一现状在二十多年以前,日本铁道车辆即开始装用空气调节装置,但近年来发展特别迅速。目前在日本铁道车辆上装用空气调节装置的种类和车种如表1所示,装备车辆总数达600多辆。国外车辆上所装用的空调装置,虽然有冰冷式及蒸汽喷射式,但在日本车辆上采用的全部为机械压缩式,并且不用盐液等中间冷媒,而直接用冷却剂同客室内空气实行热交换。 A status quo More than two decades ago, Japanese rail vehicles started to be equipped with air conditioners, but the development has been particularly rapid in recent years. At present, the types and types of air conditioners installed on Japanese railway vehicles are shown in Table 1. The total number of vehicles equipped is more than 600. Air-conditioners installed on foreign vehicles are all refrigerated and steam-jet-typed, but all of the air-conditioners used in Japanese vehicles are mechanically compressed, and do not use intermediate refrigerants such as salt water, but directly heat the passenger compartment air with the coolant exchange.