ES2922374T3 - Extractor hood and procedure for changing filter units - Google Patents

Abstract

Extractor hood (1) comprising a casing device (2) with a treatment section (3) with a round cross section (4) and with an inlet opening (5) for sucking vapors and with an outlet opening (6). ) to blow treated air. In this case, a substantially flow-tight separating device (7) is arranged in the processing section (3), which divides the processing section (3) into a lower inlet section (8) and an upper blowing section ( 9). , with a passage (26) as a connection between the lower inlet section (8) and the upper exhaust section (9). A ventilation device (10) is arranged in the duct, which sucks in air from the inlet opening (5) and expels it in the direction of the outlet opening (6). Furthermore, in the upper blowing section (9) of the treatment section (3) between the separating device (7) and the outlet opening (6) there is a substantially ring-shaped receiving space (11) for receiving at least two filter units (12) having a recess (13) are accessible in the separating device (7) to remove and/or insert the filter units (12) through this recess (13). In the method according to the invention, a filter unit (12) is removed from the receiving space (11) through the recess (13). (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Extractor hood and procedure for changing filter units

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 regard, the casing or the treatment section comprises at least one inlet opening to suck in vapors and at least one outlet opening to evacuate the treated air. The present invention furthermore also relates to a method for changing filter units in such an extractor hood.

Extractor hoods are often used in kitchens above the stove to extract the vapors that rise during cooking and, in particular, to free them of fatty components. The clean air is then discharged from the kitchen as exhaust air or blown back into the kitchen in a circulating air mode.

In order to release the rising vapors of the fatty components, these are usually sucked into the extractor hood by means of a fan through a grease filter and then diverted outside through a suitable air duct or returned to the kitchen in circulating air mode. In particular, in the case of extractor hoods that are used in circulating air mode, odor filtration is also often desired in addition to the release of fatty components. Extractor hoods for recirculating air mode are known from EP 2498006 A1 and DE 102017 100855 A1.

An odor contamination in the circulating air mode can be controlled, for example, by filters that absorb and/or neutralize odours, for example activated carbon filters. To do this, the airflow through the fan is directed or pressed through such a filter before leaving the extractor hood.

However, with all extractor hoods, the space requirement, in particular for such additional filters, is generally a problem. For a user, it is not only about a satisfactory operating mode of the cooker hood, but also about an attractive design. In this way, the amount of available space is often considerably reduced. In particular, cooker hoods with a round or rounded cross-section or housing, as known from DE 102012022571 A1 or EP 3 163175 A1 or CN 108592 116 A, often offer very poor or inconvenient accessibility to The filters. Thus, these often cannot be removed or reinserted at all or only with difficulty in cleaning or replacement.

Thus, for example, in document US Pat. No. 5,268,012 A, for example, a

shielding plate forming the suction opening in order to significantly enlarge the suction opening and then be able to remove the cylindrical filter through the enlarged suction opening.

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

This objective is achieved by means of an extractor hood with the characteristics of claim 1 and by means of a method for changing filter units with the characteristics of claim 9. Preferred refinements of the invention are the subject of the dependent claims. Other advantages and characteristics of the invention can be deduced from the examples of 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. In this connection, the housing device or the treatment section has at least one inlet opening for sucking in vapors and at least one outlet opening for evacuating the treated air. According to the invention, at least one essentially flow-tight separating device is arranged in the treatment section, which divides the treatment section into at least one lower inlet section with the inlet opening and at least one discharge section. top with outlet opening. An essentially flow-tight separation device is made in such a way that at most 10 percent of the airflow to which it is exposed bypasses the separation device as leakage airflow.

In this connection, at least one passage is provided in the separating device as a connection between the lower inlet section and the upper discharge section, wherein at least one ventilation device is arranged in the passage, which sucks in air from the opening. inlet port and evacuates it in the direction of the outlet opening. Furthermore, in the upper section of the treatment section between the separation device and the outlet opening, at least one essentially annular receiving space is formed for receiving at least two filter units, which is accessible at least in sections through at least one recess in the separating device for removing and/or inserting the filter units through this recess. The term essentially annular should 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. The relationship between the distance of the inner side from the ring to the center and the distance from the outer side of the ring to the center.

The extractor hood according to the invention is in particular an extractor hood that is suitable and designed exclusively or also alternatively for the recirculating air mode. In this connection, the filter units, which can be inserted into the substantially annular 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 advantageous when evacuating the air back into the kitchen during circulating air mode.

The housing device or the treatment section has a round cross section.

In this regard, the treatment section preferably has an essentially cylindrical shape, at least in sections. In particular, a dome-shaped configuration of the housing device or of the extractor hood or of the treatment section is also preferred. Proceeding from the aforementioned definition of essentially round cross-section, an essentially cylindrical shape can also include conical or asymmetric space bodies.

The extractor hood according to the invention is preferably designed as a freely suspended extractor hood,

which is arranged, for example, on a kitchen island.

In this connection, a fixing of the extractor hood can be realized, for example, with wire cables or the like on the ceiling.

The fact that the ventilation device is arranged in the passage means in particular that the ventilation device is functionally connected directly or indirectly with the opening or the passage, so that the ventilation device can convey air from the inlet opening to the outlet opening. In particular, the ventilation device is positioned above the passage in or on the separation device and is preferably attached to the separation device.

The annular receiving space is preferably delimited by the housing device in the discharge section and the ventilation device arranged in the discharge section.

In this connection, the annular receiving space preferably extends around the blowing device.

Since the ventilation device is arranged in the upper discharge section, the ventilation device preferably sucks the rising fumes through a grease filter arranged in or above the inlet opening in the extractor hood or in the treatment section and it pushes the air already cleaned of fat components through the filter units arranged in the annular receiving space, which are designed in particular as odor filters. Thus, a particularly advantageous air guidance is achieved by means of the ventilation 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 withdrawn from the annular receiving space essentially transversely to the radius of said space, i.e. in the axial direction. The essentially cross-radius specification is not limited to a strict geometric movement perpendicular to the radius, but includes different orientations of the same in a typical manipulation space. The tolerance includes a deviation of up to 60°.

Preferably, the recess in the separating device, through which an access to the annular receiving space is created, is provided in a closable way, so that during normal operation of the extractor hood the entire air flow comes through the ventilation device through the passage in the separation device. The recess then only opens 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 inserted into the annular channel or annular receiving space, the recess can also be closed again by means of a closing device.

As already explained above, at least one grease filter is preferably provided on or in the inlet opening. Passing through the grease filter, the rising steam is freed from the grease components. Such a grease filter can preferably be received in a visually appealing decorative panel, where removal of the decorative panel preferably removes the grease filter(s) simultaneously, so that these can be easily cleaned or changed.

The extractor hood according to the invention offers many advantages. A considerable advantage is that by means of the separating device an upper and a lower section are formed in the treatment section, so that the treatment section is divided into a suction side and a pressure side for the ventilation device. Thus, the fan sucks the rising fumes through the grease filter and then pushes the sucked air through the other filter units, in particular through the odor filters. In this way, a particularly favorable flow behavior is achieved. In this regard, by designing the upper discharge section as an annular receiving space with the recess for removing and inserting filter units, it ensures particularly favorable accessibility to the filter units.

According to the invention, at least one driving device is provided in the upper discharge section for moving the filter units within the annular receiving space, in particular for moving them from an inaccessible area of the annular receiving space into the recess. In this way a particularly advantageous configuration is achieved, in which the filter units can be displaced along the annular receiving space, i.e. essentially transversely to the radius, in particular in the circumferential direction of the round cross-section of the filter. treatment section.

Depending on the size, configuration and number of filter units used in the annular receiving space, accessibility to all filter units is not always given. And the pulling device is provided to transport inaccessible filter units to the recess to remove the filter units from the annular receiving space.

The displacement of the filter units by means of the drive device can be motorized or achieved automatically and/or manually according to the configuration.

The drive device particularly preferably comprises at least one drive ring and/or at least one drive disk. Such a drive disk or drive ring can be arranged in particular at the outer edge of the receiving space or radially outwardly in the housing space. In this connection, the filter units preferably come into operative connection with the drive ring or the drive disk, so that a displacement of the filter units occurs by movement of the drive ring or the drive disk.

For this, the drive ring and/or the drive disk are preferably arranged to rotate in the receiving space. Thus, by rotating the drive disk or the drive ring, a displacement of the filter units can be achieved.

In expedient developments, the drive ring and/or the drive disk are rotatably supported at least in sections in the separating device. In this connection, the drive ring and/or the drive disc can, for example, simply rest on the separator. But, other types of reception can also be used conveniently. For example, the drive ring and/or the drive disc can be received in the separating device via a rail system or comprise other sliding aids or sliding elements, whereby a displacement of the drive ring is facilitated. drive or drive disk in the separating device.

The drive device and/or at least one filter unit preferably comprise at least one fixing device. In this connection, by means of such a fastening device, which is preferably formed correspondingly between the drive device and the filter unit, a contact between the entraining device and the filter unit is provided. Thus, it is achieved that a displacement or rotation of the drive ring or the drive disc or the drive device is accompanied by a displacement of the filter units. Such a fastening device or a fastening between the filter unit and the drive device can be achieved, for example, as a hook, a drive or as another fastening element with corresponding recesses. An adhesive connection, in particular a reusable adhesive connection such as Velcro or also a ribbed ring or the like, can also be used as the connection between the drive device and the filter units.

Particularly preferably, at least one preferably removable closing device is provided for closing the recess in the separating device. Thus it is achieved that a technically flow-tight separation device is provided except for the passage in the separation device.

In expedient embodiments, at least one filter unit is arranged in the closure device. In this connection, at least one filter unit and the closing device are provided as a common unit, so that, depending on the configuration, for example, the last filter unit is used together with the closing device in the annular receiving space.

The method according to the invention is suitable for changing filter units from the annular receiving space of an extractor hood, as described above. In this connection, at least one filter unit is removed from the receiving space through the recess in the separating device.

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

Preferably, at least one filter unit is moved within the receiving space to the removal device in the separating device by movement of the pulling device to remove the filter unit.

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

In this connection, 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 the movement of the drag device. Alternatively, when inserting a filter unit, it can also be manually moved away from the area of the recess in the separating device. Preferably, alternatively, when removing the filter, a filter unit can only be moved in sections by means of the pulling device until it can be reached by hand and can then also be pulled by hand into the recess.

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

The recess in the spacer is preferably released by removal of the closure device and/or closed by insertion of the closure device.

In this connection, it is especially 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. Thus, in particular, it is achieved that at least one filter unit can be arranged in the region of the recess.

In expedient developments, the filter unit is inserted through the recess in the separating device into the annular receiving space, whereby the filter unit is displaced within the receiving space away from the recess by pressing against the separating unit. filter. By manual pressure against the filter unit or a push against the filter unit or by a motorized movement of the drive device and a resulting push against the filter unit, a filter unit can be moved away from the recess towards a area of the reception space otherwise inaccessible. By pressing manually or by motor against the inserted filter unit, the previously inserted filter units can be further transported, according to the design, by the newly inserted filter unit if they are not displaced by the pulling device .

Other advantages and characteristic features of the present invention can be deduced from the embodiment example explained below with reference to the attached figures.

In the figures, they show:

FIG. 1 is a purely schematic representation of an exemplary embodiment of an extractor hood according to the invention in a perspective view from above;

FIG. 2 is a purely schematic representation of an exemplary embodiment of an extractor hood according to the invention in perspective view from below;

FIG. 3 a purely schematic representation of an exemplary embodiment of an extractor hood according to the invention in a sectional view from the side;

FIG. 4 a purely schematic representation of an exemplary embodiment of an extractor hood according to the invention in an exploded perspective view;

FIG. 5 a purely schematic representation of an exemplary embodiment of an extractor hood according to the invention in an exploded perspective view from above;

FIG. 6 a purely schematic representation of a filter unit in a perspective view; FIG. 7 a purely schematic representation of a filter unit on a closure device; and FIG. 8 a purely schematic representation of filter units in a drive device and a closing device with filter unit in a perspective view.

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

In the exemplary embodiment shown here, the cooker hood 1 is configured as a freely suspended cooker hood 1, which can be fixed to the ceiling, for example, over a kitchen island via three wire ropes 27.

The shown embodiment of an extractor hood 1 according to the invention has a casing device 2 with an upper casing cover 29, inside of which a treatment section 3 is made available for treating the sucked vapors. In this connection, the treatment section 3 has a round cross section 4, where a round cross section is considered here essentially transverse to the suction direction.

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

The considered extractor hood 1 is configured for the recirculating air mode, for which the extractor hood 1 has an inlet opening 5 through which the rising vapors in the extractor hood 1 are sucked in. In addition, several intake openings are provided. outlet 6 on the upper side of the extractor hood, through which the treated air is blown back into the kitchen.

In the exemplary embodiment shown here, a decorative panel 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. Thus, the vapors they are sucked through the grease filter 21 by means of a ventilation device 10 not visible in figures 1 and 2, so that the interior of the extractor hood 1 is traversed by air as free of grease as possible.

FIG. 3 shows a purely schematic cross section through an exemplary embodiment of an extractor hood 1 according to the invention. It is recognized here that, in this exemplary embodiment, the extractor hood 1 also has an essentially dome-shaped configuration, in which the cross-section 4 of the treatment section 3 is shaped round.

Furthermore, it is recognized that the treatment section 3 inside 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. In this regard, the separating device 7 it is essentially flow-tight in design. However, in the separation device 7 in the exemplary embodiment shown, a passage 26 is provided, through which a technical flow connection is provided between the lower inlet section 8 and the upper discharge section 9.

In the exemplary embodiment shown here, a ventilation device 10 is provided above this passage 26, by means of which air is sucked through the grease filter 21 into the lower intake section 8 and then blown out. return to the kitchen through the upper discharge section through the outlet openings 6. The air guidance inside the extractor hood is indicated purely schematically by the dashed arrows.

By arranging the ventilation device 10 in the upper discharge section 9, an essentially annular receiving space 11 is created 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 ventilation device 10 then blows the air already released from the fat components into the upper discharge section and presses the air through the ventilation units. filter 12 through the outlet openings 6 back to the kitchen.

In FIG. 4, an exemplary embodiment of an extractor hood 1 according to the invention is shown in a perspective view from below, in which the decorative panel 20 is shown removed from the inlet opening. 5 together with the grease filters 21 to give a view into the lower inlet section 8 and into the separation device 7.

It can be seen from FIG. 4 that a separating device 7 is provided within the treatment section 3, which is basically designed to be flow-tight. Here, a passage 26 is provided in the center, through which air can be conveyed to the upper discharge section 9 or to the annular receiving space 11 by means of the ventilation device 10 arranged above.

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

By means of the filter units 12 adapted to the annular receiving space 11, they can be fed into the annular receiving space 11 through the recess 13 and then moved transversely to the radius of the treatment section 3 in an otherwise inaccessible area 19 of the space. ring reception 11.

When all the intended filter units 12 have been inserted into the annular receiving space 11, the recess 13 can be closed by means of a closing device 18, so that the passage 26 exists as the only technical flow connection between the upper section 9 and 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 closing device 18. For this, this filter unit 12 and the closing device 18 are provided as a common constructional unit, in which here the filter device 12 is screwed into the closing unit 18.

In order to move or displace the filter units 12 from the otherwise inaccessible areas 19 into the recess 13, a drive device 14 is provided in the exemplary embodiment shown here, which here comprises a drive ring 15 or a drive disk. drive 16. In this connection, this drive ring 15 is arranged radially outwardly in the annular receiving space 11, in which the filter units 12 are also displaced in the direction of rotation by rotating the drive ring 15 to through the separating device 7. Thus, a displacement of the filter units 12 can be achieved through the drive ring 15 or a drive disc 16, even if the filter units 12 themselves cannot be reached.

In FIG. 5, the embodiment according to FIG. 4 is shown in a perspective view from above, in which the upper housing cover 29 shown in FIG. upper evacuation 9 or the annular receiving space 11.

Here, too, the recess 13 is recognizable, through which filter units 12 can be fed into and removed from the annular receiving space 11. In this view, the closure device 18 is also visible as a common constructional unit, together with the one with a filter unit 12.

Furthermore, it is recognized that the interior space of the decorative panel 20 is divided into four sections, in which a grease filter 21 is respectively arranged. The decorative panel 20 also comprises fixing tabs 30, through which the decorative panel 20 engages in the corresponding reception in the lower inlet section 8 of the treatment section 3. In addition, a latch 31 is provided.

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

In FIG. 7 it is again shown that a filter unit 12 can be formed as a common unit with the closing device 18, in which the filter frame 22 of the filter unit 12 is fixed on the closing device 18. or is screwed with this.

In FIG. 8, the driver 14 is shown purely schematically, which is designed here as a driver ring 15 or as a driver disk 16. In the installed state, this driver 14 or driver disk 15 rests on the separation device 7 in the upper discharge section 9 in the exemplary embodiment shown here. As can be seen, the drive ring 15 is dimensioned in such a way that it is located 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, an engagement of the filter units 12 takes place in the drive device 14. For this, a clamping device 17 is provided, which, in The exemplary embodiment shown here comprises a fixing element 25 on the filter unit 12 or on the filter frame 22 and a fixing element 24 on the driver 14.

In this connection, hook-shaped structures are provided here as fastening elements 25 on the filter units 12, which engage in fastening elements 24 formed as recesses in the drive ring.

In this way, it is achieved that when the driving ring 15 is rotated or displaced, the filter units 12 that engage in it are also displaced, so that they can be displaced up to the recess 13 of the separating device 7.

By inserting the filter units 12 into the annular receiving space 11 through the recess 13, they can also be displaced again by means of a turning movement of the drive device 14 or the drive ring 15.

However, during insertion, it is also possible that the filter units 12 are manually pushed or pressed out of the recess 13 transversely to the radius of the treatment section 3 into the annular receiving space 11. The already inserted filter units 12 follow one another. conveying by pushing the next filter unit and can be moved into an otherwise inaccessible area 19 .

In all configurations it is possible to shape the extractor hood 1 or the drive device 14 in such a way that it can be moved manually and/or motorized or automatically to move the filter units 12 within the annular receiving space 11.

reference list

1 extractor hood

2 housing device

3 treatment section

4 Cross section

5 Inlet opening

6 outlet opening

7 Separation device

8 Lower Section

9 Upper Section

10 Ventilation device

11 Annular receiving space

12 filter unit

13 Rebate

14 drag device

15 Drive Ring

16 drive disc

17 Fixation device

18 Closing device

19 Inaccessible area

20 Decorative panel

21 Grease filter

22 filter frame

23 filter element

24 Fixing element

25 Fixing element

26 step

27 wire rope

28 Odor filter

30 Retaining Tab

31 Interlock

Claims (13)

1. Extractor hood (1) comprising at least one housing device (2) with at least one treatment section (3) with a round cross-section (4) and with at least one inlet opening (5) for sucking in vapors and with at least one outlet opening (6) to evacuate the treated air, in which at least one flow-tight separation device (7) is arranged in the treatment section (3), which divides the treatment section (3) into at least one lower inlet section (8) with the opening for inlet (5) and at least one upper evacuation section (9) with the outlet opening (6), in which at least one passage (26) is provided in the separating device (7) as a connection between the discharge section lower inlet (8) and upper evacuation section (9), in which at least one ventilation device (10) is arranged in the passage (26), which sucks in air from the inlet opening (5) and evacuates it in the direction of the outlet opening (6), in which at least one annular receiving space (11) suitable for receive at least two filter units, which is accessible at least in sections through at least one recess (13) in the separating device (7) in order to remove and/or introduce the filter units through this recess (13 ), characterized by the extractor hood (1) comprises at least two filter units (12) and at least one drive device (14), which is provided in the upper evacuation section (9) to move the filter units (12) inside the annular receiving space (11) to move them from an inaccessible area (19) of the annular receiving space (11) towards the recess (13). Extractor hood (1) according to claim 1, characterized in that the drive device (14) comprises at least one drive ring (15) and/or at least one drive disk (16). Cooker hood (1) according to the preceding claim, characterized in that the drive ring (15) and/or the drive disk (16) are rotatably arranged in the receiving space (11). Cooker hood (1) according to one of the two preceding claims, characterized in that the drive ring (15) and/or the drive disk (16) are rotatably supported at least in sections in the separation (7). Extractor hood (1) according to one of the two preceding claims, characterized in that the drive device (14) and/or at least one filter unit (12) comprise at least one fixing device (17). Cooker hood (1) according to the preceding claim, characterized in that at least one closing device (18) is provided for closing the recess (13) in the separating device (7). Cooker hood (1) according to the preceding claim, characterized in that at least one filter unit (12) is arranged in the closing device (18). Extractor hood (1) according to one of the preceding claims, in which the displacement of the filter units (12) is carried out motorized or automatically and/or manually by means of the drive device (14). Method for changing filter units (12) of the annular receiving space of an extractor hood according to one of the preceding claims, characterized in that at least one filter unit (12) is removed from the receiving space (11 ) through the recess (13). Method according to the preceding claim, characterized in that at least one filter unit (12) is moved within the receiving space (11) towards the recess in the separating device (7) by means of the movement of the drive device ( 14). Method according to one of the preceding method claims, characterized in that in the case of an extractor hood (1) according to one of claims 6 to 8, the recess (13) in the separating device (7 ) is released by withdrawal of the closure device (18) and/or closed by insertion of the closure device (18). Method according to the preceding method claim, characterized in that at least one filter unit (12) is removed and/or inserted together with the closing device (18). Method according to one of the preceding method claims, characterized in that the filter unit (12) is inserted through the recess (13) in the separating device (7) into the receiving space (11) and in that the filter unit (12), within the receiving space, is moved away from the recess by pressure against the filter unit.