故障现象:一辆 BJ2021型汽车,行驶约20万公里时,空调通风口出风量变小、制冷量不足。 故障检查:首先检查冷凝器、压缩机传动皮带、暖风热水阀及车厢的密封情况,均未发现问题;通过多用贮液罐上视液镜检查系统内制冷剂也不缺;又考虑是否风机叶轮打滑,拆下检查其性能亦正常。最后,在清洁鼓风机和蒸发器内壳时,发现蒸发器翅片几乎被泥 Symptoms: a BJ2021 car, traveling about 20 million km, the air conditioning vent smaller, less cooling capacity. Fault Check: First check the condenser, compressor drive belt, hot air valve and the compartment sealing, did not find the problem; through the liquid tank on the multi-use liquid crystal inspection system, the refrigerant is not lacking; also consider whether Fan impeller skid, remove the check its performance is also normal. Finally, when cleaning the blower and evaporator inner shell, the evaporator fin was found to be almost mud