CN2462543Y - Thin airfoil heat sink - Google Patents

Abstract

Thin wing section fin belongs to the heat abstractor field. The heat radiating sheet punched by aluminum alloy and the supporting sheet are arranged in a staggered and spaced manner and riveted to form a heat radiating sheet assembly, and the bottom of the heat radiating sheet assembly is combined with a metal sheet which has a higher heat conductivity and is made of copper metal to form the thin-wing-type heat radiating fin. Compared with the existing aluminum profile radiating fin, the aluminum profile radiating fin can increase the surface radiating area of the radiating fin, and can accelerate the heat source conduction speed, reduce the heat accumulation and delay phenomena caused by heat source conduction critical obstruction when being applied to the heat radiation of the power crystal, relatively effectively improve the heat radiation efficiency, and is suitable for the heat radiation of the power crystal, particularly the high-power crystal.

Description

Thin airfoil heat sink

The utility model belongs to the field of heat dissipation devices and relates to a thin airfoil heat sink.

Existing heat dissipation devices for power crystal heat dissipation mostly adopt extruded aluminum heat sinks. As shown in Figure 1, the heat sink 1 is composed of a flat plate-shaped substrate 11 at the bottom, and vertically on the top. It is composed of a plurality of cooling fins 12 arranged in parallel and spaced apart. The bottom surface of the substrate 11 of the heat sink 1 is attached to the surface of the power crystal (working heat source), so that the heat passes through the substrate to the fins, and the heat source is exported and dissipated by the enlarged heat dissipation surface area of the fins, so as to protect the power crystal. It works stably at normal temperature and improves its computing performance.

But above-mentioned radiator fin 1 is because of being made of aluminum profile, and the thickness of its radiator fin and the interval between two fins all can't be done very small, can't make it thin sheet shape to increase its contact area with air , so its heat dissipation efficiency is greatly limited; moreover, if the heat sink 1 needs to be made for a wider heat dissipation area, the size of its extrusion die must be increased, which increases the cost of making the die, which does not meet the economic requirements and cannot Meet the miniaturization requirements of commodities.

In addition, the thermal conductivity of copper in metals is much greater than that of aluminum. At present, aluminum alloys are often used in the industry to make radiators because the price is much lower than that of copper. However, under the heat dissipation requirements of some high-power crystals, the heat sink made of aluminum alloy may need to increase a lot of surface area to provide the required heat dissipation efficiency. This is because the thermal conductivity of aluminum alloy is low. In this process, a certain degree of heat accumulation and delay will be caused (that is, a certain degree of obstruction will be generated at the critical point where the heat source is conducted from the power crystal to the heat sink). However, under the current trend of commodity miniaturization, there is probably not enough space to provide a heat sink with a larger surface area. Therefore, the use of metals with high thermal conductivity (such as copper metal) to manufacture heat sinks seems to have become the only option for commodity miniaturization. At the same time, however, the resulting increased material costs must be taken into account.

The purpose of this utility model is to provide a thin airfoil heat sink, which can greatly increase the heat dissipation surface area in contact with the air, and can reduce the heat accumulation and delay caused by the critical obstruction of heat source conduction, and effectively improve its heat dissipation efficiency.

The technical solution to achieve the above object is: a thin airfoil heat sink, including several rows of heat dissipation fins, characterized in that it also includes a support sheet whose number matches the heat dissipation fins and a metal sheet that can be used as a substrate, and the heat dissipation fins The supporting sheet is alternately arranged at intervals, and each is provided with through holes and perforations corresponding to the positions, for the two to be riveted in series by rivets, and formed into a heat dissipation sheet assembly in a spaced stack. At the bottom of the heat dissipation sheet assembly, combined The metal sheet whose thermal conductivity is greater than that of the heat-dissipating sheet assembly can be used as the substrate.

A further technical solution for realizing the utility model is that the material of the heat dissipation sheet and the supporting sheet is aluminum alloy, and the material of the metal sheet is copper metal.

Fig. 1 is a structural schematic diagram of an existing customary aluminum extruded heat sink;

Fig. 2 is an exploded perspective view of Embodiment 1 of the present utility model;

Fig. 3 is a partially exploded perspective view of Embodiment 1 of the present utility model;

Fig. 4 is a combined exploded perspective view of Embodiment 1 of the utility model;

Fig. 5 is a side sectional view of Fig. 4 of the present utility model;

Fig. 6 is an exploded perspective view of Embodiment 2 of the present utility model.

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment 1: As shown in Figures 2, 3, and 4, the heat dissipation sheet assembly 2 is composed of several heat dissipation sheets 21 made of aluminum alloy, support sheets 22 and rivets 23, and the heat dissipation sheet 21 is made of an aluminum alloy plate. It is made into a sheet shape by punching with a die, and several perforations 212 are punched at the bottom end, and several flaps 211 turned inwards are punched and formed on the surface. The support piece 22 is also made of an aluminum alloy plate through die stamping, and is in the shape of a long strip. There are through holes 222 on the sheet body corresponding to the position of the heat dissipation sheet; A buckle groove 221. The rivets 23 can be riveted together through the through-holes 212 and through-holes 222 of the cooling fins 21 and the supporting sheet 22 to form a cooling fin assembly. The metal sheet 24 is made of copper stamping with a higher thermal conductivity than aluminum alloy. Both sides of the metal sheet 24 are formed with upwardly folded side pieces 241 . When assembling the above-mentioned heat sink assembly 2, several pieces of heat dissipation sheets 21 and several pieces of support sheets 22 are arranged in a staggered interval, and the punched holes 212 and 222 are all in a corresponding shape, so that the rivets can penetrate each The holes rivet and fix several heat dissipation sheets and support sheets to form a heat dissipation sheet assembly (rough blank of airfoil heat sink). After the above-mentioned components are ground and corrected, the metal sheet 24 can be assembled continuously. Before assembly, thermal conductive adhesive 25 can be applied to the bottom of the component or the top surface of the metal sheet (as shown in Figure 5), and then the metal sheet 24 is attached to the bottom surface of the heat dissipation sheet component, and the side buckle 242 is used to fasten it to the two supporting pieces 22 of the buckle groove 221 to form a fixed assembly.

Embodiment 2: Radiator assembly 21,22,23, composition and the assembling of sheet metal 24, can also adopt the mode of threaded connection, as shown in Figure 6, can make the surface of support sheet 22 on both sides of radiator assembly with several There are two screw holes 222, and the surface of the two side sheets 241 of the metal sheet 24 is correspondingly formed with via holes 243, which are connected and fixed by screws 244. In order to increase the connection strength of the screw 244 , corresponding punching holes can be punched on the surface of the heat sink 21 to lengthen the locking length of the screw 244 .

Due to the adoption of the above scheme, the utility model has the following characteristics compared with the existing related technology:

1. The utility model is used in the power crystal 3 (Fig. 5). Since the cooling fins can be extremely thin and the spacing can be extremely small, the number of cooling fins increases in the same use space, the cooling area increases, and the cooling power is greatly improved.

2. Because copper metal is used as the substrate, the overall efficiency of the radiator can be effectively improved, and the heat accumulation and delay caused by the critical obstruction of heat source conduction can be reduced. And because the amount of copper used is very small, only a thin piece, so it will not increase a lot of cost.

3. Since the heat dissipation sheet is assembled, it can be large or small according to the needs of the work. It is only necessary to change the number of assembled pieces, and there is no need to make molds of different specifications, thus greatly saving production costs. It is a very valuable tool major reforms.

Claims (9)

1, a kind of thin airfoil fin, include number row heat radiation thin slice, it is characterized in that, the support chip and one that also includes its quantity and heat radiation thin slice coupling can be used as the sheet metal of substrate, described heat radiation thin slice and support chip is interlaced is spaced, and respectively be shaped on the through hole and the perforation of position correspondence, be connected in series riveted for the two by rivet, be shaped to the heat radiation wafer assemblies that is the spacer stack shape, in this heat radiation wafer assemblies bottom, in conjunction with the above-mentioned sheet metal that can be used as its conductive coefficient of substrate greater than the heat radiation wafer assemblies.

2, thin airfoil fin according to claim 1 is characterized in that, is coated with between described sheet metal and the heat sink assembly in order to keep the two to contact closely smooth and to quicken its heat conducting heat-conducting glue.

3, thin airfoil fin according to claim 1, it is characterized in that, described both sides of foil is all made and is upwards rolled over the lateral plate that turns over, this lateral plate surface has the cramp that inwardly tiltedly turns over, and being interlocked in order to the catching groove with heat radiation wafer assemblies supported on both sides sheet surface forms combining of heat radiation wafer assemblies and sheet metal.

4, according to claim 1 or 3 described thin airfoil fin, it is characterized in that, respectively be shaped at least 2 perforation on the lateral plate that upwards folding turns over of the both sides of sheet metal.

5, thin airfoil fin according to claim 1 is characterized in that, the support chip surface in heat radiation wafer assemblies both sides, and the perforation on the corresponding sheet metal lateral plate is shaped on the screw for the screw connection of the two.

6, thin airfoil fin according to claim 1 is characterized in that, the support chip surface in heat radiation wafer assemblies both sides, and the perforation on the corresponding sheet metal lateral plate is shaped on the positioning jack of pegging graft for the latch of the two.

7, thin airfoil fin according to claim 1 is characterized in that, each sheet surface that dispels the heat has the little fin of the inside turnover of several punching presses formation.

8, thin airfoil fin according to claim 1 is characterized in that, the material of heat radiation thin slice and support chip is an aluminium alloy.

9, thin airfoil fin according to claim 1 is characterized in that, the material of sheet metal is the copper metal.

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