CN104374073A - Air conditioning unit noise control method - Google Patents
Air conditioning unit noise control method Download PDFInfo
- Publication number
- CN104374073A CN104374073A CN201410682962.XA CN201410682962A CN104374073A CN 104374073 A CN104374073 A CN 104374073A CN 201410682962 A CN201410682962 A CN 201410682962A CN 104374073 A CN104374073 A CN 104374073A
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- Prior art keywords
- vibration
- noise
- control method
- air
- vibration isolation
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Classifications
-
- 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
-
- 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
- F24F2013/242—Sound-absorbing material
-
- 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
- F24F2013/247—Active noise-suppression
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to a noise control method, in particular to an air conditioning unit noise control method. The method involves air conditioning unit vibration control and air conditioning unit noise control. A vibration control method comprises the steps that second-level vibration isolation is carried out on an air conditioning unit by connecting damping rubber vibration isolation and damping spring vibration isolation in series, and an acoustic bridge is cut off; a space sound absorber is arranged in a machine room, noise reverberation in the machine room is reduced, a broadband combination sound absorption structure is adopted for the space sound absorber, and according to the noise frequency characteristic of the air conditioning unit, optimization design is carried out on the frequency band sound absorption characteristic of the sound absorber, and the frequency sound absorption characteristic curve of the space sound absorber is established; the space sound absorber is arranged vertically. Through the air conditioning unit noise control method, an on-site noise source and a propagation path are detected and analyzed, the requirements of the national technical standards of China can be completely met, and reference is provided for noise processing of other air conditioning units. The air conditioning unit noise control method is particularly suitable for abatement of the noise of large devices such as steam turbines, wind turbines and air blowers, the noise of the devices can be greatly lowered, and the economic benefit is obvious.
Description
Technical field
The present invention relates to a kind of noise control method, particularly relate to a kind of air-conditioner set noise control method.
Background technology
Industry is with civil buildings, and more and more extensively, its capital equipment is various types of ventilation blower, air conditioner, water pump, refrigerator and compressor for ventilation, the application of air conditioning and refrigeration equipment.Because equipment operationally can produce vibration in various degree, if the pipeline vibrated effectively can not be broken off, vibromotive force must be delivered to the various piece of building by building structure, excite building construction vibration, and along with solid-borne sound transmission, produce irksome low-frequency vibration noise, interference people work normally, learn and live.
Although device type is a lot, the principle of vibration isolation is the same.The vibration that Architectural Equipment produces is by Equipment Foundations, the pipeline be connected with equipment and pipe-supporting component to buildings exterior-protected structure, interference architectural environment, so the vibration of control Architectural Equipment and solid-borne sound transmission are realized by Equipment Foundations and pipeline vibration isolation.
Building structure itself is good conduct vibrations body.Air-conditioner set vibration is delivered to building structure by basis, and vibration is delivered to top-out by building structure again, and vibration is discharged into the interior space with the form of sound again by wallboard, floor.In order to the vibration passing of abatement apparatus is to basis, special vibration isolation process should be carried out in the basis of air-conditioner set and pump, and Equipment Foundations and building structure adopt elasticity to be connected, and cuts off vibration transfer path.Vibration isolation between field pipes support member and pipeline should be strengthened.Together with connector is connected directly between with building structure (wall, floor) again, causes pipeline (flow induced vibrations) to vibrate and also passed to building structure.
Summary of the invention
The object of the present invention is to provide a kind of air-conditioner set noise control method, the present invention carries out detection to the noise source at scene and propagation path and analyzes, this scheme is a set of effective control measure, noise reduction is obvious, the requirement of national technical standard can be met completely, for the noise processed of other air-conditioner set provides reference.Be particularly suitable for the improvement of the main equipment noises such as steam turbine, wind energy conversion system, air blast, greatly can reduce the noise of equipment, economic benefit is obvious.
The object of the invention is to be achieved through the following technical solutions:
A kind of air-conditioner set noise control method, described method comprises air-conditioner set vibration control and air-conditioner set Noise measarement two aspect: vibration control method, and because central air conditioning equipment is positioned at supermarket attic, its basis belongs to flexible foundation, adopt secondary vibration isolation way, thoroughly block Vibration propagation path; The mode adopting damping rubber vibration isolation to connect with damping spring vibration isolation carries out secondary vibration isolation to air-conditioner set, breaks off overhead speaker; Add inert block between two grad vibration isolation layer, play the effect of dashpot, reduce unit vibration, extend unit service life; Vibration isolation process is carried out to unit pipeline and pipeline through-wall place, thus breaks off the overhead speaker of itself and building; Vibration isolation process is carried out to foundation for water pumps and pipeline, prevents pump equipment from producing solid-borne noise to building excitation; Water pump vibration isolator and pump house arrange inert block, prevent pump equipment from vibrating and excessively to cause damage to equipment; Noise control method, installation space sound absorber in machine room, reduces noise reverberation in machine room, suspended absorber selects broadband combined type sound absorption structure, according to air-conditioner set noise frequency characteristic, design is optimized to sound absorber frequency band sound absorption characteristics, the frequency sound absorption characteristics curve of suspended absorber; Suspended absorber takes vertical disposition.
Described a kind of air-conditioner set noise control method, described method installs vibration isolation element between equipment and basis, on equipment pipe.
Described a kind of air-conditioner set noise control method, described method carries out the parameter of Vibration Absorbing System Design, single-degree-of-freedom vibrating isolation system, the determination of vibration isolating effect and calculating.
Described a kind of air-conditioner set noise control method, the parameter of described method Vibration Absorbing System Design comprises to be transmitted than the type of the type of, vibration insulating foundation, support weight ratio, vibration isolation element, specifications and models and arrangement.
Advantage of the present invention and effect are:
The noise of air-conditioner set of the present invention mainly concentrates on medium and low frequency, below 2000Hz, because the noise penetration capacity of medium and low frequency is stronger, for improving overall vibration Noise measarement effect, to carrying out necessary noise reduction process in machine room, reduce noise in machine room, thus reduce the impact of noise pollution on office downstairs.According to above analysis, be no matter the transaudient or direct transmission of noise of structural vibration, the final resident family that arrives endangers the daily life of resident family, in the form of noise so must be administered.
Accompanying drawing explanation
Fig. 1 vibration isolation principle figure;
Fig. 2 suspended absorber sound absorption characteristics curve.
Detailed description of the invention
Below in conjunction with accompanying drawing illustrated embodiment, the invention will be further described.
Air-conditioner set is positioned at supermarket attic, and the vibration noise produced when equipment runs is comparatively large on the impact of office downstairs, must administer it.Consider the characteristic of solid-borne sound transmission, vibration isolation process thoroughly must be carried out to it, effectively could reduce its low-frequency noise and pollute.
Based on on-the-spot noise testing and analysis, adopt and with the following method the vibration noise of air-conditioner set is administered, it mainly comprises air-conditioner set vibration control and air-conditioner set Noise measarement two aspect: vibration control method: because central air conditioning equipment is positioned at supermarket attic, its basis belongs to flexible foundation, must secondary vibration isolation way be adopted, thoroughly block Vibration propagation path.The mode adopting damping rubber vibration isolation to connect with damping spring vibration isolation carries out secondary vibration isolation to air-conditioner set, breaks off overhead speaker.Add inert block between two grad vibration isolation layer, play the effect of dashpot, reduce unit vibration, extend unit service life.Vibration isolation process is carried out to unit pipeline and pipeline through-wall place, thus breaks off the overhead speaker of itself and building.Vibration isolation process is carried out to foundation for water pumps and pipeline, prevents pump equipment from producing solid-borne noise to building excitation.Water pump vibration isolator and pump house arrange inert block, prevent pump equipment from vibrating and excessively to cause damage to equipment.Noise control method: installation space sound absorber in machine room, reduces noise reverberation in machine room, thus reduces the impact of machine room noise pollution on office downstairs.
According to vibration isolation principle, common vibration isolation measure is divided into active vibration isolation and the large class of passive insulation two.Based on the testing and analyzing to scene, the method of active vibration isolation is adopted to carry out vibration isolation process to central air conditioning equipment, namely in order to eliminate or attenuation apparatus (vibration source) vibration passing, between equipment and basis, on equipment pipe, vibration isolation element is installed, make vibration effectively be isolated or control, the vibration isolation measure taked is called active vibration isolation.
The parameter of Vibration Absorbing System Design, the simplest vibrating isolation system, by one only at the rigid objects moved in the vertical direction (i.e. weight), form without the spring of quality and damper, is called single-degree-of-freedom vibrating isolation system Fig. 1.Single-degree-of-freedom vibrating isolation system vibration isolating effect is with definitely transmitting than (transmitting ratio)
represent, definition: the transmitting force being passed to basis by resiliency supported
(or moment
) amplitude and equipment itself disturb power
(or moment
) ratio of amplitude, see following formula:
；
-frequency ratio;
the forcing frequency of-equipment, Hz;
the intrinsic frequency of-vibrating isolation system, Hz.
When ignoring the damping of system, namely during undamped,
, the simplest this vibrating isolation system is called mass-spring system, vibration transfer ratio:
The vibration isolating effect of evaluation system, also uses vibration isolation efficiency sometimes
represent, it and vibration transfer ratio
pass be:
Vibration isolation efficiency
implication: vibration force is isolated a few percent.The step of Vibration Absorbing System Design: determine the technical parameter such as the model of device for vibration insutation, specification, size, weight and power, pressure, flow.According to the intensity of vibration equipment, characteristic and vibration isolation requirement, determine the vibration transfer ratio of vibrating isolation system
.Determine the type of vibration insulating foundation, support weight ratio.Determine the type of vibration isolation element, specifications and models and arrangement.Check the vibration isolation parameter of vibrating isolation system: intrinsic frequency
, frequency ratio
, vibration transfer ratio
, vibration isolation efficiency
whether meet Vibration Absorbing System Design requirement.
This programme, by installation space sound absorber in machine room, reduces noise reverberation in machine room, thus reduces the impact of machine room noise pollution on office downstairs.Concrete technical essential is as follows.Suspended absorber selects broadband combined type sound absorption structure.According to air-conditioner set noise frequency characteristic, design is optimized to sound absorber frequency band sound absorption characteristics, Figure 2 shows that the frequency sound absorption characteristics curve of suspended absorber.Suspended absorber takes vertical disposition, and arrangement areas is about 40% of machine room area.After carrying out vibration noise improvement to supermarket air-conditioning unit, immediately below unit, office noise value reaches 50dB (A) below.
Claims (4)
1. an air-conditioner set noise control method, it is characterized in that, described method comprises air-conditioner set vibration control and air-conditioner set Noise measarement two aspect: vibration control method, because central air conditioning equipment is positioned at supermarket attic, its basis belongs to flexible foundation, adopt secondary vibration isolation way, thoroughly block Vibration propagation path; The mode adopting damping rubber vibration isolation to connect with damping spring vibration isolation carries out secondary vibration isolation to air-conditioner set, breaks off overhead speaker; Add inert block between two grad vibration isolation layer, play the effect of dashpot, reduce unit vibration, extend unit service life; Vibration isolation process is carried out to unit pipeline and pipeline through-wall place, thus breaks off the overhead speaker of itself and building; Vibration isolation process is carried out to foundation for water pumps and pipeline, prevents pump equipment from producing solid-borne noise to building excitation; Water pump vibration isolator and pump house arrange inert block, prevent pump equipment from vibrating and excessively to cause damage to equipment; Noise control method, installation space sound absorber in machine room, reduces noise reverberation in machine room, suspended absorber selects broadband combined type sound absorption structure, according to air-conditioner set noise frequency characteristic, design is optimized to sound absorber frequency band sound absorption characteristics, the frequency sound absorption characteristics curve of suspended absorber; Suspended absorber takes vertical disposition.
2. a kind of air-conditioner set noise control method according to claim 1, it is characterized in that, described method installs vibration isolation element between equipment and basis, on equipment pipe.
3. a kind of air-conditioner set noise control method according to claim 1, is characterized in that, described method carries out the parameter of Vibration Absorbing System Design, single-degree-of-freedom vibrating isolation system, the determination of vibration isolating effect and calculating.
4. a kind of air-conditioner set noise control method according to claim 3, is characterized in that, the parameter of described method Vibration Absorbing System Design comprises to be transmitted than the type of the type of, vibration insulating foundation, support weight ratio, vibration isolation element, specifications and models and arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410682962.XA CN104374073A (en) | 2014-11-25 | 2014-11-25 | Air conditioning unit noise control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410682962.XA CN104374073A (en) | 2014-11-25 | 2014-11-25 | Air conditioning unit noise control method |
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| CN104374073A true CN104374073A (en) | 2015-02-25 |
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ID=52553139
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| CN201410682962.XA Pending CN104374073A (en) | 2014-11-25 | 2014-11-25 | Air conditioning unit noise control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108986780A (en) * | 2017-05-31 | 2018-12-11 | 青岛海尔智能技术研发有限公司 | A kind of design method of the denoising device of household electrical appliance |
| CN108981130A (en) * | 2017-05-31 | 2018-12-11 | 青岛海尔智能技术研发有限公司 | A kind of design method of the denoising device of air-conditioning |
| CN109238611A (en) * | 2018-09-27 | 2019-01-18 | 广州供电局有限公司 | Vibration source detection method, device, computer equipment and storage medium |
| CN109409232A (en) * | 2018-09-27 | 2019-03-01 | 广州供电局有限公司 | Noise source detection method, device, computer equipment and storage medium |
| CN109708244A (en) * | 2018-12-26 | 2019-05-03 | 中国机械工业集团有限公司 | A kind of central air-conditioning condensing plant is to building noise hazard diagnosis and processing method |
-
2014
- 2014-11-25 CN CN201410682962.XA patent/CN104374073A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 刘欢等: "中央空调机房降噪技术的研究", 《工业安全与环保》 * |
| 张雪梅等: "中央空调***消声与减振的研究", 《制冷与空调》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108986780A (en) * | 2017-05-31 | 2018-12-11 | 青岛海尔智能技术研发有限公司 | A kind of design method of the denoising device of household electrical appliance |
| CN108981130A (en) * | 2017-05-31 | 2018-12-11 | 青岛海尔智能技术研发有限公司 | A kind of design method of the denoising device of air-conditioning |
| CN108981130B (en) * | 2017-05-31 | 2020-12-04 | 青岛海尔智能技术研发有限公司 | Design method of noise reduction device of air conditioner |
| CN108986780B (en) * | 2017-05-31 | 2021-11-02 | 青岛海尔智能技术研发有限公司 | Design method of noise reduction device of household appliance |
| CN109238611A (en) * | 2018-09-27 | 2019-01-18 | 广州供电局有限公司 | Vibration source detection method, device, computer equipment and storage medium |
| CN109409232A (en) * | 2018-09-27 | 2019-03-01 | 广州供电局有限公司 | Noise source detection method, device, computer equipment and storage medium |
| CN109238611B (en) * | 2018-09-27 | 2020-01-03 | 广州供电局有限公司 | Vibration source detection method and device, computer equipment and storage medium |
| CN109409232B (en) * | 2018-09-27 | 2020-04-10 | 广州供电局有限公司 | Noise source detection method, noise source detection device, computer equipment and storage medium |
| CN109708244A (en) * | 2018-12-26 | 2019-05-03 | 中国机械工业集团有限公司 | A kind of central air-conditioning condensing plant is to building noise hazard diagnosis and processing method |
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Application publication date: 20150225 |
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