肖建忠,许飞云

摘 要:空气源热泵热水器利用热泵吸收空气热源制取热水,节能效率是电热水器的4倍以上,是目前世界上最为先进的节能环保热水系统之一。详细阐述一款以ATmega16单片机为核心,具有联网通讯功能的热泵热水机组控制器软硬件系统的设计,介绍了多路温度采集模块、开关量采集模块、驱动控制模块、RS 485通信模块和液晶接口模块的硬件电路和工作原理。控制器软件适用于双压缩机系统,能有效缩短加热时间;具有压缩机、传感器等设备或元件的故障保护;具有冬季防冻和化霜功能,能够提高低温制热效率;独有的联网通信功能可以方便地实现远程控制与机组信息显示。

关键词:热泵热水机组;控制器;ATmega16单片机;控制策略

中图分类号:TP27文献标识码:A

文章编号:1004-373X(2009)19-168-05

Design of Commercial Heat Pump Water Heater Controller

XIAO Jianzhong,XU Feiyun

(Southeast University,Nanjing,211189,China)

Abstract:Air source heat pump water heater absorbs heat from the air to generate hot water using heat pump,and the energy efficient is 4 times more than electric water heater,which makes it become the world's most advanced energy saving and environmental protection water systems.The hardware system design of commercial heat pump water heater controller based on ATmega16 with the function of networking communication is described in detail,which comprises of several modules including the multi-channel temperature acquisition module,the multi-channel switching signal acquisition module,the driving module,the RS 485 communication module and LCD interface module.The controller's software is applied to dual-compressor system,which can effectively shorten the heating time;providing failure protection for compressors,sensors and other equipment or component;combined with the functions of winter antifreeze and defrost,which can improve the thermal efficiency;using networking communication to implement remote control and display information.

Keywords:heat pump water heater system;controller;ATmega16;control strategy

0 引 言

气源热泵热水器利用的是清洁的电能和空气能(太阳能),与传统热水器相比,具有节能、安全、环保三大特点;缺点是使用范围有限,设备造价相对高一些,而且还要考虑备用热源的问题。因此主要应用于商业领域,尤其是在酒店宾馆、医院、学校、休闲场所等商用公用事业方面应用广泛[1]。

控制系统是整个热泵热水系统的指挥中心,现有的热泵热水控制器加热时间长,故障保护不完善,低温条件制热效率低,不能进行联网通信实现远程控制等方面的不足影响了热泵热水器在更大范围的推广使用。本文研究工作是以单片机ATmega16为核心构建热泵机组控制器,针对双压机双盘管的双系统,力求缩短加热时间,并设计出针对压缩机故障、传感器故障的保护功能,针对低温环境的冬季防冻和化霜功能,用于挂接线控面板实现远程控制的联网通信功能。……