A refrigeration cycle device (100) is equipped with a volume control compressor (101), a volume control passage (111), a four-way valve (flow path switching unit) (112), a high-pressure introduction passage (114), a low-pressure introduction passage (116), and a check valve (120). When the load is small, the four-way valve (112) is controlled such that the volume control passage (111) is connected to the low-pressure introduction passage (116). When the load is large, the four-way valve (112) is controlled such that the volume control passage (111) is connected to the high-pressure introduction passage (114). The high-pressure introduction passage (114) is provided with the check valve (120), which allows the circulation of refrigerant from a flow path (10a) to the four-way valve (112) and prevents circulation in the opposite direction.