太阳能热水器监控仪的设计1

太阳能热水器监控仪的设计1

太阳能热水器监控仪的设计1

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太阳能热水器监控仪的设计1

 太阳能热水器监控仪的设计1                               摘要:太阳能热水器由于具有绿色环保特色而在人民生活和生产中得到了很多应用,其监控仪表的开发研制是许多企业作为产品配套的一项重要工作。本文介绍一款用通用器件制造的实用太阳能热水器监控仪表,它能完成自动上水、4段水位控制和显示、水温测量和显示的全部功能。监控仪由传感器和仪表两部分组成。
关 键 词:太阳能热水器 监控仪 传感器 电路原理

1.引言
   太阳能热水器是一种利用太阳辐射能通过温室效应把水加热的装置。温室效应是指由于对流、反射损失减少使能量聚积、温度逐渐升高的一种自然现象。温室效应又称为热箱原理,它是通过一个上面盖 有透明玻璃的封闭箱体来实现能量聚积的。太阳光 透过玻璃进入箱体内,被黑色表面吸收,而向外反 射和时流的能量受到玻璃和箱体的队档,被保留在 箱内,这样箱体内的能量不断聚积,温度不断升高 ,甚至可达1000C- -2000C。利用聚积的高温来加 热水,便成为太阳能热水器。由于太阳能热水器在运 行中不消耗任何常规能源(煤、电、气等),所以有 人把它形象地称为“不烧煤的锅炉”。太阳能热水器不仅可以为家庭提供低温用热水(40 -C- 60-C),还可以为暖房、温室、干燥、蒸馏、制冷等 热动力系统和工农业生产提供较高温度的热水。但使用时常常将水放溢,所以设计一套与之配套的监控仪是重要的,许多企业也将其作为一项重要的工作进行研究。
虽然设计过程很粗略化,但是我觉得学到的东西很多,自己的能力也相应地得到了提高;毕竟由于自己的能力有所限制,设计难免有所纰漏,恳请指正!

2、方案论证
2.1  方案一  以单片机为核心,对储水箱水位、水温等进行检测和显示;水位过低时进行自动上水、水满自停,防止溢水;在无光照阴雨天或寒冷季节进行辅助电加热,且温度可由用户预置;在寒冷的冬季能对上水管道的水进行排空,防止管道冻裂;具有防漏电、防干烧等多种安全保护和声光报警功能。
2.1.1、系统结构
  太阳能热水器辅助控制系统结构如图1所示。在真空管太阳能热水器的保温储水箱内增加一个与电热水器类似的电热元件并固定在绝缘底座上,引出交流电源线入户,由辅助控制系统的继电器控制通断电。水位、水温探测器从保温储水箱顶部安装在水箱中,通过电缆线接入用户室内控制器。进行管道排空睁,由控制系统关闭排空控制阀,打开热水开关和淋浴开关,将管道中的水放掉;用水时则打开排空控制阀。系统自动上水时,通过单向电磁阀上水;不用该系统控制时,通过打开冷水开关和热水开关上水。水流电开关用于检测淋浴开关是否打开、是否有水的流动,当淋浴开关打开用水时,系统自动停止上水、切断辅助电加热器的电源。
  毕业设计说明书目录

1、引言····························································18
2、方案论证························································18
2.1 方案一·························································18
2.2 方案二························································19
3、各电路设计和论证················································20
3.1 传感器电路设计与论证··········································20
3.1.1 方案一·······················································20
3.1.2 方案二······················································21
3.2水位显示电路的设计与论证·······································24
3.3 A/D转换电路设计与论证··········································25
3.3.1方案一························································25
3.3.2 方案二·······················································27
3.4 显示电路设计与论证·············································35
3.4.1方案一························································35
3.4.2 方案二·······················································38
3.5 自动上水电路设计和论证·········································39
3.5.1 方案一·······················································39
3.5.2 方案二·······················································40
3.6 手动上水电路设计和论证········································41
3.6.1 方案一······················································41
3.6.2 方案二·······················································41
3.7 电源电路设计和论证·············································41
3.7.1电源系统的组成·················································41

3.7.2电源电路设计方案··············································42

3.7.3  +5V直流稳压电路设计·········································42
4、硬件系统的调试·················································45
5、附录·····························································45
6、参考文献························································46参考文献
1余永权.ATMEL89系列 Flash单片机原理及应用.北京:电  子工业出版社 ,1997
2李 华.MCS-51系列单片机实用接口技术.北京:北京航空航天大学出版社,1993
3王福瑞.单片微机测控系统设计大全.北京:北京航空航天大学出版社 ,1999
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5蔡可健.热水器节能控制系统设计[J].电气自动化,2006,28(5):60一62.
6蔡可健.节能热水器智能电路设计方案[J].智能仪器仪表,2004,9:9—50.
7何为民.低功耗单片微机系统设计[M].北京:北京航空航天大学出版社,1994.
8 se“conductor公司Dsl820技术资料[z].
9薛燕红.基于89c51+D618820的智能温控器的研制[J].微计算机信息,2007,03S:198—199.
10何希才.新型集成电路及其应用实例[M].北京:科学出版社,2003.
11付植桐.电子技术[M].北京;高等教育出版社,2004.
12陈尔绍.电子控制电路实例[M].北京:电子工业出版社,2004.


  • 关键词 太阳能 热水器 监控 1
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