Carbon fiber heating sheet

Abstract

The utility model discloses a carbon fiber heating sheet, which relates to the technical field of carbon fiber heating sheets and comprises a heat conduction layer, a flexible structure layer is arranged at the bottom of the heat conduction layer, a first insulating layer is arranged at the bottom of the flexible structure layer, and a carbon fiber braid layer is arranged at the bottom of the first insulating layer. And electrodes are arranged at the two ends of the carbon fiber braid layer. According to the utility model, through the arrangement of the carbon fiber heating layer and the utilization of the excellent conductivity of the carbon fiber yarns, heat can be rapidly generated after the electrodes are electrified, the resistance value is stable, the heating efficiency cannot greatly fluctuate due to temperature change during long-time use, and the heating stability can be ensured; by introducing cooling liquid or a heating medium, auxiliary regulation and control of the temperature of the carbon fiber braid layer can be achieved, the temperature regulation range is further widened, and the requirement for accurate temperature control in different scenes is met.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber heating element technology, and specifically to a carbon fiber heating element. Background Technology

[0002] A heating element is a device that converts electrical energy into heat energy, playing a crucial role in various scenarios requiring heating. In the current heating element market, traditional metal wire heating elements and PTC (positive temperature coefficient) ceramic heating elements are widely used. However, they have many drawbacks.

[0003] During prolonged use, metal wire heating elements are prone to oxidation at high temperatures due to the resistive properties of metal, leading to increased resistance, reduced heating efficiency, and shortened lifespan. For example, in some electric heaters, the heating speed of metal wire heating elements slows down significantly after a period of use, while power consumption increases. Although PTC ceramic heating elements have some automatic temperature control characteristics, their heating efficiency is relatively low, and their heating rate is slow in low-temperature environments. In cold winters, heating devices using PTC ceramic heating elements require a long time to reach a comfortable temperature. Therefore, a carbon fiber heating element is proposed. Utility Model Content

[0004] This invention provides a carbon fiber heating element to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A carbon fiber heating element includes a heat-conducting layer, a flexible structural layer at the bottom of the heat-conducting layer, a first insulating layer at the bottom of the flexible structural layer, a carbon fiber braided layer at the bottom of the first insulating layer, electrodes at both ends of the carbon fiber braided layer, a second insulating layer at the bottom of the carbon fiber braided layer, and a sealant layer on the surface of the second insulating layer.

[0007] A further improvement of this utility model is that: the surface of the heat-conducting layer is provided with heat dissipation patterns, the surface of the heat-conducting layer is provided with a metal film, and the surface of the metal film is provided with a ceramic coating.

[0008] A further improvement of the present invention is that the carbon fiber braided layer is made of multiple bundles of carbon fiber filaments arranged in a uniform manner, the diameter of a single carbon fiber filament is 5-7 micrometers, and each bundle of carbon fiber filaments contains 1000-1500 single filaments.

[0009] A further improvement of this utility model is that the first insulating layer and the second insulating layer are made of high-temperature resistant and insulating polyimide film material, with a long-term operating temperature range of -200℃ to 250℃.

[0010] The further improvement of the technical scheme of the utility model lies in that: the material of the heat conduction layer is made of aluminum alloy material, the depth of the heat dissipation lines arranged on the surface is 0.05-0.1 millimeter, the width is 0.1-0.2 millimeter, and the line spacing is 0.2-0.3 millimeter.

[0011] The further improvement of the technical scheme of the utility model lies in that: the flexible structure layer is composed of elastic polymer material and nanofiber reinforced material, and the nanofiber reinforced material is uniformly dispersed in the elastic polymer material.

[0012] The further improvement of the technical scheme of the utility model lies in that: the sealing adhesive layer is made of organic silicon sealant, and the temperature resistance range is -50 DEG C to 200 DEG C.

[0013] The further improvement of the technical scheme of the utility model lies in that: the carbon fiber braided layer is provided with a microchannel structure, and the microchannel is made of medical grade silica gel material, and the channel diameter is 0.2-0.5 millimeter.

[0014] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0015] The utility model provides a carbon fiber heating sheet, through the setting of carbon fiber heating layer, utilize excellent electric conductivity of carbon fiber silk, can produce heat rapidly through electrode energization, and the resistance value is stable, in long time use, the heating efficiency will not fluctuate greatly due to temperature change, can ensure the stability of heating, and the microchannel structure arranged in the carbon fiber braided layer passes in cooling liquid or heating medium, can realize the auxiliary regulation and control of the temperature of the carbon fiber braided layer, further widen the temperature regulation range, satisfy the accurate control demand of temperature under different scenes. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the front view structure schematic drawing of the utility model;

[0017] Figure 2 It is the exploded view structure schematic drawing of the utility model;

[0018] Figure 3 It is the exploded view structure schematic drawing of the utility model;

[0019] Figure 4 It is the section view structure schematic drawing of the utility model.

[0020] In the drawing: 1, heat conduction layer, 2, heat dissipation lines, 3, metal film, 4, ceramic coating, 5, flexible structure layer, 6, first insulating layer, 7, carbon fiber braided layer, 8, electrode, 9, second insulating layer, 10, sealing adhesive layer. DETAILED DESCRIPTION

[0021] The utility model makes further detailed description in combination with examples: Example 1

[0022] As Figures 1-4 The utility model provides a carbon fiber heating sheet, including heat conducting layer 1, the bottom of heat conducting layer 1 is provided with flexible structure layer 5, the bottom of flexible structure layer 5 is provided with first insulating layer 6, the bottom of first insulating layer 6 is provided with carbon fiber braided layer 7, the both ends of carbon fiber braided layer 7 are provided with electrode 8, the bottom of carbon fiber braided layer 7 is provided with second insulating layer 9, the surface of second insulating layer 9 is provided with sealant layer 10.

[0023] In this embodiment, the carbon fiber wire is powered by the electrode 8. Because the carbon fiber wire has excellent conductivity and high electric heating conversion efficiency, when the current passes through, the electrons move in the carbon fiber wire and interact with the atomic lattice, generating a large amount of heat. At the same time, the resistance value is stable, which can ensure the stability of the heating performance in different temperature environments. The generated heat is transferred outward, and the heat of the carbon fiber heating layer is conducted out through the heat conducting layer 1. Moreover, the surface of the heat conducting layer is micro-processed to form a heat dissipation pattern 2, which further increases the heat dissipation area and improves the heat dissipation efficiency, so that the heat can be evenly dissipated to the surrounding environment. Example 2

[0024] As Figures 1-4 On the basis of example 1, the utility model provides a technical scheme: preferably, the surface of the heat conducting layer 1 is provided with a heat dissipation pattern 2, the surface of the heat conducting layer 1 is provided with a metal film 3, the surface of the metal film 3 is provided with a ceramic coating 4, the carbon fiber braided layer 7 is made of a plurality of carbon fiber wires arranged and braided uniformly, the single wire diameter of the carbon fiber wire is 5-7 microns, each bundle of carbon fiber wires contains 1000-1500 single wires, the materials of the first insulating layer 6 and the second insulating layer 9 are polyimide film materials with high temperature resistance and good insulating properties, and the long-term use temperature range is -200°C to 250°C.

[0025] In this embodiment, the metal film 3 with high reflectivity and the ceramic coating 4 with low emissivity arranged on the outer side of the heat conducting layer 1 can concentrate and reflect the heat to the direction needing heating, reduce heat loss, and greatly improve the heat utilization rate. At the same time, the flexible structure layer 5 is composed of an elastic polymer material and a nanofiber reinforced material, which can stretch and bend to a certain extent, further expanding the application scenarios. The insulating layer is made of polyimide film with high temperature resistance and good insulating properties, and is arranged on both sides of the carbon fiber braided layer 7, which can effectively prevent current leakage, ensure user safety, and have good flexibility without damage when bending with the heating layer. Example 3

[0026] As Figures 1-4 The utility model discloses a technical scheme on the basis of embodiment 1: preferably, the material of heat conduction layer 1 adopts aluminum alloy material to make, the depth of the heat dissipation line 2 set up on the surface is 0.05-0.1 millimeter, the width is 0.1-0.2 millimeter, and the pitch between the lines is 0.2-0.3 millimeter, and flexible structure layer 5 is made of elastic polymer material and nanofiber reinforced material compound, nanofiber reinforced material evenly disperses in elastic polymer material, and sealing adhesive layer 10 adopts organic silicon sealant, and its temperature resistance range is -50 DEG C to 200 DEG C, and the carbon fiber braided layer 7 is provided with microchannel structure, and the microchannel is made of medical grade silica gel material, and the channel diameter is 0.2-0.5 millimeter.

[0027] In this embodiment, through the microchannel structure provided in the carbon fiber braided layer 7, by passing in cooling liquid or heating medium, the temperature of the carbon fiber braided layer 7 can be assisted to control, further widen the temperature regulation range, satisfy the accurate control demand of temperature under different scenes, the setting of the sealing adhesive layer 10 can seal the edge of the heating sheet, prevent moisture and dust from entering the inside, affect the performance and service life.

[0028] Now the working principle of the carbon fiber heating sheet will be described in detail.

[0029] As Figures 1-4As shown, in use, the carbon fiber filaments are powered by the electrodes 8, and due to the excellent electrical conductivity and high electrical-to-thermal conversion efficiency of the carbon fiber filaments, when current passes through, electrons move within the carbon fiber filaments, interact with atomic lattices, generate a large amount of heat, and heat up, and the resistance value is stable, which can ensure the stability of the heating performance under different temperature environments, and the generated heat is transferred outward, the heat of the carbon fiber heating layer is conducted out through the heat conduction layer 1, and the surface of the heat conduction layer is micro-processed to form heat dissipation lines 2, which further increases the heat dissipation area and improves the heat dissipation efficiency, so that the heat can be evenly dissipated to the surrounding environment, the metal film 3 with high reflectivity and the ceramic coating 4 with low emissivity arranged on the outer side of the heat conduction layer 1 can concentrate and reflect the heat to the direction needing heating, reduce heat loss, and greatly improve the heat utilization rate, and the flexible structure layer 5 composed of elastic polymer material and nanofiber reinforced material can stretch and bend to a certain extent, further expanding the application scenarios, the insulating layer is made of polyimide film with good high-temperature resistance and insulation performance, and is arranged on both sides of the carbon fiber woven layer 7, which can effectively prevent current leakage and protect the safety of users, has good flexibility, can bend with the heating layer without being damaged, and the micro-channel structure arranged in the carbon fiber woven layer 7 can realize auxiliary regulation of the temperature of the carbon fiber woven layer 7 by passing in cooling liquid or heating medium, further widen the temperature regulation range, and meet the accurate control requirements of the temperature in different scenes, and the sealing adhesive layer 10 can seal the edges of the heating sheet to prevent moisture and dust from entering the inside and affecting the performance and service life.

[0030] The above has made a detailed description of the utility model, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, without departing from the spirit of the utility model, the modifications or improvements are within the protection scope of the utility model.

Claims

1. A carbon fiber heating element, comprising a thermally conductive layer (1), characterized in that: The bottom of the heat-conducting layer (1) is provided with a flexible structure layer (5), the bottom of the flexible structure layer (5) is provided with a first insulating layer (6), the bottom of the first insulating layer (6) is provided with a carbon fiber braided layer (7), the two ends of the carbon fiber braided layer (7) are provided with electrodes (8), the bottom of the carbon fiber braided layer (7) is provided with a second insulating layer (9), and the surface of the second insulating layer (9) is provided with a sealant layer (10).

2. The carbon fiber heating element according to claim 1, characterized in that: The surface of the heat-conducting layer (1) is provided with heat dissipation texture (2), the surface of the heat-conducting layer (1) is provided with a metal film (3), and the surface of the metal film (3) is provided with a ceramic coating (4).

3. The carbon fiber heating element according to claim 1, characterized in that: The carbon fiber braided layer (7) is made of multiple bundles of carbon fiber filaments arranged in a uniform manner. The diameter of a single carbon fiber filament is 5-7 micrometers, and each bundle of carbon fiber filaments contains 1000-1500 single filaments.

4. A carbon fiber heating element according to claim 1, characterized in that: The first insulating layer (6) and the second insulating layer (9) are made of polyimide film material with high temperature resistance and good insulation performance, and the long-term operating temperature range is -200℃ to 250℃.

5. A carbon fiber heating element according to claim 1, characterized in that: The heat-conducting layer (1) is made of aluminum alloy material, and the heat dissipation texture (2) on the surface has a depth of 0.05-0.1 mm, a width of 0.1-0.2 mm, and a texture spacing of 0.2-0.3 mm.

6. A carbon fiber heating element according to claim 1, characterized in that: The flexible structural layer (5) is composed of an elastic polymer material and a nanofiber reinforcing material, with the nanofiber reinforcing material uniformly dispersed in the elastic polymer material.

7. A carbon fiber heating element according to claim 1, characterized in that: The sealant layer (10) is made of silicone sealant, and its temperature resistance range is -50℃ to 200℃.

8. A carbon fiber heating element according to claim 1, characterized in that: The carbon fiber braided layer (7) is provided with a microchannel structure, which is made of medical-grade silicone material and has a channel diameter of 0.2-0.5 mm.

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