Practical analysis of PID control and switching control in constant value temperature control system

The purpose of constant value temperature control system is to make the temperature of the controlled object constant at a certain value, for the specific temperature control system, there are many control methods can achieve good control effect, control methods are not the same. Based on PID control and switching control, this paper describes its control principle and method, the selection of supporting relays, applicable occasions and other specific use cases, and provides ideas, choices and references for personnel who are about to do constant value temperature control systems