Self-regenerating bridge-type heat pipe

Abstract

In order to provide a self-regenerating bridge-type heat pipe capable of effectively transporting heat while maintaining a low filling ratio of a working fluid, in the self-regenerating bridge-type heat pipe made of aluminum in which a working fluid is filled within flow passages which are alternately folded back, inner surfaces of the flow passages are subjected to a water repellent treatment, and the filling ratio of the working fluid is 30 vol. % or less.

1 . A self-regenerating bridge-type heat pipe made of aluminum in which a working fluid is filled within flow passages which are alternately folded back,
 wherein a bridge of the working fluid capable of moving along the flow passages is formed within the flow passages according to an internal pressure of the flow passages, and wherein a filling ratio of the working fluid is 30 vol. % or less.   
     
     
         2 . The self-regenerating bridge-type heat pipe according to  claim 1 , wherein the filling ratio of the working fluid is 5 to 10 vol. %. 
     
     
         3 . The self-regenerating bridge-type heat pipe according to  claim 1 , wherein a cross-sectional area of the flow passages is 0.25 mm 2  or more and 9.0 mm 2  or less. 
     
     
         4 . The self-regenerating bridge-type heat pipe according to  claim 1 , wherein, in a state where the self-regenerating bridge-type heat pipe is made to come into contact with a high temperature section and a low temperature section, a bridge of the working fluid is formed within the flow passages. 
     
     
         5 . (canceled) 
     
     
         6 . The self-regenerating bridge-type heat pipe according to  claim 1 , wherein a distance from one folded-back end to the other folded-back end of the flow passages is 50 mm or more. 
     
     
         7 . The self-regenerating bridge-type heat pipe according to  claim 1 , wherein inner surfaces of the flow passages are subjected to a water repellent treatment. 
     
     
         8 . The self-regenerating bridge-type heat pipe according to  claim 7 , wherein the water repellent treatment is either an aluminum anodizing treatment or a boehmite treatment. 
     
     
         9 . The self-regenerating bridge-type heat pipe according to  claim 1 , wherein the working fluid is water, and the filling ratio of the working fluid is less than 10%.