For large-scale, converged and used together or for noise control and vibration control, the converged purification air conditioning system should be used. Instead, a decentralized air conditioning system can be used. Large scale purification workshop can also use fresh air treatment and decentralized purification air conditioning equipment.
When the fresh air volume of clean room, positive air volume and exhaust volume is required, the air conditioning system should make full use of the return air. Only when a lot of harmful substances occur in the process of processing can the DC air conditioning system be used. Some processing cannot guarantee the hygiene requirements or damage other processes. The clean room should be equipped with a clean air conditioning system under the following conditions:
Laminar and turbulent cleanrooms
Different cleanrooms with end filters
Clean room and general air conditioning room
Clean room in operation shift or operation room
When the area of the clean room is too large or the room is too large, it shall be divided into several clean air conditioning systems, which are convenient for adjustment, arrangement of return air pipes, air volume and pressure
The production process requires that the air conditioning system cannot be used together.
It is not generally recommended to install silencers for air conditioning systems. Other induction methods should be adopted to satisfy the noise reduction requirements of the clean room. When it is necessary to use silencers, silencers made of structures that do not generate dust and are not easy to accumulate and sound-absorbing materials shall be used.
The following points shall be considered when installing partial exhaust system in clean room:
The exhaust system should not pass through two clean air conditioning systems
Some exhaust systems should adopt measures to avoid air return. The intermediate drain filter or check valve can be installed on the exhaust system.
Some exhaust systems shall adopt noise reduction measures. When the muffler is set, it shall be placed on the suction part of the electric fan.
Attention should be paid to the discharge of harmful substances to make them conform to the national emission regulations. The blowers, return fans and exhaust fans in the air conditioning system shall be interlocked. The interlocking sequence is as follows: when the system is open: first open the blower, then drive the fan and exhaust fan back: when the system is closed: first close the exhaust fan and return the fan, then close the blower.