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1、制冷与制冷设备技术 情景模拟呈现生活生产实际 基础知识以必需够用为原则 操作分析有的放矢地学与做 阅读探研学生为主教师为辅金国砥 主编电 子 工 业 出 版 社 （第4版）制冷与制冷设备技术 (第五版) 全国中等职业学校电子信息类教材 实用电子技术专业 金国砥制作电 子 工 业 出 版 社Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.
2、0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.模块八 制冷设备常见故障分析与处理【学习目标】熟悉电冰箱、空调器常见故障现象，会对电冰箱、空调器常 见故障进行分析与快速处理给以帮助等。 8.1 故障分析的基本方法电冰箱、空调器常见故障分析方法基本相同，即“一看、二听、三 摸、四测”，最后根据综合分析后选用合适的方法给予修复。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profil
3、e 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.电冰箱、空调器修理后的检测项目主要有安全性 能、制冷性能和启动性能等几项。现以电冰箱为例，其修 理后具体检测的内容如下：1、安全性能检查 （1）绝缘电阻，要求不小于2M； （2）检查接地电阻，要求不大于0.1； （3）检查泄漏电流, 要求不大于1.5mA； （4）进行耐压试验，用交流电压1500V历时1min不
4、出现 闪络、击穿现象。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.2、制冷性能检查 （1）电冰箱开机510min左右，摸冷凝器温度应比环境 温度高1015，上下有明显温差，干燥过滤器
5、微热； （2）开机30 min左右，蒸发器表面有均匀而薄霜； （3）开机23h不发生冰、脏堵； （4）电冰箱内温度能够达到设定标准，压缩机开、停机 正常。 3、启动性能 在电压187242V内正常启动、停止。温度控制继电器能 正常压缩机开、停。4、振动小、噪音低，即符合国家标准要求。5、门封及箱体隔热性能良好等。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client
6、 Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.8.2 电冰箱常见故障及维修实例1、电冰箱常见的假性故障（1）正常发热Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-20
7、11 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.（2）正常声响Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.（3）表面凝露Eva
8、luation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.（4）启动次数较多Evaluation only.Evaluation only. Created with Aspose.Slides for
9、.NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.2、电冰箱的维修实例（1）新购置电冰箱在使用时，压缩机长时间运转，不停止工 作。（2）用水洗刷电冰箱内胆，擦干后使用，压缩机运转了一 下就不工作。（3）电冰箱运转正常，但开门时照明灯不亮或关门时灯不熄 。 （4）直冷式双门电冰箱，突然长停不启动，拧动温度控制继 电器的
10、旋钮到任何位置，均不起作用。（5）某台BC-155型直冷式双门电冰箱，经3年正常使用后突 然不能制冷。通电运行时，电流正常，但冷凝器不热，箱内 气流声甚微，箱温降不下来。（6）电冰箱充注制冷剂时，压缩机内有气流声通过，但好 长时间蒸发器仍不结霜，冷凝器也不发热。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright
11、 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.电冰箱故障检修示图（1）通电后压缩电动机不启动但有嗡嗡声Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2
12、011 Aspose Pty Ltd.（2）电冰箱不制冷Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.（3）电冰箱噪音大Evaluation only.Evaluation only.
13、Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.（4）压缩机运行时间过长而停机时间过短Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Prof
14、ile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.8.3 空调器常见故障及维修实例空调器常见的假性故障（1）空调器不工作（2）空调器制冷或制热效果差Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created w
15、ith Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.（3）空调器制冷时室温低（4）空调器噪音大Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2
16、.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.（5）空调器开停频繁（6）空调器漏水Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.4、 空调器的维修实例（1）一台KC-20型窗式空调器工作一直正常，突然压缩 机不运转，后来就起动不了。（2）一台KC-20型窗式空调器经常停机，且室内温度降 不下来。（3）一台分体挂壁式空调器安装后不制冷。（4）一台冷风型分体式空调器使用3年一直正常，到4
