Cookware assembly and cooking utensil

Abstract

The utility model provides a pot assembly and a cooking utensil, the pot assembly comprises a pot body, the outer wall of the pot body is provided with a heating surface; the heating piece is arranged on the outer side of the pot body and used for heating the heated surface, the heating piece comprises a graphene heating layer, the graphene heating layer comprises a plurality of heating sections, the plurality of heating sections at least comprise a first heating section and a second heating section, and the distance between the first heating section and the heated surface is larger than the distance between the second heating section and the heated surface; the resistance value of the first heating section is larger than that of the second heating section, namely, the initial power density of the first heating section far away from the heating surface is smaller than the power density of the second heating section close to the heating surface. Therefore, the problem of heat accumulation caused by high heat productivity and low heat transfer efficiency at the position far away from the heating surface is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to life electric appliance technical field, specifically, a pot assembly and cooking utensil. BACKGROUND

[0002] At present, in the related art, a graphene heating film is printed on a glass plate to prepare a heating body, and the heating body is used on an electric rice cooker product and is matched with a metal pot, when the metal pot is used, the metal pot is deformed due to heating, in order to control the deformation direction of the metal pot, the metal pot is concave inward instead of convex outward (the convex outward causes the pot body to be unstable and to rotate), and generally, the metal pot is designed and produced in advance to be concave inward by a certain arc.

[0003] However, due to the existence of the arc of the metal pot, the heat transfer efficiency between the graphene heating body and the pot is not the same, the heat transfer is good at the position where the graphene heating body contacts the pot, and the heat transfer is poor at the position where the graphene heating body is suspended and does not contact the pot. In this case, the film temperature of the graphene heating film with the same power density is not the same, specifically, the film temperature of the graphene heating film is higher at the position where the pot is suspended and does not contact, and there is a risk of exceeding the use temperature (450 DEG C) of the graphene heating film, which reduces the service life of the graphene heating film and the effective utilization rate of energy. SUMMARY

[0004] Embodiments of the utility model aim to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of embodiments of the utility model provides a pot assembly.

[0006] A second aspect of embodiments of the utility model provides a cooking utensil.

[0007] Therefore, according to the first aspect of embodiments of the utility model, a pot assembly is provided, the pot assembly comprises: a pot body, an outer wall of the pot body is provided with a heated surface; a heating element is arranged on the outer side of the pot body and is used for heating the heated surface, the heating element comprises a graphene heating layer, the graphene heating layer comprises a plurality of heating sections, the plurality of heating sections at least comprises a first heating section and a second heating section, the distance between the first heating section and the heated surface is greater than the distance between the second heating section and the heated surface; wherein the resistance value of the first heating section is greater than the resistance value of the second heating section.

[0008] The pot assembly provided by the embodiment of the utility model includes a pot body and a heating element, and specifically, the outer wall of the pot body is provided with a heated surface, and the heating element is arranged outside the pot body, and the heating element includes a graphene heating layer, and it can be understood that the graphene heating layer will generate heat under the condition of being electrified, and the heat can be transmitted to the heated surface to heat the heated surface. Optionally, the pot body is provided with a cooking cavity, and after the heat generated by the graphene heating layer is transmitted to the heated surface, it is transmitted to the food materials in the cooking cavity through the pot body to heat and cook the food materials in the cooking cavity.

[0009] It can be understood that the resistance characteristic of the graphene heating paste presents a negative temperature coefficient, that is, the resistance decreases as the temperature rises, and the heating power and the power density both increase. In the related art, the metal pot is generally recessed by a certain arc at the bottom to control the deformation direction of the metal pot. When the recessed metal pot is placed on the graphene heating body, the distances between different positions of the heated surface of the metal pot and the graphene heating body are different, so that the heat exchange efficiencies of different positions are different. Specifically, the heat transfer efficiency is slower at the position where the distance between the heated surface and the graphene heating body is larger, and the heat transfer efficiency is faster at the position where the distance between the heated surface and the graphene heating body is smaller, or the position where the heated surface is in contact with the graphene heating body.

[0010] If the power densities of all positions of the graphene heating body are consistent, the heat generated by the graphene heating body in a unit of time is the same, and the heat generated at the position far away from the heated surface is slow, so that the heat is gathered on the glass plate of the graphene heating body, and the temperature rises rapidly. At the same time, the rapid temperature rise will cause the resistance of the graphene heating film to decrease rapidly, and the rapid decrease of the resistance further causes the power density to increase, so that under the condition of such a cycle, the temperature of the graphene heating film far away from the heated surface exceeds the use temperature, and the graphene heating film is damaged.

[0011] The graphene heating layer includes a plurality of heating sections, and the plurality of heating sections at least include a first heating section and a second heating section. The distance between the first heating section and the heated surface is greater than the distance between the second heating section and the heated surface, that is, the distance between the first heating section and the heated surface is far, and the distance between the second heating section and the heated surface is close. Optionally, in the case where the heating element is located outside the bottom of the pot body, the distance between the first heating section and the heated surface is the distance in the height direction of the pot body, and in the case where the heating element is located outside the side of the pot body, the distance between the first heating section and the heated surface is the distance in the horizontal direction.

[0012] The resistance value of the first heating section is greater than the resistance value of the second heating section, that is, the resistance value per unit area of the first heating section is greater than the resistance value per unit area of the second heating section. It can be understood that the power density p = power W / area A, the power W = U 2R, where R is the resistance and U is the voltage.

[0013] That is, when the graphene heating layer is powered to heat, the initial power density of the first heating section far away from the heating surface is less than the power density of the second heating section close to the heating surface, so that the heat generation of the first heating section far away from the heating surface is small, the problem of heat accumulation due to large heat generation and slow heat transfer efficiency at a position far away from the heating surface is significantly improved, the temperature rising rate of the position where the first heating section is located is reduced, and then the temperature of the position where the first heating section is located can be ensured not to exceed the use temperature, thereby effectively protecting the first heating section and prolonging the service life of the graphene heating layer.

[0014] Meanwhile, due to the reduced temperature rising rate of the position where the first heating section is located, the temperature rising speed of the temperature detection member when detecting the temperature of the graphene heating layer is relatively slow, which is beneficial to improve the accuracy of temperature measurement.

[0015] In addition, since the initial power density of the second heating section is large, that is, the heat generation of the second heating section is large when the graphene heating layer is powered to heat, and the distance between the second heating section and the heating surface is close, the heat transfer efficiency is fast, which can effectively improve the effective utilization rate of energy and ensure the cooking effect of the food in the cooking cavity.

[0016] In addition, the pot assembly provided by the above technical scheme of the utility model has the following additional technical features:

[0017] In some technical solutions, optionally, the length of the first heating section is greater than the length of the second heating section; and / or the thickness of the first heating section is less than the thickness of the second heating section.

[0018] In this technical solution, the length of the first heating section is greater than the length of the second heating section. Alternatively, the thickness of the first heating section is less than the thickness of the second heating section. Alternatively, the length of the first heating section is greater than the length of the second heating section, and the thickness of the first heating section is less than the thickness of the second heating section, so that the resistance value per unit area of the first heating section is greater than the resistance value per unit area of the second heating section.

[0019] In some technical solutions, optionally, the heating surface is configured as an arc surface, and the arc surface is recessed towards the side away from the heating member.

[0020] In this technical solution, the heating surface is limited to an arc surface, and the arc surface is recessed towards the side away from the heating member, that is, the center of the arc surface is located on the outside of the pot body, that is, the bottom of the pot body is recessed. Since the metal pot will deform when heated, recessing the bottom of the pot body can control the deformation direction of the pot body, avoid the pot body from deforming outwardly and causing problems such as unstable placement and rotation, and improve the user's experience.

[0021] In some embodiments, the heat receiving surface is configured as an arc surface, and the arc surface extends convexly towards the side where the heat generating member is located.

[0022] In this embodiment, the heat receiving surface is configured as an arc surface, and the arc surface extends convexly towards the side where the heat generating member is located, that is, the center of the arc surface is located inside the pot body, i.e., the bottom of the pot body is convex. It can be understood that if the bottom of the pot body is convex, a positioning structure can be provided on the outside of the pot body to avoid instability, rotation and other problems when the pot body is placed on the heat generating member.

[0023] In some embodiments, the heat generating member further comprises a substrate, and the graphene heating layer is arranged on the side of the substrate away from the heat receiving surface; and the part of the substrate opposite to the second heating section is in contact with the heat receiving surface.

[0024] In this embodiment, the heat generating member further comprises a substrate, and specifically, the graphene heating layer is arranged on the side of the substrate away from the heat receiving surface, thereby providing structural support for the graphene heating layer.

[0025] The part of the substrate opposite to the second heating section is in contact with the heat receiving surface. It can be understood that the heat transfer efficiency is higher when in contact than when not in contact.

[0026] Since the starting power density of the second heating section is large, by making the part of the substrate opposite to the second heating section in contact with the heat receiving surface, the heat exchange efficiency between the second heating section and the pot body is further improved, the effective utilization rate of energy is improved, and the cooking effect of the food in the cooking cavity is ensured.

[0027] In some embodiments, the maximum distance d between the heat receiving surface and the side of the substrate away from the graphene heating layer in the height direction of the pot body is less than or equal to 0.5 mm; and / or the substrate comprises a glass plate.

[0028] In this embodiment, the maximum distance between the heat receiving surface and the side of the substrate away from the graphene heating layer in the height direction of the pot body is less than or equal to 0.5 mm. It can be understood that if the maximum distance between the heat receiving surface and the side of the substrate away from the graphene heating layer is too large, i.e., greater than 0.5 mm, the heat transfer efficiency at the position far away from the substrate will be further reduced, the heat generated by the graphene heating layer will be concentrated on the substrate, the temperature of the graphene heating layer will rapidly rise, the resistance will rapidly decrease, the power density will further increase, and the temperature at the position far away from the substrate will exceed the use temperature, causing damage to the graphene heating layer.

[0029] By setting the maximum distance between the heat receiving surface and the side of the substrate away from the graphene heating layer to be less than or equal to 0.5 mm, the heat transfer efficiency is ensured, the temperature difference between the first heating section and the second heating section is shortened, and the service life of the graphene heating layer is prolonged.

[0030] The substrate comprises a glass plate, so that the production cost of the pot assembly can be reduced while effectively transferring heat.

[0031] In some embodiments, the side of the substrate away from the heat receiving surface is provided with a clearance area, and the pot assembly further comprises a temperature detection member arranged in the clearance area.

[0032] In this embodiment, the pot assembly further comprises a temperature detection member, specifically, the side of the substrate away from the heat receiving surface is provided with a clearance area, and the temperature detection member is arranged in the clearance area. It can be understood that the clearance area is not provided with a heating section, so that the temperature detection member is not in direct contact with the heating section, thereby avoiding inaccurate temperature measurement, and the accuracy of temperature measurement is improved.

[0033] Furthermore, compared with arranging the temperature detection member on the heating section, the temperature detection member arranged in the clearance area can select a common temperature controller for temperature detection, thereby reducing the production cost of the pot assembly.

[0034] Optionally, the temperature detection member comprises a temperature controller.

[0035] In some embodiments, the first heating section is closer to the center of the pot body than the second heating section, the number of the first heating sections is at least two, and the at least two first heating sections are respectively arranged on opposite sides of the clearance area.

[0036] In this embodiment, the first heating section is closer to the center of the pot body than the second heating section, that is, the first heating section is an inner ring heating section, and the second heating section is an outer ring heating section.

[0037] The at least two first heating sections are respectively arranged on opposite sides of the clearance area, that is, the clearance area is arranged close to the center of the pot body, thereby improving the accuracy of temperature measurement.

[0038] At the same time, since the first heating section is an inner ring heating section, and the distance between the first heating section and the heat receiving surface is far, that is, the bottom of the pot body is concave, the deformation direction can be controlled, and problems such as unstable placement and rotation of the pot body caused by convex deformation of the pot body are avoided, thereby improving the user experience.

[0039] In some embodiments, the pot body comprises a metal member; and / or the plurality of heating sections are arranged at intervals.

[0040] In the technical solution, the plurality of heating sections are arranged at intervals, thereby providing a safety distance.

[0041] The pot body comprises a metal part, that is, the pot body is a metal pot. It can be understood that the metal material has good heat conduction performance, which is beneficial to improve the heat exchange efficiency, thereby improving the cooking effect of the food in the cooking cavity while reducing heat accumulation, and further prolonging the service life of the graphene heating layer.

[0042] In some technical solutions, the heating element further comprises a first electrode and a second electrode, the first electrode and the second electrode are electrically connected with the graphene heating layer, at least one of the first electrode and the second electrode comprises a conductive layer and an electrical connecting part, wherein the conductive layer is connected with the graphene heating layer, and the electrical connecting part is welded with the conductive layer; wherein the resistance at the welding position between the electrical connecting part and the conductive layer is less than or equal to 0.6Ω.

[0043] In the technical solution, the first electrode and the second electrode are electrically connected with the graphene heating layer. It can be understood that the first electrode and the second electrode are connected with the power supply, so that the graphene heating layer can generate heat under the condition that the first electrode and the second electrode are powered on, thereby realizing the heating function of the heating element.

[0044] The conductive layer is connected with the graphene heating layer, and the electrical connecting part is welded on the conductive layer. Compared with the related art, the silver electrode is connected by using a metal screw to lock the wire, and the graphene assembly is powered. The problem of affecting the appearance consistency of the heating element caused by punching holes on the substrate is avoided. At the same time, compared with the related art, the metal contact piece is crimped on the silver electrode, and the contact area between the conductive layer and the electrical connecting part can be increased, and poor contact is avoided, thereby ensuring the reliable connection between the conductive layer and the electrical connecting part.

[0045] The resistance at the welding position between the electrical connecting part and the conductive layer is less than or equal to 0.6Ω, that is, the resistance at the welding position between the electrical connecting part and the conductive layer is set to be small, so that when the power is turned on, the welding position between the electrical connecting part and the conductive layer can be avoided. A large amount of heat is generated, which causes the welding position to re-melt, thereby causing the connection between the electrical connecting part and the conductive layer to fail, and ensuring that the graphene heating layer can generate heat when powered on.

[0046] The contact area between the conductive layer and the electrical connecting part can be increased to reduce the resistance at the welding position between the electrical connecting part and the conductive layer. In addition, a solder with small resistance can also be selected.

[0047] Optionally, the resistance at the welding position between the electrical connecting part and the conductive layer is less than or equal to 0.3Ω. The resistance at the welding position between the electrical connecting part and the conductive layer can be any one of 0.3Ω, 0.2Ω and 0.1Ω.

[0048] Optionally, the conductive layer comprises a silver electrode layer.

[0049] Optionally, in use, the temperature at which the solder is required to re-melt is greater than the maximum temperature that the solder joint can reach when the graphene heating layer is in operation.

[0050] Optionally, the heating element further comprises a fixing member, the fixing member connecting the conductive layer and the electrical connecting member. It can be understood that since the silver electrode is very thin and is printed on the microcrystalline panel, the binding capacity is limited, and after the electrical connecting member is welded with the silver film (the conductive layer), the binding force in the horizontal direction of the silver film is good, but the binding force in the vertical direction is insufficient, and during assembly, the electrical connecting member is prone to falling off. By arranging the fixing member, the connection between the conductive layer and the electrical connecting member can be reinforced, the binding force between the conductive layer and the electrical connecting member in the vertical direction is improved, and then the connection reliability between the conductive layer and the electrical connecting member is improved, and falling off during assembly is avoided.

[0051] Optionally, the fixing member has a temperature resistance higher than the maximum temperature that the solder joint can reach when the graphene heating layer is in operation, so that the fixing member loses the reinforcing effect after long-term use, and falling off is avoided.

[0052] Optionally, the fixing member comprises high-temperature glue.

[0053] Optionally, the electrical connecting member comprises a metal terminal or a metal connecting wire.

[0054] Optionally, the welding process can be soldering, silver soldering or the like.

[0055] In some technical solutions, optionally, the pot body comprises a pot body and a pot bottom, wherein the pot bottom is connected with the pot body, and an outer wall of the pot bottom is provided with a heat receiving surface, and the heating element is arranged outside the pot bottom.

[0056] In the technical solution, the pot body comprises a pot body and a pot bottom, and specifically, the pot bottom is connected with the pot body, and optionally, the pot bottom and the pot body are an integral structure. Optionally, at least one of the pot bottom and the pot body is a metal member.

[0057] The outer wall of the pot bottom is provided with a heat receiving surface, and the heating element is arranged outside the pot bottom. When the graphene heating layer is powered on, the heat generated by the graphene heating layer is transmitted to the heat receiving surface through the substrate to heat the heat receiving surface.

[0058] Optionally, the pot body and the pot bottom enclose a cooking cavity, and the heat acts on the heat receiving surface and is transmitted to the cooking cavity through the pot bottom to heat and cook the food in the cooking cavity.

[0059] According to the second aspect of the present application, a cooking appliance is provided, which comprises the pot assembly provided in any of the above technical solutions, and thus has all the beneficial technical effects of the pot assembly, which will not be repeated here.

[0060] 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 practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0061] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0062] Figure 1 A structural schematic diagram of a pot assembly according to one embodiment of the present application is shown;

[0063] Figure 2 A structural schematic diagram of a heating element according to one embodiment of the present application is shown.

[0064] Figure 3 A structural schematic diagram of a heating element according to one embodiment of the present application is shown.

[0065] Among them, Figures 1 to 3 The correspondence between the reference signs and the component names in the accompanying drawings is as follows:

[0066] 100 pot assembly, 110 pot body, 111 heat receiving surface, 112 pot body, 113 pot bottom, 120 heating element, 121 substrate, 122 graphene heating layer, 123 heating section, 124 first heating section, 125 second heating section, 126 empty area, 127 first electrode, 128 second electrode, 130 temperature detection element, 140 conductive layer, 150 power connection element. DETAILED DESCRIPTION

[0067] 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 accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0068] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, 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.

[0069] Some embodiments of the present application will be described below with reference to Figures 1 to 3 to describe the pot assembly 100 and the cooking appliance provided according to some embodiments of the present application.

[0070] In one embodiment according to the present application, as Figure 1 , Figure 2 and Figure 3As shown, a pot assembly 100 is provided, the pot assembly 100 comprising: a pot body 110, an outer wall of the pot body 110 being provided with a heated surface 111; a heating element 120, provided outside the pot body 110, for heating the heated surface 111, the heating element 120 comprising a graphene heating layer 122, the graphene heating layer 122 comprising a plurality of heating segments 123, the plurality of heating segments 123 comprising at least a first heating segment 124 and a second heating segment 125, a distance between the first heating segment 124 and the heated surface 111 being greater than a distance between the second heating segment 125 and the heated surface 111; wherein an electrical resistance value of the first heating segment 124 is greater than an electrical resistance value of the second heating segment 125.

[0071] The pot assembly 100 provided by the embodiment of the present application comprises the pot body 110 and the heating element 120, specifically, the outer wall of the pot body 110 is provided with the heated surface 111, the heating element 120 is arranged outside the pot body 110, and the heating element 120 comprises the graphene heating layer 122. It can be understood that the graphene heating layer 122 generates heat under the condition of being electrified, and the heat can be transmitted to the heated surface 111 to heat the heated surface 111. Optionally, the pot body 110 is provided with a cooking cavity, and the heat generated by the graphene heating layer 122 is transmitted to the heated surface 111 and then transmitted to the food materials in the cooking cavity through the pot body 110 to heat and cook the food materials in the cooking cavity.

[0072] It can be understood that the resistance characteristic of the graphene heating paste presents a negative temperature coefficient, that is, the resistance decreases as the temperature rises, and the heating power and the power density both increase. In the related art, the metal pot is generally recessed by a certain arc at the bottom to control the deformation direction of the metal pot. When the recessed metal pot is placed on the graphene heating body, the distances between different positions of the heated surface of the metal pot and the graphene heating body are different, so that the heat exchange efficiencies of different positions are different. Specifically, the heat exchange efficiency of the position with a larger distance between the heated surface and the graphene heating body is slower, and the heat exchange efficiency of the position with a smaller distance between the heated surface and the graphene heating body, or the position where the heated surface is in contact with the graphene heating body, is faster.

[0073] If the power densities of all positions of the graphene heating body are consistent, the heat generated by the graphene heating body in a unit of time is the same, and the heat generated by the position far away from the heated surface is gathered on the glass plate of the graphene heating body due to the slow heat transfer, and the temperature rapidly rises. At the same time, the rapid rise in temperature causes the resistance of the part of the graphene heating film to rapidly decrease, and the rapid decrease in resistance further causes the power density to increase, so under such a cycle, the temperature of the part of the graphene heating film far away from the heated surface exceeds the use temperature, and the graphene heating film is damaged.

[0074] The graphene heating layer 122 comprises a plurality of heating sections 123, at least comprising a first heating section 124 and a second heating section 125, the distance between the first heating section 124 and the heat receiving surface 111 is greater than the distance between the second heating section 125 and the heat receiving surface 111, that is, the distance between the first heating section 124 and the heat receiving surface 111 is farther, and the distance between the second heating section 125 and the heat receiving surface 111 is closer. Optionally, when the heating element 120 is located outside the bottom of the pot body 110, the distance between the first heating section 124 and the heat receiving surface 111 is the distance in the height direction of the pot body 110, and when the heating element 120 is located outside the side of the pot body 110, the distance between the first heating section 124 and the heat receiving surface 111 is the distance in the horizontal direction.

[0075] The resistance value of the first heating section 124 is greater than the resistance value of the second heating section 125, that is, the resistance value per unit area of the first heating section 124 is greater than the resistance value per unit area of the second heating section 125. It can be understood that the power density p = power W / area A, power W = U 2 / R, wherein R is the resistance and U is the voltage.

[0076] That is, when the graphene heating layer 122 is powered and heated, the initial power density of the first heating section 124 which is farther away from the heat receiving surface 111 is less than the power density of the second heating section 125 which is closer to the heat receiving surface 111, so that the heat generation of the first heating section 124 which is farther away from the heat receiving surface 111 is smaller, significantly improving the problem of heat accumulation due to large heat generation and slow heat transfer efficiency at the position farther away from the heat receiving surface 111, reducing the temperature rising rate at the position of the first heating section 124, and further ensuring that the temperature at the position of the first heating section 124 will not exceed the use temperature, effectively protecting the first heating section 124 and facilitating the extension of the service life of the graphene heating layer 122.

[0077] At the same time, due to the reduced temperature rising rate at the position of the first heating section 124, the temperature rising speed of the temperature detection element 130 when detecting the temperature of the graphene heating layer 122 is also relatively slow, which is conducive to improving the accuracy of temperature measurement.

[0078] In addition, since the initial power density of the second heating section 125 is larger, that is, the heat generation of the second heating section 125 is larger when the graphene heating layer 122 is powered and heated, and the distance between the second heating section 125 and the heat receiving surface 111 is closer, the heat exchange efficiency is faster, which can effectively improve the effective utilization rate of energy and ensure the cooking effect of the food in the cooking cavity.

[0079] In some embodiments, optionally, the length of the first heating segment 124 is greater than the length of the second heating segment 125; and / or the thickness of the first heating segment 124 is less than the thickness of the second heating segment 125.

[0080] In this embodiment, the length of the first heating segment 124 is greater than the length of the second heating segment 125. Alternatively, the thickness of the first heating segment 124 is less than the thickness of the second heating segment 125. Or, the length of the first heating segment 124 is greater than the length of the second heating segment 125, and the thickness of the first heating segment 124 is less than the thickness of the second heating segment 125, thereby making the resistance per unit area of ​​the first heating segment 124 greater than the resistance per unit area of ​​the second heating segment 125.

[0081] like Figure 1 As shown, in some embodiments, the heated surface 111 is optionally configured as an arcuate surface, with the arcuate surface recessed on the side opposite to the heating element 120.

[0082] In this embodiment, the heated surface 111 is defined as an arc-shaped surface, and the arc-shaped surface is concave on the side away from the heating element 120. That is, the center of the arc-shaped surface is located on the outer side of the pot body 110, i.e., the bottom of the pot body 110 is concave. Since metal cookware will deform when heated, the concave bottom of the pot body 110 can control the deformation direction of the pot body 110, avoiding problems such as the pot body 110 being unstable or spinning due to outward deformation, which is beneficial to improving the user experience.

[0083] In some embodiments, the heated surface 111 is optionally configured as an arcuate surface, which extends protruding outward from the side where the heating element 120 is located.

[0084] In this embodiment, the heating surface 111 is defined as an arc-shaped surface, and the arc-shaped surface protrudes outward from the side where the heating element 120 is located. That is, the center of the arc-shaped surface is located inside the pot body 110, i.e., the bottom of the pot body 110 protrudes outward. It can be understood that if the bottom of the pot body 110 protrudes outward, a positioning structure can be provided on the outside of the pot body 110 to avoid instability or spinning when the pot body 110 is placed on the heating element 120.

[0085] like Figure 1 As shown, in some embodiments, optionally, the heating element 120 further includes a substrate 121, and a graphene heating layer 122 is disposed on the side of the substrate 121 away from the heated surface 111; wherein, the portion of the substrate 121 opposite to the second heating section 125 is in contact with the heated surface 111.

[0086] In this embodiment, the heating element 120 is further defined as including a substrate 121. Specifically, a graphene heating layer 122 is disposed on the side of the substrate 121 away from the heated surface 111, thereby providing structural support for the graphene heating layer 122.

[0087] The portion of the substrate 121 opposite the second heating section 125 is in contact with the heated surface 111. It can be understood that the heat transfer efficiency is higher when in contact than when not in contact.

[0088] Due to the high initial power density of the second heating section 125, by making the portion of the substrate 121 opposite the second heating section 125 in contact with the heated surface 111, the heat exchange efficiency between the second heating section 125 and the pot body 110 is further improved, the effective utilization rate of energy is improved, and the cooking effect of the food in the cooking cavity is ensured.

[0089] As shown in FIG. 1, in some embodiments, optionally, the maximum distance d between the heated surface 111 and the side of the substrate 121 away from the graphene heating layer 122 in the height direction of the pot body 110 is ≤0.5 mm; and / or the substrate 121 comprises a glass plate. Figure 1

[0090] In this embodiment, the maximum distance between the heated surface 111 and the side of the substrate 121 away from the graphene heating layer 122 in the height direction of the pot body 110 is less than or equal to 0.5 mm. It can be understood that if the maximum distance between the heated surface 111 and the side of the substrate 121 away from the graphene heating layer 122 is too large, i.e., greater than 0.5 mm, the heat transfer efficiency at the position where the heated surface 111 is far away from the substrate 121 will be further reduced, the heat generated by the graphene heating layer 122 will be concentrated on the substrate 121, the temperature of the graphene heating layer 122 will rapidly rise, the resistance will rapidly decrease, the power density will further increase, and the temperature at the position where the graphene heating layer 122 is far away from the heated surface 111 will exceed the use temperature, causing damage to the graphene heating layer 122.

[0091] By making the maximum distance between the heated surface 111 and the side of the substrate 121 away from the graphene heating layer 122 less than or equal to 0.5 mm, the heat transfer efficiency is ensured, the temperature difference between the first heating section 124 and the second heating section 125 is shortened, and the service life of the graphene heating layer 122 is prolonged.

[0092] The substrate 121 comprises a glass plate, so that the production cost of the pot assembly 100 can be reduced while effectively transferring heat.

[0093] As shown in FIG. 1, in some embodiments, optionally, the side of the substrate 121 away from the heated surface 111 is provided with a void area 126, and the pot assembly 100 further comprises a temperature detection member 130, which is arranged in the void area 126. Figure 2

[0094] ​​In the embodiment, the pot assembly 100 further comprises a temperature detection member 130. Specifically, the base plate 121 is provided with an empty area 126 on the side away from the heating surface 111, and the temperature detection member 130 is arranged in the empty area 126. It can be understood that the empty area 126 is not provided with the heating section 123, so that the temperature detection member 130 is prevented from directly contacting the heating section 123 to cause inaccurate temperature measurement, and the accuracy of temperature measurement is improved.

[0095] Moreover, the temperature detection member 130 is arranged in the empty area 126 to perform temperature measurement, compared with arranging the temperature detection member 130 on the heating section 123 to perform temperature measurement, a common temperature controller can be selected as the temperature detection member 130, and the production cost of the pot assembly 100 is reduced.

[0096] Optionally, the temperature detection member 130 comprises a temperature controller.

[0097] As shown in Figure 2 some embodiments, optionally, the first heating section 124 is closer to the center of the pot body 110 than the second heating section 125, the number of the first heating section 124 is at least two, and the at least two first heating sections 124 are respectively located on opposite sides of the empty area 126.

[0098] In the embodiment, the first heating section 124 is closer to the center of the pot body 110 than the second heating section 125, that is, the first heating section 124 is an inner ring heating section, and the second heating section 125 is an outer ring heating section.

[0099] The at least two first heating sections 124 are respectively located on opposite sides of the empty area 126, that is, the empty area 126 is arranged close to the center of the pot body 110, and the accuracy of temperature measurement is improved.

[0100] At the same time, since the first heating section 124 is an inner ring heating section, and the distance between the first heating section 124 and the heating surface 111 is far, that is, the bottom of the pot body 110 is concave, so that the deformation direction can be controlled, and the problem that the pot body 110 is deformed to be convex and is unstable and rotates is avoided, and the user experience is improved.

[0101] As shown in Figure 2 some embodiments, optionally, the pot body 110 comprises a metal member; and / or the plurality of heating sections 123 are arranged at intervals.

[0102] In the embodiment, the plurality of heating sections 123 are arranged at intervals to provide a safety distance.

[0103] The pot body 110 comprises a metal part, that is, the pot body 110 is a metal pot. It can be understood that the metal material has good heat conduction performance, which is beneficial to improve the heat exchange efficiency, thereby improving the cooking effect of the food in the cooking cavity while reducing heat accumulation, and is beneficial to further prolong the service life of the graphene heating layer 122.

[0104] As shown in Figure 3 In some embodiments, the heating element 120 optionally further comprises a first electrode 127 and a second electrode 128, the first electrode 127 and the second electrode 128 are respectively electrically connected with the graphene heating layer 122, at least one of the first electrode 127 and the second electrode 128 comprises a conductive layer 140 and an electrical connecting piece 150, wherein the conductive layer 140 is connected with the graphene heating layer 122, and the electrical connecting piece 150 is welded with the conductive layer 140; wherein the resistance at the welding position between the electrical connecting piece 150 and the conductive layer 140 is less than or equal to 0.6Ω.

[0105] In this embodiment, the first electrode 127 and the second electrode 128 are respectively electrically connected with the graphene heating layer 122. It can be understood that the first electrode 127 and the second electrode 128 are respectively connected with a power supply, so that the graphene heating layer 122 can generate heat under the condition that the first electrode 127 and the second electrode 128 are electrified, thereby realizing the heating function of the heating element 120.

[0106] The conductive layer 140 is connected with the graphene heating layer 122, and the electrical connecting piece 150 is welded on the conductive layer 140. Compared with the related art which uses a metal screw to threadedly lock a silver electrode to supply power to a graphene assembly, the problem of affecting the appearance consistency of the heating element 120 due to punching on the substrate is avoided. At the same time, compared with the related art which presses a metal contact on a silver electrode, the contact area between the conductive layer 140 and the electrical connecting piece 150 can be increased, and poor contact can be avoided, thereby ensuring the reliable connection between the conductive layer 140 and the electrical connecting piece 150.

[0107] The resistance at the welding position between the electrical connecting piece 150 and the conductive layer 140 is less than or equal to 0.6Ω, that is, the resistance at the welding position between the electrical connecting piece 150 and the conductive layer 140 is set to be small, so that when electrified, the problem that a large amount of heat is generated at the welding position between the electrical connecting piece 150 and the conductive layer 140, which causes the welding position to re-melt, thereby causing the connection between the electrical connecting piece 150 and the conductive layer 140 to fail, can be avoided, and it is ensured that the graphene heating layer 122 can generate heat when electrified.

[0108] The contact area between the conductive layer 140 and the electrical connecting piece 150 can be increased to reduce the resistance at the welding position between the electrical connecting piece 150 and the conductive layer 140. In addition, a solder with small resistance can also be selected.

[0109] Optionally, the resistance at the solder joint between the electrical connector 150 and the conductive layer 140 is less than or equal to 0.3Ω. The resistance at the solder joint between the electrical connector 150 and the conductive layer 140 can be any one of 0.3Ω, 0.2Ω, or 0.1Ω.

[0110] Optionally, the conductive layer 140 includes a silver electrode layer.

[0111] Optionally, during use, the temperature at which the solder remelts is required to be greater than the highest temperature that the solder joint can reach when the graphene heating layer 122 is working.

[0112] Optionally, the heating element 120 also includes a fixing member, which connects the conductive layer 140 and the contact element 150. It is understood that because the silver electrode itself is very thin and printed on the microcrystalline panel, its bonding strength is limited. After the contact element 150 is soldered to the silver film (conductive layer 140), it has good bonding force in the horizontal direction of the silver film, but insufficient bonding force in the vertical direction, making it prone to detachment during assembly. By providing the fixing member, the connection between the conductive layer 140 and the contact element 150 can be reinforced, improving the bonding force between the conductive layer 140 and the contact element 150 in the vertical direction. This, in turn, helps improve the connection reliability between the conductive layer 140 and the contact element 150, preventing detachment during assembly.

[0113] Among them, the temperature resistance of the fastener is higher than the highest temperature that the welded joint of the graphene heating layer 122 can reach when it is working, thus avoiding the fastener from falling off due to loss of reinforcement after long-term use.

[0114] Optionally, the fastener includes high-temperature adhesive.

[0115] Optionally, the connector 150 includes metal terminals or metal connecting wires.

[0116] Alternatively, the welding process can be soldering, silver soldering, or other welding methods.

[0117] like Figure 1 As shown, in some embodiments, optionally, the pot body 110 includes a pot body 112 and a pot bottom 113, wherein the pot bottom 113 is connected to the pot body 112, the outer wall of the pot bottom 113 is provided with a heating surface 111, and the heating element 120 is provided on the outer side of the pot bottom 113.

[0118] In this embodiment, the pot body 110 is defined as including a pot body 112 and a pot bottom 113. Specifically, the pot bottom 113 is connected to the pot body 112. Optionally, the pot bottom 113 and the pot body 112 are an integral structure. Optionally, at least one of the pot bottom 113 and the pot body 112 is a metal part.

[0119] The outer wall of the bottom 113 is provided with a heating surface 111, and the heating element 120 is arranged outside the bottom 113. When the graphene heating layer 122 is powered on, the heat generated by the graphene heating layer 122 is transmitted to the heating surface 111 through the substrate 121 to heat the heating surface 111.

[0120] Optionally, the pot body 112 and the bottom 113 form a cooking cavity, and the heat acts on the heating surface 111 and is transmitted to the cooking cavity through the bottom 113 to heat and cook the food in the cooking cavity.

[0121] In one specific embodiment, example 1: the graphene heating layer 122 is printed on the glass panel (substrate 121), which is divided into four heating films (heating sections 123) inside and outside, of which the outer two sections and the inner two sections. The resistance of the outer heating film (second heating section 125) is 0.8 times that of the inner heating film (first heating section 124), and the power density is 1.25 times. The center jump temperature controller (temperature detection element 130) controls 200℃. When the inner container (pot body 110) with an inner concave arc of 0.3mm is matched with the glass panel printed with the graphene heating layer 122 to boil 300ml water, the monitored actual temperature is measured, and the temperature of the inner and outer rings is basically the same, and the outer ring is 5℃ higher than the inner ring. The temperature controller jumps 5 minutes later, and the film temperature is not more than 380℃, which does not affect the service life.

[0122] Example 2: The graphene heating layer 122 is printed on the glass panel (substrate 121), which is divided into four heating films (heating sections 123) inside and outside, of which the outer two sections and the inner two sections. The resistance of the outer heating film (second heating section 125) is 0.9 times that of the inner heating film (first heating section 124), and the power density is 1.1 times. The center jump temperature controller (temperature detection element 130) controls 200℃. When the inner container (pot body 110) with an inner concave arc of 0.3mm is matched with the glass panel printed with the graphene heating layer 122 to boil 300ml water, the monitored actual temperature is measured, and the temperature of the inner and outer rings is basically the same, and the inner ring is 20℃ higher than the outer ring. The temperature controller jumps 5 minutes later, and the film temperature is not more than 410℃, which does not affect the service life.

[0123] Comparative example 1: The graphene heating layer is printed on the glass panel, which is divided into four heating films inside and outside, of which the outer two sections and the inner two sections. The resistance of the outer heating film is the same, and the center temperature controller controls 200℃. When the inner container with an inner concave arc of 0.3mm is matched with the glass panel printed with the graphene heating layer to boil 300ml water, the monitored actual temperature is measured, and the temperature of the inner ring is much higher than that of the outer ring. After a period of heating, the temperature difference between the inner and outer rings can be as high as 50℃, and the temperature controller jumps 4 hours later, and the film temperature is not more than 440℃, which is close to the critical use temperature.

[0124] Comparative Example 2: The graphene heating layer is printed on the glass panel and divided into four sections of heating film, including two sections of outer ring and two sections of inner ring. The resistances of the outer ring heating film are the same, and the center temperature controller controls 200°C. When the inner pot with an inner concave radius of 0.7 mm is matched with the glass panel printed with the graphene heating layer to heat 300 ml of water, the monitored and measured temperature is monitored, the temperature of the inner ring is significantly higher than that of the outer ring, after a period of heating, the temperature difference between the inner and outer rings can be 100°C, the center temperature controller is controlled after 2.5 minutes, and the maximum film temperature does not exceed 490°C, which exceeds the normal use temperature of graphene.

[0125] From Example 1 and Example 2, it can be seen that the resistance of the outer ring heating film (second heating section 125) is smaller than that of the inner ring heating film (first heating section 124), which can shorten the temperature difference between the inner and outer ring heating films, and the maximum film temperature does not exceed the use temperature, meeting the use requirements.

[0126] From Comparative Example 1, it can be seen that when the resistance of the outer ring heating film (second heating section 125) and the resistance of the inner ring heating film (first heating section 124) are the same, the temperature difference between the inner and outer rings is large, and the film temperature is close to the use temperature under the condition that the inner pot bottom has a relatively small radius.

[0127] From Comparative Example 2, it can be seen that when the resistance of the outer ring heating film (second heating section 125) and the resistance of the inner ring heating film (first heating section 124) are the same, and the inner pot bottom has a large radius, the temperature difference between the inner and outer rings is too large, and the film temperature exceeds the use temperature.

[0128] In another specific embodiment, Example 1: The graphene heating assembly (heating element 120) is powered by welding a metal terminal (electrically connected part 150) on the surface of the silver electrode (conductive layer 140), and the welding resistance is 0.1Ω. During use, the film temperature is controlled at 200°C, the temperature at the highest part of the terminal is 150°C, the solder is tin paste with a temperature resistance of 220°C or above, and after the terminal is welded, high-temperature flame-retardant glue (fixing part) is used to reinforce the welding part, and the temperature resistance of the high-temperature flame-retardant glue is 350°C. The entire graphene heating assembly can work for a long time after being connected to electricity, without sparking, and the terminal does not fall off.

[0129] Example 2: The graphene heating assembly (heating element 120) is powered by welding a metal terminal (electrically connected part 150) on the surface of the silver electrode (conductive layer 140), and the welding resistance is 0.2Ω. During use, the film temperature is controlled at 400°C, the temperature at the highest part of the terminal is 280°C, the solder is silver paste with a temperature resistance of 400°C or above, and after the terminal is welded, high-temperature flame-retardant glue (fixing part) is used to reinforce the welding part, and the temperature resistance of the high-temperature flame-retardant glue is 450°C. The entire graphene heating assembly can work for a long time after being connected to electricity, without sparking, and the terminal does not fall off.

[0130] Comparative Example 1: graphene heating assembly, through the silver electrode surface welding metal terminal power, welding resistance is 0.8Ω, in use, the film temperature is controlled at 200℃, but due to the welding resistance is too large, the welding place itself heating is big, the highest temperature of the terminal is 300℃, the solder is tin paste, the temperature resistance is above 220℃, after the terminal is welded, the welding place is reinforced by high temperature flame retardant glue, the temperature resistance of the high temperature flame retardant glue is 350℃. After the whole graphene heating assembly is connected and used, the solder paste will melt again, resulting in connection failure, the whole graphene heating assembly is disconnected, and cannot be powered and heated.

[0131] Comparative Example 2: graphene heating assembly, through the silver electrode surface welding metal terminal power, welding resistance is 0.1Ω, in use, the film temperature is controlled at 400℃, due to heat transfer, the highest temperature of the terminal is 300℃, the solder is tin paste, the temperature resistance is above 220℃, after the terminal is welded, the welding place is reinforced by high temperature flame retardant glue, the temperature resistance of the high temperature flame retardant glue is 350℃. After the whole graphene heating assembly is connected and used, the solder paste will melt again, resulting in connection failure, the whole graphene heating assembly is disconnected, and cannot be powered and heated.

[0132] Comparative Example 3: graphene heating assembly, through the silver electrode surface welding metal terminal power, welding resistance is 0.2Ω, in use, the film temperature is controlled at 400℃, due to heat transfer, the highest temperature of the terminal is 300℃, the solder is silver paste, the temperature resistance is above 400℃, after the terminal is welded, no additional reinforcement is carried out, in the assembly process, due to accidentally pulling in the vertical direction, the welding place is loose or directly disconnected, and the whole graphene heating assembly cannot be powered and heated.

[0133] Comparative Example 4: graphene heating assembly, through the silver electrode surface welding metal terminal power, welding resistance is 0.2Ω, in use, the film temperature is controlled at 400℃, due to heat transfer, the highest temperature of the terminal is 300℃, the solder is silver paste, the temperature resistance is above 400℃, after the terminal is welded, additional reinforcement is carried out by using ordinary glue, the temperature resistance of the glue is 250℃, in the assembly process, the welding place can be effectively prevented from falling off, but after a period of use, due to the poor temperature resistance of the glue, the reinforcement effect is lost, and the subsequent falling off occurs, resulting in that the whole graphene heating assembly cannot be powered and heated.

[0134] According to the second aspect of the utility model, a kind of cooking utensil is provided, including the pot assembly 100 provided by any of the above embodiments, thus having all beneficial technical effects of the pot assembly 100, which will not be repeated here.

[0135] In the description of the present application, the terms "connection", "installation", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; can be directly connected, or indirectly connected through 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.

[0136] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, 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.

[0137] 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 cookware assembly, characterized in that, include: The outer wall of the pot body is provided with a heating surface; A heating element is disposed on the outside of the pot body for heating the heated surface. The heating element includes a graphene heating layer, which includes multiple heating segments. The multiple heating segments include at least a first heating segment and a second heating segment. The distance between the first heating segment and the heated surface is greater than the distance between the second heating segment and the heated surface. The resistance value of the first heating segment is greater than the resistance value of the second heating segment.

2. The cookware assembly according to claim 1, characterized in that, The length of the first heating segment is greater than the length of the second heating segment; and / or the thickness of the first heating segment is less than the thickness of the second heating segment.

3. The cookware assembly according to claim 1 or 2, characterized in that, The heated surface is constructed as an arc-shaped surface, and the arc-shaped surface is recessed on the side opposite to the heating element.

4. The cookware assembly according to claim 1 or 2, characterized in that, The heated surface is constructed as an arc-shaped surface, which protrudes outward from the side where the heating element is located.

5. The cookware assembly according to claim 1 or 2, characterized in that, The heating element also includes: The substrate, wherein the graphene heating layer is disposed on the side of the substrate opposite to the heated surface; The portion of the substrate opposite to the second heating section is in contact with the heated surface.

6. The cookware assembly according to claim 5, characterized in that, Along the height direction of the pot body, the maximum distance d between the heated surface and the side of the substrate opposite to the graphene heating layer is ≤0.5mm; and / or The substrate includes a glass plate.

7. The cookware assembly according to claim 5, characterized in that, The substrate has a clearance area on the side opposite to the heated surface, and the cookware assembly further includes: A temperature detection device is installed in the protected area.

8. The cookware assembly according to claim 7, characterized in that, The first heating section is closer to the center of the pot body than the second heating section, and there are at least two first heating sections, which are located on opposite sides of the air-sheltered area.

9. The cookware assembly according to claim 1 or 2, characterized in that, The pot body includes metal parts; and / or The multiple heating segments are arranged at intervals.

10. The cookware assembly according to claim 1 or 2, characterized in that, The heating element further includes a first electrode and a second electrode, the first electrode and the second electrode being electrically connected to the graphene heating layer, and at least one of the first electrode and the second electrode comprising: A conductive layer is connected to the graphene heating layer; The electrical connector is welded to the conductive layer; The resistance at the weld between the electrical connector and the conductive layer is less than or equal to 0.6Ω.

11. The cookware assembly according to claim 1 or 2, characterized in that, The pot body includes: Pot body; The bottom of the pot is connected to the body of the pot, and the outer wall of the bottom of the pot is provided with the heating surface. The heating element is located on the outer side of the bottom of the pot.

12. A cooking utensil, characterized in that, Includes the cookware assembly as described in any one of claims 1 to 11.

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