Heat pipe with complex capillary structure

Abstract

A heat pipe with complex capillary structures includes a tubular body in which a first capillary section and a second capillary section are disposed. The tubular body has a chamber and a bottom wall disposed under the chamber. The chamber is sequentially divided into an evaporation section, a transfer section and a condensation section. The first capillary section is a knitted mesh body attached to the bottom wall of the evaporation section of the tubular body. The second capillary section is a braid body extending in axial direction of the tubular body from the evaporation section through the transfer section to the condensation section. The second capillary section in the evaporation section is overlapped on the first capillary section. Accordingly, the heat pipe has an ultrathin structure, while still able to transfer heat at higher efficiency.

What is claimed is: 
     
         1 . A heat pipe with complex capillary structures, comprising:
 a tubular body having a chamber and a bottom wall disposed under the chamber, the chamber being sequentially divided into an evaporation section, a transfer section and a condensation section, a first capillary section being attached to the bottom wall of the evaporation section of the tubular body, the first capillary section being a knitted mesh body formed of multiple fiber wires interlaced with each other; and   a second capillary section, which is a braid body formed of multiple strands or bundles of fiber wires interlaced and tangled with each other, the second capillary section extending in axial direction of the tubular body from the evaporation section through the transfer section to the condensation section.   
     
     
         2 . The heat pipe as claimed in  claim 1 , wherein the second capillary section in the evaporation section is overlapped on the first capillary section. 
     
     
         3 . The heat pipe as claimed in  claim 2 , wherein the fiber wires of the first and second capillary sections are made of metal material or nonmetal material such as fiber glass or fiber carbon. 
     
     
         4 . The heat pipe as claimed in  claim 3 , wherein the first and second capillary sections are made of the same material or different materials. 
     
     
         5 . The heat pipe as claimed in  claim 3 , wherein the density of the first capillary section is smaller than or larger than the density of the second capillary section. 
     
     
         6 . The heat pipe as claimed in  claim 1 , wherein the evaporation section has an inner surface on an inner side of the bottom wall and an outer surface on an outer side of the bottom wall, the outer surface being removably in contact with a heat generation component. 
     
     
         7 . The heat pipe as claimed in  claim 6 , wherein the second capillary section is positioned at the center of the chamber. 
     
     
         8 . The heat pipe as claimed in  claim 6 , wherein the second capillary section is positioned on one side of the chamber. 
     
     
         9 . The heat pipe as claimed in  claim 8 , further comprising another second capillary section positioned on the other side of the chamber. 
     
     
         10 . The heat pipe as claimed in  claim 6 , wherein the first capillary section is attached to and coated on the inner surface of the evaporation section. 
     
     
         11 . The heat pipe as claimed in  claim 10 , wherein the tubular body has two sidewalls, the first capillary section having a left side and a right side in adjacency to the two sidewalls of the tubular body respectively, the left and right sides defining a first width. 
     
     
         12 . The heat pipe as claimed in  claim 11 , wherein the second capillary section has a left side and a right side, the left and right sides defining a second width, the second width being smaller than the first width. 
     
     
         13 . The heat pipe as claimed in  claim 2 , wherein at least one face of the tubular body in adjacency to the chamber is a free face.