Vapor chamber

Patent metadata

Field	Value
Publication number	US-12501582-B2
Application number	US-202318308501-A
Country	US
Kind code	B2
Filing date	Apr 27, 2023
Priority date	Mar 31, 2021
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A vapor chamber including a container having a cavity portion formed inside, and including a first surface and a second surface opposing the first surface, a working fluid sealed in the cavity portion, and a vapor flow path through which the working fluid in a gas phase flows, the vapor flow path being provided in the cavity portion, wherein a container inner surface area increasing unit including a protruding part is formed on an inner surface of the first surface, and a first wick structure is provided on a surface of the protruding part.

First claim

What is claimed is:

1 . A vapor chamber comprising a container having a cavity portion formed inside, and including a first plate-shaped body and a second plate-shaped body opposing the first plate-shaped body, a working fluid sealed in the cavity portion, and a vapor flow path through which the working fluid in a gas phase flows, the vapor flow path being provided in the cavity portion,
wherein the container is formed by overlapping the first plate-shaped body and the second plate-shaped body opposing the first plate-shaped body, wherein an evaporator including a protruding part is formed on an inner surface of the first plate-shaped body, a first wick structure is provided on a surface of the protruding part, a third wick structure is provided outside the evaporator, on the first plate-shaped body, and the third wick structure is connected to the first wick structure, wherein a second wick structure is further provided on the first wick structure, the second wick structure comprising a first plurality of second wick structures and, a second plurality of second wick structures, a vertically laminated structure of wick structures having the first wick structure and one of the first plurality of second wick structures, wherein the vertically laminated structure of wick structures is between a top surface of the protruding part and an inner surface of the second plate-shaped body, the one of the first plurality of second wick structures extends in an inner surface direction of the second plate-shaped body from a tip end of the protruding part, and contacts the inner surface of the second plate-shaped body, the evaporator includes a plurality of protruding parts comprising the protruding part, and the plurality of protruding parts are separated from each other by 0.4 mm or more, one of the second plurality of second wick structures is provided on the first wick structure and between the plurality of protruding parts, wherein the one of the second plurality of second wick structures is separated from another one of the second plurality of second wick structures by one protruding part of the plurality of protruding parts, the cavity portion is formed between the first plurality of second wick structures, projection parts that project to the second plate-shaped body from the tip ends of the protruding parts and are disposed in another inner surface direction are provided at some protruding parts of the plurality of protruding parts, the projection parts next to each other are connected by the first plurality of second wick structures, and the inner surface of the second plate-shaped body is included in the vapor flow path.

2 . The vapor chamber according to claim 1 , wherein a ratio of a height of the protruding part to a thickness of the protruding part is 1.0 or more and 3.0 or less.

3 . The vapor chamber according to claim 1 , wherein a thickness of the first wick structure is 0.1 mm or more and 1.0 mm or less.

4 . The vapor chamber according to claim 1 , wherein the surface of the protruding part is covered with the first wick structure.

5 . The vapor chamber according to claim 4 , wherein the first wick structure extends among the plurality of the protruding parts on the inner surface of the first plate-shaped body.

6 . The vapor chamber according to claim 1 , wherein the first wick structure extends among the plurality of the protruding parts on the inner surface of the first plate-shaped body.

7 . The vapor chamber according to claim 1 , wherein the second wick structure has a smaller capillary force than the first wick structure.

8 . The vapor chamber according to claim 7 , wherein the one of the first plurality of second wick structures is further provided on the first wick structure among the plurality of the protruding parts on the inner surface of the first plate-shaped body.

9 . The vapor chamber according to claim 1 , wherein the one of the first plurality of second wick structures contacts the inner surface of the second plate-shaped body.

10 . The vapor chamber according to claim 1 , wherein the one of the first plurality of second wick structures is further provided on the first wick structure among the plurality of the protruding parts on the inner surface of the first plate-shaped body.

11 . The vapor chamber according to claim 1 , wherein the first wick structure is a sintered body of powder, and the second wick structure is a sintered body of powder.

12 . The vapor chamber according to claim 11 , wherein an average primary particle size of a first powder that is a raw material of the first wick structure is smaller than an average primary particle size of a second powder that is a raw material of the second wick structure.

13 . The vapor chamber according to claim 1 , wherein the evaporator comprises plate-shaped fins, pin fins and/or recesses.

14 . The vapor chamber according to claim 1 , wherein an entire first planar-shaped body is a planar part, and the evaporator is formed on an inner surface of the planar part.

15 . The vapor chamber according to claim 1 , wherein the container includes a planar portion and a projection portion projected in an outward direction from the planar portion.

16 . The vapor chamber according to claim 1 , wherein a block-shaped wick member is further provided between the first plurality of second wick structures and the second plate-shaped body.

17 . The vapor chamber according to claim 1 , wherein the one of the second plurality of second wick structures is further provided between the cavity portion and the first wick structure.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Kawabata Kenya
• Inagaki Yoshikatsu
• Aoki Hirofumi
• Okada Hiroshi
• Watanabe Yosuke
• Kawabata Hideaki

Classifications

• H10W40/73

  for cooling by change of state · CPC title

• F28F3/12

  Elements constructed in the shape of a hollow panel, e.g. with channels {(F28D1/02, F28D1/03 take precedence)} · CPC title

• F28D15/0233

  the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take precedence) · CPC title

• H05K7/20336 Primary

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

• F28D15/04 Primary

  with tubes having a capillary structure · CPC title