Electrical heating device for motor vehicles
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsPhilipp Hofmann, Patrick Oswald, Peter Satzger
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Abstract
A radiant heating device for producing radiant heat in a passenger compartment of a motor vehicle includes a heating surface for emitting heat radiation, a heating element for providing heating power, a first temperature sensor for detecting a first temperature in a specific spot and for providing a corresponding first temperature indication, and a second temperature sensor for detecting a second temperature on the surface and for providing a corresponding second temperature indication. In order to detect a local over-heating of the heating surface, a difference between the two temperature indications is determined. In the event of a defect, a protective operating mode is then selected.
Claims12
A radiant heating device for providing radiant heat in a passenger compartment of a motor vehicle, comprising:
- a heating surface for outputting thermal radiation;
- a first temperature sensor for detecting a first temperature at a point of the heating surface and for providing a corresponding first temperature indication;
- a second temperature sensor for detecting a second temperature over an area of the heating surface and providing a corresponding second temperature indication;
- and
- a heating element for providing heat output to the point of the heating surface and the area of the heating surface,
- wherein the point of the heating surface lies within the area of the heating surface, wherein the second temperature sensor for detecting the second temperature is arranged two-dimensionally between the heating element and the heating surface, in order to provide the second temperature indication in a way corresponding to a distribution of local temperatures of the heating surface.
Dependencies are inferred from the claim text.