Air fryer

Abstract

The air fryer comprises a machine shell and a fryer assembly, the machine shell is provided with an assembly cavity with a lateral opening, the fryer assembly enters and exits the assembly cavity through the opening, a metal bottom plate is arranged at the bottom of the assembly cavity, a base is arranged at the bottom of the machine shell, a mounting cavity is defined by the bottom plate and the base, a PTC heating piece is arranged in the mounting cavity, and a fixing frame is arranged in the mounting cavity. The fixing frame comprises a middle containing groove for containing the PTC heating piece and two elastic connecting parts connected to the two sides of the containing groove, the edge of the bottom plate extends out of the assembling cavity, a first through hole is formed in the position, outside the assembling cavity, of the bottom plate, and second through holes are formed in the outer ends of the connecting parts. The fastening piece penetrates through the first through hole and the second through hole to fix the fixing frame to the bottom plate so that the PTC heating piece can be clamped and attached to the bottom plate, and the connecting part compensates for the tolerance between the first through hole and the second through hole through elastic deformation. The elastic connecting part is adopted, normal assembly of the fixing frame and the bottom plate can be guaranteed, waste of the fixing frame can be prevented, and the utilization rate of the fixing frame is improved.

Description

Technical Field

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

[0002] Current air fryers typically incorporate a separate lower heating element to improve cooking efficiency and even heating of food. This lower heating element works in conjunction with the hot air assembly of the burner. One type of lower heating element is fixed to the lower surface of the metal base plate of the assembly cavity with screws. These screws protrude from the outer surface of the metal base plate, making them visible when the user removes the fryer, which affects both aesthetics and user experience.

[0003] Among related technologies, patent number CN201821979354.5 discloses a heating device in which a PTC heating element is placed in the installation space between a metal plate and a base. The PTC heating element is pressed against the bottom surface of the metal plate by a pressure strip. The pressure strip is installed by inserting into the insert strip at the edge of the metal plate through the insertion hole on it, avoiding the use of exposed screws and improving the aesthetics of the device. However, the insertion holes at both ends of the pressure strip along its length need to be aligned with the corresponding insert strip to ensure effective installation between the pressure strip and the metal plate. Mechanical structures usually have tolerances during processing. If the tolerance is too large, it will be difficult to meet the assembly requirements of the pressure strip and the metal plate. In order to control the tolerance, the processing accuracy needs to be improved, which will lead to increased costs. Utility Model Content

[0004] This utility model provides an air fryer, which aims to solve the technical problem that the existing pressure strip used to fix the PTC heating element is prone to large tolerances between the metal plate and the plate, which affects normal assembly, resulting in low utilization of the pressure strip, easy waste and increased cost.

[0005] This utility model discloses an air fryer, including a housing and an air fryer assembly. The housing has a side-opening assembly cavity, through which the air fryer assembly enters and exits the assembly cavity. The bottom of the assembly cavity is provided with a metal base plate, and the bottom of the housing is provided with a base. The base plate and the base enclose an installation cavity, in which a PTC heating element is provided. A fixing frame is provided in the installation cavity. The fixing frame includes a central receiving groove for accommodating the PTC heating element and two elastic connecting parts connecting the two sides of the receiving groove. The edge of the base plate extends outside the assembly cavity, and the base plate has a first through hole outside the assembly cavity. The outer end of the connecting parts has a second through hole. Fasteners pass through the first through hole and the second through hole to fix the fixing frame to the base plate to clamp the PTC heating element to the base plate.

[0006] The air fryer of this utility model also has the following additional technical features:

[0007] The connecting part is an arc-shaped cantilever, and the middle part of the arc-shaped cantilever is recessed.

[0008] The connecting part is a wave-shaped cantilever, which includes multiple protrusions and multiple concave parts, and the multiple protrusions and multiple concave parts are connected alternately in sequence.

[0009] The length of the connecting part is less than the length of the receiving groove.

[0010] The bottom of the PTC heating element is provided with a downwardly protruding positioning post, and the receiving groove is provided with a positioning hole corresponding to the positioning post.

[0011] The positioning posts are provided in two places, respectively located on both sides of the center of the PTC heating element along the length direction.

[0012] The receiving groove is box-shaped and wraps around the PTC heating element circumferentially.

[0013] The bottom of the sidewall of the assembly cavity is folded outward to form a flange. The flange is provided with a mounting hole corresponding to the first through hole. The fastener passes through the mounting hole, the first through hole and the second through hole to fix the base plate, the fixing frame and the sidewall of the assembly cavity.

[0014] The connecting part is integrally formed with the receiving groove; or, the connecting part is hinged to the side wall of the receiving groove.

[0015] An air isolation layer is provided between the fixing frame and the base.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects:

[0017] 1. To prevent screws from being directly inserted into the surface of the assembly cavity bottom plate, which would affect the machine's aesthetics, the air fryer of this application places the holes for fasteners outside the assembly cavity. This ensures the PTC heating element is fixed while preventing the fasteners from being exposed, thus solving the aesthetic problem. Furthermore, to improve the reliability of PTC heating element installation, the mounting bracket for clamping the PTC heating element is equipped with an elastic connecting part. The connecting part can compensate for the tolerances of the corresponding hole structures of the mounting bracket and the bottom plate through elastic deformation. This ensures the normal assembly requirements of the mounting bracket and the bottom plate, prevents the mounting bracket from being discarded and wasted, improves its utilization rate, and saves costs.

[0018] 2. To simplify the structure of the mounting bracket while ensuring effective installation of the PTC heating element, the connecting part can adopt an arc-shaped cantilever. The middle of the arc-shaped cantilever is recessed. On the one hand, the arc-shaped cantilever ensures that the connecting part has a certain amount of tension, which is conducive to the alignment of the second through hole with the first through hole. Moreover, the recessed design of the arc-shaped cantilever can prevent interference with the base plate during installation, which is conducive to a smooth installation process. On the other hand, the arc-shaped cantilever has no sharp edges, and the stress distribution is relatively uniform. It has better performance when bearing axial force and torque. After the arc-shaped cantilever at both ends is fixed, it is subjected to compressive deformation force. This deformation force presses the PTC heating element tightly against the hardware base plate, which can realize the PTC heating element is stably attached to the base plate, improve the heat conduction effect, reduce heat loss, and enhance the heating effect of the bottom heating structure on food.

[0019] 3. To improve the performance and lifespan of the mounting bracket, a wave-shaped cantilever can be used for the connection. The wave-shaped cantilever includes multiple protrusions and multiple concave parts, which are connected alternately in sequence. The wave-shaped cantilever can better disperse stress and reduce localized stress concentration. After the wave-shaped cantilever at both ends is subjected to the load of fasteners, the wave-shaped contour can transmit and disperse the force along the curve, reducing the risk of damage to the mounting bracket. At the same time, the wave-shaped structure increases the overall rigidity of the mounting bracket. Due to the undulation of the waves, the structure has a certain degree of bending and torsional resistance in all directions. This increase in rigidity allows the cantilever structure to withstand greater loads and is less prone to deformation during the use of it to fix the PTC heating element, ensuring the safety and stability of the overall structure.

[0020] 4. In order to ensure that the PTC heating element is always in close contact with the base plate and thus ensure the heating effect, the length of the connecting part is less than the length of the receiving groove. This can avoid the connecting part being too long and unable to provide sufficient support to the receiving groove so that the receiving groove can press the PTC heating element tightly against the base plate. If a gap is formed between the PTC heating element and the base plate, it will inevitably lengthen the heat conduction path and reduce the heating efficiency, and will also cause some heat loss.

[0021] 5. To achieve rapid positioning of the PTC heating element and improve installation efficiency, the bottom of the PTC heating element is provided with a downwardly protruding positioning post, and the receiving groove is provided with a positioning hole corresponding to the positioning post. By cooperating with the positioning post and the positioning hole, the relative position of the PTC heating element and the fixing frame can be determined, which is conducive to quickly aligning the second through hole of the connecting part with the first through hole, thereby improving installation efficiency.

[0022] Furthermore, there are two positioning posts, which are respectively set on both sides of the center of the PTC heating element along the length direction. This ensures that the length direction of the fixing frame and the PTC heating element are parallel, so that the receiving groove stably supports the PTC heating element and ensures that the PTC heating element is evenly attached to the bottom plate. This allows the heat of the PTC heating element to be evenly transferred to the pot body, so that the bottom of the food is heated evenly.

[0023] 6. To improve the clamping effect of the mounting bracket on the PTC heating element, the receiving groove is box-shaped and wraps around the PTC heating element circumferentially. By increasing the contact area between the receiving groove and the PTC heating element, it is beneficial to ensure that the PTC heating element is evenly attached to the base plate, and to facilitate even heat transfer from the PTC heating element to the cooking cavity, thereby improving the cooking effect on the bottom surface of the food. At the same time, the full-enclosure structure of the receiving groove can effectively reduce the heat transfer from the PTC heating element to the base, thereby reducing the temperature rise of the base, preventing thermal deformation, and extending its service life.

[0024] 7. To simplify the installation of structural components, the bottom of the sidewall of the assembly cavity is folded outward to form a flange. The flange has a mounting hole corresponding to the first through hole. The fastener passes through the mounting hole, the first through hole, and the second through hole to fix the base plate, the fixing frame, and the sidewall of the assembly cavity. Thus, the base plate, the fixing frame, and the sidewall of the assembly cavity are connected by the same fastener, reducing the use of accessories and simplifying the installation steps. At the same time, the fastener is hidden on the non-visible surface, which improves the aesthetics.

[0025] 8. In order to reduce the heat transfer of the PTC heating element to the base, prevent the base from thermally deforming, and extend its service life, an air isolation layer is provided between the fixing frame and the base. This air isolation layer can dissipate the heat transferred downwards, thereby reducing the heat reaching the base and effectively lowering the temperature of the base. Attached Figure Description

[0026] 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:

[0027] Figure 1 This is a schematic internal cross-sectional view of an air fryer according to one embodiment of this application.

[0028] Figure 2 This is an exploded view of the assembly structure of the PTC heating element and base plate according to one embodiment of this application.

[0029] Figure 3 for Figure 2 A schematic diagram showing the PTC heating element after it has been installed.

[0030] Figure 4 for Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0031] Figure 5 This is a schematic diagram of the structure of the fixing frame according to one embodiment of this application.

[0032] Figure 6 This is an exploded view of the assembly structure of the PTC heating element and base plate, etc., according to another embodiment of this application.

[0033] Figure label:

[0034] 10. Housing; 101. Hot air assembly; 11. Fryer assembly; 12. Base plate; 121. First through hole; 13. Base; 14. Mounting cavity; 15. PTC heating element; 151. Positioning post; 16. Fixing bracket; 161. Receiving groove; 162. Arc-shaped cantilever; 1621. Extension; 163. Wave-shaped cantilever; 1631. Protrusion; 1632. Recess; 164. Second through hole; 165. Positioning hole; 17. Enclosure; 171. Flanged edge; 172. Mounting hole; 18. Air isolation layer. Detailed Implementation

[0035] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] like Figures 1 to 6 As shown, this application provides an air fryer, including a housing 10 and an air fryer assembly 11. The housing 10 has a side-opening assembly cavity. The air fryer assembly 11 enters and exits the assembly cavity through the opening. A metal base plate 12 is provided at the bottom of the assembly cavity. A base 13 is provided at the bottom of the housing 10. The base plate 12 and the base 13 enclose a mounting cavity 14. A PTC heating element 15 is provided inside the mounting cavity 14.

[0043] In conventional air fryers, screw holes are usually pre-drilled at the four directional corners of the PTC component, which is then secured to the metal base plate of the assembly cavity by screws or rivets. This design results in foreign objects such as screws on the surface of the base plate. When the air fryer component is removed, the user can see the exposed screws, which affects the appearance of the machine. Furthermore, the assembly process is complex and can easily lead to poor consistency in the installation of the PTC component, affecting the overall quality of the machine.

[0044] The air fryer of this application has a mounting cavity 14 with a fixing frame 16. The fixing frame 16 includes a central receiving groove 161 for accommodating a PTC heating element 15 and two elastic connecting parts connected to both sides of the receiving groove 161. The edge of the bottom plate 12 extends to the outside of the mounting cavity. The bottom plate 12 has a first through hole 121 outside the mounting cavity. The outer end of the connecting part has a second through hole 164. Fasteners pass through the first through hole 121 and the second through hole 164 to fix the fixing frame 16 to the bottom plate 12 so as to clamp the PTC heating element 15 to the bottom plate 12. The connecting part compensates for the tolerance between the first through hole 121 and the second through hole 164 through elastic deformation.

[0045] To prevent screws from being directly inserted into the surface of the assembly cavity base plate 12, affecting the machine's aesthetics, the air fryer of this application places the holes for fasteners outside the assembly cavity. This ensures the PTC heating element 15 is securely fixed while preventing exposed fasteners, thus solving the aesthetic problem and not affecting the appearance of the metal base plate 12, enabling traceless installation. Furthermore, to improve the reliability of the PTC heating element 15 installation, the mounting bracket 16 for clamping the PTC heating element 15 is provided with an elastic connecting part. This connecting part can compensate for the tolerances of the corresponding hole structures of the mounting bracket 16 and the base plate 12 through elastic deformation. This ensures the normal assembly requirements of the mounting bracket 16 and the base plate 12, prevents the mounting bracket 16 from being discarded and wasted, improves its utilization rate, and saves costs.

[0046] Specifically, the PTC heating element 15 is effectively fixed to the base plate 12 under the pressing action of the mounting bracket 16. The heat generated by it is transferred to the cooking cavity through the base plate 12, which can improve the heating effect on the lower side of the food. By setting the receiving groove 161, the PTC heating element 15 can be quickly placed on the mounting bracket 16 during the assembly process. The elastic connecting parts on both sides of the receiving groove 161 have a certain amount of elastic deformation, providing good adaptability and flexibility. It can adapt to the assembly requirements of large tolerance deviations of hardware parts, such as some hardware base plate 12 plane deformation or screw hole spacing too large. The easy deformation of the elastic connecting parts can be used to adjust the fit, which is beneficial to the assembly of PTC heating element 15 and the assembly of the whole machine. The easy installation and disassembly features of the mounting bracket 16 make the installation of PTC heating element 15 quick to adjust and expand, thereby improving the flexibility of PTC heating element 15 specifications and installation efficiency.

[0047] The connecting part and the receiving groove 161 can be integrally formed, such as Figure 2 or Figure 5As shown, the connecting part extends outward from the side wall of the receiving groove 161. The connecting part and the receiving groove 161 form an integral part, which helps to improve the overall structural strength and allows more force to be transferred to the receiving groove 161 after the connecting part is fixed, thereby ensuring the supporting effect of the receiving groove 161 on the PTC heating element 15. Alternatively, the connecting part and the receiving groove 161 can be set separately, with the connecting part hinged to the side wall of the receiving groove 161. The separate setting makes it easier to process and the dimensions are easier to control, increasing the flexibility of the processing of the fixing bracket 16.

[0048] It is understandable that, such as Figure 1 As shown, a hot air assembly 101 is provided above the air fryer assembly 11 in the assembly cavity. When the air fryer is working, the hot air assembly 101 and the PTC heating element 15 work together to heat the food in the air fryer, which can improve heating efficiency, enhance the uniformity of food heating, and improve the taste of food.

[0049] To increase the flexibility of the mounting bracket 16 in processing and use, the connecting part can be configured in different forms. In one embodiment, the connecting part is an arc-shaped cantilever 162, with the middle part of the arc-shaped cantilever 162 recessed.

[0050] like Figure 2 , Figure 3 and Figure 6 As shown, on the one hand, the connecting part adopts an arc-shaped cantilever 162 to ensure that the connecting part has a certain amount of tension, which is conducive to the alignment of the second through hole 164 with the first through hole 121. Moreover, the arc-shaped cantilever 162 is recessed to prevent interference with the base plate 12 during installation, which is conducive to a smooth installation process. On the other hand, the arc-shaped cantilever 162 has no sharp edges, and the stress distribution is relatively uniform. It has good performance when bearing axial force and torque. After the arc-shaped cantilever 162 at both ends is fixed, it is subjected to compressive deformation force. This deformation force presses the PTC heating element 15 tightly against the hardware base plate 12, which can realize that the PTC heating element 15 is stably attached to the base plate 12, which can improve the heat conduction effect, reduce heat loss, and improve the heating effect of the bottom heating structure on food.

[0051] It is understandable that, such as Figure 3 As shown, the concave setting of the arc-shaped cantilever 162 means that the center of the arc is located above the arc. Of course, in other embodiments, the arc-shaped cantilever 162 can also be concave (i.e., the center of the arc is located below the arc), and the degree of concavity can be set to be smaller to avoid interference between the arc-shaped cantilever 162 and the base plate 12 during installation.

[0052] exist Figure 2 In the example, the outer end of the arc-shaped cantilever 162 is provided with a horizontal extension 1621, and a second through hole 164 is provided on the extension 1621.

[0053] In another embodiment, the connecting part is a wave-shaped cantilever 163, which includes a plurality of protrusions 1631 and a plurality of recesses 1632, which are connected alternately in sequence.

[0054] like Figure 5 As shown, the use of a wave-shaped cantilever 163 can better disperse stress and reduce localized stress concentration. When the wave-shaped cantilever 163 at both ends is subjected to the load of fasteners, the wave-shaped contour can transmit and disperse the force along the curve, reducing the risk of damage to the fixing frame 16. Simultaneously, this wave-shaped structure increases the overall stiffness of the fixing frame 16. Due to the undulation of the waves, the structure has a certain degree of bending and torsional resistance in all directions. This increased stiffness allows the cantilever structure to withstand greater loads and is less prone to deformation during the fixing of the PTC heating element 15, ensuring the safety and stability of the overall structure. Preferably, the outer end of the wave-shaped cantilever 163 is a protrusion 1631, and the second through hole 164 is provided on the protrusion 1631.

[0055] In order to ensure that the clamping force is effectively transmitted to the middle structure of the fixing frame 16 after the cantilever is fixed, the wall thickness of the cantilever can be set to not less than 0.8mm. This setting can ensure that the cantilever at both ends can provide sufficient elastic deformation force to fasten the PTC heating element 15 after being clamped.

[0056] To avoid the connecting part being too long and unable to provide sufficient support to the receiving groove 161 to press the PTC heating element 15 tightly against the base plate 12, in a preferred embodiment, the length of the connecting part is less than the length of the receiving groove 161. This way, after the two connecting parts are fixed, the receiving groove 161 can be pulled taut to both sides, causing the receiving groove 161 to press the PTC heating element 15 against the base plate 12. This avoids the formation of a gap between the PTC heating element 15 and the base plate 12, which would lengthen the heat conduction path and reduce heating efficiency, thus preventing some heat loss.

[0057] In a preferred embodiment, the bottom of the PTC heating element 15 is provided with a downwardly protruding positioning post 151, and the receiving groove 161 is provided with a positioning hole 165 corresponding to the positioning post 151.

[0058] like Figure 2 or Figure 3 As shown, in this embodiment, the fixing bracket 16 is strip-shaped. The relative position of the PTC heating element 15 and the fixing bracket 16 can be determined by the cooperation of the positioning post 151 and the positioning hole 165. This facilitates the quick alignment of the second through hole 164 of the connecting part with the first through hole 121, thereby improving the installation efficiency. Since the contact area between the receiving groove 161 and the PTC heating element 15 is small, mutual limiting can prevent the PTC heating element 15 from moving back and forth after placement, thereby improving the installation stability and reliability.

[0059] In a preferred embodiment, there are two positioning posts 151, which are respectively located on both sides of the center of the PTC heating element 15 along the length direction.

[0060] like Figure 2 As shown, the PTC heating element 15 has a relatively long length. If only one positioning post 151 is used, the receiving groove 161 is prone to skewing, which is not conducive to the rapid alignment of the second through hole 164 and the first through hole 121. By using two positioning posts 151 evenly distributed along the length direction of the PTC heating element 15, it is possible to ensure that the length directions of the fixing frame 16 and the PTC heating element 15 are parallel, so that the receiving groove 161 stably supports the PTC heating element 15 and ensures that the PTC heating element 15 is evenly attached to the bottom plate 12. This allows the heat from the PTC heating element 15 to be evenly transferred to the pot body, making the bottom of the food evenly heated. Of course, it is understandable that the number of positioning posts 151 can also be set to more than two to enhance the positioning effect.

[0061] In a preferred embodiment, the receiving groove 161 is box-shaped, and the receiving groove 161 wraps the PTC heating element 15 in the circumferential direction.

[0062] like Figure 6 As shown, by increasing the contact area between the receiving groove 161 and the PTC heating element 15, it is beneficial to make the PTC heating element 15 evenly attached to the base plate 12, which is beneficial to the uniform heat transfer of the PTC heating element 15 to the cooking cavity and improve the cooking effect of the bottom surface of the food. At the same time, the full-enclosure structure of the receiving groove 161 can effectively reduce the heat transfer of the PTC heating element 15 to the base 13, which can reduce the temperature rise of the base 13, prevent it from thermal deformation, and extend its service life.

[0063] In this embodiment, the PTC heating element 15 is circumferentially surrounded by the receiving groove 161, eliminating the need for a positioning structure between them. This simplifies the structural configuration and improves the versatility of the PTC heating element 15. The width of the connecting part (in this embodiment, for example, an arc-shaped cantilever 162) can be adjusted according to the required structure, and is generally designed to be no less than 10 mm and no greater than the width of the receiving groove 161.

[0064] To address the issue of odors generated during air fryer operation, the assembly cavity can be made of metal and is typically assembled from several components. For example, the assembly cavity of this application includes a base plate 12 and a surrounding plate 17 located above the base plate 12. The surrounding plate 17 forms the sidewall of the assembly cavity. Both the base plate 12 and the surrounding plate 17 can be metal parts, avoiding the odor generated when plastic parts are exposed to high temperatures. The base plate 12 and the surrounding plate 17 can be securely fastened together with fasteners.

[0065] In a preferred embodiment, the bottom of the sidewall of the assembly cavity is folded outward to form a flange 171. The flange 171 is provided with a mounting hole 172 corresponding to the first through hole 121. Fasteners pass through the mounting hole 172, the first through hole 121 and the second through hole 164 to fix the base plate 12, the fixing frame 16 and the sidewall of the assembly cavity.

[0066] like Figure 4 As shown, the base plate 12, the fixing bracket 16, and the surrounding plate 17 are connected by the same fastener. Compared with the method of fixing the base plate 12 and the fixing bracket 16, and fixing the base plate 12 and the surrounding plate 17 separately, the use of accessories is reduced, the installation steps are simplified, and the fastener is hidden in the non-visible surface, which can improve the aesthetics.

[0067] In a preferred embodiment, an air isolation layer 18 is provided between the fixing frame 16 and the base 13.

[0068] like Figure 3 As shown, the air isolation layer 18 can dissipate the heat transferred downwards, thereby reducing the heat reaching the base 13, effectively lowering the temperature of the base 13, preventing thermal deformation of the base 13, and extending its service life.

[0069] 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 housing and a fryer assembly, the housing having a side-opening assembly cavity, the fryer assembly entering and exiting the assembly cavity through the opening, a metal base plate at the bottom of the assembly cavity, a base at the bottom of the housing, the base plate and the base forming a mounting cavity, a PTC heating element being disposed within the mounting cavity, characterized in that, The mounting cavity is provided with a fixing frame, which includes a central receiving groove for accommodating the PTC heating element and two elastic connecting parts connected to both sides of the receiving groove. The edge of the base plate extends to the outside of the mounting cavity. The base plate is provided with a first through hole outside the mounting cavity, and the outer end of the connecting part is provided with a second through hole. Fasteners pass through the first through hole and the second through hole to fix the fixing frame to the base plate so as to clamp the PTC heating element to the base plate.

2. An air fryer according to claim 1, characterized in that, The connecting part is an arc-shaped cantilever, and the middle part of the arc-shaped cantilever is recessed.

3. An air fryer according to claim 1, characterized in that, The connecting part is a wave-shaped cantilever, which includes multiple protrusions and multiple concave parts, and the multiple protrusions and multiple concave parts are connected alternately in sequence.

4. An air fryer according to claim 1, characterized in that, The length of the connecting part is less than the length of the receiving groove.

5. An air fryer according to claim 1, characterized in that, The bottom of the PTC heating element is provided with a downwardly protruding positioning post, and the receiving groove is provided with a positioning hole corresponding to the positioning post.

6. An air fryer according to claim 5, characterized in that, The positioning posts are provided in two places, respectively located on both sides of the center of the PTC heating element along the length direction.

7. An air fryer according to claim 1, characterized in that, The receiving groove is box-shaped and wraps around the PTC heating element circumferentially.

8. An air fryer according to claim 1, characterized in that, The bottom of the sidewall of the assembly cavity is folded outward to form a flange. The flange is provided with a mounting hole corresponding to the first through hole. The fastener passes through the mounting hole, the first through hole and the second through hole to fix the base plate, the fixing frame and the sidewall of the assembly cavity.

9. An air fryer according to claim 1, characterized in that, The connecting part is integrally formed with the receiving groove; Alternatively, the connecting portion is hinged to the side wall of the receiving groove.

10. An air fryer according to claim 1, characterized in that, An air isolation layer is provided between the fixing frame and the base.

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