Back to results
US 6,888,110 B2Granted
Method and device for detecting heating processes
AssigneeE.G.O. Elektro-Geraetebau GmbH
InventorsMartin Baier, Wolfgang Wittenhagen, Ralf Dorwarth
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeE.G.O. Elektro-Geraetebau GmbH
InventorsMartin Baier, Wolfgang Wittenhagen, Ralf Dorwarth
Estimating the term…
A method and the associated device for detecting cooking or boiling processes in a glass ceramic hob are described, to which power is supplied by a power supply by means of a heating element and said power is transmitted to the cooking vessel standing thereon. During a cooking process a temperature profile of the hob is measured and evaluated. The temperature profile is evaluated after ending the power supply and for evaluation purposes a temperature profile gradient is determined. During evaluation, a normal cooking or boiling process is detected if the gradient exceeds a predetermined threshold. During evaluation, a disturbed or faulty cooking or boiling process is detected if the gradient is equal to or smaller than a predetermined threshold. Such a disturbed or faulty cooking or boiling process can arise through the cooking vessel boiling dry or empty.
A method for detecting a heating process in a hob, said hob having a cover and a heater beneath said cover for supplying power to a cooking or boiling vessel being placed on said cover, said power supply taking place at intervals and during a heating process a cover temperature profile is measured and evaluated, wherein said temperature profile after ending said power supply interval is detected and evaluated and for evaluation purposes a temperature profile gradient is determined and a threshold is determined, wherein during evaluation a normal heating process is detected if said temperature profile gradient exceeds said threshold and during evaluation a faulty heating process is detected if said temperature profile gradient is equal to or smaller than said threshold.
Device for detecting a heating process in a hob, which has a cover and a heater beneath said cover for power supply to a cooking or boiling vessel placed on said cover, said power supply taking place at intervals and a control means is provided for said heater, said control means being constructed for evaluating a measured temperature profile and a temperature sensor is provided on said hob and it measures a temperature profile of said cover during a heating process, wherein said control means is constructed in such a way that it evaluates said temperature profile after ending said power supply and for evaluating purposes determines a gradient of said temperature profile, whilst during evaluation said control means detects a normal heating process if said gradient exceeds a predetermined threshold, and detects a faulty heating process if said gradient is equal to or smaller than a predetermined threshold.
Dependencies are inferred from the claim text.