Air purifiers mainly consist of high-voltage circuits, negative ion generators, ventilation fans, air filters, and other systems. During operation, the ventilation fan inside the machine circulates indoor air, and the polluted air is filtered through the air filter inside the machine to remove or adsorb various pollutants. In addition, a negative ion generator can ionize air, generate a large amount of negative ions, and send them out through a micro fan to form a negative ion flow, further cleaning and purifying the air.

Air purifiers mainly use various technical means such as physical filtration, electrostatic dust removal, chemical adsorption, negative ions, etc. to remove pollutants such as particles, bacteria, viruses, and harmful gases from indoor air, thereby improving indoor air quality. Its working principle can be summarized as inhaling indoor air, undergoing multi-layer filtration and purification treatment, and then releasing fresh and clean air back into the room.

As an invisible guardian of indoor air quality, air filters play a crucial role in improving indoor air quality. Firstly, air filters can significantly reduce the particulate matter content in indoor air, reducing the risk of respiratory diseases caused by inhaling particulate matter. Secondly, air filters can effectively remove microorganisms such as bacteria and viruses from the air, reducing the possibility of disease transmission. In addition, air filters can also remove indoor odors, improve indoor environment, and enhance people's quality of life.

Air filters are widely used in various places such as homes, offices, hospitals, schools, factories, etc. In homes and offices, air filters can effectively remove harmful substances such as particles and bacteria from indoor air, ensuring people's respiratory health; In hospitals and schools, air filters can reduce the risk of virus and bacterial transmission, providing a safe and healthy environment for teachers, students, and patients; In factories, air filters can remove harmful gases and odors, ensuring the physical health and production safety of workers.

Air filters use specific filtering materials to intercept and adsorb harmful substances such as particles, bacteria, viruses, pollen, dust mites, etc. in the air, thereby achieving the goal of purifying the air. Common filtering materials include fiber filter materials, activated carbon, high-efficiency filter paper, etc. They can capture particles of different sizes and effectively improve indoor air quality.