This series of products is based on the traditional precision oil purifier, the control system is upgraded to a PLC control system, and an online particle counter is added to monitor the oil cleanliness in real time. When the oil cleanliness reaches or exceeds the preset value of the equipment, the equipment switches to energy-saving mode. When the system detects that the oil cleanliness exceeds the standard, the system starts the standard purification working mode, thus realizing the closed-loop control of oil cleanliness management. On the one hand, this operating mode can save energy and reduce consumption, and on the other hand, it can reduce equipment wear to a certain extent and extend the service life of equipment and filter elements.