JP7247425B1 - heat sink - Google Patents

Abstract

It can prevent corrosion in the part where the base part of the heat pipe contacts with the container of the heat pipe due to moisture such as rainwater and humidity. provide a heat sink. a base portion to which a heating element is thermally connected, a heat radiating fin provided on the surface of the base portion, a heat pipe extending in a plane direction of the base portion provided in an internal space of the base portion; and a sealing member that seals the internal space of the base portion, the sealing member being provided in the internal space of the base portion so as to face the longitudinal end portion of the heat pipe.

Description

The present invention relates to a heat sink provided with a heat pipe in an internal space formed in a base portion to which a heating element is thermally connected.

2. Description of the Related Art As electronic equipment becomes more sophisticated, heat generating elements such as electronic components are mounted at high density inside the electronic equipment. 2. Description of the Related Art As a means for cooling a heating element such as an electronic component, there is a case where a heat sink is used in which a heat radiation fin is provided on a base portion to which the heating element is thermally connected. As electronic devices become more sophisticated, the amount of heat generated by heat generating elements such as electronic components is increasing, and it is becoming more and more important to improve the cooling performance of heat sinks.

In order to improve the cooling performance of the heat sink, it is necessary to improve the fin efficiency of the radiation fins provided on the heat sink. Therefore, heat pipes are provided along the planar direction of the base portion of the heat sink to transport the heat from the heating element to the area of the base portion where the radiation fins are provided. By using a heat pipe to transport the heat from the heating element to the area of the base where the heat radiating fins are provided, the thermal load of the plurality of heat radiating fins provided on the base is made uniform, and the fins of the heat radiating fins improving efficiency.

In providing the heat pipe in the base portion of the heat sink, it is necessary to improve the thermal connectivity between the base portion and the heat pipe. Therefore, a groove is provided on the surface of the base portion, and a narrow width portion having a narrow groove width is provided on the opening side of the groove, and a wide width groove having a wider groove width than the narrow width portion is provided on the groove bottom side than the narrow width portion. The heat pipe inserted into the groove and protruding from the narrow width portion is pressurized toward the groove bottom to expand and deform the diameter of the heat pipe in the groove width direction, thereby forming the outer peripheral surface of the heat pipe on the inner surface of the groove. A heat pipe has been proposed in which the heat pipe is joined to the groove by pressing the heat pipe (Patent Document 1).

On the other hand, heat sinks are mounted not only on equipment installed indoors, but also on equipment installed outdoors such as communication equipment. However, in the heat sink of Patent Document 1, in which the heat pipe is joined to the groove provided on the surface of the base portion, the heat pipe is exposed from the base portion. There has been a problem that moisture such as humidity may cause corrosion in the portion where the container and the base portion of the heat pipe are in contact. In particular, if the metal material that forms the heat pipe container and the metal material that forms the base are different, moisture such as rainwater and humidity accelerates galvanic corrosion of different metals, making the heat pipe container more likely to corrode. I had a problem.

Further, in the heat sink of Patent Document 1, in which the heat pipe is joined to the groove provided on the surface of the base portion, the heat pipe is exposed from the base portion, so there is room for improvement in the thermal connectivity between the base portion and the heat pipe. was there.

In addition, in order to improve heat radiation characteristics and electromagnetic wave shielding properties for heat generating elements such as electronic parts, it is required to improve the contact of the base part of the heat sink with the entire board on which the heat generating elements such as electronic parts are mounted. may be In order to improve the contactability of the base portion with the entire substrate, the surface of the base portion may be formed with unevenness in a shape corresponding to the shape of a component such as a heating element mounted on the substrate. However, in Patent Document 1, since the heat pipe is joined to the surface of the base portion, the arrangement of the heat pipe is restricted by the unevenness formed on the surface of the base portion. I had a problem with it.

JP 2010-112656 A

In view of the above circumstances, the present invention is capable of preventing corrosion in the portion where the container of the heat pipe and the base portion are in contact with each other due to moisture such as rainwater and humidity, and has excellent thermal connectivity between the base portion and the heat pipe. An object of the present invention is to provide a heat sink with improved flexibility in arranging heat pipes.

The gist of the configuration of the present invention is as follows.
[1] a base portion to which the heating element is thermally connected;
heat radiation fins provided on the surface of the base;
a heat pipe extending in a plane direction of the base portion, the heat pipe being provided in the internal space of the base portion;
and a sealing member that seals the internal space of the base portion, the sealing member being provided in the internal space of the base portion so as to face the longitudinal end portion of the heat pipe.
[2] The heat sink according to [1], wherein a resin material is further interposed between the longitudinal end of the heat pipe and the sealing member.
[3] The heat sink according to [1] or [2], wherein the internal space of the base portion is a hole extending in the plane direction of the base portion, and the heat pipe is inserted into the hole.
[4] The heat sink according to [2], wherein the space between the longitudinal end of the heat pipe and the sealing member is filled with the resin material.
[5] The heat sink according to [2] or [4], wherein the space between a part of the peripheral surface of the heat pipe and the inner surface of the internal space of the base portion is filled with the resin material.
[6] The heat sink according to any one of [1] to [5], wherein the base portion is plastically deformed and the heat pipe is fixed in the internal space of the base portion.
[7] The heat sink according to any one of [1] to [6], wherein the material of the base portion is different from the material of the container of the heat pipe.
[8] The heat sink according to any one of [1] to [7], wherein the sealing member is metal, and the material of the sealing member is the same as the material of the base portion.
[9] The heat sink according to any one of [1] to [8], wherein a convex portion is provided on the surface of the base portion.
[10] The heat sink according to any one of [1] to [9], wherein the heat pipe has a portion extending in the planar direction of the heat radiation fins.
[11] Any one of [1] to [10], wherein a plurality of the radiation fins are arranged in parallel on the surface of the base portion, and the heat pipe has a portion extending in the arrangement direction of the plurality of the radiation fins. The heatsink described in .
[12] The heat sink according to any one of [1] to [11], wherein the radiation fins are provided on one side of the base portion.
[13] The heat sink according to any one of [1] to [11], wherein the radiation fins are provided on both sides of the base portion.
[14] The heat sink according to any one of [1] to [13], wherein the ratio of the radial dimension of the heat pipe to the thickness of the base portion is 0.009 or more and 0.800 or less.
[15] The heat sink according to any one of [1] to [14], wherein the base portion has a thickness of 8.0 mm or more and 500 mm or less.
[16] The heat sink according to any one of [1] to [15], which has a region in which the plurality of radiation fins provided on the surface of the base portion have different fin pitches.
[17] The heat sink according to any one of [1] to [16], wherein a plurality of heat pipes are provided in the longitudinal direction of the heat pipes.

In the aspect [1] of the heat sink of the present invention, the inner space is formed in the base portion, and the heat pipe is provided in the inner space, so the outer peripheral surface of the heat pipe is not exposed from the surface of the base portion.

Further, in the aspect [6] of the heat sink of the present invention, the base portion is plastically deformed and the heat pipe is fixed in the internal space of the base portion, and the heat pipe must be fixed to the base portion by soldering. no. Therefore, it is not necessary to separately form a plated layer necessary for soldering on the outer surface of the container of the heat pipe.

According to the aspect of the heat sink of the present invention, the heat pipe extending in the planar direction of the base portion is provided in the inner space of the base portion, and the heat pipe extends in the inner space of the base portion in the longitudinal direction of the heat pipe. By providing a sealing member that seals the internal space of the base portion, the heat pipe provided in the internal space of the base portion is excellently sealed. Therefore, according to the aspect of the heat sink of the present invention, it is possible to prevent corrosion of the portion where the container and the base portion of the heat pipe are in contact with each other due to moisture such as rainwater and humidity. Further, according to the aspect of the heat sink of the present invention, since the heat pipe is provided in the inner space of the base portion, the thermal connectivity between the base portion and the heat pipe is excellent, and the heat pipe can be arranged freely. improves.

According to the aspect of the heat sink of the present invention, a resin material is further interposed between the longitudinal end of the heat pipe and the sealing member, so that the heat sink provided in the internal space of the base portion The sealability to the heat pipe is further improved, and corrosion of the portion where the container of the heat pipe and the base portion contact due to moisture such as rainwater and humidity can be prevented more reliably, and the inner space of the base portion The fixability of the heat pipe in is improved.

According to the aspect of the heat sink of the present invention, the space between the longitudinal end of the heat pipe and the sealing member is filled with the resin material, thereby sealing the heat pipe provided in the internal space of the base. The fixing property is further improved, and the fixing property of the heat pipe in the inner space of the base portion is further improved.

If a plated layer necessary for soldering to the base portion is formed on the outer surface of the heat pipe container, the corrosion resistance of the heat pipe container may deteriorate on the base portion side using, for example, aluminum. On the other hand, according to the aspect of the heat sink of the present invention, the base portion is plastically deformed so that the heat pipe is fixed in the internal space of the base portion, and the heat pipe need not be fixed to the base portion by soldering. Therefore, it is possible to more reliably prevent corrosion at the portion where the container and the base portion of the heat pipe are in contact with each other.

According to the aspect of the heat sink of the present invention, since the heat pipe provided in the inner space of the base portion is excellently sealed, even if the material of the base portion is different from the material of the container of the heat pipe, rainwater It is possible to prevent dissimilar metal contact corrosion due to moisture such as moisture.

According to the aspect of the heat sink of the present invention, the sealing member is made of metal, and the material of the sealing member is the same as the material of the base portion. It is possible to further prevent corrosion from occurring in the portion where the container and the base portion of the heat pipe are in contact. Further, a resin material is interposed between the longitudinal end of the heat pipe and the metal sealing member, so that the heat pipe provided in the internal space of the base can be sealed. Further, it is possible to more reliably prevent corrosion of the portion where the container of the heat pipe and the base portion come into contact with each other due to moisture such as rainwater and humidity.

According to the aspect of the heat sink of the present invention, since the heat pipe has a portion extending in the planar direction of the radiation fins, the heat from the heating element can be transported to the entire radiation fins, so that the fin efficiency of the radiation fins is improved. improves.

According to the aspect of the heat sink of the present invention, a plurality of radiating fins are arranged in parallel on the surface of the base portion, and the heat pipe has a portion extending in the arrangement direction of the plurality of radiating fins. Since it can be transported to the heat radiating fins, the fin efficiency of the plurality of heat radiating fins is improved.

According to the aspect of the heat sink of the present invention, since the ratio of the radial dimension of the heat pipe to the thickness of the base portion is 0.10 or more and 0.80 or less, the heat transport characteristics of the heat pipe and the heat dissipation of the base portion are improved. It is possible to improve the heat transfer characteristics with respect to the fins in a well-balanced manner.

1 is a perspective view illustrating a heat sink according to a first embodiment of the invention; FIG. FIG. 10 is a perspective view illustrating a heat sink according to a second embodiment of the invention; FIG. 11 is a perspective view illustrating a heat sink according to a third embodiment of the invention; FIG. 11 is a perspective view illustrating a heat sink according to a fourth embodiment of the invention; FIG. 11 is a plan view illustrating a heat sink according to a fifth embodiment of the invention; It is a front view explaining the heat sink concerning the 5th Embodiment of this invention. It is a bottom view explaining the heat sink concerning the 5th Embodiment of this invention. FIG. 11 is a perspective view illustrating a heat sink according to a fifth embodiment of the invention; FIG. 11 is a side cross-sectional view illustrating a heat sink according to a fifth embodiment of the present invention; FIG. 11 is a cross-sectional view illustrating a heat sink according to a sixth embodiment of the invention; FIG. 21 is a cross-sectional view illustrating a heat sink according to a seventh embodiment of the invention; FIG. 21 is a perspective view illustrating a heat sink according to an eighth embodiment of the invention; FIG. 20 is a perspective view from the rear for explaining a heat sink according to a ninth embodiment of the present invention; FIG. 21 is a front perspective view illustrating a heat sink according to a ninth embodiment of the present invention; FIG. 21 is a perspective view illustrating a heat sink according to a tenth embodiment of the present invention; FIG. 16(a) is an explanatory diagram of a base portion in an example of the method for manufacturing a heat sink of the present invention, and FIG. 16(b) is a cross-sectional view taken along line AA of FIG. 16(a). FIG. 4 is an explanatory diagram of a heat pipe inserting step in the example of the method for manufacturing the heat sink of the present invention; FIG. 4 is a partial enlarged view of a heat pipe inserting step in the example of the heat sink manufacturing method of the present invention. FIG. 4 is a partial enlarged view of a plastic deformation step in the example of the heat sink manufacturing method of the present invention; FIG. 4 is a partially enlarged view of a resin material charging step in the example of the method for manufacturing the heat sink of the present invention; FIG. 4 is a partial enlarged view of a sealing step in the example of the method for manufacturing the heat sink of the present invention; FIG. 4 is a partially enlarged view after the sealing step in the example of the method for manufacturing the heat sink of the present invention;

A heat sink according to a first embodiment of the present invention will be described below with reference to the drawings. In addition, FIG. 1 is a perspective view for explaining the heat sink according to the first embodiment of the present invention.

As shown in FIG. 1, the heat sink 1 according to the first embodiment includes a flat base portion 20, a plurality of heat radiation fins 10 provided on the surface of the base portion 20, and a base. and a heat pipe 30 extending in the planar direction of the base portion 20 and provided in the internal space 23 of the portion 20 . The heat pipe 30 is thermally connected to the base portion 20 by providing the heat pipe 30 in the internal space 23 of the base portion 20 . Moreover, since the heat radiation fins 10 are provided on the first surface 21 of the base portion 20 , the heat radiation fins 10 are thermally connected to the base portion 20 .

The base portion 20 is a plate-like portion having a first direction L1 and a second direction L2 orthogonal to the first direction L1. The shape of the base portion 20 is not particularly limited, but for convenience of explanation, the heat sink 1 has a quadrangular shape in a plan view (viewed from a position facing the heat radiation fins 10). The base portion 20 has a flat first surface 21 and a flat second surface 22 facing the first surface 21 . A plurality of radiating fins 10, 10, 10, . are thermally connected. The base portion 20 is thermally connected to the heat generating element 100 by bringing the heat generating element 100 into contact with the second surface 22 of the base portion 20 . Therefore, the second surface 22 of the base portion 20 functions as a heat receiving surface.

The base portion 20 is made of a heat-conducting member. Examples of heat-conducting members include metal members such as copper, copper alloys, aluminum, and aluminum alloys.

A plurality of plate-shaped heat dissipation fins 10, 10, 10, . . . The radiation fins 10 are erected on the first surface 21 of the base portion 20 at a predetermined angle with respect to the extending direction of the first surface 21 . In the heat sink 1 , the radiation fins 10 are erected substantially perpendicularly to the extending direction of the first surface 21 . Also, the radiation fins 10 extend from one end to the other end of the base portion 20 in the second direction L2. Moreover, the heat radiation fins 10 have substantially the same height from one end to the other end of the base portion 20 in the second direction L2.

A plurality of radiation fins 10 , 10 , 10 . . . are arranged in parallel on the first surface 21 of the base portion 20 to form a radiation fin group 11 . In the heat sink 1, a plurality of radiation fins 10, 10, 10, . . . The fin pitches of the plurality of radiation fins 10, 10, 10, ... are not particularly limited, and in the heat sink 1, the plurality of radiation fins 10, 10, 10, ... are arranged at approximately equal intervals over the entire radiation fin group 11. arranged in parallel.

The heat dissipation fins 10 are not provided on the second surface 22 of the base portion 20 . Therefore, the radiation fins 10 are provided on one side of the base portion 20 . The radiation fin 10 is thin and flat, and has a main surface 12 and side surfaces 13 . Main surface 12 of heat dissipation fin 10 mainly contributes to heat dissipation of heat dissipation fin 10 . The width of the side surface 13 constitutes the thickness of the heat radiating fin 10 .

The material of the radiation fins 10 is not particularly limited, and examples thereof include copper, copper alloys, aluminum, and aluminum alloys. As the material of the radiation fins 10, the same material as that of the base portion 20 can be used. Further, the radiation fins 10 may be formed integrally with the base portion 20, or may be a separate member from the base portion 20. It is preferable that the radiation fins 10 are formed integrally with the base portion 20 in terms of performance, reduction of manufacturing costs, and the like.

As shown in FIG. 1, an internal space 23 is formed in the base portion 20 . The internal space 23 of the base portion 20 is a hole extending in the planar direction of the base portion 20 and formed at a predetermined position on the side surface 27 forming the thickness direction of the base portion 20 . From the above, the interior space 23 of the base portion 20 is provided at a position separated from the first surface 21 and the second surface 22 by a predetermined distance. Therefore, the internal space 23 is built into the base portion 20 . In the heat sink 1 , an internal space 23 extends along the extending direction of the heat radiating fins 10 , that is, along the second direction L<b>2 of the base portion 20 . The internal space 23 is a through hole penetrating through the base portion 20 . The radial shape and size of the internal space 23 , which is the hole, correspond to the radial shape and size of the heat pipe 30 , and the heat pipe 30 is inserted into the internal space 23 . Since the heat pipe 30 is provided in the internal space 23 formed in the base portion 20 , the heat pipe 30 is built in the base portion 20 . Also, the outer peripheral surface of the heat pipe 30 is not exposed from the surfaces of the first surface 21 and the second surface 22 of the base portion 20 .

The heat pipe 30 includes a tubular container 33 in which the end surface of one end portion 31 and the end surface of the other end portion 32 are sealed, and a wick structure (not shown) having a capillary force housed in the container 33. ) and a working fluid (not shown) such as water sealed in the inner space of the container 33 . The container 33 is a tubular material with a sealed internal space. Further, the internal space of the container 33 is decompressed by degassing. In the heat sink 1, the longitudinal shape of the container 33 is substantially linear. Further, the shape of the container 33 in the direction perpendicular to the longitudinal direction (radial direction) is not particularly limited and may be circular, elliptical, flat, rectangular, or the like. ing. Corresponding to the longitudinal shape and the radial shape of the container 33, the longitudinal shape of the internal space 23 of the base portion 20 is substantially linear, and the direction perpendicular to the longitudinal direction of the internal space 23 (radial direction). ) is circular.

In heat sink 1 , heat pipe 30 extends in the plane direction of heat radiating fins 10 in correspondence with internal space 23 extending along the plane direction of main surfaces 12 of heat radiating fins 10 . That is, the longitudinal direction of the heat pipe 30 extends along the second direction L2 of the base portion 20 . Further, in the heat sink 1, a plurality of internal spaces 23, 23, 23, . are provided with heat pipes 30 respectively. Therefore, the plurality of heat pipes 30, 30, 30, .

The heat pipe 30 is fixed in the internal space 23 of the base portion 20 by plastically deforming the base portion 20 . From the above, the heat pipe 30 need not be fixed to the base portion 20 by soldering. Therefore, it is not necessary to separately form a plating layer necessary for soldering on the outer surface of the container 33 of the heat pipe 30 .

The base portion 20 is pressed in the direction of the heat pipe 30 by a pressing jig from the first surface 21 or the second surface 22 of the base portion 20 with respect to the heat pipe 30 inserted in the internal space 23 . , the base portion 20 is plastically deformed. Since the base portion 20 is plastically deformed as described above, the heat pipe 30 is pressed in the pressing direction (that is, the crimping direction), and is expanded in diameter in a direction perpendicular to the crimping direction. 30 is pressed against the internal space 23 , and the heat pipe 30 is caulked and fixed to the internal space 23 of the base portion 20 . The plastically deformed portion of the base portion 20 is preferably only the portion where the heat pipe 30 is in contact with the internal space 23 from the viewpoint of facilitating the insertion of the sealing member 40, which will be described later. That is, it is preferable that the one end 24 and the other end 25 of the internal space 23 into which the sealing member 40 is inserted are not plastically deformed.

When the base portion 20 is pressed from the surface of the base portion 20 , the convex portion 51 may be provided on the surface of the base portion 20 . When the base portion 20 is pressed from the first surface 21 of the base portion 20 , the convex portion 51 is provided between the heat dissipating fins 10 on the first surface 21 of the base portion 20 . may be When the base portion 20 is pressed from above the second surface 22 of the base portion 20 , the convex portion 51 may be provided on the second surface 22 . Since the convex portion 51 is provided on the surface of the base portion 20 , the plastic deformation of the base portion 20 can be facilitated by pressing the convex portion 51 with a pressing jig. Fixability to the portion 20 is improved. In addition, in the heat pipe 30 , a convex portion 51 is provided between the heat radiating fins 10 on the first surface 21 of the base portion 20 .

The material of the container 33 of the heat pipe 30 may be the same as or different from the material of the base portion 20 . Examples of materials for the container 33 of the heat pipe 30 include copper, copper alloys, aluminum, aluminum alloys, titanium, titanium alloys, and stainless steel.

As shown in FIG. 1, the length of the heat pipe 30 is shorter than the length of the internal space 23, the heat pipe 30 exists in the central portion 26 of the internal space 23, and one end 24 and the other end 25 of the internal space 23 are separated from each other. The heat pipe 30 is not extended up to. Therefore, the heat pipe 30 does not exist at the one end 24 and the other end 25 of the internal space 23 . A sealing member 40 is inserted into one end 24 and the other end 25 of the internal space 23 of the base portion 20 . That is, at one end 24 and the other end 25 of the internal space 23 of the base portion 20, the internal space of the base portion 20 is opposed to one end portion 31 and the other end portion 32 in the longitudinal direction of the heat pipe 30, respectively. A sealing member 40 for sealing 23 is provided.

The sealing member 40 is a lid that is inserted into one end 24 and the other end 25 of the internal space 23 . By fitting the sealing member 40 into the one end 24 of the internal space 23, the one end 24 of the internal space 23 is sealed, and by fitting the sealing member 40 into the other end 25 of the internal space 23, The other end 24 of the internal space 23 is sealed. One end 24 of the internal space 23 is sealed with the sealing member 40, and the other end 24 of the internal space 23 is sealed with the sealing member 40, whereby the internal space 23 becomes a closed sealed space.

The outer end surface of the sealing member 40 may be positioned on the same plane as the side surface 27 forming the thickness direction of the base portion 20 . For example, by cutting the end portion of the sealing member 40 protruding from the side surface 27 forming the thickness direction of the base portion 20, the outer end surface of the sealing member 40 and the side surface forming the thickness direction of the base portion 20 are cut. 27 can be coplanar.

The sealing member 40 is preferably a metal member. If the sealing member 40 is made of a material other than metal, such as resin, air bubbles may remain inside the sealing member 40 . Resin tends not to have sufficient sealing properties for the heat pipe 30 provided in the internal space 23 of the base portion 20 . Since the sealing member 40 is a metal member, the heat pipe 30 provided in the internal space 23 of the base portion 20 can be sealed better than when the sealing member 40 is made of a material other than metal such as resin. It tends to have stopping properties. Examples of materials for the sealing member 40 include copper, copper alloys, aluminum, aluminum alloys, titanium, titanium alloys, and stainless steel. The material of the sealing member 40 may be the same as or different from the material of the base portion 20 . In addition, in the heat sink 1 , the material of the sealing member 40 is the same as the material of the base portion 20 . Since the sealing member 40 is a metal member and the material of the sealing member 40 is the same as the material of the base portion 20, the same metal is used over the entire side surface of the base portion 20, so moisture such as rainwater and humidity is prevented. Galvanic corrosion due to dissimilar metals does not occur, and it is possible to further prevent corrosion from occurring at the portion where the container and the base of the heat pipe contact each other. Further, a resin material is interposed between the longitudinal end of the heat pipe and the metal sealing member, thereby sealing the heat pipe 30 provided in the internal space 23 of the base portion 20. The stopping property is further improved, and it is possible to more reliably prevent corrosion of the portion where the container of the heat pipe 30 and the base portion 20 are in contact with each other due to moisture such as rainwater and humidity.

In addition, as shown in FIG. 21, which will be described later, the end of the sealing member 40 on the side of the heat pipe 30 preferably has a barb portion. The sealing member 40 has a smaller diameter toward the end on the side of the heat pipe 30, but the end on the side of the heat pipe 30 has a barbed portion, so that the end on the side of the heat pipe 30 has a widened shape. It has become. Since the end portion of the sealing member 40 on the side of the heat pipe 30 has a barb, the resin material 50 (to be described later) extends over the portion of the barb to further improve sealing performance with respect to the heat pipe 30 .

As shown in FIG. 1 , a resin material 50 is further interposed between one end 31 of the heat pipe 30 in the longitudinal direction and the sealing member 40 . In the heat sink 1 , the resin material 50 is filled between one end 31 of the heat pipe 30 in the longitudinal direction and the sealing member 40 . The resin material 50 is also filled between the peripheral surface of the heat pipe 30 near one end 31 and the inner surface of the internal space 23 of the base portion 20 . From the above, the resin material 50 filling the space between the one end 31 and the sealing member 40 extends between the peripheral surface of the heat pipe 30 near the one end 31 and the inner surface of the internal space 23 . It is reaching Therefore, one longitudinal end 31 of the heat pipe 30 is sealed with the resin material 50 .

A resin material 50 is also interposed between the other end 32 of the heat pipe 30 in the longitudinal direction and the sealing member 40 . In the heat sink 1 , the space between the other end 32 of the heat pipe 30 in the longitudinal direction and the sealing member 40 is filled with the resin material 50 . The resin material 50 is also filled between the peripheral surface of the heat pipe 30 near the other end 32 and the inner surface of the internal space 23 of the base portion 20 . From the above, the resin material 50 filling the space between the other end 32 and the sealing member 40 extends between the peripheral surface of the heat pipe 30 near the other end 32 and the inner surface of the internal space 23 . It is reaching Therefore, the other longitudinal end 31 of the heat pipe 30 is sealed with the resin material 50 .

The resin type of the resin material 50 is not particularly limited, and examples thereof include moisture-curable resins, thermosetting resins, and thermoplastic resins. Moisture-curable resins include, for example, silicone resins. Thermosetting resins include, for example, phenol resins, melamine resins, epoxy resins, and urea resins. Examples of thermoplastic resins include polyethylene, polypropylene, polystyrene, vinyl chloride resins, fluororesins, and acrylic resins. Of these, moisture-curable resins such as silicone resins are preferable from the viewpoint of the weather resistance and corrosion resistance of the resin material 50 .

Although the ratio of the radial dimension of the heat pipe 30 to the thickness of the base portion 20 in which the internal space 23 is provided is not particularly limited, the lower limit thereof is the point of reliably improving the heat transport characteristics of the heat pipe 30. Therefore, 0.009 is preferred, 0.010 is more preferred, and 0.011 is particularly preferred. On the other hand, the upper limit of the ratio of the radial dimension of the heat pipe 30 to the thickness of the base portion 20 is preferably 0.800, and 0 .700 is more preferred, and 0.600 is particularly preferred. It should be noted that "the ratio of the radial dimension of the heat pipe to the thickness of the base portion" is the thickness of the base portion relative to the average thickness of the base portion at the portion where the heat pipe is fixed in the internal space of the base portion. means the ratio of the average radial dimension of the heat pipe in the direction parallel to the longitudinal direction.

The thickness of the base portion 20 is not particularly limited, and can be appropriately selected depending on the usage conditions of the heat sink. More specifically, the range is 200 mm or more and 400 mm or less. The "thickness of the base portion" means the average thickness of the base portion at the portion where the heat pipe is fixed to the internal space of the base portion.

In the heat sink 1, the heat pipe 30 extending in the direction of the first surface 21 and the second surface 22 of the base portion 20 is provided in the internal space 23 of the base portion 20, and the heat pipe 30 is provided in the internal space 23 of the base portion 20. and a sealing member 40 for sealing the internal space 23 of the base portion 20 provided opposite to one end portion 31 and the other end portion 32 of the base portion 20 in the longitudinal direction of the base portion 20. The heat pipe 30 is excellent in sealing performance. Therefore, the heat sink 1 is excellent in weather resistance because it can prevent corrosion in the contact portion between the container 33 of the heat pipe 30 and the base portion 20 due to moisture such as rainwater and humidity.

Further, since the heat pipe 30 is provided in the internal space 23 of the base portion 20 , the heat sink 1 can contact the inner peripheral surface of the internal space 23 of the base portion 20 over the entire outer peripheral surface of the heat pipe 30 . There is excellent thermal connectivity between the base portion 20 and the heat pipe 30 . Further, since the heat pipe 30 is provided in the internal space 23 of the base portion 20 of the heat sink 1, unevenness or the like is formed on the second surface 22 of the base portion 20 to which the heating element 100 is thermally connected. However, it is possible to obtain a degree of freedom in arranging the heat pipes 30 .

The heat sink 1 further has a resin material 50 interposed between one end 31 of the heat pipe 30 and the sealing member 40 , and between the other end 32 of the heat pipe 30 and the sealing member 40 . In addition, since the resin material 50 is interposed, the sealing performance with respect to the heat pipe 30 provided in the internal space 23 of the base portion 20 is further improved, and the heat pipe 30 is damaged by moisture such as rainwater and humidity. Corrosion at the contact portion between the container 33 and the base portion 20 can be more reliably prevented, and fixability of the heat pipe 30 in the internal space 23 of the base portion 20 is improved. In particular, in the heat sink 1 , the space between the one end 31 and the other end 32 of the heat pipe 30 and the sealing member 40 is filled with the resin material 50 , so that the heat pipe 30 provided in the internal space 23 Further, the sealing performance against the heat pipe 30 is further improved, and the fixing property of the heat pipe 30 in the internal space 23 is further improved.

When a plating layer necessary for soldering to the base portion is formed on the outer surface of the container of the heat pipe, the corrosion resistance of the container of the heat pipe may deteriorate. is fixed to the internal space 23 of the base portion 20, and the heat pipe 30 does not need to be fixed to the base portion 20 by soldering. Corrosion can be prevented more reliably, and the weather resistance is further improved.

As described above, the heat sink 1 has excellent sealing properties with respect to the heat pipe 30 provided in the base portion 20. Therefore, for example, the material of the base portion 20 is aluminum, and the material of the container 33 of the heat pipe 30 is copper. Moreover, even if the material of the base portion 20 and the material of the container 33 of the heat pipe 30 are different, it is possible to prevent galvanic corrosion due to moisture such as rainwater and humidity.

Further, in the heat sink 1, the heat pipe 30 extends in the direction of the main surface 12 of the radiation fins 10, so that the heat from the heating element 100 can be transported to the entire radiation fins 10. Improve efficiency.

Next, a heat sink according to a second embodiment of the invention will be described with reference to the drawings. Since the heat sink according to the second embodiment has the same main components as the heat sink according to the first embodiment, the same components as those of the heat sink according to the first embodiment will be described using the same reference numerals. do. In addition, FIG. 2 is a perspective view for explaining a heat sink according to the second embodiment of the present invention.

In the heat sink 1 according to the first embodiment, the internal space 23 of the base portion 20 extends along the extending direction of the radiation fins 10, and the heat pipes 30 extend toward the main surface 12 of the radiation fins 10. However, instead of this, as shown in FIG. 2, in the heat sink 2 according to the second embodiment, the base portion 20 extends along the direction in which the plurality of radiation fins 10, 10, 10 . , and a heat pipe 30 extends in the arrangement direction of the plurality of radiation fins 10, 10, 10, . . . . As described above, the heat pipes 30 extend substantially perpendicularly to the main surface 12 of the heat radiating fins 10 .

In the heat sink 2 as well, the heat pipe 30 extending in the direction of the first surface 21 and the second surface 22 of the base portion 20 provided in the internal space 23 of the base portion 20 and the internal space 23 of the base portion 20 are sealed. Since the sealing member 40 is provided, the heat pipe 30 built in the base portion 20 is excellently sealed. Also, in the heat sink 2 as well, since the heat pipe 30 is provided in the internal space 23 of the base portion 20, the entire outer peripheral surface of the heat pipe 30 can be in contact with the inner peripheral surface of the internal space 23 of the base portion 20. There is excellent thermal connectivity between the base portion 20 and the heat pipe 30 . Further, in the heat sink 2 as well, since the heat pipes 30 are provided in the internal space 23 of the base portion 20, the heat pipes 30 can be arranged freely even if the second surface 22 of the base portion 20 is uneven. degree can be obtained.

Further, in the heat sink 2, a plurality of heat radiation fins 10 are arranged in parallel on the first surface 21 of the base portion 20, and the heat pipe 30 has a portion extending in the arrangement direction of the plurality of heat radiation fins 10, 10, 10, . As a result, the heat from the heating element 100 can be transferred to the plurality of radiating fins 10, 10, 10 .

Next, a heat sink according to a third embodiment of the invention will be described with reference to the drawings. Since the heat sink according to the third embodiment has the main components in common with the heat sinks according to the first and second embodiments, the same components as the heat sinks according to the first and second embodiments are Description will be made using the same reference numerals. In addition, FIG. 3 is a perspective view for explaining a heat sink according to the third embodiment of the present invention.

In the heat sink 1 according to the first embodiment, the shape of the heat pipe 30 in the longitudinal direction is substantially linear, but instead of this, as shown in FIG. , the shape of the heat pipe 30 in the longitudinal direction is a shape having a curved portion, specifically an L shape. Therefore, in the heat sink 3, the heat pipe 30 has a portion 34 extending in the direction of the main surface 12 of the radiation fins 10 and a portion 35 extending in the arrangement direction of the plurality of radiation fins 10, 10, 10 . and have From the above, the internal space 23 of the base portion 20 is defined by the portion extending in the direction of the main surface 12 of the heat radiating fin 10 and the arrangement direction of the plurality of heat radiating fins 10, 10, 10 . . . and a portion that is distracted.

In the heat sink 3, a sealing member 40 is provided facing one end 31 of the heat pipe 30, and extends in the arrangement direction of the heat radiating fins 10, 10, 10, . A sealing member 40 is provided so as to face the portion 35 . A resin material 50 is filled between one end portion 31 of the heat pipe 30 and the sealing member 40, and extends in the arrangement direction of the heat radiating fins 10, 10, 10, . . . of the heat pipe 30. A resin material 50 is filled between the portion 35 and the sealing member 40 .

In the heat sink 3 as well, the heat pipe 30 extending in the direction of the first surface 21 and the second surface 22 of the base portion 20 provided in the internal space 23 of the base portion 20 and the internal space 23 of the base portion 20 are sealed. Since the sealing member 40 is provided, the heat pipe 30 built in the base portion 20 is excellently sealed. Also, since the heat pipe 30 is provided in the internal space 23 of the base portion 20 in the heat sink 3 as well, the entire outer peripheral surface of the heat pipe 30 can be in contact with the inner peripheral surface of the internal space 23 of the base portion 20 . There is excellent thermal connectivity between the base portion 20 and the heat pipe 30 . Further, in the heat sink 3 as well, since the heat pipes 30 are provided in the internal space 23 of the base portion 20, even if the second surface 22 of the base portion 20 is uneven, the heat pipes 30 can be arranged freely. degree can be obtained.

Next, a heat sink according to a fourth embodiment of the invention will be described with reference to the drawings. The heat sink according to the fourth embodiment has the main components in common with the heat sinks according to the first to third embodiments. Description will be made using the same reference numerals. In addition, FIG. 4 is a perspective view for explaining a heat sink according to the fourth embodiment of the present invention.

In the heat sink 1 according to the first embodiment, the shape of the heat pipe 30 in the longitudinal direction is substantially linear, but instead of this, as shown in FIG. , the shape of the heat pipe 30 in the longitudinal direction is a shape having a curved portion, specifically, a U shape. Therefore, in the heat sink 4, the heat pipe 30 has two parts 34 extending in the direction of the main surface 12 of the radiation fin 10 and extends in the arrangement direction of the plurality of radiation fins 10, 10, 10, . and one portion 35 . As described above, the internal space 23 of the base portion 20 includes two portions extending in the direction of the main surface 12 of the heat radiating fin 10, and a plurality of heat radiating fins 10, 10, 10, . . . and a portion extending in the direction of placement of the .

In the heat sink 4, a sealing member 40 is provided so as to face one end 31 and the other end 32 of the heat pipe 30, and the plurality of heat radiating fins 10, 10, 10 . A sealing member 40 is provided so as to face the portion 35 extending in the arrangement direction. A resin material 50 is filled between one end 31 of the heat pipe 30 and the sealing member 40 , and a resin material 50 is filled between the other end 32 of the heat pipe 30 and the sealing member 40 . is filled, and a resin material 50 is filled between the sealing member 40 and the portion 35 of the heat pipe 30 extending in the arrangement direction of the plurality of heat radiating fins 10, 10, 10 . there is

In the heat sink 4 as well, the heat pipe 30 extending in the direction of the first surface 21 and the second surface 22 of the base portion 20 provided in the internal space 23 of the base portion 20 and the internal space 23 of the base portion 20 are sealed. Since the sealing member 40 is provided, the heat pipe 30 built in the base portion 20 is excellently sealed. Moreover, since the heat pipe 30 is provided in the internal space 23 of the base portion 20 in the heat sink 4 as well, the entire outer peripheral surface of the heat pipe 30 can be in contact with the inner peripheral surface of the internal space 23 of the base portion 20 . There is excellent thermal connectivity between the base portion 20 and the heat pipe 30 . Also, in the heat sink 4 as well, since the heat pipes 30 are provided in the internal space 23 of the base portion 20, even if the second surface 22 of the base portion 20 is uneven, the heat pipes 30 can be arranged freely. degree can be obtained.

Next, a heat sink according to a fifth embodiment of the invention will be described with reference to the drawings. The heat sink according to the fifth embodiment has the same main components as the heat sinks according to the first to fourth embodiments. Description will be made using the same reference numerals. In addition, FIG. 5 is a plan view illustrating a heat sink according to the fifth embodiment of the present invention. FIG. 6 is a front view illustrating a heat sink according to the fifth embodiment of the invention. FIG. 7 is a bottom view illustrating a heat sink according to the fifth embodiment of the invention. FIG. 8 is a perspective view illustrating a heat sink according to a fifth embodiment of the invention. FIG. 9 is a side cross-sectional view illustrating a heat sink according to a fifth embodiment of the invention.

In the heat sink 1 according to the first embodiment, the fin pitches of the plurality of radiation fins 10, 10, 10 . 5 to 8, in the heat sink 5 according to the fifth embodiment, a plurality of radiation fins 10 provided on the first surface 21 of the base portion 20, 10, 10, . . . have regions with different fin pitches.

In the heat sink 5, the first surface 21 has a first region 21-1 and a second region 21-2 contiguous to the first region 21-1. A plurality of first heat radiation fins 10-1, 10-1, 10-1, . . . are arranged in parallel in the first region 21-1. The fin pitches of the plurality of first heat radiation fins 10-1, 10-1, 10-1 .・ are arranged in parallel at approximately equal intervals. A first heat pipe 30-1 extends in the plane direction of the first heat radiation fin 10-1 in the first region 21-1.

In the second region 21-2, a plurality of second heat radiation fins 10-2, 10-2, 10-2, . The fin pitches of the plurality of second heat radiation fins 10-2, 10-2, 10-2, .・ are arranged in parallel at approximately equal intervals. Further, the fin pitches of the plurality of second heat radiation fins 10-2, 10-2, 10-2, . . . It is larger than the fin pitch. That is, the distance between the plurality of first heat radiation fins 10-1, 10-1, 10-1, . The spacing between the fins of . . . is narrower.

A second heat pipe 30-2 different from the first heat pipe 30-1 extends in the second area 21-2 in the planar direction of the second heat radiating fin 10-2. Accordingly, a plurality of heat pipes 30, that is, a first heat pipe 30-1 and a second heat pipe 30-2 are provided along the longitudinal direction of the heat pipes 30. As shown in FIG.

In the heat sink 5, the cooling air is supplied from the second area 21-2 to the first area 21-1, so that the second heat radiation fin 10-2 having a large fin pitch is replaced by the first heat radiating fin 10-2 having a small fin pitch. Cooling air can be smoothly supplied to the heat radiation fins 10-1, and the heat radiation efficiency of the first heat radiation fins 10-1 is improved. Therefore, both the heat radiation fins 10 in the first region 21-1 and the second region 21-2 can exhibit excellent heat radiation efficiency.

As shown in FIG. 9, the heat sink 5 seals an internal space 23 formed in the first region 21-1 of the base portion 20 so as to face the longitudinal end of the first heat pipe 30-1. A sealing member 40 is provided, and a resin material 50 is further interposed between the sealing member 40 and the longitudinal end of the first heat pipe 30-1. In the heat sink 5, the sealing member 40 seals the internal space 23 formed in the second region 21-2 of the base portion 20 so as to face the longitudinal end of the second heat pipe 30-2. is provided, and a resin material 50 is further interposed between the longitudinal end of the second heat pipe 30-2 and the sealing member 40. As shown in FIG. In the heat sink 5, the heating element 100 is thermally connected to the second surface 22 corresponding to the first area 21-1 and the second surface 22 corresponding to the second area 21-2. ing.

The heat sink 5 also includes a heat pipe 30 extending in the direction of the first surface 21 of the base portion 20 provided in the internal space 23 of the base portion 20, and a sealing member 40 sealing the internal space 23 of the base portion 20. , the heat pipe 30 incorporated in the base portion 20 is excellently sealed. Moreover, since the heat pipe 30 is provided in the internal space 23 of the base portion 20 in the heat sink 5 as well, the entire outer peripheral surface of the heat pipe 30 can be in contact with the inner peripheral surface of the internal space 23 of the base portion 20 . There is excellent thermal connectivity between the base portion 20 and the heat pipe 30 . Further, in the heat sink 5 as well, since the heat pipes 30 are provided in the internal space 23 of the base portion 20, even if the base portion 20 is formed with unevenness or the like, the heat pipes 30 can be arranged with a degree of freedom. .

Next, a heat sink according to a sixth embodiment of the invention will be described with reference to the drawings. The heat sink according to the sixth embodiment has the same main components as the heat sinks according to the first to fifth embodiments. Description will be made using the same reference numerals. Note that FIG. 10 is a cross-sectional view illustrating a heat sink according to the sixth embodiment of the present invention.

In the heat sink 1 according to the first embodiment, the fin pitches of the plurality of radiation fins 10, 10, 10 . However, instead of this, in the heat sink 6 according to the sixth embodiment, as shown in FIG. 10 . . . have regions with different fin pitches.

In the heat sink 6, as a plurality of radiation fins, a plurality of first fin portions 14, 14, 14, . . . extending from the other end 62 in the second direction L2 to the central portion 63 of the second fin portion 15, 15, 15 . A plurality of first fin portions 14, 14, 14 . . . and a plurality of second fin portions 15, 15, 15 . Therefore, the fin pitch of the heat dissipating fins from the central portion 63 to the other end 62 of the base portion 20 is smaller than the fin pitch of the heat dissipating fins from the one end 61 to the central portion 63 of the base portion 20 .

In the heat sink 6, the fin pitches of the plurality of first fin portions 14, 14, 14... are substantially the same, and the fin pitches of the plurality of second fin portions 15, 15, 15... be. Also, the fin pitch of the first fin portion 14 may be the same as the fin pitch of the second fin portion 15 , or may be larger than the fin pitch of the second fin portion 15 . It may be smaller than the fin pitch. In the heat sink 6 , the fin pitch of the first fin portion 14 is substantially the same as the fin pitch of the second fin portion 15 .

The heat sink 6 also includes the heat pipe 30 extending in the planar direction of the base portion 20 and the sealing member 40 sealing the internal space 23 of the base portion 20. , the heat pipe 30 incorporated in the base portion 20 is excellently sealed. Also, in the heat sink 6, since the heat pipe 30 is provided in the internal space 23 of the base portion 20, the entire outer peripheral surface of the heat pipe 30 can be in contact with the inner peripheral surface of the internal space 23 of the base portion 20. There is excellent thermal connectivity between the base portion 20 and the heat pipe 30 . Further, in the heat sink 6 as well, since the heat pipes 30 are provided in the internal space 23 of the base portion 20, even if the base portion 20 is formed with unevenness or the like, the heat pipes 30 can be arranged with a degree of freedom. .

Next, a heat sink according to a seventh embodiment of the present invention will be described with reference to the drawings. The heat sink according to the seventh embodiment has the same main components as the heat sinks according to the first to sixth embodiments. Description will be made using the same reference numerals. Note that FIG. 11 is a cross-sectional view illustrating a heat sink according to the seventh embodiment of the present invention.

As shown in FIG. 11, in the heat sink 7 according to the seventh embodiment, a plurality of heat sinks are arranged in parallel along the planar direction of the radiation fins 10 and the longitudinal direction of the heat pipes 30 to form a heat sink composite. ing. In the heat sink 7, two heat sinks 1-1 and 1-2 having the same structure as the heat sink 1 according to the first embodiment are arranged in parallel.

The fin pitch of the heat radiating fins 10 of the heat sink 1-1 may be the same as or different from the fin pitch of the heat radiating fins 10 of the heat sink 1-2. Further, the number of heat radiation fins 10 installed on the heat sink 1-1 may be the same as or different from the number of heat radiation fins 10 installed on the heat sink 1-2. In the heat sink 7, the fin pitch of the heat radiating fins 10 of the heat sink 1-1 is larger than the fin pitch of the heat radiating fins 10 of the heat sink 1-2. The number of radiating fins 10 is less than that of the fins 10 installed. In the heat sink 7, by supplying the cooling air from the heat sink 1-1 to the heat sink 1-2, the heat radiation fins 10 of the heat sink 1-1 having a large fin pitch to the radiation fins 10 of the heat sink 1-2 having a small fin pitch. Cooling air can be supplied smoothly, and the heat dissipation efficiency of the heat dissipation fins 10 of the heat sink 1-2 is improved.

In the heat sink 7, which is a composite of a plurality of heat sinks, the heat pipe 30 extending in the plane direction of the base portion 20 provided in the internal space 23 of the base portion 20 and the sealing that seals the internal space 23 of the base portion 20 are provided. Since the stopper member 40 is provided, the heat pipe 30 incorporated in the base portion 20 is excellently sealed. Moreover, since the heat pipe 30 is provided in the internal space 23 of the base portion 20 in the heat sink 7 as well, the entire outer peripheral surface of the heat pipe 30 can be in contact with the inner peripheral surface of the internal space 23 of the base portion 20 . There is excellent thermal connectivity between the base portion 20 and the heat pipe 30 . Further, in the heat sink 7 as well, since the heat pipes 30 are provided in the internal space 23 of the base portion 20, even if the base portion 20 is formed with unevenness or the like, the heat pipes 30 can be arranged with a degree of freedom. .

Next, a heat sink according to an eighth embodiment of the present invention will be described with reference to the drawings. The heat sink according to the eighth embodiment shares major components with the heat sinks according to the first to seventh embodiments. Description will be made using the same reference numerals. Note that FIG. 12 is a perspective view illustrating a heat sink according to the eighth embodiment of the present invention.

In the heat sink 1 according to the first embodiment, the radiation fins 10 have substantially the same height regardless of their positions. 8, the heat radiating fins 10 have different heights at the position of one end 61 and the position of the other end 63 of the base portion 20 .

In the heat sink 8, the radiation fins 10 extend from one end 61 to the other end 62 of the base portion 20 in the second direction L2, and the height of the one end portion 16 located at the one end 61 of the base portion 20 is equal to or greater than that of the base portion 20. It is higher than the height of the other end 17 located at the other end 62 . Moreover, the radiation fins 10 are provided with a stepped portion 18 between the one end portion 16 and the other end portion 17 , and the heights of the radiation fins 10 are different across the stepped portion 18 . The radiation fin 10 has substantially the same height from the one end 16 to the stepped portion 18 located in the central portion 63 of the base portion 20, and has substantially the same height from the stepped portion 18 to the other end portion 17. As shown in FIG.

In the heat sink 8, by supplying the cooling air from the other end 17 to the one end 16 of the heat radiating fins 10, the cooling air can be smoothly supplied to the entire heat radiating fins 10, and the fin efficiency is improved.

Even with the heat sink 8 having the radiation fins 10 with different heights, it is possible to achieve the same effect as the heat sink 1 according to the first embodiment with the radiation fins 10 having substantially the same height.

Next, a heat sink according to a ninth embodiment of the present invention will be described with reference to the drawings. The heat sink according to the ninth embodiment has the same main components as the heat sinks according to the first to eighth embodiments. Description will be made using the same reference numerals. Note that FIG. 13 is a perspective view from the rear for explaining the heat sink according to the ninth embodiment of the present invention. FIG. 14 is a front perspective view illustrating a heat sink according to the ninth embodiment of the present invention.

In the heat sink 1 according to the first embodiment, the heat radiation fins 10 extend from one end to the other end of the base portion 20 in the second direction L2. Further, in the heat sink 9 according to the ninth embodiment of the present invention, the radiation fins 10 extend from the one end 61 to the central portion of the base portion 20 in the second direction L2 from the one end 61 to the other end 62 of the base portion 20. 63 , and the radiation fin 10 does not extend from the central portion 63 to the other end 62 .

Further, in the heat sink 1 according to the first embodiment, the heat pipe 30 extends from the vicinity of one end of the base portion 20 to the vicinity of the other end in the second direction L2. As shown in 14 , in the heat sink 9 , the heat pipe 30 extends from one end 61 to the center of the base portion 20 in the second direction L2 from one end 61 to the other end 62 of the base portion 20 in the same manner as the radiation fins 10 . The heat pipe 30 does not extend from the central portion 63 to the other end 62 . Therefore, the heat pipe 30 is built in from one end 61 to the central portion 63 of the base portion 20 from one end 61 to the other end 62 . In the heat sink 9, the heating element 100 is thermally connected to the region from the one end 61 to the central portion 63 of the base portion 20 where the heat radiating fins 10 and the heat pipes 30 are provided.

The heat sink 9 also includes the heat pipe 30 extending in the planar direction of the base portion 20 and provided in the internal space 23 of the base portion 20, and the sealing member 40 sealing the internal space 23 of the base portion 20. , the heat pipe 30 incorporated in the base portion 20 is excellently sealed. In the heat sink 9 as well, since the heat pipe 30 is provided in the internal space 23 of the base portion 20, the entire outer peripheral surface of the heat pipe 30 can be in contact with the inner peripheral surface of the internal space 23 of the base portion 20. There is excellent thermal connectivity between the base portion 20 and the heat pipe 30 . Further, in the heat sink 9 as well, since the heat pipes 30 are provided in the internal space 23 of the base portion 20, even if the base portion 20 is formed with unevenness or the like, the heat pipes 30 can be arranged with a degree of freedom. .

Next, a heat sink according to a tenth embodiment of the present invention will be described with reference to the drawings. The heat sink according to the tenth embodiment has the same main components as the heat sinks according to the first to ninth embodiments. Description will be made using the same reference numerals. Note that FIG. 15 is a perspective view illustrating a heat sink according to the tenth embodiment of the present invention.

In the heat sink 1 according to the first embodiment, a plurality of radiation fins 10, 10, 10, . 15, the heat sink 70 according to the tenth embodiment is provided with a plurality of heat radiation fins 10, 10, 10, . . . A plurality of radiating fins 10, 10, 10, . . . Therefore, in the heat sink 70 , the heat radiation fins 10 are provided on both sides of the base portion 20 . Note that there is a region on the second surface 22 where the heat radiating fins 10 are not provided, and the heating element 100 is thermally connected to the region on the second surface 22 where the heat radiating fins 10 are not provided. be. As described above, in the heat sink of the present invention, the radiation fins 10 can be provided on either one side or both sides of the base portion 20 depending on the conditions of use.

In the heat sink 70, since the heat radiation fins 10 are provided on both sides of the base portion 20, the heat radiation characteristics are further improved.

Next, an example of the method for manufacturing the heat sink of the present invention will be described with reference to the drawings. Here, an example of a heat sink manufacturing method will be described using the heat sink 1 according to the first embodiment. FIG. 16(a) is an explanatory view of the base portion in the example of the method for manufacturing the heat sink of the present invention, and FIG. 16(b) is a cross-sectional view taken along the line AA of FIG. 16(a). FIG. 17 is an explanatory view of the heat pipe inserting step in the example of the heat sink manufacturing method of the present invention. FIG. 18 is a partial enlarged view of a heat pipe inserting step in the example of the heat sink manufacturing method of the present invention. FIG. 19 is a partial enlarged view of the plastic deformation step in the example of the heat sink manufacturing method of the present invention. FIG. 20 is a partially enlarged view of a resin material charging step in the example of the heat sink manufacturing method of the present invention. FIG. 21 is a partial enlarged view of the sealing step in the example of the heat sink manufacturing method of the present invention. FIG. 22 is a partial enlarged view after the sealing step in the example of the heat sink manufacturing method of the present invention.

An example of a method for manufacturing a heat sink according to the present invention is a base portion 20 to which a heating element 100 is thermally connected, and a base portion 20 provided with an internal space 23 extending in the planar direction of the base portion 20; A heat sink portion preparation step of preparing a heat sink portion 1 ′ having heat radiating fins 10 provided on the surface of the base portion 20; a plastic deformation step of plastically deforming the surface of the base portion 20 to fix the heat pipe 30 inserted into the internal space 23 of the base portion 20; and a sealing step of providing a sealing member 40 for sealing the internal space 23 of the base portion 20 in the internal space 23 of the base portion 20 . In addition, after the plastic deformation process and before the sealing process, a resin material loading process is provided to load the resin material 50 into the ends 31 and 32 of the heat pipe 30 in the longitudinal direction.

<Process for preparing heat sink>
As shown in FIGS. 16(a) and 16(b), in the heat sink portion preparation step, the base portion 20 provided with the internal space 23 extending in the plane direction of the base portion 20; A heat sink part 1' provided with a plurality of radiating fins 10, 10, 10, . . . In the heat sink part 1', the heat radiation fins 10 may be formed integrally with the base part 20, or may be a separate member from the base part 20. The heat sink part 1' in which the heat radiation fins 10 are integrally formed with the base part 20 is preferable from the viewpoints of easiness of quality control, reduction of manufacturing cost, and the like. An internal space 23 of the heat sink portion 1 ′ is built in the base portion 20 . A convex portion 51 is provided on the first surface 21 of the base portion 20 . The heat sink portion 1' can be obtained, for example, by extrusion molding a metal material.

<Heat pipe insertion process>
As shown in FIGS. 17 and 18 , in the heat pipe inserting step, the heat pipe 30 is inserted into the internal space 23 of the base portion 20 from the one end 24 side or the other end 25 side of the internal space 23 . The length of the heat pipe 30 is shorter than the length of the internal space 23, the heat pipe 30 is present in the central portion 26 of the internal space 23, and the heat pipes 30 are present at one end 24 and the other end 25 of the internal space 23. Position the heat pipe 30 so that it does not. As shown in FIG. 18, before the plastic deformation process, the thickness of the base portion 20 in the portion of the internal space 23 is T1′, and the thickness of the heat pipe in the direction parallel to the thickness direction of the base portion 20 in the portion of the internal space 23 is T1′. The dimension of 30 (radial dimension) is D1'.

<Plastic deformation process>
As shown in FIG. 19, in the plastic deformation step, a pressing jig (not shown) presses the convex portion 51 provided on the first surface 21 of the base portion 20 against the heat pipe 30 inserted in the internal space 23 . ) is pressed in the direction of the heat pipe 30 to plastically deform the base portion 20 . By plastically deforming the base portion 20 as described above, the heat pipe 30 is crimped to the internal space 23 and fixed to the internal space 23 of the base portion 20 . The heat pipe 30 is thermally connected to the base portion 20 by fixing the heat pipe 30 to the internal space 23 of the base portion 20 . As shown in FIG. 19, by plastically deforming the base portion 20 in the plastic deformation process, the thickness of the base portion 20 at the portion where the heat pipe 30 is fixed to the internal space 23 changes from T1' to T1. The dimension of the heat pipe in the direction parallel to the thickness direction of the portion 20 (radial dimension) is reduced from D1' to D1. Therefore, in the heat sink 1, the thickness of the base portion 20 is T1, and the ratio of the radial dimension of the heat pipe 30 to the thickness of the base portion 20 is D1/T1. It should be noted that the convex portion 51 pressed toward the heat pipe 30 by the pressing jig may remain on the first surface 21 even after the pressing.

<Resin material charging process>
As shown in FIG. 20, in the resin material charging step, the resin material 50 is charged into the longitudinal ends 31 and 32 of the heat pipe 30 from one end 24 and the other end 25 of the internal space 23 . The resin material 50 contacts the longitudinal ends 31 and 32 of the heat pipe 30 and is inserted so as to fill the internal space 23 at the longitudinal ends 31 and 32 of the heat pipe 30 .

<Sealing process>
As shown in FIG. 21 , in the sealing step, the heat pipe 30 fixed in the internal space 23 is separated from one end 24 and the other end 25 of the heat pipe 30 in the longitudinal direction so as to face the longitudinal ends 31 and 32 of the base. A sealing member 40 is press-fitted into the internal space 23 of the base portion 20 to seal the internal space 23 of the base portion 20 . As shown in FIG. 22 , the sealing member 40 is inserted into the internal space 23 until it comes into contact with the resin material 50 , and the resin material 50 filling the internal space 23 is barbed from the end of the sealing member 40 on the side of the heat pipe 30 . By curing the resin material 50 after crossing over the portion , the resin material 50 and the sealing member 40 seal the internal space 23, and the heat sink 1 can be manufactured. If the sealing member 40 is made of metal and the material of the base portion 20 is also made of metal, the entire side surface of the base portion 20 is made of metal. When performing, selection of methods such as cleaning and painting can be facilitated.

Next, another embodiment of the heat sink of the present invention will be described. In the heat sinks of the above embodiments, the resin material was interposed between the longitudinal end of the heat pipe and the sealing member. may be sealed.

In the heat sinks of the above-described embodiments, the shape of the base portion was rectangular in plan view (viewed from a position facing the heat radiation fins). , can be appropriately selected, and may be a shape having a curved portion, a shape having a notch portion, or the like in plan view.

The heat sink of the present invention can prevent corrosion of the portion where the container and the base portion of the heat pipe are in contact with each other due to moisture such as rainwater and humidity, and has excellent weather resistance. It has high utility value in the field of cooling the heating element mounted on installed equipment.

1 heat sink 10 radiation fin 20 base portion 23 internal space 30 heat pipe 31 end portion 32 end portion 40 sealing member 50 resin material

Claims (16)

a base portion to which the heating element is thermally connected;
heat radiation fins provided on the surface of the base;
a heat pipe extending in a plane direction of the base portion, the heat pipe being provided in the internal space of the base portion;
a sealing member that seals the internal space of the base portion and is provided in the internal space of the base portion so as to face the longitudinal end of the heat pipe ;
A heat sink in which a resin material is further interposed between a longitudinal end of the heat pipe and the sealing member . 2. The heat sink according to claim 1 , wherein the internal space of said base portion is a hole portion extending in a plane direction of said base portion, and said heat pipe is inserted into said hole portion. 2. The heat sink according to claim 1 , wherein a space between the longitudinal end of the heat pipe and the sealing member is filled with the resin material. 4. The heat sink according to claim 1 , wherein a space between a part of the peripheral surface of the heat pipe and the inner surface of the internal space of the base portion is filled with the resin material. a base portion to which the heating element is thermally connected;
heat radiation fins provided on the surface of the base;
a heat pipe extending in a plane direction of the base portion, the heat pipe being provided in the internal space of the base portion;
a sealing member that seals the internal space of the base portion and is provided in the internal space of the base portion so as to face the longitudinal end of the heat pipe;
A heat sink in which the base portion is plastically deformed and the heat pipe is fixed in an internal space of the base portion. a base portion to which the heating element is thermally connected;
heat radiation fins provided on the surface of the base;
a heat pipe extending in a plane direction of the base portion, the heat pipe being provided in the internal space of the base portion;
a sealing member that seals the internal space of the base portion and is provided in the internal space of the base portion so as to face the longitudinal end of the heat pipe;
A heat sink wherein the material of the base portion is different than the material of the heat pipe container. The heat sink according to claim 1 , wherein the sealing member is metal, and the material of the sealing member is common to the material of the base portion. a base portion to which the heating element is thermally connected;
heat radiation fins provided on the surface of the base;
a heat pipe extending in a plane direction of the base portion, the heat pipe being provided in the internal space of the base portion;
a sealing member that seals the internal space of the base portion and is provided in the internal space of the base portion so as to face the longitudinal end of the heat pipe;
A heat sink , wherein a convex portion is provided on the surface of the base portion. a base portion to which the heating element is thermally connected;
heat radiation fins provided on the surface of the base;
a heat pipe extending in a plane direction of the base portion, the heat pipe being provided in the internal space of the base portion;
a sealing member that seals the internal space of the base portion and is provided in the internal space of the base portion so as to face the longitudinal end of the heat pipe;
A heat sink in which the heat pipe has a portion extending in a planar direction of the heat radiation fins. a base portion to which the heating element is thermally connected;
heat radiation fins provided on the surface of the base;
a heat pipe extending in a plane direction of the base portion, the heat pipe being provided in the internal space of the base portion;
a sealing member that seals the internal space of the base portion and is provided in the internal space of the base portion so as to face the longitudinal end of the heat pipe;
A heat sink, wherein a plurality of said radiating fins are arranged in parallel on the surface of said base portion, and said heat pipe has a portion extending in an arrangement direction of said plurality of said radiating fins. 2. The heat sink according to claim 1 , wherein said heat radiating fins are provided on one side of said base portion. 2. The heat sink according to claim 1 , wherein said heat radiating fins are provided on both sides of said base portion. The heat sink according to claim 1 , wherein the ratio of the radial dimension of the heat pipe to the thickness of the base portion is 0.009 or more and 0.800 or less. 2. The heat sink according to claim 1 , wherein the base portion has a thickness of 8.0 mm or more and 500 mm or less. 2. The heat sink according to claim 1 , wherein the plurality of radiating fins provided on the surface of the base portion have regions with different fin pitches. 2. The heat sink according to claim 1 , wherein a plurality of said heat pipes are provided in the longitudinal direction of said heat pipes.

Images