Patent ID: 6507162
Filing Date: 2003-01-14
Classification: B60H,G05B,Y10S

Abstract:
A device for distributing a flow of air in at least one duct of an installation for heating, ventilating and/or air conditioning the passenger compartment of a motor vehicle, having:a flap suitable for being moved between a position for closing and a position for opening the duct, an electric motor for moving the flap, a voltage-supply source, and a power-regulation module, wherein the power-regulation module comprises a first terminal connected to a first terminal of the motor, wherein the voltage-supply source is suitable for being applied between a second terminal of the regulation module and the second terminal of the motor, and wherein that the regulation module is configured so as to adjust the strength of the current passing through the motor, at substantially constant voltage-supply source, to a value below a threshold value when the flap is immobile, and wherein the voltage-supply source is configured to deliver a polar voltage, and wherein the regulation module includes a changeover circuit suitable for supplying the motor with a current which is a function of the polarity of the voltage-supply source, and wherein the regulation module includes first and second positive-temperature-coefficient resistors, mounted in parallel and connected respectively to first and second diodes, inverted and each mounted in series with the resistors.