Use of glass blower in recent years is gradually expanding, however, we use, we will always find its use, there are some functions or is imperfect, the following, we will look at it together. 1, a lot of glass and steel roof fan is not set air backflow prevention device after the shutdown, or fiberglass dust after fan stop valve can not be reliably closed, a large shop for hot heat loss can not be underestimated. We often see dust FRP fans and axial fans no backstop device, fans rotate at high speed under heat and pressure, wind speed pressing explain this phenomenon caused considerable wind speed hairdryer within reach 0 ~ 3.0m / s or higher. Reverse fan motor starts at a disadvantage, starting current may be due to excessive damage. 2, anti-condensation glass blower poor performance, winter indoor and outdoor temperature difference, the hairdryer cause condensation, resulting in water dripping phenomenon, as well as affecting the normal production. 3, dust FRP fan must have reliable in rain, snow and wind and sand basic performance, but now a lot of dust glass blower was designed with only rain function, ignoring the snow and sand into the fan not only from the top, In the outdoor wind speed reaches a certain intensity of the situation, also may enter the fan from the bottom. Some use internal activities as dust Venetian glass blower air backstop device can prevent snow falling in the room looks, in fact, the snow accumulation on the activities blinds, room temperature after thawing can cause dripping phenomenon, can not play against snow effect. 4, in the typhoon-prone areas and sandstorms, dust FRP fan anti strong winds are less capable of the high center of gravity, the plane and concave configuration increases the drag, umbrella rain hat against the strong wind performance to be desired. 5, some dust FRP fan security guaranteed not well, we have not set up robust and reliable safety net in the lower part of the fan, decorative outlet alone can not guarantee detached when the motor is off and the blades break not fall injury. 

palabras clave: FRP fans, FRP fan, FRP fan,