Patent ID: 9528713
Filing Date: 2016-12-27
CPC Classification: F24D,F24F,F24H,F25B,Y02B,Y02E

Claim Text:
1. A combined hot water supply and air-conditioning device comprising: at least one heat source unit that is equipped with an air-conditioning compressor that compresses a first refrigerant, and a heat source unit-side heat exchanger; a plurality of indoor units that are connected in parallel to the heat source unit, the indoor units being equipped with a use-side heat exchanger through which the first refrigerant flows; at least one hot water supply unit that is connected in parallel to the heat source unit, the hot water supply unit being equipped with a refrigerant-refrigerant heat exchanger through which the first refrigerant and a second refrigerant flow, a heat medium-refrigerant heat exchanger through which a heat medium and the second refrigerant flow, and a hot water supply compressor that compresses the second refrigerant; and a controller configured to control a capacity of the heat source unit-side heat exchanger equipped to the heat source unit; wherein in heating operation, the controller is configured to set a lower limit for a capacity of the heat source unit-side heat exchanger, and control the capacity of the heat source unit-side heat exchanger to adjust the capacity of the heat source unit-side heat exchanger relative to a heating operation capacity ratio to prevent deviation from a predetermined operating range of the air-conditioning compressor and to suppress an increase in pressure, the heating operation capacity ratio is a value obtained by dividing a total load of the indoor units and the hot water supply unit by a load of the heat source unit.