| 摘要 |
PROBLEM TO BE SOLVED: To acquire a heat pump hot water supply system capable of suppressing scale deposit to a heat exchanger.SOLUTION: A control device 30 of a heat pump hot water supply system 200, in the case where a tank water temperature detected from a temperature sensor 20 is lower than a heat source switching tank temperature, drives a circulation pump 5, a circulation pump 13 and a circulation pump 15, and by using a heat pump unit 1, increases the tank water temperature in a hot water storage tank 14 via a plate heat exchanger 11, and in the case where the tank water temperature detected from the temperature sensor 20 is equal to or greater than the heat source switching tank temperature, stops the circulation pump 5, and drives a circulation pump 9, the circulation pump 13 and the circulation pump 15, and by using a boiler 6, increases the tank water temperature in the hot water storage tank 14 via the plate heat exchanger 11 in time shorter than that in the case where the heat pump unit 1 is used.SELECTED DRAWING: Figure 1 |
