Heat pipe with unequal cross-sections

Abstract

The heat pipe of the invention includes an evaporation section and two condensation sections. The evaporation section is located at a part of the heat pipe. The two condensation sections are separately located at two opposite sides of the evaporation section. The evaporation section and the two condensation sections communicate with each other, and a peripheral size of the evaporation section is larger than that of each of the condensation sections.

1 . A heat pipe comprising:
 an evaporation section located at a part of the heat pipe; and   two condensation sections separately located at two opposite sides of the evaporation section;   wherein the evaporation section and the two condensation sections communicate with each other, and a peripheral size of the evaporation section is larger than that of each of the condensation sections.   
     
     
         2 . The heat pipe of  claim 1 , wherein the heat pipe is made of metal. 
     
     
         3 . The heat pipe of  claim 1 , wherein the heat pipe is a straight tube with a circular cross-section. 
     
     
         4 . The heat pipe of  claim 1 , wherein the heat pipe is a straight tube with a flat cross-section. 
     
     
         5 . The heat pipe of  claim 1 , wherein the evaporation section is circular, semicircular or flat in shape. 
     
     
         6 . The heat pipe of  claim 5 , wherein each of the condensation sections is circular or flat in shape. 
     
     
         7 . The heat pipe of  claim 1 , further comprising a first capillary structure disposed in the evaporation section and the condensation sections. 
     
     
         8 . The heat pipe of  claim 7 , further comprising a second capillary structure disposed in each of the condensation sections and covering the first capillary structure. 
     
     
         9 . The heat pipe of  claim 8 , further comprising a working fluid filled in the heat pipe. 
     
     
         10 . A heat sink comprising:
 a heat pipe comprising:   an evaporation section located at a part of the heat pipe; and   two condensation sections separately located at and bendingly extending from two opposite sides of the evaporation section;   wherein the evaporation section and the two condensation sections communicate with each other, and a peripheral size of the evaporation section is larger than that of each of the condensation sections; and   a fin set disposed on at least one of the condensation sections.   
     
     
         11 . The heat sink of  claim 10 , wherein the heat pipe is made of metal. 
     
     
         12 . The heat sink of  claim 10 , wherein the heat pipe is a straight tube with a circular cross-section. 
     
     
         13 . The heat sink of  claim 10 , wherein the heat pipe is a straight tube with a flat cross-section. 
     
     
         14 . The heat sink of  claim 10 , wherein the evaporation section is circular, semicircular or flat in shape. 
     
     
         15 . The heat sink of  claim 14 , wherein each of the condensation sections is circular or flat in shape. 
     
     
         16 . The heat sink of  claim 10 , further comprising a first capillary structure disposed in the evaporation section and the condensation sections. 
     
     
         17 . The heat sink of  claim 16 , further comprising a second capillary structure disposed in each of the condensation sections and covering the first capillary structure. 
     
     
         18 . The heat sink of  claim 17 , further comprising a working fluid filled in the heat pipe. 
     
     
         19 . The heat sink of  claim 10 , further comprising a fan disposed on one side of the fin set.