（1）容易产生堵塞：由于滴头的流道断面小，出水孔小，很容易被水中的有机、无机杂质堵塞，这种堵塞叫物理堵塞；如果水中的阳离子，如钙、镁等含量高，容易在流道中结晶，堵塞滴头，这种堵塞叫化学堵塞；此外，滴头流道中有时会滋生绿苔，堵塞滴头，这种堵塞叫生物堵塞。采用过滤器可防止物理堵塞；采用酸洗的办法可以预防化学堵塞；采用注氯气的办法可以预防生物堵塞。 (1) easy to produce jam: due to the flow channel section of small drops of head, drainage holes is small, it is easy to the organic and inorganic impurities in the water blocking, this block is called physical plugging; If the water in the water, such as calcium and magnesium, is high, it is easy to crystallize in the runner's path and block the tip, which is called chemical clogging. In addition, the drips sometimes breed green moss and block the droplets, which are called biological blockages. Use filters to prevent physical blockages; Acid washing can prevent chemical clogging. The use of chlorine gas to prevent biological blockages. 　　（2）管理要求高。 (2) management requirements are high.