PLC变频器在溴化锂制冷机组中的应用

The application of the PLC transducer in the lithium bromide refrigeration unit

简述了交换站溴化锂制冷机组工艺中自动控制系统的应用。详细介绍了溴化锂制冷机组的工作原理、结构构成及容器内溶液循环的工作方式。依据溴化锂制冷机组的运行模式,对自控系统进行设计改造。详细描述了自动控制要实现的内容及功能,系统通过PLC(可编程控制器)变频器等设备来完成控制逻辑、变频调速、信号采样等功能,实现自动控制;同时,又实现了上位机对现场数据的采集与网上发布,实现远程监控。

The thesis briefly introduces the automatic control system＇s application in the exchange station lithium bromide refrigeration unit craft. It detailedly introduces the working principle of the lithium bromide refrigeration units, structure and the working style of the solution cycle in the container. Based on the run mode of the lithium bromide refrigeration unit, the design of automatic control system has modified. Describing the content and function which the automatic control system will to be achieved and the system accomplish logic control, frequency conversion and speed governing, signal sampling and other functions by the PLC transducer and other equipments. At the same time, It can realize the PC on-site data collection and on-line publication and remote monitoring.