Graphene high-temperature heating element

Abstract

The utility model discloses a graphene high-temperature heating element comprising a carrier which is internally provided with a sealing cavity; the graphene heating sheet is at least composed of a base material and a nanoscale graphene film, the graphene film is a continuous graphene film which is attached to the base material and has the nanoscale thickness, and the graphene film is located in the sealing cavity; and the electrode is electrically connected with the graphene film. The utility model provides a graphene high-temperature heating element which can meet the heating requirement of more than 100 DEG C, especially the temperature of more than 300 DEG C, in a surface heating mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of graphene heating equipment, specifically is a graphene high temperature heating element. BACKGROUND

[0002] The traditional heater generally adopts resistance wire, carbon fiber belt etc. as heating element. Since it can only realize filamentous or banded heating, it will lead to uneven heating, and local high temperature will also affect the service life of the heating element.

[0003] With the development of graphene technology, it starts to be gradually applied to the heating field for replacing the traditional filamentous or banded heating element heater due to its excellent electric heating performance (high thermal efficiency, fast thermal response speed, and far infrared wavelength) and surface heating characteristics.

[0004] However, the existing graphene heater generally adopts thick film paste coating process, which is to coat the paste containing graphene powder on the substrate and solidify to make a graphene heating element. Such graphene heater is generally applied to slightly higher room temperature heating scene, such as thermal clothing, electric blanket and other products. If the graphene heater is applied to high temperature heating scene, it is easy to fall off and fail, and the high temperature generally refers to more than 100 DEG C, especially more than 300 DEG C; in addition, due to the thick graphene heating layer formed after the graphene paste is coated, the opaque thick film structure will cause the far infrared wave generated in the graphene heating process to be difficult to pass through, thereby affecting the radiation heating efficiency.

[0005] Therefore, how to explore the application of graphene heating technology in high temperature scene has become a technical problem to be solved in the field.

[0006] Inorganic fiber (English original name: Inorganic Fiber) is a chemical fiber made of mineral and coke as raw material, which is an inorganic non-metallic insulating material with excellent performance. Inorganic fiber has excellent insulation, excellent microwave transmittance and corrosion resistance, high heat resistance and excellent mechanical strength. Inorganic fiber is generally made of silica stone and coke as raw material through high temperature melting, wire drawing and weaving process. Main varieties include glass fiber, quartz glass fiber, boron fiber and ceramic fiber.

[0007] Graphene (Graghene) is a two-dimensional single atomic layer carbon element film material formed by SP 2 Hybrid link of carbon atoms in a hexagonal honeycomb arrangement. Utility model content

[0008] The utility model aims at at least in the related technical problem of one of the one: provide a kind of graphene high temperature heating element, it can be with the way of surface heating to realize the heating demand of more than 100 ℃.

[0009] To this end, one purpose of the utility model is to provide a kind of graphene high temperature heating element, including carrier, inside having sealed cavity;Graphene heating sheet, at least by substrate and nanometer graphene film composition, wherein the graphene film is the nanometer thickness continuous graphene film attached on substrate, and the graphene film is located in sealed cavity;Electrode, with graphene film electric connection.

[0010] By the existing graphene growth process on substrate growth obtains graphene heating sheet with nanometer graphene film, and the graphene heating sheet is placed in the sealed cavity of carrier, so that graphene heating sheet can be heated in the way of surface heating after electrification, while located in the sealed cavity of the graphene heating sheet, so that the graphene heating sheet can be isolated from external oxygen, so that the graphene heating sheet can be heated continuously at more than 100 ℃, meet such high temperature heating demand.

[0011] According to an example of the utility model, the carrier includes base and transparent sealing cover, the sealing cover is combined with the base to form sealed cavity, the graphene heating sheet is placed in the sealed cavity, and the electrode on the graphene heating sheet is electrically connected with the wiring terminal on the base. Graphene heating sheet is placed in the sealed cavity, and the sealing cover is transparent, so that graphene heating sheet can be heated by infrared radiation.

[0012] Preferably, the side of the graphene film away from the substrate is provided with an infrared transmission layer.

[0013] Preferably, the substrate is made of transparent material, and the back of the substrate away from the graphene film is provided with an infrared reflection layer. The infrared rays on the back of the graphene film can be reflected back to the front by the infrared reflection layer, thereby improving the heating efficiency of the single side when heating the object by the single side of the graphene heating sheet.

[0014] Preferably, the back of the infrared reflection layer away from the substrate is provided with a thermal insulation layer.

[0015] Preferably, the substrate is in a sheet structure, and both sides of the substrate are provided with nanometer graphene film. Both sides of the substrate are provided with graphene film, so that infrared radiation heating can be provided on both sides simultaneously.

[0016] Preferably, the sealing cover is in a cylindrical structure, and the substrate is a flexible fiber cloth, which is curled into a cylindrical structure matching the sealing cover. The graphene heating sheet curled into a cylindrical structure can have a larger heating area, and the arc surface structure enables the graphene heating sheet to provide heating demand in all circumferential directions simultaneously.

[0017] Preferably, the substrate is a transparent and flexible fiber cloth, the inner side of the substrate is provided with an infrared reflection layer, and the outer side of the substrate is provided with an infrared transmission layer. The infrared reflection layer on the inner side of the substrate can reflect the infrared rays of the graphene film inward outward, so that the heating efficiency outward is higher.

[0018] According to an example of the utility model, the carrier includes a bottom shell, the top surface of the bottom shell has a groove, the substrate is covered on the groove opening and surrounded by the groove inner wall to form a sealed cavity, and the front surface of the substrate with the graphene film is located in the sealed cavity. The substrate in the graphene heating sheet is used as a cover plate to cover the groove opening, so that the graphene heating sheet is surrounded by the groove to form an internal sealed cavity, and the graphene film in the graphene heating sheet is located at the lower end surface of the substrate, thereby not only providing a closed space required for the graphene heating sheet to heat and playing a role of isolating oxygen, but also not needing to additionally set a cover plate, and an article placed above the substrate can be heated by a direct contact heat conduction mode.

[0019] Preferably, the substrate is made of a transparent material, the lower end surface of the graphene film is provided with an infrared reflection layer, and the lower end surface of the infrared reflection layer is provided with a heat insulation layer. The substrate is set to be transparent, so that the article placed above the substrate can not only obtain heat by heat conduction, but also can be heated by heat radiation after the infrared rays generated by the graphene film are reflected upward by the infrared reflection layer and then pass through the transparent substrate, thereby improving the overall heating efficiency of the article.

[0020] Preferably, the electrode includes an electrode strip and a conductive pin in the sealed cavity, the electrode strip is electrically connected with the graphene film, one end of the conductive pin is connected with the electrode strip, and the other end of the conductive pin extends to the outside of the bottom shell.

[0021] According to an example of the utility model, the carrier includes a circular-arc-shaped shell, the inside of the shell has a circular-arc-shaped sealed cavity, and the graphene heating sheet is located in the sealed cavity and is set to a circular-arc-shaped structure matched with the sealed cavity. The shell is set to be circular-arc-shaped, so that a central channel is formed in the shell, the graphene heating sheet is in a circular-arc-shaped structure surrounding the central channel when an article to be heated is placed in the central channel, and therefore the article can be heated in a circumferential direction, so that the temperature uniformity during the surface heating of the article is good.

[0022] The technical scheme has the following advantages or beneficial effects: firstly, the graphene film is grown on the substrate by using a graphene growth process, so that the graphene heating sheet formed by the graphene film can meet the demand of high-temperature surface heating, and the graphene film in the graphene heating sheet is isolated from the external oxygen in the sealed cavity of the carrier, so that the graphene film is not easy to be oxidized and damaged in the process of high-temperature heating, and the service life is improved; secondly, the infrared transmission layer is arranged on one side of the sheet-shaped graphene heating sheet, and the infrared reflection layer is arranged on the other side, so that the infrared rays on both sides of the graphene film can be reflected to the same side, and the heating efficiency of the infrared thermal radiation is improved in the process of single-side heating; thirdly, the flexible fiber cloth is used as the substrate, so that the entire graphene heating sheet can be made into an arc-shaped structure, which can provide the infrared thermal radiation heating uniformly in the circumferential direction, and when the carrier is arranged as a circular-arc shell structure, the object to be heated can be arranged in the central channel of the shell, the arc-shaped graphene heating sheet can heat the entire outer surface of the object to be heated from the circumferential direction of the object to be heated, the temperature uniformity of the overall heating process is good, and the area of the object to be heated by the infrared radiation is large, so that the heating efficiency is high.

[0023] Additional aspects and advantages of the present application will be described in the following description, some of which will become apparent after a review of the following description. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structure schematic view of the graphene heating sheet of the present application.

[0025] Figure 2 is a structure schematic view of the first graphene high-temperature heating element of the present application.

[0026] Figure 3 is Figure 2 is an internal structure schematic view of the graphene high-temperature heating element.

[0027] Figure 4 is Figure 2 is a disassembly schematic view of the graphene high-temperature heating element.

[0028] Figure 5 is a structure schematic view of the second graphene high-temperature heating element of the present application.

[0029] Figure 6 is Figure 5 is a disassembly schematic view of the graphene high-temperature heating element.

[0030] Figure 7 is a structure schematic view of the third graphene high-temperature heating element of the present application.

[0031] Figure 8 is Figure 7A disassembled schematic view of the middle graphene high-temperature heating element.

[0032] Figure 9 For Figure 7 A top view schematic view of the middle graphene high-temperature heating element.

[0033] Figure 10 For Figure 7 A bottom view schematic view of the middle graphene high-temperature heating element.

[0034] Figure 11 For Figure 10 A sectional view schematic view in the direction of "A-A".

[0035] Figure 12 A structure schematic view of the fourth graphene high-temperature heating element of the utility model.

[0036] Figure 13 For Figure 12 A front view schematic view of the middle graphene high-temperature heating element.

[0037] Wherein, 1, graphene heating sheet;1.1, base material;1.2, graphene film;1.3, infrared transmission layer;1.4, infrared reflection layer;1.5, heat insulation layer;2, base;3, sealing cover;4, wiring end;5, bottom shell;6, recess;7, electrode strip;8, conductive pin;9, shell;9.1, central passage. DETAILED DESCRIPTION

[0038] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0039] The graphene high-temperature heating element according to the embodiments of the utility model is described in detail below with reference to the drawings.

[0040] Embodiment one

[0041] The utility model provides a graphene high-temperature heating element, as shown in the figure, comprising

[0042] Carrier, internally having sealed cavity;

[0043] Graphene heating sheet 1, at least by base material 1.1 and nanometer graphene film 1.2 are composed, wherein the graphene film 1.2 is nanometer thickness continuous graphene film 1.2 attached on base material 1.1, and the graphene film 1.2 is located in the sealed cavity;

[0044] An electrode is electrically connected to the graphene film 1.2 at one end and extends to outside the carrier and can be electrically connected to an external power source to provide the electrical energy required for the graphene heating sheet 1 to heat.

[0045] The continuous graphene film with nanoscale thickness mentioned above refers to a continuous single-layer or multi-layer graphene film layer formed on the surface of the substrate 1.1 by chemical vapor deposition, epitaxial growth, scanning electromagnetic induction ultrafast growth, etc. The thickness of the continuous graphene film is between a few nanometers and a few tens of nanometers. Since the graphene is formed in a growth manner, the layered graphene film 1.2 formed on the substrate is continuous, so it is called a continuous graphene film with nanoscale thickness 1.2. Preferably, the preparation method disclosed in CN113840801A is used to form a nanoscale graphene film 1.2 on the surface of the substrate 1.1. The nanoscale graphene film 1.2 is different from the graphene slurry layer formed by the existing thick film coating process. The graphene slurry layer is usually millimeter thick, and since the graphene slurry layer is formed by mixing graphene powder with a solvent to form a slurry, and then coating the slurry on the substrate, although the graphene slurry layer is also a layered structure, its thickness is relatively thick and not continuous.

[0046] Preferably, the sealed cavity is filled with a protective gas, specifically an inert gas such as nitrogen.

[0047] Example Two

[0048] Based on the preferred improvement of the above-mentioned Example One: as shown in Figures 2-4 The carrier includes a base 2 and a transparent sealed cover 3, which is a cylindrical structure. The upper end of the sealed cover is sealed, and the lower end has an opening connected to the base 2. The graphene heating sheet 1 is located above the base 2. The opening of the sealed cover 3 is located above the graphene heating sheet 1 and encloses the graphene heating sheet 1 with the base 2 to form a closed sealed cavity. The graphene heating sheet 1 is located in the sealed cavity. The graphene heating sheet 1 has two electrodes, which are electrically connected to the wiring terminals 4 on the base 2. The wiring terminals 4 are used to be electrically connected to an external power source to supply the electrical energy required for the graphene heating sheet 1 to heat.

[0049] The sealed cavity is a vacuum cavity, or the sealed cavity is filled with a protective gas, specifically an inert gas such as nitrogen.

[0050] In this embodiment, the graphene heating element 1 is located inside a sealed cavity, and its external heating method is mainly far-infrared thermal radiation. To improve the heating efficiency of the sheet-like graphene heating element 1 on one side, this embodiment improves upon the following: the graphene film 1.2 is located on the front side of the substrate 1.1, with the front side of the substrate 1.1 facing the area to be heated, and an infrared transmitting layer 1.3 is provided on the side of the graphene film 1.2 facing away from the substrate 1.1. The infrared transmitting layer 1.3 helps to effectively radiate the infrared rays generated by the graphene film 1.2, allowing the infrared rays to pass smoothly through the heating source and improving heating efficiency. The material of the infrared transmitting layer 1.3 includes, but is not limited to, quartz, zinc sulfide, zinc selenide, silicon, germanium, magnesium fluoride, calcium fluoride, barium fluoride, potassium bromide, and sapphire.

[0051] Preferably, the substrate 1.1 is made of a transparent material, and an infrared reflective layer 1.4 is provided on the back side of the substrate 1.1 opposite to the graphene film 1.2.

[0052] Specifically, the substrate 1.1 is made of glass.

[0053] Furthermore, a heat insulation layer 1.5 is provided on the back side of the infrared reflective layer 1.4 away from the substrate 1.1.

[0054] like Figure 1 As shown, the graphene heating element 1 includes a transparent sheet-like substrate 1.1 in the middle. The top surface of the substrate 1.1 is the front surface, and a graphene film 1.2 is disposed on the front surface of the substrate 1.1. An infrared transmitting layer 1.3 is disposed on the upper end surface of the graphene film 1.2. An infrared reflecting layer 1.4 is disposed on the back surface of the substrate 1.1, and a heat insulation layer 1.5 is disposed below the infrared reflecting layer 1.4. In this embodiment, the infrared reflecting layer 1.4 can reflect the infrared rays emitted by the graphene film 1.2 back, thereby concentrating the heat on the front surface of the graphene heating element 1 and improving the heating efficiency.

[0055] Based on the improvements of the above embodiments, the graphene heating sheet 1 can also be composed of an infrared transmitting layer 1.3, a substrate 1.1, a graphene film 1.2, an infrared reflecting layer 1.4, and a heat insulation layer 1.5 stacked sequentially from bottom to top. In this case, the infrared transmitting layer 1.3 is located on the back side of the substrate 1.1, and the heat generated by the graphene film 1.2 passes through the transparent substrate 1.1 and faces the area on the back side of the substrate 1.1.

[0056] The above embodiments are all applied to the single-sided heating use scenario of graphene heating sheet 1. When double-sided heating is required, the graphene heating sheet 1 in this embodiment includes a sheet-shaped and transparent substrate 1.1. The front surface of the substrate 1.1 is provided with a graphene film 1.2. The side of the graphene film 1.2 away from the substrate 1.1 and the back surface of the substrate 1.1 are both provided with an infrared transmission layer 1.3. In this way, two-sided simultaneous heating can be achieved. Further, the front surface and the back surface of the substrate 1.1 are both provided with graphene films 1.2. The sides of the two graphene films 1.2 away from the substrate 1.1 are both provided with infrared transmission layers 1.3. In this embodiment, the graphene film 1.2 is a nanoscale graphene film 1.2 grown on the substrate by using the existing graphene growth process.

[0057] Embodiment Three

[0058] Based on the improvement of the above embodiment one: as shown in Figure 5 and Figure 6 The carrier includes a base 2 and a transparent sealing cover 3. The sealing cover 3 is a cylindrical structure. The upper end of the sealing cover is sealed, and the lower end has an opening connected to the base 2. The graphene heating sheet 1 is located above the base 2. The substrate 1.1 in the graphene heating sheet 1 is a flexible fiber cloth. The substrate 1.1 is curled into a cylindrical structure matching the sealing cover 3, so that the graphene heating sheet 1 composed of the substrate 1.1 and the nanoscale graphene film 1.2 grown on the substrate 1.1 is in a cylindrical structure. The opening position of the sealing cover 3 is from top to bottom covering the graphene heating sheet 1 outside and forming a closed sealed cavity with the base 2. The graphene heating sheet 1 is located in the sealed cavity. The graphene heating sheet 1 has two electrodes, positive and negative. The two electrodes are electrically connected to the wiring terminal 4 on the base 2. The wiring terminal 4 is used for electrical connection with an external power supply, thereby supplying the graphene heating sheet 1 with the required electrical energy for heating.

[0059] The sealed cavity is a vacuum cavity, or the sealed cavity is filled with a protective gas. Specifically, the protective gas is an inert gas, such as nitrogen.

[0060] In this embodiment, the graphene heating sheet 1 is located in the sealed cavity. Its external heating mode is mainly in the form of far infrared heat radiation. In order to improve the heating efficiency of the single side, the improvement of this embodiment is that the graphene film 1.2 is located on the outer side of the substrate 1.1. The side of the graphene film 1.2 away from the outer side of the substrate 1.1 is provided with an infrared transmission layer 1.3. The infrared transmission layer 1.3 helps to effectively radiate the infrared generated by the graphene film 1.2, so that the infrared can smoothly penetrate from the heating source, thereby improving the heating efficiency. The material of the infrared transmission layer 1.3 includes but is not limited to quartz, zinc sulfide, zinc selenide, silicon, germanium, magnesium fluoride, calcium fluoride, barium fluoride, potassium bromide, sapphire.

[0061] Preferably, the substrate 1.1 is made of a transparent material, and an infrared reflective layer 1.4 is provided on the back side of the substrate 1.1 opposite to the graphene film 1.2.

[0062] Specifically, the substrate 1.1 is made of glass.

[0063] Furthermore, the infrared reflective layer 1.4 has a heat insulation layer 1.5 on its inner side facing away from the substrate 1.1.

[0064] In this embodiment, the graphene heating element 1 includes a transparent and arc-shaped substrate 1.1. The outer side of the substrate 1.1 is the front side. A graphene film 1.2 is disposed on the front side of the substrate 1.1. An infrared transmitting layer 1.3 is disposed on the outer side of the graphene film 1.2. An infrared reflecting layer 1.4 is disposed on the inner side of the substrate 1.1. A heat insulation layer 1.5 is disposed on the inner side of the infrared reflecting layer 1.4. In this embodiment, the infrared reflecting layer 1.4 can reflect the infrared rays emitted by the graphene film 1.2 back, thereby concentrating heat on the front side of the graphene heating element 1 and improving heating efficiency.

[0065] Based on the improvements of the above embodiments, the graphene heating sheet 1 can also be composed of an infrared transmitting layer 1.3, a substrate 1.1, a graphene film 1.2, an infrared reflecting layer 1.4, and a heat insulation layer 1.5, which are sequentially stacked from the outside to the inside. In this case, the infrared transmitting layer 1.3 is located on the outer side of the substrate 1.1, while the graphene film 1.2 is located on the inner side of the substrate 1.1. The heat generated by the graphene film 1.2 passes through the transparent substrate 1.1 and faces the area on the back side of the substrate 1.1.

[0066] Example 4

[0067] like Figures 7-11 As shown, the carrier includes a square base shell 5 with a groove 6 on its top surface. The length and width dimensions of the substrate 1.1 in the graphene heating element 1 are set to match the opening of the groove 6, so that the substrate 1.1 can cover the opening of the groove 6 and form a sealed cavity with the inner wall of the groove 6. The front side of the substrate 1.1 faces down, so that the graphene film 1.2 on the front side of the substrate 1.1 is located in the sealed cavity. In this embodiment, the item to be heated can be placed directly on the upper surface of the substrate 1.1, and the heat generated by the graphene film 1.2 can heat the item above the substrate 1.1 through heat conduction.

[0068] Specifically, the gap between the outer wall of the substrate 1.1 and the inner wall of the groove 6 in the graphene heating element 1 is sealed by a vacuum fiber welding process.

[0069] The sealed cavity is a vacuum cavity, or the sealed cavity is filled with a protective gas, specifically an inert gas, such as nitrogen.

[0070] Preferably, as shown in Figure 11 The electrode includes an electrode strip 7 arranged in the sealed cavity and electrically connected with the graphene film 1.2, and a conductive lead pin 8, one end of which is connected with the electrode strip 7 and the other end of which extends out of the bottom shell 5, the bottom shell 5 has a through hole for the one end of the conductive lead pin 8 to extend out of the bottom shell 5, and the conductive lead pin 8 is sealed with the through hole to ensure the air tightness of the sealed cavity. The conductive lead pin 8 can be electrically connected with an external power supply to provide the graphene film 1.2 with electric energy required for heating.

[0071] Based on the above preferred embodiment, the substrate 1.1 is made of transparent material, the lower end surface of the graphene film 1.2 is provided with an infrared reflecting layer 1.4, and the lower end surface of the infrared reflecting layer 1.4 is provided with a heat insulation layer 1.5. The infrared rays generated by the graphene heating sheet 1 after being electrified can be reflected by the infrared reflecting layer 1.4 and then pass through the transparent substrate 1.1 to act on the object to be heated. At this time, the graphene heating sheet 1 not only heats the object to be heated through direct contact heat conduction, but also further heats the object to be heated in the form of infrared radiation heating, thereby improving the heating efficiency.

[0072] Specifically, the substrate 1.1 is made of glass material.

[0073] It should be understood that in the present embodiment, the substrate 1.1 in the graphene heating sheet 1 cooperates with the groove 6 to form a sealed cavity, so that the overall structure is simpler, and the object directly contacts the substrate 1.1, which has better heat conductivity. If the substrate 1.1 needs to be protected and the sealing performance needs to be improved, a cover plate can be additionally arranged on the substrate 1.1, which should be a routine improvement based on the present embodiment.

[0074] Embodiment Five

[0075] As shown in Figure 12 and Figure 13 The carrier includes a sheet-shaped shell 9, which is curved along the width direction to form a circular arc structure, so that the inner side of the shell 9 is curved to form a central passage 9.1, the inside of the shell 9 has a circular arc-shaped sealed cavity arranged around the central passage 9.1, and the graphene heating sheet 1 is located in the sealed cavity and is arranged in a circular arc structure matched with the sealed cavity. The electrode of the graphene heating sheet 1 is led out of the sealed cavity and is electrically connected with an external power supply.

[0076] In the present embodiment, the object to be heated can be placed in the central passage 9.1 along the axial direction, and the heat generated by the graphene heating sheet 1 with a circular arc structure can synchronously heat each position of the object to be heated in the circumferential direction, so that the object to be heated has good uniformity in heating the outer surface.

[0077] Preferably, the shell 9 is made of transparent material. The base material 1.1 in the graphene heating sheet 1 is a flexible fiber cloth. The soft fiber cloth can make the graphene heating sheet 1 bend into the required arc structure.

[0078] In order to improve the heating efficiency of the objects to be heated in the central channel 9.1 in the above embodiment, the improvement of the present embodiment is that the graphene film 1.2 is located on the inner side of the base material 1.1, and the infrared transmission layer 1.3 is provided on the inner side of the graphene film 1.2 away from the base material 1.1. The infrared transmission layer 1.3 helps to effectively radiate the infrared generated by the graphene film 1.2, so that the infrared can smoothly penetrate out from the heating source, improving the heating efficiency. The material of the infrared transmission layer 1.3 includes but is not limited to quartz, zinc sulfide, zinc selenide, silicon, germanium, magnesium fluoride, calcium fluoride, barium fluoride, potassium bromide, sapphire.

[0079] Further, the base material 1.1 is made of transparent material, and the outer side of the base material 1.1 away from the graphene film 1.2 is provided with an infrared reflection layer 1.4. Specifically, the base material 1.1 is made of glass. Further, the outer side of the infrared reflection layer 1.4 away from the base material 1.1 is provided with a heat insulation layer 1.5. In the present embodiment, the graphene heating sheet 1 includes a transparent and arc-shaped base material 1.1, the inner side of the base material 1.1 is the front surface, the front surface of the base material 1.1 is provided with the graphene film 1.2, the inner side of the graphene film 1.2 is provided with the infrared transmission layer 1.3, the outer side of the base material 1.1 is provided with the infrared reflection layer 1.4, and the outer side of the infrared reflection layer 1.4 is provided with the heat insulation layer 1.5. The infrared reflection layer 1.4 can reflect the infrared emitted by the graphene film 1.2 back, so that the heat is concentrated on the front surface of the graphene heating sheet 1, that is, the reflected infrared can be directed towards the central channel 9.1, improving the heating efficiency of the objects to be heated in the central channel 9.1.

[0080] Similarly, the graphene heating sheet 1 can also be sequentially stacked from the inside out with the infrared transmission layer 1.3, the base material 1.1, the graphene film 1.2, the infrared reflection layer 1.4 and the heat insulation layer 1.5, at this time the infrared transmission layer 1.3 is located on the inner side of the base material 1.1 and the graphene film 1.2 is located on the outer side of the base material 1.1, the heat generated by the graphene film 1.2 is radiated in the form of infrared to heat the space in the central channel 9.1 after penetrating through the transparent base material 1.1 and the infrared transmission layer 1.3.

[0081] Further, the sealed cavity is a vacuum cavity, or the sealed cavity is filled with a protective gas, specifically an inert gas such as nitrogen.

[0082] The fiber cloth in the above embodiment includes but is not limited to various glass fibers, quartz fibers, ceramic fibers.

[0083] It should be noted that in the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0084] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0085] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. 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.

[0086] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0087] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and modified by those skilled in the art without contradiction, if possible.

[0088] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

[0089] For those skilled in the art, after reading the above description, various changes and modifications will undoubtedly be apparent. Therefore, the appended claims should be considered as covering all changes and modifications within the true intent and scope of the present application. Any and all equivalent ranges and contents within the scope of the claims should be considered as still within the intent and scope of the present application.

Claims

1. A graphene high temperature heating element characterised in that: The utility model provides a graphene heating sheet and a carrier thereof The utility model provides a graphene heating sheet and a carrier thereof The graphene heating sheet comprises a substrate (1.1) and a graphene film (1.2) attached to the substrate (1.1), and the graphene film (1.2) is located in the sealed cavity. The graphene heating sheet further comprises an electrode electrically connected to the graphene film (1.2).

2. A graphene high temperature heating element according to claim 1 characterised in that: The carrier comprises a base (2) and a transparent sealing cover (3) which forms a sealed cavity together with the base (2), and the graphene heating sheet (1) is located in the sealed cavity and the electrode of the graphene heating sheet (1) is electrically connected to a terminal (4) on the base (2).

3. A graphene high temperature heating element according to claim 2, characterised in that: The graphene film (1.2) is provided with an infrared transmission layer (1.3) on the side away from the substrate (1.1).

4. A graphene high temperature heating element according to claim 3, characterised in that: The substrate (1.1) is made of transparent material, and the back of the substrate (1.1) away from the graphene film (1.2) is provided with an infrared reflection layer (1.4).

5. A graphene high temperature heating element according to claim 4, characterised in that: The back of the infrared reflection layer (1.4) away from the substrate (1.1) is provided with a thermal insulation layer (1.5).

6. The graphene high temperature heating element according to any one of claims 1-3, wherein: The substrate (1.1) is in a sheet structure, and the graphene film (1.2) is provided on both sides of the substrate (1.1) in nanoscale.

7. The graphene high temperature heating element of claim 2, wherein: The sealing cover (3) is in a cylindrical structure, and the substrate (1.1) is a flexible fiber cloth which is curled into a cylindrical structure matching the sealing cover (3).

8. The graphene high temperature heating element according to claim 7, characterized in that: The substrate (1.1) is a transparent and flexible fiber cloth, and the inner side of the substrate (1.1) is provided with an infrared reflection layer (1.4) and the outer side is provided with an infrared transmission layer (1.3).

9. The graphene high temperature heating element of claim 1, wherein: The carrier comprises a bottom shell (5) which has a groove (6) on the top surface, and the substrate (1.1) is covered on the groove (6) and forms a sealed cavity together with the inner wall of the groove (6), and the front side of the substrate (1.1) with the graphene film (1.2) is located in the sealed cavity.

10. A graphene high temperature heating element according to claim 9, characterised in that: The substrate (1.1) is made of transparent material, and the lower end surface of the graphene film (1.2) is provided with an infrared reflection layer (1.4), and the lower end surface of the infrared reflection layer (1.4) is provided with a thermal insulation layer (1.5).

11. The graphene high temperature heating element of claim 9, wherein: The electrode comprises an electrode strip (7) located in the sealed cavity and an electrically conductive lead pin (8), the electrode strip (7) is electrically connected to the graphene film (1.2), one end of the electrically conductive lead pin (8) is connected to the electrode strip (7), and the other end extends out of the bottom shell (5).

12. The graphene high temperature heating element of claim 1, wherein: The carrier comprises a circular-arc shell (9) which has a circular-arc sealed cavity in the interior, and the graphene heating sheet (1) is located in the sealed cavity and is in a circular-arc structure matching the sealed cavity.

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