Dalian Bay Undersea Tunnel is equipped with jet fans to improve air circulation

The Dalian Bay Undersea Tunnel is equipped with jet fans, which can be automatically turned on according to the area when there is a traffic jam or the external environment changes, so that the air in the tunnel can circulate smoothly. In addition, in the event of a fire, fans in different positions can send air in the opposite direction to generate an "air barrier" for the accident area in the tunnel, forming a closed environment.