Heating component and manufacturing method thereof, cooking utensil and cooking equipment

Abstract

The present invention provides a heating component and a method for manufacturing the same, a cooking utensil, and a cooking device. The heating component includes a first inorganic layer; a heating layer disposed on a surface of the first inorganic layer; the heating layer contains metal particles and an oxide matrix; and a second inorganic layer disposed on a surface of the heating layer away from the first inorganic layer, wherein the heating layer includes a first region, within which the metal particles are concentrated in a region of the first region that is away from the first inorganic layer and the second inorganic layer, and the oxide matrix is ​​concentrated in regions on both sides of the first region that are close to the first inorganic layer and the second inorganic layer. The heating component has high heating efficiency, good heating effect, high safety, and can improve the overall mechanical properties of the heating component.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking equipment, and in particular to a heating component and a manufacturing method thereof, a cooking utensil and a cooking device. Background Art

[0002] As living standards improve, healthy eating has become a crucial issue closely linked to human health. Inorganic materials such as glass, ceramics, and quartz are highly trusted by consumers due to their excellent health properties. Cooking utensils such as ceramic stew pots, ceramic liners, glass health pots, and quartz teapots are extremely popular in the market. However, glass itself is not magnetic and cannot be heated electromagnetically. Therefore, how to effectively integrate these products with existing magnetic heating technology has become a pressing challenge for product developers.

[0003] Currently, the more mature technology involves adding heating tubes or heating plates to glass and ceramic products. However, the contact area between the heating layer and the glass or ceramic is small, resulting in low heat transfer efficiency and a long boiling time for all-glass kettles. Alternatively, thick-film circuits, tin oxide conductive layers, or thermal spray heating layers can be printed on glass and ceramic products. However, this technology requires high-temperature resistance from glass and ceramic products, and the high current generated when these products break poses significant safety risks and a poor user experience.

[0004] Therefore, the related technology of existing cooking utensils still needs to be improved. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, one object of the present invention is to provide a heating component with high heating efficiency, good heating effect, high safety, or improved overall mechanical properties of the heating component.

[0007] In one aspect of the present invention, a heating component is provided, comprising a first inorganic layer; a heating layer disposed on a surface of the first inorganic layer; the heating layer containing metal particles and an oxide matrix; and a second inorganic layer disposed on a surface of the heating layer away from the first inorganic layer; wherein the heating layer comprises a first region, wherein within the first region, the metal particles are concentrated in a region of the first region between the first and second inorganic layers, away from the first and second inorganic layers, and the oxide matrix is ​​concentrated in regions on both sides of the first region close to the first and second inorganic layers. As a result, the heating component has high heating efficiency, good heating effect, high safety, and can improve the overall mechanical properties of the heating component.

[0008] According to an embodiment of the present invention, in the first region, the content of the metal particles in the middle region is higher than that in the two side regions, and the content of the oxide matrix in the middle region is lower than that in the two side regions.

[0009] According to an embodiment of the present invention, in the first region, the metal particles are all arranged in the middle region of the first region, and the regions on both sides of the first region close to the first inorganic layer and the second inorganic layer are composed of the oxide matrix.

[0010] According to an embodiment of the present invention, the oxide matrix is ​​embedded in the first inorganic layer and the second inorganic layer, and the heat generating layer is connected to the first inorganic layer and the second inorganic layer through the oxide matrix.

[0011] According to an embodiment of the present invention, the heat-generating layer further includes a second region, and in the second region, the first inorganic layer and the second inorganic layer are connected via the oxide matrix.

[0012] According to an embodiment of the present invention, the metal particles are aggregated to form a plurality of aggregates, and the aggregates are connected by the oxide matrix.

[0013] According to an embodiment of the present invention, the aggregates are arranged along a direction parallel to the first inorganic layer or the second inorganic layer.

[0014] According to an embodiment of the present invention, the melting temperature of at least one of the metal particles and the oxide matrix is ​​less than or equal to 900°C.

[0015] According to an embodiment of the present invention, the metal particles include at least one of silver, copper, and aluminum.

[0016] According to an embodiment of the present invention, the material forming the oxide matrix includes at least one of SiO 2 , Bi 2 O 3 , Al 2 O 3 , B 2 O 3 , ZnO, TiO 2 and Na 2 O.

[0017] According to an embodiment of the present invention, the heat generating layer further includes a third region, and in the third region, the roughness at the connection interface between the heat generating layer and the first inorganic layer and the second inorganic layer is different.

[0018] According to an embodiment of the present invention, the sheet resistance of the heating layer is 0.1 mΩ / sq to 19 mΩ / sq.

[0019] According to an embodiment of the present invention, the heating layer includes a first glaze layer, a heating layer and a second glaze layer, the first glaze layer is arranged on a surface of the first inorganic layer, the heating layer is arranged on a surface of the first glaze layer away from the first inorganic layer, and the second glaze layer is arranged on a surface of the heating layer away from the first glaze layer, wherein at least part of the metal particles are distributed in the heating layer, and at least part of the oxide matrix is ​​distributed in the first glaze layer, the second glaze layer and the heating layer.

[0020] According to an embodiment of the present invention, within the first region, the heating layer is arranged in the middle region of the first region, the first glaze layer and the second glaze layer are arranged in the two side regions of the first region, the metal particles are enriched in the heating layer, and the oxide matrix is ​​enriched in the first glaze layer and the second glaze layer.

[0021] According to an embodiment of the present invention, the metal particles are all concentrated in the heating layer, and the first glaze layer and the second glaze layer are composed of the oxide matrix.

[0022] According to an embodiment of the present invention, the metal particles in the heating layer are configured into a mesh structure, the oxide matrix in the heating layer is distributed in the mesh structure, and the oxide matrix in the heating layer is connected to at least one of the first glaze layer and the second glaze layer.

[0023] According to an embodiment of the present invention, there are pores at the connection interfaces between the heating layer and the first glaze layer and the second glaze layer.

[0024] According to an embodiment of the present invention, the surface of the first glaze layer close to the heating layer and / or the surface of the second glaze layer close to the heating layer has a protrusion, the protrusion is embedded in the heating layer, and the protrusion is connected to at least one of the metal particles and the oxide matrix in the heating layer.

[0025] According to an embodiment of the present invention, the heating layer satisfies at least one of the following conditions: the thickness of the second glaze layer is less than the thickness of the first glaze layer; the thickness of the heating layer is greater than the thickness of at least one of the first glaze layer and the second glaze layer.

[0026] According to an embodiment of the present invention, the heating layer satisfies at least one of the following conditions: the thickness of the first glaze layer is 0.1 μm to 5 μm; the thickness of the second glaze layer is 0.1 μm to 5 μm; the thickness of the heating layer is 10 μm to 25 μm.

[0027] According to an embodiment of the present invention, the thickness of the first inorganic layer is less than or equal to the thickness of the second inorganic layer.

[0028] According to an embodiment of the present invention, the thickness of the first inorganic layer is 0.3 mm to 1.5 mm; the thickness of the second inorganic layer is 2 mm to 5 mm.

[0029] In another aspect of the present invention, a method for manufacturing the aforementioned heating component is provided, comprising: forming a heating layer on a surface of a first inorganic layer; and forming a second inorganic layer on a surface of the heating layer remote from the first inorganic layer, so as to obtain the heating component. Thus, this method has a simple and convenient manufacturing process, is easy to implement, and is amenable to industrial production with a high yield. The heating component can effectively produce the aforementioned heating component, which has high heating efficiency, good heating effect, high safety, and can improve the overall mechanical properties of the heating component.

[0030] According to an embodiment of the present invention, the heating layer is formed by integral sintering.

[0031] According to an embodiment of the present invention, the step of forming a heating layer on a surface of a first inorganic layer includes: forming a first glaze layer on a surface of the first inorganic layer; forming a heating layer on a surface of the first glaze layer away from the first inorganic layer; forming a second glaze layer on a surface of the heating layer away from the first glaze layer, so as to obtain the heating layer, wherein at least part of the metal particles are distributed in the heating layer, and at least part of the oxide matrix is ​​distributed in the first glaze layer, the second glaze layer and the heating layer.

[0032] In another aspect, the present invention provides a cooking appliance comprising: a container body; and a container bottom, the container bottom being connected to the container body and forming a storage space. The container bottom includes the aforementioned heating element, or a heating element produced by the aforementioned method, with the first inorganic layer of the heating element being located on a side facing the storage space. Thus, the container bottom of the cooking appliance including the aforementioned heating element provides high heating efficiency, excellent heating effect, high safety, and a good user experience. Furthermore, the cooking appliance possesses all the features and advantages of the aforementioned heating element, which will not be further elaborated here.

[0033] According to an embodiment of the present invention, the thickness of the first inorganic layer of the heat-generating component is less than or equal to the thickness of the second inorganic layer, and the first inorganic layer is located on the side facing the accommodating space.

[0034] According to an embodiment of the present invention, the surface of the second inorganic layer in the cooking utensil away from the heating layer is configured as the outer surface of the bottom of the container, and the second inorganic layer is connected to the container body.

[0035] In another aspect, the present invention provides a cooking device comprising the aforementioned cooking apparatus. Thus, the cooking device has high heating efficiency, good heating effect, high safety, and a good user experience. Furthermore, the cooking device possesses all the features and advantages of the aforementioned heating components, which will not be further elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic cross-sectional view of a heating component according to an embodiment of the present invention is shown.

[0037] Figure 2 A schematic cross-sectional structure diagram of a heating component according to another embodiment of the present invention is shown.

[0038] Figure 3 A schematic cross-sectional view of a heating component according to another embodiment of the present invention is shown.

[0039] Figure 4 A partial structural schematic diagram of a heating component according to another embodiment of the present invention is shown.

[0040] Figure 5 A schematic cross-sectional view of a heating component according to an embodiment of the present invention is shown.

[0041] Figure 6 A schematic flow chart of a method for manufacturing a heat-generating component according to an embodiment of the present invention is shown.

[0042] Figure 7 A schematic flow chart showing the steps of forming a heat-generating layer on a surface of a first inorganic layer according to one embodiment of the present invention.

[0043] Figure 8 A schematic structural diagram of a heating component according to an embodiment of the present invention is shown.

[0044] Figure 9 A schematic structural diagram of a cooking appliance according to an embodiment of the present invention is shown.

[0045] Figure 10 A partial structural schematic diagram of a cooking appliance according to an embodiment of the present invention is shown.

[0046] Reference numerals:

[0047] 10: Heating element 11: Container body 12: Container bottom 20: Heating layer 100: First inorganic layer 200: First glaze layer 201: Metal particles 202: Oxide matrix 203: First region 204: Second region 205: Third region 300: Heating layer 400: Second glaze layer 500: Second inorganic layer 600: Protrusion D1: Thickness of the first glaze layer D2: Thickness of the second glaze layer D3: Thickness of the heating layer D5: Thickness of the first inorganic layer D4: Thickness of the second inorganic layer DETAILED DESCRIPTION

[0048] Below describe in detail embodiments of the present invention, the example of described embodiment is shown in the accompanying drawings, wherein identical or similar reference numerals represent identical or similar elements or elements with identical or similar functions throughout. The embodiment described below by reference to the accompanying drawings is exemplary, is intended to be used for explaining the present invention, and is not to be construed as limiting the present invention. In the embodiment, if no specific technology or condition is indicated, it is carried out according to the technology or condition described in the document in this area or according to the product specification. Reagents used or instruments are not indicated by manufacturers, and are conventional products that can be obtained commercially.

[0049] In one aspect of the present invention, the present invention provides a heating component. According to an embodiment of the present invention, referring to Figure 1The heating component 10 includes a first inorganic layer 100, a heating layer 20 and a second inorganic layer 500; wherein the heating layer 20 is arranged on a surface of the first inorganic layer 100; the heating layer 20 contains metal particles 201 and an oxide matrix 202; the second inorganic layer 500 is arranged on the surface of the heating layer 20 away from the first inorganic layer 100, wherein the heating layer 20 includes a first region 203, within the first region 203, the metal particles 201 are enriched in the middle region of the first region 203 away from the first inorganic layer 100 and the second inorganic layer 500, and the oxide matrix 202 is enriched in the two side regions of the first region 203 close to the first inorganic layer 100 and the second inorganic layer 500. When heating is performed through the heating layer, the heat emitted by the heating layer 20 needs to be transferred to the medium to be heated (such as water to be heated or food to be cooked, etc., which will not be repeated later) through the inorganic layer on one side, that is, the first inorganic layer 100 or the second inorganic layer 500, so that the heating efficiency of the heating component is high, and the first inorganic layer and the second inorganic layer can protect the heating layer to a certain extent, preventing the heating layer from corrosion, cracking and other phenomena during use, with high safety, and can also isolate the erosion of water and oxygen on the heating layer to a certain extent, making the heating layer less prone to abnormal conditions such as oxidation and reaction failure, thereby extending the service life of the heating component; and the metal particles and oxide matrix are provided in the heating component, on the one hand, which can make the heating layer better bonded to the first inorganic layer and the second inorganic layer, and can also reduce the contact between the heating layer and the first inorganic layer. The thermal expansion coefficient at the interface between the inorganic layer and the second inorganic layer enhances the bonding strength between the heating layer and the first inorganic layer and the second inorganic layer, thereby improving the overall mechanical properties of the heating component. On the other hand, it further increases the thermal resistance between the heating layer and the inorganic layer, which helps to reduce the heat transfer rate when the heating layer generates heat, thereby increasing the uniformity of heat transfer generated by the heating layer, making it less likely for large internal stress to be generated inside the heating component, and less likely for stress concentration to occur in the inorganic layer, thereby further reducing the risk of rupture of the heating component, thereby better improving the service life of the heating component. In addition, it further increases the thermal resistance between the heating layer and the inorganic layer, which helps to further reduce the heat transfer rate when the heating layer generates heat. When the heating component is used to heat media such as water to be heated or food to be cooked, it can better reduce noise during heating.

[0050] It is understandable that the materials constituting the first inorganic layer and the second inorganic layer are not particularly limited and can be composed of the same material, such as both ceramic, both glass (which can be microcrystalline glass, high borosilicate glass, etc.), and both quartz. The first inorganic layer and the second inorganic layer can also be composed of different materials. According to other embodiments of the present invention, the material of the first inorganic layer is glass (which can be microcrystalline glass, high borosilicate glass, etc.), and the material of the second inorganic layer is ceramic. The above only provides the materials of the first inorganic layer and the second inorganic layer in some specific embodiments of the present invention and is not intended to limit the present invention.

[0051] According to an embodiment of the present invention, referring to Figure 1 In the first region 203, the content of the metal particles in the middle region is higher than that in the two side regions, and the content of the oxide matrix in the middle region is lower than that in the two side regions. The metal particles are enriched in the middle region, which can further increase the thermal resistance between the heating layer and the first inorganic layer and the second inorganic layer. At this time, heat is generated in the middle region, which improves the heating efficiency. The generated heat is transferred to the two side regions. Due to the presence of higher thermal resistance in the two side regions, the risk of rupture of the heating component is further reduced, and the service life of the heating component is better improved. In addition, there are also a small amount of metal particles in the two side regions, which can make the two side regions have certain heating and thermal conductivity properties, reduce the unevenness of heat transfer from the middle region to the two side regions, reduce the risk of rupture of the heating component, and improve the service life of the heating component.

[0052] According to an embodiment of the present invention, referring to Figure 1 The oxide matrix 202 is embedded in the first inorganic layer 100 and the second inorganic layer 500, and the heating layer 20 is connected to the first inorganic layer 100 and the second inorganic layer 500 through the oxide matrix 202. Therefore, the bonding force between the heating layer and the first and second inorganic layers can be further increased, and the heating area between the heating layer and the first and second inorganic layers can be increased, thereby further reducing the risk of a large decrease in heat transfer rate due to thermal resistance, and improving the uniformity of heat transfer, thereby reducing the risk of rupture of the heating component.

[0053] According to an embodiment of the present invention, within the first region, the metal particles are all disposed in the central region of the first region, and the regions on both sides of the first region near the first inorganic layer and the second inorganic layer are composed of the oxide matrix. This further improves heating efficiency and increases the thermal resistance between the heating layer and the first and second inorganic layers, thereby further reducing the risk of rupture of the heating component and improving the service life of the heating component.

[0054] According to an embodiment of the present invention, referring to Figure 2 The heating layer further includes a second region 204, within which the first inorganic layer 100 and the second inorganic layer 500 are directly connected via the oxide matrix 202. Thus, on the one hand, the bonding strength between the heating layer and the first and second inorganic layers can be further enhanced; on the other hand, the risk of cracking within the heating layer due to loose connection between the metal particles and the oxide matrix can be compensated, thereby improving the heating efficiency of the heating component and enabling the metal particles to generate heat evenly, thereby reducing the risk of cracking of the heating component due to concentrated heating.

[0055] According to an embodiment of the present invention, the metal particles gather to form a plurality of aggregates, and the aggregates are connected by the oxide matrix, thereby enabling the metal particles to generate heat better and more evenly, further reducing the risk of rupture of the heating component due to concentrated heating.

[0056] According to an embodiment of the present invention, the aggregate is arranged along a direction parallel to the first inorganic layer or the second inorganic layer (it can be understood that the aggregate is arranged along a direction parallel to the first inorganic layer or the second inorganic layer means that the direction in which the aggregate is arranged is parallel to the first inorganic layer or the second inorganic layer, which means that the two are basically parallel, not completely parallel). As a result, the uniformity of heating of the first inorganic layer or the second inorganic layer can be better improved to avoid local concentrated heating.

[0057] According to an embodiment of the present invention, the melting temperature of the metal particles or oxide matrix can be less than or equal to 900°C, specifically 100°C, 200°C, 300°C, 400°C, 500°C, 600°C, 700°C, 800°C, 850°C, 900°C, etc. In this way, in the subsequent process of making the heating layer, the metal particles and the oxide matrix can be added to the heating layer by sintering treatment, so that the metal particles or the oxide matrix can be evenly distributed in the heating layer during the sintering treatment, and the produced heating layer is not prone to reaction failure.

[0058] According to an embodiment of the present invention, the metal particles include at least one of silver, copper, and aluminum. This not only can better improve the thermal efficiency of the heating layer, but also can further stabilize the performance of the heating layer and reduce the risk of abnormalities such as oxidation and reaction failure.

[0059] According to an embodiment of the present invention, the material forming the oxide matrix includes at least one of silicon oxide (SiO2), bismuth oxide (Bi2O3), aluminum oxide (Al2O3), boron oxide (B2O3), zinc oxide (ZnO), sodium oxide (Na2O) and titanium oxide (TiO2). In this way, the oxide matrix is ​​enriched in the first glaze layer and the second glaze layer. The first glaze layer and the second glaze layer are very close to the composition of the material for making the inorganic layer, and both are inorganic compounds. Therefore, the interface bonding strength between the first glaze layer and the first inorganic layer, and the second glaze layer and the second inorganic layer can be further enhanced, thereby further improving the overall mechanical properties of the heating component. At the same time, the material source is wide, easy to obtain, and the cost is low.

[0060] According to an embodiment of the present invention, referring to Figure 2 The heating layer 20 further includes a third region 205. Within the third region 205, the roughness of the interface between the heating layer 20 and the first inorganic layer 100 and the second inorganic layer 500 is different. The different roughness at the interface between the heating layer and the first inorganic layer and at the interface between the heating layer and the second inorganic layer results in different heated areas on both sides of the heating layer, thereby improving the heating efficiency of the first inorganic layer or the second inorganic layer and promoting better heat transfer.

[0061] It can be understood that in the heating layer, the positions of the first area, the second area and the third area may partially overlap, may not overlap, or may completely overlap. Those skilled in the art can flexibly choose according to actual conditions, and will not be elaborated here.

[0062] According to an embodiment of the present invention, the square resistance of the heating layer can be 0.1mΩ / sq~20mΩ / sq, specifically 0.1mΩ / sq, 0.5mΩ / sq, 1mΩ / sq, 3mΩ / sq, 5mΩ / sq, 10mΩ / sq, 15mΩ / sq, 20mΩ / sq, etc. Within this square resistance range, the heating component can be used at a higher power, with higher thermal efficiency, better heating effect, and further improved safety.

[0063] According to an embodiment of the present invention, referring to Figure 3The heating layer 20 includes a first glaze layer 200, a heating layer 300 and a second glaze layer 400, wherein the first glaze layer 200 is arranged on a surface of the first inorganic layer 100, the heating layer 300 is arranged on the surface of the first glaze layer 200 away from the first inorganic layer 100, and the second glaze layer 400 is arranged on the surface of the heating layer 300 away from the first glaze layer 200, at least part of the metal particles 201 are distributed in the heating layer 300, and at least part of the oxide matrix 202 is distributed in the first glaze layer 200, the second glaze layer 400 and the heating layer 300. A structure of multi-layer materials is adopted. When heating is performed through the heating layer, the heat emitted by the heating layer 300 needs to be transferred to the medium to be heated (such as water to be heated or food to be cooked, etc., which will not be repeated later) through the glaze layer and the inorganic layer on one side, that is, the first glaze layer 200, the first inorganic layer 100 or the second glaze layer 400, the second inorganic layer 500, so that the heating efficiency of the heating component is high, and the first inorganic layer, the first glaze layer and the second inorganic layer, and the second glaze layer can protect the heating layer to a certain extent, and prevent the heating layer from corrosion, cracking and the like during use, with high safety, and can also isolate the heating layer from the erosion of water and oxygen to a certain extent, so that the heating layer is not prone to abnormal conditions such as oxidation and reaction failure, thereby extending the service life of the heating component; the provision of the first glaze layer or the second glaze layer in the heating component can make the heating layer better bonded to the first inorganic layer and the second inorganic layer; and the heating layer contains part The metal particles, the first glaze layer, the second glaze layer and the heating layer contain a part of the oxide matrix, which can further reduce the thermal expansion coefficient at the interface between the heating layer and the glaze layer, further enhance the bonding strength between the heating layer and the glaze layer, thereby better improving the overall mechanical properties of the heating component; on the other hand, it will further increase the thermal resistance between the heating layer and the inorganic layer, which helps to reduce the heat transfer rate when the heating layer generates heat, and increase the uniformity of the heat transfer generated by the heating layer, making it less likely to generate large internal stress inside the heating component, and it is also less likely to generate stress concentration in the inorganic layer, further reducing the risk of rupture of the heating component, thereby better improving the service life of the heating component, in addition, it will further increase the thermal resistance between the heating layer and the inorganic layer, which helps to further reduce the heat transfer rate when the heating layer generates heat. When the heating component is used to heat media such as water to be heated or food to be cooked, it can better reduce the noise during heating.

[0064] It is understood that the material of the heating layer can be a magnetically sensitive metal material. In this way, the cooking utensils can be heated using magnetically sensitive heating technology, solving the problem that ceramic materials themselves are not magnetically conductive. According to some embodiments of the present invention, the type of metal material is not particularly limited, and those skilled in the art can select it as needed. For example, it can be silver, aluminum, copper, etc. According to some embodiments of the present invention, the heating layer can be a silver film. For example, a silver film can be applied to the bottom of the cooking utensil to form the heating layer. The thickness and shape of the silver film are not particularly limited, and those skilled in the art can flexibly select it based on actual conditions.

[0065] According to an embodiment of the present invention, within the first region, the heating layer is disposed in the middle region of the first region, and the first and second glaze layers are disposed on either side of the first region. The metal particles are concentrated in the heating layer, and the oxide matrix is ​​concentrated in the first and second glaze layers. This further increases the thermal resistance between the heating layer and the first and second inorganic layers, thereby further reducing the risk of cracking the heating component and improving its service life.

[0066] According to an embodiment of the present invention, the metal particles are all concentrated in the heating layer, and the first glaze layer and the second glaze layer are composed of the oxide matrix. The metal particles are all enriched in the heating layer, which can make the heating concentrate in the middle area of ​​the heating component, improve the heating efficiency, and the metal particles are not distributed in the first glaze layer and the second glaze layer, which can further increase the thermal resistance between the heating layer and the first inorganic layer and the second inorganic layer, thereby further reducing the risk of rupture of the heating component and better improving the service life of the heating component; in addition, the first glaze layer and the second glaze layer are composed of the oxide matrix, which can further enhance the interface bonding strength between the first glaze layer and the first inorganic layer, and between the second glaze layer and the second inorganic layer.

[0067] According to an embodiment of the present invention, referring to Figure 4 The metal particles 201 in the heating layer 300 can be configured into a mesh structure (not shown in the figure), and the oxide matrix 202 in the heating layer 300 is distributed in the mesh structure. The oxide matrix 202 in the heating layer 300 is connected to the first glaze layer 200 or the second glaze layer 400. In this way, the heating layer can be better bonded to the first glaze layer or the second glaze layer, further enhancing the bonding strength between the heating layer and the first glaze layer or the second glaze layer, thereby further improving the overall mechanical properties of the heating component; at the same time, it can also further increase the heat conduction of the heating component, thereby achieving higher heating efficiency, more uniform heating, and better heating effects.

[0068] According to an embodiment of the present invention, referring to Figure 3The connection interface between the heating layer 300 and the first glaze layer 200 and the second glaze layer 400 has pores (not shown in the figure), thereby further increasing the thermal resistance between the heating layer and the first glaze layer and the second glaze layer. When the heating layer generates heat, it helps to further reduce the heat transfer rate, so that when the heating component is used to heat media such as water to be heated or food to be cooked, the noise during heating can be better reduced.

[0069] According to an embodiment of the present invention, referring to Figure 3 , the second glaze layer 400 may have a first through hole (not shown in the figure) for placing the heating layer 300, and the heating layer 300 is located in the first through hole and in contact with the second inorganic layer 500. The above-mentioned arrangement can further enhance the bonding strength between the heating layer, the second glaze layer, and the second inorganic layer, thereby further improving the overall mechanical properties of the heating component; when the second inorganic layer is thicker than the first inorganic layer, heat accumulation is likely to occur in the second inorganic layer due to the higher thickness of the second inorganic layer, and if the first inorganic layer is used to transfer heat to a medium such as water to be heated or food to be cooked, heat accumulation is more likely to occur in the second inorganic layer. The above-mentioned arrangement can reduce the thermal resistance on the side of the second inorganic layer, thereby reducing the risk of heat accumulation in the second inorganic layer, reducing the risk of rupture of the heating component, and better improving the service life of the heating component.

[0070] According to an embodiment of the present invention, referring to Figure 5 The surface of the first glaze layer 200 close to the heating layer 300 and / or the surface of the second glaze layer 400 close to the heating layer 300 may have a protrusion 600, and the protrusion 600 is embedded in the heating layer 300, and the protrusion 600 is connected to the metal particles 201 or the oxide matrix 202 in the heating layer 300 (it should be noted that the figure shows that both the first glaze layer and the second glaze layer have protrusions on their surfaces, which will not be repeated later). The protrusions are arranged in the heating layer to form an "anchor" structure, which further enhances the bonding strength between the heating layer and the first glaze layer and the second glaze layer, thereby further improving the overall mechanical properties of the heating component; at the same time, it can also further increase the heat conduction of the heating component, thereby making the heating efficiency higher, the heating more uniform, and the effect better.

[0071] According to an embodiment of the present invention, referring to Figure 3The thickness D2 of the second glaze layer can be less than the thickness D1 of the first glaze layer. In this way, when the heating component is used to heat the medium that needs to be heated, when the first glaze layer is thicker, the thermal resistance of the first glaze layer is increased, the heat transfer efficiency on one side of the first glaze layer is reduced, and the noise when the heating component is heating is further reduced; when the second glaze layer is thinner, the accumulation of heat in the second inorganic layer can be reduced, especially when the thickness of the second inorganic layer is greater than the thickness of the first inorganic layer, due to the larger thickness of the second inorganic layer, when the first inorganic layer is used to transfer heat to a medium such as water to be heated or food to be cooked, heat accumulation is more likely to occur in the second inorganic layer. The above-mentioned setting method can reduce the thermal resistance on one side of the second inorganic layer, thereby reducing the risk of heat accumulation in the second inorganic layer, reducing the risk of rupture of the heating component, and better improving the service life of the heating component.

[0072] According to an embodiment of the present invention, referring to Figure 3 The thickness D3 of the heating layer is greater than the thickness of at least one of the first glaze layer and the second glaze layer. Thus, when the heating component is used to heat a medium to be heated, the thickness of the heating layer is set to be greater than the thickness of the first glaze layer or the second glaze layer, thereby increasing the thermal efficiency of the heating layer and improving the heating effect. Furthermore, by reducing the thickness of the first and second glaze layers, the thermal resistance formed by the first and second glaze layers is not excessively high, thereby reducing the risk of rupture of the heating component and further improving safety.

[0073] According to an embodiment of the present invention, specifically, the thickness D1 of the first glaze layer can be 0.1μm~5μm, specifically 0.1μm, 0.2μm, 0.3μm, 0.4μm, 5μm, etc.; the thickness D2 of the second glaze layer can also be 0.1μm~5μm, specifically 0.1μm, 0.2μm, 0.3μm, 0.4μm, 5μm, etc. The thickness D1 of the first glaze layer and the thickness D2 of the second glaze layer are more appropriate, so that the heat generated during the heating process of the heating component can be quickly transferred to the first inorganic layer or the second inorganic layer through the first glaze layer or the second glaze layer, and then transferred to the medium to be heated, further improving the heating efficiency of the heating component.

[0074] According to an embodiment of the present invention, the thickness D3 of the heating layer can be 10μm to 25μm, specifically 10μm, 15μm, 20μm, 23μm, 25μm, etc. The thickness D3 of the heating layer is more appropriate, which can make the thermal efficiency of the heating layer higher, the heating effect better, and the safety further improved.

[0075] According to an embodiment of the present invention, referring to Figure 3The heating layer 300 may further include a second through hole (not shown), with the first glaze layer 200 or the second glaze layer 400 further located in the second through hole, and the first glaze layer 200 connected to the second glaze layer 400 via the second through hole. This further enhances the bonding strength between the heating layer, the first glaze layer, and the second glaze layer, thereby further improving the overall mechanical properties of the heating component. It also further increases the heat conduction of the heating component, resulting in higher heating efficiency, more uniform heating, and better heating results.

[0076] According to an embodiment of the present invention, referring to Figure 3 , the thickness D5 of the first inorganic layer may be no greater than the thickness D4 of the second inorganic layer. Thus, the heating component is used to heat the medium to be heated. Setting the thickness of the first inorganic layer to be no greater than the thickness of the second inorganic layer allows the heat generated by the heating layer to be effectively conducted through the first inorganic layer to heat the medium to be heated, rather than being easily conducted through the thicker second inorganic layer into the air or to other objects in contact with the second inorganic layer. This further improves heating efficiency, further enhances the heat utilization rate of the heating component, and provides a better user experience.

[0077] According to an embodiment of the present invention, the thickness D5 of the first inorganic layer can be 0.3mm~1.5mm. The thickness of the first inorganic layer is thin, and the heat generated by the heating layer can be conducted to the medium to be heated more quickly through the first inorganic layer. Even if the first inorganic layer is composed of glass, ceramic, quartz, etc. with low thermal conductivity, the heat can be conducted more quickly, which is beneficial to improving the utilization rate of heat and reducing unnecessary waste. According to other specific embodiments of the present invention, the thickness D5 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm, 330mm, 340mm .8mm, 0.9mm, 1mm, 1.2mm, 1.4mm, 1.5mm, etc.; in addition, the thickness D4 of the second inorganic layer can be 2mm~5mm, specifically 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm, etc. In this way, when the thickness of the second inorganic layer is within the above range, it can achieve rapid heating of the medium to be heated in the cooking utensil while preventing overheating of the bottom and improving the overall mechanical properties of the heating component, thereby preventing the heating component from being damaged by collision and cracking during use, thereby extending its service life.

[0078] It should be noted that the first inorganic layer and the second inorganic layer in the present invention are only used to distinguish the two inorganic layers on both sides of the heating layer, and should not be understood as limiting the characteristics of the stacking order of the first inorganic layer and the second inorganic layer in the heating component. Specifically, the positions of the first inorganic layer and the second inorganic layer can be interchangeable. Taking thickness as an example, the thickness of the first inorganic layer can be greater than or less than the second inorganic layer. When the heating component is used in a cooking utensil, the side with the smaller thickness can be arranged on the inner side of the cooking utensil.

[0079] According to an embodiment of the present invention, the heating component can be applied to cooking utensils such as an induction cooker microcrystalline pot, an electric rice cooker, a ceramic stew pot, a glass health pot, and a quartz teapot.

[0080] In another aspect of the present invention, the present invention provides a method for manufacturing the aforementioned heating component. According to an embodiment of the present invention, referring to Figure 6 , the method comprising:

[0081] S100: forming a heat-generating layer on one surface of the first inorganic layer;

[0082] S200: forming a second inorganic layer on a surface of the heat-generating layer away from the first inorganic layer, so as to obtain a heat-generating component.

[0083] According to an embodiment of the present invention, the specific process for forming the heating layer and the second inorganic layer described above may include conventional processes, such as spraying processes, etc. The specific process conditions and parameters for forming the heating layer and the second inorganic layer may all be conventional process conditions and parameters, which will not be elaborated here. The operation is simple, convenient, easy to implement, easy to industrialize, and the heating component described above can be effectively produced; and the heating component prepared by the aforementioned method has high heating efficiency, good heating effect, and high safety, and can make the heating layer and the first inorganic layer and the first inorganic layer better bonded together, further enhancing the bonding strength between the heating layer and the first inorganic layer and the first inorganic layer, thereby further improving the overall mechanical properties of the heating component.

[0084] According to an embodiment of the present invention, the heating layer is formed by integral sintering, which makes the operation simple, convenient, easy to implement, and easy to industrialize.

[0085] According to an embodiment of the present invention, referring to Figure 7 The step of forming a heat-generating layer on one surface of the first inorganic layer includes:

[0086] S101: forming a first glaze layer on one surface of the first inorganic layer;

[0087] Specifically, the first inorganic layer can be made of high borosilicate glass, and a first glaze layer is prepared on the surface of the first inorganic layer. The materials forming the first glaze layer include bismuth oxide, silicon oxide, aluminum oxide, and boron oxide. The inorganic materials such as bismuth oxide, silicon oxide, aluminum oxide, and boron oxide are ball-milled. After milling, a certain proportion of organic solvent (such as a ratio of organic solvent to inorganic material of 9:1) is added to form a first glaze slurry. The first glaze slurry can then be coated on the surface of the first inorganic layer in a specific pattern, and then surface dried at a surface drying temperature of 100-200°C and a surface drying time of 10-30 minutes. The first glaze layer is then formed after drying at a drying temperature of 550-650°C and a drying time of 10-30 minutes.

[0088] It is understandable that the coating method is not particularly limited. For example, coating can be performed by screen printing, spin coating, and other processes, which will not be elaborated here.

[0089] S102: forming a heating layer on a surface of the first glaze layer away from the first inorganic layer;

[0090] Specifically, a heating layer is formed on the surface of the first glaze layer. The materials forming the heating layer include metal, inorganic glaze, and organic solvent. The metal can be silver, copper, aluminum, etc., and the inorganic glaze can be inorganic materials such as bismuth oxide, silicon oxide, aluminum oxide, and boron oxide. The metal, inorganic glaze, and organic solvent are mixed in a certain proportion to form a heating layer slurry. For example, the heating layer slurry can be silver paste, and the solid content of the silver paste can be 60-90%. The silver paste includes metallic silver, inorganic glaze, and organic solvent. The main components of the inorganic glaze are silicon oxide, aluminum oxide, and bismuth oxide. The organic solvent is an alcohol. The ratio of metal to inorganic glaze and organic solvent can be 7:2:1 (the organic solvent in the slurry evaporates after curing). The heating layer slurry is then coated on the first inorganic layer using a specific pattern, and then surface dried at a surface drying temperature of 100-200°C and a surface drying time of 10-30 minutes. The surface drying is then dried at a drying temperature of 500-600°C and a drying time of 10-30 minutes. After drying, the heating layer is formed.

[0091] S103: forming a second glaze layer on a surface of the heating layer away from the first glaze layer to obtain the heating layer, wherein at least a portion of the metal particles are distributed in the heating layer, and at least a portion of the oxide matrix is ​​distributed in the first glaze layer, the second glaze layer, and the heating layer.

[0092] Specifically, the second glaze layer is formed on the surface of the heating layer in the same manner as in S101, i.e., inorganic materials such as bismuth oxide, silicon oxide, aluminum oxide, and boron oxide are ball-milled. After milling, a certain proportion of organic solvent (e.g., a ratio of organic solvent to inorganic material of 9:1) is added to form a second glaze slurry. The second glaze slurry can then be applied to the surface of the heating layer in a specific pattern, followed by surface drying at a surface drying temperature of 100-200°C and a surface drying time of 10-30 minutes. The second glaze layer is then dried at a drying temperature of 550-650°C and a drying time of 10-30 minutes. After drying, the second glaze layer is formed.

[0093] The second inorganic layer can also be made of high borosilicate glass. The second inorganic layer is connected to the second glaze layer in the heating layer, pressed and sintered. During sintering, the temperature is raised to 150℃ and kept warm for 10-30 minutes, then raised to 150℃ and kept warm for 10-30 minutes, and then raised to 650-700℃ and kept warm for 10-30 minutes, and then naturally cooled down until it is completely cooled to obtain a heating component. During the sintering process, the second glaze layer on the surface of the heating layer is first softened, and the second inorganic layer in contact with it is wetted, so that the second glaze layer and the second inorganic layer are bonded, and then solidified after cooling to form a heating component (refer to Figure 8 ), and the thickness of the obtained heating layer can be 10-25um.

[0094] According to an embodiment of the present invention, a heating layer slurry can be printed on a surface of a first inorganic layer, and a heating layer is formed after sintering; the heating layer is then disposed on a second inorganic layer to form a heating component. The heating component manufactured using this method has high heating efficiency, good heating effect, and high safety, and can reduce the risk of rupture of the heating component, thereby increasing the service life of the heating component. Preferably, a first glaze slurry can also be printed on a surface of the first inorganic layer, and a first glaze layer is formed after sintering; a heating layer slurry can be printed on the surface of the first glaze layer, and a heating layer is formed after sintering; a second glaze slurry is printed on the surface of the heating layer, and a second glaze layer is formed after sintering; the second glaze layer is then disposed on the second inorganic layer to form a heating component. Compared with the above-mentioned heating component that only has a heating layer, the heating component obtained by the preparation process of forming the first glaze layer and the second glaze layer has higher heating efficiency, better heating effect, and higher safety, and the heating layer and the first inorganic layer and the second inorganic layer are better bonded together through the first glaze and the second glaze, further enhancing the bonding strength between the heating layer and the first inorganic layer and the second inorganic layer, thereby further improving the overall mechanical properties of the heating component and further reducing the risk of rupture of the heating component, thereby better improving the service life of the heating component.

[0095] According to a more specific embodiment of the present invention, the first glaze slurry forming the first glaze layer and the second glaze layer slurry forming the second glaze layer have the same composition, both including inorganic glaze and organic solvent, the organic solvent is alcohol, and the inorganic glaze mainly includes silicon oxide, bismuth oxide, aluminum oxide, titanium oxide, boron oxide, zinc oxide, and others are calcium oxide, magnesium oxide, iron oxide, potassium oxide, lithium oxide and other inevitable impurities.

[0096] A first glaze slurry is printed on a surface of the first inorganic layer by screen printing, and the surface is dried at a temperature of 140°C, and then sintered at a sintering temperature of 500-650°C to form a first glaze layer; a heating layer slurry is printed on a surface of the first glaze layer away from the first inorganic layer by screen printing, and sintered at a sintering temperature of 550-650°C to form a heating layer; a second glaze slurry is printed on the surface of the heating layer by screen printing, and sintered at a sintering temperature of 500-650°C to form a second glaze layer, and then the second glaze layer is arranged on the second inorganic layer, and the second glaze layer is softened by heating to a temperature of 550-650°C, so as to wet the second inorganic layer in contact with it, so that the second glaze layer and the second inorganic layer are bonded, and then solidified after cooling to form a heating component.

[0097] It is understood that the process of forming the first glaze layer may also be: after printing the first glaze slurry on the surface of the first inorganic layer, first performing a low-temperature baking process to dry the surface, printing the heating layer slurry, and then sintering the two together to form the first glaze layer. The process of forming the second glaze layer may also be: after printing the heating layer slurry on the surface of the first glaze layer, first performing a low-temperature baking process to dry the surface, printing the second glaze slurry, and then sintering the two together to form the second glaze layer.

[0098] In another aspect of the present invention, the present invention provides a cooking utensil. Figure 9The cooking utensil includes a container body 11 and a container bottom 12, wherein the container bottom 12 is connected to the container body 11 and forms a storage space (not shown in the figure). The container bottom 12 includes the heating element 10 described above or the heating element 10 produced by the method described above, and the first inorganic layer (not shown in the figure) of the heating element 10 is located on the side facing the storage space. In this way, the heat conduction and radiation inside the cooking utensil are fast, so that the temperature inside the cooking utensil can be quickly increased, reducing heat accumulation, thereby improving cooking efficiency, good cooking effect, and good safety. In addition, compared with the traditional solution of providing a heating layer on the bottom of a glass or ceramic cooking utensil, the cooking utensil of the present invention, due to the first and second inorganic layers, can directly serve as the container bottom of a cooking utensil made of glass or ceramic. Therefore, while ensuring the overall thickness of the cooking utensil container bottom, the heat loss of the heating element can be reduced, further improving heating efficiency, and further reducing the noise generated by the heating element when heating.

[0099] It is understood that the material of the container bottom and the container body can be the same, both of which are inorganic materials such as ceramic, glass, and quartz. In the prior art, in order to ensure the strength of the container bottom, the thickness of the container bottom cannot be set too thin. Therefore, a large part of the heat generated by the heating layer cannot be effectively utilized, resulting in low thermal efficiency. In the present invention, by preparing an independent heating component, the heating component has a multi-layer structure, including a first inorganic layer, a first glaze layer, a heating layer, a second glaze layer, and a second inorganic layer arranged in a stacked manner. Because it is an independent heating component, the process is no longer limited by the overall structure of the cooking device. The thickness of the first inorganic layer near the storage space can be reduced to a certain extent, that is, the first inorganic layer can be relatively thin. As a result, the heat transfer path generated by the heating layer to the container storage space can be shortened, ensuring heating efficiency. In addition, the first inorganic layer provided on the heating layer can also prevent the heating layer from directly contacting the food to be heated, appropriately reducing the rate of heat transfer to the food to be heated, thereby further helping to reduce the noise generated by the rapid transfer of heat to the storage space. In addition, the heating layer in the prior art is mostly arranged on the outside of the bottom plate of the container, and the heat generated by the heating layer must be transferred to the containing space through the bottom plate. When the heat transfer rate of the bottom plate is low, heat accumulation is likely to occur in the bottom plate and cracks are caused. The heating component in the present application arranges the heating layer between the first inorganic layer and the second inorganic layer. On the one hand, it shortens the transfer path of the heat generated by the heating layer to the containing space, and the heat transfer speed is faster, which can better improve the heating efficiency and achieve high-power heating. On the other hand, the second inorganic layer can also play a certain heat insulation effect, reduce the heat loss of the heating layer, and make most of the heat generated by the heating layer transferred to the containing space, and only a small part of the heat is transferred to one side of the second inorganic layer, so that more heat can be transferred to the food that needs to be cooked. Not only is the heat utilization rate higher, but also the risk of heat accumulation in the second inorganic layer is reduced. This can not only reduce the risk of rupture of the heating component, but also improve the heating efficiency and the service life of the cooking appliance. In addition, the second inorganic layer can be relatively thick, which not only can achieve better thermal insulation effect, but also can ensure the overall strength of the heating component, reduce the risk of the heating component breaking under cold and hot shock or external force, and at the same time it is also conducive to promoting more heat to be transferred to the first inorganic layer, and achieve better thermal insulation and noise reduction effect. At the same time, it is also conducive to promoting more heat to be transferred to the first inorganic layer, and achieve better thermal insulation and noise reduction effect. Its overall thickness is adjustable and can adapt to the container body, which is conducive to better combination of the heating component and the container body; and, the heating component is used to form the main structure of the bottom of the container of the cooking utensil, the overall strength of the bottom of the container can be provided by the second inorganic layer, and the first inorganic layer can be set to a thinner thickness, that is, the thickness of the first inorganic layer can be less than the thickness of the bottom of the container in the prior art, which is conducive to improving the utilization rate of heat and reducing unnecessary heat loss.

[0100] It is understandable that the container body and the heating component can be combined by welding (fusion welding) or bonding, or other methods, as long as the container body and the heating component can be well combined.

[0101] It can be understood that the cooking utensils prepared using the heating components described above can be electromagnetically heated in an alternating magnetic field. At a household frequency of 20KHz and a voltage of 220V, the cooking utensils can be heated at a power of 1500 to 1800W. Specifically, when the cooking utensils are heated, the heating layer in the heating component generates eddy currents in the magnetic field. The eddy currents cause the free electrons in the material at the bottom of the container to alternate in a vortex shape, and the Joule heat of the current causes the bottom of the container to heat up, resulting in high heating efficiency, good heating effect, and high safety.

[0102] According to an embodiment of the present invention, the thickness of the first inorganic layer of the heating component is less than or equal to the thickness of the second inorganic layer, and the first inorganic layer is located on the side facing the accommodating space, so that the heat generated by the heating layer can be quickly and effectively conducted through the first inorganic layer to heat the medium to be heated, and the set first inorganic layer can reduce the rate of heat transfer and reduce the noise generated by the rapid transfer of heat to the accommodating space; and most of the heat of the heating layer is transferred into the accommodating space at a faster speed, and only a small part of the heat is transferred to one side of the second inorganic layer. The thermal conductivity of the second inorganic layer is low, which reduces the risk of rupture of the heating component and improves the heating efficiency and the service life of the cooking appliance.

[0103] According to an embodiment of the present invention, referring to Figure 10 The surface of the second inorganic layer 500 in the cooking utensil away from the heating layer 300 can be configured as the outer surface of the container bottom 12, and the second inorganic layer 500 is connected to the container body 11. In addition, the surface of the first inorganic layer 100 away from the heating element can be configured as the inner surface of the container bottom 12. In this way, both the inner and outer surfaces of the cooking utensil are inorganic layers, making the cooking utensil easy to clean, safe to use, and providing a good user experience.

[0104] It is understandable that the method of connecting the container body and the second inorganic layer is not particularly limited. For example, welding, bonding, packaging and other processes can be used, which will not be described in detail here.

[0105] According to an embodiment of the present invention, the cooking utensil can be a full-glass kettle or a full-glass pot. This can meet most cooking needs. In addition to the heating component described above, the above-mentioned cooking utensil can also include the structures that conventional cooking utensil should have, which will not be described in detail here.

[0106] In another aspect of the present invention, a cooking device is provided. According to an embodiment of the present invention, the cooking device comprises the aforementioned cooking utensil. The cooking device has high heating efficiency, good cooking effect, and good safety.

[0107] According to an embodiment of the present invention, the above cooking device may include, in addition to the aforementioned cooking utensils, structures that a conventional cooking device should have, which will not be described in detail here.

[0108] The present invention will be described below by specific examples, and it will be appreciated by those skilled in the art that the following specific examples are merely for illustrative purposes and are not intended to limit the scope of the invention in any way. In addition, in the following examples, unless otherwise specified, the materials and equipment employed are all commercially available. If, in the following examples, specific processing conditions and treatment process are not clearly described, then conditions and methods well known in the art may be employed to process.

[0109] Example 1

[0110] The cooking utensil includes a main structure of a container bottom composed of a high borosilicate glass container body and a heating component. The first inorganic layer and the second inorganic layer are made of the same high borosilicate glass material. The thickness of the first inorganic layer is 0.5 mm, and the thickness of the second inorganic layer is 3 mm. A slurry for forming a heating layer is prepared, wherein the slurry for forming the heating layer includes silver powder, inorganic glaze and organic solvent, wherein the organic solvent is an alcohol. The slurry for forming the heating layer is printed on the first inorganic layer by screen printing and sintered at a temperature of 550-650°C to form a heating layer on the first inorganic layer. The heating layer finally formed includes 70% Silver powder and 30% inorganic oxides, where the mass percentage of each inorganic oxide component in the heating layer is: silicon oxide 9%, aluminum oxide 3%, bismuth oxide 12%, and other oxides such as boron oxide, titanium oxide, lithium oxide, potassium oxide, calcium oxide, magnesium oxide, and other unavoidable impurities account for 6%. The second inorganic layer and the heating layer are sintered at 500-600°C to form a heating element. The resulting heating layer has a thickness of 15μm. The silver powder is concentrated in the middle region of the heating layer, and the oxide matrix formed by sintering the inorganic glaze is concentrated in the heating layer on both sides of the first and second inorganic layers. The container body and the heating element are combined into a single unit by fusion welding.

[0111] Example 2

[0112] The cooking utensil includes a main structure of a container bottom composed of a high borosilicate glass container body and a heating component, the first inorganic layer and the second inorganic layer are made of the same high borosilicate glass material, the thickness of the first inorganic layer is 0.5 mm, and the thickness of the second inorganic layer is 3 mm, and a first glaze slurry for forming a first glaze layer and a second glaze slurry and a heating layer slurry for forming a second glaze layer are prepared respectively, wherein the first glaze slurry and the second glaze slurry have the same composition, the heating layer slurry includes silver powder, inorganic glaze and organic solvent, wherein the organic solvent is alcohol, the first glaze slurry is printed on the first inorganic layer by screen printing, and sintered at 600°C to form a first glaze layer, and then the heating layer slurry is printed on the surface of the first glaze layer by screen printing, and sintered at 560°C to form a heating layer, and then the second glaze slurry is printed on the surface of the heating layer by screen printing, and sintered at 580°C to form a second glaze layer, thereby forming a heating layer. The second inorganic layer is joined to the second glaze layer in the heating layer, pressed tightly, and sintered at 660°C to form a heating element. The first and second glaze layers formed by sintering each comprise 25% silicon oxide, 15% aluminum oxide, and 50% bismuth oxide, with other oxides such as boron oxide, titanium oxide, lithium oxide, potassium oxide, calcium oxide, magnesium oxide, and other unavoidable impurities accounting for 10%. The sintered heating layer comprises 70% silver powder and 30% inorganic oxides. The percentage of each component of the inorganic oxide in the heating layer is as follows: silicon oxide 7%, aluminum oxide 4%, bismuth oxide 12%, and other oxides such as boron oxide, titanium oxide, lithium oxide, potassium oxide, calcium oxide, magnesium oxide, and other unavoidable impurities accounting for 7%. The heating layer has a thickness of 18 μm. Silver powder is concentrated in the heating layer, and the oxide matrix formed by sintering the first and second glaze slurries is concentrated in the first and second glaze layers. The container body and the heating element are welded together to form a single unit.

[0113] Comparative Example 1

[0114] The high borosilicate glass kettle is integrally formed, and the thickness of the bottom of the container is 3 mm. An electromagnetic layer is prepared on the side of the bottom of the container away from the accommodating space. The material is a silver film, and the thickness is consistent with that of Example 1.

[0115] Performance Testing

[0116] Water boiling time: Measure 1000mL of tap water and boil it at 1200W. The water is considered boiled when the temperature reaches above 95 degrees. See Table 1 below for test results.

[0117] Maximum temperature difference test: Use temperature inspection instrument to detect temperature, and place points at the bottom center, 1 / 4 from the center, 1 / 2 from the center, 3 / 4 from the center, and the edge of the bottom plate to detect the maximum temperature difference

[0118] Noise test: Specific test method: Fill the glass with water according to the maximum scale line, boil the water at the maximum power, and test the average sound power during the boiling process

[0119] Life test: Specific test method: put 600ml of water in the cup, boil it at the maximum power, pour out the water after completion, add 600ml again, and repeat this process for one cycle. Continue boiling water for aging and test the life.

[0120] Table 1 Water boiling time of samples

[0121] Water boiling time Maximum temperature difference noise Service life Example 1 7min10s 120℃ 57dB 8200 times Example 2 7min20s 110℃ 57dB 8130 times Comparative Example 1 14 minutes and 50 seconds 180℃ 56dB 4200 times

[0122] It can be seen from the test data in the table that the boiling time of the comparative sample at a power of 1200W is significantly longer than the boiling time of the sample using the heating component of the present invention in combination with the container body at the same power. The main reason is that the heat generated by the heating layer in the comparative example needs to be conducted through the thicker bottom of the container, and the thermal efficiency is relatively low; and the temperature difference during the heating process is small, and the service life is longer, and the maximum temperature difference of the comparative sample is significantly greater than the maximum temperature difference of the sample using the heating component of the present invention in combination with the container body, which reduces the service life of the comparative example.

[0123] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0124] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0125] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0126] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0127] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0128] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A heating component, characterized in that: include: a first inorganic layer; a heat-generating layer, the heat-generating layer being disposed on one surface of the first inorganic layer; the heat-generating layer containing metal particles and an oxide matrix; and a second inorganic layer, the second inorganic layer being disposed on a surface of the heat-generating layer away from the first inorganic layer; The heating layer includes a first region, in which the metal particles are concentrated in the middle region of the first region away from the first inorganic layer and the second inorganic layer, and the oxide matrix is ​​concentrated in the two side regions of the first region close to the first inorganic layer and the second inorganic layer.

2. The heating component according to claim 1, characterized in that In the first region, the content of the metal particles in the middle region is higher than that in the two side regions, and the content of the oxide matrix in the middle region is lower than that in the two side regions.

3. The heating component according to claim 1, characterized in that In the first region, the metal particles are all arranged in the middle region of the first region, and the regions on both sides of the first region close to the first inorganic layer and the second inorganic layer are composed of the oxide matrix.

4. The heating component according to claim 1, characterized in that The oxide matrix is ​​embedded in the first inorganic layer and the second inorganic layer, and the heat generating layer is connected to the first inorganic layer and the second inorganic layer through the oxide matrix.

5. The heating component according to claim 1, characterized in that The heat generating layer further includes a second region, in which the first inorganic layer and the second inorganic layer are connected via the oxide matrix.

6. The heating component according to claim 1, characterized in that The metal particles aggregate to form a plurality of aggregates, and the aggregates are connected by the oxide matrix.

7. The heating component according to claim 6, characterized in that The aggregates are arranged in a direction parallel to the first inorganic layer or the second inorganic layer.

8. The heating component according to claim 1, characterized in that The melting temperature of at least one of the metal particles and the oxide matrix is ​​less than or equal to 900°C.

9. The heating component according to claim 1, characterized in that: The metal particles include at least one of silver, copper and aluminum.

10. The heating component according to claim 1, characterized in that: The material forming the oxide matrix includes at least one of SiO2, Bi2O3, Al2O3, B2O3, ZnO, TiO2 and Na2O.

11. The heating component according to claim 1, characterized in that: The heat generating layer further includes a third region, and in the third region, the roughness of the connection interface between the heat generating layer and the first inorganic layer and the second inorganic layer is different.

12. The heating component according to claim 1, characterized in that The sheet resistance of the heating layer is 0.1 mΩ / sq~19 mΩ / sq.

13. The heating component according to any one of claims 1 to 12, characterized in that: The heating layer includes a first glaze layer, a heating layer and a second glaze layer, the first glaze layer is arranged on a surface of the first inorganic layer, the heating layer is arranged on a surface of the first glaze layer away from the first inorganic layer, and the second glaze layer is arranged on a surface of the heating layer away from the first glaze layer, wherein at least part of the metal particles are distributed in the heating layer, and at least part of the oxide matrix is ​​distributed in the first glaze layer, the second glaze layer and the heating layer.

14. The heating component according to claim 13, characterized in that: In the first region, the heating layer is arranged in the middle region of the first region, the first glaze layer and the second glaze layer are arranged in the two side regions of the first region, the metal particles are enriched in the heating layer, and the oxide matrix is ​​enriched in the first glaze layer and the second glaze layer.

15. The heating component according to claim 13, characterized in that: The metal particles are all concentrated in the heating layer, and the first glaze layer and the second glaze layer are composed of the oxide matrix.

16. The heating component according to claim 13, characterized in that: The metal particles in the heating layer are configured into a network structure, the oxide matrix in the heating layer is distributed in the network structure, and the oxide matrix in the heating layer is connected to at least one of the first glaze layer and the second glaze layer.

17. The heating component according to claim 13, characterized in that: There are pores at the connection interfaces between the heating layer and the first glaze layer and the second glaze layer.

18. The heating component according to claim 13, characterized in that The surface of the first glaze layer close to the heating layer and / or the surface of the second glaze layer close to the heating layer has a protrusion, the protrusion is embedded in the heating layer, and the protrusion is connected to at least one of the metal particles and the oxide matrix in the heating layer.

19. The heating component according to claim 13, characterized in that The heating layer satisfies at least one of the following conditions: The thickness of the second glaze layer is smaller than the thickness of the first glaze layer; The thickness of the heating layer is greater than the thickness of at least one of the first glaze layer and the second glaze layer.

20. The heating component according to claim 13, characterized in that The heating layer satisfies at least one of the following conditions: The thickness of the first glaze layer is 0.1 μm to 5 μm; The thickness of the second glaze layer is 0.1 μm to 5 μm; The thickness of the heating layer is 10 μm to 25 μm.

21. The heating component according to claim 1, characterized in that The thickness of the first inorganic layer is less than or equal to the thickness of the second inorganic layer.

22. The heating component according to claim 21, characterized in that The thickness of the first inorganic layer is 0.3 mm to 1.5 mm; the thickness of the second inorganic layer is 2 mm to 5 mm.

23. A method for manufacturing the heating component according to any one of claims 1 to 22, characterized in that: include: forming a heat-generating layer on one surface of the first inorganic layer; A second inorganic layer is formed on a surface of the heat-generating layer away from the first inorganic layer, so as to obtain the heat-generating component.

24. The method according to claim 23, wherein The heating layer is formed by integral sintering.

25. The method according to claim 23, characterized in that The step of forming a heat-generating layer on one surface of the first inorganic layer comprises: forming a first glaze layer on one surface of the first inorganic layer; forming a heating layer on a surface of the first glaze layer away from the first inorganic layer; A second glaze layer is formed on the surface of the heating layer away from the first glaze layer to obtain the heat-generating layer, wherein at least part of the metal particles are distributed in the heating layer, and at least part of the oxide matrix is ​​distributed in the first glaze layer, the second glaze layer and the heating layer.

26. A cooking utensil, characterized in that: include: Container body; and The bottom of the container is connected to the container body and forms a accommodating space, and the bottom of the container includes the heating component according to any one of claims 1 to 22 or the heating component manufactured by the method according to any one of claims 23 to 25.

27. The cooking appliance according to claim 26, wherein The thickness of the first inorganic layer of the heat-generating component is less than or equal to the thickness of the second inorganic layer, and the first inorganic layer is located on a side facing the accommodation space.

28. The cooking appliance according to claim 27, wherein The heating layer includes a first glaze layer, a heating layer and a second glaze layer. The first glaze layer is arranged on a surface of the first inorganic layer, the heating layer is arranged on a surface of the first glaze layer away from the first inorganic layer, and the second glaze layer is arranged on a surface of the heating layer away from the first glaze layer. The surface of the second inorganic layer in the cooking utensil away from the heating layer is constructed as the outer surface of the bottom of the container, and the second inorganic layer is connected to the container body.

29. A cooking device, characterized in that: A cooking utensil comprising the cooking utensil according to any one of claims 26 to 28.

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