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EP4109008B1 - Atténuateur pour le conduit d'air conditionné et le procédé de sa production - Google Patents

Atténuateur pour le conduit d'air conditionné et le procédé de sa production Download PDF

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Publication number
EP4109008B1
EP4109008B1 EP22179396.1A EP22179396A EP4109008B1 EP 4109008 B1 EP4109008 B1 EP 4109008B1 EP 22179396 A EP22179396 A EP 22179396A EP 4109008 B1 EP4109008 B1 EP 4109008B1
Authority
EP
European Patent Office
Prior art keywords
attenuator
frame
air
mantle
adjusting plug
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.)
Active
Application number
EP22179396.1A
Other languages
German (de)
English (en)
Other versions
EP4109008A1 (fr
EP4109008C0 (fr
Inventor
Jyrki HÄMÄLÄINEN
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.)
Jeven Oy
Original Assignee
Jeven Oy
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 Jeven Oy filed Critical Jeven Oy
Publication of EP4109008A1 publication Critical patent/EP4109008A1/fr
Application granted granted Critical
Publication of EP4109008B1 publication Critical patent/EP4109008B1/fr
Publication of EP4109008C0 publication Critical patent/EP4109008C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • 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
    • F24F13/0245—Manufacturing or assembly of air ducts; Methods therefor

Definitions

  • the invention generally relates to an attenuator to be installed in an air-conditioning duct.
  • One solution for adjusting the air flow speed and volume in a room's supply or exhaust air duct is a disc valve.
  • the air flow is adjusted by turning the closing disc of the disc valve around its axle, whereby the flow gap (distance) between the closing disc and the valve frame increases or decreases in accordance with the turning direction of the closing disc.
  • a problem with a disc valve is that its sound attenuating properties are weak, its adjustment unprecise, when the distance between the closing disc and the valve frame is adjusted without measuring, and its adjustment is difficult, when the determining of the distance between the closing plate and the valve frame being a prerequisite for the desired air flow and corresponding thereto requires measuring with separate measuring means and a precise adjustment of the distance based on the measuring result.
  • One object of the invention is to solve prior art problems and implement an easily installable attenuator manufactured from a flexible material, which presses tightly against the inner surface of the air-conditioning duct comprising a threaded seam, with the aid of which attenuator the amount of air flow in the air-conditioning duct can be adjusted and the sound caused by the air flow can be attenuated in an efficient manner.
  • One object of the invention is accomplished by the attenuator and manufacturing method according to the independent claims.
  • Some embodiments of the invention comprise the attenuator and manufacturing method according to the independent claims.
  • One attenuator to be installed in an air-conditioning duct comprises a cylindrical frame, flow openings in a direction of a mantle of the frame, and at least one adjusting plug.
  • the frame is manufactured from a porous, sound-absorbing, flexible material so that the mantle of the installed attenuator presses against an inner surface of the air-conditioning duct.
  • the cross-sectional shape and dimensions of the at least one adjusting plug correspond to a corresponding flow opening so that the at least one adjusting plug can be fitted into the corresponding flow opening in order to adjust the amount of air flow in the air-conditioning duct.
  • the angle between a surface formed by a supply air end of the attenuator and the mantle, and an angle between a surface formed by an exhaust air end of the attenuator and the mantle are sharp angles achieving a narrowing of a middle part of the frame, where a diameter of a cross-section of the attenuator is smaller than diameters of the surfaces formed by the supply air end and exhaust air end in order to improve a pressing of the mantle against the inner surface of the air-conditioning duct.
  • One manufacturing method which is meant for manufacturing the above-mentioned attenuator, comprises at least following steps of installing manufacturing in a shape cutter and pressing, by the shape cutter, the manufacturing material with the aid of a mold into a shape of the attenuator so that the narrowing is formed in the middle part of the frame, where the diameter of the cross-section of the attenuator is smaller than the diameters of the surfaces formed by the supply air end and the exhaust air end.
  • Fig. 1a-1d show an attenuator 102 meant for adjusting and measuring air flow IL and attenuating the sound caused by the air flow IL, which can be installed in a threaded seam air-conditioning duct (air-conditioning pipe) 300.
  • the attenuator 102 has a cylindrical frame 104, which is manufactured from porous, sound-absorbing, flexible material.
  • the frame 104 has a mantle 106, which has a depth (height, length) SY and a surface area VP, and supply air and exhaust air ends 108, 110, the diameters of the surface PI of which are PH and the cross-sectional surface areas PP.
  • the mantle 106 of the frame 104 of the attenuator 102 installed in the duct 300 presses sufficiently tightly against the inner surface 312 of the duct 300, so that the attenuator 102 stays in place in the duct 300 and prevents an air flow IL between the mantle 106 and the inner surface 312, when the attenuator 102 to be installed is manufactured so that at least its diameter PH is larger than the diameter SH of the inner surface 312 of the duct 300.
  • the diameter PH of the attenuator 102 is e.g. 1-3 mm larger than the diameter SH of the inner surface 312 of the channel 300.
  • the size of the diameter PH is 64-318 mm, for example 64, 81, 101, 126, 161, 201, 252 and 318 mm, but the attenuator 102 can also be manufactured in other dimensions, depending on the diameter SH of the duct 300.
  • the depth SY of the attenuator 102 in turn is 25-75 mm, e.g. 25, 50 or 75 mm.
  • the attenuator 102 is installed in the duct 300 by pushing it from the open end of the duct 300, whereby the manufacturing material of the attenuator 102 expands and presses into place in the duct 300 against its inner surface 312.
  • the attenuator 102 stays in place (fixed) in the channel 300 with the aid of friction without separate fasteners.
  • the frame 104 has flow openings (ducts) 114 in the direction (depth, height, length direction) of its mantle 106, the purpose of which openings is to allow air flow IL to flow through the attenuator 102 installed in the duct 300 in a controlled manner from the end 108 into the mantle 106 and from the end 110 out of the mantle 104.
  • flow openings ducts
  • the frame 104 has flow openings (ducts) 114 in the direction (depth, height, length direction) of its mantle 106, the purpose of which openings is to allow air flow IL to flow through the attenuator 102 installed in the duct 300 in a controlled manner from the end 108 into the mantle 106 and from the end 110 out of the mantle 104.
  • three, four, in accordance with the figures five, six or more openings 114 have been formed in the frame 104.
  • the openings 114 can be formed in the attenuator 102 in different shapes, e.g. in accordance with the figures with elliptical (oval) or circular shaped cross-sections. Alternatively, or additionally, openings 114 can be formed in the attenuator 102 in different sizes (dimensions), whereby their cross-sectional area AP varies.
  • the openings 114 in the attenuator 102 have, in accordance to the figures, the same shape and size, or alternatively, the shape, size or both of at least one opening 114 differs from the other openings 114 in the attenuator 102.
  • the length of the openings 114 corresponds to the depth SY of the attenuator 102.
  • the openings 114 are formed in the frame 104 at suitable distances from each other and their position in the frame 104 depends on their shape, size, number and possible shape and size differences of the openings 114. It is possible to place the openings 114 symmetrically and evenly in relation to the central axis KE passing through the central points KP of the ends 108, 110 of the frame 104, e.g. as in the figures.
  • the attenuator 102 additionally has at least one adjusting plug 116, each of which plugs 116 is meant to close one of the openings 114 of the frame 104 and to prevent the air flow IL from flowing through the attenuator 102 through the closed opening 114 in question.
  • each attached plug 116 can also be detached in order to open the opening 114.
  • At least one plug 116 is additionally meant to guide the air flow IL to flow through the attenuator 102 via at least one opening 114 left open.
  • each plug 116 corresponds to the shape and size of the cross-sectional surface area AP of the opening 114 meant for it, so that the plug 116 can be fitted in the opening 114 sufficiently tightly in order to close it, and if necessary, it can be detached in order to open the opening 114.
  • the length of the at least one plug 116 corresponds to the depth SY of the attenuator 102 as well as of the openings 114.
  • the amount of air flow IL flowing through the attenuator 102 installed in the duct 300 is smaller by closing a desired number of the openings 114, i.e. by fitting a plug 116 in each of the openings 114 to be closed, so that at least one of the openings 114 remains open, whereby the air flow IL is guided through the at least one opening 114 which remained open, with a cross-sectional surface shape size AP, from the side of the end 108 of the attenuator 102 to the side of the end 110.
  • the frame 104 can in addition to the openings 114 have at least one flow cut (not shown in the figures) in the direction of the mantle 106 shaped in the surface of the mantle 106, so that the shape and size of the flow opening achieved by each cut is determined by the inner surface 312 of the duct 300 and the surface (outer surface) of the mantle 106.
  • the at least one cut is not meant to be closed, but it is meant to always be open and to allow the air flow IL to flow through the attenuator 102 installed in the duct 300 in a controlled manner between the surface of its mantle 106 and the inner surface 312 from the end 108 to the end 110.
  • the at least one cut comprises e.g. one or two cuts.
  • the frame 104 has, in addition to the openings 114, a measuring coupling 118 in the direction of the depth direction of the mantle 106, penetrating the frame 104, into which measuring coupling a measuring pipe needed for measuring a pressure difference between the ends 108, 110 can be installed.
  • the measuring coupling 118 can be closed with its own plug 119 in accordance with the figures.
  • the attenuator 102 is manufactured so that the angle TV between the surface PI formed by the end 108 of the frame 104, meant to be against incoming air flow IL, and the mantle 106, and the angle PV between the surface PI formed by the end 110, meant to be in the direction of the exiting air flow IL, and the mantle 106 are sharp, under 90 degree angles TV, PV, whereby a narrowing KA is formed in the frame 104 (mantle 106), in the middle part when seen in the depth direction.
  • the diameter VH of the cross-sectional surface of the middle part is by the narrowest part of the frame 104, in the middle part in the depth direction of the attenuator 102, smaller than the diameters PH of the surfaces PI formed by the ends 108, 110, in order to improve the pressing of the mantle 106 against the inner surface 312 of the duct 300.
  • the diameters PH of the surfaces PI of the ends 108, 110 are 2-3 mm larger than the narrowed diameter VH of the middle part of the frame 104, so that the attenuator 102 has the shape of a cylinder pressed at the middle.
  • the diameters PH of the ends 108, 110 are 1-3 mm larger and the diameter VH of the narrowest point of the frame 104 is in turn 0-1 mm smaller than the diameter SH of the duct 300, into which the attenuator 102 is intended.
  • the sharp supply and exhaust end edges 120, 122 formed by the angles TV, PV of the attenuator 102 push against the inner surface 312 of the duct 300 equipped with a threaded seam 324 and the inner surface 326 of the grooves formed by the threaded seams 324 on the inner surface 312 regardless of the manufacturer of the duct 300, so that the air flow IL cannot flow uncontrollably between the mantle 106 of the attenuator 102 and the inner surface 312 along the threaded seam 324 regardless of the manufacturer of the duct 300.
  • the frame 104 of the attenuator 102 installed in the duct 300 retains its shape, so that the openings 114 are not compressed, simultaneously reducing their cross-sectional surface area AP and the amount of air flow IL flowing through.
  • the frame 104 of the attenuator 102 and each plug 116 are manufactured using as manufacturing material an open-cell groat pressed foam, in order to support their, and the especially the frame's 104, structure and improve the sound attenuation.
  • the end 108 of the frame 104, i.e. surface PI, and the supply air end 126 toward the supply air of each plug 116 manufactured from groat pressed foam are in the supply air direction coated with a polyethylene plastic film 128, 130 in order to prevent flow through of an air flow IL outside the openings 114.
  • the attenuator 102 is manufactured using shape cutting (die cutting), where the manufacturing material to be used for manufacturing the attenuator 102 is installed in a shape cutter (cutting tool, die cutter) and the shape cutter is used to cut with the aid of a mold the manufacturing material in the shape of an attenuator 102 equipped with a sharp-edged 120, 122 frame 104 and plugs 116 which can be detached therefrom.
  • shape cutting die cutting
  • the dimensions of the attenuator 102 are as desired, in contrast to cutting occurring with the aid of a water jet, where the water jet bends so, that the cross-sectional surface area PP of one end 110 is larger than the other end 108.
  • Fig. 2a-2c show an attenuator 102 corresponding to the previous figures with regards to its manufacturing, shape, dimensions and function, which can be installed in a duct 300 equipped with a threaded seam 324, which attenuator differs from the others only with regards to its layered three-layer structure 232, 234, 236.
  • the three-layer structure of the frame 104 and each plug 116 of the attenuator 102 of the figures is manufactured from polyester fibre layers 232, 234 in the ends 108, 110 and a groat pressed foam layer 236 glued between them, so that the layer structure 232, 234, 236 of the frame 104 and each plug 116 is intended to improve the sound attenuation and reduce sound production cause by the air flow IL.
  • the thickness of the fibre layers 232, 234 is 10-25 mm, e.g. 10, 15, 20 or 25 mm, and the foam layer 236 is 20-50 mm, e.g. 20, 35 or 50 mm, in the three-layer structure 232, 234, 236.
  • Fig. 2d shows an attenuator 102 corresponding to the previous figures, which differs from the attenuators 102 of the previous figures only with regards to its two-layer structure 234, 236.
  • the two-layer structure of the frame 104 and each plug 116 of the attenuator 102 of the figure is manufactured from a groat pressed foam layer 236 and a polyester fibre layer 234 glued together, to the end 110 of which a polyester fibre fabric 237 has been attached with heat processing to prevent the polyester fibre layer 234 from tearing due to the air flow IL of the attenuator 102.
  • the thickness of the foam layer 236 is e.g. 50-65 mm, e.g. 50, 55, 60 or 65 mm, and the fibre layer 234 is e.g. 10-25 mm, e.g. 10, 15, 20 or 25 mm, in the two-layer structure 234, 236.
  • a plastic film 128, 130 does not need to be used in the attenuator 102 in the ends 108, 126 of the frame 104 and each plug 116 on the supply air IL side, but in the two-layer structure 234, 236, a plastic film 128, 130 is used on top of the foam layer 236.
  • FIG. 3 shows the cross-section of a threaded seam duct 300 and a therein installed attenuator 102 manufactured completely from groat pressed foam.
  • the air flow IL comes into the duct 300 installed in the structure 338, through openings 342 in a front grill (air, cover plate) 340 installed in front of it.
  • a front grill air, cover plate
  • four openings 114 have been closed with plugs 116 and only the center opening 114 has been left open, along which the air flow IL can move through the attenuator 102 onward in the duct 300.
  • the mantle 106 of the frame 104 remains at its narrowest middle part about 0.5 mm apart from the duct 300 and starts to press against the inner surface 312 the harder, the closer we get to the ends 108, 110, whereby the sharp edges 120, 122 push while pressing against the threaded seam 324 against its inner surface 326, so that the air flow IL cannot push past the attenuator 102 along the threaded seam 324 between the mantle 106 and the inner surface 312.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Air-Flow Control Members (AREA)
  • Duct Arrangements (AREA)

Claims (11)

  1. Atténuateur (102) conçu pour être installé dans un conduit de climatization (300), comprenant
    un cadre cylindrique (104),
    des ouvertures d'écoulement (114) dans la direction d'un manteau (106) du cadre, et
    au moins un bouchon de réglage (116),
    où le cadre est fabriqué à partir d'un matériau poreux, insonorisant et flexible de sorte que le manteau de l'atténuateur installé appuie contre une surface interne (312) du conduit de climatisation,
    où la forme en coupe transversale et les dimensions de l'au moins un bouchon de réglage correspondent à une ouverture d'écoulement correspondante (114) de sorte que l'au moins un bouchon de réglage peut être installé dans l'ouverture d'écoulement correspondante afin de régler la quantité d'écoulement d'air dans le conduit de climatisation,
    caractérisé en ce qu'un angle (TV) entre une surface (PI) formée par une extrémité d'air d'alimentation (108) de l'atténuateur et le manteau, et un angle (PV) entre une surface (PI) formée par une extrémité d'air d'évacuation (110) de l'atténuateur et le manteau sont des angles aigus (TV, PV) réalisant un rétrécissement (KA) d'une partie centrale du cadre, où le diameter (VH) d'une section transversale de l'atténuateur est inférieur aux diamètres (PH) des surfaces (PI) formées par l'extrémité d'air d'alimentation et l'extrémité d'air d'évacuation afin d'améliorer la pression du manteau contre la surface interne du conduit de climatisation.
  2. Atténuateur selon la revendication précédente, dans lequel les diamètres des extrémités d'air d'alimentation et d'évacuation (108, 110) de l'atténuateur sont 2 à 3 mm plus grands qu'un diamètre du rétrécissement au niveau de la partie centrale de l'atténuateur de sorte que l'atténuateur a une forme de cylindre comprimé au milieu.
  3. Atténuateur selon l'une quelconque des revendications précédentes, dans lequel un matériau de fabrication du cadre et de l'au moins un bouchon de réglage comprend de la mousse compressée à grains ouverts afin de soutenir une structure du cadre et d'améliorer l'atténuation acoustique.
  4. Atténuateur selon la revendication 3, lequel est fabriqué entièrement à partir de mousse compressée grossièrement de sorte que les extrémités (108, 126) du cadre et l'au moins un bouchon de réglage sont dans une direction d'air d'alimentation recouverte d'un film plastique en polyéthylène (128, 130) afin d'empêcher l'écoulement de l'air en dehors des ouvertures d'écoulement.
  5. Atténuateur selon la revendication 3, lequel est fabriqué à partir d'une structure à trois couches (232, 234, 236) formée de couches de fibres de polyester (232, 234) et d'une couche de mousse compressée grossièrement (236) entre elles de sorte que le cadre et l'au moins un bouchon de réglage sont constitués de la structure à trois couches afin d'améliorer l'atténuation sonore et de réduire la production sonore.
  6. Atténuateur selon la revendication 3, lequel est fabriqué à partir d'une structure à deux couches (234, 236) formée à partir d'une couche de fibres de polyester (234) et d'une couche de mousse compressée grossièrement (236) de sorte que le cadre et l'au moins un bouchon de réglage sont fabriqués à partir d'une structure à deux couches afin d'améliorer l'atténuation sonore et de réduire la production sonore.
  7. Atténuateur selon la revendication 6, dans lequel les surfaces de la couche de mousse, éloignées de la couche de fibres de polyester, des extrémités d'air d'alimentation (108, 126) du cadre et de l'au moins un bouchon de réglage sont revêtues d'un film plastique en polyethylene (128, 130) afin d'empêcher l'écoulement de l'air en dehors des ouvertures d'écoulement.
  8. Atténuateur selon la revendication 7, dans lequel les surfaces de la couche de fibres de polyester, éloignées de la couche de mousse, des extrémités d'air d'évacuation (110) du cadre et de l'au moins un bouchon de réglage sont revêtues d'un tissu en fibres de polyester (237) afin de renforcer la couche de fibres de polyester.
  9. Atténuateur selon l'une quelconque des revendications précédentes, qui comprend, outre les ouvertures d'écoulement, un raccord de mesure (118) dans la direction du manteau et pénétrant dans l'atténuateur, dans lequel peut être installé un tuyau de mesure nécessaire à la mesure d'une différence de pression et qui peut être fermé par un bouchon (119) installé à l'intérieur.
  10. Atténuateur selon l'une quelconque des revendications précédentes, dans lequel les sections transversales des ouvertures d'écoulement et de l'au moins un bouchon de réglage ont une forme elliptique.
  11. Procédé de fabrication pour fabriquer un atténuateur (102) selon l'une quelconque des revendications précédentes, comprenant au moins les étapes suivantes consistant à installer un matériau de fabrication dans un outil de découpe de forme et
    presser, par l'outil de découpe de forme, le matériau de fabrication à l'aide d'un moule afin qu'il prenne la forme de l'atténuateur de sorte que le rétrécissement (KA) est formé dans la partie centrale du cadre (104), où le diameter (VH) de la section transversale de l'atténuateur est inférieure aux diamètres (PH) des surfaces (PI) formées par l'extrémité d'air d'alimentation (108) et l'extrémité d'air d'évacuation (110).
EP22179396.1A 2021-06-24 2022-06-16 Atténuateur pour le conduit d'air conditionné et le procédé de sa production Active EP4109008B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20215755A FI129767B (fi) 2021-06-24 2021-06-24 Ilmanvaihtokanavaan asennettava vaimennin

Publications (3)

Publication Number Publication Date
EP4109008A1 EP4109008A1 (fr) 2022-12-28
EP4109008B1 true EP4109008B1 (fr) 2024-03-06
EP4109008C0 EP4109008C0 (fr) 2024-03-06

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Application Number Title Priority Date Filing Date
EP22179396.1A Active EP4109008B1 (fr) 2021-06-24 2022-06-16 Atténuateur pour le conduit d'air conditionné et le procédé de sa production

Country Status (3)

Country Link
EP (1) EP4109008B1 (fr)
FI (1) FI129767B (fr)
PL (1) PL4109008T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2631482A (en) * 2023-06-30 2025-01-08 Fish Innovation Ltd Noise attenuator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115794B (fi) 1999-11-05 2005-07-15 Jeven Oy Ilmanvaihtokanavan vaimennin
SE518776C2 (sv) 2001-03-08 2002-11-19 Jerry Borander Reglerspjäll
SE525746C2 (sv) * 2002-05-13 2005-04-19 Flaekt Woods Ab Anordning för deplacerande ventilation innefattande en moduluppbyggd stomme med ryggparti och stödplan för uppbärande av filterhusmoduler
JP2008303662A (ja) 2007-06-11 2008-12-18 Mk Seiko Co Ltd 消音器

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FI20215755A1 (fi) 2022-08-15
FI129767B (fi) 2022-08-15
PL4109008T3 (pl) 2024-06-24
EP4109008A1 (fr) 2022-12-28
EP4109008C0 (fr) 2024-03-06

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