A refrigeration cycle device relating to the present invention has a heating mode and a defrosting mode as operation modes. The refrigeration cycle device is provided with a compressor (10), first and second heat exchangers, an expansion valve, and a control device. The compressor (10) is driven by means of a motor (12). The compressor (10) stores a refrigerator oil. The control device drives the motor (12). In the heating mode, a refrigerant (RL1) circulates in the order of the compressor (10), the first heat exchanger, the expansion valve, and the second heat exchanger. The density of the refrigerant (RL1) is smaller than that of the refrigerator oil (RO1). In the compressor (10), the liquid refrigerant (RL1) and the refrigerator oil (RO1) are separated into two layers in the defrosting mode. The control device increases a heat loss of the motor (12) in the defrosting mode more than a heat loss of the motor in the heating mode.