Principles and Implementations of Refrigerator Control by Single-Chip Microcomputers

In modern life, refrigerators control temperature through single-chip microcomputers. The higher the price, the better the temperature stability. As a kind of microcontroller, single-chip microcomputers are divided into different types.

Conventional ones can achieve precise control of refrigerators and improve the performance and efficiency of refrigerators. Therefore, the refrigeration of refrigerators is not entirely achieved by mechanical functions.

I. What exactly is the principle of refrigerator control by single-chip microcomputers?

In professional terms, it refers to achieving monitoring and control of the temperature, humidity, refrigeration system, etc. of the refrigerator by connecting various sensors and actuators.

The specific steps are as follows:

① Users set the temperature, which serves as a reference value for the refrigerator to adjust the temperature.

② The temperature sensor monitors the temperature inside the refrigerator in real time.

③ Calculate the change between the temperature inside the refrigerator and the set value. If the temperature inside the refrigerator is higher than the set temperature, the single-chip microcomputer controls the refrigeration system to start refrigeration to lower the temperature inside the refrigerator. If the temperature is lower than the set value, the single-chip microcomputer of the refrigerator will control the refrigeration system to stop working to keep the temperature inside the refrigerator stable.

The above is the principle of refrigeration. As for defrosting and other functions, they are also controlled according to the temperature, such as increasing the temperature, controlling the rotation speed of the fan, etc.

II. The control of the refrigerator by the single-chip microcomputer can be achieved through demonstration codes (for demonstration reference only).

Explanation: This function uses a random number generator to simulate the readings of the temperature sensor. In practical applications, a real temperature sensor can be connected to the input pin of the single-chip microcomputer, and the actual temperature can be obtained by reading the output value of the sensor.

Explanation: This function controls the start and stop of the refrigeration system according to the current temperature and the set target temperature. If the current temperature is higher than the target temperature, the refrigeration system will be started. If the current temperature is lower than or equal to the target temperature, the refrigeration system will be stopped.

Explanation: This function is used to display the current temperature and the status of the refrigeration system. In practical applications, a liquid crystal display or other display devices can be used to display this information so that users can know the working status of the refrigerator at any time.

III. Summary

Through the implementation of the above codes, the single-chip microcomputer can effectively control the temperature and refrigeration system of the refrigerator and improve the performance and efficiency of the refrigerator. Of course, this is just a simple example, which can clearly let customers know the technological content of the refrigerator. It is also achieved through chips, controllers and a series of refrigeration technologies. Most commercial food refrigerators and medical freezers are controlled by single-chip microcomputers. You can think of it as being controlled by a mini-computer, and it will have a wider range of applications in real life. The higher the technological content, the better the user experience.