| 摘要 |
The invention concerns a drip irrigation emitter for mounting on a liquid supply conduit perforated with a suitable orifice. The emitter is of the type comprising a body (1) with an inside cavity and an elastic membrane (2) dividing the body inside chamber into two compartments, one an upstream compartment (5) and the other a downstream compartment (7) with intake and discharge apertures (6) and (8), respectively. The emitter of the invention is characterized in that the downstream compartment (7) is bounded by a converging, in particular a frustrom-of-cone wall (9) comprising at least one flow channel (10) extended at the membrane by a duct (11) issuing into the upstream compartment (5). Regulation is achieved by covering a variable length of the channel (10). |
