The difference between the electrostatic fume purifier and the mechanical fume purifier is mainly manifested in the following aspects: first, the electrostatic fume purifier adopts electrostatic precipitator technology, which adsorbs the fume particles on the electrode through the action of the electric field, so as to achieve the purpose of purification. The mechanical oil fume purifier uses mechanical filtration to intercept the oil smoke particles through mechanical filtration, so as to achieve purification. 
Secondly, the purification efficiency of the electrostatic oil fume purifier is relatively high, generally reaching more than 90%, which can effectively remove particulate matter and harmful gases in the oil fume. The purification efficiency of the mechanical oil fume purifier is relatively low, generally about 70%, and the removal effect of some fine particles and harmful gases may not be ideal. In addition, the maintenance cost of electrostatic oil fume purifier is relatively low, because its core components are electrodes and electric fields, which are relatively simple and convenient to maintain. Mechanical oil fume purifiers, on the other hand, need to replace filters and other components regularly, which is costly. 
Finally, the safety of the electrostatic oil fume purifier is also high, and there will be no safety hazards such as open flames. Mechanical fume purifiers, on the other hand, have potential safety hazards such as fire, which require special attention. 
To sum up, the difference between electrostatic fume purifier and mechanical fume purifier is mainly manifested in technical principles, purification efficiency, maintenance cost and safety. In practical applications, it is necessary to select the appropriate purifier type according to the actual situation to achieve the best purification effect.