Prevention or reduction of scaling on a heater element of a water heater
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United States of America Patent
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May 29, 2018
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app pub date -
Jul 19, 2011
filing date -
Jul 22, 2010
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Abstract
The invention provides a method of using a water heater arranged for heating an aqueous liquid wherein the water heater comprises a heating element to heat aqueous liquid in the water heater. The method comprises (a) heating aqueous liquid in the water heater with the heating element), wherein the heating element is in contact with the aqueous liquid; and (b) applying a first AC voltage between the heating element and a counter electrode, and applying a DC voltage between the heating element and the counter electrode, wherein the DC voltage is at least 0.5 V, and wherein the heating element is chosen as positive electrode.
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