The utility model discloses a dual-two-stage-heatpipesolarwaterheater comprising a heat collection unit (4), a heat transfer unit and a water tank (3).
本实用新型公开了一种双二级热管式太阳能热水器，包括集热单元（4）、传热单 元以及水箱（3）。
2
In the case of constant pipe diameter, lengthening the length of vacuum tube is an effective way to increase the total heat of solarwaterheater!
在管径恒定的情况下，加长真空管的长度是增加太阳能热水器总得热量的有效途径和方向！
3
Applying cellular technology and heatpipe technology in flat plat solarwaterheater can greatly reduce heat losing and enhance average daily coefficient.