EP1944553B1 - Device for extracting cooking vapours with flat duct extractor system - Google Patents

Abstract

A built-in kitchen has a cooking stove with a horizontal array of electrical hotplates or gas burners in the same plane as an extractor outlet aperture. The aperture has a hinged cover that retracts on opening into the duct, where it acts as a baffle plate guide to the incoming air vapors, directing them through a horizontal outlet.

Description

The present invention relates to a device for the extraction of cooking fumes in vertically below a cooking field level direction with a particularly streamlined and low-resistance exhaust duct with very low space requirement, with the features specified in the preamble of claim 1.

Devices for the extraction of cooking fumes are known from the prior art, in which the cooking fumes formed on a hob are sucked down in the vertical direction.
There, extracted from the cooktop cooking fumes are supplied to a fan in a tubular exhaust duct, wherein the local tubular exhaust duct extends vertically through the local extraction device receiving kitchen furniture.

These known suction devices are disadvantageous in particular because, when integrated into a kitchen furniture, the unobstructed kitchen furniture interior available for drawers, compartments or storage purposes is installed in particular by the vertically oriented, tubular exhaust duct in not usable for drawers or compartments is.

Another disadvantage of this belonging to the prior art suction with tubular, within a kitchen cabinet vertically extending exhaust ducts is that there the large suctioned in the cooking hob cooking fume stream must be concentrated on the small cross-section of the tubular exhaust duct, which is where the flow resistance within the suction device is considerable.
To compensate for the local increased flow resistance particularly powerful and therefore expensive fans are required, which is associated with increased consumption of expensive operating energy.

From the US 3002513 A goes out a suction device for cooking fumes, in which a hob a hemispherical enclosing from below suction the vacuum rising from a set off on the hob cookware cooking fumes should suck vertically downwards. This known suction device comprises a first, below the hob extending, plate-shaped wall and a second spaced therefrom spaced, below the hob extending, plate-shaped wall, the cooking fumes sucked through the hemispherical gap between the first wall and the second wall down and a suction pipe attached obliquely from the side to the second wall are supplied.

This device is particularly disadvantageous because it sucks only the rising from the edge region of the cookware cooking fumes, but not rising from the middle region of the cookware cooking fumes.

Another disadvantage of this device is the fact that there extensive turbulence occur especially in the region of the lateral connection of the suction tube, which represent a considerable flow resistance, which has a disturbing noise during aspiration and the use of large, powerful and energy-consuming fan motors required.

The from the US 3002513 A known device is also disadvantageous because from the cookware overflowed liquid from the local, the edge of the cookware circular and from below comprehensive device is literally "collected" and a cleaning possibility of the interior of the then dirty trigger device there is basically not given.

Another drawback of this device for vacuuming cooking fumes is that it requires the user to make a restrictive fixation on a particular cookware size. Because the diameter of the circular cooking vapor suction device in the plan view limits the Diameter of the cookware used there and also prohibits the otherwise usual, simultaneous use of two adjacent cooktops for heating an elongated fish-breeder.

From the US 3766906 A A cooking fume hood system emerges for several side-by-side grills in a restaurant. In this cooker hood extraction system, the cooking fumes rising from the respective grill are first of all sucked horizontally to the side and then downwards by means of a flow baffle projecting upward above the table surface, and then fed to a main suction tube leading to the outside. The cooking fume inlet area of this cooker extractor has a several sharp-edged 90 ° -Knicke exhibiting piping system, which causes a very turbulence-intensive and thus flow-resistant leadership of extracted cooking vapor vapors.

The object of the present invention is therefore to provide a device for the extraction of cooking fumes in vertically below a cooking field level direction, which can be used for drawers, shelves or storage purposes interior of the extractor device receiving kitchen furniture largely unobstructed and thus particularly space-saving and space-saving integrated into kitchen furniture is and their intrinsic flow resistance is particularly low and therefore the use of - compared to the high-performance fans used in cooking extractor devices of the prior art - particularly small fans with very low power consumption and noise allowed.

According to the invention this object is achieved in a generic device by the features stated in the characterizing part of patent claim 1. Particularly preferred embodiments are the subject of the dependent claims.

• Figur 1 eine schematische, perspektivische Ansicht einer erfindungsgemäßen Kochdunst-Abzugsvorrichtung von schräg rechts oben, deren Abluft-Flachkanal zunächst in Richtung der Rückwand des Küchenunterschrankes 90°-winkelig gebogen nach hinten verläuft und anschließend durch ein Flachkanal-Zwischenstück weiter nach hinten geführt wird, um dann über ein weiteres Flachkanal-Zwischenstück eine 90°-Umlenkung nach unten zu erfahren, wobei im unteren Teil der Figur 1 ein Küchenunterschrank mit zwei Kochfeldern in teilweise geschnittener Form dargestellt ist, zwischen denen die im oberen Teil der Figur 1 dargestellte Kochdunst-Abzugsvorrichtung eingesetzt ist;
• Figur 2 eine Seitenansicht der in Figur 1 dargestellten Kochdunst-Abzugsvorrichtung, wobei im unteren Teil der Figur 2 die Seitenansicht eines Küchenunterschrankes dargestellt ist, in welchen die in den oberen Teilen der Figuren 1 und 2 dargestellte Kochdunst-Abzugsvorrichtung eingesetzt ist;
• Figur 3 eine frontwärtige Vorderansicht der in den Figuren 1 und 2 dargestellten Kochdunst-Abzugsvorrichtung, wobei im unteren Teil der Figur 3 die Vorderansicht eines Küchenunterschrankes dargestellt ist, in welchen die in den oberen Teilen der Figuren 1 und 2 dargestellte Kochdunst-Abzugsvorrichtung eingesetzt ist;
• Figur 4 eine Draufsicht auf einen Küchenunterschrank mit zwei nebeneinander angeordneten Kochfeldern, zwischen denen eine in den Figuren 1, 2 und 3 dargestellte Kochdunst-Abzugseinrichtung vorgesehen ist;
• Figur 5 eine schematische, perspektivische Ansicht von schräg rechts oben von zwei nebeneinander vorgesehenen, erfindungsgemäßen Kochdunst-Abzugsvorrichtungen, deren Abluft-Flachkanäle zunächst in Richtung der Rückwand des Küchenunterschrankes 90°-winkelig gebogen nach hinten verlaufen und anschließend durch jeweils ein Flachkanal-Zwischenstück weiter nach hinten geführt werden, um dann über jeweils ein weiteres Flachkanal-Zwischenstück eine 90°-Umlenkung nach unten zu erfahren, wobei im unteren Teil der Figur 5 ein Küchenunterschrank mit drei Kochfeldern in teilweise geschnittener Form dargestellt ist, zwischen denen die im oberen Teil der Figur 5 dargestellten beiden Kochdunst-Abzugsvorrichtungen eingesetzt sind;
• Figur 6 eine frontwärtige Vorderansicht der in Figur 5 dargestellten beiden nebeneinander angeordneten Kochdunst-Abzugsvorrichtungen, wobei im unteren Teil der Figur 6 die Vorderansicht eines Küchenunterschrankes dargestellt ist, in welchen die in den oberen Teilen der Figuren 5 und 6 dargestellte Kochdunst-Abzugsvorrichtung eingesetzt ist;
• Figur 7 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher der Anfangsabschnitt eines Abluftkanales von schräg links unten an eine Kochdunst-Eintrittseinrichtung ansetzt, wobei das Verschließelement der Kochdunst-Eintrittseinrichtung in Bezug auf dessen Drehachse in die 4-Uhr-Position zur Seite geschwenkt ist;
• Figur 8 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher der Anfangsabschnitt eines Abluftkanales von schräg rechts unten an einer Kochdunst-Eintrittseinrichtung ansetzt und das Verschließelement der Kochdunst-Eintrittseinrichtung in Bezug auf dessen Drehachse in die 8-Uhr-Position zur Seite geschwenkt ist;
• Figur 9 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher der Anfangsabschnitt eines Abluftkanales von schräg links unten an einer Kochdunst-Eintrittseinrichtung ansetzt, die verwirbelungsfreie Umlenkung der eintretenden Kochdünste durch die konkav gewölbte Wandung der Kochdunst-Eintrittseinrichtung in 3-Uhr-Position von der Drehachse des Verschließelements erfolgt und wobei das Verschließelement der Kochdunst-Eintrittseinrichtung in Bezug auf dessen Drehachse in die 9-Uhr-Position zur Seite geschwenkt ist;
• Figur 10 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher der Anfangsabschnitt eines Abluftkanales von schräg rechts unten an eine Kochdunst-Eintrittseinrichtung ansetzt, wobei die verwirbelungsfreie Umlenkung der eintretenden Kochdünste durch die konkav gewölbte Wandung der Kochdunst-Eintrittseinrichtung in 9-Uhr-Position von der Drehachse des Verschließelements erfolgt und wobei das Verschließelement der Kochdunst-Eintrittseinrichtung in Bezug auf dessen Drehachse in die 3-Uhr-Position zur Seite geschwenkt ist;
• Figur 11 eine schematische Draufsicht auf eine erfindungsgemäße Abzugsvorrichtung mit einem als Überlaufschutz ausgebildeten Einbaurahmen, welcher die obenliegende Eintrittsöffnung der Kochdunst-Eintrittseinrichtung umlaufend umfasst und eine seitliche Aussparung für das Drehrad für das Verschließelement aufweist;
• Figur 12 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher ein drehbares Verschließelement die Eintrittsöffnung der Kochdunst-Eintrittseinrichtung in Bezug auf die Drehachse in einer 12-Uhr-Position verschließt;
• Figur 13 eine schematische perspektivische Ansicht einer erfindungsgemäßen Abzugsvorrichtung von schräg links oben mit einem verkürzt dargestellten Anfangsabschnitt und einem weiterführenden Abschnitt eines Abluftkanales;
• Figur 14 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher der Verlauf der isobaren, laminaren Strömungslinien eingezeichnet ist;
• Figur 15 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher das drehbare Verschließelement die Eintrittsöffnung der Kochdunst-Eintrittseinrichtung in Bezug auf die Drehachse in 12-Uhr-Position verschließt, während sich das Gegengewicht zum Ausgleich des Eigengewichtes des Verschließelements in Bezug auf die Drehachse in 6-Uhr-Position befindet und in dieser Position durch einen an dem Gegengewicht angebrachten, ersten Positionierungs-Magneten in Wechselwirkung mit einem gehäuseseitigen Positionierungs-Magneten magnetisch arretiert ist;
• Figur 16 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher das drehbare Verschließelement die Eintrittsöffnung der Kochdunst-Eintrittseinrichtung in Bezug auf die Drehachse in 3-Uhr-Position freigibt, während sich das Gegengewicht zum Ausgleich des Eigengewichtes des Verschließelements in Bezug auf die Drehachse in 9-Uhr-Position befindet und in dieser Position durch einen an dem Gegengewicht angebrachten, ersten Positionierungs-Magneten in Wechselwirkung mit einem gehäuseseitigen Positionierungs-Magneten magnetisch arretiert ist;
• Figur 17 einen schematischen Querschnitt durch eine erfindungsgemäße Abzugsvorrichtung, bei welcher das drehbare Verschließelement die Eintrittsöffnung der Kochdunst-Eintrittseinrichtung in Bezug auf die Drehachse in 9-Uhr-Position freigibt, während sich das Gegengewicht zum Ausgleich des Eigengewichtes des Verschließelements in Bezug auf die Drehachse in 3-Uhr-Position befindet und in dieser Position durch einen an dem Gegengewicht angebrachten, ersten Positionierungs-Magneten in Wechselwirkung mit einem gehäuseseitigen Positionierungs-Magneten magnetisch arretiert ist;
• Figur 18 einen schematischen Querschnitt durch eine Kochdunst-Abzugsvorrichtung die nicht Gegenstand dieser Erfindung ist, bei welcher das Verschließelement in Form einer einteiligen, federdruckbeaufschlagten Klappe ausgebildet ist, welche bei Betätigung eines Lüftermotors automatisch unter Freigabe der Eintrittsöffnung der Kochdunst-Abzugsvorrichtung nach unten wegklappt und nach dem Ausschalten des Lüftermotors automatisch und mit einem Verschließen der Eintrittsöffnung der Kochdunst-Abzugsvorrichtung einhergehend, wieder nach oben in die Horizontale hochklappt;
• Figur 19 einen schematischen Querschnitt durch eine Kochdunst-Abzugsvorrichtung die nicht Gegenstand dieser Erfindung ist, bei welcher das Verschließelement in Form von zwei in geschlossenem Zustand dicht aneinanderstoßenden oder überlappenden, schwenktürartigen und jeweils federdruckbeaufschlagten Klappen ausgebildet ist, welche bei Betätigung eines Lüftermotors automatisch unter Freigabe der Eintrittsöffnung der Kochdunst-Abzugsvorrichtung nach unten wegklappen und nach dem Ausschalten des Lüftermotors automatisch und mit einem Verschließen der Eintrittsöffnung der Kochdunst-Abzugsvorrichtung einhergehend, wieder nach oben in die Horizontale hochklappen;
• Figur 20 einen schematischen Querschnitt durch eine erfindungsgemäße Kochdunst-Abzugsvorrichtung mit einem in den stromabwärtigen Abschnitt des weiterführenden Abschnittes des Abluftkanales schräg zur Strömungsrichtung des abgesaugten Kochdunststromes eingesetzten Fettnebel-Filterelement.

Embodiments of the invention will be described in more detail with reference to the drawings. Show it:

• FIG. 1 a schematic, perspective view of a cooking extractor device according to the invention obliquely from above right, the exhaust duct flat channel first 90 ° bent towards the rear wall of the kitchen cabinet 90 ° backwards and then passed through a flat channel spacer further to the rear, then on another flat-channel adapter to learn a 90 ° deflection down, where in the lower part of the FIG. 1 a kitchen cabinet with two hobs in partially cut form is shown, between which in the upper part of the FIG. 1 shown cooking extractor device is used;
• FIG. 2 a side view of in FIG. 1 shown cooker extractor device, wherein in the lower part of the FIG. 2 the side view of a kitchen cabinet is shown, in which in the upper parts of the FIGS. 1 and 2 shown cooking extractor device is used;
• FIG. 3 a frontward front view of the in the FIGS. 1 and 2 shown cooker extractor device, wherein in the lower part of the FIG. 3 the front view of a kitchen cabinet is shown, in which in the upper parts of the FIGS. 1 and 2 shown cooking extractor device is used;
• FIG. 4 a plan view of a kitchen cabinet with two adjacent cooktops, between which one in the FIGS. 1 . 2 and 3 shown cooking extractor device is provided;
• FIG. 5 a schematic, perspective view obliquely from above right of two juxtaposed cooking extractor devices according to the invention, the exhaust flat ducts initially 90 ° bent in the direction of the rear wall of the kitchen cabinet rearwardly and then passed through each a flat-channel adapter further to the rear are then to learn about each another flat-channel intermediate piece a 90 ° deflection down, in the lower part of the FIG. 5 a kitchen cabinet with three hobs is shown in partially sectioned form, between which in the upper part of the FIG. 5 shown two cooking extractors are used;
• FIG. 6 a frontward front view of the in FIG. 5 shown two juxtaposed cooking vapor extraction devices, in the lower part of the FIG. 6 the front view of a kitchen cabinet is shown, in which in the upper parts of the Figures 5 and 6 shown cooking extractor device is used;
• FIG. 7 a schematic cross section through a discharge device according to the invention, in which the beginning portion of an exhaust duct obliquely from the bottom left attaches to a cooking vapor inlet device, wherein the closing element of the cooking vapor inlet device is pivoted with respect to the axis of rotation in the 4 o'clock position to the side;
• FIG. 8 a schematic cross-section through a discharge device according to the invention, in which the beginning portion of an exhaust duct obliquely from the bottom right at a cooking fume inlet means attaches and the closing element of the cooking fume inlet device is pivoted with respect to the axis of rotation in the 8 o'clock position to the side;
• FIG. 9 a schematic cross-section through a discharge device according to the invention, in which the initial portion of an exhaust duct obliquely from the bottom left attaches to a cooking fume inlet device, the turbulence-free deflection of the incoming cooking fumes through the concave curved wall of the cooking fume inlet device in the 3-o'clock position of the axis of rotation Closing occurs and wherein the closing element of the cooking vapor inlet device is pivoted with respect to the axis of rotation in the 9 o'clock position to the side;
• FIG. 10 a schematic cross-section through a discharge device according to the invention, wherein the initial portion of an exhaust duct obliquely from the bottom right attaches to a cooking vapor inlet device, the turbulence-free deflection of the incoming cooking fumes through the concave curved wall of the cooking vapor inlet device in 9 o'clock position of the axis of rotation the closing element takes place and wherein the closing element of the cooking-vapor inlet device is pivoted to the side with respect to its axis of rotation in the 3 o'clock position;
• FIG. 11 a schematic plan view of an extraction device according to the invention with a trained as overflow protection mounting frame, which comprises the overhead inlet opening of the cooking vapor inlet device circumferentially and has a lateral recess for the rotary wheel for the closing element;
• FIG. 12 a schematic cross section through a withdrawal device according to the invention, in which a rotatable closing element closes the inlet opening of the cooking vapor inlet device with respect to the axis of rotation in a 12 o'clock position;
• FIG. 13 a schematic perspective view of a take-off device according to the invention obliquely from the top left with a shortened initial section and a continuing section of an exhaust duct;
• FIG. 14 a schematic cross section through a discharge device according to the invention, in which the course of the isobaric laminar flow lines is located;
• FIG. 15 a schematic cross section through an inventive extraction device, wherein the rotatable closing element closes the inlet opening of the cooking vapor inlet device with respect to the axis of rotation in 12 o'clock position, while the counterweight to compensate for the dead weight of the closing element with respect to the axis of rotation in 6- Clock position and is magnetically locked in this position by a, attached to the counterweight, the first positioning magnet in interaction with a housing-side positioning magnet;
• FIG. 16 a schematic cross-section through a discharge device according to the invention, in which the rotatable closing element, the inlet opening of the cooking vapor inlet device with respect to the axis of rotation in 3 o'clock position releases, while the counterweight to balance the dead weight the shutter member is in the 9 o'clock position with respect to the rotation axis and is magnetically locked in this position by a first positioning magnet mounted on the counterweight in interaction with a housing side positioning magnet;
• FIG. 17 a schematic cross-section through an inventive extraction device, wherein the rotatable closing element releases the inlet opening of the cooking vapor inlet device with respect to the axis of rotation in 9 o'clock position, while the counterweight to compensate for the dead weight of the closing element with respect to the axis of rotation in 3- Clock position and is magnetically locked in this position by a, attached to the counterweight, the first positioning magnet in interaction with a housing-side positioning magnet;
• FIG. 18 a schematic cross section through a cooker extractor which is not the subject of this invention, in which the closing element is in the form of a one-piece, druckdruckbeaufschlagten flap which automatically folds upon actuation of a fan motor releasing the inlet opening of the cooker hood-down device and after switching off the fan motor automatically and with a closing of the inlet opening of the cooker hood extraction device, again folded upwards in the horizontal;
• FIG. 19 a schematic cross-section through a cooker-extractor which is not the subject of this invention, in which the closing element in the form of two in the closed state closely juxtaposed or overlapping, hinged door-like and each spring pressurebeaufschlagten flaps is formed, which upon actuation of a fan motor automatically releasing the inlet opening of the Fold down the cooker extractor and, after switching off the fan motor, automatically fold it upwards with the closing of the inlet opening of the cooker extractor.
• FIG. 20 a schematic cross section through a cooking vapor extraction device according to the invention with an inserted into the downstream portion of the continuing section of the exhaust duct obliquely to the flow direction of the exhausted Kochdunststromes grease mist filter element.

As already out FIG. 1 shows the device according to the invention for the withdrawal of cooking fumes in vertically below a cooking field level (1) facing direction usually includes a reversibly openable and closable cooking vapor inlet device (2).

Also off FIG. 1 It can be seen that the device according to the invention for extracting cooking fumes in general one or more, with respect to a vertical line (12) imagined by the cooking fume inlet device (2) from the side perpendicular and horizontal or obliquely from the side below may comprise indirectly downstream or directly on the underside and / or on a lateral edge of the cooking vapor inlet device (2), one-piece or multi-part exhaust air ducts (3).

As already FIG. 1 shows, can be provided downstream of the cooking fume inlet means (2) indirectly with the interposition of an initial section (9) of the exhaust duct (3) or directly a continuing section (10) of the exhaust duct (3).

Preferably, the downstream outlet opening (25) of the continuing section (10) of the exhaust air duct (3) may be in the form of a horizontally extending rectangle, a longitudinal hole or a slot.

In general, the width (22) of this outlet opening (25) of the continuing section (10) of the exhaust air duct (3) is greater than the height (26).

The width (22) of this outlet opening (25) can approximately correspond to the width (27) of the inlet opening (5) of the cooking-vapor inlet device (2).

Downstream of the outlet opening (25) of the continuing section (10) of the exhaust duct (3), one or more flat channel elements (18) each having horizontally extending, rectangular cross-sectional area from the side and horizontally and / or from the side and obliquely from below to the cooking fume inlet means (2) and / or to the initial portion (9) of the exhaust duct (3) and / or to the continuing portion (10) of the exhaust duct (3), directly or indirectly attach.

As a rule, the longitudinal axis (19) and the transverse axis (20) of the cooking vapor inlet device (2) and / or to the initial section (9) of the exhaust duct (3) and / or to the continuing section (10) of the exhaust duct (3) indirectly or immediately downstream, the first flat-channel element (18) to be aligned horizontally.

Preferably, this downstream first flat channel element (18) is formed in the form of a 90 ° horizontal arc.

As in particular from FIG. 1 As can be seen, the width (29) and the height (30) of the downstream, in cross-section horizontally extending outlet opening (28) of this downstream first flat channel element (18) in about the width (22) and the height (26) of the outlet opening (25) of the continuing section (10) of the exhaust duct (3) correspond.

In general, the width and the height of the upstream, in cross-section horizontally extending inlet opening (21) of the first flat-channel element (18) in about the width (22) and the height (26) of the outlet opening (25) of the continuing section (10) of the exhaust duct (3) correspond.

In general, the horizontally extending in cross-section outlet opening (28) of this downstream first flat channel element (18) to the rear, in the direction of the back of the device for the withdrawal of cooking fumes receiving kitchen cabinet (23) point.

As a rule, one or more further flat-channel elements (24) can be provided downstream of the horizontally extending outlet opening (28) of the first flat-channel element (18) in the form of a 90 ° horizontal arc.

These further flat channel elements (24) can lead to the rear and / or down and / or up and / or to the side.

Preferably, the inlet openings and outlet openings of the further flat channel elements (24) can in terms of their vertical height and horizontal width each have dimensions which are approximately the vertical height (26) and the horizontal width (22) of the downstream outlet opening (25). of the continuing section (10) of the exhaust duct (3) correspond.

Of particular advantage in the case of the device according to the invention for the withdrawal of cooking fumes, that the vertical distance B between the vertical height of the cooking surface (1) inlet opening (5) of the cooking fume inlet means (2) and the bottom (31) of the downstream first in the form of a 90 ° horizontal arc formed flat channel element (18), only in the range of 20.0 cm to 10.0 cm, preferably in the range of 19.0 cm to 11.0 cm, in particular in the range of 17, 0 cm to 12.0 cm, can lie.

The small formation of the distance B leads to the serious advantage that the space of a kitchen cabinet (23) below the device for the withdrawal of cooking fumes and below the downstream of this wegführenden flat channel elements (18, 24) for use in drawers or shelves or shelves with virtually no spatial restriction by the cooking fume inlet device downstream provided exhaust ducts is available.

As already FIG. 1 can be seen in a plan view, the longitudinal axes (33) of the inlet openings (5) of the cooking vapor inlet means (2), for example, at right angles to frontwärtigen leading edge (34) of the device for the withdrawal of cooking fumes carrying kitchen cabinet (23) aligned.

The inlet openings (5) can be on one or both sides laterally of a hob (1) or in its lateral edge areas on or integrated on both sides or between two hobs (1).

A particularly significant feature of the device according to the invention for the extraction of cooking fumes is that over the entire width (27) of the inlet opening (5) of the cooking fume inlet device (2) sucked cooking fumes while maintaining the flow cross-section approximately with the width (27) of Inlet opening (5) of the cooking fume inlet device (2), and only deflections experiencing substantially turbulence-free and laminar and low resistance and while maintaining the efficiency of the device for the withdrawal of cooking fumes, in the flat-channel elements (18, 24) one or more fans or fans can be fed.

One or more external fans or fans may be provided in one of the further flat channel elements (24) or between these or at or in the downstream end region of the further flat channel elements (24).

As already out FIG. 7 As can be seen, the device according to the invention is, in particular, a device for extracting cooking fumes in a direction pointing vertically below a cooking surface plane (1).

In general, the extraction device according to the invention has at least one reversibly openable and closable cooking-steam inlet device (2).

This reversible closeability of the cooking fume inlet device (2) leads to the significant advantage that odor nuisance by stale fat in the grease filter (35) when the ventilation motor and thus when not operating the cooker extractor according to the invention are reliably avoided.

The extraction device according to the invention preferably further comprises at least one vertical line (12) obliquely to the left or right obliquely with respect to the cooking vapor inlet device (2) directly or indirectly at the downstream bottom side of the cooking vapor inlet device (2) ), which results in a particularly flat space requirement of the cooking extractor device according to the invention.

The longitudinal axis (8) of the starting section (9) of the exhaust duct (3) usually encloses with the cooking surface plane (1) an angle α, which for example in the range of 20 ° to 70 °, preferably in the range of 30 ° to 60 ° , in particular in the range of 40 ° to 45 °, can lie.

In the extraction device according to the invention to reduce the flow resistance as laminar deflection of the incoming cooking vapor stream in the direction of the obliquely starting initial section (9) of the exhaust duct (3) by an opposite to Ansetzort the beginning section (9) of the exhaust duct (3) takes place at the cooking vapor Entrance device (2) to the side turned or pivoted or folded, straight in cross-section or concave closure element (7).

In a first alternative embodiment of the extraction device according to the invention, to reduce the flow resistance laminar as possible deflection of the incoming cooking vapor stream in the direction of the obliquely starting initial section (9) of the exhaust duct (3) in addition by a oblique or concavely curved formation of the initial section (9) of the exhaust duct (3) opposite wall (4) of the cooking vapor inlet device (2) take place.

The most laminar to reduce the flow resistance, turbulence lateral deflection of the cooking fume device (2) entering cooking vapor stream (see FIG. 14 ) in the direction of the obliquely beginning portion (9) of the exhaust duct (3) leads in particular to the advantages that a weaker and smaller ventilation motor is sufficient, the power consumption and operating noise are low. In addition, the flow noise within the cooking extractor device according to the invention are considerably reduced by this possible laminar deflection.

A particularly significant feature of the cooker hood extractor according to the invention is the fact that a further section (10) of the exhaust duct (3) can connect downstream to the oblique initial section (9) of the exhaust duct (3), said further section (10) of Exhaust duct (3) is optionally aligned at least partially or in sections parallel or obliquely to the cooking surface plane (1).

In general, the distance A between the surface of the hob (1) and the bottom of the continuing, horizontal portion (10) of the exhaust duct (3), for example in the range of 70 mm to 205 mm, preferably in the range of 80 mm to 200 mm , in particular in the range of 90 mm to 150 mm.

In particular, due to this very first to be realized with the cooking extractor device according to the invention, very small distance A can now be equipped with a cooker hood extraction device even without significant loss of usable for drawers or compartments interior of kitchen furniture, which carry the cooking extractor device according to the invention.

As in particular from the FIGS. 7 to 10 As can be seen, the extraction device according to the invention generally has a vertical upward-facing inlet opening (5) and an opposite, downwardly facing outlet opening (11).

In general, the vertically upwardly oriented inlet opening (5) of the cooking-vapor inlet device (2) is reversibly closable and openable by a closing element (7) which can be rotated and / or pivoted and / or hinged about a horizontal axis of rotation (6).

The closure element (7) according to the invention is reversible in cross-section - with respect to its horizontal axis of rotation (6) - at least between a 12 o'clock position closing the inlet opening (5) and a 2 o'clock releasing the inlet opening (5) Position, 3 o'clock position, 4 o'clock position or 5 o'clock position on the one hand or 10 o'clock position, 9 o'clock position, 8 o'clock position or 7 o'clock position on the other hand, back and forth can be turned or swiveled.

In particularly preferred embodiments of the cooking extractor device according to the invention, a counterweight (15) acting on the other side from the axis of rotation (6) can be provided for complete or partial compensation of the dead weight of the closure element (7) rotatable or pivotable about its axis of rotation (6).

The provision of the counterweight (15) to compensate for the dead weight of the closing element (7) leads in particular to the advantage that even very small forces for rotation or pivoting of the closing element (7) about its axis of rotation (6) are sufficient. In particular, the rotary forces to be applied to the manually drivable rotary wheel (13) are very low.

In particularly preferred embodiments of the device according to the invention, one or more devices for indirect or immediate engagement or snapping or clamping of the rotatable or pivotable closing element (7) in its the inlet opening (5) of the cooking fume inlet device (2) closing position and / or in his the inlet opening (5) of the cooking vapor inlet device (2) releasing positions may be provided.

In particular from the FIGS. 7 to 10 shows that in cross-section through the pivot point (6) of the closing element (7), for example, a straight or curved arm may extend, which at one free end the closing element (7) and at its opposite free end to compensate for the dead weight of the closing element (7 ) carries a counterweight (15).

Also in particularly preferred embodiments of the cooking extractor device according to the invention can on the rotatable or pivotable or hinged closing element (7) and / or on the counterweight (15) for this purpose and / or between the counterweight (15) and the axis of rotation (6) at least one first positioning magnet (16) reversibly or irreversibly attached.

Preferably, at least one second, oppositely polarized positioning magnet (17) are then reversibly or irreversibly provided on the housing side.

The attachment of these positioning magnets (16, 17) leads to the advantage that the closing element (7) in its position closing the inlet opening (5) and / or in its position releasing the inlet opening (5) and / or In its laminar deflecting position, the cooking odors are magnetically safe and the respective position can be locked in a self-locating manner. Preferably, the corresponding position of the closing element (7) can be sensed manually via different rotational resistances.

Instead of providing a housing-side positioning magnet (17) and another closing element-side or counterweight-side positioning magnet (16) can of course only one side a positioning magnet (16, 17) may be provided, while the other side counterpart made of a ferromagnetic material, for example is.

In particular from the FIGS. 15 to 17 it follows that the at least one housing-side positioning magnet (17) when viewing a cross-section with respect to the axis of rotation (6) in the 2 o'clock position, 3 o'clock position or 4 o'clock position and / or in the 5 Clock position, 6 o'clock position or 7 o'clock position and / or in the 8 o'clock position, 9 o'clock position or 10 o'clock position can be provided.

As FIG. 14 shows in an impressive manner, the closing element (7) in the inlet opening (5) of the cooking vapor inlet device (2) releasing, pivoted to the side position a seitwärtige, laminar alignment of the Kochdunst inlet device (2) flowing cooking vapor in the direction of the longitudinal axis (8) of the obliquely to the cooking vapor inlet device (2) starting from below initial section (9) of the exhaust duct (3) effect.

The pivotable or rotatable or hinged closing element (7) for closing the inlet opening (5) of the cooking-vapor inlet device (2) can be plate-shaped straight or concave in cross-section in its closing region in cross-section.

For example, the radius of curvature for a concave curvature of the curved, plate-shaped closing element (7) can be in the range from 20 mm to 150 mm, preferably in the range from 25 mm to 80 mm, in particular in the range from 30 mm to 60 mm.

In general, therefore, the closing element (7) from its the inlet opening (5) of the cooking vapor inlet device (2) closing, with respect to the pivot point (6) in the 12 o'clock position closed position in a thereto by an angle β in the one or the other direction rotated or pivoted opening position be reversibly rotatable or pivotable or hinged.

The angle β can on both sides of a by the pivot point (6) or the axis of rotation imaginary, the 12 o'clock position marking vertical line (12) in the range of 30 ° to 70 °, preferably in the range of 35 ° to 65 °, in particular in the range of 40 ° to 60 °.

In general, the starting portion (9) of the exhaust duct (3) in cross-section from the left or from the right in an oblique orientation and from below to the cooking fume inlet means (2). Here, the pivoted or rotated to the side opening position of the rotatable or pivotable closing element (7) for releasing the inlet opening (5) of the cooking vapor inlet device (2) in cross-section, preferably, on the side opposite to the side of the connection of the initial section (7) of the exhaust duct (3) to the cooking vapor inlet means (2).

According to the invention the passage of the flowing kitchen fumes through the cooking fume inlet means (2) and their deflection by the side turned or swiveled closing element (7) or by the oblique or concave curved wall (4) of the cooking fume inlet means (2) the obliquely beginning portion (9) of the exhaust duct (3) turbulence-free and / or laminar.

As in particular from the FIG. 11 it can be seen, in the case of the extraction device according to the invention, the vertically upwardly facing inlet opening (5) of the cooking vapor inlet device (2) in the plan view in the form of a rectangle, a longitudinal hole or a slot may be formed.

Also off FIG. 11 It is clearly evident that the closing element (7) of the cooking-vapor inlet device (2) is generally rotatable or pivotable or foldable about an axis of rotation (6) which in plan view is approximately parallel to the longitudinal axis of the inlet opening (5) and in plan view, approximately in the middle of the inlet opening (5) and in cross-section in height or just below the cooking surface level (1).

The closing element (7) can be reversibly swiveled or pivoted or hinged about the axis of rotation (6), for example by means of a motor.

Alternatively, the closing element (7) about the rotation axis (6) mechanically, for example by means of a rotary wheel (13) reversibly back and forth to be rotatable or hinged or hinged.

In particularly preferred embodiments of the cooking extractor device according to the invention, the axis of rotation (6) may be in the form of, for example, a continuous, substantially horizontally oriented rod.

Also in particularly preferred embodiments of the cooking extractor device according to the invention, the axis of rotation (6) in the form of, for example, two approximately horizontally opposite suspension points for the rotatable or hinged or hinged closing element (7) may be formed so that the extracted kitchen fume stream undivided turbulence in the entire width into the inlet opening (5) and can flow through it.

The closing element (7) may have, for example, the shape of a letter U in longitudinal section, the two free ends communicating with the axis of rotation (6) and the central, horizontal section being along the length of the inlet opening (5) of the cooking-vapor inlet device (2) extends horizontally.

In particularly preferred embodiments of the cooking extractor device according to the invention may be provided fixed or removable laterally outside the vertical upward-facing inlet opening (5) of the cooking fume inlet means (2) circumferentially or in sections a one or more parts overflow protection or mounting frame (14). As a rule, the edge region of the overflow protection and mounting frame (14) facing the inlet opening (5) is at least slightly elevated in relation to the cooking surface plane (1) in order to realize overcooking protection.

In general, the cooking extractor device according to the invention, both in the open operating state and in the closed state, is substantially flush with the surface of the cooking surface plane (1) and / or with the surface of the work surface receiving this.

The substantially flush flush with the surface of the hob leads to the serious advantage that in the case of the cooking extractor device according to the invention the withdrawal devices of the prior art as particularly disturbing perceived restriction of handling space in the field of the hob through the hob vertically and / or horizontally outstanding extractor components even in functional condition safely omitted.

Alternatively, only the mounting frame and overflow protector (14) may have the surface of the cooking surface plane (1) or the surface of the worktop receiving it in the range of 0.5 mm to 5.0 mm, preferably in the range of 1.0 mm to 4.0 mm, in particular in the range of 1.5 mm to 3.0 mm, project beyond.

In particularly preferred embodiments of the cooking extractor device according to the invention, the closing element (7) with or without its counterweight (15) and with or without rotary knob (13) for the manual rotation or pivoting of the closing element (7) around its axis of rotation (6) without tools Cleaning purposes from the cooker inlet device (2) simple, easy, effortless and quickly removable.

Because of this feature of a particularly simple and quick removability, if appropriate, the closing element (7) with counterweight (15) and rotary knob (13) can be easily fed to frequent cleaning operations in a dishwasher.

In general, the dimensions of the closing element (7), its counterweight (15) and its manually driven rotary wheel (13) and their spatial relationship to each other selected such that a quick, easy and easy removability of the closing element (7), the counterweight (15) and the rotary wheel (13) from the cooking fume inlet means (2) without prior removal of the mounting frame and overflow protection (14) is possible.

As a rule, in the case of the cooker extractor device according to the invention, the distance between the cooker inlet device (2) on the one hand and the ventilation motor or motors on the other hand is in the range of 0.5 m to 100 m, preferably in the range of 1 m to 80 m, in particular in the range of 1.5 m to 15 m.

In particular, due to the low flow resistance caused by the laminar, turbulence-free deflection, in the case of the cooker extractor device according to the invention, it is possible for the first time to provide the ventilation motor at such a great distance from a cooker inlet device (2). The ventilation motor can therefore be easily positioned outside of the kitchen extractor device according to the invention receiving kitchen furniture, for example, in the basement or on the memory of a house.

In an alternative embodiment, which is not the subject of this invention, in a cross-sectional view, the pivot axis (6) of the closing element (7) in a vertical respect approximately at the level of the top of the cooking field level (1) and in horizontal respect in the lateral edge region of the inlet opening (5 ) of the cooking-vapor inlet device (2) lie.

In this case, the closing element (7) on actuation of the fan motor automatically turn down while releasing the inlet opening (5). After the fan motor has been switched off, the closing element (7) folded downwards can then swing back upwards into its position closing the inlet opening (5) due to a spring action.

As a rule, the axis of rotation (6) in this case lies in a horizontal direction in that lateral edge region of the inlet opening (5), which in cross section of the side of the connection of the starting section (7) of the exhaust air duct (3) to the cooking-vapor inlet device (2). opposite.

So according to FIG. 18 in a cross-sectional view, the pivot axis (6) of the closing element (7) in a vertical respect approximately at the level of the top of the cooking field level (1) and horizontally in the lateral edge region of the inlet opening (5) of the cooking vapor inlet device (2), so that the Closing element (7) on actuation of a fan motor automatically with release of the inlet opening (5) rotates downwards and after switching off the fan motor due to a spring action back into the inlet opening (5) closing position swings back up to the horizontal starting position.

According to FIG. 19 , which also represents a non-inventive object, in a cross-sectional view, two opposite pivot axes (6) of two horizontally aligned in the closed state and closely abutting or at least slightly overlapping, pivotally opposed closing elements (7) in vertical respect approximately at the level of the top of the cooking surface (1) and horizontally in the two lateral longitudinal edge regions of the inlet opening (5) of the cooking-vapor inlet device (2) lie.

In this case, the two pivoting door-like closing elements (7) on actuation of a fan motor with release of the inlet opening (5) swing away down and after switching off the fan motor due to a spring action back into their entry opening (5) closing the starting position in the top Swing back horizontal starting position.

As FIG. 18 shows, the axis of rotation (6) in horizontal respect in that lateral edge region of the inlet opening (5) lie, which in cross-section the side of the connection of the initial portion (9) of the exhaust duct (3) on the cooking fume inlet means (2) is opposite.

Also in a particularly preferred embodiment of the device according to the invention, the cooking fume inlet means (2) and the starting section (9) of the exhaust duct (3) and the continuing section (10) of the exhaust duct (3) in cross-section continuously, seamless, edgeless, kinked and continuously merge into one another to ensure a laminar, turbulence-free forwarding of the sucked cooking fumes or integrally formed.

How out FIG. 20 It can be seen, in the region of the downstream outlet opening (25) of the continuing section (10) of the exhaust duct (3) one or more filter elements (35) preferably be provided obliquely inclined to the flow direction of the extracted cooking vapor and / or to the vertical reversible.

The filter element or elements (35) can be, for example, a wire mesh filter or a plastic fiber fleece filter.

The flow area of the filter element (35) is preferably larger than the area of the inlet opening (5) of the cooking-vapor inlet device (2).

By the ratio of these two surfaces to each other, the cooking vapor flow rate in the region of the filter element can be set to an optimal value with respect to the filter effect, especially since the largest Fettnebelabscheidungs efficiency of each filter element (35) at a very specific, filter material-dependent flow rate.

In particularly preferred embodiments of the device according to the invention for the suction of cooking fumes, the edge area (37) of the filter element (35) lying vertically below can, for example, be in a trough-shaped Bight (36) of the starting portion (9) of the exhaust duct (3) or the continuing portion (10) of the exhaust duct (3) einliegen (see FIG. 20 ).

This bulge (36) leads, inter alia, to the advantage that liquids which have run off the filter element (35) or have penetrated through the inlet opening (5) of the cooking-vapor inlet device (2) accumulate in the latter and thereby contaminate it further in the downstream direction be safely prevented and moreover can be easily taken and removed from there.

In general, the frame edge regions (37) of the filter elements (35) lie outside the flow cross section of the outlet opening (25) of the continuing section (10) of the exhaust air duct (3).

Preferably, the cooking fume passage surface of the filter element (35) to the surface of the inlet opening (5) of the cooking fume inlet means (2) in the ratio of 2.0 to 1.2, preferably in the range of 1.8 to 1.3, in particular Range from 1.7 to 1.4, to 1.

In this case, the flow rate of cooking fumes in the region of the filter element (35) in the range of 3.0 m / sec. to 1.5 m / sec., Preferably in the range of 2.5 m / sec. to 1.6 m / sec., In particular in the range of 2.0 m / sec. to 1.7 m / sec., lie.

In summary, it should be noted that in the context of the present invention, a kitchen extraction device is provided which despite a deduction of the kitchen fumes vertically below the cooking field level (1) the interior of the extractor device receiving kitchen furniture in the vertical direction largely unobstructed and therefore usable for drawers, fixtures or Abstellzwecke leaves.

Another major advantage of the cooker hood extraction device according to the invention lies in particular due to their inventively designed exhaust flat duct is that the intrinsic flow resistance of the cooking fume extraction device according to the invention and the invention aligned exhaust flat duct elements are particularly low and therefore the advantageous use of - in comparison is the first time possible for the powerful fans used in cooking extractor devices of the prior art - especially small fans with particularly low power consumption and noise.

Claims (10)

1. A device for extracting cooking fumes in a direction which points vertically below a hob level (1), which comprises a cooking fume inflow device (2), Which can be reversibly opened and closed, and one or a plurality of single- or multi-part exhaust air ducts (3), which are attached downstream directly or indirectly to the underside and/or to a lateral flank of the cooking fume inflow device (2) at a right angle and horizontally from the side or diagonally from below from the side in relation to an imaginary vertical line (12) through the cooking fume inflow device (2), wherein a further section (10) of the exhaust air duct (3) is provided downstream directly on the cooking fume inflow device (2) or indirectly with interposition of an initial section (9) of the exhaust air duct (3), wherein the passage of the kitchen fumes flowing through is free of eddies and laminar owing to the cooking fume inflow device (2) and its deflection by means of a closure element (7) which is turned or pivoted to the side, and optionally by an obliquely or concavely curved wall (4) of the cooking fume inflow device (2) into the obliquely attached initial section (9) or into the further section (10) of the exhaust air duct (3), wherein the laminar deflection of the inflowing cooking fume flow in the direction of the initial section (9) or of the further section (10) of the exhaust air duct (3) takes place by means of the closure element (7) which is turned, pivoted or swung to the side opposite the attachment point of the initial section (9) or of the further section (10) of the exhaust air duct (3) to the cooking fume inflow device (2) and has a straight or concavely curved cross section, and optionally by means of the oblique or concavely curved configuration of the wall (4) of the cooking fume inflow device (2) which lies opposite the initial section (9) or the further section (10) of the exhaust air duct (3), characterised in that a downstream exit opening (25) of the further section (10) of the exhaust air duct (3) has the shape of a horizontal rectangle, an oblong hole or a slot, and the width (22) of this exit opening (25) of the further section (10) of the exhaust air duct (3) is greater than its height (26), wherein the width (22) of this exit opening (25) corresponds approximately to the width (27) of an inflow opening (5) of the cooking fume inflow device (2), and wherein one or a plurality of flat duct elements (18) with in each case horizontal, rectangular cross-sectional areas are attached directly or indirectly from the side and horizontally or from the side and diagonally from below to the cooking fume inflow device (2) and/or to the initial section (9) of the exhaust air duct (3) and/or to the further section (10) of the exhaust air duct (3) downstream from the exit opening (25) of the further section (10) of the exhaust air duct (3), and that the closure element (7) can be turned or pivoted to and fro in cross section - in relation to a horizontal axis of rotation (6) - reversibly at least between a 12 o'clock position which closes the inflow opening (5) and a 2 o'clock position, 3 o'clock position, 4 o'clock position or 5 o'clock position on one side, or a 10 o'clock position, 9 o'clock position, 8 o'clock position or 7 o'clock position on the other side which opens the inflow opening (5).
2. The kitchen extraction device with a kitchen base cabinet, a work surface, a hob and a device according to Claim 1, characterised in that the vertical distance B between the inflow opening (5) of the cooking fume inflow device (2) which is at the vertical height of the hob level (1) and the underside (31) of the first downstream flat duct element (18) which is configured in the form of a 90° horizontal bend is only in the range from 20.0 cm to 10.0 cm, preferably in the range from 19.0 cm to 11.0 cm, particularly in the range from 17.0 cm to 12.0 cm, so that the space of a kitchen base cabinet (23) under the device for extracting cooking fumes and under the flat duct elements (18, 24) which leads away from the said device can be used for drawers or slide-in modules or shelves with virtually no spatial restrictions due to exhaust ducts provided downstream of the cooking fume inflow device.
3. The device according to Claim 1, characterised in that the cooking fumes sucked in over the entire width (27) of the inflow opening (5) of the cooking fume inflow device (2) can be fed in the flat duct elements (18, 24) to a fan or ventilator while maintaining the flow cross section approximately with the width (27) of the inflow opening (5) of the cooking fume inflow device (2), while only undergoing deflections, in a turbulence-free, laminar and low-resistance manner and while maintaining the efficiency of the device for extracting cooking fumes.
4. The device according to one of the preceding Claims 1 or 3, characterised in that the vertically upwardly facing inflow opening (5) of the cooking fume inflow device (2) is configured in plan view in the shape of a rectangle, an oblong hole or a slot.
5. The device according to one of the preceding Claims 1, 3 or 4, characterised in that the axis of rotation (6) can be turned or pivoted or swung, runs in plan view parallel to the longitudinal axis of the inflow opening (5) and approximately in the centre of the latter and lies in cross section at the height of or below the hob level (1).
6. The device according to Claim 5, characterised in that the axis of rotation (6) is configured in the form of a continuous approximately horizontally aligned rod or in the form of two approximately horizontally opposite hanging points for the rotatable or pivotable or swingable closure element (7).
7. The device according to one of the preceding Claims 5 or 6, characterised in that the closure element (7) in longitudinal section has the shape of a letter U, wherein the free ends are in each case connected to the axis of rotation (6), and the central horizontal section extends horizontally over the length of the inflow opening (5) of the cooking fume inflow device (2).
8. The device according to one of the preceding Claims 1 or 3-7, characterised in that a single- or multi-part overflow protection and installation frame (14) is provided in a fixed or removable manner laterally outside the vertically upwardly facing inflow opening (5) of the cooking fume inflow device (2) all the way round or in sections, wherein the edge region of the installation frame (14) which faces the inflow opening (5) is slightly elevated vertically relative to the hob level (1) in order to realise an overboil protection.
9. The device according to one of the preceding Claims 5 to 7, characterised in that the closure element (7) can be removed from the cooking fume inflow device (2) without tools, quickly and simply for cleaning purposes.
10. The device according to one of the preceding Claims 1 or 3-9, characterised in that one or a plurality of filter elements are provided reversibly in the region of the downstream exit opening (25) of the further section (10) of the exhaust air duct (3) obliquely to the flow direction of the sucked in cooking fumes, the edge region (37) of which filter elements, which lies vertically below, lies in a channel-shaped indentation (36) in the further section (10), and the frame edge regions (37) of which lie outside the flow cross section of the exit opening (25) of the further section (10) of the exhaust air duct (3).

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