Air purification engineering experts said that indoor decoration materials and home pollution are the main aspects of indoor air pollution. Paint, plywood flower board, foam wood shavings, packaging, interior wall coatings, plastic materials formaldehyde, benzene, toluene, chlorine, ethanol and other organic steam carcinogens, in the above; during construction, gradually found different pollution, chemical construction (northern winter building antifreeze gas leak agent). Ammonia water is another kind of underground rock and soil paving floor tile. The floor tile is a colorless radon that forms radioactive substances. The natural radioactive gas in Singapore is harmful to people. The National Environmental Protection Agency (EPA) has 14000 deaths and radon purification air pollution in the United States every year. According to the work, it also brings indoor air pollution to the metabolism of human body and various volatile domestic garbage. When people are in outdoor and indoor activities, a large number of pollutants such as human body, skin and sweat glands are discharged through the respiratory tract. In daily life, the number of rooms caused by air pollution such as cosmetics and pesticides is too much, making people tired and dizzy. The rest of the room can help bacteria, viruses and other microbes thrive. Especially in some primary and secondary schools.
For most clean spaces, in order to prevent the invasion of external pollution, the internal pressure (static pressure) must be kept higher than the external pressure (static pressure).
The maintenance of differential pressure shall generally conform to the following principles:
The pressure of clean space is greater than that of unclean space.
2. The pressure of high clean space is greater than that of low clean space.
3. The door between clean rooms should be open to the highly clean room.
The maintenance of the pressure difference depends on the fresh air volume. In this case, the fresh air volume should compensate for the leakage air flow in the gap. Therefore, the physical meaning of the pressure difference refers to the resistance of the leakage air flow through various gaps in the clean room.
The air velocity discussed here refers to the air velocity in the clean room. When discussing specific equipment, explain the airflow velocity in other clean spaces.