Efficient heating type air fryer

Abstract

The invention relates to an efficient heating type air fryer which comprises a shell, a cooking cavity is formed in the shell, a circulating air duct communicated with the cooking cavity is arranged outside the cooking cavity, and a ventilation opening communicated with the circulating air duct is formed in the shell; a heating source which is in thermal contact fit with the outer wall of the cooking cavity is arranged in the circulating air duct; a control system and a driving system electrically connected with the control system are arranged in the shell; a fan assembly connected with the driving system is arranged in the circulating air duct or the cooking cavity, and air heated by the heating source in the circulating air duct is suitable for being driven to the cooking cavity by the fan assembly. According to the air fryer, the circulating air duct is communicated with the cooking cavity, so that the heating source can heat air in the cooking cavity, hot airflow in the circulating air duct can enter the cooking cavity to heat food in the cooking cavity, and the cooking efficiency of the air fryer is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of air fryers, and in particular to a high-efficiency heating air fryer. Background Art

[0002] There are many types of existing air fryers, but most of them use electric heating to cook food. A heating device and a circulating fan are set in the air fryer, and the heating device and the circulating fan are used to produce a high-speed circulating heat flow to cook food. This type of air fryer has a large power consumption and can only be used at home or in places with electricity. It cannot be carried outdoors and has great limitations. In order to meet customer needs, some air fryers that can be carried outdoors have appeared on the market. This type of air fryer uses a combustible heat source to replace the electric heating of traditional air fryers, which greatly reduces the power consumption of the air fryer, so that the air fryer can be carried outdoors. The air fryer can be powered by a portable power supply, a car power supply, etc. to complete cooking. Although this type of air fryer can be carried outdoors, because the heat generated by the heat source does not directly act on the food, but is transferred into the cooking cavity through the outer wall of the cooking cavity to heat the food, the heat transfer loss is large and the cooking speed is slow. Summary of the invention

[0003] The present application provides a high-efficiency heating air fryer to solve the technical problems of slow cooking speed and long waiting time of existing outdoor air fryers.

[0004] In order to solve the above technical problems, the present application provides a high-efficiency heating type air fryer, comprising a shell, a cooking cavity is arranged in the shell, a circulating air duct connected to the cooking cavity is arranged outside the cooking cavity, and a vent connected to the circulating air duct is arranged on the shell; a heat source in thermal contact with the outer wall of the cooking cavity is arranged in the circulating air duct; a control system and a driving system electrically connected to the control system are arranged in the shell; a fan assembly connected to the driving system is arranged in the circulating air duct or the cooking cavity, and the air heated by the heat source in the circulating air duct is suitable to be driven to the cooking cavity by the fan assembly. The air fryer connects the circulating air duct with the cooking cavity, so that the heat source can not only heat the air in the cooking cavity through the outer wall of the cooking cavity to heat the food in the cooking cavity, but also can make the hot air flow heated by the heat source in the circulating air duct enter the cooking cavity to heat the food in the cooking cavity, which effectively improves the cooking efficiency of the air fryer and reduces the waiting time for users to cook.

[0005] In an optional embodiment, the driving system includes a driving motor, which is a speed-regulating motor; a temperature sensor extending to the cooking cavity is provided in the housing, and the temperature sensor is electrically connected to the control system. The driving motor is suitable for cooperating with the fan assembly to adjust the speed at which external air enters the circulating air duct; the temperature sensor is suitable for measuring the temperature in the cooking cavity and feeding back to the control system, and the control system is suitable for controlling and adjusting the speed of the driving motor after receiving the feedback information; the air fryer can automatically adjust the temperature in the cooking cavity through the cooperation of the temperature sensor with the control system and the driving motor, so that the temperature in the cooking cavity is maintained at a preset temperature, effectively improving the cooking effect of the air fryer.

[0006] In an optional embodiment, the heat source is a related heat source affected by oxygen content, and the vent is disposed adjacent to the heat source. By disposing the vent adjacent to the heat source, when external air enters the circulating air duct through the vent, oxygen in the air can quickly contact the heat source, promote combustion of the heat source, and increase the heating speed of the air fryer.

[0007] In an optional embodiment, the vent is provided at the bottom of the shell, and the bottom of the shell is provided with support legs extending downward and a detachable chassis, and the shell is suitable for being suspended on the chassis through the support legs. The support legs are suitable for suspending the shell in the air, so as to reserve enough space at the bottom of the shell for external air to enter the circulating air duct through the vent, so as to ensure normal cooking; the chassis is suitable for providing a stable support surface, so as to ensure normal cooking when the air fryer is used outdoors, and improve the applicability of the air fryer; at the same time, the chassis is also suitable for storing the combustion residues that fall from the vent when the heat source burns, so as to prevent the combustion residues from polluting the environment.

[0008] In an optional embodiment, the heat source is coal, charcoal, alcohol, gas stove or wood. Coal, charcoal, alcohol, gas stove or wood are selected as the heat source. On the one hand, they are easy to carry, and on the other hand, they are widely available and have low cost, which can effectively improve the practicality of the air fryer product.

[0009] In an optional embodiment, the cooking cavity is provided with a communication port communicating with the circulating air duct, the fan assembly is provided in the cooking cavity, and at least a part of the air suction area of ​​the fan assembly is opposite to the communication port. The fan assembly is provided in the cooking cavity, and at least a part of the air suction area is opposite to the communication port, which can not only drive the hot air flow in the cooking cavity to heat the food, but also drive the hot air flow in the circulating air duct to the cooking cavity to heat the food in the cooking cavity, thereby effectively improving the cooking efficiency of the air fryer.

[0010] In an optional embodiment, the heat source is detachably disposed in the circulation duct at the side and / or below the cooking cavity, and cooperates with the outer wall of the cooking cavity for heat transfer. The heat source is detachably disposed in the circulation duct at the side and / or below the cooking cavity, which not only enables the heat source to better cooperate with the inner wall of the cooking cavity for heat transfer, but also enables the replacement of the heat source to ensure normal cooking.

[0011] In an optional embodiment, a fryer is detachably disposed in the housing, a handle is disposed on the side or top of the fryer, the outer wall of the fryer at least partially constitutes the outer wall of the cooking cavity, the heat source is sandwiched between the fryer and the housing, and a food tray or food basket is disposed in the fryer. The fryer is detachably disposed in the housing, and the heat source is sandwiched between the housing and the fryer, which not only facilitates the taking and placing of cooked food, but also facilitates the replacement of the heat source, thereby improving the convenience of use of the air fryer.

[0012] In an optional embodiment, a smoke filter device is provided in the circulating air duct for air flow to pass through, the periphery of the smoke filter device is in contact with the inner wall of the circulating air duct, and the heat flow heated by the heat source in the circulating air duct is suitable for flowing through the smoke filter device into the cooking cavity. The smoke filter device is suitable for filtering smoke carried in the heat flow to prevent the smoke carried in the heat flow from contaminating the food in the cooking cavity, and the smoke filter device can ensure the health and hygiene of the food cooked in the air fryer.

[0013] In an optional embodiment, the smoke filter device is detachably arranged in the circulating air duct. The smoke filter device is detachably arranged in the circulating air duct, which is not only convenient for replacement when damaged, but also convenient for disassembly and cleaning, effectively ensuring the smoke filter effect of the smoke filter device and improving the health and hygiene of food cooked in the air fryer.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] The present application connects the circulating air duct with the cooking cavity, which not only enables the heat source to transfer heat through the outer wall of the cooking cavity to heat the air in the cooking cavity, thereby heating the food in the cooking cavity, but also enables the hot air flow heated by the heat source in the circulating air duct to enter the cooking cavity under the action of the fan assembly to heat the food in the cooking cavity, effectively improving the cooking efficiency of the air fryer and reducing the waiting time for users to cook. At the same time, by arranging a control system, a speed regulating motor electrically connected to the control system, and a temperature sensor extending to the cooking cavity in the outer shell, it is possible to adjust the temperature in the cooking cavity so that the temperature in the cooking cavity is maintained at a preset temperature, effectively improving the cooking effect of the air fryer. In addition, by arranging a smoke filter device in the circulating air duct, it is possible to filter the heat flow entering the cooking cavity to prevent smoke carried in the heat flow from contaminating the food, effectively ensuring the health and hygiene of food cooked in the air fryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a high-efficiency heating type air fryer of the present invention.

[0017] Figure 2 It is a schematic diagram of the structural decomposition of a high-efficiency heating type air fryer of the present invention.

[0018] Figure 3 It is a cross-sectional view of a high-efficiency heating type air fryer of the present invention. DETAILED DESCRIPTION

[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0023] And for ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0024] In addition, it should be noted that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be one or more, and the term "one" cannot be understood as a limitation on the number. The use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as a limitation on the scope of protection of the present invention.

[0025] Attached Figure 1 To Attachment Figure 3 As shown, it is a schematic diagram of a high-efficiency heating type air fryer provided by the present invention, and the high-efficiency heating type air fryer includes a shell 10, a control system 20 and a driving system 30, the control system 20 and the driving system 30 are arranged in the shell 10, the driving system 30 is electrically connected to the control system 20, and the control system 20 is suitable for controlling the operation of the driving system 30.

[0026] like Figure 3 As shown, a cooking cavity 11 is provided inside the housing 10, and the cooking cavity 11 is suitable for cooking food. A circulating air duct 12 is provided outside the cooking cavity 11, and the circulating air duct 12 is at least partially located between the cooking cavity 11 and the housing 10, and the circulating air duct 12 is suitable for being connected to the cooking cavity 11. A vent 13 is provided on the housing 11, and the vent 13 is connected to the circulating air duct 12, and external air is suitable for flowing into the circulating air duct 12 through the vent 13.

[0027] like Figure 3 As shown, a heat source 14 is provided in the circulating air duct 12, and the heat source 14 is suitable for cooperating with the outer wall of the cooking cavity 11 for heat transfer. The heat source 14 is preferably a related heat-generating object affected by oxygen content, such as coal or charcoal or alcohol or a gas stove or wood, etc. The heat source 14 is suitable for burning to generate heat, and the heat generated by the heat source 14 is suitable for heat transfer to the cooking cavity 11 through the outer wall of the cooking cavity 11, so as to heat the air in the cooking cavity 11, thereby heating the food.

[0028] The air fryer selects coal or charcoal or alcohol or gas stove or wood as the heat source, which is easy to carry on the one hand, and on the other hand, such materials are widely available and have low use costs, which can effectively improve the practicality of the air fryer product.

[0029] like Figure 3As shown, the vent 13 is preferably arranged adjacent to the heat source 14. By arranging the vent 13 adjacent to the heat source 14, when external air enters the circulating air duct 12 through the vent 13, oxygen in the air can quickly contact with the heat source 14, thereby promoting the combustion of the heat source 14 and increasing the heating speed of the air fryer.

[0030] like Figure 3 As shown, a fan assembly 15 is provided in the cooking cavity 11, and the fan assembly 15 is driven and connected to the driving system 30. The fan assembly 15 is adapted to rotate under the drive of the driving system 30 to generate a driving force to drive the airflow. The heat flow heated by the heat source 14 in the circulating air duct 12 is adapted to flow into the cooking cavity under the action of the fan assembly 15 to cook the food in the cooking cavity 11. The air fryer connects the circulating air duct 12 with the cooking cavity 11, so that the heat source 14 can not only heat the air in the cooking cavity 11 through the outer wall of the cooking cavity 11 to heat the food in the cooking cavity 11, but also allows the hot air flow heated by the heat source 14 in the circulating air duct 12 to enter the cooking cavity 11 to heat the food in the cooking cavity 11, thereby effectively improving the cooking efficiency of the air fryer and reducing the waiting time for users to cook.

[0031] like Figure 2 and Figure 3 As shown, the drive system 30 includes a drive motor 31 and a plurality of electrical components. The drive motor 31 is suitable for driving and connecting with the fan assembly 15, and the drive motor 31 is preferably a speed-adjustable motor, and the fan assembly 15 is preferably a spiral blade structure. The drive motor 31 is suitable for cooperating with the fan assembly 15 to drive air flow. When the drive motor 31 and the fan assembly 15 are working, the external air is suitable for being sucked into the circulation duct 12 from the vent 13 under the action of the fan assembly 15 to contact with the heat source 14, thereby promoting the combustion of the heat source 14; at the same time, the hot air heated by the heat source 14 is suitable for flowing to the cooking cavity 11 under the drive of the fan assembly 15 to heat the food in the cooking cavity 11. The adjustable speed characteristic of the drive motor 31 enables the drive motor 31 to control the speed and amount of the external air entering the circulation duct 12 through the vent 13 by adjusting the speed when working, thereby controlling the combustion speed of the heat source 14 and achieving the purpose of temperature control.

[0032] like Figure 2 and Figure 3As shown, a temperature sensor 16 is provided in the housing 10, and the temperature sensor 16 is suitable for extending into the cooking cavity 11 and being electrically connected to the control system 20. The temperature sensor 16 is suitable for measuring the temperature in the cooking cavity 11 and feeding back to the control system 20. After receiving the feedback information from the temperature sensor 16, the control system 20 is suitable for adjusting the speed of the driving motor 31 by controlling, thereby adjusting the temperature in the cooking cavity 11.

[0033] The control system 20 is provided with different preset temperatures for different foods. When the air fryer is used to cook food, the control system 20 is adapted to compare the feedback temperature of the temperature sensor 16 with the preset temperature when receiving the feedback temperature. When the feedback temperature of the temperature sensor 16 is higher than the preset temperature, the control system 20 is adapted to control the driving motor 31 to reduce the speed so that the combustion speed of the heat source 14 is reduced, thereby reducing the temperature in the cooking cavity 11; when the feedback temperature of the temperature sensor 16 is lower than the preset temperature, the control system 20 is adapted to control the driving motor 31 to increase the speed so that the combustion speed of the heat source 14 is increased, thereby increasing the temperature in the cooking cavity 11. The air fryer can automatically adjust the temperature in the cooking cavity 11 through the cooperation of the temperature sensor 16, the control system 30 and the driving motor 31, so that the temperature in the cooking cavity 11 is maintained at the preset temperature, thereby effectively improving the cooking effect of the air fryer.

[0034] like Figure 3 As shown, the vent 13 is preferably arranged at the bottom of the shell 10, and a downwardly extending support foot 17 is also provided at the bottom of the shell 10, and the support foot 17 is suitable for suspending the shell 10 to reserve sufficient space at the bottom of the shell 10 for external air to enter the circulation duct 12 through the vent 13, thereby ensuring normal cooking.

[0035] like Figures 1 to 3 As shown, a chassis 40 is detachably provided at the bottom of the housing 10, and the housing 10 is suitable for being suspended on the chassis 40 through the supporting feet 17, and the chassis 40 is suitable for providing a stable and clean supporting surface for the housing 10 to ensure normal cooking. When the air fryer is used outdoors, the air fryer may not be placed stably due to the terrain, and cooking cannot be performed normally. When the air fryer is used outdoors, the vent 13 at the bottom of the housing 10 is easily blocked due to ground factors. Therefore, providing a stable and clean supporting surface at the bottom of the housing 10 can effectively prevent the vent 13 from being blocked, thereby improving the applicability of the air fryer.

[0036] like Figures 1 to 3As shown, the chassis 40 also has a storage cavity 41, and the housing 10 is suitable for being suspended in the storage cavity 41 by the support legs 17, and the storage cavity 41 is suitable for completely covering the bottom of the housing 10. The storage cavity 41 in the air fryer is suitable for storage. When the air fryer is working, the heat source 14 in the circulating air duct 12 burns and generates waste. Since the vent 13 is arranged adjacent to the heat source 14, the waste generated by the combustion of the heat source 14 may fall to the ground through the vent 13 under the action of gravity, causing environmental pollution. Therefore, the storage cavity 41 is suitable for storing the waste generated by the combustion of the heat source 14. In addition, the chassis 40 can also be disassembled and used alone as a storage tray to store garbage generated outdoors to avoid environmental pollution.

[0037] like Figure 3 As shown, the cooking cavity 11 is provided with a communication port 111 communicating with the circulating air duct 12, and when the fan assembly 15 is arranged in the cooking cavity 11, at least a part of the air suction area of ​​the fan assembly 15 is opposite to the communication port 111. The air fryer arranges the fan assembly 15 in the cooking cavity 11, and at least a part of the air suction area is opposite to the communication port 111, which can not only drive the hot air flow in the cooking cavity 11 to heat the food, but also drive the hot air flow in the circulating air duct 12 to the cooking cavity 11 to heat the food in the cooking cavity 11, thereby effectively improving the cooking efficiency of the air fryer.

[0038] like Figure 3 As shown, the heat source 14 is preferably detachably disposed in the circulation duct 12 at the side and / or below the cooking cavity 11, and cooperates with the outer wall of the cooking cavity 11 for heat transfer. The heat source 14 is detachably disposed in the circulation duct at the side and / or below the cooking cavity 11, which not only enables the heat source 14 to better cooperate with the inner wall of the cooking cavity 11 for heat transfer, but also enables the replacement of the heat source 14 to ensure normal cooking.

[0039] like Figure 2 and Figure 3As shown, a fryer 18 is detachably provided in the housing 11, and a receiving cavity 181 with an open top is provided in the fryer 18, the receiving cavity 181 is connected to the cooking cavity 11, and the receiving cavity 181 is suitable for receiving food; a handle 182 is provided on the side or top of the fryer 18, and a user is suitable for moving and disassembling the fryer 18 by holding the handle 182; the outer wall of the fryer 18 at least partially constitutes the outer wall of the cooking cavity 11, and the heat source 14 is sandwiched between the fryer 18 and the housing 10, and a food tray or food basket is provided in the fryer 18. By detachably providing the fryer 18 in the housing 10 and sandwiching the heat source 14 between the housing 10 and the fryer 18, it is not only convenient to take and put the cooked food, but also convenient to replace the heat source 14, which effectively improves the convenience of use of the air fryer.

[0040] like Figure 3 As shown, the shell 10 is also provided with a smoke filter 50 for air flow to pass through. The smoke filter 50 is detachably arranged in the circulating air duct 12. The periphery of the smoke filter 50 is suitable for being attached to the inner wall of the circulating air duct 12. The smoke filter 50 is suitable for filtering. The heat flow heated by the heat source 14 in the circulating air duct 12 is suitable for flowing through the smoke filter 50 and then entering the cooking cavity 11. The smoke filter 50 is suitable for filtering the smoke carried in the heat flow to prevent the smoke carried in the heat flow from polluting the food in the cooking cavity 11. The smoke filter 50 can ensure the health and hygiene of the food cooked by the air fryer. In addition, the smoke filter 50 is detachably arranged in the circulating air duct 12, which is not only convenient for replacement in case of damage, but also convenient for disassembly and cleaning, which effectively ensures the smoke filtering effect of the smoke filter 50 and improves the health and hygiene of the food cooked by the air fryer.

[0041] like Figure 3 As shown, the housing 10 is further provided with an air outlet assembly 60, and the air outlet assembly 60 has an air outlet channel 61 for air flow; the housing 10 is provided with an air outlet 19, one end of the air outlet assembly 60 is connected to the cooking cavity 11, and the other end extends through the circulating air duct 12 and then connected to the air outlet 19, and the circulating heat flow in the cooking cavity 11 is suitable for being discharged through the air outlet assembly 60. The circulating heat flow in the cooking cavity 11 can be directly discharged out of the housing 10 through the air outlet assembly 60, effectively preventing the heat flow in the cooking cavity 11 from convecting with the heat flow in the circulating air duct 12, causing the heat flow in the circulating air duct 12 to be unable to enter the cooking cavity 13, affecting the normal cooking.

[0042] Embodiment 2:

[0043] Compared with the air fryer in the first embodiment, the air fryer in the second embodiment has some identical structural features and working principles, which will not be elaborated here. The difference lies in the different setting position of the fan assembly.

[0044] The fan assembly 15 in the second embodiment is arranged in the circulating air duct 12. Setting the fan assembly 15 in the circulating air duct 12 can reduce the distance between the fan assembly 15 and the vent 13, thereby reducing the driving force loss caused by the distance, improving the driving effect of the fan assembly 15, and increasing the amount and speed of external air entering the circulating air duct 12.

[0045] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and the purpose of the present invention has been fully and effectively achieved. Those skilled in the art should understand that the embodiments of the present invention shown in the above description and the accompanying drawings are only examples and do not limit the present invention. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the scope of patent protection determined by the claims submitted by the present invention.

Claims

1. A high-efficiency heating air fryer, comprising a housing, characterized in that: A cooking cavity is provided in the outer shell, a circulating air duct connected to the cooking cavity is provided outside the cooking cavity, and a vent connected to the circulating air duct is provided on the outer shell; a heat source that is in thermal contact with the outer wall of the cooking cavity is provided in the circulating air duct; a control system and a driving system electrically connected to the control system are provided in the outer shell; a fan assembly connected to the driving system is provided in the circulating air duct or the cooking cavity, and the air heated by the heat source in the circulating air duct is suitable to be driven to the cooking cavity by the fan assembly.

2. A high-efficiency heating air fryer according to claim 1, characterized in that: The driving system comprises a driving motor, which is a speed-regulating motor; a temperature sensor extending to the cooking cavity is arranged in the housing, and the temperature sensor is electrically connected to the control system.

3. A high-efficiency heating air fryer according to claim 2, characterized in that: The heat source is a related heat generating object affected by oxygen content, and the vent is arranged adjacent to the heat source.

4. The high-efficiency heating air fryer according to claim 3, characterized in that: The vent is arranged at the bottom of the shell. The bottom of the shell is provided with support legs extending downward and a detachable bottom plate. The shell is suitable for being suspended on the bottom plate through the support legs.

5. The high-efficiency heating air fryer according to claim 3, characterized in that: The heat source is coal, charcoal, alcohol, a gas stove or wood.

6. The high-efficiency heating air fryer according to claim 1, characterized in that: The cooking cavity is provided with a communication port communicating with the circulating air duct, the fan assembly is arranged in the cooking cavity, and at least a part of the air suction area of ​​the fan assembly is opposite to the communication port.

7. The high-efficiency heating air fryer according to claim 1, characterized in that: The heat source is detachably disposed in the circulation air duct at the side and / or below the cooking cavity and cooperates with the outer wall of the cooking cavity for heat transfer.

8. A high-efficiency heating air fryer according to any one of claims 1 to 7, characterized in that: A fryer is detachably disposed in the shell, a handle is disposed on the side or top of the fryer, an outer wall of the fryer at least partially constitutes an outer wall of the cooking cavity, the heat source is sandwiched between the fryer and the shell, and a food tray or food basket is disposed in the fryer.

9. A high-efficiency heating air fryer according to any one of claims 1 to 7, characterized in that: A smoke filter device is provided in the circulating air duct for air flow to pass through, and the periphery of the smoke filter device is in contact with the inner wall of the circulating air duct. The heat flow heated by the heat source in the circulating air duct is suitable for flowing through the smoke filter device and entering the cooking cavity.

10. The high-efficiency heating air fryer according to claim 9, characterized in that: The smoke and dust filtering device is detachably arranged in the circulating air duct.

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