Claims
- 1. A cooling device boiling and condensing refrigerant, said cooling device for cooling a heat-generating member contained within a housing, comprising:
a first heat exchanger in which refrigerant flows, said first heat exchanger being disposed inside the housing to perform heat exchange between refrigerant and high-temperature first fluid within the housing; a second heat exchanger having upper and lower tanks and a plurality of tubes through which said upper and lower tanks communicate with each other, said second heat exchanger being disposed outside the housing to perform heat exchange between refrigerant flowing therethrough and low-temperature second fluid outside the housing; a first connection pipe through which gas refrigerant boiled in said first heat exchanger is introduced into said upper tank of said second heat exchanger; a second connection pipe through which liquid refrigerant condensed in said second heat exchanger is returned to said first heat exchanger from said lower tank of said second heat exchanger; and a diffusion unit which diffuses gas refrigerant flowing into said upper tank of said second heat exchanger to said upper tank.
- 2. The cooling device according to claim 1, wherein:
said diffusion unit is a diffusion plate having a plurality of openings each of which has opening area smaller than a passage sectional area of said first connection pipe; and said diffusion plate is disposed in said upper tank of said second heat exchanger between an open end of said first connection pipe and each open end of said tubes of said second heat exchanger in such a manner that said upper tank is divided into upper and lower parts.
- 3. The cooling device according to claim 2, wherein said diffusion plate has resistance means for resisting gas refrigerant flowing through said diffusion plate at a position opposite to said open end of said first connection pipe.
- 4. The cooling device according to claim 1, wherein said first connection pipe has a plurality of branched pipes connected to said upper tank of said second heat exchanger so that gas refrigerant is introduced into said upper tank of said second heat exchanger from said branched pipes.
- 5. The cooling device according to claim 1, wherein at least one of said first connection pipe and said second connection pipe is formed into a multi-pipe structure in which a plurality of pipes having different diameters are assembled approximately concentrically.
- 6. The cooling device according to claim 1, wherein:
said second connection pipe has a predetermined pipe length so that a predetermined reserve refrigerant is stored; and said second connection pipe has a lateral pipe portion extending approximately horizontally, said lateral pipe portion being disposed between said first heat exchanger and said second heat exchanger.
- 7. A cooling device boiling and condensing refrigerant, said cooling device for cooling a heat-generating member contained within a housing, comprising:
a first heat exchanger in which refrigerant flows, said first heat exchanger being disposed inside the housing to perform heat exchange between refrigerant and high-temperature first fluid within the housing; a second heat exchanger having upper and lower tanks having a longitudinal direction and a plurality of tubes through which said upper and lower tanks communicate with each other, said second heat exchanger being disposed outside the housing to perform heat exchange between refrigerant flowing therethrough and low-temperature second fluid outside the housing; a first connection pipe through which gas refrigerant boiled in said first heat exchanger is introduced into said upper tank of said second heat exchanger; and a second connection pipe through which liquid refrigerant condensed in said second heat exchanger is returned to said first heat exchanger from said lower tank of said second heat exchanger, wherein: said first connection pipe has a plurality of first branched pipes connected to said upper tank of said second heat exchanger; and said second connection pipe is connected to said lower tank of said second heat exchanger at a position approximately equal to one of said first branched pipes in said longitudinal direction.
- 8. The cooling device according to claim 7, wherein one of said first branched pipes at a downstream refrigerant side has a passage sectional area larger than that of an another of said first branched pipes at an upstream refrigerant side of said one.
- 9. The cooling device according to claim 7, wherein:
said second connection pipe has a plurality of second branched pipes connected to said lower tank of said second heat exchanger; and said second branched pipes of said second connection pipe have a number smaller than that of said first branched pipes of said first connection pipe.
- 10. The cooling device according to claim 7, wherein:
said second connection pipe has a plurality of second branched pipes connected to said lower tank of said second heat exchanger; and said first branched pipes are connected to said upper tank of said second heat exchanger and said second branched pipes are connected to said lower tank of said second heat exchanger in such a manner that the position relationship between said first branched pipes and said second branched pipes are left-right unsymmetrical.
- 11. The cooling device according to claim 7, wherein:
said second connection pipe has a plurality of second branched pipes connected to said lower tank of said second heat exchanger; and each of said second branched pipes is connected to said lower tank of said second heat exchanger at a position approximately equal to one of said first branched pipes connected to said upper tank of said second heat exchanger in said longitudinal direction.
- 12. The cooling device according to claim 11, wherein:
said first branched pipes are classified into a first group in which said first branched pipes are arranged at the positions approximately equal to the positions of said second branched pipes in said longitudinal direction, and a second group excepting from said first group; and said second group is arranged so that all said first branched pipes are approximately uniformly disposed in said longitudinal direction.
- 13. The cooling device according to claim 7, wherein at least one of said first connection pipe and said second connection pipe is formed into a multi-pipe structure in which a plurality of pipes having different diameters are assembled approximately concentrically.
- 14. The cooling device according to claim 7, wherein:
said second connection pipe has a predetermined pipe length so that a predetermined reserve refrigerant is stored; and said second connection pipe has a lateral pipe portion extending approximately horizontally, said lateral pipe portion being disposed between said first heat exchanger and said second heat exchanger.
- 15. A cooling device boiling and condensing refrigerant, said cooling device for cooling a heat-generating member contained within a housing, comprising:
a first heat exchanger in which refrigerant flows, said first heat exchanger being disposed inside the housing to perform heat exchange between refrigerant and high-temperature first fluid within the housing; a second heat exchanger in which refrigerant flows, said second heat exchanger being disposed outside the housing to perform heat exchange between refrigerant and low-temperature second fluid outside the housing; and a connection pipe which connects said first heat exchanger and said second heat exchanger in such a manner that gas refrigerant boiled in said first heat exchanger is introduced into said second heat exchanger and liquid refrigerant condensed in said second heat exchanger is introduced into said first heat exchanger, wherein said connection pipe is formed into a multi-pipe structure in which a plurality of pipes having different diameters are assembled approximately concentrically.
- 16. The cooling device according to claim 15, further comprising a partition plate for partitioning said connection pipe from said first fluid and said second fluid, wherein:
said connection pipe includes a connection end portion connected to said first heat exchanger and said second heat exchanger, and an extending portion extending in an up-down direction of said first and second heat exchangers; and said extending portion of said connection pipe is disposed at the same sides of said first and second heat exchangers.
- 17. The cooling device according to claim 15, wherein:
said connection pipe includes a first introduction pipe through which gas refrigerant boiled in said first heat exchanger is introduced into said second heat exchanger, and a second introduction pipe through which liquid refrigerant condensed in said second heat exchanger is introduced into said first heat exchanger; and at least one of said first introduction pipe and said second introduction pipe is formed into said multi-pipe structure.
- 18. The cooling device according to claim 15, wherein:
said connection pipe is composed of both inner and outer pipes having different diameters and assembled approximately concentrically; and said inner pipe has a passage sectional area equal to or larger than a passage sectional area between said outer pipe and said inner pipe.
- 19. The cooling device according to claim 15, wherein:
said connection pipe has a predetermined pipe length so that a predetermined reserve refrigerant is stored; and said connection pipe has a lateral pipe portion extending approximately horizontally, said lateral pipe portion being disposed between said first heat exchanger and said second heat exchanger.
- 20. A cooling device boiling and condensing refrigerant, said cooling device for cooling a heat-generating member contained within a housing, comprising:
a first heat exchanger in which refrigerant flows, said first heat exchanger being disposed inside the housing to perform heat exchange between refrigerant and high-temperature first fluid within the housing; a second heat exchanger in which refrigerant flows, said second heat exchanger being disposed at an upper side of said first heat exchanger, outside the housing, to perform heat exchange between refrigerant and low-temperature second fluid outside the housing; and a connection pipe which connects said first heat exchanger and said second heat exchanger circularly in such a manner that gas refrigerant boiled in said first heat exchanger is introduced into said second heat exchanger and liquid refrigerant condensed in said second heat exchanger is introduced into said first heat exchanger, wherein said connection pipe has a predetermined pipe length so that a predetermined reserve refrigerant is stored.
- 21. The cooling device according to claim 20, wherein:
said connection pipe has a lateral pipe portion disposed between said first heat exchanger and said second heat exchanger; and said lateral pipe portion extends approximately horizontally.
- 22. The cooling device according to claim 20, wherein:
said connection pipe has a lateral pipe portion disposed between said first heat exchanger and said second heat exchanger; and said lateral pipe portion is formed in a curved line.
- 23. The cooling device according to claim 20, wherein said connection pipe has a pipe length larger than 1.5 times of the shortest length for connecting said first heat exchanger and said second heat exchanger.
- 24. The cooling device according to claim 21, wherein:
said connection pipe includes a first introduction pipe through which gas refrigerant boiled in said first heat exchanger is introduced into said second heat exchanger, and a second introduction pipe through which liquid refrigerant condensed in said second heat exchanger is introduced into said first heat exchanger; one end of said first introduction pipe is connected to an upper portion of said first heat exchanger, and the other end thereof is connected to an upper portion of said second heat exchanger; one end of said second introduction pipe is connected to a lower portion of said second heat exchanger, and the other end thereof is connected to a lower portion of said first heat exchanger; and at least one of said first introduction pipe and said second introduction pipe has said lateral pipe portion.
- 25. The cooling device according to claim 24, wherein said lateral pipe portion is provided in said second introduction pipe.
- 26. The cooling device according to claim 20, wherein said connection pipe is detachably connected to said first heat exchanger and said second heat exchanger.
- 27. A cooling device boiling and condensing refrigerant, said cooling device for cooling a heat-generating member contained within a housing, comprising:
a first heat exchanger disposed inside the housing to perform heat exchange between refrigerant flowing therethrough and high-temperature first fluid within the housing, said first heat exchanger having upper and lower tanks and a plurality of tubes extending an up-down direction and communicating said upper and lower tanks; a second heat exchanger disposed outside the housing to perform heat exchange between refrigerant flowing therethrough and low-temperature second fluid outside the housing, said second heat exchanger having upper and lower tanks and a plurality of tubes extending in the up-down direction and communicating said upper and lower tanks; a first separator for partitioning an interior of said upper tank of said first heat exchanger into first and second upper tank portions; a second separator for partitioning an interior of said lower tank of said second heat exchanger into first and second lower tank portions; a first connection pipe through which said first upper tank portion of said first heat exchanger communicates with said first lower tank portion of said second heat exchanger; and a second connection pipe through which said second upper tank portion of said first heat exchanger communicates with said second lower tank portion of said second heat exchanger.
- 28. The cooling device according to claim 27, further comprising
a first cover which covers a part of said first heat exchanger at a side of said first upper tank portion and interrupts the flow of said first fluid on the part.
- 29. The cooling device according to claim 28, wherein said first upper tank portion of said first heat exchanger is shorter that said second upper tank portion of said first heat exchanger in a longitudinal direction of said upper and lower tanks.
- 30. The cooling device according to claim 28, further comprising
a second cover which covers a part of said second heat exchanger at a side of said second lower tank portion and interrupts the flow of said second fluid on the part.
- 31. The cooling device according to claim 30, wherein said second lower tank portion of said second heat exchanger is shorter that said first lower tank portion of said second heat exchanger in a longitudinal direction of said upper and lower tanks.
- 32. A cooling device boiling and condensing refrigerant, said cooling device for cooling a heat-generating member contained within a housing, comprising:
a first heat exchanger disposed inside the housing to perform heat exchange between refrigerant flowing therethrough and high-temperature first fluid within the housing, said first heat exchanger having a plurality of first tubes extending an up-down direction and a lower tank connecting each lower end of said first tubes; and a second heat exchanger disposed outside the housing to perform heat exchange between refrigerant flowing therethrough and low-temperature second fluid outside the housing, said second heat exchanger having a plurality of second tubes extending in the up-down direction and an upper tank connecting each upper end of said second tubes, wherein:
said first and second heat exchangers have a common tank connecting each upper end of said first tubes and each lower end of said second tubes; and said common tank has therein a common separator so that a large number of said first tubes communicates with a small number of said second tubes through said common tank, and a small number of said first tubes communicates with a large number of said second tubes through said common tank.
- 33. A cooling device for boiling and condensing refrigerant, the cooling device cooling a heat-generating member contained within a housing, comprising:
a first heat exchanger in which refrigerant flows, said first heat exchanger being disposed inside said housing to perform heat exchange between said refrigerant flowing therethrough and high-temperature first fluid within said housing; a second heat exchanger in which refrigerant flows, said second heat exchanger having upper and lower tanks extending in a tank longitudinal direction and a plurality of tubes through which said upper and lower tanks communicate with each other, said second heat exchanger being disposed outside said housing to perform heat exchange between said refrigerant flowing therethrough and low-temperature second fluid outside said housing; a first connection pipe through which gas refrigerant boiled in said first heat exchanger is introduced into said upper tank of said second heat exchanger; and a second connection pipe through which liquid refrigerant condensed in said second heat exchanger is returned to said first heat exchanger from said lower tank of said second heat exchanger, wherein:
said first connection pipe has a plurality of first branched pipes connected to said upper tank of said second heat exchanger; and said second connection pipe is connected to said lower tank of said second heat exchanger in such a manner that position relationships of said first branched pipes relative to said second connection pipe are left-right unsymmetrical.
- 34. The cooling device according to claim 33, wherein said second connection pipe is connected to said lower tank at a position approximately equal to one of said first branched pipes in said tank longitudinal direction.
- 35. The cooling device according to claim 33, wherein:
said second connection pipe has a plurality of second branched pipes connected to said lower tank of said second heat exchanger; and said second branched pipes of said second connection pipe have a number smaller than that of said first branched pipes of said first connection pipe.
- 36. The cooling device according to claim 33, wherein:
said second connection pipe has a plurality of second branched pipes connected to said lower tank of said second heat exchanger; and the position relationships of said first branched pipes relative to said second branched pipes are left-right unsymmetrical.
- 37. The cooling device according to claim 36, wherein:
said first branched pipes are classified into a first group in which said first branched pipes are arranged at the positions approximately equal to the positions of said second branched pipes in said longitudinal direction, and a second group excepting from said first group; and said second group is arranged so that all said first branched pipes are approximately uniformly disposed in said tank longitudinal direction.
- 38. The cooling device according to claim 33, wherein at least one of said first connection pipe and said second connection pipe is formed into a multi-pipe structure in which a plurality of pipes having different diameters are assembled approximately concentrically.
- 39. The cooling device according to claim 33, wherein:
said second connection pipe has a predetermined pipe length so that a predetermined reserve refrigerant is stored; and said second connection pipe has a lateral pipe portion extending approximately horizontally, said lateral pipe portion being disposed between said first heat exchanger and said second heat exchanger.
Priority Claims (5)
Number |
Date |
Country |
Kind |
09-340961 |
Dec 1997 |
JP |
|
09-341135 |
Dec 1997 |
JP |
|
09-341159 |
Dec 1997 |
JP |
|
10-16706 |
Jan 1998 |
JP |
|
10-50764 |
Mar 1998 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATION
1. This application is related to and claims priority from Japanese Patent Applications No. Hei. 9-340961 filed on Dec. 11, 1997, No. Hei. 9-341135 filed on Dec. 11, 1997, No. Hei. 9-341159 filed on Dec. 11, 1997, No. Hei. 10-16706 filed on Jan. 29, 1998, and No. Hei 10-50764 filed on Mar. 3, 1998, the contents of which are hereby incorporated by reference.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09193141 |
Nov 1998 |
US |
Child |
09726151 |
Nov 2000 |
US |