This application is based upon and claims the benefit of priority of the prior Japanese Patent Application No. 2014-221485, filed on Oct. 30, 2014, the entire contents of which are incorporated herein by reference.
The embodiments discussed herein are related to a cooling device and an electronic apparatus.
There is a circulation type heat pipe which forms a circulation flow path configured of an evaporating section, a condensing section, a vapor tube, and a liquid return tube, and is provided with a wick and a liquid flow path on an inside of the liquid return tube.
Furthermore, there is a heat radiation structure of a cooling device which includes a heat absorber and a heat radiator, a first pipe, and a second pipe, in which the second pipe includes a capillary structure.
Furthermore, there is a loop heat pipe which includes an evaporating section, a condensing section, a vapor tube, and a liquid return tube, and is provided with a wick on insides of the evaporating section, the condensing section, and the liquid return tube.
Furthermore, there is a loop type heat pipe in which an evaporating tube and a liquid tube coupling an evaporator and a condenser are configured of an elastic body and have flexibility.
Furthermore, there is a heat pipe in which a wick within a sealed container formed of a flexible cable passing through respective insides of a heat receiving plate and a heat radiation plate is formed of a braided wire having elasticity.
Japanese Laid-open Patent Publication No. 11-95873, Japanese Registered Utility Model No. 3169627, Japanese Laid-open Patent Publication No. 2008-281275, Japanese Laid-open Patent Publication No. 11-95873, and Japanese Laid-open Patent Publication No. 2007-108228 are examples of the related art.
According to an aspect of the invention, a cooling device includes a heat receiver in which a working fluid is enclosed, a heat sink in which the working fluid is enclosed, an air tube made of metal so as to have flexibility, the air tube coupling the heat receiver and the heat sink, the air tube in which the working fluid of a gas phase flows through, and a liquid tube made of metal so as to have flexibility, the liquid tube coupling the heat receiver and the heat sink, the liquid tube in which the working fluid of a liquid phase flows through.
The object and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the claims.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, as claimed.
In a cooling device that circulates a working fluid by coupling (or connecting) a heat receiving section (or a heat receiver) and a heat radiation section (or a heat sink) by an air tube and a liquid tube, it is preferable to suppress leakage of the working fluid to the outside caused by passing through the air tube and the liquid tube.
Furthermore, it is preferable that a degree of freedom in arrangement of the heat receiving section and the heat radiation section is increased depending on an arrangement location of the cooling device.
An object of one aspect of a disclosed technique of this application is to increase the degree of freedom of the arrangement of the heat receiving section and the heat radiation section and suppress leakage of the working fluid caused by passing through the air tube and the liquid tube.
A first embodiment will be described with reference to the drawings.
As illustrated in
The heat receiving section 14 has a heat receiving plate 22 having a flat rectangular parallelepiped shape. Also as illustrated in
The heat receiving plate 22 of the embodiment has an upper plate 26 and a lower plate 28. The upper plate 26 and the lower plate 28 respectively have a rectangular shape of the same size when viewed in a normal direction.
The outer periphery portions of the upper plate 26 and the lower plate 28 are provided with edge portions 30 protruding in a thickness direction. The upper plate 26 and the lower plate 28 are integrated and the storage section 24 is formed between the upper plate 26 and the lower plate 28 by joining tips of the edge portions 30 together.
The upper plate 26 and the lower plate 28 are provided with concave sections 26H and 28H at positions to which the air tube 18 is coupleed. Furthermore, the upper plate 26 and the lower plate 28 are provided with concave sections 27H and 29H at positions to which the liquid tube 20 is coupleed.
In the heat receiving section 14 of the rectangular parallelepiped shape, one or both of two surfaces having the largest area is a heat receiving surface 34 receiving heat from an electronic component 106 (see
A wick 36 is disposed within the storage section 24 of the heat receiving plate 22. The wick 36 is formed, for example, by knitting filamentous or thin linear metal or resin and exerts a capillary force on the working fluid WF if the wick 36 comes into contact with the working fluid WF of a liquid phase.
As illustrated in
The heat radiation section 16 has a heat radiation plate 42 having a flat rectangular parallelepiped shape. Also as illustrated in
The heat radiation plate 42 of the embodiment has an upper plate 46 and a lower plate 48. The upper plate 46 and the lower plate 48 respectively have a rectangular shape of the same size when viewed in a normal direction.
The outer periphery portions of the upper plate 46 and the lower plate 48 are provided with edge portions 50 protruding in a thickness direction. The upper plate 46 and the lower plate 48 are integrated and the storage section 44 is formed between the upper plate 46 and the lower plate 48 by joining tips of the edge portions 50 together.
The upper plate 46 and the lower plate 48 are provided with concave sections 46H and 48H at positions to which the air tube 18 is coupleed. Furthermore, the upper plate 46 and the lower plate 48 are provided with concave sections 47H and 49H at positions to which the liquid tube 20 is coupleed.
In the heat radiation section 16 of the rectangular parallelepiped shape, one or both of two surfaces having the largest area is a heat radiating surface 54. The working fluid WF of a gas phase within the storage section 24 is liquefied by radiating heat from the heat radiating surface 54.
In the embodiment, as illustrated in
As the heat radiation element, a thermoelectric element such as a Peltier element, a metal block having a large heat capacity, and the like can be exemplified in addition to the fin member 56. The heat radiation element can be mounted on an outer surface of at least one of the upper plate 46 and the lower plate 48.
As illustrated in
As illustrated in
As illustrated in
As indicated by arrow F1 in
As illustrated in
Furthermore, a thin walled section 66 that is continuous from the thick walled section 64 and is thinner than the thick walled section 64 is formed between the thick walled sections 64 when viewed from the cross section illustrated in
The thick walled section 64 and the thin walled section 66 of the air tube 18 are integrated and a gap is not present between the thick walled section 64 and the thin walled section 66. Thus, the working fluid WF flowing through the inside of the air tube 18 is not leaked to the outside.
The inside of the air tube 18 is the cavity 68.
As illustrated in
Furthermore, a thin walled section 76 that is continuous from the thick walled section 74 and is thinner than the thick walled section 74 is formed between the thick walled sections 74. The thin walled section 76 is more easily deformed than the thick walled section 74. Then, the liquid tube 20 expands and contracts along the longitudinal direction by deformation of the thin walled section 76. The liquid tube 20 has flexibility (flexibility in the direction intersecting the longitudinal direction) capable of bending at a desired position by partially generating the expansion and contraction in the thin walled section 76.
The thick walled section 74 and the thin walled section 76 of the liquid tube 20 are integrated and a gap is not present between the thick walled section 74 and the thin walled section 76. Thus, the working fluid WF flowing through the inside of the liquid tube 20 is not leaked to the outside.
The inside of the liquid tube 20 is filled with the wick 36. The wick 36 is a member exerting capillary force on the liquid. That is, the wick 36 exerts capillary force on the working fluid WF of the liquid phase within the liquid tube 20 and moves the working fluid WF from the heat radiation section 16 to the heat receiving section 14.
As illustrated in
The wick 36 is not specifically limited as long as capillary force can be exerted on the working fluid WF of the liquid phase. For example, if a wick made of glass fiber is used, it is possible to follow bending of the liquid tube 20 and to maintain a state of filling the liquid tube 20. For example, it is possible to use a wick formed of a metal mesh, a metal-powder sintered body, and the like in addition to glass fiber.
As illustrated in
Furthermore, the air tube 18 and the liquid tube 20 are coupleed to an end surface 42T of the heat radiation plate 42. The end surface 42T is one of four surfaces other than the two surfaces having the largest area in the heat radiation plate 42.
As illustrated in
For example, the housing 104 is formed in a box shape and protects the electronic component 106 from an external environment (weather, a temperature change, a humidity change, and the like) when the electronic apparatus 102 is installed outdoors. As an example of such an electronic apparatus, a base station of a mobile phone may be exemplified. The electronic apparatus 102 may be installed indoors.
A structure fixing the electronic component 106 to the inside of the housing 104 is not limited. In the example illustrated in
The heat receiving section 14 of the cooling device 12 is disposed on an inside of the housing 104. On the other hand, the heat radiation section 16 of the cooling device 12 is disposed on an outside of the housing 104. Particularly, in the example illustrated in
The heat receiving plate 22 is disposed such that the heat receiving surface 34 faces the electronic apparatus 102 or comes into contact with the electronic apparatus 102. Furthermore, the heat receiving plate 22 is disposed such that the end surface 22T to which the air tube 18 and the liquid tube 20 are coupleed faces downward.
The heat radiation plate 42 is disposed such that the fin bodies 60 of the fin member 56 face upward and the end surface 42T to which the air tube 18 and the liquid tube 20 are coupleed faces the housing 104.
A wall portion 108 of the housing 104 is provided with through holes 110. The air tube 18 and the liquid tube 20 are inserted into the through holes 110. In the embodiment, a bushing 112 is disposed between the air tube 18 and the through hole 110 and a bushing 114 is disposed between the liquid tube 20 and the through hole 110.
The bushings 112 and 114 are an example of a sealing member. Specifically, the bushing 112 comes into contact with the outer periphery of the air tube 18 and a hole wall of the through hole 110, and suppresses entering of foreign matter such as liquid including rainwater and dust from a gap between the air tube 18 and the through hole 110 into the housing 104. Similarly, the bushing 114 comes into contact with the outer periphery of the liquid tube 20 and a hole wall of the through hole 110, and suppresses entering of foreign matter such as liquid including rainwater and dust from a gap between the liquid tube 20 and the through hole 110 into the housing 104.
Next, an operation of the embodiment will be described.
As illustrated in
The air tube 18 and the liquid tube 20 have flexibility in the direction intersecting the longitudinal direction. Thus, the air tube 18 and the liquid tube 20 can be bent at a desired position and a degree of freedom of arrangement of the heat receiving section 14 and the heat radiation section 16 is increased.
Specifically, the heat receiving plate 22 of the heat receiving section 14 is disposed in a vertical direction and the heat radiation plate 42 of the heat radiation section 16 is disposed in a horizontal direction. In addition to this example, the heat receiving section 14 and the heat radiation section 16 may adopt various arrangements. For example, the heat receiving plate 22 may be disposed in the horizontal direction and the heat radiation plate 42 may be disposed in the vertical direction. Furthermore, one or both of the heat receiving plate 22 and the heat radiation plate 42 may be disposed to be inclined.
Particularly, various components in addition to the electronic component 106 may be disposed on the inside of the housing 104. Then, it is preferable that heat is efficiently received from the electronic component 106 by the heat receiving section 14 (heat receiving plate 22) while avoiding those components. In the embodiment, since the degree of freedom of the arrangement of the heat receiving section 14 is increased, other components are avoided and the position and the posture of the heat receiving plate 22 capable of efficiently receiving heat from the electronic component 106 may be taken.
For example, there may be a building wall, various external cables, and the like (collectively referred to as “external member”) on the outside of the housing 104 depending on a location in which the electronic apparatus 102 is disposed. Then it is preferable that heat is efficiently radiated by the heat radiation section 16 (heat radiation plate 42) while avoiding the external member. In the embodiment, since the degree of freedom of the arrangement of the heat radiation section 16 is increased, the external member is avoided and the position and the posture of the heat radiation section 16 capable of efficiently radiating heat may be taken.
Furthermore, when assembling the cooling device 12 to the housing 104, the degree of freedom of the arrangement of the heat receiving section 14 and the heat radiation section 16 is also increased. That is, since the positions of the heat receiving section 14 and the heat radiation section 16 are not fixed, assembly work is easy.
Then, a degree of freedom of a relative position between the heat receiving section 14 and the heat radiation section 16 is also increased. For example, in the example illustrated in
The working fluid WF flows through the insides of the air tube 18 and the liquid tube 20. Since the air tube 18 and the liquid tube 20 are made of metal, for example, coming out of the working fluid WF is suppressed compared to a case where the air tube and the liquid tube are made of resin. Since the working fluid WF can be maintained in a state of being sealed on the inside of the cooling device 12, it is possible to maintain cooling performance of the cooling device 12 over a long period of time.
Moreover, as the structure having flexibility described above in the air tube 18 and the liquid tube 20, in the embodiment, a structure in which the tube walls 62 and 72 have the thick walled sections 64 and 74, and the thin walled sections 66 and 76 is exemplified. In order to impart flexibility to the air tube 18 and the liquid tube 20, for example, a structure having only the thin walled sections 66 and 76 may be provided. However, in a structure not having the thick walled sections 64 and 74, it is difficult to stably maintain the air tube 18 and the liquid tube 20 in desired shapes. That is, as the air tube 18 and the liquid tube 20, it is possible to achieve both flexibility and shape stability by providing the structure having both the thick walled sections 64 and 74, and the thin walled sections 66 and 76.
Furthermore, as illustrated in
However, a structure in which the thick walled sections 64 and 74, and the thin walled sections 66 and 76 are not completely integrated is applicable. For example, first, the thick walled sections of the spiral shape are formed, a portion between the thick walled sections is coupleed by the thin walled section in a later step, and then it is possible to obtain the cylindrical air tube 18 and liquid tube 20 as a whole.
In the embodiment, as illustrated in
In the embodiment, the liquid tube 20 is filled with the wick 36. The wick 36 exerts capillary force on the liquid. Thus, even if gravity acts on the working fluid WF in the direction opposite to the direction in which the working fluid WF returns from the heat radiation section 16 to the heat receiving section 14, it is possible to return the working fluid WF from the heat radiation section 16 to the heat receiving section 14 by decreasing the influence of gravity.
For example, if the end surface 42T of the heat radiation plate 42 faces upward, a part of the liquid tube 20 on the heat radiation plate 42 side has a posture extending upward from the heat radiation plate 42. The working fluid WF of the liquid phase moving from the heat radiation section 16 to the heat receiving section 14 receives gravity in a direction opposite to the moving direction in an initial step of the movement. Even in this case, since the wick 36 within the liquid tube 20 exerts capillary force on the working fluid WF of the liquid phase, it is possible to move the working fluid WF to the heat radiation section 16. That is, it is possible to make the working fluid WF flow into the liquid tube 20 regardless of the orientation or the posture of the heat radiation section 16.
Moreover, the air tube 18 is not filled with the wick 36 and the cavity 68 is present within the air tube 18. Thus, a pressure loss in the air tube 18 is greater than that in the liquid tube 20. In other words, resistance in the liquid tube 20 when the fluid flows through the inside thereof is greater than that in the air tube 18. Thus, the vaporized working fluid WF within the heat receiving section 14 is likely to flow through the air tube 18 but is unlikely to flow through the liquid tube 20. That is, it is possible to realize a one-way circulation flow path in which the working fluid WF (gas) from the heat receiving section 14 to the heat radiation section 16 flows through the air tube 18 and the working fluid WF (liquid) from the heat radiation section 16 to the heat receiving section 14 flows through the liquid tube 20.
As illustrated in
Particularly, the wick 36 is disposed along the upper plate 26. That is, since the wick 36 is disposed to be spread at a position close to the heat receiving surface 34 in the storage section 24, it is possible to diffuse the working fluid WF along the heat receiving surface 34. Since heat is received in a wide surface by the diffused working fluid WF, it is possible to efficiently vaporize the working fluid WF.
As illustrated in
Particularly, it is possible to employ a structure in which the wick 36 within the liquid tube 20 is continuous to the wick 36 within the storage section 44 and the wick within the storage section 24. Thus, the working fluid WF liquefied within the storage section 44 smoothly moves to the wick 36 within the liquid tube 20 and moves to the wick 36 within the storage section 24. That is, the working fluid WF within the storage section 44 smoothly moves within the storage section 24.
In the embodiment, as illustrated in
Furthermore, as illustrated in
Moreover, it is possible to employ a structure illustrated in
In an electronic apparatus 122 of the second embodiment, a through hole 124 is formed in a wall portion 108 of a housing 104. The through hole 124 is greater than an outer shape of a heat receiving plate 22 when viewed the heat receiving plate 22 in an arrow direction Al. The arrow direction Al is the same direction as a direction in which an air tube 18 and a liquid tube 20 exit from an end surface 22T of the heat receiving plate 22. Then, it is possible to insert the heat receiving plate 22 from the outside to the inside of the housing 104 in a direction opposite to the arrow direction Al.
A lid plate 126 is mounted on the housing 104 from the outside of the housing 104. The through hole 124 is closed by lid plate 126.
Through holes 128 and 130 through which the air tube 18 and the liquid tube 20 pass respectively are formed in lid plate 126. Then, coupleors 132 and 134 are disposed between the air tube 18 and the liquid tube 20, and the through holes 128 and 130.
Lid plate 126 and the coupleors 132 and 134 are an example of a sealing member. Lid plate 126 and the coupleor 132 suppress entering of foreign matters such as the liquid including rainwater and dust from a portion between the air tube 18 and the through hole 124 into the housing 104. Similarly, lid plate 126 and the coupleor 132 suppress entering of the foreign matters such as the liquid including rainwater and dust from a portion between the liquid tube 20 and the through hole 124 into the housing 104.
In the second embodiment, for example, in a state where lid plate 126 is mounted through the coupleors 132 and 134 in the middle of the air tube 18 and the liquid tube 20, it is possible to make the heat receiving section 14 pass through the through hole 124 from the outside of the housing 104 and to dispose the heat receiving section 14 within the housing 104. The lid plate 126 is fixed to the wall portion 108 so as to block the through hole 124.
As described above, the second embodiment has the structure in which the heat receiving plate 22 can pass through the through hole 124. Thus, it is possible to form the cooling device 12 by assembling the heat receiving section 14, the heat radiation section 16, the air tube 18, and the liquid tube 20 in advance, to dispose the heat receiving section 14 of the cooling device 12 within the housing 104 through the through hole 124, and to easily perform assembling work of the cooling device 12 to the housing.
Furthermore, it is possible to suppress entering of the foreign matters such as the liquid including rainwater and dust from the outside of the housing 104 into the housing 104 with a simple structure in which the coupleors 132 and 134 are mounted on lid plate 126.
Next, a third embodiment will be described. In the third embodiment, the same reference numerals are given to the same elements, members, and the like as the first embodiment and detailed description will be omitted.
As illustrated in
The case 144 has an upper plate 148 and a lower plate 150. As illustrated in
The upper plate 148 and the lower plate 150 are provided with concave sections 148H and 150H at positions through which the air tube 18 passes. Furthermore, the upper plate 148 and the lower plate 150 are provided with concave sections 149H and 151H at positions in which a liquid tube cover 166 is disposed.
A fin member 158 is mounted on an outer surface of the upper plate 148 of the case 144. In the example illustrated in
Furthermore, in the third embodiment, as illustrated in
As illustrated in
As illustrated in
As illustrated in
A tip of the air tube cover 164 passes through the through hole 110 of the housing 104 and is positioned on the inside (right side of the wall portion 108 in
A sealing member 172 seals between an outer periphery of the air tube cover 164 and the through hole 110 within the housing 104. As an example of the sealing member 172, an annular packing and the like can be exemplified.
A base end (end portion on the case 144 side) of the air tube cover 164 is sealed by the case 144. Air is sealed on an inside of the air tube cover 164, that is, a space 174 between the air tube cover 164 and the air tube 18.
As illustrated in
A tip of the liquid tube cover 166 passes through the through hole 110 of the housing 104 and is positioned on the inside (right side of the wall portion 108 in
The sealing member 172 seals between the outer periphery of the liquid tube cover 166 and the through hole 110.
In a base end (end portion on the case 144 side) of the liquid tube cover 166, a gap is generated between the concave sections 149H and 151H, and the liquid tube 20. The inside of the liquid tube cover 166, that is, a space 178 between the liquid tube cover 166 and the liquid tube 20 is communicates with a space 176 on an inside of the case 144.
Moreover, in
Furthermore, in the third embodiment, as illustrated in
Similarly, it is a structure in which a thick walled section 184 and a thin walled section 186 are formed in the liquid tube cover 166, and which has flexibility. Thus, the liquid tube cover 166 is also deformed together with the liquid tube 20.
As illustrated in
In the third embodiment, as described above, the heat radiation section 16 is covered by the case 144. If the heat radiation section 16 is disposed on the outside of the housing 104, it is possible to efficiently radiate heat by taking the outside temperature, but the heat radiation section 16 is exposed to the external environment. On the other hand, if the heat radiation section 16 is covered by the case 144, even if the heat radiation section 16 is disposed on the outside of the housing 104, it is possible to suppress corrosion and damage of the heat radiation section 16 over a long period of time. In other words, it is possible to dispose the heat radiation section 16 on the outside of the housing 104 and to efficiently radiate heat from the heat radiation section 16 to the external air by suppressing corrosion and damage of the heat radiation section 16.
Furthermore, in the third embodiment, a part (portion on the heat radiation section 16 side) of the air tube 18 is covered by the air tube cover 164. If the heat radiation section 16 is disposed on the outside of the housing 104, a part of the air tube 18 is also positioned on the outside of the housing 104. As described above, even if a part of the air tube 18 is positioned on the outside of the housing 104, it is possible to suppress corrosion and damage of the air tube 18 over a long period of time.
Furthermore, in the third embodiment, a part (portion on the heat radiation section 16 side) of the liquid tube 20 is covered by the liquid tube cover 166. If the heat radiation section 16 is disposed on the outside of the housing 104, a part of the liquid tube 20 is also positioned on the outside of the housing 104. As described above, even if a part of the liquid tube 20 is positioned on the outside of the housing 104, it is possible to suppress corrosion and damage of the liquid tube 20 over a long period of time.
In the third embodiment, the phase-change fluid PF is enclosed in the space 176. Thus, the phase-change fluid PF is vaporized by heat of the heat radiation section 16. Thus, it is possible to promote heat radiation from the heat radiation section 16 compared to a structure the phase-change fluid PF is not present in the space 176.
In the third embodiment, the phase-change fluid PF is enclosed in the space 178. Thus, the phase-change fluid PF is vaporized by heat of the liquid tube 20. Thus, it is possible to promote heat radiation from the liquid tube 20 compared to a structure the phase-change fluid PF is not present in the space 178.
Furthermore, in the third embodiment, as illustrated in
Particularly, since the liquid tube cover 166 has the thick walled section 184 and the thin walled section 186, for example, a surface area is wide compared to a structure which does not have the thick walled section 184. In other words, the thick walled section 184 functions as the radiation fin and it is possible to efficiently radiate heat with a wide area.
Materials of the case 144, the air tube cover 164, and the liquid tube cover 166 are not specifically limited from the viewpoint of suppressing corrosion or damage of the heat radiation section 16, the air tube 18, and the liquid tube 20.
However, as described above, in the structure in which the phase-change fluid PF is enclosed on the inside of the case 144 and the inside of the liquid tube cover 166, if the case 144 and the liquid tube cover 166 are made of metal, it is possible to suppress coming out of the phase-change fluid PF.
In this case, if metal is aluminum or aluminum alloy, it is possible to achieve both light weight and corrosion resistance. Particularly, in a case of aluminum alloy of MS symbol A6063, it is possible to suppress damage due to rust and the like, and to maintain the structure of the case 144 and the liquid tube cover 166 over a long period of time.
In the third embodiment, as described above, the portion positioned on the outside of the housing 104 is covered by the case 144, the air tube cover 164, and the liquid tube cover 166, and thereby corrosion is suppressed. Thus, for the heat radiation section 16, the air tube 18, and the liquid tube 20, it is possible to use a material having a low corrosion resistance if the heat radiation section 16, the air tube 18, and the liquid tube 20 are exposed to the external air, for example, to use copper and the like.
As illustrated in
Next, a fourth embodiment will be described. In the fourth embodiment, the same reference numerals are given to the same elements, members, and the like as the first embodiment and detailed description will be omitted. Moreover, as the cooling device, an example using the cooling device 12 of the first embodiment is illustrated in
In the electronic apparatus 202 of the fourth embodiment, as illustrated in
In the fourth embodiment, in the example illustrated in
Next, a fifth embodiment will be described. In the fifth embodiment, the same reference numerals are given to the same elements, members, and the like as the first embodiment and detailed description will be omitted. Moreover, in the fifth embodiment, as the electronic apparatus, since the same structure as the electronic apparatus 102 (see
As illustrated in
As described above, if the air tube 214 and the liquid tube 216 are formed in the spiral shape as a whole, not only deformation according to expansion and contraction of the thin walled section 66 but also deformation according to deflection as an entire tube is generated. However, in the fifth embodiment, since the air tube and the liquid tube are long compared to those of the first embodiment to the fourth embodiment, pressure loss is increased. Furthermore, a wide space is occupied as much as the air tube and the liquid tube are formed in the spiral shape as a whole. On the other hand, in the first embodiment to the fourth embodiment, it is possible to suppress the pressure an increase in loss of the air tube and the liquid tube, and to narrow the space occupied by the air tube and the liquid tube.
In the above description, as the heat receiving section 14, a structure having the heat receiving plate 22 formed in a plate shape is exemplified. As the heat receiving section, a shape other than the plate shape may be provided. However, if it is the plate shape, it is possible to easily realize the structure having a wide surface (heat receiving surface 34) receiving heat by coming into contact with the electronic component 106.
Furthermore, the inside of the heat receiving plate 22 is hollow and thereby it is possible to ensure the space for enclosing the working fluid WF with a simple structure.
In the heat receiving plate 22, the air tube 18 and the liquid tube 20 are coupleed to an end surface 22T of the heat receiving plate 22. Since the air tube 18 and the liquid tube 20 avoid a wide surface in the heat receiving plate 22, it is possible to efficiently use the wide surface as the heat receiving surface 34 and to make the wide surface come into contact with the electronic component 106. For example, two wide surfaces are present in the heat receiving plate 22 and it is also possible to employ a structure in which heat of the electronic component is received by the two surfaces.
Similarly, in the above description, as the heat radiation section 16, a structure having the heat radiation plate 42 formed in the plate shape is exemplified. As the heat radiation section 16, shapes other than the plate shape may be provided, but if the heat radiation section 16 has the plate shape, the surface area is large compared to a volume and it is possible to easily realize a structure that is advantageous in heat radiation.
Furthermore, the inside of the heat radiation plate 42 is hollow and thereby it is possible to ensure the space for enclosing the working fluid WF with a simple structure.
In the heat radiation plate 42, the air tube 18 and the liquid tube 20 are coupleed to an end surface 42T of the heat radiation plate 42. Since the air tube 18 and the liquid tube 20 avoid a wide surface in the heat radiation plate 42, when mounting the heat radiation element (for example, the fin member 56 illustrated in
All examples and conditional language recited herein are intended for pedagogical purposes to aid the reader in understanding the invention and the concepts contributed by the inventor to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions, nor does the organization of such examples in the specification relate to a showing of the superiority and inferiority of the invention. Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.
Number | Date | Country | Kind |
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2014-221485 | Oct 2014 | JP | national |