PROBLEM TO BE SOLVED: To provide a watering apparatus capable of performing efficient watering by continuously adjusting a supply amount of water corresponding to illuminance of light with which plants are irradiated while increase in the size of the apparatus is suppressed.SOLUTION: A watering apparatus 10 has: a water storage tank 12 mounted on a frame 11 a supply part 13 which supplies water flowing out from the water storage tank 12 toward plants by water load an electric proportional valve 14 which adjusts a flow rate of water flowing in the supply part 13 and an electric power supply source 15 which supplies electric power to the electric proportional valve 14. Furthermore, the watering apparatus 10 has: an illuminance sensor 16a which detects illuminance of light with which plants are irradiated and a control part 18 which adjusts a valve opening degree of the electric proportional valve 14 on the basis of the illuminance detected by the illuminance sensor 16a.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】装置の大型化を抑えつつも、植物に照射される光の照度に応じて水の供給量を連続的に調整して効率の良い灌水を行うことができる灌水装置を提供すること。【解決手段】灌水装置10は、架台11に載置される貯水タンク12と、貯水タンク12から水頭圧により流れ出る水を植物に向けて供給する供給部13と、供給部13を流れる水の流量を調整する電動比例弁14と、電動比例弁14への電力を供給する電力供給源15とを有する。さらに、灌水装置10は、植物に照射される光の照度を検出する照度センサ16aと、照度センサ16aにより検出された照度に基づいて、電動比例弁14の弁開度を調整する制御部18とを有する。【選択図】図1
