FLUID EJECTION DEVICE AND MEDICAL APPARATUS

摘要

A fluid ejection device which ejects a fluid includes: an ejection tube which ejects the fluid; a fluid chamber which communicates with the ejection tube; a piezoelectric element capable of changing a volume of the fluid chamber; a controller which controls a drive voltage applied to the piezoelectric element; and a fluid supplying unit which supplies the fluid to the fluid chamber at a predetermined flow rate. If a maximum frequency available to be set of the drive voltage is fmax [Hz] and an amount of change in the volume of the fluid chamber when a maximum value available to be set of the drive voltage is applied to the piezoelectric element to drive the piezoelectric element is V1 [ml], the fluid supplying unit supplies the fluid at the predetermined flow rate above V1×fmax [ml/s].

主权项

1. A fluid ejection device which ejects a fluid, comprising:
an ejection tube which ejects the fluid; a fluid chamber which communicates with the ejection tube; a fluid supplying unit which supplies the fluid to the fluid chamber at a predetermined flow rate; a pulsation generator which causes the fluid in the fluid chamber to be ejected from the ejection tube; and a controller which controls operation of the pulsation generator to cause the fluid to be ejected periodically from the ejection tube; wherein if a maximum frequency at which the control unit causes the fluid to be ejected is fmax [Hz], and an amount of change in volume of the fluid chamber when the control unit causes the pulsation generator to operate is V1 [ml], the fluid supplying unit supplies the fluid at the predetermined flow rate above V1×fmax [ml/s].