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US 5,670,094 AGranted
Method of and apparatus for producing ozonized water
AssigneeEbara Corporation
InventorsKenichi Sasaki, Takayuki Saito, Ken Nakajima, Mitsuru Imai
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AssigneeEbara Corporation
InventorsKenichi Sasaki, Takayuki Saito, Ken Nakajima, Mitsuru Imai
Estimating the term…
In an ozonized water producing apparatus in which a pressurized ozone gas generated by an electric discharge type ozonizer is dissolved in water to be treated through a porous hollow-fiber membrane, an infinite variable-speed control type pump is provided upstream of the hollow-fiber membrane to maintain the water pressure inside the hollow fibers higher than the ozone gas pressure and to control the water pressure and flow rate, and a control mechanism is provided to control the ozone concentration in the treated water on the basis of the ozone gas concentration. Thereby treated water containing neither tiny bubbles nor impurities is obtained, and the concentration, flow rate and pressure of the treated water are controlled at constant levels.
An ozonized water producing method in which a pressurized ozone gas generated by an electric discharge type ozonizer is dissolved in water to be treated through a hollow-fiber membrane, characterized in that a water pressure inside the hollow-fiber membrane is maintained higher than the pressure of the ozone gas supplied to the outside of the hollow-fiber membrane to prevent tiny bubbles and impurities from getting mixed in the water being treated, and an ozone concentration in treated water is controlled on the basis of the concentration of the ozone gas.
An ozonized water producing apparatus in which a pressurized ozone gas generated by an electric discharge type ozonizer is dissolved in water to be treated through a hollow-fiber membrane, characterized by comprising:
Dependencies are inferred from the claim text.