EP1365864B1 - Spray nozzle with profiled channels - Google Patents
Spray nozzle with profiled channels Download PDFInfo
- Publication number
- EP1365864B1 EP1365864B1 EP02701496A EP02701496A EP1365864B1 EP 1365864 B1 EP1365864 B1 EP 1365864B1 EP 02701496 A EP02701496 A EP 02701496A EP 02701496 A EP02701496 A EP 02701496A EP 1365864 B1 EP1365864 B1 EP 1365864B1
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- EP
- European Patent Office
- Prior art keywords
- swirl chamber
- coaxial
- spraying nozzle
- liquid
- channel
- 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.)
- Expired - Lifetime
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- 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
Definitions
- the present invention relates to spray nozzles liquids, into which a spray liquid is fed into a central vortex chamber through peripheral transfer tangentially injecting the liquid which swirls in the central swirl chamber and exits then from the central swirl chamber through a passage coaxial output to the atmosphere.
- Such spray nozzles are likely to be used in sprayers, in combination with pumps spraying with manual actuation or with a pushing gas, especially for spraying cosmetic products.
- spray nozzles comprising a chamber of whirling having a general form of revolution around a longitudinal axis, bounded by a peripheral wall; by one rear wall, and by a front wall pierced with a hole coaxial output.
- a coaxial circular channel surrounds the chamber swirl, and communicates with said swirling by a plurality of first transfer channels oblique devices that inject the rotating liquid into a direction of rotation in the swirl chamber.
- a plurality second transfer channels conduct the liquid from a liquid inlet and inject it into the coaxial circular channel rotating in said direction of rotation.
- the first channels of transfer are each limited by an external profile face straight which connects tangentially to the peripheral wall of the swirl chamber, and which connects angularly to the inner wall of the coaxial circular channel.
- Said first transfer channels are each limited by an inner face to straight profile and angularly connected to the wall peripheral of the swirl chamber and which connects angularly to the inner wall of the coaxial circular channel.
- the cross section of the first transfer channels is reduced gradually from the coaxial circular channel to the chamber of whirling.
- Such spray nozzles work properly for spraying low viscosity liquids such as water, producing droplets of satisfactory size, around 90 microns.
- the problem proposed by the present invention is to reduce the size of the spray droplets leaving a nozzle supplied with medium viscosity liquid or supplied with gel.
- the invention results from the observation that a reduction of the droplet sizes sprayed at the outlet of the nozzle can be obtained by promoting the acceleration of the fluid towards the peripheral wall of the swirl chamber, and avoiding as much as possible dead zones at low speed of the liquid in the channels or chambers of the spray nozzle.
- the average droplet diameter can be between about 95 microns and about 65 microns.
- a side effect of this particular structure of nozzle according to the invention is an acceptance of more tolerances high concentricity of the outlet hole with respect to the camber swirling when spraying relatively liquids viscous: spraying is excellent when the output is centered, but remains acceptable when the output is slightly off center. Good results can be obtained up to an offset offset of about 80 microns, for liquids with viscosities between 800 and 1,000 mPa.s.
- the inner face to concave profile of first transfer channel is usually circular according to a radius between one and a half and two times times the radial distance DR between the coaxial circular channel and the swirl chamber. This reduces the presence of zones dead, i.e. areas in which the liquid takes a low speed in the spray nozzle, and spraying is improved.
- the inner face to concave profile of first transfer channel connects to the wall inner coaxial circular channel by a rounded area convex. This feature also reduces the presence of dead zones, and improves spraying.
- the invention provides a. liquid sprayer, which includes a spray nozzle as defined above.
- Such a sprayer has advantages in particular when it contains a liquid to be sprayed whose viscosity is between approximately 800 and 1000 mPa.s, and whose density is between approximately 1000 and 1100 kg / m 3 .
- a spray nozzle according to the invention comprises a nozzle body 1 comprising a cylindrical housing 2 open towards the rear and closed forwards by an anterior wall 3.
- a core 4 generally cylindrical with full front 5 is engaged coaxially in the cylindrical housing 2 of the nozzle body 1, coming to bear on the rear face 6 of the front wall 3.
- Housing and grooves are provided on the face posterior 6 of the anterior wall 3, to form the chambers and spray nozzle channels according to the invention.
- a swirl chamber 7 having a general shape of revolution around the longitudinal axis I-I, limited by a peripheral wall 8, by a rear wall formed by the core 4, and by a front wall 9 pierced with a coaxial outlet hole 10.
- the spray nozzle includes at least one channel coaxial circular 11 placed around the swirl 7 and communicating with said swirl 7 by a plurality of first channels of oblique transfers such as channels 12, 13, 14 and 15.
- the first transfer channels 12-15 tangentially inject the liquid in the swirl chamber 7 by printing a rotation around the axis I-I, for example in the direction of rotation clockwise in Figure 2.
- a plurality of second transfer channels such as channels 16, 17, 18 and 19 conduct the liquid from an inlet of liquid 20 and inject it tangentially into the circular channel coaxial 11.
- the liquid In the coaxial circular channel 11, the liquid is in rotation in the same direction of rotation as in the swirl 7, i.e. clockwise shown in the example in Figure 2.
- the first transfer channels 12-15 are distributed evenly around the swirl chamber 7 and have the same shape, so that the spray nozzle has symmetry around the longitudinal axis I-I. We will describe therefore the shape of only one of the first transfer channels. This shape is as shown to scale in Figures 2 and 4, to which we can refer for more details.
- the first transfer channel 14 is limited by an outer face 21 and by an inner face 22 : the outer face 21 is the face furthest from the axis longitudinal I-I, while the inner face 22 is the face the closer to the longitudinal axis I-I.
- the outer face 21 has a generally straight profile and is connected tangentially along the connection zone 23 to the wall peripheral 8 of the swirl chamber 7.
- the inner face 22 of the first transfer channel 14 has an L1 concave profile over most of its length.
- the inner face 22 with concave profile L1 can be generally circular according to a radius advantageously included between one and a half and two times the radial distance DR between the coaxial circular channel 11 and the swirl chamber 7.
- the inner face 22 with concave profile L1 of the first channel transfer can be connected to the inner wall 35 of the channel coaxial circular 11 by a convex rounded area 24.
- the outer face 21 with a generally rectilinear profile of the first transfer channel 14 can be connected to the wall interior 35 of the coaxial circular channel 11 by a rounded area convex 25.
- the inner face 22 of concave profile L1 of first transfer channel 14 can be connected to the wall peripheral 8 of swirl chamber 7 by a zone of connection 26 rounded convex with small radius.
- the radius of curvature of the convex connection zone 26 can be understood between about 50 microns and 80 microns.
- the coaxial outlet hole 10 can advantageously be centered on the longitudinal axis I-I with a tolerance of less than Approximately 80 microns, preferably less than 60 microns.
- the exit coaxial hole 10 can be aligned with the longitudinal axis I-I with a deviation tolerance less than 4 ° approximately.
- the cross section of the first transfer channels 12-15 can advantageously be reduced gradually from coaxial circular channel 11 towards the swirl chamber 7.
- Their anterior (in the anterior wall 3) and posterior faces (anterior face 5 of the core 4) can advantageously be to make it easier to manufacture.
- the nozzle structure thus defined promotes acceleration fluid inside the channels and in the swirling, thus producing at the outlet of the nozzle a spraying with particularly fine droplets, the size of which is about 30% lower than the droplets obtained by known spray nozzles.
- a liquid sprayer 27 comprises a container 28, a pump 29 and a spray nozzle 30 as defined previously.
- the pump is activated 29 which sucks the liquid 32 from the container 28 through a dip tube 33 and injects it under pressure into the spray nozzle 30 which produces, at the outlet, a spray cone 34.
- the particular structure of the spray nozzle 30 according to the invention allows the correct operation of such a sprayer 27 containing a liquid 32 to be sprayed, the viscosity of which may be greater than that of water, which may be between 800 and 1000 mPa .s approximately, and whose density is between 1000 and 1.100 kg / m 3 approximately.
Abstract
Description
La présente invention concerne les buses de pulvérisation de liquides, dans lesquelles un liquide à pulvériser est amené dans une chambre centrale de tourbillonnement par des canaux de transfert périphériques injectant tangentiellement le liquide qui tourbillonne dans la chambre centrale de tourbillonnement et sort ensuite de la chambre centrale de tourbillonnement par un passage coaxial de sortie vers l'atmosphère.The present invention relates to spray nozzles liquids, into which a spray liquid is fed into a central vortex chamber through peripheral transfer tangentially injecting the liquid which swirls in the central swirl chamber and exits then from the central swirl chamber through a passage coaxial output to the atmosphere.
De telles buses de pulvérisation sont susceptibles d'être utilisées dans des pulvérisateurs, en association avec des pompes de pulvérisation à actionnement manuel ou avec un gaz pousseur, notamment pour la pulvérisation de produits cosmétiques.Such spray nozzles are likely to be used in sprayers, in combination with pumps spraying with manual actuation or with a pushing gas, especially for spraying cosmetic products.
On connaít déjà de telles buses de pulvérisation, décrites notamment dans le document EP 0 000 688 A, comprenant une chambre de tourbillonnement ayant une forme générale de révolution autour d'un axe longitudinal, limitée par une paroi périphérique; par une paroi postérieure, et par une paroi frontale percée d'un trou coaxial de sortie. Un canal circulaire coaxial entoure la chambre de tourbillonnement, et communique avec ladite chambre de tourbillonnement par une pluralité de premiers canaux de transfert périphériques obliques qui injectent le liquide en rotation dans un sens de rotation dans la chambre de tourbillonnement. Une pluralité de seconds canaux de transfert conduisent le liquide depuis une entrée de liquide et l'injectent dans le canal circulaire coaxial en rotation selon ledit sens de rotation. Les premiers canaux de transfert sont limités chacun par une face extérieure à profil rectiligne qui se raccorde tangentiellement à la paroi périphérique de la chambre de tourbillonnement, et qui se raccorde angulairement à la paroi intérieure du canal circulaire coaxial. Lesdits premiers canaux de transfert sont limités chacun par une face intérieure à profil rectiligne et qui se raccorde angulairement à la paroi périphérique de la chambre de tourbillonnement et qui se raccorde angulairement à la paroi intérieure du canal circulaire coaxial. La section transversale des premiers canaux de transfert se réduit progressivement depuis le canal circulaire coaxial vers la chambre de tourbillonnement.We already know such spray nozzles, described in particular in document EP 0 000 688 A, comprising a chamber of whirling having a general form of revolution around a longitudinal axis, bounded by a peripheral wall; by one rear wall, and by a front wall pierced with a hole coaxial output. A coaxial circular channel surrounds the chamber swirl, and communicates with said swirling by a plurality of first transfer channels oblique devices that inject the rotating liquid into a direction of rotation in the swirl chamber. A plurality second transfer channels conduct the liquid from a liquid inlet and inject it into the coaxial circular channel rotating in said direction of rotation. The first channels of transfer are each limited by an external profile face straight which connects tangentially to the peripheral wall of the swirl chamber, and which connects angularly to the inner wall of the coaxial circular channel. Said first transfer channels are each limited by an inner face to straight profile and angularly connected to the wall peripheral of the swirl chamber and which connects angularly to the inner wall of the coaxial circular channel. The cross section of the first transfer channels is reduced gradually from the coaxial circular channel to the chamber of whirling.
De telles buses de pulvérisation fonctionnent correctement pour la pulvérisation de liquides à faible viscosité tels que l'eau, en produisant des gouttelettes de tailles satisfaisantes, de l'ordre de 90 microns.Such spray nozzles work properly for spraying low viscosity liquids such as water, producing droplets of satisfactory size, around 90 microns.
Cependant, de telles buses de pulvérisation produisent une pulvérisation très insuffisante, c'est-à-dire des tailles de gouttelettes beaucoup trop grosses, lorsque le liquide à pulvériser présente une viscosité plus grande que celle de l'eau. Ce défaut empêche l'utilisation satisfaisante de telles buses de pulvérisation pour la pulvérisation de produits cosmétiques ayant des viscosités moyennes, par exemple des viscosités supérieures à 800 mPa.s.However, such spray nozzles produce a very insufficient spraying, i.e. much too large droplets when the liquid to be sprayed has a higher viscosity than that of water. This defect prevents the satisfactory use of such nozzles spray for spraying cosmetic products having medium viscosities, for example viscosities greater than 800 mPa.s.
En outre, dans une fabrication en série, on constate que les qualités de pulvérisation varient considérablement en fonction des buses considérées. Cela résulte vraisemblablement des variations de dimensions des buses à l'intérieur des tolérances de fabrication.In addition, in mass production, it can be seen that spray qualities vary considerably depending nozzles considered. This is likely due to variations in nozzle sizes within tolerances of manufacturing.
Le problème proposé par la présente invention est de réduire la taille des gouttelettes pulvérisées en sortie d'une buse alimentée en liquide à viscosité moyenne ou alimentée en gel.The problem proposed by the present invention is to reduce the size of the spray droplets leaving a nozzle supplied with medium viscosity liquid or supplied with gel.
L'invention résulte de l'observation selon laquelle une réduction des tailles de gouttelettes pulvérisées en sortie de la buse peut être obtenue en favorisant l'accélération du fluide vers la paroi périphérique de la chambre de tourbillonnement, et en évitant autant que possible les zones mortes à faible vitesse du liquide dans les canaux ou chambres de la buse de pulvérisation.The invention results from the observation that a reduction of the droplet sizes sprayed at the outlet of the nozzle can be obtained by promoting the acceleration of the fluid towards the peripheral wall of the swirl chamber, and avoiding as much as possible dead zones at low speed of the liquid in the channels or chambers of the spray nozzle.
Pour atteindre ces objets ainsi que d'autres, une buse de pulvérisation selon l'invention, pour la pulvérisation de liquides, comprend :
- une chambre de tourbillonnement ayant une forme générale de révolution autour d'un axe longitudinal, limitée par une paroi périphérique, par une paroi postérieure, et par une paroi frontale percée d'un trou coaxial de sortie,
- au moins un canal circulaire coaxial agencé autour de la chambre de tourbillonnement et communiquant avec ladite chambre de tourbillonnement par une pluralité de premiers canaux de transfert obliques injectant le liquide en rotation dans un sens de rotation dans la chambre de tourbillonnement,
- une pluralité de seconds canaux de transfert pour conduire le liquide depuis une entrée de liquide et l'injecter dans le canal circulaire coaxial en rotation selon ledit sens de rotation,
- les premiers canaux de transfert sont limités chacun par une face extérieure à profil généralement rectiligne et se raccordant tangentiellement à la paroi périphérique de la chambre de tourbillonnement,
- les premiers canaux de transfert sont limités chacun par une face intérieure ayant un profil concave sur la plus grande partie de sa longueur.
- a swirl chamber having a general shape of revolution around a longitudinal axis, bounded by a peripheral wall, by a rear wall, and by a front wall pierced with a coaxial outlet hole,
- at least one coaxial circular channel arranged around the swirl chamber and communicating with said swirl chamber by a plurality of first oblique transfer channels injecting the liquid in rotation in a direction of rotation into the swirl chamber,
- a plurality of second transfer channels for conducting the liquid from a liquid inlet and injecting it into the coaxial circular channel in rotation in said direction of rotation,
- the first transfer channels are each limited by an outer face with a generally rectilinear profile and tangentially connecting to the peripheral wall of the swirl chamber,
- the first transfer channels are each limited by an inner face having a concave profile over most of its length.
Avec une telle structure de buse de pulvérisation, on constate que les tailles de gouttelettes pulvérisées en sortie de la buse sont nettement plus faibles que celles obtenues par les buses de l'art antérieur mentionné ci-dessus. On estime que l'on gagne environ 30 % sur la taille des gouttelettes pulvérisées en sortie. Pour des liquides à viscosité moyenne, par exemple comprise entre 800 et 1 000 mPa.s, le diamètre moyen des gouttelettes peut être compris entre 95 microns environ et 65 microns environ.With such a spray nozzle structure, notes that the droplet sizes sprayed at the outlet of the nozzle are significantly weaker than those obtained by the nozzles of the prior art mentioned above. It is believed that saves about 30% on the size of the spray droplets in exit. For liquids with medium viscosity, for example included between 800 and 1000 mPa.s, the average droplet diameter can be between about 95 microns and about 65 microns.
Un effet secondaire de cette structure particulière de buse selon l'invention est une acceptation de tolérances plus élevées de concentricité du trou de sortie par rapport à la cambre de tourbillonnement lorsqu'on pulvérise des liquides relativement visqueux : la pulvérisation est excellente lorsque le trou de sortie est centré, mais elle reste acceptable lorsque le trou de sortie est légèrement décentré. De bons résultats peuvent être obtenus jusqu'à un écart de décentrage d'environ 80 microns, pour des liquides dont la viscosité est comprise entre 800 et 1 000 mPa.s.A side effect of this particular structure of nozzle according to the invention is an acceptance of more tolerances high concentricity of the outlet hole with respect to the camber swirling when spraying relatively liquids viscous: spraying is excellent when the output is centered, but remains acceptable when the output is slightly off center. Good results can be obtained up to an offset offset of about 80 microns, for liquids with viscosities between 800 and 1,000 mPa.s.
A l'inverse, dans les buses de pulvérisation connues, un décentrage du trou de sortie entraíne une dégradation sensible de la pulvérisation. Conversely, in known spray nozzles, a decentering the outlet hole leads to significant degradation of spraying.
Selon un mode de réalisation préféré, la face intérieure à profil concave de premier canal de transfert est généralement circulaire selon un rayon compris entre une fois et demie et deux fois la distance radiale DR entre le canal circulaire coaxial et la chambre de tourbillonnement. On réduit ainsi la présence de zones mortes, c'est-à-dire de zones dans lesquelles le liquide prend une faible vitesse dans la buse de pulvérisation, et la pulvérisation s'en trouve améliorée.According to a preferred embodiment, the inner face to concave profile of first transfer channel is usually circular according to a radius between one and a half and two times times the radial distance DR between the coaxial circular channel and the swirl chamber. This reduces the presence of zones dead, i.e. areas in which the liquid takes a low speed in the spray nozzle, and spraying is improved.
Selon une réalisation avantageuse, la face intérieure à profil concave de premier canal de transfert se raccorde à la paroi intérieure de canal circulaire coaxial par une zone arrondie convexe. Cette caractéristique réduit également la présence de zones mortes, et améliore la pulvérisation.According to an advantageous embodiment, the inner face to concave profile of first transfer channel connects to the wall inner coaxial circular channel by a rounded area convex. This feature also reduces the presence of dead zones, and improves spraying.
Pour les mêmes raisons, on peut également préférer une face extérieure à profil généralement rectiligne de premier canal de transfert qui se raccorde à la paroi intérieure de canal circulaire coaxial par une zone arrondie convexe.For the same reasons, we may also prefer a exterior face with generally straight first channel profile transfer which connects to the inner channel wall circular coaxial by a convex rounded area.
Enfin, on peut trouver avantage, pour améliorer la pulvérisation, à prévoir que la face intérieure à profil concave de premier canal de transfert se raccorde à la paroi périphérique de chambre de tourbillonnement par une zone de raccordement arrondie convexe.Finally, we can find advantage, to improve the spraying, provide that the concave profile interior face of first transfer channel connects to the peripheral wall of Swirl chamber by a rounded connection area convex.
L'invention prévoit un. pulvérisateur de liquides, qui comprend une buse de pulvérisation telle que définie ci-dessus.The invention provides a. liquid sprayer, which includes a spray nozzle as defined above.
Un tel pulvérisateur présente des avantages en particulier lorsqu'il contient un liquide à pulvériser dont la viscosité est comprise entre 800 et 1 000 mPa.s environ, et dont la densité est comprise entre 1 000 et 1 100 kg/m3 environ.Such a sprayer has advantages in particular when it contains a liquid to be sprayed whose viscosity is between approximately 800 and 1000 mPa.s, and whose density is between approximately 1000 and 1100 kg / m 3 .
D'excellents résultats sont obtenus lorsque le pulvérisateur contient un liquide thixotrope.Excellent results are obtained when the sprayer contains a thixotropic liquid.
D'autres objets, caractéristiques et avantages de la présente invention ressortiront de la description suivante de modes de réalisation particuliers, faite en relation avec les figures jointes, parmi lesquelles:
- la figure 1 est une vue de côté globale en coupe longitudinale d'une buse de pulvérisation selon un mode de réalisation particulier de l'invention ;
- la figure 2 est une coupe transversale à plus grande échelle selon le plan A-A de la figure 1 ;
- la figure 3 est une vue à plus grande échelle de la zone antérieure de la buse de pulvérisation de figure 1, en coupe selon la surface C-C de la figure 2 ;
- la figure 4 est une vue partielle de la figure 2, montrant à plus grande échelle la courbure des faces de canaux ; et
- la figure 5 est une vue schématique générale d'un pulvérisateur selon l'invention.
- Figure 1 is an overall side view in longitudinal section of a spray nozzle according to a particular embodiment of the invention;
- Figure 2 is a cross section on a larger scale along the plane AA of Figure 1;
- Figure 3 is an enlarged view of the front region of the spray nozzle of Figure 1, in section along the surface CC of Figure 2;
- Figure 4 is a partial view of Figure 2, showing on a larger scale the curvature of the channel faces; and
- Figure 5 is a general schematic view of a sprayer according to the invention.
Dans le mode de réalisation illustré sur les figures, une
buse de pulvérisation selon l'invention comprend un corps de buse 1
comportant un logement cylindrique 2 ouvert vers l'arrière et
obturé vers l'avant par une paroi antérieure 3. Un noyau 4
généralement cylindrique à face antérieure 5 pleine est engagé
coaxialement dans le logement cylindrique 2 du corps de buse 1,
venant en appui sur la face postérieure 6 de la paroi antérieure 3.In the embodiment illustrated in the figures, a
spray nozzle according to the invention comprises a nozzle body 1
comprising a cylindrical housing 2 open towards the rear and
closed forwards by an
Des logements et rainures sont prévus sur la face
postérieure 6 de la paroi antérieure 3, pour former les chambres et
canaux de la buse de pulvérisation selon l'invention. On distingue
ainsi une chambre de tourbillonnement 7, ayant une forme générale
de révolution autour de l'axe longitudinal I-I, limitée par une
paroi périphérique 8, par une paroi postérieure formée par le noyau
4, et par une paroi frontale 9 percée d'un trou coaxial de sortie
10.Housing and grooves are provided on the face
posterior 6 of the
La buse de pulvérisation comprend au moins un canal
circulaire coaxial 11 placé autour de la chambre de
tourbillonnement 7 et communiquant avec ladite chambre de
tourbillonnement 7 par une pluralité de premiers canaux de
transfert obliques tels que les canaux 12, 13, 14 et 15. Les
premiers canaux de transfert 12-15 injectent tangentiellement le
liquide dans la chambre de tourbillonnement 7 en lui imprimant une
rotation autour de l'axe I-I, par exemple dans le sens de rotation
des aiguilles d'une montre sur la figure 2. The spray nozzle includes at least one channel
Une pluralité de seconds canaux de transfert tels que les
canaux 16, 17, 18 et 19 conduisent le liquide depuis une entrée de
liquide 20 et l'injectent tangentiellement dans le canal circulaire
coaxial 11. Dans le canal circulaire coaxial 11, le liquide est en
rotation dans le même sens de rotation que dans la chambre de
tourbillonnement 7, c'est-à-dire dans le sens des aiguilles d'une
montre dans l'exemple de la figure 2.A plurality of second transfer channels such as
Les premiers canaux de transfert 12-15 sont répartis
équitablement autour de la chambre de tourbillonnement 7 et
présentent la même forme, afin que la buse de pulvérisation
présente une symétrie autour de l'axe longitudinal I-I. On décrira
donc la forme d'un seul des premiers canaux de transfert. Cette
forme est telle que représentée à l'échelle sur les figures 2 et 4,
auxquelles on pourra se référer pour plus de détails.The first transfer channels 12-15 are distributed
evenly around the
Ainsi, sur la figure 4, le premier canal de transfert 14
est limité par une face extérieure 21 et par une face intérieure 22
: la face extérieure 21 est la face la plus éloignée de l'axe
longitudinal I-I, tandis que la face intérieure 22 est la face la
plus proche de l'axe longitudinal I-I. La face extérieure 21
présente un profil généralement rectiligne et se raccorde
tangentiellement selon la zone de raccordement 23 à la paroi
périphérique 8 de la chambre de tourbillonnement 7.Thus, in FIG. 4, the
La face intérieure 22 du premier canal de transfert 14
présente un profil concave L1 sur la plus grande partie de sa
longueur.The
La face intérieure 22 à profil concave L1 peut être
généralement circulaire selon un rayon avantageusement compris
entre une fois et demie et deux fois la distance radiale DR entre
le canal circulaire coaxial 11 et la chambre de tourbillonnement 7.The
La face intérieure 22 à profil concave L1 de premier canal
de transfert peut se raccorder à la paroi intérieure 35 du canal
circulaire coaxial 11 par une zone arrondie convexe 24.The
La face extérieure 21 à profil généralement rectiligne du
premier canal de transfert 14 peut se raccorder à la paroi
intérieure 35 du canal circulaire coaxial 11 par une zone arrondie
convexe 25. The
Enfin, la face intérieure 22 à profil concave L1 de
premier canal de transfert 14 peut se raccorder à la paroi
périphérique 8 de chambre de tourbillonnement 7 par une zone de
raccordement 26 arrondie convexe à faible rayon. Le rayon de
courbure de la zone de raccordement 26 convexe peut être compris
entre 50 microns et 80 microns environ.Finally, the
Le trou coaxial de sortie 10 peut avantageusement être
centré sur l'axe longitudinal I-I selon une tolérance inférieure à
80 microns environ, de préférence inférieure à 60 microns.The
De même, le trou coaxial de sortie 10 peut être aligné sur
l'axe longitudinal I-I avec une tolérance de déviation inférieure à
4° environ.Likewise, the exit
La section transversale des premiers canaux de transfert
12-15 peut avantageusement se réduire progressivement depuis le
canal circulaire coaxial 11 vers la chambre de tourbillonnement 7.
Leurs faces antérieure (dans la paroi antérieure 3) et postérieure
(face antérieure 5 du noyau 4) peuvent avantageusement être
parallèles, pour en faciliter la fabrication.The cross section of the first transfer channels
12-15 can advantageously be reduced gradually from
coaxial
La structure de buse ainsi définie favorise l'accélération du fluide à l'intérieur des canaux et dans la chambre de tourbillonnement, produisant ainsi en sortie de la buse une pulvérisation à gouttelettes particulièrement fines, dont la taille est inférieure d'environ 30 % par rapport aux gouttelettes obtenues par les buses de pulvérisation connues.The nozzle structure thus defined promotes acceleration fluid inside the channels and in the swirling, thus producing at the outlet of the nozzle a spraying with particularly fine droplets, the size of which is about 30% lower than the droplets obtained by known spray nozzles.
Les dimensions générales de la buse de pulvérisation selon l'invention peuvent être choisies en fonction du débit désiré de liquide. On peut notamment réaliser des buses de pulvérisation de petite taille pour les applications cosmétiques, ayant par exemple les principales dimensions suivantes :
- diamètre de chambre de tourbillonnement : 1 mm environ ;
- longueur de chambre de tourbillonnement : 0,19 mm environ ;
- diamètre intérieur du canal circulaire : 2,4 mm environ ;
- diamètre extérieur du canal circulaire : 3 mm environ.
- diameter of the swirl chamber: about 1 mm;
- length of swirl chamber: about 0.19 mm;
- inside diameter of the circular channel: about 2.4 mm;
- outer diameter of the circular channel: about 3 mm.
Dans la réalisation illustrée schématiquement sur la
figure 5, un pulvérisateur de liquide 27 comprend un récipient 28,
une pompe 29 et une buse de pulvérisation 30 telle que définie
précédemment. Par actionnement du bouton 31, on actionne la pompe
29 qui aspire le liquide 32 du récipient 28 par un tube plongeur 33
et l'injecte sous pression dans la buse de pulvérisation 30 qui
produit, en sortie, un cône de pulvérisation 34.In the embodiment illustrated schematically on the
FIG. 5, a
La structure particulière de buse de pulvérisation 30
selon l'invention permet le fonctionnement correct d'un tel
pulvérisateur 27 contenant un liquide 32 à pulvériser dont la
viscosité peut être supérieure à celle de l'eau, pouvant être
comprise entre 800 et 1 000 mPa.s environ, et dont la densité est
comprise entre 1 000 et 1.100 kg/m3 environ.The particular structure of the
De bons résultats peuvent également être obtenus lorsque le liquide 32 présente des propriétés thixotropes.Good results can also be obtained when the liquid 32 has thixotropic properties.
La présente invention n'est pas limitée aux modes de réalisation qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendications ci-après.The present invention is not limited to the modes of which have been explicitly described, but it includes the various variants and generalizations contained in the field of the claims below.
Claims (11)
- Spraying nozzle for spraying liquids, including :characterized in that:a swirl chamber (7) generally round shaped around a longitudinal axis (I-I), limited by a peripheral wall (8), by a posterior wall (4), and by a front wall (9) having a coaxial drilled exit hole (10),at least one coaxial circular channel (11) disposed around the swirl chamber (7) and communicating with said swirl chamber (7) by a plurality of first oblique transfer channels (12-15) injecting the liquid in rotation in a direction of rotation in the swirl chamber (7),a plurality of second transfer channels (16-19) for leading the liquid from a liquid inlet (20) and for injecting it into the coaxial circular channel (11) in rotation according to the said direction of rotation,the first transfer channels (12-15) are each limited by an outer face (21) having a generally rectilinear profile and being tangentially connected to the peripheral wall (8) of the swirl chamber (7),the first transfer channels (12-15) are each limited by an inner face (22) having a concave profile (L1) along the greatest part of its length.
- Spraying nozzle according to claim 1, characterized in that the inner face (22) having a concave profile (L1) of first transfer channel (12-15) is generally circular according to a radius ranging between once and a half and twice the radial distance (DR.) between the coaxial circular channel (11) and the swirl chamber (7).
- Spraying nozzle according to claims 1 or 2, characterized in that the inner face (22) having a concave profile (L1) of first transfer channel (12-15) is connected to the inner wall (35) of coaxial circular channel (11) by a convex rounded zone (24).
- Spraying nozzle according to any of claims 1 to 3, characterized in that the outer face (21) with a generally rectilinear profile of first transfer channel (12-15) is connected to the inner wall (35) of coaxial circular channel (11) by a convex rounded zone (25).
- Spraying nozzle according to any of claims 1 to 4, characterized in that the inner face (22) having a concave profile (L1) of first transfer channel (12-15) is connected to the peripheral wall (8) of swirl chamber (7) by a convex rounded connection zone (26).
- Spraying nozzle according to claim 5, characterized in that the curvature radius of the convex connection zone (26) is between about 50 microns and about 80 microns.
- Spraying nozzle according to any of claims 1 to 6, characterized in that the coaxial exit hole (10) is centered on the longitudinal axis (I-I) according to a tolerance lower than approximately 80 microns, preferably lower than 60 microns.
- Spraying nozzle according to claim 7, characterized in that the coaxial exit hole (10) is aligned on the longitudinal axis (I-I) with a deviation tolerance lower than approximately 4°.
- Sprayer of liquids (27), including a spraying nozzle (30) according to any of claims 1 to 8.
- Sprayer (27) according to claim 9, characterized in that it contains a liquid (32) to be sprayed whose viscosity is between about 800 and about 1000 mPa.s, and whose density is between about 1000 and about 1100 kg/m3.
- Sprayer (27) according to claims 9 or 10, characterized in that it contains a thixotropic liquid.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0103129A FR2821573B1 (en) | 2001-03-05 | 2001-03-05 | PROFILED CHANNEL SPRAY NOZZLE |
| FR0103129 | 2001-03-05 | ||
| PCT/IB2002/000658 WO2002070141A1 (en) | 2001-03-05 | 2002-03-04 | Spray nozzle with profiled channels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1365864A1 EP1365864A1 (en) | 2003-12-03 |
| EP1365864B1 true EP1365864B1 (en) | 2004-10-20 |
Family
ID=8860863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02701496A Expired - Lifetime EP1365864B1 (en) | 2001-03-05 | 2002-03-04 | Spray nozzle with profiled channels |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1365864B1 (en) |
| AT (1) | ATE279988T1 (en) |
| DE (1) | DE60201663D1 (en) |
| FR (1) | FR2821573B1 (en) |
| WO (1) | WO2002070141A1 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2858568B1 (en) * | 2003-08-08 | 2006-09-15 | Valois Sas | LIQUID SPRAY HEAD |
| AU2007222673A1 (en) | 2006-03-07 | 2007-09-13 | Boehringer Ingelheim International Gmbh | Swirl |
| FR2904573B1 (en) * | 2006-08-04 | 2008-12-05 | Rexam Dispensing Systems Sas | SPRAY NOZZLE, DISPENSING DEVICE COMPRISING SUCH A NOZZLE, DISPENSER COMPRISING SUCH A DISPENSING ORGAN AND USE OF SUCH A NOZZLE. |
| EP2077132A1 (en) | 2008-01-02 | 2009-07-08 | Boehringer Ingelheim Pharma GmbH & Co. KG | Dispensing device, storage device and method for dispensing a formulation |
| JP5670421B2 (en) | 2009-03-31 | 2015-02-18 | ベーリンガー インゲルハイム インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Component surface coating method |
| JP5763053B2 (en) | 2009-05-18 | 2015-08-12 | ベーリンガー インゲルハイム インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Adapter, inhaler and atomizer |
| US10016568B2 (en) | 2009-11-25 | 2018-07-10 | Boehringer Ingelheim International Gmbh | Nebulizer |
| WO2011064163A1 (en) | 2009-11-25 | 2011-06-03 | Boehringer Ingelheim International Gmbh | Nebulizer |
| JP5715640B2 (en) | 2009-11-25 | 2015-05-13 | ベーリンガー インゲルハイム インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Nebulizer |
| US9943654B2 (en) | 2010-06-24 | 2018-04-17 | Boehringer Ingelheim International Gmbh | Nebulizer |
| WO2012130757A1 (en) | 2011-04-01 | 2012-10-04 | Boehringer Ingelheim International Gmbh | Medical device comprising a container |
| WO2016025858A1 (en) * | 2014-08-15 | 2016-02-18 | Bowles Fluidics Corporation | Multi-inlet, multi-spray fluidic cup nozzle with shared interaction region and spray generation method |
| US11154876B2 (en) | 2011-04-19 | 2021-10-26 | Dlhbowles, Inc. | Multi-inlet, multi-spray fluidic cup nozzle with shared interaction region and spray generation method |
| US9827384B2 (en) | 2011-05-23 | 2017-11-28 | Boehringer Ingelheim International Gmbh | Nebulizer |
| WO2013152894A1 (en) | 2012-04-13 | 2013-10-17 | Boehringer Ingelheim International Gmbh | Atomiser with coding means |
| WO2015018904A1 (en) | 2013-08-09 | 2015-02-12 | Boehringer Ingelheim International Gmbh | Nebulizer |
| EP2835146B1 (en) | 2013-08-09 | 2020-09-30 | Boehringer Ingelheim International GmbH | Nebulizer |
| PL3139979T3 (en) | 2014-05-07 | 2023-12-27 | Boehringer Ingelheim International Gmbh | Unit, nebulizer and method |
| JP6745225B2 (en) | 2014-05-07 | 2020-08-26 | ベーリンガー インゲルハイム インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Container, display device, and nebulizer |
| ES2874029T3 (en) | 2014-05-07 | 2021-11-04 | Boehringer Ingelheim Int | Nebulizer |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1431526A (en) * | 1921-04-09 | 1922-10-10 | Duriron Co | Spray nozzle |
| GB760972A (en) * | 1953-03-27 | 1956-11-07 | Josef Cornel Breinl | Improvements in and relating to spray nozzles |
| GB760792A (en) * | 1953-10-13 | 1956-11-07 | Louis Eugene Widolt Montrose O | Improvements in or relating to floating vessels |
| US4260110A (en) * | 1977-02-18 | 1981-04-07 | Winfried Werding | Spray nozzle, devices containing the same and apparatus for making such devices |
| IT1094411B (en) | 1977-08-02 | 1985-08-02 | Werding Winfried J | SPRAY NOZZLE, DEVICES INCLUDING SUCH NOZZLE AND PROCEDURE FOR THEIR PRODUCTION |
| DE3710788A1 (en) * | 1987-03-31 | 1988-11-10 | Wolfgang Fuhrig | Hand-pressure atomiser |
| IT1219735B (en) * | 1988-06-28 | 1990-05-24 | Sar Spa | NEBULIZER NOZZLE PAD FOR HAND PUMPS, PARTICULARLY FOR LACQUER |
| ES2126753T3 (en) * | 1993-05-25 | 1999-04-01 | Verbena Corp N V | SPRAY NOZZLE FOR THE REGULATION OF THE PASS VOLUME PER UNIT OF TIME. |
| FR2772644B1 (en) * | 1997-12-24 | 2000-02-04 | D Investissement Ind Et Commer | SPRAY NOZZLE WITH STATIC MEANS OF FLOW INHIBITION |
-
2001
- 2001-03-05 FR FR0103129A patent/FR2821573B1/en not_active Expired - Fee Related
-
2002
- 2002-03-04 WO PCT/IB2002/000658 patent/WO2002070141A1/en not_active Application Discontinuation
- 2002-03-04 EP EP02701496A patent/EP1365864B1/en not_active Expired - Lifetime
- 2002-03-04 DE DE60201663T patent/DE60201663D1/en not_active Expired - Lifetime
- 2002-03-04 AT AT02701496T patent/ATE279988T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2821573B1 (en) | 2003-06-13 |
| ATE279988T1 (en) | 2004-11-15 |
| FR2821573A1 (en) | 2002-09-06 |
| WO2002070141A8 (en) | 2003-08-14 |
| WO2002070141A1 (en) | 2002-09-12 |
| DE60201663D1 (en) | 2004-11-25 |
| EP1365864A1 (en) | 2003-12-03 |
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