| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a water heater with reheating piping for performing automatic cleaning motion by fine bubbles, constantly keeping the inside of the reheating piping and a heat exchanger clean, and dispensing with maintenance. <P>SOLUTION: This water heater with a reheating function includes hot water filling piping 26, a hot water filling solenoid valve 44, a bath-side water distribution circuit having bathtub returning piping 17 and bathtub going piping 18, a bath-side water distribution pump 16 for circulating bath water, the heat exchanger 11 for reheating the bath water, a water level sensor 39 detecting a water level of a bathtub 15, a flow switch 47 detecting the presence or absence of water flow in distributing the water, a circulation-side fine bubble generating device 28 disposed in the bath-side water distribution circuit, a hot water filling-side fine bubble generating device 31 disposed on the way of the hot water filling piping 26, and a control section 45 for controlling the water heater as a whole, the control section 45 operates the bath-side water distribution pump 16 and the circulation-side fine bubble generating device 28 when the lowering of water level of the bathtub 15 is detected by the water level sensor 39, thus the fine bubbles is introduced into the bath-side water distribution circuit, and the heat exchanger 11, the bathtub returning piping 17 and the bathtub going piping 18 are automatically cleaned. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
