COMPRESSOR

WIPO Patent Application WO/2021/214907

A1

This compressor includes a closed container, an electric motor unit, a crankshaft, and a compression mechanism unit. The crankshaft has a main shaft part and an eccentric shaft part. The eccentric shaft part is formed with a plurality of lightening parts that are lightened in an eccentric axis direction. When the cross-sectional area of the lightening part in a direction perpendicular to the eccentric axis direction is defined as As, the cross-sectional area of the eccentric shaft part in a direction perpendicular to the eccentric axis direction is defined as Bs, "a gas load of a refrigerant having a smaller gas load than R32"/"a gas load of R32" is defined as a gas load ratio C, the cross-sectional secondary moment of the eccentric shaft part in a gas load direction in a case where the lightening part is provided is defined as I, and the cross-sectional secondary moment of the eccentric shaft part in the gas load direction in a case where there is no lightening part is defined as I', the dimensions of respective components are determined to satisfy expression (1) and expression (2). 0