Method Of Determining Aperture Area And Droplet Jet Device
AssigneeSeiko Epson Corporation
InventorsHirokazu SEKINO, Shoichi TAKASUNA, Yasunori ONISHI
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Abstract
A method of determining an aperture area of a nozzle hole in a droplet jet device including a flow channel through which a liquid flows and the nozzle hole configured to spray the liquid, the method including determining the aperture area [m2] of the nozzle hole so that a jet flow of the liquid sprayed from the nozzle hole is fragmented into droplets, the liquid having a value of ρ0.45/σ determined from a density [kg/m3] of the liquid and a surface tension [N/m] of the liquid in a range no lower than 300 and no higher than 900, and a kinematic viscosity coefficient [m2/s] of the liquid in a range no lower than 1.0E-6 and no higher than 2.0E-5.
Claims2
A droplet jet device comprising:
- a flow channel through which a liquid flows;
- and
- a nozzle hole configured to spray the liquid, wherein
- the liquid has a value of ρ0.45/σ in a range of 300 to 900, wherein the ρ [kg/m3] is a density of the liquid, the σ [N/m] is a surface tension of the liquid, and ν is in a range of 1.0E-6 and 2.0E-5, wherein the ν [m2/s] is a kinematic viscosity coefficient of the liquid, and
- an aperture area of the nozzle hole S [m2] satisfies S>(−1356.5ν2+0.09908ν)χQ, wherein the Q [L/min] is a jet flow rate of the liquid from the nozzle hole, and
- a nozzle diameter D [m] of the nozzle hole is in a range of 7.00E-06 and 4.30E-03.
Dependencies are inferred from the claim text.