Heat pipe with ultra-thin capillary structure

Abstract

A heat pipe with an ultra-thin capillary structure includes a tube body which is hollow and flat, and a capillary structure which is in the tube body and is shaped as a thin plate. The capillary structure has an adhering surface attached on a partial portion of an inner wall of the tube body, and a forming surface corresponding to the adhering surface. A vapor channel formed between the forming surface and the inner wall of the tube body; wherein the forming surface further includes an abutting surface elongated along a longitudinal direction of the vapor channel and at least one capillary transmission surface extending from a side of the abutting surface to connect to the adhering surface the steam channel, and the capillary transmission surface is gradually inclined between the adhering surface and the abutting surface.

What is claimed is: 
     
         1 . A heat pipe with an ultra-thin capillary structure, comprising:
 a tube body ( 1 ), being hollow and flat; and   a capillary structure ( 2 ), being in the tube body ( 1 ) and shaped as a thin plate, having an adhering surface ( 20 ) attached on a partial portion of an inner wall of the tube body ( 1 ), and a forming surface ( 21 ) corresponding to the adhering surface ( 20 ), a vapor channel ( 100 ) being formed between the forming surface ( 21 ) and the inner wall of the tube body ( 1 );   wherein the forming surface ( 21 ) further comprises an abutting surface ( 210 ) elongated along a longitudinal direction of the vapor channel ( 100 ), and at least one capillary transmission surface ( 211 ) extending from a side of the abutting surface ( 210 ) to connect to the adhering surface ( 20 ), the capillary transmission surface ( 211 ) being gradually inclined between the adhering surface ( 20 ) and the abutting surface ( 210 ).   
     
     
         2 . The heat pipe with an ultra-thin capillary structure according to  claim 1 , wherein a thickness of the flat tube body ( 1 ) is under 0.5 mm. 
     
     
         3 . The heat pipe with an ultra-thin capillary structure according to  claim 1 , wherein the capillary structure ( 2 ) is made by selecting from a group consisting of knit, fiber and sintered metal powders and their combination. 
     
     
         4 . The heat pipe with an ultra-thin capillary structure according to  claim 1 , wherein a porosity of the forming surface ( 21 ) is gradually reduced as the forming surface ( 21 ) is extended toward the adhering surface ( 20 ). 
     
     
         5 . The heat pipe with an ultra-thin capillary structure according to  claim 1 , wherein two sides of the abutting surface ( 210 ) have two capillary transmission surfaces ( 211 ), respectively. 
     
     
         6 . The heat pipe with an ultra-thin capillary structure according to  claim 5 , wherein the two capillary transmission surfaces ( 211 ) are symmetrical to each other. 
     
     
         7 . The heat pipe with an ultra-thin capillary structure according to  claim 1 , wherein a bare area ( 22 ) is formed at a portion of the capillary structure ( 2 ) by removing corresponding capillary transmission surface. 
     
     
         8 . The heat pipe with an ultra-thin capillary structure according to  claim 1 , wherein the capillary transmission surface ( 211 ) has a plurality of air flow holes ( 220 ) exposing the inner wall of the tube body ( 1 ). 
     
     
         9 . The heat pipe with an ultra-thin capillary structure according to  claim 1 , wherein the capillary transmission surface ( 211 ) has a plurality of cut-outs ( 220 ′) exposing the inner wall of the tube body ( 1 ). 
     
     
         10 . The heat pipe with an ultra-thin capillary structure according to  claim 1 , wherein the capillary structure ( 2 ) has a plurality of grooves ( 101 ) that are radially threaded on the inner wall of the tube body ( 1 ), a depth of the groove ( 101 ) being less than 30% of a thickness of the tube body ( 1 ). 
     
     
         11 . The heat pipe with an ultra-thin capillary structure according to  claim 10 , wherein the depth of the thread ( 101 ) is less than 0.03 mm.