EP2144011B1 - Fume extraction device - Google Patents

Description

The present invention relates to a fume extractor, in particular a fume extractor in the form of a counter.

Meal are extractor devices that include a fan for suction of vapor and a Wrasenschirm. Above the Wrasenschirms, which is also referred to as a viewing hood, a channel is arranged at Essen, which is referred to as a fireplace. In the chimney usually the fan is included. In addition, the chimney directs the air drawn in by the fan to an air outlet of the extractor device.

Vapor extraction devices are used in two so-called modes. On the one hand, devices are known that can be used in the exhaust air operation. In this mode, the air drawn in by the fan is released through an outlet to the environment after cleaning with filters or other cleaning agents. In the case of recirculation hoods, on the other hand, the air sucked in and cleaned by the ventilator is discharged directly into the room in which the extractor device is operated.

Since the requirements for the purity of the air in a fume extractor, which is operated in the recirculation mode, are higher, the pre-cleaned by grease filter air in these extractor devices using activated carbon filters or similar filter elements from odors and / or moisture. Here, the extractor devices work on the principle that the enriched with fat, moisture and cooking fumes air is first passed through a grease filter and then through the activated carbon filter.

The thus cleaned air is returned through slots or openings in the upper part of the chimney into the room in which the extractor device is operated. This room can be, for example, a kitchen. A disadvantage of this air duct with circulating air extractor devices is that the area over which the purified air can escape is low and therefore there are strong currents and noise developments.

Such an extractor hood is in the DE 10 2004 042 291 A1 disclosed. The hood has a chimney, which consists of two parts. In particular, the fireplace consists of a Innenkamingehäuse and a Außenkamingehäuse, each representing sheet metal parts. Slit-like openings are made in the inner chamber housing in the upper area.

Also the EP 1 843 100 A2 discloses an apparatus and method for extracting vapor in which the chimney has ventilation openings in the form of slots.

The EP 1 111 311 A2 describes a fume extraction device having a fume exhaust air path for circulating air. At the front of the extractor device therefore a clean air outlet is formed, which is formed by slots.

In the DE 201 22 340 U1 an extractor hood is described in which the fireplace is formed of panels that at least partially serve as an air delivery area. The outer sides of the panels are formed, for example, as perforated plates, stair tread plates or grids. A disadvantage of this embodiment of the hood is that the construction of the extractor device is complex due to the large number of items and the handling, such as cleaning for the user is expensive.

Object of the present invention is therefore to provide a fume extraction device, with on the one hand a sufficiently large area for the discharge of purified air from the extractor device is present and still has a simple structure.

According to the invention, the object is therefore achieved by a fume extraction device with a viewing hood, a chimney disposed above the viewing hood and an air outlet unit which forms part of the chimney, wherein at least a part of one of the walls of the air outlet unit consists of an air-permeable material and at least two walls of the air outlet unit represent one-piece component. The extractor device is characterized in that at least part of two lateral outer surfaces the air outlet unit is made of air-permeable material that represents a woven fabric, expanded metal mesh, fleece or knitted fabric.

In the sense of this invention, a vapor extraction hood for kitchens and particularly preferably a forage is referred to as the extractor hood. The Esse can be configured as a Wandesse or Inselesse. The viewing hood, which is also referred to as Wrasenschirm, has a suction opening for sucking contaminated air. In the suction opening, a grease filter is preferably provided. The chimney of the extractor device according to the invention serves on the one hand to accommodate the fan of the extractor device and on the other hand, the air duct of the air sucked through the fan and cleaned by the grease filter. For the purposes of the present invention, the air outlet unit is a component via which the air treated in the extractor device can escape from the extractor device. The air outlet unit forms part of the fireplace. The air outlet unit and the chimney can be formed by a common component. It is equally possible to carry out the air outlet unit as a separate component which is connected to the fireplace. In particular, at least part of the outer walls of the chimney is formed by the air outlet unit. As outer walls in this context, the walls of the fireplace are referred to, which are visible to the user of the extractor device in the assembled state of the extractor device.

As an air-permeable material, of which at least a part of the walls of the air outlet unit, is understood in the context of this invention, a material having over its entire surface air outlet surfaces. In contrast to material in which openings or slots are distributed, a larger area for the air outlet can be made available with an air-permeable material. In the case of air-permeable material, most of the surface that covers it is permeable to air. The individual openings or pores of the air-permeable material preferably have an opening cross section of less than 4 square millimeters, preferably less than 2 square millimeters.

At least two of the walls of the air outlet unit according to the present invention are a one-piece component. Preferably, all visible walls, that is, outer walls of the air outlet unit are combined as a one-piece component.

As a one-piece component in this case a component is referred to, which can be fixed with an assembly step on the extractor device. For the final attachment of the one-piece component to the extractor device fasteners may be provided which may be provided on the air outlet unit or may be present as a separate element. The one-piece component comprising at least two of the walls of the air outlet unit may be manufactured as an integral component or pre-assembled. In the latter case, the at least two walls of the air outlet unit are preferably connected to each other inseparably. This can be done by known manufacturing methods, such as welding or riveting.

By at least two walls of the air outlet unit represent a one-piece component, that is, combined into one component, a number of advantages can be achieved. On the one hand, the assembly and disassembly of the air outlet unit is simplified. This is of particular importance since the air outlet unit must be removed from the extractor for cleaning or repair work. In addition, the air outlet unit is given a stability by a one-piece construction, which simplifies the handling during assembly and storage. The increase in stability is particularly important in the air outlet unit according to the invention, since at least part of the walls are formed by an air-permeable material. The fact that this optionally has a lower strength or stability is inventively taken into account that the stability is provided by combining at least two walls to form a component. Finally, the one-piece construction of the air outlet unit improves the visual appearance of the extractor device.

According to one embodiment, the air outlet unit has at least three outer surfaces and at least part of a front side and two lateral outer surfaces, which are also referred to below as side surfaces, are made of air-permeable material. Also in this embodiment, the front side and the two lateral outer surfaces of the air outlet unit are preferably designed in one piece, that is to say combined into one component. For the purposes of this invention - unless otherwise defined - directional information and position information, such as front, top and bottom, based on the state of the extractor device used in which this is mounted for operation, the is for example attached to a room wall. The front and the two lateral outer surfaces adjoin one another. The parts of these surfaces made of air-permeable material preferably extend to the edges of the surfaces adjacent to each other. Thus, it becomes possible to make the air-permeable areas of the at least three sides of a continuous air-permeable material. This again simplifies the manufacture and handling of the extractor device. In addition, the visual appearance of the extractor device is calmed. Since the air passages in the air-permeable material according to the invention are evenly distributed over the entire area of the material, the air-permeable area extending over the at least three surfaces of the air outlet unit has a uniform visual appearance. The air-permeable region of the air outlet unit is preferably larger than an area which may be covered by fastening or carrier elements.

Furthermore, the provision of air-permeable areas on at least three surfaces of the extractor device creates a large area over which air can escape from the air outlet unit. In the extractor device, which is operated in the recirculation mode, this is of particular importance. In these extractor devices, all of the air drawn in via the fan of the fume extractor must be discharged after cleaning to the environment in the room in which the fume extractor is operated. If this relatively large amount of air is emitted over a small area, in particular individual openings, for example in the form of slots, the flow rate of the exiting air is very high. There are thus tensile effects, which are unpleasant for the user of the extractor device. In the case of the extractor device according to the invention, essentially the entire visible surface of the air outlet unit can serve for the air outlet. As a result, a large area is thus made available and tensile effects can be avoided. The occurrence of strong airborne noise that can occur at small openings and a small air outlet area is avoided.

According to one embodiment, the air outlet unit comprises a ceiling which closes the unit upwards. This ceiling consists at least partially of air-permeable material. The ceiling is preferably made in one piece with the other parts of the air outlet, that is forms with this one one-piece component. As a result, on the one hand, the area over the air outlet is further increased. On the other hand, in particular in the case of an air outlet unit in which an air-permeable region is provided up to the upper edge at least on an outer surface, the air-permeable material of the blanket can be connected to the air-permeable material of the at least one outer surface, that is to say be made of a material.

By providing at least one area of the ceiling as an air-permeable area, it is also possible to dispense the air also beyond the outer walls of the air outlet unit upwards. As a result, the risk of tensile effects for the user is further reduced. In an embodiment in which the ceiling, which may also be referred to as a lid, of the air outlet unit is made entirely of air-permeable material, the extractor device is preferably a wall-mounted counter. Even with a ceiling-mounted dining, which is also referred to as Inselesse, the ceiling may be at least partially made of air-permeable material. However, in this case, additional fastening or reinforcing elements are to be provided on the ceiling, which as a rule are not permeable to air.

The air outlet unit according to the present invention can be used for the pure air outlet of purified air from the extractor device. Alternatively, according to one embodiment, filter material may be provided in the air outlet unit on at least part of the area of the air-permeable material. The filter material may be attached to the inside of the air-permeable material at this. But it is also possible to arrange the filter material as a separate component, for example in the form of a filter unit or filter cartridge on the inside of the air-permeable material. In both cases, this embodiment of the extractor device has the advantage that the large, provided by the air-permeable material, surface can also serve to clean the air in addition to the pure air outlet. In particular, in an embodiment in which the filter material is attached to the air-permeable material, the construction of the extractor device and its handling, in particular cleaning is further simplified. The filter material can be separated from the extractor device with the one-piece air outlet unit. Thereafter, the filter material may be separated from the air outlet unit and cleaned or replaced in a position where the operation is easier for the user become. For this purpose, the filter material is releasably connected to the air-permeable area. The arrangement of the filter material on the air outlet unit allows the filter to be designed with a much larger volume and thus a much longer service life. The user therefore has to change the filter or the entire air outlet unit less frequently. As the filter material or filter, an odor filter such as an activated carbon filter is used in the air outlet unit.

According to one embodiment, the chimney of the extractor device comprises a facing part and the air outlet unit is arranged on the facing part of the chimney. Arranged on the facing part in this context means that the air outlet unit is located above the veneer part and is in direct contact with it or via further components of the extractor device. Alternatively, it is also possible that the air outlet unit consists in its lower part of an air-impermeable material and this area serves as a veneer part. When providing a separate facing part, however, it is possible to use the fact that the air outlet unit can be removed from the extractor device independently of the veneer part, thereby reducing the weight of the part to be removed.

The embodiment of the fireplace with a veneer part has a number of advantages. The facing part, which can represent a channel section, is arranged directly on the viewing hood in this embodiment. In this area, the fan of the extractor device is also arranged. Thus, the veneer serves on the one hand to block the inspection of the fan, whereby the visual appearance of the extractor device is improved. On the other hand, the air flow can be directed onto the air outlet unit arranged above the veneer part by the veneer part. A direct influx of the user of the extractor device, which can occur in a fume extraction device in which the entire fireplace is made of air-permeable material, can be avoided. Finally, the veneering part, if this is designed as a separate part, serve as a seat for the air outlet unit. As a result, the underside of the air outlet unit can be made particularly simple and the air-permeable area of the outer surfaces of the air outlet unit can extend to the lower edge thereof.

The air outlet unit is preferably a preassembled component. As a pre-assembled or pre-assembled component, an air outlet unit is referred to, in which the individual components are fastened or held together. Therefore, the components may be connected to each other before attaching the air outlet unit to the extractor device, and the preassembled air outlet unit may be attached to the extractor device as a component. Particularly preferably, the components are already connected to one another in the production of the air outlet unit. The connection of the components of the air outlet unit is preferably a permanent connection. For example, the air-permeable material can be welded, pressed or riveted to a support frame of the air outlet unit. The advantage of a preassembled air outlet unit consists on the one hand in the assembly and handling of the extractor device and on the other hand in the reduced requirements for storage.

The air outlet unit according to one embodiment comprises a support frame which forms the lower and / or rear edge of the air outlet unit. The support frame preferably represents a continuous frame. If this extends at the lower edge of the air outlet unit, it can serve for guiding and fastening the air outlet unit to the viewing hood or an optionally provided facing part. Another advantage of a carrier frame is that it gives the air outlet unit a certain rigidity or stability. Therefore, in providing a support frame, the remaining part of the air outlet unit can be made of a material which may have a lower rigidity. In particular, the remaining part of the outer surface of the air outlet unit can therefore be configured as an air-permeable part. The air-permeable part preferably consists exclusively of the air-permeable material. However, it is also possible according to the invention that the air outlet unit has supporting devices which support the air-permeable material and hold it in the desired shape. These support devices, which may be formed as webs or frames are then provided on the inside of the air-permeable material, that is, are located in the interior of the air outlet unit. As a result, the external appearance of the extractor device is not adversely affected by the support devices. The Use of support devices is preferably limited to such air-permeable materials whose own rigidity does not ensure form retention.

Additionally or alternatively to the extension of the support frame at the lower edge of the air outlet unit, this can also extend to the rear edge of the air outlet unit. Preferably, the support frame extends at the rear edge over the entire height of the air outlet unit and extends over a ceiling of the air outlet unit. On account of this configuration of the support frame, the provision of separate support devices can be largely avoided. On the other hand can be done by the support frame at the rear edge of the air treatment device attaching the air outlet unit to the room wall, where the extractor device is mounted. The attachment can be done immediately. Alternatively, the air outlet unit is attached to a wall frame which is mounted to the room wall.

According to the invention, the air-permeable material is a woven, expanded metal, fleece or knitted fabric. By using such materials which do not consist of a flat base material but of webs or threads, a ratio of the air outlet surface to the area covered by the webs or threads can be maximized , This also maximizes the amount of air exiting through the air-permeable material without allowing direct insight into the air outlet unit.

The air-permeable material preferably consists of metal and / or has a coating, in particular metal coating. When using metal, the rigidity required for maintaining the air-permeable area can be easily provided. In addition, the use of metal is advantageous, since this is resistant to attacks with a suitable choice. For example, stainless steel, steel or aluminum is used as the metal. Additionally or alternatively, the air-permeable material may also have a coating. This is so applied that the air leaks are not blocked in the air-permeable material. In particular, the coating is applied only to the webs or threads of the air-permeable material. If the threads or webs of the air-permeable material consist of metal or a stable plastic, the coating can, for example, protect the Serve metal. In this case, the coating material may be, for example, paint. If, on the other hand, another base material has been selected for the threads or webs, for example a plastic or a natural material, ie if the base material is a fabric, fabric grid, fabric or fabric, the coating can be used to protect this base material and at the same time to give a certain stability or stiffness. The coating can be made of plastic or metal.

Figur 1:

eine schematische Perspektivansicht einer Ausführungsform der erfindungsgemäßen Dunstabzugsvorrichtung;

Figur 2:

eine schematische Perspektivansicht der Ausführungsform der Dunstabzugsvorrichtung aus Figur 1 in einem ersten Zustand;

Figur 3:

eine schematische Perspektivansicht der Ausführungsform der Dunstabzugsvorrichtung aus Figur 1 in einem zweiten Zustand;

Figuren 4a bis 4c:

eine schematische Frontansicht, Seitenansicht und Draufsicht auf einen Kamin einer Ausführungsform der erfindungsgemäßen Dunstabzugsvorrichtung;

Figur 5:

eine schematische Darstellung eines luftdurchlässigen Materials; und

Figur 6:

eine schematische Prinzipdarstellung einer Ausführungsform der erfindungsgemäßen Dunstabzugsvorrichtung.

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

FIG. 1:

a schematic perspective view of an embodiment of the extractor device according to the invention;

FIG. 2:

a schematic perspective view of the embodiment of the extractor device FIG. 1 in a first state;

FIG. 3:

a schematic perspective view of the embodiment of the extractor device FIG. 1 in a second state;

FIGS. 4a to 4c:

a schematic front view, side view and plan view of a chimney of an embodiment of the extractor device according to the invention;

FIG. 5:

a schematic representation of an air-permeable material; and

FIG. 6:

a schematic diagram of an embodiment of the extractor device according to the invention.

In FIG. 1 an embodiment of the extractor device 1 according to the invention is shown schematically. The extractor device 1 consists of a viewing hood 2, which is also referred to below as Wrasenschirm. Above the viewing hood 2, a chimney 3 is arranged. The chimney 3 consists of a facing part 5 and an air outlet unit 4 arranged above the facing part 5.

The structure of the chimney 3 will be described with reference to FIGS FIGS. 4a to c and 5 described in more detail. The chimney 3 has a box shape with a substantially rectangular cross-section. In the illustrated embodiment, only the front side 41 of the air outlet unit 4 is slightly curved outward. The back and bottom of the air outlet unit 4 are open.

The lower part of the chimney 3 is formed by a channel section which serves as a veneer part 5. This can be made of sheet metal and bent into a U-shape. At the top of the veneer part 5, a shoulder 51 is provided, on which the cross section of the veneer part 5 is reduced. At this paragraph 51, the air outlet unit 4 is placed. Alternatively, the underside of the air outlet unit 4 may form the shoulder 51. Furthermore, the shoulder 51 can also be formed by an inner part (not shown) provided in the facing part 5 and / or the air outlet unit 4.

The air outlet unit 4 consists of a support frame 45. This extends as a strip along the front side 41 and the side surfaces 42 and 43 of the air outlet unit 4 at the bottom thereof. At the rear edge of the side surfaces 42 and 43 of the support frame 45 extends over the entire height of the air outlet unit 4 also in the form of a strip. Also on the ceiling 44, the support frame 45 extends as a strip on the rear edge of the air outlet unit 4. The area bounded by the support frame 45 of the air outlet unit 4 is formed by an air-permeable material 46. This is shaped so that it maintains the box shape of the fireplace. In particular, the air-permeable material 46 on the two side surfaces 42, 43 just arranged so that this together with the strips of the support frame 46 in the side view of the air outlet unit 4 forms a rectangular shape. At the front 41, the air-permeable material 46 extends upwardly from the outwardly arched strip of the support frame 45 to the ceiling 44. The ceiling 44 is interposed by the support frame 45 at the rear edge and the remaining surface to the front 41 the side surfaces 42, 43 formed by the air-permeable material 46. At the edges between the ceiling 44 and the side surfaces 42, 43 and the front side 41, the air-permeable material is bent and continues at the respective surfaces 41, 42, 43. Also on the edges between the front 41 and the side surfaces 42, 43, the air-permeable material 46 is present throughout.

One possible embodiment of the air-permeable material is in the FIG. 5 shown schematically. In this embodiment, the air-permeable material 46 is an expanded metal mesh. By the webs 461 air outlet surfaces 462 of the air-permeable material are limited. The stitches formed by the webs 461 may have, for example, a height Mh of 4mm and a length MI of 8mm. The material thickness of the web 461 is in this case low and may for example be in the range of 0.75 mm to 1.25 mm. The expanded metal grid 46 is for the air outlet unit 4 after FIGS. 1 to 4 shaped so that this forms a cage part.

At a height of a chimney 3 of, for example, 630 mm, the height of the air-permeable region 46, which extends over the entire width of the front side 41, may be, for example, 400 mm. The width of the strip of the support frame 45 may be, for example, 35-40mm. The veneer part can for example have a height of 150-200mm. Thus, the essential part of the field of view of the extractor device 1 is used in the embodiment according to the invention as an air outlet.

With reference to the FIGS. 2 and 3 Now, the removal of the air outlet unit 4 and the internal structure of the chimney portion of the extractor device 1 will be described.

To the air outlet unit 4 from the state in FIG. 1 is shown to be removed from the extractor device 1, for example for cleaning or maintenance purposes, the air outlet unit 4 is moved forward relative to the facing part 5. It may also be provided that the air outlet unit 4 initially has to be displaced upwardly relative to the veneering part 5 for removal and then has to be removed forwards. As it turned out FIG. 3 shows, the extractor device 1 in the illustrated embodiment, a wall frame 6, this wall frame 6 serves to attach the extractor device 1 to the mounting wall. The wall frame 6 extends at the back of the extractor device 1 over the entire height of the chimney 3. At the wall frame 6 closes in the lower part of a Holder 61 on. This protrudes from the wall frame 6 to the front and is received in the facing part 5. In the holder, an air guide element, in particular an air guide cone 12 is held, via the air from a fan 11 (see FIG. 6 ) can get into the interior of the air outlet unit 4. The air outlet unit 4 is in the installed state, the in FIG. 1 is shown attached to the wall frame 6 and is seated on the veneer and / or the holder 61.

The operation of the extractor device 1 is described with reference to FIG. 6 described. Dusts or vapor which rise, for example, from a cooking point, are sucked in by the fan 11 and enter the extractor device 1 via a grease filter 21 provided in the viewing hood 2. From the viewing hood 2, the thus cleaned air enters the veneer part 5, in which the fan 11 is arranged. By the fan 11, the air is conveyed into the air outlet unit 4. In the illustrated embodiment, filter material 7 is provided on the inside of the front side 41, the side surfaces 42, 43 and the ceiling 44 of the air outlet unit 4. This filter material 7 is preferably an odor filter. The odor filter is designed as a large-volume or with a large surface equipped activated carbon filter. The filter material 7 is in the embodiment shown as mats to the air-permeable material 46 of the air outlet unit 4. In the region of the support frame 45, the filter material 7 may be recessed.

Due to the air flow generated by the fan 11, the air exits through the filter material 7 and the air-permeable material of the air outlet unit 4 from the extractor device 1. In this case, the air flows through both the front side 41, the side surfaces 42, 43 and through the ceiling 44 of the air outlet unit. 4

The chimney 3 is thus executed in the extractor device 1 according to the invention in the area of the air outlet unit 4 as an open through-flowable surface.

A number of advantages can be achieved with the present invention. For example, in a chimney with integrated activated carbon filter, the installation height of the fireplace can be reduced and thus many installation problems, such as insufficient room height or auszusägenden garland profiles are met. There is no vertical conflict with other components or kitchen architecture. In addition, the air-permeable area of the air outlet unit is kept free by the constant flow of lint and dust. An external cleaning is not necessary.

LIST OF REFERENCE NUMBERS

1

Exhaust hood

11

Fan

12

Air guide cone

2

Viewing cover

21

grease filter

3

fireplace

4

air outlet

41

front

42

side surface

43

side surface

44

ceiling

45

support frame

46

breathable material

461

Stege

462

Air outlet area

MI

mesh length

mh

mesh height

5

Verblendteil

51

paragraph

6

wall frame

Claims (9)

1. Vapour extraction apparatus with a viewing cover, a chimney (3) arranged above the viewing cover (2) and an air outlet unit (4), which forms a part of the chimney (3), wherein at least one part of one of the walls (41, 42, 43) of the air outlet unit (4) consists of an air-permeable material (46) and at least two walls (41, 42, 43, 44) of the air outlet unit (4) represent a single-piece component, characterised in that at least one part of two lateral outer surfaces (42, 43) of the air outlet unit (4) consists of air-permeable material (46), which represents a textile, expanded metal lattice, fleece or knitted fabric.
2. Vapour extraction apparatus according to claim 1, characterised in that the air outlet unit (4) has three outer surfaces (41, 42, 43).
3. Vapour extraction apparatus according to claim 1 or 2, characterised in that at least a part of a front side (41) of the air outlet unit (4) consists of air-permeable material.
4. Vapour extraction apparatus according to one of claims 1 to 3, characterised in that the air outlet unit (4) has a cover (44) which at least partially consists of an air-permeable material (46).
5. Vapour extraction apparatus according to one of claims 1 to 4, characterised in that there is provision in the air outlet unit (4) for filter material (7) on at least one part of the region of the air-permeable material (46).
6. Vapour extraction apparatus according to one of claims 1 to 5, characterised in that the chimney (3) of the vapour extraction apparatus comprises a cladding part (5) and the air outlet unit (4) is arranged on the cladding part (5) of the chimney (3).
7. Vapour extraction apparatus according to one of claims 1 to 6, characterised in that the air outlet unit (4) is a preassembled component.
8. Vapour extraction apparatus according to one of claims 1 to 7, characterised in that the air outlet unit (4) comprises a carrier frame (45) which forms the lower and/or rear edge of the air outlet unit (4).
9. Vapour extraction apparatus according to one of claims 1 to 8, characterised in that the air-permeable material (46) consists of metal and/or has a coating, in particular metal coating.

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