Cold and hot air circulation integrated fan blade

Abstract

The utility model relates to an integrated fan blade for cold and hot air circulation, which is designed for solving the technical problems that the existing similar products rarely adopt the blade structural design of integrally forming cold air blades and hot air blades, and the structural design of matched plastic heat insulation layers and hardware heat insulation layers is not good enough. A body of the fan blade is a hardware fan blade formed by stamping and assembling a metal plate, and inclined grids which are distributed at equal intervals are respectively arranged on the cylindrical surface of a disc body of the body; the key point is that the disc surface at the other end of the body is provided with hot air blades which are integrally punched and bent outwards, the hot air blades and the punching forming holes in the disc surface at the position of the body are correspondingly rectangular, and the hot air blades are outwards distributed at equal intervals in a blade mode by taking the motor shaft insertion hole as the center; the edge step of the disc face of the body is limited in the center hole of the hardware heat insulation layer, the hot air blades of the body extend out of the center hole of the hardware heat insulation layer, the cold air blades of the body are located in the cold air channel of the plastic heat insulation layer, and the body is located between the hardware heat insulation layer and the plastic heat insulation layer.

Description

Technical Field

[0001] The utility model relates to a wind leaf of an air fryer, which is an integrated wind leaf for cold and hot air circulation. Background Art

[0002] An air fryer is a new type of household appliance that uses high-speed air circulation technology to fry food. The food made by it can reduce 80% of the grease compared with traditional electric fryers. It is easy to clean in daily use, safe and economical, and is favored by people. Some of the existing wind leaves in air fryers adopt an impeller type or a cross-flow wind leaf structure design of a wind wheel type. For example, the application number disclosed in the Chinese patent document is 201920952354.4, the authorization announcement date is May 26, 2023, and the utility model name is "A wind leaf and an air fryer with the wind leaf"; the blades protrude downward on the lower end surface of the turntable and are circumferentially arranged at intervals around the edge of the turntable. Each blade is inclined along the rotation direction of the turntable. An air outlet for making the passing air flow rotate is formed between adjacent two blades. An air inlet for air flow to enter is formed between the lower end surface of the turntable and each blade. However, the above products and similar products lack the structural design of hot air blades, and rarely adopt the blade structure in which cold air blades and hot air blades are integrally formed. At the same time, the structural design of such blade structures and the supporting plastic heat insulation layer and metal hardware heat insulation layer is not good, resulting in inconvenient assembly of components such as heating tubes, motors, exhaust ports, water vapor ports, fuses, positioning pins, micro switches, NTC temperature sensing probes, etc. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the utility model is to provide an integrated wind leaf for cold and hot air circulation to the field, so as to solve the technical problems that the existing similar products lack the structural design of hot air blades, rarely adopt the blade structure in which cold air blades and hot air blades are integrally formed, and at the same time, the structural design of such blade structures and the supporting plastic heat insulation layer and metal hardware heat insulation layer is not good, resulting in inconvenient assembly of components such as heating tubes, motors, exhaust ports, water vapor ports, fuses, positioning pins, micro switches, NTC temperature sensing probes, etc. Its purpose is achieved by the following technical solutions.

[0004] An integrated wind leaf for cold and hot air circulation, the body of the wind leaf is a metal hardware wind leaf formed by stamping and assembling metal plates. The body is a cylindrical disc. Oblique grids are equidistantly arranged on the cylindrical surface of the disc. The oblique grids are cold air blades formed by stamping and bending the metal plates. The interference press pieces protruding from the ends of the cold air blades are respectively inserted and bent and fixed to the annular guide vanes at one end of the body. The key point of the structural design is that a hot air blade integrally stamped and bent outward is provided on the other end surface of the body. The stamping holes on the hot air blade and the body are rectangular. The hot air blades are equidistantly distributed in a blade shape outward with the motor shaft jack as the center.

[0005] The edge step of the disk surface of the body is limited to the central hole of the hardware heat insulation layer. At the same time, the hot air blades of the body extend out of the central hole of the hardware heat insulation layer, the cold air blades of the body are located in the cold air channel of the plastic heat insulation layer, the body is located between the hardware heat insulation layer and the plastic heat insulation layer, and the motor shaft of the shaded pole motor of the plastic heat insulation layer is connected to the motor shaft jack of the body through the motor shaft. The above-mentioned body is connected with the plastic heat insulation layer and the hardware heat insulation layer and is arranged in the head of the machine body. The machine body is a small household appliance product such as an air fryer that requires both cold air blades and hot air blades at the same time.

[0006] The cold air channel of the plastic heat insulation layer sinks in a ring shape, and the inner wall of the cold air channel is provided with cold air inlet holes evenly distributed. The cold air inlet holes are aligned with the cold air blades of the body in the cold air channel. The shaded pole motor is arranged on the sunken motor fixing sink on the top of the plastic heat insulation layer. The motor shaft of the shaded pole motor is connected to the motor shaft jack of the body through the motor shaft through hole in the middle of the motor fixing sink of the plastic heat insulation layer. One side of the cold air channel of the plastic heat insulation layer is provided with a cold air discharge port.

[0007] The top and outer diameter of the plastic heat insulation layer are provided with protruding mounting posts. The cold air discharge port in the plastic heat insulation layer is communicated with the cold air channel and is raised upward to increase.

[0008] A boss and a circular groove at the step are formed by stamping on the top of the hardware heat insulation layer. The bottom notch of the plastic heat insulation layer is sleeved on the circular groove at the step of the top of the hardware heat insulation layer. One side of the central hole of the boss on the top of the hardware heat insulation layer is provided with a stamping hole for installing the fixed flange of one end of the heating tube.

[0009] The hardware heat insulation layer is provided with cold air ventilation holes, micro switch through holes, water vapor discharge holes, heating tube clamp fixing holes, fuse fixing holes, NTC temperature sensor probe fixing holes, positioning pin through holes and / or screw through holes formed by stamping.

[0010] The outer edge of the hood at the bottom of the hardware heat insulation layer is turned outwards and is provided with the cold air ventilation holes, the micro switch through holes and the positioning pin through holes formed by stamping. The boss on the top of the hardware heat insulation layer is provided with the NTC temperature sensor probe fixing holes and the screw through holes formed by stamping. The circumferential surface between the hood and the boss of the hardware heat insulation layer is provided with the water vapor discharge holes and the fuse fixing holes formed by stamping.

[0011] The circumferential surface of the hardware heat insulation layer between the hood and the boss is provided with the heating tube clamp fixing holes formed by stamping at one side of the cut edge groove.

[0012] The disk surface of the body is provided with a retaining piece fixing jack and / or a rivet fixing hole formed by stamping. The above-mentioned retaining piece fixing jack and rivet fixing hole are used to install the retaining piece to prevent hot air from entering the cold air area.

[0013] The outer diameter edge of the disk surface at the cold air blade of the body is trapezoidally convex, and the cold air blades are respectively arranged on one inclined side of the trapezoidal convex.

[0014] The blade structure of the present utility model is reasonably designed, convenient for production and manufacturing, and convenient for supporting use with a plastic heat insulation layer and a metal hardware heat insulation layer; it is suitable for use as an integrated hot and cold air circulation impeller for products such as air fryers, and for the structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 is Figure 1 an exploded state bottom structural schematic diagram of...

[0017] Reference Numerals and Names of the Drawings: 1. Body, 101. Interference press piece, 102. Flow guide piece, 103. Cold air blade, 104. Retaining piece fixing jack, 105. Rivet fixing hole, 106. Motor shaft jack, 107. Stamping forming hole, 108. Hot air blade, 2. Plastic heat insulation layer, 201. Cold air inlet hole, 202. Motor fixing counterbore, 203. Motor shaft through hole, 204. Cold air discharge port, 3. Metal hardware heat insulation layer, 301. Cold air ventilation hole, 302. Microswitch through hole, 303. Water vapor discharge hole, 304. Heating tube clamp fixing hole, 305. Fuse fixing hole, 306. NTC temperature sensor fixing hole, 307. Locating pin through hole, 308. Screw through hole. EMBODIMENT

[0018] Now, with reference to the drawings, the structure and use of the present utility model will be further described. As Figure 1 and Figure 2 shown, the body 1 of the impeller is a metal hardware impeller formed by stamping and assembling metal plates. The body is a cylindrical disc, and the cylindrical surface of the disc is respectively provided with equally spaced oblique grids. The oblique grids are cold air blades 103 formed by stamping and bending the metal plates. The interference press pieces 101 protruding from the ends of the cold air blades are respectively inserted and bent and fixed to the annular flow guide pieces 102 at one end of the body; on the other end surface of the body, there is a hot air blade 108 integrally stamped and bent outward. The stamping forming holes 107 on the hot air blade and the body surface are correspondingly rectangular, and the hot air blades are equally spaced in a blade shape outward with the motor shaft jack 106 as the center. The outer diameter edge of the surface of the body where the cold air blades are located is in a trapezoidal protrusion, and the cold air blades are respectively arranged on one inclined side of the trapezoidal protrusion; the surface of the body is provided with retaining piece fixing jacks 104 and / or rivet fixing holes 105 formed by stamping. While the edge step on the surface of the body is limited to the central hole of the metal hardware heat insulation layer 3, the hot air blades of the body extend out of the central hole of the metal hardware heat insulation layer, the cold air blades of the body are located in the cold air channel of the plastic heat insulation layer 2, the body is located between the metal hardware heat insulation layer and the plastic heat insulation layer, and the motor shaft of the shaded pole motor through the plastic heat insulation layer is connected to the motor shaft jack of the body.

[0019] The specific structures of the above-mentioned plastic heat insulation layer and metal heat insulation layer are as follows: The cold air channel of the plastic heat insulation layer sinks in a circular shape. The inner wall of the cold air channel is provided with cold air inlet holes 201 evenly distributed. The cold air inlet holes are aligned with the cold air blades in the main body of the cold air channel. The shaded-pole motor is arranged on the motor fixing sink 202 sunken at the top of the plastic heat insulation layer. The motor shaft of the shaded-pole motor is connected to the motor shaft jack of the main body through the motor shaft through-hole 203 in the middle of the motor fixing sink at the plastic heat insulation layer. A cold air discharge port 204 is arranged on one side of the cold air channel of the plastic heat insulation layer; the top and outer diameter of the plastic heat insulation layer are provided with protruding mounting posts. The cold air discharge port in the plastic heat insulation layer communicates with the cold air channel and is raised upward to increase.

[0020] The top of the above-mentioned metal heat insulation layer is stamped to form a boss and a circular groove at the step. The bottom notch of the plastic heat insulation layer is sleeved on the circular groove at the step at the top of the metal heat insulation layer. One side of the central hole at the boss at the top of the metal heat insulation layer is provided with a stamping hole for installing a fixed flange at one end of the heating tube. The metal heat insulation layer is provided with cold air ventilation holes 301, microswitch through-holes 302, water vapor discharge holes 303, heating tube clamp fixing holes 304, fuse fixing holes 305, NTC temperature sensor fixing holes 306, positioning pin through-holes 307 and / or screw through-holes 308 formed by stamping, that is, the above hole positions are set according to the actual component installation needs. For example: The outer edge of the cover at the bottom of the metal heat insulation layer is turned outwards and provided with the cold air ventilation holes, the microswitch through-holes and the positioning pin through-holes formed by stamping. The boss at the top of the metal heat insulation layer is provided with the NTC temperature sensor fixing holes and the screw through-holes formed by stamping. The circumferential surface between the cover and the boss of the metal heat insulation layer is provided with the water vapor discharge holes and the fuse fixing holes formed by stamping; the heating tube clamp fixing hole 304 is formed by stamping at the cut-edge groove on one side of the circumferential surface between the cover and the boss of the metal heat insulation layer.

[0021] The wind blade is integrally formed and stamped with two functional blades: cold air blades and hot air blades; among them, the function of the cold air blades is to be responsible for the cold air circulation inside the whole machine, cool the internal components and cool the outer shell of the whole machine, while the function of the hot air blades is to be responsible for the hot air circulation in the cooking area and bake the food efficiently. At the same time, after the wind blade is formed, it includes features such as stamping holes and interference fit sheets. Its circular guide vane is fixed above the cold air blade through the interference fit sheet to play a guiding role; the above-mentioned baffle fixing jacks and rivet fixing holes are used to install a baffle (not shown in the figure) to prevent hot air from entering the cold air area; the motor shaft through-hole is convenient for the motor shaft to pass through and drive it to rotate at high speed.

[0022] The number of cold air blades of this wind blade is 27, but the number is not limited to this. It can be adjusted according to the requirements for noise and air volume, generally ranging from 20 to 30. The number of hot air blades is 6, but the number is not limited to this either. It can be adjusted according to the requirements for noise and air volume, generally ranging from 4 to 7.

Claims

1. A hot and cold air circulation integrated fan blade, the main body (1) of the fan blade is a hardware fan blade formed by stamping and assembling metal plates, the main body is a cylindrical disk, the cylindrical surface of the disk is respectively provided with equidistantly distributed oblique grids, the oblique grids are cold air blades (103) formed by stamping and bending the metal plates, and the protruding interference pressing pieces (101) at the ends of the cold air blades are respectively inserted into and bent and fixed to the annular guide pieces (102) at the disk opening at one end of the main body; characterized in that The other end disk of the body (1) is provided with hot air blades (108) formed by integrally stamping and bending outwards, the hot air blades and the stamped holes (107) on the disk of the body correspondingly being rectangular, and the hot air blades being equidistantly distributed outwards in a blade-like manner with the motor shaft insertion hole (106) as the centre.

2. The integrated cold and hot air circulation fan blade according to claim 1 is characterized in that The edge step of the disk surface of the body (1) is limited to the center hole of the hardware insulation layer (3), and the hot air blades (108) of the body extend out of the center hole of the hardware insulation layer. The cold air blades (103) of the body are located in the cold air channel of the plastic insulation layer (2). The body is located between the hardware insulation layer and the plastic insulation layer, and is connected to the motor shaft of the shaded pole motor of the plastic insulation layer through the motor shaft jack (106) of the body.

3. The integrated cold and hot air circulation fan blade according to claim 2 is characterized in that The cold air channel of the plastic heat insulation layer (2) is sunken in a ring shape, and the inner wall of the cold air channel is provided with cold air inlet holes (201) distributed at equal intervals, and the cold air inlet holes are aligned with the cold air blades (103) of the body (1) in the cold air channel. The shaded-pole motor is arranged on a motor fixing sinking platform (202) sunken at the top of the plastic heat insulation layer, and the motor shaft of the shaded-pole motor is connected to the motor shaft jack (106) of the body through the motor shaft through hole (203) in the middle of the motor fixing sinking platform on the plastic heat insulation layer, and a cold air outlet (204) is provided on one side of the cold air channel of the plastic heat insulation layer.

4. The integrated cold and hot air circulation fan blade according to claim 3 is characterized in that The top and outer diameter of the plastic heat insulation layer (2) are provided with raised mounting columns, and the cold air outlet (204) in the plastic heat insulation layer is connected to the cold air channel and is raised and enlarged upwards.

5. The integrated cold and hot air circulation fan blade according to claim 2 is characterized in that The top of the metal insulation layer (3) is punched to form a boss and a circular groove at the step, the bottom notch of the plastic insulation layer (2) is sleeved into the circular groove at the top step of the metal insulation layer, and a punching hole for mounting a fixing flange at one end of the heating pipe is provided on one side of the center hole at the top boss of the metal insulation layer.

6. The integrated cold and hot air circulation fan blade according to claim 5 is characterized in that The hardware heat insulation layer (3) is provided with cold air ventilation holes (301) formed by stamping, micro switch holes (302), water vapor discharge holes (303), heating tube clamp fixing holes (304), fuse fixing holes (305), NTC temperature sensor probe fixing holes (306), positioning pin holes (307) and / or screw holes (308).

7. The integrated cold and hot air circulation fan blade according to claim 6 is characterized in that The cover opening at the bottom of the metal insulation layer (3) is turned outward and provided with the cold air ventilation hole (301), the micro switch through hole (302) and the positioning pin through hole (307) formed by stamping, the boss at the top of the metal insulation layer is provided with the NTC temperature sensor probe fixing hole (306) and the screw through hole (308) formed by stamping, and the peripheral surface between the cover opening of the metal insulation layer and the boss is provided with the water vapor discharge hole (303) and the fuse fixing hole (305) formed by stamping.

8. The integrated cold and hot air circulation fan blade according to claim 6 is characterized in that The heating pipe clamp fixing hole (304) formed by stamping is provided at the trimming groove on one side of the peripheral surface between the cover opening and the boss of the hardware heat insulation layer (3).

9. The integrated cold and hot air circulation fan blade according to claim 1, characterized in that The disk surface of the body (1) is provided with a baffle fixing insertion hole (104) and / or a rivet fixing hole (105) formed by stamping.

10. The integrated cold and hot air circulation fan blade according to claim 1, characterized in that The outer diameter edge of the disk surface at the cold air blades (103) of the body (1) is in the form of a trapezoidal protrusion, and the cold air blades are respectively arranged on one side of the inclined edge of the trapezoidal protrusion.

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