EP2772695B1 - Extractor hood - Google Patents

Description

Field of the invention

The present invention relates to an extractor hood with a grease filter, a suction system for applying negative pressure to this grease filter in order to convey gases to be cleaned, in particular air contaminated by cooking vapors, through this grease filter, and with a cover which reduces the suction effect of the suction system to gap-shaped Limited openings at the edge of the trigger.

background

Extractor hoods with edge extraction are well-known products for private kitchen facilities and are commercially available. Extractor hoods of this type are typically mounted on a wall above the hob or attached to the ceiling above the hob.

Other extractor devices for domestic kitchens, which are arranged next to the hob, are known, in which, also in normal operation, the air is first sucked through an air gap into the extractor and after being drawn into the extractor Diversion undergoes in order to be transported in the direction of the location of the grease filter. Examples of these devices are commercially available under the names "table hood" or "downdraft hood".

With this type of extractor hood with edge extraction, it can happen during operation that residues, which are transported by the sucked in air, settle in the air duct between the suction gap and the grease filter in the exhaust duct or air duct. Such deposits are undesirable and result in contaminants that are difficult to remove.

In contrast to larger, commercial extractor hoods, extractor hoods for private kitchen facilities are normally not designed to be cleaned regularly (daily), for example by hosing them down and / or by using abrasives.

In EP 2 420 736 describes a filter unit for an extractor hood with a front panel and at least one filter element. The filter unit comprises a collecting space for collecting contaminants, the collecting space being at least partially formed by a cover rail which is connected to the front panel. Further state of the art is the documents EP 2 420 738 and EP 1 624 254 refer to.

There is therefore the task of designing extractor devices with edge suction for private kitchen facilities in such a way that undesired deposits, in particular grease residues, can be easily removed.

Presentation of the invention

According to the present invention, an extractor device with edge suction is provided which has at least one gap-shaped intake opening for sucked air, which runs along an outer The edge of a central air-impermeable cover plate runs, a hood screen with at least one central air-permeable grease filter, which closes a vent or chimney, at least a central area of the grease filter (and the hood screen) being shielded during operation by the cover plate from a hotplate and with the slit-shaped intake opening is connected by an air duct, the inner boundary surfaces of which are air-impermeable surfaces of the hood screen and the air-impermeable cover plate, the boundary surfaces being shaped so that the boundary surfaces opposite the slot-shaped intake opening deflect an air flow entering the slot-shaped intake opening by at least 45 degrees, the deflecting parts the boundary surfaces of the air duct opposite the gap-shaped intake opening at least partially from a one that can be separated and reinserted from the rest of the hood screen and the cover plate form etched part.

An element has a shielding or covering effect within the meaning of the invention if it interrupts the straight movement of the cooking vapors from the place where they arise, i.e. the cooking area, to the shielded element and thus forces the sucked in air to make a detour through the gap-shaped intake opening.

The extractor device is preferably an extractor hood without a movable pull-out, i.e. an extractor hood in which the cover plate and the rest of the hood screen are not moved relative to one another during operation, or in which the slot-shaped intake opening is a constant distance from the grease filter. Nevertheless, the cover plate can be movably mounted on the fume hood device or can be separated and reinserted, especially in embodiments in which the insert part is partially covered by the cover plate in the operational state, and the separation or reinsertion of the Insert part is blocked by the cover plate in its closed, operational state. With such a configuration of the cover plate and insert part according to the invention, the insert part cannot be separated from the rest of the extractor device when it is closed and ready for operation. Therefore, for cleaning, the cover plate is first moved from an operating position to a maintenance position or separated from the extractor device.

By using an insert, the surfaces that limit the air gap and on which grease residues are increasingly deposited can be cleaned with the insert separately from the rest of the extractor hood. For this purpose, the material of the insert is preferably dishwasher-safe, e.g. made of stainless steel or a resistant plastic.

The insert part preferably has magnetic fastening means which detachably connect the insert part to the rest of the extractor hood device. The fastening means are preferably shaped in such a way that they prevent the insert part from slipping along the hood screen. For this purpose, the insert part preferably also has positioning means which interact with positioning means on the rest of the extractor hood and define the position of the insert part when it is inserted and preferably prevent the insert part from slipping in the inserted state. These positioning means can, for example, be positive and negative profiles or contour surfaces adapted to one another on the insert part and the corresponding contact surfaces of the hood screen. In a preferred embodiment, the fastening means and the positioning means are combined in one place.

If, for example, the cover is in its maintenance position or is separated from the rest of the extractor hood, the insert is accessible and can be cleaned by the user simply by pulling on the magnetic attachment separated from the extractor hood. For this purpose, the insert part preferably also has one or more handles.

In embodiments in which the slot-shaped intake opening is longer and, for example, runs around the cover plate or consists of several parts, several insert parts can also be used instead of one insert part. The insert parts are preferably identical in construction and interchangeable with one another. A longer section of the intake opening, for example an all-round intake gap of an extractor hood suspended above the hob, can thus have two or more identical insert parts.

The insert part or the insert parts and the grease filter or the grease filters of the extractor device are preferably designed as separate components of the extractor device. For some extractor devices, however, it can be advantageous if the grease filter and the insert part form a single component, so that the insert part forms a preferably air-impermeable extension of the grease filter and is separated with it from the rest of the extractor device for cleaning.

Due to its function, the insert is arranged at the entrance of the air duct to the central grease filter. It can therefore also have grease traps, for example in the form of grids made of expanded metal, which extend into the air duct or are arranged transversely to the air duct.

According to this invention, the extractor hood device is particularly preferably an extractor hood with a peripheral suction device and is designed in such a way that it is attached above the hotplate in the operating state. In this embodiment, the cover plate is preferably connected to the rest of the extractor device by means of hinges and becomes the Cleaning of the insert parts folded down by the user. The device according to the invention can, however, also be used on other types of extractor devices, for example on table hoods or downdraft hoods.

In the case of larger extractor devices, the cover plate can also consist of several parts.

The extractor device also has, in a known manner, a fan in the exhaust duct or chimney for generating a negative pressure. It can also have additional filters mounted in the exhaust duct, especially in recirculation mode.

Brief description of the drawings

• FIG. 1A und 1B eine perspektivische Ansicht einer bekannten Dunstabzugshaube mit Randabsaugung und beweglich aufgehängter Abdeckplatte im geschlossenen, betriebsbereiten Zustand (FIG. 1A) bzw. im geöffneten, reinigungsbereiten Zustand (FIG. 1B);
• FIG. 2A eine perspektivische Ansicht einer Dunstabzugshaube gemäss eines Beispiels der Erfindung im geöffneten, reinigungsbereiten Zustand;
• FIG. 2B ein Detail der Dunstabzugshaube in FIG. 2A;
• FIG. 2C einen vertikalen Schnitt der Dunstabzugshaube in FIG. 2A;
• FIG. 3A - 3C weitere Illustrationen der prinzipiellen Wirkungsweise der Erfindung;
• FIG. 4 die perspektivische Darstellung eines Einsatzteils gemäss eines Beispiels der Erfindung in drei verschiedenen Orientierungen;
• FIG. 5A - 5C verschiedene Stufen bei der Entnahme eines Einsatzteil zum Reinigen in schematischen Querschnitten bzw. einer perspektivischen Ansicht; und
• FIG. 6 und 7 schematische Ansichten weiterer Beispiele gemäss der Erfindung.

Further refinements, advantages and applications of the invention emerge from the dependent claims and from the description that follows with reference to the figures. Show:

• FIG. 1A and 1B a perspective view of a known extractor hood with edge extraction and movably suspended cover plate in the closed, operational state ( FIG. 1A ) or in the open, ready-to-clean state ( FIG. 1B );
• FIG. 2A a perspective view of an extractor hood according to an example of the invention in the open, ready-to-clean state;
• FIG. 2 B a detail of the extractor hood in FIG. 2A ;
• FIG. 2C a vertical section of the hood in FIG. 2A ;
• FIG. 3A-3C further illustrations of the principle mode of operation of the invention;
• FIG. 4th the perspective view of an insert according to an example of the invention in three different orientations;
• FIG. 5A-5C various stages in the removal of an insert for cleaning in schematic cross-sections or a perspective view; and
• FIG. 6th and 7th schematic views of further examples according to the invention.

Ways of Carrying Out the Invention

A schematic perspective full view of a known extractor hood 10 is shown in FIG Figures 1A and 1B shown. The hood consists of an exhaust duct or chimney part 11 and a lower hood screen 12 which is firmly connected to the exhaust duct 11 and to which a hinged cover plate 13 is attached. It shows FIG. 1A the extractor hood when closed and FIG. 1B the extractor hood when it is open. An extractor hood of this type is installed over a cooking range, for example, and can typically be configured in an extraction mode or in a recirculation mode. In recirculation mode, the sucked in air is conveyed back into the room through an opening 111 with an additional odor-absorbing filter in the chimney 11.

The hood shade 12 has an outer frame 120 which protrudes on one side (in the example shown, the underside) over the central inner surface and thus forms a circumferential edge on this side. The cover plate 13 serves as an air-impermeable baffle, so that in the closed state ( FIG. 1A ) the air is only sucked in through the circumferential gap 121 between the outer edge of the cover plate 13 and the circumferential edge of the frame 120 of the hood shade 12. The cover plate 13 can, for example, made of glass, plastic or Made of metal. In the example shown, the cover plate 13 also has inwardly directed spacers 131. The dimensions of the spacers 131 define the height of the air channel between the intake gap 121 and the centrally arranged intake opening in the chimney 11. The air channel is essentially delimited by the inner underside of the hood shade 12 and the inner surface of the cover plate 13, which is oriented upward when closed. The air duct enables air which is sucked in through the intake gap 121 to flow to the center of the hood screen 12 and can be sucked through the grease filter 123 into the chimney 11. In the operating state, the outer surface of the cover plate 13 is directly exposed to the vapors from the hob and shields the central area of the extractor hood with the grease filter 123 from these vapors.

For cleaning or maintenance, the cover plate 13 is used as in FIG. 1B shown folded down. In this state, both the lamps 122 and the central grease filter 123 are accessible. If the grease filter 123 needs cleaning, it can be used as in FIG. 1B indicated, can be removed with the cover plate 13 of the extractor hood 10 open and cleaned in this separate state, for example in a dishwasher.

In the FIG. 1A and 1B Elements or modes of operation of an extractor hood shown and described above are known. In the following, an example according to the invention is based on the in FIG. 1A and 1B illustrated extractor hood 10, elements that are common to the examples or that correspond in their function with the same reference numerals as FIG. 1A and 1B Marked are.

In the FIG. 2A and 2B The extractor hood 10 shown also has a chimney 11, a fixed hood shade 12 and a hinged cover plate 13. The grease filter 123 consists of 3 parts, each Part of the hood screen 12 can be detached for cleaning. The extractor hood 10 shown also has three lamps 122 in the hood shade 12.

On the inner surface of the hood screen 12, five identical insert parts 124 are attached. These are attached to the surface or surfaces of the hood screen 12 between the grease filter 123 and the inner edge of the surrounding frame 120.

Two of these insert parts 124 in one corner of the hood screen 12 are in the enlarged section of FIG FIG. 2 B shown. The insert parts 124 are arranged such that when the extractor hood 10 is ready for operation, ie when the cover hood 13 is closed, they at least largely form the inner surface (s) opposite the air gap 121 at the beginning of the air duct 125.

This aspect of the inserts 124 is also shown in FIG FIG. 2C visible, which shows a vertical section through the center of the extractor hood 10. The extractor hood 10 is designed for wall mounting in this example. In this variant, the hood screen 12 forms an essentially U-shaped screen around the central chimney 11, which is mounted directly on the wall. In FIG. 2C the fan 112 is shown in the chimney 11, with which the kitchen vapors or vapors are sucked through the intake gap 121 into the extractor hood. The intake to the chimney 11 is covered by the grease filter 123. The grease filter 123 is designed in such a way that it extends over part of the circumferential intake gap 121. In the case of a typical wall mounting of the extractor hood 10, this part of the circumferential intake gap 121 is that part which runs along the wall.

The remaining sections or parts of the circumferential intake gap 121 are, however, as shown, delimited by the insert parts 124, which are the side surfaces or boundary surfaces of the Form hood umbrella 12 in the immediate vicinity of these sections of the intake gap 121.

The air flows when the fan 112 is on are shown in FIG FIG. 2C marked by arrows. As shown, the air in the area of the intake gap 121 close to the wall passes directly through the grease filter 123 into the chimney space without being deflected.

Along the remaining sections of the intake gap 121, after passing through the intake gap 121, the air drawn in is initially conveyed in the air duct 125 between the inner surface of the hood screen 12 and the cover plate 13 in the direction of the chimney 11 and passes through the grease filter 123 there. It can be observed that the air which passes through the remaining sections of the intake gap 121 is deflected immediately after the intake gap.

In the schematic FIG. 3A-3C shows the consequences of the deflection of the air in this area and what constitutes the advantages of the present invention. When the extractor hood 10 is in operation, the flow of the sucked in air runs as shown by the arrows. The air flow is sucked through the intake gap 121 between the hood edge 120 and the cover plate 13 into the air duct 125, which runs between the underside of the hood screen 12 and the top of the cover plate 13. In the center of the hood 10, the sucked in air passes the central grease filter 123 and rises up in the chimney 11.

It shows FIG. 3A the basic elements of a well-known extractor hood, such as those in FIG. 1 is shown, ie without insert parts according to the present invention. The deflection of the sucked in air leads to increased deposits of residues 30 precisely on the wall parts which are opposite the intake gap 121. In the case of the extractor hood FIG. 3B on the other hand, the exposed areas on which such deposition 30 takes place are parts of the Insert parts 124 and can be separated, cleaned and reinserted in a simple manner and without tools by the user from the rest of the extractor hood.

The insert 124 of FIG. 3B essentially forms a surface resting on the underside of the hood screen 10 in the entrance area of the air duct 125, in that the sucked-in air is deflected. The insert 124 of FIG. 3C however, additionally has a grid-shaped expanded metal stretched transversely to the air duct 125, on which residues 30 can also be deposited. It should be noted, however, that such an additional fat separator arranged transversely to the air duct 125 can on the one hand increase the efficiency of the fat separation, but on the other hand reduce the suction power of the extractor hood 10 for a given engine output. It can therefore be more advantageous to design the insert 124 in such a way that the air duct 125 remains as free of flow obstacles as possible and (as in the example of FIG FIG. 3B shown) to dispense with additional grease traps at this point.

In FIG. 4th the example of an insert 124 is shown in three different perspective views. An insert part 124 consists essentially of two side plates 124-3, which are connected at their respective opposite edges by a first transverse plate 124-1 and a second transverse plate 124-2. In the inserted state of the insert part 124, the first transverse plate 124-1 forms the wall surface of the hood screen 12 opposite the draw-in gap 121. The second transverse plate 124-2 forms a surface which follows the contour of the cover plate 13 in the closed state or touches it so that in In the operational state, the sucked in air essentially flows through the opening between the two transverse plates 124-1, 124-2 and the two side plates 124-3 and then enters the air duct 125. The separation of grease residues from the air happens primarily on the first transverse plate 124-1.

As in connection with FIG. 3 mentioned, it is also possible to attach additional grease separators between the two transverse plates 124-1, 124-2, for example in the form of a lattice-shaped expanded metal 124-5.

Parts of a magnetic holder 124-4 in the form of a positively shaped profile are also mounted on the first transverse plate 124-1, which in the inserted state of the insert part rests at least partially on the hood screen 12, with which the insert part 124 on the hood screen 12 (in a correspondingly shaped negative profile) is anchored.

In the following, with reference to the FIG.5 the process of removing or (re) inserting an insert 124 as described in FIG FIG. 4th is shown.

The cross-sectional view of FIG. 5A shows the insert 124 in the inserted and operational state and the cover plate 13 also in the closed and operational state. The magnet holder 124-4 is anchored in the hood shield 12 within a recess 126 which is adapted to the positive profile 124-4. Thus, the insert 124 cannot slip in the lateral direction, ie along the hood screen 12.

The cross-sectional view of FIG. 5B shows the insert 124 in a state detached from the hood screen 12, the cover plate 13 for removing the insert 124 being already in the open state, ie folded down in the present example. The insert 124 can be released from its permanent magnetic anchorage 126, 124-4 by a simple pull in the direction perpendicular to the main plane of the hood screen 12. In FIG. 5C are those in the cross-sectional view of FIG. 5B shown elements are shown again in a perspective view. An insert 124 is in shown in a separate state, while further insert parts 124 are shown still anchored in the hood shield 12.

In FIG. 6th an example of a variant of the present invention is shown. The same elements or elements with a similar mode of operation are again marked with the same reference symbols as in the preceding examples. The example shows an extractor hood 10 with a chimney 11 and a fixed hood screen 12. As in the examples described above, the central inner area of the hood screen 12 with the chimney 11 is shielded from the hob by a cover plate 13 so that the cooking vapors or fumes can only be sucked into the extractor hood 10 through a circumferential gap 121.

In contrast to the examples described above, the example demonstrates FIG. 6th however, there is no insert part 124 separate from the central grease filter or from the central grease filters 123 in the region of the hood, which lies opposite the intake gap 121. In the example of FIG. 6A on the other hand, the central grease filter 123 is lengthened so far that its edge regions extend as far as the parts of the hood screen 12 which are opposite the intake gap 121. In this arrangement, the air flow sucked in during operation can be cleaned by the grease filter 123 before it is deflected in the direction of the central chimney 11.

In the example after FIG. 6B on the other hand, the central fat filter 123 remains restricted to an inner area which is essentially determined by the circumference of the chimney 11. The central grease filter 123 after Figure 6B however, has air-impermeable edge regions 123 - 1 which extend as far as the parts of the hood screen 12 which lie opposite the intake gap 121. That is, the deflection of the air sucked in during operation from the air gap 120 into the air duct 125 takes place before the air flows through the grease filter 123. Deposits, which at deflecting the air flow occur, are preferably deposited on the air-impermeable edge regions 123-1 of the grease filter 123.

In the two examples according to FIG. 6th grease residues, which are deposited in the vicinity of the edge region 120 of the hood screen 12 during operation, are also removed when the grease filter 123 is cleaned. Therefore, these examples also represent an improvement in comparison with the known prior art. The grease filter 123 can be fastened to the hood screen 12 in a known manner or likewise with the aid of a magnetic holder, as described in the preceding examples, so that it can be detached and reinserted.

In FIG. 7th it is shown that the present invention can also be applied to other extractor devices with a gap-shaped intake opening and subsequent deflection of the sucked in air, which are not ceiling or wall-mounted. The example of FIG. 7th represents a table extractor hood or downdraft hood 10 (which can be retracted in the vicinity of the hob), which are known as such. Identical elements or elements with a similar mode of operation are marked with the same reference symbols as in the preceding examples. The example shows a table extractor hood 10 with a chimney 11, a fan 112 and a hood screen 12. As in the examples described above, the inner area of the hood screen 12 with the grease filter 123 is shielded from the hob by a cover plate 13 so that the cooking vapors or Vapors can only be sucked into the hood 10 through a horizontal gap 121 running on the upper edge of the table hood. From there, the sucked-in air is deflected in the air duct 125, which in this example runs vertically, between the cover plate 13 and the hood shade 12. As indicated by the arrows, the air that is drawn in then passes through the grease filter 123.

The wall area of the hood screen 12, which is opposite the intake gap 121, has an insert part 124 in which the grease residues of the sucked in air can be deposited. The insert 124 is connected to the remainder of the hood screen 12 by means of a magnetic anchorage 126 and can easily be separated from the hood screen by pulling.

Claims (11)

1. Extractor hood device (10) with edge extraction, comprising at least one gap-shaped intake opening (121) for sucked air, which extends along an edge of a central air-impermeable cover plate (13), a hood screen (12) having at least one central air-permeable grease filter (123) which closes off an exhaust shaft or funnel (11), at least a central region of the grease filter (123) and of the hood screen (12) being shielded from a cooking zone by the cover plate (13) during operation and is connected to the gap-shaped intake opening (121) by an air duct (125), the inner boundary surfaces of which are air-impermeable surfaces of the hood screen (12) and the cover plate (13), and wherein the inner boundary surfaces are shaped such that the boundary surfaces opposite to the gap-shaped intake opening (121) deflect an air flow entering through the gap-shaped intake opening (121) by at least 45 degrees, wherein deflecting portions of the boundary surfaces opposite to the gap-shaped intake opening (121) form at least partially the boundary surfaces of the air duct (125),
   characterized in that the extractor hood device (10) comprises at least one insert part (124) which forms the deflecting parts and can be separated from the rest of the hood screen (12) and the cover plate (13) and reinserted.
2. Extractor hood device (10) according to claim 1, wherein the edge of the central air-impermeable cover plate (13) also forms an edge of the gap-shaped intake opening (121).
3. Extractor hood device (10) according to claim 1 or 2, wherein the insert part (124) in the area of the air duct (125) is kept free of filter elements or grids, which are oriented transversely to the air duct (125).
4. Extractor hood device (10) according to claim 1 or 2, wherein the insert part (124) has a grease separator (124-5) oriented transversely to the air duct (125).
5. Extractor hood device (10) according to one of the preceding claims, wherein the insert part (124) and the hood screen (12) have a mutual fastening (124-4, 126) which is releasable by pulling and lockable by pressing.
6. Extractor hood device (10) according to claim 5, wherein the fastening comprises a negative profile (126) in a wall of the hood screen (12), which is adapted to a positive profile (124-4) of the insert part (124) .
7. Extractor hood device (10) according to claim 5 or 6, wherein the fastening (124-4, 126) comprises at least one (permanent) magnetic element.
8. Extractor hood device (10) according to one of the preceding claims, wherein the cover plate (13) covers a part of the insert part (124) in operation and is movably or without auxiliary means detachably attached to the hood screen (12).
9. Extractor hood device (10) according to one of the preceding claims, wherein the extractor hood device (10) is an extractor hood configured for wall mounting or ceiling mounting with a central funnel (11) which is surrounded on at least three sides by the hood screen (12).
10. Extractor hood (10) according to one of the preceding claims, wherein the insert part (124), which can be separated from the extractor hood device (10) for cleaning and inserted again, consists of dishwasher-proof material.
11. Extractor hood (10) according to one of the preceding claims, comprising a plurality of identically constructed insert parts (124) which, in the inserted operational state, are distributed along the gap-shaped intake opening (121).

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