。娄庆宇-某轮空调装置蒸发器结霜原因分析及故障排除改.docVIP

大连海事大学 毕 业 论 文 二O 一一 年 六 月 某轮空调装置蒸发器结霜原因分析及故障排除 专业班级： 船舶与海洋工程 姓 名： 娄庆宇 指导教师： 吴海春 轮机工程学院 内容摘要 文章针对某轮空调装置蒸发器结霜的故障现象，结合该轮制冷系统特点和温度控制原理，分析了不同故障产生的原因，通过对可能的这几种原因，膨胀阀出口管路结霜的原因是膨胀阀损坏后开度过小导致制冷剂供液不足，蒸发压力（蒸发温度）过低而结霜；在没更换膨胀阀前，膨胀阀出口管路结霜，属于供液不足所致。压缩机因使用时间较长，能量调节机构已损坏，在吸气压力低于压力开关动作值时不能进行减缸运行；蒸发器性能下降；外界气温降低。找出了相应的排除方法，关小压缩机吸气截止阀进行节流，调节压缩机的吸气量，虽然这种办法不经济，但比较方便实用；关闭回风口，采用全新风的方法，以增加蒸发器的热负荷。希望对今后船舶空调装置的运行管理能有一定的借鉴作用。 关键词：船舶空调；蒸发器；结霜；故障排除 Abstract The article in view of some turn air conditioning system evaporator rime breakdown phenomenon, the knot shoulds to turn the refrigeration system characteristic and the temperature control principle, has analyzed the reason which the different breakdown produces, through to the possible these kind of reasons, after the expansion valve to export the pipeline rime the reason is the expansion valve damage the opening excessively is small causes the refrigerant to supply the fluid to be insufficient, but evaporation pressure (vaporization temperature) low rime; In has not replaced in front of the expansion valve, the expansion valve exports the pipeline rime, belongs for the fluid insufficient result.Because the compressor the period of revolution is long, the energy control element has damaged, is lower than the pressure switch movement value when the inspiration pressure cannot carry on reduces the cylinder movement; The evaporator performance drops; The outside temperature reduces.Has discovered the corresponding elimination method, turns off the small compressor inspiration cut-off valve to carry on the throttle, adjusts the compressor the suction intensity, although this means are uneconomical, but quite convenient practical; Closes the gusty area, uses entire new atmosphere the method, increases the evaporator the heat load.Hoped will be able to have certain model function to the next ships air conditioning system movement management. Key words: