空调系统的能耗占建筑总能耗的三分之一以上，其中空调冷冻水的输送能耗在空调系统部分负荷运行时经常居高不下，造成系统运行时水泵能耗的极大浪费。为此，本文探讨在空调二级泵系统中采用变频技术实现二次水系统变流量运行以达到降低二次泵能耗的途径． The energy consumption of air-conditioning system accounts for more than one third of the total building energy consumption, of which air-conditioning chilled water transmission energy consumption is often high when the air-conditioning system is partially loaded, resulting in a great waste of energy consumption of the pump when the system is running. For this reason, this article explores the ways of using variable frequency technology to realize variable flow operation of secondary water system in order to reduce the energy consumption of secondary pump in air conditioning secondary pump system.