EP3517011B1 - Dispositif filtrant destiné à la réduction du bruit pour un aspirateur - Google Patents

Dispositif filtrant destiné à la réduction du bruit pour un aspirateur Download PDF

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Publication number
EP3517011B1
EP3517011B1 EP19152483.4A EP19152483A EP3517011B1 EP 3517011 B1 EP3517011 B1 EP 3517011B1 EP 19152483 A EP19152483 A EP 19152483A EP 3517011 B1 EP3517011 B1 EP 3517011B1
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EP
European Patent Office
Prior art keywords
filter
area
filter assembly
air
region
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EP19152483.4A
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German (de)
English (en)
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EP3517011A1 (fr
Inventor
Benedikt Bach
Nicolas Seidel
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP3517011A1 publication Critical patent/EP3517011A1/fr
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12—Dry filters
    • A47L9/122—Dry filters flat
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping

Definitions

  • the present invention relates to a noise reducing filter assembly for a vacuum cleaner according to the preamble of claim 1 and a vacuum cleaner provided therewith according to claim 13.
  • vibrations can be generated and transmitted by different objects and/or by an air flow. Furthermore, vibrations can be reflected from surfaces. This phenomenon is called an echo, whereby an amplitude of the vibration and thus a volume of the vibration that can be perceived by humans can be reflected or amplified. Depending on the frequency and amplitude, the sound can be perceived by humans as a loud, unpleasant and annoying noise.
  • an air flow generated by a motor/fan unit is generated, which picks up dust and dirt and directs it into a housing containing the motor/fan unit, in which it is cleaned.
  • the dirt-enriched air is cleaned in the housing.
  • the cleaned air then flows through/around the motor/blower unit in order to cool it. Only in this way is a construction for current transportable devices possible.
  • airborne noise is produced - similar to the noise that occurs when the window is opened in a car at full speed.
  • Designers reduce airborne noise by removing obstacles such as sharp edges and slight bends in the airflow path.
  • the invention is essentially characterized in that an exhaust opening is covered in a vacuum cleaner housing by a protective cover, and that under the or A filter is arranged in the protective cover, through which the air emerging from the exhaust opening flows.
  • this filter layer is provided with a layer of air-impermeable material, preferably polyethylene, above the area of the exhaust opening. This layer may be provided on the bottom or top of the filter sheet or may be coplanar with the filter sheet.
  • the layer of air-impermeable material requires a smaller flow area for the exiting air, so that the vacuum cleaner has to be operated with a higher energy consumption, which in turn leads to an increase in the running noise of the motor-blower unit
  • the U.S. 3,882,961A discloses an air filtering, sound deadening muffler for a vacuum induction motor, the muffler including a muffler box and a multi-layered muffler filler.
  • the layers of the silencer filler consist of cross-linked polyurethane foam with different pore densities. Air is directed through the muffler from the least dense to the densest layer.
  • WO 2008/065 404 A2 discloses a filter assembly for a vacuum cleaner, comprising a vacuum cleaner filter assembly having a HEPA filter and a pre-filter for mounting in a vacuum cleaner chamber and being removably attached to the assembly by a pull tab.
  • a channel between the filters is configured to minimize dust contacting the line side of the HEPA filter when removing the pre-filter.
  • An intermediate filter in the line offers further protection of the HEPA filter during removal and cleaning of the pre-filter and provides sound absorption.
  • the invention is based on the object of providing a compact filter arrangement for a vacuum cleaner which enables improved noise reduction while at the same time maintaining or increasing its filter performance.
  • the filter arrangement for noise reduction for a vacuum cleaner has a flat design and comprises a first filter area of a filter and at least one additional filter area that differs from the first filter area, with the first filter area and the at least one additional filter area partially overlapping and/or adjoining one another at least partially adjoining one another, the filter areas forming a regular inflow area and a regular outflow area plane-parallel to the inflow area for air flowing through the filter arrangement, so that the first filter area and the at least one further filter area on the inflow area and/or on the outflow area are adjacent air-permeable Define sub-areas that are differ from each other by at least one predetermined property.
  • the filter arrangement can be optimally adapted to the needs of the user or to a noise to be dampened and/or a required cleaning and/or suction power by using a specific filter area or a material with a desired flow resistance and/or a sound-insulating effect of the air is selected for a specific partial area. Due to the flat design of the filter arrangement, a filter can be installed in a space-saving manner.
  • the special nature of the shape of a regular inflow surface or outflow surface does not offer any corners in its longitudinal extent, so that it offers little or no turbulence possibilities for an air flow. Furthermore, sound waves are not scattered in any direction.
  • the term "property of a filter area" of a filter arrangement or a filter is understood to mean a special feature or property of the filter or filter material that can be differentiated in terms of a material composition and production, a geometry, an electromechanical and chemical property and mode of action.
  • inflow surface or the outflow surface facing away from it means that surface through which the air flows corresponds to a surface area of the filter, with the surface area of the inflow area being equal to an area of the outflow area facing away from it within the meaning of the invention.
  • these filters which form a regular surface, are oriented essentially perpendicular to a flow direction of the air to be filtered according to the following embodiments.
  • the flow direction of the air always means the direction of the air flow from the higher to the relatively lower pressure.
  • This essentially means a direction from the inflow surface to an outflow surface facing away from the air flowing through the filter arrangement.
  • both the inflow area and the outflow area facing away from it are basically as large as the throughflow area of the filter. As a result, essentially the entire filter surface that can be flowed through is used.
  • a surface or surface extent has two extents or dimensions with its length and width and its shape is defined by an outline.
  • planarity or planicity refers to the spatial arrangement - i.e. in the three-dimensional space of points in one plane; the points are then plane - in mathematics: coplanar. Two flat surfaces that are parallel are called plane-parallel within the meaning of the invention.
  • Adjacent to one another is understood in the context of the invention to mean that two or more partial areas are partially arranged adjacent to one another in the same inflow area or outflow area and in this way form a composite flow area in the longitudinal extension of the filter area.
  • overlapping is understood to mean that two or more filter areas of the flow-through surface partially cover or overlap or overlap.
  • partially enclosing means adjoining and/or delimiting a filter area from at least one side of its surface, with complete enclosing an all-round delimitation or enveloping of its surface is understood.
  • a filter arrangement In conventional filter arrangements, flat filter layers are arranged one above the other in the manner of a sandwich, perpendicular to a flow direction. Such a filter arrangement thus has the same filter properties over the entire flow area.
  • a filter arrangement according to the invention has individual filter areas or partial areas whose filter properties differ from those of an adjacent filter area.
  • a filter can be put together in this way, which can have specific but different features depending on a filter area or the area extent of its partial area.
  • a filter or the filter surface of the filter arrangement can be composed of concentric rings that adjoin one another.
  • two rectangular filter areas for example, partially overlap one another.
  • a further aspect of the invention relates to a vacuum cleaner with at least one filter arrangement for noise reduction, the vacuum cleaner comprising: a dust separation unit which is designed to separate contaminants from an intake air flow; a motor-fan assembly configured to generate the airflow; and at least one opening, which is arranged before and/or after the motor-fan device and through which opening the air flow can be passed.
  • the filter arrangement is upstream and/or downstream of the motor/fan device of the vacuum cleaner in the flow direction of the air flow.
  • the sound emitted to the outside can be greatly reduced by means of the filter arrangement.
  • the filter arrangement according to the invention enables a significant noise reduction when used in a vacuum cleaner equipped with it, without restricting the suction and/or cleaning performance of the Having to put up with the vacuum cleaner.
  • the filter arrangement according to the invention is therefore particularly suitable for low-power vacuum cleaner devices in which the suction power is already greatly reduced due to the low power of the motor-blower device.
  • the user-friendliness of devices equipped with such a filter arrangement is improved, since noises due to the operation of the vacuum cleaner's motor-fan device and unpleasant noises caused by the air flowing in the vacuum cleaner are muffled or completely avoided will.
  • At least one property of a material of the respective filter area of the filter arrangement has a predetermined flow resistance.
  • the interaction between the air permeability of the filter arrangement and a so-called pressure difference, which is caused by the flow resistance of the filter, is important.
  • a relatively higher pressure builds up upstream of the filter assembly than downstream of the filter where the pressure is relatively lower.
  • a low pressure difference in connection with a high air permeability or a low flow resistance of the filter reduces the expenditure of energy that is necessary to convey a certain amount of air through the filter arrangement.
  • a flow field of the air flowing through and/or a sound distribution field are not homogeneous. This means that the pressure and flow rate of the air and the distribution of the sound are not the same everywhere or run evenly.
  • the energy efficiency of the filter or of a vacuum cleaner operated with it can be increased through a targeted selection of the material for a specific filter area depending on a desired flow resistance of the filter and at the same time permanent cost savings can be guaranteed when operating the vacuum cleaner with such a filter arrangement.
  • By adjusting the flow resistance when choosing the material a minimum volume flow of the air that is to be cleaned and thus a specific cleaning performance of the vacuum cleaner can be ensured.
  • At least one predetermined property of a material of the respective filter area is selected depending on a specific sound frequency to be absorbed or a sound frequency spectrum.
  • the filter arrangement can be optimally adapted to the needs of the user or to the sound to be dampened.
  • Certain soundproofing materials filter the polluted air and dampen or absorb different sound frequencies at the same time. This is particularly important for noise reduction at frequencies below 2000 kHz.
  • At least one predetermined property of the material of the respective filter area is selected as a function of a specific sound frequency to be reflected or a sound frequency spectrum.
  • the filter arrangement can act like a diffuser or reflector of sound waves.
  • the sound waves can be directed in this way and their amplitude and frequency can be determined so that they counteract structure-borne noise caused by the motor/blower unit by dampening or canceling it out.
  • At least one filter region of the filter is designed to be essentially soundproof. Soundproof means that no sound of a certain sound spectrum penetrates from one area to another.
  • a filter arrangement is particularly suitable for a filter that is downstream of a motor-fan unit and is arranged in front of an air outlet opening from the vacuum cleaner, since it reflects it again in the direction of the motor-fan unit shortly before the sound exits and the Sound does not escape or only indirectly to the outside.
  • an airtight and/or soundproof filter area is arranged in such a way that the speed of the air flow is slowed down again shortly before exiting the vacuum cleaner housing.
  • the first filter arrangement has a different thickness and/or extent than the at least one further filter arrangement.
  • the individual filter areas can also be specifically adapted to the flow field or the velocity field of the air impinging on the filter arrangement, with the aim of achieving a homogeneous flow field of the air after it has passed through the filter.
  • the first filter area expediently differs from the at least one further filter area with regard to its geometric shape.
  • a proportion of the area extent of the partial area and/or thickness of the first filter area is 5% to 95% of the proportion of the area extent of the partial area and/or the thickness of the at least one further filter area.
  • a portion of the areal extent and/or thickness of the first filter area is preferably 25% to 75% and particularly preferably 40% to 60% of the portion of the areal extent of the partial area and/or the thickness of the at least one further filter area.
  • the individual filter areas can accordingly be specially adapted to a specific flow field or velocity field of the air impinging on the filter arrangement be adjusted.
  • the filter areas can be circular, elliptical, rectangular, trapezoidal or ring-shaped.
  • the filter arrangement can also be part of a filter device that has the shape of a cuboid, truncated cone or cylinder—as occurs, for example, in vacuum cleaners with centrifugal separators.
  • the filter arrangement preferably has a thickness of 2 millimeters to 50 millimeters.
  • the thickness of the filter arrangement can be optimally adapted to the requirements of the user.
  • thin filters are made from so-called felt materials, while thicker filters are usually made from foam.
  • the filter materials in a filter arrangement can be formed from a single type of material or from different materials.
  • the first filter area has a different density than the at least one further filter area.
  • a higher density of a filter area causes at the same time an increase in the flow resistance through the filter area with higher density.
  • the density of the filter area is also dependent on the desired degree of air purification. In conjunction with a targeted selection of the thickness and density of the filter area, the flow field of the air hitting the filter arrangement can be influenced even more differentiated and better, so that turbulence can be minimized after passing through the filter arrangement, which also has a noise-reducing and energy-saving effect.
  • the flow resistance of individual filter areas of the filter arrangement is distributed/arranged according to an advantageous embodiment, so that the flow resistance is directly proportional to a distribution of the flow velocity in the flow field of the air flow, which corresponds to the flow area of the filter arrangement.
  • the first filter area can have a lower air permeability or a higher flow resistance than the at least one additional filter area and/or the first filter area can have a higher sound impedance than the at least one additional filter area or a higher degree of sound absorption or sound reflection.
  • An expedient embodiment of the filter arrangement has at least two different materials perpendicularly to the direction of the air flow flowing through it in an overlapping area of the first and the at least one further filter area.
  • the overlapping area can be arranged and selected depending on a desired flow resistance.
  • the overlapping area is advantageously arranged perpendicularly to the direction of the air flow flowing through it.
  • an overlapping of the two filter areas is advantageous because this avoids gaps when the two filter areas are connected, which would severely impair the function of the filter arrangement.
  • the filter arrangement can also be mechanically more heavily loaded for a short time, since the individual filter areas can move relative to one another in the overlapping area without the filter function being impaired as a result.
  • the filter arrangement has an air-permeable wall in a transition area between the first filter area and the at least one second filter area. This enables a precise separation of the filter areas of the filter arrangement. Furthermore, the air-permeable wall acts as reinforcement and/or stiffening of the filter arrangement. At the same time, the wall itself forms an air-permeable filter area, acting like a further filter area.
  • the air-permeable wall forms a frame around the material of a filter area.
  • the air-permeable wall forms a frame enclosing the filter material of the filter area and/or as a holder of the filter material is formed.
  • the filter arrangement comprises at least one sound-damping material from the group consisting of polyurethane, polyethylene, polystyrene, polypropylene and melamine, preferably foams of the material.
  • foams of the material are inexpensive to manufacture and process and have a long service life and usability due to their durability.
  • the materials of the filter are produced as fleece, woven and knitted fabrics or by foaming.
  • the vacuum cleaner expediently has a filter arrangement with at least one partial surface which is covered by a first. filter area and at least one further adjacent filter area, which differs from the first filter area, is defined on an inflow surface and/or on an outflow surface of the filter arrangement, the partial surface at least partially covering the opening at a predetermined distance from the opening. Only partial coverage of the area of the flow cross section of the air through the opening can be chosen if structural or acoustic conditions make this necessary.
  • the filter arrangement can also be arranged at an angle or offset relative to a position of the opening. Depending on the filter material selected, a large overlap of the opening allows particularly good sound insulation.
  • a denser filter material or a lower-power motor/fan unit can be selected than with small flow areas.
  • the size of the partial area of the filter arrangement in the vacuum cleaner is 50% or preferably 100% or particularly preferably 200% of the size of the opening.
  • a size of the partial area can in principle also be selected to be greater than 200% or smaller than 50% of the size of the opening.
  • the choice of the size of the sub-area can also be chosen depending on the predetermined distance of the filter arrangement from the opening.
  • the filter arrangement or the vacuum cleaner connected thereto the filter arrangement is at least partially elastically mounted in the vacuum cleaner according to an advantageous embodiment.
  • the filter arrangement is at least partially elastically mounted in the vacuum cleaner according to an advantageous embodiment.
  • the present embodiments of the invention which provide a combination of several filter areas of a filter with different properties, can achieve an efficient reduction in noise while at the same time maintaining or increasing the suction power of a vacuum cleaner equipped therewith.
  • user-friendliness and customer satisfaction are significantly increased.
  • the drawing shows an advantageous embodiment of a vacuum cleaner 100 with a filter assembly 10 mountable therein according to an advantageous embodiment.
  • the filter arrangement 10 is arranged in front of an opening 13 which leads from a dust separation unit 11 into a motor/fan unit 12 of the vacuum cleaner 100.
  • the filter arrangement 10 is mounted in a holder 14 of the vacuum cleaner 100 in front of the opening 13 .
  • the holder 14 for supporting the filter assembly 10 can be designed to be elastic so that it dampens sound waves that can be caused by vibrations in the filter assembly 10, the motor/fan unit 12 or the vacuum cleaner 100.
  • the filter assembly 10 shown in the embodiment of the vacuum cleaner 100 has a rectangular shape.
  • the filter arrangement can assume a circular, elliptical or any desired polygonal shape. Due to the flat design and the material used for the filter arrangement 10, it can be cut to any desired size according to a particular embodiment, so that it can be used flexibly in different vacuum cleaners 100 or in special openings 13 for conducting an air flow.
  • a conventional vacuum cleaner 100 for filter bags is shown, but the invention is not limited to this, but also includes bagless vacuum cleaners or vacuum cleaners which have a centrifugal separator.
  • the filter arrangement 10 can additionally or alternatively be arranged on further openings 13 through which air can flow or is directed, for example in an outlet area of the vacuum cleaner 100, which is located downstream of the motor/blower unit 12 in the direction of the air flow and through which the air or the sound can escape to the outside.
  • the filter arrangement 10 is preferably arranged perpendicular to a flow direction of the air.
  • the filter arrangement 10 according to a further preferred embodiment--not shown here--can be arranged at a predetermined angle to the direction of the air flowing towards the filter arrangement 10.
  • the sound can be guided in a specific direction and/or an air resistance can be influenced by the filter arrangement 10 .
  • properties of a flow field or a velocity field of the air impinging on the filter or the filter arrangement 10 can be influenced in a targeted manner.
  • noise emissions from the vacuum cleaner 100 equipped with the filter arrangement 10 can be determined on the basis of further properties of the Filter assembly 10 affect.
  • a filter arrangement 10 according to the invention with a plurality of filter regions 1, 2, 3, 4, 5 of the filter arrangement is shown in a plan view of an inflow surface 6 of the filter arrangement 10.
  • both the inflow surface 6 and the outflow surface 7 facing away from it are basically as large as a flow-through surface of the filter.
  • the inflow surface 6 of the filter arrangement 10 has an essentially rectangular shape. It comprises a first filter area 1 of a filter 1, which differs from a further filter area 2, 3, 4, 5, here a second filter area 2, by at least one predetermined property.
  • the first filter area 1 and the at least one further filter area 2, 3, 4, 5 define adjacent sub-areas on the inflow surface 6 and/or on the outflow surface 7, which, for example, have different properties in terms of sound insulation and/or flow resistance.
  • the filter areas 1 and 2 can differ in the type of their material composition, in terms of their physical and chemical properties, their shape and type of manufacture.
  • the properties of the individual filter areas 1, 2, 3, 4 and 5 are preferably chosen such that they have a a vacuum cleaner 100 or a specific flow and sound field of the air, so that the most energy-efficient and effective cleaning of the polluted air is possible and, additionally or alternatively, a sound emanating from the vacuum cleaner 100 or from the air flowing through the filter arrangement 10 is damped .
  • a first filter area 1 of the filter arrangement 10 is preferably arranged directly in front of or behind the opening 13 of the motor/fan unit 12 of the vacuum cleaner 100 .
  • the first filter area 1 of the filter arrangement 10 is designed to be more airtight and stiffer than the second filter area 2 of the filter arrangement 10.
  • the filter area 1 of the filter arrangement 10 is encompassed by the second filter area 2 . It is thus possible with the filter arrangement 10, for example, to specifically reflect and/or absorb the sound waves carried along in the air flow.
  • Particularly expedient embodiments of the filter arrangement 10 have sound-absorbing materials from the group consisting of polyurethane, polyethylene, polystyrene, polypropylene and melamine. The materials are preferably used as foams as foams.
  • the filter area 1 is delimited by a wall 8 in a transition area to the filter area 2 .
  • the wall 8 acts here as an independent frame for the filter area 1 and as the wall 8 itself represents an air-permeable filter area. This is particularly advantageous if only one filter area 1 or 2 of the filter arrangement 10 is to be specifically replaced. The reason for this can be, for example, uneven wear of the two filter areas 1, 2 of the filter arrangement 10.
  • the filter arrangement 10 can be flexibly adapted to changed noise emissions and sound waves from the vacuum cleaner 100 or the motor/blower unit 12 .
  • a partial area of the inflow surface 6 and/or on the outflow surface 7 can be specifically adapted, since the partial area has a predetermined selected property.
  • this size can also be selected as a function of the overall size of the filter arrangement 10 .
  • a size of the partial area of the filter arrangement 10 in the vacuum cleaner 100 is particularly preferably selected to be between 50% and 200% of a size of the opening 13 .
  • a size of the sub-area can in principle also be chosen to be larger than 200% or smaller than 50% of the size of the opening 13 .
  • the size of the partial area can also be selected as a function of the predetermined distance of the filter arrangement from the opening 13 .
  • the larger the distance between the filter arrangement 10 and the opening 13 is selected the larger the size of the partial area should be selected relative to the size of the area of the opening 13 .
  • In the present example according to 1 corresponds to the area of the opening 13 - not shown - approximately the circular sub-area, which is given by the first filter area 1.
  • a low power consumption of the vacuum cleaner 100 or a small installation space in the vacuum cleaner 100 requires that the distance between the opening 13 and the filter arrangement 10 turns out to be smaller. At the same time, a smaller distance also leads to higher flow-related noises, which can be suppressed or minimized by means of a targeted choice of the size of the sub-area. In general, distances between 5 mm and 20 mm are expediently selected.
  • FIG. 3 For further illustration, several exemplary embodiments 3a, 3b, 3c, 3d and 3e of an advantageous embodiment of the filter arrangement 10 and its filter areas 1, 2, 3, 4 and 5 are shown in a sectional view along an imaginary section line AA from/in 2 shown.
  • the filter assembly 10 from 3 shows further exemplary embodiments with the filter arrangement 10 from FIG 2 similar filter arrangement 10.
  • a first filter area 1 is not completely encompassed or surrounded by the further filter area 2, 3, as is the case in the exemplary embodiment of FIG 2 is shown.
  • the individual filter areas 1, 2, 3, 4 and 5 can correspond to different materials in the present exemplary embodiments 3a, 3b, 3c, 3d and 3e.
  • the exemplary embodiments 3a to 3e of the embodiment in 3 is that they have a regular flow area 6 in common.
  • the individual filter areas 1, 2, 3, 4 and 5 do not form stepped surfaces.
  • the filter areas 1, 2, 3, 4, 5 of the flow-through surface of the filter arrangement 10 are formed in such a way that they partially overlap one another and/or at least partially enclose one another.
  • the filter or the filter arrangement 10 can be optimally adapted to the needs of the user in terms of a sound to be dampened and/or a required cleaning and/or Suction power can be adjusted by selecting a material with a desired flow resistance and/or a required soundproofing effect of the air for at least one specific filter area 1, 2, 3, 4, 5 of the filter assembly.
  • the first exemplary embodiment 3a shows a particularly simple implementation of the filter arrangement 10 using only two filter areas 1, 2.
  • the two filter areas 1, 2 have different materials, for example, whose density and/or flow resistance and/or elasticity differ from one another.
  • the denser a material is, the higher its flow resistance and the higher its degree of reflection of sound waves.
  • the more elastic a material is, the more sound it can absorb.
  • the advantages applicable to the exemplary embodiment 3a also apply to the further exemplary embodiments 3b, 3c, 3d and 3e.
  • a further exemplary embodiment 3b shows a variant of exemplary embodiment 3a, in which the first filter area 1 can be almost completely surrounded by the second filter area 2.
  • FIG. The special arrangement can be understood in analogy to the theory of electricity in the area of the partial overlapping of the filter areas 1, 2 as a series connection or addition of specific properties.
  • the flow properties and sound properties of the air can be influenced in an even more targeted manner using a predetermined geometric shape and thickness of the second filter area 2 .
  • the fatter one certain filter area - here filter area 2 - is made of the same material in comparison to another filter area 2, the higher, for example, its sound-insulating effect and/or the higher the air flow resistance opposing an air flow pulling through the filter arrangement.
  • the exemplary embodiment 3b can be used particularly advantageously, the combination of the first filter area 1 with the second filter area 2 making up for the lack of thickness in a partial area of the second filter area 2 can compensate.
  • the individual exemplary embodiments 3a to 3e essentially have a constant thickness. Thickness is the distance from the inflow surface 6 to the outflow surface 7 that the air flowing through the filter arrangement covers.
  • the inflow area 6 and the outflow area 7 facing away from it are basically as large as the throughflow area of the air.
  • a proportion of the surface area of the partial surface and/or thickness of the first filter area 1 is between 5% and 95%, preferably between 25% and 75% and particularly preferably between 40% and 60% of the Proportion of the surface area of the partial surface and/or thickness of the at least one further filter area 2, 3, 4, 5 can be selected.
  • the exemplary embodiment 3c shows a further possibility of combining three filter areas 1, 2 and 3 in a further advantageous arrangement.
  • the first filter area 1 is embedded in the second filter area 2 .
  • This exemplary embodiment can be characterized as a variant of the exemplary embodiment that has been expanded by a filter area 3 2 be seen.
  • further filter areas 1, 3, 4, 5 are accommodated or integrated in the second filter area 2.
  • the individual further filter areas 1, 3, 4, 5 can be understood as concentric circles or rectangles etc. adjoining one another in parallel.
  • Such an arrangement of the filter areas 1, 3, 4, 5 can be advantageous for certain frequencies and/or sound patterns in combination with different flow resistances of the material of the filter areas 1, 3, 4, 5.
  • further filter areas 1, 3 and 2 are embedded in a second filter area 2 in the manner of a shell, like an onion in the filter area 2.
  • the thickness of the exemplary embodiments 3a to 3e of the filter arrangement 10 has been chosen to be qualitatively constant. It should be noted at this point that, for example, the thickness of an exhaust filter of a vacuum cleaner 100 can be up to 50 millimeters, while other filter combinations only have a thickness of 2 millimeters. Furthermore, the individual filter areas 1, 2, 3, 4, 5 can also be arranged at an angle to one another within an adjacent filter area 1, 2, 3, 4, 5.
  • the advantages of the respective exemplary embodiments can in part be transferred to one another and linked to one another.
  • the filter arrangement 10 can be optimally adapted to the needs of the user or to the noise to be dampened and/or a required cleaning and/or suction power
  • a material with a desired flow resistance of the air is selected.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)

Claims (15)

  1. Dispositif filtrant (10) destiné à la réduction du bruit pour un aspirateur (100) comprenant : une première zone de filtre (1) et au moins une zone de filtre supplémentaire (2, 3, 4, 5) qui se différencie de la première zone de filtre (1), dans lequel la première zone de filtre (1) et l'au moins une zone de filtre supplémentaire (2, 3, 4, 5) se chevauchent en étant partiellement contiguës l'une à l'autre et/ou s'entourent en étant partiellement contiguës l'une à l'autre, de sorte que les zones de filtre (1, 2, 3, 4, 5) constituent une surface d'entrée ordinaire (6) et une surface de sortie (7) parallèle en plan à la surface d'entrée (6) pour un air traversant le dispositif filtrant, caractérisé en ce que la première zone de filtre (1) et l'au moins une zone de filtre supplémentaire (2, 3, 4, 5) définissent sur la surface d'entrée (6) et/ou sur la surface de sortie (7) des surfaces partielles perméables à l'air voisines, qui se différencient l'une de l'autre selon au moins une propriété prédéterminée.
  2. Dispositif filtrant (10) selon la revendication 1, caractérisé en ce qu'au moins une propriété d'un matériau de la zone de filtre respective (1, 2, 3, 4, 5) du dispositif filtrant (10) présente une résistance à l'écoulement prédéterminée.
  3. Dispositif filtrant (10) selon la revendication 1 ou 2, caractérisée en ce qu'au moins une propriété prédéterminée d'un matériau de la zone de filtre respective (1, 2, 3, 4, 5) est sélectionnée en fonction d'une fréquence sonore à absorber déterminée ou d'un spectre de fréquences sonores.
  4. Dispositif filtrant (10) selon l'une des revendications précédentes, caractérisée en ce qu'au moins une propriété prédéterminée d'un matériau de la zone de filtre respective (1, 2, 3, 4, 5) est sélectionnée en fonction d'une fréquence sonore à réfléchir déterminée ou d'un spectre de fréquences sonores.
  5. Dispositif filtrant (10) selon l'une des revendications précédentes, caractérisé en ce que la première zone de filtre (1) présente une épaisseur et/ou une étendue de surface différente par rapport à l'au moins une zone de filtre supplémentaire (2, 3, 4, 5).
  6. Dispositif filtrant (10) selon la revendication 5, caractérisé en ce qu'une part de l'étendue de surface de la surface partielle et/ou l'épaisseur de la première zone de filtre (1) atteint 5 % à 95 % de la part de l'étendue de surface de la surface partielle et/ou de l'épaisseur de l'au moins une zone de filtre supplémentaire (2, 3, 4, 5).
  7. Dispositif filtrant (10) selon la revendication 5, caractérisé en ce que le dispositif filtrant (10) présente une épaisseur située entre 2 millimètres et 50 millimètres.
  8. Dispositif filtrant (10) selon l'une des revendications précédentes, caractérisé en ce que la première zone de filtre (1) présente une densité différente par rapport à l'au moins une zone de filtre supplémentaire (2, 3, 4, 5).
  9. Dispositif filtrant (10) selon l'une des revendications précédentes, caractérisé en ce que le dispositif filtrant (10) présente au moins deux matériaux différents dans une zone de chevauchement de la première zone de filtre (1) et de l'au moins une zone de filtre supplémentaire (2, 3, 4, 5).
  10. Dispositif filtrant (10) selon l'une des revendications précédentes, caractérisé en ce que le dispositif filtrant (10) présente une paroi perméable à l'air (8) dans une zone de transition de la première zone de filtre (1) et de l'au moins une deuxième zone de filtre (2).
  11. Dispositif filtrant (10) selon la revendication 10, caractérisé en ce que la paroi perméable à l'air (8) constitue un cadre autour du matériau d'une zone de filtre (1, 2, 3, 4, 5).
  12. Dispositif filtrant (10) selon l'une des revendications précédentes, caractérisé en ce que l'au moins une zone de filtre (1, 2, 3, 4, 5) comprend au moins un matériau amortissant le bruit issu du groupe composé par le polyuréthane, le polyéthylène, le polystyrène, le polypropylène et la mélamine, de préférence leurs mousses.
  13. Aspirateur (100) avec au moins un dispositif filtrant (10) destiné à la réduction du bruit selon l'une des revendications précédentes 1 à 12, dans lequel l'aspirateur (100) comprend : une unité de séparation de poussière (11) conçue afin de séparer les impuretés d'un flux d'air aspiré ; un dispositif moteur-ventilateur (12) conçu afin de générer le flux d'air ; et au moins un orifice (13), disposé avant et après le dispositif moteur-ventilateur (12) et à travers lequel orifice (13) le flux d'air peut être mené, caractérisé en ce que le dispositif filtrant (10) est situé en amont et/ou en aval de l'au moins un orifice (13) du dispositif moteur-ventilateur (12) dans un sens d'écoulement du flux d'air.
  14. Aspirateur (100) selon la revendication 13, caractérisé en ce que le dispositif filtrant (10) présente au moins une surface partielle qui se différencie d'une première zone de filtre (1) et au moins une zone de filtre voisine supplémentaire (2, 3, 4, 5) qui se différencie de la première zone de filtre (1), définie sur une surface d'entrée (6) et/ou sur une surface de sortie (7) du dispositif filtrant (10), dans lequel la surface partielle recouvre au moins partiellement l'orifice (13) à un écartement prédéterminé de l'orifice (13).
  15. Aspirateur (100) selon la revendication 14, caractérisé en ce qu'une grandeur de la surface partielle du dispositif filtrant (10) atteint 50 % ou de préférence 100 % ou de façon particulièrement préférée 200 % d'une grandeur de l'orifice (13).
EP19152483.4A 2018-01-25 2019-01-18 Dispositif filtrant destiné à la réduction du bruit pour un aspirateur Active EP3517011B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018201143.5A DE102018201143B4 (de) 2018-01-25 2018-01-25 Filteranordnung zur schallreduzierung für einen staubsauger

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EP3517011A1 EP3517011A1 (fr) 2019-07-31
EP3517011B1 true EP3517011B1 (fr) 2022-07-27

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Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL287744A (fr) * 1962-01-19
US3353338A (en) * 1963-01-15 1967-11-21 Electrolux Ab Suction cleaner
US3882961A (en) * 1974-04-01 1975-05-13 Servicemaster Ind Muffler for vacuum-inducing motor
DE4214990A1 (de) * 1992-05-06 1993-11-11 Minnesota Mining & Mfg Staubsaugerbeutel und Verfahren zu seiner Herstellung
DE4315712A1 (de) 1993-05-11 1994-11-17 Siemens Ag Staubsauger
US5925171A (en) * 1993-07-22 1999-07-20 Pietrobon; Silvano Vacuum cleaner apparatus, of the type having an inner container partially submerged in water
DE10129995A1 (de) * 2001-06-25 2003-01-09 Frank Berding Vorrichtung zum Abfangen von Gegenständen aus dem Luftstrom eines Staubsaugers
DE202004019344U1 (de) * 2004-12-15 2005-03-03 Branofilter Gmbh Staubfilterbeutel
GB0623831D0 (en) * 2006-11-29 2007-01-10 Scotcan Ltd Vacuum cleaner filter assembly
DE102011007204A1 (de) 2011-04-12 2012-10-18 BSH Bosch und Siemens Hausgeräte GmbH Geräuscharme Abluftausblasanordnung
DE102012219344A1 (de) * 2012-10-23 2014-04-24 BSH Bosch und Siemens Hausgeräte GmbH Filtersystem für ein Raumpflegegerät
GB2532066B (en) 2014-11-07 2017-02-08 Ekkosense Ltd Air filter
DE102017208965A1 (de) * 2017-05-29 2018-11-29 BSH Hausgeräte GmbH Ausblaskanal für einen Staubsauger und Staubsauger aufweisend diesen Ausblaskanal

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DE102018201143B4 (de) 2024-04-18
EP3517011A1 (fr) 2019-07-31

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