Abstract: A ventilation system for a mobile structure, in particular a motor vehicle, includes: a variably adjustable filter device including at least one controllable, variable filter characteristic with regard to a pollutant class; means for collecting information about the air quality in the surroundings of the mobile structure and in particular information about the air quality in an interior of the mobile structure; and a control unit for varying filter characteristics of the filter device in a variable, in particular continuous, manner, on the basis of the information about the air quality.

Abstract: A filter element includes: a bellows including a pleated filter medium and edge strips bounding the bellows; and a functional space that adjoins the bellows and is arranged within the edge strips, having an interface between the bellows and functional space. The interface is provided with at least one cutout for receiving sensor elements and/or fragrancing elements.

Abstract: A filter arrangement for a mobile device includes at least one first filter element and at least one second filter element, which are arranged in an air duct of the mobile device. The at least one first filter element is a pleated filter and the at least one second filter element is an adsorption filter. The at least one first filter element and the at least one second filter element are separate and mounted in the air duct so as to be mutually spaced. The at least one first filter element includes at least one nonwoven layer. The at least one second filter element is a honeycomb filter including a plurality of channels which are delimited by channel walls.

Abstract: A supply air arrangement for a mobile device includes: at least one inlet; at least one air duct; at least one outlet; and a filtering arrangement comprising at least two filtering elements. A first filtering element and a second filtering element that is formed separately from the first filtering element are arranged in the air duct.

Abstract: An air treatment device for an airflow of an air conditioning system includes a treatment element having one or more passages extending in part or completely in a flow direction. The passages include fragrancing faces that extend in the flow direction and are designed to release one or more fragrant substances into an airflow that is flowing through.

Abstract: A ventilation insert for textiles, with at least one layer, covered at least partially by an absorption material and having ventilation openings, the openings being at least partially closeable via a liquid by swelling of the absorption material, obtainable by: a) treating a layer having ventilation openings with a mixture, containing a wetting agent, initiator, polymerizable monomer or oligomers, and a cross-linking agent, as a preliminary stage for the absorption material; and b) polymerizing the monomer or oligomer to form the absorption material while forming a bonded connection between the absorption material and the layer. The ventilation insert has a relatively low thickness, a low weight per unit area, and high flexibility permanently and independently of moisture after economical production, via one layer, self-sealingly closing ventilation openings, and containing the absorption material. The absorption material is connected to the layer by bonding, at least in some regions.

Abstract: A ventilation system for a mobile structure, in particular a motor vehicle, includes: a variably adjustable filter device including at least one controllable, variable filter characteristic with regard to a pollutant class; means for collecting information about the air quality in the surroundings of the mobile structure and in particular information about the air quality in an interior of the mobile structure; and a control unit for varying filter characteristics of the filter device in a variable, in particular continuous, manner, on the basis of the information about the air quality.

Abstract: A supply air arrangement for a mobile device includes: at least one inlet; at least one air duct; at least one outlet; and a filtering arrangement comprising at least two filtering elements. A first filtering element and a second filtering element that is formed separately from the first filtering element are arranged in the air duct.

Abstract: A filter arrangement for a mobile device includes at least one first filter element and at least one second filter element, which are arranged in an air duct of the mobile device. The at least one first filter element is a pleated filter and the at least one second filter element is an adsorption filter. The at least one first filter element and the at least one second filter element are separate and mounted in the air duct so as to be mutually spaced. The at least one first filter element includes at least one nonwoven layer. The at least one second filter element is a honeycomb filter including a plurality of channels which are delimited by channel walls.

Abstract: A filter element includes a first bellows which is produced from a first filter medium, in view of the object of providing a filter element which after some service life can be readily modified in such a manner that said filter element again achieves an adequate filtration effect, is characterized in that a second bellows which is produced from a second filter medium is provided, wherein the second bellows is inserted into a recess of the first bellows and the periphery of the second bellows is partly or completely surrounded by the first bellows or wherein the second bellows is placed onto the first bellows in such a manner that the recess is covered by the second bellows and the fold tips of the bellows are aligned with one another.

Abstract: A mobile purification device for purifying indoor air and/or fresh air, has a holder and a filter element having a particle-filtering and a gas-adsorbing region, the particle-filtering region having a filter medium and the filter element being received in the holder to purify indoor air and/or fresh air containing smoke and/or particles and is useful as a mobile purification device, filtering particle-polluted and/or smoke-polluted indoor air and/or fresh air as effectively as possible, with particulate, emitted contaminants being prevented as far as possible from being discharged from the gas-adsorbing region into a space, wherein the particle-filtering region faces a downstream side of the holder and in that the gas-adsorbing region faces an upstream side, which can be supplied with indoor air and/or fresh air polluted with smoke and/or particles.

Abstract: A ventilation insert for textiles, with at least one layer, covered at least partially by an absorption material and having ventilation openings, the openings being at least partially closeable via a liquid by swelling of the absorption material, obtainable by: a) treating a layer having ventilation openings with a mixture, containing a wetting agent, initiator, polymerizable monomer or oligomers, and a cross-linking agent, as a preliminary stage for the absorption material; and b) polymerizing the monomer or oligomer to form the absorption material while forming a bonded connection between the absorption material and the layer. The ventilation insert has a relatively low thickness, a low weight per unit area, and high flexibility permanently and independently of moisture after economical production, via one layer, self-sealingly closing ventilation openings, and containing the absorption material. The absorption material is connected to the layer by bonding, at least in some regions.

Abstract: A filter element includes a first bellows which is produced from a first filter medium, in view of the object of providing a filter element which after some service life can be readily modified in such a manner that said filter element again achieves an adequate filtration effect, is characterized in that a second bellows which is produced from a second filter medium is provided, wherein the second bellows is inserted into a recess of the first bellows and the periphery of the second bellows is partly or completely surrounded by the first bellows or wherein the second bellows is placed onto the first bellows in such a manner that the recess is covered by the second bellows and the fold tips of the bellows are aligned with one another.

Abstract: In respect of the object of specifying a filter element which can be used as an inertial separator and, while being of compact construction, can be used in small installation spaces, said filter element displaying a low level of flow resistance, the highest possible dust-holding capacity and the best possible separating-off action, a filter element which is configured in the form of an inertial separator, that is to say has means which separate off particles by deflection of a flow medium, is characterized in that the means comprise, or have, nonwoven fabric.

Abstract: A filter element includes a filter web pleated in an essentially zigzag manner and made, in particular, of a nonwoven material, for insertion into a holder such as a filter frame and/or a filter housing, having at least one end-positioned wall of an essentially flat design. The filter element includes at least one end face, viewed in the direction of the pleats. To achieve a tighter seal, the end face of the filter element is curved outward in a defined convex manner, and the filter web material is selected and/or its end face conditioned so that, when inserted into the holder, the end face of the filter web may be placed leak-tight against the end wall of the holder without corrugation under elastic pre-tension.

Abstract: A filter element, including a filter body having an inflow side and outflow side, the filter body being constructed in layers, at least one layer including granular adsorbents and at least one further layer including activated carbon fibers. The filter element may be used in a filter system which ensures optimum utilization of the load capacity of the filter element used in that a first layer, which includes activated carbon fibers is assigned to the inflow side and a second layer, which includes granular adsorbents, adjoins this layer on the outflow side. A filter system includes the filter element.

Abstract: An adsorption filter having at least one layer of activated carbon particles is, with regard to the object of refining an adsorption filter of the described type, to be refined in such a way that it has a distinctly improved penetration characteristic compared to conventional filters involving a configuration which is as simple and cost-effective as possible and that at least 20 percent by weight of the activated carbon particles have a particle size of less than 0.180 mm and that the total mass per unit area of activated carbon is between 100 g/m2 and 500 g/m2. The adsorption filter can provide a high spontaneous adsorption performance.

Abstract: A filter system in particular for filtering the fresh air supplied to the interior of a motor vehicle is described, including at least one particle-filtering area and at least one chemical filter area, the chemical filter area including an activated carbon filter. The particle-filtering area has a filter efficiency of T (0.3 ?m)?90%, measured according to DIN 71460/1 @ 300 m3/h using AC fine test dust and T (0.1 ?m)?60%, measured according to DIN 71460 @ 300 m3/h using NaCl as the test aerosol. The filter system is characterized by an optimized separation of diesel exhaust and in particular by a definitely improved odor reduction in the case of diesel odor.

Abstract: A filter element includes a filter web pleated in an essentially zigzag manner and made, in particular, of a nonwoven material, for insertion into a holder such as a filter frame and/or a filter housing, having at least one end-positioned wall of an essentially flat design. The filter element includes at least one end face, viewed in the direction of the pleats. To achieve a tighter seal, the end face of the filter element is curved outward in a defined convex manner, and the filter web material is selected and/or its end face conditioned so that, when inserted into the holder, the end face of the filter web may be placed leak-tight against the end wall of the holder without corrugation under elastic pre-tension.