How to reduce noise of air conditioning unit on the roof of hotel?

Central air conditioning units are mostly installed on the roofs of large buildings, such as hotels, shopping malls, shopping centers and other urban complexes. Affected by the structure and installation environment of the unit, the noise pollution of the equipment is wide, so the noise reduction of the central air conditioning unit has attracted much attention. In engineering, noise control of air conditioning units focuses on noise elimination, sound insulation and vibration reduction, so how to reduce the noise of central air conditioning units?

Noise source of central air conditioning unit

The central air conditioning unit is mainly composed of fan noise, equipment vibration noise and water flow sound in some pump pipes. The noise spectrum is concentrated in the middle and low frequency bands, showing a continuous buzz. Long-term exposure to this noise is likely to cause irritability, dizziness and tinnitus and other adverse reactions.

Noise reduction measures of central air conditioning unit

1. Noise elimination, muffler controls the air-conditioning unit to reach the sound receiving point through the ventilation duct and the airflow noise in the air duct. At the same time, it is used for air inlet and air outlet of air conditioning room, boiler room, refrigeration room and other equipment rooms.

2. Vibration reduction, eliminating the rigid connection between vibration source equipment and sound transmission medium. To control the noise of air conditioning system equipment, it is necessary to control the solid sound transmitted by the vibration of air conditioning units and refrigeration equipment, and at the same time avoid the forced vibration of ventilation pipes. Common methods include installing shock absorbers, adding vibration isolation hoses, and winding pipes to reduce vibration and damping.

3. Sound insulation. Refrigeration host, chilled water pump, cooling water pump and other noisy ones are basically set in the basement. In order to reduce the influence of equipment noise on the rooms used on the ground, the walls and floors of the computer room can be soundproofed. In addition, the exterior of the roof outdoor equipment can be closed with a sound barrier to reduce the noise impact.

The above is just a brief description. The general noise reduction measures of central air conditioning units, as well as the material, size and frequency parameters of specific noise reduction equipment, need to be analyzed and designed according to the on-site noise spectrum. If you have any questions, please call Sanxian Audio.