We have encountered many customers whose high-temperature factories are equipped with a large number of axial flow fans. But the workshop is still so stuffy, with so much dust and odor. What is the reason? If you stand next to the axis of the axial fan, you won't feel any airflow at all, even though there is a lot of wind on the axis. His airflow is linear. It rarely drives the surrounding air. Just like high-pressure water spraying, standing on the side of the water flow, your body won't get wet. The negative pressure fan is like a reverse spray. It absorbs air in the shape of a trumpet. It not only drives the air flow along the fan axis, but also rolls the air in the shape of a trumpet from the inside to the outside of the fan. When we stand near the fan axis, we will feel a strong air flow. Its characteristics determine its exhaust efficiency.
Another important point is that when installing a negative pressure fan, the wall on the fan side must be properly sealed. Especially there should be no gaps around the fan. We often see many customers installing many negative pressure fans themselves, but the workshop is still very stuffy, so they conclude that the negative pressure fans are also ineffective. I have visited many sites, often with a large window. After installing a fan, the window sashes next to the fan are all opened. It can be imagined that a large amount of air only circulates around the fan and cannot absorb the air from far away in the workshop.
The ideal method for installing a negative pressure fan is to close all the walls and nearby doors and windows on the fan side, and open the doors and windows on the opposite wall to ensure that the airflow flows in a straight line. If the window on the side wall of the fan also needs to be opened, the farther away from the fan, the better, in order to fully ensure that the airflow enters from the opposite side of the fan.
It is the artificial reproduction of the natural physical process of water evaporation and heat absorption Install a fan on one side of the enclosed factory building and a wet curtain on the other side. The fan extracts the high-temperature air inside the factory building, creating negative pressure in the entire space. In this way, after being cooled and filtered by the wet curtain, the indoor environment creates an ecological circulation effect, keeping the indoor air fresh and cool