EP2861910A1 - Système de filtration pour hotte aspirante - Google Patents
Système de filtration pour hotte aspiranteInfo
- Publication number
- EP2861910A1 EP2861910A1 EP13728162.2A EP13728162A EP2861910A1 EP 2861910 A1 EP2861910 A1 EP 2861910A1 EP 13728162 A EP13728162 A EP 13728162A EP 2861910 A1 EP2861910 A1 EP 2861910A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- stage
- filter element
- baffle plate
- filter stage
- 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.)
- Withdrawn
Links
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
Definitions
- the invention relates to a filter element for a household extractor hood with a filter frame, a first filter stage and a second filter stage.
- filter assemblies When aspirating and cleaning of fumes, which are produced during cooking, filter assemblies are generally used in household extractor hoods, in which multiple layers of an expanded metal are used as filter material. Through the openings in the individual expanded metal layers and the resulting change in direction of the fumes and vapors, particles, in particular fat and liquid particles from the vapors and fumes are filtered out and are deposited on the expanded metal layers. Such filter materials are usually sufficient to accommodate the accumulating in households filter quantities.
- Storage capacity of the individual expanded metal layers is especially when switching off the hood the risk that the detected fat in the filter and
- Liquid particles accumulate in the lower part of the filter. It can be so
- Eddy current filters are used. These filters usually comprise a first and a second series of half-shells which are spaced apart, directed against each other and laterally offset from one another.
- the half-shell rows have openings through which an exhaust steam loaded with grease and liquid particles
- Eddy current filter can achieve an optimal grease removal rate.
- high-performance blowers are installed with a correspondingly high blower capacity, with which usually a high
- the invention has for its object to provide a filter element for a cooker hood, with an optimized deposition rate of fat and liquid particles in the household area even at a high pollution load of fumes by fats and liquid particles, as is customary in Asian cuisine, can be achieved .
- This object is achieved in a filter element of the type mentioned above in that the first filter stage is formed in the form of an eddy current filter, the second filter stage in the form of an expanded metal filter and disposed between the first filter stage and a clean air side top of the filter frame and the two filter stages together the filter frame are added.
- the particles and / or liquid drops which are deposited in the filter element are also referred to below as impurities. The one with these
- Impurities laden airflow is also referred to as vapor or vapor.
- a filter element according to the invention is preferably understood a filter cartridge.
- the filter element preferably represents a grease filter of a household extractor hood.
- the clean air side designates the side of the filter element in the region of the filter stages, via which the purified air exits the filter element during operation of the household extractor hood and thus lies opposite the upstream side.
- the clean air side of the filter element is hereinafter also referred to as the top of the filter element designated.
- the side of the component is referred to, which faces the clean air side of the filter element, that is directed upwards.
- the suction side of the filter element is referred to as the bottom of the filter element and the sides of the components which are directed towards the suction side or lie in this as
- the household extractor hood is also referred to below as an extractor hood.
- a filter stage of the filter element which is also referred to below as a stage, the components of the filter element are referred to, which act together for a type of filtering.
- Filtration also referred to as filtering, refers to the purification of the laden air from at least part of the impurities contained therein.
- the filter frame is in
- filter stage in which at least a part of the edge of the filter stage forming these components is accommodated in the filter frame.
- an arrangement of the second filter stage is referred to, in which the components of the second filter stage preferably not over the top of
- the combination of the two filter stages according to the invention are two
- Filter element can thus be filtered over a wide range of flow rates even with a high pollution load laden air flow without significant loss of filtration efficiency.
- the filter element of the invention may be housed in a fume hood instead of a conventional expanded metal filter cassette
- the first filter stage of an upstream outer panel the first filter stage of an upstream outer panel
- inlet nozzles each having a raised edge, and a plate parallel to the outer plate arranged baffle plate having offset to the inlet nozzles slots formed.
- a first type of filtration is thus carried out in the first filter stage and a second type of filtration in the second filter stage.
- the upstream side outer plate is also referred to simply as the outer plate below.
- upstream outer plate directed downward, facing the rising vapors, and the raised edge of the inlet nozzles facing the underside of the outer plate vertically upwards.
- the passing through the inlet air flow is directed by the raised edge in the direction of the baffle plate, ie
- the impurities of the air stream are partially deposited in a first filtration.
- a large part of the impurities can be deposited already in the first filter stage. Since the baffle plate is just formed, the space requirement of the first filter stage is low. Thus, the height of the entire filter element and thus the space required for installation of the filter element in the hood can be minimized and yet the principle of the eddy current filter and the principle of an expanded metal filter can be combined.
- the baffle plate can also be formed as a perforated plate.
- the slots in the baffle plate and the inlet nozzles of the outer plate, in particular the openings of the inlet nozzles, are designed, that is, in particular have a size such that thereby fluids, in particular in the form of impurities, can pass in the air.
- Inlet nozzles are therefore also referred to as fluid.
- the inlet nozzles are Preferably designed as elongated nozzles, that is, extend in the
- the slots and the inlet nozzles have the same length.
- staggered slots and inlet nozzles is preferably referred to an arrangement in which the air emerging from the inlet nozzles in the main flow direction of the air impinges on areas of the baffle plate in which no slots are provided.
- the slots and inlet nozzles are preferably aligned parallel to each other.
- the first filter stage of the filter element is preferably at least partially over a lower edge of the filter frame in the direction of flow, ie in the direction of the vapor source over. Since the installation space for a filter element in extractor hoods is generally limited upwards, no collision problem arises in this embodiment between the first filter stage and the installation space provided for a conventional expanded metal filter.
- the filter element is therefore compactly constructed and can be integrated into a conventional frame in a suction opening of a fume hood, whereby attachment to conventional fastening systems is possible.
- the outer plate is preferably formed as a deep-drawn part.
- An outer panel produced in this way has the advantage that the production is simple and yet the required geometry, in particular the inlet nozzles can be reliably produced.
- As the material for the outer plate is preferably anodized aluminum or thin stainless steel is used, whereby the weight of the outer plate is kept low and the filter element is lightweight as a whole.
- the outer plate and the baffle plate are joined together to form a composite part.
- the joining is preferably carried out via Druckhegetechnik. This offers the advantage that only small areas are required for setting the joining points. As a result, joining points are provided centrally on the outer and impact plate, resulting in a high rigidity of the first filter stage. The impact and the outer plate can thus be provided with a low material thickness, without affecting the stability of the composite part is adversely affected. This results in a Low-weight design of the first filter stage.
- the formation of the filter is simplified by the formation of the first filter stage as a composite part, since the first filter stage is present as a single component in the manufacture of the filter element and in particular alignment of the slots and inlet nozzles in the final assembly of the filter element is no longer required.
- a fluid-holding collecting volume is preferably formed for fluid dripping out of the vapor from the first and the second filter stage.
- the second filter stage preferably comprises an outer layer arranged on the clean air side and a corrugated inner layer adjoining the baffle plate, wherein the corrugations of the inner layer are arranged perpendicular to the alignment of the slots in the baffle plate and to align the inlet nozzles.
- the outer layer and the inner layer each comprise at least one layer of expanded metal. Due to the waveform of the inner layer, the filter surface is advantageously increased, whereby the filter performance and the retention capacity of the inner layer rise.
- the baffle plate may be formed with embossments for maintaining a distance between the slots and the second filter stage. This increases the retention capacity of the expanded metal, since it avoids that held in the expanded metal liquid
- Impurities can drain without droplet formation from the second to the first filter stage.
- stampings in the baffle plate can increase the stability of the baffle plate and thus the first filter stage and the requirements for the material thickness are therefore further reduced.
- the filter frame forms part of the outer panel.
- the edge of the outer panel may be bent upwardly at the edges and the ends of the upturned edges may then be bent inwardly again. This allows the outermost edge of Outer plate rest on the top of the second filter stage and so press on the top of the first filter stage or at least hold in position.
- the filter frame is formed by deep drawing or bending on the outer plate. Other manufacturing methods, such as edges, can be used to form the filter frame.
- Figure 1 a schematic sectional view of an embodiment of a
- FIG. 2 is a schematic exploded view of the embodiment of FIG.
- Figures 3a and 3b a schematic sectional view of the first filter stage, as it is joined together by means of a joining tool to form a composite part and a schematic plan view of the provided with joining points
- FIGS. 1 and 2 show an embodiment of a filter element 10 according to the invention.
- the filter element 10 has a filter frame 12, a first filter stage 18 and a second filter stage 32 arranged between the first filter stage 18 and a clean air-side upper side 14 of the filter frame 12.
- the first filter stage 18 has an upstream outer plate 20 with partially inlet nozzles 22, each with a raised edge 24. Between the raised edges 24, a collecting volume 26 for dripping impurities P is formed.
- the inflow nozzles 22 each have a longitudinal extension and are provided parallel to one another in the outer panel 20.
- the outer plate 20 may be formed in the illustrated embodiment as a deep-drawn part of aluminum or stainless steel with a low material thickness, about 0.5 mm.
- the first filter stage 18, in particular the outer panel 20, at least partially over a lower edge 16 of the Filter frame 12 in the direction of flow over. When mounted horizontally of the filter element, the inflow side is in the direction of the vapor source, ie directed downwards.
- baffle plate 28 Parallel to the outer plate 20, that is to the areas of the outer plate 20, which lie between the inlet nozzles 22, a baffle plate 28 is arranged, which to the
- Inflow nozzles 22 offset slots 30 has.
- the baffle plate 28 is configured flat in the illustrated embodiment.
- FIG. 1 shows an air flow W, which is also referred to as vapor, which entrains impurities P in the form of fat and liquid particles, which are filtered out by the filter element 10 according to the invention.
- the air stream W loaded with the impurities P flows through the inlet nozzles 22 into the first filter stage 18 of the filter element 10.
- the inlet nozzles 22 direct the air flow W directly onto the baffle plate 28.
- the impingement of the baffle plate 28 causes first impurities to settle on the baffle plate 28 then go into that
- Drainage volume 26 can drain.
- the impingement of the air flow W deflects it in its direction, so that eddy currents occur in the first filter stage 10.
- the heavy fat and liquid particles migrate centrifugally outward and can be at the baffle plate 28 or on the
- the air flow W finally flows through the laterally offset to the inlet nozzles 22 slots 30 of the baffle plate 28 in the second filter stage 32nd
- the second filter stage 32 has a clean air side, that is, the inflow side
- corrugated inner layer 36 opposite, arranged outer layer 34 and an adjacent to the baffle plate, corrugated inner layer 36 (see Figure 2).
- the corrugations of the inner layer 36 extend perpendicular to the longitudinal extension of the slots 30.
- the outer and the inner layer are formed from at least one layer of expanded metal. Through the openings in the individual expanded metal layers and thereby
- the impurities P in particular fat and liquid particles are filtered out of the air flow W and accumulate on the expanded metal layers.
- any dripping impurities can also be included in the collection volume 26.
- FIG. 3 a shows, like the outer plate 20 and the baffle plate 28, at its edge regions by means of a tool N in the pressure-joining technique to form a composite part
- the outer plate 20 and the baffle plate 28 may be formed with a small material thickness without having a detrimental effect on the rigidity of the filter element 10.
- the entire filter element 10 is therefore produced in lightweight construction, whereby additional fall protection during its attachment are superfluous. Due to the compact design according to the invention, the filter element can also be mounted with conventional filter frame.
- the filter element 10 is also referred to as a filter concept.
- the outer plate 20 may be referred to as a front cover layer, deep-drawn part, deep-drawing region or nozzle plate.
- the inflow side of the filter element 10 is also referred to below as the device outside.
- the raised edge 24 corresponds to the raised edge.
- the collecting volume 26 corresponds to the collecting space.
- Inlet nozzles 22 are also referred to as nozzle openings.
- the filter concept according to the invention has a number of advantages.
- a good grease removal rate can be achieved over a wide range of flow velocity.
- Oils and fats can be stored or derived well.
- the filter element has a low part weight.
- a simple replacement of conventional expanded metal filter can be made without that changes to the hood would be required.
- the filter element according to the invention is based on a conventional expanded metal filter and, at least in the edge region, that is to say in the region of the frame, has a standard frame height of 8-10 mm.
- the concept can be analogously applied to larger frame heights or to frameless perforated plate filters, that is, the filter element according to the invention can be configured with larger frame heights or as a frameless perforated plate filter, in which the first filter stage is connected upstream of the perforated plate in the flow direction.
- the front cover layer that is to say outer panel, of the filter preferably consists of a deep-drawn part (preferably of anodized aluminum, optionally of thin stainless steel) with a small wall thickness, for example 0.5 mm.
- a deep-drawn part preferably of anodized aluminum, optionally of thin stainless steel
- a small wall thickness for example 0.5 mm.
- the deep-drawn part builds up to the device outside, that is, down over the frame of the filter element over, so that no collision problem arises in the space provided for a conventional expanded metal filter installation space.
- Inlet nozzles arranged.
- the primary function of the inlet nozzles is to conduct air optimally aerated into the filter element.
- By the combination of Deep-drawn part and raised edge of the inlet nozzle also creates a dense collecting space, which makes it possible to store the oils and fats deposited in the filter.
- a baffle plate is preferably used in the filter element according to the invention.
- the baffle plate is provided with slots, which allow passage of the air.
- the slots are offset compared to the nozzle openings.
- the nozzle plate and baffle plate may be joined together (preferably via pressure-bonding technique). This can be done on the edge of the element as well as pot impressions in the central region of the filter element. This creates a stable composite part.
- the pressure-joining technique has the advantage that only small installation spaces are needed to set a joining point (for example with a diameter of 3 mm),
- the expanded metal layers are placed on the baffle plate.
- the expanded metal layers should be wavy executed.
- the direction of the shaft should be perpendicular to the alignment of the slots in the baffle plate or to align the
- Inlet nozzles can be arranged.
- the entire package, that is, the first and second filter stage is preferably edged and bolted in a conventional filter frame.
- a kind of filter housing can be bent out of the deep-drawn part.
- the contaminated air flows through the inlet nozzles into the grease filter.
- the fat particles hit the baffle plate, a part of it is deposited and drips down into the trough-like deep-drawn part.
- the combination of the two functional principles of the eddy current filter and the expanded metal filter creates a filter element which combines the advantages of both systems.
- the deposition rate of the eddy current filter can be used in the sense of prefiltering.
- Eddy current filters can be used.
- the filter element can be used in a relatively large range of the flow speed of the hood without performance losses.
- Grease removal rate can be achieved.
- Platform components such as conventional expanded metal filter cartridges, interchangeable.
- the low weight of the components also requires no additional fall protection.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Ventilation (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012210000A DE102012210000A1 (de) | 2012-06-14 | 2012-06-14 | Filteranordnung für eine Dunstabzugshaube |
PCT/EP2013/061778 WO2013186133A1 (fr) | 2012-06-14 | 2013-06-07 | Système de filtration pour hotte aspirante |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2861910A1 true EP2861910A1 (fr) | 2015-04-22 |
Family
ID=48607244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13728162.2A Withdrawn EP2861910A1 (fr) | 2012-06-14 | 2013-06-07 | Système de filtration pour hotte aspirante |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2861910A1 (fr) |
DE (1) | DE102012210000A1 (fr) |
WO (1) | WO2013186133A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR112015031270B1 (pt) | 2013-06-14 | 2021-03-23 | Jordan Salpietra | Filtro de gordura para instalação dentro de uma abertura de um equipamento de cozinha comercial de coifa de exaustão |
DE102014108252A1 (de) * | 2014-06-12 | 2015-12-17 | Miele & Cie. Kg | Filtereinrichtung |
JP2018519145A (ja) * | 2015-03-16 | 2018-07-19 | サルピエトラ, ジョーダン | 多段フードフィルタ |
DE102017201331A1 (de) | 2017-01-27 | 2018-08-02 | BSH Hausgeräte GmbH | Gebläse für Dunstabzugsvorrichtung und Dunstabzugsvorrichtung |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE6810236U (de) * | 1968-12-03 | 1969-05-08 | Delbag Luftfilter G M B H Fa | Fettdunstabscheider |
US3854912A (en) * | 1972-09-11 | 1974-12-17 | Lau Prod Ltd | Combined grease trap and air filter for range hoods |
US4319898A (en) * | 1981-03-20 | 1982-03-16 | Air Filter Corporation | Louver grease filter |
US4610705A (en) * | 1984-11-06 | 1986-09-09 | Broan Manufacturing Co. Inc. | Filter for ductless range hood |
DE29906295U1 (de) * | 1999-04-08 | 1999-08-05 | Rantschl Johann | Hochleistungsfilter für die Filterung von fetthaltigen Dünsten |
US7041159B2 (en) * | 2003-08-04 | 2006-05-09 | Phillips Plastics Corporation | Separation apparatus |
DE10126842A1 (de) * | 2001-06-01 | 2002-12-05 | Bsh Bosch Siemens Hausgeraete | Verfahren und Vorrichtung zum Filtern verunreinigter Luft |
DE10208488A1 (de) * | 2002-02-27 | 2003-09-04 | Bsh Bosch Siemens Hausgeraete | Abzugshaube und Verfahren zur Absaugung und/oder Aufreinigung kontaminierter Trägerstoffe |
DE10208475A1 (de) * | 2002-02-27 | 2003-09-04 | Bsh Bosch Siemens Hausgeraete | Abzugshaube und Verfahren zum Wechseln oder Einsetzen von Filtern |
DE102005019831A1 (de) * | 2005-04-28 | 2006-11-02 | BSH Bosch und Siemens Hausgeräte GmbH | Filteranordnung für Dunstabzugshaube |
DE102007016542A1 (de) * | 2007-04-05 | 2008-10-09 | BSH Bosch und Siemens Hausgeräte GmbH | Filterelement für Dunstabzugshaube |
DE102008042488A1 (de) * | 2008-09-30 | 2010-04-01 | BSH Bosch und Siemens Hausgeräte GmbH | Filter für eine Dunstabzugshaube |
DE102009028808A1 (de) * | 2009-08-21 | 2011-02-24 | BSH Bosch und Siemens Hausgeräte GmbH | Innenrahmen für Dunstabzugshaube und Dunstabzugshaube |
DE202009017271U1 (de) * | 2009-12-19 | 2010-03-25 | Mahle International Gmbh | Dunstabzugshaube |
-
2012
- 2012-06-14 DE DE102012210000A patent/DE102012210000A1/de not_active Withdrawn
-
2013
- 2013-06-07 WO PCT/EP2013/061778 patent/WO2013186133A1/fr active Application Filing
- 2013-06-07 EP EP13728162.2A patent/EP2861910A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2013186133A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102012210000A1 (de) | 2013-12-19 |
WO2013186133A1 (fr) | 2013-12-19 |
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