EP0597180B1 - Amortisseur acoustique - Google Patents

Amortisseur acoustique Download PDF

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Publication number
EP0597180B1
EP0597180B1 EP93109816A EP93109816A EP0597180B1 EP 0597180 B1 EP0597180 B1 EP 0597180B1 EP 93109816 A EP93109816 A EP 93109816A EP 93109816 A EP93109816 A EP 93109816A EP 0597180 B1 EP0597180 B1 EP 0597180B1
Authority
EP
European Patent Office
Prior art keywords
foamed material
length
material body
interruptions
damping element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93109816A
Other languages
German (de)
English (en)
Other versions
EP0597180A1 (fr
Inventor
Gerhard Dr. Müller-Broll
Reinhard Stief
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0597180A1 publication Critical patent/EP0597180A1/fr
Application granted granted Critical
Publication of EP0597180B1 publication Critical patent/EP0597180B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/8209—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only sound absorbing devices

Definitions

  • the invention relates to an air silencer, consisting of an open-cell foam body, which is designed like a board.
  • Such an air silencer is known from DE-U-90 01 433.
  • the air silencer is designed as a wall element for a flushing system, for example a dishwasher, and consists of an open-cell polyethylene foam.
  • a foam sheet element is received in an essentially U-shaped suspension rail which has holding projections pointing inwards.
  • the foam panel element is interchangeably connected to the suspension rail.
  • a web for a grid ceiling which has longitudinal electrical conductors in the area of its surface.
  • the webs can be put together to form a grid ceiling.
  • the load-bearing web has a notch in its upper region, into which a non-load-bearing web is inserted, which also has a notch in its lower region.
  • a cross connection is created, the webs being inserted into one another in the area of their notches.
  • the webs are made of a tough, hard material.
  • air silencers which mostly have a cubic or cylindrical shape and are provided with holding devices, for example, to be attached to hall ceilings. It should be noted, however, that the absorption area is comparatively small compared to the enclosed space that is occupied and the effectiveness of the individual silencer is therefore unsatisfactory.
  • the invention has for its object to develop an air muffler of the previously known type such that there is a relative increase in the absorption area to the size and associated, improved performance and better adaptation to the particular application.
  • the advantage here is that, compared to, for example, cubic silencers of the same dimensions, the absorption area is increased by a factor of 1.5 to 10.
  • the large absorption area results in a more effective sound absorption with the same size or significantly smaller dimensions with the same effectiveness.
  • the multi-part and pluggable design makes it easy to transport large air silencer units.
  • the air silencer can be adapted particularly well to the particular circumstances of the application by plugging the individual foam bodies together.
  • the dimensioning of the openings results in a durable, frictional and positive connection of the entire air silencer after the assembly of the individual foam body panels.
  • the individual elements from which the air silencer is composed can be connected to one another in any shape and number.
  • the storage of the individual elements can be simplified in that the individual elements do not differ in their dimensions, but consist of a foam with a different density.
  • the advantage here is that the air muffler can be spatially aligned at the destination such that sound vibrations of different frequencies that strike the air muffler from different directions can be simultaneously absorbed.
  • the foam body has an essentially matching length and width. It follows from this that the air muffler, which is formed, for example, from four foam bodies which can be plugged together, has essentially cube-shaped external dimensions and can therefore be attached to its destination in any position with the same effectiveness.
  • the openings can each have a width which is delimited by delimiting surfaces, the delimiting surfaces of each opening facing each other being provided with at least one cut-out which increases the width of the cross section of the openings.
  • the free cut can have a length that is 0.5 to 0.9, preferably 0.65 to 0.76 times as large as the length of the opening and a thickness that corresponds to the thickness of the foam body, the free cut in its length is limited on both sides by a shoulder projecting in the direction of the opposite boundary surface.
  • a free cut is preferably provided on each boundary surface.
  • a deviating number for example two free cuts, require improved guidance and support of the two foam bodies to one another with somewhat longer production outlay and a minimally more complex assembly in the assembled state of the air silencer.
  • the foam bodies are held in the area of the projecting shoulders after they have been plugged together.
  • the shoulders can be rounded, for example, for easier assembly and to avoid hooking of the two foam bodies before the completed joining process, or they can be in the form of an insertion bevel.
  • the foam bodies can be provided with a holding device on at least one of their end faces.
  • the holding device requires an additional connection of the foam bodies fixed to one another and, on the other hand, enables the elastically flexible air silencer to be attached to walls or ceilings.
  • the air silencer is preferably used as a ceiling absorber.
  • the ceiling absorber can be hung vertically or horizontally.
  • a holding device is provided in the area of both end faces, which are mutually supported according to an advantageous embodiment.
  • the advantage here is that the foam bodies are not exposed to tensile and bending loads.
  • the holding plates can be provided with hooks and eyes so that several air silencers can be attached to the ceiling in the form of a chain. The resulting forces are transmitted via the holding plates and the linkage connecting the holding plates, so that the foam bodies are not subjected to loads which reduce the service life.
  • Fig. 1 an open-pore foam body, which is designed like a board, is shown.
  • FIG. 2 An open-pore foam body is shown in FIG. 2, similar to that in FIG. 1, but with differently designed openings.
  • FIGS. 1 and 2 are each assembled into an air silencer and shown in a view from above.
  • a foam body 1 is shown as a plate element which can be supplemented with a plurality of similarly shaped foam bodies to form an air silencer.
  • Each foam body 1 has an open-pore structure and is designed like a board.
  • the openings 3 are formed like teeth and in this embodiment they have the same shape.
  • the openings 3 penetrate the entire thickness 7 of the foam body 1 and have a corresponding thickness 6.
  • the length 4 of the openings 3 corresponds to half the length 5 of the foam body 1.
  • the openings 3 are each provided with a cutout 13 on the facing boundary surfaces 11, 12.
  • the assembly is made much easier by this configuration, since the surfaces no longer touch each other over the entire surface when plugged together and therefore do not get caught.
  • the fixing of the foam bodies to one another takes place only via the shoulders 16, 17, namely by friction.
  • the foam body 1 shown here is provided in order to be joined together with three further, similarly designed foam bodies to form a unit.
  • FIG. 2 shows a foam body 1 which is designed similarly to that of FIG. 1.
  • the only difference can be seen in the shape of the openings 3.
  • the paragraphs 16, 17 are formed on the mouth of the opening 3 facing side 18 with sharp edges and protruding at right angles.
  • On the opposite end face 19 are the Heels in the area of their transition to the boundary surfaces 11, 12 beveled.
  • a different configuration for example a rounded transition, is also conceivable.
  • This configuration has the advantage of simplified assembly compared to the shape shown in FIG. 1. Due to the bevelled transition between the free cut 13 and the boundary surfaces 11, 12, the foam bodies which can be plugged into one another are guided into their final position. A jamming and a related readjustment of the foam body in their position to each other can be prevented during assembly. In contrast, paragraphs 16.1, 17.1, starting from free cut 13, are transferred into the boundary surfaces 11, 12 with sharp edges. This configuration requires a barb effect when the assembled foam body is loaded against the direction of assembly. This configuration simplifies handling.
  • FIG. 3 an air silencer consisting of four identical foam bodies 1, 2, 21, 22 is shown in the assembled state.
  • the plate-shaped foam bodies are plugged together in the area of their openings 3.
  • Fig. 4 the air silencer is shown as a ceiling absorber.
  • the plate-shaped foam bodies are put together to form a structure according to FIG. 3 and are fastened to a schematically illustrated ceiling 23 by holding plates 20 on each end face 18, 19.
  • the holding plates 20 can be made of light metal, for example and connected to one another by a connecting strut 24.
  • the holding plates 20 are provided on the one end face 19 with eyelets and on the opposite end face 18 with hooks. This configuration allows several of the air silencers according to the invention to be connected to one another.
  • the entire roof ridge can be filled with the air mufflers according to the invention through this configuration.
  • two air silencers are attached to the ceiling 23 in a chain-like manner, while the air silencers of the adjacent chain are arranged offset thereto. This configuration improves the overall effectiveness and the influence of the air silencers on one another is less.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Building Environments (AREA)

Claims (6)

  1. Amortisseur acoustique comprenant un corps en mousse expansée (1) à cellules ouvertes conçu en forme de planche, caractérisé en ce que dans le corps en mousse expansée (1) sont prévues deux découpures (3) s'étendant parallèlement l'une à l'autre d'une configuration concordante, qui débouchent dans deux faces latérales (1.1), qui présentent respectivement la longueur (5) et la largeur (8) du corps en mousse expansée (1) et qui s'étendent transversalement à la direction des découpures (3), en ce que les découpures (3) présentent une longueur (4), qui correspond à environ la demi-longueur (5) du corps en mousse expansée (1) et une épaisseur (6), qui correspond à l'épaisseur (7) du corps en mousse expansée (1), et en ce que les extrémités des découpures (3) débouchent en outre dans un bord commun de la surface latérale (1.1), pour l'emboîter dans un autre corps en mousse expansée (2) de conception identique.
  2. Amortisseur acoustique selon la revendication 1, caractérisé en ce que le corps en mousse expansée (1) a une longueur (5) et une largeur (8) substantiellement concordantes.
  3. Amortisseur acoustique selon l'une des revendications 1 à 2, caractérisé en ce que les découpures (3) présentent respectivement une largeur limitée par des surfaces limitantes (11, 12) et en ce que les surfaces limitantes (11, 12) en regard l'une de l'autre de chaque découpure (3) sont pourvues chacune d'au moins une dépouille (13) qui agrandit la largeur de la section des découpures (3).
  4. Amortisseur acoustique selon la revendication 3, caractérisé en ce que la dépouille (13) présente une longueur (14) de 0,5 à 0,9 fois aussi grande que la longueur (4) de la découpure (3), et une épaisseur (15), correspondante à l'épaisseur (7) du corps en mousse expansée, et en ce que la dépouille (13) est limitée dans sa longueur (4) des deux côtés par un épaulement (16, 17) en saillie en direction de la surface limitante (11, 12) opposée.
  5. Amortisseur acoustique selon l'une des revendications 1 à 4, caractérisé en ce que les corps en mousse expansée (1, 2) sont pourvus sur au moins l'une de leur face avant (18, 19) d'un dispositif de fixation (20).
  6. Amortisseur acoustique selon l'une des revendications 1 à 5, caractérisé par son emploi comme absorbeur de plafond.
EP93109816A 1992-11-13 1993-06-19 Amortisseur acoustique Expired - Lifetime EP0597180B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4238352A DE4238352C1 (de) 1992-11-13 1992-11-13 Luftschalldämpfer
DE4238352 1992-11-13

Publications (2)

Publication Number Publication Date
EP0597180A1 EP0597180A1 (fr) 1994-05-18
EP0597180B1 true EP0597180B1 (fr) 1996-04-24

Family

ID=6472811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109816A Expired - Lifetime EP0597180B1 (fr) 1992-11-13 1993-06-19 Amortisseur acoustique

Country Status (4)

Country Link
US (1) US5495078A (fr)
EP (1) EP0597180B1 (fr)
JP (1) JPH06208386A (fr)
DE (2) DE4238352C1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040177980A1 (en) * 2003-03-13 2004-09-16 Ingersoll-Rand Company Pneumatic tool muffler
US7549509B2 (en) 2005-04-21 2009-06-23 Ingersoll-Rand Company Double throat pulsation dampener for a compressor
DE202014101267U1 (de) 2014-03-19 2015-07-01 Rehau Ag + Co Vorrichtung zur Beeinflussung von Schall bzw. Schallenergie

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2706530A (en) * 1953-04-29 1955-04-19 Robert R Abrams Functional sound absorber and method of absorbing sound
US4034534A (en) * 1973-04-30 1977-07-12 Intalite International Louvered ceiling
DE2734044A1 (de) * 1977-07-28 1979-02-08 Dieter Steeb Gitterrost
DE2735153A1 (de) * 1977-08-04 1979-02-15 Helmut Pelzer Spezifisch leichtes feder-masse- system in bekannter weise als doppelmatte ausgebildet
JPS61131699A (ja) * 1984-11-30 1986-06-19 Trio Kenwood Corp スピ−カ用振動板及びその製造法
DE3541052A1 (de) * 1985-11-19 1987-05-21 Marquet & Cie Noel Schaumstoffplatten und -bloecke aus hohlprofilen, deren herstellung, sowie deren verwendung als isolier- und/oder drainageplatten
DE9001433U1 (fr) * 1990-02-08 1991-06-06 Irbit Research + Consulting Ag, Freiburg/Fribourg, Ch
DE9003698U1 (fr) * 1990-03-30 1990-06-21 Studiodesign Mecking Gmbh & Co. Kg, 4292 Rhede, De
US5174090A (en) * 1990-08-30 1992-12-29 Hunter Douglas Architectural Products Inc. Grid ceiling

Also Published As

Publication number Publication date
US5495078A (en) 1996-02-27
EP0597180A1 (fr) 1994-05-18
DE59302356D1 (de) 1996-05-30
JPH06208386A (ja) 1994-07-26
DE4238352C1 (de) 1994-02-17

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