Novel composite graphene radiator

Abstract

The utility model discloses a novel composite graphene radiator, which comprises a graphene radiator body, a plurality of graphene radiating fins are arranged on the surface of the graphene radiator body, and a metal spraying layer is attached to at least part of the surface of each graphene radiating fin. According to the graphene radiator, the metal spraying layer is attached to the radiating fins of the graphene radiator body, so that heat transmitted to the surfaces of the radiating fins is quickly flattened by the metal spraying layer, the surface area of the radiating fins is large, and the metal spraying layer on the surface of the radiating fins can have the same large area, so that a good radiating effect is achieved. Besides, the metal spraying layer is of a layer body structure formed by spraying metal in a molten state on the heat dissipation fins and solidifying the metal, the metal spraying layer and the surfaces of the heat dissipation fins are firmly combined together, it is ensured that the metal spraying layer and the surfaces of the heat dissipation fins are in good contact, the heat transfer effect is improved, and the structural strength of the heat dissipation fins can be improved.

Description

Technical Field

[0001] This utility model relates to the field of graphene heat sinks, and in particular to a novel composite graphene heat sink. Background Technology

[0002] Non-metallic heat sinks are significantly lightweight and widely used in many electronics industries, particularly in the aerospace field (such as drones). However, because the materials used in non-metallic heat sinks contain coupling agents with low thermal conductivity, their heat conduction uniformity and flatness are somewhat weakened. Furthermore, their structural strength is far inferior to that of metallic materials, resulting in poorer impact resistance.

[0003] Chinese Patent Publication No. CN105385013A, published on March 9, 2016, discloses a non-metallic heat sink. The heat dissipation material used is prepared from the following raw materials in parts by weight: carbon nanotubes: 10-15 parts; polymethyl methacrylate: 3-5 parts; graphite: 10-12 parts; organomontmorillonite: 3-5 parts; hydroxyl silicone oil: 3.5-4.5 parts; clay: 2.5-3.5 parts; octamethylcyclotetrasiloxane: 5-6 parts; ethylene-vinyl acetate copolymer: 4-5 parts; polyphenylene sulfide: 1-2 parts; glass fiber: 0.8-1.2 parts; coupling agent: 0.5-0.8 parts; plasticizer: 0.5-0.8 parts. It is claimed that the heat sink has a thermal conductivity of 155 W / m·K; thus, its thermal conductivity is lower than that of pure aluminum and pure copper, but its overall weight is significantly lower than that of pure aluminum and pure copper for the same volume. Furthermore, because this type of non-metallic radiator is injection molded from a mixture of multiple materials, the thermally conductive materials are connected by a coupling agent, resulting in poor structural strength. Simultaneously, the coupling agent also hinders the thermal conductivity between the thermally conductive materials. Therefore, current non-metallic radiators require further improvement. Utility Model Content

[0004] The purpose of this invention is to provide a novel composite graphene radiator with a reasonable structure, high strength, good surface thermal extensibility, and improved heat dissipation efficiency.

[0005] The purpose of this utility model is achieved as follows:

[0006] A novel composite graphene heat sink includes a graphene heat sink body with multiple graphene heat sink fins on its surface, wherein at least a portion of the surface of the graphene heat sink fins is coated with a gold-plated layer.

[0007] The objective of this invention can also be achieved by the following technical measures:

[0008] As a more specific embodiment, the graphene heat sink body includes a graphene thermally conductive base and graphene heat dissipation fins integrally formed together. The graphene thermally conductive base includes a heat-receiving mounting surface and a main heat dissipation surface, and the graphene heat dissipation fins are disposed on the main heat dissipation surface.

[0009] As a further embodiment, the graphene thermally conductive base is provided with perforations, one end of which leads to the heated mounting surface and the other end of which leads to the main heat dissipation surface; the gold sputtering layer also extends to the inner wall of the perforations.

[0010] As a further embodiment, the main heat dissipation surface and the heat-receiving mounting surface are located on the upper and lower sides of the graphene thermally conductive base, respectively, and the upper end of the graphene heat dissipation fins is provided with a concave surface.

[0011] As a further option, a portion of the concave surface falls within the orthographic projection area at the center of the heated mounting surface.

[0012] As a further solution, multiple graphene heat dissipation fins are arranged in parallel to each other, with adjacent graphene heat dissipation fins spaced apart to form a heat dissipation channel that runs through both sides of the graphene heat sink body.

[0013] As a further embodiment, the heat dissipation channel is embedded with thermally conductive metal, which includes a shielding surface and an exposed surface. The shielding surface is in contact with the surface of the graphene heat dissipation fins, and the gold-plated layer extends from the surface of the graphene heat dissipation fins to the exposed surface of the thermally conductive metal.

[0014] As a further embodiment, a heat pipe is embedded in the heat dissipation channel, the heat pipe extends along the channel direction, and at least part of its surface is exposed and at least part of its surface is in contact with the surface of the graphene heat dissipation fins. The gold sputtering layer also extends from the surface of the graphene heat dissipation fins to the exposed surface of the heat pipe.

[0015] As a further embodiment, a heat pipe is also included, which extends laterally through the graphene heat dissipation fins and across the heat dissipation channel, with the gold-plated layer extending from the surface of the graphene heat dissipation fins to the exposed surface of the heat pipe.

[0016] As a further embodiment, the gold coating is an aluminum gold coating or a copper gold coating; the graphene heat sink body comprises graphene, carbon nanotubes and adhesive mixed and then injection molded or cast.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) The gold spray layer of this utility model is attached to the heat dissipation fins of the graphene heat sink body, so that the heat transferred to the surface of the heat dissipation fins is quickly flattened by the gold spray layer. Since the surface area of ​​the heat dissipation fins is large, the gold spray layer on its surface can also have an equally large area, so it achieves a good heat dissipation effect.

[0019] (2) The gold spraying layer of this utility model is a layer structure formed by spraying molten metal onto the heat dissipation fins and solidifying it. The metal and the surface of the heat dissipation fins are firmly bonded together, ensuring that the gold spraying layer and the surface of the heat dissipation fins have good adhesion, improving the heat transfer effect and increasing the structural strength of the heat dissipation fins.

[0020] (3) The graphene heat sink body of this utility model is covered with a gold spray layer to cover the heat sink fins. The thickness of the gold spray layer is controllable, which can avoid excessive thickness and thus have a significant impact on the overall weight of the product.

[0021] (4) The graphene thermal conductive base of this utility model is provided with a through hole that penetrates the heat-receiving mounting surface and the main heat dissipation surface. Since the heat-receiving mounting surface is mainly in contact with the components that need to dissipate heat, after the through hole, the heat of the components can be transferred from the gold spray layer on the wall of the through hole to the gold spray layer on the surface of the heat dissipation fins more quickly, so as to achieve large-area rapid cooling.

[0022] (5) The upper middle part of this utility model can be provided with a concave surface, which shortens the heat transfer distance from the heated mounting surface to the upper end of the heat dissipation fins and improves the heat transfer effect; moreover, since the gold spraying layer strengthens the product structure, the gold spraying layer also covers the concave surface, and the opening of the concave surface will not cause the product structure to weaken and break.

[0023] (6) The heat dissipation fins of this utility model can also be inlaid with heat-conducting metal strips or heat pipes, and the gold spray layer extends to the surface of the heat-conducting metal strips or heat pipes, so that the heat-conducting metal strips or heat pipes can be fixed with the heat dissipation fins, thereby improving the structural strength and heat conduction capacity. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the first embodiment of the present utility model.

[0025] Figure 2 for Figure 1 A schematic diagram of the AA cross-sectional structure.

[0026] Figure 3 for Figure 1 Schematic diagram of the BB cross-section structure.

[0027] Figure 4 This is a three-dimensional structural diagram of the second embodiment of the present utility model.

[0028] Figure 5 for Figure 4 A schematic diagram of the CC cross-section structure.

[0029] Figure 6 for Figure 4 Schematic diagram of the DD cross-sectional structure.

[0030] Figure 7This is a three-dimensional structural diagram of the third embodiment of the present utility model.

[0031] Figure 8 for Figure 7 Schematic diagram of the EE cross-section structure.

[0032] Figure 9 for Figure 8 Enlarged structural diagram at point F.

[0033] Figure 10 This is a cross-sectional structural diagram of the fourth embodiment of the present invention.

[0034] Figure 11 This is a schematic diagram of the end face structure of the fifth embodiment of this utility model.

[0035] Figure 12 This is a three-dimensional structural diagram of the sixth embodiment of the present utility model. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0037] Example 1, see Figures 1 to 3 As shown, a novel composite graphene heat sink includes a graphene heat sink body 1 with multiple graphene heat sink fins 12 on its surface, wherein at least a portion of the surface of the graphene heat sink fins 12 is coated with a gold-plated layer 2.

[0038] The graphene heat sink body 1 includes a graphene thermally conductive base 11 and graphene heat dissipation fins 12 integrally formed. The graphene thermally conductive base 11 includes a heat-receiving mounting surface 111 and a main heat dissipation surface 112, and the graphene heat dissipation fins 12 are disposed on the main heat dissipation surface 112.

[0039] As a further embodiment, the main heat dissipation surface 112 and the heat-receiving mounting surface 111 are located on the upper and lower sides of the graphene thermally conductive base 11, respectively, and the upper middle part of the graphene heat dissipation fin 12 is provided with a concave surface 13.

[0040] Multiple graphene heat dissipation fins 12 are arranged in parallel to each other, and adjacent graphene heat dissipation fins 12 are spaced apart to form heat dissipation channels 14 that run through both sides of the graphene heat sink body 1.

[0041] The gold coating layer 2 is an aluminum gold coating layer or a copper gold coating layer; the graphene heat sink body 1 is composed of graphene, carbon nanotubes and adhesive mixed and then injection molded or cast.

[0042] Example 2, see Figures 4 to 6As shown, a novel composite graphene heat sink includes a graphene heat sink body 1 with multiple graphene heat sink fins 12 on its surface, wherein at least a portion of the surface of the graphene heat sink fins 12 is coated with a gold-plated layer 2.

[0043] The graphene heat sink body 1 includes a graphene thermally conductive base 11 and graphene heat dissipation fins 12 integrally formed. The graphene thermally conductive base 11 includes a heat-receiving mounting surface 111 and a main heat dissipation surface 112, and the graphene heat dissipation fins 12 are disposed on the main heat dissipation surface 112.

[0044] The graphene thermally conductive base 11 is provided with a perforation 15, one end of the perforation 15 is connected to the heated mounting surface 111, and the other end of the perforation 15 is connected to the main heat dissipation surface 112; the gold sputtering layer 2 also extends to the inner wall of the perforation 15.

[0045] The main heat dissipation surface 112 and the heat-receiving mounting surface 111 are located on the upper and lower sides of the graphene thermally conductive base 11, respectively, and the upper end of the graphene heat dissipation fins 12 is provided with a concave surface 13. In this embodiment, the concave surface 13 is in the shape of a concave arc.

[0046] Multiple graphene heat dissipation fins 12 are arranged in parallel to each other, and adjacent graphene heat dissipation fins 12 are spaced apart to form heat dissipation channels 14 that run through both sides of the graphene heat sink body 1.

[0047] The gold coating layer 2 is an aluminum gold coating layer or a copper gold coating layer; the graphene heat sink body 1 is composed of graphene, carbon nanotubes and adhesive mixed and then injection molded or cast.

[0048] Example 3, see Figures 7 to 9 As shown, a novel composite graphene heat sink includes a graphene heat sink body 1 with multiple graphene heat sink fins 12 on its surface, wherein at least a portion of the surface of the graphene heat sink fins 12 is coated with a gold-plated layer 2.

[0049] The graphene heat sink body 1 includes a graphene thermally conductive base 11 and graphene heat dissipation fins 12 integrally formed. The graphene thermally conductive base 11 includes a heat-receiving mounting surface 111 and a main heat dissipation surface 112, and the graphene heat dissipation fins 12 are disposed on the main heat dissipation surface 112.

[0050] Multiple graphene heat dissipation fins 12 are arranged in parallel to each other, and adjacent graphene heat dissipation fins 12 are spaced apart to form heat dissipation channels 14 that run through both sides of the graphene heat sink body 1.

[0051] The heat dissipation channel 14 is embedded with a thermally conductive metal 3, which includes a shielding surface and an exposed surface. The shielding surface is in contact with the surface of the graphene heat dissipation fins 12, and the gold-plated layer 2 extends from the surface of the graphene heat dissipation fins 12 to the exposed surface of the thermally conductive metal 3. The thermally conductive metal 3 extends along the convection direction of the heat dissipation channel 14, allowing the heat of the thermally conductive metal 3 to be carried away by the convective air, thereby improving the heat dissipation effect.

[0052] As a further embodiment, the graphene thermally conductive base 11 is provided with a perforation 15, one end of the perforation 15 is connected to the heated mounting surface 111, and the other end of the perforation 15 is connected to the main heat dissipation surface 112; the gold sputtering layer 2 also extends to the inner wall of the perforation 15.

[0053] As a further embodiment, the main heat dissipation surface 112 and the heat-receiving mounting surface 111 are located on the upper and lower sides of the graphene thermally conductive base 11, respectively, and the upper end of the graphene heat dissipation fins 12 is provided with a concave surface 13.

[0054] The gold coating layer 2 is an aluminum gold coating layer or a copper gold coating layer; the graphene heat sink body 1 is composed of graphene, carbon nanotubes and adhesive mixed and then injection molded or cast.

[0055] The thermally conductive metal 3 is copper or aluminum (but is not limited to the above metals).

[0056] Example 4 differs from Example 3 in that: See [link to example]. Figure 10 As shown, the heat dissipation channel 14 is embedded with a heat pipe 4 (which is equivalent to replacing the heat-conducting metal in Embodiment 3). The heat pipe 4 extends along the channel direction and has at least a portion of its surface exposed and at least a portion of its surface in contact with the surface of the graphene heat dissipation fins 12. The gold sputtering layer 2 also extends from the surface of the graphene heat dissipation fins 12 to the exposed surface of the heat pipe 4.

[0057] Example 5 differs from Example 1 or 2 in that: see [link to example 1] Figure 11 As shown, it also includes a heat pipe 4, which extends laterally through the graphene heat dissipation fins 12 and across the heat dissipation channel 14. The gold sputtering layer 2 extends from the surface of the graphene heat dissipation fins 12 to the exposed surface of the heat pipe 4. Figure 11 The middle arrow indicates the flow direction of the heat-conducting fluid inside heat pipe 4.

[0058] Example 6 differs from any of Examples 1 to 5 in that: See Figure 12 As shown, only the upper end of the graphene heat dissipation fins 12 in the orthographic projection area at the center of the heated mounting surface 111 has a concave surface 13.

[0059] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A novel composite graphene heat sink, comprising a graphene heat sink body (1) with multiple graphene heat sink fins (12) on its surface, characterized in that: The graphene heat sink fins (12) have at least a portion of their surface covered with a gold-plated layer (2).

2. The novel composite graphene heat sink according to claim 1, characterized in that: The graphene heat sink body (1) includes a graphene thermally conductive base (11) and graphene heat dissipation fins (12) integrally formed. The graphene thermally conductive base (11) includes a heat-receiving mounting surface (111) and a main heat dissipation surface (112). The graphene heat dissipation fins (12) are disposed on the main heat dissipation surface (112).

3. The novel composite graphene heat sink according to claim 2, characterized in that: The graphene thermally conductive base (11) is provided with a perforation (15), one end of the perforation (15) leads to the heated mounting surface (111), and the other end of the perforation (15) leads to the main heat dissipation surface (112); the gold spray layer (2) also extends to the inner wall of the perforation (15).

4. The novel composite graphene heat sink according to claim 2, characterized in that: The main heat dissipation surface (112) and the heat-receiving mounting surface (111) are located on the upper and lower sides of the graphene heat-conducting base (11), respectively, and the upper end of the graphene heat dissipation fins (12) is provided with a concave surface (13).

5. The novel composite graphene heat sink according to claim 4, characterized in that: Part of the concave surface (13) falls into the orthographic projection area at the center of the heated mounting surface (111).

6. The novel composite graphene heat sink according to claim 2, 3, 4, or 5, characterized in that: Multiple graphene heat dissipation fins (12) are arranged in parallel to each other, and adjacent graphene heat dissipation fins (12) are spaced apart to form heat dissipation channels (14) that run through both sides of the graphene heat sink body (1).

7. The novel composite graphene heat sink according to claim 6, characterized in that: The heat dissipation channel (14) is embedded with a thermally conductive metal (3), which includes a shielding surface and an exposed surface. The shielding surface is in contact with the surface of the graphene heat dissipation fins (12), and the gold-plated layer (2) extends from the surface of the graphene heat dissipation fins (12) to the exposed surface of the thermally conductive metal (3).

8. The novel composite graphene heat sink according to claim 6, characterized in that: The heat dissipation channel (14) is embedded with a heat pipe (4). The heat pipe (4) extends along the channel direction and has at least a portion of its surface exposed and at least a portion of its surface in contact with the surface of the graphene heat dissipation fins (12). The gold spray layer (2) also extends from the surface of the graphene heat dissipation fins (12) to the exposed surface of the heat pipe (4).

9. The novel composite graphene heat sink according to claim 6, characterized in that: It also includes a heat pipe (4), which extends laterally through the graphene heat dissipation fins (12) and across the heat dissipation channel (14), and the gold sputtering layer (2) extends from the surface of the graphene heat dissipation fins (12) to the exposed surface of the heat pipe (4).

10. The novel composite graphene heat sink according to claim 1, characterized in that: The gold coating layer (2) is an aluminum gold coating layer or a copper gold coating layer; the graphene heat sink body (1) is composed of graphene, carbon nanotubes and adhesive mixed and then injection molded or cast.

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