Source: https://patents.google.com/patent/US8289701B2/en
Timestamp: 2020-04-09 11:52:54
Document Index: 436851740

Matched Legal Cases: ['application No. 07113054', 'application No. 07113057', 'application No. 2006', 'application No. 2006', 'application No. 2006', 'application No. 2006', 'Application No. 2006']

US8289701B2 - Liquid cooling unit and heat receiver therefor - Google Patents
Liquid cooling unit and heat receiver therefor Download PDF
US8289701B2
US8289701B2 US11/878,620 US87862007A US8289701B2 US 8289701 B2 US8289701 B2 US 8289701B2 US 87862007 A US87862007 A US 87862007A US 8289701 B2 US8289701 B2 US 8289701B2
US11/878,620
US20080024988A1 (en
2006-07-25 Priority to JP2006-202289 priority Critical
2006-07-25 Priority to JP2006202289A priority patent/JP2008027374A/en
2007-08-30 Assigned to FUJITSU LIMITED reassignment FUJITSU LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AOKI, MICHIMASA, HATTORI, MASAHIKO, OHNISHI, MASUO, SUZUKI, MASUMI, TSUNODA, YOSUKE
2008-01-31 Publication of US20080024988A1 publication Critical patent/US20080024988A1/en
2012-10-16 Publication of US8289701B2 publication Critical patent/US8289701B2/en
238000001816 cooling Methods 0 title claims description 40
239000002826 coolant Substances 0 claims abstract description 118
A heat receiver includes a casing defining a flow passage on a thermal conductive plate. The thermal conductive plate is received on an electronic component. The thermal conductive plate serves to transfer heat to coolant in the flow passage. At least two inflow nozzles extend into the casing to have discharge openings opposed to the upstream end of the flow passage. The coolant flows into the flow passage through the inflow nozzles. At least two streams of the coolant are thus generated in the flow passage. The streams widely expand or spread in the flow passage. The coolant flows through the flow passage without stagnating. The coolant can thus absorb the heat of the thermal conductive plate in an efficient manner. This results in an efficient heat absorption of the heat receiver.
The coolant flows into the flow passage through the single inflow nozzle. The stream of the coolant is generated on the extension of the inflow nozzle. The inflow nozzle is considerably narrower than the flow passage, so that the coolant stagnates at a position off the extension of the inflow nozzle. Heat cannot be transferred to the coolant from the thermal conductive plate in an efficient manner.
It is accordingly an object of the present invention to provide a heat receiver for a liquid cooling unit, a liquid cooling unit, and an electronic apparatus, enabling an efficient heat transfer.
According to a first aspect of the present invention, there is provided a heat receiver for a liquid cooling unit, comprising: a casing defining a flow passage on a thermal conductive plate; at least two inflow nozzles extending into the casing along parallel lines, the inflow nozzles having discharge openings at the upstream end of the flow passage, respectively; and an outflow nozzle extending into the casing, the outflow nozzle having an inflow opening at the downstream end of the flow passage.
The heat receiver includes the casing defining the flow passage on the thermal conductive plate. The thermal conductive plate receives heat for transfer to the coolant in the flow passage. At least two inflow nozzles extend into the casing to have the discharge openings opposed to the upstream end of the flow passage. The coolant flows into the flow passage through the inflow nozzles. At least two streams of the coolant are thus generated in the flow passage. The streams widely expand or spread in the flow passage. The coolant flows through the flow passage without stagnating. The coolant can thus absorb the heat of the thermal conductive plate in an efficient manner. This results in an efficient heat absorption of the heat receiver.
The flow passage may extend on the extensions of the inflow nozzles in the heat receiver. The inflow nozzles and the outflow nozzle may be opposed to each other. Alternatively, the inflow nozzles and the outflow nozzle may be oriented in the same direction. The heat receiver may further comprise heat radiating fins standing from the thermal conductive plate. The individual heat radiating fin extends in the direction of the coolant flow. The heat radiating fins may be arranged in a zigzag pattern. Heat is transmitted from the thermal conductive plate to the heat radiating fins. Since the heat radiating fins are arranged in a zigzag pattern in the direction of the coolant flow, the flow passage can be established between the adjacent heat radiating fins in the direction of the coolant flow. The coolant can flow through the flow passage without stagnating. The flowing coolant absorbs the heat of the heat radiating fins. The heat radiation is accelerated in this manner.
According to a second aspect of the present invention, there is provided a liquid cooling unit comprising: a closed circulating loop; a heat receiver inserted in the closed circulating loop, the heat receiver having a thermal conductive plate received on an electronic component; and a heat exchanger inserted in the closed circulating loop so as to absorb heat from coolant, wherein the heat receiver includes: a casing defining a flow passage on the thermal conductive plate; at least two inflow nozzles extending into the casing along parallel lines, the inflow nozzles having discharge openings at the upstream end of the flow passage, respectively; and an outflow nozzle extending into the casing, the outflow nozzle having an inflow opening at the downstream end of the flow passage.
The liquid cooling unit enables an efficient absorption of heat to the coolant in the heat receiver in the same manner as described above. The coolant circulates through the closed circulating loop incorporating the heat receiver. The heat exchanger is inserted in the closed circulating loop. The heat exchanger absorbs the heat of the coolant. The coolant then flows into the heat receiver. The electronic component can thus be cooled in an efficient manner.
The flow passage may extend on the extensions of the inflow nozzles in the liquid cooling unit in the same manner as described above. The inflow nozzles and the outflow nozzle may be opposed to each other. Alternatively, the inflow nozzles and the outflow nozzle may be oriented in the same direction. The liquid cooling unit may further comprise heat radiating fins standing from the thermal conductive plate. The individual heat radiating fin extends in the direction of the coolant flow. The hear radiating fins may be arranged in a zigzag pattern.
The heat receiver and the liquid cooling unit can be incorporated in an electronic apparatus. The electronic apparatus may comprise: an electronic component; a closed circulating loop; a heat receiver inserted in the closed circulating loop, the heat receiver having a thermal conductive plate received on the electronic component; and a heat exchanger inserted in the closed circulating loop so as to absorb heat from coolant, wherein the heat receiver includes: a casing defining a flow passage on the thermal conductive plate; at least two inflow nozzles extending into the casing along parallel lines, the inflow nozzles having discharge openings at the upstream end of the flow passage, respectively; and an outflow nozzle extending into the casing, the outflow nozzle having an inflow opening at the downstream end of the flow passage.
The casing 44 includes a depression 53 sinking from the thermal conductive plate 45 between the downstream end of the flow passage 46 and the outflow nozzle 48. The depression 53 provides a space 54 having the level lower than the flow passage 46 in the casing 44. The outflow nozzle 48 is designed to extend into the space 54. The inflow opening of the outflow nozzle 48 is thus opposed to the peripheral edge of the thermal conductive plate 45. The casing 44 likewise defines a depression 53 a sinking from the thermal conductive plate 45 between the upstream end of the flow passage 46 and the inflow nozzles 47, 47. The depression 53 a provides a space 54 a having the level lower than the flow passage 46 in the casing 44. The inflow nozzles 47, 47 are designed to extend into the space 54 a. The openings of the inflow nozzles 47 are in this manner opposed to the peripheral edge of the thermal conductive plate 45. The casing 44 also defines a top plate 55. The top plate 55 is opposed to the thermal conductive plate 45 and the depressions 53, 53 a, the top plate 55 and the thermal conductive plate 45 being connected by side wall 90.
a casing defining a flow passage on a planar thermal conductive plate, the casing including a bottom plate having a portion serving as the planar thermal conductive plate, a top plate extending in parallel with the planar thermal conductive plate and a side wall connecting a periphery of the bottom plate with a periphery of the top plate, the bottom plate further defining a depression adjacent to the planar thermal conductive plate for establishing a space in the casing connected to an upstream end of the flow passage, the depression having a bottom at a level lower than the flow passage;
at least two inflow nozzles extending into the side wall of the casing along parallel lines, each of the at least two inflow nozzles protruding into the space so as to have a tubular discharge opening at a position downstream of an upstream end of the space and upstream of the upstream end of the flow passage, respectively; and
a sole outflow nozzle extending into the casing, the sole outflow nozzle having an inflow opening facing a downstream end of the flow passage.
2. The heat receiver according to claim 1, wherein the flow passage extends on extensions of the at least two inflow nozzles.
3. The heat receiver according to claim 1, wherein each of the at least two inflow nozzles has a discharge opening facing towards an inflow opening of the sole outflow nozzle.
4. The heat receiver according to claim 1, wherein the at least two inflow nozzles and the sole outflow nozzle are oriented in a same direction.
5. The heat receiver according to claim 1, further comprising heat radiating fins standing from the planar thermal conductive plate, the heat radiating fins extending in a direction of a flow of a coolant, the heat radiating fins arranged in a zigzag pattern.
6. The heat receiver according to claim 1, wherein the flow passage extends straight from the at least two inflow nozzles to the sole outflow nozzle.
7. A liquid cooling unit comprising:
a casing defining a flow passage on the planar thermal conductive plate, the casing including a bottom plate having a portion serving as the planar thermal conductive plate, a top plate extending in parallel with the planar thermal conductive plan plate and a side wall connecting a periphery of the bottom plate with a periphery of the top plate, the bottom plate further defining a depression adjacent to the planar thermal conductive plate for establishing a space in the casing connected to an upstream end of the flow passage, the depression having a bottom at a level lower than the flow passage;
8. The liquid cooling unit according to claim 7, wherein the flow passage extends on extensions of the at least two inflow nozzles.
9. The liquid cooling unit according to claim 7, wherein each of the at least two inflow nozzles has a discharge opening facing towards an inflow opening of the sole outflow nozzle.
10. The liquid cooling unit according to claim 7, wherein the at least two inflow nozzles and the sole outflow nozzle are oriented in a same direction.
11. The liquid cooling unit according to claim 7, further comprising heat radiating fins standing from the planar thermal conductive plate, the heat radiating fins extending in a direction of a flow of the coolant, the heat radiating fins arranged in a zigzag pattern.
12. The liquid cooling unit according to claim 7, wherein the flow passage extends straight from the at least two inflow nozzles to the sole outflow nozzle.
a heat receiver inserted in the closed circulating loop, the heat receiver having a planar thermal conductive plate received on the electronic component; and a heat exchanger inserted in the closed circulating loop so as to absorb heat from a coolant, wherein the heat receiver includes:
a casing defining a flow passage on the planar thermal conductive plate, the casing including a bottom plate having a portion serving as the planar thermal conductive plate, a top plate extending in parallel with the planar thermal conductive plate and a side wall connecting a periphery of the bottom plate with a periphery of the top plate, the bottom plate further defining a depression adjacent to the planar thermal conductive plate for establishing a space in the casing connected to an upstream end of the flow passage, the depression having a bottom at a level lower than the flow passage;
14. The electronic apparatus according to claim 13, wherein the flow passage extends on extensions of the at least two inflow nozzles.
15. The electronic apparatus according to claim 13, wherein each of the at least two inflow nozzles has a discharge opening facing towards an inflow opening of the sole outflow nozzle.
16. The electronic apparatus according to claim 13, wherein the at least two inflow nozzles and the sole outflow nozzle are oriented in a same direction.
17. The electronic apparatus according to claim 13, further comprising heat radiating fins standing from the planar thermal conductive plate, the heat radiating fins extending in a direction of a flow of the coolant, the heat radiating fins arranged in a zigzag pattern.
18. The electronic apparatus according to claim 13, wherein the flow passage extends straight from the at least two inflow nozzles to the sole outflow nozzle.
US11/878,620 2006-07-25 2007-07-25 Liquid cooling unit and heat receiver therefor Expired - Fee Related US8289701B2 (en)
JP2006-202289 2006-07-25
JP2006202289A JP2008027374A (en) 2006-07-25 2006-07-25 Heat receiver for liquid cooling unit, liquid cooling unit, and electronic device
US20080024988A1 US20080024988A1 (en) 2008-01-31
US8289701B2 true US8289701B2 (en) 2012-10-16
ID=38664386
US11/878,620 Expired - Fee Related US8289701B2 (en) 2006-07-25 2007-07-25 Liquid cooling unit and heat receiver therefor
US (1) US8289701B2 (en)
EP (1) EP1883287B1 (en)
JP (1) JP2008027374A (en)
KR (1) KR100892626B1 (en)
CN (1) CN101115377A (en)
TW (1) TWI372968B (en)
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2006-07-25 JP JP2006202289A patent/JP2008027374A/en active Pending
2007-07-24 EP EP20070113051 patent/EP1883287B1/en not_active Expired - Fee Related
2007-07-24 TW TW096126925A patent/TWI372968B/en not_active IP Right Cessation
2007-07-25 KR KR1020070074557A patent/KR100892626B1/en not_active IP Right Cessation
2007-07-25 US US11/878,620 patent/US8289701B2/en not_active Expired - Fee Related
2007-07-25 CN CN 200710139091 patent/CN101115377A/en not_active Application Discontinuation
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EP1883287B1 (en) 2011-11-02
KR20080010331A (en) 2008-01-30
US20080024988A1 (en) 2008-01-31
TWI372968B (en) 2012-09-21
JP2008027374A (en) 2008-02-07
TW200819962A (en) 2008-05-01
EP1883287A1 (en) 2008-01-30
KR100892626B1 (en) 2009-04-09
CN101115377A (en) 2008-01-30
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SUZUKI, MASUMI;AOKI, MICHIMASA;TSUNODA, YOSUKE;AND OTHERS;REEL/FRAME:019790/0830