Heat pipe structure with an external liquid detouring path

Abstract

A heat pipe structure with an external liquid detouring path includes a main pipe having an interior space and divided into a top portion, a middle portion and a bottom portion. In the middle portion, a circular liquid-collecting groove facing the top portion is constructed for collecting a liquid drained down along the inner wall of the pipe. The heat pipe also includes a bifurcated pipe to detour the liquid in the liquid-collecting groove to the bottom portion of the heat pipe.

1 . A heat pipe structure, comprising a main pipe having an interior space accommodating a work fluid, the interior space being divided into thereof a top portion, a middle portion and a bottom portion, characterized in that: the middle portion has a circular liquid-collecting groove facing the top portion for collecting the work fluid in a liquid state drained down along an inner wall of the heat pipe, and a bifurcated pipe is included to bridge the liquid-collecting groove and the bottom portion for detouring the work fluid in the liquid-collecting groove to the bottom portion.  
   
   
       2 . The heat pipe structure according to  claim 1 , wherein said liquid-collecting groove is formed by said inner wall and an outer rim of a liquid-collecting ring plugged inside said middle portion, and the liquid-collecting ring further includes a through hole in communication spatially with both said top portion and said bottom portion.  
   
   
       3 . The heat pipe structure according to  claim 1 , wherein said main pipe is formed by joining an upper half pipe and a lower half pipe, in which the lower half pipe further includes a top end bent radial inward and upward to plug into the upper half pipe so as to form said liquid-collecting groove with said inner wall at the upper half pipe.  
   
   
       4 . The heat pipe structure according to  claim 1 , wherein said main pipe is formed by joining an upper half pipe and a lower half pipe, in which the upper half pipe further includes a bottom end bent radial inward and upward to form thereof said liquid-collecting groove.  
   
   
       5 . The heat pipe structure according to  claim 1 , wherein said main pipe is formed by joining an upper half pipe, a liquid-collecting ring and a lower half pipe, in which an upper portion of the liquid-collecting ring is located inside the upper half pipe so as to form said liquid-collecting groove in between with the upper half pipe.  
   
   
       6 . The heat pipe structure according to  claim 1 , wherein said bottom portion has a bottom end thereof enlarged to form a fluid room while a bottom of said main pipe corresponding to the fluid room is also extended to form a heat-collecting part to be mounted on a heat-generating device, wherein a lower end of said bifurcated pipe is connected to a top side of the heat-collecting part.  
   
   
       7 . The heat pipe structure according to  claim 1 , wherein said bottom portion has a bottom end thereof enlarged to form a fluid room while a bottom of said main pipe corresponding to the fluid room is also extended to form a heat-collecting part to be mounted on a heat-generating device, wherein a lower end of said bifurcated pipe is connected to a lateral side of the heat-collecting part.  
   
   
       8 . The heat pipe structure according to  claim 1 , wherein said inner wall of said main pipe located above said liquid-collecting groove is laminated with a capillary layer.  
   
   
       9 . A heat pipe structure, comprising: 
 an upper half pipe, formed as a pipe having an upper end sealed;    a lower half pipe, formed as a pipe having a lower end sealed;    a liquid-collecting ring, formed as a conical ring having a central through hole, located between the upper half pipe and the lower half pipe, further having an upper portion thereof located inside the upper half pipe so as to have a cavity between the upper portion and the upper half pipe formed as a liquid-collecting groove; and    a bifurcated pipe, further having an upper end and an opposing lower end, the upper end connecting with the liquid-collecting groove, the lower end connecting with a bottom of the lower half pipe close to the lower end.    
   
   
       10 . The heat pipe structure according to  claim 9 , wherein said liquid-collecting ring and the lower half pipe is made as a unique piece.  
   
   
       11 . The heat pipe structure according to  claim 9 , wherein said liquid-collecting ring and the upper half pipe is made as a unique piece.  
   
   
       12 . The heat pipe structure according to  claim 9 , wherein said bottom of said lower half pipe is enlarged to form a heat-collecting part to be mounted on a heat-generating device.  
   
   
       13 . The heat pipe structure according to  claim 9 , wherein said upper half pipe is laminated thereinside with a capillary layer.