该文件规定了在符合EN 378 1标准的A3组制冷剂的家用冰箱和冷冻箱的情况下对可燃制冷剂进行风险评估的方案，考虑到密封系统和不大于150g。密封系统是通过焊接，钎焊或类似的永久连接将所有制冷剂容纳部件制成紧密的制冷系统。 注意对于风险评估，选择具有流程图的方法，因为这些有助于检查整个设备的可能点火并估计点火概率。考虑到EN ISO 12100，EN 1050，EN 1127，EN 60335 2 24/A53，E DIN 7003。 至少爆燃概率是不同成分的缺陷概率乘以和爆炸性气氛的存在概率以及点火源概率的乘积

The document gives a scheme for carrying out a risk assessment for flammable refrigerants in case of house-hold refrigerators and freezers with refrigerants of group A3 according to EN 378 1, taking into consideration a sealed system and a refrigerant charge of not more than 150 g. Sealed systems are refrigerating systems in which all refrigerant containing parts are made tight by welding, brazing or similar permanent connection. NOTE For risk assessment the method with flow diagrams is selected, because these are helpful for checking the possible ignition of the whole appliances and to estimate the probability of ignition. It takes EN ISO 12100, EN 1050, EN 1127, EN 60335 2 24/A53, E DIN 7003 into consideration. At least the probability of deflagration is the product of multiplication of the probability of defects of different components and the probability for the presence of explosive atmosphere and the probability for the ignition sources.