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1、快热式家用电热水器的设计2摘要随着生活节奏的加快，快热式电热水器省时的特性越来越被生活忙碌的人群所认可。随着用电环境的改善，不少新建楼房都可以安装即快热式电热水器，这催生了即热式电热水器的快速增长。本设计的快热式电热水器系统以单片机为核心，辅以键盘，显示电路，利用热敏电阻对热水器出口温度进行检测，将温度转换成频率，并将其反馈到单片机，用单片机测出频率大小，从而间接测出温度值，温度/频率转换电路简单可靠，成本低廉。对于加热功率的控制，本文采用了双向可控硅控制，单片机通过光耦给可控硅触发信号，控制可控硅的导通角，从
2、而控制电热丝的有效加热功率。为了在关机和超温保护的状态下能可靠地关断加热电源，电路中加入了继电器来控制加热电源。其中串联在继电器线圈回路的熔丝为105℃时，热保险丝会熔断，防止加热管干烧。与电热丝并联的LED发光管用来指示电热丝的工作状态。快热式电热水器它体积小，重量轻，要使用热水时，即开即热，无须等待，省去了加热多余的热水，因此它具有省时、省电、省水的优点。正是基于以上原因，快热式电热水器在今后有着极为广阔的发展前景。关键字：单片机温度双向可控硅继电器AbstractWiththepaceoflifespee
3、dsup,Quickhot-waterheaterinthebusylivesofmoreandmorerecognizedbythecrowd.Withelectricitytheimprovementoftheenvironment,manynewbuildingsthatcanbeinstalledfasterheat-typeheaters,whichhastenedthebirthofhot-waterheaterthatistherapidgrowth.Thedesignofthefastheato
4、fthewaterheatersystemtoSCMastheSupplementedbykeyboardsupplementedbythekeyboard,displaycircuit,theuseofthermalresistanceofthewaterheatertemperaturedetectionexports,thetemperaturewillbeconvertedtofrequency,andfeedbacktothemicrocontroller,withSCMsizemeasuredfre
5、quency,thusindirectlymeasuredtemperatureandtemperature/frequencyconversioncircuitissimpleandreliable,lowcost.Theheatingpowerofcontrol,thepaperadoptedatwo-waySCRcontrol,SCMthroughOptocouplerSCRtriggersignaltothecontroloftheSCRon-angleandthuscontroltheeffectiv
6、eelectricwireheatingpower.Inordertoshutdownandover-temperatureprotectionofthestatecanbereliablyheatedpowershutdown,joinedthecircuitintherelaytocontroltheheatingpower.Oneseriesintherelaycoilcircuitforthefuse105℃,thefusewillbehotlinkstopreventtheheatingofGansh
7、ao.ParallelwiththeelectricwireLEDLEDelectricwireusedtoindicatetheworkofstate.Quickhot-waterheateritssmallsize,lightweight,tousethehotwater,-theheat,donothavetowaitandsavetheextrahotwaterheating,soithasatime-saving,energysaving,theprovincialwateradvantages.It
8、ispreciselybecauseofthesereasons,fasterheat-typeheatersinthefuturehasaverybroadprospectsfordevelopment.Keyword:MCUtemperatureSCRtwo-wayrelay目录第一篇绪论1第一章选题目的和意义1第二章国内外发展情况1第三章本设计研究的内容和所做的工作2第二篇元件选
