Specific reasons:
⑴ The general air purifier has only four layers of filtration, while the air health instrument has seven layers of filtration, which can adsorb dust, pm2.5, formaldehyde, benzene, sterilize, deodorize and prevent mites, with more comprehensive filtration range and better purification effect.
(2) Air purifiers generally have no function of releasing negative ions, although some also have the function of releasing negative ions. However, due to the backward working principle and technology, the concentration of negative ions can only reach several million per cubic centimeter at most. (The negative ion air purifier adopts a closed structure and adopts a positive and negative electrode corona process, which produces less negative ions and more ozone. If we want to increase the number of negative ions to 20 million per cubic centimeter, it will inevitably produce excessive ozone, which is harmful to human health. So, therefore, the negative ion function of the air purifier can't meet the hygienic standard of health care and treatment, and it has no effect and is useless in name only.
The negative ion air health instrument adopts an open structure, and the polar needle is the negative electrode, which is extremely large. This process design produces more negative ions (which can reach the standard of more than 20 million) and less ozone, so the effect is better.