The air-conditioning industry has more and more strict control requirements on the use of electrical power consumption, but the energy consumption of the existing central air-conditioning system is always high. Taking full advantage of the load uncertainty of central air conditioning, this paper designs a central air conditioning system with high automatic control function by using PLC, frequency converter and other devices. In this system, the motor is equipped with frequency converter to realize speed control, and variable air volume control and variable flow control are adopted for different loads to reduce invalid energy consumption. The software control flow and configuration monitoring interface are designed, so as to realize the variable frequency operation control of central air conditioning and finally realize the purpose of variable frequency energy saving.

Li Mingxi, Zhang Qingsi, Li Fuyun, Li Qi. Design Method of Intelligent Control of Central Air Conditioning through PLC. International Journal of Frontiers in Engineering Technology (2023), Vol. 5, Issue 9: 53-57. https://doi.org/10.25236/IJFET.2023.050910.

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