Air-conditioning apparatus

An air-conditioning apparatus capable of cooling and heating mixed operation and configured such that at least one heat-source-side unit including a compressor and an outdoor heat exchanger is connected to a plurality of load-side units each including an expansion device and an indoor heat exchanger, the plurality of load-side units being connected to the heat-source-side unit in parallel,

• the air-conditioning apparatus comprising:
• an opening and closing valve mounted in the heat-source-side unit to adjust a flow of refrigerant from the load-side units to the outdoor heat exchanger;
• a heat-source-side expansion device mounted in the heat-source-side unit and provided in parallel with the opening and closing valve;
• and
• a controller configured to control at least opening and closing of the opening and closing valve and an opening degree of the heat-source-side expansion device, wherein the controller,
• in a heating main operation mode in which a heating load is dominant in the cooling and heating mixed operation with the plurality of load-side units and under a condition where a liquid pipe temperature of the load-side unit that is performing a cooling operation is within a temperature range of antifreezing control,
• closes the opening and closing valve, and
• controls the opening degree of the heat-source-side expansion device according to an evaporating temperature of the load-side unit requesting cooling so as to adjust the evaporating temperature to be within a predetermined range.