CN114992837A - Ventilation flow-guiding silencing cover - Google Patents
Ventilation flow-guiding silencing cover Download PDFInfo
- Publication number
- CN114992837A CN114992837A CN202210695227.7A CN202210695227A CN114992837A CN 114992837 A CN114992837 A CN 114992837A CN 202210695227 A CN202210695227 A CN 202210695227A CN 114992837 A CN114992837 A CN 114992837A
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- Prior art keywords
- noise
- guiding
- air
- wind
- air outlet
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Classifications
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- 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
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- 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
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Flow Control Members (AREA)
Abstract
The invention discloses a ventilation flow-guiding noise reduction cover which is arranged outside relevant equipment and an air outlet of a terrace and comprises a closed noise reduction structure, a wind guiding side and a flow guiding plate, wherein the wind guiding side comprises a wind guiding opening, a top baffle and two side baffles. The air guide side deviates from the direction of the noise sensitive point, the top baffle is arranged at the upper part of the air guide opening, and the two side baffles are arranged at the two sides of the air guide opening; the guide plate is arranged outside the air outlet and deviates from the air guide side direction. The closed silencing structure, the guide plate, the top baffle and the baffles on the two sides are all sound insulation and absorption structures with sound absorption inside and sound insulation outside. The effective sectional area of the air guide opening is more than 2 times larger than that of the air outlet. The influence of the exhaust noise on noise sensitive points is effectively reduced, the normal operation of the original ventilation system is not influenced, and the noise control engineering cost is greatly reduced. The basic national policy of energy conservation, emission reduction, low carbon and economy is met.
Description
Technical Field
The invention relates to a noise control technology of an air outlet, in particular to a ventilation flow-guiding silencing cover.
Background
The roof exhaust noise source of the industrial and commercial building is generally an oil fume exhaust fan, an air conditioning unit fan or an equipment air outlet. The high speed airflow at the fan port impacts the generated aerodynamic noise, while the operation of the main body of the fan device generates low frequency noise. Due to the fact that effective barrier blocking does not exist around the roof, the surrounding environment is affected by noise in a large range, and surrounding noise sensitive points are greatly affected. Exhaust noise is often the main factor in the overproof environmental noise, causing a number of complaints.
The prior art measures are that an air outlet silencer is arranged at an air outlet of a fan, a sound insulation cover is additionally arranged to seal fan equipment, and an air inlet silencer and an air outlet silencer of a sound insulation cover ventilation system and an air exhaust fan are additionally arranged. The above measures can satisfy the control target of the roof exhaust noise, but have the following problems. Firstly, because the air pressure and the system resistance of the exhaust fan are balanced, the additional increase of the resistance of the air outlet silencer can cause the increase of the pressure loss of an exhaust system, reduce the circulating air quantity and influence the ventilation volume. The operation energy consumption of the power equipment is increased by additionally arranging the sound insulation cover and the ventilation system, so that the method is not in accordance with the national policy of energy conservation and emission reduction, and simultaneously, the noise control engineering cost is greatly increased.
Disclosure of Invention
The invention aims to provide a novel structure for controlling the air exhaust noise of the roof of an industrial and commercial building, which effectively reduces the influence of the air exhaust noise on a noise sensitive point by arranging equipment and air flow guiding and noise absorbing measures of an air outlet, does not influence the normal operation of an original ventilation system, and greatly reduces the noise control engineering cost. The cost is low, the construction period is short, and the basic national policy of energy conservation, emission reduction, low carbon and economy is met.
The technical scheme adopted by the invention for solving the technical problem is as follows: a ventilation flow-guide silencing cover is arranged outside relevant equipment and an air outlet of a terrace and comprises a closed silencing structure, a wind guide side and a guide plate, wherein the wind guide side comprises a wind guide opening, a top baffle and two side baffles. The wind guide side deviates from the direction of the noise sensitive point, the top baffle is arranged at the upper part of the wind guide opening, and the two side baffles are arranged at the two sides of the wind guide opening; the guide plate is arranged outside the air outlet and deviates from the air guide side direction. By the measures, the propagation path of sound waves is effectively increased, the sound energy loss caused by sound wave diffraction is blocked, the sound insulation, noise elimination and noise reduction effects are improved, and the basic requirement that the noise reduction of noise sensitive points is more than or equal to 25dB (A) can be met. The closed noise elimination structure comprises a closed type with three U-shaped surfaces and four ceiling surfaces, and a wind guide side is arranged in the direction deviating from the noise sensitive point, or other formed shapes are arranged according to specific working conditions.
The closed silencing structure, the guide plate, the top baffle and the baffles on the two sides are all sound insulation and absorption structures with sound absorption inside and sound insulation outside. The sound level of the noise is effectively reduced by the absorption of the sound insulation and absorption structure for the sound insulation of the air outlet noise outside the inner sound absorption.
The effective sectional area of the air guide opening is more than 2 times larger than that of the air outlet. Effectively reduces the airflow velocity and the resistance coefficient of the air outlet and avoids the airflow regeneration noise. The open air guide opening is also an equipment maintenance channel.
The invention has the beneficial effects that: by means of the technical measures of blocking, absorbing, guiding and the like, the influence of exhaust noise on noise sensitive points is effectively reduced, meanwhile, the normal operation of an original ventilation system is not influenced, and the noise control engineering cost is greatly reduced.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a front structural view of the embodiment.
Fig. 2 is a top configuration view of the embodiment.
In the figure, 1, a closed silencing structure, 2, a wind guiding side, 21, a wind guiding opening, 22, a top baffle, 23, a side baffle, 3, equipment, 31, a wind outlet, 32, a guide plate, 4, a terrace and 5, noise sensitive points are arranged.
Detailed Description
In the embodiment shown in fig. 1 and 2, a ventilation flow-guiding muffling cover is arranged outside a related device (3) and an air outlet (31) of a floor (4), and comprises a closed muffling structure (1), an air-guiding side (2) and a flow-guiding plate (32), wherein the air-guiding side (2) comprises an air-guiding opening (21), a top baffle (22) and two side baffles (23). The wind guide side (2) deviates from the direction of the noise sensitive point (5), the top baffle (22) is arranged at the upper part of the wind guide opening (21), and the two side baffles (23) are arranged at the two sides of the wind guide opening (21); guide plate (32) set up outside air exit (3), deviate from air guide side (2) direction.
The closed type noise elimination structure (1), the guide plate (32), the top baffle (22) and the two side baffles (23) are all sound insulation and absorption structures with sound absorption inside and sound insulation outside. The effective sectional area of the air guide opening (21) is more than 2 times larger than that of the air exhaust opening (31).
It will be appreciated that various changes can be made to the embodiments described above, including application to other locations, without departing from the scope of the invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a ventilation water conservancy diversion noise elimination cover sets up outside relevant equipment and the air exit of terrace, including closed noise cancelling structure and wind-guiding side, guide plate, the wind-guiding side includes wind-guiding mouth, top shield, both sides baffle, characterized by: the wind guide side deviates from the direction of the noise sensitive point, the top baffle is arranged at the upper part of the wind guide opening, and the two side baffles are arranged at the two sides of the wind guide opening; the guide plate is arranged outside the air outlet and deviates from the air guide side direction.
2. A ventilation, flow-guiding and sound-deadening hood as set forth in claim 1, wherein: the closed silencing structure, the guide plate, the top baffle and the baffles on the two sides are all sound insulation and absorption structures with sound absorption inside and sound insulation outside.
3. A ventilation, flow-guiding and sound-deadening hood as set forth in claim 1, wherein: the effective sectional area of the air guide opening is more than 2 times larger than that of the air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210695227.7A CN114992837A (en) | 2022-06-20 | 2022-06-20 | Ventilation flow-guiding silencing cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210695227.7A CN114992837A (en) | 2022-06-20 | 2022-06-20 | Ventilation flow-guiding silencing cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114992837A true CN114992837A (en) | 2022-09-02 |
Family
ID=83034299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210695227.7A Pending CN114992837A (en) | 2022-06-20 | 2022-06-20 | Ventilation flow-guiding silencing cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114992837A (en) |
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2022
- 2022-06-20 CN CN202210695227.7A patent/CN114992837A/en active Pending
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |