EP2444739A2 - Fumes extraction device with a rotatable air flow - Google Patents

Abstract

The mechanism has a glass ceramic cooking zone, and suction device (8) for suctioning vapor. An exhaust device (9) comprises cylindrical elements (17-20) and outlet nozzles that are directed in a preset rotation direction for producing a swirling air stream. The outlet nozzles are vertically/horizontally oriented in a mounted state of the exhaust device. The suction device comprises a suction opening (15) that is arranged above a cooking region (24), in which vapor is produced during cooking, and another suction opening (16) arranged below the region, where the openings face each other.

Description

Technical area

The invention relates to a fume extraction device, in particular a fume extraction device for stoves, as they are used in households. Specifically, the invention relates to the field of extractor devices for electric stoves and gas stoves.

State of the art

From the JP 02195139 A is known an extractor fan. In the known extractor four pipes are arranged around a discharge hopper, which emit air above a cooktop below the discharge hopper for generating a rotating air flow. The generated rotating air flow is then sucked off.

From the DE 10 2004 062 863 A1 For example, an apparatus for removing a gaseous or gaseous fluid from a building space is known. In this case, two suction openings arranged at such a horizontal distance from one another are provided, that at a predetermined volumetric flow of the fluid in the suction openings between them, a fluid vortex occurs, in which the fluid flows in a rotary manner to the suction openings. In this case, the device is arranged at a predetermined height above that of a plurality of fluid sources, such as cooking appliances or fireplaces, the highest-reaching fluid source, so that there is a free space between the fluid sources and the device. The distance and the volume flow in the suction openings are matched to one another such that the fluid vortex between the suction openings without a guide element or a guide element enclosing it predominantly is free in the building space.

Presentation of the invention

The object of the invention is to provide a fume extraction device which has an improved suction effect.

The object is achieved by a fume extraction device, which is used in particular for stoves, wherein a suction device, which serves for sucking a Wrasens, and an outflow device, which serves for generating a rotating air flow, are provided, wherein the suction device has a first suction opening and at least one second suction opening and wherein the first suction opening and the second suction opening are arranged opposite to each other.

The measures listed in the dependent claims advantageous refinements of the extractor device according to the invention are possible.

By means of the suction openings arranged at the ends of the generated vortex a radial negative pressure area can be generated. Around this central negative pressure area, a preferably tangential flow is generated by means of the outflow device. The superposition of the tangential circulating flow and the directed flow to the center of the negative pressure area creates an air vortex, which continues automatically in the direction of the suction openings. The resulting air vortex is able to absorb the vapors produced during cooking, for example, and to transport them over a certain distance. Thus, the vortex from the rotating air flow and the Wrasen is effectively fixed on both sides via the suction openings. This results in the advantage that the proportion of unrecognized Wrasens or the proportion of escaping Wrasens are reduced. As a result, the suction effect of the extractor device is improved. The generated vortex can hereby be designed as an artificial mini tornado.

It is advantageous that the discharge device has slot-shaped outlet nozzles, which are directed in a predetermined direction of rotation for the generation of the rotating air flow. In this case, it is also advantageous that the slot-shaped outlet nozzles of the outflow device are each oriented at least approximately vertically or horizontally in the mounted state of the outflow device. As a result, an advantageous rotating air flow can be generated, which virtually rotates about a vertical or horizontal axis. The horizontal negative pressure area, which is generated by the suction device with the two suction openings, is then also oriented vertically or horizontally.

Advantageously, the suction openings at the edge of a cooking area in which the Wrasen is generated when cooking is arranged. In this way, the suction can be as close as possible to the cooking area, so that the expansion of the negative pressure area for generating the minitornado (vortex) is relatively small, without restricting the cooking area, so that the vapors produced during cooking in the cooking area is largely or at least trapped to a large extent ,

It is also advantageous that the first suction opening above the cooking area, in which the vapor is generated during cooking, is arranged and that the second suction opening is arranged below the cooking area. Specifically, in this case the second suction opening can be provided between hotplates and / or in the middle of a hob with a plurality of hotplates and / or in the middle of a glass ceramic hob. The cooktop or the glass ceramic cooktop are suitably configured or modified to allow the suction. Specifically, the lower suction opening may in this case be provided with a grid, be covered by a plurality of grid-like arranged struts or otherwise partially covered in order to prevent a falling in of food and other things.

However, it is also advantageous that the first suction opening is arranged on a first side of the cooking area in which the vapor is produced during cooking, and that the second suction opening is arranged on a second side of the cooking area opposite the first side. As a result, air can be sucked out on both sides of the cooking area in order to produce a horizontal or horizontal vacuum area. The resulting vortex, via which the vapor can be absorbed and transported, is then oriented at least approximately horizontally. This embodiment has the advantage that the arrangement of the suction openings can be adjusted in height via a hob or the like to the respective application. Optionally, a variable, that is adjustable in height, configuration is possible.

Here, it is further advantageous that the first suction opening is provided on a curved first suction tube, that the second suction opening is provided on a curved second suction tube, that the first suction tube is bent so that the first suction opening is directed to the cooking area, and that the second suction pipe is bent so that the second suction opening is directed to the cooking area. Here, it is also advantageous that the first suction tube as at least approximately L-shaped first suction tube is configured and that the second suction tube is formed as at least approximately L-shaped second suction tube. As a result, a compact design is possible, in which the suction tube exits, for example, from a working surface first vertically upwards and then bent in the upper region L-shaped to the cooking area.

It is advantageous that the suction openings are arranged at least approximately at the ends of a vortex which can be generated from the rotating air flow and the vapor. The suction device preferably has two suction openings. However, it is also possible that more than two suction openings are provided.

Brief description of the drawings

Fig. 1

eine Dunstabzugsvorrichtung in einer auszugsweisen, schematischen, räumlichen Darstellung entsprechend einem ersten Ausführungsbeispiel der Erfindung und

Fig. 2

eine Dunstabzugsvorrichtung in einer auszugsweisen, schematischen, räumlichen Darstellung entsprechend einem zweiten Ausführungsbeispiel der Erfindung.

Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with corresponding reference numerals. It shows:

Fig. 1

an extractor device in a partial, schematic, spatial representation according to a first embodiment of the invention and

Fig. 2

a fume extractor in a partial, schematic, spatial representation according to a second embodiment of the invention.

Preferred embodiments of the invention

Fig. 1 shows a fume extractor 1 in a partial, schematic, spatial representation according to a first embodiment of the invention. The extractor device 1 is used in particular for cookers 2, which may be configured as electric stoves 2 or as a gas-powered stoves. In this embodiment, the stove 2, a hob 3, on which one or more cooking zones 4, 5, 6, 7 are provided. The hob 3 may be configured, for example, as a glass ceramic hob 3. However, the extractor device 1 of the invention is also suitable for other applications, in particular, it can be used for an electric or gas-operated grill.

The extractor device 1 has a suction device 8 and an outflow device 9. Here, a housing 10 is provided, are integrated in the appropriately designed blower. Further, an exhaust pipe 11 is connected to the housing 10.

The suction device 8 has a first suction opening 15 and a second suction opening 16. The outflow device 9 has cylindrical elements 17, 18, 19, 20, which are connected to the housing 10 in this embodiment. The cylindrical elements 17 to 20 extend in this embodiment of the housing 10 from vertically downwards. Slot-shaped outlet nozzles 21, 22 are provided on the cylindrical elements 17 to 20. In this case, the slot-shaped outlet nozzles 21, 22 are visible on the cylindrical elements 18, 19, while slot-shaped outlet nozzles are also provided on the cylindrical elements 17, 20, but are concealed in the drawing and thus not shown. In operation, air flows through the slot-shaped outlet nozzles 21, 22 of the cylindrical elements 17 to 20, so that a rotating air flow is generated. This rotating air flow is superimposed with a negative pressure region generated via the suction device 8, whereby a vortex in the form of an artificial mini tornadoes is produced.

The first suction opening 15 is provided on an underside 23 of the housing 10. The second suction opening 16 is provided in the middle of the hob 3. In this case, the second suction opening 16 is in the plane of the hob 3 between the cooking zones 4 to 7. From the second suction opening 16, a suitable tube is guided to a fan or the like. It is also possible that this tube leads to the exhaust pipe 11 1.

The two suction openings 15, 16 face each other. In this case, the suction openings 15, 16 face each other. Between the bottom 23 and the hob 3, a cooking area 24 is provided in which a vaporizing is generated during cooking. The term of cooking is to be understood here in general and includes, for example, in the case of a grill device also a barbecue of food, especially meat. The two suction openings 15, 16 are thus at the edge of the cooking area 24, namely in this embodiment, above and below the Cooking area 24.

Through the central suction opening 15 above the cooking area 24 and the central second suction opening 16 below the cooking area 24, a central axial negative pressure area is generated whose normal vector is oriented perpendicular to the cooking surface level 25 of the hob 3. A tangential flow is generated around this central negative pressure area by means of the slot-shaped outlet nozzles 21, 22 of the cylindrical elements 17 to 20. The superimposition of this tangential circulating flow, that is the rotating air flow, and the directed flow to the center of the negative pressure area creates an air vortex, which continues independently in the direction of the two suction openings 15, 16. The resulting air vortex is able to absorb the vapors produced during cooking and to transport them into the two suction openings 15, 16. Thus, a vortex can be generated from the rotating air flow and the vapor, which at least largely encloses the vapors and transported away via the suction openings 15, 16. The suction openings 15, 16 are arranged at the ends of the vortex generated from the rotating air flow and the vapor.

Thus, on the one hand the vapors are reliably detected and transported away. Furthermore, by using the flow phenomenon of the minitornado (vortex), the vapor is used as an optical feature of the kitchen appliance with the extractor device 1.

In the in the Fig. 1 illustrated embodiment, the slot-shaped outlet nozzles 21, 22 are oriented vertically to the cylindrical elements 17 to 20.

Fig. 2 shows a fume extractor 1 in a partial, schematic, spatial representation according to a second embodiment of the invention. In this embodiment, cylindrical elements 18, 19 of the outflow device 9 are provided, which are connected to each other via a suitable construction 25 and suspended. The supply of air takes place in a suitable manner. The slot-shaped outlet nozzle 21 of the cylindrical element 18 is oriented vertically downwards. The slot-shaped outlet nozzle 22 of the cylindrical element 19 is oriented horizontally in the direction of the cylindrical element 18. The orientations result here in the assembled state of the construction 25. In the assembled state, the underside 23 of the construction 25 is determined, wherein the cooking area, in the the vapor is generated during cooking, is limited at the height of the bottom 23 upwards. In particular, the underside 23 of the construction 25 with the cylindrical elements 18, 19 is preferably located clearly above the space in which pots or the like are located during cooking.

The suction device 8 has in this embodiment, two suction openings 15, 16, which are arranged from the user on the left side and the right side of the cooking area. The suction openings 15, 16 lie opposite each other and are directed towards each other. Here, on the one hand, the smallest possible distance between the suction openings 15, 16 is achieved without, on the other hand, the space for cooking, in particular for pots or the like, is limited. The first suction opening 15 is provided in this embodiment on a curved first suction pipe 26. The second suction opening 16 is provided on a bent second suction tube 27. Here, the two exhaust pipes 26, 27 are bent towards each other in their upper regions 28, 29. Thus, the two suction tubes 26, 27 are bent in their upper regions 28, 29 in each case in the direction of the cooking region 24. The two suction tubes 26, 27 are designed as L-shaped suction tubes 26, 27. Here, the suction tubes 26, 27 extend in their lower regions 30, 31 vertically upwards from a worktop 32 or the like. Optionally, a height adjustment can be realized, so that the two suction openings 15, 16 either closer to the hob 3, that is, down, or closer to the bottom 23 of the structure 25, that is, can be adjusted upwards.

In order to generate the rotating air flow, a further slot-shaped outlet nozzle 35 is arranged behind the hob 3 on the worktop 32 as seen by the user in this exemplary embodiment. The slot-shaped outlet nozzle 35 is in this case oriented vertically upwards. Thus, the slot-shaped outlet nozzle 35 is directed at least approximately in the direction of the cylindrical element 19. In operation, the outflow device 9 with the slot-shaped outlet nozzles 21, 22, 35 generates a rotating air flow, which in this exemplary embodiment rotates, as it were, about a horizontal axis. In addition, the suction device 8 generates a radial, horizontal (horizontal) negative pressure region through the two suction openings 15, 16 arranged on the left and right of the hob 3. Around this central negative pressure area, the rotating air flow is generated via the outflow device 9. The superimposition of the tangential circulating flow (rotating Air flow) and the directed flow to the center of the negative pressure area generates an air vortex, which continues independently in the direction of the suction openings 15, 16. The resulting air vortex is able to absorb the vapors produced during cooking and to transport them over a certain distance. Thus, a vortex is generated during cooking from the rotating air flow and the vapor, which at least largely absorbs the vapors and transported away via the suction device 8.

Thus, a good detection of Wrasens is achieved by the use of the flow phenomenon of a mini tornado. In addition, the vapor can be used as an optical feature. Since the two suction tubes 26, 27 can be guided for example by circular cutouts in the work surface 32, the extractor device 1 of the second embodiment is also suitable for a variety of conventional ovens 2. Specifically, no adaptation of the hob 3 is required. The slot-shaped outlet nozzle 35 can be inserted in an advantageous manner behind the hob 3 in the worktop 32. For this purpose, for example, a suitable cutout can be provided at the rear end of the worktop 32. Furthermore, the construction 25 allows a relatively filigree design, which obstructs the view much less than a conventional extractor device with downwardly open metal funnel or the like.

The invention is not limited to the described embodiments.

LIST OF REFERENCE NUMBERS

1

Exhaust hood

2

stove

3

hob

4 - 7

cooking

8th

suction

9

discharge means

10

casing

11

exhaust pipe

15

first suction opening

16

second suction opening

17 - 20

cylindrical element

21, 22

slit-shaped outlet nozzle

23

bottom

24

cooking area

25

construction

26

first suction tube

27

second suction tube

28, 29

upper area

30, 31

lower area

32

countertop

35

slit-shaped outlet nozzle

Claims (10)

Vapor extraction device (1), in particular for stoves, with a suction device (8), which serves for sucking off a vapor, and an outflow device (9), which serves to generate a rotating air flow,
characterized,
in that the suction device (8) has a first suction opening (15) and at least one second suction opening (16), and in that the first suction opening (15) and the second suction opening (16) are arranged opposite one another. Vapor extraction device according to claim 1,
characterized,
in that the outflow device (9) has slot-shaped outlet nozzles (17 - 20, 35) which are directed in a predetermined direction of rotation for generating the rotating air flow. Vapor extraction device according to claim 2,
characterized,
that the slit-shaped outlet nozzles (17-20, 35) of the exhaust means in the mounted state of the exhaust means (9) are each at least approximately perpendicularly oriented. Vapor extraction device according to claim 2,
characterized,
that the slit-shaped outlet nozzles (17-20, 35) of the exhaust means in the mounted state of the exhaust means (9) are each at least approximately horizontally oriented. Vapor extraction device according to one of claims 1 to 4,
characterized,
in that the suction openings (15, 16) are provided for placement on the edge of a cooking area in which the vapor is produced during cooking. Vapor extraction device according to one of claims 1 to 5,
characterized,
in that the first suction opening (15) is arranged above a cooking area (24) in which the vapor is produced during cooking, and in that the second suction opening (16) is arranged below the cooking area (24). Vapor extraction device according to claim 6,
characterized,
that the second suction opening (16) between the cooking points (4 - 7) and / or at least approximately in the center of a cooking hob (3) having a plurality of burners (4 - 7) and / or at least approximately in the center of a glass ceramic hob (3) is provided , Vapor extraction device according to one of claims 1 to 5,
characterized,
in that the first suction opening (15) is arranged on a first side of a cooking area (24) in which the vapor is produced during cooking, and in that the second suction opening (16) is arranged on a second side of the cooking area (24) opposite the first side is. Vapor extraction device according to claim 8,
characterized,
in that the first suction opening (15) is provided on a curved first suction pipe (26), that the second suction opening (16) is provided on a bent second suction pipe (27), that the first suction pipe (26) is bent such that the first suction pipe (26) is bent Suction opening (15) is directed to the cooking area (24), and that the second suction pipe (27) is bent so that the second suction opening (16) is directed to the cooking area (24). Vapor extraction device according to claim 9,
characterized,
that the first suction tube (26) as an at least approximately L-shaped first suction pipe (26) is arranged and that the second suction tube (27) as an at least approximately L-shaped second suction pipe (27) is arranged.

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