Cooling system

Abstract

The maximum radiating value of a radiator ( 5 ) is not more than the maximum heat value of an IGBT ( 3 ). Even if the radiating capacity of the radiator ( 5 ) is not more than the maximum heat value of the IGBT ( 3 ), the temperature of cooling water returned to the heat absorber ( 4 ) can be maintained low and the size of the radiator ( 5 ) can be decreased because the increasing rate of the temperature of the cooling water returned to the heat absorber ( 4 ) is sufficiently smaller than that of the heating element ( 3 ), due to the heat capacity of the fluid, the heat absorber ( 4 ) and the radiator ( 5 ).

1 . A cooling system for cooling a heating element, comprising 
 a heat absorber ( 4 ) which absorbs heat generated by the heating element ( 3 ), and transfers the absorbed heat to cooling fluid;    a radiator ( 5 ) which radiates heat of the fluid, to cool the fluid; and    piping means ( 6 ) which connects the heat absorber ( 4 ) and the radiator ( 5 ), to define a circulation passage through which the fluid circulates, wherein    the maximum radiating value of the radiator ( 5 ) is not more than the maximum heat value of the heating element ( 3 ).    
   
   
       2 . A cooling system according to  claim 1 , further comprising a pump ( 7 ) which forcedly circulates the fluid between the radiator ( 5 ) and the heat absorber ( 4 ).  
   
   
       3 . A cooling system which is applied to a vehicle having an electric motor ( 2 ) which generates a driving power, and which cools an electric circuit ( 3 ) supplying a driving electric current to the electric motor ( 2 ), comprising 
 a heat absorber ( 4 ) which absorbs heat generated by the electric circuit ( 3 ), and transfers the absorbed heat to cooling fluid;    a radiator ( 5 ) which radiates heat of the fluid, to cool the fluid; and    piping means ( 6 ) which connects the heat absorber ( 4 ) and the radiator ( 5 ), to define a circulation passage through which the fluid circulates, wherein    the maximum radiating value of the radiator ( 5 ) is not more than the maximum heat value of the electric circuit ( 3 ).    
   
   
       4 . A cooling system according to  claim 3 , further comprising a pump ( 7 ) which forcedly circulates the fluid between the radiator ( 5 ) and the heat absorber ( 4 ).