The invention relates to an electric heater (1) for heating fluid streams with a heating element (2) and a control device (3) for controlling a heat output produced by the heating element (2), wherein the heating element (2) has an inductance (L_RHK) that changes on the basis of the temperature, and wherein an overheating detection device (4) is provided that is configured to sense a change in the current (Iheat) flowing through the heating element (2) caused by a change in the inductance (L_RHK) and to compare said sensed change with a previously defined limit value and to determine overheating in the electric heater (1) in the event of the limit value being exceeded. The invention further relates to a method for detecting overheating in such an electric heater (1).
ELEKTRISCHER HEIZER UND VERFAHREN ZUM ERKENNEN EINER ÜBERHITZUNG EINES SOLCHEN ELEKTRISCHEN HEIZERS
ELECTRIC HEATER AND METHOD FOR DETECTING OVERHEATING IN SUCH AN ELECTRIC HEATER
DISPOSITIF DE CHAUFFAGE ÉLECTRIQUE ET PROCÉDÉ DE DÉTECTION DE SURCHAUFFE D'UN TEL DISPOSITIF DE CHAUFFAGE ÉLECTRIQUE
2023-09-06
Patent
Electronic Resource
German
IPC: | H05B ELECTRIC HEATING , Elektrische Heizung / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |
ELEKTRISCHER HEIZER UND VERFAHREN ZUM ERKENNEN EINER ÜBERHITZUNG EINES SOLCHEN ELEKTRISCHEN HEIZERS
European Patent Office | 2018
|European Patent Office | 2020
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