How to choose FFU working mode? What parameters should we pay attention to in different operating states?
Direct answer: To determine the FFU working mode, you should first clarify when each process area requires continuous air supply and when speed adjustment is allowed, and then check the air volume, static pressure, wind speed uniformity, power consumption, noise and control response in each mode. Whether low speed or standby mode can be used must be determined by the results of cleanliness and air flow verification, and cannot be set solely based on energy saving goals.
Clean room and equipment-side FFU may adopt fixed operation, step-by-step speed regulation, zone control or centralized group control. Once the working mode changes, the air volume and airflow distribution will also change. Therefore, chooseWhen using an FFU fan filter unit , the operating mode and process requirements should be written into the technical conditions together, instead of deciding on the gear after installation is complete.
First clarify the operational needs of each region
The project should list the status of production, non-production, cleaning and maintenance, etc., and explain which areas need to continue to maintain air supply and which areas can adjust the gear. If there are local high cleanliness requirements, it should also be separately confirmed whether the equipment-side FFU must run synchronously with the main equipment.
The name of the operating mode does not determine the actual effect. Even if they are all called 'low speed mode', the air volume of different FFUs may be different; the actual measured performance data of each gear should be used to judge.
Focus on checking the air volume and static pressure in each mode
The assembly specification should be checked for each mode intended to be usedHEPA or ULPA filter . Air volume and static pressure of FFU under project resistance conditions after Just because the high-speed gear reaches the target air volume, it does not mean that the low-speed gear can also meet the cleaning requirements.
Wind speed uniformity and airflow at critical locations at the equipment end should also be checked. After the filter resistance increases, the actual air volume of each gear may change, and this should be included in the operation, maintenance and speed adjustment strategy.
Energy savings, noise and control response are evaluated together
Long-term running projects can compare the power consumption and noise of different motors and speed control schemes at commonly used gears. If the project considersof the EC/DC FFU solution should also be judged based on the performance data, electrical conditions and maintenance requirements under the target operating conditions.The suitability
When multiple FFUs run together, it is necessary to clarify partitions, gear switching rules, communication interfaces, status feedback, and exception handling methods. useFor FFU group control system projects, it is advisable to verify the compatibility of FFU and the control scheme during the prototype stage, and confirm the actual air volume after mode switching.
Use testing to determine final working model
The prototype test should cover the gears planned to be used in the project, not just the highest gear. During on-site commissioning, the air volume, wind speed distribution, cleanliness and pressure difference in relevant areas should be verified under the agreed operating conditions. Only if the test results meet the technical agreement can a certain gear be used as the official working mode for the area.
Aili Industrial can match the fan, motor and complete machine control solutions based on process operation time, cleanliness target, target air volume, filter configuration and control requirements. For batch projects, it is recommended to first confirm the performance of each mode of the prototype, and then determine the partition settings and delivery requirements. The specific working mode and performance are subject to the project technical agreement and on-site verification results.
Q: Can the FFU be directly adjusted to the lowest setting when it is not in production?
Answer: You should first confirm the cleanliness and airflow requirements in this state, and use on-site testing to verify whether the lowest gear meets the requirements.
Q: Is it okay to only measure the highest air volume?
Answer: If the project plans to use multiple working gears, the performance of each gear under the specified filter and actual resistance should be confirmed separately.
Q: What should be determined in advance for a group control project?
Answer: Control partitions, gear switching rules, communication interfaces, status feedback and exception handling requirements should be clearly defined.
