人们在使用空调时,常常将门窗紧闭,室内外空气不对流,致使室内小环境的卫生状况变差,有利于一些致病性细菌、病毒生长繁殖;目前市售空调机大多数尚无空气交换装置及负离子发生装置,致使空调提供的再循环气体缺少人体需要的负离子。据测定,装有空调的房子比普通居室负离子少80％,这不仅可引起精神不振、头晕、记忆力下降等不适,还可使人抵抗力下降。 When people use air conditioners, windows and doors are often closed, indoor and outdoor air is not convection, resulting in poor indoor sanitation conditions conducive to the growth of some pathogenic bacteria, viruses; the majority of commercial air conditioners currently have no air Exchange device and negative ion generating device, resulting in the lack of recirculation of air conditioning air needed by the body negative ions. It is determined that the house with air conditioning less than 80% of normal room negative ions, which can not only cause depression, dizziness, memory loss and other discomfort, but also make people resistance decreased.