JP2008306063A - Heat dissipation structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat dissipation structure in which a heat-receiving member is thermally connected to a heat dissipation member with a three-dimensional movability, and a durability of enduring a repetitive use is excellent. <P>SOLUTION: This heat dissipation component having a rotating structure comprises: a heat pipe having a part connected thermally to a heating component and another part provided with a spherical working part; and the heat dissipation member which has a joint part comprising a spherical portion corresponding to the spherical working part in each of a plurality of sheet members having a substantially L-letter shape, respectively, for housing the spherical working part slidably so as to sandwich the spherical working part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a part used for a heat sink for radiating heat of various electric / electronic parts and the like, and more particularly to a technique using a heat pipe.

  Various heat sinks using heat pipes have been proposed and put into practical use in order to cool heat-generating electrical / electronic components such as semiconductor modules mounted on various devices. One of the advantages of using a heat pipe is that the heat of the electric / electronic component to be radiated can be moved to another place and radiated to the outside at that place.

  For example, a part to be cooled of an electric / electronic component mounted on a personal computer is usually installed inside the personal computer, and therefore it may not be desirable to dissipate heat around the electric / electronic component. That is, when the electric / electronic component is mounted in the casing of the apparatus, there is a problem that heat is trapped in the casing when heat is dissipated around the electric / electronic component.

  Therefore, to achieve efficient cooling, it is necessary to carry heat to the outside of the container. Therefore, the following structure has been proposed and put into practical use as a typical heat sink using a heat pipe. That is, a heat receiving member (metal plate or the like) is thermally connected to a component to be cooled mounted inside the device, a heat receiving portion of a heat pipe is connected to the heat receiving member, and a heat radiating portion of the heat pipe is connected to, for example, an external device Or it is the structure etc. which are connected to heat radiating members, such as the fin for heat radiation installed in the exterior vicinity.

By the way, the component to be cooled mounted inside the device may be attached to the device or the fin for heat dissipation in a movable state. As an example, there is a case where a heat generating component such as an IC chip is mounted on the main body side (keyboard side) of a notebook personal computer, and the heat is dissipated to the outside through the openable display portion.
Furthermore, a structure in which some kind of sliding part is provided and the heat of the heat generating component is transmitted to the heat radiation fin via the sliding part has been proposed. For example, there may be a structure in which the surface of the heat pipe container is used as a sliding portion and heat is transferred from another heat transfer block or the like directly to the heat pipe via the sliding portion. In this case, due to the repeated sliding operation, the thermal resistance gradually increases, and as a result, the heat dissipation performance decreases according to the degree of use.

  The same applies to the sliding part by covering the heat pipe with a sleeve. In addition, when the container of the heat pipe is used as a sliding part, it may cause the destruction of the container. In order to reduce the thermal resistance of the sliding portion, there is also a method of interposing heat transfer grease or the like. However, due to the nature of grease, it is easy for aging and alteration to occur, and grease is also reduced by repeated sliding.

  In addition, as a heat pipe application technique in which two heat pipes are connected and the positional relationship between the heat receiving member and the heat radiating member is movable or adjustable, JP-A-11-173773 (Patent Document 1), and Examples include the structure described in Japanese Utility Model Publication No. 2-62274 (Patent Document 2). FIG. 5 is a view showing a heat dissipation structure disclosed in Japanese Patent Laid-Open No. 11-173773. As shown in FIG. 5, the conventional heat dissipation structure is formed by connecting a plurality of heat pipes using a heat pipe with a universal joint.

The structure described in Patent Document 2 is such that separate heat pipes are attached to the fitting body and the connector main body, and the fitting body and the connector main body are tightened and fixed with screws and nuts. Therefore, although the structure is different from the structure in which the heat pipes are movably connected, if necessary, the position of the two heat pipes can be changed by loosening the screws and nuts, changing the position, and fixing them again. Adjustment is possible.
Japanese Patent Laid-Open No. 11-173773 Japanese Utility Model Publication No. 2-62274

  In the above-described conventional heat dissipation structure, two heat pipes are movably connected, and the heat receiving member and the heat dissipation member connected to each of them are moved. However, all of them are only movable with respect to the heat receiving member within a plane where the heat radiating member is located. Therefore, it could not be used for applications that require a movable state with a higher degree of freedom.

  Accordingly, an object of the present invention is to provide a heat radiating component in which a heat receiving member and a heat radiating member are thermally connected with three-dimensional mobility and can freely rotate even in a narrow space.

The inventor has intensively studied to solve the above-mentioned conventional problems. As a result, it has been found that by arranging a spherical heat dissipating part between the heat generating part and the heat dissipating part, a structure that can freely rotate in a narrow space is realized.
The present invention has been made based on the research results described above.

In the first aspect of the heat dissipation component having the rotating structure of the present invention, a heat pipe in which a heat generating component is thermally connected to a part and a spherical processed part is provided to the other part,
Each of the substantially L-shaped plate members includes a spherical portion corresponding to the spherical processed portion, and a heat radiating member having a joint portion slidably housed so as to sandwich the spherical processed portion. A heat dissipating part having a rotating structure.

  In a second aspect of the heat dissipating part having a rotating structure according to the present invention, the joint portion includes the spherical portion and a cylindrical portion, and the cylindrical portion is separated from the spherical portion. It is a heat radiating component having a rotating structure with a large diameter at the end.

    According to a third aspect of the heat dissipating part having the rotating structure of the present invention, the spherical processed portion of the heat pipe is deformed into a spherical shape by contracting a part of the end of the heat pipe. It is a heat dissipation component.

  According to a fourth aspect of the heat dissipating component having the rotating structure of the present invention, the spherical processed portion of the heat pipe is deformed into a spherical shape by contracting a portion other than the end portion of the heat pipe. This is a heat dissipation component.

  According to the heat dissipating part having the rotating structure of the present invention, since the spherical heat dissipating part is disposed between the heat generating part and the heat dissipating part, it is possible to realize a structure that can freely rotate even in a narrow space. In addition, there are only two places on the surface of the heat dissipating part that are thermally connected, and the contact area can be increased by increasing the radius of curvature of the spherical surface as much as space permits, so the contact thermal resistance can be lowered. .

An embodiment of a heat dissipation component having a rotating structure of the present invention will be described with reference to the drawings.
One aspect of the heat dissipating part having the rotating structure of the present invention is a heat pipe in which a heat generating part is thermally connected to a part and a spherical processed part is provided to the other part,
Each of the substantially L-shaped plate members includes a spherical portion corresponding to the spherical processed portion, and a heat radiating member having a joint portion slidably housed so as to sandwich the spherical processed portion. A heat dissipating part having a rotating structure.
The plurality of substantially L-shaped plate members are, for example, two plate members. Three or four plates may be used. The spherically processed portion may be, for example, one end portion or an intermediate portion of the heat pipe.

  FIG. 1 is a cross-sectional view illustrating one embodiment of a heat dissipation component having a rotating structure according to the present invention. In the embodiment shown in FIG. 1, the plurality of generally L-shaped plate members are composed of two plate materials. Furthermore, the spherical processed part is formed at one end of the heat pipe. As shown in FIG. 1, a heat radiating component 40 having a rotating structure of this aspect has a heat pipe 26 in which a heat generating component (not shown) is thermally connected in part and a spherical processed portion 17 is provided at one end. And radiating members 4-1 and 4-2 having spherical portions 15-1 and 15-2 corresponding to the spherical processed portion 17 and having joint portions 18 for slidably storing the spherical processed portion 17; It has.

  That is, the heat radiating members 4-1 and 4-2 having the joint portion 18 are two plate-like members having the same shape including the bottom surface portions 16-1 and 16-2 and the spherical portions 15-1 and 15-2. It is made up of. The spherical portions 15-1 and 15-2 of the plate-like member face each other, and the spherical processed portion 17 of the heat pipe 16 is slidably accommodated therein. For example, an opening is formed in a part on the heat pipe side of the spherical portions 15-1 and 15-2 of the plate-like member, and the heat pipe is indicated by an arrow in a state where the spherical processed portion is slidably accommodated. Thus, it can move freely in three dimensions. The size of the opening can be appropriately designed in consideration of the desired thermal contact area to be secured and the degree of movement. The bottom surface portion may be any shape that forms a circle or a rectangle by combining two plate materials as desired.

  The heat of the heat-generating component thermally connected to one end (not shown) of the heat pipe evaporates the working fluid in the heat-absorbing portion of the heat pipe, and the evaporated working fluid is formed at the other end of the heat pipe. It moves toward the spherical processed part 17 which is a heat radiating part. The heat moved to the spherical processed portion 17 moves to the spherical portions 15-1 and 15-2 of the plate-like members to be thermally connected, and the working fluid is condensed and returned to the liquid state. The heat moved to the spherical portions 15-1 and 15-2 of the plate-like member moves to the bottom surface portions 16-1 and 16-2 and is radiated. As described above, by making the end of the heat pipe spherical, the heat pipe moves freely in three dimensions.

  FIGS. 2 to 4 show examples in which a spherical processed portion is formed on a heat pipe. As shown in the figure, all parts except a part or part of a straight pipe are contracted by pressing, swaging, or rolling to make a predetermined part spherical. In the embodiment shown in FIG. 2, a spherical processed portion 17 is formed by reducing a part of a straight pipe by press working. A main body portion 26 serving as a heat pipe main body and a spherical processed portion 17 are connected by a neck portion 27 which is constricted. The constricted neck portion 27 increases the movable angle of the spherical processed portion, and facilitates the three-dimensional movement of the heat pipe.

In the embodiment shown in FIG. 3, a die (mold) 28 is used to move the mold from one end portion of the heat pipe 26 toward the other end portion by swaging, and the end portion is spherical. A processed portion 17 is formed.
In the embodiment shown in FIG. 4, a die (die) 28 is used to move the die from both ends of the heat pipe 26 toward the center portion by swaging, so that a spherical portion is formed at the center portion. 17 is formed.
In the mode shown in FIGS. 3 and 4, the spherical processed portion is larger than the heat pipe body, the contact area of the sliding portion of the joint portion is increased, and the thermal conductivity is increased.

  As described above, according to the heat dissipating part having the rotating structure of the present invention, since the spherical heat dissipating part is disposed between the heat generating part and the heat dissipating part, a structure that can freely rotate in a narrow space can be realized.

FIG. 1 is a cross-sectional view illustrating one embodiment of a heat dissipation component having a rotating structure according to the present invention. FIG. 2 shows an example in which a spherical processed portion is formed on a heat pipe. FIG. 3 shows an example in which a spherical processed portion is formed on a heat pipe. FIG. 4 shows an example in which a spherical processed portion is formed on a heat pipe. FIG. 5 is a diagram illustrating a conventional heat dissipation component.

Explanation of symbols

4-1, 4-2 Heat Dissipation Member 15-1, 15-2 Spherical Part 16-1, 16-2 Bottom Surface Part 17 Spherical Processed Part 18 Joint Part 26 Heat Pipe 28 Mold 40 Heat Dissipating Part Having a Rotating Structure

Claims (4)

A heat pipe in which a heat-generating part is thermally connected to a part and a spherical processed part is provided to the other part,
Each of the substantially L-shaped plate members includes a spherical portion corresponding to the spherical processed portion, and a heat radiating member having a joint portion slidably housed so as to sandwich the spherical processed portion. , Heat dissipation component with rotating structure.   2. The rotation according to claim 1, wherein the joint portion includes the spherical portion and a cylindrical portion, and the diameter of the cylindrical portion widens toward the end in a direction away from the spherical portion. Heat dissipation component with structure.   The heat dissipating part having a rotating structure according to claim 1 or 2, wherein the spherical processed portion of the heat pipe is deformed into a spherical shape by contracting a part of a terminal of the heat pipe. The heat dissipating part having a rotating structure according to claim 1 or 2, wherein the spherical processed portion of the heat pipe is deformed into a spherical shape by contracting a portion other than the end portion of the heat pipe.

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