Heat sink, liquid cooling unit, and electronic apparatus

Abstract

A heat sink for absorbing heat which is generated by an electronic module by a coolant which flows through its internal portion, provided with a first heat sink part which is contiguous with the electronic module, a second heat sink part which is contiguous with the electronic module, and a heat discharger which is arranged spaced from the first heat sink part and second heat sink part at an opposite side from the electronic module and which is arranged in a flow path between the first heat sink part and second heat sink part.

What is claimed is: 
     
         1 . A heat sink for absorbing heat generated by an electronic module by a coolant flowing through its internal portion, comprising:
 a first heat sink part which is contiguous with said electronic module;   a second heat sink part which is contiguous with said electronic module; and   a heat discharger which is arranged spaced from the first heat sink part and second heat sink part at an opposite side from said electronic module and which is arranged in a flow path between the first heat sink part and second heat sink part.   
     
     
         2 . The heat sink according to  claim 1 , comprising a plurality of said heat dischargers. 
     
     
         3 . The heat sink according to  claim 1 , wherein the surface with the largest area in the surfaces of the heat discharger is slanted with respect to the surface with the largest area in the surfaces of said first heat sink part. 
     
     
         4 . The heat sink according to  claim 1 , further comprising fins between said first heat sink part and said heat discharger and/or between said second heat sink part and said heat discharger. 
     
     
         5 . The heat sink according to  claim 1 , further comprising
 a third heat sink part which is arranged aligned with said first heat sink part and second heat sink part and which is contiguous with said electronic module and   an additional heat discharger which is arranged spaced apart from said first heat sink part and said third heat sink part at an opposite side from said electronic module and which is arranged in a flow path between the first heat sink part and third heat sink part.   
     
     
         6 . A liquid cooling unit comprising
 a heat sink for absorbing heat which is generated by an electronic module by a coolant flowing through its internal portion,   a heat exchanger of the coolant, and   a pump which circulates said coolant, wherein   said heat sink comprising   a first heat sink part which is contiguous with said electronic module,   a second heat sink part which is contiguous with said electronic module, and   a heat discharger which is arranged spaced from the first heat sink part and second heat sink part at an opposite side from said electronic module and which is arranged in a flow path between the first heat sink part and second heat sink part.   
     
     
         7 . An electronic apparatus comprising
 an electronic module which generates heat,   a heat sink for absorbing heat which is generated by said electronic module by a coolant which flows through its internal portion, and   a pump which circulates said coolant, wherein   said heat sink is comprised of   a first heat sink part which is contiguous with said electronic module,   a second heat sink part which is contiguous with said electronic module, and   a heat discharger which is arranged spaced from the first heat sink part and second heat sink part at an opposite side from said electronic module and which is arranged in a flow path between the first heat sink part and second heat sink part.