Lower nozzle for a heating/ventilation and/or air-conditioning appliance for the passenger compartment (cockpit) of a motor vehicle

摘要

The lower nozzle (10) comprises an internal skirt (16) delimiting a central passage (18) and an external skirt (20) coaxial with the internal skirt (16) and delimiting an annular passage (22) for splitting an entering airflow (FE) between a central airflow (FC) and an annular airflow (FA), the cross-sectional area of the annular passage (FA) increasing progressively in the direction of flow of the annular airflow (FA). Thus a stepped speed gradient is obtained at the outlet of the nozzle, this reducing the turbulence and the noise level.