Impeller and air fryer thereof

Abstract

The utility model relates to an impeller and an air fryer thereof, and aims to solve the technical problems of poor dehydration effect during cooking and poor non-enzymatic browning effect on the surface of food caused by poor structural design of hot air fan blades of the conventional like products. A body of the impeller is an open type radial centrifugal impeller, blades which are formed through stamping and are triangular on the same plane are distributed on the body at equal intervals by taking a shaft hole as the center, main blades which are formed through 90-degree stamping and bending are arranged on the edge of at least one side of each blade, and each main blade is in a right trapezoid shape; the blade is characterized in that an auxiliary blade which is formed in a right triangle stamping and bending mode is arranged on the edge of the other side symmetrical to the main blade of the body, and the edge of the right-angle side of the main blade is lower than the edge of the right-angle side of the auxiliary blade. The right-angle side edge of the main blade and the right-angle side edge of the auxiliary blade are symmetrically arranged on the two sides of the outer diameter end of the blade of the body. The included angle between the main blade of the body and the eight auxiliary blades ranges from 16 degrees to 24 degrees.

Description

TECHNICAL FIELD

[0001] The utility model relates to an impeller of air fryer, and is an impeller and air fryer thereof. BACKGROUND

[0002] Air fryer is a new type of household appliance which uses high-speed air circulation technology to fry food, and the food made by the air fryer can reduce 80% of oil compared with traditional electric fryer, is easy to clean in daily use, safe and economical, and is favored by people. Among them, the product performance, product form and cooking performance which determine the heating and cooking effect of the air fryer are as follows: 1. Product performance: energy efficiency, temperature field, wind field and noise, wherein the structure and speed of the fan affect the above performance. Energy efficiency: the greater the air volume, the higher the convection coefficient, and the higher the energy efficiency of the heating pipe; Wind field: the higher the wind speed, the smaller the turbulent diameter, and the more uniform the wind field; Temperature field: the air fryer with metal pipe mainly transmits energy in the form of forced convection, and the more uniform the wind field, the more uniform the temperature field of the product; Noise: the conventional sheet metal impeller is mainly designed with a main impeller, so that the distance between the blades is relatively far, the turbulent diameter between the blades is relatively large, and the noise of the air fryer is relatively large. 2. Product form: the traditional air fryer is mainly square in shape, and a small amount is circular; in order to reduce the floor area of the air fryer and improve the aesthetic appearance, more and more air fryers in the form of rectangle are used, but the performance of the air fryer in the form of rectangle is often not as good as that of the air fryer in the form of circle or square. 3. Cooking performance: 1. Promote non-enzymatic browning: the wind can take away a large amount of water on the surface of the food, so that the surface of the food is quickly dehydrated, the surface temperature of the food is increased, non-enzymatic browning and hard shell are generated, and the food cooked in this way is crisp on the outside and soft on the inside, and has full aroma; 2. Rapid dehydration: strong wind field intensity is required for some cooking scenes such as air drying (overall dehydration), roasting potato chips (dehydration of 45%), and roasting meat (surface dehydration); 3. Industry status: 3.1: more than 95% of air fryers use open radial centrifugal impellers, such as the air fryer disclosed in Chinese patent document No. 201820001542.4, application publication date 2018.1026, and utility model name "air fryer blade"; advantages: low cost, high wind speed, and small central vortex; disadvantages: small air volume. 3.2: a part of high-end air fryers use closed rear bending centrifugal impellers, advantages: high wind speed and large air volume; disadvantages: high cost and large central vortex. SUMMARY

[0003] In order to overcome the above-mentioned defects, the utility model aims at providing an impeller and air fryer thereof to solve the technical problems that the heat air blade structure design of the existing similar products is poor, resulting in poor performance of energy efficiency, wind field and temperature field, and poor cooking effect, especially poor dehydration effect and non-enzymatic browning effect on the surface of food. The purpose is achieved through the following technical solutions.

[0004] A kind of impeller, the body of the impeller is open radial centrifugal impeller, the center of the body is provided with shaft hole, the body is provided with the blade of stamping formation and same plane triangle equidistantly distributed with shaft hole as center, at least one side edge of the blade is provided with the main blade of 90 degree stamping bending molding, the main blade is right-angled trapezoidal;Its structural design key points are that the main blade of the body is provided with the auxiliary blade of right-angled triangle stamping bending molding on the other side edge of symmetry, the height of the right angle side edge of the main blade is lower than the height of the right angle side edge of auxiliary blade, the right angle side edge of the main blade and the right angle side edge of auxiliary blade are symmetrically arranged at the outer diameter end of the blade of the body.The body of the above structure is better and more prominent for similar products in need of counterclockwise or clockwise two working states, the main power of fluid is provided by the main blade, the auxiliary blade is used to interfere and chop the large diameter turbulence generated by impeller, reduce noise, enhance fluid strength;That is, the auxiliary blade is open impeller, the main blade is semi-open impeller, the efficiency of the above two combined as semi-open impeller is higher than open impeller when rotating clockwise, when counterclockwise, the main blade becomes open impeller, and the energy efficiency will be reduced.

[0005] The body is provided with eight main blades and eight auxiliary blades equidistantly arranged with shaft hole as center.

[0006] The included angle between the main blade and auxiliary blade of the body is 16°-24°.The optimal included angle between the main blade and eight auxiliary blades of the above body is 20°.

[0007] The auxiliary blade of the body is provided with a rectangular notch formed by stamping below the hypotenuse of the triangular blade edge, and the two side edges of the rectangular notch are recessed inward to form an included angle of 175 degrees.

[0008] The triangular blade of the body is provided with a triangular groove formed by stamping, and the triangular groove is integrally formed with the special-shaped groove at the middle of the body.

[0009] According to the above structural characteristics, an air fryer using the impeller is provided, the body of the air fryer is provided with the body and a heating pipe in the groove of the flow guide cover above the pot body of the inner basket assembly at one side opening, the transmission shaft at the motor of the top of the flow guide cover is connected with the shaft hole of the body by penetrating the flow guide cover, and the rear slot of the flow guide cover is connected with the exhaust cover of the body;The feature is that the groove of the flow guide cover is provided with flow guide inclined surfaces symmetrically arranged on the front and rear sides, the outer diameter of the groove of the flow guide cover is provided with a skirt formed by stamping, and the skirt of the flow guide cover seals the lining opening above the pot body of the inner basket assembly.Thereby, the flow guide cover uses the Coanda effect to make the fluid flow into the pot body, and improves the fluid efficiency.

[0010] The motor is arranged at the hollow hole of the heat dissipation cover on the top of the fairing, the heat dissipation cover is internally provided with a heat dissipation fan blade, a transmission shaft of the motor is connected with the heat dissipation fan blade and the shaft hole of the body through the heat dissipation cover and the fairing, and the rear notch of the heat dissipation cover and the rear notch of the fairing are connected with the exhaust cover of the body.

[0011] The blade structure is reasonable in design, convenient to produce and manufacture, wide in application range, and good in energy efficiency, wind field and temperature field performance, so that the cooking effect is improved, the dehydration effect is good during cooking, and the non-enzyme browning effect on the surface of food is good. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic diagram of the internal structure of the use state part of the utility model Figure 1 , the fairing and the heat dissipation cover are omitted, and the dashed line is part of the body structure.

[0013] Figure 2 is Figure 1 the internal motor, the body and the heat dissipation fan blade connection state enlarged structure schematic diagram.

[0014] Figure 3 is Figure 2 the body three-dimensional structure schematic diagram.

[0015] Figure 4 is Figure 3 the bottom three-dimensional structure schematic diagram.

[0016] Figure 5 is Figure 3 the side view structure schematic diagram.

[0017] Figure 6 is Figure 5 the bottom view structure schematic diagram.

[0018] Figure 7 is a schematic diagram of the internal structure of the use state part of the utility model Figure 2 , the fairing is added.

[0019] Figure 8 is Figure 7 the fairing enlarged three-dimensional structure schematic diagram.

[0020] Figure 9 is a flow simulation effect comparison diagram of the utility model and the existing open radial centrifugal impeller, which includes ZX section, ZY section and XY-145 section.

[0021] The attached figures are numbered and named as follows: 1. Body, 101. Shaft hole, 102. Blade, 103. Main blade, 104. Auxiliary blade, 105. Rectangular notch, 2. Body, 3. Flow guide, 301. Flow guide slope, 302. Skirt, 4. Heat sink, 5. Motor. Detailed Implementation

[0022] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-9 As shown, the impeller body 1 is an open radial centrifugal impeller. The body has a shaft hole 101 at its center. Blades 102, which are formed by stamping and are triangular in the same plane, are equidistantly distributed around the shaft hole. At least one side of each blade has a main blade 103 formed by stamping and bending at 90 degrees. The main blade is a right trapezoid. The other side of the main blade is symmetrically provided with an auxiliary blade 104 formed by stamping and bending a right triangle. The height of the right-angled side of the main blade is lower than the height of the right-angled side of the auxiliary blade. The right-angled side of the main blade and the right-angled side of the auxiliary blade are symmetrically arranged on both sides of the outer diameter end of the blade of the body.

[0023] Furthermore, the aforementioned body is provided with eight main blades and eight auxiliary blades equidistantly arranged around the shaft hole. The included angle between the main blades and the auxiliary blades is 20°. The triangular edges of the auxiliary blades on the lower side of the body are respectively provided with stamped rectangular notches 105, the two sides of which are recessed inward at a 175-degree angle. The triangular blades of the body are provided with stamped triangular grooves, which are integrally formed and communicate with the irregular groove in the middle of the body.

[0024] The structure of the above-mentioned body applied to the corresponding air fryer embodiment is as follows: The air fryer body 2 has an opening on one side, and the air fryer basket assembly has an inner shroud 3 above the pot body containing the body and a heating tube. The drive shaft of the motor 5 at the top of the shroud passes through the shroud and connects to the shaft hole of the body. The rear slot of the shroud connects to the exhaust hood of the body. The upward-protruding groove of the shroud has symmetrically arranged guide slopes 301 on both the front and rear sides. The outer diameter of the groove opening of the shroud has a stamped skirt 302, which seals the inner lining opening above the pot body of the air fryer basket assembly. The motor is located at the hollowed-out hole of the heat dissipation shroud 4 at the top of the shroud. The heat dissipation shroud contains heat dissipation fan blades. The drive shaft of the motor is connected to the heat dissipation fan blades and the shaft hole of the body through the heat dissipation shroud and the shroud. The rear slots of the heat dissipation shroud and the rear slots of the shroud connect to the exhaust hood of the body.

[0025] The air fryer has the following characteristics: 1) reducing noise: the environment is more quiet when the air fryer is used; 2) improving product performance: improving product performance without increasing product cost, and providing better use experience for consumers; 3) the fluid strength of the grill position in the pot body is greatly improved, and the qualified rate of cooking potato chips is increased from 60% to 80%, and the performance is greatly improved.

[0026] The above is intended to illustrate the technical means of the present application, and is not intended to limit the technical range of the present application. Those skilled in the art can make obvious improvements or replacements to the present application in combination with the existing common knowledge, which also falls within the protection scope of the claims of the present application.

Claims

1. A kind of impeller, the body (1) of the impeller is open radial centrifugal impeller, the center of the body is provided with shaft hole (101), the body is provided with the blade (102) of punch forming and same plane triangle equidistantly distributed with shaft hole as center, at least one side edge of the blade is provided with the main blade (103) of 90 degree punch bending molding, the main blade is right trapezoidal;Its characterized in that The main blade (103) of the body (1) is provided with an auxiliary blade (104) formed by punching and bending in a right triangle shape on the other side edge, the height of the right angle side edge of the main blade is lower than that of the auxiliary blade, and the right angle side edges of the main blade and the auxiliary blade are symmetrically arranged on both sides of the outer diameter end of the blade (102) of the body.

2. The impeller of claim 1, wherein The body (1) is provided with eight main blades (103) and eight auxiliary blades (104) arranged equidistantly and centered on the shaft hole (101).

3. Impeller according to claim 1 or 2, characterized in that The included angle between the main blade (103) and the auxiliary blade (104) of the body (1) is 16°-24°.

4. The impeller of claim 1, wherein The blade (102) of the triangle shape below the hypotenuse of the auxiliary blade (104) of the body (1) is provided with a rectangular notch (105) formed by punching, and the two side edges of the rectangular notch are recessed inward by 175 degrees.

5. The impeller of claim 1, wherein The triangular groove formed by punching is provided at the triangular blade (102) of the body (1), and the triangular groove is integrally formed with the special-shaped groove at the middle of the body.

6. An air fryer using the impeller according to any one of claims 1-5, wherein a hollow body (2) of the air fryer is provided with the body (1) and a heating tube in a recess of a flow guide cover (3) above a basket of the air fryer, a transmission shaft of a motor (5) at a top of the flow guide cover penetrates the flow guide cover and is connected to a shaft hole (101) of the body, and a rear slot of the flow guide cover is connected to an air outlet cover of the hollow body. The upwardly protruding groove of the fairing (3) is provided with a guide slope (301) symmetrically arranged on the front and rear sides, and the outer diameter of the groove of the fairing is provided with a skirt (302) formed by punching, which seals the lining opening above the pot body of the basket assembly.

7. The impeller air fryer of claim 6, wherein The motor (5) is arranged at the hollow hole of the heat dissipation cover (4) at the top of the fairing (3), the heat dissipation cover is provided with heat dissipation blades, the transmission shaft of the motor is connected with the heat dissipation blades, the heat dissipation cover and the fairing through the heat dissipation cover, the fairing and the shaft hole (101) of the body, and the rear slot of the heat dissipation cover and the rear slot of the fairing are connected with the exhaust cover of the machine body.

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