CN102721164A - Control device for reducing noise of indoor cabinet of air conditioner - Google Patents
Control device for reducing noise of indoor cabinet of air conditioner Download PDFInfo
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- CN102721164A CN102721164A CN2012101384442A CN201210138444A CN102721164A CN 102721164 A CN102721164 A CN 102721164A CN 2012101384442 A CN2012101384442 A CN 2012101384442A CN 201210138444 A CN201210138444 A CN 201210138444A CN 102721164 A CN102721164 A CN 102721164A
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- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
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Abstract
A control device for reducing noise of an indoor cabinet of an air conditioner comprises an air outlet arranged on the indoor cabinet and an air outlet plate connected with the air outlet, wherein pressurized airflow passes through the air outlet plate and then is sent out of the indoor cabinet from the air outlet, and micropores and/or micro gaps are/is formed in the air outlet plate. The porosity of the micropores and/or microgaps is 3-5%. The micropores are arranged in a square or regular triangle. The diameter of the micropore is 1 mm-2 mm; and/or the width of the micro gap is 1 mm-2 mm. The micro-gaps are transversely arranged, longitudinally arranged, obliquely arranged or crosswise arranged. The rear of the air outlet plate is provided with a cavity. The thickness of the cavity is 5-20 cm. The outward side of the cavity is provided with a sound absorption layer. The invention has the characteristics of simple and reasonable structure, easy processing, low noise, wide application range, high sound absorption coefficient and wide sound absorption frequency, and can effectively reduce the noise of the indoor cabinet of the air conditioner.
Description
Technical field
The present invention relates to a kind of control device that reduces cabinet-type air conditioner noise in the air conditioner chamber.
Background technology
Cabinet-type air conditioner is widely used in environment such as people's daily life and modern handle official bussiness in the air conditioner chamber.Although in present most of air conditioner chamber cabinet-type air conditioner noise objective be lower than national standard,, the noise that the cabinet-type air conditioner running time is produced in the air conditioner chamber still seems bigger than normal, can not satisfy user's requirement.The noise that indoor cabinet-type air conditioner produced comprises mechanical noise and pneumatic noise; Pneumatic noise is much larger than mechanical noise, and pneumatic noise mainly is made up of inlet noise, fan noise (comprising rotational noise and vortex noise), heat exchange evaporimeter noise and exhaust outlet noise.
The ducting system of cabinet-type air conditioner is made up of centrifugal blower in traditional air conditioner chamber; Air-flow is got into by the air port, both sides of the air intake panel of indoor cabinet-type air conditioner; Behind the centrifugation blade acting of centrifugal blower and 90 degree that commutate, flow to the spiral case of centrifugal blower, flow out after the evaporimeter of the indoor cabinet-type air conditioner of process and the wind outlet panel at last.In order to reduce pneumatic noise, effective method is the rotating speed that reduces centrifugal blower, still; The rotating speed that has reduced centrifugal blower has also just reduced the total head of centrifugal blower; As do not carry out other and change, certainly will reduce the air circulation of indoor cabinet-type air conditioner, influence the refrigeration performance of air-conditioner.
For this reason; Improvement has been made by the research unit and the manufacturer of many air-conditioners; Disclose a kind of fans drive structure that reduces cabinet-type air conditioner draft noise in the air conditioner chamber on 06 19th, 2002 like Chinese patent document number CN2495946Y, it passes through the structure and the electrical installation of adjustment centrifugal fan, thereby under air circulation and the nondecreasing prerequisite of heat exchange efficiency thereof; Reduce the charge air flow noise, but this technical scheme is difficult to carry out in engineering and uses.
The Chinese patent document number CN2864457Y wind deflector that disclosed a kind of cabinet type air conditioner indoor set on 31st in 01 month in 2007 and for example; It is employed in the wind deflector that inner top angular region, cabinet-type air conditioner chamber installs arc surface additional; Make air-flow in uphill process because the face effect of circular arc wind-guiding and smooth and easy outflow; Eliminated eddy airstream, reduced the air-supply noise, but actual reduction noise effects is relatively poor.
Chinese patent document number CN201314639Y discloses a kind of cabinet type air conditioner indoor set on 09 23rd, 2009 for another example; It is through tongue portion is provided with several blind holes in the whirlpool of spiral case; Utilize a plurality of blind hole resonant structures to reduce noise, but actual noise reduction is also relatively poor.And other; Such as the technical measures of noise reductions such as traditional inclination whirlpool tongue technology, adjusting centrifugal impeller external diameter and whirlpool tongue room technology, sound absorption spiral case technology indoor cabinet-type air conditioner is carried out noise reduction and reached a limit; So seek a kind of method and apparatus that reduces indoor cabinet-type air conditioner noise simply and effectively; And then improve its design, improve its quality, to the new market of developing air-conditioning with consolidate the existing market and have very important meaning.
Summary of the invention
The object of the invention aims to provide a kind of simple and reasonable, control device of being prone to cabinet-type air conditioner noise in processing, the noise reduction air conditioner chamber low, applied widely, to overcome weak point of the prior art.
A kind of control device that reduces cabinet-type air conditioner noise in the air conditioner chamber by this purpose design; Comprise the air outlet that is arranged on the indoor cabinet-type air conditioner and go out aerofoil with air outlet joins; After going out aerofoil, see indoor cabinet-type air conditioner from air outlet through the air-flow after the pressurization, its architectural feature is aerofoil to be provided with micropore and/or micro chink.
The porosity of said micropore and/or micro chink is 3%～5%.
Said micropore is square or equilateral triangle is arranged.
The diameter of said micropore is 1mm～2mm; And/or the width of micro chink is 1mm～2mm.
Said micro chink horizontally set, vertically setting, oblique setting or arranged in a crossed manner.
The said back that goes out aerofoil is provided with cavity.
The thickness of said cavity is 5～20cm.
A side outwardly of said cavity is provided with absorbent treatment.
After the present invention adopts above-mentioned technical scheme; Because being provided with the aerofoil that of micropore and/or micro chink is microperforated panel soundabsorbing construction; And microperforated panel soundabsorbing construction is the resonance sound-absorbing structure of a kind of matter in a low voice, high acoustic resistance, and its performance is between sound-absorbing porous material and resonance sound-absorbing structure, and its sound sucting band width can be superior to conventional perforation board resonance sound absorption structure; Have the high and wide characteristics of sound absorption frequency of acoustic absorptivity, can reduce cabinet-type air conditioner noise in the air conditioner chamber effectively.
Microperforated panel among the present invention can be processed with multiple material; Like aluminium sheet, steel plate, galvanized sheet, corrosion resistant plate, plastic plate or the like material; And the air layer behind the microperforated panel can need not to load sound-absorbing porous material, therefore not water funk and moisture, not mould, do not eat into, cleanliness without any pollution, the impact that can bear high velocity air; Therefore, microperforated panel soundabsorbing construction is in sqouynd absorption lowering noise with improve to have aspect the indoor tone quality very and use widely.
Simple and reasonable, easy processing that the present invention has, low, the advantage of wide range of application of noise.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention.
Fig. 2 is a first embodiment of the present invention structural representation.
Sketch map when Fig. 3 is square arrangement for micropore.
Sketch map when Fig. 4 arranges for micropore is equilateral triangle.
Fig. 5 looks sketch map for the master of Fig. 2.
Fig. 6 is that A-A among Fig. 5 is to cross-sectional schematic.
Fig. 7 is the C place enlarged diagram among Fig. 5.
Fig. 8 is the B place enlarged diagram among Fig. 6.
Fig. 9 is the second example structure sketch map.
Figure 10 looks sketch map for the master of Fig. 9.
Figure 11 is that D-D among Figure 10 is to cross-sectional schematic.
Figure 12 is the E place enlarged diagram among Figure 10.
Among the figure: 1 is air outlet, and 2 for going out aerofoil, and 2.1 is micropore, and 2.2 is micro chink, and 3 is cavity, and 4 is absorbent treatment.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
First embodiment
Referring to Fig. 1-Fig. 8; The control device of cabinet-type air conditioner noise in this reduction air conditioner chamber; Comprise the air outlet 1 that is arranged on the indoor cabinet-type air conditioner and go out aerofoil 2, see indoor cabinet-type air conditioner through going out aerofoil 2 backs off from air outlet 1, go out aerofoil 2 and be provided with micropore 2.1 through the air-flow after the pressurization with air outlet 1 joins.
The porosity of micropore 2.1 is 3%～5%.So-called porosity is the ratio that perforated area accounts for the orifice plate area.The diameter of micropore 2.1 is 1mm～2mm.
The back that goes out aerofoil 2 is provided with cavity 3.It is out-of-date to utilize sound wave to pass, the air sound energy consumption that in aperture, rubs back and forth, and utilize the size of cavity to control the resonant frequency at peak, and cavity is big more, and resonant frequency is low more.The thickness of cavity 3 is 5～20cm.
This moment go out aerofoil 2, also can be called the micropore orifice plate, can be regarded as the parallel connection of a large amount of microtubules or micropunch; Each micropunch is a very thin short tube, and is for a long time more very large than the aperture in pitch of holes, can suppose that the characteristic in each hole is independent of each other; The acoustic impedance of microperforated panel equals the acoustic impedance of single hole simply divided by hole count, and when sound wave was propagated in pipe, influence particle vibration velocity vertically on tube wall of considering viscosity was zero; Vibration velocity on central shaft is maximum, has velocity gradient along radial direction in the pipe, on the other hand; Littler when a lot of than wavelength in pitch of holes, orifice plate also can be ignored in the face of the reflection of sound wave.
As shown in Figure 1, the diameter of micropore is d, and the degree of depth of cavity is h, and the thickness of micropore orifice plate is that t and porosity are p.
The acoustics person's character of microperforated panel soundabsorbing construction is its acoustic impedance, and it has determined the acoustical behavior index of sound absorption structure in fact just, orifice plate sound absorption structure as shown in Figure 1, and its acoustic impedance Z is:
Wherein: r is the orifice plate specific acoustic resistance, and its value is:
λ is the orifice plate specific acoustic reactance, and its value is:
In the formula, ω is the angular frequency of incident, and c is the medium velocity of sound, and μ is the air coefficient of viscosity, and ρ is an atmospheric density, and p is a porosity;
K is the medium wave number
When the normal incidence of sound absorption structure, acoustic absorptivity α
NFor:
Acoustic absorptivity is the function of structural parameters and frequency, and for ad hoc structure, acoustic absorptivity changes with the variation of frequency.Acoustic reactance is zero when system resonance, and acoustic absorptivity reaches maximum, and corresponding resonant frequency is f, and the maximum acoustic absorptivity during resonance is:
When the non-normal incidence of microperforated panel soundabsorbing construction, promptly sound wave becomes the oblique incidence of θ angle with normal, and then the acoustic absorptivity of this moment is:
The acoustical behavior index of microperforated panel soundabsorbing construction is generally represented with acoustic absorptivity, wide band sound absorption B and maximum sound absorption frequency f.Acoustic absorptivity is an absorbed power and the ratio of incident power, and wide band sound absorption also is sound absorption half-band width relatively, promptly near maximum sound absorption frequency (being resonant frequency sometimes), and the absorb sound ratio of frequency of the difference that acoustic absorptivity equals two half the frequencies of maximum acoustic absorptivity and maximum.Obviously, maximum acoustic absorptivity is the bigger the better, and wide band sound absorption is wide more good more.Factors such as punching rate, cavity depth, aperture, thickness of slab all have certain influence to the acoustic absorptivity and the sound sucting band of microperforated panel soundabsorbing construction.
In the present embodiment, as shown in Figure 2, air outlet 1 part adopts working of plastics usually; Micropore is beaten in inboard going out aerofoil 2, and the diameter of micropore is 1mm～2mm, and the diameter of micropore is more little in theory; Maximum to acoustic absorptivity has influence clearly, and acoustic absorptivity will be big more, can also widen frequency bandwidth simultaneously; Its acoustically effective is relative also good more, but difficulty of processing is also big more, and processing cost also rises thereupon; If micro-pore diameter is excessive, then acoustic absorptivity reduces, and causes noise reduction not obvious.The porosity ranges of micropore is 3%～5%, under certain condition, increases punching rate resonant frequency is increased, and maximum acoustic absorptivity is also slightly increased;
The arrangement of micropore can be square, sees Fig. 3; Also can be equilateral triangle, see Fig. 4.
Arrange for foursquare micropore, its porosity formula is:
Micropore for equilateral triangle is arranged, and its porosity formula is:
Micropore orifice plate rear cavity leave certain thickness (5～20cm) air layer, cavity depth has the greatest impact to resonant frequency behind the orifice plate, cavity depth is big more; Resonant frequency is low more; Good with other parameter combinations of orifice plate can also make maximum coffer slightly increase, and wide band sound absorption increases to some extent.
In a word, factors such as punching rate, cavity depth, aperture, thickness of slab all have certain influence to the acoustic absorptivity and the sound sucting band of microperforated panel soundabsorbing construction.Punching rate preferably should not surpass 5%; Under the situation that condition is allowed, cavity depth is big as far as possible; The aperture is then as far as possible little of well; Select thicker plate also can improve acoustic absorptivity.These parameters of choice will consider that various factors comprehensively determines according to actual conditions.
In order to improve acoustically effective, can be provided with absorbent treatment 4 in a side outwardly of cavity 3, see Fig. 6 and Fig. 8; Promptly on the microcellular structure basis in Fig. 2; Filling sucting sound material in the orifice plate cavity has not only improved acoustic absorptivity, also has function of heat insulation; Prevent air-conditioning when refrigeration, air outlet 1 has condensed water.
With cabinet-type air conditioner experiment in certain air conditioner chamber is example; The semianechoic room of placing indoor cabinet-type air conditioner the band operating mode carries out the noise contrast test; Indoor cabinet-type air conditioner is set to powerful air-supply shelves, and two centrifugal wind wheel rotating speeds are 700rpm, adopts B&K vibrating noise testing equipment that it is gathered and analyzes.
Before adopting technical scheme provided by the invention; The A weighted sound pressure level value of cabinet-type air conditioner is 50.8dBA in the air conditioner chamber; And after adopting technical scheme provided by the invention; The A weighted sound pressure level value of cabinet-type air conditioner is 46.8dBA in the air conditioner chamber, has reduced about 4dBA, so can reduce the noise of cabinet-type air conditioner in the air conditioner chamber effectively behind the present technique scheme implementation.
Second embodiment
Referring to Fig. 9-Figure 12, in the present embodiment, go out aerofoil 2 and be provided with micro chink 2.2.The porosity of micro chink 2.2 is 3%～5%.The width of micro chink 2.2 is 1mm～2mm.
Micro chink can horizontally set, vertically be provided with, oblique setting or arranged in a crossed manner, but considers ease of processing, generally makes consistent with its drawing die direction.Compare with first embodiment, the acoustically effective of present embodiment is a little bit poorer, about 0.3dBA, but it is relatively simple to open the manufacturing process of micro chink on orifice plate, is convenient at engineering construction.
All the other are not stated part and see first embodiment, repeat no more.
Claims (8)
1. control device that reduces cabinet-type air conditioner noise in the air conditioner chamber; Comprise the air outlet (1) that is arranged on the indoor cabinet-type air conditioner and go out aerofoil (2) with air outlet (1) joins; See indoor cabinet-type air conditioner through going out aerofoil (2) back from air outlet (1) through the air-flow after the pressurization, it is characterized in that aerofoil (2) is provided with micropore (2.1) and/or micro chink (2.2).
2. the control device that reduces cabinet-type air conditioner noise in the air conditioner chamber according to claim 1 is characterized in that the porosity of said micropore (2.1) and/or micro chink (2.2) is 3%～5%.
3. the control device that reduces cabinet-type air conditioner noise in the air conditioner chamber according to claim 1 is characterized in that said micropore (2.1) is square or equilateral triangle is arranged.
4. the control device that reduces cabinet-type air conditioner noise in the air conditioner chamber according to claim 1, the diameter that it is characterized in that said micropore (2.1) is 1mm～2mm; And/or the width of micro chink (2.2) is 1mm～2mm.
5. the control device that reduces cabinet-type air conditioner noise in the air conditioner chamber according to claim 1 is characterized in that said micro chink (2.2) horizontally set, vertically setting, oblique setting or arranged in a crossed manner.
6. according to the control device of cabinet-type air conditioner noise in the arbitrary described reduction of claim 1 to 5 air conditioner chamber, it is characterized in that the said back that goes out aerofoil (2) is provided with cavity (3).
7. the control device that reduces cabinet-type air conditioner noise in the air conditioner chamber according to claim 6, the thickness that it is characterized in that said cavity (3) is 5～20cm.
8. the control device that reduces cabinet-type air conditioner noise in the air conditioner chamber according to claim 7 is characterized in that a side outwardly of said cavity (3) is provided with absorbent treatment (4).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101384442A CN102721164A (en) | 2012-05-04 | 2012-05-04 | Control device for reducing noise of indoor cabinet of air conditioner |
| CN 201320214783 CN203274204U (en) | 2012-05-04 | 2013-04-24 | Noise reduction structure of air conditioner indoor cabinet, air conditioner indoor cabinet and air conditioner |
| CN201310146262.4A CN103383140B (en) | 2012-05-04 | 2013-04-24 | Indoor air conditioner cabinet denoising structure, indoor air conditioner cabinet and air-conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101384442A CN102721164A (en) | 2012-05-04 | 2012-05-04 | Control device for reducing noise of indoor cabinet of air conditioner |
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| CN2012101384442A Pending CN102721164A (en) | 2012-05-04 | 2012-05-04 | Control device for reducing noise of indoor cabinet of air conditioner |
| CN 201320214783 Withdrawn - After Issue CN203274204U (en) | 2012-05-04 | 2013-04-24 | Noise reduction structure of air conditioner indoor cabinet, air conditioner indoor cabinet and air conditioner |
| CN201310146262.4A Active CN103383140B (en) | 2012-05-04 | 2013-04-24 | Indoor air conditioner cabinet denoising structure, indoor air conditioner cabinet and air-conditioner |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320214783 Withdrawn - After Issue CN203274204U (en) | 2012-05-04 | 2013-04-24 | Noise reduction structure of air conditioner indoor cabinet, air conditioner indoor cabinet and air conditioner |
| CN201310146262.4A Active CN103383140B (en) | 2012-05-04 | 2013-04-24 | Indoor air conditioner cabinet denoising structure, indoor air conditioner cabinet and air-conditioner |
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| CN102721164A (en) * | 2012-05-04 | 2012-10-10 | 美的集团有限公司 | Control device for reducing noise of indoor cabinet of air conditioner |
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- 2012-05-04 CN CN2012101384442A patent/CN102721164A/en active Pending
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- 2013-04-24 CN CN 201320214783 patent/CN203274204U/en not_active Withdrawn - After Issue
- 2013-04-24 CN CN201310146262.4A patent/CN103383140B/en active Active
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| CN105444387B (en) * | 2015-12-29 | 2018-06-19 | 美的集团武汉制冷设备有限公司 | Outlet air adjustable plate and air conditioner indoor unit |
| CN105444386B (en) * | 2015-12-29 | 2018-07-03 | 美的集团武汉制冷设备有限公司 | The production method of outlet air adjustable plate, air conditioner indoor unit and outlet air adjustable plate |
| CN107869781A (en) * | 2016-09-22 | 2018-04-03 | 三星电子株式会社 | Air-conditioning |
| CN107869781B (en) * | 2016-09-22 | 2021-09-10 | 三星电子株式会社 | Air conditioner |
| CN106403221A (en) * | 2016-11-22 | 2017-02-15 | 广东美的暖通设备有限公司 | Perforating air guide ring, outdoor unit of air conditioner and air conditioner |
| CN107687700A (en) * | 2017-09-18 | 2018-02-13 | 珠海格力电器股份有限公司 | Air outlet panel structure and air conditioner with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103383140B (en) | 2016-04-06 |
| CN103383140A (en) | 2013-11-06 |
| CN203274204U (en) | 2013-11-06 |
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Application publication date: 20121010 |