| 摘要 |
The irrigation device comprises a receptacle (5) supplied with water. A float (6) with a siphon (12) is located above outlet (13), one branch pipe (11) of said siphon extending through a portion (10) in the bottom of the float. The pipe (11) carries at its lower open end a valve (7) which may close tightly against a surface (8) in the bottom of the receptacle (5). A closing pipe (9) projects from the surface (8) about the pipe (11) and forms together with the bottom portion (10) of the float a siphon connection between the receptacle (5) and the outlet (13). Within the receptacle (5) the water raises the float until the valve (7) closes against the surface (8), and the water rises beyond the top rim of the float until the water within the float has reached a level (C-C) at which the weight of the water with the float surmounts the buoyancy in the receptacle (5). The connection to the outlet (13) is thus opened, and the water is quickly sucked out through the siphon connection at the underside of the float and produces a sucking effect within the siphon (12) so that the float (6) is emptied. Clogging deriving from deposits and a slow leaking out of water through the siphon are avoided due to the quick irrigation and to the fact that stagnant water is never present at the elbow of the siphon. <IMAGE> |
