Method and apparatus for monitoring operation of electrical...

Details Method and apparatus for monitoring operation of electrical... Method and apparatus for monitoring operation of electrical...

2005-09-06

2005-09-06

Lieu, Julie Bichngoc (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S657000, C340S661000, C340S663000, C324S510000, C324S511000

Reexamination Certificate

active

06940413

ABSTRACT:
Discloses is a method and a corresponding apparatus for monitoring operation of electrical household appliances (such as a freezer). The method includes checking the temperature inside the freezer on a periodical basis and comparing with a de-frosting temperature. A critical condition is detected and recorded when the temperature inside the freezer stays over the de-frosting temperature for a period longer than a threshold value. In this way, when a user returns home after several days of absence, he or she is informed whether the food has been de-frozen and then frozen again because of a outage in the power supply network.

REFERENCES:
patent: 4429576 (1984-02-01), Norris
patent: 6526516 (2003-02-01), Ishikawa et al.

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