High-performance air fryer

Abstract

The invention relates to a high-performance air fryer, and aims to solve the technical problems that fluid loss at a hot air system is large, heating and distribution are uneven, and food is burnt while being cooked due to the fact that the hot air system of an existing similar product has large turbulent flow. The air fryer is characterized in that the front portion of one end of a metal heat insulation top cover of the air fryer is bent downwards, a back opening of the other end of the metal heat insulation top cover is integrally connected with the top of a cover opening of a hot air cover, and the cover opening below the hot air cover is integrally connected with the back of a metal heat insulation lining of the metal heat insulation cover. Plate through holes which are distributed at equal intervals are formed in the back of the metal heat insulation lining at the joint; pot through holes which are distributed at equal intervals are formed in one side of the pot body at the fryer assembly in front of the plate through holes of the metal heat insulation lining; the radial heat dissipation fan blades in the heat dissipation channel cover and the radial stirring fan blades in the hot air cover are parallel to each other and are perpendicular to the plane of the cover opening, meanwhile, the radial heat dissipation fan blades and the radial stirring fan blades deviate from the center by 12 mm, and the corresponding metal heat insulation lining plate through holes deviate by 12 mm.

Description

Technical Field

[0001] The invention relates to an air fryer, in particular to a high-performance air fryer. Background Art

[0002] An air fryer is a new household appliance that uses high-speed air circulation technology to fry food. It produces food with 80% less fat than traditional electric fryers, is easy to clean, and is both safe and economical, making it highly popular. Existing air fryers generally use a top-blowing design, while others use a back-blowing design, such as the Chinese patent application No. 202410837162.4, published on August 23, 2024, titled "Back-blown Air Fryer." However, due to the centrifugal impeller characteristics of these back-blown air fryers, the fluid is blown in one direction, resulting in uneven energy distribution and, ultimately, uneven heating of the food. Furthermore, this biased flow causes uneven heating of the food, resulting in one side being raw while the other is burnt. Furthermore, these back-blown air fryers suffer from significant energy loss in the hot air system. This high turbulence in the hot air system leads to significant fluid loss, which contributes to the uneven heating of the food. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the present invention aims to provide a high-performance air fryer in the art that addresses the technical issues of existing similar products, such as high turbulence in the hot air system, which leads to significant fluid loss, uneven heating and distribution, and food that is partially raw while partially burnt. This objective is achieved through the following technical solutions.

[0004] A high-performance air fryer, the air fryer body is provided with a metal heat insulation cover, the inner diameter of the opening on one side of the body is covered by the metal heat insulation cover to form a hardware heat insulation layer, the back of the metal heat insulation cover is sequentially provided with radial stirring fan blades and radial heat dissipation fan blades in the corresponding cover shell; the key points of its structural design are that the metal heat insulation cover includes a metal heat insulation top cover and a metal heat insulation lining, the front part of one end of the metal heat insulation top cover on the top of the metal heat insulation cover is bent downward, the back opening of the other end of the metal heat insulation top cover is connected to the top of the cover opening of the hot air cover as a whole, the cover opening below the hot air cover at the connection is connected to the back of the metal heat insulation lining of the metal heat insulation cover, the back of the metal heat insulation lining at the connection is provided with equidistantly distributed plate through holes, the cover opening of the metal heat insulation top cover The top opening of the metal thermal insulation lining at the bottom is provided with a guide plate that protrudes forward and is stamped. The frying pot assembly in front of the plate through-hole of the metal thermal insulation lining is provided with equidistantly distributed pot through-holes on one side of the pot body; the hot air hood on the back of the metal thermal insulation lining is provided with a heating pipe and a radial stirring fan blade, the heat dissipation channel cover on the back of the hot air hood is provided with a radial heat dissipation fan blade, the motor shaft at the motor on the back of the heat dissipation channel cover is simultaneously connected to the radial heat dissipation fan blades in the heat dissipation channel cover and the radial stirring fan blades in the hot air hood, the heating pipe and the motor are connected to the control circuit board through lines; the motor is a clockwise rotating motor, the hot air outlet of the heat dissipation channel cover is provided with an exhaust hole, and the center hole of the heat dissipation channel cover where the motor is installed is the cold air inlet.

[0005] The metal heat-insulating top cover has a raised brim at the downwardly curved front portion. The brim, located at the opening of the air fryer, is provided with an upper through-hole. The upper through-hole aligns with and communicates with the upper through-hole of the fryer in the fryer assembly's housing. The lower through-hole of the fryer in the fryer assembly's housing aligns with and communicates with the lower through-hole at the bottom of the air fryer's opening. The lower through-hole and upper through-hole are respectively provided at the upper and lower edges of the housing where the fryer assembly is inserted into the air fryer's opening. This structure facilitates the circulation of cold air within the air fryer and improves heat dissipation.

[0006] One end of the back of the guide plate of the metal insulation lining below the metal insulation top cover is provided with a downward curved inclined surface, and the other end of the guide plate extends forward and arches upward to be located in the fluid parallel section in the upper metal insulation top cover. The downward curved side ears on both sides of the front end of the guide plate are symmetrically provided with fixing holes, and the guide plate of the metal insulation lining is fixed to the inner walls on both sides of the upper metal insulation top cover through the fixing holes.

[0007] The radial heat dissipation blades within the heat dissipation duct cover and the radial stirring blades within the hot air cover are parallel and perpendicular to the plane of the cover opening. The radial heat dissipation blades and radial stirring blades are offset by 12mm from the center, and the corresponding through-holes in the metal insulation lining are offset by 12mm. This eccentric blade design improves hot air circulation and temperature uniformity, but is not limited to 12mm. Depending on the needs and the volume specifications of the existing air fryer, it can also be adjusted within a range of 10-15mm.

[0008] The heat dissipation channel cover is a one-way collecting cover with a hot air outlet with a worm-shaped protrusion on one side.

[0009] An impeller groove protruding from the back is provided in the middle of the hot air hood, and a heating pipe is provided in a rectangular square groove formed by punching above the impeller groove. The top of the square groove of the hot air hood is punched downward to communicate with the top of the impeller groove below. The top of the hot air hood at the communication point is aligned with the groove on one side of the back of the metal insulation top cover, and an external mounting hole for the heating pipe is provided at the end corner of the square groove on one side of the impeller groove of the hot air hood.

[0010] An inserted NTC temperature sensor is provided on the top of the hot air cover, and the NTC temperature sensor is connected to the control circuit board through a line.

[0011] The heating pipe is arranged on the outer diameter of the radial stirring fan blade in the hot air cover or the front part of the radial stirring fan blade, and the heating pipe is in a circular ring or a square ring.

[0012] An inner pot is provided in the pot body of the fryer assembly, and an inner through hole on a back side of the inner pot is aligned with the pot through hole of the pot body.

[0013] The radial heat dissipation fan blades are plastic cross-flow fan blades, and the radial stirring fan blades are multi-blade radial centrifugal impellers.

[0014] The metal heat shield has a metal insulation lining with a metal insulation bottom plate at its base. The metal insulation bottom plate, metal insulation lining, and metal insulation top cover are integrated to form a metal heat shield with an opening on one side of the fryer assembly. The above is an example of how the metal insulation lining and the metal insulation bottom plate are connected; they can also be integrally formed.

[0015] The invention has a reasonable structural design, is easy to produce and assemble, has a wide range of applications, and has a smooth flow in the hot air system with little loss, uniform heating and distribution, especially for good cooking effect of French fries; it is suitable for use as a high-performance air fryer and a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of a fryer assembly in an embodiment of the present invention when it is placed.

[0017] Figure 2 yes Figure 1 Schematic diagram of the internal structure with the fryer assembly removed. The heat dissipation channel cover and hot air cover are omitted on the back of the figure.

[0018] Figure 3 yes Figure 2 Schematic diagram of the right view internal structure.

[0019] Figure 4 yes Figure 3Schematic diagram of the structure of the radial heat dissipation blades, with the body and metal heat shield omitted in the figure.

[0020] Figure 5 yes Figure 1 Schematic diagram of the cross-sectional structure.

[0021] Figure 6 yes Figure 1 Schematic diagram of the explosion structure, omitting the fryer assembly.

[0022] Figure 7 yes Figure 6 Schematic diagram of the rear structure of the heat dissipation channel cover.

[0023] Figure 8 yes Figure 6 Schematic diagram of the rear structure of the hot air hood.

[0024] Figure 9 It is a fluid cloud diagram of the food cooking position of the present invention.

[0025] Figure 10 It is a fluid cloud diagram of the food cooking position of the existing back air fryer.

[0026] Figure 11 It is a fluid flow cloud diagram of the top shell of the existing back air fryer.

[0027] Figure 12 It is a cloud diagram of the fluid interface in the hot air system of the existing back-mounted air fryer.

[0028] Serial numbers and names of the accompanying drawings: 1. Machine body, 2. Fryer assembly, 201. Fryer body, 3. Metal insulation lining, 301. Guide plate, 4. Heat dissipation channel cover, 5. Hot air cover, 6. Metal insulation top cover, 7. Motor, 8. Radial stirring fan blade, 9. Radial heat dissipation fan blade, 10. Heating tube, 11. NTC temperature sensor, 12. Metal insulation bottom plate. DETAILED DESCRIPTION

[0029] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figures 1-12As shown, a metal heat-insulating cover is provided in the body 1 of the air fryer, and the inner diameter of the opening on one side of the body is covered with the metal heat-insulating cover to form a metal heat-insulating layer, and radial stirring fan blades 8 and radial heat-dissipating fan blades 9 are sequentially provided in the corresponding cover shell on the back of the metal heat-insulating cover; the metal heat-insulating cover includes a metal heat-insulating top cover 6, a metal heat-insulating lining 3 and a metal heat-insulating bottom plate 12, and the front part of one end of the metal heat-insulating top cover on the top of the metal heat-insulating cover is bent downward, and the back opening of the other end of the metal heat-insulating top cover is connected to the top of the cover opening of the hot air cover 5 as a whole, and the cover opening below the hot air cover at the connection is connected to the back of the metal heat-insulating lining of the metal heat-insulating cover as a whole, and the back of the metal heat-insulating lining at the connection is provided with plate through holes distributed at equal distances, and the metal heat-insulating bottom plate 12 is provided at the bottom of the cover opening of the metal heat-insulating top cover. The top opening of the liner is provided with a protruding, stamped guide plate 301 extending forward. The fryer assembly 2 is provided with equally spaced through-holes on one side of the pot body 201, located in front of the plate through-holes of the metal insulation liner. A heating pipe 10 and radial stirring blades 8 are located within the hot air hood on the back of the metal insulation liner. A radial heat dissipation blade 9 is located within the heat dissipation channel hood 4 on the back of the hot air hood. The motor shaft at the motor 7 on the back of the heat dissipation channel hood is connected to both the radial heat dissipation blades and the radial stirring blades within the heat dissipation channel hood. The heating pipe and motor are connected to the control circuit board via wiring. The motor rotates clockwise. The hot air outlet of the heat dissipation channel hood is provided with an exhaust vent. The central hole in the heat dissipation channel hood, where the motor is mounted, serves as the cold air inlet. The radial heat dissipation blades are plastic crossflow blades, and the radial stirring blades are multi-blade radial centrifugal impellers.

[0030] The metal insulated top cover has a raised brim at its downwardly curved front portion. A top cover through-hole is provided at the brim at the opening of the machine body. The top cover through-hole aligns with and communicates with the upper fryer through-hole in the fryer housing of the fryer assembly. The lower fryer through-hole in the fryer housing of the fryer assembly aligns with and communicates with the lower through-hole at the bottom of the machine body opening. The lower and upper fryer through-holes are respectively located at the upper and lower edges of the housing where the fryer assembly is inserted into the machine body opening. A deflector plate on the metal insulated liner below the metal insulated top cover has a downwardly curved inclined surface at one end on its back. The other end of the deflector plate extends forward and arches upward, positioned parallel to the fluid flow within the upper metal insulated top cover. symmetrical fixing holes are provided on the downwardly curved side ears on either side of the front end of the deflector plate. The deflector plate of the metal insulated liner is secured to the inner walls of the upper metal insulated top cover via these fixing holes. The metal insulation lining of the metal insulation cover is provided with a metal insulation bottom plate, and the metal insulation bottom plate, the metal insulation lining and the metal insulation top cover are connected as a whole to form a metal insulation cover with an opening on one side of the fryer assembly.

[0031] The radial heat dissipation blades and radial stirring blades within the heat dissipation duct cover are arranged parallel to and perpendicular to the plane of the duct opening. The radial heat dissipation blades and radial stirring blades are offset by 12 mm from the center, and the corresponding through-holes in the metal insulation lining are offset by 12 mm. The heat dissipation duct cover is a one-way collecting duct with a worm-shaped protrusion on one side of the hot air outlet. A stamped impeller groove protruding toward the back is provided in the center of the hot air cover. A heating pipe is provided in a rectangular square groove stamped above the impeller groove. The top of the square groove of the hot air cover is stamped downward to connect with the top of the impeller groove below. The top of the hot air cover at the connection is aligned with the groove on the back side of the metal insulation top cover. The end corner of the square groove on one side of the impeller groove of the hot air cover is provided with an external mounting hole for the heating pipe. An NTC temperature sensor 11 is inserted into the top of the hot air cover, and the NTC temperature sensor is connected to the control circuit board via a circuit. The heating pipe is provided at the outer diameter of the radial stirring blades in the hot air cover or in front of the radial stirring blades. The heating pipe is in the form of a circular ring or a square ring.

[0032] During use, food is placed in the fryer assembly, which is then placed inside the fryer. The on-screen button above the fryer assembly opening is activated. Hot air from the fryer assembly exits through the metal insulation cover, accelerating through the guide plate and the downwardly curved front edge of the metal insulation cover before entering the fryer assembly. The hot air is then collected from the handle side of the fryer assembly toward the back, where it circulates, dissipating heat and exiting the fryer assembly through the exhaust holes in the one-way collector. Based on the aforementioned structural features, an inner pot can also be provided within the fryer assembly, with the inner through-holes on the back of the inner pot aligned with the pot through-holes in the fryer assembly.

[0033] In summary, the motor provides rotational power to the impeller, which can only rotate clockwise; the radial stirring blades transfer energy to the food mainly through forced convection; the radial heat dissipation blades discharge the energy that cannot be absorbed by the food out of the air fryer, preventing the temperature of the entire machine from rising too high; the temperature of the center point of the cavity is mapped by the temperature of the NTC temperature sensor, thereby controlling the temperature of the center point of the cavity. At the same time, the radial stirring blades of the hot air system are set 12mm off-center, and the corresponding through-holes in the metal insulation lining plate as the air inlet are also offset 12mm to the left, increasing the fluid strength on the left side of the product; the heating tube adopts a ring design to enhance the suction of the product and the suction of the front fluid to compensate for the problem of insufficient strength of the blown fluid; the front curved design of the metal insulation top cover is combined with the flow collecting structure of the guide plate at the metal insulation lining to prevent large-diameter turbulence and reduce fluid loss.

Claims

1. A high-performance air fryer, wherein a metal heat insulation cover is provided inside a body (1) of the air fryer, the inner diameter of an opening on one side of the body is covered by the metal heat insulation cover to form a metal heat insulation layer, and radial stirring blades (8) and radial heat dissipation blades (9) are provided in sequence in a corresponding cover shell on the back of the metal heat insulation cover; characterized in that The metal heat insulation cover comprises a metal heat insulation top cover (6) and a metal heat insulation lining (3), wherein the front portion of one end of the metal heat insulation top cover at the top of the metal heat insulation cover is bent downward, and the back opening of the other end of the metal heat insulation top cover is connected to the top of the cover opening of the hot air cover (5) as a whole, and the cover opening below the hot air cover at the connection is connected to the back of the metal heat insulation lining of the metal heat insulation cover as a whole, and the back of the metal heat insulation lining at the connection is provided with plate through holes distributed at equal intervals, and the top opening of the metal heat insulation lining below the cover opening of the metal heat insulation top cover is provided with a guide plate (301) extending forward and protruding and formed by stamping, and the frying pan assembly (2) in front of the plate through hole of the metal heat insulation lining is provided with a guide plate (301) extending forward and protruding and stamped ... One side of the pot body (201) is provided with pot through holes which are distributed at equal intervals; a heating pipe (10) and a radial stirring fan blade (8) are provided in the hot air cover on the back of the metal heat insulation lining; a radial heat dissipation fan blade (9) is provided in the heat dissipation channel cover (4) on the back of the hot air cover; a motor shaft at a motor (7) on the back of the heat dissipation channel cover is simultaneously connected to the radial heat dissipation fan blades in the heat dissipation channel cover and the radial stirring fan blades in the hot air cover; the heating pipe and the motor are connected to a control circuit board via a circuit; the motor is a clockwise rotating motor; an exhaust hole is provided on the body at the hot air outlet of the heat dissipation channel cover; and a central hole in the middle of the heat dissipation channel cover where the motor is installed is a cold air inlet.

2. The high performance air fryer according to claim 1, characterized in that The metal heat-insulating top cover (6) is provided with a raised brim at the downwardly bent front portion, and a top cover upper through hole is provided at the brim at the opening of the machine body, the top cover upper through hole is aligned and communicated with the fryer upper through hole at the cover shell of the fryer assembly (2), the fryer lower through hole at the cover shell of the fryer assembly is aligned and communicated with the 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 at the upper and lower edges of the cover shell at the opening where the fryer assembly is placed in the opening of the machine body.

3. The high performance air fryer according to claim 1, characterized in that A downwardly curved inclined surface is provided at one end of the back of the guide plate (301) of the metal thermal insulation lining (3) below the metal thermal insulation top cover (6), and the other end of the guide plate extends forward and arches upward to be located at a fluid parallel section in the upper metal thermal insulation top cover (6). The downwardly curved side ears on both sides of the front end of the guide plate are symmetrically provided with fixing holes, and the guide plate of the metal thermal insulation lining is fixed to the inner walls on both sides of the upper metal thermal insulation top cover through the fixing holes.

4. The high performance air fryer according to claim 1, characterized in that The radial heat dissipation blades (9) inside the heat dissipation channel cover (4) and the radial stirring blades (8) inside the hot air cover (5) are arranged parallel to and perpendicular to the plane at the cover opening. At the same time, the radial heat dissipation blades and the radial stirring blades are offset from the center by 12 mm, and the corresponding plate through holes at the metal thermal insulation lining (3) are offset by 12 mm.

5. The high performance air fryer according to claim 1, characterized in that The heat dissipation channel cover (4) is a one-way collecting cover with a hot air outlet having a worm-shaped protrusion on one side.

6. The high performance air fryer according to claim 1, characterized in that The hot air hood (5) has an impeller groove in the middle thereof which is stamped and protrudes toward the back, and a heating pipe (10) is arranged in a rectangular square groove which is stamped above the impeller groove. The top of the square groove of the hot air hood is stamped downward to be connected with the top of the impeller groove below, and the top of the hot air hood at the connected position is aligned with the groove on one side of the back of the metal heat insulation top cover (6). A heating pipe external mounting hole is provided at the end corner of the square groove on one side of the impeller groove of the hot air hood.

7. The high performance air fryer according to claim 1, characterized in that An inserted NTC temperature sensor (11) is provided on the top of the hot air hood (5), and the NTC temperature sensor is connected to the control circuit board via a line.

8. The high performance air fryer according to claim 1, characterized in that The heating pipe (10) is arranged on the outer diameter of the radial stirring fan blade (8) inside the hot air cover (5) or on the front part of the radial stirring fan blade, and the heating pipe is in the form of a circular ring or a square ring.

9. The high performance air fryer according to claim 1, characterized in that The radial heat dissipation blades (9) are plastic cross-flow blades, and the radial stirring blades (8) are multi-blade radial centrifugal impellers.

10. The high performance air fryer according to claim 1, characterized in that A metal insulation bottom plate (12) is provided at the bottom of the metal insulation lining (3) of the metal insulation cover, and the metal insulation bottom plate, the metal insulation lining and the metal insulation top cover (6) are connected as a whole to form a metal insulation cover with an opening on one side of the fryer assembly (2).

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