Air mix valve comprising: - a wall delimiting an internal volume of the valve and having at least three openings, - at least one airflow-regulating device comprising: ∘ at least two shutters (26, 33) placed in the internal volume of the valve, at least one of which, named aerodynamic shutter, is arranged with respect to one of the openings so as to be able to receive an airflow passing through this opening, ∘ a linking mechanism between at least two shutters (26, 33) of the at least two shutters, - at least one of the shutters being guided with respect to the wall, each of the shutters (26, 33) being arranged and guided so as to be able to be caused to move with respect to the wall, wherein: - at least one airflow-regulating device, named aero-controlled regulation device of said at least one airflow-regulating device, is mounted to be freely movable with respect to the wall, so as to be able to be displaced exclusively under the effect of variations in at least part of the airflow passing through at least some of the openings, - at least one aerodynamic shutter, named profiled shutter, of the at least one aerodynamic shutter, of at least one aero-controlled regulation device, has the shape of a blade profile comprising a leading edge and a trailing edge and having a non-constant thickness between its leading edge and its trailing edge, so as to be able to be caused to move by the aerodynamic energy of at least one airflow (42, 43) which is incident on this profiled shutter, - at least one shutter, named linked shutter, of the said at least aero-controlled regulation device, is connected to at least one profiled shutter of this aero-controlled regulation device by a linking mechanism arranged such that such a linked shutter is caused to move by a movement of at least one profiled shutter to which it is connected by the linking mechanism, and wherein at least one profiled shutter is cambered such that it can form a convergent/divergent airflow passage between the shutter and the wall. - a wall delimiting an internal volume of the valve and having at least three openings, - at least one airflow-regulating device comprising: ∘ at least two shutters (26, 33) placed in the internal volume of the valve, at least one of which, named aerodynamic shutter, is arranged with respect to one of the openings so as to be able to receive an airflow passing through this opening, ∘ a linking mechanism between at least two shutters (26, 33) of the at least two shutters, ∘ at least two shutters (26, 33) placed in the internal volume of the valve, at least one of which, named aerodynamic shutter, is arranged with respect to one of the openings so as to be able to receive an airflow passing through this opening, ∘ a linking mechanism between at least two shutters (26, 33) of the at least two shutters, - at least one of the shutters being guided with respect to the wall, each of the shutters (26, 33) being arranged and guided so as to be able to be caused to move with respect to the wall, - at least one airflow-regulating device, named aero-controlled regulation device of said at least one airflow-regulating device, is mounted to be freely movable with respect to the wall, so as to be able to be displaced exclusively under the effect of variations in at least part of the airflow passing through at least some of the openings, - at least one aerodynamic shutter, named profiled shutter, of the at least one aerodynamic shutter, of at least one aero-controlled regulation device, has the shape of a blade profile comprising a leading edge and a trailing edge and having a non-constant thickness between its leading edge and its trailing edge, so as to be able to be caused to move by the aerodynamic energy of at least one airflow (42, 43) which is incident on this profiled shutter, - at least one shutter, named linked shutter, of the said at least aero-controlled regulation device, is connected to at least one profiled shutter of this aero-controlled regulation device by a linking mechanism arranged such that such a linked shutter is caused to move by a movement of at least one profiled shutter to which it is connected by the linking mechanism,