当温控开关打开时，若测得环境温度大于设定温度，则继电器吸合，启动压缩机工作；若测得环境温度小于设定温度，则继电器释放，压缩机停止工作。 该实验可以应用于对温度控制精度要求不是很高的场合，例如，粮仓,电冰箱，空调，电饭锅等。如果配以通讯接口，可以做成多点温度检测监控系统。具有极强的扩展性。-When the temperature control switch is open, if the measured temperature greater than ambient temperature, then the relay pull-in, start the compressor work　if the measured temperature is less than the ambient temperature, then relay the release of the compressor to stop working. The experiment can be used for precision temperature control is not very high, for example, granary, refrigerators, air conditioners, rice cookers and so on. If accompanied by communication interface, you can make detection of multi-point temperature monitoring system. Is highly scalable.