CN1256389A - Noise reducing system for reducing the airflow noise of indoor air conditioner cabinet - Google Patents
Noise reducing system for reducing the airflow noise of indoor air conditioner cabinet Download PDFInfo
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- CN1256389A CN1256389A CN 99123819 CN99123819A CN1256389A CN 1256389 A CN1256389 A CN 1256389A CN 99123819 CN99123819 CN 99123819 CN 99123819 A CN99123819 A CN 99123819A CN 1256389 A CN1256389 A CN 1256389A
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- noise
- air conditioner
- centrifugal fan
- indoor air
- evaporimeter
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Abstract
The noise reducing system of the present invention consists of one centrifugal pump driven by one motor, one set of fan outlet deflector plates, one evaporator and one set of exhaust port defector plates. It has air channel structure designed according to aerodynamics, so that it has greatly reduced noise and power consumption caused by separation flow and other phenomena while ensuring required draught.
Description
The present invention relates to reduce the noise reduction system of indoor air conditioner cabinet draft noise.Particularly the centrifugal fan biasing is strengthened and reaches the noise reduction system of the reduction draft noise of exhaust outlet positioned inside turning vane in corner above centrifugal fan.
The ventilating system of the existing indoor cabinet-type air conditioner of conventional air-conditioning roughly is divided into two kinds.First kind is centrifugal fan to be installed on the Lower Half of cabinet-type air conditioner, and evaporimeter is installed on the first half.Air communication is crossed the air inlet leaf grating air inlet of cabinet-type air conditioner front.The evaporimeter of blowing over the top after the supercharging of air-flow process centrifugal fan.Through with the heat exchange of evaporimeter, the exhaust outlet of cold airflow through the top enters indoor.As shown in Figure 1.Second kind is centrifugal fan to be installed on the first half of cabinet-type air conditioner, and evaporimeter is installed on Lower Half.Airflow flowing is carried out heat exchange through evaporimeter earlier after the air inlet leaf grating enters cabinet-type air conditioner, discharge from the top exhaust outlet after the supercharging of cold airflow process centrifugal fan then.As shown in Figure 2.
The noise of indoor air conditioner cabinet can be divided into two big classes: a class is the mechanical shock noise, and another kind of is the pneumatic noise that air current flow produces.The mechanical shock noise of indoor apparatus of air conditioner is much smaller than pneumatic noise at present.Pneumatic noise results from the collision of gas micelle.Serious air-flow whirlpool and separated flow cause the collision of gas micelle, cause the increase of pneumatic noise.
Present two kinds of ventilating systems all exist deficiency:
1., do not make full use of the spatial design ventilating duct in the cabinet-type air conditioner, make that the air outlet of centrifugal fan is narrow and small, muzzle velocity is bigger than normal, and causes serious separated flow because the diffusion angle of diffuser is bigger than normal, thereby produces noise and increased energy consumption.
2., exhaust outlet turning energy loss is big.The air-flow of exhaust outlet directly collides the cabinet-type air conditioner upper wall, and caused separated flow brings noise and energy consumption to increase.
3., the air-flow of the first half is through greater than 180 ° the discharge that turns in the centrifugal blower volute, producing noise also increases energy consumption.
In second kind of system, air-flow flows through cabinet air-conditioner through " S " type route, in order to reserve passage to air inlet, the necessary attenuate of the thickness of centrifugal blower, the necessary thus air velocity that increases centrifuge.And turn to discharge after centrifugal fan institute exhaust stream directly collides upper wall without rectification, exhaust noise and first kind of system of energy loss-rate are more unfavorable.This system is owing to be negative gauge pressure state in the rack, the sealing of rack has been increased requirement.If sealing is bad, then can actually reduce the available ventilation amount.
Patent " noise reduction system of air conditioner " (96104619.8) changes preceding air inlet leaf grating into both sides air inlet leaf grating, has been arranged into both direction air-breathing with exhaust on noise source, gives people's the sensation that acoustically causes acoustic noise reducing.In addition, owing to will stay passage to air inlet, the thickness of centrifugal fan is thinned, and just must improve in the spiral case and exit velocity in order to guarantee that flow is constant, and this just must increase noise and energy consumption.Though the method has been installed a lot of sound-absorbing materials again in addition in rack, noise is decreased, the method is not to solve noise and energy consumption problem from the source.
Patent " low-noise centrifugal formula ventilation blower " (92237199), " the passive noise control device of room air conditioner " (93208380), " the centrifugal air channel of air regulator noise reduction " (93213413) are and adorn the noise reduction facility in addition, rather than reduce noise and energy consumption from the source.
The objective of the invention is to construct a kind of noise reduction system that reduces indoor air conditioner cabinet draft noise.The present invention is from aerodynamic angle, the space that makes full use of in the cabinet-type air conditioner re-constructs the ventilating duct structure, reduces the generation of separated flow, slows down the existing existing problem of indoor air conditioner cabinet, guaranteeing to reduce noise significantly under the constant prerequisite of air conditioner ventilation performance, cut down the consumption of energy simultaneously.
The object of the present invention is achieved like this: it is positioned at by motor-driven centrifugal fan (1), one group by one, and the flow deflector (2) of centrifugal fan (1) top, spiral case ventilating duct (3) that surrounds centrifugal fan (1) lower half, one are positioned at the evaporimeter (4) of flow deflector (2) top, one group of turning vane in corner (5) that is positioned at evaporimeter (4) top is formed.As shown in Figure 3.
The installation position of the centrifugal fan in above-mentioned solution (1) is a side that is biased in the rack bottom.
Flow deflector in above-mentioned solution (2) can be made up of multi-disc, and its shape can also can be made by becoming thick plates by the equal thickness plate.
Spiral case ventilating duct (3) in above-mentioned solution is made of Archimedes spiral.
Evaporimeter in above-mentioned solution (4) can be become the structure of multilayer to form by the evaporator series of individual layer.Also can only use the evaporimeter of individual layer.
Turning vane in corner in above-mentioned solution (5) can bend to the concyclic heart arrangement of circular arc by the equal thickness plate and constitute.
In above-mentioned solution, also can guide exhaust simultaneously in the anterior perforate of cabinet-type air conditioner upper wall.Be used to reduce the energy loss of exhaust, further reduce noise.As shown in Figure 4.
The invention has the advantages that:
1. increase the biasing of centrifugal fan (1), strengthen the size of spiral case ventilating duct (3), lower air velocity, reducing noise and energy consumption in the spiral case thus.
2. settle several pieces flow deflectors (2) in centrifugal fan (1) top.The air-flow that comes out " is got rid of " on centrifuge top directly guide evaporimeter (4) into, to reduce unnecessary energy loss.Obviously downward air-flow is introduced spiral case ventilating duct (3), guide evaporimeter (4) into through spiral case ventilating duct (3).
3. turning vane in corner (5) 2-3 sheet is set in the exhaust outlet inboard,, thereby has reduced noise and energy consumption in order to separated flow and the whirlpool in the minimizing exhaust outlet.
4. because the decline of exhaust resistance and energy consumption makes the system of use multilayer evaporimeter (4) become possibility.Use the multilayer evaporimeter can improve heat exchange efficiency, the rectification and the noise reduction of supply and exhaust bring benefit simultaneously.
Fig. 1 is the structural representation of first kind of ventilating system of the indoor cabinet-type air conditioner of conventional air-conditioning;
Fig. 2 is the structural representation of second kind of ventilating system of the indoor cabinet-type air conditioner of conventional air-conditioning;
Fig. 3 is that the present invention is not with the structural representation of top exhaust ventilation system;
Fig. 4 is the structural representation of band of the present invention top exhaust ventilation system.
With reference to accompanying drawing, describe embodiments of the invention in detail.
Shown in Fig. 3,4, present embodiment air conditioner refrigerating power is 14000 watts (600mm (wide) * 310mm (thick) * 1900mm (height)).The high position of 480mm that makes progress, the definition air-conditioning panel left side is coordinate zero point.Being x laterally, vertically is y.
The diameter of centrifugal blower is Φ 380mm in the above-described embodiment.The installation site is: (260,0)
5 thin plate turning vane in corner have been arranged in the centrifugal blower top in the above-described embodiment.
5 flow deflector curvilinear equations from left to right are:
First is that two sections arc sections are formed:
Last circular arc: (x-7628.8)
2+ (y-430)
2=7628.8
2
Following circular arc: (x-39.8)
2+ (y-44.2)
2=30
2
Second is that two sections arc sections are formed:
Last circular arc: (x-1517.4)
2+ (y-430)
2=1450.7
2
Following circular arc: (x-119.7)
2+ (y-175.4)
2=30
2
The 3rd is that two sections arc sections are formed:
Last circular arc: (x-421.5)
2+ (y-430)
2=288.2
2
Following circular arc: (x-265.2)
2+ (y-224.5)
2=30
2
The 4th is that a circular arc adds straight line:
Last circular arc: (x-350.1)
2+ (y-430)
2=150
2
Following straight line: y=-1.192x+309.8
The 5th is that two sections arc sections are formed:
Last circular arc: (x-370)
2+ (y-430)
2=103.2
2
Following circular arc: (x-39.2)
2+ (y-33.9)
2=412.8
2
Definition spiral case institute coordinate system shortly is the axle center of centrifugal fan, and then the curvilinear equation of spiral case is:
r＝195(1+0.22073(θ-2.967))
θ∈[17π/18，37π/18]
The evaporimeter top is provided with 3 of turning vane in corner in the above-described embodiment, curves equidistant concyclic the feeling at ease of circular arc with thin plate and puts, and the centre is aided with skeleton and prevents the flow deflector vibrations.
For settling flow deflector,, the heat exchange evaporimeter is divided into 3 layers of setting in the above-described embodiment, abdicates the space to the flow deflector on it simultaneously also in order to improve heat exchange efficiency to the evaporimeter top.
60 decibels of 50 decibels of being reduced to native system when adopting noise that above noise reduction system makes this large power air-conditioned indoor cabinet-type air conditioner from conventional ventilating system have reduced by 10 decibels.
Claims (6)
1, a kind of noise reduction system that reduces indoor air conditioner cabinet draft noise is characterized in that: be positioned at by a motor-driven centrifugal fan (1), one group that the flow deflector (2) of centrifugal fan top, spiral case ventilating duct (3) that surrounds centrifugal fan (1) lower half, one are positioned at the evaporimeter (4) of flow deflector top, one group of turning vane in corner (5) that is positioned at exhaust outlet inside, evaporimeter top is formed.
2, the noise reduction system of reduction indoor air conditioner cabinet draft noise according to claim 1 is characterized in that: a described side that is biased in the cabinet air-conditioner bottom by motor-driven centrifugal fan (1).
3, the noise reduction system of reduction indoor air conditioner cabinet draft noise according to claim 1, it is characterized in that: the described buckling curve that is positioned at the flow deflector (2) of centrifugal fan (1) top designs according to aerodynamic requirement, flow deflector (2) can be made with the bending of equal thickness plate as required, also can make the flow deflector with aerofoil profile.
4, the noise reduction system of reduction indoor air conditioner cabinet draft noise according to claim 1 is characterized in that: the shape of the spiral case ventilating duct (3) of described encirclement centrifugal fan (1) lower half is made of Archimedes spiral.
5, the noise reduction system of reduction indoor air conditioner cabinet draft noise according to claim 1 is characterized in that: the described evaporimeter (4) that is positioned at the flow deflector top is made up of the evaporimeter of single or multiple lift series connection.
6, the noise reduction system of reduction indoor air conditioner cabinet draft noise according to claim 1 is characterized in that: the described turning vane in corner that is positioned at exhaust outlet inside, evaporimeter top bends to the concyclic heart of circular arc with the equal thickness plate and arranges formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99123819 CN1256389A (en) | 1999-11-15 | 1999-11-15 | Noise reducing system for reducing the airflow noise of indoor air conditioner cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99123819 CN1256389A (en) | 1999-11-15 | 1999-11-15 | Noise reducing system for reducing the airflow noise of indoor air conditioner cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN1256389A true CN1256389A (en) | 2000-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99123819 Pending CN1256389A (en) | 1999-11-15 | 1999-11-15 | Noise reducing system for reducing the airflow noise of indoor air conditioner cabinet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| CN104165161A (en) * | 2014-09-10 | 2014-11-26 | 牛京伟 | Low-noise centrifugal fan special for air purifier and air purifier |
| CN104180444A (en) * | 2014-09-10 | 2014-12-03 | 牛京伟 | Fresh air integrated type air purifier |
| CN110671746A (en) * | 2019-11-04 | 2020-01-10 | 珠海格力电器股份有限公司 | Air duct structure, indoor unit and air conditioner |
-
1999
- 1999-11-15 CN CN 99123819 patent/CN1256389A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| CN103383140B (en) * | 2012-05-04 | 2016-04-06 | 美的集团股份有限公司 | Indoor air conditioner cabinet denoising structure, indoor air conditioner cabinet and air-conditioner |
| CN104165161A (en) * | 2014-09-10 | 2014-11-26 | 牛京伟 | Low-noise centrifugal fan special for air purifier and air purifier |
| CN104180444A (en) * | 2014-09-10 | 2014-12-03 | 牛京伟 | Fresh air integrated type air purifier |
| CN110671746A (en) * | 2019-11-04 | 2020-01-10 | 珠海格力电器股份有限公司 | Air duct structure, indoor unit and air conditioner |
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