1、 I 摘要摘要 随着人民生活水平的提高，物流和国内零售行业的快速发展，大、中型食品冷藏 设施，在解决中转、生产、销售等环节的食品保鲜问题中，发挥着重要的作用；其核 心的制冷压缩机组，也已经逐渐从：单个大容量的制冷机到多台中、小容量制冷机一 起运作到现在的大型多机组并联的发展过程。多并联制冷压缩机组因为它高效节能、 安全稳定、价钱不高等优点，成为目前制冷工程优先选用的系统，被越来越多的设计 单位逐渐认可和接受;越来越多的低温配送中心， 食品加工厂， 冷冻设备和大型的冷库， 开始使用并联压缩机制冷系统来替换原来的单台压缩机制冷系统。并联压缩机系统是 让多台压缩机并联连接在一起，然后安装在同一个机架
2、上，共用一些部件，例如冷凝 器、吸排气管和储液桶等。自带的高性能中央处理器在其结构中一般是一个高性能 PLC 控制器或者是一台专用的并联机组控制器，在其控制下，测量并控制工作参数，优化 并协调系统的运行，给制冷系统的主蒸发器或冷库中的冷风机组提供制冷剂。 本设计主要是介绍多并联节能压缩机组控制系统的背景，国内当前现状以及当前 工艺流程，同时采用西门子 PLC 来设计控制流程，最后用触摸屏来监控动作过程。 关键词：关键词：多并联节能压缩机组；西门子 PLC；触摸屏 常州工学院电子信息与电气工程学院毕业设计说明书 II Abstract With the improvement of people
3、s living standards, logistics, and rapid development of the domestic retail industry, large and medium-sized food cold storage facilities, food preservation issue is resolved in transit, production, marketing and other aspects, and plays an important role; its core compression refrigeration unit, ha
4、s also been a gradual shift from: a single large-capacity refrigerator to more medium and small-capacity refrigerator work together to present the development of large-scale multi-unit parallel. More refrigeration compressor in parallel because it energy efficient, safe and stable, the price is not
5、higher merit, as the current preferred refrigeration engineering system, more and more design units gradually recognized and accepted; more and more low temperature distribution centers, food processing, refrigeration equipment and large refrigerator, start using a parallel compressor refrigeration
6、system to replace the original single compressor refrigeration system. Parallel compressor systems allow multiple compressors connected together in parallel, and then installed on the same rack, share some components, such as condensers, intake and exhaust pipe and reservoir barrels. Built-in high-performance central processing unit in the structure is typically a high-performance PLC controller or a dedicated unit controller in parallel, under its control, measurement and control of operating
