Refrigeration cycle apparatus

摘要

The volume ratio of a hot-water-supply-side liquid extension pipe to a water heat exchanger is set to be equal to or more than the minimum volume ratio, which is the volume ratio of the hot-water-supply-side liquid extension pipe to the water heat exchanger when the required refrigerant amount during a cooling and hot water supply simultaneous operation in which an indoor-side heat exchanger serves as an evaporator, the water heat exchanger serves as a condenser, cooling energy is supplied from the indoor-side heat exchanger, and heating energy is supplied from the water heat exchanger is equal to the required refrigerant amount during a heating operation in which a heat-source-side heat exchanger serves as an evaporator, the indoor-side heat exchanger serves as a condenser, and heating energy is supplied from the indoor-side heat exchanger.

主权项

1. A refrigeration cycle apparatus comprising:
a heat source unit including a compressor, a heat-source-side heat exchanger, an expansion valve, and a liquid reservoir; an indoor unit including an indoor-side heat exchanger; and a hot water supply unit including a water heat exchanger, the heat source unit and the indoor unit being connected together by indoor-side liquid extension pipes including an indoor-side liquid extension pipe and an indoor-side gas extension pipe, and the heat source unit and the hot water supply unit being connected together by hot-water-supply-side liquid extension pipes including a hot-water-supply-side liquid extension pipe and a hot-water-supply-side gas extension pipe, wherein the refrigeration cycle apparatus performs a cooling and hot water supply simultaneous operation in which the indoor-side heat exchanger serves as an evaporator and the water heat exchanger serves as a condenser, a heating operation in which the heat-source-side heat exchanger serves as an evaporator and the indoor-side heat exchanger serves as a condenser, and a cooling operation in which the heat-source-side heat exchanger serves as a condenser and the indoor-side heat exchanger serves as an evaporator, a capacity of the heat-source-side heat exchanger is larger than a capacity of the indoor-side heat exchanger and the water heat exchanger, and the hot-water-supply side liquid extension pipe and the water heat exchanger have a volume ratio of the hot-water-supply-side liquid extension pipe to the water heat exchanger is equal to or more than a volume ratio of the hot-water-supply-side liquid extension pipe to the water heat exchanger when a required refrigerant amount during the cooling and hot water supply simultaneous operation is equal to a required refrigerant amount during the heating operation.