PROBLEM TO BE SOLVED: To realize a fluid injection method capable of independently adjusting ablation force and an ablation speed.SOLUTION: A fluid injection method related to a fluid injection device 1 comprising: a pulsating flow generation section 20 for causing the volume of a pressure chamber 80 to be changed by a piezoelectric element 30 and a diaphragm 40, and injecting fluid from a fluid injection opening portion 96 in a pulsed manner and a pump 10 for supplying the fluid to the pulsating flow generation section 20. In the fluid injection method, a fluid supply flow rate supplied from the pump 10 and a frequency of a volumetric change of the pressure chamber 80 (equivalent to a drive frequency of the piezoelectric element 30) are changed in a proportional relationship. A volumetric change amount (excluded volume) of the pressure chamber 80 changes ablation force, and a product of the excluded volume and the drive frequency changes an ablation speed. Accordingly the ablation force and the ablation speed can be independently adjusted.COPYRIGHT: (C)2015,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
