Heat dissipating structure and portable phone

• US 8,443,874 B2
• Filed: 01/28/2008
• Issued: 05/21/2013
• Est. Priority Date: 03/30/2007
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Mikami, Nobuhiro
• Primary Examiner(s): CIRIC, LJILJANA V
• Application Number:
  US12/593,434
• Publication Number:
  US 20100126708A1
• Time in Patent Office: 1,940 Days
• Field of Search: 165/10, 165/80.1, 165/80.2, 165/185, 165/276, 165/277
• US Class Current: 165/276
• CPC Class Codes: F28D 20/00 Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
• CPC Class Codes: F28F 13/00 Arrangements for modifying heat-transfer, e.g. increasing, decreasing F28F1/00 - F28F11/00 take precedence
• CPC Class Codes: G06F 1/203 for portable computers, e.g. for laptops
• CPC Class Codes: G06F 2200/203 Heat conductive hinge
• CPC Class Codes: H04B 1/036 Cooling arrangements
• CPC Class Codes: H04M 1/0216 Foldable in one direction, i.e. using a one degree of freedom hinge

Abstract

A heat dissipating structure and a portable device are provided, which enable that heat is dissipated from a heat generating part without causing a user to feel discomfort. A heat transfer member is configured to transfer heat generated in a heat generating body and a thermal storrage unit is thermally connected to the heat transfer member. The thermal storrage unit includes a pack with stretching property and a thermal storrage medium which is filled in the pack and a volume of which changes with a change in temperature. The pack is arranged such that there is a gap between the pack and a first heat dissipating portion at normal temperature and the pack contacts the first heat dissipating portion when the thermal storrage medium expands with a change in temperature.

Claims

1. A heat dissipating structure comprising:

a heat generating body;

a heat transfer member thermally connected to said heat generating body and configured to transfer heat generated in said heat generating body; and

a thermal storage unit thermally connected to said heat transfer member,

wherein said thermal storage unit includes;

a pack with stretching property; and

a thermal storage medium which is filled in said pack and a volume of which changes with a change in temperature,

said pack is arranged such that there is a gap between said pack and a first heat dissipating portion at normal temperature and said pack contacts said first heat dissipating portion when said thermal storage medium expands with a change in temperature,

said heat transfer member is in contact with a second heat dissipating portion a location of which is different from a location of said first heat dissipating portion,

the heat transfer member is configured to dissipate heat via said second heat dissipating portion,

said heat transfer member and said thermal storage unit are arranged in a first enclosure of a portable device in which said first enclosure and second enclosure are connected via a hinge unit such that said first enclosure and said second enclosure are freely opened and closed,

said first enclosure includes a side of said hinge unit and an opposite side of said hinge unit,

said first heat dissipating portion is a portion of said opposite side of said hinge unit, and

said second heat dissipating portion is arranged in said side of said hinge unit.

2. The heat dissipating structure according to claim 1, wherein

said opposite side of said hinge unit is farther from said hinge unit than said side of said hinge unit.

3. The heat dissipating structure according to claim 1, wherein said heat transfer member and said pack are bonded at least partially to one another.

4. The heat dissipating structure according to claim 1, wherein said thermal storage unit further includes a case configured to limit an expansion direction of said pack such that said pack expands toward said first heat dissipating portion.

5. The heat dissipating structure according to claim 4, wherein said case is made of metal.

6. The heat dissipating structure according to claim 4, wherein said thermal storage unit includes a plurality of thermal storage elements, and

said plurality of thermal storage elements are separated from each other by said case.

7. The heat dissipating structure according to claim 1, wherein said thermal storage medium is a material a volume of which changes with phase transition from solid phase to liquid phase.

8. The heat dissipating structure according to claim 7, wherein said thermal storage medium includes a paraffinic material.

9. The heat dissipating structure according to claim 1, wherein

said first heat dissipating portion is a portion of an inner wall of said first enclosure.

10. A portable device comprising:

a first enclosure;

a second enclosure; and

a hinge unit connecting said first enclosure and said second enclosure such that said first enclosure and said second enclosure are freely opened and closed, and

wherein said first enclosure encloses;

a board;

a heat generating body arranged on said board; and

the heat dissipating structure according to claim 1, which is configured to dissipate heat generated in said heat generating body,

said first enclosure includes a side of said hinge unit and an opposite side of said hinge unit,

said first heat dissipating portion is a portion of said opposite side of said hinge unit, and

said second heat dissipating portion is arranged in said side of said hinge unit.