JP2000196271A - Electronic component chiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve position holding property of corrugated fins by fixing a blower case to a heat radiating plate, utilizing legs inserted in mounting holes of the blower case, with the legs being formed in one body with the plate. SOLUTION: An Al alloy corrugated fin 2 is disposed on one surface of an Al alloy heat radiating plate 1 and brazed to this plate 1 into one body. A blower 3 is disposed, facing the corrugated fin 2, and covered with a blower case 4. The blower case 4 has mounting holes at the four corners, and legs 6 formed in one body by bending the radiating plate 1 are passed through the mounting holes and caulked in this state, so as to fix the blower case 4 to the radiating plate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device suitable for cooling electronic components such as a microprocessor unit which generates heat.

[0002]

2. Description of the Related Art Conventionally, as a cooling device for electronic parts, there has been known a cooling device in which a large number of fins are cut and raised from a heat radiating plate as disclosed in Japanese Patent Application Laid-Open No. 8-83873. However, in this conventional device, since the fins are formed integrally with the radiating plate, the radiating area of the fins cannot be so large, and the heat cannot be efficiently radiated.

[0003]

SUMMARY OF THE INVENTION In view of the above, the present invention is based on the premise that the amount of heat dissipation is increased by thermally connecting corrugated fins to a heat dissipation plate. However, since the corrugated fin is made of an extremely thin strip, there is a problem that it is easily deformed by an external force. Further, since the corrugated fin and the heat radiating plate are separate members, it is necessary to thermally couple the heat radiating plate to the heat radiating plate by brazing or the like.

Therefore, the present invention aims to protect the corrugated fins by devising the shape of the heat radiating plate.
It is another object of the present invention to make the thermal coupling between the corrugated fin and the heat radiating plate excellent, and to easily connect the corrugated fin to a blower case for mounting a blower for sending cooling air to the corrugated fin.

Another object of the present invention is to improve the position retention of the corrugated fin when the corrugated fin is thermally coupled to the heat radiating plate.

[0006]

According to the present invention, in order to solve the above-mentioned problems, the legs are integrally bent from the end of the plate toward the blower case. The bent portions of the legs are particularly located on both ends of the corrugated fin in the wave direction. Then, a leg integrally formed from the plate is inserted into a mounting hole of the blower case, and in this state, the blower case and the heat radiation plate are fixed using the leg.

[0007]

According to the present invention, since the legs are formed at both ends of the corrugated fin in the wave direction, both sides of the corrugated fin are held by the legs, and the positioning of the corrugated fin can be reliably performed. .

Further, since the blower case can be fixed using the legs of the heat radiating plate, the whole can be manufactured at low cost.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of an electronic component cooling device. In FIG. 1, reference numeral 1 denotes a heat radiation plate made of an aluminum alloy. This heat dissipation plate is formed by bending a plate material having a thickness of about 1 to 5 mm.

A corrugated fin also made of an aluminum alloy is disposed on one side of the heat radiating plate 1. The heat dissipation plate and the corrugated fin are integrally connected by brazing. Therefore, the heat radiation plate 1
In this method, a brazing material is clad on a surface facing the corrugated fin 2 in advance, and brazing is performed integrally in the filter in a state where the heat radiation plate and the corrugated fin are combined as shown in the figure.

A blower 3 is disposed at a position facing the corrugated fin 2. This blower is a small blower having a diameter of about 3 to 8 cm, and is rotationally driven by a DC brushless motor arranged at the center thereof. This brushless motor is a small motor of about 1 to 3 watts. The blower is covered by a blower case 4. Blower case is made of saturated polyester or AB
It is made of S resin or the like. The blower case 4 has mounting holes 5 at its four corners.

Two mounting feet 6 are integrally formed on both sides of the heat radiating plate 1 in the wave direction of the corrugated fins. And this bent foot 6
Is passed through the mounting hole 5 of the blower case 4 and is caulked in that state as shown in FIG. 1 to fix the blower case.

4 to 7 show another example of the present invention. Also in this embodiment, the blower case 4 is stopped by using a screw 10 for the leg 6 to which the heat radiation plate 1 extends integrally. However, in this case, not only four extra screws 10 are required, but also the heat radiation plate must be bent in a U-shape on both sides, and the female screw 11 to which the screws 10 are screwed must be formed. is there. Therefore, as a whole, the manufacturing cost is higher than that of the present invention shown in FIGS.

FIGS. 8 and 9 show still another embodiment of the present invention. In the illustrated example of FIG.
Is formed by caulking after penetrating. However, as shown in the example of FIG. 8, the legs 6 of the heat radiation plate may be caulked on the side surface and both surfaces of the blower case 4.

In the example of FIG. 9, the leg 6 of the heat radiation plate 1 presses the mounting hole 5 of the blower case 4 from the upper surface side.

Further, in the above-described example, the legs 6 are bent at only the four corners from the heat radiation plate 1. However, in order to protect the corrugated fins, the legs 6 are also provided at the center.
May be provided.

Further, in the above example, the plate 1 and the fin 2
Are joined by brazing, but may be joined by other means such as ultrasonic welding.

[0019]

As described above, according to the present invention, the blower case is fixed by using the legs integrally bent from the heat radiating plate and caulking or screwing the legs to the blower case. Therefore, the assembling cost can be reduced. In addition, since the legs formed by bending from the heat radiating plate are located at both ends of the corrugated fin in the wave direction, the corrugated fin can be protected. Furthermore, since the installation area of the corrugated fin can be widened, a sufficient heat radiation area can be secured,
Cooling performance is also improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a side view of the embodiment shown in FIG. 1;

FIG. 3 is a front view of the embodiment shown in FIG. 1;

FIG. 4 is a longitudinal sectional view showing another example of the present invention.

FIG. 5 is a side view of the example shown in FIG. 4;

FIG. 6 is a front view of the example shown in FIG. 4;

FIG. 7 is a perspective view of the example shown in FIG. 4;

FIG. 8 is a longitudinal sectional view showing another example of the present invention.

FIG. 9 is a longitudinal sectional view showing still another example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat dissipation plate 2 Corrugated fin 3 Blower 4 Blower case 5 Mounting hole 6 End

Claims (4)

[Claims] A metal heat radiating plate closely disposed to an electronic component; a corrugated fin thermally coupled to the heat radiating plate; and a blower disposed to face the corrugated fin and blowing cooling air toward the corrugated fin. And a blower case for holding the blower, wherein the heat radiating plate has leg portions bent toward the blower case to cover both ends of the corrugated fin in a wave shape. The electronic component cooling device, wherein the leg has a mounting hole through which the leg can pass, and the leg and the blower case are fixed to each other by an end surface of the leg. 2. The electronic component cooling device according to claim 1, wherein the blower case has a shroud function for guiding cooling air of the blower to the corrugated fin. 3. The electronic component cooling device according to claim 1, wherein the corrugated fin is formed by cutting and raising a louver through which cooling air can pass through the inside of the corrugated fin. 4. The heat radiation plate is formed of an aluminum alloy, and the corrugated fin is also formed of an aluminum alloy, and the heat radiation plate and the corrugated fin are integrally brazed or welded. An electronic component cooling device according to any one of claims 1 to 3.