PROBLEM TO BE SOLVED: To provide a water supply device that can appropriately supply water, etc. to earth in a flowerpot or planter, supplying water or dispersant stably such that it can be understood and visually confirmed that water is supplied, and appropriately controlling the initiation and termination of water supply, or the amount of water supplied in response to changes in the weather when raising plants in flowerpots or planters, etc.SOLUTION: A water supply device comprises: a reverse water tank which is sealed at the top and has an opening at the bottom； a holding part connected to the opening of the reverse water tank in an air tight manner； a cavity part connected to the holding part in an air tight manner； a regulating reservoir that is connected to the cavity part in an air tight manner and that has an outer air opening at the top； and drainage holes provided in the regulating reservoir. The floor height of a drainage opening of the drainage hole is no more than the height of the lower edge of the opening of the reverse water tank and the ceiling height of the lowest portion of the ceiling of the cavity part. The water level within the regulating reservoir is maintained at a predetermined height, the water pressure applied to the drainage opening is controlled, controlling the water supply speed together with the initiation and termination of water supply.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】植木鉢やプランター等での育成においては、水や分散剤液を安定的に且つ実感と目視確認で給水し、更に天候の変化等に応じて給水の開始や停止や時間当たりの給水量を適宜コントロールして、鉢やプランター内の土に水等を適切に行き渡らせる給水器が求められている。【解決手段】下に口を持ち、上方が密封の逆水槽部と、前記逆水槽部の前記口に気密接続する保持部と、保持部に気密接続する通洞部と、前記通洞部に気密接続し上方に外気口を持つ調整池部と、前記調整池部に設けられた排水孔部で構成され、前記排水孔部の排水口の床高は前記逆水槽部の口の下縁の高さ及び前記通洞部の天井の最も低い部分の天井高以下であることを特徴とする給水器を提供する。調整池内の水位を所定高に保ち、排水口にかかる水圧をコントロールして給水速度を制御し、併せて給水の開始・停止を行えるようにする。【選択図】図１
