Loop heat pipe with fluid slug pipe

Abstract

A loop heat pipe with fluid slug pipes includes: an evaporation chamber having a casing and a wick disposed therein; a return line having two ends connected to the casing; and a working fluid filling the evaporation chamber. A condensation segment is defined as a predetermined length of a body of the return line. A vapor segment is defined as a portion of the return line, extending from the condensation segment to the vapor end. A liquid segment is defined as another portion of the return line, extending from the condensation segment to the liquid end. At least one partition element is disposed inside the liquid segment to thereby divide the liquid segment into at least two fluid slug pipes not in communication with each other but in communication with the condensation segment and the casing. The fluid slug pipes each have a smaller diameter than the return line.

What is claimed is: 
     
         1 . A loop heat pipe with fluid slug pipes, comprising:
 an evaporation chamber having a casing and a wick disposed in the casing, the wick not occupying the casing fully so as for a vapor space to be formed between the wick and the casing;   a return line having two ends defined as a vapor end and a liquid end, respectively, the vapor end connecting to the casing and thereby being in communication with the space, and the liquid end connecting to the casing and thereby being in communication with an inside of the casing; and   a working fluid filling the evaporation chamber;   wherein a condensation segment is defined as a predetermined length of a body of the return line, allowing a heat-dissipating unit to be disposed on a surface of the condensation segment, a vapor segment is defined as a portion of the return line, the portion extending from the condensation segment to the vapor end, and a liquid segment is defined as another portion of the return line, the another portion extending from the condensation segment to the liquid end, with at least one partition element disposed in an inside of the liquid segment of the return line to thereby divide the liquid segment of the return line into at least two fluid slug pipes not in communication with each other but in communication with the condensation segment and the casing, wherein the at least two fluid slug pipes each have a smaller diameter than the return line.   
     
     
         2 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the at least one partition element extends from the liquid segment to the condensation segment. 
     
     
         3 . The loop heat pipe with fluid slug pipes according to  claim 2 , wherein the at least one partition element extends to the condensation segment lengthwise fully. 
     
     
         4 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the at least one partition element extends from the liquid segment to the condensation segment and then to the vapor end of the vapor segment. 
     
     
         5 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the return line has two tubes, one of the tubes functions as the liquid segment and the condensation segment, another tube functions as the vapor segment, the vapor segment having a smaller diameter than the liquid segment and the condensation segment, the liquid segment and the condensation segment fit partially around the vapor segment and thereby connect to the vapor segment, thereby achieving internal spatial communication. 
     
     
         6 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the return line has two tubes, one of the tubes functions as the liquid segment and the condensation segment, another tube functions as the vapor segment, the vapor segment fitting partially around the liquid segment and the condensation segment, thereby achieving internal spatial communication. 
     
     
         7 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the at least one partition element is in a plural number to thereby divide the liquid segment of the return line into a plurality of said fluid slug pipes. 
     
     
         8 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein a water storage space is formed between the wick and the casing, adapted to be in communication with the liquid end of the return line, and adapted to be not in communication with the vapor space. 
     
     
         9 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the vapor space has a common room and a plurality of branch rooms separated by a predetermined distance and each adapted to be in communication with the common room. 
     
     
         10 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the wick is made of sintered copper powder. 
     
     
         11 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the fluid slug pipes each have a smaller diameter than the vapor segment of the return line. 
     
     
         12 . The loop heat pipe with fluid slug pipes according to  claim 1 , wherein the at least one partition element and the return line are integrally formed.