According to the book Environmental Health and Negative Oxygen Ions written by Professor Lin Jinming, a doctoral supervisor in Tsinghua University and an expert in Chinese Academy of Sciences, it is defined as follows: According to their mobility, positive and negative ions in the air can be divided into large, medium and small ions. Small ions have ion mobility greater than 0.4 ㎡/(v s), large ions have ion mobility less than 0.04 ㎡/(v s), and medium plasma is in between. Charged atomic groups or molecular groups close to molecular size belong to small air ions. These small air ions move fast, collide with each other in the atmosphere, and constantly gather to form large ions or middle ions. Only small ions or small ion groups can enter the body. Medical research shows that only small negative ions can easily penetrate the blood-brain barrier, act on the human body and play a role in medical care. Because small particle size negative ions have the characteristics of small particle size, high activity and long migration distance, they can reach a long distance without blowing with a fan.
At present, mankind has made a major breakthrough in the technology of generating small particle size negative ions (negative oxygen ions). The negative ion generator adopts the world-leading ecological negative ion generation chip and nano-fullerene negative ion releaser technology to generate ecological small particle negative ions equivalent to nature. Through the technology of ecological negative ion generation chip, small particles of negative ions can be generated, which can cover 4-5 meters outside without a fan, forming a negative ion forest bath environment and turning urban families into natural ecological environment. However, the small particle size negative ions released by nano fullerene negative ion releaser technology have high purity and do not contain ozone, positive ions and other derivatives.