Boiling cooler

Abstract

A boiling cooler includes a refrigerant vessel for reserving refrigerant and a heat radiation unit. A heat-generating member is attached to an outer surface of one of two opposite walls of the refrigerant vessel. The heat radiation unit is mounted at an outer surface of other of the walls. A first wick arranged at an inner surface of the one of the walls extends from a lower portion of the wall to an arrangement position of the heat-generating member when the walls are vertically positioned. Refrigerant boiled and vaporized by the heat-generating member enters the heat radiation unit to be condensed and liquidated, then returning to the refrigerant vessel. The heat-generating member can be effectively cooled regardless of the position of the heat-generating member with respect to the refrigerant vessel, in the cases where the refrigerant vessel is used in the vertical direction and in a horizontal direction.

1 . A boiling cooler comprising: 
 a refrigerant vessel, in which refrigerant is reserved, the refrigerant vessel having two opposite walls, a heat-generating member being attached to an outer surface of one of the walls; and    a heat radiation unit, into which refrigerant boiled and vaporized by the heat-generating member flows to be condensed and liquidized and then returns to the refrigerant vessel, the heat radiation unit being arranged at an outer surface of other of the walls, characterized by comprising    a first wick arranged at an inner surface of the one of the walls, the first wick extending from a lower portion of the wall to a part thereof corresponding to an arrangement position of the heat-generating member when the walls are used to be positioned in an up-down direction.    
   
   
       2 . The boiling cooler according to  claim 1 , characterized in that 
 the heat radiation unit includes a pair of headers and at least one tube, each of the headers being arranged substantially perpendicularly to the other of the walls and communicating with the refrigerant vessel at one end of the header, the tube being arranged between the headers to be substantially parallel to the walls and communicating with the headers.    
   
   
       3 . The boiling cooler according to  claim 1 , characterized in that 
 the heat radiation unit includes a plurality of tubes and a communication header, each of the tubes being arranged substantially perpendicularly to the other of the walls and communicating with the refrigerant vessel at one end of the tube, the communication header being connected with each of the tubes at other end of the tube so that the tubes communicate with each other.    
   
   
       4 . The boiling cooler according to  claim 1 , characterized by comprising a second wick, which is arranged at a lower portion of the refrigerant vessel when the walls are used to be positioned in the up-down direction.  
   
   
       5 . The boiling cooler according to  claim 4 , characterized in that the second wick is constructed of a porous material which is coarser than that of the first wick.  
   
   
       6 . The boiling cooler according to claim  41  characterized in that the first wick and the second wick are integrally formed.  
   
   
       7 . The boiling cooler according to  claim 4 , characterized in that the second wick extends to the part corresponding to the arrangement position of the heat-generating member.  
   
   
       8 . The boiling cooler according to  claim 1 , characterized by comprising a partition wall, which is arranged at an upper side of a refrigerant liquid surface in the refrigerant vessel to partition an interior of the refrigerant vessel into an upper part and a lower part when the walls are used to be positioned in the up-down direction, the first wick penetrating the partition wall.  
   
   
       9 . The boiling cooler according to  claim 2 , characterized by comprising a third wick, which is arranged in one of the headers and extends from an opposite end of the header with respect to the refrigerant vessel to the first wick.  
   
   
       10 . The boiling cooler according to  claim 3 , characterized by comprising a fourth wick, which is arranged in one of the tubes and extends from a side of the communication header to the first wick.