In modern technology and manufacturing, cleanrooms play a crucial role, especially in fields such as electronics, pharmaceuticals, and medical equipment that have extremely high environmental requirements. And pressure differential control in cleanrooms is a key link in maintaining the environmental quality of cleanrooms, whose importance cannot be ignored.

The pressure differential in cleanrooms refers to the pressure difference between the cleanroom and adjacent spaces. Maintaining an appropriate pressure differential helps prevent the invasion of contaminants and ensures that the air in the cleanroom is always in a high cleanliness state.

Pressure differential control in cleanrooms is based on the principle of air flow. Usually, by adjusting the volume of supply air and exhaust air, the indoor pressure can be made higher or lower than that of adjacent areas. When the supply air volume is greater than the exhaust air volume, a positive pressure is formed indoors; conversely, a negative pressure is formed.

1. Reasonable Design of Airflow Organization

- Carefully plan the positions, quantities, and forms of supply air outlets and exhaust air outlets to ensure uniform and stable air flow.

- Avoid airflow short circuits and vortex phenomena to improve the air purification effect.

2. Precise Air Volume Regulation

- Use high-performance fans and regulating devices to achieve precise control of supply air volume and exhaust air volume.

- Regularly calibrate the air volume measurement equipment to ensure the accuracy of air volume data.

3. Assurance of Sealing Performance

- Conduct strict sealing of the enclosure structure of the cleanroom, including connections of doors, windows, and wall panels.

- Select high-quality sealing materials to prevent air leakage.

4. Pressure Differential Monitoring and Alarm System

- Install sensitive and reliable pressure differential sensors to monitor pressure differential changes in real time.

- Set reasonable pressure differential alarm thresholds, and issue an alarm and take measures in time once the pressure differential exceeds the range.

5. Equipment Maintenance and Management

- Regularly maintain and service equipment such as fans, filters, and regulating devices to ensure their normal operation.

- Establish a complete equipment management file to record the operating parameters and maintenance conditions of the equipment.

1. Prevent Cross-Contamination

- Between areas of different cleanliness levels, maintaining an appropriate pressure differential can effectively prevent contaminants from spreading from low cleanliness areas to high cleanliness areas.

- For cleanrooms with biosafety requirements, pressure differential control is even more crucial to ensure the safety of personnel and the environment.

2. Ensure Process Stability

- A stable pressure differential helps maintain environmental parameters such as temperature, humidity, and air flow speed in the cleanroom, providing stable conditions for the production process.

- This is crucial for some production processes that are sensitive to the environment, such as semiconductor manufacturing and pharmaceutical production.

3. Energy Saving Optimization

- Through reasonable pressure differential control, excessive supply and exhaust of air can be avoided, reducing energy consumption.

- Achieve the goals of energy saving and environmental protection while meeting the cleanliness requirements.

In conclusion, pressure differential control in cleanrooms is a complex and key systematic project that requires comprehensive consideration of multiple aspects such as design, construction, equipment selection, operation management, etc. Only by strictly controlling each link and ensuring the accuracy and stability of pressure differential control can a reliable environmental guarantee be provided for the cleanroom to meet the needs of modern production and scientific research for a high cleanliness environment.