The utility model belongs to the technical field of centralized cooling of air conditioners, and provides a centralized cooling
system which comprises a cooling water circulating pipeline, a
chilled water circulating pipeline, a
cooling tower set connected into the cooling water circulating pipeline, a cooling pump set, a chilled pump set connected into the
chilled water circulating pipeline and a
pressure difference adjusting pipeline. The refrigerating
machine group is connected into the cooling water circulating pipeline and the
chilled water circulating pipeline at the same time; two ends of the
pressure difference adjusting pipeline are respectively communicated with the water inlet end and the water outlet end of the chilled water circulating pipeline; and the chilled water circulating pipeline is provided with a water quantity regulation and control
assembly. The centralized cooling
system provided by the utility model can monitor and adjust the circulating operation states of cooling water and chilled water in the circulating pipeline in real time in the cooling process so as to improve the
cooling efficiency and the
utilization rate of energy, so that the energy-saving effect is enhanced, and meanwhile, the
pressure difference between the
water supply and the water return can be effectively controlled, so that the cooling response of the
system is rapid and efficient; and the stability and reliability of system cooling are improved.