EP2372255B1 - Grease filter for an extractor hood and vapour extractor hood - Google Patents
Grease filter for an extractor hood and vapour extractor hood Download PDFInfo
- Publication number
- EP2372255B1 EP2372255B1 EP11160109.2A EP11160109A EP2372255B1 EP 2372255 B1 EP2372255 B1 EP 2372255B1 EP 11160109 A EP11160109 A EP 11160109A EP 2372255 B1 EP2372255 B1 EP 2372255B1
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- EP
- European Patent Office
- Prior art keywords
- filter element
- grease filter
- element according
- extractor hood
- filler
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- 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.)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGESĀ ; 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 invention relates to a grease filter element for a cooker hood and a hood according to the preamble of claim 1.
- a filter element is from document US 2005/0028498 A1 known.
- a filter cartridge is generally used in which a plurality of layers of an expanded metal are arranged. 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.
- the object of the present invention is to provide a grease filter element for the separation of impurities from fumes and vapors, in particular grease, which at least reduces or at least reduces the disadvantages of known grease filter elements.
- the invention is based on the finding that this object can be achieved by providing the grease filter element with a filler which differs from the cover layer of the grease filter element in shape and / or material and is arranged in a suitable form between the cover layers.
- the object is therefore achieved by a grease filter element for an extractor hood, which has two cover layers.
- the fat filter element is characterized in that between the cover layers, a filler in the form of a bed of plastic particles is arranged.
- the grease filter element is also referred to below as a filter element.
- a cover layer is a layer of the fat filter element which, in the main flow direction of fumes and vapors, represents the first or the last layer through the filter element.
- the first position in the flow direction is also referred to below as the inflow side of the grease filter element.
- the last layer is also referred to as the clean air side of the grease filter element.
- the inflow side is thus the side of the fat filter element, which is the first of contaminated fumes and vapors flows when operating the hood.
- the clean air side is the side of the grease filter element through which the purified air leaves the grease filter element.
- the cover layers of the fat filter element according to the invention have openings through which air can enter the interior of the fat filter element and exit from the interior of the fat filter element.
- a filling of the fat filter element is called, which covers the surface of the cover layers at least partially.
- the filler completely covers at least the surface of the cover layer on the upstream side.
- the filler of a different material than the cover layer a number of advantages can be achieved.
- the material of the filler can be selected so that it has a lower specific weight than the material of the cover layer.
- the filler is exposed to the fat filter element according to the invention no mechanical stress, since it is held by the cover layers.
- the shape of the filler can therefore be selected according to fluidic aspects.
- the fat filter element according to the invention represents a filter cartridge, wherein the two cover layers in a frame, for example made of aluminum.
- the two cover layers which are designed flat, thus form together with the frame an interior in which the filler can be introduced.
- plastic particles as fillers in the fat filter element according to the invention, a number of advantages can be achieved.
- the specific weight of plastic is low, so that in this way the total weight of the fat filter element is reduced.
- plastic can be made in a cost effective manner in particulate form.
- plastic has the advantage that this fat and liquid particles can bind.
- bound or adhering to the particles fat and liquid particles can be easily solved by the plastic again.
- plastic particles can be cleaned by simply washing or rinsing in a dishwasher of grease and other contaminant particles.
- the filler which consists of plastic particles, can thus be regenerated in the dishwasher. This is advantageous over other filter materials, such as activated carbon, where the regeneration usually has to be done by consuming processes.
- the surface in the fat filter element, where fat particles and other impurities can be deposited is maximized.
- various types of plastic particles in particular different materials or shapes can be mixed together.
- the material of the filler is highly polar, as this can maximize the binding of fat and oil to the particles.
- the cover layer may be a perforated plate or an expanded metal layer.
- This type of cover layer can be used both on the upstream side and on the clean air side.
- expanded metal sheet a layer in which the openings are obtained by stretching a slotted sheet
- expanded metal sheet a layer in which the openings are obtained by stretching a slotted sheet
- a close-meshed expanded metal is used, in which the mesh size can be 3 or 4 mm, for example.
- the holes are preferably introduced by punching in a sheet.
- the perforated plate and the expanded metal may for example consist of aluminum or stainless steel.
- the filler is in the form of a bed.
- a bed is here understood to mean a layer of loose particles which are not connected or fastened to one another.
- filter mats which are made of fleece for example
- a bed of particles on the one hand the surface on which impurities can be deposited is maximized.
- a bed usually allows a certain movement of the particles relative to each other, which is particularly advantageous for the regeneration or cleaning of the grease filter element.
- plastic particles of polycarbonate, polyamide or polybutylene terephthalate (PBT) can be used.
- the filler consists of a spherical material. Due to this shape of the plastic particles, the space formed between the cover layers can be optimally filled and thereby the largest possible surface area for the deposition of impurities can be created.
- particle shapes such as oval, square or other - even irregular - geometries are possible according to the invention.
- the size of the particles of the filler is selected to be low, as this can improve the degree of greasing.
- the particles may have a size in the range of 3mm to 1cm.
- the smallest particle size of the particles is determined by the size of the openings in the cover layers.
- the largest size is limited by the height of the frame, which in turn is determined by the dimensions of the extractor hood on the suction opening and the fastening means on the suction opening.
- the filter element has a height or thickness of 6 to 20mm. With this height, the filter element according to the invention can be used in known extractor hoods as a replacement for filter cartridges, which consist exclusively of expanded metal layers, without a change to the hood is required.
- the fat filter element according to the invention also to increase the filter usable area.
- the filter useful area is the size of the area on the upstream side. Due to the filling of the filter element with particles different shapes of filter elements can be easily filled with them.
- the cover layers each have a shell shape, wherein the two shells are set with the same orientation. As a result, the filter is given the shape of a spherical section.
- the use of corrugated cover layers is possible, the valleys and elevations of the waves of the two cover layers are aligned with each other. As a result, a constant thickness of the filter element is ensured over its surface despite the increased filter effective area and a passage of unpurified air, which is also referred to as leakage, can be prevented.
- the particle size of the filler decreases to a clean air side of the grease filter element.
- the density of the plastic particles can be increased to the clean air side.
- the filter is compacted on this side and continue to ensure the reliable cleaning of the fumes and vapors.
- the decrease in the particle size can be continuous, wherein in the production, for example, in each case a layer of a first larger and then a layer of a smaller particle size are poured.
- the particles of different sizes are mixed and thus a continuous transition of the particle size.
- the at least one stabilizing device is at an angle of more than zero degrees to at least one cover layer.
- the so aligned stabilizers are also referred to as webs.
- the webs are arranged in a direction which differs from the direction of the cover layer, the webs can protrude into the space between the two cover layers. Since in this space according to the invention, the filler is provided, limit the webs in this embodiment, the movement of the filler in the direction parallel to the surface of the cover layers.
- the webs may be provided on the upper side of the cover layer on the inflow side and / or on the underside of the cover layer on the clean air side of the filter element.
- the webs may be attached to the cover sheet or layers.
- the webs are separate to the cover layers and, for example, form a three-dimensional structure, such as a grid, which can be placed between the cover layers and optionally held by a frame of the filter element.
- the webs are formed over at least part of the depth of the intermediate space of the filter element, that is, the distance between the two cover layers, chambers. If the webs extend over the entire depth of the interstice of the filter element, the chambers are closed to the sides and the filling material can move only within the respective chamber. If the height of the webs hung less than the depth of the gap, then the movement in the direction parallel to the topsheet is impeded only over part of the depth of the gap, the filler but can pass from one chamber so formed into another chamber.
- the filter element has a round shape in plan view.
- the vertical view of the filter element on the clean air side or on the inflow side is referred to as top view.
- a round shape a shape is referred to, whose surface is bounded by a boundary line, which preferably has no corners.
- a shape is designated as a round shape, in which the boundary line has over its course only direction changes of greater than 90 degrees. The direction changes are indicated by the internal angle of the change in direction.
- the round shape may therefore be, for example, a rectangle with rounded corners, a polygon with more than four corners, for example a hexagon or octagon, or be an oval.
- the shape of the filter element which is usually formed by the cover layers and an optionally provided frame, also defines the shape of the interspace of the filter element.
- the gap can be reliably filled with filler. For pointed or rectangular corners, such filling is difficult because the particles of the filler may not be able to get into the corner. In this case, therefore, the air flows through the filter element without being cleaned to become. Due to the preferred, round shape of the filter element such undesirable passage can be avoided.
- the filter element has a circular shape in plan view.
- the already mentioned advantage of preventing leaks due to the fact that no corners are provided is also achieved.
- the leakage at the corners can be ensured even with a larger particle size of the filler.
- Another advantage of the circular shape is that the filter element in this embodiment has no concrete mounting position, that is, the filter element can be introduced in different angular positions in a likewise circular intake of the hood, whereby the assembly is facilitated.
- other fastening devices for holding the filter element to the extractor hood can be used in a circular filter element.
- a bayonet lock can be used.
- the filter element can be attached by a rotary movement with optionally additional plugging movement on the hood.
- the stabilizers provided in the space between the topsheets form a grid.
- the grid in which at least two stabilizing devices intersect at least in their extension.
- the stabilizing devices in this embodiment preferably represent webs which, as defined above, project from at least one of the cover layers into the intermediate space of the filter element.
- the grid may in this embodiment be formed for example by two groups of webs, wherein the webs of each of the groups are parallel to each other and the webs of the first group and the webs of the second group, for example, perpendicular to each other.
- Other forms of gratings can also be used according to the invention.
- a grid may be used whose chambers have a honeycomb shape, ie hexagonal shape or an octagonal shape.
- the at least one stabilizer device is arranged radially.
- the stabilizers are formed by webs. These webs extend radially from one point.
- This embodiment is particularly advantageous for a circular filter element.
- the point from which the webs extend is the center of the circle.
- the webs preferably do not extend to the center in such a radial arrangement, but end at a distance therefrom.
- the webs terminate at a distance, so that even at these locations no acute angle between the outer wall, which is formed for example by a frame, and the webs are formed.
- the length of the webs in the radial direction can be the same for all webs. But it is also possible that some of the bars are longer than the other bars.
- the filler is doped.
- doping in particular a surface treatment of the particles of the filler is understood. This can be, for example, the introduction or introduction of means for increasing hygiene, that is to say sterilization of the particles.
- agents that contain or generate odors may also be used.
- the plastic particles may be doped with potassium permanganate or silver.
- the present invention relates to an extractor hood, which has a suction opening for sucking in fumes and vapors.
- the extractor hood is characterized in that at least one inventive grease filter element is provided in the suction opening of the extractor hood.
- the suction opening may be rectangular or round in the extractor hood according to the invention.
- a filter element with a circular shape can be used.
- the attachment of the filter element to the hood can be done for example by a bayonet lock.
- pins may be provided on the filter element, which extend from the periphery thereof to the outside.
- recesses or grooves may be provided in the periphery of the filter element, in which pins of a closure provided on the extractor hood can engage.
- the attachment by means of bayonet lock has the advantage that it can be easily solved but still ensures a reliable hold of the filter element to the hood.
- FIG. 1 shows a first embodiment of the fat filter element 1 according to the invention, which is also referred to below as a filter element.
- the filter element 1 represents a filter cartridge.
- a frame 12 which surrounds all lateral edges of the filter element 1, in this case a lower cover layer 10 is held on the inflow side of the filter element 1.
- the cover layer 10 consists in the illustrated embodiment of a flat expanded metal layer.
- filler is provided which consists of round Greffenpismen 13 in the illustrated embodiment.
- the filler particles 13 are tightly packed and completely fill the interior of the filter element 1 which is bounded laterally by the frame 12.
- an upper cover layer 11 is provided, which also represents a flat expanded metal layer in the illustrated embodiment. These, provided on the clean air side of the filter element 1, cover layer 11 is held in the frame 12.
- FIG. 1 are shown by dashed lines also stabilizing devices 14 in the form of webs, which may be provided in the filter element 1.
- the webs are perpendicular to the cover layers 10, 11 and have a height corresponding to the distance between the two cover layers 10, 11.
- two webs are provided so that in the interior of the filter element 1, three chambers are formed, in which the filler is added.
- the filler particles 13 of the first embodiment have, in the illustrated embodiment, apart from tolerances that are production-related, all the same size. It is understood that the shape of the particles 13 may also differ from a spherical shape. The particles 13 may, for example, also be egg-shaped or present as grains having irregular shapes. A mixture of different forms of particles 13 can also be used as filler.
- FIG. 2 shows The construction of this second embodiment of the filter element 1 essentially corresponds to that in FIG FIG. 1 shown construction.
- flat cover layers 10 and 11 are provided from expanded metal and the cover layers 10 and 11 and the filler provided therebetween are held by a frame 12.
- 10 particles 13 of a certain size are provided in a first layer on the lower cover layer.
- On this first layer is another layer of particles 13 of smaller size.
- the particle size thus decreases at the in FIG. 2 shown embodiment of layer to layer, so that on the clean air side, the particles 13 are present with the smallest particle size.
- FIG. 3 a further embodiment of the filter element 1 according to the invention is shown.
- the cover layers 10 and 11 not configured flat.
- the cover layers 10 and 11 rather have a waveform.
- the waves of the two cover layers 10 and 11 are so aligned with each other so that the thickness of the filter element 1 over its surface is constant that is constant.
- corrugated cover layers 10 and 11 are added.
- the particles 13 fill the limited by the frame 12 and the cover layers 10 and 11 interior of the filter element 1 completely.
- FIG. 4 is a schematic plan view of an embodiment of the filter element 1 according to the invention shown.
- the cover layer is recessed to allow the view of the interior of the filter element 1.
- a grid of stabilizers 14 in the form of webs is provided in this embodiment. Through the grid chambers are formed, in which the Greffenpgreg 13 are held. In FIG. 4 If the filler particles 13 are shown only in one chamber, they are also present in the other chambers.
- FIG. 5 an embodiment of the extractor hood 20 according to the invention is shown.
- the housing 21 of the extractor hood 20 and the filter element 1 are shown.
- the extractor hood 20 includes other components, such as a fan and the like.
- the housing 21 extractor hood 20 comprises in the illustrated embodiment, a viewing hood 22, which has a roof shape in the illustrated embodiment, and a lower cover 23 of the viewing hood 22.
- the suction port 24 of the extractor hood 20 is provided, can enter via the steam and fumes into the interior of the hood 20, in particular into the interior of the viewing hood 22 and then exit via an air outlet from the hood 20.
- the suction opening 24 has a circular cross-section in the illustrated embodiment.
- the suction port 24 is provided in the rear region of the lower cover 23.
- a filter element 1 is introduced in the suction port 24 in the suction port 24, a filter element 1 is introduced.
- the filter element 1 is connected by a bayonet lock 25 to the extractor hood 20, in particular at the intake opening 24 attached.
- the filter element 1 also has a circular shape.
- the lower cover layer of the filter element 1 is not shown to allow the view of the interior of the filter element 1.
- stabilizing devices 14 are provided in the form of webs in the filter element. The webs are arranged radially to the center of the filter element 1 in this embodiment.
- the stabilizers 14 terminate in the illustrated embodiment to the edge of the filter element 1 and the center of the filter element 1 at a distance.
- the webs have different lengths. But it is also possible to use webs with the same length.
- the filler particles 13, which are provided in the filter element 1 between the stabilizers 14, are in the FIG. 6 Not shown.
- the present invention provides a new and cost effective solution for filter elements that includes a special construction of the filter elements and can serve as an alternative technology to previous complex solution systems.
- the filter element according to the invention there are no delivery volume losses of hoods with higher delivery rates.
- a high Fettabscheidungsgrad can be achieved.
- the extraction behavior remains noticeably good for the customer.
- Optimal flow velocity profiles can be achieved.
- the weight of the filter is low.
- different types of granules can be mixed.
- chemical functions can be integrated, so in addition to the pure mechanical deposition of fat and a chemical deposition by a suitable choice of Materials for the filler or by treatment of the filler can be achieved. A compaction of different granule layers is possible. There is no impairment of the vapor capture rate.
- the filter is quickly converted to other granules.
- the present invention brings a significant benefit for customer service, since the filter according to the invention represents an effective retrofit filter.
- the filter usage area can be set large, which results in a longevity of the filter.
- the filter material can be doped with pleasant odors.
Description
Die Erfindung betrifft ein Fettfilterelement fĆ¼r eine Dunstabzugshaube und eine Dunstabzugshaube nach dem Oberbegriff des Anspruchs 1. Ein solches Filterelement ist aus Dokument
Bei Dunstabzugshauben, insbesondere fĆ¼r den Einsatz in KĆ¼chen, ist es bekannt Fettfilter vorzusehen. Ćber diese Fettfilter wird von der Dunstabzugshaube angesaugte verunreinigte Luft, beispielsweise in Form von DĆ¼nsten und Wrasen von Fett und anderen Partikeln, wie beispielsweise Ćl oder Wasserpartikeln, befreit. Hierzu wird in der Regel eine Filterkassette verwendet, in der mehrere Lagen eines Streckmetalls angeordnet sind. Durch die Ćffnungen in den einzelnen Streckmetalllagen und dem dadurch hervorgerufenen Richtungswechsel der DĆ¼nste und Wrasen, werden Partikel, insbesondere Fett und FlĆ¼ssigkeitspartikel aus den DĆ¼nsten und Wrasen herausgefiltert und lagern sich an den Streckmetalllagen an.For extractor hoods, especially for use in kitchens, it is known to provide grease filters. About this grease filter is sucked from the hood contaminated air, for example in the form of fumes and fumes of fat and other particles, such as oil or water particles, freed. For this purpose, a filter cartridge is generally used in which a plurality of layers of an expanded metal are arranged. 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.
Ein Nachteil dieser bekannten Filterkassetten besteht in deren Empfindlichkeit gegen Alkalien in der SpĆ¼lmaschine.A disadvantage of these known filter cartridges is their sensitivity to alkalis in the dishwasher.
Weiterhin ist beispielsweise aus der
Aufgabe der vorliegenden Erfindung ist es ein Fettfilterelement zur Abscheidung von Verunreinigungen aus DĆ¼nsten und Wrasen, insbesondere von Fett, bereitzustellen, das die Nachteile bekannter Fettfilterelemente oder behebt zumindest verringert.The object of the present invention is to provide a grease filter element for the separation of impurities from fumes and vapors, in particular grease, which at least reduces or at least reduces the disadvantages of known grease filter elements.
Der Erfindung liegt die Erkenntnis zugrunde, dass diese Aufgabe gelƶst werden kann, indem das Fettfilterelement mit einem FĆ¼llmittel versehen wird, das sich von der Decklage des Fettfilterelementes in Form und/oder Material unterscheidet und in geeigneter Form zwischen den Decklagen angeordnet ist.The invention is based on the finding that this object can be achieved by providing the grease filter element with a filler which differs from the cover layer of the grease filter element in shape and / or material and is arranged in a suitable form between the cover layers.
GemĆ¤Ć einem ersten Aspekt wird die Aufgabe daher gelƶst durch ein Fettfilterelement fĆ¼r eine Dunstabzugshaube, das zwei Decklagen aufweist. Das Fettfilterelement ist dadurch gekennzeichnet, dass zwischen den Decklagen ein FĆ¼llmittel in Form einer SchĆ¼ttung aus Kunststoffpartikeln angeordnet ist.According to a first aspect, the object is therefore achieved by a grease filter element for an extractor hood, which has two cover layers. The fat filter element is characterized in that between the cover layers, a filler in the form of a bed of plastic particles is arranged.
Das Fettfilterelement wird im Folgenden auch als Filterelement bezeichnet. Als Decklage wird im Sinne der vorliegenden Erfindung eine Lage des Fettfilterelementes bezeichnet, die in der Hauptstrƶmungsrichtung von DĆ¼nsten und Wrasen durch das Filterelement die erste oder die letzte Lage darstellt. Die erste Lage in der Strƶmungsrichtung wird im Folgenden auch als Anstrƶmseite des Fettfilterelementes bezeichnet. Die letzte Lage wird auch als Reinluftseite des Fettfilterelementes bezeichnet. Die Anstrƶmseite ist somit die Seite des Fettfilterelementes, die beim Betrieb der Dunstabzugshaube als erste von verunreinigten DĆ¼nsten und Wrasen angestrƶmt wird. Die Reinluftseite ist die Seite des Fettfilterelementes Ć¼ber die die gereinigte Luft das Fettfilterelement verlƤsst. Die Decklagen des erfindungsgemƤ-Ī²en Fettfilterelementes weisen Ćffnungen auf, Ć¼ber die Luft in das Innere des Fettfilterelementes eintreten und aus dem Inneren des Fettfilterelementes austreten kann.The grease filter element is also referred to below as a filter element. For the purposes of the present invention, a cover layer is a layer of the fat filter element which, in the main flow direction of fumes and vapors, represents the first or the last layer through the filter element. The first position in the flow direction is also referred to below as the inflow side of the grease filter element. The last layer is also referred to as the clean air side of the grease filter element. The inflow side is thus the side of the fat filter element, which is the first of contaminated fumes and vapors flows when operating the hood. The clean air side is the side of the grease filter element through which the purified air leaves the grease filter element. The cover layers of the fat filter element according to the invention have openings through which air can enter the interior of the fat filter element and exit from the interior of the fat filter element.
Als FĆ¼llmittel wird eine FĆ¼llung des Fettfilterelementes bezeichnet, das die FlƤche der Decklagen zumindest teilweise bedeckt. Vorzugsweise bedeckt dass FĆ¼llmittel zumindest die FlƤche der Decklage an der Anstrƶmseite vollstƤndig.As filling a filling of the fat filter element is called, which covers the surface of the cover layers at least partially. Preferably, the filler completely covers at least the surface of the cover layer on the upstream side.
Indem erfindungsgemĆ¤Ć das FĆ¼llmittel aus einem anderen Material besteht als die Decklage kann eine Reihe von Vorteilen erzielt werden. Zum einen kann das Material des FĆ¼llmittels so gewƤhlt werden, dass dieses ein geringeres spezifisches Gewicht aufweist, als das Material der Decklage. Zudem ist das FĆ¼llmittel bei dem erfindungsgemƤĆen Fettfilterelement keinen mechanischen Belastungen ausgesetzt, da es von den Decklagen gehalten wird. Die Form des FĆ¼llmittels kann daher nach strƶmungstechnischen Aspekten gewƤhlt werden.By according to the invention, the filler of a different material than the cover layer, a number of advantages can be achieved. On the one hand, the material of the filler can be selected so that it has a lower specific weight than the material of the cover layer. In addition, the filler is exposed to the fat filter element according to the invention no mechanical stress, since it is held by the cover layers. The shape of the filler can therefore be selected according to fluidic aspects.
Durch das Vorsehen zweier Decklagen, insbesondere einer Decklage auf der Anstrƶmseite und einer Decklage auf der gegenĆ¼berliegenden Reinluftseite, wird ein Zwischenraum gebildet, in dem FĆ¼llmittel unterschiedlichster Form zuverlƤssig gehalten werden kann. Besonders bevorzugt stellt das erfindungsgemƤĆe Fettfilterelement eine Filterkassette dar, bei der die zwei Decklagen in einem Rahmen, beispielsweise aus Aluminium gehalten werden. Hierdurch ist zum einen der Abstand zwischen den zwei Decklagen fixiert werden und zum anderen kann ein Austreten des FĆ¼llmittels an den Seiten verhindert werden. Die beiden Decklagen, die flƤchig ausgestaltet sind, bilden somit zusammen mit dem Rahmen einen Innenraum, in dem das FĆ¼llmittel eingebracht sein kann.By providing two cover layers, in particular a cover layer on the inflow side and a cover layer on the opposite clean air side, a gap is formed, can be reliably held in the filler of different shapes. Particularly preferably, the fat filter element according to the invention represents a filter cartridge, wherein the two cover layers in a frame, for example made of aluminum. As a result, on the one hand the distance between the two cover layers can be fixed and on the other hand leakage of the filler on the sides can be prevented. The two cover layers, which are designed flat, thus form together with the frame an interior in which the filler can be introduced.
Indem bei dem erfindungsgemƤĆen Fettfilterelement Kunststoffpartikel als FĆ¼llmittel verwendet werden, kann eine Reihe von Vorteilen erzielt werden. Zum einen ist das spezifische Gewicht von Kunststoff gering, so dass hierdurch auch das Gesamtgewicht des Fettfilterelementes reduziert wird. Weiterhin kann Kunststoff auf kostengĆ¼nstige Weise in Partikelform gebracht werden. SchlieĆlich weist Kunststoff den Vorteil auf, dass dieser Fett- und FlĆ¼ssigkeitspartikel binden kann. Zudem kƶnnen so gebundene oder an den Partikeln haftende Fett- und FlĆ¼ssigkeitspartikel auf einfache Weise wieder von dem Kunststoff gelƶst werden. Insbesondere kƶnnen Kunststoffpartikel durch einfaches Waschen oder SpĆ¼len in einer SpĆ¼lmaschine von Fett- und anderen Verunreinigungspartikeln gereinigt werden. Das FĆ¼llmittel, das aus Kunststoffpartikeln besteht, kann somit in der SpĆ¼lmaschine regeneriert werden. Dies ist vorteilhaft gegenĆ¼ber anderen Filtermaterialien, wie beispielsweise Aktivkohle, bei denen die Regenerierung in der Regel durch aufwƤndige Prozesse erfolgen muss.By using plastic particles as fillers in the fat filter element according to the invention, a number of advantages can be achieved. On the one hand, the specific weight of plastic is low, so that in this way the total weight of the fat filter element is reduced. Furthermore, plastic can be made in a cost effective manner in particulate form. Finally, plastic has the advantage that this fat and liquid particles can bind. In addition, bound or adhering to the particles fat and liquid particles can be easily solved by the plastic again. In particular, plastic particles can be cleaned by simply washing or rinsing in a dishwasher of grease and other contaminant particles. The filler, which consists of plastic particles, can thus be regenerated in the dishwasher. This is advantageous over other filter materials, such as activated carbon, where the regeneration usually has to be done by consuming processes.
Indem der Kunststoff als Kunststoffpartikel, die im Folgenden auch als Partikel bezeichnet werden, vorliegt, wird die OberflƤche in dem Fettfilterelement, an der sich Fettpartikel und andere Verunreinigungen ablagern kƶnnen maximiert. Zudem kƶnnen auch verschiedene Arten von Kunststoffpartikeln, insbesondere unterschiedlicher Materialien oder Formen miteinander gemischt werden. Vorzugsweise ist das Material des FĆ¼llmittels hochpolar, da hierdurch das Binden von Fett und Ćl an den Partikeln maximiert werden kann.By having the plastic as plastic particles, hereinafter also referred to as particles, the surface in the fat filter element, where fat particles and other impurities can be deposited, is maximized. In addition, various types of plastic particles, in particular different materials or shapes can be mixed together. Preferably, the material of the filler is highly polar, as this can maximize the binding of fat and oil to the particles.
Die Decklage kann ein Lochblech oder eine Streckmetalllage darstellen. Diese Art der Decklage kann sowohl auf der Anstrƶmseite als auch auf der Reinluftseite verwendet werden. ErfindungsgemĆ¤Ć ist es mƶglich beide Decklagen in der gleichen Art, das heiĆt beispielsweise als Lochblech oder Streckmetalllage auszugestalten. Alternativ, liegt es aber auch im Rahmen der Erfindung eine Decklage als Lochblech und die andere Lage als Streckmetalllage auszugestalten. Indem ein Lochblech oder eine Streckmetalllage als Decklage verwendet werden, wird dem Fettfilterelement Ć¼ber dessen FlƤche StabilitƤt verliehen. Dennoch wird der Lufteintritt aufgrund der in dem Lochblech oder Streckmetalllage vorgesehenen Ćffnungen nicht behindert. Als Streckmetalllage wird insbesondere eine Lage bezeichnet, bei der die Ćffnungen durch Strecken eines mit Schlitzen versehenen Blechs erhalten werden. Vorzugsweise wird ein engmaschiges Streckmetall verwendet, bei dem die Maschenweite beispielsweise 3 oder 4mm betragen kann. Bei einem Lochblech werden die Lƶcher vorzugsweise durch Stanzen in ein Blech eingebracht. Das Lochblech und das Streckmetall kƶnnen beispielsweise aus Aluminium oder Edelstahl bestehen.The cover layer may be a perforated plate or an expanded metal layer. This type of cover layer can be used both on the upstream side and on the clean air side. According to the invention, it is possible to design both cover layers in the same manner, that is to say, for example, as a perforated plate or expanded metal layer. Alternatively, it is also within the scope of the invention to design a cover layer as a perforated plate and the other layer as expanded metal layer. By using a perforated metal sheet or expanded metal sheet as a liner, the grease filter element becomes stability over its surface. Nevertheless, the air inlet is not obstructed due to the openings provided in the perforated plate or expanded metal layer. In particular, a layer in which the openings are obtained by stretching a slotted sheet is referred to as expanded metal sheet. Preferably, a close-meshed expanded metal is used, in which the mesh size can be 3 or 4 mm, for example. In a perforated plate, the holes are preferably introduced by punching in a sheet. The perforated plate and the expanded metal may for example consist of aluminum or stainless steel.
ErfindungsgemĆ¤Ć liegt das FĆ¼llmittel in Form einer SchĆ¼ttung vor. Als SchĆ¼ttung wird hierbei eine Schicht von losen Partikeln verstanden, die nicht miteinander verbunden oder aneinander befestigt sind. Im Gegensatz zu Filtermatten, die beispielsweise aus Vlies bestehen, ist bei einer SchĆ¼ttung von Partikeln zum einen die OberflƤche, an der sich Verunreinigungen ablagern kƶnnen maximiert. Zum anderen erlaubt eine SchĆ¼ttung in der Regel eine gewisse Bewegung der Partikel relativ zueinander, was insbesondere fĆ¼r die Regenerierung beziehungsweise Reinigung des Fettfilterelementes von Vorteil ist.According to the invention, the filler is in the form of a bed. A bed is here understood to mean a layer of loose particles which are not connected or fastened to one another. In contrast to filter mats, which are made of fleece for example, with a bed of particles on the one hand the surface on which impurities can be deposited is maximized. On the other hand, a bed usually allows a certain movement of the particles relative to each other, which is particularly advantageous for the regeneration or cleaning of the grease filter element.
GemĆ¤Ć einer AusfĆ¼hrungsform stellt das FĆ¼llmittel ein Kunststoffgranulat dar. Als Granulat wird ein Korngemenge verstanden, das in Kornform und KorngrƶĆe sehr gleichmƤĆig ist. Indem die Kornform und KorngrƶĆe gleichmƤĆig sind, kann bei einem Granulat ein ungewĆ¼nschtes Austreten oder Herausrieseln kleiner Partikel aus dem Fettfilterelement verhindert werden.According to one embodiment, the filler represents a plastic granulate. Granules are understood to be a grain mixture which is very uniform in grain form and grain size. By the grain shape and grain size are uniform, it can be prevented in a granulate unwanted leakage or trickling small particles from the fat filter element.
Als Materialien fĆ¼r das FĆ¼llmittel kommen unterschiedliche Kunststoffe in Betracht. Beispielsweise kƶnnen die Kunststoffpartikel aus Polycarbonat, Polymamid oder Polybutylenterephthalate (PBT) verwendet werden.As materials for the filler different plastics come into consideration. For example, the plastic particles of polycarbonate, polyamide or polybutylene terephthalate (PBT) can be used.
GemĆ¤Ć einer AusfĆ¼hrungsform besteht das FĆ¼llmittel aus einem kugelfƶrmigen Material. Durch diese Form der Kunststoffpartikel kann der zwischen den Decklagen gebildete Raum optimal ausgefĆ¼llt werden und dadurch eine mƶglichst groĆe OberflƤche zur Abscheidung von Verunreinigungen geschaffen werden. Allerdings sind erfindungsgemĆ¤Ć auch andere Partikelformen, wie beispielsweise oval, viereckig oder andere - auch unregelmƤĆige - Geometrien mƶglich.According to one embodiment, the filler consists of a spherical material. Due to this shape of the plastic particles, the space formed between the cover layers can be optimally filled and thereby the largest possible surface area for the deposition of impurities can be created. However, other particle shapes, such as oval, square or other - even irregular - geometries are possible according to the invention.
Vorzugsweise wird die GrƶĆe der Partikel des FĆ¼llmittels gering gewƤhlt, da dadurch der Fettabscheidungsgrad verbessert werden kann. Die Partikel kƶnnen beispielsweise eine GrƶĆe im Bereich von 3mm bis 1cm aufweisen. Die geringste Grƶ-Ī²e der Partikel bestimmt sich hierbei durch die GrƶĆe der Ćffnungen in den Decklagen. Die grƶĆte GrƶĆe wird durch die Hƶhe des Rahmens begrenzt, die wiederum durch die Abmessungen der Dunstabzugshaube an der Ansaugƶffnung und den Befestigungseinrichtungen an der Ansaugƶffnung bestimmt ist. Vorzugsweise weist das Filterelement eine Hƶhe beziehungsweise Dicke von 6 bis 20mm auf. Mit dieser Hƶhe kann das erfindungsgemƤĆe Filterelement in bekannte Dunstabzugshauben als Ersatz fĆ¼r Filterkassetten, die ausschlieĆlich aus Streckmetalllagen bestehen, eingesetzt werden, ohne dass eine Ćnderung an der Dunstabzugshaube erforderlich ist.Preferably, the size of the particles of the filler is selected to be low, as this can improve the degree of greasing. For example, the particles may have a size in the range of 3mm to 1cm. The smallest particle size of the particles is determined by the size of the openings in the cover layers. The largest size is limited by the height of the frame, which in turn is determined by the dimensions of the extractor hood on the suction opening and the fastening means on the suction opening. Preferably, the filter element has a height or thickness of 6 to 20mm. With this height, the filter element according to the invention can be used in known extractor hoods as a replacement for filter cartridges, which consist exclusively of expanded metal layers, without a change to the hood is required.
Weiterhin ist es bei dem erfindungsgemƤĆen Fettfilterelement mƶglich auch die FilternutzflƤche zu vergrƶĆern. Als FilternutzflƤche wird die GrƶĆe der FlƤche an der Anstrƶmseite bezeichnet. Aufgrund der FĆ¼llung des Filterelementes mit Partikeln kƶnnen unterschiedliche Formen von Filterelementen auf einfache Weise mit diesen gefĆ¼llt werden. So kƶnnen beispielsweise die Decklagen jeweils eine Schalenform aufweisen, wobei die beiden Schalen mit der gleichen Ausrichtung ineinander gesetzt sind. Hierdurch wird dem Filter die Form eines Kugelabschnittes verliehen. Auch ist die Verwendung gewellter Decklagen mƶglich, wobei die TƤler und Erhebungen der Wellen der beiden Decklagen jeweils miteinander ausgerichtet sind. Hierdurch wird trotz der vergrƶĆerten FilternutzflƤche eine konstante Dicke des Filterelementes Ć¼ber dessen FlƤche gewƤhrleistet und ein Durchtreten ungereinigter Luft, das auch als Leckage bezeichnet wird, kann damit verhindert werden.Furthermore, it is possible in the fat filter element according to the invention also to increase the filter usable area. The filter useful area is the size of the area on the upstream side. Due to the filling of the filter element with particles different shapes of filter elements can be easily filled with them. Thus, for example, the cover layers each have a shell shape, wherein the two shells are set with the same orientation. As a result, the filter is given the shape of a spherical section. Also, the use of corrugated cover layers is possible, the valleys and elevations of the waves of the two cover layers are aligned with each other. As a result, a constant thickness of the filter element is ensured over its surface despite the increased filter effective area and a passage of unpurified air, which is also referred to as leakage, can be prevented.
GemĆ¤Ć einer AusfĆ¼hrungsform nimmt die PartikelgrƶĆe des FĆ¼llmittels zu einer Reinluftseite des Fettfilterelementes ab. Durch diese Ausgestaltung kann die Dichte der Kunststoffpartikel zu der Reinluftseite hin vergrƶĆert werden. Hierdurch wird der Filter an dieser Seite verdichtet und die zuverlƤssige Reinigung der DĆ¼nste und Wrasen weiterhin gewƤhrleistet werden. Die Abnahme der PartikelgrƶĆe kann kontinuierlich sein, wobei bei der Herstellung beispielsweise jeweils eine Schicht einer ersten grƶĆeren und anschlieĆend eine Schicht einer kleineren TeilchengrƶĆe geschĆ¼ttet werden. Hierdurch kommt es in der Regel an den ĆbergƤngen der Schichten zu einer Vermischung der Partikel unterschiedlicher GrƶĆen und somit zu einem kontinuierlichen Ćbergang der TeilchengrƶĆe.According to one embodiment, the particle size of the filler decreases to a clean air side of the grease filter element. By this configuration, the density of the plastic particles can be increased to the clean air side. As a result, the filter is compacted on this side and continue to ensure the reliable cleaning of the fumes and vapors. The decrease in the particle size can be continuous, wherein in the production, for example, in each case a layer of a first larger and then a layer of a smaller particle size are poured. As a result, as a rule, at the transitions of the layers, the particles of different sizes are mixed and thus a continuous transition of the particle size.
In dem Fettfilterelement kann gemĆ¤Ć einer AusfĆ¼hrungsform zumindest eine Stabilisiervorrichtung zum Fixieren des FĆ¼llmittels vorgesehen sein. Die Stabilisiervorrichtung kann eine Zwischenlage darstellen, die zwischen den Decklagen angeordnet ist und entsprechend den Decklagen ausgerichtet ist, insbesondere parallel dazu liegt. Hierdurch kƶnnen beispielsweise Schichten mit unterschiedlichen TeilchengrƶĆen voneinander getrennt werden. Alternativ oder zusƤtzlich kann eine Stabilisiervorrichtung beispielsweise in Form von Stegen vorgesehen sein, die Bereiche in der FlƤche des Filterelementes abgrenzen und so ein Verrutschen des FĆ¼llmittels verhindern. Beim Verrutschen des FĆ¼llmittels kƶnnte es nƤmlich zu einer Leckage in Eckbereichen kommen, durch die verunreinigte Luft ungereinigt durchtreten kƶnnte. Die Stege kƶnnen beispielsweise senkrecht zu den Decklagen zwischen den Decklagen eingebracht sein und sich Ć¼ber einen Teil des Abstandes oder Ć¼ber den gesamten Abstand zwischen den Decklagen erstrecken.In the fat filter element, according to one embodiment, at least one stabilizing device may be provided for fixing the filler. The stabilizing device may be an intermediate layer, which is arranged between the cover layers and is aligned according to the cover layers, in particular lies parallel thereto. As a result, for example, layers having different particle sizes can be separated from one another. Alternatively or additionally, a stabilizing device may be provided, for example in the form of webs, which delimit areas in the surface of the filter element and thus prevent slippage of the filler. When slipping of the filler could namely lead to leakage in corners, could pass through the uncleaned contaminated air. The webs may for example be introduced perpendicular to the cover layers between the cover layers and extend over part of the distance or over the entire distance between the cover layers.
Vorzugsweise steht somit die mindestens eine Stabilisiervorrichtung in einem Winkel von mehr als Null Grad zu mindestens einer Decklage. Die so ausgerichteten Stabilisiervorrichtungen werden auch als Stege bezeichnet. Indem die Stege in einer Richtung angeordnet sind, die sich von der Richtung der Decklage unterscheidet, kƶnnen die Stege in den Zwischenraum zwischen den beiden Decklagen ragen. Da in diesem Zwischenraum erfindungsgemĆ¤Ć das FĆ¼llmittel vorgesehen ist, begrenzen die Stege bei dieser AusfĆ¼hrungsform die Bewegung des FĆ¼llmittels in der Richtung parallel zu der FlƤche der Decklagen. Die Stege kƶnnen an der Oberseite der Decklage an der Anstrƶmseite und/oder an der Unterseite der Decklage an der Reinluftseite des Filterelementes vorgesehen sein. Die Stege kƶnnen an der oder den Decklagen befestigt sein. Es ist aber auch mƶglich dass die Stege zu den Decklagen separat sind und beispielsweise ein dreidimensionales Gebilde, wie ein Gitter bilden, das zwischen die Decklagen gelegt und gegebenenfalls durch einen Rahmen des Filterelementes gehalten werden kann. Durch die Stege werden Ć¼ber zumindest einen Teil der Tiefe des Zwischenraums des Filterelementes, das heiĆt den Abstand zwischen den beiden Decklagen, Kammern gebildet. Erstrecken sich die Stege Ć¼ber die gesamte Tiefe des Zwischenraums des Filterelementes, sind die Kammern zu den Seiten hin abgeschlossen und das FĆ¼llmaterial kann sich nur innerhalb der jeweiligen Kammer bewegen. Ist die Hƶhe der Stege hingen geringer als die Tiefe des Zwischenraums, so ist die Bewegung in der Richtung parallel zu der Decklage nur Ć¼ber einen Teil der Tiefe des Zwischenraums behindert, das FĆ¼llmittel kann aber von einer so gebildeten Kammer in eine andere Kammer Ć¼bertreten.Preferably, therefore, the at least one stabilizing device is at an angle of more than zero degrees to at least one cover layer. The so aligned stabilizers are also referred to as webs. By the webs are arranged in a direction which differs from the direction of the cover layer, the webs can protrude into the space between the two cover layers. Since in this space according to the invention, the filler is provided, limit the webs in this embodiment, the movement of the filler in the direction parallel to the surface of the cover layers. The webs may be provided on the upper side of the cover layer on the inflow side and / or on the underside of the cover layer on the clean air side of the filter element. The webs may be attached to the cover sheet or layers. But it is also possible that the webs are separate to the cover layers and, for example, form a three-dimensional structure, such as a grid, which can be placed between the cover layers and optionally held by a frame of the filter element. By the webs are formed over at least part of the depth of the intermediate space of the filter element, that is, the distance between the two cover layers, chambers. If the webs extend over the entire depth of the interstice of the filter element, the chambers are closed to the sides and the filling material can move only within the respective chamber. If the height of the webs hung less than the depth of the gap, then the movement in the direction parallel to the topsheet is impeded only over part of the depth of the gap, the filler but can pass from one chamber so formed into another chamber.
Mittels der Stabilisiervorrichtung(en) kann sichergestellt werden, dass die Verteilung des FĆ¼llmittels in dem Zwischenraum zwischen den Decklagen auch nach einer Bewegung des Filterelementes noch gleichmƤĆig ist. Das erfindungsgemƤĆe Filterelement kann beispielsweise zu Reinigungszwecken in eine SpĆ¼lmaschine gestellt werden. Hierbei wird das Filterelement in der Regel so angeordnet, dass die Decklagen aus der Horizontalen heraus geneigt sind. In dieser Stellung besteht bei einem Filterelement ohne Stabilisiervorrichtung die Gefahr, dass sich das FĆ¼llmittel auf einer Seite des Zwischenraums ansammelt. Im weiteren Bereich des Zwischenraums befindet sich dann kein oder nur eine geringe Menge an FĆ¼llmittel, so dass die Filterwirkung in diesem Bereich verschlechtert wƤre. Beim Vorsehen von Stabilisiervorrichtungen hingegen wird das FĆ¼llmittel weitestgehend in der gewĆ¼nschten Position gehalten und auch nach einem Reinigungsvorgang kann somit eine gleichmƤĆige Verteilung des FĆ¼llmittels gewƤhrleistet werden.By means of the stabilizing device (s) it can be ensured that the distribution of the filler in the intermediate space between the cover layers is still uniform even after a movement of the filter element. The filter element according to the invention can be made, for example, for cleaning purposes in a dishwasher. In this case, the filter element is usually arranged so that the cover layers are inclined out of the horizontal. In this position, there is a risk in a filter element without a stabilizer that the filler accumulates on one side of the gap. In the wider region of the intermediate space there is then no or only a small amount of filling agent, so that the filter effect would be impaired in this area. When providing stabilizers, however, the filler is kept as far as possible in the desired position and thus even after a cleaning process, a uniform distribution of the filler can be ensured.
GemĆ¤Ć einer bevorzugten AusfĆ¼hrungsform weist das Filterelement in der Draufsicht eine runde Form auf. Als Draufsicht wird hierbei die senkrechte Ansicht des Filterelementes auf die Reinluftseite oder auf die Anstrƶmseite bezeichnet. Als runde Form wird eine Form bezeichnet, deren FlƤche durch eine Begrenzungslinie begrenzt wird, die vorzugsweise keine Ecken aufweist. Insbesondere wird als runde Form eine Form bezeichnet, bei der die Begrenzungslinie Ć¼ber deren Verlauf ausschlieĆlich RichtungsƤnderungen von grƶĆer 90 Grad aufweist. Die RichtungsƤnderungen werden hierbei durch den Innenwinkel der RichtungsƤnderung angegeben. Die runde Form kann daher beispielsweise ein Rechteck mit abgerundeten Ecken, ein Mehreck mit mehr als vier Ecken, beispielsweise ein Sechseck oder Achteck, sein oder ein Oval sein.According to a preferred embodiment, the filter element has a round shape in plan view. In this case, the vertical view of the filter element on the clean air side or on the inflow side is referred to as top view. As a round shape, a shape is referred to, whose surface is bounded by a boundary line, which preferably has no corners. In particular, a shape is designated as a round shape, in which the boundary line has over its course only direction changes of greater than 90 degrees. The direction changes are indicated by the internal angle of the change in direction. The round shape may therefore be, for example, a rectangle with rounded corners, a polygon with more than four corners, for example a hexagon or octagon, or be an oval.
Die Form des Filterelementes, die in der Regel durch die Decklagen und einen gegebenenfalls vorgesehenen Rahmen gebildet wird, definiert auch die Form des Zwischenraums des Filterelementes. Indem an der Form keine rechteckigen oder spitzen Ecken vorhanden sind, kann der Zwischenraum zuverlƤssig mit FĆ¼llmittel gefĆ¼llt werden. Bei spitzen oder rechteckigen Ecken ist ein solches BefĆ¼llen schwierig, da die Partikel des FĆ¼llmittels gegebenenfalls nicht in die Ecke gelangen kƶnnen. In diesem Fall strƶmt daher die Luft durch das Filterelement hindurch ohne gereinigt zu werden. Durch die bevorzugte, runde Form des Filterelements kann ein solches unerwĆ¼nschtes Durchtreten vermieden werden.The shape of the filter element, which is usually formed by the cover layers and an optionally provided frame, also defines the shape of the interspace of the filter element. By having no rectangular or sharp corners on the mold, the gap can be reliably filled with filler. For pointed or rectangular corners, such filling is difficult because the particles of the filler may not be able to get into the corner. In this case, therefore, the air flows through the filter element without being cleaned to become. Due to the preferred, round shape of the filter element such undesirable passage can be avoided.
GemĆ¤Ć einer AusfĆ¼hrungsform weist das Filterelement in Draufsicht eine kreisrunde Form auf. Bei dieser AusfĆ¼hrungsform wird ebenfalls der bereits erwƤhnte Vorteil der Verhinderung von Leckagen aufgrund der Tatsache, dass keine Ecken vorgesehen sind, erzielt. Bei einem kreisrunden Filterelement kann die Leckage an den Ecken auch bei einer grƶĆeren PartikelgrƶĆe des FĆ¼llmittels gewƤhrleistet werden. Ein weiterer Vorteil, den die kreisrunde Form mit sich bringt, ist, dass das Filterelement bei dieser AusfĆ¼hrungsform keine konkrete Einbauposition besitzt, das heiĆt das Filterelement kann in unterschiedlichen Winkelpositionen in eine ebenfalls kreisrunde Ansaugƶffnung der Dunstabzugshaube eingebracht werden, wodurch die Montage erleichtert wird. Zudem kƶnnen bei einem kreisrunden Filterelement auch andere Befestigungsvorrichtungen zum Halten des Filterelementes an der Dunstabzugshaube verwendet werden. So kann beispielsweise ein Bajonettverschluss verwendet werden. Ćber den Bajonettverschluss kann das Filterelement durch eine Drehbewegung mit gegebenenfalls zusƤtzlicher Steckbewegung an der Dunstabzugshaube befestigt werden.According to one embodiment, the filter element has a circular shape in plan view. In this embodiment, the already mentioned advantage of preventing leaks due to the fact that no corners are provided is also achieved. With a circular filter element, the leakage at the corners can be ensured even with a larger particle size of the filler. Another advantage of the circular shape is that the filter element in this embodiment has no concrete mounting position, that is, the filter element can be introduced in different angular positions in a likewise circular intake of the hood, whereby the assembly is facilitated. In addition, other fastening devices for holding the filter element to the extractor hood can be used in a circular filter element. For example, a bayonet lock can be used. About the bayonet lock the filter element can be attached by a rotary movement with optionally additional plugging movement on the hood.
GemĆ¤Ć einer AusfĆ¼hrungsform bilden die Stabilisiervorrichtungen, die in dem Zwischenraum zwischen den Decklagen vorgesehen sind, ein Gitter. Als Gitter wird hierbei eine solche Anordnung der Stabilisiervorrichtungen bezeichnet, bei der sich zumindest zwei Stabilisiervorrichtungen zumindest in deren VerlƤngerung schneiden. Die Stabilisiervorrichtungen stellen bei dieser AusfĆ¼hrungsform vorzugsweise Stege dar, die wie oben definiert, von mindestens einer der Decklagen aus in den Zwischenraum des Filterelementes ragen. Das Gitter kann bei dieser AusfĆ¼hrungsform beispielsweise durch zwei Gruppen von Stegen gebildet werden, wobei die Stege jeder der Gruppen parallel zueinander liegen und die Stege der ersten Gruppe und die Stege der zweiten Gruppe beispielsweise senkrecht zueinander stehen. Auch andere Formen von Gittern kƶnnen erfindungsgemĆ¤Ć verwendet werden. So kann beispielsweise ein Gitter verwendet werden, dessen Kammern eine Wabenform, das heiĆt Sechseckform oder eine Achteckform aufweisen.According to one embodiment, the stabilizers provided in the space between the topsheets form a grid. In this case, such an arrangement of the stabilizing devices is referred to as the grid, in which at least two stabilizing devices intersect at least in their extension. The stabilizing devices in this embodiment preferably represent webs which, as defined above, project from at least one of the cover layers into the intermediate space of the filter element. The grid may in this embodiment be formed for example by two groups of webs, wherein the webs of each of the groups are parallel to each other and the webs of the first group and the webs of the second group, for example, perpendicular to each other. Other forms of gratings can also be used according to the invention. Thus, for example, a grid may be used whose chambers have a honeycomb shape, ie hexagonal shape or an octagonal shape.
GemĆ¤Ć einer AusfĆ¼hrungsform ist die mindestens eine Stabilisiervorrichtung radial angeordnet. Auch bei dieser AusfĆ¼hrungsform werden die Stabilisiervorrichtungen durch Stege gebildet. Diese Stege erstrecken sich von einem Punkt aus strahlenfƶrmig. Diese AusfĆ¼hrungsform ist insbesondere bei einem kreisrunden Filterelement von Vorteil. Der Punkt von dem aus sich die Stege erstrecken ist hierbei der Mittelpunkt des Kreises. Die Stege erstrecken sich bei einer solchen strahlenfƶrmigen Anordnung vorzugsweise nicht bis zum dem Mittelpunkt, sondern enden in einem Abstand dazu. Hierdurch wird die Bildung von spitzen Winkeln zwischen den Stegen im Bereich des Mittelpunktes verhindert. Auch zu dem ƤuĆeren Rand des Filterelementes enden die Stege vorzugsweise in einem Abstand, so dass auch an diesen Stellen keine spitzen Winkel zwischen der AuĆenwand, die beispielsweise durch einen Rahmen gebildet wird, und den Stegen gebildet werden. Die LƤnge der Stege in radialer Richtung kann bei allen Stegen gleich sein. Es ist aber auch mƶglich, dass einige der Stege lƤnger sind als die anderen Stege.According to one embodiment, the at least one stabilizer device is arranged radially. Also in this embodiment, the stabilizers are formed by webs. These webs extend radially from one point. This embodiment is particularly advantageous for a circular filter element. The point from which the webs extend is the center of the circle. The webs preferably do not extend to the center in such a radial arrangement, but end at a distance therefrom. As a result, the formation of acute angles between the webs in the region of the center is prevented. Also preferably to the outer edge of the filter element, the webs terminate at a distance, so that even at these locations no acute angle between the outer wall, which is formed for example by a frame, and the webs are formed. The length of the webs in the radial direction can be the same for all webs. But it is also possible that some of the bars are longer than the other bars.
GemĆ¤Ć einer AusfĆ¼hrungsform ist das FĆ¼llmittel dotiert. Als Dotierung wird insbesondere eine OberflƤchenbehandlung der Partikel des FĆ¼llmittels verstanden. Diese kann beispielsweise das Auf- oder Einbringen von Mitteln zur Hygienesteigerung das heiĆt Sterilisation der Partikel sein. Allerdings kƶnnen auch Mittel verwendet werden, die Geruchsstoffe enthalten oder generieren. Beispielsweise kƶnnen die Kunststoffpartikel mit Kaliumpermanganat oder Silber dotiert sein.According to one embodiment, the filler is doped. As doping, in particular a surface treatment of the particles of the filler is understood. This can be, for example, the introduction or introduction of means for increasing hygiene, that is to say sterilization of the particles. However, agents that contain or generate odors may also be used. For example, the plastic particles may be doped with potassium permanganate or silver.
GemĆ¤Ć einem weiteren Aspekt betrifft die vorliegende Erfindung eine Dunstabzugshaube, die eine Ansaugƶffnung zum Ansaugen von DĆ¼nsten und Wrasen aufweist. Die Dunstabzugshaube ist dadurch gekennzeichnet, dass in der Ansaugƶffnung der Dunstabzugshaube mindestens ein erfindungsgemƤĆes Fettfilterelement vorgesehen ist.According to a further aspect, the present invention relates to an extractor hood, which has a suction opening for sucking in fumes and vapors. The extractor hood is characterized in that at least one inventive grease filter element is provided in the suction opening of the extractor hood.
Als Ansaugƶffnung der Dunstabzugshaube wird die Ćffnung bezeichnet, Ć¼ber die DĆ¼nste und Wrasen in die Dunstabzugshaube eintreten. Die Ansaugƶffnung kann daher auch als Eintrittsƶffnung bezeichnet werden. An einem in der Ansaugƶffnung der Dunstabzugshaube vorgesehenen Fettfilterelement scheiden sich aus den mit Fett und anderen Verunreinigungen beladenen DĆ¼nsten und Wrasen Verunreinigungsteilchen, beispielsweise in Form von Fetttrƶpfchen, ab. Indem das erfindungsgemƤĆe Fettfilterelement verwendet wird, ist zum einen eine effiziente Abscheidung der Partikel mƶglich, da die OberflƤche in dem Fettfilterelement, an dem eine Abscheidung erfolgen kann, groĆ ist. Zum anderen kann das Fettfilterelement auf einfache Weise regeneriert werden. Insbesondere kann das Fettfilterelement, da dessen FĆ¼llmittel Kunststoffpartikel sind, in der SpĆ¼lmaschine gereinigt werden.The intake opening of the extractor hood is the opening through which steam and steam enter the extractor hood. The suction port can therefore also be referred to as an inlet opening. At a provided in the suction opening of the extractor hood fat filter element are separated from the laden with fat and other impurities vapors and fumes impurity particles, for example in the form of fat droplets from. By using the fat filter element according to the invention, on the one hand, an efficient separation of the particles is possible, since the surface in the fat filter element, where deposition can take place, is large. On the other hand, the fat filter element can be easily regenerated. In particular, the fat filter element, since the filler are plastic particles, are cleaned in the dishwasher.
Die Ansaugƶffnung kann bei der erfindungsgemƤĆen Dunstabzugshaube rechteckig oder rund ausgebildet sein. Bei einer kreisrunden Ansaugƶffnung in der Dunstabzugshaube kann ein Filterelement mit kreisrunder Form verwendet werden. Bei dieser AusfĆ¼hrungsform kann die Befestigung des Filterelementes an der Dunstabzugshaube beispielsweise durch einen Bajonettverschluss erfolgen. Hierzu kƶnnen an dem Filterelement Stifte vorgesehen sein, die sich von dessen Umfang aus nach auĆen erstrecken. Alternativ kƶnnen Vertiefungen oder Nuten in dem Umfang des Filterelementes vorgesehen sein, in die Stifte eines an der Dunstabzugshaube vorgesehenen Verschlusses eingreifen kƶnnen. Die Befestigung mittels Bajonettverschluss weist den Vorteil auf, dass sie einfach gelƶst werden kann aber dennoch einen zuverlƤssigen Halt des Filterelementes an der Dunstabzugshaube gewƤhrleistet.The suction opening may be rectangular or round in the extractor hood according to the invention. With a circular suction opening in the extractor hood, a filter element with a circular shape can be used. In this embodiment, the attachment of the filter element to the hood can be done for example by a bayonet lock. For this purpose, pins may be provided on the filter element, which extend from the periphery thereof to the outside. Alternatively, recesses or grooves may be provided in the periphery of the filter element, in which pins of a closure provided on the extractor hood can engage. The attachment by means of bayonet lock has the advantage that it can be easily solved but still ensures a reliable hold of the filter element to the hood.
Vorteile und Merkmale, die bezĆ¼glich des erfindungsgemƤĆen Fettfilterelementes beschrieben werden, gelten - soweit anwendbar - auch fĆ¼r die erfindungsgemƤĆe Dunstabzugshaube und umgekehrt.Advantages and features that are described with respect to the fat filter element according to the invention apply - as far as applicable - for the inventive extractor hood and vice versa.
Die Erfindung wird im Folgenden erneut unter Bezugnahme auf die beiliegenden Zeichnungen erlƤutert. Hierbei zeigen:
-
Figur 1 : eine schematische, perspektivische Schnittdarstellung einer ersten AusfĆ¼hrungsform des erfindungsgemƤĆen Fettfilterelementes; -
Figur 2 : eine schematische, perspektivische Schnittdarstellung einer zweiten AusfĆ¼hrungsform des erfindungsgemƤĆen Fettfilterelementes; -
Figur 3 : eine schematische Schnittdarstellung einer dritten AusfĆ¼hrungsform des erfindungsgemƤĆen Fettfilterelementes; -
Figur 4 : eine schematische Draufsicht auf eine AusfĆ¼hrungsform des erfindungsgemƤĆen Filterelementes -
Figur 5 : eine schematische Schnittansicht einer AusfĆ¼hrungsform der erfindungsgemƤĆen Dunstabzugshaube; und -
Figur 6 : eine schematische Untersicht der AusfĆ¼hrungsform der Dunstabzugshaube nachFigur 5 .
-
FIG. 1 a schematic, perspective sectional view of a first embodiment of the fat filter element according to the invention; -
FIG. 2 a schematic, perspective sectional view of a second embodiment of the fat filter element according to the invention; -
FIG. 3 a schematic sectional view of a third embodiment of the fat filter element according to the invention; -
FIG. 4 : A schematic plan view of an embodiment of the filter element according to the invention -
FIG. 5 a schematic sectional view of an embodiment of the extractor hood according to the invention; and -
FIG. 6 : A schematic bottom view of the embodiment of the hood afterFIG. 5 ,
In
Wrasen, der das in einer Dunstabzugshaube (in
Die FĆ¼llmittelpartikel 13 der ersten AusfĆ¼hrungsform besitzen in der dargestellten AusfĆ¼hrungsform, abgesehen von Toleranzen, die herstellungstechnisch bedingt sind, alle die gleiche GrƶĆe. Es versteht sich, dass die Form der Partikel 13 auch eine von einer Kugelform abweichen kann. Die Partikel 13 kƶnnen beispielsweise auch eifƶrmig oder als Kƶrner mit unregelmƤĆigen Formen vorliegen. Auch eine Mischung unterschiedlicher Formen von Partikeln 13 kann als FĆ¼llmittel verwendet werden.The
ZusƤtzlich oder alternativ zu voneinander abweichenden Formen kƶnnen auch Partikel 13 unterschiedlicher GrƶĆe in einem Filterelement vorgesehen sein. Eine Mƶglichkeit einer solchen Partikelverteilung ist in der
In
In
In
In der unteren Abdeckung 23 ist die Ansaugƶffnung 24 der Dunstabzugshaube 20 vorgesehen, Ć¼ber die DĆ¼nste und Wrasen in das Innere der Dunstabzugshaube 20, insbesondere in das Innere der Sichthaube 22 eintreten und dann Ć¼ber einen Luftauslass aus der Dunstabzugshaube 20 austreten kƶnnen.In the
Die Ansaugƶffnung 24 weist in der dargestellten AusfĆ¼hrungsform einen kreisrunden Querschnitt auf. Wie sich insbesondere aus
Die vorliegende Erfindung ist nicht auf die in den Figuren gezeigten AusfĆ¼hrungsformen beschrƤnkt. Es ist mƶglich, dass eines oder mehrere Merkmale einer ersten gezeigten AusfĆ¼hrungsform in einer anderen gezeigten oder nicht gezeigten AusfĆ¼hrungsform verwirklicht sind, ohne dass die weiteren Merkmale der ersten gezeigten AusfĆ¼hrungsform ebenfalls erfĆ¼llt sein mĆ¼ssen. So kann beispielsweise in einem Filterelement, in dem die Decklagen eine Wellenform aufweisen FĆ¼llmittel vorgesehen sein, dessen PartikelgrƶĆe zu der Reinluftseite hin abnimmt. Auch kann die erfindungsgemƤĆe Dunstabzugshaube eine andere als die in den Figuren gezeigte Form aufweisen.The present invention is not limited to the embodiments shown in the figures. It is possible that one or more features of a first embodiment shown are realized in another embodiment shown or not shown, without the other features of the first embodiment shown also having to be fulfilled. Thus, for example, be provided in a filter element in which the cover layers have a waveform filler, the particle size decreases towards the clean air side. Also, the extractor hood according to the invention may have a different shape than shown in the figures.
Mit der vorliegenden Erfindung wird eine neue und kostengĆ¼nstige Lƶsung fĆ¼r Filterelemente geliefert, die einen besonderen Aufbau der Filterelemente umfasst und als Alternativtechnologie zu bisherigen komplexen Lƶsungssystemen dienen kann.The present invention provides a new and cost effective solution for filter elements that includes a special construction of the filter elements and can serve as an alternative technology to previous complex solution systems.
Mit der vorliegenden Erfindung wird eine Reihe von Vorteilen erzielt. Durch das erfindungsgemƤĆe Filterelement entstehen keine Fƶrdervolumenverluste von Hauben mit hƶherer Fƶrderleistung. Zudem kann ein hoher Fettabscheidungsgrad erzielt werden. Das Absaugverhalten bleibt fĆ¼r den Kunden erkennbar gut. Optimale Anstrƶmgeschwindigkeitsprofile kƶnnen erlangt werden. Es besteht wie bisher eine leichte Montierbarkeit. Das Gewicht des Filters ist gering. Zudem kƶnnen unterschiedliche Granulatarten gemischt werden. Bei dem erfindungsgemƤĆen Filter sind chemische Funktionen integrierbar, so kann neben der reinen mechanischen Abscheidung von Fett auch eine chemische Abscheidung durch geeignete Wahl des Materials fĆ¼r das FĆ¼llmittel oder durch Behandlung des FĆ¼llmittels erzielt werden. Eine Verdichtung unterschiedlicher Granulatschichten ist mƶglich. Es besteht keine BeeintrƤchtigung der Wrasenfangrate. Zudem ist der Filter schnell auf andere Granulate umgestellt. Je polarer das Granulat, desto besser wirkt die Fettabscheidung. Weiterhin bringt die vorliegende Erfindung einen erheblichen Nutzen fĆ¼r den Kundendienst, da der erfindungsgemƤĆe Filter einen effektiven NachrĆ¼stfilter darstellt. An einer Dunstabzugshaube, in der das Filterelement eingesetzt werden soll, sind zudem keine UmbaumaĆnahmen erforderlich. Die FilternutzflƤche kann groĆ eingestellt werden, wodurch eine Langlebigkeit des Filters erzielt wird. SchlieĆlich kann das Filtermaterial mit angenehmen Geruchsstoffen dotiert sein.With the present invention a number of advantages are achieved. Due to the filter element according to the invention there are no delivery volume losses of hoods with higher delivery rates. In addition, a high Fettabscheidungsgrad can be achieved. The extraction behavior remains noticeably good for the customer. Optimal flow velocity profiles can be achieved. As before, it is easy to mount. The weight of the filter is low. In addition, different types of granules can be mixed. In the filter according to the invention chemical functions can be integrated, so in addition to the pure mechanical deposition of fat and a chemical deposition by a suitable choice of Materials for the filler or by treatment of the filler can be achieved. A compaction of different granule layers is possible. There is no impairment of the vapor capture rate. In addition, the filter is quickly converted to other granules. The more polar the granules, the better the fat deposits. Furthermore, the present invention brings a significant benefit for customer service, since the filter according to the invention represents an effective retrofit filter. On a cooker hood, in which the filter element is to be used, no conversion measures are required. The filter usage area can be set large, which results in a longevity of the filter. Finally, the filter material can be doped with pleasant odors.
- 11
- FettfilterelementGrease filter element
- 1010
- Decklage AnstrƶmseiteCover layer inflow side
- 1111
- Decklage ReinluftseiteCover layer clean air side
- 1212
- Rahmenframe
- 1313
- FĆ¼llmittelpartikelfiller particles
- 1414
- Stabilisiervorrichtungstabilizing
- 2020
- DunstabzugshaubeHood
- 2121
- GehƤusecasing
- 2222
- SichthaubeViewing cover
- 2323
- Untere AbdeckungLower cover
- 2424
- Ansaugƶffnungsuction
- 2525
- Bajonettverschlussbayonet catch
- WW
- Hauptstrƶmungsrichtung WrasenMain flow direction Wrasen
Claims (15)
- Grease filter element for an extractor hood, wherein the grease filter element (1) has two cover layers (10, 11) and a filling material in the form of a filler is arranged between the cover layers (10, 11), characterised in that the filling material consists of plastic particles (13).
- Grease filter element according to claim 1, characterised in that the cover layer (10, 11) represents a perforated sheet or an expanded metal layer.
- Grease filter element according to one of claims 1 or 2, characterised in that the filling material represents a granulate.
- Grease filter element according to one of claims 1 to 3, characterised in that the filling material consists of plastic, in particular polycarbonate, polyamide or PBT.
- Grease filter element according to one of claims 1 to 4, characterised in that the filling material consists of a spherical material.
- Grease filter element according to one of claims 1 to 5, characterised in that the particle size of the filling material decreases towards a clean air side of the grease filter element (1).
- Grease filter element according to one of claims 1 to 6, characterised in that at least one stabilising apparatus (14) for fixing the filling material is provided in the grease filter element (1).
- Grease filter element according to claim 7, characterised in that the at least one stabilising apparatus (14) is at an angle of more than zero degrees relative to at least one cover layer (10, 11).
- Grease filter element according to one of claims 1 to 8, characterised in that the filter element (1) has a round shape in the topview.
- Grease filter element according to claim 9, characterised in that the filter element (1) has a circular shape in the top view.
- Grease filter element according to one of claims 7 to 10, characterised in that the stabilising apparatuses (14) form a grid.
- Grease filter element according to one of claims 7 to 11, characterised in that the at least one stabilising apparatus (14) is arranged radially.
- Grease filter element according to one of claims 1 to 12, characterised in that the filter is doped.
- Extractor hood having a suction opening (24) for taking in vapour and waste steam, characterised in that at least one grease filter element (1) according to one of claims 1 to 13 is provided in the suction opening (24).
- Extractor hood according to claim 14, characterised in that the grease filter element (1) is fastened to the extractor hood (20) via a bayonet joint.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010003383 DE102010003383A1 (en) | 2010-03-29 | 2010-03-29 | Grease filter element for an extractor hood and an extractor hood |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2372255A2 EP2372255A2 (en) | 2011-10-05 |
EP2372255A3 EP2372255A3 (en) | 2012-09-05 |
EP2372255B1 true EP2372255B1 (en) | 2015-12-16 |
Family
ID=44303331
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP11160109.2A Active EP2372255B1 (en) | 2010-03-29 | 2011-03-29 | Grease filter for an extractor hood and vapour extractor hood |
Country Status (3)
Country | Link |
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EP (1) | EP2372255B1 (en) |
DE (1) | DE102010003383A1 (en) |
ES (1) | ES2557458T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE202014101065U1 (en) * | 2014-03-10 | 2015-06-12 | BĆ*RO GmbH & Co. KG | Bulk goods frame with clay granules |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2422574A1 (en) * | 1974-05-09 | 1975-11-20 | Collo Gmbh | Filtering granules for eliminating unpleasant odours - containing acidic or basic chemisorption material and moisture absorbent |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2978064A (en) * | 1959-02-19 | 1961-04-04 | Do More Products Corp | Gas purifier |
DE2748439A1 (en) * | 1976-11-02 | 1978-05-03 | Engelbert Ing Sonnleitner | Vapour extractor hood with self-cleaning channels - has partitions guiding air flow upwards as dirt particles sink into cleaning liquid in channels |
DE2826237C2 (en) * | 1978-06-15 | 1981-11-19 | Riensch & Held, 2000 Hamburg | Grease filters, in particular for extractor hoods |
DE8805324U1 (en) * | 1988-04-21 | 1988-07-07 | Buercher-Siegrist, Rosmarie, 8029 Sauerlach, De | |
DE3813563C2 (en) * | 1988-04-22 | 2002-01-17 | Mhb Filtration Gmbh & Co Kg | Adsorption filter with high air permeability |
US4923725A (en) * | 1988-07-29 | 1990-05-08 | E. I. Du Pont De Nemours And Company | Article for absorbing cooking grease |
EP0955087B1 (en) * | 1998-05-08 | 2008-12-24 | Toyobo Co., Ltd. | Gas adsorption sheet and air-purifying filter |
DE19962253A1 (en) * | 1999-12-22 | 2001-09-13 | Bsh Bosch Siemens Hausgeraete | Filter cassette for extractor hoods |
US7041159B2 (en) * | 2003-08-04 | 2006-05-09 | Phillips Plastics Corporation | Separation apparatus |
DE20209792U1 (en) * | 2002-06-24 | 2002-09-26 | Klinger Werner | filtering device |
-
2010
- 2010-03-29 DE DE201010003383 patent/DE102010003383A1/en not_active Withdrawn
-
2011
- 2011-03-29 ES ES11160109.2T patent/ES2557458T3/en active Active
- 2011-03-29 EP EP11160109.2A patent/EP2372255B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2422574A1 (en) * | 1974-05-09 | 1975-11-20 | Collo Gmbh | Filtering granules for eliminating unpleasant odours - containing acidic or basic chemisorption material and moisture absorbent |
Also Published As
Publication number | Publication date |
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EP2372255A2 (en) | 2011-10-05 |
DE102010003383A1 (en) | 2011-09-29 |
EP2372255A3 (en) | 2012-09-05 |
ES2557458T3 (en) | 2016-01-26 |
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