| 摘要 |
<p>This invention relates to an apparatus for displaying the purifying efficiency of a water purifier. The apparatus is adapted to compare the quality of supplied water with that of purified water and then display the result. The apparatus comprises a supply water quality sensing element for sensing an amount of pollutant substances contained in the supplied fresh water and produced water quality sensing element for sensing an amount of pollutant substances contained in purified water that has passed though filters in the purifier. An amplifying unit is included for amplifying weak signals sensed by the sensors. A subtractor receives the signals obtained from the amplifying unit and derives a difference between the amplified signals. A divider is supplied for dividing the output signal from the subtractor by the sensed and amplified signal from the supply water quality sensing element, and an adjusting unit is provided for adjusting erroneous values to obtain the correct results of the subtractor and divider. A control unit derives the purifying efficiency based upon the signal output from the divider and, from the above derived result, outputs a signal indicating the purifying efficiency and the purified state of the purified water. A displaying unit receives the output signal from the control unit via a driving circuit, and displays the purifying efficiency and the purified state.</p> |
