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Equipos de HVAC y manejo de aire para salas limpias
Unidad de manejo de aire de recirculación
A high-volume return-air unit that recirculates filtered cleanroom air while handling sensible load and maintaining stable airflow.
- High Recirculation Airflow
- Low Fan Energy Path
- Stable Sensible Cooling
- Variable-Speed Air Volume
Introducción del producto
The recirculation air handling unit moves the high air volume needed for particle dilution without repeatedly conditioning the entire stream as outdoor air. Return air passes through accessible filters, a cooling or trim coil and direct-drive fans before returning to ceiling filters or supply distribution. Fresh conditioned air can enter upstream as a smaller measured quantity. Large coil face area and low-pressure-drop components reduce fan energy, while airflow control compensates for terminal filter loading and operating mode changes.
Características clave
A small conditioned fresh-air connection can be mixed with the return stream without oversizing the outdoor-air unit.
Direct-drive fan arrays provide turndown and service redundancy for continuous production areas.
Sensible trim cooling removes room and fan heat without duplicating full latent treatment.
Preocupaciones del producto del cliente
High cleanroom air-change rates magnify every unnecessary filter, coil and duct pressure loss in the recirculation path.
A small coil and filter bank create excessive fan energy at high recirculation volume.Expanded face area lowers component velocity and reduces pressure drop.
Terminal filter loading gradually reduces cleanroom air changes.Variable-speed fans maintain the scheduled airflow or duct static-pressure setpoint.
One large fan failure stops production airflow.A multi-fan array can continue at reduced capacity while one fan position is isolated.
Mixing humid outdoor air into the return stream destabilizes room moisture.A separate conditioned fresh-air connection introduces air at a controlled dew point.
Aplicaciones típicas
Large pharmaceutical cleanroomsSemiconductor clean productionMedical-device assembly hallsBattery manufacturing clean zonesHigh-air-change laboratories
Parámetros técnicos
The following ranges describe a high-volume cleanroom recirculation AHU casing.
| Materiales Core | Polyurethane or high-density mineral-wool acoustic and thermal panel insulation |
|---|---|
| Panel de espesor | 50–60 mm double-skin casing |
| Ancho efectivo | 1200–4200 mm nominal casing width |
| Longitud máxima | Up to 9000 mm for filters, coil, fan array and mixing section |
| Acero frente a espesor | 0.6–1.0 mm galvanized or coated casing skins |
| Densidad Core | 42–45 kg/m³ polyurethane or 80–110 kg/m³ mineral wool |
| Conductividad térmica | 0.022–0.040 W/(m·K) depending on panel core |
| Superficie acabada | Powder-coated outer skin with smooth galvanized or coated inner skin |
| Tipo conjunto | Gasketed low-leakage panel joints and bolted modular fan/coil sections |
| Customization | Disponible según la aplicación prevista y el entorno operativo. |
Opciones disponibles
EC fan wall with N+1 fan positionChilled-water or refrigerant trim coilReturn prefilter or fine-filter bankTop, side or end return and supply connections
Planning a Recirculation Air Handling Unit specification?
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