How does the Floor Vacuum Cleaner's filtration system ensure fresh air?

The Floor Vacuum Cleaner's filtration system is an important line of defense to ensure fresh indoor air. It achieves this goal through multiple filtration processes and advanced technical means.
First, primary filtration is usually undertaken by a filter with larger pores. This filter is mainly responsible for intercepting larger particles of dust, hair, debris and other substances. When the vacuum cleaner starts working, the air is sucked in with various pollutants. The primary filter is like a first barrier, blocking most of the visible large particles of impurities. For example, when cleaning the living room floor, large particles of garbage such as pet hair and food residues will be captured by the primary filter first, preventing them from entering the subsequent filtration process, reducing the burden on subsequent filtration components, and also avoiding large particles from damaging other parts inside the vacuum cleaner.
Intermediate filtration often uses HEPA filters (high-efficiency air filters). HEPA filters can filter out tiny particles such as pollen, dust mite excrement, bacteria, viruses, etc. The filtering principle is that through the fine fiber structure, these tiny particles are adsorbed or intercepted by the fibers when the air passes through. The filtration efficiency of the HEPA filter is extremely high. For particles larger than 0.3 microns, its filtration efficiency can reach more than 99.97%. In the bedroom environment, people with pollen allergies can use the HEPA filter of the vacuum cleaner to effectively remove pollen in the air and reduce the occurrence of allergic symptoms; in homes with pets and dust mites, the HEPA filter of the vacuum cleaner can absorb tiny pollutants such as dust mite excrement, purify indoor air, and reduce potential threats to human health.
Some high-end floor vacuum cleaners are also equipped with activated carbon filters. Activated carbon has a strong adsorption capacity and can remove odors, harmful gases, etc. in the air. When the air passes through the activated carbon filter, volatile organic compounds such as formaldehyde, benzene, TVOC, and odors such as pet odors and kitchen fume odors will be adsorbed by the activated carbon. For example, in a newly renovated room, the activated carbon filter of the floor vacuum cleaner can absorb harmful gases such as formaldehyde during the cleaning process, accelerate the purification process of indoor air, make the indoor air more fresh and pleasant, and create a healthy and comfortable indoor environment for the residents.
In addition, some advanced floor vacuum cleaners use cyclone separation technology combined with the filtration system. Cyclone separation technology uses high-speed rotating airflow to generate centrifugal force to separate larger and heavier particles from the air and throw them into the dust bucket, further reducing the pressure on the filtration system and improving the filtration efficiency and air purification effect. At the same time, the filtration system of the vacuum cleaner focuses on sealing performance in design to prevent unfiltered air from leaking back into the room, ensuring that only fresh air that has been filtered layer by layer will be discharged into the indoor environment.