Heat pipe

Abstract

A heat pipe which can prevent frost damage of the pipe body due to freezing of the typical working fluid in cold climates by encapsulating an aqueous solution containing about 0.5 to about 10 wt % glycols as a working fluid, and which has a working performance almost comparable to that of the heat pipe in which water is used as the working fluid.

1 . A heat pipe comprising: 
 encapsulating an aqueous solution containing about 0.5 to about 10 wt % glycols as a working fluid.    
   
   
       2 . A heat pipe according to  claim 1 , 
 wherein the glycols are selected from the group consisting of ethylene glycols, propylene glycols, and butanediol.    
   
   
       3 . A heat pipe according to  claim 1 , 
 wherein water of the aqueous solution is selected from the group consisting of distilled water and deionized water.    
   
   
       4 . A heat pipe according to  claim 2 , 
 wherein water of the aqueous solution is selected from the group consisting of distilled water and deionized water.    
   
   
       5 . A heat pipe according to  claim 1 , 
 encapsulating an aqueous solution containing about 0.7 to about 5 wt % glycols as a working fluid.    
   
   
       6 . A heat pipe according to  claim 1 , 
 encapsulating an aqueous solution containing about 1.0 to about 3 wt % glycols as a working fluid.    
   
   
       7 . A heat pipe according to  claim 1 , wherein the working fluid is encapsulated in a container made of a metallic material selected from the group consisting of copper, copper alloy, aluminum and stainless steel.  
   
   
       8 . A heat pipe according to  claim 1 , 
 wherein the container comprises a heating portion and a heat radiating portion.    
   
   
       9 . A heat pipe according to  claim 8 , 
 wherein a fin or fins are formed on the heat radiating portion.    
   
   
       10 . A heat pipe according to  claim 1 , 
 wherein the inside of the pipe is kept depressurized.    
   
   
       11 . A heat pipe according to  claim 1 , 
 wherein the heat pipe is wickless.    
   
   
       12 . A heat pipe according to  claim 1 , 
 wherein the heat pipe contains a wick.    
   
   
       13 . A heat pipe according to  claim 11 , 
 wherein the heat pipe is selected from the group consisting of a double-pipe type wickless heat pipe and a loop type wickless heat pipe.