Central air-conditioning energy-saving control system

The invention relates to a central air-conditioning energy-saving control system which is designed for solving the technical problems that existing similar products are not good in energy efficiency management and energy-saving effect, not scientific in intelligent control and data acquisition and not good in cooling mode and cooling effect of water-cooling draught fans. The energy-saving control system comprises a refrigeration station machine room, a computer and room terminals in pipeline connection with the refrigeration station machine room and the computer, wherein the refrigeration station machine room comprises refrigeration main machines, freezing pumps, cooling pumps, a water collection device, a water knockout vessel, hot water pumps and a frequency conversion control cabinet and a signal control cabinet of the system; the system is characterized in that the computer conducts analysis on data transmitted by flowmeters, differential pressure transducers and temperature sensors, dynamic throttling instruments of the freezing pumps, dynamic throttling instruments of the cooling pumps and dynamic throttling instruments of the hot water pumps and dynamic controllers of the refrigeration main machines are controlled through a frequency converter in the frequency conversion control cabinet, and water outlet of the water knockout vessel is controlled through electric regulating valves. According to the structure of the central air-conditioning energy-saving control system, original cooling towers may be replaced with water curtain frames, and lower water tanks of the water curtain frames are connected with water inlet pipes of the cooling pumps through drainage valves.