Abstract:
The invention relates to a device and a method for spraying, especially in the form of a layer of a liquid that can be electrically insulating at least by electrostatic forces, said device being designed to spray said liquid or to control oscillations therein by generating beats. The invention especially relates to a fuel injector for the combustion chamber of a heat engine comprising said device. Said spray device (1) comprises a nozzle that forms a channel (14) for supplying liquid to at least one opening (15) for spraying said liquid outside the device, and comprises, close to said opening, a first and a second electrode (7 and 12) arranged in such a way as to inject electric charges into the liquid. According to the invention, the edge (15) of the opening comprises, on one side of the channel, at least one projecting end (7a) of the first electrode (7) that projects into said channel and is to be brought into contact with the liquid, and on another side of the channel, an electrically insulating nozzle body (8) in which the second electrode (12) is embedded adjacently to the first electrode, in such a way that the intensity of the electrostatic field in the or each projecting end is maximised.
Abstract:
The invention relates to a method and device for obtaining micro and nanometric particles in a controlled, reproducible manner. The aforementioned particles have a spherical shape and a very narrow, uniform size distribution. More specifically, the invention relates to a novel method of forming emulsions and to the application thereof in micro and nanoencapsulation techniques involving the extraction/evaporation of the solvent. In particular, the invention relates to the encapsulation of the fluorescent compounds and the subsequent application thereof.
Abstract:
A jetting nozzle for producing a high velocity fluid (10) has its external surface (2) formed as a fluidic surface and means (6, 7, 8) are provided for directing a second lower velocity jet of fluid, which may be the same as or different from the fluid of the high velocity jet (10), onto said external surface (2) such that the fluid of the second jet flows in contact with the fluidic surface to surround the high velocity jet, thereby reducing the rate of divergence of the high velocity jet (10) preserving its energy and increasing its effective range.
Abstract:
A jetting nozzle for producing a high velocity fluid (10) has its external surface (2) formed as a fluidic surface and means (6, 7, 8) are provided for directing a second lower velocity jet of fluid, which may be the same as or different from the fluid of the high velocity jet (10), onto said external surface (2) such that the fluid of the second jet flows in contact with the fluidic surface to surround the high velocity jet, thereby reducing the rate of divergence of the high velocity jet (10) preserving its energy and increasing its effective range.
Abstract:
Disclosed are systems, devices and methods related to paint delivery and recirculation during manufacture of radio-frequency modules. A closed recirculation system can include a reservoir for holding a volume of metallic paint, a spray apparatus for spraying metallic paint received from the reservoir, and a recirculator for recirculating the un-sprayed metallic paint back to the reservoir. In some embodiments, the recirculator can include a peristaltic pump that allows use of shorter fluid paths and provide a desired level of agitation to quickly achieve and maintain an acceptable level of metal particle suspension. In some embodiments, the spray apparatus can be implemented to have reduced dimensions, and include a mechanism for switching between a spray mode and a recirculate mode. Such a spray apparatus can reduce the amount of paint being utilized, and also reduce accumulation of metal particles therein.
Abstract:
La présente invention concerne un dispositif et un procédé de projection en particulier sous forme de nappe d'un liquide pouvant être électriquement isolant au moins par des forces électrostatiques, le dispositif étant conçu pour pulvériser ce liquide ou pour en contrôler des oscillations en y générant des battements. L'invention concerne notamment un injecteur de carburant pour chambre de combustion d'un moteur thermique incorporant ce dispositif. Ce dispositif de projection (1 ) comprend une buse qui forme un canal d'amenée (14) du liquide vers au moins un orifice de projection (15) de ce dernier hors du dispositif et qui incorpore à proximité de cet orifice une première et une seconde électrodes (7 et 12) agencées pour injecter des charges électriques dans le liquide. Selon l'invention, le bord (15) de cet orifice comprend, d'un côté du canal, au moins une extrémité saillante (7a) de la première électrode (7) qui fait saillie dans ce canal et qui est destinée à être en contact avec le liquide et, d'un autre côté du canal, un corps de buse (8) électriquement isolant dans lequel est noyée la seconde électrode (12) de manière adjacente à la première électrode, de sorte que l'intensité du champ électrostatique en la ou chaque extrémité saillante soit maximisée.