GB1369524A - Acoustically damping gas flow ducts - Google Patents
Acoustically damping gas flow ductsInfo
- Publication number
- GB1369524A GB1369524A GB5289972A GB5289972A GB1369524A GB 1369524 A GB1369524 A GB 1369524A GB 5289972 A GB5289972 A GB 5289972A GB 5289972 A GB5289972 A GB 5289972A GB 1369524 A GB1369524 A GB 1369524A
- Authority
- GB
- United Kingdom
- Prior art keywords
- baffles
- duct
- gas
- pipe
- shows
- 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
- 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)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Duct Arrangements (AREA)
- Exhaust Silencers (AREA)
- Building Environments (AREA)
Abstract
1369524 Exhaust silencers U GRAJECKI 16 Nov 1972 [26 Nov 1971] 52899/72 Heading F1B A gas duct is made of acoustically absorbing material and has a gas inlet and a gas outlet, between which are baffle walls which increase the length of the flow path of the gas and cause multiple reflection of sound waves until they are oriented oppositely to incident acoustic waves. the duct walls and the baffles comprising a material having a density of at least 2gm/cu. cm and the ratio of reflected acoustic energy to incident acoustic energy being less than 0À05. Fig. 4 shows angle plates 9 positioned in a duct 1 and indicates the multiple reflection of sound waves 10 between the baffles, so that some of the waves are finally travelling in the opposite direction to that in which they entered the duct. Fig. 5 shows an alternative arrangement of baffles 5 and 7 Figs. 6 and 7 (not shown) illustrate arrangements of baffles in a curved duct. Fig. 8 (not shown) shows a circular section pipe having radially inwardly projecting baffles attached to the internal wall of the pipe so that the gas flow follows a helical path. There may also be a baffle plate mounted at the axis of the pipe and extending diametrally part-way across the pipe.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712158702 DE2158702C3 (en) | 1971-11-26 | 1971-11-26 | Soundproof gas lock |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1369524A true GB1369524A (en) | 1974-10-09 |
Family
ID=5826240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5289972A Expired GB1369524A (en) | 1971-11-26 | 1972-11-16 | Acoustically damping gas flow ducts |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE791722A (en) |
DE (1) | DE2158702C3 (en) |
FR (1) | FR2163047A5 (en) |
GB (1) | GB1369524A (en) |
NL (1) | NL7215861A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0027315A1 (en) * | 1979-10-10 | 1981-04-22 | Caterpillar Tractor Co. | Machinery with noise suppression screen |
NO20074803L (en) * | 2005-03-18 | 2007-09-20 | Tumane Entpr Ltd | Device for sound attenuation of flow channel |
CN104101067A (en) * | 2014-07-08 | 2014-10-15 | 长兴百叶龙演出有限公司 | Air outlet device of air conditioner in theater |
CN104421221A (en) * | 2013-09-11 | 2015-03-18 | 珠海格力电器股份有限公司 | Silencer assembly and fan coil |
CN104456905A (en) * | 2013-09-25 | 2015-03-25 | 珠海格力电器股份有限公司 | Silencing structure of air conditioner and air conditioner |
CN104564248A (en) * | 2014-12-31 | 2015-04-29 | 杭州纯化科技有限公司 | Special bent pipe disturber for DPF low-temperature regeneration igniter of diesel engine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4069768A (en) * | 1975-05-28 | 1978-01-24 | Bridgestone Tire Company Limited | Device for controlling a propagation direction of noise |
CN217822073U (en) * | 2022-06-30 | 2022-11-15 | 阳光电源股份有限公司 | Amortization subassembly and new forms of energy equipment |
-
0
- BE BE791722D patent/BE791722A/en unknown
-
1971
- 1971-11-26 DE DE19712158702 patent/DE2158702C3/en not_active Expired
-
1972
- 1972-11-16 GB GB5289972A patent/GB1369524A/en not_active Expired
- 1972-11-23 FR FR7241752A patent/FR2163047A5/fr not_active Expired
- 1972-11-23 NL NL7215861A patent/NL7215861A/xx unknown
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0027315A1 (en) * | 1979-10-10 | 1981-04-22 | Caterpillar Tractor Co. | Machinery with noise suppression screen |
NO20074803L (en) * | 2005-03-18 | 2007-09-20 | Tumane Entpr Ltd | Device for sound attenuation of flow channel |
EP1878008A1 (en) * | 2005-03-18 | 2008-01-16 | Tumane Enterprises Limited | A sound dampening flow channel device |
EP1878008A4 (en) * | 2005-03-18 | 2012-04-25 | Tumane Entpr Ltd | A sound dampening flow channel device |
CN104421221A (en) * | 2013-09-11 | 2015-03-18 | 珠海格力电器股份有限公司 | Silencer assembly and fan coil |
CN104456905A (en) * | 2013-09-25 | 2015-03-25 | 珠海格力电器股份有限公司 | Silencing structure of air conditioner and air conditioner |
CN104101067A (en) * | 2014-07-08 | 2014-10-15 | 长兴百叶龙演出有限公司 | Air outlet device of air conditioner in theater |
CN104101067B (en) * | 2014-07-08 | 2016-08-24 | 长兴百叶龙演出有限公司 | A kind of air-conditioner air outlet device in arenas |
CN104564248A (en) * | 2014-12-31 | 2015-04-29 | 杭州纯化科技有限公司 | Special bent pipe disturber for DPF low-temperature regeneration igniter of diesel engine |
Also Published As
Publication number | Publication date |
---|---|
DE2158702B2 (en) | 1974-08-01 |
DE2158702C3 (en) | 1975-03-27 |
NL7215861A (en) | 1973-05-29 |
DE2158702A1 (en) | 1973-06-07 |
BE791722A (en) | 1973-03-16 |
FR2163047A5 (en) | 1973-07-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |