A refrigeration cycle apparatus (100, 200, 300) comprising: a refrigerant circuit configured by connecting a compressor, a refrigerant flow switching device, a first heat exchanger, a first pressure reducing device, a refrigerant container, a second pressure reducing device, and a second heat exchanger by a pipe; a bypass guiding at least part of a refrigerant accumulated in the refrigerant container toward a suction side of the compressor through a third pressure reducing device and a refrigerant heat exchanger, a controller, and sensors (55, 56, 57) detecting pressure of refrigerant discharged from the compressor, pressure of refrigerant sucked by the compressor, and pressure of refrigerant flowing between the first pressure reducing device and the second pressure reducing device, wherein the refrigerant heat exchanger is provided within the refrigerant container, and configred to exchange heat between a flow of the refrigerant that circulates in the pypass and a flow of the refrigerant that is accumulated in the refrigerant container, and the third pressure reducing device is configured to adjust an amount of heat exchanged in the refrigerant heat exchanger, characterized in that in a case in which the first heat exchanger functions as a condenser and the second heat exchanger functions as an evaporator, when an opening degree of the first pressure reducing device is equal to or larger than an upper threshold, the controller is configured to control an opening degree of the third pressure reducing device to be larger than a current opening degree such that a pressure difference between before and after the first pressure reducing device becomes larger than a current pressure difference. a refrigerant circuit configured by connecting a compressor, a refrigerant flow switching device, a first heat exchanger, a first pressure reducing device, a refrigerant container, a second pressure reducing device, and a second heat exchanger by a pipe; a bypass guiding at least part of a refrigerant accumulated in the refrigerant container toward a suction side of the compressor through a third pressure reducing device and a refrigerant heat exchanger, a controller, and sensors (55, 56, 57) detecting pressure of refrigerant discharged from the compressor, pressure of refrigerant sucked by the compressor, and pressure of refrigerant flowing between the first pressure reducing device and the second pressure reducing device, wherein the refrigerant heat exchanger is provided within the refrigerant container, and configred to exchange heat between a flow of the refrigerant that circulates in the pypass and a flow of the refrigerant that is accumulated in the refrigerant container, and provided within the refrigerant container, and configred to exchange heat between a flow of the refrigerant that circulates in the pypass and a flow of the refrigerant that is accumulated in the refrigerant container, and the third pressure reducing device is configured to adjust an amount of heat exchanged in the refrigerant heat exchanger, characterized in that in a case in which the first heat exchanger functions as a condenser and the second heat exchanger functions as an evaporator, when an opening degree of the first pressure reducing device is equal to or larger than an upper threshold, the controller is configured to control an opening degree of the third pressure reducing device to be larger than a current opening degree such that a pressure difference between before and after the first pressure reducing device becomes larger than a current pressure difference.