Air duct structure of air fryer

Abstract

The air duct structure of the air fryer comprises a cooking main body and a hot air generating device, the cooking main body is provided with an air suction channel and an exhaust channel, the cooking main body is provided with a heating cavity communicated with the air suction channel and the exhaust channel, and a frying basket is arranged in the heating cavity. A plurality of air inlet holes are formed in the side, close to the hot air generating device, of the frying basket, a plurality of air return holes are formed in the side, adjacent to the air inlet holes, of the frying basket, a backflow gap is reserved between the side of the frying basket and the cooking body, and hot air exhausted out of the frying basket from the air return holes partially flows back to the hot air generating device to be circularly heated after passing through the backflow gap. And the other part of hot air is exhausted from the exhaust channel. The frying basket has the effect of performing hot air circulation heating on food materials in the frying basket frame in the horizontal direction, and the effect of improving the food material heating efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cookers, in particular to an air duct structure of an air fryer. Background Art

[0002] The existing Chinese patent with announcement number CN217959770U discloses an air fryer structure, including a lower cavity, an upper cover and a heating assembly; the lower cavity has a lower chamber for placing food; the upper cover has an upper chamber, and the upper chamber is provided with a vent; the upper cover is arranged above the lower cavity, and the heating assembly is arranged between the lower chamber of the lower cavity and the upper chamber of the upper cover; the heating assembly includes a fan mechanism and a heating mechanism; the fan mechanism includes a motor, a mounting cover, a cooling fan, a heating fan and an isolation cover; the mounting cover is installed at the top of the lower cavity of the lower cavity, the motor is installed on the mounting cover, and the motor output shaft extends below the mounting cover, and the cooling fan The fan and the hot fan are coaxially arranged on the motor output shaft in sequence, and the isolation cover is arranged between the cold fan and the hot fan. The isolation cover divides the heating component into a cold air space connected to the upper chamber and a hot air space connected to the lower chamber; the cold air space has an independent first channel connected to the vent of the upper cover body, and the hot air space has an independent second channel connected to the vent of the upper cover body; the heating mechanism is arranged below the hot fan of the fan mechanism, and is used to heat the air in the hot air space; a steam box for holding water is provided in the lower chamber; it also includes a pot body assembly, the pot body assembly includes a handle part and a pot body part connected to each other, and the lower chamber of the lower cavity is provided with an opening for the pot body assembly to be inserted and placed.

[0003] However, the above-mentioned air fryer has the following disadvantages: like most air fryers on the market, it uses a hot fan on the top to blow the air heated by the heating tube from top to bottom into the pot body, and after completing the circulation in the pot body, it is discharged from the side vents. Other existing air fryers also use a method of blowing hot air from bottom to top, but this circulation method easily burns the surface of the upper and lower sides of the food, while the food is undercooked around the edges. There is currently a lack of air fryers on the market that require higher heat baking on all sides of the food. Utility Model Content

[0004] The utility model aims to provide an air duct structure of an air fryer, which has the effect of circulating hot air to heat the food in the frying basket in the horizontal direction and improving the heating efficiency of the food.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: an air duct structure of an air fryer, comprising a cooking body and a hot air generating device, the cooking body being provided with an air intake channel and an exhaust channel, the cooking body being provided with a heating chamber communicating with the air intake channel and the exhaust channel, a frying basket being provided in the heating chamber, a side of the frying basket being provided with a plurality of air inlet holes close to the hot air generating device, a side of the frying basket being provided with a plurality of return air holes adjacent to the air inlet holes, and a return flow gap being left between the side of the frying basket and the cooking body, a portion of the hot air discharged from the return air holes to the outside of the frying basket being returned to the hot air generating device for circulated heating after passing through the return flow gap, and the other portion of the hot air being discharged from the exhaust channel.

[0006] By adopting the above technical solution, the air flow sucked into the cooking body from the air intake channel is heated by the hot air generating device to form hot air, and the hot air enters the frying basket through the air inlet hole to heat and cook the food, and then the hot air in the frying basket is discharged laterally from the side through the return air hole into the heating chamber, and the hot air in the heating chamber partially flows back to the hot air generating device through the reflux gap for cyclic heating to realize hot air circulation, and the other part of the hot air is directly discharged from the exhaust channel, which has the effect of circulating hot air heating the food in the frying basket in the horizontal direction and improving the heating efficiency of the food.

[0007] The present invention is further configured as follows: the frying basket frame is provided with the return air holes on both sides adjacent to the air inlet holes.

[0008] By adopting the above technical solution, the hot air entering the frying basket from the air inlet hole can be divided into two streams and returned from the two sides of the frying basket perpendicular to the air inlet direction of the air inlet hole, thereby increasing the return air volume of the hot air in the frying basket, so that more hot air can circulate in the frying basket per unit time, thereby improving the cooking efficiency of the present invention.

[0009] The present invention is further configured such that an air inlet gap is left between the top of the frying basket and the cooking body.

[0010] By adopting the above technical solution, the hot air generated by the hot air generating device can be partially blown toward the frying basket from the top of the frying basket through the air inlet gap, thereby increasing the amount of hot air blown toward the frying basket.

[0011] The present invention is further configured as follows: the cooking body is provided with a guide slope on the top of the heating chamber, and the hot air blown from the air inlet gap to the top of the frying basket is guided into the frying basket under the guidance of the guide slope.

[0012] By adopting the above technical solution, the hot air blown from the air inlet gap to the top of the frying basket is guided from top to bottom into the frying basket under the guidance of the guide slope, so as to improve the baking effect on the upper surface of the food in the frying basket.

[0013] The present invention is further configured as follows: a partition is provided in the heating chamber, the partition divides the heating chamber into a guide chamber and a cooking chamber, and the partition is provided with an air inlet hole and an air outlet hole connecting the guide chamber and the cooking chamber.

[0014] By adopting the above technical solution, the addition of the partition allows the internal space of the heating chamber to be functionally partitioned, and at the same time can prevent the frying basket from being over-inserted into the heating chamber and causing interference and jamming of components. The airflow in the guide chamber flows into the cooking chamber through the air inlet holes, and the airflow in the cooking chamber flows back to the guide chamber through the air outlet holes, thereby realizing hot air circulation.

[0015] The present invention is further configured as follows: a plurality of the air inlet holes are concentratedly distributed in the middle of the partition net, and a plurality of the air outlet holes are distributed around the plurality of the air inlet holes.

[0016] By adopting the above technical solution, the air inlet and outlet structure of the frying basket back and the air return side are adapted.

[0017] The utility model is further configured as follows: a heat insulation cover is provided in the guide cavity, the heat insulation cover divides the guide cavity into a cold air cavity and a hot air cavity, the cold air cavity is communicated with the air intake channel and the air exhaust channel respectively, the hot air generating device includes a fan blade assembly, the fan blade assembly includes cold air fan blades and hot air fan blades, the cold air fan blades are rotatably arranged in the cold air cavity, the hot air fan blades are rotatably arranged in the hot air cavity, and the heat insulation cover is provided with an air inlet hole and an air outlet hole communicating with the hot air cavity and the cold air cavity.

[0018] By adopting the above technical solution, the heat insulation cover is used to isolate the heat between the cold air chamber and the hot air chamber. Part of the air flow into the cold air chamber from the intake channel is directly discharged from the exhaust channel through the cooling fan blades, and the other part enters the hot air chamber through the air inlet hole to form hot air. Driven by the hot fan blades, the generated hot air is guided into the cooking chamber to cook the food in the frying basket. After that, the hot air flowing back from the cooking chamber flows back into the hot air chamber from the side. Part of the hot air flowing back to the hot air chamber is blown into the cooking chamber again, and the other part of the hot air enters the cold air chamber through the air outlet channel of the heat insulation cover. Finally, driven by the air-cooling fan blades, the hot air entering the cold air chamber is mixed with the cold air and discharged from the exhaust channel, thereby reducing the temperature of the air flow discharged from the exhaust channel to prevent scalding.

[0019] The present invention is further configured as follows: the hot air generating device also includes a heating tube and a driving motor, the heating tube is fixed in the hot air cavity, the fan blade assembly is coaxially fixed on the output shaft of the driving motor, and a hot air guide surface is provided on one side of the heat insulation cover facing the hot air cavity. Under the guiding action of the hot air guide surface, the hot air in the hot air cavity is guided and blown to the cooking cavity.

[0020] By adopting the above technical solution, the addition of the hot air guide surface is conducive to guiding the hot air in the hot air cavity into the cooking cavity, thereby reducing the generation of noise.

[0021] The present invention is further configured as follows: the cooking body is provided with two heating chambers in the height direction, each of the heating chambers is provided with a frying basket, and the cooking body is vertically arranged with two hot air generating devices corresponding to the two heating chambers.

[0022] By adopting the above technical solution, the setting of two heating chambers can prevent the occurrence of cross-flavor when cooking different ingredients in the corresponding frying baskets. At the same time, the two hot air generating devices can also be individually adjusted to different temperatures to improve the efficiency of cooking ingredients.

[0023] The present invention is further configured as follows: the cooking body is provided with an inner pot, and the inner pot is integrally formed of plastic.

[0024] By adopting the above technical solution, the inner liner prepared by integral plastic molding has high production efficiency and lower manufacturing cost.

[0025] In summary, the present invention has the following beneficial effects:

[0026] An air inlet is provided on one side of the back of the frying basket close to the hot air generating device, and return air holes are provided on both sides of the frying basket close to the air inlet, while a return flow gap is maintained between the two sides of the frying basket and the cooking body. The airflow from the cooking body is sucked into the air intake channel and heated by the hot air generating device to form hot air. The hot air enters the frying basket through the air inlet to heat and cook the food. After that, the hot air in the frying basket is discharged from the side through the return air hole into the heating chamber. The hot air in the heating chamber partially flows back to the hot air generating device through the return flow gap for cyclic heating to realize hot air circulation, and the other part of the hot air is directly discharged from the exhaust channel, which has the effect of circulating hot air heating the food in the frying basket in a horizontal direction and improving the heating efficiency of the food. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the present utility model.

[0028] Figure 2 It is an exploded view of the present utility model.

[0029] Figure 3 It is a rear view of the present utility model.

[0030] Figure 4 This utility model Figure 3 Cross-sectional view of section AA.

[0031] Figure 5 This utility model Figure 4 A partial enlarged view of the middle C area.

[0032] Figure 6 This utility model Figure 4 A view from another perspective.

[0033] Figure 7 This utility model Figure 3 Cross-sectional view of section BB.

[0034] Figure 8 This utility model Figure 7 A partial magnified view of the D area in the middle.

[0035] Figure 9 It is a front view of the utility model partition net.

[0036] Figure 10 It is a structural diagram of the heat insulation cover of the present utility model.

[0037] In the figure: 1. Cooking body; 10. Inner pot; 11. Air intake channel; 12. Exhaust channel; 13. Heating chamber; 131. Guide chamber; 1311. Cold air chamber; 1312. Hot air chamber; 132. Cooking chamber; 14. Air inlet gap; 15. Return flow gap; 16. Guide slope; 2. Hot air generating device; 21. Heating tube; 22. Driving motor; 23. Fan blade assembly; 231. Cold air fan blade; 232. Hot air fan blade; 3. Frying basket; 31. Air inlet hole; 32. Return air hole; 4. Partition; 41. Air inlet hole; 42. Air outlet hole; 5. Heat insulation cover; 51. Air inlet hole; 52. Air outlet hole; 53. Hot air guide surface. DETAILED DESCRIPTION

[0038] The present invention will be further described below with reference to the accompanying drawings.

[0039] An air duct structure of an air fryer, such as Figure 1-8As shown, the cooking body 1 and the hot air generating device 2 are provided. The cooking body 1 is provided with an air intake channel 11 and an air exhaust channel 12. The cooking body 1 is provided with an inner pot 10. The inner pot 10 in this embodiment is formed of an integral plastic. The inner pot 10 prepared by integral plastic molding has high production efficiency and lower manufacturing cost. A heating chamber 13 is formed in the middle of the inner pot 10 to connect the air intake channel 11 and the air exhaust channel 12. A frying basket 3 is provided in the heating chamber 13. A side of the frying basket 3 close to the hot air generating device 2 is provided with a plurality of air inlet holes 31. The frying basket 3 is provided with a plurality of return air holes 32 on the side adjacent to the air inlet holes 31. The side of the frying basket 3 is provided with a plurality of return air holes 32. A return air gap 15 is left between the frying basket 3 and the cooking body 1. After the hot air is discharged from the return air hole 32 to the outside of the frying basket 3, a part of it flows back to the hot air generating device 2 for circulation and heating through the return air gap 15, and the other part of the hot air is discharged from the exhaust duct 12; the frying basket 3 is provided with return air holes 32 on both sides adjacent to the air inlet hole 31, so that the hot air entering the frying basket 3 from the air inlet hole 31 can be divided into two streams and returned from the two sides of the frying basket 3 that are perpendicular to the air inlet direction of the air inlet hole 31, thereby increasing the return air volume of the hot air in the frying basket 3, so that more hot air can circulate in the frying basket 3 per unit time, thereby improving the efficiency of cooking food according to the present invention.

[0040] like Figure 3-6 As shown, an air inlet gap 14 is left between the top of the frying basket 3 and the cooking body 1, so that the hot air generated by the hot air generating device 2 can be partially blown from the top of the frying basket 3 through the air inlet gap 14 to the frying basket 3, thereby increasing the amount of hot air blown to the frying basket 3; so that the hot air generated by the hot air generating device 2 can be partially blown from the top of the frying basket 3 through the air inlet gap 14 to the frying basket 3, thereby increasing the amount of hot air blown to the frying basket 3, and the hot air blown from the air inlet gap 14 to the top of the frying basket 3 is guided from top to bottom into the frying basket 3 under the guiding action of the guide inclined surface 16, thereby improving the baking effect on the upper surface of the food in the frying basket 3.

[0041] like Figure 2 、 Figure 4-7 and Figure 9As shown, a partition net 4 is provided in the heating chamber 13, which divides the heating chamber 13 into a guide chamber 131 and a cooking chamber 132. The partition net 4 is provided with an air inlet hole 41 and an air outlet hole 42 connecting the guide chamber 131 and the cooking chamber 132. The addition of the partition net 4 functionally partitions the internal space of the heating chamber 13, and at the same time prevents the frying basket 3 from being over-inserted into the heating chamber 13 and causing interference and jamming of components. The airflow in the guide chamber 131 flows into the cooking chamber 132 through the air inlet hole 41, and the airflow in the cooking chamber 132 flows back to the guide chamber 131 through the air outlet hole 42, thereby realizing hot air circulation; a plurality of air inlet holes 41 are concentrated in the middle of the partition net 4, and a plurality of air outlet holes 42 are distributed around the plurality of air inlet holes 41, so as to adapt to the air inlet and outlet structure of the air inlet and return side of the back of the frying basket 3.

[0042] like Figure 4-7 and Figure 10 As shown, a heat insulation cover 5 is provided in the guide cavity 131, and the heat insulation cover 5 separates the guide cavity 131 into a cold air cavity 1311 and a hot air cavity 1312. The cold air cavity 1311 is communicated with the air intake channel 11 and the exhaust channel 12 respectively. The hot air generating device 2 includes a fan blade assembly 23, and the fan blade assembly 23 includes a cold air fan blade 231 and a hot air fan blade 232. The cold air fan blade 231 is rotatably arranged in the cold air cavity 1311, and the hot air fan blade 232 is rotatably arranged in the hot air cavity 1312, and the heat insulation cover 5 is provided with a hot air cavity 1311. The air inlet holes 51 and the air outlet holes 52 of the air chamber 1312 and the cold air chamber 1311, the heat insulation cover 5 is used to isolate the heat between the cold air chamber 1311 and the hot air chamber 1312. Part of the air flow sucked into the cold air chamber 1311 from the air intake channel 11 is directly discharged from the exhaust channel 12 through the cold air fan blades 231, and the other part enters the hot air chamber 1312 through the air inlet holes 51 to form hot air. The hot air is driven by the hot air fan blades 232 to guide the generated hot air into the cooking chamber 132 to fry the food in the frying basket frame 3. After cooking, the hot air returning from the cooking cavity 132 flows back into the hot air cavity 1312 from the side, and a part of the hot air returning to the hot air cavity 1312 is blown into the cooking cavity 132 again, and the other part of the hot air passes through the air outlet channel of the heat insulation cover 5 and enters the cold air cavity 1311. Finally, driven by the air-cooling fan blades, the hot air entering the cold air cavity 1311 is mixed with the cold air and discharged from the exhaust channel 12, thereby reducing the temperature of the air discharged from the exhaust channel 12 to prevent burns. The hot air generating device 2 also It includes a heating tube 21 and a driving motor 22. The heating tube 21 is fixed in the hot air cavity 1312. The fan blade assembly 23 is coaxially fixed on the output shaft of the driving motor 22. A hot air guide surface 53 is provided on one side of the heat insulation cover 5 facing the hot air cavity 1312. Under the guiding action of the hot air guide surface 53, the hot air in the hot air cavity 1312 is guided and blown into the cooking cavity 132. The addition of the hot air guide surface 53 is conducive to guiding the hot air in the hot air cavity 1312 into the cooking cavity 132, thereby reducing the generation of noise.

[0043] like Figure 1-4 and Figure 6 As shown, the cooking body 1 has two heating chambers 13 in the height direction, each heating chamber 13 is provided with a frying basket 3, and the cooking body 1 has two hot air generating devices 2 arranged vertically corresponding to the two heating chambers 13. The setting of the two heating chambers 13 can prevent the occurrence of cross-flavor when the corresponding frying baskets 3 cook different ingredients. At the same time, the two hot air generating devices 2 can also be adjusted separately at different temperatures to improve the cooking efficiency of the ingredients; the output shaft of the driving motor 22 is arranged parallel to the horizontal direction of the cooking body 1, and the setting direction of the heating tube 21 is perpendicular to the output shaft of the driving motor 22, so that the driving motor 22 drives the fan blade assembly 23 to blow the generated hot air horizontally to the air inlet 31 side of the frying basket 3, thereby increasing the air volume and wind speed of the hot air entering the frying basket 3, thereby improving the cooking efficiency of the ingredients; it should also be pointed out that the air duct structure in the present invention can be applied to both air fryers with mechanical control buttons and air fryers with electronic touch control panels.

[0044] The basic working principle of the present invention is as follows: an air inlet hole 31 is provided on one side of the back of the frying basket 3 near the hot air generating device 2, and return air holes 32 are provided on both sides of the frying basket 3 near the air inlet hole 31. At the same time, a return flow gap 15 is maintained between the two sides of the frying basket 3 and the cooking body 1. The air flow sucked into the cooking body 1 from the air intake channel 11 is heated by the hot air generating device 2 to form hot air. The hot air enters the frying basket 3 through the air inlet hole 31 to heat and cook the food. Thereafter, the hot air in the frying basket 3 is laterally discharged into the heating chamber 13 through the return air hole 32 from the side. The hot air in the heating chamber 13 partially flows back to the hot air generating device 2 through the return flow gap 15 for cyclic heating to realize hot air circulation, and the other part of the hot air is directly discharged from the exhaust channel 12. This has the effect of circulating hot air and heating the food in the frying basket 3 in a horizontal direction, thereby improving the heating efficiency of the food.

[0045] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. An air duct structure of an air fryer, comprising a cooking body (1) and a hot air generating device (2), wherein the cooking body (1) is provided with an air intake channel (11) and an air exhaust channel (12), and the cooking body (1) is provided with a heating chamber (13) communicating with the air intake channel (11) and the air exhaust channel (12), characterized in that: A frying basket (3) is provided in the heating chamber (13), and a plurality of air inlet holes (31) are provided on a side of the frying basket (3) close to the hot air generating device (2). A plurality of air return holes (32) are provided on a side of the frying basket (3) adjacent to the air inlet holes (31), and a return gap (15) is left between the side of the frying basket (3) and the cooking body (1). Hot air discharged from the return air holes (32) to the outside of the frying basket (3) passes through the return gap (15), and a portion of the hot air is returned to the hot air generating device (2) for circulated heating, while the other portion of the hot air is discharged from the exhaust passage (12).

2. The air duct structure of an air fryer according to claim 1, characterized in that: The frying basket frame (3) is provided with the return air holes (32) on both sides adjacent to the air inlet hole (31).

3. The air duct structure of an air fryer according to claim 1, characterized in that: An air inlet gap (14) is left between the top of the frying basket (3) and the cooking body (1).

4. The air duct structure of an air fryer according to claim 3, characterized in that: The cooking body (1) is provided with a guide slope (16) at the top of the heating chamber (13), and the hot air blown from the air inlet gap (14) to the top of the frying basket (3) is guided by the guide slope (16) and blown into the frying basket (3).

5. The air duct structure of an air fryer according to claim 1, characterized in that: A partition net (4) is provided in the heating chamber (13), and the partition net (4) divides the heating chamber (13) into a flow guiding chamber (131) and a cooking chamber (132). The partition net (4) is provided with an air inlet hole (41) and an air outlet hole (42) for connecting the flow guiding chamber (131) and the cooking chamber (132).

6. The air duct structure of an air fryer according to claim 5, characterized in that: The plurality of air inlet holes (41) are concentratedly distributed in the middle of the partition net (4), and the plurality of air outlet holes (42) are distributed around the plurality of air inlet holes (41).

7. The air duct structure of an air fryer according to claim 5, characterized in that: A heat insulation cover (5) is provided in the guide cavity (131), and the heat insulation cover (5) separates the guide cavity (131) into a cold air cavity (1311) and a hot air cavity (1312). The cold air cavity (1311) is communicated with the air intake channel (11) and the air exhaust channel (12) respectively. The hot air generating device (2) includes a fan blade assembly (23), and the fan blade assembly (23) includes a cold air fan blade (231) and a hot air fan blade (232). The cold air fan blade (231) is rotatably arranged in the cold air cavity (1311), and the hot air fan blade (232) is rotatably arranged in the hot air cavity (1312). The heat insulation cover (5) is provided with an air inlet hole (51) and an air outlet hole (52) communicating with the hot air cavity (1312) and the cold air cavity (1311).

8. The air duct structure of an air fryer according to claim 7, characterized in that: The hot air generating device (2) further comprises a heating tube (21) and a driving motor (22); the heating tube (21) is fixedly arranged in the hot air cavity (1312); the fan blade assembly (23) is coaxially fixedly arranged on the output shaft of the driving motor (22); a hot air guiding surface (53) is provided on one side of the heat insulation cover (5) facing the hot air cavity (1312); under the guiding action of the hot air guiding surface (53), the hot air in the hot air cavity (1312) is guided and blown to the cooking cavity (132).

9. The air duct structure of an air fryer according to claim 8, characterized in that: The cooking body (1) is provided with two heating chambers (13) in the height direction, each of the heating chambers (13) is provided with a frying basket (3), and the cooking body (1) is provided with two hot air generating devices (2) arranged vertically corresponding to the two heating chambers (13).

10. The air duct structure of an air fryer according to claim 1, characterized in that: The cooking body (1) is provided with an inner pot (10), and the inner pot (10) is integrally formed of plastic.

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