PROBLEM TO BE SOLVED: To provide a fluid injection method in which an excision force and an excision speed can be independently adjusted.SOLUTION: There is provided a fluid injection method related to a fluid injection device 1 comprising: a pulsation generating part 20 configured to inject fluid in a pulsed way from a fluid injection opening 96 by changing the volume of a pressure chamber 80 with a piezoelectric element 30 and a diaphragm 40 and a pump 10 which supplies fluid to the pulsation generating part 20. In the method, a 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 proportionally changed. An excision force and an excision speed can be independently adjusted since the amount of the volumetric change in the pressure chamber 80 (excluded volume) changes the excision force, and the product of the excluded volume and the drive frequency changes the excision speed.COPYRIGHT: (C)2014,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
