WO2008122485A2 - Élément filtrant pour hotte aspirante - Google Patents

Élément filtrant pour hotte aspirante Download PDF

Info

Publication number
WO2008122485A2
WO2008122485A2 PCT/EP2008/053094 EP2008053094W WO2008122485A2 WO 2008122485 A2 WO2008122485 A2 WO 2008122485A2 EP 2008053094 W EP2008053094 W EP 2008053094W WO 2008122485 A2 WO2008122485 A2 WO 2008122485A2
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter element
layers
coating
layer
Prior art date
Application number
PCT/EP2008/053094
Other languages
German (de)
English (en)
Other versions
WO2008122485A3 (fr
Inventor
Udo Reiff
Original Assignee
BSH Bosch und Siemens Hausgeräte GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to EP08717835A priority Critical patent/EP2132491A2/fr
Publication of WO2008122485A2 publication Critical patent/WO2008122485A2/fr
Publication of WO2008122485A3 publication Critical patent/WO2008122485A3/fr

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
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
    • B01D2267/40—Different types of filters

Definitions

  • the present invention relates to a filter element for an extractor hood.
  • filter elements in particular filter cassettes, are used to remove impurities, in particular fat particles, from the vapor which is sucked in by the extractor hood.
  • the filter cassettes are detachably attached to the extractor hood so that they can be separated from the extractor hood for cleaning purposes.
  • the filter elements can be designed as metal filters. Such metal filters typically include multiple layers of expanded metal. So metal filters are used, in which three to twelve layers
  • Expanded metal is stacked on top of each other.
  • the greater number of layers is necessary in order to set a sufficient storage capacity of the filter element for impurities and a defined air permeability of the filter element, when the passage openings in the individual filter layers are large.
  • Object of the present invention is therefore to provide a filter element in which the cost of materials for the production is low and yet a defined permeability of the filter element can be adjusted.
  • the filter element should be able to be produced quickly and inexpensively.
  • the invention is based on the finding that this object can be achieved by adjusting the air permeability of the individual filter layers by treating the filter layers after their production.
  • a filter element for a cooker hood which comprises at least three filter layers.
  • the filter element is characterized in that the at least three filter layers have different air permeabilities and at least one of the filter layers is provided for adjusting an air permeability with a coating.
  • the property of the filter layer in the filter element air is referred to for the purposes of this invention.
  • the air permeability is determined in particular by the size of the Lmon manlassö réelleen in the filter layers.
  • the mesh width or mesh width of the filter layers that is to say the openings in the filter layers during manufacture, can be greater than the desired passage opening in the filter layers.
  • Filter layers with a larger mesh width can be produced faster and thus more cost-effectively.
  • such filter layers usually have a lower weight due to the lower material in the position.
  • the different filter layers can be produced from the same starting material.
  • Coating be the same size.
  • the costs for the production of the filter element are further reduced since, for example, only filter layer material having a size of passage openings has to be kept ready.
  • the surface properties of the individual filter layers can additionally be influenced.
  • the surface can be protected against mechanical or chemical attack.
  • the air permeability of the filter layers decreases in the direction of the clean air side of the filter element.
  • clean air side the side of the filter element is referred to, which faces away in the installed state in the hood of the inflow side, meets at the vapors on the filter element.
  • the air permeability can be achieved by applying a coating, the decrease in the air permeability from one layer to the next can be set in a targeted and precise manner and, for example, also be continuous.
  • the filter layers are made of expanded metal. Expanded metal is as
  • the size of the mesh or openings in the at least three filter layers may be the same before the coating of the at least one filter layer.
  • the same starting material is used for all filter layers, the setting of different air permeabilities takes place in this embodiment on the application of the coating on one or more filter layers.
  • the size of the mesh to choose different filter layers differently. As a result, a different air permeability is already given by the starting material.
  • the venting permeability of the filter layers can subsequently by the application of the Coating be influenced. In this embodiment, the filter element can thus be realized a greater range of different air permeabilities of the individual filter layers.
  • the coating is preferably a paint coating, in particular a powder paint coating.
  • Powder coatings can be applied to filter layers in which openings are provided for the passage for cleaning vapors, without having to fear complete clogging or closing of the openings.
  • the powder-applied coating can be fixed, for example, by heat treatment.
  • the maintenance of the passage opening can be ensured in a powder coating and the setting of a predetermined size of the passage opening by a targeted adjustment of the coating thickness.
  • a coated by powder coating coating, such as a paint is also characterized by good adhesion to the surface of the filter layer.
  • the coating, in particular the powder coating is also alkali-resistant.
  • an alkali-resistant coating in addition to simplifying the removal of adhered impurities, protection against the attack of the surface of the filter layer by alkalis can be created.
  • the filter element is exposed especially when cleaning in a dishwasher.
  • the coating the filter material, which is for example aluminum, attacked by the alkalis in the dishwasher and thereby the visual appearance of the filter element would be deteriorated, at least after repeated cleaning.
  • the clean air side facing away from the filter layer is uncoated.
  • the filter layer also referred to as inflow layer, can be surface-treated in another way in this embodiment.
  • the surface may be oxidized. If the material is aluminum, the surface may be anodised, that is, subjected to electrolytic oxidation. This treatment of the surface of the filter layer can be protected against chemical attack, such as when cleaning in the dishwasher. The size of the openings in the filter layer is not changed by these treatment methods. Since larger passage openings are desired at the Anströmlage, this surface treatment is advantageous.
  • the filter element may comprise two cover filter layers and at least one intermediate filter layer, wherein the intermediate filter layer has a corrugated cross section and the cover filter layers represent planar filter layers.
  • the filter element in addition to the optimized flow through the filter element, which is adjusted by the size of the passage openings, through the waves in the intermediate filter layer, the size of the surface at which impurities can be deposited and thus separated from the air, increased. Without significantly increasing the weight of the filter element, a large area can be provided by the corrugated designed intermediate filter layer.
  • the passage openings of this layer are at an angle not equal to 90 ° to the usually vertically directed vapors. This reduces the effective size of the air passage opening. It is of course also within the scope of the invention to choose a different cross section for the intermediate layer. For example, it may have a zigzag shape.
  • the coating can have a layer thickness of 30 to 120 ⁇ m. This layer thickness is so considerable with a size of the mesh in the filter layer of, for example, 4, 5 or 6 mm, that the air permeability of the filter layers can be influenced by such a coating.
  • the coating consists of several layers and the total layer thickness is 150 ⁇ m or more.
  • the individual filter layers are coated in succession with the coating material in several coating steps.
  • the advantage of this embodiment is that the hardening of the individual layers can be ensured. Due to the multiple coating, the size of the passage openings in the filter layers can be considerably changed.
  • the use of a multiple coating also allows the use of starting material with the same mesh size to produce a filter element with decreasing air permeability to the clean air side.
  • the coating material may be, for example, a polyester or polyurethane-based paint, in particular an epoxy polyester clearcoat.
  • This lacquer combines the properties required for the purpose achieved according to the invention.
  • the alkali resistance of the coating is ensured and the visual appearance is not affected by the transparency of the paint.
  • the coating achieves a chemical-resistant sealing of the material of the filter layer against oxidation processes, which occur due to the attack of strong alkalis, for example in the dishwasher.
  • the paint has a low endurenpolartician and therefore has a very low tendency to fouling.
  • the mechanical and chemical strength values of this paint are sufficient to make the surface of the filter cloths resistant to alkalis in the dishwasher,
  • Figure 1 is a schematic, perspective bottom view of an embodiment of the filter element according to the invention.
  • FIG. 2 shows a schematic sectional view through an embodiment of the invention
  • FIGS. 3a and 3b detailed views of the filter layers of an embodiment of a
  • Figures 4a and 4b detailed views of the Fütterlagen another embodiment of a Filtereiementes.
  • FIG. 5 shows a schematic sectional view of a further embodiment of the invention
  • the filter element 1 is a
  • This filter cassette 1 comprises a frame 2 and filter layers 3 held therein.
  • the filter cassette 1 can be used in an extractor hood (not shown) in the region of the suction surface and act there as a grease filter.
  • Einrastelemen ⁇ e 11 are provided in the illustrated embodiment on dar front 10 of the filter cartridge 1.
  • the latching elements 11 can be actuated via a S ⁇ tuschistsmechanismus which is provided in a provided for this in the field of Füfsrlagen 3 Gehiuse 12.
  • a handle 13 is provided on the underside of the housing 12, via which the Setrelinsmechanismus can be operated.
  • the gaps 3 are In the remaining area of the frame 2, the filter layers 3 are present.
  • the arrangement of the filter layers 3 according to an embodiment is shown schematically in the sectional view in FIG.
  • the filter layers 3 extend in the area defined by the frame 2 and are placed one on top of the other.
  • the filter element 1 is flown through from below by vapor or other vapor from the flow direction designated as S in FIG.
  • the filter layers 3 through openings 41 are provided.
  • the size of the passage openings 41 decreases from the filter layer 31, on which the vapor first encounters, to the filter layer 34, which faces the clean air side of the filter element 1.
  • two further intermediate layers 32 and 33 are arranged.
  • the Anströmlage 31 and the clean air layer 34 may also be referred to as cover layers.
  • the individual filter layers 3 are made of expanded metal.
  • the filter layers 3 have webs 5 and meshes or openings 4 formed between the webs 5.
  • Figure 2 shows the filter element 1 only schematically. The dimensions and proportions do not correspond to the actual conditions. In particular, the width of the webs 5 has been shown much larger for better visibility.
  • the flow-through layer 31 in the embodiment shown is a filter layer without a coating.
  • This filter layer may instead be anodized, for example.
  • the passage opening 4 is thus formed by the distance between two adjacent webs 5 of the material of the filter layer 31, designated as mesh width 41.
  • a coating 6 is applied in each case. The thickness of the coating 6 is lower on the intermediate layer 32 abutting the Anströmlage 31 than on the adjoining further intermediate layer 33.
  • the thickness of the coating 6 on the clean air layer 34 is finally greater than the coating 6 on the underlying intermediate layer 33rd
  • the filter layers 31 to 34 are shown for better comparison that their passage openings 4 are aligned with each other. In this orientation, the filter layers 3 are not inserted into the filter element. From this representation, however, it can be clearly seen that in the embodiment of the filter layers 3 of the filter element 1 shown in FIG. 3, the webs 5 of the material of the filter layers 3 are of equal size and thus the filter layers 3 have the same mesh size 4. Because of the different thicknesses of the coatings 6 applied to the filter layers 32, 33 and 34, a size of the passage openings 41 decreasing to the clean air side R is achieved. The passage openings 41 in the filter layers 32, 33 and 34 in this case are dimensioned according to the mesh size 4 minus twice the layer thickness of the coating 6.
  • FIGS. 4a and 4b show a further embodiment of the filter element 1.
  • This embodiment differs from the embodiment shown in Figure 3, since in this case the mesh size 4 of the Anströmlage 31 is greater than the mesh size 4 of the other filter layers 32, 33 and 34.
  • the clean air layer 34 and the underlying intermediate layer 33 are provided with coatings 6 where no coatings 6 have against the Anströmlage 31 and the overlying intermediate layer 32.
  • the passage opening 41 is larger at the flow-through layer 31 than at the intermediate layer 32 lying above it .
  • the passage openings 41 are determined by the mesh size 4 and the layer thickness of the coating 6 and due to the same layer thickness of the coatings 6 on these two layers, the same.
  • FIG. 5 shows a further embodiment of the filter element 1 according to the invention.
  • the cover filter layers which represent the Anströmlage 31 and the clean air layer 34 are formed as flat plates, preferably made of expanded metal.
  • the intermediate layer 35 is also made of expanded metal, but is designed as a corrugated plate.
  • the size of the passage openings 41 in the intermediate layer 35 and the clean air layer 34 may be the same.
  • the size of the passage openings 41 in the Anströmlage 31, however, is larger.
  • the mesh size 4 of the Anströmlage 6mm and the mesh size of further filter layers 34, 35 each 4mm.
  • all the filter layers 31, 34, 35 are each coated with a coating (not shown).
  • the size of the passage openings 41 therefore decreases with respect to the mesh size 4 in each case by twice the layer thickness of the coating. Because the intermediate layer 35 is corrugated, the number of the passage openings 41 increases at this layer. Due to the orientation of the passage openings 41 to the flow direction S in which the vapor impinges on the filter element 1, which is perpendicular to this direction and thus easy from the vapors to be flowed through dimension of the passage opening 41 is reduced.
  • the invention is not limited to the illustrated embodiments.
  • the Anströmlage and the intermediate layer have the same mesh size and all the filter layers are provided with a coating of the same layer thickness.
  • the coating can completely surround the webs of the filter layer cover layer.
  • all sides of the filter layer are coated.
  • the filter layer is coated only on one side and at the edges of the mesh.
  • Such a one-side coated filter layer is preferably integrated into the filter element in such a way that the coated side faces the flow of the vapor.
  • the size of the passage openings is also reduced in this embodiment by the coating thickness.
  • the material requirement of coating material, in particular the powder coating is further reduced.
  • the present invention thus provides a possibility to provide a filter element with a high degree of separation, in particular with a high degree of grease separation.
  • the layers of the filter element can in this case be compressed in the direction of the clean air side, that is to say have lower air permeabilities. Due to the small number of filter layers required, in particular three filter layers, the weight of the filter element can be reduced and thus the assembly of the filter element to the extractor hood can be simplified.
  • As a result of the coating or painting even larger meshed expanded meshes can be used as filter layers.
  • These larger meshed expanded metal or expanded metals, for example with a Mesh widths of 6mm are faster compared to expanded metal or expanded mesh with a mesh size of 4mm, for example.
  • a longevity of the filter element is ensured when painting with an alkali-resistant paint.
  • the process of painting can also be realized at a cost equal to the cost of anodising. So that the filter element according to the invention also brings no higher production costs.

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  • 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)
  • Filtering Materials (AREA)
  • Ventilation (AREA)

Abstract

La présente invention concerne un élément filtrant destiné à une hotte aspirante et comprenant au moins trois couches de filtrage (3, 31, 32, 33, 34, 35). L'élément filtrant se caractérise en ce que les couches de filtrage (3, 31, 32, 33, 34, 35) présentent des perméabilités à l'air différentes et au moins l'une des couches de filtrage (3, 31, 32, 33, 34, 35) présente un revêtement (6) qui permet le réglage de la perméabilité à l'air. L'invention permet d'obtenir un élément filtrant qui garantit un degré de dépôt des graisses important avec un faible besoin en matériau.
PCT/EP2008/053094 2007-04-05 2008-03-14 Élément filtrant pour hotte aspirante WO2008122485A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08717835A EP2132491A2 (fr) 2007-04-05 2008-03-14 Élément filtrant pour hotte aspirante

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710016542 DE102007016542A1 (de) 2007-04-05 2007-04-05 Filterelement für Dunstabzugshaube
DE102007016542.2 2007-04-05

Publications (2)

Publication Number Publication Date
WO2008122485A2 true WO2008122485A2 (fr) 2008-10-16
WO2008122485A3 WO2008122485A3 (fr) 2009-09-17

Family

ID=39736228

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/053094 WO2008122485A2 (fr) 2007-04-05 2008-03-14 Élément filtrant pour hotte aspirante

Country Status (3)

Country Link
EP (1) EP2132491A2 (fr)
DE (1) DE102007016542A1 (fr)
WO (1) WO2008122485A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008042488A1 (de) * 2008-09-30 2010-04-01 BSH Bosch und Siemens Hausgeräte GmbH Filter für eine Dunstabzugshaube
DE102010043538A1 (de) * 2010-11-08 2012-05-10 BSH Bosch und Siemens Hausgeräte GmbH Filter mit Auswertevorrichtung
DE102012210000A1 (de) * 2012-06-14 2013-12-19 BSH Bosch und Siemens Hausgeräte GmbH Filteranordnung für eine Dunstabzugshaube
CN108426281A (zh) * 2018-04-23 2018-08-21 苏州瑞之弘空气净化有限公司 一种环境工程直流式排烟装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610705A (en) * 1984-11-06 1986-09-09 Broan Manufacturing Co. Inc. Filter for ductless range hood
US4904288A (en) * 1989-06-21 1990-02-27 Mike D. Shoffiett Filter element for circulating air systems
JPH05293318A (ja) * 1992-04-17 1993-11-09 Souriyuu Kk 厨房用フィルター材
US5525136A (en) * 1994-09-06 1996-06-11 Rosen; Richard M. Gasketed multi-media air cleaner
US20030150199A1 (en) * 2002-02-07 2003-08-14 Honda Giken Kogyo Kabushiki Kaisha Filter element
EP1433515A2 (fr) * 2002-12-23 2004-06-30 Samsung Electronics Co., Ltd. Purificateur d'air
DE102005019831A1 (de) * 2005-04-28 2006-11-02 BSH Bosch und Siemens Hausgeräte GmbH Filteranordnung für Dunstabzugshaube
DE102006005807A1 (de) * 2006-02-08 2007-08-16 BSH Bosch und Siemens Hausgeräte GmbH Filterelement für Dunstabzugshaube

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1020643B (de) * 1951-12-29 1957-12-12 Bataafsche Petroleum Vorrichtung zur Dampfreinigung
DE102004032609B4 (de) * 2004-07-05 2008-09-11 Kramski Gmbh Filter- und Kühlelement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610705A (en) * 1984-11-06 1986-09-09 Broan Manufacturing Co. Inc. Filter for ductless range hood
US4904288A (en) * 1989-06-21 1990-02-27 Mike D. Shoffiett Filter element for circulating air systems
JPH05293318A (ja) * 1992-04-17 1993-11-09 Souriyuu Kk 厨房用フィルター材
US5525136A (en) * 1994-09-06 1996-06-11 Rosen; Richard M. Gasketed multi-media air cleaner
US20030150199A1 (en) * 2002-02-07 2003-08-14 Honda Giken Kogyo Kabushiki Kaisha Filter element
EP1433515A2 (fr) * 2002-12-23 2004-06-30 Samsung Electronics Co., Ltd. Purificateur d'air
DE102005019831A1 (de) * 2005-04-28 2006-11-02 BSH Bosch und Siemens Hausgeräte GmbH Filteranordnung für Dunstabzugshaube
DE102006005807A1 (de) * 2006-02-08 2007-08-16 BSH Bosch und Siemens Hausgeräte GmbH Filterelement für Dunstabzugshaube

Also Published As

Publication number Publication date
EP2132491A2 (fr) 2009-12-16
DE102007016542A1 (de) 2008-10-09
WO2008122485A3 (fr) 2009-09-17

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