CN201606610U - Muffling elbow of ultra-micro pore plate - Google Patents
Muffling elbow of ultra-micro pore plate Download PDFInfo
- Publication number
- CN201606610U CN201606610U CN2009202461191U CN200920246119U CN201606610U CN 201606610 U CN201606610 U CN 201606610U CN 2009202461191 U CN2009202461191 U CN 2009202461191U CN 200920246119 U CN200920246119 U CN 200920246119U CN 201606610 U CN201606610 U CN 201606610U
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- orifice plate
- ultra micro
- micro orifice
- shell
- ultra
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Abstract
The utility model relates to a muffling elbow of an ultra-micro pore plate, which is characterized in that: the muffling elbow comprises a tube-shaped shell; an inlet flange is arranged at an air inlet of the shell, and an outlet flange is arranged at an air outlet of the shell; the connecting positions between the shell and the inlet flange and between the shell and the outlet flange are sealed; at least one layer of perforated metal plate fixedly supported by a supporting skeleton is arranged inside the shell from which a certain distance exists to the circumferential outer wall of the shell; the perforated metal plate is the ultra-micro pore plate with thickness which is of 0.3 to 0.5 mm and pore diameter which is equal to or less than 0.3 mm as well as opening rate which is less than 3%. The muffling elbow uses the ultra-micro pore metal plate; therefore, the flow resistance of the surface structure is very small, the pressure loss is far smaller than that of a porous protecting panel and a fiber cotton type resistive muffling elbow, the air power performance is superior to that of the muffling elbow of the ordinary micro pore plate; particularly, compared with the fiber cotton type resistive muffling elbow, the low-frequency muffling effect of the utility model has a considerable advantage.
Description
Technical field
The utility model relates to a kind of bend muffler that is used for heating ventilation air-conditioning system, particularly about a kind of ultra micro orifice plate bend muffler.
Background technique
Construct noise and pneumatic noise are problems bigger in the heating ventilation air-conditioning system in the ventilation duct, in spaces such as concert hall, assembly hall, hotel guest room, office often because the ventilation system noise problem causes the acoustic environment can not be up to standard.Use in the ventilation system in metal air channel, pipeline can not play good noise elimination effect, and the noise that blower fan produces can be along pipe transmmision to indoor.Because iron sheet is thinner, flow perturbation and fan vibration also can make the iron sheet vibration simultaneously, thereby form the secondary noise.During air-flow ejection air port, eliminate the noise, also can based on this, in ventilation system, generally need to install silencer because of flow perturbation produces the air-flow regenerated noise in the air port if lack effectively.
At present the research of heating ventilation air-conditioning 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.The widely used sound-absorbing material of present bend muffler mostly is the porous fibre 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 Heating,Ventilating and Air Conditioning (HVAC), ventilation system sound reduction elbow.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 porous fibre sound-absorbing material is Heating,Ventilating and Air Conditioning (HVAC), the ventilation system big hidden danger aspect green safety, wherein reason is that the porous fibre sound-absorbing material easily forms harmful floating dust and pellet.In recent years, more having spelt out the formed pellet befouling environment of this type of porous fibre American-European environmental hygiene, health care circle, special facture industry personage simultaneously also can prestige victimization body health.
Common microwell plate bend muffler has the Environmental Safety characteristic as a kind of bend muffler because of it typically is all metal construction, and use is also arranged in traditional heating ventilation air-conditioning system.Wherein the aperture of porous metal plate is generally 0.8～1mm, and punching rate is 1～3%, and its subject matter is that the noise elimination effect is lower than porous fibre sound-absorbing material bend muffler.And overall volume is big, and the mechanical floor space of occupying between the architecture storey is bigger, and particularly each mechanical floor allows the usage space amount limited in high-rise and skyscraper, so the popularization of this class full-metallic bend muffler is very difficult.Even cause the porous fibre sound-absorbing material to have the problems referred to above, still pursue the still large size use of each tall building merchant of trade benefit, the hidden danger of its existence is startling.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides that a kind of overall volume that is used for heating ventilation air-conditioning system is less, and it is effective to eliminate the noise, the ultra micro orifice plate bend muffler that can not cause floating dust and pellet to pollute to environment.
For achieving the above object, the utility model is taked following technological scheme: a kind of ultra micro orifice plate bend muffler, it is characterized in that: it comprises the housing of a tubular, one suction flange is arranged on the suction port of described housing, one outlet(discharge) flange is arranged on the air outlet of described housing, the joint sealing of described housing and described suction flange and outlet(discharge) flange; Enclosure interior and housing peripheral outer wall at a distance of an end distance from the position, be provided with at least one deck by the perforated metal of support frame fixed support; Described perforated metal is the ultra micro orifice plate, and the thickness of described ultra micro orifice plate is 0.3～0.5mm, aperture≤0.3mm, percent opening＜3%.
Described housing is L shaped tubular, and the cross section of tube is circle or rectangle.
Perforated metal in the described housing is two-layer, and two-layerly is described ultra micro orifice plate.
Perforated metal in the described housing is two-layer, and internal layer is common microwell plate, and skin is described ultra micro orifice plate.
Distance between described support frame is 100～300mm.
The percent opening of described ultra micro orifice plate≤1%.
The utility model is owing to take above technological scheme, it has the following advantages: 1, the utility model is because the bend muffler that adopts the ultramicropore sheet metal to make, its aperture only is 0.3mm or below the 0.3mm, thereby the acoustic resistance and the ratio of acoustical mass are greatly improved, simultaneously according to the Ma Dayou academician of Chinese Academy of Sciences microwell plate accurate Theory, the aperture is the sound sucting band that the following microwell plate of 0.3mm will have broad, so the utility model can solve the problem that is difficult to the medium and low frequency noise eliminated in the prior art effectively.2, the utility model is owing to use Chinese patent application " a kind of method of porous metal plate making and the product " (patent No.: 00128297.2; The applying date: the porous metal plate on December 15th, 2000) has replaced fiber sound-absorbing material, protection slab and glass fibre cloth etc., therefore under the suitable situation of cost, ultra micro orifice plate bend muffler of the present utility model has that volume is little, the characteristics of good muffling effect and non-environmental-pollution, so its application area is more extensive.3, bend muffler of the present utility model uses the ultramicropore sheet metal, so the flow resistance of its surface structure is very little, the pressure loss is less than porous protection slab+cellucotton formula resistance noise reduction elbow, aerodynamic quality also is better than common microwell plate bend muffler, particularly low frequency noise elimination effect and has sizable advantage than cellucotton formula bend muffler.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 bend muffler structural type such as compound, and have characteristics such as not water funk, oily, high temperature, can not produce harmful floating dust and pellet, be a kind of noise control apparatus of safe, efficient, environment protection type.The utility model can be widely used in the air-conditioning, ventilation system of public places such as subway, hospital, sports buildings, civil building, can also be used for Heating,Ventilating and Air Conditioning (HVAC), the ventilation system in fields such as special industry production.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Fig. 2 is an elevational schematic view of the present utility model
Fig. 3 is the bent signal of a validity contrast and experiment of the present utility model line chart
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 1 and Figure 2, the utility model comprises housing 1, suction flange 2, outlet(discharge) flange 3 and perforated metal 4.Housing 1 is L shaped tubular, and the cross section of tube is circle or rectangle.Suction flange 2 is arranged on the suction port of housing 1, be used for being connected with the air outlet of upstream Heating,Ventilating and Air Conditioning (HVAC) pipeline, outlet(discharge) flange 3 is arranged on the air outlet of housing 1, is used for being connected with the suction port of downstream Heating,Ventilating and Air Conditioning (HVAC) pipeline, and housing 1 seals with the joint of suction flange 2 and outlet(discharge) flange 3.Housing 1 inner with its peripheral outer wall at a distance of an end distance from the position, be provided with at least one deck by the perforated metal 4 of a plurality of support frame fixed supports.Perforated metal 4 is the ultra micro orifice plate, and the thickness of ultra micro orifice plate is 0.3～0.5mm, aperture≤0.3mm, percent opening＜3%.
The ultra micro orifice plate that the utility model uses is Chinese patent application " a kind of method of porous metal plate making and the product " (patent No.: the product 00128297.2), 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 acoustical mass is much smaller, and acoustic resistance greatly improves with the ratio of acoustical mass.Simultaneously according to the Ma Dayou academician of Chinese Academy of Sciences microwell plate 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.Simultaneously, though the microwell plate that the ultra micro orifice plate that the utility model uses goes out than machining compare on the cost slightly high by about 10%, but because ultra micro orifice plate bend muffler of the present utility model has the acoustic characteristics of high-efficiency broadband, thereby make under the acoustic attenuation performance situation identical with effective flow area, its boundary dimension can effectively be dwindled, thereby has reduced the cost of bend muffler to a certain extent.Ultra micro orifice plate bend muffler of the present utility model is compared with the porous fibre bend muffler simultaneously, owing to use the ultra micro orifice plate to replace fiber sound-absorbing material, protection slab and glass fibre cloth etc., so the cost of ultra micro orifice plate bend muffler is suitable substantially with the porous fibre bend muffler.Under the suitable situation of cost, ultra micro orifice plate bend muffler of the present utility model has characteristics such as volume is little, good muffling effect, not water funk oil is high temperature resistant, and can not produce the characteristics of harmful floating dust and pellet, so its application area is more extensive.
In order to prove validity of the present utility model, adopt individual layer microwell plate of the prior art and ultra micro orifice plate of the present utility model to carry out comparative tests.Two kinds of different orifice structure parameters are as shown in table 1 in the experiment:
Table 1 experiment structural parameter
| Sequence number | Model | The orifice plate type | The orifice structure parameter |
| 10 | LC-CW-100 | The ultra micro orifice plate | Aperture 0.3mm, thickness of slab 0.3mm, punching rate 0.6% |
| 11 | LC-WW-100 | The individual layer microwell plate | Aperture 0.8mm, thickness of slab 0.8mm, punching rate 0.3% |
As shown in Figure 3, from the experimental result curve as can be seen, noise elimination effect of the present utility model is better than the microwell plate bend muffler of prior art to some extent on octave center frequency, A sound level, L sound level.
Structure of the present utility model is formed and Placement all can change to some extent, various variations of carrying out according to the technical solution of the utility model and be equal to replacement and should do not get rid of outside protection domain of the present utility model.
Claims (10)
1. ultra micro orifice plate bend muffler, it is characterized in that: it comprises the housing of a tubular, one suction flange is arranged on the suction port of described housing, and an outlet(discharge) flange is arranged on the air outlet of described housing, the joint sealing of described housing and described suction flange and outlet(discharge) flange; Enclosure interior and housing peripheral outer wall at a distance of an end distance from the position, be provided with at least one deck by the perforated metal of support frame fixed support; Described perforated metal is the ultra micro orifice plate, and the thickness of described ultra micro orifice plate is 0.3～0.5mm, aperture≤0.3mm, percent opening＜3%.
2. a kind of ultra micro orifice plate bend muffler as claimed in claim 1, it is characterized in that: described housing is L shaped tubular, the cross section of tube is circle or rectangle.
3. a kind of according to claim 1 ultra micro orifice plate bend muffler is characterized in that: the perforated metal in the described housing is two-layer, and two-layerly is described ultra micro orifice plate.
4. as a kind of ultra micro orifice plate bend muffler as described in the claim 2, it is characterized in that: the perforated metal in the described housing is two-layer, and two-layerly is described ultra micro orifice plate.
5. as a kind of ultra micro orifice plate bend muffler as described in claim 1 or 2 or 3 or 4, it is characterized in that: the perforated metal in the described housing is two-layer, and internal layer is common microwell plate, and skin is described ultra micro orifice plate.
6. as a kind of ultra micro orifice plate bend muffler as described in claim 1 or 2 or 3 or 4, it is characterized in that: the distance between described support frame is 100～300mm.
7. as a kind of ultra micro orifice plate bend muffler as described in the claim 5, it is characterized in that: the distance between described support frame is 100～300mm.
8. as a kind of ultra micro orifice plate bend muffler as described in claim 1 or 2 or 3 or 4 or 7, it is characterized in that: the percent opening of described ultra micro orifice plate≤1%.
9. as a kind of ultra micro orifice plate bend muffler as described in the claim 5, it is characterized in that: the percent opening of described ultra micro orifice plate≤1%.
10. as a kind of ultra micro orifice plate bend muffler as described in the claim 6, it is characterized in that: the percent opening of described ultra micro orifice plate≤1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202461191U CN201606610U (en) | 2009-09-23 | 2009-09-23 | Muffling elbow of ultra-micro pore plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202461191U CN201606610U (en) | 2009-09-23 | 2009-09-23 | Muffling elbow of ultra-micro pore plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201606610U true CN201606610U (en) | 2010-10-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202461191U Expired - Lifetime CN201606610U (en) | 2009-09-23 | 2009-09-23 | Muffling elbow of ultra-micro pore plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201606610U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
-
2009
- 2009-09-23 CN CN2009202461191U patent/CN201606610U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| CN103383140B (en) * | 2012-05-04 | 2016-04-06 | 美的集团股份有限公司 | Indoor air conditioner cabinet denoising structure, indoor air conditioner cabinet and air-conditioner |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101013 |