What parameters need to be recalculated before adding FFU to the old clean room?

Direct answer: Before installing FFU in an old clean room, the target and existing air supply volume, air flow distribution, return and return air balance, regional pressure difference, filter resistance, and power supply and control capacity should be recalculated. Also confirm the ceiling structure, installation and maintenance space. The number of additional installations should be determined by the 'gap between the current situation and the target' and cannot be calculated solely based on the newly added ceiling area.

Renovation of old clean rooms is different from new construction projects: the original air conditioning, return air, ceiling and control systems are already operational. IncreaseFFU will change the local air supply, but it does not necessarily solve the original insufficient return air, turbulent air flow at the door or unbalanced system air volume. Therefore, calculations should start from the actual measured current situation on site.

First create the 'before transformation' data

Record the number, operating gear and actual air volume of existing FFU and other air supply terminals; measure the wind speed distribution, cleanliness and pressure difference in adjacent areas at key locations. Synchronously check whether the personnel equipment layout has changed, filter status, return air outlet location, and existing power supply and console accounts.

If the actual air volume on site is significantly lower than the original design value, the filter resistance, control settings, or air inlet and return conditions should be identified first. Directly converting the gap caused by equipment failure into the number of new FFU units may cause the air volume of the repaired system to be too large.

Recalculate five sets of parameters according to changes

FFU mainly provides filtered local air supply. The room's fresh air demand and overall air balance should still be checked together with the original air conditioning and air supply and return systems, and cannot be judged solely by the number of FFU units.

The suspended ceiling and maintenance conditions determine whether the installation can be implemented on the ground.

The ceiling modulus, load-bearing and fixing conditions, available height, and the location of beams, light fixtures, sprinklers and access openings should be checked. NewThe efficiency, resistance, sealing and replacement direction of the HEPA or ULPA filter should also correspond to the installation location.

If the calculated number of FFU cannot be arranged reasonably, the single unit specifications, installation location and airflow plan should be re-evaluated instead of evenly placed on the drawing.

How does Aili Industry cooperate with the expansion of old clean rooms?

Aili Industrial's motors, fans, control systems, sheet metal and filters are all self-produced and self-developed, and the entire machine can be matched around the size restrictions, air volume gaps, filtration requirements and existing control interfaces of the old clean room. For standard ceilings or space-constrained locations, a prototype can be used to check the size, performance under target air volume, control compatibility and maintenance methods before proceeding with partitioned installation.

After the new FFU is installed, the air volume, air flow at key locations, cleanliness and regional pressure difference should be re-measured according to the technical agreement, and the operating status of the original system should be confirmed. Specific specifications, quantities and transformation effects are subject to test results under project conditions.

The most critical sentence before installation: first confirm whether the lack is the total air volume, local air flow, or the control and return air capabilities of the original system. The problems are different, and the methods for determining FFU specifications and quantities are also different.