What if the central air conditioner is noisy? Noise control method of central air conditioning

Central air conditioning is widely used in life. Central air conditioning can be used in hotels and residential rooms. Central air conditioning is also a kind of equipment prone to noise pollution. So, what if the central air conditioner is noisy? This requires noise control so that residents will not be polluted by their noise. There are many reasons for the noise of central air conditioning, but no matter what kind of noise, it can affect the life of residents. Some central air-conditioning noise problems may be solved downstairs. Some noise pollution problems must be solved by professional sound insulation personnel. In particular, the central air conditioning in commercial buildings such as hotels makes more noise, which can be transmitted to other rooms through air conditioning pipes. This kind of noise problem of central air conditioning can not be solved by looking for someone at will. Hangzhou Hanks sound insulation has focused on the field of sound insulation for 20 years, and has done a lot of work in the central air conditioning sound insulation and noise reduction project. Let's take a look at the noise control methods of central air conditioning

The noise of central air conditioning is large, and the noise control of central air conditioning

1、 Introduction to central air conditioning

Central air conditioning is usually composed of an internal unit and multiple extensions, which can be used in the homes of residents with more rooms (such as villas) or in commercial buildings. In particular, the central air conditioning in commercial buildings such as hotels has greater power. When it emits noise pollution, it has a wider impact. Therefore, in many commercial buildings such as hotels, shopping malls and supermarkets, when the central air conditioning system emits noise pollution, they will find noise control methods at the first time. Hangzhou Hanks sound insulation has done many such cases.

2、 Noise analysis of central air conditioner

The central air conditioner is composed of a host (also known as the central air conditioning system) and an extension. The central air conditioning system is placed separately in the equipment room, and the extension is installed in each room. To solve the problem of high noise of central air conditioning, we need to know where the noise of air conditioning is emitted, as follows:

One is the place of ventilation, that is, the exhaust outlet and air supply outlet, which emit aerodynamic noise, which is caused by fan equipment, including exhaust fan, air supply fan and air conditioning duct.

The other is the equipment of the central air conditioning system, including fans, cooling towers, refrigeration units, circulating water pumps, etc., as well as fan coils and air handling units in each room, which will also make noise.

The noise of central air conditioning is large, and the noise control of central air conditioning

3、 Noise control method of central air conditioning

1. Room noise control

Fresh air fan equipment and fan coil units are usually installed in public places and rooms, close to the crowd, and the noise pollution is particularly obvious. Generally speaking, the fresh air fan equipment and fan coil unit with good quality and low noise shall be selected during installation. In the later stage, the noise of these equipment can be treated to reduce its noise.

2. Air flow noise control

There are two places of noise caused by air flow, namely air outlet and air duct. The specific noise control methods are as follows:

For the noise emitted by the air outlet and air inlet, generally install a muffler here to reduce its noise. If the air outlet is located in the room and close to the residential area, consider using silencing methods such as silencing shutters.

For the noise of the air duct, optimizing and adjusting the wind speed of the fan can make some air ducts no longer emit noise. In addition, optimize the air duct to avoid the occurrence of bends and three interfaces as far as possible. If it cannot be avoided, wrap it with sound insulation, so that the noise is difficult to emit. The noise of air-conditioning duct can be transmitted through connected objects, including support hanger and through wall position. Replace the support hanger with elastic, and fill the through wall position with sound insulation materials to avoid the transmission of pipe vibration through the wall.

3. Noise control of central air conditioning equipment

The central air conditioning system contains many high-noise equipment, including fan unit, refrigeration unit, water pump, cooling tower and other equipment. The noise of these equipment shall be tested. If there is noise pollution, carry out noise control. Fan noise control, cooling tower noise control and other equipment noise control are relatively complex, which will not be described in detail here.