Air fryer reliable in temperature sensing

Abstract

The utility model discloses a reliable temperature sensing air fryer which comprises a machine body provided with an assembly cavity and a fryer assembly installed in the assembly cavity in a drawable mode, a heating assembly is arranged at the bottom of the assembly cavity, and the heating assembly comprises a reflection cover, a heating pipe arranged above the reflection cover and a kick temperature controller. The reflecting cover is provided with a boss protruding towards the heating tube, an avoiding hole is formed in the boss, and the upper end of the kick temperature controller penetrates through the avoiding hole and protrudes out of the boss. The temperature controller is arranged on the boss of the reflecting cover in the protruding mode, so that the temperature controller is closer to the heating pipe, the temperature of the heating pipe can be transmitted to the temperature controller more quickly, and therefore the temperature controller can sense the temperature in time, and temperature sensing lag is avoided; in order to guarantee the stability of installation and use of the temperature controller and prevent the temperature controller from being directly arranged on the reflecting cover in a protruding mode, the protruding height of the temperature controller relative to the boss is reduced through the boss arranged on the reflecting cover in a protruding mode, and the temperature sensing accuracy can be prevented from being affected by large shaking when the temperature controller is loosened.

Description

Technical Field

[0001] The utility model relates to the field of air fryers, in particular to an air fryer with reliable temperature sensing. Background Art

[0002] Existing air fryers are generally equipped with temperature sensors, including mechanical snap-action thermostats and electronic NTC sensors. While snap-action thermostats are less expensive, they can be prone to inaccurate temperature sensing, leading to problems like premature tripping of the heating element, resulting in poor heating, or delayed tripping, resulting in burnt food. Electronic NTC sensors, with their higher temperature control accuracy, are more expensive.

[0003] Related patent CN214230974U discloses an air fryer that uses a snap-action thermostat to monitor the temperature of the heating element. To improve the sensitivity of the snap-action thermostat, a heat conducting plate is provided to transmit the temperature of the heating element to the thermostat, enabling the thermostat to accurately sense the temperature of the heating element. This solution places the temperature sensing structure near the hot air assembly. When the air fryer is operating, the airflow driven by the hot air assembly facilitates timely transmission of the temperature of the heating element to the thermostat, thereby improving temperature sensitivity.

[0004] In addition to the aforementioned issues, some air fryers incorporate a bottom heating structure beneath the pot to improve the heating effect of ingredients. However, the sudden jump thermostat placed in this location, due to its relatively closed and airtight environment, takes longer to transmit the temperature from the heating tube to the thermostat. This further exacerbates the temperature sensing lag of the sudden jump thermostat when the heating tube and the sudden jump thermostat are far apart. In the relatively closed environment of the lower heating tube, ensuring timely temperature sensing and improving the temperature sensitivity of the sudden jump thermostat place higher demands on the structural design of the air fryer and the placement of the sudden jump thermostat. Utility Model Content

[0005] The utility model provides an air fryer with reliable temperature sensing, aiming to solve the problem that the existing sudden jump thermostat arranged under the pot body is not conducive to timely temperature sensing due to the influence of the closed environment, especially when the sudden jump thermostat is far away from the heating tube, the temperature sensing hysteresis will be aggravated, resulting in inaccurate temperature sensing and poor temperature sensing sensitivity.

[0006] The utility model discloses an air fryer with reliable temperature sensing, comprising a body provided with an assembly cavity, a fryer assembly which can be withdrawn and installed in the assembly cavity, a heating assembly being provided at the bottom of the assembly cavity, the heating assembly comprising a reflective cover, a heating tube provided above the reflective cover, and a sudden jump thermostat, the reflective cover being provided with a boss protruding toward the heating tube, the boss being provided with an avoidance hole, and the upper end of the sudden jump thermostat passing through the avoidance hole and protruding from the boss.

[0007] The air fryer with reliable temperature sensing of the present invention also has the following additional technical features:

[0008] The heating assembly further comprises a heat-conducting bracket arranged between the heating tube and the sudden jump thermostat, wherein the heat-conducting bracket comprises a first cover portion arranged on the heating tube and a second cover portion arranged on the upper end of the sudden jump thermostat.

[0009] The heat-conducting bracket includes a connecting portion connecting the first cover portion and the second cover portion, and the connecting portion is fixed to the top surface of the boss.

[0010] The inner surface of the second cover portion is provided with a heat-conducting layer for contacting the sudden temperature controller, and the heat conductivity of the heat-conducting layer is greater than the heat conductivity of the heat-conducting bracket.

[0011] The heat-conducting layer is thermally conductive silicone grease.

[0012] The second cover portion is arranged lower than the first cover portion and the height difference between the second cover portion and the first cover portion does not exceed 5 mm.

[0013] The sum of the height of the boss and the height of the sudden jump thermostat relative to the boss is H1, and the height from the center of the tube body of the heating tube to the bottom of the reflector is H2, H2-H1≤2mm.

[0014] The heating tube includes a U-shaped heating portion, which includes a first straight tube heating section and a second straight tube heating section respectively located on both sides of the boss, and a first curved tube connecting section connecting the first straight tube heating section and the second straight tube heating section. The distance from the first straight tube heating section to the boss is equal to the distance from the second straight tube heating section to the boss.

[0015] The heating assembly also includes a heat-conducting bracket arranged between the heating tube and the sudden jump thermostat, and the heat-conducting bracket includes a first cover portion mounted on the heating tube and a second cover portion mounted on the upper end of the sudden jump thermostat, and the first cover portion is overlapped on the first straight tube heating section or the second straight tube heating section.

[0016] The heating tube also includes an extended heating portion connected to both sides of the U-shaped heating portion. The U-shaped heating portion and the extended heating portion are integrally formed. The extended heating portion includes a third straight tube heating section, a fourth straight tube heating section, a second curved tube connecting section and a third curved tube connecting section. The second curved tube connecting section connects the first straight tube heating section and the third straight tube heating section, and the third curved tube connecting section connects the second straight tube heating section and the fourth straight tube heating section.

[0017] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0018] 1. For an air fryer with a bottom heating structure, the heating tube and the sudden jump thermostat at this position are in a relatively closed environment with no airflow. The heat conduction efficiency of the heating tube is low, resulting in a lack of accuracy in the temperature sensing lag of the sudden jump thermostat. In order to improve the heat conduction efficiency and thus improve the temperature sensing sensitivity of the sudden jump thermostat, this can be achieved by reducing the distance between the heating tube and the sudden jump thermostat. The present application makes the sudden jump thermostat closer to the heating tube by protruding the sudden jump thermostat on the boss of the reflector, which can speed up the temperature transfer of the heating tube to the sudden jump thermostat, thereby making the sudden jump thermostat sense the temperature in time and avoid temperature sensing lag. Furthermore, in order to ensure the stability of the installation and use of the sudden jump thermostat, it is avoided to directly protrude the sudden jump thermostat on the reflector. By protruding the sudden jump thermostat on the boss of the reflector, the height of the sudden jump thermostat relative to the boss is reduced, which can prevent the sudden jump thermostat from shaking greatly when it is loose and affecting the temperature sensing accuracy.

[0019] 2. To further improve heat transfer efficiency, shorten the time it takes for the heating tube's temperature to transfer to the sudden-action thermostat, and enhance temperature sensing accuracy, the heating assembly preferably includes a heat-conducting bracket positioned between the heating tube and the sudden-action thermostat. The bracket comprises a first cover portion positioned above the heating tube and a second cover portion positioned above the sudden-action thermostat. The heat-conducting bracket connects the heating tube and the sudden-action thermostat. The first and second covers not only provide mounting for the bracket but also enable contact with the heating tube and the sudden-action thermostat for heat transfer. This compact arrangement of components improves space utilization.

[0020] When the second cover is higher than the first, the heat from the heat pipe needs to climb a certain distance to reach the second cover when transferring downstream through the first cover, which prolongs the heat transfer time. To address this issue, as a preferred embodiment of this embodiment, the second cover is set lower than the first cover, and the height difference between the two does not exceed 5mm. The relatively low setting of the second cover helps to reduce the climbing path and accelerate heat transfer to the second cover. By controlling the height difference to no more than 5mm, the heat transfer efficiency can be kept within the required range.

[0021] To prevent the thermally conductive bracket from shaking due to factors such as machine handling, which could affect the contact between the first cover portion and the heat pipe and the contact between the second cover portion and the sudden trip thermostat, thereby affecting heat transfer efficiency, as a preferred embodiment of this embodiment, the thermally conductive bracket includes a connecting portion connecting the first cover portion and the second cover portion, and the connecting portion is fixed to the top surface of the boss. By fixing the connecting portion to the boss, the thermally conductive bracket can be firmly fixed. Once fixed, the connecting portion helps to provide downward tension to the first and second cover portions, which can promote the first cover portion to be in close contact with the heat pipe and the second cover portion to be in close contact with the sudden trip thermostat, thereby ensuring timely temperature sensing.

[0022] To further accelerate heat transfer to the snap thermostat, as a preferred embodiment of this embodiment, the inner surface of the second cover portion is provided with a heat-conducting layer for contact with the snap thermostat. The thermal conductivity of this heat-conducting layer is greater than that of the heat-conducting bracket. As a result, when heat is transferred from the first cover portion to the second cover portion, it is more quickly transferred through the heat-conducting layer to the snap thermostat, improving heat transfer efficiency and further enhancing temperature sensitivity.

[0023] 3. Considering the heat of the heating tube to be concentrated at the center, the closer the top of the snap thermostat is to this center in vertical height, the more efficient the heat transfer. In a preferred embodiment, the sum of the height of the boss and the protrusion of the snap thermostat relative to the boss is H1, and the height from the center of the heating tube to the bottom of the reflector is H2, where H2 - H1 ≤ 2 mm.

[0024] 4. The radial distance between the sudden jump thermostat and the heating tube is also one of the factors that affect the efficiency of heat conduction. In order to prevent the problem of inaccurate temperature sensing caused by uneven temperature distribution near the sudden jump thermostat, as a preferred embodiment, the heating tube includes a U-shaped heating part, and the U-shaped heating part includes a first straight tube heating section and a second straight tube heating section respectively located on both sides of the boss, and a first curved tube connecting section connecting the first straight tube heating section and the second straight tube heating section. The distance from the first straight tube heating section to the boss is equal to the distance from the second straight tube heating section to the boss. The temperature measurement area of the sudden jump thermostat is constructed using the U-shaped heating part. By adopting a symmetrical structural distribution relative to the boss, it is beneficial to make the temperature of most points in the temperature measurement area uniform. Then, when the sudden jump thermostat detects the temperature of this area, the accuracy of temperature sensing can be guaranteed, so as to accurately control the temperature in the cooking cavity.

[0025] The U-shaped heating part is the heat source closest to the sudden jump thermostat, wherein the first straight tube heating section and the second straight tube heating section are closer to the sudden jump thermostat than the first bent tube connecting section, and the sudden jump thermostat can be preferentially selected to detect the temperature of the first straight tube heating section and the second straight tube heating section. As a preferred embodiment of this embodiment, the heating assembly also includes a heat-conducting bracket arranged between the heating tube and the sudden jump thermostat, and the heat-conducting bracket includes a first cover portion mounted on the heating tube and a second cover portion mounted on the upper end of the sudden jump thermostat, and the first cover portion is overlapped on the first straight tube heating section or the second straight tube heating section. Since the distance from the first straight tube heating section to the boss is equal to the distance from the second straight tube heating section to the boss, the first cover portion can meet the temperature sensing accuracy requirements whether it is arranged on the first straight tube heating section or the second straight tube heating section, thereby increasing the flexibility of the layout of the heat-conducting bracket.

[0026] To increase the coverage of the heating tube, improve the uniformity of heat distribution, and thus improve the uniformity of heating the food, and prevent localized underheating or overheating of the food, as a preferred embodiment of this embodiment, the heating tube also includes extended heating portions connected to both sides of the U-shaped heating portion. The U-shaped heating portion and the extended heating portion are integrally formed. The extended heating portion includes a third straight tube heating segment, a fourth straight tube heating segment, a second curved tube connecting segment, and a third curved tube connecting segment. The second curved tube connecting segment connects the first straight tube heating segment and the third straight tube heating segment, and the third curved tube connecting segment connects the second straight tube heating segment and the fourth straight tube heating segment. By providing the extended heating portion, the radial coverage of the heating tube can be increased, allowing the heat to cover the middle and edge areas of the fryer assembly, helping to improve the heating effect of the food and enhance the taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 This is a schematic cross-sectional view of an air fryer according to one embodiment of the present application.

[0029] Figure 2 for Figure 1 A magnified schematic diagram of the structure at center A.

[0030] Figure 3 This is a schematic diagram of the distribution of heating pipes on the reflective cover in one embodiment of the present application.

[0031] Figure 4 for Figure 3 Schematic side view of the structure in .

[0032] Reference numerals:

[0033] 10. Machine body; 11. Assembly cavity; 12. Fryer assembly; 13. Reflector; 14. Heating tube; 15. Sudden jump thermostat; 16. Boss; 17. Bottom plate; 18. Heat-conducting bracket; 181. First cover part; 182. Second cover part; 183. Connecting part; 19. First straight tube heating section; 20. Second straight tube heating section; 21. First elbow connecting section; 22. Third straight tube heating section; 23. Fourth straight tube heating section; 24. Second elbow connecting section; 25. Third elbow connecting section; 26. Protrusion; 27. Hot air assembly. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0035] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0036] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can 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.

[0037] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] 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 being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0039] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integration; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or an interaction between two components. However, the phrase "direct connection" indicates that the two connected entities are not connected through a transition structure, but are connected solely through a connecting structure to form a single entity. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0041] like Figures 1 to 4 As shown, the present application provides an air fryer with reliable temperature sensing, comprising a body 10 provided with an assembly cavity 11 and a fryer assembly 12 that can be pulled out and installed in the assembly cavity 11. A heating assembly is provided at the bottom of the assembly cavity 11, and the heating assembly includes a reflective cover 13, a heating tube 14 arranged above the reflective cover 13, and a sudden jump thermostat 15. The reflective cover 13 is provided with a boss 16 protruding toward the heating tube 14, and the boss 16 is provided with an avoidance hole. The upper end of the sudden jump thermostat 15 passes through the avoidance hole and protrudes from the boss 16.

[0042] In an air fryer with a bottom heating structure, the heating tube and the sudden jump thermostat are located in a relatively closed environment with no airflow. The heat transfer efficiency of the heating tube is low, resulting in a temperature hysteresis and lack of accuracy in the sudden jump thermostat. To improve the heat transfer efficiency and thus the temperature sensitivity of the sudden jump thermostat, the distance between the heating tube and the sudden jump thermostat can be reduced. The present invention provides an air fryer with a bottom heating structure. The sudden jump thermostat 15 is positioned protrudingly on the boss 16 of the reflector 13, bringing the sudden jump thermostat 15 closer to the heating tube 14. This accelerates the transfer of temperature from the heating tube 14 to the sudden jump thermostat 15, thereby allowing the sudden jump thermostat 15 to sense temperature in a timely manner and avoid temperature hysteresis. Furthermore, to ensure the stability of the sudden jump thermostat 15 during installation and use, the sudden jump thermostat 15 is not directly positioned protrudingly on the reflector 13. By positioning the sudden jump thermostat 15 protrudingly on the boss 16 of the reflector 13, the height of the sudden jump thermostat 15 relative to the boss 16 is reduced. This prevents the sudden jump thermostat 15 from shaking significantly when loose, which could affect the temperature sensing accuracy.

[0043] like Figure 1As shown, the air fryer of the present application is suitable for a drawer-type air fryer. After the fryer assembly 12 is installed, the fryer assembly 12 cooperates with the slide rail on the body 10 through the relevant structure at the upper end, so that the bottom of the fryer assembly 12 is away from the bottom of the assembly cavity 11, providing conditions for the installation and use of the heating component at the bottom of the assembly cavity 11. Preferably, the middle area of the reflector 13 is concave relative to the edge area, providing sufficient space for the layout of the heating tube 14 and the sudden jump thermostat 15. A bottom plate 17 is provided below the reflector 13, and the sudden jump thermostat 15 can be fixed on the bottom plate 17 to achieve its installation. Preferably, the boss 16 is provided at the center of the reflector 13, and at least part of the area of the heating tube 14 is located within the range directly opposite the boss 16, so that there is a suitable distance between the sudden jump thermostat 15 and the heating tube 14, which is conducive to timely temperature sensing. When the vertical distance between the reflector 13 and the heating tube 14 is constant, and the sudden jump thermostat 15 is directly mounted on the reflector 13, while ensuring that the sudden jump thermostat 15 is stably mounted, the sudden jump thermostat 15 should not protrude too high relative to the reflector 13, as this would increase the vertical distance between the sudden jump thermostat 15 and the heating tube 14, resulting in low heat conduction efficiency and thus affecting the timely temperature sensing of the sudden jump thermostat 15. By having the sudden jump thermostat 15 protrude on the boss 16, the vertical distance between the sudden jump thermostat 15 and the heating tube 14 can be reduced, which facilitates faster transfer of the temperature of the heating tube 14 to the sudden jump thermostat 15, thereby ensuring accurate temperature sensing. A hot air assembly 27 is provided at the top of the assembly chamber 11. The ingredients in the fryer are heated by the upper and lower heat sources, which can improve the uniformity of the heating of the ingredients and help enhance the taste.

[0044] In order to further improve the heat conduction efficiency, shorten the time for the temperature of the heating tube 14 to be transferred to the sudden jump thermostat 15, and improve the temperature sensing accuracy, as a preferred embodiment, the heating assembly also includes a heat-conducting bracket 18 arranged between the heating tube 14 and the sudden jump thermostat 15, and the heat-conducting bracket 18 includes a first cover portion 181 mounted on the heating tube 14 and a second cover portion 182 mounted on the upper end of the sudden jump thermostat 15.

[0045] like Figure 2 or Figure 4As shown, a heat-conducting bracket 18 is used to connect the heating tube 14 and the sudden jump thermostat 15. The first cover portion 181 and the second cover portion 182 provide a mounting for the heat-conducting bracket 18 and can also contact the heating tube 14 and the sudden jump thermostat 15 respectively to transfer heat. The components are arranged compactly, which is conducive to improving space utilization. The heat-conducting bracket 18 can be made of a material with a high thermal conductivity coefficient. Compared with heat transfer to the sudden jump thermostat 15 through air, the heat transfer efficiency of the heat-conducting bracket 18 is higher. The first cover portion 181 and the second cover portion 182 can be configured to match the outer contours of the heating tube 14 and the sudden jump thermostat 15 to improve the contact effect between the first cover portion 181 and the heating tube 14 and the contact effect between the second cover portion 182 and the sudden jump thermostat 15.

[0046] When the second cover portion 182 is higher than the first cover portion 181, the heat from the heat pipe 14 needs to climb a certain distance to reach the second cover portion 182 when transferring downstream through the first cover portion 181, which will prolong the heat transfer time. To address this problem, as a preferred embodiment of this embodiment, the second cover portion 182 is set lower than the first cover portion 181, and the height difference between the two does not exceed 5mm. The relatively low setting of the second cover portion 182 helps to reduce the climbing path and accelerate heat transfer to the second cover portion 182. By controlling the height difference to no more than 5mm, the heat transfer efficiency can be kept within the required range.

[0047] In order to avoid the thermal conductive bracket 18 from shaking due to the influence of machine transportation, affecting the contact between the first cover part 181 and the heating tube 14 and the contact between the second cover part 182 and the sudden jump thermostat 15, thereby affecting the heat conduction efficiency, as a preferred embodiment of this embodiment, the thermal conductive bracket 18 includes a connecting part 183 connecting the first cover part 181 and the second cover part 182, and the connecting part 183 is fixed to the top surface of the boss 16.

[0048] like Figure 2 or Figure 4 As shown, by fixing the connecting portion 183 to the boss 16, the thermal bracket 18 can be firmly fixed. After the connecting portion 183 is fixed, it is conducive to providing a downward tensioning force to the first cover portion 181 and the second cover portion 182, which can cause the first cover portion 181 to be close to the heating pipe 14 and the second cover portion 182 to be close to the sudden trip thermostat 15, thereby ensuring timely temperature sensing. For example, if the connecting portion 183 extends horizontally, it can increase the contact area with the boss 16 and improve the reliability of the fixation. By pulling the first cover portion 181 and the second cover portion 182 downward at both ends of the connecting portion 183, the first cover portion 181 and the second cover portion 182 can be prevented from floating upward, resulting in poor contact and affecting heat conduction. Based on the fixation of the connecting portion 183, the fixing of the positions of the first cover portion 181 and the second cover portion 182 can also be omitted, which helps to simplify the installation procedure of the thermal bracket 18.

[0049] To further accelerate heat transfer to the sudden jump thermostat 15, as a preferred embodiment of this embodiment, the inner surface of the second cover portion 182 is provided with a thermally conductive layer for contact with the sudden jump thermostat 15. The thermal conductivity of the thermally conductive layer is greater than the thermal conductivity of the thermally conductive bracket 18. As a result, when heat is transferred from the first cover portion 181 to the second cover portion 182, it can be transferred to the sudden jump thermostat 15 more quickly through the thermally conductive layer, improving the heat conduction efficiency and further enhancing the temperature sensitivity. The thermally conductive layer can be directly applied to the inner surface of the second cover portion 182, or processed into a solid structure to facilitate replacement in the event of failure. The thermally conductive layer is made of, for example, thermally conductive silicone grease.

[0050] The heat of the heating tube 14 is considered to be concentrated in the center. When the top of the sudden jump thermostat 15 is infinitely close to the center in vertical height, it is more conducive to improving the heat conduction efficiency. Figure 2 As shown, as a preferred embodiment, the sum of the height of the boss 16 and the height of the kick thermostat 15 relative to the boss 16 is H1, and the height from the center of the heat pipe 14 to the bottom of the reflector 13 is H2, where H2-H1≤2mm. In a preferred embodiment, H1 is equal to H2.

[0051] The radial distance between the sudden jump thermostat 15 and the heating tube 14 is also one of the factors affecting the heat conduction efficiency. In order to prevent the problem of inaccurate temperature sensing caused by uneven temperature distribution near the sudden jump thermostat 15, as a preferred embodiment, the heating tube 14 includes a U-shaped heating part, and the U-shaped heating part includes a first straight tube heating section 19 and a second straight tube heating section 20 respectively located on both sides of the boss 16, and a first curved tube connecting section 21 connecting the first straight tube heating section 19 and the second straight tube heating section 20. The distance from the first straight tube heating section 19 to the boss 16 is equal to the distance from the second straight tube heating section 20 to the boss 16.

[0052] like Figure 3 As shown, the temperature measuring area of the sudden jump thermostat 15 is constructed by using a U-shaped heating part. By adopting a symmetrical structural distribution relative to the boss 16, it is beneficial to make the temperature of most points in the temperature measuring area uniform. Then, when the sudden jump thermostat 15 detects the temperature of this area, the accuracy of the temperature sensing can be guaranteed, so as to accurately control the temperature in the cooking cavity.

[0053] The U-shaped heating portion is the heat source closest to the sudden jump thermostat 15. The first straight tube heating section 19 and the second straight tube heating section 20 are closer to the sudden jump thermostat 15 than the first curved tube connecting section 21. Therefore, the sudden jump thermostat 15 can be preferentially configured to detect the temperatures of the first straight tube heating section 19 and the second straight tube heating section 20. As a preferred embodiment of this embodiment, the heating assembly further includes a heat-conducting bracket 18 disposed between the heating tube 14 and the sudden jump thermostat 15. The heat-conducting bracket 18 includes a first cover portion 181 mounted on the heating tube 14 and a second cover portion 182 mounted on the upper end of the sudden jump thermostat 15. The first cover portion 181 is overlapped with the first straight tube heating section 19 or the second straight tube heating section 20. Since the distance from the first straight tube heating section 19 to the boss 16 is equal to the distance from the second straight tube heating section 20 to the boss 16, the first cover portion 181 can be set on either the first straight tube heating section 19 or the second straight tube heating section 20 to meet the temperature sensing accuracy requirements, thereby increasing the flexibility of the layout of the thermal conductive bracket 18.

[0054] like Figure 3 As shown, when the first cover portion 181 is provided on the first straight tube heating section 19 or the second straight tube heating section 20, the heat conductive bracket 18 is provided on the vertical connection line between the heating tube 14 and the sudden jump thermostat 15 to shorten the heat conduction path as much as possible and improve the heat conduction efficiency.

[0055] In order to increase the coverage of the heating tube 14, improve the uniformity of heat distribution and thus improve the uniformity of heating of food, and prevent local insufficient heating or local overheating of food, as a preferred embodiment of the present embodiment, the heating tube 14 also includes an extended heating part connected to both sides of the U-shaped heating part, the U-shaped heating part and the extended heating part are integrally formed, and the extended heating part includes a third straight tube heating section 22, a fourth straight tube heating section 23, a second curved pipe connecting section 24 and a third curved pipe connecting section 25, the second curved pipe connecting section 24 connects the first straight tube heating section 19 and the third straight tube heating section 22, and the third curved pipe connecting section 25 connects the second straight tube heating section 20 and the fourth straight tube heating section 23.

[0056] like Figure 3 As shown, the provision of an extended heating section increases the radial coverage of the heating tube 14, allowing heat to reach the center and edges of the fryer assembly 12, improving food heating efficiency and enhancing the flavor. One end of the third straight heating section 22 and one end of the fourth straight heating section 23 are respectively connected to the cold end of the heating tube 14, which can be threaded and fixed to the reflector 13. The heating tube 14 is generally formed into an M-shape.

[0057] Furthermore, in order to improve the fixing effect of the heating tube 14, a protrusion 26 is further provided on the reflector 13 for supporting and fixing the heating tube 14. Figure 3As shown, the reflector 13 is provided with protrusions 26 on both side edges of the boss 16, and the third straight tube heating section 22 and the fourth straight tube heating section 23 are respectively fixed on the corresponding protrusions 26, which is conducive to making the heating tube 14 as a whole at the same height, and can ensure that the vertical distance from each point on the heating tube 14 to the sudden jump thermostat 15 is consistent, thereby improving the accuracy of temperature sensing.

[0058] By improving the arrangement of the sudden jump thermostat 15 as described above, it is possible to ensure that the sudden jump thermostat 15 senses temperature in a timely manner, thereby improving the temperature sensing accuracy and sensitivity. The application adopts the sudden jump thermostat as the temperature sensing structure, which is relatively low in cost.

[0059] The technical solutions protected by this utility model are not limited to the above-described embodiments. It should be noted that the combination of the technical solutions of any one embodiment with the technical solutions of one or more other embodiments falls within the scope of protection of this utility model. Although the above description of this utility model has been provided in detail using general instructions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on this utility model. Therefore, 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 with reliable temperature sensing, comprising a body with an assembly cavity and a fryer assembly that can be pulled out and installed in the assembly cavity, wherein a heating assembly is provided at the bottom of the assembly cavity, characterized in that: The heating assembly includes a reflective cover, a heating tube arranged above the reflective cover, and a sudden jump thermostat. The reflective cover is provided with a boss protruding toward the heating tube, the boss is provided with an avoidance hole, and the upper end of the sudden jump thermostat passes through the avoidance hole and protrudes from the boss.

2. The air fryer with reliable temperature sensing according to claim 1, characterized in that: The heating assembly further comprises a heat-conducting bracket arranged between the heating tube and the sudden jump thermostat, wherein the heat-conducting bracket comprises a first cover portion arranged on the heating tube and a second cover portion arranged on the upper end of the sudden jump thermostat.

3. The air fryer with reliable temperature sensing according to claim 2, characterized in that: The heat-conducting bracket includes a connecting portion connecting the first cover portion and the second cover portion, and the connecting portion is fixed to the top surface of the boss.

4. The air fryer with reliable temperature sensing according to claim 2, characterized in that: The inner surface of the second cover portion is provided with a heat-conducting layer for contacting the sudden temperature controller, and the heat conductivity of the heat-conducting layer is greater than the heat conductivity of the heat-conducting bracket.

5. The air fryer with reliable temperature sensing according to claim 4, characterized in that: The heat-conducting layer is thermally conductive silicone grease.

6. The air fryer with reliable temperature sensing according to claim 2, characterized in that: The second cover portion is arranged lower than the first cover portion and the height difference between the second cover portion and the first cover portion does not exceed 5 mm.

7. The air fryer with reliable temperature sensing according to claim 1, characterized in that: The sum of the height of the boss and the height of the sudden jump thermostat relative to the boss is H1, and the height from the center of the tube body of the heating tube to the bottom of the reflector is H2, H2-H1≤2mm.

8. The air fryer with reliable temperature sensing according to claim 1, characterized in that: The heating tube includes a U-shaped heating portion, which includes a first straight tube heating section and a second straight tube heating section respectively located on both sides of the boss, and a first curved tube connecting section connecting the first straight tube heating section and the second straight tube heating section. The distance from the first straight tube heating section to the boss is equal to the distance from the second straight tube heating section to the boss.

9. The air fryer with reliable temperature sensing according to claim 8, characterized in that: The heating assembly also includes a heat-conducting bracket arranged between the heating tube and the sudden jump thermostat, and the heat-conducting bracket includes a first cover portion mounted on the heating tube and a second cover portion mounted on the upper end of the sudden jump thermostat, and the first cover portion is overlapped on the first straight tube heating section or the second straight tube heating section.

10. The air fryer with reliable temperature sensing according to claim 8, characterized in that: The heating tube also includes an extended heating portion connected to both sides of the U-shaped heating portion. The U-shaped heating portion and the extended heating portion are integrally formed. The extended heating portion includes a third straight tube heating section, a fourth straight tube heating section, a second curved tube connecting section and a third curved tube connecting section. The second curved tube connecting section connects the first straight tube heating section and the third straight tube heating section, and the third curved tube connecting section connects the second straight tube heating section and the fourth straight tube heating section.

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