Fan filtration unit by the initial filter inhalation of new air for the first filtration, After a second pass through the high-efficiency filter, the entire air surface to 0.45m / s ± 20% of the wind speed uniformly sent out to the clean shed, so that the clean air air flow is a vertical unidirectional flow, thus ensuring that the cleanliness required in the work area.

• Ventilation system: clean shed is usually equipped with a highly efficient ventilation system to maintain air flow, reduce airborne particles and other pollutants. The ventilation system also removes unclean air and introduces filtered fresh air.
  

• Filters: Ventilation systems in clean rooms include high-efficiency air filters, usually HEPA (High Efficiency Particulate Air) or ULPA (Ultra High Efficiency Particulate Air) filters, etc. These filters capture and remove microscopic particles. These filters capture and remove tiny particles, ensuring that airborne particulate matter remains at acceptable levels.
  

• Air Quality Control: Clean rooms usually utilize negative or positive pressure systems to prevent outside air from entering or inside air from escaping. This helps to maintain a clean environment.
  

• Installation location: The clean shed should be installed in a dry, ventilated, well-lit environment, avoiding direct sunlight. The installation location should also meet the special requirements of the relevant industries, such as anti-static, anti-corrosion and so on.

• Foundation construction: clean shed foundation construction should meet the design requirements to ensure that the foundation is flat, solid, level. After the foundation construction, acceptance should be carried out, qualified before the installation of clean shed.

• Frame Installation: The frame of clean shed is made of steel, and the verticality and horizontality of the frame should be ensured during installation. After the installation of the frame is completed, anti-corrosion and anti-rust treatment should be carried out.

• Roof and wall plate installation: the roof and wall plate should be used to purify the board or other materials in line with the clean requirements. When installing, it should ensure the flatness of the roof and wall plate, and tightness of the joints to avoid loopholes.

• Installation of air purification system: The interior of the clean shed should be equipped with an air purification system, including high-efficiency filters, air showers, ultraviolet disinfection lamps and so on. When installing, it should be ensured that the connection between each component is tight to avoid air leakage.

• Lighting system installation: the clean room should be equipped with lighting system, including LED lamps and lanterns. When installing, the waterproof and dustproof performance of the lamps and lanterns, as well as the uniformity of illumination should be ensured.

• Electrical system installation: the electrical system of the clean room should comply with the relevant national standards and industry requirements. Installation should ensure that the power supply is stable, safe, and the normal operation of the electrical equipment.

• Grounding: The grounding of the clean shed should meet the design requirements to ensure the safe operation of the equipment inside the clean shed.

• Acceptance and debugging: clean shed installation is completed, acceptance should be carried out. After acceptance, the clean shed debugging to ensure that the normal operation of the system to achieve the desired clean effect.

Cleanroom testing standards include:

There are many reference standards for cleanroom testing, mainly divided into domestic and international standards.

International Standards:

• ISO14644 series of standards, covering air cleanliness, air flow, temperature and humidity, differential pressure and other aspects of the test methods and requirements

• ISO14698 series of standards, covering the principles and methods of microbial monitoring of different cleanroom applications may need to refer to different standards, specific to the actual situation to choose the appropriate test items and methods.

Cleanroom testing methods:

• Empty state test: the clean room has been completed, purified air conditioning system has been in normal operation, no indoor process equipment and production personnel in the case of testing.

• Static test: clean room purified air conditioning system has been in normal operation, process equipment has been installed, no production personnel indoor test.

• Dynamic test: the clean room has been in the normal production state for testing. Clean room air volume, wind speed, positive pressure, temperature, humidity, noise testing, according to the general general, air-conditioning provisions of the relevant provisions of the implementation.

Hundred-level clean room work area air cleanliness test method for particle size greater than or equal to 0.5 microns of dust counting, it is appropriate to use light scattering particle counting method. For particle size greater than or equal to 5 microns of dust particle counting can also be used to filter membrane microscope counting method.