Flat loop heat pipe

Abstract

A flat loop heat pipe includes an evaporator that vaporizes a working fluid, a condenser that liquefies the working fluid vaporized by the evaporator, a vapor pipe that connects the evaporator to the condenser, and a liquid pipe that connects the condenser to the evaporator. The liquid pipe includes a first wick. The condenser includes a flow passage and a second wick. The flow passage connects the vapor pipe and the liquid pipe. The second wick is connected to the first wick. The second wick is exposed in the flow passage and extends from the flow passage in a planar direction.

1 .- 8 . (canceled) 
     
     
         9 . A flat loop heat pipe, comprising:
 an evaporator that vaporizes a working fluid;   a condenser that liquefies the working fluid vaporized by the evaporator;   a vapor pipe that connects the evaporator to the condenser; and   a liquid pipe that connects the condenser to the evaporator and includes a first wick, wherein the condenser includes
 a flow passage that connects the vapor pipe and the liquid pipe, and 
 a second wick connected to the first wick, wherein the second wick is exposed in the flow passage and extends from the flow passage in a planar direction of the flat loop heat pipe, 
   the evaporator, the vapor pipe, the condenser, and the liquid pipe are formed by two outermost metal layers and a plurality of intermediate metal layers stacked between the two outermost metal layers,   the second wick includes a plurality of through holes formed in adjacent intermediate metal layers of the plurality of intermediate metal layers, and   the plurality of through holes partially overlap with each other between the adjacent intermediate metal layers.   
     
     
         10 . The flat loop heat pipe according to  claim 9 , wherein the second wick is exposed in the flow passage along a direction in which the flow passage extends from the vapor pipe to the liquid pipe. 
     
     
         11 . The flat loop heat pipe according to  claim 9 , wherein the condenser is bent at a position of the second wick. 
     
     
         12 . The flat loop heat pipe according to  claim 9 , wherein
 the vapor pipe includes a first wall and a second wall, the second wall being spaced apart from and facing the first wall,   the liquid pipe includes a third wall and a fourth wall, the fourth wall being spaced apart from and facing the third wall,   the condenser includes
 a fifth wall connecting the first wall of the vapor pipe and the third wall of the liquid pipe, 
 a sixth wall extending from the second wall of the vapor pipe, 
 a seventh wall extending from the fourth wall of the liquid pipe, and 
 an eighth wall spaced apart from and facing the fifth wall, the eighth wall connecting the sixth wall and the seventh wall, and 
   the second wick is formed integrally with the sixth wall, the seventh wall, and the eighth wall.   
     
     
         13 . The flat loop heat pipe according to  claim 12 , wherein
 the second wick includes an end portion spaced apart from and facing the fifth wall,   the flow passage of the condenser is defined by the end portion of the second wick and the fifth wall of the condenser and is formed along the fifth wall of the condenser, and   the fifth wall of the condenser is free from the first wick and the second wick.