Flat heat pipe having swirl core

Abstract

A flat heat pipe having a swirl core includes a flat sealed casing having smooth inner walls, a working fluid filled within the flat sealed casing, and a swirl core disposed along a central axis of the flat sealed casing to support upper and lower inner walls of the flat sealed casing. Two airflow channels are formed between the swirl core and left and right inner walls of the flat sealed casing for allowing vapors of the working fluid to flow through. The swirl core is made by winding a metallic woven mesh in at least two circles for allowing the working fluid to flow through. A center of the swirl core is formed with a reflow channel. By this arrangement, the swirl core is used as a wick structure for allowing the working fluid to flow through, thereby saving the cost and time for manufacturing the wick structure.

What is claimed is: 
     
         1 . A flat heat pipe having a swirl core, including:
 a flat sealed casing having smooth inner walls;   a working fluid filled within the flat sealed casing; and   a swirl core disposed along a central axis of the flat sealed casing to support upper and lower inner walls of the flat sealed casing, two airflow channels being formed between the swirl core and left and right inner walls of the flat sealed casing for allowing vapors of the working fluid to flow through, the swirl core being made by winding a metallic woven mesh in at least two circles for allowing the working fluid to flow through, a center of the swirl core being formed with a reflow channel.   
     
     
         2 . The flat heat pipe having a swirl core according to  claim 1 , wherein the flat heat pipe has an evaporating section and a condensing section away from the evaporating section, the vapors of the working fluid flow from the evaporating section to the condensing section through the two airflow channels and the smooth inner walls of the flat sealed casing. 
     
     
         3 . The flat heat pipe having a swirl core according to  claim 2 , wherein a small portion of the vapors of the working fluid flow from the condensing section back to the evaporating section through the reflow channel. 
     
     
         4 . The flat heat pipe having a swirl core according to  claim 3 , wherein a gap is formed between adjacent two circles of the metallic woven mesh. 
     
     
         5 . The flat heat pipe having a swirl core according to  claim 4 , wherein the working fluid flows from the condensing section back to the evaporating section along the swirl core.