Abstract: A liquid ejection device includes: a nozzle including a nozzle opening through which a liquid is ejected; a liquid transfer tube through which the liquid is transferred to the nozzle; and a first tube with the nozzle and the liquid transfer tube being provided therein, having a first end and a second end, and having a first opening at the first end, in which the nozzle opening is positioned closer to a second end side than the first opening of the first tube, and when a position where the liquid ejected from the nozzle becomes a droplet is set as a droplet formation position, and a distance from the nozzle opening to the droplet formation position is set as a droplet formation distance, a distance between the nozzle opening and the first opening is equal to or greater than the droplet formation distance.

Abstract: A fabric processing device includes a transport unit configured to transport a fabric in a transport direction; a support unit configured to support the fabric; and a liquid ejecting unit configured to eject a liquid onto the fabric supported by the support unit. The liquid ejecting unit is configured to eject the liquid in a continuous flow at an ejecting speed of 30 m/s or more, and the liquid ejected as the continuous flow is caused to collide with the fabric in a state of being liquid droplets to process the fabric. The fabric processing device having such a configuration can effectively improve texture of the fabric.

Abstract: A liquid ejection device includes: a nozzle through which a liquid is ejected; a liquid transporting pipe coupling to the nozzle; a pulsation generator configured to change a volume of a liquid chamber coupling to the liquid transporting pipe; a pump configured to send a liquid to the liquid transporting pipe; and a control unit configured to control driving of the pulsation generator and the pump. The control unit drives the pulsation generator and the pump such that Vf/Q is 0.3 or more, in which V [mm3] is a volume change amount of the liquid chamber, Q [mL/min] is a flow rate of a liquid to the liquid transporting pipe by the pump, and f [kHz] is a frequency at which the pulsation generator applies a pulsation to a liquid.

Abstract: A liquid ejection device includes: a nozzle through which a liquid is ejected; a liquid transport pipe that transports the liquid to the nozzle; and a vibrator that is configured to generate a vibration. The vibrator is in contact with at least one of the liquid, the nozzle, and the liquid transport pipe, and a vibration frequency generated by the vibrator is higher than a self-droplet formation frequency, the self-droplet formation frequency is defined as the number of droplets of the liquid passing through a predetermined position per unit time in a state in which the vibrator does not generate the vibration.

Abstract: Provided is a liquid ejection device that includes a nozzle that ejects a liquid, a liquid conveying tube that conveys the liquid to the nozzle, an outer tube that is internally provided with the nozzle and the liquid conveying tube, and a first vibration applying unit that applies vibration to the nozzle or the liquid conveying tube. The first vibration applying unit is provided between the nozzle and the outer pipe or between the liquid conveying tube and the outer pipe.

Abstract: A liquid ejection device includes: a nozzle through which a liquid is ejected; a liquid transfer tube through which the liquid is transferred to the nozzle; and a vibration generation unit configured to generate vibration, in which the vibration generation unit is in contact with one of the liquid, the nozzle, and the liquid transfer tube, and when the liquid ejected from the nozzle flies as a plurality of droplets in a state where the vibration generation unit does not generate vibration, and the number of the droplets passing through a predetermined position in a unit time is defined as a droplet frequency, a frequency of the vibration generated by the vibration generation unit is equal to or less than the droplet frequency.

Abstract: Provided is a liquid jetting device for skin cleaning configured to clean a skin using liquid droplets generated from a jetted continuous flow, wherein the liquid jetting device includes a jetting nozzle having a plurality of jetting nozzle holes. Further, an interval between each of the plurality of jetting nozzle holes is 1 mm or smaller, and a diameter of the jetting nozzle hole is in a range from 0.02 mm to 0.1 mm.

Abstract: Provided is a liquid jetting nozzle including a nozzle hole, the liquid jetting nozzle be configured to hit liquid droplets against a target object, the liquid droplets being generated from a continuous flow of a liquid jetted from the nozzle hole, wherein a nozzle hole diameter of the nozzle hole is in a range of from 0.01 mm to 0.15 mm, and a ratio of an opening diameter of a liquid inlet through which a liquid flows into the nozzle hole to a nozzle hole diameter is in a range of from 5 to 150.

Abstract: A liquid jet device for skin cleaning includes a liquid jet nozzle including a nozzle hole, a pressurized liquid supply unit configured to pressurize liquid and supply the liquid to the liquid jet nozzle, and a processor configured to control operation of the pressurized liquid supply unit to cause the liquid jetted from the nozzle hole to fly as droplets formed by splitting a continuous flow, in which a nozzle hole diameter of the nozzle hole is from 0.01 mm to 0.03 mm, and the processor controls a supply pressure of the pressurized liquid supply unit such that a jetting velocity of the liquid jetted from the nozzle hole is from 10 m/s to 60 m/s.

Abstract: A liquid jet nozzle is a liquid jet nozzle that has a nozzle hole, and a liquid flow path having a diameter greater than that of the nozzle hole and coupled to the nozzle hole, and hits a droplet, generated from a continuous flow jetted from the nozzle hole, against a target object, wherein the nozzle hole has a cylindrical shape, and a curvature radius of an inlet edge of the nozzle hole is equal to or less than 25% of a nozzle hole diameter of the nozzle hole, the inlet being coupled to the liquid flow path.

Abstract: A liquid ejection device includes: a nozzle configured to eject a liquid; an airflow introduction member configured to introduce an airflow to the liquid; a liquid feeding pump configured to adjust a pressure of the liquid; a pressure pump configured to adjust an introduction pressure of the airflow introduced by the airflow introduction member; and a processor configured to control driving of the liquid feeding pump and the pressure pump, and the processor controls a ratio of the introduction pressure of the airflow to an ejection pressure of the liquid to be 0.005 or more and 0.11 or less.

Abstract: A liquid ejection device includes: a nozzle through which a liquid is ejected; a liquid transfer tube through which the liquid is transferred to the nozzle; and a vibration generation unit configured to generate vibration, in which the vibration generation unit is in contact with one of the liquid, the nozzle, and the liquid transfer tube, and when the liquid ejected from the nozzle flies as a plurality of droplets in a state where the vibration generation unit does not generate vibration, and the number of the droplets passing through a predetermined position in a unit time is defined as a droplet frequency, a frequency of the vibration generated by the vibration generation unit is equal to or less than the droplet frequency.

Abstract: A liquid ejection device includes: a nozzle through which a liquid is ejected; a liquid transfer tube through which the liquid is transferred to the nozzle; and a vibration generation unit configured to generate vibration, in which the vibration generation unit is in contact with one of the liquid, the nozzle, and the liquid transfer tube, and when the liquid ejected from the nozzle flies as a plurality of droplets in a state where the vibration generation unit does not generate vibration, and the number of the droplets passing through a predetermined position in a unit time is defined as a droplet frequency, a frequency of the vibration generated by the vibration generation unit is equal to or less than the droplet frequency.

Abstract: A liquid ejection device includes: a nozzle through which a liquid is ejected; a liquid transporting pipe coupling to the nozzle; a pulsation generator configured to change a volume of a liquid chamber coupling to the liquid transporting pipe; a pump configured to send a liquid to the liquid transporting pipe; and a control unit configured to control driving of the pulsation generator and the pump. The control unit drives the pulsation generator and the pump such that Vf/Q is 0.3 or more, in which V [mm3] is a volume change amount of the liquid chamber, Q [mL/min] is a flow rate of a liquid to the liquid transporting pipe by the pump, and f [kHz] is a frequency at which the pulsation generator applies a pulsation to a liquid.

Abstract: A liquid ejection device includes: a nozzle configured to eject a liquid; an airflow introduction member configured to introduce an airflow to the liquid; a liquid feeding pump configured to adjust a pressure of the liquid; a pressure pump configured to adjust an introduction pressure of the airflow introduced by the airflow introduction member; and a processor configured to control driving of the liquid feeding pump and the pressure pump, and the processor controls a ratio of the introduction pressure of the airflow to an ejection pressure of the liquid to be 0.005 or more and 0.11 or less.

Abstract: A liquid ejection device includes: a nozzle through which a liquid is ejected; a liquid transfer tube through which the liquid is transferred to the nozzle; and a vibration generation unit configured to generate vibration, in which the vibration generation unit is in contact with one of the liquid, the nozzle, and the liquid transfer tube, and when the liquid ejected from the nozzle flies as a plurality of droplets in a state where the vibration generation unit does not generate vibration, and the number of the droplets passing through a predetermined position in a unit time is defined as a droplet frequency, a frequency of the vibration generated by the vibration generation unit is equal to or less than the droplet frequency.

Abstract: A liquid ejection device includes: a nozzle including a nozzle opening through which a liquid is ejected; a liquid transfer tube through which the liquid is transferred to the nozzle; and a first tube with the nozzle and the liquid transfer tube being provided therein, having a first end and a second end, and having a first opening at the first end, in which the nozzle opening is positioned closer to a second end side than the first opening of the first tube, and when a position where the liquid ejected from the nozzle becomes a droplet is set as a droplet formation position, and a distance from the nozzle opening to the droplet formation position is set as a droplet formation distance, a distance between the nozzle opening and the first opening is equal to or greater than the droplet formation distance.

Abstract: Provided is a liquid ejection device that includes a nozzle that ejects a liquid, a liquid conveying tube that conveys the liquid to the nozzle, an outer tube that is internally provided with the nozzle and the liquid conveying tube, and a first vibration applying unit that applies vibration to the nozzle or the liquid conveying tube. The first vibration applying unit is provided between the nozzle and the outer pipe or between the liquid conveying tube and the outer pipe.

Abstract: A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid.

Abstract: A fluid injection device includes a fluid supply unit that accommodates and supplies fluid, a fluid injection unit that injects fluid supplied from the fluid supply unit, and a driving waveform generating device which is equipped with at least one adjusting device, a one-input multiple-control parameter changing unit that simultaneously changes plural control parameters for determining a fluid injection condition of the fluid injection unit on the basis of a signal from the at least one adjusting device, and a driving waveform generator that generates and outputs a driving waveform of the fluid injection unit on the basis of the control parameters set by the one-input multiple-control parameter changing unit.