Cylindrical heat pipe structure

Abstract

A cylindrical heat pipe structure includes a hollow pipe body. A working fluid is contained in the pipe body. Several trenches are formed on the inner surface of the pipe body. The cylindrical heat pipe structure further includes several rib pillars, which are powder sintered on the inner surface of the pipe body. The rib pillars are extended from the inner surface of the pipe body toward the center of the pipe body. A porous wick structure is formed on the surface of said rib pillars. The rib pillars are firmly sintered on the pipe body due to the presence of the trenches. The presence of trenches may also increase the condensation area, thereby increasing the condensation performance. The hot air generated by heat exchanging with the heat source may thus more rapidly be condensed into liquid. The condensed liquid may also rapidly move to the porous rib pillar and transfer to the bottom portion of the pipe body. The overall heat dissipation rate is thus enhanced.

1 . A cylindrical heat pipe structure, comprising: 
 a hollow pipe body, containing a working fluid, the inner surface of said hollow pipe body having a plurality of trenches; and    a plurality of rib pillars formed on the inner surface of said hollow pipe, extending toward the center of said hollow pipe body, wherein a porous wick structure is formed on the surface of said rib pillars.    
   
   
       2 . The cylindrical heat pipe structure as recited in  claim 1 , wherein said trenches are radially formed on the inner surface of said pipe body.  
   
   
       3 . The cylindrical heat pipe structure as recited in  claim 1 , wherein said rib pillars are powder sintered and firmly connected to said pipe body.