The negative pressure fan is one of the commonly used fans, but the place requirement of this kind of fan is relatively strong. in general, it is installed in the high temperature factory building, and the negative pressure fan gives full play to its role and lowers the temperature of the factory building. in order to achieve the role of ventilation and ventilation, so it is very necessary to let the negative pressure fan play its cooling role as much as possible. This chapter is to introduce how to make the negative pressure fan to achieve the appropriate cooling effect. 

In general, if the axial fan is used in the factory building, the air flow can not be felt when standing next to the axis, so the air volume will lose a lot, and the effect of ventilation can not be brought into full play. But if you use a negative pressure fan, the effect will be much better. The negative pressure fan is like a reverse sprayer, which absorbs the atmosphere in a trumpet shape. in fact, it not only mobilizes the air flow on the fan axis, but also a trumpet-shaped rolling atmosphere in the fan. We will also feel the strong air flow when we stand under the fan axis. This characteristic determines its exhaust and high obedience. When installing the negative pressure fan, the wall of the fan must be sealed. 

In particular, there can be no open space around the fan. We often see many customers install a lot of negative pressure fans by themselves, but the workshop is still very stuffy, so they decide that the negative pressure fans have no result. Experienced people must have seen such a scene, often a large window, after the installation of a fan, the window sash under the fan is opened. It is conceivable that a large number of atmosphere is only circulating around the fan, of course, it can not absorb the atmosphere far away from the workshop. The effective way to install the negative pressure fan is that the walls of the fan and the doors and windows around it are all closed, and the doors and windows of the wall opposite the fan are opened to ensure that the air flow moves in a straight line.