Patent ID: 7329312
Filing Date: 2008-02-12
Classification: B01F,C02F

Abstract:
1. An apparatus for supplying water containing a dissolved gas which comprises: (a) an apparatus for producing water containing a dissolved gas comprising: (i) a degassing apparatus, (ii) an apparatus for dissolving a gas disposed at a position downstream of the degassing apparatus which comprises a flowmeter for measuring a flowrate of degassed pure water or ultra-pure water and outputting a signal of a value obtained by the resultant measurement, said flowmeter being disposed at a position between the degassing apparatus and said apparatus for dissolving a gas, (iii) a mechanism for controlling a flowrate which controls an amount of a gas to be dissolved into the pure water or the ultra-pure water based on an input signal from the flowmeter and (iv) a means for adjusting an amount of water which adjusts an amount of the pure water or the ultra-pure water supplied to the apparatus for dissolving a gas; and (b) an apparatus for supplying the water containing a dissolved gas comprising: (i) a water tank which receives the water containing a dissolved gas in an excessive amount which is not used at a point of use, (ii) a piping system through which the water containing a dissolved gas flows from the water tank towards the point of use and the water containing a dissolved gas in an excessive amount returns to the water tank, (iii) a piping system for supplying the water containing a dissolved gas which supplies the water containing a dissolved gas obtained in the apparatus for producing the water containing a dissolved gas to the water tank; and (iv) a controlling means for adjusting an amount of water based on a water level in the water tank.