Cooking utensil

Abstract

The utility model provides a cooking utensil. The cooking utensil comprises a utensil body and a cooking utensil cover, the inner pot is arranged on the appliance body and is provided with a heating surface; the heating plate is arranged on the utensil body, located on the outer side of the inner pot and used for heating the heated surface, the heating plate comprises a graphene heating film, the orthographic projection of the graphene heating film on the heated surface is located in the outer edge of the heated surface, and it is ensured that the heating area of the heating plate makes full contact with the heated surface. The problem that the local film temperature of the graphene heating film is too high due to local air heating of the graphene heating film can be effectively avoided, the heat transfer efficiency of the graphene heating film is improved, the heating power of the heating plate is ensured, the service life of the graphene heating film is prolonged, and the cooking effect of the cooking utensil is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of life electric appliances, and particularly relates to a cooking utensil. BACKGROUND

[0002] At present, the graphene heating film is used as a heat source to heat the inner pot in the related art, which has the advantages of planar heating, rapid heating and uniform heating compared with the heating by using an electric heating tube. However, in the cooking process of the electric rice cooker, the graphene heating film may not heat uniformly, especially when the graphene heating film is arranged on a substrate with poor heat conduction performance, such as microcrystalline glass. When the graphene heating film and the inner pot are not in good contact, the heat generated by the graphene heating film cannot be quickly transferred to the inner pot and the food, and the heat will be accumulated on the microcrystalline glass, resulting in abnormal temperature of the graphene heating film and affecting the performance and service life of the graphene heating film. SUMMARY

[0003] Embodiments of the utility model aim to solve at least one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of embodiments of the utility model provides a cooking utensil.

[0005] Therefore, according to a first aspect of embodiments of the utility model, a cooking utensil is provided, which comprises: a utensil body; an inner pot arranged on the utensil body, the inner pot being provided with a heated surface; and a heating plate arranged on the utensil body and located outside the inner pot, used for heating the heated surface, the heating plate comprising a graphene heating film, and a normal projection of the graphene heating film on the heated surface being located within an outer edge of the heated surface.

[0006] The cooking utensil provided by the embodiments of the utility model comprises a utensil body, an inner pot and a heating plate. Specifically, the inner pot is arranged on the utensil body. Optionally, the cooking utensil further comprises a cover body, which is arranged on the utensil body in an openable and closable manner. Based on the cover body being arranged on the utensil body, the cover body and the inner pot form a cooking cavity. The heating plate is arranged outside the inner pot and used for heating the heated surface. That is, the heat generated by the heating plate acts on the heated surface and is transmitted to the food in the cooking cavity through the inner pot, so as to heat and cook the food in the cooking cavity.

[0007] It can be understood that the graphene heating film will generate heat in the case of being electrified, thereby heating the heated surface. Compared with the related art of using an electric heating tube as a heat source for heating, the uniformity of the heating of the inner pot is improved, thereby improving the cooking effect of the food and improving the cooking efficiency and shortening the cooking time.

[0008] The orthographic projection of the graphene heating film on the heated surface is located within the outer edge of the heated surface, that is, the projection area of the graphene heating film is less than or equal to the projection area of the heated surface on the same projection plane. It can be understood that if the projection area of the graphene heating film is greater than the projection area of the heated surface, the outer edge of the graphene heating film exceeds the outer edge of the heated surface, and during the cooking process of the cooking utensil, the heat generated by the outer edge region of the graphene heating film heats the air, that is, the heat generated by the part of the region cannot be quickly transferred to the inner pot and the food, and the heat forms heat accumulation, resulting in the film temperature of the part of the region being too high. When the local area of the graphene heating film exceeds 400 DEG C, the graphene component in the graphene heating film will oxidize with oxygen in the air, causing the resistance of the graphene heating film to increase, resulting in a decrease in the heating power of the graphene heating film, affecting the cooking performance of the cooking utensil.

[0009] Since the projection area of the graphene heating film is less than or equal to the projection area of the heated surface on the same projection plane, the heating area of the heating plate is ensured to be in full contact with the heated surface, and during the cooking process of the cooking utensil, the problem of the local film temperature of the graphene heating film being too high due to the local heating of the graphene heating film to the air can be effectively avoided, the heat transfer efficiency of the graphene heating film is improved, the heating power of the heating plate is ensured, the service life of the graphene heating film is prolonged, and the cooking effect of the cooking utensil is improved.

[0010] In addition, the cooking utensil provided by the above technical scheme of the utility model also has the following additional technical features:

[0011] In some technical schemes, optionally, the maximum distance d1 between two points in the outer edge of the graphene heating film and the maximum distance d2 between two points in the outer edge of the heated surface satisfy d2-d1>=2mm.

[0012] In this technical scheme, it can be understood that when the inner pot is placed in the utensil body, there will be problems such as misalignment or poor contact, which causes poor contact between the inner pot and the heating plate, resulting in the part of the graphene heating film heating the air, that is, the heat generated by the part of the region cannot be quickly transferred to the inner pot and the food, and the heat forms heat accumulation, resulting in the film temperature of the part of the region being too high, affecting the service life of the graphene heating film.

[0013] Since the difference between the maximum distance between two points in the outer edge of the heated surface and the maximum distance between two points in the outer edge of the graphene heating film is greater than or equal to 2mm, even if misalignment occurs when the inner pot is placed, the outer edge of the graphene heating film will not exceed the outer edge of the heated surface, effectively avoiding the local heating of the graphene heating film to the air, and further avoiding the problem of the local film temperature of the graphene heating film being too high due to the local heating of the graphene heating film to the air, improving the overall heat transfer efficiency of the graphene heating film, and prolonging the service life of the graphene heating film.

[0014] In some embodiments, the heating plate further comprises a substrate, and the graphene heating film is arranged on a side of the substrate away from the heating surface; and a maximum distance between a side of the substrate away from the graphene heating film and the heating surface is less than or equal to 2 mm.

[0015] In this embodiment, the heating plate further comprises a substrate, and specifically, the graphene heating film is arranged on a side of the substrate away from the heating surface, thereby providing structural support for the graphene heating film. Specifically, the heat generated by the graphene heating film under the condition of being powered is transmitted to the heating surface through the substrate.

[0016] The maximum distance between the side of the substrate away from the graphene heating film and the heating surface is less than or equal to 2 mm, that is, the maximum distance between the side of the substrate facing the heating surface and the heating surface is less than or equal to 2 mm. It can be understood that due to the influence of the material or flatness of the inner pot, there is generally an air layer between the heating surface and the substrate, that is, there is a suspended non-contact part between the heating surface and the substrate, and the heat transfer efficiency at the contact position between the substrate and the heating surface is different from the heat transfer efficiency at the suspended non-contact position between the heating surface and the substrate, which also causes the local temperature of the graphene heating film to be too high, affecting the service life of the graphene heating film.

[0017] Since the maximum distance between the side of the substrate facing the heating surface and the heating surface is less than or equal to 2 mm, that is, the curvature or flatness of the heating surface of the inner pot is controlled, the thickness of the air layer between the heating surface and the substrate is reduced, the overall heat transfer efficiency of the graphene heating film is improved, the local temperature of the graphene heating film is prevented from being too high, and the heat transfer distance between the heating plate and the heating surface is less than 5 mm, which is beneficial to realize the ultra-thin heating of the cooking appliance, and is beneficial to realize the miniaturization of the cooking appliance.

[0018] In some embodiments, the substrate comprises a glass plate.

[0019] In this embodiment, since the substrate is a glass plate, that is, the substrate is an insulating and temperature-resistant plate, the production cost of the cooking appliance can be reduced while effectively transmitting heat.

[0020] Optionally, the glass plate is a microcrystalline glass plate.

[0021] In some embodiments, the appliance body is provided with a containing cavity, the inner pot is arranged in the containing cavity, the cooking appliance further comprises a positioning member, the positioning member is arranged on the appliance body and at least partially located in the containing cavity, and the positioning member is in contact with the outer wall of the inner pot.

[0022] In the technical solution, the cooking utensil further comprises a positioning member, and specifically, it can be understood that, in order to facilitate the taking and placing of the inner pot, a gap of 2mm is generally reserved between the inner pot and the outer pot (the cavity wall of the accommodating cavity) on one side when the inner pot is placed in the accommodating cavity, and therefore, eccentricity generally occurs during the placing of the inner pot, so that the graphene heating film locally forms heat accumulation due to the heating of air, resulting in abnormal film temperature of the graphene heating film.

[0023] At least part of the positioning member is located in the accommodating cavity, and the positioning member is in contact with the outer wall of the inner pot, so as to position the inner pot and limit the displacement of the inner pot in the accommodating cavity, so as to ensure that the outer edge of the normal projection of the graphene heating film on the heated surface is located within the outer edge of the heated surface as much as possible during the cooking process, so as to avoid the local heating of air by the graphene heating film and improve the heat transfer efficiency. At the same time, it can also prevent inaccurate side temperature measurement due to the eccentricity of the inner pot, which is beneficial to improving the accuracy of temperature measurement.

[0024] Optionally, the inner pot is arranged in the accommodating cavity in a removable manner.

[0025] In some technical solutions, the cooking utensil further comprises a first temperature measuring member, the first temperature measuring member is arranged on the utensil body, the first temperature measuring member comprises a temperature measuring portion, at least part of the temperature measuring portion is located in the accommodating cavity; and the positioning member and the temperature measuring portion are located on opposite sides of the accommodating cavity.

[0026] In the technical solution, the cooking utensil further comprises a first temperature measuring member, and specifically, the first temperature measuring member comprises a temperature measuring portion, and at least part of the temperature measuring portion extends into the accommodating cavity to detect the temperature of the inner pot. Due to the existence of the temperature measuring portion and the gap of 2mm generally reserved between the inner pot and the outer pot (the cavity wall of the accommodating cavity) on one side, eccentricity generally occurs during the placing of the inner pot.

[0027] Since the positioning member and the temperature measuring portion are located on opposite sides of the accommodating cavity, i.e. the positioning member is located on the opposite side of the temperature measuring portion, the centered positioning of the inner pot after being placed is ensured, and the displacement of the inner pot in the accommodating cavity is limited, so that the outer edge of the normal projection of the graphene heating film on the heated surface is located within the outer edge of the heated surface as much as possible during the cooking process, so as to avoid the local heating of air by the graphene heating film and improve the heat transfer efficiency. At the same time, it can also prevent inaccurate side temperature measurement due to the eccentricity of the inner pot, which is beneficial to improving the accuracy of temperature measurement.

[0028] In some technical solutions, the positioning member comprises a positioning rib, the positioning rib is arranged in the accommodating cavity and extends out on the cavity wall of the accommodating cavity.

[0029] In the technical solution, one of the embodiments of the positioning member is limited. Specifically, the positioning ribs are arranged on the cavity wall of the accommodating cavity and protrude outward. That is, when the inner pot is placed in the accommodating cavity, the positioning ribs are in contact with the outer wall of the inner pot, thereby positioning the inner pot and limiting the displacement of the inner pot in the accommodating cavity. During the cooking process, the outer edge of the projected image of the graphene heating film on the heated surface is ensured to be within the outer edge of the heated surface as much as possible, thereby avoiding local heating of the graphene heating film and improving the heat transfer efficiency.

[0030] In some technical solutions, optionally, the protruding height of the positioning rib is less than or equal to 2 mm.

[0031] In the technical solution, the protruding height of the positioning rib is limited to be less than or equal to 2 mm, thereby being able to limit the displacement of the inner pot in the accommodating cavity, ensure that the outer edge of the projected image of the graphene heating film on the heated surface is within the outer edge of the heated surface, avoid local heating of the graphene heating film, and prevent the positioning rib from being too high to cause difficulty in taking and placing the inner pot, thereby improving the user experience.

[0032] In some technical solutions, optionally, the appliance body includes a pot body and an outer pot, wherein the heating plate is arranged on the pot body, the outer pot is arranged in the pot body, and the outer pot is provided with an accommodating cavity and an open end; wherein the positioning member includes a heat insulation part and a positioning part connected together, the positioning part is located in the accommodating cavity and in contact with the outer wall of the inner pot, and the heat insulation part is located between the open end and the pot body.

[0033] In the technical solution, the appliance body includes a pot body and an outer pot. Specifically, the heating plate is arranged on the pot body, and the outer pot is provided with an accommodating cavity and an open end. The positioning member includes a heat insulation part and a positioning part connected together, the positioning part is located in the accommodating cavity and in contact with the outer wall of the inner pot, thereby positioning the inner pot and limiting the displacement of the inner pot in the accommodating cavity. During the cooking process, the outer edge of the projected image of the graphene heating film on the heated surface is ensured to be within the outer edge of the heated surface as much as possible, thereby avoiding local heating of the graphene heating film and improving the heat transfer efficiency. At the same time, it can also prevent inaccurate side temperature measurement due to the eccentricity of the inner pot, thereby improving the accuracy of temperature measurement. The heat insulation part is arranged between the open end of the outer pot and the pot body, thereby playing a heat insulation role.

[0034] In some technical solutions, optionally, the positioning member includes a silica gel member; and / or the positioning member includes an annular positioning member, or the number of the positioning members is multiple, and the multiple positioning members are arranged in a circumferential direction of the inner pot.

[0035] In the technical scheme, the positioning member comprises a silica gel member, so that the inner pot can be positioned, the displacement of the inner pot in the accommodating cavity is limited, the outer edge of the graphene heating film in the normal projection on the heated surface is ensured to be located within the outer edge of the heated surface, and the graphene heating film can avoid local heating of air, and meanwhile, the opening end of the outer pot and the pot body can be insulated.

[0036] The positioning member is a ring-shaped positioning member, or the number of the positioning members is multiple, and the multiple positioning members are arranged at intervals along the circumference of the inner pot, so that the heat insulation effect is improved.

[0037] In some technical schemes, optionally, the pot body is provided with a mounting seat, the heating plate is arranged on the mounting seat and forms a heat insulation cavity together with the mounting seat, and the cooking appliance further comprises a heat insulation member and a sealing member, wherein the heat insulation member is arranged in the heat insulation cavity, and the sealing member is arranged at the outer periphery of the heating plate and located at the gap between the heating plate and the outer pot.

[0038] In the technical scheme, the cooking appliance further comprises a heat insulation member and a sealing member, specifically, the heating plate is arranged on the mounting seat, and the heating plate and the mounting seat form a heat insulation cavity, and the heat insulation member is located in the heat insulation cavity, so as to play a heat insulation role and reduce the heat radiation of the graphene heating film to the mounting seat.

[0039] The sealing member is arranged at the outer periphery of the heating plate and located at the gap between the heating plate and the outer pot, so as to seal the gap between the heating plate and the outer pot.

[0040] The additional aspects and advantages of the present application will be described in the following description part, some of which will become apparent from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0041] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

[0042] Figure 1 Fig. 1 shows a partial structure schematic view of a cooking appliance according to one embodiment of the present application;

[0043] Figure 2 Fig. 2 shows a structure schematic view of a cooking appliance according to one embodiment of the present application;

[0044] Figure 3 Fig. 3 shows a partial structure schematic view of a cooking appliance according to another embodiment of the present application;

[0045] Figure 4 Fig. 4 shows a partial structure schematic view of a cooking appliance according to another embodiment of the present application;

[0046] Figure 5 Fig. 1 shows a structural schematic diagram of a heating plate according to an embodiment of the present application;

[0047] Figure 6 Fig. 2 shows a structural schematic diagram of a cooking utensil according to an embodiment of the present application;

[0048] Figure 7 Fig. 3 shows a structural schematic diagram of a cooking utensil according to an embodiment of the present application;

[0049] Figure 8 Fig. 4 shows a structural schematic diagram of a cooking utensil according to an embodiment of the present application.

[0050] In the drawings, Figures 1 to 8 The correspondence between the reference signs and the component names is as follows:

[0051] 100 cooking utensil, 110 utensil body, 111 accommodating cavity, 112 open end, 113 pot body, 114 outer pot, 115 mounting seat, 120 inner pot, 121 heat receiving surface, 130 heating plate, 131 graphene heating film, 132 substrate, 133 heating section, 134 first electrode, 135 second electrode, 140 positioning member, 141 positioning rib, 143 heat insulation part, 144 positioning part, 150 first temperature measuring member, 151 temperature measuring part, 160 heat insulation cavity, 170 heat insulation member, 180 sealing member, 190 second temperature measuring member. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0054] Some embodiments of the present application will be described below with reference to Figures 1 to 8 to describe the cooking utensil 100 provided according to some embodiments of the present application.

[0055] In an embodiment according to the present application, as Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, a cooking utensil 100 is provided, the cooking utensil 100 comprises: a utensil body 110; an inner pot 120 provided on the utensil body 110, the inner pot 120 is provided with a heated surface 121; a heating plate 130 provided on the utensil body 110 and located outside the inner pot 120, used for heating the heated surface 121, the heating plate 130 comprises a graphene heating film 131, and the orthogonal projection of the graphene heating film 131 on the heated surface 121 is located within the outer edge of the heated surface 121.

[0056] The cooking utensil 100 provided by the embodiment of the utility model comprises a utensil body 110, an inner pot 120 and a heating plate 130, specifically, the inner pot 120 is arranged on the utensil body 110, and optionally, the cooking utensil 100 further comprises a cover body, the cover body is arranged on the utensil body 110 in an openable and closable mode, based on the cover body being arranged on the utensil body 110, the cover body and the inner pot 120 enclose to form a cooking cavity, and the heating plate 130 is arranged outside the inner pot 120 and used for heating the heated surface 121, that is to say, the heat generated by the heating plate 130 acts on the heated surface 121 and is transmitted to the food materials in the cooking cavity through the inner pot 120, so as to heat and cook the food materials in the cooking cavity.

[0057] It can be understood that the graphene heating film 131 generates heat in the case of being electrified, thereby heating the heated surface 121, compared with the related art which utilizes the electric heating tube as a heat source to heat, the graphene heating film 131 is advantageous to improve the uniformity of the heating of the inner pot 120, thereby improving the cooking effect of the food materials, and is also advantageous to improve the cooking efficiency and shorten the cooking time.

[0058] The orthogonal projection of the graphene heating film 131 on the heated surface 121 is located within the outer edge of the heated surface 121, that is to say, the projection area of the graphene heating film 131 is less than or equal to the projection area of the heated surface 121 on the same projection plane. It can be understood that if the projection area of the graphene heating film 131 is greater than the projection area of the heated surface 121, the outer edge of the graphene heating film 131 exceeds the outer edge of the heated surface 121, and in the cooking process of the cooking utensil 100, the heat generated by the outer edge area of the graphene heating film 131 is used to heat the air, that is to say, the heat generated by the part of the area cannot be quickly transmitted to the inner pot 120 and the food materials, the heat forms heat accumulation, causing the film temperature of the part of the area to be too high, when the local area of the graphene heating film 131 exceeds 400 DEG C, the graphene component in the graphene heating film 131 will have an oxidation reaction with the oxygen in the air, so that the resistance of the graphene heating film 131 increases, causing the heating power of the graphene heating film 131 to decrease, thereby affecting the cooking performance of the cooking utensil 100.

[0059] Since the projection area of the graphene heating film 131 is less than or equal to the projection area of the heated surface 121 on the same projection plane, the heating area of the heating plate 130 is ensured to be in full contact with the heated surface 121, and during the cooking process of the cooking utensil 100, the problem of the local film temperature of the graphene heating film 131 being too high due to the local heating of air by the graphene heating film 131 can be effectively avoided, the heat transfer efficiency of the graphene heating film 131 is improved, the heating power of the heating plate 130 is ensured, the service life of the graphene heating film 131 is prolonged, and the cooking effect of the cooking utensil 100 is improved.

[0060] Optionally, the inner pot 120 includes a ceramic pot body, a glass pot body, or a metal pot body.

[0061] Optionally, the inner pot 120 includes a pot bottom and a pot side, and the outer wall of the pot bottom is provided with the heated surface 121.

[0062] As shown in FIG. 1, Figure 1 In some embodiments, optionally, the maximum distance d1 between two points in the outer edge of the graphene heating film 131 and the maximum distance d2 between two points in the outer edge of the heated surface 121 satisfy d2-d1≥2mm.

[0063] In this embodiment, it can be understood that when the inner pot 120 is placed in the utensil body 110, there are generally problems of misalignment or poor contact, so that the inner pot 120 and the heating plate 130 are not in good contact, causing some areas of the graphene heating film 131 to heat air, i.e., the heat generated by the areas cannot be quickly transferred to the inner pot 120 and the food, the heat forms heat accumulation, causing the film temperature of the areas to be too high, affecting the service life of the graphene heating film 131.

[0064] Since the difference between the maximum distance between two points in the outer edge of the heated surface 121 and the maximum distance between two points in the outer edge of the graphene heating film 131 is greater than or equal to 2mm, even if misalignment occurs when the inner pot 120 is placed, the outer edge of the graphene heating film 131 will not exceed the outer edge of the heated surface 121, effectively avoiding the local heating of air by the graphene heating film 131, and further avoiding the problem of the local film temperature of the graphene heating film 131 being too high due to the local heating of air by the graphene heating film 131, improving the overall heat transfer efficiency of the graphene heating film 131, and prolonging the service life of the graphene heating film 131.

[0065] Optionally, the difference between d2 and d1 is any one of 2mm, 3mm, 4mm, 5mm, or 6mm.

[0066] Optionally, d2-d1≥5mm.

[0067] As shown in FIG. 1, Figure 1 , Figure 2 ,Figure 4 and Figure 5 As shown in FIG. 13, in some embodiments, the heating plate 130 further comprises a substrate 132, and the graphene heating film 131 is arranged on one side of the substrate 132 away from the heating surface 121; wherein the maximum distance between the side of the substrate 132 away from the graphene heating film 131 and the heating surface 121 is less than or equal to 2 mm.

[0068] In this embodiment, it is defined that the heating plate 130 further comprises a substrate 132, and specifically, the graphene heating film 131 is arranged on one side of the substrate 132 away from the heating surface 121, thereby providing structural support for the graphene heating film 131. Specifically, the heat generated by the graphene heating film 131 under the condition of being electrified is transmitted to the heating surface 121 through the substrate 132.

[0069] The maximum distance between the side of the substrate 132 away from the graphene heating film 131 and the heating surface 121 is less than or equal to 2 mm, that is, the maximum distance between the side of the substrate 132 facing the heating surface 121 and the heating surface 121 is less than or equal to 2 mm. It can be understood that due to the material or flatness of the inner pot 120, there is generally an air layer between the heating surface 121 and the substrate 132, that is, there is a part of the heating surface 121 and the substrate 132 that is not in contact, and the heat transfer efficiency at the contact position between the substrate 132 and the heating surface 121 and the heat transfer efficiency at the non-contact position between the heating surface 121 and the substrate 132 are different, which also causes the local temperature of the graphene heating film 131 to be too high, affecting the service life of the graphene heating film 131.

[0070] Since the maximum distance between the side of the substrate 132 facing the heating surface 121 and the heating surface 121 is less than or equal to 2 mm, that is, the curvature or flatness of the heating surface 121 of the inner pot 120 is controlled, the thickness of the air layer between the heating surface 121 and the substrate 132 is reduced, the overall heat transfer efficiency of the graphene heating film 131 is improved, the local temperature of the graphene heating film 131 is prevented from being too high, and it is conducive to realizing the resistance heater with a heat transfer distance between the heating plate 130 and the heating surface 121 less than 5 mm, that is, realizing the ultra-thin heating of the cooking utensil 100, and it is conducive to realizing the miniaturization of the cooking utensil 100.

[0071] Optionally, the maximum distance between the side of the substrate 132 away from the graphene heating film 131 and the heating surface 121 is less than or equal to 1 mm.

[0072] Optionally, the maximum distance between the side of the substrate 132 away from the graphene heating film 131 and the heating surface 121 is any one of 1 mm, 0.8 mm, 0.5 mm, 0.3 mm, 0.2 mm.

[0073] In some embodiments, the substrate 132 comprises a glass plate.

[0074] In this embodiment, since the substrate 132 is a glass plate, that is, the substrate 132 is an insulating temperature-resistant plate, the production cost of the cooking utensil 100 can be reduced while effectively transferring heat.

[0075] Optionally, the glass plate is a microcrystalline glass plate.

[0076] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , in some embodiments, the utensil body 110 is provided with a containing cavity 111, the inner pot 120 is arranged in the containing cavity 111, and the cooking utensil 100 further comprises a positioning member 140, which is arranged on the utensil body 110 and at least partially located in the containing cavity 111, and the positioning member 140 is in contact with the outer wall of the inner pot 120.

[0077] In this embodiment, it is defined that the cooking utensil 100 further comprises a positioning member 140. Specifically, it can be understood that, in order to facilitate the taking and placing of the inner pot 120, a gap of 2mm is generally reserved on one side between the inner pot 120 and the outer pot 114 (the cavity wall of the containing cavity 111) when the inner pot 120 is placed in the containing cavity 111. Therefore, during the placing of the inner pot 120, eccentricity generally occurs, so that the graphene heating film 131 locally forms heat accumulation due to the heating of air, resulting in abnormal film temperature of the graphene heating film 131 in the local part.

[0078] At least part of the positioning member 140 is located in the containing cavity 111, and the positioning member 140 is in contact with the outer wall of the inner pot 120, so as to position the inner pot 120 and limit the displacement of the inner pot 120 in the containing cavity 111. During cooking, the outer edge of the normal projection of the graphene heating film 131 on the heat receiving surface 121 is ensured to be located within the outer edge of the heat receiving surface 121 as much as possible, so as to avoid the local heating of air by the graphene heating film 131 and improve the heat transfer efficiency. At the same time, it can also prevent the inaccuracy of side temperature measurement due to the eccentricity of the inner pot 120, which is beneficial to improving the accuracy of temperature measurement.

[0079] Optionally, the inner pot 120 is arranged in the containing cavity 111 for taking and placing.

[0080] As shown in Figure 3 and Figure 6 , in some embodiments, the cooking utensil 100 further comprises a first temperature measuring member 150, which is arranged on the utensil body 110, and the first temperature measuring member 150 comprises a temperature measuring portion 151, at least part of which is located in the containing cavity 111; wherein the positioning member 140 and the temperature measuring portion 151 are located on opposite sides of the containing cavity 111, respectively.

[0081] In this embodiment, the cooking utensil 100 further comprises a first temperature measuring member 150, which specifically comprises a temperature measuring portion 151, at least a part of which extends into the accommodating cavity 111 to detect the temperature of the inner pot 120. Due to the presence of the temperature measuring portion 151 and the 2mm gap generally reserved on one side between the inner pot 120 and the outer pot 114 (the cavity wall of the accommodating cavity 111), eccentricity generally occurs during the placement of the inner pot 120.

[0082] Since the positioning member 140 and the temperature measuring portion 151 are located on opposite sides of the accommodating cavity 111, i.e., the positioning member 140 is located on the opposite side of the temperature measuring portion 151, the centered positioning of the inner pot 120 after placement is ensured, and the displacement of the inner pot 120 in the accommodating cavity 111 is limited, so as to ensure that the outer edge of the graphene heating film 131 in the orthographic projection on the heat receiving surface 121 is located within the outer edge of the heat receiving surface 121 as much as possible during the cooking process, thereby avoiding the local heating of air by the graphene heating film 131 and improving the heat transfer efficiency. At the same time, it can also prevent inaccurate temperature measurement due to the eccentricity of the inner pot 120, which is beneficial to improve the accuracy of temperature measurement.

[0083] As shown in FIGS. 1, 2 and 3, Figure 2 and Figure 4 In some embodiments, the positioning member 140 optionally comprises a positioning rib 141, which is arranged in the accommodating cavity 111 and protrudes and extends on the cavity wall of the accommodating cavity 111.

[0084] In this embodiment, one of the embodiments of the positioning member 140 is defined. Specifically, the positioning rib 141 is arranged on the cavity wall of the accommodating cavity 111 and protrudes and extends, that is, when the inner pot 120 is placed in the accommodating cavity 111, the positioning rib 141 is in contact with the outer wall of the inner pot 120, thereby positioning the inner pot 120 and limiting the displacement of the inner pot 120 in the accommodating cavity 111, so as to ensure that the outer edge of the graphene heating film 131 in the orthographic projection on the heat receiving surface 121 is located within the outer edge of the heat receiving surface 121 as much as possible during the cooking process, thereby avoiding the local heating of air by the graphene heating film 131 and improving the heat transfer efficiency.

[0085] In some embodiments, the protruding height of the positioning rib 141 is less than or equal to 2mm.

[0086] In this embodiment, the protruding height of the positioning rib 141 is less than or equal to 2mm, so as to limit the displacement of the inner pot 120 in the accommodating cavity 111, ensure that the outer edge of the graphene heating film 131 in the orthographic projection on the heat receiving surface 121 is located within the outer edge of the heat receiving surface 121, avoid the local heating of air by the graphene heating film 131, and prevent the protruding height of the positioning rib 141 from being too high to cause the difficulty in taking and placing the inner pot 120, which is beneficial to improve the user experience.

[0087] As Figure 1 , Figure 2 , Figure 4 and Figure 6 shown, in some embodiments, the utensil body 110 optionally includes a pot body 113 and an outer pot 114, wherein the heating plate 130 is arranged on the pot body 113, the outer pot 114 is arranged in the pot body 113, and the outer pot 114 is provided with a containing cavity 111 and an open end 112; wherein the positioning member 140 includes a heat insulation part 143 and a positioning part 144 connected together, the positioning part 144 is located in the containing cavity 111 and in contact with the outer wall of the inner pot 120, and the heat insulation part 143 is located between the open end 112 and the pot body 113.

[0088] In this embodiment, the utensil body 110 is defined to include the pot body 113 and the outer pot 114, specifically, the heating plate 130 is arranged on the pot body 113, and the outer pot 114 is provided with the containing cavity 111 and the open end 112. The positioning member 140 includes the heat insulation part 143 and the positioning part 144 connected together, the positioning part 144 is located in the containing cavity 111 and in contact with the outer wall of the inner pot 120, thereby positioning the inner pot 120 and limiting the displacement of the inner pot 120 in the containing cavity 111, so as to ensure that the outer edge of the normal projection of the graphene heating film 131 on the heating surface 121 is located within the outer edge of the heating surface 121 as much as possible during the cooking process, avoid local heating of air by the graphene heating film 131, improve the heat transfer efficiency, and at the same time, prevent inaccurate side temperature measurement due to eccentricity of the inner pot 120, which is conducive to improving the accuracy of temperature measurement. The heat insulation part 143 is arranged between the open end 112 of the outer pot 114 and the pot body 113, thereby playing a heat insulation role.

[0089] Optionally, the positioning part 144 and the heat insulation part 143 are an integral structure.

[0090] In some embodiments, the positioning member 140 optionally includes a silica gel member; and / or the positioning member 140 includes a ring-shaped positioning member, or the number of the positioning members 140 is multiple, and the multiple positioning members 140 are arranged in a circumferential direction of the inner pot 120.

[0091] In this embodiment, the positioning member 140 includes a silica gel member, thereby being able to position the inner pot 120, limit the displacement of the inner pot 120 in the containing cavity 111, ensure that the outer edge of the normal projection of the graphene heating film 131 on the heating surface 121 is located within the outer edge of the heating surface 121, avoid local heating of air by the graphene heating film 131, and at the same time, play a heat insulation role between the open end 112 of the outer pot 114 and the pot body 113.

[0092] The positioning member 140 is a ring-shaped positioning member, or the number of the positioning members 140 is multiple, and the multiple positioning members 140 are arranged in a circumferential direction of the inner pot 120, thereby being conducive to improving the heat insulation effect.

[0093] As Figure 1 , Figure 2 and Figure 4 shown, in some embodiments, the pot body 113 is optionally provided with a mounting seat 115, the heating plate 130 is arranged on the mounting seat 115 and forms a heat insulation cavity 160 together with the mounting seat 115, and the cooking utensil 100 further comprises a heat insulation piece 170 and a sealing piece 180, wherein the heat insulation piece 170 is arranged in the heat insulation cavity 160, and the sealing piece 180 is arranged at the outer periphery of the heating plate 130 and located at the gap between the heating plate 130 and the outer pot 114.

[0094] In this embodiment, it is defined that the cooking utensil 100 further comprises a heat insulation piece 170 and a sealing piece 180, specifically, the heating plate 130 is arranged on the mounting seat 115, and the heating plate 130 forms a heat insulation cavity 160 together with the mounting seat 115, and the heat insulation piece 170 is located in the heat insulation cavity 160, thereby playing a heat insulation role and reducing the heat radiation of the graphene heating film 131 to the mounting seat 115.

[0095] The sealing piece 180 is arranged at the outer periphery of the heating plate 130 and located at the gap between the heating plate 130 and the outer pot 114, for sealing the gap between the heating plate 130 and the outer pot 114.

[0096] Optionally, the heat insulation piece 170 comprises a mica sheet and aerogel, wherein the aerogel is located on the side of the mica sheet away from the heating plate 130.

[0097] Optionally, the mounting seat 115 is provided with a mounting groove, and the heating plate 130 is arranged in the mounting groove.

[0098] In some embodiments, the heated surface 121 is optionally configured as a plane; or the heated surface 121 is configured as an arc surface, and the arc surface is concave to the side away from the heating plate 130.

[0099] In this embodiment, the heated surface 121 is a plane, and the inner pot 120 optionally comprises a ceramic pot body or a glass pot body, so that the heated surface 121 is a plane. Since the orthographic projection of the graphene heating film 131 on the heated surface 121 is located within the outer edge of the heated surface 121, and the heated surface 121 is a plane, it can be ensured that the heated surface 121 is in full contact with the heating plate 130, eliminating the air layer between the heated surface 121 and the heating plate 130, significantly improving the heat transfer efficiency, and being conducive to improving the cooking effect and the cooking efficiency. At the same time, the problem of local film temperature being too high of the graphene heating film 131 due to local heating of air by the graphene heating film 131 is avoided, and the service life of the graphene heating film 131 is prolonged.

[0100] The heat receiving surface 121 is an arc surface, and the arc surface is recessed towards the side away from the heat generating plate 130, that is, the center of the arc surface is located on the outside of the inner pot 120, that is, the bottom of the inner pot 120 is concave. Optionally, the inner pot 120 includes a metal pot body. Since the metal pot body will deform when heated, concaving the bottom of the inner pot 120 can control the deformation direction of the inner pot 120, avoid the problem that the inner pot 120 is convex after deformation and causes unstable placement and rotation of the inner pot 120, and is beneficial to improve the user experience.

[0101] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 In some embodiments, the cooking utensil 100 further includes a second temperature measuring member 190, which is arranged on the utensil body 110 and located on the side of the graphene heating film 131 away from the containing cavity 111, for detecting the temperature of the graphene heating film 131; and / or the graphene heating film 131 includes a plurality of heating segments 133, the plurality of heating segments 133 are arranged at intervals, and the heat generating plate 130 further includes a first electrode 134 and a second electrode 135, and the two ends of each heating segment 133 are respectively connected to the first electrode 134 and the second electrode 135.

[0102] In this embodiment, it is defined that the cooking utensil 100 further includes a second temperature measuring member 190, specifically, the second temperature measuring member 190 is arranged on the utensil body 110, and optionally, the utensil body 110 is further provided with a mounting portion, and the second temperature measuring member 190 is arranged on the mounting portion. Specifically, the second temperature measuring member 190 is used for detecting the temperature of the graphene heating film 131.

[0103] The graphene heating film 131 includes a plurality of heating segments 133, and the plurality of heating segments 133 are arranged at intervals, thereby providing a safety distance, that is, the graphene heating film 131 is designed as a multi-segment heating circuit, and the planar heating of the heat generating plate 130 is realized, which is beneficial to improve the uniformity of the heating of the heat receiving surface 121.

[0104] The two ends of each heating segment 133 are respectively connected to the first electrode 134 and the second electrode 135. It can be understood that the first electrode 134 and the second electrode 135 are respectively connected to a power supply, so that the plurality of heating segments 133 can generate heat under the condition that the first electrode 134 and the second electrode 135 are electrified, thereby realizing the heating function of the graphene heating film 131.

[0105] Optionally, the first electrode 134 includes silver paste and a metal conductive terminal. The second electrode 135 includes silver paste and a metal conductive terminal.

[0106] Optionally, the cover body is provided with a steam port.

[0107] Optionally, the cooking utensil 100 further comprises a third temperature measuring member arranged on the cover body and configured to detect the steam temperature.

[0108] Optionally, the utensil body 110 is further provided with an operation interface.

[0109] In the description of the present specification, the terms "connection", "mounting", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0110] In the description of the present specification, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does 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.

[0111] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cooking utensil, characterized in that, include: The body of the appliance; An inner pot is provided on the main body of the appliance, and the inner pot is provided with a heating surface; A heating plate is disposed on the main body of the appliance and located on the outside of the inner pot for heating the heated surface. The heating plate includes a graphene heating film, and the orthographic projection of the graphene heating film on the heated surface is located inside the outer edge of the heated surface.

2. The cooking utensil according to claim 1, characterized in that, The maximum distance d1 between two points on the outer edge of the graphene heating film and the maximum distance d2 between two points on the outer edge of the heated surface satisfy the condition that d2-d1≥2mm.

3. The cooking utensil according to claim 1, characterized in that, The heating plate also includes: A substrate, wherein the graphene heating film is disposed on the side of the substrate opposite to the heated surface; The maximum distance between the side of the substrate facing away from the graphene heating film and the heated surface is less than or equal to 2 mm.

4. The cooking utensil according to claim 3, characterized in that, The substrate includes a glass plate.

5. The cooking utensil according to any one of claims 1 to 4, characterized in that, The utensil body has a receiving cavity, the inner pot is disposed within the receiving cavity, and the cooking utensil further includes: A positioning element is disposed on the appliance body and at least a portion of it is located within the receiving cavity, and the positioning element is in contact with the outer wall of the inner pot.

6. The cooking utensil according to claim 5, characterized in that, Also includes: A first temperature measuring element is disposed on the appliance body. The first temperature measuring element includes a temperature measuring part, and at least a portion of the temperature measuring part is located inside the receiving cavity. The positioning element and the temperature measuring part are located on opposite sides of the receiving cavity.

7. The cooking utensil according to claim 5, characterized in that, The positioning element includes: Positioning ribs are provided inside the receiving cavity and extend protruding from the cavity wall.

8. The cooking utensil according to claim 7, characterized in that, The protrusion height of the positioning rib is less than or equal to 2mm.

9. The cooking utensil according to claim 5, characterized in that, The appliance body includes: The pot body, wherein the heating plate is disposed on the pot body; An outer pot is disposed within the pot body, and the outer pot is provided with the receiving cavity and an open end; The positioning component includes a heat insulation part and a positioning part connected together. The positioning part is located inside the receiving cavity and contacts the outer wall of the inner pot. The heat insulation part is located between the opening end and the pot body.

10. The cooking utensil according to claim 9, characterized in that, The pot body is provided with a mounting base, the heating plate is disposed on the mounting base and forms a heat insulation cavity with the mounting base, and the cooking appliance also includes: A heat insulation component is disposed within the heat insulation cavity; A sealing element is provided on the outer periphery of the heating plate and located in the gap between the heating plate and the outer pot.

11. The cooking utensil according to claim 5, characterized in that, The positioning element includes a silicone component; and / or The positioning element includes an annular positioning element, or there may be multiple positioning elements, which are arranged at intervals along the circumference of the inner pot.

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