| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water quality purifying device in which a filter can be washed at a proper washing time. SOLUTION: There are provided a filter 31, a pump 61 to effect a purifying treatment by generating a water flow through the filter 37, and a washing device 62 to wash the filter 37, and a dissolved oxygen amount measuring means 65 is provided at least in a flow of water passed through the filter 37 by the pump 61, and a control means which judges the washing time to wash the filter 37 by means of the washing device 62 based on the amount of microbe carried by the filter 37 which is estimated from the values measured by the means 65 is provided.</p> |
