Shandong Hanqi Industrial Co.,Ltd.
Shandong Hanqi Industrial Co.,Ltd.

A little knowledge about two-speed fire exhaust fan

 Today, let's take a look at what is a two-speed fire exhaust fan and what are the functions of the two-speed fire exhaust fan?


Two-speed fire-fighting smoke exhaust fan is suitable for fire-fighting smoke exhaust and ventilation in buildings, such as subways, tunnels, gymnasiums, high-rise buildings,underground shopping malls, workshops, ovens, etc. When the fire occurs, the electronic control system will automatically switch to high-speed operation, which can quickly remove smoke within half an hour, so that people in the fire can be evacuated safely, and the safety of life and property can be protected.


Transport air and other non-spontaneous, non-corrosive gases to the steel, no viscous substances are allowed in the gas, and the dust and hard particles contained in the gas are not greater than 150mg/m³. During ventilation, the inlet air temperature should not exceed 80 °C, and smoke during fire fighting, The gas temperature can run continuously for more than 30 minutes at 280℃.


The two-speed fire-fighting smoke exhaust fan has two types of air volume and power, and the speed and power can be changed during use. Generally, it is more common in basement smoke extraction projects.


The two-speed fire smoke exhaust fan is especially suitable, because the normal smoke exhaust and emergency smoke exhaust in the high-rise basement belong to the working state of two speeds. When the two-speed fire-fighting fan changes from low speed to high speed, the synchronous speed increases a lot, and the exhaust air volume also increases correspondingly. At this point, the system immediately changes from exhaust to smoke.


The two-speed fire-fighting smoke exhaust fan has a wide range of applications. According to the different requirements of users, a single-speed, two-speed and multi-speed types can be used to achieve the purpose of one machine for dual purposes (igeneral ventilation and high-temperature smoke exhaust during firefighting). If selected two-speed firefighting The smoke exhaust fan can start the low-speed state during normal pipe supply and exhaust, and can start the high-speed state in the event of a fire accident, providing time for personnel to evacuate in time.

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