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EP2892655B1 - Spray head for a fluid and dispenser comprising such a spray head - Google Patents

Spray head for a fluid and dispenser comprising such a spray head Download PDF

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Publication number
EP2892655B1
EP2892655B1 EP13774715.0A EP13774715A EP2892655B1 EP 2892655 B1 EP2892655 B1 EP 2892655B1 EP 13774715 A EP13774715 A EP 13774715A EP 2892655 B1 EP2892655 B1 EP 2892655B1
Authority
EP
European Patent Office
Prior art keywords
spray head
swirl
wall
swirl chamber
head according
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
EP13774715.0A
Other languages
German (de)
French (fr)
Other versions
EP2892655A1 (en
Inventor
Florent Pouliaude
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.)
Aptar France SAS
Original Assignee
Aptar France SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aptar France SAS filed Critical Aptar France SAS
Publication of EP2892655A1 publication Critical patent/EP2892655A1/en
Application granted granted Critical
Publication of EP2892655B1 publication Critical patent/EP2892655B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • 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
    • 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
    • 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
    • B05B11/1009—Piston pumps actuated by a lever
    • B05B11/1011—Piston pumps actuated by a lever without substantial movement of the nozzle in the direction of the pressure stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • 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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/16—Actuating means
    • B65D83/20—Actuator caps
    • 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

Definitions

  • the present invention relates to a fluid spray head comprising a spray orifice defining a distribution axis, a swirl chamber upstream of the spray orifice, the chamber being delimited by internal walls, and swirling channels defining respectively channel outlets which open transversely to the distribution axis in the swirl chamber at the inner walls so as to generate a swirling flow within the swirl chamber, each channel defining a projection axis which extends into the swirl chamber from the channel outlet.
  • a spray head may for example be in the form of a pusher operable with one or more finger (s) of a hand.
  • the preferred fields of application of the present invention are those of perfumery, cosmetics or pharmacy, without excluding other areas.
  • FR-2 399 282 discloses a conventional spray head comprising a dispensing orifice, a swirl chamber and swirl channels that open tangentially and transversely into the swirl chamber.
  • the swirl channels extend in a plane that is perpendicular to the distribution axis defined by the spray orifice.
  • the flows of fluid from the swirling channels enter the swirl chamber along the bottom wall of the chamber.
  • they also run along the cylindrical side wall of the chamber as they open tangentially into the swirl chamber.
  • the flows of fluid product run along both the bottom wall and the side wall of the swirl chamber, thus generating a loss of considerable load. Parasitic and uncontrolled flow phenomena are also generated.
  • FR-2 399 282 discloses yet another embodiment in which the swirl channels are formed in a frustoconical surface and open tangentially into the bottom wall of the swirl chamber which defines a frusto-conical side wall whose open top forms the spray orifice. More specifically, a nozzle, forming the spray orifice and the frustoconical wall, is engaged around a pin forming the bottom wall and a frustoconical surface in which the swirl channels are formed.
  • the fluid product streams from the swirling channels enter the swirl chamber along the frustoconical wall of the swirl chamber towards the spray orifice.
  • the fact that the flows along the frustoconical internal wall of the chamber generates a considerable pressure drop and uncontrolled parasitic flow phenomena.
  • the sputtering chamber is responsible for a significant loss of pressure and the generation of fluid phenomena that affect the quality of the spray through the spray orifice .
  • the present invention aims to overcome the aforementioned drawbacks of the prior art found in most dispensing heads provided with a chamber and swirling channels.
  • the present invention proposes that the Y-axis of the swirling channels move away from both the bottom wall and the peripheral sidewall which are both adjacent to the channel outlets so as to pass through the chamber. without swirling neither the bottom wall nor the peripheral side wall.
  • the fluid product streams from the swirl channel outlets are no longer subject to parasitic laminar flow phenomena along the inner walls of the swirl chamber.
  • the vortex flow of the fluid product can thus be produce without being significantly disturbed by the internal walls of the swirl chamber.
  • the vortex flow is mainly generated away from the inner walls of the vortex chamber.
  • the pressure drop at the swirl chamber is thus considerably reduced, which makes it possible to implement swirl channels having a reduced cross section. Indeed, the pressure loss already created by the swirl channels of reduced section will be only slightly increased at the level of the swirl chamber of the invention.
  • the channel outlets open into the swirl chamber at the point where the bottom wall connects to the peripheral side wall.
  • the flows of fluid product from the outlets of the swirling channels penetrate into the swirl chamber substantially symmetrically with respect to the side and bottom walls, which considerably reduces parasitic turbulence.
  • the bottom wall is substantially flat, channel outlets opening into the swirl chamber at the bottom wall.
  • the chamber comprises a front wall in which the spray orifice is formed, the projection axes being directed towards this front wall.
  • the peripheral side wall is substantially cylindrical.
  • the bottom and front walls can be parallel and flat.
  • the bottom wall may be concave or convex, as is the front wall.
  • the peripheral side wall may be slightly frustoconical.
  • the axes of projection of the swirl channels extending transversely with respect to the bottom wall and the side wall, preferably with an angle of about 45 ° with respect to the wall bottom and with respect to the side wall. This implies that the projection axes from the canals extend into the chamber away from both the bottom wall and the side wall, and advantageously perfectly symmetrical.
  • the swirling channels are formed in a frustoconical wall having an axis of revolution coincident with the distribution axis.
  • the swirl channels can lead into the swirl chamber with an oblique orientation, both with respect to the bottom wall which is advantageously perpendicular to the distribution axis, and with respect to the side wall which is advantageously cylindrical.
  • the outlets of the swirl channels are advantageously formed in the bottom wall directly adjacent to the cylindrical side wall. Thanks to their oblique disposition coming from the frustoconical wall, the flows of fluid product penetrate into the swirl chamber away from both the bottom wall and the side wall, in the direction of the front wall where is formed l spray orifice.
  • the spray head comprises a head body and a nozzle, the head body forming a pin defining the bottom wall and the frustoconical wall, the nozzle being engaged around the pin defining between them the swirl chamber and the swirl channels, the nozzle defining the front wall and the side wall, and a frustoconical zone which comes into sealing contact with the frustoconical wall of the spindle to form the swirl channels, the nozzle advantageously having a symmetry of revolution around the axis of distribution.
  • the channel outlets open non-tangentially into the swirl chamber. In this way, it is furthermore avoided that fluid streams from the swirl channel outlets flow along the side wall of the swirl chamber.
  • the swirl chamber may have a thickness E in the direction of the distribution axis and a diameter D in the direction perpendicular to the distribution axis, the ratio E / D being less than about 0.8, E being advantageously less than about 0.5 mm.
  • the swirl channels are rectilinear.
  • the pressure drops are minimized, particularly when the channels have a reduced section.
  • the invention also defines a fluid dispenser comprising a reservoir, a pump mounted on the reservoir and a spray head as defined above associated with the pump.
  • the dispensing head can be attached to an outlet of the pump or integrated into the pump.
  • the spray head is in the form of a pusher attached to the free end of the actuating rod of the pump.
  • the spirit of the invention lies in the fact of moving the fluid product streams coming from the swirling channels from the internal walls of the swirl chamber in order to reduce the pressure losses and to minimize parasitic laminar flow phenomena. Fluid flows from the swirling channels obviously enter the swirl chamber at one of its internal walls, but the flows are oriented such that they immediately move away from these internal walls.
  • the spray head of the present invention may be operated at the outlet of any fluid dispenser device, such as a pump, a valve, a collapsible reservoir, etc.
  • the spray head of the invention will find a preferred application as a manually operable pusher with one or more finger (s).
  • This pusher may be integrated with a pump or a valve, or preferably attached to the free end of an actuating rod forming an internal outlet duct.
  • the actuating rod is provided with a piston that slides sealingly inside a barrel formed in a pump body which is fixedly mounted on the opening of the pump. 'a reservoir.
  • the pump conventionally comprises a pump chamber provided with an inlet valve, and an outlet valve which can be carried by the actuating rod.
  • the volume of the pump chamber decreases, thereby putting the fluid contained therein under pressure.
  • the outlet valve opens and the fluid under pressure is forced through the actuating rod to reach the pusher incorporating a spray head according to the invention.
  • the spray head according to a non-limiting embodiment of the invention comprises a head body 1 which can be made by injection molding of suitable plastic material.
  • the head body 1 can be made in one piece. It conventionally comprises a connection sleeve intended to be attached to the free end of the actuating rod of a pump or a valve.
  • This connecting sleeve is connected to a housing 10 by a series of ducts and internal channels.
  • the housing 10 is preferably cylindrical and opens laterally on the periphery of the head body.
  • the housing 10 contains a pin 11 which protrudes outwardly of the housing. Thus, an annular space is formed inside the housing 10 around the spindle 11.
  • a nozzle 2 is attached and fixedly inserted inside the housing 10 around the spindle 11, as can be seen on the figure 3 .
  • a series of internal conduits is defined between the pin 11 and the nozzle 2 to convey the fluid product from the connection sleeve to a spray orifice 21 formed by the nozzle 2.
  • the spray head can still be provided with a trim band which aesthetically envelops the head body 1 leaving the nozzle 2 apparent.
  • the housing 10 and the spindle 11 which it contains can be seen in a greatly enlarged manner.
  • the housing 10, in this embodiment, has a substantially cylindrical circular configuration.
  • the spindle 11 it is disposed substantially centrally inside the housing 10 and has an oblong cross section with two rounded sectors 111 and two flats 112.
  • the front face of the spindle 11 which faces outwards housing 10 has a complex structure which will now be described. Referring again to the figure 2 it can be seen that this front face is mainly defined by a frustoconical wall 14 whose axis of revolution coincides with the axis of the spindle and the distribution axis X, as will be seen below.
  • the frustoconical wall 14 is truncated on its outer periphery, but also in its center so as to define a bottom wall 12, which is here substantially planar and perpendicular to the axis of revolution of the frustoconical wall 14.
  • the frustoconical wall 14 is formed with two grooves or grooves 13 'which extend from the flats 112 in the frustoconical wall 14 to the bottom wall 12 in which they open out forming channel outlets 131. It may be noted that the grooves or grooves 13 'reach the level of the bottom wall 12 non-tangentially.
  • a common duct 17 connects the housing 10 to a well forming the connection sleeve.
  • the nozzle 2 preferably has a symmetry of revolution about the distribution axis X passing through the spray orifice 21. Thus, it It is not necessary to orient the nozzle 2 when it is inserted into the housing 10 of the head body 1.
  • the spray orifice 21 is formed at the same level a distribution wall 22 of reduced thickness.
  • the spray orifice 21 is in the form of a perfectly or substantially cylindrical bore which passes through the thickness of the distribution wall 22.
  • the nozzle forms a diffusion cone 23 which promotes the formation of 'a good quality spray.
  • the distribution wall 22 forms a front wall 24 which may be perfectly or substantially flat, or slightly concave, convex or frustoconical.
  • the front wall 24 is interrupted at its center by the spray orifice 21.
  • the nozzle 2 also forms a peripheral lateral wall 25 which may have a cylindrical configuration around the distribution axis X.
  • the side wall 25 it is also possible to realize the side wall 25 with a frustoconical configuration, or complex.
  • the nozzle 2 forms a zone or frustoconical section 26 having a solid angle identical to that of the frustoconical wall 14 of the spindle 11.
  • this frustoconical zone or section 26 can come into intimate sealed contact.
  • swirling channels 13 open at the level of the channel outlets 131 in a substantially cylindrical volume defined between the bottom wall 12 of the spindle 11, the front wall 24 and the side wall 25 of the nozzle 2.
  • This internal volume constitutes a chamber of swirling 20 whose input is defined by the channel outputs 131 and the output is defined by the spray orifice 21.
  • the channel outputs 113 are not directly tangent to the side wall 25, but slightly shifted inwards of the swirl chamber 20.
  • This chamber may have a thickness E in the direction of the distribution axis X of the order of 0.5 mm and a diameter D in the direction perpendicular to the distribution axis X of the order of 0.7 mm.
  • E / D ratio is preferably less than about 0.8.
  • the two projection axes Y extend into the chamber 20 from the bottom wall substantially at the level where it comes into contact with the cylindrical wall 25.
  • the two projection axes Y extend in the chamber of swirl 20 at an angle of the order of 45 ° with respect to the bottom wall 12 and with respect to the side wall 25.
  • the flow of fluid which penetrates inside the swirl chamber 20 moves away immediately and progressively from the bottom walls 12 and laterals 20 and approaches the front wall 24 where is formed the spray orifice 21.
  • fluid flows from the swirling channels 13 will generate a swirl or vortex fluid within the chamber before passing through the spray orifice 21.
  • the bottom wall 12 and the side wall 25 can be made with various configurations, provided that the flows of fluid that penetrate the swirl chamber 20 along the Y axes do not follow the walls.
  • the purpose of the present invention is to avoid any laminar flow along the internal walls of the swirl chamber 20.
  • swirl channels 13 By forming the swirl channels 13 in a frustoconical wall, these are oriented obliquely to the distribution axis X, so that the flows of fluid that penetrate the swirl chamber 20 do not run along any of these internal walls, since the bottom wall 12 is substantially or generally perpendicular to the X axis and that the side wall 25 is generally or substantially cylindrical.
  • the spindle 11 and the nozzle 2 Upstream of the swirling channels 13, the spindle 11 and the nozzle 2 form two respective supply channels 15 and a common annular channel 16 which communicates even further upstream with the common conduit 17 visible on the figure 2 .
  • the supply channels 15 are here formed between the flats 112 of the spindle 11 and the inner wall 27 of the nozzle 2.
  • the nozzle 2 For its fixed and sealed retention inside the housing 10, the nozzle 2 comprises sealed hooking means 28 in the form of projecting profiles allowing a tight grip inside the housing 10.
  • each channel 13 is supplied perfectly independently by respective clean ducts.
  • a spray head is obtained with reduced pressure drop and without parasitic laminar effect.

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

Description

La présente invention concerne une tête de pulvérisation de produit fluide comprenant un orifice de pulvérisation définissant un axe de distribution, une chambre de tourbillonnement en amont de l'orifice de pulvérisation, la chambre étant délimitée par des parois internes, et des canaux de tourbillonnement définissant respectivement des sorties de canal qui débouchent transversalement à l'axe de distribution dans la chambre de tourbillonnement au niveau des parois internes de manière à générer un écoulement tourbillonnaire à l'intérieur de la chambre de tourbillonnement, chaque canal définissant un axe de projection qui s'étend dans la chambre de tourbillonnement à partir de la sortie de canal. Une telle tête de pulvérisation peut par exemple se présenter sous la forme d'un poussoir actionnable à l'aide d'un ou de plusieurs doigt(s) d'une main. Les domaines privilégiés d'application de la présente invention sont ceux de la parfumerie, de la cosmétique ou encore de la pharmacie, sans exclure d'autres domaines.The present invention relates to a fluid spray head comprising a spray orifice defining a distribution axis, a swirl chamber upstream of the spray orifice, the chamber being delimited by internal walls, and swirling channels defining respectively channel outlets which open transversely to the distribution axis in the swirl chamber at the inner walls so as to generate a swirling flow within the swirl chamber, each channel defining a projection axis which extends into the swirl chamber from the channel outlet. Such a spray head may for example be in the form of a pusher operable with one or more finger (s) of a hand. The preferred fields of application of the present invention are those of perfumery, cosmetics or pharmacy, without excluding other areas.

Dans l'art antérieur, on connaît le document FR-2 399 282 qui décrit une tête de pulvérisation conventionnelle comprenant un orifice de distribution, une chambre de tourbillonnement et des canaux de tourbillonnement qui débouchent tangentiellement et transversalement dans la chambre de tourbillonnement. De manière classique, les canaux de tourbillonnement s'étendent dans un plan qui est perpendiculaire à l'axe de distribution défini par l'orifice de pulvérisation. De ce fait, les flux de produit fluide issus des canaux de tourbillonnement pénètrent dans la chambre de tourbillonnement en longeant la paroi de fond de la chambre. De plus, ils longent également la paroi latérale cylindrique de la chambre étant donné qu'ils débouchent tangentiellement dans la chambre de tourbillonnement. Ainsi, les flux de produit fluide longent à la fois la paroi de fond et la paroi latérale de la chambre de tourbillonnement, générant ainsi une perte de charge considérable. Des phénomènes d'écoulement parasites et incontrôlés sont également générés.In the prior art, the document is known FR-2 399 282 which discloses a conventional spray head comprising a dispensing orifice, a swirl chamber and swirl channels that open tangentially and transversely into the swirl chamber. Typically, the swirl channels extend in a plane that is perpendicular to the distribution axis defined by the spray orifice. As a result, the flows of fluid from the swirling channels enter the swirl chamber along the bottom wall of the chamber. In addition, they also run along the cylindrical side wall of the chamber as they open tangentially into the swirl chamber. Thus, the flows of fluid product run along both the bottom wall and the side wall of the swirl chamber, thus generating a loss of considerable load. Parasitic and uncontrolled flow phenomena are also generated.

Ce document FR-2 399 282 décrit encore un autre mode de réalisation dans lequel les canaux de tourbillonnement sont formés dans une surface tronconique et débouchent tangentiellement dans la paroi de fond de la chambre de tourbillonnement qui définit une paroi latérale tronconique dont le sommet ouvert forme l'orifice de pulvérisation. Plus précisément, un gicleur, formant l'orifice de pulvérisation et la paroi tronconique, est engagé autour d'une broche formant la paroi de fond et une surface tronconique dans laquelle les canaux de tourbillonnement sont formés. Ainsi, les flux de produit fluide issus des canaux de tourbillonnement pénètrent dans la chambre de tourbillonnement en longeant la paroi tronconique de la chambre de tourbillonnement en direction de l'orifice de pulvérisation. Là encore, le fait que les flux longent la paroi interne tronconique de la chambre génère une perte de charge considérable et des phénomènes d'écoulement parasites incontrôlés.This document FR-2 399 282 discloses yet another embodiment in which the swirl channels are formed in a frustoconical surface and open tangentially into the bottom wall of the swirl chamber which defines a frusto-conical side wall whose open top forms the spray orifice. More specifically, a nozzle, forming the spray orifice and the frustoconical wall, is engaged around a pin forming the bottom wall and a frustoconical surface in which the swirl channels are formed. Thus, the fluid product streams from the swirling channels enter the swirl chamber along the frustoconical wall of the swirl chamber towards the spray orifice. Again, the fact that the flows along the frustoconical internal wall of the chamber generates a considerable pressure drop and uncontrolled parasitic flow phenomena.

Dans ces deux modes de réalisation du document FR-2 399 282 , qui décrit une tête de pulvérisation selon le préambule de la revendication 1, chambre de pulvérisation est responsable d'une perte de charge importante et de la génération de phénomènes fluidiques qui nuisent à la bonne qualité de la pulvérisation à travers l'orifice de pulvérisation.In these two embodiments of the document FR-2 399 282 , which describes a spray head according to the preamble of claim 1, the sputtering chamber is responsible for a significant loss of pressure and the generation of fluid phenomena that affect the quality of the spray through the spray orifice .

La présente invention a pour but de remédier aux inconvénients précités de l'art antérieur que l'on retrouve dans la plupart des têtes de distribution pourvues d'une chambre et de canaux de tourbillonnement.The present invention aims to overcome the aforementioned drawbacks of the prior art found in most dispensing heads provided with a chamber and swirling channels.

Pour ce faire, la présente invention propose que les axes de projection Y des canaux de tourbillonnement s'éloignent à la fois de la paroi de fond et de la paroi latérale périphérique qui sont toutes deux adjacentes aux sorties de canal de manière à traverser la chambre de tourbillonnement sans longer ni la paroi de fond, ni la paroi latérale périphérique.To do this, the present invention proposes that the Y-axis of the swirling channels move away from both the bottom wall and the peripheral sidewall which are both adjacent to the channel outlets so as to pass through the chamber. without swirling neither the bottom wall nor the peripheral side wall.

De cette manière, les flux de produit fluide issus des sorties de canaux de tourbillonnement ne sont plus sujets à des phénomènes d'écoulement laminaires parasites le long des parois internes de la chambre de tourbillonnement. L'écoulement tourbillonnaire du produit fluide peut ainsi se produire sans être perturbé de manière significative par les parois internes de la chambre de tourbillonnement. En d'autres termes, l'écoulement tourbillonnaire est principalement généré en éloignement des parois internes de la chambre de tourbillonnement. La perte de charge au niveau de la chambre de tourbillonnement est ainsi considérablement réduite, ce qui permet de mettre en oeuvre des canaux de tourbillonnement présentant une section réduite. En effet, la perte de charge déjà créée par les canaux de tourbillonnement de section réduite ne sera que faiblement augmentée au niveau de la chambre de tourbillonnement de l'invention. D'autre part, il faut noter que les sorties de canal débouchent dans la chambre de tourbillonnement à l'endroit où la paroi de fond se raccorde à la paroi latérale périphérique. Ainsi, les flux de produit fluide issus des sorties des canaux de tourbillonnement pénètrent dans la chambre de tourbillonnement de manière sensiblement symétrique par rapport aux parois latérale et de fond, ce qui réduit considérablement les turbulences parasites.In this way, the fluid product streams from the swirl channel outlets are no longer subject to parasitic laminar flow phenomena along the inner walls of the swirl chamber. The vortex flow of the fluid product can thus be produce without being significantly disturbed by the internal walls of the swirl chamber. In other words, the vortex flow is mainly generated away from the inner walls of the vortex chamber. The pressure drop at the swirl chamber is thus considerably reduced, which makes it possible to implement swirl channels having a reduced cross section. Indeed, the pressure loss already created by the swirl channels of reduced section will be only slightly increased at the level of the swirl chamber of the invention. On the other hand, it should be noted that the channel outlets open into the swirl chamber at the point where the bottom wall connects to the peripheral side wall. Thus, the flows of fluid product from the outlets of the swirling channels penetrate into the swirl chamber substantially symmetrically with respect to the side and bottom walls, which considerably reduces parasitic turbulence.

Selon une caractéristiques avantageuse de l'invention, la paroi de fond est sensiblement plane, les sorties de canal débouchant dans la chambre de tourbillonnement au niveau de la paroi de fond.According to an advantageous characteristic of the invention, the bottom wall is substantially flat, channel outlets opening into the swirl chamber at the bottom wall.

Selon une autre caractéristique intéressante de l'invention, la chambre comprend une paroi avant dans laquelle est formé l'orifice de pulvérisation, les axes de projection étant dirigés vers cette paroi avant.According to another advantageous characteristic of the invention, the chamber comprises a front wall in which the spray orifice is formed, the projection axes being directed towards this front wall.

Selon encore un autre aspect de l'invention, la paroi latérale périphérique est sensiblement cylindrique. Les parois de fond et avant peuvent être parallèles et planes. En variante, la paroi de fond peut être concave ou convexe, de même que la paroi avant. La paroi latérale périphérique peut être légèrement tronconique.According to yet another aspect of the invention, the peripheral side wall is substantially cylindrical. The bottom and front walls can be parallel and flat. Alternatively, the bottom wall may be concave or convex, as is the front wall. The peripheral side wall may be slightly frustoconical.

Selon un aspect important de la présente invention, les axes de projection des canaux de tourbillonnement s'étendant transversalement par rapport à la paroi de fond et à la paroi latérale, avantageusement avec un angle de l'ordre de 45° par rapport à la paroi de fond et par rapport à la paroi latérale. Cela implique que les axes de projection issus des canaux s'étendent dans la chambre en s'éloignant à la fois de la paroi de fond et de la paroi latérale, et avantageusement de manière parfaitement symétrique.According to an important aspect of the present invention, the axes of projection of the swirl channels extending transversely with respect to the bottom wall and the side wall, preferably with an angle of about 45 ° with respect to the wall bottom and with respect to the side wall. This implies that the projection axes from the canals extend into the chamber away from both the bottom wall and the side wall, and advantageously perfectly symmetrical.

Selon une autre caractéristique intéressante de l'invention, les canaux de tourbillonnement sont formés dans une paroi tronconique ayant un axe de révolution confondu avec l'axe de distribution. De cette manière, les canaux de tourbillonnement peuvent déboucher dans la chambre de tourbillonnement avec une orientation oblique, à la fois par rapport à la paroi de fond qui est avantageusement perpendiculaire à l'axe de distribution, et par rapport à la paroi latérale qui est avantageusement cylindrique. Les sorties des canaux de tourbillonnement sont avantageusement formées dans la paroi de fond de manière directement adjacentes à la paroi latérale cylindrique. Grâce à leur disposition oblique provenant de la paroi tronconique, les flux de produit fluide pénètrent dans la chambre de tourbillonnement en s'éloignant à la fois de la paroi de fond et de la paroi latérale, en direction de la paroi avant où est formé l'orifice de pulvérisation.According to another advantageous characteristic of the invention, the swirling channels are formed in a frustoconical wall having an axis of revolution coincident with the distribution axis. In this way, the swirl channels can lead into the swirl chamber with an oblique orientation, both with respect to the bottom wall which is advantageously perpendicular to the distribution axis, and with respect to the side wall which is advantageously cylindrical. The outlets of the swirl channels are advantageously formed in the bottom wall directly adjacent to the cylindrical side wall. Thanks to their oblique disposition coming from the frustoconical wall, the flows of fluid product penetrate into the swirl chamber away from both the bottom wall and the side wall, in the direction of the front wall where is formed l spray orifice.

Selon un mode de réalisation pratique, la tête de pulvérisation comprend un corps de tête et un gicleur, le corps de tête formant une broche définissant la paroi de fond et la paroi tronconique, le gicleur étant engagé autour de la broche en définissant entre eux la chambre de tourbillonnement et les canaux de tourbillonnement, le gicleur définissant la paroi avant et la paroi latérale, ainsi qu'une zone tronconique qui vient en contact étanche avec la paroi tronconique de la broche pour former les canaux de tourbillonnement, le gicleur présentant avantageusement une symétrie de révolution autour de l'axe de distribution.According to a practical embodiment, the spray head comprises a head body and a nozzle, the head body forming a pin defining the bottom wall and the frustoconical wall, the nozzle being engaged around the pin defining between them the swirl chamber and the swirl channels, the nozzle defining the front wall and the side wall, and a frustoconical zone which comes into sealing contact with the frustoconical wall of the spindle to form the swirl channels, the nozzle advantageously having a symmetry of revolution around the axis of distribution.

Selon un autre aspect intéressant de l'invention, les sorties de canaux débouchent de manière non tangentielle dans la chambre de tourbillonnement. De cette manière, on évite encore davantage que les flux de produit fluide issus des sorties de canaux de tourbillonnement ne s'écoulent le long de la paroi latérale de la chambre de tourbillonnement.According to another interesting aspect of the invention, the channel outlets open non-tangentially into the swirl chamber. In this way, it is furthermore avoided that fluid streams from the swirl channel outlets flow along the side wall of the swirl chamber.

Avantageusement, la chambre de tourbillonnement peut présenter une épaisseur E dans le sens de l'axe de distribution et un diamètre D dans le sens perpendiculaire à l'axe de distribution, le rapport E/D étant inférieur à environ 0,8, E étant avantageusement inférieur à environ 0,5 mm.Advantageously, the swirl chamber may have a thickness E in the direction of the distribution axis and a diameter D in the direction perpendicular to the distribution axis, the ratio E / D being less than about 0.8, E being advantageously less than about 0.5 mm.

Selon un autre aspect de la présente invention, les canaux de tourbillonnement sont rectilignes. Ainsi, on minimise les pertes de charge, particulièrement lorsque les canaux présentent une section réduite.According to another aspect of the present invention, the swirl channels are rectilinear. Thus, the pressure drops are minimized, particularly when the channels have a reduced section.

L'invention définit également un distributeur de produit fluide comprenant un réservoir, une pompe montée sur le réservoir et une tête de pulvérisation telle que définie ci-dessus associée à la pompe. La tête de distribution peut être rapportée sur une sortie de la pompe ou encore intégrée à la pompe. Dans la plupart des cas, la tête de pulvérisation se présente sous la forme d'un poussoir rapporté sur l'extrémité libre de la tige d'actionnement de la pompe.The invention also defines a fluid dispenser comprising a reservoir, a pump mounted on the reservoir and a spray head as defined above associated with the pump. The dispensing head can be attached to an outlet of the pump or integrated into the pump. In most cases, the spray head is in the form of a pusher attached to the free end of the actuating rod of the pump.

L'esprit de l'invention réside dans le fait d'éloigner les flux de produit fluide issus des canaux de tourbillonnement des parois internes de la chambre de tourbillonnement afin de réduire les pertes de charge et de minimiser les phénomènes d'écoulement laminaires parasites. Les flux de produit fluide issus des canaux de tourbillonnement pénètrent bien évidemment dans la chambre de tourbillonnement au niveau d'une de ses parois internes, mais les flux sont orientés de telle manière qu'ils s'éloignent immédiatement de ces parois internes.The spirit of the invention lies in the fact of moving the fluid product streams coming from the swirling channels from the internal walls of the swirl chamber in order to reduce the pressure losses and to minimize parasitic laminar flow phenomena. Fluid flows from the swirling channels obviously enter the swirl chamber at one of its internal walls, but the flows are oriented such that they immediately move away from these internal walls.

L'invention sera maintenant plus amplement décrite en référence aux dessins joints, donnant à titre d'exemple non limitatif un mode de réalisation de l'invention.The invention will now be further described with reference to the accompanying drawings, giving by way of non-limiting example an embodiment of the invention.

Sur les figures :

  • La figure 1 est une vue éclatée en perspective d'une tête de distribution selon une forme de réalisation de la présente invention,
  • La figure 2 est une vue en plan fortement agrandie d'un détail du corps de tête de la figure 1, et
  • La figure 3 est une vue en section transversale horizontale à travers la tête de pulvérisation de la figure 1 à l'état monté.
In the figures:
  • The figure 1 is an exploded perspective view of a dispensing head according to an embodiment of the present invention,
  • The figure 2 is a greatly enlarged plan view of a detail of the head body of the figure 1 , and
  • The figure 3 is a horizontal cross-sectional view through the spray head of the figure 1 in the assembled state.

La tête de pulvérisation de la présente invention peut être mise en oeuvre à la sortie de n'importe quel dispositif de distribution de produit fluide, comme par exemple une pompe, une valve, un réservoir écrasable, etc. La tête de pulvérisation de l'invention trouvera une application privilégiée en tant que poussoir actionnable manuellement à l'aide d'un ou de plusieurs doigt(s). Ce poussoir peut être intégré à une pompe ou à une valve, ou de préférence rapporté sur l'extrémité libre d'une tige d'actionnement formant un conduit de sortie interne. Lorsqu'il s'agit d'une pompe, la tige d'actionnement est pourvue d'un piston qui coulisse de manière étanche à l'intérieur d'un fût formé dans un corps de pompe qui est monté fixement sur l'ouverture d'un réservoir. La pompe comprend de manière conventionnelle une chambre de pompe pourvue d'un clapet d'entrée, et d'un clapet de sortie qui peut être porté par la tige d'actionnement. Ainsi, en enfonçant la tige d'actionnement à l'intérieur du corps de pompe à l'encontre d'un ressort, le volume de la chambre de pompe diminue, mettant ainsi le produit fluide qu'il contient sous pression. Dès que la pression atteint une valeur prédéterminée, le clapet de sortie s'ouvre et le produit fluide sous pression est refoulé à travers la tige d'actionnement pour parvenir jusqu'au poussoir intégrant une tête de pulvérisation selon l'invention.The spray head of the present invention may be operated at the outlet of any fluid dispenser device, such as a pump, a valve, a collapsible reservoir, etc. The spray head of the invention will find a preferred application as a manually operable pusher with one or more finger (s). This pusher may be integrated with a pump or a valve, or preferably attached to the free end of an actuating rod forming an internal outlet duct. In the case of a pump, the actuating rod is provided with a piston that slides sealingly inside a barrel formed in a pump body which is fixedly mounted on the opening of the pump. 'a reservoir. The pump conventionally comprises a pump chamber provided with an inlet valve, and an outlet valve which can be carried by the actuating rod. Thus, by pushing the actuating rod inside the pump body against a spring, the volume of the pump chamber decreases, thereby putting the fluid contained therein under pressure. As soon as the pressure reaches a predetermined value, the outlet valve opens and the fluid under pressure is forced through the actuating rod to reach the pusher incorporating a spray head according to the invention.

La tête de pulvérisation selon un mode de réalisation non limitatif de l'invention comprend un corps de tête 1 qui peut être réalisé par injection moulage de matière plastique approprié. Le corps de tête 1 peut être réalisé de manière monobloc. Il comprend de manière conventionnelle un manchon de raccordement destiné à être rapporté sur l'extrémité libre de la tige d'actionnement d'une pompe ou d'une valve. Ce manchon de raccordement est relié à un logement 10 par une série de conduits et canaux internes. Le logement 10 est de préférence cylindrique et débouche latéralement sur la périphérie du corps de tête. Le logement 10 contient une broche 11 qui fait saillie vers l'extérieur du logement. Ainsi, un espace annulaire est ménagé à l'intérieur du logement 10 autour de la broche 11. De manière conventionnelle, un gicleur 2 est rapporté et inséré fixement à l'intérieur du logement 10 autour de la broche 11, comme on peut le voir sur la figure 3. Une série de conduits internes est définie entre la broche 11 et le gicleur 2 pour acheminer le produit fluide issu du manchon de raccordement jusqu'à un orifice de pulvérisation 21 formé par le gicleur 2. Bien que non représentée, la tête de pulvérisation peut encore être pourvue d'une frette d'habillage qui enveloppe de manière esthétique le corps de tête 1 en laissant le gicleur 2 apparent.The spray head according to a non-limiting embodiment of the invention comprises a head body 1 which can be made by injection molding of suitable plastic material. The head body 1 can be made in one piece. It conventionally comprises a connection sleeve intended to be attached to the free end of the actuating rod of a pump or a valve. This connecting sleeve is connected to a housing 10 by a series of ducts and internal channels. The housing 10 is preferably cylindrical and opens laterally on the periphery of the head body. The housing 10 contains a pin 11 which protrudes outwardly of the housing. Thus, an annular space is formed inside the housing 10 around the spindle 11. In a conventional manner, a nozzle 2 is attached and fixedly inserted inside the housing 10 around the spindle 11, as can be seen on the figure 3 . A series of internal conduits is defined between the pin 11 and the nozzle 2 to convey the fluid product from the connection sleeve to a spray orifice 21 formed by the nozzle 2. Although not shown, the spray head can still be provided with a trim band which aesthetically envelops the head body 1 leaving the nozzle 2 apparent.

En se référant à la figure 2, on peut voir de manière fortement agrandie le logement 10 et la broche 11 qu'il contient. Le logement 10, dans ce mode de réalisation, présente une configuration circulaire sensiblement cylindrique. Quant à la broche 11, elle est disposée de manière sensiblement centrale à l'intérieur du logement 10 et présente une section transversale oblongue avec deux secteurs arrondis 111 et deux méplats 112. La face frontale de la broche 11 qui est tournée vers l'extérieur du logement 10 présente une structure complexe qui va maintenant être décrite. En se référant à nouveau à la figure 2, on peut voir que cette face frontale est majoritairement définie par une paroi tronconique 14 dont l'axe de révolution est confondu avec l'axe de la broche et l'axe de distribution X, comme on le verra ci-après. La paroi tronconique 14 est tronquée sur sa périphérie extérieure, mais également en son centre de manière à définir une paroi de fond 12, qui est ici sensiblement plane et perpendiculaire à l'axe de révolution de la paroi tronconique 14. Selon l'invention, la paroi tronconique 14 est formée avec deux rainures ou saignées 13' qui s'étendent des méplats 112 dans la paroi tronconique 14 jusqu'à la paroi de fond 12 dans laquelle elles débouchent en formant des sorties de canaux 131. On peut remarquer que les rainures ou saignées 13' parviennent au niveau de la paroi de fond 12 de manière non tangentielle. Sur la figure 2, on peut également remarquer qu'un conduit commun 17 relie le logement 10 à un puits formant le manchon de raccordement.Referring to the figure 2 the housing 10 and the spindle 11 which it contains can be seen in a greatly enlarged manner. The housing 10, in this embodiment, has a substantially cylindrical circular configuration. As for the spindle 11, it is disposed substantially centrally inside the housing 10 and has an oblong cross section with two rounded sectors 111 and two flats 112. The front face of the spindle 11 which faces outwards housing 10 has a complex structure which will now be described. Referring again to the figure 2 it can be seen that this front face is mainly defined by a frustoconical wall 14 whose axis of revolution coincides with the axis of the spindle and the distribution axis X, as will be seen below. The frustoconical wall 14 is truncated on its outer periphery, but also in its center so as to define a bottom wall 12, which is here substantially planar and perpendicular to the axis of revolution of the frustoconical wall 14. According to the invention, the frustoconical wall 14 is formed with two grooves or grooves 13 'which extend from the flats 112 in the frustoconical wall 14 to the bottom wall 12 in which they open out forming channel outlets 131. It may be noted that the grooves or grooves 13 'reach the level of the bottom wall 12 non-tangentially. On the figure 2 it may also be noted that a common duct 17 connects the housing 10 to a well forming the connection sleeve.

On se référera maintenant à la figure 3 pour décrire en détail le gicleur 2 et sa coopération avec le logement 10 et sa broche 11. Le gicleur 2 présente de préférence une symétrie de révolution autour de l'axe de distribution X passant par l'orifice de pulvérisation 21. Ainsi, il n'est pas nécessaire d'orienter le gicleur 2 lors de son insertion dans le logement 10 du corps de tête 1. L'orifice de pulvérisation 21 est formé au même niveau d'une paroi de distribution 22 d'épaisseur réduite. L'orifice de pulvérisation 21 se présente sous la forme d'un alésage parfaitement ou sensiblement cylindrique qui traverse l'épaisseur de la paroi de distribution 22. Autour de cette paroi 22, le gicleur forme un cône de diffusion 23 qui favorise la formation d'un spray de bonne qualité. Intérieurement, la paroi de distribution 22 forme une paroi avant 24 qui peut être parfaitement ou sensiblement plane, ou encore légèrement concave, convexe ou tronconique. La paroi avant 24 est interrompue en son centre par l'orifice de pulvérisation 21. Le gicleur 2 forme également une paroi latérale périphérique 25 qui peut présenter une configuration cylindrique autour de l'axe de distribution X. En variante, il est également possible de réaliser la paroi latérale 25 avec une configuration tronconique, voire complexe. Au-delà de cette paroi latérale 25, le gicleur 2 forme une zone ou section tronconique 26 présentant un angle solide identique à celui de la paroi tronconique 14 de la broche 11. Ainsi, cette zone ou section tronconique 26 peut venir en contact intime étanche avec la paroi tronconique 14, de manière à isoler entre eux des canaux de tourbillonnement 13 au niveau des saignées ou rainures 13'. Ces canaux de tourbillonnement 13 débouchent au niveau des sorties de canaux 131 dans un volume sensiblement cylindrique défini entre la paroi de fond 12 de la broche 11, la paroi avant 24 et la paroi latérale 25 du gicleur 2. Ce volume interne constitue une chambre de tourbillonnement 20 dont l'entrée est définie par les sorties de canaux 131 et la sortie est définie par l'orifice de pulvérisation 21. Les sorties de canaux 113 ne sont pas directement tangents à la paroi latérale 25, mais légèrement décalés cers l'intérieur de la chambre de tourbillonnement 20. Cette chambre peut présenter une épaisseur E dans le sens de l'axe de distribution X de l'ordre de 0,5 mm et un diamètre D dans le sens perpendiculaire à l'axe de distribution X de l'ordre de 0.7 mm. De manière empirique on a constaté que le rapport E/D est de préférence inférieur à environ 0,8.We will now refer to the figure 3 to describe in detail the nozzle 2 and its cooperation with the housing 10 and its spindle 11. The nozzle 2 preferably has a symmetry of revolution about the distribution axis X passing through the spray orifice 21. Thus, it It is not necessary to orient the nozzle 2 when it is inserted into the housing 10 of the head body 1. The spray orifice 21 is formed at the same level a distribution wall 22 of reduced thickness. The spray orifice 21 is in the form of a perfectly or substantially cylindrical bore which passes through the thickness of the distribution wall 22. Around this wall 22, the nozzle forms a diffusion cone 23 which promotes the formation of 'a good quality spray. Internally, the distribution wall 22 forms a front wall 24 which may be perfectly or substantially flat, or slightly concave, convex or frustoconical. The front wall 24 is interrupted at its center by the spray orifice 21. The nozzle 2 also forms a peripheral lateral wall 25 which may have a cylindrical configuration around the distribution axis X. In a variant, it is also possible to realize the side wall 25 with a frustoconical configuration, or complex. Beyond this side wall 25, the nozzle 2 forms a zone or frustoconical section 26 having a solid angle identical to that of the frustoconical wall 14 of the spindle 11. Thus, this frustoconical zone or section 26 can come into intimate sealed contact. with the frustoconical wall 14, so as to isolate between them swirl channels 13 at the grooves or grooves 13 '. These swirling channels 13 open at the level of the channel outlets 131 in a substantially cylindrical volume defined between the bottom wall 12 of the spindle 11, the front wall 24 and the side wall 25 of the nozzle 2. This internal volume constitutes a chamber of swirling 20 whose input is defined by the channel outputs 131 and the output is defined by the spray orifice 21. The channel outputs 113 are not directly tangent to the side wall 25, but slightly shifted inwards of the swirl chamber 20. This chamber may have a thickness E in the direction of the distribution axis X of the order of 0.5 mm and a diameter D in the direction perpendicular to the distribution axis X of the order of 0.7 mm. Empirically it has been found that the E / D ratio is preferably less than about 0.8.

Selon l'invention, les canaux de tourbillonnement 13, qui sont avantageusement rectilignes, définissent des axes de projection Y qui débouchent dans la chambre de tourbillonnement 20 au niveau des deux sorties de canaux 131 et s'étendent à l'intérieur de cette chambre 20 de manière oblique sans longer ni la paroi de fond 12 ni la paroi latérale 25. Comme on peut le voir sur la figure 3, les deux axes de projection Y s'étendent dans la chambre 20 à partir de la paroi de fond sensiblement au niveau où elle vient en jonction avec la paroi cylindrique 25. Ainsi, les deux axes de projection Y s'étendent dans la chambre de tourbillonnement 20 avec un angle de l'ordre de 45° par rapport à la paroi de fond 12 et par rapport à la paroi latérale 25. De ce fait, le flux de produit fluide qui pénètre à l'intérieur de la chambre de tourbillonnement 20 s'éloigne immédiatement et progressivement des parois de fond 12 et latérales 20 et se rapproche de la paroi avant 24 où est formé l'orifice de pulvérisation 21. Bien entendu, du fait de leur arrivée sensiblement tangentielle à l'intérieur de la chambre de tourbillonnement 20, les flux de produit fluide issus des canaux de tourbillonnement 13 vont générer un tourbillonnement ou vortex de produit fluide à l'intérieur de la chambre avant de traverser l'orifice de pulvérisation 21. Sans sortir du cadre de la présente invention, on voit bien que la paroi de fond 12 et la paroi latérale 25 peuvent être réalisées avec des configurations variées, à condition que les flux de produit fluide qui pénètrent dans la chambre de tourbillonnement 20 selon les axes Y ne longent pas les parois de fond 12 et latérales 25. Le but recherché par la présente invention est d'éviter tout écoulement laminaire le long des parois internes de la chambre de tourbillonnement 20. En formant les canaux de tourbillonnement 13 dans une paroi tronconique, ceux-ci sont orientés de manière oblique par rapport à l'axe de distribution X, de sorte que les flux de produit fluide qui pénètrent dans la chambre de tourbillonnement 20 ne longent aucune de ces parois internes, étant donné que la paroi de fond 12 est sensiblement ou globalement perpendiculaire à l'axe X et que la paroi latérale 25 est globalement ou sensiblement cylindrique.According to the invention, the swirl channels 13, which are advantageously rectilinear, define projection axes Y which open into the swirl chamber 20 at the level of the two channel outlets 131 and extend inside this chamber 20 obliquely without longitudinal or the bottom wall 12 nor the side wall 25. As can be seen on the figure 3 , the two projection axes Y extend into the chamber 20 from the bottom wall substantially at the level where it comes into contact with the cylindrical wall 25. Thus, the two projection axes Y extend in the chamber of swirl 20 at an angle of the order of 45 ° with respect to the bottom wall 12 and with respect to the side wall 25. As a result, the flow of fluid which penetrates inside the swirl chamber 20 moves away immediately and progressively from the bottom walls 12 and laterals 20 and approaches the front wall 24 where is formed the spray orifice 21. Of course, because of their substantially tangential arrival inside the chamber of 20, fluid flows from the swirling channels 13 will generate a swirl or vortex fluid within the chamber before passing through the spray orifice 21. Without leaving the scope of the In the present invention, it can clearly be seen that the bottom wall 12 and the side wall 25 can be made with various configurations, provided that the flows of fluid that penetrate the swirl chamber 20 along the Y axes do not follow the walls. The purpose of the present invention is to avoid any laminar flow along the internal walls of the swirl chamber 20. By forming the swirl channels 13 in a frustoconical wall, these are oriented obliquely to the distribution axis X, so that the flows of fluid that penetrate the swirl chamber 20 do not run along any of these internal walls, since the bottom wall 12 is substantially or generally perpendicular to the X axis and that the side wall 25 is generally or substantially cylindrical.

En amont des canaux de tourbillonnement 13, la broche 11 et le gicleur 2 forment deux canaux d'alimentation respectifs 15 et un canal annulaire commun 16 qui communique encore plus en amont avec le conduit commun 17 visible sur la figure 2. Les canaux d'alimentation 15 sont ici formés entre les méplats 112 de la broche 11 et la paroi interne 27 du gicleur 2. Pour son maintien fixe et étanche à l'intérieur du logement 10, le gicleur 2 comprend des moyens d'accrochage étanches 28 sous la forme de profils saillants permettant une accroche étanche à l'intérieur du logement 10.Upstream of the swirling channels 13, the spindle 11 and the nozzle 2 form two respective supply channels 15 and a common annular channel 16 which communicates even further upstream with the common conduit 17 visible on the figure 2 . The supply channels 15 are here formed between the flats 112 of the spindle 11 and the inner wall 27 of the nozzle 2. For its fixed and sealed retention inside the housing 10, the nozzle 2 comprises sealed hooking means 28 in the form of projecting profiles allowing a tight grip inside the housing 10.

Le fait que les flux de produit fluide issus des canaux de tourbillonnement 13 pénètrent dans la chambre de tourbillonnement sans longer aucune de ces parois internes permet de réduire les pertes de charge dans la chambre de tourbillonnement 20 en évitant les phénomènes de volume laminaire parasite. Cette caractéristique est d'autant plus avantageuse que l'on réalise les canaux de tourbillonnement 13 avec des sections de passage réduites générant une perte de charge importante. Ainsi, la perte de charge générée par les sections réduites des canaux de tourbillonnement permet de réaliser un tourbillonnement ou vortex à l'intérieur de tourbillonnement 20 sans perte de charge à ce niveau.The fact that the flows of fluid product from the swirling channels 13 penetrate into the swirl chamber without passing any of these internal walls makes it possible to reduce the pressure drops in the swirl chamber 20 by avoiding phenomena of parasitic laminar volume. This feature is all the more advantageous as the swirl channels 13 are made with reduced passage sections generating a significant pressure drop. Thus, the pressure drop generated by the reduced sections of the swirl channels makes it possible to carry out a swirling or vortexing within the swirl 20 without loss of load at this level.

Bien que la tête de pulvérisation de l'invention ait été illustrée avec deux canaux de tourbillonnement 13, il est possible d'en prévoir plus de deux sans pour cela sortir du cadre de l'invention. Les canaux de tourbillonnement sont ici alimentés par un conduit interne commun 17 et un canal annulaire commun 16 : cependant, on peut également prévoir que chaque canal 13 soit alimenté de manière parfaitement indépendante par des conduits respectifs propres.Although the spray head of the invention has been illustrated with two swirl channels 13, it is possible to provide more than two without departing from the scope of the invention. The swirling channels are fed here by a common internal conduit 17 and a common annular channel 16: however, it is also possible for each channel 13 to be supplied perfectly independently by respective clean ducts.

Grâce à l'invention, on obtient une tête de pulvérisation à perte de charge réduite et sans effet laminaire parasite.Thanks to the invention, a spray head is obtained with reduced pressure drop and without parasitic laminar effect.

Claims (11)

  1. A fluid spray head comprising:
    • a spray orifice (21) defining a dispensing axis X;
    • a swirl chamber (20) upstream from the spray orifice (21), the chamber including an end wall (12) that is substantially perpendicular to the dispensing axis X, and a peripheral side wall (25); and
    • swirl channels (13) respectively defining channel outlets (131) that open out transversally to the dispensing axis X into the swirl chamber (20) so as to generate a swirl flow inside the swirl chamber (20), each channel (13) defining a projection axis Y that extends into the swirl chamber (20) from the channel outlet (131);
    said spray head being characterized in that the projection axes Y of the swirl channels (13) extend away both from the end wall (12) and from the peripheral side walls (25) which are both adjacent to the channel outlets (131) so as to pass through the swirl chamber (20) without passing along either the end wall (12) or the peripheral side wall (25).
  2. A spray head according to claim 1, wherein the end wall (12) is substantially plane, the channel outlets (131) opening out into the swirl chamber (20) at the end wall (12).
  3. A spray head according to claim 1 or claim 2, wherein the swirl chamber (20) includes a front wall (24) in which the spray orifice (21) is formed, the projection axes Y being directed towards the front wall (21).
  4. A spray head according to any preceding claim, wherein the peripheral side wall (25) is substantially cylindrical.
  5. A spray head according to claim 2 or claim 4, wherein the projection axes Y of the swirl channels (13) extend transversally relative to the end wall (12) and to the side wall (25), advantageously with an angle of about 45° relative to the end wall (12) and relative to the side wall (25).
  6. A spray head according to any preceding claim, wherein the swirl channels (13) are formed in a frustoconical wall (14) having an axis of revolution that coincides with the dispensing axis X.
  7. A spray head according to the preceding claims, comprising a head body (1) and a nozzle (2), the head body (1) forming a pin (11) that defines the end wall (12) and the frustoconical wall (14), the nozzle (2) being engaged around the pin (11), and between them they define the swirl chamber (20) and the swirl channels (13), the nozzle (2) defining the front wall (24), the side wall (25), and a frustoconical zone (26) that comes into leaktight contact with the frustoconical wall (14) of the pin (11) so as to form the swirl channels (13), the nozzle (2) advantageously being circularly symmetrical about the dispensing axis X.
  8. A spray head according to any preceding claim, wherein the channel outlets (131) open out in non-tangential manner into the swirl chamber (20).
  9. A spray head according to any preceding claim, wherein the swirl chamber (20) presents a thickness E in the direction of the dispensing axis X, and a diameter D in the direction that is perpendicular to the dispensing axis X, the ratio E/D being less than about 0.8, E advantageously being less than about 0.5 mm.
  10. A spray head according to any preceding claim, wherein the swirl channels (13) are rectilinear.
  11. A fluid dispenser comprising a reservoir, a pump mounted on the reservoir, and a spray head according to any preceding claim and associated with the pump.
EP13774715.0A 2012-09-04 2013-09-02 Spray head for a fluid and dispenser comprising such a spray head Active EP2892655B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1258233A FR2994866B1 (en) 2012-09-04 2012-09-04 FLUID SPRAY HEAD AND DISPENSER COMPRISING SUCH A SPRAY HEAD.
PCT/FR2013/052008 WO2014037655A1 (en) 2012-09-04 2013-09-02 Spray head for a fluid product and dispenser comprising such a spray head

Publications (2)

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EP2892655A1 EP2892655A1 (en) 2015-07-15
EP2892655B1 true EP2892655B1 (en) 2016-11-09

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US (1) US9370786B2 (en)
EP (1) EP2892655B1 (en)
JP (1) JP6276271B2 (en)
CN (1) CN104736250B (en)
BR (1) BR112015004686B1 (en)
ES (1) ES2611763T3 (en)
FR (1) FR2994866B1 (en)
IN (1) IN2015DN01203A (en)
WO (1) WO2014037655A1 (en)

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FR3065890B1 (en) * 2017-05-05 2019-06-14 Aptar France Sas FLUID PRODUCT DISTRIBUTION MODULE.
FR3065889B1 (en) 2017-05-04 2021-12-17 Aptar France Sas FLUID PRODUCT DISTRIBUTION HEAD AND MOLDING KIT OF SUCH HEAD
JP6863614B2 (en) * 2019-03-08 2021-04-21 株式会社サイエンス Mist spray
FR3094970B1 (en) * 2019-04-10 2022-12-23 Lindal France Diffuser for pressure vessel
CN113102125A (en) * 2021-03-24 2021-07-13 北京霍里思特科技有限公司 Spray head, spray system and mineral product sorting machine

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Publication number Publication date
JP6276271B2 (en) 2018-02-07
FR2994866A1 (en) 2014-03-07
BR112015004686B1 (en) 2020-12-22
CN104736250A (en) 2015-06-24
ES2611763T3 (en) 2017-05-10
US20150202638A1 (en) 2015-07-23
WO2014037655A1 (en) 2014-03-13
US9370786B2 (en) 2016-06-21
EP2892655A1 (en) 2015-07-15
IN2015DN01203A (en) 2015-06-26
FR2994866B1 (en) 2019-08-23
BR112015004686A2 (en) 2017-07-04
CN104736250B (en) 2017-03-08
JP2015526287A (en) 2015-09-10

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