Filter for sorption and desorption of air supplied to passenger compartment

摘要

The support grid comprises an expanded metal (2) with grid bridging sections (3) forming an angle with the grid plane. Preferred Features: The structure is a multilayer (12-18) of expanded metal sheets in direct contact with each other. They are alternatively separated by spacers. The first layer in the airflow are electrically heated. Insulation intervenes between layers. Layers are connected in parallel or series arrangement. Layers in contact are adhered or soldered together. Layers, if appropriate with spacers, are tensioned together. Successive layers have differing grid bridging section orientation. They are preferably orientated by rotation through 90 deg with respect to each other. The support structure is located in a plastic casing, preferably of high temperature-resistant plastic. Variations on the foregoing principles are also described. An absorbent coating on the grids is optimized for selective removal of various gases. The first layer removes moisture and/or acid gases. A later layer removes hydrocarbons, especially from petrol.