一、前言众所周知,为了防止室内空气的污染(由人体呼吸引起的二氧化碳含量的增加、氧气量的减少;温、湿度值偏差引起的不舒适感;尘埃的增加以及臭气等等),须送入新鲜、洁净的外气进行换气。对室内空气的处理,称之为换气或通风。它不仅仅限于铁道车辆,即使是普通家庭也在考虑这一问题。为了保持室内空气的清洁,对于铁道车辆的换气,只向室内供给大量的清洁外气是不够的,还应从几个方面考虑: First, the preamble As we all know, in order to prevent indoor air pollution (caused by the human body to breathe carbon dioxide levels increased, reduced oxygen; temperature and humidity bias caused by the discomfort; increased dust and odor, etc.), to be sent Into fresh, clean air for ventilation. The treatment of indoor air, called ventilation or ventilation. It is not limited to rail vehicles, even ordinary families are also considering this issue. In order to keep the indoor air clean, it is not enough for the ventilation of railway vehicles to supply only a large amount of clean air to the interior, and several aspects should also be considered: