The cold air system of the new top and bottom top blowing type double pot air fryer

Abstract

This utility model relates to a novel top-and-bottom blowing type double-pot air fryer's cold air system, addressing the technical problem of poor heat dissipation in existing similar products due to the difficulty in simultaneously processing and cooking food at high temperatures using top-and-bottom blowing methods within the upper and lower cavities, resulting in poor airflow guidance at the top of the unit. The key features are: a base is provided at the bottom opening of the air fryer's body; the outer plane of the central boss on the base has bottom openings equidistantly arranged around the boss; the lower opening of the upper metal liner connects to the top outer diameter of the plastic partition to form an upper metal liner cavity; the lower opening of the lower metal liner connects to the top outer diameter of the plastic base plate to form a lower metal liner cavity; the bottom opening of the base exposes the plastic base plate; the tops of the lower and upper plastic air guides each have exposed waist-shaped openings; the upper opening of the lower metal liner connects to the bottom outer diameter of the plastic partition plate; the liner of the upper and lower frying basket assemblies communicates with the cold air channel inside the unit.

Description

Technical Field

[0001] This utility model relates to an air fryer, specifically a novel top-and-bottom top-blowing double-pot air fryer with a cold air system. Background Technology

[0002] An air fryer is a new type of household appliance that uses high-speed air circulation technology to fry food. Compared to traditional fryers, it reduces oil content by up to 80%, is easy to clean, and is both safe and economical, making it very popular. To improve efficiency, some air fryers feature double-layered or double-layered designs, with some employing a double-layered body and pot structure. Both the upper and lower layers utilize top-heating and airflow from the pots, as seen in Chinese patent application publication number CN118948131A, published on November 15, 2024, entitled "A Dual-Cavity Air Fryer." However, these products and similar products suffer from poor internal cold air circulation and heat dissipation. Specifically, they are difficult to heat dissipate using the top-heating method in both upper and lower cavities, resulting in poor airflow at the top of the unit. Summary of the Invention

[0003] To overcome the above shortcomings, the purpose of this utility model is to provide a novel cold air system for a top-and-bottom blower double-pot air fryer, solving the technical problem of poor cold air circulation and heat dissipation in the internal partition of existing top-and-bottom blower double-pot air fryers. Specifically, it addresses the difficulty in heat dissipation for simultaneous high-temperature food processing and cooking using top-blowing methods in both the upper and lower cavities, resulting in poor airflow guidance in the upper part of the unit. This objective is achieved through the following technical solution.

[0004] A novel top-and-bottom blowing type double-pot air fryer's cold air system includes a main body, an upper frying basket assembly, and a lower frying basket assembly. The upper and lower frying basket assemblies, which house upper and lower metal lining cavities, are respectively located at the upper and lower openings on one side of the main body. The cold air system chambers within the main body are interconnected via a central plastic partition, forming interconnected upper and lower metal lining cavities. The upper frying basket assembly has an upper handle on the outer side of its inner lining, and an upper grill rack is located inside the upper pot on the inner side of its inner lining. The lower frying basket assembly has a handle on the outer side of its inner lining. The lower frying basket assembly features a lower handle and a lower grill rack inside the lower pot body within the frying basket liner. Its key structural design features an upper heating element and an upper metal centrifugal fan blade sequentially arranged within a groove in the upper metal insulation layer above the upper pot body of the upper frying basket assembly. An upper plastic centrifugal fan blade is located within an upper plastic air guide hood at the top of the upper metal insulation layer inside the machine body. The motor shaft at the upper motor at the top of the upper plastic centrifugal fan blade connects to the upper plastic centrifugal fan blade and the upper metal centrifugal fan blade. Similarly, a lower heating element and a lower centrifugal fan blade are sequentially arranged within a groove in the lower metal insulation layer above the lower pot body of the lower frying basket assembly. Inside the machine body… The lower plastic centrifugal fan blades are installed inside the lower plastic air guide hood at the top of the lower metal heat insulation layer. The motor shaft at the lower motor at the top of the lower plastic centrifugal fan blades is connected to the lower plastic centrifugal fan blades and the lower metal centrifugal fan blades. A base is provided at the bottom opening of the outer shell of the machine body. The outer plane of the protrusion in the middle of the base has bottom openings that are equidistantly arranged around the protrusion. The cover opening of the upper metal heat insulation layer is connected to the upper lining opening of the upper metal lining on the outside of the upper frying basket assembly inside the machine body. At the same time, the lower lining opening of the upper metal lining is connected to the top outer diameter of the plastic partition to form the upper metal lining cavity. The opening connects to the upper lining opening of the lower metal lining on the outside of the lower frying basket assembly inside the machine. Simultaneously, the lower lining opening connects to the top outer diameter of the plastic base plate on the base, forming a lower metal lining cavity. The bottom opening of the base exposes the plastic base plate. The tops of the lower and upper plastic air guides each have exposed waist-shaped openings. The upper lining opening of the lower metal lining connects to the bottom outer diameter of the plastic partition. The upper and lower openings along the edges of the frying basket linings of the upper and lower frying basket assemblies communicate with the channel openings on the upper and lower sides of the machine body, as well as the corresponding openings on the plastic partition and the base. Thus, the aforementioned cold air passage inside the machine forms a circulating heat dissipation system through the base and plastic partition, reducing the temperature of the cold air passage inside the machine and ensuring normal operation and safe use of the machine.

[0005] The bottom of the plastic partition protrudes downwards, and the circumference of the cover opening has rectangular openings arranged longitudinally at equal intervals.

[0006] The bottom of the plastic partition has a downward protrusion at one side or rear of the hood opening, and the air outlets of the upper and lower plastic air guides are respectively connected to the exhaust holes on one side or rear of the machine body. The lower plastic air guide is connected to the exhaust holes on one side or rear of the machine body through the lower air guide opening of the plastic partition.

[0007] The bottom of the plastic partition has downward protrusions at the circumference of the cover opening, and the upper and lower outer diameters are respectively provided with equally spaced and protruding screw mounting posts. The screw mounting posts are protruding at both ends of the rectangular opening. The plastic partition is connected to the upper hardware liner and the lower hardware liner as a whole through the screw mounting posts.

[0008] The top flat groove of the plastic partition is provided with an upper metal heat insulation liner that is integrated with the bottom of the upper metal heat insulation layer. The top of the plastic base plate is provided with a lower metal heat insulation liner that is integrated with the bottom of the lower metal heat insulation layer. The top of the lower metal heat insulation liner is provided with a raised rib corresponding to the bottom rib groove of the lower pot body.

[0009] The two guide ribs symmetrically arranged on the top of the plastic partition extend out through the upper metal heat insulation liner. The guide grooves symmetrically arranged on both sides of the bottom of the upper pot body fit into the guide ribs of the plastic partition. The top of the lower metal heat insulation liner is provided with a convex rib corresponding to the bottom groove of the lower pot body.

[0010] The front panel of the plastic partition is flush with the openings at the top and bottom of the machine body, or the front edge of the plastic partition is located at the top and bottom openings of the machine body.

[0011] The upper frying basket assembly has a PCB control component above the opening on one side of the machine body. On the other side of the PCB control component, at the rear corner, there is a power board assembly inside the machine body. The power board assembly, the upper heating element, the lower heating element, the lower motor, and the upper motor are connected to the PCB control component inside the machine body through wiring.

[0012] This utility model has a simple and reasonable structural design, good heat dissipation and cooling effect, long service life, and good safety and stability; it is suitable for use as the cooling system of a new type of top-and-bottom blower double-pot air fryer, as well as for structural improvements of similar products. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the upper frying basket assembly in the open state in an embodiment of this utility model.

[0014] Figure 2 yes Figure 1 A cross-sectional view of the upper frying basket assembly after it has been placed inside.

[0015] Figure 3 yes Figure 2 A schematic diagram of the internal structure of the rear part of the fuselage in cross-section.

[0016] Figure 4 yes Figure 3 A schematic diagram of the working principle and structure of the internal cooling system of the machine.

[0017] Figure 5 yes Figure 3 A schematic diagram of the three-dimensional structure of the plastic partition.

[0018] Figure 6 yes Figure 3 A schematic diagram of the three-dimensional structure of the base.

[0019] Attached diagrams and their corresponding numbers and names: 1. Main body; 2. Upper frying basket assembly; 3. Lower frying basket assembly; 4. PCB control assembly; 5. Upper metal heat insulation layer; 6. Upper heating element; 7. Upper handle; 8. Upper pot body; 9. Upper grill rack; 10. Lower metal heat insulation layer; 11. Lower heating element; 12. Lower handle; 13. Lower pot body; 14. Lower grill rack; 15. Lower metal centrifugal fan blade; 16. Lower plastic centrifugal fan blade; 17. Lower motor. 18. Upper metal centrifugal fan blade; 19. Upper plastic centrifugal fan blade; 20. Power board assembly; 21. Upper motor; 22. Upper plastic air guide cover; 23. Upper metal liner; 24. Plastic partition; 2401. Rectangular opening; 2402. Lower air guide cover opening; 2403. Screw mounting post; 25. Lower plastic air guide cover; 26. Lower metal liner; 27. Base; 2701. Bottom opening; 28. Plastic base plate. Implementation

[0020] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figure 1-6As shown, the air fryer with the cold air system includes a body 1, an upper frying basket assembly 2, and a lower frying basket assembly 3. The upper and lower frying basket assemblies are respectively provided at the upper and lower openings on one side of the body, and the upper and lower hardware lining cavities are respectively placed inside the upper and lower openings. The cold air system chamber channel inside the body is connected to the upper and lower openings through the middle plastic partition 24 to form the upper and lower hardware lining cavities. The upper frying basket assembly has an upper handle 7 on the outside of the frying basket lining, and an upper grill rack 9 is provided in the upper pot body 8 inside the frying basket lining of the upper frying basket assembly. The lower frying basket assembly has a lower handle 12 on the outside of the frying basket lining, and a lower grill rack 14 is provided in the lower pot body 13 inside the frying basket lining of the lower frying basket assembly. Meanwhile, in the upper pot body of the upper frying basket assembly, the upper heating tube 6 and the upper metal centrifugal fan 18 are arranged sequentially in the five grooves of the upper metal heat insulation layer. The upper plastic centrifugal fan 19 is arranged in the upper plastic air guide hood 22 at the top of the upper metal heat insulation layer inside the machine body. The motor shaft at the upper motor 21 at the top of the upper plastic centrifugal fan is connected to the upper plastic centrifugal fan and the upper metal centrifugal fan. In the lower pot body 13 of the lower frying basket assembly, the lower heating tube 11 and the lower metal centrifugal fan 15 are arranged sequentially in the ten grooves of the lower metal heat insulation layer. The lower plastic centrifugal fan 16 is arranged in the lower plastic air guide hood 25 at the top of the lower metal heat insulation layer inside the machine body. The motor shaft at the lower motor 17 at the top of the lower plastic centrifugal fan is connected to the lower plastic centrifugal fan and the lower metal centrifugal fan. A base 27 is provided at the bottom opening of the outer shell of the machine body. The outer surface of the boss in the middle of the base has bottom openings 2701 arranged equidistantly around the boss. Simultaneously, the cover opening of the upper metal heat insulation layer connects to the upper lining opening 23 of the upper metal inner lining on the outside of the upper frying basket assembly inside the machine body. At the same time, the lower lining opening of the upper metal inner lining connects to the top outer diameter of the plastic partition to form the upper metal inner lining cavity. Simultaneously, the cover opening of the lower metal heat insulation layer connects to the upper lining opening 26 of the lower metal inner lining on the outside of the lower frying basket assembly inside the machine body. The lower lining opening of the hardware lining is connected to the top outer diameter of the plastic base plate 28 on the base to form the lower hardware lining cavity. The bottom opening of the base exposes the plastic base plate. The top of the lower plastic air guide and the upper plastic air guide are respectively provided with exposed waist-shaped openings. The upper lining opening of the lower hardware lining is connected to the bottom outer diameter of the plastic partition. The upper and lower openings at the edge of the frying basket lining of the upper and lower frying basket assembly are respectively connected to the channel openings at the upper and lower openings on one side of the machine body, as well as the corresponding openings of the plastic partition and the base.

[0021] The plastic partition has a downward-protruding hood at its bottom with longitudinally equidistant rectangular openings 2401. A lower air guide opening 2402 is located on one side or rear of the downward-protruding hood at the bottom of the plastic partition. The air outlets of the upper and lower plastic air guides are connected to exhaust vents on one side or rear of the unit, respectively. The lower plastic air guide is connected to the exhaust vents on one side or rear of the unit through the lower air guide opening of the plastic partition. Equally spaced and protruding screw mounting posts 2403 are located on the upper and lower outer diameters of the downward-protruding hood at the bottom of the plastic partition. These screw mounting posts protrude from both ends of the rectangular openings, and the plastic partition is integrated with the upper and lower metal linings via these screw mounting posts. An upper metal heat insulation lining, integrated with the bottom of the upper metal heat insulation layer, is located in a groove on the top plane of the plastic partition. A lower metal heat insulation lining, integrated with the bottom of the lower metal heat insulation layer, is located on the top of the plastic base plate. Two symmetrical guide ribs on the top of the plastic partition extend through the upper metal heat-insulating liner. Symmetrical guide grooves on both sides of the bottom of the upper pot body fit into the guide ribs of the plastic partition. The top of the lower metal heat-insulating liner has a corresponding raised rib to the bottom groove of the lower pot body. The front panel of the plastic partition is flush with the openings at the top and bottom of the machine body.

[0022] The above-mentioned upper frying basket assembly has a PCB control component 4 above the opening on one side of the machine body. The power board assembly 20 is located in the machine body at the rear corner of the other side symmetrical to the PCB control component. The power board assembly, upper heating element, lower heating element, lower motor, and upper motor are connected to the PCB control component in the machine body through wiring.

[0023] The working principle of this cooling system is as follows: Cold air enters through the bottom opening on the base. A portion of the cold air is guided upwards through the upper and lower openings along the inner edges of the linings of the upper and lower blast basket assemblies. It flows from front to back between the upper metal lining and the PCB assembly, finally returning to the top waist-shaped opening of the upper plastic air guide shroud. Then, it passes through the cold air channel formed by the upper plastic centrifugal fan and the upper plastic air guide shroud, and is blown out of the unit through the upper air outlet on one side of the upper plastic air guide shroud. The remaining cold air enters through the lower metal lining, with a portion passing over the surface of the plastic partition and then... The upper portion of the cold air passes through the surface of the upper metal liner, over the upper metal heat insulation layer, and returns to the top waist-shaped opening of the upper plastic air guide shroud. It then passes through the cold air channel formed by the upper plastic centrifugal fan blade and the upper plastic air guide shroud, and is blown into the upper air outlet on one side of the upper plastic air guide shroud, and discharged from the machine body. Another portion of the cold air passes through the lower metal liner, through the rectangular opening of the plastic partition, through the lower metal heat insulation layer, and returns to the top waist-shaped opening of the lower plastic air guide shroud. It then passes through the cold air channel formed by the lower plastic centrifugal fan blade and the lower plastic air guide shroud, and is blown into the lower air outlet on one side of the lower plastic air guide shroud, and discharged from the machine body.

[0024] In use, the lower basket of the double-basket air fryer is removed using the lower handle of the lower basket assembly. After food is placed on the lower rack inside the lower basket, the lower basket assembly is reinserted into the machine using the lower handle. Alternatively, the upper basket of the upper basket assembly is removed using the upper handle of the upper basket assembly. After food is placed on the upper rack inside the upper basket, the upper basket assembly is reinserted into the machine using the upper handle. Finally, pressing the corresponding cooking button on the control panel of the PCB control component will automatically process and cook the food in either the lower or upper basket.

Claims

1. A novel top-and-bottom blower type double-pot air fryer cold air system, the air fryer comprising a body (1), an upper frying basket assembly (2) and a lower frying basket assembly (3), wherein the upper frying basket assembly and the lower frying basket assembly are respectively provided at the upper and lower openings on one side of the body, and the upper and lower metal lining cavities are formed by the interconnected cold air system chamber channels in the body through the middle plastic partition (24); characterized in that The upper heating tube (6) and the upper metal centrifugal fan (18) are arranged sequentially in the groove of the upper metal heat insulation layer (5) above the upper pot body (8) of the upper frying basket assembly (2). The upper plastic centrifugal fan (19) is arranged in the upper plastic air guide hood (22) at the top of the upper metal heat insulation layer inside the machine body (1). The motor shaft at the upper motor (21) at the top of the upper plastic centrifugal fan is connected to the upper plastic centrifugal fan and the upper metal centrifugal fan. The lower heating tube (11) and the lower metal centrifugal fan (15) are arranged sequentially in the groove of the lower metal heat insulation layer (10) above the lower pot body (13) of the lower frying basket assembly (3). The lower plastic centrifugal fan (16) is arranged in the lower plastic air guide hood (25) at the top of the lower metal heat insulation layer inside the machine body. The motor shaft at the lower motor (17) at the top of the lower plastic centrifugal fan is connected to the lower plastic centrifugal fan and the lower metal centrifugal fan. The bottom opening of the outer shell of the machine body is provided with a base (27). The protrusion in the middle of the base The outer plane is provided with bottom openings (2701) arranged equidistantly around the boss. The cover opening of the upper metal heat insulation layer is connected to the upper lining opening at the upper metal inner lining (23) on the outside of the upper frying basket assembly inside the machine. At the same time, the lower lining opening at the upper metal inner lining is connected to the top outer diameter of the plastic partition (24) to form the upper metal inner lining cavity. The cover opening of the lower metal heat insulation layer is connected to the upper lining opening at the lower metal inner lining (26) on the outside of the lower frying basket assembly inside the machine. At the same time, the lower lining opening at the lower metal inner lining... The bottom outer diameter of the plastic base plate (28) on the base is connected to form the lower hardware inner lining cavity. The bottom opening of the base exposes the plastic base plate. The top of the lower plastic air guide and the upper plastic air guide are respectively provided with exposed waist-shaped openings. The upper lining opening of the lower hardware inner lining is connected to the bottom outer diameter of the plastic partition. The upper and lower openings at the edge of the inner lining of the upper and lower frying basket assembly are respectively connected to the channel openings at the upper and lower openings on one side of the machine body, as well as the corresponding openings of the plastic partition and the base.

2. The cold air system of the new top and bottom down-blast wind type double-pot air fryer according to claim 1, characterized in that The bottom of the plastic partition (24) protrudes downwards and the circumference of the cover opening is provided with rectangular openings (2401) arranged longitudinally at equal intervals.

3. The cold air system of the new top and bottom down-blast wind type double-pot air fryer according to claim 2, characterized in that The bottom of the plastic partition (24) has a downward protrusion at one side or rear of the circumference of the cover, and the air outlets of the upper plastic air guide (22) and the lower plastic air guide (25) are respectively connected to the exhaust hole on one side or rear of the machine body. The lower plastic air guide is connected to the exhaust hole on one side or rear of the machine body through the lower air guide opening of the plastic partition.

4. The cold air system of the new top and bottom down-blast wind type double-pot air fryer according to claim 3, characterized in that The bottom of the plastic partition (24) has downward protrusions. The upper and lower outer diameters of the cover are provided with equally spaced and protruding screw mounting posts (2403). The screw mounting posts are protruding at both ends of the rectangular opening (2401). The plastic partition is connected to the upper hardware liner (23) and the lower hardware liner (26) as a whole through the screw mounting posts.

5. The cold air system of the new top and bottom down-blast wind type double-pot air fryer according to claim 4, characterized in that The top flat groove of the plastic partition (24) is provided with an upper metal heat insulation liner that is integrated with the bottom of the upper metal heat insulation layer (5), and the top of the plastic base plate (28) is provided with a lower metal heat insulation liner that is integrated with the bottom of the lower metal heat insulation layer (10).

6. The cold air system of the new top and bottom down-blast wind type double-pot air fryer according to claim 5, characterized in that The two guide ribs symmetrically arranged on the top of the plastic partition (24) extend out through the upper metal heat insulation liner. The guide grooves symmetrically arranged on both sides of the bottom of the upper pot body (8) fit into the guide ribs of the plastic partition. The top of the lower metal heat insulation liner is provided with a convex rib corresponding to the bottom rib groove of the lower pot body (13).

7. The cold air system of the new top and bottom down-blast wind type double-pot air fryer according to claim 1, characterized in that The front panel of the plastic partition (24) is flush with the openings at the top and bottom of the body (1), or the front edge of the plastic partition is located at the top and bottom openings of the body.

8. The cold air system of the new top and bottom down-blast wind type double-pot air fryer according to claim 1, characterized in that The upper frying basket assembly (2) has a PCB control assembly (4) above the opening on one side of the body (1). The power board assembly (20) is located at the rear corner of the other side of the PCB control assembly. The power board assembly, the upper heating tube (6), the lower heating tube (11), the lower motor (17), and the upper motor (21) are connected to the PCB control assembly inside the body through lines.

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