Loop heat pipe structure

Abstract

A loop heat pipe structure includes an evaporator internally defining a vaporization chamber, in which a first wick structure is provided and a working fluid is filled; at least one vapor pipe having a first end and a second end, and the first end being communicable with an end of the evaporator; and at least one liquid pipe having a third end and a fourth end, the third end being communicable with the second end of the at least one vapor pipe and forming a condensing section, and the fourth end being communicable with another end of the evaporator. The evaporator, the at least one vapor pipe and the at least one liquid pipe together form a loop for the working fluid; and a grand total cross sectional area of the at least one vapor pipe is larger than that of the at least one liquid pipe.

What is claimed is: 
     
         1 . A loop heat pipe structure, comprising:
 an evaporator internally defining a vaporization chamber, in which a first wick structure is provided and a working fluid is filled;   at least one vapor pipe having a first end and a second end, and the first end being communicable with an end of the evaporator; and   at least one liquid pipe having a third end and a fourth end, the third end being communicable with the second end of the at least one vapor pipe and forming a condensing section, and the fourth end being communicable with another end of the evaporator; and   the evaporator, the at least one vapor pipe and the at least one liquid pipe together forming a loop for the working fluid; and a grand total cross sectional area of the at least one vapor pipe being larger than a grand total cross sectional area of the at least one liquid pipe.   
     
     
         2 . The loop heat pipe structure as claimed in  claim 1 , wherein at least one of the first end and/or the second end of the at least one vapor pipe is formed of a plurality of communicating pipes. 
     
     
         3 . The loop heat pipe structure as claimed in  claim 1 , wherein the condensing section is diametrically expanded and internally defines a condensation chamber, which has an end communicable with the second end of the at least one vapor pipe and another end communicable with the third end of the at least one liquid pipe. 
     
     
         4 . The loop heat pipe structure as claimed in  claim 1 , wherein the condensing section consists of a plurality of condensing pipes; and each of the condensing pipes having an end communicable with the second end of the at least one vapor pipe and another end communicable with the third end of the at least one liquid pipe. 
     
     
         5 . The loop heat pipe structure as claimed in  claim 1 , wherein the at least one liquid pipe is internally provided with a second wick structure. 
     
     
         6 . The loop heat pipe structure as claimed in  claim 5 , wherein the condensing section is internally provided with a third wick structure, and the third wick structure being capillarily connected to the second wick structure. 
     
     
         7 . The loop heat pipe structure as claimed in  claim 1 , wherein the condensing section is externally provided with a radiation fin assembly. 
     
     
         8 . The loop heat pipe structure as claimed in  claim 1 , wherein the first wick structure separates the vaporization chamber into a liquid chamber and a vapor chamber; the liquid chamber being located adjacent to the fourth end of the at least one liquid pipe and storing the working fluid that is in a liquid phase, and the vapor chamber being located adjacent to the first end of the at least one vapor pipe and allowing the working fluid in a gas phase to flow therethrough; and the first wick structure including a plurality of grooves, via which the gas-phase working fluid flowing to the vapor chamber. 
     
     
         9 . The loop heat pipe structure as claimed in  claim 3 , wherein the at least one liquid pipe is internally provided with a second wick structure. 
     
     
         10 . The loop heat pipe structure as claimed in  claim 9 , wherein the condensing section is internally provided with a third wick structure, and the third wick structure being capillarily connected to the second wick structure. 
     
     
         11 . The loop heat pipe structure as claimed in  claim 4 , wherein the at least one liquid pipe is internally provided with a second wick structure. 
     
     
         12 . The loop heat pipe structure as claimed in  claim 11 , wherein the condensing section is internally provided with a third wick structure, and the third wick structure being capillarily connected to the second wick structure. 
     
     
         13 . The loop heat pipe structure as claimed in  claim 3 , wherein the condensing section is externally provided with a radiation fin assembly. 
     
     
         14 . The loop heat pipe structure as claimed in  claim 4 , wherein the condensing section is externally provided with a radiation fin assembly.