JP2006332393A - Water-cooled heatsink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-cooled heatsink, capable of being installed on a thin apparatus by reducing the heatsink in thickness. <P>SOLUTION: The water-cooled heatsink 1 is provided with a flat box-like tank body 2 having an opening surface, and a heat-receiving plate 3 capable of closing an opening portion of the tank body 2. A cooling water inlet port 9 and a cooling-water outlet port 10 are formed on the side surface of the tank body 2, and a cooling-water inlet port 12 and a cooling-water outlet port 13 are formed so as to be exposed to the outside on positions, corresponding to the ports 9 and 10 of the tank body 2 in the heat-receiving plate 3, a cooling-water inlet section 15 is formed of the port 9 of the tank body 2 and the port 12 of the heat-receiving plate 3, and a cooling-water outlet section 17 can be formed of the port of the port 10 of the tank body 2 and the port 13 of the heat-receiving plate 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a CPU (Central
This relates to a water-cooled heat sink for cooling processing units.

  Conventionally, in order to release the heat generated from the CPU of a notebook personal computer, it is common to attach an air-cooled heat sink to the CPU. However, with the recent improvement in the performance of personal computers, the amount of heat generated from the CPU increases. Accordingly, the air-cooled heat sink cannot sufficiently cool the CPU. Therefore, recently, a water-cooled heat sink having a larger heat release than the air-cooled heat sink has been adopted to cool the CPU.

In this type of conventional water-cooled heat sink, a cooling water flow path is formed inside by a heat receiving plate that is in close contact with the CPU and a box-shaped tank body. The tank body is connected to a cooling water inlet pipe and a cooling water outlet pipe so as to communicate with the cooling water flow path, and the cooling water flowing into the cooling water flow path through the cooling water inlet pipe is transferred to the CPU. After the heat generated from the water is absorbed, it flows out through the cooling water outlet pipe (see, for example, Patent Document 1).
JP 2002-170915 A

  However, in the above-described conventional water-cooled heat sink, when the cooling water inlet pipe and the cooling water outlet pipe are connected to the side surface of the tank body, it is difficult to reduce the thickness of the tank body because a certain thickness of the tank body must be secured. There was a problem.

  On the other hand, if the cooling water inlet pipe and the cooling water outlet pipe are connected to the top plate side of the tank body, a piping space for the cooling water inlet pipe and the cooling water outlet pipe is required above the tank body. There was a problem that the equipment could not be installed.

  The present invention has been made to solve the above-described problems, and is intended to provide a water-cooled heat sink that can be thinned and can be installed in a thin apparatus such as a notebook personal computer.

  The present invention is a water-cooled heat sink comprising a flat box-shaped tank body having an opening surface and a heat receiving plate capable of closing the opening of the tank body, and a cooling water inlet is provided on a side surface of the tank body. And a cooling water outlet portion, and the heat receiving plate has a cooling water inlet portion and a cooling water outlet portion on the outside at positions corresponding to the cooling water inlet portion and the cooling water outlet portion of the tank body. A cooling water inlet is formed by the cooling water inlet of the tank body and the cooling water inlet of the heat receiving plate, and the cooling water outlet of the tank main body and the cooling water of the heat receiving plate A cooling water outlet can be formed by the outlet portion.

  The cooling water inlet pipe and the cooling water outlet pipe connected to the cooling water inlet and the cooling water outlet, respectively, are formed by partially expanding the stopper portion, and the stopper portion is It is formed so as to be able to contact each peripheral portion of the water inlet and the cooling water outlet.

  According to the present invention, since the cooling water inlet and the cooling water outlet of the heat receiving plate are formed so as to bulge outward, the height of the tank body can be kept low. Therefore, it is possible to reduce the thickness of the water-cooled heat sink and to install it on a thin device such as a notebook computer.

  In addition, when stopper portions are formed on the cooling water inlet pipe and the cooling water outlet pipe, the stopper portions abut against the peripheral portions of the cooling water inlet and the cooling water outlet, so that the cooling water inlet and the cooling water outlet are cooled. Various excellent effects can be obtained, for example, the brazing property of the water inlet pipe and the cooling water outlet pipe can be improved, and airtightness can be improved and mass production can be achieved.

  The water-cooled heat sink according to the embodiment of the present invention will be described below with reference to FIGS. 1 is a plan view showing a water-cooled heat sink according to the present embodiment, FIG. 2 is a rear view showing the water-cooled heat sink, FIG. 3 is a front view showing the water-cooled heat sink, and FIG. 4 is a partial view of the water-cooled heat sink. FIG.

  The water-cooled heat sink 1 is made of aluminum, and has a tank body 2 having an opening surface, a heat receiving plate 3 capable of closing the opening of the tank body 2, and a cooling water flow formed inside by the tank body 2 and the heat receiving plate 3. The heat sink 3 is configured to be in close contact with the CPU (not shown) side of the notebook personal computer.

  The tank body 2 is formed into a flat rectangular box shape by pressing, and curved portions 6 are formed at four corners, and flanges 5 are formed at the outer peripheral portion. And the cooling water inlet part 9 and the cooling water outlet part 10 are provided in the side surfaces 7 and 8 which the tank main body 2 opposes, respectively, and the cooling water inlet 9 and the cooling water outlet 10 curve the eaves part 5. Thus, it is formed in a semi-cylindrical shape.

  The heat receiving plate 3 has a rectangular plate shape, and a mounting portion 11 for fixing to the CPU is formed on the outer periphery of the heat receiving plate 3 so as to protrude outward. Further, the heat receiving plate 2 is bent so that the cooling water inlet portion 12 and the cooling water outlet portion 13 bulge outward at positions corresponding to the cooling water inlet portion 9 and the cooling water outlet portion 10 of the tank body 2. The cooling water inlet 15 is formed so that the cooling water inlet pipe 14 is sandwiched between the cooling water inlet 9 of the tank body 2 and the cooling water inlet 12 of the heat receiving plate. A cooling water outlet 17 is formed so that the cooling water outlet pipe 16 is sandwiched between the outlet 10 and the cooling water outlet 13 of the heat receiving plate 3.

  The inner fin 4 is formed by bending a metal thin plate into a corrugated shape, is formed at a height that matches the height of the cooling water flow path, and its outer corner 18 is a curved portion of the tank body 2. 6 is formed so as to be able to come into contact with the inner surface of 6. Accordingly, the inner fin 4 is positioned and fixed at a predetermined position in the cooling water flow path by the top plate 19 and the heat receiving plate 3 of the tank body 2 and the inner surfaces of the curved portions 6 of the tank body 2. .

  In addition, the cooling water inlet pipe 14 and the cooling water outlet pipe 16 connected to the cooling water inlet 15 and the cooling water outlet 17, respectively, can come into contact with the peripheral portions of the cooling water inlet 15 and the cooling water outlet 17. The stopper portions 20 and 21 are partially enlarged in diameter, and the stopper portions 20 and 21 are formed so that the cooling water inlet pipe 14 and the cooling water outlet pipe 16 have no gap between the cooling water inlet 15 and the cooling water outlet 17, respectively. It is large enough to be connectable.

  In the water-cooled heat sink 1 having the above-described configuration, the cooling water flowing into the cooling water flow path from the cooling water inlet pipe 14 is circulated through the cooling water flow path while being stirred by the inner fins 4 to receive heat. After absorbing the heat generated from the CPU through the plate 3, it flows out through the cooling water outlet pipe 16. At this time, the inner fin 4 is provided in close contact with the top plate 19 and the heat receiving plate 3 of the tank body 2, and the cooling water flow path is set while the cooling water flowing through the cooling water flow path is stirred by the inner fin 4. Since it circulates, the heat generated from the CPU can be efficiently transferred to the cooling water, and the heat exchange efficiency can be improved.

  Thus, according to the water-cooled heat sink 1 according to the above-described embodiment, since the cooling water inlet portion 9 and the cooling water outlet portion 10 of the heat receiving plate 3 are formed so as to bulge outward, the tank body The height of 2 can be kept low. Therefore, the water-cooled heat sink 1 can be thinned and can be installed in a thin device such as a notebook personal computer. Further, since the stopper portions 20 and 21 of the cooling water inlet pipe 14 and the cooling water outlet pipe 16 abut against the peripheral portions of the cooling water inlet 15 and the cooling water outlet 17, the cooling water for the cooling water inlet 15 and the cooling water outlet 17 is provided. The brazing performance of the inlet pipe 14 and the cooling water outlet pipe 16 can be improved, and airtightness can be improved and mass production can be achieved.

  In the above embodiment, a partition plate can be installed in the cooling water flow path to form a plurality of paths. In this case, the cooling water flows through every corner of the cooling water flow path. Therefore, the heat exchange efficiency can be further improved.

  In addition, the cooling water inlet 15 and the cooling water outlet 17 can be provided at a plurality of locations as long as the installation space permits, and can be used as a refrigerant sealing port or an air vent.

  Furthermore, the shape of the attachment portion 11 can be variously changed, and may be formed so that it can be used as the heat receiving plate 3 by pressing.

  In the above-described embodiment, the case of cooling the CPU of the notebook personal computer has been illustrated and described. However, the object to be cooled by the heat sink 1 is not limited to the above-described CPU, but is a thyristor, a power capacitor, or the like. There may be.

It is a top view which shows the water cooling type heat sink which concerns on embodiment of this invention. It is a rear view which shows the water cooling type heat sink which concerns on embodiment of this invention. It is a front view which shows the water cooling type heat sink which concerns on embodiment of this invention. It is a side view which shows partially the water cooling type heat sink which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water cooling type heat sink 2 Tank main body 3 Heat receiving plate 9 Cooling water inlet part 10 Cooling water outlet part 12 Cooling water inlet part 13 Cooling water outlet part 14 Cooling water inlet pipe 15 Cooling water inlet 16 Cooling water outlet pipe 17 Cooling water outlet 20 Stopper Part 21 Stopper part

Claims (2)

A water-cooled heat sink comprising a flat box-shaped tank body having an opening surface, and a heat receiving plate capable of closing the opening of the tank body,
A cooling water inlet portion and a cooling water outlet portion are formed on a side surface of the tank body, and a cooling water inlet is provided on the heat receiving plate at a position corresponding to the cooling water inlet portion and the cooling water outlet portion of the tank body. The cooling water inlet is formed by the cooling water inlet portion of the tank body and the cooling water inlet portion of the heat receiving plate. A water-cooled heat sink, characterized in that a cooling water outlet can be formed by a water outlet part and a cooling water outlet part of the heat receiving plate. The cooling water inlet pipe and the cooling water outlet pipe connected to the cooling water inlet and the cooling water outlet, respectively, are formed by partially expanding a stopper portion, and the stopper portion has the cooling water inlet. The water-cooled heat sink according to claim 1, wherein the heat-cooled heat sink is formed so as to be able to contact each peripheral portion of the cooling water outlet.

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