EP2754967A1 - Extractor hood - Google Patents

Extractor hood Download PDF

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Publication number
EP2754967A1
EP2754967A1 EP13401137.8A EP13401137A EP2754967A1 EP 2754967 A1 EP2754967 A1 EP 2754967A1 EP 13401137 A EP13401137 A EP 13401137A EP 2754967 A1 EP2754967 A1 EP 2754967A1
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EP
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Prior art keywords
sound
layer
extractor hood
layers
perforated plate
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Granted
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EP13401137.8A
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German (de)
French (fr)
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EP2754967B1 (en
Inventor
Heinrich Adamietz
Christian Lauderlein
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Miele und Cie KG
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Miele und Cie KG
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Priority to EP17181708.3A priority Critical patent/EP3260782B1/en
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    • 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

Definitions

  • the invention relates to an extractor hood according to the preamble of claim 1, comprising a housing with a suction for vapors and a blower unit arranged in the housing whose suction side is fluidically connected to the suction area, wherein the blower unit is at least partially surrounded by a noise barrier, which Disrupting the propagation of the operating noise of the blower unit comprises at least one perforated plate layer and a layer comprising a porous material.
  • a noise reduced cooker hood known.
  • the hood has a housing, the inner surfaces are partially equipped with a sound-absorbing material.
  • Another type of noise reduction is from the utility model DE 299 16 895 known, in which case the inner surface of the fireplace housing of the hood is provided with surface-filling sound-absorbing material.
  • Another embodiment of the prior art discloses the DE 197 06 305 , wherein in the extractor hood described there are two suction fans, which are partially surrounded by a sound-deadening foam molding.
  • the WO 2008/090080 A1 referenced which also discloses noise reduced hood, wherein in the inflow duct of the fan unit sound-absorbing material is provided.
  • noise prevention devices it is considered disadvantageous that substantially only at a thickness of the noise prevention device, which corresponds to about 1 ⁇ 4 of the wavelength in particular the problematic frequencies of sound, a successful noise barrier is achieved. Especially at low frequencies, therefore, very thick noise barriers, in particular sound absorbers, are needed. For example, for the frequency 1000 Hz, this results in an optimum thickness of 80 mm. In most cases, the space, for example, with cooker hoods but only a thickness of the noise barrier device of 10 to 40 mm.
  • the invention thus raises the problem of developing an extractor hood and here in particular a sound obstruction device for an extractor hood, which in such a way overcomes the disadvantages described, wherein the noise prevention device is in particular to be able to provide a broadband noise barrier.
  • an extractor hood according to the invention is characterized in that in the acoustic barrier means a layer comprising a fibrous material is provided, which is arranged relative to the fan unit in front of the layer comprising the porous material, wherein the fibrous material allows the passage of sound and the passage of Fat and moisture at least hampered. It is advantageous that the sound can pass through the layer containing the fibrous material and thus better penetrate into the other layers of the noise prevention device, as is possible in the prior art, where as a protection against grease and moisture, a film-like layer for use comes.
  • the fibrous material may be, for example, a non-woven or the like.
  • the blower unit is associated with a frame frame unit, wherein the noise barrier device comprises at least one cassette-type sound-deadening unit and wherein the cassette-type sound obstruction unit can be removably inserted into the frame frame unit.
  • the noise barrier device comprises at least one cassette-type sound-deadening unit and wherein the cassette-type sound obstruction unit can be removably inserted into the frame frame unit.
  • the sound barrier device is sandwiched and comprises at least one further layer.
  • the noise prevention device hinders sound waves with low frequencies, in particular in the range> 1200 Hz and / or sound waves with high frequencies, in particular in the range ⁇ 1200 Hz and in particular the sound barrier device is designed for broadband noise impairment.
  • This advantageous effect can be achieved by the multi-layered, in particular sandwich-type structure the noise prevention device and in particular by the nature and the order of the individual layers, which are to be selected application-specific depending on the sound frequencies to be obstructed.
  • the sound barrier device comprises as a further layer a soundproof wall, in particular a wall formed from solid sheet metal.
  • the sound barrier device particularly preferably comprises, as a further layer, a stretched elastic membrane, in particular an elastic membrane formed from film, rubber or thin sheet metal, the membrane being attached to a frame or to a previous or subsequent layer of porous material or a layer comprising a perforated sheet, and in particular is glued on.
  • the acoustic barrier device comprises, as a further layer, an air layer, which is arranged in particular between the layer having an elastic membrane and the adjacent layer which has a perforated plate or a soundproof wall, the air layer in particular having a thickness of 1/6 of the total thickness of all layers the noise barrier has.
  • the sound obstructing device comprises at least one layer which at least partially attenuates and / or absorbs the sound and at least one layer which at least partially reflects the sound, wherein a layer comprising a porous material or an elastic membrane comprises a sound-absorbing or sound-absorbing layer Has effect and has a perforated plate or a reverberant wall layer having a sound-reflecting effect.
  • a layer at least partially absorbing or absorbing the sound is arranged between a layer which at least partially reflects the sound and another layer which at least partially reflects the sound.
  • the porous material is a foam, in particular Basotect foam or melamine foam, or rock wool.
  • the mentioned reverberant wall is preferably formed by a wall of the housing of the extractor hood.
  • this comprises at least two layers having a perforated plate, wherein the free surface of the perforation of the perforated plate is in particular at least 60% of the total area of the perforated plate and is greater than in the at least two layers relative to the blower closer the free area of the perforation of the perforated plate of the at least one further layer of these at least two layers, in which the free area of the perforations is in particular at least 40% of the total area of the perforated plate.
  • the noise prevention device preferably comprises at least two layers comprising a porous material, wherein the layer lying closer to the blower unit from this at least two layers has a material with a larger pore diameter or lower density than the porous material of the at least one further layer of these at least two layers.
  • a relatively large-pored porous material for absorbing low frequencies and a relatively small-pored material for absorbing high frequencies is advantageously suitable and provided.
  • the latter comprises at least two layers having an elastic membrane, wherein the elastic membrane is thinner than the elastic membrane of the at least one further layer of the at least two layers in the layer lying closer to these at least two layers relative to the blower unit.
  • the elastic membrane is thinner than the elastic membrane of the at least one further layer of the at least two layers in the layer lying closer to these at least two layers relative to the blower unit.
  • the invention also relates in the same way to the noise prevention device as such for a noise-reduced extractor hood according to the described features.
  • the noise prevention device is preferably constructed in a layer combination of layers with porous material usually rock wool, foam and layers with membrane or plate oscillator.
  • the membrane or the plate vibrator takes the sound of the vibration energy, especially in lower frequencies.
  • the following layer sequence is particularly preferably provided as the structure for a broadband noise barrier:
  • the first layer comprises a perforated plate whose free area is at least 60% of the total area of the perforated plate.
  • the perforation is largely uniformly distributed.
  • the single hole should in this case have an area of not more than 0.005% of the total area of the perforated plate.
  • the second layer has a fleece as a fibrous material, which although a noise-permeable However, it has moisture and grease repellency and therefore acts as a vapor and grease barrier.
  • the third layer used is a porous material mainly consisting of rock wool or foam, for example Basotect foam.
  • the fourth layer in turn comprises a perforated plate whose free area is at least 40% of the total area of the perforated plate.
  • the perforation is evenly distributed, the single hole should hereby have an area of at most about 0.0025% of the total area of the perforated plate.
  • the fifth layer is a thin elastic membrane (plate vibrator), which is stretched on the fourth layer.
  • the sixth layer is kept here as an air layer with a thickness of about 1/6 of the total thickness of the sound barrier device.
  • a seventh layer is provided which may be a soundproof wall such as a solid sheet as a finishing layer.
  • FIG. 1 shows in the perspective view of a sound obstruction device 1, which for a, for example, in FIG. 5 shown hood 15 is determined.
  • a blower unit 2 is arranged in which in the housing 16 of the hood 15, the suction side 3 is in fluid communication with the suction portion 17 of the hood 15.
  • the blower unit 2 is at least partially surrounded by the sound barrier device 1, which prevents the propagation of the operating noise of the blower unit 2, but at least significantly impedes it.
  • the sound obstruction device 1 comprises two sound obstruction units, as shown 4 and 5, which are sandwiched with sound-absorbing and sound-reflecting material layers in order to provide a broadband noise barrier.
  • the cassette-like trained sound obstruction units 4 and 5 are in this case substantially aligned in parallel in the housing 16 of the hood 15 and the blower unit 2, wherein the cassette-like sound obstruction units 4 and 5 can be inserted into and removed from a frame frame unit 20, as in of the FIG. 1 is shown.
  • a noise prevention unit 4, 5 is provided in the frame frame unit 20 on both sides of the blower unit 2.
  • the first layer comprises a perforated plate 6, wherein the free area is at least 60% of the total area of the perforated plate.
  • the perforation is largely uniformly distributed.
  • the second layer in this case has a nonwoven fabric 11 as a fibrous material, which indeed has a noise-permeable but moisture and grease-repellent property and thus acts in particular as a vapor and grease barrier.
  • a porous material 12 consisting of Basotect foam is used here.
  • the fourth layer in turn comprises a perforated plate 7, wherein the free area is at least 40% of the total area of the perforated plate and the perforation is evenly distributed.
  • a thin elastic membrane 13 which is thus clamped on the perforated plate 7 on the fourth layer.
  • the sixth layer is kept here as an air layer 14 with a thickness of approximately 1/6 of the total thickness of the sound obstruction unit 4 or 5.
  • a seventh layer is provided, which is a sound-resistant wall 8 made of a solid sheet as a finishing layer.
  • the reverberant end wall 8 may be the chimney wall of the housing 16 of the hood.
  • the free area of the perforations of the first perforated plate is at least 60% of the total area of the first perforated plate, wherein the free area of the perforations of the second perforated plate 7, not shown in detail, at least 40% of the total area of the second perforated plate 7.
  • the air layer occupies about 1/6 of the total thickness of the sound-deadening unit 4, 5.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Ventilation (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The hood has a housing with an intake region for vapor. A blower unit (2) is arranged in the housing. A suction side (3) of the blower unit is fluidly connected with the intake region. The blower unit is partially surrounded by a sound inhibiting device (1). A fibrous material containing layer is arranged relative to the blower unit in front of a porous material such as melamine foam material, containing layer, where fibrous material allows passage of sound, and hinders passage of moisture and grease.

Description

Die Erfindung betrifft eine Dunstabzugshaube gemäß dem Oberbegriff des Anspruchs 1, umfassend ein Gehäuse mit einem Ansaugbereich für Wrasen und einer in dem Gehäuse angeordneten Gebläseeinheit deren Saugseite mit dem Ansaugbereich strömungstechnisch in Verbindung steht, wobei die Gebläseeinheit zumindest teilweise mit einer Schallbehinderungseinrichtung umgeben ist, welche zur Behinderung der Ausbreitung der Betriebsgeräusche der Gebläseeinheit zumindest eine ein Lochblech aufweisende Schicht und eine ein poröses Material aufweisende Schicht umfasst.The invention relates to an extractor hood according to the preamble of claim 1, comprising a housing with a suction for vapors and a blower unit arranged in the housing whose suction side is fluidically connected to the suction area, wherein the blower unit is at least partially surrounded by a noise barrier, which Disrupting the propagation of the operating noise of the blower unit comprises at least one perforated plate layer and a layer comprising a porous material.

Aus dem Stand der Technik ist beispielsweise gemäß der DE 44 43 176 eine geräuschereduzierte Dunstabzugshaube bekannt. Die Dunstabzugshaube weist ein Gehäuse auf, wobei dessen Innenflächen zum Teil mit einem schallbehindernden Material ausgestattet sind. Eine andere Art der Geräuschreduzierung ist aus dem Gebrauchsmuster DE 299 16 895 bekannt, wobei hierbei die Innenfläche des Kamingehäuses der Dunstabzugshaube mit flächenfüllendem schallbehinderndem Material versehen ist. Eine weitere Ausführungsform des Standes der Technik offenbart die DE 197 06 305 , wobei bei der dort beschriebenen Dunstabzugshaube zwei Sauggebläse vorhanden sind, welche von einem schallbehindernden Schaumstoffformteil teilweise umgeben sind. Schließlich wird hinsichtlich des Standes der Technik noch auf die WO 2008/090080 A1 verwiesen, die ebenfalls geräuschreduzierte Dunstabzugshaube offenbart, bei der in dem Anströmkanal der Gebläseeinheit schallbehinderndes Material vorgesehen ist.From the prior art, for example, according to the DE 44 43 176 a noise reduced cooker hood known. The hood has a housing, the inner surfaces are partially equipped with a sound-absorbing material. Another type of noise reduction is from the utility model DE 299 16 895 known, in which case the inner surface of the fireplace housing of the hood is provided with surface-filling sound-absorbing material. Another embodiment of the prior art discloses the DE 197 06 305 , wherein in the extractor hood described there are two suction fans, which are partially surrounded by a sound-deadening foam molding. Finally, with regard to the state of the art, the WO 2008/090080 A1 referenced, which also discloses noise reduced hood, wherein in the inflow duct of the fan unit sound-absorbing material is provided.

Bei all diesen aus dem Stand der Technik bekannten Schallbehinderungseinrichtungen wird es als nachteilig angesehen, dass im Wesentlichen erst bei einer Dicke der Schallbehinderungseinrichtung, die etwa ¼ der Wellenlänge insbesondere der problematischen Frequenzen des Schalls entsprecht, eine erfolgreiche Schallbehinderung erreicht wird. Besonders bei tiefen Frequenzen werden daher sehr dicke Schallbehinderungseinrichtungen, insbesondere Schallabsorber, benötigt. Zum Beispiel für die Frequenz 1.000 Hz ergibt sich so eine optimale Dicke von 80 mm. In den meisten Fällen lässt der Bauraum zum Beispiel bei Dunstabzugshauben jedoch nur eine Dicke der Schallbehinderungseinrichtung von 10 bis 40 mm zu.In all of these known from the prior art, noise prevention devices, it is considered disadvantageous that substantially only at a thickness of the noise prevention device, which corresponds to about ¼ of the wavelength in particular the problematic frequencies of sound, a successful noise barrier is achieved. Especially at low frequencies, therefore, very thick noise barriers, in particular sound absorbers, are needed. For example, for the frequency 1000 Hz, this results in an optimum thickness of 80 mm. In most cases, the space, for example, with cooker hoods but only a thickness of the noise barrier device of 10 to 40 mm.

Der Erfindung stellt sich somit das Problem eine Dunstabzugshaube und hier insbesondere eine Schallbehinderungseinrichtung für eine Dunstabzugshaube derart weiterzubilden, welche die geschilderten Nachteile überwindet, wobei die Schallbehinderungseinrichtung insbesondere in der Lage sein soll, eine breitbandige Schallbehinderung bereitzustellen.The invention thus raises the problem of developing an extractor hood and here in particular a sound obstruction device for an extractor hood, which in such a way overcomes the disadvantages described, wherein the noise prevention device is in particular to be able to provide a broadband noise barrier.

Erfindungsgemäß wird dieses Problem mit einer Dunstabzugshaube mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen. Erfindungsgemäß wird das genannte Problem insbesondere mit einer Schallbehinderungseinrichtung für eine geräuschreduzierte Dunstabzugshaube gelöst.According to the invention this problem is solved with an extractor hood with the features of claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims. According to the invention, said problem is solved, in particular, with a noise prevention device for a noise-reduced extractor hood.

Demnach zeichnet sich eine erfindungsgemäße Dunstabzugshaube dadurch aus, dass bei der Schallbehinderungseinrichtung eine ein faseriges Material aufweisende Schicht vorgesehen ist, welche relativ zu der Gebläseeinheit vor der das poröse Material aufweisenden Schicht angeordnet ist, wobei das faserige Material den Durchtritt von Schall ermöglicht und den Durchtritt von Fett und Feuchtigkeit zumindest behindert. Vorteilhaft ist dabei, dass der Schall durch die das faserige Material aufweisende Schicht durchtreten und somit in die weiteren Schichten der Schallbehinderungseinrichtung besser eindringen kann, als es beim bisher bekannten Stand der Technik möglich ist, wo als Schutz gegen Fett und Feuchtigkeit eine folienartige Schicht zum Einsatz kommt. Das faserige Material kann zum Beispiel ein Vlies oder Ähnliches sein.Accordingly, an extractor hood according to the invention is characterized in that in the acoustic barrier means a layer comprising a fibrous material is provided, which is arranged relative to the fan unit in front of the layer comprising the porous material, wherein the fibrous material allows the passage of sound and the passage of Fat and moisture at least hampered. It is advantageous that the sound can pass through the layer containing the fibrous material and thus better penetrate into the other layers of the noise prevention device, as is possible in the prior art, where as a protection against grease and moisture, a film-like layer for use comes. The fibrous material may be, for example, a non-woven or the like.

Gemäß einer bevorzugten Ausführungsform ist der Gebläseeinheit eine Rahmengestelleinheit zugeordnet, wobei die Schallbehinderungseinrichtung wenigstens eine kassettenartige Schallbehinderungseinheit umfasst und wobei die kassettenartige Schallbehinderungseinheit in die Rahmengestelleinheit entnehmbar einsetzbar ist. Vorteilhaft an der kassettenartigen Bauweise ist die einfache Austauschbarkeit der einzelnen Schallbehinderungseinheiten. Auch ist es denkbar eine Dunstabzugshaube zunächst ohne eine Schallbehinderungseinrichtung aber mit vorhandener Rahmengestelleinheit im Bereich der Gebläseeinheit und zusätzlich separat die kassettenartigen Schallbehinderungseinheiten anzubieten, so dass ein Kunde die Schallbehinderungseinrichtung zu einem späteren Zeitpunkt bei Bedarf nachrüsten kann.According to a preferred embodiment, the blower unit is associated with a frame frame unit, wherein the noise barrier device comprises at least one cassette-type sound-deadening unit and wherein the cassette-type sound obstruction unit can be removably inserted into the frame frame unit. An advantage of the cassette-like design is the easy interchangeability of the individual noise prevention units. It is also conceivable initially to provide an extractor hood without a noise prevention device but with an existing frame frame unit in the area of the blower unit and additionally separately the cassette-type sound obstruction units, so that a customer can retrofit the noise prevention device at a later time if necessary.

Nach einer vorteilhaften Ausgestaltung wird vorgeschlagen, dass die Schallbehinderungseinrichtung sandwichartig aufgebaut ist und wenigstens eine weitere Schicht umfasst. Vorteilhafter Weise behindert die Schallbehinderungseinrichtung Schallwellen mit tiefen Frequenzen insbesondere im Bereich > 1.200 Hz und/oder Schallwellen mit hohen Frequenzen insbesondere im Bereich < 1.200 Hz und insbesondere ist die Schallbehinderungseinrichtung zur breitbandigen Schallbehinderung ausgebildet. Erreichbar ist diese vorteilhafte Wirkung durch den mehrschichtigen insbesondere sandwichartigen Aufbau der Schallbehinderungseinrichtung und insbesondere durch die Beschaffenheit und die Reihenfolge der einzelnen Schichten, welche je nach zu behindernden Schallfrequenzen anwendungsspezifisch auszuwählen sind.According to an advantageous embodiment, it is proposed that the sound barrier device is sandwiched and comprises at least one further layer. Advantageously, the noise prevention device hinders sound waves with low frequencies, in particular in the range> 1200 Hz and / or sound waves with high frequencies, in particular in the range <1200 Hz and in particular the sound barrier device is designed for broadband noise impairment. This advantageous effect can be achieved by the multi-layered, in particular sandwich-type structure the noise prevention device and in particular by the nature and the order of the individual layers, which are to be selected application-specific depending on the sound frequencies to be obstructed.

Bevorzugt umfasst die Schallbehinderungseinrichtung als weitere Schicht eine schallharte Wand, insbesondere eine aus Vollblech gebildete Wand. Besonders bevorzugt umfasst die Schallbehinderungseinrichtung als weitere Schicht eine gespannte elastische Membran, insbesondere eine aus Folie, Gummi oder dünnem Blech gebildete elastische Membran, wobei die Membran an einem Rahmen oder an einer vorhergehenden oder nachfolgenden Schicht porösen Materials oder einer ein Lochblech aufweisenden Schicht angebracht und insbesondere angeklebt ist. Besonders bevorzugt umfasst die Schallbehinderungseinrichtung als weitere Schicht eine Luftschicht, welche insbesondere zwischen der eine elastischen Membran aufweisenden Schicht und der benachbarten Schicht angeordnet ist, welche ein Lochblech oder eine schallharte Wand aufweist, wobei die Luftschicht insbesondere eine Dicke von 1/6 der Gesamtdicke aller Schichten der Schallbehinderung besitzt.Preferably, the sound barrier device comprises as a further layer a soundproof wall, in particular a wall formed from solid sheet metal. The sound barrier device particularly preferably comprises, as a further layer, a stretched elastic membrane, in particular an elastic membrane formed from film, rubber or thin sheet metal, the membrane being attached to a frame or to a previous or subsequent layer of porous material or a layer comprising a perforated sheet, and in particular is glued on. Particularly preferably, the acoustic barrier device comprises, as a further layer, an air layer, which is arranged in particular between the layer having an elastic membrane and the adjacent layer which has a perforated plate or a soundproof wall, the air layer in particular having a thickness of 1/6 of the total thickness of all layers the noise barrier has.

Nach einer besonders vorteilhaften Ausgestaltung umfasst die Schallbehinderungseinrichtung zumindest eine Schicht, welche den Schall wenigstens teilweise dämpft und/oder absorbiert und zumindest eine Schicht, welche den Schall wenigstens teilweise reflektiert, wobei eine ein poröses Material oder eine elastische Membran aufweisende Schicht eine schalldämpfende bzw. schallabsorbierende Wirkung besitzt und eine ein Lochblech oder eine schallharte Wand aufweisende Schicht mit einer schallreflektierenden Wirkung besitzt. In bevorzugter Weiterbildung ist zwischen einer den Schall wenigstens teilweise reflektierende Schicht und einer weiteren den Schall wenigstens teilweise reflektierenden Schicht wenigstens eine den Schall wenigstens teilweise dämpfende oder absorbierende Schicht angeordnet.According to a particularly advantageous embodiment, the sound obstructing device comprises at least one layer which at least partially attenuates and / or absorbs the sound and at least one layer which at least partially reflects the sound, wherein a layer comprising a porous material or an elastic membrane comprises a sound-absorbing or sound-absorbing layer Has effect and has a perforated plate or a reverberant wall layer having a sound-reflecting effect. In a preferred development, at least one layer at least partially absorbing or absorbing the sound is arranged between a layer which at least partially reflects the sound and another layer which at least partially reflects the sound.

Nach einer zweckmäßigen Ausgestaltung ist das poröse Material ein Schaumstoff, insbesondere Basotect-Schaumstoff oder Melamin-Schaumstoff, oder Steinwolle. Die erwähnte schallharte Wand ist bevorzugt von einer Wand des Gehäuses der Dunstabzugshaube gebildet.According to an expedient embodiment, the porous material is a foam, in particular Basotect foam or melamine foam, or rock wool. The mentioned reverberant wall is preferably formed by a wall of the housing of the extractor hood.

Nach einer besonders vorteilhaften Ausgestaltung der Schallbehinderungseinrichtung umfasst diese wenigstens zwei ein Lochblech aufweisende Schichten, wobei bei der von diesen wenigstens zwei Schichten relativ zur Gebläseeinheit näher liegenden Schicht die freie Fläche der Lochung des Lochblechs insbesondere mindestens 60% der Gesamtfläche des Lochblechs beträgt und größer ist als die freie Fläche der Lochung des Lochblechs der wenigstens einer weiteren Schicht dieser wenigstens zwei Schichten, bei der die freie Fläche der Lochungen insbesondere mindestens 40% der Gesamtfläche des Lochblechs beträgt.According to a particularly advantageous embodiment of the noise barrier device, this comprises at least two layers having a perforated plate, wherein the free surface of the perforation of the perforated plate is in particular at least 60% of the total area of the perforated plate and is greater than in the at least two layers relative to the blower closer the free area of the perforation of the perforated plate of the at least one further layer of these at least two layers, in which the free area of the perforations is in particular at least 40% of the total area of the perforated plate.

Bevorzugt umfasst die Schallbehinderungseinrichtung wenigstens zwei ein poröses Material aufweisende Schichten, wobei die von diesem wenigstens zwei Schichten relativ zur Gebläseeinheit näher liegende Schicht ein Material mit größerem Porendurchmesser bzw. geringere Dichte aufweist als das poröse Material der wenigstens einer weiteren Schicht dieser wenigstens zwei Schichten. Dabei ist vorteilhafter Weise ein relativ großporiges poröses Material zur Absorbtion tiefer Frequenzen und ein relativ kleinporiges Material zur Absorbtion hoher Frequenzen geeignet und vorgesehen.The noise prevention device preferably comprises at least two layers comprising a porous material, wherein the layer lying closer to the blower unit from this at least two layers has a material with a larger pore diameter or lower density than the porous material of the at least one further layer of these at least two layers. In this case, a relatively large-pored porous material for absorbing low frequencies and a relatively small-pored material for absorbing high frequencies is advantageously suitable and provided.

In bevorzugter Ausbildung der Schallbehinderungseinrichtung umfasst diese wenigstens zwei eine elastische Membran aufweisende Schichten, wobei bei der von diesen wenigstens zwei Schichten relativ zur Gebläseeinheit näher liegenden Schicht die elastische Membran dünner ist als die elastische Membran der wenigstens einen weiteren Schicht der wenigstens zwei Schichten. Dabei ist vorteilhafter Weise eine relativ dünne Membran zur Absorbtion tiefer Frequenzen und eine relativ dicke Membran zur Absorbtion hoher Frequenzen geeignet und vorgesehen.In a preferred embodiment of the sound barrier device, the latter comprises at least two layers having an elastic membrane, wherein the elastic membrane is thinner than the elastic membrane of the at least one further layer of the at least two layers in the layer lying closer to these at least two layers relative to the blower unit. In this case, advantageously, a relatively thin membrane for Absorbtion low frequencies and a relatively thick membrane for absorption of high frequencies is suitable and provided.

Die Erfindung betrifft in gleicher Weise auch die Schallbehinderungseinrichtung als solche für eine geräuschreduzierte Dunstabzugshaube nach den beschriebenen Merkmalen.The invention also relates in the same way to the noise prevention device as such for a noise-reduced extractor hood according to the described features.

Je nach Ausführungsform bestehen die mit der Erfindung erreichbaren Vorteile insbesondere darin, dass Geräusche auch in tieferen Frequenzen schon bei relativ dünnem Aufbau deutlich reduziert werden, was auf den mehrschichtigen insbesondere sandwichartigen Aufbau zurückzuführen ist. Die Schallbehinderungseinrichtung wird bevorzugt in einer Schichtenkombination aus Schichten mit porösem Material in der Regel Steinwolle, Schaumstoff und Schichten mit Membran bzw. Plattenschwinger aufgebaut. Die Membran bzw. der Plattenschwinger entnimmt dem Schall die Schwingungsenergie besonders in tieferen Frequenzen. Durch einen bevorzugten Einsatz mehrerer paralleler Lochbleche entstehen Kammern, die das Prinzip der Schallreflektion nutzen. Der Schall durchläuft mehrfach die Innenräume, dabei kommt es zu einer Mittelung der Schalldruckamplituden, was eine Reduzierung der Schalldruckspitzen zur Folge hat. Besonders bevorzugt wird als Aufbau für eine breitbandige Schallbehinderungseinrichtung folgende Schichtfolge, beginnend mit der in Bezug zur Gebläseeinheit nächstliegenden Schicht, bereitgestellt: Die erste Schicht umfasst ein Lochblech dessen freie Fläche mindestens 60% der gesamten Fläche des Lochbleches beträgt. Die Lochung ist dabei weitgehend gleichmäßig verteilt. Das Einzelloch sollte hierbei eine Fläche von maximal ca. 0,005% der gesamten Fläche des Lochbleches haben. Die zweite Schicht verfügt hierbei über ein Vlies als faseriges Material, welches zwar eine geräuschdurchlässige jedoch feuchtigkeits- und fettabweisend Eigenschaft hat und somit insbesondere als Dampf- und Fettsperre fungiert. Als dritte Schicht wird ein poröses Material vorwiegend bestehend aus Steinwolle oder Schaumstoff zum Beispiel Basotect-Schaumstoff verwendet. Die vierte Schicht umfasst wiederum ein Lochblech, dessen freie Fläche mindestens 40% der gesamten Fläche des Lochbleches beträgt. Die Lochung ist gleichmäßig verteilt, das Einzelloch soll hierbei eine Fläche von maximal ca. 0,0025% der gesamten Fläche des Lochbleches haben. Bei der fünften Schicht handelt es sich um eine dünne elastische Membran (Plattenschwinger), die auf der vierten Schicht aufgespannt ist. Die sechste Schicht wird hier als eine Luftschicht mit einer Dicke von ca. 1/6 der gesamten Dicke der Schallbehinderungseinrichtung vorgehalten. Als letztes wird eine siebte Schicht vorgesehen, welche als Abschlussschicht eine schallharte Wand wie zum Beispiel ein Vollblech sein kann.Depending on the embodiment, the achievable with the invention advantages are in particular that noises are significantly reduced even at relatively low frequencies even at relatively thin structure, which is due to the multi-layered particular sandwich-like structure. The noise prevention device is preferably constructed in a layer combination of layers with porous material usually rock wool, foam and layers with membrane or plate oscillator. The membrane or the plate vibrator takes the sound of the vibration energy, especially in lower frequencies. By a preferred use of several parallel perforated plates chambers are created, which use the principle of sound reflection. The sound passes through the interiors several times, resulting in an averaging of the sound pressure amplitudes, resulting in a reduction of the sound pressure peaks. The following layer sequence, starting with the layer closest to the blower unit, is particularly preferably provided as the structure for a broadband noise barrier: The first layer comprises a perforated plate whose free area is at least 60% of the total area of the perforated plate. The perforation is largely uniformly distributed. The single hole should in this case have an area of not more than 0.005% of the total area of the perforated plate. The second layer has a fleece as a fibrous material, which although a noise-permeable However, it has moisture and grease repellency and therefore acts as a vapor and grease barrier. The third layer used is a porous material mainly consisting of rock wool or foam, for example Basotect foam. The fourth layer in turn comprises a perforated plate whose free area is at least 40% of the total area of the perforated plate. The perforation is evenly distributed, the single hole should hereby have an area of at most about 0.0025% of the total area of the perforated plate. The fifth layer is a thin elastic membrane (plate vibrator), which is stretched on the fourth layer. The sixth layer is kept here as an air layer with a thickness of about 1/6 of the total thickness of the sound barrier device. Lastly, a seventh layer is provided which may be a soundproof wall such as a solid sheet as a finishing layer.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt:

Figur 1
eine perspektivische Ansicht einer Gebläseeinheit für eine Dunstabzugshaube, welche von einer Schallbehinderungseinrichtung mit mehreren Schallbehinderungseinheiten umgeben ist;
Figur 2
eine Detailansicht der Schallbehinderungseinrichtung bzw. Schallbehinderungseinheit im Aufbau ihrer Schichten;
Figur 3
eine Rückansicht einer Schallbehinderungseinheit;
Figur 4
eine Vorderansicht einer Schallbehinderungseinrichtung und
Figur 5
eine perspektivische Ansicht einer Dunstabzugshaube, insbesondere eine Inseldunstabzugshaube.
An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows:
FIG. 1
a perspective view of a blower unit for an extractor hood, which is surrounded by a noise prevention device with a plurality of sound obstruction units;
FIG. 2
a detailed view of the sound obstruction or Schallbehinderungseinheit in the structure of their layers;
FIG. 3
a rear view of a sound obstruction unit;
FIG. 4
a front view of a noise prevention device and
FIG. 5
a perspective view of an extractor hood, in particular an island extractor hood.

Die Figur 1 zeigt in der perspektivischen Darstellung eine Schallbehinderungseinrichtung 1, welche für eine zum Beispiel in Figur 5 gezeigte Dunstabzugshaube 15 bestimmt ist. In dem in Gehäuse 16 der Dunstabzugshaube 15 ist eine Gebläseeinheit 2 angeordnet, deren Saugseite 3 mit dem Ansaugbereich 17 der Dunstabzugshaube 15 strömungstechnisch in Verbindung steht. Die Gebläseeinheit 2 ist dabei wie dargestellt zumindest teilweise mit der Schallbehinderungseinrichtung 1 umgeben, welche die Ausbreitung der Betriebsgeräusche der Gebläseeinheit 2 unterbindet zumindest jedoch deutlich behindert. Die Schallbehinderungseinrichtung 1 umfasst hierbei wie gezeigt zwei Schallbehinderungseinheiten 4 und 5, welche im Aufbau sandwichartig mit schalldämpfenden sowie schallreflektierenden Materialschichten zur Bereitstellung einer breitbandigen Schallbehinderung bestückt sind. Die kassettenartig ausgebildeten Schallbehinderungseinheiten 4 und 5 liegen hierbei im Wesentlichen parallel ausgerichtet in dem Gehäuse 16 der Dunstabzugshaube 15 bzw. zu der Gebläseeinheit 2, wobei die kassettenartige Schallbehinderungseinheiten 4 und 5 in eine Rahmengestelleinheit 20 einsetzbar und aus dieser auch wieder entnehmbar sind, wie dies in der Figur 1 dargestellt ist. Hierbei ist beidseitig der Gebläseeinheit 2 eine Schallbehinderungseinheit 4, 5 in der Rahmengestelleinheit 20 vorgesehen.The FIG. 1 shows in the perspective view of a sound obstruction device 1, which for a, for example, in FIG. 5 shown hood 15 is determined. In which in the housing 16 of the hood 15, a blower unit 2 is arranged, the suction side 3 is in fluid communication with the suction portion 17 of the hood 15. As shown, the blower unit 2 is at least partially surrounded by the sound barrier device 1, which prevents the propagation of the operating noise of the blower unit 2, but at least significantly impedes it. In this case, the sound obstruction device 1 comprises two sound obstruction units, as shown 4 and 5, which are sandwiched with sound-absorbing and sound-reflecting material layers in order to provide a broadband noise barrier. The cassette-like trained sound obstruction units 4 and 5 are in this case substantially aligned in parallel in the housing 16 of the hood 15 and the blower unit 2, wherein the cassette-like sound obstruction units 4 and 5 can be inserted into and removed from a frame frame unit 20, as in of the FIG. 1 is shown. In this case, a noise prevention unit 4, 5 is provided in the frame frame unit 20 on both sides of the blower unit 2.

Wie insbesondere aus der Figur 2 in der Detailansicht der Schallbehinderungseinheit 4 bzw. 5 zu erkennen ist, umfasst die erste Schicht ein Lochblech 6, wobei dessen freie Fläche mindestens 60% der gesamten Fläche des Lochbleches beträgt. Die Lochung ist dabei weitgehend gleichmäßig verteilt. Die zweite Schicht verfügt hierbei über ein Vlies 11 als faseriges Material, welches zwar eine geräuschdurchlässige jedoch feuchtigkeits- und fettabweisend Eigenschaft hat und somit insbesondere als Dampf- und Fettsperre fungiert. Als dritte Schicht wird ein poröses Material 12 hier bestehend aus Basotect-Schaumstoff verwendet. Die vierte Schicht umfasst wiederum ein Lochblech 7, wobei dessen freie Fläche mindestens 40% der gesamten Fläche des Lochbleches beträgt und die Lochung gleichmäßig verteilt ist. Bei der fünften Schicht handelt es sich um eine dünne elastische Membran 13, die auf der vierten Schicht also auf dem Lochblech 7 aufgespannt ist. Die sechste Schicht wird hier als eine Luftschicht 14 mit einer Dicke von ca. 1/6 der gesamten Dicke der Schallbehinderungseinheit 4 bzw. 5 vorgehalten. Als letztes wird eine siebte Schicht vorgesehen, welche als Abschlussschicht eine schallharte Wand 8 aus einem Vollblech ist.As in particular from the FIG. 2 can be seen in the detailed view of the sound obstruction unit 4 and 5, the first layer comprises a perforated plate 6, wherein the free area is at least 60% of the total area of the perforated plate. The perforation is largely uniformly distributed. The second layer in this case has a nonwoven fabric 11 as a fibrous material, which indeed has a noise-permeable but moisture and grease-repellent property and thus acts in particular as a vapor and grease barrier. As the third layer, a porous material 12 consisting of Basotect foam is used here. The fourth layer in turn comprises a perforated plate 7, wherein the free area is at least 40% of the total area of the perforated plate and the perforation is evenly distributed. In the fifth layer is a thin elastic membrane 13, which is thus clamped on the perforated plate 7 on the fourth layer. The sixth layer is kept here as an air layer 14 with a thickness of approximately 1/6 of the total thickness of the sound obstruction unit 4 or 5. Finally, a seventh layer is provided, which is a sound-resistant wall 8 made of a solid sheet as a finishing layer.

Nach einer vorteilhaften Ausgestaltung der Erfindung kann hierbei die schallharte Abschlusswand 8 die Kaminwand des Gehäuses 16 der Dunstabzugshaube sein.According to an advantageous embodiment of the invention in this case the reverberant end wall 8 may be the chimney wall of the housing 16 of the hood.

Wie insbesondere aus der Figur 1, 2, und 4 zu erkennen ist, beträgt die freie Fläche der Lochungen des ersten Lochblechs mindestens 60% der Gesamtfläche des ersten Lochblechs, wobei die freie Fläche der Lochungen des zweiten Lochblechs 7, nicht näher dargestellt, mindestens 40% der Gesamtfläche des zweiten Lochblechs 7 beträgt. Die Luftschicht als solches nimmt hierbei etwa 1/6 der Gesamtdicke der Schallbehinderungseinheit 4, 5 ein.As in particular from the FIG. 1 . 2 , and 4 can be seen, the free area of the perforations of the first perforated plate is at least 60% of the total area of the first perforated plate, wherein the free area of the perforations of the second perforated plate 7, not shown in detail, at least 40% of the total area of the second perforated plate 7. As such, the air layer occupies about 1/6 of the total thickness of the sound-deadening unit 4, 5.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1.1.
SchallbehinderungseinrichtungSound inhibiting means
2.Second
Gebläseeinheitblower unit
3.Third
Saugseite der GebläseeinheitSuction side of the blower unit
4.4th
SchallbehinderungseinheitSound disability unit
5.5th
SchallbehinderungseinheitSound disability unit
6.6th
erstes Lochblechfirst perforated plate
7.7th
zweites Lochblechsecond perforated plate
8.8th.
schallharte Wand, Abschlusswandreverberant wall, end wall
11.11th
faseriges Material, Vliesfibrous material, fleece
12.12th
poröses Material, Schaumstoffporous material, foam
13.13th
Membranmembrane
14.14th
Luftschichtlayer of air
15.15th
DunstabzugshaubeHood
16.16th
Gehäuse der DunstabzugshaubeHousing of the extractor hood
17.17th
Ansaugbereich der DunstabzugshaubeIntake area of the extractor hood
20.20th
RahmengestelleinheitRack unit

Claims (15)

Dunstabzugshaube (15) umfassend ein Gehäuse (16) mit einem Ansaugbereich (17) für Wrasen und einer in dem Gehäuse angeordneten Gebläseeinheit (2), deren Saugseite (3) mit dem Ansaugbereich (17) strömungstechnisch in Verbindung steht, wobei die Gebläseeinheit (2) zumindest teilweise mit einer Schallbehinderungseinrichtung (1) umgeben ist, welche zur Behinderung der Ausbreitung der Betriebsgeräusche der Gebläseeinheit (2) zumindest eine ein Lochblech (6) aufweisende Schicht und eine ein poröses Material aufweisende Schicht (12) umfasst,
dadurch gekennzeichnet,
dass eine ein faseriges Material aufweisende Schicht (11) vorgesehen ist, welche relativ zu der Gebläseeinheit (2) vor der das poröse Material aufweisenden Schicht (12) angeordnet ist, wobei das faserige Material den Durchtritt von Schall ermöglicht, den Durchtritt von Fett und Feuchte jedoch zumindest behindert.An extractor hood (15) comprising a housing (16) with a suction area (17) for vapors and a blower unit (2) arranged in the housing, the suction side (3) of which is in fluid communication with the intake area (17), the blower unit (2 ) is at least partially surrounded by a sound barrier device (1) which comprises at least one layer comprising a perforated plate (6) and a layer (12) comprising a porous material for inhibiting the propagation of the operating noise of the blower unit (2),
characterized,
in that there is provided a fibrous material layer (11) disposed in front of the porous material layer (12) relative to the fan unit (2), said fibrous material permitting the passage of sound, the passage of grease and moisture but at least hampered. Dunstabzugshaube (15) nach dem vorhergehenden Anspruch,
dadurch gekennzeichnet,
dass der Gebläseeinheit (2) eine Rahmengestelleinheit (20) zugeordnet ist, und
dass die Schallbehinderungseinrichtung (1) wenigstens eine kassettenartige Schallbehinderungseinheit (4, 5) umfasst, wobei die kassettenartige Schallbehinderungseinheit in die Rahmengestelleinheit entnehmbar einsetzbar ist.Extractor hood (15) according to the preceding claim,
characterized,
that the fan unit (2) is associated with a frame frame unit (20), and
in that the sound-deadening device (1) comprises at least one cassette-type sound obstruction unit (4, 5), wherein the cassette-type sound obstruction unit can be removably inserted into the frame frame unit. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) sandwichartig aufgebaut ist und insbesondere wenigstens eine weitere Schicht (7, 13, 14, 8) umfasst.Extractor hood (15) according to one of the preceding claims,
characterized,
in that the noise prevention device (1) is constructed in the manner of a sandwich and in particular comprises at least one further layer (7, 13, 14, 8). Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) Schallwellen mit tiefen Frequenzen, insbesondere im Bereich kleiner als 1200 Hz, und/oder Schallwellen mit hohen Frequenzen, insbesondere im Bereich größer als 1200 Hz, behindert und insbesondere zur breitbandigen Schallbehinderung ausgebildet ist.Extractor hood (15) according to one of the preceding claims,
characterized,
in that the noise prevention device (1) impedes sound waves with low frequencies, in particular in the range below 1200 Hz, and / or sound waves with high frequencies, in particular in the range greater than 1200 Hz, and in particular is designed for broadband noise limitation. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) als weitere Schicht eine schallharte Wand (8), insbesondere eine aus Vollblech gebildete Wand umfasst.Extractor hood (15) according to one of the preceding claims,
characterized,
that the sound obstruction device (1) as a further layer comprising a sound-reflecting wall (8), especially a wall formed from sheet metal. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) als weitere Schicht eine gespannte elastische Membran (13), insbesondere eine aus Folie, Gummi oder dünnem Blech gebildete elastische Membran (13), umfasst, wobei die Membran (13) an einem Rahmen oder an einer vorhergehenden oder nachfolgenden Schicht porösen Materials oder einer ein Lochblech (7) aufweisenden Schicht angebracht, insbesondere geklebt, ist.Extractor hood (15) according to one of the preceding claims,
characterized,
that the sound obstruction device (1) as a further layer a stretched elastic membrane, comprises (13), in particular a formed from foil, rubber or thin metal sheet elastic membrane (13), said membrane (13) on a frame or on a preceding or subsequent Layer of porous material or a perforated plate (7) having layer attached, in particular glued, is. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) als weitere Schicht eine Luftschicht (14) umfasst, welche insbesondere zwischen der eine elastische Membran (13) aufweisenden Schicht und der benachbarten Schicht angeordnet ist, welche ein Lochblech (7) oder eine schallharte Wand (8) aufweist, wobei die Luftschicht (14) insbesondere eine Dicke von 1/6 der Gesamtdicke aller Schichten der Schallbehinderungseinrichtung (1) besitzt.Extractor hood (15) according to one of the preceding claims,
characterized,
the sound-deadening device (1) comprises, as a further layer, an air layer (14) which is arranged in particular between the layer having an elastic membrane (13) and the adjacent layer which has a perforated plate (7) or a reverberant wall (8). wherein the air layer (14) in particular has a thickness of 1/6 of the total thickness of all layers of the sound barrier device (1). Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) zumindest eine Schicht, welche den Schall wenigstens teilweise dämpft und/oder absorbiert, und zumindest eine Schicht, welche den Schall wenigstens teilweise reflektiert, umfasst, wobei eine ein poröses Material (12) oder eine elastische Membran (13) aufweisende Schicht eine schalldämpfende bzw. schallabsorbierende Wirkung besitzt und eine ein Lochblech (6, 7) oder eine schallharte Wand (8) aufweisende Schicht eine schallreflektierende Wirkung besitzt.Extractor hood (15) according to one of the preceding claims,
characterized,
in that the sound-deadening device (1) comprises at least one layer which at least partially attenuates and / or absorbs the sound, and at least one layer which at least partially reflects the sound, one comprising a porous material (12) or an elastic membrane (13). has a sound-absorbing or sound-absorbing effect and has a perforated plate (6, 7) or a reverberant wall (8) layer having a sound-reflecting effect. Dunstabzugshaube (15) dem vorhergehenden Anspruch,
dadurch gekennzeichnet,
dass zwischen einer den Schall wenigstens teilweise reflektierenden Schicht und einer weiteren den Schall wenigstens teilweise reflektierenden Schicht wenigstens eine den Schall wenigstens teilweise dämpfende bzw. absorbierende Schichte angeordnet ist.Extractor hood (15) according to the preceding claim,
characterized,
in that at least one layer which at least partially attenuates or absorbs the sound is arranged between a layer which at least partially reflects the sound and a further layer which at least partially reflects the sound. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass das poröse Material (12) ein Schaumstoff, insbesondere Basotect-Schaumstoff oder Melamin-Schaumstoff, oder Steinwolle ist.Extractor hood (15) according to one of the preceding claims,
characterized,
in that the porous material (12) is a foam, in particular Basotect foam or melamine foam, or rock wool. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche 5 bis 10,
dadurch gekennzeichnet,
dass die schallharte Wand (8) von einer Wand des Gehäuses der Dunstabzugshaube gebildet ist.Extractor hood (15) according to one of the preceding claims 5 to 10,
characterized,
that the reverberant wall (8) is formed by a wall of the housing of the extractor hood. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) wenigstens zwei ein Lochblech (6, 7) aufweisende Schichten umfasst, wobei bei der von diesen wenigstens zwei Schichten relativ zur Gebläseeinheit näher liegenden Schicht die freie Fläche der Lochungen des Lochblechs (6) insbesondere mindestens 60% der Gesamtfläche des Lochblechs beträgt und größer ist als die freie Fläche der Lochungen des Lochblechs (7) der wenigstens einen weiteren Schicht dieser wenigstens zwei Schichten, bei dem die freie Fläche der Lochungen insbesondere mindestens 40% der Gesamtfläche des Lochblechs beträgt.Extractor hood (15) according to one of the preceding claims,
characterized,
that the sound inhibiting means (1) at least two, a perforated plate (6, 7) having layers, wherein at the nearer of these at least two layers relative to the blower unit layer, the free surface of the perforations in the perforated plate (6), in particular at least 60% of the total area of the Perforated sheet is greater than the free area of the perforations of the perforated plate (7) of at least one further layer of these at least two layers, in which the free area of the perforations is in particular at least 40% of the total area of the perforated plate. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) wenigstens zwei ein poröses Material (12) aufweisende Schichten umfasst, wobei die von diesen wenigstens zwei Schichten (12) relativ zur Gebläseeinheit (2) näher liegende Schicht ein Material mit größerem Porendurchmesser bzw. geringerer Dichte aufweist als das poröse Material der wenigstens einen weiteren Schicht dieser wenigstens zwei Schichten.Extractor hood (15) according to one of the preceding claims,
characterized,
that the sound inhibiting means (1) at least two, a porous material (12) having layers, wherein the of these at least two layers (12) relative to the blower unit (2) nearer layer comprises a material with a larger pore diameter and less dense than the porous Material of the at least one further layer of these at least two layers. Dunstabzugshaube (15) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Schallbehinderungseinrichtung (1) wenigstens zwei eine elastische Membran (13) aufweisende Schichten umfasst, wobei bei der von diesen wenigstens zwei Schichten relativ zur Gebläseeinheit (2) näher liegenden Schicht die elastische Membran dünner ist als die elastische Membran der wenigstens einen weiteren Schicht dieser wenigstens zwei Schichten.Extractor hood (15) according to one of the preceding claims,
characterized,
in that the sound-inhibiting device (1) comprises at least two layers comprising an elastic membrane (13), wherein the elastic membrane is thinner than the elastic membrane of the at least one further layer thereof in the layer closer to these at least two layers relative to the blower unit (2) at least two layers. Schallbehinderungseinrichtung (1) für eine geräuschreduzierte Dunstabzugshaube nach wenigstens einem der kennzeichnenden Teile der Ansprüche 1 bis 14.Noise control device (1) for a noise-reduced extractor hood according to at least one of the characterizing parts of claims 1 to 14.
EP13401137.8A 2013-01-11 2013-12-16 Extractor hood Active EP2754967B1 (en)

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DE102015213471A1 (en) * 2015-07-17 2017-01-19 Wilhelm Bruckbauer Lüfterbaustein
IT201600102040A1 (en) * 2016-10-11 2018-04-11 Elica Spa Extraction hood for cooking fumes.
CN108240648A (en) * 2017-10-31 2018-07-03 宁波方太厨具有限公司 A kind of frequency conversion noise reduction outlet housing of range hood
CN108731072A (en) * 2018-07-14 2018-11-02 佛山市云米电器科技有限公司 A kind of kitchen ventilator with the cellular noise filtering device of multilayer
CN109373396A (en) * 2018-11-27 2019-02-22 佛山市云米电器科技有限公司 A kind of kitchen ventilator with noise interference device
CN112097299A (en) * 2020-10-13 2020-12-18 杭州老板电器股份有限公司 Oil seepage prevention and noise reduction assembly and range hood
US12079062B2 (en) 2022-10-21 2024-09-03 Quanta Computer Inc. Method and system for providing power saving in computer systems

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DE102015100564B4 (en) * 2015-01-15 2021-07-22 Miele & Cie. Kg Extractor hood
DE102015101039A1 (en) * 2015-01-26 2016-07-28 Miele & Cie. Kg Hood
CN107166458A (en) * 2017-04-24 2017-09-15 杭州老板电器股份有限公司 A kind of lampblack absorber of active active noise reduction
CN108954436A (en) * 2018-07-14 2018-12-07 佛山市云米电器科技有限公司 A kind of kitchen ventilator with the cellular noise filtering device of multi-frequency
CN108954431A (en) * 2018-07-14 2018-12-07 佛山市云米电器科技有限公司 A kind of band can reduce the kitchen ventilator of the cellular noise filtering device of specific unifrequency
CN108954432A (en) * 2018-07-14 2018-12-07 佛山市云米电器科技有限公司 A kind of kitchen ventilator having multi-frequency noise filtering device

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DE102015213471A1 (en) * 2015-07-17 2017-01-19 Wilhelm Bruckbauer Lüfterbaustein
DE102015213471B4 (en) 2015-07-17 2021-11-11 Wilhelm Bruckbauer Fan module
IT201600102040A1 (en) * 2016-10-11 2018-04-11 Elica Spa Extraction hood for cooking fumes.
WO2018069813A1 (en) * 2016-10-11 2018-04-19 Elica S.P.A. Hood for the suction of cooking fumes
EA035806B1 (en) * 2016-10-11 2020-08-13 Элика С.П.А. Hood for the suction of cooking fumes
CN108240648A (en) * 2017-10-31 2018-07-03 宁波方太厨具有限公司 A kind of frequency conversion noise reduction outlet housing of range hood
CN108240648B (en) * 2017-10-31 2023-11-17 宁波方太厨具有限公司 Variable-frequency noise-reduction air outlet cover of range hood
CN108731072A (en) * 2018-07-14 2018-11-02 佛山市云米电器科技有限公司 A kind of kitchen ventilator with the cellular noise filtering device of multilayer
CN109373396A (en) * 2018-11-27 2019-02-22 佛山市云米电器科技有限公司 A kind of kitchen ventilator with noise interference device
CN112097299A (en) * 2020-10-13 2020-12-18 杭州老板电器股份有限公司 Oil seepage prevention and noise reduction assembly and range hood
US12079062B2 (en) 2022-10-21 2024-09-03 Quanta Computer Inc. Method and system for providing power saving in computer systems

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EP2754967B1 (en) 2020-03-11
EP3260782A1 (en) 2017-12-27
ES2781870T3 (en) 2020-09-08
EP3260782B1 (en) 2019-02-27

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