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...

F - Mech Eng,Light,Heat,Weapons

24

H

F24H 9/20 (2006.01) F24H 1/20 (2006.01)

Patent

CA 2570601

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 includes a current path from the power source to the heating element back to the power source, a switch connected in the current path, and a current sensor. The method includes initiating a heating state of the fluid-heating apparatus, initiating a non-heating state of the fluid-heating apparatus, applying a voltage to the heating element during the non-heating state, sensing a leakage current of the heating element during the application of the voltage, and determining a degradation of the heating element with the sensed leakage current.

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