FR2688711A1 - DISTRIBUTION NOZZLE. - Google Patents

Abstract

Distribution nozzle (1) for the distribution of a fluid to be distributed, under pressure, comprising a central supply chamber (4) arranged around an axis and a central outlet channel (7) in communication on the one hand with said central chamber (4) and on the other hand with the outside, said outlet channel (7) being arranged in the axis of said central chamber (4), the distribution nozzle (1) further comprising a chamber peripheral supply (36) and a peripheral outlet channel (25) in communication on the one hand with said peripheral chamber (36) and on the other hand with the outside, said peripheral chamber (36) surrounding said central chamber ( 4) and the peripheral channel (25) surrounding said central channel (7), the two said chambers (4, 36) and said peripheral channel (25) being disposed circumferentially around said axis of said central chamber (4).

Description

DISTRIBUTION NOZZLE

  The invention relates to a dispensing nozzle for the

  distribution of a fluid to be distributed.

  To distribute a fluid, it is usual to make it pass, under pressure, a dispensing nozzle which comprises a central supply chamber disposed around an axis and an outlet channel disposed along this axis The pressure can be obtained from different ways, for example manually, by action on a pear equipping the container containing the fluid to be dispensed, or on the container itself provided flexible, or on a push button for actuating a pump; the pressure applied to the fluid can also be obtained by the presence in the container of another fluid introduced under pressure,

  whether gaseous or liquefied, propelling the fluid to be dispensed.

  The quality of the distribution essentially lies in the fineness of the particles sprayed; hitherto, shapes given to the distribution chamber and / or to the outlet channel have made it possible to improve the spraying of the fluid to be distributed and to obtain a suitable distribution; but the number of parameters which can act on the fineness of this spraying is limited, and these parameters had to be kept within close tolerances, which increases the cost price and is not

  not always compatible with mass production.

  The present invention relates to a dispensing nozzle making it possible to obtain a spraying of the fluid to be dispensed as suitable, but under easier industrialization conditions and

more flexible.

  Thus, according to the invention, a distribution nozzle for the distribution of a fluid to be dispensed, under pressure, comprising a central supply chamber disposed around an axis and a central outlet channel in communication on the one hand with said supply chamber and on the other hand with the outside, said outlet channel being disposed in the axis of said central chamber, is characterized in that it further comprises a peripheral supply chamber and a channel peripheral outlet in communication on the one hand with said peripheral chamber and on the other hand with the outside, said peripheral chamber surrounding said central chamber and the peripheral channel surrounding said central channel, the two said chambers and said peripheral channel being arranged circumferentially around said axis of said central chamber, the peripheral chamber being intended to be supplied with a second fluid to be distributed, distinct from the first fluid supplying the central chamber, one of said first and second fluids being a gas, and the other a liquid. Advantageously, the central chamber is defined by a central cup fitted on a central end piece carried by a support, between the internal face of said central cup and the external face of said central end piece, the central outlet channel passing through the

  1 o bottom of said central cup.

  The peripheral chamber is, in the same way, defined by a peripheral cup fitted on a peripheral tip carried by the support, between the inner face of said peripheral cup, the outer face of said peripheral tip and the outer face of the central cup. , the peripheral output channel

  crossing the bottom of said peripheral cup.

  Preferably, the central cup is also fitted inside the peripheral end piece, and advantageously, the peripheral cup is also fitted inside a

  external tip of the support surrounding the peripheral tip.

  The central and / or peripheral supply chamber is cylindrical, or conical, converging towards the outside, or

hemispherical, or whatever.

  These arrangements allow, one of the fluids being a gas and the other a liquid, a fractionation of the liquid by the gas and therefore greater spray finesse. This fractionation is further improved when the central and / or peripheral chamber is provided with 'fins imparting a swirling motion to the fluid passing through it. The central outlet channel is cylindrical, or conical, advantageously converging towards the outside; preferably, it has a conical portion opening into the

  distribution and a cylindrical portion opening to the outside.

  The peripheral outlet channel is cylindrical or conical,

  advantageously diverge outwards.

  A cup-shaped cap is fitted on the peripheral cup and in the external end piece of the support, and defines, in combination with the conical outer face of the peripheral cup, a plurality of conical passages converging towards the outside, distributed circumferentially around of the axis, each passage having an inlet and an outlet, said inlet, further from the axis and wider than said outlet communicating with the outside, and said outlet also communicating with the outside in the vicinity of

the output of the peripheral channel.

  Thus, the outside air, sucked in by the vacuum prevailing at the outlet of the peripheral channel, also breaks up the sprayed fluid and aerates it. The present invention can be variously applied, for example to a distribution pump, a distribution valve, metering or not, a pear system. Thus, the nozzle support is the push button for actuating a distribution pump intended for equip a dispenser container, one of the two fluids being the liquid to be dispensed present in the container and the other fluid being the gas in the container,

  especially when the gas in the container is under pressure.

  As a variant, the nozzle support is the dispensing valve of an aerosol can, one of the two fluids being the liquid to be dispensed and

  the other fluid the gaseous propellant of the liquid to be dispensed.

  According to another variant, the nozzle support is the end of a squeeze bottle, one of the two fluids being the liquid to be dispensed and the other fluid the air contained in the bottle above the

liquid level.

  Of course, the gaseous fluid can be a compressed gas

  or a liquefied gas, and preferably compressed air, or nitrogen.

  To better understand the object of the invention, we will 3 o describe below, purely by way of illustration and not limitation, a method of

  realization shown in the accompanying drawings.

  In these drawings: FIG. 1 represents, in section, a dispensing nozzle according to the invention; 2 shows, in section, a variant of the dispensing nozzle according to Figure 1; Figure 3 shows, in section, another variant of the dispensing nozzle according to the invention; Figure 3a is a side view showing the inner face of the central cup of the nozzle according to Figure 3; Figure 3b is a side view showing the inner face of the peripheral cup of the nozzle according to Figure 3; Figure 4 is a section showing another variant of the nozzle according to the invention; Figure 4a is a side view showing the inside face of the central cup of the nozzle according to Figure 4; Figure 4b is a side view showing the outer face of the central cup of the nozzle according to Figure 4; FIG. 5 is a section showing another variant of the dispensing nozzle according to the invention; 1S Figure Sa is a side view showing the inner face of the cap, cup-shaped, the nozzle according to the

figure 5.

  In FIG. 1, the dispensing nozzle according to the invention, generally designated by the reference numeral 1, comprises a central cup 2 fitted on a central end piece 3 carried by a support; a central chamber 4 is thus defined by the internal face 5 of the central cup 2 and the external face 6 of the central end piece 3 The bottom of the central cup 2 is crossed by a central outlet channel 7, and the cylindrical part of said central cup 2 is fitted with a seal at 32 inside a peripheral end piece 13, of the support, surrounding the central end piece 3; the central cup 2 is held axially in the peripheral end piece 13, for example by clipping

in 33.

  A peripheral cup 11 is fitted on the peripheral end piece 13, and, at sealing, at 34 inside an external end piece 28 carried by the support, the external end piece 28 surrounding the peripheral end piece 13; the peripheral cup 11 is held axially in the external end piece 28, for example by clipping at 35 A peripheral chamber 36 is thus defined between the internal face 12 of the peripheral cup 11, the external face of the peripheral end piece 13, and the outer face 14 of the central cup 2 The outer face of the bottom of the central cup 2 and the inner face of the bottom of the peripheral cup 11 are conical, so that the bottoms of the two cups being in the same plane perpendicular to the axis, a peripheral outlet channel 25 passing through the bottom of the peripheral cup has, when the cups are mounted in the support, a

  annular shape and surrounds the central channel 7.

  The central chamber 4 is supplied with a first fluid by a supply inlet 9 and a clearance 8, for example a longitudinal groove in the interior face of the central cup 2, between the 1 o central cup 2 and the central sleeve 3, which game 8 opens into an annular space 9a of the support, the supply inlet 9 opening into the annular space 9a The peripheral chamber 36 is, in the same way, supplied with a second fluid by a supply inlet 15, an annular space i 5 a and a longitudinal groove i S 16 formed on the inner face of the cylindrical wall of the cup

device 11.

  The support 10 of the nozzle 1 according to the invention is the push button of a dispensing valve of a conventional aerosol can, which, for this reason, will not be detailed here. The supply inlet 9 communicates with the inside 19 of a tubular element 18 for actuating a valve which opens under the action of a force applied to the support 10, and the liquid contained in the container is then sprayed outside, through the central channel 7, under the action of

  propellant contained in the container in the usual way.

  In accordance with the present invention, this same action on the push button puts the space in the container containing the propellant into communication with the annular space 20, comprised between the tubular element 18 and a sheath 17, both carried by the button pusher, the annular space 20 communicating with the inlet 15 for supplying a second fluid, here the propellant gas; this propellant gas leaves through the peripheral channel 25 and, due to the conical shape of the peripheral chamber, this current of propellant gas collides, at the outlet, with the stream of liquid leaving the central channel 7; this arrangement allows better fractionation of the

  liquid distributed, and therefore greater spray finesse.

  The liquid and gas distribution sequences can be varied: it is, for example, advantageous to distribute gas first, then gas and liquid at the same time, and then again gas alone, which will clean by drive the central channel 7 thanks to the vacuum created by the gas stream. The fractionation of the dispensed liquid can be adapted to its nature, in particular by adapting the central 7 and peripheral 25 channels,

  and all the central 4 and peripheral 36 rooms.

  According to the variant of Figure 2, the outer face of the bottom of the central cup 2 is in two conical parts 14 a, 14 b, the angle of the part 14 a being more acute than that of the part 14 b 1; thanks to this arrangement, the peripheral channel 25 is closer radially to the

central channel 7.

  According to the variant of FIG. 3, a progressive precompression is given to each of the fluids before they exit outside: for this, the central and peripheral chambers have volumes, at the entrance, frustoconical annulars, limited, among others, by the conical portions 21 and 22 respectively of the internal faces of the central 2 and peripheral 11 cups. It will also be noted, in this figure, the hemispherical shape of the end of the external face of the central end piece, the part facing the face inner 5 of the central cup 2 having a corresponding hemispherical shape, which inner face 5 of the central cup 2 being provided with helical fins 23, also visible in FIG. 3 a, of 2 S so as to provide the liquid with a movement vortex The channel

  central 7 has, here, a conical shape converging towards the exit.

  According to this same variant of Figure 3, the bottom of the peripheral cup It is flat, as well as the outer face of the central cup 2 located opposite; the inner face of the bottom of the peripheral cup 11 is provided with fins 24, also visible in FIG. 3b; these fins 24 are plane, in planes parallel to the axis but not passing through the axis, and inclined at the same angle and in the same direction relative to the rays which pass through their end farthest from the axis: this arrangement makes it possible to provide the propellant, also, with a vortex movement; it will be noted that the vortices of liquid and gas are in opposite directions so as to increase the fractionation. In the example of FIG. 3, the peripheral channel is formed by two truncated cones, one, 25 A, converging, and the other, 25 B, diverges, the flat end perpendicular to the axis of the outlet of the central channel being disposed in line with the connection plane of the two truncated cones 25 A, 25 B. The nozzle variant, according to l the invention, shown in FIG. 4, comprises the advantageous arrangements of FIG. 3, namely the precompression of the fluids thanks to the frustoconical shapes 21, 22 of the internal faces of the cups, as well as of the swirling movements of the fluids; according to this variant, the fins 26, 27 causing these vortex movements are all carried by the bottom of the central cup: these fins are of the type described according to FIG. 3b; the fins 26 are provided on the internal face of the central cup 2 and also visible in FIG. 4 a, seen from the left of FIG. 4, and the fins 27 are provided on the external face of the central cup 2 and also visible in FIG. 4 b, view of the

right of figure 4.

  The variant of FIG. 4 is also advantageous because of the relative arrangement and the constitution of the central and peripheral channels. The central channel is conical converging towards the outside at 7 _, and the conical peripheral channel diverging towards the outside at b; the two trunks of cones 7 a and 25 b are separated by a space 7 b in which the fluids meet; this venturi arrangement allows the compression of the liquid in 7 a, the meeting of the liquid and the gas in 7 b, the depression of the mixture in 25 _, and promotes the fineness and

  homogeneity of the spray.

  The variant nozzle according to FIG. 5 is similar to that of FIG. 4, to which a cap 37 in the form of a cup has been added; the cover 37 consists of a cylindrical skirt 38 and a spherical cap 39, connected by radial ribs 30 The skirt 38 is fitted with a seal, on the one hand, on the cylindrical external face of the peripheral cup 11 clipped in 35 and, on the other hand, inside the external end piece 28, clipped at 40, also sealed. The space between the internal face of the cap 39 and the external face of the peripheral cup 11 defines a plurality of conical channels converging towards the outside, the external face of the cup (11) being provided in conical shape, according to 29 in FIG. 5 these channels distributed conferentially around the axis open on either side to the outside , by having an inlet, distant from the axis, wider than the outlet near the axis; an annular outlet 31 is thus defined; this outlet 31 surrounds and is close to the outlet of the peripheral channel 25 b; thanks to this arrangement, the vacuum prevailing at the outlet of the venturi 7 a, 7 b, 25 b draws in outside air which passes through these

  channels and also comes to fractionate and aerate the sprayed fluid.

  The example shown shows the application of the nozzle according to 1 o the invention to a dispensing valve of an aerosol can, but, of course, it can equip any container for the distribution of a pressurized fluid: container provided a pear, container fitted with a pump, flexible compressible container; in the latter case, the nozzle support is the end of a container, or compressible bottle, in which one of the fluids is the liquid to be dispensed, and, the other fluid, the air

  contained in the vial above the liquid level.

Claims (16)

  1 distribution nozzle (1) for the distribution of a fluid to be distributed, under pressure, comprising a central supply chamber (4) disposed around an axis and a central outlet channel (7) s in communication with on the one hand with said central chamber (4) and on the other hand with the exterior, said outlet channel (7) being arranged in the axis of said central chamber (4), characterized in that the dispensing nozzle ( 1) further comprises a peripheral supply chamber (36) and a peripheral outlet channel (25) in communication on the one hand with said peripheral chamber (36) and on the other hand with the outside, said peripheral chamber ( 36) surrounding said central chamber (4) and the peripheral channel (25) surrounding said central channel (7), the two said chambers (4, 36) and said peripheral channel (25) being arranged circumferentially around said axis of said central chamber (4), the peripheral chamber (36) é both intended to be supplied by a second fluid to be dispensed, distinct from the first fluid supplying the central chamber (4), one   said first and second fluids being a gas, and the other a liquid.   2 Dispensing nozzle according to claim 1, characterized in that the central chamber (4) is defined by a central cup (2) fitted on a central nozzle (3) carried by a support (10), between the internal face ( 5) of said central cup (2) and the outer face (6) of said central end piece (3), the outlet channel   central (7) passing through the bottom of said central cup (2).   3 Dispensing nozzle according to claim 2, characterized in that the peripheral chamber (36) is defined by a peripheral cup (11) fitted on a peripheral end piece (13) carried by the support (10), between the internal face ( 12) of said peripheral cup (11), the outer face of said peripheral tip (13) and the outer face (14) of the central tip (3), the peripheral outlet channel (7) passing through the bottom of said cup peripheral (11).   4 Dispensing nozzle according to claim 3, characterized in that the central cup (2) is also   fitted inside the peripheral end piece (13).   Dispensing nozzle according to claim 3, characterized in that the peripheral cup (11) is also fitted inside an external end piece (28) of the support (10),   surrounding the peripheral end piece (13).   s 6 distribution nozzle according to one of claims 1 to   , characterized in that the central supply chamber (4)   and / or peripheral (36) is cylindrical.   7 Distribution nozzle according to one of claims 1 to   , characterized in that the central supply chamber (4)   1 o and / or peripheral (36) is conical converging towards the outside.   8 Dispensing nozzle according to one of claims 1 to   , characterized in that the central supply chamber (4)   and / or peripheral (36) is hemispherical.   9 Distribution nozzle according to one of claims 1 to   i 5 8, characterized in that the central and / or peripheral chamber is provided with fins (23, 24, 26, 27) which print on the fluid passing through it, a swirling movement.   Dispensing nozzle according to one of claims 1 to   8, characterized in that the central outlet channel (7) and / or   peripheral (25) is cylindrical.   11 Dispensing nozzle according to one of claims 1 to   8, characterized in that the central outlet channel (7) and / or peripheral (25) is conical.   12 Distribution nozzle according to claim i 1, characterized in that the central outlet channel (7) is conical, converge towards the outside.   13 Distribution nozzle according to one of claims 10   12, characterized in that the central outlet channel has a conical portion (7a) opening into the central chamber and a   cylindrical portion (7b) opening to the outside.   14 Dispensing nozzle according to claim 11, characterized in that the peripheral outlet channel (25) is   conical, diverging outwards.   Dispensing nozzle according to one of claims 1 to   14, characterized in that a cup-shaped cap (37) is fitted on the peripheral cup (11) and in the external end piece (28) of the support (10), and defines, in combination with the face outer conical (29) of the peripheral cup (11), a plurality of conical passages converging towards the outside, distributed circumferentially around the axis, each passage having an inlet and an outlet (31), said inlet further away from the 'axis and wider than said outlet (31) communicating with the outside, and said outlet (31) also communicating with the outside in the vicinity of the outlet   (25 b) of the peripheral channel (25).   16 Distribution nozzle according to one of claims 1 to   lo 15, characterized by the fact that the nozzle support (10) (1) is the push button for actuating a dispensing pump intended to equip a dispenser container, one of the two fluids being the liquid to be dispensed, present in the container and the other fluid a gas introduced into the container, especially air or nitrogen.   17 Distribution nozzle according to claim 16,   characterized by the fact that one of the two fluids is under pressure.   18 Distribution nozzle according to one of claims 1 to   , characterized in that the nozzle support (10) (1) is the dispensing valve of an aerosol can, one of the two fluids being the liquid   to distribute and the other fluid the gas propellant of the first fluid.   19 Distribution nozzle according to one of claims 1 to   , characterized in that the nozzle support (10) (1) is the end of a compressible bottle, one of the two fluids being   liquid to be dispensed and the other fluid the air contained in the bottle above the liquid level.