Cold plate having uniform pressure drop and uniform flow rate

• US 5,983,997 A
• Filed: 10/17/1996
• Issued: 11/16/1999
• Est. Priority Date: 10/17/1996
• Status: Expired due to Fees

• Current Assignee: Brazonics, Inc. (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Brazonics, Inc. (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Hou, Kai
• Primary Examiner(s): ATKINSON, CHRISTOPHER MARK
• Application Number:
  US08/733,615
• Time in Patent Office: 1,125 Days
• Field of Search: 165/80.4, 165/80.3, 165/144, 165/145, 165/185, 361/699, 361/694, 361/693, 361/690, 257/722, 257/721, 257/714
• US Class Current: 165/144
• CPC Class Codes: F28F 3/027 with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
• 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 9/26 Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators connecting different sections in water heaters F24H9/14 , connecting headers with inlet or outlet fittings F28F9/0246
• CPC Class Codes: H05K 7/20254 Cold plates transferring heat from heat source to coolant

Abstract

A system for cooling electronic components includes a cold plate having a channel through which a fluid coolant is transported, a plurality of bosses each receiving an electronic, optical, or other heat-generating component, and a plurality of fin structures, at least three of which are adjacently disposed in a sequential order on the cold plate. Each fin structure contacts a boss, and has a fin inlet and a fin outlet in fluid communication with a section of the channel for supplying the area around the boss with coolant and cooling the component seated on the boss. A portion of the channel defines a serpentine path for transporting the fluid coolant to the at least three sequential fin structures in a non-sequential order. Sections of the channel in the serpentine path further transport the coolant in opposite directions, thus enhancing heat transfer and temperature equilibration across the cold plate. The system can further include a plurality of such cooling plates disposed in a vertical stack, and a manifold delivering coolant to the cooling plates. When the cooling plates are stacked, the flow rate and pressure drop across each plate is substantially uniform, thus providing a cold plate having a substantially isothermal surface across a portion of the cold plate.

Claims

1. A system for cooling at least one heat-generating component comprising:

a cold plate having channel sections defining a channel through which a fluid coolant is transported, and having a plurality of bosses each for receiving the heat-generating component;

at least three fin structures adjacently disposed in a sequential order on the cold plate, each fin structure contacting a boss, and comprising a fin inlet and a fin outlet in fluid communication with a section of the channel, the channel transporting the fluid coolant to the fin structures in non-sequential order; and

a first channel section in fluid communication with a first fin structure and disposed adjacent a second channel section in fluid communication with a second fin structure, the first channel section transporting the fluid coolant in a first direction, and the second channel section transporting the fluid coolant in a direction opposite the first direction;

whereby the fluid coolant flowing in the second channel section counterflows against the fluid coolant flowing in the first channel section, thereby transferring heat from the fluid coolant in the second channel section to the fluid coolant in the first channel section.

2. The system according to claim 1, wherein each boss is structured to receive an electronic component as the heat generating component.

3. The system according to claim 1, wherein each boss is disposed adjacent the channel.

4. The system according to claim 1, wherein the fin structures adjacently disposed in sequential order, are arranged in alignment.

5. The system according to claim 1, further comprising a manifold delivering the fluid coolant to the cold plate.

6. The system according to claim 1, the channel further defining a serpentine path.

7. The system according to claim 1, wherein the fin structures are sequentially disposed such that the first fin structure is disposed adjacent the second fin structure, and the second fin structure is disposed adjacent a third fin structure.

8. The system according to claim 7, wherein the channel further transports the fluid coolant from the first fin structure to the third fin structure and then to the second fin structure.

9. A system for cooling at least one heat-generating components comprising:

a manifold for delivering a fluid coolant;

a plurality of cold plates disposed in a vertical stack, each cold plate having channel sections defining a channel through which a fluid coolant is received from the manifold and transported, and having a plurality of bosses each for receiving a heat-generating component and being disposed adjacent the channel;

at least three fin structures adjacently disposed in a sequential order on each cold plate, each fin structure surrounding a boss and comprising a fin inlet and a fin outlet in fluid communication with a section of the channel, the channel transporting the fluid coolant to the fin structures in non-sequential order; and

a first channel section in fluid communication with a first fin structure and disposed adjacent a second channel section in fluid communication with a second fin structure, the first channel section transporting coolant in a first direction, and the second channel section transporting coolant in a direction opposite the first direction;

whereby the fluid coolant flowing in the second channel section counterflows against the fluid coolant flowing in the first channel section, thereby transferring heat from the fluid coolant in the second channel section to the fluid coolant in the first channel section.

10. The system according to claim 9, each of the cold plates further comprising a fluid inlet having an orifice, wherein the diameter of each orifice is a substantially equivalent.

11. The system according to claim 9, wherein the channel defines a serpentine path.

12. The system according to claim 9, wherein the fin structures are sequentially disposed such that the first fin structure is disposed adjacent the second fin structure, and the second fin structure is disposed adjacent a third fin structure.

13. The system according to claim 12, wherein the channel further transports the fluid coolant from the first fin structure to the third fin structure and then to the second fin structure.

14. The system according to claim 13, wherein the flow rate of the fluid coolant delivered by the manifold to the plurality of cold plates is substantially equivalent across each cold plate.

15. The system according to claim 14, wherein a pressure drop across each cold plate is substantially equivalent.

16. A method of cooling at least one heat-generating component, comprising:

providing a plurality of cold plates disposed in a stacked configuration, each cold plate defining a channel through which a fluid coolant is received and transported, a plurality of bosses each for receiving a heat-generating component, each boss being disposed adjacent the channel, at least three fin structures adjacently disposed in a sequential order on the cold plate, each fin structure surrounding a boss and having a fin inlet and a fin outlet in fluid communication with the channel, and a first channel section in fluid communication with a first fin structure and disposed adjacent a second channel section in fluid communication with a second fin structure;

delivering fluid coolant to the channel in each of the cold plates via a manifold;

transporting fluid coolant through the first channel section in each cold plate in a first direction;

transporting fluid coolant through the second channel section in each cold plate in a direction opposite the first direction, whereby the fluid coolant flowing in the second channel section counterflows against the fluid coolant flowing in the first channel section, thereby transferring heat from the fluid coolant in the second channel section to the fluid coolant in the first channel section; and

transporting fluid coolant through each channel of each cold plate such that the fluid coolant is delivered to the fin structures of each cold plate in a non-sequential order, causing the flow rate of the fluid coolant to be substantially equivalent across each cold plate.

17. The method of cooling according to claim 16, wherein the pressure drop across each cold plate is substantially equivalent.

18. The method of cooling according to claim 16, wherein the fluid coolant flows through the channel in a serpentine path.

19. The method of cooling according to claim 16 wherein the fin structures are sequentially disposed on each cold plate such that the first fin structure is disposed adjacent the second fin structure, and the second fin structure is disposed adjacent a third fin structure;

and wherein the method further comprises the step of;

delivering the fluid coolant in a non-sequential manner through the channel such that the fluid coolant is transported to the first fin structure, and then to the third fin structure, and then back to the second fin structure.

20. The method of cooling according to claim 19, further comprising:

delivering the fluid coolant from the third fin structure to any of the other fin structures in a sequential manner.