Concentrated cooling system

The invention provides a centralized cold supply system, and relates to the technical field of refrigeration. The centralized cold supply system comprises a refrigerating device used for manufacturing cold air; the refrigerating device conveys cold air to the working place through the first conveying pipeline; the refrigerating device conveys cold air to the equipment room through the second conveying pipeline; the oxygen production device is used for producing oxygen and conveying the oxygen to the first conveying pipeline; the flow regulating valve is used for regulating the flow of oxygen fed into the first conveying pipeline by the oxygen generating device; the monitoring device is used for detecting the number of personnel in the workplace and sending a personnel number value; and the control device is used for controlling the opening or closing of the oxygen production device and controlling the opening degree of the flow regulating valve according to the personnel quantity value from the monitoring dev