WO2024098621A1 - Pot lid assembly and cooking appliance - Google Patents

Abstract

The present application discloses a pot lid assembly and a cooking appliance. The pot lid assembly comprises an inner lid, a coil assembly, a thermal insulation base plate, a temperature-sensing color-change coating, and a thermal insulation cover plate; the inner lid is provided with a mounting space; the coil assembly is fixed in the mounting space, and the coil assembly comprises a coil winding; the thermal insulation base plate is arranged on the inner lid and is located below the coil assembly; the temperature-sensing color-change coating is arranged on the surface of the thermal insulation base plate and is adapted to change color after reaching a color-change temperature; the thermal insulation cover plate is arranged on the side of the inner lid facing a pot and is located below the thermal insulation base plate, and when the coil winding is powered on, the thermal insulation cover plate is heated.

Description

Pot cover assembly and cooking utensil

Priority information

This application claims priority and benefits of patent application No. 202223011808.9 filed with the State Intellectual Property Office of China on November 11, 2022, and the entire text of which is incorporated herein by reference.

Technical Field

The present application belongs to the field of household electrical appliances, and specifically, relates to a pot cover assembly and a cooking utensil.

Background technique

For existing cooking utensils, such as rice cookers, the temperature of the lid will rise during the cooking process or heat preservation process, especially the inner surface of the lid. When the lid is opened, if the inner surface of the lid is touched without knowing the temperature of the inner surface of the lid, there is a risk of scalding. As people's requirements for the safety and convenience of cooking utensils continue to increase, how to reduce the risk of scalding from cooking utensils needs further research.

Public Content

The present application aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one purpose of the present application is to provide a pot cover assembly and a cooking utensil, which uses the color change of the temperature-sensitive color-changing coating as a temperature warning to remind the user whether the temperature of the insulation cover is within a safe temperature range, thereby reducing the risk of scalding when performing operations such as cleaning the insulation cover.

In one aspect of the present application, the present application proposes a cooker cover assembly. According to an embodiment of the present application, the cooker cover assembly includes: an inner cover, a coil assembly, a heat-insulating seat plate, a temperature-sensitive color-changing coating and a heat-insulating cover plate, wherein the inner cover is provided with an installation space; the coil assembly is fixed in the installation space, and the coil assembly includes a coil winding; the heat-insulating seat plate is arranged on the inner cover and is located below the coil assembly; the temperature-sensitive color-changing coating is arranged on the surface of the heat-insulating seat plate and is suitable for changing color after its temperature reaches a color-changing temperature; the heat-insulating cover plate is arranged on the side of the inner cover facing the cooker and is located below the heat-insulating seat plate, and the heat-insulating cover plate is heated when the coil winding is energized.

Compared with the prior art, the cooker cover assembly can utilize the coil assembly to heat the heat preservation cover plate, and efficiently heat the food through the heat preservation cover plate, fully stimulating the Maillard reaction to achieve a better cooking effect. On the one hand, the temperature of the insulation base plate located between the insulation cover and the coil assembly can indirectly evaluate the temperature of the insulation cover. The color change of the thermochromic coating can be used as a temperature warning to remind the user whether the temperature of the insulation cover is within a safe temperature range, thereby reducing the risk of scalding when cleaning the insulation cover.

In addition, the cooker cover assembly according to the above embodiment of the present application may also have the following additional technical features:

Optionally, the coil assembly is used to generate eddy currents passing through the thermal insulation seat plate to heat the thermal insulation cover plate.

Optionally, the heat-insulating cover plate comprises a metal plate, and the metal plate generates heat by cutting the eddy current generated by the coil winding when the coil winding is energized.

Optionally, the thermal insulation cover plate further comprises a connecting piece, and the metal plate is detachably connected to the inner cover via the connecting piece.

Optionally, the surface of the temperature-sensitive color-changing coating is covered with a first hydrophobic layer, and the first hydrophobic layer is made of a transparent material.

Optionally, the thickness of the first hydrophobic layer is not greater than 0.1 mm.

Optionally, the cooker cover assembly further comprises: a surface coating, wherein the surface coating is disposed on the heat-insulating seat plate and is located on a side of the temperature-sensitive color-changing coating away from the cooker.

Optionally, the heat-insulating seat plate is a transparent seat plate, the temperature-sensitive color-changing coating is arranged on the surface of the heat-insulating seat plate away from the cooker, and the surface coating is arranged on the surface of the temperature-sensitive color-changing coating away from the cooker; and/or the thickness of the surface coating is not greater than 0.1 mm.

Optionally, the top coating is an abrasion and scratch resistant coating.

Optionally, the side of the top coating away from the cookware is covered with a second hydrophobic layer.

Optionally, the thickness of the second hydrophobic layer is not greater than 0.1 mm.

Optionally, the color saturation of the thermochromic coating changes reversibly with temperature.

Optionally, at least a portion of the temperature-sensitive color-changing coating is a reversible color-changing area, and the reversible color-changing area is a temperature-sensitive color-developing area, a temperature-sensitive color-eliminating area, or an interval temperature-sensitive color-developing area.

Optionally, the temperature-sensitive color-changing coating includes a plurality of color-changing sub-coatings arranged at intervals or in succession, and the color-changing temperatures of the plurality of color-changing sub-coatings are the same or different.

Optionally, the thermochromic coating comprises thermochromic ink.

Optionally, the color changing temperature of the thermochromic coating is 5 to 80 degrees Celsius.

Optionally, the thickness of the thermochromic coating is not greater than 0.1 mm.

Optionally, the area where the heat-insulating seat plate is in direct contact with the temperature-sensitive color-changing coating is a rough surface, and the rough surface is formed by roughening the surface of the heat-insulating seat plate.

Optionally, the roughness Ra of the rough surface is not less than 0.1 μm.

Optionally, the heat-insulating seat plate is an inorganic glass seat plate, a microcrystalline glass seat plate or a transparent resin seat plate; and/or the thickness of the heat-insulating seat plate is 2 to 5 mm.

Optionally, in the thickness direction of the inner cover, the distance between the thermal insulation seat plate and the coil winding is 5 to 30 mm; and/or the distance between the thermal insulation seat plate and the thermal insulation cover plate is 5 to 30 mm.

Optionally, the cooker cover assembly further comprises: a steam valve, the steam valve being arranged on the inner cover and being located at one side of the installation space; the heat preservation seat plate being arranged in the installation space and close to the steam valve, the coil assembly, the heat preservation cover plate and the steam valve forming a wrapping space, the heat preservation seat plate being placed in the wrapping space; the distance between the heat preservation seat plate and the heat preservation cover plate being less than or equal to the distance between the heat preservation seat plate and the coil winding. And/or, the heat preservation seat plate is brown.

Optionally, the installation space includes a first inner wall and a second inner wall, the first inner wall is formed into an arc shape, the second inner wall is formed into a plane, the second inner wall is connected to both ends of the first inner wall, the second inner wall is arranged adjacent to the steam valve, and the outer peripheral wall of the coil assembly is arranged in the shape of the installation space.

Optionally, a concave-convex pattern is provided on the surface of the heat-insulating cover plate facing the cooker, and the orthographic projection of the coil winding on the heat-insulating cover plate covers the concave-convex pattern.

According to another aspect of the present application, the present application proposes a cooking utensil. According to an embodiment of the present application, the cooking utensil includes the pot cover assembly described above. The features and effects described for the above-mentioned pot cover assembly are also applicable to the cooking utensil, and will not be repeated here. Compared with the prior art, the cooking utensil is not only simple in structure, but also safer. It can remind the user to pay attention to the risk of scalding when performing operations such as cleaning the cover based on the color change of the temperature-sensitive color-changing coating, and the user experience is better.

Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a front view of a cooker cover assembly according to an embodiment of the present application.

FIG. 2 is a top view of a cooker cover assembly according to an embodiment of the present application.

FIG. 3 is a partial structural exploded view of a cooker cover assembly according to an embodiment of the present application.

FIG. 4 is a schematic diagram of the structure of a temperature-sensitive color-changing coating and a top coating according to an embodiment of the present application.

FIG5 is a schematic structural diagram of a temperature-sensitive color-changing coating and a top coating according to yet another embodiment of the present application.

FIG. 6 is a schematic diagram of the exploded structure of a cooker cover assembly according to another embodiment of the present application.

Reference numerals:
10-inner cover; 11-installation space; 11a-first inner wall; 11b-second inner wall; 12-steam valve; 20-coil assembly; 21-
Coil winding; 22-coil bracket; 23-temperature sensor; 30-insulation seat plate; 31-temperature sensor avoidance hole; 40-temperature sensitive color-changing coating; 41-color-changing sub-coating; 50-insulation cover plate; 51-metal plate; 52-connector; 53-concave and convex pattern; 54-detection hole; 60-surface coating; 70-surface cover assembly; 71-display panel; 80-magnetic isolation sheet.

Detailed ways

The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "center", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application 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 cannot be understood as a limitation on the present application. In the description of the present application, "multiple" means at least two, such as two, three, etc., unless otherwise clearly defined and specifically defined. In the present application, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature 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 intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

In one aspect of the present application, a cooker cover assembly is proposed. According to the embodiments of the present application, with reference to FIGS. 1 to 6, the cooker cover assembly includes: an inner cover 10, a coil assembly 20, a heat preservation seat plate 30, a temperature-sensitive color-changing coating 40, and a heat preservation cover plate 50. The inner cover 10 is provided with an installation space 11; the coil assembly 20 is fixed in the installation space 11, and the coil assembly 20 includes a coil winding 21; the heat preservation seat plate 30 is provided on the inner cover 10 and is located below the coil assembly 20; the temperature-sensitive color-changing coating 4 ... The layer 40 is arranged on the surface of the heat preservation seat plate 30 and is suitable for changing color after its temperature reaches the color change temperature; the heat preservation cover plate 50 is arranged on the side of the inner cover 10 facing the pot and is located below the heat preservation seat plate 30, and the heat preservation cover plate 50 is heated when the coil winding 21 is energized. The heat preservation cover plate 50 is configured to be detachably connected to the inner cover. Compared with the prior art, the pot cover assembly can, on the one hand, use the coil assembly to heat the heat preservation cover plate, and efficiently heat the food through the heat preservation cover plate, fully stimulate the Maillard reaction, and achieve a better cooking effect. On the other hand, the temperature of the heat preservation seat plate located between the heat preservation cover plate and the coil assembly can indirectly evaluate the temperature of the heat preservation cover plate, and the color change of the temperature-sensitive color-changing coating can be used as a temperature warning to remind the user whether the temperature of the heat preservation cover plate is within the safe temperature range, thereby reducing the risk of scalding when the heat preservation cover plate is cleaned. It should be noted that the pot cover assembly can be either a part of the pot cover or a complete pot cover. In addition, it can be understood that the temperature-sensitive color-changing coating described in the present application is a reversible temperature-sensitive color-changing coating.

The cooker cover assembly of the above embodiment of the present application is described in detail below with reference to FIGS. 1 to 6 :

According to the embodiments of the present application, in order to heat the food in three dimensions and evenly heat the upper part of the food, thus fully stimulating the Maillard reaction and making the food more flavorful, conventional cooking equipment usually integrates a heating device on the cover. In the present application, a coil is provided on the cover, and the magnetic force generated when current flows to the coil is used to heat the thermal insulation cover, thereby increasing the temperature of the thermal insulation cover and indirectly heating the food. This enables the cooking device to obtain sufficient firepower, thereby achieving a better cooking effect on the food. Since the insulation cover is in direct contact with the steam or food in the cooker, it is usually necessary to clean the insulation cover after heating or insulation is completed. At this time, if the temperature of the insulation cover is high, it is easy to cause burns. By providing a temperature-sensitive color-changing coating on the insulation base plate arranged in the temperature field between the coil assembly and the insulation cover, the color-changing and reversible color-changing characteristics of the temperature-sensitive color-changing coating can be used as a temperature warning to remind the user whether the temperature of the insulation cover is within a safe temperature range, thereby reducing the risk of scalding. For example, a material such as color-changing ink that has a fixed and obvious color at room temperature and changes color significantly when a predetermined temperature (such as 45°C) is reached can be used to form a temperature-sensitive color-changing coating to remind the user whether there is a risk of scalding at the current temperature of the insulation cover. Therefore, during the cooking process, the coil assembly can be used to heat the insulation cover. During the heating process of the insulation cover, the temperature-sensitive color-changing coating in the temperature field between the insulation cover and the coil assembly also heats up. When the preset temperature is exceeded, the temperature-sensitive color-changing coating changes color. After the heating or insulation is completed, if the insulation cover needs to be cleaned, the insulation cover can be disassembled and the color of the temperature-sensitive color-changing coating can be observed. If the color of the temperature-sensitive color-changing coating is still the color displayed when there is a risk of scalding, it means that the insulation cover has not been fully cooled and there is still a risk of scalding if touched. If the color of the temperature-sensitive color-changing coating returns to the initial color or shows other safe colors, it means that the insulation cover has been cooled to a safe temperature range and there is no risk of scalding if the operation continues. That is, in the cooker cover assembly of the present application, the coil assembly 20 emits alternating electromagnetic waves that pass through the heat-insulating seat plate 30 to heat the heat-insulating cover plate 50. As the temperature of the heat-insulating cover plate increases, a temperature field is formed between the coil assembly and the heat-insulating cover plate, causing the temperature of the heat-insulating seat plate to increase, causing the temperature-sensitive color-changing coating on the surface of the heat-insulating seat plate to change color. When the heating is stopped, the heat-insulating seat plate is turned off. As the temperature of the thermal cover plate gradually decreases, the temperature of the thermal insulation base plate and the temperature-sensitive color-changing coating will also gradually decrease. The color change of the temperature-sensitive color-changing coating is reversible. It changes color after rising to the color change temperature, and returns to the original color when the temperature drops to the color change temperature. Therefore, the temperature-sensitive color-changing coating on the thermal insulation base plate can better reflect the temperature between the thermal insulation cover plate and the coil assembly, thereby reducing the risk of scalding.

According to the embodiment of the present application, referring to FIG. 6, the heat-insulating cover plate 50 may include a metal plate 51, and the metal plate 51 generates heat by cutting the eddy current generated by the coil winding 21 when the coil winding 21 is energized. In this way, the main body structure of the heat-insulating cover plate can be directly used to realize electromagnetic heating, and no other metal parts are required to cut the eddy current generated by the coil winding to generate heat and then indirectly heat or radiate the heat-insulating cover plate, thereby not only making the heating efficiency of the cover assembly higher, but also simplifying the cover structure, making the cover more integrated and having a smaller overall volume.

According to the embodiment of the present application, in combination with FIG. 3 and FIG. 6 , the heat-insulating cover plate 50 further includes a connector 52, and the metal plate 51 is detachably connected to the inner cover 10 via the connector 52, wherein the edge of the connector can be arranged in accordance with the shape of the edge of the inner cover, and can achieve the closure of the installation space 11 toward the side of the pot. In addition, at least a portion of the connector 52 can be made of a heat-insulating material, or can be provided with a heat-insulating component, thereby avoiding the risk of scalding caused by the excessive temperature of the metal plate when the high-temperature cover plate is disassembled.

According to the embodiments of the present application, it should be noted that the temperature-sensitive color-changing coating 40 is arranged in the visible area of the heat-insulating seat plate 30. That is, no matter whether the temperature-sensitive color-changing coating 40 is located on the surface of the heat-insulating seat plate 30 close to the pot or on the surface away from the pot, its color change can be seen after the heat-insulating cover plate is removed. In addition, the temperature-sensitive color-changing coating 40 can be arranged on at least a part of the surface of the side of the heat-insulating seat plate 30 facing the pot (here refers to the inner pot or other container for accommodating the food to be cooked); it can also be arranged on at least a part of the surface of the side of the heat-insulating seat plate 30 away from the pot (refer to Figure 4 or Figure 5 for understanding), in which case the heat-insulating seat plate is preferably made of a transparent material; or it can also be arranged on at least a part of the surface of the side of the heat-insulating seat plate 30 facing the pot and at least a part of the surface of the side away from the pot. The above three settings can achieve the visibility and stability of the color change of the temperature-sensitive color-changing coating.

According to an embodiment of the present application, referring to FIG. 4 or FIG. 5 , the orthographic projection of the temperature-sensitive color-changing coating 40 on the thermal insulation seat plate 30 can be located within the area where the thermal insulation seat plate 30 is located, thereby further ensuring the visibility of the temperature-sensitive color-changing coating.

According to the embodiment of the present application, when the temperature-sensitive color-changing coating 40 is exposed on the surface of the heat-insulating seat plate 30, the temperature-sensitive color-changing coating 40 can also be covered with a first hydrophobic layer (not shown) on the surface away from the heat-insulating seat plate 30, and at this time the first hydrophobic layer can be a transparent material. By adopting a transparent hydrophobic layer, on the one hand, it will not affect the visibility of the color change of the temperature-sensitive color-changing coating. On the other hand, it can also have a certain protective effect on the color-changing coating, which can prevent the color-changing pigment in the temperature-sensitive color-changing coating from evaporating during the cooking process, and can also reduce the negative impact of water vapor that may exist between the heat-insulating cover plate and the coil assembly during the cooking process on the temperature-sensitive color-changing coating. At the same time, it can also avoid the actual operation process (such as cleaning, In order to prevent the scratches and wear that may be caused to the thermochromic coating during installation or disassembly, the protective effect of the thermochromic coating and the stability of the use of the thermochromic coating can be ensured. Furthermore, the thickness of the hydrophobic layer may be no more than 0.1mm, for example, it may be 0.02mm, 0.04mm, 0.06mm, 0.08mm or 0.09mm, etc., thereby achieving the hydrophobic effect while avoiding the negative impact on the overall structure of the pot cover caused by the excessive thickness of the hydrophobic layer. Furthermore, when the surface of the thermochromic coating 40 is covered with a first hydrophobic layer, the projection of the thermochromic coating 40 on the first hydrophobic layer can be located in the area where the first hydrophobic layer is located, and its projection area on the first hydrophobic layer is smaller than the area of the first hydrophobic layer, thereby further ensuring the hydrophobic protection effect of the first hydrophobic layer on the thermochromic coating. In addition, when the first hydrophobic layer is set, there is no particular restriction on the type of the first hydrophobic layer, and technicians in this field can flexibly choose according to actual needs. For example, the first hydrophobic layer can be a hard layer, such as a hydrophobic layer with inorganic glass or hard plastic (such as polymethyl methacrylate, polycarbonate, etc.) as the matrix, or it can be a flexible film layer, such as a hydrophobic layer with polyethylene as the matrix, etc.

According to an embodiment of the present application, with reference to FIG. 4 or FIG. 5 , it can be understood that the pot cover assembly can also include: a topcoat 60, which can be provided on the heat-insulating seat plate 30 and located on the side of the temperature-sensitive color-changing coating 40 away from the pot. Among them, according to actual needs, the purpose of improving the wear resistance and scratch resistance or color development effect of the temperature-sensitive color-changing coating can be achieved by setting the topcoat. For example, the topcoat can be set to have a specific color (such as white or black, etc.), and the topcoat can be used to reduce the visual interference of the background color on the color change of the temperature-sensitive color-changing coating, so that the color change of the temperature-sensitive color-changing coating is more obvious. It should be noted that on the basis of achieving the expected effect, the color of the topcoat 60 is not particularly limited, and those skilled in the art can flexibly choose according to actual needs, for example, it can be black or white, etc.

According to an embodiment of the present application, when the heat preservation seat plate 30 is a transparent seat plate, the temperature-sensitive color-changing coating 40 can be arranged on the surface of the heat preservation seat plate 30 away from the side of the pot, and the surface coating 60 can be arranged on the surface of the temperature-sensitive color-changing coating 30 away from the side of the pot (refer to Figure 4 or Figure 5 for understanding), thereby enabling the surface coating to play a wear-resistant and scratch-resistant or other expected effect, and will not have an adverse effect on the color development effect of the temperature-sensitive color-changing coating. For example, according to a specific example of the present application, at this time, the surface coating 60 can be a wear-resistant and scratch-resistant coating, thereby not only improving the wear and scratch resistance of the temperature-sensitive color-changing coating, avoiding the scratches or wear that may be generated during the actual operation process (such as cleaning, installation or disassembly, etc.), but also having a certain protective effect on the stability of the temperature-sensitive color-changing coating, which can prevent the color-changing pigment in the temperature-sensitive color-changing coating from evaporating during the cooking process, and can also reduce the negative impact of the water vapor that may exist between the heat preservation cover plate and the coil assembly on the temperature-sensitive color-changing coating during the cooking process.

According to the embodiments of the present application, with reference to FIG. 4 or FIG. 5, it can be understood that the thickness of the top coating 60 may be no greater than 0.1 mm, for example, it may be 0.01 mm, 0.03 mm, 0.05 mm, 0.07 mm or 0.09 mm, etc. If the thickness of the top coating is too large, it may also increase the difficulty of connection and adhesion between it and the temperature-sensitive color-changing coating, affecting the structural stability and use stability of the coating; further, the thickness of the top coating 60 may also be no less than 0.01 mm. If the thickness of the top coating is too small, it is difficult to develop The expected effect will not be effectively exerted, for example, it will lead to insufficient wear and scratch resistance and/or insufficient shielding ability of the background color. By controlling the thickness of the top coating to be within the above-mentioned range, the expected effect can be better exerted while ensuring the difficulty of operation and the bonding strength.

According to an embodiment of the present application, when the top coating 60 is exposed on the surface of the temperature-sensitive color-changing coating 40 away from the cooker, the surface of the top coating 60 away from the cooker may also be covered with a second hydrophobic layer (not shown). By providing the second hydrophobic layer, it is possible to reduce the negative impact of water vapor that may exist between the thermal insulation cover and the coil assembly on the temperature-sensitive color-changing coating during cooking, and also to provide a certain protective effect on the top coating, thereby avoiding possible scratches and wear on the top coating during actual operation, thereby ensuring the protective effect of the top coating and the stability of use of the top coating; further, the thickness of the second hydrophobic layer may be no more than 0.1 mm, for example, it may be 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm or 0.09 mm, etc., thereby achieving a hydrophobic effect while avoiding the negative impact on the overall structure of the cooker cover caused by the excessive thickness of the hydrophobic layer. Further, when the surface of the top coating 60 is covered with a second hydrophobic layer, the projection of the top coating 60 on the second hydrophobic layer can be located in the area where the second hydrophobic layer is located, and its projection area on the second hydrophobic layer is smaller than the area of the second hydrophobic layer, thereby further ensuring the hydrophobic protection effect of the second hydrophobic layer on the top coating. In addition, when the second hydrophobic layer is provided, the type of the second hydrophobic layer is not particularly limited, and those skilled in the art can flexibly select it according to actual needs. For example, the second hydrophobic layer can be a hard layer, such as a hydrophobic layer with inorganic glass or hard plastic (such as polymethyl methacrylate, polycarbonate, etc.) as a matrix, or a flexible film layer, such as a hydrophobic layer with polyethylene as a matrix, etc.

According to the embodiments of the present application, it can be understood that when the temperature-sensitive color-changing coating 40 is in direct contact with the thermal insulation seat plate 30 or the top coating 60, an adhesive can be added to the coating to achieve mutual connection, or a separate adhesive layer can be set to achieve mutual connection. Correspondingly, the temperature-sensitive color-changing coating 40 and the first hydrophobic layer, as well as the top coating 60 and the second hydrophobic layer, can also be in direct or indirect contact through the adhesive in the coating or a separately set adhesive layer. There is no strict restriction in the present application, and technical personnel in this field can flexibly choose according to actual needs.

According to an embodiment of the present application, the temperature-sensitive color-changing coating 40 may include a color-changing pigment and a binder. Further, the temperature-sensitive color-changing coating 40 may also include a filler. Thus, the color-changing pigment can be used to provide a color-changing function for the temperature-sensitive color-changing coating. The binder can be either a binder or a bonding layer. When a binder is used, the color-changing pigment (and optional filler, etc.) can be mixed with the binder to form a bonding slurry, and then the temperature-sensitive color-changing coating is formed by coating, printing, etc.; when a bonding layer is selected, the color-changing pigment can be directly fixed to the surface of the insulation seat plate with the bonding layer to achieve the limiting and fixing of the color-changing pigment. At this time, the orthographic projection of the temperature-sensitive color-changing coating on the bonding layer should be located in the area defined by the bonding layer, and there may be a gap between the edge of the temperature-sensitive color-changing coating and the edge of the bonding layer.

In addition, it should be noted that the type of color-changing pigment in the present application is not particularly limited, and those skilled in the art can flexibly select from the existing color-changing pigments according to actual needs, for example, it can be a temperature-sensitive color-changing ink, that is, a temperature-sensitive color-changing ink. The color-changing coating 40 may include a temperature-sensitive color-changing ink. In addition, the color-changing mechanism of the color-changing pigment/ink is: when the temperature changes, the area provided with the color-changing pigment/ink (such as graphic information) can show different color effects according to different temperatures. For example, the color-changing pigment/ink can have a fixed and obvious color at room temperature, and can change color when reaching a predetermined temperature or above to show another color. When the temperature returns to room temperature, the color-changing pigment/ink also returns to the original color. Preferably, the color-changing pigment/ink can have a fixed and obvious color at room temperature, and when reaching a predetermined temperature, the color changes rapidly and has a clear color change boundary, and the color difference before and after the color change is large, and the influence of the external environment is small. The performance is stable in high temperature (such as 130 degrees Celsius), light, humidity and other atmospheres, and it does not decompose or fade.

According to the embodiments of the present application, the specific setting shape of the temperature-sensitive color-changing coating 40 is not particularly limited, and technical personnel in this field can flexibly select it according to actual needs. For example, it can be a regular or irregular graphic structure (such as an annular belt, an annular ring, a plurality of concentrically spaced annular rings, an exclamation mark, a flame graphic, etc.), or it can be a text structure (such as Chinese fonts or foreign words such as high temperature, hot, and attention), or it can be a composite structure of graphics and text, and so on.

According to the embodiment of the present application, the formation method of the temperature-sensitive color-changing coating 40 is not particularly limited, and those skilled in the art can flexibly select it according to actual needs, for example, it can be formed by coating, printing or transfer, etc. Preferably, the thermal stability temperature of the temperature-sensitive color-changing coating 40 can be not less than 130 degrees Celsius, so that it can withstand the high temperature of cooking without volatilization or decomposition during the cooking process of the pot.

According to an embodiment of the present application, the color saturation of the temperature-sensitive color-changing coating 40 can change reversibly with temperature changes. For example, by selecting existing color-changing pigments/inks, the higher the temperature, the darker the color displayed by the temperature-sensitive color-changing coating. This allows users to combine the overall color change and the color saturation change to more intuitively obtain the degree of temperature, thereby achieving a better temperature warning effect and preventing burns.

According to the embodiment of the present application, at least a portion of the temperature-sensitive color-changing coating 40 is a reversible color-changing area. It can be understood that the temperature-sensitive color-changing coating 40 can be a reversible color-changing area in its entirety or in part. For example, the temperature-sensitive color-changing coating 40 can include a reversible color-changing area and a fixed color area. When the color-changing temperature is not reached, the reversible color-changing area and the fixed color area can display the same color. When the reversible color-changing area reaches the color-changing temperature, the fixed color area remains unchanged, and the color of the reversible color-changing area changes to form the expected graphics or text in the fixed color area. Furthermore, the reversible color-changing area can be a temperature-sensitive color-developing area, a temperature-sensitive color-eliminating area, or an interval temperature-sensitive color-developing area. Among them, the temperature-sensitive color development area refers to the area where the reversible color-changing area appears colorless when the temperature is lower than the color-changing temperature, displays a specific color after the temperature is raised to the color-changing temperature (the specific display color and color-changing temperature depend on the color-changing pigment actually selected), and can be displayed as colorless again after cooling down. For example, the temperature-sensitive color development area can be displayed as colorless below 45 degrees Celsius, display a specific color after the temperature is raised to 45 degrees Celsius, and display as colorless again after cooling down below 45 degrees Celsius; the temperature-sensitive achromatic area refers to the area where the reversible color-changing area appears as a solid color below the color-changing temperature. The temperature-sensitive color-changing area refers to an area with a fixed color (the specific displayed color and color-changing temperature depend on the color-changing pigment actually selected), the color disappears after the temperature is raised to the color-changing temperature, and the original color is displayed again after the temperature is lowered. For example, the temperature-sensitive color-eliminating area can be displayed as a fixed color below 45 degrees Celsius, the original color disappears and is displayed as colorless after the temperature is raised to below 45 degrees Celsius, and it is displayed as the original color again after the temperature is lowered to below 45 degrees Celsius; the interval temperature-sensitive color-developing area refers to a reversible color-changing area that is displayed as a colorless state when it is below the color-changing temperature and above the color-changing temperature, and only displays a specific color within a preset temperature range (the specific displayed color and color-changing temperature range depend on the color-changing pigment actually selected). For example, the interval temperature-sensitive color-developing area can display color within the range of 33-47 degrees Celsius, and is displayed as a colorless state when it is below 33 degrees Celsius or above 47 degrees Celsius. The above three reversible color-changing areas can all realize the color change of the temperature-sensitive color-changing coating at a preset temperature, provide temperature warnings to users, and reduce the risk of burns. Furthermore, the reversible color changing area can be a temperature-sensitive color developing area or a temperature-sensitive color-eliminating area. For example, the temperature-sensitive color developing area can be preferably selected, thereby providing a more obvious color change warning effect.

According to an embodiment of the present application, with reference to FIG. 5 , it can be understood that the temperature-sensitive color-changing coating 40 may include a plurality of color-changing sub-coatings 41 arranged at intervals or in a continuous manner, and the color-changing temperatures of the plurality of color-changing sub-coatings 41 may be the same or different. Among them, the plurality of color-changing sub-coatings 41 may be arranged at intervals or in a continuous manner to form a specific color-changing pattern or text, or the plurality of color-changing sub-coatings may have different color-changing temperatures to form a plurality of color-changing warnings, so that the temperature-sensitive color-changing coating 40 may display different colors in different temperature ranges, so that the user may more accurately estimate the temperature range of the pot insulation cover according to the different color changes. Among them, each color-changing sub-coating 41 may independently make at least a portion of it a reversible color-changing zone, and the reversible color-changing zone may be selected as a temperature-sensitive color-developing zone, a temperature-sensitive color-eliminating zone, or an interval temperature-sensitive color-developing zone. According to the specific examples of the present application, multiple color-changing sub-coatings 41 can be arranged side by side, or can be arranged in a ring shape along the center of the heat-insulating seat plate 30, or can be multiple concentric circles or concentric rings arranged from the inside to the outside along the radial direction of the heat-insulating seat plate 30 (refer to Figure 5 for understanding), where the inside refers to the direction close to the center of the heat-insulating seat plate, and the outside refers to the direction away from the center of the heat-insulating seat plate. As mentioned above, the above three types of color-changing sub-coatings can also realize the color change of the temperature-sensitive color-changing coating at a preset temperature, provide temperature warnings to users, and reduce the risk of scalding. Preferably, the reversible color-changing area of at least one color-changing sub-coating 41 can be a temperature-sensitive color-changing area or a temperature-sensitive color-eliminating area, and more preferably a temperature-sensitive color-changing area, thereby providing a more obvious color change warning effect.

According to the embodiments of the present application, the color changing temperature of the thermochromic coating 40 can be controlled to an expected value by specific selection of thermochromic pigments or inks, for example, it can be controlled within a range of 5 to 80 degrees Celsius, such as 40 degrees Celsius, 41 degrees Celsius, 42 degrees Celsius, 43 degrees Celsius, 44 degrees Celsius or 45 degrees Celsius; according to the specific examples of the present application, the color changing temperature of the thermochromic coating 40 can be preferably made not higher than 45 degrees Celsius, and more preferably the color changing temperature can be controlled at 45 degrees Celsius. Under normal circumstances, the human body can withstand a temperature of 45 degrees Celsius, but if it exceeds 45°C, there will be an obvious scalding sensation. By controlling the color changing temperature to the above range, the purpose of reminding users to be careful of burns can also be achieved through color change warnings.

According to the embodiment of the present application, with reference to FIG. 4 or FIG. 5 , the thickness of the temperature-sensitive color-changing coating 40 may be no greater than 0.1 mm. For example, it can be 0.01mm, 0.03mm, 0.05mm, 0.07mm or 0.09mm, etc. If the thickness of the color-changing coating is too large, it may increase the connection strength and adhesion between it and the insulation seat plate or the surface coating, affecting the structural stability and use stability of the temperature-sensitive color-changing coating; further, the thickness of the temperature-sensitive color-changing coating 40 can also be not less than 0.005mm. If the thickness of the color-changing coating is too small, it may cause the color displayed after reaching the color-changing temperature to be relatively light, and the warning effect is not significant. By controlling the temperature-sensitive color-changing coating to be within the above-mentioned thickness range, an obvious color change warning can be obtained while taking into account the bonding strength.

According to the embodiments of the present application, the heat-insulating seat plate 30 can be made of a transparent material, thereby achieving a better decorative effect. For example, the heat-insulating seat plate 30 can be an inorganic glass seat plate, a microcrystalline glass seat plate, or a transparent resin seat plate, etc., which is conducive to ensuring the transparency of the heat-insulating seat plate, and also enables the transparent seat plate to have a certain strength to meet the use requirements in actual operation. Furthermore, the thickness of the heat-insulating seat plate 30 can be 2 to 5 mm, for example, it can be 2.5 mm, 3 mm, 3.5 mm, 4 mm or 4.5 mm, etc., thereby further ensuring the overall strength of the transparent seat plate, so that it has both good performance and safety performance.

According to the embodiments of the present application, considering that the thermal insulation seat plate 30, such as an inorganic glass seat plate, may have a problem of weak bonding strength with the coating, the area where the thermal insulation seat plate 30 is in direct contact with the temperature-sensitive color-changing coating 40 can also be made into a rough surface. The rough surface can be formed by roughening the surface of the thermal insulation seat plate, wherein the type of roughening treatment is not particularly limited, and can be achieved, for example, by pickling, plasma treatment or polishing, thereby further improving the adhesion between the temperature-sensitive color-changing coating and the surface of the thermal insulation seat plate, and improving its structural stability and use stability during use. Furthermore, the roughness Ra of the rough surface can be not less than 0.1μm, for example, can be not less than 0.2μm, 0.5μm or 0.8μm, etc., thereby further ensuring the bonding strength between the thermal insulation seat plate and the temperature-sensitive color-changing coating.

According to an embodiment of the present application, the thermal insulation cover 50 may have a hydrophobic surface on the side facing the cooker. The hydrophobic surface may be achieved by changing the surface shape of the thermal insulation cover or adding hydrophobic material to the thermal insulation cover by utilizing the hydrophobic property of the thermal insulation cover itself. Alternatively, a hydrophobic coating may be formed on the surface of the thermal insulation cover or a hydrophobic film layer may be attached to achieve the hydrophobic purpose. This can further reduce the probability of water vapor condensing and accumulating on the thermal insulation base plate, causing food to drip white.

According to an embodiment of the present application, the thermal insulation cover 50 may also be provided with a heat reflecting layer (not shown) on the side facing the cooker, wherein the heat reflecting layer may be formed by the main body structure of the thermal insulation cover or by an additional structural layer. By providing the heat reflecting layer, the thermal insulation effect may also be improved.

According to the embodiment of the present application, with reference to FIG6 , in the thickness direction of the inner cover 10 , the distance between the heat preservation seat plate 30 and the coil winding 21 is 5 to 30 mm, for example, 10 mm, 15 mm, 20 mm or 25 mm, etc.; the distance between the heat preservation seat plate 30 and the heat preservation cover plate 50 is 5 to 30 mm, for example, 10 mm, 15 mm, 20 mm or 25 mm, etc. By adopting the above arrangement, the temperature of the heat preservation seat plate and the temperature-sensitive color-changing coating can be closer to the temperature of the heat preservation cover plate, Thereby improving the sensitivity and reliability of the thermochromic coating.

According to the embodiment of the present application, with reference to FIG. 3 or 6, the cooker cover assembly may further include: a steam valve 12, which is arranged on the inner cover 10 and is located on one side of the installation space 11; a heat preservation seat plate 30 is arranged in the installation space 11 and close to the steam valve 12, the coil assembly 20, the heat preservation cover plate 50 and the steam valve 12 form a wrapping space, and the heat preservation seat plate 30 is placed in the wrapping space; the distance between the heat preservation seat plate 30 and the heat preservation cover plate 50 is less than or equal to the distance between the heat preservation seat plate 30 and the coil winding 21; wherein the heat preservation seat plate 30 is brown. Thus, the coil assembly, the heat preservation cover plate and the steam valve form a wrapping space, and the heat preservation seat plate is placed in the wrapping space, so that the temperature-sensitive color-changing coating on the heat preservation seat plate can better reflect the temperature inside the cover; wherein the heat preservation seat plate is closer to the heat preservation cover plate, and the temperature sensitivity of the temperature-sensitive color-changing coating to reflect the temperature of the heat preservation cover plate is improved. In addition, the heat preservation seat plate 30 can also be set to brown. The brown heat preservation seat plate has a better heat absorption effect and has better reliability when it serves as a high temperature warning for users. The brown heat preservation seat plate has a certain light transmittance, for example, the light transmittance can be not less than 40%, such as not less than 45%, not less than 50%, not less than 60%, not less than 70%, not less than 75% or not less than 80%, etc. Its material can be inorganic glass or organic glass, etc., for example, it can be brown glass. In addition, after the temperature-sensitive color-changing coating is formed on the surface of the brown heat preservation seat plate away from the pot, a surface coating can be further formed on the surface of the temperature-sensitive color-changing coating away from the pot according to actual needs, so as to achieve the expected purpose of improving the wear resistance and scratch resistance of the temperature-sensitive color-changing coating.

In this embodiment, the steam valve 12 and the coil assembly 20 are arranged in the same horizontal plane, and the steam valve 12 and the coil assembly 20 can be integrated and arranged inside the cover assembly at the same time, and the steam valve 12 and the coil assembly 20 are arranged in parallel, and the two will not interfere with each other. At present, when a coil is arranged in the cover of a cooking device, it is usually necessary to place the steam valve of the rice cooker externally, which not only makes the overall structure of the cover complex and large in size, but also makes the effect of the steam valve poor, affecting the cooking effect of the cooking device. In this application, by building the steam valve into the inner cover, the effect of the steam valve can be better, the integration of the cover assembly is higher, and the overall volume of the cooking device can be set smaller.

According to the embodiments of the present application, at present, the shape of the pot or inner pot (not shown in the figure) is generally circular, so that the heating effect of the cooking device is uniform. With reference to Figures 3 and 6, it can be understood that since the steam valve 12 and the coil assembly 20 are both arranged above the pot or inner pot, that is, the steam valve 12 and the installation space 11 for installing the coil assembly 20 are both arranged on the inner cover 10 corresponding to the pot or inner pot, and since the steam valve 12 is arranged on one side of the inner cover 10 and above the pot or inner pot, the steam valve 12 occupies a part of the circular portion of the inner cover 10 corresponding to the pot or inner pot. In order to make the installation space 11 larger, the installation space 11 will be arranged on the inner cover 10 except for the arrangement position of the steam valve 12. The shape of the installation space 11 is formed into a large cut circle. Thus, by configuring the installation space 11 to include the first inner wall 11a and the second inner wall 11b, the first inner wall 11a is formed into an arc shape, the second inner wall 11b is formed into a plane, the second inner wall 11b is connected to both ends of the first inner wall 11a, and the second inner wall 11b is arranged adjacent to the steam valve 12, the installation space 11 can be arranged with a larger area, thereby making the coil group in the installation space 11 The arrangement area of the coil winding 21 of the component 20 is larger, and the heat generated by the coil winding 21 after being energized can be more, which fully stimulates the Maillard reaction, so that the cooking effect of the cooking device is better. It should be noted that the coil component 20 also includes a coil bracket 22 for fixing and supporting the coil winding. By making the outer peripheral wall of the coil component 20 and the installation space 11 follow the shape, the coil bracket can be fitted with the outer peripheral wall of the installation space, and the setting stability of the coil bracket is better, and the coil bracket can be arranged in the entire installation space, thereby not only ensuring the stability of the overall structure and winding shape of the coil winding, so that the coil winding can stably form a magnetic field to heat the insulation cover, but also making the arrangement area of the coil winding in the installation space larger, and the heat generated by the coil winding after being energized can be more, which fully stimulates the Maillard reaction, so that the cooking effect of the cooking device is better.

According to an embodiment of the present application, with reference to FIG6 , it can be understood that a concave-convex pattern 53 may be further provided on the surface of the heat-insulating cover 50 facing the cooker, and the orthographic projection of the coil winding 21 on the heat-insulating cover 50 covers the concave-convex pattern 53. In this way, not only can the heat-receiving surface of the heat-insulating cover be increased by utilizing the concave-convex pattern, but also the heat-insulating cover at the concave-convex pattern can obtain sufficient heat, thereby reducing condensation water at the bottom of the heat-insulating cover, preventing condensation water from dripping onto food and affecting the taste of food, thereby ensuring the cooking effect of food.

According to the embodiment of the present application, with reference to FIG. 3 or FIG. 6, the cover assembly of the cooking device further includes a temperature sensor 23, which can be fixed on the coil support 22 and located in the inner circle space of the coil winding 21, so that the temperature sensor can be set at the center position of the inner cover to detect the temperature at the center position of the insulation cover plate. At this time, a temperature sensor avoidance hole 31 can be provided on the insulation seat plate 30, and optionally, a detection hole 54 can also be provided on the insulation cover plate 50, and the temperature sensor can stop at the detection hole 54 to detect the temperature of the insulation cover plate and the steam temperature. Furthermore, the temperature sensor can also be set away from the center of the coil winding 22 to simultaneously detect the temperature at the center position of the insulation cover plate and the steam temperature, and make full use of the winding space of the coil support.

According to an embodiment of the present application, with reference to Figure 6, it can be understood that the cooker cover assembly can also include a surface cover assembly 70 and a magnetic isolation sheet 80, wherein the surface cover assembly 70 can be located at the upper part of the overall structure of the cover assembly, and a display panel 71 can also be provided on the surface cover assembly 70, so that the user can control the operating status of the cooking device through the surface cover assembly, wherein the surface cover assembly 70 is detachably connected to the inner cover 10; the magnetic isolation sheet 80 can be arranged between the surface cover and the coil assembly 20 to isolate the radiation generated by the coil assembly, prevent the surface cover from being heated by the coil assembly, and ensure the operating stability of the electrical components integrated on the panel.

According to another aspect of the present application, a cooking utensil is proposed. According to an embodiment of the present application, the cooking utensil includes the pot cover assembly described above. Compared with the prior art, the cooking utensil is not only simple in structure, but also safer. It can remind users to pay attention to the risk of scalding when performing operations such as cleaning the cover based on the color change of the temperature-sensitive color-changing coating, and provide a better user experience. It should be noted that the specific type of the cooking utensil is not particularly limited, and those skilled in the art can flexibly choose according to actual needs. For example, it can include but is not limited to rice cookers, cooking machines or pressure cookers. Cooking equipment such as pots. According to a specific example of the present application, the cooking utensil may further include a base, an inner pot and a cover body, the base may be provided with a storage area for accommodating the inner pot, the area at the bottom of the base corresponding to the inner pot may be provided with a heating element such as a coil disk, the cover body is movably connected to the upper part of the base and may be covered on the inner pot, wherein the cover body may include the pot cover body assembly described above. In addition, the connection method between the base, the inner pot and the cover body may be the same as that of existing cooking utensils, which will not be described in detail here. In addition, it should be noted that the features and effects described for the above-mentioned pot cover body assembly are also applicable to the cooking utensil, which will not be described in detail here.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims (24)

1. A cooker cover assembly, comprising:

   An inner cover (10), wherein the inner cover (10) is provided with an installation space (11);

   A coil assembly (20), the coil assembly (20) being fixed in the installation space (11), the coil assembly (20) comprising a coil winding (21);

   A heat-insulating seat plate (30), the heat-insulating seat plate (30) being arranged on the inner cover (10) and located below the coil assembly (20);

   A temperature-sensitive color-changing coating (40), the temperature-sensitive color-changing coating (40) being disposed on the surface of the heat-insulating seat plate (30) and being adapted to change color when its temperature reaches a color-changing temperature;

   A heat-insulating cover plate (50) is arranged on a side of the inner cover (10) facing the cooker and is located below the heat-insulating seat plate (30); the heat-insulating cover plate (50) is heated when the coil winding (21) is energized.
2. The cooker cover assembly according to claim 1, wherein the coil assembly (20) is used to generate eddy currents to pass through the heat-insulating seat plate (30) to heat the heat-insulating cover plate (50); and/or,

   The heat-insulating cover plate (50) comprises a metal plate (51), and the metal plate (51) generates heat by cutting the eddy current generated by the coil winding (21) when the coil winding (21) is energized.
3. The cooker cover assembly according to claim 2, wherein the heat-insulating cover plate (50) further comprises a connecting piece (52), and the metal plate (51) is detachably connected to the inner cover (10) via the connecting piece (52).
4. The cooker cover assembly according to any one of claims 1 to 3, wherein the surface of the temperature-sensitive color-changing coating (40) is covered with a first hydrophobic layer, and the first hydrophobic layer is made of a transparent material.
5. The cooker cover assembly according to claim 4, wherein the thickness of the first hydrophobic layer is not greater than 0.1 mm.
6. The cooker cover assembly according to any one of claims 1 to 5, further comprising: a surface coating (60), wherein the surface coating (60) is provided on the heat-insulating seat plate (30) and is located on a side of the temperature-sensitive color-changing coating (40) away from the cooker.
7. The cooker cover assembly according to claim 6, wherein the heat-insulating seat plate (30) is a transparent seat plate, the temperature-sensitive color-changing coating (40) is provided on the surface of the heat-insulating seat plate (30) away from the cooker, and the top coating (60) is provided on the surface of the temperature-sensitive color-changing coating (40) away from the cooker; and/or,

   The thickness of the top coating (60) is no greater than 0.1 mm.
8. The cooker cover assembly according to claim 6 or 7, wherein the surface coating (60) is a wear-resistant and scratch-resistant coating.
9. The cooker cover assembly according to any one of claims 6 to 8, wherein the side of the surface coating (60) away from the cooker is covered with a second hydrophobic layer.
10. The cooker cover assembly according to claim 9, wherein the thickness of the second hydrophobic layer is not greater than 0.1 mm.
11. The cooker cover assembly according to any one of claims 1 to 10, wherein the color saturation of the temperature-sensitive color-changing coating (40) changes reversibly with temperature.
12. According to any one of claims 1 to 11, the cookware cover assembly, wherein at least a portion of the temperature-sensitive color-changing coating (40) is a reversible color-changing area, and the reversible color-changing area is a temperature-sensitive color-developing area, a temperature-sensitive color-eliminating area, or an interval temperature-sensitive color-developing area.
13. The cooker cover assembly according to any one of claims 1 to 12, wherein the temperature-sensitive color-changing coating (40) comprises a plurality of color-changing sub-coatings (41) arranged at intervals or in succession, and the color-changing temperatures of the plurality of color-changing sub-coatings (41) are the same or different.
14. The cooker cover assembly according to any one of claims 1 to 13, wherein the temperature-sensitive color-changing coating (40) comprises temperature-sensitive color-changing ink.
15. The cooker cover assembly according to any one of claims 1 to 14, wherein the color change temperature of the temperature-sensitive color-changing coating (40) is 5 to 80 degrees Celsius.
16. The cooker cover assembly according to any one of claims 1 to 15, wherein the thickness of the temperature-sensitive color-changing coating (40) is not greater than 0.1 mm.
17. According to any one of claims 1 to 16, the cooker cover assembly, wherein the area where the heat-insulating seat plate (30) is in direct contact with the temperature-sensitive color-changing coating (40) is a rough surface, and the rough surface is formed by roughening the surface of the heat-insulating seat plate (30).
18. The cooker cover assembly according to claim 17, wherein the roughness Ra of the rough surface is not less than 0.1 μm.
19. According to any one of claims 1 to 18, the heat-insulating seat plate (30) is an inorganic glass seat plate, a microcrystalline glass seat plate or a transparent resin seat plate; and/or the thickness of the heat-insulating seat plate (30) is 2 to 5 mm.
20. The cooker cover assembly according to any one of claims 1 to 19, wherein, in the thickness direction of the inner cover (10), the distance between the heat-insulating seat plate (30) and the coil winding (21) is 5 to 30 mm, and the distance between the heat-insulating seat plate (30) and the heat-insulating cover plate (50) is 5 to 30 mm.
21. The cooker cover assembly according to any one of claims 1 to 20, further comprising: a steam valve (12), the steam valve (12) being arranged on the inner cover (10) and located at one side of the installation space (11); the heat preservation seat plate (30) being arranged in the installation space (11) and close to the steam valve (12); the coil assembly (20), the The heat-insulating cover plate (50) and the steam valve (12) form a wrapping space, and the heat-insulating seat plate (30) is placed in the wrapping space; the distance between the heat-insulating seat plate (30) and the heat-insulating cover plate (50) is less than or equal to the distance between the heat-insulating seat plate (30) and the coil winding (21); and/or,

    The heat-insulating seat plate (30) is brown.
22. The cooker cover assembly according to claim 21, wherein the installation space (11) comprises a first inner wall (11a) and a second inner wall (11b), the first inner wall (11a) is formed into an arc shape, the second inner wall (11b) is formed into a plane, the second inner wall (11b) is connected to both ends of the first inner wall (11a), the second inner wall (11b) is arranged adjacent to the steam valve (12), and the outer peripheral wall of the coil assembly (20) is arranged in the shape of the installation space (11).
23. The cooker cover assembly according to any one of claims 1 to 22, wherein a concave-convex pattern (53) is provided on the surface of the heat-insulating cover plate (50) facing the cooker, and the orthographic projection of the coil winding (21) on the heat-insulating cover plate (50) covers the concave-convex pattern (53).
24. A cooking utensil, comprising the cooker cover assembly according to any one of claims 1 to 23.