WO2000058659A1 - Muffler lining for air or gas channels - Google Patents
Muffler lining for air or gas channels Download PDFInfo
- Publication number
- WO2000058659A1 WO2000058659A1 PCT/SE2000/000561 SE0000561W WO0058659A1 WO 2000058659 A1 WO2000058659 A1 WO 2000058659A1 SE 0000561 W SE0000561 W SE 0000561W WO 0058659 A1 WO0058659 A1 WO 0058659A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- muffler
- air
- lining
- lamellae
- lining according
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/033—Noise absorbers
-
- 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 muffler lining for air or gas channels, which is arranged for being mounted, with good sealing, in a closed outer casing of sheet metal, plastic or another stiff material thereby forming a complete muffler, whereupon said complete muffler can be mounted as an interconnection part between air or gas channel parts
- Mufflers or sound absorbers for air or gas channels are known in many various designs
- a usual type of sound absorber for air or gas channels comprises an inner, perforated sheet metal tube, round which a muffler mat has been mounted, sometimes with a blocking layer round the muffler mat, and in which the unit comprising the sheet metal tube, the eventually existing blocking layer and the muffler mat has been enclosed in an outer tube
- the said type of muffler involves the disadvantage that the inner sheet metal tube pro ⁇ uced a non-desired sound of its own
- the said type of muffler also does not provide a particularly good damping of sound in the lower sound frequency areas Often sound in the low frequency and medium frequency areas are the most disturbing sounds for the ambient and the sound, which is most desirable to dampen as effectively as possible.
- Another type of muffler is formed with a muffler element in the form of a semi cylinder shaped tubular shell of mineral wool which is exteriorly surrounded by a sheet metal layer, and in which two pieces of muffler elements which have been joined to each other provides a complete muffler together with the sheet metal layers
- a muffler of this type can leak air or gas in the joint between the two semi cylinder shaped units, and the manufacture of the muffler comprising the two semi tubular shells and the sheet metal layer is expensive, in particular since the muffler units have to be manufactured in several specific dimensions adapted to match the dimensions of the air or gas channels
- the said priorly known muffler further involves the serious disadvantage that it is normally not possible to perform a cleaning and scraping off dust and other particles therefrom, which dust and particles irrevocably stick to the inner surface of the inner muffler element. From health viewpoint it is important that dust and other particles which have stuck to the muffler and to the air/gas channel is removed at frequent intervals, so that said dust or particles is not blown out into the room in which humans or animals stay.
- the present invention therefore is intended to solve the disadvantages and lacks in priorly known mufflers for air or gas channels and to provide a muffler liner
- the muffler lining can simply be manufactured with any desired dimension (length and diameter) and with any desired cross section shape (e.g. circular, elliptic, polygonal), - which can easily be adapted to any dimension of air or gas channels,
- the muffler comprises a lining which is composed of
- figure 1 shows an example of a muffler which, as known in the art, is mounted as an intermediate part between two spaced channel pieces.
- Figure 2 shows a vertical cross section through a muffler according to the invention, as seen along line ll-ll of figure 1.
- Figure 3 illustrates a stage in the method of manufacture of an inner lining part of the muffler according to the invention.
- Figure 4 shows a ready inner lining part in a perspective view, and figure 5 shows a complete muffler lining according to the invention before said muffler lining has been enclosed in an outer casing of sheet metal, plastic of a corresponding material.
- the muffler according to the invention comprises a inner muffler element 1 which at the interior thereof carries a relatively thin sound dampening inner layer 2, and an outer muffler element 3 of a sound dampening material, for instance mineral wool, which material entirely, and with good contact between the units, encloses the muffler element 1 , and in which the unit of inner muffler element 1 , inner layer 2 and outer muffler element 3 is enclosed, as conventional, in an outer casing 4 of sheet metal, plastic, or a similar material.
- Said casing is formed with transverse ends 5 and tube studs 6 connected thereto for sealingly mounting of channel parts 7 thereto.
- the tube studs 6 preferably are formed with inwards to the inner of the muffler element facing short tube pieces 6a which keep the muffler lining together and prevents a collapsing thereof.
- the muffler lining can, for the same purpose, be formed with separate short tube pieces at its ends.
- the inner muffler element 1 is made as a plain unit consisting of several lamellae 8 of a sound dampening material having the desired sound dampening properties, for instance mineral wool of a predetermined density giving an optimum sound dampening.
- the lamellae 8 have a total width which is adapted so that a ready, closed inner element 1 , as shown in figure 4, forms a substantially closed unit, which can be circular cylindrical, as shown in the figures, or which can have an oval, elliptical, polygonal or any other cross section shape.
- the inner muffler element 1 made of the lamellae 8 can have a thickness of e.g. between 9 and 20 mm and a lamellae width of 60-75 mm.
- the lamellae should be of such width that the risk that the inner element 1 collapses inside the muffler is eliminated.
- tube studs at the ends of the muffler extends some distance into the inner of the muffler element 2 with stud pieces 6a, or that the muffler, at each end thereof, has a short inner ring which prevents the lamellae 8 from collapsing inwardly in the muffler.
- the lamellae are secured to a plain inner layer 2 which can be an air pervious material which preferably also is of a type which can give a certain contribution to the sound dampening, for instance a glass fibre fabric having a volume weight of more than 100 g/m 2 , and which has a high tensile and tear resistance for enabling a frequent brushing and cleaning of the muffler, even by means of mechanical means like scrapers and brushes, without damaging the inner layer 2, and without scraping of brushing up the inner layer and without releasing particles of said inner layer.
- a plain inner layer 2 which can be an air pervious material which preferably also is of a type which can give a certain contribution to the sound dampening, for instance a glass fibre fabric having a volume weight of more than 100 g/m 2 , and which has a high tensile and tear resistance for enabling a frequent brushing and cleaning of the muffler, even by means of mechanical means like scrapers and brushes, without damaging the inner layer 2, and without scraping of brushing
- the lamellae 8 are applied by being sewed, by being glued or by being fixed to the inner layer 1 in a corresponding way.
- the inner layer 2 is preferably wider than the combined width of the lamellae 8 and it is used for interconnecting the ends of the muffler element in that the projecting ends 9 of the inner layer 8 are pulled radially outwards some distance outside the end lamellae so that said projecting end pieces 9 can be stitched together thereby keeping the longitudinal ends of the inner element together after the inner element 1 has been fold in to form a closed unit.
- the inner layer 1 closes the unit of inner layer 1 and lamellae together in this way to form a well closed unit.
- the element 2, 8 is fold round with the lamellae 8 facing outwards, whereby there appear V-shaped slots 10 between the longitudinal edges of the lamellae, whereas the inner edges are in direct contact with each other.
- the inner element 1 and thereby the entire muffler, can be formed with any other cross section shape than circular cylindrical, for instance with oval, polygonal like square (4), hexagonal (6) etc. cross section shape for adapting the muffler to the shape and the function of available air/gas channels.
- the inner element 1-2 is enclosed in an outer muffler element 3 which can be two semi tube shells, or still better a complete, slotted 11 tube shell.
- the slot 11 of the tube shell 3 preferably is located midway of a lamella 8 for eliminating the risk that eventually occurring fire is spread through the air/gas channels.
- the entire muffler lining comprising the inner muffler element 1 comprising the inner layer 2 and the lamellae 8, and the outer muffler element 3 is now enclosed in an outer casing 4 which can be of sheet metal, plastic or any other stiff material, and which has cross ends 6 which can carry tube studs 6 for connection of the muffler to cross cut ends 7 of the air/gas channel.
- said tube studs 6 can have a short ring 6a extending inwards in the muffler element and which keeps the inner layer 1 held outwards thereby preventing a collapsing thereof.
- the muffler can repeatedly be cleaned and can be released from dust and other particles which are collected on the inner layer, and this can be done without having the cleaning scraper stick to the joint of the inner layer, and without having parts of mineral wool or any other dampening material becoming brushed or scraped off.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Silencers (AREA)
- Pipe Accessories (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00921235A EP1166009A1 (en) | 1999-03-26 | 2000-03-22 | Muffler lining for air or gas channels |
EEP200100497A EE04385B1 (en) | 1999-03-26 | 2000-03-22 | Muffler liner for air or gas ducts |
PL00351440A PL194488B1 (en) | 1999-03-26 | 2000-03-22 | Lining of an air gas ducting silencer |
AU41573/00A AU4157300A (en) | 1999-03-26 | 2000-03-22 | Muffler lining for air or gas channels |
NO20014578A NO320910B1 (en) | 1999-03-26 | 2001-09-20 | Silencer lining for air or gas ducts |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9901124-9 | 1999-03-26 | ||
SE9901124A SE516302C2 (en) | 1999-03-26 | 1999-03-26 | Silencer insert for air or gas ducts |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000058659A1 true WO2000058659A1 (en) | 2000-10-05 |
Family
ID=20415030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2000/000561 WO2000058659A1 (en) | 1999-03-26 | 2000-03-22 | Muffler lining for air or gas channels |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1166009A1 (en) |
AU (1) | AU4157300A (en) |
EE (1) | EE04385B1 (en) |
NO (1) | NO320910B1 (en) |
PL (1) | PL194488B1 (en) |
SE (1) | SE516302C2 (en) |
WO (1) | WO2000058659A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE525044C2 (en) * | 2002-02-28 | 2004-11-16 | Vasab Vaegg & Akustik System A | Ventilation duct comprising sound attenuating materials of different densities and dampers with perforated blade |
CN107702315A (en) * | 2017-09-30 | 2018-02-16 | 苏州蓝邦环保科技有限公司 | Muffling air duct |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3540547A (en) * | 1968-12-31 | 1970-11-17 | Charles Waddell Coward Jr | Acoustical systems for air moving devices |
GB1442190A (en) * | 1972-11-04 | 1976-07-07 | Ferroplast Gmbh | Sound-damping device for use on |
US4408679A (en) * | 1981-09-28 | 1983-10-11 | Peabody Spunstrand, Inc. | Sound attenuator |
EP0165145A1 (en) * | 1984-05-18 | 1985-12-18 | CHARBONNAGES DE FRANCE, Etablissement public dit: | Fan silencer which can be regenerated in situ, for use in ventilation plants fed with dusty air, and process to regenerate this silencer in situ |
DE3810364A1 (en) * | 1988-03-26 | 1989-10-05 | Oldorid Vertriebsgesellschaft | Insulating and filling material for underground sound absorbers |
DE4429045A1 (en) * | 1994-08-16 | 1996-02-22 | Missel Gmbh & Co E | Insulation material |
WO1999008038A1 (en) * | 1997-08-08 | 1999-02-18 | Shishiai-Kabushikigaisha | Sound insulation member |
-
1999
- 1999-03-26 SE SE9901124A patent/SE516302C2/en not_active IP Right Cessation
-
2000
- 2000-03-22 PL PL00351440A patent/PL194488B1/en not_active IP Right Cessation
- 2000-03-22 AU AU41573/00A patent/AU4157300A/en not_active Abandoned
- 2000-03-22 EE EEP200100497A patent/EE04385B1/en not_active IP Right Cessation
- 2000-03-22 WO PCT/SE2000/000561 patent/WO2000058659A1/en not_active Application Discontinuation
- 2000-03-22 EP EP00921235A patent/EP1166009A1/en not_active Withdrawn
-
2001
- 2001-09-20 NO NO20014578A patent/NO320910B1/en not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3540547A (en) * | 1968-12-31 | 1970-11-17 | Charles Waddell Coward Jr | Acoustical systems for air moving devices |
GB1442190A (en) * | 1972-11-04 | 1976-07-07 | Ferroplast Gmbh | Sound-damping device for use on |
US4408679A (en) * | 1981-09-28 | 1983-10-11 | Peabody Spunstrand, Inc. | Sound attenuator |
EP0165145A1 (en) * | 1984-05-18 | 1985-12-18 | CHARBONNAGES DE FRANCE, Etablissement public dit: | Fan silencer which can be regenerated in situ, for use in ventilation plants fed with dusty air, and process to regenerate this silencer in situ |
DE3810364A1 (en) * | 1988-03-26 | 1989-10-05 | Oldorid Vertriebsgesellschaft | Insulating and filling material for underground sound absorbers |
DE4429045A1 (en) * | 1994-08-16 | 1996-02-22 | Missel Gmbh & Co E | Insulation material |
WO1999008038A1 (en) * | 1997-08-08 | 1999-02-18 | Shishiai-Kabushikigaisha | Sound insulation member |
Also Published As
Publication number | Publication date |
---|---|
AU4157300A (en) | 2000-10-16 |
EE04385B1 (en) | 2004-10-15 |
SE9901124L (en) | 2000-09-27 |
NO20014578D0 (en) | 2001-09-20 |
EP1166009A1 (en) | 2002-01-02 |
NO20014578L (en) | 2001-09-20 |
NO320910B1 (en) | 2006-02-13 |
SE516302C2 (en) | 2001-12-17 |
PL351440A1 (en) | 2003-04-22 |
SE9901124D0 (en) | 1999-03-26 |
EE200100497A (en) | 2002-12-16 |
PL194488B1 (en) | 2007-06-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10425714B2 (en) | Ear bud or dome | |
JP4607175B2 (en) | Intake air filter for automobile internal combustion engine | |
EP1356193B1 (en) | Apparatus for improved noise attenuation in a dissipative internal combustion engine exhaust muffler | |
US2125850A (en) | Vacuum cleaner muffler | |
US5992560A (en) | Muffler for internal combustion engine | |
JP3242931B2 (en) | Λ / 4 absorber with variable bandwidth | |
RU2001124817A (en) | DENTAL BRUSH HEAD WITH FLEXIBLE INSTALLED BRUSHES | |
KR100294471B1 (en) | Flexible Tubes for Automobile Exhaust Pipes | |
RU2003111978A (en) | DUST FIGHTING DEVICE FOR CYCLONE TYPE FOR VACUUM CLEANER | |
JPS60232799A (en) | Earwax protecting device of hearing aid | |
EP1166009A1 (en) | Muffler lining for air or gas channels | |
CN106705220A (en) | Indoor unit and outdoor unit of air conditioner, and air conditioner noise reduction device thereof | |
KR970027829A (en) | Pulse damper or acoustic discharge for compressor and compressor with it | |
FI91995B (en) | Absorptive silencer, especially for air ducts in paper mills | |
WO1997009864A1 (en) | Hearing aid with wax guard | |
AU755780B2 (en) | Hose | |
US6241043B1 (en) | Muffler insert and process for the production thereof | |
US1841347A (en) | Air filtering and cleaning device | |
JP2008157573A (en) | Rotary cleaning body for air conditioner, and air conditioner | |
JP2007203252A (en) | Filter for ventilation opening | |
JP4975316B2 (en) | Duct parts and duct structure | |
US3426866A (en) | Muffler for downspouts and muffled downspout | |
KR970003862B1 (en) | Method of drainage of soil and pipe for drainage of soil | |
EP0165145B1 (en) | Fan silencer which can be regenerated in situ, for use in ventilation plants fed with dusty air, and process to regenerate this silencer in situ | |
JP4574896B2 (en) | Exhaust silencer manufacturing method and exhaust silencer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AL AM AT AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ CZ DE DE DK DK DM EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2000921235 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2000921235 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2000921235 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |