GB1502355A - Soundattenuating devices for silencing gaseous flow in ducting - Google Patents
Soundattenuating devices for silencing gaseous flow in ductingInfo
- Publication number
- GB1502355A GB1502355A GB3819075A GB3819075A GB1502355A GB 1502355 A GB1502355 A GB 1502355A GB 3819075 A GB3819075 A GB 3819075A GB 3819075 A GB3819075 A GB 3819075A GB 1502355 A GB1502355 A GB 1502355A
- Authority
- GB
- United Kingdom
- Prior art keywords
- duct
- baffle
- baffle element
- elements
- baffle elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pipe Accessories (AREA)
Abstract
1502355 Sound attenuation in ducts LICENCIA TALALMANYOKAT ERTEKESITO VALLALAT 17 Sept 1975 [18 Sept 1974] 38190/75 Heading F1B [Also in Divisions F3-4] A sound attenuating device comprises a non- straight duct 1 in which at least one baffle element 3 is located at a region where in use fluid flowing through the duct changes direction, the or each baffle element having a thickness of from 2 to 10 cm. and, where there is a plurality of baffle elements, they do not occupy more than 30% of the total cross-sectional area of the duct, the or each baffle element being arcuate with one curved surface imperforate and the other at least partially perforated and containing sound absorbent material. Preferably, the total thickness of the baffle elements does not exceed 30% of the total width of the duct. The baffle elements are preferably asymmetrically arranged in the duct with respect to the centre line thereof and the upstream and downstream tips of the baffle elements may lie in planes which are not parallel to one another. At least one baffle element may have a reduced curvature adjacent either its upstream or downstream end.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HUSA002694 | 1974-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1502355A true GB1502355A (en) | 1978-03-01 |
Family
ID=11001267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3819075A Expired GB1502355A (en) | 1974-09-18 | 1975-09-17 | Soundattenuating devices for silencing gaseous flow in ducting |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1502355A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0133253A2 (en) * | 1983-07-23 | 1985-02-20 | ROGAL Gesellschaft für angewandte Lufttechnik mbH | Guide vane for the deflection of a fluid flow |
GB2170861A (en) * | 1985-02-08 | 1986-08-13 | Colchester Woods | Air duct silencer splitter |
EP1495885A3 (en) * | 2003-07-09 | 2006-01-25 | REHAU AG + Co | Air conduit for automotive vehicle |
GB2457298A (en) * | 2008-02-09 | 2009-08-12 | Owen Ronald Clingan | Ventilation system having one or more baffles mounted in a duct to attenuate sound |
CN108344099A (en) * | 2018-04-20 | 2018-07-31 | 珠海格力电器股份有限公司 | Air conditioning apparatus |
-
1975
- 1975-09-17 GB GB3819075A patent/GB1502355A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0133253A2 (en) * | 1983-07-23 | 1985-02-20 | ROGAL Gesellschaft für angewandte Lufttechnik mbH | Guide vane for the deflection of a fluid flow |
EP0133253A3 (en) * | 1983-07-23 | 1986-09-17 | Robertson Gal Gesellschaft Fur Angewandte Lufttechnik Mbh | Guide vane for the deflection of a fluid flow |
GB2170861A (en) * | 1985-02-08 | 1986-08-13 | Colchester Woods | Air duct silencer splitter |
EP1495885A3 (en) * | 2003-07-09 | 2006-01-25 | REHAU AG + Co | Air conduit for automotive vehicle |
GB2457298A (en) * | 2008-02-09 | 2009-08-12 | Owen Ronald Clingan | Ventilation system having one or more baffles mounted in a duct to attenuate sound |
CN108344099A (en) * | 2018-04-20 | 2018-07-31 | 珠海格力电器股份有限公司 | Air conditioning apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |