EP3133350A1 - 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 comprising at least one filter element (120, 1200, 1203). The filter unit (12) is characterized in that on the filter unit (12) in the upper side an air inlet opening (125) is formed, which serves for the inlet of air, which is sucked by the extractor device (11), that in the bottom of the Filter unit (12) an air outlet opening (126) is provided, which serves for the outlet of air from the filter unit (12) to the extractor device (11), and in the filter unit (12) at least two filter elements (120, 1200, 1203) used are arranged one above the other, at least a part of the upper filter element (1200) is designed as a collecting element (127) for collecting liquid and at least below the upper filter element (1200) at least one collecting area (122) is provided for collecting liquids. 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. The passage of the liquid takes place here in an uncontrolled manner.

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. With this grease filter insert, the drip tray can be used to hold liquids.

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 providing a filter unit in which at least two filter stages are provided and at least part of the upper filter stage forms a collecting element for collecting liquids and also a collecting area at least under the first filter stage lies.

According to a first aspect, the object is therefore achieved by a filter unit for a fume extraction device which comprises at least one filter element. The filter unit is characterized in that an air inlet opening is formed on the filter unit in the upper side, which serves for the inlet of air, which is sucked by the extractor device, that in the bottom of the filter unit, an air outlet opening is provided, which is to the outlet of air from the filter unit is used to the extractor device, and in the filter unit at least two filter elements are arranged one above the other, at least a part of the upper filter element is configured as a catch element for collecting liquid and at least one collecting area for collecting liquids at least below the upper filter element is provided.

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 upper side of the filter unit is therefore the intake side and the lower side of the filter unit is the clean air side. The upper side of the filter unit is preferably understood to be the region where 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 may preferably a fastening device for fastening the filter unit to be provided at 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 element. According to the invention, at least two filter elements, which are also referred to as filter stages, are provided in the filter unit. The filter elements may be fixed or detachable in the filter unit. The different filter elements can each have the same structure. Preferably, however, different filter elements each have a different structure.

According to the present invention, at least two filter elements are present in the filter unit. In the following, the invention will be described essentially with reference to FIG described two filter elements, the statements made here - unless otherwise stated - also apply to more than two filter elements. The filter elements can be round or square in plan view.

The filter unit has in the upper side an air inlet opening which serves for the inlet of air sucked by the extractor device into the filter unit and in the lower side an air outlet opening which 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. The air outlet opening preferably has a smaller size than the air inlet opening. The air outlet opening is located in the vertical projection of the air inlet opening on the plane of the air outlet opening completely in the air inlet opening.

The filter elements are arranged one above the other in the filter unit, that is, between the air inlet opening and the air outlet opening. The filter element arranged in the air inlet opening or provided closest to the air inlet opening is referred to herein as the upper filter element. The superimposed filter elements preferably each cover completely. This means that the area of the upper filter element corresponds to the area of the filter element (s) below. In particular, the filter elements have a size which corresponds to the size of the air inlet opening and covers the air inlet opening at the bottom.

According to the invention, at least a part of the upper filter element is designed as a collecting element for collecting liquids. In this case, a collecting element is understood to mean a one-part or preferably multi-part element which is open at the top. The collecting element, which may also be referred to as a collecting container, therefore preferably has the shape of one or more gutters or troughs which are open at the top. The collecting element preferably extends at least partially over the surface of the upper filter element.

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 may be collected in the collection area, which may consist of one of the further filter elements leak or drip. In this case, the collection area is a contour or part of the filter unit in which liquids, which originate in particular from the collecting element, are collected. The collection area is also referred to below as a collection container. The collection area can also be a filter holder by means of which the filter unit can be held on the device with extractor device, constitute 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. The filter holder is also referred to as a filter holder.

The collection area is according to the invention at least below the upper filter element. The collecting area may be in the height of the filter unit between the upper filter element and at least one lower filter element. Preferably, however, the collection area is below all filter elements of the filter unit. The collecting area lies in particular at least under the edge of the upper filter element and surrounds the air outlet opening. The collection area therefore preferably covers the annular gap which exists between the larger air inlet opening and the smaller air outlet opening.

By at least a portion of the upper filter element according to the invention forms a collecting element, the dripping or running in of liquids from above into the filter unit to the air outlet opening can be at least partially prevented. Since the collecting element is designed as part of a filter element, however, the entry of air into the filter unit can still be ensured. In addition, by providing at least one collecting area, liquid can be collected from the collecting element in an area separate from the filter element. Since the collection area is separate to the filter element, the shape and size of the collection area can be chosen freely and thus larger amounts of liquid can be absorbed. 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. In addition, by providing a plurality of superimposed filter elements, the cleaning of the air can be improved. In particular, impurities and liquids, which could not be filtered out of the air at the first, that is upper filter element, at the second or further filter element, which is located under the first filter element, to be filtered out. Thus, the complete cleaning of the air is ensured.

According to a preferred embodiment, the upper filter element lies in the air inlet opening of the filter unit. Preferably, the surface of the upper filter element completely covers the air inlet opening. By the upper filter element is located in the air inlet opening and thus at the top of the filter unit and parts of the upper filter element form a collecting element, liquids can be reliably collected already on entering the filter unit.

According to a preferred embodiment, the upper filter element consists of at least two profile sets, of which two profile sets represent facing open profiles and the profiles of the lower profile set are arranged with their open side up and form the collecting element. This embodiment of the upper filter element is also referred to as eddy current filter or baffle filter.

As profile set several mutually adjacent profiles are referred to, which lie in a plane and between which slots are formed. The profiles of a profile set can be interconnected, for example, via a frame. The profiles may have the shape of a longitudinally extending channel, which may for example have a U-shaped or V-shaped cross-section. The profile sets of the filter element are preferably aligned with each other so that at least two profile sets are offset from one another and cover the profiles of a profile set, the slots between the profiles of the second profile set. According to the invention, two or more than two profile sets may be provided in a filter element. With more than two profile sets in the filter element, the profiles of the intermediate profile sets can also be designed as planar webs. However, the lower profile set is preferably arranged so that its profiles point with their open side upwards. As a result, liquid can be collected in the profiles of the lower profile set. In the upper profile set of the filter element, the profiles are preferably arranged so that their open side is directed downwards. The edge of a profile of the upper profile set lies in a vertical projection on the profiles of the lower profile set in the surface of one of Profiles of the lower profile set. As a result, the slots in the lower profile set are covered by the upper profile set. The profile sets of the filter element are preferably parallel to each other.

By also the upper profile set of open profiles, such as U-shaped or V-shaped profiles and these are facing the lower profile set with its open side, the air entering the upper filter element can be swirled between the profile sets and thereby liquids and other impurities are deposited.

By aligning the profile sets of the upper filter element to each other also liquids that run into or from the top of the filter unit can be safely collected. The liquids are passed through the bottoms of the upper profiles to the slots formed in the upper profile set. Through these slots, the liquid then enters the upwardly open profiles of the lower profile set and can be collected there. The profiles of the lower profile set thus together form the collecting element of the filter unit according to the invention.

According to one embodiment, the lower filter element is a flat filter element. If more than two filter elements are provided in the filter unit, the upper filter element can represent an eddy-current filter and the other filter elements lying underneath planar filter elements. As a flat filter elements filter elements are referred to, in which the filter material extends over the entire surface of the filter element. The flat filter element may for example consist of expanded metal layers, braided or knitted metal threads or other filter materials. By providing at least one planar filter element in the filter unit in addition to an eddy current filter, reliable filtering out of liquids and other contaminants can be ensured.

According to one embodiment, at least the collecting element is arranged inclined from the horizontal in the filter unit. Tilted from the horizontal, an arrangement of the collecting element is designated, in which the collecting element is inclined at an angle of greater than 0 ° and less than 90 °, preferably at an angle of greater than 0 ° and less than 45 ° to the horizontal. In the embodiment with inclined Collecting element, the entire upper filter element may be inclined in the filter unit. However, it is also within the scope of the invention that only the collecting element, for example the lower profile set of an eddy current filter, is inclined to the horizontal and that or the other parts of the upper filter element, in particular the upper profile set lies in the horizontal. By the collecting element from the horizontal is inclined in the filter unit, liquid that has been caught in the collecting element can run to the lowest point of the collecting element in the collecting element and are directed from there to a collecting area.

In addition to the collecting element, it is also possible, for example, to provide the filter element or the lower filter elements, in particular planar filter elements, inclined in the filter unit from the horizontal. As a result, liquids that are deposited in these filter elements or dripping onto these can also be conducted to the lowest point and from there to a collection area of the filter unit.

According to a further embodiment, in an eddy current filter as the upper filter element, at least the profiles of the lower profile set have a curved or bent shape, through which the longitudinal ends of the profiles lie deeper in the filter unit than their further length. As a result of this configuration of the lower profile set, which forms the collecting element, liquids can run to both longitudinal ends of the profiled set and be guided from there into a collecting area.

The collecting area is preferably at least under a part of the outer edge of the upper filter element. In an inclined arranged or formed by curved profiles collecting element of the upper filter element, the collecting container is preferably at least below the lowest point of the upper filter element. Preferably, the collecting container extends over the entire edge of the upper filter element. The collecting area is preferably arranged below the upper and particularly preferably below all filter elements of the filter unit.

Preferably, an overflow edge for overflowing liquids is formed at the collecting area. By providing an overflow edge, upon penetration of a large amount of liquids into the filter unit and accumulation in the collection area, reliable discharge of the liquid to another can occur Overflow tank can be ensured. Preferably, the overflow edge is provided at the upper edge of the collection area. As a result, at first the space of the collecting area can be used for collecting 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 and preferably to all filter elements of the filter unit. Arranged as applied to the filter element is an overflow edge which is offset downwardly to the one or more filter elements. 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.

According to a preferred embodiment, the at least one filter element is held on a filter holder. The filter elements are preferably held on a common filter holder. The filter elements can be releasably connected to the filter holder. The filter holder is used in addition to holding the filter elements preferably also for fixing the filter unit to an opening of a device with extractor device. The filter holder can also be referred to as a filter housing. The filter holder can form the outside 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 inside of the outer wall of the filter holder, the filter elements are held. The filter elements may for example be placed on projections on the inside of the outer wall of the filter holder.

Preferably, the collecting area is formed in the bottom of the filter holder. In the bottom of the filter holder, an opening is provided, which is the air outlet of the Filter unit corresponds. The collecting area is therefore formed in the bottom around the air outlet opening. By forming the collecting area in the bottom of the filter holder, the structure of the filter unit is simplified since a separate collecting container need not be provided forcibly. In addition, in an embodiment in which the air outlet opening is smaller in size than the air inlet opening, the edge area of the filter elements lies above the bottom of the filter holder formed around the air outlet opening, which serves as a collecting area. This ensures the reliable supply of liquids at least from the collecting element to the collecting area.

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, can be prevented by the inventive design of the upper filter element, which forms at least partially a collecting element, and the additional provision of a collecting area in the filter unit ingress of liquids in the lying below the hob blower of a fume extractor. In addition, a reliable cleaning of the sucked air can be ensured because at least two filter elements are provided in the filter unit.

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, inadvertently entering liquids, such as overflowed food, are reliably absorbed in the filter unit and thus protected the fan of the extractor device. 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. Surrounding the collecting area is an overflow container which is arranged at least partially below the collecting area and which, in a vertical projection of the collecting area onto the overflow container, projects 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.

Preferably, the overflow container surrounds at least the part of the collecting area, on which an overflow edge is formed. This can be a reliable supply of Liquids spilling from the collection area over the overflow edge to the overflow tank are secured.

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 into the overflow container and rests on a part of the overflow container, for example, the upper edge 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 blower mounted on a bottom of a device housing of the combination apparatus, the use of the floor as an overflow tank would result in entry of the liquids collected therein into the blower and thus damage it.

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 einer weiteren Ausführungsform der erfindungsgemäßen Filtereinheit; 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 another embodiment of the filter unit according to the invention; 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 the blower 110 is indicated schematically and the air inlet opening 115 of the blower housing (s. FIG. 2 ) 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 covered by the upper filter element 1200. In FIG. 1 From the upper filter element 1200, only the upper profile set 1201 can be seen. The profiles of the profile set 1201 extend over the entire surface of the air inlet opening 125 and slots are formed between the elongate profiles.

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 in via the air inlet opening 115 axially into the blower housing 113 is output again via an air outlet opening (not shown) on the blower housing 113 in the radial direction. 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 more detail, comprises in the illustrated embodiment, a filter holder 121 and two filter elements 120th

The filter elements 120 may be configured with the filter holder 121 as a structural unit. In any case, however, the filter elements 120 and the filter holder 121 are connected to each other. In addition, the combination device 1 has an overflow container 13.

The filter holder 121 has 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-directed bends (not shown) provided on the upper edge of the outer walls 1212. The inner wall 1213 of the filter holder 121 surrounds the air outlet opening 126 of the filter unit 12 and extends upwardly from the bottom of the filter holder 121. Thus, a collecting area is formed between the outer wall 1212 of the filter holder 121 and the inner wall 1213 of the filter holder 121. The air inlet opening 125 of the filter unit 12 has a larger size than the air outlet opening 126. The distance between the edge of the air inlet opening 125 and the edge of the air outlet opening 126 is covered by the bottom of the filter holder 121.

In the filter unit 12 and in particular in the filter holder 121, two filter element 120 are provided. In particular, an upper filter element 1200 and a lower filter element 1203 are provided. The filter elements 120 each have a size that corresponds to the inner diameter of the filter holder 121.

The upper filter element 1200 is an eddy current filter in the illustrated embodiment. The upper filter element 1200 consists of an upper profile set 1201 and a lower profile set 1202. The upper profile set 1201 is formed by U-shaped long profiles, the open side is turned down. The lower profile set 1202 is formed by U-shaped long profiles, the open side is turned upwards. The lower profile set 1202 forms the catch element 127. The two profile sets 1201 and 1202 of the upper filter element 1200 can be held in a common frame (not shown). The profiles of the upper profile set 1201 are offset from the profiles of the lower profile set 1202 such that the profiles of the upper profile set 1201 cover the slots between the profiles of the lower profile set 1202.

Below the upper filter element 1200, a lower filter element 1203 is arranged. The lower filter element 1203 is in the illustrated embodiment, a flat filter element, which may for example consist of expanded metal layers and may also be referred to as a filter cartridge.

Below the lower filter element 1203 121 overflow openings 123 are introduced in the outer wall 1212 of the filter holder, through whose lower edge an overflow edge 124 is formed, can get over the liquids to the overflow tank 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, an engagement guard 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 is sucked into the blower housing 113 via the air inlet opening 115 of the blower housing 113 facing upwards and thus towards the hob 10. In this case, the air is sucked into the combination device 1 from above the hob 10 through the recess 104. In particular, the air passes through the Air inlet opening 125 of the filter unit 12 in the combination device 1 and is sucked to the air inlet opening 115 of the blower 110.

Since the upper filter unit 1200 is arranged in the air inlet opening 125, the drawn-in air flow L passes through the upper filter element 1200. The profile sets 1201 and 1202 filter out liquids and other impurities from the air and collect them in the lower profile set 1202 serving as collecting element 127. After the air has exited through the slots in the lower profile set 1202, the air passes to the lower filter element 1203 and flows through it from top to bottom. 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, deposited from the air at the filter elements 120 (1200, 1203) may, for example, run down the inside of the outer wall 1212 of the filter support 121 and be collected in the collection area 122 and not enter the blower 110th

In addition, in the filter unit 12 according to the invention liquid, which runs in through the air inlet opening 125 into the filter unit 12, via the slots of the upper profile set 1201 of the upper filter element 1200 in the upwardly facing profiles of the lower profile set 1202, which form the collecting element 127, and caught there. If a large amount of liquid enters the filter unit 12, for example during overcooking of food, first the collecting element 127 and then the collecting area 122 of the filter unit 12 fills. In the filter unit 12, in particular in the outer wall of the filter holder 121, overflow openings 123 are introduced , Over this, the liquid flows into the overflow container 13 provided around the filter unit 12.

In FIG. 4 a further embodiment of the filter unit 12 according to the invention is shown. In particular, in FIG. 4 the upper portion of the filter unit 12 shown with the filter elements 120 disposed therein. In the embodiment according to FIG. 4 is the upper profile set 1201 of the upper filter element 1200 in the horizontal. The lower profile set 1202 of the upper filter unit, however, is inclined from the horizontal. Also, the lower filter element 1203 is arranged inclined in this embodiment from the horizontal. As a result, the lowest point of the filter elements 120 is formed on the right side of the lower profile set 1202, which serves as a catch element 127, and on the right side of the lower filter element 1203. Via this lowest point, liquids can flow down from the collecting element 127 and the lower filter element 1203 on the inside of the outer wall of the filter holder 121.

In FIG. 5 a further embodiment of the filter unit 12 according to the invention is shown. In particular, in FIG. 5 the upper portion of the filter unit 12 shown with the filter elements 120 disposed therein. In the embodiment according to FIG. 5 is the upper profile set 1201 of the upper filter element 1200 in the horizontal. The lower profile set 1202 of the upper filter unit 1200, however, has a bent or angled shape. Also, the lower filter element 1203 has a bent or angled shape in this embodiment. As a result, deepest points of the filter elements 120 are respectively formed on the right and the left side of the lower profile set 1202, which serves as a collecting element 127, and on the right and left side of the lower filter element 1203. Via these lowest points, liquids can flow down from the collecting element 127 and the lower filter element 1203 on the inside of the outer wall of the filter holder 121.

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 elements, which may also be referred to as a grease filter, is preferably removable from the combination device.

According to the invention, a labyrinth of U-profiles is formed in the upper filter element through which the sucked air can flow. Grease or water can be collected in the lower U-profiles and from there into a collection area of the filter unit.

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 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 element

1201

upper profile set

1202

lower profile set

1203

lower filter element

121

filter holder

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

13

Overflow tank

130

Intervention guard

134

Port

135

bulkhead

14

device housing

140

Component shelf

18

air outlet

2

countertop

L

airflow

Claims (12)

Filter unit for a fume extraction device comprising at least one filter element (120, 1200, 1203), characterized in that on the filter unit (12) in the upper side an air inlet opening (125) is formed, which is for the intake of air from the extractor device ( 11) is used, that in the bottom of the filter unit (12) an air outlet opening (126) is provided, which serves for the outlet of air from the filter unit (12) to the extractor device (11), and in the filter unit (12 ) at least two filter elements (120, 1200, 1203) are used, which are arranged one above the other, at least a part of the upper filter element (1200) as a collecting element (127) for collecting liquid and at least below the upper filter element (1200) at least one Collection area (122) is provided for collecting liquids. Filter unit according to claim 1, characterized in that the upper filter element (1200) in the air inlet opening (125) of the filter unit (12). Filter unit according to one of claims 1 or 2, characterized in that the upper filter element (1200) consists of at least two profile sets (1201, 1202), of which two profile sets (1201, 1202) facing each other open profiles and the profiles of the lower profile set (1202) are arranged with their open side upwards and form the collecting element (127). Filter unit according to one of claims 1 to 3, characterized in that the lower filter element (1203) constitutes a flat filter element. Filter unit according to one of claims 1 to 4, characterized in that at least the collecting element (127) from the horizontal inclined in the filter unit (12) is arranged. Filter unit according to one of claims 3 to 5, characterized in that at least the profiles of the lower profile set (1202) have a curved or angled shape, through which the longitudinal ends of the profiles are deeper in the filter unit (12) than the other length. Filter unit according to one of claims 1 to 6, characterized in that the collecting area (122) lies at least under a part of the outer edge of the upper filter element (1200) and preferably that at the collecting area (122) has an overflow edge (124) for overflowing liquids is trained. Filter unit according to one of claims 1 to 7, characterized in that the at least one filter element (120) is held on a filter holder (121) and preferably the collecting area (122) in the bottom of the filter holder (121) is formed. 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 8. Combination device according to claim 9, 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 9 or 10, 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 11, characterized in that the overflow container (13) is fixedly connected to the combination device (1) and preferably that the filter unit (12) is releasably connected to the combination device (1).

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