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 path 21 that introduces a liquid refrigerant from a refrigerant circuit 5 that includes a compressor 1; and a gas introduction path 20 that introduces a gas refrigerant from the refrigerant circuit 5. The inside of the case 14 has a downstream chamber R2, which is positioned on one axial-direction end side of the rotor 12 and the stator 13 and has the compressor 1 arranged therein, and an upstream chamber R1, which is positioned on the other axial-direction end side and communicates with the downstream chamber R2 via a gap G that is between the outer circumferential part of the rotor 12 and an inner circumferential part of the stator 13. The liquid refrigerant and the gas refrigerant that are introduced are mixed in the upstream chamber R1, and a wet steam that is a mixture of the liquid refrigerant and the gas refrigerant is supplied to at least the gap G.