Patent ID: 7527085

Claim:
An electronic component cooling apparatus comprising: a heat sink having an electronic component mounting surface on which an electronic component to be cooled is mounted, a coolant inlet and a coolant outlet, and a coolant path in which a liquid as a coolant flows to forcibly cool the electronic component mounting surface; a radiator having a coolant inlet and a coolant outlet and a liquid path in which the coolant flows, the liquid path being air-cooled to cool the coolant; an electric fan mounted on a heat-radiating portion of the radiator to generate a cooling air flow by a rotation of an impeller having a plurality of blades in order to cool the heat-radiating portion of the radiator; and an electric pump to supply a moving energy to the coolant so that the coolant coming out of the coolant outlet of the radiator to the coolant inlet of the heat sink and to supply the coolant from the coolant outlet of the heat sink to the coolant inlet of the radiator; wherein the heat-radiating portion of the radiator has an impeller-facing area facing the impeller and a non-impeller-facing area which is different from the impeller-facing area and does not face the impeller; wherein the electric pump is arranged at a position opposing the non-impeller-facing area; wherein the electric fan has a housing which comprises a motor driving the impeller, a venturi having at one end thereof a suction port opposite to the impeller-facing area of the heat-radiating portion of the radiator and a discharge port at the other end, and a duct-forming wall portion formed contiguous to the venturi to lead air coming out of the non-impeller-facing area of the heat-radiating portion to the suction port; wherein the duct-forming wall portion is formed with an opening to expose a heat generating portion of the electric pump; and wherein the casing of the electric pump exposed from the opening is formed with a plurality of heat dissipating through-holes to dissipate to the outside heat generated by the heat-generating portion of a drive motor installed in the electric pump.