Air fryer

Abstract

The application relates to an air fryer, comprising: a shell provided with a cooking chamber for accommodating food and a first chamber for accommodating electronic elements, the temperature of the first chamber being lower than that of the cooking chamber; a heater connected to the shell and configured to heat air, the heater having a cold end and a hot end; the cold end of the heater is located in the first chamber, and the hot end of the heater is located in the cooking chamber, so that the low-temperature airflow in the first chamber is heated by the cold end before being combined with the high-temperature airflow from the cooking chamber. The air fryer can greatly reduce the condensate water generated after the mixing of the two airflows, and greatly reduce the condensate water dripping back to the cooking chamber or seeping into the machine, thereby guaranteeing the cooking quality and use safety of the air fryer.

Description

Technical Field

[0001] This application relates to the field of cooking equipment technology, and in particular to an air fryer. Background Technology

[0002] An air fryer is a kitchen appliance perfectly suited for modern people who value a healthy and convenient lifestyle. Through innovative hot air circulation technology, it can produce a crispy texture similar to deep-frying with very little oil, significantly reducing oil intake. It is also easy to operate and clean.

[0003] Air fryers typically consist of a cooking chamber and a first chamber. The cooking chamber contains the food to be cooked. When the air fryer is working, the cooking chamber contains hot and humid air. The high temperature comes from the heating element, and the high humidity comes from the moisture evaporated from the food during cooking. The first chamber is mainly used to cool electronic components, the outer casing, and other parts; therefore, the air temperature inside the first chamber is much lower than the air temperature inside the cooking chamber.

[0004] When two streams of air with a significant temperature difference mix, the water vapor in the air easily condenses into water droplets, known as condensation. Condensation can affect the crispness of cooked food, seep into electronic components, and cause water accumulation.

[0005] For example, Chinese patent CN202010836731.5 provides an air outlet structure for an air fryer with steaming and cooking functions. By setting an arc-shaped protruding enclosure (14) on the lower part of the outer side of the air outlet cover (mask 12), the condensate water is trapped inside the enclosure by utilizing its "high on the outside and low on the inside" shape. The bottom surface of the air outlet cover base (2) is made into a slope, and a drain opening (13) is reserved at its end. After the condensate water is trapped at the enclosure, it flows into the opening by gravity along the slope, which can completely prevent the condensate water from dripping onto the table.

[0006] However, the above solution requires the addition of components such as an air outlet cover, an air outlet cover base, and limiting parts, which are complex in structure and inconvenient for maintenance and disassembly.

[0007] To address the aforementioned technical issues, Chinese patent CN202020831948.2 provides a safe air fryer that eliminates condensation at its source by installing an "anti-condensation section" along the steam flow path. This involves using an auxiliary heating element to reheat the steam near the exhaust tail end, keeping it in a gaseous state and preventing condensation from forming inside the exhaust assembly.

[0008] The above solution requires the separate installation of auxiliary heating components, which increases the number of parts and wiring complexity of the air fryer.

[0009] To address the aforementioned technical issues, Chinese patent CN202320598379.5 provides an air fryer that, by setting a hot end and a cold end on the heating element, with the cold end having a lower temperature than the hot end, defines the area formed by the angle between the motor shaft and the two cold ends as a "low-temperature zone." The exhaust port is positioned horizontally within this low-temperature zone to prevent steam from being reheated to a higher temperature before being exhausted, thus slowing down the steam temperature and reducing the risk of condensation. The exhaust port is located outside the cooling fan, and the cold air blown by the fan causes the steam to cool and condense, forming condensate that flows back into the cooking chamber.

[0010] However, the above solution sets the cooking chamber and the first chamber as independent channels and uses a cooling fan to lower the gas temperature before exhausting it from the air fryer in order to avoid the exhaust gas temperature being too high. This not only requires the addition of an extra cooling fan, but also does not fully utilize the heat energy inside the air fryer. Utility Model Content

[0011] This invention addresses the technical problem in the prior art where, after the high-temperature, high-humidity airflow in the cooking cavity is directly mixed with the low-temperature, dry airflow in the first chamber, the temperature of the high-temperature, high-humidity airflow drops rapidly, leading to a large amount of water vapor condensing.

[0012] This application provides an air fryer, the air fryer comprising: The housing includes a cooking chamber for containing food and a first chamber for containing electronic components, wherein the temperature of the first chamber is lower than the temperature of the cooking chamber. A heater, connected to a housing, is configured to heat air, the heater having a cold end and a hot end; The cold end of the heater is located in the first chamber, and the hot end of the heater is located in the cooking chamber, such that the low-temperature airflow through the first chamber is heated by the cold end before merging with the high-temperature airflow from the cooking chamber.

[0013] In conjunction with a first aspect of this application, in an alternative embodiment, the first chamber includes an exhaust duct for venting exhaust, and at least one of the cold ends is located in the exhaust duct.

[0014] In conjunction with the first aspect of this application, in an optional embodiment, the housing is further provided with a heat dissipation channel, the heat dissipation channel being connected to the cooking chamber and the first chamber, so that the airflow discharged from the first chamber and the airflow discharged from the cooking chamber can be mixed in the heat dissipation channel before being discharged from the air fryer.

[0015] In conjunction with the first aspect of this application, in an optional embodiment, the first chamber includes an air outlet channel for exhaust, the housing includes a heat dissipation housing and a cooking housing, the heat dissipation housing, the cooking housing and the side wall of the housing surround the first chamber, and the cooking housing and the side wall of the housing surround the cooking chamber; A first fan, connected to the housing and located within the first cavity, is configured to generate airflow to remove heat generated by the electronic components; The heat dissipation housing is provided with multiple first air inlets. Under the action of the first fan, cold air flows through the multiple first air inlets into the first chamber.

[0016] In conjunction with the first aspect of this application, in an optional embodiment, the air fryer further includes: A second fan, connected to the housing and disposed adjacent to the heater, is configured to generate airflow so that hot air heated by the heater flows over the food surface.

[0017] In conjunction with the first aspect of this application, in an optional embodiment, the air fryer further includes: A drive unit is connected to the housing and is drive-connected to the first fan and the second fan. The first fan and the second fan rotate under the drive of the drive unit and generate airflow.

[0018] In conjunction with the first aspect of this application, in an optional embodiment, the heater is a heating tube, the two ends of the heating tube are the cold ends, the cold ends extend along a second direction, the second direction being the height direction of the housing.

[0019] In conjunction with the first aspect of this application, in an alternative embodiment, the cold end of the heater is located within the air outlet channel and is disposed close to the heat dissipation channel.

[0020] In conjunction with the first aspect of this application, in an optional embodiment, the air fryer further includes: A flow guide, connected between the cooking chamber and the heat dissipation channel, is configured to direct hot air exhausted from the cooking chamber toward the heat dissipation channel.

[0021] In conjunction with the first aspect of this application, in an optional embodiment, the housing includes a first housing forming a top surface and a second housing forming a side surface, with an annular groove formed between the first housing and the second housing, and a plurality of second air inlets provided on the top of the second housing, the plurality of second air inlets being located within the groove.

[0022] Compared with the prior art, the embodiments of this application have at least the following beneficial effects: The air fryer provided in this application embodiment, by placing the cold end of the heater in the first chamber, heats the air in the first chamber using the cold end of the heater. This greatly reduces the temperature difference between the airflow discharged from the first chamber and the airflow discharged from the cooking chamber, thereby significantly reducing the occurrence of condensation after the two airflows mix. It also greatly reduces the occurrence of condensation dripping back into the cooking chamber or seeping into the machine, ensuring the cooking quality and safety of the air fryer. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A three-dimensional structural diagram of an air fryer provided in an embodiment of this application; Figure 2 A three-dimensional structural diagram of the air fryer provided in an embodiment of this application from another angle; Figure 3 for Figure 1 A sectional view of part of the structure at point AA; Figure 4 for Figure 3 Enlarged view of point B in the middle; Figure 5 This is a cross-sectional schematic diagram of an air fryer provided in an embodiment of this application.

[0024] Figure label: 100. Air fryer; 10. Housing; 11. First housing; 12. Second housing; 121. Second air inlet; 122. Air outlet; 1a. First chamber; 1a1. Air outlet channel; 1b. Cooking chamber; 1c. Heat dissipation channel; 1d. Groove; 13. Heat dissipation housing; 131. First air inlet; 14. Cooking housing; 20. Pot basket; 21. Receiving cavity; 22. Handle; 30. First fan; 40. Heater; 41. Cold end; 42. Hot end; 43. Heating tube; 50. Second fan; 60. Driving component; 70. Flow guide component. Detailed Implementation

[0025] To make the technical solution and beneficial effects of this utility model more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0026] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this utility model.

[0027] In this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly indicate that at least one of those features is included. In the description of this utility model, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly defined, the terms "above," "on top of," "above," "over," "below," "below," "below," or "below" for "first feature above second feature" can refer to direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Furthermore, "above," "above," and "over" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0030] This application provides an air fryer 100, please refer to the following embodiments. Figure 1 The air fryer 100 includes two baskets 20. The two baskets 20 can cook food individually or at the same time. Of course, the number of baskets 20 provided in the air fryer 100 is not limited in this embodiment of the application. For example, the number of baskets 20 can also be three or four.

[0031] Please refer to Figures 1 to 5 The air fryer 100 provided in this application embodiment includes a shell 10, a basket 20, a first fan 30, a second fan 50, a heater 40, and a drive unit 60.

[0032] The housing 10 has a first chamber 1a inside, which is used to house electronic components, including power supplies, control boards, and other components. The housing 10 has an air outlet 122 and multiple second air inlets 121. Cold air enters the housing 10 from the multiple second air inlets 121 and is discharged from the air outlet 122 to remove the heat generated inside the housing 10.

[0033] The pot basket 20 has a receiving cavity 21 for containing food, and the pot basket 20 is configured to be able to be in a first direction (i.e., Figure 3 It can reciprocate along the X-axis direction in the coordinate system shown in the figure, so as to be in a closed position that is accommodated in the cooking chamber 1b or in an open position that is moved out of the cooking chamber 1b. Figure 1 The diagram shows the closed position of the pot basket 20 housed within the cooking chamber 1b.

[0034] The pot basket 20 is connected to a handle 22 to facilitate the operator to switch the pot basket 20 between the closed and open positions.

[0035] The drive unit 60 is connected to the housing 10 and located above the first chamber 1a. Cold air enters the housing 10 through the second air inlet 121, flows through the drive unit 60, and the heat generated by the drive unit 60 is discharged from the housing 10 through the first chamber 1a. The drive unit 60 can be a rotary motor, but is not limited to this. The output shaft of the drive unit 60 passes through the first chamber 1a and extends into the cooking chamber 1b, so as to connect with both the first fan 30 and the second fan 50. It can be understood that the first fan 30 and the second fan 50 work synchronously under the action of the drive unit 60, and generate airflow in the first chamber 1a and the cooking chamber 1b respectively.

[0036] The heater 40 is connected to the housing 10 and disposed adjacent to the second fan 50. The heater 40 is configured to heat the air. When the basket 20 is in the closed position, the space occupied by the second fan 50 and the heater 40 communicates with the receiving cavity 21 and the cooking chamber 1b of the basket 20. It can be understood that the food contained in the receiving cavity 21 of the basket 20, the second fan 50, and the heater 40 are all located in the cooking chamber 1b. The second fan 50 generates a hot airflow from the air heated by the heater 40 and applies it to the surface of the food to achieve cooking.

[0037] In related technologies, the air discharged from cooking chamber 1b has a higher temperature and humidity, while the air discharged from the first chamber 1a is lower in temperature and drier. When the two air streams with a large temperature difference mix, the temperature drops rapidly, and the resulting air temperature decreases, leading to condensation. This condensation may form on the inner wall of the exhaust duct. Since the exhaust duct is usually located above cooking chamber 1b, this condensation may drip back into cooking chamber 1b or seep into the machine.

[0038] Based on this, the air fryer 100 provided in this application embodiment sets the cold end 41 of the heater 40 in the first chamber 1a to heat the air in the first chamber 1a using the cold end 41 of the heater 40. This greatly reduces the temperature difference between the airflow discharged from the first chamber 1a and the airflow discharged from the cooking chamber 1b, thereby greatly reducing the occurrence of condensation after the two airflows mix. It also greatly reduces the occurrence of condensation dripping back into the cooking chamber 1b or seeping into the machine, ensuring the cooking quality and safety of the air fryer 100.

[0039] For details, please refer to Figures 3 to 5The cold end 41 of the heater 40 is located in the first chamber 1a, and the hot end 42 of the heater 40 is located in the cooking chamber 1b. The air in the first chamber 1a is heated by the cold end 41 and then mixed with the air in the cooking chamber 1b before being discharged outside the housing 10. This can be understood as the low-temperature airflow from the first chamber 1a being heated by the cold end 41 before merging with the high-temperature airflow from the cooking chamber 1b, thereby reducing the temperature difference between the airflow from the first chamber 1a and the airflow from the cooking chamber 1b, further reducing the likelihood of condensation after mixing.

[0040] In an optional embodiment, the heater 40 is a heating tube 43, with the hot end 42 of the heating tube 43 arranged horizontally; the cold end 41 of the heating tube 43 extends from the hot end 42 of the heating tube 43 and is bent to form a straight line, with one or both cold ends 41 of the heating tube 43 along a second direction (i.e., Figure 3 The coordinate system shown in the figure extends along the Z-axis and penetrates the first chamber 1a. The temperature obtained by the heater 40 hot end 42 after heating the surrounding air is much greater than the temperature obtained by the heater 40 cold end 41 after heating the surrounding air.

[0041] The present application embodiment improves the structure of the original heating tube 43 so as to realize the heating of the first chamber 1a by using the original heating tube 43 without adding a separate heating device. This can greatly reduce the generation of condensate water and greatly simplify the structural complexity.

[0042] In this embodiment, the hot end of the heating tube 43 is its heating section. The resistance heating element (e.g., resistance wire, thick film heating layer, PTC heating element) in the heating tube 43 corresponds to the heating section and is the effective heating section, which is used to provide the main heat to the air / food in the cooking chamber.

[0043] In this embodiment, the cold end of the heating tube 43 is its non-heating section / lead-out end, which refers to the end section that does not contain a resistance heating element. It is usually used for electrical connection and mechanical holding / sealing, and is not used to directly heat the food.

[0044] This can be understood as follows: the portion of the heating element 43 located within the cooking chamber 1b is the heating section, i.e., the hot end of the heating element 43. The portion of the heating element 43 located within the first chamber 1a or other air outlet channels is the non-heating section, i.e., the cold end of the heating element 43.

[0045] On the other hand, the "cold end" in this embodiment is only lower in temperature relative to the "hot end". Because it is closely connected to the hot end and is energized, its actual temperature is much higher than the ambient temperature (for example, it may reach 80-150°C, depending on the power and material of the heating tube).

[0046] In an alternative embodiment, the first chamber 1a includes an exhaust duct 1a1 for exhausting air, and at least one cold end of the heating tube 43 is located in the exhaust duct 1a1.

[0047] In some embodiments, both cold ends are located within the air outlet duct 1a1. The two cold ends of the heating tube 43 can be arranged on both sides of the air outlet duct 1a1 or in a wider area to ensure that most of the passing cold air can be effectively preheated and the airflow flowing through the entire air outlet duct 1a1 can be heated more evenly.

[0048] In some embodiments, if the diameter and flow rate of the air outlet 1a1 are too small, a cold end of the heating tube 43 can be arranged to prevent the heat in the air outlet 1a1 from being too concentrated, resulting in the air temperature after merging still being high.

[0049] In an optional embodiment, the housing 10 is further provided with a heat dissipation channel 1c, which connects the cooking chamber 1b and the first chamber 1a, so that the air flow discharged from the first chamber 1a and the air flow discharged from the cooking chamber 1b can mix in the heat dissipation channel 1c and then be discharged from the housing 10.

[0050] The airflow temperature inside the cooking chamber 1b is relatively high, for example, about 200°C. If it is directly discharged from the shell 10, it could burn the operator. By mixing the high-temperature and high-humidity airflow discharged from the cooking chamber 1b with the airflow from the first chamber 1a, the temperature of the airflow discharged from the shell 10 can be greatly reduced, thereby avoiding burns to the operator and ensuring the safety of using the air fryer 100.

[0051] In an optional embodiment, the housing 10 includes a heat dissipation housing 13 and a cooking housing 14. The heat dissipation housing 13, the cooking housing 14, and the side walls of the housing 10 form the first chamber 1a. The cooking housing 14, the basket 20, and the side walls of the housing 10 form the cooking chamber 1b. The drive member 60 corresponds to a plurality of first air inlets 131 provided on the heat dissipation housing 13. Under the action of the first fan 30, cold air flows through the drive member 60 and into the first chamber 1a through the plurality of first air inlets 131.

[0052] In some embodiments, the cooking chamber 1b may also be enclosed only by the cooking shell 14 and the side walls of the shell 10 (without the basket 20 as a wall).

[0053] The specific structures of the heat dissipation shell 13 and the cooking shell 14 can be set according to requirements, and are not limited in the embodiments of this application.

[0054] Figure 3The arrows in the diagram illustrate the direction of airflow. This can be understood as follows: cold air enters the housing 10 through multiple second air inlets 121. Under the action of the drive unit 60, the first fan 30 and the second fan 50 rotate and generate airflow, allowing the cold air entering the housing 10 to flow through the drive unit 60 and through the multiple first air inlets 131 on the heat dissipation housing 13 into the first chamber 1a. This cold air not only dissipates heat from the drive unit 60 but also from components such as the power supply located in the first chamber 1a, ensuring the safety and stability of the air fryer 100.

[0055] In some embodiments, the two cold ends 41 of the heating tube 43 are positioned close to the heat dissipation channel 1c, so that the cold ends of the heating tube 43 are also close to the cooking chamber 1b. In other words, the temperature of the hot end of the heating tube 43 near the heat dissipation channel is lower than the temperature away from the heat dissipation channel, which can prevent the airflow discharged from the cooking chamber 1b from being reheated and further reduce the temperature difference between the airflow discharged from the cooking chamber 1b and the airflow discharged from the first chamber 1a.

[0056] The two cold ends 41 of the heating tube 43 are positioned close to the heat dissipation channel 1c to greatly reduce the impact of the heated air on the electronic components in the first chamber 1a, thus affecting the heat dissipation effect of the electronic components. In addition, after heating the air in the first chamber 1a, it can quickly mix with the high-temperature and high-humidity airflow in the cooking chamber 1b, which can greatly reduce the amount of heat loss.

[0057] In one alternative embodiment, please refer to Figures 3 to 5 The air fryer 100 also includes a guide 70, which is connected between the cooking chamber 1b and the heat dissipation channel 1c. The guide 70 is configured to discharge hot air from the cooking chamber 1b to the heat dissipation channel 1c.

[0058] In this embodiment, the air guide 70 can be a cover structure or a plate structure, etc. This embodiment does not limit it, as long as it can guide the high temperature and high humidity airflow discharged from the cooking chamber 1b to the heat dissipation channel 1c.

[0059] The embodiment of this application utilizes the flow guide 70 to allow most or all of the airflow discharged from the cooking chamber 1b to flow into the heat dissipation channel 1c, which can greatly reduce the flow of airflow discharged from the cooking chamber 1b to the first chamber 1a.

[0060] In an optional embodiment, the housing 10 includes a first housing 11 forming a top surface and a second housing 12 forming a side surface. The first housing 11 and the second housing 12 form an annular groove 1d. The top of the second housing 12 is provided with a plurality of second air inlets 121, which are located within the groove 1d.

[0061] The annular groove 1d is provided with multiple second air inlets 121, which can increase the flow rate of cold air entering the housing 10, thereby ensuring the heat dissipation effect on electronic components and the mixing effect with the air flow discharged from the cooking chamber 1b.

[0062] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. An air fryer, characterized in that, The air fryer (100) includes: The housing (10) is provided with a cooking chamber (1b) for containing food and a first chamber (1a) for containing electronic components, wherein the temperature of the first chamber (1a) is lower than the temperature of the cooking chamber (1b); A heater (40), connected to the housing (10), is configured to heat air, the heater (40) having a cold end (41) and a hot end (42). The cold end (41) of the heater (40) is located in the first chamber (1a), and the hot end (42) of the heater (40) is located in the cooking chamber (1b), such that the low-temperature airflow through the first chamber (1a) is heated by the cold end (41) before merging with the high-temperature airflow from the cooking chamber (1b).

2. The air fryer according to claim 1, characterized in that, The first chamber (1a) includes an exhaust duct (1a1) for exhausting air, and at least one of the cold ends (41) is located in the exhaust duct (1a1).

3. The air fryer according to claim 2, characterized in that, The housing (10) is also provided with a heat dissipation channel (1c), which is connected to the cooking chamber (1b) and the first chamber (1a) so that the air flow discharged from the first chamber (1a) and the air flow discharged from the cooking chamber (1b) can be mixed in the heat dissipation channel (1c) and then discharged from the air fryer (100).

4. The air fryer according to claim 1, characterized in that, The first chamber (1a) includes an air outlet duct (1a1) for exhausting air. The housing (10) includes a heat dissipation housing (13) and a cooking housing (14). The heat dissipation housing (13), the cooking housing (14) and the side walls of the housing (10) form the first chamber (1a). The cooking housing (14) and the side walls of the housing (10) form the cooking chamber (1b). A first fan (30), connected to the housing (10) and located within the first chamber (1a), is configured to generate airflow to remove heat generated by the electronic components; The heat dissipation housing (13) is provided with multiple first air inlets (131). Under the action of the first fan (30), cold air flows through the multiple first air inlets (131) into the first chamber (1a).

5. The air fryer according to claim 4, characterized in that, The air fryer (100) also includes: A second fan (50), connected to the housing (10) and disposed adjacent to the heater (40), is configured to generate airflow so that hot air heated by the heater (40) flows over the food surface.

6. The air fryer according to claim 5, characterized in that, The air fryer (100) also includes: A drive unit (60) is connected to the housing (10) and is drive-connected to the first fan (30) and the second fan (50). The first fan (30) and the second fan (50) rotate under the drive of the drive unit (60) and generate airflow.

7. The air fryer according to claim 3, characterized in that, The heater (40) is a heating tube (43), and the two ends of the heating tube (43) are the cold ends (41). The cold ends (41) extend along a second direction, which is the height direction of the housing (10).

8. The air fryer according to claim 7, characterized in that, The cold end (41) of the heater (40) is located in the air outlet channel (1a1) and is positioned close to the heat dissipation channel (1c).

9. The air fryer according to claim 3, characterized in that, The air fryer (100) also includes: A flow guide (70), connected between the cooking chamber (1b) and the heat dissipation channel (1c), is configured to discharge hot air from the cooking chamber (1b) to the heat dissipation channel (1c).

10. The air fryer according to claim 1, characterized in that, The housing (10) includes a first housing (11) forming a top surface and a second housing (12) forming a side surface. An annular groove (1d) is formed between the first housing (11) and the second housing (12). The top of the second housing (12) is provided with a plurality of second air inlets (121), which are located in the groove (1d).

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