Device for the distribution of ventilation air in the passenger compartment of a motor vehicle

A device for the distribution of ventilating air in the passenger compartment of a motor vehicle, having, downstream of a ventilating flap mounted in rotation about a transverse axis in a distribution compartment of a heating, ventilation and/or air conditioning assembly, a central ventilating duct and at least one lateral duct which are separated from the central duct by at least one partition perpendicular to the axis of rotation of said ventilating flap and are intended to deliver air to at least one lateral ventilating outlet, said ventilating flap being capable of assuming several angular positions as a function of the operating modes of said assembly, in particular an open position in the operating modes of ventilating and ventilating/heating the feet, in which modes an airflow supplies said ducts, and closed positions in the operating modes of heating the feet, deicing/heating the feet and deicing, in which modes said ventilating flap closes off the inlets of said ducts and said ducts are supplied only with air leaks, which device further includes means for supplying the lateral duct or ducts with an additional airflow which varies as a function of the selected operating mode.