AIR FILTERING APPARATUS WITH FILTERED AIR RECIRCULATION

摘要

A filtering apparatus comprising a timing device for establishing a cycle whereby filtered air is discharged to the environment instead of being recirculated during cleaning of the bags. The apparatus further comprises a filtered air by-pass device consisting of two flaps (8 and 9), i.e. one flap for filtered air recirculation and one for discharge to the environment, said flaps being actuated by a control device dependent on the timing device.