CN114857084A - A curved fan and air fryer - Google Patents

Abstract

The invention discloses an arc-shaped fan and an air fryer, comprising a central connecting part and blades, the blades are uniformly connected and arranged circumferentially around the central connecting part, and the blades are of an arc-shaped structure as a whole, and the arc-shaped The extending direction is the same as the rotation direction of the arc-shaped fan; the first fan surface is vertically arranged on the blade surface, and the first fan surface is deflected toward the rotation direction of the arc-shaped fan. The present invention adopts the blades of the arc structure, which can realize that the air inside the fan can be thrown out with a larger power, thereby obtaining a larger air volume, and solving the problems in the prior art.

Description

A curved fan and air fryer

technical field

The invention relates to the field of cooking appliances, in particular to an arc fan and an air fryer.

Background technique

In the prior art, a fan is installed inside the air fryer, and the fan is mainly used to drive the high-speed circulating flow of hot air in the cavity of the air fryer, so as to realize the hot air frying and roasting of food. The blades of the fan in the existing air fryer are all straight and divergent extending structures along the radial direction of the fan. This kind of fan has the disadvantage of low air volume, and it is impossible to throw the air inside the fan to the surrounding at a high speed, which makes the entire fan. The hot air circulation in the air fryer is inefficient, resulting in long cooking times and poor quality food. So a new kind of fan is needed to solve this problem.

SUMMARY OF THE INVENTION

The invention provides an arc-shaped fan and an air fryer. The blades of the arc-shaped structure can be used to throw out the air inside the fan with greater power, thereby obtaining a greater air volume and solving the problems in the prior art. .

In order to achieve the above purpose, in the first aspect, the present invention provides the following technical solutions: an arc-shaped fan, comprising a central connecting portion and blades, the blades are uniformly connected and arranged circumferentially around the central connecting portion, and the blades are as a whole. The arc-shaped structure, and its arc-shaped extension direction is the same as the rotation direction of the arc-shaped fan; the first fan surface is vertically arranged on the blade surface, and the first fan surface faces the arc-shaped fan The rotation direction of the fan is deflected. Since the blades extend along the rotation direction of the arc fan, the air is thrown in the same direction as the rotation direction of the arc fan. Therefore, during the rotation of the fan, the first fan surface plays a The air inside the fan is thrown out at a high speed around the fan, and the air inside the fan can be thrown out with greater power, thereby obtaining a larger air volume, and improving the efficiency of hot air circulation in the air fryer, thereby reducing food cooking. time and the purpose of improving the quality of cooking.

Preferably, the first fan surface is arranged on the edge of the blade on the front side relative to the rotation direction of the arc-shaped fan, and the first fan surface is perpendicular to the blade, such a first fan surface Being arranged on the edge of the front side in the rotation direction of the fan, the first fan surface can more smoothly throw out the air along the rotation direction of the arc-shaped fan.

Preferably, a second fan surface is provided on the edge of the blade on the rear side relative to the rotation direction of the arc-shaped fan, and the second fan surface extends at least partially to the free end of the blade , the second fan surface is opposite to the first fan surface, so that each blade has two fan surfaces, based on the rotation direction, the front is the first fan surface, the back is the second fan surface, The second fan air surface can divide the air flow at the outlet of the blade and reduce the mixed flow at the outlet, so as to achieve a larger air output. Therefore, the first fan air surface and the second fan air surface cooperate. The function is to increase the fan area, reduce the turbulent wind caused by airflow rebound, and make the air flow more regular.

Preferably, the first end of the first fan surface extends to the free end of the blade, and the second end of the first fan surface extends to the root of the blade, so that the first fan surface can Use the length of the front edge of the blade as much as possible to maximize the effect of the first fan surface.

Preferably, the height H1 of the first fan surface is greater than the height H2 of the second fan surface, and the first fan surface is higher than the second fan surface, which is conducive to the cooperation between the second fan surface and the first fan surface , so that the airflow can be smoothly thrown out without causing front and rear interference.

Preferably, the blade, the first fan surface and the second fan surface connected to it are formed by bending a blank sheet, and the height H1 of the first fan surface is the same as the height H1 of the second fan surface. The sum of the heights H2 is not greater than the circumferential spacing H between the adjacent blades, and this setting makes it possible to use a piece of blank sheet to bend to form an integrated blade, the first fan surface and the second fan surface. structure, thereby reducing the production cost of the fan.

Preferably, the arc center angle of the first fan surface is θ=180°-(β ₁ +β ₂ )≦90°, wherein β1 is the inlet angle of the blade, and β ₂ is the outlet of the blade Angle, this angle setting can achieve the best air volume.

Preferably, the inlet angle β ₁ of the blade is in the range of 73°-77°, and/or the outlet angle β ₂ of the blade is in the range of 60°-65°, and this value of β ₁ and β ₂ The range is the most reasonable, and the best air volume can be achieved.

Preferably, an inclined portion is provided on the upper edge of one end of the first fan surface and the second fan surface facing the root of the blade, and the inclined portion has the effect of guiding the flow.

In a second aspect, the present invention also provides an air fryer, comprising a body and a cooking cavity arranged inside the body, the cooking cavity is provided with an air duct plate, and the air duct plate is provided with an inner cavity, so The arc-shaped fan as described in the first aspect is installed in the inner cavity, and the use of the arc-shaped fan improves the circulation efficiency of the hot air blown into the cooking cavity, shortens the cooking time, and improves the taste of food. The arc-shaped fan is located in the inner cavity, so that the hot air in the cooking cavity of the air fryer can flow to the center of the upper fan under the action of negative pressure, and the hot air entering the fan is thrown out of the fan and along the The fan plate spreads out and flows down into the cooking cavity.

Compared with the prior art, the beneficial effects of the present invention are:

The fan is designed as an arc structure, and the arc extension direction is the same as the rotation direction of the fan, so that when the fan rotates, the air inside the fan can be thrown out with greater power, thereby obtaining greater air volume; the fan also includes The arc-shaped blade and the arc-shaped first fan surface located at the front edge of the blade and the second fan surface located at the rear edge, the first fan surface is deflected towards the rotation direction of the fan, during the rotation of the fan, the large fan The second fan surface plays the role of shunting the air inside the fan to the surrounding at a high speed, thereby obtaining a larger air volume. Great air volume.

Description of drawings

Fig. 1 is the three-dimensional structure diagram of the first angle of view of the arc-shaped fan blade of the present invention;

FIG. 2 is a three-dimensional structural diagram of the arc-shaped fan blade of the present invention from a second perspective;

Fig. 3 is the enlarged structure diagram of A place of Fig. 2;

Fig. 4 is the schematic diagram of the rotation direction and the angle of the arc-shaped fan blade of the present invention;

Fig. 5 is the sectional structure diagram of the air fryer of the present invention;

FIG. 6 is a schematic diagram of the installation state of the arc-shaped fan blade of the present invention.

Reference number:

1. Body, 11, Central connecting part, 12, Blade, 13, Second fan surface, 14, First fan surface, 15, Inclined part, 2, Air duct plate, 3, Cooking cavity, 4, Concave cavity.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in Figures 1-6, the present invention solves the problem that the blades of the fan in the existing air fryer are straight and divergent extending structure, the fan air volume is low, the hot air circulation efficiency in the whole air fryer is low, the food cooking time is long, and the For the problem of poor quality, the following technical solutions are provided: a central connecting portion 11 and a blade 12, the blades 12 are evenly connected and arranged circumferentially around the central connecting portion 11, the blade 12 is an arc structure as a whole, and its arc The direction of the extension of the shape is the same as the rotation direction of the arc-shaped fan; it also includes a first fan surface 14, which is vertically arranged on the surface of the blade 12, and the first fan surface 14 faces the arc-shaped fan. deflection in the direction of rotation. Specifically, the first fan surface 14 may be disposed on the edge of the blade 12 on the front side relative to the rotation direction of the arc-shaped fan, and the first fan surface 14 is perpendicular to the blade 12, so that due to The blades 12 extend along the rotation direction of the arc-shaped fan, and the direction in which the air is thrown out is the same as the rotation direction of the arc-shaped fan. The function of high-speed throwing around, and the air inside the fan can be thrown out with greater power, thereby obtaining a larger air volume, and improving the circulation efficiency of hot air in the air fryer, thereby reducing the cooking time of food and improving the cooking quality. the goal of.

Specifically, the central connecting portion 11 and the blades 12 are integrally formed, and a connecting hole is formed in the center of the central connecting portion 11 for connecting with the main shaft of the motor. Meanwhile, in order to improve the strength of the entire fan, the central connecting portion 11 can be provided A ring of protruding ribs can be extended to the blade 12 in sequence, so that the position where the root of the blade 12 is connected to the central connecting portion 11 has sufficient strength.

As for the first fan surface 14, the first end of the first fan surface 14 extends to the free end of the blade 12, and the second end of the first fan surface 14 extends to the blade 12, so that the first fan surface 14 can utilize the length of the front edge of the blade 12 as much as possible, so as to maximize the effect of the first fan surface 14, and the upper edges of both ends of the first fan surface 14 are equal to each other. A circular arc transition is provided, which is conducive to the flow of air.

In this embodiment, as shown in FIGS. 1-3 , a second fan surface 13 is provided on the edge of the blade 12 on the rear side relative to the rotation direction of the arc-shaped fan. The second fan The surface 13 extends at least partially to the free end of the blade 12, and the second fan surface 13 is arranged opposite to the first fan surface 14, so that each blade 12 has two fan surfaces, and the rotation direction is Reference, the front is the first fan surface 14, and the rear is the second fan surface 13. The second fan surface 13 can divide the air flow at the outlet of the blade 12 and reduce the mixed flow at the outlet. To achieve a larger air output, the function of the first fan surface 14 and the second fan surface 13 is to increase the fan area, reduce the turbulent wind caused by airflow rebound, and make the air flow more regular. The length of the second fan surface 13 can be significantly shorter than that of the first fan surface 14, so that the airflow can be quickly divided by the second fan surface 13, and enough air outlets can also be reserved for the airflow to pass through.

Wherein, the height H1 of the first fan surface 14 is greater than the height H2 of the second fan surface 13, the height H1 of the first fan surface 14 can be set to 10mm-16mm, and the height H2 of the second fan surface 13 It can be set to 5mm-11mm, and the first fan surface 14 is higher than the second fan surface 13, which is conducive to the cooperation between the second fan surface 13 and the first fan surface 14, so that the airflow can be smoothly thrown out without causing The front and rear interference blocks, and the upper edges of the first fan surface 14 and the second fan surface 13 facing the root of the blade 12 are provided with inclined portions 15 , and the inclined portions 15 have the effect of guiding the flow.

In this embodiment, in order to facilitate the forming of the blade 12, the blade 12, the first fan surface 14 and the second fan surface 13 connected thereto are formed by bending a blank sheet, and the first The sum of the height H1 of the fan surface 14 and the height H2 of the second fan surface 13 is not greater than the circumferential spacing H between the adjacent blades 12, and such a setting can be formed by bending a blank sheet. The integral structure of the blade 12, the first fan surface 14 and the second fan surface 13 reduces the production cost of the fan, wherein the blank sheet is preferably a metal sheet, and the central connecting part can also be integrally formed.

In this embodiment, as shown in FIG. 4 , the angle between the blade 12 and the first fan surface 14 is not arbitrarily set. In order to achieve the best air output, the arc center angle of the first fan surface 14 θ=180°-(β ₁ +β ₂ )≦90°, wherein β ₁ is the inlet angle of the vane 12 , β ₂ is the outlet angle of the vane 12 , wherein the inlet angle β of the vane 12 The range of ₁ is 73°-77°, and the range of the outlet angle β ₂ of the blade 12 is 60°-65°. The range of β ₁ and β ₂ is the most reasonable, and this angle setting can achieve the best Air volume.

In a specific embodiment, the inlet angle β ₁ of the blade 12 can be set to 73°, and the value of the outlet angle β ₂ can be set to 60°, then the arc center angle of the first fan surface 14 θ=180°- (β ₁ +β ₂ )=180°−(73°+60°)=47°, so at this time, the arc center angle θ of the first fan surface 14 ≦90°.

It is also possible to set the inlet angle β ₁ of the blade 12 to 77°, and the value of the outlet angle β ₂ to be 65°, then the arc center angle θ of the first fan surface 14 is θ=180°-(β ₁ +β ₂ )=180°-(77°+65°)=38°, at this time, the arc center angle θ of the first fan surface 14 ≤ 90°.

Since the direction of the first fan surface 14 is along the rotation direction of the arc-shaped fan and is relatively constant, the arc center angle θ of the first fan surface 14 can determine the Therefore, the length of the first fan surface 14 can be adjusted according to the arc center angle θ within the range of 38°-47°. The length of the first fan surface 14 within this range can form a higher output. air volume.

In practice, the position of the inlet angle β ₁ of the blade 12 is connected to the central connecting portion 11 , so β ₁ can be set to a fixed value, and the value of the outlet angle β ₂ will vary according to the length of the first fan surface 14 . For example, the value of the outlet angle β ₂ was originally 65°, and the value of the inlet angle β ₁ was 77°. At this time, the arc center angle θ was 38°. When the first fan surface 14 was designed and lengthened, the outlet angle β ₂ The value of is reduced to 60°, and the value of the entrance angle β ₁ remains unchanged, so the central angle θ of the arc is 43°.

In this embodiment, an air fryer is also provided, which includes a body 1 and a cooking cavity 3 arranged inside the body 1. The cooking cavity 3 is installed with an arc-shaped fan as described in the above-mentioned embodiment. After the fan is installed, the circulation efficiency of the hot air blown into the cooking cavity 3 is improved, the cooking time can be shortened, and the taste of the food can be improved. Heated by the heating tube. Wherein, the arc-shaped fan may be arranged above the cooking cavity 3 , or on the sides of the surrounding area, or may be arranged below, as long as hot air circulation can be formed in the cooking cavity 3 .

这样的结构使得空气炸锅烹饪腔中的热空气在负压的作用下可以向上部风扇的中心出流动，进入风扇的热空气被甩出风扇并沿着风道板2散开并向下流向烹饪腔中。At the same time, as shown in Figures 5-6, an air duct plate 2 is arranged above the cooking cavity 3, and the top of the air duct plate 2 forms an inner cavity 4, and the arc fan is located in the inner concave In cavity 4, the diameter of the fan blade is adjusted according to the size of the air duct. The conventional diameter is

Such a structure enables the hot air in the cooking cavity of the air fryer to flow to the center of the upper fan under the action of negative pressure, and the hot air entering the fan is thrown out of the fan and spreads along the air duct plate 2 and flows downward. in the cooking cavity.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the The relative positional relationship between the components, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, descriptions such as "first", "second", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In the present invention, unless otherwise expressly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, "fixed" may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal communication between two elements or an interaction relationship between the two elements, unless otherwise explicitly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims (10)

1. A curved fan, comprising: a central connecting part (11); The blades (12) are evenly connected in the circumferential direction around the central connecting portion (11), and are characterized in that: The blade (12) is an arc-shaped structure as a whole, and the arc-shaped extension direction is the same as the rotation direction of the arc-shaped fan; The first fan surface (14) is vertically arranged on the surface of the blade (12), and the first fan surface (14) is deflected toward the rotation direction of the arc-shaped fan. 2. The arc-shaped fan according to claim 1, characterized in that: the first fan surface (14) is arranged on the edge of the blade (12) on the front side relative to the rotation direction of the arc-shaped fan, And the first fan surface (14) is perpendicular to the blade (12). 3. The arc-shaped fan according to claim 1, characterized in that: a second fan surface (13) is provided on the edge of the blade (12) on the rear side relative to the rotation direction of the arc-shaped fan, The second fan surface (13) extends at least partially to the free end of the blade (12). 4. The arc-shaped fan according to claim 1, characterized in that: the first end of the first fan surface (14) extends to the free end of the blade (12), and the first The second end of the fan surface (14) extends to the root of the blade (12). 5. The arc-shaped fan according to claim 3, wherein the height H1 of the first fan surface (14) is greater than the height H2 of the second fan surface (13). 6 . The arc-shaped fan according to claim 3 , wherein the blade ( 12 ), the first fan surface ( 14 ) and the second fan surface ( 13 ) connected to the blade ( 12 ) are composed of a blank sheet. 7 . It is formed by bending, and the sum of the height H1 of the first fan surface (14) and the height H2 of the second fan surface (13) is not greater than the circumferential spacing H between adjacent blades (12). 7. The arc-shaped fan according to claim 1, characterized in that: the arc center angle of the first fan surface (14) is θ=180°-(β ₁ +β ₂ )≦90°, wherein β1 is the inlet angle of the blade ( ₁₂ ), and β2 is the outlet angle of the blade (12). 8. The arc-shaped fan according to claim 7, characterized in that: the inlet angle β1 _of the blade (12) is in the range of 73°-77°, and/or the outlet of the blade (12) The angle β ₂ is in the range of 60°-65°. 9 . The arc-shaped fan according to claim 3 , wherein the upper edge of one end of the first fan surface ( 14 ) and the second fan surface ( 13 ) toward the root of the blade ( 12 ) is provided with a Inclined portion (15). 10. An air fryer, comprising a body (1) and a cooking cavity (3) arranged inside the body (1), wherein an air duct plate (2) is provided in the cooking cavity (3), characterized in that: The air duct plate (2) is provided with an inner cavity (4), and the arc fan according to any one of claims 1-9 is installed in the inner cavity (4).

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