PROBLEM TO BE SOLVED: To provide a preferable fluid jetting apparatus that continuously jets a pulsating flow with a desired jetting force maintained.SOLUTION: A fluid jetting apparatus 1 is constituted by including a fluid jetting section 2 and a drive section 30 that supplies a drive signal to an piezoelectric element 401, where the fluid jetting section 2 has a pulsation generating section 100 containing a fluid chamber 501 whose volume is changeable, an inlet channel 503 and an outlet channel 511 that communicate with the fluid chamber 501, the piezoelectric element 401 a connection channel 201 one end of which communicates with the outlet channel 511 and the other end of which is provided with a fluid jetting opening 212 a connection channel pipe 200 that transmits a pulsation from the fluid chamber 501 to the fluid jetting opening 212 and a pump 20 that supplies the fluid. The drive section 30 controls the transmitted contents of the driving signals formed of signal waveforms including a compression drive waveform section that drives the piezoelectric element 401 to compress the volumes to allow the fluid flowing toward the fluid chamber 501 to return to a normal state before each continuously-transmitted content of the compression drive waveform section is supplied.COPYRIGHT: (C)2013,JPO&INPIT【課題】所望の噴射力を維持した状態で脈動流を継続して噴射するのに好適な流体噴射装置を提供する。【解決手段】流体噴射装置1を、容積が変更可能な流体室501と、流体室501に連通する入口流路503及び出口流路511と、圧電素子401を含む脈動発生部100と、出口流路511に一方の端部が連通され他方の端部に流体噴射開口部212が設けられた接続流路201と、流体室501からの脈動を流体噴射開口部212に伝達する接続流路管200と、流体を供給するポンプ20とを有する流体噴射部2と、圧電素子401に駆動信号を供給する駆動部30とを含む構成とした。そして、駆動部30は、前記容積を圧縮するように圧電素子401を駆動する圧縮駆動波形部を含む信号波形から構成される駆動信号の供給内容を、連続して供給される圧縮駆動波形部の各々の供給前に、流体室501に向かって流れる流体が定常状態に戻るように制御する。【選択図】図1
