REFRIGERATION CYCLE DEVICE

摘要

This refrigeration cycle device is provided with the following: a compressor (1); a condenser; an expander (3); and a refrigerant circuit that is connected to an evaporator by a piping in which a refrigerant circulates. The expander (3) includes the following: an expander shell (34) that constitutes an outer shell; an expansion part (31) that is disposed inside the expander shell (34), expands refrigerant which flowed out from the condenser to generate drive force, and causes the expanded refrigerant to flow into the evaporator; and a power generator (32) that is disposed inside the expander shell (34) and that is rotated by the drive force of the expansion part (31). The expander shell (34) has formed therein an inlet (41) for the inflow of the refrigerant and an outlet (42) for causing the refrigerant that has flowed in to flow to a piping (21) on the intake side of the compressor (1). A refrigeration oil (50) contained in the refrigerant is retained in the expander shell (34), and the refrigeration oil (50) is supplied to the expansion part (31) and/or the power generator (32).