EP4390236A1

EP4390236A1 - Extraction device

Info

Publication number: EP4390236A1
Application number: EP22215860.2A
Authority: EP
Inventors: Stefan Bayerlein; Björn Leyh; Eduardo PUOTI; Valerio PALLANTE
Original assignee: Electrolux Appliances AB
Current assignee: Electrolux Appliances AB
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2024-06-26
Also published as: AU2023411913A1; WO2024132604A1

Abstract

The present invention is related to an extraction device (14) for removing air from an area above a cooking hob (12). The extraction device (14) comprises an inlet opening (24) for an intake of the air into an interior of the extraction device (14), a cover element (26), which is arranged at the inlet opening (24), and at least one alignment means (60, 60', 72). According to the invention, the alignment means (60, 60', 72) comprises at least a first component for centring the cover element (26) with the inlet opening (24), wherein the at least first component is arranged, continuously or discontinuously, at or next to a rim or edge of the inlet opening (24) and/or a rim or edge of the cover element (26).

Description

The present invention relates to an extraction device comprising an inlet opening, a cover element and at least one alignment means according to the preamble of claim 1. The present invention further relates to a combination appliance according to claim 15.
During the performance of cooking activities under use of a cooking hob, kitchen vapours are generated, which are distributed over the cooking area. In order to avoid these kitchen vapours to be spread throughout the entire kitchen space, an arrangement of an extraction device, particularly an extractor hood, is common. Said extraction device is operated in parallel to the cooking hob, thereby sucking in those kitchen vapours in order to filter out particles and tiny droplets from the vapours and/or to blow the vapours to the outside of the building. While it has been common to arrange such an extractor hood above the cooking area, in recent years downdraft extraction devices have been finding a growing market. Such kind of extraction device is usually arranged below a worktop of the related cooking hob, and it comprises at least one fan for sucking air from the cooking area through an opening or recess arranged in the worktop.
Such a downdraft extraction device further comprises a cover element arranged at the inlet opening or recess of the extraction device. It is known, that the arrangement of the cover element at the inlet opening or recess is guided by an alignment means. Such alignment means is specifically the interaction between an outer circumferential edge of the cover element and an inner edge of the inlet opening or recess. Due to tolerances in production line, the arrangement of the cover element at the inlet opening or recess is not free of play and this may cause vibration noises, particularly when the extraction device extracts cooking fumes from induction cooking hobs and the inlet opening is included in a cut-out of a cooking plate of said induction cooking hob.
It is an object of the present invention to provide an extraction device, with an improved arrangement of the cover element at the inlet opening or recess, such that vibration noises, specifically during the operation of a cooking process, are limited or even avoided. A further object of the present invention is to improve the overall aesthetic design of the surface of the cooking hob.
The object is achieved for an extraction device according to the preamble of claim 1 by the features of the characterizing part of claim 1. Advantageous embodiments of the extraction device according to the present invention are defined by the dependent claims.
An extraction device for removing air from an area above a cooking hob comprises an inlet opening for an intake of the air into an interior of the extraction device, a cover element, which is arranged at the inlet opening, and at least one alignment means. According to the present invention, the alignment means comprises at least a first component for centring the cover element with the inlet opening, wherein the at least first component is arranged, continuously or discontinuously, at or next to a rim or edge of the inlet opening and/or a rim or edge of the cover element.
The term "centring with" may be understood, that there is an alignment of the cover element with the inlet opening, so that the gap distance between the cover element and the inlet opening is circumferentially the same.
The air removed is particularly heated air and the air may comprise cooking vapours. The extraction device is particularly an extraction hood for the extraction of cooking vapours. The extraction device is preferably configured to form a combination appliance in combination with the cooking hob, the extraction device specifically being arranged below the cooking hob. The inlet opening or recess is preferably positioned at a central position of the cooking hob, and may be designed in a round or rectangular or square shape.
The cover element is preferably partially or completely covering the inlet opening or recess, and the shape of the cover element may be complementary to the shape of the inlet opening or recess. The cover element is preferably a lid or a grid.
Preferably, the alignment means is configured to guide the placement of the cover element in at least two different directions, preferably in relation to a reference plane of a top surface of the cooking hob, wherein a first direction is orthogonal to a second direction, and wherein preferably the alignment means is configured to guide the placement of the cover element additionally in a third direction, with the third direction specifically providing for a flush installation of the top surface of the cover element with the top surface of the cooking hob. Said flush installation provides for an aesthetical design of the cooking hob by conferring a smooth top surface.
The third direction is preferably related to a translational movement, which the cover element may perform, preferably orthogonally to a reference of the cooking hob and/or the top surface of the cooking hob.
Moreover, the alignment means may comprise at least one bevelled edge or inclined surface, preferably a chamfer, wherein the at least one bevelled edge or inclined surface is configured for guiding the insertion of the cover element in the inlet opening, at least in one direction.
The bevelled edge or inclined surface is specifically arranged to facilitate the insertion of the cover element in the inlet opening or recess.
According to a further embodiment of the invention, the first component comprises two elevations, which enclose a groove or a recess, wherein the at least one bevelled edge or inclined surface is preferably arranged between the two elevations, in particular at the groove or the recess. By means of said elevations lateral movements of the cover element are limited. Moreover, at least one of the elevations may be chamfered, so that such lateral movements of the cover element are completely stopped, at least when the cover element is arranged in its resting position.
Additionally, the alignment means comprises a second component for centring the cover element with the inlet opening, wherein the second component is arranged, continuously or discontinuously, at or next to the rim or edge of the inlet opening and/or at the rim or edge of the cover element, and/or at a distance from the first component.
Preferably the second component has similar or the same characteristics, such as shape and/or function, as the first component. The second component provides further stabilization of the cover element arranged at the inlet opening or recess.
In some implementations, the alignment means comprises a third component, which preferably is or comprises a tongue or a protrusion element, for centring the cover element with the inlet opening, wherein the first component and/or the second component is arranged at or next to the rim or edge of the inlet opening, and wherein the third component is arranged, continuously or discontinuously, at or next to the rim or edge of the cover element. As an alternative, the first component and/or the second component is arranged at or next to the rim or edge of the cover element, and the third component is arranged, continuously or discontinuously, at or next to the rim or edge of the inlet opening. The third component further improves the alignment of the cover element arranged at the inlet opening or recess.
In particular, the third component is configured to be inserted into the groove or recess by sliding along the at least one bevelled edge or inclined surface between the two elevations, thereby promoting a targeted insertion of the cover element.
Additionally, the third component may be configured to adjust the installation height of the cover element within the inlet opening, preferably by adjusting the top surface of the cover element flush with the top surface of the cooking hob, so that the third component assures a smooth design and/or working surface of the cooking hob.
A particularly specific embodiment is characterized in that the first component or the second component or the third component is arranged at the rim or edge of the cover element and comprises at least one lateral tongue or protrusion configured for being inserted in a groove or a recess of the rim or edge of the inlet opening, or in that the first component or the second component or the third component is arranged at the rim or edge of the inlet opening and comprises at least one lateral tongue or protrusion configured for being inserted in a groove or a recess of the rim or edge of the cover element.
As an alternative, the first component or the second component or the third component is arranged at the rim or edge of the cover element and comprises at least one lateral groove or recess configured for receiving a lateral edge of a tongue or protrusion of the rim or edge of the inlet opening.
Another possibility may be characterized in that the first component or the second component or the third component is arranged at the rim or edge of the inlet opening and comprises at least one lateral groove or recess configured for receiving a lateral edge of a tongue or protrusion of the rim or edge of the cover element.
According to the three alternatives described above, said tongue or protrusion interacts with the groove or recess, which may improve the alignment of the cover element.
Preferably, the first component and/or the second component and/or the third component is or are configured to guide the installation of the cover element into the inlet opening in such a way that a misplacement of the cover element is prevented.
In particular, the first component, the second component and the third component have each different shapes, which assure the placement of the cover element at the inlet opening or recess in a particular orientation.
A preferred embodiment of the invention provides that the first component and/or the second component and/or the third component is made of an elastic material, preferably made of rubber, wherein the elastic material is deformable in at least one direction. The elastic material confers flexibility in the manufacturing of the size of the cover element and/or the size of the inlet opening or recess.
More specifically, the elastic material of the first component and/or the second component and/or the third component is configured for providing an exact positioning of the cover element in or in relation to the inlet opening, by centring the cover element in at least one direction, preferably in relation to a reference plane of a top surface of the cooking hob, and wherein the top surface of the cover element is in particular flush with the top surface of the cooking hob.
The elastic material assures the arrangement of the cover element at the inlet opening or recess free of play, which therefore reduces vibration noises.
Particularly such flexible design of at least one of the first, the second and third component can be set against the aspect of tolerances, i. e. it can compensate any tolerances of the cover element or the inlet opening or recess. More specifically, with such flexible design of at least one of the first, second and third components a larger dimensioning of these components is enabled, wherein due to the elastic material the respective component specifically gives way to an adjacent element, e.g. by an offset movement, during the insertion of the cover element.
A specific embodiment of the present invention is characterized in that the first component of the alignment means of the extraction device comprises at least one bevelled edge or inclined surface, wherein the first component and the second component are arranged at the rim or edge of the inlet opening, and the third component is arranged at the rim or edge of the cover element, wherein the first component and/or the second component and/or the third component is made of elastic material, wherein the alignment means is configured to centre the cover element with the inlet opening for providing an exact positioning of the cover element in relation to the inlet opening, wherein the top surface of the cover element is preferably flush with the top surface of the cooking hob.
The flush installation is particularly determined by the height and thickness of the third component and/or the thickness of the cover element. This embodiment and/or constellation improves the aesthetic of the cooking hob and reduces the vibration noises.
The object is achieved for a combination appliance according to the combination of features of claim 15.
According to a further aspect of the present invention, a combination appliance is provided, which comprises a cooking hob with at least one cooking zone and an extraction device as herein disclosed.
The previously described examples and features of the present invention can be combined with each other in any way.
Further or other details and advantageous effects of the present invention are described in more detail below with reference to the attached figures, in which

Fig. 1: is a perspective view of a general setup of a combination appliance comprising a cooking hob and a downdraft extraction device installed in a kitchen cabinet, wherein the combination appliance is structured according to a first example;
Fig. 2: is a cross-sectional perspective view of the disassembled combination appliance of Fig. 1 with a frontal surface cut away;
Fig. 3: is a perspective view of air channel carrier defining an inlet opening of the downdraft extraction device showing a first alignment guide;
Fig. 4: is a top view of the air channel carrier of Fig. 3 showing the first alignment guide and a second alignment guide;
Fig. 5: is an enlarged detail view of detail V of the air channel carrier, as indicated in Fig. 3;
Fig. 6: is a perspective top view of a cover grid covering the inlet opening defined by the air channel carrier according to Figs. 3 to 5;
Fig. 7: is a perspective bottom view of the cover grid of Fig. 6 showing eight positioning means arranged at the bottom side of the cover grid; and
Fig. 8: is the top view of Fig. 4, but with indication of the arrangement of the positioning means, when the cover grid is arranged in the inlet opening.

In all figures the same or equivalent part are marked with the same reference numbers.
Fig. 1 illustrates a general setup of a combination appliance 10 comprising a cooking hob 12 and a downdraft extraction device 14 installed in a kitchen cabinet 16. The combination appliance 10 illustrated in Figs. 1 and 2 presents a structure of a combination appliance 10 according to a first example. In general, and as shown in Fig. 1, the combination appliance 10 is implemented in a cut-out of a kitchen countertop 18 forming a top cover plate of the kitchen cabinet 16. The downdraft extraction device 14 is configured to take away cooking vapours occurring during cooking processes, in particular when cooking with uncovered cookware. The cooking hob 12 comprises cooking regions 20a, 20b arranged on a left half and a right half of a cooktop 22 of the cooking hob 12, which left and right halves are separated from each other by an inlet opening 24 for an intake of the cooking vapours, the inlet opening 24 being arranged alongside a cooktop centreline. The inlet opening 24 is covered by a cover grid 26 for preventing items, e. g. cookware, to fall into the inlet opening 24. Instead of the cover grid 26 a lid may be used for entirely covering the inlet opening 24 when the extraction device 14 is out of use, but for the operation of the extraction device 14 the lid is pivotable into an upright open position.
A housing 28 of the extraction device 14 is shown in Fig. 1 in transparent illustration. Said housing 28 provides a closed outer shell or first channel segment for a flow of the sucked-in cooking vapours on their way from the inlet opening 24 to an exhaust opening 30 in a base area 32 of the kitchen cabinet 16. Said exhaust opening 30 is also covered, namely by an outlet grille 34.
The flow of the sucked-in cooking vapours through the extraction device 14 is driven by the operation of an extraction fan 36 arranged inside of the housing 28. Said extraction fan 36 comprises a bottom-sided intake opening 38 for sucking the cooking vapours from the interior space of the housing 28.
A rear-sided fan outlet is arranged for a horizontal exit of the air blown out backwards from the extraction fan housing 42. The fan outlet is connected to a first end of an air duct 44 designed as a rectangular tube and forms a second channel arranged downstream the above-mentioned first channel segment. Directly at the passage from the fan outlet to the air duct 44, an air duct bending by 90 degrees is implemented, which redirects the air flow from horizontal to vertical downwards. The air duct 44 may be guided alongside a rear side of the kitchen cabinet 16 and may be bent again by 90 degrees close to a rear lower edge of the kitchen cabinet 16 in order to direct the airflow towards exhaust opening 30 in the base area 32 of the kitchen cabinet 16. Accordingly, the second end of the air duct 44 is connected to the exhaust opening 30. The embodiment illustrated in Fig. 1 shows a solution of the air duct 44 with an inclined section of its downwardly directed portion, directed slightly to the right. Naturally, a solution with said portion arranged in an exact vertical direction is considerable as well.
The course of the cooking vapours from the cooking area through the extraction device 14 to a re-entry into ambient air is illustrated in Fig. 1 by dotted arrows 46¹ to 46⁵. On their way through the extraction device 14, the cooking vapours pass through a filter assembly 48, which is arranged downstream directly behind the inlet opening 24 for providing a purification of the conveyed air. Said filter assembly 48 includes a filter carrier 50 supporting a filter element (not shown) that is usually configured for filtering out grease particles and droplets.
The cross-sectional view of Fig. 2 further shows two power boards 54, one for the left cooking region 20a and one for the right cooking region 20b, the power boards 54 providing cooking zones in the left and right cooking regions 20a, 20b with electrical power. In the present embodiment, the cooking hob 12 is an induction cooking hob and the cooking zones are defined by induction coils (not shown) that are arranged below the cooktop 22 of the cooking hob 12. Attached to the bottom side of the power board 54 assigned to the right cooking region 20b, a further circuit board is arranged forming a control electronics 56 for the combination appliance 10.
In order to provide the user of the combination appliance 10 with a condition for a facilitated insertion of the cover grid 26 in the inlet opening 24, and for safeguarding a nice overall aesthetic design by a particularly well positioned cover grid 26 within the inlet opening 24, said cover grid 26 is configured to be arranged in a centred alignment with the inlet opening 24, with the result of uniform circumferential gap distances. To this end, alignment means are included in the area of the inlet opening 24 of the combination appliance 10.
Fig. 3 illustrates an air channel carrier 58 isolated from the extraction device 14, which air channel carrier 58 defines the inlet opening 24 of the extraction device 14. More specifically, the air channel carrier 58 is formed as a frame enclosing the inlet opening 24. In its fitted state, the air channel carrier 58 is configured to be implemented in a cut-out of the cooktop 22, particularly made of glass-ceramics material, of the cooking hob 12, therein interacting with or forming a part of the previously described first channel segment. The perspective illustration according to Fig. 3 shows a first alignment guide 60 in a first corner of the rectangular inlet opening 24, wherein the first alignment guide 60 is positioned on a terrace-shaped load-bearing step 62 configured for supporting a first shorter lateral edge of the cover grid 26. As is shown by the top view of the air channel carrier 58 according to Fig. 4, the air channel carrier 58 further comprises a second alignment guide 60' in a second corner of the rectangular inlet opening 24, which first and second corners are arranged diagonally opposite each other. Also the second alignment guide 60' is positioned on a terrace-shaped load-bearing step 62' configured for supporting the second shorter lateral edge of the cover grid 26. With said supporting of the cover grid 26 at its two shorter lateral edges, the cover grid 26 is entirely supported within the inlet opening 24, wherein the different dimensions of both cover grid 26 and air channel carrier 58 are defined in such a way that the top side of the cover grid 26 is flush with the top side of the cooktop 22.
Fig. 5 illustrates an enlarged detail view of the air channel carrier 58, as indicated by "V" in Fig. 3. With such enlarged illustration, the constructive design of the first alignment guide 60, which correlates with the second alignment guide 60', will be explained hereafter. Even though shown in more detail only for the first alignment guide 60, both first and second alignment guides 60, 60' comprise a first elevation 64a and a second elevation 64b, which are arranged on the load-bearing step 62. Particularly in the case of the air channel carrier 58 being made of a plastic material, the first and second elevations 64a, 64b may be formed in one piece, e. g. by injection moulding, with the load-bearing step 62. While the second elevation 64b is directly placed in the corner of the inlet opening 24, the first elevation 64a is positioned with a distance to the second elevation 64b, moved towards the central point of the load-bearing step 62. By positioning the first elevation 64a with a distance to the second elevation 64b, a recess 66 is interposed therebetween. Said recess 66 is determined to receive a mating piece arranged at the cover grid 26, which mating piece will be explained in more detail further down below. The recess 66 is designed by being enclosed on three sides, namely laterally by respective side walls 70a, 70b of the first and second elevations 64a, 64b, and on the rear side by a section of the inner wall 58a of the air channel carrier 58 or, as shown in Fig. 5, by a front wall 68 attached to said section of the inner wall 58a. The dimensioning of the front wall 68 defines the gap distance between the cover grid 26 and the inlet opening 24 in interaction with the respective dimensions of the afore-mentioned mating piece.
In particular embodiments, not shown in Fig. 5, at least one of the side walls of the first and second elevations 64a, 64b and/or said front wall 68 may comprise an inclined surface, which may be formed as a chamfer. Said at least one inclined surface or chamfer may be adapted to facilitate the insertion of the cover grid 26, hence forming an insertion aid. Preferably, an all-sided chamfering is provided.
As indicated, the centring of the cover element with the inlet opening is provided, on the one hand, by an interaction between the first and second alignment guides 60, 60', more specifically by the recesses 66 arranged between the first and second elevations 64a, 64b of each one of the first and second alignment guides 60, 60', and, on the other hand, an allocated mating piece arranged at the cover grid 26 for each one of the first and second alignment guides 60, 60'.
Referring now to Figs. 6 to 8, said mating piece is formed by a foot element 72 resting on the load-bearing step 62, in that carrying the cover grid 26 when arranged within the inlet opening 24. For a stationary arrangement, the cover grid 26 illustrated by Fig. 7, includes four foot elements 72, which are arranged in pairs at the two opposing shorter lateral edges of the cover grid 26, therein resting in pairs on the two opposing load-bearing steps 62, 62', as is illustrated in dotted lines in Fig. 8, which indicates the arrangement of the foot elements 72 on the load-bearing steps 62, 62', when the cover grid 26 is arranged in the inlet opening 24, however, for a better illustration of the bearing or resting situation, without showing the cover grid 26 itself. More specifically, the plane of positioning of the foot elements 72 is indicated by dotted line L in Fig. 3.
Moreover, two diagonally arranged foot elements 72 are not only provided for operating as bearing or resting means, but they are also working as centring aids, in that matching and interacting with the first and second alignment guides 60, 60', which are allocated to these two diagonally arranged foot elements 72 and which, as previously explained, are therefore arranged diagonally opposite each other in the same way as the two foot elements 72. Said matching or interaction of foot elements 72 and first and second alignment guides 60, 60' is specifically proved by means of tongues or protrusions 76, which laterally protrude from the two shorter lateral edges of the cover grid 26.
The cover grid 26 further comprises four spacers 74, which are arranged at the two opposing longer lateral edges of the cover grid 26, which spacers 74 are also illustrated in dotted lines in Fig. 8. In the same way as the foot elements 72, also the spacers 74 are positioned on the bottom side of the cover grid 26, and they also comprise tongues or protrusions 76, which laterally protrude from the two longer lateral edges of the cover grid 26. In specific embodiments, the spacers 74, more specifically, the tongues or protrusions 76 of the spacers 74, interact with assigned inclined surfaces, particularly chamfers, arranged at the rim or edges of the inlet opening 24. By means of said tongues or protrusions 76, in particular with further support provided by assigned inclined surfaces, an alignment of the cover grid 26 in relation to the inlet opening 24 is established.
Advantageously, the foot elements 72 and/or the spacers 74 are made of an elastic material, preferably rubber or silicone. By interaction with the rim or edges of the inlet opening 24, in particular with inclined surfaces at the rim or edges of the inlet opening 24, a centred positioning of the cover grid 26 can be arranged.
Finally, in contrast to the illustrated cover grid 26, which has a rotationally symmetric shape, and the illustrated air channel carrier, the extraction device 14 as disclosed herein may also include means for avoiding misplacement of the cover grid 26. Such a misplacement, specifically a placement rotated by 180 degrees, may be disadvantageous if a specifically guided air inlet shall be provided by means of the cover grid 26, may be avoided e. g. with the first and second alignment guides 60, 60', and having different shapes, which assure in interaction with respective designs of the assigned foot elements 72 a placement of the cover grid 26 at the inlet opening 24 in a particular orientation.
Although illustrative embodiments of the present invention have been described herein with reference to the accompanying drawings, it is to be understood that the present invention is not limited to these precise embodiments, and that various other changes and modifications may be affected therein by one skilled in the art without departing from the scope or spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as defined by the appended claims.

List of reference numerals

10: combination appliance
12: cooking hob
12': hob assembly
14: downdraft extraction device
16: kitchen cabinet
18: kitchen countertop
20a,20b: cooking regions
22: cooktop
24: inlet opening
26: cover grid
28: extraction device housing
30: exhaust opening
32: base area
34: outlet grille
36: extraction fan
38: intake opening
42: fan housing
44: air duct
461 to 5: arrows indicating air flow
48: filter assembly
50: filter carrier
54: power boards
56: control electronics
58: air channel carrier
58a: inner wall of air channel carrier
60,60': alignment guides
62,62': load-bearing step
64a,b: first and second elevations
66: recess
68: front wall
70a,70b: side walls
72: foot elements
74: spacers
76: protrusion
L: dotted line

Claims

An extraction device (14) for removing air from an area above a cooking hob (12), preferably a downdraft extraction device (14) or an extraction hood, the extraction device (14) particularly being arranged or arrangeable below the cooking hob (12), wherein the extraction device (14) comprises
- an inlet opening (24) for an intake of the air into an interior of the extraction device (14),

- a cover element (26), wherein the cover element (26) is arranged at the inlet opening (24), and is preferably partially or completely covering the inlet opening (24),

- at least one alignment means (60, 60', 72), characterized in that
the alignment means (60, 60', 72) comprises at least a first component for centring the cover element (26) with the inlet opening (24), wherein the at least first component is arranged, continuously or discontinuously, at or next to

- a rim or edge of the inlet opening (24)
and/or

- a rim or edge of the cover element (26).
The extraction device (14) according to claim 1,
characterized in that
the alignment means (60, 60', 72) is configured to guide the placement of the cover element (26) in at least a first direction and a second direction, preferably in relation to a reference plane of a top surface of the cooking hob (12), wherein the first direction is orthogonal to the second direction, and wherein preferably the alignment means (60, 60', 72) is configured to guide or to define the placement of the cover element (26) additionally in a third direction, with the third direction providing for a flush installation of the top surface of the cover element (26) with the top surface of the cooking hob (12).
The extraction device (14) according to any one of the preceding claims,
characterized in that
the alignment means (60, 60', 72) comprises at least one bevelled edge or inclined surface, preferably a chamfer, wherein the at least one bevelled edge or inclined surface is configured for guiding the insertion of the cover element (26) in the inlet opening (24), at least in one direction.
The extraction device (14) according to any one of the preceding claims,
characterized in that
the first component (60) comprises two elevations (64a, 64b), which enclose or border a groove or a recess (66), wherein the at least one bevelled edge or inclined surface is preferably arranged between the two elevations (64a, 64b), in particular at the groove or the recess (66).
The extraction device (14) according to any one of the preceding claims,
characterized in that
the alignment means (60, 60', 72) comprises a second component (60') for centring the cover element (26) with the inlet opening (24), wherein the second component (60') is arranged, continuously or discontinuously, at or next to the rim or edge of the inlet opening (24) and/or at the rim or edge of the cover element (26), and/or at a distance from the first component (60), the second component (60') preferably having similar or the same characteristics, such as shape and/or function, as the first component (60).
The extraction device (14) according to any of the preceding claims,
characterized in that
the alignment means (60, 60', 72) comprises a third component (72), preferably being or comprising a tongue or a protrusion element, for centring the cover element (26) with the inlet opening (24), wherein
- the first component (60) and/or the second component (60') is arranged at or next to the rim or edge of the inlet opening (24), and the third component (72) is arranged, continuously or discontinuously, at or next to the rim or edge of the cover element (26), or

- the first component and/or the second component is arranged at or next to the rim or edge of the cover element (26), and the third component is arranged, continuously or discontinuously, at or next to the rim or edge of the inlet opening (24).
The extraction device (14) according to claim 6,
characterized in that
the third component (72) is configured to be inserted into the groove or recess (66) by sliding along the at least one bevelled edge or inclined surface between the two elevations (64a, 64b).
The extraction device (14) according to claim 6 or 7,
characterized in that
the third component (72) is configured for adjusting the installation height of the cover element (26) within the inlet opening (24), preferably by adjusting the top surface of the cover element (26) flush with the top surface of the cooking hob (12).
The extraction device (14) according to any of the preceding claims,
characterized in that
the first component or the second component or the third component (72) is arranged at the rim or edge of the cover element (26) and comprises at least one lateral tongue or protrusion (76) configured for being inserted in a groove or a recess (66) of the rim or edge of the inlet opening (24) or

the first component or the second component or the third component is arranged at the rim or edge of the inlet opening (24) and comprises at least one lateral tongue or protrusion configured for being inserted in a groove or a recess of the rim or edge of the cover element (26).
The extraction device (14) according to any of the preceding claims,
characterized in that
the first component or the second component or the third component is arranged at the rim or edge of the cover element (26) and comprises at least one lateral groove or recess configured for receiving a lateral edge of a tongue or protrusion of the rim of the inlet opening (24) or

the first component (60) or the second component (60') or the third component is arranged at the rim or edge of the inlet opening (24) and comprises at least one lateral groove or recess (66) configured for receiving a lateral edge of a tongue or protrusion (76) of the rim or edge of the cover element (26) .
The extraction device (14) according to any of the preceding claims,
characterized in that
the first component (60) and/or the second component (60') and/or the third component (72) is or are configured to guide the installation of the cover element (26) into the inlet opening (24) in such a way that a misplacement of the cover element (26) is prevented.
The extraction device (14) according to any of the preceding claims,
characterized in that
the first component and/or the second component and/or the third component (72) is made of an elastic material, preferably made of rubber, and wherein the elastic material is deformable in at least one direction.
The extraction device (14) according to claim 12,
characterized in that
the elastic material of the first component and/or the second component and/or the third component (72) is configured for providing an exact positioning of the cover element (26) to the inlet opening (24), by centring the cover element (26) in at least one direction, preferably in relation to a reference plane of a top surface of the cooking hob (12), and wherein the top surface of the cover element (26) is preferably flush with the top surface of the cooking hob (12).
The extraction device (14) according to any of the preceding claims,
characterized in that
the first component (60) of the alignment means (60, 60', 72) of the extraction device (14) comprises at least one bevelled edge or inclined surface, wherein the first component (60) and the second component (60') are arranged at the rim or edge of the inlet opening (24), and the third component (72) is arranged at the rim or edge of the cover element (26), wherein the first component (60) and/or the second component (60') and/or the third component (72) is made of elastic material, wherein the alignment means (60, 60', 72) is configured to centre the cover element (26) with the inlet opening (24) for providing an exact positioning of the cover element (26) in relation to the inlet opening (24), wherein the top surface of the cover element (26) is flush with the top surface of the cooking hob (12), preferably the flush installation is determined by the height and thickness of the third component (72) and/or the thickness of the cover element (26) .
A combination appliance (10) comprising a cooking hob (12) with at least one cooking zone (20a, 20b) and an extraction device (14) according to any one of the preceding claims.