Regulation system for regulating air flow in conduit for ventilation, has pressure chamber provided with air inlet, where regulating element is movable under effect of air pressure in pressure chamber, in rotation about longitudinal axis

摘要

The system (S) has a conduit (2) centered about a cylindrical longitudinal axis (X-X'), and a regulating element (4) mounted in the conduit relative to a fixed part (10) of the conduit, where the regulating element is movable to change a passage section of air according to the pressure of the air passing through the conduit. A pressure chamber of variable volume is provided with an air inlet (114) that is open to an inflow side (F1) of the air in the conduit. The regulating element is movable under the effect of the air pressure in the pressure chamber, in rotation about the longitudinal axis.