本文详细介绍了变频恒压供水设备的优势、组成、运行原理和在小区管网中的应用。在整个系统中PLC、变频柜起到的作用。在遇到停电的情况,设备系统会通过BY PASS等手段实现停电不断水,也就是遇到停电的状况时控制系统自动切换为市政府自来水的压力来实现居民供水。并且采用专用静音变频器运用消音设计手段运行起来实现超静音环境。 This paper introduces the advantages of frequency conversion constant pressure water supply equipment, composition, operation principle and the application in residential pipe network. In the entire system PLC, frequency counter play a role. In the event of a power outage, the equipment system will achieve continuous power outages by means of BY PASS, that is to say, the control system will automatically switch to the water pressure of the municipal government when water outage is encountered to achieve water supply for residents. And the use of dedicated mute frequency converter design using silent operation to achieve ultra-quiet environment.