| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the necessary electric power consumption while sufficiently maintaining the cleaning by microorganisms. SOLUTION: Bath water is supplied at all times to a cleaning cylinder 4 by circulating the bath water in a bathtub 2 and the cleaning cylinder 4 and is cleaning in the purifying cylinder 4. The bath water supplied to the cleaning cylinder 5 is so heated by a heater 8 as to attain the temp. within a correct range for cleaning by the microorganisms. A supply piping 5 and a discharge piping 6 are provided with a heat exchanger 11 and the calorific value of the clean water discharged into the bathtub 2 is recovered by the bath water supplied into the cleaning cylinder 4. The temp. of the bath water in the cleaning cylinder 5 is so maintained as to attain the adequate range for cleaning by the microorganisms regardless of the temp. of the bath water in the bathtub 2. The cleaning of the bath water by the microorganisms is sufficiently executed even if the temp. of the bath water in the bathtub 2 is made lower than the temp. of the bath water in the cleaning cylinder 4 even in the cases exclusive of bathing. The necessary calorific value of the heater 8 is thus decreased.</p> |
