IE48169B1 - Atomizing nozzle - Google Patents

Abstract

Eine Spritzdüse zur Ausgabe einer unter Ueberdruck stehenden Flüssigkeit in Form einer Sprühwolke ohne Verwendung von Treibgas oder einer Luftpumpe, die so gestaltet ist, dass sie mit niederem Druck eine hohe Sprühqualität des zu zerstäubenden Produktes ermöglicht. Dies wird dadurch erreicht, dass im hohlen Düseninnern mindestens zwei Turbulenzstufen vorgesehen sind und dass zwischen einer in Strömungsrichtung vorangehenden und der ihr direkt nachfolgenden Trubulenzstufe in der Seitenwandung des hohlen Düseninneren mindestens ein zum Break-up der von der vorangehenden zur nachfolgenden Turbulenzstufe strömenden Flüssigkeit dienendes Hindernis (18a, 24a) vorgesehen ist, weiches die strömende Flüssigkeit aus einer sich durch die Ringkammer (13) senkrecht zur Düsenmittelachse (MA) erstreckende Strömungsebene heraus in Richtung zum Düsenauslass (3) hin unter einem Winkel von bis zu 90° ablenkt.

Description

The invention relates to an atomizing nozzle for dispensing a liquid which is subject to an elevated pressure in the form of a spray comprising at least two parts, which frontally adjoin each other radially to the axis of the outlet orifice present in one of the parts, between the parts being arranged an axially symmetrical flowing path system, which centrically has an outlet chamber, with several ducts ending therein in the main tangentially from a surrounding annular chamber in which ducts further ducts ending essentially right-angled in the former from an outward and axial direction are provided, through which the pressurized liquid is led from the exterior to the flowing path system.

An atomizing nozzle of the type described at the beginning is known from the FR-A-2 325 434 in which the spraying head contains annular channels and a central chamber of turbulence, in order to split up the product to be sprayed into the finest particle size possible. This spraying head, however, has several disadvantages, the most significant one of which is that it permits an uncontrolled flow of the product within the turbulence chamber. Furthermore, it provides no means to increase the flow -348169 velocity of the product towards the outlet. Therefore, this spraying head is inadequate for dispensing products in fine particle sizes when they are stored under a relatively low pressure and without the utilization of propellant gas.

Another known atomizing nozzle has been disclosed in U.S. Patent 3,652,018 by John Richard Focht and is used for the mechanical break-up of a liquid stream, a spray mist of droplets being formed. This known nozzle is easier to manufacture than a nozzle which is designed to have similar basic features and is described in U.S. Patent 3,083,917 by Robert Abplanalp et al. The feed channels of the known Focht nozzle are separated from one another by separating elements, such as baffles; they start from a common outer annular chamber and end in a common central outlet orifice.

The arrangement of four feed channels which, starting from an outer annular chamber, tangentially open in the wall of a central cylindrical mixing chamber in order to effect an improved atomization of liquid material, has also been disclosed already in U.S. Patent 1,594,641 by Fletcher Coleman Starr in 1926. -4However, these known spray nozzles do not adequately meet the requirements which have to be fulfilled by many products to be sprayed, such as hair lacquer, deodorants, air fresheners or insecticides. Thus, they should have a particle size between 5 and 10 μ, for example particularly in the case of hair lacquer, in order to obtain a rapid evaporation period, so that matting of strands of hair is avoided when the consumer pats the set into place after spraying. Air fresheners and insecticides must evaporate rapidly or float in the air so that they do not stain furniture, walls, carpets or parquet floors. In spite of a very fine particle size, the sprayed product must also possess a sufficiently strong impingement force, in the case of hair lacquer, so that the latter not only comes to lie on the hair but can also penetrate in between which ensures an airy set. In the case of air fresheners and insecticides, the spray mist should penetrate as far as possible into the air space to be treated.

Commercially available atomizing nozzles, such as are available for aerosol cans or pump atomizers, require a pressure of at least 6 atmospheres gauge for producing spray mists of the said quality, when they are used without a liquefied gas component, or they require about 3 atmospheres gauge when such a component is present -5since, as is known, a propellant consisting of liquefied gas is pressure-relieved in contact with the surrounding air and thus decisively contributes to the formation of the fine droplet size in the spray mist.

Since, however, the spray nozzle according to the invention is preferably to be used for atomization, free from liquefied gas, without an air pump and without other propellants (i.e. in propellantless dispensers), in which case, however, a maximum of 2.4 atmospheres gauge, or sometimes even less pressure, depending on the storage period, is available, it is necessary to design the nozzle in such a way that it is capable, under a relatively low pressure, of providing the required spray quality and, on the other hand, is at the same time simple and cheap to manufacture, whilst it is intended that, if liquefied gas is present in the product and the pressures are correspondingly higher, a hitherto unknown, substantially increased fineness of the particles in the spray mist is to be achieved using this nozzle.

According to the invention there is provided an atomizing nozzle for dispensing a liquid, which is subject to an elevated pressure, in the form of a spray, comprising at least two parts, which frontally adjoin each other radially to the axis (MA) of an outlet orifice present in -6one of the parts, between the parts being arranged an axially symmetrical flowing path system which centrically has an outlet chamber with several ducts ending therein in the main tangentially from a surrounding annular chamber, in the ducts further ducts ending essentially right-angled in the former from an outward and axial direction are provided, through which the pressurized liquid is led from the exterior to the flowing path system wherein there is provided a peg-like deviating projection situated centrically in the outlet chamber opposite to the outlet orifice protruding near to the outlet orifice and/or there is arranged in at least one of the tangential ducts a deviating projection.

In one embodiment of the invention the part with the outlet orifice is designed as a pot-shaped case into which the other part is inserted as a plug.

In another embodiment of the invention for the supply of the tangential ducts leading to the said annular chamber there is provided a further surrounding annular chamber, which in turn is supplied by ducts ending therein from an outward and in the main tangential direction.

Preferably, in each case a duct leading tangentially to an -748169 annular chamber ends in the flowing direction of the annular chamber just a short distance upstream of the inlet orifice in a duct leading out of that same annular chamber.

In a further embodiment of the invention, the outlet cross section of each tangential duct is at its point of opening into the annular chamber a third of the latter's cross section at the most. Preferably, there extends a collar-like annular rib surrounding the outlet orifice and reaching up to the outlet chamber. Advantageously, the axial distance from the front face of the peg-like projection to the opening of the outlet orifice is 0.1 mm at the most.

In another embodiment of the invention the axial distance from the front face of the peg-like projection to the front face of the annular rib is 0.05 mm at the most.

In the following description, preferred embodiments of the invention are described in conjunction with the drawings in which:Figure 1 is a longitudinal sectional view of an atomizer head with two-part embodiment of the atomizing nozzle according to the invention, Figure 2 is a cross-sectional view of the nozzle insert of the preceding embodiment, along a plane indicated in Figure 1 by ΊΤ-ΤΓ, (the cutting plane of Figure 1 is indicated in Figure 2 by T-T) and on an enlarged scale, Figure 3 is a longitudinal sectional view of the nozzle core of the embodiment, shown in Figure 2 along a plane indicated in Figure 2 by ΤΤΤ-7ΤΓ, Figure 4 is a longitudinal sectional view of a nozzle case of the atomizing nozzle which fits on to the insert cores of Figures 2 and 3, „ 48169 -8Figure 5 is a longitudinal sectional view of a central region of the nozzle assembled from the components according to Figures 3 and 4, on an enlarged scale; Figure 6 is a cross-sectional view of an embodiment similar to that shown in Figures 2 to 5 but having six axial ducts and six radial ducts connected to the former in a right angle; Figure 7 is a cross-sectional view of a further 10 embodiment of the nozzle core, having three stages of turbulence, Figure 8 is a longitudinal sectional view of the nozzle core shown in Figure 7, Figure 9 is a cross-sectional view of a nozzle core 15 similar to that shown in Figure 2, but having additional inlet ducts for introducing a second medium, Figure 10 is a longitudinal sectional view of an embodiment of the atomizing nozzle having a nozzle core as shown in Figure 9 and an inlet valve and -948168 inlet ducts for a second medium, Figure Π is a frontal view, partially in section, of an embodiment of the atomizing nozzle having an eject channel, an annular suction channel and a control valve as shown in Figure 10, Figure 12 is a view similar to that of Figure 11, but having several suction orifices for a second medium without a control valve, and Figure 13 is a longitudinal sectional view of another preferred embodiment of an atomizer head containing atomizing nozzle according to the invention.

The dispenser actuating head 30, shown in Fig. 1 in longitudinal section, contains in its side wall 30a a recess 31 into which the atomizing nozzle is inserted, which is shown in a preferred embodiment and which consists of a nozzle case in the form of a pot-shaped housing 33 and a nozzle core or plug 32 fitted into the recess 33a provided in the inner end wall of the nozzle case 33. The nozzle core 32 carries depressions formed in its front end face 32a, which is in sealing contact with the bottom 33b of the recess 33a and faces the nozzle -10outlet 41, and in its lateral peripheral wall 32b which is in close contact with the side wall 33c of the recess 33a, which depressions form the hollow nozzle interior consisting of annular chambers and channels or ducts when the nozzle is produced by assembling the nozzle core 32 and the nozzle case (nozzle shell or mantle) 33.

The said depressions are specially illustrated in the representations of the nozzle core 32 according to Figures 2 and 3.

The actuating head 30 carries on its underside a sleeve piece or neck part 34, which is open downwards and into which the valve shaft of an aerosol spray can be inserted in a known manner. The interior of the sleeve piece 34 forms the main supply channel 27, from the upper end zone of which in the actuating head 30 four axial supply channels or ducts 35, which are formed by longitudinal grooves in the peripheral wall 32b of the nozzle core 32 lead in the axial direction with respect to the central axis MA of the nozzle and ending right-angled in depressions or ducts in the end face 32a, which form the turbulence system of the nozzle. The latter comprises as can be seen from Figure 2, four tangential ducts 36 which are each connected by their inlet orifice 36a to the front end of one of the axial ducts 35 in a right angle and each of which run skew nto the central axis of the nozzle in a plane, intersecting this axis at a right angle, and open tangentially from outside into a common first most outwardly situated annular chamber 37, their mouths (or outlet orifices) 36b being symmetrically distributed around the outer peripheral wall 37a of the annular chamber 37 (Figure 2) and forming, with the latter peripheral wall, the guiding edges 36c.

From the annular chamber 37, four passages 38 of the next stage of turbulence lead inwards into the nozzle into a second inner annular chamber 39 which surrounds a peglike deviating projection 40 which protrudes from the plane determined by the bottom surfaces 36d (Fig. 3) of the ending ducts 36 up to almost the entry into the outlet orifice 41.

As can be seen from Fig. 3 the annular chambers and tangential ducts are covered hermetically, or at least 1iquid-tightly, by the bottom surface 33b of the recess 33a. A pressurized liquid flowing through the hollow nozzle interior can thus only move through the ducts and annular chambers towards outlet orifice 41.

The most ideal conicity of the tangential ducts 36 is achieved if a tangent is drawn from the channel side 35A -12to the periphery of the annular chamber 37 and a straight line is drawn from the channel side 35B through the point of contact 37A of this tangent with the annular chamber 37. Advantageously, the width of the annular chamber 37 is then selected in such a way that it is equal to the width of the mouths 36b of the tangential ducts 36 in the annular chamber 37. This configuration enables the liquid under pressure arriving from the axial ducts 35 to be accelerated by the narrowing of the tangential ducts 36 to the mouths of the latter in annular chamber 37, and to impart a component of centrifugal force to the liquid by the rotational movement to which the liquid is subject in annular chamber 37. Furthermore, a suction effect is produced in the annular chamber 37 at each mouth 36b of a tangential duct 36. The optimal location for edge 38d of the inlet orifices 38a of the inner tangential ducts 38 of a secondary stage is obtained by drawing from the first contact point of edge 36c between the straight line 35B20 37A with the annular chamber wall 37a a tangent to the periphery of the second annular chamber 39, and the optimal width of the inlet orifices 38a of the inner tangential ducts 38 is obtained by drawing a straight line from the point 39A where the last-mentioned tangent touches the second annular chamber 39 to a point 35A of the lateral edge 35a of supply channel or axial duct 35. -13Advantageously, the width of the annular chamber 39 is so chosen that it is identical with the sum of the mouths of the inner tangential ducts 38 in that annular chamber, whereby the diameter of the peg-like projection 40 is also determined. The height of outer tangential ducts 36 in axial direction remains unchanged, while on the contrary the inner ducts 38 become narrower beginning from their inlet orifices 38a between the two axial wall edges 38c and 38d not only with regard to their width but also with regard to their height (in axial direction) up to their mouths 38b in annular chamber 39.

This narrowing is not continuous, but interrupted by a step 23 constituting an obstacle generating mechanical break-up and turbulence already during acceleration (Figures 2 and 3). The peripheral edge about the frontal face preferably containing a depression 40a of projection 40 (Fig. 5) also leads to turbulence in the liquid flowing through the inner ducts 38. An additional turbulence is caused by an annular bead 42 located on the inside of the nozzle case 33 around the nozzle outlet 41 (Figure 4).

In the atomizing nozzle according to the invention, a pressurized liquid is accelerated, set in rotation and swirled in a controlled manner, which leads to an optimum utilization of the available ejection force. The volume -14of the main supply conduit 27 is substantially larger as compared with the channels or axial ducts and tangential ducts which have been mentioned and are connected thereto. This volume of the main supply channel 27, oversized as compared with the subsequent channels and ducts, is on the one hand necessary so that the available pressure force, to which the liquid is subjected, is brought into action up to the axial ducts 35 without restriction, and on the other hand, so that the axial and tangential ducts remain free even in the case of a liquid which dries easily, as a result of slowed-down evaporation of a relatively large quantity of liquid stored in the main supply conduit 27.

The spray output of the atomizing nozzle according to the invention can be adapted to the particular viscosity of the liquid by correspondingly altering the cross-section of the axial ducts 35 and also the cross-sections of the spaces 36, 37, 38 and 39 of the hollow interior. A higher viscosity of the liquid demands of course a larger 2C cross-section than a low viscosity.

The size of droplets in the spray can be adjusted by altering the distance between the peg-like projection 40 and the annular rib 42 of the nozzle case 33, the smaller the distance, the smaller is the size of the drops. Of -15course, the distance must not be kept too small, which reduces the ejection velocity and also enlarges the ejection angle of the spray mist, unless these effects were desired for a certain product. The ejection angle of the spray mist also depends on the length of the nozzle outlet 41 of the nozzle case 33. The longer the outlet 41, the smaller is this angle.

Figures 4 and 5 show a further advantageous embodiment of the atomizing nozzle according to the invention, The nozzle core 32 resembles that shown in Figures 1 to 3, except that, instead of the second annular chamber 39, it has a turbulence chamber 45 which is formed as the result of the projection 40 carrying an axially protruding annular flange 44 around its front face. The depression 40a formed inside the flange on the front face of the projection 40 is the upper inner limit of the turbulence chamber 45, whilst the bottom surface 33b of the recess 33a in the nozzle case 33 delimits this chamber on the outside, the annular bead 42, the outer diameter of which is somewhat smaller than the inner diameter of the annular flange 44, protruding slightly into the turbulence chamber 45. Thus, an annular gap 46 remains between the annular flange 44 and the collarlike annular rib 42, which gap effects a considerable increase of turbulence in the turbulence chamber 45, particularly if the upper rim of the 48i®9 -16annular rib 42 protrudes up to the plane of the upper rim of the annular flange 44 or beyond this plane into the interior of the outlet chamber 45 (Figure 5).

In the embodiment according to Figure 4, the nozzle case 5 33 is provided, on its inner rim surrounding the recess 33a, with an annular flange or crimp 28 which engages so firmly with a corresponding recess 28a of the actuating head 30 that it cannot be expelled from the actuating head 30 even by a liquid which is under a strong pressure.

Figure 6 shows a further embodiment of the nozzle core 32 having six axial supply channels 35 which lead to six tangential ducts 36 and end in a common annular chamber 37 from where six inner tangential ducts 38 lead to the common second annular chamber 39 which is delimited by the peg-like deviating projection 40.

Figure 7 shows a further embodiment in which the atomizing nozzle according to the invention can be provided not only with two, but also with three or more successive stages of turbulence, that is to say, additionally to the ducts and annular chambers 36, 37, 38 and 39, the nozzle core 32 can also contain the tangential ducts 48 and the annular chamber 49 of a tertiary stage of turbulence and can be provided with an outlet chamber 45 above the projection 40 -1748169 Of course, the number of successive turbulence stages also depends on the available pressure of the liquid so that the liquid flow is not unduly braked by excessive friction. The higher the pressure to which the liquid is subject, the more turbulence stages can be provided.

In this embodiment according to Figure 7 , the height of the feed channels and ducts does not decrease conically but stepwise towards the outlet chamber 45, in this case, each step forms an obstacle resulting in vortices and the achieved narrowing of the ducts is a factor accelerating the liquid stream (Figure 8).

Figure 9 shows yet a further embodiment of the nozzle core 32, in which the latter, additionally to the tangential ducts 36 and 38, also has inlet channels 29, the entry orifices 29a of which are not offset on the periphery of the nozzle core 32 but towards the center thereof and which are supplied via passages 26 extending axially from the front face 33c of the nozzle case 33 through the nozzle core. The inlet channels 29 are arranged in such a way that they open out into the annular chamber 37 tangentially to the outer side wall thereof at points, which generate suction, between the mouths 36b of every two adjacent tangential ducts 36. -18In order to generate an additional suction effect in the inlet channels 29, the outer wall of the annular chamber 37 is not absolutely circular but tapers in each case just before (as viewed in the direction of flow) the mouths 29b of the inlet channels 29. The liquid, which flows in from a tangential duct 36 and has already been accelerated, is then driven into the subsequent narrowing of the annular chamber 37 where it is accelerated once again so that it effects suction when it flows past the mouth 29b of an inlet channel 29, and this effect is enhanced since this mouth 29b is located slightly behind (that is to say upstream of) the inlet point 38a of a tangential duct 38, through which the liquid flows to the outlet orifice 41. The inlet channels 29 are provided in order to suck in a second medium, such as, for example, air, and to mix it with the liquid flowing through the nozzle interior.

Since the atomizing nozzle according to the invention is intended to be preferably used for dispensing a product 2C which is free from gas and in particular also from a propellant gas, it is necessary, if a foam-forming product, for example, shaving cream, is to be dispensed as a foam and if this requires the presence of a gaseous medium to form the foam, also to introduce a gas phase in addition -1948169 to the base liquid of the shaving cream. This can be effected if the base liquid, while flowing through the outer tangential ducts 36, the annular chamber 37 and the inner tangential ducts 38, can suck in air through the orifices 29a of the inlet channels 29, which air then forms the shaving foam, when mixed with the liquid (Figures 9 to 12).

Since, in a gas-free alternative for aerosol cans, oil can also be filled in additionally to foam-forming emulsions, which, however, likewise require a gas medium in order to emerge as a dust cloud or spray mist from an atomizing nozzle, it is possible to suck in this gas medium (air) via the inlet channels 29 by means of the atomizing nozzle according to the invention. The crosssection of the inlet channels 29 depends on the desired quantity of air, which is required for mixing, and this must thus be adapted from case to case. Figures 11 and 12 show an atomizing nozzle which has a nozzle case 33 and a nozzle core 32 inserted therein and tn which the four orifices 29a, through which a second medium can be sucked in via the inlet channels 29, are connected to one another via passages 26a and an annular channel 26b (shown in dashes in Figure 11) which runs in the nozzle case 33 and is connected to an inlet valve 22 by means of which the quantity of the second medium sucked in can be -20, 481S9 controlled. In addition to a gas medium, such an embodiment can also suck in other fluid media, such as liquids or fine powders, which is described in more detail in the following text.

Figure 13 shows a longitudinal section through an actuating head with another advantageous embodiment of the atomizing nozzle according to the invention. In this case, the various channels, ducts and annular chambers are moulded on, or eroded in, an inner nozzle body 52 on the front face 52a and peripheral wall 52b thereof and are covered by a nozzle case according to Figure 4. The nozzle body 52 is preferably molded integrally with the actuating head 50 and protrudes from the bottom 51b of the recess 51a in the side wall 51 for such a distance that sufficient clearance remains above and around it for a firm, tight insertion of the nozzle case 53 into the side wall 51 of the actuating head 50. Such an embodiment is only possible if the diameter of the nozzle body 52 permits the provision of the four supply ducts (axial ducts) 35 by injection-molding techniques, that is to say, if the diameter is too large, the supply ducts 35 become too long. Since these must have a very small cross-section, namely between 0.3 and 0.6 mm depending on the viscosity of the product, they must be kept as short as possible.

Experience shows that the most advantageous upper limit of -21the total diameter of the nozzle body 52 is about 16 mm in this embodiment. If the diameter must be larger for any reason, it is advisable to choose the embodiment according to Figure 1, The main supply duct 54 has a shortened duct part 56 on the inner end wall 52c of the nozzle body 52 and a remaining narrowed duct part 57 leading further into the actuating head 50. Moreover, the angle 6, formed by the blind end 57a of the narrowed duct part 57 with the central axis of the nozzle, is larger than the corresponding angle a, formed by the blind end 56a of the shortened duct part 56. These angled-off blind ends 56a and 57a serve as baffle surfaces or damming-up surfaces for liquid which flows in the main supply duct 54 and which is impelled by means of these baffle surfaces under a more or less high pressure into the axial supply ducts 35^ and 352· If the main supply duct 54 were of cylindrical shape, a back-pressure would be formed at the blind end thereof, which back-pressure would impel the liquid under a higher pressure via the upper supply ducts 35^ than via the lower supply ducts 35g. According to the invention, this is avoided since the impingement surface 56a protrudes in the region of the main supply duct 54, above the lower channels 35g, and the surface and angle of inclination of the impingement surface are selected so that the back-pressure generated there in the ducts 352 lying below is identical -224 816 9 to that in the upper ducts 35^. If the four ducts 35^ and 352 have a non-uniform delivery of pressure, the spray mist becomes unsymmetrical. From the four ducts 35^, 35g only two lying in the cross-sectional plane are shown.

The new nozzle eliminates the use of a pump which not only requires repeated pressure for expelling the product but which also pumps surrounding air and thus oxygen into the product container, which naturally results in an undesired oxidation of the product.

In order to show the outstanding scope of the atomizing nozzle according to the invention in the best light, it may be mentioned that laboratory experiments have demonstrated that it is possible to save up to 75% of propellant gas in aerosol cans with the aid of this nozzle. In summary it should be stated: (a) The atomizing nozzle according to the invention is capable of spraying a liquid, which is merely under a mechanical pressure, under only about 2 atmospheres gauge in the same quality as is attained by commercially available 20 atomizing nozzles only under a pressure of 6 atmospheres gauge. (b) In the case of aerosol spray cans, this means that the propellant gas no longer needs to serve as both the expulsion energy and the spraying factor as the result of -2348169 its letdown in the surrounding air, but is now only intended to provide the pressure which is just sufficiently high to utilize the mechanical break-up properties of the atomizing nozzle according to the invention. (c) This in turn has the consequence that it is, no longer necessary to use a propellant gas mixture, such as Freon 11 and Freon 12, which was hitherto required to generate, on the one hand, a sufficiently large quantity of gas which serves as the spraying factor, and, on the other hand, to vary the expulsion pressure by means of different quantities of one or the other component of the gas mixture because of their very different boiling points, but instead, when the atomizing nozzle according to the invention is used, merely the propellant gas with the lowest boiling point may be employed and only such a quantity thereof may be used that an excess pressure of about 2 atmospheres gauge is reached in the aerosol can. (d) Experience has shown that, for example in the case of hair lacquer, merely 19% of Freon 12, corresponding to a pressure of 1.7 atmospheres gauge, must be filled into the aerosol can, when the atomizing nozzle according to the invention is used, instead of 77% of the gas mixture of Freon 11 and 12, corresponding to a pressure of 3.8 atmospheres gauge, in order to reach identical spray qualities. The atomizing nozzle according to the invention also works with a pressure of 1.7 atmospheres gauge or even, depending on the drop size demanded, down to 0.8 -24atmosphere gauge, provided that this pressure is generated by a propellant gas. This is so because the propellant gas, after it has played its part as the source of expulsion energy, is let down, even though to a smaller extent, in contact with the surrounding air and thus compensates, as the spraying factor, the pressure fraction which makes up the difference to the 2 atmospheres gauge mentioned further above.

Laboratory experiments have also shown that, due to the 10 mechanical break-up properties of the atomizing nozzle according to the invention, liquids which are forced through the nozzle under a high pressure, can be caused to evaporate due to the frictional heat being generated.

Claims (5)

1. An atomizing nozzle for dispensing a liquid, which is subject to an elevated pressure, in the form of a spray, comprising at least two parts which frontally adjoin each other radially to an axis of an outlet orifice present in one of the parts, between the parts being arranged an axially symmetrical flowing path system which centrically has an outlet chamber with several ducts ending therein in the main tangentially from a surrounding annular chamber, in the ducts further ducts ending essentially rightangled in the former from an outward and axial direction are provided, through which the pressurized liquid is led from the exterior to the flowing path system wherein there is provided a peg-like deviating projection situated centrically in the outlet chamber opposite to the outlet orifice protruding near to the outlet orifice and/or there is arranged in at least one of the tangential ducts a deviating projection.

2. An atomizing nozzle according to Claim 1, in which the part with the outlet orifice is designed as a pot-shaped case into which the other part is inserted as a plug.

3. An atomizing nozzle according to any one of the preceding claims, in which for the supply of the tangential -26. 48169 ducts leading to the said annular chamber there is provided a further surrounding annular chamber which in turn is supplied by ducts ending therein from an outward and in the main tangential direction. 5

4. An atomizing nozzle according to Claim 1 or 3, in which in each case a duct leading tangentially to an annular chamber ends in the flowing direction of the annular chamber just a short distance upstream of the inlet orifice in a duct leading out of that same annular 10 chamber. 5. An atomizing nozzle according to any one of the preceding claims, in which the tangential ducts decrease in their cross-sections along the flowing direction at least in their end zones. 15 6. An atomizing nozzle according to Claim 5, in which the cross-section of the tangential ducts decrease continuously from their inlet orifice to their end zone. 7. An atomizing nozzle according to Claim 1 or 3, in which the cross-sections of the annular chambers decrease in 20 each case from an outer annular chamber to an inner annular chamber. -2748168 8. An atomizing nozzle according to any one of the preceding claims, in which the outlet cross-section of each tangential duct is at its point of opening into the annular chamber a third of the latter's cross-section at 5 the most. 9. An atomizing nozzle according to any of claims 2 to 8. in which the tangential ducts, the annular chambers and the outlet chamber are designed as depressions which are recessed in the front face of the 10 plug. 10. An .atomizing nozzle according to Claim 9, in which the deviating projections are designed as steps in the bottom of the depressions. 11. An atomizing nozzle according to Claim 10, in which 15 each duct provided with a step has a larger cross-section in front of that step than after that step. 12. Anatomizing nozzle according to any one of the Claims 1 to 10, in which the deviating projections are situated in the area of the inlet orifice and/or the opening of a 20 tangential duct into or out of an annular chamber respectively. -2848169 13. An atomizing nozzle according to any one of the preceding claims, in which there extends a collar-like annular rib surrounding the outlet orifice and reaching up to the outlet chamber. 5 14. Anatomizing nozzle according to any one of the preceding claims, in which the axial distance from the front face of the peg-like projection to the opening of the outlet orifice is 0.1 mm at the most. 15. Anatomizing nozzle according to any one of the Claims 10 1 to 14, in which the peg-like projection has a central depression. ft 16. Anatomizing nozzle according to Claim 15, in which the axial distance from the front face of the peg-like projection to the front face of the annular rib is 0.05 mm 15 at the most. 17. Anatomizing nozzle according to any one of the preceding claims, in which there are provided inlets for a second medium, each of which leads from the exterior in the main tangentially to the most outwardly situated 20 annular chamber. -2948169 18. An atomizing nozzle according to Claim 17, in which the annular chamber narrows in the flowing direction of the same before the opening of each inlet in such a way that the opening is situated in the suction area having

5. Been caused by the narrowing.