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What are the benefits of a cleanroom and how to calculate the air change rate in a Class 1000 cleanroom...

Source:TAI JIE ER
Published on:2025-08-12 17:10:12

  Cleanroom—what are its benefits and how to calculate the air change rate in a Class 1000 cleanroom?

  Is a cleanroom good? What are the benefits of a cleanroom?

  Is a cleanroom good? The answer is definitely yes. A cleanroom, also known as a sterile room or dust-free room, refers to a controlled environment where airborne particles, harmful gases, bacteria, and other pollutants are removed. It also maintains temperature, cleanliness, pressure, air velocity, airflow distribution, noise, vibration, lighting, and static electricity within specified requirements.

  What are the benefits of a cleanroom? Here they are:

  1. A cleanroom offers excellent moisture retention, durability, insulation, and heat retention, ensuring a comfortable working environment for employees and stable production conditions.

  2. A cleanroom is equipped with high-efficiency air filters and stainless steel ventilation grilles, which are easy to clean and aesthetically pleasing. The perforated aluminum panels are dust-resistant and easy to maintain, while the return air ducts are made of galvanized steel sheets with insulation.

  3. The flooring in a cleanroom typically uses epoxy self-leveling or high-wear-resistant plastic panels. Anti-static flooring can be selected if required.

  4. A cleanroom provides excellent cleanliness, is dust-resistant, energy-efficient, and environmentally friendly. Its cost-effective construction or renovation significantly reduces operational expenses.

  5. A cleanroom is easy to construct, lightweight (10-14 kg/m², about 1/30 of brick walls), and uses flexible color steel panels for walls and ceilings. The short construction time allows adjustments based on production needs, making renovations more convenient.

  Is a cleanroom good? What other benefits does it have? A cleanroom maintains consistent cleanliness, temperature, humidity, and pressure regardless of external air conditions. Its primary function is to control air cleanliness, temperature, and humidity, ensuring products are manufactured in an optimal environment.

  How to calculate the air change rate in a Class 1000 cleanroom? The air change rate is a critical parameter for cleanrooms. It represents the number of times the air volume in the room is replaced per hour (times/h). For example, if the air volume passing through the room in one hour equals the room's volume, the air change rate is 1 time/h. This rate determines the cleanliness level of a turbulent flow cleanroom.

  China's cleanroom design standard (GB 50073-2001) specifies the required air change rates for different cleanliness levels. The table below provides reference values for unidirectional flow cleanrooms at various classes.

  Different cleanrooms have different air change rates, particle capacities, filtration efficiencies, airflow rates, equipment, and costs. Therefore, the calculation method for a Class 1000 cleanroom should consider the room's cleanliness level, number of occupants, room area, dust generation sources, and fresh air ratio. Specific conditions must be accounted for in dynamic calculations.

  However, when calculating the air change rate for a Class 1000 cleanroom, avoid blindly designing airflow based solely on the air change rate. Instead, consider the room's heat and moisture surplus as well as the process requirements. Otherwise, the initial airflow may meet temperature and humidity needs but degrade over time.



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