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The interlocking function of a fast door is a safety feature that ensures that the door can only be operated in a specific way under certain circumstances. This feature is especially important in cleanrooms as it helps prevent cross contamination and maintain cleanliness. Here are some of the key points of the interlocking feature of a fast door.

1. Prevents simultaneous opening: The interlocking feature ensures that when one door is open, the other remains closed. This prevents direct contact between inside and outside air and reduces the introduction of contaminants.

2. Control airflow: The interlock feature helps to control the direction of airflow, ensuring that air flows from clean areas to non-clean areas and not the other way round. This helps maintain a positive pressure condition in the cleanroom.

3. Isolate the area: In the event of an emergency or contamination incident, the interlock function can quickly isolate the affected area and prevent contaminants from spreading throughout the cleanroom.

3. Improve personnel safety: Interlocks reduce the risk of injury by preventing personnel from entering or leaving the cleanroom with unsafe doors open. For example, when one door is closing, the interlock system prevents the other door from opening, preventing personnel from being struck by a fast-moving door.

5. Enhance equipment protection: The interlock function also protects equipment and materials in the cleanroom from damage caused by improper operation of the door.

6. Ensure sequence of operations: In certain processes where doors need to be opened or closed in a specific order, interlocks can help operators to follow the correct procedures and improve work efficiency.

7. Convenient for monitoring and management: Interlocking systems are usually integrated with the cleanroom monitoring system, making it easy for managers to know the status of the door and the environment of the cleanroom in real time.

The specific realisation of interlocking functions usually relies on a combination of door control systems and sensor technology. These systems can include electronic sensors, electromagnetic locks, mechanical interlocking devices, etc. to ensure that the door operates in accordance with predetermined safety and cleanliness requirements. In this way, the interlocking function of a fast door significantly improves the overall safety and operational reliability of the cleanroom.

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