| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology capable of operating a heat pump with high COP, in a hot water supply heating system performing heating and hot water supply by using the heat pump.SOLUTION: A hot water supply heating system includes: a heat pump including a compressor, a condenser for condensing a refrigerant by heat exchange with a heat medium for heating and/or water for hot water supply, an expander, and an evaporator; a heater for circulating the heat medium for heating between the condenser and a heating terminal; and a water heater for supplying the water for hot water supply from a water supply source to a hot water supply point via the condenser. In the condenser, the refrigerant and the heat medium for heating flow as counterflow, and the refrigerant and the water for hot water supply flow as counterflow. The condenser includes a three-fluid heat exchanger performing both of heat exchange between the refrigerant and the heat medium for heating, and heat exchange between the refrigerant and the water for hot water supply, and a two-fluid heat exchanger disposed at a downstream side with respect to the three-fluid heat exchanger when viewed from refrigerant flow, and performing only the heat exchange between the refrigerant and the water for hot water supply. |
