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

Abstract

The invention relates to a fume extraction device (4) comprising a grease filter (12), a collection tray (14) for liquid (16) arranged below the grease filter (12), and a blower (18), wherein the grease filter (12) has a fume inlet opening (22) and two fume outlets (24, 26) each designed as a filter wall, and wherein one fume outlet (24) is arranged on a side of the grease filter (12) facing the blower (18) and the other fume outlet (26) is arranged on a side of the grease filter (12) facing away from the blower (18), and wherein the fumes (20) exiting away from the blower can flow in an underflow between the grease filter (12) and the collection tray (14) in the direction of the blower (18), wherein at least one baffle wall is provided on the collection tray (14). (28, 30) is arranged for the separation of liquid (16) and fat carried along in the vapor (20),wherein one of the baffles (30) is arranged in a flow path of the vapor (20) between the grease filter (12) on the one hand and the blower (18) on the other, and wherein an upper surface of this baffle (30) facing the cooktop (8) has the same distance to the cooktop (8) as, or a smaller distance to, the cooktop (8) than an underside of the grease filter (12) facing the drip tray (14). The invention further relates to a cooktop (2).

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 a cooktop according to claim 10 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 element, a grease filter arranged in the extractor hood housing and connected to an extraction opening in the cooktop element in a flow-conducting manner, a drip tray for liquid arranged in the extractor hood housing below the grease filter and the extraction opening, and a fan arranged in the extractor hood housing and in the direction of flow towards the grease filter and the drip tray for extracting fumes rising above the cooktop.wherein the grease filter has a vapor inlet opening connected to the extraction opening in a flow-conducting manner for the vapor to enter the grease filter and two vapor outlets, each designed as a filter wall for removing grease contained in the vapor from the vapor, for the vapor to exit the grease filter, and wherein one vapor outlet is arranged on a side of the grease filter facing the blower and the other vapor outlet is arranged on a side of the grease filter facing away from the blower, and wherein the grease filter is arranged in the extractor hood housing at a vertical distance from the collection tray,that the fumes exiting the grease filter on the side facing away from the fan can flow in an underflow between the grease filter and the collection tray towards the fan. Extractor hoods of this type are also known as downdraft extractors or cooktop extractors. A known extractor hood for structural integration into a cooktop, which includes a liquid collection tray, is disclosed in EP 3 855 077 A2.

[0003] 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.

[0004] According to the invention, this problem is solved by a cooker hood with the features of claim 1, characterized in that at least one baffle is arranged on the collection tray for separating liquid and grease carried along in the steam, wherein one of the at least one baffle is arranged as a blower-side baffle in a flow path of the steam between the grease filter on the one hand and the blower on the other, and wherein an upper surface of the blower-side baffle facing the cooktop has the same distance to the cooktop as, or a smaller distance to the cooktop than, an underside of the grease filter facing the collection tray. 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.

[0005] 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 cooking fumes downstream of the grease filter and the drip tray are significantly better cleaned of grease and entrained moisture, such as water, so that less grease and moisture reach the fan. Accordingly, the fan in the inventive range hood and cooktops equipped with it becomes less soiled. This also applies to particularly critical parts of the fan, such as non-removable housing components. Thus, the invention makes it possible, for example, to achieve a better energy label rating with regard to grease reduction.Furthermore, if the blower can be cleaned, the associated cleaning effort is significantly reduced. The aforementioned advantages of the invention are particularly significant in the case of extractor hoods and cooktops equipped with them, where high extraction rates and thus high flow velocities of the fumes are achieved, for example, in certain operating conditions of the extractor hood. Thus, the invention allows for a higher flow rate per unit of time compared to the prior art, with essentially the same liquid and grease separation efficiencies, thereby improving the extraction result, i.e., the aforementioned extraction rate of fumes rising above the cooktop.

[0006] 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 is advantageously suitable for both household and commercial cooktops, i.e., cooktops for professional use. This applies in particular to the at least one baffle plate. For example, it is conceivable that at least one of the at least one baffle plate is designed as a separate component. However, it is expediently provided that the at least one baffle plate, preferably all baffle plates, are each designed as an integral part of the collection tray. This simplifies the design and manufacture of the extractor hood according to the invention. Furthermore, it reduces the number of components of the extractor hood according to the invention and thus the logistics and warehousing.Furthermore, for example, walls of the collection tray that are raised all around to form impact walls significantly increase the capacity of the collection tray.

[0007] An advantageous further development of the extractor hood according to the invention provides that the blower-side baffle extends so far from the collection tray towards the cooktop that it runs parallel to the grease filter for 1 / 4 to 1 / 3 of its height. This further improves the aforementioned separation, thus increasing the separation efficiency. At the same time, the disruption of the vapor flow caused by the blower-side baffle remains within acceptable limits.

[0008] A further advantageous embodiment of the extractor hood according to the invention provides that the grease filter, the collection tray, and the blower-side baffle are designed and arranged in such a way that the velocity of the underflow is so low in all operating states of the extractor hood that any liquid in the collection tray is not carried along by the underflow. In this way, a significant reduction in the amount of liquid carried downstream of the grease filter and the collection tray is achieved, for example, liquid from the collection tray carried along by the underflow.

[0009] Another advantageous embodiment of the extractor hood according to the invention provides that the grease filter is designed as a V-shaped grease filter, with the vapor inlet opening located in one base of the grease filter and one vapor outlet each in two opposing legs of the grease filter. This design results in a grease filter that is particularly simple in terms of construction and manufacturing, yet also highly effective. Furthermore, it promotes a very compact design for the extractor hood according to the invention. However, it is also conceivable that the grease filter could be shaped in other suitable and practical ways. For example, in contrast to the present embodiment, the grease filter in other embodiments of the extractor hood according to the invention could also have a U-shape in cross-section with a more or less pronounced transition between the two legs of the U.

[0010] A particularly advantageous embodiment of the extractor hood according to the invention provides that the grease filter is arranged in the extractor hood housing in such a way that airflow around the grease filter towards the fan is only possible in the form of an underflow between the grease filter and the collection tray. In this way, a defined and thus targeted flow-related design of the extractor hood according to the invention is enabled.

[0011] A further advantageous embodiment of the extractor hood according to the invention provides that, in addition to the blower-side baffle, a baffle furthest from the blower is arranged on the collection tray, positioned on the side of the grease filter facing away from the blower. Preferably, the baffle furthest from the blower is identical in design to the baffle furthest from the blower. This effectively prevents unwanted contamination of the extractor hood housing with liquid and grease, even on the side of the grease filter facing away from the blower. Furthermore, this preferred embodiment offers the additional advantage of simplifying the design and manufacture of the extractor hood according to the invention.

[0012] Another particularly advantageous embodiment of the extractor hood according to the invention provides that an odor filter is arranged in the extractor hood housing and downstream of the grease filter and the collection tray, preferably that the odor filter is arranged in the flow path between the grease filter and the fan. In this way, in addition to cleaning the fumes of grease and liquid, the removal of unpleasant odors from the fumes is also made possible. According to the preferred embodiment of this embodiment, the odor filter is expediently installed upstream of the fan.

[0013] Furthermore, a further advantageous embodiment of the extractor hood according to the invention provides that the grease filter and / or the odor filter are detachably arranged on the extractor hood 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 the odor filter on site, i.e., at the installation location of the cooktop.

[0014] Furthermore, an advantageous design feature provides that the drip tray is removable from the extractor hood. This allows, for example, liquids contained in the drip tray to be easily removed.

[0015] 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.

[0016] An embodiment of the invention is shown schematically in the drawing and is described in more detail below. It shows the single figure, Figure 1 shows an embodiment of the cooktop according to the invention with the extractor hood according to the invention in a partial, cutaway side view.

[0017] In the only Fig. 1 An embodiment of the cooktop according to the invention, together with the extractor hood according to the invention, is shown purely by way of example.

[0018] The cooktop 2 is designed as an induction cooktop and has a ventilation device 4 integrated into the cooktop 2.

[0019] The extractor hood 4 comprises an extractor hood housing 6 for arranging the extractor hood 4 below a cooktop 8 of the cooktop 2, a grease filter 12 arranged in the extractor hood housing 6 and connected to an extraction opening 10 of the cooktop 8 in a flow-conducting manner, a collection tray 14 for liquid 16 arranged in the extractor hood housing 6 below the grease filter 12 and the extraction opening 10, and a fan 18 arranged in the extractor hood housing 6 and in the direction of flow towards the grease filter 12 and the collection tray 14 for extracting fumes 20 rising above the cooktop 2, wherein the grease filter 12 has a fume inlet opening 22 connected to the extraction opening 10 in a flow-conducting manner for the entry of the fumes 20 into the grease filter 12 and two filter walls, each forming a filter wall. For the removal of fat contained in the steam 20 (not shown) from the steam 20, steam outlets 24 are formed,26 for the outlet of the vapor 20 from the grease filter 12, and wherein one vapor outlet 24 is arranged on a side of the grease filter 12 facing the blower 18 and the other vapor outlet 26 is arranged on a side of the grease filter 12 facing away from the blower 18, and wherein the grease filter 12 is arranged in the extractor hood housing 6 at a vertical distance from the collection tray 14 such that the vapor 20 exiting the grease filter 12 on the side facing away from the blower 18 can flow in an underflow between the grease filter 12 and the collection tray 14 in the direction of the blower 18.

[0020] According to the invention, at least one baffle 28, 30 is arranged on the collection tray 14 for separating liquid 16 and grease carried along in the steam 20, wherein one of the at least one baffle 30 is arranged as a blower-side baffle in a flow path of the steam 20 between the grease filter 12 on one side and the blower 18 on the other, and wherein a top surface of the blower-side baffle 30 facing the hob plate 8 has the same distance to the hob plate as or a smaller distance to the hob plate 8 than a bottom surface of the grease filter 12 facing the collection tray 14. Thus, the blower-side baffle 30 projects so far from the collection tray 14 towards the cooktop 8 that the top of the blower-side baffle 30 has a smaller distance to the cooktop 8 than a peak of the aforementioned underflow.This ensures that the vapor 20 flowing from the grease filter 12 towards the blower 18 comes into contact with the aforementioned blower-side baffle 30 for the purpose of separating any remaining liquid 16 and grease. The apex of the underflow is defined here as the point in the room closest to the collection tray through which the underflow passes. The aforementioned effective separation of grease and liquid 16 from the vapor 20 occurs because the largest proportion of the liquid 16 and grease contained in the grease filter 12 is located in the area of ​​the grease filter 12 closest to the collection tray. This also applies to any liquid 16 that may be present in the collection tray 14.

[0021] To achieve a very high extraction rate of fumes 20 above the cooktop 2, the flow velocities of the fumes 20 in the present embodiment are, at least partially and in certain operating states of the extractor hood 4, so high that, for example, liquid located in the grease filter 12 and / or in the collection tray 14 is carried along by the fumes 20. However, other embodiments of the invention are also conceivable in which the grease filter, the collection tray, and the blower-side baffle are designed and arranged in such a way that the velocity of the underflow is so low in all operating states of the extractor hood that liquid located in the collection tray is not carried along by the underflow.

[0022] The grease filter 12 is designed here as a V-shaped grease filter, with the vapor inlet opening 22 located in one base of the grease filter 12 and one of the vapor outlets 24, 26 each located in two opposite legs of the grease filter 12. Furthermore, the grease filter 12 is arranged in the extractor hood housing 6 such that airflow around the grease filter 12 towards the fan 18 is only possible in the form of an underflow between the grease filter 12 and the collection tray 14.

[0023] In the present embodiment, in addition to the blower-side baffle 30, a baffle 28 is arranged on the collection tray 14. This baffle is positioned on the side of the grease filter 12 facing away from the blower 18 and is thus designed as a baffle furthest from the blower. The baffle furthest from the blower 28 is identical in design to the baffle 30 on the blower side. The aforementioned baffles 28 and 30 are each formed as an integral part of the collection tray 14. To also increase the capacity of the collection tray 14, a portion of the surrounding wall of the collection tray 14 is raised to the height of both baffles 28 and 30.

[0024] For the purpose of removing odor substances contained in the fumes 20, an odor filter 32 is arranged in the extractor hood housing 6 and in the direction of flow after the grease filter 12 and the collection tray 14, wherein the odor filter 32 is arranged in the flow path between the grease filter 12 and the blower 18.

[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 12 and the odor filter 32 are detachably arranged on the extractor hood housing 6, so that the grease filter 12 and the odor filter 32 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] For the purpose of extracting vapors 20 rising above the cooktop 2, namely the cooktop plate 8, the cooktop plate 8 of the cooktop 2 has an extraction opening 10 which is connected to the vapor inlet opening 22 of the grease filter 12 of the extractor hood 4 in a flow-conducting manner. The cooktop plate 8 comprises a total of four cooking zones, which are not specified in more detail and are arranged on the cooktop plate 8 as usual. Of the four aforementioned cooking zones, 1 are shown in the plane of the image. Fig. 1 Two of the cooking zones are arranged to the left and right of the extraction opening 10. This ensures efficient extraction of steam 20 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 20 flow through the extractor hood 4 in a guided forced flow, whereby the entire fumes 20 are forcibly drawn first through the grease filter 12 and then through the odor filter 32 by means of the fan 18. The fumes 20, 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 18 into the surrounding environment via a flow connection (not shown).

[0030] Accordingly, the vapor 20 extracted above the cooktop 2 by means of the fan 18 enters the extractor housing 6 through the extraction opening 10 and first flows through the V-shaped grease filter 12. As can be seen from the Fig. 1 As can be seen, the vapor stream is not only freed from grease (not shown) by means of the grease filter 12, but is also simultaneously divided into two essentially equal partial streams, with one of the two partial streams in the image plane of the Fig. 1 on the left through the grease filter 12, namely through the vapor outlet 26, and the other of the two partial flows in the image plane of the Fig. 1 on the right through the grease filter 10, namely through the vapor outlet 24.

[0031] One partial flow of the vapor 20, which passes through the vapor outlet 24, can thus flow directly towards the odor filter 32 and the blower 18, while the other partial flow of the vapor 20, which passes through the vapor outlet 26, must first flow around the grease filter 12. In this process, the vapor 20 flows in the aforementioned underflow between the grease filter 12 and the collection tray 14 towards the odor filter 32 and the blower 18. Due to the high flow velocities that occur, at least partially, any liquid 16 present in the collection tray 14 may be carried along by this vapor 20. The same applies to any liquid 16 or grease adhering to the grease filter 12.This is harmless, however, because the liquid 16 and the grease carried along by the fumes 20 are largely and reliably separated from the fumes 20 by the blower-side baffle 30 and drain into the collection tray 14. The baffle 28 furthest from the blower functions analogously. As already explained above, the aforementioned good separation of grease and liquid 16 from the fumes 20 is achieved because the largest proportion of the liquid 16 and grease contained in the grease filter 12 is located in the area of ​​the grease filter 12 closest to the collection tray. This also applies to any liquid 16 that may be in the collection tray 14.

[0032] The vapor stream, divided in the aforementioned manner, is drawn through the odor filter 32 by means of the blower 18, whereby the vapor 20 enters essentially evenly distributed over the entire inlet area of ​​the odor filter 32 due to the division of the vapor stream into the two partial streams.

[0033] The vapor stream, thus cleaned of grease and odorous substances, enters the blower 18 in essentially equal proportions, so that the fan wheel of the blower 18 (not shown) is subjected to an essentially uniform flow.

[0034] As already explained, the cleaned fumes 20 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 by the extractor hood 4, be conveyed into the surrounding environment by the fan 18 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 such that it can be used 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 adjustment is made to the extractor hood 4 directly on site during the installation of the hob 2.

[0035] Due to the inventive design of the extractor hood 4 and the cooktop 2, the fumes 20 downstream of the grease filter 12 and the drip tray 14 are significantly better cleaned of grease and entrained moisture, such as water, so that less grease and moisture reach the odor filter 32 and the fan 18. Accordingly, the odor filter 32 and the fan 18 of the extractor hood 4 and the cooktop 2 equipped with it become less soiled. This also applies to particularly critical parts of the odor filter 32, for example, the activated carbon contained in the odor filter 32 as an odor-binding substance, and of the fan 18, for example, non-removable housing components of the fan 18. Thus, it is possible, for example, to achieve a better label rating with regard to grease reduction using the invention.Furthermore, if the blower 18 can be cleaned, the associated cleaning effort is significantly reduced. The aforementioned advantages of the invention are particularly significant in the case of the extractor hood 4 and the cooktop 2 equipped with it in the present embodiment, since high extraction rates and thus high flow velocities of the fumes 20 are achieved here, for example, in certain operating states of the extractor hood 4. Thus, the invention allows, with essentially the same liquid and grease separation efficiencies, a higher conveying volume per unit of time compared to the prior art, so that the extraction result, i.e., the aforementioned extraction rate of fumes 20 rising above the cooktop 2, is improved.

[0036] The odor filter 32, with its odor-eliminating substance, such as the aforementioned activated carbon contained within the odor filter 32, becomes less soiled, thus enabling a longer service life for the odor filter 32. The odor filter 32 needs to be replaced less frequently, which also reduces the environmental impact.

[0037] The invention is not limited to the present embodiment, but is defined by the accompanying claims. 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) which can be integrated structurally into the cooking hob (2), comprising an extractor hood device housing (6) for arranging the extractor hood device (4) below a cooking hob plate (8) of the cooking hob (2), a grease filter (12) arranged in the extractor hood device housing (6) and connected in a flow-conducting manner to an extraction opening (10) of the cooking hob plate (8), a drip tray (14) for liquid (16) arranged in the extractor hood device housing (6) below the grease filter (12) and the extraction opening (10), and a fan (18) arranged in the extractor hood device housing (6), downstream of the grease filter (12) and the drip tray (14) in the flow direction, for extracting vapours (20) rising above the cooking hob (2), the grease filter (12) having a vapour inlet opening (22), connected to the extraction opening (10) in a flow-conducting manner, for the vapours (20) to enter the grease filter (12), and two vapour outlets (24, 26), each designed as a filter wall for removing grease contained in the vapours (20) from the vapours (20), for the vapours (20) to exit the grease filter (12), and one vapour outlet (24) being arranged on a side of the grease filter (12) that faces the fan (18) and the other vapour outlet (26) being arranged on a side of the grease filter (12) that faces away from the fan (18), and the grease filter (12) being arranged in the extractor hood device housing (6) at a vertical distance from the drip tray (14) such that the vapours (20) escaping from the grease filter (12) on the side of the grease filter (12) that faces away from the fan (18) can flow in an underflow between the grease filter (12) and the drip tray (14) towards the fan (18), characterised in that at least one impact surface (28, 30) is arranged on the drip tray (14) for separating liquid (16) and grease carried along in the vapours (20), one of the at least one impact surface (28, 30) being arranged as a fan-side impact surface (30) in a flow path of the vapours (20) between the grease filter (12) on one side and the fan (18) on the other side, and an upper side of the fan-side impact surface (30) that faces the cooking hob plate (8) having the same distance from the cooking hob plate (8) as, or a smaller distance from the cooking hob plate (8) than, an underside of the grease filter (12) that faces the drip tray (14).

2. Extractor hood device (4) according to claim 1, characterised in that the fan-side impact surface (30) rises so far towards the cooking hob plate (8) from the drip tray (14) that the fan-side impact surface (30) extends in parallel with the grease filter (12) over 1 / 4 to 1 / 3 of the height of the grease filter (12).

3. Extractor hood device according to claim 1 or 2, characterised in that the grease filter, the drip tray and the fan-side impact surface are designed and arranged in a manner tailored to one another such that the velocity of the underflow is so low in all operating states of the extractor hood device that any liquid in the drip tray is not carried away by the underflow.

4. Extractor hood device (4) according to any of claims 1 to 3, characterised in that the grease filter (12) is designed as a V-shaped grease filter, the vapour inlet opening (22) being located in a base of the grease filter (12) and one of the vapour outlets (24, 26) being located in each of two opposite legs of the grease filter (12).

5. Extractor hood device (4) according to any of claims 1 to 4, characterised in that the grease filter (12) is arranged in the extractor hood device housing (6) such that a flow around the grease filter (12) towards the fan (18) is only possible in the form of the underflow between the grease filter (12) and the drip tray (14).

6. Extractor hood device (4) according to any of claims 1 to 5, characterised in that, in addition to the fan-side impact surface (30), a fan-remote impact surface (28) positioned on the side of the grease filter (12) that faces away from the fan (18) is arranged on the drip tray (14), preferably in that the fan-remote impact surface (28) is designed identically to the fan-side impact surface (30).

7. Extractor hood device (4) according to any of claims 1 to 6, characterised in that an odour filter (32) is arranged in the extractor hood device housing (6), downstream of the grease filter (12) and the drip tray (14) in the flow direction, preferably in that the odour filter (32) is arranged in the flow path between the grease filter (12) and the fan (18).

8. Extractor hood device (4) according to any of claims 1 to 7, characterised in that the grease filter (12) and / or the odour filter (32) is / are detachably arranged on the extractor hood device housing (6) such that the relevant filter can be cleaned and / or replaced on site.

9. Extractor hood device (4) according to any of claims 1 to 8, characterised in that the drip tray (14) is designed to be removable from the extractor hood device (4).

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

11. Cooking hob (2) according to claim 10, characterised in that the extractor hood device (4) is arranged in the cooking hob (2) such that the grease filter (12) and / or the odour filter (32) can be cleaned and / or replaced on site.

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