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When the tunnel fan (shooting fan) runs, a part of the air in the tunnel is sucked from the fan of the fan. After accelerating through the impeller, it is ejected at a high speed of the other end of the fan. This part of high -speed airflow with high kinetic energy transmits energy to other gases in the tunnel, generating pressure to overcome the resistance of the tunnel, thereby promoting the flow of air flowing air in the tunnel. When the flow speed is attenuated to a certain degree, the next set of fan continues to work. In this way, the purpose of sucking fresh air from one end of the tunnel, the purpose of discharging dirty air from the other end.

The tunnel jet fan mainly has one -way aircraft fans and two -way jet fans. There are electronic and mechanical types of bidirectional aircraft. Can be switched to the fan rated speed in 30 seconds. To increase the muffler to the dry noise to reduce its noise. Product characteristics: The shell is squeezed by the machine tool, the inner wall of the inner wall of the leaf wheel section, the corrosion resistance, reliability, and economy, which can also increase the muffler to reduce its noise.Driven by direct connection, small maintenance workload.This fan is mainly used in the longitudinal ventilation system of highways and railway tunnels. The fan is generally hung on the top or sides of the tunnel. It does not occupy the traffic area and does not require separate air ducts. Low civil construction price is a very economical ventilation. When working, it can generate high thrust from a given energy. At this time, a part of the total air flow flowing through the tunnel was sucked into the fan. After the impeller was done, it was sprayed out of the exit at a high speed. Based on the principle of impact transmission, high -speed airflows will pass the energy to the air in the tunnel and promote the air in the tunnel to flow forward. When the flow speed is attenuated to a certain value, the next set of fan continues to work. In this way, fresh air is absorbed from the entrance of the tunnel, and polluted air is discharged from the exit end.