| 摘要 |
PURPOSE:To shorten a required time for feeding hot water by a method wherein after a hot water of stored amount for hot water up to a reference water level is dropped into a bath tub, its water level is detected, and if a water level difference with the reference water level is less than a specified value, a hot water of the stored amount from the reference water level to the set water level is dropped once. CONSTITUTION:At the beginning, a hot water of amount (q1) is dropped into a bath tub 1 through an additional boiling circuit 2 and it is detected whether there remains water of abnormal bath adapter level in the bath tub 1. When no presence of remaining water is confirmed, a hot water of (q2+... qn) is dropped once. As a result, an amount of hot water (q1+q2+...+qn(=Q1)) up to a water level (a reference water level) when the hot water is dropped more than the bath adapter level during setting of the water level. Then, it is judged whether a water level difference H1-h1 between the water level h1 detected by a pressure sensor 7 and a reference water level R1 when the water level is set is less than a specified value (k) or not. If the inside part of the bath tub 1 is vacant at first, since the water level difference becomes O and the hot water of stored amount (qs+qh+qt(=Q2)) from the reference water level to the set water level is dropped at once. |
