Analysis on the noise of air-cooled chillers

Analysis on the noise of air-cooled chillers

When many users use air-cooled chillers, they usually have no noise problems because they have gone through a comprehensive test at the beginning. However, with long-term use and the user’s failure to maintain it carefully, the air-cooled chiller begins to produce louder noise, which will have a great impact on the surrounding environment, and even the ground has a strong sense of vibration. Normal work. Then it needs to be dealt with in time at this time, otherwise it will have a serious negative impact on the equipment and the staff. Next, we will analyze the noise problem of air-cooled chillers.

　　 Let’s first understand which parts make the air-cooled chiller produce noise. Usually the main sources of these noises are from compressors, circulating water pumps and cooling fans. Since the operation of such equipment will produce noise, the change in noise level mainly depends on the above types of equipment. In the case of increasing noise, users are required to conduct a comprehensive inspection of various internal accessories to ensure the root cause of the increase in noise, so as to quickly and effectively deal with it.

Air-cooled chillers usually adopt the following methods to prevent noise: units, cooling water pumps, chilled water pumps, and system pipes for vibration isolation treatment; chillers are placed in the computer room or factory production workshop for sound absorption and sound insulation treatment. In a place with unobstructed ventilation, avoid discharge backflow.

　　 If the air-cooled chiller has mechanical operating noise, the range and magnitude of the noise can be reduced by lubrication. If it is caused by the failure of the internal parts, you can repair the parts in time or replace the new internal parts to obtain the maintenance effect of reducing noise.

　　 If it is the noise from the water pump, the great reason is that the water quality is problematic, and the user needs to configure a water quality treatment system according to the requirements of the air-cooled chiller. Only by ensuring that the water quality meets the minimum standards of air-cooled chillers can the safe operation of the water pump be guaranteed, so as to avoid serious noise caused by the overload operation of the water pump.

　　The noise of the axial fan of the air-cooled chiller is different due to different wings and different speeds. The noise of the 8-pole motor is lower than that of the 6-pole motor. The design should be selected flexibly according to surrounding conditions and noise requirements, and strive to be economical and reasonable. In order to reduce noise and vibration, the air-cooled unit and water pump are used as the basis for vibration reduction. The inlet and outlet of the chiller and cold water pump are equipped with soft joints, and the air-cooled chiller is surrounded by muffler walls.

　　The method of judging the noise source of air-cooled chillers is relatively simple, mainly because the equipment structure is relatively simple and compact. When the equipment has noise, it can be simply distinguished and judged according to the type of noise. After finding the source of noise, it needs to be dealt with in a timely and effective manner, so as to improve the efficiency of the air-cooled chiller and avoid the influence of noise, which may cause various failures of the air-cooled chiller.