The operation mode of two or more clean room centrifugal blower fan that draw air from the same intake pipe or intake chamber and simultaneously supply air to a common pipe is called parallel connection. In fact, in the process of using two fans to run in parallel, the effect of the same model on the parallel operation is different.
The two types of clean room centrifugal blower fan equipments with the same type are the same, so that when parallel connection is made, the characteristic curve of the fan after parallel connection can be obtained by the graphic method according to the principle that the wind pressure after the parallel connection is constant and the air volume of the two fans is superimposed. According to the analysis, after passing through the parallel connection, the air volume and wind pressure in the system are increased.
When two clean room centrifugal blower fan devices of the same model are connected in parallel, the wind pressure of each fan is greater than the wind pressure when one is opened. It can be seen that after two parallel fans of the same model are connected in parallel, the total air volume is not twice the air volume when a single fan is operated independently, but is less than twice, and the air volume in parallel does not reach the air volume of one fan. Degree.
There is another case, that is, two different types of clean room centrifugal blowers are connected in parallel, for example, one large and one small two fans are connected in parallel, wherein the gas only reciprocates and rotates inside the fan to generate heat, and only the large fan is in the system. Conveying gas.