Air filter for the interior air of cabins of vehicles, agricultural, construction, and work machines
The invention relates to an interior air filter element ( 10 ) for a driver's cabin ( 302 ) of agricultural and work machines, particularly having sprinkling or spraying devices for pesticides or fertilizers including a filter body ( 12 ) having an adsorption filter region ( 50 ) and a fine filter region ( 80 ) particularly for separating aerosols, wherein the filter body 12 is designed as a winding body having at least one winding layer.
1. An interior air filter element of a driver's cabin of agricultural and working machines adapted to filter air having dust, and/or harmful gases and/or aerosols from spraying or sprinkling devices for pest control media or fertilizers, comprising:
a wound filter body wound about an axis and having a hollow interior forming an axial flow channel, the wound filter body having:
a plurality of adsorption filter layers wound about the axis forming the hollow interior, the plurality of adsorption filter layers including:
at least one winding layer of an immobilized adsorber agent having activated carbon medium;
at least one additional winding layer having at least one additional adsorber agent selected from the group consisting of: aluminum oxide, copper oxide, manganese oxide, and molecular sieves from the group consisting of MOFs, organo-clays, nanoclay(s), silica gel, silicon oxide, zeolites, and mixtures of these additional adsorber agents;
wherein the winding layers of the plurality of adsorption filter layers include a carrier layer on which the adsorber agents are arranged;
a HEPA fine filter layer for removal of aerosols, the HEPA fine filter layer arranged on and surrounding a radially outer side of the plurality of adsorption filter layers;
a particle filter layer as a pre-filter, arranged on and surrounding a radially outer side of the HEPA fine filter layer for removal of particles before they reach the HEPA fine filter layer;
wherein the particle filter layer is arranged upstream of the HEPA fine filter layer which is upstream of the plurality of adsorption filter layers;
wherein the filter body is a wound body having at least one wound layer and surrounds a central flow area.
2. The interior air filter element according to claim 1 , wherein
a filter medium is provided as the fine filter region that is unfolded or folded in the shape of a zigzag and made of a glass fiber medium or a synthetic HEPA filter medium;
wherein the filter medium is a glass fiber medium having one or two cover layers made of a spunbonded fabric.
3. The interior air filter element according to claim 2 , wherein
the filter medium is used as the prefilter in the particle filter is unfolded or folded in a zigzag pattern and made of cellulose, plastic foam, or a nonwoven.
4. The interior air filter element according to claim 1 , wherein
the plurality of adsorption filter layers is a partially finished product including at least one carrier layer and at least one fixed adsorber layer having at least one adsorbent.
5. The interior air filter element according to claim 1 , wherein
the wound body is wound about and on a tube element that remains in the wound body as a support body.
6. The interior air filter element according to claim 3 , wherein
the filter medium of the plurality of adsorption filter layers and/or the HEPA fine filter layer is/are integrated into the wound body as a carrier layer or an additional layer arranged on carrier layer.
7. The interior air filter element according to claim 3 , wherein
the plurality of adsorption filter layers and/or the HEPA fine filter layer and/or the particle filter layer each forms a separate partial filter element.
8. The interior air filter element according to claim 1 , further including
seal ring for separating an unfiltered side from a filtered side of the filter element when installed in a filter housing.
9. The interior air filter element according to claim 8 , wherein
the seal ring is formed by a sealing profile made of any of: a polymer, a closed-pore foam applied by foaming, or a polyurethane foam.
10. The interior air filter element according to claim 1 , wherein
a hydrophobic activated carbon is used as the adsorbent.
11. The interior air filter element according to claim 1 , wherein
the filter body is configured and adapted to be flowed through exclusively in a radial direction.
12. The interior air filter element according to claim 3 , wherein
the plurality of adsorption filter layers, the HEPA fine filter layer and the particle filter layer are disposed resting directly one a top the other within the interior air filter element.
13. An interior air filter system for a driver's cabin of agricultural and working machines, including
an interior air filter element according to claim 3 ;
a housing into which the filter element is received;
wherein the housing includes an air inlet and an air outlet in which the interior air filter element separates the inlet side from the outlet side in a sealing fashion.
14. A method for cleaning air contaminated with harmful gases and/or aerosols and/or solid particle dust in the supply air of agricultural or working machines, including:
providing a filter element according to claim 1 ;
supplying unfiltered air to an interior air filter element;
removing of dusts made of solid particles from the unfiltered air by means of a prefilter region;
removing toxic gases by means of an adsorption filter region; and
removing aerosols by means of the fine filter region;
wherein the fine filter region is a HEPA fine filter region.