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AssigneeMedspray B.V.
InventorsCornelis Johannes Maria Van Rijn, Wietze Nijdam, Wilhelmus Petrus Johannes De kruijf, Henri Joseph Van Egmond
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The present invention provides a spray device that generates a fluidic micro-jet spray and that allows and retains a relatively narrow droplet size distribution, of micro-jets and droplets obtained via the Rayleigh breakup mechanism, under a well-defined control of coalescence. To that end a spray device is characterized in that a spray nozzle unit is formed by a nozzle body (1), comprising a support body (2) with at least one cavity (3) spanned by a membrane layer (4) having a nozzle orifice throughout a thickness of said membrane layer at an area of said cavity (3) in fluid communication with that cavity (3). The nozzle orifice may be part of a first relatively dense group of first orifices (5a) or of a less dense second group of second nozzle orifices (5b) in the membrane layer. A mean diameter of the nozzle orifices (5a) located in the first group substantially differs from the mean diameter of the nozzle orifices (5b) in the second group to obtain a uniform droplet size distribution in the spray.
A spray device for generating a micro jet spray comprising a spray nozzle unit having at least one spray nozzle body, wherein said at least one spray nozzle body comprises at least one cavity for receiving a pressurized fluid and a number of orifices that during operation receive said pressurized fluid and release a ray of consecutive droplets to said external environment, each of said at least one cavity being bounded by a membrane layer that separates said cavity from an external environment and that comprises at least one of said number of orifices in fluid communication with said cavity extending throughout a thickness of said membrane layer, wherein said number of orifices comprises group of first orifices of substantially identical first size that release rays of droplets in a first region of said micro jet spray, and wherein said number of orifices comprises a group of second orifices of substantially identical second size that release rays of droplets in a second region of said micro jet spray, characterized in that a ray density of said first region is higher than a ray density of said second region, in that said first size of said first orifices is smaller than said second size of said second orifices, and in that said first and said second orifices generate droplets of substantially a same size in said first region and said second region respectively.
Dependencies are inferred from the claim text.