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中央空调噪声控制方法
空调系统噪声控制涉及消声、隔声、吸声以及隔振等内容。空调噪声的传播方式包括空气传声与固体传声。固体声传播主要包括制冷机组、冷却塔、空调器、风机盘管、管道等设备振动的传播,空气声传播包括风管的噪声传播与末端噪声直接辐射等。

Noise control of air conditioning system involves the content of silencing, noise, absorption and vibration isolation. Air conditioning noise is transmitted by air and solids. Solid sound propagation mainly includes refrigeration unit, cooling towers, air conditioner, fan coil, the spread of pipeline equipment such as vibration, noise transmission of sound propagation including air duct and the end of the direct radiation noise and so on. 

1、选择合适的低噪声设备从声源上控制噪声:

Choose the right low-noise equipment to control the noise from the sound source: 

①采用合理的空调形式来降低噪声;

Adopt reasonable air conditioning to reduce noise. 

②减少风声及水流声,冷冻水流速控制在1.5m/s左右,支管风速应≤3.5m/s,主风管风速应≤4m/s,采用合适的风速及冷冻水流速;

(2) reduce the wind and the water running, chilled water flow rate control at about 1.5 m/s, branch pipe wind speed should be 3.5 m/s or less, the main duct wind speed should be 4 m/s or less, use appropriate wind speed and chilled water flow; 

③选用质量先进的低噪声设备,对于制冷主机应选择振动相对较小压缩机,对于水泵应尽量选择≤450rpm转速的低转速泵,新风机设备、风机盘管设于公共场区或办公区、休息区内,因此必须选用质量好、噪声低的产品,其噪声可直接传到人群中。

Choose low noise equipment, advanced quality for refrigeration host should choose relatively small compressor vibration, the pump should choose as far as possible or less 450 RPM speed of the low speed pump, new fan equipment, fan coil units in public area and office area, rest area, so you must choose the product, good quality, low noise, the noise can be directly to the crowd. 
2、空调系统消声

The air-conditioning system silenced 

消声器是一种具有吸声内衬或特殊结构形式能有效降低噪声的气流管道,它既可以有效地降低噪声,又可以使气流顺利通过,通常需要在通风管道内安装消声器来降低噪声声压级。主要是为了控制空调机组等空调设备的噪声通过通风管道传到空调服务区及风道内气流噪声,在噪声控制技术中,消声器是应用最多最广泛的降噪设备,空调系统送回风管道的消声,以及冷却塔进出风口的消声等,它被应用于空调机房、锅炉房、冷冻机房等设备机房进出风口的消声。

Muffler is a acoustic liner or special structure can effectively reduce the noise of the air pipeline, it can effectively reduce the noise, and can make the air flow smoothly through, usually need to be installed in the ventilation duct muffler to reduce noise sound pressure level. Mainly in order to control the noise of the air conditioning unit, air conditioning equipment through the ventilation pipe to the air conditioning service area and inside the air duct, air flow noise in the noise control technology, muffler noise equipment is the most widely used, muffler, air conditioning system back to the wind pipe and cooling tower into the outlet of the noise, it is used in air conditioning room, boiler room, equipment room into the outlet of the cooling room noise elimination. 

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