| 摘要 |
PROBLEM TO BE SOLVED: To control the filling of hot water by considering the temperature change of the hot water passing a heat exchanger for reheating bathtub water by controlling a hot water supply burner from the temperatures of the hot water which passes the exchanger and the hot water which does not pass through the exchanger. SOLUTION: A set temperature TS is read, and a hot water filling valve is opened (steps 101, 103). The deviation ΔT of the detected temperature T1 of the hot water which does not pass a heat exchanger of reheating bathtub water and the detected temperature T2 of the hot water which passes through the exchanger is obtained (step 108), and the target temperature T is obtained from the deviation ΔT (step 109). The target temperature TM is higher than the set temperature TS. Thereafter, the combustion control of a hot water supply burner is conducted so that the temperature T1 becomes the temperature TM (step 110). |
