Air conditioning apparatus

An air conditioning apparatus, comprising:

• a pump that circulates a heat medium in a heat medium circuit;
• a plurality of indoor heat exchangers provided in the heat medium circuit and provided in parallel with one another;
• a plurality of flow regulating valves respectively provided for the plurality of indoor heat exchangers;
• a plurality of heat medium temperature detection units respectively provided for the plurality of indoor heat exchangers;
• a heat source device that adjusts a temperature of the heat medium;
• and
• a control unit that:
• controls the pump such that a heat medium at a predetermined flow rate circulates through the heat medium circuit upon multiple unit operation having the heat medium flowing to the plurality of indoor heat exchangers;
• regards an indoor heat exchanger of the plurality of indoor heat exchangers as a largest heat load indoor heat exchanger, the indoor heat exchanger having a largest heat load among the plurality of indoor heat exchangers;
• calculates a largest heat load target flow rate on the basis of a heat load on the largest heat load indoor heat exchanger;
• controls a flow regulating valve of the plurality of flow regulating valves, the flow regulating valve corresponding to the largest heat load indoor heat exchanger, such that a flow rate of a heat medium flowing through the largest heat load indoor heat exchanger becomes equal to the largest heat load target flow rate;
• regards another indoor heat exchanger of the plurality of indoor heat exchangers as a residual heat load indoor heat exchanger, the another indoor heat exchanger being different from the largest heat load indoor heat exchanger;
• and controls another flow regulating valve of the plurality of flow regulating valves, the another flow regulating valve corresponding to the residual heat load indoor heat exchanger, such that a flow rate of a heat medium flowing through the residual heat load indoor heat exchanger becomes equal to a residual heat load target flow rate calculated on the basis of a heat load on the residual heat load indoor heat exchanger and another temperature of a heat medium flowing into the largest heat load indoor heat exchanger, the another temperature having been measured by the heat medium temperature detection unit corresponding to the largest heat load indoor heat exchanger.