COOLING PLATE AND DATA PROCESSING SYSTEM PROVIDED WITH COOLING PLATES

• US 20160366793A1
• Filed: 05/17/2016
• Published: 12/15/2016
• Est. Priority Date: 06/12/2015
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Onuki, Hiroshi, Kikuchi, Shunichi, IWAKIRI, Yoshihisa, Nakamura, Naoaki
• Granted Patent: US 9,642,287 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F28D 15/00 Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies F28D17/00, F28D19/00, F28D20/00 take precedence
• CPC Class Codes: F28D 2021/0028 for cooling heat generating elements, e.g. for cooling electronic components or electric devices for cooling semiconductors H01L23/34, for cooling electric apparatus H05K7/20
• CPC Class Codes: F28F 13/00 Arrangements for modifying heat-transfer, e.g. increasing, decreasing F28F1/00 - F28F11/00 take precedence
• CPC Class Codes: F28F 2270/00 Thermal insulation; Thermal decoupling
• CPC Class Codes: F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels F28D1/02, F28D1/03 take precedence
• CPC Class Codes: F28F 9/0204 for elongated header box, e.g. with transversal and longitudinal partitions
• CPC Class Codes: F28F 9/026 with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
• CPC Class Codes: H05K 7/20736 within cabinets for removing heat from server blades
• CPC Class Codes: H05K 7/20781 within cabinets for removing heat from server blades

Abstract

A channel distribution type cooling plate where a space between a first coolant storage part for inflow of coolant and a second cooling storage part for outflow of coolant formed at the two ends of an upper space of a main body provided with a lower space for removing heat of a heat generating member is partitioned by a meandering type partition wall to form coolant distribution paths connected to the first coolant storage part and coolant collection paths connected to the second coolant storage part, the bottom of the coolant distribution paths and the coolant collection paths are communicated by a plurality of through holes with the lower space, and side surfaces of the partition wall at the coolant distribution path sides are formed with subchannels for running coolant from the first coolant storage part, in order to improve the cooling efficiency at the coolant outlet side.

Claims

1. A cooling plate comprising:

a main body provided with an upper space and a lower space separated by a separating wall and having a bottom surface placed on a heat generating member,

a partition wall provided sticking out at said upper space side of said separating wall and partitioning the inside of said upper space into a first channel through which the coolant before absorbing heat flows and a second channel through which said coolant after absorbing heat of said heat generating member flows,

a plurality of through holes provided in said separating wall for running said coolant in said first channel into said lower space and running said coolant in said lower space into said second channel, and

a third channel provided in said partition wall and running part of said coolant before absorbing heat.

2. The cooling plate according to claim 1, wherein

said partition wall is a meandering type provided with folded back walls and side walls,

said first channel is formed from a first coolant storage part positioned at the outside of first walls of said folded back walls into which coolant flows from the outside and coolant distribution paths surrounded by the inner circumferential surfaces of the second walls of said folded back walls and said side walls positioned at the two sides of the same and connected to said first coolant storage part, and

said second channel is formed from a second coolant storage part positioned at the outside of the second walls of of said folded back walls at which said coolant discharged to the outside is collected and coolant collection paths surrounded by the inner circumferential surfaces of the the second walls of said folded back walls and said side walls positioned at the two sides of the same and connected to said second coolant storage part.

3. The cooling plate according to claim 2, wherein said through holes are provided at the bottom surfaces of said coolant distribution paths and the bottom surfaces of said coolant collection paths along the directions in which said coolant flows.

4. The cooling plate according to claim 2, wherein said third channel is formed at the side walls of said partition wall positioned at the two side surfaces of said coolant distribution paths.

5. The cooling plate according to claim 4, wherein said third channel is formed by pluralities of subchannels in parallel in up-down directions of side walls of said partition wall.

6. The cooling plate according to claim 4, wherein said third channel is formed by indentations in the side walls of said partition wall, the surfaces of said third channel contacting said coolant distribution paths are formed by members high in heat conductivity, and the remaining inner circumferential surfaces of said third channel have heat insulating members laid over them.

7. The cooling plate according to claim 1, wherein said third channel is formed at the insides of said partition wall.

8. The cooling plate according to claim 7, wherein said third channel is formed by pluralities of subchannels in parallel at the insides of said partition wall.

9. The cooling plate according to claim 2, wherein an outlet of said coolant of said third channel opens at a side wall of said partition wall facing said coolant collection paths.

10. The cooling plate according to claim 2, wherein an outlet of said coolant of said third channel opens at an inside of said second coolant storage part.

11. A data processing system provided with cooling plates which use a coolant to cool heat generating devices mounted on a board on which data processing circuits are formed, each said cooling plate comprising

a main body provided with an upper space and a lower space separated by a separating wall and having a bottom surface placed on a heat generating member,

a partition wall provided sticking out at said upper space side of said separating wall and partitioning the inside of said upper space into a first channel through which the coolant before absorbing heat flows and a second channel through which said coolant after absorbing heat of said heat generating member flows,

a plurality of through holes provided in said separating wall for running said coolant in said first channel into said lower space and running said coolant in said lower space into said second channel, and

a third channel provided in said partition wall and running part of said coolant before absorbing heat.

12. The data processing system provided with cooling plates according to claim 11, wherein said board is provided with a plurality of said heat generating devices, said heat generating devices respectively have said cooling plates attached to them, and said upper spaces of said cooling plates are connected in series.

13. The data processing system provided with cooling plates according to claim 11, wherein said board is provided with a plurality of said heat generating devices, said heat generating devices respectively have said cooling plates attached to them, and said upper spaces of said cooling plates are connected in parallel.