Heat-transfer member and cooling system

Patent metadata

Field	Value
Publication number	US-12222166-B2
Application number	US-202017600752-A
Country	US
Kind code	B2
Filing date	Apr 30, 2020
Priority date	May 9, 2019
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A heat-transfer member ( 1 ) is used in a cooling system in which an alcohol serves as a coolant. The heat-transfer member ( 1 ) has: a heat-receiving surface ( 11 ) configured such that it can receive heat from a heat-generating body; and a heat-dissipating surface ( 12 ) configured such that it can dissipate, to the coolant, the heat received at the heat-receiving surface ( 11 ). The heat-dissipating surface ( 12 ) has a plurality of pores ( 121 ) whose average pore diameter is 5 nm or more and 1,000 nm or less. A cooling system can be configured by causing the coolant to contact the heat-dissipating surface ( 12 ) of the heat-transfer member ( 1 ).

First claim

The invention claimed is:

1. A heat-transfer member configured for use in a cooling system, in which an alcohol serves as a coolant, wherein:
the heat-transfer member has:
a heat-receiving surface configured to receive heat from a heat-generating body; and
a heat-dissipating surface configured to dissipate, to the coolant, the heat received at the heat-receiving surface;

a plurality of pores are defined on the heat-dissipating surface and an average pore diameter of the pores is 5 nm or more and 1,000 nm or less;
the pores have an average depth of 0.05 μm or more and 10 μm or less; and
the heat-dissipating surface has a coolant-philic part that exhibits a contact angle with respect to ethanol of 40° or less.

2. The heat-transfer member according to claim 1 , wherein the heat-dissipating surface has a coolant-phobic part disposed adjacent to the coolant-philic part, the coolant-phobic part exhibiting a contact angle with respect to ethanol of 90° or more.

3. The heat-transfer member according to claim 2 , wherein the heat-dissipating surface has a plurality of the coolant-phobic parts.

4. The heat-transfer member according to claim 1 , wherein the average pore diameter is 10-1000 nm.

5. The heat-transfer member according to claim 1 , wherein the average pore diameter is 10-50 nm.

6. The heat-transfer member according to claim 1 , wherein the average pore depth is 0.1-10 μm.

7. The heat-transfer member according to claim 1 , wherein the heat-dissipating surface is anodized.

8. The heat-transfer member according to claim 1 , wherein at least some of the pores are located within the coolant-philic part.

9. The heat-transfer member according to claim 3 , wherein at least some of the pores are located within the coolant-philic part.

10. The heat-transfer member according to claim 9 , wherein two or more of the coolant-phobic parts are provided per square centimeter.

11. The heat-transfer member according to claim 10 , wherein the heat-dissipating surface is anodized.

12. The heat-transfer member according to claim 11 , wherein:
the average pore diameter is 10-50 nm, and
the average pore depth is 0.1-10 μm.

13. The heat-transfer member according to claim 1 , wherein:
the average pore diameter is 10-50 nm, and
the average pore depth is 0.1-10 μm.

14. The heat-transfer member according to claim 13 , wherein at least some of the pores are located within the coolant-philic part.

15. A cooling system comprising:
the heat-transfer member according to claim 1 ; and
a coolant.

16. The cooling system according to claim 15 , wherein the cooling system is configured such that, when the coolant begins to boil, the degree of superheating of the coolant on the heat-dissipating surface becomes 20 K or lower.

17. The cooling system according to claim 15 , wherein the coolant is ethanol.

18. The cooling system according to claim 15 , wherein the coolant has a boiling temperature less than 100° C.

19. The cooling system according to claim 18 , wherein:
the coolant comprises ethanol,
and
the heat-dissipating surface also has a coolant-phobic part disposed adjacent to the coolant-philic part, the coolant-phobic part exhibiting a contact angle with respect to ethanol of 90° or more.

20. The cooling system according to claim 19 , wherein:
the heat-dissipating surface has a plurality of the coolant-phobic parts,
the average pore diameter is 10-700 nm,
the heat-dissipating surface is anodized, and
at least some of the pores are located within the coolant-philic part.

Assignees

• Univ Kyushu Nat Univ Corp
• Uacj Corp

Inventors

• Takata Yasuyuki
• Takahashi Koji
• Shen Biao
• NUNOMURA Junji
• Bekki Yoichiro
• Fukatsu Akihiro

Classifications

• H10W40/73

  for cooling by change of state · CPC title

• H10W72/00

  Interconnections or connectors in packages · CPC title

• H05K7/20336

  Heat pipes, e.g. wicks or capillary pumps · CPC title

• F28F2260/00

  Heat exchangers or heat exchange elements having special size, e.g. microstructures · CPC title

• C09K5/048 Primary

  Boiling liquids as heat transfer materials · CPC title