Heating unit for a vehicular fluid heater

G - Physics – 05 – D

Patent

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Details

G05D 23/24 (2006.01) B60S 1/48 (2006.01) F24H 1/12 (2006.01)

Patent

CA 2742888

The invention refers to a heating unit (9) for a vehicular fluid heater (3). The vehicular fluid heater (3) comprises a heating element, a pulsewidth control switching unit (32) which is connected to the heating element (20) and a control unit (31) which is connected to the switching unit (32) and which produces a control signal (33) within an adjustable pulsewidth. The pulsewidth of the control signal (33) produced by the control unit (31) depends on the actual temperature of the heating element (20), so that the control unit (31) in combination with the switching unit limits the temperature of the heating unit (9) to an adjustable target temperature (figure 11).

La présente invention concerne une unité de chauffage (9) pour réchauffeur de fluide pour véhicule (3). Le réchauffeur de fluide pour véhicule (3) comporte un élément chauffant, une unité de commutation de commande de durée d'impulsions (32) qui est connectée à l'élément chauffant (20) et une unité de commande (31) qui est connectée à l'unité de commutation (32) et qui produit un signal de commande (33) à l'intérieur d'une durée d'impulsions réglable. La durée d'impulsions du signal de commande (33) produit par l'unité de commande (31) dépend de la température réelle de l'élément chauffant (20), de sorte que l'unité de commande (31) en combinaison avec l'unité de commutation limite la température de l'unité de chauffage (9) à une température cible réglable.

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