一、前言我局管內沈丹线上,草河口至祁家堡间、分水岭隧道是解放前留下的旧隧道,机车在隧道运行时,由于本身锅炉的热量无法向外界扩散、致使司机室內的气溫急剧上升,机车烟筒喷出的烟汽侵入司机室、又增高了室內气溫,同时也增加了室內湿度,尤其是在夏季,司机室內气溫可超过60℃相对湿度高达70％以上,乘务只处在高溫、高湿、低气流 I. Foreword In our office, there is an old tunnel in the tube between the grass and the estuary of Qijia, and the watershed tunnel is the old tunnel left before the liberation. When the locomotive runs in the tunnel, the heat inside the boiler itself can not spread to the outside, causing the driver to indoors Of the temperature rise sharply, locomotive chimney smoke smoke into the driver’s room, but also increased the indoor temperature, but also increased the indoor humidity, especially in summer, the driver indoor temperature can exceed 60 ℃ relative humidity as high as 70% or more , Crew only at high temperature, high humidity, low air flow