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Technical parameters of clean room

Aug 11, 2020

Clean room parameters are a more complicated issue. With the advancement of technology, more and more industries apply clean rooms. Clean rooms in different industries have different parameters, so there are more and more technical parameters. The microelectronics industry has higher requirements for the concentration of air-floating particles; the pharmaceutical industry has higher requirements for the concentration of air-floating bacteria; the precision measurement and precision processing industries have higher requirements for temperature and vibration. In view of the above situation, the technical parameters of the clean room can be divided into two categories: basic parameters and special parameters.

Second, the basic parameters of the clean room

1. Cleanliness

  Cleanliness is the most important and basic technical indicator of a clean room, and its unit is: the number of particles with a particle size not less than a certain scale per unit volume of air. The microelectronics industry has the highest requirements for cleanliness, by the optoelectronics industry.

  2. Microbial concentration

  Microbial concentration is another important technical indicator of a clean room. Its unit is: the number of microorganisms per unit volume of air. The bioengineering industry has the highest requirements for microbial concentration, by the medical, pharmaceutical, food, beverage, and cosmetic industries. There are many types of microorganisms, including viruses, bacteria, fungi, algae, spores, pollen, and mites. Microorganisms in the air are part of the airborne particles, to be precise the more harmful part. Usually the concentration of bacteria in the air is measured.

  3 .temperature

  Temperature is the basic working condition. Almost all clean rooms have clear requirements for temperature. Temperature will affect the scale of the object, thereby affecting the accuracy of processing, so precision processing has quite strict requirements on temperature. Temperature will affect the parameters of the instrument, resulting in measurement errors, so precision measuring instruments have higher requirements for temperature.

  4. Humidity

  Humidity is also a basic working condition. Almost all clean rooms have clear requirements for humidity. Excessive humidity will cause chemical reactions of many substances, which will affect the quality of products, and even cause equipment failure and product scrap. If the humidity is too low, many substances will be dehydrated and deformed and lose their original functions.

  5. Wind speed and volume

  Adequate wind speed and air volume are the guarantee of cleanliness. Excessive wind speed and air volume not only waste energy, but sometimes affect normal work.

  6. Air pressure and pressure difference

  Normal air pressure is the basic condition for normal work. The necessary pressure difference is to control the leaky stomach. In order to ensure cleanliness, clean rooms in the microelectronics industry do not allow air with low cleanliness to leak to areas with high cleanliness. Virus laboratories or infection wards do not allow indoor air to leak outside.

  7. Noise

  Excessive voice will not only affect normal work, but also affect the health of personnel. Noise reduction is a basic requirement of clean rooms.

  8. Illuminance

Proper illumination is a necessary condition for normal work.

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