求翻译：列车空调的制冷系统主要由蒸发器、冷凝器、膨胀阀、压缩机等组成，各部件之间通过管道连成一个封闭的系统。其工作原理可概括为：液态制冷剂通过制冷系统回路的不断循环产生，在蒸发器内蒸发，与被冷却空气发生热量交换，吸收被冷却空气的热量后汽化成蒸气，随后压缩机将产生的蒸气从蒸发器中抽走，并压缩制冷剂，使其在高压下被排出。经压缩后的高温、高压蒸气在冷凝器内被周围的空气冷却，凝结成高压液体，利用热力膨胀阀使高压液体节流，节流后的低压、低温湿蒸气进入蒸发器，再次汽化，吸收被冷却空气的热量，如此周而复始，如图1所示。是什么意思？

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The train air conditioning refrigeration system mainly by the evaporator, the condenser, the expansion valve, the compressor and so on is composed, between various parts through pipeline Lian Cheng a seal system.Its principle of work may summarize is: The liquid state refrigerant through the refrige

Train consists of a refrigeration system evaporator, condenser, expansion valve, compressor and other components, and between the various components through a pipe into a closed system. Its principle of operation can be summarized as: the liquid refrigerant through continuous cycle refrigerating sys

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