More than one year has passed since refrigerant for refrigerator was changed from CFC12 to HFCl34a. Long term reliability of refrigerator in HFCl34a refrigerant system is mainly dependent on lubrication of moving parts of compressor and clogging of capillary tube. To maintain better practical reliability in components in compressor such as refrigeration lubricant,metallic materials and motor insulations were evaluated.
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