Air-conditioning apparatus

An air-conditioning apparatus comprising:

• a main circuit in which a compressor, a flow switching device, an indoor heat exchanger, a pressure reducing device, and a plurality of parallel heat exchangers connected in parallel with each other are connected by pipes, the main circuit serving as a refrigerant circuit through which refrigerant is circulated;
• a bypass pipe connecting one of the pipes that is connected to a discharge side of the compressor and some of the pipes that are connected to the plurality of parallel heat exchangers;
• a flow control valve provided to the bypass pipe, the flow control valve being configured to adjust a flow rate of the refrigerant flowing through the bypass pipe;
• an evaporating pressure sensor configured to measure an evaporating pressure of the refrigerant;
• and
• a controller,
• wherein the air-conditioning apparatus is configured to operate in a normal heating operation mode in which an operation is performed such that the plurality of parallel heat exchangers operate as evaporators and a heating-defrosting operation mode in which an operation is performed such that one of the plurality of parallel heat exchangers is defrosted and another of the plurality of parallel heat exchangers operates as an evaporator, and
• wherein in response to the operation associated with the normal heating operation mode being switched to the operation associated with the heating-defrosting operation mode, the controller adjusts an opening degree of the flow control valve using the evaporating pressure in the parallel heat exchanger that operates as an evaporator and a driving frequency of the compressor.