Refrigeration cycle device

A refrigeration cycle device that can selectively configure either a first refrigerant circuit for cooling, which causes a refrigerant to flow out through a liquid-phase refrigerant outlet (17c) of a vapor-liquid separator (17), or a second refrigerant circuit for heating, which causes a refrigerant to flow out through a vapor-phase refrigerant outlet (17b) of the vapor-liquid separator (17), wherein an oil separator (24) is provided in the refrigerant path from a radiator (12) to a first expansion valve (28). Thus, if the first refrigerant circuit is configured in the refrigeration cycle device (10), the refrigerant passing through the oil separator (24) is completely or mostly brought into the vapor phase, and the oil can be easily separated from the refrigerant. Furthermore, if the refrigerant is circulated in the first refrigerant circuit, the oil can also be stored in a place other than the vapor-liquid separator (17). 本发明是种制冷循环装置，能够选择地构成使制冷剂从气液分离器(17)的液相制冷剂出口(17c)流出的制冷用第制冷剂回路和使制冷剂从所述气液分离器(17)的气相制冷剂出口(17