Inspired by natural phenomena, people began to artificially generate negative ions, using pulse and oscillating electrical appliances to raise the low voltage to DC negative high voltage, and using DC high voltage at the tip of carbon brush to generate high corona and release a large number of electrons (e-) at high speed. However, electrons can't exist in the air for a long time (the lifetime of existing electrons is only ns), and they will be immediately captured by oxygen molecules (O2) in the air to form negative ions, which will be generated rapidly under the action of a strong negative electric field. In the process of ionization, negative ions move rapidly to the positive electrode, driving the nearby air to circulate, forming a so-called "ion wind", forming a negative voltage around the pole needle, so that the non-ionized air keeps pouring in and the ionized air keeps spreading outward. Its working principle is consistent with the phenomenon that natural phenomenon "thunder and lightning" produces negative ions. Released into the surrounding air, purifying the air and improving people's living environment. This kind of equipment for artificially generating air negative ions is called air negative ion generator or negative ion generator.

The main function of negative ion generator: (1) improving sleep: negative oxygen ions can refresh people, improve work efficiency, improve sleep and have obvious analgesic effect. (2) Making active oxygen: Negative oxygen ions can effectively activate oxygen molecules in the air, making them more active and more easily absorbed by the human body, effectively preventing "air conditioning diseases". (3) Improve lung function: After inhaling oxygen-carrying negative ions, the lung can increase the oxygen intake by 20% and expel 15% more carbon dioxide. (4) Promote metabolism: activate various enzymes in the body to promote metabolism. (5) Enhance disease resistance: it can change the body's response ability, activate the function of reticuloendothelial system, and enhance the body's immunity.

At present, some negative ion generating products have appeared. With the continuous research and development of technology, more advanced products have been produced, such as Senpeptide negative ion generator with two patented technologies, which overcomes the shortcomings of other products, such as ozone and other derivatives, small action range and concentration not reaching the action standard.