| 主权项 |
1. An external cultivation liquid siphon to bridge a plant cultivation pot and a cultivation liquid storage tank to provide reciprocal siphonage action, comprising:
a liquid delivery equipment including a liquid pumping device located in the cultivation liquid storage tank and a liquid delivery pipe to bridge the liquid pumping device and the plant cultivation pot; and an external siphon equipment which defines an upper liquid level in the plant cultivation pot corresponding to a plant cultivating location and a lower liquid level away from the plant cultivating location and is connected to a liquid input tube corresponding to the lower liquid level, the liquid input tube being connected to a inverse U-shaped tube corresponding to the upper liquid level via a first connection tube, the inverse U-shaped tube including another end connected to a liquid discharge tube via a second connection tube to deliver cultivation liquid to the cultivation liquid storage tank; wherein the liquid discharge tube and the second connection tube are bridged by an intermediate tube which is formed at an inner diameter smaller than that of the second connection tube and the liquid discharge tube. |
