Working Principle and Application of Ventilation Air Valves

Jan 01, 1970

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Introduction to Ventilation Air Valves

Ventilation air valves are indispensable terminal accessories in the air conditioning systems for the ventilation, air conditioning, and air purification projects of industrial plants and civil buildings. They are generally used in air conditioning and ventilation system ducts to adjust the airflow of branch pipes and can also be used for the mixed adjustment of fresh air and return air. As an important control device, ventilation air valves from Aier ventilation are widely used in building ventilation, industrial manufacturing, environment, and energy conservation projects.

The airflow control of the ventilation damper does not require external power; it relies on the airflow force inside the duct to position the control valve, thereby keeping the airflow at the pre-set volume within the entire pressure differential range.

Structure and Working Principle of Ventilation Air Valves

Valve Body

Acts as the basic framework of the ventilation damper, supporting the entire device and connecting to the ventilation duct.

Blade

Installed inside the valve body, it adjusts the air passage area through rotation, thereby controlling the airflow volume.

Drive Mechanism

Includes manual or electric driving modes for operating the opening and closing angles of the blade.

Seal

Ensures effective isolation of airflow when the damper is closed, improving energy efficiency.

Working Principle of the Ventilation Air Valve

The working principle of the ventilation damper is based on simple mechanical principles: when it is necessary to adjust indoor air circulation, the blade can be rotated manually or electrically to change its angle relative to the airflow direction.

The larger the opening angle of the blade, the more the airflow; conversely, it reduces. Additionally, the ventilation damper can also adjust the airflow direction by precisely controlling the blade angle.

Application Areas of Ventilation Air Valves

Building Ventilation

In the construction industry, ventilation air valves are mainly used to regulate the exchange of indoor and outdoor air and improve air quality. For example, in air conditioning systems and fresh air units, they are used to adjust the airflow volume and direction to meet comfort and energy-saving requirements.

Industrial Manufacturing

In industrial environments, especially in scenarios involving high temperatures or harmful gas emissions, ventilation air valves can effectively control and adjust gas flow to ensure production safety and improve production efficiency.

Environment and Energy Conservation Projects

Ventilation air valves also play an important role in environmental protection projects, such as air purification systems and exhaust gas treatment devices. By using precise damper control systems, they achieve energy-saving and emission-reduction goals.