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在修理电冰箱过程中,在未充注制冷剂前,对制冷系统进行干燥和抽空,是一个很重要的操作过程,这关系到修理质量和使用寿命。空气是不凝性气体。在制冷系统中,空气的存在会导致冷凝压力升高,压缩机的产冷量减小、耗电量增加,能使润滑油氧化变色,阀片处积炭。在制冷系统中存在过量水分会在毛细管与蒸发器结合处发生冻堵而造成制冷循环停止。水与氟里昂-12°反应生成酸,酸的腐蚀作用造成电机绕组绝缘损坏,压缩机阀片破碎並使压缩机寿命缩短。水分的存在还能降低绝缘材料的绝缘电阻,加速润滑油的老化。
In the process of repairing the refrigerator, it is a very important operation to dry and evacuate the refrigeration system before filling the refrigerant, which is related to the quality of repair and service life. Air is non-condensable gas. In the refrigeration system, the presence of air will lead to condensation pressure increases, the compressor cooling capacity decreases, power consumption increases, enabling oxidation of oil discoloration, valve coke deposition. Excessive moisture in the refrigeration system can cause freeze-block at the junction of the capillary and the evaporator, causing the refrigeration cycle to stop. Water and freon -12 ° reaction generates acid, the acid corrosion caused by motor winding insulation damage, the compressor valve broken and shorten the life of the compressor. The presence of moisture can also reduce the insulation resistance of insulating materials, accelerate the aging of lubricating oil.