CN103743082A - Noise reduction structure of air outlet of vehicle air conditioner - Google Patents
Noise reduction structure of air outlet of vehicle air conditioner Download PDFInfo
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- CN103743082A CN103743082A CN201310619579.5A CN201310619579A CN103743082A CN 103743082 A CN103743082 A CN 103743082A CN 201310619579 A CN201310619579 A CN 201310619579A CN 103743082 A CN103743082 A CN 103743082A
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- perforated plate
- air conditioner
- vehicle air
- sliding tube
- pipelines
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Abstract
A noise reduction structure of an air outlet of a vehicle air conditioner is arranged in a pipeline of the vehicle air conditioner and is close to the air outlet. The noise reduction structure comprises a fixed tube, a sliding tube and a honeycomb-shaped perforated plate, wherein one end of the fixed tube is provided with a closed ring, the closed ring is fixedly connected with the inner wall of the pipeline of the vehicle air conditioner, the fixed tube is sleeved with a spring and the sliding tube, the honeycomb-shaped perforated plate is fixed to one end of the sliding tube and is an annular plate, an air inlet is formed in the middle of the honeycomb-shaped perforated plate, honeycomb holes are evenly distributed in the annular area of the honeycomb-shaped perforated plate, the periphery of the honeycomb-shaped perforated plate is in sliding fit with the inner wall of the pipeline of the vehicle air conditioner, and the honeycomb-shaped perforated plate, the closed ring, the sliding tube, the fixed tube and the pipeline of the vehicle air conditioner form an annular cavity changeable in size. According to the noise reduction structure, the noise reduction frequency is automatically adjusted with changes of wind speed, and therefore the effect of reducing wideband radiation noise of the pipeline and the air outlet of the vehicle air conditioner is remarkable.
Description
Technical field
The present invention relates to a kind of air conditioning for automobiles parts, particularly vehicle air conditioning outlet denoising structure.
Background technology
Along with consumer improves day by day to reducing the requirement of Vehicle Interior Noise, raising riding comfort, reduce car noise and become the subject matter that raising car steering comfortableness need to solve.The noise level of driver's cabin is the important indicator of evaluating vehicle ride comfort, and wherein the noise of air-conditioning system is the important component part of internal car noise.During air conditioning for automobiles work; often can be because the noise that compressor of air conditioner, air blast, pipeline eddy current or other noise sources produce be delivered in car along air-conditioner air outlet; and the noise of air-conditioning duct can increase along with the raising of wind speed; particularly high-frequency noise composition is obviously outstanding; the noise that is radiated driver's cabin by air-conditioner air outlet can increase; to passenger, cause discomfort; and noise frequency often raises along with the increase of wind speed; change frequency band wider, to noise elimination noise reduction, work brings certain difficulty.At present, the noise reduction means that automotive air-conditioning system adopts is generally to come noise decrease to transmit in car by reducing the noise sources such as compressor or air blast, but this conventional means is difficult to suppress the noise that air-conditioning duct or miscellaneous part produce to be delivered in driver's cabin by air-conditioner air outlet, and still lacks the broadband noise giving off that effective technological means reduces air-conditioning duct and air outlet.
Summary of the invention
The object of the invention is to the drawback for prior art, provide a kind of frequency of noise elimination automatically to regulate along with the variation of wind speed, thereby reduce the vehicle air conditioning outlet denoising structure of pipelines of automobile air conditioner and air outlet wideband radiated noise.
Problem of the present invention realizes with following technical proposals:
A kind of vehicle air conditioning outlet denoising structure, its special feature is, described structure is arranged in pipelines of automobile air conditioner near air outlet place, this structure comprises stationary pipes, sliding tube and cellular perforated plate, described stationary pipes one end is provided with closed-loop, closed-loop and pipelines of automobile air conditioner inwall are fixed, pocketed springs outside stationary pipes; Described sliding canister is contained in stationary pipes outside, sliding tube one end fixed cellular shape perforated plate, cellular perforated plate is annular plate, its middle part is air inlet, the uniform honeycomb hole of annular section of cellular perforated plate, the periphery of cellular perforated plate and pipelines of automobile air conditioner inwall are slidably matched; Between cellular perforated plate, closed-loop, sliding tube, stationary pipes and pipelines of automobile air conditioner, form the annular housing of variable-volume.
Above-mentioned vehicle air conditioning outlet denoising structure, one end of described stationary pipes is provided with evagination limiting stand, and one end of described sliding tube is provided with convex limiting stand, and evagination limiting stand and convex limiting stand mutually fasten and form spacing to sliding tube.
Above-mentioned vehicle air conditioning outlet denoising structure, the thickness of slab of described cellular perforated plate is 2-5mm, and the aperture of honeycomb hole is 2-3mm, and the punching rate of honeycomb hole on cellular perforated plate is less than or equal to 5%.
Above-mentioned vehicle air conditioning outlet denoising structure, the area of described pipelines of automobile air conditioner is S1, the area of air inlet is S2, S2=(0.5-0.6) S1.
Above-mentioned vehicle air conditioning outlet denoising structure, the spacing B of described closed-loop and pipelines of automobile air conditioner air outlet is 20-50 millimeter.
Above-mentioned vehicle air conditioning outlet denoising structure, is also provided with slip ring in described stationary pipes, slip ring is between sliding tube and spring.
The present invention is directed to solve and reduce air conditioning for automobiles noise problem, at pipelines of automobile air conditioner air outlet, place is provided with a kind of denoising structure, and described structure forms the resonator with certain frequency by cellular perforated plate and the cavity connected, volume changes with wind speed.Resonator intrinsic frequency f=
, wherein V is cavity volume, because cellular perforated plate can, according to wind speed size automated movement, change cavity volume V, thereby reach the adjusting of resonator frequency f.When increasing, air-conditioning duct wind speed can cause that high-frequency noise composition is outstanding, now V value can reduce greatly because wind speed becomes, the reducing of volume V will cause resonator intrinsic frequency f to become large, thereby effectively suppress to produce high-frequency noise composition because wind speed increases, finally reduce the noise that changes the HFS producing in driver's cabin with wind speed.Frequency of noise elimination of the present invention, along with the variation of wind speed regulates automatically, therefore has obvious effect to reducing pipelines of automobile air conditioner and air outlet wideband radiated noise.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of sliding tube and cellular perforated plate;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the structural representation of stationary pipes and closed-loop;
Fig. 5 is the right view of Fig. 4.
In figure, each list of reference numerals is: 1, pipelines of automobile air conditioner, 2, cellular perforated plate, 2-1, honeycomb hole, 2-2, air inlet, 3, sliding tube, 3-1, convex limiting stand, 4, slip ring, 5, spring, 6, stationary pipes, 6-1, evagination limiting stand, 7, closed-loop, 8, ring-shaped cavity.
The specific embodiment
Referring to Fig. 1, it is interior near air outlet place that structure of the present invention is arranged on pipelines of automobile air conditioner 1, and this structure comprises stationary pipes 6, sliding tube 3 and cellular perforated plate 2.The outlet air end fixed closed ring 7 of stationary pipes 6 wherein, closed-loop is ring-type, and the internal diameter of closed-loop mates with the internal diameter of stationary pipes, and the periphery of closed-loop and pipelines of automobile air conditioner inwall close admittedly, and the spacing B of closed-loop and pipelines of automobile air conditioner air outlet is 20-50 millimeter.Described sliding tube 3 is sleeved on stationary pipes outside, sliding tube can move relative to stationary pipes, sliding tube air intake fixed cellular shape perforated plate 2, cellular perforated plate is annular plate, its middle part is air inlet 2-2, the uniform honeycomb hole 2-1 of annular section of cellular perforated plate, the periphery of cellular perforated plate and pipelines of automobile air conditioner inwall are slidably matched.The outside pocketed springs 5 of stationary pipes is provided with slip ring 4 between the right-hand member of sliding tube 3 and spring 5.Between cellular perforated plate, closed-loop, sliding tube, stationary pipes and pipelines of automobile air conditioner, form the ring-shaped cavity 8 of variable-volume.
Referring to Fig. 2, Fig. 3, cellular perforated plate 2 is connected by screw with sliding tube, at the right-hand member of sliding tube 3, is provided with convex limiting stand 3-1; Referring to Fig. 4, Fig. 5, the left end of stationary pipes 6 is provided with evagination limiting stand 6-1; Evagination limiting stand and convex limiting stand mutually fasten and form sliding tube the spacing of (while pulling open) that move to left.As seen from Figure 2, the internal diameter of air inlet 2-2 is less than the internal diameter of sliding tube, and this structure can form sliding tube the spacing of (during recovery) that move to right.
Referring to Fig. 1, Fig. 3, the thickness of slab of cellular perforated plate 2 is 2-5mm, and the aperture of honeycomb hole 2-1 is 2-3mm, and the punching rate of honeycomb hole on cellular perforated plate is less than or equal to the gross area S3 that 5%(is hole on honeycomb perforated plate, the gross area of cellular perforated plate is S4, S3/S4≤5%).The area of pipelines of automobile air conditioner 1 is S1, and the area of air inlet 2-2 is S2, S2=(0.5-0.6) S1.Above-mentioned size can guarantee to bring into play the effect of honeycomb hole, can not affect again the circulation of air-conditioner wind.
Still referring to Fig. 1, when the present invention works, the frequency of noise elimination of ring-shaped cavity 8 is determined by parameters such as the perforated sections of cellular perforated plate, ring-shaped cavity volume, cellular perforated plate are long-pending.Because cellular perforated plate 2 can move forward and backward along air-conditioning duct with the size of air conditioner wind speed, so ring-shaped cavity volume is variable.When air-conditioning duct wind speed is 0, cellular perforated plate 2 is positioned at the initial position shown in Fig. 1, now the volume of ring-shaped cavity is maximum, increase along with wind speed, the pressure that cellular perforated plate front area increases can make cellular perforated plate move right along air-conditioning duct Compress Spring, and finally reaches an equilbrium position.The variation of ring-shaped cavity 8 volumes, frequency of noise elimination also can along with variation and realize automatic adjusting.
Resonator formula for natural frequency f=
, wherein, f is resonator intrinsic frequency, and S is cellular perforated plate sectional area, and V is cavity volume, and L is cellular perforated plate thickness.In above-mentioned parameter of the present invention, ring-shaped cavity volume V is variable, and cellular perforated plate can change cavity volume V according to wind speed size is mobile, thereby reaches the adjusting of resonator frequency f.When air velocity duct increase causes that high-frequency noise composition is given prominence to, ring-shaped cavity volume V value can reduce greatly because wind speed becomes, volume V diminishes and makes resonator intrinsic frequency f become large, thereby effectively suppress to produce high-frequency noise composition because wind speed increases the final driver's cabin noise that changes the HFS producing with wind speed that reduces.
Claims (6)
1. a vehicle air conditioning outlet denoising structure, it is characterized in that, described structure is arranged in pipelines of automobile air conditioner (1) near air outlet place, this structure comprises stationary pipes (6), sliding tube (3) and cellular perforated plate (2), described stationary pipes one end is provided with closed-loop (7), closed-loop and pipelines of automobile air conditioner inwall are fixed, pocketed springs (5) outside stationary pipes; Described sliding canister is contained in stationary pipes outside, sliding tube one end fixed cellular shape perforated plate, cellular perforated plate is annular plate, its middle part is air inlet (2-2), the uniform honeycomb hole of annular section (2-1) of cellular perforated plate, the periphery of cellular perforated plate and pipelines of automobile air conditioner inwall are slidably matched; Between cellular perforated plate, closed-loop, sliding tube, stationary pipes and pipelines of automobile air conditioner, form the annular housing (8) of variable-volume.
2. vehicle air conditioning outlet denoising structure according to claim 1, it is characterized in that, one end of described stationary pipes (6) is provided with evagination limiting stand (6-1), one end of described sliding tube (3) is provided with convex limiting stand (3-1), and evagination limiting stand and convex limiting stand mutually fasten and form spacing to sliding tube.
3. vehicle air conditioning outlet denoising structure according to claim 2, is characterized in that, the thickness of slab of described cellular perforated plate (2) is 2-5mm, and the aperture of honeycomb hole (2-1) is 2-3mm, and the punching rate of honeycomb hole on cellular perforated plate is less than or equal to 5%.
4. vehicle air conditioning outlet denoising structure according to claim 3, is characterized in that, the area of described pipelines of automobile air conditioner (1) is S1, and the area of air inlet (2-2) is S2, S2=(0.5-0.6) S1.
5. vehicle air conditioning outlet denoising structure according to claim 4, is characterized in that, the spacing B of described closed-loop and pipelines of automobile air conditioner air outlet is 20-50 millimeter.
6. vehicle air conditioning outlet denoising structure according to claim 5, is characterized in that, is also provided with slip ring (4) in described stationary pipes, and slip ring is positioned between sliding tube (3) and spring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310619579.5A CN103743082B (en) | 2013-11-29 | 2013-11-29 | A kind of vehicle air conditioning outlet denoising structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310619579.5A CN103743082B (en) | 2013-11-29 | 2013-11-29 | A kind of vehicle air conditioning outlet denoising structure |
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| CN103743082A true CN103743082A (en) | 2014-04-23 |
| CN103743082B CN103743082B (en) | 2016-08-17 |
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| CN201310619579.5A Expired - Fee Related CN103743082B (en) | 2013-11-29 | 2013-11-29 | A kind of vehicle air conditioning outlet denoising structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551477A (en) * | 2015-12-22 | 2016-05-04 | 杭叉集团股份有限公司 | Adjustable noise reduction box |
| CN110397572A (en) * | 2019-08-28 | 2019-11-01 | 珠海格力电器股份有限公司 | Muffler, compressor and air conditioner |
| CN110568015A (en) * | 2019-08-02 | 2019-12-13 | 安徽理工大学 | Gas explosion characteristic parameter testing device |
| CN110614901A (en) * | 2018-06-19 | 2019-12-27 | 保时捷股份公司 | Air conditioning system for a motor vehicle |
| US10532631B2 (en) | 2017-03-29 | 2020-01-14 | Ford Global Technologies, Llc | Acoustic air duct and air extraction system including a plurality of channels having an expansion chamber |
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| US5326317A (en) * | 1991-10-18 | 1994-07-05 | Matsushita Seiko Co., Ltd. | Ventilator |
| CN201359356Y (en) * | 2009-03-02 | 2009-12-09 | 上海加冷松芝汽车空调股份有限公司 | Automobile air conditioning device |
| CN201909416U (en) * | 2010-12-07 | 2011-07-27 | 宁波永成双海汽车部件有限公司 | Toggle device of air outlet of automotive air conditioning |
| CN201914261U (en) * | 2010-12-21 | 2011-08-03 | 石家庄国祥运输设备有限公司 | Air-conditioning ventilation device for high-speed track vehicle |
| CN102853515A (en) * | 2012-09-03 | 2013-01-02 | 北京科奥克声学技术有限公司 | Broadband sound absorption air tube and air opening |
-
2013
- 2013-11-29 CN CN201310619579.5A patent/CN103743082B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5326317A (en) * | 1991-10-18 | 1994-07-05 | Matsushita Seiko Co., Ltd. | Ventilator |
| CN201359356Y (en) * | 2009-03-02 | 2009-12-09 | 上海加冷松芝汽车空调股份有限公司 | Automobile air conditioning device |
| CN201909416U (en) * | 2010-12-07 | 2011-07-27 | 宁波永成双海汽车部件有限公司 | Toggle device of air outlet of automotive air conditioning |
| CN201914261U (en) * | 2010-12-21 | 2011-08-03 | 石家庄国祥运输设备有限公司 | Air-conditioning ventilation device for high-speed track vehicle |
| CN102853515A (en) * | 2012-09-03 | 2013-01-02 | 北京科奥克声学技术有限公司 | Broadband sound absorption air tube and air opening |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105551477A (en) * | 2015-12-22 | 2016-05-04 | 杭叉集团股份有限公司 | Adjustable noise reduction box |
| CN105551477B (en) * | 2015-12-22 | 2019-03-01 | 杭叉集团股份有限公司 | Adjustable noise reduction box |
| US10532631B2 (en) | 2017-03-29 | 2020-01-14 | Ford Global Technologies, Llc | Acoustic air duct and air extraction system including a plurality of channels having an expansion chamber |
| CN110614901A (en) * | 2018-06-19 | 2019-12-27 | 保时捷股份公司 | Air conditioning system for a motor vehicle |
| CN110568015A (en) * | 2019-08-02 | 2019-12-13 | 安徽理工大学 | Gas explosion characteristic parameter testing device |
| CN110397572A (en) * | 2019-08-28 | 2019-11-01 | 珠海格力电器股份有限公司 | Muffler, compressor and air conditioner |
| CN110397572B (en) * | 2019-08-28 | 2023-02-28 | 珠海格力电器股份有限公司 | Silencer, compressor and air conditioner |
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| Publication number | Publication date |
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| CN103743082B (en) | 2016-08-17 |
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