| 摘要 |
PROBLEM TO BE SOLVED: To provide a one can two water path bath water heater which properly catches a water level of bathtub hot water and properly performs the cleaning of reheating circulation path cleaning after drainage even when hot water supply is performed during drainage operation of bathtub hot water.SOLUTION: In a one can two water path bath water heater, a water level of bathtub hot water is detected every set sampling timing by a pressure sensor 14 upon bathtub hot water drainage in the hot water use state, time series variation information of the water level of bathtub is determined by a moving average method and, when a reduction amount per unit time of the bathtub water level is larger than the predetermined water level reduction limit value in the time series variable information of the bathtub water level, an information correction means 26 replaces the value to the water level reduction limit value and corrects the time series variable information of the bathtub water level. Based on the corrected bathtub water level variable corrected information, the bathtub water level is reduced and, when the water level comes to the predetermined pipeline cleaning start standard water level or less or when the predetermined setting time elapses after the water level comes to the pipeline cleaning start standard water level or less, reheating circulation path 3 is cleaned. |
