The principle of the smoke and oil mist purification unit is as follows: Under the effect of an applied high voltage, electrons are emitted rapidly from the surface or near the negative pole metal wires and move towards the positive pole, colliding with gas molecules and ionizing them. As the smoke and oil waste gas passes through this high-voltage electric field, the smoke particles become charged in a short time due to collision and capture of gas ions, and are then moved towards the positive pole dust collection plate under the force of the electric field, achieving separation. This product's electric field utilizes a modular design and a multi-stage purification process, significantly increasing the electric field strength and purification area. This allows for a longer interaction time between the electric field and the oil particles, and the activated carbon and adsorption devices installed internally can effectively remove cooking odors. Additionally, under the action of the high-voltage generator, a certain amount of ozone is produced within the electric field, which can also remove some odors from the smoke. Therefore, this equipment boasts strong smoke and oil removal efficiency and odor elimination capabilities.