HEAT SINK ASSEMBLY STRUCTURE

Description

This application claims the priority benefit of Taiwan patent application number 113140168 filed on Oct. 22, 2024, the disclosure of which is hereby incorporated by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates to a heat sink assembly structure, and more particularly, to a heat sink assembly structure capable of increasing the efficiency of bonding a heat sink to a base and improving the bonding process.

BACKGROUND OF THE INVENTION

Heat sinks are known to be either one-piece structures formed by extrusion, casting or machining, or combination structures that combine multiple cooling fins with a heat sink base. Combination type heat sinks are made by bonding cooling fins to a heat sink base. This combination type heat sinks are typically achieved by either bonding the cooling fins to the heat sink base and welding them together, or by engraving grooves on the surface of the heat sink base for the cooling fins to be embedded into.

However, the thickness of the cooling fins varies and the spacing between them is too small, making these cooling fins prone to interference when combining them with the heat sink base. This leads to difficulties in the manufacturing process, as it is not possible to smoothly combine the cooling fins with the heat sink base. Therefore, how to solve the interference problem when combining these cooling fins with the heat sink base is the most important issue at present.

SUMMARY OF THE INVENTION

In view of the foregoing considerations, the primary object of the present invention is to provide a heat sink assembly structure capable of improving the problem of interference when the cooling fins are combined with the heat sink base.

To achieve the above objective, the present invention provides a heat sink assembly structure including a base and cooling fins. The base has a bonding surface and a heat receiving surface, and the bonding surface is defined with grooves. The cooling fins each include a body portion and a bonding portion, wherein the body portion is provided with an airtight chamber and the bonding portion can be combined with the groove.

A feature of the present invention is that a differential section is provided between the body portion and the bonding portion, which causes the body portion and the bonding portion to be misaligned or asymmetric, so that when the cooling fins are bonded to the base, the problem of the cooling fins interfering with each other during installation can be improved by means of the differential section of the cooling fins.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein

FIG. 1 is a three-dimensional exploded view of a heat sink assembly structure of the first embodiment of the present invention; and

FIG. 2 is a schematic diagram of a combination structure of the heat sink assembly structure of the first embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The above objects of the present invention and its structural and functional features will be illustrated in accordance with the preferred embodiments of the accompanying drawings.

Please refer to FIG. 1 and FIG. 2. FIG. 1 is a three-dimensional exploded view of a heat sink assembly structure of the first embodiment of the present invention, and FIG. 2 is a schematic diagram of a combination structure of the heat sink assembly structure of the first embodiment of the present invention. As shown in the figures, the heat sink assembly structure includes a base 1 and a plurality of cooling fins 2.

Base 1 has a bonding surface 11 and a heat receiving surface 12 which is in contact with the heat source. The bonding surface 11 is characterized by the presence of a plurality of grooves 111. Each cooling fin 2 includes a body portion, which can be composed of two correspondingly laminated first sheet body 21 and a second sheet body 22, and the first sheet body 21 and the second sheet body 22 together define an airtight chamber 23. Each cooling fin 2 has a bonding portion 24 at one end of the cooling fin 2. The cooling fins 2 are embedded into the grooves 111 through the bonding portions 24, thus combining the cooling fins with the base 1. The present invention provides a differential section 25 (constructed by bending or inclining, etc.) between the body portion of the cooling fin 2 and the bonding portion (between the bonding portion 24 and the body portion with the airtight chamber 23). The differential section 25 permits for misalignment or asymmetry between the body portion with the airtight chambers and the bonding portion. Furthermore, the differential section 25 prevents interference between the cooling fins 2 when they are bonded to the base 1. Additionally, the inner surface of the airtight chamber 23 includes a capillary structure layer 26 and is filled with a working fluid 27.

The first sheet body 21 has a first groove 211 and the second sheet body 22 has a second groove 221. The first groove 211 and the second groove 221 together define the airtight chamber 23 when they correspondently cover each other. This construction method allows for the creation of a cooling fin 2 with an airtight chamber 23, with the objective of further enhancing the overall heat dissipation efficiency through the heat conduction method of two-phase flow vapor-liquid transition.

The cooling fins 2 are made of metal material or non-metal material, the metal material being any of gold, silver, copper, stainless steel, aluminium, copper alloy, aluminium alloy, titanium, titanium alloy, or a combination thereof, and the non-metal material being any of plastic, graphite, ceramic, or a combination thereof.

The cooling fins each in the present application is primarily composed of two independent first sheet body 21 and second sheet body 22, which are pre-formed by stamping or other mechanical processes and have multiple concave and convex parts. The concave and convex parts collectively constitute an airtight chamber 23, and the first sheet body 21 and the second sheet body 22 form the cooling fin 2 after stacking and sealing. As the outwardly projecting parts of the first sheet body 21 and the second sheet body 22 of the two neighboring cooling fins 2 will interfere with each other, a differential section 25 can be employed to prevent the cooling fins 2 from interfering with each other when they are combined with the base 1.

The present invention primarily comprises a structure that integrates cooling fins with chambers and a heat sink base. Moreover, the design of the differential sections 25 of the cooling fins, which may be inclined or bent, or the inclined setting of the joint between the heat sink base and the cooling fins, can address issues such as mutual interference between the cooling fins.

The present invention has been described with some preferred embodiments thereof and it is understood that many changes and modifications in the described embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.