How does an indoor air purifier work?
High-quality air purifiers drive air through the water filter, clearing it of fairly large particles. They still often have to be washed frequently. Electrostatic cleaners first charge the air passing through them, then attract the particles to an oppositely charged cleaning plate. This is how the air is purified. High-quality filters are also often used. You can find an example, a review at homelization will help you choose a good gadget for your home
A – Generally, air purifiers work by mechanical filtration, electrical attraction or a mixture of the two methods. Mechanical or “media” filters pull dust from the air as a fan propels the air through the filter. Electrical-attraction cleaners (ionic air cleaners) use a principle similar to “static cling” – they charge particles in the air or a collection device in the filter (or both) to create a magnetic attraction between particles and filter. Most tabletop and portable room air purifiers actually propel air through a combination of filters: a foam pre-filter to screen out large particles, the primary filter or electrical-attraction device to catch smaller particles, a carbon filter to remove odors and some gasses and a post-filter for any lingering particles.