EP2803913B1 - Filter element for an extractor hood and extractor hood - Google Patents

Description

The present invention relates to a filter element for an extractor hood and an extractor hood.

In the case of extractor hoods, it is known to use at least one filter element by means of which impurities from vapors, in particular fat and liquid particles, are separated and thus separated from the air flow. Such filter elements, which are also referred to as grease filters, usually have a permanently mounted structure. For example, expanded metal filter elements are known. Several layers of expanded metal are held in a frame. Furthermore, so-called eddy current filters are known in which several profiles are held in a frame and thus lead to turbulence in the air passing through the profiles.

A disadvantage of the known filter elements is that they each represent a structural unit that is difficult to clean for the user of the extractor hood and therefore the degree of separation that can be achieved with the filter element decreases over time. In addition, some of these filter elements have a complex structure and their manufacture and cleaning is therefore time-consuming.

WO 2009/106804 A2 describes a grease filter and a suction device with such a filter. The filter is formed from a first frame and a second frame, a first set of baffles being mounted in the first frame and a second set of baffles being mounted in the second frame. Handles are provided on the outer frame of the filter and extend forwardly from the front of the filter.

EP 0 438 676 A1 discloses an apparatus for separating fluids. The device consists of two surface elements arranged at a distance from one another. The surface elements are folded on two opposite long sides and provided there with a hinge and a lock. Alternatively, the surface elements can also be connected to one another via a threaded socket and a screw.

US 2009/0194093 A1 discloses a grease filter consisting of an upper and a lower profile arrangement. Each of these arrangements consists of a frame and a number of individual profiles. On the frame of the lower profile arrangement, handles are provided which can be pivoted relative to the underside of the lower profile arrangement.

WO 2009/024257 A2 describes a filter having a first element with a first surface, at least a first, at least a second and at least a third opening. A first sidewall may extend substantially normal from the surface. The filter includes a second element that is releasably connected to the first element. The second member includes a second surface, at least one second opening, and a side wall adjacent to the first side wall. The first element and the second element are connected via a locking mechanism. According to one embodiment, a key part comprising a handle end 46 comprises a pin end with locking pins and a keyhole. The key part can be connected to the first element and the keyhole can be provided in the second element.

A disadvantage of these known filters and devices is that they have a complex structure.

The object of the present invention is therefore to create a filter element and an extractor hood which, with a simple structure, enable a reliably high degree of separation over a long period of time, in that the filter element can be cleaned in a simple manner.

The invention is based on the knowledge that this object can be achieved in that the filter element can be at least partially dismantled, that is to say taken apart, in a simple manner by the user.

According to a first aspect, the invention therefore relates to a filter element for an extractor hood for separating impurities from fumes. The filter element has an at least partially air-permeable filter body. The filter element is characterized in that the filter body consists of the filter element a first filter part with a flat base and a second filter part with a flat base, that the filter parts are detachably connected to each other, that at least one slot is made in the base of the filter parts, that each slot in the first filter part corresponds to each slot in the second filter part is arranged offset that the filter element comprises a handle, by means of which the filter element can be introduced into a suction opening of an extractor hood and removed from it, that the handle is used to operate at least one fastening element by means of which the filter element is fastened or held in the suction opening, that the handle is arranged between the first filter part and the second filter part and is at least partially held between the two filter parts and that a connecting element, which is used to connect the two filter parts of the filter body, engages the handle.

According to the present invention, a filter element is understood in particular to be a grease filter element for separating grease and liquid droplets or particles from vapors. The filter element is preferably a so-called filter cassette which can be inserted into the suction opening of the extractor hood and fastened there. The extractor hood is preferably a kitchen extractor hood for the household. The extractor hood can be, for example, a forge, a built-in hood, an intermediate hood or a flat screen hood.

According to the invention, the filter element has an at least partially air-permeable filter body. A hollow body is referred to here as a filter body, which has at least one air inlet opening in its underside and at least one air outlet opening in its upper side. The filter body consists of a first filter part with a flat base and a second filter part with a flat base. The first filter part is also referred to below as the lower part and the second filter part is also referred to as the upper part.

Unless otherwise stated, information such as above or below relates in the context of the invention to the filter element when it is installed or inserted in the extractor hood. In particular, the side facing the inflowing vapor is used as the bottom side and the side facing the clean air is used as the top side designated. The side of the components that faces the user when the filter element is installed in the extractor hood is referred to as the front or front. The back or back refers to the opposite side of the components. The back is usually facing the wall of the room to which the extractor hood is attached. The length of the components of the filter element is their dimension in the direction between the front and back.

The two filter parts of the filter element according to the invention each have a flat base. The base has an elongated rectangular shape. The longer dimension of the base area is also referred to below as the length of the filter element. The dimension perpendicular to this in the area of the base is called the width. The filter element is preferably inserted into the suction opening of the extractor hood in such a way that the length of the filter element lies in the depth direction of the extractor hood and the suction opening.

According to the invention, the two filter parts of the filter element are detachably connected to one another. A releasable connection is understood to mean, in particular, a connection that can be released by the user, preferably without tools, but at least without destruction. The releasable connection is preferably a form-fit connection and / or a force-fit connection. For example, the releasable connection can be plugging into one another, latching and / or screwing. The releasable connection between the filter parts can take place directly between the filter parts. Corresponding connecting elements are provided on at least one of the filter parts. Alternatively or additionally, however, the filter parts can also be indirectly connected to one another via at least one separate connecting element. In this case, the connecting element can for example comprise a component arranged between the filter parts, for example a handle of the filter element.

At least one slot is made in each of the base surfaces of the filter parts. A slot is an opening or a passage in which one dimension in the base area is larger than the other dimension in the base area. The slots are thus, for example, rectangular openings or elongated holes. At least one slot is made in each of the filter parts. If several slots are made in a filter part, they are preferably aligned parallel to one another.

Each slot in the first filter part is offset from each slot in the second filter part. An offset of the slots in the two filter parts with respect to one another is an arrangement of the slots in which the slots of the two filter parts do not overlap in a vertical projection onto the base of one of the filter elements when the filter element is assembled.

The filter parts are arranged in such a way that the base surfaces of the two filter parts are parallel to one another.

Since the at least partially air-permeable filter body of the filter element consists according to the invention of two filter parts, the filter element has a simple structure overall. In particular, the number of parts of the components forming the filter element is limited. Disassembly and assembly of the filter element, in particular for cleaning purposes, is made easier. Because the filter parts each have a flat base, on the one hand the installation space that the filter element takes up in the installed state is less than in the case of a filter element which, for example, has a conical shape or the shape of a truncated pyramid. Rather, the filter element according to the invention has a shape which corresponds to the shape of conventional filter cassettes. Thus, for example, an expanded metal filter cassette can be replaced by the filter element according to the invention without structural changes having to be made to the extractor hood. In addition, the flat base ensures a uniform flow of air inlet openings, in particular slots, in the base. Furthermore, the structure and thus the manufacture of the filter element are simplified by the filter parts with flat base surfaces. Finally, the cleaning of the filter element is also simplified in the case of filter parts with a flat base. The contaminated vapor flows directly against the underside of the filter element in particular. Since the base of the lower part of the filter element has a flat base, the likelihood of contaminants being deposited on the underside of the lower part is reduced and furthermore, any contaminants that may have deposited can be easily removed by simply wiping them.

Since the filter parts of the filter element are still detachably connected to one another, the user of the extractor hood can separate them from one another. As a result, surfaces lying inside the filter body are also accessible and can be cleaned. If the filter parts are firmly connected to one another, however, the filter element must be cleaned in the dishwasher or in a water bath. The user cannot see whether all residues have been removed from the filter element. This is not to be feared with the filter element according to the invention with filter parts that can be detached from one another. Because the air inlet openings and air outlet openings in the filter body are formed by slots in the upper part and the lower part, the manufacture of the filter element is simplified on the one hand. In particular, the shape of a slot creates a relatively large air inlet area and air outlet area through a single opening. In addition, slots can easily be made by punching or pressing. Since the filter parts have a flat base, production is further simplified, since several slots can be made at the same time with a flat base. In addition, a filter part that has a flat base area in which at least one slot is made can be cleaned more easily than, for example, a filter layer made of mesh-shaped filter material. The offset, which according to the invention exists between the slots in the upper part and the lower part of the filter element, can finally prevent unhindered passage of contaminated air, which is also referred to as vapor, through the filter element. In the filter element according to the invention, the air is rather swirled by this offset in the filter body of the filter element and impurities are reliably separated in the interior of the filter body. The filter element is therefore also referred to below as an eddy current filter or baffle filter. With this type of filtering, a high degree of separation of impurities, in particular of low-viscosity impurities that occur, for example, when cooking Asian or Indian dishes, can be achieved.

With the filter element according to the invention, it is therefore possible, with a simple structure of the filter element, to ensure the degree of separation of the filter element in a simple manner by reliable cleaning of the filter element even after a long period of time.

The filter parts of the filter element according to the invention are preferably each formed in one piece. This means that the filter body of the filter element consists of two components. This embodiment has the advantage that the number of components of the filter element is minimized and both the production and the handling, in particular the disassembly or dismantling and cleaning of the filter element, is simplified. Compared to filter elements, in which a number of filter layers or a number of filter profiles are held in a frame and have to be aligned in this, in the preferred embodiment of the filter element, a mere merging and connecting of the lower part with the upper part or vice versa is sufficient around the To form filter body.

According to a preferred embodiment, at least one of the filter parts has at least one projection which protrudes from the respective base area. In this embodiment too, the filter parts are preferably each formed in one piece, that is to say the projection is part of the upper part or the lower part. In the context of the invention, a projection or depression is referred to as a projection which protrudes or protrudes from the base surface of the filter part upwards or downwards. The projection can be at the edge of the base area or at a distance from the edge, that is to say in the area defined by the base area. A plurality of projections are preferably provided on each of the filter parts. These are preferably at least partially aligned transversely to one another. In particular, at least one projection preferably run on a filter part in the longitudinal direction of the filter part and at least one projection in the width direction of the filter part. By providing one or more projections, the filter part with a flat base area is given a multidimensional structure. This increases the stability of the filter part. This is of particular importance in the filter element according to the invention, since the filter parts are releasably connected to one another and can be released from one another for cleaning purposes, for example. In the disassembled state, however, each filter part must still have sufficient stability that it can be washed by the user, for example, by hand or in a dishwasher. In addition, increasing the rigidity of the filter parts through projections also ensures that the distance between the filter parts remains the same in the assembled state of the filter element, that is, bending or sagging of one or both filter parts is prevented. Maintaining a defined distance is to achieve an optimal one Degree of fat separation is necessary, since the geometry inside the filter body and thus the flow inside the filter body is determined by the distance.

Furthermore, a connecting element for connecting the two filter parts to one another and / or a fastening element for fastening the filter element to the extractor hood can be provided on one or more of the projections.

According to one embodiment, the projection represents an edge strip on at least one of the filter parts. In this case, an edge strip is in particular an area bent upwards or downwards from the base along one of the edges of the base of the filter part. Since the projection is provided as an edge strip, in addition to increasing the strength, it can also delimit the space in the filter body on at least one side and thus support a targeted flow through the filter body. The edge strip is preferably designed in one piece with the base surface of the filter part, that is to say is formed with the base surface from a material, for example a sheet metal part. The edge strip is particularly preferably bent out of the plane of the base area. This bending of the edge strip can be done by edges. The edge strip is particularly preferably multi-walled, in particular double-walled. This configuration of the edge strip can be produced by flanging. Here, the free end of an edge strip bent from the base is bent by 180 ° until the free end points again in the direction of the base. By providing a multi-walled edge strip, the stability of the filter part is further increased. In addition, the risk of injury to the user is reduced, since the free end of the edge strip is usually made sharp as a result of the manufacturing process. By bending the free end of the edge strip towards the base surface, that is, by flanging the edge strip, this sharp edge faces the base surface and can no longer come into direct contact with the user.

In the embodiment in which both the upper part and the lower part of the filter body have edge strips, preferably on all four edges of the base, the dimensions of the upper part are preferably smaller than those of the lower part. In particular, the length and the width of the upper part are reduced by at least the wall thickness of the single-walled or multi-walled edge strips of the lower part. This can do that Upper part can be inserted into the lower part. The edge strips of the upper part are directed downwards and the edge strips of the lower part are directed upwards.

According to a further preferred embodiment, at least one of the projections is a bead in addition to one or more edge strips or as an alternative thereto. A groove-shaped depression or groove-shaped elevation is referred to here as a bead, which is provided in the area of the base area of the filter part, that is to say at a distance from the edge of the base area. The bead can also be referred to as an embossing. The stability of the filter part and thus also of the filter body can be further increased by the bead (s). One or more beads are preferably only provided in the upper part of the filter body. Since the upper part is not directly exposed to vapor when the filter element is installed in the extractor hood, there is no need to fear that dirt will settle on the beads. The beads are preferably provided in the upper part in such a way that, when installed, they extend downward from the base area. The resulting depression on the upper side of the upper part is not a disadvantage since this area can only be reached by air that has already been cleaned, that is, clean air that leaves the filter element. Thus, there is no need to fear that impurities will settle in this depression in the upper side of the upper part. Finally, the provision of one or more beads in at least the upper part and / or the lower part of the filter body is advantageous, since this type of projections can be easily introduced, especially in the flat base area of the filter part, so that production is not unnecessarily complicated.

The at least one bead is preferably provided transversely to the orientation of the at least one slot in the filter part. The at least one bead is particularly preferably perpendicular to the at least one slot in the base area. By introducing slots, in particular a plurality of parallel slots, into a filter part, its stability against bending in the direction perpendicular to the alignment of the slots is reduced. By introducing beads, this reduction in stability can at least be eliminated. Particularly preferably, two beads are provided in the upper part of the filter element, each lying in the vicinity of the edge of the filter part between the edge and the ends of slots which are made in the longitudinal direction.

According to a further preferred embodiment, the at least one projection is a fold on the edge of the at least one slot. In this case, a bevel is a piece of material protruding upwards or downwards from the base surface of the filter part, which is produced, for example, by deep-drawing or bending from the material of the base surface of the filter part. In addition to the further increase in stability, this embodiment has the advantage that the side of the filter part facing away from the fold does not have any sharp edges in the area of the slots, since the edges of the slots are bent in the other direction. In addition, the bevels at the edges of the slots create a flow geometry in the interior of the filter body, which leads to an improved separation of impurities from the vapor. In particular, the vapor flowing towards the lower part is conducted from the slots in the lower part through the bevels projecting upward from the base area of the lower part to the upper part. Here the vapor hits the areas of the base of the upper part between the slits made. In the upper part, too, bevels are preferably provided at the slots. These folds are directed downwards. Thus, the air that reaches the upper part through the slots in the lower part and guided through the bevels on the lower part cannot escape directly through the slots in the upper part, but has to undergo two further changes of direction before it exits through the slots in the upper part can escape the filter body. This increases the cleaning effect, in particular the effect based on the eddy current principle.

The at least one slot is preferably located in the longitudinal direction of the filter element in the at least one filter part. The length of the filter element denotes the dimension that, when the filter element is installed in the extractor hood, lies in the depth direction of the suction opening of the extractor hood. By providing the slits in this direction in the filter element, a maximum area of an air inlet opening can be provided with a small number of slits. The slots preferably extend over the greater part of the length of the filter element and only end at a distance from the longitudinal ends of the base area of the respective filter part.

According to the invention, the filter element comprises a handle. According to the invention, a device is referred to as a handle by means of which the filter element is inserted into a suction opening of a Can be introduced and removed from the extractor hood. According to the invention, the handle is additionally at least partially used according to the invention for actuating at least one fastening element which can be part of the handle and by means of which the filter element is fastened or held in the suction opening.

The handle is at least partially held between the two filter parts. This arrangement of at least part of the handle results in a number of advantages. On the one hand, the handle is at least partially protected by the lower part from the direct flow of vapor. Furthermore, fastening elements extending from the handle can protrude through a wall of the filter body and thus simultaneously serve to fasten the filter element to the extractor hood and, if necessary, at least contribute to the connection of the two filter parts of the filter body.

According to the invention, a connecting element engages the handle. The connecting element, which is used to connect the two filter parts of the filter body, is preferably a screw. As the screw engages the handle which is arranged between the two filter parts, at least one of the filter parts can be clamped to the handle by the screw. For this purpose, the screw or another suitable connecting element engages through a bore or other opening in the filter part. Particularly preferably, the connecting element, in particular the screw, protrudes upward beyond the filter body. As a result, when the filter element is used, the screw is turned away from the inflowing vapor and is protected from it by the filter element. In the state in which the filter element has been removed from the extractor hood, the connecting element, in particular the screw, can easily be operated by the user and the filter element can thus be taken apart.

According to a preferred embodiment, at least one of the filter parts comprises at least one fastening element. By providing a fastening element, which is used to fasten the filter element in the suction opening of the extractor hood, to one of the filter parts of the filter element, the number of components that make up the filter element can be further reduced. The fastening element is preferably designed in one piece with the filter part. This is particularly preferred Fastening element is a retaining tab, which is also referred to as a fastening tab and which is bent outward from one of the edge strips of the upper part. This tab can extend through a corresponding passage opening in an edge strip of the lower part and protrudes beyond an end face of the filter body. With this configuration of the fastening element, it serves both to fasten the filter element in the extractor hood and to support the connection of the filter parts of the filter body.

According to a particularly preferred embodiment, the filter body consists of an upper part and a lower part. The lower part has parallel slots introduced in the longitudinal direction with bevels at the edges of the slots, which are directed upwards. In addition, the lower part has upstanding edge strips on its edges, which are flanged at their upper end. Passage openings are provided in the edge strips of the end faces. In one edge strip, these serve for the passage of fastening tabs and in the opposite edge strip for the passage of locking pins of a handle. The upper part of the particularly preferred embodiment also has parallel slots which are introduced in the longitudinal direction and which are arranged offset in the width direction relative to the slots of the lower part. At the edges of the slots, bevels are provided which extend downward from the base of the upper part. Downwardly directed edge strips are provided on the edges of the upper part. Beads are introduced between the longitudinal ends of the slots and the front edges of the upper part. The two beads run in the width direction of the upper part. Two tabs are bent outwards on one edge strip of the upper part. The width and length of the upper part is less than the width and length of the lower part, so that it can be inserted into the lower part. Here, the inner sides of the edge strips of the lower part rest against the outer sides of the edge strips of the upper part. The height of the edge strips of the upper part is also less than the height of the edge strips of the upper part. As a result, the outer dimensions of the filter body are determined exclusively by the dimensions of the width, height and length of the lower part. The base of the upper part only limits the interior space of the filter body upwards. In an end area, a plate-shaped area is provided in the upper part and the lower part, in which no slots are provided. For this purpose, the middle slots of the upper part and the lower part are shorter than the further slots in the respective filter part. In the plate-shaped area of the In the lower part, a passage opening is made for reaching through to a handle of the filter element. In the plate-shaped area of the upper part, a bore is provided for the passage of a clamping screw as a connecting element. The handle is inserted between the upper part and the lower part in the area of the plate-shaped area. Here, a recessed grip of the handle is aligned with the access opening in the lower part. Latching pins of the handle extend in a plane parallel to the base surfaces of the upper part and the lower part of the filter body. The locking pins reach through the passage openings in the edge strip of the lower part and can be actuated, that is, retracted and extended, by actuating means in the recessed grip. A clamping screw is passed through the hole in the upper part and engages the top of the handle. As a result, the upper part is clamped and held in the plate-shaped area between the screw head and the flat upper side of the handle, which is referred to as the clamping plate. The retaining tabs on the edge strip of the upper part reach through passage openings in the edge strip of the lower part and protrude beyond the latter.

According to a further aspect, the invention relates to an extractor hood with at least one filter element. The extractor hood is characterized in that the filter element is a filter element according to the invention. Advantages and features that are described with regard to the filter element also apply - if applicable - to the filter element and vice versa.

According to a preferred embodiment, the filter element is installed horizontally in the extractor hood. In this embodiment, the advantages of the present invention can be used particularly well. In particular, fat and other liquids that are deposited inside the filter body can be absorbed in the profile formed by the bevels on the slots.

Figur 1:

eine schematische Perspektivansicht einer Ausführungsform des erfindungsgemäßen Filterelementes;

Figur 2:

eine schematische, perspektivische Draufsicht des unteren Filterteils des Filterelementes nach Figur 1 mit Griff;

Figur 3:

eine schematische, perspektivische Unteransicht der Ausführungsform des Filterelementes nach Figur 1;

Figur 4:

eine schematische Schnittansicht durch einen Teil der Ausführungsform des Filterelementes nach Figur 1 entlang der Schnittlinie A; und

Figur 5:

eine schematische Schnittansicht durch einen Teil der Ausführungsform des Filterelementes nach Figur 1 entlang der Schnittlinie B.

The present invention is described again in more detail below with reference to the accompanying drawings. Show it:

Figure 1:

a schematic perspective view of an embodiment of the filter element according to the invention;

Figure 2:

a schematic, perspective top view of the lower filter part of the filter element according to FIG Figure 1 with handle;

Figure 3:

a schematic, perspective view from below of the embodiment of the filter element according to FIG Figure 1 ;

Figure 4:

a schematic sectional view through part of the embodiment of the filter element according to Figure 1 along section line A; and

Figure 5:

a schematic sectional view through part of the embodiment of the filter element according to Figure 1 along section line B.

In Figure 1 a perspective view of an embodiment of the filter element 1 according to the invention is shown. In the embodiment shown, the filter element 1 consists of a filter body 10 with fastening devices 2 for fastening the filter element 1 to an extractor hood (not shown), a handle 4 with further fastening devices 3 and a connecting element in the form of a fixing screw 5.

The filter body 10 consists of a lower filter part 11 and an upper filter part 12. The lower filter part 11 is also referred to below as the lower part 11 and the upper filter part 12 as the upper part 12.

In Figure 2 the lower part 11 of the filter body is shown with the handle 4 provided thereon. The lower part 11 consists of a sheet metal material. The lower part 11 has a flat base surface 110 which, in the embodiment shown, has an elongated rectangular shape. In the base area 110 and thus in the lower part 11, slots 13 are made in the longitudinal direction of the lower part 11. The slots 13 extend essentially over the entire length of the lower part 11 and are only arranged at a distance from the longitudinal ends and the lateral edges of the lower part 11. In the embodiment shown, the edges of the slots 13 are formed by upwardly bent folds 14, that is to say these projections protrude upward from the base area 110 of the lower part 11. In particular, the bevels 14 form a nozzle geometry. The slots 13 can be punched or presses are introduced into the lower part 11 and at the same time the upward bevels 14 of the slots 13 are formed. The upper edges of the bent-up folds 14 of the slots 13 are deburred. In the embodiment shown, ten slots 13 are made in the lower part 11. However, it is within the scope of the invention to introduce more or less than the ten slots 13 shown in the lower part 11.

In the front area of the lower part 11, which is shown in Figure 2 is shown, a handle 4 is applied to the lower part 11 in the middle. In this area, that is to say the front central area, the lower part 11 has a passage opening (not visible) for the handle 4. The middle slots 13 have a shorter length for this purpose than the further slots 13. Thus, in the middle front area, a plate-shaped area 111 is formed from the material of the lower part 11, into which the passage opening is made and on which the handle 4 is placed.

The edges of the lower part 11 are formed by edge strips 16 which are formed by bending the material of the lower part 11 up at the edges of the base surface 110. The upstanding edge strips 16 are preferably perpendicular to the base surface 110 of the lower part 11 upwards. In addition, the edge strips 16 each extend over the entire length or width of the lower part 11. The base area 110 and the edge strips 16 of the lower part 11 thus together form a shell shape. The upper edge of the edge strips 16 is curled inwardly, that is to say towards the base surface 110, by bending over. In this case, the upper edges are preferably bent by 180 °, so that the free end of the material of the edge strip 16 is directed towards the base surface 110 of the lower part 11.

In the edge strip 16, which runs on the front edge of the lower part 11, two passages 160 are provided. Fastening elements in the form of locking pins 3 of the handle 4 reach through these passages 160. In the embodiment shown, the flanging is interrupted in this area, that is, the edge strip 16 is only single-walled in the central area.

In Figure 3 a bottom view of the filter element 1 according to the invention is shown. In this view, the underside of the lower part 11 can be seen. In this view is also the Underside of the handle 4 can be seen on which an actuating element 41 for actuating the handle 4 by the user of the extractor hood is provided in a recessed grip 40. The actuating element 41 can for example be a folding element or a sliding element. By actuating the actuating element 41 of the handle 4, the locking pins 3 are moved in the direction of the filter body 10, that is, they are retracted. If the actuating element 41 is released, the locking pins 3 move out of the filter body 10, that is, they are extended.

In the edge strip 16, which runs on the rear edge of the lower part 11, two passages 161 are also provided. Retaining tabs 2 extend through these passages 161. The retaining tabs 2 are molded onto the upper part 12 of the filter body 10. In particular, the retaining tabs 2 are formed by bending part of the material of the edge strip 16 of the upper part 12.

The structure of the upper part 12 of the filter body 10 will now be described with reference to FIG Figure 1 described. The upper part 12 consists of a sheet metal material. The upper part 12 has a flat base surface 120 which, in the embodiment shown, has a rectangular shape. In the base 120 and thus in the upper part 12 slots 13 are made in the longitudinal direction of the upper part 12. The slots 13 extend essentially over the entire length of the upper part 12 and are only arranged at a distance from the longitudinal ends and the lateral edges of the upper part 12. In the embodiment shown, the edges of the slots 13 are formed by downwardly bent bevels 14, that is to say they protrude downward from the base surface 120 of the upper part 12. In particular, the bevels 14 form a nozzle geometry. The slots 13 can be introduced into the upper part 12 by punching or pressing, and the upward-facing folds 14 of the slots 13 are formed at the same time. The lower edges of the bent-down folds 14 of the slots 13 are deburred. In the embodiment shown, ten slots 13 are made in the upper part 12. However, it is within the scope of the invention to introduce more or less than the ten slots 13 shown in the upper part 12.

In the front area of the upper part 12, a plate-shaped area 121 is formed from the material of the upper part 12 in the middle area. In the plate-shaped area 121 a bore is made for the passage for the fixing screw 5. The middle slots 13 have a shorter length than the further slots 13.

The edges of the upper part 12 are formed by edge strips 16 which are formed by bending the material of the upper part 12 down at the edges of the base surface 120. The edge strips 16 standing downwards are preferably perpendicular to the base surface 120 of the upper part 12 downwards. In addition, the edge strips 16 each extend over the entire length or width of the upper part 12. The base surface 120 and the edge strips 16 of the upper part 12 thus together form a shell shape. The lower edge of the edge strips 16 is deburred

In the edge strip 16, which runs on the front edge of the upper part 12, a recess (not shown) is provided, that is, it is interrupted in the central area. The fastening elements in the form of locking pins 3 of the handle 4 engage through this recess.

On the edge strip 16, which runs on the rear edge of the upper part 12, two retaining tabs 12 are bent outward from the material of the edge strip 16. In the assembled state of the filter element 1, these extend through the passage openings 161 in the edge strip 16 of the lower part 12 and protrude beyond the rear of the filter body 10.

The width, length and height of the upper part 12 are less than the width, length and height of the lower part 11.

In the Figures 4 and 5 are two sectional views of the embodiment of the filter element 1 according to Figure 1 shown. Figure 4 shows a section through part of the filter element along the line A, which runs in the width direction of the filter element 1. How out Figure 4 results, the slots 13 in the upper part 12 and the slots 13 in the lower part 11 are arranged offset from one another in the width direction of the filter element 1. Air flowing onto the filter element 1 from below enters the interior of the filter body 10 through the slots 13 in the lower part 11. Here, the air is guided through the bevels 14 at the slots 13 of the lower part 11. After leaving the nozzle geometry of the lower part 11 formed by the bevels 14, the air arrives on the underside of the base 120 of the upper part 12, in particular in the area of the base 120 between the slots 13 in the upper part 12. By changing direction, the air brushes down along the outside of the bevels 14 of the slots 13 of the upper part 12. As a result, the air is at least partially guided to the area of the base 111 of the lower part 11 between the slots 13 of the lower part 11. After another change of direction, the air can then leave the filter body 10 upwards via the slots 13 of the upper part 12.

How out Figure 4 results, the edge strip 16 of the lower part 11 is designed double-walled. This is brought about by flanging the material by bending the material of the base surface 110, which has been bent upwards by 90 °, downwards by 180 °. The edge strip 16 of the upper part 12 is single-walled and formed by bending the material of the base surface 120 of the upper part 12 downwards.

In the section view in Figure 5 , which lies along the section line B in the longitudinal direction of the filter element 1, the double-walled strip 16 of the lower part 11 and the single-walled edge strip 16 of the upper part 11 can also be seen. In addition, in Figure 5 a bead 5 in the upper part 12 is shown. The bead 5 is introduced at a distance from the edge of the base surface 120 and lies between the edge of the base surface 120 and the longitudinal end of the slots 13 in the upper part 12 Figure 1 results, the bead 5 extends in the width direction of the filter element 1 and thus perpendicular or transversely to the slots 13. The bead 5 is introduced over the entire width of the upper part 12 and ends at a small distance from the lateral edges of the base 120 of the upper part 12 .

Thus, projections in the form of edge strips 16, bevels 14 and beads 5 are introduced on the upper part 12. The projections in the upper part 12 all point downwards in the installed state. In the lower part projections in the form of edge strips 16 and folds 14 are introduced, which point upwards.

To assemble the filter element 1, the handle 4 is first placed on the plate-shaped area 111 of the lower part 11 and the recessed grip 40 is aligned with the access opening provided in this area 111. The handle 4 can be attached to the access opening. The locking pins 3 of the handle 4 are guided through the passage openings 160 in the front edge strip 16 of the lower part 11. The upper part 12 is applied to the lower part 11 with the handle 4 provided thereon. Because of the smaller width and length of the upper part 12, it can be inserted into the lower part 11. This state is in Figure 1 shown. When the upper part 12 is introduced into the lower part 11, the retaining tabs 2 on the rear edge strip 16 of the upper part 12 are guided through the passage openings 161 on the rear edge strip 16 of the lower part 11. The recess in the front edge strip 16 of the upper part 12 allows it to be received in the lower part 11, although the locking pins 3 of the handle 4 extend through the front edge strip 16 of the lower part 11. After the upper part 12 has been applied or introduced onto the lower part 11, the upper part 12 is fastened to the handle 4 and thus indirectly to the lower part 11 by means of the fixing screw 5. The upper part 12 is clamped in the plate-shaped area 121 between the head of the fixing screw 5 and the top of the handle 4, that is to say the clamping plate 42.

In this assembled state, the filter element 1 can be inserted into the extractor hood. For this purpose, the retaining tabs 2 are first inserted into openings provided for this purpose on the suction opening of the extractor hood. The locking pins 3 are then moved into the filter body 10 by actuating the actuating element 41. After pivoting the filter element 1 upwards into the suction opening of the extractor hood, the actuating element 41 is released and the locking pins 3 extend. These then engage in openings provided for this purpose on the suction opening of the extractor hood and the filter element 1 is fixed.

To detach the filter element 1 from the extractor hood, the steps given above are carried out in reverse order. Since the filter element 1 has filter parts 11, 12 detachably connected to one another, the user of the extractor hood can dismantle the filter element 1 for cleaning purposes after it has been removed from the extractor hood. At least the user will loosen the fixing screw 5 and separate the upper part 12 from the lower part 11. The handle 4 can remain on the lower part 11 during cleaning.

A number of advantages can be achieved with the present invention. In particular, simple cleaning of the filter element is possible. The cleaning does not have to be done in a dishwasher, but can also be done by hand. Since the filter parts of the filter element are detachably connected to one another, residues of impurities in the interior of the filter body can be recognized by the user and removed if necessary. This ensures a high separation rate of the filter element even after prolonged use. Thanks to the eddy current technology used to separate the impurities, it is also possible to achieve a high separation rate for low-viscosity impurities, such as those that occur in particular when preparing Asian or Indian dishes. Furthermore, the risk of injury to the user when cleaning the filter element is reduced to a minimum.

List of reference symbols

1

Filter element

10

Filter body

11

lower filter part

110

Floor space

111

plate-shaped area

12th

upper filter part

121

plate-shaped area

120

Floor space

13th

slot

14th

Chamfer

15th

Bead

16

Edge strips

160

Passage opening

161

Passage opening

2

Retaining tabs

3

Locking pins

4th

Handle

40

Recessed grip

41

Actuator

42

Clamping plate

5

Fixing screw

Claims (10)

1. Filter element for an extractor hood for separating impurities from steam with an at least partially air-permeable filter body (10), wherein the filter body (10) of the filter element (1) consists of a first filter part (11) with a flat base area (110) and a second filter part (12) with a flat base part (120), the filter parts (11, 12) are connected to one another in a releasable manner, at least one slot (13) is introduced into the base areas (110, 120) of the filter parts (11, 12) in each case, each slot (13) in the first filter part (11) is arranged such that it is offset in relation to each slot (13) in the second filter part (12), the filter element (1) comprises a handle (4), by means of which the filter element can be introduced into a suction opening of an extractor hood and can be removed therefrom, the handle (4) is arranged between the first filter part (11) and the second filter part (12) and is retained at least partially between the two filter parts (11, 12) and a connecting element, which serves to connect the two filter parts of the filter body, engages at the handle (4), characterised in that the handle (4) at least partially serves to activate at least one fastening element, by means of which the filter element is fastened or retained in the suction opening.
2. Filter element according to claim 1, characterised in that at least one of the filter parts (11, 12) has at least one protrusion (14, 15, 16) that projects from the respective base area (110, 120), and the filter parts (11, 12) are preferably embodied in one piece in each case.
3. Filter element according to claim 2, characterised in that at least one protrusion (14, 15, 16) represents an edge strip (16) on at least one of the filter parts (11, 12), the edge strip (16) is embodied in one piece with the base area (110, 120) of the filter part (11, 12) on which it is provided and is bent out from the plane of the base area (110, 120).
4. Filter element according to one of claims 2 or 3, characterised in that at least one protrusion (14, 15, 16) is a bead (15) in the area of the base area (110, 120) and the at least one bead (15) is preferably provided transversely to the orientation of the at least one slot (13) in the filter part (11, 12).
5. Filter element according to one of claims 2 to 4, characterised in that the at least one protrusion (14, 15, 16) is a fold (14) on the edge of the at least one slot (13).
6. Filter element according to one of claims 1 to 5, characterised in that the at least one slot (13) lies in the longitudinal direction of the filter element (1) in the at least one filter part (11, 12).
7. Filter element according to one of claims 1 to 6, characterised in that the connecting element comprises a screw (5) that particularly preferably projects upwards over the filter body (10).
8. Filter element according to one of claims 1 to 7, characterised in that at least one of the filter parts (11, 12) comprises at least the fastening element in the form of a retaining tab (2).
9. Extractor hood with at least one filter element, characterised in that the filter element represents a filter element (1) according to one of claims 1 to 8.
10. Extractor hood according to claim 9, characterised in that the at least one filter element (1) is integrated in the extractor hood in a horizontal manner.

Images