目前,国内生产的循环式太阳能热水器,热效率高,热性能好,应用发展较快。但是,由于这种热水器的构造比较复杂,生产成本和销售价格都比较高,这对于水温要求不高,用水量也不很大的一般家庭来说,经济上负担有些偏高。虽然闷晒式太阳能热水器热效率稍低,但制作简单、造价低廉、集热和蓄热一体化, At present, the domestic production of circular solar water heaters, thermal efficiency, thermal performance, application of rapid development. However, due to the complicated structure of the water heater, the production cost and the selling price are relatively high, which is economically unfavorable to the average family who require less water and consume less water. Although the stuffy sun-type solar water heater slightly lower thermal efficiency, but the production is simple, low cost, heat and heat storage integration,