PROBLEM TO BE SOLVED: To detect a flow passage of fluid being unable to be closed.SOLUTION: A fluid injection device comprises: a fluid container having a fluid storage section and a fluid outlet formed on the fluid storage section a fluid pressing section being moved following a movement command and causing fluid to outflow from the fluid outlet by pressing the fluid storage section connection piping having one end connected to the fluid outlet a fluid injection section injecting the fluid taken in from a fluid intake port connected with the other end of the connection piping in a pulsed manner a pressure detection section detecting a pressure in the fluid storage section a flow passage open/close section opening and closing a flow passage in the connection piping a pressing control section outputting the movement command in a state of the flow passage being closed and controlling a pressure in the fluid storage section such that a value of the pressure is closer to a target pressure value a movement speed acquisition section acquiring a movement speed of the fluid pressing section and a flow passage determination section determining the flow passage not to be closed when the movement speed after a predetermined period of time has elapsed since a difference between the value of the pressure in the fluid storage section and the target pressure value was less than a predetermined value is equal to a predetermined speed or more.COPYRIGHT: (C)2016,JPO&INPIT【課題】流体の流路が閉塞できないことを検知する。【解決手段】流体収容部と流体収容部に形成される流体出口とを有する流体容器と、移動指令に従って移動して流体収容部を押圧することにより流体出口から流体を流出させる流体押圧部と、一端が流体出口に接続される接続配管と、接続配管の他端が接続される流体取入口から取り入れた流体をパルス状に噴射する流体噴射部と、流体収容部内の圧力を検知する圧力検知部と、接続配管内の流路を開閉する流路開閉部と、流路を閉塞させた状態で移動指令を出力し流体収容部内の圧力を目標圧力値に近づけるように制御する押圧制御部と、流体押圧部の移動速度を取得する移動速度取得部と、流体収容部内の圧力と目標圧力値との差が所定値未満になってから所定時間経過後の移動速度が所定速度以上である場合には流路が閉塞されていないと判定する流路判定部と、を備えることを特徴とする流体噴射装置【選択図】図9
