Negative pressure fan, though without the use of axial flow fan and centrifugal fan less common, but and never means it does not have what advantage, although there are some places installed axial flow fan, but the indoor environment and obviously didn't improve much, still very hot, this case, install the suction fan is a good choice.

If you stand next to the axis of an axial fan, you really don't feel any air flow, even though there is a very small wind above the axis. Its flow is linear. It's very hard to drive the air around it. Just like a high-pressure faucet spraying water, standing at the tail of the stream, you will never dry out.

The negative pressure fan is like a reverse sprayer. The absorption of the atmosphere is like a horn. In fact, it not only mobilizes the air flow of the fan axis, but also changes the air flow of the horn from inside the fan to the outside. This characteristic determines its complete exhaust and high service self. When placing the negative pressure fan, the wall of the fan must be sealed.

It is conceivable that a large amount of atmosphere is only around the fan circulation, after all, can not absorb the atmosphere in the distance of the workshop. The most accurate way to place the negative pressure fan is that the wall of the fan and the surrounding doors and Windows are all closed, and the doors and Windows of the wall next to the fan are opened to ensure that the air flow is in a straight line. If the window of the fan tail wall should also be opened, then the farther away from the fan, the better, the purpose is to enrich the guarantee air flow from the fan next to enter.

After the cooling effect of the negative pressure fan is achieved, then its effect will be very small guarantee, perhaps also lies in the quality of its products when consumers choose the negative pressure fan. The first quality can be guaranteed, and it can be used as a foreshadowing for its role.