Fireproof rolling shutter door is a safety device widely installed in shops, supermarkets and warehouses near the street. Because of different application places, it has a variety of control opening ways. Today, we will introduce the single weak current control fireproof rolling shutter door.

单体弱电控制防火卷帘门就是通过烟气和温感装置来与防火卷帘门联动，这样就能实现自动控制。防火卷帘门厂家生产的卷帘门采用双电源和多种控制方式，使用起来非常方便。但即便是这样，发生火灾时电源被切断，防火卷帘门也就无法开启使用。即便是用手动控制装置，也很难操作。
                                  

The single weak current control fire shutter door is linked with the fire shutter door through smoke and temperature sensing device, which can realize automatic control. The rolling shutter door produced by the fireproof rolling shutter door manufacturer adopts double power supply and various control modes, which is very convenient to use. But even so, when the power is cut off in case of fire, the fire shutter door can not be opened. Even with manual control, it is difficult to operate.

为什么拥有手动控制装置也无法在发生火灾时使用防火卷帘门呢？防火卷帘门厂家对此进行了一系列测试，发现在一般民用建筑发生火灾时，烟气水平方向流动速度在0.3--0.8m/s左右，垂直方向扩散速度为3--4m/s。在这种情况下，救援人员无法在火灾现场停留。换言之，如果发生火灾，救援人员不在卷帘门附近就无法手动操控卷帘门下降，防火卷帘门也就无法发挥作用，所以需要设计单体弱电控制开启方式。

Why is it impossible to use fire shutter doors in case of fire with manual control device? A series of tests have been carried out by fire shutter manufacturers. It is found that the horizontal flow velocity of smoke is about 0.3-0.8m/s, and the vertical diffusion velocity is 3-4m / s in general civil buildings. In this case, rescue workers can not stay at the scene of the fire. In other words, if there is a fire, if the rescue personnel are not near the rolling shutter door, the rolling shutter door can not be manually controlled to fall, and the fireproof rolling shutter door can not play its role, so it is necessary to design the opening mode of single weak current control.