The main circuit is controlled by AC contactor, and the machine is equipped with far infrared heating tube. Now the temperature indicator controller is used. The temperature controller has a probe installed in the oven for temperature sensing, and the temperature controller has an output point of the control circuit. The principle of using it to control the action coil of AC contactor is to start the AC contactor to electrify the far infrared heating tube, thus increasing the temperature in the furnace. The temperature controller sets the temperature value in the furnace. When the temperature rises to the set temperature, the sensing probe returns data to make the relay in the thermostat act and disconnect the power supply of the contactor coil, which means that the AC contactor stops working and disconnects the power supply. When the temperature in the furnace drops, the sensing probe restores the initial data to stop the relay of the thermostat, connect the coil of the AC contactor and the main circuit, and restore the power supply of the heating pipe.

This is the whole process of temperature control. You got it? You can add me QQ7374 19788 if you don't understand.

That's what I used to do! !