Modular Package Hygienic Air Conditioning System Ceiling Mounted AHU

Modular Package Hygienic Air Conditioning System Ceiling Mounted AHU

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.

Main function section description

l Mixed section

The air mixing section is used to mix air in different states, and to control and adjust the flow of air. Generally, it is equipped with a return air inlet and a fresh air outlet, and is equipped with a manual or electric air volume control valve.

l Primary-efficiency filter section

The primary filter section is used at the front end of the entire unit to intercept large particles such as dust and hair in the air, which can prolong the service life of the secondary filter. According to different wind speed, material, grade, thickness and technology, the initial resistance of the initial filter section is 150Pa, and the final resistance is about 120Pa.

l Medium-efficiency filter section

The medium-efficiency filter section is used at the back end of the primary filter section to intercept large particles such as dust and hair in the air, which can prolong the use of the post-filter. According to different wind speed, material, grade, thickness and process, the initial resistance of the initial filter section is 15-50Pa, and the final resistance is 120Pa.

l Sub-high-efficiency/high-efficiency filter section

The sub-high-efficiency filter section is used at the back end of the medium-efficiency filter section, intercepting dust and impurities with a particle size of 0.5μm in the air, with a moderate collection efficiency, which can extend the service life of the subsequent filter.

According to the wind speed, material, grade, thickness and process of the medium-efficiency filter section, its return force is 30-60Pa, and the final resistance is about 150Pa.

The filtration efficiency of the high-efficiency filter section can reach 99%, and its final resistance is about 300Pa. It is mostly used in high-grade clean rooms, operating rooms and other places with high cleanliness requirements.

l Coil dehumidification section

The coil dehumidification section is used to cool and dehumidify the air, and play a role in regulating the environment and environmental humidity. Generally divided into chilled water type and refrigerant direct expansion type.

l Heating section

It is generally placed after the surface cooling section to adjust the ambient temperature. It is generally divided into three types: hot water type, steam type and electric heating type.

l Humidification section

It is generally placed after the heating section to adjust the temperature of the environment, and is generally divided into dry steam type, electrode type, high pressure micro mist type, ultrasonic wave and wet curtain.

l Fan section

It is used to make the air in the local environment pass through the combined air conditioning unit and circulate, and do corresponding treatment according to requirements.

l Sterilization section

It uses air or oxygen as raw materials to generate ozone by high-frequency and high-voltage discharge. It is recognized as a broad-spectrum and highly effective bactericide in the world. Ozone has one more active oxygen atom than oxygen molecule. It has a very active chemical property and is a strong oxidant. It can quickly kill bacteria in the air at a certain concentration, without any toxic residue, and will not form secondary pollution.