Patent ID: 8097130
Filing Date: 2012-01-17
Classification: C02F

Abstract:
1. An integrated water treatment system for sanitizing the water in a water system and reducing scaling, comprising: an electrolytic cell through which water containing a dissolved electrolyte is pumped, the electrolytic cell including an electrode set comprising a plurality of flat plates, a housing supporting the electrode set and configured for mounting in a recirculating water flow path of the water system, and a water flow path portion within the housing through which water to-be-treated flows from an inlet side of the housing to an outlet side of the housing; an electronic control system coupled to the electrolytic cell, said system adapted to provide a drive current to the cell to generate a sanitizer by electrolysis; said control system further adapted to apply a time varying voltage drive to said cell to reduce scaling build-up, said time varying voltage drive having a frequency of at least 1 Hz; and wherein the control system is a single microprocessor-based control system adapted to provide a composite signal to the cell which is a composite of a constant current source drive and said time-varying voltage drive, and wherein the electronic control system includes a microprocessor; the system further comprising a DC power source providing a DC potential difference between a first node and a second node, and wherein said electronic control system comprises a plurality of solid state switches coupling the DC power source to the cell, the switches being controlled by the electronic control system, and wherein the microprocessor is adapted to execute an algorithm to control the switches to provide a variable pulse width modulated DC-to-DC constant current source function.