VARIABLE CONDUCTANCE HEAT PIPE

• US 20100051240A1
• Filed: 08/27/2009
• Published: 03/04/2010
• Est. Priority Date: 08/28/2008
• Status: Abandoned Application

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Sato, Yukio, IPPOSHI, Shigetoshi, Nagayasu, Tetsuya, Hironaka, Shingo, Kitazaki, Kuraki
• Application Number:
  US12/548,861
• Publication Number:
  US 20100051240A1
• Time in Patent Office: Days
• US Class Current: 165/104.260
• CPC Class Codes: F28D 15/0233 the conduits having a particular shape, e.g. non-circular cross-section, annular F28D15/0241, F28D15/0266 take precedence
• CPC Class Codes: F28D 15/06 Control arrangements therefor
• CPC Class Codes: F28F 13/14 by endowing the walls of conduits with zones of different degrees of conduction of heat

Abstract

A variable conductance heat pipe is provided. The variable conductance heat pipe includes a sealed container in which a working fluid and a noncondensable gas are sealed, the sealed container extending in an axial direction. The sealed container includes one end to be connected to a heating source and a part to be connected to a heat sink. On a cross section of the sealed container along a direction orthogonal to the axial direction, a portion having water conveying property better than other portions is provided. The portion having the better water conveying property extends in the axial direction.

Claims

1. A variable conductance heat pipe comprising a sealed container in which a working fluid and a noncondensable gas are sealed, the sealed container extending in an axial direction, the sealed container including one end to be connected to a heating source and a part to be connected to a heat sink,

wherein, on a cross section of the sealed container along a direction orthogonal to the axial direction, a portion having water conveying property better than other portions is provided, and

wherein the portion having the better water conveying property extends in the axial direction.

2. The variable conductance heat pipe according to claim 1, further comprising an insertion member inserted eccentrically into the interior of the sealed container so as to configure the portion having the better water conveying property between an inner wall of the sealed container and the insertion member.

3. The variable conductance heat pipe according to claim 2,

wherein the insertion member is inserted eccentrically so that a flow path having a larger cross-sectional area and a flow path having a smaller cross-sectional area are configured along the axial direction of the sealed container between the inner wall of the sealed container and the inserted insertion member, and

wherein the larger cross-sectional area flow path and the smaller cross-sectional area flow path communicate with each other at least partially.

4. The variable conductance heat pipe according to claim 3,

wherein the insertion member is a board or a wire mesh.

5. The variable conductance heat pipe according to claim 3, further comprising a spacer so that the insertion member is kept separate from the inner wall of the sealed container.

6. The variable conductance heat pipe according to claim 2,

wherein the insertion member includes a portion having a larger cross-sectional area than other portions.

7. The variable conductance heat pipe according to claim 2,

wherein a rod is inserted eccentrically in the interior of the sealed container.

8. The variable conductance heat pipe according to claim 1,

wherein a spiral fine wire is provided to extend along an inner wall of the sealed container to configure the portion having better water conveying property.

9. The variable conductance heat pipe according to claim 1,

wherein a treatment for improving water conveying property is applied to a part of an interior wall of the sealed container to configure the portion having better water conveying property.

10. The variable conductance heat pipe according to claim 9,

wherein irregularities including a recessed portion and a raised portion extending in the axial direction are provided at a part of the inner wall of the sealed container to configure the portion having better water conveying property.

11. The variable conductance heat pipe according to claim 1,

wherein a part of an inner wall of the sealed container in cross section is deformed, so that the deformed portion configures the portion having better water conveying property.

12. The variable conductance heat pipe according to claim 1,

wherein the heating source is a semiconductor laser.