CN119914948A

CN119914948A - Air conditioner with grille

Info

Publication number: CN119914948A
Application number: CN202311431001.7A
Authority: CN
Inventors: 胡天恩; 王皓楠
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2023-10-30
Filing date: 2023-10-30
Publication date: 2025-05-02
Also published as: WO2025091767A1

Abstract

The invention discloses an air conditioner with a grille, relates to the technical field of air conditioners, and aims to solve the problem that wind resistance at an air outlet grille of an outdoor unit is large in the prior art. The air outlet grating of the air conditioner with the grating comprises a positioning part, a supporting part and a grating net. The positioning part is close to the ventilation opening and connected with the shell, and the supporting part is positioned in the positioning part. The grid mesh comprises a plurality of connecting parts, a plurality of outer grid bars and a plurality of inner grid bars. The plurality of connecting portions are located between the supporting portion and the positioning portion and distributed at intervals around the supporting portion, and the supporting portion is connected with the positioning portion through at least part of the connecting portions. The outer grid strips are positioned between the positioning part and the supporting part and are distributed at intervals along the radial direction of the positioning part, and the outer grid strips are in cross connection with at least part of the connecting parts. The inner grille strips are arranged on the air inlet side of the fan close to the outer grille strips along the axial direction of the air outlet grille and are arranged at intervals with the outer grille strips. The air conditioner with the grille is used for exchanging heat with air.

Description

Air conditioner with grille

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner with a grille.

Background

The air conditioner mainly comprises an air conditioner outdoor unit and an air conditioner indoor unit, wherein an air outlet grille is arranged at an air outlet of the air conditioner outdoor unit, and is mainly used for preventing external sundries from entering the air conditioner outdoor unit to influence the normal operation of the air conditioner outdoor unit, preventing hands from contacting a fan in the air conditioner outdoor unit to cause safety accidents, and meanwhile, wind generated by the fan in the air conditioner outdoor unit needs to reach the outside through the air outlet grille.

At present, in order to reduce the production cost of the air outlet grille of the air conditioner outdoor unit, the air outlet grille is generally made of a plastic material, and parameters such as the length, the axial height and the like of ribs of the air outlet grille made of the plastic material are limited due to the limitation of a die process, so that the air outlet quantity of the air outlet grille is limited, and further, larger resistance is generated on air blown out by a fan of the air conditioner outdoor unit.

In view of the above, in the present stage, the resistance of the air outlet grille to the air blown by the fan of the air conditioner outdoor unit is generally reduced by adjusting the gaps between the ribs in the air outlet grille. However, the width of the gaps between the ribs in the air outlet grille needs to meet the relevant standard, i.e. the width of the gaps is limited and cannot be too large, so that the air outlet grille still generates larger resistance to the air blown by the fan of the air conditioner outdoor unit.

Disclosure of Invention

The embodiment of the invention provides an air conditioner with a grille, which solves the problem of larger wind resistance at an air outlet grille of an outdoor unit in the prior art.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:

An air conditioner with a grille comprises a casing, a fan and an air outlet grille. The inside of casing is formed with holds the chamber, and has seted up the vent on the lateral wall of casing, and the fan is located holds the intracavity, and the vent is located the air-out side of fan. The air outlet grating comprises a positioning part and a grating net. The positioning part is arranged close to the ventilation opening and is connected with the shell. The grid mesh is positioned at the inner side of the positioning part and is connected with the positioning part, and the grid mesh is of a multilayer serial structure which is distributed at intervals along the axial direction of the air outlet grid and is used for circulating air.

In some embodiments, the grille net is for ventilation and includes a plurality of connections, a plurality of outer grille strips, and a plurality of inner grille strips. The plurality of connecting portions are located between the supporting portion and the positioning portion and distributed at intervals around the supporting portion, and the supporting portion is connected with the positioning portion through at least part of the connecting portions. The outer grid strips are positioned between the positioning part and the supporting part and are distributed at intervals along the radial direction of the positioning part, and the outer grid strips are in cross connection with at least part of the connecting parts. The inner grille strips are arranged on the air inlet side of the fan close to the outer grille strips along the axial direction of the air outlet grille and are arranged at intervals with the outer grille strips.

According to the air conditioner with the grille, provided by the application, the air can be driven to circularly flow between the accommodating cavity and the external environment through the ventilation opening by the fan, and the circularly flowing air flows in the accommodating cavity through the heat exchanger and exchanges heat with the refrigerant flowing in the heat exchanger, so that a refrigerating or heating system of the air conditioner can stably run. The positioning part is arranged close to the ventilation opening and connected with the casing for positioning and mounting the grid mesh.

The grid mesh is of a multilayer serial structure which is distributed at intervals along the axial direction of the positioning part, and is used for preventing external foreign matters from entering the accommodating cavity through the ventilation opening and circulating air. The air can be pneumatically separated and reattached many times when flowing through the grid mesh with the multi-layer tandem structure, so that the thickness of the boundary layer attached to the wall surface of the grid bar is always in a small range. In this way, the friction resistance is reduced, the adhering time of the fluid on the grid strip wall surface of the multi-layer grid mesh can be prolonged, for example, the friction resistance between the fluid and the inner grid strip and the outer grid strip can be reduced, the adhering time of the fluid on the wall surface of the inner grid strip and the outer grid strip can be increased, the decelerating effect generated after the pneumatic separation of the fluid is delayed, and meanwhile, the air flowing out of the grid mesh after the pneumatic separation and reattachment for many times has a smaller turbulence area. Therefore, the arrangement of the grid mesh with the multilayer serial structure does not increase the wind resistance at the inner side of the positioning part, but greatly reduces the area of the low-speed vortex area at the air outlet side of the grid mesh and the thickness of the boundary layer, so that air can quickly and smoothly flow through the grid mesh with the multilayer structure, thereby reducing the wind resistance and the pneumatic noise at the air outlet grid and improving the air outlet efficiency, and being beneficial to improving the air outlet quantity of the outdoor unit.

Drawings

Fig. 1 is a schematic perspective view of an outdoor unit of an air conditioner according to an embodiment of the present application;

FIG. 2 is a front view of the air outlet grill shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of a wind farm simulation of an air outlet grille of a single-layer grille structure;

FIG. 5 is a schematic view of a wind farm simulation of the air outlet grille of the double-layered grille structure of FIG. 3;

FIG. 6 is an enlarged partial schematic view at B in FIG. 3;

FIG. 7 is an enlarged partial schematic view of FIG. 3 at C;

FIG. 8 is a partially enlarged schematic illustration of FIG. 3D;

FIG. 9 is an enlarged partial schematic view of FIG. 3 at E;

FIG. 10 is an enlarged partial schematic view of the grille net shown in FIG. 3 adjacent the support;

FIG. 11 is a schematic diagram showing a broken line relationship between air volume and noise in a control group and a modified group of an outdoor unit;

FIG. 12 is one of the front views of the air grille of FIG. 1 in another embodiment;

FIG. 13 is a cross-sectional view of the air grille of FIG. 12;

FIG. 14 is an enlarged partial schematic view of FIG. 13 at F;

FIG. 15 is a second elevation view of the air grille of FIG. 1 in another embodiment;

FIG. 16 is a third elevational view of the grille shown in FIG. 1 in another embodiment;

FIG. 17 is a fourth elevation view of the air grille shown in FIG. 1 in another embodiment;

FIG. 18 is a schematic view of a partial structure of the air grill of FIG. 12;

FIG. 19 is a partially enlarged schematic illustration of FIG. 13 at G;

FIG. 20 is a schematic diagram of a simulation of the resistance of the sixth air-out grille to wind when the radial dimension of the air-out grille is not adjusted;

FIG. 21 is a schematic diagram of a simulation effect of resistance of the sixth air-out grille to wind after the radial dimension of the sixth air-out grille is adjusted;

FIG. 22 is a schematic diagram of a simulation of the resistance of the eighth air-out grille to wind when the radial dimension of the eighth air-out grille is not adjusted;

FIG. 23 is a schematic diagram showing the simulation effect of the resistance of the eighth air-out grille to wind after the radial dimension of the eighth air-out grille is adjusted;

FIG. 24 is another cross-sectional view of the air grill shown in FIG. 12;

FIG. 25 is an enlarged partial schematic view of the portion I in FIG. 24;

FIG. 26 is a schematic view of another partial structure of the air grill of FIG. 12;

FIG. 27 is a schematic diagram showing the simulation effect of the resistance of the air outlet grille to wind when no through hole is formed in the outer side wall of the positioning part;

FIG. 28 is a schematic diagram showing the simulation effect of the resistance of the air outlet grille to wind after the through holes are formed in the outer side wall of the positioning part;

fig. 29 is a sectional view of the outdoor unit shown in fig. 1;

FIG. 30 is a graph showing the relationship between the ratio of the third dimension to the fifth dimension at the same rotation speed and the air volume;

fig. 31 is an enlarged schematic view of the structure at J in fig. 29.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

An air conditioner is widely used in daily life as a relatively common household appliance, and comprises an outdoor unit and an indoor unit, so that the indoor air temperature is adjusted through cooperation between the outdoor unit and the indoor unit.

When the air conditioner is used for refrigerating, the compressor in the outdoor unit compresses the gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, and the high-temperature high-pressure gaseous refrigerant is radiated into a normal-temperature high-pressure liquid refrigerant through the heat exchanger of the outdoor unit. The liquid refrigerant with normal temperature and high pressure is decompressed by a pressure reducer such as a capillary tube or an electronic throttle valve and then enters the indoor unit, the liquid refrigerant with normal temperature and low pressure absorbs a large amount of heat through a heat exchanger of the indoor unit and is vaporized to flow into the compressor to continue circulating, the air temperature in the inner cavity of the indoor unit is reduced, and the fan of the indoor unit outputs the air with low temperature through the grille, so that the indoor air is cooled.

When the air conditioner heats, the compressor in the outdoor unit compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant enters the heat exchanger of the indoor unit to be condensed and liquefied into a normal-temperature and high-pressure liquid refrigerant, and a large amount of heat is emitted. The temperature of the air in the inner cavity of the indoor unit is increased, the fan of the indoor unit outputs the air with high temperature through the grille, so that the temperature of the indoor air is increased, the liquid refrigerant with normal temperature and high pressure is decompressed through the pressure reducer and then enters the heat exchanger of the outdoor unit, and the liquid refrigerant with normal temperature and high pressure is evaporated and absorbed into the gaseous refrigerant with low temperature and low pressure and flows into the compressor for continuous circulation.

In the running process of the air conditioner, the outdoor unit conveys the wind blown by the fan into the air nearby the outdoor through the air outlet grille, the air outlet grille can prevent external sundries from entering the outdoor unit to influence the normal running of the outdoor unit, hands of people from contacting with the fan inside the outdoor unit can be avoided, and the safety performance of the outdoor unit is improved. But the grid also generates resistance to the wind blown out by the fan of the outdoor unit, and also causes loss to the wind quantity of the outdoor unit, thereby influencing the overall performance of the outdoor unit.

In order to reduce the production cost, the air outlet grating of the air conditioner outdoor unit is usually made of plastic materials, and the parameters such as the height, thickness, length and the like of ribs of the air outlet grating made of the plastic materials are limited due to the limitation of a die process, so that the air outlet quantity of the air outlet grating is limited. And then the air outlet grating generates larger resistance to the wind blown out by the fan of the air conditioner outdoor unit, if the air quantity requirement is met, the rotating speed of the fan needs to be increased, so that the power of the fan can be increased, the running cost of the fan is increased, and the energy efficiency ratio of the air conditioner is reduced.

In view of the above, at present, the resistance of the air outlet grille to the wind blown by the fan of the air conditioner outdoor unit is generally reduced by adjusting the radial or circumferential gaps among the ribs in the air outlet grille. However, the width of the gaps between the ribs in the air-out grille is required to meet the relevant standards, so that the safety performance of the outdoor unit is improved.

For example, one of the specifications has a strict limitation on the gap width, i.e. the gap width between two adjacent ribs needs to be able to prevent the insertion of a child's finger. Therefore, a small gap between ribs in the air outlet grille is required, that is, the width of the gap is limited and cannot be too large, so that the air outlet grille generates large resistance to air blown by a fan of the air conditioner outdoor unit.

Accordingly, as shown in fig. 1, fig. 1 is a schematic perspective view of an outdoor unit 20 of an air conditioner 100 according to an embodiment of the present application, and the outdoor unit 20 includes a casing 1, a fan 2, and an air outlet grille 3. The inside of casing 1 is formed with holds chamber 11, and fan 2 is located holds intracavity 11, has seted up vent 12 on the lateral wall of casing 1, and vent 12 is located the air-out side of fan 2.

For example, the ventilation opening 12 may be formed on a front side wall of the casing 1, and the air inlet may be formed on at least one side of a rear side wall, a left side wall, and a right side wall of the casing 1, and the heat exchanger of the outdoor unit may be located in the receiving chamber and disposed near the air inlet. Or the upper side wall of the casing 1 may be provided with a ventilation opening 12, and at least one of the front and rear or left and right side walls of the casing 1 may be provided with an air inlet, so that the air outlet side of the fan 2 may be disposed upward toward the ventilation opening 12, so as to drive air to flow in the air inlet, the accommodating cavity and the ventilation opening.

Thus, the air flowing into the accommodating cavity 11 can exchange heat with the heat exchanger in the accommodating cavity 11 sufficiently, so that the refrigerant in the heat exchanger can be quickly heat-exchanged and liquefied (in a refrigerating state) or heat-absorbed and vaporized (in a heating state), and the heat-exchanged air can be discharged out of the accommodating cavity 11 through the ventilation opening 12.

As shown in fig. 1, the fan 2 may include a motor 21 and fan blades 22, where the motor 21 is connected to the casing 1, and the motor 21 may be fixedly installed in the accommodating cavity 11 through a bracket or the like. The fan blade 22 is connected with the motor 21, and the fan blade 22 is opposite to the ventilation opening 12, and the motor 21 can drive the fan blade 22 to rotate, so that the fan blade 22 drives tiny particles (various gas molecules, dust and the like) in the air to rapidly move along the axial direction of the motor 21 and the fan blade 22, and wind is formed.

By rotating the fan blade 22, air on the side of the fan blade 22 away from the ventilation opening 12 can be continuously sent to the side of the fan blade 22 close to the ventilation opening 12, so that a high pressure area is formed on the side of the fan blade 22 close to the ventilation opening 12, and the side of the fan 22 away from the ventilation opening 12 is a negative pressure area. Air outside the casing 1 can continuously flow into the low-pressure area under the action of atmospheric pressure and is acted on the high-pressure area by the rotating fan blades 22 to form high-pressure air, and the high-pressure air can be blown out through the ventilation openings 12, so that the circulating flow of the air is formed, and the air can be continuously blown out from the ventilation openings 12 for efficient heat exchange of the heat exchanger.

Under the continuous rotation of the fan blades, the continuous wind flows to the ventilation opening 12 and flows through the ventilation opening 12 to be discharged to the outside of the machine shell 1.

The air outlet grating 3 is arranged at the air vent 12 and is fixed on the casing 1 for protecting the fan 2 and improving the safety performance of the air conditioner outdoor unit. During the process of flowing through the ventilation opening 12 and discharging outside the casing 1, wind flows through the air outlet grating 3, and in order to reduce the wind resistance when the air outlet grating 3 is arranged at the air outlet opening 12.

As shown in fig. 2 and 3, the air outlet grill 3 includes a positioning portion 31, a supporting portion 32, and a grill net 33. The positioning portion 31 is provided near the vent 12 and connected to the casing 1. The positioning portion 31 may be a regular or irregular frame structure such as a round frame, an oval frame, a rectangular frame and a triangular frame, and the positioning portion 31 may be detachably mounted on an edge of the casing 1 near the ventilation opening 12 by a screw or a clamping connection, for supporting and fixing the air outlet grille 3, and the supporting portion 32 is located inside the positioning portion 31.

As shown in fig. 2 and 3, the supporting portion 32 may be a disk-shaped structure, and the supporting portion 32 of the disk-shaped structure may be disposed near the center of the positioning portion 31, so that the grid mesh 33 is connected and installed between the positioning portion 31 and the supporting portion 32. Alternatively, the grid mesh 33 may be directly mounted inside the positioning portion 31, and the supporting portion 32 may be regarded as a portion of the grid mesh 33 near the center area, which is simple in structure.

Based on this, as shown in fig. 3, the grill 33 is located inside the positioning portion 31 and connects the positioning portion 31 and the supporting portion, and the grill 33 is a multi-layered serial structure that is distributed at intervals in the axial direction of the air outlet grill 3 for ventilation. In connection with fig. 1, in the axial direction of the air outlet grille 3, an air inlet side is taken as an example on one side of the air outlet grille 3 close to the fan 2, and an air outlet side is taken as an example on one side of the air outlet grille 3 far from the fan 2.

It has been found that, as shown in fig. 4, fig. 4 is a schematic diagram of a wind field simulation of an air outlet grille with a single-layer grille structure, and that when air flows through an air outlet grille 3 with a single-layer grille structure 33, serious flow separation occurs on the air outlet side of the grille. Thereby forming a large area of low velocity vortex region, resulting in increased aerodynamic drag at the grid 33, and the low velocity vortex region also results in increased turbulent kinetic energy at the grid 33, such that aerodynamic noise is significantly increased.

Illustratively, as shown in fig. 4, the air outlet side of the multiple gratings near the supporting portion 32 forms a large low-speed vortex region, and the air inlet side, the air outlet side, and the region between two adjacent gratings near the positioning portion 31 forms a low-speed vortex region. That is, the air has a large wind resistance and a low wind speed in the process of flowing through the grill 33 of the structure, thereby reducing the air outlet efficiency of the outdoor unit.

However, by providing the grill net 33 with a multi-layered serial structure that is spaced apart along the axial direction of the positioning portion 31, as shown in fig. 5, fig. 5 is a schematic view of a wind field simulation of the air outlet grill 3 of the double-layered grill structure shown in fig. 3. The arrangement of the multi-layered structure of the grille 33 does not increase the wind resistance inside the positioning portion 31, and greatly reduces the area of the low-speed vortex area at the air outlet side of the grille 33 (especially the air outlet side of the outer grille), so that air can quickly and smoothly flow through the multi-layered structure of the grille 33, thereby reducing the wind resistance and the pneumatic noise at the air outlet grille 3 and improving the air outlet efficiency.

In addition, since the grill nets 33 are of a multi-layered serial structure which is spaced apart along the axial direction of the air outlet grill 3, air can be pneumatically separated and reattached many times while passing through the grill nets 33 of the multi-layered serial structure, so that the thickness of the boundary layer attached to the wall surface of the grill is always in a small range. Therefore, the friction resistance is reduced, the attachment time of the fluid on the grid strip wall surface of the multi-layer grid mesh can be prolonged, for example, the friction resistance between the fluid and the inner grid strip and between the fluid and the outer grid strip can be reduced, the attachment time of the fluid on the wall surfaces of the inner grid strip and the outer grid strip can be prolonged, and the deceleration effect generated after the pneumatic separation of the fluid can be delayed.

In some embodiments, as shown in fig. 6, fig. 6 is an enlarged partial schematic view at B in fig. 3, the grid mesh 33 may include a plurality of connection portions 331, a plurality of outer grid bars 332, and a plurality of inner grid bars 333. The supporting portion 331 may be a strip structure, the plurality of connecting portions 331 may be distributed between the supporting portion 32 and the positioning portion 31, and the plurality of connecting portions 331 may be distributed at intervals around the supporting portion 32, so that the supporting portion 32 may be connected with the positioning portion 31 through at least part of the connecting portions 331.

As shown in fig. 6, taking an example in which the axis of the air outlet grill 3 is parallel to the Y direction, the axis of the motor 21 (shown in fig. 1) and the axis of the fan blade 22 may be collinear and disposed parallel to the Y direction, and the axis of the vent 12 may be also parallel to the Y direction. Correspondingly, the side of the air outlet grating 3 away from the fan 2 along the Y direction is the air outlet side (i.e. the outer side or the front side), and the side of the air outlet grating 3 close to the fan 2 along the Y direction is the air inlet side (i.e. the inner side or the rear side).

Based on this, as shown in fig. 6, the plurality of outer grill strips 332 are located between the positioning portion 31 and the supporting portion 32, and the plurality of outer grill strips 332 may be spaced apart in the radial direction of the positioning portion 31. A plurality of outer grid strips 332 may be cross-connected with at least a portion of the connection portions 331 to form an outer layer structure of the grid 33.

With continued reference to fig. 6, a plurality of inner grill strips 333 are positioned on the air intake side of the outer grill strips 332 and spaced apart from the outer grill strips 332 in the Y direction. Referring to fig. 5, in the process of flowing air from the air inlet side to the air outlet side of the air outlet grill 3 in the Y direction, although the air is partially separated by flowing after flowing through the inner grill strip 333, the air is rapidly adhered to the surface of the outer grill strip 332 and is secondarily separated by flowing after flowing through the outer grill strip 332.

As can be seen from the wind field simulation effect shown in fig. 5, after the air flows through the inner grid 333 and the outer grid 332 and is separated by two flows, the low-speed vortex area at the grid 33 (especially at the air outlet side of the outer grid 332) is greatly reduced, which is beneficial to reducing the wind resistance aerodynamic noise at the grid 33. And, a part of the air may have an acceleration effect when passing through the gaps between the inner grill 333 and the outer grill 332, thereby improving the flow rate of the air, being beneficial to improving the air output at the grill 33, reducing the wind resistance at the grill 33, and improving the air output efficiency.

In short, the grid mesh 33 of the multi-layer serial structure is disposed at the inner side of the positioning portion 31 and is distributed at intervals along the axial direction, so that the wind resistance of the air outlet grid 3 is not increased additionally, but the wind resistance and the pneumatic noise of the air outlet grid 3 are reduced, and the air outlet efficiency is improved.

In the embodiment of the present application, the positioning portion 31 may have a circular ring structure or an elliptical ring structure, or may have other frame structures. The outer grill 332 and the inner grill 333 may have a circular ring structure or an elliptical ring structure that is adapted to the shape of the positioning portion, or may have an arc rib structure, a linear rib structure, or a combination structure of an arc rib and a linear rib, which is not limited thereto.

In some embodiments, as shown in fig. 6, the plurality of inner grid bars 333 may include a plurality of first inner grid bars 3331, a plurality of second inner grid bars 3332, and a plurality of third inner grid bars 3333. Taking the first inner grating 3331, the second inner grating 3332 and the third inner grating 3333 as an example, the first inner grating 3331, the third inner grating 3333 and the second inner grating 3332 are spaced and distributed in sequence from the supporting portion 32 to the positioning portion 31 along the radial direction of the positioning portion 31.

As shown in fig. 6, in the radial direction of the positioning portion 31, a plurality of first inner grating strips 3331 are disposed adjacent to the supporting portion 32 and are spaced apart, a plurality of second inner grating strips 3332 are disposed adjacent to the positioning portion 31 and are spaced apart, and a plurality of third inner grating strips 3333 are disposed between the first inner grating strips 3331 and the second inner grating strips 3332 and are spaced apart.

For example, in an annular region between the support portion 32 and the positioning portion 31, in an inner annular region, a plurality of first inner grating strips 3331 of annular structure may be distributed at intervals in a radial direction of the positioning portion 31, and one of the adjacent two first inner grating strips 3331 distant from the support portion 32 has a larger radial dimension. In the middle ring region, the third inner grating 3333 of the plurality of ring structures may be spaced apart in the radial direction of the positioning portion 31, and in the outer ring region, the second inner grating 3332 of the plurality of ring structures may be spaced apart in the radial direction of the positioning portion 31.

That is, the plurality of first inner grating strips 3331 in the inner ring region may be regarded as a plurality of concentric ring structures sequentially increasing in radial dimension outwardly (i.e., the direction from the support portion 32 to the positioning portion 31), the plurality of third inner grating strips 3333 in the middle ring region may be regarded as a plurality of concentric ring structures sequentially increasing in radial dimension outwardly, and the plurality of second inner grating strips 3332 in the outer ring region may be regarded as a plurality of concentric ring structures sequentially increasing in radial dimension outwardly. The first inner grating strips 3331, the second inner grating strips 3332 and the third inner grating strips 3333 are different in mounting position, and the deflection angles of the different inner grating strips 333 relative to the axis of the positioning portion 31 are different.

As shown in fig. 6 and 7, fig. 7 is a partially enlarged schematic view of fig. 3C, and at a position near the supporting portion 32 inside the positioning portion 31, an outer (i.e., air-out side) edge of the first inner grating 3331 may be inclined toward the direction near the supporting portion 32 along a radial direction of the positioning portion 31 by a first inner included angle α1. For example, the longitudinal direction of the first inner grating 3331 is the extending direction of the first inner grating 3331 around the supporting portion 32, and in a cross section of the first inner grating 3331 perpendicular to the longitudinal direction (as shown in fig. 7), an included angle formed by the chord length of the first inner grating 3331 along the width direction and the Y direction is the first inner included angle α1.

As shown in fig. 6 and 8, fig. 8 is a partially enlarged schematic view of fig. 3D, where the outer (i.e., air outlet side) edge of the second inner grating 3332 is disposed at a position near the positioning portion 31 inside the positioning portion 31, and may be inclined by a second inner included angle α2 in a direction away from the supporting portion 32 along the radial direction of the positioning portion 31. For example, the length direction of the second inner grating 3332 is the extending direction of the second inner grating 3332 around the supporting portion 32, and in the cross section of the second inner grating 3332 perpendicular to the length direction (as shown in fig. 8), the included angle formed by the chord length of the second inner grating 3332 along the width direction and the Y direction is the second inner included angle α2.

As shown in fig. 6 and 9, fig. 9 is a partially enlarged schematic view at E in fig. 3, at a plurality of third inner grating 3333 between the first inner grating 3331 and the second inner grating 3332, the third inner grating 3333 may be disposed to extend in the Y direction in a height direction, i.e., the third inner grating 3333 may be disposed perpendicular to a radial direction of the positioning portion 31.

Taking the first inner grating 3331, the second inner grating 3332 and the third inner grating 3333 as an example, the first inner grating and the second inner grating are in a circular ring structure from the air inlet side to the air outlet side along the Y direction:

the third inner grating 3333 may be approximately a circular structure of cylindrical sidewalls.

The first inner grating 3331 may be approximately a flare structure with radially-increasing radial dimension, and the flare structure has a first inner included angle compared with the opening angle of the central axis.

The second inner grating 3332 may be approximated by a reverse flare structure having a radial dimension gradually decreasing outward, and the opening angle of the flare structure is a second inner included angle compared to the center line thereof.

When the air flows out of the accommodating cavity 11 from the ventilation opening 12 along the Y direction under the driving of the fan 2 with the axial flow type structure, part of air near the supporting part 32 flows towards the direction near the axis of the positioning part 31 between the positioning part 31 and the supporting part 32 of the air outlet grille 3, part of air near the positioning part 31 flows towards the direction far from the axis of the positioning part 31, and part of air in the middle area between the two parts of air flows approximately parallel to the Y direction.

In this way, in the region between the support portion 32 and the positioning portion 31, since the air has different flow directions in different regions, by the above-described differentiated arrangement of the first, second, and third inner grill strips 3331, 3332, 3333, the inner grill strips 333 can be arranged in the flow direction of the air at the corresponding positions. That is, when air flows through the gap between two adjacent inner grille strips 333, the flowing direction of the air can be approximately parallel to the setting direction of the inner grille strips 333 on two sides of the gap relative to the Y direction, thereby reducing the wind resistance of the air outlet grille 3 and being beneficial to improving the wind quantity and the wind outlet efficiency of the air outlet grille 3.

It should be noted that, along the radial dimension of the positioning portion 31, the thickness dimension of the inner grid 333 at the windward side edge may be smaller, for example, the thickness dimension of the inner grid 333 at the windward side edge gradually decreases from the air outlet side to the air inlet side, and the inner grid is applicable to at least one of the first inner grid 3331, the second inner grid 3332, and the third inner grid 3333. The air resistance of the inner grill strip 333 on the windward side is advantageously reduced, and the air can rapidly flow out along the side wall of the inner grill strip 333.

Correspondingly, along the radial dimension of the positioning portion 31, the thickness dimension of the air inlet side edge of the outer grill 332 may be smaller, which is suitable for at least one of the first outer grill 3321, the second outer grill 3322, and the third outer grill 3323. In addition, for the air outlet side edge of the outer grille strip 332 and the inner grille strip 333, a thinner radial dimension can be set, that is, the thickness dimension of the air outlet side edge is gradually increased from the air outlet side to the air inlet side, so that air can adhere to the side walls of the outer grille strip 332 and the inner grille strip 333 to flow, and the flow speed of the air can be improved.

In some embodiments, when the plurality of inner grid bars 333 and the plurality of outer grid bars 332 are arranged, in the case where the grid mesh 33 includes the first outer grid bars 3321, the second outer grid bars 3322, the third outer grid bars 3323, the first inner grid bars 3331, the second inner grid bars 3332, and the third inner grid bars 3333 at the same time:

Along the axial direction of the positioning portion 31, at a first inner grating 3331 and a first outer grating 3321 which are adjacently arranged, a ratio of the first outer included angle to the first inner included angle may be 0.4-0.5 or 0.5-0.6, for example, a ratio of the first outer included angle to the first inner included angle may be 0.5. By arranging the first outer grating 3321 with smaller inclined dimension, the air can smoothly flow through the gaps between two adjacent first outer grating 3321, and the flowing direction of the air can be corrected by the first outer grating 3321, so that the flowing direction of the air after flowing out from the grating net 33 has smaller included angle with the Y direction or is approximately parallel to the Y direction, which is beneficial to improving the air supply distance of the air blown out from the ventilation opening 12 of the outdoor unit 20 and reducing the wind resistance.

If the ratio of the first outer included angle to the first inner included angle is smaller than 0.4, the air flow direction changes greatly, i.e. the wind resistance is larger, during the process of sequentially flowing through the first inner grating 3331 and the first outer grating 3321. If the ratio of the first outer included angle to the first inner included angle is greater than 0.6, the included angle between the air direction and the central axis when the air flows out of the first outer grille strip 3321 is greater, so that the air supply distance of the air outlet grille 3 can be reduced.

Correspondingly, along the axial direction of the positioning portion 31, at a second inner grating 3332 and a second outer grating 3322 which are adjacently arranged, a ratio of the second outer included angle to the second inner included angle may be set to be 0.4-0.5 or 0.5-0.6, for example, a ratio of the second outer included angle to the second inner included angle may be set to be 0.5. By providing the second outer grill strips 3322 with a smaller inclined dimension, the air can smoothly flow through the gaps between two adjacent second outer grill strips 3322, and the flow direction of the air can be modified by the second outer grill strips 3321, so that the flow direction of the air after flowing out from the grill net 33 has a smaller included angle with the Y direction or is approximately parallel to the Y direction, which is beneficial to improving the air supply distance of the air blown out from the ventilation opening 12 of the outdoor unit 20.

It should be noted that, in the above embodiment, the two conditions that the ratio of the second outer angle to the second inner angle is 0.4-0.5 or 0.5-0.6, and the ratio of the first outer angle to the first inner angle is 0.4-0.5 or 0.5-0.6 may be set independently or may be set simultaneously, which is not limited in the present application.

In other embodiments, the first outer included angle may be equal to the first inner included angle, and the second outer included angle may be equal to the second inner included angle, so that the windage at the grid 33 is reduced to the maximum, which is beneficial to further improving the air output of the outdoor unit 20. Alternatively, the first external included angle and the second external included angle may be set to be zero, so that the air blown out by the grid mesh 33 may flow parallel to the Y direction, which is advantageous for further increasing the air supply distance of the outdoor unit 20.

Since the air flows through the area between the support portion 32 and the positioning portion 31 of the grill 33, the air is displaced from inside to outside in the direction of approaching the central axis (e.g., the support portion 32) in the direction of approaching the support portion 32, and the air is displaced from inside to outside in the direction of approaching the positioning portion 31 in the direction of approaching the central axis (e.g., the support portion 32) in the direction of approaching the support portion 32. The offset angle of the air flow is gradually reduced by the positioning portion 31 radially inward (near the supporting portion 32) and by the supporting portion 32 radially outward (near the positioning portion 31), such as a part of the air may flow in the Y direction.

Based on this, at the plurality of first inner grating strips 3331, in connection with fig. 6, along the radial direction of the positioning portion 31, a first inner angle of the first inner grating strips 3331 distant from the supporting portion 32 may be set to be smaller than or equal to a first inner angle of the first inner grating strips 3331 close to the supporting portion 32. Namely, from the supporting portion 32 to the positioning portion 31 along the radial direction, the first inner angles of the first inner grating strips 3331 are set in a decreasing trend, and the first outer angles of the first outer grating strips 3321 are set in a decreasing trend, so as to reduce the wind resistance at the grating net 33 to improve the wind output and increase the outward flowing distance of air.

Correspondingly, at the plurality of second inner grating strips 3332, referring to fig. 6, a second inner included angle of the second inner grating strips 3332 far from the positioning portion 31 may be set smaller than or equal to a second inner included angle of the second inner grating strips 3332 near to the positioning portion 31 along the radial direction of the positioning portion 31. Namely, the second inner angles of the second inner grating strips 3332 are gradually decreased from the supporting portion 32 to the positioning portion 31 along the radial direction, and the second outer angles of the second outer grating strips 3322 are gradually decreased to reduce the wind resistance at the grating mesh 33 so as to increase the air output and increase the outward flowing distance of air.

For example, the first internal included angle may be set to be greater than 0 ° and less than or equal to 30 °. If the first inner angle is greater than 30 ° the air flowing out of the grille net 33 will deflect more severely relative to the axial direction in the flow direction box, the air supply distance will be shorter, and the inner grille bars 333 at the inner angle of 0 ° will be the second inner grille bars 3332.

The second internal included angle may be set to be greater than 0 ° and less than or equal to 30 °. If the second inner angle is greater than 30 °, the air flowing out of the grid mesh 33 is deflected more seriously outward with respect to the axial direction, the air supply distance is shorter, and the inner grid bars 333 at the inner angle of 0 ° are the second inner grid bars 3332.

Correspondingly, the first external angle may be set to be greater than 0 ° and less than or equal to 15 °. The second included angle may also be set to be greater than 0 ° and less than or equal to 15 °, which is not limited in the present application.

In other embodiments, the grid mesh 33 may be provided with a plurality of first outer grid strips 3321, a plurality of second outer grid strips 3322, a plurality of first inner grid strips 3331, and a plurality of second inner grid strips 3332.

Along the radial direction of the positioning portion 31, at a plurality of first inner grating strips 3331 far from the supporting portion 32, a first inner included angle may be set to be smaller (for example, 0.5 ° -2 °), and at a plurality of second inner grating strips 3332 far from the positioning portion 31, a second inner included angle may be set to be smaller (for example, 0.5 ° -2 °). Therefore, a plurality of third inner grating strips are not required to be arranged between the first inner grating strip 3331 and the second inner grating strip 3332, and a plurality of third outer grating strips are not required to be arranged between the first outer grating strip 3321 and the second outer grating strip 3322, so that the wind resistance is reduced, the wind output and the wind supply distance are improved, and the structure is simple.

In some embodiments, the plurality of outer grid bars 332 and the plurality of inner grid bars 333 may be disposed in a one-to-one correspondence in the Y direction, or one inner grid bar 333 may be disposed at intervals of one or more outer grid bars 332 in the radial direction of the positioning portion 31. The wind resistance and the pneumatic noise of the air outlet grille 3 are reduced, the air outlet efficiency of the air outlet grille 3 is improved, and the air outlet grille is not limited.

As shown in fig. 6, the plurality of outer grill strips 332 are located at the air outlet side of the plurality of inner grill strips 333 in the Y direction and are spaced apart, and the plurality of outer grill strips 332 may include a plurality of first outer grill strips 3321, a plurality of second outer grill strips 3322, and a plurality of third outer grill strips 3323. Taking the first outer grating 3321, the second outer grating 3322 and the third outer grating 3323 as an example, the first outer grating 3321, the third outer grating 3323 and the second outer grating 3322 are spaced and sequentially distributed from the supporting portion 32 to the positioning portion 31 along the radial direction of the positioning portion 31.

Illustratively, along the radial direction of the positioning portion 31, a plurality of first outer grating strips 3321 are disposed adjacent to the supporting portion 32 and spaced apart, a plurality of second outer grating strips 3322 are disposed adjacent to the positioning portion 31 and spaced apart, and a plurality of third outer grating strips 3323 are disposed between the first outer grating strips 3321 and the second outer grating strips 3322 and spaced apart.

As shown in fig. 6 and 7, a plurality of first outer grating 3321 may be spaced apart in the radial direction of the positioning portion 31 at a position inside the positioning portion 31 near the supporting portion 32. An outer (i.e., air-out side) edge of, for example, the first outer grill strip 3321 may be inclined by a first outer angle β1 in the Y direction along the radial direction of the positioning portion 31 toward a direction approaching the supporting portion 32. The length direction of the first outer grating 3321 is the extending direction of the first outer grating 3321 around the supporting portion 32, and the included angle formed by the chord length of the first outer grating 3321 along the width direction and the Y direction in the cross section of the first outer grating 3321 perpendicular to the length direction (as shown in fig. 7) is the first outer included angle β1.

As shown in fig. 6 and 8, at a position inside the positioning portion 31 near the positioning portion 31, an outer (i.e., air-out side) edge of the second outer grill 3322 may be disposed to be inclined by a second inner angle β2 in a radial direction of the positioning portion 31 toward a direction away from the supporting portion 32. Wherein the length direction of the second outer grid 3322 is the extending direction of the second outer grid 3322 around the supporting portion 32, and the cross section of the second outer grid 3322 perpendicular to the length direction thereof (as shown in fig. 8)

The included angle formed by the chord length of the second outer grating 3322 along the width direction and the Y direction is the second inner included angle β2.

As shown in fig. 6 and 9, at the plurality of third outer grating 3323 between the first outer grating 3321 and the second outer grating 3322, the third outer grating 3323 may be disposed to extend in the Y direction in the height direction, i.e., the third outer grating 3323 may be disposed perpendicular to the radial direction of the positioning portion 31. At this time, one third inner grating 3333 may be aligned with and spaced apart from one third outer grating 3323 in the Y direction.

Taking the first outer grating 3321, the second outer grating 3322 and the third outer grating 3323 as an example, the first outer grating and the second outer grating are in a circular ring structure, and the first outer grating and the second outer grating are from the air inlet side to the air outlet side along the Y direction:

The third outer grating 3323 may be approximately a circular structure of cylindrical sidewalls.

The first outer grating 3321 may be approximated by a flare structure having a radially outwardly increasing size and having a first outer included angle as compared to the opening angle of the center line thereof.

The second outer grid 3322 may be approximated by a reverse flare structure having a radially outwardly tapered dimension and having a second outer included angle as compared to the opening angle of the central axis thereof.

In this manner, the air flow direction at the corresponding region can be matched by the adaptive arrangement of the inclination angles of the first, second and third outer grid strips 3321, 3322 and 3323 while the air flow separation is accelerated by passing between the inner and outer grid strips 333 and 332. That is, when air flows through the gap between two adjacent outer grille strips 332, the flowing direction of the air can be approximately parallel to the setting direction of the outer grille strips 332 on two sides of the gap relative to the Y direction, so that the wind resistance of the air outlet grille 3 is reduced, and the air quantity and the air outlet efficiency of the air outlet grille 3 are improved.

In some embodiments, the plurality of outer grid strips 332 in the grid 33 may be connected to at least a portion of the connection 331 and form an outer grid structure, and the plurality of inner grid strips 333 may be connected to at least a portion of the connection 331 and form an inner grid structure. That is, the grid 33 may be simultaneously provided with two layers of connection portions 331 spaced apart in the Y direction.

In this way, the inner grid bars 333 of the two-layer grid structure spaced along the Y direction may be spaced from the corresponding outer grid bars 332, so that air may flow through the inner grid bars 333 and the corresponding outer grid bars 332 sequentially from inside to outside, and may be accelerated and eddy current may be reduced by two flow separations. Meanwhile, the connection portions 331 of the two-layer grid structure spaced along the Y direction are also spaced so that air can flow through the inner connection portion 331 and the outer connection portion 331 from inside to outside in sequence, and can be accelerated and eddy current can be reduced by two-time flow separation.

Alternatively, as shown in fig. 10, fig. 10 is a partially enlarged schematic view of the grid 33 shown in fig. 3 near the supporting portion 32, and a plurality of connection portions 331 of one-layer structure may be provided in the grid 33 along the Y direction. Illustratively, at least a portion of the connection 331 may be disposed between the outer edge of the outer grid 332 and the inner edge of the inner grid 333 in the Y direction, and the portion of the connection 331 may simultaneously support and connect the outer grid 332 and the inner grid 333 to form the grid 33 of the double structure.

Thus, the grid mesh 33 can be supported by a single-layer structure as a supporting framework of a double-layer structure, so that the structure is simple and the manufacturing materials are saved. Moreover, since the connecting portion 331 is concavely disposed inward compared to the outer edge of the outer grid strip 332, the connecting portion 331 is concavely disposed outward compared to the inner edge of the inner grid strip 333, so that the manufacturing material can be further saved, and the connecting portion 331 concavely disposed outward and inward can play a part in partial hiding, so as to improve the appearance effect of the outer side of the grid 33.

It should be noted that, in the plurality of connection portions 331 that are distributed in a single layer in the grid 33, at least part of the connection portions 331 may be disposed inside the outer grid strip 332. If the outer side edge of the connecting portion 331 is concavely disposed inward than the outer grid strips 332, and the inner side edge of the connecting portion 331 can be aligned with the inner side edge of the inner grid strips 333 in the Y direction, so that the connecting portion 331 can simultaneously support and connect the inner side edge of the outer grid strips 332 and the inner grid strips 333, the structure is simple, and the better appearance effect of the outer side of the grid mesh 33 can be achieved.

Or the outer side edge of the connecting portion 331 may be flush with the outer side edge of the outer grid strip 332 in the Y direction, and the inner side edge of the connecting portion 331 may be flush with the inner side edge of the inner grid strip 333 in the Y direction, which is simple in structure.

As shown in fig. 2, a diameter size of the smallest circumscribed circle of the supporting portion 32 may be defined as a first radial size d1, and a diameter size of the largest inscribed circle inside the positioning portion 31 may be defined as a second radial size.

Taking the example in which the support portion 32 is a disk-shaped structure, if the diameter dimension of the disk-shaped structure in the Y direction is gradually changed, the first radial dimension d1 is the maximum diameter dimension of the disk-shaped structure.

If the plurality of connection portions 331 are connected in a converging manner near the center of the positioning portion 31 and form the supporting portion 32, the first radial dimension d1 may be zero or may be regarded as the diameter dimension of the hub of the fan blade 22. In this case, the support portion 32 may not be provided in the positioning portion 31, or the support portion 32 may be provided in the positioning portion 31, which is not limited thereto.

Illustratively, the plurality of outer and inner ring grid bars 332, 333 may be annular in configuration in an annular region (i.e., d1> 0) between the second radial dimension of the positioning portion 31 and the first radial dimension of the support portion 32. If there is additional space between the circular region of the second radial dimension and the positioning portion 31, the partial region may be filled by spacing the second outer grid strips 3322 and the second inner ring grid strips 3333 of arcuate and/or linear configuration.

If the support portion 32 is of a disk-like structure, in a region where the circular region of the first radial dimension coincides with the support portion 32, the partial region may be filled with the first outer grating 3321 and the first inner grating 3331 of the arc-shaped structure and/or the linear structure at intervals.

If the supporting portion 32 is formed by interconnecting the plurality of connecting portions 331, the first diameter may be regarded as the diameter of the hub of the fan blade 22, and the circular area in the first diameter may be filled with the first outer grating 3321 and the first inner grating 3331 of the annular structure at intervals.

In this case, when the plurality of first outer grating bars 3321, the plurality of third outer grating bars 3323, and the plurality of second outer grating bars 3322 are simultaneously provided on the outer side of the grating net 33, the positioning portion 31 is positioned in a circular area between the first radial dimension and the second radial dimension in the radial direction:

The maximum ratio of the difference between the diameter dimension of the first outer grating 3321 and the first radial dimension to the difference between the second radial dimension and the first radial dimension may be 0.2 to 0.3. That is, the ratio of the difference between the diameter dimension of one first outer grating strip 3321 closest to the positioning portion 31 (the periphery) and the first radial dimension to the difference between the second radial dimension and the first radial dimension may be 0.2-0.3, so as to define the arrangement area of the plurality of first outer grating strips 3321, which may be flexibly designed according to the air outlet condition of the fan blades 22 with the axial flow structure.

The minimum ratio of the difference between the diameter dimension of the second outer grating 3321 and the first radial dimension to the difference between the second radial dimension and the first radial dimension is 0.7-0.8. That is, the ratio of the difference between the diameter size of one second outer grating strip 3322 closest to the supporting portion 32 (inner periphery) and the first radial size to the difference between the second radial size and the first radial size may be 0.7-0.8, so as to define the arrangement areas of the plurality of second outer grating strips 3322, which may be flexibly designed according to the air outlet condition of the fan blades 22 with the axial flow structure.

Based on this, in the region between the outermost first outer grating 3321 and the innermost second outer grating 3322, a plurality of third outer grating 3323 may be arranged to be filled at intervals in the radial direction so that the radial interval dimension of the grating net 33 meets the relevant standard. And, the air flowing out from the region can be made to smoothly and rapidly flow in the Y direction.

For example, on the inner side of the grid 33 along the Y direction, a part of the inner sides of the first outer grid strips 3321 may be correspondingly provided with a first inner grid strip 3331 and arranged at intervals, a part of the inner sides of the second outer grid strips 3322 are correspondingly provided with a second inner grid strip 3332 and arranged at intervals, and a part of the inner sides of the third outer grid strips 3322 are correspondingly provided with a third inner grid strip 3332 and arranged at intervals, so that the structure is simple.

Alternatively, on the inner side of the grid 33, a plurality of first inner grid bars 3331 may be disposed in one-to-one correspondence with a plurality of first outer grid bars 3321 at intervals along the Y direction, a plurality of third inner grid bars 3333 may be disposed in one-to-one correspondence with a plurality of third outer grid bars 3323 at intervals along the Y direction, and a plurality of second inner grid bars 3332 may be disposed in one-to-one correspondence with a plurality of second outer grid bars 3322 at intervals along the Y direction. The wind resistance of the air outlet grille 3 is reduced and the air supply distance is increased.

In some embodiments, as shown in fig. 10, in a cross section perpendicular to the length direction of the outer and inner grid bars 332, 333:

The maximum chord length of the outer grating strip 332 at this time is the outer width dimension Lj of the outer grating strip 332, and the included angle formed by the width direction of the outer grating strip 332 and the axis (parallel to the Y direction) of the positioning portion 31 is the outer included angle β, which includes the first outer included angle and the second outer included angle. Taking the example that the plurality of outer grating bars 332 have equal outer width dimensions, the outer angles at the first outer grating bar 3321 and the second outer grating bar 3322 are greater than zero (i.e., the corresponding first outer angles and second outer angles) along the Y-direction, such that the height dimension of the first outer grating bar 3321 and the second outer grating bar 3322 along the Y-direction is less than the outer width dimension thereof, and the height dimension of the third outer grating bar 3323 along the Y-direction is equal to the outer width dimension thereof.

The maximum chord length of the inner grid 333 is the inner width dimension Lc of the inner grid 333, and the included angle formed by the width direction of the inner grid 333 and the axis (parallel to the Y direction) of the positioning portion 31 is the inner included angle α, which includes the first inner included angle and the second inner included angle. Taking the example that the plurality of inner grating bars 333 have equal inner width dimensions, the inner angles at the first inner grating bar 3331 and the second inner grating bar 3332 are greater than zero (i.e., the corresponding first inner angles and second inner angles) along the Y direction, such that the height dimension of the first inner grating bar 3331 and the second inner grating bar 3332 along the Y direction is smaller than the inner width dimension thereof, and the height dimension of the third inner grating bar 3333 along the Y direction is equal to the inner width dimension thereof.

Note that, the inclination direction of the inner included angle α at the first inner grating 3331 and the second inner grating 3331 is different, and the inclination direction of the inner included angle α at the second inner grating 3332 is zero. Correspondingly, the outer angle β differs in the direction of inclination at the first outer grating 3321 and the second outer grating 3321, and the outer angle β is zero in the direction of inclination at the second outer grating 3322.

Illustratively, the inner width dimension of the inner grating bars 333 may be set to a value ranging from 4mm to 10mm, and the outer width dimension of the outer grating bars 332 may be set to a value ranging from 4mm to 10mm. Illustratively, the inner width dimension may be equal to the outer width dimension, such as 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, and the like, and may be flexibly set according to actual needs.

If the outer width dimension is smaller than 4mm, the bending strength of the outer grid strips 332 is low, which results in extrusion deformation between two adjacent outer grid strips 332, i.e., the gap width is increased, and the safety performance is low. If the outer width dimension is greater than 10mm, the time for air to flow through the air outlet grill 3 increases and the air outlet resistance increases.

Based on this, through setting up outward appearance degree size and interior width size to be 4~10mm, can make air-out grid 3 have better security performance, and the windage is lower.

Taking an example in which one inner grating strip is provided inside one outer grating strip 332, as shown in fig. 10, the inner edges (i.e., the lower edges in fig. 10) of two adjacent inner grating strips 333 may be defined to be spaced apart by a third radial dimension Lz in the radial direction of the grating net 33. Correspondingly, the inner edges of the two outer grid bars 332 may be arranged equally spaced apart by a third radial dimension distribution along the radial direction of the grid 33.

For example, in the annular region between the support portion 32 and the positioning portion 31, there may be provided N outer grill pieces 332 and N inner grill pieces 333, that is, a third radial dimension lz= (d 2-d 1)/N. Illustratively, according to the relevant standard, the third radial dimension may be set to have a value ranging from 8.5mm to 9.5mm, so that the grille 33 can effectively prevent foreign objects from entering the accommodating cavity 11.

With continued reference to fig. 10, along the Y direction, a ratio of the axial spacing dimension Lp of the outer grid bars 332 and the inner grid bars 333 to the third radial dimension may be set to be 0.1 to 0.2, that is, a gap width between the inner side edge of the outer grid bars 332 and the outer side edge of the inner grid bars 333 adjacently arranged in the Y direction is Lp.

If the ratio of the axial spacing dimension to the third radial dimension is less than 0.1, the air flow cannot flow out of the inner grid 333 and separate, and if the ratio of the axial spacing dimension to the third radial dimension is greater than 0.2, a larger low-speed separation area (larger resistance) is formed between the inner grid 333 and the outer grid 332. Thus, by setting the ratio of the axial interval dimension to the third radial dimension to be 0.1-0.2, for example, the axial interval dimension may be 0.85 mm-1.9 mm, so that the air may flow through the inner grid 333 and the corresponding outer grid 332 from inside to outside in sequence, and the air may be accelerated and reduced by two flow separations, with better effect.

Further, between an inner grid 333 and an outer grid 332 which are adjacently distributed in the Y direction, the outer edge of the inner grid 333 and the inner edge of the outer grid 332 are distributed with a fourth radial dimension Ld being spaced in the radial direction of the grid 33. If the maximum ratio of the fourth radial dimension to the third radial dimension is 0.2-0.3, the air can smoothly flow through the grid mesh.

Thus, by providing a fourth radial dimension between the inner and outer grid bars 333, 332 that is greater than zero, air now escapes from the wall of the inner grid bars 333 from back to front and during attachment of the wall of the outer grid bars 332. Since a plurality of fine slits (i.e., slits of a fourth radial dimension) are formed between the inner grill strip 333 and the outer grill strip 332 in the Y direction, the flow velocity increases due to the reduced flow area when the fluid flows through the slits, i.e., the air velocity on the air outlet side is advantageously increased, thereby further increasing the air output.

Since the fourth radial dimension is mainly concentrated between the first inner grille bar 3331 and the first outer grille bar 3321 and between the second inner grille bar 3332 and the second outer grille bar 3322, that is, the air flow rate of the air outlet grille 3 is faster near the inner ring region of the supporting portion 32 and near the outer ring region of the positioning portion 31, the air outlet volume is amplified more.

The axial space dimension and the fourth radial dimension are not exactly the same between the inner grid bars 333 and the outer grid bars 332 at different positions along the radial direction of the positioning portion 31.

For example, since the width directions of the third inner and outer grating strips 3333 and 3323 are disposed parallel to the Y direction, i.e., the inner and outer angles are zero, and one third inner grating strip 3333 may be aligned with one third outer grating strip 3323 in the Y direction. Based on this, the fourth radial dimension of the third inner grating 3333 and the third outer grating 3323 adjacent in the Y direction may be zero, if the inner edge of the outer grating 332 and the inner edge of the inner grating 333 are spaced apart by a dimension in the Y direction, which is equal to the sum of the long projection length of the inner width dimension Lc in the axial direction and the axial spacing dimension Lp, that is, the axial spacing dimension between the third inner grating 3333 and the third outer grating 3323 is smaller and equal in size.

At the region where the first inner and outer grating strips 3331, 3321 are provided, the fourth radial dimension is greater than zero, and the inner edge of the first outer grating strip 3321 is located radially on the side of the outer edge of the first inner grating strip 3331 near the support portion 32 so as to guide the flow direction of the air toward the parallel axis. Illustratively, at the first outer grating 3321, the larger the first outer included angle, the larger the fourth radial dimension at the corresponding location and the larger the first outer included angle, the larger the axial spacing dimension at the corresponding location may be provided.

Correspondingly, at the area where the second inner grating 3332 and the second outer grating 3322 are provided, the fourth radial dimension is greater than zero, and the inner edge of the second outer grating 3322 is located at one side of the outer edge of the second inner grating 3332 close to the positioning portion 31 along the radial direction, so as to guide the flow direction of the air to approach to the parallel axis. Illustratively, at the second outer grating 3322, the larger the second outer included angle, the larger the fourth radial dimension at the corresponding location and the larger the second outer included angle, the larger the axial spacing dimension at the corresponding location may be provided.

Taking the positioning portion 31 as a frame-shaped structure of a circular ring and the supporting portion 32 as a disc-shaped structure as an example, in an installation area between the supporting portion 32 and the positioning portion 31, 25 outer grid bars 332 of the circular ring-shaped structure are arranged at intervals of 8.5 mm-9.5 mm along a radial direction, 25 inner grid bars 333 of the inner ring-shaped structure are arranged at intervals of 8.5 mm-9.5 mm along the radial direction, and a plurality of connecting portions 331 of linear structures are distributed at intervals around the supporting portion 32 and simultaneously connect the supporting portion 32, the positioning portion 31, the inner grid bars 333 and the outer grid bars 332. The inner grid bars 333 and the outer grid bars 332 may be numbered in sequence from 1 to 25 along the radial direction of the positioning portion 31 from the positioning portion 31 to the supporting portion 32.

Based on this, the inner grid bars 333 numbered 1 to 7 are the second inner grid bars 3332. Namely, the second inner included angle of the second inner grating 3332 with the number of 1-2 is 20-28 degrees (such as 24 degrees), the second inner included angle of the second inner grating 3332 with the number of 3-4 is 16-24 degrees (such as 20 degrees), the second inner included angle of the second inner grating 3332 with the number of 5 is 14-20 degrees (such as 17 degrees), the second inner included angle of the second inner grating 3332 with the number of 6 is 6-12 degrees (such as 9 degrees), and the second inner included angle of the second inner grating 3332 with the number of 7 is 2-6 degrees (such as 4 degrees).

The outer grid strips 332 numbered 1-7 are second outer grid strips 3322. Namely, the second outer included angle of the second outer grating 3322 with the number of 1-2 is 10-14 degrees (such as 12 degrees), the second outer included angle of the second outer grating 3322 with the number of 3-4 is 8-12 degrees (such as 10 degrees), the second outer included angle of the second outer grating 3322 with the number of 5 is 7-10 degrees (such as 8.5 degrees), the second outer included angle of the second outer grating 3322 with the number of 6 is 3-6 degrees (such as 4.5 degrees), and the second outer included angle of the second outer grating 3322 with the number of 7 is 1-3 degrees (such as 2 degrees).

The inner grating 333 numbered 8-18 is the third inner grating 3332, and the inner angle is 0 °. The outer grating strips 332 numbered 8-18 are the third outer grating strips 3322, and the outer included angle is 0 °.

The inner grid bars 333 numbered 19 to 25 are first inner grid bars 3331. The first inner included angle of the first inner grating 3331 with the number 19 is 2-6 ° (e.g., 4 °), the first inner included angle of the first inner grating 3331 with the number 20 is 6-12 ° (e.g., 9 °), the first inner included angle of the first inner grating 3331 with the number 21 is 14-20 ° (e.g., 17 °), the first inner included angle of the first inner grating 3331 with the number 22-23 is 16-24 ° (e.g., 20 °), and the first inner included angle of the first inner grating 3331 with the number 24-25 is 20-28 ° (e.g., 24 °).

The outer grid 332 numbered 19-25 is the first outer grid 3321. The first outer included angle of the first outer grating 3321 with the number 19 is 2-6 ° (e.g., 4 °), the first outer included angle of the first outer grating 3321 with the number 20 is 6-12 ° (e.g., 9 °), the first outer included angle of the first outer grating 3321 with the number 21 is 14-20 ° (e.g., 17 °), the first outer included angle of the first outer grating 3321 with the number 22-23 is 16-24 ° (e.g., 20 °), and the first outer included angle of the first outer grating 3321 with the number 24-25 is 20-28 ° (e.g., 24 °).

In this way, the outdoor unit 20 provided with the improved air outlet grill 3 is subjected to simulation as a modified group, and the outdoor unit 20 in which the air outlet grill 3 without a plurality of inner grill strips is located is used as a control group.

At the same rotation speed, the whole air quantity of the outdoor unit 20 of the improved group is 4649.18m3/s, the turbulence energy at the air outlet grating 3 is 0.23J/kg, and the air speed at the outlet of the air outlet grating 3 is 3.89m/s. The total air volume of the outdoor unit 20 of the control group is 4536.00m3/s, the turbulence energy at the air outlet grating 3 is 0.27J/kg, and the air speed at the air outlet grating 3 is 3.50m/s.

The air outlet grating 3 with the multi-layer grating net 33 structure can improve the air quantity of the whole machine by 0.29 percent, and improve the average air speed at the outlet of the air outlet grating 3 by 10.96 percent, thereby reducing the wind resistance and improving the air quantity of the whole machine. The improved scheme can also reduce the turbulent energy of the air outlet grille 3 by 13.29%, which is beneficial to reducing the aerodynamic noise at the air outlet grille 3.

Through simulation, the following table is also obtained to show the parameter relation between the rotational speed and the air quantity and the noise of the stroke motor 2 of the control group and the improvement group before and after the improvement. Based on this, a graph of the broken line relation between the air volume and the noise of the control group and the modified group shown in fig. 11 can be prepared from the data in table one.

List one

The dashed line in fig. 11 is the relation between the total air volume and noise of the outdoor unit before optimization (i.e., the control group), and the solid line in fig. 11 is the relation between the total air volume and noise of the outdoor unit after optimization (i.e., the improvement group). That is, the optimized scheme can reduce the noise by about 1.5dB (A) under the same air quantity state, and the effect is obvious.

In the above embodiment, the multi-layer tandem structure grid mesh 33 is disposed inside the positioning portion 31 to achieve the effects of low wind resistance, low noise and a large air supply distance of the air outlet grid.

In order to solve the problem of high wind resistance of the air outlet grille to the fan of the air conditioner outdoor unit in the prior art, the effect of reducing wind resistance and improving the air outlet quantity can be met by technical improvement on the basis of the grille mesh 33 which is axially arranged in a single layer. As shown in fig. 12, the air outlet grill 3 includes a positioning portion 31, a supporting portion 32, and a grill net 33, the grill net 33 is installed between the positioning portion 31 and the supporting portion 32, and the grill net 33 includes a plurality of connection portions 331 and a plurality of air outlet grills 334.

In connection with fig. 6 and 12, since the mesh grid 33 shown in fig. 12 is of a single-layered structure in the axial direction, that is, the mesh grid 33 in fig. 12 corresponds to the single-layered structure in which the mesh grid 33 shown in fig. 6 is not provided with the inner mesh bars 333. Accordingly, the plurality of exit gratings 334 may be similar in structure to the plurality of outer gratings 332.

The plurality of connecting parts 331 are arranged at intervals along the circumferential direction of the positioning part 31, the first ends of the connecting parts 331 are connected with the positioning part 31, the second ends of the connecting parts 331 are positioned at the inner side of the positioning part 31, the plurality of air-out grids 334 are positioned at the inner side of the positioning part 31 and distributed at intervals, the air-out grids 334 are in cross connection with at least part of the connecting parts 331, and a grid mesh can be formed after the plurality of connecting parts 331 and the plurality of air-out grids 334 are connected.

During the process of flowing through the air outlet grille 3, part of the air can be blown out of the casing 1 from the gaps in the grille net, and part of the air can be blown onto the connection part 331 and the air outlet grille 334, so that the connection part 331 and the air outlet grille 334 form resistance to the flow of the air.

In order to reduce the resistance of the connection portion 331 and the air outlet grill 334 to the wind, as shown in fig. 13 and 14, the size of the air outlet grill 334 in the axial direction of the positioning portion 31 is a first size H1, and the size of the connection portion 331 in the axial direction of the positioning portion 31 is a second size H2. The first dimension H1 is greater than or equal to 6mm, and the ratio of the first dimension H1 and the second dimension H2 to the smallest dimension of the positioning portion 31 in the radial direction of the positioning portion 31 (dimension H3 as shown in fig. 12) is greater than or equal to 0.011 and less than or equal to 0.014.

When the axial rib 334 is in a ring-like structure, the first dimension H1 is approximately the first radial dimension d1.

For convenience of description, the smallest dimension of the positioning portion 31 in the radial direction of the positioning portion 31 may be named as a third dimension H3, and the third dimension H3 is greater than or equal to 400mm and less than or equal to 800mm.

The first dimension H1 of the air outlet grille 334 is greater than or equal to 6mm, so that the demolding requirement of the air outlet grille 3 can be ensured, on the basis, the ratio of the first dimension H1 of the air outlet grille 334 to the third dimension H3 of the positioning portion 31 is greater than or equal to 0.011 and less than or equal to 0.014, and the ratio of the second dimension H2 of the connecting portion 331 to the third dimension H3 of the positioning portion 31 is greater than or equal to 0.011 and less than or equal to 0.014. After the size of the positioning portion 31 is determined, that is, after the size of the air grill 3 is determined, the heights of the air outlet grill 334 and the connection portion 331 in the axial direction of the positioning portion 31 can be made as small as possible, so that the lengths of the slits in the grill net in the axial direction of the positioning portion 31 can be made as small as possible.

Like this, can reduce the length of the route that wind flows through from the gap in the grid net to reduce the resistance that wind received in the in-process that flows through the gap in the grid net, thereby can reduce the resistance that wind that air-conditioner off-premises station fan 2 blown out of air-outlet grid 3 produced, and then can make fan 2 just can satisfy the demand of amount of wind under lower rotational speed, with the running power of reduction fan 2, reduce the running cost of fan 2.

On this basis, in order to facilitate demolding, the second dimension H2 may be smaller than the first dimension H1, and the end of the connection portion 331 away from the fan 2 is located at a side of the end of the air outlet grating 334 away from the fan 2, which is close to the fan 2, and the end of the connection portion 331 close to the fan 2 is located at a side of the end of the air outlet grating 334 close to the fan 2, which is away from the fan 2.

For example, the second dimension H2 may be made smaller than the first dimension H1 by 0.4mm, wherein the distance between the end face of the connection portion 331 at the end far from the blower 2 and the end face of the outlet grill 334 at the end far from the blower 2 is 0.2mm, and the distance between the end face of the connection portion 331 at the end near the blower 2 and the end face of the outlet grill 334 at the end near the blower 2 is 0.2mm.

As shown in fig. 12, the supporting portion 32 may be a fixed disk structure located at the center of the positioning portion 31, such as an approximately circular fixed disk, or a fixed disk having a rectangular, positive, triangular or other shaped structure.

For example, as shown in fig. 15, the positioning portion 31 may have an elliptical ring shape, and the supporting portion 32 has an elliptical shape matching the shape of the positioning portion 31. The connecting portion 331 is arc-shaped, and the first ends of the plurality of connecting portions 331 are connected with the positioning portion 31, the second ends of the plurality of connecting portions 331 are connected with the supporting portion 32, one part of the plurality of air outlet grids 334 is a first air outlet grid 3341, and the other part is a second air outlet grid 3342.

The first outlet grill 3341 is an arcuate rib and the second outlet grill 3342 is a circular rib. And the second exit grill 3342 and the first exit grill 3341 are concentrically arranged.

The second outlet grill 3342 is connected to the plurality of connection portions 331, and a portion of the first outlet grill 3341 located outside the second outlet grill 3342 is connected to the positioning portion 31 and to the portion connection portion 331. The portion of the first outlet grill 3341 located inside the second outlet grill 3342 is connected to the support portion 32 and to the portion connection portion 331.

The third dimension H3 of the positioning portion 31 is the length of the minor axis of the positioning portion 31 in the shape of an elliptical ring, and can be regarded as the shortest connecting line length between two points of the outer edge of the positioning portion 31 and the center thereof. The diameter of the largest inscribed circle inside the positioning portion 31 is d2, and the diameter of the smallest inscribed circle of the supporting portion 32 is d1.

Illustratively, as shown in fig. 16, the positioning portion 31 is circular, and the supporting portion 32 is circular and is disposed concentrically with the positioning portion 31. The grid mesh 33 further includes a plurality of partition ribs 335, the air outlet grille 334 and the connecting portion 331 may also be considered as a part of the air outlet grille 3, one end of the partition ribs 335 is connected with the positioning portion 31, and the other end of the partition ribs 335 is connected with the supporting portion 32, so that a fan-shaped area is formed between two adjacent partition ribs 335.

The connection portion 331 is linear, one section of the air outlet grating 334 is linear, the other section is arc-shaped, and the air outlet grating 334 and the connection portions 331 are distributed in a plurality of sector areas. In a sector area, the air outlet grille 334 is cross-connected with the connecting portion 331, one end of the air outlet grille 334 is connected with the positioning portion 31, the other end of the air outlet grille 334 is connected with one partition rib 335, the first end of the connecting portion 331 is connected with the positioning portion 31, and the second end of the connecting portion 331 is connected with the other partition rib 335.

The third dimension H3 of the positioning portion 31 is a diameter of the positioning portion 31 in a circular shape.

For example, as shown in fig. 17, the positioning portion 31 is circular, the supporting portion 32 is circular and is concentric with the positioning portion 31, the connecting portion 331 is linear, and the air outlet grille 334 is circular. The air-out grilles 334 are concentrically arranged with the supporting portion 32, the air-out grilles 334 are located between the supporting portion 32 and the positioning portion 31, and the connecting portions 331 extend along the radial direction of the positioning portion 31.

Referring to fig. 17, one part of the connection portion 331 is a first connection portion 3311, the other part is a second connection portion 3312, a first end of the first connection portion 3311 is connected to the positioning portion 31, and a second end of the first connection portion 3311 is connected to the supporting portion 32. The plurality of first connection portions 3311 are arranged at intervals along the circumferential direction of the positioning portion 31, the first connection portions 3311 are connected with the plurality of air outlet grids 334, three second connection portions 3312 distributed in a delta shape are arranged between any two adjacent first connection portions 3311, and the second connection portions 3312 are connected with part of the air outlet grids 334.

For example, as shown in fig. 12, the positioning portion 31 is in a circular shape, the supporting portion 32 is in a circular shape and is concentric with the positioning portion 31, and the connecting portion 331 extends along a direction in which an inner sidewall of the positioning portion 31 is away from an outer sidewall of the positioning portion 31, that is, the connecting portion 331 is in a straight shape. The extending direction of the connecting portion 331 may be consistent with the radial direction of the positioning portion 31, or may form a certain included angle with the radial direction of the positioning portion 31, for example, the extending direction of the connecting portion 331 may be consistent with the radial direction of the positioning portion 31.

At this time, the angle (angle θ shown in fig. 18) between the extending directions of the adjacent two connection portions 331 may be made greater than or equal to 7 ° and less than or equal to 11 °. For example, the angle between the extending directions of the adjacent two connection portions 331 may be 7 °,8 °, 9 °, 10 °, 11 °, or the like.

The included angles between the extending directions of the adjacent two connecting portions 331 may be equal or different. If the included angles between the extending directions of the two adjacent connecting portions 331 may be equal, that is, the plurality of connecting portions 331 are disposed at equal intervals along the circumferential direction of the positioning portion 31.

Through making the contained angle between the extending direction of two adjacent connecting portions 331 in the above-mentioned within range, can make connecting portions 331 satisfy the support to play the style bars 334 to guarantee to go out the style bars 334 and be difficult for taking place to warp in its radial, thereby make the gap between the style bars 334 satisfy under the condition that children tried to instruct the requirement, make the quantity of connecting portions 331 relatively less, in order to avoid connecting portions 331 too much and influence the air output of style bars 3, thereby reduce the resistance of connecting portions 331 to the wind that fan 2 blows out.

The air-out grille 334 extends along the circumferential direction of the positioning portion 31 for one circle, that is, the air-out grille 334 is annular, and the plurality of air-out grille 334 may be concentrically arranged and concentric with the positioning portion 31, and the plurality of air-out grille 334 is located between the supporting portion 32 and the positioning portion 31.

Because the diameter of the air-out grille 334 near the supporting portion 32 is smaller after the air-out grille 334 is concentrically arranged, the part of the air-out grille 334 between the two adjacent connecting portions 331 has smaller size in the circumferential direction, the air-out grille 334 can meet the requirements of children on finger test at the position without arranging too many connecting portions 331 at the position, and if a plurality of supporting piece strips are connected with all the air-out grille 334, gaps between the two adjacent connecting portions 331 are smaller at the part near the supporting portion 32, so that larger resistance is caused to wind blown by the fan 2.

Therefore, the length of the partial connection portion 331 among the plurality of connection portions 331 may be made smaller than the length of the other partial connection portion 331.

Specifically, as shown in fig. 8, one part of the plurality of connection portions 331 is a third connection portion 3313, the other part is a fourth connection portion 3314, the third connection portion 3313 and the fourth connection portion 3314 extend along the radial direction of the positioning portion 31, the first end of the third connection portion 3313 and the first end of the fourth connection portion 3314 are connected to the positioning portion 31, the second end of the third connection portion 3313 is connected to the supporting portion 32, and the third connection portion 3313 is connected to the plurality of air outlet grids 334.

One fourth connection portion 3314 is located between two adjacent third connection portions 3313, and a distance from a center of the positioning portion 31 to an end face of the second end of the fourth connection portion 3314 is a first distance L that is greater than a distance from the center of the positioning portion 31 to the end face of the second end of the third connection portion 3313 (a distance L1 shown in fig. 8), that is, a length of the fourth connection portion 3314 is smaller than a length of the third connection portion 3313.

And the ratio of the first distance L to the radius of the positioning portion 31 (radius R1 as shown in fig. 8) is made to be greater than or equal to 0.55 and less than or equal to 0.7. The ratio of the first distance L to the radius of the positioning portion 31 may increase as the radius R1 of the positioning portion 31 increases.

When the radius R1 of the positioning portion 31 is determined, the first distance L is determined by the ratio, that is, the length of the fourth connecting portion 3314 can be determined, and the length of the fourth connecting portion 3314 can be relatively short under the condition of the length of the fourth connecting portion 3314, and after the fourth connecting portion 3314 and the third connecting portion 3313 cooperate to fix the axial ribs, the gap between the air bars 334 can be made to meet the child finger test requirement.

By reducing the length of the fourth connection portion 3314, the resistance of the fourth connection portion 3314 to the wind in the air outlet grill 3 can be further reduced, and the resistance of the air outlet grill 3 to the wind blown out by the blower 2 can be further reduced.

The angle θ between the extending directions of the adjacent two connecting portions 331 is the angle between the extending direction of the adjacent third connecting portion 3313 and the extending direction of the fourth connecting portion 3314.

On this basis, in order to facilitate the arrangement of the air-out gratings 334, the radial spacing between any two adjacent air-out gratings 334 may be the same as the radial spacing between the outermost air-out grating 334 and the positioning portion 31 among the plurality of air-out gratings 334.

In this way, the positional relationship between the positioning portion 31 and the positioning portion 31 can be determined by the outermost air outlet grill 334 among the plurality of air outlet grills 334 between the positioning portion 31 and the supporting portion 32. And/or, by determining the positional relationship between the outermost air-out grille 334 of the plurality of air-out grilles 334 between the second end of the fourth connecting portion 3314 and the center of the positioning portion 31 and the positioning portion 31, the position of each air-out grille 334 can be determined.

For convenience of description, the outermost air outlet grille 334 of the plurality of air outlet grills 334 between the positioning portion 31 and the supporting portion 32 may be named as a third air outlet grille 3343, and the outermost air outlet grille 334 of the plurality of air outlet grills 334 between the second end of the fourth connecting portion 3314 and the center of the positioning portion 31 may be named as a fourth air outlet grille 3344.

Specifically, as shown in fig. 18, among the plurality of air outlet grills 334 between the positioning portion 31 and the supporting portion 32, the outermost air outlet grill 334 (i.e., the third air outlet grill 3343) is connected to the plurality of connecting portions 331, and the outermost air outlet grill 334 (i.e., the third air outlet grill 3343) is connected. The portion between two adjacent connection portions 331 is a first arc-shaped section 33431.

Note that, the adjacent two connection portions 331 refer to the adjacent third connection portion 3313 and fourth connection portion 3314.

The ratio of the arc length of the first arc-shaped segment 33431 to the radius R1 of the positioning portion 31 may be greater than or equal to 0.15 and less than or equal to 0.2. The ratio of the arc length of the first arc-shaped segment 33431 to the radius R1 of the positioning portion 31 increases as the radius of the positioning portion 31 increases.

After determining the radius R1 of the positioning portion 31, the arc length of the first arc segment 33431 can be determined according to the ratio, and since the included angle between the extending directions of the two adjacent connecting portions 331 is determined, the radius of the first arc segment 33431 can be determined, that is, the radius of the third air outlet grid 3343 can be determined. The spacing between the third exit grill 3343 and the positioning portion 31 can thus be determined, and the spacing between adjacent exit grills 334 can thus be determined.

In other embodiments, among the plurality of air-out grills 334 between the second end of the fourth connecting portion 3314 and the center of the positioning portion 31, the portion of the outermost air-out grille 334 (i.e., the fourth air-out grille 3344) located between two adjacent third connecting portions 3313 is the second arc-shaped segment 33441. The ratio of the arc length of the second arc-shaped segment 33441 to the radius R1 of the positioning portion 31 is greater than or equal to 0.15 and less than or equal to 0.2. The ratio of the arc length of the second arc-shaped segment 33441 to the radius R1 of the positioning portion 31 increases as the radius R1 of the positioning portion 31 increases.

In the conventional case, in the air outlet grill 334 located between the second end of the fourth connection portion 3314 and the positioning portion 31, the innermost air outlet grill 334 is generally connected to the end of the second end of the fourth connection portion 3314. For convenience of description, an innermost one 334 of the air outlet grills 334 located between the second end of the fourth connection part 3314 and the positioning part 31 may be named as a fifth air outlet grill 3345.

Therefore, after determining the radius R1 of the positioning portion 31, the arc length of the second arc-shaped segment 33441 can be determined according to the above-mentioned ratio, and since the included angle between the extending directions of the adjacent two connecting portions 331 is determined, the included angle between the adjacent two third connecting portions 3313 can also be determined. The radius of the second arcuate segment 33441 may be determined, and the radius of the fourth exit grating 3344 may be determined, and in the case of a length determination of the fourth connection 3314, the radius of the fifth exit grating 3345 may also be determined, so that the spacing between the fourth exit grating 3344 and the fifth exit grating 3345 may be determined, and thus the spacing between adjacent exit gratings 334 may be determined.

The spacing between adjacent two of the exit louvers 334 is determined by the ratio of the arc length of the first arcuate segment 33431 to the radius of the locating portion 31 and/or the arc length of the second arcuate segment 33441 to the radius of the locating portion 31. Under the condition that the air outlet grids 3 meet the requirements of child trial instructions, the distance between the adjacent air outlet grids 334 is relatively large, so that air blown by the fan 2 can flow out of gaps between the adjacent air outlet grids 334 conveniently, and the resistance of the air outlet grids 3 to the air blown by the fan 2 is reduced.

The connection portion 331 is shown in various configurations in fig. 17 and 18, and is also applicable to the grid 33 having the multi-layered tandem structure shown in fig. 3.

In some embodiments, in the process of rotating the fan blades 22 in the fan 2, in the process of driving the air in the accommodating cavity 11 of the casing 1 to flow to the ventilation opening 12, the air generates a certain rotation along with the rotation of the fan blades 22, and the air collides with the side wall of the casing 1 and the air outlet grating 3. When air flows to the air outlet grille 3, the air quantity at different positions of the air outlet grille 3 is different, and the air outlet direction is also different, so that the air outlet quantity of the air outlet grille 3 is influenced when the radial dimensions of the air outlet grills 334 are consistent.

Based on this, the radial dimensions of the air outlet grille 334 at different positions can be adjusted according to the air quantity and the air direction at different positions of the air outlet grille 3.

Specifically, in the case where the ratio of the radius of the air-out grill 334 to the first distance L is greater than or equal to 0.28 and less than 0.44, at least a portion of the radial dimension of the air-out grill 334 gradually decreases in a direction away from the fan 2.

As shown in fig. 19, the ratio of the radius of the air outlet grill 334 to the first distance L within the above range may be designated as a sixth air outlet grill 3346. Then, the sixth outlet grille 3346 is generally located near the positioning portion 31, and an opening of an end of the sixth outlet grille 3346 near the fan 2 is smaller than an opening of an end of the sixth outlet grille 3346 far from the fan 2, so that the sixth outlet grille 3346 guides the wind flowing to the location of the sixth outlet grille 3346.

As shown in fig. 20, when the radial dimension of the sixth air outlet grill 3346 is not adjusted, the air collides with the air outlet grill 3 at the position of the sixth air outlet grill 3346, so that a larger vortex is generated, and a larger resistance is caused to the air.

As shown in fig. 21, after the sixth air outlet grating 3346 is adjusted according to the above proportion, the air is guided by the sixth air outlet grating 3346, the vortex generated by the air at the position of the sixth air outlet grating 3346 is obviously reduced, the resistance of the air is smaller and the flow velocity of the air is more stable.

In the case where the ratio of the radius of the air outlet grill 334 to the first distance L is greater than or equal to 0.44 and less than 0.78, the radial dimension of the air outlet grill 334 is constant in a direction away from the fan 2.

It should be noted that the ratio of the radius of the air outlet grille 334 to the first distance L within the above range may be named as a seventh air outlet grille 3347. The seventh outlet grill 3347 is generally located at an intermediate position between the positioning portion 31 and the supporting portion 32, and the wind flow is relatively gentle at this position, so that the radial dimension of the seventh outlet grill 3347 does not need to be changed.

In the case where the ratio of the radius of the outlet grill 334 to the first distance L is greater than or equal to 0.78, the radial dimension of at least a portion of the axial ribs increases gradually in a direction away from the fan 2.

It should be noted that the ratio of the radius of the air outlet grille 334 to the first distance L within the above range may be named as an eighth air outlet grille 3348. The eighth outlet grill 3348 is generally positioned close to the supporting portion 32, and an opening of an end of the eighth outlet grill 3348 close to the fan 2 is larger than an opening of an end of the eighth outlet grill 3348 remote from the fan 2, so that the eighth outlet grill 3348 guides the wind flowing to the position of the eighth outlet grill 3348.

As shown in fig. 22, when the radial dimension of the eighth air outlet grille 3348 is not adjusted, the air collides with the air outlet grille 3 more seriously at the position of the eighth air outlet grille 3348, and generates larger vortex at the position close to the supporting part 32, thereby causing larger resistance to the air.

As shown in fig. 23, after the eighth air outlet grating 3348 is adjusted according to the above proportion, the air is guided by the eighth air outlet grating 3348, the vortex generated by the air at the position of the eighth air outlet grating 3348 is obviously reduced, the resistance of the air is smaller and the flow velocity of the air is more stable.

It should be noted that, in the case where the ratio of the radius of the air outlet grille 334 to the first distance L is smaller than 0.28, the radius of the air outlet grille 334 is smaller than the radius of the supporting portion 32. At this time, only the support portion 32 is provided, but the air outlet grill 334 cannot be provided, and when the ratio of the radius of the air outlet grill 334 to the first distance L is equal to 0.28, the air outlet grill 334 is fixed to the peripheral wall of the support portion 32.

On this basis, in order to improve the flow guiding effect of the wind flowing to the corresponding position of the outlet grill 3 by the outlet grill 334 at each position. The projection of the axis of the air outlet grille 334 on the inner wall surface of the air outlet grille 334 can be made into a first straight line segment, that is, the radial dimension of the sixth air outlet grille 3346 uniformly decreases from the end close to the fan 2 to the end far from the fan 2, and the radial dimension of the eighth air outlet grille 3348 uniformly increases from the end close to the fan 2 to the end far from the fan 2.

Specifically, as shown in fig. 19, when the ratio of the radius of the air-out grille 334 to the first distance L is greater than or equal to 0.28 and less than 0.44, an included angle c1=75-160 x (R/L) between the extension line of the first straight line segment and the axis of the air-out grille 334, where R is the radius of the air-out grille 334 and L is the first distance.

In this case, the first straight line segment is a projection of the axis of the sixth outlet grill 3346 on the inner wall surface of the sixth outlet grill 3346.

In the case where the ratio of the radius of the exit grill 334 to the first distance L is greater than or equal to 0.78, the angle c2=50-64 (R/L) between the extension of the first straight line segment and the axis of the exit grill 334.

In this case, the first straight line segment is a projection of the axis of the eighth outlet grill 3348 on the inner wall surface of the eighth outlet grill 3348.

The radial dimension of the sixth air outlet grating 3346 and the radial dimension of the eighth air outlet grating 3348 calculated by the above formula can better guide the wind flowing to the corresponding position of the air outlet grating 3, so that the resistance of the air outlet grating 3 to the wind blown by the fan 2 is reduced to a greater extent.

As shown in fig. 6 and 19, the sixth outlet grill 3346 has the same structure as the first outer grill 3321, the seventh outlet grill 3347 has the same structure as the third outer grill 3323, and the eighth outlet grill 3348 has the same structure as the second outer grill 3322. The grill net 33 formed by the three kinds of air outlet grills 334 between the positioning portion 31 and the supporting portion 32 in the embodiment shown in fig. 19 corresponds to the grill net 33 formed by only the outer grill pieces 332 and the connecting portion 331 in the embodiment shown in fig. 6.

Correspondingly, the inclination direction and the inclination angle of the included angle C2 may refer to the arrangement scheme of the first external included angle β1 shown in fig. 7, and the inclination direction and the inclination angle of the included angle C1 may refer to the arrangement scheme of the second external included angle β2 shown in fig. 8. And the width direction and the Y direction of the seventh air outlet grille can be arranged in parallel, namely the inclined included angle is zero.

In some embodiments, in order to enable the connection 331 to also guide the wind flowing onto the air outlet grille 3. As shown in fig. 24 and 25, the side surfaces of the adjacent two connecting portions 331 close to each other are air guiding surfaces 3315, and the air guiding surfaces 3315 are perpendicular to the end surfaces of the positioning portions 31, and this is suitable for the case where the rotation speed of the fan 2 is low.

Or the air guide surface 3315 includes a first side edge 33151 and a second side edge 33152. In the axial direction (i.e., Y direction) of the positioning portion 31, the second side 33152 is located on a side of the first side 33151 away from the fan 2, and the second side 33152 is located on a side of the first side 33151 in the rotational direction (direction X in fig. 25) of the fan 2.

That is, the air guiding surface 3315 makes a certain angle (angle γ1 shown in fig. 25) with the end surface of the positioning portion 31, and the inclined direction of the air guiding surface 3315 with respect to the positioning portion 31 is suitable for guiding the air blown out by the fan 2. Specifically, the included angle γ1 between the air guiding surface 3315 and the end surface of the positioning portion 31 is greater than or equal to 80 ° and less than 90 °, for example, the included angle between the air guiding surface 3315 and the end surface of the positioning portion 31 may be 80 °, 82 °, 84 °, 85 °, 86 °, 89 °, or the like.

The included angle between the air guiding surface 3315 and the end surface of the positioning portion 31 is in the above range, so that the air guiding surface 3315 is more beneficial to guiding the air blown out by the fan 2, and the resistance of the air outlet grille 3 to the air blown out by the fan 2 is reduced.

In some embodiments, wind energy flowing to the edge position of the air outlet grille 3 flows through the air outlet grille 3 quickly. As shown in fig. 24, the dimension of the positioning portion 31 in the axial direction thereof may be made to be a fourth dimension H4, the fourth dimension H4 being 5mm or more and 60mm or less, and for example, the fourth dimension H4 may be 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, or the like.

Too small a fourth dimension H4 of the positioning portion 31 will increase the difficulty of producing the positioning portion 31 and reduce the strength of the positioning portion 31, so that the positioning portion 31 is easily damaged during use.

Since the grid mesh is generally fixed at one end of the positioning portion 31 away from the fan 2, the fourth dimension H4 of the positioning portion 31 is greater than 60mm, which results in an excessive distance between the grid mesh and the fan 2, so that wind is excessively dispersed after blowing onto the grid mesh, which results in larger resistance to the wind and larger wind loss.

The fourth dimension H4 of the positioning portion 31 is within the above range, and the resistance of the positioning portion 31 to wind can be made relatively small.

On this basis, as shown in fig. 7 and 26, a plurality of through holes 311 may be provided on the outer side wall of the positioning portion 31 at intervals so that the wind flowing to the edge of the outlet grill 3 flows out through the through holes 311 on the positioning portion 31 to further reduce the resistance of the positioning portion 31 to the wind blown out by the blower fan 2.

Specifically, the ratio of the maximum dimension of the through hole 311 in the axial direction of the positioning portion 31 (dimension L2 as shown in fig. 26) to the radius R1 of the positioning portion 31 may be made greater than or equal to 0.023 and less than or equal to 0.027, and the ratio of the maximum dimension of the through hole 311 in the circumferential direction of the positioning portion 31 (dimension L3 as shown in fig. 26) to the radius R1 of the positioning portion 31 may be made greater than or equal to 0.09 and less than or equal to 0.1.

It should be noted that the through hole 311 may be a round hole, an elliptical hole, a rectangular hole, a square hole, an irregularly shaped hole, a wavy hole, or the like.

The through holes 311 are wavy holes, and the wavy holes can enable the areas of the through holes 311 to be larger, so that wind can flow out of the through holes 311 more conveniently. Or the through hole 311 can be a rectangular hole or a square hole, and the structure is simple.

As shown in fig. 27, in the case where the through hole 311 is not formed in the outer wall of the positioning portion 31. The wind flowing to the location portion 31 is blocked by the location portion 31, and thus impacts with the location portion 31 and the wind outlet grill 334 and the connection portion 331 near the location portion 31, to influence the flow rate of the wind thereat, thereby causing resistance to the flow of the wind thereat.

As shown in fig. 28, after the through hole 311 is formed in the positioning portion 31, the impact of the wind flowing to the positioning portion 31 with the positioning portion 31 and the wind outlet grille 334 and the connection portion 331 near the positioning portion 31 is significantly reduced. The flow velocity of the wind is also improved at this point, and the resistance of the positioning portion 31 to the wind is reduced.

In some embodiments, as shown in fig. 1, the outdoor unit 20 further includes a wind-guiding ring 4, and the wind-guiding ring 4 is disposed in the accommodating cavity 11 and located at the ventilation opening 12. The wind guiding ring 4 is connected with the casing 1 and extends for a circle along the circumference of the ventilation opening 12, and the wind guiding ring 4 is used for guiding wind blown out by the fan 2 to the ventilation opening 12 and the air outlet grating 3 so that the wind flows out of the ventilation opening 12 and the air outlet grating 3 to the outside of the casing 1.

In order to smoothly guide the wind blown by the fan 2 to the air outlet grating 3 by the wind guide ring 4 and reduce the influence of the wind guide ring 4 on the wind blown by the fan 2. As shown in fig. 29, the minimum radial dimension of the air guide ring 4 may be made the fifth dimension H5, and the ratio of the third dimension H3 (the minimum dimension of the positioning portion 31 in the radial direction thereof) to the fifth dimension H5 may be made greater than or equal to 1 and less than or equal to 1.25.

The positioning portion 31 is located at the edge of the outlet grill 3, and the smallest radial dimension of the annular grill is the smallest radial dimension of the outlet grill 3.

The ratio of the third dimension H3 to the fifth dimension H5 is within the above range, and the third dimension H3 of the positioning portion 31 is larger than the fifth dimension H5 of the air guide ring 4. Therefore, the wind generated by the fan 2 can directly reach the air outlet grille 3 in the process of being guided by the air guide ring 4 to blow to the air outlet grille 3, and the wind is not blocked by the air guide ring 4 or the casing 1 before reaching the air outlet grille 3.

At the same time, the third dimension H3 is increased relative to the fifth dimension H5, so that the wind originally blown onto the air-out grille 3 near the positioning portion 31, part of which is blown onto the grille net of the air-out grille 3, and is blown out of the casing 1 through the slits on the grille net. The resistance of the positioning portion 31 to the wind can be further reduced, and the resistance of the outlet grill 3 to the wind blown out by the blower 2 can be further reduced.

It will be appreciated that the third dimension H3 increases and that the fifth dimension H5 does not change, the third dimension H3 increases relative to the fifth dimension H5. The coverage area of the wind blown from the wind guide ring 4 to the air outlet grille 3 is unchanged, the area of the air outlet grille 3 is increased, and the wind originally blown to the air outlet grille 3 near the positioning part 31 is blown on the grille net and is blown out of the casing 1 through the gaps of the grille net. Thereby further reducing the resistance of the positioning portion 31 to the wind so as to further reduce the resistance of the outlet grill 3 to the wind blown out by the blower 2.

The third dimension H3 is unchanged and the fifth dimension H5 decreases, the third dimension H3 increases relative to the fifth dimension H5. The coverage area of the wind blown from the wind guide ring 4 to the wind outlet grille 3 is reduced, the area of the wind outlet grille 3 is unchanged, and the wind originally blown to the wind outlet grille 3 near the positioning part 31 is blown on the grille net and is blown out of the casing 1 through the gaps of the grille net. Thereby further reducing the resistance of the positioning portion 31 to the wind so as to further reduce the resistance of the outlet grill 3 to the wind blown out by the blower 2.

When the third dimension H3 increases and the fifth dimension H5 decreases, the third dimension H3 increases relative to the fifth dimension H5. The coverage area of the wind blown from the wind guide ring 4 to the wind outlet grille 3 is reduced, the area of the wind outlet grille 3 is increased, and the wind originally blown to the wind outlet grille 3 near the positioning part 31 is blown on the grille net and is blown out of the casing 1 through the gaps of the grille net. Thereby further reducing the resistance of the positioning portion 31 to the wind so as to further reduce the resistance of the outlet grill 3 to the wind blown out by the blower 2.

As shown in the following table two, the dimensional relationship between the air guide ring 4 and the positioning portion 31 was simulated, and when the air volume of the air conditioner outdoor unit was 4626m3/h, the rotation speed of the fan 2 in the case of the scheme 1 was 681rpm, and the rotation speed of the fan 2 in the case of the scheme 2 was 634rpm. To achieve the same air volume (4626 m 3/h), the fan 2 rotation speed required in scheme 2 is 47rpm lower than that required in scheme 1.

Meanwhile, the noise generated by the air conditioner outdoor unit of the scheme 1 is 56.8dB, the noise generated by the air conditioner outdoor unit of the scheme 2 is 54.7dB, and the noise generated by the air conditioner outdoor unit of the scheme 2 is 2.1dB lower than the noise generated by the air conditioner outdoor unit of the scheme 1.

In the scheme 1, the fifth dimension H5 of the air guiding ring 4 is 616mm, the third dimension H3 of the positioning portion 31 is 630mm, the diameter of the largest circle formed by the rotation of the fan blades 22 of the fan 2 is the first diameter R2, the first diameter R2 is 600mm, and the dimension of the positioning portion 31 in the axial direction (i.e., the fourth dimension H4) is 30mm.

The fifth dimension H5, the first diameter R2, and the fourth dimension H4 in the case 2 are identical to the case 1, the third dimension H3 is 670mm, 40mm greater than the third dimension H3 in the case 1, and the ratio of the third dimension H3 to the fifth dimension H5 in the case 2 is 0.065 greater than the ratio of the third dimension H3 to the fifth dimension H5 in the case 1.

From the simulation results, the diffusion range of the wind blown out of the wind guide ring 4 is unchanged. The third dimension H3 of the positioning portion 31 is increased relative to the fourth dimension H4 of the air guide ring 4, so that the air quantity loss caused by the air outlet grille 3 can be reduced, and when the air conditioner outdoor unit reaches the same air quantity, the required rotation speed of the fan 2 is lower, and the generated noise is lower.

It can be understood that after the wind generated by the fan 2 is guided to the air outlet grating 3 through the wind guide ring 4, the resistance of the air outlet grating 3 is reduced, and the loss of the wind quantity is reduced. The air quantity of the air conditioner outdoor unit is improved, so that the heat exchange efficiency of the air conditioner outdoor unit is improved.

Watch II

After the relationship between the radial minimum dimension of the positioning part 31 of the air conditioner outdoor unit and the radial minimum dimension of the air guide ring 4 is improved, compared with the air conditioner outdoor unit which is not improved, the improved air conditioner outdoor unit has smaller air loss, the same air quantity is obtained, and the rotating speed of the fan 2 is lower. Therefore, when the air conditioner outdoor unit obtains the same air quantity and the same heat exchange efficiency, noise is reduced. The noise of the air conditioner outdoor unit is reduced while the air quantity is improved, and the experience effect of a user on the air conditioner outdoor unit is improved.

When the ratio of the third dimension H3 to the fifth dimension H5 is smaller than 1, that is, the minimum dimension of the positioning portion 31 in the radial direction thereof is smaller than the minimum radial dimension of the air guiding ring 4, the positioning portion 31 is disposed at the air vent 12, and the size of the air vent 12 matches with that of the positioning portion 31. Thus, the smallest dimension of the ventilation opening 12 in its radial direction is also smaller than the smallest dimension of the wind deflector 4.

During the process of flowing to the air outlet grille 3, part of the air blown by the fan 2 is blown onto the inner wall of the accommodating cavity 11 of the casing 1, and the other part is blown onto the air outlet grille 3. The air blown onto the inner wall of the housing chamber 11 of the casing 1 cannot be blown out through the casing 1, and the resistance to the air blown out by the fan 2 increases, which results in an increase in the air volume loss and a decrease in the air volume.

When the ratio of the third dimension H3 to the fifth dimension H5 is greater than 1.25, that is, the minimum dimension of the positioning portion 31 in the radial direction thereof is greater than the minimum radial dimension of the air guiding ring 4. With the increase of the minimum radial dimension of the positioning part 31 relative to the minimum radial dimension of the air guide ring 4 in the radial direction, the air quantity blown out from the gaps on the grid net of the air outlet grid 3 can be no longer increased, the air quantity blown to the position of the air outlet grid 3 close to the positioning part 31 is no longer reduced, and no obvious effect is caused on reducing the resistance of the air outlet grid 3 to the air. And, the production cost of the air outlet grill 3 increases and the strength thereof decreases.

In some embodiments, as shown in fig. 30, when the ratio of the third dimension H3 to the fifth dimension H5 is greater than or equal to 1.05 and less than or equal to 1.15, the air volume blown by the fan 2 onto the air outlet grill 3 increases exponentially. Therefore, after wind generated by the fan 2 is guided to the air outlet grille 3 through the air guide ring 4, the resistance reduction effect of the air outlet grille 3 is more obvious, and the resistance of the air outlet grille 3 to the wind blown out by the fan 2 is reduced on the premise of controlling the production cost and guaranteeing the strength of the air outlet grille 3.

In some embodiments, as shown in fig. 29, a ratio of the fifth dimension H5 (the minimum radial dimension of the air guiding ring 4) to the first diameter R2 (the diameter of the largest circle formed by the rotation of the blades 22 of the fan 2) is greater than or equal to 1.02 and less than or equal to 1.1, and a difference between the fifth dimension H5 and the first diameter R2 is greater than or equal to 12mm.

The ratio of the fifth dimension H5 to the first diameter R2 is greater than or equal to 1.02, and the difference between the fifth dimension H5 and the first diameter R2 is greater than or equal to 12mm. The diameter of the largest circle formed by the rotation of the fan blades 22 is slightly smaller than the minimum radial dimension of the air guide ring 4, so that the assembly requirement of the fan blades 22 can be met, the fan blades 22 can be arranged in the air guide ring 4, and the fan blades 22 can not collide with the air guide ring 4 during operation.

The ratio of the fifth dimension H5 to the first diameter R2 is less than or equal to 1.1, the diameter of the largest circle formed by the rotation of the fan blades 22 is smaller than the smallest radial dimension of the air guiding ring 4, and the dimension difference between the two dimensions ensures that the wind generated by the fan blades 22 is not excessively dispersed in the air guiding ring 4. Therefore, the wind generated by the fan blades 22, the wind guide ring 4, the machine shell 1 and the air outlet grille 3 can not generate excessive collision, the resistance of the wind generated by the fan 2 is smaller, and the air quantity loss is smaller.

When the ratio of the fifth dimension H5 to the first diameter R2 is smaller than 1.02, the assembly requirement of the fan blade 22 cannot be satisfied, and the fan blade 22 cannot be installed in the air guide ring 4.

When the ratio of the fifth dimension H5 to the first diameter R2 is greater than 1.1, the diameter of the largest circle formed by the rotation of the fan blades 22 is smaller than the smallest radial dimension of the air guiding ring 4, and the dimension difference between the two causes the wind generated by the fan blades 22 to be excessively dispersed in the air guiding ring 4. Thereby, the wind generated by the fan blades 22 collides with the wind guide ring 4, the machine shell 1 and the air outlet grating 3 too much, the resistance of the wind generated by the fan 2 is increased, and the air quantity loss is increased.

In some embodiments, as shown in fig. 29 and 31, the wind-guiding ring 4 has a first portion 41 and a second portion 42 that are connected together. The first portion 41 is connected to the casing 1, and the second portion 42 is located on a side of the first portion 41 away from the casing 1 in the Y direction (i.e., axial direction), and the radial dimension of the first portion 41 gradually decreases in a direction from the first portion 41 toward the second portion 42.

The first part 41 of the wind guiding ring 4 plays a role in guiding wind blown out by the fan 2, so that the wind can be blown out towards the air outlet grille 3 along the inner periphery of the first part 41, the collision between the wind and the wind guiding ring 4 is reduced, the resistance of the wind is further reduced, and the air quantity of the air conditioner outdoor unit is improved.

In some embodiments, when the dimension of the first portion 41 in the axial direction of the ventilation opening 12 (dimension M shown in fig. 31) is greater than 0 and less than or equal to 20mm, the first portion 41 makes the air blown by the fan 2 blow away from the air outlet grille 3 along the inner periphery of the first portion 41, so that the collision between the air and the air guide ring 4 is reduced, the resistance to the air is further reduced, and the air quantity of the air conditioner outdoor unit is improved. And the wind blown by the fan 2 is not excessively dispersed after being guided by the first part 41, and the wind quantity of the wind blown to the position, close to the positioning part 31, of the wind outlet grille 3 is not increased, so that the resistance of the wind outlet grille 3 to the wind is not increased, and the loss of the wind quantity is not increased.

When the dimension of the first portion 41 in the axial direction of the ventilation opening 12 (dimension M as shown in fig. 31) is greater than 20mm, the first portion 41 may excessively disperse the wind blown out by the blower 2 after being guided through the first portion 41. The amount of air blown toward the air outlet grill 3 near the positioning portion 31 increases, and the resistance of the air outlet grill 3 to the air increases, thereby increasing the air loss.

In some embodiments, as shown in fig. 31, the first portion 41 of the air guide ring 4 encloses a circumference at the vent 12, and an angle (angle γ2 as shown in fig. 31) between a normal line of the inner circumferential surface of the first portion 41 and the axis of the vent 12 is greater than or equal to 75 ° and less than or equal to 90 °. For example, the angle γ2 of the normal line of the inner peripheral surface of the first portion 41 and the axis of the vent 12 may be 75 °, 80 °, 85 °, 90 °, or the like.

The first part 41 enables the wind blown by the fan 2 to blow towards the air outlet grille 3 along the inner peripheral surface of the first part 41, so that collision between the wind and the wind guide ring 4 is reduced, resistance to the wind is further reduced, and the air quantity of the air conditioner outdoor unit is improved. And can not make fan 2 blow out the wind and excessively disperse after first portion 41 guides, can not lead to the wind to blow out the amount of wind increase that air grille 3 is close to location portion 31 department, can not make air grille 3 to the resistance increase of wind to can not increase the loss of amount of wind.

When the angle γ2 between the normal line of the inner peripheral surface of the first portion 41 and the axis of the ventilation opening 12 is smaller than 75 °, the first portion 41 will cause the air blown by the fan 2 to be excessively dispersed after being guided by the first portion 41, so that the air volume of the air blown to the air outlet grille 3 near the positioning portion 31 increases, the resistance of the air outlet grille 3 to the air increases, and the air volume loss increases.

When the angle γ2 between the normal line of the inner peripheral surface of the first portion 41 and the axis of the ventilation opening 12 is 90 °, the inner peripheral surface of the first portion 41 extends along the axis of the ventilation opening 12 in a direction away from the accommodating chamber 11, the inner peripheral surface of the first portion 41 loses the effect of guiding the wind to spread, and the wind blows onto the wind guide ring 4 and collides with the wind guide ring 4, so that the wind is subjected to the resistance of the wind guide ring 4, and the loss of the air volume of the air conditioner outdoor unit is increased, that is, the air volume is reduced.

When the angle γ2 between the normal line of the inner peripheral surface of the first portion 41 and the axis of the vent 12 is greater than 90 °, the radial dimension of the first portion 41 gradually increases in the direction from the first portion 41 toward the second portion 42. The inner peripheral surface of the first portion 41 concentrates the central axis of the wind direction ventilation opening 12 blown out by the fan 2, and the inner peripheral surface of the first portion 41 blocks the wind blown out by the fan 2, so that the resistance of the wind guide ring 4 to the wind increases, the wind loss increases, and the wind volume decreases.

In some embodiments, the smallest radial dimension of the second portion 42 is the smallest radial dimension of the wind deflector 4.

In some embodiments, as shown in fig. 31, the cabinet 1 includes a panel 13, and the panel 13 includes a first plate 131, a second plate 132, and a third plate 133 connected in sequence in a radial direction of the vent 12. The first plate 131 surrounds the second plate 132, the second plate 132 surrounds the third plate 133, the third plate 133 is located at one side of the first plate 131 facing the accommodating cavity 11, and the ventilation opening 12 is formed in the third plate 133.

The third plate 133 is located at a side of the first plate 131 facing the accommodating cavity 11, so that when the air outlet grille 3 is installed at the air vent 12, the dimension of the air conditioner outdoor unit in the axial direction of the air vent 12 is smaller than the sum of the dimension of the positioning portion 31 and the dimension of the casing 1 in the axial direction of the air vent 12, and the requirement of the air conditioner outdoor unit for small-volume design is met.

Although the application is described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air conditioner with a grille, comprising an outdoor unit, characterized in that it comprises:

A housing, wherein a receiving cavity is formed inside the housing, and a vent is formed on a side wall of the housing;

A fan is located in the accommodating cavity, and the vent is located at the air outlet side of the fan;

and an air outlet grille, the air outlet grille comprising:

A positioning part, which is a frame-shaped structure, is disposed close to the vent and connected to the housing;

A supporting portion, located inside the positioning portion;

and a grille net, the grille net being used for circulating air and comprising:

A plurality of connecting parts, which are strip-shaped structures, are located between the supporting part and the positioning part and are spaced around the supporting part, and the supporting part is connected to the positioning part through at least part of the connecting parts;

A plurality of outer grille bars are located between the positioning portion and the supporting portion and are spaced apart along the radial direction of the positioning portion, and the plurality of outer grille bars are cross-connected with at least a portion of the connecting portion;

and a plurality of inner grille bars, which are located on the air inlet side of the outer grille bars close to the fan and spaced apart from the outer grille bars along the axial direction of the air outlet grille.

2. The air conditioner with grille according to claim 1, characterized in that the plurality of inner grille bars comprise:

A plurality of first inner grille bars, along the radial direction of the positioning portion, the plurality of first inner grille bars are arranged close to the support portion and are spaced apart; along the axial direction of the positioning portion, the first inner grille bars are arranged away from the outer edge of the fan and are inclined at a first inner angle along the radial direction of the positioning portion toward a direction close to the support portion;

And a plurality of second inner grille bars, along the radial direction of the positioning portion, the plurality of second inner grille bars are arranged close to the positioning portion and distributed at intervals; along the axial direction of the positioning portion, the second inner grille bars are arranged away from the outer edge of the fan and inclined at a second inner angle along the radial direction of the positioning portion toward a direction away from the support portion.

3. The air conditioner with grille according to claim 2, characterized in that the plurality of outer grille bars comprise:

A plurality of first outer grille bars, wherein the plurality of first outer grille bars are arranged close to the support portion and spaced apart along the radial direction of the positioning portion, and one of the first outer grille bars is spaced apart along the axial direction of the positioning portion on the outer side of one of the first inner grille bars; along the axial direction of the positioning portion, the outer edges of the first outer grille bars are arranged at a first outer angle along the radial direction of the positioning portion toward a direction close to the support portion;

And a plurality of second outer grille bars, along the radial direction of the positioning portion, a plurality of the second outer grille bars are arranged close to the positioning portion and are distributed at intervals, and one of the second outer grille bars is arranged at an interval along the axial direction of the positioning portion on the side of one of the second inner grille bars away from the fan; along the axial direction of the positioning portion, the air outlet side of the second outer grille bar is inclined at a second outer angle along the radial direction of the positioning portion toward a direction away from the support portion.

4. The air conditioner with a grille according to claim 3, characterized in that, along the axial direction of the positioning portion, at one of the first inner grille bars and one of the first outer grille bars arranged adjacently, the ratio of the first outer angle to the first inner angle is 0.4 to 0.5 or 0.5 to 0.6; and/or,

Along the axial direction of the positioning portion, at a second inner grille bar and a second outer grille bar that are adjacently arranged, a ratio of the second outer angle to the second inner angle is 0.4 to 0.5 or 0.5 to 0.6.

5. The air conditioner with a grille according to claim 2, characterized in that, along the radial direction of the positioning portion, the first inner angle of the first inner grille bar away from the support portion is less than or equal to the first inner angle of the first inner grille bar close to the support portion; and/or

Along the radial direction of the positioning portion, the second inner angle of the second inner grille bars away from the positioning portion is less than or equal to the second inner angle of the second inner grille bars close to the supporting portion; and/or,

The first inner angle is greater than 0° and less than or equal to 30°; and/or,

The second inner angle is greater than 0° and less than or equal to 30°.

6. The air conditioner with grille according to claim 3, characterized in that the plurality of inner grille bars further comprise:

A plurality of third inner grille bars, wherein the plurality of third inner grille bars are located between the first inner grille bars and the second inner grille bars along the radial direction of the positioning portion, and the plurality of third inner grille bars are arranged at intervals; the third inner grille bars are arranged perpendicular to the radial direction of the positioning portion;

The plurality of outer grille bars further include:

A plurality of third outer grille bars are provided, wherein the plurality of third outer grille bars are located between the first outer grille bars and the second outer grille bars along the radial direction of the positioning portion, and the plurality of third outer grille bars are arranged at intervals; the third outer grille bars are arranged perpendicular to the radial direction of the positioning portion, and one of the third inner grille bars is aligned with one of the third outer grille bars along the axial direction of the positioning portion and arranged at intervals.

7. The air conditioner with grilles according to claim 6, characterized in that the plurality of first outer grille bars, the plurality of second outer grille bars and the plurality of third outer grille bars are at least annular structures;

Along the radial direction of the positioning portion, the maximum ratio of the difference between the diameter dimension of the first outer grid bar and the first radial dimension to the difference between the second radial dimension and the first radial dimension is 0.2 to 0.3;

Along the radial direction of the positioning portion, the minimum ratio of the difference between the diameter of the second outer grid bar and the first radial dimension to the difference between the second radial dimension and the first radial dimension is 0.7 to 0.8;

The first radial dimension is the diameter dimension of the minimum circumscribed circle of the support portion, and the second radial dimension is the diameter dimension of the maximum inscribed circle inside the positioning portion.

8. The air conditioner with a grille according to any one of claims 1 to 7, characterized in that, along the radial direction of the air outlet grille, the inner edges of two adjacent outer grille bars are spaced apart by a third radial dimension;

Along the axial direction of the air outlet grille, the ratio of the axial spacing dimension between the outer grille bars and the inner grille bars to the third radial dimension is 0.1 to 0.2; and/or,

Along the axial direction of the air outlet grille, an inner grille bar is adjacent to an outer grille bar and is arranged at intervals, the inner grille bar is away from the outer edge of the fan, and is spaced apart from the inner edge of the outer grille bar close to the fan by a fourth radial dimension in the radial direction of the grille net; the maximum ratio of the fourth radial dimension to the third radial dimension is 0.2 to 0.3.

9. An air conditioner with a grille according to any one of claims 1 to 7, characterized in that along the axial direction of the air outlet grille, at least part of the connecting portion is located on the inner side of the outer grille bar close to the fan, and one of the connecting portions supports and connects the inner edge of the outer grille bar and the inner grille bar.

10. An air conditioner provided with a grille, comprising an outdoor unit, characterized in that it comprises:

and an air outlet grille, the air outlet grille comprising:

and a grille net, wherein the grille net is located at the inner side of the positioning portion and connected to the positioning portion, and the grille net is a multi-layer serial structure distributed at intervals along the axial direction of the air outlet grille, and is used for circulating air.