Patent EA-001156-B1 (EA)
Title: Improved flat fan spray nozzle
Inventor: SLAVAS JAMES P
IPC: B05B7/04
Filed: 1996-01-11
Abstract: 1. A nozzle (10) for mixing a liquid (1) with a gas (g), characterized by at least one inlet conduit (12, 14) for introducing the liquid and gas into the nozzle (10) a mixing chamber (50) coupled in fluid communication with the at least one inlet conduit (12, 14) for receiving and mixing the liquid and gas; and orifices (19) angularly spaced relative to each other about an axis (a) of the mixing chamber (50), inside the end portion (58) of the nozzle (10) coupled in fluid communication with the mixing chamber (50), whereby the first group of orifices (19) is arranged along one side of the plane (X-Z), oriented parallel to the axis (a) of the end portion (58) of the nozzle (10), and the second group of orifices (19) is arranged along the other side of the plane (X-Z) respective to the first group of orifices (19), characterized in that all axes of the orifices (19) are arranged at an acute angle to the plane (X-Z), and oriented so that the points of their crossing with the plane (X-Z) relate to a target (17) extends along an approximately straight line. 2. A nozzle (10) as defined in claim 1, characterized in that the orifices (19) axes of the nozzle (10) are oriented so that the points of their crossing with a plane arranged perpendicular to the (a) axis of the end portion (58) of the nozzle (10) extend along an approximately straight line. 3 A nozzle (10) as defined in claim 1, further characterized by a liquid atomizer (18, 100) coupled in fluid communication between the at least one inlet conduit (12) and the mixing chamber (50) for atomizing the liquid flowing through the at least one inlet conduit (12) and discharging the atomized liquid into the mixing chamber (50). 4. A nozzle (10) as defined in any of the preceding claims, further characterized in that the mixing chamber (50) is defined by a substantially cylindrical surface (71) extending between the liquid atomizer (18, 100) and the orifices (19) for atomizing a plurality of spray jets (19), and the ratio of the length (e) of the mixing chamber (50) to its diameter (d) is within the range of approximately 1.5 to 2.0. 5. A nozzle (10) as defined in claim 3, further characterized by the liquid atomizer (100) having at least one vane (118, 120) extending transversely relative to an elongated axis (a) of the inlet conduit (12) for receiving fluid (l) from the inlet conduit and creating a swirling annular flow, and defining at least a portion of an aperture (128) in an approximately central portion thereof for receiving fluid from the inlet conduit (12) and creating a substantially axial flow. 6. A nozzle (10) as defined in claim 5, further characterized in that the at least one vane (118, 120) defines a substantially convex lobe (130, 134) and a substantially concave lobe (132, 136). 7. A nozzle (10) as defined in claim 6, further characterized in that each lobe (130, 132, 134, 136) is approximately semi-circular. 8. A nozzle (10) as defined in either of claims 6 or 7, further characterized in that the convex lobe (130, 134) is located upstream of the concave lobe (132, 136). 9. A nozzle (10) as defined in any of claims 5 through 8, further characterized by two vanes (118, 120), and each vane extends transversely through a respective substantially semi-circular portion of the inlet conduit (12). 10. A nozzle (10) as defined in claim 3, further characterized by the liquid atomizer (18) having an approximately helical surface extending in the direction from the downstream end of the inlet conduit (12) toward the mixing chamber (50) for atomizing the liquid discharged from the conduit into the mixing chamber. 11. A nozzle (10) as defined in any of the preceding claims, further characterized in that each spray jet (19) is coupled in fluid communication with the mixing chamber (50) adjacent to a surface (71) defining the mixing chamber for receiving peripheral fluid flow from the chamber. 12. A nozzle (10) as defined in any of the preceding claims, further characterized in that the spray jets (19) are circumferentially spaced about the axis (a) of the mixing chamber (50). 13. A nozzle (10) as defined in any of the preceding claims, further characterized in that the spray jets (19) are substantially equally spaced along the target (17). 14. A nozzle (10) as defined in any of the preceding claims, further characterized in that the target (17) approximately intersects the axis (a) of the mixing chamber (50). 15. A nozzle (10) as defined in any of the preceding claims, further characterized in that a plurality of spray jets (o, q, s) emanate above the target (17) and a plurality of spray jets (n, p, r) emanate below the target (17), and the spray jets emanating above the target (o, q, s) alternately intersect the target with the spray jets emanating below the target (n, p, r). 16. A nozzle (10) as defined in any of the preceding claims, further characterized in that the spray jets (19) emanate from the nozzle at locations substantially equally spaced relative to each other about the axis (a) of the mixing chamber (50). The Eurasian patent is valid in all contracting states except for AM, KG and MD.