Electronic Apparatus Cooling Device

Abstract

A compact, low-cost electronic apparatus cooling device which provides a high heat receiving performance with less transfer of the heat of an exothermic body to a pump. In the device, a heat receiving part has fins in a given area of a plate-like base and the height of the fins is almost equal to the thickness of the base which surrounds them. A pressure member with an opening covers part of the top of the fins and part of the base. Refrigerant flows in from part of the top of the fins in contact with the opening of the pressure member and flow out from part of the top of the fins not covered by the pressure member.

1 . An electronic apparatus cooling device which cools an exothermic body by heat transfer of refrigerant, comprising:
 a heat receiving part including:
 a base for receiving heat generated by the exothermic body; 
 a pressure member with an opening, covering part of the base and being located opposite to the exothermic body; and 
 a flow channel allowing the refrigerant to flow therein; 
   a heat radiator for radiating heat absorbed by the refrigerant; and   a pump for circulating the refrigerant between the heat receiving part and the heat radiator,   wherein in the flow channel of the heat receiving part, the refrigerant flows in through the opening of the pressure member and flow out from the periphery of the pressure member in places other than the opening.   
   
   
       2 . An electronic apparatus cooling device which cools an exothermic body by heat transfer of refrigerant, comprising:
 a heat receiving part including:
 a plate-like base for receiving heat generated by the exothermic body; 
 fins with a height almost equal to the height of the surrounding base, located in an area of the base, opposite to the exothermic body; 
 a pressure member with an opening, covering part of the top of the fins and part of the base; and 
 a flow channel allowing the refrigerant to flow therein; 
   a heat radiator for radiating heat absorbed by the refrigerant; and   a pump for circulating the refrigerant between the heat receiving part and the heat radiator,   wherein in the flow channel of the heat receiving part, the refrigerant flows in from the top of the fins in the opening of the pressure member and flows out from the top of the fins on the periphery of the pressure member in places other than the opening.   
   
   
       3 . The electronic apparatus cooling device according to  claim 2 ,
 wherein the heat receiving part and the pump are integrated by joining them vertically through the pressure member in a water-tight manner; and   wherein the pump includes a first suction port to suck the refrigerant into the pump, a first discharge port to discharge the refrigerant to the outside of the pump, a second suction port to suck in the refrigerant from the heat receiving part, and a second discharge port with an end face opposite to the heat receiving part to discharge the refrigerant to the heat receiving part.   
   
   
       4 . The electronic apparatus cooling device according to  claim 3 , further comprising:
 a partition for partitioning a pump chamber for circulation of refrigerant in the pump,   wherein the first suction port and the second discharge port are located in a first area partitioned by the partition; and   wherein the second suction port and the first discharge port are located in a second area partitioned by the partition.   
   
   
       5 . The electronic apparatus cooling device according to  claim 2 , wherein the pressure member uses a gel sheet which remains flexible in an ambient temperature range in which normal operation of the exothermic body is guaranteed.