Patent ID: 6174419
Filing Date: 2001-01-16
Classification: A61L,C02F,C25B

Abstract:
An electrolytic water producing apparatus comprising:a raw water supply device;a chloride solution supply device;a mixer connected to the raw water supply device and the chloride solution supply device for mixing raw water and chloride solution supplied from the respective devices;an electrolyzing device adapted to provide a voltage to electrodes forming an anode and a cathode, said electrolyzing device receiving a mixture of the raw water and chloride solution from the mixer and producing an acidic liquid on an anode side and an alkaline liquid on a cathode side by electrolyzing the mixture;a measuring device for measuring a concentration of hypochlorous acid contained in the acidic liquid produced on the anode side; anda control device means connected to the measuring device and the electrodes, said control device means adapted to periodically switching polarities of the electrodes for protecting the electrodes and controlling an electrolytic condition in the electrolyzing device with an inverse sawteeth pattern adapted for switching of the polarities so that a measured concentration of the hypochlorous acid formed at the anode side is substantially constant, said inverse sawteeth pattern including a gradual increase from a predetermined low value to a predetermined high value and a rapid decrease from the high value to the low value between a condition right after changing the polarity and a condition after a next change of the polarity.