Main materials and their characteristics

The materials used in a clean room typically include a metal frame, a transparent plastic sheet (such as polycarbonate or PVC), and an anti-static material. Metal frames provide structural strength and durability, while transparent plastic sheets ensure visual transparency for easy viewing of the interior. Anti-static materials, such as anti-static mesh curtains, are critical to maintaining internal static control, especially when handling sensitive electronic components.

The following factors need to be considered when choosing materials for clean booths:

• Chemical resistance: the material should be resistant to cleaning agents and disinfectants.

• Temperature resistance: It should be adaptable to the temperature fluctuations that may be present in the cleanroom.

• Light transmittance: High-quality transparent materials help to reduce energy consumption and provide even illumination.

• Maintenance and cleaning: the material should be easy to clean and maintain to maintain a dust-free environment.

Advantages in practice

Choosing the right material not only improves the performance of the clean shed, but also extends its service life and reduces long-term operating costs. For example, a clean room with anti-static mesh curtains can effectively control static buildup and protect internal equipment from static damage while reducing the introduction of external contaminants. In addition, the easy-to-install and dismantle design allows the cleanroom to be flexibly adjusted to suit different production needs and space layouts.

Laminar air flow:

• Advantages: Provides uniform cleanliness, easy to maintain and monitor.

• Disadvantages: Higher energy consumption and higher requirements for fans and filters.

Turbulent air flow:

• PROS: Lower cost and better space utilization.

• Cons: Difficult to achieve high cleanliness standards and tends to create vortex areas where contaminants can accumulate.

Mixed Stream Air Flow:

• Advantages: Balances the advantages and disadvantages of laminar and turbulent flow and is suitable for a wide range of cleanroom requirements.

• Cons: Complex design and difficult to control.

Installation points

• Site selection and foundation preparation: choose a dry, ventilated and dust-free environment for installation, and make sure the foundation is level and stable.

• Frame construction: according to the design drawings, assemble the steel profile or other materials into a frame to ensure verticality and levelness.

• FFU and Filter Installation: Install the fan filtration unit (FFU) and adjust the quantity and size according to the need, and choose the high-efficiency filter to enhance the cleanliness.

• Sealing and debugging: Ensure that all seams are sealed without leakage, carry out system debugging, and check the air flow and cleanliness to meet the standards.

Operation and Maintenance

• Regularly check the operating condition of FFU to ensure low vibration, no maintenance requirement and up to 30,000 hours of continuous operation.

• Use a differential pressure gauge to monitor filter status and replace them in a timely manner to maintain cleanliness.

• For cleaning and maintenance, use suitable dust-free tools and cleaning agents to avoid introducing contaminants.

Inspection Focus

• Inter-area airflow control: Test the pressure difference between areas to ensure that airflow flows from the clean area to the lower cleanliness area. Also, check the direction of airflow through openings such as doorways, walls and floors to ensure compliance with design requirements.

• Filter Leak Detection: Detailed inspection of high efficiency filters and their outer frames to detect potential breaks, gaps or other defects that could lead to contaminant penetration.

• Isolation Leak Detection: Through specialized testing methods, verify whether the building materials of the clean room have good sealing performance to prevent the intrusion of external pollutants.

• Indoor airflow control: According to the airflow pattern of the clean room, wind speed and direction tests are conducted to ensure that the airflow is evenly distributed and meets the design standards.

• Suspended particles and microbial concentration: After passing the above tests, the suspended particles and microbial concentration in the clean room are finally measured to verify that they meet the technical conditions of the clean room design.

Leak detection testing of HEPA filters in clean rooms typically includes the following key items:

• Filter material integrity testing: Checking the HEPA filter material itself for pinholes or other minor damage.

• Filter frame seal testing: Ensuring that the seal between the filter and its mounting frame is leak-free.

• Sealing inspection between the support frame and the mounting frame: Check whether the connection between the filter's support frame and the mounting frame is tight and free of gaps.

• Sealing inspection of filter periphery and edge frame: Ensure that there is no air leakage in the edge part of the filter.

• Inspection of the bonding points of the filter's mounting structure: Check whether the various connection points of the mounting structure are firm to prevent air leakage.