| 摘要 |
PURPOSE:To prevent insufficient hot water quantity of hot water in a bathtub in a bath hot water filling apparatus by checking presence or absence of a water flow switch before a circulation is decided and transferring to a hot water supply mode only in the case of no flow. CONSTITUTION:When a water flow switch is ON after presence or absence of water flow of the switch is inspected, its following operation is finished as the switch is troubled. When the switch is OFF, a pump is driven (S32). If there is no water in a bathtub by the drive of the pump, the switch is not turned ON, and hence the pump is stopped (S39), and then a predetermined quantity of hot water is filled (S40). This operation is repeated until the switch is ON. When the switch is ON, the pump is stopped (S34). At this time point a water level in the bathtub is stored as a water level reference value (S35). After the predetermined quantity of the hot water is filled (S36), a bottom area of the bathtub is calculated (S37), and the hot water is filled up to a set water level (S38). |
