Clean room air purification system
Clean room air purification system
The cleanliness of the production environment is mainly achieved by heating ventilation and air conditioning (HVAC). The main components of HVAC include return fans, heating and cooling coils, multi-stage filters, humidifiers and dehumidifiers, and air distribution pipes And control instruments to adjust the performance of each component; according to production...
Text label: clean room design and decoration, clean room installation, clean room air purification
Clean room air purification system
The cleanliness of the production environment is mainly achieved by heating ventilation and air conditioning (HVAC). The main components of HVAC include return fans, heating and cooling coils, multi-stage filters, humidifiers and dehumidifiers, and air distribution pipes And control instruments to adjust the performance of each component; set up clean rooms of corresponding levels according to the product and production process, whether the system components meet the requirements of the clean room, whether the design specifications are suitable for the size; whether the air organization form and the number of air changes are reasonable; the studio Whether the temperature and humidity meet the regulations, and how to control it; whether the people and objects entering the clean room have been purified and buffered accordingly; Close to the corner, the air supply and return air vents should not be blocked by equipment and facilities, and clean air should sweep the entire area of u200bu200bthe studio as much as possible.
The air duct joints are stepped or tongue-and-groove. When connecting air ducts, flanges, air outlets, laminar flow hoods, suspended ceilings and other equipment and components, the flanges and frame edges must be flat and close to each other, and the width should not be less than 7mm; the thickness of the gasket is 4-6mm, the compression rate is 25%-30%, and the inner side of the gasket is flush with the inner wall of the air duct; There are holes for particle and wind pressure measurement, and the holes must be sealed after installation; in addition to cleaning and checking for defects, specifications, and leakage of high-efficiency filters before installation, the clean room air-conditioning system also needs to be tested and cleaned again. For more than 12H, it can be installed after re-cleaning; the gap between the high-efficiency filter and the frame is not more than 1mm, and the sealing can be done with gaskets, negative pressure and liquid tank sealing. Operation, the installation of monitoring instruments should be easy to observe and calibrate, the floor of the installation site should be flat and clean, the installed equipment should have vertical axis and horizontal axis, and all parts in the system that come into contact with clean air should be flat, smooth and easy to clean. , All joints and holes must be coated with sealant to prevent leakage; all installation and processing should avoid damage to the coating, the damaged parts should be re-galvanized, and the installation should be completed. The fan should be tested for more than 2H. Equipment, installation should ensure that the interlock is in normal condition. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, renovation and other supporting services for clean rooms and clean rooms.
The operation confirmation content of clean room HVAC system: air conditioning equipment test, high efficiency filter test, temperature and humidity test, smoke test and suspended particle and microorganism measurement, etc. The installation and sealing of high-efficiency filters is the key to air purification. Many clean rooms are unsuccessful because the sealing is not up to standard, resulting in leakage and bacteria. The usual sealing methods include: negative pressure sealing, mechanical compression and liquid tank sealing; filter system The leak detection test is the basis of particle measurement, and its importance is no less than that of particle measurement. The leak detection methods mainly include aerosol photometer method and particle counter method. The scope of leak detection of the filter system includes: the filter media of the filter, the connection between the filter media and its frame, between the gasket of the filter frame and the filter support frame, between the support frame and the wall or ceiling, the newly installed filter Or the replaced filter must be checked for leaks. Under normal circumstances, the filter system needs to be checked for leaks once a year. Air volume and air pressure are very important to maintain the integrity of a clean environment. Appropriate air pressure can make the clean room quickly self-clean, control pollution and adjust temperature and humidity; the air volume test content includes: total air supply volume measurement, fresh air volume, 1 The secondary/secondary return air volume, exhaust air volume, and the air volume in each dry and branch air duct and the air volume at the air outlet, etc. Through the wind pressure test, it can be confirmed whether the positive or negative pressure is maintained between the clean room and the adjacent room, and the flow direction of the air can be judged. According to the requirements of GMP, the static pressure difference between adjacent rooms with different air cleanliness levels is greater than 5Pa. The outdoor static pressure difference is greater than 10Pa.
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