Heat pipe

Abstract

A heat pipe is disclosed in the present invention. The heat pipe includes a first pipe and at least a second pipe. The first pipe is formed with an enclosed space. The second pipe is disposed in the enclosed space. There is no wick structure disposed between the first pipe and the second pipe.

What is claimed is: 
     
         1 . A heat pipe comprising:
 a first pipe formed with an enclosed space; and   at least one second pipe disposed in the enclosed space, no wick structure disposed at an interior of the second pipe;   wherein no wick structure is disposed between the first pipe and the second pipe.   
     
     
         2 . The heat pipe of  claim 1 , wherein the second pipe comprises two ends along an axial direction, and a middle part between the two ends, and a cross-sectional area of one of the two ends is larger than that of the middle part. 
     
     
         3 . The heat pipe of  claim 1 , wherein the second pipe comprises two ends along an axial direction, and a middle part between the two ends, and a cross-sectional area of one of the two ends is smaller than that of the middle part. 
     
     
         4 . A heat pipe comprising:
 a first pipe formed with an enclosed space, no wick structure disposed at an inner sidewall of the first pipe; and   at least one second pipe disposed in the enclosed space, no wick structure disposed at an exterior sidewall of the second pipe.   
     
     
         5 . The heat pipe of  claim 4 , wherein the second pipe comprises two ends along an axial direction, and a middle part between the two ends, and a cross-sectional area of one of the two ends is larger than that of the middle part. 
     
     
         6 . The heat pipe of  claim 4 , wherein the second pipe comprises two ends along an axial direction, and a middle part between the two ends, and a cross-sectional area of one of the two ends is smaller than that of the middle part. 
     
     
         7 . A heat pipe comprising:
 a first pipe formed with an enclosed space and no wick structure disposed at an inner sidewall of the first pipe, a part of sidewall of the first pipe being deformed to define a first section and a second section, the second section comprising a first opening and a second opening, the first opening and the second opening communicated with the first section, respectively.   
     
     
         8 . The heat pipe of  claim 7 , wherein the second section comprises two ends along an axial direction, and a middle part between the two ends, and a cross-sectional area of one of the two ends is larger than that of the middle part. 
     
     
         9 . The heat pipe of  claim 7 , wherein the second section comprises two ends along an axial direction, and a middle part between the two ends, and a cross-section area of one of the two ends is smaller than that of the middle part. 
     
     
         10 . The heat pipe of  claim 7 , wherein a size of the second section is smaller than that of the first section.