| 摘要 |
PROBLEM TO BE SOLVED: To provide a cultivation unit which sufficiently discharges nutritious liquid in each time of drainage, in periodically discharging nutritious liquid in a nutritious liquid container.SOLUTION: A cultivation unit comprises: a tray 2 equipped with a discharge port of nutritious liquid; a partition wall 7 which partitions an internal space of the tray 2 into two regions one of which has a discharge port and the other one of which does not have a discharge port; a communication hole 7a formed in the partition wall 7; a revolving door 8 which covers the communication hole 7a; and a lift body 9 which moves between a first position abutting the revolving door 8 and a second position positioned above the revolving door 8. The revolving door 8, while the lift body 9 is at the first position, is locked by the lift body 9 and held in a posture covering the communication hole 7a, and when the lift body 9 is at the second position, the door revolves by being separated from the lift body 9 and is switched to a posture of opening the communication hole 7a. The lift body 9, out of the internal space of the tray 2, moves toward the second position while interlocking with rising of a liquid level on a side having no discharge port, and moves toward the first position at speed slower than the dropping speed of the liquid level while the liquid level drops.SELECTED DRAWING: Figure 2 |
