Transparent graphene soft and hard combined heating body

Abstract

The utility model discloses a transparent graphene soft and hard combined heating body which comprises a first composite protection layer, a micro-magnetic function layer and an electric heating conversion layer which are attached to one another. The first composite protection layer comprises a first epoxy resin frame and a first macromolecular prepolymer fixedly arranged in the first epoxy resin frame; the micro-magnetic functional layer is used for releasing a magnetic field; when the first composite protective layer and the micro-magnetic functional layer are not arranged on the side, close to the skin, of the electric heating conversion layer, a first protective film is further arranged on the side, close to the skin, of the electric heating conversion layer; the first protective film is used for insulation protection. According to the utility model, the epoxy resin frame and the high-molecular prepolymer can be better attached to the skin, so that a user feels more comfortable when using the heating body to carry out physical therapy.

Description

Technical Field

[0001] The utility model relates to the technical field of electrothermal materials, and particularly relates to a heating element combining transparent graphene with soft and hard materials. Background Art

[0002] The existing transparent heating film is usually composed of a transparent substrate, a graphene heating layer, electrodes, and an insulating protective layer. Among them, the transparent substrate is generally made of polycarbonate (PC) or polymethyl methacrylate (PMMA) as the support structure of the heating element.

[0003] The graphene heating layer is the core part of the graphene heating element and is composed of graphene materials. Graphene has excellent electrical conductivity and thermal conductivity and can quickly generate heat after being powered on. The electrodes are used to connect the power supply and the graphene heating layer and are usually made of conductive materials such as metals or conductive pastes. The design and layout of the electrodes will affect the heating uniformity and efficiency of the heating element. The insulating protective layer is used to protect the graphene heating layer and the electrodes to prevent electric leakage and short circuit. The insulating protective layer is generally made of insulating materials such as polyethylene terephthalate (PET) and polyimide (PI).

[0004] The basic physical property of heat dissipation of the heating element determines that the heat dissipation of the heating element is evenly radiated to both sides, resulting in only half of the total radiation of the heating element being utilized for energy consumption. Moreover, when far-infrared light waves propagate in different media, refraction will occur. Solving the problem of low radiation utilization rate is one of the urgent problems that heating element researchers need to solve.

[0005] The heat that the human body feels is all in the form of irradiation, and only the far-infrared band (6 - 16um) can better penetrate into the human body, and the resonance caused by it is more effective for the physical therapy effect of the human body. Reducing the loss of far-infrared waves during heat radiation is also an urgent problem for electrothermal engineering personnel. Content of the Utility Model

[0006] In order to solve the problems of the existing technology, the utility model provides a heating element structure that is soft and skin-friendly, and has high heating efficiency and far-infrared wave utilization rate.

[0007] Therefore, the utility model adopts the following technical solutions:

[0008] A heating element combining transparent graphene with soft and hard materials, comprising a first composite protective layer and an electrothermal conversion layer that are attached to each other;

[0009] The first composite protective layer includes a first epoxy resin frame and a first high molecular prepolymer fixedly arranged in the first epoxy resin frame; the first high molecular prepolymer is used for attaching to the human skin;

[0010] The electrothermal conversion layer is used to convert the input electrical energy into heat energy and release it;

[0011] The first composite protective layer is disposed on either side of the electrothermal conversion layer;

[0012] When there is no such first composite protective layer on the side of the electrothermal conversion layer close to the skin, a first protective film is further disposed on the side of the electrothermal conversion layer close to the skin;

[0013] The first protective film is used for insulation protection.

[0014] Preferably, a micro-magnetic functional layer is further included, and the micro-magnetic functional layer is disposed on either side of the electrothermal conversion layer, and the micro-magnetic functional layer is used for releasing a magnetic field.

[0015] Preferably, a second composite protective layer is further disposed on the side of the first composite protective layer symmetrical to the electrothermal conversion layer;

[0016] The second composite protective layer includes a second epoxy resin frame and a second prepolymer fixed in the second epoxy resin frame, and the second prepolymer is used for fitting to the human skin;

[0017] The side surfaces of the first composite protective layer and the second composite protective layer away from the electrothermal conversion layer are both smooth planes or curved surfaces.

[0018] Preferably, a transparent reflective layer is further disposed on the side of the electrothermal conversion layer away from the skin; the transparent reflective layer is used for reflecting the heat energy emitted by the electrothermal conversion layer.

[0019] Preferably, the electrothermal conversion layer includes an electrode layer and a graphene conductive heating layer, and the electrode layer and the graphene conductive heating layer are disposed in a fitting manner; the electrode layer is used for receiving electric energy, and the graphene conductive heating layer is used for converting electric energy into heat energy; the electrothermal conversion layer is transparent.

[0020] Preferably, the thicknesses of the first composite protective layer and the second composite protective layer are 3 mm - 5 mm.

[0021] Preferably, a second protective film is further disposed in a fitting manner on the side surface of the electrothermal conversion layer away from the skin, and the second protective film is used for insulation protection.

[0022] Compared with the prior art, the present utility model has the following beneficial effects:

[0023] 1. The soft prepolymer in the epoxy resin frame in the present utility model can better fit the skin, so that the stress on the contact surface is relieved when the heating element of the present utility model is used for physiotherapy, and the physiotherapy process is more comfortable.

[0024] 2. The structure of the present utility model makes the far-infrared radiation direction concentrated through the transparent reflective layer, and can ensure the far-infrared radiation direction even in the bent and attached state, without causing low energy utilization rate due to the refraction of different film layers, thus improving the energy utilization rate.

[0025] 3. The epoxy resin frame of the present utility model can support the polymer prepolymer, the micro-magnetic functional layer, the transparent reflective layer and the electrothermal conversion layer, and solves the problem of poor mechanical support strength of general graphene heating materials.

[0026] 4. In the present utility model, all the materials between the electrothermal conversion layer and the contact surface between the electrothermal conversion layer and the human body are transparent, which solves the problem of unobvious physiotherapy effect caused by the change of the far-infrared light band to a non-far-infrared band during the transmission process.

[0027] 5. The structure of the present utility model has good plasticity, wide adaptability and diverse usage scenarios. Brief Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0029] Figure 2 is an exploded structural diagram of an embodiment of the present utility model;

[0030] Wherein, 1. First polymer prepolymer, 2. First epoxy resin frame, 3. Micro-magnetic functional layer, 4. Electrothermal conversion layer, 5. Transparent reflective layer, 6. Second polymer prepolymer, 7. Second epoxy resin frame. Detailed Embodiment

[0031] The technical solutions of the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0032] Embodiment 1

[0033] A transparent graphene flexible-rigid combined heating element, the structure of which is as Figure 1 shown, and the exploded structure is as Figure 2 shown. The heating element is a layered structure, and from the side close to the skin to the side far from the skin are: the first composite protective layer, the micro-magnetic functional layer 3, the first protective film, the electrothermal conversion layer 4, the second protective film, the transparent reflective layer 5 and the second composite protective layer. The above layers are sequentially attached and arranged.

[0034] The first composite protective layer includes the first epoxy resin frame 1 and the first polymer prepolymer 2 fixedly arranged in the first epoxy resin frame;

[0035] The second composite protective layer includes the second epoxy resin frame 7 and the second polymer prepolymer 6 fixedly arranged in the second epoxy resin frame;

[0036] The thicknesses of the first composite protective layer and the second composite protective layer are both 3 mm - 5 mm;

[0037] When preparing the first composite protective layer and the second composite protective layer, first pour the epoxy resin frame, and after the poured epoxy resin frame is formed, then pour the polymer prepolymer therein.

[0038] The preparation method of the polymer prepolymer is recorded in the patent document with the publication number of CN118591033A.

[0039] The transparent reflective layer can be the PR40 infrared reflective film produced by 3M China Limited, which is used to reflect the heat of the electrothermal conversion layer and increase the heat utilization rate.

[0040] The micro-magnetic functional layer is used to release a weak magnetic field.

[0041] When preparing the micro-magnetic functional layer, first prepare a magnetic paste using magnetic powder, adhesive and solvent, then trim a 200 - 500 mesh screen plate into the required shape and apply it on the PET film, and finally, after coating the pre-prepared magnetic paste on the screen plate, remove the screen plate; the PET film and the magnetic paste thereon form the micro-magnetic functional layer.

[0042] The electrothermal conversion layer includes an electrode layer and a graphene conductive heating layer, and the electrode layer and the graphene conductive heating layer are attached and arranged; the electrothermal conversion layer is transparent.

[0043] The first protective film and the second protective film can be PET film or PI, and the first protective film and the second protective film are used for insulation protection.

[0044] The present utility model is used in a light wave physiotherapy room, specifically as a cushion or a backrest for patients.

[0045] Example 2

[0046] Different from Example 1, one of the first composite protective layer and the second composite protective layer is not included, and the remaining parts are sequentially attached and arranged.

[0047] Example 3

[0048] Different from Example 2, the micro-magnetic functional layer is not included, and the remaining parts are sequentially attached and arranged.

[0049] Example 4

[0050] Different from Example 3, one of the first protective film and the second protective film is not included, but when there is no first composite protective layer and micro-magnetic functional layer on the side of the electrothermal conversion layer close to the skin, the first protective film is retained. The remaining parts are sequentially attached and arranged.

[0051] Example 5

[0052] Different from Example 4, when the micro-magnetic functional layer is not included, the transparent reflective layer is replaced with the micro-magnetic functional layer. The remaining parts are sequentially laminated and arranged.

[0053] Example 6

[0054] Different from Example 1, when the micro-magnetic functional layer is applied to the first protective film or the second protective film, the magnetic paste is directly coated on the corresponding first protective film or the second protective film to form the micro-magnetic functional layer.

[0055] Comparative Example 1

[0056] The present utility model is used as the heating element 1 for testing.

[0057] A heating element having the same size and shape as the heating element 1 for testing is taken, but the polymer prepolymer part is replaced with epoxy resin and used as the heating element 2 for testing.

[0058] The Shore hardness of the surface of the heating element 1 for testing in contact with the human body is measured using a LX-A type Shore hardness tester. Then, the Shore hardness of the surface of the heating element 2 in contact with the human body is measured using a LX-D type Shore hardness tester.

[0059] The Shore hardness of the heating element 1 for testing is 56 HA, and the Shore hardness of the heating element 2 for testing is 30 HD;

[0060] It can be seen from the test that the surface of the heating element 1 for testing in contact with the human body is softer and more conformable to the physiotherapy part of the human body.

Claims

1. A heating element composed of a combination of transparent graphene, hard and soft materials, characterized in that: It includes a first composite protective layer and an electrothermal conversion layer that are attached to each other; The first composite protective layer includes a first epoxy resin frame and a first prepolymer fixedly arranged within the first epoxy resin frame; the first prepolymer is used for attaching to the human skin; The electrothermal conversion layer is used for converting the input electric energy into heat energy and releasing it; The first composite protective layer is arranged on either side of the electrothermal conversion layer; When there is no first composite protective layer on the side of the electrothermal conversion layer close to the skin, a first protective film is further arranged on the side of the electrothermal conversion layer close to the skin; The first protective film is used for insulation protection.

2. The transparent graphene-based flexible-rigid combined heating element according to claim 1, wherein: It further includes a micro-magnetic functional layer, the micro-magnetic functional layer is arranged on either side of the electrothermal conversion layer, and the micro-magnetic functional layer is used for releasing a magnetic field.

3. The transparent graphene-based flexible-rigid combined heating element according to claim 1, characterized in that: On the side of the first composite protective layer symmetrical about the electrothermal conversion layer, a second composite protective layer is further arranged; The second composite protective layer includes a second epoxy resin frame and a second prepolymer fixedly arranged within the second epoxy resin frame, and the second prepolymer is used for attaching to the human skin; The side surfaces of the first composite protective layer and the second composite protective layer away from the electrothermal conversion layer are both smooth planes or curved surfaces.

4. The transparent graphene-based flexible-rigid combined heating element according to any one of claims 1-3, characterized in that: On the side of the electrothermal conversion layer away from the skin, a transparent reflective layer is further arranged; the transparent reflective layer is used for reflecting the heat energy emitted by the electrothermal conversion layer.

5. The transparent graphene-based flexible-rigid combined heating element according to claim 1, wherein: The electrothermal conversion layer includes an electrode layer and a graphene conductive heating layer, the electrode layer and the graphene conductive heating layer are attached to each other; the electrode layer is used for receiving electric energy, and the graphene conductive heating layer is used for converting electric energy into heat energy; the electrothermal conversion layer is transparent.

6. The transparent graphene-based flexible-rigid combined heating element according to claim 3, characterized in that: The thickness of the first composite protective layer and the second composite protective layer is 3mm - 5mm.

7. The transparent graphene-based flexible-rigid combined heating element according to claim 4, characterized in that: On the side surface of the electrothermal conversion layer away from the skin, a second protective film is further attached, and the second protective film is used for insulation protection.

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