Medical research has shown that small particle size negative ions have a health care effect on the human body. Because only a small particle size negative ions are easy to pass through the human blood-brain barrier, play its biological effect. Negative air ions in nature to create many longevity villages, because of the high proportion of small particle size negative ions, small particle size negative ions due to high activity, migration distance and thus the formation of negative ions over the longevity of the region over the negative ions bath environment, the reason why many negative ions home appliances have poor results, because of the use of traditional negative ions to generate technology is difficult to generate a small particle size of the ecological negative ions. The role of human health care in general, only dust removal and dust reduction effect, generally used in the field of air purification more.