Fluid-heating apparatus, circuit for heating a fluid, and...

Details Fluid-heating apparatus, circuit for heating a fluid, and... Fluid-heating apparatus, circuit for heating a fluid, and...

H - Electricity

05

B

H05B 1/00 (2006.01) F24H 9/20 (2006.01) H05B 3/02 (2006.01)

Patent

CA 2570575

A fluid-heating apparatus for heating a fluid and method of operating the same. The fluid-heating apparatus includes a heating element for heating a fluid surrounding the heating element and a control circuit connected to the heating element and connectable to a power source. The control circuit is configured to determine whether a potential dry- fire condition exists for the heating element. The method includes applying a first electric signal to the heating element, detecting a first value of an electrical characteristic during the application of the first electric signal, applying a second electric signal to the heating element, applying a third electric signal to the heating element, detecting a second value of the electrical characteristic during the application of the third electric signal; and determining whether a potential dry-fire condition exists based on the first and second values.

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