Heating assembly and vegetable warming board

Abstract

The utility model provides a heating assembly and a vegetable warming board, the heating assembly comprises a heating layer, the heating layer comprises a first insulating layer, a heating film and a second insulating layer, the heating film is clamped between the first insulating layer and the second insulating layer, the heating film comprises a conductive film, a positive electrode electric connecting piece and a negative electrode electric connecting piece, the positive electric connecting piece and the negative electric connecting piece are arranged on the two sides of the conductive thin film at intervals, the positive electric connecting piece, the negative electric connecting piece and the conductive thin film are located on the same horizontal plane, and the positive electric connecting piece and the negative electric connecting piece are used for being connected with an external power supply to guide current to flow through the conductive thin film; the heat insulation layer is arranged on the side, away from the heating film, of the second insulation layer. According to the utility model, the conductive film, the anode electric connecting piece and the cathode electric connecting piece form the heating film, and the anode electric connecting piece and the cathode electric connecting piece can be conducted with an external power supply to guide current to flow through the sheet-shaped conductive film, so that planar heating is realized, and the heat distribution of the heating assembly is more uniform.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hot plate technology field, concretely relates to a heating assembly and hot plate. BACKGROUND

[0002] The hot plate is a kind of heating appliance, heat is generated by heating mechanism, and heat is transferred to the food placed on the hot plate, to meet the demand of food heat preservation.

[0003] The existing hot plate is usually heated by resistance wire, and the resistance wire is wire-wound, the heat generated when heating is unevenly distributed, resulting in extremely low temperature in some areas on the hot plate, and poor heat preservation effect. SUMMARY

[0004] The embodiment of the utility model provides a kind of heating assembly and hot plate, can improve the technical problem of uneven heating in relevant technology.

[0005] First, the embodiment of the utility model provides a kind of heating assembly, for hot plate, the heating assembly includes:

[0006] Heating layer, the heating layer includes first insulating layer, heating film and second insulating layer, the heating film is clamped between the first insulating layer and the second insulating layer, the heating film includes conductive film, positive electrode electric connection piece and negative electrode electric connection piece, the positive electrode electric connection piece and the negative electrode electric connection piece are spaced apart and arranged on the two sides of the conductive film, and the positive electrode electric connection piece, the negative electrode electric connection piece and the conductive film are in the same horizontal plane, the positive electrode electric connection piece and the negative electrode electric connection piece are used to connect external power supply to guide current to flow through the conductive film;And,

[0007] Thermal barrier, the thermal barrier is arranged on the side of the second insulating layer away from the heating film.

[0008] In an embodiment, the conductive film includes first side edge and second side edge oppositely arranged along the first direction, the positive electrode electric connection piece extends along the first side edge, and the negative electrode electric connection piece extends along the second side edge.

[0009] In an embodiment, the first insulating layer includes third side edge and fourth side edge oppositely arranged, the third side edge is close to the first side edge, and the fourth side edge is close to the second side edge;Wherein,

[0010] The distance between the positive electrode electric connection piece and the third side edge is 1mm to 10mm;And / or,

[0011] The distance between the negative electrode electric connection piece and the fourth side edge is 1mm to 10mm;And / or,

[0012] A ratio of a length of the positive electrode electrical connecting member to a length of the first side edge is between 0.8 and 1.2 along an extension direction of the first side edge; and / or,

[0013] A ratio of a length of the negative electrode electrical connecting member to a length of the second side edge is between 0.8 and 1.2 along an extension direction of the second side edge.

[0014] In an embodiment, the heating assembly further comprises a waterproof layer, at least part of the waterproof layer is arranged on a side of the thermal insulation layer away from the heating layer.

[0015] In an embodiment, the waterproof layer comprises:

[0016] a bearing portion arranged on a side of the thermal insulation layer away from the heating layer; and,

[0017] a turn-up portion, one end of the turn-up portion is connected to a side edge of the bearing portion, and the other end of the turn-up portion is located on a side of the heating layer away from the thermal insulation layer.

[0018] In an embodiment, waterproof glue is arranged between the turn-up portion and the heating layer; and / or,

[0019] the turn-up portion and the heating layer are connected by sewing thread.

[0020] In an embodiment, a thickness of the bearing portion is less than or equal to 3 mm.

[0021] In an embodiment, the conductive thin film comprises at least one of a metal thin film and a metal oxide thin film.

[0022] In an embodiment, a thickness of the conductive thin film is between 80 nm and 200 nm; and / or,

[0023] a thickness of the thermal insulation layer is between 4 mm and 20 mm; and / or,

[0024] a thickness of the heating assembly is between 5 mm and 30 mm.

[0025] In an embodiment, the heating assembly further comprises a heat-conducting layer, the heat-conducting layer is arranged between the heating layer and the thermal insulation layer.

[0026] In a second aspect, embodiments of the utility model provide a warming chopping board, comprising:

[0027] the heating assembly as described in the foregoing embodiments; and,

[0028] a control module, the control module is electrically connected with the heating assembly, so as to control the heating assembly.

[0029] In an embodiment, the hot plate further comprises:

[0030] a first protective layer disposed on a side of the heating assembly close to the heating layer; and / or,

[0031] a second protective layer disposed on a side of the heating assembly away from the heating layer.

[0032] In an embodiment, the hot plate further comprises a protective frame provided with a receiving groove, and at least part of the hot plate is accommodated in the receiving groove.

[0033] The embodiment of the utility model has the advantages of:

[0034] In the embodiment of the utility model, the conductive film, the positive electrode electric connecting piece and the negative electrode electric connecting piece are used to form the heating film, the positive electrode electric connecting piece and the negative electrode electric connecting piece can be conductive with the external power supply, the current is guided to flow through the sheet-shaped conductive film, and then the planar heating is realized, so that when the heating assembly generates heat, the heat distribution is more uniform, the heating effect of the hot plate made of the heating assembly on the object to be heated is improved, and the risk of insulation failure of the heating assembly caused by local overheating is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0036] Figure 1 It is the sectional view of the heating assembly provided by the embodiment of the utility model;

[0037] Figure 2 It is the sectional view of the heating layer provided by the embodiment of the utility model;

[0038] Figure 3 It is the structural schematic view of the heating film and the first insulating layer provided by the embodiment of the utility model;

[0039] Figure 4 It is the structural schematic view of the heating film provided by the embodiment of the utility model;

[0040] Figure 5 It is the sectional view of the heating assembly provided by the embodiment of the utility model;

[0041] Figure 6 It is the sectional view of the heating assembly provided by the embodiment of the utility model;

[0042] Figure 7 is a sectional view of the heating assembly provided by the embodiment of the utility model;

[0043] Figure 8 is a sectional view of the warming chopping board provided by the embodiment of the utility model;

[0044] Figure 9 is a sectional view of the warming chopping board provided by the embodiment of the utility model;

[0045] Figure 10 is a sectional view of the warming chopping board provided by the embodiment of the utility model.

[0046] The respective reference numerals in the figure are:

[0047] 1, heating assembly;

[0048] 11, heating layer;

[0049] 111, first insulating layer; 1111, third side edge; 1112, fourth side edge;

[0050] 112, heating film; 1121, conductive film; 1121a, first side edge; 1121b, second side edge; 1122, positive electrode electric connecting piece; 1123, negative electrode electric connecting piece;

[0051] 113, second insulating layer;

[0052] 12, heat insulation layer;

[0053] 13, waterproof layer; 131, bearing portion; 132, turn-up portion;

[0054] 14, heat conduction layer;

[0055] 2, warming chopping board; 21, first protective layer; 22, second protective layer; 23, protective frame; 231, accommodating groove;

[0056] H1, first direction. DETAILED DESCRIPTION

[0057] Clearly and completely describe the technical scheme in the embodiments of the utility model with the drawings in the embodiments of the utility model below, obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the utility model, and is not used to limit the utility model. In the utility model, the orientation words such as "up" and "down" are generally used to indicate the up and down of the device in the actual use or working state, and the specific is the drawing direction in the drawing; and "inner" and "outer" are used to the contour of the device.

[0058] With reference to Figures 1 to 3 The utility model provides a heating assembly 1 for warming cutting board 2, heating assembly 1 includes: heating layer 11, heating layer 11 includes first insulating layer 111, heating film 112 and second insulating layer 113, heating film 112 is clamped between first insulating layer 111 and second insulating layer 113, heating film 112 includes conductive film 1121, positive electrode connecting piece 1122 and negative electrode connecting piece 1123, positive electrode connecting piece 1122 and negative electrode connecting piece 1123 are arranged at the both sides of conductive film 1121, and positive electrode connecting piece 1122, negative electrode connecting piece 1123 and conductive film 1121 are in the same horizontal plane, and positive electrode connecting piece 1122 and negative electrode connecting piece 1123 are used to connect external power supply to guide current to flow through conductive film 1121;Thermal barrier layer 12, thermal barrier layer 12 is arranged on the side of second insulating layer 113 away from heating film 112.

[0059] In actual use, positive electrode connecting piece 1122 and negative electrode connecting piece 1123 are communicated with external power supply to guide current to flow through conductive film 1121 continuously, since conductive film 1121 has a small amount of resistance, according to Joule's law, conductive film 1121 can continuously convert electric energy into heat energy, thereby emitting high heat, and the heat can be transmitted upward through first insulating layer 111, so that the dishes placed on the side of first insulating layer 111 can maintain an appropriate temperature, and first insulating layer 111 ensures the safety of the dishes during heating, preventing dangerous situations such as electric shock. It can be understood that an additional protective layer, shell and the like structure can also be provided on the first insulating layer 111, thereby improving the uniformity of the surface temperature of the first insulating layer 111, or protecting the first insulating layer 111, at this time, the dishes can be placed on the protective layer or shell.

[0060] The first insulating layer 111 is used to isolate the heating film 112 from the external environment, prevent current leakage, and provide certain protection for the heating film 112, so as to prevent the heating film 112 from being damaged due to bearing heavy objects, accidental falling and other factors during use, and ensure the safety and stability of the heating layer 11. The shape of the first insulating layer 111 is usually similar to that of the heating film 112, and the size of the first insulating layer 111 can be greater than or equal to that of the heating film 112, so that the first insulating layer 111 can cover the surface of one side of the heating film 112, reducing the probability of the heating film 112 being affected by the external environment. The first insulating layer 111 can be made of high-temperature resistant insulating materials such as ceramic fiber materials, polytetrafluoroethylene, polyester imine, polyethylene terephthalate, etc., which have good insulation and high-temperature resistance, and are relatively soft, without affecting the user to wind and store the heating assembly 1. The first insulating layer 111 is usually in a sheet structure, and the surface opposite to the heating film 112 can be flat, so as to facilitate placing food. The second insulating layer 113 is similar to the first insulating layer 111, and will not be described here.

[0061] The heating film 112 includes a conductive film 1121 and a positive electrode connecting piece 1122 and a negative electrode connecting piece 1123 connected with the conductive film 1121. The positive electrode connecting piece 1122 and the negative electrode connecting piece 1123 are arranged on both sides of the conductive film 1121, i.e. the positive electrode connecting piece 1122, the negative electrode connecting piece 1123 and the conductive film 1121 are in the same plane, thereby reducing the overall thickness of the heating film 112, and the heat generated by the heating layer can be quickly conducted to the heated body. The conductive film 1121 as the heating part of the heating assembly 1 can be made of graphene material, indium tin oxide powder, etc., which has good conductivity. When the current passes through, due to the resistance characteristics of the conductive film 1121 itself, the electric energy is converted into heat energy, thereby generating heat to keep the food on the warming plate 2 warm. Referring to Figure 3 and Figure 4The positive electrode connecting member 1122 and the negative electrode connecting member 1123 can be provided in the form of a strip-shaped metal, and the length of the strip-shaped metal can be determined according to the size of the heating film 112. The positive electrode connecting member 1122 and the negative electrode connecting member 1123 can be provided in the form of a strip-shaped metal, and one end of the strip-shaped metal is tightly connected to the conductive film 1121, and the other end extends out of the first insulating layer 111 and the second insulating layer 113 to connect to an external power supply. For example, a copper foil can be used as the positive electrode connecting member 1122 and the negative electrode connecting member 1123. Since copper has good electrical conductivity and small resistance, the loss of electrical energy during transmission can be reduced, and sufficient current can flow smoothly into the conductive film 1121. The positive electrode connecting member 1122 serves as the inlet of the current flowing into the conductive film 1121, and guides the positive current of the external power supply to the conductive film 1121. The negative electrode connecting member 1123 serves as the outlet of the current flowing out of the conductive film 1121, and cooperates with the positive electrode connecting member 1122 to enable the current to continuously flow through the conductive film 1121, thereby stably generating heat.

[0062] The heat insulation layer 12 is arranged on the side of the second insulating layer 113 away from the heating film 112. As the main support structure in the heating assembly 1, the side of the heat insulation layer 12 away from the second insulating layer 113 can be provided in the form of a plane, thereby facilitating the stable placement of the heating assembly 1 on a table top. The heat insulation layer 12 can also reduce the loss of heat generated by the heating layer 11 to the area below the warming plate 2, thereby reducing the heat transfer to the placement surface such as a table top, preventing the table top from being damaged due to overheating, and improving the utilization rate and the heating rate of the heat, which helps to reduce the energy loss of the heating assembly 1. The heat insulation layer 12 can be made of aerogel felt material, foamed cotton, fiberglass cloth, polypropylene, silica gel, ceramic fiber paper, etc., which has a low thermal conductivity, thereby effectively insulating the heat emitted by the heating layer 11 towards the table top.

[0063] The first insulating layer 111, the heating film 112 and the second insulating layer 113 can be connected by hot pressing or bonded by high-temperature-resistant glue. For example, silicone glue can be used, which has good high-temperature resistance, flexibility and electrical insulation. When connecting the first insulating layer 111 and the heating film 112, the glue is evenly applied to the surface of the first insulating layer 111, then the heating film 112 is placed on the first insulating layer 111, the glue is applied to the heating film 112, and the second insulating layer 113 is placed on the heating film 112, so as to realize the manufacturing of the heating layer 11. The heating layer 11 and the heat insulation layer 12 can be fixed together by clamping, bonding or magnetic connection. For example, a clamping groove and a clamping buckle matched with each other can be arranged at the corresponding positions of the periphery of the heating layer 11 and the heat insulation layer 12, the clamping buckle is inserted into the clamping groove, and the tight connection of the heating layer 11 and the heat insulation layer 12 is realized. In addition, this mode is convenient for disassembling the heating layer 11 and the heat insulation layer 12. During the use of the heating assembly 1, the clamping buckle and the clamping groove can be separated, so that the heating layer 11 or the heat insulation layer 12 can be replaced or repaired.

[0064] The utility model uses the conductive film 1121, the positive pole electric connection spare 1122 and the negative pole electric connection spare 1123 to constitute the heating film 112, wherein the positive pole electric connection spare 1122 and the negative pole electric connection spare 1123 can be conducted with external power supply, and the current is guided to flow through the conductive film 1121, and then the planar heating is realized, so that when the heating assembly 1 generates heat, the heat distribution is more uniform, the heating effect of the warm vegetable plate 2 made of the heating assembly 1 on the object to be heated is improved, and the risk of insulation failure of the heating assembly 1 caused by local overheating is reduced.

[0065] In an embodiment, referring to Figure 3 and Figure 4 , the conductive film 1121 includes a first side edge 1121a and a second side edge 1121b oppositely arranged along a first direction H1, the positive pole electric connection spare 1122 extends along the first side edge 1121a, and the negative pole electric connection spare 1123 extends along the second side edge 1121b.

[0066] The positive pole electric connection spare 1122 and the negative pole electric connection spare 1123 extend along the side edges of the conductive film 1121, which helps to form a uniform and stable current loop in the heating film 112. The current can flow into the conductive film 1121 from the positive pole electric connection spare 1122, uniformly conduct to the second side edge 1121b in the conductive film 1121, and finally flow out through the negative pole electric connection spare 1123. Since the current path covers a large area of the conductive film 1121, the heat generated by the conductive film 1121 is more uniform, so that a stable heating environment can be better provided for the dishes placed thereon, the dishes are uniformly heated, and the taste and quality are maintained.

[0067] For example, when the conductive film 1121 is rectangular, the positive electrode connecting member 1122 and the negative electrode connecting member 1123 can be arranged in a strip shape and connected to two opposite sides of the conductive film 1121, so that the current can uniformly flow through the rectangular conductive film 1121; if the conductive film 1121 is elliptical, the positive electrode connecting member 1122 and the negative electrode connecting member 1123 can be arranged in a curved strip shape, so that the positive electrode connecting member 1122 and the negative electrode connecting member 1123 can be connected to the first curved side 1121a and the second curved side 1121b of the conductive film 1121 respectively, thereby ensuring that the current can flow through most of the area of the conductive film 1121.

[0068] In an embodiment, the first insulating layer 111 includes a third side 1111 and a fourth side 1112 arranged oppositely, the third side 1111 is close to the first side 1121a, and the fourth side 1112 is close to the second side 1121b; wherein,

[0069] The distance between the positive electrode connecting member 1122 and the third side is 1mm to 10mm; and / or, the distance between the negative electrode connecting member 1123 and the fourth side is 1mm to 10mm; and / or, the ratio of the length of the positive electrode connecting member 1122 to the length of the first side 1121a along the extension direction of the first side 1121a is between 0.8 to 1.2; and / or, the ratio of the length of the negative electrode connecting member 1123 to the length of the second side 1121b along the extension direction of the second side 1121b is between 0.8 to 1.2.

[0070] If the distance between the positive electrode connecting member 1122 and the third side is less than 1mm, the positive electrode connecting member 1122 is too close to the edge of the first insulating layer 111, and since the positive electrode connecting member 1122 itself has a certain thickness, the connection between the first insulating layer 111 and the second insulating layer 113 is not tight enough, which is easy to separate under external force, thereby exposing the heat-conducting film and the positive electrode connecting member 1122 to the external environment, which has a great safety hazard. If the distance between the positive electrode connecting member 1122 and the third side is greater than 10mm, the area between the positive electrode connecting member 1122 and the third side 1111 is too large, resulting in a large volume of the heating assembly 1, which is not easy to store and use. Therefore, in the embodiment of the present application, the distance between the positive electrode connecting member 1122 and the third side 1111 is set to be between 1mm to 10mm, for example, it can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, so that the first insulating layer 111 and the second insulating layer 113 can maintain a tight connection under the condition that the volume of the heating layer 11 is small, thereby reducing the probability of exposure of the heat-conducting film and prolonging the service life of the heating assembly 1.

[0071] If the ratio of the length of the positive electrode electrical connecting piece 1122 to the length of the first side is less than 0.8, the length of the positive electrode electrical connecting piece 1122 is small, and the current only flows into part of the area of the conductive film 1121, and the remaining part of the conductive film 1121 cannot be reasonably utilized, resulting in uneven heat distribution. If the ratio of the length of the positive electrode electrical connecting piece 1122 to the length of the first side is greater than 1.2, the length of the positive electrode electrical connecting piece is too long, which increases the manufacturing cost and easily affects the connection between the first insulating layer 111 and the second insulating layer 113. Therefore, in the embodiment of the utility model, the ratio of the length of the positive electrode electrical connecting piece 1122 to the length of the second side 1121b is set to be between 0.8 and 1.2, and the ratio can be 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15, 1.2, for example, so that most of the area of the conductive film 1121 can normally generate heat, and the probability of the positive electrode electrical connecting piece 1122 being installed outside the conductive film 1121 is reduced, and the connection between the positive electrode electrical connecting piece 1122 and the conductive film 1121 is more closely. Preferably, when the ratio is 1, that is, when the length of the positive electrode electrical connecting piece 1122 is equal to the length of the second side 1121b, the current can pass through the entire conductive film 1121, and the utilization rate of the material of the positive electrode electrical connecting piece 1122 reaches the maximum.

[0072] The negative electrode electrical connecting piece 1123 is arranged in the same way as the positive electrode electrical connecting piece 1122, which will not be described here.

[0073] In an embodiment, with reference to Figure 5 The heating assembly 1 further comprises a waterproof layer 13, and at least part of the waterproof layer 13 is arranged on the side of the heat insulation layer 12 away from the heating layer 11.

[0074] The waterproof layer 13 can be made of polyethylene terephthalate, oxford cloth and the like, so as to effectively block the penetration of impurities such as water and oil stains, and prevent the heating layer 11 or the heat insulation layer 12 from being affected. In addition, the waterproof layer 13 has high mechanical strength and can withstand a certain degree of external pulling and friction. During the use of the heating assembly 1, even if it is collided or scraped, it is not easy to be damaged, so as to continuously maintain good waterproof function. The waterproof layer 13 and the heat insulation layer 12 can be bonded by glue, or the waterproof layer 13 and the heat insulation layer 12 can be compounded together by a hot pressing process, so as to minimize the air gap between the waterproof layer 13 and the heat insulation layer 12, and further improve the connection strength of the waterproof layer 13 and the heat insulation layer 12.

[0075] In an embodiment, with reference to Figure 6The waterproof layer 13 comprises a bearing part 131 and a flange part 132.

[0076] As part of the food to be heated usually contains a large amount of liquid, when the heating assembly 1 is used, the liquid may flow along the side of the heating assembly 1. Due to the process, there is often a gap between the heating layer 11 and the heat insulation layer 12. Therefore, in the embodiment of the utility model, the waterproof layer 13 is divided into the bearing part 131 and the flange part 132. The flange part 132 is in an upwardly turned posture and is connected to the side of the heating layer 11 away from the heat insulation layer 12. The flange part 132 can cover the side of the heating layer 11 and the heat insulation layer 12, thereby reducing the probability of liquid seeping between the heating layer 11 and the heat insulation layer 12 and improving the safety of the heating assembly 1. At the same time, the waterproof layer 13 can also provide additional protection for the heating layer 11, preventing external impurities such as dust and smoke from directly contacting the heating layer 11 and avoiding damage to the heating layer 11 or affecting the heating efficiency.

[0077] In some embodiments, the flange part 132 is annular, thereby covering the side of the heating layer 11 and the heat insulation layer 12. No matter which side the liquid flows through, it will be separated by the waterproof layer 13, thereby achieving the maximum protection effect for the heating layer 11 and the heat insulation layer 12.

[0078] In some embodiments, the flange part 132 and the bearing part 131 are made of the same material, so that the entire waterproof layer 13 is integrally formed, thereby reducing the manufacturing difficulty of the waterproof layer 13.

[0079] In an embodiment, waterproof glue is arranged between the flange part 132 and the heating layer 11; and / or, the flange part 132 and the heating layer 11 are connected by sewing thread.

[0080] In some embodiments, the flange part 132 and the heating layer 11 are connected by waterproof glue. As the waterproof glue can fill the small gap between the flange part 132 and the heating layer 11, a continuous and tight sealing layer can be formed between the flange part 132 and the heating layer 11, which can effectively prevent liquid from seeping from the connection between the flange part 132 and the heating layer 11, thereby protecting the internal components such as the heating layer 11 and the heat insulation layer 12 from corrosion. The process step of connecting by using waterproof glue is relatively simple. In the production process, only the appropriate amount of waterproof glue is evenly applied on the contact surface of the flange part 132 and the heating layer 11, and then the two are attached, which has high production efficiency.

[0081] In some embodiments, the sewing thread is made of polyester fiber, nylon, aramid fiber, etc., which has high mechanical strength, so that the flange portion 132 and the heating layer 11 can be firmly sewn together. Moreover, the corrosion resistance of the sewing thread is better, and even if the liquid continuously penetrates the sewing thread, the sewing thread can still maintain good strength for a long time, thereby ensuring the stability of the connection and improving the service life of the heating assembly 1.

[0082] In some embodiments, the thickness of the bearing portion 131 is less than or equal to 3 mm.

[0083] If the thickness of the bearing portion 131 is greater than 3 mm, the bearing portion 131 is thicker, which increases the mass of the heating assembly 1, thereby reducing the portability of the heating assembly 1. Moreover, the increase in the thickness of the bearing portion 131 affects the difficulty of rolling the heating assembly 1, thereby affecting the user experience. Therefore, in the embodiments of the present application, the thickness of the bearing portion 131 is set to be less than 3 mm, for example, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm, so that the bearing portion 131 has good strength and can provide good waterproof performance, while the thickness of the bearing portion 131 is not too large, thereby reducing the mass of the heating assembly 1 and improving the portability of the heating assembly 1.

[0084] In some embodiments, the conductive film 1121 includes at least one of a metal film and a metal oxide film. The metal film can be made of copper foil, nickel foil, etc., and the metal oxide film can be made of indium tin oxide film, etc., which are not limited in the embodiments of the present application.

[0085] In some embodiments, the thickness of the conductive film 1121 is between 80 nm and 200 nm; and / or,

[0086] The thickness of the heat insulation layer 12 is between 4 mm and 20 mm; and / or,

[0087] The thickness of the heating assembly 1 is between 5 mm and 30 mm.

[0088] If the thickness of the conductive film 1121 is less than 80 nm, the strength of the conductive film 1121 is low, which causes the heating assembly 1 to be damaged under external force during use. If the conductive film 1121 is composed of a nano-heating coating, the too thin conductive film 1121 reduces the contact probability between the conductive particles, thereby increasing the resistance of the conductive film 1121 and reducing the uniformity of the heating of the conductive film 1121. If the thickness of the conductive film 1121 is greater than 200 nm, the cost of manufacturing the conductive film 1121 increases, and the too thick conductive film 1121 reduces the flexibility of the heating assembly 1. Therefore, the thickness of the conductive film 1121 is set to be between 80 nm and 200 nm in the embodiment of the present application, for example, 80 nm, 85 nm, 90 nm, 95 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, 150 nm, 160 nm, 170 nm, 180 nm, 190 nm, 200 nm, etc., so that the conductive film has good structural strength, and the manufacturing cost of the conductive film 1121 is controlled within a proper range.

[0089] If the thickness of the heat insulation layer 12 is less than 4 mm, the thickness of the heat insulation layer 12 is small, the heat insulation effect is poor, and the heating assembly 1 is easy to damage the table top. If the thickness of the heat insulation layer 12 is greater than 20 mm, the thickness of the heat insulation layer 12 is too large, which reduces the portability of the heating assembly 1. Therefore, the thickness of the heat insulation layer 12 is set to be between 4 mm and 20 mm in the embodiment of the present application, for example, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, so that the heat insulation layer 12 has good heat insulation effect, and the overall thickness of the heating assembly 1 is not too large, which is convenient for users to carry and use.

[0090] If the thickness of the heating assembly 1 is less than 5 mm, the thickness of each component in the heating assembly 1 is small, which is difficult to manufacture and has low mechanical strength and is easy to be damaged. If the thickness of the heating assembly 1 is greater than 30 mm, the heating assembly 1 is too thick, which greatly reduces the portability. Therefore, the thickness of the heating assembly 1 is set to be between 5 mm and 30 mm in the embodiment of the present application, for example, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, so that the heating assembly 1 has good mechanical strength and is convenient to carry, thereby improving the user experience.

[0091] In some embodiments, reference is made to Figure 7The heating assembly 1 further comprises a heat-conducting layer 14 arranged between the heating layer 11 and the heat-insulating layer 12.

[0092] Since the heat source in the middle region of the heating layer 11 is more than that in the edge region of the heating layer 11, the temperature of the middle region of the heating layer 11 is higher, so that more heat in this region is conducted to the tabletop through the heat-insulating layer 12, thereby causing damage to the tabletop. Therefore, the embodiment of the present application additionally arranges a heat-conducting layer 14 between the heating layer 11 and the heat-insulating layer 12, which can effectively uniformly transmit the heat generated by the heating layer 11 to each region of the heat-conducting layer 14, thereby avoiding the phenomenon of local overheating, and reducing the temperature of the middle region of the heating layer 11 and the damage to the tabletop. The heat-conducting layer 14 can be made of materials with high electrical conductivity, such as metal, alloy, graphite, and aluminum oxide, so as to better diffuse heat to each position of the heat-conducting layer 14.

[0093] According to a second aspect of the present application, a warming cutting board 2 is provided, comprising: the heating assembly 1 in the foregoing embodiments; and a control module electrically connected with the heating assembly 1, for controlling the heating assembly 1. The warming cutting board 2 comprises the heating assembly 1 described above, so that the warming cutting board 2 has all the beneficial effects of the heating assembly 1 described above, which will not be repeated here.

[0094] In an embodiment, referring to Figure 8 The warming cutting board 2 further comprises: a first protective layer 21 arranged on a side of the heating assembly 1 close to the heating layer 11; and / or a second protective layer 22 arranged on a side of the heating assembly 1 away from the heating layer 11.

[0095] The first protective layer 21 and the second protective layer 22 can cover the heating assembly 1 in the warming cutting board 2, thereby achieving protection of the heating assembly 1. Taking the first protective layer 21 as an example, the first protective layer 21 can be glass fiber cloth, which has good high-temperature resistance and a relatively soft material that will not scratch tableware. The first protective layer 21 can be connected with the heating assembly 1 by bonding, hot pressing, or clamping, and the like, which will not be limited in the embodiments of the present application. The second protective layer 22 is similar to the first protective layer 21, which will not be repeated here.

[0096] In an embodiment, referring to Figure 9 The warming cutting board 2 further comprises a protective frame 23 provided with a receiving groove 231, and at least part of the warming cutting board 2 is accommodated in the receiving groove 231.

[0097] The protection frame 23 is similar to a picture frame and is used to protect the peripheral side of the hot plate 2. Since the hot plate 2 is easily damaged by collision, friction or accidental falling during daily use, the peripheral side of the hot plate 2 is accommodated in the accommodation groove 231 of the protection frame 23, so as to effectively buffer the impact force from the outside and prolong the service life of the hot plate 2. The protection frame 23 can be made of wood, plastic, ceramic, rubber, silica gel and the like. Referring to Figure 9 and Figure 10 The protection frame 23 can only protect the corner positions of the hot plate 2, so as to reduce the material of the protection frame 23 and reduce the cost; or the protection frame 23 can be arranged around the hot plate 2 to comprehensively protect the peripheral side of the hot plate 2, and the embodiments of the present application are not limited in this regard.

[0098] The embodiments of the present application are described in detail above, and the principles and implementation modes of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation modes and application ranges will be changed according to the idea of the present application, and the above description should not be understood as a limitation of the present application.

Claims

1. A heating assembly, characterized by, The heating assembly comprises: a heating layer, the heating layer comprising a first insulating layer, a heating film and a second insulating layer, the heating film being sandwiched between the first insulating layer and the second insulating layer, the heating film comprising a conductive thin film, a positive electrode connecting piece and a negative electrode connecting piece, the positive electrode connecting piece and the negative electrode connecting piece being arranged at two sides of the conductive thin film, and the positive electrode connecting piece, the negative electrode connecting piece and the conductive thin film being in the same horizontal plane, the positive electrode connecting piece and the negative electrode connecting piece being used for connecting an external power supply to guide electric current to flow through the conductive thin film; and a heat insulation layer, the heat insulation layer being arranged on a side of the second insulating layer away from the heating film; the heating assembly further comprises a waterproof layer, at least part of the waterproof layer being arranged on a side of the heat insulation layer away from the heating layer.

2. The heating assembly of claim 1, wherein, The conductive thin film comprises a first side edge and a second side edge arranged oppositely along a first direction, the positive electrode connecting piece extending along the first side edge, and the negative electrode connecting piece extending along the second side edge.

3. The heating assembly of claim 2, wherein, The first insulating layer comprises a third side edge and a fourth side edge arranged oppositely, the third side edge being close to the first side edge, and the fourth side edge being close to the second side edge; wherein a distance between the positive electrode connecting piece and the third side edge is 1mm to 10mm; and / or a distance between the negative electrode connecting piece and the fourth side edge is 1mm to 10mm; and / or a ratio of a length of the positive electrode connecting piece to a length of the first side edge along an extension direction of the first side edge is between 0.8 and 1.2; and / or a ratio of a length of the negative electrode connecting piece to a length of the second side edge along an extension direction of the second side edge is between 0.8 and 1.

2.

4. The heating assembly of claim 1, wherein, The waterproof layer comprises: a bearing part, the bearing part being arranged on a side of the heat insulation layer away from the heating layer; and a turned edge part, one end of the turned edge part being connected to a side edge of the bearing part, and the other end of the turned edge part being located on a side of the heating layer away from the heat insulation layer.

5. The heating assembly of claim 4, wherein, Waterproof glue is arranged between the turned edge part and the heating layer; and / or the turned edge part and the heating layer are connected by sewing thread.

6. The heating assembly of claim 4, wherein, A thickness of the bearing part is less than or equal to 3mm.

7. The heating assembly of any one of claims 1 to 6, wherein, The conductive thin film comprises at least one of a metal thin film and a metal oxide thin film.

8. The heating assembly of any one of claims 1 to 6, wherein, A thickness of the conductive thin film is between 80nm and 200nm; and / or a thickness of the heat insulation layer is between 4mm and 20mm; and / or a thickness of the heating assembly is between 5mm and 30mm.

9. The heating assembly of any one of claims 1 to 6, wherein, The heating assembly further comprises a heat conduction layer, the heat conduction layer being arranged between the heating layer and the heat insulation layer.

10. A warming tray characterized by, comprises: the heating assembly according to any one of claims 1-9; and a control module, the control module being electrically connected to the heating assembly for controlling the heating assembly.

11. The warming tray of claim 10, wherein, The warming chopping board further comprises: a first protective layer, the first protective layer being arranged on a side of the heating assembly close to the heating layer; and / or a second protective layer, the second protective layer being arranged on a side of the heating assembly away from the heating layer.

12. The warming tray of claim 10, wherein, The warming plate further comprises a protection frame provided with a receiving groove, and at least part of the warming plate is accommodated in the receiving groove.

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