Diagnostic system for a cooking appliance

F - Mech Eng,Light,Heat,Weapons – 24 – C

Patent

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Details

F24C 7/08 (2006.01) G01M 99/00 (2011.01) G05D 23/19 (2006.01) H05B 1/02 (2006.01)

Patent

CA 2235999

The diagnostic system (120) of the present invention monitors and accumulates the thermal signatures or characteristics during at least one operational mode of the cooking appliance (105). These thermal signatures or characteristics are collected - through the same temperature sensor (115) used to regulate the temperature of the cooking appliance (105) - and then stored in, for example, a look-up table. Advantageously, this may be accomplished without the need of special sensors or interface boards. The thermal signatures or characteristics may include first order or higher order temperature gradients, as well as temperature profiles. The stored thermal signatures provide a baseline from which the diagnostic system can detect and identify whether the cooking appliance is working under normal operating conditions.

Ce système de diagnostic surveille et mémorise des signatures ou caractéristiques thermiques pendant un mode de fonctionnement au moins d'un ustensile de cuisson. Ces signatures ou caractéristiques thermiques sont recueillies, par le même capteur de température que celui servant à régler la température de l'ustensile, puis mémorisées dans un tableau de consultation par exemple. L'avantage réside en ce que ceci évite le recours à des capteurs spéciaux ou à des circuits d'interface. Ces signatures ou caractéristiques thermiques peuvent inclure des gradients de température du premier ordre ou d'ordre plus élevé ainsi que des profils de température. Les signatures thermiques mémorisées donnent une base à partir de laquelle ce système de diagnostic peut détecter et déterminer si l'ustensile de cuisson fonctionne dans des conditions normales.

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