Hebei shijiazhuang gaoyang county ultra clean da pre-filter work when the size of the fan blade is turning at the same time?

No. Ultra-clean pre-filter is usually equipped with a small fan and a large fan two kinds of fans, the small fan is used to provide negative pressure for the pre-filter, so as to let the air flow through the pre-filter, while the large fan is mainly used to discharge the purified air. Therefore, during the normal operation of the Ultra Puritan prefilter, the small fan and the large fan are not running at the same time. When the UltraCleanTech Pre-Filter begins to operate, the small blower starts first and generates enough negative pressure to draw air into the filter. Then, after the pre-filter has filtered and purified the incoming air, the big fan will start to discharge the purified air and also drive the small fan to continue working.