Porous media cold plate

• US 7,044,199 B2
• Filed: 10/20/2004
• Issued: 05/16/2006
• Est. Priority Date: 10/20/2003
• Status: Active Grant

• Current Assignee: Thermal Corporation (Roper Technologies, Inc.)
• Original Assignee: Thermal Corporation (Roper Technologies, Inc.)
• Inventors: North, Mark T., Schaeffer, C. Scott, Thayer, John G., Wert, Kevin L.
• Primary Examiner(s): Flanigan, Allen J.
• Application Number:
  US10/970,404
• Publication Number:
  US 20050082037A1
• Time in Patent Office: 573 Days
• Field of Search: 165/170
• US Class Current: 165/80.4
• CPC Class Codes: F28F 13/003 by using permeable mass, perforated or porous materials F28F13/18 takes precedence
• 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: H01L 23/3733 having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh, porous structures H01L23/3732, H01L23/3737 take precedence
• CPC Class Codes: H01L 23/473 by flowing liquids H01L23/4332, H01L23/4338 take precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: Y10S 165/907 Porous

Abstract

A heat exchanger for cooling a heat generating device including a base having a recess with a base coolant inlet opening and a base coolant outlet opening. A porous core is positioned within the recess of the base, and has a core coolant inlet opening and a core coolant outlet opening that are arranged in corresponding relation with base coolant inlet opening and a base coolant outlet opening so as to be in fluid communication. A porous gasket is pinched between the porous core and the base.

Claims

1. A heat exchanger for cooling a heat generating device comprising:

a base having a recess with a base coolant inlet opening and a base coolant outlet opening;

a porous core positioned within said recess and having a core coolant inlet opening and a core coolant outlet opening

a lid fitted to said base and enclosing said porous core;

an inlet plenum defined between said lid, said base, and said porous core, and an outlet plenum defined between said lid, said base, and said porous core wherein said inlet plenum and said outlet plenum are in fluid communication through said porous core; and

a porous gasket pinched between said porous core and said lid.

2. A heat exchanger according to claim 1 wherein said porous gasket comprises felt.

3. A heat exchanger according to claim 1 wherein said porous gasket comprises metal wool.

4. A heat exchanger according to claim 1 wherein said porous gasket is positioned atop an inner surface of said base, and comprises a compressible metal felt.

5. A heat exchanger according to claim 1 wherein said porous gasket is brazed to said base.

6. A heat exchanger according to claim 1 comprising a lid sized so as to correspond to the size of said base, and having an inner surface and a peripheral edge surface.

7. A heat exchanger according to claim 6 wherein said lid includes at least two fins that project outwardly from, and extend longitudinally along said inner surface in spaced apart relation to one another, wherein said porous core is positioned between said fins.

8. A heat exchanger according to claim 6 wherein said lid includes at a plurality of fins that project outwardly from, and extend longitudinally along said inner surface in spaced apart relation to one another, wherein said porous core is positioned between said fins and further wherein two outer most fins of said plurality of fins have an end that is adjacent to a wall portion of said base so as to define said inlet plenum and said outlet plenum.

9. A heat exchanger according to claim 7 wherein each of said fins includes a coolant inlet opening and a coolant outlet opening that are spaced apart by a distance that is about one-third the total length of said porous core.

10. A heat exchanger according to claim 7 wherein each of said fins includes an elongate top surface that has a height above said inner surface that varies from fin to fin.

11. A heat exchanger according to claim 1 wherein said base coolant inlet opening is coaxial with said core coolant inlet openings, and said base coolant outlet opening is coaxial with said core outlet openings.

12. A heat exchanger according to claim 7 wherein said porous media is located on said inner surface and between adjacent fins so as to form a plurality of heat transfer cores that comprise a plurality of brazed particles.

13. A heat exchanger according to claim 12 wherein said plurality of heat transfer cores define an elongate, uneven top surface that is substantially coextensive with a top surface of each of said fins.

14. A heat exchanger according to claim 12 wherein said particles are selected from the group consisting of carbon, tungsten, copper, aluminum, magnesium, nickel, gold, silver, aluminum oxide, or beryllium oxide.

15. A heat exchanger according to claim 12 wherein the shape of said particles is selected from the group consisting of substantially spherical, oblate, prolate spheroids, regular polygonal, or filament-shaped.

16. A heat exchanger for cooling a heat generating device comprising:

a base having a recess with a base coolant inlet opening and a base coolant outlet opening;

a porous core positioned within said recess and having a core coolant inlet opening, a core coolant outlet opening and defining an inlet plenum and an outlet plenum that are located between said base and said porous core;

a lid fitted to said base and enclosing said porous core; and

a porous gasket pinched between said porous core and said lid.

17. A heat exchanger for cooling a heat generating device comprising:

a base having a recess with a base coolant inlet opening and a base coolant outlet opening;

a lid sized so as to correspond to the size of said base, and having an inner surface with a plurality of fins that project outwardly from, and extend longitudinally along said inner surface in spaced apart relation to one another, each of said fins positioned within said recess and including a coolant inlet opening arranged in coaxial relation with said base coolant inlet opening and a coolant outlet opening arranged in coaxial relation with said base coolant outlet opening, wherein two outer most fins of said plurality of fins have an end that is adjacent to a wall portion of said base so as to define said inlet plenum and said outlet plenum;

a porous core positioned between said fins and within said recess and having a core coolant inlet opening and a core coolant outlet opening; and

a metal felt gasket pinched between said porous core and said base.

18. A pumped, single phase heat exchanger for cooling a heat generating device comprising:

a base having a recess with a base coolant inlet opening and a base coolant outlet opening;

a lid including a plurality of spaced-apart fins projecting outwardly from a surface and including a porous media positioned between adjacent ones of said fins so as to form a core, wherein said fins and said cores include a core coolant inlet opening and a core coolant outlet opening and wherein two outer most fins of said plurality of fins have an end that is adjacent to a wall portion of said base so as to define said inlet plenum and said outlet plenum that are located between said base and said porous core and fins; and

a porous gasket positioned within said recess and between said base and said fins and said porous media.

19. A heat exchanger according to claim 18 wherein said porous gasket comprises a compressible metal felt.

20. A heat exchanger according to claim 18 wherein said porous gasket comprises a compressible metal wool.

21. A heat exchanger according to claim 18 wherein said porous gasket is positioned atop an inner surface of said base, and comprises a metal felt.

22. A heat exchanger according to claim 18 wherein said porous gasket is brazed to said base.

23. A heat exchanger according to claim 18 comprising a lid sized so as to correspond to the size of said base, and having an inner surface and a peripheral edge surface.

24. A heat exchanger according to claim 18 wherein each of said fins includes an elongate top surface that has a height above said inner surface that varies from fin to fin.

25. A heat exchanger according to claim 18 wherein said base coolant inlet opening is coaxial with said core coolant inlet openings, and said base coolant outlet opening is coaxial with said core outlet openings.

26. A heat exchanger according to claim 18 wherein said porous media comprises a plurality of brazed particles, and is located on an inner surface of said lid between adjacent fins so as to form a plurality of heat transfer cores.

27. A heat exchanger according to claim 26 wherein said plurality of heat transfer cores define an elongate, uneven top surface that is substantially coextensive with a top surface of each of said fins.

28. A heat exchanger according to claim 26 wherein said particles are selected from the group consisting of carbon, tungsten, copper, aluminum, magnesium, nickel, gold, silver, aluminum oxide, or beryllium oxide.

29. A heat exchanger according to claim 26 wherein the shape of said particles is selected from the group consisting of substantially spherical, oblate, prolate spheroids, regular polygonal, or filament-shaped.

30. A pumped, single phase heat exchanger for cooling a heat generating device comprising:

a base having a peripheral wall that defines a recess, said peripheral wall further defining first inlet opening and a first outlet opening that communicate with said recess;

a lid having an inner surface including a plurality of spaced-apart fins projecting outwardly from said inner surface wherein said fins comprise variations in height relative to said inner surface and further wherein spaced apart outer ones of said fins abut a portion of said base so as to define an inlet plenum and an outlet plenum that are located between said base and said fins;

a brazed porous media positioned between adjacent ones of said fins so as to form a plurality of porous cores, wherein said porous cores comprise variations in height relative to said inner surface and said fins, said brazed porous media and said fins further defining a second inlet opening and a second outlet opening, and further wherein said fins and said plurality of porous cores are sized and shaped so as to be complementary with said recess; and

a porous and compressible gasket positioned within said recess and between said base and said fins and said porous cores, so as to compressibly compensate for said variations in height.