太阳能热水器智能控制器的设计与实现精要.doc

太阳能热水器智能控制器的设计与实现  摘 要 本文实现了PLC（可编程控制器）在太阳能热水器自动控制系统中的应用。硬件选用OMRON公司CPM1A系列的30点可编程控制器,在软件设计上使用OMRON公司提供的CX-ONE程序进行系统控制梯形图编写。并指出了PLC设计的关键主要是能满足基本控制功能、考虑维护的方便性、系统可扩展性等。 本文设计的太阳能热水器由自动和手动两种模式组成，在自动模式中太阳能热水器能够自动上水、加热、保温，手动模式则按照用户的按键操作执行相应功能，太阳能热水器在出现故障时还具有报警功能，如温度过高会自动关闭加热器并闪烁温度警示灯，水位过高则自动关闭上水阀闪烁水位警示灯，并且绘制了系统的工艺流程图；按照设计要求合理地进行了系统的I/O分配和PLC的选型，绘制了系统的控制梯形图、控制系统电气原理图和I/O控制原理电路图等。 通过用PLC对太阳能热水器自动控制系统的改造，大大减少了系统对其它元器件的使用，使系统接线简单、检修维护方便快捷、可靠性提高，增进了系统的先进性。 关键字: PLC；太阳能；自动控制系统；热水器 Abstract Application of PLC in solar water heater automatic control system is researched in this paper. The content of this paper on the process of system hardware constitution and the system software design is emphasized . And the key of PLC design that is to satisfy the basic control function is pointed out , meanwhile maintenance convenience and system extension are also considerated. The content of this paper is divided into four parts. In the first part, the procedure of the system is established, and then the treatment flow chart is drawed out; In the second part, The address of I/O is resigned .and the suitable PLC type is choosed. The third part, the control ladder diagram is designed according to the requirement; In the end, the electrical principle diagram and the interconnection diagram are drawn. Through the design of the solar water heater automatic control system, the components that is used in the solar water heater automatic control system are decreased. The performance of the system is lifted, and it has the feature such as simply interconnection, rapid and easy fault detecting and maintenance, and high reliability. In a word, the system becomes more advanced because of my design. Keywords: PLC; Solar; Automatic control system; Water heater 目 录 绪 论 1 1 太阳能热水器的研究情况 2 1.1 国内外研究现状 2 1.1.1 国内研究现状 2 1.1.2 国外研究现状 2 1.2 本文研究的内容 3 2 全玻璃真空管式太阳能热水器的概述 4 2.1 太阳能热水器系统功能 4 2.1.1 太阳能热水器组成、原理和工作过程 4 2.1.2 太阳能热水器的硬件结构 5