CN105737358A - Ventilating and sound attenuating system for sound attenuating chamber - Google Patents
Ventilating and sound attenuating system for sound attenuating chamber Download PDFInfo
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- CN105737358A CN105737358A CN201410750913.5A CN201410750913A CN105737358A CN 105737358 A CN105737358 A CN 105737358A CN 201410750913 A CN201410750913 A CN 201410750913A CN 105737358 A CN105737358 A CN 105737358A
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Abstract
The invention discloses a ventilating and sound attenuating system for a sound attenuating chamber. The ventilating and sound attenuating system is composed of an air conditioner air inlet sound attenuating system and an air outlet sound attenuating system. The air conditioner air inlet sound attenuating system is composed of a ventilating air conditioner room, an air supply fan, an air inlet static pressure sound attenuating box, an air supply composite air pipe, a flexible vibration isolation flange, an impedance composite right-angle silencer and a flow diffusion air inlet sound attenuating air opening. The air outlet sound attenuating system is composed of an internal air outlet disk type sound attenuating air opening, an impedance composite right-angle silencer, a flexible vibration isolation flange, an induced air composite air pipe, an induced draft fan and an induced draft fan vibration isolation mounting rack. The ventilating and sound attenuating system can carry out continuous and normal detection operation when a sound attenuating chamber air conditioning system is started up, and the influence of noise of the sound attenuating chamber air conditioning system on the value of background noise in the sound attenuating chamber is eliminated.
Description
Technical field
The present invention relates to a kind of noise control technique field, especially dead room ventilation sound-attenuating system.
Background technology
Dead room includes whole elimination room and semianechoic room, and a special experimental laboratory of acoustical testing is not only by dead room, and is the important component part of test system, and it is also one of acoustic test equipment, and its acoustical behavior index directly affects the precision of test.The key technology of dead room and the key technical indexes are high oise insulation factors, make to reach in dead room low noise environment, and in dead room, background noise value is more low, and test effect is more good.Along with the variation of test sample, the sound level of test requires more and more lower.Owing to the noise of dead room surrounding is inevitable, if the environment noise around dead room is 65dB(A), in dead room, background noise value requires 15dB(A), then the oise insulation factor of dead room building enclosure answers >=50dB(A).
The testing staff of noise elimination office work, should ensure that their working condition.The new wind of the 6.6.1 working space according to " Design of Industrial Enterprises sanitary standard " basic hygienic requirements in GBZ1-2010 the 6th chapter working space should from outdoor, fresh wind port should be arranged on air cleaner district, resh air requirement should meet following requirements: non-air-conditioning working space accounts for the workshop of volume < 20m3 per capita, should ensure that the amount of fresh air per person >=30m3/h；During such as shared volume > 20m3, should ensure that the amount of fresh air per person >=20m3/h；The workshop adopting air to regulate, should ensure that the amount of fresh air per person >=30m3/h, and the amount of fresh air per person of toilet answers >=40m3/h.The ventilation system should being equipped with for this dead room should meet the requirement of the amount of fresh air per person.Due to the existence of ventilation system, also form the route of transmission of noise, define the weak link of dead room building enclosure sound insulation.
According to selecting and the design of 4.3.5 article of acoustic hood of design of " Code for design of noise cintrol in industrial enterprises " GB/T50087-2013 chapter 4 sound insulation Section of three sound insulating structure of design, following regulation should be observed: five ... ... all of ventilation, smoke evacuation and production technology opening, all should being provided with acoustic filter, its sound deadening capacity should be suitable with the oise insulation factor of acoustic hood.The sound deadening capacity of dead room ventilation system acoustic filter answers >=50dB(A).
Eliminate the noise according to " Code for design of noise cintrol in industrial enterprises " GB/T50087-2013 chapter 5 and design the sound deadening capacity of first segment 5.1.3 article of acoustic filter of general provision, should determine according to noise elimination requirement.It is commonly designed sound deadening capacity, no more than 50dB.
Noise control according to the public professional 7.1 HVAC system design 7.1.3 air conditioning systems of " dead room and semianechoic room technical specification " GB50800-20127 ... the noise reduction sound-deadening design of 2 heating ventilation and air-conditioning systems should according to dead room permitted noise level in room, and noise of equipment value, vibrations size, frequency characteristic and transmission system noise factors are determined.
Background noise according to " dead room and semianechoic room technical specification " GB50800-20123 acoustic design 3.1 general provision 3.1.4 dead room or semianechoic room.Should determine according to test content and test request.This noise floor value is not singly overall level value, also should provide the permission sound pressure level value of each frequency band.
Owing to the noise floor value of dead room is not singly overall level value, the permission sound pressure level value of each frequency band also should be provided.And according to mass law of sound insulation, the material defening effect that namely quality is more high, more thick and heavy is more good, surface density is proportional with oise insulation factor.Frequency reduces half, and 6dB (A) to drop in transmission loss；And quality doubles, transmission loss will increase 6dB (A).And the requirement that dead room is to cut-off frequency, cause the requirement of the background noise to low frequency.Thus the isolation of the low-frequency noise of the noise elimination ventilation system of dead room, absorption are proposed significantly high requirement.
The low-frequency noise sound deadening capacity of current dead room ventilation system is the principal element of restriction dead room background noise reduction.
Summary of the invention
In order to overcome the impact of background noise value in existing ventilation system noise cancellation sound chamber, the present invention provides a kind of dead room ventilation sound-attenuating system, this ventilation sound-attenuating system can eliminate the impact of low-frequency noise effectively, meets the requirement of low frequency background noise value in dead room.
The technical solution adopted for the present invention to solve the technical problems is: a kind of dead room ventilation sound-attenuating system, is made up of air-conditioning air intake sound-attenuating system, air outlet silencing system.Air-conditioning air intake sound-attenuating system is made up of Air Conditioning Facilities, breeze fan, air intake static pressure silencer box, air-supply composite air duct, flexible vibration isolation flange, impedance complex right-angled muffler, diffusing air intake noise attenuated outlet；Air outlet silencing system is made up of interior air-out disc type noise attenuated outlet, impedance complex right-angled muffler, flexible vibration isolation flange, air inducing composite air duct, air-introduced machine, air-introduced machine shock proof mounting rack.
Described Air Conditioning Facilities are independently arranged at by dead room, by full air by breeze fan successive air intake static pressure silencer box, outer air-supply composite air duct, impedance complex right-angled muffler, interior air-supply composite air duct, diffusing air intake noise elimination mouth, dead room indoor；It is respectively provided with flexible vibration isolation flange with the interface of interior air-supply composite air duct inside described outer air-supply composite air duct and the outer sound insulating structure of dead room, the outer sound insulating structure of dead room；Described impedance complex right-angled muffler, interior air-supply composite air duct are arranged in dead room between sound insulating structure, outer sound insulating structure.
Described impedance complex right-angled muffler, interior air-supply composite air duct are arranged in dead room between sound insulating structure, outer sound insulating structure.Can prevent low-frequency noise from entering inside acoustic filter from muffler shell.
Flexible vibration isolation flange-interface is set, can prevent the gap that low-frequency noise passes through between outer sound insulating structure and composite air duct from entering in dead room between sound insulating structure, outer sound insulating structure, affect the background noise of dead room.
Described air-introduced machine shock proof mounting rack is independently arranged at by dead room, air-introduced machine and air inducing composite air duct are by flexible vibration isolation Flange joint, impedance complex right-angled muffler is arranged on the outer sound insulating structure of dead room, is connected with the interior air-out disc type noise elimination mouth being arranged in dead room on sound insulating structure by impedance complex right-angled muffler, the air inducing composite air duct being arranged in dead room between sound insulating structure, outer sound insulating structure.The combination of the resistance noise reduction structure of impedance complex right-angled muffler and right angle reactive muffling structure can reach the purpose that full range is eliminated the noise, and chip sound absorber two ends are provided with the arc water conservancy diversion sound absorber of circular shape and right angle reactive muffling structure and contribute to the improvement of aerodynamic quality.Impedance complex right-angled muffler, composite air duct are arranged in dead room between sound insulating structure, outer sound insulating structure, can prevent low-frequency noise from entering inside acoustic filter from muffler shell.
The blast of described breeze fan more than air-conditioning air intake sound-attenuating system along journey air loss and local blast, the blast of described air inducing blower fan more than air outlet silencing system along journey air loss and local blast, the blast allowance of breeze fan is more than the blast allowance of air inducing blower fan, during dead room work, indoor in normality barotropic state, air quantity meet everyone >=standard of 30m3.Owing to dead room ventilation sound-attenuating system arranges multiple acoustic filter, local air loss is big, if only having air intake or air-out blower fan, it is difficult to meet instructions for use, so air intake, air-out are respectively provided with blower fan mechanical air supply.During dead room work, indoor in normality barotropic state (room air pressure is more than ambient atmospheric pressure), it is prevented that for preventing outdoor undressed air from entering dead room interference room conditioning parameter.
Described composite air duct is by application damping layer material in galvanized sheet outer tube, airduct in liner composite glass fiber plate.Application damping material in galvanized sheet outer tube, can improve the low-frequency noise oise insulation factor of galvanized sheet outer tube, the Glass-Fiber Board Air Duct of liner, has good sound absorbing capabilities, improves the sound insulation of compound ajutage, acoustical absorptivity.
Air-introduced machine shock proof mounting rack is arranged on noise elimination outdoor ground.Spring hanger link is used to link between air-introduced machine and air-introduced machine installing rack.Fan installation frame is not connected with the outer sound insulating structure of dead room, in order to prevent the solid transmission of vibration.
The invention has the beneficial effects as follows, the sound deadening capacity of ventilation sound-attenuating system can be suitable with the oise insulation factor of dead room.When dead room air handling system is started shooting, can continue, normally carry out detection work, overcome the impact of background noise value in the noise cancellation sound chamber of dead room air handling system.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the vertical section structural map of dead room ventilation sound-attenuating system embodiment.
Fig. 2 is the vertical view cutaway drawing of Fig. 1.
Fig. 3 is compound ajutage vertical section structural map.
1. air conditioner machine room, 2. breeze fan in figure, 3. air intake static pressure silencer box, 4. composite air duct, 5. flexible vibration isolation flange, 6. impedance complex right-angled muffler, 7. diffusing air intake noise elimination mouth, 8. wind disc type noise attenuated outlet, 9. air-introduced machine, 10. shock proof mounting rack, 11. dead rooms are indoor, 12. outer sound insulating structures, 13. interior sound insulating structure, 14. galvanized sheets, 15. damping layers, 16. composite glass fiber plate, 17. ground.
Detailed description of the invention
In the embodiment shown in fig. 1, a kind of dead room ventilation sound-attenuating system, it is made up of air-conditioning air intake sound-attenuating system, air outlet silencing system.Air-conditioning air intake sound-attenuating system is made up of air conditioner machine room (1), breeze fan (2), air intake static pressure silencer box (3), air-supply composite air duct (4), flexible vibration isolation flange (5), impedance complex right-angled muffler (6), diffusing air intake noise attenuated outlet (7)；Air outlet silencing system is made up of interior air-out disc type noise attenuated outlet (8), impedance complex right-angled muffler (6), flexible vibration isolation flange (5), air inducing composite air duct (4), air-introduced machine (9), air-introduced machine shock proof mounting rack (10).
Described air conditioner machine room (1) is independently arranged at by dead room, by air by breeze fan (2) successive air intake static pressure silencer box (3), outer air-supply composite air duct (4), impedance complex right-angled muffler (6), interior air-supply composite air duct (4), diffusing air intake noise elimination mouth (7), dead room indoor (11)；Described outer air-supply composite air duct (4) is respectively provided with flexible vibration isolation flange (5) with the outer sound insulating structure (12) of dead room, dead room outer sound insulating structure (12) inner side with the interface of interior air-supply composite air duct (4)；Described impedance complex right-angled muffler (6), interior compound ajutage (4) are arranged in dead room between sound insulating structure (13), outer sound insulating structure (12).Described air-introduced machine shock proof mounting rack (10) is independently arranged at by dead room, air-introduced machine (9) is connected by flexible vibration isolation flange (5) with air inducing composite air duct (4), outer air outlet silencing device (1) is arranged on the outer sound insulating structure (12) of dead room, is connected with interior air-out disc type noise elimination mouth (8) being arranged in dead room on sound insulating structure (13) by impedance complex right-angled muffler (6), the air inducing composite air duct (4) being arranged in dead room between sound insulating structure (13), outer sound insulating structure (12).
The blast of described breeze fan (2) more than air-conditioning air intake sound-attenuating system along journey air loss and local blast, the blast of described air inducing blower fan (9) more than air outlet silencing system along journey air loss and local blast, the blast allowance of breeze fan (2) is more than the blast allowance of air inducing blower fan (9), during dead room work, indoor in normality barotropic state, air quantity meet everyone >=standard of 30m3.Described composite air duct (4), by application damping layer (15) in galvanized sheet (14) outer tube, is managed in liner composite glass fiber plate (16).Air-introduced machine shock proof mounting rack (10) is arranged on noise elimination outdoor ground (17).
Dead room air flow: Air Conditioning Facilities (1) (regulate temperature, humidity, the past outdoor discharge of indoor (11) → air-out disc type noise attenuated outlet (8) → interior air inducing composite air duct (4) → impedance complex right-angled muffler (6) → outer air inducing composite air duct (4) → flexibility vibration isolation flange (5) → air-introduced machine (the 9) → waste gas of) → breeze fan (2) → air intake static pressure silencer box (3) → composite air duct (4) of blowing outward → flexibility vibration isolation flange (5) → impedance complex right-angled muffler (6) → interior air-supply composite air duct (4) → diffusing air intake noise attenuated outlet (7) → dead room.
Should be appreciated that without departing from the scope of the present invention, it is possible to above-described embodiment is made multiple combination and change.All any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (6)
1. a dead room ventilation sound-attenuating system, it is made up of air-conditioning air intake sound-attenuating system, air outlet silencing system, it is characterized in that: air-conditioning air intake sound-attenuating system is made up of air conditioner machine room, breeze fan, air intake static pressure silencer box, air-supply composite air duct, flexible vibration isolation flange, impedance complex right-angled muffler, diffusing air intake noise attenuated outlet；Air outlet silencing system is made up of interior air-out disc type noise attenuated outlet, impedance complex right-angled muffler, flexible vibration isolation flange, air inducing composite air duct, air-introduced machine, air-introduced machine shock proof mounting rack.
2. the air conditioner machine room described in is independently arranged at by dead room, by full air by breeze fan successive air intake static pressure silencer box, outer air-supply composite air duct, impedance complex right-angled muffler, interior air-supply composite air duct, diffusing air intake noise elimination mouth, dead room indoor；It is respectively provided with flexible vibration isolation flange with the interface of interior air-supply composite air duct inside described outer air-supply composite air duct and the outer sound insulating structure of dead room, the outer sound insulating structure of dead room；Described impedance complex right-angled muffler, interior air-supply composite air duct are arranged in dead room between sound insulating structure, outer sound insulating structure.
3. dead room ventilation sound-attenuating system according to claim 1, it is characterized in that: described air-introduced machine shock proof mounting rack is independently arranged at by dead room, air-introduced machine and air inducing composite air duct by flexible vibration isolation Flange joint, are connected with the interior air-out disc type noise elimination mouth being arranged in dead room on sound insulating structure by impedance complex right-angled muffler, the air inducing composite air duct being arranged in dead room between sound insulating structure, outer sound insulating structure.
4. dead room ventilation sound-attenuating system according to claim 1, it is characterized in that: the blast of described breeze fan more than air-conditioning air intake sound-attenuating system along journey air loss and local blast, the blast of described air inducing blower fan more than air outlet silencing system along journey air loss and local blast, the blast allowance of breeze fan is more than the blast allowance of air inducing blower fan, during dead room work, indoor in normality barotropic state, air quantity meet everyone >=standard of 30m3.
5. dead room ventilation sound-attenuating system according to claim 1, is characterized in that: described composite air duct is by application damping material in galvanized sheet outer tube, liner Glass-Fiber Board Air Duct.
6. dead room ventilation sound-attenuating system according to claim 1, is characterized in that: air-introduced machine shock proof mounting rack is arranged on noise elimination outdoor ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410750913.5A CN105737358A (en) | 2014-12-10 | 2014-12-10 | Ventilating and sound attenuating system for sound attenuating chamber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410750913.5A CN105737358A (en) | 2014-12-10 | 2014-12-10 | Ventilating and sound attenuating system for sound attenuating chamber |
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| CN105737358A true CN105737358A (en) | 2016-07-06 |
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| CN201410750913.5A Pending CN105737358A (en) | 2014-12-10 | 2014-12-10 | Ventilating and sound attenuating system for sound attenuating chamber |
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| CN202747575U (en) * | 2012-07-02 | 2013-02-20 | 厦门嘉达声学技术工程有限公司 | Air inlet and outlet silencing system |
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2014
- 2014-12-10 CN CN201410750913.5A patent/CN105737358A/en active Pending
Patent Citations (6)
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| JP2003343236A (en) * | 2002-05-31 | 2003-12-03 | Daiko Sangyo:Kk | Low frequency sound damping method and device |
| CN201121402Y (en) * | 2007-08-27 | 2008-09-24 | 成都展望能源机械有限公司 | Internally concealed air exhausting soundproofing channel |
| CN201650452U (en) * | 2010-04-22 | 2010-11-24 | 任小平 | Silencing device of diesel generating set |
| CN102522079A (en) * | 2012-01-10 | 2012-06-27 | 厦门嘉达环保建造工程有限公司 | Impedance compound right-angled muffler |
| CN202747575U (en) * | 2012-07-02 | 2013-02-20 | 厦门嘉达声学技术工程有限公司 | Air inlet and outlet silencing system |
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| Title |
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| 刘天川: "《超高层建筑空调设计》", 30 April 2002, 中国建筑工业出版社 * |
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Application publication date: 20160706 |
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