Graphene heating structure, graphene heating module and heating equipment

Abstract

The utility model provides a graphene heating structure, a graphene heating module and heating equipment, and belongs to the technical field of graphene. The graphene heating structure comprises two insulating heat-conducting layers which are oppositely arranged and a graphene heating layer which is clamped between the two insulating heat-conducting layers; wherein the insulating heat conduction layer at least comprises a metal sheet of which the surface is subjected to anodic oxidation treatment, and the graphene heating layer comprises a graphene heating sheet or a plurality of stacked graphene heating sheets. According to the embodiment of the utility model, the graphene heating layer is clamped between the two insulating heat-conducting layers, and the insulating heat-conducting layers are made of aluminum sheets or copper sheets, so that the graphene heating plate has better insulating heat-conducting performance, and can meet the requirements of thickness and rigidity at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of graphene, and in particular to a graphene heating structure, a graphene heating module and a heating device. Background Art

[0002] Graphene heating principle: Under the action of the electric field, the carbon atom groups in the heating body undergo "Brownian motion", and violent friction and collision occur between the carbon atoms. The generated heat energy is transmitted to the outside in the form of far-infrared radiation, and the conversion rate of electrical energy to thermal energy is as high as over 99%.

[0003] At present, the common forms of graphene heating on the market are PE film packaging, high boron glass, ceramics, mica sheets, microcrystalline plates, etc. For the above packaging methods:

[0004] Although graphene heating films encapsulated by PE or PP films can be made ultra-thin, they cannot be used as high-temperature devices due to the temperature limit of the encapsulation material itself, and they are flexible materials and cannot be used as modules or components.

[0005] High boron glass is a rigid package, but the thermal conductivity of the package material itself is poor, and the thickness cannot be made thinner. The package itself is not suitable for making modules and fixing;

[0006] The graphene heating film encapsulated by mica sheets can be made thinner, but there is a risk of mica sheets falling off at high temperatures, and there are certain problems with stability and reliability. In addition, mica has an odor at high temperatures, which provides a poor user experience.

[0007] The packaging form of microcrystalline panels is similar to that of high-boron glass, which cannot be made ultra-thin and has certain limitations in installation and fixation;

[0008] For application scenarios that require both a rigid structure and ultra-thin thickness with high requirements for temperature uniformity and absolute values, the current graphene heating method cannot take both into account. Utility Model Content

[0009] In order to overcome the problem that the existing graphene heating cannot meet the rigidity requirements, ultra-thin thickness and uniform heating at the same time, the embodiment of the utility model proposes a graphene heating structure, a graphene heating module and a heating device. In the embodiment of the utility model, the graphene heating layer is sandwiched between two insulating thermal conductive layers, and the insulating thermal conductive layers are aluminum sheets or copper sheets, which have good insulating thermal conductivity and can take into account the requirements of thickness and rigidity.

[0010] Embodiment 1 of the present utility model proposes a graphene heating structure, which includes:

[0011] Two insulating heat-conducting layers arranged opposite to each other and a graphene heating layer sandwiched between the two insulating heat-conducting layers;

[0012] The insulating heat-conducting layer at least comprises a metal sheet whose surface has been anodized, and the graphene heating layer comprises one graphene heating sheet or a plurality of stacked graphene heating sheets.

[0013] In the above technical solution, the insulating heat-conducting layer is an aluminum sheet and / or a copper sheet at least part of which is anodized, and the aluminum sheet and / or the copper sheet each include a first surface for sandwiching the graphene heating layer, a second surface opposite to the first surface, and an outer peripheral surface surrounded between the first surface and the second surface;

[0014] The aluminum sheet and / or the copper sheet is anodized on the first and second surfaces, and at least a portion of the outer peripheral surface is not anodized;

[0015] The aluminum sheet and / or copper sheet used to sandwich the graphene heating layer is welded or bonded to the non-anodized parts on the outer peripheral surface to sandwich and fix the graphene heating layer.

[0016] In the above technical solution, the insulating heat-conducting layer includes a stacked insulating layer and a heat-conducting layer, and the insulating layer is attached to the graphene heating layer;

[0017] The insulating layer comprises a film structure made of polyimide, and the heat conducting layer is an aluminum sheet and / or copper.

[0018] In the above technical solution, the graphene heating sheet has a serpentine shape in the length direction of the graphene heating layer, and the graphene heating layer is arranged as a multi-layer graphene heating sheet.

[0019] In the above technical solution, the serpentine shape of the graphene heating sheet forms a plurality of bending regions, and the insulating heat-conducting layer is provided with notches corresponding to at least part of the bending regions;

[0020] The insulating heat-conducting layer includes long sides that are arranged opposite to each other and short sides that are between the two long sides and are arranged opposite to each other, and the notches include long side notches formed on the long sides and short side notches formed on the short sides;

[0021] The relatively long sides of the insulating thermal conductive layer include a first long side and a second long side, each of which is provided with at least one long side notch, and the first long side notch on the first long side and the long side notch on the second long side are alternately distributed in the length direction of the insulating thermal conductive layer.

[0022] In the above technical solution, the graphene heating layer is formed by stacking 8 to 15 single-sheet graphene heating sheets with a thickness of 10 μm to 50 μm.

[0023] In the above technical solution, the graphene heating structure also includes:

[0024] An electrode sheet, a part of which is sandwiched between two insulating heat-conducting layers to connect to the graphene heating layer, and another part of which is located outside the two insulating heat-conducting layers to connect to a power source;

[0025] The electrode sheet is made of copper or conductive cloth, and is welded or riveted to one end and / or both ends of the graphene heating layer in the length direction.

[0026] In the above technical solution, the graphene heating structure also includes:

[0027] The temperature sensor is embedded in the graphene heating layer or placed outside the insulating heat-conducting layer.

[0028] In the above technical solution, the graphene heating structure is a plate-like structure that is an elongated strip as a whole, wherein the thickness of the metal sheet that serves as at least a part of the graphene heating structure satisfies 1 mm to 1.5 mm.

[0029] Embodiment 2 of the present invention further provides a graphene heating structure, which differs from Embodiment 1 in that: the insulating heat-conducting layer comprises a stacked insulating layer and a heat-conducting layer;

[0030] The insulating layer is bonded to the graphene heating layer.

[0031] In the above technical solution, the insulating layer includes a film structure made of polyimide, and the heat-conducting layer is an aluminum sheet and / or a copper sheet.

[0032] Embodiment 3 of the present utility model proposes a graphene heating module, which includes a plurality of stacked graphene heating structures, wherein the graphene heating structure is the above-mentioned graphene heating structure.

[0033] In the above technical solution, two adjacent graphene heating structures are arranged at a distance in the stacking direction to form an air flow channel for air flow.

[0034] In the above technical solution, the graphene heating module also includes a limiting frame and a fixing frame;

[0035] The limiting framework is embedded in the long side notches of the plurality of graphene heating structures, so that two adjacent graphene heating structures are spaced apart in the length direction of the graphene heating structures;

[0036] The fixing frame is embedded in the short side notches of the plurality of graphene heating structures to fix the plurality of graphene heating structures in the width direction of the graphene heating structures.

[0037] Embodiment 4 of the present utility model proposes a heating device, which includes the above-mentioned graphene heating module, and the graphene heating module is constructed as a whole in a rectangular or circular or ring-shaped or U-shaped shape.

[0038] In the above technical solution, the heating device includes:

[0039] The fan has its air outlet directed toward the graphene heating module, so that the airflow driven by the fan can be heated by the graphene heating module and flow out through the airflow channel formed between two adjacent graphene heating structures in the graphene heating module.

[0040] In the above technical solution, the graphene heating module also includes:

[0041] The temperature controller is used to monitor the temperature of the graphene heating module and disconnect the electrical connection between the graphene heating module and the power supply when the temperature of the graphene heating module exceeds a preset temperature value.

[0042] In the above technical solution, the heating device is an air-heating type heating device.

[0043] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0044] In the embodiment of the utility model, the graphene heating layer is sandwiched between two insulating heat-conducting layers, and the insulating heat-conducting layers are aluminum sheets or copper sheets, which have good insulating and heat-conducting properties and can take into account the requirements of thickness and rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0046] Figure 1 This is a schematic diagram of the top view of the graphene heating structure embodiment 1 of the utility model;

[0047] Figure 2 This is a side view structural schematic diagram of the graphene heating structure embodiment 1 of the utility model;

[0048] Figure 3 This is a schematic diagram of the top view of the insulating heat-conducting layer in Example 1 of the graphene heating structure of the utility model;

[0049] Figure 4 This is a schematic diagram of the top view of the graphene heating layer in Example 1 of the graphene heating structure of the utility model;

[0050] Figure 5 It is a partial cross-sectional structural schematic diagram of Example 1 of the graphene heating structure of the utility model;

[0051] Figure 6 This is a schematic diagram of the explosion structure of Example 1 of the graphene heating structure of the utility model;

[0052] Figure 7 This is a schematic diagram of the explosion structure of Example 2 of the graphene heating structure of the utility model;

[0053] Figure 8 This is a structural schematic diagram of Example 3 of the graphene heating module of the utility model;

[0054] Fig. 9 This is a schematic diagram of the structure of Example 3 of the graphene heating module of the utility model.

[0055] Among them: 1-insulating heat-conducting layer; 1a-insulating layer; 1b-heat-conducting layer; 11-first surface; 12-second surface; 13-peripheral surface; 14-notch; 15-through hole; 100-long side; 200-short side; 2-graphene heating layer; 21-bending area; 3-graphene heating structure; 4-limiting skeleton; 5-fixed skeleton. DETAILED DESCRIPTION

[0056] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices and methods consistent with some aspects of the utility model as detailed in the attached claims.

[0057] Currently, the existing graphene heating cannot meet the requirements of rigidity, ultra-thin thickness and uniform heating at the same time. The embodiment of the utility model proposes a graphene heating structure, a graphene heating module and a heating device. In the embodiment of the utility model, the graphene heating layer is sandwiched between two insulating thermal conductive layers, and the insulating thermal conductive layers are aluminum sheets or copper sheets, which have good insulating thermal conductive properties and can take into account the requirements of thickness and rigidity.

[0058] The following is combined with Figure 1 -Attached Fig. 9 The technical solution of this embodiment is elaborated in detail. In the absence of conflict, the following implementation methods and embodiments can be combined with each other.

[0059] Example 1

[0060] like Figure 1-Figure 6 As shown, this embodiment proposes a graphene heating structure, and the graphene heating structure includes:

[0061] Two insulating heat-conducting layers 1 arranged opposite to each other and a graphene heating layer 2 sandwiched between the two insulating heat-conducting layers;

[0062] The insulating heat-conducting layer 1 at least comprises a metal sheet whose surface has been anodized, and the graphene heating layer 2 comprises one graphene heating sheet or a plurality of stacked graphene heating sheets.

[0063] In the embodiment of the utility model, the graphene heating layer 2 is sandwiched between two insulating heat-conducting layers 1, wherein the insulating heat-conducting layer 1 at least includes a metal sheet with an anodized surface, so that the graphene heating structure can have better insulating and thermally conductive properties while taking into account the requirements of thickness and rigidity.

[0064] Specifically, the insulating heat-conducting layer 1 is an aluminum sheet and / or a copper sheet at least part of which has been anodized.

[0065] In the embodiment of the utility model, the surface of the aluminum sheet and / or the copper sheet is anodized to meet the insulation and withstand voltage requirements of the graphene heating structure.

[0066] It is worth mentioning that the specific insulation voltage requirements can be calculated based on the product category and drug resistance requirements formula, such as basic insulation of household appliances: 1.2U+700, additional insulation: 1.2U+1450, reinforced insulation: 2.4U+2400. For example, for a 220V working voltage, to meet the basic insulation, a voltage resistance of 964V is required, and to meet the additional insulation, a voltage resistance of 1714V is required. To meet the reinforced insulation requirements, a voltage resistance of 2664V is required, and so on. The voltage resistance design is carried out according to the actual product requirements. For example, the thickness of the surface oxide layer of a factory's process aluminum is about 40μm, which can meet the voltage resistance of 1714V, that is, it meets the additional insulation requirements of household appliances.

[0067] Furthermore, the aluminum sheet and / or the copper sheet each includes a first surface 11 for sandwiching the graphene heating layer 2, a second surface 12 opposite to the first surface 11, and an outer peripheral surface 13 surrounded between the first surface 11 and the second surface 12;

[0068] The first surface 11 and the second surface 12 of the aluminum sheet and / or the copper sheet have been anodized, and at least a portion of the outer peripheral surface 13 of the aluminum sheet and / or the copper sheet has not been anodized;

[0069] The aluminum sheet and / or copper sheet used to sandwich the graphene heating layer 1 is welded or bonded to the portion of the outer peripheral surface 13 that has not been anodized, so as to sandwich and fix the graphene heating layer 2.

[0070] The thickness of the oxide film on the surface of the aluminum sheet and / or copper sheet must meet the voltage resistance test standard, and the two insulating heat-conducting layers 1 are preferably fixed by welding.

[0071] Preferably, the above-mentioned insulating heat-conducting layer is an aluminum sheet.

[0072] That is, the insulating heat-conducting layer 1 in the embodiment of the utility model is shielded when being oxidized. Take the insulating heat-conducting layer as an aluminum sheet as an example: when a single aluminum sheet is anodized, the edge of the aluminum sheet is first shielded with a tool so that the raw material of aluminum is retained at the edge sealing position, so that welding can be performed;

[0073] For further optimization, the large piece of aluminum material can be anodized first, and then processed by laser engraving, so that the aluminum body material is retained at the edge, and at least 1 mm of this material is retained at the joint edge. The edges of the two insulating thermal conductive layers 1 are welded together by ultrasonic welding, laser welding or other possible welding methods.

[0074] In any of the above-mentioned embodiments, the graphene heating sheet has a serpentine shape in the length direction of the graphene heating layer 2, and the graphene heating layer 2 is formed by stacking and arranging multiple layers of graphene heating sheets.

[0075] Furthermore, the serpentine shape of the graphene heating sheet forms a plurality of bending regions 21, and the insulating heat-conducting layer 1 is provided with notches 14 corresponding to at least part of the bending regions 21;

[0076] The insulating heat-conducting layer 1 includes long sides 100 disposed opposite to each other and short sides 200 disposed opposite to each other between the two long sides 100, and the notches 14 include long side notches formed on the long sides and short side notches formed on the short sides 200;

[0077] The long sides of the insulating heat-conducting layer 1 that are arranged opposite to each other include a first long side and a second long side, and at least one long side notch is arranged on each of the first long side and the second long side, and the first long side notch on the first long side and the long side notch on the second long side are staggered in the length direction of the insulating heat-conducting layer 1;

[0078] The insulating heat-conducting layer 1 is also provided with a plurality of through holes 15 .

[0079] In the embodiment of the utility model, in order to meet the power and temperature requirements of the graphene heating layer 1, the shape and length of the graphene heating sheet are designed. Preferably, the graphene heating sheet is arranged in a serpentine shape in the length direction. At the same time, in order to subsequently package multiple graphene heating structures into an integral graphene heating module, a notch 14 is opened on the insulating heat-conducting layer 1, so that the multiple graphene heating structures can be fixed into an integral graphene heating module through the limiting frame 4 and the fixing frame 5.

[0080] Furthermore, the graphene heating layer is composed of 8-15 single-piece graphene heating sheets with a thickness of 10μm-50μm. Preferably, the thickness of the graphene heating layer is set to 0.4nm. Further preferably, the graphene heating layer is a multi-layer graphene structure. The difference between the multi-layer graphene and the single-layer graphene structure is mainly in the thickness direction. Both are composed of a main graphene heating sheet, and the thickness of the graphene heating sheet is 40μm.

[0081] In any of the above embodiments, the graphene heating structure further comprises:

[0082] An electrode sheet {not shown in the figure}, a part of the electrode sheet is sandwiched between the two insulating heat-conducting layers to connect the graphene heating layer, and the other part is located outside the two insulating heat-conducting layers to connect to the power supply;

[0083] The electrode sheet is made of copper sheet or conductive cloth, and is welded or riveted to one end and / or both ends of the graphene heating layer 1 in the length direction.

[0084] It is worth noting that the electrode sheet in the embodiment of the utility model is a separate external structure for realizing the electrical connection between the graphene heating layer 1 and the power supply. The electrode sheet is partially encapsulated in the insulating thermal conductive layer 2 together with the graphene, and partially exposed outside the entire heating sheet for electrical connection with the power supply.

[0085] In any of the above embodiments, if Figure 1-Figure 6 As shown, the graphene heating structure is a plate-like structure that is an elongated strip as a whole, wherein the thickness of the metal sheet that serves as at least a part of the graphene heating structure satisfies 1 mm to 1.5 mm.

[0086] It is worth noting that when the thickness of the metal sheet is between 1mm and 1.5mm, the graphene heating structure can achieve a thinner thickness while meeting the structural strength requirements. At the same time, the thickness of 1mm-1.5mm can also meet the structural strength requirements while ensuring that the graphene heating structure has a certain flexibility, so that the graphene heating structure can be arranged into the required shape, such as circular, ring-shaped, etc. as needed.

[0087] Example 2

[0088] like Figure 7 As shown, the difference between this embodiment and embodiment 1 is that: in this embodiment, the insulating heat-conducting layer 1 includes a stacked insulating layer 1a and a heat-conducting layer 1b;

[0089] The insulating layer 1a is bonded to the graphene heating layer 2.

[0090] Preferably, the insulating layer 1a comprises a film structure made of polyimide, and the heat conducting layer 1b is an aluminum sheet and / or a copper sheet.

[0091] It is worth noting that the graphene heating structure provided in this embodiment is suitable for scenarios where the surface temperature of the graphene heating structure monomer is lower than 500°C. The graphene heating structure provided in this embodiment does not need to be specially insulated when packaging the insulating thermal conductive layer 1, which simplifies the process, but at the same time adds a separate insulating layer.

[0092] The insulating heat-conducting layer in Example 1 is an aluminum sheet with an anodized surface or a copper sheet with a calcined surface to ensure the insulation of the aluminum sheet and the copper sheet. This graphene heating structure is applicable to any temperature scenario and has a wider applicable temperature range.

[0093] Example 3

[0094] like Figure 8 and Fig. 9 As shown, a graphene heating module is provided in this embodiment, including a plurality of stacked graphene heating structures 3, wherein the graphene heating structure 3 is the graphene heating structure mentioned in Example 1 or Example 2.

[0095] Specifically, Figure 8 As shown, two adjacent graphene heating structures 3 are arranged at a distance in the stacking direction to form an air flow channel for air flow between the two adjacent graphene heating structures 3 .

[0096] More specifically, Fig. 9 As shown, the graphene heating module also includes a limiting frame 4 and a fixing frame 5;

[0097] The limiting frame 4 is embedded in the long side notches of the plurality of graphene heating structures 3, so that two adjacent graphene heating structures 3 are spaced apart in the length direction of the graphene heating structures 3, thereby preventing two adjacent graphene heating structures from being stacked together. Specifically, the distance between two adjacent graphene heating structures is equal, thereby achieving a uniform temperature effect of the entire graphene heating module;

[0098] The fixing frame 5 is embedded in the short side notches of the multiple graphene heating structures 3 to fix the multiple graphene heating structures 3 in the width direction of the graphene heating structures 3, thereby fixing the multiple graphene heating structures into a whole.

[0099] That is, the graphene heating module provided in the embodiment of the utility model uses the graphene heating sheet as the base material, and the required graphene heating structure 3 is packaged and fixed into a group through a fixed frame and a limiting frame. A fixed gap is retained between two adjacent graphene heating structures 3. The gap between the sheets and the power density of the single sheet are adjusted according to the corresponding flow rate, power consumption and temperature requirements to achieve the required power density and temperature distribution.

[0100] For example, the required wind speed of the hot air outlet is 5m / s, and the outlet temperature requirement is 120℃. The single-chip power can be designed to be 200W, and the gap between the chips is 3mm. A suitable fan can be matched to meet the wind speed and temperature requirements. Generally, the heating module of the utility model has much lower requirements for the fan speed and PQ than the PTC heating module, which can effectively reduce the fan parameter requirements by about 30%, and can meet the same wind speed and temperature requirements, reduce the noise impact of the product, the fan power and the heating power of the heater, and is environmentally friendly and comfortable.

[0101] It is worth noting that the graphene heating module is generally designed as a rectangular parallelepiped, but in view of the fact that the graphene heating membrane itself has both rigidity and certain flexibility, the heating module can be designed into a special shape to meet the needs of different product shapes. The general rectangular heating module is designed with a single wind direction, and the wind guide plate structure can be added to increase the hot air flow area. The conventional practice is to swing the wind at 120°.

[0102] Of course, in some alternative embodiments, the heating module can also be designed to be circular, annular, U-shaped and other different shapes, among which the running and annular shapes can realize 360° surround hot air discharge, and because the graphene heating module provided in the embodiment of the utility model has the characteristics of small flow resistance and heating block, it can deliver comfortable air in time and at multiple angles, achieving the effect of instant heating, uniformity and low noise of the heater.

[0103] Furthermore, the graphene heating module provided in this embodiment also adds a temperature controller and a fuse, which can effectively avoid safety hazards caused by excessive temperature in actual use, and at the same time, a temperature sensor is added at a suitable position to connect with an external intelligent control system to perform temperature controllable operation. The temperature of the body or the air outlet is detected by the temperature sensor, and the difference between the air outlet temperature and the standard test environment temperature is confirmed as compensation through test debugging, and the corresponding control relationship between the air outlet temperature and the fan and power consumption is set to monitor the indoor temperature in real time and perform stepless temperature adjustment.

[0104] It is worth noting that the graphene heating module provided in this embodiment can be used in air-heating devices such as desktop heating products, bathroom heaters, baseboard heaters, and tower heaters.

[0105] For example, after the graphene heating module in this embodiment is modularized, it can be made into a structure similar to the PTC module by referring to the current practice of air-heated bathroom heaters to replace the PTC heating module. Due to the excellent thermal conductivity of graphene itself, there is no need for an additional large-area heat dissipation structure like the PTC heating module, which can effectively reduce wind resistance and improve heating efficiency and heating uniformity.

[0106] Example 4

[0107] This embodiment provides a heating device, which includes the graphene heating module mentioned in Example 3, wherein the graphene heating module is constructed in a rectangular, circular or ring shape.

[0108] Specifically, the heating equipment includes:

[0109] The fan is configured such that air is discharged toward the graphene heating module.

[0110] The heating device with a graphene heating module provided in the embodiment of the utility model detects the outlet air temperature of the graphene heating module body through a temperature sensor, confirms the difference between the outlet air temperature and the standard test environment temperature through test debugging as compensation, sets the corresponding control relationship between the outlet air temperature and the fan and power consumption, monitors the indoor temperature in real time and performs stepless temperature adjustment.

[0111] In any of the above embodiments, the heating device further comprises:

[0112] The temperature sensor is embedded in the graphene heating layer 2 or placed outside the insulating heat-conducting layer 1.

[0113] In the embodiment of the utility model, a temperature sensor is embedded in the graphene heating layer 2 or a temperature sensor is added to the insulating heat-conducting layer body, and connected to an external intelligent control system to perform temperature control operation. For example, a temperature sensor is added to a suitable position of the body, and the corresponding relationship between the body temperature and the corresponding distance temperature is confirmed through test debugging, and the temperature control relationship is set.

[0114] It is worth noting that the heating device mentioned above in this embodiment is preferably an air-heating heating device.

[0115] Specifically, the heating equipment in this embodiment can be a desktop heating product, a bathroom heater, a baseboard heater, a tower heater, or other wind-heating heating device.

[0116] After considering the specification and practicing the embodiments disclosed herein, those skilled in the art will easily think of other embodiments of the utility model. This application is intended to cover any variation, use or adaptation of the utility model, which follows the general principles of the utility model and includes common knowledge or customary technical means in the technical field not disclosed in the utility model. The description and examples are to be regarded as exemplary only, and the true scope and spirit of the utility model are indicated by the following claims.

[0117] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A graphene heating structure, characterized in that: The graphene heating structure comprises: Two insulating heat-conducting layers (1) arranged opposite to each other and a graphene heating layer (2) sandwiched between the two insulating heat-conducting layers; The insulating heat-conducting layer (1) at least comprises a metal sheet whose surface has been anodized, and the graphene heating layer (2) comprises a graphene heating sheet or a plurality of stacked graphene heating sheets.

2. The graphene heating structure according to claim 1, characterized in that: The insulating heat-conducting layer (1) is an aluminum sheet and / or a copper sheet at least part of whose surface has been anodized; The aluminum sheet and / or copper sheet each comprises a first surface (11) for sandwiching the graphene heating layer (2), a second surface (12) opposite to the first surface (11), and an outer peripheral surface (13) disposed between the first surface (11) and the second surface (12); The first surface (11) and the second surface (12) of the aluminum sheet and / or the copper sheet have been subjected to anodization treatment, and at least a portion of the outer peripheral surface (13) of the aluminum sheet and / or the copper sheet has not been subjected to anodization; The aluminum sheet and / or copper sheet used to sandwich the graphene heating layer (2) is welded or bonded through the non-anodized portion of the outer peripheral surface (13) to sandwich and fix the graphene heating layer (2).

3. The graphene heating structure according to claim 1, characterized in that: The insulating heat-conducting layer (1) comprises a stacked insulating layer (1a) and a heat-conducting layer (1b), wherein the insulating layer (1a) is arranged in contact with the graphene heating layer (2); The insulating layer (1a) comprises a film structure made of polyimide, and the heat-conducting layer (1b) is an aluminum sheet and / or a copper sheet.

4. The graphene heating structure according to any one of claims 1 to 3, characterized in that: The graphene heating sheet has a serpentine shape in the length direction of the graphene heating layer (2), and the graphene heating layer (2) is a multi-layer arrangement of the graphene heating sheets.

5. The graphene heating structure according to claim 4, characterized in that: The serpentine shape of the graphene heating sheet forms a plurality of bending areas (21), and the insulating heat-conducting layer (1) is provided with notches (14) corresponding to at least part of the bending areas (21); The insulating heat-conducting layer (1) comprises long sides (100) arranged opposite to each other and short sides (200) disposed opposite to each other between the two long sides (100), and the notches (14) comprise long side notches formed on the long sides (100) and short side notches formed on the short sides (200); The relatively long sides of the insulating heat-conducting layer (1) include a first long side and a second long side, and at least one long side notch is provided on each of the first long side and the second long side. The first long side notch on the first long side and the long side notch on the second long side are alternately distributed in the length direction of the insulating heat-conducting layer (1).

6. The graphene heating structure according to claim 1, characterized in that: The graphene heating structure further comprises: An electrode sheet, a portion of which is sandwiched between two insulating heat-conducting layers to connect to the graphene heating layer, and another portion of which is located outside the two insulating heat-conducting layers to connect to a power source; The electrode sheet is made of a copper sheet or a conductive cloth, and is welded or riveted to one end and / or both ends of the graphene heating layer (2) in the length direction.

7. The graphene heating structure according to claim 1, characterized in that: The graphene heating structure further comprises: A temperature sensor, wherein the temperature sensor is embedded in the graphene heating layer (2) or is externally disposed outside the insulating heat-conducting layer (1); The graphene heating structure is a plate-like structure that is an elongated strip as a whole, wherein the thickness of the metal sheet that serves as at least a part of the graphene heating structure satisfies 1 mm to 1.5 mm.

8. A graphene heating module, characterized in that: It comprises a plurality of stacked graphene heating structures (3), wherein the graphene heating structure (3) is the graphene heating structure according to any one of claims 1 to 7.

9. The graphene heating module according to claim 8, characterized in that: Two adjacent graphene heating structures (3) are arranged at a distance in the stacking direction to form an air flow channel for air flow; The graphene heating module also includes a limiting frame (4) and a fixing frame (5); The insulating heat-conducting layer (1) in the graphene heating structure comprises long sides (100) arranged opposite to each other and short sides (200) disposed opposite to each other between the two long sides (100), wherein the long sides (100) are provided with long side notches, and the short sides (200) are provided with short side notches. The limiting framework (4) is embedded in the long side notches of the plurality of graphene heating structures (3) so that two adjacent graphene heating structures (3) are spaced apart in the length direction of the graphene heating structures (3); The fixing frame (5) is embedded in the short side notches of the plurality of graphene heating structures (3) so as to fix the plurality of graphene heating structures (3) in the width direction of the graphene heating structures (3).

10. A heating device, characterized in that: The graphene heating module comprises the graphene heating module as described in claim 8 or 9, wherein the graphene heating module is constructed in a rectangular, circular or ring shape.

11. The heating device according to claim 10, characterized in that The heating device comprises: A fan, wherein the air outlet direction of the fan is toward the graphene heating module, so that the airflow driven by the fan can be heated by the graphene heating module and flow out through the airflow channel formed between two adjacent graphene heating structures in the graphene heating module; The heating device is an air-heating heating device.

12. The heating device according to claim 10, characterized in that The heating device also includes: A temperature controller is used to monitor the temperature of the graphene heating module and disconnect the electrical connection between the graphene heating module and a power source when the temperature of the graphene heating module exceeds a preset temperature value.

Images