19世纪一些学者已肯定空气离子有生物学作用。在它生理作用尚不十分清楚之前,单极空气离子即已应用于治疗疾病。曾进行了数以百计的人群观察,证明空气离子对人没有明显的不良反应。通过呼吸道进入人体的空气离子,刺激肺内感受器、影响血流及内分泌。在某些字者的试验指出只有空气负离子存在时,才有治疗意义,而空气正离子只有在某些条件下才有较好的反应。离子浓度太小不产生明显的作用,而过量也有不利的地方,但不产 Some 19th century scholars have affirmed the biological role of air ions. Unipolar air ions have been used to treat disease until its physiological role is not well understood. Hundreds of people had conducted the observation, to prove that air ions on people no obvious adverse reactions. The air ions that enter the body through the respiratory tract stimulate the receptors in the lungs, affecting blood flow and endocrine. Experiments in some of the sellers have pointed out that only air negative ions are of therapeutic significance, whereas air positive ions only respond well under certain conditions. Ionic concentration is too small does not produce significant effect, but there are disadvantages of excess, but not produced