Cooling device

A cooling device comprising:

• a cooling plate, mounted on a heat-generating electronic component and configured such that a cooling medium can flow through the cooling plate as a cooling liquid for cooling the heat-generating electronic component;
• a radiator, configured to cool the cooling medium heated by the cooling plate and comprising a plurality of cooling pipes, a plurality of heat radiation fins and a tank chamber, wherein the cooling medium can flow within the plurality of cooling pipes, the plurality of heat radiation fins are connected to outer peripheral surfaces of the cooling pipes, and ends of the plurality of cooling pipes are connected to the tank chamber;
• and
• a centrifugal pump, disposed to circulate the cooling medium between the cooling plate and the radiator and comprising a motor, an impeller and a case body, wherein the motor is provided with a rotor and a stator, wherein the impeller is fixed to the rotor and rotated by the power of the motor, and wherein a suction port and a discharge port are formed in the case body for suctioning and discharging the cooling medium,
• wherein the motor is configured such that a rotation center shaft serves as a rotation center of the rotor and the impeller,
• wherein the case body includes a cylindrical portion formed in a cylindrical shape and a bottom portion configured to close one end of the cylindrical portion,
• wherein an axial direction of the cylindrical portion coincides with the axial direction of the rotation center shaft,
• wherein an end of the rotation center shaft supported via a shaft holder formed in the case body and connected to the bottom portion,
• wherein the bottom portion of the case body is configured to suction the cooling medium suctioned from the suction port via a through-hole formed at the bottom portion,
• wherein the centrifugal pump is fixed to the tank chamber and the tank chamber is located between the centrifugal pump and the radiator such that a bottom surface of the bottom portion faces a side surface of the tank chamber,
• wherein the cooling device further comprises an annular seal member disposed between the case body and the tank chamber and configured to surround the through-hole in order to prevent leakage of the cooling medium from a space between the centrifugal pump and the tank chamber, and
• wherein the case body is configured such that an inner peripheral surface of the cylindrical portion is connected to a surface of the bottom portion and the inner peripheral surface of the cylindrical portion is overlapped with the annular seal member in the axial direction of the rotation center shaft.