Variable conductance heat pipe

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.

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.