During the cooking process of the electric pressure cooker, precise temperature control is the key to ensure the taste and nutrition of food, and the core of this function lies in the industrial control circuit board of the electric pressure cooker LCD.
The precise temperature control of the electric pressure cooker begins with the application of high-precision temperature sensors. Common temperature sensors such as thermistors or thermocouples are usually installed at the bottom of the electric pressure cooker or near the heating plate, which can quickly and sensitively sense the temperature changes in the pot. These sensors convert temperature signals into electrical signals and transmit them to the industrial control circuit board at a millisecond response speed. For example, when the temperature in the pot rises, the resistance of the thermistor will change with the temperature change. The circuit board receives the electrical signal corresponding to this resistance change, thereby obtaining the current temperature data and providing a basis for subsequent regulation.
The microcontroller on the industrial control circuit board is the "brain" of temperature control. After receiving the electrical signal from the temperature sensor, it will compare it with the target temperature set by the user on the electric pressure cooker LCD. Based on the preset control algorithm, the microcontroller calculates the deviation between the current temperature and the target temperature, and combines the temperature change trend to formulate an accurate regulation strategy. For example, when the temperature deviation is small, the microcontroller will use a small adjustment of the heating power to avoid temperature overshoot; if the temperature deviation is large, the heating power will be quickly increased or decreased to make the temperature close to the target value as soon as possible. This intelligent calculation and decision-making ability ensures the timeliness and accuracy of temperature control.
The heating control circuit dynamically adjusts the heating element according to the instructions of the microcontroller. The commonly used heating element of the electric pressure cooker is the heating plate, and the heating control circuit uses pulse width modulation (PWM) technology to achieve precise temperature control. PWM technology adjusts the average power of the heating plate by changing the pulse width of the electrical signal, that is, the duty cycle. When the temperature needs to be increased, the microcontroller outputs a pulse signal with a large duty cycle, which increases the continuous power-on time of the heating plate and increases the heating power; conversely, reducing the duty cycle reduces the power-on time of the heating plate and reduces the heating power. Through this high-frequency on-off adjustment, the power of the heating plate can be accurately controlled, thereby achieving the stability of the temperature in the pot.
To further improve the accuracy of temperature control, the industrial control circuit board is equipped with a feedback and calibration mechanism. During the cooking process, the temperature sensor continuously monitors the temperature and feeds the data back to the microcontroller in real time. The microcontroller dynamically corrects the heating control strategy based on the feedback information to form a closed-loop control. In addition, the circuit board also has a self-calibration function to regularly detect and calibrate the accuracy of the temperature sensor. For example, by comparing with the internal preset standard temperature value, the sensor error is corrected to ensure that it maintains high-precision temperature monitoring capabilities for a long time, thereby ensuring the stability and reliability of temperature control.
While achieving precise temperature control, the industrial control circuit board also shoulders the responsibility of safety protection. When an abnormal temperature is detected, such as exceeding the preset maximum safety temperature or a temperature sensor failure, the circuit board will immediately activate the protection mechanism. On the one hand, the power supply of the heating element is cut off to prevent safety accidents caused by excessive temperature; on the other hand, the fault code or alarm prompt is displayed through the electric pressure cooker LCD to inform the user of the current abnormal situation and ensure the safety of the use process.
The electric pressure cooker LCD industrial control circuit board achieves precise control of the temperature in the pot through real-time monitoring of high-precision temperature sensors, intelligent calculation of microcontrollers, dynamic adjustment of heating control circuits, and the coordinated operation of feedback calibration and safety protection mechanisms. The comprehensive application of these technologies not only brings users ideal cooking effects, but also ensures the safety and stability of the electric pressure cooker during use, reflecting the advancement and reliability of modern home appliance control technology.
