Heat conduction pipe

Abstract

A heat conduction pipe includes an outer pipe ( 10 ), a plurality of inner pipes ( 20 ), and a pair of plugs ( 30 ). The outer pipe is made of a material having great heat conductivity, and defines a pair of openings in respective opposite ends thereof. Each inner pipe is a sealed vacuum pipe made of a material having great heat conductivity, and contains liquid work medium having great heat conductivity. The inner pipes are received in the outer pipe. The plugs seal the openings of the outer pipe and engage with the inner pipes. Liquid work medium having great heat conductivity is movably accommodated in the outer pipe.

What is claimed is:  
     
         1 . A heat conduction pipe comprising: 
 an outer pipe defining an opening at an end thereof, the outer pipe being made of a material having great heat conductivity;    an inner pipe received in the outer pipe, the inner pipe being a vacuum pipe made of a material having great heat conductivity; and    a plug sealing the opening of the outer pipe and engaging with the inner pipe.    
     
     
         2 . The heat conduction pipe as claimed in  claim 1 , wherein the outer pipe comprises a first vaporizing end and a first condensation end.  
     
     
         3 . The heat conduction pipe as claimed in  claim 2 , wherein the inner pipe comprises a second vaporizing end corresponding to the first vaporizing end, and a second condensation end corresponding to the first condensation end.  
     
     
         4 . The heat conduction pipe as claimed in  claim 1 , wherein work medium having great heat conductivity is movably accommodated in the outer pipe, and wherein the second vaporizing end of the inner pipe is submerged in the work medium of the outer pipe.  
     
     
         5 . The heat conduction pipe as claimed in  claim 1 , wherein the outer pipe defines a pair of openings at respective opposite ends thereof.  
     
     
         6 . The heat conduction pipe as claimed in  claim 1 , wherein the plug defines a cavity engagingly receiving an end of the inner pipe so that the inner pipe is positioned in the outer pipe.  
     
     
         7 . A heat dissipation assembly comprising: 
 a heat generating device;    a plurality of heat sink fins; and    a heat conduction pipe extended through the heat sink fins, the heat conduction pipe comprising an outer pipe and a plurality of inner pipes parallel to and received in the outer pipe, the outer and inner heat pipes each containing work medium having great heat conductivity, an end of the outer pipe being in thermal contact with the heat generating device.    
     
     
         8 . The heat dissipation assembly as claimed in  claim 7 , wherein each of the inner pipes is a vacuum pipe.  
     
     
         9 . The heat dissipation assembly as claimed in  claim 7 , wherein the heat sink fins are parallel to the heat generating electronic device.  
     
     
         10 . The heat dissipation assembly as claimed in  claim 7 , wherein the heat conduction pipe extends perpendicularly through the heat sink fins.  
     
     
         11 . The heat dissipation assembly as claimed in  claim 7 , wherein ends of the inner pipes corresponding to said end of the outer pipe are submerged in the work medium of the outer pipe.  
     
     
         12 . A heat conduction pipe apparatus comprising: 
 an outer pipe having a larger diameter and defining opposite first vaporizing and first condensing ends;    a plurality of inner pipes evenly dispensed in said outer pipe each having a smaller diameter and defining opposite second vaporizing and second condensing ends corresponding to said first vaporizing and first condensing ends;    sealing caps secured to ends of the outer pipe and ends of the inner pipes; and    work medium filled between an interior of the outer pipe and an exterior of the inner pipe, and within an interior of the inner pipe.