Air-conditioning apparatus

An air-conditioning apparatus capable of performing a cooling and heating mixed operation, including

• a refrigerant circuit formed by piping connection of
• a heat source unit having a compressor, a heat source unit-side heat exchanger configured to exchange heat between an outside air and refrigerant, a heat source unit-side flow rate control device, and a four-way switching valve,
• a plurality of indoor units each having an indoor unit-side heat exchanger configured to exchange heat between an air to be conditioned and the refrigerant, and an indoor unit-side flow rate control device, and
• a relay unit connected between the heat source unit and the plurality of indoor units, and configured to form a passage for supplying a gas refrigerant to the indoor unit that performs heating and supplying a liquid refrigerant to the indoor unit that performs cooling, the air-conditioning apparatus comprising;
• a bypass configured to turn a part of the refrigerant, which is discharged from the compressor and yet to flow into the relay unit, into a two-phase gas-liquid state or a liquid state by exchanging heat with the outside air, and cause the refrigerant to flow into a suction side of the compressor or an intermediate portion of a compression stroke of the compressor;
• a bypass flow rate control device provided to the bypass;
• and
• a controller configured to control based on a discharge temperature of a discharge refrigerant discharged from the compressor.