Refrigeration cycle apparatus

A refrigeration cycle apparatus comprising

• a refrigerant circuit formed by connecting, by pipes,
• a compressor configured to compress refrigerant sucked into the compressor and discharge the refrigerant,
• a condenser configured to allow the refrigerant to reject heat and condense the refrigerant,
• a pressure reducing device configured to reduce a pressure of the condensed refrigerant, and
• an evaporator configured to allow the refrigerant to remove heat and evaporate the refrigerant;
• a gas-liquid separator installed between the pressure reducing device and the evaporator, and configured to separate gaseous refrigerant and liquid refrigerant from each other;
• a bypass pipe configured to connect the gas-liquid separator and a suction side of the compressor to each other;
• a refrigerant control device configured to control an amount of refrigerant passing through the bypass pipe;
• a flow switching device configured to switch a circulation passage of the refrigerant;
• and
• a rectifier configured to control the circulation passage of the refrigerant so that the refrigerant passes through the pressure reducing device, the gas-liquid separator, and the evaporator in a stated order,
• the refrigerant being a refrigerant mixture comprising R32 and HFO-1123, and in the refrigerant mixture, R32 is greater than HFO-1123 in mass %.