Heatsink apparatus

Abstract

A heatsink apparatus has a radiator and a centrifugal pump in a closed circulation channel for circulating a coolant, wherein the centrifugal pump contacting a heat-generating component dissipates heat from the heat-generating component through heat exchange with the coolant. The centrifugal pump includes: a lower casing provided with a contact surface that contacts the heat-generating component; an upper casing; a ring-shaped sealing member provided between the lower and upper casings so as to form a round heat transfer chamber between the ring-shaped sealing member and the lower casing and to form a pump chamber that houses an impeller between the ring-shaped sealing member and the upper casing; a guiding member provided protruding on the lower casing to make the round heat transfer chamber a circulation channel; and the round heat transfer chamber connecting to a through-hole formed in a central portion of the ring-shaped sealing member.

1 . A heatsink apparatus having a radiator and a centrifugal pump in a closed circulation channel for circulating a coolant, the centrifugal pump contacting a heat-generating component and releasing heat from the heat-generating component through heat exchange of the coolant thereinside, the radiator dissipating the heat, the centrifugal pump comprising: 
 a first casing provided with a contact surface that contacts the heat-generating component;    a second casing fitted to be first casing so as to form a space wherein the coolant flows;    a partition wall member provided between the first and second casings so as to form a heat transfer chamber between the partition wall member and the first casing and to form a pump chamber that houses an impeller between the partition wall member and the second casing;    a coolant inlet connected to the heat transfer chamber;    a coolant outlet connected to the pump chamber; and    the heat transfer chamber connected to the pump chamber through a through-hole formed in a central portion of the partition wall member.    
   
   
       2 . The heatsink apparatus according to  claim 1 , further comprising a guiding member provided between the first casing and the partition wall member of the heat transfer chamber so as to form a flow channel of the coolant.  
   
   
       3 . The heatsink apparatus according to  claim 2 , wherein the guiding member comprises: 
 a C-shaped cylindrical portion that circulates the incoming coolant in the vicinity of the through-hole; and    a linear guiding plate that directs the coolant from an outer peripheral side of the first casing to the through-hole located on an inner side of the first casing.    
   
   
       4 . The heatsink apparatus according to  claim 3 , wherein a plurality of heat-dissipating fins are provided in the heat transfer chamber on a surface opposite to the contact surface, protruding from the first casing toward the partition wall member.  
   
   
       5 . The heatsink apparatus according to  claim 1 , wherein the partition wall member is slanted so that a distance between the first casing and the partition wall member in the heat transfer chamber is shorter in a central portion of the heat transfer chamber.  
   
   
       6 . A heatsink apparatus having a radiator and a centrifugal pump in a closed circulation channel for circulating a coolant, the centrifugal pump contacting a heat-generating component and releasing heat from the heat-generating component through heat exchange of the coolant thereinside, the radiator dissipating the heat, the centrifugal pump comprising: 
 a first casing provided with a contact surface that contacts the heat-generating component;    a second casing fitted to the first casing so as to form a space wherein the coolant flows;    a partition wall member provided between the first and second casings so as to form a heat transfer chamber between the partition wall member and the first casing and to form a pump chamber that houses an impeller between partition wall member and the second casing;    a coolant inlet connected to the heat transfer chamber;    a coolant outlet connected to the pump chamber;    through-holes formed in the partition wall member so as to connect the heat transfer chamber and the pump chamber; and    a pair of guiding plates provided in the heat transfer chamber so as to direct the coolant from the inlet to a central portion of the heat transfer chamber.    
   
   
       7 . The heatsink apparatus according to  claim 6 , wherein the though-holes in the partition wall member are disposed outside the pair of guiding plates.  
   
   
       8 . The heatsink apparatus according to  claim 6 , wherein the guiding plates extend from the inlet of the heat transfer chamber beyond the center of the heat transfer chamber.  
   
   
       9 . The heatsink apparatus according to  claim 6 , wherein a flow separation wall is provided in the heat transfer chamber so as to separate the coolant passing through the guiding plates into two directions in the heat transfer chamber.  
   
   
       10 . The heatsink apparatus according to  claim 6 , wherein the though holes in the partition wall member are disposed in two locations outside the pair of guiding plates.  
   
   
       11 . The heatsink apparatus according to  claim 6 , wherein a plurality of heat-dissipating fins are provided in the heat transfer chamber on a surface opposite to the contact surface, protruding from the first casing toward the partition wall member.