本文通过材质、裂纹特征和氨介质特性分析,结合设备的使用及操作情况,分析了小型氨制冷系统中集油包爆炸的原因。分析结果表明,较大环境温差使封闭的集油包内部产生了较高的内应力,使集油包筒体产生塑性变形,造成集油包开裂。 In this paper, by analyzing the material, crack characteristics and ammonia medium characteristics, combined with the use of equipment and operating conditions, the reasons for the explosion of oil-in-oil package in a small ammonia refrigeration system are analyzed. The analysis results show that the larger ambient temperature difference causes a higher internal stress in the closed oil collecting bag, which causes the plastic deformation of the oil collecting bag body, resulting in cracking of the oil collecting bag.