PROBLEM TO BE SOLVED: To provide a technique to inject a pulsating current of appropriate force immediately after the start of the injection.SOLUTION: A fluid injection device for injecting fluid includes: an injection pipe with an opening to inject fluid a fluid chamber communicated with the injection pipe that accommodates fluid inside air bubble generation means for generating air bubbles in the fluid inside the fluid chamber a supply passage communicated with the fluid chamber opening/closing means provided in the supply passage for opening/closing the supply passage a fluid supply part for pressurizing the fluid and supplying the fluid to the fluid chamber through the supply passage and a drive control part for controlling the drive of the air bubble generation means. The drive control part executes control so that air bubble generation by the air bubble generation means is made after the opening of the supply passage by the opening/closing means.COPYRIGHT: (C)2015,JPO&INPIT【課題】噴射開始の直後から、適切な勢いの脈流を噴射することのできる技術を提供する。【解決手段】流体を噴射する流体噴射装置は、流体を噴射する開口部を有する噴射管と、噴射管に連通し、流体を内部に収容する流体室と、流体室内の前記流体内に気泡を発生させる気泡発生手段と、流体室に連通する供給流路と、供給流路に設けられ、供給流路の開閉を行なう開閉手段と、流体を加圧し、供給流路を介して流体室に流体を供給する流体供給部と、気泡発生手段の駆動を制御する駆動制御部とを備える。駆動制御部は、開閉手段による供給流路の開放より後に、気泡発生手段による気泡の発生が行われるように制御する。【選択図】図4
