Huajiacai is a high-end display panel manufacturer withextremely stringent production environment requirements,making cleanroom environmental control particularly critical.The project scope includes:Facility HVAC systems (including cleanroom areas),PCW (Process CoolingWater) systems andExhaust systems.

The system employs Siemens S7-400H redundant PLCs asfield control stations to precisely regulate: Cleanroom temperature and humidity,Air cleanliness (e.g, particulate concentration)、Pressure differentials to ensure compliance with therigorous standards for display panel production.