Air conditioning vibration and noise reduction of civil buildings

　　With the development of modern science and technology and the improvement of people's living standard, the use of air conditioning system in civil building in our country is more and more widely. The application of air conditioning system, improve the air conditioning room in the small climate, to bring people more comfortable temperature, humidity environment. Air conditioning system in civil building to people's life, work, leisure and other activities to bring comfort at the same time, it also brings the problem can not be ignored. And, with the people's awareness of health, environment and other issues continue to improve, The noise generated by the air conditioning system will be more and more valued by people.

Kacise  in the airconditioning system of civil construction,  systematically and comprehensively analyses the noise source air conditioning system exists, and the sound mechanism of air conditioning equipment is analyzed. The noise control measures used in civil building air conditioning systems are: noise elimination, sound absorption, sound insulation and vibration isolation. Different noise control measures should be taken for different equipment, which is usually used in order to achieve a better control of noise.

Overview of vibration isolation device

(1) metal spring isolator has the following advantages: Vibration isolation of low frequency， Better than other vibration isolation device; long service life, and can resist the corrosion of oil and water, and is not affected by the temperature; the stability of mechanical properties, The design calculation method is mature; processing for the production,Easy processing and production，Small changes in characteristics;Low price。The disadvantage is that: the damping ratio is small, the resonance amplification factor is large, easy to transfer high frequency vibration, the stability of the horizontal direction is poor.

（2）Rubber vibration isolator: in particular, the pump and the high speed of the fan and other equipment, due to higher frequency of disturbance, the use of more.he rubber vibration isolator has two kinds of rubber shear Compression vibration isolator and vertical compression vibration isolator.Because of the large static compressive capacity, the vibration frequency of the rubber shear compression vibration isolator is very low, and it has a very good vibration isolation effect.It is easily affected by temperature, oil, ammonia and Freon erosion; and the deformation will continue under long load, with the increase of service life, effect will gradually weaken, to be replaced regularly.

（3）Several other isolation materials: cork, glass fiber board, Felt, Asphalt mineral wool felt,Rock wool.