| 摘要 |
The invention relates to a filter or catalytic-converter device in which the greatest possible amount of a fluid medium in a housing is brought into contact with the surface of a device, in the housing, with openings in the direction of flow of the medium. The device comprises fixed parts (24; 124; 224) and moving parts (22; 122; 322), and the fluid medium is guided in such a manner that it flows alternately through fixed parts (24; 124; 224) and moving parts (22; 122; 322) of the device. The invention also relates to a catalyticconverter through which a fluid medium, preferably gas, is brought into contact with a catalytic substance, this medium flowing through a carrier structure (409; 425; 439) for the catalytic substance. The carrier structure (409; 425; 439) comprises grids or perforated plates which carry the catalytic substance and through which the fluid medium flows, and a drive device (408; 432) is provided which moves the grids or perforated plates at right angles to the direction of flow of the fluid medium.
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