Vapour extraction device that can be integrated structurally into a cooking hob and cooking hob

Abstract

The invention relates to a ventilation device (4) for a cooktop (2) for structural integration into the cooktop (2), comprising a ventilation device housing (6) for arranging the ventilation device (4) below a cooktop plate (8) of the cooktop (2) with an intake duct (12) flow-conductingly connected to an intake opening (10) in the cooktop plate (8), a grease filter (14) arranged in the ventilation device housing (6), an odor filter arranged in the ventilation device housing (6) and in the direction of flow after the grease filter (14), and a fan arranged in the ventilation device housing (6) and in the direction of flow after the grease filter (14) for extracting fumes rising above the cooktop (2).wherein the extractor hood housing (6) has at least in the area of ​​the intake duct (12) at least one double-walled housing wall (16) with an inner wall (18) facing the grease filter (14) and an outer wall (20) facing away from the grease filter (14), wherein the inner wall (18) and the outer wall (20) enclose a space (22).

Description

[0001] The invention relates to a ventilation device that can be structurally integrated into a cooktop according to the preamble of claim 1 and to a cooktop with a ventilation device structurally integrated into the cooktop.

[0002] Such extractor hoods for structural integration into a cooktop, and cooktops with structurally integrated extractor hoods, are already known in the art in a multitude of embodiments. The known extractor hoods comprise an extractor hood housing for arranging the extractor hood below a cooktop surface, with an intake duct connected to an intake opening in the cooktop surface in a flow-conducting manner; a grease filter arranged in the extractor hood housing; an odor filter arranged in the extractor hood housing and downstream of the grease filter; and a fan arranged in the extractor hood housing and downstream of the grease filter for extracting fumes rising from above the cooktop. Extractor hoods of this type are also referred to as downdraft extractors or cooktop extractors.

[0003] EP 3 855 077 A2 describes a cooker hood in which a stream of cooking fumes is directed to a blower via an inner wall and an outer wall arranged offset from it.

[0004] The invention thus addresses the problem of improving a ventilation device for structural integration into a cooktop and a cooktop with a structurally integrated ventilation device.

[0005] According to the invention, this problem is solved by a range hood with the features of claim 1, characterized in that the range hood housing has at least one double-walled housing wall, at least in the area of ​​the intake duct, with an inner wall facing the grease filter and an outer wall facing away from the grease filter, wherein the inner wall and the outer wall enclose a space. Furthermore, this problem is solved by a cooktop with the features of claim 10. Advantageous embodiments and further developments of the invention are described in the following dependent claims.

[0006] The advantage achievable with the invention lies particularly in the fact that a range hood for structural integration into a cooktop and a cooktop with a structurally integrated range hood are improved. Due to the inventive design of the range hood and the cooktop, the noise emission of the range hood structurally integrated into the cooktop can be significantly reduced. Accordingly, compared to the prior art, the invention enables lower noise emission at the same volume flow rate through the range hood, or constant noise emission at a higher volume flow rate than in the prior art, i.e., with stronger extraction and thus a higher extraction capacity of fumes rising from the cooktop.

[0007] In principle, the extractor hood according to the invention can be freely selected within wide suitable limits with regard to type, function, material and dimensions. For example, the extractor hood according to the invention can be advantageously used for both household cooktops and commercial cooktops, i.e. cooktops for professional use.

[0008] An advantageous further development of the extractor hood according to the invention for a cooktop, for structural integration into the cooktop, provides that the grease filter is arranged such that the grease filter extends at least partially into the area of ​​the intake duct, preferably that the grease filter extends from the intake opening into the interior of the extractor hood housing, and particularly preferably that the grease filter is designed as a V-shaped grease filter. In this way, it is ensured that the fumes rising from the cooktop are reliably guided through the grease filter. This applies in particular to the preferred embodiment of this further development.The particularly preferred embodiment of this further development has the additional advantage that, by means of this special shape of the grease filter, the flow cross-section of the grease filter for the fumes can be doubled in a very simple manner from a design and manufacturing perspective. Furthermore, with this latter embodiment, it is possible to divide the fumes, i.e., the volume flow, as desired before they pass through the odor filter, without requiring any additional components. Overall, the present embodiment of the inventive extractor device enables a very compact design, particularly with regard to the height of the extractor device.

[0009] A further advantageous embodiment of the extractor hood according to the invention for structural integration into the cooktop provides that the extractor hood housing has at least one double-walled housing wall only in the area of ​​the intake duct, preferably that the extractor hood housing has only a single double-walled housing wall in the area of ​​the intake duct. This allows the overall volume of the extractor hood according to the invention, and thus the installation space required for the extractor hood according to the invention, to be reduced to a minimum, despite significantly improved noise reduction. This applies particularly to the preferred embodiment of this embodiment, since the design of the housing walls as double-walled housing walls is reduced to only a single such housing wall.This is because positioning at least one double-walled housing wall in the area of ​​the intake duct, and in particular positioning only the single double-walled housing wall in this area, results in very high effectiveness, namely very high noise reduction.

[0010] According to the invention, one of the at least one double-walled housing wall, or the single double-walled housing wall, is arranged directly adjacent to the grease filter on the side of the grease filter facing away from the odor filter and the blower. In this way, the positioning of this double-walled housing wall is further optimized with regard to its noise reduction.

[0011] A further advantageous embodiment of the inventive extractor hood for a cooktop, designed for structural integration into the cooktop, provides that the space between at least one of the at least one double-walled housing walls is filled or evacuated with a gas. This allows the at least one double-walled housing wall to be realized in a particularly simple manner from a structural and manufacturing perspective. Air or similar gases can be used, for example.

[0012] Another advantageous embodiment of the inventive extractor hood for a cooktop, for structural integration into the cooktop, provides that a stiffening structure is arranged in the space between at least one of the at least one double-walled housing wall, connecting the inner and outer walls in a force-transmitting manner. Preferably, the stiffening structure is designed as a plurality of ribs, and particularly preferably, the stiffening structure has a zigzag cross-section. In this way, it is possible, for example, to significantly reduce the respective wall thickness of the inner and / or outer wall of the double-walled housing. Accordingly, material and weight can be saved. Furthermore, the preferred embodiment of this embodiment provides a structurally and manufacturably simple and very effective stiffening structure.Furthermore, the particularly preferred embodiment of this further development enables additional material and weight savings while maintaining the same stability.

[0013] A particularly advantageous embodiment of the inventive extractor hood for a cooktop, designed for structural integration into the cooktop, provides that a noise-dampening filling made of a different material than the double-walled housing is arranged in the space between at least one of the at least one double-walled housing walls, preferably that the space is substantially completely filled with the noise-dampening filling. This significantly reduces noise emission via this double-walled housing wall. This is especially true for the preferred embodiment of this embodiment, since there are essentially no cavities in the space between, i.e., spaces not filled with the noise-dampening filling.

[0014] A further particularly advantageous embodiment of the inventive extractor hood for a cooktop, designed for structural integration into the cooktop, provides that the inner wall and / or the outer wall of at least one of the at least one double-walled housing wall is designed as a perforated wall. In this way, the weight of this double-walled housing wall, and thus the overall weight of the inventive extractor hood, can be significantly reduced. This is especially true when the latter embodiment is used simultaneously, i.e., when a noise-dampening filling is employed, so that this single or double perforation does not lead to any potential functional disadvantages in the use of the inventive extractor hood.In other embodiments of the extractor hood according to the invention, i.e., when no sound-absorbing filling is used, it is more practical to forgo perforating the inner and outer walls. Perforation here refers to any suitable and practical type of hole made in the respective wall, whereby the number, arrangement, size, and shape of the holes in the wall can be determined according to the requirements of the individual case.

[0015] Furthermore, another advantageous embodiment of the inventive extractor device for a cooktop, for structural integration into the cooktop, provides that the extractor device housing, with its at least one double-walled housing, is designed and the grease filter and / or odor filter are detachably arranged on the extractor device housing in such a way that the respective filter can be cleaned and / or replaced on site. This makes it possible, in principle, to clean and / or replace the grease filter and / or odor filter on site, i.e., at the installation location of the cooktop.

[0016] Accordingly, an advantageous further development of the cooktop according to the invention provides that the extractor fan is arranged in the cooktop in such a way that the grease filter and / or the odor filter can be cleaned and / or replaced on site.

[0017] Five embodiments of the invention are shown schematically in the drawings and are described in more detail below. It shows Figure 1 shows a first embodiment of the cooktop according to the invention with the extractor hood according to the invention in a partial, cutaway side view; Figure 2 shows a first variant of a second embodiment of the cooktop according to the invention with the extractor hood according to the invention in a partial, cutaway side view; Figure 2 shows a second variant of the second embodiment of the cooktop according to the invention with the extractor hood according to the invention in a partial perspective view; Figure 2 shows a third variant of the second embodiment of the cooktop according to the invention with the extractor hood according to the invention in an analogous representation to Figure 1. Fig. 2b Figure 3 shows a third embodiment of the cooktop according to the invention with the extractor hood according to the invention in a partial, cutaway side view, Figure 4 shows a fourth embodiment of the cooktop according to the invention with the extractor hood according to the invention in a partial, cutaway side view and Figure 5 shows a fifth embodiment of the cooktop according to the invention with the extractor hood according to the invention in a partial, perspective view.

[0018] In the Fig. 1 A first embodiment of the cooktop according to the invention, together with the extractor hood according to the invention, is shown purely by way of example.

[0019] The cooktop 2 is designed as an induction cooktop and has a ventilation device 4 integrated into the cooktop 2.

[0020] The extractor hood 4 comprises an extractor hood housing 6 for arranging the extractor hood 4 below a cooktop 8 of the cooktop 2, with an intake duct 12 connected to an intake opening 10 in the cooktop 8 in a flow-conducting manner, a grease filter 14 arranged in the extractor hood housing 6, an odor filter (not shown) arranged in the extractor hood housing 6 and downstream of the grease filter 14, and a fan (not shown) arranged in the extractor hood housing 6 and downstream of the grease filter 14 for extracting fumes (also not shown) rising from the cooktop 2. The aforementioned odor filter, for example an activated carbon filter, can generally be arranged upstream or downstream of the fan.

[0021] According to the invention, the extractor hood housing 6 has at least in the area of ​​the intake shaft 12 at least one double-walled housing wall 16 with an inner wall 18 facing the grease filter 14 and an outer wall 20 facing away from the grease filter 14, wherein the inner wall 18 and the outer wall 20 enclose a space 22.

[0022] In the present embodiment, the grease filter 14 is arranged such that it extends at least partially into the area of ​​the intake duct 12, specifically such that, starting from the intake opening 10, it extends into the interior of the extractor hood housing 6. Furthermore, the grease filter 14 is designed here as a V-shaped grease filter. As can be seen from the Fig. 1 As can be seen, the base of the grease filter 14 is arranged directly at the intake opening 10 of the cooktop 8, so that the fumes (not shown) extracted above the cooktop 2 pass directly from the intake opening 10 through the open base of the grease filter 14 into the interior of the grease filter 14. As the fumes flow through the grease filter 14, the volume flow is essentially divided into two partial flows, one of which passes through a [missing information - likely a specific opening or feature] in the plane of the image. Fig. 1 The left-hand side wall of the grease filter 14 and the other partial flow of the vapor through a [unclear] in the image plane of the Fig. 1 The vapor flows through the side wall of the grease filter 14 shown on the right. In this way, the grease filter 14 can, for example, serve to divide the vapor before it flows into the odor filter (not shown).

[0023] According to the invention, the extractor hood housing 6 has at least one double-walled housing wall only in the area of ​​the intake duct 12, preferably only the one in the Fig. 1 The single double-walled housing wall 16 is shown. This single double-walled housing wall 16 is located directly adjacent to the grease filter 14, with the housing wall 16 being situated on the side of the grease filter 14 facing away from the odor filter and the blower (which are not shown). Accordingly, the odor filter and the blower are located here on the side shown in the image plane. Fig. 1 left side of the grease filter 14.

[0024] Furthermore, the space 22 bounded by the inner wall 18 and the outer wall 20 is filled only with a gas, namely air. In other embodiments of the extractor hood according to the invention, however, it would alternatively be conceivable that the at least one space is either filled with another gas or evacuated.

[0025] To increase the user-friendliness of the cooktop 2, the extractor hood 4 is arranged in the cooktop 2 in such a way that the grease filter 14 and the odor filter are detachably arranged on the extractor hood housing 6, so that the grease filter 14 and the odor filter can be cleaned and / or replaced on site, i.e. at the installation location of the cooktop 2.

[0026] The following describes the functioning of the cooktop according to the invention with the extractor hood according to the invention, as illustrated in the present embodiment: Fig. 1 briefly explained.

[0027] The hob 2 with the extractor fan 4 is installed in a kitchen unit (not shown), for example a worktop or the like, and is ready for use.

[0028] The cooktop 8 has a total of four unidentified cooking zones, which are arranged as usual on the cooktop 8. Of the four aforementioned cooking zones, the following are shown in the image plane: Fig. 1 Two of the cooking zones are arranged to the left and right of the intake opening 10. This ensures efficient extraction of steam rising above the cooking zone 2, regardless of which cooking zone is actually used during a cooking process.

[0029] The extractor hood 4 is designed, as is customary, such that the fumes flow through it in a guided forced flow, whereby all the fumes are forcibly drawn first through the grease filter 14 and then through the odor filter (also not shown) by means of the fan (not shown). The fumes, cleaned in this way, can then either be recirculated back into the kitchen area (not shown) in which the cooktop 2 is located, or conveyed by the fan into the surrounding environment via a flow connection (not shown).

[0030] Accordingly, the vapor extracted by the fan above the hob 2 enters the extractor housing 6 through the intake opening 10 and first flows through the V-shaped grease filter 14. As can be seen from the Fig. 1 As can be seen and has already been explained above, the vapor stream is not only freed from grease (not shown) by means of the grease filter 14, but is also simultaneously divided into two essentially equal partial streams, with one of the two partial streams in the plane of the image. Fig. 1 left through the grease filter 14 and the other of the two partial flows in the image plane of the Fig. 1 passes through the grease filter 14 on the right.

[0031] The vapor stream, divided in the aforementioned manner, is drawn through the odor filter by means of the blower, provided the odor filter is arranged in the direction of flow in front of the blower, whereby the vapor enters the odor filter essentially evenly distributed over the entire inlet area of ​​the odor filter due to the previous division of the vapor stream into the two partial streams.

[0032] As already explained, the cleaned fumes can then either be returned to the kitchen (not shown) in recirculation mode by the extractor hood 4, where the cooktop 2 is located, or, in exhaust mode, be conveyed into the surrounding environment by the fan via a flow connection (not shown). The extractor hood 4 can be used advantageously in both recirculation and exhaust modes. To accommodate local conditions, the extractor hood 4 is designed to be usable in both recirculation and exhaust modes. Accordingly, it is unnecessary to implement the extractor hood according to the invention in two versions, namely for recirculation and exhaust modes. The necessary adjustments to the extractor hood 4 are made directly on-site during the installation of the cooktop 2.

[0033] According to the invention, the unavoidable operating noises during the aforementioned operation of the extractor hood 4 can be effectively reduced by means of the housing wall 16, which is designed as a double wall and arranged in the area of ​​the intake duct 12, so that the aforementioned operation of the extractor hood 4 is at least less disturbing for persons who are in the vicinity of the hob 2.

[0034] In the Fig. 2a bis 5 Four further embodiments of the invention are shown, the second embodiment being according to the Fig. 2a bis 2c Furthermore, it is implemented in three variants. The aforementioned further embodiments are explained below only to the extent of their respective distinguishing features compared to the aforementioned embodiments. Otherwise, reference is made to the above explanations for the first embodiment. Identical or equivalently functioning components are to be identified with the same reference numerals as in the first embodiment according to the Fig. 1 designated.

[0035] The second embodiment in the three variants according to the Fig. 2a bis 2c differs from the first embodiment in that a stiffening structure 24 is arranged in the space 22 of the double-walled housing wall 16, which connects the inner wall 18 and the outer wall 20 in a force-transmitting manner.

[0036] The stiffening structure 24 according to the one in the Fig. 2a The first variant of the second embodiment shown is designed as a plurality of ribs, wherein the individual ribs are arranged relative to each other in such a way that the stiffening structure 24 is in the Fig. 2a The cross-section shown has a zigzag shape.

[0037] During the Fig. 2b In the second variant of the second embodiment shown, the stiffening structure 24 is also designed as a plurality of ribs. In contrast to the first variant according to the Fig. 2a However, the individual ribs are spaced apart from each other and arranged parallel in the space 22.

[0038] The third variant of the second embodiment according to the Fig. 2c The second embodiment differs from the first and second variants in that the double-walled housing wall 16 extends only over a section of the intake duct 12 and thus only over a partial height of the extractor hood 4. The remaining portion, directly adjoining the double-walled housing wall 16, is the single-walled housing of the extractor hood 6.

[0039] In the Fig. 3 Figure 1 shows the third embodiment of the cooktop according to the invention with the extractor hood according to the invention. Unlike the first and second embodiments, a noise-dampening filling 26, made of a different material than the double-walled housing wall 16, is arranged in the space 22 bounded by the inner wall 18 and the outer wall 20 of the double-walled housing wall 16, wherein the space 22 is essentially completely filled with the noise-dampening filling 26 in the present third embodiment.

[0040] The Fig. 4 Figure 4 shows the fourth embodiment of the cooktop according to the invention with the extractor hood according to the invention. While in the aforementioned embodiments according to the Fig. 1 bis 3 The space 22 is filled either with a gas or a stiffening structure 24 or a noise-dampening filling 26, the space 22 of the double-walled housing wall 16 is here filled with an analogous material to the second embodiment according to the Fig. 2a formed stiffening structure 24 as well as with an analogous embodiment to the third embodiment according to the Fig. 3 filled with a sound-absorbing material 26. Accordingly, the present fourth embodiment combines the advantages of the second and third embodiments.

[0041] Furthermore, in the Fig. 5 The fifth embodiment of the cooktop according to the invention is shown with the extractor hood according to the invention. Similar to the aforementioned fourth embodiment, the space 22 of the double-walled housing wall 16 is here lined with an analogous material to the second embodiment according to the Fig. 2b formed stiffening structure 24 as well as with an analogous embodiment to the third embodiment according to the Fig. 3 filled with a sound-absorbing material 26. Accordingly, the present fifth embodiment also combines the advantages of the second and third embodiments. Furthermore, in the present fifth embodiment, the outer wall 20 of the double-walled housing wall 16 is designed as a perforated wall similar to a perforated plate. See the Fig. 5 , where, for the sake of visibility, the inner wall 18 is shown partially cut away and the sound-absorbing filling 26 actually present in the space 22 is not shown in some areas.

[0042] Due to the inventive design of the extractor hood 4 and the cooktop 2, the noise emission of the extractor hood 4, which is structurally integrated into the cooktop 2, can be significantly reduced. Accordingly, compared to the prior art, the invention enables lower noise emission at the same volume flow rate through the extractor hood 4, or constant noise emission at a higher volume flow rate than in the prior art, i.e., with stronger extraction and thus a higher extraction capacity of fumes rising above the cooktop 2.

[0043] However, the invention is not limited to the present embodiments. See, for example, the relevant explanations in the introductory section, according to which the extractor hood according to the invention can be advantageously used for both household and commercial cooktops, i.e., cooktops for professional use. Furthermore, the type and function of the cooktop are freely selectable within wide suitable limits and are not limited to induction cooktops, as in the present embodiment. The same applies to the number and design of the cooking zones arranged on the cooktop surface. For example, the invention can also be advantageously used with so-called flat cooktops.

Claims

1. Extractor hood device (4) for a cooking hob (2) for structural integration into the cooking hob (2), comprising an extractor hood device housing (6) for arranging the extractor hood device (4) below a hob plate (8) of the cooking hob (2) with a suction duct (12) that is fluidically connected to a suction opening (10) in the hob plate (8), a grease filter (14) arranged in the extractor hood device housing (6), an odour filter arranged in the extractor hood device housing (6) and downstream of the grease filter (14) in the direction of flow, and a fan for extracting vapours rising above the cooking hob (2), which fan is arranged in the extractor hood device housing (6) and downstream of the grease filter (14) in the direction of flow, characterised in that the extractor hood device housing (6) has, at least in the region of the suction duct (12), at least one double-walled housing wall (16) having an inner wall (18) facing the grease filter (14) and an outer wall (20) facing away from the grease filter (14), the inner wall (18) and the outer wall (20) enclosing an intermediate space (22), one of the at least one double-walled housing wall (16) being arranged directly adjacent to the grease filter (14) on the side of the grease filter (14) facing away from the odour filter and the fan.

2. Extractor hood device (4) according to claim 1, characterised in that the grease filter (14) is arranged such that the grease filter (14) extends at least partially into the region of the suction duct (12), preferably in that the grease filter (14) extends from the suction opening (10) into an interior of the extractor hood device housing (6), particularly preferably in that the grease filter (14) is designed as a V-shaped grease filter.

3. Extractor hood device (4) according to claim 1 or 2, characterised in that the extractor hood device housing (6) has at least one double-walled housing wall (16) only in the region of the suction duct (12), preferably in that the extractor hood device housing (6) has only a single double-walled housing wall (16) in the region of the suction duct (12).

4. Extractor hood device (4) according to any of claims 1 to 3, characterised in that the intermediate space (22) of at least one of the at least one double-walled housing wall (16) is filled with a gas or is evacuated.

5. Extractor hood device (4) according to any of claims 1 to 4, characterised in that a reinforcing structure (24) that force-transmittingly connects the inner wall (18) and the outer wall (20) is arranged in the intermediate space (22) of at least one of the at least one double-walled housing wall (16), preferably in that the reinforcing structure (24) is designed as a plurality of ribs, particularly preferably in that the reinforcing structure (24) has a zigzag cross-section.

6. Extractor hood device (4) according to any of claims 1 to 5, characterised in that a noise-dampening filling (26) made of a different material than the double-walled housing wall (16) is arranged in the intermediate space (22) of at least one of the at least one double-walled housing wall (16), preferably in that the intermediate space (22) is substantially completely filled with the noise-dampening filling (26).

7. Extractor hood device (4) according to any of claims 1 to 6, characterised in that the inner wall and / or the outer wall (20) of at least one of the at least one double-walled housing wall (16) are / is designed as a perforated wall.

8. Extractor hood device (4) according to any of claims 1 to 7, characterised in that the extractor hood device housing (6) is designed with at least one double-walled housing wall (16) and the grease filter (14) and / or the odour filter are detachably arranged on the extractor hood device housing (6), such that the relevant filter can be cleaned and / or replaced in situ.

9. Cooking hob (2) comprising an extractor hood device (4) that is structurally integrated in the cooking hob (2), characterised in that the extractor hood device (4) is designed according to any of claims 1 to 8.

10. Cooking hob (2) according to claim 9, characterised in that the extractor hood device (4) is arranged in the cooking hob (2) such that the grease filter (14) and / or the odour filter can be cleaned and / or replaced in situ.

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