Patent ID: 9719708
Date: 2017-08-01
CPC Classifications: F24F,F25B

Claim:
1. An air-conditioning apparatus capable of cooling and heating mixed operation, comprising: at least one heat-source-side unit including a compressor and an outdoor heat exchanger and that 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; an opening and closing valve mounted in the heat-source-side unit and connected to a pipe in which a refrigerant flows when the outdoor heat exchanger functions as an evaporator and does not flow when the outdoor heat exchanger functions as a condenser to adjust a flow of the 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 an operation in which the outdoor heat exchanger functions as the evaporator, 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.