Air-conditioning apparatus

An air-conditioning apparatus comprising:

• a refrigerant circuit configured to circulate a heat source-side refrigerant, the refrigerant circuit being a refrigerant-side flow path formed by connecting, with refrigerant pipes, a compressor, a refrigerant flow switching device, a heat source-side heat exchanger, a plurality of expansion devices, and a plurality of intermediate heat exchangers that exchange heat between the heat source-side refrigerant and a heat medium different from the refrigerant;
• a heat medium circuit configured to circulate the heat medium, the heat medium circuit being a heat medium-side flow path formed by connecting, with heat medium pipes, a pump, a plurality of heat medium flow switching devices, a plurality of use-side heat exchangers that act as indoor units, a plurality of heat medium flow control devices, and the intermediate heat exchangers;
• a heat medium relay unit that accommodates the plurality of intermediate heat exchangers, the pump and the plurality of heat medium flow switching devices;
• temperature sensors configured to detect a temperature of the heat medium sent from each of the intermediate heat exchangers to each of the use-side heat exchangers, and a temperature of the heat medium that has exited each of the use-side heat exchangers;
• and
• a controller configured to
• control an opening degree of each of the heat medium flow control devices,
• determine a correction value for each of the heat medium flow control devices to correct a variation in the opening degree of each of the heat medium flow control devices caused by a difference in pipe length between each of the intermediate heat exchangers and each of the indoor units,
• compute a usage capacity of each of the indoor units from a rotation speed of the pump, a corrected opening degree of each of the heat medium flow control devices, the temperatures detected by the temperature sensors, and a power consumption of each of the indoor units, the corrected opening degree being obtained by correcting the opening degree of each of the heat medium flow control devices by the correction value,
• compute a power consumption for a common portion that is common to each of the indoor units, and
• compute a divided power consumption for the common portion for each of the indoor units by dividing the power consumption for the common portion among each of the indoor units proportionally to the computed usage capacity of each of the indoor units.