Heating assembly, non-metallic container and cooking appliance

Abstract

The application provides a heating assembly, a non-metal container and a cooking appliance. The heating assembly comprises a non-metal substrate and a magnetosensitive layer. The magnetoresistance of the magnetosensitive layer is 0.1 mΩ-7 mΩ. Compared with the heating mode in the prior art, in which the heating is performed on the electric heating plate arranged on the kettle body, the magnetosensitive layer is used as the heating source in the technical scheme, the heating source can heat the materials in the accommodation space, the heat exchange speed between the heating source and the materials is improved, and the heating efficiency of the container is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cooking utensils, in particular, relates to a heating assembly, a non-metal container and a cooking utensil. BACKGROUND

[0002] The non-metal kettle has good light transmittance and food contact safety. In the prior art, a low-power heating tube is used to heat the glass kettle, resulting in slow heating speed of the glass kettle. SUMMARY

[0003] The present application aims to solve one of the problems in the prior art or related art.

[0004] To this end, a first aspect of the present application provides a heating assembly.

[0005] A second aspect of the present application provides a non-metal container.

[0006] A third aspect of the present application provides a cooking utensil.

[0007] Therefore, according to the first aspect of the present application, a heating assembly is provided, comprising: a non-metal substrate, a magnetosensitive layer, the sheet resistance of the magnetosensitive layer is in the range of 0.1 mΩ to 7 mΩ.

[0008] The heating assembly provided by the present application comprises a non-metal substrate and a magnetosensitive layer. The magnetosensitive layer is arranged on the non-metal substrate, the magnetosensitive layer comprises a magnetosensitive metal material, the magnetosensitive layer is a magnetic induction heating source, and the magnetosensitive layer can generate heat under the action of a magnetic field. Compared with the heating mode in the prior art, in which the heating is performed on the electric heating plate arranged on the kettle body, in the present technical solution, the magnetosensitive layer serves as the heating source, the heating source can heat the material in the accommodation space, thereby improving the heat exchange speed between the heating source and the material and the heating efficiency of the container.

[0009] In the present application, the sheet resistance of the magnetosensitive layer is in the range of 0.1 mΩ to 7 mΩ. Since the thermal conductivity of the non-metal container is low, too high heat is easy to accumulate on the non-metal substrate. Therefore, the sheet resistance of the magnetosensitive layer is limited in the above range, on the one hand, the electrical conductivity of the magnetosensitive layer is improved, and on the other hand, the thermal conductivity of the non-metal substrate itself is taken into account, thereby avoiding the problem of too high heat caused by too small sheet resistance of the magnetosensitive layer, and the risk of rupture caused by too high internal stress of the non-metal substrate.

[0010] Further preferably, the sheet resistance of the magnetosensitive layer is in the range of 0.1 mΩ to 3.5 mΩ.

[0011] By setting the sheet resistance of the magnetic induction layer in the above range, the conductive capacity of the magnetic induction layer can be further improved, thereby improving the heating power of the heating assembly. Since the thermal resistance of the non-metal substrate is high, the heat generated by the magnetic induction layer is difficult to uniformly transmit in the non-metal substrate, and hot spots are easily formed, thereby causing the rupture of the non-metal substrate. By limiting the sheet resistance of the magnetic induction layer in the above range, the heating power of the heating assembly is high, thereby improving the heat flow in the non-metal substrate, reducing the difference in heat between each part, reducing the formation of hot spots, and improving the heat resistance of the non-metal substrate.

[0012] In addition, the heating assembly in the above technical solution provided by the application can further have the following additional technical features.

[0013] In a possible design, the porosity of the magnetic induction layer is 1% to 20%, and / or the thickness of the magnetic induction layer is 10 um to 150 um.

[0014] In this design, by adjusting the resistance value of the sheet resistance of the magnetic induction layer in the above range, the maximum heating power of the container can be adjusted. In the above range, the smaller the sheet resistance of the magnetic induction layer is set, the greater the power of the container is.

[0015] By setting the porosity of the magnetic induction layer to 1% to 20%, on the one hand, the sheet resistance of the magnetic induction layer can be reduced, and the heating efficiency can be improved, and on the other hand, the improvement of the heating power caused by the reduction of the sheet resistance and the heat resistance of the non-metal substrate can be considered. By setting the porosity of the magnetic induction layer in the above range, the sheet resistance of the magnetic induction layer can not be too small, and the possibility of rupture of the non-metal substrate caused by excessive heat generated by the magnetic induction layer can be reduced.

[0016] The porosity of the magnetic induction layer is preferably 1-10%, and by setting the porosity of the magnetic induction layer to 1% to 10%, the uniformity of the heating of the non-metal substrate can also be improved, and the possibility of rupture of the non-metal substrate can also be reduced.

[0017] It is worth mentioning that the magnetic sensitive layer is arranged on the non-metal substrate by spraying. Alternatively, a metal slurry is prepared and arranged on the non-metal substrate by coating. The magnetic sensitive layer is arranged on the non-metal substrate by arc spraying or low-pressure cold spraying. The porosity of the magnetic sensitive layer arranged on the non-metal substrate can be controlled within the above range, which ensures the heating efficiency of the heating assembly and reduces the possibility of cracking of the non-metal substrate. The thickness of the magnetic sensitive layer is greater than or equal to 10 microns and less than or equal to 150 microns. Since the thickness of the magnetic sensitive layer is related to the square resistance of the magnetic sensitive layer, the thickness of the magnetic sensitive layer is arranged within the above range, which can ensure that the square resistance of the magnetic sensitive layer is within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the magnetic sensitive layer is too large, the current will flow on the surface of the magnetic sensitive layer, which will increase the resistance of the magnetic sensitive layer and reduce the heating power. A higher porosity will also reduce the heating power. The thickness of the magnetic sensitive layer is arranged within the range of 10 microns to 150 microns, which can greatly improve the heating power of the heating assembly. In addition, the improvement of the heating power due to the reduction of the thickness also avoids the possibility of cracking of the non-metal substrate caused by excessive heating of the magnetic sensitive layer.

[0018] While ensuring that the thickness of the magnetic sensitive layer is within the above range, a certain porosity is arranged on the magnetic sensitive layer, which can prevent the square resistance from being too small and reduce the possibility of cracking of the non-metal substrate. Furthermore, it can also improve the uniformity of the heating of the non-metal substrate and reduce the possibility of cracking of the non-metal substrate.

[0019] The thickness of the magnetic sensitive layer is preferably 60 microns to 80 microns. By arranging the thickness of the magnetic sensitive layer within the range of 60 microns to 80 microns, the square resistance of the magnetic sensitive layer can be reduced, the possibility of cracking of the non-metal substrate can be reduced, and the non-metal substrate can be heated more uniformly.

[0020] It is worth mentioning that not only the porosity of the magnetic sensitive layer affects the square resistance of the magnetic sensitive layer, but also the thickness and purity of the magnetic sensitive layer affect the square resistance. After determining the set square resistance of the magnetic sensitive layer, the higher the purity and the lower the porosity of the magnetic sensitive layer, the thinner the magnetic sensitive layer can be arranged. The lower the purity and the higher the porosity of the magnetic sensitive layer, the thicker the magnetic sensitive layer can be arranged. On this basis, the thickness, porosity and purity of the magnetic sensitive layer can be reasonably arranged, so as to reasonably arrange the porosity and purity of the magnetic sensitive layer under the premise of ensuring the square resistance of the magnetic sensitive layer, thereby reducing the processing difficulty and cost of the container.

[0021] In one possible design, the magnetic field induction resistance of the magnetic sensitive layer is 2Ω to 5Ω; and / or the inductance of the magnetic sensitive layer is 70uH to 80uH.

[0022] In the design, the value range of the magnetic field induction resistance of the magnetic layer is limited, which can ensure the heating efficiency of the magnetic layer in the magnetic field. The induction resistance of the magnetic layer increases with the increase of the thickness of the magnetic layer, and when the thickness range of the magnetic layer is greater than the first preset thickness, the induction resistance of the magnetic layer decreases with the increase of the thickness of the magnetic layer. By limiting the magnetic induction resistance of the magnetic layer, the ability of the magnetic layer to induce a magnetic field is improved, and by limiting the sheet resistance of the magnetic layer, the electrical conductivity of the magnetic layer is improved. By limiting the magnetic induction resistance of the magnetic layer and the sheet resistance of the magnetic layer, the electrical conductivity and the magnetic induction ability of the magnetic layer are improved, thereby further improving the heating efficiency of the heating assembly. The value range of the inductance of the magnetic layer is set to 70uH to 80uH, which further improves the induction ability of the magnetic layer to the magnetic field, and by limiting the inductance of the magnetic layer and the sheet resistance of the magnetic layer, the heating efficiency of the heating assembly can be improved.

[0023] In a possible design, the magnetic layer includes a weak magnetic metal material; wherein the relative magnetic permeability of the weak magnetic metal material is less than 1.

[0024] In the design, the material of the magnetic layer includes a weak magnetic metal material, and the relative magnetic permeability of the weak magnetic metal material is less than 1. The metal magnetic layer can quickly heat up under the action of the magnetic field, which has the advantage of fast heating speed compared with the existing technology of conducting heat through the container.

[0025] In a possible design, the weak magnetic metal material is aluminum, and the magnetic layer is an aluminum magnetic layer; wherein the porosity of the aluminum magnetic layer is in the range of 1% to 20%, and / or the thickness of the aluminum magnetic layer is in the range of 40um to 150um.

[0026] In the design, when the weak magnetic metal material in the magnetic layer is selected as aluminum, i.e. the magnetic layer is selected as an aluminum magnetic layer. The porosity of the aluminum magnetic layer is set to 1% to 20%, and / or the value range of the thickness of the aluminum magnetic layer is set to 40um to 150um.

[0027] By setting the porosity of the aluminum magnetic layer to 1% to 20%, on the one hand, the sheet resistance of the aluminum magnetic layer can be reduced to improve the heating efficiency, and on the other hand, the reduction of the sheet resistance can improve the heating power and the heat resistance of the non-metal substrate. By setting the porosity of the aluminum magnetic layer in the above range, the sheet resistance of the aluminum magnetic layer will not be too small, which reduces the possibility of the non-metal substrate being broken due to excessive heating of the aluminum magnetic layer.

[0028] The preferred range of the porosity of the aluminum magnetic layer is 1% to 10%. By setting the porosity of the aluminum magnetic layer to 1% to 10%, the uniformity of the heating of the non-metal substrate can also be improved, which also reduces the possibility of the non-metal substrate being broken.

[0029] The thickness of the aluminum magnetic layer is set to be greater than or equal to 40 microns and less than or equal to 150 microns. Since the thickness of the aluminum magnetic layer is related to the sheet resistance of the aluminum magnetic layer, setting the thickness of the aluminum magnetic layer in the above range can ensure that the sheet resistance of the aluminum magnetic layer is within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the aluminum magnetic layer is too large, it will cause the current to flow on the surface of the aluminum magnetic layer, increase the resistance of the magnetic layer, reduce the heating power, and also cause the porosity to be high. The high porosity will also reduce the heating power. The present application sets the thickness of the aluminum magnetic layer to be between 40 microns and 150 microns, which can greatly improve the heating power of the heating assembly. In addition, due to the increase in heating power caused by the reduction in thickness, the possibility of rupture of the non-metallic substrate caused by excessive heat generated by the aluminum magnetic layer is also avoided.

[0030] While ensuring that the thickness of the aluminum magnetic layer is within the above range, a certain porosity is set for the aluminum magnetic layer, which can prevent the sheet resistance from being too small and reduce the possibility of rupture of the non-metallic substrate. Furthermore, it can also improve the uniformity of the heating of the non-metallic substrate, thereby also reducing the possibility of rupture of the non-metallic substrate.

[0031] The thickness of the aluminum magnetic layer is preferably set to be between 60 microns and 80 microns. By setting the thickness of the aluminum magnetic layer to be between 60 microns and 80 microns, not only can the sheet resistance of the magnetic layer be reduced, but also the possibility of rupture of the non-metallic substrate can be reduced, and the non-metallic substrate can be heated more uniformly.

[0032] It is worth noting that during the preparation of the aluminum magnetic layer, a slurry containing metallic aluminum can be prepared first, and the aluminum magnetic layer can be prepared by coating the slurry containing metallic aluminum on the non-metallic substrate.

[0033] Alternatively, pure metallic aluminum can be directly applied to the non-metallic substrate by spraying to complete the preparation of the aluminum magnetic layer.

[0034] In one possible design, the weak magnetic metal material is copper, and the magnetic layer is a copper magnetic layer. The porosity of the copper magnetic layer is set to be between 1% and 20%, and / or the thickness of the copper magnetic layer is set to be between 10 microns and 80 microns.

[0035] In this design, when the weak magnetic metal material in the magnetic layer is selected as copper, i.e. the magnetic layer is selected as a copper magnetic layer. The porosity of the copper magnetic layer is set to be between 1% and 20%, and / or the thickness of the copper magnetic layer is set to be between 10 microns and 80 microns.

[0036] By setting the porosity of the copper magnetic layer to be 1% to 20%, on the one hand, the copper magnetic layer's sheet resistance can be reduced, and the heating efficiency can be improved; on the other hand, the heating power brought by the reduction of the sheet resistance and the heat resistance of the non-metal substrate can be considered. By setting the porosity of the copper magnetic layer to be in the above range, the sheet resistance of the copper magnetic layer can not be too small, and the possibility of the non-metal substrate being broken due to excessive heating of the copper magnetic layer can be reduced.

[0037] The porosity of the copper magnetic layer is preferably 1% to 10%. By setting the porosity of the copper magnetic layer to be 1% to 10%, the uniformity of the heating of the non-metal substrate can be improved, and the possibility of the non-metal substrate being broken can also be reduced.

[0038] The thickness of the copper magnetic layer is set to be greater than or equal to 10 microns and less than or equal to 80 microns. Since the thickness of the copper magnetic layer is related to the sheet resistance of the copper magnetic layer, by setting the thickness of the copper magnetic layer to be in the above range, the sheet resistance of the copper magnetic layer can be ensured to be within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the copper magnetic layer is too large, the current will flow on the surface of the copper magnetic layer, which will increase the resistance of the magnetic layer, reduce the heating power, and also cause the porosity to be high. Higher porosity will also reduce the heating power. The thickness of the copper magnetic layer is set to be between 10 microns and 80 microns, which can greatly improve the heating power of the heating assembly, and the increase in heating power due to the reduction in thickness also avoids the possibility of the non-metal substrate being broken due to excessive heating of the copper magnetic layer.

[0039] By setting the porosity of the copper magnetic layer to be in the above range while ensuring that the thickness of the copper magnetic layer is within the above range, the sheet resistance can not be too small, and the possibility of the non-metal substrate being broken can be reduced; further, the uniformity of the heating of the non-metal substrate can be improved, and the possibility of the non-metal substrate being broken can also be reduced.

[0040] The thickness of the copper magnetic layer is set to be greater than or equal to 10 microns and less than or equal to 80 microns. Since the thickness of the copper magnetic layer is related to the sheet resistance of the copper magnetic layer, by setting the thickness of the copper magnetic layer to be in the above range, the sheet resistance of the copper magnetic layer can be ensured to be within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the copper magnetic layer is too large, the current will flow on the surface of the copper magnetic layer, which will increase the resistance of the magnetic layer, reduce the heating power, and also cause the porosity to be high. Higher porosity will also reduce the heating power. The thickness of the copper magnetic layer is set to be between 10 microns and 80 microns, which can greatly improve the heating power of the heating assembly, and the increase in heating power due to the reduction in thickness also avoids the possibility of the non-metal substrate being broken due to excessive heating of the copper magnetic layer.

[0041] In one possible design, the weak magnetic metal material is silver, and the magnetic layer is a silver magnetic layer; wherein the porosity of the silver magnetic layer is 1% to 10%, and / or the thickness of the silver magnetic layer is 5um to 35um.

[0042] In the design, when the weak magnetic metal material in the magnetic sensitive layer is selected as silver, that is, the magnetic sensitive layer is selected as a silver magnetic sensitive layer. The porosity of the silver magnetic sensitive layer is set to 1% to 10%, and / or the thickness of the silver magnetic sensitive layer is set to 5um to 35um.

[0043] By setting the porosity of the silver magnetic sensitive layer to 1% to 10%, on the one hand, the sheet resistance of the silver magnetic sensitive layer can be reduced to improve the heating efficiency, and on the other hand, the heating power brought by the reduction of the sheet resistance and the heat resistance of the non-metal substrate can be considered. By setting the porosity of the silver magnetic sensitive layer in the above range, the sheet resistance of the silver magnetic sensitive layer cannot be too small, which reduces the possibility of rupture of the non-metal substrate due to excessive heating of the silver magnetic sensitive layer.

[0044] The preferred range of the porosity of the silver magnetic sensitive layer is 1% to 5%. By setting the porosity of the silver magnetic sensitive layer to 1% to 5%, the uniformity of the heating of the non-metal substrate can also be improved, and the possibility of rupture of the non-metal substrate is also reduced.

[0045] The thickness of the silver magnetic sensitive layer is set to be greater than or equal to 5 microns and less than or equal to 35 microns. Since the thickness of the silver magnetic sensitive layer is related to the sheet resistance of the silver magnetic sensitive layer, setting the thickness of the silver magnetic sensitive layer in the above range can ensure that the sheet resistance of the silver magnetic sensitive layer is within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the silver magnetic sensitive layer is too large, the current will flow on the surface of the silver magnetic sensitive layer, which will increase the resistance of the magnetic sensitive layer and reduce the heating power. A higher porosity will also reduce the heating power. The present application sets the thickness of the silver magnetic sensitive layer to be between 5 microns and 35 microns, which can greatly improve the heating power of the heating assembly. Due to the increase in heating power caused by the reduction in thickness, the possibility of rupture of the non-metal substrate caused by excessive heating of the silver magnetic sensitive layer is also avoided.

[0046] By setting the porosity of the silver magnetic sensitive layer to be greater than or equal to 5 microns and less than or equal to 35 microns, the sheet resistance cannot be too small, and the possibility of rupture of the non-metal substrate is reduced; further, the uniformity of the heating of the non-metal substrate can also be improved, and the possibility of rupture of the non-metal substrate is also reduced.

[0047] The preferred range of the thickness of the silver magnetic sensitive layer is 10 microns to 20 microns. By setting the thickness of the silver magnetic sensitive layer to be between 10 microns and 20 microns, the sheet resistance of the magnetic sensitive layer can be reduced, the possibility of rupture of the non-metal substrate can be reduced, and the non-metal substrate can be heated more uniformly.

[0048] It is worth noting that in the process of preparing the silver magnetic sensitive layer, a slurry containing metallic silver can be prepared first, and then the slurry containing metallic silver is coated on the non-metal substrate to complete the preparation of the silver magnetic sensitive layer.

[0049] The pure silver metal can also be directly arranged on the non-metal substrate by spraying to complete the preparation of the silver magnetic sensitive layer.

[0050] In a possible design, the sheet resistance of the magnetic sensitive layer ranges from 0.1 mΩ to 3.5 mΩ.

[0051] In this design, the sheet resistance of the magnetic sensitive layer is limited, so that the magnetic sensitive layer can generate heat through the resistance under the action of the alternating magnetic field, thereby improving the heating effect of the glass container.

[0052] By setting the sheet resistance of the magnetic sensitive layer in the above range, the conductivity of the magnetic sensitive layer can be further improved, thereby improving the heating power of the heating assembly. Since the non-metal substrate has high thermal resistance, the heat generated by the magnetic sensitive layer is difficult to uniformly transmit in the non-metal substrate, which is easy to form hot spots, thereby causing the rupture of the non-metal substrate. By limiting the sheet resistance of the magnetic sensitive layer in the above range, the heating power of the heating assembly is higher, thereby improving the flow of heat in the non-metal substrate, reducing the difference in heat between each part, reducing the formation of hot spots, and improving the heat resistance of the non-metal substrate.

[0053] In a possible design, the content of the weak magnetic metal material in the magnetic sensitive layer ranges from 60% to 90%.

[0054] In this design, the magnetic sensitive layer can be formed by mixing the weak magnetic metal material and other materials, wherein the weak magnetic metal material can be silver, copper, aluminum, etc. The content of the weak magnetic metal material is limited.

[0055] It can be understood that the heating power of the magnetic sensitive layer is not only related to the type of material, the thickness and porosity of the magnetic sensitive layer, but also related to the content of the weak magnetic metal material. In order to meet the actual needs, for example, in the design of the container, the material, thickness and porosity of the magnetic sensitive layer have been designed accordingly. In order to meet the design requirements, the content of the weak magnetic metal material in the magnetic sensitive layer can be adjusted, thereby ensuring that the heating efficiency of the magnetic sensitive layer in the magnetic field meets the requirements under the premise of meeting the design requirements.

[0056] In a possible design, the magnetic sensitive layer further includes an inorganic substance; the inorganic substance includes one or more of aluminum oxide, silicon oxide, boron oxide, bismuth oxide and calcium oxide.

[0057] In this design, the magnetic sensitive layer not only includes the aforementioned weak magnetic metal material, but also includes an inorganic substance. The inorganic substance can be one or more of aluminum oxide, silicon oxide, boron oxide, potassium oxide, bismuth oxide and calcium oxide.

[0058] In one of the technical solutions, the content of the weak magnetic metal ranges from 60% to 90%, and the content of the inorganic substance ranges from 10% to 40%.

[0059] In some embodiments, the weak magnetic metal material and the inorganic substance can be mixed into a coating, and the mixed coating is arranged on the non-metal substrate by thermal spraying.

[0060] In a possible design, the heating assembly further includes a protective layer arranged on an outer surface of the magnetic sensitive layer to seal the magnetic sensitive layer, and a sintering temperature of the protective layer is less than 600 DEG C.

[0061] In this design, the heating assembly further includes a protective layer covering the magnetic sensitive layer to seal and protect the protective layer.

[0062] Since the magnetic sensitive layer is arranged in the containing cavity of the container, the protective layer structure can avoid the direct contact between the material in the containing cavity and the magnetic sensitive layer, thereby slowing down the oxidation speed of the magnetic sensitive layer and improving the durability of the magnetic sensitive layer. The area of the magnetic sensitive layer is less than the area of the non-metal substrate, and the magnetic sensitive layer is located in the middle of the non-metal substrate, and a gap is arranged between the edge side walls of the magnetic sensitive layer. By arranging the magnetic sensitive layer at the middle position of the non-metal substrate and keeping a certain distance between the magnetic sensitive layer and the edge of the non-metal substrate, the protective layer can cover the outer surface of the magnetic sensitive layer in all directions. The upper surface and the side surface of the magnetic sensitive layer are covered by the protective layer, and the bottom surface of the magnetic sensitive layer is connected with the non-metal substrate, so that each part of the magnetic sensitive layer is not directly exposed to the containing cavity, and the influence of the oxidation of the magnetic sensitive layer on the material in the containing cavity is also avoided.

[0063] When the protective layer is arranged on the magnetic sensitive layer, the protective layer is arranged on the magnetic sensitive layer by sintering. By limiting the sintering temperature of the protective layer to be less than or equal to 600 DEG C, the influence of sintering on the magnetic sensitive layer is reduced, so that the damage of the magnetic sensitive layer is avoided, and the influence of the sintered protective layer on the bonding strength between the non-metal substrate and the magnetic sensitive layer is also reduced, thereby improving the heating effect of the container on the material.

[0064] In a possible design, the protective layer includes a polytetrafluoroethylene coating, a ceramic coating, or a silicone coating, or a glass glaze layer.

[0065] In this design, polytetrafluoroethylene, ceramic and silicone are all high-stability food-grade coatings, that is, the polytetrafluoroethylene coating, the ceramic coating and the silicone coating have strong stability in a high-temperature environment and will not disperse into the material to be heated in the container, so as to avoid the pollution of the material to be heated in the containing space during the heating and cooking process, and improve the stability of the container. By arranging the polytetrafluoroethylene coating, the ceramic coating or the silicone coating as the protective coating, the contact between the magnetic sensitive layer and the material in the containing space can be avoided, and the reaction of the protective layer itself with the material after the contact can also be avoided, thereby improving the user experience.

[0066] In some embodiments, the protective layer has a thickness greater than or equal to 15 microns and less than or equal to 40 microns.

[0067] In these embodiments, the thickness of the protective layer is set to be between 40 microns and 80 microns, so that the thickness of the protective layer is within an appropriate range, avoiding the problem of increased processing difficulty and easy breakage of the protective layer due to the thickness of the protective layer being too small. The problem of affecting heating efficiency and resource waste due to the thickness of the protective layer being too large is also avoided.

[0068] According to a second aspect of the present application, a non-metal container is provided, comprising a heating assembly and a side wall in any of the possible designs of the first aspect described above. The side wall is connected to a non-metal base plate by welding or bonding, and the non-metal base plate and the side wall enclose a containing cavity, and the magnetic sensitive layer is located inside the containing cavity. The non-metal container provided by the present application is provided with a side wall and a heating assembly. The non-metal base plate in the heating assembly serves as the bottom plate of the non-metal container, and the side wall encloses a containing cavity. The containing cavity formed by the side wall has two open ends, and the non-metal base plate is connected to the side wall to block one of the two open ends, thereby forming a containing cavity that can store materials to be heated. The non-metal base plate and the side wall are connected by welding or bonding. During the production and processing of the container, the magnetic sensitive layer can be first arranged on the non-metal base plate, and then the non-metal base plate and the side wall are assembled together by welding or bonding, thereby simplifying the container preparation process.

[0069] The magnetic sensitive layer is arranged inside the containing cavity, and the magnetic sensitive layer can directly contact the materials in the containing cavity. The magnetic sensitive layer generates heat under the action of a magnetic field. Since the magnetic sensitive layer directly contacts the materials, heat transfer through the non-metal base plate is not required, thereby improving the heating efficiency of the container for the materials.

[0070] The lower surface of the non-metal base plate is a flat surface. The container can be placed on a base through the non-metal base plate, and the base is provided with an electromagnetic heating device capable of generating a magnetic field. The electromagnetic heating device can generate a magnetic field in an energized state. The magnetic sensitive layer is arranged on the non-metal base plate of the container, and the magnetic sensitive layer can generate heat under the action of a magnetic field to heat the materials to be heated stored in the containing cavity.

[0071] In one possible design, the edge of the magnetic sensitive layer has a predetermined distance from the edge of the non-metal base plate.

[0072] In this design, a predetermined distance is provided between the magnetic sensitive layer and the side wall, so that the magnetic sensitive layer and the side wall have a certain distance, which can avoid the problem of cracking of the magnetic sensitive layer caused by the contact between the magnetic sensitive layer and the side wall.

[0073] The edge of the magnetic sensitive layer is spaced apart from the edge of the non-metal substrate by a preset interval, so that the magnetic sensitive layer is less affected by the welding operation when the non-metal substrate is welded with the side wall, and damage to the magnetic sensitive layer is avoided, and the influence of the welding operation on the bonding strength between the non-metal substrate and the magnetic sensitive layer is reduced, thereby improving the heating effect of the container

[0074] In a possible design, the preset interval ranges from 1 mm to 20 mm.

[0075] In this design, the preset interval ranges from 1 mm to 20 mm. If the preset interval is too large, the area of the magnetic sensitive layer will be too small, which will affect the heating effect of the container. If the preset interval is too small, the magnetic sensitive layer will be damaged during the welding of the side wall and the non-metal substrate. Therefore, by setting the preset interval to range from 1 mm to 20 mm, the heating efficiency of the finished product can be ensured, and the influence of the magnetic sensitive layer on the welding of the side wall and the non-metal substrate is avoided.

[0076] According to a third aspect of the present application, a cooking appliance is provided, comprising the non-metal container and the electromagnetic heating device of the second aspect; the electromagnetic heating device is configured to generate a magnetic field to heat the magnetic sensitive layer in the non-metal container under the action of the magnetic field.

[0077] The electromagnetic heating device generates a magnetic field in the energized state, and the magnetic sensitive layer in the non-metal container is heated under the action of the magnetic field, thereby heating the material in the non-metal container.

[0078] In addition, the cooking appliance provided by the above technical solution of the present application can also have the following additional technical features:

[0079] In a possible design, the cooking appliance further comprises a base, a power supply device and a bearing part; the power supply device is arranged on the base and is configured to supply power to the electromagnetic heating device to generate a magnetic field in the energized state; the bearing part is arranged on the base, and the non-metal container is arranged on the bearing part.

[0080] In this design, the cooking appliance comprises a base, a power supply device, a bearing part and an electromagnetic heating device, and the non-metal container of any of the above embodiments. The non-metal substrate of the non-metal container is provided with a magnetic sensitive layer. The electromagnetic heating device is connected to the power supply device, and the power supply device supplies power to the electromagnetic heating device to generate an alternating magnetic field, and the magnetic sensitive layer can generate heat in the alternating magnetic field, thereby heating the material in the glass container.

[0081] Additional aspects and advantages of the present application will become apparent in the following description section, or will be understood by those skilled in the art through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0082] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0083] Figure 1 Fig. 1 shows a structural schematic diagram of a heating assembly in one embodiment of the present application;

[0084] Figure 2 Fig. 2 shows another structural schematic diagram of the heating assembly in one embodiment of the present application;

[0085] Figure 3 Fig. 3 shows a structural schematic diagram of a non-metallic container in another embodiment of the present application;

[0086] Figure 4 Fig. 4 shows a structural schematic diagram of a cooking appliance in still another embodiment of the present application;

[0087] Figure 5 Fig. 5 shows a structural schematic diagram of a method for manufacturing a non-metallic container in yet another embodiment of the present application.

[0088] Wherein, Figures 1 to 5 The correspondence between the reference signs and the component names is as follows:

[0089] 100 heating assembly, 120 non-metallic substrate, 140 magnetosensitive layer, 160 protective layer, 200 non-metallic container, 220 side wall, 300 cooking appliance, 320 base, 340 bearing portion, 360 electromagnetic heating device, 370 power supply device. DETAILED DESCRIPTION

[0090] In order to more clearly understand the above objectives, features and advantages of the present application, the present application will be further described below in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0091] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0092] Reference will now be made to the following description Figures 1 to 5 A heating assembly 100, a non-metallic container 200 and a cooking appliance 300 according to some embodiments of the present application are described below.

[0093] Embodiment one:

[0094] As Figure 1As shown, in one embodiment of the present application, a heating assembly 100 is provided, comprising: a non-metal substrate 120, a magnetosensitive layer 140, the magnetosensitive layer 140 is arranged on the non-metal substrate 120, and the sheet resistance of the magnetosensitive layer 140 is in the range of 0.1 mΩ to 7 mΩ.

[0095] The heating assembly 100 provided in the embodiment includes a non-metal substrate 120 and a magnetosensitive layer 140. The magnetosensitive layer 140 is arranged on the non-metal substrate 120, the magnetosensitive layer 140 includes a magnetosensitive metal material, the magnetosensitive layer 140 is a magnetic induction heating source, and the magnetosensitive layer 140 can generate heat under the action of a magnetic field. Compared with the heating mode in the prior art, in which the heating is performed on the electric heating plate arranged on the kettle body, in the technical solution, the magnetosensitive layer 140 serves as a heating source, the heating source can heat the material in the accommodation space, the heat exchange speed between the heating source and the material is improved, and thus the heating efficiency of the container is improved.

[0096] In the present application, the sheet resistance of the magnetosensitive layer 140 is in the range of 0.1 mΩ to 7 mΩ. Since the thermal conductivity of the non-metal container 200 is low, if the heat is too high, the heat is easy to accumulate on the non-metal substrate. Therefore, the sheet resistance of the magnetosensitive layer 140 is limited in the above range, on the one hand, the electrical conductivity of the magnetosensitive layer 140 is improved, and on the other hand, the thermal conductivity of the non-metal substrate 120 itself is taken into account, the problem of excessive heat generated by the magnetosensitive layer 140 due to too small sheet resistance, and the risk of rupture of the non-metal substrate 120 due to too high internal stress is avoided.

[0097] Further preferably, the sheet resistance of the magnetosensitive layer 140 is in the range of 0.1 mΩ to 3.5 mΩ.

[0098] By setting the sheet resistance of the magnetosensitive layer 140 in the above range, the electrical conductivity of the magnetosensitive layer 140 can be further improved, and thus the heating power of the heating assembly 100 is improved. Since the thermal resistance of the non-metal substrate 120 is high, the heat generated by the magnetosensitive layer 140 is difficult to uniformly transmit in the non-metal substrate 120, and hot spots are easy to form, thereby causing the rupture of the non-metal substrate 120. By limiting the sheet resistance of the magnetosensitive layer 140 in the above range, the heating power of the heating assembly 100 is high, thereby the heat flow in the non-metal substrate 120 can be improved, the difference in heat between each part is reduced, the formation of hot spots is reduced, and the heat resistance of the non-metal substrate 120 is improved.

[0099] In the above embodiment, the porosity of the magnetosensitive layer 140 is in the range of 1% to 20%, and / or the thickness of the magnetosensitive layer 140 is in the range of 10 um to 150 um.

[0100] In this embodiment, by adjusting the resistance value of the sheet resistance of the magnetic sensitive layer 140 within the above range, the maximum heating power of the container can be adjusted. Within the above range, the smaller the sheet resistance of the magnetic sensitive layer 140 is set, the greater the container power is.

[0101] By setting the porosity of the magnetic sensitive layer 140 to be within the range of 1% to 20%, on the one hand, the sheet resistance of the magnetic sensitive layer 140 can be reduced to improve the heating efficiency, and on the other hand, the increase in heating power caused by the reduction of the sheet resistance and the heat resistance of the non-metal substrate 120 can be taken into account. By setting the porosity of the magnetic sensitive layer 140 within the above range, the sheet resistance of the magnetic sensitive layer 140 can not be too small, and the possibility of the non-metal substrate 120 being broken due to excessive heating of the magnetic sensitive layer 140 can be reduced.

[0102] The porosity of the magnetic sensitive layer 140 is preferably within the range of 1-10%. By setting the porosity of the magnetic sensitive layer 140 to be within the range of 1% to 10%, the uniformity of the heating of the non-metal substrate 120 can also be improved, and the possibility of the non-metal substrate 120 being broken can also be reduced.

[0103] It is worth noting that the magnetic sensitive layer 140 is provided on the non-metal substrate 120 by spraying. Alternatively, a metal slurry is prepared and applied to the non-metal substrate 120.

[0104] Specifically, the spraying method is selected as an electric arc spraying method or a low-pressure cold spraying method to provide the magnetic sensitive layer 140 on the non-metal substrate 120. By the above method, the porosity of the magnetic sensitive layer 140 provided on the non-metal substrate 120 can be controlled within the above range, ensuring the heating efficiency of the heating assembly 100 while reducing the possibility of the non-metal substrate 120 being broken.

[0105] The thickness of the magnetic sensitive layer 140 is within the range of greater than or equal to 10 microns and less than or equal to 150 microns. Since the thickness of the magnetic sensitive layer 140 is related to the sheet resistance of the magnetic sensitive layer 140, by setting the thickness of the magnetic sensitive layer 140 within the above range, the sheet resistance of the magnetic sensitive layer 140 can be ensured to be within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the magnetic sensitive layer 140 is too large, the current will flow on the surface of the magnetic sensitive layer 140, causing the resistance of the magnetic sensitive layer 140 to increase, reducing the heating power, and also causing the porosity to be high, which will also reduce the heating power. By setting the thickness of the magnetic sensitive layer 140 within the range of 10 microns to 150 microns, the heating power of the heating assembly 100 can be greatly improved, and the possibility of the non-metal substrate 120 being broken due to excessive heating of the magnetic sensitive layer 140 can also be avoided.

[0106] In the case that the thickness of the magnetosensitive layer 140 is ensured to be within the above range, the porosity of the magnetosensitive layer 140 is set, so that the square resistance is not too small, and the possibility of the non-metal substrate 120 being broken is reduced; further, the uniformity of the non-metal substrate 120 being heated is improved, and the possibility of the non-metal substrate 120 being broken is also reduced.

[0107] The thickness of the magnetosensitive layer 140 is preferably in the range of 60 microns to 80 microns. By setting the thickness of the magnetosensitive layer 140 to be between 60 microns and 80 microns, not only the square resistance of the magnetosensitive layer 140 is reduced, but also the possibility of the non-metal substrate 120 being broken is reduced, and the non-metal substrate 120 is heated more uniformly.

[0108] It is worth noting that not only the porosity of the magnetosensitive layer 140 affects the square resistance of the magnetosensitive layer 140, but also the thickness and purity of the magnetosensitive layer 140 affect the square resistance. After the set square resistance of the magnetosensitive layer 140 is determined, the higher the purity and the lower the porosity of the magnetosensitive layer 140, the thinner the magnetosensitive layer 140 can be set. The lower the purity and the higher the porosity of the magnetosensitive layer 140, the thicker the magnetosensitive layer 140 can be set. On this basis, the thickness, porosity and purity of the magnetosensitive layer 140 can be reasonably set, so that the porosity and purity of the magnetosensitive layer 140 can be reasonably set under the premise of ensuring the square resistance of the magnetosensitive layer 140, and the processing difficulty and cost of the container are reduced.

[0109] In any of the above embodiments, the magnetic field induction resistance of the magnetosensitive layer 140 is in the range of 2Ω to 5Ω; and / or the inductance of the magnetosensitive layer 140 is in the range of 70uH to 80uH.

[0110] In this embodiment, the range of the magnetic field induction resistance of the magnetosensitive layer 140 is limited, which can ensure the heating efficiency of the magnetosensitive layer 140 in the magnetic field. The induction resistance of the magnetosensitive layer 140 increases with the increase of the thickness of the magnetosensitive layer 140, and when the thickness of the magnetosensitive layer 140 is greater than the first preset thickness, the induction resistance of the magnetosensitive layer 140 decreases with the increase of the thickness of the magnetosensitive layer 140. By limiting the magnetic induction resistance of the magnetosensitive layer 140, the induction magnetic field capacity of the magnetosensitive layer 140 is improved, and the square resistance of the magnetosensitive layer 140 is limited, which improves the electrical conductivity of the magnetosensitive layer 140. By limiting the magnetic induction resistance of the magnetosensitive layer 140 and the square resistance of the magnetosensitive layer 140, the electrical conductivity and magnetic induction capacity of the magnetosensitive layer 140 are improved, so that the heating efficiency of the heating assembly 100 is further improved.

[0111] The inductance range of the magnetic induction layer 140 is set to 70uH-80uH, which further improves the inductive capacity of the magnetic induction layer 140 to the magnetic field, and through the limitation of the inductance of the magnetic induction layer 140 and the limitation of the square resistance of the magnetic induction layer 140, the heating efficiency of the heating assembly 100 can be improved.

[0112] In any of the above embodiments, the magnetic induction layer 140 comprises a weak magnetic metal material; wherein the relative magnetic permeability of the weak magnetic metal material is less than 1.

[0113] In this embodiment, the material of the magnetic induction layer 140 includes a weak magnetic metal material, and the relative magnetic permeability of the weak magnetic metal material is less than 1. The metal magnetic induction layer 140 can quickly heat under the action of the magnetic field, which has the advantage of fast heating speed compared with the existing technology of conducting heat through the container.

[0114] In any of the above embodiments, the weak magnetic metal material is aluminum, and the magnetic induction layer 140 is an aluminum magnetic induction layer 140; wherein the porosity of the aluminum magnetic induction layer 140 is 1%-20%, and / or the thickness of the aluminum magnetic induction layer 140 is 40um-150um.

[0115] In this embodiment, when the weak magnetic metal material in the magnetic induction layer 140 is selected as aluminum, i.e., the magnetic induction layer 140 is selected as an aluminum magnetic induction layer 140. The porosity of the aluminum magnetic induction layer 140 is set to 1%-20%, and / or the thickness of the aluminum magnetic induction layer 140 is set to 40um-150um.

[0116] By setting the porosity of the aluminum magnetic induction layer to 1%-20%, on the one hand, the square resistance of the aluminum magnetic induction layer can be reduced, and the heating efficiency can be improved, on the other hand, the heating power brought by the reduction of the square resistance and the heat resistance of the non-metal substrate 120 can be considered. By setting the porosity of the aluminum magnetic induction layer within the above range, the square resistance of the aluminum magnetic induction layer can not be too small, which reduces the possibility of the non-metal substrate 120 being broken due to the excessive heating of the aluminum magnetic induction layer.

[0117] The preferred range of the porosity of the aluminum magnetic induction layer is 1%-10%. By setting the porosity of the aluminum magnetic induction layer to 1%-10%, the uniformity of the heating of the non-metal substrate 120 can also be improved, which also reduces the possibility of the non-metal substrate 120 being broken.

[0118] The thickness of the aluminum magnetic layer is set to be greater than or equal to 40 microns and less than or equal to 150 microns. Since the thickness of the aluminum magnetic layer is related to the sheet resistance of the aluminum magnetic layer, setting the thickness of the aluminum magnetic layer in the above range can ensure that the sheet resistance of the aluminum magnetic layer is within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the aluminum magnetic layer is too large, it will cause the current to flow on the surface of the aluminum magnetic layer, increase the resistance of the magnetic layer 140, reduce the heating power, and also cause the porosity to be high. The high porosity will also reduce the heating power. The present application sets the thickness of the aluminum magnetic layer to be between 40 microns and 150 microns, which can greatly improve the heating power of the heating assembly 100. In addition, due to the increase in heating power caused by the reduction in thickness, the possibility of rupture of the non-metallic substrate 120 caused by excessive heat generated by the aluminum magnetic layer is also avoided.

[0119] While ensuring that the thickness of the aluminum magnetic layer is within the above range, a certain porosity is set for the aluminum magnetic layer, which can prevent the sheet resistance from being too small and reduce the possibility of rupture of the non-metallic substrate 120. Furthermore, it can also improve the uniformity of the heating of the non-metallic substrate 120, which also reduces the possibility of rupture of the non-metallic substrate 120.

[0120] The thickness of the aluminum magnetic layer is preferably set to be between 60 microns and 80 microns. By setting the thickness of the aluminum magnetic layer to be between 60 microns and 80 microns, not only can the sheet resistance of the magnetic layer 140 be reduced, but also the possibility of rupture of the non-metallic substrate 120 can be reduced, and the non-metallic substrate 120 can be heated more uniformly.

[0121] It is worth noting that during the preparation of the aluminum magnetic layer, a slurry containing metallic aluminum can be selected first, and the slurry containing metallic aluminum is coated on the non-metallic substrate 120 to complete the preparation of the aluminum magnetic layer.

[0122] Alternatively, pure metallic aluminum can be directly applied to the non-metallic substrate 120 by spraying to complete the preparation of the aluminum magnetic layer.

[0123] In any of the above embodiments, the weak magnetic metal material is copper, and the magnetic layer 140 is a copper magnetic layer 140. The porosity of the copper magnetic layer 140 is set to be between 1% and 20%, and / or the thickness of the copper magnetic layer 140 is set to be between 10 microns and 80 microns.

[0124] In this embodiment, when the weak magnetic metal material in the magnetic layer 140 is selected as copper, i.e. the magnetic layer 140 is selected as a copper magnetic layer 140. The porosity of the copper magnetic layer 140 is set to be between 1% and 20%, and / or the thickness of the copper magnetic layer 140 is set to be between 10 microns and 80 microns.

[0125] By setting the porosity of the copper magnetic layer to be 1% to 20%, on the one hand, the copper magnetic layer can reduce the square resistance and improve the heating efficiency, and on the other hand, the heating power brought by the reduction of the square resistance and the heat resistance of the non-metal substrate 120 can be considered. By setting the porosity of the copper magnetic layer to be in the above range, the square resistance of the copper magnetic layer can not be too small, and the possibility of the non-metal substrate 120 being broken due to excessive heating of the copper magnetic layer can be reduced.

[0126] The porosity of the copper magnetic layer is preferably 1% to 10%. By setting the porosity of the copper magnetic layer to be 1% to 10%, the uniformity of the heating of the non-metal substrate 120 can be improved, and the possibility of the non-metal substrate 120 being broken can also be reduced.

[0127] The thickness of the copper magnetic layer is set to be greater than or equal to 10 microns and less than or equal to 80 microns. Since the thickness of the copper magnetic layer is related to the square resistance of the copper magnetic layer, by setting the thickness of the copper magnetic layer to be in the above range, the square resistance of the copper magnetic layer can be ensured to be within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the copper magnetic layer is too large, the current will flow on the surface of the copper magnetic layer, which will increase the resistance of the magnetic layer 140, reduce the heating power, and also cause the porosity to be high. Higher porosity will also reduce the heating power. The thickness of the copper magnetic layer is set to be between 10 microns and 80 microns, which can greatly improve the heating power of the heating assembly 100, and due to the increase in heating power caused by the reduction in thickness, the possibility of the non-metal substrate 120 being broken due to excessive heating of the copper magnetic layer can be avoided.

[0128] By setting the porosity of the copper magnetic layer to be in the above range, the square resistance of the copper magnetic layer can not be too small, and the possibility of the non-metal substrate 120 being broken can be reduced; further, the uniformity of the heating of the non-metal substrate 120 can be improved, and the possibility of the non-metal substrate 120 being broken can also be reduced.

[0129] The thickness of the copper magnetic layer is set to be greater than or equal to 10 microns and less than or equal to 80 microns. Since the thickness of the copper magnetic layer is related to the square resistance of the copper magnetic layer, by setting the thickness of the copper magnetic layer to be in the above range, the square resistance of the copper magnetic layer can be ensured to be within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the copper magnetic layer is too large, the current will flow on the surface of the copper magnetic layer, which will increase the resistance of the magnetic layer 140, reduce the heating power, and also cause the porosity to be high. Higher porosity will also reduce the heating power. The thickness of the copper magnetic layer is set to be between 10 microns and 80 microns, which can greatly improve the heating power of the heating assembly 100, and due to the increase in heating power caused by the reduction in thickness, the possibility of the non-metal substrate 120 being broken due to excessive heating of the copper magnetic layer can be avoided.

[0130] In any of the above embodiments, the weak magnetic metal material is silver, and the magnetic layer 140 is a silver magnetic layer 140; wherein the porosity of the silver magnetic layer 140 is 1% to 10%, and / or the thickness of the silver magnetic layer 140 is 5um to 35um.

[0131] In this embodiment, the weak magnetic metal material in the magnetic sensitive layer 140 is selected as silver, i.e., the magnetic sensitive layer 140 is selected as a silver magnetic sensitive layer 140. The porosity of the silver magnetic sensitive layer 140 is set to 1% to 10%, and / or the thickness of the silver magnetic sensitive layer 140 is set to a range of 5um to 35um.

[0132] By setting the porosity of the silver magnetic sensitive layer to 1% to 10%, on the one hand, the sheet resistance of the silver magnetic sensitive layer can be reduced to improve the heating efficiency, and on the other hand, the heating power brought by the reduction of the sheet resistance and the heat resistance of the non-metal substrate 120 can be considered. By setting the porosity of the copper magnetic sensitive layer to the above range, the sheet resistance of the copper magnetic sensitive layer cannot be too small, and the possibility of the non-metal substrate 120 being broken due to the excessive heating of the copper magnetic sensitive layer is reduced.

[0133] The preferred range of the porosity of the silver magnetic sensitive layer is 1% to 5%. By setting the porosity of the silver magnetic sensitive layer to 1% to 5%, the uniformity of the heating of the non-metal substrate 120 can be improved, and the possibility of the non-metal substrate 120 being broken is also reduced.

[0134] The thickness of the silver magnetic sensitive layer is set to a range of greater than or equal to 5 microns and less than or equal to 35 microns. Since the thickness of the silver magnetic sensitive layer is related to the sheet resistance of the silver magnetic sensitive layer, by setting the thickness of the silver magnetic sensitive layer to the above range, the sheet resistance of the silver magnetic sensitive layer can be ensured to be within the set range, thereby ensuring the heating efficiency of the container. If the thickness of the silver magnetic sensitive layer is too large, the current will flow on the surface of the silver magnetic sensitive layer, the resistance of the magnetic sensitive layer 140 will increase, the heating power will be reduced, and a higher porosity will also be caused. A higher porosity will also reduce the heating power. The present application sets the thickness of the silver magnetic sensitive layer to a range of 5 microns to 35 microns, which can greatly improve the heating power of the heating assembly 100, and due to the improvement of the heating power caused by the reduction of the thickness, the possibility of the non-metal substrate 120 being broken due to the excessive heating of the silver magnetic sensitive layer is also avoided.

[0135] By setting the porosity of the silver magnetic sensitive layer to a certain value while ensuring that the thickness of the silver magnetic sensitive layer is within the above range, the sheet resistance cannot be too small, and the possibility of the non-metal substrate 120 being broken is reduced. Furthermore, the uniformity of the heating of the non-metal substrate 120 can be improved, and the possibility of the non-metal substrate 120 being broken is also reduced.

[0136] The preferred range of the thickness of the silver magnetic sensitive layer is 10 microns to 20 microns. By setting the thickness of the silver magnetic sensitive layer to 10 microns to 20 microns, the sheet resistance of the magnetic sensitive layer 140 can be reduced, the possibility of the non-metal substrate 120 being broken can be reduced, and the non-metal substrate 120 can be heated more uniformly.

[0137] It is worth mentioning that in the process of preparing the silver magnetic sensitive layer, a slurry containing metallic silver can be prepared first, and then the silver magnetic sensitive layer is prepared by coating the slurry containing metallic silver on the non-metallic substrate.

[0138] Alternatively, pure metallic silver can be directly deposited on the non-metallic substrate by spraying to prepare the silver magnetic sensitive layer.

[0139] In any of the above embodiments, the sheet resistance of the magnetic sensitive layer 140 is in the range of 0.1 mΩ to 3.5 mΩ.

[0140] In this embodiment, by limiting the sheet resistance of the magnetic sensitive layer 140, the magnetic sensitive layer 140 can generate heat through the resistance under the action of the alternating magnetic field, thereby improving the heating effect of the glass container.

[0141] By setting the sheet resistance of the magnetic sensitive layer 140 in the above range, the electrical conductivity of the magnetic sensitive layer 140 can be further improved, thereby improving the heating power of the heating assembly 100. Since the non-metallic substrate 120 has high thermal resistance, the heat generated by the magnetic sensitive layer 140 is difficult to uniformly transmit in the non-metallic substrate 120, which is easy to form hot spots, thereby causing the rupture of the non-metallic substrate 120. By limiting the sheet resistance of the magnetic sensitive layer 140 in the above range, the heating power of the heating assembly 100 is high, thereby improving the flow of heat in the non-metallic substrate 120, reducing the difference in heat between each part, reducing the formation of hot spots, and improving the heat resistance of the non-metallic substrate 120.

[0142] In any of the above embodiments, the content of the weak magnetic metal material in the magnetic sensitive layer 140 is in the range of 60% to 90%.

[0143] In this embodiment, the magnetic sensitive layer 140 can be formed by mixing a weak magnetic metal material and other materials, wherein the weak magnetic metal material can be metallic silver, copper, aluminum, etc. The content of the weak magnetic metal material is limited.

[0144] It can be understood that the heating power of the magnetic sensitive layer 140 is not only related to the type of material, the thickness and porosity of the magnetic sensitive layer 140, but also related to the content of the weak magnetic metal material. In order to meet the actual needs, for example, in the design of the container, the material, thickness and porosity of the magnetic sensitive layer 140 have been designed accordingly. In order to meet the design requirements, the content of the weak magnetic metal material in the magnetic sensitive layer 140 can be adjusted, thereby ensuring that the heating efficiency of the magnetic sensitive layer 140 in the magnetic field meets the requirements under the premise of meeting the design requirements.

[0145] In any of the above embodiments, the magnetic sensitive layer 140 further comprises an inorganic substance; the inorganic substance comprises one or more of aluminum oxide, silicon oxide, boron oxide, bismuth oxide and calcium oxide.

[0146] In this embodiment, the magnetosensitive layer 140 not only includes the aforementioned weak-magnetic metal material, but also includes inorganic substances. The inorganic substances can be one or more of aluminum oxide, silicon oxide, boron oxide, potassium oxide, bismuth oxide, and calcium oxide.

[0147] In one embodiment, the weak-magnetic metal content is 60% to 90%, and the inorganic substance content is 10% to 40%.

[0148] In some embodiments, the weak-magnetic metal material and the inorganic substance can be mixed into a coating, and the mixed coating can be disposed on the non-metal substrate 120 by thermal spraying.

[0149] As shown in any of the above embodiments, the heating assembly 100 further includes a protective layer 160 disposed on the outer surface of the magnetosensitive layer 140 to seal the magnetosensitive layer 140, wherein the sintering temperature of the protective layer 160 is less than 600°C. Figure 2

[0150] In this embodiment, the heating assembly 100 further includes a protective layer 160 covering the magnetosensitive layer 140 for sealing and protecting the protective layer 160.

[0151] Since the magnetosensitive layer 140 is disposed in the holding cavity of the container, the structure of the protective layer 160 can avoid direct contact between the material in the holding cavity and the magnetosensitive layer 140, thereby slowing down the oxidation rate of the magnetosensitive layer 140 and improving the durability of the magnetosensitive layer 140. The area of the magnetosensitive layer 140 is smaller than the area of the non-metal substrate 120, and the magnetosensitive layer 140 is located in the middle of the non-metal substrate 120, and a gap is provided between the edge side walls 220 of the magnetosensitive layer 140. By disposing the magnetosensitive layer 140 at the middle position of the non-metal substrate 120, and the magnetosensitive layer 140 has a certain distance from the edge of the non-metal substrate 120, the protective layer 160 can fully cover the outer surface of the magnetosensitive layer 140. The upper surface and the side surface of the magnetosensitive layer 140 are covered by the protective layer 160, and the bottom surface of the magnetosensitive layer 140 is connected to the non-metal substrate 120, so that each part of the magnetosensitive layer 140 is not directly exposed to the holding cavity, and the oxidation of the magnetosensitive layer 140 does not affect the material in the holding cavity.

[0152] When the protective layer 160 is provided on the magnetosensitive layer 140, the protective layer 160 is disposed on the magnetosensitive layer 140 by sintering. By limiting the sintering temperature of the protective layer 160 to be less than or equal to 600°C, the influence of sintering on the magnetosensitive layer 140 is reduced, avoiding damage to the magnetosensitive layer 140, and also reducing the influence of sintering of the protective layer 160 on the bonding strength between the non-metal substrate 120 and the magnetosensitive layer 140, thereby improving the heating effect of the container on the material.

[0153] ​In any of the above embodiments, the protective layer 160 comprises a polytetrafluoroethylene coating, a ceramic coating, or a silicone coating or a glass enamel layer.

[0154] In this embodiment, the polytetrafluoroethylene, ceramic and silicone are all high-stability food-grade coatings, i.e., the polytetrafluoroethylene coating, ceramic coating and silicone coating have strong stability in a high-temperature environment and will not disperse into the material to be heated in the container, avoiding contamination of the material to be heated during the heating and cooking process in the accommodation space, thereby improving the stability of the container. By setting the polytetrafluoroethylene coating, ceramic coating or silicone coating as the protective coating, not only can the magnetic sensitive layer 140 be prevented from contacting the material in the accommodation space, but also the protective layer 160 itself can be prevented from reacting after contacting the material, thereby improving the user experience.

[0155] In some embodiments, the protective layer 160 has a thickness greater than or equal to 15 microns and less than or equal to 40 microns.

[0156] In these embodiments, the thickness of the protective layer 160 is set to be between 40 microns and 80 microns, so that the thickness of the protective layer 160 is within an appropriate range, avoiding the increase in processing difficulty and the easy breakage of the protective layer 160 due to the too small thickness of the protective layer 160. It also avoids the problems of affecting the heating efficiency and wasting resources due to the too large thickness of the protective layer 160.

[0157] Embodiment two:

[0158] As shown in Figure 1 , Figure 2 and Figure 3 , another embodiment of the present application provides a non-metallic container 200, comprising the heating assembly 100 in the above embodiment one and a side wall 220. The side wall 220 is connected to the non-metallic substrate 120 by welding or bonding, and the non-metallic substrate 120 and the side wall 220 enclose a containing cavity, and the magnetic sensitive layer 140 is located inside the containing cavity.

[0159] The non-metallic container 200 provided in this embodiment is provided with the side wall 220 and the heating assembly 100, and the non-metallic substrate 120 in the heating assembly 100 serves as the bottom plate of the non-metallic container 200. The side wall 220 encloses a containing cavity, and the containing cavity obtained by the side wall 220 encloses two open ends. The non-metallic substrate 120 and the side wall 220 are connected by welding or bonding, so that one of the two open ends can be plugged, thereby forming a containing cavity that can store the material to be heated. The non-metallic substrate 120 and the side wall 220 are connected by welding or bonding, so that the magnetic sensitive layer 140 can be first arranged on the non-metallic substrate 120, and then the non-metallic substrate 120 and the side wall 220 are assembled together by welding or bonding, thereby simplifying the container preparation process.

[0160] The magnetic sensitive layer 140 is arranged inside the accommodating cavity, and the magnetic sensitive layer 140 can directly contact the material in the accommodating cavity. The magnetic sensitive layer 140 generates heat under the action of the magnetic field. Since the magnetic sensitive layer 140 directly contacts the material, heat transfer through the non-metal substrate 120 is not required, thereby improving the heating efficiency of the non-metal container 200 on the material.

[0161] The lower surface of the non-metal substrate 120 is a flat surface, and the non-metal container 200 can be placed on the base through the non-metal substrate 120. The base is provided with an electromagnetic heating device 360 capable of generating a magnetic field. The electromagnetic heating device 360 can generate a magnetic field in an energized state. The magnetic sensitive layer 140 is arranged on the non-metal substrate 120 of the non-metal container 200, and the magnetic sensitive layer 140 can generate heat under the action of the magnetic field to heat the material stored in the accommodating cavity.

[0162] In any of the above embodiments, the edge of the magnetic sensitive layer 140 and the edge of the non-metal substrate 120 have a predetermined spacing.

[0163] In this embodiment, a predetermined spacing is provided between the magnetic sensitive layer 140 and the side wall 220, so that the magnetic sensitive layer 140 and the side wall 220 have a certain distance, which can avoid the problem of cracking of the magnetic sensitive layer 140 caused by the contact arrangement of the magnetic sensitive layer 140 and the side wall 220.

[0164] The edge of the magnetic sensitive layer 140 and the edge of the non-metal substrate 120 are limited to have a predetermined spacing. By limiting the predetermined spacing, when the non-metal substrate 120 and the side wall 220 are welded, the influence of the welding operation on the magnetic sensitive layer 140 is reduced, which avoids the occurrence of damage to the magnetic sensitive layer 140, and also reduces the influence of the welding operation on the bonding strength between the substrate and the magnetic sensitive layer 140, thereby improving the heating effect of the non-metal container 200.

[0165] In any of the above embodiments, the predetermined spacing is in the range of 1 mm to 20 mm.

[0166] In this embodiment, the value range of the predetermined spacing is set to 1 mm to 20 mm. If the predetermined spacing is too large, it will affect the area of the magnetic sensitive layer 140, making the area too small and affecting the heating effect of the non-metal container 200. If the predetermined spacing is too small, the magnetic sensitive layer 140 cannot be damaged during the welding process of the side wall 220 and the non-metal substrate 120. Therefore, by setting the value range of the predetermined spacing to 1 mm to 20 mm, the heating efficiency of the finished product can be ensured while avoiding the influence of the magnetic sensitive layer 140 on the welding process of the side wall 220 and the non-metal substrate 120.

[0167] Embodiment three:

[0168] Table 1 shows a table of experimental data of the sheet resistance, thickness, porosity, metal element content and heating power of the magnetosensitive layer in the embodiment of the present application.

[0169] Specifically, the magnetosensitive layer 140 containing the weak magnetic metal material and the inorganic substance is arranged on the nonmetal substrate 120.

[0170] The content of the weak magnetic metal material, the porosity of the magnetosensitive layer 140, the influence of the thickness of the magnetosensitive layer 140 on the sheet resistance of the magnetosensitive layer 140, and the influence of the sheet resistance of the magnetosensitive layer 140 on the heating power of the nonmetal container 200 are shown in Table 1.

[0171] The sheet resistance of the magnetosensitive layer 140 is set in the range of 0.1 mΩ to 3.5 mΩ, which can improve the conductivity of the magnetosensitive layer 140, improve the heating efficiency of the magnetosensitive layer 140, and also reduce the possibility of rupture of the nonmetal substrate 120 caused by the heating concentration of the magnetosensitive layer 140.

[0172] In Table 1, the magnetosensitive layer 140 can be selected as a silver paste layer or an aluminum layer (hereinafter referred to as a silver paste layer and an aluminum layer according to the different types of metals).

[0173] Table 1

[0174]

[0175] As can be seen from the content of Table 1, the porosity and thickness of the silver paste layer 2, the silver paste layer 3 and the silver paste layer 4 are all different, but the sheet resistance among the three is the same, that is, the sheet resistance of the magnetosensitive layer 140 can be adjusted by adjusting the thickness and porosity of the magnetosensitive layer 140.

[0176] As can be seen from the content of Table 1, the metal content in the silver paste layer 10 is only 50%, and the sheet resistance of the magnetosensitive layer 140 cannot meet the requirement of 0.1 mΩ to 3.5 mΩ. That is, in order to ensure that the sheet resistance of the magnetosensitive layer 140 meets the requirement, the metal content in the magnetosensitive layer 140 needs to be controlled to be 70% or more.

[0177] As can be seen from the content of Table 1, the sheet resistance of the silver paste layer 11 is 30 mΩ, and the heating power of the magnetosensitive layer 140 is only 365 W. It can be seen that if the sheet resistance of the magnetosensitive layer 140 is high, the heating power will be low. The sheet resistance of the silver paste layer 12 is 105 mΩ, and the magnetosensitive layer 140 cannot be heated. It can be seen that if the sheet resistance of the magnetosensitive layer 140 is too high, the magnetosensitive layer 140 cannot be heated in the magnetic field. The sheet resistance of the silver paste layer 13 is 0.01 mΩ, and the magnetosensitive layer 140 cannot be heated. It can be seen that if the sheet resistance of the magnetosensitive layer 140 is too low, the magnetosensitive layer 140 cannot be heated in the magnetic field.

[0178] In the above embodiment, when the weak magnetic metal material in the magnetic sensitive layer 140 is a silver paste layer, and the content of metallic silver is 70%, the magnetic sensitive layer 140 can be 0.2 mΩ by adjusting the thickness and porosity.

[0179] In the above embodiment, when the weak magnetic metal material in the magnetic sensitive layer 140 is a silver paste layer, and the porosity is 20% and the content of metallic element is 50%, the square resistance is too large to meet the requirement of 0.1 mΩ to 3.5 mΩ, that is, the content of metallic element can directly affect the square resistance of the magnetic sensitive layer 140 and the heating power of the magnetic sensitive layer 140 in the magnetic field.

[0180] It can be understood that not only the porosity of the magnetic sensitive layer 140 affects the square resistance of the magnetic sensitive layer 140, but also the thickness and purity of the magnetic sensitive layer 140 affect the square resistance. After the set square resistance of the magnetic sensitive layer 140 is determined, the higher the purity and the lower the porosity of the magnetic sensitive layer 140 are, the thinner the magnetic sensitive layer 140 can be set. The lower the purity and the higher the porosity of the magnetic sensitive layer 140 are, the thicker the magnetic sensitive layer 140 can be set. On this basis, the thickness, porosity and purity of the magnetic sensitive layer 140 can be reasonably set, so that the porosity and purity of the magnetic sensitive layer 140 can be reasonably set under the premise of ensuring the square resistance of the magnetic sensitive layer 140, and the processing difficulty and cost of the non-metallic container 200 are reduced.

[0181] Embodiment Four:

[0182] As shown in FIGS. 1 to 3, the non-metallic container 200 according to the present application comprises a container body 210 and a magnetic sensitive layer 140. The container body 210 is made of a non-metallic material. The magnetic sensitive layer 140 is arranged on the inner wall of the container body 210. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in FIGS. 1 to 3, the non-metallic container 200 according to the present application comprises a container body 210 and a magnetic sensitive layer 140. The container body 210 is made of a non-metallic material. The magnetic sensitive layer 140 is arranged on the inner wall of the container body 210.

[0183] The electromagnetic heating device 360 generates a magnetic field in the energized state, and the magnetic sensitive layer 140 in the non-metallic container 200 generates heat under the action of the magnetic field, thereby heating the material in the non-metallic container 200.

[0184] Since the non-metallic container 200 is the non-metallic container 200 in the above embodiment two, it has all the beneficial technical effects of the non-metallic container 200 in the above embodiment one, which will not be repeated here.

[0185] In the above embodiment, the cooking appliance 300 further includes a base 320, a power supply device 370, and a support part 340; the power supply device 370 is disposed on the base 320 and is used to supply power to the electromagnetic heating device 360 ​​so that the electromagnetic heating device 360 ​​generates a magnetic field when energized; the support part 340 is disposed on the base 320, and the non-metallic container 200 is disposed on the support part 340.

[0186] In this embodiment, the cooking appliance 300 includes a base 320, a power supply device 370, a support portion 340, and an electromagnetic heating device 360, as well as a non-metallic container 200 as described in any of the above embodiments. A magnetically sensitive layer 140 is disposed on the non-metallic substrate 120 of the non-metallic container 200. The magnetically sensitive layer 140 is connected to the power supply device 370, which supplies power to the electromagnetic heating device 360. The electromagnetic heating device 360 ​​generates an alternating magnetic field, and the magnetically sensitive layer 140 can generate heat in the alternating magnetic field, thereby heating the material in the non-metallic container 200.

[0187] Example 5:

[0188] like Figure 5 As shown, another embodiment of the present invention provides a method for preparing a non-metallic container, specifically including:

[0189] Step 402: The sidewalls of the non-metallic container are prepared by blow molding and tube drawing.

[0190] Step 404: Use float glass or other processes to produce a non-metallic substrate for the non-metallic container, the size of which matches the body of the pot;

[0191] Step 406: Etching or sandblasting is used on the upper surface of the non-metallic substrate to form a roughened surface;

[0192] Step 408: Prepare a metallic aluminum layer on the surface of the roughened layer by means of arc spraying or low-pressure cold spraying;

[0193] Step 410: Connect the glass non-metallic substrate to the sidewall using fusion welding or inorganic glass slurry, organic adhesive, or other methods.

[0194] Step 412: A protective layer is prepared by spraying compressed air onto the surface of the magnetically sensitive layer.

[0195] In this embodiment, the side wall of the non-metal container and the non-metal substrate are prepared respectively, and both are made of high borosilicate glass. A roughened surface is provided on the prepared non-metal substrate, and the roughness of the roughened surface is between 3 microns and 10 microns. Then a magnetosensitive layer is prepared on the roughened surface of the non-metal substrate, and the magnetosensitive layer is specifically a metal aluminum layer. The purity of the metal aluminum in the metal aluminum layer is 80% to 90%, the porosity of the metal aluminum layer is 1% to 10%, and the thickness of the metal aluminum layer is 40 microns to 80 microns, so that the sheet resistance of the metal aluminum layer is 0.1 microsiemens to 5 microsiemens. The non-metal substrate provided with the magnetosensitive layer is connected with the side wall by fusion welding or inorganic glass paste, organic adhesive and the like, so as to obtain an overall non-metal container. A protective layer is provided on the surface of the magnetosensitive layer by compressed air spraying, and the surface of the magnetosensitive layer is completely covered by the protective layer, so as to avoid direct contact of the magnetosensitive layer with the material in the accommodation space. The protective layer includes a polytetrafluoroethylene coating, a ceramic coating or a silicone resin coating. The thickness of the protective coating is 15 microns to 45 microns.

[0196] It should be noted that, in order to improve the convenience of preparing the magnetosensitive layer, step 512 can be performed after step 508, and then step 510 is performed. After the magnetosensitive layer is prepared on the non-metal substrate, a protective layer is prepared on the magnetosensitive layer, and finally the non-metal substrate provided with the magnetosensitive layer and the protective layer is arranged together with the side wall to form a non-metal container, so as to avoid the step of arranging the protective layer on the magnetosensitive layer in the operation inside the non-metal container.

[0197] It can be understood that the magnetically conductive coating can generate a large amount of heat under the action of commercial power 220V, and the power can reach 1000 watts to 1800 watts.

[0198] It should be noted that in the claims, specification and drawings of the present application, the term "a plurality of" refers to two or more, unless otherwise specifically limited, and the terms "upper", "lower", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to more conveniently describe the present application and make the description process more simple, and therefore these descriptions cannot be understood as limiting the present application; the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection between objects, or a detachable connection between objects, or an integral connection; it can be a direct connection between objects, or an indirect connection between objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0199] In the claims, specification, and drawings of the present disclosure, terms have their plain, ordinary meaning unless otherwise indicated by the context of their use. The terms "comprise", "comprising", "include", "including", "have" and "having" are used interchangeably and mean "including but not limited to". It is further noted that the claims can be drafted to exclude any elements or steps from the disclosure, or to "not include" any elements or steps, or to "not have" any elements or steps. As such these terms are intended to operate as "open" and "inclusive" rather than "closed" or "exclusive".

[0200] The preferred embodiments of the present application are described herein above with the understanding that the present application can be practiced otherwise than as specifically described.

Claims

1. A non-metallic container characterized in that, The non-metal container comprises: a heating assembly comprising: a non-metal substrate, a magnetic sensitive layer arranged on the non-metal substrate, the magnetic sensitive layer having a sheet resistance ranging from 0.1 mΩ to 3.5 mΩ; a porosity of the magnetic sensitive layer ranging from 1% to 20%; a content of weak magnetic metal material in the magnetic sensitive layer ranging from 60% to 90%; a protective layer arranged on an outer surface of the magnetic sensitive layer to seal the magnetic sensitive layer; the non-metal container further comprises: a side wall, the non-metal substrate and the side wall enclosing a containing cavity, the magnetic sensitive layer being located inside the containing cavity, and the protective layer being used to prevent the material in the containing cavity from directly contacting the magnetic sensitive layer.

2. The non-metal container according to claim 1, wherein: a thickness of the magnetic sensitive layer ranges from 10 um to 150 um.

3. The non-metal container according to claim 2, wherein: a magnetic field induced resistance of the magnetic sensitive layer ranges from 2 Ω to 5 Ω; and / or an inductance of the magnetic sensitive layer ranges from 70 uH to 80 uH.

4. The non-metal container according to any one of claims 1 to 3, wherein: a relative magnetic permeability of the weak magnetic metal material is less than 1.

5. The non-metal container according to claim 4, wherein: the weak magnetic metal material is aluminum, and the magnetic sensitive layer is an aluminum magnetic sensitive layer; wherein a porosity of the aluminum magnetic sensitive layer ranges from 1% to 20%, and / or a thickness of the aluminum magnetic sensitive layer ranges from 40 um to 150 um.

6. The non-metal container according to claim 4, wherein: the weak magnetic metal material is copper, and the magnetic sensitive layer is a copper magnetic sensitive layer; wherein a porosity of the copper magnetic sensitive layer ranges from 1% to 20%, and / or a thickness of the copper magnetic sensitive layer ranges from 10 um to 80 um.

7. The non-metal container according to claim 4, wherein: the weak magnetic metal material is silver, and the magnetic sensitive layer is a silver magnetic sensitive layer; wherein a porosity of the silver magnetic sensitive layer ranges from 1% to 10%, and / or a thickness of the silver magnetic sensitive layer ranges from 5 um to 35 um.

8. The non-metal container according to claim 4, wherein: the magnetic sensitive layer further comprises an inorganic substance; the inorganic substance comprises one or more of aluminum oxide, silicon oxide, boron oxide, bismuth oxide, and calcium oxide.

9. The non-metal container according to any one of claims 1 to 3, wherein: a sintering temperature of the protective layer is less than 600 °C.

10. The non-metallic container of claim 9, wherein, the protective layer comprises: a polytetrafluoroethylene coating, a ceramic coating, or a silicone resin coating, or a glass glaze layer.

11. The non-metal container according to claim 1, wherein: the side wall and the non-metal substrate are connected by welding or bonding.

12. The non-metal container according to claim 1, wherein: an edge of the magnetic sensitive layer has a preset spacing from an edge of the non-metal substrate.

13. The non-metal container according to claim 12, wherein: the preset spacing ranges from 1 mm to 20 mm.

14. A cooking appliance characterized by, ​ The non-metallic container according to any one of claims 1 to 13; An electromagnetic heating device for generating a magnetic field to heat the magnetosensitive layer in the non-metallic container under the action of the magnetic field.

15. The cooking appliance of claim 14, wherein, Further comprising: A base; A power supply device arranged on the base for supplying power to the electromagnetic heating device to make the electromagnetic heating device generate the magnetic field in a powered state; A bearing portion arranged on the base, and the non-metallic container is arranged on the bearing portion.

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