AUTOMATIC FAUCET DEVICE

PROBLEM TO BE SOLVED: To provide an automatic faucet device capable of preventing erroneous detection due to water splashing such as throwaway water from a cup, in the automatic faucet device in which a radio wave sensor is arranged in an upper position than a water discharge port.SOLUTION: In an automatic faucet device 1, a radio wave sensor 30 is arranged in a higher position than a water discharge port 25, and forms an effective radio wave area R being a detection range of a detection object H toward a radio wave radiation direction A in the lower direction from the radio wave sensor 30. An inner surface of a bowl part 10 comprises a water receiving area Sincluding a water receiving surface for receiving a discharge water flow of discharged from the water discharge port 25, a sensor arrangement area Sextending upward from the water receiving area Sand a connection area Sfor connecting them. The effective radio wave area R includes a corner part space area Rbetween the water receiving area Sand the sensor arrangement area S, and the connection area Sis formed with a slit-like groove 50 for preventing fluid F flowing in the water receiving area Sfrom rebounding toward the corner part space area Rafter reaching the sensor arrangement area S.SELECTED DRAWING: Figure 8 【課題】吐水口よりも電波センサが上方位置に配置された自動水栓装置において、コップからの捨て水等の水跳ねによる誤検知を防止することができる自動水栓装置を提供する。【解決手段】自動水栓装置１において、電波センサ３０は、吐水口２５よりも高い位置に配置されており、電波センサ３０から下方向の電波放射方向Ａに向けて被検知体Ｈの検知範囲である有効電波領域Ｒを形成し、ボウル部１０の内表面は、吐水口２５から吐水される吐水流を受ける受水面を含む受水領域Ｓ1と、受水領域Ｓ1から上方に延びるセンサ配置領域Ｓ2と、これらを接続する接続領域Ｓ3とを有し、有効電波領域Ｒは、受水領域Ｓ1とセンサ配置領域Ｓ2との角部空間領域ＲCを含み、接続領域Ｓ3には、受水領域Ｓ1を流れる流体Ｆがセンサ配置領域Ｓ2に達して角部空間領域ＲCに向けて跳ね返ることを防止するスリット状溝５０が形成されている。【選択図】図８