MOTOR FAN

摘要

This motor fan (1) is provided with: an impeller (7b) which forms an air current; an electric motor (6) which rotationally drives the impeller (7b); a circular cylindrical casing (16) which covers the outer periphery of the impeller (7b) and through which the air current passes; a shroud (10) which is provided with a base (11) protruding from the periphery of the casing (16); a control unit (40) which controls the rotation of the electric motor (6) and which is installed on the discharge side of the base (11); and a heat sink (50) which radiates heat from heat radiation pins (52), thereby suppressing the heat generation of the control unit (40). In the heat sink (50), the heat radiation pins (52) are exposed to the suction side.