Graphene mica heating substrate

Abstract

The utility model discloses a graphene mica heating substrate, which comprises a graphene heating sheet, a first insulating film, a second insulating film, a first mica sheet, a thermal insulation layer, a second mica sheet and a reflecting layer, the first insulating film covers the front surface of the graphene heating sheet; the second insulating film covers the back surface of the graphene heating sheet; the first mica sheet covers the outer surface of the first insulating film; the thermal insulation layer covers the outer surface of the second insulating film; the second mica sheet covers the outer surface of the thermal insulation layer; the reflecting layer covers the outer surface of the second mica sheet; therefore, heat generated by the graphene heating sheet is directly transferred to the second mica sheet, the heat transfer efficiency is high, then the heat is reflected to the second mica sheet by the reflecting layer, and most of heat radiation can be efficiently reflected back, so that the heat transfer is reduced, and the graphene mica heating substrate has a heat collection and energy gathering effect; the heat energy utilization rate is higher.

Description

Technical Field

[0001] This utility model relates to the field of heating plates, and in particular to a graphene mica heating substrate. Background Technology

[0002] The mica heating plate is made by bonding various non-metallic conductive and radiative materials such as inorganic ceramics and glass to the outer surface of the mica plate through processes such as printing and high-temperature sintering to form an inorganic conductive resistive film layer. The surface is covered with a mica insulating sheet and the perimeter is edged with metal to form an integral component. The inorganic conductive resistive film layer emits infrared heat when energized, forming a heat radiation source and heating through convection.

[0003] The prior art discloses a graphene-mica heating film structure, which includes a metal heating plate, a lower mica paper, an upper mica paper, a graphene coating, welding holes, and a power supply terminal block. The upper and lower ends of the metal heating plate are respectively laminated with the lower mica paper and the upper mica paper, and the outer surfaces of the lower mica paper and the upper mica paper are coated with a graphene coating. Coating the heating film increases the heat dissipation surface area, enabling rapid conversion of surface heat. Graphene also has better far-infrared emissivity and energy-saving effect. However, because the heating film lacks a reflective structure, it does not have a heat collection and energy-concentrating function, preventing the mica sheet from reflecting heat itself, and the thermal energy utilization rate needs to be improved.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a graphene-mica heating substrate. Through the design of a graphene heating element, a second mica sheet, and a reflective layer, the heat generated by the graphene heating element is directly transferred to the second mica sheet, resulting in high heat transfer efficiency. Then, the reflective layer reflects the heat back onto the second mica sheet, which can efficiently reflect most of the heat radiation back, thereby reducing heat transfer. This gives the graphene-mica heating substrate the function of heat collection and energy concentration, resulting in higher thermal energy utilization.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A graphene-mica heating substrate, comprising:

[0008] A graphene heating element, wherein the graphene heating element has a front side and a back side disposed on opposite sides;

[0009] A first insulating film is applied to the front side of the graphene heating element.

[0010] The second insulating film is applied to the back of the graphene heating element;

[0011] The first mica sheet is applied to the outer surface of the first insulating film;

[0012] The insulation layer is applied to the outer surface of the second insulating film;

[0013] The second mica sheet is applied to the outer surface of the insulation layer.

[0014] A reflective layer is applied to the outer surface of the second mica sheet.

[0015] As a preferred embodiment, the first mica sheet and the second mica sheet are coated on the front and back sides of the first insulating film and the second insulating film by hot pressing or bonding.

[0016] As a preferred embodiment, the reflective layer is applied to the outer surface of the second mica sheet by hot pressing or bonding.

[0017] As a preferred embodiment, the reflective layer is a high-brightness aluminum foil, which has high gloss, good reflectivity, and excellent barrier properties.

[0018] As a preferred embodiment, the insulation layer is ceramic cotton or reflective aluminum foil.

[0019] As a preferred embodiment, both the first insulating film and the second insulating film are made of PI, PET, or PTFE material.

[0020] As a preferred embodiment, the graphene heating element, the first insulating film, the second insulating film, the first mica sheet, the heat insulation layer, the second mica sheet, and the reflective layer are surrounded by a metal edging, which prevents external moisture and humidity from entering the heating element as a whole.

[0021] As a preferred embodiment, the thickness of the first mica sheet and the second mica sheet is 0.5 mm.

[0022] As a preferred embodiment, the thickness of the graphene heating element is 0.05 mm.

[0023] As a preferred embodiment, the second mica sheet is provided with a clearance hole, and the graphene heating element is connected to two lead wire ends. The two lead wire ends are exposed at the clearance hole of the second mica sheet and are respectively connected to leads. The ends of the leads extend outside the second mica sheet.

[0024] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly utilizes the design of a graphene heating element, a second mica sheet, and a reflective layer. The heat generated by the graphene heating element is directly transferred to the second mica sheet, resulting in high heat transfer efficiency. Then, the reflective layer reflects the heat back onto the second mica sheet, efficiently reflecting most of the heat radiation back, thereby reducing heat transfer. This gives the graphene mica heating substrate a heat collection and energy-concentrating effect, resulting in higher thermal energy utilization. Furthermore, the design of the reflective layer gives the graphene mica heating substrate a high surface gloss, providing excellent visual effects. It also has a good barrier effect against moisture, effectively preventing items from getting damp. Finally, the design of the first and second insulating films gives it outstanding high-temperature resistance.

[0025] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1 This is a rear view of an embodiment of the present utility model;

[0027] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0028] Figure 3 This is another cross-sectional view of an embodiment of the present utility model;

[0029] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0030] Explanation of reference numerals in the attached diagram:

[0031] 100, Graphene heating element; 200, First insulating film

[0032] 11. Metal edging 12. Clearance holes

[0033] 13. Lead end 14. Lead

[0034] 300, second insulating film 400, first mica sheet

[0035] 500, insulation layer 600, second mica sheet

[0036] 700. Reflective layer. Detailed Implementation

[0037] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0038] In the description of this utility model, it should be noted that the directional terms such as "up", "down", "front", "back", "left", and "right" indicate the orientation and positional relationship based on the accompanying drawings or the orientation or positional relationship shown when wearing and using the device normally. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0039] A graphene-mica heating substrate includes a graphene heating element 100, a first insulating film 200, a second insulating film 300, a first mica sheet 400, a heat insulation layer 500, a second mica sheet 600, and a reflective layer 700.

[0040] Preferably, the graphene heating element 100, the first insulating film 200, the second insulating film 300, the first mica sheet 400, the heat insulation layer 500, the second mica sheet 600 and the reflective layer 700 are surrounded by a metal edging 11, so that the heating element as a whole is protected from external moisture and humidity entering the interior of the heating element.

[0041] The graphene heating element 100 has a front and a back side arranged opposite to each other; preferably, the second mica sheet 600 is provided with a clearance hole 12, and the graphene heating element 100 is connected to two lead wire ends 13. The two lead wire ends 13 are exposed at the clearance hole 12 of the second mica sheet 600 and are respectively connected to lead wires 14, and the ends of the lead wires 14 extend out of the second mica sheet 600.

[0042] Preferably, the thickness of the graphene heating element 100 is 0.05 mm. Preferably, the graphene heating element 100 is made by mixing graphene slurry and conductive powder and molding them together by heating and pressing, so that the materials can be fully combined, the conductive graphene can be evenly dispersed, and the heating effect of each part of the heating substrate is uniform.

[0043] Alternatively, in this embodiment, the graphene heating element 100 is made by mixing Teflon, graphene slurry, and conductive powder and then heating and pressing them together to form a single piece. This effectively improves the high-temperature resistance of the heating film itself, enabling it to provide higher temperatures to the outside, enhancing its functionality, and meeting more application scenarios. The Teflon is selected with Teflon powder of appropriate particle size, preferably with finer particle size to facilitate uniform mixing. Common particle sizes are between 10-50 micrometers. The type of graphene is selected according to the required performance, such as graphene oxide or reduced graphene oxide, and its good dispersibility is ensured. Graphene products that have undergone surface modification or functionalization can be selected to improve their compatibility in the mixed system.

[0044] The appropriate conductive powder is selected according to the specific conductivity requirements, such as metal powder (e.g., silver powder, copper powder, etc.), carbon nanotubes, conductive carbon black, etc.

[0045] Before mixing, the materials are dried and pre-dispersed. During drying, Teflon, graphene, and conductive powder are dried separately under appropriate temperature and conditions to remove moisture and other volatile impurities, so as to avoid affecting the mixing effect or causing a decrease in material performance during the mixing process. During pre-dispersion, graphene and conductive powder are added to an appropriate amount of solvent and dispersed evenly in the solvent by ultrasonic dispersion, mechanical stirring, or other methods to form a stable dispersion or slurry.

[0046] Alternatively, a melt blending method can be used; Teflon is heated to a molten state, and then graphene and conductive powder are added. The mixture is then carried out using equipment such as a high-speed stirrer or an extruder, so that the graphene and conductive powder are uniformly dispersed in the Teflon matrix. The appropriate mixing method can be selected according to actual needs, which will not be elaborated here.

[0047] Alternatively, the graphene heating element 100 may also have a first Teflon layer and a second Teflon layer on its front and back sides; the first Teflon layer is disposed between the front side of the graphene heating element 100 and the first insulating film 200; the second Teflon layer is disposed between the back side of the graphene heating element 100 and the second insulating film 300, thereby effectively improving the high temperature resistance of the heating substrate itself, enabling it to provide higher temperatures to the outside, with enhanced functionality, and meeting more application scenarios.

[0048] The first insulating film 200 is applied to the front side of the graphene heating element 100; the second insulating film 300 is applied to the back side of the graphene heating element 100; preferably, the first insulating film 200 and the second insulating film 300 are both made of PI material, PET material or PTFE material.

[0049] The first mica sheet 400 is applied to the outer surface of the first insulating film 200; the heat insulation layer 500 is applied to the outer surface of the second insulating film 300. Preferably, the heat insulation layer 500 is ceramic cotton or reflective aluminum foil, which can enhance the heat insulation effect of the graphene mica heating substrate. Secondly, aluminum foil has a high reflectivity to light and heat, and its smooth surface can reflect most of the heat radiation like a mirror. When the heat radiation from the graphene heating element 100 reaches the reflective aluminum foil, most of the heat will be reflected back, reducing heat absorption and thus reducing the temperature rise of the object's surface, playing a role in heat insulation. In addition, aluminum foil itself has a certain barrier property, which can completely block media such as air. In the heat insulation system, it can act as a heat insulation barrier, effectively reducing the transfer of heat through conduction. It can not only reflect heat radiation from the outside, but also prevent indoor heat from radiating outward to a certain extent. When used in conjunction with the reflective layer, it can efficiently reflect most of the heat radiation back, thereby reducing heat transfer and enabling the graphene mica heating substrate to have a heat collection and energy concentration function, resulting in higher thermal energy utilization.

[0050] The second mica sheet 600 is applied to the outer surface of the insulation layer 500; preferably, the first mica sheet 400 and the second mica sheet 600 are applied to the front and back sides of the first insulating film 200 and the second insulating film 300 by hot pressing or bonding. Preferably, the thickness of the first mica sheet 400 and the second mica sheet 600 is 0.5 mm.

[0051] The reflective layer 700 is applied to the outer surface of the second mica sheet 600. Preferably, the reflective layer 700 is applied to the outer surface of the second mica sheet 600 by hot pressing or bonding. Preferably, the reflective layer 700 is a high-gloss aluminum foil, which has high gloss, good reflectivity, and excellent barrier properties.

[0052] The key design feature of this invention lies in its use of a graphene heating element, a second mica sheet, and a reflective layer. The heat generated by the graphene heating element is directly transferred to the second mica sheet, resulting in high heat transfer efficiency. The reflective layer then reflects the heat back onto the second mica sheet, efficiently reducing heat transfer and giving the graphene-mica heating substrate a heat-collecting and energy-concentrating effect, leading to higher thermal energy utilization. Furthermore, the reflective layer design gives the graphene-mica heating substrate a high surface gloss, providing excellent visual appeal and good barrier properties against moisture, effectively preventing items from getting damp. Finally, the design of the first and second insulating films ensures outstanding high-temperature resistance.

[0053] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A graphene-mica heating substrate, characterized in that: Including: A graphene heating element, wherein the graphene heating element has a front side and a back side disposed on opposite sides; A first insulating film is applied to the front side of the graphene heating element. The second insulating film is applied to the back of the graphene heating element; The first mica sheet is applied to the outer surface of the first insulating film; The insulation layer is applied to the outer surface of the second insulating film; The second mica sheet is applied to the outer surface of the insulation layer. A reflective layer is applied to the outer surface of the second mica sheet.

2. The graphene-mica heating substrate according to claim 1, characterized in that: The first mica sheet and the second mica sheet are applied to the front and back sides of the first insulating film and the second insulating film by hot pressing or bonding.

3. The graphene-mica heating substrate according to claim 1, characterized in that: The reflective layer is applied to the outer surface of the second mica sheet by hot pressing or bonding.

4. The graphene-mica heating substrate according to claim 3, characterized in that: The reflective layer is a high-brightness aluminum foil.

5. The graphene-mica heating substrate according to claim 3, characterized in that: The insulation layer is ceramic cotton or reflective aluminum foil.

6. The graphene-mica heating substrate according to claim 1, characterized in that: Both the first insulating film and the second insulating film are made of PI, PET or PTFE.

7. The graphene-mica heating substrate according to claim 1, characterized in that: The graphene heating element, the first insulating film, the second insulating film, the first mica sheet, the heat insulation layer, the second mica sheet, and the reflective layer are all surrounded by metal edging.

8. The graphene-mica heating substrate according to claim 7, characterized in that: The thickness of the first mica sheet and the second mica sheet is 0.5 mm.

9. The graphene-mica heating substrate according to claim 1, characterized in that: The thickness of the graphene heating element is 0.05 mm.

10. The graphene-mica heating substrate according to claim 1, characterized in that: The second mica sheet is provided with a clearance hole. The graphene heating element is connected to two lead wire ends. The two lead wire ends are exposed at the clearance hole of the second mica sheet and are respectively connected to the lead wires. The ends of the lead wires extend outside the second mica sheet.

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