Air fryer

Abstract

The air fryer comprises a machine body, a cooking cavity is formed in the machine body, a heating piece and a centrifugal fan are arranged at the upper end of the interior of the cooking cavity, the heating piece comprises a first heating pipe and a second heating pipe which are arranged below the centrifugal fan, and the second heating pipe is arranged below the first heating pipe; the horizontal projection of the second heating pipe and the horizontal projection of the first heating pipe at least partially coincide within the horizontal projection range of the outer edge of the centrifugal fan. The second heating pipe is lower than the first heating pipe, the radiation heating effect on central food materials can be enhanced, meanwhile, the horizontal projection of the second heating pipe and the horizontal projection of the first heating pipe at least partially coincide in the horizontal projection range of the outer edge of the centrifugal fan, radiation temperature rise of the second heating pipe can be achieved, the problem that the central temperature is insufficient is solved, and the service life of the central food materials is prolonged. In addition, in the upward air suction process of the centrifugal fan, the return air can be secondarily heated by the first heating pipe after being preliminarily heated by the second heating pipe, and the return air temperature can be increased.

Description

Technical Field

[0001] This utility model relates to the field of small household appliances, specifically to an air fryer. Background Technology

[0002] Common air fryers typically use a single heating element, which results in low heating efficiency and uneven heating of food. This is not conducive to improving the cooking effect of food in the cooking cavity and makes it difficult to meet the diverse needs of cooking.

[0003] To meet market demand, air fryers with dual heating elements have become a research hotspot in recent years. Currently available dual heating element solutions typically arrange the two heating elements based on installation angle considerations, which still falls short in improving the heating effect within the cooking cavity. For example, patent CN202223609786.6 discloses an air fryer where the two heating elements are arranged internally and externally on the same horizontal plane, facilitating their fixation. While the inner heating element provides supplemental heat to improve the heating effect on the food in the central area, the temperature of the hot air blown towards the food from the outer perimeter remains low, resulting in uneven heating between the central and peripheral areas and poor overall cooking performance.

[0004] In addition, existing heating elements are also distributed at different heights. For example, patent CN202222069079.6 discloses an air fryer in which two heating elements are completely overlapped vertically. Although this is convenient for fixing and the simultaneous operation of the two heating elements can improve heating efficiency, both heating elements are located outside the fan, resulting in a low temperature in the central area. This is not conducive to heating the food in the central area of ​​the cooking cavity, resulting in poor taste of the food in that area. Utility Model Content

[0005] This invention provides an air fryer designed to solve the technical problems of insufficient central temperature or low hot air temperature in the cooking cavity caused by unreasonable distribution of existing dual heating tubes.

[0006] This utility model discloses an air fryer, which includes a body and a cooking chamber. The upper part of the cooking chamber is provided with a heating element and a centrifugal fan. The heating element includes a first heating tube and a second heating tube disposed below the centrifugal fan. The second heating tube is disposed below the first heating tube. The horizontal projections of the second heating tube and the first heating tube at least partially overlap within the horizontal projection range of the outer edge of the centrifugal fan.

[0007] The air fryer of this utility model also has the following additional technical features:

[0008] The horizontal projections of the second heating tube and the first heating tube do not partially overlap within the horizontal projection range of the outer edge of the centrifugal fan.

[0009] The second heating tube and the first heating tube are arranged at a distance in the vertical direction, and the vertical distance between the second heating tube and the first heating tube does not exceed 10mm.

[0010] The difference between the power of the second heating element and the power of the first heating element is not less than 1000W.

[0011] The second heating tube is a single horizontal strip tube, and the centrifugal fans are symmetrically distributed about the central axis of the second heating tube.

[0012] The second heating tube is a single C-shaped heating tube arranged horizontally, and the horizontal projection of the second heating tube surrounds the outer side of a portion of the horizontal projection of the first heating tube.

[0013] The first heating tube is a horizontally arranged multi-turn threaded tube, and the horizontal projection of the outer edge of the first heating tube surrounds the outer side of the horizontal projection of the centrifugal fan.

[0014] The first heating tube is a horizontally arranged multi-turn threaded tube. The air fryer includes a reflector, a pot body, and a first fixing member. The reflector and the pot body enclose the cooking cavity. The first fixing member includes a clamping part and a fixing part. The clamping part includes multiple slots with spaced lateral openings. Multiple spiral segments of the first heating tube are respectively horizontally clamped into the multiple slots. The fixing part is fixed to the reflector.

[0015] The fixing part includes a horizontal mounting part that protrudes upward relative to the clamping part and a vertical mounting part that extends downward from the horizontal mounting part. Both the horizontal mounting part and the vertical mounting part are provided with screw holes. The horizontal mounting part is fixed to the top wall of the reflector by fasteners, and the vertical mounting part is fixed to the side wall of the reflector by fasteners.

[0016] The second heating tube is a horizontally extending strip tube, and the inner end of the clamping part is provided with a collar located below the slot, and the end of the second heating tube is clamped in the collar; or, the second heating tube is a C-shaped heating tube, and the air fryer also includes a second fixing member, the second fixing member including a tube clamp and an extension arm connected to the tube clamp, the second heating tube is clamped in the tube clamp, and the extension arm is fixed to the reflector.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects:

[0018] 1. The air fryer of this utility model, with dual heating tubes, is vertically positioned at different heights, with the second heating tube lower than the first. This enhances the radiative heating effect on the central food. Simultaneously, the horizontal projections of the second and first heating tubes at least partially overlap within the horizontal projection range of the centrifugal fan's outer edge. This ensures that the first and second heating tubes overlap to some extent in the vertical direction within the centrifugal fan's suction area. Firstly, this allows for radiative heating of the second heating tube, addressing the issue of insufficient central temperature. Secondly, during the upward suction of the centrifugal fan, the return air, after being initially heated by the second heating tube, is further heated by the first heating tube, thus increasing the return air temperature. This, in turn, raises the temperature of the hot air blown towards the food. Consequently, both the central and peripheral food within the cooking cavity are fully heated, improving the overall heating uniformity and enhancing the food's texture.

[0019] The horizontal projections of the second heating tube and the first heating tube at least partially overlap within the horizontal projection range of the outer edge of the centrifugal fan, meaning that the structures of the second heating tube and the first heating tube located on the inner side of the outer edge of the centrifugal fan overlap, and also overlap in the vertical direction.

[0020] 2. Under the premise of increasing the return air temperature, in order to ensure smooth return air, the horizontal projections of the second heating tube and the first heating tube do not overlap within the horizontal projection range of the outer edge of the centrifugal fan. This reduces the area of ​​airflow obstruction on the return air path, thus facilitating smooth return air and improving airflow circulation efficiency.

[0021] 3. To ensure that the return air is effectively reheated, the second heating tube and the first heating tube are arranged vertically at intervals, with the vertical distance between the second heating tube and the first heating tube not exceeding 10mm. This avoids the situation where the distance between the two heating tubes is too large, causing the temperature of the return air to drop significantly before it is reheated, thus failing to achieve an effective reheating effect. It also avoids the situation where the heat cannot be fully dissipated when the two heating tubes are in contact, resulting in low heat utilization, insignificant return air temperature rise, and reduced service life of the heating tubes.

[0022] 4. To improve the heating efficiency inside the cooking cavity and save costs and energy, the two heating elements can operate at different power levels. For example, the power difference between the two heating elements should not be less than 1000W. This can avoid increasing energy consumption by using high power for both heating elements and ensure that the center temperature and hot air temperature inside the cooking cavity are appropriate, thereby improving the cooking effect of the ingredients.

[0023] 5. To simplify the structural configuration, the second heating tube is a single horizontal strip tube, which is simple in structure, easy to process and install. On this basis, in order to improve the heating effect of the food in the central area, the centrifugal fan is symmetrically distributed about the central axis of the second heating tube. The central setting of the second heating tube is conducive to providing a larger radiation range in the radial direction and improving the radiation uniformity. It can also fully heat more return air to improve the temperature of the return air, thereby improving the central temperature and the hot air temperature.

[0024] 6. When the second heating tube is a single horizontally arranged C-shaped heating tube, in order to solve the problem of insufficient heat in the center, the horizontal projection of the second heating tube surrounds the outer side of part of the horizontal projection of the first heating tube, so that the part of the first heating tube located in the center can radiate heat to the central food to compensate for the cold area of ​​the C-shaped heating tube, ensuring that the food is heated evenly, and at the same time it is also beneficial to heat the return air, thereby increasing the temperature of the return air.

[0025] 7. To further increase the temperature of the hot air, the first heating tube is a horizontally arranged multi-turn threaded tube. The horizontal projection of the outer edge of the first heating tube surrounds the outer side of the horizontal projection of the centrifugal fan. After the centrifugal fan throws the hot air circumferentially, the hot air can be reheated by the outer edge of the first heating tube, which can further increase the temperature of the hot air. This ensures that the hot air reaches the surface of the food at a higher temperature, improving the cooking effect of the hot air on the food. In addition, using a multi-turn threaded tube can increase the radial coverage of the heat of the first heating tube, which can improve the uniformity of heating the food.

[0026] 8. To achieve the installation of the first heating element, the air fryer includes a reflector, a pot body, and a first fixing component. The first fixing component includes a clamping part and a fixing part. The clamping part includes multiple slots with spaced lateral openings. Multiple spiral segments of the first heating element are respectively horizontally clamped into the multiple slots. The fixing part is fixed to the reflector. Thus, the first heating element is fixed to the reflector by the first fixing component, which can ensure its installation and use stability. Using multiple slots to clamp multiple spiral segments of the first heating element can ensure the stable spacing between adjacent spiral segments, so as to make the radial heat distribution uniform, thereby improving the uniformity of food heating. At the same time, it is beneficial to keep the first heating element as a whole on the same horizontal plane, preventing local fluctuations or even deformations caused by airflow, which would affect its reliability.

[0027] Furthermore, to improve the stability of the first heating element installation, the fixing part includes a horizontal mounting part protruding upward relative to the clamping part and a vertical mounting part extending downward from the horizontal mounting part. Both the horizontal and vertical mounting parts are provided with screw holes. The horizontal mounting part is fixed to the top wall of the reflector by fasteners, and the vertical mounting part is fixed to the side wall of the reflector by fasteners. Thus, the installation limitation of the horizontal mounting part restricts the axial movement of the first heating element, and the installation limitation of the vertical mounting part restricts the radial movement of the first heating element. This further reduces the fluctuations generated by the first heating element. Under the premise of stable position, it is beneficial to promote the relative position stability of the first and second heating elements, so that they can work together to improve the heating effect in the cooking cavity. The horizontal mounting part is higher than the first heating element, which helps to form a suitable gap between the first heating element and the top wall of the reflector, preventing the first heating element from getting too close to the top wall of the reflector, which would increase the risk of reflector deformation, and prolong the time for heat to reach the surface of the food, thus reducing heating efficiency.

[0028] To achieve the installation of the second heating tube, in one embodiment, the second heating tube is a horizontally extending strip tube, and the inner end of the clamping part is provided with a collar located below the slot. The end of the second heating tube is engaged in the collar. Thus, the first heating tube and the second heating tube can be fixed to the reflector by the same fastener, which can reduce the use of assembly structure, simplify the installation steps, and facilitate the compact design of the structure.

[0029] In another embodiment, the second heating element is a C-shaped heating element, and the air fryer also includes a second fixing component. The second fixing component includes a pipe clamp and an extension arm connected to the pipe clamp. The second heating element is snapped into the pipe clamp, and the extension arm is fixed to the reflector. Thus, the first heating element and the second heating element can be fixed to the reflector by different fixing components, which simplifies the structure of each fixing component, ensures a secure fixation, facilitates the individual disassembly of any heating element, and provides maintenance convenience. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the overall structure of an air fryer according to one embodiment of this application.

[0032] Figure 2 This is a schematic diagram of the composition of the heating element in the first embodiment of this application.

[0033] Figure 3 for Figure 2 A bottom view of the heating element.

[0034] Figure 4 This is a schematic diagram of the structure of the first fastener in one example of this application.

[0035] Figure 5 This is a schematic diagram of the structure of the first fastener in another example of this application.

[0036] Figure 6 This is a schematic diagram of the composition of the heating element in the second embodiment of this application.

[0037] Figure 7 for Figure 6 A bottom view of the heating element.

[0038] Figure label:

[0039] 10. Body; 11. Cooking cavity; 12. Heating element; 13. Centrifugal fan; 14. First heating tube; 141. Spiral section; 15. Second heating tube; 16. Reflector; 17. Pot body; 18. First fixing component; 181. Slot; 182. Horizontal mounting part; 183. Vertical mounting part; 184. Screw hole; 185. Collar; 19. Second fixing component; 191. Pipe clamp; 192. Extension arm. Detailed Implementation

[0040] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0041] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0042] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0043] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through a transitional structure, but are connected solely by a connecting structure to form a whole. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0046] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] like Figures 1 to 7As shown, this application provides an air fryer, including a body 10, a cooking chamber 11 inside the body 10, a heating element 12 and a centrifugal fan 13 disposed at the upper end of the interior of the cooking chamber 11, the heating element 12 including a first heating tube 14 and a second heating tube 15 disposed below the centrifugal fan 13, the second heating tube 15 being disposed below the first heating tube 14, and the horizontal projections of the second heating tube 15 and the first heating tube 14 at least partially overlapping within the horizontal projection range of the outer edge of the centrifugal fan 13.

[0048] This air fryer utilizes a dual-heating-tube system. The two heating tubes are positioned vertically at different heights, with the second heating tube 15 positioned lower than the first heating tube 14. This enhances the radiative heating effect on the central food component. Furthermore, the horizontal projections of the second heating tube 15 and the first heating tube 14 at least partially overlap within the horizontal projection range of the outer edge of the centrifugal fan 13. This ensures that the first heating tube 14 and the second heating tube 15 overlap to some extent in the vertical direction within the suction area of ​​the centrifugal fan 13. On one hand, this allows for radiative heating of the second heating tube 15, addressing the issue of insufficient central temperature. On the other hand, during the upward suction process of the centrifugal fan 13, the return air, after being initially heated by the second heating tube 15, is further heated by the first heating tube 14, thus increasing the return air temperature. This, in turn, raises the temperature of the hot air blown towards the food. Consequently, both the central and peripheral food components within the cooking cavity 11 are fully heated, improving the overall heating uniformity and enhancing the texture of the food.

[0049] The horizontal projections of the second heating tube 15 and the first heating tube 14 at least partially overlap within the horizontal projection range of the outer edge of the centrifugal fan 13. This means that the structures of the second heating tube 15 and the first heating tube 14 located on the inner side of the outer edge of the centrifugal fan 13 overlap, and they also overlap in the vertical direction. Based on the characteristics of the centrifugal fan 13—central air intake and lateral air exhaust—during the air intake process, the return air can be heated sequentially by the second heating tube 15 and the first heating tube 14. Compared to the prior art where the return air can only be heated once, this significantly increases the temperature of the return air. Subsequently, when the centrifugal fan 13 blows air outward, the hot air reaching the surface of the food is at a higher temperature, thus improving the heating effect of the hot air on the food.

[0050] Specifically, in some embodiments, the first heating element 14 and the second heating element 15 can adopt the same structure, and they are completely overlapped in the vertical direction. This method is beneficial for the processing, layout, and installation of the heating elements. In other embodiments, the first heating element 14 and the second heating element 15 can adopt different structures, and they are partially overlapped in the vertical direction. This can improve space utilization and increase the flexibility of structural design. When the first heating element 14 and the second heating element 15 adopt different structures, preferably, the structure of the second heating element 15 is relatively simple, so as to occupy less space in the cooking cavity 11, and so that there is more space below the second heating element 15 to accommodate more food.

[0051] In a preferred embodiment, the horizontal projections of the second heating tube 15 and the first heating tube 14 do not partially overlap within the horizontal projection range of the outer edge of the centrifugal fan 13.

[0052] Preferred, such as Figure 2 or Figure 6 As shown, the first heating element 14 and the second heating element 15 adopt different structural shapes. When the centrifugal fan 13 draws air in, the non-overlapping positions of the first heating element 14 and the second heating element 15 reduce obstruction of the return air, which is beneficial for smooth return airflow and improves airflow circulation efficiency. It can be understood that in the return air area of ​​the centrifugal fan 13, some airflow is heated only by the second heating element 15, some airflow is heated only by the first heating element 14, and some airflow is heated sequentially by the second heating element 15 and the first heating element 14. The average temperature of the return air is higher than that of conventional return air, thus improving the hot air temperature acting on the food.

[0053] In a preferred embodiment, the second heating tube 15 and the first heating tube 14 are arranged at intervals in the vertical direction, and the vertical distance between the second heating tube 15 and the first heating tube 14 does not exceed 10mm.

[0054] By setting the appropriate spacing between the two heating elements, it is possible to avoid the situation where the distance between the two heating elements is too large, causing the temperature of the return air to drop significantly before it has been reheated, thus failing to achieve an effective secondary heating effect. It is also possible to avoid the situation where the heat cannot be fully dissipated when the two heating elements are in contact, resulting in low heat utilization, insignificant return air temperature rise, and reduced service life of the heating elements.

[0055] As a preferred embodiment, the power difference between the second heating tube 15 and the first heating tube 14 is not less than 1000W. This avoids increasing energy consumption by using high power for both heating tubes and ensures that the center temperature and hot air temperature inside the cooking cavity 11 are suitable, thereby improving the cooking effect of the food.

[0056] like Figure 2 or Figure 6As shown, the first heating element 14 and the second heating element 15 adopt different structural forms. In some embodiments, the power of the second heating element 15 is greater than that of the first heating element 14, which can enhance the radiation effect of the second heating element 15 on the central food. In other embodiments, the power of the second heating element 15 is less than that of the first heating element 14, and the first heating element 14 has a larger radiation range than the second heating element 15. Setting the higher power of the first heating element 14 is beneficial to increasing the central temperature and hot air temperature, thereby improving the heating efficiency within the cooking cavity 11.

[0057] Furthermore, the first heating element 14 and the second heating element 15 can be independently controlled by the control unit, and the two work simultaneously for at least part of the time during food processing, so as to improve the center temperature and hot air temperature by working simultaneously.

[0058] In a preferred embodiment, the second heating tube 15 is a single horizontally arranged strip tube, and the centrifugal fan 13 is symmetrically distributed about the central axis of the second heating tube 15.

[0059] like Figure 2 and Figure 3 As shown, the second heating tube 15 adopts a strip tube, which has a simple structure and is easy to process and install. The centering of the second heating tube 15 is conducive to providing a larger radiation range in the radial direction and improving radiation uniformity. It can also fully heat more return air to improve the temperature of the return air, thereby improving the center temperature and hot air temperature.

[0060] Furthermore, in this embodiment, the first heating tube 14 is a horizontally arranged multi-turn threaded tube, and in the region inside the outer edge of the centrifugal fan 13, the portions of the first heating tube 14 and the second heating tube 15 facing each other overlap in the vertical direction.

[0061] In a preferred embodiment, the second heating tube 15 is a single C-shaped heating tube arranged horizontally, and the horizontal projection of the second heating tube 15 surrounds the outer side of a portion of the horizontal projection of the first heating tube 14.

[0062] like Figure 6 and Figure 7 As shown, the portion of the first heating tube 14 located in the center can radiate heat to the central food to compensate for the cold area of ​​the C-shaped heating tube, ensuring that the food is heated evenly. At the same time, it is also beneficial to heat the return air, thereby increasing the temperature of the return air.

[0063] Furthermore, in this embodiment, the first heating tube 14 is a horizontally arranged multi-turn threaded tube, and in the region inside the outer edge of the centrifugal fan 13, the portions of the first heating tube 14 and the second heating tube 15 facing each other overlap in the vertical direction.

[0064] In a preferred embodiment, the first heating tube 14 is a horizontally arranged multi-turn threaded tube, and the horizontal projection of the outer edge of the first heating tube 14 surrounds the outer side of the horizontal projection of the centrifugal fan 13.

[0065] Specifically, the first heating element 14 employs a multi-turn threaded tube, which increases the radial coverage of its heat and improves the uniformity of food heating. For example, the multi-turn threaded tube can be formed by gradually spiraling inwards from one end of the heating element to the center and then gradually spiraling outwards. The outer diameter of the maximum circumference of the first heating element 14 is larger than the outer diameter of the centrifugal fan 13, meaning the outer edge of the first heating element 14 is radially outside the outer edge of the centrifugal fan 13. Therefore, after the centrifugal fan 13 circumferentially ejects hot air, the hot air can be reheated by passing through the outer edge of the first heating element 14, further increasing the temperature of the hot air. This ensures that the hot air reaches a higher temperature when it reaches the surface of the food, improving the cooking effect of the hot air.

[0066] In a preferred embodiment, the first heating tube 14 is a horizontally arranged multi-turn threaded tube. The air fryer includes a reflector 16, a pot body 17, and a first fixing member 18. The reflector 16 and the pot body 17 enclose a cooking cavity 11. The first fixing member 18 includes a clamping part and a fixing part. The clamping part includes multiple slots 181 with spaced lateral openings. Multiple spiral segments 141 of the first heating tube 14 are respectively horizontally clamped into the multiple slots 181. The fixing part is fixed to the reflector 16.

[0067] like Figure 1 , Figure 2 or Figure 6 As shown, the first heating tube 14 is fixed to the reflector 16 by the first fixing member 18, which can ensure the stability of its installation and use. Multiple slots 181 are used to clamp multiple spiral segments 141 of the first heating tube 14, which can ensure the stable spacing between adjacent spiral segments 141, so as to make the radial heat distribution uniform, thereby improving the uniformity of food heating. At the same time, it is beneficial to keep the first heating tube 14 as a whole on the same horizontal plane, preventing local fluctuations or even deformations caused by airflow, which would affect its reliability.

[0068] In a preferred embodiment, the fixing part includes a horizontal mounting part 182 that protrudes upward relative to the clamping part and a vertical mounting part 183 that extends downward from the horizontal mounting part 182. Both the horizontal mounting part 182 and the vertical mounting part 183 are provided with screw holes 184. The horizontal mounting part 182 is fixed to the top wall of the reflector 16 by fasteners, and the vertical mounting part 183 is fixed to the side wall of the reflector 16 by fasteners.

[0069] like Figure 2As shown, the horizontal mounting portion 182 limits the axial movement of the first heating tube 14, and the vertical mounting portion 183 limits its radial movement. This further reduces fluctuations in the first heating tube 14, and, with its position stable, promotes relative stability between the first heating tube 14 and the second heating tube 15, allowing them to work together to improve the heating effect within the cooking cavity 11. The horizontal mounting portion 182 is higher than the first heating tube 14, which helps create a suitable gap between the first heating tube 14 and the top wall of the reflector 16. This prevents the first heating tube 14 from getting too close to the top wall of the reflector 16, increasing the risk of deformation of the reflector 16, and prolonging the time it takes for heat to reach the food surface, thus reducing heating efficiency.

[0070] In one embodiment, the second heating tube 15 is a horizontally extending strip tube, and the inner end of the clamping part is provided with a collar 185 located below the slot 181, and the end of the second heating tube 15 is engaged in the collar 185. Figure 2 and Figure 3 As shown, the first heating tube 14 and the second heating tube 15 can be fixed to the reflector 16 by the same fastener, which reduces the use of assembly structures, simplifies installation steps, and facilitates a compact design. Furthermore, in this embodiment, the first heating tube 14 and the second heating tube 15 can be formed as an integral structural component by the first fastener 18, which can be used as a module, making installation more convenient. In this embodiment, there are two first fasteners 18, which can respectively limit the two ends of the second heating tube 15; the number of slots 181 of the first fastener 18 can be flexibly set according to the distribution of the spiral segments 141 of the first heating tube 14, such as... Figures 2 to 5 As shown, one of the first fixing members 18 has three slots 181 (the slots 181 used to engage the same spiral segment 141 are referred to as one slot 181), and the other first fixing member 18 has one slot 181. The two first fixing members 18 respectively limit the first heating tube 14 on both sides along the horizontal direction.

[0071] In another embodiment, the second heating element 15 is a C-shaped heating element, and the air fryer also includes a second fixing member 19, which includes a pipe clamp 191 and an extension arm 192 connected to the pipe clamp 191. The second heating element 15 is snapped into the pipe clamp 191, and the extension arm 192 is fixed to the reflector 16. Figure 6 and Figure 7As shown, the first heating element 14 and the second heating element 15 can be fixed to the reflector 16 using different fasteners. This simplifies the structure of each fastener, ensures a secure fixation, and facilitates individual disassembly of any heating element, providing convenient maintenance. The end of the extension arm 192 may have a mounting portion, which can be a screw hole or a snap-fit ​​structure, allowing the extension arm 192 to be fixed to the reflector 16 by screws or snap-fit ​​connections. In this embodiment, for example, three second fasteners 19 are provided, evenly spaced along the circumferential direction of the second heating element 15, enhancing the stability of the second heating element 15 installation. Furthermore, in this embodiment, the first heating element 14 and the second heating element 15 can be relatively distributed solely by their respective fasteners, or a separate connection structure can be provided between them to ensure reliable relative distribution; this is not limited here.

[0072] The technical solutions protected by this utility model are not limited to the above embodiments. It should be noted that any combination of the technical solutions of any embodiment with one or more other embodiments is within the protection scope of this utility model. Although this utility model has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. An air fryer, comprising a machine body, a cooking cavity being provided in the machine body, a heating element and a centrifugal fan being provided at an upper end inside the cooking cavity, characterized in that, the heating element comprises a first heating pipe and a second heating pipe being provided below the centrifugal fan, the second heating pipe being provided below the first heating pipe, a horizontal projection of the second heating pipe and the first heating pipe at least partially coincides within a horizontal projection range of an outer edge of the centrifugal fan.

2. The air fryer according to claim 1, characterized in that, a horizontal projection of the second heating pipe and the first heating pipe partially does not coincide within the horizontal projection range of the outer edge of the centrifugal fan.

3. The air fryer according to claim 1, characterized in that, the second heating pipe and the first heating pipe are spaced apart in a vertical direction, a vertical distance between the second heating pipe and the first heating pipe is not more than 10 mm.

4. The air fryer according to claim 1, characterized in that, a difference between a power of the second heating pipe and a power of the first heating pipe is not less than 1000 W.

5. The air fryer according to claim 1, characterized in that, the second heating pipe is a single horizontal strip-shaped pipe, the centrifugal fan is symmetrically distributed about a central axis of the second heating pipe.

6. The air fryer according to claim 1, characterized in that, the second heating pipe is a single horizontal C-shaped heating pipe, a horizontal projection of the second heating pipe encloses an outer side of a horizontal projection of part of the first heating pipe.

7. The air fryer according to claim 1, characterized in that, the first heating pipe is a horizontal multi-turn thread pipe, a horizontal projection of an outer edge of the first heating pipe encloses an outer side of a horizontal projection of the centrifugal fan.

8. The air fryer according to claim 1, characterized in that, the first heating pipe is a horizontal multi-turn thread pipe, the air fryer comprises a reflector, a pot body and a first fixing element, the reflector and the pot body enclose the cooking cavity, the first fixing element comprises a clamping portion and a fixing portion, the clamping portion comprises a plurality of spaced apart lateral open clamping grooves, a plurality of spiral segments of the first heating pipe are respectively laterally clamped in the plurality of clamping grooves, the fixing portion is fixed to the reflector.

9. The air fryer according to claim 8, characterized in that, the fixing portion comprises a horizontal mounting portion being convex relative to the clamping portion and a vertical mounting portion being downwardly extended from the horizontal mounting portion, the horizontal mounting portion and the vertical mounting portion are both provided with screw holes, the horizontal mounting portion is fixed to a top wall of the reflector by fasteners, the vertical mounting portion is fixed to a side wall of the reflector by fasteners.

10. The air fryer according to claim 8, characterized in that, the second heating pipe is a horizontal strip-shaped pipe, an inner end of the clamping portion is provided with a sleeve ring being below the clamping grooves, an end portion of the second heating pipe is clamped in the sleeve ring. Alternatively, the second heating tube is a C-shaped heating tube, and the air fryer further comprises a second fixing member, the second fixing member comprising a tube clamp and an extension arm connected to the tube clamp, the second heating tube being clamped in the tube clamp, and the extension arm being fixed to the reflecting cover.

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