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 an extractor device that can be structurally integrated into a hob according to the preamble of patent claim 1 and to a hob with an extractor device that is structurally integrated into the hob.

[0002] Such extractor hoods for structural integration into a hob and hobs with structurally integrated extractor hoods are already known in a variety of designs from the prior art. The known extractor hoods comprise an extractor hood housing for arranging the extractor hood below a hob panel of the hob, with an intake duct fluidically connected to an intake opening in the hob panel, a grease filter arranged in the extractor hood housing, an odor filter arranged in the extractor hood housing and downstream of the grease filter in the direction of flow, and a fan arranged in the extractor hood housing and downstream of the grease filter in the direction of flow for extracting vapors rising above the hob. Extractor hoods of this type are also referred to as table fans or downdraft extractors.

[0003] The invention therefore addresses the problem of improving an extractor device for structural integration into a hob and a hob with a structurally integrated extractor device.

[0004] According to the invention, this problem is solved by an extractor device having the features of patent claim 1, which is characterized in that the extractor device housing, at least in the region of the intake shaft, has at least one double-walled housing wall 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 gap. Furthermore, this problem is solved by a cooktop having the features of patent claim 10. Advantageous embodiments and further developments of the invention are set forth in the following subclaims.

[0005] The advantage achievable with the invention lies in the fact that an extractor device for structural integration into a hob and a hob with a structurally integrated extractor device are improved. Due to the inventive design of the extractor device and the hob, the noise emissions of the extractor device structurally integrated into the hob can be significantly reduced. Accordingly, the invention enables lower noise emissions compared to the prior art with the same volume flow through the extractor device or constant noise emissions with a higher volume flow compared to the prior art, i.e., with stronger extraction and thus a higher extraction performance of vapors rising above the hob.

[0006] In principle, the extractor hood according to the invention can be freely selected within wide, suitable limits in terms of type, mode of operation, 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.

[0007] An advantageous development of the extractor device according to the invention for a hob for structural integration into the hob provides that the grease filter is arranged such that the grease filter extends at least partially into the area of ​​the intake shaft. Preferably, the grease filter extends from the intake opening into the interior of the extractor device housing. Particularly preferably, the grease filter is designed as a V-shaped grease filter. This ensures that the vapors rising above the hob are reliably guided through the grease filter. This applies in particular to the preferred embodiment of this development.The particularly preferred embodiment of this refinement has the additional advantage that, thanks to this special shape of the grease filter, the flow cross-section of the grease filter for the vapors can be doubled in a very simple manner, both in terms of design and manufacturing technology. Furthermore, the latter embodiment of this refinement makes it possible to divide the vapors, i.e., the volume flow, as desired before passing through the odor filter, without the need for additional components. Overall, the present refinement of the extractor device according to the invention enables a very compact design, particularly with regard to the height of the extractor device.

[0008] A further advantageous development of the extractor device according to the invention for a hob for structural integration into the hob provides that the extractor device housing has at least one double-walled housing wall only in the area of ​​the intake shaft, preferably that the extractor device housing has only a single double-walled housing wall in the area of ​​the intake shaft. As a result, the overall volume of the extractor device according to the invention and thus the installation space required for the extractor device according to the invention in the hob can be reduced to a minimum, despite significantly improved noise reduction. This applies in particular to the preferred embodiment of this development, since here the design of the housing walls as a double-walled housing wall is reduced to just a single such housing wall.This is because positioning at least one double-walled housing wall in the area of ​​the intake shaft, in particular positioning only the single double-walled housing wall in this area, results in a very high level of effectiveness, namely a very high level of noise reduction.

[0009] Another advantageous development of the extractor device according to the invention for a hob for structural integration into the hob provides that one of the at least one double-walled housing wall or the one double-walled housing wall is arranged directly adjacent to the grease filter, preferably on the side of the grease filter facing away from the odor filter and the fan. In this way, the positioning of this double-walled housing wall is further optimized with regard to its noise reduction. This applies particularly to the preferred embodiment of this development.

[0010] A further advantageous development of the extractor device according to the invention for a hob for structural integration into the hob 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 in terms of design and manufacturing technology. Air or the like can be used as the gas, for example.

[0011] Another advantageous development of the extractor hood device according to the invention for a hob for structural integration into the hob provides that a stiffening structure connecting the inner wall and the outer wall in a force-transmitting manner is arranged in the space between at least one of the at least one double-walled housing walls. Preferably, the stiffening structure is designed as a plurality of ribs, particularly preferably, the stiffening structure has a zigzag shape in cross-section. In this way, it is possible, for example, to significantly reduce the respective wall thickness of the inner wall and / or the outer wall of the double-walled housing wall. Accordingly, material and weight can be saved. The preferred embodiment of this development also provides a stiffening structure that is simple in terms of design and manufacturing technology and very effective.Furthermore, the particularly preferred embodiment of this further development enables additional material and weight savings while maintaining the same stability.

[0012] A particularly advantageous development of the extractor device according to the invention for a hob for structural integration into the hob provides that a noise-damping filling made of a different material than the double-walled housing wall is arranged in the space between at least one of the at least one double-walled housing walls. Preferably, the space is essentially completely filled with the noise-damping filling. As a result, noise emissions can be significantly reduced by means of this double-walled housing wall. This applies in particular to the preferred embodiment of this development, since there are essentially no more cavities in the space, i.e. spaces not filled with the noise-damping filling.

[0013] A further particularly advantageous development of the extractor device according to the invention for a hob for structural integration into the hob provides that the inner wall and / or the outer wall of at least one of the at least one double-walled housing wall is / are designed as a perforated wall. In this way, the weight of this double-walled housing wall and thus the overall weight of the extractor device according to the invention can be significantly reduced. This applies in particular when the latter development is used simultaneously, i.e., when a sound-damping filling is used, so that this single or double perforation does not lead to any functional disadvantages in the use of the extractor device according to the invention.In other embodiments of the extractor hood according to the invention, i.e., when no soundproofing filling is used, it is more sensible to dispense with perforations in the inner and outer walls. Perforation is understood here to mean any suitable and reasonable type of perforation in the respective wall, whereby the number, arrangement, size, and shape of the holes in the wall can be determined depending on the requirements of the individual case.

[0014] Furthermore, another advantageous development of the extractor device according to the invention for a hob for structural integration into the hob provides that the extractor device housing with the at least one double-walled housing wall is designed in such a way, and the grease filter and / or the 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 fundamentally enables cleaning and / or replacement of the grease filter and / or the odor filter on site, i.e., at the installation location of the hob.

[0015] Accordingly, an advantageous development of the hob according to the invention provides that the extractor device is arranged in the hob in such a way that the grease filter and / or the odor filter can be cleaned and / or replaced on site.

[0016] Five embodiments of the invention are shown purely schematically in the drawings and are described in more detail below. Figure 1 shows a first embodiment of the hob according to the invention with the extractor device according to the invention in a partial, sectional side view, Figure 2a shows a first variant of a second embodiment of the hob according to the invention with the extractor device according to the invention in a partial, sectional side view, Figure 2b shows a second variant of the second embodiment of the hob according to the invention with the extractor device according to the invention in a partial, perspective view, Figure 2c shows a third variant of the second embodiment of the hob according to the invention with the extractor device according to the invention in an analogous representation to Fig. 2b , Figure 3 shows a third embodiment of the hob according to the invention with the extractor device according to the invention in a partial, sectional side view, Figure 4 shows a fourth embodiment of the hob according to the invention with the extractor device according to the invention in a partial, sectional side view and Figure 5 shows a fifth embodiment of the hob according to the invention with the extractor device according to the invention in a partial, perspective view.

[0017] In the Fig. 1 A first embodiment of the hob according to the invention with the extractor device according to the invention is shown purely by way of example.

[0018] The hob 2 is designed as an induction hob and has an extractor device 4 structurally integrated into the hob 2.

[0019] The extractor device 4 comprises an extractor housing 6 for arranging the extractor device 4 below a cooking surface 8 of the cooking surface 2, having an intake duct 12 fluidly connected to an intake opening 10 in the cooking surface 8, a grease filter 14 arranged in the extractor housing 6, an odor filter (not shown) arranged in the extractor housing 6 and downstream of the grease filter 14 in the flow direction, and a fan (not shown) arranged in the extractor housing 6 and downstream of the grease filter 14 in the flow direction for extracting vapors (also not shown) rising above the cooking surface 2. The aforementioned odor filter, for example an activated carbon filter, can in principle be arranged upstream or downstream of the fan in the flow direction.

[0020] According to the invention, the extractor housing 6 has, at least in the region 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 an intermediate space 22.

[0021] In the present embodiment, the grease filter 14 is arranged such that the grease filter 14 extends at least partially into the area of ​​the intake shaft 12, namely such that the grease filter 14 extends from the intake opening 10 into the interior of the extractor housing 6. Furthermore, the grease filter 14 is designed here as a V-shaped grease filter. The grease filter 14 is, as can be seen from the Fig. 1 visible, with a base of the grease filter 14 arranged directly at the suction opening 10 of the hob plate 8, so that the vapors extracted above the hob 2, not shown, from the suction opening 10 through the open base of the grease filter 14 directly into the interior of the grease filter 14. When flowing through the grease filter 14, the vapors, i.e. the volume flow, are essentially divided into two partial flows, wherein one partial flow of the vapors is Fig. 1 the left side wall of the grease filter 14 and the other partial flow of the vapor through a Fig. 1 The grease filter 14 flows through the side wall shown on the right. In this way, the grease filter 14 can be used, for example, to divide the vapors before they flow into the odor filter (not shown).

[0022] In the present embodiment, the extractor housing 6 has at least one double-walled housing wall only in the area of ​​the suction shaft 12, namely only the one in the Fig. 1 This single double-walled housing wall 16 is arranged directly adjacent to the grease filter 14, wherein the housing wall 16 is arranged on the side of the grease filter 14 facing away from the odor filter (not shown) and the fan (also not shown). Accordingly, the odor filter and the fan are located here on the side in the image plane of the Fig. 1 left side of the grease filter 14.

[0023] Furthermore, the intermediate space 22 delimited by the inner wall 18 and the outer wall 20 is filled with only one gas, namely air. In other embodiments of the extractor device according to the invention, however, it would also be conceivable for the at least one intermediate space to be either filled with another gas or evacuated.

[0024] In order to increase the user-friendliness of the hob 2, on the one hand the extractor device 4 is arranged in the hob 2 and on the other hand the grease filter 14 and the odor filter are arranged detachably on the extractor device housing 6 in such a way 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 hob 2.

[0025] The following describes the operation of the cooking hob according to the invention with the extractor device according to the invention according to the present embodiment with reference to the Fig. 1 briefly explained.

[0026] The hob 2 with the extractor device 4 is installed in a piece of kitchen furniture not shown, for example a worktop or the like, and is ready for use.

[0027] The hob plate 8 has a total of four cooking zones, not further designated, which are distributed as usual on the hob plate 8. Of the four cooking zones mentioned above, only Fig. 1 Two of the cooking zones are arranged to the left and right of the intake opening 10. Accordingly, regardless of the cooking zone actually used during a cooking process, efficient extraction of vapors rising above the cooking zone 2 is possible.

[0028] The extractor device 4 is, as usual, designed such that the vapors flow through the extractor device 4 in a guided forced flow, with the entire vapor being forcibly drawn by the fan (not shown) first through the grease filter 14 and then through the odor filter (also not shown). The vapors cleaned in this way can then either be recirculated back into the kitchen area (not shown in detail), in which the hob 2 is installed, or be conveyed by the fan into an open environment by means of a flow connection (not shown).

[0029] Accordingly, the vapors extracted by the fan above the hob 2 pass through the intake opening 10 into the extractor housing 6 and first flow 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 flow is not only freed of fat (not shown) by means of the grease filter 14, but is simultaneously also divided into two essentially equal partial flows, one of the two partial flows being in the image plane of the Fig. 1 left through the grease filter 14 and the other of the two partial streams in the image plane of the Fig. 1 passes through the grease filter 14 on the right.

[0030] The vapor stream divided in the aforementioned manner is sucked through the odor filter by means of the fan, provided that the odor filter is arranged upstream of the fan in the flow direction, whereby the vapor enters substantially 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.

[0031] As already explained, the cleaned vapors can then either be guided back into the kitchen area (not shown in detail) in which the cooktop 2 is installed in a recirculation mode of the extractor device 4, or can be conveyed into an open environment by the fan via a flow connection (not shown) in an exhaust air mode of the extractor device 4. The extractor device 4 can advantageously be used in both recirculation mode and exhaust air mode. In order to be able to meet the on-site conditions, the extractor device 4 is designed such that the extractor device 4 can be used in both recirculation mode and exhaust air mode. Accordingly, there is no need to design the extractor device according to the invention in two variants, namely for recirculation mode and for exhaust air mode. The necessary adaptation of the extractor device 4 is carried out directly on site during installation of the cooktop 2.

[0032] The operating noises unavoidable during the aforementioned operation of the extractor device 4 can be effectively reduced according to the invention by means of the housing wall 16 which is designed as a double-walled one and arranged in the area of ​​the intake shaft 12, so that the aforementioned operation of the extractor device 4 is at least less disturbing for people staying in the vicinity of the cooking surface 2.

[0033] 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 designed in three variants. The aforementioned further embodiments are explained below only to the extent of the respective distinguishing features from the aforementioned embodiments. Otherwise, reference is made to the above explanations regarding the first embodiment. The same or equivalent components are identified by the same reference numerals as in the first embodiment according to the Fig. 1 designated.

[0034] 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 connecting the inner wall 18 and the outer wall 20 in a force-transmitting manner is arranged in the intermediate space 22 of the double-walled housing wall 16.

[0035] The stiffening structure 24 according to 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 one another in such a way that the stiffening structure 24 in the Fig. 2a shown cross-section has a zigzag shape.

[0036] In 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 one another and arranged parallel in the intermediate space 22.

[0037] The third variant of the second embodiment according to the Fig. 2c differs from the first and second variants of the second exemplary embodiment in that the double-walled housing wall 16 extends only over a portion of the intake shaft 12 and thus only over a partial height of the extractor device 4. Otherwise, i.e., directly adjacent to the double-walled housing wall 16, the extractor device housing 6 is only single-walled.

[0038] In the Fig. 3 The third embodiment of the cooktop according to the invention with the extractor hood according to the invention is shown. Unlike the first and second embodiments, a sound-damping filling 26 made of a different material than the double-walled housing wall 16 is arranged in the intermediate space 22 of the double-walled housing wall 16, defined by the inner wall 18 and the outer wall 20. In the present third embodiment, the intermediate space 22 is essentially completely filled with the sound-damping filling 26.

[0039] The Fig. 4 shows the fourth embodiment of the cooktop according to the invention with the extractor device according to the invention. While in the aforementioned embodiments according to the Fig. 1 bis 3 the intermediate space 22 is filled either with a gas or a stiffening structure 24 or a noise damping filling 26, the intermediate space 22 of the double-walled housing wall 16 is here filled with a gas analogous to the second embodiment according to the Fig. 2a formed stiffening structure 24 as well as with an analogous to the third embodiment according to the Fig. 3 formed noise damping filling 26. Accordingly, the present fourth embodiment combines the advantages of the second and third embodiments.

[0040] Furthermore, the Fig. 5 the fifth embodiment of the cooktop according to the invention with the extractor device according to the invention is shown. Similar to the aforementioned fourth embodiment, the intermediate space 22 of the double-walled housing wall 16 is here provided with a Fig. 2b formed stiffening structure 24 as well as with an analogous to the third embodiment according to the Fig. 3 formed noise damping filling 26. Accordingly, the present fifth embodiment also combines the advantages of the second and third embodiments. Furthermore, the outer wall 20 of the double-walled housing wall 16 in the present fifth embodiment is designed as a perforated wall in the manner of a perforated plate. See the Fig. 5 , whereby, for the sake of visibility, on the one hand the inner wall 18 is shown partially in section and, on the other hand, the noise damping filling 26 actually present in the intermediate space 22 is not shown in some areas.

[0041] Due to the inventive design of the extractor device 4 and the hob 2, the noise emission of the extractor device 4 structurally integrated into the hob 2 can be significantly reduced. Accordingly, the invention enables lower noise emission compared to the prior art with the same volume flow through the extractor device 4 or constant noise emission with a higher volume flow compared to the prior art, i.e., with stronger extraction and thus a higher extraction performance of vapors rising above the hob 2.

[0042] However, the invention is not limited to the present embodiments. See, for example, the relevant statements in the introduction to the description, according to which the extractor hood according to the invention can be advantageously used for both household cooktops and commercial cooktops, i.e., cooktops for professional use. Furthermore, the type and mode of operation of the cooktop can be freely selected within wide, suitable limits and is 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 plate. For example, the invention can also be advantageously used for so-called surface cooktops.

Claims

1. Extractor hood (4) for a hob (2) for structural integration into the hob (2), comprising an extractor hood housing (6) for arranging the extractor hood (4) below a hob plate (8) of the hob (2) with an intake shaft (12) fluidly connected to an intake opening (10) in the hob plate (8), a grease filter (14) arranged in the extractor hood housing (6), an odor filter arranged in the extractor hood housing (6) and downstream of the grease filter (14) in the flow direction, and a fan arranged in the extractor hood housing (6) and downstream of the grease filter (14) in the flow direction for extracting vapors rising above the hob (2), characterized in thatthe extractor housing (6) has, at least in the region 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 an intermediate space (22).

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

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

4. Extractor device (4) according to one of claims 1 to 3, characterized in that one of the at least one double-walled housing wall or the one double-walled housing wall (16) is arranged directly adjacent to the grease filter (14), preferably on the side of the grease filter (14) facing away from the odor filter and the fan.

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

6. Extractor device (4) according to one of claims 1 to 5, characterized in that in the intermediate space (22) of at least one of the at least one double-walled housing wall (16) a stiffening structure (24) connecting the inner wall (18) and the outer wall (20) in a force-transmitting manner is arranged, preferably that the stiffening structure (24) is designed as a plurality of ribs, particularly preferably that the stiffening structure (24) has a zigzag shape in cross section.

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

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

9. Extractor device (4) according to one of claims 1 to 8, characterized in that the extractor housing (6) with the at least one double-walled housing wall (16) is designed in such a way and the grease filter (14) and / or the odor filter are / is detachably arranged on the extractor housing (6) in such a way that the respective filter can be cleaned and / or replaced on site.

10. Hob (2) with an extractor device (4) structurally integrated into the hob (2), characterized in that the extractor device (4) is designed according to one of claims 1 to 9.

11. Hob (2) according to claim 10, characterized in thatthe extractor device (4) is arranged in the hob (2) in such a way that the grease filter (14) and / or the odor filter can be cleaned and / or replaced on site.