| 摘要 |
PROBLEM TO BE SOLVED: To provide a heating water heater being simultaneously ready to supply heated fluid which is heated to a heating terminal and to heat the heated fluid stored in a tank part.SOLUTION: A heating water heater comprises: a first heat exchanger (31) that heat exchanges between coolant flowing through a refrigeration circuit (21) and heated fluid flowing through a heated fluid circuit (23); a tank part (41) that accumulates the heated fluid; a second heat exchanger (61) that heat exchanges between the heated fluid in the tank part (41) and water flowing through a hot water supply circuit (25); and at least any one of a third heat exchanger (63) and a fourth heat exchanger (65). The third heat exchanger (63) exchanges heat between the heated fluid in the tank part (41) and the coolant on the refrigerant inflow side of the first heat exchanger (31). The fourth heat exchanger (65) exchanges heat between the heated fluid in the tank part (41) and the coolant on the refrigerant outflow side of the first heat exchanger (31).SELECTED DRAWING: Figure 1 |
