JP2014036050A - Heat radiator and heat radiation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiator capable of improving heat radiation efficiency while realizing simplification and miniaturization of a constitution.SOLUTION: A heat radiator 1 is formed of a heat radiation material having heat dissipation, and comprises plural fins 1a for heat radiation, and base parts 1b connected to bottoms of the plural fins 1a. The plural fins 1a are formed to stand from the base parts 1b, and plural through holes 1d penetrating through the base parts 1b in a direction almost orthogonal in a direction in which the fins 1a stand are formed on the base parts 1b.

Description

  The present invention relates to a radiator for dissipating heat from a heat generating component and the like, and a heat dissipation system including the radiator.

  2. Description of the Related Art Conventionally, an electronic component cooling device for cooling a semiconductor chip is known (see, for example, Patent Document 1). The cooling device described in Patent Document 1 includes a heat radiating member fixed to a semiconductor chip. The heat dissipating member has a plurality of fin walls, and a gas flow path is formed by the plurality of fin walls. In addition, a motor (fan motor) equipped with a fan is disposed in the flow path. In this cooling device, when the fan motor rotates, an air flow is generated in the flow path, and the semiconductor chip to which the heat dissipation member is fixed is cooled.

JP-A-7-235623

  In the cooling device described in Patent Document 1, since the air flow is forcibly generated in the flow path by the fan motor, the heat dissipation efficiency of the heat dissipation member can be increased. However, in this cooling device, the heat dissipation efficiency of the heat dissipation member is increased by generating an air flow in the flow path by the fan motor. Therefore, when the fan motor is stopped, the heat dissipation efficiency of the heat dissipation member is greatly reduced. That is, in this cooling device, in order to increase the heat dissipation efficiency of the heat dissipation member, a detection mechanism for detecting that the fan motor is not stopped is required, and as a result, the configuration of the device becomes complicated. Further, in this cooling device, since the fan motor must be disposed in the flow path, the heat dissipation member may be increased in size.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a radiator that can increase the heat dissipation efficiency while simplifying the configuration and reducing the size. Moreover, the subject of this invention is providing the thermal radiation system provided with this heat radiator.

  In order to solve the above problems, a radiator of the present invention is formed of a heat-dissipating material having heat dissipation, and includes a plurality of heat-dissipating fins and a base portion to which the bases of the plurality of fins are connected. The fin is formed so as to rise from the base, and a plurality of through holes are formed in the base so as to penetrate the base in a direction substantially perpendicular to the direction in which the fin rises.

  In the radiator of the present invention, a plurality of through holes are formed in the base so as to penetrate the base. Therefore, in this invention, it becomes possible to increase the thermal radiation area of a radiator by the part by which the through-hole was formed. In the present invention, for example, if compressed air is supplied to the through hole, the radiator can be cooled from the inside of the radiator by the compressed air passing through the through hole. Therefore, in this invention, it becomes possible to improve the thermal radiation efficiency of a heat radiator. Further, in the present invention, since a plurality of through holes are formed in the base, it is possible to improve the heat dissipation efficiency of the heatsink, so that the heatsink of the heatsink is simplified while simplifying and downsizing the structure of the heatsink. Efficiency can be increased.

  In the present invention, the through hole penetrates the base in a direction orthogonal to the direction in which the fin rises and the thickness direction of the fin, for example. In this case, it is preferable that the base portion is configured by a first base portion where the roots of the plurality of fins are connected and a second base portion that can be divided from the first base portion with a dividing surface passing through the plurality of through holes as a boundary. . With this configuration, for example, when the plurality of fins and the first base are integrally formed by extrusion and / or when the second base is formed by extrusion, the through holes are relatively easily and together. Can be formed. Therefore, it is possible to easily manufacture the radiator and reduce the manufacturing cost of the radiator.

  In the present invention, it is preferable that the base is formed with a plurality of second through holes penetrating from the fin forming surface of the base where the plurality of fins are formed to the through holes. If comprised in this way, it will become possible to increase the thermal radiation area of a radiator by the part in which the 2nd through-hole was formed. Moreover, if comprised in this way, if compressed air is supplied to a through-hole, it will become possible to apply the compressed air which passes a 2nd through-hole to a fin. Therefore, it is possible to efficiently cool the fins by blowing away the air layer with heat accumulated on the surface of the fins by the compressed air blown out from the second through holes to the tip side of the fins. As a result, it is possible to effectively increase the heat dissipation efficiency of the radiator.

  The radiator of the present invention can be used in a heat dissipation system including a compressed air supply source and a piping member for supplying compressed air from the supply source to the through hole. In this heat dissipation system, the radiator can be cooled from the inside of the radiator by the compressed air supplied from the supply source to the through hole via the piping member. Therefore, it is possible to increase the heat dissipation efficiency of the radiator.

  In the present invention, for example, the piping member is connected in series to the plurality of through holes so that the compressed air from the supply source sequentially passes through the plurality of through holes. In the present invention, the piping member may be connected in parallel to the plurality of through holes so that the compressed air from the supply source passes through the plurality of through holes together. In this case, compared with the case where the piping member is connected in series to the plurality of through holes, it is possible to shorten the passage path of the compressed air from the supply source to the through hole, so that the temperature can be further increased. Low compressed air can be supplied to the through hole. Therefore, the radiator can be effectively cooled, and as a result, the heat radiation efficiency of the radiator can be effectively increased.

  In the present invention, the base is formed with a plurality of second through holes penetrating from the fin forming surface of the base where the plurality of fins are formed to the through holes, and the plurality of second through holes are defined as the second through holes. It is preferable that the compressed air passing therethrough is formed so as to hit the side surface of the fin. With this configuration, the compressed air passing through the second through-hole supplied to the through-hole can be applied to the side surface of the fin, and the heated air layer staying on the surface of the fin can be blown off to the tip side of the fin. become. Therefore, it is possible to efficiently cool the fins, and as a result, it is possible to effectively increase the heat dissipation efficiency of the radiator.

  In the present invention, the plurality of second through holes are formed between the plurality of fins, and the compressed air passing through the second through holes is disposed on both sides of the plurality of second through holes. It is preferable that it is formed so as to hit each of the side surfaces. If comprised in this way, it will become possible to apply the compressed air which blows off from a 2nd through-hole to the both sides | surfaces of a fin, and to cool a fin more efficiently.

  In this invention, it is preferable that a thermal radiation system is provided with the pressure regulation valve arrange | positioned between a supply source and a through-hole. If comprised in this way, it will become possible to adjust the pressure of the compressed air which blows off from a 2nd through-hole, and to reduce the noise which generate | occur | produces when compressed air blows off from a 2nd through-hole.

  As described above, according to the present invention, it is possible to improve the heat dissipation efficiency of the heatsink while simplifying and downsizing the configuration of the heatsink.

It is a perspective view of a heat radiator concerning an embodiment of the invention. (A) is a figure for demonstrating an example of the thermal radiation system using the radiator shown in FIG. 1, (B) demonstrates the other example of the thermal radiation system using the radiator shown in FIG. FIG. It is a disassembled perspective view of the heat radiator concerning other embodiment of this invention. It is a top view of the heat radiator shown in FIG. It is a top view of the heat radiator concerning other embodiments of the present invention. It is a perspective view of the fin concerning the other embodiment of the present invention, and the 1st base. It is a rear view which shows the 1st base shown in FIG. 6 from the groove part side. It is a figure for demonstrating the heat radiator concerning other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Configuration of radiator)
FIG. 1 is a perspective view of a radiator 1 according to an embodiment of the present invention. In the following description, as shown in FIG. 1 and the like, the three directions orthogonal to each other are defined as an X direction, a Y direction, and a Z direction. The X direction is the left-right direction, the Y direction is the front-rear direction, and the Z direction is the up-down direction. Further, a plane composed of the Y direction and the Z direction is defined as a YZ plane, and a plane composed of the Z direction and the X direction is defined as a ZX plane.

  The radiator 1 of the present embodiment is an instrument (heat sink) for dissipating heat such as a heat generating part of an industrial servo motor (not shown) and a circuit board (not shown) of the servo motor. The heat radiator 1 is formed of a heat radiating material having heat radiating properties. Specifically, the radiator 1 is formed of a metal material such as aluminum. The radiator 1 includes a plurality of heat radiation fins 1a and a base portion 1b to which the bases of the plurality of heat radiation fins 1a are connected. The radiator 1 of this embodiment includes eight fins 1a. The base 1b is formed in a substantially rectangular flat plate shape, and the eight fins 1a are formed integrally with the base 1b. In the following description, it is assumed that the base 1b formed in a substantially rectangular flat plate shape is disposed substantially parallel to the ZX plane.

  The fin 1a is formed in a substantially rectangular thin flat plate shape. The thickness of the fin 1a is gradually reduced from the base toward the tip. The fin 1a is formed so as to rise from one surface 1c of the base 1b to one side in the front-rear direction, and is disposed substantially parallel to the YZ plane. That is, the left-right direction is the thickness direction of the fin 1a. Further, the eight fins 1a are arranged at substantially equal intervals in the left-right direction.

  A plurality of through holes 1d penetrating the base 1b in the vertical direction are formed in the base 1b. The through hole 1d is formed, for example, in a round hole shape having a circular shape when viewed from the vertical direction. In this embodiment, four through holes 1d are formed in the base 1b. The four through holes 1d are formed at substantially equal intervals in the left-right direction. Female screws (not shown) for fixing a piping member 4 to be described later are formed on both upper and lower ends of the inner peripheral surface of the through hole 1d. In addition, one surface 1c of the base 1b of the present embodiment is a fin forming surface on which a plurality of fins 1a are formed. Hereinafter, one surface 1c is referred to as “fin forming surface 1c”.

  When the radiator 1 is used, the radiator 1 is attached to a heat generating part of a servo motor or a circuit board. Specifically, the back surface of the base portion 1b opposite to the fin forming surface 1c is attached to a heat generating portion of a servo motor, a circuit board, or the like via an insulating sheet or the like.

(Configuration of heat dissipation system)
2A is a diagram for explaining an example of a heat dissipation system 2 using the radiator 1 shown in FIG. 1, and FIG. 2B is a heat dissipation system using the radiator 1 shown in FIG. It is a figure for demonstrating the other example of 2. FIG.

  As described above, the radiator 1 is an instrument for dissipating heat such as a heat generating portion of a servo motor or a circuit board. The heat radiator 1 constitutes a part of a heat radiation system 2 installed in a factory where a servo motor is used, for example. In addition to the radiator 1, the heat dissipation system 2 includes a compressed air supply source 3 such as a compressor, and a piping member 4 for supplying compressed air from the supply source 3 to the through hole 1 d of the radiator 1. . As the supply source 3, a compressor or the like originally installed in a factory where the servo motor is used is used. For example, compressed air having a temperature of about room temperature of the factory is supplied from the supply source 3. The

  For example, as shown in FIG. 2A, the piping member 4 is arranged in parallel with the four through holes 1d so that the compressed air from the supply source 3 passes through the four through holes 1d together (simultaneously). Connected with. That is, the supply piping member 4 is connected to one end of each of the four through holes 1d, and the discharge piping member 4 is connected to each of the other ends of the four through holes 1d. The piping member 4 is composed of a metal joint fixed to the through hole 1d and a rubber or resin tube connected to the joint. The outer peripheral surface of the joint has an inner portion of the through hole 1d. A male screw (not shown) that engages with a female screw formed on the peripheral surface is formed.

  2B, the piping member 4 may be connected in series to the four through holes 1d so that the compressed air from the supply source 3 sequentially passes through the four through holes 1d. good. Specifically, the piping member 4 is configured so that the compressed air sequentially passes through the four through holes 1d from the through hole 1d arranged at one end in the left-right direction toward the through hole 1d arranged at the other end in the left-right direction. May be connected. That is, the supply piping member 4 is connected to one end of the through-hole 1d arranged at one end in the left-right direction, and the discharge piping member 4 is connected to one end of the through-hole 1d arranged at the other end in the left-right direction. In addition, the end portions of the through holes 1 d adjacent in the left-right direction may be connected by the piping member 4.

(Main effects of this form)
As described above, in this embodiment, the base 1b of the cooler 1 is formed with a plurality of through holes 1d penetrating the base 1b in the vertical direction. Therefore, in this embodiment, it is possible to increase the heat radiation area of the radiator 1 by the amount that the through hole 1d is formed. Further, in this embodiment, since the compressed air from the supply source 3 is supplied to the through hole 1d through the piping member 4, the radiator 1 is cooled from the inside of the base 1b by the compressed air passing through the through hole 1d. can do. Therefore, in this embodiment, the heat dissipation efficiency of the radiator 1 can be increased. Further, in this embodiment, by forming a plurality of through holes 1d in the base 1b, it becomes possible to increase the heat dissipation efficiency of the radiator 1, so that the configuration of the radiator 1 is simplified and miniaturized, The heat dissipation efficiency of the radiator 1 can be increased.

  In this embodiment, the piping member 4 is connected in parallel to the four through holes 1d so that the compressed air from the supply source 3 passes through the four through holes 1d together. Therefore, compared with the case where the piping members 4 are connected in series to the four through holes 1d so that the compressed air from the supply source 3 sequentially passes through the four through holes 1d, in this embodiment, the supply source It is possible to shorten the passage of compressed air from 3 to the through hole 1d. Therefore, in this embodiment, compressed air having a lower temperature can be supplied to the through-hole 1d, and the radiator 1 can be effectively cooled. As a result, in this embodiment, the heat dissipation efficiency of the radiator 1 can be effectively increased.

(Modification 1 of radiator)
FIG. 3 is an exploded perspective view of a radiator 1 according to another embodiment of the present invention. FIG. 4 is a plan view of the radiator 1 shown in FIG. FIG. 5 is a plan view of a radiator 1 according to another embodiment of the present invention.

  With the form mentioned above, the base 1b of the heat radiator 1 is integrally formed. In addition, for example, as shown in FIG. 3, the base 1b includes a first base 1e to which the bases of the eight fins 1a are connected, and a second base 1f that can be divided from the first base 1e in the front-rear direction. May be. In this case, the eight fins 1a and the first base 1e are integrally formed. As shown in FIG. 4, the second base 1f can be divided from the first base 1e with a dividing plane P passing through the four through holes 1d as a boundary.

  The dividing plane P is a plane parallel to the ZX plane. In the example shown in FIGS. 3 and 4, the dividing surface P is a plane that passes through the centers of the four through holes 1 d when viewed from above and below, and the groove 1 g formed in the first base 1 e. And the through-hole 1d is comprised by the groove part 1h formed in the 2nd base 1f. The first base 1e and the second base 1f are integrated by screws or the like not shown. Further, in order to reduce the thermal resistance between the first base 1e and the second base 1f, a thermal conductive grease having excellent thermal conductivity is applied between the first base 1e and the second base 1f. Yes.

  In this way, when the first base 1e and the second base 1f can be divided with the dividing plane P passing through the four through holes 1d as a boundary, for example, the eight fins 1a and the first base 1e can be integrally formed by extrusion, and the groove 1g can be formed relatively easily and together when the eight fins 1a and the first base 1e are extruded. In addition, the second base portion 1f can be formed by extrusion molding, and the groove portion 1h can be formed relatively easily and together when the second base portion 1f is extruded. Therefore, in this case, the radiator 1 can be easily manufactured, and the manufacturing cost of the radiator 1 can be reduced.

  As shown in FIG. 5, the dividing plane P may be a plane that passes through one end in the front-rear direction of the four through holes 1 d when viewed from the up-down direction. In this case, as shown in FIG. 5A, the groove portion is not formed in the second base portion 1f, but the U-shaped groove portion 1j formed in the first base portion 1e and the plane portion of the second base portion 1f. The through-hole 1d may be configured, and as shown in FIG. 5B, a groove portion 1k and a first base portion formed in the second base portion 1f without forming a groove portion in the first base portion 1e. Through-hole 1d may be comprised by the plane part of 1e. Even in these cases, similarly to the example shown in FIGS. 3 and 4, the radiator 1 can be easily manufactured, and the manufacturing cost of the radiator 1 can be reduced.

(Modification 2 of radiator)
FIG. 6 is a perspective view of the fin 1a and the first base 1e according to another embodiment of the present invention. FIG. 7 is a rear view showing the first base 1e shown in FIG. 6 from the groove 1j side.

  When the first base portion 1e and the second base portion 1f can be divided with the dividing surface P as a boundary, even if a plurality of second through holes 1r penetrating from the fin forming surface 1c to the through hole 1d are formed. good. For example, in the example shown in FIG. 5A, a plurality of second through holes 1r penetrating from the fin forming surface 1c to the wall surface of the groove 1j may be formed as shown in FIGS. In this case, the plurality of second through holes 1r are formed at substantially constant intervals in the vertical direction. In this case, the plurality of second through holes 1r are preferably formed so that the compressed air blown out from the second through holes 1r hits the side surfaces of the fins 1a.

  In this case, the heat radiation area of the radiator 1 can be increased by the amount of the second through hole 1r formed. In this case, the compressed air supplied to the through hole 1d and passed through the second through hole 1r can be applied to the fin 1a. Therefore, it is possible to efficiently cool the fin 1a by blowing off the air layer with heat accumulated on the surface of the fin 1a by the compressed air blown from the second through hole 1r to the tip side of the fin 1a. As a result, the heat dissipation efficiency of the radiator 1 can be effectively increased.

  In this case, a pressure regulating valve (not shown) is disposed between the supply source 3 and the through hole 1d, and noise generated when compressed air blows out from the second through hole 1r is reduced. It is preferable to adjust the pressure of the compressed air blown from the second through hole 1r. In the example shown in FIGS. 3 and 4 described above, a plurality of second through holes penetrating from the fin forming surface 1c to the groove 1g may be formed. Further, as shown in FIG. 1, when the base portion 1b is integrally formed, a plurality of second through holes 1r penetrating from the fin forming surface 1c to the through hole 1d may be formed.

(Variation 3 of radiator)
FIG. 8 is a view for explaining a radiator 1 according to another embodiment of the present invention.

  In the above-described embodiment, when viewed from the front-rear direction, some of the through holes 1d and the fins 1a overlap (specifically, as shown in FIG. 1, they are arranged at both ends in the left-right direction). The four through holes 1d are formed in the base 1b so that a part of the two through holes 1d and the fin 1a overlap each other. In addition, for example, as shown in FIG. 8A, when viewed from the front-rear direction, the through-hole 1d and the fin 1a do not overlap between the fins 1a adjacent in the left-right direction. All the through holes 1d may be formed in the base 1b. For example, a total of seven through holes 1d arranged one by one between the adjacent fins 1a in the left-right direction when viewed from the front-rear direction may be formed in the base 1b.

  In this case, as shown in FIG. 8A, the first base 1e and the second base 1f may be separable with the dividing plane P as a boundary. In this case, as shown in FIG. 8B, a plurality of second through holes 1s penetrating from the fin forming surface 1c to the through hole 1d may be formed. That is, a plurality of second through holes 1s may be formed between the fins 1a adjacent in the left-right direction. In the example shown in FIG. 8B, the second through hole 1s is formed substantially parallel to the front-rear direction. Further, the second through-hole 1s is formed at one place in the left-right direction in each through-hole 1d when viewed from the vertical direction.

  Further, when the through hole 1d is formed between the fins 1a adjacent in the left-right direction when viewed from the front-rear direction, the through-hole is formed from the fin forming surface 1c to the through hole 1d as shown in FIG. 8C. A plurality of second through holes 1t, 1u may be formed. That is, a plurality of second through holes 1t and 1u may be formed between the fins 1a adjacent in the left-right direction. In the example shown in FIG. 8C, the second through hole 1t is formed so as to be inclined at a predetermined angle with respect to the front-rear direction when viewed from the vertical direction, and the second through hole 1u is viewed from the vertical direction. Are inclined at a predetermined angle with respect to the front-rear direction and inclined in the direction opposite to the second through-hole 1t. Further, the second through holes 1t and 1u are formed so as to be adjacent to each other in the left and right directions in each through hole 1d when viewed in the vertical direction.

  Specifically, the compressed air passing through the second through hole 1t hits the side surface of one fin 1a of the two fins 1a disposed on both sides of the second through hole 1t, 1u in the left-right direction, and the second through hole The second through holes 1t, 1u are formed so that the compressed air passing through 1u hits the side surfaces of the other fin 1a of the two fins 1a disposed on both sides of the second through holes 1t, 1u in the left-right direction. Yes. In this case, the compressed air blown out from the second through holes 1t and 1u can be applied to both side surfaces of the fin 1a. In this case, the compressed air blown from the second through holes 1t and 1u can be applied to all the eight fins 1a. Therefore, it becomes possible to cool the fin 1a more efficiently.

  In this case, a pressure regulating valve (not shown) is disposed between the supply source 3 and the through hole 1d, and noise generated when compressed air blows out from the second through holes 1t and 1u is reduced. Therefore, it is preferable to adjust the pressure of the compressed air blown out from the second through holes 1t and 1u. Further, as shown in FIG. 1, when the base portion 1b is integrally formed, a plurality of second through holes 1s or second through holes 1t, 1u penetrating from the fin forming surface 1c to the through hole 1d are formed. May be.

  Further, in the example shown in FIG. 8A, the second, fourth, and sixth through holes 1d from the left of FIG. 8A may not be formed. Even in this case, if a plurality of second through holes 1t and 1u are formed, the compressed air blown from the second through holes 1t and 1u can be applied to all the eight fins 1a. Therefore, it becomes possible to cool the fin 1a more efficiently.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the embodiment described above, the through hole 1d is formed so as to penetrate the base portion 1b in the vertical direction. In addition, for example, the through hole 1d may be formed so as to penetrate the base 1b in the left-right direction. In this case, the plurality of through holes 1d are formed at substantially equal intervals in the vertical direction.

  In the embodiment described above, the piping member 4 is composed of a metal joint and a tube made of rubber or the like connected to the joint. In addition, for example, the piping member 4 may be composed of a metal joint and a metal tube connected to the joint. In this case, the tube is preferably formed of a metal having excellent thermal conductivity such as copper. As described above, when the tube is formed of a metal having excellent thermal conductivity, heat can be dissipated using the tube, so that the heat dissipation efficiency of the heat dissipation system 2 can be increased.

  In the above-described form, the radiator 1 is an instrument for dissipating heat from an industrial servomotor and its circuit board. However, the radiator to which the configuration of the present invention is applied is the heat of other heat generating objects. It may be a device for dissipating.

DESCRIPTION OF SYMBOLS 1 Heat radiator 1a Fin 1b Base 1c Fin formation surface 1d Through-hole 1e 1st base 1f 2nd base 1r, 1s, 1t, 1u 2nd through-hole 2 Heat radiation system 3 Supply source 4 Piping member P Split surface X Left-right direction (fin Thickness direction)
Y Longitudinal direction (direction in which the fin rises)

Claims (10)

It is formed of a heat dissipating material having heat dissipating properties, and includes a plurality of heat dissipating fins and a base to which the bases of the plurality of fins are connected,
The plurality of fins are formed to rise from the base,
The radiator having a plurality of through holes formed in the base portion so as to penetrate the base portion in a direction substantially perpendicular to a direction in which the fin rises.   2. The radiator according to claim 1, wherein the through hole penetrates the base portion in a direction orthogonal to a direction in which the fin rises and a thickness direction of the fin.   The base is composed of a first base connected to the bases of the plurality of fins, and a second base that can be divided from the first base with a dividing surface passing through the plurality of through holes as a boundary. The heat radiator according to claim 2.   4. The base according to claim 1, wherein a plurality of second through holes penetrating from the fin forming surface of the base where the plurality of fins are formed to the through hole are formed in the base. The heatsink described in Crab.   5. A heat dissipation system comprising: the radiator according to claim 1; a supply source of compressed air; and a piping member for supplying compressed air from the supply source to the through hole. .   The heat dissipation system according to claim 5, wherein the piping member is connected in series to the plurality of through holes so that compressed air from the supply source sequentially passes through the plurality of through holes.   The heat dissipation system according to claim 5, wherein the piping member is connected in parallel to the plurality of through holes so that the compressed air from the supply source passes through the plurality of through holes together. In the base, a plurality of second through holes penetrating from the fin forming surface of the base where the plurality of fins are formed to the through hole are formed,
The heat dissipation system according to any one of claims 5 to 7, wherein the plurality of second through holes are formed such that compressed air passing through the second through holes hits the side surfaces of the fins.   The plurality of second through holes are formed between the plurality of fins, and the two fins in which compressed air passing through the second through holes is disposed on both sides of the plurality of second through holes. The heat dissipation system according to claim 8, wherein the heat dissipation system is formed so as to be in contact with each of the side surfaces.   The heat dissipation system according to claim 8 or 9, further comprising a pressure regulating valve disposed between the supply source and the through hole.

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