WO2018158387A1 - Élément filtrant, filtre, dispositif de filtration et utilisation du filtre - Google Patents

Élément filtrant, filtre, dispositif de filtration et utilisation du filtre Download PDF

Info

Publication number
WO2018158387A1
WO2018158387A1 PCT/EP2018/055088 EP2018055088W WO2018158387A1 WO 2018158387 A1 WO2018158387 A1 WO 2018158387A1 EP 2018055088 W EP2018055088 W EP 2018055088W WO 2018158387 A1 WO2018158387 A1 WO 2018158387A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
medium
filter medium
air
frame
Prior art date
Application number
PCT/EP2018/055088
Other languages
German (de)
English (en)
Inventor
Jürgen Berrer
Pavel Procházka
Original Assignee
Mann+Hummel Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102017001923.1A external-priority patent/DE102017001923A1/de
Application filed by Mann+Hummel Gmbh filed Critical Mann+Hummel Gmbh
Publication of WO2018158387A1 publication Critical patent/WO2018158387A1/fr

Links

Classifications

    • 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
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B01D46/0008—Two or more filter elements not fluidly connected positioned in the same housing
    • 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
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/188—Multiple filtering elements having filtering areas of different size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
    • B01D2267/40—Different types of filters

Definitions

  • the present application relates to a filter element, a filter with this filter element, a filter system and a use of the filter.
  • filter elements which each serve a functionality, for example as a particle filter or for the removal of hydrocarbons. These are installed as separate elements in different areas of a vehicle.
  • An integration of a plurality of filter media in a flow direction within a housing leads to an increase in the installation space of the filter element and makes its arrangement in the limited space of a vehicle more difficult.
  • DE10 2010 042 424 A1 shows a filter element with a cylindrical frame with several frame segments.
  • each filter media are arranged with similar filter materials.
  • Each frame segment of the filter element thus assumes the same filter function as the adjacent frame segment.
  • EP 3 081 281 A1 discloses a pocket filter with juxtaposed pockets, two pockets each being formed from a different filter medium.
  • US 2012/0079942 A1 discloses a filtration system with a first and a second filter element, wherein the filter elements are arranged parallel to each other, such that a first partial flow of the medium flows through the first filter medium and a second partial flow of the medium through the second filter medium.
  • US 2009/0241490 A1 discloses a filter element having a plurality of filter regions in a rectangular frame, wherein a first filter region removes carbon dioxide, a second filter region removes sulfur dioxide, a third filter region removes nitrogen oxides and a fourth filter region removes mercury.
  • JP 2009203899 A discloses an intake air filter in a vehicle, wherein the filter element has a frame and two filter media arranged side by side in a frame, these filter media sequentially filtering the intake air and thereafter supplied to the engine via an outlet, the sequential structure the two filter media of the resonance reduction and thus the noise reduction of the vehicle is used. Disclosure of the invention
  • the present invention solves this problem by a filter element having the features of claim 1 and by a filter having the features of claim 14 and by a filter ran ran with the features of claim 21.
  • the filter element according to the invention serves for the filtration of intake air in a vehicle.
  • the filtered intake air can be provided, for example, after filtration through the filter element according to the invention, both to the engine as filtered engine intake air and to the interior as filtered interior air.
  • the filter element has a frame.
  • the filter element has at least two filter media, which are arranged side by side in the frame.
  • the frame preferably includes both filter media.
  • the filter material of the first filter medium differs from the filter material of the second filter medium.
  • the filter element can be provided with a plurality of filter media for different filter tasks.
  • the first filter medium is designed, for example, as a particle filter for the filtration of intake air for an internal combustion engine
  • the second filter medium is designed as an interior air filter for reducing the particle and / or noxious gas content in intake air
  • / or the second filter medium is for reducing the humidity in cooling air formed for electrical components, electronic components and / or lamps in a vehicle
  • the second filter medium is formed as a hydrocarbon trap for reducing hydrocarbons in the filter medium, in particular the motor side, flowing gas stream.
  • the first filter medium which is designed as a particle filter for the filtration of intake air for an internal combustion engine, thus provides the engine intake air.
  • the first filter medium is formed as an indoor air filter
  • the second filter medium is designed to reduce the humidity in cooling air for electrical components, electronic components and / or bulbs in a vehicle
  • the second filter medium is as a hydrocarbon trap for reducing hydrocarbons in one formed the filter medium, in particular motor side, inflowing gas stream. If the second filter medium is designed as a hydrocarbon trap for reducing hydrocarbons in a gas, this gas can flow to the filter medium, in particular on the motor side.
  • the second filter medium is designed alternatively or additionally as an interior air filter for reducing the particle and / or noxious gas content in the intake air, the second filter medium provides interior air for the driver's cab of a vehicle.
  • the second filter medium is designed to reduce air humidity in cooling air for electrical components and / or light sources, in particular in a vehicle
  • the second filter medium can in particular reduce the air humidity from intake air, so that it does not adhere moisture to electronic and / or electrical components and / or bulbs comes, which could possibly cause a short circuit.
  • the present invention makes it possible to provide a filter element with two or more different filter media, which are arranged not one behind the other in the flow direction but side by side in a frame.
  • the compact design as a flat filter e.g. both for the provision of engine intake air as well as for engine outgassing hydrocarbons and / or for filtered indoor air and / or for humid teredu intoe intake air possible.
  • the filter element according to the invention thus makes it possible to carry out a plurality of filtration tasks spatially efficient, without requiring further separate filter elements or filters and thus also filter housings for these separate filter elements.
  • the frame may advantageously have a frame plane, wherein the frame is divided into at least a first and a second frame segment, which frame segments are arranged side by side in the frame plane.
  • the first frame segment may surround the first filter medium and the second frame segment the second filter medium.
  • the arrangement in frame segments allows the respective filter medium secure hold in the frame.
  • the filter material of the first filter medium may differ from the filter material of the second filter medium in the chemical composition of the filter material and / or the mean pore size of the filter material and / or the average basis weight of the filter material. This variation allows for easy delivery of a desired filter performance, in particular with regard to the desired separation efficiency of the air to be filtered for the respective filter medium depending on the application.
  • the first filter medium may be formed as a first filter body in the form of a bellows and the second filter medium may be formed as a second filter body in the form of a bellows or a flat filter, wherein the two filter bodies are arranged side by side in the frame plane.
  • the two filter bodies are arranged side by side in the frame plane.
  • each of the filter media in particular in its configuration as a bellows, have an inflow side and an outflow side. These two sides are arranged parallel to each other in the preferred embodiment.
  • the pleat height of the pleats of the respective bellows is preferably the majority, preferably the same size for at least more than 90% of all pleats.
  • the filter element is advantageously a filter element with two flow areas, each with a different filter characteristic, wherein more flow areas are possible.
  • the frame preferably serves as the sole element which seals the two flow-through areas when the filter element is arranged in the housing of a filter.
  • the frame may have a circumferential seal of elastic material which seals the two flow areas.
  • the seal can hereby take place radially or axially.
  • the first filter medium which is preferably designed in particular as a particle filter for the filtration of intake air for an internal combustion engine, may have an activated carbon concentration of less than 20 g / m 2 , and the second filter medium may advantageously have an active carbon concentration of more than 50 g / m 2 exhibit.
  • the second filter medium allows attaching and reducing of hydrocarbons contained in the gas stream to the activated carbon, while the first filter medium is still available for a high dust or particle uptake capacity due to its small amount of activated carbon.
  • the filter element is preferably designed as a flat filter. Such a flat filter is characterized by a low overall height, in particular less than or equal to 70 mm, preferably less than or equal to 20 to 60 mm, particularly preferably less than or equal to 55 mm.
  • At least one of the filter media may be formed from a cellulosic material, in particular a cellulose-based paper, or a nonwoven material.
  • the frame has an elastic material.
  • the frame may be formed entirely of said material; Alternatively, it is also possible that the elastic material is arranged only as a sealing element on or on a plastic framework.
  • the first and the second frame segment can advantageously be separated from each other by a central web.
  • This central web allows a spatial separation of the filter media and a better guidance of a gas flow optionally to the first and / or second filter medium.
  • At least the central web can have the aforementioned sealing element.
  • the sealing element can limit one of the filter media on the edge and peripherally. It is preferably also possible that each of the two filter media is limited by the circumferential sealing element.
  • a filter for the filtration of gaseous media which comprises a housing and a filter element according to the invention.
  • the housing may advantageously have at least one housing pot for receiving the filter element in the housing with a receiving opening for introducing the filter element and with at least one opening for introducing intake air and / or for discharging filtered air. Furthermore, the housing may have a housing cover for closing the receiving opening of the housing pot, wherein the housing cover is detachably connected to the housing pot. This makes it possible to remove and replace the filter element according to the invention.
  • the housing cover in interaction with the housing pot and the filter element arranged therein form at least one housing space, wherein a medium supply in the housing space by the first filter medium takes place, and a medium drainage from the housing space by the second filter medium.
  • the medium supplied in the flow direction may preferably be intake air, in particular from the environment.
  • the housing cover may have one or preferably two or more discharge openings for a filtered medium. By arranged in the housing cover discharge openings, it is possible that a parallel filtration of one or more of the filter supplied gas flows through the filter element.
  • the filter element is characterized by its compact design.
  • the housing cover in cooperation with the filter element, may define a first discharge region for a medium which has passed through the first filter medium and a second discharge region for a medium which has been passed through the second filter medium, the two discharge regions being separated from one another within the housing , This results in no mixing of the two filtered according to different criteria gases in the first and second discharge area.
  • the filter according to the invention is particularly advantageous for providing and / or for filtration of two medium streams of different composition or for two different Filtra- tion tasks, especially as a particulate filter for intake air of an internal combustion engine and either as cabin air filters or to reduce the humidity in cooling air for electrical components, electronic components and / or bulbs in a vehicle or as a hydrocarbon trap or as a cabin filter and either for reducing the humidity in cooling air for electrical components, electronic components and / or bulbs in a vehicle or used as hydrocarbon traps, whereby more than two media streams of different composition can be filtered or more than two of the filtration tasks can be performed by the filter according to the invention.
  • a particularly preferred use of the filter according to the invention is the use as a particle filter for providing engine intake air and the use as hydrocarbon traps for reducing the hydrocarbon content from gases, in particular from fuel outgassing.
  • preferred uses of the inventive filter are, for example, the use of the filter according to the invention as a particulate filter to provide engine intake air and as hydrocarbon traps to reduce hydrocarbon content from hydrocarbon-containing gases, particularly fuel gassings, or as a particulate filter to provide engine intake air.
  • a further additional or alternative embodiment is the use of the filter according to the invention as a particle filter for providing engine intake air and as a filter for reducing the humidity in cooling air for electrical components, electronic components and / or lighting in a vehicle or as a particle filter for providing engine intake air.
  • a further alternative or additional embodiment is the use of the filter according to the invention as a particle filter and as an interior air filter.
  • the filter according to the invention can also be used as a cabin filter and as a hydrocarbon trap for reducing the hydrocarbon content of hydrocarbon-containing gases, in particular fuel outgassing and / or as a cabin filter and as a filter for reducing the humidity in cooling air for electrical components, electronic components and / or lighting in a vehicle.
  • a filtration system according to the invention of a vehicle comprises a supply line which serves to supply ambient air drawn in outside the vehicle to the filter according to the invention.
  • a filtration system according to the invention also comprises the filter according to the invention and a derivative which directs filtered ambient air to a motor.
  • the filter according to the invention has the first filter medium for the filtration of intake air supplied through the feed line, and the second filter medium for the filtration of hydrocarbon-containing gas flowing in through the discharge line.
  • the filtration system of the vehicle comprises
  • a supply line to a cooling device, in particular an air cooling device, for electrical components, electronic components and / or light sources in a vehicle,
  • the filter according to the invention the first filter medium for the filtration of intake air supplied through the supply line and
  • the filter according to the invention comprises the second filter medium for the filtration of hydrocarbon-containing gas flowing through the discharge or
  • the filter according to the invention comprises the first filter medium for the filtration of intake air supplied through the supply line and
  • the filter according to the invention comprises the second filter medium for the filtration of interior air of the air conditioner or
  • the filter according to the invention comprises the first filter medium for the filtration of intake air supplied through the supply line and
  • the second filter medium of the filter according to the invention is designed to reduce the humidity in cooling air for electrical components, electronic components and / or lamps in a vehicle or
  • the filter according to the invention comprises the first filter medium for the filtration of indoor air of the air conditioner and
  • the second filter medium of the filter according to the invention is designed to reduce the humidity in cooling air for electrical components, electronic components and / or lamps in the vehicle or
  • the filter according to the invention comprises the first filter medium for the filtration of indoor air of the air conditioner and wherein the second filter medium of the filter according to the invention is designed for the filtration of hydrocarbon-containing gas flowing through the discharge.
  • FIG. 1 shows a schematic perspective view of a filter element according to the invention, comprising two different filter media for the filtration of a first and a second media stream;
  • FIG 2 is a schematic perspective view of the filter element of the invention of Figure 1 with the filter media shown as bellows.
  • Fig. 3 is a schematic sectional view through a first filter according to the invention, comprising the filter element of Fig. 1;
  • Fig. 4 is a schematic sectional view through a second filter according to the invention, comprising the filter element of Fig. 1;
  • FIG. 5 shows a schematic sectional view through a third filter according to the invention, comprising the filter element of FIG. 1.
  • FIG. 1 shows a filter element 1 according to the invention, comprising two filter media 3 and 4 and a frame 2 which encloses the two filter media 3, 4.
  • the first and the second of the two filter media 3, 4 differ with regard to their material composition.
  • the frame 2 limits the edges of the first and the second filter medium 3, 4 and divides these two filter media by a central web 5 from each other. At the same time, the central web 5 divides the frame into two frame segments 41, 42.
  • the first filter medium 3 may be formed as a flat filter body or particularly preferably as a folded filter body, preferably as a zigzag folded filter bellows. The latter variant is particularly advantageous since the air resistance through the folded filter medium thus advantageously decreases.
  • the filter medium 3 can be formed from a first nonwoven and / or cellulose material, in particular as a cellulose-based paper.
  • the first filter medium 3 may preferably be constructed in one layer; However, it is also a multilayer structure possible. Preferably, the number and thickness of the material layers of the filter medium are to be selected so that the first filter medium is foldable.
  • the second filter medium 4 can preferably also be designed as a folded filter body, preferably as a zigzag-folded filter bellows. However, it is also possible in that the filter medium 4 is designed as a flat unfolded filter body, which is arranged flat within the frame.
  • the second filter medium 4 may be formed from a second nonwoven and / or cellulosic material, in particular a cellulose-based paper.
  • the second filter medium 4 may preferably be constructed in one layer, but it is also a multi-layer structure possible. Preferably, the number and thickness of the material layers of the second filter medium are to be selected such that the second filter medium is likewise foldable.
  • the first filter medium 3 is used in a first embodiment of the invention, the filtration of particles from the intake air of a fuel system for an internal combustion engine, so to provide engine intake air.
  • the second filter medium 4 can serve to reduce hydrocarbons.
  • the filter medium is often called hydrocarbon traps (HC trap). It is used to check and / or storage of volatile organic compounds (engl. VOC's) residues from fuel. These fuel residues can accumulate in the supply paths of the internal combustion engine and secrete the abovementioned volatile organic compounds at a standstill of the internal combustion engine.
  • the second filter medium contains activated carbon.
  • the second filter medium has a carrier layer on which the activated carbon particles of the activated carbon are arranged.
  • the arrangement of the activated carbon particles can be effected by immobilization of the activated carbon particles on the support layer. This can be achieved by adhering the activated carbon particles with a binder, e.g. by an adhesive or by melt adhesive fibers.
  • the binder for immobilizing the activated carbon particles may preferably be a reactive adhesive, for example based on polyurethane or silane, and / or a thermoplastic adhesive, for example based on polyolefins.
  • the carrier medium may be formed as a first carrier layer, preferably as a particle filter, and the activated carbon may be formed as an activated carbon layer immediately adjacent to the first carrier layer.
  • a second carrier layer can likewise be arranged directly on the activated carbon layer, so that a sandwich structure results, with the activated carbon layer as middle layer.
  • a two-layer arrangement of the first carrier layer and the activated carbon layer can also be realized.
  • the Support layers of the second filter medium 4 bordered at least peripherally with each other, for example, welded together, be.
  • the activated carbon may also be arranged pourable or free-flowing on the carrier medium. This is particularly preferred in the above-mentioned variant, in which at least one activated carbon layer is enclosed between at least two support layers connected on the edge side and optionally additionally arranged in the pockets.
  • the carrier medium can be used as a foldable textile carrier medium, e.g. as fleece and / or cellulosic material, be formed.
  • the frame encompasses two filter media, wherein the first filter medium is designed to filter particles from the intake air for delivery to an internal combustion engine and wherein the second filter medium is configured to filter hydrocarbons.
  • the first filter medium 3 may, for example, also be embodied as a particle filter for the filtration of intake air for an internal combustion engine and the second filter medium 4 may be designed as an interior air filter for reducing the particle and / or noxious gas content in intake air 201 and / or the second filter medium 4 may additionally or alternatively be used for Reduction of air moisture in cooling air for electrical components, electronic components and / or lighting means may be formed in a vehicle.
  • the first filter medium 3 may be formed as an interior air filter and the second filter medium 4 for reducing the humidity in cooling air for electrical components, electronic components and / or bulbs may be formed in the vehicle and / or the second filter medium 4 may additionally or alternatively as hydrocarbon traps Reduction of hydrocarbons in a filter medium 4, in particular the motor side, inflowing gas flow may be formed.
  • the frame segments 41, 42 are sized equal. However, it is also possible that the frame segments are dimensioned differently large. Thus, it is particularly advantageous if a first frame segment 41 of the two frame segments, which encloses the first filter medium for cleaning the intake air for the engine, is sized equal to or larger than the second frame segment 42 of the two frame segments.
  • a first frame segment 41 of the two frame segments which encloses the first filter medium for cleaning the intake air for the engine, is sized equal to or larger than the second frame segment 42 of the two frame segments.
  • the entire intake air for the engine is to be passed through the filter element 1.
  • the second filter medium 4 has as a hydrocarbon separator only a very low retention function for particles.
  • the P are much lower than in the first filter medium. Accordingly, it is advantageous to dimension the first frame segment 41 equal to or larger than the second frame segment 42.
  • the first filter medium 3 is preferably folded into a bellows.
  • the filter medium may preferably be formed from a synthetic fleece or from cellulose.
  • the volume flow which is filtered by the first filter medium 3 is preferably 2-10 m 3 / min.
  • the first filter medium is designed to remove more than 97% by weight, preferably more than 98% by weight, of all particles from the ambient air at the aforementioned volume flow.
  • the second filter medium 4 can be used both as a flat filter or as a bellows.
  • the medium comprises activated carbon. This can preferably be arranged in layers on one, particularly preferably between two nonwoven layers.
  • the filter medium 4 comprises at least two layers of activated carbon, which are preferably separated from each other by a nonwoven layer.
  • the content of activated carbon in the filter medium preferably corresponds to more than 200 g / m 2 , preferably 250-700 g / m 2 .
  • charcoal may preferably be used in the first embodiment.
  • the second filter medium in its function as a hydrocarbon trap, enables a reduction of the hydrocarbon content in the gas discharged from the engine by at least 50% by weight, preferably by more than 80% by weight, more preferably by more than 95% by weight.
  • the filter element 1 according to the invention is also suitable as an alternative or in addition to installation in a so-called. Double-flow system, ie in two gaseous media streams fed in parallel, wherein it is necessary to reduce contents of different amounts from each of the two media streams.
  • Double-flow system ie in two gaseous media streams fed in parallel, wherein it is necessary to reduce contents of different amounts from each of the two media streams.
  • a second embodiment of the invention primarily the content of solid particles can be reduced from the intake air for the engine.
  • the effects of the abrasive particles are abrasive for the engine and downstream components.
  • This cleaning of the intake air can, as in the first embodiment, by the filter body formed by the first filter medium 3, preferably as a bellows, take place.
  • the filter medium may likewise preferably be formed from a synthetic fleece or from cellulose.
  • the volume flow which is filtered by the first filter medium 3 is preferably 2-10 m 3 / min.
  • the first filter medium is designed to remove more than 97% by weight, preferably more than 98% by weight, of all particles from the ambient air at the aforementioned volume flow.
  • the air in the interior of the vehicle can advantageously be cleaned by the second filter element 4.
  • the filter body formed by the second filter medium 4 may thus be formed as an interior air filter.
  • the cabin air filter is used to clean the air supplied to a driver's cab in vehicles, agricultural machinery, construction machinery and work machines. Both pure particle filters and combined filters in the form of an activated carbon-containing particle filter are known in this field of application.
  • the combined filter additionally allows accumulation and / or deposition of organic constituents or even ozone in the filter element 1.
  • the second filter medium preferably comprises a first filter layer of electrostatically charged fibers in order to filter even the smallest dust particles and pollen from the air.
  • the second filter medium 4 may have less than 250 g / m 2 , but preferably less than 120-200 g / m 2 of activated carbon.
  • the preferred activated carbon used for use in the cabin air filter coconut charcoal is 1 -5 m 3 / min.
  • the second filter medium 4 is at the same time designed as a particle filter for removing more than 97% by weight. preferably more than 98% by weight, of all particles from the ambient air at the aforementioned volume flow.
  • the mean pore size of the cabin air filter may preferably be greater than the mean pore size of the engine intake air filter, that is to say of the first filter medium 3.
  • a hydrophobic activated carbon can be used as the activated carbon.
  • Hydrophobic activated carbons are understood in particular to be those which have a comparatively low water absorption capacity.
  • an activated carbon is used, which at a relative humidity of 50% has a water absorption of ⁇ 10 mass percent, in particular based on the adsorption of the isotherm. This water absorption is particularly preferably ⁇ 5% by mass.
  • the activated carbon used in the cabin air filter may preferably have a BET surface area greater than 400 m 2 / g, advantageously greater than 600 m 2 / g, preferably greater than 800 m 2 / g, particularly preferably greater than 1000 m 2 / g (preferably measured according to DIN ISO 9277: 2003-05).
  • the activated carbon particles When used as cabin air filters, the activated carbon particles preferably have activated carbon particle sizes (average diameter) of between 0.1 and 1 mm, preferably 0.2 to 0.7 mm, and may be in the form of granulated activated carbon or activated carbon ball, for example.
  • the second filter medium 4 may have a fine filter layer for the separation of aerosols.
  • the second filter medium 4 may have a prefilter layer for the separation of particulate dusts.
  • the prefilter layer By using the prefilter layer it can be achieved that further filter layers of the second filter medium, e.g. an adsorption layer with the activated carbon or the fine filter layer are protected against excessive dust loading. As a result, their function (hydrocarbon removal of the adsorption layer and aerosol separation of the fine filter layer) is impaired to the least extent possible even with very dust-laden intake air.
  • a layer of a fixed bed of activated carbon can be used as the first filter layer with activated carbon.
  • This can be realized in a single-layer or multi-layer structure.
  • a carrier layer for example, a plastic expanded mesh or a layer of a sheet material, such as a particulate filter medium can be used.
  • a nonwoven fabric made from spunbonded or meltblown polyester fibers for example PET fibers (polyethylene terephthalate) or PBT fibers (polybutylene terephthalate) is used as the carrier layer.
  • This may be a basis weight of 25-120 g / m 2 , preferably 50-100 g / m 2 , more preferably 65-85 g / m 2 , and an air permeability> 3000 l / m 2 s, preferably> 5000 l / m 2 s at a pressure difference of 200 Pa have.
  • the air permeability is measured in particular according to ISO 9347.
  • the fill layer of activated carbon particles is applied to the carrier layer and preferably fixed on the carrier layer by means of a fine adhesive application.
  • the pour layer preferably comprises a coating of 100-1200 g / m 2 of activated carbon particles on the carrier layer. Preferably, between 800 and 1000 g / m 2 are used.
  • the position of a fixed bed with carrier layer and pour layer preferably has an air permeability in the range from 800 to 1200 l / m 2 s, in particular between 900 and 1 100 l / m 2 s and a basis weight in the range from 850 to 1250 g / m 2 , in particular between 950 and 1 150 g / m 2 , with a layer thickness, in particular in the range of 2 to 6 mm.
  • the first filter layer may have two regions of different activated carbon density.
  • an area with a higher active carbon density on the outflow side and an area with a lower active carbon density on the upstream side are preferably arranged.
  • This can be achieved, for example, by placing two layers of different foams filled with activated carbon particles on top of one another, wherein the downstream side has a higher degree of filling of activated carbon than the upstream side.
  • a layer structure of layers with fixed beds of activated carbon particles can be used, in which one or more downstream layers or layers, which in particular close the layer structure to the downstream side, have a higher activated carbon density.
  • the outflow layers can be achieved, for example, by calendering the outflow layers, in particular before, during or after the hardening of the adhesive, with the same materials for support layers, fill layers and cover layers so that the layer thickness is reduced and thus the activated carbon density is increased.
  • the higher carbon density layer an activated carbon granulate having a higher bulk density than that used for the lower density layers. This can be realized either by activated carbons with different specific gravity or by different geometries of the particles. As a result, in particular a blocking position is shown, which can reliably enable the deposition of residual concentrations of harmful gases. This can provide additional security for the user.
  • the first active carbon-containing filter layer of the second filter medium can be found in the description of the adsorption filter layer of DE10201301 1457A1. Additionally or alternatively, the second filter medium 4 in the aforementioned second embodiment may comprise an anti-allergenic substance.
  • This anti-allergenic substance can be selected from a group consisting of polyphenols, anti-allergenic enzymes, antimicrobial metals and metal compounds, in particular silver, copper and aluminum compounds, nanosilver, zinc pyrithione, octa-isothiazolone, 2-bromo-2-nitropropane-1,3-diol, Isothiazolinone compounds, benzoic acid and its derivatives, benzalkonium halides, water-soluble coenzymes, oil-soluble coenzymes, plant extracts, antibiotics, biocidal metals, aliphatic and aromatic fatty acids and / or quaternary surfactants.
  • the filter element 1 according to the invention is in a third embodiment alternative or in addition to the simultaneous filtration of intake air both for the engine and for operating an air cooling for electronic components, batteries and / or headlights.
  • the cleaning of the intake air to provide engine intake air can, as in the previous embodiment, be carried out by the filter body formed by the first filter medium 3, analogous to the first and / or second embodiment.
  • the air for operating the air cooling of the aforementioned components can advantageously be cleaned by the second filter medium 4.
  • the supplied air should be freed of particles and the humidity should be reduced.
  • the second filter medium 4 may be formed as a flat filter or bellows.
  • the second filter medium has a diffusion membrane, in particular a hydrophobic diffusion membrane, or the second filter medium is designed as such a diffusion membrane.
  • the material of the diffusion membrane may preferably be more than 50% by weight, more preferably completely, of polypropylene, polyethylene or PTFE.
  • the diffusion membrane serves for passing a volume flow of less than 1 m 3 / h.
  • the diffusion membrane can exclusively have pores with an average pore size of less than 50 nm, preferably less than 10 nm.
  • frame 2 will be described in more detail.
  • the filter media 3 and 4 can be enclosed in accordance with all the aforementioned exemplary embodiments for the different filter elements according to the invention.
  • the frame 2 defines a frame plane 101 parallel to the xy plane in FIG. 1. In this frame plane 101 or parallel to this frame plane 101, the first and the second filter medium 3 and 4 are arranged side by side.
  • the filter element can advantageously be realized as a flat filter element.
  • the filter element thus combines filter elements with different functions in a single filter element, which is designed as a flat filter element with a small space height 21.
  • the installation space height 21 of the filter element 1 is preferably less than or equal to 70 mm, preferably less than or equal to 20 to 60 mm, particularly preferably less than or equal to 55 mm.
  • the frame 2 is provided circumferentially around the adjacently arranged filter media 3, 4.
  • the frame 2 comprises the Faltenprofii of the respective filter body in a peripheral region by side segments 51, 52 of the frame 2.
  • Fig. 1 are on one longitudinal side of the filter medium 3 or 4 on the front side, the first of the two side segments 51 and the rear side, the second of the two side segments 7 attached.
  • the frame 2 has head segments 53, 54.
  • a head segment 53, 54 is attached to a respective first end fold of the first or the second filter medium 3, 4.
  • the central web 5 is the second end folds of the first and second filter media 3, 4 arranged.
  • the side segments 51, 52, the central web 5 and the head segments 53, 54 are formed like a strip.
  • the frame 2 is shown in the sectional view.
  • a plastic framework 20 and a sealing element 23, which surrounds the core material in an unfastened manner The plastic framework may for example be a thermoplastic, preferably a polyamide. Also a reinforcement, e.g. a fiber reinforcement of the plastic framework is conceivable.
  • the plastic framework 20 is circumferential both around the first and around the second filter medium 3, 4 and limits the respective filter media edge. The plastic framework 20 gives the frame 2 improved mechanical stability.
  • the plastic framework 20 may extend flat in the frame plane 101.
  • the plastic framework 20, as shown in FIGS. 3 to 5 may be L-shaped at least along the side regions 51, 52 and / or along the head regions 53, 54, wherein one leg of the L-shape preferably extends perpendicular to the frame plane 101 and preferably limits the first and / or second filter media.
  • the plastic framework 20 is designed such that it extends on the edge side, in regions or completely, over the V-shape of the folds of the first and / or second filter medium.
  • the plastic frame 20 has a U-shaped strip shape, with two legs, which preferably extend perpendicular to the frame plane 101 and extend analogously to the legs of the side and head areas 51-54.
  • two plastic frameworks may be provided, with two side regions of the plastic frameworks being connected to one another in the region of the central web by the sealing element 23.
  • the sealing element 23 may be made of an elastomer and / or a polyurethane material.
  • the sealing element 23 can, as shown in FIGS. 3 to 5, be materially connected to the plastic framework 20. In this case, the sealing element 23 may only partially cover the surface of the plastic frame 20 or envelop this fully.
  • the central web 5 of the frame 2 has a U-shaped recess for receiving a housing projection 39, 439, 539.
  • the frame 2 in particular the sealing element 23 of the frame 2, has a projection 24 with a bearing surface 25, which preferably runs parallel to or on the frame plane 101.
  • the projection 24 is formed as a sealing strip, which protrudes obliquely, in particular perpendicularly from the frame plane.
  • This sealing strip also extends over the region of the central web 5.
  • the height 220 of the sealing strip may preferably be at least 10% of the frame height 221, preferably at least 15% of the frame height 221, ie the extent of the frame perpendicular to the frame plane 101 ,
  • the sealing element 23 and in particular the sealing strip of the sealing element 23 is formed from an elastic material and can be compressed, so that lateral sealing can take place when the filter element 1 is mounted on the edge.
  • connection between the plastic framework 20, the sealing element 23 and the filter media 3, 4 can be done for example in a casting process.
  • a connection between the plastic framework 20 and the filter media 3, 4 can be produced by casting, gluing or the like and only after the sealing element, for example by the casting method described above, be supplemented.
  • a similar process of manufacture can also be accomplished by casting an elastomeric material after previously providing the mold and the two filter media 3 and 4.
  • the filter body of the first and second filter medium 2, 3 is shown in Fig. 1 as a bellows. A corresponding fold profile was schematically indicated in FIG.
  • the plastic framework 20 serves to stabilize the frame 2, but it can also be omitted in favor of a higher flexibility of the filter element 1.
  • the two filter media 3, 4 can be arranged in their configuration as a bellows in a further variant of the invention also rotated by 90 ° in the frame plane.
  • a filter 10 with a filter housing 1 1 and the filter element 1 is also shown.
  • the filter housing 1 1 has at least one housing pot 12 and a housing cover 13.
  • Housing cover 13 has in Fig. 3, a single lid opening 14 for connection to the housing pot 12.
  • the housing cover 13 also has a hold-down element 15, with which the housing pot 12 presses on the sealing element 23 of the filter element 1 in the region of the central web 5.
  • the hold-down element 15 may be strip-shaped, preferably with a U-shaped cross section. Between the hold-down element 15 and a housing cover top plate 16, a transfer opening 17 is arranged.
  • the first and the second gas chamber 18, 19 are connected to each other through the transfer opening 17, so that a gas exchange between the first and the second gas chamber 18, 19 can take place.
  • the housing pot has an edge area 26 which is graduated relative to the housing top surface 16. This edge region 26 presses in the assembled state of the filter 10 on the edge side of the frame 2 arranged sealing strip of the sealing element 23, and seals the gas chambers 18, 19 against gas and dirt leakage at the junction between the housing cover 13 and housing pot 12 from.
  • the housing pot 12 has a receiving opening 30, via which the filter element 1 in the housing pot 12 can be inserted and arranged.
  • the housing pot 12 has a stop surface 31 for arranging the bearing surface of the projection of the frame 2. against this bearing surface, the sealing strip is pressed at closure of the housing pot 12 with the housing cover 1 1.
  • the housing pot 12 also has an intake air opening 32 and an engine side opening 33 for discharging filtered clean air 203 to an engine of a vehicle.
  • the motor-side opening 33 also serves to supply motor-side hydrocarbon-containing gases 202 into the filter 10.
  • the housing pot 12 has a first housing region 34 in the region of the intake air opening 32, and the motor-side opening 33 has a second housing region 35.
  • the two housing portions 34, 35 are spatially separated from each other, so that an air supplied through the intake air opening 32 can be passed only through the first filter medium 3 and through the second filter medium 4 to the motor-side opening 33.
  • the first filter medium 3 is designed as a particle filter for filtering engine intake air and the second filter medium 4 is designed as a hydrocarbon trap, which hydrocarbons ausgasende from fuel, oil and combustion product residues removed from the motor and motor supply area.
  • FIG. 4 shows a second embodiment of a filter 410 a housing 41 1, in which the filter element 1 of FIG. 1 is arranged.
  • a housing pot 412 of the housing 41 1 is formed analogous to the housing pot 12 of FIG. 3, e.g. is formed with a receiving opening 420 for receiving the filter element 1, in particular with a receiving opening 430 for receiving the filter element 1 and with an opening 432 for introducing intake air 201.
  • a housing cover 413 has two housing openings 451, 452 instead of a closed housing cover top plate 16.
  • a first of the two housing openings 451 serves for discharging a first medium flow conducted through the first filter medium 3.
  • This may be engine intake air 203.
  • a second of the two housing openings 452 serves for the discharge of a second medium flow which is conducted through the second filter medium 4 and which differs in composition from the first medium flow.
  • This may be a gas 204 which is introduced as hydrocarbon-containing gas 202 and, after passing through the filter element 1, is largely free of hydrocarbons, which, however, unlike in FIG. 3, is not in the same flow path as the first one Media stream 41 1, is passed through the filter 410, but on a parallel second flow path.
  • the filter 410 has a first housing region 453 in the region of the first housing opening 451 and a second housing region 454 in the region of the second housing opening. These two housing regions 453, 454 are spatially separated from one another in the filter 410, in particular by the central web 5 and at least one central housing wall 455 of the housing cover 413 resting on the central web 5.
  • the second medium flow discharged through the second housing opening 452 may also be designed as interior air for a driver's cab.
  • the air supplied to the second filter medium 4 of the filter element 1 is preferably intake air.
  • FIG. 5 shows a third embodiment variant of a filter 510 with a housing 51 1, in which the filter element 1 of FIG. 1 is arranged.
  • a housing cover 513 of the housing 51 1 is analogous to the housing cover 413 of FIG. 4 is formed.
  • a housing pot 512 of the housing 51 1 has only a single further opening 570 in the form of an intake air opening.
  • a flow divider 560 is arranged centrally or decentrally. This subdivides the housing pot 512 into a first and a second inflow region 561 and 562.
  • the first inflow region 561 enables the supply of sucked ambient air to the first filter medium 3, and the second inflow region 562 allows the supply of sucked ambient air to the second filter medium 4.
  • the first filter medium 3 may be formed in this third embodiment variant for the filtration of engine intake air.
  • the second filter medium 4 may be designed for the filtration of intake air for feeding into the driver's cab or alternatively for cooling electrical and / or electronic components
  • a first of the two housing openings 551 serves to discharge a first medium flow conducted through the first filter medium 3. This may be engine intake air 203.
  • a second of the two housing openings 552 serves for the discharge of a second medium flow which is conducted through the second filter medium 4 and which differs in its composition from the first medium flow. This may be indoor air 205.
  • the filter 510 has a first housing region 553 in the region of the first housing opening 551 and a second housing region 554 in the region of the second housing opening. These two housing regions 553, 554 are spatially separated from one another in the filter 510, in particular by means of the central web 5 and at least one central housing wall 555 of the housing cover 513 resting on the central web 5.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un élément filtrant conçu pour filtrer l'air d'admission dans un véhicule, cet élément filtrant comprenant un cadre et cet élément filtrant comportant au moins deux moyens de filtration disposés de manière juxtaposée dans le cadre, la matière de filtration du premier moyen de filtration étant différente de la matière de filtration du deuxième moyen de filtration, le premier moyen de filtration se présentant sous la forme d'un filtre à particules destiné à filtrer l'air d'admission pour un moteur à combustion interne et le deuxième moyen de filtration se présentant sous la forme d'un filtre à air d'habitacle pour réduire la teneur en particules et/ou en gaz polluants dans l'air d'admission et/ou le deuxième moyen de filtration étant conçu pour réduire l'humidité de l'air de refroidissement pour des composants électriques, composants électroniques et/ou moyens d'éclairage dans un véhicule et/ou le deuxième moyen de filtration se présentant sous la forme d'un piège à hydrocarbures pour réduire les hydrocarbures dans un flux gazeux circulant dans le moyen de filtration, en particulier côté moteur, ou le premier moyen de filtration se présentant sous la forme d'un filtre à air d'habitacle et le deuxième moyen de filtration étant conçu pour réduire l'humidité de l'air de refroidissement pour des composants électriques, composants électroniques et/ou moyens d'éclairage dans un véhicule et/ou le deuxième moyen de filtration se présentant sous la forme d'un piège à hydrocarbures pour réduire les hydrocarbures dans un flux gazeux circulant dans le moyen de filtration, en particulier côté moteur. Cette invention concerne en outre un filtre, une utilisation du filtre et un dispositif de filtration.
PCT/EP2018/055088 2017-03-02 2018-03-01 Élément filtrant, filtre, dispositif de filtration et utilisation du filtre WO2018158387A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102017001923.1A DE102017001923A1 (de) 2017-03-02 2017-03-02 Filterelement, Filter, Filteranlage und Verwendung des Filters
DE102017001923.1 2017-03-02
DE102017002173 2017-03-09
DE102017002173.2 2017-03-09

Publications (1)

Publication Number Publication Date
WO2018158387A1 true WO2018158387A1 (fr) 2018-09-07

Family

ID=61837723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/055088 WO2018158387A1 (fr) 2017-03-02 2018-03-01 Élément filtrant, filtre, dispositif de filtration et utilisation du filtre

Country Status (1)

Country Link
WO (1) WO2018158387A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3421112A1 (fr) * 2017-06-28 2019-01-02 Mann+Hummel GmbH Élément filtrant plat, en particulier destiné à la filtration de gaz
EP3881884A1 (fr) * 2020-03-18 2021-09-22 Air Liquide Medical Systems Ventilateur médical à entrées d'air protégées par des filtres agencés dans une cassette de filtration commune détachable
AT525251A4 (de) * 2021-12-15 2023-02-15 Avl List Gmbh Luftfiltervorrichtung
US12036503B2 (en) 2019-06-07 2024-07-16 Mann+Hummel Gmbh Filter element and filter system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3405140A1 (de) * 1984-02-14 1985-08-22 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Verfahren zur belueftung von fahrzeugkabinen
US5968215A (en) * 1998-01-20 1999-10-19 Dana Corporation Combined inlet outlet air filter element
JP2009203899A (ja) 2008-02-28 2009-09-10 Toyota Boshoku Corp フィルタエレメント及びエアクリーナ
US20090241490A1 (en) 2008-03-30 2009-10-01 Lack Nicholas L Filter with multiple sections of different media
US20120079942A1 (en) 2010-09-30 2012-04-05 Steve David Hiner Filtration system and method of design
DE102010042424A1 (de) 2010-10-13 2012-04-19 Mahle International Gmbh Adsorberelement, Ringfilterelement
DE102013011457A1 (de) 2012-07-11 2014-01-16 Mann + Hummel Gmbh Luftfilter für die Innenraumluft von Kabinen von Fahrzeugen, Land-, Bau- und Arbeitsmaschinen
US20160016458A1 (en) * 2014-07-18 2016-01-21 Caterpillar Inc. Cabin Air System
EP3081281A1 (fr) 2015-04-14 2016-10-19 Carl Freudenberg KG Filtre à manches et manche

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3405140A1 (de) * 1984-02-14 1985-08-22 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Verfahren zur belueftung von fahrzeugkabinen
US5968215A (en) * 1998-01-20 1999-10-19 Dana Corporation Combined inlet outlet air filter element
JP2009203899A (ja) 2008-02-28 2009-09-10 Toyota Boshoku Corp フィルタエレメント及びエアクリーナ
US20090241490A1 (en) 2008-03-30 2009-10-01 Lack Nicholas L Filter with multiple sections of different media
US20120079942A1 (en) 2010-09-30 2012-04-05 Steve David Hiner Filtration system and method of design
DE102010042424A1 (de) 2010-10-13 2012-04-19 Mahle International Gmbh Adsorberelement, Ringfilterelement
DE102013011457A1 (de) 2012-07-11 2014-01-16 Mann + Hummel Gmbh Luftfilter für die Innenraumluft von Kabinen von Fahrzeugen, Land-, Bau- und Arbeitsmaschinen
US20160016458A1 (en) * 2014-07-18 2016-01-21 Caterpillar Inc. Cabin Air System
EP3081281A1 (fr) 2015-04-14 2016-10-19 Carl Freudenberg KG Filtre à manches et manche

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3421112A1 (fr) * 2017-06-28 2019-01-02 Mann+Hummel GmbH Élément filtrant plat, en particulier destiné à la filtration de gaz
KR20190001938A (ko) * 2017-06-28 2019-01-07 만 운트 훔멜 게엠베하 특히 가스 여과를 위한 평면 필터 엘리먼트
KR102662422B1 (ko) 2017-06-28 2024-04-29 만 운트 훔멜 게엠베하 특히 가스 여과를 위한 평면 필터 엘리먼트
US12036503B2 (en) 2019-06-07 2024-07-16 Mann+Hummel Gmbh Filter element and filter system
EP3881884A1 (fr) * 2020-03-18 2021-09-22 Air Liquide Medical Systems Ventilateur médical à entrées d'air protégées par des filtres agencés dans une cassette de filtration commune détachable
US20210290874A1 (en) * 2020-03-18 2021-09-23 Air Liquide Medical Systems Medical ventilator with air inlets that are protected by filters arranged in a detachable common filtration cartridge
AT525251A4 (de) * 2021-12-15 2023-02-15 Avl List Gmbh Luftfiltervorrichtung
AT525251B1 (de) * 2021-12-15 2023-02-15 Avl List Gmbh Luftfiltervorrichtung

Similar Documents

Publication Publication Date Title
EP2996791B1 (fr) Élément de filtre, en particulier élément de filtre à air, et système de filtre pourvu d'un élément de filtre
EP3903906B1 (fr) Méthode de purification de l'air
EP1669125B2 (fr) Procédé de purification d'air comprimé issu des systèmes de production d'air comprimé d'un véhicule à moteur, et cartouche pour sa mise en oeuvre
WO2018158387A1 (fr) Élément filtrant, filtre, dispositif de filtration et utilisation du filtre
DE112014002458B4 (de) Luftfilterelement für die Innenraumluft von Kabinen von Fahrzeugen, Land-, Bau- und Arbeitsmaschinen, Luftfiltersystem und Verfahren
EP2939725A1 (fr) Élément de filtre à air pour espaces intérieurs
DE102009030897A1 (de) Lufttrocknerpatrone für eine Druckluftaufbereitungsanlage eines Fahrzeugs und Verfahren zur Herstellung einer Lufttrocknerpatrone
DE102011116520A1 (de) Luftfilterpatrone zur Druckluftaufbereitung für eine Druckluftaufbereitungsanlage
DE102014016300B4 (de) Filter sowie Verwendung eines Hohlfilterelements in diesem Filter
DE102015016446A1 (de) Schutzfiltervorrichtung, Innenraumluftfiltersystem sowie Verfahren zur Reinigung von mit Schadgasen und/oder Aerosolen und/oder Feststoffpartikelstaub beladener Luft
DE102017001923A1 (de) Filterelement, Filter, Filteranlage und Verwendung des Filters
WO2017021470A1 (fr) Cartouche pour masque de protection respiratoire et masque de protection respiratoire
DE102018119220B3 (de) Filterelement zur Filtration und Entfeuchtung eines Gases und Filtereinrichtung
WO2017198427A1 (fr) Élément filtrant de pile à combustible et système filtrant de pile à combustible pourvu d'un élément filtrant de pile à combustible
DE102010005114A1 (de) Filterelement und Filteranordnung
EP3211205A1 (fr) Module de nettoyage, élément de filtre et système de filtre
EP2703057A2 (fr) Nettoyeur pour fluide
WO2023169796A1 (fr) Module de filtre à air ambiant intérieur et ensemble filtre
WO2024099963A1 (fr) Appareil de filtration
DE102009049156A1 (de) Luftfilter
WO2024170195A1 (fr) Élément filtrant et système de filtration
DE102022125471A1 (de) Filterelement und Filtervorrichtung
WO2004035177A1 (fr) Element de filtrage par adsorption

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18714705

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18714705

Country of ref document: EP

Kind code of ref document: A1