Heat pipe

Abstract

A heat pipe includes: a container and a wick that is disposed inside the container. The container has a width, in a width direction that is orthogonal to an up-down direction and a longitudinal direction of the heat pipe, that is larger than a thickness in the up-down direction. A gap in the width direction is provided between an internal surface of the container and an external surface of the wick. A first end portion of the wick in the longitudinal direction includes concave portions depressed in the width direction at intervals in the longitudinal direction. A second end portion of the wick in the longitudinal direction does not have any concave portions. A width of the wick in the width direction is substantially equal throughout a total length of the wick in the longitudinal direction, except for a portion at which the concave portions are disposed.

1 . A heat pipe comprising:
 a container into which a working fluid is sealed; and   a wick that is disposed inside of the container, wherein   the container has a width, in a width direction that is orthogonal to both an up-down direction and a longitudinal direction of the heat pipe, that is larger than a thickness in the up-down direction,   a gap in the width direction is provided between an internal surface of the container and an external surface of the wick,   a first end portion of the wick in the longitudinal direction comprises a plurality of concave portions depressed in the width direction at intervals in the longitudinal direction,   a second end portion of the wick in the longitudinal direction does not have any concave portions, and   a width of the wick in the width direction is substantially equal throughout a total length of the wick in the longitudinal direction, except for a portion at which the plurality of concave portions is disposed.   
     
     
         2 . The heat pipe according to  claim 1 ,
 wherein the wick further comprises a liquid reservoir of the working fluid that extends in the longitudinal direction and is disposed at a different position from any one of the plurality of concave portions in the longitudinal direction within the wick.   
     
     
         3 . A heat pipe comprising:
 a container into which a working fluid is sealed; and   a wick that is disposed inside of the container, wherein   a gap is provided between an internal surface of the container and an external surface of the wick,   at least the external surface at a first end portion of a longitudinal direction, within the wick, has an uneven portion,   a liquid reservoir of the working fluid that extends in the longitudinal direction is disposed inside of the wick at a different position from the uneven portion in the longitudinal direction.   
     
     
         4 . The heat pipe according to  claim 1 , wherein the wick is made of a mesh material. 
     
     
         5 . The heat pipe according to  claim 1 , wherein the wick is joined to an upper wall and a lower wall of the container. 
     
     
         6 . The heat pipe according to  claim 2 , wherein
 the liquid reservoir of the working fluid extending in the longitudinal direction is disposed inside of the wick, and   a width of the liquid reservoir in the width direction is smaller than a width of a portion of the wick that is adjacent to the liquid reservoir.   
     
     
         7 . The heat pipe according to  claim 3 , wherein the wick is made of a mesh material. 
     
     
         8 . The heat pipe according to  claim 3 , wherein the wick is joined to an upper wall and a lower wall of the container. 
     
     
         9 . The heat pipe according to  claim 3 , wherein a width of the liquid reservoir in a width direction orthogonal to both the longitudinal direction and an up-down direction is smaller than a width of a portion of the wick that is adjacent to the liquid reservoir.