Patent ID: 8160822

Claim:
An apparatus for measuring optimum water-quality and informing quality of water comprising: (a) an impurities-detecting part for detecting an amount of impurities of water; (b) a control part coupled with the impurities-detecting part, wherein the control part stores an initial optimum value, the optimum value indicating the optimum amount of the impurities of the water, the control part including, (b1) measurement means for measuring the amount of the impurities of the water which receives a signal for the amount of the impurities of the water from the impurities-detecting part and measures it, (b2) renewal time decision means for deciding whether it is a renewal time of the optimum value, (b3) comparison means for comparing the amount of the impurities of the water measured by the measurement means with the optimum value, and (b4) optimum-value renewal means for renewing the optimum value by the amount of the impurities of the water if the comparison result made by the comparison means is that the amount of the impurities of the water is smaller than the optimum value, if it is decided as the renewal time by the renewal time decision means; (c) informing part for informing the result of the comparison by the comparison means.