Fire smoke "single and double speed" refers to the two types of operating speed, namely single and dual -speed.
Single -speed fire smoke exhaust fan is relatively simple in structure. It has only one operating speed and is usually suitable for occasions that are not very high in smoking.The motor of this fan usually has only one winding. By changing the power supply of the power supply or adjusting the power supply voltage, the rotation direction of the fan is changed.Because there is only one operating speed, the range of air volume adjustment of single -speed fire firing fan is relatively small.
Double -speed fire exhaust fan is relatively complicated in structure and has two operating speeds, which is usually suitable for occasions with higher requirements for smoke.This fans motor usually has two winding, which can change the rotation direction and operating speed of the fan by changing the power phase sequence of the power supply or adjusting the power supply voltage.Double -speed fire exhaust fan can operate at high or low -speed operations according to actual needs, and has a greater air volume adjustment range.
Generally speaking, the single -double -speed fire smoke exhaust fan has different structural structures. Dual -speed fan has greater flexibility and regulation range, suitable for broader occasions.In practical applications, you need to choose the appropriate fan type according to specific needs and venue conditions.