HOT-WATER SUPPLY DEVICE

摘要

A hot-water supply device (10) has a first refrigerant circuit (20), a medium-temperature water circuit (40), a second refrigerant circuit (60), and a high-temperature water circuit (80). The first refrigerant circuit (20) forms a heat pump using outdoor air as the heat source and heats heat medium water in the medium-temperature water circuit (40). In the medium-temperature water circuit (40), the heat medium water circulates between a radiator (45) for floor heating, a second heat exchanger (50), and a first heat exchanger (30). The second refrigerant circuit (60) forms a heat pump using as the heat source the heat medium water in the medium-temperature water circuit (40) and heats water for hot water supply in the high-temperature water circuit (80).