摘要:21世纪是危机与发展共存的时代，能源匮乏、气候变暖、环境污染等问题无时无刻不在困扰着人们，但随着科学技术的不断突破，人们不断地打破枷锁，为人类的生存与发展做出了卓越的贡献，尤其是新能源的相关技术突破，使得新能源的利用越来越广泛，为人们的未来发展展现了一条康庄大道。随着太阳能技术的不断突破，太阳能的利用也多姿多彩起来，作为技术最成熟、利用最方便的太阳能热水器，以诸多优点受到了人们的喜爱。太阳能热水器的出现，不仅减少了资源的浪费、节约能源，也为人们的日常生活提供了便利。

    如何更加简洁方便地使用太阳能热水器，成为本文设计的出发点，结合太阳能热水器的具体利用，在传感器DS18B20、AT89C51单片机的基础上，本文介绍了太阳能热水器的工作原理和设计方案。利用AT89C51单片机设计太阳能热水器智能控制仪，不仅能够简单地显示时间与日期，更能够利用LCD液晶显示器显示预设水温与实际水温数值，简单明了，根据预设水温与实际水温的差值，单片机智能判断是否需要启动电辅助加热器件，具有调节水温的功能，当预设水温大于实际水温时，自动启动辅助加热部件，提供更适宜的温水，以使太阳能热水器使用更加方便，方便人们日常生活对热水的需求，且该智能控制仪测量精度高，反应灵敏，在水温达到要求时，便立即停止加热，相比其它的电加热器件，如热得快、电磁壶等，烧水可以减少大量能源损失。

关键词  新能源；太阳能热水器；传感器；单片机

Abstract:The 21st century witnessed the coexistence of crises and development ,which is featured by the lack of energy、climate warming, environmental pollution human being faced for a long time.

As the constant breakthrough of science and technology, we overcome the obstacles in the progress of development one by one for the sake of making great contributions to human survival and advances, especially innovations linked to techniques had paved the way for the extensive use of new energy which will open a new chapter for the future of mankind. The solar water heater, as the mature and most convenient tech-innovation, will be favored by people with its continued innovation in technology and a variety of applying.

　　　Solar water heaters not only reduce natural resource waste and save energy, but also offer convenience for people’s daily life. The usage of solar water heater with a simple and convenient way will be the starting point of this design. The paper, combined with the specific use of solar water heaters in the sensor DS18B20, AT89C51 micro-controller basis, described the working principle of solar water heaters and designing scheme. Intelligent control device of solar waters based on At89c51 MCU not only can easily display the time and date, but also can use LCD show the default water temperature and the actual temperature in a plain and simple way. By difference of water temperature and the actual temperature，SCM intelligent determined whether need to start the electric auxiliary heater parts and regulate the water temperature or not. When the water temperature was higher than the actual one, we should start automatically heating components so as to provide more comfortable hot-water and make solar water heaters more convenient and easier for our daily life. Also, the intelligent control instrument designed to be high-accuracy, and quick-witted. Still, to stop heating is necessary when the water temperature meet the requirements. Compared to other parts of electric heater, such as heater, electromagnetic pots, etc, boiling water can reduce energy losses.

Keywords   New Energy   Solar Water Heaters   Sensor   Microcontroller