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What are the basic characteristics of dust-free purification air conditioning systems?


What are the basic characteristics of dust-free purification air conditioning systems?
I. Classification of Dust-free Purification Air Conditioning System Purification air conditioning systems for clean rooms should be determined according to the technological requirements of the products they produce. Generally, they should not be classified by area or simply by the level of air cleanliness.
1. The division of dust-free purification air-conditioning system should take care of the layout of the supply, return air and exhaust ducts, try to make the layout reasonable, easy to use, and strive to reduce the overlap of various duct pipes, if necessary, the individual rooms in the system can be Configure temperature and humidity adjustment devices as required.
2. Purification and air-conditioning systems with different operating schedules, different operating rules or different usage times should be set separately.
3. For general air-conditioning systems, the two-stage filtered air supply system and the purification air-conditioning system must be set up separately.
4. Systems with large differences in temperature or humidity control requirements or accuracy requirements should be set separately.
5. One-way flow system and non-one-way flow system should be set separately.
6. Toxic, harmful, flammable and explosive substances or gases emitted from a certain process or a certain room in the production process of a product will have a harmful effect on other processes or rooms, endanger the health of personnel, or cause cross-contamination. Separate purification air-conditioning systems .
Second, the characteristics of dust-free purification air conditioning system Compared with general air conditioning systems, clean room air conditioning systems have the following characteristics.
1. In order to ensure that the clean room is not polluted by outdoor or adjacent rooms, the clean room and the outdoor or adjacent rooms must maintain a certain pressure difference (positive or negative pressure), and the minimum pressure difference is above 5Pa, which requires a certain positive Compressed air volume or a certain amount of exhaust air.
2. In addition to heat and wet treatment, the air treatment process of the clean air-conditioning system must be pre-filtered, intermediate-filtered, and end-filtered. Some high-level clean rooms are designed to effectively and energy-saving The air is treated with centralized fresh air treatment. Only the fresh air treatment system is provided with multi-stage filtration. When there is a strict requirement to remove molecular pollutants, various types of chemical filtration should also be set up.
3. In addition to the indoor temperature and humidity of the general air-conditioning system, the parameters controlled by the purification air-conditioning system must also control the parameters such as the cleanliness and pressure of the room. The temperature and humidity control accuracy is high. Some clean rooms require temperature control. Wait within plus or minus 0.1 degrees Celsius.
4. After installation of the dust-free purification air-conditioning system, commissioning and comprehensive performance testing shall be performed in accordance with regulations to achieve the required air cleanliness level. Leak detection shall be performed on the high-efficiency filter and its installation capacity in the system according to regulations.
5. The air volume of the dust-free purification air-conditioning system is large (the number of air changes is generally 10 to hundreds), the corresponding energy consumption is large, and the system cost is also high.
6. In the clean room air distribution and air flow organization, it is necessary to limit and reduce the diffusion of dust particles, reduce the secondary air flow and vortex, so that the clean air is not polluted and sent directly to the work area at the shortest distance.
7. The air treatment equipment of the dust-free purification air-conditioning system, the duct material and sealing material have certain requirements according to the different levels of air cleanliness. After the duct is manufactured and installed, it must be cleaned, wiped and sealed according to regulations. .
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