There are significant differences between the range fume purifier and the range hood in terms of structure and working principle. Structurally, the range hood is more like a hair dryer, which smokes the smoke from one place to another to prevent the smoke from affecting the cooking master. Behind the grid of the range hood, there are usually two or more extractor fan systems, which are able to generate a strong suction force that quickly draws the fumes away. This is the basic working principle of a range hood. 
A range fume purifier is different from a range hood. The oil fume purifier not only exhausts the oil smoke like a range hood, it also has a purification function. Oil fume purifiers are usually equipped with filters or other purification elements inside, which can remove harmful substances in oil fumes, such as grease, particulate matter, odors, etc. After the fume purifier is treated, the exhaust gas is generally cleaner and safer. Oil fume purifiers can protect human health and the environment more effectively. Because oil smoke contains a variety of harmful substances, such as benzene, formaldehyde, etc., long-term inhalation of these substances will cause harm to the human body. The oil fume purifier can remove these harmful substances and reduce the harm to the human body. The direct discharge of unpurified oil fumes into the environment will also cause pollution to the environment, and the use of oil fume purifiers can reduce the harm to the environment. When the fumes are collected from the hood into the duct, they are sucked into the fume purifier. In the oil fume purifier, the oil smoke will go through a series of treatments, including adsorption, ionization and other processes. These processes can effectively remove harmful substances from oil smoke and achieve the effect of purification. 
Generally speaking, the purification efficiency of the oil fume purifier can reach more than 95%, and some can even reach more than 98%. In the Zhiyun series shown in the figure below, the purification efficiency has reached 98%, and it can be discharged directly. These highly efficient purifiers are effective in protecting the environment and human health, while also improving the air quality in the kitchen, allowing chefs to work in a healthier and more comfortable environment. In addition to the common fume purifiers, there are also some new fume hood fume purifiers on the market. These all-in-one machines combine a hood and a fume purifier into one, simplifying the process of installation and use, while also improving the efficiency of purification. 
In order to achieve the best purification effect, the oil fume purifier needs to be used at the same time with smoke hoods, air ducts, fans and other equipment. At present, some new fume hood fume purification all-in-one machines on the market simplify the installation and use process, and also improve the efficiency of purification, providing a healthier and more environmentally friendly choice for the catering industry.