Functions of Tunnel Fans
Tunnel fans (tunnel jet fans) are the core equipment of the tunnel ventilation system, mainly used to maintain air circulation in the tunnel, ensure safety, and control the environment. Their core functions can be summarized as follows:

Ventilation and Air Quality Maintenance

Exhausting harmful gases: Through forced ventilation, harmful gases such as carbon monoxide and carbon dioxide in vehicle exhaust are expelled from the tunnel to ensure fresh air.
Introducing fresh air: Through the longitudinal ventilation system of jet fans, external air is drawn in from one end of the tunnel, and polluted air is exhausted from the other end, creating a continuous airflow.

Fire Emergency and Smoke Exhaust

Rapid smoke exhaust: In case of a fire, the direction of the fans (such as bidirectional jet fans) can be adjusted to control the spread of smoke, providing a clear passage for personnel evacuation and fire - fighting operations.
Fire suppression: Reducing air circulation can slow down the spread of the fire and reduce the risk of damage to the tunnel structure.

Temperature, Humidity, and Visibility Regulation

Temperature control: Alleviate the heat accumulation generated by vehicle operation and prevent equipment failures caused by high temperatures.
Humidity management: Reduce the condensation of moisture in rainy and foggy weather, keep the road surface dry, and improve the visibility for drivers.

Energy Saving and Operation and Maintenance Optimization

Energy consumption adjustment: Control the fan speed through frequency conversion technology or inverters to reduce energy consumption and operation and maintenance costs.
Intelligent monitoring: Modern systems (such as vibration sensors) can analyze the fan status in real - time, reducing manual misjudgment and maintenance costs.