Air purifiers can be sold to anyone who needs them, including home users, business users, medical institutions, schools and so on. Generally speaking, air purifiers are designed to improve indoor air quality, which can filter out pollutants in the air, such as fine particles, formaldehyde, benzene and other harmful substances, purify indoor air and protect people's health. Therefore, anyone who needs to improve indoor air quality and protect the health of himself and his family can buy and use air purifiers.