System and method for controlling water discharge

Abstract

The invention discloses a system and a method for controlling water discharge. The method for controlling water discharge comprises the following steps of: starting a water discharge control system; collecting a water discharge value inside a by-pass pipe in a secondary pump chilled water system of a central air conditioner, and a near-end pressure differential value and a far-end pressure differential value of a use side in the secondary pump chilled water system of the central air conditioner; determining the maximal near-end pressure differential set value of the user side; determining the near-end pressure differential set value of the user side; comparing the collected near-end pressure differential value with the determined near-end pressure differential set value, and adjusting operating parameters of the secondary pump on the basis of a comparison result, and finishing the adjusting process of the secondary pump. The operating parameters of the secondary pump can be adjusted by virtue of the system and the method for controlling water discharge, so that the water discharge in a water supply pipe of the user side in the chilled water system of the central air conditioner is adjusted; and the condition that the water discharge inside a water return pipe of the user side is not greater than that in the water supply pipe of a host side is ensured, and reverse backflow in the by-pass pipe is prevented finally. 本发明公开了一种水流量控制系统及方法，所述水流量控制方法包括执行以下步骤：启动所述水流量控制系统；采集中央空调二次泵冷冻水系统中旁通管内的水流量值以及中央空调二次泵冷冻水系统中用户侧的近端压差值和远端压差值；确定用户侧的最大近端压差设定值；确定用户侧的近端压差设定值；比较采集的近端压差值与确定的近端压差设定值，并基于比较结果调整二次泵的运行参数；二次泵的调整过程结束。通过该水流量控制系统及方法可以调整二次泵的运行参数，从而调节中央空调冷冻水系统中用户侧供水管中的水流量，确保用户侧回水管中的水流量不大于主机侧供水管中的水流量，最终防止旁通管中逆向回流的发生。