Evaporator for loop heat pipe system

Abstract

An evaporator for a loop heat pipe (LHP) system. The evaporator an evaporator body for accommodating a sintered wick formed by sintering metal powders, a discharging hole for discharging a working fluid filled into voids formed between particles of the sintered wick and changed into a vapor due to being heated, and an inlet hole for introducing the working fluid changed into a liquid; a first chamber portion coupled to a side of the inlet hole, and including an inlet for introducing the working fluid in a liquid phase, and an accommodation space portion for accommodating the working fluid in a liquid phase; and a capillary structure that is porous and that is inserted into the accommodating space portion, wherein the working fluid in a liquid phase introduced through the inlet is introduced to the evaporator body through the capillary structure.

1 . An evaporator for a loop heat pipe (LHP) system, the evaporator comprising:
 an evaporator body for accommodating a sintered wick formed by sintering metal powders, a discharging hole for discharging a working fluid filled into voids formed between particles of the sintered wick and changed into a vapor due to being heated, and an inlet hole for introducing the working fluid changed into a liquid;   a first chamber portion coupled to a side of the inlet hole, and comprising an inlet for introducing the working fluid in a liquid phase, and an accommodation space portion for accommodating the working fluid in a liquid phase; and   a capillary structure that is porous and that is inserted into the accommodating space portion,   wherein the working fluid in a liquid phase introduced through the inlet is introduced to the evaporator body through the capillary structure.   
     
     
         2 . The evaporator of  claim 1 , wherein at least a portion of the capillary structure contacts the sintered wick. 
     
     
         3 . The evaporator of  claim 1 , wherein the capillary structure occupies all portions of the accommodation space portion. 
     
     
         4 . The evaporator of  claim 1 , wherein a capillary pressure of the sintered wick is greater than a capillary pressure of the capillary structure. 
     
     
         5 . The evaporator of  claim 1 , wherein a transmittance of the sintered wick is smaller than a transmittance of the capillary structure. 
     
     
         6 . The evaporator of  claim 1 , further comprising a second chamber portion comprising an outlet coupled to the discharging hole, for discharging the working fluid changed into a vapor, and a vapor accommodation portion for accommodating the working fluid changed into a vapor. 
     
     
         7 . The evaporator of  claim 1 , wherein the sintered wick comprises a space portion, and has a rectangular parallelepiped shape with an open surface, and
 wherein an outer surface of the sintered wick is coupled to an inner surface of the sintered wick accommodating portion,   wherein the open surface is connected to the discharging hole.   
     
     
         8 . The evaporator of  claim 1 , wherein the sintered wick has a rectangular parallelepiped shape,
 wherein the sintered wick comprises a plurality of vapor paths for guiding the working fluid changed into a vapor, and   wherein the plurality of vapor paths are connected to the discharging hole, and each has a circular cross section.   
     
     
         9 . The evaporator of  claim 7 , wherein the sintered wick comprises first sub-sintered wicks that connect top and bottom surfaces of the sintered wick and are spaced apart from each other by a predetermined interval. 
     
     
         10 . The evaporator of  claim 7 , wherein the sintered wick comprises protrusions that protrude from top and bottom surface of the sintered wick and are spaced apart from each other by a predetermined interval. 
     
     
         11 . The evaporator of  claim 7 , wherein the sintered wick comprises: plate-type first sub-sintered wicks that connect top and bottom surfaces of the sintered wick and are spaced apart from each other by a predetermined interval; and
 second sub-sintered wicks of a pin type that protrude from the bottom surface of the sintered wick,   wherein the second sub-sintered wicks are disposed between the first sub-sintered wicks and are spaced apart from each other by a predetermined interval.