The temperature control of explosion-proof electric heaters has become an important part of industrial production and scientific research. Whether the temperature can be successfully controlled within the required range is related to the success or failure of the entire work. Due to the diversity and complexity of the controlled objects, the temperature control methods used also have diversity. Developed a temperature controller suitable for small electric heaters using PID control principle. This controller can achieve good control effects. If various parameters of PID are carefully selected, the accuracy of temperature control can reach ± 0.05 ℃.
Direct sales from manufacturers of thermal oil electric heaters
The purpose of temperature control is to stabilize the working temperature of the electric heater within a certain range with a certain degree of accuracy, which requires taking certain measures according to the actual situation of the electric heater during operation (such as the amount of heat generated, etc.) to control the heating degree of the electric heater.
In the temperature control system, the measured parameter temperature that needs to be controlled is first converted into a certain signal by the sensor, and then compared with the pre-set value. The difference signal obtained from the comparison is calculated according to a certain rule to obtain the corresponding control value, and the control quantity is sent to the control system for corresponding control. The above work is continuously carried out to achieve the purpose of automatic adjustment. When it is difficult to establish a correct mathematical model for the controlled object, a mature and widely used control method for explosion-proof electric heaters is to use the PID algorithm, which calculates the control quantity based on the proportionality, integration, and differentiation of the difference signal.
Manufacturer supplied thermal oil electric heater
The overall design concept of the system is as follows: when the system is powered on, the digital tube will display the current temperature, and then wait for the button to input the set value. After the setting is completed, the system will start the automatic temperature control process. If the current temperature is higher than the set temperature, the explosion-proof electric heater system will disconnect the optocoupler and thyristor to cool the water temperature. If the current temperature is lower than the set temperature, if it is lower than 2 degrees, the system will adopt full heating mode. If the temperature difference is less than 2 degrees, PID algorithm will be used to control heating.
The explosion-proof electric heater timer 0 will take a temperature sample every half second and compare it with the set value. The compared value will determine the on-off time of the thyristor device controlled by timer 1, thereby achieving correct temperature control.

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