EP3231516B1 - Spray nozzle, in particular for a system for dispensing a pressurized fluid provided with a pushbutton, and dispensing system comprising such a nozzle - Google Patents

Spray nozzle, in particular for a system for dispensing a pressurized fluid provided with a pushbutton, and dispensing system comprising such a nozzle Download PDF

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Publication number
EP3231516B1
EP3231516B1 EP17165610.1A EP17165610A EP3231516B1 EP 3231516 B1 EP3231516 B1 EP 3231516B1 EP 17165610 A EP17165610 A EP 17165610A EP 3231516 B1 EP3231516 B1 EP 3231516B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
conic
dispensing
nozzle according
upstream end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17165610.1A
Other languages
German (de)
French (fr)
Other versions
EP3231516A1 (en
Inventor
Jean-Pierre Guy Songbe
Thomas NEVENS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silgan Dispensing Systems Le Treport SAS
Original Assignee
Albea Le Treport SAS
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Publication date
Application filed by Albea Le Treport SAS filed Critical Albea Le Treport SAS
Publication of EP3231516A1 publication Critical patent/EP3231516A1/en
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Publication of EP3231516B1 publication Critical patent/EP3231516B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • 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
    • 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
    • B05B1/34—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
    • B05B1/3494—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 the discharge outlet being not on the axis of the swirl chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1052—Actuation means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/28—Nozzles, nozzle fittings or accessories specially adapted therefor
    • 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
    • B05B1/3442—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 cone having the same axis as the outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
    • B65D83/20—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means operated by manual action, e.g. button-type actuator or actuator caps

Definitions

  • the invention relates to a spray nozzle for a receptacle, in particular for a system for dispensing a product under pressure provided with a push button.
  • the invention also relates to a distribution system comprising such a nozzle.
  • the distribution system is intended to equip bottles used in perfumery, cosmetics or for pharmaceutical treatments.
  • this type of bottle contains a product which is returned by the distribution system comprising a device for withdrawing said product under pressure, said system being actuated for example by a push button to allow the product to be sprayed.
  • the sampling device comprises a pump or a manually actuated valve, for example by means of the push button.
  • Such push buttons are conventionally made in at least two parts, including an actuating body and a spray nozzle which are assembled to one another.
  • the nozzle generally comprises a swirl chamber provided with a dispensing orifice, as well as at least one supply channel for said chamber.
  • the sampling device withdraws the product from the vial through a tube, and pushes it under pressure inside the conduit arranged in the pusher, which is the actuating element of the sampling device.
  • This conduit opens into a so-called vortex chamber intended to make the liquid turn very quickly and therefore to give it speed and the effects of centrifugal force.
  • This vortex chamber is extended at its center by an outlet orifice through which the product escapes to the outside at high speed. Driven by this speed, and subjected to centrifugal forces, the liquid splits into droplets and forms an aerosol.
  • the size of the droplets from the vortex chamber depends in part on the force and speed with which the user operates the pump by pressing the push button with his finger, since the pressure induced depends on it.
  • one technology consists in using a conical vortex chamber.
  • the flow turns in the chamber in the form of a sheet which impacts itself after its exit through the distribution orifice.
  • the document FR2952360 shows an example of such a conical vortex chamber.
  • the feed channels open out tangentially into the swirl chamber, which is cylindrical in revolution to make the product turn very quickly.
  • the dispensing orifice has a reduced diameter compared to that of said chamber so that the rotating product escapes through said orifice by impacting itself with a speed sufficient to split into droplets forming the 'aerosol.
  • the object of the invention is to solve this problem and aims to provide a spray nozzle for a dispensing system capable of spraying products whose viscosity is greater than that of water, so as to obtain droplets conforming to the size. desired for perfume, cosmetic or pharmaceutical treatment bottles.
  • the invention relates to a spray nozzle, in particular for a system for dispensing a pressurized product provided with a push button, the nozzle comprising a dispensing orifice and a swirl chamber opening onto the dispensing orifice.
  • the chamber comprising a conical part delimited by a conical lateral surface, said lateral surface conical being convergent from an upstream end towards a downstream supply end of the dispensing orifice, the nozzle further comprising at least one supply channel of said swirl chamber, the supply channel or channels opening out at the end upstream of the conical part, the conical side surface having at least one stepped portion provided with a level or a plurality of levels, and it comprises at least one continuous portion, that is to say without levels, the or the continuous portions overhang the adjacent stepped portion (s).
  • staged portions promote greater impaction of the web on itself, and thus the formation of sufficiently fine droplets. Indeed, when the fluid turns in the form of a laminar sheet on the surface of the conical part and approaches the outlet orifice, the sheet jumps from one stage to another between two levels, which causes turbulence. of its flow. Thus, it is possible to create significant turbulence despite the viscosity of the product.
  • the invention also relates to a nozzle-anvil assembly with a nozzle as described above.
  • the invention also relates to a system for dispensing a product under pressure for a receptacle, in particular a bottle of product. cosmetic, the system comprising such a spray nozzle.
  • the dispensing system preferably comprises a push button arranged to carry the spray nozzle.
  • a cosmetic product bottle comprising a system for dispensing a product under pressure according to a first embodiment.
  • the dispensing system has a push button.
  • the push button comprises a body 1 having an annular skirt 2 which surrounds a well 3 for mounting the push button on a supply tube 4 for the product under pressure.
  • the push button comprises an upper zone 5 allowing the user to exert a digital pressure on said push button in order to be able to move it axially.
  • the distribution system comprises a sampling device 6 equipped with a tube 4 for supplying the product under pressure which is inserted in a sealed manner into the well 3.
  • the distribution system also comprises mounting means 7. on a bottle 8 containing the product and means 9 for sampling the product inside said bottle which are arranged to supply the supply tube 4 with product under pressure.
  • the sampling device 6 here comprises a manually actuated pump or, in the case where the product is packaged under pressure in the bottle 8, a manually actuated valve.
  • the mounting means 7 comprise, for example, a fixing ring and a decorative hoop to hide the ring and the supply tube 4.
  • the body 1 also has an annular housing 10 which is in communication with the well 3.
  • the housing 10 has an axis perpendicular to that of the mounting well 3 to allow lateral spraying of the product relative to the shaft.
  • push button body 1 can be collinear with the well 3, in particular for a push button forming a nasal spray nozzle.
  • the housing 10 is provided with an anvil 11 around which a spray nozzle 12 is mounted so as to form a path for distributing the product under pressure between said housing and a swirl chamber. To do this, the anvil 11 extends from the bottom of the housing 10, leaving a communication channel 13 between the well 3 and said housing.
  • the distribution path has successively in communication from upstream to downstream: an upstream annular duct 18 in communication with the channel 13, said tubular duct 18 being formed between the internal face of the side wall 14 of the nozzle 12 and the outer face of the side wall of the anvil 11 which is arranged opposite; a downstream annular duct 21 formed between the proximal wall 15 of the nozzle 12 and the distal wall 17 of the anvil 11.
  • the distribution path supplies the swirl chamber 22 with product under pressure, provided with at least one channel 24 for supplying said chamber. More precisely, in the embodiment shown, the supply channels 24 communicate with the downstream annular duct 21.
  • the nozzle has two channels 24 for supplying the vortex chamber 22, said channels being arranged.
  • more than two supply channels 24 may be provided, in particular three channels 24 arranged symmetrically with respect to the distribution axis D, or a single channel 24 may be provided to supply the vortex chamber 22.
  • the association of the nozzle 12 in the housing 10 is produced by fitting the outer face of the side wall 14, the rear edge of said outer face being further provided with a radial projection 16 for anchoring the nozzle 12 in said housing. Furthermore, an imprint of the swirl chamber is formed recessed in the proximal wall 15 and the anvil 11 has a flat distal wall 17 on which the proximal wall 15 of the nozzle 12 rests to delimit the swirl assembly between them. .
  • the nozzle 12 is furthermore provided with a dispensing orifice 23 through which the product is sprayed.
  • the nozzle 12 and the body 1 are made by molding, in particular from a different thermoplastic material.
  • the material forming the nozzle 12 has a rigidity which is greater than the rigidity of the material forming the body 1.
  • the significant stiffness of the nozzle 12 makes it possible to avoid its deformation during its assembly in the housing 10 so to guarantee the geometry of the swirl chamber.
  • the lower stiffness of the body 1 allows improved sealing between the mounting well 3 and the supply tube 4.
  • the body 1 is made of polyolefin and the nozzle 12 is made of cycloolefinic copolymer (COC), poly (oxymethylene) or poly (butylene terephthalate).
  • the swirl chamber 22 comprises a cylindrical part 30 into which the downstream end of the supply channels 24 emerges tangentially, the cylindrical part being delimited by a lateral cylindrical surface 34 of revolution, which is closed towards the front by a proximal wall 35.
  • the swirl chamber 22 further comprises a conical part 31 downstream of the cylindrical part 30.
  • the conical part 31 is delimited by a lateral surface 25 which extends along a distribution axis D, the distribution channels 24 s' extending in a plane transverse to said distribution axis D.
  • a conical part is defined as being a zone in which a first end or base of the conical part 31 presents in section along a plane orthogonal to the distribution axis, a section the surface of which is greater than that of a second end or apex of the conical part 31.
  • the first and second ends are connected by a generating line which is not necessarily a line segment, but which could on the contrary be a curve having at least one plateau.
  • the base and / or the top of the conical part can be of various shapes, in particular circular, polygonal, elliptical or others.
  • the terms of positioning in space are defined with respect to the distribution axis D.
  • the lateral surface 25 is of revolution about the distribution axis D.
  • the lateral surface 25 is convergent from an upstream end 26 to a downstream end 27 for supplying the dispensing orifice 23. Further, the dispensing orifice 23 has an outlet dimension which is equal to the internal dimension of the downstream end. 27.
  • the tangential supply of the swirl chamber 22 makes it possible to put the product in rotation in the cylindrical part of said chamber, the product is then pressed and rotated through the upstream end 26 along the side surface 25 of said conical part, forming a web of product whose rotational speed increases and which converges towards the downstream end 27, then said web convergent can impact itself by escaping through the dispensing orifice 23 to form the aerosol.
  • the lateral surface has at least one stepped portion 33 provided with a level 36 or a plurality of levels 36.
  • level is understood to mean a transverse surface, in particular orthogonal to the distribution axis D of the chamber 22. , located between the base and the top of the conical part.
  • the stepped portions 33 have the shape of a staircase, the levels 36 of which form the steps.
  • the stepped portions 33 extend here from the upstream end 26 to the downstream end 27 of the conical part, and have a width which decreases in proportion to the diameter of the conical part between the upstream and downstream ends.
  • the conical part 31 of the chamber 22 comprises four stepped portions 33 arranged periodically and symmetrically on the conical side surface 25, two stepped portions 33 being opposite each other.
  • the stepped portions 33 are separated by continuous portions 37 of the side surface 25.
  • the continuous portions 37 overhang the levels 36 of the stepped portions 33 to form raised edges on either side of each stepped portion 33.
  • the layers of product impact the edges by rotating in the chamber along the conical surface 25. Thanks to these edges, the turbulence in the moving product is further increased, to obtain finer droplets of product of uniform size.
  • the stepped portions 33 have a width which decreases in proportion to the diameter of the conical portion 31 between the upstream end 26 and the downstream end 27.
  • each supply channel 24 has a U-shaped section which is delimited between an outer wall 28 and an inner wall 29.
  • outer 28 and inner 29 walls are orthogonal to the upstream end 26.
  • the outer wall 28 is tangent to the cylindrical side surface 34 and the inner wall 29 is offset from it, for example by a distance of less than 30 % of the internal dimension of the upstream end 26, so as to avoid impaction of the product in said upstream end.
  • the inner wall 29 advantageously has an angle of convergence with the outer wall 28 in the upstream-downstream direction, the offset between said walls then being measured at the level of the unblocking section of the channels 24 in the upstream end 26.
  • the inner wall 29 has a convergence angle less than or equal to 10 ° .
  • the inner wall is further connected to the cylindrical surface 34 of the chamber by a rounded corner 38, which preferably has a radius of less than 0.1mm.
  • the downstream end of the supply channel 24 or all of the downstream ends of each of the supply channels 24 form a supply section of the vortex chamber 22.
  • this feed section can be small relative to the internal surface of the upstream end 26.
  • the surface of the feed section can be less than 10% of the interior surface of the upstream end 26.
  • the surface of the supply section may be between 0.01 mm2 and 0.03 mm2.
  • the internal dimension of the upstream end 26 is 0.5 mm, or an internal surface of 0.2 mm2, and each channel 24 has a width of 0.12 mm and a depth of 0, 13 mm, i.e. an area of 0.016 mm2 for the supply section.
  • the downstream end 27 of the swirl chamber is surmounted by a distribution orifice 23 having a cylindrical geometry of revolution about the distribution axis D, the internal dimension of said orifice being equal to the internal dimension of the downstream end 27.
  • the axial dimension of the dispensing orifice 23 is small compared to its internal dimension, so as not to disturb the convergence of the swirling sheet.
  • the axial dimension of the dispensing orifice 23 may be less than 50% of its internal dimension.
  • the downstream end 27 of the swirl chamber 22 can form a dispensing orifice 23. The production of the aerosol is particularly satisfactory when the internal dimension of the downstream end 27 is small relative to the internal dimension of the.
  • the internal dimension of the downstream end 27 may be less than 50% of the internal dimension of the upstream end 26, more precisely being between 20% and 40% of said internal dimension.
  • the axial dimension of the swirl chamber 22 is relatively large, in particular of the order of or greater than the internal dimension of the upstream end 26, so as to allow the establishment of the swirling sheet along the lateral surfaces 25, 34 of said vortex chamber 22 and to impart progressive convergence.
  • the axial dimension of the swirl chamber 22 is at least equal to 80% of the internal dimension of the upstream end 26, more precisely being between 90% and 200% of said internal dimension.
  • the internal dimension of the cylindrical part is 0.6 mm, the upstream end 26 being 0.5 mm, and the internal dimension of the downstream end 27 is less than or equal to 0.14 mm.
  • axial of the swirl chamber 22 is at least equal to 0.45 mm, knowing that the axial dimension of the conical part is 0.32 mm and the cylindrical part is 0.13 mm.
  • the axial dimension of the dispensing orifice 23 is less than 0.10mm, and the internal dimension is 0.14mm.
  • the second embodiment of the invention is a nozzle 42 similar to the nozzle of the first embodiment, except that the conical part 41 of the chamber 42 is only partially stepped.
  • the conical lateral surface 45 comprises stepped portions 43 which extend over a reduced part of the lateral surface along the distribution axis.
  • the stepped portions 43 are disposed towards the downstream portion 46.
  • the stepped portions 43 have dimensions which go substantially from the middle of the conical part 41 of the chamber 42 to its downstream end 47. Between the end. upstream 46 and the middle of the conical portion 41, the side surface 45 is continuous.
  • the other characteristics of this nozzle are the same as those of the nozzle of the first embodiment.
  • the chamber 42 comprises in particular a cylindrical part 40 at the upstream end 46 of the conical part 41, and into which opening at least one supply channel 44.
  • the stepped portion or portions may have variable dimensions, and arranged for example on one third, one quarter, two thirds or three quarters of the lateral surface along the distribution axis.
  • an axis of the dispensing orifice 23 forms with the dispensing axis D, a predetermined angle A. This angle is different from zero. This makes it possible to compensate for a pressure imbalance in the vortex chamber or to obtain a more or less arcuate or even flat spray.
  • the conical portion 31 of the nozzle comprises a stepped portion 33 which extends over the entire lateral surface 25. More precisely, the stepped portion 33 forms around the distribution axis D, a complete revolution.
  • the invention also relates to an assembly comprising a nozzle and an anvil.
  • a front vortex chamber located between the distal wall 17 of the anvil and the proximal wall 35 of the conical portion, this vortex chamber being cylindrical in shape.
  • Supply channels 24 open into said front vortex chamber, the latter opening into the vortex chamber 22 of the nozzle.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)

Description

L'invention concerne une buse de pulvérisation pour réceptacle, notamment pour un système de distribution d'un produit sous pression muni d'un bouton poussoir. L'invention se rapporte également à un système de distribution comprenant une telle buse.The invention relates to a spray nozzle for a receptacle, in particular for a system for dispensing a product under pressure provided with a push button. The invention also relates to a distribution system comprising such a nozzle.

Dans une application particulière, le système de distribution est destiné à équiper des flacons utilisés en parfumerie, en cosmétique ou pour des traitements pharmaceutiques. En effet, ce type de flacon contient un produit qui est restitué par le système de distribution comprenant un dispositif de prélèvement sous pression dudit produit, ledit système étant actionné par exemple par un bouton poussoir pour permettre la pulvérisation du produit. En général, le dispositif de prélèvement comprend une pompe ou une valve à actionnement manuel, par exemple par l'intermédiaire du bouton poussoir.In a particular application, the distribution system is intended to equip bottles used in perfumery, cosmetics or for pharmaceutical treatments. In fact, this type of bottle contains a product which is returned by the distribution system comprising a device for withdrawing said product under pressure, said system being actuated for example by a push button to allow the product to be sprayed. In general, the sampling device comprises a pump or a manually actuated valve, for example by means of the push button.

De tels boutons poussoirs sont classiquement réalisés en au moins deux parties, dont un corps d'actionnement et une buse de pulvérisation qui sont assemblés l'un à l'autre. La buse comprend généralement une chambre tourbillonnaire pourvue d'un orifice de distribution, ainsi qu'au moins un canal d'alimentation de ladite chambre.Such push buttons are conventionally made in at least two parts, including an actuating body and a spray nozzle which are assembled to one another. The nozzle generally comprises a swirl chamber provided with a dispensing orifice, as well as at least one supply channel for said chamber.

Le dispositif de prélèvement prélève le produit du flacon par un tube, et le pousse sous pression à l'intérieur du conduit aménagé dans le poussoir, qui est l'élément d'actionnement du dispositif de prélèvement. Ce conduit débouche dans une chambre dite tourbillonnaire destinée à faire tourner très rapidement le liquide et donc à lui donner de la vitesse et les effets de la force centrifuge. Cette chambre tourbillonnaire est prolongée en son centre par un orifice de sortie par lequel le produit s'échappe à l'extérieur avec une forte vitesse. Mû par cette vitesse, et soumis aux forces centrifuges, le liquide se fractionne en gouttelettes et forme un aérosol. La taille des gouttelettes issues de la chambre tourbillonnaire dépend en partie de la force et de la vitesse avec laquelle l'utilisateur actionne la pompe en appuyant sur le bouton poussoir avec son doigt, car la pression induite en dépend.The sampling device withdraws the product from the vial through a tube, and pushes it under pressure inside the conduit arranged in the pusher, which is the actuating element of the sampling device. This conduit opens into a so-called vortex chamber intended to make the liquid turn very quickly and therefore to give it speed and the effects of centrifugal force. This vortex chamber is extended at its center by an outlet orifice through which the product escapes to the outside at high speed. Driven by this speed, and subjected to centrifugal forces, the liquid splits into droplets and forms an aerosol. The size of the droplets from the vortex chamber depends in part on the force and speed with which the user operates the pump by pressing the push button with his finger, since the pressure induced depends on it.

Afin d'assurer une bonne uniformité de la taille desdites gouttelettes, une technologie consiste à utiliser une chambre tourbillonnaire conique. Ainsi, le flot tourne dans la chambre sous forme de nappe qui s'impacte sur elle-même après sa sortie par l'orifice de distribution.In order to ensure good uniformity of the size of said droplets, one technology consists in using a conical vortex chamber. Thus, the flow turns in the chamber in the form of a sheet which impacts itself after its exit through the distribution orifice.

Le document FR2952360 montre un exemple d'une telle chambre tourbillonnaire conique. Ici, les canaux d'alimentation débouchent tangentiellement dans la chambre tourbillonnaire, qui est cylindrique de révolution pour faire tourner très rapidement le produit. De plus, l'orifice de distribution présente un diamètre réduit par rapport à celui de ladite chambre afin que le produit en rotation s'échappe par ledit orifice en s'impactant sur lui-même avec une vitesse suffisante pour se fractionner en gouttelettes formant l'aérosol.The document FR2952360 shows an example of such a conical vortex chamber. Here, the feed channels open out tangentially into the swirl chamber, which is cylindrical in revolution to make the product turn very quickly. In addition, the dispensing orifice has a reduced diameter compared to that of said chamber so that the rotating product escapes through said orifice by impacting itself with a speed sufficient to split into droplets forming the 'aerosol.

Des chambres tourbillonnaires similaires sont également connues des documents WO 03/061839A1 , US3129893A , US4989790A .Similar vortex chambers are also known from documents WO 03 / 061839A1 , US3129893A , US4989790A .

Cependant, cette technologie a une efficacité limitée aux fluides dont la viscosité est proche de celle de l'eau. Lorsque les produits à pulvériser ont des viscosités supérieures, allant par exemple jusqu'à 50 ou 100 fois celle de l'eau, l'impaction est faible et la restitution se fait sous forme d'un spray à cône creux ou d'un jet. Ainsi, on n'obtient pas de gouttelettes de la taille souhaitée.However, this technology has limited effectiveness to fluids whose viscosity is close to that of water. When the products to be sprayed have higher viscosities, for example going up to 50 or 100 times that of water, the impaction is low and the restitution is in the form of a hollow cone spray or a jet . Thus, droplets of the desired size are not obtained.

L'invention a pour but de résoudre ce problème et vise à fournir une buse de pulvérisation pour un système de distribution capable de pulvériser des produits dont la viscosité est supérieure à celle de l'eau, de manière à obtenir des gouttelettes conformes à la taille désirée pour des flacons de parfumerie, de cosmétique ou de traitements pharmaceutiques.The object of the invention is to solve this problem and aims to provide a spray nozzle for a dispensing system capable of spraying products whose viscosity is greater than that of water, so as to obtain droplets conforming to the size. desired for perfume, cosmetic or pharmaceutical treatment bottles.

A cette fin, l'invention concerne une buse de pulvérisation, notamment pour un système de distribution d'un produit sous pression muni d'un bouton poussoir, la buse comprenant un orifice de distribution et une chambre tourbillonnaire débouchant sur l'orifice de distribution, la chambre comportant une partie conique délimitée par une surface latérale conique, ladite surface latérale conique étant convergente depuis une extrémité amont vers une extrémité aval d'alimentation de l'orifice de distribution, la buse comprenant en outre au moins un canal d'alimentation de ladite chambre tourbillonnaire, le ou les canaux d'alimentation débouchant à l'extrémité amont de la partie conique, la surface latérale conique présentant au moins une portion étagée munie d'un niveau ou d'une pluralité de niveaux, et elle comprend au moins une portion continue, c'est-à-dire sans niveaux, la ou les portions continues surplombent la ou les portions étagées adjacentes.To this end, the invention relates to a spray nozzle, in particular for a system for dispensing a pressurized product provided with a push button, the nozzle comprising a dispensing orifice and a swirl chamber opening onto the dispensing orifice. , the chamber comprising a conical part delimited by a conical lateral surface, said lateral surface conical being convergent from an upstream end towards a downstream supply end of the dispensing orifice, the nozzle further comprising at least one supply channel of said swirl chamber, the supply channel or channels opening out at the end upstream of the conical part, the conical side surface having at least one stepped portion provided with a level or a plurality of levels, and it comprises at least one continuous portion, that is to say without levels, the or the continuous portions overhang the adjacent stepped portion (s).

Les portions étagées favorisent une impaction plus importante de la nappe sur elle-même, et ainsi la formation de gouttelettes suffisamment fines. En effet, lorsque le fluide tourne sous forme de nappe laminaire à la surface de la partie conique et s'approche de l'orifice de sortie, la nappe saute d'un étage à l'autre entre deux niveaux, ce qui provoque une turbulence de son flux. Ainsi, on arrive à créer une turbulence notable malgré la viscosité du produit.The staged portions promote greater impaction of the web on itself, and thus the formation of sufficiently fine droplets. Indeed, when the fluid turns in the form of a laminar sheet on the surface of the conical part and approaches the outlet orifice, the sheet jumps from one stage to another between two levels, which causes turbulence. of its flow. Thus, it is possible to create significant turbulence despite the viscosity of the product.

Selon différents modes de réalisation de l'invention, qui pourront être pris ensemble ou séparément :

  • la ou les portions étagées s'étendent de l'extrémité amont à l'extrémité aval de la surface latérale conique,
  • la ou les portions étagées s'étendent sur une partie réduite de la surface latérale conique,
  • la surface latérale conique présente une géométrie conique de révolution autour d'un axe de distribution,
  • les niveaux sont orthogonaux à l'axe de distribution,
  • la ou les portions étagées ont une forme d'escalier dont les niveaux forment des marches,
  • la ou les portions étagées ont une largeur qui diminue proportionnellement au diamètre de la partie conique entre l'extrémité amont et l'extrémité aval,
  • les portions étagées sont séparées par une portion continue
  • les portions étagées sont situées entre une base et un sommet de la partie coniques et à distance de la base et du sommet,
  • la surface latérale conique comprend plusieurs portions étagées disposées sur la surface latérale,
  • les portions étagées sont disposées de manière symétrique,
  • les portions étagées sont disposées périodiquement sur la surface latérale conique,
  • la surface latérale conique comprend quatre portions étagées, deux portions étagées étant en vis-vis,
  • les canaux d'alimentation s'étendent dans un plan transversal à la surface latérale conique,
  • la chambre comprend une partie cylindrique agencée à l'extrémité amont de la partie conique,
  • la partie cylindrique est définie par une surface latérale cylindrique,
  • la partie cylindrique a un diamètre au moins égal au diamètre de l'extrémité amont,
  • l'extrémité aval du ou des canaux d'alimentation débouche tangentiellement dans la partie cylindrique de la chambre,
  • le ou les canaux d'alimentation sont délimités entre une paroi extérieure et une paroi intérieure,
  • la paroi extérieure est tangente à la surface latérale cylindrique de la partie cylindrique,
  • les parois extérieure et intérieure sont orthogonales à l'extrémité amont,
  • la paroi intérieure est convergente vers la paroi extérieure en direction de l'extrémité aval du canal,
  • la paroi intérieure forme un angle de 10° avec la paroi extérieure,
  • la paroi intérieure est raccordée à la surface cylindrique de la chambre par un coin arrondi,
  • le coin arrondi présente un rayon inférieur à 0,1 mm,
  • ledit orifice de distribution présente une géométrie cylindrique dont la dimension interne est égale à la dimension interne de l'extrémité aval,
  • la dimension axiale de la chambre tourbillonnaire est au moins égale à 80% de la dimension interne de l'extrémité amont,
  • la dimension axiale de la chambre tourbillonnaire est comprise entre 90% et 200% de la dimension interne de l'extrémité amont,
  • la dimension axiale de la partie conique est d'au moins 50% de la dimension axiale de la chambre tourbillonnaire, de préférence 70%, voire 80%,
  • la dimension interne de l'extrémité aval est inférieure à 50% de la dimension interne de l'extrémité amont,
  • la dimension interne de l'extrémité aval est comprise entre 20% et 40% de la dimension interne de l'extrémité amont,
  • la dimension interne de l'extrémité aval est inférieure ou égale à 0,24 mm,
  • la dimension axiale de l'orifice de distribution est inférieure à 50% de la dimension interne dudit orifice,
  • l'extrémité aval du canal d'alimentation ou l'ensemble des extrémités aval de chacun des canaux d'alimentation forme une section d'alimentation de la chambre tourbillonnaire, la surface de ladite section étant inférieure à 10% de la surface intérieure de l'extrémité amont,
  • la surface de la section d'alimentation de la chambre tourbillonnaire est comprise entre 0,01 mm2 et 0,03 mm2,
  • la buse présente au moins deux canaux d'alimentation de la chambre tourbillonnaire, lesdits canaux étant disposés symétriquement par rapport à l'axe de distribution,
  • la buse présente une paroi proximale dans laquelle est formée une empreinte de la chambre tourbillonnaire et du ou des canaux d'alimentation.
According to different embodiments of the invention, which can be taken together or separately:
  • the stepped portion or portions extend from the upstream end to the downstream end of the conical side surface,
  • the stepped portion or portions extend over a reduced portion of the conical side surface,
  • the conical lateral surface has a conical geometry of revolution about a distribution axis,
  • the levels are orthogonal to the distribution axis,
  • the stepped portion (s) have the shape of a staircase, the levels of which form steps,
  • the stepped portion or portions have a width which decreases in proportion to the diameter of the conical portion between the upstream end and the downstream end,
  • tiered portions are separated by a continuous portion
  • the stepped portions are located between a base and a top of the conical part and at a distance from the base and the top,
  • the conical side surface comprises several stepped portions arranged on the side surface,
  • the stepped portions are arranged symmetrically,
  • the stepped portions are periodically arranged on the conical side surface,
  • the conical side surface comprises four stepped portions, two stepped portions being opposite,
  • the feed channels extend in a plane transverse to the conical side surface,
  • the chamber comprises a cylindrical part arranged at the upstream end of the conical part,
  • the cylindrical part is defined by a cylindrical side surface,
  • the cylindrical part has a diameter at least equal to the diameter of the upstream end,
  • the downstream end of the supply channel (s) emerges tangentially into the cylindrical part of the chamber,
  • the supply channel or channels are delimited between an outer wall and an inner wall,
  • the outer wall is tangent to the cylindrical side surface of the cylindrical part,
  • the outer and inner walls are orthogonal to the upstream end,
  • the inner wall converges towards the outer wall in the direction of the downstream end of the channel,
  • the inner wall forms an angle of 10 ° with the outer wall,
  • the inner wall is connected to the cylindrical surface of the chamber by a rounded corner,
  • the rounded corner has a radius of less than 0.1 mm,
  • said dispensing orifice has a cylindrical geometry, the internal dimension of which is equal to the internal dimension of the downstream end,
  • the axial dimension of the swirl chamber is at least equal to 80% of the internal dimension of the upstream end,
  • the axial dimension of the swirl chamber is between 90% and 200% of the internal dimension of the upstream end,
  • the axial dimension of the conical part is at least 50% of the axial dimension of the vortex chamber, preferably 70%, or even 80%,
  • the internal dimension of the downstream end is less than 50% of the internal dimension of the upstream end,
  • the internal dimension of the downstream end is between 20% and 40% of the internal dimension of the upstream end,
  • the internal dimension of the downstream end is less than or equal to 0.24 mm,
  • the axial dimension of the dispensing orifice is less than 50% of the internal dimension of said orifice,
  • the downstream end of the supply channel or all of the downstream ends of each of the supply channels form a supply section of the swirl chamber, the area of said section being less than 10% of the interior surface of the 'upstream end,
  • the area of the supply section of the swirl chamber is between 0.01 mm 2 and 0.03 mm 2 ,
  • the nozzle has at least two supply channels for the swirl chamber, said channels being arranged symmetrically with respect to the distribution axis,
  • the nozzle has a proximal wall in which an imprint of the vortex chamber and of the supply channel or channels is formed.

L'invention concerne également un ensemble buse-enclume avec une buse telle que précédemment décrite.The invention also relates to a nozzle-anvil assembly with a nozzle as described above.

L'invention se rapporte également à un système de distribution d'un produit sous pression pour un réceptacle, notamment un flacon de produit cosmétique, le système comprenant une telle buse de pulvérisation. Le système de distribution comprend, de préférence, un bouton poussoir agencé pour porter la buse de pulvérisation.The invention also relates to a system for dispensing a product under pressure for a receptacle, in particular a bottle of product. cosmetic, the system comprising such a spray nozzle. The dispensing system preferably comprises a push button arranged to carry the spray nozzle.

L'invention sera mieux comprise à la lumière de la description suivante qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter, accompagnée des dessins joints :

  • la figure 1 illustrant de façon schématique, une vue en coupe du haut d'un récipient muni d'un système de distribution selon un premier mode de réalisation de l'invention,
  • la figure 2 illustrant de façon schématique, une vue en coupe agrandie d'un bouton poussoir du système de distribution de la figure 1,
  • la figure 3 illustrant de façon schématique, une vue de l'intérieur d'une buse d'un système de distribution selon le mode de réalisation de la figure 1,
  • la figure 4 illustrant de façon schématique, une vue en perspective agrandie de la chambre tourbillonnaire de la buse du mode de réalisation de la figure 1,
  • la figure 5 illustrant de façon schématique, une vue en coupe transversale de la buse du mode de réalisation de la figure 1,
  • la figure 6 illustrant de façon schématique, une vue en coupe transversale d'une buse selon un deuxième mode de réalisation de l'invention,
  • la figure 7 est une vue en coupe transversale de la buse selon un quatrième mode de réalisation qui ne fait pas partie de la présente invention,
  • la figure 8 est une vue en perspective d'une buse, selon le quatrième mode de réalisation, coupée selon un plan axial,
  • la figure 9 est une vue en perspective d'une buse, selon le quatrième mode de réalisation, dont une partie a été coupée.
The invention will be better understood in the light of the following description which is given only as an indication and which is not intended to limit it, accompanied by the accompanying drawings:
  • the figure 1 schematically illustrating a top sectional view of a container provided with a dispensing system according to a first embodiment of the invention,
  • the figure 2 schematically illustrating an enlarged sectional view of a push button of the dispensing system of the figure 1 ,
  • the figure 3 schematically illustrating a view of the interior of a nozzle of a dispensing system according to the embodiment of the figure 1 ,
  • the figure 4 schematically illustrating an enlarged perspective view of the vortex chamber of the nozzle of the embodiment of the figure 1 ,
  • the figure 5 schematically illustrating a cross-sectional view of the nozzle of the embodiment of the figure 1 ,
  • the figure 6 schematically illustrating a cross-sectional view of a nozzle according to a second embodiment of the invention,
  • the figure 7 is a cross-sectional view of the nozzle according to a fourth embodiment which does not form part of the present invention,
  • the figure 8 is a perspective view of a nozzle, according to the fourth embodiment, cut along an axial plane,
  • the figure 9 is a perspective view of a nozzle, according to the fourth embodiment, part of which has been cut.

Sur la figure 1, est représenté un flacon de produit cosmétique comprenant un système de distribution d'un produit sous pression selon un premier mode de réalisation. Le système de distribution est doté d'un bouton poussoir. Le bouton poussoir comprend un corps 1 présentant une jupe annulaire 2 qui entoure un puits 3 de montage du bouton poussoir sur un tube d'amenée 4 du produit sous pression. Par ailleurs, le bouton poussoir comprend une zone supérieure 5 permettant à l'utilisateur d'exercer un appui digital sur ledit bouton poussoir afin de pouvoir le déplacer axialement.On the figure 1 , there is shown a cosmetic product bottle comprising a system for dispensing a product under pressure according to a first embodiment. The dispensing system has a push button. The push button comprises a body 1 having an annular skirt 2 which surrounds a well 3 for mounting the push button on a supply tube 4 for the product under pressure. Furthermore, the push button comprises an upper zone 5 allowing the user to exert a digital pressure on said push button in order to be able to move it axially.

Le système de distribution comprend un dispositif de prélèvement 6 équipé d'un tube 4 d'amenée du produit sous pression qui est inséré de façon étanche dans le puits 3. De façon connue, le système de distribution comprend par ailleurs des moyens de montage 7 sur un flacon 8 contenant le produit et des moyens de prélèvement 9 du produit à l'intérieur dudit flacon qui sont agencés pour alimenter le tube d'amenée 4 en produit sous pression. Le dispositif de prélèvement 6 comprend ici une pompe à actionnement manuel ou, dans le cas où le produit est conditionné sous pression dans le flacon 8, une valve à actionnement manuel. Ainsi, lors d'un déplacement manuel du bouton poussoir, la pompe ou la valve est actionnée pour alimenter le tube d'amenée 4 en produit sous pression. Les moyens de montage 7 comprennent par exemple une bague de fixation et une frette de décoration pour cacher la bague et le tube d'amenée 4.The distribution system comprises a sampling device 6 equipped with a tube 4 for supplying the product under pressure which is inserted in a sealed manner into the well 3. In a known manner, the distribution system also comprises mounting means 7. on a bottle 8 containing the product and means 9 for sampling the product inside said bottle which are arranged to supply the supply tube 4 with product under pressure. The sampling device 6 here comprises a manually actuated pump or, in the case where the product is packaged under pressure in the bottle 8, a manually actuated valve. Thus, during a manual movement of the push button, the pump or the valve is actuated to supply the supply tube 4 with product under pressure. The mounting means 7 comprise, for example, a fixing ring and a decorative hoop to hide the ring and the supply tube 4.

Comme le montre la figure 2, le corps 1 présente également un logement annulaire 10 qui est en communication avec le puits 3. Dans le mode de réalisation représenté, le logement 10 est d'axe perpendiculaire à celui du puits de montage 3 pour permettre une pulvérisation latérale du produit relativement au corps 1 du bouton poussoir. En variante non représentée, le logement 10 peut être colinéaire au puits 3, notamment pour un bouton poussoir formant embout nasal de pulvérisation.As shown in the figure 2 , the body 1 also has an annular housing 10 which is in communication with the well 3. In the embodiment shown, the housing 10 has an axis perpendicular to that of the mounting well 3 to allow lateral spraying of the product relative to the shaft. push button body 1. In a variant not shown, the housing 10 can be collinear with the well 3, in particular for a push button forming a nasal spray nozzle.

Le logement 10 est pourvu d'une enclume 11 autour de laquelle une buse 12 de pulvérisation est montée de sorte à former un chemin de distribution du produit sous pression entre ledit logement et une chambre tourbillonnaire. Pour ce faire, l'enclume 11 s'étend depuis le fond du logement 10 en laissant un canal 13 de communication entre le puits 3 et ledit logement.The housing 10 is provided with an anvil 11 around which a spray nozzle 12 is mounted so as to form a path for distributing the product under pressure between said housing and a swirl chamber. To do this, the anvil 11 extends from the bottom of the housing 10, leaving a communication channel 13 between the well 3 and said housing.

Dans le mode de réalisation représenté, le chemin de distribution présente successivement en communication d'amont en aval : un conduit annulaire amont 18 en communication avec le canal 13, ledit conduit tubulaire 18 étant formé entre la face interne de la paroi latérale 14 de la buse 12 et la face externe de la paroi latérale de l'enclume 11 qui est disposée en regard ; un conduit annulaire aval 21 formé entre la paroi proximale 15 de la buse 12 et la paroi distale 17 de l'enclume 11. Du coté aval, le chemin de distribution alimente en produit sous pression la chambre tourbillonnaire 22, pourvue d'au moins un canal 24 d'alimentation de ladite chambre. Plus précisément, dans le mode de réalisation représenté, les canaux 24 d'alimentation communiquent avec le conduit annulaire aval 21. Dans le mode de réalisation représenté, la buse présente deux canaux 24 d'alimentation de la chambre tourbillonnaire 22, lesdits canaux étant disposés symétriquement par rapport à l'axe de distribution D. En variante, plus de deux canaux 24 d'alimentation peuvent être prévus, notamment trois canaux 24 disposés symétriquement par rapport à l'axe de distribution D, ou un seul canal 24 peut être prévu pour alimenter la chambre tourbillonnaire 22.In the embodiment shown, the distribution path has successively in communication from upstream to downstream: an upstream annular duct 18 in communication with the channel 13, said tubular duct 18 being formed between the internal face of the side wall 14 of the nozzle 12 and the outer face of the side wall of the anvil 11 which is arranged opposite; a downstream annular duct 21 formed between the proximal wall 15 of the nozzle 12 and the distal wall 17 of the anvil 11. On the downstream side, the distribution path supplies the swirl chamber 22 with product under pressure, provided with at least one channel 24 for supplying said chamber. More precisely, in the embodiment shown, the supply channels 24 communicate with the downstream annular duct 21. In the embodiment shown, the nozzle has two channels 24 for supplying the vortex chamber 22, said channels being arranged. symmetrically with respect to the distribution axis D. As a variant, more than two supply channels 24 may be provided, in particular three channels 24 arranged symmetrically with respect to the distribution axis D, or a single channel 24 may be provided to supply the vortex chamber 22.

L'association de la buse 12 dans le logement 10 est réalisée par emmanchement de la face externe de la paroi latérale 14, le bord arrière de ladite face externe étant en outre pourvu d'une saillie radiale 16 d'ancrage de la buse 12 dans ledit logement. Par ailleurs, une empreinte de la chambre tourbillonnaire est formée en creux dans la paroi proximale 15 et l'enclume 11 présente une paroi distale 17 plane sur laquelle la paroi proximale 15 de la buse 12 est en appui pour délimiter entre elles l'ensemble tourbillonnaire. La buse 12 est en outre dotée d'un orifice de distribution 23 par lequel le produit est pulvérisé.The association of the nozzle 12 in the housing 10 is produced by fitting the outer face of the side wall 14, the rear edge of said outer face being further provided with a radial projection 16 for anchoring the nozzle 12 in said housing. Furthermore, an imprint of the swirl chamber is formed recessed in the proximal wall 15 and the anvil 11 has a flat distal wall 17 on which the proximal wall 15 of the nozzle 12 rests to delimit the swirl assembly between them. . The nozzle 12 is furthermore provided with a dispensing orifice 23 through which the product is sprayed.

De façon avantageuse, la buse 12 et le corps 1 sont réalisés par moulage, notamment d'un matériau thermoplastique différent. En outre, le matériau formant la buse 12 présente une rigidité qui est supérieure à la rigidité du matériau formant le corps 1. Ainsi, la raideur importante de la buse 12 permet d'éviter sa déformation lors de son montage dans le logement 10 de sorte à garantir la géométrie de la chambre tourbillonnaire. En outre, la raideur moins importante du corps 1 permet une étanchéité améliorée entre le puits 3 de montage et le tube d'amenée 4. Dans un exemple de réalisation, le corps 1 est réalisé en polyoléfine et la buse 12 est réalisée en copolymère cyclo oléfinique (COC), en poly(oxyméthylène) ou en poly(butylène téréphtalate).Advantageously, the nozzle 12 and the body 1 are made by molding, in particular from a different thermoplastic material. In addition, the material forming the nozzle 12 has a rigidity which is greater than the rigidity of the material forming the body 1. Thus, the significant stiffness of the nozzle 12 makes it possible to avoid its deformation during its assembly in the housing 10 so to guarantee the geometry of the swirl chamber. In addition, the lower stiffness of the body 1 allows improved sealing between the mounting well 3 and the supply tube 4. In an exemplary embodiment, the body 1 is made of polyolefin and the nozzle 12 is made of cycloolefinic copolymer (COC), poly (oxymethylene) or poly (butylene terephthalate).

Dans le mode de réalisation représenté sur les figures 3 à 5, la chambre tourbillonnaire 22 comprend une partie cylindrique 30 dans laquelle débouche tangentiellement l'extrémité aval des canaux 24 d'alimentation, la partie cylindrique étant délimitée par une surface latérale 34 cylindrique de révolution, qui est fermée vers l'avant par une paroi proximale 35. La chambre tourbillonnaire 22 comprend de plus une partie conique 31 en aval de la partie cylindrique 30.La partie conique 31 est délimitée par une surface latérale 25 qui s'étend suivant un axe de distribution D, les canaux de distribution 24 s'étendant dans un plan transversal par rapport audit axe de distribution D. On définit une partie conique comme étant une zone dans laquelle une première extrémité ou base de la partie conique 31 présente en coupe selon un plan orthogonal à l'axe de distribution, une section dont la surface est supérieure à celle d'une seconde extrémité ou sommet de la partie conique 31. Les première et seconde extrémités sont reliées par une ligne génératrice qui n'est pas nécessairement un segment de droite, mais qui pourra au contraire être une courbe ayant au moins un palier. Ainsi la base et/ou le sommet de la partie conique pourront être de formes diverses, notamment circulaires, polygonales, elliptiques ou autres. Dans la description, les termes de positionnement dans l'espace sont définis par rapport à l'axe de distribution D. Dans le mode de réalisation représenté, la surface latérale 25 est de révolution autour de l'axe de distribution D. La surface latérale 25 est convergente depuis une extrémité amont 26 vers une extrémité aval 27 d'alimentation de l'orifice de distribution 23. En outre, l'orifice de distribution 23 présente une dimension de sortie qui est égale à la dimension interne de l'extrémité aval 27.In the embodiment shown in figures 3 to 5 , the swirl chamber 22 comprises a cylindrical part 30 into which the downstream end of the supply channels 24 emerges tangentially, the cylindrical part being delimited by a lateral cylindrical surface 34 of revolution, which is closed towards the front by a proximal wall 35. The swirl chamber 22 further comprises a conical part 31 downstream of the cylindrical part 30. The conical part 31 is delimited by a lateral surface 25 which extends along a distribution axis D, the distribution channels 24 s' extending in a plane transverse to said distribution axis D. A conical part is defined as being a zone in which a first end or base of the conical part 31 presents in section along a plane orthogonal to the distribution axis, a section the surface of which is greater than that of a second end or apex of the conical part 31. The first and second ends are connected by a generating line which is not necessarily a line segment, but which could on the contrary be a curve having at least one plateau. Thus the base and / or the top of the conical part can be of various shapes, in particular circular, polygonal, elliptical or others. In the description, the terms of positioning in space are defined with respect to the distribution axis D. In the embodiment shown, the lateral surface 25 is of revolution about the distribution axis D. The lateral surface 25 is convergent from an upstream end 26 to a downstream end 27 for supplying the dispensing orifice 23. Further, the dispensing orifice 23 has an outlet dimension which is equal to the internal dimension of the downstream end. 27.

Ainsi, lors de la distribution du produit sous pression, l'alimentation tangentielle de la chambre tourbillonnaire 22 permet de mettre le produit en rotation dans partie cylindrique de ladite chambre, le produit est ensuite plaqué et poussé en rotation à travers l'extrémité amont 26 le long de la surface latérale 25 de ladite partie conique en formant une nappe de produit dont la vitesse de rotation augmente et qui converge vers l'extrémité aval 27, puis ladite nappe convergente peut s'impacter sur elle-même en s'échappant par l'orifice de distribution 23 pour former l'aérosol.Thus, during the distribution of the product under pressure, the tangential supply of the swirl chamber 22 makes it possible to put the product in rotation in the cylindrical part of said chamber, the product is then pressed and rotated through the upstream end 26 along the side surface 25 of said conical part, forming a web of product whose rotational speed increases and which converges towards the downstream end 27, then said web convergent can impact itself by escaping through the dispensing orifice 23 to form the aerosol.

Selon l'invention, la surface latérale présente au moins une portion étagée 33 munie d'un niveau 36 ou d'une pluralité de niveaux 36. On entend par niveau une surface transversale notamment orthogonale à l'axe de distribution D de la chambre 22, situé entre la base et le sommet de la partie conique.. Ainsi, les portions étagées 33 ont une forme d'escalier dont les niveaux 36 forment les marches. Les portions étagées 33 s'étendent ici de l'extrémité amont 26 à l'extrémité aval 27 de la partie conique, et ont une largeur qui diminue proportionnellement au diamètre de la partie conique entre les extrémités amont et aval. Dans le mode de réalisation des figures 3 à 5, la partie conique 31 de la chambre 22 comprend quatre portions étagées 33 disposées périodiquement et symétriquement sur la surface latérale 25 conique, deux portions étagées 33 étant en vis-vis. Les portions étagées 33 sont séparées par des portions continues 37 de la surface latérale 25. Les portions continues 37 surplombent les niveaux 36 des portions étagées 33 pour former des rebords rehaussés de part et d'autre de chaque portion étagée 33. Ainsi, les nappes de produit impactent les rebords en tournant dans la chambre le long de la surface conique 25. Grâce à ces rebords, on augmente encore les turbulences dans le produit en mouvement, pour obtenir des gouttelettes de produit plus fines et de tailles uniformes. De plus, les portions étagées 33 ont une largeur qui diminue proportionnellement au diamètre de la partie conique 31 entre l'extrémité amont 26 et l'extrémité aval 27.According to the invention, the lateral surface has at least one stepped portion 33 provided with a level 36 or a plurality of levels 36. The term “level” is understood to mean a transverse surface, in particular orthogonal to the distribution axis D of the chamber 22. , located between the base and the top of the conical part. Thus, the stepped portions 33 have the shape of a staircase, the levels 36 of which form the steps. The stepped portions 33 extend here from the upstream end 26 to the downstream end 27 of the conical part, and have a width which decreases in proportion to the diameter of the conical part between the upstream and downstream ends. In the embodiment of figures 3 to 5 , the conical part 31 of the chamber 22 comprises four stepped portions 33 arranged periodically and symmetrically on the conical side surface 25, two stepped portions 33 being opposite each other. The stepped portions 33 are separated by continuous portions 37 of the side surface 25. The continuous portions 37 overhang the levels 36 of the stepped portions 33 to form raised edges on either side of each stepped portion 33. Thus, the layers of product impact the edges by rotating in the chamber along the conical surface 25. Thanks to these edges, the turbulence in the moving product is further increased, to obtain finer droplets of product of uniform size. In addition, the stepped portions 33 have a width which decreases in proportion to the diameter of the conical portion 31 between the upstream end 26 and the downstream end 27.

Par ailleurs, pour alimenter tangentiellement la chambre tourbillonnaire 22 en faisant tourner le produit le long de ses surfaces latérales 25, 34 chaque canal d'alimentation 24 présente une section en U qui est délimitée entre une paroi extérieure 28 et une paroi intérieure 29. Les parois extérieure 28 et intérieure 29 sont orthogonales à l'extrémité amont 26. En outre, la paroi extérieure 28 est tangente à la surface latérale cylindrique 34 et la paroi intérieure 29 est décalée d'elle, par exemple d'une distance inférieure à 30% de la dimension interne de l'extrémité amont 26, de sorte à éviter une impaction du produit dans ladite extrémité amont. Dans le mode de réalisation représenté, la paroi intérieure 29 présente avantageusement un angle de convergence avec la paroi extérieure 28 dans le sens amont-aval, le décalage entre lesdites parois étant alors mesuré au niveau de la section de débouchage des canaux 24 dans l'extrémité amont 26. De préférence, la paroi intérieure 29 présente un angle de convergence inférieur ou égal à 10°. La paroi intérieure est de plus raccordée à la surface cylindrique 34 de la chambre par un coin arrondi 38, qui présente de préférence un rayon inférieur à 0,1mm.Furthermore, in order to supply the swirl chamber 22 tangentially by rotating the product along its side surfaces 25, 34, each supply channel 24 has a U-shaped section which is delimited between an outer wall 28 and an inner wall 29. outer 28 and inner 29 walls are orthogonal to the upstream end 26. In addition, the outer wall 28 is tangent to the cylindrical side surface 34 and the inner wall 29 is offset from it, for example by a distance of less than 30 % of the internal dimension of the upstream end 26, so as to avoid impaction of the product in said upstream end. In the embodiment shown, the inner wall 29 advantageously has an angle of convergence with the outer wall 28 in the upstream-downstream direction, the offset between said walls then being measured at the level of the unblocking section of the channels 24 in the upstream end 26. Preferably, the inner wall 29 has a convergence angle less than or equal to 10 ° . The inner wall is further connected to the cylindrical surface 34 of the chamber by a rounded corner 38, which preferably has a radius of less than 0.1mm.

Par ailleurs, l'extrémité aval du canal 24 d'alimentation ou l'ensemble des extrémités aval de chacun des canaux 24 d'alimentation forme une section d'alimentation de la chambre tourbillonnaire 22. Pour augmenter la durée de distribution d'une dose de produit sur la course d'actionnement du bouton poussoir, on peut prévoir que cette section d'alimentation soit faible relativement à la surface intérieure de l'extrémité amont 26. En particulier, la surface de la section d'alimentation peut être inférieure à 10% de la surface intérieure de l'extrémité amont 26. De façon préférentielle, la surface de la section d'alimentation peut être comprise entre 0,01 mm2 et 0,03 mm2. Dans un exemple de réalisation, la dimension interne de l'extrémité amont 26 est de 0,5 mm, soit une surface intérieure de 0,2 mm2, et chaque canal 24 présente une largeur de 0,12 mm et une profondeur de 0,13 mm, soit une surface de 0,016 mm2 pour la section d'alimentation.Furthermore, the downstream end of the supply channel 24 or all of the downstream ends of each of the supply channels 24 form a supply section of the vortex chamber 22. To increase the duration of dispensing a dose of product on the actuation stroke of the push button, provision can be made for this feed section to be small relative to the internal surface of the upstream end 26. In particular, the surface of the feed section can be less than 10% of the interior surface of the upstream end 26. Preferably, the surface of the supply section may be between 0.01 mm2 and 0.03 mm2. In an exemplary embodiment, the internal dimension of the upstream end 26 is 0.5 mm, or an internal surface of 0.2 mm2, and each channel 24 has a width of 0.12 mm and a depth of 0, 13 mm, i.e. an area of 0.016 mm2 for the supply section.

Dans le mode de réalisation représenté, l'extrémité aval 27 de la chambre tourbillonnaire est surmontée par un orifice de distribution 23 présentant une géométrie cylindrique de révolution autour de l'axe de distribution D, la dimension interne dudit orifice étant égale à la dimension interne de l'extrémité aval 27. De façon avantageuse, la dimension axiale de l'orifice de distribution 23 est faible par rapport à sa dimension interne, de sorte à ne pas perturber la convergence de la nappe tourbillonnante. En particulier, la dimension axiale de l'orifice de distribution 23 peut être inférieure à 50% de sa dimension interne. En variante non représentée, l'extrémité aval 27 de la chambre tourbillonnaire 22 peut former orifice de distribution 23. La réalisation de l'aérosol est particulièrement satisfaisante lorsque la dimension interne de l'extrémité aval 27 est faible relativement à la dimension interne de l'extrémité amont 26, de sorte que l'impaction de la nappe soit réalisée au plus près de l'orifice de distribution 23. En particulier, la dimension interne de l'extrémité aval 27 peut être inférieure à 50% de la dimension interne de l'extrémité amont 26, plus précisément en étant comprise entre 20% et 40% de ladite dimension interne.In the embodiment shown, the downstream end 27 of the swirl chamber is surmounted by a distribution orifice 23 having a cylindrical geometry of revolution about the distribution axis D, the internal dimension of said orifice being equal to the internal dimension of the downstream end 27. Advantageously, the axial dimension of the dispensing orifice 23 is small compared to its internal dimension, so as not to disturb the convergence of the swirling sheet. In particular, the axial dimension of the dispensing orifice 23 may be less than 50% of its internal dimension. In a variant not shown, the downstream end 27 of the swirl chamber 22 can form a dispensing orifice 23. The production of the aerosol is particularly satisfactory when the internal dimension of the downstream end 27 is small relative to the internal dimension of the. 'upstream end 26, so that the impaction of the web is carried out as close as possible to the dispensing orifice 23. In in particular, the internal dimension of the downstream end 27 may be less than 50% of the internal dimension of the upstream end 26, more precisely being between 20% and 40% of said internal dimension.

De façon préférentielle, la dimension axiale de la chambre tourbillonnaire 22 est relativement importante, notamment de l'ordre ou supérieure à la dimension interne de l'extrémité amont 26, de sorte à permettre l'établissement de la nappe tourbillonnante le long des surfaces latérale 25, 34 de ladite chambre tourbillonnaire 22 et à conférer une convergence progressive. En particulier, la dimension axiale de la chambre tourbillonnaire 22 est au moins égale à 80% de la dimension interne de l'extrémité amont 26, plus précisément en étant comprise entre 90% et 200% de ladite dimension interne.Preferably, the axial dimension of the swirl chamber 22 is relatively large, in particular of the order of or greater than the internal dimension of the upstream end 26, so as to allow the establishment of the swirling sheet along the lateral surfaces 25, 34 of said vortex chamber 22 and to impart progressive convergence. In particular, the axial dimension of the swirl chamber 22 is at least equal to 80% of the internal dimension of the upstream end 26, more precisely being between 90% and 200% of said internal dimension.

Selon une réalisation particulière, la dimension interne de la partie cylindrique est de 0.6mm, l'extrémité amont 26 étant de 0,5 mm, et la dimension interne de l'extrémité aval 27 est inférieure ou égale à 0,14 mm La dimension axiale de la chambre tourbillonnaire 22 est au moins égale à 0,45 mm, sachant que la dimension axiale de la partie conique est de 0.32 mm et la partie cylindrique de 0,13mm. La dimension axiale de l'orifice de distribution 23 est inférieure à 0,10 mm, et la dimension interne est de 0,14mm.According to a particular embodiment, the internal dimension of the cylindrical part is 0.6 mm, the upstream end 26 being 0.5 mm, and the internal dimension of the downstream end 27 is less than or equal to 0.14 mm. axial of the swirl chamber 22 is at least equal to 0.45 mm, knowing that the axial dimension of the conical part is 0.32 mm and the cylindrical part is 0.13 mm. The axial dimension of the dispensing orifice 23 is less than 0.10mm, and the internal dimension is 0.14mm.

Sur la figure 6, le deuxième mode de réalisation de l'invention est une buse 42 semblable à la buse du premier mode de réalisation, excepté le fait que la partie conique 41 de la chambre 42 n'est que partiellement étagée. Dans ce cas, la surface latérale conique 45 comprend des portions étagées 43 qui s'étendent sur une partie réduite de la surface latérale selon l'axe de distribution. De préférence, les portions étagées 43 sont disposées vers la portion aval 46. Ici, les portions étagées 43 ont des dimensions qui vont sensiblement du milieu de la partie conique 41 de la chambre 42 jusqu'à son extrémité aval 47. Entre l'extrémité amont 46 et le milieu de la partie conique 41, la surface latérale 45 est continue. Les autres caractéristiques de cette buse sont les mêmes que celles de la buse du premier mode de réalisation. La chambre 42 comprend notamment une partie cylindrique 40 à l'extrémité amont 46 de la partie conique 41, et dans laquelle débouchant au moins un canal d'alimentation 44.On the figure 6 , the second embodiment of the invention is a nozzle 42 similar to the nozzle of the first embodiment, except that the conical part 41 of the chamber 42 is only partially stepped. In this case, the conical lateral surface 45 comprises stepped portions 43 which extend over a reduced part of the lateral surface along the distribution axis. Preferably, the stepped portions 43 are disposed towards the downstream portion 46. Here, the stepped portions 43 have dimensions which go substantially from the middle of the conical part 41 of the chamber 42 to its downstream end 47. Between the end. upstream 46 and the middle of the conical portion 41, the side surface 45 is continuous. The other characteristics of this nozzle are the same as those of the nozzle of the first embodiment. The chamber 42 comprises in particular a cylindrical part 40 at the upstream end 46 of the conical part 41, and into which opening at least one supply channel 44.

Selon différentes variantes du deuxième mode de réalisation, la ou les portions étagées pourront avoir des dimensions variables, et disposées par exemple sur le tiers, le quart, les deux tiers ou les trois-quarts de la surface latérale selon l'axe de distribution.According to different variants of the second embodiment, the stepped portion or portions may have variable dimensions, and arranged for example on one third, one quarter, two thirds or three quarters of the lateral surface along the distribution axis.

Selon un troisième mode de réalisation, un axe de l'orifice de distribution 23 forme avec l'axe de distribution D, un angle A prédéterminé. Cet angle est différent de zéro. Ceci permet de compenser un déséquilibre de pression dans la chambre tourbillonnaire ou bien d'obtenir une pulvérisation de forme plus ou moins arquée voir plate.According to a third embodiment, an axis of the dispensing orifice 23 forms with the dispensing axis D, a predetermined angle A. This angle is different from zero. This makes it possible to compensate for a pressure imbalance in the vortex chamber or to obtain a more or less arcuate or even flat spray.

Selon un quatrième mode de réalisation, qui ne fait pas partie de la présente invention et est représenté sur les figures 7 à 9, la partie 31 conique de la buse comporte une portion étagée 33 qui s'étend sur toute la surface latérale 25. De manière plus précise, la portion étagée 33 forme autour de l'axe de distribution D, une révolution complète.According to a fourth embodiment, which does not form part of the present invention and is shown in the figures 7 to 9 , the conical portion 31 of the nozzle comprises a stepped portion 33 which extends over the entire lateral surface 25. More precisely, the stepped portion 33 forms around the distribution axis D, a complete revolution.

L'invention se rapporte également à un ensemble comprenant une buse et une enclume. Une chambre tourbillonnaire avant située entre la paroi distale 17 de l'enclume et de la paroi proximale 35 de la partie conique, cette chambre tourbillonnaire étant de forme cylindrique. Des canaux 24 d'alimentation débouchent dans ladite chambre tourbillonnaire avant, cette dernière débouchant dans la chambre tourbillonnaire 22 de la buse.The invention also relates to an assembly comprising a nozzle and an anvil. A front vortex chamber located between the distal wall 17 of the anvil and the proximal wall 35 of the conical portion, this vortex chamber being cylindrical in shape. Supply channels 24 open into said front vortex chamber, the latter opening into the vortex chamber 22 of the nozzle.

Ces modes de réalisation permettent donc l'utilisation d'une chambre tourbillonnaire pour un produit visqueux. L'impaction de la nappe tourbillonnante sur les portions étagées permet notamment la réalisation d'un aérosol formé d'une répartition spatiale uniforme de gouttelettes en suspension dans l'air, la taille desdites gouttelettes étant petite et uniforme. En particulier, l'aérosol peut présenter alors l'aspect d'un panache de fumée avec des tailles de gouttelettes comprises entre 10 µm et 60 µm avec une moyenne de 35 µm, et ce quelle que soit la force d'appui que l'utilisateur exerce sur le bouton poussoir, en particulier dans le cas d'une pompe à pointeau.These embodiments therefore allow the use of a vortex chamber for a viscous product. The impaction of the swirling sheet on the stepped portions makes it possible in particular to produce an aerosol formed from a uniform spatial distribution of droplets suspended in the air, the size of said droplets being small and uniform. In particular, the aerosol can then have the appearance of a plume of smoke with droplet sizes of between 10 μm and 60 μm with an average of 35 μm, and this regardless of the support force that the user exerts on the push button, in particular in the case of a needle pump.

Claims (14)

  1. Spray nozzle, in particular for a dispensing system of a pressurised fluid provided with a pushbutton, the nozzle (12, 42) comprising a dispensing orifice (23) and a vortex chamber (22, 42) leading to the dispensing orifice (23), the chamber comprising a conic portion (31, 41) delimited by a conic side surface (25, 45), said conic side surface being convergent from an upstream end (26, 46) to a downstream end (27, 47) for supplying the dispensing orifice (23), the nozzle further comprising at least one supply channel (24, 44) of said vortex chamber, the supply channel(s) (24, 44) leading to the upstream end (26, 46) of the conic portion (31, 41), the side surface (25, 45) having at least one staged portion (33, 43) provided with a level (36) or a plurality of levels (36), the nozzle being characterised in that it comprises at least one continuous portion (37), the continuous portion(s) (37) overhanging the adjacent staged portion(s) (33).
  2. Nozzle according to claim 1, wherein the staged portion(s) (33) extend substantially from the upstream end (26) to the downstream end (27) of the conic portion (31).
  3. Nozzle according to one of the preceding claims, wherein the staged portions are separated by a continuous portion (37).
  4. Nozzle according to any one of the preceding claims, wherein the conic side surface (25) comprises several staged portions (33) disposed symmetrically on the conic side surface (25).
  5. Nozzle according to any one of the preceding claims, wherein the supply channels (24) extend into a plane transversal to the conic side surface (25).
  6. Nozzle according to any one of the preceding claims, wherein the chamber (22) comprises a cylindrical portion (30) arranged at the upstream end (26) of the conic portion (31), the cylindrical portion (30) being defined by a cylindrical side surface (34).
  7. Nozzle according to claim 6, wherein the downstream end of the supply channel(s) (24) leads tangentially into the cylindrical portion (30).
  8. Nozzle according to claim 7, wherein the supply channel(s) (24) comprise an inner wall (29) and an outer wall (28), the outer wall (28) being tangent to the cylindrical side surface (34).
  9. Nozzle according to claim 8, wherein the inner wall (29) is convergent to the outer wall (28) in the direction of the downstream end of the channel.
  10. Nozzle according to any one of the preceding claims, wherein the axial dimension of the vortex chamber (22) is at least equal to 80% of the inner dimension of the upstream end (26).
  11. Nozzle according to any one of the preceding claims, wherein the axial dimension of the conic portion (31) is at least 50% of the axial dimension of the vortex chamber (22), preferably 70%, even 80%.
  12. Nozzle according to any one of the preceding claims, wherein the conic side surface has a conic geometry of revolution about a dispensing axis D and wherein an axis of the dispensing orifice (23) forms with the dispensing axis D, a predetermined angle different from zero.
  13. Dispensing system of a pressurised fluid, comprising a spray nozzle (12) according to any one of the preceding claims.
  14. Dispensing system according to claim 13, comprising a pushbutton, the nozzle (12) being arranged on the pushbutton.
EP17165610.1A 2016-04-14 2017-04-07 Spray nozzle, in particular for a system for dispensing a pressurized fluid provided with a pushbutton, and dispensing system comprising such a nozzle Active EP3231516B1 (en)

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FR1653320A FR3050125B1 (en) 2016-04-14 2016-04-14 SPRAY NOZZLE, ESPECIALLY FOR A PRESSURE PRODUCT DISTRIBUTION SYSTEM EQUIPPED WITH A PUSH BUTTON, AND DISTRIBUTION SYSTEM INCLUDING SUCH A NOZZLE

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EP3231516B1 true EP3231516B1 (en) 2021-06-02

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US (1) US10717092B2 (en)
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JP (1) JP6941964B2 (en)
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Publication number Publication date
JP2017190188A (en) 2017-10-19
CN107297288B (en) 2024-04-19
FR3050125B1 (en) 2021-12-17
US20170297042A1 (en) 2017-10-19
KR102361964B1 (en) 2022-02-11
US10717092B2 (en) 2020-07-21
KR20170117885A (en) 2017-10-24
BR102017007921A2 (en) 2017-10-17
FR3050125A1 (en) 2017-10-20
CN107297288A (en) 2017-10-27
BR102017007921B1 (en) 2022-02-08
EP3231516A1 (en) 2017-10-18
JP6941964B2 (en) 2021-09-29

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