Heat pipe structure having strip-shaped capillary tissue at both side ends thereof

Abstract

A heat pipe structure includes a pipe shell ( 1 ) and a capillary tissue ( 2 ) disposed in the pipe shell ( 1 ). A pipe body ( 10 ) has a hollow vapor channel ( 100 ) along a longitudinal direction thereof and sealing a working fluid. The capillary tissue ( 2 ) has two strip-shaped primary capillary portions ( 20, 21 ) passing through the vapor channel ( 100 ) and a connecting capillary portion ( 22 ) connecting the two primary capillary portions ( 20, 21 ). The two primary capillary portions ( 20, 21 ) extend along a longitudinal direction of the pipe shell ( 1 ) and are immediately adjacent to respective side walls ( 103 ) of the pipe body ( 10 ) along the longitudinal direction thereof. The connecting capillary portion ( 22 ) is disposed against the inside of one end ( 11 ) of the pipe shell ( 1 ) to connect the two primary capillary portions ( 20, 21 ) for mutual transmission of the working fluid.

What is claimed is: 
     
         1 . A heat pipe structure, comprising:
 a pipe shell ( 1 ) comprising a pipe body ( 10 ) and two end portions ( 11 ,  11 ′) sealing two ends of the pipe shell ( 1 ), wherein the pipe body ( 10 ) has a hollow vapor channel ( 100 ) along a longitudinal direction thereof and sealing a working fluid; and   a capillary tissue ( 2 ) disposed in the pipe shell ( 1 ) and having two strip-shaped primary capillary portions ( 20 ,  21 ) passing through the vapor channel ( 100 ) and a connecting capillary portion ( 22 ) connecting the two primary capillary portions ( 20 ,  21 ) to continuously form a long strip portion,   wherein the two primary capillary portions ( 20 ,  21 ) extend along a longitudinal direction of the pipe shell ( 1 ) and are immediately adjacent to respective side walls ( 103 ) of the pipe body ( 10 ) along a longitudinal direction thereof, wherein the connecting capillary portion ( 22 ) is disposed against the inside of an end portion ( 11 ) of the pipe shell ( 1 ) to connect the two primary capillary portions ( 20 ,  21 ) for mutual transmission of the working fluid.   
     
     
         2 . The heat pipe structure according to  claim 1 , wherein the pipe shell ( 1 ) has a flat cross-section. 
     
     
         3 . The heat pipe structure according to  claim 1 , wherein the pipe shell ( 1 ) has an outer thickness below 0.6 mm. 
     
     
         4 . The heat pipe structure according to  claim 1 , wherein the capillary tissue ( 2 ) is woven from sintered powder, fiber, or metal wires, or is a continuous long strip formed by twisting a metal net. 
     
     
         5 . The heat pipe structure according to  claim 1 , wherein the connecting capillary portion ( 22 ) of the capillary tissue ( 2 ) is between the two primary capillary portions ( 20 ,  21 ) and bent into a straight shape or an arc shape and disposed in the pipe shell ( 1 ) along a transverse direction thereof. 
     
     
         6 . The heat pipe structure according to  claim 1 , wherein the two primary capillary portions ( 20 ,  21 ) of the capillary tissue ( 2 ) extend toward the other end portion ( 11 ′) and further extend toward each other to form respective secondary capillary portions ( 200 ,  210 ). 
     
     
         7 . The heat pipe structure according to  claim 6 , wherein each of the secondary capillary portions ( 200 ,  210 ) has an arc shape. 
     
     
         8 . The heat pipe structure according to  claim 6 , wherein the secondary capillary portions ( 200 ,  210 ) extend toward each other and further extend along the longitudinal direction of the pipe shell ( 1 ) to form respective rear segments ( 201 ,  211 ). 
     
     
         9 . The heat pipe structure according to  claim 8 , wherein the rear segments ( 201 ,  211 ) are spaced to each other or disposed in contact with each other and in parallel. 
     
     
         10 . The heat pipe structure according to  claim 9 , wherein the rear segments ( 201 ,  211 ) has identical or different lengths. 
     
     
         11 . The heat pipe structure according to  claim 8 , wherein the rear segments ( 201 ,  211 ) extend from the respective secondary capillary portions ( 200 ,  210 ) toward the longitudinal direction of the pipe shell ( 1 ) and are disposed first in contact with each other and then spaced. 
     
     
         12 . The heat pipe structure according to  claim 1 , wherein one of the two primary capillary portions ( 20 ,  21 ) of the capillary tissue ( 2 ) extends toward the other end portion ( 11 ′) of the pipe shell ( 1 ), wherein the other end portion ( 11 ′) extends to form a secondary capillary portion ( 200 ), from which a rear segment ( 201 ) extends. 
     
     
         13 . The heat pipe structure according to  claim 12 , wherein the rear segment ( 201 ) contacts with the other one of the two primary capillary portions ( 20 ,  21 ). 
     
     
         14 . The heat pipe structure according to  claim 12 , wherein the rear segment ( 201 ) extends along the longitudinal direction of the pipe shell ( 1 ) and is spaced from the other one of the two primary capillary portions ( 20 ,  21 ). 
     
     
         15 . The heat pipe structure according to  claim 14 , wherein the other one of the two primary capillary portions ( 20 ,  21 ) extends toward the other end portion ( 11 ′) and further extends to form another secondary capillary portion ( 210 ) to contact with the rear segment ( 201 ).