Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
  • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
  • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
  • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
  • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
  • B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
  • B05B1/3436—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
  • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape

Definitions

• the present invention relates to a spray nozzle.
• the invention relates to a divergent nozzle spray nozzle for liquid cosmetics and pharmaceutical dispensers or perfumes.
• Conventional nozzles are mounted on manually operated dispensers equipped with a pump or valve and include a vortex chamber disposed downstream of the pump.
• This chamber is fed by a network of peripheral channels and opens out through a central ejection duct oriented along the axis of the chamber. Its function is to print a fast rotational movement to the flow of pressurized product delivered by the pump or the valve before its escape to the outside, in the form of aerosol or mist of fine droplets, via the conduit of ejection.
• the two main parameters of the spray are the angle of the spray cone and the size of the product droplets.
• the ejection duct usually used has a generally cylindrical profile and changes that can be made to the dimensions of the duct alone (diameter and / or length) do not allow such adjustments to be made significantly.
• dimensional changes impose heavy and costly industrial constraints for the manufacturing process (major overhaul of injection molds).
• the present invention aims to solve this technical problem satisfactorily.
• the outlet section of said duct has an area which is up to 5 times larger than that of the inlet section.
• This structural modification of the duct has the effect of reducing the speed of rotation of the liquid along the ejection duct and, consequently, of reducing the angle of the spray cone at the outlet of the orifice of said duct.
• the axis of said duct is parallel to the axis of the swirl chamber and is preferably merged with it.
• the axis of said duct is inclined with respect to the axis of the swirl chamber.
• the inlet section of said duct is offset relative to the center of the swirl chamber.
• the ratio of the length of the duct to the smallest dimension of its inlet section is between 0.25 and 5.
• the outlet section of said duct is elliptical.
• the ejection duct is capable of receiving, by internal fitting, an insert intended to reduce the internal diameter of the product passage.
• the ejection duct consists of a tubular element reported retained by radial tight clamping in the exhaust port of the vortex chamber.
• the invention makes it possible to adapt the nozzle to different types of products and / or applications by modifying only the geometry of the duct and without it being necessary to change the pump, or to modify the structure of the vortex chamber. that of the channels.
• the nozzle of the invention can be manufactured in a simplified manner because the modifications to be made to the existing molds are easy and the new profile of the conduit facilitates demolding.
• FIG. 1 represents a partially sectioned perspective view of an embodiment of the nozzle of the invention
• FIG. 2 represents an axial sectional view of the embodiment of FIG. 1,
• FIG. 3 represents a perspective bottom view of the embodiment of the preceding figures
• FIG. 4 represents a view in axial section of a first variant embodiment of the nozzle of the invention
• FIG. 5 shows a bottom view in perspective of a second embodiment of the nozzle of the invention.
• the nozzle shown in the figures is intended to equip sprayers with liquid cosmetic or pharmaceutical products or perfumes.
• These sprayers are provided in particular with a pump or a valve for delivering the pressurized liquid from a reservoir such as a bottle (not shown).
• the nozzle is disposed at the end of the sprayer, downstream of the pump or the valve.
• a vortex chamber 1 supplied with pressurized liquid by a network of peripheral channels 2 and opening to the outside via an ejection duct 3 (see FIGS. 2 and 3).
• the function of the chamber 1 is to impart a rapid rotational movement to the liquid before its escape via the orifice delimited by the inlet section 30 of the ejection duct 3.
• the liquid is then diffused in the form of fine droplets. outside in the form of a cone spray (referenced C and shown by dashed lines in FIGS. 1 and 2), via the outlet section 31 of the duct 3.
• the duct 3 is formed through the end wall of the chamber 1.
• the thickness of the end wall 11 of the chamber 1 corresponds to the length of the duct 3.
• the ejection duct 3 has an inlet section 30 of the liquid which is different in area and / or geometry of the outlet section 31.
• the ejection duct 3 is frustoconical with a circular inlet section 30 which is smaller than the also circular outlet section 31 so as to form a divergent duct.
• the Y axis of the duct is parallel to the axis X of the chamber 1 and is even here confused with it through the center O of said chamber ( Figure 3).
• the angle of the spray cone is 55 °.
• a cylindrical duct of the same length and 0.32 mm in diameter, coupled to a vortex chamber and channels identical to the preceding and in association with a pump or a valve and a given liquid would produce a cone angle of 90 °.
• the cone angle drops to 30 °.
• the spray angle is therefore considerably reduced because of the increase in the differential of the sections of the duct 3 and, conversely, it increases when this sectional differential decreases.
• the outlet section 31 of the duct 3 has an area which is up to 5 times larger than that of the inlet section 30.
• the ratio of the length L of the duct 3 to the smallest dimension of its inlet section 30 is between 0.25 and 5.
• the smallest dimension is the internal diameter of the duct 3. the entrance of the conduit. If it is an elliptical section, the smallest dimension would be the minor axis.
• inlet section 30 and the outlet section 31 of the duct 3 have respective profiles or contours of distinct geometries.
• the inlet section 30 may be circular while the outlet section 31 is elliptical or oval which generates a bean-shaped or flattened spray.
• the ejection duct 3 is capable of receiving by internal fitting an insert intended to reduce the inner diameter of the product passage. To resist the pressure of the product during ejection, it is then preferable to provide a slight radial clamping between the insert and the inner wall of the duct 3.
• the ejection duct is itself constituted by a tubular element retained retained by radial tight clamping in the exhaust orifice of the vortex chamber 1 forming the inlet section 30 of the duct 3.

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• Nozzles (AREA)
• Jet Pumps And Other Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36061500

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Citations (1)

Family Cites Families (7)

• 2005
  • 2005-07-22 FR FR0552285A patent/FR2888762B1/fr active Active
• 2006
  • 2006-06-30 WO PCT/FR2006/001555 patent/WO2007012715A2/fr not_active Application Discontinuation
  • 2006-06-30 EP EP06778743A patent/EP1907127A2/de not_active Withdrawn
• 2008
  • 2008-01-18 US US12/016,432 patent/US20080179428A1/en not_active Abandoned

Patent Citations (1)

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