How to perform partition control on multiple FFUs in a lithium battery clean environment?
**Direct answer:** First divide the control zones according to the process area, cleanliness requirements and operating time, and then determine the position number, communication address and power supply circuit for each FFU. The target air supply for each zone is set for working and non-working states, and the actual air volume corresponding to the control gear is confirmed through on-site testing. The controller capacity and expansion location should be determined before mass installation.
The equipment, personnel passages and material transfer areas in the lithium battery production line may be responsible for different cleaning tasks. Multiple unitsIf all FFU fan filter units use the same speed setting, they may not be suitable for every area; if they are only grouped evenly by the number of equipment, the process location may not correspond to the control partition.
When partitioning, look at the craftsmanship first, then the wiring.
Control zoning should be consistent with the process equipment and return air range on the floor plan. The FFU within a zone should have clear cleaning targets, target air volumes and operating rules; if different process areas require independent speed adjustment, they should be marked separately on the drawings.
The power supply and communication cabling are then mapped to the zones, confirming the device number, address and controller ownership of each FFU. In this way, when debugging personnel see abnormal air volume in a certain area, they can accurately find the relevant equipment instead of checking one by one.
What controls should be written clearly for each partition?
Control content |
The project needs clear requirements |
working mode |
Whether to start and stop during production, line shutdown or maintenance status, and what gear to use |
speed target |
The zone air volume or key position wind speed that each mode needs to achieve |
status feedback |
Whether operation, communication and fault status information is required |
Address and expansion |
Existing device number, reserved address and subsequent new areas |
Exception handling |
Project-agreed handling of communication interruptions or equipment failures |
The low-speed mode planned to be used cannot be set only according to energy-saving needs. After the FFU is equipped with the specified filter, the actual air volume and airflow distribution in this mode must still meet the project requirements of the corresponding area.
The performance of the control system and the entire machine must be verified together
The FFU group control system can be used to plan zone speed regulation and status management of multiple devices, but the control setting value is not equal to the actual air supply volume. Filter resistance, operating gear and installation conditions will all affect the FFU operating point. During the prototype stage, command execution, address settings, and air volume in each mode should be verified; after on-site installation, the zone airflow and cleanliness should also be checked.
Aili Industrial's fans, motors, control systems, sheet metal and filters are all produced and developed in-house. After the process partition is determined for the lithium battery project, the motor speed regulation, fan air supply, filter resistance and control interface can be matched simultaneously, and the complete machine configuration can be adjusted according to the equipment end or ceiling conditions. Specific control functions, zone settings and air supply performance are subject to the project technical agreement and actual test results.
**The key to zone control is to allow each control zone to obtain the required air supply under specified operating conditions. **The equipment number, control gear and air volume measured on site should be able to correspond one to one.
