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Integrated monitor and control system for continuously monitoring and controlling pH and free halogen in swimming pool water
| Details |
Inventors: Wall, Frederick;
Assignee: Paddock of California, Inc. (Rock Hill, SC)
Primary Examiner: Wyse; Thomas G.
Assistant Examiner: Mukai; R. G.
Attorney, Agent or Firm:
An integrated monitor and control system for continuously monitoring and controlling pH and free halogen concentration in swimming pool water is provided, comprising, in combination, a first electrochemical flow cell having two electrodes and through which swimming pool water flows, giving rise to an electric potential between the electrodes in proportion to hydrogen/hydroxyl ion concentration in the pool water; means for measuring the electric potential across the electrodes in a manner correlated with pH of the pool water; a second electrochemical flow cell having two electrodes and through which swimming pool water flows giving rise to an electric potential between the two electrodes in proportion to the oxidation/reduction potential of the pool water; means for measuring the electric potential across the electrodes in a manner correlated with halogen concentration in the pool water; a first operational amplifier in electric connection with the first cell and arranged to respond to a pH outside a predetermined range and give a signal; first means responsive to the signal to adjust alkali or acid content of the pool water to restore pH to within the predetermined range; a second operational amplifier in electric connection with the second cell and arranged to respond to a halogen concentration outside a predetermined range and give a signal; second means responsive to the signal to adjust halogen concentration in the pool water to restore halogen concentration to within the predetermined range; and means for circulating pool water to, through and from each electrochemical cell and to and from a swimming pool water supply. |
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DETAILED DESCRIPTION Having regard to the foregoing disclosure, the following is claimed as the inventive and patentable embodiments thereof: 1.
A swimming pool system having pool water monitored for independent and concomitant control of halogen concentration and pH, comprising, in combination, a swimming pool; an integrated monitor and control system for continuously monitoring and independently controlling pH and free halogen in swimming pool water; and line connections for circulating swimming pool water flow therebetween; the monitor and control system comprising, in combination, a first electrochemical flow cell having two electrodes and through which swimming pool water flows, giving rise to an electric potential between the electrodes in proportion to hydrogen/hydroxyl ion concentration in the pool water; means for measuring the electric potential across the electrodes in a manner correlated with pH of the pool water; a second electrochemical flow cell having two electrodes and through which swimming pool water flows giving rise to an electric potential between the two electrodes in proportion to the oxidation/reduction potential of the pool water; means for measuring the electric potential across the electrodes in a manner correlated with halogen concentration in the pool water; a first operational amplifier in electric connection with the first cell and arranged to respond to a pH outside a predetermined range and give a first signal; a first means responsive to the first signal to adjust alkali or acid content of the pool water to restore pH to within the predetermined range; a second operational amplifier in electric connection with the second cell and arranged to respond to a halogen concentration outside a predetermined range and give a second signal; second means responsive to the second signal to adjust halogen concentration in the pool water to restore halogen concentration to within the predetermined range; and means for circulating pool water to, through and from each electrochemical cell and to and from a swimming pool water supply
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