COMPRESSOR DRIVING MOTOR AND COOLING METHOD FOR SAME

摘要

[Problem] To provide a compressor driving motor that can be cooled by supplying only the minimum necessary amount of a liquid refrigerant to a gap that is between a rotor and a stator, and to provide a cooling method for the compressor driving motor. [Solution] A compressor driving motor 10 that is provided with: a rotor 12; a stator 13 that surrounds an outer circumferential part of the rotor 12; a case 14 that houses the rotor 12 and the stator 13; a liquid introduction part 22 that introduces a liquid refrigerant to the inside of the case 14 from a refrigerant circuit 5 that includes a compressor 1; a gas introduction part 21 that introduces a gas refrigerant to the inside of the case 14 from the refrigerant circuit 5; and an injector 30 that uses the gas refrigerant introduced by the gas introduction part 21 as a drive fluid and uses the liquid refrigerant introduced by the liquid introduction part 22 as a suction fluid. A wet steam that is a mixture of the liquid refrigerant and the gas refrigerant is injected by the injector 30 at least toward a gap G that is between the outer circumferential part of the rotor 12 and an inner circumferential part of the stator 13.