EP3133349A1 - Filter unit for steam extractor and combination device with cooking hob and extractor device with filter unit - Google Patents

Abstract

The present invention relates to a filter unit for a fume extraction device (11) comprising at least one filter body (129) with at least one filter element (120) and at least one collection area (122) for liquids. The filter unit (12) is characterized in that the filter body (129) at least partially forms a hollow body, in the top of the filter body (129) an air inlet opening (125) is formed, which is for the inlet of air from the extractor device (11). is sucked, serves, in the bottom of the filter body (129) an air outlet opening (126) is formed, which serves for the outlet of air from the filter unit (12) to the extractor device (11), and that in the interior of the filter body (129) at least one collecting element (127) is provided for collecting liquids, which is arranged offset upwards to the underside of the filter body (129). In addition, a combination device with such a filter unit (12) will be described.

Description

The present invention relates to a filter unit for a fume extraction device and a combination device with hob and extractor device with such a filter unit.

In kitchens, it is known, instead of extractor hoods, which are arranged above a hob, for example, on the room wall or ceiling, to use so-called tray ventilators to aspirate fumes and vapors that arise during cooking. In the DE 10 2013 007 722 A1 For example, such a depression is described. In this case, a cooking steam inlet opening located in the cooking hob level is connected to a vacuum source via an exhaust air duct system. The dump ventilation is provided here as a separate device between two hobs or next to a hob. In order to prevent the ingress of liquids into the vacuum source, it is known to arrange a filter element in the drainage channel system, and to provide under the filter element a tray for catching liquids and other contaminants. A disadvantage of this known filter arrangement is that liquid entering the cooking steam inlet must pass through the filter element before it reaches the pan.

Furthermore, from the WO 2012/146237 A1 a hob with central extraction of cooking fumes down known. In this hob one or more recesses are introduced in the area around the geometric centroid. Below the hob devices are provided for the withdrawal of kitchen fumes. The devices for extracting kitchen fumes preferably represent radial fans, which are attached to the underside of a hob housing and are sucked upwards via the air from the bottom of the cooker extractor chambers. In the recess, a grease filter insert can be introduced, the side walls are permeable to cooking fumes and the bottom forms a drip tray. In this grease filter cartridge, the drip tray can indeed serve to absorb liquids, on reaching a level of the drip tray, which is greater than its height, the must Liquid is forced through the filter material to exit from the grease filter insert.

The object of the present invention is therefore to provide a solution by means of which a filter unit is suitable both for filtering impurities and liquids from fumes and vapors and for receiving or conducting larger amounts of liquid and in particular in a combination device of fume extractor and hob an optimized liquid management is ensured by continuing to clean the fumes and vapors through the filter element.

The invention is based on the finding that this object can be achieved by a filter unit is provided in which a collecting element is provided for collecting liquids, which is arranged in a filter body and between the air inlet opening and the air outlet opening of the filter body and also a Collection area is provided outside the filter body.

According to a first aspect, the object is therefore achieved by a filter unit for a fume extraction device comprising at least one filter body with at least one filter element and at least one collection area for liquids. The filter unit is characterized in that the filter body at least partially forms a hollow body, in the upper side of the filter body, an air inlet opening is formed, which serves for the inlet of air, which is sucked by the extractor device, in the bottom of the filter body an air outlet opening is formed, which is used for the outlet of air from the filter unit to the extractor device, and that in the interior of the filter body is provided at least one collecting element for collecting liquids, which is arranged offset up to the underside of the filter body.

Directional information, such as above or below, which relate to the filter unit or parts thereof, unless otherwise stated, refer to the filter unit in a built-in state, in which the filter unit in a horizontal opening of a device comprising a fume extractor, in particular is placed in a horizontal recess of a hob. The top of the filter unit therefore represents the suction side and the bottom of the filter unit the clean air side The upper side of the filter unit is preferably understood to be the area at which the filter unit rests against the opening of the device with extractor device, in particular the recess of the hob. At the top of the filter unit can preferably be provided a fastening device for fastening the filter unit to an opening of the device with extractor device, in particular a recess in a hob. The fastening device can also be referred to as a suspension device and can for example represent a fold or a bridge. It is also within the scope of the invention that the filter unit rests in the upper area only with its outer side on the inner circumference at the opening of the device with extractor device, in particular the recess of the hob and the underside of the filter unit on a component inside the device, especially rests below the hob.

The extractor device according to the invention refers to a device by means of which air and, in particular, steam and vapors produced during cooking can be extracted from a space above a hob. The extractor device has at least one fan. The fan, which may also be referred to as fan or suction fan, preferably comprises a fan housing, which is designed for example as a spiral casing or screw housing and may also be referred to as a fan housing. In the blower housing, a fan is received, which is driven by a motor also included in the blower housing. The blower housing has an air inlet opening through which sucked air can reach the fan wheel. Furthermore, the fan housing has an air outlet opening, via which air can be discharged radially. In a fan, which is a radial fan, the air inlet opening is preferably in the region of the axis of the fan wheel.

The filter unit is preferably a grease filter unit, via which fats and other impurities, in particular liquids, can be separated from the air. For this purpose, the filter unit according to the invention comprises at least one filter body with at least one filter element. The filter element can consist of expanded metal layers, braided or knitted metal threads or other filter materials. According to the present invention, one or more filter elements may be included in the filter unit. In the following, the invention will be described essentially with reference to a filter element, wherein the case made statements - unless otherwise stated - also apply to several filter elements.

As a filter body of the filter unit is understood according to the invention a contour or a component which extends at least partially over the height of the filter unit and which limits an interior space at least on two sides, preferably on all sides. The filter body may consist entirely of filter material. However, it is also possible according to the invention that the filter body comprises a frame made of an air-impermeable material, for example metal or plastic, in which the filter element or elements are introduced and held in openings. The frame may, for example, comprise a frame part extending along the upper edge of the filter body and comprising a frame part which runs along the lower edge of the filter body, which are connected to each other via vertically extending connecting webs. In addition, in the height of the filter body, a frame part may be provided which extends horizontally and is thus arranged between the top and the bottom of the filter body and may serve as a fastening device for the collecting element, for example.

The filter body may, for example, constitute a tubular filter body whose longitudinal axis lies in the height direction of the filter unit and whose lateral surface is at least partially formed by a filter element. Furthermore, it is also possible to use a filter body having a rectangular cross-section and is open at the top and bottom and in which at least one of the outer walls is formed by a filter element. The other areas of the lateral surfaces or outer surfaces are then formed by air-impermeable material.

The hollow body according to the invention is understood to mean a body which consists of an outer wall, which may also be referred to as outer surface or lateral surface, and which is open at the top and at the bottom. The hollow body may also be referred to as a pipe section or profile piece, wherein the cross section of the pipe section or profile piece may be, for example, round or polygonal, in particular quadrangular. In the hollow body according to the invention, the air inlet opening of the filter unit and in the underside of the filter body in the top of the filter body Air outlet opening of the filter unit formed. The air inlet port serves for the inlet of air sucked by the extractor device into the filter unit, and the air outlet port serves for the outlet of air from the filter unit to the extractor device. The filter unit is therefore flowed through substantially in the vertical direction.

In addition, at least one collecting element for collecting liquids is provided according to the invention. The collecting element can in particular represent a shell. The collecting element can also be referred to as a collecting container. The collecting element is arranged in the interior of the filter body and is arranged offset up to the underside of the filter body. The collecting element preferably has a size which corresponds to the cross-sectional area of the air inlet opening or is slightly larger than the cross-sectional area of the air inlet opening. The collecting element is preferably in the horizontal and thus covers the air inlet opening from the bottom.

In addition, the filter unit has a collection area for liquids. In the collecting area, in particular, according to the invention, liquids can be collected which emerge from the collecting element. In addition, liquids are collected in the collecting area, which emerge or drip down from the filter element (s). In this case, the collection area is a contour or a part of the filter unit in which liquids are collected from the filter element (s) or liquids which originate from the collecting element. The collection area is also referred to below as a collection container. The collecting area can be designed as a separate component that can be connected to the filter body. Also, to a filter holder by means of which the filter unit can be held on the device with extractor device, the collection area can represent a separate component. Preferably, however, the collecting area is configured in one piece, at least with a filter holder, that is forms part of the filter holder. Also with the filter body, in particular in the embodiment in which the filter body comprises a frame or walls of luftundurchlässigem material, the collecting area may be formed integrally with the filter body and in particular its areas which consist of luftundurchlässigem material.

By at least one collecting element in the interior of the filter body between the air inlet opening and the air outlet opening is arranged according to the invention, and the collecting element is offset to the underside of the filter body upwards, a number of advantages can be achieved. In particular, liquids dripping from above into the air inlet opening of the filter unit or trapped can be collected. In particular, when using the filter unit with a fume extraction device, the fan is arranged below the filter unit so that the air inlet opening of the blower housing is facing up, the collection of liquids is advantageous. In particular, this prevents the direct entry of liquids into the blower housing. Since the collecting element is also arranged offset upwards to the underside of the filter unit, on the one hand, a guidance of liquids in a collecting area, which preferably surrounds the filter body, can be ensured. In addition, the air flow through the filter body can be improved by the collecting element and thus the cleaning of the air. In particular, the air can flow through the filter element or the filter elements of the filter body several times and thus the cleaning of the air can be ensured. Preferably, the at least one filter body forms an upwardly and downwardly open hollow body whose cross-section is round or square.

According to a preferred embodiment, the liquid collecting element divides the filter body into an upper filter area and a lower filter area. The two filter areas differ by the direction of flow in which they are flowed through by air. According to the invention, the air inlet opening is formed in the filter unit in the upper side of the filter body. The air entering therefrom into the interior of the filter body will flow outwardly through the filter element (s), since vertical flow is prevented immediately by a blower disposed below the filter unit by the catch element. In the lower part of the air will then enter from the outside through the filter or the filter elements in the interior of the filter body and exit from there via the air outlet from the filter unit and fed to the fan.

Due to the division of the filter body into an upper filter region and a lower filter region, which are separated by the at least one collecting element, the air is therefore passed twice through filter elements of the filter body and a high Cleaning level can be ensured. In addition, the division into an upper and a lower filter region has the advantage that liquids emerging from the collecting element can flow, for example, into the filter element (s) of the lower filter region and thus the air inlet in the upper filter region is not hindered by liquids received therein, as this in the prior art is the case. In addition, a passage of the liquids through the filter elements of the filter body at the exit from the collecting element is not required, but the liquid can enter the filter element or elements and run in these, for example, down.

According to a preferred embodiment, the filter unit has a filter holder which forms the outer wall of the filter unit. The filter holder preferably has a trough or pot shape. In the bottom of the filter holder in this case an opening is introduced, which corresponds to the air outlet opening of the filter unit. The opening is preferably surrounded by inner walls of the filter holder which extend upwardly from the bottom of the filter holder. The filter holder may have a round or rectangular cross-section. About the filter holder and in particular the inner walls of the filter holder of the filter body is held. In particular, the filter body is placed on the inner wall or on the inner wall or connected thereto. The at least one filter body is therefore introduced to the outer wall offset inwardly in the filter holder.

The intermediate space between the at least one filter body and the outer wall of the filter holder preferably forms an air guide space. In this case, a space is designated as an air guide space, in which air can be conducted to the filter body and away from the filter body. The air duct is preferably closed upwards and downwards as well as outwards and the inside of the air duct is formed by a part of the filter body. Upwards, the air guide space can be closed, for example, by a cover which is applied to the filter unit around the air inlet opening. Down the air duct is preferably completed by the bottom of the filter holder. The outer wall of the filter holder finally closes the air guide to the outside.

By forming an air guide space formed around the filter body, the air from an upper portion of the filter body can be reliably guided to a lower portion of the filter body.

According to a further embodiment, the collecting element has a size that is greater in at least one surface direction than the cross-sectional area of the filter body. The supernatant of the collecting element formed thereby constitutes a drip edge for draining liquids into the collecting container.

In this embodiment, the catching element may extend through the walls of the filter body. For this purpose, one or more horizontally extending gaps can be introduced into the filter body. The over the outside of the filter body projecting portion of the collecting element can serve as a drip edge, through which the liquid can drip from the collecting element. By the drip edge is outside the filter body, the liquid dripping from it can get directly into the arranged around the filter body collecting area, which is located under the filter body. Since a lower filter area is preferably also formed apart from the upper filter area, a slot which may be required between the filter element and the collecting element to form the drip edge is not disadvantageous. Air that passes through this slot in the air duct unpurified, can be freed of impurities in the lower filter area.

The collecting region is preferably arranged below the filter body and at least partially surrounds the filter body. In particular, in vertical projection of the lower edge of the filter body lies on the collecting area, the lower edge of the filter body on the edge of the collecting area and / or outside of the filter body. By placing the collecting area under the filter body and at least partially surrounding the filter body, it is possible to ensure that liquids which run downwards in the filter element (s) are reliably collected and collected. In particular, in the structure of the filter unit according to the invention, in which this has a collecting element, which lies in the height of the filter body in the horizontal and covering the air inlet opening, the line of liquids from the one or more filter elements may be of particular importance. Namely, liquid is collected in the collecting element in an amount that is greater than the capacity of the Collecting element is, so the overflowing liquid can be introduced into the filter elements of the filter body and run down into these and so get into the collection area.

The collecting area is preferably formed by the bottom of the filter holder. By this embodiment, the structure of the filter unit is further simplified, since the filter holder performs two functions, namely the holding of the filter body and the collection of liquids and thus a collection area on a separate component is not required.

According to a preferred embodiment, the at least one filter element in the filter unit lies in a direction which is inclined to the horizontal. This embodiment has the advantage that liquids that are filtered out in the filter element due to the orientation of the filter element to run to the lower edge and from there can reliably reach the collection area. Particularly preferably, the filter element or are the filter elements in the filter unit in the vertical direction. This embodiment has the advantage that the filter surface of the filter elements lies in the vertical direction and thus can not be reached by liquids which drop from above into the filter unit via the air inlet opening. In addition, the filter area for a given size of opening in a device with a fume extractor into which the filter unit is placed can be maximized by this orientation.

According to a preferred embodiment, at least part of the upper edge of the collecting area forms an overflow edge for the overflow of liquids. By providing an overflow edge, when a large amount of liquids enter the filter unit and accumulate in the sump, reliable discharge of the liquid to another overflow container can be ensured. However, by providing the overflow edge at the upper edge of the collection area, the space of the collection area may still be used to collect liquids. Only when reaching a level that is higher than the overflow edge, the liquid will then escape from the collection area.

Preferably, the overflow edge is spaced from the at least one filter element. Arranged as spaced from the filter element is an overflow edge which is either offset downwardly from the lower edge of the filter element or which is offset horizontally from the filter element and preferably from the filter body. In the latter case, the overflow edge can be provided for example in the outer wall of the filter holder, on which the filter body is held on an inner wall. By spacing the overflow edge from the filter element, the entry of liquids exiting the collection area via the overflow edge back into the filter element can be prevented.

The overflow edge of the collecting area is preferably formed by at least one overflow opening. These overflow openings can be introduced, for example, in the outer wall of a trough-shaped filter holder, on which the filter body is held on an inner wall. The design of the overflow edge by the provision of openings has the advantage that further a connection between the collecting area and a part which lies above the overflow edge, for example the upper part of a filter holder with fastening device, is present and thus the collecting area together with the filter holder a recess of a hob can be attached and removed from this.

The filter unit according to the invention can be used for different extractor devices. In particular, however, the filter unit is used for extractor devices in which air is sucked from above into an air inlet opening. The fan is therefore preferably arranged offset down to the filter unit. The filter unit can therefore be used for example in known Muldenlüftungen.

According to a further aspect, the object is achieved by a combination device with a hob and a arranged below the hob extractor device. The combination device is characterized in that it has at least one filter unit according to the invention.

Advantages and features that have been described with regard to the filter unit apply - as far as applicable - accordingly for the combination unit and vice versa and may only be described once.

The combination device according to the invention comprises a hob and a fume extraction device. In particular, these two components of the combination device as a mounting unit, that is structural unit configured. This means that the two components of the combination device are indirectly or directly attached to each other and can be installed as a mounting unit, for example in a countertop. The combination device thus represents an assembled or preassembled unit, or a pre-assembled unit.

The hob according to the invention comprises at least one heating element and preferably a cover plate. The cover plate covers the at least one heating element from above. The heating element can represent, for example, an induction module.

The extractor device according to the invention comprises a fan and preferably in addition an air duct for guiding the air after exiting the fan from the combination device out.

The extractor device according to the invention is arranged below the hob and in particular below the top of the hob. If the upper side of the cooktop, as preferred according to the invention, is formed by a cover plate, then the extractor device is arranged below the cover plate. The fan of the extractor device may for example be arranged between two heating elements of the hob or completely offset to the heating elements down.

Directional indications, such as above and below, which are in connection with the combination device or parts thereof, refer to the combination device in the assembled and installed state, that is in the state in which this is introduced, for example, in a horizontal worktop.

By using at least one filter unit according to the invention in the combination device according to the invention, a number of advantages can be achieved. In particular, by the inventive arrangement of a collection area in the filter unit and the additional provision of a Capture element to prevent ingress of liquids in the lying below the hob blower of a fume extraction device. In addition, a reliable cleaning of the sucked air can be ensured because two filter areas are formed by the collecting element. The utilization of the filter area provided by the filter element (s) provided in the filter body can thereby be optimized.

According to one embodiment, the combination device comprises a hob with at least one recess for sucking air from the space above the hob via the at least one recess and the filter unit is inserted into at least one of the recesses from above.

According to the invention, at least one recess is provided in the hob. The recess may preferably be incorporated in the cover plate of the hob.

By according to the invention at least one recess is provided in the hob and in this a filter unit according to the invention is introduced, a number of advantages can be achieved. On the one hand, the recess (s) can be introduced into the cooking field in such a way that they lie in the vicinity of the heating elements of the hob and thereby close to the place of origin of the fumes and vapors which are to be extracted by the extractor device. In addition, in the combination device, the fan can be provided immediately below the recess and so the extraction of air from the space above the hob can be further improved. In particular, in such an arrangement of the fan, the filter unit according to the invention is advantageous. By the collecting element and the collecting area, which are provided on the filter unit so that one is inside and the other outside of the filter body, inadvertently entering liquids, such as spilled food, are reliably absorbed in the filter unit and the blower of the extractor device protected , By the filter unit is finally introduced from above into the recess of the hob, this can be removed in a simple manner, for example for cleaning purposes.

According to a preferred embodiment, the combination device comprises an overflow container which surrounds at least a part of the collection area. As the Surrounding collecting area is called an overflow container, which is at least partially disposed below the collecting area and the projecting in vertical projection of the collecting area on the overflow container at least partially beyond at least one lateral edge of the collecting area. Preferably, the overflow container is a trough, in whose bottom a passage opening is provided, which is surrounded by a protective wall. The overflow container is thus preferably formed in the lower region by at least one channel. The gutter can represent a circumferential gutter. In a filter body which is surrounded only on two sides by a collecting container, the overflow container can also be configured with only two grooves.

Preferably, the overflow container surrounds at least the part of the collecting area, on which an overflow edge is formed. As a result, a reliable supply of liquids that overflow from the collecting area via the overflow edge can be ensured to the overflow container.

The overflow container preferably represents a component configured separately from the filter unit and is fixedly connected to the combination device. The overflow container may for example be placed on the blower housing of the fan of the extractor device. Alternatively, it is also possible that the overflow container is provided on the hob, for example, the underside of the hob and where appropriate attached. The overflow container is preferably arranged in the combination device so that it is arranged above the blower of the extractor device, or at least partially surrounds it. The filter unit is releasably connected to the combination device and can be introduced, for example, in a recess of the hob and kept there detachable. However, it is also within the scope of the invention that the filter unit is introduced via the recess in the overflow container and rests on a part of the overflow container, for example, the top of a protective wall surrounding a passage opening and is held. By the overflow container is a separate component that can be introduced into the combination device, its size and position can be chosen so that a more reliable protection of the fan of the extractor device against the ingress of liquids is ensured. In a mounted on a bottom of a device housing of the combination device blower For example, using the bottom as an overflow container would result in entry of fluids collected therein into the fan and damage them.

According to one embodiment, the collecting area and the overflow container each have a channel shape. Here, the collecting area may be formed by the channel shape, while the channel shape is formed on the overflow container, for example, only in the lower region of the overflow container. The width of the channel of the overflow container is preferably greater than the width of the channel of the collecting area. Thereby, the supply of liquids from the collecting area to the overflow tank can be ensured.

Figur 1:

eine schematische Draufsicht auf eine Ausführungsform des erfindungsgemäßen Kombinationsgerätes;

Figur 2:

eine schematische Schnittansicht der Ausführungsform des erfindungsgemäßen Kombinationsgerätes entlang der Schnittlinie A - A in Figur 1;

Figur 3:

eine schematische Detailansicht der Ausführungsform der Filtereinheit aus Figur 2;

Figur 4:

eine schematische Detailansicht der Halterung des Auffangelementes der Filtereinheit aus Figur 3, und

Figur 5:

eine schematische Detailansicht einer weiteren Ausführungsform der erfindungsgemäßen Filtereinheit.

The invention will be explained in more detail below with reference to the accompanying figures. Hereby show:

FIG. 1:

a schematic plan view of an embodiment of the combination device according to the invention;

FIG. 2:

a schematic sectional view of the embodiment of the combination device according to the invention along the section line A - A in FIG. 1 ;

FIG. 3:

a schematic detail view of the embodiment of the filter unit from FIG. 2 ;

FIG. 4:

a schematic detail view of the holder of the collecting element of the filter unit FIG. 3 , and

FIG. 5:

a schematic detail view of another embodiment of the filter unit according to the invention.

In FIG. 1 is a schematic plan view of an embodiment of a combination device 1 according to the invention shown. The combination device 1 comprises a hob 10 and a fume extraction device 11, from the in FIG. 1 only that Blower 110 is indicated schematically and the air inlet opening 115 of the blower housing 113 is shown in dashed line.

The hob 10 is arranged in the upper region of the combination device 1. The hob 10 comprises in the illustrated embodiment, a cover plate 103. Below the cover plate 103 heating elements 101 are arranged. The region of the cover plate 103, in which a heating element 101 is arranged under the cover plate 103, that is, can be heated on the food to be cooked, is also referred to as a cooking zone 102 or hotplate.

As it turned out FIG. 1 results, a recess 104 is introduced in the center of the surface of the hob 10 and in particular in the cover plate 103. In the illustrated embodiment, the recess 104 has a round cross-section and lies in the center of the surface of the cover plate 103. However, it is also within the scope of the invention to introduce a rectangular recess 104 into the hob 10.

In the recess 104, a filter unit 12 is introduced, which later with reference to the Figures 2 and 3 will be described in more detail. Of the filter unit 12 is in FIG. 1 only the air inlet port 125 is shown facing down from an in FIG. 1 circular collecting element 127 is covered.

In Figures 2 and 3 is the embodiment of the combination device 1 according to the invention FIG. 1 schematically shown in sectional view. In this case, only the parts lying in the sectional plane of the combination device 1 are shown in order to improve the recognizability. The combination device 1 is introduced into an opening of a worktop 2. In FIG. 2 is the blower 110 of the extractor device 11, which is arranged below the recess 104 in the hob 10, in particular the cover plate 103 is shown. Moreover, in FIG. 2 the filter unit 12, which is arranged between the recess 104 and the blower 110, recognizable. The fan 110 includes a motor 111 that drives a fan 112. The fan 112 and the motor 111 are accommodated in a blower housing 113. The fan housing 113 has on the upwardly facing side, that is, the hob 10 side facing an air inlet opening 115. The blower 110 represents a radial fan, in which the air sucked into the blower housing 113 via the air inlet opening 115 via an air outlet opening (not shown) on the blower housing 113 in the radial direction is spent again. The air inlet opening 115 of the fan housing 113 is aligned with the recess 104 in the cover plate 103 so that the air inlet opening 115 is in the vertical projection of the recess 104 on the air inlet opening 115 completely in the surface of the recess 104.

Despite this orientation of the air inlet opening 115, this is not visible to the user in the assembled state of the combination device 1. Above the blower housing 113 namely the filter unit 12 according to the invention is arranged.

The filter unit 12, which is also in the FIG. 3 is shown in the illustrated embodiment, a filter holder 121 and a filter body 129. The filter body 129 may be configured with the filter holder 121 as a structural unit. In any case, however, the filter body 129 and the filter holder 121 are connected to each other. In addition, the combination device 1 has an overflow container 13.

In the embodiment shown, the filter body 129 constitutes a hollow body. At least one filter element 120 is held on the filter body 129. The filter surfaces of the filter element 120 extend vertically in the illustrated embodiment. The filter body 129 is held in the illustrated embodiment on a filter holder 121 having an annular trough shape. The outer walls 1212 of the filter holder 121 are attached to the upper surface of the cover plate 103. By way of example, the filter holder 121 can rest on the cover plate 103 at the edge of the recess 104 via outward-facing bends 1211 provided on the upper edge of the outer walls 1212. The outer walls of the filter holder 121 have a height that is greater than the height of the filter body 129. Thus, a collecting area 122 is formed in the lower region of the filter holder 121, which lies below the filter element 120. Specifically, the collecting portion 122 is formed by the connection of the outer wall 1212 of the filter holder 121 and the inner wall 1213 of the filter holder 121 on which the filter body 129 is held, and includes the bottom of the annular trough of the filter holder 121.

The filter body 129 represents a hollow body. In particular, in the illustrated embodiment, the lateral surfaces of the filter body 129 are formed by the filter element 120, which here has the shape of a pipe section. In the top of the filter body 129 and in the illustrated embodiment of the filter element 120, the round air inlet opening 125 of the filter unit 12 is formed. In the underside of the filter body 129 and in the illustrated embodiment of the filter element 120, the air outlet opening 126 of the filter unit 12 is formed.

In the filter body 129, a collecting element 127 is inserted between the air inlet opening 125 and the air outlet opening 126 at the center of the height. The collecting element 127 covers the entire cross-sectional area of the filter body 129. The collecting element 127 is in the FIG. 2 and 3 each a tub. The collecting element 127 can by fastening means (see FIG. 4 ) are attached to the inside of the filter body 129, for example, be placed on inwardly facing projections as fastening means. Such fastening means 1203 are in FIG. 4 indicated schematically.

On the top of the filter body 129, a cover 15 is applied. The cover 15 in this embodiment is an annular cover which covers at least the distance between the outer wall 1212 of the filter holder 121 and the upper edge of the filter body 129.

This distance is in the illustrated embodiment, since the filter body 129 is inserted into the trough-shaped filter holder 121 and there is a gap between the outer wall 1212 of the filter holder 121 and the filter body 129. This gap is also referred to as Luftleitraum 128. The bottom of the air duct 128 forms a collection area 122 for liquids. The collection area 122 is located outside the filter body 129 below it and surrounds the filter body 129.

According to the invention, the filter holder 121 can also be designed in one piece with the filter body 129. In particular, the outer walls 1212 of the filter holder 121, at which preferably bends 1211 are provided for attachment to the hob 10, the collecting area 122, which represents the bottom of the filter holder 121, and a frame in which the filter or the filter elements 120 are included as a part be formed. However, it is also possible that the filter body 129 is configured separately to the filter holder 121. In this case, the filter body 129 can be used for example in the preferably trough-shaped filter holder 121. Also in this embodiment, the filter body 129 may have a frame for the filter element 120. According to a further embodiment, however, it is also possible for the filter body 129 to be formed exclusively of the filter element (s) 120. In this case, the filter elements 120 are shaped or arranged so that they form a hollow body which is open upwards and downwards and, for example, has a round or rectangular cross section. Also in this embodiment, a collecting element 127 is introduced into the filter element 120.

In the lower region of the outer wall 1212 of the filter holder 121, one or more overflow openings 123 are introduced. The lower edge of the overflow opening 123 forms the overflow edge 124 via which liquids can reach the overflow container 13. The overflow openings 123 are introduced at a height which is in the height of the upper edge of the inner wall 1213 of the filter holder 121, or is offset to the bottom. This ensures that the height at which the overflow openings 123 are introduced above the bottom of the filter holder 121 defines the maximum filling level height of the collecting region 122.

Between the filter holder 121 and the blower housing 113, an overflow container 13 is provided in the illustrated embodiment. The overflow container 13 also has an annular trough shape. The overflow container 13 has a greater width than the filter holder 121. The filter holder 121 is accommodated in the overflow container 13 at least in its lower region in which the collecting region 122 is formed. The overflow tank 13 is arranged deeper in the combination device 1, as the filter holder 121. As a result, there is a distance between the bottom of the overflow container 13 and the collecting region 122 of the filter holder 121. At least this distance is used to hold liquids.

The filter unit 12 is detachably attached to the combination device 1. For example, the filter unit 12 can be inserted into the recess 104 and hung there. The overflow tank 13 may be detachably connected to the combination device 1. Thus, the overflow tank 13, for example, be loosely placed on the blower housing 113 or hooked into the recess. The central passage opening 134, which results from the annular shape of the overflow container 13, is aligned with the air inlet opening 115 of the fan housing 113. The passage opening 134 is surrounded by an upwardly extending protective wall 135. In the passage opening 134 of the overflow container 13, a Eingriffsschutzgitter 130 may be provided. However, it is also possible and preferred the overflow tank 13 fixed, for example, to connect to the cover plate 103 or the blower housing 113.

As an annular trough shape, which the filter holder 121 and the overflow container 13 preferably have, both a round in plan view and a quadrangular shape is understood. The shape of the filter holder 121 and the overflow container 13 are selected according to the shape of the recess 104.

In the embodiment according to FIG. 2 is also a device housing 14 of the combination device 1 is provided, in which the extractor device 11 and the hob 10 are added. In the illustrated embodiment, the heating elements 101 of the hob 10 are received in the device housing 14 and the device housing 14 is covered from above by the cover plate 103. In the device housing 14, the extractor device 11 is also provided. From the extractor device 11 is in FIG. 2 only to see the blower 110. The blower 110 is mounted on the device base 140 of the device housing 14.

As an alternative to the embodiment shown, in which the hob 10 and the extractor device 11 are accommodated in a device housing 14, it is also possible and preferred according to the invention to carry out the combination device 1 without device housing 14. In such an embodiment, for example, the top of the fan 110, for example, the side in which the air inlet opening 115 is provided, in the region which is outside the air inlet opening 115, on the underside of the hob, in particular a hob housing (not shown) may be attached ,

The function of the combination device 1 and the filter unit 12 will now be described again.

In the fan 110, the fan 112 is driven by a motor 111. As a result, air on the upward and thus the hob 10 facing air inlet opening 115 of the fan housing 113 in the fan housing 113th sucked. In this case, the air is sucked into the combination device 1 from above the hob 10 through the recess 104. Specifically, the air enters the combination apparatus 1 through the air inlet port 125 of the filter unit 12, which is a circular opening, and is drawn to the air inlet port 115 of the blower 110.

In this case, the intake air flow L passes through the filter element 120 in the upper filter region 1200 from the inside to the outside. The air thus passes into the air guide 128, which is formed between the outer wall 1212 of the filter holder 121 and the filter body 129. Due to the negative pressure generated by the blower 110, the air is sucked from the air guide 128 through the filter element 120 into the interior of the filter body 129. The air passes through the lower filter region 1201 of the filter body 129 from outside to inside and is further cleaned. From there, the air exits through the air outlet opening 126 from the filter unit 12 and passes through the air inlet opening 115 of the blower housing 113 in the blower housing 113 where it is blown through an air outlet opening (not shown) of the blower housing 113. From there, the air passes either indirectly via an outlet channel (not shown) or directly to an air outlet 18 (s. FIG. 1 From there, the air can be discharged into the environment or into the room in which the combination device 1 is operated.

Liquids, such as water and grease, which are deposited on the filter element 120 from the air may run down the filter element 120. Since the filter body 129 is held with the at least one filter element 120 on a filter holder 121 which has a collecting region 122 below the filter body 129, the liquid can be collected there and does not enter the fan 110.

In addition, in the filter unit 12 according to the invention, liquid which enters the filter body 129 via the air inlet opening 125 is collected in the collecting element 127 and collected there. If a large amount of liquid enters the filter unit 12 and the maximum fill level of the collecting element 127 is exceeded, then this liquid passing from the collecting element 127 can reach the collecting area 122 of the filter holder 121 via the lower filter area 1201 and be collected there.

In the case of particularly large quantities of liquid entering the combination device 1, for example overcooking food, first the collecting element 127 and then the collecting region 122 of the filter unit 12 are filled. In the filter unit 12, in particular in the outer wall of the filter holder 121, overflow openings are filled 123 introduced. Over this, the liquid flows into the overflow container 13 provided around the filter unit 12.

In FIG. 5 a further embodiment of the filter unit 12 according to the invention is shown. In this embodiment, a gap 1202 is inserted in the filter body 129 at its middle height. This runs horizontally. Into the gap 1202, the collecting container 127 protrudes with its opposite edges on opposite sides of the filter body 129. The width of the collecting container 127 in this embodiment is therefore greater than the width of the interior of the filter body 129. The region in which the collecting container 127 protrudes beyond the outside of the filter body 129 is also referred to as drip edge 1270. Since this drip edge 1270 is located outside the filter body 129, dripping liquid thereof can directly reach the underlying collecting area 122. As a result, it is not necessary to flow through the lower filter region 1201 with the liquid emerging from the collecting element 127.

Although the invention has been described essentially with reference to vertically extending filter elements 120, it will be understood that other filter elements 120, such as horizontally-lying or inclined filter elements, may be used.

With the present invention, a solution is provided in which the fan of the extractor device can be located directly below the recess in the hob. The recess may be rectangular or round. The filter unit with the filter element, which may also be referred to as a grease filter, is preferably removable from the combination device.

According to the invention, a collecting element is provided in the interior of the filter body. By the collecting element can be collected for a liquid and the Others create a labyrinth in the filter unit through which the air filter elements pass twice.

Preferably, a collection area for liquids, which may also be referred to as a liquid container, is provided. In this collection area, grease or water that spills over the catcher can be trapped and collected. In addition, according to the invention, an overflow container can be provided into which liquid can flow out of the collecting area. The overflow container is preferably fixedly mounted in the combination device and is therefore also referred to as a static container. Although the static container can not be removed preferably, but can be cleaned by hand or emptied from below, through an opening.

The filter element, the catcher element and the collection area can be a single unit.

The present invention has a number of advantages. In particular, due to the possible with the filter unit according to the invention possible positioning of the fan under the recess and the orientation of the air inlet opening upwards, possibly only one fan is required. This fan can be larger, rotate slower and thus produce less noise. In addition, the blower can be protected by the filter unit and optionally an overflow container.

REFERENCE NUMBERS

1

combination device

10

hob

101

heating element

102

cooking zone

103

cover plate

104

recess

11

Exhaust hood

110

fan

111

engine

112

fan

113

fan housing

115

Air inlet opening

12

filter unit

120

filter element

1200

Upper filter area

1201

lower filter area

1202

gap

1203

fastener

121

filter holder

1211

fold

1212

outer wall

1213

inner wall

122

collecting area

123

Overflow opening

124

Overflow edge

125

Air inlet opening

126

air outlet

127

collecting element

1270

drip

128

air conduit

129

filter body

13

Overflow tank

130

Intervention guard

134

Port

135

bulkhead

14

device housing

140

Component shelf

15

cover

18

air outlet

2

countertop

L

airflow

Claims (13)

Filter unit for a fume extraction device (11) comprising at least one filter body (129) with at least one filter element (120) and at least one collecting area (122) for liquids, characterized in that the filter body (129) at least partially forms a hollow body, in the An upper side of the filter body (129) an air inlet opening (125) is formed, which serves for the inlet of air, which is sucked by the extractor device (11), in the bottom of the filter body (129) an air outlet opening (126) is formed, which Outlet of air from the filter unit (12) to the extractor device (11) is used, and that in the interior of the filter body (129) at least one collecting element (127) is provided for collecting liquids, to the bottom of the filter body (129) after is arranged offset above. Filter unit according to claim 1, characterized in that by the collecting element (127) for liquids, the filter body (129) is divided into an upper filter region (1200) and a lower filter region (1201). Filter unit according to claim 1 or 2, characterized in that the filter unit (12) has a filter holder (121) which forms at least the outer wall (1212) of the filter unit (12) and the at least one filter body (129) to the outer wall (1212). offset inwardly in the filter holder (121) is introduced and the space between the at least one filter body (129) and the outer wall (1212) of the filter holder (121) forms a Luftleitraum (128). Filter unit according to one of claims 1 to 3, characterized in that the collecting element (127) has a size which is greater in at least one surface direction than the cross-sectional area of the filter body (129) and the supernatant of the collecting element (127) formed thereby a drip edge to Dropping of liquids into the collection area (122) represents. Filter unit according to one of claims 1 to 4, characterized in that the collecting region (122) is arranged below the filter body (129) and at least partially surrounds the filter body (129), in particular in vertical projection of the lower edge of the filter body (129) onto the collecting region ( 122), the lower edge of the filter body (129) on the edge of the collecting area (122) and / or outside of the filter body (129). Filter unit according to one of claims 3 to 5, characterized in that the collecting area (122) is formed by the bottom of the Luftleitraumes (128). Filter unit according to one of claims 1 to 6, characterized in that the at least one filter element (120) in the filter unit (12) lies in a direction which is inclined to the horizontal, and preferably in that the filter element (120) in the filter unit (12) lies in the vertical direction. Filter unit according to one of claims 1 to 7, characterized in that the at least one filter body (129) forms an upwardly and downwardly open hollow body whose cross-section is round or square. Filter unit according to one of claims 1 to 8, characterized in that at least a part of the upper edge of the collecting area (122) forms an overflow edge (124) for the overflow of liquids and the overflow edge (124) to the at least one filter element (120) spaced is. Combination device with a hob (10) and a arranged below the hob extractor device (11), characterized in that it comprises at least one filter unit (12) according to one of claims 1 to 9. Combination device according to claim 10, characterized in that the combination device (1) comprises a hob (10) with at least one recess (104) for sucking air from the space above the hob (10) via the at least one recess (104) and the Filter unit (12) is inserted into at least one of the recesses (104) from above. Combination device according to one of claims 10 or 11, characterized in that the combination device (1) comprises an overflow container (13) which surrounds at least a part of the collecting area (122), preferably at least the part of the collecting area (122), at which an overflow edge (124) is formed surrounds. Combination device according to claim 12, characterized in that the overflow container (13) is fixedly connected to the combination device (1) and preferably that the filter unit (12) is detachably connected to the combination device (1).

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