The influence of ventilation in clean room on the whole project can not be underestimated. For example, air conditioning and ventilation equipment in clean room can not only send enough clean air into the room, but also discharge air that does not meet the clean requirements to meet the requirements of purification and production process. It can be seen that air conditioning and ventilation equipment plays an important role in the whole clean room. Next, Runde Clean Room Company will introduce air conditioning and ventilation equipment commonly used in clean rooms.
Clean Room
Air conditioning and ventilation equipment in clean room can be divided into comprehensive ventilation and local ventilation according to the different ventilation range. The difference between the two ventilation modes:
Full ventilation: ventilate the whole space.
Local ventilation: The polluted air is collected and discharged outdoors directly at the place where the pollutants are produced, or fresh air is supplied directly to the local space. Local ventilation has the advantages of good ventilation effect and saving air volume.
The energy required for air flow in a mechanical ventilation system is supplied by the fan. There are two kinds of fan commonly used in clean room: centrifugal fan and axial fan.
Axial-flow fan is mainly used in ventilation system with small resistance because of its lower wind pressure and higher noise than centrifugal fan under the same impeller diameter and rotating speed. It has the advantages of small volume, simple installation and can be installed directly on the wall or pipeline.
Centrifugal fan has high pressure head and low noise. The back-bend fan with wing blade is a low noise and high efficiency fan.
The air conditioning and ventilation equipment in the clean room may have excessive noise in actual use, so how can we avoid this problem?
(1) Reasonable selection of air conditioning and ventilation equipment. Low noise air conditioning and ventilation equipment should be selected in the occasion of high noise control requirements. The noise of centrifugal air conditioning and ventilation equipment with different types of air conditioning and ventilation equipment is less than that of centrifugal air conditioning and ventilation equipment with forward blade under the agreed air volume, air pressure and airfoil blade.
(2) The working point of air conditioning and ventilation equipment should be close to the maximum efficiency point. The higher the efficiency of the same type of air conditioning ventilation equipment, the smaller the noise. In order to keep the operating point of air-conditioning and ventilation equipment in the high efficiency area of air-conditioning and ventilation equipment, the valve should be avoided as far as possible. If it is necessary to install valves at the extrusion end of air-conditioning and ventilation equipment, the optimum position is 1 m away from the outlet of air-conditioning and ventilation equipment. It can reduce the noise below 2000 Hz. The air flow should be uniform at the entrance of air conditioning ventilation equipment.
(3) Reduce the rotational speed of air conditioning and ventilation equipment properly under possible conditions. Rotating noise of air conditioning and ventilation equipment is proportional to 10 power of impeller circumferential velocity, and eddy current noise is proportional to 6 power (or 5 power) of impeller circumferential velocity. So reducing the speed can reduce the noise.
(4) When designing ventilation system in clean room, the pressure loss of the system should be minimized. When the total volume and pressure loss of the ventilation system are large, it can be divided into small systems.
(5) The flow rate of air in the pipeline of clean room should not be too high in order to avoid causing regenerative noise. The flow rate in the pipeline should be determined according to different requirements and relevant regulations.
The professional technicians of Ed Purification Engineering design a reasonable plan to adapt to the production process and the cost of the project. The design technical indicators meet the national standard of clean room. The experienced construction team of the purification project is fast and efficient, and the after-sales service is perfect. To learn more about the medical purification industry, please pay attention to the Wechat Public No. Aide-188 (Ed Purification and Oxygen Supply)