Electronic device

Patent metadata

Field	Value
Publication number	US-9013876-B2
Application number	US-201313796341-A
Country	US
Kind code	B2
Filing date	Mar 12, 2013
Priority date	Oct 31, 2012
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

An electronic device includes a housing, a heat source in the housing, and a heat dissipation device in the housing and separated from the heat source by a distance. The heat dissipation device includes a casing. A heat dissipation material is disposed in the casing. The heat dissipation material includes 15 to 30 percent volume of multiple copper materials, 50 to 85 percent volume of a phase change material, and 15 to 20 percent volume of air. The heat dissipation device has a surface facing the heat source. A central area and an outer ring area are defined on the surface. The outer ring area surrounds the central area. A geometric midpoint of the central area overlaps that of the surface. An orthographic projection region on the surface is in the outer ring area. The heat dissipation device absorbs heat from the heat source through thermal radiation.

First claim

What is claimed is:

1. An electronic device, comprising:
a housing;
a heat source, located inside the housing; and
a heat dissipation device, disposed in the housing, the heat dissipation device and the heat source being separated by a distance, the heat dissipation device comprising a casing, a heat dissipation material being disposed in the casing, and the heat dissipation material comprising 15 to 30 percent volume of multiple copper materials, 50 to 85 percent volume of a phase change material, and 15 to 20 percent volume of air, wherein the phase change material comprises an alkane;
wherein the casing has a surface facing the heat source, a central area and an outer ring area are defined on the surface, the outer ring area surrounds the central area, a geometric midpoint of the central area and a geometric midpoint of the surface overlap, the area of the central area is 10% to 50% of the area of the surface, an orthographic projection of the heat source to the surface forms an orthographic projection region located in the outer ring area, and the heat dissipation device absorbs heat from the heat source through thermal radiation.

2. The electronic device according to claim 1 , wherein the copper materials extend from the central area towards the outer ring area.

3. The electronic device according to claim 2 , wherein the copper materials are multiple copper tubes or multiple copper partition plates.

4. The electronic device according to claim 2 , wherein at least one of the copper materials overlaps the orthographic projection region of the heat source.

5. The electronic device according to claim 2 , wherein at least one of the copper materials passes through a geometric midpoint of the heat dissipation device.

6. The electronic device according to claim 2 , wherein respective ones of the copper materials extend to each corner portion of the casing of the heat dissipation device.

7. The electronic device according to claim 2 , wherein respective ones of the copper materials extend to each side edge of the casing of the heat dissipation device.

8. The electronic device according to claim 1 , wherein a plurality of aluminum partition plates are disposed in the casing, wherein the volume of the aluminum partition plates is less than 3% of the volume of the copper materials.

9. The electronic device according to claim 8 , wherein the aluminum partition plates surround a geometric midpoint of the heat dissipation device, and the copper materials are a plurality of copper partition plates that extend from corner portions and side edges of the aluminum partition plates to respective corners and side edges of the casing.

10. An electronic device comprising:
a heat source;
a housing enclosing the heat source;
a heat dissipation device comprising air and phase change material enclosed within a casing, wherein the air is more compressible than the phase change material so that the air gives up volume to the phase change material as the phase change material changes phase to absorb heat; and
copper tubes or plates disposed within the casing to distribute heat through the casing;
wherein the casing has a surface facing the heat source, a central area and an outer ring area are defined on the surface, the outer ring area surrounds the central area, a geometric midpoint of the central area and a geometric midpoint of the surface overlap, the area of the central area is 10% to 50% of the area of the surface, an orthographic projection of the heat source to the surface forms an orthographic projection region located in the outer ring area, and the heat dissipation device absorbs heat from the heat source through thermal radiation.

11. The electronic device according to claim 10 , wherein the phase change material changes phase between a solid state and a liquid state at a temperature between 15 and 45 degrees.

12. The electronic device according to claim 10 , wherein the phase change material comprises an alkane.

13. The electronic device according to claim 10 , wherein the phase change material comprises paraffin.

14. The electronic device according to claim 10 , wherein the air in the heat dissipation device takes up at least 15 percent of the volume of the heat dissipation device when the phase change material is in a low heat phase state.

15. The electronic device according to claim 10 , wherein the copper tubes or plates take up at least 15 percent of the volume of the heat dissipation device.

16. The electronic device according to claim 10 , wherein the copper tubes or plates extend radially from a central area of the casing surface through the outer ring area toward a perimeter of the casing.

17. The electronic device according to claim 16 , further comprising a plurality of aluminum partition plates disposed in the casing, wherein the volume of the aluminum partition plates is less than 3% of the volume of the copper materials.

18. The electronic device according to claim 17 , wherein the aluminum partition plates surround a geometric midpoint of the heat dissipation device.

19. The electronic device according to claim 18 , wherein copper tubes or plates extend from each corner portion and side edge of the aluminum partition plates to corresponding corner portions and side edges of the casing.

Assignees

• Inventec Pudong Tech Corp
• Inventec Corp

Inventors

• Cheng Yi-Lun
• Lin Ming-Hung
• Lin Chun-Lung

Classifications

• H05K7/20436

  Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing · CPC title

• G06F1/203 Primary

  for portable computers, e.g. for laptops · CPC title