Refrigerant compressor

A refrigerant compressor for forming a refrigerant circulation circuit with an external refrigerant circuit comprising:

• a housing having a plurality of housing components joined together;
• a compression mechanism provided in the housing, which draws refrigerant gas from the external refrigerant circuit for compression and discharges the compressed refrigerant gas thereto;
• and
• an oil separation structure provided on a discharge path of the refrigerant gas flowing from the compression mechanism toward the external refrigerant circuit for separating oil contained in the refrigerant gas, the oil separation structure comprising:
• a plurality of separation chambers for centrifugally separating the oil from the refrigerant gas;
• an oil storage chamber for storing the oil separated in the plurality of separation chambers;
• wherein the plurality of separation chambers and the oil storage chamber are recessed within thickness of a circumferential wall of one of the housing components so as to be juxtaposed in a transverse direction passing across the housing component;
• a connection passage connecting the plurality of separation chambers, the connection passage extending in the transverse direction along the refrigerant gas flow in the discharge path;
• and
• an oil passage connecting the oil storage chamber and the separation chambers, the oil passage extending in the transverse direction.