Heat sinks and cooling units

Abstract

Heat dissipation device and cooling unit. The heat dissipation device has first and second radiators, a first tank connected to one side of the first direction of each of the first and second radiators, and a second tank connected to the other side of the first direction. Coolant flows inside the first radiator, the second radiator, the first tank, and the second tank. The first tank has a first tank-side outlet for the coolant to flow out to the first cooling device and a first tank-side inlet for the coolant from the first cooling device to flow in. The second tank has a second tank-side outlet for the coolant to flow out to the second cooling device and a second tank-side inlet for the coolant from the second cooling device to flow in. In the first radiator, the coolant flowing in from the first tank-side inlet flows from one side of the first direction to the other side of the first direction and flows out from the second tank-side inlet. In the second radiator, the coolant flowing in from the second tank-side inlet flows from the other side of the first direction to one side of the first direction and flows out from the first tank-side outlet.

Description

Technical Field

[0001] The invention relates to a heat dissipation device and a cooling unit. Background Art

[0002] In the past, there is a known cooling device that is connected to a cooling plate, a radiator such as a condenser, and a pump in order to cool a heat generating body such as a semiconductor element, so that a coolant flows in the cycle (for example, Patent Document 1: Japanese Patent Application Publication No. 2003-318341). The cooling device of Patent Document 1 has two cooling plates and two condensers, and forms a flow path of the refrigerant by sequentially connecting the two cooling plates, the two condensers, and the refrigerant pump in series.

[0003] In the cooling device of Patent Document 1, two cooling plates are directly connected. Therefore, after the refrigerant passes through one cooling plate and absorbs heat, it flows through the other cooling plate. Therefore, sometimes, even if the refrigerant cooled in the condenser can sufficiently cool the first cooling plate, it cannot sufficiently cool the second cooling plate. Summary of the invention

[0004] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a heat sink and a cooling unit suitable for efficiently cooling a plurality of heat-generating components.

[0005] An exemplary heat sink of the present invention allows a coolant to flow in and out of a first cooling device and a second cooling device. The heat sink includes: a first radiator; a second radiator; a first tank connected to one side of each of the first radiator and the second radiator in the first direction; and a second tank connected to the other side of each of the first radiator and the second radiator in the first direction. The coolant flows inside the first radiator, the second radiator, the first tank, and the second tank. The first tank includes a tank-side first outlet and a tank-side first inlet, the tank-side first outlet allows the coolant to flow out to the first cooling device, and the tank-side first inlet allows the coolant from the first cooling device to flow in. The second tank includes a tank-side second outlet and a tank-side second inlet, the tank-side second outlet allows the coolant to flow out to the second cooling device, and the tank-side second inlet allows the coolant from the second cooling device to flow in. In the first radiator, the coolant flowing in from the tank-side first inlet flows from one side of the first direction to the other side of the first direction, and flows out from the tank-side second outlet. In the second radiator, the coolant flowing in from the tank-side second inlet flows from the other side of the first direction to one side of the first direction, and flows out from the tank-side first outlet.

[0006] An exemplary cooling unit of the present invention includes the heat sink described above, the first cooling device, and the second cooling device. In a third direction perpendicular to the first direction and the second direction, the second heat sink, the first heat sink, and the first cooling device or the second cooling device are arranged in this order.

[0007] According to the exemplary present invention, it is possible to provide a heat sink and a cooling unit suitable for efficiently cooling a plurality of heat generating components. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of a cooling unit having the heat dissipation device of the present invention.

[0009] Figure 2 Schematic diagram of a cooling unit having the heat dissipation device of the present invention.

[0010] Figure 3 It is an overall perspective view of a cooling unit having a heat sink according to an exemplary first embodiment of the present invention.

[0011] Figure 4A It is a partial perspective view of the vicinity of the first tank of the heat sink according to the exemplary first embodiment of the present invention.

[0012] Figure 4B This is a cross-sectional perspective view when the first tank of the heat sink according to the exemplary first embodiment of the present invention is cut along the second direction.

[0013] Figure 5A It is a partial perspective view of the vicinity of the second tank of the heat sink according to the exemplary first embodiment of the present invention.

[0014] Figure 5B This is a cross-sectional perspective view of the second tank of the heat sink according to the exemplary first embodiment of the present invention when it is cut along the second direction.

[0015] Figure 6 This is a cross-sectional perspective view of the heat sink according to the exemplary first embodiment of the present invention when it is cut along the second direction.

[0016] Figure 7 It is a schematic cross-sectional perspective view of a heat sink according to an exemplary first embodiment of the present invention.

[0017] Fig. 8A is a schematic side view of a cooling unit according to the exemplary first embodiment of the present invention.

[0018] Figure 8B It is a schematic perspective view of a cooling unit according to the exemplary first embodiment of the present invention.

[0019] Fig. 9 It is an overall perspective view of a cooling unit having a heat sink according to an exemplary second embodiment of the present invention.

[0020] Fig.10 It is a schematic cross-sectional view of a heat sink according to an exemplary second embodiment of the present invention.

[0021] Fig.11A It is a partial perspective view of the vicinity of a first tank of a heat sink according to an exemplary second embodiment of the present invention.

[0022] Fig. 11B This is a cross-sectional perspective view of the heat sink according to the exemplary second embodiment of the present invention when it is cut along the second direction.

[0023] Fig. 12A It is a partial perspective view of the vicinity of the second tank of the heat sink according to the exemplary second embodiment of the present invention.

[0024] Fig. 12B It is a perspective view of the vicinity of the second tank of the heat sink according to the exemplary second embodiment of the present invention.

[0025] Fig.13 It is a schematic partially enlarged perspective view of a cooling unit according to an exemplary second embodiment of the present invention.

[0026] Fig.14 It is a schematic perspective view of a first cooling device of a cooling unit according to an exemplary second embodiment of the present invention.

[0027] Fig.15A It is a schematic plan view of the vicinity of the first cooling device of the cooling unit according to the exemplary second embodiment of the present invention.

[0028] Fig. 15B It is along Fig.15A Schematic cross-sectional view of line BB.

[0029] Fig. 15C It is along Fig.15A Schematic cross-sectional view of line CC.

[0030] Fig.16 This is an overall perspective view of a cooling unit according to an exemplary second embodiment of the present invention in a state where various fixing components are mounted.

[0031] Fig.17 This is a cross-sectional perspective view of the heat sink according to the exemplary second embodiment of the present invention when it is cut along the second direction. DETAILED DESCRIPTION

[0032] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in this specification, for easy understanding, mutually perpendicular first direction X, second direction Y, and third direction Z are appropriately described. Here, the direction in which the heat sink or cooling pipe extends is referred to as the "first direction X". In addition, the direction perpendicular to the first direction X is referred to as the "second direction Y". Furthermore, the direction perpendicular to the first direction X and the second direction Y is referred to as the "third direction Z".

[0033] In addition, the direction on one side of the first direction X is referred to as “the first direction one side (-X direction)”, and the direction on the other side is referred to as “the first direction other side (+X direction)”. The direction on one side of the second direction Y is referred to as “the second direction one side (-Y direction)”, and the direction on the other side is referred to as “the second direction other side (+Y direction)”. Furthermore, the direction on one side of the third direction Z is referred to as “the third direction one side (-Z direction)”, and the direction on the other side is referred to as “the third direction other side (+Z direction)”.

[0034] In addition, in the present application, for convenience, the second direction Y is sometimes used as the up and down direction for description. For example, one side of the second direction Y (-Y direction) represents the upper direction, and the other side of the second direction Y (+Y direction) represents the lower direction. However, the up and down directions, the upper direction, and the lower direction are determined for the convenience of description and do not need to be consistent with the vertical direction. In addition, the up and down directions are only defined for the convenience of description, and do not limit the orientation of the heat dissipation device and the cooling unit of the present invention when in use. In addition, in this specification, the "vertical direction" does not mean vertical in a strict sense, for example, it includes the situation where it is vertical to the extent that the effect of the present invention is exerted.

[0035] <First embodiment>

[0036] A heat sink B and a cooling unit A according to an exemplary first embodiment of the present invention will be described. Figure 1 It is a schematic diagram of a cooling unit A including a heat sink B according to the first embodiment. Figure 2 Schematic diagram of a cooling unit A having a heat sink B according to the first embodiment.

[0037] <Cooling unit>

[0038] like Figure 1 and Figure 2 As shown, the cooling unit A has a heat sink B, a first cooling device 3 and a second cooling device 4. The heat sink B has a first radiator 1, a second radiator 2, a first tank 5 and a second tank 6. The first tank 5 is located on one side of the first direction of the first radiator 1 and the second radiator 2 (-X direction), and the second tank 6 is located on the other side of the first direction of the first radiator 1 and the second radiator 2 (+X direction).

[0039] The cooling unit A further includes a first pipe 71, a second pipe 72, a third pipe 73, and a fourth pipe 74. One side of the first radiator 1 is connected to the first cooling device 3 through the first pipe 71. Specifically, one side of the first radiator 1 is connected to the first cooling device 3 through the first tank 5 through the first pipe 71. In addition, one side of the second radiator 2 is connected to the first cooling device 3 through the second pipe 72. Specifically, one side of the second radiator 2 is connected to the first cooling device 3 through the first tank 5 through the second pipe 72.

[0040] The other side of the first radiator 1 is connected to the second cooling device 4 through the third pipe 73. Specifically, the other side of the first radiator 1 is connected to the second cooling device 4 through the second tank 6 through the third pipe 73. In addition, the other side of the second radiator 2 is connected to the second cooling device 4 through the fourth pipe 74. Specifically, the other side of the second radiator 2 is connected to the second cooling device 4 through the second tank 6 through the fourth pipe 74.

[0041] The coolant returns to the radiator B from the second radiator 2 of the radiator B through the second pipe 72, the first cooling device 3, and the first pipe 71, and then passes through the first radiator 1 of the radiator B. Furthermore, the coolant returns to the radiator B from the first radiator 1 of the radiator B through the third pipe 73, the second cooling device 4, and the fourth pipe 74, and then passes through the second radiator 2 of the radiator B. Then, the coolant flows from the second radiator 2 of the radiator B again through the second pipe 72.

[0042] In the present embodiment, the coolant is a liquid and, as the coolant, for example, an antifreeze solution such as an ethylene glycol aqueous solution or a propylene glycol aqueous solution, or pure water or the like is used.

[0043] like Figure 2 As shown, the first cooling device 3 and the second cooling device 4 are in contact with the first heat-generating component R1 and the second heat-generating component R2 as heat sources, thereby absorbing heat from the first heat-generating component R1 and the second heat-generating component R2. As exemplary heat-generating components, power semiconductors such as microprocessors and inverters used in computers can be cited. The coolant that has absorbed heat in the first cooling device 3 and the second cooling device 4 flows toward the first radiator 1 and the second radiator 2 through the first piping 71 to the fourth piping 74. The coolant that has absorbed heat passes through the first radiator 1 and the second radiator 2, thereby dissipating heat from the coolant to the outside in the first radiator 1 and the second radiator 2.

[0044] More specifically, the coolant after heat dissipation in the second radiator 2 flows to the first cooling device 3 through the second pipe 72. The coolant after absorbing heat from the first heat generating component R1 in the first cooling device 3 flows to the first radiator 1 through the first pipe 71. Figure 2 When F1 flows through the first radiator 1, heat is dissipated from the coolant in the first radiator 1. The coolant that has dissipated heat in the first radiator 1 flows to the second cooling device 4 through the third pipe 73. The coolant that has absorbed heat from the second heat generating component R2 in the second cooling device 4 flows to the second radiator 2 through the fourth pipe 74. Figure 2 When F2 flows in the second radiator 2 , heat is dissipated from the coolant in the second radiator 2 .

[0045] In the cooling unit A, the coolant flows in the above-mentioned circulation, and the coolant that has absorbed heat in the first cooling device 3 dissipates heat in the first radiator 1, so that the cooled coolant flows into the second cooling device 4. Therefore, the deviation of the cooling performance in the first cooling device 3 and the second cooling device 4 can be suppressed.

[0046] The first tank 5 has a tank-side first flow outlet 5a and a tank-side first flow inlet 5b. In the first tank 5, the flow path opening of the second radiator 2 is connected to the tank-side first flow outlet 5a. In addition, in the first tank 5, the flow path opening of the first radiator 1 is connected to the tank-side first flow inlet 5b. In addition, in the first tank 5, the tank-side first flow outlet 5a is not directly connected to the tank-side first flow inlet 5b. In addition, in the first tank 5, the flow path opening of the first radiator 1 is not directly connected to the flow path opening of the second radiator 2.

[0047] Specifically, the first tank 5 has a plurality of tank chambers that are not directly connected to each other inside the first tank 5. For example, the first tank 5 has a first tank chamber 51 and a second tank chamber 52. The first tank chamber 51 and the second tank chamber 52 are partitioned by a first partition 5p.

[0048] The tank-side first outflow port 5a is connected to the second tank chamber 52. The tank-side first outflow port 5a may be provided in the second tank chamber 52. Alternatively, the tank-side first outflow port 5a may be communicated with the second tank chamber 52 via the second pipe 72.

[0049] The tank-side first inlet 5b is connected to the first tank chamber 51. The tank-side first inlet 5b may be provided in the first tank chamber 51. Alternatively, the tank-side first inlet 5b may be communicated with the first tank chamber 51 via the first pipe 71.

[0050] The coolant in the first tank 5 flows out from the tank-side first outlet 5a to the first cooling device 3. For example, the coolant in the first tank 5 flows from the second tank chamber 52 through the second pipe 72 and flows out from the tank-side first outlet 5a to the first cooling device 3. The coolant flowing through the first cooling device 3 flows through the first pipe 71 and flows into the first tank chamber 51 from the tank-side first inlet 5b. The coolant flowing into the first tank chamber 51 from the tank-side first inlet 5b flows in the first radiator 1.

[0051] The second tank 6 has a tank-side second flow outlet 6a and a tank-side second flow inlet 6b. In the second tank 6, the flow path opening of the first radiator 1 is connected to the tank-side second flow outlet 6a. In addition, in the second tank 6, the flow path opening of the second radiator 2 is connected to the tank-side second flow inlet 6b. In addition, in the second tank 6, the tank-side second flow outlet 6a is not directly connected to the tank-side second flow inlet 6b. In addition, in the second tank 6, the flow path opening of the first radiator 1 is not directly connected to the flow path opening of the second radiator 2.

[0052] Specifically, the second tank 6 has a plurality of tank chambers that are not directly connected to each other inside the second tank 6. For example, the second tank 6 has a third tank chamber 61 and a fourth tank chamber 62. The third tank chamber 61 and the fourth tank chamber 62 are partitioned by a second partition 6p.

[0053] The tank-side second outflow port 6a is connected to the third tank chamber 61. The tank-side second outflow port 6a may be provided in the third tank chamber 61. Alternatively, the tank-side second outflow port 6a may be communicated with the third tank chamber 61 via the third pipe 73.

[0054] The tank-side second inlet 6b is connected to the fourth tank chamber 62. The tank-side second inlet 6b may be provided in the fourth tank chamber 62. Alternatively, the tank-side second inlet 6b may be communicated with the fourth tank chamber 62 via the fourth pipe 74.

[0055] The coolant in the second tank 6 flows out from the tank-side second outflow port 6a to the second cooling device 4. For example, the coolant in the second tank 6 flows from the tank-side second outflow port 6a of the third tank chamber 61 to the first cooling device 3 via the third pipe 73. The coolant flowing through the first cooling device 3 flows from the tank-side second inflow port 6b to the fourth pipe 74 and flows into the fourth tank chamber 62. The coolant flowing into the fourth tank chamber 62 flows in the second radiator 2.

[0056] <Detailed Structure of First Embodiment>

[0057] Next, refer to Figure 3 The detailed structures of the heat sink B and the cooling unit A in the exemplary first embodiment of the present invention will be described. Figure 31 is an overall perspective view of a cooling unit A having a heat sink B according to an exemplary first embodiment of the present invention.

[0058] <Cooling unit A>

[0059] The cooling unit A includes a heat sink B, a first cooling device 3, a second cooling device 4, a first pipe 71, a second pipe 72, a third pipe 73, and a fourth pipe 74. The first tank 5 is connected to the first cooling device 3 via the first pipe 71 and the second pipe 72. The second tank 6 is connected to the second cooling device 4 via the third pipe 73 and the fourth pipe 74.

[0060] <Heat dissipation device B>

[0061] The heat sink B includes a first radiator 1, a second radiator 2, a first tank 5, and a second tank 6. The first tank 5 is mounted on one side (-X direction) of the first direction X of the first radiator 1 and the second radiator 2. The second tank 6 is mounted on the other side (+X direction) of the first direction X of the first radiator 1 and the second radiator 2. The first tank 5 is connected to the first cooling device 3 through a first pipe 71 and a second pipe 72. The second tank 6 is connected to the second cooling device 4 through a third pipe 73 and a fourth pipe 74.

[0062] Here, the first heat sink 1 and the second heat sink 2 are arranged side by side along the third direction Z. The first heat sink 1 is located on one side of the third direction Z (-Z direction), and the second heat sink 2 is located on the other side of the third direction Z (+Z direction).

[0063] In addition, the first cooling device 3 and the second cooling device 4 are arranged in an X direction. The first cooling device 3 is located on one side of the first direction X (-X direction), and the second cooling device 4 is located on the other side of the first direction X (+X direction). In addition, the first cooling device 3 and the second cooling device 4 are located on one side of the third direction Z (-Z direction) relative to the heat sink B.

[0064] <First Cooling Device 3 and Second Cooling Device 4>

[0065] The first cooling device 3 includes a cold plate 31, a pump 32, and a housing 33. The pump 32 is located on the second direction side (-Y direction) of the housing 33. Here, the pump 32 is located on the third direction other side (+Z direction) on the surface of the second direction side (-Y direction) of the housing 33. The cold plate 31 is located on the second direction other side (+Y direction) of the housing 33.

[0066] The second cooling device 4 includes a cold plate 41, a pump 42, and a housing 43. The pump 42 is located on the second direction side (-Y direction) of the housing 43. Here, the pump 42 is located on the third direction other side (+Z direction) on the surface of the housing 43 on the second direction side (-Y direction). The cold plate 41 is located on the second direction other side (+Y direction) of the housing 43.

[0067] The surfaces of the cold plate 31 and the cold plate 41 on the other side of the second direction Y (+Y direction) are respectively connected to the first heat generating component R1 and the second heat generating component R2 ( Figure 2 ) contact. The coolant passes through the surface of the cold plate 31 and the cold plate 41 on the second direction Y side (-Y direction). The cold plate 31 and the cold plate 41 are plates made of copper or aluminum. The cold plate 31 and the cold plate 41 absorb the heat from the heat generating components (in Figure 3 (not shown) and transfers heat to the coolant.

[0068] The coolant is circulated by pump 32 and pump 42. Pump 32 and pump 42 are centrifugal pumps that draw cooling water from the other side of the second direction Y (+Y direction) and discharge the cooling water in a direction perpendicular to the second direction Y. In the first embodiment, pump 32 and pump 42 are arranged on the second direction Y side (-Y direction side) of the housing 33 and the housing 43. However, pump 32 and pump 42 may also be arranged in any one of the first to fourth pipes 71 to 74 at a position different from the first cooling device 3 and the second cooling device 4. In addition, here, pump 32 and pump 42 are respectively arranged in the first cooling device 3 and the second cooling device 4. Thus, the redundancy of the cooling unit A can be maintained, so that the coolant can be circulated continuously. In addition, the number of pumps may be 1 or more than 3.

[0069] like Figure 2 and Figure 3 As shown, in the first cooling device 3, the housing 33 has a first inlet 331 and a first outlet 332. The first inlet 331 is connected to the second pipe 72. The first outlet 332 is connected to the first pipe 71. The housing 33 has a flow path inside. In the first cooling device 3, the coolant flowing in from the first inlet 331 flows through the flow path in the housing 33, flows through the cold plate 31 and the pump 32, and flows out from the first outlet 332.

[0070] In the second cooling device 4, the housing 43 has a second inlet 431 and a second outlet 432. The second inlet 431 is connected to the third pipe 73. The second outlet 432 is connected to the fourth pipe 74. In the second cooling device 4, the coolant flowing in from the second inlet 431 flows through the flow path in the housing 43, flows through the cold plate 41 and the pump 42, and flows out from the second outlet 432.

[0071] <First heat sink 1 and second heat sink 2>

[0072] Reference Figure 4A to Figure 6 The structure of the heat sink B will be described. Figure 4A It is a schematic partially enlarged perspective view showing an enlarged view of the first tank 5 and its vicinity of the heat sink B according to the exemplary first embodiment of the present invention. Figure 4B This is a cross-sectional perspective view when the first tank 5 of the heat sink according to the exemplary first embodiment of the present invention is cut along the second direction Y. Figure 5A It is a schematic partially enlarged perspective view showing an enlarged view of the vicinity of the second tank 6 of the heat sink B according to the exemplary first embodiment of the present invention. Figure 5B This is a cross-sectional perspective view when the second tank 6 of the heat sink B according to the exemplary first embodiment of the present invention is cut along the second direction Y. Figure 6 This is a cross-sectional perspective view when the heat sink B according to the exemplary first embodiment of the present invention is cut along the second direction Y.

[0073] like Figure 4A to Figure 6 As shown, the first radiator 1 has a first cooling tube 11 and a first fin 12. Here, the first radiator 1 has a plurality of first cooling tubes 11 and a plurality of first fins 12. The first cooling tube 11 is a tubular member made of a metal material having excellent thermal conductivity such as copper or aluminum, and the first cooling tube 11 extends along the first direction X.

[0074] The first fin 12 extends from the first cooling tube 11 in the second direction Y. Here, the first fin 12 is a plate-shaped member made of a metal material with excellent thermal conductivity such as copper or aluminum. The first fin 12 is formed by extending in the second direction Y and extending in a corrugated shape in the first direction X. By forming the first fin 12 in a corrugated shape, the area in contact with the air can be increased, thereby improving heat dissipation.

[0075] The plurality of first cooling tubes 11 and the plurality of first fins 12 are alternately stacked along the second direction Y. The first fins 12 are in contact with the outer peripheral surface of each of the plurality of first cooling tubes 11. More specifically, the first cooling tubes 11 and the first fins 12 are connected by brazing. The coolant that has absorbed heat passes through the inside of the first cooling tubes 11, whereby the heat of the coolant is transferred from the first cooling tubes 11 to the first fins 12 and is released to the outside through the first fins 12.

[0076] The second radiator 2 has a second cooling tube 21 and a second fin 22. Here, the second radiator 2 has a plurality of second cooling tubes 21 and a plurality of second fins 22. The second radiator 2 has the same structure as the first radiator 1 except for size and position, and thus redundant description is omitted.

[0077] like Figure 6As shown, the first heat sink 1 and the second heat sink 2 extend along the first direction X, respectively. The first heat sink 1 and the second heat sink 2 are arranged in a row along the third direction Z. Here, the size of the first heat sink 1 is larger than that of the second heat sink 2. In more detail, although the length of the first heat sink 1 along the second direction Y is substantially equal to the length of the second heat sink 2 along the second direction Y, the length of the first heat sink 1 along the third direction Z is larger than the length of the second heat sink 2 along the third direction Z. Therefore, when observing the cross section of the first heat sink 1 and the second heat sink 2 cut along the second direction Y, the cross-sectional area of ​​the first heat sink 1 is larger than the cross-sectional area of ​​the second heat sink 2.

[0078] <First tank 5 and second tank 6>

[0079] Next, refer to Figure 4A to Figure 5B The structures of the first tank 5 and the second tank 6 will be described.

[0080] like Figure 4A and Figure 4B As shown, the first tank 5 is arranged on the first direction X side (-X direction) of the first radiator 1 and the second radiator 2. The first tank 5 is divided into a first tank chamber 51 and a second tank chamber 52 by a first partition 5p. Here, the first partition 5p extends along the second direction Y, separating the first tank 5 along the third direction Z. The first tank chamber 51 is located on one side of the third direction (-Z direction), and the second tank chamber 52 is located on the other side of the third direction (+Z direction). The first tank chamber 51 is connected to one side of the plurality of first cooling pipes 11, and is connected to Figure 2 and Figure 3 The first tank chamber 52 is connected to the first outlet 332 of the first cooling device 3 shown. The second tank chamber 52 is connected to one side of the plurality of second cooling pipes 21, and is connected to the first inlet 331 of the first cooling device 3. The first piping (connecting pipe) 71 is connected to the first tank chamber 51. The second piping (connecting pipe) 72 is connected to the second tank chamber 52. A portion of the second piping 72 passes through the first tank chamber 51. By configuring so that a portion of the second piping 72 passes through the first tank chamber 51, the width of the cooling unit A in the first direction X can be reduced.

[0081] like Figure 5A and Figure 5B As shown, the second tank 6 is arranged on the other side of the first direction X (+X direction) of the first radiator 1 and the second radiator 2. The second tank 6 is divided into a third tank chamber 61 and a fourth tank chamber 62 by a second partition 6p. Here, the second partition 6p extends along the second direction Y, separating the second tank 6 along the third direction Z. The third tank chamber 61 is located on one side of the third direction (-Z direction), and the fourth tank chamber 62 is located on the other side of the third direction (+Z direction). The third tank chamber 61 is connected to the other side of the plurality of first cooling pipes 11, and is connected to Figure 2 and Figure 3The fourth tank chamber 62 is connected to the other side of the plurality of second cooling pipes 21 and is connected to the second flow outlet 432 of the second cooling device 4. The third piping (connecting pipe) 73 is connected to the third tank chamber 61. The fourth piping (connecting pipe) 74 is connected to the fourth tank chamber 62. A portion of the fourth piping 74 passes through the third tank chamber 61. By configuring the fourth piping 74 so that a portion of the fourth piping 74 passes through the third tank chamber 61, the width of the cooling unit A in the first direction X can be reduced.

[0082] By providing the first tank 5 and the second tank 6, the capacity of the coolant in the cooling unit A can be increased. Regarding the coolant in the cooling unit A, the coolant gradually evaporates from the connection part of the pipe and the like and decreases. Due to the decrease in the coolant, the cooling capacity of the heat generating component may be reduced. In contrast, by providing the first tank 5 and the second tank 6, the amount of coolant can be ensured, thereby reducing the reduction in cooling capacity.

[0083] In the present embodiment, the heat sink B allows the coolant to flow in and out relative to the first cooling device 3 and the second cooling device 4. The heat sink B includes a first radiator 1, a second radiator 2, a first tank 5, and a second tank 6. The first tank 5 is connected to one side of the first direction (-X direction) of each of the first radiator 1 and the second radiator 2. The second tank 6 is connected to the other side of the first direction (+X direction) of each of the first radiator 1 and the second radiator 2. The coolant flows inside the first radiator 1, the second radiator 2, the first tank 5, and the second tank 6.

[0084] The first tank 5 has a tank-side first outlet 5a that allows the coolant to flow out to the first cooling device 3, and a tank-side first inlet 5b that allows the coolant from the first cooling device 3 to flow in. The second tank 6 has a tank-side second outlet 6a that allows the coolant to flow out to the second cooling device 4, and a tank-side second inlet 6b that allows the coolant from the second cooling device 4 to flow in. In the first radiator 1, the coolant flowing in from the tank-side first inlet 5b flows from one side of the first direction (-X direction) to the other side of the first direction (+X direction), and flows out from the tank-side second outlet 6a. In the second radiator 2, the coolant flowing in from the tank-side second inlet 6b flows from the other side of the first direction (+X direction) to one side of the first direction (-X direction), and flows out from the tank-side first outlet 5a.

[0085] According to the heat sink B of the present embodiment, the first cooling device 3 can be cooled by the coolant that has dissipated heat in the second radiator 2, and the second cooling device 4 can be cooled by the coolant that has dissipated heat in the first radiator 1. Therefore, through the circulation of the coolant, the first radiator 1 and the second radiator 2 can effectively dissipate heat, thereby effectively cooling the first cooling device 3 and the second cooling device 4. In addition, the coolant flows out of and flows in from the first tank 5 to the first cooling device 3, and flows out of and flows in from the second tank 6 to the second cooling device 4, thereby suppressing the shortage of circulating coolant due to the evaporation of the coolant. Furthermore, it is possible to suppress the complexity of the structure of the first piping 71 to the fourth piping 74 connecting the heat sink B to the first cooling device 3 and the second cooling device 4.

[0086] The first radiator 1 has a first cooling tube 11 and first fins 12. The first cooling tube 11 extends in a first direction X. Coolant passes through the first cooling tube 11. The first fins 12 are in contact with the outer peripheral surface of the first cooling tube 11. The first fins 12 extend in a second direction Y perpendicular to the first direction X.

[0087] The second radiator 2 has a second cooling tube 21 and second fins 22. The second cooling tube 21 extends in the first direction X. The coolant passes through the second cooling tube 21. The second fins 22 are in contact with the outer peripheral surface of the second cooling tube 21. The second fins 22 extend in the second direction Y.

[0088] The first radiator 1 and the second radiator 2 are arranged along a third direction Z perpendicular to the first direction X and the second direction Y. The first tank 5 is divided into a first tank chamber 51 and a second tank chamber 52 by a first partition 5p. The first tank chamber 51 is connected to the tank-side first inlet 5b. The second tank chamber 52 is connected to the tank-side first outlet 5a.

[0089] The second tank 6 is divided into a third tank chamber 61 and a fourth tank chamber 62 by the second partition 6p. The third tank chamber 61 is connected to the tank-side second outflow port 6a. The fourth tank chamber 62 is connected to the tank-side second inflow port 6b.

[0090] By configuring the first radiator 1 and the second radiator 2 along a direction (Z direction) perpendicular to the direction (Y direction) in which the first fins 12 and the second fins 22 extend from the first cooling tube 11 and the second cooling tube 21 respectively, the cooling performance can be adjusted according to the cross-sectional areas of the first radiator 1 and the second radiator 2.

[0091] The cooling unit A further includes a first pipe 71, a second pipe 72, a third pipe 73, and a fourth pipe 74. The first pipe 71 connects the first tank chamber 51 and the first cooling device 3. The second pipe 72 connects the second tank chamber 52 and the first cooling device 3. The third pipe 73 connects the third tank chamber 61 and the second cooling device 4. The fourth pipe 74 connects the fourth tank chamber 62 and the second cooling device 4. Thus, the coolant can be effectively circulated in the heat sink B, the first cooling device 3, and the second cooling device 4.

[0092] The second pipe 72 passes through the first tank chamber 51 and penetrates the first partition 5p to be connected to the second tank chamber 52. Thus, even when the second pipe 72 is connected to the second tank chamber 52 located on the side away from the first cooling device 3, the second pipe 72 is connected through the first tank chamber 51, so that the overall size of the heat dissipation device B can be reduced. In addition, the fourth pipe 74 passes through the third tank chamber 61 and penetrates the second partition 6p to be connected to the fourth tank chamber 62. Thus, even when the fourth pipe 74 is connected to the fourth tank chamber 62 located on the side away from the second cooling device 4, the fourth pipe 74 is connected through the third tank chamber 61, so that the overall size of the heat dissipation device B can be reduced.

[0093] Next, refer to Figure 7 A heat sink B according to an exemplary first embodiment of the present invention will be described. Figure 7 It is a schematic cross-sectional view of a heat sink B according to the exemplary first embodiment of the present invention.

[0094] like Figure 7 As shown, when blowing air W to the heat sink B, it is preferred to blow air W from the other side of the third direction Z (+Z direction) of the heat sink B. In this case, the other side of the third direction Z (+Z direction) of the heat sink B is located upwind of the air W. In the heat sink B, the first heat sink 1 and the second heat sink 2 are arranged along the third direction Z. The first heat sink 1 is located on one side of the third direction Z (-Z direction), and the second heat sink 2 is located on the other side of the third direction Z (+Z direction).

[0095] In this case, the cross-sectional area of ​​the first radiator 1 is larger than the cross-sectional area of ​​the second radiator 2. Thus, even if the temperature of the wind that contacts the first radiator 1 that releases the heat absorbed in the first cooling device 3 is higher than the temperature of the wind that contacts the second radiator 2 that releases the heat absorbed in the second cooling device 4, the heat dissipation performance of the first radiator 1 and the second radiator 2 can be adjusted to the same level.

[0096] The heat dissipation performance of the first radiator 1 and the second radiator 2 is affected by the temperature, strength, etc. of the air or wind flowing around the first radiator 1 and the second radiator 2, so the heat dissipation performance of the first radiator 1 and the second radiator 2 may be different depending on the position. In the first embodiment, the wind W flows from the second radiator 2 in the third direction Z. Therefore, the air with the heat released from the second radiator 2 flows to the first radiator 1. Since the air flowing to the first radiator 1 carries the heat released from the second radiator, if the first radiator 1 and the second radiator 2 have the same size, even if the air passes through the first radiator 1, sometimes the heat is not released to the same extent as the second radiator 2. Therefore, by making the size of the first radiator 1 larger than the second radiator 2, the surface of the contact between the external air and the first radiator 1 becomes larger, so the heat dissipation performance of the first radiator 1 is improved. As a result, the coolant flowing into the second cooling device 4 is the coolant of the same temperature as the coolant flowing into the first cooling device 3, so that the cooling performance of the first cooling device 3 and the second cooling device 4 can be made uniform.

[0097] In this way, when the cross section of the first heat sink 1 and the second heat sink 2 cut along the second direction Y is observed from the first direction X, the cross-sectional area of ​​the first heat sink 1 is larger than the cross-sectional area of ​​the second heat sink 2. By making the cross-sectional area of ​​the first heat sink 1 larger than the cross-sectional area of ​​the second heat sink 2, the cooling performance of the first heat sink 1 and the second heat sink 2 can be made uniform.

[0098] Next, refer to Figure 1 to Figure 8B A cooling unit A according to a first exemplary embodiment of the present invention will be described. Fig. 8A 1 is a schematic side view of a cooling unit A according to the exemplary first embodiment of the present invention. Figure 8B 1 is a schematic perspective view of a cooling unit A according to an exemplary first embodiment of the present invention. In addition, although the second cooling device 4 also has the same structure as the first cooling device 3, here, reference is made to Fig. 8A and Figure 8B The first cooling device 3 will be mainly described.

[0099] As described above, in the cooling unit A, one side of the first radiator 1 and the first cooling device 3 are connected by the first pipe 71 via the first tank 5 . One side of the second radiator 2 and the first cooling device 3 are connected by the second pipe 72 via the first tank 5 .

[0100] <First to fourth pipes 71 to 74>

[0101] As described above, the pumps 32 and 42 mounted on the first cooling device 3 and the second cooling device 4 are centrifugal pumps. The centrifugal pump is a pump that draws cooling water from the other side of the second direction Y (+Y direction) to the one side of the second direction Y (-Y direction) and discharges the cooling water in the centrifugal direction (the first direction X or the third direction Z).

[0102] In the first cooling device 3, the first inlet 331 and the first outlet 332 are located on the other side of the third direction Z (+Z direction) relative to the housing 33. In addition, in the first cooling device 3, the first inlet 331 is located closer to the second direction Y side (-Y direction) than the first outlet 332. Therefore, the position of the second pipe 72 connected to the first inlet 331 is located closer to the other side of the second direction Y than the position of the first pipe 71 connected to the first outlet 332.

[0103] Fig. 8A and Figure 8B The structure of the first cooling device 3 in the cooling unit A is shown, but the second cooling device 4 also has the same structure as the first cooling device 3. Therefore, in the second cooling device 4, the second inlet 431 is located at the other side of the second direction Y than the second outlet 432. The position of the third pipe 73 connected to the second inlet 431 is located at the other side of the second direction Y than the position of the fourth pipe 74 connected to the second outlet 432.

[0104] The first cooling device 3 includes a cold plate 31, a pump 32, and a housing 33. The pump 32 is located on the second direction side (-Y direction) relative to the housing 33. The pump 32 is a centrifugal pump. In the first cooling device 3, the first pipe 71 is located on the second direction side (-Y direction) relative to the second pipe 72.

[0105] According to the structure of a centrifugal pump that draws coolant from the other side of the second direction (+Y direction) and makes the coolant flow in a circumferential direction, the first pipe 71 for the coolant to flow out of the first cooling device 3 is located closer to the second direction side (-Y direction) than the second pipe 72 for the coolant to flow into the first cooling device 3, thereby simplifying the flow path of the coolant in the first cooling device 3.

[0106] In the cooling unit A, the second radiator 2, the first radiator 1, and the first cooling device 3 are arranged in this order in the third direction Z perpendicular to the first direction X and the second direction Y. In addition, in the third direction Z perpendicular to the first direction X and the second direction Y, the second radiator 2, the first radiator 1, and the second cooling device 4 are arranged in this order.

[0107] The cooling unit A includes a heat sink B, a first cooling device 3, and a second cooling device 4. In the cooling unit A, the second heat sink 2, the first heat sink 1, and the first cooling device 3 or the second cooling device 4 are arranged in this order in a third direction Z perpendicular to the first direction X and the second direction Y. Thus, the wind can be effectively flowed relative to the first fin 12 and the second fin 22 while avoiding the flow of wind being blocked by the first cooling device 3 or the second cooling device 4.

[0108] In addition, Figure 2 to Figure 8B In the heat sink B shown, the first heat sink 1 and the second heat sink 2 are arranged side by side along the third direction Z, but the present embodiment is not limited thereto. The first heat sink 1 and the second heat sink 2 may also be arranged side by side along the second direction Y.

[0109] In addition, Figure 2 to Figure 8B In the heat sink B and / or cooling unit A shown in the figure, the first partition 5p separates the first tank 5 along the third direction Z, and the first tank chamber 51 and the second tank chamber 52 are arranged in the Y direction, but the present embodiment is not limited to this. In addition, the second partition 6p separates the second tank 6 along the third direction Z, and the third tank chamber 61 and the fourth tank chamber 62 are arranged in the Y direction, but the present embodiment is not limited to this.

[0110] In addition, Fig. 8A and Figure 8B In the first cooling device 3 of the cooling unit A shown, the first outlet 332 is arranged at a position closer to the other side of the second direction (+Y direction) than the first inlet 331, and in the second cooling device 4, the second outlet 432 is arranged at a position closer to the other side of the second direction (+Y direction) than the second inlet 431, but the present embodiment is not limited thereto. Alternatively, in the first cooling device 3, the first outlet 332 is arranged at the same height as the first inlet 331 in the second direction Y, and in the second cooling device 4, the second outlet 432 is arranged at the same height as the second inlet 431 in the second direction Y.

[0111] <Second embodiment>

[0112] Next, the heat sink B and the cooling unit A according to the second exemplary embodiment of the present invention will be described. Fig. 9 A cooling unit A including a heat sink B according to a second exemplary embodiment of the present invention will be described. Fig. 9 1 is an overall perspective view of a cooling unit A of a heat sink B according to an exemplary second embodiment of the present invention.

[0113] like Fig. 9As shown, the cooling unit A has a heat sink B, a first cooling device 3, and a second cooling device 4. The heat sink B has a first radiator 1A, a second radiator 2A, a first tank 5A, and a second tank 6A. The first radiator 1A and the second radiator 2A are arranged along the second direction Y. Here, the first radiator 1A is stacked relative to the second radiator 2A along the second direction Y. The first tank 5A is located on one side of the first direction of the first radiator 1A and the second radiator 2A (-X direction), and the second tank 6A is located on the other side of the first direction of the first radiator 1A and the second radiator 2A (+X direction).

[0114] The first heat sink 1A includes a portion 1Aa and a portion 1Ab separated from the portion 1Aa. In the first heat sink 1A, the portion 1Aa and the portion 1Ab are arranged side by side along the third direction Z. The portion 1Aa is located on one side (-Z direction) of the third direction, and the portion 1Ab is located on the other side (+Z direction) of the third direction.

[0115] The second heat sink 2A ​​has a portion 2Aa and a portion 2Ab separated from the portion 2Aa. In the second heat sink 2A, the portion 2Aa and the portion 2Ab are arranged in a third direction Z. The portion 2Aa is located on one side of the third direction (-Z direction), and the portion 2Ab is located on the other side of the third direction (+Z direction).

[0116] The portion 1Aa of the first heat sink 1A and the portion 2Aa of the second heat sink 2A ​​are arranged side by side in the second direction Y. In addition, the portion 1Ab of the first heat sink 1A and the portion 2Ab of the second heat sink 2A ​​are arranged side by side in the second direction Y.

[0117] Here, the size of the portion 1Aa and the portion 2Aa is larger than that of the portion 1Ab and the portion 2Ab. More specifically, although the length of the portion 1Aa and the portion 2Aa along the second direction Y is substantially equal to the length of the portion 1Ab and the portion 2Ab along the second direction Y, the length of the portion 1Aa and the portion 2Aa along the third direction Z is larger than the length of the portion 1Ab and the portion 2Ab along the third direction Z. Therefore, when observing the cross section of the first heat sink 1A and the second heat sink 2A ​​cut along the second direction Y, the cross-sectional area of ​​the first heat sink 1A is larger than the cross-sectional area of ​​the second heat sink 2A.

[0118] The cooling unit A further includes a first pipe 71, a second pipe 72, a third pipe 73, and a fourth pipe 74. One side of the first radiator 1A is connected to the first cooling device 3 via the first pipe 71. Specifically, one side of the first radiator 1A is connected to the first cooling device 3 via the first tank 5A via the first pipe 71. In addition, one side of the second radiator 2A is connected to the first cooling device 3 via the second pipe 72. Specifically, one side of the second radiator 2A is connected to the first cooling device 3 via the first tank 5A via the second pipe 72.

[0119] The other side of the first radiator 1A is connected to the second cooling device 4 through the third pipe 73. Specifically, the other side of the first radiator 1A is connected to the second cooling device 4 through the second tank 6A through the third pipe 73. In addition, the other side of the second radiator 2A is connected to the second cooling device 4 through the fourth pipe 74. Specifically, the other side of the second radiator 2A is connected to the second cooling device 4 through the second tank 6A through the fourth pipe 74.

[0120] Next, refer to Fig. 9 and Fig.10 A heat sink B and a cooling unit A according to an exemplary second embodiment of the present invention will be described. Fig.10 1 is a schematic cross-sectional view of a heat sink B according to an exemplary second embodiment of the present invention. In this embodiment, a first heat sink 1A and a second heat sink 2A ​​are arranged side by side in a second direction Y.

[0121] The first tank 5A is arranged on the first direction X side (-X direction) of the first radiator 1A and the second radiator 2A. The first tank 5A has a first tank chamber 51A and a second tank chamber 51B. The first tank chamber 51A and the second tank chamber 51B are arranged in a row along the second direction Y, and the first tank chamber 51A is located on the second direction side (-Y direction) of the second tank chamber 51B. The first tank chamber 51A is located on the first direction X side (-X direction) of the portion 1Aa and the portion 1Ab of the first radiator 1A. The second tank chamber 51B is located on the first direction X side (-X direction) of the portion 2Aa and the portion 2Ab of the second radiator 2A.

[0122] Similarly, the second tank 6A is arranged on the other side of the first direction X (+X direction) of the first radiator 1A and the second radiator 2A. The second tank 6A has a third tank chamber 61A and a fourth tank chamber 61B. The third tank chamber 61A and the fourth tank chamber 61B are arranged in the second direction Y, and the third tank chamber 61A is located on the second direction side (-Y direction) of the fourth tank chamber 61B. The third tank chamber 61A is located on the other side of the first direction X (+X direction) of the portion 1Aa and the portion 1Ab of the first radiator 1A. The fourth tank chamber 61B is located on the other side of the first direction X (+X direction) of the portion 2Aa and the portion 2Ab of the second radiator 2A.

[0123] In this embodiment as well, the cooling performances of the first cooling device 3 and the second cooling device 4 can be made uniform.

[0124] Next, refer to Figures 9 to 11B A heat sink B according to an exemplary second embodiment of the present invention will be described. Fig.11A It is a partial perspective view of the vicinity of the first tank 5A of the heat sink B according to the exemplary second embodiment of the present invention. Fig. 11BThis is a cross-sectional perspective view when the heat sink B according to the exemplary second embodiment of the present invention is cut along the second direction Y.

[0125] like Fig.11A and Fig. 11B As shown, the first heat sink 1A includes a portion 1Aa and a portion 1Ab. The portion 1Aa and the portion 1Ab include a first cooling pipe 11 and a first fin 12, respectively.

[0126] The second radiator 2A has a portion 2Aa and a portion 2Ab. The portion 2Aa and the portion 2Ab respectively have a second cooling tube 21 and a second fin 22. In the heat sink B of the exemplary second embodiment of the present invention, the first cooling tube 11, the first fin 12, the second cooling tube 21 and the second fin 22 are the same as those of the heat sink B of the exemplary first embodiment described above, and thus repeated descriptions are omitted.

[0127] like Fig.11A As shown, the first tank 5A is arranged on one side of the first direction X (-X direction) of the first radiator 1A and the second radiator 2A. The first tank 5A is divided into a first tank chamber 51A and a second tank chamber 51B by a first partition 5p. Here, the first partition 5p extends along the third direction Z to separate the first tank 5A along the second direction Y. The first tank chamber 51A is located on one side of the second direction (-Y direction), and the second tank chamber 51B is located on the other side of the second direction (+Y direction). The first tank chamber 51A is connected to one side of the multiple first cooling pipes 11 in part 1Aa and part 1Ab of the first radiator 1A. The second tank chamber 51B is connected to one side of the multiple second cooling pipes 21 in part 2Aa and part 2Ab of the second radiator 2A. The first piping 71 is connected to the first tank chamber 51A. The second piping 72 is connected to the second tank chamber 51B.

[0128] like Fig. 11B As shown, here, the first pipe 71 and the second pipe 72 extend in the first direction X, similarly to the first radiator 1A and the second radiator 2A, respectively.

[0129] Next, refer to Fig. 12A and Fig. 12B A heat sink B according to an exemplary second embodiment of the present invention will be described. Fig. 12A It is a partial perspective view of the vicinity of the second tank 6A of the heat sink B according to the exemplary second embodiment of the present invention. Fig. 12B 2 is a perspective view of the vicinity of the second tank 6A of the heat sink B according to the second exemplary embodiment of the present invention. Fig. 12B In the embodiment, the first heat sink 1A covers the heat sink B from one side in the second direction (-Y direction).

[0130] like Fig. 12A and Fig. 12BAs shown, the second tank 6A is arranged on the other side of the first direction X (+X direction) of the first radiator 1A and the second radiator 2A. The second tank 6A is divided into a third tank chamber 61A and a fourth tank chamber 61B by a second partition 6p. Here, the second partition 6p extends along the third direction Z to separate the second tank 6A along the second direction Y. The third tank chamber 61A is located on one side of the second direction (-Y direction), and the fourth tank chamber 61B is located on the other side of the second direction (+Y direction). The third tank chamber 61A is connected to the other side of the multiple first cooling pipes 11 in part 1Aa and part 1Ab of the first radiator 1A. The fourth tank chamber 61B is connected to the other side of the multiple second cooling pipes 21 in part 2Aa and part 2Ab of the second radiator 2A. The third piping 73 is connected to the third tank chamber 61A. The fourth piping 74 is connected to the fourth tank chamber 61B.

[0131] like Fig. 12B As shown, here, the third pipe 73 and the fourth pipe 74 extend in the first direction X similarly to the first radiator 1A and the second radiator 2A, respectively.

[0132] The first radiator 1A has a first cooling tube 11 and first fins 12. The first cooling tube 11 extends in a first direction X. Coolant passes through the first cooling tube 11. The first fins 12 are in contact with the outer peripheral surface of the first cooling tube 11. The first fins 12 extend in a second direction Y perpendicular to the first direction X relative to the first cooling tube 11.

[0133] The second heat sink 2A ​​has a second cooling tube 21 and second fins 22. The second cooling tube 21 extends in the first direction X. The coolant passes through the second cooling tube 21. The second fins 22 are in contact with the outer peripheral surface of the second cooling tube 21. The second fins 22 extend in the second direction Y.

[0134] The first radiator 1A and the second radiator 2A are arranged along the second direction Y. The first tank 5A is divided into a first tank chamber 51A and a second tank chamber 51B by a first partition 5p. The first tank chamber 51A is connected to the first tank-side inlet 5b. The second tank chamber 51B is connected to the first tank-side outlet 5a.

[0135] The second tank 6A is divided into a third tank chamber 61A and a fourth tank chamber 61B by the second partition 6p. The third tank chamber 61A is connected to the tank-side second outflow port 6a. The fourth tank chamber 61B is connected to the tank-side second inflow port 6b.

[0136] The first fin 12 extends from the first cooling tube 11 in the Y direction. The second fin 22 extends from the second cooling tube 21 in the Y direction. By arranging the first radiator 1A and the second radiator 2A along the direction (Y direction) in which the first fin 12 and the second fin 22 extend from the first cooling tube 11 and the second cooling tube 21, respectively, the cooling performance of the first radiator 1A and the second radiator 2A can be easily made uniform.

[0137] Next, refer to Fig.13 and Fig.14 The first cooling device 3 and the second cooling device 4 of the cooling unit A according to the second exemplary embodiment of the present invention will be described. Fig.13 It is a schematic partially enlarged perspective view of a cooling unit A according to an exemplary second embodiment of the present invention. Fig.14 1 is a schematic perspective view of the first cooling device 3 of the cooling unit A according to the second exemplary embodiment of the present invention. The second cooling device 4 has the same structure as the first cooling device 3, and therefore redundant description is omitted.

[0138] like Fig.13 and Fig.14 As shown, the first cooling device 3 includes a cold plate 31, a pump 32, and a housing 33. The pump 32 is located on one side of the second direction (-Y direction) of the housing 33. Here, the pump 32 is located approximately at the center of the third direction on the surface of the housing 33 on one side of the second direction (-Y direction). The cold plate 31 is located on the other side of the housing 33 in the second direction (+Y direction).

[0139] In the first cooling device 3, the housing 33 has a first inlet 331 and a first outlet 332. The first inlet 331 is connected to the second pipe 72. The first outlet 332 is connected to the first pipe 71. The housing 33 has a flow path inside. In the first cooling device 3, the coolant flowing in from the first inlet 331 flows through the flow path in the housing 33 and flows through the cold plate 31 and the pump 32, and flows out from the first outlet 332. In the first cooling device 3, the second pipe 72 connected to the first inlet 331 and the first pipe 71 connected to the first outlet 332 are located at the same height in the second direction (Y direction).

[0140] Next, refer to Figures 15A to 15C The first cooling device 3 and the second cooling device 4 of the cooling unit A according to the second exemplary embodiment of the present invention will be described. Fig.15A It is a schematic plan view of the first cooling device 3 of the cooling unit A according to the exemplary second embodiment of the present invention. Fig. 15B It is along Fig.15A Schematic cross-sectional view of line BB. Fig. 15C It is along Fig.15A Here, the second cooling device 4 also has the same structure as the first cooling device 3, so redundant description is omitted.

[0141] like Figures 15A to 15C As shown, a cooling device tank chamber 34 is provided inside the housing 33. The cooling device tank chamber 34 is located on a flow path connecting the first inlet 331 and the cold plate 31.

[0142] The coolant flowing through the second piping 72 flows toward the cooling device tank chamber 34 when it flows in from the first inlet 331 of the first cooling device 3. The cross-sectional area of ​​the cooling device tank chamber 34 is larger than the cross-sectional area of ​​the flow path of the first inlet 331. The coolant that has passed through the cooling device tank chamber 34 flows toward the other side of the second direction (+Y direction) and contacts the cold plate 31. The coolant flows along the cold plate 31 toward one side of the third direction (-Z direction) and reaches the other side of the second direction Y (+Y direction) of the pump 32. The coolant is sucked toward the second direction Y side (-Y direction) by the pump 32, thereby flowing in a direction perpendicular to the second direction Y, and flows out from the first outlet 332 of the first cooling device 3 through the first piping 71.

[0143] Thus, the first cooling device 3 includes a pump 32, a housing 33, and a cooling device tank chamber 34. The cooling device tank chamber 34 is arranged inside the housing 33. The pump 32 is located on one side of the second direction (-Y direction) relative to the housing 33. The pump 32 is a centrifugal pump. In the first cooling device 3, the first pipe 71 and the second pipe 72 are located at the same height in the second direction (Y direction).

[0144] The first pipe 71 for letting the coolant flow out of the first cooling device 3 and the second pipe 72 for letting the coolant flow into the first cooling device 3 are located at the same height in the second direction (Y direction), thereby making the first cooling device 3 thinner.

[0145] <Fixed structure>

[0146] Next, refer to Fig.16 The fixing structure of the heat sink B, the first cooling device 3 and the second cooling device 4 will be described. Fig.16 This is an overall perspective view of a cooling unit A according to an exemplary second embodiment of the present invention in a state where various fixing components are mounted.

[0147] The first radiator 1A and the second radiator 2A are fixed to each other by a radiator fixing member 81. When the first radiator 1A and the second radiator 2A are separate bodies, the first radiator 1A and the second radiator 2A are fixed to the radiator fixing member 81, so that the first radiator 1A and the second radiator 2A can be easily transported.

[0148] The heat sink fixing member 81 extends in the first direction X. Here, the heat sink fixing member 81 covers the heat sink B from both sides of one side in the second direction (-Y direction) and the other side in the second direction (+Y direction). For example, the heat sink fixing member 81 is welded to the first fin 12 of the first heat sink 1A and the second fin 22 of the second heat sink 2A.

[0149] The first cooling device 3 and the second cooling device 4 are fixed to the heat sink by a cooling device fixing member 82 connected to the heat sink fixing member 81. For example, the cooling device fixing member 82 is a plate member of a metal having excellent thermal conductivity, such as copper or aluminum.

[0150] The cooling device fixing member 82 fixes the first cooling device 3 to the radiator fixing member 81. The cooling device fixing member 82 extends from the radiator fixing member 81 to one side of the third direction (-Z direction), and supports the first cooling device 3 from one side of the second direction (-Y direction). Similarly, the cooling device fixing member 82 fixes the second cooling device 4 to the radiator fixing member 81. The cooling device fixing member 82 extends from the radiator fixing member 81 to one side of the third direction (-Z direction), and supports the second cooling device 4 from one side of the second direction (-Y direction).

[0151] The cooling device fixing member 82 facilitates the transportation of the first heat sink 1A, the second heat sink 2A, the first cooling device 3, and the second cooling device 4, which are separate components. In addition, the relative positions of the components can be determined. For example, the cooling device fixing member 82 is a plate member made of a metal having excellent thermal conductivity, such as copper or aluminum.

[0152] The cooling device fixing member 82 is arranged at a position in contact with the surface of the radiator fixing member 81 on the other side of the second direction (+Y direction), and fixed to each other. Therefore, when the length of the cooling unit A in the second direction Y is determined, the position of the radiator fixing member 81 is determined based on the length of the first radiator 1A and the second radiator 2A in the second direction Y, so that the length of the first radiator 1A and the second radiator 2A in the second direction Y can be increased to the maximum.

[0153] Thus, the cooling unit A further includes a radiator fixing member 81 for fixing the first radiator 1A and the second radiator 2A. The radiator fixing member 81 can fix the first radiator 1A and the second radiator 2A as separate components, thereby facilitating the transportation of the first radiator 1A and the second radiator 2A.

[0154] In addition, the cooling unit A also includes a cooling device fixing member 82 for fixing the first cooling device 3 and the second cooling device 4 to the radiator fixing member 81. The cooling device fixing member 82 can integrally fix the first radiator 1A, the second radiator 2A, the first cooling device 3, and the second cooling device 4, which are separate components, so that the cooling unit A can be easily transported.

[0155] In addition, refer to Fig.16The cooling unit A of the exemplary second embodiment has been described as having the radiator fixing member 81 and the cooling device fixing member 82, but the cooling unit A of the exemplary first embodiment may also have the radiator fixing member 81 and the cooling device fixing member 82. In this case, the radiator fixing member 81 may support the first radiator 1 and the second radiator 2 of the heat dissipation device B from at least one of the second direction one side (-Y direction) and the second direction other side (+Y direction).

[0156] In addition, Fig. 9 , Fig.11A , Fig. 11B as well as Fig.13 In the heat sink B shown, the first heat sink 1A and the second heat sink 2A ​​are stacked along the second direction Y, and the first heat sink 1A is separated into a portion 1Aa and a portion 1Ab located on the other side of the third direction Z (+Z direction) relative to the portion 1Aa, and the second heat sink 2A ​​is separated into a portion 2Aa and a portion 2Ab located on the other side of the third direction Z (+Z direction) relative to the portion 2Aa, but the present embodiment is not limited thereto. The first heat sink 1A may not be separated into the portion 1Aa and the portion 1Ab, and the second heat sink 2A ​​may not be separated into the portion 2Aa and the portion 2Ab.

[0157] Next, refer to Fig.17 A heat sink B according to an exemplary second embodiment of the present invention will be described. Fig.17 This is a cross-sectional perspective view when the heat sink B according to the exemplary second embodiment of the present invention is cut along the second direction Y.

[0158] like Fig.17 As shown, the first radiator 1A extends along the first direction X. The first radiator 1A has a plurality of first cooling tubes 11 and a plurality of first fins 12. The second radiator 2A has a plurality of second cooling tubes 21 and a plurality of second fins 22. Here, the first radiator 1A and the second radiator 2A are also arranged along the second direction Y. For example, the first radiator 1A and the second radiator 2A are stacked along the second direction Y. In this way, the first radiator 1A and the second radiator 2A can also be stacked along the second direction Y in a manner not to be separated along the third direction Z.

[0159] Above, the embodiments of the present invention have been described with reference to the accompanying drawings. However, the above embodiments are merely illustrations of the present invention, and the present invention is not limited to the above embodiments, and can be implemented in various ways without departing from the scope of its main purpose. For easy understanding, the accompanying drawings are schematically shown with their respective constituent elements as the main body, and the thickness, length, number, etc. of each constituent element shown in the drawings are different from the actual ones according to the convenience of making the accompanying drawings. In addition, the material, shape, size, etc. of each constituent element shown in the above embodiments are examples, and are not particularly limited, and various changes can be made within the scope of the effect of the present invention. The composition of the embodiment can also be appropriately changed within the scope of not exceeding the technical idea of ​​the present invention. In addition, the embodiment can also be implemented by combining within the possible scope.

[0160] For example, in Figure 2 In the cooling unit A shown, the first heat generating component R1 and the second heat generating component R2 are separated, but the present embodiment is not limited thereto. The first heat generating component R1 and the second heat generating component R2 may be different components in a single device integrally constructed.

Claims

1. A heat dissipation device, which allows a coolant to flow into and out of a first cooling device and a second cooling device, the heat dissipation device having: first radiator; Second radiator; A first tank connected to one side of each of the first radiator and the second radiator in the first direction; and a second tank connected to the first radiator and the second radiator on the other side of the first direction, The coolant flows inside the first radiator, the second radiator, the first tank, and the second tank. It is characterized in that The first tank has a tank-side first outflow port and a tank-side first inflow port. The tank-side first outflow port allows the coolant to flow out to the first cooling device, and the tank-side first inflow port allows the coolant from the first cooling device to flow in. The second tank has a tank-side second outflow port and a tank-side second inflow port, wherein the tank-side second outflow port allows the coolant to flow out to the second cooling device, and the tank-side second inflow port allows the coolant from the second cooling device to flow in. In the first radiator, the coolant flowing in from the first tank-side inlet flows from one side of the first direction to the other side of the first direction, and flows out from the second tank-side outlet. In the second radiator, the coolant flowing in from the tank-side second inlet flows from the other side of the first direction to one side of the first direction, and flows out from the tank-side first outlet.

2. The heat dissipation device according to claim 1, characterized in that: The first heat sink has: A first cooling pipe extending in a first direction for the cooling liquid to pass through; and a first fin, which contacts the outer peripheral surface of the first cooling tube and extends in a second direction perpendicular to the first direction, The second heat sink has: A second cooling pipe extending along the first direction for the cooling liquid to pass through; as well as a second fin, which contacts the outer peripheral surface of the second cooling tube and extends along a second direction, The first heat sink and the second heat sink are arranged along a second direction, The first tank is divided by a first partition into a first tank chamber connected to the tank-side first inlet and a second tank chamber connected to the tank-side first outlet. The second tank is divided by a second partition into a third tank chamber connected to the tank-side second outflow port and a fourth tank chamber connected to the tank-side second inflow port.

3. The heat dissipation device according to claim 1, characterized in that: The first heat sink has: A first cooling pipe extending in a first direction for the cooling liquid to pass through; and a first fin, which contacts the outer peripheral surface of the first cooling tube and extends in a second direction perpendicular to the first direction, The second heat sink has: A second cooling pipe extending along the first direction for the cooling liquid to pass through; as well as a second fin, which contacts the outer peripheral surface of the second cooling tube and extends along a second direction, The first heat sink and the second heat sink are arranged along a third direction perpendicular to the first direction and the second direction. The first tank is divided by a first partition into a first tank chamber connected to the tank-side first inlet and a second tank chamber connected to the tank-side first outlet. The second tank is divided by a second partition into a third tank chamber connected to the tank-side second outflow port and a fourth tank chamber connected to the tank-side second inflow port.

4. The heat dissipation device according to claim 3, characterized in that: When a cross section obtained by cutting the first heat sink and the second heat sink along the second direction is viewed from the first direction, the cross-sectional area of ​​the first heat sink is larger than the cross-sectional area of ​​the second heat sink.

5. A cooling unit comprising: The heat dissipation device according to any one of claims 2 to 4; the first cooling device; and The second cooling device, It is characterized in that In a third direction perpendicular to the first direction and the second direction, the second heat sink, the first heat sink, and the first cooling device or the second cooling device are arranged in this order.

6. The cooling unit according to claim 5, characterized in that The cooling unit also features: a first pipe connecting the first tank chamber and the first cooling device; a second pipe connecting the second tank chamber and the first cooling device; a third pipe connecting the third tank chamber and the second cooling device; as well as A fourth pipe connects the fourth tank chamber and the second cooling device.

7. The cooling unit according to claim 6, characterized in that The second pipe passes through the first tank chamber and penetrates the first partition to be connected to the second tank chamber. The fourth pipe passes through the third tank chamber, penetrates the second partition portion, and is connected to the fourth tank chamber.

8. The cooling unit according to claim 6, characterized in that The first cooling device comprises: Housing; and a centrifugal pump located on one side of the housing in the second direction, In the first cooling device, the first pipe is located on one side in the second direction relative to the second pipe.

9. The cooling unit according to claim 6, characterized in that: The first cooling device comprises: shell; a cooling device tank chamber disposed inside the housing; and a centrifugal pump located on one side of the housing in the second direction, In the first cooling device, the first pipe and the second pipe are located at the same height in the second direction.

10. The cooling unit according to claim 5, characterized in that The cooling unit further includes a radiator fixing member that fixes the first radiator and the second radiator.

11. The cooling unit according to claim 10, characterized in that The cooling unit further includes a cooling device fixing member that fixes the first cooling device and the second cooling device to the radiator fixing member.

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