EP4665476A1 - Filterelement und filtersystem - Google Patents
Filterelement und filtersystemInfo
- Publication number
- EP4665476A1 EP4665476A1 EP24701803.9A EP24701803A EP4665476A1 EP 4665476 A1 EP4665476 A1 EP 4665476A1 EP 24701803 A EP24701803 A EP 24701803A EP 4665476 A1 EP4665476 A1 EP 4665476A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- medium
- filter
- filter element
- fluid
- closing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/522—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with specific folds, e.g. having different lengths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/525—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes
Definitions
- the invention relates to a filter element for filtering a fluid, in particular air, as well as a filter system for filtering a fluid, in particular air, with a filter element and a method for producing a filter element for filtering a fluid, in particular air.
- Adsorption filters are used in motor vehicles, for example, to adsorb fuel vapors from the fuel tank and are arranged in tank ventilation lines, for example, to prevent unwanted emissions of hydrocarbons through the ventilation line into the environment.
- Activated carbon for example, can be used as an adsorbent, which adsorbs the hydrocarbons and thus fixes them.
- the activated carbon in such an adsorption filter is usually in the form of granules, honeycombs, pellets or compressed granules.
- Previously known activated carbon elements for filtering air have a flat or round shape.
- the elements are made from semi-finished products, such as fleece with activated carbon coating. Wound layers, round layered layers, flat or folded activated carbon media are used as the basis for such elements.
- DE 10 2010 019 046 A1 discloses a filter layer with a flat and a connected corrugated filter sheet with an additional corrugated filter sheet, the two corrugated filter sheets having different corrugations, in particular amplitudes and/or wavelengths.
- Activated carbon is preferably filled into each corrugation in the corrugations of the additional corrugated filter layer.
- Granular activated carbon and particularly preferably finely granulated or dusty activated carbon are used.
- Such dusty activated carbon can under certain circumstances be produced as a waste product in other areas of application.
- Activated carbon dust has a significantly larger surface area compared to granular activated carbon or activated carbon in pellet form, which can increase the adsorption capacity.
- the corrugations of the first corrugated filter sheet located between the corrugations filled with dusty activated carbon as an adsorbent are also closed at either one or the other longitudinal end.
- An object of the invention is to provide a filter element for filtering a fluid, in particular air, which can be produced in a favorable design.
- a further task is to create a filter system with a filter element which can be manufactured in an inexpensive design.
- a further object is to provide a method for producing such a filter element.
- a filter element for filtering a fluid, in particular air with at least one filter medium body with a flowable medium arranged transversely to a flow direction of the fluid, with a raw-side inlet surface and a clean-side outlet surface, wherein at least one region between the inlet surface and the outlet surface is filled with an adsorbent, in particular with particulate or dust-like activated carbon, and is arranged in intermediate spaces of the medium through which the flow can pass, wherein the region is closed off at a peripheral edge of the inlet surface and/or the outlet surface with a fluid-permeable closing medium, in particular a spunbonded nonwoven.
- a filter system for filtering a fluid in particular air
- a filter housing which has at least one inlet for the inflow of the fluid flow and at least one outlet for the outflow of the cleaned fluid flow
- a filter element arranged in the filter housing between a raw side and a clean side so as to be exchangeable for filtering the fluid
- at least one filter medium body with a medium that can be flowed through and arranged transversely to a flow direction of the fluid, with an inlet surface on the raw side and an outlet surface on the clean side, wherein at least one area between the inlet surface and the outlet surface is filled with an adsorbent, in particular with particulate or dust-like activated carbon, and arranged in intermediate spaces of the medium that can be flowed through, wherein the area is closed off at a peripheral edge of the inlet surface and/or the outlet surface with a fluid-permeable closing medium, in particular a spunbonded nonwoven.
- the further object is achieved according to a further aspect of the invention by a method for producing a filter element for filtering a fluid, in particular air, with at least one filter medium body with a flowable medium arranged transversely to a flow direction of the fluid, with a raw-side inlet surface and a clean-side outlet surface, at least comprising: filling at least one area of intermediate spaces of the flowable medium between the inlet surface and the outlet surface with an adsorbent, in particular with particulate or dust-like activated carbon; closing off the area at a peripheral edge of the inlet surface and/or the outlet surface with a fluid-permeable closing medium, in particular a spunbonded nonwoven.
- a filter element for filtering a fluid in particular air
- at least one filter medium body with a flowable medium arranged transversely to a flow direction of the fluid with a raw-side inlet surface and a clean-side outlet surface, wherein at least one area between the inlet surface and the outlet surface is filled with an adsorbent, in particular with particulate or dust-like activated carbon, and arranged in spaces between the flowable medium.
- the area is closed off at a peripheral edge of the inlet surface and/or the outlet surface with a fluid-permeable closing medium, in particular a spunbonded nonwoven.
- gaps in a medium through which flow can pass for example a filter medium such as a fleece, paper or the like, are filled with an adsorbent such as activated carbon.
- adsorbent such as activated carbon.
- These gaps can, for example, cover the area between the through which the medium can flow and the inlet surface or the outlet surface.
- the medium itself has intermediate spaces, such as a sponge-like medium, which are filled with the adsorbent.
- the adsorbent is held in the filter medium body because the area is closed off with a fluid-permeable sealing medium, such as a spunbond, which retains the adsorbent.
- the filter medium body can be designed as a filter bellows with a folded filter medium body, in which the spaces between the folds are filled or coated with adsorbent. Both required filtration functions of dust removal and pollutant removal can be advantageously implemented in a compact installation space within a filter element
- the filter medium body can comprise corrugated or corrugated flow-through medium, for example filter paper, combined with a smooth filter medium, for example filter paper.
- a layer of corrugated or corrugated medium can be covered with a layer of smooth medium and wound up, forming channels that can be alternately closed on the inflow side or the outflow side and can accordingly alternately be empty or contain adsorbents.
- all channels can contain adsorbents.
- the filter element produced in this way can be used not only for filtering dust, but also for adsorbing pollutants.
- the filter element can be used as an activated carbon filter element.
- the filter element can be manufactured in any shape. For example, cube-shaped filter elements, but also filter elements with an inclined or trapezoidal design, or other favorable designs can be produced.
- the design with a wound-up flowable medium can have a round or oval design. Designs such as wheel arch filters can also be used.
- the filter medium body of the filter element thus serves advantageously as a carrier structure for the adsorbent.
- the prefabricated filter medium body can advantageously be filled with the adsorbent after production.
- Activated carbon in the form of particles or dust can be used as an adsorbent in the spaces between the medium through which the flow occurs.
- Activated carbon is usually available as splintered carbon or spherical carbon.
- the proposed filter element can be used advantageously in motor vehicles in internal combustion engines for the adsorption of hydrocarbons or as an interior filter. It is also conceivable to use it generally in an air purifier, in an extractor hood, for example in a cooker hood.
- the medium through which the filter element can flow can be folded in a zigzag shape transversely to the flow direction, whereby on an inflow side and/or outflow side of the filter medium body, the area between a fold base of the folds of the filter medium body and a fold tip of the folds is filled with the adsorbent.
- the closing medium can be arranged at the fold tips. In this way, the spaces between the folded medium and the inflow side and/or outflow side can be conveniently filled with the adsorbent.
- the closing medium can be glued to the fold tips and thus prevent the adsorbent from escaping from the filled area to the outside.
- adhesive tracks can be arranged on the inflow side and/or on the outflow side of the folds of the filter medium body along a roll of the folds of the flowable medium.
- the sealing medium can be glued to the fold tips of the folds along the adhesive tracks.
- adhesive tracks which are applied anyway to fix the folds in the filter medium body of the filter element, for example, can be used to connect the sealing medium to the fold tips. The sealing medium can thus be glued to the fold tips along the adhesive tracks in a simple manner and thus permanently connected.
- adhesive sections that extend over the pleat tip can be arranged on the inflow side and/or the outflow side.
- adhesive interruptions that extend over the base of the pleat can be arranged on the outflow side or the inflow side.
- the sealing medium can be glued to the adhesive sections.
- the adhesive traces can thus be interrupted along the unrolling of the pleats. This means that adhesive can be saved by only applying the adhesive sections where they are needed to fix the pleats, namely at the pleat tips.
- the sealing medium can also advantageously be glued to the flow-through medium at the pleat tips, thus safely and permanently sealing off the area in which the adsorbent is filled.
- the filter medium body can have corrugated or corrugated flow-through medium, for example filter paper, combined with a smooth filter medium, for example filter paper.
- a layer of corrugated or corrugated medium can be covered with a layer of smooth medium and wound up, forming channels that can be alternately closed on the inflow side or the outflow side and can accordingly alternately be empty or have adsorbents.
- all channels can have adsorbents.
- the ducts can be filled or coated with adsorbent on one side, preferably on the clean air side, or even on both sides, the clean air side and the unclean air side.
- adsorbent can be held in the channels by means of an applied fleece layer, a grid or the like.
- this can also be achieved by means of adhesive, which forms a closure to close the respective channel.
- the filter medium body can be arranged in a reinforcing frame with at least one seal which is arranged at least partially contiguously around the circumference, at least in sections, on an outer circumferential side of the medium through which flow can take place on the inlet surface or on the outlet surface of the filter medium body.
- the seal can be connected to the reinforcing frame by foaming or injection molding.
- the sealing medium can be connected to the seal.
- the sealing medium can be tightly connected to the seal.
- the sealing medium for example a spunbond, can be connected to the filter element on the inlet surface and/or the outlet surface in a simple and cost-effective manner. This also ensures that the sealing medium tightly seals the area filled with the adsorbent.
- the sealing medium can be connected to the reinforcing frame by foaming or spraying the seal.
- the sealing medium for example a spunbond, can be connected to the filter element on the inlet surface and/or the outlet surface in a simple and cost-effective manner. This also ensures that the sealing medium tightly seals the area filled with the adsorbent.
- the filter medium body can have a grid structure on the inflow side and/or on the outflow side.
- the closing medium can be connected to the grid structure.
- the grid structure for example a perforated sheet, can advantageously support the fold edges of the medium through which flow can take place against the flow pressure and on the other hand protect it from mechanical damage.
- the closing medium can be conveniently attached to this grid structure, for example glued, and thus prevent the adsorbent filled in from escaping.
- a filter system for filtering a fluid in particular air, is proposed, with a filter housing which has at least one inlet for the inflow of the fluid flow and at least one outlet for the outflow of the cleaned fluid flow, and with a filter element arranged in the filter housing between a raw side and a clean side so as to be exchangeable for filtering the fluid, with at least one filter medium body with a medium that can be flowed through arranged transversely to a flow direction of the fluid, with an inlet surface on the raw side and an outlet surface on the clean side.
- At least one area between the inlet surface and the outlet surface is filled with an adsorbent, in particular with particulate or dust-like activated carbon, and arranged in the spaces between the medium that can be flowed through.
- the area is closed off at a peripheral edge of the inlet surface and/or the outlet surface with a fluid-permeable sealing medium, in particular a spunbonded nonwoven.
- gaps in a medium through which flow occurs for example a filter medium, are filled with an adsorbent such as activated carbon. These gaps can, for example, represent the area between the medium through which flow occurs and the inlet surface or the outlet surface.
- the medium itself to have gaps, such as a sponge-like medium, which are filled with the adsorbent.
- the adsorbent is held in the filter medium body because the area is closed off with a fluid-permeable sealing medium, for example a spunbond.
- the filter system can therefore be used not only for filtering dust, but also for adsorbing pollutants.
- the filter element can be used for activated carbon filtration.
- the filter element can be manufactured in any shape. For example, cube-shaped filter elements, but also filter elements with an inclined or trapezoidal shape, or other favorable shapes can be produced. Designs such as wheel arch filters can also be used.
- the filter medium body of the filter element thus serves advantageously as a carrier structure for the adsorbent.
- the prefabricated filter medium body can advantageously be filled with the adsorbent after production.
- Activated carbon in the form of particles or dust can be used as an adsorbent in the spaces between the medium through which the flow occurs.
- Activated carbon is usually available as splintered carbon or spherical carbon.
- the proposed filter system can be used advantageously in motor vehicles in internal combustion engines for the adsorption of hydrocarbons or as an interior filter. It is also conceivable that it could be used in an air purifier or in an extractor hood, for example in a cooker hood.
- a pre-separator stage in particular a cyclone pre-separator, can be arranged in the filter housing upstream of the filter element.
- a safety element can be arranged downstream of the filter element.
- a pre-separator stage can thus be connected upstream of the filter medium body.
- Paper bellows, fleece bellows, bellows made of separator foams, single or multi-layered, or even cyclone pre-separators can be used as pre-separators.
- Conventional secondary filter elements can be used as safety elements. Combinations of pre-separator stages and safety elements can be used favorably with the filter element filled with adsorbent.
- the filter element can be designed as a slide-in filter element that is or can be inserted into the filter housing transversely to the main flow axis of the fluid. Such a design is advantageous for replacing the filter element when loaded.
- a method is proposed for producing a filter element for filtering a fluid, in particular air, with at least one filter medium body with a flowable medium arranged transversely to a flow direction of the fluid, with an inlet surface on the raw side and an outlet surface on the clean side.
- the method comprises at least: filling at least one area of intermediate spaces of the flowable medium between the inlet surface and the outlet surface with an adsorbent, in particular with particulate or dust-like activated carbon; and closing off the area at a peripheral edge of the inlet surface and/or the outlet surface with a fluid-permeable closing medium, in particular a spunbond.
- gaps in a flowable medium of the filter element are filled with an adsorbent such as activated carbon.
- an adsorbent such as activated carbon.
- These gaps can, for example, represent the area between the flowable medium and the inlet surface or the outlet surface.
- the medium itself to have gaps, such as a sponge-like medium, which are filled with the adsorbent.
- the adsorbent is held in the filter medium body because the area is closed off with a fluid-permeable sealing medium, for example a spunbond.
- the filter element produced in this way can be used not only for filtering dust, but also for adsorbing pollutants.
- the filter element can be used for activated carbon filtration.
- the filter element can be manufactured in any shape. For example, cube-shaped filter elements, but also filter elements with an inclined or trapezoidal shape, or other favorable shapes can be produced. Designs such as wheel arch filters can also be used.
- the filter medium body of the filter element thus serves advantageously as a carrier structure for the adsorbent.
- the prefabricated filter medium body can advantageously be filled with the adsorbent after production.
- Activated carbon in the form of particles or dust can be used as an adsorbent in the spaces between the medium through which the flow occurs.
- Activated carbon is usually available as splintered carbon or spherical carbon.
- the proposed filter element can be used advantageously in motor vehicles in internal combustion engines for the adsorption of hydrocarbons or as an interior filter. It is also conceivable to use it generally in an air purifier, in an extractor hood, for example in a cooker hood.
- the method can comprise at least the steps of: inserting the filter medium body with an inlet surface or outlet surface accessible for filling into a taking up and feeding the receptacle into a filling station; filling the area of the filter medium body via the accessible inlet surface or outlet surface with the adsorbent; closing off the area at the inlet surface or outlet surface with the closing medium.
- prefabricated bellows can be placed in a holder and fed to a filling station.
- the adsorbent for example activated carbon
- a vibration plate that is operated at high frequency can advantageously be used to compress the adsorbent.
- the material can then be transported to the next station, where a sealing medium, for example a spunbond, is glued or welded over the filled area of the filter medium body. This can be done, for example, with traces of adhesive on the fold edges of the filter medium body.
- At least the following additional steps can be carried out for filling the filter medium body on both sides: rotating the filter medium body in the holder so that the unfilled area is accessible for filling and feeding the holder into the filling station; filling the area of the filter medium body with the adsorbent; closing off the area at the inlet surface or outlet surface with the closing medium.
- the process described can be repeated with the filter medium body turned over.
- adhesive tracks can be arranged on the inflow side and/or on the outflow side of folds of the filter medium body along a roll of the folds of the flow-through medium, wherein the closing medium is glued to the fold tips of the folds along the adhesive tracks.
- the closing medium can thus be advantageously glued directly to the filter medium body so that the filled area is tightly sealed.
- the filter medium body can be arranged in a reinforcing frame with at least one seal, which is arranged at least partially contiguously around the circumference, at least in sections, on an outer circumferential side of the flowable medium on the inlet surface or on the outlet surface of the filter medium body, in particular by foaming or injection molding connected to the reinforcing frame.
- the sealing medium can be connected to the seal.
- the sealing medium can be foamed or injected into the seal. Further processing of the filter medium body can thus advantageously take place with or without a reinforcing frame, depending on the type of seal.
- the filled area can be sealed by the sealing medium that is tightly connected to the seal, so that the filled adsorbent remains in the gaps between the flowable medium of the filter medium body.
- a grid structure can be arranged on the filter medium body on the inflow side and/or on the outflow side.
- the closing medium to the grid structure can be conveniently applied directly to the grid structure, for example a perforated sheet, and tightly connected to it.
- Fig. 1 shows a longitudinal section through a filter medium body of a filter element according to an embodiment of the invention, in which an area between the inlet surface and the outlet surface is filled with an adsorbent, in particular with particulate or dust-like activated carbon, and is arranged in the gaps between the medium through which flow occurs;
- Fig. 2 shows an enlarged section of the filter medium body according to Fig. 1, in which an area between a flowable medium and the outlet surface is filled with the adsorbent;
- Fig. 3 shows an enlarged section of the filter medium body according to Figure 1, in which the area between the flowable medium and the outlet surface as well as an area between the flowable medium and the inlet surface is filled with the adsorbent;
- Fig. 4 is a longitudinal section through a filter medium body of a filter element with a pre-separator stage arranged upstream of the fluid flow according to a further embodiment of the invention
- Fig. 5 is a longitudinal section through a filter medium body of a filter element with a pre-separator stage arranged upstream of the fluid flow and a safety element arranged downstream of the fluid flow according to a further embodiment of the invention
- Fig. 6 is a longitudinal section through a filter element according to an embodiment of the invention.
- Fig. 7 shows an enlarged section of the filter element according to Figure 6 with focus on the reinforcement frame and seal;
- Fig. 8 is an isometric view of a filter element according to a further embodiment of the invention with a view of the exit surface;
- Fig. 9 is an exploded view of a filter element according to another embodiment of the invention.
- Fig. 10 is a longitudinal section of a filter system with a filter element according to an embodiment of the invention.
- Fig. 1 1 is a schematic representation of the method for producing a filter element according to an embodiment of the invention
- Fig. 12 is a schematic plan view of a front edge of channels of a filter element according to a further embodiment of the invention, in which corrugated or corrugated medium is combined with smooth medium;
- Fig. 13 is a view with channels of a filter element according to Fig. 12 partially filled with adsorbent;
- Fig. 14 is a longitudinal section through a filter element according to a further embodiment of the invention, in which a region between the inlet surface and the outlet surface is filled with an adsorbent and arranged in intermediate spaces of the medium through which the flow can take place;
- Fig. 15 is a longitudinal section through a filter element according to a further embodiment of the invention, in which a region between the inlet surface and the outlet surface is filled with an adsorbent and arranged in intermediate spaces of the medium through which the flow can take place;
- Fig. 16 is an isometric view of a filter element with a wound filter media body according to Figure 12;
- Fig. 17 is a longitudinal section of a filter system with a filter element with wound filter medium body according to Figure 16.
- Figure 1 shows a longitudinal section through a filter medium body 12 of a filter element 10 according to an embodiment of the invention, in which a downstream region 80 between the inlet surface 50 and the outlet surface 52 is filled with an adsorbent 82, in particular with particulate or dust-like activated carbon 84, and is arranged in gaps 21 of the flowable medium 13.
- Figure 2 shows an enlarged section of the filter medium body 12 according to Figure 1.
- the filter medium body 12 is intended to be flowed through by the fluid to be filtered, for example air, from the raw-side inlet surface 50 to the clean-side outlet surface 52.
- the flow direction 134 is indicated by arrows.
- the filter medium body 12 shown in the exemplary embodiment has a zigzag-shaped, flowable medium 13 through which the fluid flows transversely to the flow direction 134.
- At least one area 80 between the inlet surface 50 and the outlet surface 52 is filled with the adsorbent 82, in particular with particulate or dust-like activated carbon 84, and in intermediate spaces
- the region 80 is closed off at a peripheral edge 86 of the outlet surface 52 with a fluid-permeable closing medium 90, in particular a spunbonded fabric.
- the flowable medium 13 is folded in a zigzag shape transverse to the flow direction 134.
- the area 80 between a fold base 25 of folds is folded in a zigzag shape transverse to the flow direction 134.
- the closing medium 90 is arranged at the fold tips 24.
- the fluid flow 134 is shown inside the filter medium body 12. It can be observed that the fluid only flows on the inflow side 70 of the folds 22 of the filter medium body 12 and is filtered before it passes through the flowable medium 13 and flows further in the region 80 which is filled with the adsorbent 82.
- Figure 3 shows an enlarged section of the filter medium body 12 according to Figure 1, in which the region 80 between the flowable medium 13 and the outlet surface 52 as well as an inflow-side region 81 between the flowable medium 13 and the inlet surface 50 are filled with the adsorbent 82.
- gaps 21 of the flowable medium 12 are filled with the adsorbent 82 from both the inflow side 70 and the outflow side 72, so that the filter medium body 12 advantageously has a maximum loading with the adsorbent 82 for the greatest possible adsorption performance.
- adhesive tracks 26, 27 can expediently be arranged along a roll of the folds 22 of the flowable medium 13, so that the closing medium 90 can be glued to the fold tips 24 of the folds 22 along the adhesive tracks 26, 27. Both areas 80, 81 in which the adsorbent 82 is filled are thus sealed against the environment and the adsorbent 82 remains in the filter medium body 12.
- Adhesive sections 28, 29 can be arranged on the inflow side 70 and the outflow side 72, which extend over the fold tip 24.
- adhesive interruptions 30, 31 can be arranged on the outflow side 72 and/or the inflow side 70, which extend over the fold base 25.
- the sealing medium 90 can thus be expediently glued to the adhesive sections 28, 29 at the points where the adhesive sections 28, 29 are applied.
- Figure 4 shows a longitudinal section through a filter medium body 12 of a filter element 10 with a pre-separator stage 15 arranged upstream of the fluid flow according to a further embodiment of the invention.
- a pre-separator stage 15, in particular a cyclone pre-separator 14, can be arranged upstream of the filter element 10.
- a pre-separator stage can thus be connected upstream of the fluid flow to the filter medium body 12.
- paper bellows, fleece bellows, bellows made of separator foams, single or multi-layered, or even cyclone pre-separators can be used as pre-separator stages 15.
- a filter medium body 12 which has a region 80, 81 with adsorbent 82, can advantageously be combined with a pre-separator stage 15 in a filter element 10.
- Figure 5 shows a longitudinal section through a filter medium body 12 of a filter element 10 with a pre-separator stage 15 arranged upstream of the fluid flow and a safety element 16 arranged downstream of the fluid flow according to a further embodiment of the invention.
- a safety element 16 can be arranged downstream of the filter element 10.
- Conventional secondary filter elements can be used as safety elements 16.
- Combinations of pre-separation stages 15 and safety elements 16 can be advantageously combined with the filter element 10 filled with adsorbent 82.
- Figure 6 shows a longitudinal section through a filter element 10 according to an embodiment of the invention.
- the filter medium body 12 is arranged in an element frame 36 and has a circumferential reinforcing frame 18 on the outflow surface 52, with a seal 20 which is arranged at least partially contiguously at least in sections on an outer circumferential side of the medium 13 through which the flow can pass on the outlet surface 52 of the filter medium body 12.
- the seal 20 can be connected to the reinforcing frame 18 by foaming or injection molding.
- the closing medium 90 can expediently be connected to the seal 20, in particular can be tightly connected to the seal 20. The closing medium 90 can thus be connected to the reinforcing frame 18 particularly favorably by foaming or injection molding the seal 20.
- An edge protector 74 is attached to a peripheral edge of the inlet surface 50 in order to protect the filter medium body 12 from damage, for example when it is mounted in a filter housing.
- the edge protector 74 can also be made of molded plastic.
- Figure 7 shows an enlarged section of the filter element 10 according to Figure 6 with a focus on the reinforcement frame 16 and seal 20. It can be seen how the closing medium 90 is integrated into the seal 20 at the peripheral edge 86, for example, in the case of a polyurethane seal 20, it is foamed in or injection-molded on.
- Figure 8 shows an isometric view of a filter element 10 according to a further embodiment of the invention with a view of the exit surface 52.
- the filter element 10 has a filter medium body 12 which is laterally surrounded by an element frame 36 at a peripheral edge 86 and has a peripheral reinforcing frame 16 at the outlet surface 52 which is closed off by a peripheral seal 20.
- the filter medium body 12 has a grid structure 88 in the form of a perforated plate on the outflow side 72 to stabilize the folds 22 against the flow pressure.
- the closing medium 90 which is arranged between the filter medium body 12 and the grid structure 88, can expediently be connected to the grid structure 88.
- the closing medium 90 can be glued to the fold tips 24 by means of adhesive traces 26, which are attached to the invisible fold tips 24, and pressed against the grid structure 88.
- Figure 9 shows an exploded view of a filter element 10 according to a further embodiment of the invention. The individual components of the filter element 10, filter medium body 12, element frame 36, edge protection 74, closing medium 90, grid structure 88, reinforcement frame 18 and seal 20 can be seen.
- the closing medium 90 is arranged between the filter medium body 12, which is at least partially filled with the adsorbent 82, and the grid structure 88.
- Figure 10 shows a longitudinal section of a filter system 100 with a filter element 10 according to an embodiment of the invention.
- the filter system 100 for filtering a fluid comprises a filter housing 110, which has at least one inlet 102 for the inflow of the fluid flow 120 and at least one outlet 104 for the outflow of the cleaned fluid flow 122.
- the raw fluid flow 120 and the clean fluid flow 122 are marked with arrows together with the flow direction 134 in the filter medium body 12.
- the filter housing 110 comprises two housing parts 112 and 114, which are connected to each other.
- a replaceable filter element 10 for filtering the fluid with at least one filter medium body 12 with a flowable medium 13 arranged transversely to a flow direction 134 of the fluid, with a raw-side inlet surface 50 and a clean-side outlet surface 52.
- At least one area 80 between the inlet surface 50 and the outlet surface 52 is filled with an adsorbent 82, in particular with particulate or dust-like activated carbon 84, and is arranged in intermediate spaces 21 of the flowable medium 13.
- the area 80 is closed off at a peripheral edge 86 of the outlet surface 52 with a fluid-permeable closing medium 90, in particular a spunbond.
- a pre-separator stage 15, in particular a cyclone pre-separator 14, is arranged further upstream of the filter element 10.
- a safety element 16 is arranged downstream of the filter element 10.
- the filter housing 110 also has a dirt outlet 106 for discharging dust and dirt separated in the pre-separator stage 15.
- the filter element 10 can expediently be designed as a slide-in filter element that is or can be inserted into the filter housing 110 transversely to the main flow axis 128 of the fluid.
- the installation direction 66 for the slide-in filter element is marked in the illustration.
- the filter element 10 can be replaced via a removable housing cover 116.
- Figure 11 shows a schematic representation of the method for producing a filter element 10 according to an embodiment of the invention.
- at least one region 80, 81 of intermediate spaces 21 of the flowable medium 13 between the inlet surface 50 and the outlet surface 52 is filled with an adsorbent 82, in particular with particulate or dust-like activated carbon 84.
- the region 80, 81 is then closed off at a peripheral edge 86 of the inlet surface 50 and/or the outlet surface 52 with a fluid-permeable sealing medium 90, in particular a spunbonded nonwoven.
- the filling of the adsorbent 82 is shown as an example for the area 80 from the exit surface 52 of the filter medium body 12. After the filling of the adsorbent 82, the area is closed at the edge 86 with the closing medium 90, for example by gluing the closing medium 90 to the filter medium body 12.
- the filter medium body 12 is placed in a holder with an inlet surface 50 or outlet surface 52 accessible for filling and the holder is fed into a filling station.
- the area 80, 81 of the filter medium body 12 is then filled with the adsorbent 82 via the accessible inlet surface 50 or outlet surface 52.
- the area 80, 81 is then closed off at the inlet surface 50 or outlet surface 52 with the closing medium 90.
- the filter medium body 12 is rotated in the holder so that the unfilled area 80, 81 is accessible for filling and the holder can be fed into the filling station.
- the previously unfilled area 80, 81 of the filter medium body 12 is then filled with the adsorbent 82.
- This area 80, 81 is then also closed off at the inlet surface 50 or outlet surface 52 with the closing medium 90.
- adhesive tracks 26, 27 can be arranged on the inflow side 70 and/or on the outflow side 72 of folds 22 of the filter medium body 12 along a roll of the folds 22 of the flowable medium 13.
- the closing medium 90 can expediently be glued to the fold tips 24 of the folds 22 along the adhesive tracks 26, 27.
- the filter medium body 12 can be arranged in a reinforcing frame 18, with at least one seal 20, which is arranged circumferentially at least partially connected at least in sections on an outer circumferential side of the flowable medium 13 on the inlet surface 50 or on the outlet surface 52 of the filter medium body 12.
- the seal 20, which can consist of polyurethane, for example, can be connected to the reinforcing frame 18 by foaming or injection molding.
- the closing medium 90 can advantageously be connected to the seal 20, and in particular foamed or injected into the seal 20.
- a grid structure 88 for supporting the folds 22 of the filter medium body 12 against the flow pressure can be provided on the filter medium body 12 on the inflow side 70 and/or on the outflow side 72.
- the closing medium 90 can advantageously be connected to the grid structure 88.
- Figures 12 to 17 show further embodiments of the invention.
- the filter element 10 comprises a layer 60 of corrugated or corrugated flow-through medium 13 and a layer 62 of smooth flow-through medium 13.
- the medium 13 can be filter paper, for example.
- the layers 60, 62 are placed on top of one another, with the gaps 21 between the media 13 that can flow through forming channels.
- This is shown in Figure 12 in a schematic representation in a top view of a front edge of the channels.
- Figure 13 shows the arrangement according to Figure 12, in which some channels are filled with adsorbent 82 and other channels remain empty.
- all channels can also be filled with adsorbent 82, for example activated carbon or with ion exchangers or the like.
- the openings of the channels can expediently be closed alternately with a closure, for example in the form of pasty adhesive beads, which are applied in the edge area.
- the layers 60, 62 of the medium 13 arranged on top of one another can be wound up ( Figure 16), or several such layers 60, 62 can be stacked on top of one another ( Figures 14 and 15).
- the openings of the channels are alternately closed with a closure 92, for example in the form of pasty adhesive beads, which are applied in the edge region of the channels alternately on the inlet side in one channel and on the outlet side in the adjacent channel.
- a closure 92 for example in the form of pasty adhesive beads, which are applied in the edge region of the channels alternately on the inlet side in one channel and on the outlet side in the adjacent channel.
- the channels with a closure 92 at the inlet surface 50 of the fluid into the filter element 10 contain an adsorbent 82, in particular activated carbon 84, while the channels with a closure 92 at the outlet surface 52 of the fluid are free. From there, the fluid flows from the inlet surface 50 into the areas 80 with the adsorbent 82, in particular activated carbon 84, and exits from the outlet surface 52 at the bottom of the channel filled with adsorbent 82.
- a closure medium 90 for example a spunbond or the like, can be arranged on the outlet surface 52, which retains particles in the channel (area 80) filled with adsorbent 82.
- Figure 14 shows a longitudinal section through a filter element 10, in which an area 80 between the inlet surface 50 and the outlet surface 52 of the fluid to be filtered is filled with an adsorbent 82, in particular with particulate or dust-like activated carbon 84, and arranged in gaps 21 of the flowable medium 13.
- the filter medium body 12 is arranged in an element frame 36 and is provided with a circumferential seal 20 on the downstream side at the outlet surface 52.
- Figure 15 shows a longitudinal section through a filter element 10, in which an area 80 between the inlet surface 50 and the outlet surface 52 is filled with an adsorbent, in particular with particulate or dust-like activated carbon, and is arranged in gaps 21 of the flowable medium 13.
- the filter medium body 12 is arranged in an element frame 36 and on the upstream side is the inlet surface 50 is provided with a circumferential seal 20.
- the element frame 36 overlaps an edge 86 of the filter medium body 12 so that the latter is securely held within the element frame 36.
- Figure 16 shows an isometric view of a filter element 10 with a wound filter medium body according to Figure 12 or 13.
- the filter medium body 12 is arranged within an element frame 36.
- a circumferential seal 20 is arranged on the inlet surface of the fluid.
- An optional emergency seal 19 is arranged near the outlet surface 52.
- Figure 17 shows a longitudinal section of a filter system 100 with the filter element 10 according to Figure 16.
- a raw fluid flow 120 enters the filter housing 110 through an inlet 102.
- the filter element 10 is arranged between the raw side 40 and the clean side 42.
- the circumferential seal 20 seals the clean side 42 against the dirty side 40 and is clamped between the housing cover 116 and the housing pot 118.
- the clean fluid flow 122 exits the housing 110 through the outlet 104.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023103864.8A DE102023103864A1 (de) | 2023-02-16 | 2023-02-16 | Filterelement und Filtersystem |
| PCT/EP2024/051029 WO2024170195A1 (de) | 2023-02-16 | 2024-01-17 | Filterelement und filtersystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4665476A1 true EP4665476A1 (de) | 2025-12-24 |
Family
ID=89715867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24701803.9A Pending EP4665476A1 (de) | 2023-02-16 | 2024-01-17 | Filterelement und filtersystem |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250367585A1 (de) |
| EP (1) | EP4665476A1 (de) |
| DE (1) | DE102023103864A1 (de) |
| WO (1) | WO2024170195A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354365A (en) * | 1993-04-22 | 1994-10-11 | Youn Kun C | Air filter assembly |
| DE102004000050B4 (de) * | 2004-11-17 | 2008-07-31 | Mann + Hummel Gmbh | Filterelement, insbesondere Innenraumfilter, zur stirnseitigen Anströmung |
| DE102009039281A1 (de) * | 2009-08-28 | 2011-03-03 | Mahle International Gmbh | Luftfilter |
| DE102009049156A1 (de) * | 2009-10-12 | 2011-04-21 | Mahle International Gmbh | Luftfilter |
| DE102010019046A1 (de) | 2010-05-03 | 2011-11-03 | Mahle International Gmbh | Filterlage |
-
2023
- 2023-02-16 DE DE102023103864.8A patent/DE102023103864A1/de active Pending
-
2024
- 2024-01-17 WO PCT/EP2024/051029 patent/WO2024170195A1/de not_active Ceased
- 2024-01-17 EP EP24701803.9A patent/EP4665476A1/de active Pending
-
2025
- 2025-08-14 US US19/299,496 patent/US20250367585A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024170195A1 (de) | 2024-08-22 |
| US20250367585A1 (en) | 2025-12-04 |
| DE102023103864A1 (de) | 2024-08-22 |
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