What is air handling equipment in cleanroom projects? Air handling equipment, technically called "air handling units" or "air conditioners", is a type of equipment in cleanroom projects that centrally processes air delivered to various rooms in the equipment room. Air handling equipment can be divided into two main types: fresh air handling units and recirculation air handling units.
First, Fresh Air Handling Units
For fresh air handling units in cleanroom projects, the working principle, system composition, accessories and differences are as follows:
1. Working principle. Fresh air handling units first introduce air into the main duct through piping, then supply fresh air to the unit through the branch duct system.
2. System composition. Consists of 5 parts: centrifugal fan for fresh air, axial fan with filter, hot water coil for preheating and reheating, chilled water coil for cooling and dehumidification, steam humidifier and insulation.
3. Accessories and differences. Demonstrated in 8 aspects: accessories and differences include electrostatic air mixer, steam preheating coil, ultrasonic humidifier, brine, direct expansion cooling coil or low-temperature ethylene glycol for dehumidification, VOC adsorption filter, silencer, VFP (variable frequency drive) control.
Second, Recirculation Air Handling Units
For recirculation air handling units in cleanroom projects, the working principle, system composition, accessories and differences are as follows:
1. Working principle. Recirculation air handling units first pass through air ducts, then through ULPA or HEPA filters, delivering air into the cleanroom.
2. System composition. Includes: high-efficiency centrifugal fan, filter, cooling/dehumidification (dry) coil.
3. Accessories and differences. Demonstrated in 3 aspects: reheat coil for local temperature control, steam or ultrasonic humidifier for local humidity control, constant air volume control box.
