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Ventilation: through the replacement of indoor and outdoor air circulation, the indoor free formaldehyde is discharged, thus achieving the purification effect.

Physical adsorption: activated carbon is commonly used, which has strong adsorption capacity and can adsorb free formaldehyde in the range, thus achieving purification effect. It should be noted that activated carbon has an upper adsorption limit and needs to be replaced in time.

meaning

There are many different technologies and media in the air purifier, which can provide users with clean and safe air. Commonly used air purification technologies include: adsorption technology, negative (positive) ion technology, catalysis technology, photocatalyst technology, super-structure photomineralization technology, HEPA high-efficiency filtration technology, electrostatic dust removal technology and so on. Material technology mainly includes: photocatalyst, activated carbon, synthetic fiber, HEPA efficient material, negative ion generator, etc. The existing air purifiers are mostly compound, that is, multiple purification technologies and material media are adopted at the same time.

Of course, these also depend on everyone's needs.