Methods of improving accuracy of droplet metering using at least one on-actuator reservoir as the fluid input. In some embodiments, the on-actuator reservoir that is used for metering droplets includes a loading port, a liquid storage zone, a droplet metering zone, and a droplet dispensing zone. The on-actuator reservoirs are designed to prevent liquid flow-back into the loading port and to prevent liquid from flooding into the droplet operations gap in the dispensing zone.

A spray ionization device comprising: a first pipe body that has a first flow path which allows a liquid to flow therethrough, and has, at one end thereof, a first outlet through which the liquid is sprayed out; a second pipe body that surrounds the first pipe body; and a third pipe body that surrounds the second pipe body with a space interposed therebetween, that has a second flow path allowing a gas to flow therethrough, and that has a second outlet at the one end. At least the leading end part of the third pipe body including the second outlet is made of an electrically conductive material so as to serve as an electrode. Charged droplets can be sprayed from the second outlet by applying an electric field to droplets sprayed from the first outlet using a power supply connected to the electrode.

The present disclosure provides an electrostatic nozzle and a controllable jet minimal quantity lubrication (MQL) grinding system. The electrostatic nozzle comprises a nozzle core; an upper nozzle body is connected above the nozzle core; a free space is formed between the upper nozzle body and the nozzle core for storing compressed air and reducing pressure; a lower nozzle body is connected below the nozzle core; a gas-liquid mixing chamber, an acceleration chamber and a nozzle outlet are sequentially arranged inside the nozzle core from top to bottom; and micro-bulges are uniformly distributed on an inner wall of the acceleration chamber.

Described herein is a method of coating a prosthetic device, such as an ocular prosthetic device, the method comprising nanoelectrospraying droplets comprising an active ingredient and/or a carrier species onto a surface of the prosthetic device in a predetermined pattern, the nanoelectrospraying involving controlling the flow rate of the droplets from a nozzle of the nanoelectrospraying equipment by controlling the voltage between the nozzle and the ocular prosthetic device. Also described herein are ocular prosthetic device formable according to the method.

A discharge device according to the present disclosure includes a discharge electrode and a voltage applicator that applies a voltage to the discharge electrode and thus causes discharge that is further developed from corona discharge at the discharge electrode. The discharge is discharge in which a discharge path is intermittently formed by dielectric breakdown so as to stretch from the discharge electrode to a surrounding. This discharge can be called leader discharge. This makes it possible to increase an amount of generated active component while keeping an increase of ozone small.

A printer is configured to provide a jet of extraction gas that extracts a printing fluid from a printing nozzle in the presence of an electric field that accelerates the extracted printing fluid toward a printing substrate. The printer is also configured to selectively turn the electric field and the jet of extraction gas off and on to enable printing in gas-extraction mode, an e-assisted gas-extraction mode, or an e-jet mode. The jet of gas can be provided by a second nozzle concentric with the printing nozzle. A third nozzle can discharge a focusing gas around the extracted printing fluid.

An electrospray apparatus including a plurality of emitters, disposed on a substrate, wherein the plurality of emitters can have a narrow parameter distribution.

The invention relates to a method of depositing a substance onto a substrate (6), comprising: —providing a substrate (6) at a distance from a conducting spraying nozzle (1), said spaying nozzle (1) having an outlet (2); —providing a liquid composition containing the substance to the spraying nozzle (1); —generating electrically charged liquid droplets from the liquid composition between the outlet (2) of the spraying nozzle (1) and the substrate (6), by providing compressed gas around the liquid composition flowing out of the outlet (2) of the spraying nozzle (1) and by providing an electric field downstream of the outlet (2) of the spraying nozzle (1); and collecting the generated liquid droplets on the substrate (6). The invention also relates to an installation for carrying out this method.

The present invention discloses a water mist nano gasification conversion device, including a main body (1), an electronic high-voltage generator (5), a water inlet (3), a water supply tank (4), an electronic water mist spraying device (6) arranged in the water supply tank (4), and an atomization tube (2) arranged above the water supply tank (4). Water droplets and water mist sprayed by the electronic water mist spraying device (6) by using a negative electric field are blown into an electric field region which is arranged in the atomization tube (2) for ionization and decomposition. The nanoscale water mist generated by the device has the advantages of sterilizing and humidifying the air, improving air cleanliness and achieving skin moisturization.

An apparatus is provided for generating water droplets. The apparatus includes: a condensation rod for condensing water vapor in air surrounding the condensation rod on the condensation rod; a cooling device being in contact with the condensation rod for cooling the condensation rod; a discharge electrode group including a first electrode and a second electrode cooperating with each other, the first electrode and the second electrode being disposed laterally, and the first electrode and the second electrode are respectively disposed on both sides of the condensation rod; and a high voltage power supply for applying a high voltage to the discharge electrode group to generate a high voltage corona between the first electrode and the second electrode; where the discharge electrode group applies the high voltage corona to the condensation rod, so that condensed water on the condensation rod is excited by the high voltage corona to form atomized water droplets.