Granted Patent B2

US 12,222,166 · App. 17/600,752 · Granted Feb 11, 2025

Inventors: Yasuyuki Takata (Fukuoka, JP); Koji Takahashi (Fukuoka, JP); Biao Shen (Fukuoka, JP); Junji Nunomura (Hokkaido, JP); Yoichiro Bekki (Aichi, JP); Akihiro Fukatsu (Aichi, JP)

Assignees: Kyushu University, National University Corporation; UACJ Corporation

F28D15/046C09K5/048H01L23/427H05K7/20336F28F2260/00

Abstract

Claims (39)

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.

Assignments (3)

Priority Claims (1)

Continuity (1)

References Cited (19)