Hygienic AHU Hygienic Air Handler Used In Hospitals

What is a Hygienic Air Handler?

Hygienic air handlers are customized industrial refrigeration air handling systems that supply clean, filtered and conditioned air to food processing rooms and critical process areas. The supplied air is managed by the air handler to control strict room climate conditions, with the ultimate goal of creating an environment promoting higher levels of sanitation while hindering bacteria growth and spread.

How do Hygienic Air Handlers promote sanitary conditions in food processing rooms?

Food producers work hard to ensure our food supply is safe. Successfully eliminating opportunities for food contamination starts with sanitary food conditions. Hygienic air handlers control the air delivered to processing, packaging and storage areas in the following ways to greatly improve sanitary conditions and reduce contamination sources:

1. Pre Filter Fresh Outdoor Air - Remove contaminants from incoming air.

2. Provide Room Cooling - Maintain room cooling setpoints to hinder bacteria growth.

3. Control Humidity - Prevent condensation inside processing rooms to eliminate opportunities for bacteria to spread.

4. UV Lights for Sterilization - Kill bacteria on cooling coils.

5. High Filtration with Final Filters - Filter contaminants from entering the ductwork and room.

6. Supply Positive Room Pressure - Processing rooms under positive pressure block infiltration of airborne contaminants from adjoining rooms and hallways.

7. Energy Efficient Operation - Uses pre-cooled return air to greatly reduce cooling load.

8. Eliminates the Need for Ceiling Mounted Cooling Units - Equipment is typically located on the building rooftop. No mechanical equipment on ceilings in critical process rooms. Promotes sanitary room conditions, safety and effective room cleaning.

AHU model representation method:

Unit quick selection table (air volume)

Note: 1. It is recommended to add a water baffle if the wind speed exceeds 2.75m/s.

Unit quick selection table (cooling capacity of coil section under return air condition)

Note:

1. The inlet temperature of chilled water is 7°C, and the outlet temperature is 12°C;

2. Return air condition: inlet air dry bulb temperature 27℃, wet bulb temperature 19.5℃;

3. The above parameters are for reference only. If the working conditions and coil circuit arrangement are changed, the parameters will change.

Unit quick selection table(cooling capacity of coil section under fresh air condition)

Note:

1. The inlet temperature of chilled water is 7℃, and the outlet temperature is 12℃;

2. Fresh air conditions: inlet air dry bulb temperature 35℃, wet bulb temperature 28℃;

3. The above parameters are for reference only. If the working conditions and coil circuit arrangement are changed, the parameters will change.

Unit quick selection table(hot water coil heating capacity)

Note:

1. The inlet temperature of hot water is 60°C, and the outlet temperature is 50°C;

2. Return air condition: inlet air dry bulb temperature 15℃; fresh air condition: inlet air dry bulb temperature 7℃;

3. The above parameters are for reference only. If the working conditions and coil circuit arrangement are changed, the parameters will change.

Unit quick selection table(steam coil heating capacity)

Note:

1. Heating conditions, the inlet air dry bulb temperature is 7℃;

2. The structure of the heater is a steel pipe wound around a steel fin;

3. The above parameters are for reference only. If the working conditions and coil circuit arrangement are changed, the parameters will change.

Unit quick selection table(parameter table of DX outdoor unit of clean room air conditioning unit)

Note:

1. The above models are for reference only, and different working conditions will lead to different parameters;

2. Compressor frequency conversion series can be customized according to non-standard;

Note:

1. Cooling capacity calibration working condition: ambient temperature 35℃, inlet air temperature 27/19℃;

2. Heating capacity calibration working conditions: ambient dry and wet bulb temperature 7/6℃, inlet air temperature 20℃;

3. The above parameters are for reference only. If the working conditions are changed, the parameters will be changed.

Workshop showing: