Air-conditioning apparatus

An air-conditioning apparatus comprising:

• a circuit in which a compressor, a flow switching device, an indoor heat exchanger, a pressure reducing device, and a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel with each other are connected by pipes and through which refrigerant flows;
• a bypass circuit having a bypass pipe that connects a discharge side of the compressor to a point between the flow switching device and the first outdoor heat exchanger and to a point between the flow switching device and the second outdoor heat exchanger and allows part of the refrigerant discharged from the compressor to be diverted into the bypass pipe and flow through the bypass pipe;
• a flow control device provided to the bypass pipe and configured to adjust a flow rate of the refrigerant flowing through the bypass pipe;
• and
• a controller configured to control the flow switching device, the pressure reducing device, and the flow control device,
• the air-conditioning apparatus being configured to operate in a normal heating operation mode in which the first outdoor heat exchanger and the second outdoor heat exchanger operate as evaporators and in a heating-defrosting operation mode in which one of the first outdoor heat exchanger and the second outdoor heat exchanger is defrosted as a target to be defrosted and an other outdoor heat exchanger operates as an evaporator,
• the controller being configured to, during the heating-defrosting operation mode, compare a first condensing temperature obtained when the target to be defrosted is switched from one to an other with a second condensing temperature obtained when an operation mode is switched from the normal heating operation mode to the heating-defrosting operation mode, reduce, when the first condensing temperature is less than the second condensing temperature, an opening degree of the flow control device smaller than an initial opening degree being set when the normal heating operation mode is shifted to the heating-defrosting operation mode, and increase, when the first condensing temperature is greater than the second condensing temperature, the opening degree of the flow control device larger than the initial opening degree.