PROBLEM TO BE SOLVED: To achieve a fluid injection method independently adjusting ablation force and ablation speed.SOLUTION: This fluid injection method for a fluid injection device 1 includes: a pulsating flow generating section 20 injecting fluid in a pulsed form from a fluid injection opening 96 by changing the volume of a pressure chamber 80 by a piezoelectric element 30 and a diaphragm 40 and a pump 10 supplying fluid to the pulsating flow generating section 20. A fluid supply flow rate supplied from the pump 10 and the frequency of a volumetric change in the pressure chamber 80 (equivalent to the drive frequency of the piezoelectric element 30) are changed in a proportional relationship. Since a variation in the volume (excluded volume) of the pressure chamber 80 changes the ablation force and the product of the excluded volume and the drive frequency changes the ablation speed, the ablation force and ablation speed are independently adjusted.COPYRIGHT: (C)2011,JPO&INPIT【課題】切除力と切除速度を独立して調整可能な流体噴射方法を実現する。【解決手段】流体噴射装置1に係る流体噴射方法は、圧力室80の容積を圧電素子30及びダイアフラム40により変化させて流体噴射開口部96から流体をパルス状に噴射する脈流発生部20と、脈流発生部20に流体を供給するポンプ10と、が備えられ、ポンプ10から供給される流体供給流量と、圧力室80の容積変化の周波数(圧電素子30の駆動周波数に相当)と、を比例の関係で変化させる。圧力室80の容積変化量(排除体積)は切除力を変化させ、排除体積と駆動周波数の積は切除速度を変化させることから、切除力と切除速度を独立して調整できる。【選択図】図6
