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例1 一辆奥迪100型乘用车,其空调制冷系统在使用中出现这样的情况:空调制冷系统开始工作时制冷效果良好,但工作20min后,制冷效果就明显下降;用温度计测得空调出风口的温度,开始时为9℃,但约20min后为18℃～19℃。根据故障现象,并结合笔者的实际经验,进行了以下检查。 a.观察机液窗内制冷剂的流动状况。在空调制冷系统开始工作时,有气泡流动,但片刻即消失,这表明制冷剂量合适。
Example 1 An Audi 100 passenger car, the air conditioning and refrigeration system in use in such a situation: air conditioning and refrigeration system at work began cooling effect is good, but the work of 20min, the cooling effect decreased significantly; measured with a thermometer air conditioning out The tuyere temperature, initially 9 ° C, was about 18 ° C to about 19 ° C after about 20 minutes. According to the fault phenomenon, combined with the author’s actual experience, conducted the following inspection. a. Observe the flow of refrigerant in the liquid window. When the A / C system started to work, bubbles were flowing, but disappeared in a moment, indicating that the amount of refrigerant was suitable.