| 摘要 |
PROBLEM TO BE SOLVED: To obtain a water-purifying device capable of efficiently finding a correct impurity removal ratio. SOLUTION: A filtering means including reverse osmosis membrane modules 9 and 10 is arranged at the main pipe 4. Tap water is made to flow to the main pipe 4 to separate clear water with reverse osmosis membranes, and the clear water is fed from a water inlet 45. The device comprises: a primary impurity concentration sensor 18 arranged on the upstream side of the filtering means and detecting the concentration of impurities in raw water; piping 25 for inspection connected to the downstream side of the filtering means; an electromagnetic stop valve 29 opening and closing the piping 25 for inspection; a second impurity concentration sensor 30 arranged at the piping 25 for inspection and detecting the concentration of impurities in the clear water; and a control part 56. The control part 56 opens the electromagnetic stop valve 29 every end of business hours, finds the removal ratio of the impurities from a difference between the concentration of the impurities in the tap water detected by the first impurity concentration sensor 18 and the concentration of the impurities in the pure water detected by the second impurity concentration sensor 30, and, in the case the removal ratio of the impurities is a prescribed value or lower, displays the effect on a display panel 55. COPYRIGHT: (C)2005,JPO&NCIPI
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