Abstract: The back pressure of the air duct of the public flue exhaust system is complex and changes greatly, and the traditional range hood cannot automatically match the optimal working mode. By designing an effective air system of the range hood to effectively solve the impact of the back pressure of the air duct on the effect of the range hood from three aspects: algorithm, sensor and air duct, and at the same time effectively reduce the noise during the use of the range hood.

Key words: Range hood, Effective wind, Back pressure of air duct, Smoke exhaust effect