CN1304809C - Connection method of heat pipe and cooling fins - Google Patents

Abstract

A method for connecting heat pipe with radiating fins includes plating heat-conducting medium layer on the joint of heat pipe and radiating fins, connecting radiating fins to the joint of heat pipe plated with heat-conducting medium layer, heating the heat-conducting medium layer to melt it between heat pipe and radiating fins, and cooling. The heat pipe is connected with the radiating fins through the steps, so that the contact effect and density between the heat pipe and the radiating fins are improved, the thermal resistance is reduced, and the characteristic that the heat pipe can transfer a large amount of heat is effectively exerted.

Description

Connection method of heat pipe and cooling fins

technical field

The invention relates to a method for connecting a heat pipe and a heat dissipation fin, in particular to a method for connecting a heat pipe and a heat dissipation fin by attaching a metal heat conduction medium between the heat pipe and the heat dissipation fin by means of an electroplating method.

Background technique

Due to the characteristics of high thermal conductivity, fast heat transfer, high heat transfer efficiency, light weight, simple structure and multi-purpose, heat pipes can transfer a large amount of heat without consuming power, so they are very suitable for the cooling needs of electronic products. In the past, when the heat pipes and heat dissipation fins were connected in series or combined, holes corresponding to the heat pipes were usually provided on each heat dissipation fin, and then the heat pipes were sequentially penetrated through the holes. In addition, in order to increase the contact density between the heat pipe and the perforations of the heat dissipation fins and reduce the thermal resistance, before the heat pipe penetrates, the heat pipe is first stained with a heat conducting medium such as solder paste, and then the heat pipe and the heat dissipation fins are connected to each other. To concatenate or combine.

Since the heat transfer medium used above is mostly viscose, when the heat pipe is stained with the heat transfer medium, it is not easy for the heat pipe to penetrate into the perforations of the heat dissipation fins, and if the viscous heat conduction medium overflows the perforations due to excess In addition, it not only affects the appearance of the product, but also is more likely to be contaminated with impurities and increase thermal resistance. However, if the coating amount of the heat-conducting medium is too small, the heat pipe cannot be closely contacted with the through-holes of each heat-dissipating fin. Therefore, in the past, it was not easy to accurately control the coating amount of the heat transfer medium on the joint between the heat pipe and the heat dissipation fin, and it was not easy to apply it evenly on the heat pipe, resulting in uneven product quality and many difficulties in manufacturing.

In view of this, the present inventor artificially improves and solves the defects in the above-mentioned prior art. After painstaking research and application of theories, he finally proposes an invention with a reasonable design and effectively improves the above-mentioned defects.

Contents of the invention

The main purpose of the present invention is to provide a method for connecting heat pipes and cooling fins, which uses electroplating to decompose the metal that can be used as a heat-conducting medium and make it adhere to the surface of the heat pipe, which solves the problem of the traditional heat-conducting medium being sticky. The defect that the glue is not easy to coat effectively guarantees the quality of the product and is convenient for manufacturing and processing.

In order to achieve the above object, the present invention provides a method for connecting a heat pipe and a cooling fin, the steps of which include:

a) Coating a metal heat conduction medium layer on the part where the heat pipe intends to join with the heat dissipation fin;

b) bonding the cooling fins to the part of the heat pipe coated with a heat-conducting medium layer; and

c) heating the heat conduction medium layer to make it melt between the heat pipe and the heat dissipation fins, and then cooling.

The method for connecting the heat pipe and the heat dissipation fin provided by the present invention can uniformly coat the heat conduction medium on the connection part of the heat pipe and the heat dissipation fin, thereby ensuring the quality of the product and facilitating manufacture and processing.

Brief description of the drawings

1 is a schematic flow diagram of a method for connecting a heat pipe and a heat dissipation fin according to an embodiment of the present invention;

Fig. 2 is a schematic view before the heat pipe and the cooling fins of the embodiment of the present invention are not bonded;

FIG. 3 is a schematic diagram of a heat pipe and a heat dissipation fin according to an embodiment of the present invention after bonding.

In the accompanying drawings, the list of parts represented by each label is as follows:

1- heat pipe

10-Heat conduction medium layer

2- cooling fins

20-perforation

Detailed ways

In order for those skilled in the art to further understand the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention.

FIG. 1 , FIG. 2 and FIG. 3 are the schematic flow chart of the present invention, the schematic diagram before the heat pipe and the cooling fin are not bonded, and the schematic diagram after bonding. The invention provides a method for connecting a heat pipe and a heat dissipation fin. The heat conduction medium is mainly covered on the heat pipe by an electroplating method to form a uniform metal coating layer that is easy to be accurately controlled, and then the heat dissipation fin is penetrated, and The metal coating layer is subjected to processing procedures such as welding and cooling, so that the heat pipe and the heat dissipation fin are joined. The steps of the present invention include:

a) Coating a layer of metal heat conduction medium layer 10 on the surface of the heat pipe 1 to be joined with the heat dissipation fins 2 (as shown in FIG. 2 ). In this step, the material of the thermally conductive medium layer 10 is preferably a metal material with a melting point lower than that of a good conductor such as copper, such as tin. Since electroplating is a process of using electric current to cover metal on the surface of another object and form a metal coating layer on the surface, it is possible to precisely control the formation of the thermally conductive medium layer 10 by controlling factors such as the length of electroplating time and the magnitude of the current. thickness, and the obtained coating layer is relatively uniform.

b) Bonding the heat dissipation fins 2 on the part of the heat pipe 1 coated with the heat conduction medium layer 10 (as shown in FIG. 3 ). In this step, each heat dissipation fin 2 is provided with a perforation 20 corresponding to the heat pipe 1, and the diameter of each perforation 20 is slightly larger than the outer diameter of the heat pipe 1, so that the heat pipe 1 can be inserted into each heat dissipation fin 2 in a tight fit. Perforation 20 in.

c) heating the heat conduction medium layer 10 to make it melt between the heat pipe 1 and the heat dissipation fins 2, and then cooling. In this step, the heat conduction medium 10 can be heated by low-temperature welding to avoid damage to the heat pipe 1 and the heat dissipation fins 2 .

The above steps flow is the connection method of the heat pipe and the cooling fins of the present invention.

Therefore, through the connection method of the heat pipe and the cooling fins of the present invention, the defect that the traditional heat conduction medium is viscous and difficult to coat can be effectively solved. The product manufactured by this method is not only more beautiful, easy to manufacture and process, and its evenly coated heat-conducting medium layer is more conducive to improving the tightness of contact between the heat pipe 1 and the heat dissipation fin 2, reducing thermal resistance and effectively The characteristic that the heat pipe 1 can transfer a large amount of heat is fully utilized.

To sum up, the present invention can indeed achieve the expected purpose of use, solve the defects in the prior art, has novelty and creativity, and fully meets the requirements of the invention patent application. The application is filed according to the Patent Law, please check and grant This invention is patented to protect the inventor's rights.

The above descriptions are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All transformations made by using the description of the present invention and the contents of the accompanying drawings, such as equivalent techniques and means, are equally included in the scope of the present invention. Inside.

Claims (5)

1. the method for attachment of heat pipe and radiating fin is characterized in that may further comprise the steps:

A) plate the metal conductive medium layer at the position that heat pipe is desired to engage with radiating fin;

B) radiating fin being bonded on described heat pipe is coated with on the position of heat-conducting medium layer; And

C) to the heating of described heat-conducting medium layer, make it be dissolved between heat pipe and the radiating fin after, cool off again.

2. the method for attachment of heat pipe as claimed in claim 1 and radiating fin is characterized in that in described step a), and the material of described heat-conducting medium layer adopts the fusing point metal material lower than copper.

3. the method for attachment of heat pipe as claimed in claim 2 and radiating fin is characterized in that in described step a), is tin as the material of described heat-conducting medium layer.

4. the method for attachment of heat pipe as claimed in claim 1 and radiating fin, it is characterized in that in described step b), offer on the described radiating fin and the corresponding perforation of described heat pipe, the aperture of described perforation is slightly larger than the outer tube diameter of described heat pipe, and described heat pipe is inserted in the perforation of described radiating fin in the tight fit mode.

5. the method for attachment of heat pipe as claimed in claim 1 and radiating fin is characterized in that in described step c), to the heating of described heat-conducting medium, adopts the mode of heating of low-temperature welding.

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