Thermal sink with an embedded heat pipe

• US 9,894,803 B1
• Filed: 11/18/2016
• Issued: 02/13/2018
• Est. Priority Date: 11/18/2016
• Status: Active Grant

• Current Assignee: Abaco Systems, Inc. (Ametek Incorporated)
• Original Assignee: Abaco Systems, Inc. (Ametek Incorporated)
• Inventors: Artis, Steven Daniel
• Primary Examiner(s): Dravininkas, Adam B
• Application Number:
  US15/355,764
• Time in Patent Office: 452 Days
• CPC Class Codes: F28D 15/0275 Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
• CPC Class Codes: F28F 1/02 Tubular elements of cross-section which is non-circular F28F1/08, F28F1/10 take precedence
• CPC Class Codes: F28F 1/04 polygonal, e.g. rectangular F28F1/022 takes precedence
• CPC Class Codes: F28F 1/12 the means being only outside the tubular element
• CPC Class Codes: F28F 21/084 from aluminium or aluminium alloys
• CPC Class Codes: F28F 21/085 from copper or copper alloys
• CPC Class Codes: F28F 2210/10 Particular layout, e.g. for uniform temperature distribution
• CPC Class Codes: H01L 23/3672 Foil-like cooling fins or heat sinks being part of lead-frames H01L23/49568
• CPC Class Codes: H01L 23/427 Cooling by change of state, e.g. use of heat pipes by liquefied gas H01L23/445
• CPC Class Codes: H01L 23/467 by flowing gases, e.g. air H01L23/473 takes precedence
• CPC Class Codes: H05K 1/0203 Cooling of mounted components H05K1/0272 takes precedence
• CPC Class Codes: H05K 7/20336 Heat pipes, e.g. wicks or capillary pumps
• CPC Class Codes: H05K 7/20409 Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing

Abstract

Heat sinks and thermal cooling systems are disclosed. The heat sinks and thermal cooling systems include fins, which extend away from a surface of a base of the heat sink, and which are located in a finned region on the surface. The heat sinks and thermal cooling systems also include one or more heat pipes that are positioned and shaped in a way so that a first portion of each heat pipe is in contact with the surface of the base, while at least a second portion of each heat pipe is raised above the surface of the base in into contact with fins in the finned region. Raising the heat pipes away from the surface of the base prevents components in contact with, or adjacent to, the base from being heated by the heat pipes.

Claims

1. A thermal sink comprising:

a heat sink at least partially comprised of thermally-conductive material, wherein the heat sink has a unitary, planar base portion comprising a first side that can be placed in contact with or proximate to one or more heat-producing components and a second side opposite the first side, said second side having a finned region and a non-finned region, said finned region with fins thereon and valleys between the fins, each fin having one or more heights;

one or more heat pipes each having a length, wherein at least one of the one or more heat pipes has at least a first portion of its length in contact with the non-finned region of the second side and at least a second portion of its length is at least partially embedded in the one or more heights of the fins of the finned region,

wherein the second portion of the at least one heat pipe embedded in the one or more heights of the fins of the finned region is elevated away from the valleys between the fins.

2. The thermal sink of claim 1, wherein the one or more heat pipes have a cross-section geometry consisting of one of circular, oval, square, rectangular, and triangular.

3. The thermal sink of claim 1, wherein the length of at least one of the one or more heat pipes extends at least partially across a length of the unitary, planar base portion of the heat sink.

4. The thermal sink of claim 1, wherein the length of at least one of the one or more heat pipes extends at least partially across a width of the unitary, planar base portion of the heat sink.

5. The thermal sink of claim 1, wherein the length of at least one of the one or more heat pipes extends beyond a length of the unitary, planar base portion of the heat sink.

6. The thermal sink of claim 1, wherein the length of at least one of the one or more heat pipes extends beyond a width of the unitary, planar base portion of the heat sink.

7. The thermal sink of claim 1, wherein the second portion of the at least one heat pipe embedded in the one or more heights of the fins of the finned region is in contact with one or more of the fins.

8. The thermal sink of claim 1, wherein the thermally-conductive material comprises aluminum 6101 or copper.

9. The thermal sink of claim 1, wherein the first portion of the length of the one or more heat pipes in contact with the non-finned region comprises the first portion at least partially embedded in the non-finned region of the heat sink.

10. The thermal sink of claim 1, wherein the one or more at least partially embedded in the one or more heights of the fins of the finned region comprises the heat pipes embedded in the one or more heights of the fins of the finned region such that a top of each of the heat pipes is flush with or below a top of the fins.

11. A thermal cooling system comprising:

a heat sink, wherein the heat sink is at least partially comprised of thermally-conductive material, wherein the heat sink has a unitary, planar base portion comprising a first side and a second side opposite the first side, said second side having a finned region and a non-finned region, said finned region with fins thereon and valleys between the fins, each fin having one or more heights; and

said heat sink further comprising one or more heat pipes each having a length, wherein at least one of the one or more heat pipes has at least a first portion of its length in contact with the non-finned region of the second side and at least a second portion of its length is at least partially embedded in the one or more heights of the fins of the finned region, wherein the second portion of the at least one heat pipe embedded in the one or more heights of the fins of the finned region is elevated away from the valleys between the fins;

a primary plate that at least partially covers and contacts the fins of the heat sink;

a printed circuit board (PCB) with one or more heat producing components on a first side of the PCB, wherein the first side of the heat sink is in contact with or proximate to at least one of the one or more heat producing components of the PCB; and

a finned plate in contact with or proximate to a second side of the PCB.

12. The thermal cooling system of claim 11, wherein the one or more heat pipes have a cross-section geometry consisting of one of circular, oval, square, rectangular, and triangular.

13. The thermal cooling system of claim 11, wherein the length of at least one of the one or more heat pipes extends at least partially across a length of the unitary, planar base portion of the heat sink.

14. The thermal cooling system of claim 11, wherein the length of at least one of the one or more heat pipes extends at least partially across a width of the unitary, planar base portion of the heat sink.

15. The thermal cooling system of claim 11, wherein the length of at least one of the one or more heat pipes extends beyond a length of the unitary, planar base portion of the heat sink.

16. The thermal cooling system of claim 11, wherein the length of at least one of the one or more heat pipes extends beyond a width of the unitary, planar base portion of the heat sink.

17. The thermal cooling system of claim 11, wherein the second portion of the at least one heat pipe embedded in the one or more heights of the fins of the finned region is in contact with one or more of the fins.

18. The thermal cooling system of claim 11, wherein the thermally-conductive material comprises aluminum 6101 or copper.

19. The thermal cooling system of claim 11, wherein the first portion of the length of the one or more heat pipes in contact with the non-finned region comprises the first portion at least partially embedded in the non-finned region of the heat sink.

20. The thermal cooling system of claim 11, wherein the one or more at least partially embedded in the one or more heights of the fins of the finned region comprises the heat pipes embedded in the one or more heights of the fins of the finned region such that a top of each of the heat pipes is flush with or below a top of the fins.