| 摘要 |
PURPOSE: To ensure cutting of a bath followup boiling circuit off a hot water supply path by determining the way of opening or closing an air charge valve according to the position of a bathtub detected by a bath water level sensor in a circulation path for bath followup boiling and specifying the way of opening or closing the air charge valve irrelevant to the position of the bathtub. CONSTITUTION: First and second hot water check valves 92 and 95 for preventing the reversion of water supplied are provided on the downstream side of a hot water valve 91 and an air charge chamber 93 is connected to a path between the first and second hot water check valves 92 and 95 from the side thereof. The air charge chamber 93 is opened or closed by an air charge valve 96 to determine the way of controlling the opening or closing thereof by a control 80 early in the setting of a bathtub 20. The way of opening or closing the air charge valve 96 is determined automatically according to the position of the bathtub 20 detected by a bath water level sensor 44 of a circulation path 30 for bath followup boiling. In addition, the way of opening or closing the air charge valve 96 is specified by a switching means 81 irrelevant to the position of the bathtub 20. This enables preventing of uncertainty in the detection of the bath water level. |
