用于滴灌系统，防止堵塞和虹吸。
专利摘要
一种滴灌滴头，包括壳体，该壳体包含用于从供应管接收水的入口和用于以无压滴速排放水的出口。滴头内部的迷宫从供应管通过入口接收水，降低其压力并以滴速排放水。壳体内的柔性压力补偿膜片在从供应管进入入口的水的压力变化下弹性弯曲。位于入口和膜片之间的凸起结构化表面防止当供应管中的水压关闭时膜片密封通过入口进入滴头壳体的水。凸起结构化表面被配置为允许土壤中包含的空气以非常慢的速率反向通过滴头被吸入，从而抑制由土壤吸入引起的滴头堵塞。
Original abstractA drip irrigation emitter includes a housing containing an inlet opening for receiving water from a supply tube and an outlet opening for emitting water at a pressureless drip rate. A labyrinth inside the emitter receives water from the supply tube through the inlet opening, reducing its pressure and emitting the water at a drip rate. A flexible pressure-compensating diaphragm inside the housing flexes elastically under pressure changes of water entering in the opening from the supply tube. A raised structured surface positioned between the inlet opening and the diaphragm prevents the diaphragm from sealing off water entry to the emitter housing through the inlet opening when water pressure in the supply tube is shut off. The raised structured surface is configured to allow air contained in the soil to be drawn backwards through the emitter at a very slow rate, thereby inhibiting emitter blockage caused by soil ingestion.
专利附图（6）
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