Multi-runner air fryer

Abstract

The utility model relates to a multi-runner air fryer, which aims at solving the technical problems of low energy efficiency and non-uniform energy distribution caused by lack of air guide bending design and flow guide plate arrangement at a hot air outlet position in a machine body of the existing similar product and inclined arrangement of an impeller. The air fryer is characterized in that a back opening at one end of a metal heat insulation top cover of the air fryer is connected with the top of a cover opening of a channel flow collecting cover into a whole, and the cover opening below the channel flow collecting cover at the joint is connected with the back of a metal heat insulation lining of a metal heat insulation cover into a whole; a flow guide plate which extends and protrudes forwards and is formed by stamping is arranged at a top hole opening of the metal heat insulation lining below a cover opening of the metal heat insulation top cover; pot through holes which are distributed at equal intervals are formed in one side of a pot body at the fryer assembly in front of a plate through hole of the metal heat insulation lining; an inner through hole in one side of the back of an inner pot of the fryer assembly is aligned with the pot through hole of the pot body, and a side wall channel gap and a bottom channel gap are formed; the heat dissipation impeller in the bidirectional flow collecting cover and the hot air impeller in the channel flow collecting cover are parallel and are perpendicular to the plane of a cover opening in an inclined mode.

Description

Technical Field

[0001] This utility model relates to an air fryer, specifically a multi-channel air fryer. 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 can reduce the amount of oil in food by 80%, is easy to clean, and is both safe and economical, making it very popular. However, traditional air fryers generally use a top-blowing design, where hot air only acts on the surface of the food, leaving the back without hot air. To ensure even heating, food needs to be flipped during cooking, leading to uneven energy distribution. For example, Chinese patent application number 202410837162.4, published on August 23, 2024, entitled "Air Fryer with Back-Outlet Airflow," illustrates this. Other back-blowing air fryers suffer from lower energy efficiency. This is because the fluid ejected from the centrifugal fan impacts the inner wall of the air fryer, resulting in significant fluid kinetic energy loss and lower efficiency. Additionally, the top of the fryer occupies a large amount of space. The two types of air fryers mentioned above are rather bulky, with the motor and cooling system on top taking up a large volume, making the products look rather bulky. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide a multi-channel air fryer that addresses the technical problems of existing similar products, such as the lack of a guiding bend design and baffle plate at the hot air outlet, and the oblique placement of the impeller, which leads to low energy efficiency, uneven energy distribution, and a large space occupied by the head in the body structure design. This objective is achieved through the following technical solution.

[0004] A multi-channel air fryer, the body of which is provided with a metal heat shield, the inner diameter of the opening of one side of the body is covered by the metal heat shield to form a hardware heat insulation layer, and the back of the metal heat shield is sequentially provided with a hot air mechanism with an impeller and a heat dissipation mechanism; the structural design points of the air fryer are that the metal heat shield comprises a metal heat shield top cover and a metal heat shield lining, one end of the metal heat shield top cover at the top of the metal heat shield is bent downward at the front, the other end of the metal heat shield top cover is open at the back and is integrated with the top of the cover opening of the channel collector cover, the cover opening below the channel collector cover is integrated with the back of the metal heat shield lining of the metal heat shield, the back of the metal heat shield lining at the connection position is provided with equally distributed plate through holes, the top of the metal heat shield lining below the cover opening of the metal heat shield top cover is provided with a guide plate extending forward and formed by stamping, and the side of the fryer assembly at the front of the plate through holes of the metal heat shield lining is provided with equally distributed pot through holes; the channel collector cover in the back of the metal heat shield lining is provided with a heating pipe and a hot air impeller, the bidirectional collector cover in the back of the channel collector cover is provided with a heat dissipation impeller, the motor shaft at the motor in the back of the bidirectional collector cover is connected with the heat dissipation impeller in the bidirectional collector cover and the hot air impeller in the channel collector cover, and the heating pipe and the motor are connected with a control circuit board through a circuit.

[0005] The inner pot is arranged in the pot body of the fryer assembly, the inner through hole at the back of the inner pot is aligned with the pot through hole of the pot body, and the end of the downward bent front part of the metal heat shield top cover and the end of the guide plate of the metal heat shield lining below the metal heat shield top cover are located above the inner wall of the pot opening at the handle side of the inner pot of the fryer assembly. The main flow channel of the air fryer is composed of the metal heat shield top cover and the guide plate, and the main flow channel mainly controls the flow direction of the fluid so that the fluid flows along a predetermined track. Meanwhile, the main flow channel narrows at the downward bent front part of the metal heat shield top cover to accelerate the fluid, thereby reducing the turbulent diameter and making the food heated more uniformly. The fluid is divided into upper and lower sub-flows by the fluid channel separated by the inner pot in the pot body, so as to provide energy for the front and back of the food; the main flow channel provides power for the sub-flows, the upper sub-flow heats the upper surface of the food, and the lower sub-flow heats the lower surface of the food.

[0006] The guide plate of the metal heat shield lining is provided with downward bent inclined surfaces at both ends, the middle of the guide plate is arched to be located in the upper metal heat shield top cover, the guide plate is provided with fixing holes at both ends symmetrically at the downward bent edges of the middle of the guide plate, and the guide plate of the metal heat shield lining is fixed to the inner walls at both sides in the upper metal heat shield top cover through the fixing holes.

[0007] The inner pot of the fryer assembly is provided with a side wall passage gap between the pot body on one side of the handle, and a bottom passage gap between the bottom of the inner pot and the inner bottom of the pot body.

[0008] The inner heat dissipation impeller of the bidirectional flow collector cover and the inner hot air impeller of the passage flow collector cover are parallel and vertically inclined at an angle of 1-15 degrees with respect to the plane at the cover opening. The optimal inclination angle of the above-mentioned impeller is 6 degrees. The inclination of the above-mentioned impeller is mainly to improve the fluid efficiency and avoid excessive fluid impact on the top surface of the air fryer during transmission, resulting in a large fluid loss.

[0009] The bidirectional flow collector cover is replaced by a unidirectional flow collector cover. The hot air outlet with a worm gear-shaped protrusion on one side of the unidirectional flow collector cover is aligned and communicated with the exhaust hole of the machine body. The central hole of the unidirectional flow collector cover in which the motor is installed serves as the cold air inlet.

[0010] The passage flow collector cover is provided with an impeller groove protruding and formed by stamping towards the back. A heating pipe is arranged in the rectangular square groove formed by stamping above the impeller groove. The top of the square groove of the passage flow collector cover is integrally communicated with the top of the impeller groove below by stamping downwards. The top of the passage flow collector cover on both sides of the communication is provided with a cover through hole. The end corner of the square groove on one side of the impeller groove of the passage flow collector cover is provided with a heating pipe external mounting hole. The passage flow collector cover with the above-mentioned structure plays a role in flow collection and reduces turbulence, which is crucial to the performance of the product. The two cover through holes of the passage flow collector cover serve as air outlets, ensuring smooth exhaust of the impeller whether it is rotating forward or backward.

[0011] The top of the passage flow collector cover is provided with an inserted NTC temperature sensor. The NTC temperature sensor is connected to the control circuit board through a wire.

[0012] The heating pipe is arranged outside the diameter of the inner hot air impeller or in front of the hot air impeller. The heating pipe is in the shape of a circular ring or a square ring.

[0013] The heat dissipation impeller is a plastic cross-flow fan blade, and the hot air impeller is a multi-leaf radial centrifugal impeller. The heat dissipation and hot air effects of the above-mentioned impeller are better.

[0014] The bottom of the metal heat insulation lining of the metal heat insulation cover is provided with a metal heat insulation bottom plate. The metal heat insulation bottom plate, the metal heat insulation lining, and the metal heat insulation top cover are integrally connected to form a metal heat insulation cover with an opening on one side of the fryer assembly. The above is an embodiment of the connection method of the metal heat insulation lining and the metal heat insulation bottom plate, which can also be integrally formed.

[0015] The front of the metal heat insulation top cover is provided with a convex brim, the brim is provided with a top cover through hole at the opening of the machine body, the top cover through hole is aligned and communicated with a fryer upper through hole at the cover of the fryer assembly, a fryer lower through hole at the cover of the fryer assembly is aligned and communicated with a lower machine body through hole at the bottom of the opening of the machine body, and the fryer lower through hole and the fryer upper through hole are respectively arranged on the upper and lower edges of the cover at the opening of the machine body into which the fryer assembly is placed.

[0016] The utility model discloses reasonable structure design, production and assembly are convenient, and energy efficiency is high, and energy distribution is even, and the head space of machine body is small. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the embodiment explosion structure schematic diagram of the utility model.

[0018] Figure 2 It is Figure 1 The assembly cross section structure schematic diagram of after.

[0019] Figure 3 It is Figure 2 The three-dimensional structure internal structure schematic diagram of.

[0020] Figure 4 It is Figure 1 The heat dissipation mechanism structure schematic diagram of.

[0021] Figure 5 It is Figure 4 The two-way current collecting cover three-dimensional structure schematic diagram of.

[0022] Figure 6 It is Figure 1 The channel current collecting cover rear three-dimensional structure schematic diagram of.

[0023] Figure 7 It is the one-way current collecting cover three-dimensional structure schematic diagram of the utility model.

[0024] Drawing serial number and name: 1, main machine body, 2, metal heat insulation top cover, 3, metal heat insulation inner lining, 301, deflector, 4, fryer assembly, 401, pot body, 402, inner pot, 5, channel current collecting cover device, 501, cover through hole, 6, hot air impeller, 7, heating pipe, 8, metal heat insulation bottom plate, 9, bottom shell, 10, two-way current collecting cover device, 11, heat dissipation impeller, 12, motor, 13, NTC temperature sensor, 14, one-way current collecting cover. Implementation

[0025] Now, the structure and use of the utility model will be further described in combination with the drawings. Figures 1-6As shown, the air fryer has a metal heat insulation cover inside. The body includes a main body 1 and a bottom shell 9. The inner diameter of the opening on one side of the body is covered by the metal heat insulation cover to form a metal heat insulation layer. The back of the metal heat insulation cover is provided with a hot air mechanism with an impeller and a heat dissipation mechanism. The metal heat insulation cover includes a metal heat insulation top cover 2, a metal heat insulation liner 3, and a metal heat insulation bottom plate 8. One end of the metal heat insulation top cover is bent downwards, and the back opening of the other end of the metal heat insulation top cover is integrated with the top of the hood of the channel collector 5. At the connection, the hood below the channel collector 5 is integrated with the back of the metal heat insulation liner of the metal heat insulation cover. The back of the metal heat insulation liner at the connection has plate through holes distributed at equal intervals. Below the hood of the metal heat insulation top cover, the top opening of the metal heat insulation liner has a guide plate 301 that extends forward and is formed by stamping. The front of the plate through holes of the metal heat insulation liner... The fryer assembly has four pot body 401 with equidistantly distributed pot through holes on one side; the channel collector hood on the back of the metal heat-insulating liner is equipped with a heating tube 7 and a hot air impeller 6, and the bidirectional collector hood 10 on the back of the channel collector hood is equipped with a heat dissipation impeller 11. The motor shaft at the motor 12 on the back of the bidirectional collector hood is connected to both the heat dissipation impeller in the bidirectional collector hood and the hot air impeller in the channel collector hood. The heating tube and the motor are connected to the control circuit board via wiring; the motor is a forward and reverse motor, and the body has exhaust holes at the hot air outlet of the bidirectional collector hood. The central hole of the motor installed in the middle of the bidirectional collector hood is a cold air inlet. The bottom shell of the main body is equipped with a metal heat-insulating base plate. The metal heat-insulating base plate, the metal heat-insulating liner, and the metal heat-insulating top cover are integrated to form a metal heat-insulating cover with an opening on one side of the fryer assembly. The front of the metal heat-insulating top cover is curved downwards and has a raised brim. The brim at the opening of the machine body has a top cover through hole. The top cover through hole is aligned and communicates with the fryer top through hole at the cover of the fryer assembly. The fryer bottom through hole at the cover of the fryer assembly is aligned and communicates with the bottom of the machine body through hole at the opening of the machine body. The fryer bottom through hole and the fryer top through hole are respectively located at the upper and lower edges of the cover at the opening where the fryer assembly is placed into the opening of the machine body.

[0026] The aforementioned fryer assembly includes an inner pot 402. The inner pot's back side has an internal through-hole aligned with the pot body's through-hole. The downward-curving end of the front of the metal heat-insulating top cover and the end of the guide plate of the metal heat-insulating liner below the top cover are located above the inner wall of the inner pot's handle side. Simultaneously, the guide plate of the metal heat-insulating liner has downward-curving slopes at both ends, and the middle arch of the guide plate is located inside the upper metal heat-insulating top cover. The downward-curving ears on both sides of the middle of the guide plate have symmetrical fixing holes at both ends. The guide plate of the metal heat-insulating liner is fixed to the inner walls of both sides of the upper metal heat-insulating top cover through these fixing holes. A side wall channel gap is provided between the inner pot and the pot body on the handle side of the fryer assembly, and a bottom channel gap is provided between the bottom of the inner pot and the bottom of the pot body.

[0027] The heat dissipation impeller in the bidirectional collecting cover and the hot air impeller in the channel collecting cover are parallel and are arranged at an angle of 6 degrees with the plane of the cover opening. The channel collecting cover is provided with an impeller groove protruding towards the back portion. A heating pipe is arranged in the rectangular square groove formed by stamping above the impeller groove. The top portion of the channel collecting cover is integrally connected to the top portion of the impeller groove by stamping. The top portion of the channel collecting cover is aligned with the side groove of the metal heat insulation top cover at the connecting portion. The top portion of the channel collecting cover is provided with cover through holes 501 on both sides. The end corner of the square groove of the channel collecting cover is provided with a heating pipe external mounting hole. The top portion of the channel collecting cover is provided with an inserted NTC temperature sensor 13. The NTC temperature sensor is connected to the control circuit board through a wire. The heating pipe is arranged on the outer diameter of the hot air impeller or the front portion of the hot air impeller. The heating pipe is in the shape of a circular ring or a square ring. The heat dissipation impeller is a plastic cross-flow fan blade. The hot air impeller is a multi-blade radial centrifugal impeller.

[0028] According to the above structural features, as shown in the drawings, Figure 7 the bidirectional collecting cover is replaced by a unidirectional collecting cover 14. The hot air outlet of the unidirectional collecting cover is aligned with the exhaust hole of the body. The center hole of the unidirectional collecting cover is provided with a motor and is used as a cold air inlet.

[0029] In use, as shown in the drawings, Figure 2 food is placed in the inner pot of the frying pan assembly. The frying pan assembly is placed in the body. The screen button above the opening of the body is started. The hot air in the body passes through the metal heat insulation top cover, the deflector and the front portion of the metal heat insulation top cover, is bent downwards, is accelerated in the narrowed portion, enters the inner pot and the pot body outside the inner pot, is divided into upper and lower parts, heats the food in the inner pot, and is discharged from the exhaust hole of the bidirectional collecting cover or the unidirectional collecting cover.

[0030] In summary, the air fryer solves the problem of turning over during the cooking process of the air fryer and improves the energy efficiency of the product. The flow channel in the body transports as much high-temperature fluid as possible to the surface of the food. The motor provides rotary power for the impeller and rotates in both directions (a motor that rotates in both directions is used to solve the problem of uneven heating of French fries. Two air outlets are designed to ensure that the heat dissipation performance of the motor does not change when the motor rotates in one direction or the other). The hot air impeller mainly transmits energy to the food through forced convection. The heat dissipation impeller discharges the energy that cannot be absorbed by the food from the air fryer, thereby preventing the temperature of the whole machine from rising too high. The NTC temperature sensor maps the temperature of the center point of the cavity, thereby controlling the temperature of the center point of the cavity. The exhaust holes on both sides or one side of the body discharge steam, oil smoke and other substances generated in the air fryer. The cold air inlet channel allows cold air outside the pot to enter the cold air system, thereby removing the heat that cannot be absorbed by the food from the pot.

Claims

1. A multi-flow air fryer, which is characterized in that a metal heat shield is arranged in the body of the air fryer, the inner diameter of the opening of one side of the body is covered by the metal heat shield to form a hardware heat insulation layer, and a hot air mechanism with an impeller and a heat dissipation mechanism are arranged in sequence on the back of the metal heat shield. The metal heat shield comprises a metal heat shield top cover (2) and a metal heat shield inner liner (3), the metal heat shield top cover is bent downward at the front end of the top of the metal heat shield, the back end of the metal heat shield top cover is connected to the top of the cover opening of the channel collector cover (5) as a whole, the cover opening below the connection of the channel collector cover is connected to the back of the metal heat shield inner liner as a whole, the back of the metal heat shield inner liner at the connection is provided with equidistantly distributed plate through holes, the top of the metal heat shield inner liner below the cover opening of the metal heat shield top cover is provided with a flow guide plate (301) which is formed by stamping and extends to the front part, and the side of the pot body (401) of the frying pan assembly (4) at the front part of the plate through hole of the metal heat shield inner liner is provided with equidistantly distributed pot through holes; the heating pipe (7) and the hot air impeller (6) are arranged in the channel collector cover at the back of the metal heat shield inner liner, the heat dissipation impeller (11) is arranged in the two-way collector cover (10) at the back of the channel collector cover, the motor shaft of the motor (12) at the back of the two-way collector cover is connected to the heat dissipation impeller in the two-way collector cover and the hot air impeller in the channel collector cover at the same time, and the heating pipe and the motor are connected to the control circuit board through a circuit; the motor is a forward and reverse motor, the body of the two-way collector cover at the hot air outlet is respectively provided with an exhaust hole, and the center hole of the two-way collector cover in which the motor is arranged is a cold air inlet.

2. A multi- flow air fryer according to claim 1, characterized in that The inner pot (402) is arranged in the pot body (401) of the frying pan assembly (4), the inner through hole at the back side of the inner pot is aligned with the pot through hole of the pot body, and the end of the downward bent front part of the metal heat shield top cover (2) and the end of the flow guide plate (301) of the metal heat shield inner liner (3) below the metal heat shield top cover are located above the inner wall of the pot opening at the handle side of the inner pot.

3. A multi-pass air fryer according to claim 2, wherein The flow guide plate (301) of the metal heat shield inner liner (3) is provided with downward bent inclined surfaces at both ends, the middle of the flow guide plate is arched to be located in the metal heat shield top cover (2) above, and the fixed holes are symmetrically arranged at both ends of the edge ears which are formed by downward bending at both sides of the middle of the flow guide plate, and the flow guide plate of the metal heat shield inner liner is fixed to the inner walls at both sides in the metal heat shield top cover through the fixed holes.

4. The multi-stream air fryer of claim 2, wherein The side wall passage gap is arranged between the inner pot (402) of the frying pan assembly (4) and the pot body at the handle side, and the bottom passage gap is arranged between the bottom of the inner pot and the inner bottom of the pot body.

5. The multi-stream air fryer of claim 1, wherein The heat dissipation impeller (11) in the two-way collector cover (10) and the hot air impeller (6) in the channel collector cover (5) are parallel and are obliquely arranged at an angle of 1-15 degrees with the plane of the cover opening.

6. The multi-stream air fryer of claim 1, wherein The two-way collector cover (10) is replaced by a one-way collector cover (14), the hot air outlet which is a worm gear shaped protrusion at one side of the one-way collector cover is aligned with and communicated with the exhaust hole of the body, and the center hole of the one-way collector cover in which the motor (12) is arranged is a cold air inlet.

7. The multi-stream air fryer of claim 1, wherein The channel manifold (5) is provided with an impeller groove protruding and formed by stamping in the back, a rectangular square groove is formed above the impeller groove, the heating pipe (7) is arranged in the square groove, the top of the square groove of the channel manifold is integrally communicated with the top of the impeller groove by stamping downward, the top of the channel manifold is aligned with the groove of the back of the metal heat insulation top cover (2) at the communicated position, meanwhile, the top of the channel manifold is provided with cover through holes (501) on both sides at the communicated position, and the end corner of the square groove on one side of the impeller groove of the channel manifold is provided with a heating pipe external mounting hole.

8. The multi-stream air fryer of claim 1, wherein The top of the channel manifold (5) is provided with an inserted NTC temperature sensor (13), and the NTC temperature sensor is connected with a control circuit board through a wire.

9. The multi-stream air fryer of claim 1, wherein The heating pipe (7) is arranged in the channel manifold (5) and is located at the outer diameter of the hot air impeller (6) or the front of the hot air impeller, and the heating pipe is in a circular ring or a square ring.

10. The multi-stream air fryer of claim 1, wherein The heat dissipation impeller (11) is a plastic cross-flow fan blade, and the hot air impeller (6) is a multi-leaf radial centrifugal impeller.

11. The multi-stream air fryer of claim 1, wherein The bottom of the metal heat insulation lining (3) of the metal heat insulation cover is provided with a metal heat insulation bottom plate (8), the metal heat insulation bottom plate, the metal heat insulation lining and the metal heat insulation top cover (2) are integrally connected to form the metal heat insulation cover with an open side of the fryer assembly (4).

12. The multi-stream air fryer of claim 1, wherein The front of the metal heat insulation top cover (2) is provided with a protruding brim at the downward bending position, the brim is provided with a top cover through hole at the opening of the machine body, the top cover through hole is aligned and communicated with the fryer through hole of the cover shell of the fryer assembly (4), the fryer lower through hole of the cover shell of the fryer assembly is aligned and communicated with the machine body lower through hole at the bottom of the opening of the machine body, and the fryer lower through hole and the fryer upper through hole are respectively arranged on the upper and lower edges of the cover shell at the opening of the machine body.

Images