旅客对旅行舒适性的要求是随着技术的不断进步而提高的。在蒸汽牵引时代,旅客靠座位下的散热器通过蒸汽机车送来的蒸汽取暖;采用内燃牵引以后,仍利用机车上的专门取暖锅炉来供暖。这种取暖方式正在逐渐被陶汰。夏季则依靠车厢的通风换气口通风散热。如今现代旅客列车的舒适度已大为提高,在车厢内广泛采用了空调。为了降低城间旅客列车车内噪声以及减少行进中的空气阻力,一般都要求安装密闭双层玻璃窗,这就需要考虑 Passenger travel comfort requirements are as technology continues to improve. In the era of steam traction, travelers rely on the seat under the radiator steam steam sent by the steam heating; after the use of internal combustion traction, the locomotive is still using a special heating boiler to heat. This heating method is gradually being eliminated. Summer relies on the ventilation of the car ventilation ventilation. Nowadays the comfort of modern passenger trains has been greatly improved and air conditioning is widely adopted in the passenger compartment. In order to reduce the noise inside the passenger train in the city and reduce the air resistance during traveling, it is generally required to install airtight double-glazed windows, which needs to be considered