Heating structure, cover body assembly and cooking utensil

Abstract

The utility model discloses a heating structure, cover body subassembly and cooking utensil, relates to kitchen cooking equipment technical field, wherein the heating structure includes heat conduction substrate and heating film, the heating film is connected to the plate surface of heat conduction substrate, the heating film is equipped with at least two main body section and at least one corner section, any corner section is connected with two adjacent main body sections, and the resistance of the corner section is configured to be smaller than that of the main body sections. According to the technical scheme provided by the utility model, the problem of heat accumulation on the heating film is solved, the overall heating amount of the heating film is more uniform, and the practicability and the reliability of the cover body assembly are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen cooking equipment, and particularly relates to a heating structure, a cover body assembly and a cooking appliance. Background Art

[0002] In the related art, when cooking ingredients with cooking appliances such as rice cookers and steamers, the moisture in the ingredients is heated and a large amount of water vapor is easily generated in the cooking cavity. To avoid the generation of condensed water when the water vapor contacts the inner surface of the pot lid, a heating device can usually be arranged inside the pot lid of the cooking appliance, and the heating device is used to heat the inner surface of the pot lid so that the inner surface of the pot lid can be heated to the temperature of the water vapor, reducing the temperature difference between the inner surface of the pot lid and the cooking cavity, and effectively avoiding the condensation of water vapor on the inner surface of the pot lid.

[0003] Most of the heating devices inside the pot lid use heating films with a small thickness for heating, and the corner structure on the heating film is prone to heat accumulation problems during operation, resulting in a large amount of heat generated at this part of the heating film, and then causing uneven overall heating of the heating device, reducing the practicability and reliability of the pot lid heating. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a heating structure, a cover body assembly and a cooking appliance, aiming to reduce the structural resistance at the wiring and corner parts of the heating film, reduce the heat accumulation problem on the heating film, make the overall heat generation of the heating film more uniform, and improve the practicability and reliability of the cover body assembly.

[0005] To achieve the above purpose, the heating structure proposed by the utility model includes a heat-conducting substrate and a heating film. The heating film is connected to the plate surface of the heat-conducting substrate. The heating film is provided with at least two main sections and at least one corner section. Any one of the corner sections connects two adjacent main sections, and the resistance of the corner section is configured to be less than the resistance of the main section.

[0006] In one embodiment, the resistance value of the main section is defined as R, and the resistance value of the corner section is defined as R1, and 0.1≤R1 / R≤0.5.

[0007] In one embodiment, the heating film is provided with a wiring terminal, the wiring terminal is connected to the main section, and the resistance of the wiring terminal is configured to be less than the resistance of the main section.

[0008] In one embodiment, the resistance value of the wiring terminal is defined as R2, and 0.1≤R2 / R≤0.5.

[0009] In one embodiment, the heating structure further includes an insulating layer, and the insulating layer is attached to the plate surface of the heat-conducting substrate and covers the heating film.

[0010] In one embodiment, the heating film includes a substrate and a conductive coating, and the conductive coating is attached to the outer surface of the substrate.

[0011] In one embodiment, the thickness of the conductive coating in the corner section is greater than that in the main body section.

[0012] In one embodiment, at least part of the structure of the main body section is arranged as an arc structure. And / or, the material of the heat-conducting substrate is glass.

[0013] The present utility model further provides a cover assembly, which includes a cover body and a heating structure. The heating structure is the above-mentioned heating structure, and the heating structure is connected to the cover body, and the cover body is used to cover or open the pot body.

[0014] In one embodiment, the heating structure includes a heat-conducting substrate and a heating film. The cover assembly further includes a sealing ring, and the sealing ring is arranged around the outer periphery of the heat-conducting substrate and is connected to the cover body.

[0015] In one embodiment, the cover body is provided with a temperature measuring device, and the heat-conducting substrate is provided with an avoidance hole, and the temperature measuring device is arranged through the avoidance hole. And / or, the cover assembly further includes a heat insulation layer, and the heat insulation layer is arranged between the heat-conducting substrate and the cover body.

[0016] The present utility model further provides a cooking appliance, which includes a pot body and a cover assembly. The cover assembly is the above-mentioned cover assembly, and the cover assembly is connected to the pot body.

[0017] The technical solution of the present utility model is to adopt a structure with a weak resistance at the corner section of the heating film, so that the structural resistance value of the corner section is set to be smaller than that of the main body section, thereby avoiding the generation of more heat at the corner section of the heating film, preventing the occurrence of heat accumulation at the corner section of the heating film, being beneficial to better reducing the temperature difference between the corner section and the main body section of the heating film, realizing uniform heating of the heat-conducting substrate by the heating film, effectively avoiding local overheating of the heating structure and affecting other components on the cover assembly, ensuring the stable operation of the cooking appliance, and further improving the practicability and reliability of the heating structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 Schematic structural diagram of an embodiment of a cooking appliance provided by the present utility model;

[0020] Figure 2 is Figure 1 Partial enlarged view at A in

[0021] Figure 3 Schematic structural diagram of an embodiment of a heating structure provided by the present utility model;

[0022] Figure 4 Schematic structural diagram of another embodiment of a heating structure provided by the present utility model;

[0023] Figure 5 Schematic structural diagram of still another embodiment of a heating structure provided by the present utility model.

[0024] Explanation of reference numerals in the drawings:

[0025] 500, cooking appliance; 100, lid assembly; 10, heating structure; 11, heat conduction substrate; 111, avoidance hole; 13, heating film; 131, main body section; 133, corner section; 135, connection terminal; 30, lid body; 50, sealing ring; 70, temperature measuring device; 90, heat insulation layer; 200, pot body.

[0026] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] In the related art, when cooking utensils such as rice cookers and steamers cook food materials, the moisture in the food materials is heated and is likely to generate a large amount of water vapor in the cooking cavity. To avoid the generation of condensed water when the water vapor contacts the inner surface of the pot lid, a heating device is usually provided inside the pot lid of the cooking utensil, and the heating device is used to heat the inner surface of the pot lid so that the inner surface of the pot lid can be heated to the temperature of the water vapor, reducing the temperature difference between the inner surface of the pot lid and the cooking cavity, and effectively avoiding the condensation of water vapor on the inner surface of the pot lid. Most of the heating devices inside the pot lid use heating films with a small thickness for heating, and the corner structure on the heating film is prone to heat accumulation problems during operation, resulting in a relatively large heat generation at this part of the heating film, and then causing uneven overall heat generation of the heating device, reducing the practicability and reliability of the pot lid heating. To address the above problems, the present utility model proposes a heating structure 100.

[0031] Please refer to Figures 1 to 5 , in an embodiment of the present utility model, the heating structure 10 includes a heat-conducting substrate 11 and a heating film 13. The heating film 13 is connected to the plate surface of the heat-conducting substrate 11. The heating film 13 is provided with at least two main segments 131 and at least one corner segment 133. Any one corner segment 133 is connected to two adjacent main segments 131, and the resistance of the corner segment 133 is configured to be less than the resistance of the main segment 131.

[0032] It can be understood that when the cover body assembly 100 covers the pot body 200, the heat conduction substrate 11 can be correspondingly arranged to cover the pot opening of the pot body 200. During the operation of the cooking appliance 500, the steam temperature in the pot body 200 can be detected, and the detected temperature can be fed back to the control system, so that the control system regulates the operation of the heating film 13 to generate heat, making the heat conduction substrate 11 heated to the same temperature as that in the pot body 200. Furthermore, when the cooking appliance 500 heats the food materials in the pot body 200 to generate water vapor, it can prevent the water vapor from contacting the relatively low-temperature heat conduction substrate 11 and condensing to produce condensed water, effectively reducing the generation of condensed water on the cover body assembly 100, avoiding condensed water droplets from falling onto the food materials when the cover body assembly 100 opens the pot opening of the pot body 200, and better improving the cooking effect and reliability of the cooking appliance 500.

[0033] The heating structure 10 can be formed by laying a heating film 13 on the plate surface of the heat conduction substrate 11 facing the cover body 30. By energizing the heating film 13, the heating film 13 can generate a certain amount of heat acting on the heat conduction substrate 11. The heat conduction substrate 11 can be made of a material with certain heat conduction performance, so that the heat generated by the heating film 13 can quickly act on the heat conduction substrate 11, preventing the condensation of water vapor on the cover body assembly 100. Since the pot opening of the pot body 200 of the cooking appliance 500 is mostly arranged in a circular structure, at this time, the heat conduction substrate 11 can be arranged in a circular structure corresponding to the shape of the pot opening of the pot body 200.

[0034] In the present application, the heating film 13 may include at least two main body segments 131 and at least one corner segment 133. Both the main body segment 131 and the corner segment 133 are configured to have certain electrical conductivity and heat generation properties. The corner segment 133 can be used to connect one end of two adjacent main body segments 131, so that the heating film 13 can be wound and connected by at least two main body segments 131 and at least one corner segment 133 to form a circular-like thin film structure corresponding to the plate surface of the heat conducting substrate 11, ensuring the overall heating of the heat conducting substrate 11 by the heating film 13. Two ends of the two main body segments 131 facing away from the corner segment 133 of the heating film 13 can be respectively electrically connected to the positive and negative electrodes of the cover body assembly 100, so that when electric energy flows through the heating film 13, a certain amount of heat can be generated under the action of the resistance value of the heating film 13. When the heating film 13 is energized, there is a certain difference in the voltage distance when the current flows through the main body segment 131 and the corner segment 133, resulting in a greater electrical energy effect of the current on the corner segment 133. By setting the corner segment 133 and the main body segment 131 of the heating film 13 with a structure of different resistances, the structural resistance value of the corner segment 133 can be made smaller than that of the main body segment 131, and then the resistance of the corner segment 133 can be weakened, which is beneficial to reducing the heat generated by the corner segment 133 under the action of electrical energy, avoiding the large amount of heat generated by the large electrical energy effect on the corner segment 133, preventing the heat accumulation effect of the heating film 13 at the corner segment 133, effectively reducing the temperature difference between the main body segment 131 and the corner segment 133 during energization and heating, enabling the heating film 13 to better achieve the effect of overall uniform heating, ensuring the stable and reliable operation of the cover body assembly 100 on the cooking appliance 500, and improving the practicability and reliability of the heating structure 10.

[0035] Among them, the main body segment 131 and the corner segment 133 can be made of two conductive materials with a certain resistance value difference; or, the main body segment 131 and the corner segment 133 can be made of the same conductive material with different structural dimensions. Furthermore, different material settings or different structural dimension settings can be used to make the resistance of the main body segment 131 greater than the resistance of the corner segment 133, effectively preventing the local heat accumulation effect of the heating film 13 and ensuring the uniform heat generation of the heating structure 10.

[0036] The technical solution of the present utility model is to arrange the heating film 13 with a weak resistance structure at the corner section 133, so that the structural resistance value of the corner section 133 is set to be less than that of the main body section 131. Furthermore, it can avoid the generation of more heat at the corner section 133 of the heating film 13, prevent the occurrence of heat accumulation at the corner section 133 of the heating film 13, which is beneficial to better reduce the temperature difference between the corner section 133 and the main body section 131 of the heating film 13, realize the uniform heating of the heating film 13 on the heat-conducting substrate 11, effectively avoid local overheating of the heating structure 10 and affecting other components on the cover assembly 100, ensure the stable operation of the cooking appliance 500, and further improve the practicability and reliability of the heating structure 10.

[0037] In the embodiment of the present utility model, the resistance value of the main body section 131 is defined as R, and the resistance value of the corner section 133 is defined as R1, where 0.1 ≤ R1 / R ≤ 0.5.

[0038] In this embodiment, by correspondingly configuring the structural materials of the corner section 133 and the main body section 131, or correspondingly adjusting the structural dimensions of the corner section 133 and the main body section 131, the ratio of the resistance value R1 of the corner section 133 to the resistance value R of the main body section 131 can be made to be within the range of 0.1 ≤ R1 / R ≤ 0.5, so that the heating film 13 can better reduce the heating temperature difference between the main body section 131 and the corner section 133, and better realize the uniform heating effect of the heating structure 10. Among them, by making R1 / R ≤ 0.5, within this range, the structural resistance value of the corner section 133 can be set to be less than that of the main body section 131, so that the heating film 13 can reduce the heat generated at the corner section 133 by reducing the resistance value of the corner section 133, and further narrow the heating temperature difference between the corner section 133 and the main body section 131, ensuring the uniform heating of the heating structure 10; at the same time, by making R1 / R ≥ 0.1, within this range, it can be avoided that the structural resistance value of the corner section 133 is too small, which is beneficial to avoiding a large heating temperature difference between the main body section 131 and the corner section 133 caused by the heat emitted by the main body section 131 being more than that emitted by the corner section 133, so that the heat emitted by the corner section 133 and the main body section 131 is relatively close, ensuring the overall heat generation balance of the heating film 13, better improving the uniform heating effect of the heating structure 10, and further improving the practicability and reliability of the heating structure 10.

[0039] Refer to Figures 3 to 5 In the embodiment of the present utility model, the heating film 13 is provided with a wiring terminal 135, the wiring terminal 135 is connected to the main body section 131, and the resistance of the wiring terminal 135 is configured to be less than the resistance setting of the main body section 131.

[0040] In this embodiment, the heating film 13 can be connected to terminal ends 135 at one ends of two main body segments 131 facing away from the corner segment 133 respectively. The terminal ends 135 can be terminal structures that are matched and connected to external connection cables, or can be connection blades with a larger contact area, so that the heating structure 10 can be more conveniently wired to the power transmission cables on the cover body assembly 100 through the terminal ends 135, improving the assembly convenience of the heating structure 10. Since the terminal ends 135 are directly in contact with the external cables, a relatively large amount of electrical energy acts on the terminal ends 135 to generate a certain amount of heat. At this time, by setting the structural resistance value of the terminal ends 135 to be smaller than that of the main body ends, the resistance on the terminal ends 135 can be weakened, which is beneficial to reducing the heat generated by the action of electrical energy on the terminal ends 135, preventing the heat emitted by the terminal ends 135 from being greater than the heat emitted by the main body segment 131 when powered on, and avoiding the phenomenon of heat accumulation at the terminal ends 135 of the heating film 13, so that the heating structure 10 can achieve a more uniform heating effect, further improving the practicability and reliability of the heating structure 10.

[0041] In the embodiment of the present utility model, it is defined that the resistance value of the terminal end 135 is R2, and 0.1 ≤ R2 / R ≤ 0.5.

[0042] In this embodiment, by correspondingly configuring the structural materials of the terminal ends 135 and the main body segments 131, or correspondingly adjusting the structural dimensions of the terminal ends 135 and the main body segments 131, the ratio of the resistance value R2 of the terminal ends 135 to the resistance value R of the main body segments 131 can be made to be within the range of 0.1 ≤ R2 / R ≤ 0.5, so that the heating film 13 can better reduce the heating temperature difference between the main body segments 131 and the terminal ends 135, and better achieve the uniform heating effect of the heating structure 10. Among them, by making R2 / R ≤ 0.5, within this range, the structural resistance value of the terminal ends 135 can be set to be smaller than that of the main body segments 131, so that the heating film 13 can reduce the heat generated at the terminal ends 135 by reducing the resistance value of the terminal ends 135, thereby reducing the heating temperature difference between the terminal ends 135 and the main body segments 131, and ensuring the uniform heating of the heating structure 10; at the same time, by making R2 / R ≥ 0.1, within this range, it is possible to avoid the structural resistance value of the terminal ends 135 from being too small, which is beneficial to avoiding the heating temperature difference between the main body segments 131 and the terminal ends 135 from being large due to the heat emitted by the main body segments 131 being more than the heat emitted by the terminal ends 135, so that the heat emitted by the terminal ends 135 and the main body segments 131 is relatively close, ensuring the overall heat generation balance of the heating film 13, better improving the uniform heating effect of the heating structure 10, and further improving the practicability and reliability of the heating structure 10.

[0043] In the embodiment of the present utility model, the heating structure 10 further includes an insulating layer, and the insulating layer adheres to the plate surface of the heat-conducting substrate 11 and covers the heating film 13.

[0044] In this embodiment, the heating structure 10 may cover an insulating layer on the surface of the heat-conducting substrate 11. The insulating layer may be a coating applied to the surface of the heat-conducting substrate 11 facing the cover body 30 and covering the surface of the heating film 13; or it may be a paste film made of materials such as polyimide or heat-resistant adhesive tape, and the insulating layer is pasted on the surface of the heat-conducting substrate 11 facing the cover body 30 and covers the heating film 13. The insulating layer may have certain insulating properties, which is conducive to better improving the connection stability and reliability between the heat-conducting substrate 11 and the heating film 13 under the action of the insulating layer. At the same time, it can prevent the conductive structure of the heating film 13 from being exposed, prevent the heating film 13 from directly contacting other components on the cover body 30 when the heating structure 10 is installed on the cover assembly 100, reduce the potential electrical hazards, and further improve the practicability and reliability of the heating structure 10.

[0045] In an embodiment of the present utility model, the heating film 13 includes a substrate and a conductive coating, and the conductive coating is attached to the outer surface of the substrate.

[0046] In this embodiment, the heating film 13 can be formed by covering a conductive coating on the outer surface of the substrate. The substrate can be made of an insulating material with good high-temperature resistance. When the heating film 13 is energized, the conductive coating generates heat under the action of electric energy, and the heating effect of the heating film 13 can be stably achieved. Among them, the conductive coating can be attached to the outer surface of the substrate by ink printing. At this time, the heating film 13 can be graphene conductive ink, metal ink, and conductive ink such as carbon nanotubes and carbon fibers; or the heating film 13 can be a conductive coating such as graphene coating and metal coating, which is coated on the outer surface of the substrate by spraying or brushing and other processes. Furthermore, materials with better heating effects such as graphene can be used to better meet the heating requirements of the heating structure 10, and at the same time, the processing convenience of the heating film 13 can be better improved by forming a conductive coating on the surface of the substrate, further improving the practicability and structural reliability of the heating structure 10.

[0047] In an embodiment of the present utility model, the thickness of the conductive coating of the corner section 133 is greater than the thickness of the conductive coating of the main body section 131.

[0048] In this embodiment, the heating film 13 can use processes such as secondary printing or local repeated spraying to set a conductive coating with a larger thickness at the corner section 133 of the heating film 13, so that the thickness of the conductive coating on the outer periphery of the corner section 133 is greater than that of the conductive coating on the outer periphery of the main body section 131. This is conducive to setting the conductive structure size of the corner section 133 to be larger than that of the main body section 131, so that the structural resistance of the heating film 13 at the corner section 133 can be smaller than that of the main body section 131, realizing the resistance weakening of the corner section 133. Furthermore, it can better reduce the difference in heat generated between the main body section 131 and the corner section 133, reduce the heating temperature difference of the overall structure of the heating film 13, enable the heating structure 10 to achieve a more uniform heating effect, and further improve the structural stability and reliability of the heating structure 10.

[0049] Refer to Figures 3 to 5 , in the embodiment of the present utility model, at least part of the structure of the main body section 131 is set as an arc structure. And / or, the material of the heat-conducting substrate 11 is glass.

[0050] In this embodiment, the main body section 131 can be arranged in an arc-shaped strip structure. Furthermore, multiple main body sections 131 can be arranged radially along the central axis of the heat-conducting substrate 11, and then the corner section 133 is used to connect the ends of two adjacent main body sections 131, so that the heating film 13 can better coil and connect the arc-shaped main body section 131 and the corner section 133 to form a film structure similar to a circle, which is conducive to the heating film 13 better corresponding to the structure of the heat-conducting substrate 11 and better realizing the uniform heating of the heat-conducting substrate 11, and further improving the structural stability and reliability of the heating structure 10. Among them, part of the structure of two main body sections 131 of the heating film 13 can be set as an arc structure, and the other parts of the two main body sections 131 can be set as straight strip structures, so that the heating film 13 can be electrically connected to the connecting wire and cable of the cover body assembly 100 by using the straight strip structures of these two main body sections 131, ensuring the stable operation of the heating structure 10 on the cover body assembly 100.

[0051] In addition, the heat-conducting substrate 11 can be made of a glass material with certain light-transmitting properties. The insulating property and certain heat-conducting property of the glass material can be utilized to ensure the stable and reliable heating of the heat-conducting substrate 11 by the heating film 13, which is beneficial to better prevent the water vapor in the heat-generating structure 10 from making electrical contact with the pot body 200, reduce the potential electrical hazard of the heat-generating structure 10, and at the same time, the heat-conducting substrate 11 made of the glass material can be used to better improve the aesthetics of the heat-generating structure 10, further enhancing the practicality and reliability of the heat-generating structure 10. At this time, by setting the resistance of the corner section 133 of the heating film 13 to be smaller than that of the main body section 131, the heating film 13 can achieve a more uniform heat generation effect, which is beneficial to avoiding a large temperature difference in the heat transferred from the heating film 13 to the entire heat-conducting substrate 11, which may cause the heat-conducting substrate 11 to crack with a certain probability, and is beneficial to better ensuring the stable operation of the heat-generating structure 10, further enhancing the overall structural stability and reliability of the heat-generating structure 10.

[0052] The present utility model further provides a cover body assembly 100, which includes a cover body 30 and a heat-generating structure 10. The specific structure of the heat-generating structure 10 refers to the above-mentioned embodiments. Since the cover body assembly 100 adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated herein one by one.

[0053] Refer to Figure 2 , in the embodiment of the present utility model, the heat-generating structure 10 includes a heat-conducting substrate 11 and a heating film 13. The cover body assembly 100 further includes a sealing ring 50, and the sealing ring 50 is disposed around the outer periphery of the heat-conducting substrate 11 and connected to the cover body 30.

[0054] In this embodiment, the cover body assembly 100 can use the sealing ring 50 to be disposed around the outer periphery of the heat-conducting substrate 11, and the sealing ring 50 is installed and connected to the surface of the cover body 30 covering the pot body 200, so that under the action of the sealing ring 50, the gap between the heat-conducting substrate 11 and the cover body 30 can be stably sealed, effectively preventing water vapor from flowing into the gap between the heat-conducting substrate 11 and the cover body 30 when rising and spreading towards the cover body assembly 100, affecting the stable operation of the heating film 13 and the components in the cover body 30, realizing the protective effect on the heat-generating structure 10 and the cover body 30, and further enhancing the structural stability and reliability of the cover body assembly 100.

[0055] Refer to Figure 1 and Figure 3 , in the embodiment of the present utility model, the cover body 30 is provided with a temperature measuring device 70, the heat-conducting substrate 11 is provided with an avoidance hole 111, and the temperature measuring device 70 is disposed through the avoidance hole 111. And / or, the cover body assembly 100 further includes a heat insulation layer 90, and the heat insulation layer 90 is disposed between the heat-conducting substrate 11 and the cover body 30.

[0056] In this embodiment, a temperature measuring device 70 such as a thermometer or a temperature measuring sensor can be provided on the cover body 30 of the cover body assembly 100, so that the cover body assembly 100 can use the temperature measuring device 70 to detect the temperature inside the pot body 200, ensuring the stable regulation of the heating temperature of the heating structure 10 by the cover body assembly 100. Since the heat conduction substrate 11 can be arranged to cover the mouth of the pot body 200 when the cover body assembly 100 covers the pot body 200, an avoidance hole 111 can be provided on the heat conduction substrate 11, so that the temperature measuring device 70 can be arranged at a position corresponding to the avoidance hole 111 on the cover body 30. Furthermore, the temperature measuring device 70 can pass through the avoidance hole 111 to stably detect the temperature of the pot body 200, further improving the overall structural stability and reliability of the cover body assembly 100. Among them, the cover body assembly 100 can be provided with a sealing structure at the avoidance hole 111, which is beneficial to sealing the gap between the heat conduction substrate 11 and the cover body 30 by using this sealing structure, preventing water vapor from entering the gap between the heat conduction substrate 11 and the cover body 30 and affecting the stable operation of the components inside the cover body 30 and the heating film 13.

[0057] In addition, by providing a heat insulation layer 90 between the heat conduction substrate 11 and the cover body 30, the heat insulation layer 90 can be made of a material with good heat insulation performance. Under the action of the heat insulation layer 90, the heat generated by the heating film 13 can be effectively isolated from being released and radiated to the cover body 30, preventing the cover body 30 from being affected by the temperature of the heating structure 10, further improving the overall structural stability and reliability of the cover body assembly 100 and facilitating the use by users.

[0058] The present utility model also proposes a cooking appliance 500, which includes a pot body 200 and a cover body assembly 100. The specific structure of the cover body assembly 100 refers to the above embodiment. Since this cooking appliance 500 adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0059] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A heating structure is applied to a cooking appliance, characterized in that Comprising: A heat-conducting substrate, and A heating film, the heating film being connected to the surface of the heat-conducting substrate, the heating film being provided with at least two main body segments and at least one corner segment, any one of the corner segments connecting two adjacent main body segments, and the resistance of the corner segment being configured to be less than the resistance of the main body segment.

2. The heating structure according to claim 1, wherein Define the resistance value of the main body segment as R, and define the resistance value of the corner segment as R1, where 0.1 ≤ R1 / R ≤ 0.

5.

3. The heating structure according to claim 2, wherein The heating film is provided with a connection terminal, the connection terminal being connected to the main body segment, and the resistance of the connection terminal being configured to be less than the resistance setting of the main body segment.

4. The heating structure according to claim 3, characterized in that, Define the resistance value of the connection terminal as R2, where 0.1 ≤ R2 / R ≤ 0.

5.

5. The heating structure according to claim 1, characterized in that The heating structure further includes an insulating layer, the insulating layer being attached to the surface of the heat-conducting substrate and covering the heating film.

6. The heating structure according to any one of claims 1 to 5, characterized in that The heating film includes a substrate and a conductive coating, the conductive coating being attached to the outer surface of the substrate.

7. The heating structure according to claim 6, wherein The thickness of the conductive coating of the corner segment is greater than the thickness of the conductive coating of the main body segment.

8. The heating structure according to any one of claims 1 to 5, characterized in that, At least a part of the structure of the main body segment is set as an arc structure; and / or, the material of the heat-conducting substrate is glass.

9. A cover assembly, characterized in that, The lid assembly includes a lid body and a heating structure, the heating structure being the heating structure according to any one of claims 1 to 8, the heating structure being connected to the lid body, and the lid body being used to cover or open the pot body.

10. The cover assembly according to claim 9, characterized in that, The heating structure includes a heat-conducting substrate and a heating film, the lid assembly further includes a sealing ring, the sealing ring being arranged to surround the outer periphery of the heat-conducting substrate and connected to the lid body.

11. The cover assembly according to claim 10, wherein, The lid body is provided with a temperature measuring device, the heat-conducting substrate is provided with an avoidance hole, and the temperature measuring device passes through the avoidance hole; and / or, the lid assembly further includes a heat insulation layer, the heat insulation layer being arranged between the heat-conducting substrate and the lid body.

12. A cooking appliance, characterized in that, The cooking appliance includes a pot body and a lid assembly, the lid assembly being the lid assembly according to any one of claims 9 to 11, and the lid assembly being connected to the pot body.

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