Air negative ions, also called air negative ions, refer to O2 positive ions negatively charged due to unnecessary pairing of electronic devices. Because of negative charge, negative air ions can make floating dust, smoke, virus infection and bacteria gather in a positively charged room, losing the ability to float freely in the air and fall quickly, thus purifying indoor air. Green ecological negative ions are air negative ions with small particle size and high activity.

Negative ions can not only promote the production and storage of vitamins, but also strengthen and stimulate the physiological activities of the human body, so they are also called "gas vitamins". Like vitamins in food, they are very harmful to the life activities of the human body and other microorganisms. For example, after a storm, the negative ions in the gas increase and everyone feels happy.

In a central air-conditioned room, because the negative ions in the air are basically eliminated through a series of air purification systems and long ventilation pipes, people will feel chest tightness, shortness of breath, dizziness and lethargy for a long time, and their work efficiency and physical condition will decline, which is called "air conditioning syndrome". In the medical field, negative ions are identified as a reasonable way to eliminate pathogenic bacteria and purify the air. The key of its principle lies in the fusion of negative ions and bacteria, which makes the bacteria change their structure or migrate, leading to the death of bacteria and finally sinking into the road.

Medical clinical research shows that negatively charged particles in the air can increase the oxygen content in blood, which is beneficial to the transport, digestion, absorption and application of oxygen concentration, and has the functions of promoting basal metabolism, enhancing immunity, improving muscle energy and regulating the functional balance of the body. According to the qualification certificate, negative ions can inhibit, alleviate and assist the diagnosis and treatment of 7 system softwares and nearly 30 diseases, especially in human health care. Negative ions are also called "gas vitamins" in the medical field.

Air negative ions also have the effect of calming and destroying sleep. If you inhale a small amount of negative ions every day, it will be of great benefit to your physical and mental health: it will make you energetic, relieve fatigue and laziness, and improve your work efficiency. Improve the quality of sleep and eliminate mental weakness. Reduce the prevalence of diseases and prevent influenza and respiratory diseases. Improve the symptoms of cardiovascular and cerebrovascular diseases. Under the action of negative ions, it can improve the body fluid regulation of human bones, reduce the positive value of fitness exercise, and help athletes score, especially for some new events that need rapid response, such as 100 meter running and swimming.