| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water heater, remarkably lessening load of cleaning for a bathtub and a bathroom. <P>SOLUTION: This water heater includes: a water heat exchanger 11 made of copper and adapted to heat water; and an insoluble copper soap removing device 31 for restraining copper ions flowing out to a pipeline 25b connected to the water heat exchanger 11 from being bonded to soap and deposited as copper soap, wherein deposition of the copper ions as blue copper soap can be restrained so that load of cleaning for the bathtub and the bathroom (not shown) can be remarkably lessened. <P>COPYRIGHT: (C)2009,JPO&INPIT |
