| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent waste of gas by varying the set temperature when hot water is delivered unconsciously for a long time and notifying the user that hot water is used for a long time through variation of the hot water temperature. SOLUTION: The hot water supply apparatus comprises a proportional control valve 5 for regulating fuel, a hot water delivery thermistor 4 for detecting the temperature of hot water, a hot water temperature setter, and means for altering the set temperature of the hot water temperature setter automatically upon elapsing an arbitrary time. According to the arrangement, a user can be notified that hot water is used for a long time.</p> |
