EP3919820A1 - Hotte aspirante de fumées pourvu d'élément de filtre à odeurs comprenant un corps filtrant pourvu d'au moins une enveloppement adsorbante et utilisation d'un filtre à odeurs - Google Patents

Hotte aspirante de fumées pourvu d'élément de filtre à odeurs comprenant un corps filtrant pourvu d'au moins une enveloppement adsorbante et utilisation d'un filtre à odeurs Download PDF

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Publication number
EP3919820A1
EP3919820A1 EP21173671.5A EP21173671A EP3919820A1 EP 3919820 A1 EP3919820 A1 EP 3919820A1 EP 21173671 A EP21173671 A EP 21173671A EP 3919820 A1 EP3919820 A1 EP 3919820A1
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EP
European Patent Office
Prior art keywords
adsorbent
extraction device
vapor extraction
filter
filter element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21173671.5A
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German (de)
English (en)
Other versions
EP3919820B1 (fr
Inventor
Peter Pekny
Dr. Peter FREMEREY
Tim HERRENKNECHT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
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Mann and Hummel GmbH
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Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP3919820A1 publication Critical patent/EP3919820A1/fr
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Publication of EP3919820B1 publication Critical patent/EP3919820B1/fr
Active legal-status Critical Current
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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 roll and the use of an odor filter element comprising a filter body with at least one adsorbent roll in a vapor extraction device
  • Vapor extraction devices also called extractor hoods
  • Substructure variants are also called downdraft or table ventilation systems, with the extractor being integrated into the hob.
  • These are installed in kitchens, both in the private and professional environment, in the area of a hob and are designed to extract cooking fumes, the so-called fumes, in order to keep the air in the kitchen free of odors and / or pollutants that occur during cooking and / or roasts arise.
  • There are types of construction which are designed to convey the vapor into the open air via appropriate piping and types of construction which work in a recirculating manner, i.e. H. Suck off the vapors and, after cleaning, feed it back into the kitchen air in an odor filter element.
  • Both designs usually have a grease filter, which is provided as the first filter stage on the inlet side and protects the device components of the vapor extraction device from contamination and damage.
  • a generic vapor extraction device is for example in the DE 20 2005 002 589 U1 described.
  • Adsorbent beds are often used as odor filters, which are filled into chambers of an odor filter frame through which fluid can flow.
  • 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 arise between the Form loose particles, which reduce the efficiency.
  • such bulk-based odor filters are designed as hollow cylindrical filter cartridges which have a filling volume with a circular ring-shaped 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 jacket walls are mostly designed as perforated sheets, there is also the problem that the smallest adsorbent components pass through the openings in the perforated sheet, which results in increased dust exposure when handling and / or operating the cartridges.
  • the odor filter as a pleated combination filter which has a pleated filter medium comprising at least one particle filter layer and at least one adsorbent layer which is pleated to form a bellows.
  • a pleated 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 constituents.
  • the vapor extraction device comprises a housing with an air intake opening and an air exhaust opening as well as a fan-motor unit arranged in the housing.
  • a fan-motor unit arranged in the housing.
  • the odor filter element In terms of flow between the air intake opening and the air discharge opening, there is an odor filter element through which flow can flow in the radial direction in relation 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 roll comprising a plurality of spiral wound 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 are adjacent to one another in the radial direction, the flow always takes place from layer to layer without there being bypass flow paths in which one Flow without contact with the adsorbent would be possible.
  • the odor filter element is flowed through in the radial direction, in particular from the radial inside to the radial outside.
  • the invention also encompasses a flow from radially outside to radially inside. With a flow 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.
  • the adsorbent can in principle be any adsorbent that appears suitable to a person skilled in the art in the kitchen environment and that enables corresponding odor adsorption.
  • the motor of the fan 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 person skilled in the art will select according to the requirements of the p-V system characteristic.
  • the fan-motor unit has, in particular, a fan housing which has an air inlet nozzle and an air outlet nozzle, with the air inlet nozzle being fed from the air intake opening of the housing to the air inlet nozzle during operation and purified air being fed via the air outlet nozzle to the air outlet opening of the housing so that it is then fed can either be returned to a kitchen area or released into the surrounding area.
  • the filter body can have at least one particle filter which is coupled in terms of flow to the at least one adsorbent roll. Suspended matter and other particles, which cannot be separated by the adsorbent coil, can be separated from the vapor via the particle filter.
  • the particle filter can be connected upstream and / or downstream of the adsorbent roll in terms of flow, with combinations also being explicitly possible.
  • the particle filter can in particular be arranged on an inner and / or outer jacket surface of the adsorbent roll.
  • 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 roll on its inner and / or outer circumference.
  • the particle filter can be in the form of a flat layer, which is correspondingly butted together in order to form a circular ring in cross section, so that it can be pulled over the adsorbent roll on the outside and / or can be introduced into the inner cavity.
  • the particle filter has a filter medium which can be folded, preferably star-folded.
  • the filter medium itself can be a single or multi-layer filter medium, in particular a fleece 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 a needle felt material, in particular a polypropylene or polyethylene terephthalate needle felt, and / or a meltblown layer and / or 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 sheet 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 carbon, each of which can have a different target gas spectrum.
  • impregnated activated carbons can be used, preferably acidic impregnated activated carbons.
  • the raw material for the activated carbons 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 roll can have at least one further active material, preferably an ion exchange material, in particular a cation exchanger or “acid” ion exchanger.
  • an ion exchange material in particular a cation exchanger or “acid” ion exchanger.
  • ion exchange materials have, in particular, an improved adsorption of trimethylamine.
  • the adsorbent roll comprises a plurality of winding layers, for example at least four winding layers, preferably at least six winding layers.
  • a person skilled in the art can easily determine the maximum possible number of winding layers for the individual case on the basis of the influencing variables of the fan characteristic curve, system characteristic curve and the desired maximum volume flow.
  • the wound layers of the adsorbent roll comprise an air-permeable carrier layer, in particular a nonwoven material layer, the at least one adsorbent being arranged in particle and / or granulate form on the carrier layer.
  • the carrier layer is wound up in a spiral together with the adsorbent arranged thereon to form the adsorbent roll.
  • the nonwoven material layer preferably comprises at least 90% synthetic fibers, in particular PET fibers.
  • a weight per unit area of the nonwoven material layer is 25 to 75 g / m 2 in versions.
  • the air permeability of the nonwoven material layer in embodiments can be over 3000 l / m 2 s, preferably over 4000 l / m 2 s.
  • the wound layers of the adsorbent roll can comprise a particle filter layer which preferably covers the adsorbent on a side facing away from the carrier layer.
  • a flat composite layer of carrier layer-adsorbent-particle filter layer is preferably wound up in a spiral to produce the adsorbent roll.
  • the adsorbent particles are immobilized with respect to the carrier layer; this can be done by means of hot-melt adhesive threads, which are applied as a thin network during the manufacture 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 weight per unit area 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 spunlaid media and / or spunbonded nonwovens.
  • the wound layers of the adsorbent roll have an end edge which is sealed or sealed.
  • the sealing or sealing of the knuckle 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 and thus leading to a loss of adsorption capacity. This is particularly important to ensure in applications close to the motor or close to the fan, in which vibrations always occur.
  • the sealing or sealing of the front edges of the wound layers of the adsorbent roll can form a front end plate. This can already be formed when the adsorbent roll is being wound up. Sealing via a closure element can thus take place 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 using an adhesive, foam, thermoplastic, clip, welding process or a combination of the options mentioned above. It is also conceivable to use hot-melt adhesive directly during the winding process if the subsequent winding layer is wound onto the previous winding layer and the hot-melt adhesive in the edge area of the winding layers is still sufficiently liquid to bond with the adhesive of the previous winding layer in a sealing manner.
  • the end faces can also be sealed by subsequent thermoplastic reshaping, in that a sealing element is melted and deformed on the respective end face. Melting can take place, for example, using ultrasound, heated mirrors, infrared radiation, hot air and the deformation can be achieved by pressing the sealing element onto the 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 roll of the filter body is fluid-tight with the closed one End plate and / or the open end plate connected, for example glued or welded.
  • the opening in the open end plate is used for the fluidic connection of the odor filter element and opens into the inner cavity of the filter body.
  • Closed end disk means here that this end disk does not have an opening in the axial direction, but is designed to be fluid-tight.
  • the closed end disk and / or the open end disk 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 appropriate flame retardant additives.
  • the end plate (s) can also be made from a metal, in particular from (galvanized) steel. Acrylonitrile-butadiene-styrene, thermoplastic elastomers and / or silicones are suitable as further plastics.
  • the odor filter element can be designed without a support element.
  • Rigidity of the odor filter element in particular flexural rigidity about a radial axis and / or torsional rigidity about a longitudinal axis and / or compressive rigidity about a longitudinal axis, is provided exclusively by the filter body with the adsorbent roll.
  • “No support element” means, in particular, that the odor filter element does not have any central 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 a support element offers the advantage of being particularly simple and, due to the small number of parts, also being particularly cost-effective.
  • such odor filters without supporting elements can be thermally utilized and / or recycled after the end of their service life.
  • the odor filter element can comprise a fluid-permeable outer support jacket which surrounds the filter body radially on the outside, and / or 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 multiplicity of openings distributed over their surface in order to enable fluid permeability.
  • they can 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 loads on pressure and on 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 due to improper handling.
  • the odor filter element has a grease filter connected upstream in terms of flow in the usage arrangement, 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 detachable from the filter body in order to be able to clean it regularly.
  • the grease filter can in particular comprise a metal knitted fabric, a metal fleece and / or a 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 runs completely around the opening of the open end disk.
  • the seal can also be designed in one piece with the end plate, which is particularly advantageous in designs that have an end plate made of (foamed) PUR material.
  • the odor filter element can be present on a pressure side or on a suction side of the fan-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 have a grease filter which, in particular, spans the air intake opening of the housing.
  • the grease filter can be in the form of a separating plate with a wire mesh and is used primarily for the pre-separation of 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 exhaust housing part is often empty in known vapor extraction devices in a 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, the air intake opening being at the bottom in the direction of gravity when properly installed.
  • the odor filter element has a hollow cylindrical filter body with an inner cavity, the filter body having at least one adsorbent roll comprising a plurality of spiral wound layers with at least one adsorbent.
  • the odor filter element is traversed in the radial direction in relation to its longitudinal axis.
  • a vapor extraction device 10 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 an intake housing part 12, a discharge housing part or chimney 11 and a transition housing part 13 which connects the intake housing part 12 to the discharge housing part or chimney 11 and is inclined at an obtuse angle to the latter.
  • the air intake opening 14 is spanned by a grease filter 141, which can be designed as a wire mesh and in particular is washable and therefore reusable.
  • a blower 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 in the odor filter 2, which is arranged in the flow path between the air intake opening 14 and air exhaust opening 15.
  • the odor filter 2 is arranged on a pressure side of the fan-motor unit 3. In other embodiments not shown in the figures, the flow through the odor filter 2 can also take place in the opposite direction.
  • the odor filter 2 can be traversed in the radial direction in relation to its longitudinal axis and has a hollow cylindrical filter body 2 '(see FIG Fig. 3 ) with an inner cavity, the raw side being inside the inner cavity and the clean side outside.
  • the odor filter 2 is closed axially at the end by a closed end disk 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 fan 32 has an inlet connection 34 through which polluted air can be drawn in through the air intake opening 14 of the housing 1 and an outlet connection 33 through which the polluted air can be fed to the odor filter element 2.
  • the odor filter element 2 is connected to the outlet connection 33 in a fluid-tight manner, with a seal 23 present on the odor filter element 2 serving for sealing.
  • the odor filter element 2 has a filter body 2 ′ which comprises at least one adsorbent roll 22.
  • the adsorbent roll 22 has a plurality of spirally arranged winding layers with at least one adsorbent.
  • the adsorbent can preferably be one or different activated carbons.
  • the at least one adsorbent is arranged and immobilized on a carrier layer (e.g. by means of hot-melt adhesive threads) and the carrier layer is then wound up so that the plurality of winding layers are subsequently arranged in a spiral.
  • 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 comprise or consist of a plastic. Alternatively, one or both of the end disks 23, 24 can also consist of a metal, in particular of 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 disk 24. This is particularly advantageous if the open end disk 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, the adsorbent coil 22 being present radially on the inside, adjoining the cavity.
  • the adsorbent coil 22 is surrounded radially on the outside by a particle filter 25 which comprises a star-shaped folded filter medium, which is connected to a circumferentially closed bellows. In the system configuration on the pressure side, the particle filter 25 would therefore be on the outflow side of the adsorbent roll 22.
  • Adsorbent coil 22 and particle filter 25 are connected at their axial ends with end plates, a closed end plate 21 and an open end plate 24 with an opening 241 being provided.
  • the open end disk consists of a foamed polyurethane and is designed in one piece with the seal 23, which completely surrounds the opening 241.
  • the seal 23 is trapezoidal in cross section and extends from a surface of the end disk in the axial direction away from the latter.
  • the odor filter 2 has no support element (no central pipe). Flexural rigidity about a radial axis and / or torsional rigidity about a longitudinal axis and / or compressive rigidity about 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 front edges of the winding layers of the adsorbent roll 22 so that the adsorbent (mostly 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 according to a third embodiment is shown. From the first embodiment ( Fig. 4 , 5 ) This differs in that an inner support sleeve 27 is present radially on the inside adjoining the adsorbent roll 22 and an outer support jacket 26 is present radially on the outside adjoining the particle filter 25. Both the outer support jacket 26 and the inner support sleeve 27 are designed to be fluid-permeable, namely as a perforated plate. 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)
EP21173671.5A 2020-06-03 2021-05-12 Hotte aspirante de fumées pourvu d'élément de filtre à odeurs comprenant un corps filtrant pourvu d'au moins une enveloppement adsorbante et utilisation d'un filtre à odeurs Active EP3919820B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020114706.6A DE102020114706A1 (de) 2020-06-03 2020-06-03 Wrasenabzugsvorrichtung mit Geruchsfilterelement umfassend einen Filterkörper mit wenigstens einem Adsorbenswickel und Verwendung eines Geruchsfilters

Publications (2)

Publication Number Publication Date
EP3919820A1 true EP3919820A1 (fr) 2021-12-08
EP3919820B1 EP3919820B1 (fr) 2023-10-11

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EP21173671.5A Active EP3919820B1 (fr) 2020-06-03 2021-05-12 Hotte aspirante de fumées pourvu d'élément de filtre à odeurs comprenant un corps filtrant pourvu d'au moins une enveloppement adsorbante et utilisation d'un filtre à odeurs

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EP (1) EP3919820B1 (fr)
DE (1) DE102020114706A1 (fr)
ES (1) ES2963969T3 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002081657A (ja) * 2000-08-31 2002-03-22 Mitsubishi Paper Mills Ltd 耐熱脱臭フィルター
FR2828414A1 (fr) * 2001-08-08 2003-02-14 Patent Invest Group Holding Sa Dispositif degraisseur de flux gazeux
DE202005002589U1 (de) 2004-08-31 2005-06-23 Maier, Max Lufterfassungseinrichtung und insbesondere dafür vorgesehene Abluftbox
EP2506953B1 (fr) 2009-11-30 2018-01-10 BSH Hausgeräte GmbH Hotte aspirante
CN210145789U (zh) * 2019-06-03 2020-03-17 陕西万宝隆科技实业发展有限公司 一种油烟净化系统用非甲烷总烃吸附装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1501381A (en) 1974-01-14 1978-02-15 Ici Ltd Fluid treatment structure
DE102010014059A1 (de) 2010-04-07 2011-10-13 Mahle International Gmbh Abzugseinrichtung und Geruchsfilter
DE102013008389A1 (de) * 2013-05-17 2014-11-20 Mann + Hummel Gmbh Filterelement, insbesondere Luftfilterelement, und Filtersystem mit einem Filterelement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002081657A (ja) * 2000-08-31 2002-03-22 Mitsubishi Paper Mills Ltd 耐熱脱臭フィルター
FR2828414A1 (fr) * 2001-08-08 2003-02-14 Patent Invest Group Holding Sa Dispositif degraisseur de flux gazeux
DE202005002589U1 (de) 2004-08-31 2005-06-23 Maier, Max Lufterfassungseinrichtung und insbesondere dafür vorgesehene Abluftbox
EP2506953B1 (fr) 2009-11-30 2018-01-10 BSH Hausgeräte GmbH Hotte aspirante
CN210145789U (zh) * 2019-06-03 2020-03-17 陕西万宝隆科技实业发展有限公司 一种油烟净化系统用非甲烷总烃吸附装置

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Publication number Publication date
EP3919820B1 (fr) 2023-10-11
ES2963969T3 (es) 2024-04-03
DE102020114706A1 (de) 2021-12-09

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