Hot water supply air conditioning system

A hot water supply air conditioning system comprising:

• a hot water supplier including a hot water storage tank configured to store hot water to be supplied;
• a thermal storage including a thermal storage tank configured to store a thermal storage medium;
• and
• a refrigerant circuit including
• a hot-water-supply-side heat exchanger connected to the hot water supplier,
• a thermal-storage-side heat exchanger connected to the thermal storage,
• a heat-source-side heat exchanger configured to exchange heat between refrigerant and outdoor air, and
• a utilization-side heat exchanger configured to condition room air,
• wherein the hot water supply air conditioning system performs
• a cold-storage operation in which the refrigerant circuit performs a refrigeration cycle such that the thermal-storage-side heat exchanger serves as an evaporator and the thermal storage cools the thermal storage medium of the thermal storage tank with refrigerant flowing through the thermal-storage-side heat exchanger, and
• a cold-used air-cooling operation in which the refrigerant circuit circulates refrigerant from the thermal-storage-side heat exchanger to the utilization-side heat exchanger and the thermal storage cools refrigerant flowing through the thermal-storage-side heat exchanger with the thermal storage medium of the thermal storage tank, and
• during the cold-storage operation, the hot water supply air conditioning system performs
• a first operation in which the hot-water-supply-side heat exchanger serves as a radiator and the hot water supplier heats the water of the hot water storage tank with heat dissipated from refrigerant, and
• a second operation in which the heat-source-side heat exchanger serves as the radiator.