Heat insulation seat, electric heating device and cooking utensil

Abstract

The utility model discloses a heat insulation seat, electric heating device and cooking utensil, relates to cooking utensil technical field, wherein the heat insulation seat comprises a seat body and a heat insulation structure, the seat body is provided with two opposite sides in its thickness direction, the two sides comprise a first side and a second side, the first side of the seat body is used for the installation of electric heating part; the heat insulation structure comprises a heat insulation layer located on at least one side of the base body, and the heat insulation layer is used for preventing heat of the electric heating part from being conducted in the direction of the second side of the base body. According to the technical scheme, the heat insulation effect of the heat insulation seat is improved.

Description

Technical Field

[0001] This utility model relates to the field of cooking utensil technology, and in particular to a heat insulation seat, an electric heating device, and a cooking utensil. Background Technology

[0002] In existing hybrid heating cooking appliances, the electric heating element generates a high temperature during operation, causing heat to be transferred towards the electromagnetic heating device. This not only wastes thermal energy but also affects the normal operation of the electromagnetic heating device. To address this, a heat insulation base can be placed between the electric heating element and the electromagnetic heating device, allowing the heat from the electric heating element to be transferred towards the electromagnetic heating device.

[0003] However, due to its manufacturing process and structural characteristics, the heat insulation base has a high internal porosity. Although the interconnection between these micropores promotes structural stability, it also leads to strong thermal convection under high temperature difference conditions, which reduces the heat insulation effect. Utility Model Content

[0004] The main purpose of this utility model is to provide a heat insulation seat, an electric heating device, and a cooking utensil, which aims to improve the heat insulation effect of the heat insulation seat.

[0005] To achieve the above objectives, this utility model proposes a heat insulation base for use in an electric heating device, comprising:

[0006] A base has two opposing sides in its thickness direction, the two sides including a first side and a second side, the first side of the base being used for mounting a power heating element;

[0007] The heat insulation structure includes a heat-insulating layer located on at least one side of the seat, the heat-insulating layer being used to block the heat from the electric heating element from being conducted to a second side of the seat.

[0008] In one embodiment, the heat insulation structure includes a reflective layer disposed on a surface of a first side of the seat, the reflective layer being used to reflect heat from the electric heating element toward the first side of the seat; and / or,

[0009] The seat is made of heat-insulating material.

[0010] In one embodiment, the reflective layer includes one of the following: a TiO2 reflective layer, a SiO2 reflective layer, a B2O3 reflective layer, an Al2O3 reflective layer, a ZnO reflective layer, a CaO reflective layer, and an Fe2O3 reflective layer; and / or,

[0011] The thickness of the reflective layer is ≥0.2mm.

[0012] In one embodiment, the thermal insulation structure includes a porous thermal insulation layer located on the second side of the seat.

[0013] In one embodiment, the porous insulation layer comprises one of the following: a glass fiber porous insulation layer, a silicate porous insulation powder layer, a nano-alumina porous insulation layer, and a nano-silica porous insulation layer; and / or,

[0014] The thickness of the porous insulation layer is ≥0.5mm.

[0015] In one embodiment, the electric heating device further includes a substrate located on the second side of the base, and the porous heat insulation layer is disposed on the substrate.

[0016] This utility model also proposes an electric heating device, comprising:

[0017] Mounting base with a mounting cavity open on one side;

[0018] A heat insulation seat is disposed within the mounting cavity, with the second side of the seat body facing the bottom of the mounting cavity, and the first side of the seat body facing the opening of the mounting cavity. The heat insulation seat includes a seat body and a heat insulation structure. The seat body has two opposing sides in its thickness direction, including a first side and a second side. The first side of the seat body is used for mounting a power heating element.

[0019] The heat insulation structure includes a heat-insulating layer located on at least one side of the base, the heat-insulating layer being used to block the heat from the electric heating element from being conducted to a second side of the base; and,

[0020] An electric heating element is installed on the first side of the base.

[0021] In one embodiment, the electric heating device further includes a substrate located on the second side of the base, and the porous heat insulation layer is disposed on the substrate;

[0022] The bottom of the mounting cavity is provided with a limiting groove opposite to the opening. The substrate is located in the limiting groove and is sandwiched between the second side of the base and the mounting base.

[0023] In one embodiment, the heat insulation structure includes a reflective layer disposed on a surface of a first side of the seat, the reflective layer being used to reflect the heat from the electric heating element toward the first side of the seat;

[0024] The electric heating element is embedded in the reflective layer.

[0025] In one embodiment, the electric heating element includes an infrared heating wire.

[0026] This utility model also proposes a cooking utensil, comprising:

[0027] The main body includes a panel, and a heating area is provided on the outer side of the panel;

[0028] An electric heating device, disposed within the main body, is used to heat a pot located in the heating area. The electric heating device includes:

[0029] Mounting base with a mounting cavity open on one side;

[0030] A heat insulation seat is disposed within the mounting cavity, with the second side of the seat body facing the bottom of the mounting cavity, and the first side of the seat body facing the opening of the mounting cavity. The heat insulation seat includes a seat body and a heat insulation structure. The seat body has two opposing sides in its thickness direction, including a first side and a second side. The first side of the seat body is used for mounting a power heating element.

[0031] The heat insulation structure includes a heat-insulating layer located on at least one side of the base, the heat-insulating layer being used to block the heat from the electric heating element from being conducted to a second side of the base; and,

[0032] An electric heating element is installed on the first side of the base;

[0033] At least two electric heating elements are provided, and the two electric heating elements are arranged in a partition;

[0034] An electromagnetic heating device is disposed within the main body. The electromagnetic heating device includes a first coil assembly disposed below the electric heating device. The electromagnetic field of the first coil assembly is capable of passing upwards through the electric heating device to electromagnetically heat a cookware placed in the heating area.

[0035] A control device is electrically connected to the electric heating device and the electromagnetic heating device, so as to at least control the two electric heating parts of the electric heating device to work independently, and control the operation of the electromagnetic heating device.

[0036] In one embodiment, the cooking appliance further includes the first coil assembly and at least one of the electric heating elements, which are at least partially misaligned.

[0037] The technical solution of this utility model, by placing the heat-insulating layer on at least one of the first and second sides of the base, can slow down the conduction of heat generated by the electric heating element during operation towards the second side of the base. This greatly reduces heat loss and unnecessary transfer, thereby improving the overall heat insulation effect of the heat-insulating base. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the structure of an embodiment of the heat insulation seat provided by this utility model;

[0040] Figure 2 for Figure 1 Another structural diagram of the heat insulation seat from another angle;

[0041] Figure 3 A schematic diagram of an embodiment of the electric heating device provided by this utility model;

[0042] Figure 4 for Figure 3 Side view of the electric heating device;

[0043] Figure 5 for Figure 3 Sectional view of AA;

[0044] Figure 6 for Figure 3 Exploded view of the electric heating device;

[0045] Figure 7 A schematic diagram of another embodiment of the electric heating device provided by this utility model;

[0046] Figure 8 for Figure 5 Enlarged view of the structure at point A in the middle;

[0047] Figure 9 for Figure 7 Partial cross-sectional view of the heating device;

[0048] Figure 10 A schematic diagram of the structure of an embodiment of the cooking utensil provided by this utility model;

[0049] Figure 11 This is a schematic diagram of the electric heating element and electromagnetic heating device projected onto the panel in this utility model.

[0050] Explanation of icon numbers:

[0051] 100. Heat-insulating base; 200. Electric heating device; 300. Cooking utensils;

[0052] 1. Seat; 11. First side; 12. Second side;

[0053] 2. Thermal insulation structure; 21. Thermal barrier layer; 211. Reflective layer; 212. Porous thermal insulation layer;

[0054] 3. Substrate;

[0055] 4. Mounting base; 41. Mounting cavity;

[0056] 5. Electric heating element;

[0057] 6. Main body; 61. Panel;

[0058] 7. Electromagnetic heating device; 71. First coil assembly.

[0059] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0060] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0061] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0062] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0063] In existing hybrid heating cooking appliances, the electric heating element generates a high temperature during operation, causing heat to be transferred towards the electromagnetic heating device. This not only wastes thermal energy but also affects the normal operation of the electromagnetic heating device. To address this, a heat insulation base can be placed between the electric heating element and the electromagnetic heating device, allowing the heat from the electric heating element to be transferred towards the electromagnetic heating device.

[0064] However, due to its manufacturing process and structural characteristics, the heat insulation base has a high internal porosity. Although the interconnection between these micropores promotes structural stability, it also leads to strong thermal convection under high temperature difference conditions, which reduces the heat insulation effect.

[0065] To solve the above technical problems, such as Figure 1 and Figure 2 As shown, this utility model proposes a heat-insulating seat 100 for use in an electric heating device 200, including a seat body 1 and a heat-insulating structure 2. The seat body 1 has two opposing sides in its thickness direction, the two sides including a first side 11 and a second side 12. The first side 11 of the seat body 1 is used for mounting the electric heating part 5. The heat-insulating structure 2 includes a heat-insulating layer 21 located on at least one side of the seat body 1. The heat-insulating layer 21 is used to block the heat of the electric heating part 5 from being conducted to the second side 12 of the seat body 1.

[0066] like Figure 8 As shown, the technical solution of this utility model, by placing the heat-insulating layer 21 on at least one of the first side 11 and the second side 12 of the base 1, can slow down the conduction of heat generated by the electric heating part 5 during operation towards the second side 12 of the base 1. This greatly reduces heat loss and unnecessary transmission, thereby improving the overall heat insulation effect of the heat insulation base 100.

[0067] It is understood that the heat insulation layer can be a poor conductor of heat (i.e., its thermal conductivity is less than that of the base 1), and the lower the thermal conductivity of the heat insulation layer, the better the heat insulation effect. However, materials with low thermal conductivity usually have some disadvantages, such as low strength and large differences in thermal expansion coefficients. Low strength makes them prone to deformation or damage under external forces, affecting their service life and structural stability. Large differences in thermal expansion coefficients can easily generate large stresses at the junctions with other materials when the temperature changes, which may lead to cracking, delamination, and other problems. Therefore, in one embodiment, the heat insulation structure 2 includes a reflective layer 211 disposed on the surface of the first side 11 of the base 1. The reflective layer 211 is used to reflect the heat generated by the electric heating element 5 toward the first side 11 of the base 1. With this configuration, the heat generated by the electric heating element 5 can be reflected back toward the first side 11 of the base 1 through the reflective layer 211, instead of being conducted to the second side 12 of the base 1. This differs from the aforementioned method of using the insulation layer as a poor conductor of heat to block heat conduction; instead, it achieves the insulation effect by reflecting heat. Through these two insulation mechanisms—namely, utilizing the insulation layer with low thermal conductivity to block heat conduction to the second side 12, and the reflective layer 211 reflecting heat back to the first side 11—heat loss and transfer can be reduced more effectively, further enhancing the overall insulation effect of the insulation base 100.

[0068] In one embodiment, the seat 1 is made of a heat-insulating material. This further reduces the transfer of heat from the electric heating element 5 to the second side 12 of the seat 1. It is understood that the seat 1 can be manufactured in various ways, such as injection molding, die casting, or machining. Specifically, the heat-insulating material includes heat-insulating powder, and may also contain added (reinforcing fibers, light-blocking agents, adhesives, etc.) and then bonded together under pressure to form a block. This allows for the rapid fulfillment of different quantities and specifications of the seat 1.

[0069] Different materials for the reflective layer 211 can be selected to improve the heat insulation effect according to specific application requirements and usage environment. Specifically, in one embodiment, the reflective layer 211 includes one of TiO2 reflective layer 211, SiO2 reflective layer 211, B2O3 reflective layer 211, Al2O3 reflective layer 211, ZnO reflective layer 211, CaO reflective layer 211, and Fe2O3 reflective layer 211. With this configuration, the TiO2 reflective layer 211 has a high refractive index and good optical properties, effectively reflecting light and heat within a specific wavelength range, thus playing a certain role in heat insulation. The SiO2 reflective layer 211 has high transparency and heat resistance, achieving good reflection while ensuring a certain level of light transmittance, making it suitable for heat insulation scenarios requiring a certain degree of light transmittance. The B2O3 reflective layer 211 has a low melting point and good chemical stability, maintaining stable reflection performance within a certain temperature range, making it suitable for occasions with special temperature requirements. The Al2O3 reflective layer 211 possesses high hardness and wear resistance, while also effectively reflecting heat, maintaining good thermal insulation performance even in harsh environments. The ZnO reflective layer 211 exhibits excellent ultraviolet shielding performance and a certain degree of reflectivity, reducing heat transfer while blocking ultraviolet rays. The CaO reflective layer 211 is relatively low-cost and can reflect heat to some extent, making it suitable for cost-sensitive applications. The Fe2O3 reflective layer 211 possesses certain infrared reflectivity, reflecting heat in the infrared band and contributing to improved overall thermal insulation.

[0070] Furthermore, it is worth mentioning that the aforementioned reflective layers 211 can be coated onto the surface of the first side 11 of the base 1 using a high-temperature spraying method. By allowing the raw materials to interact and fuse better under high-temperature conditions, a dense reflective layer 211 is generated. This dense structure not only helps to improve the reflection efficiency of the reflective layer 211 and reduce heat loss, but also effectively reduces the convection intensity. Reducing the convection intensity further prevents heat transfer and loss, thereby further improving the thermal insulation effect.

[0071] In one embodiment, the thickness of the reflective layer 211 is ≥0.2mm. This design ensures that the reflective layer 211 with a thickness greater than this not only has a better reflective effect but also enhances the strength of the reflective layer 211, reducing the likelihood of easy damage or deformation due to external forces or other factors, and improving the stability and durability of the reflective layer 211 during use.

[0072] It should be noted here that the seat 1 is typically made by uniformly mixing reinforcing fibers, heat-insulating powder, light-blocking agent, adhesive, etc., and then forming it into a block under pressure and bonding it together. Due to the manufacturing process and functional structure of the seat 1, the internal porosity of the seat 1 is high, but the micropores are interconnected, resulting in strong thermal convection under high temperature differences. The powder particles also have microscopic interconnections, maintaining a relatively high density and thus a high thermal conductivity. Figure 9 As shown, in one embodiment, the heat insulation structure 2 includes a porous heat insulation layer 212 located on the second side 12 of the seat 1. This arrangement, through the numerous tiny pores within the porous heat insulation layer 212, slows down the rapid transfer of heat, thereby reducing the rate of heat conduction from the first side 11 to the second side 12 of the seat 1, reducing heat loss, and further improving the overall heat insulation effect of the heat insulation seat 100.

[0073] Different porous insulation layer 212 materials can be selected to improve the insulation effect according to specific application requirements and usage environment. In one embodiment, the porous insulation layer 212 includes one of glass fiber wool porous insulation layer 212, silicate insulating powder porous insulation layer 212, nano-alumina porous insulation layer 212, and nano-silica porous insulation layer 212. With this configuration, the glass fiber wool porous insulation layer 212 has good insulation performance; its fibrous structure can effectively reduce heat conduction, while also possessing a certain degree of flexibility and temperature resistance. The silicate insulating powder porous insulation layer 212 utilizes the characteristics of silicate materials; its porous structure can store a large amount of air, which is an excellent insulating medium and can effectively reduce heat transfer. This material has low cost and is suitable for large-scale production. The nano-alumina porous insulation layer 212 has excellent high-temperature insulation performance; the nano-sized alumina particles can form a dense porous structure, resulting in better heat blocking effect. The nano-silica porous heat insulation layer 212 has good chemical stability and heat insulation performance. Its nano-sized silica particles can form a uniform porous structure, which has a better effect on heat reflection and blocking.

[0074] like Figure 8 As shown, in one embodiment, the thickness of the porous insulation layer 212 is ≥0.5mm. This setting ensures that the porous insulation layer 212 with a thickness greater than this not only has a better heat insulation effect, but also improves the strength of the porous insulation layer 212, reduces easy damage or deformation due to external forces or other factors, and enhances the stability and durability of the porous insulation layer 212 during use.

[0075] Because the strength of the base 1 made of heat-insulating powder is not high, in one embodiment, the electric heating device 200 further includes a substrate 3 located on the second side 12 of the base 1, and the porous heat-insulating layer 212 is disposed on the substrate 3. This arrangement allows the substrate 3 to support the base 1, and by attaching the second side 12 of the base 1 to the substrate 3, deformation or damage to the substrate 3 during use can be reduced, thereby improving the reliability and durability of the base 1. It is understood that the substrate 3 can be connected to the second side 12 of the base 1 in various ways, such as by bonding or snap-fitting.

[0076] like Figure 3 , Figure 4 as well as Figure 6 As shown, this utility model also proposes an electric heating device 200, which includes a mounting base 4, an electric heating element 5, and a heat insulation base 100. The specific structure of the heat insulation base 100 is as described in the above embodiments. Since this electric heating device 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The mounting base 4 has a mounting cavity 41 with an opening on one side. The heat insulation base 100 is disposed in the mounting cavity 41, and the second side 12 of the base body 1 is opposite to the bottom of the mounting cavity 41. The first side 11 of the base body 1 faces the opening of the mounting cavity 41, and the electric heating element 5 is mounted on the first side 11 of the base body 1.

[0077] In the above-described technical solution, the heat insulation seat 100 effectively blocks heat loss and concentrates heat in the desired area. Simultaneously, the electric heating element 5 is installed on the first side 11 of the seat body 1, enabling more efficient heat generation and transfer to the desired heating area, reducing heat waste and unnecessary heat loss. The opening provides a convenient passage for the heat insulation seat 100 to enter the mounting cavity 41, facilitating adjustment and installation of the heat insulation seat 100 within the mounting cavity 41.

[0078] like Figure 7As shown, in one embodiment, the electric heating device 200 further includes a substrate 3, which is located on the second side 12 of the base 1. The porous heat insulation layer 212 is disposed on the substrate 3. A limiting groove opposite to the opening is provided at the bottom of the mounting cavity 41. The substrate 3 is located in the limiting groove and is sandwiched between the second side 12 of the base 1 and the mounting base 4. This arrangement allows the limiting groove to accurately position the substrate 3, ensuring its accurate position within the mounting cavity 41. Simultaneously, the sandwiching of the substrate 3 between the second side 12 of the base 1 and the mounting base 4 enhances the stability and robustness of the entire structure, reducing the possibility of displacement or shaking of the substrate 3 during use. This also facilitates the alignment of the porous heat insulation layer 212 with the base 1 and the second side 12, thereby ensuring the heat insulation effect of the porous heat insulation layer 212 on the base 1 and improving the reliability of the electric heating device 200.

[0079] It is understandable that the electric heating element 5 can be installed on the reflective layer 211 in various ways. For example, it can be glued to the surface of the reflective layer 211 using a special adhesive, which is relatively simple. It can also be mechanically fixed, for example, using screws, bolts, or other connectors to fix the electric heating element 5 to the reflective layer 211. However, since the electric heating element 5 has a high operating temperature, adhesive bonding is prone to aging and reduces connection strength. Mechanical fixing involves additional mechanical parts, resulting in a larger area of ​​damage to the reflective layer 211. Therefore, in one embodiment, the heat insulation structure 2 includes a reflective layer 211 disposed on the surface of the first side 11 of the base 1. The reflective layer 211 reflects the heat from the electric heating element 5 to the first side 11 of the base 1; the electric heating element 5 is embedded in the reflective layer 211. This arrangement, by embedding the electric heating element 5 into the reflective layer 211, allows for a tighter bond, improving the stability and reliability of the overall structure. This embedded installation method reduces damage to the reflective layer 211 and also improves the aesthetics and overall appearance of the device. It is worth mentioning that when the reflective layer 211 is thin, or to further enhance the connection strength to the electric heating element 5, the embedding depth of the electric heating element 5 can be further increased, so that the electric heating element 5 can be embedded into the base 1.

[0080] It is understood that the electric heating element 5 can be of various types, such as a metal heating wire, a ceramic heating plate, or a PTC heating element. Specifically, in one embodiment, the electric heating element 5 includes an infrared heating wire. With this configuration, heating can be achieved using the radiation effect of infrared rays. Infrared rays have strong penetrating power and can quickly and evenly transfer heat to the surrounding environment or objects in contact with them, offering advantages such as faster heating speed and higher thermal efficiency compared to other types of heating elements.

[0081] like Figure 10 and Figure 11 As shown, this utility model also proposes a cooking utensil 300, which includes a main body 6, an electromagnetic heating device 7, and an electric heating device 200. The specific structure of the electric heating device 200 is as described in the above embodiments. Since the cooking utensil 300 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The main body 6 includes a panel 61, with a heating area on the outer side of the panel 61. An electric heating device 200 is disposed within the main body 6 and is used to heat a cookware placed in the heating area. At least two electric heating elements 5 are provided, arranged in a partitioned manner. An electromagnetic heating device 7 is disposed within the main body 6 and includes a first coil assembly 71 disposed below the electric heating device 200. The electromagnetic field of the first coil assembly 71 can pass upward through the electric heating device 200 to electromagnetically heat the cookware placed in the heating area. The cooking appliance 300 also includes a control device electrically connected to the electric heating device 200 and the electromagnetic heating device 7, enabling it to control at least the two electric heating elements 5 of the electric heating device 200 to operate independently and to control the operation of the electromagnetic heating device 7.

[0082] In the above-described technical solution, to ensure the heating performance of the electric heating device 200, the electric heating device 200 is positioned close to the heating area of ​​the panel 61, so that the two electric heating elements 5 are close to the heating area. When the cooking appliance 300 needs to switch to a mixed heating mode to perform mixed heating on the heating area on the panel 61, the control device controls the first coil assembly 71 to be energized. The first coil assembly 71 operates and generates an electromagnetic field. The electromagnetic field generated by the first coil assembly 71 can pass upward through the electric heating device 200 to couple with the pot in the heating area, providing electromagnetic heating to the heating area. At the same time, the control device controls one of the two electric heating elements 5 to work independently. This allows some or all of the electric heating elements 5 to reduce their power or stop working when the cooking appliance 300 overheats, thereby reducing the impact of the temperature of the electric heating device 200 on the first coil assembly 71. This allows for flexible adjustment of the ratio of electromagnetic heating and electric heating according to different cooking needs, achieving more precise temperature control and heating effect.

[0083] Furthermore, to further protect the first coil assembly 71 from overheating, in one embodiment, the cooking appliance 300 is also equipped with a temperature probe. This allows the temperature probe to detect the temperature inside the main body 6. When the temperature of the first coil assembly 71 is too high, the heating power of the electric heating element 5 is reduced or stopped, reducing the heat transfer from the electric heating element 5 to the first coil assembly 71 through the heat insulation seat 100. This causes the temperature of the first coil assembly 71 to drop, thereby mitigating the overheating problem caused by the heat transferred downwards from the electric heating device 200 combined with the heat generated by the first coil assembly 71 itself. The temperature probe can be a thermocouple or an NTC thermistor. The temperature probe can be inserted into or installed in an insulating terminal block. In one embodiment, the cooking appliance 300 can also be equipped with a temperature control switch. This switch can automatically cut off the current to the electric heating element 200 and / or the electromagnetic heating device 7 when the first coil assembly 71 overheats, quickly reducing the energy supply to the heat source and preventing further deterioration of the overheating situation. This effectively prevents the first coil assembly 71 from being damaged by prolonged overheating. The temperature control switch can be either single-trigger (irreversible) or multiple-trigger (cyclically reversible). In a single-trigger configuration, after detecting overheating of the first coil assembly 71 and triggering a current cutoff, it will remain in the off state until the fault is resolved, unless manual intervention or replacement of the switch is required. In a multiple-trigger configuration, after detecting overheating of the first coil assembly 71 and cutting off the current, it can automatically reconnect the current and restore normal operation after a certain cooling time or when specific conditions are met. The selection of different types of temperature control switches depends on the specific design requirements of the cooking appliance 300.

[0084] Furthermore, to better control the operation of the two electric heating elements 5 and the first coil assembly 71, in one embodiment, the first coil assembly 71 is at least partially offset from at least one of the electric heating elements 5. This offset arrangement ensures that only a portion of the heat generated by the electric heating elements 5 during operation is conducted to the surface of the first coil assembly 71. This reduces the impact of the electric heating device 200 on the temperature rise of the first coil assembly 71, thereby mitigating the overheating problem caused by the heat transferred downwards from the electric heating device 200 combined with the heat generated by the first coil assembly 71 itself. This reduces the probability of damage to the insulation layer of the first coil assembly 71, protecting it from burnout while simultaneously increasing the heating power of the cooking appliance 300.

[0085] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A heat insulation base for use in an electric heating device, characterized in that, include: A base has two opposing sides in its thickness direction, the two sides including a first side and a second side, the first side of the base being used for mounting a power heating element; The heat insulation structure includes a heat-insulating layer located on at least one side of the seat, the heat-insulating layer being used to block the heat from the electric heating element from being conducted to a second side of the seat.

2. The heat insulation seat as described in claim 1, characterized in that, The heat insulation structure includes a reflective layer disposed on a surface of the first side of the seat, the reflective layer being used to reflect the heat from the electric heating element toward the first side of the seat; and / or, The seat is made of heat-insulating material.

3. The heat insulation seat as described in claim 2, characterized in that, The reflective layer includes one of the following: TiO2 reflective layer, SiO2 reflective layer, B2O3 reflective layer, Al2O3 reflective layer, ZnO reflective layer, CaO reflective layer, and Fe2O3 reflective layer; and / or, The thickness of the reflective layer is ≥0.2mm.

4. The heat insulation seat as described in any one of claims 1 to 3, characterized in that, The thermal insulation structure includes a porous thermal insulation layer located on the second side of the seat.

5. The heat insulation seat as described in claim 4, characterized in that, The porous insulation layer includes one of the following: a glass fiber porous insulation layer, a silicate porous insulation powder layer, a nano-alumina porous insulation layer, and a nano-silica porous insulation layer; and / or, The thickness of the porous insulation layer is ≥0.5mm.

6. The heat insulation seat as described in claim 4, characterized in that, The electric heating device also includes a substrate, which is located on the second side of the base, and the porous heat insulation layer is disposed on the substrate.

7. An electric heating device, characterized in that, include: Mounting base with a mounting cavity open on one side; A heat insulation seat is disposed within the mounting cavity, with a second side of the seat body opposite to the bottom of the mounting cavity, and a first side of the seat body facing the opening of the mounting cavity. The heat insulation seat includes the type claimed in any one of claims 1 to 6; and... An electric heating element is installed on the first side of the base.

8. The electric heating device as described in claim 7, characterized in that, The electric heating device further includes a substrate, which is located on the second side of the base, and the porous heat insulation layer is disposed on the substrate; The bottom of the mounting cavity is provided with a limiting groove opposite to the opening. The substrate is located in the limiting groove and is sandwiched between the second side of the base and the mounting base.

9. The electric heating device as described in claim 7, characterized in that, The heat insulation structure includes a reflective layer disposed on the surface of the first side of the seat, the reflective layer being used to reflect the heat from the electric heating element toward the first side of the seat; The electric heating element is embedded in the reflective layer.

10. The electric heating device as described in claim 7, characterized in that, The electric heating element includes an infrared heating wire.

11. A cooking utensil, characterized in that, include: The main body includes a panel, and a heating area is provided on the outer side of the panel; An electric heating device is disposed within the main body. The electric heating device is used to heat a pot located in the heating area. The electric heating device is the electric heating device as described in any one of claims 7 to 10. At least two electric heating parts are provided, and the two electric heating parts are arranged in a partitioned manner. An electromagnetic heating device is disposed within the main body. The electromagnetic heating device includes a first coil assembly disposed below the electric heating device. The electromagnetic field of the first coil assembly can pass upward through the electric heating device to electromagnetically heat the cookware placed in the heating area. as well as, A control device is electrically connected to the electric heating device and the electromagnetic heating device, so as to at least control the two electric heating parts of the electric heating device to work independently, and control the operation of the electromagnetic heating device.

12. A cooking utensil as described in claim 11, characterized in that, The first coil assembly is at least partially misaligned with at least one of the electric heating elements.

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