Heat Pipe with Advanced Capillary Structure

Abstract

A heat pipe has a wick of capillary structure formed on the inner wall of the heat pipe so as to form a working fluid path in the heat pipe, wherein the wick of the capillary structure is un-ringlike or various radially. The cross-section of the working fluid path in the heat pipe is in various shapes, such as in a shape of polygon, poly-petal, poly-serration, arc or semicircle. Thus, the thickness of the capillary wick structure on the inner wall of the heat pipe is various due to the shape of the working fluid path.

1 . A heat pipe with a wick of capillary structure, in which a capillary structure is formed on the inner wall of the heat pipe so as to form a working fluid path, wherein of the capillary wick structure is un-ringlike or various radially. 
   
   
       2 . The heat pipe as claimed in  claim 1 , wherein the cross-sectional of working fluid path in the heat pipe is a shape of polygon. 
   
   
       3 . The heat pipe as claimed in  claim 1 , wherein the cross-sectional of working fluid path in the heat pipe is a shape of poly-petal. 
   
   
       4 . The heat pipe as claimed in  claim 1 , wherein the cross-sectional of working fluid path in the heat pipe is a shape of poly-serration. 
   
   
       5 . The heat pipe as claimed in  claim 1 , wherein the capillary wick structure is formed at the part of the semicircle, or arc of the heat pipe, or gradually increases the thickness of wick, or increases by step. 
   
   
       6 . The heat pipe as claimed in  claim 1 , wherein the working fluid path of the present heat pipe is a combination of sections with different radius, such as two sections respectively, or multi-sections with different radius. 
   
   
       7 . The heat pipe as claimed in  claim 1 , wherein a reinforced layer is provided to be formed at the inner wall of the heat pipe to incorporate into the capillary wick structure for reinforcing the capillary wick structure and enhancing the capillary transfer function thereof. 
   
   
       8 . The heat pipe as claimed in  claim 7 , wherein a reinforced layer is a mesh layer. 
   
   
       9 . The heat pipe as claimed in  claim 1 , wherein a reinforced layer is fibers. 
   
   
       10 . The heat pipe as claimed in  claim 1 , wherein a reinforced layer is a porous material. 
   
   
       11 . The heat pipe as claimed in  claim 1 , wherein a reinforced layer is a plurality of slots on the inner wall of the heat pipe. 
   
   
       12 . The heat pipe as claimed in  claim 1 , wherein the heat pipe is further pressed in to a flat tube. 
   
   
       13 . The heat pipe as claimed in  claim 1 , wherein heat pipe is further bended into a continuous U-shape tube.