CN112901487B

CN112901487B - Scroll assembly, scroll compressor and air conditioner

Info

Publication number: CN112901487B
Application number: CN202110338891.1A
Authority: CN
Inventors: 谭琴; 江波; 杨志鹏; 罗承卓; 胡超奇; 宋红飞
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2025-05-09
Anticipated expiration: 2041-03-30
Also published as: CN112901487A

Abstract

The application relates to the technical field of compressors, and provides a scroll assembly, a scroll compressor and an air conditioner. The scroll plate assembly comprises a fixed scroll plate, wherein an air inlet hole, an air outlet hole and an oil injection channel are formed in the fixed scroll plate, an movable scroll plate is meshed with the fixed scroll plate and forms a working chamber with the fixed scroll plate, an oil injection groove communicated with a back pressure chamber of a scroll compressor is formed in the movable scroll plate, the movable scroll plate is configured to translate relative to the fixed scroll plate so as to compress gas entering the working chamber, and the oil injection channel is intermittently communicated with the oil injection groove and the working chamber so that oil in the back pressure chamber is intermittently injected into the working chamber under the action of pressure difference between the back pressure chamber and the working chamber. According to the technical scheme, the leakage of the gas in the working chamber to the back pressure chamber can be effectively prevented, so that the flow loss of the gas is reduced in the working process of the scroll assembly, and the improvement of the energy efficiency of the scroll compressor is facilitated.

Description

Vortex plate assembly, vortex compressor and air conditioner

Technical Field

The application relates to the technical field of compressors, in particular to a vortex plate assembly, a vortex compressor and an air conditioner.

Background

At present, the pressure of a back pressure cavity of the scroll compressor is intermediate pressure, the movable scroll clings to the fixed scroll under the action of the pressure of the back pressure cavity, if the pressure of the back pressure cavity is too high, friction loss of the joint surface of the movable scroll and the fixed scroll is increased, power is increased, if the pressure of the back pressure cavity is too low, the movable scroll cannot be stably jointed with the fixed scroll, the movable scroll is prone to overturning, and air leakage occurs, so that the working capacity of the scroll compressor is reduced. In the prior art, by arranging a back pressure hole in the working chamber, the back pressure hole is communicated with the back pressure chamber, so that the back pressure chamber has an intermediate pressure higher than the suction pressure. However, in this scheme, because the working chamber pressure changes along with the operation of the fixed scroll, when the working chamber pressure in back pressure hole department is higher, the gas of working chamber gets into back pressure intracavity through the back pressure hole easily, and when the working chamber pressure in back pressure hole department is lower, the gas gets into the working chamber through the back pressure hole again easily to cause the flow loss of gas, influence scroll compressor's energy efficiency.

Disclosure of Invention

According to embodiments of the present application, it is intended to improve at least one of technical problems existing in the prior art or related art.

To this end, it is an object of an embodiment according to the present application to provide a scroll assembly.

It is another object of an embodiment according to the present application to provide a scroll compressor.

It is a further object of an embodiment according to the present application to provide an air conditioner.

In order to achieve the above object, according to an embodiment of the first aspect of the present application, there is provided a scroll assembly including a fixed scroll having an air inlet hole, an air outlet hole and an oil injection passage, a movable scroll engaged with the fixed scroll and forming a working chamber with the fixed scroll, the movable scroll having an oil injection groove communicating with a back pressure chamber of a scroll compressor, the movable scroll being configured to translate with respect to the fixed scroll to compress gas entering the working chamber, wherein the oil injection passage is intermittently communicated with the oil injection groove and the working chamber to intermittently inject oil in the back pressure chamber into the working chamber under a pressure difference between the back pressure chamber and the working chamber.

According to an embodiment of the first aspect of the present application, a scroll assembly including a fixed scroll and an orbiting scroll may be used in a scroll compressor. The movable vortex plate and the fixed vortex plate are meshed with each other and form a working chamber between the movable vortex plate and the fixed vortex plate, and the movable vortex plate can translate relative to the fixed vortex plate. The air inlet and the air outlet are arranged on the fixed scroll, so that air can enter the working chamber through the air inlet, the structural state of the working chamber is changed in the operation process of the movable scroll, the air is compressed, and the compressed air is discharged to the air outlet chamber of the scroll compressor through the air outlet.

Through set up the oiling passageway on quiet vortex dish, correspondingly, set up the oil filler groove on moving vortex dish, and the oil filler groove can be with scroll compressor's back pressure cavity intercommunication, in moving vortex dish's operation in-process, the oil filler groove can be intermittent type nature with oiling passageway and working chamber intercommunication, and utilize the pressure differential between working chamber and the back pressure cavity, the fluid in the back pressure cavity of drive flows into in the working chamber through oil filler groove and oiling passageway, when lubricated the faying surface between moving vortex dish and the quiet vortex dish, and seal the gap in the working chamber, gas in the working chamber is to back pressure cavity leakage, simultaneously, when oil filler groove and oiling passageway and working chamber are in the state of disconnection intercommunication, can prevent that the gas in the back pressure cavity from entering the working chamber through oiling passageway, realize intermittent type oiling, thereby reduce gaseous flow loss in vortex dish subassembly working process, be favorable to promoting scroll compressor and improve the efficiency.

In addition, there is a fine gap in the contact surface between the movable scroll and the fixed scroll of the scroll compressor, and in general, gas flows into or out of the working chamber under pressure, resulting in a loss of gas flow. The pressure of the back pressure chamber of the scroll compressor is typically between suction and discharge pressures, and oil in the oil storage space of the scroll compressor can enter the back pressure chamber under pressure to provide oil to the working chamber.

In addition, the scroll assembly in the technical scheme provided in the embodiment of the application can also have the following additional technical characteristics:

In the technical scheme, when the pressure of the working chamber is larger than that of the back pressure chamber, the oiling channel is disconnected from the oiling groove and the working chamber, and when the pressure of the working chamber is smaller than that of the back pressure chamber, the oiling channel is communicated with the oiling groove and the working chamber.

In this technical scheme, along with the pressure variation in the working chamber, oiling passageway and oil groove and working chamber alternate connection and disconnection. When the pressure of the working chamber is smaller than that of the back pressure chamber, the oil injection channel is communicated with the oil injection groove and the working chamber, at the moment, a pressure difference is formed between the back pressure chamber and the working chamber, oil in the back pressure chamber enters the working chamber through the oil injection groove and the oil injection channel under the action of pressure, so that gaps of the working chamber are sealed, and gas is prevented from leaking to the back pressure chamber through the gaps. The arrangement can reduce the gas flow loss caused by the gap of the working chamber, and simultaneously can prevent the gas loss caused by the oil injection channel and the oil injection groove, so that the energy efficiency of the scroll compressor is improved better.

According to the technical scheme, the fixed scroll comprises a first end plate and a fixed scroll structure arranged on the bottom surface of the first end plate, wherein the oil injection channel comprises an oil injection hole, a communication hole and a back pressure hole, the oil injection hole is arranged on the bottom surface of the fixed scroll structure, the back pressure hole is arranged on the bottom surface of the first end plate, two ends of the communication hole are respectively communicated with the oil injection hole and the back pressure hole, the oil injection groove is intermittently communicated with the oil injection hole, and the back pressure hole is intermittently communicated with the working chamber.

In the technical scheme, the fixed scroll comprises a first end plate and a fixed scroll structure, wherein the fixed scroll structure is arranged on the bottom surface of the first end plate and is in a scroll shape, and the exhaust hole is arranged in the fixed scroll structure so as to facilitate exhaust. The oil injection channel specifically comprises an oil injection hole, a connecting hole and a back pressure hole, wherein the back pressure hole is formed in the bottom surface of the first end plate, the oil injection hole is formed in the bottom surface of the fixed vortex structure, the oil injection hole and the back pressure hole are blind holes, the communication hole is formed in the first end plate and the inside of the fixed vortex structure, and two ends of the communication hole are respectively communicated with the oil injection hole and the back pressure hole, so that a through oil injection channel is formed. In the working process of the scroll compressor, the movable scroll moves horizontally relative to the fixed scroll, the back pressure Kong Jiaoti is opened and closed, and meanwhile, the oil injection groove is alternately communicated and disconnected in the oil injection hole, so that the back pressure chamber and the working chamber of the scroll compressor are alternately communicated and disconnected.

In the technical scheme, the movable scroll comprises a second end plate and a movable scroll structure arranged on the top surface of the second end plate, wherein the movable scroll structure is meshed with the fixed scroll structure and forms a working chamber with the fixed scroll structure, the oil injection groove is arranged on the top surface of the second end plate and is positioned on the outer side of the movable scroll structure, one end of the oil injection groove extends to the edge of the second end plate, and the other end of the oil injection groove extends to a direction close to the movable scroll structure.

In the technical scheme, the movable vortex plate specifically comprises a second end plate and a movable vortex structure, wherein the movable vortex structure is arranged on the top surface of the second end plate and forms a vortex-shaped arrangement matched with the fixed vortex structure, and the movable vortex structure is meshed with the fixed vortex structure and encloses a working chamber. Wherein, with the operation of the movable scroll, the shape and volume of the working chamber may change. Through being located the outside of moving vortex structure on the second end plate and setting up the oil filler groove to after the laminating of the bottom surface of second end plate and quiet vortex structure, the oil filler groove can follow-up vortex dish's operation intermittent type nature and oil filler point intercommunication and disconnection, in order to carry out the oiling operation. One end of the oil injection groove extends to the edge of the second end plate to be communicated with the back pressure chamber, and the other end of the oil injection groove extends to a direction close to the movable vortex structure to correspond to the position of the oil injection hole.

In the technical scheme, the aperture of the back pressure hole is smaller than the tooth thickness of the movable vortex structure.

In this technical scheme, move the top surface of vortex structure and laminating mutually with the bottom surface of first terminal plate, through prescribing a limit to the aperture size of back pressure hole for the aperture of back pressure hole is less than the tooth thickness of moving vortex structure, makes to move vortex structure when moving the position to the back pressure hole, can block back pressure hole completely, so that back pressure hole and working chamber realize alternate intercommunication and disconnection, in order to prevent back pressure hole and move the size mismatch of vortex structure and lead to gas to leak to back pressure chamber through the back pressure hole.

In the above technical scheme, the one end that the oil injection groove is close to the movable vortex structure is the circular arc structure, and the diameter of circular arc structure equals with the groove width of oil injection groove.

In this technical scheme, the oil injection groove is close to the one end that moves vortex structure and is circular arc structure, for example semicircle structure, and the shaping of being convenient for can play the guide effect when fluid flows through simultaneously. The groove width of the oil injection groove is equal to the diameter of the circular arc structure, so that the equal-width long-strip-shaped groove body is formed, the processing is easy, and meanwhile, the pressure change to the oil can be reduced when the oil flows through the groove.

In the technical scheme, the groove width of the oil injection groove is larger than or equal to 1mm, and the groove depth of the oil injection groove is larger than or equal to 0.5mm.

In this technical scheme, through setting up the specific 1mm or more of groove width size of oil injection groove, the groove depth is greater than or equal to 0.5mm to when second end plate and the laminating of quiet vortex dish, prevent that the oil injection groove from being too narrow and influencing the flow of fluid.

In the technical scheme, the bottom surface of the first end plate is provided with the side wall along the circumferential direction, the air inlet hole is arranged along the radial direction and penetrates through the side wall, and the included angle between the central line of the air inlet hole and the back pressure hole is 225-315 degrees in the gradually shrinking direction of the fixed vortex structure.

In the technical scheme, the air inlet holes are arranged along the radial direction of the first end plate so as to be connected with the air inlet pipe of the scroll compressor, and penetrate through the side wall of the first end plate so as to be communicated with the working chamber. When the air inlet and the working chamber are in a communication state, air suction operation is performed, the communication relation between the air inlet and the working chamber is blocked along with the operation of the movable scroll, then the air in the working chamber is compressed, and finally the compressed air is discharged to the exhaust chamber of the scroll compressor through the exhaust hole, so that one working cycle is completed. The included angle between the central line of the air inlet hole and the back pressure hole is set so that the back pressure hole and the air inlet hole keep proper intervals, and particularly, the included angle is in the range of 225-315 degrees in the gradually shrinking direction of the fixed vortex structure, and the back pressure hole can obtain better back pressure.

In the technical scheme, the back pressure hole and the air inlet hole are always kept in a disconnected state.

In the technical scheme, in the running process of the movable scroll, the back pressure hole is always kept in a disconnected state with the air inlet hole, so that the influence of oiling operation on the air suction process is prevented, and meanwhile, the air is prevented from leaking outwards from the air inlet hole in the compression process.

In the above technical solution, the bottom of the second end plate is provided with an eccentric bearing.

In the technical scheme, the eccentric bearing is arranged at the bottom of the second end plate so as to be convenient to connect with the eccentric part of the driving mechanism when the eccentric bearing is assembled in the scroll compressor, thereby realizing eccentric connection of the movable scroll, and enabling the movable scroll to translate relative to the fixed scroll under the driving of the driving mechanism.

In the technical scheme, the working chamber comprises a first chamber and a second chamber, wherein the first chamber is positioned between the outer side face of the movable vortex structure and the inner side face of the fixed vortex structure, the second chamber is positioned between the inner side face of the movable vortex structure and the outer side face of the fixed vortex structure, and the back pressure Kong Jiaoti is communicated with the first chamber and the second chamber, so that oil in the back pressure chamber is alternately injected into the first chamber and the second chamber.

In the technical scheme, the working chamber comprises a first chamber and a second chamber, specifically, the first chamber is formed between the outer side face of the movable vortex structure and the inner side face of the fixed vortex structure, the second chamber is formed between the inner side face of the movable vortex structure and the outer side face of the fixed vortex structure, and the shape and the volume of the first chamber and the second chamber are periodically changed along with the operation of the movable vortex plate. In this process, the back pressure hole is alternately communicated with the first chamber and the second chamber, and when the orbiting scroll structure seals the back pressure hole, the communication relationship between the back pressure hole and the first chamber and the second chamber is disconnected. The oil in the back pressure chamber can be alternately injected into the first chamber and the second chamber under the action of pressure, so that gaps of the first chamber and the second chamber are respectively sealed, and the leakage of gas in the working chamber through the gaps is further reduced.

In the technical scheme, the movable scroll moves for one circle in a translation way, and oil is injected into the first cavity and the second cavity once respectively.

In the technical scheme, the movable scroll makes one circle of translation relative to the fixed scroll to form a working cycle, and in the working cycle process, the first chamber and the second chamber are respectively communicated with the back pressure hole once, and correspondingly, oil is respectively injected into the first chamber and the second chamber once, so that the oil injection operation is matched with the working cycle of the movable scroll.

In the technical scheme, the maximum volume of the first chamber is larger than that of the second chamber, and the communication time length of the first chamber and the back pressure chamber is longer than or equal to that of the second chamber and the back pressure chamber.

In the technical scheme, the maximum volume of the first chamber is larger than the maximum volume of the second chamber, namely the maximum volumes of the first chamber and the second chamber are different, so that the method is convenient to apply to the asymmetric profile scroll compressor. At this time, by setting the communication duration of the back pressure chamber and the first chamber to be not less than the communication duration of the back pressure chamber and the second chamber, different exhaust amounts of the first chamber and the second chamber are realized by matching the respective corresponding maximum volumes of the first chamber and the second chamber.

An embodiment of the second aspect of the present application provides a scroll compressor, which includes a housing, an air inlet pipe and an air outlet pipe are provided on the housing, oil is accommodated in the housing, a frame is provided in the housing, the scroll assembly of any one of the embodiments of the first aspect is provided on the frame, an air inlet hole and an air outlet hole of the scroll assembly are respectively communicated with the air inlet pipe and the air outlet pipe, a back pressure chamber is formed between a movable scroll and the frame of the scroll assembly, and a driving assembly is provided in the housing, and an output end of the driving assembly is eccentrically connected with the movable scroll and is used for driving the movable scroll to translate relative to the fixed scroll.

According to an embodiment of the second aspect of the present application, a scroll compressor comprises a housing, a frame, a scroll assembly and a drive assembly as in the embodiment of the first aspect described above. The frame, the vortex plate component and the driving component are all arranged in the shell. The frame serves as a mounting base for the scroll assembly and the drive assembly to form a support for the scroll assembly and the drive assembly. The fixed scroll of the scroll assembly is fixedly connected to the frame, a back pressure chamber is formed between the movable scroll of the scroll assembly and the frame, and the output end of the driving assembly is eccentrically connected with the movable scroll to drive the movable scroll to translate relative to the fixed scroll. The shell is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is communicated with an air inlet hole of the fixed scroll, and an air outlet hole of the fixed scroll is communicated with the air outlet pipe through an air outlet cavity in the shell so as to facilitate air suction and air outlet operation. Oil is stored in the shell, and can enter the back pressure chamber through the oil duct.

The oil injection channel of the fixed scroll plate can be intermittently communicated with the oil injection groove of the movable scroll plate and the working chamber along with the operation of the movable scroll plate, so that intermittent communication and disconnection between the back pressure chamber and the working chamber are realized, and then the pressure difference between the back pressure chamber and the working chamber is utilized, so that oil in the back pressure chamber is intermittently injected into the working chamber to seal a gap in the working chamber, gas leakage of the working chamber is prevented, and meanwhile, gas in the working chamber can be prevented from entering the back pressure chamber through the oil supply channel and the oil injection groove, so that gas flow loss in the working process of the scroll compressor is effectively reduced, and the improvement of energy efficiency of the scroll compressor is facilitated.

In addition, the scroll compressor in this solution has all the advantages of the scroll assembly according to any one of the embodiments of the first aspect, which are not described herein.

In a third aspect of the present application, there is provided an air conditioner including an indoor unit, an outdoor unit connected to the indoor unit through a pipe, and a scroll compressor according to the second aspect of the present application.

According to an embodiment of the third aspect of the present application, an air conditioner includes an indoor unit and an outdoor unit connected by a pipe to achieve air conditioning by a circulating flow of a refrigerant. The outdoor unit is provided with the scroll compressor in the embodiment of the second aspect, and the scroll compressor is used for compressing the refrigerant and changing the state of the refrigerant so as to meet the operation requirement of the air conditioner.

In addition, the air conditioner in this solution has all the advantages of the scroll compressor in the embodiment of the second aspect, which is not described herein.

Additional aspects and advantages of embodiments of the application will be made apparent in the description which follows or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of embodiments of the application will be apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 illustrates a cross-sectional view of a scroll compressor according to one embodiment of the present application;

FIG. 2 shows a partial schematic view of FIG. 1;

FIG. 3 illustrates a schematic upper structural view of a non-orbiting scroll in accordance with one embodiment of the present application;

FIG. 4 illustrates a schematic view of the lower structure of an orbiting scroll in accordance with one embodiment of the present application;

FIG. 5 illustrates a schematic view of a non-orbiting scroll in accordance with an embodiment of the application;

FIG. 6 shows a cross-sectional view taken along A-A in FIG. 5;

FIG. 7 illustrates a schematic view of an orbiting scroll in accordance with an embodiment of the application;

FIG. 8 shows a cross-sectional view B-B of FIG. 7;

FIG. 9 illustrates a schematic view of a non-orbiting scroll in accordance with an embodiment of the application;

FIG. 10 illustrates a cross-sectional view of a scroll assembly according to one embodiment of the application;

FIG. 11 illustrates a schematic view of a scroll assembly according to one embodiment of the present application;

FIG. 12 illustrates a cross-sectional view of a scroll assembly according to one embodiment of the application;

FIG. 13 illustrates a schematic view of a scroll assembly according to one embodiment of the present application;

FIG. 14 illustrates a cross-sectional view of a scroll assembly according to one embodiment of the application;

FIG. 15 illustrates a schematic view of a scroll assembly according to one embodiment of the present application;

FIG. 16 illustrates a cross-sectional view of a scroll assembly according to one embodiment of the application;

FIG. 17 illustrates a schematic view of a scroll assembly according to one embodiment of the present application;

FIG. 18 illustrates a cross-sectional view of a scroll assembly according to one embodiment of the application;

FIG. 19 illustrates a schematic view of a scroll assembly according to one embodiment of the present application;

FIG. 20 illustrates a cross-sectional view of a scroll assembly according to one embodiment of the application;

FIG. 21 illustrates a schematic view of a scroll assembly according to one embodiment of the present application;

FIG. 22 illustrates a cross-sectional view of a scroll assembly according to one embodiment of the application;

FIG. 23 illustrates a schematic view of a scroll assembly according to one embodiment of the application;

FIG. 24 illustrates a cross-sectional view of a scroll assembly according to one embodiment of the application;

FIG. 25 illustrates a schematic view of a scroll assembly according to one embodiment of the application;

fig. 26 shows a schematic block diagram of an air conditioner according to an embodiment of the present application.

The correspondence between the reference numerals and the component names in fig. 1 to 26 is as follows:

The device comprises a vortex plate component, a static plate component 111, a static plate end plate component 1111, a bottom wall, a side wall 1112, a static plate scroll, a static plate intake hole 113, an exhaust hole 114, an oil injection channel 115, an oil injection hole 1152, a back pressure hole 1153, a movable plate component 121, a movable plate scroll 122, an oil injection groove 123, an eccentric bearing 124, a working chamber 13, a first chamber 131, a second chamber 132, a vortex compressor 2, a shell 21, an intake pipe 211, an exhaust pipe 212, a back pressure chamber 213, an exhaust chamber 214, a frame 22, a drive component 23, a motor 231, a crankshaft 232, an air conditioner 3, an indoor unit 31 and an outdoor unit 32.

Detailed Description

In order that the above-recited objects, features and advantages of embodiments according to the present application can be more clearly understood, a further detailed description of embodiments according to the present application will be rendered by reference to the appended drawings and detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments according to the present application, but embodiments according to the present application may be practiced otherwise than as described herein, and therefore the scope of the application is not limited to the specific embodiments disclosed below.

A scroll assembly, a scroll compressor, and an air conditioner according to some embodiments of the present application are described below with reference to fig. 1 to 26.

Example 1

In this embodiment a scroll assembly 1 is provided which may be used in a scroll compressor 2.

As shown in fig. 1 and 2, the scroll assembly 1 includes a fixed disk 11 (i.e., a fixed scroll) and a movable disk 12 (i.e., a movable scroll). The movable disk 12 is meshed with the static disk 11, and a working chamber 13 is defined between the movable disk and the static disk 11.

The movable plate 12 can translate relative to the stationary plate 11, and the form and volume of the working chamber 13 dynamically change during operation of the movable plate 12.

The fixed disk 11 is provided with an air inlet 113 and an air outlet 114, and when assembled to the scroll compressor 2, the air inlet 113 communicates with an air inlet 211 of the scroll compressor 2, and the air outlet 114 communicates with an air outlet chamber 214 of the scroll compressor 2.

During the operation of the scroll compressor 2, gas can enter the working chamber 13 through the gas inlet 113 and compress the gas in the working chamber 13 under the action of the movable plate 12, and the compressed gas can be discharged to the discharge chamber 214 of the scroll compressor 2 through the gas outlet 114 and then discharged to the outside through the gas outlet pipe 212.

As shown in fig. 3 and 4, the fixed plate 11 is provided with an oil injection passage 115, and the movable plate 12 is provided with an oil injection groove 123, and the oil injection groove 123 can communicate with the back pressure chamber 213 of the scroll compressor 2. During operation of the movable disk 12, the oil injection groove 123 may intermittently communicate with the oil injection passage 115 and the working chamber 13, and the back pressure chamber 213 may be brought into communication with the working chamber 13, or the oil injection groove 123 may intermittently be disconnected from the oil injection passage 115 and the working chamber 13.

There is pressure difference between the working chamber 13 and the back pressure chamber 213, and oil in the back pressure chamber 213 can flow into the working chamber 13 through the oil injection groove 123 and the oil injection channel 115 under the pressure effect, so as to realize intermittent oil injection, lubricate the joint surface between the movable disc 12 and the static disc 11, and simultaneously seal the gap in the working chamber 13.

In addition, there is a slight gap in the contact surface between the movable disk 12 and the stationary disk 11 of the scroll compressor 2, and in general, gas flows into or out of the working chamber 13 under pressure, resulting in a loss of gas flow.

The scroll assembly 1 in this embodiment can effectively prevent the gas in the working chamber 13 from leaking to the back pressure chamber 213, and can prevent the gas in the back pressure chamber 213 from entering the working chamber 13 through the oil injection channel 115, thereby reducing the flow loss of the gas in the working process of the scroll assembly 1, and being beneficial to promoting the energy efficiency of the scroll compressor 2.

It will be appreciated that the pressure of the back pressure chamber 213 of the scroll compressor 2 is typically between the suction pressure and the discharge pressure, and that oil in the oil storage space of the scroll compressor 2 can enter the back pressure chamber 213 under pressure to provide oil to the working chamber 13.

Example two

In this embodiment, a scroll assembly 1 is provided, which is further improved on the basis of the first embodiment.

As shown in fig. 1 to 4, the oil filling passage 115 is alternately connected to and disconnected from the oil filling groove 123 and the working chamber 13 as the pressure in the working chamber 13 changes.

When the pressure of the working chamber 13 is greater than the pressure of the back pressure chamber 213, the pressure of the working chamber 13 is high at this time, and the communication relationship between the oil injection passage 115 and the oil injection groove 123 and the working chamber 13 is broken by the operation of the movable disk 12, so that the gas in the working chamber 13 is prevented from entering the back pressure chamber 213 through the oil injection passage 115 and the oil injection groove 123, to reduce the gas loss.

When the pressure of the working chamber 13 is smaller than the pressure of the back pressure chamber 213, the pressure of the working chamber 13 is lower at this time, and the oil injection channel 115 is communicated with the oil injection groove 123 and the working chamber 13 by the operation of the movable disk 12, so that a pressure difference is formed between the back pressure chamber 213 and the working chamber 13, and the oil in the back pressure chamber 213 enters the working chamber 13 through the oil injection groove 123 and the oil injection channel 115 under the action of pressure, so as to seal the gap of the working chamber 13 and prevent gas from leaking to the back pressure chamber 213 through the gap.

The arrangement in this embodiment can reduce the gas flow loss caused by the gap of the working chamber 13, and can prevent the gas loss caused by the oil injection channel 115 and the oil injection groove 123, so that the energy efficiency of the scroll compressor 2 is improved better.

Example III

In this embodiment, a scroll assembly 1 is provided, which is further improved on the basis of the second embodiment.

As shown in fig. 1 to 4, the stationary plate 11 specifically includes a stationary plate end plate 111 (i.e., a first end plate) and a stationary plate wrap 112 (i.e., a stationary scroll structure). The stationary platen scroll 112 is provided on the bottom surface of the stationary platen end plate 111 and is provided in a spiral shape. An exhaust port 114 is located in the stationary plate scroll 112 to facilitate exhaust.

As shown in fig. 5 and 6, the oil filling channel 115 specifically includes an oil filling hole 1151, a connecting hole and a back pressure hole 1153, the back pressure hole 1153 is disposed on the bottom surface of the fixed disc end plate 111, the oil filling hole 1151 is disposed on the bottom surface of the fixed disc scroll 112, the oil filling hole 1151 and the back pressure hole 1153 are blind holes, the communication hole 1152 is disposed inside the fixed disc end plate 111 and the fixed disc scroll 112, and two ends of the communication hole 1152 are respectively communicated with the oil filling hole 1151 and the back pressure hole 1153, so as to form a through oil filling channel 115.

During the operation of the scroll compressor 2, the movable disc 12 translates relative to the fixed disc 11, and the back pressure hole 1153 is opened and closed alternately, and simultaneously, the oil injection groove 123 is opened and closed alternately at the oil injection hole 1151, so that the back pressure chamber 213 of the scroll compressor 2 and the working chamber 13 are opened and closed alternately.

It should be noted that the bottom surface and the top surface in this embodiment are both referred to the height direction of the static disc 11 in the assembled state, for example, the state in fig. 1 and 2, and the lower structure of the static disc 11 is schematically shown in fig. 3, which is not the direction in the assembled state.

Example IV

In this embodiment, a scroll assembly 1 is provided, which is further improved on the basis of the third embodiment.

As shown in fig. 1 to 4, the movable disk 12 specifically includes a movable disk end plate 121 (i.e., a second end plate) and a movable disk wrap 122 (i.e., a movable scroll structure), and the movable disk wrap 122 is provided on a top surface of the movable disk end plate 121 and forms a scroll-like arrangement adapted to the fixed disk wrap 112. The orbiting scroll 122 is engaged with the fixed scroll 112 and encloses the working chamber 13 with the fixed scroll 112.

Wherein the shape and volume of the working chamber 13 changes with the operation of the movable plate 12. An oil injection groove 123 is provided on the top surface of the movable disc end plate 121 at a position located outside the movable disc scroll 122 so that the oil injection groove 123 can intermittently communicate with and disconnect from the oil injection hole 1151 following the operation of the movable disc 12 after the top surface of the movable disc end plate 121 is bonded to the bottom surface of the stationary disc scroll 112.

One end of the oil injection groove 123 extends to the edge of the movable plate end plate 121 so that the oil injection groove 123 can communicate with the back pressure chamber 213 of the scroll compressor 2 when the scroll assembly 1 is assembled with the scroll compressor 2, and the other end of the oil injection groove 123 extends in a direction approaching the movable plate wrap 122 so as to correspond to the position of the oil injection hole 1151 so as to communicate with the oil injection hole 1151, thereby facilitating an oil injection operation.

Further, the aperture of the back pressure hole 1153 is smaller than the tooth thickness of the orbiting scroll 122, so that the orbiting scroll 122 can completely block the back pressure hole 1153 when moving to the position of the back pressure hole 1153, so that the back pressure hole 1153 is alternately communicated with and disconnected from the working chamber 13, and further, the gas leakage to the back pressure chamber 213 through the back pressure hole 1153 due to the mismatching of the sizes of the back pressure hole 1153 and the orbiting scroll 122 is prevented.

Example five

In this embodiment, a scroll assembly 1 is provided, which is further improved on the basis of the fourth embodiment.

As shown in fig. 7, the end of the oil injection groove 123 near the orbiting scroll 122 has a circular arc structure, specifically a semicircular structure, which is convenient for processing and forming, and can guide oil when the oil flows.

The groove width of the oil injection groove 123 is equal to the diameter of the circular arc structure, so that the oil injection groove 123 integrally forms an equal-width long groove body, the processing is easy, and the pressure change of the oil caused by the width change can be reduced when the oil flows through the groove.

Further, the width of the oil injection groove 123 is greater than or equal to 1mm, and the depth of the oil injection groove is greater than or equal to 0.5mm, so that the oil injection groove 123 can maintain a proper overflow area when the movable disc end plate 121 is attached to the static disc 11, and the oil injection groove 123 is prevented from being too narrow to affect the normal flow of oil.

Example six

As shown in fig. 1, 2 and 8, the bottom of the movable disc end plate 121 is provided with an eccentric bearing 124. When the scroll assembly 1 is assembled to the scroll compressor 2, the eccentric bearing 124 can be connected to an eccentric member (e.g., a crankshaft) of the drive mechanism, thereby achieving eccentric connection of the movable disk 12. When the scroll compressor 2 is in operation, the movable disk 12 can translate relative to the fixed disk 11 under the drive of the eccentric component of the drive mechanism, so as to compress gas.

Example seven

As shown in fig. 1 to 3 and 9, the stationary plate end plate 111 of the stationary plate 11 includes a bottom wall 1111 and a side wall 1112, the side wall 1112 being disposed along a circumferential direction of the bottom wall 1111, and the stationary plate scroll 112 being located inside the side wall 1112. The intake holes 113 are provided in a radial direction of the fixed disc end plate 111 so as to be connected to the intake pipe 211 of the scroll compressor 2, and at the same time, the intake holes 113 pass through the side wall 1112 of the fixed disc end plate 111 so as to be capable of communicating with the working chamber 13.

When the air inlet 113 and the working chamber 13 are in a communication state, air is sucked, air enters the working chamber 13 through the air inlet 113, and along with the operation of the movable plate 12, the air inlet 113 and the working chamber 13 are disconnected, so that the air in the working chamber 13 is compressed, and the compressed air is discharged to the exhaust chamber 214 of the scroll compressor 2 through the exhaust hole 114, so that one working cycle is completed.

Wherein an included angle β exists between the center line of the air intake hole 113 and the back pressure hole 1153, so that a proper interval is maintained between the back pressure hole 1153 and the air intake hole 113, specifically, as shown in fig. 9, in a direction in which the fixed disc scroll 112 is gradually contracted (i.e., counterclockwise in fig. 9), the center line of the air intake hole 113 rotates around the center point of the fixed disc 11 by an included angle β to the center point of the back pressure hole 1153, and an included angle β is 225 ° or less and 315 ° or less, in which range the back pressure hole 1153 can obtain a superior back pressure.

Example eight

As shown in fig. 1 to 4, the intake hole 113 extends to the outside of the fixed scroll 112, and the back pressure hole 1153 is located at the inside of the fixed scroll 112. During operation of the movable plate 12, the movable plate 12 can separate the back pressure hole 1153 from the air inlet 113, so that the back pressure hole 1153 is always kept in a disconnected state from the air inlet 113, thereby preventing the air suction process from being influenced by the oiling operation, and simultaneously preventing air from leaking outwards from the air inlet 113 during compression.

Example nine

As shown in fig. 1, 2 and 10, the working chamber 13 includes a first chamber 131 and a second chamber 132. Specifically, a first chamber 131 is formed between the outer side of the orbiting scroll 122 and the inner side of the stationary scroll 112, and a second chamber 132 is formed between the inner side of the orbiting scroll 122 and the outer side of the stationary scroll 112.

The shape and volume of the first and second chambers 131 and 132 are periodically changed with the operation of the movable plate 12. In this process, the back pressure hole 1153 is alternately communicated with the first chamber 131 and the second chamber 132, and when the orbiting scroll 122 blocks the back pressure hole 1153, the communication relationship between the back pressure hole 1153 and the first chamber 131 and the second chamber 132 is interrupted.

Wherein, due to the existence of the pressure difference between the back pressure chamber 213 and the working chamber 13, with the operation of the movable disc 12, the oil in the back pressure chamber 213 can be injected into the first chamber 131 and the second chamber 132 alternately under the pressure effect, so as to seal the gaps of the first chamber 131 and the second chamber 132 respectively, and further prevent the gas in the working chamber 13 from leaking outwards through the gaps.

Further, the movable disk 12 translates one revolution relative to the stationary disk 11 for one working cycle. During one working cycle, the first chamber 131 and the second chamber 132 are respectively communicated with the back pressure hole 1153 once, and accordingly, the back pressure chamber 213 injects oil once to each of the first chamber 131 and the second chamber 132 to match the oil injection operation with the working cycle of the movable plate 12. Wherein, between the two oil filling processes, the back pressure hole 1153 is closed to prevent the gas from reversely flowing into the back pressure chamber 213 from the back pressure hole 1153.

Examples ten

In this embodiment, a scroll assembly 1 is provided, which is further improved on the basis of the ninth embodiment.

The maximum volume of the first chamber 131 is larger than the maximum volume of the second chamber 132, i.e. the maximum volumes of the first chamber 131 and the second chamber 132 are different, and there is a volume difference between them. The communication time length of the first chamber 131 and the back pressure chamber 213 is greater than or equal to the communication time length of the second chamber 132 and the back pressure chamber 213, that is, the communication time length of the back pressure chamber 213 and the first chamber 131 is not less than the communication time length of the back pressure chamber 213 and the second chamber 132, so that the communication time length of each of the first chamber 131 and the second chamber 132 and the back pressure chamber 213 is matched with the maximum volume of each, and different exhaust gas amounts of the first chamber 131 and the second chamber 132 are realized, so that the method is applied to an asymmetric linear scroll compressor.

One specific embodiment of the above-described scroll assembly 1 is provided below:

In this embodiment, a scroll assembly 1 is provided, which can be used for the scroll assembly 1.

The stationary plate 11 specifically includes a stationary plate end plate 111 (i.e., a first end plate) and a stationary plate wrap 112 (i.e., a stationary scroll structure). The stationary platen scroll 112 is provided on the bottom surface of the stationary platen end plate 111 and is provided in a spiral shape. The stationary plate end plate 111 includes a bottom wall 1111 and a side wall 1112, the side wall 1112 being disposed along a circumferential direction of the bottom wall 1111, and the stationary plate scroll 112 being located inside the side wall 1112.

As shown in fig. 1 to 3, the fixed plate 11 is provided with an intake hole 113 and an exhaust hole 114, the intake hole 113 is provided in a radial direction of the fixed plate end plate 111 so as to be connected to an intake pipe 211 of the scroll compressor 2, and at the same time, the intake hole 113 penetrates through a side wall 1112 of the fixed plate end plate 111 so as to be capable of communicating with the working chamber 13. An exhaust port 114 is located in the stationary plate scroll 112 to facilitate exhaust. When assembled to the scroll compressor 2, the intake port 113 communicates with the intake pipe 211 of the scroll compressor 2, and the exhaust port 114 communicates with the exhaust chamber 214 of the scroll compressor 2.

The movable disc 12 can translate relative to the fixed disc 11, during the working process of the scroll compressor 2, gas can enter the working chamber 13 through the gas inlet 113 and compress the gas in the working chamber 13 under the action of the movable disc 12, and the compressed gas can be discharged to the exhaust chamber 214 of the scroll compressor 2 through the gas outlet 114 and then discharged to the outside through the gas outlet pipe 212.

As shown in fig. 3 and 4, the fixed plate 11 is provided with an oil injection passage 115, and in correspondence thereto, the movable plate 12 is provided with an oil injection groove 123, and the oil injection groove 123 can communicate with the back pressure chamber 213 of the scroll compressor 2.

As shown in fig. 7, an oil injection groove 123 is provided on the top surface of the movable-disc end plate 121 at a position outside the movable-disc wrap 122, and one end of the oil injection groove 123 extends to the edge of the movable-disc end plate 121 so that the oil injection groove 123 can communicate with the back pressure chamber 213 of the scroll compressor 2 when the scroll assembly 1 is assembled with the scroll compressor 2, and the other end of the oil injection groove 123 extends in a direction close to the movable-disc wrap 122 so as to correspond to the position of the oil injection hole 1151 so as to be capable of communicating with the oil injection hole 1151, thereby facilitating the oil injection operation.

During operation of the movable disk 12, the oil injection groove 123 may intermittently communicate with the oil injection passage 115 and the working chamber 13, and the back pressure chamber 213 may be brought into communication with the working chamber 13, or the oil injection groove 123 may intermittently be disconnected from the oil injection passage 115 and the working chamber 13. In this process, the movable plate 12 can separate the back pressure hole 1153 from the air intake hole 113, so that the back pressure hole 1153 is always kept disconnected from the air intake hole 113, to prevent the oil injection operation from affecting the air intake process.

As shown in fig. 5 and 7, the aperture of the back pressure hole 1153 is smaller than the tooth thickness of the orbiting scroll 122, so that the orbiting scroll 122 can completely block the back pressure hole 1153 when moving to the position of the back pressure hole 1153, so that the back pressure hole 1153 is alternately connected to and disconnected from the working chamber 13.

There is a pressure difference between the working chamber 13 and the back pressure chamber 213, and the oil in the back pressure chamber 213 can flow into the working chamber 13 through the oil injection groove 123 and the oil injection passage 115 under the pressure effect, so that intermittent oil injection is realized.

Specifically, when the pressure of the working chamber 13 is greater than the pressure of the back pressure chamber 213, at this time, the pressure of the working chamber 13 is high, and the communication relationship between the oil injection passage 115 and the oil injection groove 123 and the working chamber 13 is broken by the operation of the movable plate 12, so that the gas in the working chamber 13 is prevented from entering the back pressure chamber 213 through the oil injection passage 115 and the oil injection groove 123, to reduce the gas loss.

As shown in fig. 7, the end of the oil injection groove 123 near the orbiting scroll 122 has a circular arc structure, specifically a semicircular structure, which is convenient for processing and forming, and can guide oil when the oil flows. The groove width of the oil injection groove 123 is equal to the diameter of the circular arc structure, so that the oil injection groove 123 integrally forms an equal-width long groove body, the processing is easy, and the pressure change of the oil caused by the width change can be reduced when the oil flows through the groove.

The groove width of the oil injection groove 123 is greater than or equal to 1mm, and the groove depth is greater than or equal to 0.5mm, so that the oil injection groove 123 can maintain a proper overflow area when the movable disc end plate 121 is attached to the static disc 11, and the oil injection groove 123 is prevented from being too narrow to influence the normal flow of oil.

As shown in fig. 1, 2 and 8, the bottom of the movable disc end plate 121 is provided with an eccentric bearing 124 for connecting an eccentric member (e.g., a crankshaft) of the driving mechanism when the scroll assembly 1 is assembled to the scroll compressor 2.

As shown in fig. 9, an angle β exists between the center line of the intake hole 113 and the back pressure hole 1153 so that a proper interval is maintained between the back pressure hole 1153 and the intake hole 113, specifically, in a direction in which the fixed scroll 112 is gradually contracted (i.e., counterclockwise in fig. 9), the center line of the intake hole 113 is rotated around the center point of the fixed scroll 11 by an angle β to the center point of the back pressure hole 1153, and an angle β of 225 ° or less than 315 ° or less, in which range the back pressure hole 1153 can obtain a superior back pressure.

With the operation of the movable disc 12, the shapes and volumes of the first chamber 131 and the second chamber 132 are periodically changed, and the maximum volume of the first chamber 131 is larger than that of the second chamber 132, and correspondingly, the communication time of the first chamber 131 and the back pressure chamber 213 is longer than the communication time of the second chamber 132 and the back pressure chamber 213, so that the scroll compressor can be applied to an asymmetric-type scroll compressor. In this process, the back pressure hole 1153 is alternately communicated with the first chamber 131 and the second chamber 132, and when the orbiting scroll 122 blocks the back pressure hole 1153, the communication relationship between the back pressure hole 1153 and the first chamber 131 and the second chamber 132 is interrupted.

Wherein the movable disk 12 translates relative to the stationary disk 11 for one cycle. During one working cycle, the first chamber 131 and the second chamber 132 are respectively communicated with the back pressure hole 1153 once, and accordingly, the back pressure chamber 213 injects oil once to each of the first chamber 131 and the second chamber 132 to match the oil injection operation with the working cycle of the movable plate 12. Wherein, between the two oil filling processes, the back pressure hole 1153 is closed to prevent the gas from reversely flowing into the back pressure chamber 213 from the back pressure hole 1153.

The following describes the operation of the rotor 12 in a working cycle:

Fig. 10 and 11 show the state when the back pressure hole 1153 is blocked by the driven disc scroll 122, at which time the oil injection groove 123 has been disconnected from the oil injection hole 1151 for a while, and the back pressure hole 1153 has just been disconnected from the second chamber 132. As the movable disk 12 continues to operate, the back pressure hole 1153 is about to enter the first chamber 131, as shown in fig. 12 and 13.

Fig. 14 and 15 show a state when the back pressure hole 1153 communicates with the first chamber 131, at this time, the oil injection groove 123 also communicates with the oil injection hole 1151, so that the back pressure chamber 213 is in a communication state with the first chamber 131, and since the pressure of the first chamber 131 at the back pressure hole 1153 is low (lower than the pressure of the back pressure chamber 213), the oil in the back pressure chamber 213 enters the first chamber 131 under pressure.

As the operation of the movable disk 12 proceeds, as in the state shown in fig. 16 and 17, the back pressure hole 1153 is still in communication with the first chamber 131, but the oil injection groove 123 is disconnected from the oil injection hole 1151. At this time, the pressure of the first chamber 131 at the back pressure hole 1153 is high (higher than the pressure of the back pressure chamber 213), but the gas in the first chamber 131 cannot enter the back pressure chamber 213.

Fig. 18 and 19 show the state when the back pressure hole 1153 is blocked by the passive disc 12, at which time the oil filler groove 123 has been disconnected from the oil filler hole 1151 for a while, and the back pressure hole 1153 has just been disconnected from the first chamber 131. As the movable disk 12 continues to operate, the back pressure port 1153 is about to enter the second chamber 132, as shown in fig. 20 and 21.

Fig. 22 and 23 show a state when the back pressure hole 1153 communicates with the second chamber 132, at this time, the oil injection groove 123 also communicates with the oil injection hole 1151, so that the back pressure chamber 213 is in a communication state with the second chamber 132, and since the pressure of the second chamber 132 at the back pressure hole 1153 is low (lower than the pressure of the back pressure chamber 213), the oil in the back pressure chamber 213 enters the second chamber 132 under pressure.

As the operation of the movable disk 12 proceeds, the back pressure hole 1153 is still in communication with the second chamber 132, but the oil filler groove 123 is disconnected from the oil filler hole 1151, as in the state shown in fig. 24 and 25. At this time, the pressure of the second chamber 132 at the back pressure hole 1153 is high (higher than the pressure of the back pressure chamber 213), but the gas in the second chamber 132 cannot enter the back pressure chamber 213.

Example eleven

In this embodiment, as shown in fig. 1 to 4, there is provided a scroll compressor 2, and the scroll compressor 2 includes a housing 21, a frame 22, the scroll assembly 1 in any of the above embodiments, and a drive assembly 23.

The housing 22, the scroll assembly 1 and the drive assembly 23 are all disposed within the shell 21. The frame 22 serves as a mounting base for the scroll assembly 1 and the drive assembly 23 to form a support for the scroll assembly 1 and the drive assembly 23.

The fixed disk 11 of the scroll assembly 1 is fixedly connected to the frame 22, and a back pressure chamber 213 is formed between the movable disk 12 of the scroll assembly 1 and the frame 22.

The output end of the driving component 23 is eccentrically connected with the movable disc 12 so as to drive the movable disc 12 to translate relative to the static disc 11. Specifically, the driving assembly 23 includes a motor 231 and a crankshaft 232, an eccentric portion of the crankshaft 232 is eccentrically connected with the movable disk 12, and the motor 231 outputs power to the movable disk 12 through the crankshaft 232 to drive the movable disk 12 to translate.

The casing 21 is provided with an air inlet pipe 211 and an air outlet pipe 212, the air inlet pipe 211 is communicated with the air inlet hole 113 of the static disc 11, and the air outlet hole 114 of the static disc 11 is communicated with the air outlet pipe 212 through an air outlet chamber 214 in the casing 21 so as to facilitate air suction and air outlet operations. The housing 21 stores oil therein, and the oil can enter the back pressure chamber 213 through the oil passage.

Along with the operation of the movable disc 12, the oil injection channel 115 of the fixed disc 11 can be intermittently communicated with the oil injection groove 123 of the movable disc 12 and the working chamber 13, so as to realize intermittent communication and disconnection between the back pressure chamber 213 and the working chamber 13, and further, oil in the back pressure chamber 213 is intermittently injected into the working chamber 13 by utilizing the pressure difference between the back pressure chamber 213 and the working chamber 13, so as to seal a gap in the working chamber 13.

The scroll compressor 2 in this embodiment can effectively prevent the gas leakage of the working chamber 13, and simultaneously can prevent the gas in the working chamber 13 from entering the back pressure chamber 213 through the oil supply channel and the oil injection groove 123, thereby effectively reducing the gas flow loss in the working process of the scroll compressor 2, and being beneficial to promoting the scroll compressor 2 to improve the energy efficiency.

In addition, the scroll compressor 2 in this embodiment has all the advantages of the scroll assembly 1 in any of the above embodiments, and will not be described in detail herein.

Example twelve

In this embodiment, as shown in fig. 1 and 26, there is provided an air conditioner 3, wherein the air conditioner 3 includes an indoor unit 31 and an outdoor unit 32 connected by a pipe to achieve air conditioning by circulating a refrigerant. The outdoor unit 32 is provided with the scroll compressor 2 in any of the above embodiments, and is configured to compress the refrigerant, and change the state of the refrigerant, so as to meet the operation requirement of the air conditioner 3.

In addition, the air conditioner 3 in this embodiment also has all the advantages of the scroll compressor 2 in any of the above embodiments, and will not be described in detail herein.

One specific embodiment of the present application is provided below:

A compression structure of vortex compressor is composed of casing, crankshaft, movable disk and static disk. The casing is a closed container with an air suction pipe and an air discharge pipe, the casing is in a high-pressure environment and stores lubricating oil, the crankshaft is provided with an eccentric part and rotates around a fixed shaft, the movable disk is provided with a mirror plate, a vortex-shaped scroll which is vertical to the front surface of the mirror plate, and the static disk is provided with an air suction hole and an air discharge hole and is provided with an inwards concave vortex-shaped scroll. The fixed disc scroll and the movable disc scroll are meshed to form a working cavity of the compressor. The working chamber sucks low-pressure gas from the suction inlet of the shell through the suction pipe, the low-pressure gas is compressed and discharged into the shell through the exhaust hole of the static disc, and finally the low-pressure gas is discharged from the exhaust pipe of the shell.

The working cavity comprises an A cavity (namely a first cavity) between the outer line of the movable disc scroll and the inner line of the fixed disc scroll, a B cavity (namely a second cavity) between the inner line of the movable disc scroll and the outer line of the fixed disc scroll, and a back pressure cavity, wherein the pressure of the back pressure cavity is the intermediate pressure between the suction pressure and the exhaust pressure, and the back pressure cavity provides supporting force for the front surface of the movable disc mirror plate to cling to the top surface of the fixed disc to prevent the locking disc from overturning. The back pressure hole is formed in the inner top surface of the static disc, and is alternately communicated with the cavity A and the cavity B along with the movement of the movable disc, and is covered by the scroll of the static disc during the alternation;

The oil injection groove is intermittently communicated with the oil injection hole along with the movement of the movable disc, and is disconnected from the oil injection hole before the scroll of the movable disc of the back pressure hole is covered in the pressure rising process of the back pressure hole.

The oil filling hole is formed in the static disc, the oil filling groove is formed in the moving disc moving in a plane, the oil filling groove and the oil filling hole are intermittently communicated and disconnected through the design of the position of the oil filling groove, and the fact that the oil filling groove is disconnected from the oil filling hole before the scroll of the driven disc of the back pressure hole is covered in the pressure rising process of the back pressure hole is guaranteed. The working cavity is communicated with the back pressure cavity when the pressure of the working cavity at the back pressure hole is lower, and the working cavity is disconnected with the back pressure cavity when the pressure of the working cavity at the back pressure hole is higher. The gas of the working chamber is prevented from entering the back pressure chamber, and the respiratory loss is reduced. And since the pressure of the back pressure chamber is lower than the exhaust pressure, the lubricating oil in the housing enters the back pressure chamber by the pressure difference. When the oil injection groove is communicated with the oil injection hole, because the pressure of the working cavity at the back pressure hole is lower than that of the back pressure cavity, lubricating oil is injected into the working cavity from the back pressure cavity, so that the working cavity is supplied with oil for gap sealing, and gas leakage is prevented.

The shell is provided with an air suction pipe and an air exhaust pipe, lubricating oil is stored at the bottom. The movable disk is provided with a mirror plate and a vortex-shaped scroll which is vertical to the front surface of the mirror plate, an eccentric bearing which protrudes out of the back surface of the mirror plate, and an oil injection groove is formed in the front surface of the mirror plate. The static disc is provided with an air suction hole and an air discharge hole, the concave vortex-shaped scroll is provided with a back pressure hole on the inner top surface of the static disc, the oil filling hole is provided with a bottom surface of the static disc scroll, and the two holes are mutually communicated through a radial communication hole. The fixed disc scroll and the movable disc scroll are meshed to form a working cavity of the compressor. A working chamber between the outer line of the moving disc scroll and the inner line of the static disc scroll, B working chamber between the inner line of the moving disc scroll and the outer line of the static disc scroll, and a main frame for supporting the crankshaft.

The back surface of the movable disk mirror plate is provided with a back pressure chamber, and the back pressure chamber is formed by enclosing a main frame, a static disk and a movable disk. The oil injection groove on the movable disk is communicated with the edge of the mirror plate, namely, the oil injection groove is communicated with the back pressure chamber.

On one hand, the back pressure chamber is communicated with the high pressure in the shell through a tiny gap, on the other hand, when the back pressure hole is communicated with the working cavity A or B and the oil injection groove is also communicated with the oil injection hole, the back pressure chamber is communicated with the working cavity, so that the back pressure chamber is at the intermediate pressure between the high pressure and the low pressure, and a supporting force is provided for the front surface of the movable disc mirror plate to be closely attached to the top surface of the static disc to prevent the tilting of the stop disc. Lubricating oil is pressed into the back pressure chamber from the shell and then injected into the working chamber, so that the working chamber is supplied with oil to perform gap sealing, and gas leakage is prevented.

In the process of rising the pressure of the back pressure hole, the oil injection groove is disconnected from the oil injection hole before the cover of the back pressure hole driven disc scroll, and the back pressure hole is disconnected from the back pressure chamber.

The oil injection groove consists of two parallel lines and an arc, the groove width is equal to the diameter of the arc, the groove width is more than or equal to 1mm, and the groove depth is more than or equal to 0.5mm. The oil injection groove is simple and easy to process.

The center line of the air suction hole rotates around the center of the static disc to the scroll shrinkage direction by an angle beta, and the angle beta is larger than or equal to 225 degrees and smaller than or equal to 315 degrees through the back pressure hole. Thereby, a superior back pressure can be obtained.

For an asymmetric-type linear scroll compressor, the volume of the working chamber a is larger than that of the working chamber B, so that the communication time between the back pressure chamber and the working chamber a is preferably not smaller than that between the back pressure chamber and the working chamber B.

In order to prevent the influence of air suction when oil is injected into the working cavity, the back pressure hole is preferably not communicated with the air suction hole of the static disc. The back pressure hole is about to communicate with the A/B chamber, and the A/B chamber is closed by inhalation.

The technical solutions according to some embodiments of the present application are described in detail above with reference to the drawings, which can effectively prevent gas in the working chamber from leaking into the back pressure chamber, and can prevent gas in the back pressure chamber from entering the working chamber through the oil injection channel, thereby reducing flow loss of gas in the working process of the scroll assembly, and facilitating promotion of energy efficiency improvement of the scroll compressor.

In embodiments according to the application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, the term "plurality" then referring to two or more unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, as they are used in a fixed or removable connection, or as they are integral with one another, as they are directly or indirectly connected through intervening media. The specific meaning of the above terms in the embodiments according to the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example according to the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment according to the present application, and is not intended to limit the technical solution of the present application, and various modifications and variations can be made to the technical solution of the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the technical solution of the present application should be included in the protection scope of the present application.

Claims

1. A scroll assembly for a scroll compressor, comprising:

the fixed scroll is provided with an air inlet, an air exhaust hole and an oil injection channel;

The movable scroll is meshed with the fixed scroll and forms a working chamber with the fixed scroll, an oil injection groove communicated with a back pressure chamber of the scroll compressor is formed in the movable scroll, and the movable scroll is configured to translate relative to the fixed scroll so as to compress gas entering the working chamber;

The oil injection channel is intermittently communicated with the oil injection groove and the working chamber, so that oil in the back pressure chamber is intermittently injected into the working chamber under the action of pressure difference between the back pressure chamber and the working chamber;

the fixed vortex plate comprises a first end plate and a fixed vortex structure arranged on the bottom surface of the first end plate;

The oil injection channel comprises an oil injection hole, a communication hole and a back pressure hole, the oil injection hole is arranged on the bottom surface of the fixed vortex structure, the back pressure hole is arranged on the bottom surface of the first end plate, and two ends of the communication hole are respectively communicated with the oil injection hole and the back pressure hole;

the oil injection groove is intermittently communicated with the oil injection hole, and the back pressure hole is intermittently communicated with the working chamber;

the movable vortex plate comprises a second end plate and a movable vortex structure arranged on the top surface of the second end plate, and the movable vortex structure is meshed with the fixed vortex structure and forms the working chamber with the fixed vortex structure;

The oil injection groove is arranged on the top surface of the second end plate and is positioned at the outer side of the movable vortex structure, one end of the oil injection groove extends to the edge of the second end plate, and the other end of the oil injection groove extends to the direction close to the movable vortex structure so as to correspond to the position of the oil injection hole;

The oil injection groove is provided with a circular arc structure at one end close to the movable vortex structure, the diameter of the circular arc structure is equal to the groove width of the oil injection groove, and the circular arc structure is a semicircular structure;

The groove width of the oil injection groove is larger than or equal to 1mm, and the groove depth of the oil injection groove is larger than or equal to 0.5mm;

the working chamber includes:

The first chamber is positioned between the outer side surface of the movable vortex structure and the inner side surface of the fixed vortex structure;

the second chamber is positioned between the inner side surface of the movable vortex structure and the outer side surface of the fixed vortex structure;

the back pressure Kong Jiaoti is communicated with the first chamber and the second chamber, so that oil in the back pressure chamber is alternately injected into the first chamber and the second chamber;

The maximum volume of the first chamber is greater than the maximum volume of the second chamber;

Wherein the communication time length of the first chamber and the back pressure chamber is longer than or equal to the communication time length of the second chamber and the back pressure chamber;

the back pressure hole and the air inlet hole are always kept in a disconnected state.

2. The scroll assembly of claim 1, wherein the scroll member comprises a plurality of scroll members,

When the pressure of the working chamber is greater than that of the back pressure chamber, the oiling channel is disconnected from the oiling groove and the working chamber;

The oil injection passage communicates with the oil injection groove and the working chamber when the pressure of the working chamber is smaller than the pressure of the back pressure chamber.

3. The scroll assembly of claim 1, wherein the scroll member comprises a plurality of scroll members,

And the aperture of the back pressure hole is smaller than the tooth thickness of the movable vortex structure.

4. The scroll assembly of claim 1, wherein the scroll member comprises a plurality of scroll members,

The bottom surface of the first end plate is provided with a side wall along the circumferential direction, and the air inlet hole is arranged along the radial direction and penetrates through the side wall;

And in the direction of gradually shrinking the static vortex structure, the included angle between the central line of the air inlet hole and the back pressure hole is 225-315 degrees.

5. The scroll assembly of claim 1, wherein the scroll member comprises a plurality of scroll members,

And an eccentric bearing is arranged at the bottom of the second end plate.

6. The scroll assembly of any one of claims 1 to 5, wherein,

And the movable vortex plate moves horizontally for a circle, and oil is injected into the first chamber and the second chamber once respectively.

7. A scroll compressor, comprising:

The device comprises a shell, wherein an air inlet pipe and an air outlet pipe are arranged on the shell, and oil is contained in the shell;

The rack is arranged in the shell;

The scroll assembly according to any one of claims 1 to 6, provided on said frame, wherein an intake hole and an exhaust hole of said scroll assembly are respectively communicated with said intake pipe and said exhaust pipe, and a back pressure chamber is formed between an orbiting scroll of said scroll assembly and said frame;

The driving assembly is arranged in the shell, and the output end of the driving assembly is eccentrically connected with the movable scroll and is used for driving the movable scroll to translate relative to the fixed scroll.

8. An air conditioner, comprising:

an indoor unit;

an outdoor unit connected to the indoor unit through a pipe, wherein the scroll compressor according to claim 7 is provided in the outdoor unit.