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背景技术:“太阳能热水器”一般安装在房屋顶部。由于它的户外热水箱与室内用水端之间存在着较长的管道距离。每次使用热水前,人们常常要把管道中的冷水排空。日久天长造成了大量的水资源浪费。基本思路:应用“伯努利方程”的原理,只靠自来水的水压,就能将“太阳能热水器”上下水管中存留的冷水返回利用。
BACKGROUND OF THE INVENTION “Solar heaters” are generally installed at the top of houses. Due to the long pipeline distance between its outdoor hot water tank and the indoor water end. Every time before using hot water, people often empty the cold water in the pipeline. Long days have caused a lot of waste of water resources. The basic idea: Applying the principle of “Bernoulli’s equation”, relying on the water pressure of the tap water, the cold water remaining in the water pipes of the “solar water heater” can be returned to use.