Dispensing device for spraying a sprayable medium

Abstract

The invention relates to a dispensing device (11) for spraying a sprayable medium, in particular a fluid or powder, which device is designed as a handheld apparatus, in which a compressed air device (86) is provided, comprising a spray head (14) that is connected to the housing (12) and is intended for dispensing the medium, comprising a fluid line (44) leading from the storage container (41) to the spray head (14) and comprising a supply line (36) leading from the compressed air device (86) to the spray head (14), and comprising a first nozzle (38) that is connected to the supply line (36) and, separately therefrom, comprising a second nozzle (46) that is connected to the fluid line (44) and that protrudes into an airflow emerging from the first nozzle (38), such that an atomizing zone (49) is formed outside of the spray head (14), wherein, in a plan view of the outlet opening (83) of the first nozzle (38), the second nozzle (46) covers at least 1% of an internal cross section of the first nozzle (38).

Claims

1. A dispensing device for spraying a sprayable medium, in which the device is designed as a handheld apparatus, comprising a housing, in which a compressed air device is provided, a spray head that is connected to the housing and is intended for dispensing the medium, a receiving chamber that is arranged in the housing and is intended for a storage container in which the medium to be dispensed is stored, a fluid line that leads out of the storage container to the spray head, and a supply line that leads from the compressed air device to the spray head, wherein the spray head comprises a first nozzle that is connected to the supply line and, separately therefrom, a second nozzle that is connected to the fluid line, wherein the second nozzle is arranged at an angle of incidence (α) of 90° or less than 90° to the central axis of the first nozzle, in the dispensing direction, and protrudes into an airflow emerging from the first nozzle, such that a spray jet including an atomizing zone is formed outside the spray head, wherein the first nozzle is formed as a hole in the spray head and the second nozzle is formed as a hole or as an inserted tube portion in the spray head, wherein a front face of the first nozzle is located in a first end face of the spray head and a front face of the second nozzle is located in a second end face of the spray head or protrudes on the spray head, relative to the second end face, wherein a leading edge and a trailing edge, opposite the leading edge, is provided on a front face of the second nozzle, wherein the leading edge of the second nozzle is associated with the first nozzle and the front face of the second nozzle is arranged at an angle of incident flow (β) of more than 0° relative to the central axis of the first nozzle, such that the outlet opening of the second nozzle is oriented so as to face away from the outlet opening of the first nozzle, wherein at least an inside diameter of the second nozzle is smaller than an inside diameter of the first nozzle or an outside diameter of the second nozzle is smaller than an outside diameter of the first nozzle, and wherein the front face of the first nozzle protrudes relative to the first end face and is oriented so as to be at an angle of inclination of less than 90° relative to the central axis of the first nozzle, and a stall edge that is set back and a stall edge that protrudes, relative to the central axis of the first nozzle, is formed in the dispensing direction, wherein the protruding stall edge of the leading edge is associated with the second nozzle.

2. The dispensing device according to claim 1, wherein, in a plan view of an outlet opening of the first nozzle, the second nozzle covers at least 1% of an internal cross section of the first nozzle, and in a plan view of the outlet opening of the first nozzle the second nozzle preferably covers at least 30% of the internal cross section of the outlet opening of the first nozzle.

3. The dispensing device according to claim 1, wherein the atomizing zone is formed outside an end face of the spray head that comprises the first nozzle, and outside a second end face of the spray head that comprises the second nozzle, and are preferably arranged so as to be at right-angles or at an angle of more than 90° relative to one another, or the second end face has a trough-like course as far as the second nozzle.

4. The dispensing device according to claim 1, wherein the leading edge of the second nozzle is tangentially associated with the outlet opening of the first nozzle.

5. The dispensing device according to claim 1, wherein, in a plan view of the outlet opening of the first nozzle, the front face of the second nozzle is inclined relative to a plane that extends horizontally through the central axis of the first nozzle.

6. The dispensing device according to claim 5, wherein a side edge of the second nozzle, seen in a plan view of the outlet opening of the first nozzle is arranged above the plane that extends horizontally through the central axis of the first nozzle, and a side edge opposite the side edge is arranged below said plane, or the side edges of the second nozzle, seen in a plan view of the outlet opening of the first nozzle, are arranged over the plane that extends horizontally through the central axis of the first nozzle.

7. The dispensing device according to claim 1, wherein the central axis of the second nozzle is arranged so as to be offset with respect to a vertical plane extending through the central axis of the first nozzle, and the central axis of the second nozzle is arranged between the vertical plane extending through the central axis of the first nozzle and a vertical plane that is tangential to the inner wall of the first nozzle.

8. The dispensing device according to claim 1, wherein the central axis of the second nozzle is arranged so as to be askew relative to the central axis of the first nozzle.

9. The dispensing device according to claim 1, wherein the trailing edge of the second nozzle is sharp-edged.

10. The dispensing device according to claim 1, wherein the spray head is a unitary part including the first nozzle and the second nozzle.

11. The dispensing device according to claim 1, wherein a connection for the fluid line and the compressed air line is formed on the spray head.

12. The dispensing device according to claim 10, wherein the spray head is an injection molded part.

13. A dispensing device for spraying a sprayable medium, in which the device is designed as a handheld apparatus, comprising a housing, in which a compressed air device is provided, a spray head that is connected to the housing and is intended for dispensing the medium, a receiving chamber that is arranged in the housing and is intended for a storage container in which the medium to be dispensed is stored, a fluid line that leads out of the storage container to the spray head, and a supply line that leads from the compressed air device to the spray head, wherein the spray head comprises a first nozzle that is connected to the supply line and, separately therefrom, a second nozzle that is connected to the fluid line, wherein the second nozzle is arranged at an angle of incidence (α) of 90° or less than 90° to the central axis of the first nozzle, in the dispensing direction, and protrudes into an airflow emerging from the first nozzle, such that a spray jet including an atomizing zone is formed outside the spray head, wherein the first nozzle is formed as a hole in the spray head and the second nozzle is formed as a hole or as an inserted tube portion in the spray head, wherein a front face of the first nozzle is located in a first end face of the spray head and a front face of the second nozzle is located in a second end face of the spray head or protrudes on the spray head, relative to the second end face, wherein a leading edge and a trailing edge, opposite the leading edge, is provided on a front face of the second nozzle, wherein the leading edge of the second nozzle is associated with the first nozzle and the front face of the second nozzle is arranged at an angle of incident flow (β) of more than 0° relative to the central axis of the first nozzle, such that the outlet opening of the second nozzle is oriented so as to face away from the outlet opening of the first nozzle, wherein at least an inside diameter of the second nozzle is smaller than an inside diameter of the first nozzle or an outside diameter of the second nozzle is smaller than an outside diameter of the first nozzle, and wherein the front face of the first nozzle protrudes relative to the first end face and comprises a cannula-like bevel, and a stall edge that protrudes relative to the outlet opening is formed in the dispensing direction, which edge is associated with the second nozzle.

14. A dispensing device for spraying a sprayable medium, in which the device is designed as a handheld apparatus, comprising a housing, in which a compressed air device is provided, a spray head that is connected to the housing and is intended for dispensing the medium, a receiving chamber that is arranged in the housing and is intended for a storage container in which the medium to be dispensed is stored, a fluid line that leads out of the storage container to the spray head, and a supply line that leads from the compressed air device to the spray head, wherein the spray head comprises a first nozzle that is connected to the supply line and, separately therefrom, a second nozzle that is connected to the fluid line, wherein the second nozzle is arranged at an angle of incidence (α) of 90° or less than 90° to the central axis of the first nozzle, in the dispensing direction, and protrudes into an airflow emerging from the first nozzle, such that a spray jet including an atomizing zone is formed outside the spray head, wherein the first nozzle is formed as a hole in the spray head and the second nozzle is formed as a hole or as an inserted tube portion in the spray head, wherein a front face of the first nozzle is located in a first end face of the spray head and a front face of the second nozzle is located in a second end face of the spray head or protrudes on the spray head, relative to the second end face, wherein a leading edge and a trailing edge, opposite the leading edge, is provided on a front face of the second nozzle, wherein the leading edge of the second nozzle is associated with the first nozzle and the front face of the second nozzle is arranged at an angle of incident flow (β) of more than 0° relative to the central axis of the first nozzle, such that the outlet opening of the second nozzle is oriented so as to face away from the outlet opening of the first nozzle, wherein at least an inside diameter of the second nozzle is smaller than an inside diameter of the first nozzle or an outside diameter of the second nozzle is smaller than an outside diameter of the first nozzle, wherein, in a plan view of the outlet opening of the first nozzle, the front face of the second nozzle is inclined relative to a plane that extends horizontally through the central axis of the first nozzle, and wherein a side edge of the second nozzle, seen in a plan view of the outlet opening of the first nozzle is arranged above the plane that extends horizontally through the central axis of the first nozzle, and a side edge opposite the side edge is arranged below said plane.

Description

(1) The invention and further advantageous embodiments and developments thereof are described and explained in greater detail in the following, with reference to the examples shown in the drawings. The features found in the description and in the drawings can be applied, according to the invention, individually or together, in any desired combination. In the figures:

(2) FIG. 1: is a perspective view of a dispensing device,

(3) FIG. 2: is a schematic detail of the dispensing device according to FIG. 1,

(4) FIG. 3: is a schematic cross section of the dispensing device according to FIG. 1,

(5) FIG. 4: is a schematic detail of two nozzles on a spray head of the dispensing device according to FIG. 1,

(6) FIG. 5: is a schematic detail of an alternative embodiment of the spray head according to FIG. 4,

(7) FIG. 6: is a schematic detail of an alternative arrangement of the nozzles on the spray head of the dispensing device according to FIG. 4,

(8) FIG. 7: is a schematic detail of an alternative embodiment to that of FIG. 4,

(9) FIG. 8: is a further schematic detail of an alternative embodiment of the spray head to that of FIG. 4,

(10) FIG. 9: is a schematic detail of a further alternative embodiment of the spray head to that of FIG. 4,

(11) FIG. 10: is a further schematic detail of an alternative arrangement of the nozzles on the spray head of the dispensing device according to FIG. 4,

(12) FIG. 11: is a further schematic detail of an alternative arrangement of the nozzles on the spray head of the dispensing device according to FIG. 4,

(13) FIG. 12: is a further schematic detail of an alternative arrangement of the nozzles on the spray head of the dispensing device according to FIG. 4,

(14) FIG. 13: is a further schematic detail of an alternative arrangement of the nozzles on the spray head of the dispensing device according to FIG. 4,

(15) FIG. 14: is a further schematic detail of an alternative arrangement of the nozzles on the spray head of the dispensing device according to FIG. 4,

(16) FIG. 15: is a further schematic detail of an alternative arrangement of the nozzles on the spray head of the dispensing device according to FIG. 4,

(17) FIG. 16 is a plan view of the outlet opening of the first nozzle of the spray head, showing a detail of the spray head, and

(18) FIG. 17 is a detail according to FIG. 8 of an alternative embodiment of the spray head.

(19) FIG. 1 is a perspective view of a dispensing device 11 for spraying a sprayable fluid or powder. In addition, FIG. 2 shows the dispensing device 11 according to FIG. 1 comprising a housing 12, which is shown only in part, and FIG. 3 is a schematic cross section of the dispensing device 11 according to FIG. 1. The following embodiments are quasi based on FIGS. 1 to 3.

(20) The dispensing device 11 is in particular designed as a handheld apparatus for dispensing a fluid or powdery medium, for example make-up, hairspray or the like. Said dispensing device 11 comprises a housing 12 and a spray head 14 that is arranged on the housing 12. As a result, at least one storage container 41 that can be inserted into the housing 12 can be replaced in a simplified manner. It may alternatively also be possible for a housing portion of the housing 12 to be removable, allowing only for access for inserting the storage container 41 and/or a fastener 42 and/or a spray head 14, such that all further components remain closed by the housing 12.

(21) Preferably, a storage container 41 comprising a spray head 14 arranged thereon and a connector 81 is inserted as a unit into the housing 12. The housing 12 can comprise a receptacle into which the storage container 41 can be inserted by means of being clipped in. The storage container 41 can be received therein in a secure manner. The storage container 41 together with the spray head 14 can be removed from the housing 12 by means of at least one detachment element or one detachment button. Changing the storage container 41 together with the spray head 14 means that it is also not necessary to clean the spray head 14 when the medium to be applied is changed.

(22) A compressed air device 86 is provided in the housing 12, by means of which device an airflow is generated and supplied to the spray head 14 by means of a supply line 36. Said compressed air device 86 operates using ambient air. An additional propellant gas, in the case of conventional spray cans, is not required. In particular, this supplies a first nozzle 38 on the spray head 14 with the airflow. The compressed air device 86 can for example comprise an electrical drive motor 18. Said motor is supplied for example by means of an accumulator 19 provided in the housing 12. Said accumulator can be provided in the housing 12 so as to be replaceable. Alternatively, wireless or wired charging of the accumulator 19 may be provided. The drive motor 18 can be contacted by means of a controller (not shown in greater detail). The drive motor 18 can be activated by means of a control knob on the housing 12, as a result of which an air pump 22 is driven, generating the airflow. The air pump 22 is supplied with air for example via inlet openings in the housing wall of the housing 12. In this case, one or more air inlet openings can preferably be provided with a filter in the housing wall. The airflow is supplied to the first nozzle 38 on the spray head 14 via the supply line 36. A connection 81 is provided between the supply line 36 and the spray head 14. Said connection 81 is preferably designed as a plug-in connection. Plugging or placing a connector on the spray head 14 in or on the connection 81 can establish a media-tight connection between the spray head 14 and the supply line 36. Said connection may be detachable, such that the spray head 14 can be designed so as to be replaceable. Instead of the supply line 36, a connection piece can also be provided, which piece can be arranged such that it can be pushed onto the spray head 14 and/or onto the air pump 22. An air pressure regulation means can be attached to the connection piece. Said means can be designed for example as a regulation opening, as a slide, as an adjusting wheel, or the like. In particular, a regulation means of this kind can be provided in the case of the integral spray head 14 in the form of an injection molded part.

(23) According to FIG. 3, the storage container 41 and the closure 42 are preferably designed so as to be integral with the spray head 14. The spray head 14 can also be detachably fastened to the closure 42 and/or the storage container 41. In this case, the closure 42 can be connected to the spray head 14 by means of a flange, latching, clipped, plug-in or screw connection. The spray head 14 and the storage container 41 are preferably integral, so as to form a sales unit which can be inserted, as a whole, into the housing 12. The storage container 41 and/or the spray head 14 can comprise a supply air opening, such that pressure compensation in the storage container 41 is guaranteed automatically during dispensing of the medium. A viewing window 79 may be provided on the housing 12 and/or the storage container 41, in order for it to be possible to read off a filling level of the storage container 41 in a simple manner.

(24) The spray head 14 comprises the first nozzle 38 which has an outlet direction for the airflow, according to the arrow 65 in FIG. 3. A second nozzle 46 is arranged at an angle of preferably less than 90°, in particular 89° to 80°. The fluid or powder stored in the storage container 41 is dispensed via said second nozzle 46. This arrangement and orientation of the two nozzles 38, 46 relative to one another forms an atomizing zone 49 outside of the spray head 14.

(25) In order to dispensing the fluid or powder from the storage container 41, the airflow dispensed from the first nozzle 38 flows around the second nozzle 46. In particular, the airflow flows around the second nozzle 46 in the region of an outlet opening 84 of the nozzle 46, such that a generated Bernoulli effect generates a negative pressure at the outlet opening 84 of the nozzle 46. As a result of said negative pressure, the fluid or powder is conveyed out of the storage container 41 and supplied to the atomizing zone 49 via the second nozzle 46.

(26) The outlet opening 84 of the second nozzle 46 protrudes into the airflow emerging from the first nozzle 38. As a result, the airflow can flow around the nozzle 46 in the dispensing direction 65. The first nozzle 38 can protrude relative to a first end face 91 of the spray head 14, as is shown in FIG. 5. Likewise, the first nozzle 38 can be provided so as to be flush to the end face 91 of the spray head 14, as is shown in FIG. 4. The outlet opening 84 of the second nozzle 46 protrudes on the spray head 14, relative to an end face 89 that defines the atomizing zone 49. Said end face 89 can be provided so as to slope away, proceeding from the second nozzle 46, such that the spray head 14 opens opposite the atomizing zone 49.

(27) The fluid line 44 can comprise a tapering 92 proceeding from an end of the fluid line 44 located in the storage container 42 to the outlet opening 84 of the second nozzle 46. As a result, the nozzle cross section is smaller than the cross section of the fluid line 44 in the storage container 42 as far as the spray head 14. The tapering 92 can be of a length of less than 1 cm. This achieves an optimum dispensing of the medium from the storage container 41. This embodiment is furthermore advantageous in that, when the dispensing device 11 is switched off, the fluid or powder is withdrawn from the fluid line 44, in particular the nozzle 46, and returns into the upright storage container 41. As a result, drying out and clogging of the nozzle 46 can be prevented.

(28) A protective cap can be provided on the spray head 14. Said protective cap can be connected to the spray head 14 by means of a film hinge. It may also be possible for the protective cap to be placed or pushed onto the spray head 14. The protective cap can comprise one or more closure elements, wherein a closure element is provided for the nozzle 46 dispensing the fluid, and preferably simultaneously a closure element for a ventilation opening leading to the storage container 41. As a result, the medium can be prevented from flowing out of or drying in the storage container 41. Furthermore, a protective cap of this kind is used to protect against damage.

(29) FIGS. 4 to 17 show various schematically enlarged embodiments of the spray head 14, from which different positions, orientations and/or embodiments of the first nozzle 38 relative to the second nozzle 46 are evident. In this case, the outlet opening 84 of the second nozzle 46 protrudes into the airflow emerging from the first nozzle 38, in order to atomize the fluid or powder, dispensed via the second nozzle 46, in the atomizing zone 49. A nozzle arrangement of this kind makes it possible to achieve finer atomization than in the case of previous spray nozzles, such that the properties of the fluids can be changed positively.

(30) According to FIGS. 4 to 15, the second nozzle 46 is arranged at an angle of incidence α of less than 90° to the central axis 93 of the first nozzle 38, in the dispensing direction 65. In particular, an angle of incidence α of 89° to 80° is formed between the central axis 93 of the first nozzle 38 and a central axis 94 of the second nozzle 46.

(31) FIGS. 4 to 15 differ at least in that the embodiments and orientations of the front faces 87, 88 of the first and second nozzle 38, 46 differ from one another, wherein the different embodiments and orientations described in the following can be combined with one another as desired.

(32) In the embodiment of the spray head 14 according to FIG. 4, a front face 87 of the first nozzle 38 is oriented so as to be orthogonal to the central axis 93 of the first nozzle 38, and a front face 88 of the second nozzle 46 is oriented so as to be in parallel with the central axis 93 of the first nozzle 38. A spray jet 51 is shown by way of example. The front face 87 of the first nozzle 38 is preferably located in an end face 91 of the spray head 14. The front face 88 of the second nozzle 46 preferably protrudes relative to an end face 89 of the spray head 14. The first end face 91 and the second end face 89 adjoin one another or transition into one another. The second end face 89 extends from the first end face 91 as far as the second nozzle 46. These are preferably arranged at an angle of 90°. A third end face 90 adjoins the second end face 89. Said faces can be located in the plane of the second end face 89 or can be inclined relative thereto, such that the open and outside atomizing zone 49 is formed. Said end faces 91, 89, 90 form a boundary between the housing 12 and the atomizing zone 49. Arranging the front face 87 of the first nozzle 38 in the end face 91 forms what is known as a wall nozzle. The second nozzle 46 protrudes relative to the second end face 89. The second end face 89 can be formed by a sloping surface that is oriented so as to be at an angle of more than 90° relative to the first end face 91 and transitions into the third end face 90. The second nozzle 46 comprises a leading edge 96 which is associated with the outlet opening 83 of the first nozzle 38. In this case, the second nozzle 46 is arranged in front of the outlet opening 83 of the first nozzle 38 in the outflow direction 65, such that, in a plan view of the outlet opening 83 of the first nozzle 38, at least 1% of a cross section of the outlet opening 83 of the first nozzle 38 is covered. Preferably, coverage of at least 30% can be provided. In particular, the front face 88 of the second nozzle 46 can be located between the axis 98 and the central axis 93, or above the central axis 93. This results in partial coverage of the airflow dispensed by the first nozzle 38, such that the airflow flows completely around the second nozzle 46, in particular an end portion of the second nozzle 46. It is in particular possible for a region of between 30% and 90% of the internal cross section of the outlet opening 83 of the first nozzle 38 to be covered, in a plan view of the outlet opening 83 of the first nozzle 38.

(33) It may be possible for the leading edge 96 of the second nozzle 46 to be directly associated with the outlet opening 83 of the first nozzle 38, for example for the leading edge 96 to contact the front face 87 of the first nozzle 38 in a tangential manner. (This is shown by way of example in FIG. 6). The airflow emerging from the first nozzle 38 strikes the leading edge 96, such that a flow around the outlet opening 84 of the second nozzle 46 is formed, and the negative pressure is generated at the outlet opening 84 of the second nozzle 46 as a result of the Bernoulli effect.

(34) The trailing edge 99 is preferably sharp-edged. This is in particular provided in all the embodiments.

(35) FIG. 5 shows an alternative arrangement of the first and second nozzle 38, 46 in the atomizing zone 39. The embodiment according to FIG. 5 differs from the embodiment according to FIG. 4 in that the front face 87 of the first nozzle 38 protrudes on the spray head 14, relative to the first end face 91. Otherwise, the embodiment corresponds to the embodiment according to FIG. 4.

(36) FIG. 6 differs from FIG. 4 or FIG. 5 in that the front face 88 of the second nozzle 46 is oriented so as to be inclined relative to the central axis 93 of the first nozzle 38. As a result of the inclination of the front face 88, the orientation of the outlet opening 84 of the second nozzle 46 faces in an opposing direction with respect to the outlet opening 83 of the first nozzle 38. For this purpose, the leading edge 96 is associated with the first nozzle 38, and a trailing edge 99 opposite the leading edge 96 is arranged towards a side remote from the first nozzle 38, in the dispensing direction 65. In this case, an angle of inclination β of more than 0° is formed between the front face 88 of the second nozzle 46 and the central axis 93 of the first nozzle 38. In particular, an angle of inclination of more than 1° is formed between the central axis 93 and the front face 88.

(37) FIG. 7 shows a further alternative embodiment of the spray head 14 to that of FIG. 4. According to this embodiment, the first nozzle 38 is formed as a hole in the spray head 14. In FIG. 4, the nozzle 38 is formed as an inserted tube portion. In the embodiment according to FIG. 7, this can make it possible to simplify the manufacture. For example, the second nozzle 46 is inserted into the spray head 14 as a tube portion. With respect to a longitudinal axis 94, said tube portion in the nozzle 46 can be oriented so as to be at an angle of 90° the longitudinal axis 93 of the first nozzle 38. The second nozzle 46 can also be inclined, as is shown for example in FIGS. 5 and 6. It is also possible for the second end face 89 to be oriented so as to be inclined relative to the first end face 91. The second end face and the third end face 89, 90 can also be located in a plane.

(38) FIG. 8 shows a further alternative embodiment to that of FIG. 7. According to this embodiment, the first nozzle 38 is formed as a hole in the spray head 14. Furthermore, the second nozzle 46 is also formed as a hole in the spray head 14. With respect to the longitudinal axis 94, said second nozzle 46 can be oriented so as to be at right-angles to the longitudinal axis 93 of the first nozzle 38. The longitudinal axis 94 of the second nozzle 46 can also be oriented so as to be at an angle of less than 90° to the longitudinal axis 93 of the first nozzle 38.

(39) It is preferably possible for a leading edge 96, which protrudes relative to the second end face 89, to be formed between the second end face 89 and the nozzle opening 84 of the second nozzle 46. The front face 88 of the second nozzle 46 can be oriented so as to be in parallel with the longitudinal axis 93 of the first nozzle 38, or can be inclined relative thereto, towards the third end face 90. In particular, the trailing edge 99 can be formed on the dispensing side in a transition region between the second nozzle 46 and the third end face 90.

(40) It is preferably possible for an inner wall 97 of the hole of the first nozzle 38 to be formed so as to be flush to the second end face 89.

(41) FIG. 9 is a schematic detail of a further alternative embodiment of the spray head 14. In this embodiment, the first and second nozzle 38, 46 are in each case provided as a hole in the spray head 14. The spray head 14 preferably consists of a plastics part, in particular an injection molded plastics part. The longitudinal axis 94 of the second nozzle 46 is preferably oriented so as to be at right-angles to the longitudinal axis 93 of the first nozzle 38. The first nozzle 38 is formed as a wall opening, i.e. the front face 87 of the first nozzle 38 is located in the end face 91. The second end face 89 is formed between the end face 87 of the first nozzle 38 and a leading edge 96 of the second nozzle 46, wherein said second end face has a trough-like course or a depression. A preferably continuous transition is provided from a lowest point of the depression as far as the leading edge 96. As a result, an additional nozzle effect or entrainment effect can be achieved. Furthermore, the outflowing medium, in particular air, from the nozzle 38 can result in a fluid or powdery medium, which is supplied to the second nozzle 46, not collecting in the corner region or in the depression of the second end face 89. In order to form the trailing edge 99, the third end face 90 is arranged so as to be inclined relative to the front face 88 of the second nozzle 46. A sharp-edged trailing edge 99 can be achieved thereby.

(42) FIGS. 10 and 11 each show an alternative embodiment of the dispensing device 11 in which, compared with the embodiment according to FIG. 5, the front face 87 of the first nozzle 38 is oriented so as to be inclined relative to the central axis 93 of the first nozzle 38. In this case, the angle of inclination γ is less than 90° to the central axis 93 of the first nozzle 38; in particular the angle of inclination is in a range of between 1° and 20°. Said inclined front face 87 forms two stall edges 101 on the first nozzle 38. One of the two stall edges 101 is set back relative to the central axis 93, in the dispensing direction 65, and the other stall edge 101 protrudes relative to the central axis 93. In this case, the protruding stall edge 101 is associated with the second nozzle 46.

(43) FIGS. 12 and 13 each show a further alternative embodiment of the dispensing device 11 in which, compared with the embodiment according to FIG. 5, the front face 87 of the first nozzle 38 comprises a cannula-like bevel 102. In a vertical longitudinal section through the nozzle 38, said cannula-like bevel provides a concave design of the front face 87. Two stall edges 101 are also formed on the first nozzle 38, by the cannula-like bevel 102, wherein one of the two stall edges 101 is set back relative to the central axis 93, in the dispensing direction 65, and the other stall edge 101 protrudes relative to the central axis 93. In this case, the protruding stall edge 101 is associated with the second nozzle 46.

(44) FIGS. 14 and 15 show an alternative embodiment of the front face 87 of the nozzle 38 of the dispensing device 11 to that of Fig. and FIG. 6. In this embodiment, the front face 87 of the first nozzle 38 comprises a V-shaped bevel 103. Likewise, the bevel 103 of the front face 87 can be U-shaped. In this embodiment, two stall edges 101 are formed which are arranged in a common plane orthogonally to the central axis 93 of the first nozzle 38.

(45) FIG. 16 is a plan view of the outlet opening 83 of the first nozzle 38, showing a detail of the spray head 14. This view makes it clear that the two nozzles 38, 46 can be oriented relative to one another such that the central axis 94 of the second nozzle 46 is arranged in a plane that extends through the central axis 93 of the first nozzle 38. In this arrangement, the second nozzle 46 is oriented centrally with respect to the first nozzle 38, such that the two central axes 93, 94 form a common point of intersection.

(46) In this case, an outside diameter of the second nozzle 46 can be smaller than an outside diameter of the first nozzle 38. These ratios of the diameters to one another can influence the flow conditions of the airflow at the outlet opening 84 of the second nozzle 46. As a result, an optimal flow around the outlet opening 84 of the second nozzle 46 can be achieved.

(47) The inside diameter of the two nozzles 38, 46 is designed in accordance with the viscosity of the fluid to be sprayed or the degree of grinding of the powder. In the case of a fluid having a high viscosity, or a powder having a coarse degree of grinding, the inside diameter is larger than in the case of a fluid having a low viscosity or a powder having a fine degree of grinding. In this case, the inside diameter of the first nozzle 38 that dispenses the airflow can have a larger inside diameter than the second nozzle 46 that dispenses the fluid or powder. As a result, very fine to fine atomization of the fluid or powder can be achieved. The difference of the inside diameters between the first nozzle 38 and the second nozzle 46 can advantageously be 0.1 mm to 0.2 mm. Accordingly, as the viscosity of the fluid increases or as the degree of grinding of the powder increases, the inside diameter of the first nozzle 38 and the inside diameter of the second nozzle 46 can be for example 0.3 mm to 0.2 mm, 0.4 mm to 0.2 mm, 0.4 mm to 0.3 mm or 0.5 mm to 0.3 mm or 0.5 mm to 0.4 mm or 0.6 mm to 0.4 mm or 0.6 mm to 0.5 mm or 0.7 mm to 0.5 mm or 0.7 mm to 0.6 mm or 0.8 mm to 0.7 mm or 0.8 mm to 0.6 mm, etc. (the first value corresponds to the inside diameter of the first nozzle 38, the second value corresponds to the inside diameter of the second nozzle 46).

(48) FIG. 17 shows an alternative arrangement of the nozzles 38, 46 with respect to one another, in which the central axis 94 of the second nozzle 46 is arranged so as to be laterally offset relative to a plane that extends through the central axis 93 of the first nozzle 38. In particular, in this case, the central axis 94 of the second nozzle 46 is arranged between the plane extending through the central axis 93 of the first nozzle 38 and the plane 98 that is tangential to the inner wall 97 of the first nozzle 38. In the case of such an offset arrangement of the two nozzles 38, 46 relative to one another, it is likewise possible for the two central axes 93, 94 of the nozzles 38, 46 to be oriented so as to be askew with respect to one another. In the case of such an askew orientation of the two central axes 93, 94 relative to one another, said axes neither form a common point of intersection, and nor are the central axes 93, 94 oriented so as to be mutually parallel.

(49) According to FIG. 17, in a plan view of the outlet opening 83 of the first nozzle 38, the front face 88 of the second nozzle 46 is arranged obliquely, such that a side edge 104 of the front face 88 is set back relative to the central axis 94, in the fluid dispensing direction, and an opposing side edge 106 of the front face 88 protrudes relative to the central axis 94.