EP3919820B1 - Fume extraction device with odour filter element comprising a filter body with at least one adsorbent wrap and use of an odour filter - Google Patents
Fume extraction device with odour filter element comprising a filter body with at least one adsorbent wrap and use of an odour filter Download PDFInfo
- Publication number
- EP3919820B1 EP3919820B1 EP21173671.5A EP21173671A EP3919820B1 EP 3919820 B1 EP3919820 B1 EP 3919820B1 EP 21173671 A EP21173671 A EP 21173671A EP 3919820 B1 EP3919820 B1 EP 3919820B1
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- EP
- European Patent Office
- Prior art keywords
- adsorbent
- extraction device
- vapor extraction
- winding
- filter
- Prior art date
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
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- 239000004519 grease Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005342 ion exchange Methods 0.000 claims description 3
- 239000011149 active material Substances 0.000 claims description 2
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- 239000002808 molecular sieve Substances 0.000 claims description 2
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- 239000011796 hollow space material Substances 0.000 claims 4
- 238000005341 cation exchange Methods 0.000 claims 1
- 229910052615 phyllosilicate Inorganic materials 0.000 claims 1
- 235000019645 odor Nutrition 0.000 description 57
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- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
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- 229920003043 Cellulose fiber Polymers 0.000 description 1
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- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2035—Arrangement or mounting of filters
Definitions
- the present invention relates to a vapor extraction device with an odor filter element comprising a filter body with at least one adsorbent coil and the use of an odor filter element comprising a filter body with at least one adsorbent coil in a vapor extraction device
- Vapor extraction devices also called extractor hoods
- Undercounter variants are also called downdraft or table fan systems, where the extractor hood is integrated into the hob.
- These are installed in kitchens, both private and professional, in the area of a cooking area and are designed to extract cooking fumes, the so-called vapors, in order to keep the air in the kitchen free of odors and/or pollutants that arise during cooking /or roasts arise.
- Both designs usually have a grease filter, which is provided on the inlet side as the first filter stage and protects the device components of the vapor extraction device from contamination and damage.
- a generic vapor extraction device is used, for example, in the DE 20 2005 002 589 U1 described.
- Adsorbent beds usually made of activated carbon, which are filled into chambers of an odor filter frame through which fluid can flow, are often used as odor filters.
- this has the disadvantage that the separation efficiency for odor-active components depends on the volumetric degree of filling of the chambers; If the chambers are only partially filled, bypass flow paths can open between them Loose particles form which reduce efficiency.
- such bulk-based odor filters are designed as hollow cylindrical filter cartridges, which have a filling volume with a circular cross-section, which is present between an inner fluid-permeable jacket wall and an outer fluid-permeable jacket wall and is filled with the adsorbent bed. Since the casing walls are usually designed as perforated plates, there is also the problem that the smallest adsorbent components pass through the openings in the perforated plates, which results in increased dust pollution when handling and/or operating the cartridges.
- the odor filter as a pleated combination filter, which has a folded filter medium comprising at least one particle filter layer and at least one adsorbent layer, which is pleated to form a bellows.
- a pleated combination filter which has a folded filter medium comprising at least one particle filter layer and at least one adsorbent layer, which is pleated to form a bellows.
- An extractor hood with a pleated combination filter as an odor filter is, for example, from the EP 2 506 953 B1 known.
- the object of the present invention is therefore to create a vapor extraction device which is characterized by a significantly increased service life of the odor filter and an improved separation efficiency for odor-active components.
- the vapor extraction device comprises a housing with an air intake opening and an air exhaust opening and a fan-motor unit arranged in the housing.
- a fan-motor unit arranged in the housing.
- the odor filter element In an operating state, the odor filter element is flowed through in the radial direction.
- the odor filter element has a hollow cylindrical filter body with an inner cavity.
- the filter body has at least one adsorbent coil comprising a plurality of spirally arranged coil layers with at least one adsorbent.
- a winding arrangement allows significantly more adsorbent volume to be arranged in a predetermined volume than with a pleated odor filter, so that the adsorption capacity available per volume in the vapor extraction device according to the invention is significantly increased compared to the prior art.
- a winding arrangement within the odor filter also does not have the disadvantage of bypass channel formation described above in relation to the bed configuration: Since the individual winding layers of the adsorbent winding lie adjacent to one another in the radial direction, the flow always takes place from layer to layer without the existence of bypass flow paths in which one Flow through would be possible without contact with the adsorbent.
- the odor filter element can be replaced with almost no dust pollution, since the adsorbent is retained within the winding layers.
- the odor filter element is flowed through in the radial direction, in particular from radially inside to radially outside.
- a flow from radially outside to radially inside is also covered by the invention.
- the raw side is located in the area of the inner cavity of the hollow cylindrical filter body.
- the adsorbent can in principle be any adsorbent that appears suitable to a person skilled in the art in the kitchen environment and which enables appropriate odor adsorption.
- the motor of the blower motor unit is preferably an electric motor which drives a fan wheel.
- the fan wheel can be designed as a radial, diagonal or axial impeller, which the expert will select accordingly depending on the requirements of the p-V system characteristic.
- the blower-motor unit in particular has a blower housing which has an air inlet connection and an air outlet connection, with the air inlet connection being supplied with contaminated air from the air intake opening of the housing during operation and cleaned air being supplied to the air outlet opening of the housing via the air outlet connection, so that this then can either be returned to a kitchen room or released into the environment.
- the filter body can have at least one particle filter that is fluidly coupled to the at least one adsorbent coil.
- the particle filter can be used to separate suspended solids and other particles from the vapor that cannot be separated by the adsorbent coil.
- the particle filter can be connected upstream and/or downstream of the adsorbent coil, with explicit combinations also being possible.
- the particle filter can in particular be arranged on an inner and/or outer surface of the adsorbent coil.
- the cross-section of the particle filter has the shape of a circular ring, the diameter of which corresponds to the diameter of the adsorbent coil on its inner and/or outer circumference.
- the particle filter can be in the form of a flat layer, which is joined together in abutting manner to form a circular ring in cross section, so that it can be pulled over the outside of the adsorbent coil and/or inserted into the inner cavity.
- the particle filter has a filter medium that can be folded, preferably star-folded.
- the filter medium itself can be a single-layer or multi-layer filter medium, in particular a nonwoven medium which has cellulose fibers and/or plastic fibers.
- the filter medium can be a spunbond material, in particular a polyethylene terephthalate or polypropylene spunbond material, and/or have a needle-punched nonwoven material, in particular a polypropylene or polyethylene terephthalate needle-punched nonwoven, and/or have a meltblown layer and/or have a multi-component fiber material, in particular with bicomponent fibers with a polypropylene/polyacrylonitrile component.
- the at least one adsorbent can be at least one material from the group comprising activated carbon, zeolites, silica gels, metal oxides, molecular sieves and layered silicates. Impregnated and unimpregnated activated carbons are particularly relevant for the kitchen area.
- the activated carbon itself can also have a plurality of different activated carbons, each of which can have a different target gas spectrum.
- impregnated activated carbons can be used, preferably acid-impregnated activated carbons.
- impregnated activated carbon types can also be used mixed with non-impregnated, steam-activated standard carbons in one layer or these are applied in adjacent layers.
- the raw material for activated carbon is usually coconut shells, which are steam activated in a rotary kiln or in a fluidized bed reactor.
- the adsorbent particles in particular the activated carbon particles, can have a grain size of 10 to 80 mesh, in particular 30 to 60 mesh.
- the at least one adsorbent wrap can have at least one further active material in addition to the adsorbent, preferably an ion exchange material, in particular a cation exchanger or “acidic” ion exchanger.
- Ion exchange materials have, in particular, improved adsorption of trimethylamine compared to activated carbon.
- the adsorbent winding comprises a plurality of winding layers, for example at least four winding layers, preferably at least six winding layers.
- the specialist can easily determine the maximum possible number of winding layers for each individual case based on the influencing factors of the fan characteristic curve, system characteristic curve and the desired maximum volume flow.
- the winding layers of the adsorbent roll comprise an air-permeable carrier layer, in particular a nonwoven material layer, with the at least one adsorbent in particle and/or granule form being arranged on the carrier layer.
- the carrier layer is wound in a spiral shape together with the adsorbent arranged thereon.
- the nonwoven material layer preferably comprises at least 90% synthetic fibers, in particular PET fibers.
- a basis weight of the nonwoven material layer is 25 to 75 g/m 2 in versions.
- an air permeability of the nonwoven material layer can be over 3000 l/m 2 s in embodiments, preferably over 4000 l/m 2 s.
- the winding layers of the adsorbent winding can comprise a particle filter layer, which preferably covers the adsorbent on a side facing away from the carrier layer.
- a flat layer composite of carrier layer-adsorbent-particle filter layer is preferably wound spirally to produce the adsorbent coil.
- a range between 200 and 1200 g/m 2 is considered technically sensible, since there is an advantageous relationship between the pressure loss and the adsorption capacity provided.
- the adsorbent particles are immobilized with respect to the carrier layer; This can be done using hot melt adhesive threads, which are applied as a thin network during the production of the combination filter medium.
- the carrier layer can in particular have an air permeability at 200 Pa of greater than 3000 l/m 2 s and/or a basis weight between 25 g/m 2 and 75 g/m 2 . According to the invention, the air permeability of the carrier layer is greater than the air permeability of a filter medium of the particle filter.
- the carrier layer can be very air-permeable spun-laid media and/or spunbonds.
- the winding layers of the adsorbent winding have an end edge that is sealed or sealed.
- the sealing or sealing of the end edge(s) of the winding layers prevents adsorbent present in the winding layers from trickling out of the adsorbent winding at its axial end faces, thereby resulting in a loss of adsorption capacity. This is particularly important to ensure in applications close to the motor or fan where vibrations always occur.
- the sealing or sealing of the front edges of the winding layers of the adsorbent coil can form a front end plate. This can already be formed when the adsorbent coil is wound up.
- a sealing can take place via a closure element at the two lateral ends of a flat starting material of the winding layers along the winding direction (circumferentially).
- a closure element can be formed via an adhesive, foam, thermoplastic, clip, welding process or a combination of the aforementioned options. It is also conceivable to use hot glue directly during the winding process if the subsequent winding layer is wound onto the previous winding layer and the hot glue in the edge area of the winding layers is still sufficiently liquid to bond sealingly with the adhesive of the previous winding layer.
- the sealing on the end faces can also be carried out by subsequent thermoplastic forming by melting and deforming a sealing element onto the respective end face.
- the melting can take place, for example, using ultrasound, heating mirrors, infrared radiation, hot air and the deformation can be done by pressing the sealing element onto the end face and over its outer edge.
- the odor filter element can have a closed end disk and/or an open end disk with an opening.
- the adsorbent coil of the filter body is fluid-tight with the closed one End disk and / or the open end disk connected, for example glued or welded.
- the opening in the open end plate serves for the fluidic connection of the odor filter element and opens into the inner cavity of the filter body. “Closed” end plate means that this end plate does not have an opening in the axial direction, but is designed to be fluid-tight.
- the closed end plate and/or the open end plate can have or consist of a plastic, in particular polyvinyl chloride and/or polypropylene and/or polyamide and/or polyurethane, in particular foamed polyurethane, in particular with corresponding flame retardant additives.
- a plastic in particular polyvinyl chloride and/or polypropylene and/or polyamide and/or polyurethane, in particular foamed polyurethane, in particular with corresponding flame retardant additives.
- a metal in particular from (galvanized) steel.
- suitable plastics are acrylonitrile-butadiene-styrene, thermoplastic elastomers and/or silicones.
- the odor filter element can be designed without a support element.
- a rigidity of the odor filter element in particular a bending rigidity about a radial axis and/or a torsional rigidity about a longitudinal axis and/or a compressive rigidity about a longitudinal axis, is provided here exclusively by the filter body with the adsorbent coil.
- “No support element” means in particular that the odor filter element has no center tube, support tube and/or support sleeves, which are arranged either in the inner cavity of the filter body or surrounding it radially on the outside.
- Such a design without support elements offers the advantage of being particularly simple and, due to the small number of parts, also particularly cost-effective.
- such odor filters without supporting elements can be easily used thermally and/or recycled after the end of their service life.
- the odor filter element may comprise a fluid-permeable outer support jacket which surrounds the filter body radially on the outside, and/or may comprise a fluid-permeable inner support sleeve which is present in the inner cavity.
- the outer support jacket and/or the inner support sleeve can have a large number of openings distributed over their surface in order to enable fluid permeability. They can in particular be formed from a sheet metal, in particular a perforated sheet metal.
- the design of the odor filter element has an outer support jacket and/or the inner support sleeve the advantage that the odor filter element is mechanically very resilient, both in terms of pressure and torsion or bending, since the mechanical loads do not have to be passed through the filter body, but are absorbed by the outer support jacket and / or the inner support sleeve.
- the outer support jacket also allows shock protection, which protects the filter body of the odor filter element from damage caused by improper handling.
- the odor filter element has a grease filter arranged upstream in terms of use, which comprises a fluid-permeable outer jacket which surrounds the filter body radially on the outside, and/or comprises a fluid-permeable inner sleeve which is present in the inner cavity.
- the grease filter can be designed to be detachable from the filter body in order to be able to clean it regularly.
- the grease filter can in particular comprise a metal mesh, a metal fleece and/or an expanded metal mesh.
- the odor filter element has at least one circumferential seal, in particular an axial and/or radial seal, which is present in particular on the open end disk and extends completely around the opening of the open end disk.
- the seal can also be made in one piece with the end disk, which is particularly advantageous in versions that have an end disk made of (foamed) PUR material.
- the odor filter element can be present on a pressure side or on a suction side of the blower-motor unit.
- the odor filter element can be connected to a separate housing unit connected to the system via a duct.
- the vapor extraction device additionally has a grease filter, which in particular spans the air intake opening of the housing.
- the grease filter can be in the form of a separator plate with a wire mesh and is primarily used to pre-separate coarse impurities. This is preferably a washable filter.
- the grease filter has no odor-absorbing effect.
- the housing can have a blow-out housing part, for example in the form of a chimney.
- the odor filter element can be present in a cavity provided by the blow-out housing part.
- This cavity of the blow-out housing part is often empty in known vapor extraction devices in superstructure design and serves exclusively as an air duct. This installation space can now be used according to the invention.
- the vapor extraction device is designed as a vapor extraction hood, with the air intake opening being present at the bottom in the direction of gravity when installed as intended.
- the odor filter element has a hollow cylindrical filter body with an inner cavity, the filter body having at least one adsorbent coil comprising a plurality of spirally arranged coil layers with at least one adsorbent.
- the odor filter element is flowed through in the radial direction relative to its longitudinal axis.
- a vapor extraction device 10 according to the invention is shown in a perspective view, for example in a superstructure design as an extractor hood.
- This has a housing 1 which has an air intake opening 14 and an air exhaust opening 15.
- the housing has a suction housing part 12, a blow-out housing part or chimney 11 and a transition housing part 13, which connects the suction housing part 12 to the blow-out housing part or chimney 11 and is inclined at an obtuse angle relative to the latter.
- the air intake opening 14 is spanned by a grease filter 141, which can be designed as a wire mesh and is in particular washable and therefore reusable.
- a fan-motor unit 3 is arranged inside the housing, which is designed to generate an air flow from the air intake opening 14 to the air exhaust opening 15 and thereby overcome a pressure loss of the odor filter 2, which is arranged in the flow path between the air intake opening 14 and the air exhaust opening 15.
- the odor filter 2 is arranged on a pressure side of the blower motor unit 3. In other embodiments not shown figuratively, the flow through the odor filter 2 can also take place in the opposite direction.
- the odor filter 2 can be flowed through in the radial direction relative to its longitudinal axis and has a hollow cylindrical filter body 2' (see Fig. 3 ) with an inner cavity, with the raw side inside the inner cavity and the clean side outside.
- the odor filter 2 is closed at the axial end by a closed end plate 21.
- the odor filter 2 is arranged in a particularly space-saving manner in a cavity 111 within the blow-out housing part or chimney 11.
- the vapor extraction device 10 is shown in a longitudinal sectional view, the sectional plane running through the central longitudinal plane of the odor filter 2.
- the fan-motor unit 3 has a fan 32 which is driven by an electric motor 31.
- the blower 32 has an inlet port 34 through which contaminated air can be sucked through the air intake opening 14 of the housing 1 is and an outlet connection 33 through which the contaminated air can be fed to the odor filter element 2.
- the odor filter element 2 is connected in a fluid-tight manner to the outlet connection 33, with a seal 23 present on the odor filter element 2 serving for sealing purposes.
- the odor filter element 2 has a filter body 2 ', which includes at least one adsorbent coil 22.
- the adsorbent coil 22 has a plurality of spirally arranged coil layers with at least one adsorbent.
- the adsorbent can preferably be one or different activated carbons.
- the at least one adsorbent is arranged on a carrier layer and immobilized (e.g. by hot-melt adhesive threads) and the carrier layer is then wound up so that the plurality of wrapping layers are subsequently arranged in a spiral shape.
- the odor filter element 2 has an open end disk, on which the seal 23 is present, and a closed end disk 21.
- the end disks 23,24 can have a plastic or consist of it. Alternatively, one or both of the end disks 23, 24 can also be made of a metal, in particular steel. The end disks 23, 24 can be glued and/or welded to the filter body 2'.
- the seal 23 is formed in one piece with the open end plate 24. This is particularly advantageous if the open end plate consists of a foamed polyurethane.
- an odor filter 2 for the vapor extraction device 10 is shown in a first embodiment.
- This has a hollow cylindrical filter body 2 'with an inner cavity, with the adsorbent coil 22 being present radially on the inside adjacent to the cavity.
- Radially on the outside, the adsorbent coil 22 is surrounded by a particle filter 25, which includes a star-shaped folded filter medium, which is connected to a circumferentially closed bellows.
- the particle filter 25 would therefore be present on the downstream side of the adsorbent coil 22.
- Adsorbent coil 22 and particle filter 25 are connected at their axial ends to end disks, with a closed end disk 21 and an open end disk 24 with an opening 241 being provided.
- the open end disk consists of a foamed polyurethane and is formed in one piece with the seal 23, which completely encloses the opening 241.
- the seal 23 is trapezoidal in cross section and extends from a surface of the end plate in the axial direction thereof.
- the odor filter 2 is designed without a support element (no center pipe).
- a bending stiffness around a radial axis and/or a torsional stiffness around a longitudinal axis and/or a compressive stiffness around a longitudinal axis is provided exclusively by the filter body with the adsorbent coil 22 and the particle filter 25.
- the end disks 23, 24 also serve to seal the end edges of the winding layers of the adsorbent coil 22, so that adsorbent (usually activated carbon) provided therein cannot trickle out.
- the one in the Fig. 6 and Fig. 7 The odor filter 2 shown differs from this in that the filter body 2 'does not have a particle filter, but only the adsorbent coil 22. Otherwise, this corresponds to the first embodiment.
- an odor filter 2 is shown according to a third embodiment. From the first embodiment ( Fig. 4 , 5 ) this differs in that there is an inner support sleeve 27 adjacent to the adsorbent coil 22 radially on the inside and an outer support jacket 26 is present adjacent to the particle filter 25 radially on the outside. Both the outer support jacket 26 and the inner support sleeve 27 are designed to be fluid-permeable, namely as a perforated sheet metal. The outer support jacket 26 and/or the inner support sleeve 27 are connected to the end disks 23, 24 and can thus absorb mechanical loads without these having to be passed through the filter body 2'. The outer support jacket 26 also provides shock protection, which protects the filter body 2' from damage caused by handling.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Materials (AREA)
- Separation Of Gases By Adsorption (AREA)
Description
Die vorliegende Erfindung betrifft eine Wrasenabzugsvorrichtung mit einem Geruchsfilterelement umfassend einen Filterkörper mit wenigstens einem Adsorbenswickel und die Verwendung eines Geruchsfilterelements umfassend einen Filterkörper mit wenigstens einem Adsorbenswickel in einer WrasenabzugsvorrichtungThe present invention relates to a vapor extraction device with an odor filter element comprising a filter body with at least one adsorbent coil and the use of an odor filter element comprising a filter body with at least one adsorbent coil in a vapor extraction device
Wrasenabzugsvorrichtungen, auch Dunstaubzugshauben genannt, sind aus dem Stand der Technik in Form von Überbau- bzw. Überkopf- und Unterbauvarianten bekannt. Unterbauvarianten werden auch Downdraft- bzw. Tischlüfter-Systeme genannt, wobei hier der Dunstabzug in das Kochfeld integriert ist. Diese werden in Küchen, sowohl im privaten als auch professionellen Umfeld, im Bereich einer Kochstelle installiert und sind dazu ausgebildet, Kochdämpfe, den so genannten Wrasen, abzusaugen, um die Luft in der Küche von Gerüchen und/oder Schadstoffen freizuhalten, die beim Kochen und/oder Braten entstehen. Es gibt hierbei Bauformen, welche dazu ausgebildet sind, den Wrasen über eine entsprechende Verrohrung ins Freie zu befördern und Bauformen, welche rezirkulierend arbeiten, d. h. den Wrasen absaugen und nach Reinigung in einem Geruchsfilterelement wieder der Küchenluft zuführen.Vapor extraction devices, also called extractor hoods, are known from the prior art in the form of superstructure or overhead and substructure variants. Undercounter variants are also called downdraft or table fan systems, where the extractor hood is integrated into the hob. These are installed in kitchens, both private and professional, in the area of a cooking area and are designed to extract cooking fumes, the so-called vapors, in order to keep the air in the kitchen free of odors and/or pollutants that arise during cooking /or roasts arise. There are designs that are designed to transport the vapor outside via appropriate piping and designs that work recirculating, i.e. H. Suction out the vapors and, after cleaning them in an odor filter element, return them to the kitchen air.
Beide Bauformen haben in der Regel einen Fettfilter, welcher eintrittsseitig als erste Filterstufe vorgesehen ist und die Vorrichtungsbestandteile der Wrasenabzugsvorrichtung vor Verschmutzung und Beschädigung schützt.Both designs usually have a grease filter, which is provided on the inlet side as the first filter stage and protects the device components of the vapor extraction device from contamination and damage.
Eine gattungsgemäße Wrasenabzugsvorrichtung wird beispielsweise in der
Weiterer Stand der Technik wird in
Als Geruchsfilter kommen häufig Adsorbensschüttungen, meistens aus Aktivkohle, zum Einsatz, welche in fluiddurchströmbare Kammern eines Geruchsfilterrahmens eingefüllt sind. Dies hat jedoch den Nachteil, dass die Abscheideeffizienz für geruchsaktive Bestandteile von dem volumetrischen Füllungsgrad der Kammern abhängt; bei nur teilweiser Befüllung der Kammern können sich Bypassströmungswege zwischen den Schüttungspartikeln bilden, welche die Effizienz mindern. Solche schüttungsbasierten Geruchsfilter sind gemäß einer möglichen Bauform als hohlzylindrische Filterkartuschen ausgeführt, die ein im Querschnitt kreisringförmiges Befüllungsvolumen haben, das zwischen einer inneren fluiddurchlässigen Mantelwand und einer äußeren fluiddurchlässigen Mantelwand vorliegt und mit der Adsorbensschüttung gefüllt ist. Da die Mantelwände meistens als Lochblech ausgeführt sind, besteht ferner das Problem, dass kleinste Adsorbensbestandteile die Öffnungen im Lochblech passieren, was eine erhöhte Staubbelastung bei der Handhabung und/oder beim Betrieb der Kartuschen zur Folge hat.Adsorbent beds, usually made of activated carbon, which are filled into chambers of an odor filter frame through which fluid can flow, are often used as odor filters. However, this has the disadvantage that the separation efficiency for odor-active components depends on the volumetric degree of filling of the chambers; If the chambers are only partially filled, bypass flow paths can open between them Loose particles form which reduce efficiency. According to a possible design, such bulk-based odor filters are designed as hollow cylindrical filter cartridges, which have a filling volume with a circular cross-section, which is present between an inner fluid-permeable jacket wall and an outer fluid-permeable jacket wall and is filled with the adsorbent bed. Since the casing walls are usually designed as perforated plates, there is also the problem that the smallest adsorbent components pass through the openings in the perforated plates, which results in increased dust pollution when handling and/or operating the cartridges.
Es ist aber auch bekannt, den Geruchsfilter als plissierten Kombifilter auszuführen, der ein gefaltetes Filtermedium umfassend zumindest eine Partikelfilterlage und zumindest eine Adsorbenslage aufweist, welches zu einem Faltenbalg plissiert ist. Das beschriebene Problem mit den Bypassströmungswegen stellt sich hier nicht.However, it is also known to design the odor filter as a pleated combination filter, which has a folded filter medium comprising at least one particle filter layer and at least one adsorbent layer, which is pleated to form a bellows. The problem described with the bypass flow paths does not arise here.
In einem als plissierten Kombifilter ausgebildeten Geruchsfilter lässt sich jedoch nur ein vergleichsweise kleines Adsorbensvolumen unterbringen, da die Belegungsmenge (Masse pro Fläche) begrenzt ist, weshalb die Lebensdauer und Abscheideeffizienz für geruchsaktive Bestandteile eines als plissierten Kombifilter ausgebildeten Geruchsfilters in gleichem Maße begrenzt ist. Gerade für den professionellen Einsatz, bei dem eine Wrasenabzugsvorrichtung über mehrere Stunden täglich im Einsatz ist, ist dies mit einem hohen Wartungsaufwand verbunden, da die Geruchsfilter häufig ausgetauscht werden müssen.However, only a comparatively small adsorbent volume can be accommodated in an odor filter designed as a pleated combination filter, since the amount of occupancy (mass per area) is limited, which is why the service life and separation efficiency for odor-active components of an odor filter designed as a pleated combination filter is limited to the same extent. Especially for professional use, where a vapor extraction device is used for several hours a day, this requires a lot of maintenance because the odor filters have to be replaced frequently.
Eine Dunstabzusgaube mit einem plissierten Kombifilter als Geruchsfilter ist beispielsweise aus der
Aufgabe der vorliegenden Erfindung ist es daher, eine Wrasenabzugsvorrichtung zu schaffen, welche sich durch eine deutlich erhöhte Lebensdauer des Geruchsfilters und eine verbesserte Abscheideeffizienz für geruchsaktive Bestandteile auszeichnet.The object of the present invention is therefore to create a vapor extraction device which is characterized by a significantly increased service life of the odor filter and an improved separation efficiency for odor-active components.
Diese Aufgabe wird durch eine Wrasenabzugsvorrichtung mit den Merkmalen des Anspruchs 1 sowie durch eine Verwendung mit den Merkmalen des Anspruchs 17 gelöst.This object is achieved by a vapor extraction device with the features of
Bevorzugte Weiterbildungen der Erfindung sind in den Unteransprüchen aufgeführt.Preferred developments of the invention are listed in the subclaims.
Die erfindungsgemäße Wrasenabzugsvorrichtung umfasst ein Gehäuse mit einer Lufteinsaugöffnung und einer Luftausblasöffnung sowie eine in dem Gehäuse angeordnete Gebläse-Motor-Einheit. Strömungsmäßig zwischen der Lufteinsaugöffnung und der Luftausblasöffnung liegt ein Geruchsfilterelement vor, das bezogen auf seine Längsachse in Radialrichtung durchströmbar ist. In einem Betriebszustand wird das Geruchsfilterelement in Radialrichtung durchströmt. Das Geruchsfilterelement weist einen hohlzylindrischen Filterkörper mit einem inneren Hohlraum auf. Der Filterkörper weist wenigstens einen Adsorbenswickel umfassend eine Mehrzahl spiralförmig angeordnete Wickellagen mit wenigstens einem Adsorbens auf.The vapor extraction device according to the invention comprises a housing with an air intake opening and an air exhaust opening and a fan-motor unit arranged in the housing. In terms of flow, there is an odor filter element between the air intake opening and the air outlet opening, through which flow can flow in the radial direction relative to its longitudinal axis. In an operating state, the odor filter element is flowed through in the radial direction. The odor filter element has a hollow cylindrical filter body with an inner cavity. The filter body has at least one adsorbent coil comprising a plurality of spirally arranged coil layers with at least one adsorbent.
Eine Wickelanordnung erlaubt es in einem vorbestimmten Volumen deutlich mehr Adsorbensvolumen anzuordnen als bei einem plissierten Geruchsfilter, sodass die pro Volumen zur Verfügung stehende Adsorptionskapazität bei der Wrasenabzugsvorrichtung gemäß der Erfindung gegenüber dem Stand der Technik deutlich erhöht ist. Eine Wickelanordnung innerhalb des Geruchsfilters weist zudem nicht den oben im Bezug zu der Schüttungskonfiguration beschriebenen Nachteil einer Bypasskanalbildung auf: Da die einzelnen Wickellagen des Adsorbenswickels in Radialrichtung benachbart aufeinander liegen, erfolgt die Durchströmung stets von Lage zu Lage ohne dass Bypassströmungswege existieren würden, in welchen eine Durchströmung ohne Kontakt zum Adsorbens möglich wäre.A winding arrangement allows significantly more adsorbent volume to be arranged in a predetermined volume than with a pleated odor filter, so that the adsorption capacity available per volume in the vapor extraction device according to the invention is significantly increased compared to the prior art. A winding arrangement within the odor filter also does not have the disadvantage of bypass channel formation described above in relation to the bed configuration: Since the individual winding layers of the adsorbent winding lie adjacent to one another in the radial direction, the flow always takes place from layer to layer without the existence of bypass flow paths in which one Flow through would be possible without contact with the adsorbent.
Gegenüber den aus dem Stand der Technik bekannten hohlzylindrischen Filterkartuschen, die eine Adsorbensschüttung beinhalten, besteht ferner der Vorteil, dass bei der erfindungsgemäßen Wrasenabzugsvorrichtung der Austausch des Geruchsfilterelements nahezu ohne Staubbelastung erfolgen kann, da das Adsorbens innerhalb der Wickellagen zurückgehalten wird.Compared to the hollow cylindrical filter cartridges known from the prior art, which contain an adsorbent bed, there is also the advantage that in the vapor extraction device according to the invention, the odor filter element can be replaced with almost no dust pollution, since the adsorbent is retained within the winding layers.
Das Geruchsfilterelement wird, wie erwähnt, in Radialrichtung durchströmt, insbesondere von radial innen nach radial außen. Alternativ hierzu ist jedoch auch eine Durchströmung von radial außen nach radial innen von der Erfindung umfasst. Bei einer Durchströmung von innen nach außen, d. h. ausblasend, befindet sich die Rohseite im Bereich des inneren Hohlraums des hohlzylindrischen Filterkörpers.As mentioned, the odor filter element is flowed through in the radial direction, in particular from radially inside to radially outside. Alternatively, however, a flow from radially outside to radially inside is also covered by the invention. When the flow flows from the inside to the outside, ie blowing out, the raw side is located in the area of the inner cavity of the hollow cylindrical filter body.
Bei dem Adsorbens kann es sich grundsätzlich um jedes dem Fachmann im Küchenumfeld geeignet erscheinende Adsorbens handeln, welches eine entsprechende Geruchsadsorption ermöglicht.The adsorbent can in principle be any adsorbent that appears suitable to a person skilled in the art in the kitchen environment and which enables appropriate odor adsorption.
Der Motor der Gebläse-Motor-Einheit ist bevorzugt ein Elektromotor, welcher ein Lüfterrad antreibt. Das Lüfterrad kann als Radial-, Diagonal- oder Axiallaufrad ausgebildet sein, was der Fachmann je nach den Anforderungen der p-V-Systemkennlinie entsprechend auswählen wird. Die Gebläse-Motor-Einheit weist insbesondere ein Gebläsegehäuse auf, das einen Lufteintrittsstutzen und einen Luftaustrittsstutzen aufweist, wobei dem Lufteintrittsstutzen im Betrieb verunreinigte Luft von der Lufteinsaugöffnung des Gehäuses zugeführt wird und über den Luftaustrittsstutzen gereinigte Luft der Luftausblasöffnung des Gehäuses zugeführt wird, sodass diese dann entweder in einen Küchenraum zurückgeführt werden kann oder in die Umgebung entlassen wird.The motor of the blower motor unit is preferably an electric motor which drives a fan wheel. The fan wheel can be designed as a radial, diagonal or axial impeller, which the expert will select accordingly depending on the requirements of the p-V system characteristic. The blower-motor unit in particular has a blower housing which has an air inlet connection and an air outlet connection, with the air inlet connection being supplied with contaminated air from the air intake opening of the housing during operation and cleaned air being supplied to the air outlet opening of the housing via the air outlet connection, so that this then can either be returned to a kitchen room or released into the environment.
Gemäß einer bevorzugten Ausführungsform kann der Filterkörper zumindest einen strömungsmäßig mit dem wenigstens einem Adsorbenswickel gekoppelten Partikelfilter aufweisen. Über den Partikelfilter können Schwebstoffe und sonstige Partikel aus dem Wrasen abgeschieden werden, welche nicht durch den Adsorbenswickel abscheidbar sind. Der Partikelfilter kann dem Adsorbenswickel strömungsmäßig vorgeschaltet und/oder nachgeschaltet sein, wobei explizit auch Kombinationen möglich sind.According to a preferred embodiment, the filter body can have at least one particle filter that is fluidly coupled to the at least one adsorbent coil. The particle filter can be used to separate suspended solids and other particles from the vapor that cannot be separated by the adsorbent coil. The particle filter can be connected upstream and/or downstream of the adsorbent coil, with explicit combinations also being possible.
Der Partikelfilter kann insbesondere an einer inneren und/oder äußeren Mantelfläche des Adsorbenswickels angeordnet sein. Hierzu weist der Partikelfilter im Querschnitt die Form eines Kreisrings auf, dessen Durchmesser mit dem Durchmesser des Adsorbenswickels an seinem Innen- und/oder Außenumfang korrespondiert. Der Partikelfilter kann in Form einer Flachlage vorliegen, die entsprechend auf Stoß zusammengefügt ist, um im Querschnitt einen Kreisring zu bilden, sodass dieser außen über den Adsorbenswickel gezogen werden kann und/oder in den inneren Hohlraum eingeführt werden kann.The particle filter can in particular be arranged on an inner and/or outer surface of the adsorbent coil. For this purpose, the cross-section of the particle filter has the shape of a circular ring, the diameter of which corresponds to the diameter of the adsorbent coil on its inner and/or outer circumference. The particle filter can be in the form of a flat layer, which is joined together in abutting manner to form a circular ring in cross section, so that it can be pulled over the outside of the adsorbent coil and/or inserted into the inner cavity.
Der Partikelfilter weist in einer besonders bevorzugten Ausführungsform ein Filtermedium auf, das gefaltet sein kann, bevorzugt sterngefaltet. Das Filtermedium selbst kann ein ein- oder mehrlagiges Filtermedium sein, insbesondere ein Vliesmedium, welches Cellulosefasern und/oder Kunststofffasern aufweist. Beispielsweise kann das Filtermedium ein Spinnvliesmaterial sein, insbesondere ein Polyethylenterephthalat- oder Polypropylen-Spinnvliesmaterial, und/oder ein Nadelvliesmaterial, insbesondere ein Polypropylen- oder Polyethylenterephthalat-Nadelvlies, und/oder eine Meltblownlage aufweisen und/oder ein Mehrkomponentenfasermaterial, insbesondere mit Bikomponentenfasern mit einer Polypropylen/Polyacrylnitril-Komponente aufweisen.In a particularly preferred embodiment, the particle filter has a filter medium that can be folded, preferably star-folded. The filter medium itself can be a single-layer or multi-layer filter medium, in particular a nonwoven medium which has cellulose fibers and/or plastic fibers. For example, the filter medium can be a spunbond material, in particular a polyethylene terephthalate or polypropylene spunbond material, and/or have a needle-punched nonwoven material, in particular a polypropylene or polyethylene terephthalate needle-punched nonwoven, and/or have a meltblown layer and/or have a multi-component fiber material, in particular with bicomponent fibers with a polypropylene/polyacrylonitrile component.
Bei dem wenigstens einen Adsorbens kann es sich um wenigstens ein Material aus der Gruppe umfassend Aktivkohle, Zeolithe, Silicagele, Metalloxide, Molekularsiebe und Schichtsilikate handeln. Für den Küchenbereich sind besonders imprägnierte und unimprägnierte Aktivkohlen relevant.The at least one adsorbent can be at least one material from the group comprising activated carbon, zeolites, silica gels, metal oxides, molecular sieves and layered silicates. Impregnated and unimpregnated activated carbons are particularly relevant for the kitchen area.
Es können auch mehrere der vorgenannten Adsorbens in Kombination eingesetzt werden. Die Aktivkohle selbst kann auch eine Mehrzahl von verschiedenen Aktivkohlen aufweisen, welche jeweils ein unterschiedliches Zielgasspektrum haben können. Insbesondere können imprägnierte Aktivkohlen zum Einsatz kommen, bevorzugt sauer imprägnierte Aktivkohlen. Es können aber auch imprägnierte Aktivkohlesorten mit nicht-imprägnierten, wasserdampfaktivierten Standardkohlen in einer Schicht gemischt eingesetzt werden oder diese werden in aneinander angrenzenden Schichten aufgebracht. Das Rohmaterial der Aktivkohlen sind meist Kokosnussschalen, welche in einem Drehrohrofen oder in einem Wirbelschichtreaktor wasserdampfaktiviert werden.Several of the aforementioned adsorbents can also be used in combination. The activated carbon itself can also have a plurality of different activated carbons, each of which can have a different target gas spectrum. In particular, impregnated activated carbons can be used, preferably acid-impregnated activated carbons. However, impregnated activated carbon types can also be used mixed with non-impregnated, steam-activated standard carbons in one layer or these are applied in adjacent layers. The raw material for activated carbon is usually coconut shells, which are steam activated in a rotary kiln or in a fluidized bed reactor.
Alternativ oder zusätzlich können die Adsorbenspartikel, insbesondere die Aktivkohlepartikel, eine Korngröße von 10 bis 80 mesh, insbesondere 30 bis 60 mesh, aufweisen.Alternatively or additionally, the adsorbent particles, in particular the activated carbon particles, can have a grain size of 10 to 80 mesh, in particular 30 to 60 mesh.
Ferner kann der wenigstens eine Adsorbenswickel neben dem Adsorbens zumindest ein weiteres Aktivmaterial aufweisen, bevorzugt ein lonentauschermaterial, insbesondere einen Kationentauscher bzw. "sauren" Ionentauscher. Ionentauschermaterialien weisen gegenüber Aktivkohle insbesondere eine verbesserte Adsorption von Trimethylamin auf.Furthermore, the at least one adsorbent wrap can have at least one further active material in addition to the adsorbent, preferably an ion exchange material, in particular a cation exchanger or “acidic” ion exchanger. Ion exchange materials have, in particular, improved adsorption of trimethylamine compared to activated carbon.
In einer besonders bevorzugten Ausführungsform umfasst der Adsorbenswickel eine Mehrzahl Wickellagen, etwa zumindest vier Wickellagen, bevorzugt zumindest sechs Wickellagen. Je mehr Wickellagen vorgesehen werden, desto höher ist die Adsorptionskapazität. Die maximal mögliche Anzahl an Wickellagen kann der Fachmann für den individuellen Einzelfall anhand der Einflussgrößen Gebläsekennlinie, Systemkennlinie und gewünschter Maximalvolumenstrom leicht ermitteln.In a particularly preferred embodiment, the adsorbent winding comprises a plurality of winding layers, for example at least four winding layers, preferably at least six winding layers. The more wrapping layers are provided, the higher the adsorption capacity. The specialist can easily determine the maximum possible number of winding layers for each individual case based on the influencing factors of the fan characteristic curve, system characteristic curve and the desired maximum volume flow.
Die Wickellagen des Adsorbenswickels umfassen eine luftdurchlässige Trägerlage, insbesondere eine Vliesmateriallage, wobei auf der Trägerlage das wenigstens eine Adsorbens in Partikel- und/oder Granulatform angeordnet ist. Die Trägerlage wird zur Bildung des Adsorbenswickel zusammen mit dem darauf angeordneten Adsorbens spiralförmig aufgewickelt.The winding layers of the adsorbent roll comprise an air-permeable carrier layer, in particular a nonwoven material layer, with the at least one adsorbent in particle and/or granule form being arranged on the carrier layer. To form the adsorbent coil, the carrier layer is wound in a spiral shape together with the adsorbent arranged thereon.
Die Vliesmateriallage umfasst bevorzugt zu mindestens 90 % synthetische Fasern, insbesondere PET-Fasern. Ein Flächengewicht der Vliesmateriallage beträgt in Ausführungen 25 bis 75 g/m2. Alternativ oder zusätzlich kann eine Luftdurchlässigkeit der Vliesmateriallage in Ausführungen über 3000 l/m2s betragen, bevorzugt über 4000 l/m2s.The nonwoven material layer preferably comprises at least 90% synthetic fibers, in particular PET fibers. A basis weight of the nonwoven material layer is 25 to 75 g/m 2 in versions. Alternatively or additionally, an air permeability of the nonwoven material layer can be over 3000 l/m 2 s in embodiments, preferably over 4000 l/m 2 s.
Alternativ oder zusätzlich können die Wickellagen des Adsorbenswickels eine Partikelfilterlage umfassen, die bevorzugt das Adsorbens an einer der Trägerlage abgewandten Seite bedeckt. Gemäß dieser Ausführungsform wird bevorzugt ein flächiger Lagenverbund von Trägerlage-Adsorbens-Partikelfilterlage zur Herstellung des Adsorbenswickels spiralförmig aufgewickelt. Dies hat den Vorteil, dass das in Partikel- und/oder Granulatform vorliegende Adsorbens besonders sicher im Lagenverbund gehalten werden kann, was den Wickelvorgang vereinfacht, da ein unkontrolliertes "Herausrieseln" des Absorbens weitgehend unterbunden werden kann.Alternatively or additionally, the winding layers of the adsorbent winding can comprise a particle filter layer, which preferably covers the adsorbent on a side facing away from the carrier layer. According to this embodiment, a flat layer composite of carrier layer-adsorbent-particle filter layer is preferably wound spirally to produce the adsorbent coil. This has the advantage that the adsorbent, which is in particle and/or granular form, can be held particularly securely in the layer composite, which simplifies the winding process since uncontrolled "trickling out" of the absorbent can be largely prevented.
Hinsichtlich eines Flächengewichts einer Adsorbensauflage auf der Trägerlage wird ein Bereich zwischen 200 und 1200 g/m2 als technisch sinnvoll angesehen, da hier ein vorteilhaftes Verhältnis zwischen dem Druckverlust und der vorgehaltenen Adsorptionskapazität besteht.With regard to the basis weight of an adsorbent layer on the carrier layer, a range between 200 and 1200 g/m 2 is considered technically sensible, since there is an advantageous relationship between the pressure loss and the adsorption capacity provided.
Die Adsorbenspartikel sind bezüglich der Trägerlage immobilisiert; dies kann durch Schmelzkleberfäden, welche bei der Herstellung des Kombifiltermediums als dünnes Netzwerk aufgebracht werden, erfolgen. Die Trägerlage kann insbesondere eine Luftdurchlässigkeit bei 200 Pa von größer als 3000 l/m2s und/oder ein Flächengewicht zwischen 25 g/m2 und 75 g/m2 aufweisen. Die Luftdurchlässigkeit der Trägerlage ist erfindungsgemäß größer als die Luftdurchlässigkeit eines Filtermediums des Partikelfilters. Bei der Trägerlage kann es sich um sehr luftdurchlässige spinngelegte Medien und/oder Spinnvliese handeln.The adsorbent particles are immobilized with respect to the carrier layer; This can be done using hot melt adhesive threads, which are applied as a thin network during the production of the combination filter medium. The carrier layer can in particular have an air permeability at 200 Pa of greater than 3000 l/m 2 s and/or a basis weight between 25 g/m 2 and 75 g/m 2 . According to the invention, the air permeability of the carrier layer is greater than the air permeability of a filter medium of the particle filter. The carrier layer can be very air-permeable spun-laid media and/or spunbonds.
Ferner kann vorgesehen sein, dass die Wickellagen des Adsorbenswickels eine Stirnkante aufweisen, die abgedichtet bzw. versiegelt ist. Durch die Abdichtung bzw. Versiegelung der Strinkante(n) der Wickellagen wird verhindert, dass in den Wickellagen vorliegendes Adsorbens aus dem Adsorbenswickel an seinen axialen Endflächen heraus rieselt und es so zu einem Verlust an Adsorptionskapazität kommt. Insbesondere in motornahen bzw. lüfternahen Anwendungen, in denen immer Vibrationen auftreten, ist dies wichtig sicherzustellen.Furthermore, it can be provided that the winding layers of the adsorbent winding have an end edge that is sealed or sealed. The sealing or sealing of the end edge(s) of the winding layers prevents adsorbent present in the winding layers from trickling out of the adsorbent winding at its axial end faces, thereby resulting in a loss of adsorption capacity. This is particularly important to ensure in applications close to the motor or fan where vibrations always occur.
Dabei kann die Abdichtung bzw. Versiegelung der Stirnkanten der Wickellagen des Adsorbenswickels eine stirnseitige Endplatte ausbilden. Diese kann bereits beim Aufwickeln des Adsorbenswickels gebildet werden. So kann an den beiden seitlichen Enden eines flachen Ausgangsmaterials der Wickellagen entlang der Wickelrichtung (umfänglich) eine Versiegelung über ein Verschlusselement erfolgen. Beispielsweise kann ein Verschlusselement über einen Klebstoff, Schaum, Thermoplast, Klammer, Schweißprozess oder eine Kombination aus den zuvor genannten Möglichkeiten gebildet werden. Denkbar ist auch der Einsatz von Heißkleber direkt während des Wickelprozesses, wenn die nachfolgende Wickellage auf die vorhergehende Wickellage aufgewickelt wird und der Heißkleber im Randbereich der Wickellagen noch ausreichend flüssig ist, um sich mit dem Kleber der vorherigen Wickellage dichtend zu verbinden.The sealing or sealing of the front edges of the winding layers of the adsorbent coil can form a front end plate. This can already be formed when the adsorbent coil is wound up. Thus, a sealing can take place via a closure element at the two lateral ends of a flat starting material of the winding layers along the winding direction (circumferentially). For example, a closure element can be formed via an adhesive, foam, thermoplastic, clip, welding process or a combination of the aforementioned options. It is also conceivable to use hot glue directly during the winding process if the subsequent winding layer is wound onto the previous winding layer and the hot glue in the edge area of the winding layers is still sufficiently liquid to bond sealingly with the adhesive of the previous winding layer.
Die Versiegelung an den Stirnseiten kann auch durch eine nachträgliche thermoplastische Umformung erfolgen, indem ein Versiegelungselement auf die jeweilige Stirnseite aufgeschmolzen und verformt wird. Das Aufschmelzen kann z.B. über Ultraschall, Heizspiegel, Infrarotbestrahlung, Heißluft erfolgen und die Verformung durch Anpressen des Versiegelungselementes auf die Stirnfläche und über deren Außenkante.The sealing on the end faces can also be carried out by subsequent thermoplastic forming by melting and deforming a sealing element onto the respective end face. The melting can take place, for example, using ultrasound, heating mirrors, infrared radiation, hot air and the deformation can be done by pressing the sealing element onto the end face and over its outer edge.
Als alternative oder zusätzliche Option besteht auch die Möglichkeit der Verwendung von separaten Endscheiben.As an alternative or additional option, there is also the possibility of using separate end plates.
Gemäß einer besonders bevorzugten Ausführungsform kann das Geruchsfilterelement eine geschlossene Endscheibe und/oder eine offene Endscheibe mit einer Öffnung aufweisen. Der Adsorbenswickel des Filterkörpers ist hierbei fluiddicht mit der geschlossenen Endscheibe und/oder der offenen Endscheibe verbunden, etwa verklebt oder verschweißt. Die Öffnung in der offenen Endscheibe dient dem fluidischen Anschluss des Geruchsfilterelements und mündet in den inneren Hohlraum des Filterkörpers. "Geschlossene" Endscheibe bedeutet hierbei, dass diese Endscheibe keinen Durchbruch in Axialrichtung aufweist, sondern fluiddicht ausgebildet ist.According to a particularly preferred embodiment, the odor filter element can have a closed end disk and/or an open end disk with an opening. The adsorbent coil of the filter body is fluid-tight with the closed one End disk and / or the open end disk connected, for example glued or welded. The opening in the open end plate serves for the fluidic connection of the odor filter element and opens into the inner cavity of the filter body. “Closed” end plate means that this end plate does not have an opening in the axial direction, but is designed to be fluid-tight.
Die geschlossene Endscheibe und/oder die offene Endscheibe kann/können einen Kunststoff aufweisen oder daraus bestehen, insbesondere, Polyvinylchlorid und/oder Polypropylen und/oder Polyamid und/oder Polyurethan, insbesondere geschäumtes Polyurethan, insbesondere mit entsprechenden Flammschutzadditiven. Alternativ ist auch eine Ausbildung der Endscheibe(n) aus einem Metall, insbesondere aus (verzinktem) Stahl, möglich. Als weitere Kunststoffe eignen sich Acrylnitril-Butadien-Styrol, thermoplastische Elastomere und/oder Silikone.The closed end plate and/or the open end plate can have or consist of a plastic, in particular polyvinyl chloride and/or polypropylene and/or polyamide and/or polyurethane, in particular foamed polyurethane, in particular with corresponding flame retardant additives. Alternatively, it is also possible to design the end plate(s) from a metal, in particular from (galvanized) steel. Other suitable plastics are acrylonitrile-butadiene-styrene, thermoplastic elastomers and/or silicones.
Gemäß einer Weiterbildung der Erfindung kann das Geruchsfilterelement stützelementlos ausgebildet sein. Eine Steifigkeit des Geruchsfilterelements, insbesondere eine Biegesteifigkeit um eine Radialachse und/oder eine Torsionssteifigkeit um eine Längsachse und/oder eine Drucksteifigkeit um eine Längsachse, wird hierbei ausschließlich durch den Filterkörper mit dem Adsorbenswickel bereit gestellt. "Stützelementlos" heißt insbesondere, dass das Geruchsfilterelement keinerlei Mittelrohr, Stützrohr und/oder Stützhülsen aufweist, die entweder im inneren Hohlraum des Filterkörpers oder diesen radial außen umgebend angeordnet sind. Eine solche stützelementlose Ausführung bietet den Vorteil, besonders einfach und aufgrund der geringen Teileanzahl auch besonders kostengünstig zu sein. Ferner lassen sich solch stützelementlose Geruchsfilter nach dem Ende Ihrer Lebensdauer gut thermisch verwerten und/oder rezyklieren.According to a further development of the invention, the odor filter element can be designed without a support element. A rigidity of the odor filter element, in particular a bending rigidity about a radial axis and/or a torsional rigidity about a longitudinal axis and/or a compressive rigidity about a longitudinal axis, is provided here exclusively by the filter body with the adsorbent coil. “No support element” means in particular that the odor filter element has no center tube, support tube and/or support sleeves, which are arranged either in the inner cavity of the filter body or surrounding it radially on the outside. Such a design without support elements offers the advantage of being particularly simple and, due to the small number of parts, also particularly cost-effective. Furthermore, such odor filters without supporting elements can be easily used thermally and/or recycled after the end of their service life.
Alternativ hierzu kann das Geruchsfilterelement einen fluiddurchlässigen Außenstützmantel umfassen, der den Filterkörper radial außenliegend umgibt, und/oder eine fluiddurchlässige Innenstützhülse umfassen, die in dem inneren Hohlraum vorliegt. Der Au-βenstützmantel und/oder die Innenstützhülse können über Ihre Fläche verteilt eine Vielzahl Öffnungen aufweisen, um die Fluiddurchlässigkeit zu ermöglichen. Sie können insbesondere aus einem Blech, insbesondere einem Lochblech, gebildet sein. Die Ausführung des Geruchsfilterelements mit Außenstützmantel und/oder die Innenstützhülse hat den Vorteil, dass das Geruchsfilterelement mechanisch sehr belastbar ist sowohl hinsichtlich Belastungen auf Druck als auch auf Torsion oder Biegung, da die mechanischen Lasten nicht durch den Filterkörper geleitet werden müssen, sondern von dem Außenstützmantel und/oder der Innenstützhülse aufgenommen werden. Insbesondere der Au-βenstützmantel erlaubt ferner einen Stoßschutz, welches den Filterkörper des Geruchsfilterelements vor Beschädigungen durch unsachgemäße Handhabung schützt.Alternatively, the odor filter element may comprise a fluid-permeable outer support jacket which surrounds the filter body radially on the outside, and/or may comprise a fluid-permeable inner support sleeve which is present in the inner cavity. The outer support jacket and/or the inner support sleeve can have a large number of openings distributed over their surface in order to enable fluid permeability. They can in particular be formed from a sheet metal, in particular a perforated sheet metal. The design of the odor filter element has an outer support jacket and/or the inner support sleeve the advantage that the odor filter element is mechanically very resilient, both in terms of pressure and torsion or bending, since the mechanical loads do not have to be passed through the filter body, but are absorbed by the outer support jacket and / or the inner support sleeve. In particular, the outer support jacket also allows shock protection, which protects the filter body of the odor filter element from damage caused by improper handling.
Ferner kann vorgesehen sein, dass das Geruchsfilterelement einen in Benutzungsanordnung strömungsmäßig vorgeschalteten Fettfilter aufweist, der einen fluiddurchlässigen Außenmantel umfasst, der den Filterkörper radial außenliegend umgibt, und/oder eine fluiddurchlässige Innenhülse umfasst, die in dem inneren Hohlraum vorliegt. Der Fettfilter kann lösbar von dem Filterkörper ausgebildet sein, um diesen regelmäßig reinigen zu können. Der Fettfilter kann insbesondere ein Metallgestrick, ein Metallvlies und/oder ein Metallstreckgitter umfassen.Furthermore, it can be provided that the odor filter element has a grease filter arranged upstream in terms of use, which comprises a fluid-permeable outer jacket which surrounds the filter body radially on the outside, and/or comprises a fluid-permeable inner sleeve which is present in the inner cavity. The grease filter can be designed to be detachable from the filter body in order to be able to clean it regularly. The grease filter can in particular comprise a metal mesh, a metal fleece and/or an expanded metal mesh.
Darüber hinaus kann vorgesehen sein, dass das Geruchsfilterelement zumindest eine umlaufende Dichtung hat, insbesondere eine Axial- und/oder Radialdichtung, die insbesondere an der offenen Endscheibe vorliegt und vollumfänglich um die Öffnung der offenen Endscheibe verläuft. Die Dichtung kann hierbei auch einteilig mit der Endscheibe ausgeführt sein, was insbesondere in Ausführungen, die eine Endscheibe aus (geschäumtem) PUR- Material aufweisen, vorteilhaft ist.In addition, it can be provided that the odor filter element has at least one circumferential seal, in particular an axial and/or radial seal, which is present in particular on the open end disk and extends completely around the opening of the open end disk. The seal can also be made in one piece with the end disk, which is particularly advantageous in versions that have an end disk made of (foamed) PUR material.
Bei allen hierin beschriebenen Ausführungsformen kann das Geruchsfilterelement an einer Druckseite oder an einer Saugseite der Gebläse-Motor-Einheit vorliegen. Bei Downdraftsystemen kann das Geruchsfilterelement an einer über eine Kanalführung mit dem System verbundenen, separaten Gehäuseeinheit angeschlossen sein.In all embodiments described herein, the odor filter element can be present on a pressure side or on a suction side of the blower-motor unit. In downdraft systems, the odor filter element can be connected to a separate housing unit connected to the system via a duct.
Optional kann vorgesehen sein, dass die Wrasenabzugsvorrichtung zusätzlich einen Fettfilter aufweisen, der insbesondere die Lufteinsaugöffnung des Gehäuses überspannt. Der Fettfilter kann in Form eines Abscheideblechs mit Drahtgestrick vorliegen und dient vor allem der Vorabscheidung von groben Verunreinigungen. Es handelt sich hierbei bevorzugt um einen waschbaren Filter. Der Fettfilter weist keine geruchsadsorbierende Wirkung auf.Optionally, it can be provided that the vapor extraction device additionally has a grease filter, which in particular spans the air intake opening of the housing. The grease filter can be in the form of a separator plate with a wire mesh and is primarily used to pre-separate coarse impurities. This is preferably a washable filter. The grease filter has no odor-absorbing effect.
In einer strukturell bevorzugten Weiterbildung der erfindungsgemäßen Wrasenabzugsvorrichtung kann das Gehäuse ein Ausblasgehäuseteil, beispielsweise in Form eines Kamins, aufweisen. Das Geruchsfilterelement kann hierbei in einem durch das Ausblasgehäuseteil bereit gestellten Hohlraum vorliegen. Dieser Hohlraum des Ausblasgehäuseteils ist bei bekannten Wrasenabzugsvorrichtungen in Überbau-Bauform häufig leer und dient ausschließlich als Luftleitkanal. Dieser Bauraum kann nun erfindungsgemäß genutzt werden.In a structurally preferred development of the vapor extraction device according to the invention, the housing can have a blow-out housing part, for example in the form of a chimney. The odor filter element can be present in a cavity provided by the blow-out housing part. This cavity of the blow-out housing part is often empty in known vapor extraction devices in superstructure design and serves exclusively as an air duct. This installation space can now be used according to the invention.
Gemäß einer bevorzugten Weiterbildung ist die Wrasenabzugsvorrichtung als Wrasenabzugshaube ausgebildet, wobei die Lufteinsaugöffnung bei bestimmungsgemäßer Montage in Schwererichtung unten vorliegt.According to a preferred development, the vapor extraction device is designed as a vapor extraction hood, with the air intake opening being present at the bottom in the direction of gravity when installed as intended.
Ein anderer Aspekt der Erfindung betrifft die Verwendung eines Geruchsfilterelements in einer Wrasenabzugsvorrichtung. Das Geruchsfilterelement weist hohlzylindrischen Filterkörper mit einem inneren Hohlraum auf, wobei der Filterkörper wenigstens einen Adsorbenswickel umfassend eine Mehrzahl spiralförmig angeordneter Wickellagen mit wenigstens einem Adsorbens aufweist. Das Geruchsfilterelement wird bei der erfindungsgemäßen Verwendung bezogen auf seine Längsachse in Radialrichtung durchströmt.Another aspect of the invention relates to the use of an odor filter element in a vapor extraction device. The odor filter element has a hollow cylindrical filter body with an inner cavity, the filter body having at least one adsorbent coil comprising a plurality of spirally arranged coil layers with at least one adsorbent. When used according to the invention, the odor filter element is flowed through in the radial direction relative to its longitudinal axis.
Die in Bezug zu der erfindungsgemäßen Wrasenabzugsvorrichtung offenbarten Merkmale und Merkmalskombinationen sowie deren technischen Vorteile lassen sich auch auf die erfindungsgemäße Verwendung übertragen und umgekehrt.The features and combinations of features disclosed in relation to the vapor extraction device according to the invention and their technical advantages can also be transferred to the use according to the invention and vice versa.
Vorteile der Erfindung ergeben sich aus der Beschreibung und den Zeichnungen. Ebenso können die vorstehend genannten und die noch weiter ausgeführten Merkmale erfindungsgemäß jeweils einzeln für sich oder zu mehreren in beliebigen Kombinationen Verwendung finden. Die gezeigten und beschriebenen Ausführungsformen sind nicht als abschließende Aufzählung zu verstehen, sondern haben vielmehr beispielhaften Charakter für die Schilderung der Erfindung.Advantages of the invention emerge from the description and the drawings. Likewise, according to the invention, the features mentioned above and those further detailed can be used individually or in groups in any combination. The embodiments shown and described are not to be understood as an exhaustive list, but rather have an exemplary character for describing the invention.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In den Zeichnungen sind Ausführungsbeispiele der Erfindung dargestellt.Further advantages result from the following drawing description. Exemplary embodiments of the invention are shown in the drawings.
Es zeigen:
- Fig. 1
- eine isometrische Ansicht einer erfindungsgemäßen Wrasenabzugsvorrichtung (verdeckte Kanten);
- Fig. 2
- eine isometrische Ansicht einer erfindungsgemäßen Wrasenabzugsvorrichtung (sichtbare Kanten);
- Fig. 3
- eine Längsschnittansicht einer erfindungsgemäßen Wrasenabzugsvorrichtung;
- Fig. 4
- eine isometrische Teilschnittansicht eines Filterelements für eine erfindungsgemäße Wrasenabzugsvorrichtung gemäß einer ersten Ausführungsform;
- Fig. 5
- eine Querschnittsansicht eines Filterelements für eine erfindungsgemäße Wrasenabzugsvorrichtung gemäß der ersten Ausführungsform;
- Fig. 6
- eine isometrische Teilschnittansicht eines Filterelements für eine erfindungsgemäße Wrasenabzugsvorrichtung gemäß einer zweiten Ausführungsform;
- Fig. 7
- eine Querschnittsansicht eines Filterelements für eine erfindungsgemäße Wrasenabzugsvorrichtung gemäß der zweiten Ausführungsform;
- Fig. 8
- eine isometrische Teilschnittansicht eines Filterelements für eine erfindungsgemäße Wrasenabzugsvorrichtung gemäß einer dritten Ausführungsform.
- Fig. 1
- an isometric view of a vapor extraction device according to the invention (hidden edges);
- Fig. 2
- an isometric view of a vapor extraction device according to the invention (visible edges);
- Fig. 3
- a longitudinal sectional view of a vapor extraction device according to the invention;
- Fig. 4
- an isometric partial sectional view of a filter element for a vapor extraction device according to the invention according to a first embodiment;
- Fig. 5
- a cross-sectional view of a filter element for a vapor extraction device according to the invention according to the first embodiment;
- Fig. 6
- an isometric partial sectional view of a filter element for a vapor extraction device according to the invention according to a second embodiment;
- Fig. 7
- a cross-sectional view of a filter element for a vapor extraction device according to the invention according to the second embodiment;
- Fig. 8
- an isometric partial sectional view of a filter element for a vapor extraction device according to the invention according to a third embodiment.
In den Figuren sind gleiche oder gleichartige Komponenten mit gleichen Bezugszeichen beziffert. Die Figuren zeigen lediglich Beispiele und sind nicht beschränkend zu verstehen. Merkmale oder Merkmalskombinationen, welche in Zusammenhang mit einer bestimmten Ausführungsform offenbart sind, sind - wenn nicht explizit ausgeschlossen - auch auf die anderen Ausführungsformen übertragbar.In the figures, identical or similar components are numbered with the same reference numerals. The figures only show examples and are not to be understood as limiting. Features or combinations of features that are disclosed in connection with a specific embodiment are - unless explicitly excluded - also transferable to the other embodiments.
In den
Im Gehäuseinneren ist eine Gebläse-Motor-Einheit 3 angeordnet, die dazu ausgebildet ist, einen Luftstrom von der Lufteinsaugöffnung 14 zur Luftausblasöffnung 15 zu erzeugen und dabei einen Druckverlust des Geruchsfilters 2 zu überwinden, welcher im Strömungspfad zwischen Lufteinsaugöffnung 14 und Luftausblasöffnung 15 angeordnet ist. In der gezeigten Ausführungsformen ist der Geruchsfilter 2 auf einer Druckseite der Gebläse-Motor-Einheit 3 angeordnet. In anderen nicht figurativ gezeigten Ausführungen kann die Durchströmung des Geruchsfilters 2 auch in umgekehrter Richtung erfolgen.A fan-
Der Geruchsfilter 2 ist bezogen auf seine Längsachse in Radialrichtung durchströmbar und weist einen hohlzylindrischen Filterkörper 2` (siehe
Der Geruchsfilter 2 ist hierbei besonders platzsparend in einem Hohlraum 111 innerhalb des Ausblasgehäuseteils bzw. Kamins 11 angeordnet.The
In der
Das Geruchsfilterelement 2 weist einen Filterkörper 2' auf, der wenigstens einen Adsorbenswickel 22 umfasst. Der Adsorbenswickel 22 weist eine Mehrzahl spiralförmig angeordnete Wickellagen mit wenigstens einem Adsorbens auf. Bei dem Adsorbens kann es sich bevorzugt um eine oder verschiedene Aktivkohlen handeln. Um den Adsorbenswickel 22 zu bilden wird das wenigstens eine Adsorbens auf einer Trägerlage angeordnet und immobilisiert (z. B. durch Schmelzkleberfäden) und die Trägerlage anschließend aufgewickelt, sodass die Mehrzahl Wickellagen in der Folge spiralförmig angeordnet ist.The
Das Geruchsfilterelement 2 weist eine offene Endscheibe, an welcher die Dichtung 23 vorliegt, und eine geschlossene Endscheibe 21 auf. Die Endscheiben 23,24 können einen Kunststoff aufweisen oder daraus bestehen. Alternativ können eine oder beider der Endscheiben 23,24 auch aus einem Metall bestehen, insbesondere aus Stahl. Die Endscheiben 23,24 können mit dem Filterkörper 2' verklebt und/oder verschweißt sein.The
Gemäß der gezeigten Ausführungsform ist die Dichtung 23 einteilig mit der offenen Endscheibe 24 ausgebildet. Dies ist insbesondere vorteilhaft möglich, wenn die offene Endscheibe aus einem geschäumten Polyurethan besteht.According to the embodiment shown, the
Die gegenüber den aus dem Stand der Technik bekannten Geruchsfiltern (plissierte Bälge und Schüttungen) mit der erfindungsgemäßen Verwendung eines gewickelten Geruchsfilters verbundenen technischen Vorteile sind im allgemeinen Teil der Beschreibung umfassend gewürdigt.The technical advantages associated with the use of a wound odor filter according to the invention compared to the odor filters known from the prior art (pleated bellows and beds) are comprehensively appreciated in the general part of the description.
In den
Die Endscheiben 23,24 dienen auch zu einer Versiegelung der Stirnkanten der Wickellagen des Adsorbenswickels 22, sodass darin vorgesehenes Adsorbens (meistens Aktivkohle) nicht heraus rieseln kann.The
Der in den
In der
- 1010
- WrasenabzugsvorrichtungVapor extraction device
- 11
- GehäuseHousing
- 1212
- EinsauggehäuseteilSuction housing part
- 1111
- Ausblasgehäuseteil/KaminExhaust housing part/chimney
- 111111
- Hohlraum des Ausblasgehäuseteils/KaminsExhaust housing part/chimney cavity
- 1313
- ÜbergangsgehäuseteilTransition housing part
- 1414
- LufteinsaugöffnungAir intake opening
- 141141
- FettfilterGrease filter
- 1515
- LuftausblasöffnungAir outlet opening
- 22
- GeruchsfilterelementOdor filter element
- 2'2'
- FilterkörperFilter body
- 2121
- Geschlossene EndscheibeClosed end plate
- 2222
- AdsorbenswickelAdsorbent wrap
- 2323
- Dichtungpoetry
- 2424
- Offene EndscheibeOpen end disc
- 241241
- Öffnung der offenen EndscheibeOpening of the open end plate
- 2525
- PartikelfilterParticulate filter
- 2626
- AußenstützmantelExternal support jacket
- 2727
- InnenstützhülseInternal support sleeve
- 33
- Gebläse-Motor-EinheitBlower motor unit
- 3131
- Motorengine
- 3232
- Gebläsefan
- 3333
- Auslassstutzenoutlet connection
- 3434
- EinlassstutzenInlet connection
Claims (17)
- Vapor extraction device (10) comprising a housing (1) having an air intake opening (14) and an air exhaust opening (15), and a blower-motor unit (3) disposed in the housing (1), wherein between the air intake opening (14) and the air exhaust opening (15) an odor filter element (2) is fluidically present, which, with respect to its longitudinal axis, can be flowed through in radial direction, wherein the odor filter element (2) features a hollow-cylindrical filter body (2') having an inner hollow space, wherein the filter body (2') features at least one adsorbent winding (22) comprising a plurality of spirally disposed winding layers having at least one adsorbent, wherein the winding layers of the adsorbent winding (22) comprise an air-permeable carrier layer on which the at least one adsorbent is disposed in particulate and/or granular form and immobilized with respect to the carrier layer.
- Vapor extraction device (10) according to claim 1, characterized in that the filter body (2') features at least one particulate filter (25) fluidically coupled to the at least one adsorbent winding (14).
- Vapor extraction device (10) according to claim 2, characterized in that the at least one particulate filter (25) is disposed on an inner and/or outer circumferential surface of the adsorbent winding (14).
- Vapor extraction device (10) according to claim 2 or 3, characterized in that the at least one particulate filter (25) features a filter medium that is preferably folded, particularly preferably star-pleated.
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the at least one adsorbent comprises at least a material from the group activated carbon, zeolites, silica gels, metallic oxides, molecular sieves, phyllosilicates.
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the at least one adsorbent winding (22) features at least one further active material in addition to the adsorbent, preferably an ion exchange material, in particular a cation exchange material.
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the adsorbent winding (22) features at least 4 winding layers, particularly preferably at least 6 winding layers.
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the air-permeable support layer comprises at least one non-woven material layer and/or wherein the winding layers of the adsorbent winding (22) comprise a particulate filter layer which preferably covers the adsorbent on a side facing away from the support layer.
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the winding layers of the adsorbent winding (22) each feature a sealed front edge.
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the odor filter element (2) features a closed end disc (21) and/or an open end disc (24) having an opening (24), wherein the adsorbent winding (22) of the filter body (2) is connected in a fluid-tight manner to the closed end disc (21) and/or the open end disc (24).
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the odor filter element (2) is designed without supporting elements, wherein a rigidity, in particular a flexural rigidity around a radial axis and/or a torsional rigidity around a longitudinal axis and/or a compressive rigidity around a longitudinal axis, is provided exclusively by the filter body (2') with the adsorbent winding (22).
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the odor filter element (2) comprises a fluid-permeable outer support casing (26) radially externally surrounding the filter body (2') and/or comprises a fluid-permeable inner support sleeve (27) present in the inner hollow space.
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the odor filter element (2) features at least one circumferential seal, in particular an axial and/or radial seal, which is present in particular at the open end disc (24) and extends completely around the opening (241) of the open end disc (24).
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the vapor extraction device (10) features a grease filter which in particular covers the air intake opening (14) of the housing (1).
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the housing (1) features a blow-out housing part (11), in particular a chimney (11), wherein preferably the odor filter element (2) is present in a hollow space (111) provided by the blow-out housing part (11).
- Vapor extraction device (10) according to one of the preceding claims, characterized in that the vapor extraction device (10) is designed as a vapor extraction hood, wherein the air intake opening (14) is present downward in the direction of gravity during proper assembly.
- Use of an odor filter element (2) featuring a hollow-cylindrical filter body (2') having an inner hollow space, wherein the filter body (2') features at least one adsorbent winding (22) comprising a plurality of spirally disposed winding layers having at least one adsorbent, wherein the winding layers of the adsorbent winding (22) comprise an air-permeable carrier layer on which the at least one adsorbent is disposed in particulate and/or granular form and immobilized with respect to the carrier layer, in a vapor extraction device (10) according to one of the claims 1 to 16, wherein the odor filter element (2) is flowed through in a radial direction with respect to its longitudinal axis.
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DE102020114706.6A DE102020114706A1 (en) | 2020-06-03 | 2020-06-03 | Fume extraction device with odor filter element comprising a filter body with at least one adsorbent roll and use of an odor filter |
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GB1501381A (en) | 1974-01-14 | 1978-02-15 | Ici Ltd | Fluid treatment structure |
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FR2828414B1 (en) * | 2001-08-08 | 2003-11-14 | Patent Invest Group Holding Sa | GAS FLOW DEGREASER DEVICE |
DE102004042158B3 (en) | 2004-08-31 | 2006-03-02 | Maier, Max | Air detection device and in particular provided for exhaust box |
DE202009016200U1 (en) | 2009-11-30 | 2010-03-04 | BSH Bosch und Siemens Hausgeräte GmbH | Filter element for extractor hood and extractor hood |
DE102010014059A1 (en) | 2010-04-07 | 2011-10-13 | Mahle International Gmbh | Discharge device and odor filter |
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