EP4180725A1 - Extractor hood - Google Patents
Extractor hood Download PDFInfo
- Publication number
- EP4180725A1 EP4180725A1 EP22202828.4A EP22202828A EP4180725A1 EP 4180725 A1 EP4180725 A1 EP 4180725A1 EP 22202828 A EP22202828 A EP 22202828A EP 4180725 A1 EP4180725 A1 EP 4180725A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- extractor
- air flow
- housing
- extractor hood
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000010411 cooking Methods 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000003313 weakening effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 10
- 230000004308 accommodation Effects 0.000 description 6
- 239000003517 fume Substances 0.000 description 4
- 241000237858 Gastropoda Species 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2035—Arrangement or mounting of filters
Definitions
- the invention relates to an extractor hood for removing cooking vapors from a hob by means of an air flow, with an extractor housing which has at least one air intake opening and at least one air outlet for the air flow, at least one fan arranged in the extractor housing for generating the air flow, and at least one fan in the Extractor housing in the air flow between the air intake opening and fan arranged separating element for separating one or more components of the cooking vapors, in particular fat and / or oil, from the air flow, wherein the air flow in the extractor housing is guided from the air intake opening via the separating element to the fan and from the fan is blown out of the flue housing via the air outlet.
- Forward curved centrifugal fans ie centrifugal fans with forward curved blades
- Forward-curved centrifugal fans produce a so-called blade rotation sound, which depends on the speed and number of blades of the fan. If the housing walls are at different distances, strong air vortices are also formed, which combine to form so-called vortex braids at the narrowest points. This turbulence hits the rotating impeller blades directly, resulting in a noise that includes a broadband hiss and additional narrowband, tonal sound components, which are also referred to as propeller noise or rotary noise.
- Passive noise protection measures are often associated with large space requirements and high costs.
- forward-curved centrifugal fans are logarithmic need widening snail housing, which takes up a relatively large amount of space in the hood housing of the extractor hoods.
- radial fans cannot fulfill their function in the extractor hood, since the worm housing is necessary to build up a working pressure in forward-curved radial fans.
- the object of the invention to specify an improved extractor hood which enables cooking vapors to be removed effectively and offers low noise emissions during operation. If possible, the extractor hood should also have a small footprint.
- the inlet guide grille is advantageously designed to split up turbulence forming in the air flow in the extractor housing when it hits the inlet guide grille and weaken it as the air stream flows through the inlet guide grille.
- the sound pressure decreases in the entire frequency range.
- the disturbing rotary sound in the lower frequency range can be significantly reduced in this way. This results in a significantly reduced sound pressure level and the operating noise of the extractor hood that is perceived as more pleasant.
- compromises can also be made to save installation space, which would lead to the formation of so-called vortex braids at narrower points, since these vortex braids are effectively split up and weakened by the inlet guide vane.
- the supply guide grid is arranged on an inlet nozzle of the fan. Via the inlet nozzle, the sucked-in air of the air flow can be guided in a targeted manner from the inlet grille to the fan wheel, with turbulence on the inlet grille being effectively split up and weakened.
- An embodiment is particularly preferred which provides that the fan is a radial fan with a backward-curved fan wheel.
- the space requirement of the extractor hood can be easily reduced, since the backward-curved fan wheel requires less installation space than a forward-curved radial fan with a worm housing. Due to the significantly better efficiency of the backward-curved radial fans, the extraction of cooking vapors can be particularly effective. Without the logarithmically expanding worm housing, the size of the backward-curved fan wheels can also be increased, so that noise emissions during operation can also be reduced by lower fan wheel speeds. For the same working point, i.e. a conveyed volume of the air flow at a given system pressure, e.g.
- the proposed extractor hood requires less installation space, is quieter and requires around half the power consumption compared to conventional extractor hoods with forward-curved radial fans snail shells. Since the worm housing can be dispensed with, a larger fan wheel can also be installed with the same installation space, which means that the speed can be reduced at the same operating point and the acoustic properties can thus be improved.
- a particularly advantageous embodiment of the invention relates to the fan wheel having a diameter of at least 170 mm, preferably at least 220 mm, more preferably at least 250 mm.
- a backward-curved fan wheel of this size cooking vapors can be extracted particularly effectively and quietly at the same time.
- Forming vortex braids are effectively split out by the inlet guide grille and weakened, so that the use of such large fan wheels is possible without any problems even in a limited space.
- the fan wheel can be operated at lower speeds in a smaller installation space than was previously the case.
- a particularly advantageous embodiment of the invention provides that a pressure side of the fan forms a receiving space arranged circumferentially around the fan wheel.
- the fan is housed in the extractor housing in a space-saving manner, with the accommodation space adjoining the fan wheel already forming the pressure side of the fan.
- An advantageous embodiment of the invention provides that an overall height of the receiving space axially to an axis of rotation of the fan wheel corresponds to at most 1.6 times the height of the fan wheel. With such a limited accommodation space, space can be saved in the trigger housing. This allows the advantages of the backward-curved fan wheel in the extractor hood to be exploited, since no large-volume worm housing is required to build up the pressure.
- An embodiment is particularly advantageous which provides that an overall depth of the receiving space in a first direction of expansion radially to an axis of rotation of the fan wheel corresponds to at most 1.4 times the fan wheel diameter. Installation space can be saved in the extractor hood via such a limited accommodation space. The advantages of the backward-curved fan wheel can therefore be used in the extractor hood, since no large-volume fan housing is required for the pressure build-up.
- An advantageous embodiment provides that an overall width of the receiving space in a direction perpendicular to the first direction of expansion, second direction of expansion radially to the axis of rotation of the fan wheel corresponds to at most 1.4 times the diameter of the fan wheel.
- Such a limited accommodation space saves a great deal of installation space in the extractor hood.
- the advantages of the backward-curved fan wheel can therefore be used particularly well here. With the pressure build-up within the backward-curved fan impeller, there is no need for a large-volume worm housing around the fan impeller in the extractor hood.
- the hood housing is constructed in two parts, so that a first part of the hood housing includes the separating element and a second part of the hood housing includes the fan.
- the splitting of the extractor housing simplifies the assembly and the creation of variants for the extractor hood.
- the arrangement of the separating element in the first part of the hood housing and the arrangement of the fan in the second part of the hood housing makes it possible to combine different first and second parts of the hood housing to form an extractor hood. In this way, different separating elements can easily be combined with different fans within the scope of creating variants to form a fume hood by connecting the parts of the fume hood housing to one another.
- the inlet guide vane has a lattice web structure, which forms radial webs spaced apart in a circumferential direction and coaxial circumferential webs spaced apart in a radial direction, with the webs each forming guide surfaces extending in the flow direction of the air flow, with the inlet guide vane grid having a radial has an outer edge and a central middle area around a central axis of the preliminary guide cascade, and an enveloping surface spanned by the radial outer edge and the middle area is convexly curved in the radial outer edge and flat in the middle area, in particular parallel to a radial plane of the preliminary guide cascade, with the circumferential webs in the radial direction in are each arranged at a radial distance from the central axis of the preliminary guide vane and whose guide surfaces each have a varying angular position in relation to an axial plane of the preliminary guide vane.
- the grid web structure is particularly suitable for splitting up turbulence in a space-saving and effective manner when it hits the inlet guide grille and weakening it when the air flow passes through the inlet guide grille.
- the extractor hood achieves an improved overall static efficiency and a further reduced sound output.
- the radial webs and peripheral webs can therefore be designed to be particularly thin-walled in cross section. This reduces the inflow area of the webs and the flow resistance generated by the webs. In addition, the formation of vortices caused by the webs themselves is prevented, which in turn would otherwise lead to noise.
- the extractor hood 1 is used to remove cooking vapors 2 over a hob 3 by means of an air flow 4 and has a hood housing 5 which has an air intake opening 6 on the underside and an air outlet 7 for the air flow 4 on the top.
- the extractor hood 1 is off figure 1 shown individually.
- This representation already shows how compact the extractor housing 5 of the extractor hood 1 is.
- the extractor hood 1 shown is particularly suitable as a built-in hood for installation in a kitchen wall unit.
- the compact dimensions of the extractor housing 5 make it possible to use the remaining interior volume of the wall unit as additional storage space.
- the extractor housing 5 has extremely compact dimensions, which allow a large proportion of the interior volume of the upper cabinet to be used as storage space.
- the reasons for the compact external dimensions of the extractor housing 5 can be seen in the following views, which show the internal structure of the extractor hood 1.
- the figure 4 shows an exploded view of the extractor hood 1 according to FIG Figures 1 to 3 .
- a fan 8 for generating the air flow 4 ( 1 ) is arranged in operation through the extractor hood 1.
- This fan 8 is advantageously a radial fan and has a fan wheel 12 curved backwards.
- the extractor hood 1 requires less installation space, is quieter and consumes only about half the power of conventional extractor hoods with forward-curved radial fans in snail housings.
- the extractor housing 5 is constructed in two parts, so that a first part 16 of the extractor housing 5 comprises a separating element 9 and a second part 17 of the extractor housing 5 comprises the fan 8. concept possible.
- a guide grille 10 is arranged between the fan 8 and the separating element 9 in the air flow 4 .
- This inlet guide grille 10 is designed to split up vortex braids forming in the airflow 4 in the extractor housing 5 when they hit the inlet guide grille 10 and weaken them as the airflow 4 flows through the inlet guide grille 10 .
- the inlet guide grid 10 is preferably arranged on an inlet nozzle 11 of the fan 8 . This inlet nozzle 11 directs the sucked-in air of the air flow in a targeted manner from the air guide grille 10 into the intake area of the fan 8.
- a funnel-shaped receptacle 24 is provided, via which the air flow 4 is channeled to the air guide grille 10.
- FIG 5 is another exploded view of the extractor hood 1 according to Figures 1 to 4 shown. It can be seen that the second part 17 of the trigger housing 5 can be assembled from very few parts.
- the separating element 9 in the first part 16 of the extractor housing 5 can be seen here.
- the separating element 9 is arranged in the extractor housing 5 in the air flow 4 between the air intake opening 6 and the fan 8 and is used to separate one or more components of the cooking vapors 2 ( 1 ), in particular fat and/or oil, from the air stream 4 ( 1 ), where the air flow 4 ( 1 ) is guided in the hood housing 5 from the air intake opening 6 via the separating element 9 to the fan 8 and is blown out of the hood housing 5 by the fan 8 via the air outlet 7 .
- the advance guide grid 10 has a grid structure. This lattice bar structure is formed by radial bars 18 spaced apart in a circumferential direction and coaxial peripheral bars 19 spaced apart in a radial direction.
- the advance guide grid 10 has a radial outer edge 21 and a central central area 22 around a center axis 21 of the advance guide grid 10 .
- the enveloping surface spanned by the radial outer edge 21 and the central area 22 is convexly curved in the radial outer edge 21 and flat in the central area 22 , in particular parallel to a radial plane of the preliminary guide grid 10 .
- the peripheral webs 19 are each arranged at a radial distance from the central axis 23 of the preliminary guide vane 10 .
- the guide surfaces 20 of the peripheral webs 19 each have a varying angular position in relation to an axial plane of the preliminary guide grid 10 .
- This lattice structure especially the vortex braids are split up in a space-saving and effective manner when they hit the preliminary guide grille 10 and are weakened when the air flow 4 flows through the preliminary guide grille 10, which leads to an improved overall static efficiency and a reduced sound output of the extractor hood 1.
- the convex enveloping surface in the radial outer area 21 improves the strength and stability of the curved shape of the guide vane cascade 10.
- the radial webs 18 and peripheral webs 19 can therefore be designed with particularly thin walls in cross section, which reduces the inflow area of the webs 18, 19 and the flow resistance through the webs 18 , 19 decreased.
- the pressure side of the fan 8 is formed by a receiving space 14 arranged circumferentially around the fan wheel 12 .
- the fan 8 is thus built around the receiving space 14 in the extractor housing 5 to save space, so that the receiving space 14 adjoining the fan wheel 12 already forms the pressure side of the fan 8 .
- the receiving space 14 preferably has an essentially rectangular basic shape. If the distance chosen between the backward-curved fan wheel 12 and a wall delimiting the receiving space 14 is too small, disturbing noises arise.
- the walls circumferentially spaced apart from the fan wheel 12 are advantageously arranged sufficiently spaced apart from the fan wheel.
- the fan wheel 12 advantageously has a diameter ld of at least 170 mm, preferably at least 220 mm, more preferably at least 250 mm.
- the receiving space 14 advantageously has an overall height bh axially to the axis of rotation 15 of the fan wheel 12, which corresponds at most to 1.6 times the fan wheel height lh.
- the overall depth bt of the receiving space 14 in a first direction of expansion radially to an axis of rotation 15 of the fan wheel 12 can correspond to at most 1.4 times the fan wheel diameter ld.
- the overall width bb of the receiving space 14 in a second direction of expansion perpendicular to the first direction of expansion, radially to the axis of rotation 15 of the fan wheel 12, can also correspond to at most 1.4 times the fan wheel diameter ld.
- Such a limited accommodation space 14 in the trigger housing 5 very easily saves installation space.
- the advantages of the backward-curved fan wheel 12 in the extractor hood 1 can be optimally utilized, since no large-volume worm housing is required to build up the pressure.
- the figure 6 also allows a look at the Residual oil separator 25 of the separating element 9 and the fat collecting tray 26 of the separating element 9 arranged underneath.
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Abstract
Die Erfindung betrifft eine Dunstabzugshaube (1) zum Abzug von Kochdünsten (2) über einem Kochfeld (3) mittels eines Luftstromes (4), mit einem Abzugsgehäuse (5), das wenigstens eine Luftansaugöffnung (6) und wenigstens einen Luftauslass (7) für den Luftstrom (4) aufweist, wenigstens einem in dem Abzugsgehäuse (5) angeordneten Lüfter (8) zur Erzeugung des Luftstromes (4), und wenigstens einem in dem Abzugsgehäuse (5) in dem Luftstrom (4) zwischen Luftansaugöffnung (6) und Lüfter (8) angeordneten Abscheideelement (9) zur Abtrennung eines oder mehrerer Bestandteile der Kochdünste (2), insbesondere Fett und/oder Öl, aus dem Luftstrom (4), wobei der Luftstrom (4) in dem Abzugsgehäuse (5) von der Luftansaugöffnung (6) über das Abscheideelement (9) zu dem Lüfter (8) geführt ist und von dem Lüfter (8) über den Luftauslass (7) aus dem Abzugsgehäuse (5) geblasen wird. Aufgabe der Erfindung ist es, eine verbesserte Dunstabzugshaube anzugeben, die einen effektiven Abzug von Kochdünsten ermöglicht und geringe Lärmemissionen im Betrieb bietet. Möglichst soll die Dunstabzugshaube dabei auch einen geringen Platzbedarf aufweisen. Hierzu schlägt die Erfindung vor, dass zwischen dem Lüfter (8) und dem Abscheideelement (9) in dem Luftstrom (4) ein Vorleitgitter (10) angeordnet ist, das dazu ausgebildet ist, sich im Abzugsgehäuse (5) im Luftstrom (4) bildende Wirbelzöpfe beim Auftreffen auf das Vorleitgitter (10) aufzuspalten und beim Durchfluss des Luftstromes (4) durch das Vorleitgitter (10) abzuschwächen.The invention relates to an extractor hood (1) for extracting cooking vapors (2) above a hob (3) by means of an air flow (4), with an extractor housing (5) which has at least one air intake opening (6) and at least one air outlet (7) for the air flow (4), at least one fan (8) arranged in the extractor housing (5) for generating the air flow (4), and at least one in the extractor housing (5) in the air flow (4) between the air intake opening (6) and the fan (8) arranged separating element (9) for separating one or more components of the cooking vapors (2), in particular fat and / or oil, from the air flow (4), wherein the air flow (4) in the extractor housing (5) from the air intake opening ( 6) is guided via the separating element (9) to the fan (8) and is blown out of the extractor housing (5) via the air outlet (7) by the fan (8). The object of the invention is to provide an improved extractor hood that allows cooking vapors to be removed effectively and offers low noise emissions during operation. If possible, the extractor hood should also have a small footprint. To this end, the invention proposes that between the fan (8) and the separating element (9) in the air flow (4) there be arranged a guide grille (10) which is designed to form in the extractor housing (5) in the air flow (4). Splitting up turbulence when it hits the inlet grille (10) and weakening it when the air flow (4) flows through the inlet grille (10).
Description
Die Erfindung betrifft eine Dunstabzugshaube zum Abzug von Kochdünsten über einem Kochfeld mittels eines Luftstromes, mit einem Abzugsgehäuse, das wenigstens eine Luftansaugöffnung und wenigstens einen Luftauslass für den Luftstrom aufweist, wenigstens einem in dem Abzugsgehäuse angeordneten Lüfter zur Erzeugung des Luftstromes, und wenigstens einem in dem Abzugsgehäuse in dem Luftstrom zwischen Luftansaugöffnung und Lüfter angeordneten Abscheideelement zur Abtrennung eines oder mehrerer Bestandteile der Kochdünste, insbesondere Fett und/oder Öl, aus dem Luftstrom, wobei der Luftstrom in dem Abzugsgehäuse von der Luftansaugöffnung über das Abscheideelement zu dem Lüfter geführt ist und von dem Lüfter über den Luftauslass aus dem Abzugsgehäuse geblasen wird.The invention relates to an extractor hood for removing cooking vapors from a hob by means of an air flow, with an extractor housing which has at least one air intake opening and at least one air outlet for the air flow, at least one fan arranged in the extractor housing for generating the air flow, and at least one fan in the Extractor housing in the air flow between the air intake opening and fan arranged separating element for separating one or more components of the cooking vapors, in particular fat and / or oil, from the air flow, wherein the air flow in the extractor housing is guided from the air intake opening via the separating element to the fan and from the fan is blown out of the flue housing via the air outlet.
In Dunstabzugshauben werden aufgrund physikalischer und psychoakustischer Eigenschaften üblicherweise vorwärtsgekrümmte Radiallüfter (d.h. Radiallüfter mit vorwärtsgekrümmten Schaufeln) verwendet. Vorwärtsgekrümmte Radiallüfter erzeugen einen sogenannten Schaufeldrehklang, welcher von der Drehzahl und Schaufelzahl des Lüfters abhängt. Bei unterschiedlich nahen Gehäusewände, bilden sich zudem starke Luftwirbel, die sich an den engsten Stellen zu sogenannten Wirbelzöpfen verbinden. Diese Verwirbelungen treffen unmittelbar auf die rotierenden Laufradschaufeln, wodurch ein Geräusch entsteht, das ein breitbandiges Rauschen und zusätzlich schmalbandige, tonale Schallanteile umfasst, die auch als Propellergeräusch oder Drehklang bezeichnet werden. Passive Schallschutzmaßnahmen sind hingegen oft mit großem Platzbedarf und hohen Kosten verbunden. Ein weiterer Nachteil vorwärtsgekrümmter Radiallüfter liegt darin, dass diese ein sich logarithmisch aufweitendes Schneckengehäuse benötigen, welches verhältnismäßig viel Bauraum in dem Abzugsgehäuse der Dunstabzugshauben beansprucht. Ohne die Verwendung eines solchen Schneckengehäuses können solche Radiallüfter allerdings ihre Funktion in der Dunstabzugshaube nicht erfüllen, da das Schneckengehäuse zum Aufbau eines Arbeitsdrucks bei vorwärtsgekrümmten Radiallüftern notwendig ist.Forward curved centrifugal fans (ie centrifugal fans with forward curved blades) are commonly used in fume hoods due to physical and psychoacoustic properties. Forward-curved centrifugal fans produce a so-called blade rotation sound, which depends on the speed and number of blades of the fan. If the housing walls are at different distances, strong air vortices are also formed, which combine to form so-called vortex braids at the narrowest points. This turbulence hits the rotating impeller blades directly, resulting in a noise that includes a broadband hiss and additional narrowband, tonal sound components, which are also referred to as propeller noise or rotary noise. Passive noise protection measures, on the other hand, are often associated with large space requirements and high costs. Another disadvantage of forward-curved centrifugal fans is that they are logarithmic need widening snail housing, which takes up a relatively large amount of space in the hood housing of the extractor hoods. However, without the use of such a worm housing, such radial fans cannot fulfill their function in the extractor hood, since the worm housing is necessary to build up a working pressure in forward-curved radial fans.
Es ist daher Aufgabe der Erfindung, eine verbesserte Dunstabzugshaube anzugeben, die einen effektiven Abzug von Kochdünsten ermöglicht und geringe Lärmemissionen im Betrieb bietet. Möglichst soll die Dunstabzugshaube dabei auch einen geringen Platzbedarf aufweisen.It is therefore the object of the invention to specify an improved extractor hood which enables cooking vapors to be removed effectively and offers low noise emissions during operation. If possible, the extractor hood should also have a small footprint.
Gelöst wird diese Aufgabe durch eine Dunstabzugshaube mit den Merkmalen des Anspruchs 1.This problem is solved by an extractor hood with the features of
Dadurch, dass zwischen dem Lüfter und dem Abscheideelement in dem Luftstrom ein Vorleitgitter angeordnet ist, können bei der erfindungsgemäßen Dunstabzugshaube eine geringe Lärmemissionen im Betrieb bei einem effektiven Abzug von Kochdünsten ermöglicht werden. Das Vorleitgitter ist in vorteilhafter Weise dazu ausgebildet, sich im Abzugsgehäuse im Luftstrom bildende Wirbelzöpfe beim Auftreffen auf das Vorleitgitter aufzuspalten und beim Durchfluss des Luftstromes durch das Vorleitgitter abzuschwächen. Hierdurch nimmt der Schalldruck im gesamten Frequenzbereich ab. Besonders der störende Drehklang im niederen Frequenzbereich lässt sich auf diese Weise deutlich abschwächen. Somit erhält man einen deutlich reduzierten Schalldruckpegel und ein als angenehmer empfundenes Betriebsgeräusch der Dunstabzugshaube. Bei der Anordnung der Gehäusewände können zudem Kompromisse zur Einsparung von Bauraum eingegangen werden, die an engeren Stellen zur Bildung von sogenannten Wirbelzöpfen führen würden, da diese Wirbelzöpfe effektiv von dem Vorleitgitter aufgespalten und abgeschwächt werden.Due to the fact that a preliminary guide grille is arranged in the air flow between the fan and the separating element, low noise emissions during operation with effective extraction of cooking vapors can be made possible in the extractor hood according to the invention. The inlet guide grille is advantageously designed to split up turbulence forming in the air flow in the extractor housing when it hits the inlet guide grille and weaken it as the air stream flows through the inlet guide grille. As a result, the sound pressure decreases in the entire frequency range. In particular, the disturbing rotary sound in the lower frequency range can be significantly reduced in this way. This results in a significantly reduced sound pressure level and the operating noise of the extractor hood that is perceived as more pleasant. When arranging the housing walls, compromises can also be made to save installation space, which would lead to the formation of so-called vortex braids at narrower points, since these vortex braids are effectively split up and weakened by the inlet guide vane.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. Es ist darauf hinzuweisen, dass die in den Ansprüchen einzeln aufgeführten Merkmale auch in beliebiger und technologisch sinnvoller Weise miteinander kombiniert werden können und somit weitere Ausgestaltungen der Erfindung aufzeigen.Advantageous refinements and developments of the invention result from the dependent claims. It should be pointed out that the features listed individually in the claims can also be used in any and can be combined with one another in a technologically sensible manner and thus show further refinements of the invention.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass das Vorleitgitter an einer Einlaufdüse des Lüfters angeordnet ist. Über die Einlaufdüse kann die angesaugte Luft des Luftstromes zielgerichtet von dem Vorleitgitter auf das Lüfterrad geleitet werden, wobei Wirbelzöpfe an dem Vorleitgitter effektiv aufgespalten und abgeschwächt werden.According to an advantageous embodiment of the invention, it is provided that the supply guide grid is arranged on an inlet nozzle of the fan. Via the inlet nozzle, the sucked-in air of the air flow can be guided in a targeted manner from the inlet grille to the fan wheel, with turbulence on the inlet grille being effectively split up and weakened.
Besonders bevorzugt ist eine Ausführungsform, die vorsieht, dass der Lüfter ein Radiallüfter mit rückwärtsgekrümmtem Lüfterrad ist. Hierdurch kann der Platzbedarf der Dunstabzugshaube einfach reduziert werden, da das rückwärtsgekrümmte Lüfterrad weniger Bauraum benötigt als ein vorwärtsgekrümmter Radiallüfter mit Schneckengehäuse. Durch den wesentlich besseren Wirkungsgrad der rückwärtsgekrümmten Radiallüfter kann der Abzug von Kochdünsten besonders effektiv erfolgen. Ohne das logarithmisch sich aufweitende Schneckengehäuse kann zudem die Größe der rückwärtsgekrümmten Lüfterräder gesteigert werden, sodass über geringere Drehzahlen des Lüfterrads auch die Lärmemissionen im Betrieb gesenkt werden können. Für den gleichen Arbeitspunkt, also ein gefördertes Volumen des Luftstromes bei einem gegebenen Anlagendruck, bspw. 600m3/h bei 300 Pa, benötigt die vorgeschlagene Dunstabzugshaube weniger Bauraum, ist leiser und erfordert in etwa die Hälfte des Stromverbrauchs gegenüber herkömmlichen Dunstabzugshauben mit vorwärtsgekrümmten Radiallüftern in Schneckengehäusen. Da auf das Schneckengehäuse verzichtet werden kann, lässt sich bei gleichem Bauraum auch ein größeres Lüfterrad verbauen, was dazu führt, dass die Drehzahl im gleichen Arbeitspunkt reduziert und somit die akustischen Eigenschaften verbessert werden können.An embodiment is particularly preferred which provides that the fan is a radial fan with a backward-curved fan wheel. As a result, the space requirement of the extractor hood can be easily reduced, since the backward-curved fan wheel requires less installation space than a forward-curved radial fan with a worm housing. Due to the significantly better efficiency of the backward-curved radial fans, the extraction of cooking vapors can be particularly effective. Without the logarithmically expanding worm housing, the size of the backward-curved fan wheels can also be increased, so that noise emissions during operation can also be reduced by lower fan wheel speeds. For the same working point, i.e. a conveyed volume of the air flow at a given system pressure, e.g. 600m 3 /h at 300 Pa, the proposed extractor hood requires less installation space, is quieter and requires around half the power consumption compared to conventional extractor hoods with forward-curved radial fans snail shells. Since the worm housing can be dispensed with, a larger fan wheel can also be installed with the same installation space, which means that the speed can be reduced at the same operating point and the acoustic properties can thus be improved.
Eine besonders vorteilhafte Ausführung der Erfindung bezieht sich darauf, dass das Lüfterrad einen Durchmesser von mindestens 170 mm, vorzugsweise mindestens 220 mm, weiter vorzugsweise mindestens 250 mm, aufweist. Mit einem rückwärtsgekrümmten Lüfterrad in dieser Größe lässt sich der Abzug von Kochdünsten besonders effektiv und gleichzeitig leise realisieren. Sich bildende Wirbelzöpfe werden hierbei von den Vorleitgitter effektiv ausgespalten und abgeschwächt, sodass der Einsatz von derart großen Lüfterrädern auch auf begrenztem Bauraum problemlos möglich ist. So kann das Lüfterrad bei geringere Drehzahlen auf einem kleineren Bauraum betrieben werden, als bisher üblich.A particularly advantageous embodiment of the invention relates to the fan wheel having a diameter of at least 170 mm, preferably at least 220 mm, more preferably at least 250 mm. With a backward-curved fan wheel of this size, cooking vapors can be extracted particularly effectively and quietly at the same time. Forming vortex braids are effectively split out by the inlet guide grille and weakened, so that the use of such large fan wheels is possible without any problems even in a limited space. In this way, the fan wheel can be operated at lower speeds in a smaller installation space than was previously the case.
Eine besonders vorteilhafte Ausführung der Erfindung sieht vor, dass eine Druckseite des Lüfters einen umfänglich um das Lüfterrad angeordneten Aufnahmeraum bildet. Mit dem um den Umfang des Lüfterrads angeordneten Aufnahmeraum wird der Lüfter im Abzugsgehäuse platzsparend eingehaust, wobei der an das Lüfterrad anschließende Aufnahmeraum bereits die Druckseite des Lüfters bildet.A particularly advantageous embodiment of the invention provides that a pressure side of the fan forms a receiving space arranged circumferentially around the fan wheel. With the accommodation space arranged around the circumference of the fan wheel, the fan is housed in the extractor housing in a space-saving manner, with the accommodation space adjoining the fan wheel already forming the pressure side of the fan.
Eine vorteilhafte Ausführung der Erfindung sieht vor, dass eine Bauhöhe des Aufnahmeraums axial zu einer Drehachse des Lüfterrads höchstens dem 1,6-fachen der Lüfterradhöhe entspricht. Mit einem derart begrenzten Aufnahmeraum kann in dem Abzugsgehäuse Bauraum eingespart werden. Hierdurch lassen sich die Vorteile des rückwärtsgekrümmtem Lüfterrads in der Dunstabzugshaube ausnutzen, da eben kein großvolumiges Schneckengehäuse zum Druckaufbau nötig ist.An advantageous embodiment of the invention provides that an overall height of the receiving space axially to an axis of rotation of the fan wheel corresponds to at most 1.6 times the height of the fan wheel. With such a limited accommodation space, space can be saved in the trigger housing. This allows the advantages of the backward-curved fan wheel in the extractor hood to be exploited, since no large-volume worm housing is required to build up the pressure.
Besonders vorteilhaft ist eine Ausführungsform, die vorsieht, dass eine Bautiefe des Aufnahmeraums in einer ersten Ausdehnungsrichtung radial zu einer Drehachse des Lüfterrads höchstens dem 1,4-fachen des Lüfterraddurchmessers entspricht. Über einen derart begrenzten Aufnahmeraum kann in der Dunstabzugshaube Bauraum eingespart werden. Daher lassen sich die Vorzüge des rückwärtsgekrümmtem Lüfterrads in der Dunstabzugshaube ausnutzen, da hier kein großvolumiges Lüftergehäuse für den Druckaufbau nötig ist.An embodiment is particularly advantageous which provides that an overall depth of the receiving space in a first direction of expansion radially to an axis of rotation of the fan wheel corresponds to at most 1.4 times the fan wheel diameter. Installation space can be saved in the extractor hood via such a limited accommodation space. The advantages of the backward-curved fan wheel can therefore be used in the extractor hood, since no large-volume fan housing is required for the pressure build-up.
Eine vorteilhafte Ausgestaltung sieht vor, dass eine Baubreite des Aufnahmeraums in einer zur ersten Ausdehnungsrichtung rechtwinkligen, zweiten Ausdehnungsrichtung radial zu der Drehachse des Lüfterrads höchstens dem 1,4-fachen des Lüfterraddurchmessers entspricht. Ein derart begrenzter Aufnahmeraum spart in der Dunstabzugshaube sehr viel Bauraum ein. Die Vorteile des rückwärtsgekrümmtem Lüfterrads lassen sich daher hier besonders gut ausnutzen. Mit dem Druckaufbau innerhalb des rückwärtsgekrümmten Lüfterrads ist in der Dunstabzugshaube kein großvolumiges Schneckengehäuse um das Lüfterrad nötig.An advantageous embodiment provides that an overall width of the receiving space in a direction perpendicular to the first direction of expansion, second direction of expansion radially to the axis of rotation of the fan wheel corresponds to at most 1.4 times the diameter of the fan wheel. Such a limited accommodation space saves a great deal of installation space in the extractor hood. The advantages of the backward-curved fan wheel can therefore be used particularly well here. With the pressure build-up within the backward-curved fan impeller, there is no need for a large-volume worm housing around the fan impeller in the extractor hood.
Gemäß einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass das Abzugsgehäuse zweigeteilt aufgebaut ist, sodass ein erster Teil des Abzugsgehäuses das Abscheideelement umfasst und ein zweiter Teil des Abzugsgehäuses den Lüfter. Mit der Zweiteilung des Abzugsgehäuses werden die Montage und die Variantenbildung bei der Dunstabzugshaube vereinfacht. Die Anordnung des Abscheideelements in dem ersten Teil des Abzugsgehäuses und die Anordnung des Lüfters in dem zweiten Teil des Abzugsgehäuses macht die Kombination unterschiedlicher erster und zweiter Teile des Abzugsgehäuses zu einer Dunstabzugshaube möglich. Auf diese Weise können leicht unterschiedliche Abscheideelemente mit unterschiedlichen Lüftern im Rahmen der Variantenbildung zu einer Dunstabzugshaube kombiniert werden, indem die Teile des Abzugsgehäuses miteinander verbunden werden.According to a preferred embodiment of the invention, it is provided that the hood housing is constructed in two parts, so that a first part of the hood housing includes the separating element and a second part of the hood housing includes the fan. The splitting of the extractor housing simplifies the assembly and the creation of variants for the extractor hood. The arrangement of the separating element in the first part of the hood housing and the arrangement of the fan in the second part of the hood housing makes it possible to combine different first and second parts of the hood housing to form an extractor hood. In this way, different separating elements can easily be combined with different fans within the scope of creating variants to form a fume hood by connecting the parts of the fume hood housing to one another.
Besonders vorteilhaft ist eine Ausführungsform, die vorsieht, dass das Vorleitgitter eine Gitterstegstruktur aufweist, die in einer Umfangsrichtung beabstandete Radialstege und in einer radialen Richtung beabstandete koaxiale Umfangsstege bildet, wobei die Stege jeweils in Strömungsrichtung des Luftstromes sich erstreckende Leitflächen bilden, wobei das Vorleitgitter einen radialen Außenrand und einen zentralen Mittenbereich um eine Mittelachse des Vorleitgitters aufweist, und eine von dem radialen Außenrand und dem Mittenbereich aufgespannte Hüllfläche im radialen Außenrand konvex gekrümmt und im Mittenbereich flach, insbesondere parallel zu einer Radialebene des Vorleitgitters ausgebildet ist, wobei die Umfangsstege in radialer Richtung in jeweils einem radialen Abstand zur Mittelachse des Vorleitgitters angeordnet sind und deren Leitflächen jeweils eine variierende Winkelanstellung gegenüber einer Axialebene des Vorleitgitters aufweisen. Die Gitterstegstruktur eignet sich besonders um platzsparend und effektiv Wirbelzöpfe beim Auftreffen auf das Vorleitgitter aufzuspalten und beim Durchfluss des Luftstromes durch das Vorleitgitter abzuschwächen. Die Dunstabzugshaube erreicht mit dieser Gitterstegstruktur einen verbesserten statischen Gesamtwirkungsgrad sowie eine weiter reduzierte Schallleistung. Mit der konvexen Hüllfläche im radialen Außenbereich erhöht sich die Festigkeit und Stabilität der gewölbten Form des Vorleitgitters. Die Radialstege und Umfangsstege können daher im Querschnitt besonders dünnwandig ausgeführt sein. Damit reduzieren sich die Anströmfläche der Stege und der durch die Stege erzeugte Strömungswiderstand. Außerdem wird eine durch die Stege selbst bedingte Wirbelbildung verhindert, die ansonsten wiederum zu einer Geräuschbildung führt.An embodiment is particularly advantageous that provides that the inlet guide vane has a lattice web structure, which forms radial webs spaced apart in a circumferential direction and coaxial circumferential webs spaced apart in a radial direction, with the webs each forming guide surfaces extending in the flow direction of the air flow, with the inlet guide vane grid having a radial has an outer edge and a central middle area around a central axis of the preliminary guide cascade, and an enveloping surface spanned by the radial outer edge and the middle area is convexly curved in the radial outer edge and flat in the middle area, in particular parallel to a radial plane of the preliminary guide cascade, with the circumferential webs in the radial direction in are each arranged at a radial distance from the central axis of the preliminary guide vane and whose guide surfaces each have a varying angular position in relation to an axial plane of the preliminary guide vane. The grid web structure is particularly suitable for splitting up turbulence in a space-saving and effective manner when it hits the inlet guide grille and weakening it when the air flow passes through the inlet guide grille. With this grid structure, the extractor hood achieves an improved overall static efficiency and a further reduced sound output. With the convex enveloping surface in the radial outer area, the strength and stability of the curved shape of the inlet grille. The radial webs and peripheral webs can therefore be designed to be particularly thin-walled in cross section. This reduces the inflow area of the webs and the flow resistance generated by the webs. In addition, the formation of vortices caused by the webs themselves is prevented, which in turn would otherwise lead to noise.
Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aufgrund der nachfolgenden Beschreibung sowie anhand der Zeichnungen, die ein Ausführungsbeispiel der Erfindung zeigen. Einander entsprechende Gegenstände oder Elemente sind in allen Figuren mit den gleichen Bezugszeichen versehen. Es zeigen:
Figur 1- erfindungsgemäße Dunstabzugshaube über Kochfeld,
Figur 2- perspektivische Ansicht,
Figur 3- Seitenansicht,
Figur 4- Explosionsdarstellung,
Figur 5- weitere Explosionsdarstellung,
Figur 6- seitliche Schnittansicht, und
Figur 7- Ansicht in Aufnahmeraum.
- figure 1
- extractor hood according to the invention over the hob,
- figure 2
- perspective view,
- figure 3
- side view,
- figure 4
- exploded view,
- figure 5
- further exploded view,
- figure 6
- lateral sectional view, and
- figure 7
- View in recording room.
In der
In der perspektivischen Ansicht gemäß
Auch in der Seitenansicht gemäß
Die
In
In den
- 11
- Dunstabzugshaubeextractor hood
- 22
- Kochdünstencooking fumes
- 33
- Kochfeldhob
- 44
- Luftstromairflow
- 55
- Abzugsgehäusetrigger housing
- 66
- Luftansaugöffnungair intake opening
- 77
- Luftauslassair outlet
- 88th
- LüfterFan
- 99
- Abscheideelementseparating element
- 1010
- Vorleitgitterinlet grille
- 1111
- Einlaufdüseinlet nozzle
- 1212
- Lüfterradfan wheel
- 1414
- Aufnahmeraumrecording room
- 1515
- Drehachseaxis of rotation
- 1616
- erster Teil des Abzugsgehäusesfirst part of the trigger housing
- 1717
- zweiter Teil des Abzugsgehäusessecond part of the trigger housing
- 1818
- Radialstegeradial ridges
- 1919
- Umfangsstegeperipheral ridges
- 2020
- Leitflächenbaffles
- 2121
- Außenrandouter edge
- 2222
- Mittenbereichmid range
- 2323
- Mittelachsecentral axis
- 2424
- AufnahmeRecording
- 2525
- Restölabscheiderresidual oil separator
- 2626
- Fettauffangschaledrip tray
- 2727
- Lüfterhalterfan holder
- ldld
- Lüfterraddurchmesserimpeller diameter
- bhbra
- Bauhöheheight
- lhlh
- Lüfterradhöhefan wheel height
- bbbb
- Baubreitewidth
- btbt
- Bautiefeoverall depth
Claims (10)
dass zwischen dem Lüfter (8) und dem Abscheideelement (9) in dem Luftstrom (4) ein Vorleitgitter (10) angeordnet ist.Extractor hood (1) for extracting cooking vapors (2) over a hob (3) by means of an air flow (4).
that between the fan (8) and the separating element (9) in the air flow (4) a preliminary guide grille (10) is arranged.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021129263.8A DE102021129263A1 (en) | 2021-11-10 | 2021-11-10 | extractor hood |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4180725A1 true EP4180725A1 (en) | 2023-05-17 |
Family
ID=83903097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP22202828.4A Pending EP4180725A1 (en) | 2021-11-10 | 2022-10-20 | Extractor hood |
Country Status (2)
Country | Link |
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EP (1) | EP4180725A1 (en) |
DE (1) | DE102021129263A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2159493A2 (en) * | 2008-09-01 | 2010-03-03 | BSH Bosch und Siemens Hausgeräte GmbH | Fumes extracting device |
US20110036340A1 (en) * | 2009-08-17 | 2011-02-17 | Ming-Hung Chu | High efficiency range hood |
EP3037671A1 (en) * | 2014-12-22 | 2016-06-29 | Indesit Company S.p.A. | Suction device for a hood, equipped with an electric connector |
WO2016116871A1 (en) * | 2015-01-22 | 2016-07-28 | Elica S.P.A. | Suction grid for an air guide of a domestic hood, air guide having such grid and domestic hood having such air guide. |
EP3225920A1 (en) * | 2016-03-31 | 2017-10-04 | BSH Hausgeräte GmbH | Extractor hood |
CN108980947A (en) * | 2018-09-27 | 2018-12-11 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood |
WO2021093068A1 (en) * | 2019-11-11 | 2021-05-20 | 佛山市顺德区美的洗涤电器制造有限公司 | Mesh cover, fan, and range hood |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29513292U1 (en) | 1995-08-18 | 1996-12-19 | Gutmann GmbH, 75417 Mühlacker | Extractor hood element |
DE102016107921A1 (en) | 2016-04-28 | 2017-11-02 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Extractor fan with diagonal fan |
DE102017209291A1 (en) | 2017-06-01 | 2018-12-06 | Ziehl-Abegg Se | Fan and guide grille for a fan |
-
2021
- 2021-11-10 DE DE102021129263.8A patent/DE102021129263A1/en active Pending
-
2022
- 2022-10-20 EP EP22202828.4A patent/EP4180725A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2159493A2 (en) * | 2008-09-01 | 2010-03-03 | BSH Bosch und Siemens Hausgeräte GmbH | Fumes extracting device |
US20110036340A1 (en) * | 2009-08-17 | 2011-02-17 | Ming-Hung Chu | High efficiency range hood |
EP3037671A1 (en) * | 2014-12-22 | 2016-06-29 | Indesit Company S.p.A. | Suction device for a hood, equipped with an electric connector |
WO2016116871A1 (en) * | 2015-01-22 | 2016-07-28 | Elica S.P.A. | Suction grid for an air guide of a domestic hood, air guide having such grid and domestic hood having such air guide. |
EP3225920A1 (en) * | 2016-03-31 | 2017-10-04 | BSH Hausgeräte GmbH | Extractor hood |
CN108980947A (en) * | 2018-09-27 | 2018-12-11 | 佛山市顺德区美的洗涤电器制造有限公司 | Range hood |
WO2021093068A1 (en) * | 2019-11-11 | 2021-05-20 | 佛山市顺德区美的洗涤电器制造有限公司 | Mesh cover, fan, and range hood |
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Publication number | Publication date |
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