为了保证旅客旅行时的舒适性,冬季在寒冷地区运行的客车客室内都必须保持一定的温度。影响客室内温度的因素很多,如采暖设备的发热量,车体隔热壁的隔热性能,客室内换气量的大小,其他热源的产热能力;门、窗缝隙及开闭车门时冷空气的影响等。具体到每一项中又有若干因素起作用。例如采暖 In order to ensure the comfort of passengers when traveling, passenger cabs operating in cold areas in winter must maintain a certain temperature. Affect the temperature inside the room many factors, such as the heat of heating equipment, body insulation wall insulation, passenger room ventilation capacity, heat capacity of other heat sources; doors and windows gap and opening and closing the door cold The impact of air and so on. There are several factors specific to each one. For example, heating