The working principle of various oil fume purifiers is not complicated, but how to work stably for a long time in the environment of high temperature and high humidity, power grid turbulence and air pollution is the key technology. The performance difference between high-end and low-end products is greater than that between minivans and Mercedes-Benz off-road vehicles. The purpose of installing purification equipment is to avoid trouble, not to make trouble. If the equipment failure rate is high, frequent equipment maintenance will be very troublesome even if the after-sales service of the manufacturer can keep up.