| 摘要 |
A tank (10) for the irrigation of plants in hydroponic cultivation, maintains intermittently and automatically the water level in the tank and simultaneously controls the filling opening without mechanical closure. The tank is comprised of elements forming an enclosing container with an annular section. It is divided in three chambers: a reserve chamber (12), an other chamber open at its upper portion forming a filling channel (14), in connection at its lower portion with the reserve chamber, and a third chamber called the full chamber (16), connected by its upper portion to the reserve chamber through an overflow-shoot and, by its lower portion, to the plant container through vertical slots (24). The width of those slots is such that they form a sealing weir due to the surface tension of the water as long as the level is under a predetermined minimum level. The reserve chamber and the container are connected through an opening (26) which, by its arrangement and size, dampens the current. |
