EP3686496B1 - Vapour hood and method for changing filter units - Google Patents

Description

The present invention relates to an extractor hood comprising at least one housing device with at least one treatment section with a round cross section. In this case, the housing or the treatment section comprises at least one inlet opening for sucking in vapors and at least one outlet opening for blowing out treated air. The present invention also relates to a method for changing filter units in such an extractor hood.

Extractor hoods are often used in kitchens above hobs in order to suck in the vapors that rise during cooking and in particular to free them from fat components. The cleaned air is then either discharged from the kitchen as exhaust air or blown back into the kitchen in a recirculation mode.

In order to rid the rising vapor of fat components, it is usually sucked into the extractor hood by means of a fan through a grease filter and then either discharged outside via a suitable air duct or fed back into the kitchen in recirculation mode. In the case of extractor hoods in particular, which are used in recirculation mode, odor filtering is often required in addition to the removal of fat components. Extractor hoods for air recirculation are known from the publication EP 2 498 006 A1 and from the pamphlet DE 10 2017 100 855 A1 .

Odor pollution in recirculation mode can be achieved, for example, by means of odor-absorbing and/or neutralizing filters, such as activated carbon filters. For this purpose, the air flow through the fan is directed or pressed through such a filter before leaving the extractor hood.

The problem with all extractor hoods, however, is usually the space required, especially for such additional filters. For a user, it is not just a question of the range hood functioning satisfactorily, but also of an attractive design. As a result, the available space is often greatly reduced. In particular extractor hoods with a round or rounded cross-section or housing, as can be seen in the publication DE 10 2012 022 571 A1 or the pamphlet EP 3 163 175 A1 or the pamphlet CN 108 592 116 A are known, often offer very poor or uncomfortable access to the filters. These can often only be removed with difficulty or not at all for cleaning or replacement. be reinstated. So must with the print U.S. 5,268,012 A For example, a shield plate forming the suction opening can be dismantled in order to significantly enlarge the suction opening and then be able to remove the cylindrical filter through the enlarged suction opening.

It is therefore the object of the present invention to provide an extractor hood with a round cross section, in which the filters for odor reduction are more accessible.

This object is achieved by an extractor hood having the features of claim 1 and by a method for changing filter units having the features of claim 9. Preferred developments of the invention are the subject matter of the dependent claims. Further advantages and features of the invention result from the exemplary embodiments.

The extractor hood according to the invention comprises at least one housing device with at least one treatment section with at least one round cross section. The housing device or the treatment section has at least one inlet opening for sucking in vapors and at least one outlet opening for blowing out treated air. According to the invention, at least one essentially flow-tight separating device is arranged in the processing section, which divides the processing section into at least one lower inlet section with the inlet opening and at least one upper blow-out section with the outlet opening. An essentially flow-tight separating device is designed in such a way that a maximum of 10 percent of the air flow to which it is exposed bypasses the separating device as leakage air flow. At least one passage is provided in the separating device as a connection between the lower inlet section and the upper blow-out section, with at least one fan device being arranged on the passage, which draws in air from the inlet opening and blows it out in the direction of the outlet opening. Furthermore, in the upper section of the processing section between the separating device and the outlet opening there is at least one essentially ring-shaped receiving space for accommodating at least two filter units, which is accessible at least in sections via at least one recess in the separating device in order to remove the filter units through this recess and/or use. The term essentially ring-shaped is to be understood in such a way that the figurative-technical term ring is not only reduced to a circular ring, but also includes other basic ring shapes. Neither is the relationship between the distance from the inside of the ring to the center and the distance from the outside of the ring to the center defined.

The extractor hood according to the invention is in particular an extractor hood which is suitable or designed exclusively or also alternatively for recirculation mode. The filter units, which can be inserted into the essentially ring-shaped receiving space, are preferably designed as odor filters and such odor filters, for example activated carbon filters, remove odors from the air that has already been cleaned by grease filters, which is particularly important when the air is blown back into the kitchen during recirculation mode is advantageous.

The housing device or the processing section has a round cross section. In this case, the processing section preferably has a substantially cylindrical shape, at least in sections. In particular, a dome-shaped configuration of the housing device or the extractor hood or the processing section is also preferred. Based on the above-mentioned definition of the essentially round cross-section, an essentially cylindrical shape can also include conical or asymmetrical spatial bodies.

The extractor hood according to the invention is preferably designed as a freely suspended extractor hood, which is arranged, for example, over a cooking island. In this case, an attachment of the extractor hood z. B. with wire ropes or the like on the ceiling.

The fact that the blower device is arranged at the passage means in particular that the blower device is directly or indirectly operatively connected to the opening or the passage, so that the blower device can convey air from the inlet opening to the outlet opening. In particular, the blower device is positioned above the passage on or on the separating device and is preferably fastened to the separating device.

The annular receiving space is preferably delimited by the housing device in the blow-out section and the blower device arranged in the blow-out section. In this case, the annular receiving space preferably extends around the blower device.

Since the blower device is arranged in the upper exhaust section, the blower device preferably sucks rising fumes through a grease filter arranged in or at the inlet opening into the extractor hood or into the preparation section and forces the air, which has already been cleaned of grease components, through the air that is arranged in the annular receiving space Filter units, which are designed in particular as odor filters. In this way, a particularly advantageous air flow is achieved by means of the blower device.

The recess in the separating device is preferably provided in such a way that the filter units movable in the circumferential direction in the receiving space can be inserted into and removed from the annular receiving space substantially transversely to the radius of the annular receiving space, i.e. in the axial direction. The specification essentially transverse to the radius is not limited to a strict geometric movement perpendicular to the radius, but includes different orientations in a common handling space. The tolerance includes a deviation of up to 60°.

Preferably, the recess in the separating device, via which access to the annular receiving space is provided, can be closed so that during normal operation of the extractor hood the entire air flow is reached through the passage in the separating device via the blower device. The recess is then only opened when a filter unit is to be removed from the annular receiving space or when a filter unit is to be changed. After a filter unit has been reinserted into the annular channel or the annular receiving space, the recess can also be closed again by means of a closure device.

As already explained above, at least one grease filter is preferably provided on or in the inlet opening. When flowing through the grease filter, the rising vapor is freed from grease components. Such a grease filter can preferably be accommodated in a visually appealing decorative panel, with the removal of the decorative panel preferably simultaneously removing the grease filter or filters so that they can be easily cleaned or replaced.

The extractor hood according to the invention offers many advantages. A significant advantage is that the separating device forms an upper and a lower section in the processing section, so that the processing section is divided into a suction side and a pressure side for the blower device. The fan sucks rising fumes through the grease filter and then pushes the sucked air through the other filter units, in particular through the odor filter. This results in a particularly favorable flow behavior reached. The configuration of the upper blow-out section as an annular receiving space with the recess for removing and inserting filter units ensures particularly favorable accessibility to the filter units.

According to the invention, at least one driver device is provided in the upper blow-out section in order to displace the filter units within the annular receiving space, in particular to move them from an inaccessible area of the annular receiving space to the recess. This achieves a particularly advantageous embodiment in which the filter units can be displaced along the ring-shaped receiving space, that is to say essentially transversely to the radius, in particular in the circumferential direction, of the round cross-section of the treatment section.

Depending on the size, design and number of filter units used in the annular receiving space, access to all filter units is not always given. And the driver device is provided to transport inaccessible filter units to the recess for removing the filter units from the annular receiving space.

The shifting of the filter units by means of the driver device can be motorized or achieved automatically and/or manually, depending on the configuration.

The driver device particularly preferably comprises at least one driver ring and/or at least one driver disk. Such a driver disk or a driver ring can be arranged in particular on the outer edge of the receiving space or radially on the outside in the receiving space. In this case, the filter units preferably come into operative connection with the driver ring or the driver disk, so that a displacement of the filter units is brought about by the movement of the driver ring or the driver disk.

For this purpose, the driver ring and/or the driver disk is/are preferably arranged so as to be rotatable in the receiving space. By turning the driver disc or the driver ring, the filter units can be shifted.

In expedient developments, the driver ring and/or the driver disk is rotatably accommodated at least in sections on the separating device. In this case, the drive ring and / or the drive plate z. B. simply rest on the separator. However, other types of recording can also be used appropriately. For example, the driver ring and/or the driver disk can be accommodated on the separating device via a rail system or can include other sliding aids or sliding elements, whereby a shifting of the driver ring or the driver disk on the separating device is facilitated.

The driver device and/or at least one filter unit preferably comprises at least one fastening device. In this case, contact is provided between the driver device and the filter unit by means of such a fastening device, which is preferably designed to correspond between the driver device and the filter unit. This has the effect that a displacement or rotation of the driver ring or the driver disk or the driver device is accompanied by a displacement of the filter units. Such a fastening device or a fastening between the filter unit and driver device can be achieved, for example, as a hook, driver or other fastening element with corresponding recesses. An adhesive connection, in particular a reusable adhesive connection such as Velcro or a corrugated ring or the like can also be used as the connection between the driver device and the filter units.

Particularly preferably, at least one preferably removable closure device is provided for closing the recess in the separating device. In this way it is achieved that a separating device is provided that is fluidically tight except for the passage in the separating device.

In expedient configurations, at least one filter unit is arranged on the closure device. In this case, at least one filter unit and the closure device is provided as a common structural unit, so that, depending on the configuration, the z. B. the last filter unit is used together with the closure device in the annular receiving space.

The method according to the invention is suitable for changing filter units from the ring-shaped receiving space of an extractor hood, as has been described above. At least one filter unit is removed from the exception space through the recess in the separating device.

The method according to the invention also offers the advantages already described above.

Preferably, at least one filter unit is shifted within the accommodation space to the removal device in the separating device by moving the driver device in order to remove the filter unit.

The method described here describes the removal of a filter unit from the receiving space of an extractor hood according to the invention. When using such a filter, the procedure can be carried out in reverse order.

A filter unit is inserted into the receiving space through the recess in the separating device. The filter unit is then moved away from the recess by moving the driver device.

Alternatively, when inserting a filter unit, it can also be moved manually out of the area of the recess in the separating device. Alternatively, when removing the filter, a filter unit can preferably be moved only in sections by means of the driver device until it can be reached by hand and can then also be pulled to the recess by hand.

In all configurations, the driver device can preferably be motorized and/or manually operated.

The recess in the separating device is preferably released by removing the closure device and/or closed by inserting the closure device.

It is particularly preferred that at least one filter unit is removed and/or inserted together with the closure device. This is possible in particular when at least one filter unit and the closure device form a common structural unit. In particular, this also means that at least one filter unit can be arranged in the area of the recess.

In expedient developments, the filter unit is inserted through the recess in the separating device into the annular receiving space, with the filter unit being displaced within the receiving space away from the recess by pressing against the filter unit. By manually pressing against the filter unit or pushing against the filter unit or by motorized movement of the driver device and resulting pushing against the filter unit, a filter unit can be moved away from the recess into an otherwise inaccessible area of the receiving space. When pressing against the inserted filter unit by hand or motor, the previously inserted filter units can, depending on the design, be conveyed further by means of the newly inserted filter unit if they are not also displaced by means of the driver device.

Further advantages and features of the present invention result from the exemplary embodiment, which is explained below with reference to the enclosed figures.

Figur 1

eine rein schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Dunstabzugshaube in einer perspektivischen Ansicht von oben;

Figur 2

eine rein schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Dunstabzugshaube in einer perspektivischen Ansicht von unten;

Figur 3

eine rein schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Dunstabzugshaube in einer Schnittansicht von der Seite;

Figur 4

eine rein schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Dunstabzugshaube in einer perspektivischen Explosionsansicht;

Figur 5

eine rein schematische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Dunstabzugshaube in einer perspektivischen Explosionsansicht von oben;

Figur 6

eine rein schematische Darstellung einer Filtereinheit in einer perspektivischen Ansicht;

Figur 7

eine rein schematische Darstellung einer Filtereinheit auf der Verschlusseinrichtung; und

Figur 8

eine rein schematische Darstellung von Filtereinheiten auf einer Mitnehmereinrichtung und einer Verschlusseinrichtung mit Filtereinheit in einer perspektivischen Ansicht.

In the figures show:

figure 1

a purely schematic representation of an embodiment of an extractor hood according to the invention in a perspective view from above;

figure 2

a purely schematic representation of an embodiment of an extractor hood according to the invention in a perspective view from below;

figure 3

a purely schematic representation of an embodiment of an extractor hood according to the invention in a sectional view from the side;

figure 4

a purely schematic representation of an embodiment of an extractor hood according to the invention in a perspective exploded view;

figure 5

a purely schematic representation of an embodiment of an extractor hood according to the invention in a perspective exploded view from above;

figure 6

a purely schematic representation of a filter unit in a perspective view;

figure 7

a purely schematic representation of a filter unit on the closure device; and

figure 8

a purely schematic representation of filter units on a driver device and a closure device with filter unit in a perspective view.

In the Figures 1 and 2 an embodiment of an extractor hood 1 according to the invention is shown in two different perspective views, one from above and one from below.

In the exemplary embodiment shown here, the extractor hood 1 is designed as a freely suspended extractor hood 1, which can be fastened to the ceiling above a cooking island via three wire cables 27, for example.

The embodiment shown of an extractor hood 1 according to the invention has a housing device 2 with an upper housing cover 29, within which a processing section 3 is provided for processing vapors that have been sucked in. The treatment section 3 has a round cross-section 4, a round cross-section essentially transverse to the intake direction being considered here.

In general, the extractor hood shown here has an essentially dome-shaped design. The basic shape of the extractor hood 1 is essentially based on a hemisphere or a section of a sphere.

The paid extractor hood 1 is designed for air recirculation, for which purpose the extractor hood 1 has an inlet opening 5 through which rising vapors are sucked into the extractor hood 1 . Furthermore, several outlet openings 6 are provided on the top of the extractor hood, through which the treated air is blown back into the kitchen.

In the exemplary embodiment shown here, a decorative screen 20 is arranged in the area of the inlet opening 5 , by means of which one or more grease filters 21 are arranged in the inlet opening 5 . So by means of a in the Figures 1 and 2 said non-visible fan device 10 vapors through the grease filter 21, so that the interior of the extractor hood 1 is traversed by fat-free air as possible.

In figure 3 a cross section through an exemplary embodiment of an extractor hood 1 according to the invention is shown purely schematically. It can be seen here that in this exemplary embodiment too, the extractor hood 1 has an essentially dome-shaped configuration, with the cross section 4 of the treatment section 3 being round.

It can also be seen that the treatment section 3 within the extractor hood 1 is divided into a lower inlet section 8 and an upper outlet section 9 by means of a separating device 7 . The separating device 7 is designed to be essentially flow-tight. However, in the separating device 7 in the exemplary embodiment shown, a passage 26 is provided, via which a fluidic connection between the lower inlet section 8 and the upper external blowing section 9 is provided.

In the exemplary embodiment shown here, a fan device 10 is provided above this passage 26, by means of which air is sucked through the grease filter 21 into the lower inlet section 8 and then blown back into the kitchen via the upper blow-out section through the outlet openings 6. The flow of air within the extractor hood is indicated purely schematically by means of the dashed arrows.

The arrangement of the blower device 10 in the upper exhaust section 9 creates a substantially ring-shaped receiving space 11 between the separating device 7 and the outlet openings 6, in which, as will be explained in more detail below, several filter units 12 can be arranged, which are designed here as odor filters 28. The blower device 10 then blows the air, which has already been freed from fat components, into the upper blow-out section and forces the air through the filter units 12 through the outlet openings 6 back into the kitchen.

In figure 4 is a purely schematic representation of an exemplary embodiment of an extractor hood 1 according to the invention in a perspective view from below, with the decorative panel 20 being shown removed from the inlet opening 5 together with the grease filters 21 in order to provide a view of the lower inlet section 8 and the separating device 7.

In figure 4 It can be seen that a separating device 7 is provided within the processing section 3, which is basically designed to be flow-tight. A passage 26 is provided in the center here, via which air can be conveyed into the upper blow-out section 9 or into the annular receiving space 11 by means of the blower device 10 arranged above it.

In order to insert or remove filter units 12 in the upper blow-out section 9 or in the annular receiving space 11 , a recess 13 is provided in the separating device 7 , via which a user can easily reach the filter units 12 .

The filter units 12 adapted to the annular receiving space 11 can be fed to the annular receiving space 11 via the recess 13 and then moved transversely to the radius of the processing section 3 into an otherwise inaccessible area 19 of the annular receiving space 11 .

When all filter units 12 provided have been inserted into the annular receiving space 11 , the recess 13 can be closed by means of a closure device 18 be so that the passage 26 is the only fluidic connection between the upper section 9 and the lower section 8 .

In the exemplary embodiment shown here, the last filter unit 12 is inserted into the annular receiving space 11 together with the closure device 18 . For this purpose, this filter unit 12 and the closure device 18 are provided as a common structural unit, with the filter device 12 being screwed onto the closure unit 18 here.

In order to move or relocate the filter units 12 from the otherwise inaccessible areas 19 to the recess 13 , a driver device 14 is provided in the exemplary embodiment shown here, which here comprises a driver ring 15 or a driver disk 16 . This driver ring 15 is arranged radially on the outside in the annular receiving space 11 , with the filter units 12 also being displaced in the direction of rotation by rotating the driver ring 15 via the separating device 7 . A displacement of the filter units 12 can thus be achieved via the driver ring 15 or a driver disk 16, even if the filter units 12 themselves cannot be reached.

In figure 5 is the embodiment according to figure 4 shown in a perspective view from above, with the in figure 1 shown upper housing cover 29 is not shown in order to be able to look into the upper blow-out section 9 or the annular receiving space 11 from above.

Here, too, the recess 13 can be seen, via which filter units 12 can be supplied to the annular receiving space 11 and removed from it. This view also shows the closure device 18, which is designed as a common structural unit, together with the one with a filter unit 12.

It can also be seen that the inside of the decorative panel 20 is divided into four sections, in each of which a grease filter 21 is arranged. The decorative panel 20 also includes fastening tabs 30 , via which the decorative panel 20 engages in corresponding receptacles in the lower inlet section 8 of the processing section 3 . In addition, a lock 31 is provided.

In figure 6 A filter unit 12 is shown in a purely schematic perspective view, which here comprises a filter frame 22 and a filter element 23 , the filter element 23 being designed here as an odor filter 28 .

In figure 7 It is again shown that a filter unit 12 can be designed as a common structural unit with the closure device 18, with the filter frame 22 of the filter unit 12 being fixed on the closure device 18 or screwed to it.

In figure 8 the driver device 14 is shown purely schematically, which is designed here as a driver ring 15 or as a driver disk 16 . In the exemplary embodiment shown here, this driver device 14 or driver disk 15 rests on the separating device 7 in the upper blow-out section 9 in the installed state. As can be seen, the driver ring 15 is dimensioned in such a way that it lies in the outer region of the annular receiving space 12 .

If a filter unit 12 is inserted through the recess 13 into the annular receiving space 11, the filter units 12 engage in the driver device 14. A fastening device 17 is provided for this purpose, which in the exemplary embodiment shown here comprises a fastening element 25 on the filter unit 12 or on the filter frame 22 and a fastening element 24 on the driver device 14 .

Here, hook-like structures are provided as fastening elements 25 on the filter units 12, which engage in fastening elements 24 designed as recesses in the driver ring.

As a result, when the driver ring 15 is rotated or displaced, the filter units 12 engaging in it are also displaced, so that they can be moved to the recess 13 in the separating device 7 .

When the filter units 12 are inserted into the annular receiving space 11 through the recess 13, they can also be displaced again by rotating the driver device 14 or the driver ring 15.

When inserting, however, it is also possible for the filter units 12 to be pushed or pressed manually from the recess 13 transversely to the radius of the treatment section 3 into the annular receiving space 11 . Filter units 12 that have already been used are conveyed further by pushing in the following filter unit and can be moved into an otherwise inaccessible area 19 .

In all configurations, it is possible to design the extractor hood 1 or the driver device 14 in such a way that they can be operated manually and/or motorized or can be automatically moved to relocate the filter units 12 within the annular accommodation space 11.

Reference List

1

extractor hood

2

housing facility

3

processing section

4

cross-section

5

intake port

6

exhaust port

7

separator

8th

lower section

9

upper section

10

fan device

11

annular receiving space

12

filter unit

13

recess

14

driver device

15

driving ring

16

drive plate

17

fastening device

18

locking device

19

inaccessible area

20

decorative panel

21

grease filter

22

filter rack

23

filter element

24

fastener

25

fastener

26

passage

27

Wire rope

28

odor filter

30

fastening tab

31

locking

Claims (13)

1. Extractor hood (1) comprising at least one housing device (2) which has at least one treatment portion (3) having a round cross section (4) and which has at least one inlet opening (5) for sucking in vapours and at least one outlet opening (6) for blowing out treated air,

   at least one flow-tight separating device (7) being arranged in the treatment portion (3), which separating device divides the treatment portion (3) into at least one lower inlet portion (8) having the inlet opening (5) and at least one upper blow-out portion (9) having the outlet opening (6), at least one passage (26) being provided in the separating device (7) as a connection between the lower inlet portion (8) and the upper blow-out portion (9),

   at least one fan device (10) being arranged on the passage (26), which fan device sucks in air from the inlet opening (5) and blows it out towards the outlet opening (6), at least one annular receiving chamber (11) suitable for receiving at least two filter units being formed in the upper blow-out portion (9) of the treatment portion (3) between the separating device (7) and the outlet opening (6), which chamber is accessible at least in portions via at least one cut-out (13) in the separating device (7) in order to remove and/or insert the filter units through this cut-out (13),

   characterised in that

   the extractor hood (1) comprises at least two filter units (12) and at least one driver device (14) which is provided in the upper blow-out portion (9) in order to shift the filter units (12) within the annular receiving chamber (11) in order to move said units from a non-accessible region (19) of the annular receiving chamber (11) to the cut-out (13).
2. Extractor hood (1) according to claim 1, characterised in that the driver device (14) comprises at least one driver ring (15) and/or at least one driver disc (16).
3. Extractor hood (1) according to the preceding claim, characterised in that the driver ring (15) and/or the driver disc (16) is/are rotatably arranged in the receiving chamber (11).
4. Extractor hood (1) according to either of the two preceding claims, characterised in that the driver ring (15) and/or the driver disc (16) is rotatably received at least in portions on the separating device (7).
5. Extractor hood (1) according to either of the two preceding claims, characterised in that the driver device (14) and/or at least one filter unit (12) comprises at least one fastening device (17).
6. Extractor hood (1) according to the preceding claim, characterised in that at least one closure device (18) for closing the cut-out (13) in the separating device (7) is provided.
7. Extractor hood (1) according to the preceding claim, characterised in that at least one filter unit (12) is arranged on the closure device (18).
8. Extractor hood (1) according to any of the preceding claims, wherein the filter units (12) are shifted by means of the driver device (14) in a motor-driven or automatic and/or manual manner.
9. Method for changing filter units (12) from the annular receiving chamber of an extractor hood according to any of the preceding claims, characterised in that at least one filter unit (12) is removed from the receiving chamber (11) through the cut-out (13).
10. Method according to the preceding claim, characterised in that at least one filter unit (12) is shifted within the receiving chamber (11) to the cut-out in the separating device (7) by moving the driver device (14).
11. Method according to either of the preceding method claims, characterised in that for an extractor hood (1) according to any of claims 6 to 8, the cut-out (13) in the separating device (7) is opened by removing the closure device (18) and/or is closed by inserting the closure device (18).
12. Method according to the preceding method claim, characterised in that at least one filter unit (12) is removed and/or inserted together with the closure device (18).
13. Method according to any of the preceding method claims, characterised in that the filter unit (12) is inserted through the cut-out (13) in the separating device (7) into the receiving chamber (11) and in that the filter unit (12), inside the receiving chamber, is shifted away from the cut-out by pressing against the filter unit.

Images