| 摘要 |
PCT No. PCT/EP88/00469 Sec. 371 Date Jan. 24, 1989 Sec. 102(e) Date Jan. 24, 1989 PCT Filed May 26, 1988 PCT Pub. No. WO88/09205 PCT Pub. Date Dec. 1, 1988.The invention refers to a process, a filter, as well as a device for the elimination of bacteria and/or viruses and/or fungi and/or spores and/or germs and/or allergens and/or pollutants and/or odors, etc from the breathing air by means of a filter consisting of one or several chemisorption mass layers. In order to avoid that biofilters which have been in operation for a longer time do not release fungi spores and bacteria under certain circumstances, the invention proposes that downstream of a biofilter, bulk material is used alternately as very strongly alkaline or very strongly acid chemisorption layers, or vice versa. As bulk material for the individual chemisorption mass layers coal coke of the type III or IV of crushed coke is used, with strongly alkaline and strongly acid chemisorption layers. The individual chemisorption layers are felt layers, which are impregnated with the corresponding liquids to be alkaline, acid and/or neutral, or vice versa, dried and then packed on top of each other to be used as chemisorption filters, whereby between the chemisorption mass layers hydrophobic water-repellant separating layers are inserted. In order to eliminate odors, the chemisorption mass layers consist of active carbon treated with propylene glycol. For the allergens-free humidification of the actual humidifier, upstream of the suction side a chemisorption filter device is provided, which is intended as an absolute barrier for flying allergens and at the same time a germ barrier, whereby after the device is switched off manually or automatically, a barrier is insured also on the outflow side by a bactericidal, fungicidal chemisorption filter.
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