Heating assembly and vegetable warming board

Abstract

The invention 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 thin 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. The heating film is composed of the conductive film, the positive electrode electric connecting piece and the negative electrode electric connecting piece, the positive electrode electric connecting piece and the negative electrode electric connecting piece can be connected with an external power source, current is guided to flow through the sheet-shaped conductive film, then plane type heating is achieved, and when the heating assembly generates heat, heat distribution is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of vegetable warming boards, and in particular to a heating component and a vegetable warming board. Background Art

[0002] A food warming plate is a heating device that generates heat through a heating mechanism and transfers the heat to the food placed on the food warming plate, thereby meeting the need to keep the food warm.

[0003] Existing food warming plates usually use resistance wires for heating, and the resistance wires are wound, and the heat generated during heating is unevenly distributed, resulting in extremely low temperatures in some areas of the food warming plate and poor insulation effect. Summary of the invention

[0004] The embodiments of the present invention provide a heating component and a food warming plate, which can improve the technical problem of uneven heating in the related art.

[0005] In a first aspect, an embodiment of the present invention provides a heating assembly for a vegetable warming plate, the heating assembly comprising:

[0006] 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 film, a positive electrical connector and a negative electrical connector, the positive electrical connector and the negative electrical connector being spaced apart on both sides of the conductive film, and the positive electrical connector, the negative electrical connector and the conductive film being in the same horizontal plane, the positive electrical connector and the negative electrical connector being used to connect to an external power source to guide current to flow through the conductive film; and,

[0007] A heat insulation layer is arranged on a side of the second insulating layer away from the heating film.

[0008] In one embodiment, the conductive film includes a first side and a second side that are arranged opposite to each other along a first direction, the positive electrode electrical connector extends along the first side, and the negative electrode electrical connector extends along the second side.

[0009] In one embodiment, the first insulating layer includes a third side and a fourth side that are arranged opposite to each other, the third side is close to the first side, and the fourth side is close to the second side; wherein,

[0010] The distance between the positive electrode electrical connector and the third side is 1 mm to 10 mm; and / or,

[0011] The distance between the negative electrode electrical connector and the fourth side is 1 mm to 10 mm; and / or,

[0012] Along the extension direction of the first side, the ratio of the length of the positive electrode electrical connector to the length of the first side is between 0.8 and 1.2; and / or,

[0013] Along the extension direction of the second side, the ratio of the length of the negative electrode electrical connector to the length of the second side is between 0.8 and 1.2.

[0014] In one embodiment, the heating component further comprises a waterproof layer, and at least a portion of the waterproof layer is disposed on a side of the thermal insulation layer facing away from the heating layer.

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

[0016] a bearing portion, the bearing portion being arranged on a side of the heat insulating layer away from the heating layer; and

[0017] A flange portion, one end of which is connected to the side of the bearing portion, and the other end of which is located on a side of the heating layer away from the heat insulating layer.

[0018] In one embodiment, a waterproof glue is provided between the flange portion and the heating layer; and / or,

[0019] The flange portion and the heating layer are connected via sewing thread.

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

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

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

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

[0024] The thickness of the heating component is between 5 mm and 30 mm.

[0025] In one embodiment, the heating component further comprises a heat-conducting layer, and the heat-conducting layer is arranged between the heating layer and the heat-insulating layer.

[0026] In a second aspect, an embodiment of the present invention provides a vegetable warming plate, comprising:

[0027] A heating assembly as described in the preceding embodiments; and

[0028] A control module is electrically connected to the heating component to control the heating component.

[0029] In one embodiment, the food warming plate further comprises:

[0030] A first protective layer, the first protective layer is arranged on a side of the heating component close to the heating layer; and / or,

[0031] A second protective layer is arranged on a side of the heating component away from the heating layer.

[0032] In one embodiment, the warming plate further comprises a protection frame, wherein the protection frame is provided with a receiving groove, and at least a portion of the warming plate is received in the receiving groove.

[0033] Beneficial effects of the embodiments of the present invention:

[0034] In an embodiment of the present invention, a heating film is composed of a conductive film, a positive electrical connector and a negative electrical connector, wherein the positive electrical connector and the negative electrical connector can be connected to an external power source to guide the current to flow through the sheet-like conductive film, thereby realizing planar heating. When the heating component generates heat, the heat distribution is more uniform, thereby improving the heating effect of the warming plate made of the heating component on the object to be heated and reducing the risk of insulation failure due to local overheating of the heating component. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 is a cross-sectional view of a heating assembly provided by an embodiment of the present invention;

[0037] Figure 2 is a cross-sectional view of a heating layer provided by an embodiment of the present invention;

[0038] Figure 3 is a schematic structural diagram of a heating film and a first insulating layer provided by an embodiment of the present invention;

[0039] Figure 4 is a schematic structural diagram of a heating film provided by an embodiment of the present invention;

[0040] Figure 5 is a cross-sectional view of a heating assembly provided by an embodiment of the present invention;

[0041] Figure 6 is a cross-sectional view of a heating assembly provided by an embodiment of the present invention;

[0042] Figure 7is a cross-sectional view of a heating assembly provided by an embodiment of the present invention;

[0043] Figure 8 is a cross-sectional view of a vegetable warming plate provided by an embodiment of the present invention;

[0044] Fig. 9 is a cross-sectional view of a vegetable warming plate provided by an embodiment of the present invention;

[0045] Fig.10 It is a cross-sectional view of a vegetable warming plate provided in an embodiment of the present invention.

[0046] The numbers in the figure are:

[0047] 1. Heating component;

[0048] 11. Heating layer;

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

[0050] 112, heating film; 1121, conductive film; 1121a, first side; 1121b, second side; 1122, positive electrode electrical connector; 1123, negative electrode electrical connector;

[0051] 113. a second insulating layer;

[0052] 12. Thermal insulation layer;

[0053] 13. waterproof layer; 131. bearing portion; 132. flange portion;

[0054] 14. Thermal conductive layer;

[0055] 2. Warming plate; 21. First protective layer; 22. Second protective layer; 23. Protective frame; 231. Accommodating groove;

[0056] H1, first direction. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0058] Reference Figures 1 to 3 In a first aspect, the present invention provides a heating component 1 for a vegetable warming plate 2, the heating component 1 comprising: a heating layer 11, the heating layer 11 comprising a first insulating layer 111, a heating film 112 and a second insulating layer 113, the heating film 112 being sandwiched between the first insulating layer 111 and the second insulating layer 113, the heating film 112 comprising a conductive film 1121, a positive electrode electrical connector 1122 and a negative electrode electrical connector 1123, the positive electrode electrical connector 1122 and the negative electrode electrical connector 1123 being spaced apart on both sides of the conductive film 1121, and the positive electrode electrical connector 1122, the negative electrode electrical connector 1123 and the conductive film 1121 being in the same horizontal plane, the positive electrode electrical connector 1122 and the negative electrode electrical connector 1123 being used to connect an external power supply to guide current to flow through the conductive film 1121; a heat insulating layer 12, the heat insulating layer 12 being arranged on a side of the second insulating layer 113 away from the heating film 112.

[0059] During actual use, the positive electrode electrical connector 1122 and the negative electrode electrical connector 1123 are connected to an external power source to guide the current to continuously flow through the conductive film 1121. Since the conductive film 1121 has a small amount of resistance, according to Joule's law, the conductive film 1121 can continuously convert electrical energy into thermal energy, thereby emitting a relatively high amount of heat. This heat can be transferred upward through the first insulating layer 111, so that the dishes placed on this side of the first insulating layer 111 maintain a suitable temperature. The first insulating layer 111 ensures the safety of the dishes during the heating process and prevents dangerous situations such as leakage. It is understandable that additional protective layers, shells and other structures can be set on the first insulating layer 111 to improve the uniformity of the surface temperature of the first insulating layer 111, or to protect the first insulating layer 111. At this time, the dishes can be placed on the protective layer or shell.

[0060] Among them, the first insulating layer 111 is used to isolate the heating film 112 from the external environment to prevent current leakage, and at the same time provide a certain protection for the heating film 112, so as to prevent the heating film 112 from being damaged due to factors such as carrying heavy objects and accidentally falling during use, thereby ensuring 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 set to be greater than or equal to 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, polyesterimide, polyethylene terephthalate, etc., all of which have good insulation and high-temperature resistance. At the same time, it is relatively soft and does not affect the user's winding and storage of the heating component 1. The first insulating layer 111 is usually a sheet structure, and its side facing away from the heating film 112 can be set as a flat surface, so as to facilitate the placement of dishes. The configuration of the second insulating layer 113 is similar to that of the first insulating layer 111 , and will not be described in detail herein.

[0061] The heating film 112 includes a conductive film 1121 and a positive electrical connector 1122 and a negative electrical connector 1123 connected to the conductive film 1121, wherein the positive electrical connector 1122 and the negative electrical connector 1123 are respectively arranged on both sides of the conductive film 1121, that is, the positive electrical connector 1122, the negative electrical connector 1123 and the conductive film 1121 are in the same plane, thereby reducing the overall thickness of the heating film 112 and allowing the heat generated by the heating layer to be quickly conducted to the heated object. The conductive film 1121, as the heating part of the heating component 1, can be made of graphene materials, indium tin oxide powder, etc., and has good conductivity. When current passes through, due to the resistance characteristics of the conductive film 1121 itself, electrical energy is converted into thermal energy, thereby generating heat to keep the dishes on the warming plate 2 warm. Reference Figure 3 and Figure 4, the positive electrode electrical connector 1122 and the negative electrode electrical connector can be set as a strip of metal, and its length can be determined according to the size of the heating film 112, and the positive electrode electrical connector 1122 and the negative electrode electrical connector 1123 can be set as a strip of metal, and one end of the strip of metal is tightly connected to the conductive film 1121, and the other end extends outside the first insulating layer 111 and the second insulating layer 113 to connect to an external power source. Exemplarily, copper foil can be used as the positive electrode electrical connector 1122 and the negative electrode electrical connector 1123. Since copper has good conductivity and low resistance, it can reduce the loss of electric energy during transmission and ensure that sufficient current flows smoothly into the conductive film 1121. The positive electrical connector 1122 serves as an inlet for current to flow into the conductive film 1121, guiding the positive current of the external power source to the conductive film 1121. The negative electrical connector 1123 serves as an outlet for current to flow out of the conductive film 1121, cooperating with the positive electrical connector 1122 to allow current to continuously flow through the conductive film 1121, thereby generating heat stably.

[0062] The heat-insulating layer 12 is laid on the side of the second insulating layer 113 away from the heating film 112. As the main supporting structure in the heating component 1, the side of the heat-insulating layer 12 away from the second insulating layer 113 can be set to a plane, so as to facilitate the stable placement of the heating component 1 on the desktop. The heat-insulating layer 12 can also reduce the heat generated by the heating layer 11 from being lost to the bottom of the warming plate 2, thereby reducing the heat transfer to the desktop and other placement surfaces, preventing the desktop from being damaged due to overheating, and can also improve the utilization rate of heat and the heating rate, which helps to reduce the energy loss of the heating component 1. The heat-insulating layer 12 can be made of aerogel felt materials, foam cotton, glass fiber cloth, polypropylene, silica gel, ceramic fiber paper and other materials, which have a low thermal conductivity, thereby effectively isolating the heat emitted from the heating layer 11 toward the desktop.

[0063] The first insulating layer 111, the heating film 112 and the second insulating layer 113 can be connected by hot pressing or by bonding with high temperature resistant glue. For example, organic 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, and then the heating film 112 is placed on the first insulating layer 111, and then 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 production of the heating layer 11. The heating layer 11 and the heat insulating layer 12 can be fixed together by means of snap connection, bonding, magnetic connection, etc. Exemplarily, matching slots and buckles can be set at corresponding positions on the circumferential side of the heating layer 11 and the thermal insulation layer 12. By inserting the buckle into the slot, the heating layer 11 and the thermal insulation layer 12 can be tightly connected. This method also facilitates the disassembly between the heating layer 11 and the thermal insulation layer 12. During the use of the heating component 1, the buckle can be separated from the slot to replace or repair the heating layer 11 or the thermal insulation layer 12.

[0064] The present invention uses a conductive film 1121, a positive electrical connector 1122 and a negative electrical connector 1123 to form a heating film 112, wherein the positive electrical connector 1122 and the negative electrical connector 1123 can be connected to an external power source to guide the current to flow through the sheet-like conductive film 1121, thereby realizing planar heating, so that when the heating component 1 generates heat, the heat distribution is more uniform, thereby improving the heating effect of the warming plate 2 made of the heating component 1 on the object to be heated, and reducing the risk of insulation failure of the heating component 1 due to local overheating.

[0065] In one embodiment, referring to Figure 3 and Figure 4 The conductive film 1121 includes a first side 1121a and a second side 1121b that are oppositely arranged along the first direction H1, the positive electrode electrical connector 1122 extends along the first side 1121a, and the negative electrode electrical connector 1123 extends along the second side 1121b.

[0066] The positive electrode electrical connector 1122 and the negative electrode electrical connector 1123 extend along the side of the conductive film 1121, which helps to form a uniform and stable current loop in the heating film 112. The current can flow from the positive electrode electrical connector 1122 into the conductive film 1121, and evenly conduct to the second side 1121b in the conductive film 1121, and finally flow out through the negative electrode electrical connector 1123. Since the current path covers a larger 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, so that the dishes are heated uniformly everywhere, and maintain a good taste and quality.

[0067] Exemplarily, when the conductive film 1121 is rectangular, the positive electrical connector 1122 and the negative electrical connector 1123 can be set as long strips and respectively connected to the two opposite sides of the conductive film 1121, so that the current can flow evenly through the rectangular conductive film 1121; if the conductive film 1121 is elliptical, the positive electrical connector 1122 and the negative electrical connector 1123 can be set as curved strips, so that the positive electrical connector 1122 and the negative electrical connector 1123 can be respectively connected to the first side 1121a and the second side 1121b of the curved conductive film 1121, thereby ensuring that the current can flow through most areas of the conductive film 1121.

[0068] In one embodiment, the first insulating layer 111 includes a third side 1111 and a fourth side 1112 that are oppositely disposed, 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 electrical connector 1122 and the third side is 1 mm to 10 mm; and / or, the distance between the negative electrode electrical connector 1123 and the fourth side is 1 mm to 10 mm; and / or, along the extension direction of the first side 1121a, the ratio of the length of the positive electrode electrical connector 1122 to the length of the first side 1121a is between 0.8 and 1.2; and / or, along the extension direction of the second side 1121b, the ratio of the length of the negative electrode electrical connector 1123 to the length of the second side 1121b is between 0.8 and 1.2.

[0070] If the distance between the positive electrode electrical connector 1122 and the third side is less than 1mm, the positive electrode electrical connector 1122 is too close to the edge of the first insulating layer 111. Since the positive electrode electrical connector 1122 itself has a certain thickness, the connection between the first insulating layer 111 and the second insulating layer 113 is not tight enough, and it is easy to separate under the action of external force, thereby exposing the thermal conductive film and the positive electrode electrical connector 1122 to the external environment, posing a great safety hazard. If the distance between the positive electrode electrical connector 1122 and the third side is greater than 10mm, the area between the positive electrode electrical connector 1122 and the third side 1111 is too large, resulting in a large volume of the heating component 1, which is not easy to store and use. Therefore, in the embodiment of the present invention, the distance between the positive electrode electrical connector 1122 and the third side 1111 is set between 1mm and 10mm. Exemplarily, it can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm. This allows the first insulating layer 111 and the second insulating layer 113 to maintain a tight connection even when the volume of the heating layer 11 is small, thereby reducing the probability of exposure of the thermal conductive film and extending the service life of the heating component 1.

[0071] If the ratio of the length of the positive electrode electrical connector 1122 to the length of the first side is less than 0.8, the length of the positive electrode electrical connector 1122 is small, and the current flows only in a part of the conductive film 1121, and the remaining part of the conductive film 1121 cannot be reasonably used, resulting in uneven heat distribution. If the ratio of the length of the positive electrode electrical connector 1122 to the length of the first side is greater than 1.2, the length of the positive electrode electrical connector is too long, which not only increases the manufacturing cost, but also easily affects the connection between the first insulating layer 111 and the second insulating layer 113. Therefore, in the embodiment of the present invention, the ratio of the length of the positive electrode electrical connector 1122 to the length of the second side 1121b is set between 0.8 and 1.2. For example, the ratio can be between 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15, and 1.2, so that most areas of the conductive film 1121 can generate heat normally, and the probability of the positive electrode electrical connector 1122 being installed outside the conductive film 1121 is reduced, and the connection between the positive electrode electrical connector 1122 and the conductive film 1121 is also tighter. Preferably, when the ratio is 1, that is, when the length of the positive electrode electrical connector 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 connector 1122 is maximized.

[0072] The configuration of the negative electrode electrical connector 1123 is similar to that of the positive electrode electrical connector 1122 and will not be described in detail herein.

[0073] In one embodiment, referring to Figure 5 The heating component 1 also includes a waterproof layer 13 , at least a portion of the waterproof layer 13 is arranged on a side of the thermal insulation layer 12 away from the heating layer 11 .

[0074] The waterproof layer 13 can be made of materials such as polyethylene terephthalate and Oxford cloth, so as to effectively block the penetration of impurities such as moisture and oil, and prevent the heating layer 11 or the heat insulating layer 12 from being affected; and the waterproof layer 13 has high mechanical strength and can withstand a certain degree of external force pulling and friction. During the use of the heating component 1, even if it is hit or scratched, it is not easy to be damaged, so as to continuously maintain a good waterproof function. The waterproof layer 13 and the heat insulating layer 12 can be bonded by glue, or by a hot pressing process, so that the waterproof layer 13 and the heat insulating layer 12 are compounded together, so that the air gap between the waterproof layer 13 and the heat insulating layer 12 is reduced as much as possible, and the connection strength between the waterproof layer 13 and the heat insulating layer 12 is further improved.

[0075] In one embodiment, referring to Figure 6The waterproof layer 13 includes: a bearing portion 131, which is arranged on the side of the heat insulating layer 12 away from the heating layer 11; a flange portion 132, one end of the flange portion 132 is connected to the side of the bearing portion 131, and the other end of the flange portion 132 is located on the side of the heating layer 11 away from the heat insulating layer 12.

[0076] Since some of the food to be heated usually contains a large amount of liquid, when the heating component 1 of the present invention is used, the liquid may flow along the side of the heating component 1, and due to process reasons, there is often a gap between the heating layer 11 and the insulation layer 12. Therefore, in the embodiment of the present invention, the waterproof layer 13 is divided into a bearing portion 131 and a flange portion 132, wherein the flange portion 132 is in an upwardly turned posture and connected to the side of the heating layer 11 away from the insulation layer 12, so that the flange portion 132 can cover the sides of the heating layer 11 and the insulation layer 12, thereby reducing the probability of liquid penetrating between the heating layer 11 and the insulation layer 12, and improving the safety of the heating component 1. At the same time, the waterproof layer 13 can also play an additional protective role for the heating layer 11, preventing external impurities, such as dust, smoke, etc., from directly contacting the heating layer 11, and avoiding these impurities from damaging the heating layer 11 or affecting its heating efficiency.

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

[0078] In some embodiments, the flange portion 132 and the bearing portion 131 may be made of the same material, so that the entire waterproof layer 13 is formed in one piece, thereby reducing the difficulty of manufacturing the waterproof layer 13 .

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

[0080] In some embodiments, the flange 132 and the heating layer 11 are connected by waterproof glue. Since the waterproof glue can fill the tiny gap that may exist between the two, a continuous and tight sealing layer can be formed between the flange 132 and the heating layer 11, which can effectively prevent liquid from penetrating from the connection between the flange 132 and the heating layer 11, thereby protecting the internal components such as the heating layer 11 and the insulation layer 12 from corrosion. The process steps of connecting with waterproof glue are relatively simple. During the production process, it is only necessary to evenly apply an appropriate amount of waterproof glue on the contact surface between the flange 132 and the heating layer 11, and then fit the two together, which has high production efficiency.

[0081] In some embodiments, the flange portion 132 is connected to the heating layer 11 by sewing thread. The sewing thread can be made of polyester fiber, nylon, aramid fiber and other materials, and has high mechanical strength, so that the flange portion 132 and the heating layer 11 can be firmly sewn together. The sewing thread has better corrosion resistance, and even if the liquid continuously soaks 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 component 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 relatively thick, resulting in an increase in the mass of the heating component 1, thereby reducing the portability of the heating component 1; and the increase in the thickness of the bearing portion 131 will affect the difficulty of curling and storing the heating component 1, affecting the user's experience. Therefore, in the embodiment of the present invention, the thickness of the bearing portion 131 is set to be less than 3 mm, and can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, so that the bearing portion 131 has good strength and can provide good waterproof performance. At the same time, the thickness of the bearing portion 131 is not too large, thereby reducing the mass of the heating component 1 and improving the portability of the heating component 1.

[0084] In some embodiments, the conductive film 1121 includes at least one of a metal film and a metal oxide film, wherein the metal film may be made of materials such as copper foil and nickel foil, and the metal oxide film may be made of materials such as indium tin oxide film, which is not limited in the embodiment of the present invention.

[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 thermal insulation layer 12 is between 4 mm and 20 mm; and / or,

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

[0088] If the thickness of the conductive film 1121 is less than 80nm, the strength of the conductive film 1121 is low, resulting in the thermal conductive film being easily damaged under the action of external force when the heating component 1 is in use, and if the conductive film 1121 is composed of a nano heating coating, an overly 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 200nm, the cost of manufacturing the conductive film 1121 increases, and an overly thick conductive film 1121 reduces the flexibility of the heating component 1. Therefore, the embodiment of the present invention sets the thickness of the conductive film 1121 between 80nm and 200nm. Exemplarily, it can be 80nm, 85nm, 90nm, 95nm, 100nm, 110nm, 120nm, 130nm, 140nm, 150nm, 160nm, 170nm, 180nm, 190nm, 200nm, etc., so that the thermally conductive film has better structural strength while controlling the production cost of the conductive film 1121 within an appropriate range.

[0089] If the thickness of the heat insulating layer 12 is less than 4 mm, the thickness of the heat insulating layer 12 is small, the heat insulating effect is poor, and the heating component 1 is easy to damage the desktop; if the thickness of the heat insulating layer 12 is greater than 20 mm, the thickness of the heat insulating layer 12 is too large, which reduces the portability of the heating component 1. Therefore, the embodiment of the present invention sets the thickness of the heat insulating layer 12 between 4 mm and 20 mm, and illustratively, it can be 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 insulating layer 12 maintains a good heat insulating effect while ensuring that the overall thickness of the heating component 1 is not too large, which is convenient for users to carry and use.

[0090] If the thickness of the heating component 1 is less than 5mm, the thickness of each component in the heating component 1 is small, the manufacturing difficulty is large, and the mechanical strength is low, and it is easy to be damaged; if the thickness of the heating component 1 is greater than 30mm, the heating component 1 is too thick and the portability is greatly reduced. Therefore, the embodiment of the present invention sets the thickness of the heating component 1 between 5mm and 30mm, and illustratively, it can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, so as to ensure that the heating component 1 has good mechanical strength while making the heating component 1 easy to carry and improving the user experience.

[0091] In some embodiments, reference Figure 7 The heating component 1 also includes a heat-conducting layer 14 , which is disposed between the heating layer 11 and the heat-insulating layer 12 .

[0092] Since there are more heat sources in the middle area of ​​the heating layer 11 than in the edge area of ​​the heating layer 11, the temperature in the middle area of ​​the heating layer 11 is higher, so that the heat in this area is more transferred to the desktop through the thermal insulation layer 12, thereby causing damage to the desktop. Therefore, in the embodiment of the present invention, an additional heat-conducting layer 14 is provided between the heating layer 11 and the thermal insulation layer 12, which can effectively and evenly transfer the heat generated by the heating layer 11 to various areas of the heat-conducting layer 14, thereby avoiding local overheating, thereby reducing the temperature of the middle area of ​​the heating layer 11 and reducing damage to the desktop. The heat-conducting layer 14 can be made of materials with high conductivity, such as metals, alloys, graphite, and alumina, so as to better diffuse heat to various positions of the heat-conducting layer 14.

[0093] According to a second aspect of the present invention, a vegetable warming board 2 is provided, comprising: the heating component 1 in the aforementioned embodiment; and a control module, the control module being electrically connected to the heating component 1 for controlling the heating component 1. The vegetable warming board 2 comprises the aforementioned heating component 1, so the vegetable warming board 2 has all the beneficial effects of the aforementioned heating component 1, and the embodiments of the present invention are not described in detail herein.

[0094] In one embodiment, referring to Figure 8 The warming plate 2 also includes: a first protective layer 21, which is arranged on a side of the heating component 1 close to the heating layer 11; and / or a second protective layer 22, which is arranged on a side of the heating component 1 away from the heating layer 11.

[0095] The first protective layer 21 and the second protective layer 22 can cover the heating component 1 in the warm food plate 2, thereby protecting the heating component 1. Taking the first protective layer 21 as an example, the first protective layer 21 can be a fiberglass cloth, which has good high temperature resistance, and the fiberglass cloth is relatively soft and will not scratch the tableware. The first protective layer 21 can be connected to the heating component 1 by bonding, hot pressing or clamping, and the embodiment of the present invention does not limit this. The second protective layer 22 is similar to the first protective layer 21 and will not be repeated here.

[0096] In one embodiment, referring to Fig. 9 The warming plate 2 also includes a protection frame 23 , and the protection frame 23 is provided with a receiving groove 231 , and at least a part of the warming plate 2 is received in the receiving groove 231 .

[0097] The protective frame 23 is similar to a picture frame and is used to protect the side of the warming board 2. Since the warming board 2 is easily hit, rubbed, or accidentally dropped during daily use, the side of the warming board 2 that is easily damaged is accommodated in the receiving groove 231 of the protective frame 23, which can effectively buffer the impact of the outside world and extend the service life of the warming board 2. The protective frame 23 can be made of wood, plastic, ceramic, rubber, silicone, etc. Fig. 9 and Fig.10 The protection frame 23 can only protect the corners of the warming board 2, thereby reducing the material used for the protection frame 23 and reducing costs; the protection frame 23 can also be arranged around the warming board 2 to achieve more comprehensive protection for the surrounding side of the warming board 2, and the embodiment of the present invention is not limited to this.

[0098] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A heating component, characterized in that: 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 film, a positive electrical connector and a negative electrical connector, the positive electrical connector and the negative electrical connector being spaced apart on both sides of the conductive film, and the positive electrical connector, the negative electrical connector and the conductive film being in the same horizontal plane, the positive electrical connector and the negative electrical connector being used to connect to an external power source to guide current to flow through the conductive film; and, A heat insulation layer is arranged on a side of the second insulating layer away from the heating film.

2. The heating assembly according to claim 1, characterized in that The conductive film comprises a first side and a second side that are arranged opposite to each other along a first direction, the positive electrode electrical connector extends along the first side, and the negative electrode electrical connector extends along the second side.

3. The heating assembly according to claim 2, characterized in that The first insulating layer includes a third side and a fourth side that are arranged opposite to each other, the third side is close to the first side, and the fourth side is close to the second side; wherein, The distance between the positive electrode electrical connector and the third side is 1 mm to 10 mm; and / or, The distance between the negative electrode electrical connector and the fourth side is 1 mm to 10 mm; and / or, Along the extension direction of the first side, the ratio of the length of the positive electrode electrical connector to the length of the first side is between 0.8 and 1.2; and / or, Along the extension direction of the second side, the ratio of the length of the negative electrode electrical connector to the length of the second side is between 0.8 and 1.

2.

4. The heating assembly according to claim 1, characterized in that The heating component further comprises a waterproof layer, at least a portion of which is arranged on a side of the heat insulating layer away from the heating layer.

5. The heating assembly according to claim 4, characterized in that The waterproof layer comprises: a bearing portion, the bearing portion being arranged on a side of the heat insulating layer away from the heating layer; and A flange portion, one end of which is connected to the side of the bearing portion, and the other end of which is located on a side of the heating layer away from the heat insulating layer.

6. The heating assembly according to claim 5, characterized in that A waterproof glue is provided between the flange portion and the heating layer; and / or, The flange portion and the heating layer are connected via sewing thread.

7. The heating assembly according to claim 5, characterized in that The thickness of the bearing portion is less than or equal to 3 mm.

8. The heating assembly according to any one of claims 1 to 7, characterized in that: The conductive film includes at least one of a metal film and a metal oxide film.

9. The heating assembly according to any one of claims 1 to 7, characterized in that: The thickness of the conductive film is between 80nm and 200nm; and / or, The thickness of the thermal insulation layer is between 4 mm and 20 mm; and / or, The thickness of the heating component is between 5 mm and 30 mm.

10. The heating assembly according to any one of claims 1 to 7, characterized in that: The heating assembly further comprises a heat-conducting layer, and the heat-conducting layer is arranged between the heating layer and the heat-insulating layer.

11. A food warming plate, characterized in that: include: The heating assembly according to any one of claims 1 to 10; and, A control module is electrically connected to the heating component to control the heating component.

12. The vegetable warming plate according to claim 11, characterized in that: The warming plate also includes: A first protective layer, the first protective layer is arranged on a side of the heating component close to the heating layer; and / or, A second protective layer is arranged on a side of the heating component away from the heating layer.

13. The vegetable warming plate according to claim 11, characterized in that: The vegetable warming plate further comprises a protection frame, wherein the protection frame is provided with a receiving groove, and at least a part of the vegetable warming plate is received in the receiving groove.

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