| 摘要 |
The drip nozzles (1) of the system for drip irrigation of plants comprise a nozzle member (2) with a feeding channel (11, 12, 13) and an outlet channel (15, 17, 18, 26). The outlet (14) of the feeding channel and the inlet (16) of the outlet channel in the nozzle member (2) are covered by a resilient membrane (3). In connection with a low water pressure, the latter membrane closes both the outlet and the inlet (14, 16), and in connection with a high water pressure it opens the passage between the outlet and the inlet. The drip nozzle according to the invention prevents air from entering said nozzle to a substantial degree, and accordingly prevents deposits of calcium and ferric oxide from blocking up the interior of the nozzle in such a manner that the functioning period of the nozzle is very long. |
