EP0913650A1 - Modular type silencer - Google Patents

Modular type silencer Download PDF

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Publication number
EP0913650A1
EP0913650A1 EP98402700A EP98402700A EP0913650A1 EP 0913650 A1 EP0913650 A1 EP 0913650A1 EP 98402700 A EP98402700 A EP 98402700A EP 98402700 A EP98402700 A EP 98402700A EP 0913650 A1 EP0913650 A1 EP 0913650A1
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EP
European Patent Office
Prior art keywords
frame
modular
modular element
element according
elements
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EP98402700A
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German (de)
French (fr)
Inventor
Bernard Bajeux
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Individual
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0263—Insulation for air ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0272—Modules for easy installation or transport
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the present invention relates to a fragmented type silencer.
  • a fragmented type silencer is made of glass wool panels or rock wool fixed parallel to the vertical plane containing the axis of symmetry of the ventilation duct. These insulating panels have a length determined by the degree of sound attenuation desired.
  • the mufflers are adapted to the particularity of each building and the ventilation power wanted. They therefore have, for each realization, a different section from such so that the height of each panel of insulating material should be cut "to measure". Consequently, it is not possible to manufacture in series this type of muffler.
  • the object of the present invention is therefore to overcome the drawbacks of the prior art by proposing a fragmented type silencer adaptable to length and height.
  • fragmented type silencer is consisting of several modular elements associated longitudinally to form the length closest to the desired length; and superimposed vertically to approach the height closest to the height of the duct with a maximum difference of 69 mm for the height.
  • the modular elements are juxtaposed one behind the other in a U-shaped rail; tongues fastening being located at the ends of said rail, to retain the elements modular to each other.
  • each modular element is formed by a frame having substantially the shape of a parallelepiped rectangle, and two insulating panels held vertically and spaced, parallel to the plane containing the axis of the ventilation duct.
  • At least one panel insulation is held at the top of the frame of an element modular, parallel to the plane containing the axis of the ventilation duct.
  • an air channel is fitted to allow better absorption air while reducing the amount of absorbent material required. Indeed, by this device, the same sound attenuation is obtained with approximately 20% less insulation material.
  • the frame of the element modular is metallic and drilled with holes on at least part of the faces rounded arranged opposite the space between the insulating panels for allow the passage of air.
  • the frame of the element modular is metallic and drilled with holes on these flat faces to allow better absorption of low frequencies.
  • the vertical faces of the frame of the modular element extend perpendicular to their generatrix to form a horizontal rim on the surface of said frame.
  • two of the parallel faces of the modular element are rounded so that several elements modular juxtaposed one behind the other fit along the axis of the ventilation duct and incorporates a leak and attack nozzle.
  • each insulating panel is held at the edge of the frame, at spacers and along the sides of the faces of the frame.
  • the spacers connecting two parallel sides of the frame are stamped in a U in the center in order to consolidate the space forming the airway.
  • each modular element includes means for fixing and assembling the modular elements to each other.
  • the fixing means and of modular elements on top of each other have at minus a boss in the upper part of the frame and its housing complementary in the lower part of the frame.
  • the fixing means and of modular elements on top of each other have at minus a tab at the top of the frame and a perforated post in the lower part of the frame, said tongue penetrating into the perforation said tenon to secure the two modular elements.
  • the air path has a thickness 30 mm.
  • FIG. 1 shows a perspective view of a modular element. It is formed by a frame (1) having substantially the shape of a parallelepiped rectangle. The four vertical faces of this frame (1) extend perpendicular to their generatrix to form a horizontal rim (2) at the upper surface of the frame (1) ( Figure 2). The two more parallel faces small width are rounded.
  • a first end (9) of the frame (1) has a concave face (10) and a second end of the frame (1), forming a front, has a convex face (9).
  • the other two faces (11,12) of the frame are flat.
  • the modular elements are juxtaposed one behind the other on a rail (13) ( Figure 5,6).
  • This rail (13) is fixed to the bottom wall of the ventilation duct (14), parallel to the axis of symmetry of the ventilation duct ventilation.
  • the convex face (10) of the modular element is oriented facing the air flow.
  • the arrow A in FIG. 5 represents the direction of the air flow.
  • the convexity of the face (10) allows better penetration of air through the modular element and eliminates the use of an attack spout. While concavity of the face (9) associated with the interior air channel avoids the use of a trailing spout.
  • the shape of the modular element is in no way limiting.
  • the frame of the modular element (1) can be, for example, a frame metallic pierced with holes (15) on its rounded faces (9, 10) to allow the air passage and on these flat faces (11, 12) to allow absorption low frequencies.
  • the holes (15) drilled in the frame (1) are optional except on the parts facing the airways where they are necessary for air passage.
  • Each panel (4) has the same length as the frame (1), a thickness less than half the width of the frame (1) and a height slightly less than the height of the frame (1) ( Figures 1.3).
  • Each insulating panel (4) is fixed against the internal wall of each of the faces (11,12) of the frame.
  • An air channel (5) is provided in each modular element.
  • the air channel (5) is arranged in the center of the modular element, vertically, between the two insulating panels (4). Note that we can arrange the insulating panels and air channels horizontally. As shown by Figures 7 and 8, the track (5) facilitates the passage of air and prevents the creation of vortices due to small depressions at the end of the modular elements. In in addition, the air path (5) allows additional absorption of the waves to high frequencies.
  • the insulating panels (4) are held by spacers (3.14).
  • the spacers (3.14) connect two vertical faces of the frame (1) facing each other. They can, for example, be riveted to the frame (1).
  • the spacers (3) can be stamped in a U in the center of such so that not only do they hold the panels more securely (4) but, in addition, they consolidate the space existing between the two panels insulators, forming the air path (5).
  • the insulating panel (4) has a height such that when two modular elements fit together, the lower spacer (14) supporting the insulating panel (4) of the frame of the first element (1a) is supported on the edge (2) of the frame of the second element (1b) ( Figures 4, 12).
  • Figure 6 shows several modular elements which are juxtaposed one behind the other on a U-shaped rail (13) in order to obtain a silencer of the desired length.
  • Said rail (13) is fixed to the bottom wall of the conduit (14). Fixing tabs (8) located at the ends of said rail (13), hold the modular elements together. So even when the air currents are very strong, the modular elements remain linked ( Figures 5,6)
  • the modular elements are stacked on top of each other to get a muffler of the desired height.
  • Each modular element includes means for fixing and assembling the modular elements on each other.
  • the fixing between the different modular elements is made by nesting frames into each other.
  • the frame (1) is either slightly flared in its lower part or forms a shoulder ( Figures 3, 4). So the area of frame (1) below the insulating panel (4) has an internal width equal to the external width of the upper part of the modular element.
  • the surface external of the frame (1) has at least one boss (6) in its part upper and its corresponding housing (7) in its lower part.
  • the housings (7) located on the frame of a first element (1a) will fit together in the boss (6) of the frame of a second element (1b) located below the first element.
  • the elements modules superimposed on each other are fixed by means of studs (17) in the upper part of the frame and tabs (16) in the part bottom of the frame ( Figures 9, 10, 11, 12).
  • Each tab (16) is formed by cutting a puncture (161) in the upper part of the frame (1).
  • the tabs protrude outside the frame (1) so that they are perpendicular to the planar faces (11, 12) of the frame.
  • At least part of flat undersides of the frame (11, 12) extend slightly flared to form a stud (17).
  • This tenon (17) is perforated in its part bottom of an orifice (171) of dimension allowing the penetration of the tongue (16) in the hole (171) of the post (17).
  • Figure 11 shows that when a first modular element (1a) is placed on a second element modular (1b), the tongue (16) of the second modular element (1b) fits in the hole (171) of the post (17) of the first modular element (1a).
  • the figure 12 shows a sectional view of two modular elements assembled one on the other using this fastening means. These methods of fixing the modular elements on top of each other are in no way limiting.
  • the modular elements preferably have a height of 70 or 200 mm; by their combination we can achieve different heights. So, the remaining height between the metal or concrete pipe and the muffler modular will be a maximum of 69 mm, this height being insufficient for generate noise
  • the modular elements preferably have a width of 200 mm, and the insulating fabric a thickness of 85 mm so that the air path central has a thickness of 30 mm.
  • Airway thickness may vary between 10 and 50 mm, but it is by choosing this value of 30 mm that the better results have been observed.
  • the modular elements preferably have a length of 300 mm or 500 mm, this allows lengths of 300 mm, 500 mm, 600 mm, 800 mm, 900 mm, 1000 mm, 11 00 mm, 1200 mm, //
  • insulating panels can as well be made of glass wool, rock wool, foam or any other absorbent material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)

Abstract

The silencer is made from a series of modules, e.g. made of Fibreglass (RTM) or rock wool, linked to cover the required duct length and set vertically one on top of another to cover the whole height of the duct with a maximum difference of 69 mm. The modules are set one behind another in a U-section rail with fixing tongues at its ends, with each module comprising a frame (1) with a basic rectangular parallelepiped shape, with two vertical insulation panels (4) set at a distance from one another and parallel to a plane containing the axis of the duct. The gap (5) between the panels is designed to allow the air to flow through it, while the frame is of metal and pierced with holes (15), at least in the curved surfaces facing the gap.

Description

La présente invention concerne un silencieux de type fragmenté.The present invention relates to a fragmented type silencer.

Pour atténuer les bruits générés par les mouvements de l'air dans un conduit de ventilation, il est connu d'utiliser des silencieux de type fragmenté. Un silencieux de type fragmenté est constitué de panneaux de laine de verre ou de laine de roche fixés parallèlement au plan vertical contenant l'axe de symétrie du conduit de ventilation. Ces panneaux isolants ont une longueur déterminée par le degré d'atténuation sonore désiré. Les silencieux sont adaptés à la particularité de chaque bâtiment et à la puissance de ventilation voulue. Ils ont donc, pour chaque réalisation, une section différente de telle sorte que la hauteur de chaque panneau de matériau isolant doit être découpée "sur mesure". En conséquence, il n'est pas possible de fabriquer en série ce type de silencieux.To reduce the noise generated by the movement of air in a ventilation duct, it is known to use fragmented type silencers. A fragmented type silencer is made of glass wool panels or rock wool fixed parallel to the vertical plane containing the axis of symmetry of the ventilation duct. These insulating panels have a length determined by the degree of sound attenuation desired. The mufflers are adapted to the particularity of each building and the ventilation power wanted. They therefore have, for each realization, a different section from such so that the height of each panel of insulating material should be cut "to measure". Consequently, it is not possible to manufacture in series this type of muffler.

La présente invention a donc pour objet de pallier les inconvénients de l'art antérieur en proposant un silencieux de type fragmenté adaptable en longueur et en hauteur.The object of the present invention is therefore to overcome the drawbacks of the prior art by proposing a fragmented type silencer adaptable to length and height.

Ce but est atteint par le fait que le silencieux de type fragmenté est constitué de plusieurs éléments modulaires associés longitudinalement pour former la longueur la plus proche de la longueur voulue; et superposés verticalement pour approcher la hauteur la plus proche de la hauteur du conduit avec une différence maximum de 69 mm pour la hauteur.This object is achieved by the fact that the fragmented type silencer is consisting of several modular elements associated longitudinally to form the length closest to the desired length; and superimposed vertically to approach the height closest to the height of the duct with a maximum difference of 69 mm for the height.

Selon une autre particularité de l'invention, les éléments modulaires sont juxtaposés les uns derrière les autres dans un rail en U; des languettes de fixation étant situées aux extrémités dudit rail, pour retenir les éléments modulaires les uns aux autres.According to another feature of the invention, the modular elements are juxtaposed one behind the other in a U-shaped rail; tongues fastening being located at the ends of said rail, to retain the elements modular to each other.

Selon une autre particularité de l'invention, chaque élément modulaire est formé d'un cadre ayant sensiblement la forme d'un parallélépipède rectangle, et de deux panneaux isolants maintenus verticalement et espacés, parallèlement au plan contenant l'axe du conduit de ventilation.According to another feature of the invention, each modular element is formed by a frame having substantially the shape of a parallelepiped rectangle, and two insulating panels held vertically and spaced, parallel to the plane containing the axis of the ventilation duct.

Selon une autre particularité de l'invention, au moins un panneau isolant est maintenu au niveau de la partie supérieure du cadre d'un élément modulaire, parallèlement au plan contenant l'axe du conduit de ventilation.According to another feature of the invention, at least one panel insulation is held at the top of the frame of an element modular, parallel to the plane containing the axis of the ventilation duct.

Selon une autre particularité de l'invention, entre les deux panneaux isolants une voie d'air est aménagée pour permettre une meilleure absorption de l'air tout en réduisant la quantité de matériau absorbant nécessaire. En effet, par ce dispositif, la même atténuation phonique est obtenue avec environ 20% de matériau isolant en moins.According to another feature of the invention, between the two panels insulators an air channel is fitted to allow better absorption air while reducing the amount of absorbent material required. Indeed, by this device, the same sound attenuation is obtained with approximately 20% less insulation material.

Selon une autre particularité de l'invention, le cadre de l'élément modulaire est métallique et percé de trous sur sur au moins la partie des faces arrondies disposée en vis-à-vis de l'espace entre les panneaux isolants pour permettre le passage de l'air.According to another feature of the invention, the frame of the element modular is metallic and drilled with holes on at least part of the faces rounded arranged opposite the space between the insulating panels for allow the passage of air.

Selon une autre particularité de l'invention, le cadre de l'élément modulaire est métallique et percé de trous sur ces faces planes pour permettre une meilleure absorption des basses fréquences.According to another feature of the invention, the frame of the element modular is metallic and drilled with holes on these flat faces to allow better absorption of low frequencies.

Selon une autre particularité de l'invention, les faces verticales du cadre de l'élément modulaire se prolongent perpendiculairement à leur génératrice pour former un rebord horizontal à la surface dudit cadre.According to another feature of the invention, the vertical faces of the frame of the modular element extend perpendicular to their generatrix to form a horizontal rim on the surface of said frame.

Selon une autre particularité de l'invention, deux des faces parallèles de l'élément modulaire sont arrondies de manière à ce que plusieurs éléments modulaires juxtaposés les uns derrière les autres s'emboítent le long de l'axe du conduit de ventilation et intègre un bec de fuite et d'attaque.According to another feature of the invention, two of the parallel faces of the modular element are rounded so that several elements modular juxtaposed one behind the other fit along the axis of the ventilation duct and incorporates a leak and attack nozzle.

Selon une autre particularité de l'invention, chaque panneau isolant est maintenu au rebord du cadre, à des entretoises et le long des côtés des faces du cadre.According to another feature of the invention, each insulating panel is held at the edge of the frame, at spacers and along the sides of the faces of the frame.

Selon une autre particularité de l'invention, les entretoises reliant deux faces parallèles du cadre, sont embouties en U en leur centre afin de consolider l'espace formant la voie d'air. According to another feature of the invention, the spacers connecting two parallel sides of the frame, are stamped in a U in the center in order to consolidate the space forming the airway.

Selon une autre particularité de l'invention, chaque élément modulaire comporte des moyens de fixation et d'assemblage des éléments modulaires les uns aux autres.According to another feature of the invention, each modular element includes means for fixing and assembling the modular elements to each other.

Selon une autre particularité de l'invention, les moyens de fixation et d'assemblage des éléments modulaires les uns sur les autres comportent au moins un bossage dans la partie supérieure du cadre et son logement complémentaire dans la partie inférieure du cadre.According to another feature of the invention, the fixing means and of modular elements on top of each other have at minus a boss in the upper part of the frame and its housing complementary in the lower part of the frame.

Selon une autre particularité de l'invention, les moyens de fixation et d'assemblage des éléments modulaires les uns sur les autres comportent au moins une languette dans la partie supérieure du cadre et un tenon perforé dans la partie inférieure du cadre, ladite languette pénétrant dans la perforation dudit tenon pour solidariser les deux éléments modulaires.According to another feature of the invention, the fixing means and of modular elements on top of each other have at minus a tab at the top of the frame and a perforated post in the lower part of the frame, said tongue penetrating into the perforation said tenon to secure the two modular elements.

Selon une autre particularité de l'invention, la voie d'air a une épaisseur de 30 mm.According to another feature of the invention, the air path has a thickness 30 mm.

D'autres particularités et avantages de la présente invention apparaítront plus clairement à la lecture de la description ci-après faite en référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue en perspective d'un élément modulaire comprenant un premier moyen de fixation verticale des éléments modulaires;
  • la figure 2 représente une vue de dessus de l'élément modulaire;
  • la figure 3 représente une vue en coupe selon l'axe A-A de l'élément modulaire comprenant un premier moyen de fixation verticale des éléments modulaires;
  • la figure 4 représente une vue en coupe de deux éléments modulaires, conforme à la figure 3, emboítés verticalement l'un sur l'autre.
  • la figure 5 représente en perspective deux éléments modulaires emboítés longitudinalement l'un dans l'autre et fixés sur un rail;
  • la figure 6 représente une vue en coupe d'une gaine avec un ensemble d'éléments modulaires installés;
  • la figure 7 représente les courants d'air autour d'un élément modulaire qui ne comporte pas de voie d'air;
  • la figure 8 représente les courants d'air autour d'un élément modulaire qui comporte une voie d'air;
  • la figure 9 représente une vue d'une face arrondie d'un élément modulaire comprenant un second moyen de fixation des éléments modulaires les uns sur les autres;
  • la figure 10 représente une vue d'une face plane d'un élément modulaire conforme à la figure 9;
  • la figure 11 représente une vue en perspective de deux éléments modulaires, conforme à la figure 9;
  • la figure 12 représente une vue en coupe de deux éléments modulaires, conforme à la figure 9, fixés verticalement l'un sur l'autre.
Other features and advantages of the present invention will appear more clearly on reading the description below made with reference to the appended drawings in which:
  • FIG. 1 shows a perspective view of a modular element comprising a first means for vertical fixing of the modular elements;
  • Figure 2 shows a top view of the modular element;
  • 3 shows a sectional view along the axis AA of the modular element comprising a first means for vertical fixing of the modular elements;
  • 4 shows a sectional view of two modular elements, according to Figure 3, fitted vertically one on the other.
  • Figure 5 shows in perspective two modular elements fitted longitudinally into one another and fixed on a rail;
  • Figure 6 shows a sectional view of a sheath with a set of modular elements installed;
  • FIG. 7 represents the air currents around a modular element which does not include an air channel;
  • FIG. 8 represents the air currents around a modular element which comprises an air channel;
  • FIG. 9 represents a view of a rounded face of a modular element comprising a second means of fixing the modular elements one on the other;
  • Figure 10 shows a view of a planar face of a modular element according to Figure 9;
  • Figure 11 shows a perspective view of two modular elements, according to Figure 9;
  • Figure 12 shows a sectional view of two modular elements, according to Figure 9, fixed vertically one on the other.

Le silencieux de type fragmenté modulable selon l'invention est constitué de plusieurs éléments modulaires fixés les uns aux autres. La figure 1 représente une vue en perspective d'un élément modulaire. Il est formé d'un cadre (1) ayant sensiblement la forme d'un parallélépipède rectangle. Les quatre faces verticales de ce cadre (1) se prolongent perpendiculairement à leur génératrice pour former un rebord horizontal (2) à la surface supérieure du cadre (1) (Figure 2). Les deux faces parallèles de plus petite largeur sont arrondies. Ainsi, une première extrémité (9) du cadre (1) présente une face concave (10) et une seconde extrémité du cadre (1), lui faisant front, présente une face convexe(9). Les deux autres faces (11,12) du cadre sont planes.The modular fragmented type silencer according to the invention is consisting of several modular elements fixed to each other. Figure 1 shows a perspective view of a modular element. It is formed by a frame (1) having substantially the shape of a parallelepiped rectangle. The four vertical faces of this frame (1) extend perpendicular to their generatrix to form a horizontal rim (2) at the upper surface of the frame (1) (Figure 2). The two more parallel faces small width are rounded. Thus, a first end (9) of the frame (1) has a concave face (10) and a second end of the frame (1), forming a front, has a convex face (9). The other two faces (11,12) of the frame are flat.

Les éléments modulaires sont juxtaposés les uns derrière les autres sur un rail (13) (Figure 5,6). Ce rail (13) est fixé sur la paroi inférieure du conduit de ventilation (14), parallèlement à l'axe de symétrie du conduit de ventilation. La face convexe (10) de l'élément modulaire est orientée face au courant d'air. La flèche A de la figure 5 représente la direction du courant d'air. La convexité de la face (10) permet une meilleure pénétration de l'air à travers l'élément modulaire et supprime l'utilisation d'un bec d'attaque. Alors que la concavité de la face (9) associée à la voie d'air intérieure évite l'utilisation d'un bec de fuite. La forme de l'élément modulaire n'est nullement limitative.The modular elements are juxtaposed one behind the other on a rail (13) (Figure 5,6). This rail (13) is fixed to the bottom wall of the ventilation duct (14), parallel to the axis of symmetry of the ventilation duct ventilation. The convex face (10) of the modular element is oriented facing the air flow. The arrow A in FIG. 5 represents the direction of the air flow. The convexity of the face (10) allows better penetration of air through the modular element and eliminates the use of an attack spout. While concavity of the face (9) associated with the interior air channel avoids the use of a trailing spout. The shape of the modular element is in no way limiting.

Le cadre de l'élément modulaire (1) peut être par exemple, un cadre métallique percé de trous (15) sur ses faces arrondies (9, 10) pour permettre le passage de l'air et sur ces faces planes (11, 12) pour permettre une absorption des basses fréquences. Les trous (15) percés dans le cadre (1) sont facultatifs sauf sur les parties en vis-à-vis des voies d'air où ils sont nécessaires au passage de l'air.The frame of the modular element (1) can be, for example, a frame metallic pierced with holes (15) on its rounded faces (9, 10) to allow the air passage and on these flat faces (11, 12) to allow absorption low frequencies. The holes (15) drilled in the frame (1) are optional except on the parts facing the airways where they are necessary for air passage.

Deux panneaux de matériau isolant (4) sont maintenus dans le cadre (1) par des entretoises supérieures (3) et inférieures (14). Chaque panneau (4) a la même longueur que le cadre (1), une épaisseur inférieure à la demi largeur du cadre (1) et une hauteur légèrement inférieure à la hauteur du cadre (1) (Figures 1,3). Chaque panneau isolant (4) est fixé contre la paroi interne de chacune des faces (11,12) du cadre.Two panels of insulating material (4) are held in the frame (1) by upper (3) and lower (14) spacers. Each panel (4) has the same length as the frame (1), a thickness less than half the width of the frame (1) and a height slightly less than the height of the frame (1) (Figures 1.3). Each insulating panel (4) is fixed against the internal wall of each of the faces (11,12) of the frame.

Une voie d'air (5) est aménagée dans chaque élément modulaire. La voie d'air (5) est aménagée au centre de l'élément modulaire, verticalement, entre les deux panneaux isolants (4). On notera que l'on peut disposer les panneaux isolants et les voies d'air horizontalement. Comme le montre les figures 7 et 8, la voie (5) facilite le passage de l'air et évite la création de tourbillons dus à de petites dépressions au bout des éléments modulaires. En outre, la voie d'air (5) permet une absorption supplémentaire des ondes à hautes fréquences.An air channel (5) is provided in each modular element. The air channel (5) is arranged in the center of the modular element, vertically, between the two insulating panels (4). Note that we can arrange the insulating panels and air channels horizontally. As shown by Figures 7 and 8, the track (5) facilitates the passage of air and prevents the creation of vortices due to small depressions at the end of the modular elements. In in addition, the air path (5) allows additional absorption of the waves to high frequencies.

Avantageusement, les panneaux isolants (4) sont maintenus par des entretoises (3,14). Les entretoises (3,14) relient deux faces verticales du cadre (1) se faisant front. Elles peuvent, par exemple, être rivetées au cadre (1). De plus, les entretoises (3) peuvent être embouties en U en leur centre de telle sorte que, non seulement elles maintiennent plus solidement les panneaux (4) mais, en plus, elles consolident l'espace existant entre les deux panneaux isolants, formant la voie d'air (5). Le panneau isolant (4) a une hauteur telle que lorsque deux éléments modulaires viennent s'emboíter l'un sur l'autre, l'entretoise inférieure (14) soutenant le panneau isolant (4) du cadre du premier élément (1a) est en appui sur le rebord (2) du cadre du second élément (1b) (Figures 4, 12).Advantageously, the insulating panels (4) are held by spacers (3.14). The spacers (3.14) connect two vertical faces of the frame (1) facing each other. They can, for example, be riveted to the frame (1). Of more, the spacers (3) can be stamped in a U in the center of such so that not only do they hold the panels more securely (4) but, in addition, they consolidate the space existing between the two panels insulators, forming the air path (5). The insulating panel (4) has a height such that when two modular elements fit together, the lower spacer (14) supporting the insulating panel (4) of the frame of the first element (1a) is supported on the edge (2) of the frame of the second element (1b) (Figures 4, 12).

La figure 6 représente plusieurs éléments modulaires qui sont juxtaposés les uns derrière les autres sur un rail (13) en U afin d'obtenir un silencieux de la longueur voulue. Ledit rail (13) est fixé sur la paroi inférieure du conduit (14). Des languettes de fixation (8) situées aux extrémités dudit rail (13), retiennent les éléments modulaires les uns aux autres. Ainsi, même lorsque les courants d'air sont très forts, les éléments modulaires restent liés.(Figures 5,6)Figure 6 shows several modular elements which are juxtaposed one behind the other on a U-shaped rail (13) in order to obtain a silencer of the desired length. Said rail (13) is fixed to the bottom wall of the conduit (14). Fixing tabs (8) located at the ends of said rail (13), hold the modular elements together. So even when the air currents are very strong, the modular elements remain linked (Figures 5,6)

Les éléments modulaires sont empilés les uns sur les autres pour obtenir un silencieux de la hauteur désirée. Chaque élément modulaire comporte des moyens de fixation et d'assemblage des éléments modulaires les uns sur les autres. Selon un mode de réalisation de l'invention, la fixation entre les différents éléments modulaires est réalisée par emboítement des cadres les uns dans les autres. Le cadre (1) est soit légèrement évasé dans sa partie inférieure soit forme un épaulement (Figures 3, 4). Ainsi, la zone du cadre (1) en dessous du panneau isolant (4) a une largeur interne égale à la largeur externe de la partie supérieure de l'élément modulaire. La surface externe du cadre (1) comporte au moins un bossage (6) dans sa partie supérieure et son logement correspondant (7) dans sa partie inférieure. Les logements (7) situés sur le cadre d'un premier élément (1a) vont s'emboíter dans le bossage (6) du cadre d'un second élément (1b) situé en dessous du premier élément.The modular elements are stacked on top of each other to get a muffler of the desired height. Each modular element includes means for fixing and assembling the modular elements on each other. According to one embodiment of the invention, the fixing between the different modular elements is made by nesting frames into each other. The frame (1) is either slightly flared in its lower part or forms a shoulder (Figures 3, 4). So the area of frame (1) below the insulating panel (4) has an internal width equal to the external width of the upper part of the modular element. The surface external of the frame (1) has at least one boss (6) in its part upper and its corresponding housing (7) in its lower part. The housings (7) located on the frame of a first element (1a) will fit together in the boss (6) of the frame of a second element (1b) located below the first element.

Selon un autre mode de réalisation de l'invention, les éléments modulaires superposés les uns sur les autres sont fixés au moyen de tenons (17) dans la partie supérieure du cadre et de languettes (16) dans la partie inférieure du cadre (Figures 9, 10, 11, 12). Chaque languette (16) est formée par découpage d'un crevé (161) dans la partie supérieure du cadre (1). Les languettes font saillies à l'extérieur du cadre (1) de telle sorte qu'elles soient perpendiculaires aux faces planes (11, 12) du cadre. Au moins une partie des faces inférieures planes du cadre (11, 12) se prolonge de manière légèrement évasé afin de former un tenon (17). Ce tenon (17) est perforé dans sa partie inférieure d'un orifice (171) de dimension permettant la pénétration de la languette (16) dans l'orifice (171) du tenon (17). La figure 11 montre que lorsque un premier élément modulaire (1a) est placé sur un second élément modulaire (1b), la languette (16) du second élément modulaire (1b) s'encastre dans l'orifice (171) du tenon (17) du premier élément modulaire (1a). La figure 12 représente une vue en coupe de deux éléments modulaires assemblés l'un sur l'autre à l'aide de ce moyen de fixation. Ces modes de fixations des éléments modulaires les uns sur les autres ne sont nullement limitatifs.According to another embodiment of the invention, the elements modules superimposed on each other are fixed by means of studs (17) in the upper part of the frame and tabs (16) in the part bottom of the frame (Figures 9, 10, 11, 12). Each tab (16) is formed by cutting a puncture (161) in the upper part of the frame (1). The tabs protrude outside the frame (1) so that they are perpendicular to the planar faces (11, 12) of the frame. At least part of flat undersides of the frame (11, 12) extend slightly flared to form a stud (17). This tenon (17) is perforated in its part bottom of an orifice (171) of dimension allowing the penetration of the tongue (16) in the hole (171) of the post (17). Figure 11 shows that when a first modular element (1a) is placed on a second element modular (1b), the tongue (16) of the second modular element (1b) fits in the hole (171) of the post (17) of the first modular element (1a). The figure 12 shows a sectional view of two modular elements assembled one on the other using this fastening means. These methods of fixing the modular elements on top of each other are in no way limiting.

Les éléments modulaires ont préférentiellement une hauteur de 70 ou de 200 mm ; par leur combinaison on peut réaliser différentes hauteurs. Ainsi, la hauteur restante entre le conduit en métal ou en béton et le silencieux modulaire sera au maximum de 69 mm, cette hauteur étant insuffisante pour générer des bruitsThe modular elements preferably have a height of 70 or 200 mm; by their combination we can achieve different heights. So, the remaining height between the metal or concrete pipe and the muffler modular will be a maximum of 69 mm, this height being insufficient for generate noise

Les éléments modulaires ont préférentiellement une largeur de 200 mm, et le tissu isolant une épaisseur de 85 mm de telle sorte la voie d'air centrale ait une épaisseur de 30 mm. L'épaisseur de la voie d'air peut varier entre 10 et 50 mm, mais c'est en choisissant cette valeur de 30 mm que les meilleurs résultats ont été observés.The modular elements preferably have a width of 200 mm, and the insulating fabric a thickness of 85 mm so that the air path central has a thickness of 30 mm. Airway thickness may vary between 10 and 50 mm, but it is by choosing this value of 30 mm that the better results have been observed.

Les éléments modulaires ont préférentiellement une longueur de 300 mm ou de 500 mm, cela permet de réaliser des longueurs de 300 mm, 500 mm, 600 mm, 800 mm, 900 mm, 1000 mm, 11 00 mm, 1200 mm,.....The modular elements preferably have a length of 300 mm or 500 mm, this allows lengths of 300 mm, 500 mm, 600 mm, 800 mm, 900 mm, 1000 mm, 11 00 mm, 1200 mm, .....

Sur la figure 6, quatre éléments modulaires de 500 mm x 200 mm X 200 mm (Longueur x largeur x hauteur), deux éléments modulaires de 300 mm x 200 mm x 200 mm, deux éléments modulaires de 500 mm x 70 mm x 200 mm et un élément modulaire de 300 mm x 70 mm X 200 mm ont été montés sur un rail (13). L'assemblage de ces éléments modulaires engendre un silencieux de type fragmenté d'une longueur approchant la longueur voulue et d'une hauteur approchant la hauteur du conduit (14).In Figure 6, four modular elements of 500 mm x 200 mm X 200 mm (length x width x height), two modular elements of 300 mm x 200 mm x 200 mm, two modular elements of 500 mm x 70 mm x 200 mm and a modular element of 300 mm x 70 mm X 200 mm have been mounted on a rail (13). The assembly of these modular elements generates a fragmented type muffler of a length approaching the desired length and a height approaching the height of the duct (14).

Il est clair que d'autres modifications à la portée de l'homme du métier entrent dans le cadre de l'invention; Ainsi, les panneaux isolants peuvent tout aussi bien être constitués de laine de verre, de laine de roche, d'une mousse ou tout autre matériau absorbant.It is clear that other modifications within the reach of those skilled in the art fall within the scope of the invention; Thus, insulating panels can as well be made of glass wool, rock wool, foam or any other absorbent material.

Claims (15)

Silencieux de type fragmenté caractérisé en ce que plusieurs éléments modulaires sont associés longitudinalement pour former la longueur la plus proche de la longueur voulue et plusieurs éléments modulaires sont superposés verticalement pour approcher la hauteur la plus proche de la hauteur du conduit avec une différence maximum de 69 mm pour la hauteur.Fragmented type silencer characterized in that several modular elements are combined longitudinally to form the length closest to the desired length and several modular elements are vertically superimposed to approach the height closest to the height of the duct with a maximum difference of 69 mm for the height. Silencieux de type fragmenté modulable selon la revendication 1 caractérisé en ce que les éléments modulaires sont juxtaposés les uns derrière les autres dans un rail (13) en U; des languettes de fixation (8) étant situées aux extrémités dudit rail (13), pour retenir les éléments modulaires les uns aux autres.Modular fragmented type silencer according to claim 1 characterized in that the modular elements are juxtaposed one behind the other the others in a U-shaped rail (13); fixing tabs (8) being located at the ends of said rail (13), to retain the modular elements at other. Elément modulaire selon les revendications 1 à 2 caractérisé en ce que chaque élément modulaire est formé d'un cadre (1) ayant sensiblement la forme d'un parallélépipède rectangle, et de deux panneaux isolants (4) maintenus verticalement et espacés, parallèlement au plan contenant l'axe du conduit de ventilation.Modular element according to claims 1 to 2 characterized in that each modular element is formed of a frame (1) having substantially the shape of a rectangular parallelepiped, and two insulating panels (4) held vertically and spaced apart, parallel to the plane containing the axis of the ventilation duct. Elément modulaire selon la revendication 3 caractérisé en ce que au moins un panneau isolant (4) est maintenu au niveau de la partie supérieure du cadre (1) d'un élément modulaire, parallèlement au plan contenant l'axe du conduit de ventilation.Modular element according to claim 3 characterized in that at at least one insulating panel (4) is maintained at the level of the upper part of the frame (1) of a modular element, parallel to the plane containing the axis of the ventilation duct. Elément modulaire selon la revendication 3 caractérisé en ce qu'entre deux panneaux isolants (4) une voie d'air (5) est aménagée pour permettre le passage de l'air et une meilleure absorption de l'air tout en réduisant la quantité de matériau isolant nécessaire.Modular element according to claim 3 characterized in that between two insulating panels (4) an air channel (5) is arranged for allow the passage of air and better absorption of air while reducing the amount of insulating material required. Elément modulaire selon la revendications 3 caractérisé en ce que le cadre (1) de l'élément modulaire est métallique et percé de trous (15) sur au moins la partie des faces arrondies disposée en vis-à-vis de l'espace entre les panneaux isolants pour permettre le passage de l'air. Modular element according to claim 3 characterized in that the frame (1) of the modular element is metallic and pierced with holes (15) on the minus the part of the rounded faces arranged opposite the space between the insulating panels to allow the passage of air. Elément modulaire selon la revendications 3 caractérisé en ce que le cadre (1) de l'élément modulaire est métallique et percé de trous (15) sur ces faces planes (11, 12) pour permettre une meilleure absorption des basses fréquences.Modular element according to claim 3 characterized in that the frame (1) of the modular element is metallic and pierced with holes (15) on these flat faces (11, 12) to allow better absorption of bass frequencies. Elément modulaire selon la revendication 3 caractérisé en ce que les faces verticales du cadre (1) de l'élément modulaire se prolongent perpendiculairement à leur génératrice pour former un rebord horizontal (2) à la surface dudit cadre.Modular element according to claim 3 characterized in that the vertical faces of the frame (1) of the modular element extend perpendicular to their generatrix to form a horizontal rim (2) at the surface of said frame. Elément modulaire selon la revendication 1 caractérisé en ce que deux des faces parallèles de l'élément modulaire sont arrondies de manière à ce que plusieurs éléments modulaires juxtaposés les uns derrière les autres s'emboítent le long de l'axe du conduit de ventilation et intègre un bec d'attaque et un bec de fuite.Modular element according to claim 1 characterized in that two of the parallel faces of the modular element are rounded so as to what several modular elements juxtaposed one behind the other fit along the axis of the ventilation duct and incorporates a leading nozzle and a trailing spout. Elément modulaire selon la revendication 3 caractérisé en ce que chaque panneau isolant (4) est maintenu au rebord (2) du cadre (1), à des entretoises (3, 14) et le long des côtés des faces (11,12) du cadre.Modular element according to claim 3 characterized in that each insulating panel (4) is held at the edge (2) of the frame (1), at spacers (3, 14) and along the sides of the faces (11, 12) of the frame. Elément modulaire selon la revendication 9 caractérisé en ce que les entretoises (3,14) reliant deux faces parallèles du cadre (1), sont embouties en U en leur centre afin de consolider l'espace formant la voie d'air (5).Modular element according to claim 9 characterized in that the spacers (3.14) connecting two parallel faces of the frame (1) are stamped U-shaped in their center to consolidate the space forming the air path (5). Elément modulaire selon la revendication 1 caractérisé en ce que chaque élément modulaire comporte des moyens de fixation et d'assemblage des éléments modulaires les uns aux autres.Modular element according to claim 1 characterized in that each modular element includes fixing and assembly means modular elements to each other. Elément modulaire selon la revendication 11 caractérisé en ce que les moyens de fixation et d'assemblage des éléments modulaires les uns sur les autres comportent au moins un bossage (6) dans la partie supérieure du cadre et son logement complémentaire (7) dans la partie inférieure du cadre.Modular element according to claim 11 characterized in that the means for fixing and assembling the modular elements one on the others have at least one boss (6) in the upper part of the frame and its complementary housing (7) in the lower part of the frame. Elément modulaire selon la revendication 11 caractérisé en ce que les moyens de fixation et d'assemblage des éléments modulaires les uns sur les autres comportent au moins une languette (16) dans la partie supérieure du cadre et un tenon perforé (17) dans la partie inférieure du cadre, ladite languette (16) pénétrant dans la perforation dudit tenon (17) pour solidariser les deux éléments modulaires.Modular element according to claim 11 characterized in that the means for fixing and assembling the modular elements one on the others have at least one tab (16) in the upper part of the frame and a perforated post (17) in the lower part of the frame, said frame tongue (16) penetrating into the perforation of said tenon (17) to secure the two modular elements. Elément modulaire selon la revendication 5 caractérisé en ce que la voie d'air (5) a une épaisseur de 30 mm.Modular element according to claim 5 characterized in that the air path (5) has a thickness of 30 mm.
EP98402700A 1997-10-30 1998-10-29 Modular type silencer Withdrawn EP0913650A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9713640A FR2770624B1 (en) 1997-10-30 1997-10-30 FRAGMENT TYPE MUFFLER
FR9713640 1997-10-30

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EP0913650A1 true EP0913650A1 (en) 1999-05-06

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FR (1) FR2770624B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2362345A1 (en) * 1973-12-14 1975-06-19 Josef Ivan Matyas Tubular cell air sound damper in air conditioning systems - is assembled to required size from individual mass-produced cells
US4582164A (en) * 1985-03-06 1986-04-15 Carrier Corporation Method and apparatus for noise reduction
US5532439A (en) * 1994-06-23 1996-07-02 Transco Products Inc. Silencer assembly with acoustical modules therein
US5679931A (en) * 1995-07-10 1997-10-21 Aaf-International Sound attenuating apparatus and method of forming the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2362345A1 (en) * 1973-12-14 1975-06-19 Josef Ivan Matyas Tubular cell air sound damper in air conditioning systems - is assembled to required size from individual mass-produced cells
US4582164A (en) * 1985-03-06 1986-04-15 Carrier Corporation Method and apparatus for noise reduction
US5532439A (en) * 1994-06-23 1996-07-02 Transco Products Inc. Silencer assembly with acoustical modules therein
US5679931A (en) * 1995-07-10 1997-10-21 Aaf-International Sound attenuating apparatus and method of forming the same

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FR2770624B1 (en) 2000-01-07
FR2770624A1 (en) 1999-05-07

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