Air-conditioning apparatus for a plurality of parallel outdoor units

An air-conditioning apparatus comprising:

• a main circuit sequentially connecting, via a plurality of pipes, a compressor, an indoor heat exchanger, a first flow control device, and a plurality of parallel outdoor heat exchangers connected in parallel to each other to allow refrigerant to circulate;
• a defrost pipe branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant branched by the defrost pipe to flow into one of the plurality of parallel outdoor heat exchangers;
• an interface heat exchanger located between the plurality of parallel outdoor heat exchangers;
• a first bypass pipe branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant branched by the first bypass pipe to flow into the interface heat exchanger;
• a second bypass pipe causing the part of the refrigerant flowing out of the interface heat exchanger to flow into the main circuit;
• and
• one or both of
• a first expansion device configured to depressurize the refrigerant discharged from the compressor and flowing into the interface heat exchanger, and
• a second expansion device configured to depressurize the refrigerant flowing out of the interface heat exchanger,
• wherein the plurality of parallel outdoor heat exchangers includes only a first and a second outdoor heat exchanger parallel to each other.