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工作原理 The working principle of 　温湿度控制器主要由传感器、控制器、加热器(或风扇等)三部分组成，其工作原理如下： The temperature and humidity controller consists of three parts: sensor, controller, heater (or fan, etc.). Its working principle is as follows: 　传感器检测箱内温湿度信息，并传递到控制器由控制器分析处理：当箱内的温度、湿度达到或超过预先设定的值时，控制器中的继电器触点闭合，加热器(或风扇)接通电源开始工作，对箱内进行加热或鼓风等;一段时间后，箱内温度或湿度远离设定值，控制器中的继电器触点断开，加热或鼓风停止。除基本功能外不同型号还带有断线报警输出、变送输出、通信、强制加热鼓风等辅助功能。 Sensors in the temperature and humidity information, and passed to the controller by the controller analysis: when the temperature and humidity box reaches or exceeds preset value, the controller of the relay contact closure, heater (or fan) began to work, power supply is connected to the heated in the oven or blast, etc. After a period of time, the temperature or humidity in the box is far away from the set value. The relay contacts in the controller are disconnected, and the heating or blast of the air stops. In addition to the basic functions, different models also have the auxiliary functions such as the broken line alarm output, the transmission output, the communication, and the forced heating of the air blast.