How to choose the fan on the vacuum cleaner?
Fan is an integral part of forced ventilation and dust collection system. When selecting a fan, there should be 10 ~ 15 air volume reserve and 15 air pressure reserve. Usually, a production system chooses a fan. If the performance of fans is limited, and the air volume and wind pressure of one fan can't meet the requirements, the measures of series or parallel connection of fans are adopted, and it is best to choose two identical fans. For the series system, the wind pressure of two fans is added according to the constant air volume [the wind pressure at the working point increases, but not exponentially; Parallel system, according to the constant wind pressure, the air volume of two fans is added (the air volume of working point is not multiplied), and the matching is selected.