To effectively cool a motor and a thermal load by using a pumped fluid or an external fluid.
A pump 14 comprises a motor 12 fitted in a motor casing 14, and a rotatable pumping member 16 capable of pumping a first fluid when the member is rotated by the motor. A first fluid flow passage A for the first fluid from a high pressure side 16a of the pumping member into the motor casing and to a low pressure side 16b of the pumping member is provided so as to cool the motor. A heat exchanger located between a wall of the motor casing and a thermal load 22 is provided on the pump. A second fluid flow passage B for a second fluid is provided in this heat exchanger to perform the heat exchange between the first and second fluids while the heat exchanger is in operation.
BLACK DAVID
Nobuhiko Nakajima
Ohara Shizuo