| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to regulate the temperature of hot water stored in a bathtub to a predetermined temperature while alleviating user's inconvenience.SOLUTION: A temperature of hot water stored in a bathtub is regulated by selectively performing a reheating operation for increasing the temperature of the hot water stored in the bathtub by heat of hot water in a tank using a heat exchanger on the basis of a target hot water temperature and a current temperature of the hot water stored in the bathtub, and a bath heat recovery operation for causing the hot water in the tank to recover the heat of the hot water stored in the bathtub using the heat exchanger and reducing the temperature of the hot water stored in the bathtub (S104 to S120).SELECTED DRAWING: Figure 3 |
