EP2484981B1 - Appareil d'aspiration - Google Patents

Appareil d'aspiration Download PDF

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Publication number
EP2484981B1
EP2484981B1 EP12154391.2A EP12154391A EP2484981B1 EP 2484981 B1 EP2484981 B1 EP 2484981B1 EP 12154391 A EP12154391 A EP 12154391A EP 2484981 B1 EP2484981 B1 EP 2484981B1
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EP
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Prior art keywords
suction
inlet aperture
stream
soundproofing
noise
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EP12154391.2A
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German (de)
English (en)
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EP2484981A1 (fr
Inventor
Danilo Poser
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FALMEC SpA
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FALMEC SpA
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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 present invention concerns a suction apparatus, for use in a domestic environment, for example a kitchen, or in a restaurant business or suchlike, which is not only configured for an efficacious suction of the fumes but also has great capacity for noise abatement.
  • Suction apparatuses for domestic or professional use comprise means to take in air or fumes from a first environment toward a second environment.
  • the suction means are driven by an electric motor connected to a fan to take in the fumes, which can be made to rotate at different speeds and typically produces a noise emission which, for reasons of environmental comfort, it is preferable to abate, completely or at least partly, by using suitable insulating and/or soundproofing materials. Moreover, in this perspective, it is also preferable to reduce, if not abate, the noise produced by vortexes and turbulence generated by the stream of air taken inside the suction body. Although a reduction in the noise is achieved, it is never completely eliminated. Therefore, when the suction body is working, the user can be exposed to a noise which, even if it is of low intensity, is continuous and can be, over a period, annoying.
  • the silencer in US'776 is configured as a reduction unit both to carry out a passive reduction of the noise, for example being made of or lined with soundproofing material such as polyester or melamine, which reduces frequencies above 1,000 Hz, and also to carry out an active reduction of the noise which reduces frequencies below 1,000 Hz, using microphones and loudspeakers which generate an opposite phase noise with an equal amplitude to the noise emanating through the silencer thereof, in order to dampen it.
  • a passive reduction of the noise for example being made of or lined with soundproofing material such as polyester or melamine, which reduces frequencies above 1,000 Hz, and also to carry out an active reduction of the noise which reduces frequencies below 1,000 Hz, using microphones and loudspeakers which generate an opposite phase noise with an equal amplitude to the noise emanating through the silencer thereof, in order to dampen it.
  • the containing body of the motor which can be made of a material which has an acoustic insulation capacity, such as polyester or melamine, can comprise a lining in a similar soundproofing material which is applied and disposed on the internal walls in proximity to the lower inlet aperture provided in the containing body and through which the air is taken in.
  • the lower inlet aperture is shaped with straight and squared walls and edges, with very little or no aerodynamic capacity.
  • an active second noise reduction unit similar to the one provided on the silencer, is mounted under the motor, facing toward the lower inlet aperture and used to reduce the low frequency noise generated by the air turbulence and in its turn lined by applied soundproofing lining.
  • a suction pipe of a box-like shape comprises internally shaped and perforated walls, associated with linings of soundproofing material with a rockwool base.
  • a suction motor is mounted in the box-like suction pipe, inside another central body which has lateral apertures and a lower chamber through which the air coming from the lower inlet aperture is taken in.
  • a soundproofing device of a prism shape, with a triangular base and made from other shaped and perforated walls, is installed transversely, associated with linings of soundproofing material with a rockwool base.
  • WO'080 also has high production costs, due also to the need to assemble the various components which carry out the soundproofing function.
  • the presence of the suction chamber in the central body in WO'080 not only defines a complex and tortuous path of the air taken in but also distances the motor too much from the soundproofing device mounted on the lower external wall of the central body and defines a resonance box which amplifies the noise of the motor and of the stream of turbulent air.
  • the prior art document DE 20 2007 017 089 U1 describes a sound damping device placed inside a ventilation duct.
  • Purpose of the present invention is to achieve a suction apparatus, typically for domestic use but not excluding professional use, which allows to reduce the noise emissions considerably, produced both by the suction motor and by the air stream taken in, at the same time maintaining a high suction efficiency.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a suction apparatus can be used in domestic environments, in a kitchen for example, or in restaurant activities or suchlike, and comprises a suction body, provided with an inlet aperture to take in a stream of air and/or fumes from a first environment and a discharge outlet to discharge the stream taken in to a second environment.
  • the apparatus of the present invention also comprises air and/or fumes suction means and soundproofing means, suitable to reduce or eliminate the noise produced by the suction means and/or by the stream taken in.
  • the soundproofing means comprise a soundproofing body made completely as a monoblock of soundproofing material, which houses inside itself the suction means and, in substantial correspondence with the inlet aperture, has one or more means to separate and divert the stream into a plurality of sub-streams directed toward at least the peripheral walls of the soundproofing body.
  • the transverse extension of the one or more separation and diversion means is slightly bigger than the transverse extension of the inlet aperture, the peripheral edges of the one or more separation and diversion means, in cooperation with the peripheral edges of the inlet aperture, functioning as a whole as a screen against the noise emission with respect to the inlet aperture, so that there is no direct communication at least between the source of noise of the suction means and the environment outside the inlet aperture.
  • the present invention allows a considerable abatement of the noise, without, however, having to resort to costly and complex active noise abatement devices.
  • the present invention allows reduced assembly costs, together with a high quality and repeatability of soundproofing in production because, by making the soundproofing body as a monoblock, or as a single body without substantial interruption of material between the parts which constitute it, including also the one or more means to separate and divert the stream, one avoids the manual assembly steps of the various components which perform the soundproofing function, which in themselves are not without uncertainties and possible errors or inaccuracies.
  • the present invention preliminarily developing the shape, possibly by means of simulation and modeling using an electronic processor, and suitably sizing the soundproofing body consisting of a monoblock, the repeatability and correct positioning of the means which perform the soundproofing function are guaranteed.
  • the soundproofing body is shaped to define a first external part that extends between the inlet aperture and the discharge outlet, and a second part inside the first part, disposed in substantial correspondence with the inlet aperture.
  • the first external part comprises peripheral walls that delimit inside them a suction chamber.
  • the suction chamber in turn is formed by a first section, in proximity to the inlet aperture, and a second section, downstream of the first section in a main direction of travel of the stream of air and fumes, and upstream of the discharge outlet, in which the suction means are housed.
  • the second internal part is provided inside the first section, immediately downstream of the inlet aperture and is shaped to act as means to separate and divert the main stream entering through the inlet aperture in internal suction sub-streams.
  • the second internal part which acts as a separation and diversion mean cooperates with the peripheral walls of the first part so as to define passage channels, diverging toward the outside with respect to the main direction of travel of the stream.
  • the passage channels are configured to selectively receive the suction sub-streams and to convey them at least toward the soundproofing material that forms the peripheral walls, so as to reduce and/or eliminate the noise emissions of the suction body.
  • the peripheral walls in proximity to the inlet aperture the peripheral walls comprise convex regions which define a gradual and desired narrowing in section thereof, suitable to channel the stream of air and/or fumes toward the second internal part which functions as a separation and diversion mean, immediately downstream of the inlet aperture.
  • the curve defined by the convexity of the inlet walls is advantageously suitable to prevent the generation of turbulence and vortexes in the stream, reducing the noise emissions.
  • the second internal part which functions as a separation and diversion mean is substantially shaped like a prism with its axis transverse to the direction of flow of the stream taken in, having an edge facing toward the inlet aperture defined by associated converging walls that determine the separation and diversion of the stream taken in into sub-streams.
  • the separation and diversion mean extends longitudinally between two opposite peripheral walls of the first external part of the soundproofing body defining, in the suction chamber, at least a first passage channel, configured to selectively receive a first sub-stream, and a second passage channel, configured to selectively receive a second sub-stream.
  • the two channels thus defined have all the walls made of soundproofing material, and are therefore suitable to absorb the noise of the channeled streams.
  • the first passage channel and the second passage channel are inclined with respect to the main direction of the stream by an angle comprised between about 20° and about 40°, preferably between about 25° and about 35°.
  • each of the passage channels has a cross section that progressively reduces in the direction of travel of the stream taken in, from the inlet aperture toward the discharge outlet, that is, larger in size near the inlet aperture and smaller toward the second section of the suction chamber.
  • the convex regions of the peripheral walls delimit a maximum narrowing in section of the suction chamber in proximity with the inlet aperture and substantially flush with the edge of the separation and diversion mean of the stream taken in.
  • the reciprocal disposition of the second internal part, that functions as a separation and diversion mean of the stream, and of the peripheral walls that delimit the inlet aperture determines a complete screening effect of the noise emissions, particularly the noise generated from inside the suction body, so that there is no direct sound communication between the suction means and the inlet aperture. Therefore, any noise emission emitted by the suction means cannot exit from the inlet aperture without being intercepted by the soundproofing material, hence without being at least partly attenuated by it.
  • the transverse extension of the separation and diversion mean of the stream is slightly greater than the transverse extension of the inlet aperture, so that there is no direct communication at least between the source of the noise of the suction means and the inlet aperture, so that the noise emission is intercepted by the soundproofing material.
  • the lateral wall facing toward the suction means is slightly longer than the inlet aperture, and is aligned with the latter with respect to the main direction of the stream, so as to obtain the desired masking effect of the noise.
  • the suction means cooperating with the peripheral walls, define a second segment of each of the passage channels that develops inside the second section of the suction chamber.
  • the second segment of each of the passage channels extends in a direction substantially parallel to the main direction of travel of the stream in the suction body.
  • the soundproofing material which makes up the shaped monoblock is based on flexible expanded polyurethane agglomerate, in some variants with a density comprised between about 100 g/dm 3 and 200 g/dm 3 , preferably between about 160 g/dm 3 and 180 g/dm 3 .
  • the latter is a material with good soundproofing qualities and suitable to achieve a self-bearing structure which can support its own weight without deforming or breaking.
  • the suction apparatus also comprises a discharge pipe for the stream taken in and an elbow connection, made of the same material that forms the soundproofing body and also advantageously made as a monoblock of soundproofing material.
  • the present invention also concerns a method to take in a stream of air and/or fumes using a suction apparatus having a suction body, provided with an inlet aperture to take in the stream of air and/or fumes from a first environment, a discharge outlet to discharge the stream taken in toward a second environment, means to take in the air and/or fumes and soundproofing means suitable to reduce or eliminate the noise produced at least by the suction means and/or the stream taken in.
  • the method comprises at least a first step in which a stream of air is taken in by the suction body through the inlet aperture, a second step in which the stream is divided into a plurality of sub-streams, which are selectively directed, advantageously in passage channels of the suction body, toward desired soundproofing means, suitable to absorb the noise, and a third step in which the sub-streams, passing through the suction means, are emitted through the discharge outlet.
  • the method according to the present invention provides to prevent the direct communication at least between the source of the noise of the suction means and the inlet aperture using as a screen the transverse extension of the one or more separation and diversion means slightly bigger than the transverse extension of the inlet aperture.
  • a suction apparatus 10 comprises a suction body 11 connected to a discharge pipe 13 to discharge the fumes, which in turn is connected to an elbow connection 15, to take in the air and/or fumes from a first environment, for example a kitchen, to a second environment, for example outside the house.
  • the suction body 11 may be coupled, as needed, to various known types of extractor hoods, not shown here.
  • the suction apparatus 10 is for example suitable to be installed above a cooker or suchlike, to suck in and then remove the fumes and vapors produced, for example during cooking.
  • the suction body 11 comprises an external casing 20, for example made of metal such as zinc-plated sheet, and has an inlet aperture 19 to suck in a stream of air and/or fumes, and a discharge outlet 18, associated in this case with the discharge pipe 13.
  • the suction body 11 comprises inside itself an aspirator, also called conveyor 17 ( figs. 3 and 4 ), of a known type, housed in a corresponding suction chamber 30, fed by a suitable electric motor, not shown, and suitable to suck in the fumes from the inlet aperture 19, and to expel them to the discharge pipe 13.
  • an aspirator also called conveyor 17 ( figs. 3 and 4 )
  • conveyor 17 figs. 3 and 4
  • suitable electric motor not shown
  • the suction body 11 comprises a soundproofing body 12 formed by a monoblock of soundproofing material, advantageously made by molding.
  • the soundproofing material which makes up the shaped monoblock is based on flexible expanded polyurethane agglomerate, with a density comprised between about 100 g/dm 3 and 200 g/dm 3 , preferably between about 160 g/dm 3 and 180 g/dm 3 , which guarantees an optimum compromise between soundproofing capacity and self-bearing structural properties.
  • the structure of the open-cell material allows to disperse and absorb the sound waves in a wide range of frequencies. Furthermore, it is a material suitable for shaping by means of molding processes.
  • the discharge pipe 13 and the elbow connection 15 are also made with the same soundproofing material as above, and actively contribute to reducing the noise exiting from the suction body 11.
  • the elbow connection 15 has a section equal to that of the discharge pipe 13, and a curvature suitable to limit to the utmost the noisiness of the stream of air, at the same time reducing load losses to a minimum.
  • the discharge pipe 13 and the elbow connection 15 may advantageously be rendered substantially impermeable, for example by applying a lining or covering that is not permeable to air, since the porosity of the soundproofing material of which they are made would make them permeable to the air expelled from the aspirator 17.
  • the soundproofing body 12 is shaped so as to define a first external part 12a ( fig. 5 ), which extends between the inlet aperture 19 and the discharge outlet 18, and a second part 12b, inside the first part 12a, disposed in substantial correspondence with the inlet aperture 19.
  • the first part 12a comprises peripheral walls 12c, 12d, in particular a pair of front peripheral walls 12c and a pair of lateral peripheral walls 12d, disposed mutually opposite, which delimit inside them the suction chamber 30 ( figs. 3, 4 and 5 ).
  • the suction chamber 30 is delimited at the upper part by an upper closing element or lid 14, advantageously made of the same soundproofing material as the soundproofing body 12, on which upper closing element 14 the discharge outlet 18 is made.
  • the upper closing element 14 has a through aperture 23 associated with the discharge outlet 18, which is shaped so as to house a terminal portion 25 of the discharge pipe 13.
  • the terminal portion 25 and the through aperture 23 are reciprocally mating to achieve a same-shape coupling.
  • the same-shape coupling substantially determines a reliable fluidic seal, as well as a resistant mechanical constraint, so that there is no passage or leakage of air and therefore no propagation of the noise. Consequently, the solution of attaching the discharge pipe 13 and the upper closing element 14 through same-shape coupling further contributes to limiting the noisiness of the suction apparatus 10 according to the present invention.
  • the main function of the upper closing element 14 is to separate the aspirator 17 mechanically from the external casing 20 in order to eliminate possible transmissions of vibrations between the latter, and also to function as an absorption for and a barrier against the propagation of the noise.
  • the aspirator 17 determines a stream of air F and/or fumes taken in from the inlet aperture 19 (at the bottom in fig. 5 ) to the discharge outlet 18 (at the top in fig. 5 ).
  • the suction chamber 30 has a first section 39 in substantial correspondence with the inlet aperture 19, and a second section 41 downstream of the first section 39 in a main direction X in which the stream F travels, which in this specific solution is also the axis of symmetry of the suction chamber 30, and upstream of the discharge outlet 18, in which a seating 37 is provided in which the aspirator 17 is housed.
  • the second part 12b is provided in the first section 39 and comprises a stream deflector 29, in a single piece with the remaining soundproofing body 12, which separates the main stream F entering through the inlet aperture 19 into sub-streams F1, F2 ( fig. 4 ).
  • the deflector 29, cooperating with the peripheral walls 12c, 12d of the first part 12a, defines passage channels 33, 35 diverging toward the outside, that is, toward the inlet aperture 19, and configured to selectively receive the sub-streams F1, F2 and to convey them at least toward the soundproofing material which forms the peripheral walls 12c, 12d, so as to reduce and/or eliminate the noise emissions of the suction body 11.
  • the stream deflector 29 made of soundproofing material is substantially shaped like a prism, in this case with a triangular base and disposed with its axis perpendicular to the direction X, extending between the walls of a desired pair of peripheral walls 12c or 12d, in this case between the walls of the pair of front peripheral walls 12c ( figs. 3, 4 and 5 ).
  • the deflector 29 has rounded or beveled edges to determine an optimum aerodynamic behavior and to promote the passage of the stream F taken in and to reduce the formation of vortexes and turbulence that would generate noise.
  • a lateral wall 28a, upper during normal use, of the prism which in this case, given as a non-restrictive example of the invention, forms the deflector 29, is disposed facing toward the discharge outlet 18, closely adjacent to the aspirator 17, although the minimum space necessary for components or protruding parts of the aspirator 17 is guaranteed, so as to intercept directly the noise emission of the above ( fig. 5 ).
  • One edge 26 of the prism in a position opposite the lateral wall 28a and defined by the remaining two lateral walls 28b, 28c, in normal use converging downward, faces toward the inlet aperture 19 of the suction body 11, and near the latter, to function as a separator of the stream F.
  • the length of the lateral wall 28a is slightly greater than the length of the inlet aperture 19, so that there is no direct sound communication between the source of the noise, represented by the aspirator 17, and the inlet aperture 19, thus reducing the overall noise.
  • the pair of lateral peripheral walls 12d, in proximity to the inlet aperture 19, has convex regions 31, advantageously rounded and beveled, to obtain an optimum aerodynamic behavior, with the purpose of reducing turbulence and vortexes; facing each other, they delimit the inlet aperture 19 and define a narrowing in the cross section of the suction chamber 30 in proximity with the inlet aperture 19 ( figs. 4 and 5 ), which promotes the channeling of the stream F toward the deflector 29.
  • the transverse extension of the deflector 29, in this case given as a non-restrictive example of the invention, with reference to the length or distance between the peripheral edges of the lateral wall 28a, is slightly greater than the cross section of the inlet aperture 19, defined substantially by the convex regions 31, so as to define all in all a physical screen against the noise coming from the aspirator 17 with respect to the environment outside the inlet aperture 19.
  • the peripheral edges of the lateral wall 28a of the deflector 29 cooperate, overlapping in height, with the convex regions 31 which delimit the peripheral edges of the inlet aperture 19, defining overall the desired screening effect.
  • the remaining segment of the lateral peripheral walls 12d above the convex regions 31 has a thickness that gradually diminishes until it is stabilized at a predefined value in the second section 41 of the suction chamber 30.
  • the lateral peripheral walls 12d identified above and the deflector 29 define a first passage channel 33 and a second passage channel 35 suitable to receive respectively the sub-streams F1 and F2 into which the main stream F has been divided at inlet ( fig. 4 ) by the deflector 29.
  • the channels 33 and 35 in proximity to the inlet aperture 19, have a first segment 33a, 35a which has a section that narrows as it proceeds in the direction of the sub-streams F1 and F2, diverging and inclined by an angle of about 30° with respect to the direction X.
  • the passage channels 33 and 35 have a second segment 33b, 35b, delimited externally by the peripheral walls 12c and 12d, and internally by the aspirator 17, which have a substantially vertical development and parallel to direction X ( figs. 4 and 5 ).
  • the aspirator 17, of a known type is installed in the seating 37 ( figs. 3, 4 and 5 ) and comprises two suction apertures for the air to enter; they are positioned vertically and respectively face toward the first passage channel 33 and the second passage channel 35.
  • the sub-streams F1 and F2 of the air and/or fumes in the passage channels 33 and 35 are sucked in by the aspirator 17 and are then thrust inside the discharge pipe 13 through the discharge outlet 18 located in the upper part of the aspirator 17 ( figs. 3 and 4 ).
  • the aspirator 17 is mounted above the deflector 29 ( fig. 4 ) in great proximity to the lateral wall 28a, upper during use, of the deflector 29.
  • the noise emitted from the lower part of the aspirator 17 is intercepted and reduced immediately by the lateral soundproofing wall 28a, and moreover, the reduced distance in the reciprocal positioning prevents phenomena of amplification and reverberation of the noise.
  • the air is sucked in laterally by the aspirator 17, following the shortest and most direct route, after it has passed through the passage channels 33, 35, preventing the formation of tortuous paths of the air taken in, and hence the formation of unwanted turbulence and noisiness.
  • the separation and diversion means can be formed by two or more separation and diversion elements, shaped with different geometric forms according to needs, for example as an upturned prism, beveled, rounded at the edges, upturned wedge, or other, so as to define the separation of the stream into more than two sub-streams, for example three, four or more sub-streams, which are directed toward respective channels defined by the separation and diversion elements themselves, suitably distanced and reciprocally positioned.
  • the present invention therefore provides to direct the plurality of sub-streams in a desired manner toward the soundproofing walls, in order to reduce noise.
  • Applicant has carried out experiments to compare the noise emissions, with the same functioning conditions, of the suction apparatus 10 according to the present invention and a known suction apparatus without means for reducing noise.
  • the measurements were carried out according to the international standard CEI IEC 60704-2-13:2000.
  • the suction motor of the suction apparatuses 10 used in the experiments had a nominal suction capacity of 800 m 3 /hr.
  • the suction apparatus 10 according to the present invention showed, in percentage terms, an average advantage in reducing noise intensity comprised between 20% and 30% compared with the apparatus that did not have the noise reduction means.
  • Applicant also carried out experiments to compare noise emissions, where possible with the same functioning conditions, of the suction apparatus 10 according to the present invention using sample B, with two known suction apparatuses (samples C and D) and available on the market, comprising noise reduction means according to the state of the art, where possible comparing homogeneous or comparable IEC flow rates of air taken in (m 3 /hr) and similar or comparable powers of the corresponding suction motors.
  • Table 1 shows the experimental data relating to the tests carried out with sample A.
  • the Table shows sound power values (noise), pressure and flow rate of the air taken in, with the corresponding measurement units.
  • Table 1 Speed 4 Speed 3 Speed 2 Speed 1 Sound power (dbA) 53.3 45.2 40.1 34.2 Pressure (Pa) 520 410 310 190 IEC Flow rate (m 3 /hr) 690 490 345 220
  • Table 2 shows the experimental data relating to the tests carried out with sample B, compared with the data obtained for samples C and D.
  • the Table shows sound power values (noise), pressure and flow rate of the air taken in, with the corresponding measurement units. Where the flow rate data were not homogeneous for the purposes of the comparison, the Table indicates the difference in the corresponding value of sample B according to the present invention with respect to samples C and D.
  • sample B of the present invention In the comparison with sample C, an obvious reduction in noise can be seen for sample B of the present invention by 9.5% at speed 3, and 3.2% at speed 4, also taking into account that sample B had a greater flow rate by respectively 20 m3/hr and 30 m 3 /hr compared with the flow rate value seen for sample C at speeds 3 and 4. It is therefore reasonable to expect that, given the same flow rate, the reduction obtainable with sample B will be even greater compared with sample C.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Telephone Function (AREA)
  • Duct Arrangements (AREA)

Claims (18)

  1. Appareil d'aspiration comprenant un corps d'aspiration (11) doté d'une ouverture d'admission (19) pour prélever un flux (F) d'air et/ou d'émanations dans un premier environnement, un orifice de refoulement (18) pour le flux (F) prélevé, dans un second environnement, des moyens d'aspiration (17) pour prélever l'air et/ou les émanations, une chambre d'aspiration (30) logeant lesdits moyens d'aspiration (17) et délimitée par un moyen d'insonorisation capable de réduire ou éliminer le bruit produit au moins par les moyens d'aspiration (17) et/ou le flux (F) prélevé, dans lequel ledit moyen d'insonorisation comprend un corps d'insonorisation (12) qui loge en son intérieur les moyens d'aspiration (17), ledit corps d'insonorisation (12) comprenant une première partie externe (12a) s'étendant entre l'ouverture d'admission (19) et l'orifice de refoulement (18), ladite première partie externe (12a) comprenant des parois périphériques (12c, 12d) délimitant en leur intérieur la chambre d'aspiration (30), et une seconde partie (12b), à l'intérieur de la première partie (12a), disposée sensiblement en correspondance avec l'ouverture d'admission (19), et comprenant un ou plusieurs moyens (29) pour séparer et dévier le flux (F) vers au moins les parois périphériques (12c, 12d) de la première partie externe (12a), caractérisé en ce que le corps d'insonorisation (12) est réalisé en un seul bloc en matériau d'insonorisation et l'extension transversale desdits un ou plusieurs moyens de séparation et de déviation (29) est légèrement plus grande que l'extension transversale de l'ouverture d'admission (19), les bords périphériques desdits un ou plusieurs moyens de séparation et de déviation (29), en coopération avec les bords périphériques de ladite ouverture d'admission (19), servant globalement d'écran contre l'émission de bruit par rapport à ladite ouverture d'admission (19), de façon à ce qu'il n'y ait pas de communication directe au moins entre la source du bruit desdits moyens d'aspiration (17) et l'environnement à l'extérieur de ladite ouverture d'admission (19).
  2. Appareil selon la revendication 1, caractérisé en ce que les moyens d'aspiration (17) sont disposés au-dessus et à proximité immédiate desdits un ou plusieurs moyens de séparation et de déviation (29) par rapport à la direction du flux (F) prélevé.
  3. Appareil selon la revendication 1 ou 2, caractérisé en ce que la chambre d'aspiration (30) est composée d'une première section (39) sensiblement en correspondance avec l'ouverture d'admission (19), et d'une seconde section (41) en aval de la première section (39) et en amont de l'orifice d'évacuation (18), par rapport à une direction principale (X) dans laquelle ledit flux (F) circule dans le corps d'aspiration (11), dans lequel ladite seconde partie (12b) est prévue à l'intérieur de ladite première section (39) immédiatement en aval de l'ouverture d'admission (19), fournissant là ledit moyen (29) pour séparer et dévier le flux (F) en une pluralité de sous-flux d'aspiration (F1, F2), ladite seconde partie (12b) coopérant avec les parois périphériques (12c, 12d) de la première partie (12a) de façon à définir des canaux de passage (33, 35) divergeant par rapport à la direction principale (X) de circulation dudit flux (F), les canaux de passage (33, 35) étant configurés pour recevoir sélectivement les sous-flux d'aspiration (F1, F2) et les acheminer au moins vers le matériau d'insonorisation qui forme lesdites parois périphériques (12c, 12d), de façon à réduire et/ou éliminer les émissions de bruit du corps d'aspiration (11).
  4. Appareil selon la revendication 3, caractérisé en ce que, à proximité de ladite ouverture d'admission (19), lesdites parois périphériques (12c, 12d) comprennent des régions convexes (31), facultativement façonnées arrondies ou biseautées, qui délimitent les bords périphériques de l'ouverture d'admission (10) et pouvant définir un rétrécissement progressif et souhaité de section de l'ouverture d'admission (19) afin de canaliser ledit flux (F) vers ledit moyen de séparation et de déviation (29) disposé immédiatement en aval de l'ouverture d'admission (19).
  5. Appareil selon la revendication 3 ou 4, caractérisé en ce que ladite seconde partie (12b) qui fonctionne comme un moyen de séparation et de déviation (29) a sensiblement une forme de prisme avec un axe transversal à la direction de circulation du flux (F) prélevé, ayant un bord (26) orienté vers l'ouverture d'admission (19) défini par des parois convergentes (28b, 28c) associées qui déterminent l'effet de séparation et de déviation du flux (F) en sous-flux (F1, F2).
  6. Appareil selon la revendication 5, caractérisé en ce que le moyen de séparation et de déviation sensiblement en forme de prisme (29) s'étend longitudinalement entre deux parois périphériques opposées (12c, 12d) de la première partie (12a) du corps d'insonorisation (12), définissant dans la chambre d'aspiration (30) au moins un premier canal de passage (33), configuré pour recevoir sélectivement un premier sous-flux (F1), et un second canal de passage (35), configuré pour recevoir sélectivement un second sous-flux (F2).
  7. Appareil selon la revendication 6, caractérisé en ce que ledit premier canal de passage (33) et ledit second canal de passage (35), dans un premier segment (33a, 35a) qui se développe dans la première section (39) de ladite chambre d'aspiration (30), sont inclinés par rapport à ladite direction (X) d'un angle compris entre environ 20° et environ 40°.
  8. Appareil selon l'une quelconque des revendications 3 à 7, caractérisé en ce que chacun desdits canaux de passage (33, 35) a une coupe transversale qui diminue progressivement dans la direction (X) de circulation du flux (F) prélevé, vers l'orifice de refoulement (18).
  9. Appareil selon la revendication 5, caractérisé en ce que lesdites régions convexes (31) desdites parois périphériques (12c, 12d) délimitent un rétrécissement maximal de section de la chambre d'aspiration (30) à proximité de l'ouverture d'admission (19) et sensiblement au droit dudit bord (26) du moyen de séparation et de déviation (29).
  10. Appareil selon l'une quelconque des revendications 3 à 9, caractérisé en ce que la disposition réciproque de la seconde partie (12b) qui fonctionne en tant que moyen de séparation et de déviation (29) et des parois périphériques (12c, 12d) qui délimitent l'ouverture d'admission (19), détermine un effet d'écran total des émissions de bruit desdits moyens d'aspiration (17).
  11. Appareil selon la revendication 5 ou 5 et 10, caractérisé en ce que, dans le moyen de séparation et de déviation en forme de prisme (29), la paroi latérale (28a) orientée vers les moyens d'aspiration (17) est légèrement plus longue que l'ouverture d'admission (19), et est alignée avec l'ouverture d'admission (19) par rapport à la direction (X).
  12. Appareil selon la revendication 7, caractérisé en ce que les moyens d'aspiration (17) définissent, en coopération avec les parois périphériques (12c, 12d), un second segment (33b, 35b) de chacun des canaux de passage (33, 35) qui se développe le long de la seconde section (41) de la chambre d'aspiration (30), s'étendant dans une direction sensiblement parallèle à ladite direction (X).
  13. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit matériau d'insonorisation est à base d'aggloméré de polyuréthane expansé flexible, facultativement doté d'une masse volumique comprise entre environ 100 g/dm3 et 200 g/dm3, de préférence environ 160 g/dm3 et 180 g/dm3.
  14. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend en outre un tuyau d'évacuation (13), réalisé en le même matériau qui forme ledit corps d'insonorisation (12) et également réalisé en un seul bloc qui s'étend depuis l'orifice d'évacuation (18).
  15. Appareil selon la revendication 14, caractérisé en ce qu'il comprend en outre un raccord coudé (15), avec sensiblement la même section que ledit tuyau d'évacuation (13), et raccordé au niveau de la partie supérieure à ce dernier, constitué du même matériau qui forme ledit corps d'insonorisation (12) et également réalisé en un seul bloc.
  16. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que la chambre d'aspiration (30) est délimitée au niveau de la partie supérieure par un élément de fermeture supérieur (14), sur lequel élément de fermeture supérieur (14) est réalisé l'orifice d'évacuation (18), dans lequel l'élément de fermeture supérieur (14) est réalisé en le même matériau d'insonorisation que le corps d'insonorisation (12), l'élément de fermeture supérieur (14) ayant une ouverture traversante (23) associée à l'orifice d'évacuation (18), qui est façonnée de façon à loger une portion terminale (25) du tuyau d'évacuation (13), dans lequel la portion terminale (25) et l'ouverture traversante (23) s'accouplent de façon réciproque pour parvenir à un couplage de même forme.
  17. Appareil selon la revendication 3, caractérisé en ce que les moyens d'aspiration (17) sont configurés pour aspirer latéralement l'air par deux ouvertures d'aspiration pour faire entrer l'air, positionnées verticalement et respectivement orientées vers un premier canal de passage (33) et un second canal de passage (35), le moyen d'aspiration (17) étant configuré pour pousser l'air aspiré à l'intérieur du tuyau d'évacuation (13) à travers l'orifice d'évacuation (18) situé dans la partie supérieure du moyen d'aspiration (17).
  18. Procédé de prélèvement d'un flux (F) d'air et/ou d'émanations faisant appel à un appareil d'aspiration ayant un corps d'aspiration (11), doté d'une ouverture d'admission (19) pour prélever un flux (F) d'air et/ou d'émanations dans un premier environnement, un orifice d'évacuation (18) pour le flux (F) prélevé, dans un second environnement, un moyen d'aspiration (17) pour prélever l'air et/ou les émanations, une chambre d'aspiration (30) logeant lesdits moyens d'aspiration (17) et délimitée par un moyen d'insonorisation pouvant réduire ou éliminer le bruit produit au moins par le moyen d'aspiration (17) et/ou le flux (F) prélevé, le procédé comprenant au moins une première étape dans laquelle un flux (F) d'air est prélevé par ledit corps d'aspiration (11) à travers ladite ouverture d'admission (19), dans lequel
    lesdits moyens d'insonorisation comprennent un corps d'insonorisation (12), qui loge en son intérieur le moyen d'aspiration (17), ledit corps d'insonorisation (12) comprenant une première partie externe (12a) s'étendant entre l'ouverture d'admission (19) et l'orifice d'évacuation (18), ladite première partie externe (12a) comprenant des parois périphériques (12c, 12d) délimitant en leur intérieur la chambre d'aspiration (30), et une seconde partie (12b), à l'intérieur de la première partie (12a), disposée sensiblement en correspondance avec l'ouverture d'admission (19), et comprenant un ou plusieurs moyens (29) pour séparer et dévier le flux (F) au moins vers les parois périphériques (12c, 12d) de la première partie externe (12a), le procédé comprenant également une deuxième étape dans laquelle ledit flux (F) est divisé, au moyen desdits un ou plusieurs moyens de séparation et de déviation (29), en une pluralité de sous-flux (F1, F2), qui sont orientés sélectivement vers un moyen d'insonorisation souhaité (12), adapté pour absorber le bruit, caractérisé en ce que le corps d'insonorisation (12) est constitué en un seul bloc d'un matériau d'insonorisation et par une troisième étape dans laquelle lesdits sous-flux (F1, F2), passant à travers ledit moyen d'aspiration (17), sont émis à travers ledit orifice d'évacuation (18), dans lequel il est prévu pour empêcher la communication directe au moins entre la source du bruit dudit moyen d'aspiration (17) et ladite ouverture d'admission (19) utilisant comme un écran l'extension transversale desdits un ou plusieurs moyens de séparation et de déviation (29) légèrement plus grande que l'extension transversale de l'ouverture d'admission (19).
EP12154391.2A 2011-02-08 2012-02-08 Appareil d'aspiration Active EP2484981B1 (fr)

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ITUD2011A000017A IT1404076B1 (it) 2011-02-08 2011-02-08 Apparecchiatura di aspirazione.

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EP2484981B1 true EP2484981B1 (fr) 2016-06-22

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ITTO20110350A1 (it) * 2011-04-20 2012-10-21 Indesit Co Spa Cappa per l'aspirazione e/o la filtrazione di fumi, in particolare per una cucina domestica
ES2700024T3 (es) * 2013-07-16 2019-02-13 Trox Gmbh Geb Componente de ventilación
CN103697512B (zh) * 2013-11-30 2016-08-24 宁波方太厨具有限公司 一种静音式吸油烟机
CN108019803B (zh) * 2017-11-27 2022-12-30 佛山市云米电器科技有限公司 一种具有卷吸效应的非平面式抽油烟机
IT201900000052A1 (it) * 2019-01-03 2020-07-03 Elica Spa Cappa per l'aspirazione di fumi di cottura comprendente un elemento divisorio per il condotto di aspirazione

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DE3401210A1 (de) * 1984-01-14 1985-07-25 ASEA AB, Västerås Schalldaempfer zum anschluss an einen stroemungskanal
SE507735C2 (sv) * 1996-11-01 1998-07-06 Electrolux Ab Köksventilator
US20040194776A1 (en) * 2003-04-03 2004-10-07 Silentium Ltd. Method for reducing noise of a cooking hood and a cooking hood based on such method
DE202007017089U1 (de) * 2006-12-22 2008-05-15 Wendt Sit Gmbh & Co.Kg Dämpfungsvorrichtung
FR2911520B1 (fr) * 2007-01-19 2009-08-28 Roblin Sas Soc Par Actions Sim Hotte aspirante pour cuisine
DE102009027170A1 (de) * 2009-06-24 2010-12-30 BSH Bosch und Siemens Hausgeräte GmbH Externes Gebläse für Dunstabzugsvorrichtung

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EP2484981A1 (fr) 2012-08-08
IT1404076B1 (it) 2013-11-08

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