CN2876612Y - Silencer for ventilation system of Heating ventilating and air conditioning - Google Patents
Silencer for ventilation system of Heating ventilating and air conditioning Download PDFInfo
- Publication number
- CN2876612Y CN2876612Y CN 200620000850 CN200620000850U CN2876612Y CN 2876612 Y CN2876612 Y CN 2876612Y CN 200620000850 CN200620000850 CN 200620000850 CN 200620000850 U CN200620000850 U CN 200620000850U CN 2876612 Y CN2876612 Y CN 2876612Y
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- silencer
- plate
- ventilating system
- orifice plate
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Abstract
The utility model relates to a silencer for ventilation system of heating ventilating and air conditioning which comprises a rigid housing, an inlet and an out flange which connect with heating-ventilating air-conditioning pipe are installed on the two ends of the rigid housing, at least a circle of perforated metal which is supported by framework is installed at the place which is an intervals with the circular exine of the rigid housing, the device is characterized in that: the perforated metal is the ultramicropore plate, the thickness of the ultramicropore plate is 0.3 to 0.5mm, the aperture is less than or equal to 0.3mm, the opening ratio is less than 3 percent. The silencer which adopts the ultramicropore plate to manufacture, possesses the thin and dense aperture which owns bigger acoustic resistance than the common micro plate but more smaller sound quality, and the rate between the acoustic resistance and the sound quality is improved greatly. The utility model is characterized in that: waterproof, oil-proofing, fearless of high temperature, and efficient broadband sound-absorption, etc. Compared with the metal structure micro-plate silencer under the same flow parameters, the device possesses small volume without producing poisonous floating dust and sniffable particulates, so the device is a safe, efficient and environmental noise control device which can be widely used all kinds of ventilation system of heating ventilating and air conditioning.
Description
Technical field
The utility model relates to a kind of silencer, particularly about a kind of silencer that is used for the HVAC ventilating system.
Background technology
The research of HVAC ventilating system noise control is not just considered to reduce noise, will create safety, comfortable acoustic environment simultaneously, using healthy, safe sound-absorbing material is to obtain the indispensable a kind of measure of desirable acoustic environment.Present widely used sound-absorbing material mostly is the mineral fibres material greatly, and its main feature is that cost is low, acoustic absorptivity is high, production is simple, so it is always as the main sound-absorbing material of HVAC, ventilation system sound reduction device.Along with social development, green safety becomes the social concerns focus, international HVAC circle is generally reached a kind of common recognition, think that the mineral fibres sound-absorbing material is HVAC, the ventilating system big hidden danger aspect green safety, wherein reason is that the mineral fibres sound-absorbing material easily forms harmful floating dust and pellet.In recent years, more spelt out the formed pellet contaminated environment of this type of mineral fibres and may threaten health American-European environmental sanitation, health care circle, special facture industry personage.
At present, China mostly is the mineral sound-absorbing material at a large amount of sound-absorbing materials of civilian and industrial HVAC ventilating system use.After the SARS in 2003, people just begin to consider " secondary pollution " problem that adopts the mineral fibres sound-absorbing material to be produced in HVAC, the ventilation system sound reduction device in to HVAC, the control of ventilating system noise.Thus, insider even propose the building of 21st century and should develop to the direction of no mineral fibres hidden danger, this problem also becomes a bottleneck of HVAC circle pursuit green safety purpose.
Common micro-perforated plate muffler is as a kind of all-metal silencer, in traditional HVAC ventilating system, use is arranged also, wherein the aperture of porous metal plate is generally 0.8～1mm, percent opening is 1～3%, its subject matter is that the noise elimination effect is lower than mineral fibres sound-absorbing material silencer, and overall volume is big, the mechanical floor space of occupying between the architecture storey is bigger, particularly in high-rise and high-rise building, each mechanical floor allows the usage space amount limited, so the popularization of this class all-metal silencer is very difficult.Even cause the mineral fibres sound-absorbing material to have the problems referred to above, but each the skyscraper merchant who pursues trade benefit still continue the large tracts of land use one after another, and the hidden danger of its existence is startling.
Summary of the invention
At the problems referred to above, it is less that the purpose of this utility model provides a kind of overall volume, and it is effective to eliminate the noise, and do not use the silencer that is used for the HVAC ventilating system of mineral fibres sound-absorbing material.
For achieving the above object, the utility model is taked following technical scheme: a kind of silencer that is used for the HVAC ventilating system, it comprises a stiff case, its two ends are provided with an import and export flange that is connected with the HVAC pipeline respectively, be provided with the perforated metal that at least one circle is supported by skeleton with the peripheral outer wall of the described stiff case spacing of being separated by, it is characterized in that: described perforated metal is the ultra micro orifice plate, the thickness of described ultra micro orifice plate is 0.3～0.5mm, aperture≤0.3mm, percent opening＜3%.
Described percent opening≤1%.
The perforated metal that is arranged in the described stiff case is two-layer, and the two-layer ultra micro orifice plate that is.
The perforated metal that is arranged in the described stiff case is two-layer, and wherein internal layer is common microwell plate, and skin is the ultra micro orifice plate.
Distance between described skeleton and skeleton is at 100～300mm.
The cross sectional shape that described stiff case encloses is square or is one of circular.
The cross sectional shape that described perforated metal encloses is square or is one of circular.
The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model is because the silencer that adopts the ultramicropore metallic plate to make, its aperture only is 0.3mm or below the 0.3mm, percent opening is below 3%, even the percent opening of whole plate body is reduced to below 1%, thin and close little ultramicropore is all much bigger than the acoustic resistance of common microwell plate, and acoustic mass is much smaller, acoustic resistance greatly improves with the ratio of acoustic mass, simultaneously according to the Ma Dayou academician of Chinese Academy of Sciences microperforated panel accurate Theory, the aperture is the sound sucting band that the following microwell plate of 0.3mm will have broad, therefore can solve effectively to be difficult to the low-frequency noise eliminated in the prior art.2, (patent No. is: ZL00128297.2) the ultra micro orifice plate produced in batches of scale to use the method for the at present all distinctive porous metal plate makings of the applicant, the microwell plate that goes out with machining compare on the cost slightly high by about 10%, but because ultra micro orifice plate silencer has the acoustic characteristics of high-efficiency broadband, make under the acoustic attenuation performance situation identical with effective flow area, its appearance and size can effectively be dwindled, thereby has reduced the cost of silencer to a certain extent; Compare with the porous fibre silencer, owing to replaced fiber sound-absorbing material, protection slab and glass wool cloth etc. with the ultra micro orifice plate, so the cost of ultra micro orifice plate silencer is suitable substantially with it.3, silencer of the present utility model uses the ultramicropore metallic plate, so the flow resistance of its surface texture is very little, the pressure loss is far smaller than porous protection slab+cellucotton formula dissipative muffler, aerodynamic quality also is better than common micro-perforated plate muffler, and particularly low frequency noise elimination good effectiveness is its big advantage than cellucotton formula silencer; Under the identical situation of muffler volume, noise elimination effect of the present utility model obviously is better than common micro-perforated plate muffler at present, and under the circulation area condition identical with acoustic attenuation performance, its contour structure size is significantly less than the micro-perforated plate muffler of present use.4, the utility model can be according to specific requirements such as space, performance, costs, adopt single-layer type, double deck type, multiple ultra micro orifice plate acoustic wave filter structure form such as compound, and have characteristics such as not water funk, oily, high temperature, can not produce harmful floating dust and pellet, it is a kind of noise control appliance of safe, efficient, environment-friendly type, particularly the utility model can be saved the space effectively, makes its promoting the use of in high-rise and high-rise building become possibility.The utility model can be widely used in the air-conditioning, ventilating system of public places such as subway, hospital, sports buildings, civil buildings, can also be used for HVAC, the ventilating system in fields such as special industry production.
Description of drawings
Fig. 1 is the utility model result schematic diagram
Fig. 2 is the schematic side view of Fig. 1
Fig. 3 is the local enlarged diagram of Fig. 1
Fig. 4 is another embodiment of the present utility model
Fig. 5 is the local enlarged diagram of Fig. 4
Fig. 6 is the insertion loss of individual layer ultra micro orifice plate and individual layer micro-perforated plate muffler (100mm)
Fig. 7 is the insertion loss of double-deck ultra micro orifice plate and double-deck micro-perforated plate muffler (200mm)
Fig. 8 is the insertion loss of two-layer compound silencer and double-deck micro-perforated plate muffler (200mm)
Fig. 9 is that individual layer ultra micro orifice plate silencer (100mm) loses with the insertion of individual layer micro-perforated plate muffler (150mm)
Figure 10 is that individual layer ultra micro orifice plate silencer (150mm) loses with the insertion of double-deck micro-perforated plate muffler (200mm)
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
Embodiment 1:
As Fig. 1, Fig. 2, shown in Figure 3, the utility model comprises a stiff case 1, the two ends of stiff case 1 are provided with an import and export flange that is connected with the HVAC pipeline 2,3 respectively, with the peripheral outer wall of the stiff case 1 circle perforated metal that is provided with separated by a distance, this perforated metal is little ultra micro orifice plate 4, and ultra micro orifice plate 4 adopts stainless steel material, and its thickness is at 0.3～0.5mm, aperture≤0.3mm, percent opening are 0.5～1%.For individual layer ultra micro orifice plate silencer, cavity 5 degree of depth between ultra micro orifice plate 4 and the stiff case 1 are general≤200mm, several cavitys 5 commonly used are respectively 50mm, 100mm, 150mm, 200mm deeply, and influence is bigger to acoustically effective in the variation of cavity 5 degree of depth.
In the foregoing description, the material of outer rigid housing 1 generally is to adopt galvanized sheet, and its thickness is at 0.8～1.2mm.The cross sectional shape of outer rigid housing 1 and ultra micro orifice plate all can change, such as: its cross sectional shape all is square or circular, again such as: outer rigid housing 1 cross sectional shape is square, and the perforated metal cross sectional shape is circular, or outer rigid housing 1 cross sectional shape is circular, and the perforated metal cross sectional shape is square.
Because the thickness of ultra micro orifice plate is thinner than common microwell plate generally at 0.3～0.5mm, easy chatter under the fluid excitation, so skeleton 9 distributes than comparatively dense in the silencer inner bag, the distance between skeleton and skeleton is between 250～300mm.
Embodiment 2:
As Fig. 4, shown in Figure 5, in the present embodiment ultra micro orifice plate 4 can be provided with two-layer, its noise elimination better effects if.Also can use common microwell plate 6 by internal layer, the aperture is 0.8mm, and percent opening is 1～3%, and skin uses ultra micro orifice plate 4, aperture≤0.3mm, and percent opening≤1%, percent opening can also improve again, but is no more than 3%; Cavity between common microwell plate 6 of internal layer and the outer ultra micro orifice plate 4 is an ante-chamber 7 at this moment, cavity between outer ultra micro orifice plate 4 and the outer rigid housing 1 is a back cavity 8, for double-deck ultra micro orifice plate silencer, composite muffler, then the chamber in chamber 7,8 is dark in will equaling greater than 1/3 before and after it, and several chambeies commonly used value deeply are respectively 40/60,50/50,50/100,50/150,80/120 (mm).
Embodiment 3:
Silencer appearance and size (length * wide * height) can design and change according to actual needs, in any case but change, it is compared with existing common micro-perforated plate muffler, and its beneficial effect all is very outstanding, such as under the situation of same noise elimination effect:
The common micro-perforated plate muffler of (1) 300 * 300 * 900 alternative 400 * 400 * 900 individual layers of individual layer ultra micro orifice plate silencer, volume only are original 9/16, are about original 0.56 times.
The common micro-perforated plate muffler of (2) 400 * 400 * 900 alternative 500 * 500 * 900 individual layers of individual layer ultra micro orifice plate silencer, volume only are original 16/25, are about original 0.64 times.
(3) 500 * 500 * 900 individual layer ultra micro orifice plate silencers alternative 600 * 600 * 900 double-deck common micro-perforated plate mufflers, volume only are original 25/36, are about original 0.69 times.
The silencer that the utility model uses the ultra micro orifice plate to form is a kind of silencer of simple metal structure, and its noise elimination mechanism is to utilize its inner ultra micro orifice plate resonance sound-absorbing structure to realize.Ultra micro orifice plate sound absorption structure is that the Helmholtz resonant cavity develops from single cavity resonance sound absorption structure, and it is equivalent to a plurality of independent apertures and cavity parallel connection, therefore can be regarded as a resonator system of being made up of quality and spring.The ultra micro sound absorbent perforated structure is because its hole is thin and close, and is therefore much bigger than the acoustic resistance of common microwell plate, and acoustic mass is much smaller, and its acoustic resistance greatly improves with the ratio of acoustic mass, has the sound absorbing capabilities of high-efficiency broadband band.It below is the comparison legend of acoustically effective under the various situations.
As shown in Figure 6, the silencer that is to use the common microwell plate 6 of individual layer ultra micro orifice plate 4 and individual layer to make compares in the insertion loss that cavity depth is under the 100mm situation, from figure more as can be seen, individual layer ultra micro orifice plate silencer has the sound deadening capacity of 10dB near low frequency 63Hz, by changing cavity depth, can further improve low frequency noise elimination effect, this is that the fiber dissipative muffler is unapproachable; Identical down in circulation area, appearance and size, its acoustic attenuation performance all is better than common micro-perforated plate muffler to some extent on octave band, A sound level, L sound level.
As shown in Figure 7, the insertion loss of silencer when cavity depth is 200mm that is to use double-deck ultra micro orifice plate 4 and double-deck microwell plate 6 to make compared, as shown in Figure 8, the insertion loss when cavity depth is 200mm of two-layer compound silencer of forming by the common microwell plate 6 of one deck and one deck ultra micro orifice plate 4 and double-deck common micro-perforated plate muffler relatively, from the acoustic attenuation performance of the more double-deck ultra micro orifice plate silencer of two figure and composite muffler in octave center frequency, the A sound level, be better than the double-deck common micro-perforated plate muffler of isostructure size on the L sound level to some extent.
As shown in Figure 9, be individual layer ultra micro orifice plate silencer when cavity depth is 100mm and the insertion loss of the common micro-perforated plate muffler of individual layer when cavity depth is 150mm relatively, from figure more as can be seen, under the identical situation of the flow area of silencer, near frequency 250Hz, the sound deadening capacity of individual layer ultra micro orifice plate silencer when cavity depth is 100mm be a little less than the sound deadening capacity of common micro-perforated plate muffler when cavity depth is 150mm, but all be the micro-perforated plate muffler of 150mm apparently higher than cavity depth in other frequency band and A, L sound level.
As shown in figure 10, be individual layer ultra micro orifice plate silencer when cavity depth is 150mm and the insertion loss of double-deck micro-perforated plate muffler when cavity depth is 200mm relatively, from figure more as can be seen, under the identical situation of the flow area of silencer, two curves of silencer acoustic characteristics are also more approaching, from the A sound level, their noise elimination effect is suitable.This shows that ultra micro orifice plate silencer is better than or is equal under the situation of common micro-perforated plate muffler at acoustic attenuation performance, and its volume can significantly dwindle, and this provides effective solution route and method for the occasion that is subjected to spatial constraints can not effectively carry out noise control.
Claims (10)
1, a kind of silencer that is used for the HVAC ventilating system, it comprises a stiff case, its two ends are provided with an import and export flange that is connected with the HVAC pipeline respectively, be provided with the perforated metal that at least one circle is supported by skeleton with the peripheral outer wall of the described stiff case spacing of being separated by, it is characterized in that: described perforated metal is the ultra micro orifice plate, the thickness of described ultra micro orifice plate is 0.3～0.5mm, aperture≤0.3mm, percent opening＜3%.
2, a kind of silencer that is used for the HVAC ventilating system as claimed in claim 1 is characterized in that: described percent opening≤1%.
3, a kind of silencer that is used for the HVAC ventilating system as claimed in claim 1 is characterized in that: the perforated metal that is arranged in the described stiff case is two-layer, and the two-layer ultra micro orifice plate that is.
4, a kind of silencer that is used for the HVAC ventilating system as claimed in claim 1 is characterized in that: the perforated metal that is arranged in the described stiff case is two-layer, and wherein internal layer is common microwell plate, and skin is the ultra micro orifice plate.
5, as claim 1 or 2 or 3 or 4 described a kind of silencers that are used for the HVAC ventilating system, it is characterized in that: the distance between described skeleton and skeleton is at 100～300mm.
6, as claim 1 or 2 or 3 or 4 described a kind of HVAC ventilating system silencers that are used for, it is characterized in that: the cross sectional shape that described stiff case encloses is square or is one of circular.
7, a kind of HVAC ventilating system silencer that is used for as claimed in claim 5 is characterized in that: the cross sectional shape that described stiff case encloses is square or is one of circular.
8, as claim 1 or 2 or 3 or 4 or 7 described a kind of HVAC ventilating system silencers that are used for, it is characterized in that: the cross sectional shape that described perforated metal encloses is square or is one of circular.
9, a kind of HVAC ventilating system silencer that is used for as claimed in claim 5 is characterized in that: the cross sectional shape that described perforated metal encloses is square or is one of circular.
10, a kind of HVAC ventilating system silencer that is used for as claimed in claim 6 is characterized in that: the cross sectional shape that described perforated metal encloses is square or is one of circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000850 CN2876612Y (en) | 2006-01-11 | 2006-01-11 | Silencer for ventilation system of Heating ventilating and air conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000850 CN2876612Y (en) | 2006-01-11 | 2006-01-11 | Silencer for ventilation system of Heating ventilating and air conditioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2876612Y true CN2876612Y (en) | 2007-03-07 |
Family
ID=37819850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620000850 Expired - Lifetime CN2876612Y (en) | 2006-01-11 | 2006-01-11 | Silencer for ventilation system of Heating ventilating and air conditioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2876612Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645011A (en) * | 2012-04-17 | 2012-08-22 | 广州铭铉净化设备科技有限公司 | Sinusoidal micropore plate muffler of air conditioning system |
| CN104110813A (en) * | 2014-07-01 | 2014-10-22 | 国家电网公司 | Shock-absorption and noise-eliminating device at electricity generating layer ventilation opening |
| CN106128445A (en) * | 2016-08-26 | 2016-11-16 | 四川三元环境治理股份有限公司 | Full microperforated absorber acoustic filter |
| CN109109618A (en) * | 2018-09-21 | 2019-01-01 | 珠海格力电器股份有限公司 | A kind of mute air exhausting structure and air-conditioning |
| CN109489288A (en) * | 2018-11-13 | 2019-03-19 | 科希曼电器有限公司 | A kind of sound insulation and noise reduction device of air-cooled screw unit |
| CN111899707A (en) * | 2020-06-30 | 2020-11-06 | 浙江大学 | Bias flow double-layer perforated plate sound absorption device with adjustable back cavity depth |
-
2006
- 2006-01-11 CN CN 200620000850 patent/CN2876612Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645011A (en) * | 2012-04-17 | 2012-08-22 | 广州铭铉净化设备科技有限公司 | Sinusoidal micropore plate muffler of air conditioning system |
| CN104110813A (en) * | 2014-07-01 | 2014-10-22 | 国家电网公司 | Shock-absorption and noise-eliminating device at electricity generating layer ventilation opening |
| CN106128445A (en) * | 2016-08-26 | 2016-11-16 | 四川三元环境治理股份有限公司 | Full microperforated absorber acoustic filter |
| CN109109618A (en) * | 2018-09-21 | 2019-01-01 | 珠海格力电器股份有限公司 | A kind of mute air exhausting structure and air-conditioning |
| CN109489288A (en) * | 2018-11-13 | 2019-03-19 | 科希曼电器有限公司 | A kind of sound insulation and noise reduction device of air-cooled screw unit |
| CN111899707A (en) * | 2020-06-30 | 2020-11-06 | 浙江大学 | Bias flow double-layer perforated plate sound absorption device with adjustable back cavity depth |
| CN111899707B (en) * | 2020-06-30 | 2023-06-13 | 浙江大学 | Bias flow double-layer perforated plate sound absorption device with adjustable back cavity depth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070307 |
|
| EXPY | Termination of patent right or utility model |