Patent ID: 9683768
Date: 2017-06-20
CPC Classifications: F25B,Y02B

Claim:
1. An air-conditioning apparatus comprising: a compressor; a heat source side heat exchanger configured to function as a condenser or an evaporator; a plurality of use side heat exchangers each configured to function as a condenser or an evaporator; a plurality of expansion devices each provided for a corresponding one of the plurality of use side heat exchangers, and each configured to adjust a flow rate of a refrigerant that flows through the corresponding one of the plurality of use side heat exchangers; and a controller configured to control an operation capacity of the compressor and opening degrees of the plurality of expansion devices, wherein when increasing heat exchange performance of a first use side heat exchanger that is at least one, but not all, of the plurality of use side heat exchangers, the controller the heat source side heat exchanger is configured to function as an evaporator and the plurality of use side heat exchangers are configured to function as condensers, the controller is configured to control the operation capacity of the compressor such that condensing saturation temperatures of the refrigerant that flows through the plurality of use side heat exchangers become a predetermined condensing saturation temperature target value, and when increasing the heat exchange performance of the first use side heat exchanger, the controller increases the operation capacity of the compressor by increasing a value of the condensing saturation temperature target value, the controller is configured to control the opening degrees of the expansion devices corresponding to the plurality of use side heat exchangers that function as condensers such that degrees of subcooling of the refrigerant that flows through the plurality of use side heat exchangers that function as condensers become a predetermined target degree of subcooling, and when increasing the heat exchange performance of the first use side heat exchanger, decreases the flow rate in the second use side heat exchanger by increasing the target degree of subcooling.