APPARATUS FOR PRODUCTION OF NITROGEN-DISSOLVED WATER

PROBLEM TO BE SOLVED: To provide an apparatus for production of nitrogen-dissolved water permitting production of water with the concentration of dissolved nitrogen managed conveniently and precisely. SOLUTION: The apparatus has (A) a membrane type gas dissolving device equipped with a water chamber and a gas chamber divided with a gas-permeable membrane, (B) a deoxidized water supply pipe supplying deoxidized water to the water chamber, (C) a gas-dissolved water discharging pipe discharging gas-dissolved water from the water chamber, (D) a nitrogen supply pipe supplying nitrogen to the gas chamber, (E) a nitrogen supply adjusting means adjusting the amount of nitrogen supplied to the gas chamber and (F) a manometer measuring the pressure of the gas chamber. The apparatus adjusts the amount of supplied nitrogen with the nitrogen supply adjusting means according to measurements of the manometer in order to keep the pressure of the gas chamber at a predetermined value. COPYRIGHT: (C)2006,JPO&NCIPI