Apparatus and method for detecting condition of a heating...

Details Apparatus and method for detecting condition of a heating... Apparatus and method for detecting condition of a heating...

2006-07-28

2010-02-23

Robinson, Daniel L (Department: 3742)

Electric resistance heating devices

Heating devices

Immersion heater details

Reexamination Certificate

active

07668445

ABSTRACT:
A control for an electric water heater detects a condition of a heating element when the heating element is not being energized. A switching module is operable to interrupt power to the heating element, which de-energizes the heating element. A detector module detects the condition of the heating element when the heating element is de-energized. The detector module senses current flowing through the heating element and generates a detection signal that is indicative of the current.

REFERENCES:
patent: 4634834 (1987-01-01), Lupoli et al.
patent: 4929930 (1990-05-01), Rezabek
patent: 5149399 (1992-09-01), Kishi et al.
patent: 5304286 (1994-04-01), Palmer
patent: 5504306 (1996-04-01), Russell et al.

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