JP2011125893A - Water-cooled cold plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a water-cooled cold plate in which displacement of a metal pipe is reduced, and cooling performance is stable. <P>SOLUTION: The water-cooled cold plate includes: a metal pipe having a straight part and a bent part having a meandering form; and a cold plate body into which the metal plate is cast so as to be formed into a flat rectangular shape. The bent part includes: a metal pipe in which the bent part is arranged at the outside of the cold plate body; and a pair of grooves provided to both the flat faces of the cold plate body with the straight part of the metal pipe held in-between along the straight part of the metal pipe so as to lock the metal pipe, and, the bottom face is arranged, in the width direction of the cold plate body, deeper than the central direction of the width than the outside diameter arrangement position of the metal pipe. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a water-cooled cold plate used for cooling electronic components on a printed circuit board.
More specifically, the present invention relates to a water-cooled cold plate in which the displacement of the metal pipe is small and the cooling performance is stable.

  With the recent increase in speed and density of electronic devices, the power density of electronic components in the printed board increases, and the printed board generates heat locally. In order to solve this problem, a water-cooled cold plate is used.

FIG. 4 is a diagram illustrating the configuration of the main part of a conventional example that is generally used, FIG. 5 is a diagram illustrating the use example of FIG. 4, and FIG. 6 is a diagram illustrating the operation of FIG.
In the figure, it is already practical to directly cool the electronic component 5 on the printed circuit board 4 by a water-cooled cold plate 3 in which a metal pipe 1 serving as a cooling water channel is provided in an aluminum water-cooled cold plate body 2. Has been.
A specific example in which the electronic component 5 on the printed circuit board 4 is directly cooled by the water-cooled cold plate 3 is shown in FIG.

Japanese Patent Laid-Open No. 05-074988 Japanese Patent Laid-Open No. 06-304739 JP 2002-057092 A Japanese Patent Laid-Open No. 2008-030054

Such an apparatus has the following problems.
In order to improve the cooling performance of the cold plate, it is necessary to increase the adhesion between the metal pipe and the aluminum cold plate body. As a method of increasing the adhesion, the pipe is installed in the mold and the molten aluminum is used. There is a manufacturing method of casting.

However, in this manufacturing method, the pipe bending portion 1a is opened as shown in FIG. 6 (a) or the pipe bending portion 1a is closed as shown in FIG. 6 (b) due to the influence of heat when casting the pipe. Or pipe displacement.
For this reason, it is not suitable for pipes with strict position accuracy.
And since the position of a pipe is not stabilized, cooling performance is not stabilized.

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a water-cooled cold plate in which the displacement of the metal pipe is small and the cooling performance is stable.

In order to achieve such a problem, in the present invention, in the water-cooled cold plate according to claim 1,
A water-cooled cold plate comprising a meandering metal pipe having a straight portion and a bent portion, and a cold plate body formed into a flat rectangular shape by casting the metal pipe therein. A metal pipe disposed on the outside of the cold plate body, and both planes of the cold plate body sandwiching the straight portion of the metal pipe along the straight portion of the metal pipe so as to lock the metal pipe And a pair of grooves each having a bottom surface disposed deeper in the width direction of the cold plate body than the position of the outer diameter of the metal pipe in the width direction of the metal pipe.

In the water-cooled cold plate according to claim 2 of the present invention, in the water-cooled cold plate according to claim 1,
It is characterized by having a bent portion of a metal pipe for connecting cold plate bodies having different heights.

According to claim 1 of the present invention, there are the following effects.
A pair of grooves are provided along the straight part of the metal pipe so as to lock the metal pipe, so that the metal pipe can be held by the mold and the metal pipe is displaced. And a water-cooled cold plate with a stable cooling performance can be obtained.
The bent part of the pipe, which is easily affected by the heat of the cast metal, is located outside the cold plate body, making it difficult for the bent part of the pipe to open and close, reducing the displacement of the metal pipe, and improving the cooling performance. Water-cooled cold plate that is easy to stabilize is obtained.

According to claim 2 of the present invention, there are the following effects.
Since the bent part of the metal pipe is arranged outside the cold plate body, it is possible to easily connect the cold plate bodies having different heights at the bent part. A water-cooled cold plate that can be easily cooled by two cold plates is obtained.

It is principal part structure explanatory drawing of one Example of this invention. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the other Example of this invention. It is principal part structure explanatory drawing of the prior art example generally used conventionally. It is principal part structure explanatory drawing of the usage example of FIG. It is operation | movement explanatory drawing of FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIGS. 1A and 1B are explanatory views of the main configuration of an embodiment of the present invention, in which FIG. 1A is a plan view and FIG. 1B is a side view.
In the figure, the same symbol structure as in FIG. 4 represents the same function.
Only differences from FIG. 4 will be described below.

In FIG. 1, the metal pipe 11 has a straight portion 111 and a bent portion 112 and has a meandering shape.
The cold plate body 12 is formed in a flat rectangular shape by casting a metal pipe 11 therein.
Here, the bent portion 112 of the metal pipe 11 is disposed outside the cold plate body 12.

  The pair of grooves 13 are provided on both planes of the cold plate body along the straight line portion 111 of the metal pipe so as to lock the metal pipe 11, respectively, In the width direction of the cold plate body 12, it is disposed deeper in the center direction of the width than the outer diameter arrangement position of the metal pipe 11.

In the above configuration, in order to prevent the metal pipe 11 from being displaced, meat around the cast portion of the metal pipe 11 of the cold plate body 12 is thinned by the pair of grooves 13, and the metal pipe 11 is substantially formed by a mold. It has a structure to suppress.
Further, the bent portion 112 of the metal pipe 11 is disposed outside the cold plate main body 12 so that the bent portion 112 of the metal pipe 11 does not open or close due to the influence of the heat of the molten casting.

  As a result, a pair of grooves 13 are provided along the straight portion 111 of the metal pipe 11 so as to lock the metal pipe 11, so that the metal pipe 11 is used as a mold. A water-cooled cold plate can be obtained that can be suppressed, the displacement of the metal pipe 11 can be reduced, and the cooling performance is easy to stabilize.

  Since the bent portion 112 of the pipe which is easily affected by the heat of the molten casting is disposed outside the cold plate body 12, the bent portion 112 of the metal pipe 11 becomes difficult to open and close, and the metal pipe 11 is misaligned. Can be reduced, and a water-cooled cold plate with a stable cooling performance can be obtained.

FIGS. 2A and 2B are explanatory views of the main configuration of another embodiment of the present invention, in which FIG. 2A is a plan view and FIG. 2B is a side view.
Since it is easy to make the arrangement position of the metal pipe 11 accurate, a water-cooled cold plate that can easily improve the cooling performance can be obtained by increasing the number of embedded metal pipes as shown in FIG.

FIGS. 3A and 3B are explanatory views of the main configuration of another embodiment of the present invention, in which FIG. 3A is a plan view and FIG. 3B is a side view.
In FIG. 3, the bent portion 113 of the metal pipe 11 connects the cold plate bodies 121 and 122 having different heights by bending obliquely in this case.

  As a result, since the bent portion 113 is disposed outside the cold plate main bodies 121 and 122, the cold plate main bodies 121 and 122 having different heights can be easily connected to each other at the bent portion. A water-cooled cold plate that can easily cool the electronic components of the printed circuit board with one cold plate 122 is obtained.

The above description merely shows a specific preferred embodiment for the purpose of explanation and illustration of the present invention.
Therefore, the present invention is not limited to the above-described embodiments, and includes many changes and modifications without departing from the essence thereof.

DESCRIPTION OF SYMBOLS 1 Metal pipe 1a Bending part 2 Water cooling type cold plate main body 3 Water cooling type cold plate 4 Printed circuit board 5 Electronic component 11 Metal pipe 111 Linear part 112 Bending part 113 Bending part 12 Cold plate main body 121 Cold plate main body 122 Cold plate main body 13 A pair of Groove 131 bottom

Claims (2)

A metal pipe having a straight portion and a bent portion and having a meandering shape;
A water-cooled cold plate comprising a cold plate main body formed into a flat rectangular shape by casting the metal pipe therein,
A metal pipe in which the bent portion is disposed outside the cold plate body;
The metal plate is provided on both planes of the cold plate body along the straight portion of the metal pipe so that the metal pipe is locked, and the bottom surface is provided in the width direction of the cold plate body. A pair of grooves arranged deeper in the center direction of the width than the outer diameter arrangement position of the pipe;
A water-cooled cold plate characterized by comprising: The water-cooled cold plate according to claim 1, further comprising a bent portion of a metal pipe that connects cold plate bodies having different heights.

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