CN2135677Y - Composite sound damping wind pipe - Google Patents
Composite sound damping wind pipe Download PDFInfo
- Publication number
- CN2135677Y CN2135677Y CN 92225824 CN92225824U CN2135677Y CN 2135677 Y CN2135677 Y CN 2135677Y CN 92225824 CN92225824 CN 92225824 CN 92225824 U CN92225824 U CN 92225824U CN 2135677 Y CN2135677 Y CN 2135677Y
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- China
- Prior art keywords
- airduct
- wind pipe
- air
- noise elimination
- sectional area
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- Expired - Fee Related
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a composite sound damping wind pipe, mainly formed from an inner wind pipe with an inner wall coated with heat insulation acoustic materials and an outer wind pipe with an inner wall is coated with heat insulation acoustic materials in the mode of a concentric structure. The distance between the inner wind pipe and the outer wind pipe is equal to the 1/4 pi of the low-frequency noise wave length, and the cross section of the outer wind pipe is two times than the cross sectional area of the inner wind pipe; the inner wind pipe bears blowing, and the outer wind pipe bears air return. The cross sectional area of the air pipe can be determined according to the value of air quantity. The concentric structures of the inner wind pipe and the outer wind pipe combines the blowing, the air return, heat insulation, silencing into a body. The utility model is suitable to the gas delivery and heat insulation silencing of air conditioning ventilation engineering.
Description
The utility model is for providing a kind of compound noise elimination airduct that integrates air-supply, return air, insulation, noise reduction in the ventilation and air conditioning system.Its major character be utilize inwall sticking to scribble the giving of thermal insulating material, mode that return air duct is formed concentric structure makes itself is exactly a kind of noise elimination structure system, bears the task of air-supply in the air-conditioning system, return air, insulation, noise reduction.
At present, noise reduction technology in ventilation, air-conditioning system both at home and abroad adopts special-purpose silencing apparatus to carry out noise reduction, the air channel is designed and is all adopted air-supply, return air to alone become the form of system, the argumentation of this respect prior art is seen for details the 773rd page-901 pages man-made noises control handbooks of editing with ［ U.S. ］ L.L.FauLkner of heating ventilator design handbook of Lu Yaoqing chief editor.The shortcoming of special-purpose silencing apparatus is in noise reduction, is subjected to gas shock all to produce the secondary noise, and the noise abatement of ventilation, air-conditioning system is restricted; Alone becoming the supply air system of system and the shortcoming of air return system is the utilization efficiency that has occupied bigger space, reduced building space.Through patent retrieval, there is not to find the technical pattern identical with the utility model in the air conditioner technical field.
Task of the present utility model be ventilate, the air-conditioning system utilization is sent, the concentric structure form of return air duct constitutes a kind of noise reduction, insulating structure system---compound noise elimination airduct, directly bear the task of air-supply, return air, noise reduction, insulation.
Compound noise elimination airduct mainly is to be made of the sticking inside and outside airduct that scribbles the heat preserving sound deadening material of inwall, and inside and outside airduct is the arranged concentric form.Interior airduct is born air-supply, and outer airduct is born return air, and outer airduct section approximates two times of interior airduct cross-sectional area.Distance between the inside and outside airduct approximates 1/4 π of low-frequency noise wavelength.The sticking lining material that is coated with of airduct inwall, both can make thermal insulation, can eliminate the noise again, thermal conductivity and acoustic absorptivity according to it can be chosen the sticking frpf high-quality lining material again that is coated with firmly, airduct can use sheetmetal or other hard material to make, it is 1/2 of whole airduct section that airduct is made section, is convenient to like this install and transportation.
The muffler body that compound noise elimination airduct of the present utility model constitutes is the resistance noise reduction structure.Its noise elimination value △ L.Can try to achieve by Sabine formula:
△L
o＝0.815K·P／S·L
In the formula: △ L
oBe the noise elimination value, decibel; P is an air-flow path section girth, rice; S is an air-flow area of section rice
2K is the function of acoustic absorptivity; L is a muffler body length, rice.
As seen, compound noise elimination airduct has constituted maximum muffler body length L, and it possesses bigger noise elimination value.The interlayer sound insulating structure that compound noise elimination airduct constitutes is than the high 5-10 decibel of single layer structure sound-insulation value of same weight.The sticking lining material that is coated with of its inwall not only has the effect of heat preserving sound deadening, and is desirable vibration damping layer, and it can weaken the vibration at the acoustic wave action lower thin sheet.
The compound noise elimination airduct of the utility model can replace the special-purpose silencing equipment that uses in the prior art, has avoided the secondary noise that silencing apparatus produces in the air channel.Compared with the prior art the form of compound noise elimination airduct concentric structure can take space height 300 millimeter less.Because air-supply is among the encirclement of return air, the temperature difference is less, and thermal loss is little, and energy-saving benefit is arranged.
The supporting use of noise elimination air port light fixture that the compound noise elimination airduct of the utility model can constitute with my patent No. 89213690.1 " reducer pipe silencing apparatus ", constitute more complete air-conditioning system, have air-supply, return air, insulation, noise reduction, throw light in the system of systems of one.
The application comprises two width of cloth accompanying drawings.Wherein
Fig. 1 is the sectional view of compound noise elimination airduct.
Fig. 2 is the system diagram of compound noise elimination airduct and the matching used application example of noise elimination air port light fixture.
Describe compound noise elimination airduct of the present utility model in detail below in conjunction with embodiment and accompanying drawing.
As shown in Figure 1, compound noise elimination airduct of the present utility model mainly is made up of interior airduct (1) and outer airduct (2), the all sticking heat preserving sound deadening material (3) that scribbles of airduct inwall, interior airduct (1) is born air-supply and is connected with the exhaust outlet of air-conditioning unit, outer airduct (2) is born the air outlet of return air and air-conditioning unit and is connected, and the distance between the inside and outside airduct is 1/4 π of low-frequency noise wavelength; The section of airduct (2) is two times of airduct (1) cross-sectional area, and airduct (1) is fixed on airduct (2) inside by support (4), determines the cross-sectional area of airduct according to the air quantity size.
Fig. 2 is the air-conditioning system figure that is made of the compound noise elimination airduct of Fig. 1, air-conditioning unit (5) is connected with the main pipe (8) of compound noise elimination airduct, the arm (9) that goes to each room joins with terminal noise elimination air port light fixture (6), noise elimination air port light fixture has the function that air-supply, return air, illumination and terminal are eliminated the noise, new wind replenishes pipeline (7) and connects with the outer airduct of compound noise elimination airduct (8), and this has just constituted air conditioner circulating system.
Fig. 2 embodiment practical application detail is as follows:
It is 0.4m that compound noise elimination airduct adopts the air-supply section
2And 0.1m
2The Hexagon airduct, be respectively applied for main wind passage (8) and branch air duct (9) product type is respectively: 6FG-0.4,6FG-0.1.
Noise elimination air port lamp (6) uses the type product of YZ 40R * 4.The HF45 II type unit that air-conditioning unit (5) uses Nanjing Coolers Factory to produce.Test data is as follows:
The equipment acoustic noise source is: 71dB(A)
The room noise figure is: 46dB(A)
Room temperature: t=22 ℃
Room humidity: φ=65%
The room illumination degree is: 480Lx
The corridor ceiling height is brought up to 2.5 meters by 2.2 meters.
Claims (2)
1, compound noise elimination airduct, mainly comprise interior airduct (1), outer airduct (2), heat preserving sound deadening material (3), support of duct (4), it is characterized in that interior airduct (1) and outer airduct (2) are the setting type of concentric structure, the spacing of inside and outside airduct is 1/4 π of air-conditioning low-frequency noise wavelength, and outer airduct cross-sectional area is two times of interior airduct cross-sectional area.
2, compound noise elimination airduct as claimed in claim 1, it is characterized by the airduct section can be different geometrical shapies, the cross-sectional area of airduct is determined by the size of carrying air quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92225824 CN2135677Y (en) | 1992-06-23 | 1992-06-23 | Composite sound damping wind pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92225824 CN2135677Y (en) | 1992-06-23 | 1992-06-23 | Composite sound damping wind pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2135677Y true CN2135677Y (en) | 1993-06-09 |
Family
ID=33770369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92225824 Expired - Fee Related CN2135677Y (en) | 1992-06-23 | 1992-06-23 | Composite sound damping wind pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2135677Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925248A (en) * | 2014-05-04 | 2014-07-16 | 苏州喜福瑞农业科技有限公司 | Siphon type straight air exhaust sound receiving box |
| CN112212443A (en) * | 2020-10-27 | 2021-01-12 | 西安建筑科技大学 | Air supply device with annular air opening and design method thereof |
-
1992
- 1992-06-23 CN CN 92225824 patent/CN2135677Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925248A (en) * | 2014-05-04 | 2014-07-16 | 苏州喜福瑞农业科技有限公司 | Siphon type straight air exhaust sound receiving box |
| CN112212443A (en) * | 2020-10-27 | 2021-01-12 | 西安建筑科技大学 | Air supply device with annular air opening and design method thereof |
| CN112212443B (en) * | 2020-10-27 | 2024-02-02 | 西安建筑科技大学 | Air supply device with annular air port and design method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |