UV bulb intensity control for water treatment system

Details UV bulb intensity control for water treatment system UV bulb intensity control for water treatment system

1993-02-11

1994-06-28

Drodge, Joseph W.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 97, 210192, 315310, 315DIG4, 422105, 4221863, B01D 1712, H05B 4138

Patent

active

053244230

ABSTRACT:
A control circuit for reducing current flow through the UV light bulb of a water purification unit when water is not flowing through the unit. In a first embodiment, the control circuit includes an RC shunt selectively connected in parallel with the UV bulb, thereby selectively adding a positive impedance in parallel with the negative impedance of the bulb. In a second embodiment, the control circuit includes an impedance selectively connected in series with the bulb ballast. In either embodiment, the impedance circuit is actuated in response to a water flow switch. When water is flowing through the unit, the impedance is removed so that full current is delivered to the bulb enhancing UV intensity. When water is not flowing through the unit, the impedance is added so that current flow is reduced.

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