CN2210270Y - Guiding flow and sound-adsorption device for centrifugal fan - Google Patents
Guiding flow and sound-adsorption device for centrifugal fan Download PDFInfo
- Publication number
- CN2210270Y CN2210270Y CN 94222634 CN94222634U CN2210270Y CN 2210270 Y CN2210270 Y CN 2210270Y CN 94222634 CN94222634 CN 94222634 CN 94222634 U CN94222634 U CN 94222634U CN 2210270 Y CN2210270 Y CN 2210270Y
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- sound
- fan
- water conservancy
- conservancy diversion
- adsorption device
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Abstract
The utility model discloses a flow guiding and sound-adsorption device for a centrifugal fan, belonging to the technical field of machines, and comprising a conical shell body and a plurality of sound-absorption paths; the sound-absorption paths are distributed on the surface of the shell body; sound-absorption materials are filled into the cavity of the shell body. The utility model has the function of flow guiding which is effective in reducing the low-frequency eddy noise and the medium-frequency eddy noise of a fan; moreover, the flow guiding and sound-adsorption device for a centrifugal fan has the better function of sound-adsorption which is effective in absorbing the medium-frequency noise and the high-frequency noise of the fan. The utility model is installed in the air inlet of the fan; when the flow guiding and sound-adsorption device for a centrifugal fan is installed, the structure and the external dimensions of the fan are not changed.
Description
The utility model belongs to the machine technology field, further relates to a kind of centrifugal blower water conservancy diversion sound absorber.
Multi-wing centrifugal formula ventilator is a large amount of aerodynamic force equipment that use in the industries such as air-conditioning, refrigeration.It will produce strong noise pollution at operation process.For this reason, manufacturer and researcher have developed some denoising devices both at home and abroad.Denoising device commonly used has: blower fan snail tongue is made resonance sound-absorbing snail tongue, adds modified tone grid (transition meshes) on draught fan impeller, volute of blower is made interlayer sound absorption spiral case etc.These denoising devices all have certain narrow limitation and deficiency, only effective as resonance sound-absorbing snail tongue to reducing the single-frequency noise, therefore, be used in the centrifugal blower based on rotational noise more, should not adopt for noise reduction based on the multi-wing centrifugal fan of eddy current crack; The modified tone grid is effective to reducing blower fan Low Medium Frequency eddy current crack, and still, it can make the blower fan high-frequency noise raise when reducing blower fan Low Medium Frequency noise, simultaneously, will produce the bigger pressure loss, reduces the blower fan service behaviour; Interlayer sound absorption spiral case mainly absorbs the blower fan high-frequency noises, not good to regulation effect based on the air whirl noise of Low Medium Frequency, and, it is to do an outer spiral case on the basis of original volute of blower again, not only make difficulty but also increase the blower fan external dimension again, fan uses and makes troubles.
The utility model proposes a kind of multi-wing centrifugal fan water conservancy diversion sound absorber.Purpose is to overcome the deficiency of existing denoising device, and a kind of effective centrifugal blower denoising device is provided, and reduces the pollution of fan noise to environment.
The water conservancy diversion sound absorber that the utility model provides.Not only has guide functions but also have sound absorption.It comprises the housing of outer surface and the sound-absorbing material of enclosure interior.Hull shape is taper, and the vertex of a cone is installed in the air inlet place down with the wind, and the gas that blower fan is gone in convection current plays the effect of water conservancy diversion, makes air-flow along the smooth and easy inflow impeller of conical surface leaf road, thereby can reduce the air whirl noise.The concrete structure parameter of cone can get by assay optimization according to concrete blower fan structure size.Be distributed with a plurality of sound absorption passages on conical shell, these sound absorption passages and the endoceliac sound-absorbing material of shell match, and the pneumatic noise that flows through surface of shell are played the effect of sound absorption.Suitable sound absorption passage and suitably choose the kind and the unit weight of sound-absorbing material on the design housing, the noise reduction that can realize ideal at the blower fan of different model.
Advantage of the present utility model is:
(1) the water conservancy diversion sound absorber not only has guide functions, and is effective to reducing blower fan Low Medium Frequency eddy current crack.And have sound absorption preferably again, effective to reducing the blower fan high-frequency noises.The effective band of noise abatement is wide, excellent noise reduction effect.
(2) the water conservancy diversion sound absorber is installed in air inlet inside, though air inlet is had certain obstruction, but, because the guide functions of its conical shell, eliminated air whirl at the intake grill place, make leaf road inlet air flow in order, thereby reduced the air whirl loss, thereby the blower pressure that causes loss very little (less than 2%).
(3) device can be by being mounted on air inlet inside, easy to install and, do not change the blower fan embryonal structure, do not increase the external dimension of blower fan.
(4) the water conservancy diversion sound absorber is simple in structure, manufactures easily, and in light weight, cost is low.
The utility model will be further described below in conjunction with accompanying drawing.
Accompanying drawing 1 is a structural representation of the present utility model.
Water conservancy diversion sound absorber surface is a housing 1, is installed with a plurality of sound absorption passages 2 on the housing 1, and housing 1 inner filling sucting sound material 3 accompanies one deck protective material 4 between sound-absorbing material 3 and housing 1 inwall.
Water conservancy diversion sound absorber surface housing 1 is shaped as straight-tapered or circular arc taper.Available metal sheet material shapes, also can form with plastics or glass fibre reinforced plastics casting (housing wall thickness 1mm～5mm).The a plurality of sound absorption passages 2 of distribution on the housing 1, its sectional shape can be various rules or irregularly shaped, and the sectional area sum of all sound absorption passages 2 accounts for 5%～30% of housing 1 surface area.Filling sucting sound material 3 in the housing chamber, can choose different types of porous sound-absorbing materials such as slag wool, polyamine fat vacuole foam, sound absorption silk flosssilk wadding according to different needs.In order to guarantee the acoustically effective of sound-absorbing material, prolong the working life of sound-absorbing material, (thickness is less than 0 to press from both sides layer of plastic film between inner walls and sound-absorbing material.2mm) or protective material 4 such as glass cloth, thus to prevent that dust in the air-flow and moisture from entering porous sound-absorbing material and reducing its acoustically effective.
Claims (5)
1, a kind of centrifugal blower water conservancy diversion sound absorber, it comprises housing and sound-absorbing material, it is characterized in that: described housing is taper, surface of shell a plurality of sound absorption passages that distribute, described sound-absorbing material is filled in the housing chamber.
2, centrifugal blower water conservancy diversion sound absorber as claimed in claim 1, it is characterized in that: described conical shell is the right cone shape.
3, centrifugal blower water conservancy diversion sound absorber as claimed in claim 1, it is characterized in that: described conical shell is the circular arc taper.
4, centrifugal blower water conservancy diversion sound absorber as claimed in claim 1 is characterized in that: a plurality of opening area sums of described sound absorption passage account for surface of shell long-pending 5%～30%.
5, centrifugal blower water conservancy diversion sound absorber as claimed in claim 1 is characterized in that: between described conical shell madial wall and the sound-absorbing material, plastic pellicle is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94222634 CN2210270Y (en) | 1994-09-27 | 1994-09-27 | Guiding flow and sound-adsorption device for centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94222634 CN2210270Y (en) | 1994-09-27 | 1994-09-27 | Guiding flow and sound-adsorption device for centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2210270Y true CN2210270Y (en) | 1995-10-18 |
Family
ID=33836595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94222634 Expired - Fee Related CN2210270Y (en) | 1994-09-27 | 1994-09-27 | Guiding flow and sound-adsorption device for centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2210270Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939397A (en) * | 2014-04-22 | 2014-07-23 | 西安交通大学 | Sound absorption diffuser for impeller machine |
| CN106322474A (en) * | 2016-08-28 | 2017-01-11 | 杭州老板电器股份有限公司 | Flow-guiding, sound-absorbing and three-dimensional noise-reducing system of kitchen ventilator |
| CN107882737A (en) * | 2017-11-07 | 2018-04-06 | 珠海凌达压缩机有限公司 | Compressor bracket component and compressor |
| CN109595650A (en) * | 2017-09-30 | 2019-04-09 | 宁波方太厨具有限公司 | A kind of near-suction type oil smoke suction machine |
| CN110985444A (en) * | 2020-01-06 | 2020-04-10 | 北京航天奥祥通风科技股份有限公司 | Fan and fan assembly |
| CN111022373A (en) * | 2018-10-10 | 2020-04-17 | 株洲中车时代电气股份有限公司 | Converter silencing air duct system and method for reducing low-frequency noise |
| CN111677697A (en) * | 2020-05-06 | 2020-09-18 | 徐州徐工环境技术有限公司 | Motor sweeper fan silencing device |
| CN113153825A (en) * | 2021-02-07 | 2021-07-23 | 李卫东 | A silencing device and fan for fan |
| CN113864836A (en) * | 2020-06-30 | 2021-12-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Smoke exhaust ventilator |
-
1994
- 1994-09-27 CN CN 94222634 patent/CN2210270Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939397A (en) * | 2014-04-22 | 2014-07-23 | 西安交通大学 | Sound absorption diffuser for impeller machine |
| CN106322474A (en) * | 2016-08-28 | 2017-01-11 | 杭州老板电器股份有限公司 | Flow-guiding, sound-absorbing and three-dimensional noise-reducing system of kitchen ventilator |
| CN106322474B (en) * | 2016-08-28 | 2019-04-19 | 杭州老板电器股份有限公司 | A kind of water conservancy diversion sound-absorbing solid noise reduction system of kitchen ventilator |
| CN109595650A (en) * | 2017-09-30 | 2019-04-09 | 宁波方太厨具有限公司 | A kind of near-suction type oil smoke suction machine |
| CN109595650B (en) * | 2017-09-30 | 2024-01-16 | 宁波方太厨具有限公司 | Near-suction type range hood |
| CN107882737A (en) * | 2017-11-07 | 2018-04-06 | 珠海凌达压缩机有限公司 | Compressor bracket component and compressor |
| CN111022373A (en) * | 2018-10-10 | 2020-04-17 | 株洲中车时代电气股份有限公司 | Converter silencing air duct system and method for reducing low-frequency noise |
| CN110985444A (en) * | 2020-01-06 | 2020-04-10 | 北京航天奥祥通风科技股份有限公司 | Fan and fan assembly |
| CN111677697A (en) * | 2020-05-06 | 2020-09-18 | 徐州徐工环境技术有限公司 | Motor sweeper fan silencing device |
| CN113864836A (en) * | 2020-06-30 | 2021-12-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Smoke exhaust ventilator |
| CN113864836B (en) * | 2020-06-30 | 2023-08-01 | 佛山市顺德区美的洗涤电器制造有限公司 | Fume exhaust fan |
| CN113153825A (en) * | 2021-02-07 | 2021-07-23 | 李卫东 | A silencing device and fan for fan |
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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 |