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Temperature controller, as the name suggests, is a device used to regulate and control temperature, usually used in air conditioning, heating stoves, water dispensers, electric kettles, etc. Due to different uses, the structure and size also vary. It is understood that traditional temperature controllers, such as resistive temperature controllers, generally rely on the heating device to generate electricity and heat. The heating device belongs to metal products, so when heated to a certain temperature and power is cut off, there will still be a certain temperature. This leads to when the temperature controller is below the set temperature, connected to the silver contact through a curved plate, the switch is closed, and the power to the heating device is disconnected, It will still cause the heater with residual temperature to heat the heated item. Of course, due to the thermal conductivity of metals, the temperature will decrease quickly, and the actual temperature difference caused by heating items may only be a few degrees Celsius, which does not affect their use in less precise requirements.

With the development of technology and the increasing development of high-tech industries, the temperature difference of a few degrees Celsius has also begun to affect the processing problems of some precision parts. Solving the problem of temperature difference in temperature controllers is also increasingly valued by people. One solution is to use fuzzy control technology through the management of computer equipment. The idea is to calculate the heating rate of the heated object, the cooling time and heating rate of the inertia temperature of the heater, calculate the degree at which the silver contact switch is disconnected, stop the heating power supply of the heater, and finally use the inertia temperature to reach the set temperature of the heated object. This approach cannot be completely error free. In actual heating use, many situations may occur, such as temperature changes in the operating environment, air flow rate, and voltage stability, which can cause actual heating temperature deviation. It is generally believed that controlling the temperature difference within plus or minus two degrees is still acceptable and will not affect the equipment's expected specified performance.

In a temperature controller, the main function of the silver contact is to make the conductive line contact the silver contact when the temperature measuring device detects a heating device that has reached the specified temperature. The switch is connected, and the controller functions to disconnect the power supply of the heating device.