| 摘要 |
<p>PROBLEM TO BE SOLVED: To limit the multiplication of useless unwanted bacteria and microorganisms in the filtering device of a hot water circulation device. SOLUTION: This hot water circulation device 10 circulates bathing water so as to purify the bathing water taken from the inside of a bathtub 32 in the filtering device 20, heat it to a prescribed temperature and then return it to the bathtub 32. In this case, the bathing water to be sent into the filtering device 20 is heated to a temperature at which purifying bacteria with excellent heat resistance characteristics multiplied inside the filtering device 20 can live for annihilating the other useless unwanted bacteria or microorganisms by a heating means 19 for sterilization provided in a piping system on a water take-in side from the filtering device 20, hot water discharged from the inside of the filtering device 20 provided on a part on the side of an ejection part 24 from the filtering device 20 of the piping system is cooled to the prescribed temperature for bathing or heat insulation, and then, the bathing water is circulated back into the bathtub 32.</p> |
