CN206614861U - Graphite material radiating fin - Google Patents

Abstract

A graphite material heat sink is arranged corresponding to a heat source and comprises a graphite heat conducting fin and a heat radiation layer. One surface of the graphite heat conducting sheet is used for absorbing heat energy generated by the heating source. The heat radiation layer covers the other side of the graphite heat conducting strip. The graphite heat-conducting strip absorbs heat energy from the heating source and conducts and diffuses rapidly, and then the graphite heat-conducting strip further diffuses rapidly in a heat radiation mode through the heat radiation layer.

Description

Graphite heat sink

technical field

The utility model relates to a radiator, in particular to a radiation radiator made of graphite material.

Background technique

Existing heat sinks are mainly made of metal heat sinks, which mainly absorb heat energy from a heat source through heat conduction, and then further radiate and radiate into the ambient air through heat convection. Considering the balance between the heat transfer characteristics, price and weight of metal materials, the metal materials commonly used in metal radiators are aluminum or copper, and the thermal conductivity (K) of aluminum is about 200W/(m·K), while The heat conductivity coefficient (K) of copper is about 400W/(m·K), which is relatively cheap among metal materials with better heat conduction efficiency. Traditional metal heat sinks achieve better heat convection efficiency by changing the structure of their fins, but the existing metal heat sinks are limited by the limit of the heat transfer characteristics of the metal itself, and it is difficult to make further progress.

In view of this, the inventor of the present invention aimed at the above-mentioned prior art, devoted himself to research and combined with the application of theories, and tried his best to solve the above-mentioned problems, which became the goal of the inventor's improvement.

Contents of the invention

The utility model provides a radiation heat sink made of graphite material.

The utility model provides a heat sink of graphite material, which is used for setting corresponding to a heat source, and comprises a graphite heat conduction sheet and a heat radiation layer. One side of the graphite heat conducting sheet is used for absorbing heat energy generated by the heat source. The heat radiation layer is covered on the other side of the graphite heat conduction sheet.

Preferably, an adhesive layer is interposed between the heat radiation layer and the graphite heat conducting sheet.

Preferably, the above-mentioned heat radiation layer is a sheet-shaped heat radiation material.

Preferably, the above-mentioned heat radiation layer is made of sheet-like graphene.

Preferably, the above-mentioned heat radiation layer is composed of a single sheet of graphene.

Preferably, the above-mentioned heat radiation layer is composed of a plurality of sheets of graphene jointed and extended.

Preferably, the heat radiation layer includes a fixed structure covering the graphite heat conducting sheet, and a plurality of heat radiation particles dispersed and embedded in the fixed structure.

Preferably, the above-mentioned heat radiation particles are graphene fragments.

Preferably, the above-mentioned heat radiation particles are carbon nanospheres.

Preferably, the above-mentioned fixing structure is a cured colloidal material.

The heat sink made of graphite material of the utility model can absorb heat energy from a heat source through its graphite heat conduction sheet and quickly diffuse it, and then further radiate it rapidly through a heat radiation layer in a heat radiation manner. Compared with the existing metal heat sink, it has better heat dissipation efficiency.

Description of drawings

FIG. 1 is a schematic diagram of a heat sink made of graphite material according to the first embodiment of the present invention.

FIG. 2 is a schematic diagram of a heat sink made of graphite material according to the second embodiment of the present invention.

Fig. 3 is a schematic diagram of a heat sink made of graphite material according to a third embodiment of the present invention.

Fig. 4 is a schematic diagram of another configuration of the graphite heat sink of the present invention.

【Description of main component symbols】

10 heat source

20 shells

100 graphite thermal pad

200 thermal radiation layers

210 Fixed structure

220 Heat Radiant Particles

300 adhesive layer

400 layers of protection

detailed description

Referring to Fig. 1, the first embodiment of the present utility model provides a heat sink made of graphite material, which is used to correspond to a heat source 10 for radiation heat dissipation, wherein the heat source 10 is for example an IC chip, a circuit board or other heat generating components . In this embodiment, the graphite heat sink of the present invention includes a graphite heat conduction sheet 100 and a heat radiation layer 200 .

Graphite heat conducting sheet 100 is flake graphite (Graphite). Graphene is a multi-layer laminated structure formed by hexagonal bonds of carbon atoms. It can be natural graphite or artificial graphite. The thermal conductivity of natural graphite (K ) is about 600W/(m·K) or more, while the thermal conductivity (K) of artificial graphite is about 1500W/(m·K) or more. One side of the graphite heat conducting sheet 100 is used to absorb heat energy generated by the heat source 10 , and conduct and diffuse the heat energy to various parts of the graphite heat conducting sheet 100 .

The heat radiation layer 200 covers the other side of the graphite heat conducting sheet 100 . In this embodiment, the heat radiation layer 200 is made of a sheet-shaped heat radiation material, which is preferably composed of a sheet-shaped graphene (Graphene). Graphene is a single hexagonal bond of carbon atoms. Layer planar key structure. Wherein, the sheet-shaped graphene may be a single sheet-shaped graphene, or may be composed of a plurality of sheet-shaped graphenes tiled together. An adhesive layer 300 is interposed between the heat radiation layer 200 and the graphite heat conduction sheet 100, and the heat radiation layer 200 is adhered and fixed on the graphite heat conduction sheet 100 by the adhesive layer 300, and the heat radiation layer 200 is covered with a protective layer 400 to protect The layer 400 is insulating and can be penetrated by heat radiation, and the protective layer 400 is preferably made of PET (polyethylene terephthalate). Since it is difficult for flake graphene to cover directly on the graphite heat conduction sheet 100 , the flake graphite is preferably firstly formed on the adhesive layer 300 or the protective layer 400 and then attached to the graphite heat conduction sheet 100 .

Referring to FIG. 2 , the second embodiment of the present invention provides a heat sink made of graphite material, which is arranged corresponding to a heat source 10 for radiation heat dissipation, wherein the heat source 10 is like an IC chip. In this embodiment, the graphite heat sink of the present invention includes a graphite heat conduction sheet 100 and a heat radiation layer 200 .

The graphite heat conduction sheet 100 is flake graphite, which can be natural graphite or artificial graphite. One side of the graphite heat conducting sheet 100 is used to absorb heat energy generated by the heat source 10 , and conduct and diffuse the heat energy to various parts of the graphite heat conducting sheet 100 .

The heat radiation layer 200 covers the other side of the graphite heat conducting sheet 100 . In this embodiment, an adhesive layer 300 is interposed between the heat radiation layer 200 and the graphite heat conduction sheet 100, and the heat radiation layer 200 is adhered and fixed on the graphite heat conduction sheet 100 by the adhesive layer 300, and the heat radiation layer 200 covers There is a protective layer 400 which is insulating and can be penetrated by heat radiation. The protective layer 400 is preferably made of PET (polyethylene terephthalate).

The heat radiation layer 200 includes a fixing structure 210 covering the graphite heat conducting sheet 100 and a plurality of heat radiation particles 220 dispersed and embedded in the fixing structure 210 . The fixing structure 210 is a cured colloidal material (such as glue or paint) and is preferably an insulating colloidal material to avoid conduction to the heat source and cause damage to the heat source. The heat radiation particles 220 can be graphene fragments, and the heat radiation The particles 220 may also be carbon nanospheres, which are spherical bonded structures composed of carbon atoms.

Its production method can firstly mix the heat radiation particles 220 with the uncured colloidal material and then disperse them evenly, and then cover the mixture on the adhesive layer 300 by spraying, coating or printing, and then paste it with the adhesive layer 300 It is constructed with a graphite heat conduction sheet 100 . Another way of making it can cover the protective layer 400 with the mixture of radiation particles and uncured colloidal material by spraying, coating or printing, and then spray, coat or print on the heat radiation layer 200 is covered with an adhesive layer 300 , and then the graphite heat conduction sheet 100 is attached to the adhesive layer 300 to form a structure.

Referring to FIG. 3 , the third embodiment of the present invention provides a heat sink made of graphite material, which is arranged corresponding to a heat source 10 for radiation heat dissipation, wherein the heat source 10 is like an IC chip. In this embodiment, the graphite heat sink of the present invention includes a graphite heat conduction sheet 100 and a heat radiation layer 200 .

The graphite heat conducting sheet 100 is flake graphite, which can be natural graphite or artificial graphite. One side of the graphite heat conducting sheet 100 is used to absorb heat energy generated by the heat source 10 , and conduct and diffuse the heat energy to various parts of the graphite heat conducting sheet 100 .

The heat radiation layer 200 covers the other side of the graphite heat conducting sheet 100 . In this embodiment, the heat radiation layer 200 includes a fixing structure 210 covering the graphite heat conducting sheet 100 , and a plurality of heat radiation particles 220 scattered and embedded in the fixing structure 210 . The fixing structure 210 is a cured colloidal material (such as glue or paint) and is preferably an insulating colloidal material to avoid conduction to the heat source and cause damage to the heat source. The heat radiation particles 220 can be graphene fragments, and the heat radiation The particles 220 may also be carbon nanospheres, which are spherical bonded structures composed of carbon atoms. Moreover, the heat radiation layer 200 is covered with a protective layer 400 , which is insulating and can be penetrated by heat radiation. The protective layer 400 is preferably made of PET (polyethylene terephthalate).

Its production method can firstly mix the heat radiation particles 220 with the uncured colloidal material to disperse evenly, and then cover the graphite heat conducting sheet 100 with the mixture by spraying, coating or printing.

In the foregoing embodiments, the heat sink made of graphite material of the present invention is attached to the heat source 10, and the graphite heat conduction sheet 100 contacts the heat source 10 and can absorb the heat energy generated by the heat source 10 through heat conduction. But the utility model is not limited thereto. Referring to FIG. 4 , the heat sink made of graphite material of the present invention can also be attached to the inner wall of the housing 20 of an electronic device. Preferably, the heat radiation layer 200 is attached to the inner wall of the non-metallic region of the housing 20 of the electronic device. The graphite heat conduction sheet 100 is arranged corresponding to the heat source 10 in the electronic device but not in contact with the heat source 10 , and absorbs heat energy generated by the heat source 10 by way of thermal radiation. Moreover, the heat radiation layer 200 can transmit the heat energy through the non-metallic region of the casing 20 to the outside of the electronic device in the form of heat radiation.

To sum up, the graphite heat sink of the present invention can absorb heat energy from the heat source 10 through the graphite heat conduction sheet 100 and rapidly spread it in the form of heat conduction through the graphite heat conduction sheet 100, and further use the heat radiation layer 200 to dissipate heat energy. The radiation pattern is rapidly diverging. Compared with the existing metal heat sink, it has better heat dissipation efficiency and can penetrate the obstruction of the plastic structure. Furthermore, it is light in size and can be used for more purposes, and it is cheap and easy to transport and install.

The above description is only a preferred embodiment of the utility model, and is not intended to limit the scope of protection of the patent of the utility model. Other equivalent changes using the spirit of the patent of the utility model should all belong to the scope of protection of the patent of the utility model. .

Claims (10)

1. A heat sink made of graphite material is configured to correspond to a heat source, and is characterized in that it comprises: a graphite heat conduction sheet, one side of which is used to absorb the thermal energy generated by the heat source; and a thermal radiation layer , covered on the other side of the graphite heat conduction sheet. 2 . The heat sink made of graphite material according to claim 1 , wherein an adhesive layer is interposed between the heat radiation layer and the graphite heat conduction sheet. 3 . 3. The heat sink made of graphite material according to claim 2, characterized in that the heat radiation layer is a sheet-shaped heat radiation material. 4. The heat sink made of graphite material according to claim 3, characterized in that the heat radiation layer is made of sheet graphene. 5. The heat sink made of graphite material according to claim 4, characterized in that the heat radiation layer is composed of a single sheet of graphene. 6 . The heat sink made of graphite material according to claim 4 , wherein the heat radiation layer is composed of a plurality of sheets of graphene that are mutually joined and extended. 7 . 7. The heat sink made of graphite material according to claim 1 or 2, wherein the heat radiation layer includes a fixing structure covering the graphite heat conducting sheet, and a plurality of heat radiation particles dispersed and embedded in the fixing structure. 8. The heat sink made of graphite material according to claim 7, characterized in that the above-mentioned heat radiation particles are graphene fragments. 9. The heat sink made of graphite material according to claim 7, characterized in that the above-mentioned heat radiation particles are carbon nanospheres. 10. The heat sink made of graphite material according to claim 7, characterized in that the fixing structure is a cured colloidal material.