AIR-FILTERING DEVICE, METHOD AND DEVICE FOR THE PRODUCTION THEREOF AND AN AIR CIRCULATION SYSTEM FOR A MOTOR VEHICLE

摘要

The inventive air-filtering device comprises an air channelling frame (12) arrangeable in an air channelling housing. Said frame contains a filtering medium (14) and comprises at least one air channelling wall (12D, 12L) delimited by an internal surface (FI) jointing to the filtering medium (14) and an external surface (FE) for interacting with the additional wall of the housing. Said external surface (FE) of the channelling wall (12D, 12L) comprises a projection (18D, 18L) which is embodied in an integral manner with said channelling wall (12D, 12L) and contactable with the additional wall of the housing in such a way a sealing joint is formed between the air channelling frame (12) and the housing and the internal surface (FI) of the channelling wall (12D, 12L) comprises a depression (19) substantially complementary to said projection (18D, 18L). In the preferred embodiment the guiding wall (12D, 12L) is made of a heat-deformable polymer, in particular a polypropylene, polyethylene or polyurethane synthetic foam.