Cylindrical heat pipes

Abstract

A cylindrical heat pipe. The heat pipe includes a hollow body, a cover, and a tube. The hollow body includes a sealed bottom, a top portion and an inner wall. The cover includes an elevated portion near the top portion. The tube penetrates the cover. The cover seals the hollow body and guides working fluid passing therethrough into the heat pipe. After working fluid is added and vacuums, the tube is sealed, thus the elevated portion enlarges heat-dissipation region of the heat pipe.

1 . A heat pipe, comprising: 
 a hollow body, comprising a sealed bottom, a top portion and an inner wall, wherein the inner wall connects the sealed bottom and the top portion;    a cover comprising an elevated portion near the top portion; and    a tube, penetrating the cover;    wherein the cover seals the hollow body, after a working fluid is added through the tube, the tube is sealed, and the elevated portion enlarges the heat-dissipation region of the heat pipe.    
     
     
         2 . The heat pipe as claimed in  claim 1 , wherein the inner wall comprises a stepped portion for fixing and supporting the cover.  
     
     
         3 . The heat pipe as claimed in  claim 1 , wherein the inner wall comprises at least one protrusion for fixing and supporting the cover.  
     
     
         4 . The heat pipe as claimed in  claim 1 , wherein the inner wall comprises a flange for fixing and supporting the cover.  
     
     
         5 . The heat pipe as claimed in  claim 1 , further comprising a sealant, disposed between the cover and the top portion.  
     
     
         6 . The heat pipe as claimed in  claim 1 , wherein the cover and the hollow body comprise the same material.  
     
     
         7 . The heat pipe as claimed in  claim 6 , wherein the cover and the hollow body comprise plastic, metal, alloy, non-metal or a combination thereof.  
     
     
         8 . The heat pipe as claimed in  claim 1 , wherein the bottom and the hollow body are integrally formed.  
     
     
         9 . The heat pipe as claimed in  claim 8 , wherein the bottom and the hollow body are formed by forging.  
     
     
         10 . A heat pipe, comprising: 
 a hollow body, comprising a sealed bottom, a top portion and an inner wall, wherein the inner wall connects the sealed bottom and the top portion; and    a cover, disposed near the top portion and comprising a center with an opening defined therein;    wherein the cover seals the hollow body, after a working fluid is added through the opening of the cover, and the opening is sealed.    
     
     
         11 . The heat pipe as claimed in  claim 10 , wherein the inner wall comprises a stepped portion for fixing and supporting the cover.  
     
     
         12 . The heat pipe as claimed in  claim 10 , wherein the inner wall comprises at least one protrusion for fixing and supporting the cover.  
     
     
         13 . The heat pipe as claimed in  claim 10 , wherein the inner wall comprises a flange for fixing and supporting the cover.  
     
     
         14 . The heat pipe as claimed in  claim 10 , wherein the opening is sealed by a block.  
     
     
         15 . The heat pipe as claimed in  claim 10 , wherein the opening is sealed by welding, soldering, or brazing.  
     
     
         16 . The heat pipe as claimed in  claim 10 , wherein the opening is sealed by an adhesive.  
     
     
         17 . The heat pipe as claimed in  claim 10 , further comprising a sealant, disposed between the cover and the top portion.  
     
     
         18 . The heat pipe as claimed in  claim 10 , wherein the cover and the hollow body comprise the same material, and the material comprises plastic, metal, alloy, non-alloy or a combination thereof.  
     
     
         19 . The heat pipe as claimed in  claim 10 , wherein the bottom and the hollow body are integrally formed.  
     
     
         20 . The heat pipe as claimed in  claim 19 , wherein the bottom and the hollow body are formed by forging.