EP2112437B1 - Vapour extraction device with vapour guide plate - Google Patents

Description

The invention relates to a fume extractor with at least one Wrasenleitblech.

In extractor devices, in particular extractor hoods, it is known to cover the suction of the hood with a baffle plate as far as possible. In this case, the suction of contaminated air into the extractor device takes place via a gap formed on the edge of the baffle plate between the baffle plate and the extractor hood, in particular the extractor hood. After passing through the contaminated air or Wrasens through the gap, this passes to a behind the baffle plate, for example, in or behind the suction, attached grease filter, are removed from the impurities from the vapors and fumes. In these extractor hoods, the baffle plate is mounted in a fixed position in front of the suction opening.

In addition, for example, from the DE 25 08 954 A1 an extractor hood, which has a box-shaped housing, the front panel is pivotable forward about an upper edge by an angular range. In the front of the case, a grease filter is provided. Likewise is in GB 2 147 990 A a blower unit having a front wall in which an inlet opening and an outlet opening is provided. On the front wall a flap is attached via hooks. The flap is moved down the front wall for operation of the blower unit and pivoted forward about a horizontal axis at the top of the flap.

It is also known to provide Hunstabzugshaben with a filter unit having a closed airtight underside and on the sides of filter surfaces are provided. Such a filter unit is for example in EP 1 798 482 A2 described. In this hood, the filter unit is brought from a rest position in which closes the bottom of the filter unit, the suction opening of the hood in an operating position. In the operating position, the side surfaces of the filter unit, can pass through the vapors and steam into the interior of the hood and be cleaned on filter surfaces can be accessed for fumes and vapors which flow to the extractor hood. A disadvantage that brings such a known filter unit with it, is the required height of the filter unit. In order to be able to provide a sufficiently large filter surface over which vapors and fumes can be freed of impurities, the filter unit must have a large height. The visual appearance of the extractor device in the operating position of the filter unit is thereby significantly deteriorated. In addition, the sight hood of the extractor hood, in which the filter unit must be taken in the rest position, must also have a sufficient height. As a result, the entire impression of the extractor hood is deteriorated. Finally, the weight of the filter unit is considerable due to the required high altitude. In the extractor device, however, in order to achieve the desired filter performance, the entire filter unit must be moved. Thus, the demands on the attachment and movement mechanisms by which the filter unit is held and moved are increased.

The object of the present invention is therefore to provide a fume extraction device with which, on the one hand, a sufficient filter surface in the operating position and, on the other hand, a minimum overall height of the filter unit of the fume extractor can be provided.

The invention is based on the finding that this object can be achieved by a filter element of the filter unit is provided separately to devices for guiding the vapors and steam and can be moved separately for this purpose.

The object is therefore achieved according to the invention by a vapor extraction device which comprises a suction opening, a filter element and at least one Wrasenleitblech. The extractor device is characterized in that the Wrasenleitblech is arranged so that it is movable relative to the filter element, the Wrasenleitblech in a rest position closes a suction of the suction and the Wrasenleitblech is mounted so that this in a direction perpendicular to the surface of the suction opening can be moved.

The extractor device according to the present invention is an extractor hood. Preferably, the extractor device is a dining, for example an island fair or a Wandesse. Furthermore, the extractor device according to the present invention may be a so-called tray ventilation device. These extractor devices are arranged next to or behind the hob and have a vertical orientation. In particular, the suction opening is vertically aligned in these extractor devices. The suction opening is the area of the extractor device, can enter through the vapors and fumes into the interior of the extractor device. Especially with food, this suction opening is usually provided in a viewing hood of the extractor device. The filter element of the extractor device may be provided in or behind the suction opening. The filter element may be, for example, a filter cassette made of expanded metal or expanded metal. The suction area is the part of the area of the suction opening which corresponds to the projection of the Wrasenleitblechs, which is in an operating position on this area. For the purposes of the invention, a suction area is considered to be assigned to a vapor guide plate when it closes off the suction area in the rest position. The Wrasenleitblech is referred to below as a baffle plate. The Wrasenleitblech consists of an air-impermeable material and preferably has a flat surface.

By in the extractor device according to the invention the Wrasenleitblech is arranged movable relative to the filter element and thus also to the suction opening of the extractor device, this can be moved independently of the filter element and placed in a desired position. In a so-called rest position, the Wrasenleitblech closes the this associated suction of the suction. Closure is understood in the context of the invention to cover the respective region of the suction opening, by which the entry of fumes and vapor into the extractor device is prevented. In addition, the closure prevents the escape of odors and air from the extractor device. The latter is particularly important in so-called exhaust hoods, since in these extractor devices, the interior of the extractor device is connected to the environment and thus air can enter from outside into the room in which the extractor device is operated. Finally, an extractor device, in which the suction opening is closed in a rest position, has the advantage that the surfaces of the extractor device can be easily cleaned.

By moving the Wrasenleitbleches relative to the filter element and thus relative to the suction opening from the rest position out into an operating position, at least a portion of the suction for fumes and vapors can be made accessible.

In contrast to the prior art, in the present invention, only the movement of the Wrasenleitbleches required to put the extractor device in an operating condition. The movement of an entire filter unit, as is necessary in the prior art, can be dispensed with in the present invention.

Preferably, the filter element completely covers the suction opening of the extractor device. This can be done by arranging the filter element in the suction or behind the suction. In the case of the extractor device according to the invention, the entire area of the suction opening or at least of the suction area assigned to a vapor plate is thus available for the cleaning of vapors and steams. Compared to the prior art, in which the cleaning of the vapors and fumes could be done only on the side walls of the filter unit, therefore, the cleaning efficiency of the extractor device according to the invention is improved.

Preferably, the surface of the Wrasenleitblechs the surface of the suction corresponds to this is assigned. If only one vapor guide plate is provided, then its area preferably corresponds to the area of the suction opening. In an extractor hood or dining the suction opening is formed by an opening in the viewing hood. Here then the size of the Wrasenleitbleches is the size of the opening in the viewing hood. By this configuration, the suction opening can be completely covered by the Wrasenleitblech in the rest position and thereby closed. If there are several Wrasenleitbleche, so their size is in each case such that the suction opening in the state in which all Wrasenleitbleche are in the rest position, completely closed.

If several Wrasenleitbleche provided, the suction, which is assigned to the individual Wrasenleitblechen, preferably by a frame defined, which is arranged in or in front of the suction opening. In the rest position, the Wrasenleitbleche then form a smooth surface with the frame.

Particularly preferably, the Wrasenleitblech is in the rest position on the filter element in the suction. In the case of a flat, flat Wrasenleitblech and a flat planar filter element here is the top of the Wrasenleitblechs on the underside of the filter element. As a result, the space requirement is minimized. Even with a viewing hood, in which the filter element and the Wrasenleitblech are to be fully absorbed in the rest position, the required height of the viewing hood is therefore minimal.

According to a preferred embodiment, the Wrasenleitblech is mounted so that it can be moved in a direction perpendicular to the surface of the suction opening. For food or extractor hoods, in which the suction opening is horizontal, the Wrasenleitblech is stored so that it can be moved downwards from the suction opening. In contrast, in the case of depression ventilation devices, the direction of movement of the Wrasenleitbleches is preferably horizontal. By such a movement, the Wrasenleitblech is in the operating position parallel under or in front of the suction opening. In this position, vapors and steam are passed along the Wrasenleitblech along its edge and can get there via the gap between the Wrasenleitblech and the boundary of the suction to the suction. In general, the suction opening is arranged in a viewing hood, so that the gap through which the suction can take place between the Wrasenleitblech and the viewing hood.

According to a further embodiment, the extractor device comprises at least two Wrasenleitbleche, each associated with a suction of the suction opening. This makes it possible to achieve a targeted extraction. If, for example, two Wrasenleitbleche provided in a cooker hood or dining, so that a Wrasenleitblech two hotplates, for example, the rear burners of a cooker, and the other Wrasenleitblech two other hotplates, for example, the front burners of a cooker be assigned. However, it is also possible according to the invention for the number of vapor guide plates to correspond to the number of cooking zones of a cooker, which is operated under the extractor device. In the latter case, a single cooker extraction is realized.

According to one embodiment, the Wrasenleitblech is mounted on the extractor device, that this can be moved manually. Here, for example, a fixing movement mechanism can be used, in which by a first application of a compressive force, a holder is released and the Wrasenleitblech is brought, for example by means of spring force from the rest position to the operating position. When applying a further pressure force on the Wrasenleitblech in the operating position, the holder of the Wrasenleitblechs is then brought into their original position and held the Wrasenleitblech in the rest position. This attachment movement mechanism is also referred to as a push-push principle. The advantage of this mechanism is that an intervention between the Wrasenleitblech and the frame in which this is held by the user is not required. As a result, the distance between Wrasenleitblech and the frame can be minimized and so reliable cover the suction through the Wrasenleitblech be ensured in the rest position.

According to a further embodiment, the Wrasenleitblech is mounted on the extractor device, that this can be moved by means of an electrical control between the rest position and the operating position. The electrical control can be integrated in the control of the extractor device or connected to this. As a result, for example, when switching on the fan of the extractor device or when selecting a specific fan level, the displacement of the or the Wrasenleitbleche be effected in the operating position.

Figur 1:

eine schematische Schnittansicht eines Teils einer Dunstabzugsvorrichtung mit einem Wrasenleitblech in Ruheposition;

Figur 2:

eine schematische Schnittansicht des Teils der Dunstabzugsvorrichtung nach Figur 1 mit dem Wrasenleitblech in Betriebsposition;

Figur 3:

einen schematischer Vergleich zum Stand der Technik; und

Figuren 4a, 4b und 4c:

schematische Darstellungen von drei Ausführungsformen von Wrasenblechen.

The invention will be described again below with reference to the accompanying figures. Show it:

FIG. 1:

a schematic sectional view of part of a fume extraction device with a Wrasenleitblech in rest position;

FIG. 2:

a schematic sectional view of the part of the extractor device according to FIG. 1 with the Wrasenleitblech in operating position;

FIG. 3:

a schematic comparison to the prior art; and

FIGS. 4a, 4b and 4c:

schematic representations of three embodiments of Wrasenblechen.

In FIG. 1 is a schematic view of the edge of a fume extractor 1 is shown, which represents an extractor hood in the form of a forge. The extractor device 1 comprises a viewing hood 11 and a chimney 12 arranged above the viewing hood 11. In the viewing hood 11, a suction opening 111 is provided on the underside. The suction opening 111 is surrounded by the frame 112 of the viewing hood 11. In the illustrated embodiment, the suction opening 111 is covered by a filter element 2. The filter element 2 is in the illustrated embodiment, a filter cartridge with expanded metal filter layers.

Below the filter element 2, a Wrasenleitblech 3 is arranged, which is also referred to below as a baffle plate. The Wrasenleitblech 3 is in the FIG. 1 shown in the rest position. In this position, the Wrasenleitblech 3 is completely retracted or retracted into the frame 112 of the viewing hood 11. The underside of the Wrasenleitblechs 3 is thus flush with the underside of the frame 112 of the viewing hood 11. In this state, the bottom of the viewing hood 11 thus forms a continuous flat surface.

The Wrasenleitblech 3 is in the rest position shown on the underside of the filter element 2. But it can also be provided that between the bottom of the filter element 2 and the top of the Wrasenleitblechs 3 there is a gap.

In the rest position of Wrasenleitblechs 3 thus neither air, especially contaminated air such as fumes, penetrate from the outside into the extractor device 1 still air, especially odors, for example, from the filter element 2, from the extractor device 1 to the outside.

If the extractor device 1 is put into operation, so the Wrasenleitblech 3 in the in the FIG. 2 brought shown operating position. The movement from the rest position to the operating position can take place automatically or manually by the user of the extractor device 1. In the operating position, the Wrasenleitblech 3 relative to the filter element 2 and thus relative to the suction opening 111 is displaced downwards. As a result, there is a gap S between the underside of the frame 112 of the viewing hood 11 and the top of the Wrasenleitblechs 3. About this gap, which is present along the entire edge of the Wrasenleitblechs 3, fumes and vapor can be sucked into the fume extractor 1 and the filter element getting cleaned. The Wrasenleitblech 3 is parallel to the filter element 2 is moved downward, so that the size of the gap S over the entire circumference of the Wrasenleitblechs 3 is the same.

Due to the movable attachment of the Wrasenleitblechs 3 to the extractor device 1, the required height of the viewing hood and the filter element 2 is minimized with the Wrasenleitblech 3. In FIG. 3 is a comparison between the embodiment of the extractor device according to Figures 1 and 2 and the prior art shown schematically. The dimensions of the components of the extractor device 1 of the prior art are indicated by the dashed lines. For a fixed Wrasenleitblech 3, the height H _SdT the viewing hood 11 must be larger. This greater height is due to the fact that in the extractor device 1 according to the prior art, the Wrasenleitblech 3 should not be directly visible to the user. The Wrasenleitblech 3 is located according to the prior art but always at a distance from the filter element 2, so that the height of the viewing hood 11 must be increased by this distance. In addition, the size of the Wrasenleitblechs 3 must be lower in the prior art. Due to the fixed position of the Wrasenleitblechs 3, the gap, which is required for Randabsaugung of vapors and fumes, be given between the inside of the frame 112 of the viewing hood 11 and the outer edge of the Wrasenleitblechs 3. Through this always present slot or gap, however, it can lead to an undesirable escape of odors and air from the extractor device 1. In addition, the underside of the viewing hood 11 interrupted by the gap even in the rest position, so that the visual appearance deteriorates and the cleaning is difficult.

Compared to the required height H _{SdT of} the viewing hood of the prior art, the required height H of the viewing hood 11 is significantly reduced in the extractor device 1 according to the invention.

In the FIGS. 4a . 4b and 4c schematic perspective bottom views of different embodiments of the viewing hood 11 are shown. In the embodiment according to FIG. 4a If only one Wrasenleitblech 3 is provided that in the frame 112 of the viewing hood 11 is added. When lowering or moving the Wrasenleitblechs 3 from the rest position to the operating position takes place in this embodiment, a suction over the entire edge of the Wrasenleitblechs 3 and thus over the entire surface of which is located behind the Wrasenleitblechs 3 filter element. 2

In FIG. 4b a further embodiment of the viewing hood 11 is shown in a schematic perspective bottom view. In this embodiment, two Wrasenleitbleche 3 are provided in the frame 112 of the viewing hood 11. These two Wrasenleitbleche 3 are separated by a web 113 which extends along the center of the frame 112. In this embodiment, a more targeted extraction of fumes and vapors from areas below the extractor device 1 can be achieved. For this purpose, only the Wrasenleitblech 3, which is located above the source of fumes and vapors, such as a pot, brought from the rest position to the operating position. If, on the other hand, steam and vapor are to be sucked out of the entire area below the extractor device 1, then both Wrasenleitbleche 3 can be brought into the operating position. In this state, according to the embodiment FIG. 4b an extraction on the one hand via the gap between the underside of the edge 112 of the viewing hood 11 and the top of the respective Wrasenbleches 3. On the other hand continues to be a suction through the gap between the bottom of the web 113 and the top of the respective Wrasenblechs 3. Thus, the Length of the gap opposite to in the FIG. 4a enlarged embodiment shown and the suction of vapors and steam can be increased.

In the in Figure 4c Finally, an embodiment of the viewing hood 11 is shown in which four Wrasenleitbleche 3 are provided. The four Wrasenleitbleche 3 are received in the frame 112 and are separated by webs 113, which are provided in a cross shape in the frame 112. With this embodiment, in a cooker with four hobs a Einzelkochstellenabsaugung be achieved. Are all Wrasenleitbleche 3 in the operating position, the length of the gap, are sucked through the vapors and steam, compared to the embodiment of FIG. 4b further increased by the additionally provided transverse to the first web 113 extending second web 113.

The movement of the Wrasenleitbleche 3 or by a mechanism (not shown), such as a gear mechanism done, this can be attached to the viewing hood 11, in particular to the frame 112 of the viewing hood 11 and / or on the Wrasenleitblech 3 itself. The part of the movement mechanism, which is attached to the Wrasenleitblech 3, preferably can be removed together with this of the extractor device 1. This facilitates the cleaning of the extractor device 1. Are as in the Figures 4b and 4c shown, several Wrasenleitbleche 3 provided so they are each attached via a separate movement mechanism or attachment mechanism to the extractor device 1 and can be moved separately.

The attachment mechanism and / or movement mechanism may be provided at the edge of the respective Wrasenleitblechs. In this case, preferably at least two mechanisms are provided, which may be provided, for example, at opposite corners of the Wrasenleitblechs. Alternatively, the attachment mechanism and / or movement mechanism may be provided in the center of the surface of the respective vapor guide plate.

The drive of the movement mechanism may be mechanical or electrical in nature. The movement mechanism may, for example, be connected to the control of the extractor device 1, in particular the control of the fan. If the extractor device 1 is turned on, the or the Wrasenleitbleche 3 can be moved from the rest position to the operating position.

Additionally or alternatively, the movement mechanism may be connected to sensors which measure the emergence of vapors and fumes below the Wrasenleitblechs 3. This is particularly advantageous in extractor devices 1, in which more than one Wrasenleitblech 3 is provided. By the sensor control, the Wrasenleitblech 3, which is provided in the region in which the emergence of vapors and fumes is greatest, are each brought into the operating position.

Although the invention has been described essentially with reference to a horizontally arranged extractor device with horizontal viewing hood, the invention also includes extractor devices, which are, for example, vertically aligned or extractor devices with a diagonally aligned to the horizontal viewing hood. Directional information and location information, which have been made with respect to the horizontally oriented viewing hood, shall be transmitted in accordance with the other said extractor devices.

Furthermore, the invention is not limited to extractor devices in which only one filter element is provided. In particular, in large extractor devices, for example, several filter cartridges can be provided side by side. The invention is also not limited to the embodiments shown with respect to the arrangement of the individual components of the extractor device 1. For example, the Wrasenleitblech be included in the viewing hood, that this is offset in the rest position relative to the underside of the viewing hood upwards.

With the present invention, an improvement of the space efficiency and the function is achieved with fume extractors with hidden filters. In contrast to the prior art, the design possibilities of the designer are not impaired in the present invention, since the used for optical lamination of the filter elements Wrasenleitblech requires only a small space. The Wrasenleitbleche or the Wrasenleitblech that / hide the filter elements are inventively designed lowered. At rest, the Wrasenleitblech is preferably arranged flush with the lower edge or to another specified area within the extractor device. As a result, a cleaning of the extractor device is facilitated and optimizes the optical lamination of the filter elements. At the same time, the invention provides insulation against drafts from the outside and provides odor and Geräuschabschottung. In a device with a downstream odor filter the Wrasenleitblech also acts as another barrier. In the active state, that is, in the operating position of the Wrasenleitbleches, this - or if several are provided, at least one of the Wrasenleitbleche - drove down or at a vertical intake to the front and selectively release the airway.

Thus, the present invention provides an improvement in construction efficiency, an increase in design options, an improvement of targeted extraction in individual zones, a better cleaning ability of the extractor and a foreclosure against noise, odors and other harmful substances from the outside or inside created.

LIST OF REFERENCE NUMBERS

1

Exhaust hood

11

Viewing cover

111

suction

112

Frame viewing hood

113

Webs viewing hood

12

fireplace

2

filter unit

3

Wrasenleitblech

S

gap

H

Height of sight hood (invention)

H _SdT

Height of sight hood (prior art)

Claims (7)

1. Vapour extraction device comprising a suction opening (111), a filter element (2) and at least one vapour guide plate (3), characterised in that the vapour guide plate (3) is fastened such that it can be moved relative to the filter element (2), the vapour guide plate (2) closes a suction area of the suction opening (111) in a rest position and the vapour guide plate (3) is mounted such that this can be moved in a direction at right angles to the surface of the suction opening (111).
2. Vapour extraction device according to claim 1, characterised in that the filter element (2) completely covers the suction opening (111).
3. Vapour extraction device according to one of claims 1 or 2, characterised in that the surface of the vapour guide plate (3) corresponds to the surface of the suction area (111) to which this is assigned.
4. Vapour extraction device according to one of claims 1 to 3, characterised in that at least two vapour guide plates (3) are provided and the suction opening (111) is completely closed in the rest position of the vapour guide plate (3).
5. Vapour extraction device according to one of claims 1 to 4, characterised in that the vapour guide plate (3) rests against the filter element (2) in the rest position.
6. Vapour extraction device according to one of claims 1 to 5, characterised in that the vapour guide plate (3) is mounted on the vapour extraction device (1) such that this can be moved manually.
7. Vapour extraction device according to one of claims 1 to 6, characterised in that the vapour guide plate (3) is mounted on the vapour extraction device (1) such that this can be moved between the rest position and an operating position by means of an electrical controller.

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