A refrigeration cycle apparatus (1, 1A, 1B) comprising: a first heat exchanger; a second heat exchanger having a capacity smaller than a capacity of the first heat exchanger; a compressor; a first decompressor; a flow path switch configured to form a flow path in which refrigerant circulates in a first circulation direction in order of the first heat exchanger, the first decompressor, the second heat exchanger, and the compressor, or in a second circulation direction reverse to the first circulation direction; a blower configured to blow air to the first heat exchanger; a refrigerant tank circuit branching from between the first heat exchanger and the first decompressor and joining between the first decompressor and the second heat exchanger, the refrigerant tank circuit being in parallel with the first decompressor and including a second decompressor, a refrigerant tank and a valve in series, the valve opening and closing a flow path between the refrigerant tank and the second heat exchanger; a discharge pressure sensor configured to detect a discharge pressure of the refrigerant at a discharge side of the compressor; and a controller (20, 20A) configured to control the flow path switch, the blower, the second decompressor and the valve and to switch an operation mode including a heating mode and a defrosting mode, the defrosting mode including a refrigerant recovery operation, in the heating mode, the flow path switch being controlled to form the flow path in which the refrigerant circulates in the second circulation direction, in the defrosting mode, the flow path switch being controlled to form the flow path in which the refrigerant circulates in the first circulation direction and the refrigerant tank circuit being controlled to release the refrigerant from the refrigerant tank to the flow path by opening one of the second decompressor and the valve to discharge the refrigerant from the refrigerant tank, when a saturation temperature of the refrigerant discharged from the compressor is more than a threshold value in the defrosting mode, the refrigerant recovery operation being performed to recover the refrigerant to the refrigerant tank by opening both the second decompressor and the valve while circulating the refrigerant in the first circulation direction, and the blower being operated during the refrigerant recovery operation, the saturation temperature being converted from the discharge pressure detected by the discharge pressure sensor. a first heat exchanger; a second heat exchanger having a capacity smaller than a capacity of the first heat exchanger; a compressor; a first decompressor; a flow path switch configured to form a flow path in which refrigerant circulates in a first circulation direction in order of the first heat exchanger, the first decompressor, the second heat exchanger, and the compressor, or in a second circulation direction reverse to the first circulation direction; a blower configured to blow air to the first heat exchanger; a refrigerant tank circuit branching from between the first heat exchanger and the first decompressor and joining between the first decompressor and the second heat exchanger, the refrigerant tank circuit being in parallel with the first decompressor and including a second decompressor, a refrigerant tank and a valve in series, the valve opening and closing a flow path between the refrigerant tank and the second heat exchanger; a discharge pressure sensor configured to detect a discharge pressure of the refrigerant at a discharge side of the compressor; and a controller (20, 20A) configured to control the flow path switch, the blower, the second decompressor and the valve and to switch an operation mode including a heating mode and a defrosting mode, the defrosting mode including a refrigerant recovery operation, in the heating mode, the flow path switch being controlled to form the flow path in which the refrigerant circulates in the second circulation direction, in the defrosting mode, the flow path switch being controlled to form the flow path in which the refrigerant circulates in the first circulation direction and the refrigerant tank circuit being controlled to release the refrigerant from the refrigerant tank to the flow path by opening one of the second decompressor and the valve to discharge the refrigerant from the refrigerant tank, when a saturation temperature of the refrigerant discharged from the compressor is more than a threshold value in the defrosting mode, the refrigerant recovery operation being performed to recover the refrigerant to the refrigerant tank by opening both the second decompressor and the valve while circulating the refrigerant in the first circulation direction, and the blower being operated during the refrigerant recovery operation, the saturation temperature being converted from the discharge pressure detected by the discharge pressure sensor.