除霜方法很多,各有其特点。但就其除霜效果的好坏、装置的繁简、操作的难易及是否便于自动控制等综合性能来看,以热汽融霜较为理想,尤其在铁路机保车上更有其显著优越性,得到广泛应用。热汽融霜的基本流程如图1所示。图中虚线表示融霜支路。融霜过程是这样的:当 Defrosting methods are many, each with its own characteristics. However, its defrosting effect is good or bad, the device is simple and easy, the ease of operation and whether the convenience of automatic control and other comprehensive performance, the thermal vapor defrost is more ideal, especially in the railway car more significant advantages Sex, has been widely used. The basic process of thermal vapor defrost is shown in Figure 1. The dotted line in the figure shows the defrost branch. Defrosting process is this: when