Outlet for spraying liquid

Abstract

The outlet (1) serves to spray a liquid such as water or an aqueous mixture. The outlet 1 comprises: a central sprayer (2) configured to generate a main spray (26) of the liquid, the central sprayer (2) including a set of at least two nozzles (21) arranged to generate a colliding jet of the liquid, thereby generating a spray of droplets of the liquid, and a spray shaper (25) for guiding and shaping the spray of droplets; and a set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, the peripheral spray (36) at least partially surrounding the main spray (26). The peripheral spray (36) serves to converge and enclose the main spray (26).

Description

Technical Field

[0001] The present invention relates to an outlet for spraying a liquid such as water or an aqueous mixture, for example, in a cleaning facility used in the field of household piping equipment or for the treatment of the human body.

Background Art

[0002] WO 2004 / 101163 and US 2005 / 001072 disclose a shower head having a number of nozzle pairs, each nozzle pair generating impinging jets for the purpose of generating a spray of water. The shower head is thought to operate well over a certain pressure range.

[0003] Belgian Patent No. 514104 discloses a spray head having impinging water jets generated by four holes inclined at an angle of 45° within a flat plate. The thickness of the plate is 1 - 5 mm. The diameter of the holes is said to be smaller than 12 mm for the nozzles.

[0004] US Patent No. 2744738 discloses an aerator having impinging water jets, including a flow guiding element after the impingement point.

[0005] US 2005 / 011652 discloses a spray head for extinguishing a fire. A "solid cone" spray pattern is formed by the interaction or impingement of water sprays from inner nozzles. A set of outer nozzles surrounding the inner nozzles spray outward. US 2323464 also discloses a nozzle for fire extinguishing having a similar structure with two rings of nozzles.

[0006] WO 2013 / 077030 shows a shower head whose jet intensity and injection range can be freely set. This comprises a plurality of nozzles arranged in a plurality of rings and detachably attached to the water passage holes of a water injection plate.

[0007] U.S. Patent No. 10 525 488 describes a massage shower head with a hydraulic turbine that drives a shutter to vibrate across a group of nozzle exit holes. The central nozzle bank is surrounded by a ring-shaped arrangement of nozzles.

[0008] U.S. Patent Application Publication 2017 / 173602 describes a spray head having a valve configured to switch between different functions. A first outlet having a nozzle ring is configured to produce a first spray having a specific pattern, such as a wedge shape. A central outlet provides an aerated flow of fluid, and a peripheral outlet has a nozzle with a formed spray surface that provides a spray having a shape different from the arrangement shape of the nozzle itself.

[0009] U.S. Patent Application Publication 2019 / 184409 describes a spray head having a central "bubbler" and a set of circumferential water outlet units, each having multiple jet orifices. They help provide water-saving and / or good spray even at low pressure. A switch allows for alternative water supply to the central or periphery outlets.

[0010] U.S. Patent No. 8,458,826 discloses an outlet for a shower or tap in which water is discharged via an impinging jet at low flow rate and high pressure, typically exceeding 10 bar. In contrast to the aforementioned International Publication No. 2004 / 101163, only one or two pairs of nozzles are sufficient for the showerhead outlet. A good cleaning experience, i.e., sufficient water flow and a good rinsing sensation despite the low flow rate, is obtained by atomizing the water by the impinging jet, which is a result of the high pressure.

[0011] International Publication No. 2011 / 054120 discloses a cartridge for generating a spray of a liquid, such as water or an aqueous mixture, from an impinging jet, for example, in embodiments shown in Figures 4-6 and 20-23. Such a cartridge may be an integrated unit for atomizing and spraying such an aqueous mixture by impinging a liquid jet under high pressure. Such a prior art cartridge 11 is shown in Figure 1. The main nozzle set body 13 or cartridge body is preferably made of a plastic material. The atomized spray is generated by impinging a liquid jet flowing from a nozzle 21. The nozzle 21 is defined by or made within a nozzle insert 21' located in the cartridge body 13. In other embodiments, the nozzle 21 is molded into the cartridge body 13 itself without a separate nozzle insert. From the cartridge inlet, the liquid first flows into a preliminary chamber 16, then into an intermediate chamber 12, and from there into the nozzle 21. The nozzles are positioned at a 90° angle to each other. After leaving the nozzle, the water jet flies through the free volume of a cavity defining the surface or inner wall 15, which acts as a spray shaper 25, until it strikes another jet at a point of impact 22. The resulting spray is the initial spray 23 inside the cartridge 11. The initial spray 23 is shaped by the spray shaper 25, which passes through the occluding element 24, particularly a sieve or mesh or perforated plate, to form the spray 26 that exits the cartridge 11.

[0012] International Publication No. 2019 / 233958 discloses the same exit strategy as International Publication No. 2011 / 054120. [Overview of the project] [Problems that the invention aims to solve]

[0013] A problem with such conventional outlets is that, depending on the situation in which they are used, the spray can spread too much. For example, in hair care applications, it is desirable to spray only the scalp being treated, without wetting the person's face. Furthermore, the average energy and velocity of the spray droplets are relatively high. This is due to the fact that droplets are generated by impinging jets. Impinging jets are used to produce a fine spray with good wetting and rinsing ability even at low flow rates, compared to standard outlets such as conventional showerheads. However, if the droplets are at high speed, they can bounce off the scalp and wet other areas in undesirable ways. [Means for solving the problem]

[0014] Therefore, the object of the present invention is to create the type of outlet described earlier that overcomes the aforementioned drawbacks. In particular, the object is to improve the spray characteristics of the outlet.

[0015] These objectives are achieved by exiting through the claims. The outlet is useful for spraying liquids such as water or aqueous mixtures. A central sprayer configured to produce a main spray of liquid, comprising a set of at least two nozzles arranged to produce a pulsating jet of liquid, thereby producing a spray of liquid droplets, and a spray shaper for guiding and shaping the spray of droplets, A set of peripheral nozzles configured to produce a peripheral spray of liquid, the peripheral spray comprising a set of peripheral nozzles that at least partially surrounds a main spray.

[0016] The effect of peripheral spray is to focus the primary spray. That is, instead of spreading away from the central axis of the primary spray, the primary spray remains contained within the peripheral spray. The peripheral spray forms a curtain that captures droplets and deflects them away from the primary spray so that they remain within the curtain. Having a focused spray is advantageous, for example, in cosmetic or hair care applications, where it is preferable to avoid spraying and wetting in untreated areas.

[0017] A further effect may be that the peripheral spray creates a thin layer of liquid on the object or surface to which the main spray is applied. In the case of hair care applications, this would be the human scalp. This layer absorbs the high-speed droplets of the main spray, otherwise they would scatter from the object and reach undesirable locations.

[0018] The liquid flow from the separate peripheral nozzles drags the surrounding air along with it. As a result, the air and water flows combine to form a curtain. Droplets from the main spray are captured and carried by this curtain even in areas of the curtain where there is no water from the peripheral nozzles.

[0019] In some embodiments, the peripheral spray surrounds one-third, one-half, two-thirds, or three-quarters of the main spray. Conversely, the curtain corresponding to the peripheral spray is open around two-thirds, one-half, one-third, or one-quarter of the main spray's periphery. These values ​​are typically measured with respect to the geometric center of the peripheral nozzle. If the outlet has a handle for holding it, the open portion of the curtain is preferably oriented toward the handle.

[0020] In the embodiment, the geometric center of the peripheral nozzle lies on the longitudinal axis of the spray shaping unit. In the embodiment in which the central sprayer comprises two or more spray shaping units, the geometric center of the peripheral nozzle can coincide with the geometric center of the spray shaping unit.

[0021] In an embodiment, the outlet comprises a supply chamber, and both the central sprayer and the peripheral nozzles are configured to be supplied with liquid from the supply chamber.

[0022] Thus, the supply chamber functions as a common supply chamber. This is part of the outlet. The outlet is typically a handheld showerhead or sprayer. Thus, there is no separate supply source for the central sprayer and the peripheral nozzles. This simplifies the configuration of the outlet.

[0023] In an embodiment, the central sprayer and the peripheral nozzles are sized such that the total flow rate through all the peripheral nozzles is 0.2 to 1.6 times, particularly 0.4 to 1.1 times, the flow rate through the central sprayer. More specifically, the total flow rate through all the peripheral nozzles is at least approximately the same as the flow rate through the central sprayer.

[0024] Experimentally, it has been found that such a flow relationship is an optimal compromise between the requirement to reduce the total flow rate and the requirement to effectively contain the main spray within the peripheral spray. The desired effect of the outlet is the action of the main spray. The purpose of the peripheral spray is only to reduce the adverse effects of the main spray. The overall purpose is to use little water. Thus, the flow rate of the peripheral spray should be as low as possible while still being effective for its purpose. This is generally achieved with the above values. Preferably, the total flow rate through all the peripheral nozzles is lower than the flow rate through the central sprayer. There may be an optimal value when the total flow rate through all the peripheral nozzles is 0.9 times the flow rate through the central sprayer.

[0025] In an embodiment, such a flow relationship is achieved by the total area of the peripheral nozzles being less than 2 times or 1.1 times or 1 times or 0.9 times the total area of the inner nozzles. The area of the nozzle is considered to be the minimum cross-sectional area of the nozzle along its length.

[0026] In an embodiment, the peripheral nozzles form a part of a ring or a complete ring, particularly a part of a circle or a complete circular ring, around the central sprayer.

[0027] In an embodiment, for each of the peripheral nozzles, its longitudinal axis is deviated by less than 20 degrees, particularly less than 10 degrees, from the longitudinal axis of the central sprayer, and more particularly is substantially parallel to the longitudinal axis of the central sprayer.

[0028] As a result, the curtain formed by the peripheral spray can form a frustum of a cone, particularly a circular frustum of a cone. In an embodiment where the peripheral nozzles are parallel to the longitudinal axis of the central sprayer, the curtain forms a cylinder, particularly a circular cylinder.

[0029] The longitudinal axis of the central sprayer corresponds to the axis that bisects the angle between the opposing inner nozzles. This is typically also the axis of rotational symmetry of the shape of the inner surface of the spray shaper.

[0030] In an embodiment, the average distance of the peripheral nozzles from the longitudinal axis of the central sprayer is 7 to 18 millimeters, particularly 9 to 14 millimeters, and more particularly 11 to 12 millimeters.

[0031] In the case of a circular arrangement, the distances of all the peripheral nozzles are the same. In an embodiment, the outlet comprises 40 to 120 peripheral nozzles, particularly 50 to 80 peripheral nozzles, and more particularly at least about 60 to 70 peripheral nozzles.

[0032] In an embodiment, the total area of the peripheral nozzles is smaller than 2 times or 1.1 times or 1 times or 0.9 times the total area of the inner nozzles.

[0033] In an embodiment, the distance between the peripheral nozzles is 1 to 5 millimeters, particularly 1 to 2 millimeters, and more particularly 1 to 1.5 millimeters.

[0034] In the embodiment, the inner diameter of the peripheral nozzle is 0.05 to 0.35 millimeters, particularly 0.15 to 0.25 millimeters.

[0035] In this embodiment, the inner diameter of the inner nozzle is 0.6 mm to 1.2 mm, and in particular at least about 0.8 mm.

[0036] In the embodiment, the nozzle body comprises two or more inner nozzles, and these inner nozzles in particular have a common collision point.

[0037] In the embodiment, the angle between the inner nozzle and the longitudinal axis of the spray shaping device is 65 to 90 degrees, particularly 70 to 80 degrees, and especially at least about 75 degrees.

[0038] Compared to smaller angles, such angles result in fewer high-speed droplets being produced in the longitudinal direction, i.e., the direction of the spray. This reduces the force exerted on objects such as the body or scalp.

[0039] In this embodiment, the nozzle body having the inner nozzle and the skirt having the peripheral nozzle are manufactured as a single component, particularly as a single component made of plastic material.

[0040] In this embodiment, the peripheral nozzle is manufactured by perforation. In the embodiment, the outlet is designed for a liquid operating pressure between 1 and 6 bar, as well as for a total flow rate of the main spray and peripheral spray between 2 and 4 liters / min, particularly between 2.5 and 3.5 liters / min.

[0041] In the embodiment, the outlet is provided with a flow separation element, which includes at least one further inlet connection for supplying the liquid to be sprayed. When coupled to a central sprayer, particularly to a nozzle body, the flow separation element forms a liquid communication from the further inlet to a first subset of the inner nozzles, but does not form a liquid communication to a second subset of the inner nozzles.

[0042] The flow separation element does not affect the second subset, i.e., it leaves the liquid communication to the second subset open. When assembled at the outlet, the second subset of the inner nozzle is in liquid communication with the supply chamber, while the first subset is not. The flow separation element prevents liquid from the supply chamber from flowing into the first subset of the inner nozzle and from flowing through the inner nozzle. The first and second subsets of the inner nozzle do not overlap. The first subset is supplied via the flow separation element, and the second subset is supplied via the supply chamber.

[0043] In this embodiment, a second subset of flow separation elements and inner nozzles are supplied through a separate supply conduit. Such a separate supply conduit may be a separate flexible tube combined with a common hose for supplying to the outlet. The first supply conduit is in liquid communication with the first subset of inner nozzles (via the flow separation elements), and the second supply conduit is in liquid communication with the second subset of inner nozzles (via the supply chamber). This arrangement can be used in combination with a supply station that, for example, supplies a mixture of water and additives to the first supply conduit and only water to the second supply conduit.

[0044] In this embodiment, the flow separation element and the supply chamber are supplied via a common conduit, and a flow deflection element is positioned at the outlet to control the flow from the common conduit and direct it through either or both the supply chamber or the flow separation element. This makes it possible to operate the main spray with different flow rates and / or spray characteristics.

[0045] Thanks to the flow separation element, the same type of nozzle body can be used regardless of whether or not a flow separation element is present at the outlet, depending on the outlet application. The nozzle body can be mass-produced with high precision and can be used for any application.

[0046] According to one aspect of the present invention, a flow separation element is provided for a central sprayer or in combination with a central sprayer without peripheral nozzles as described herein. In this aspect as well, the flow separation element can be used to convert a single type of nozzle body to be used with two different fluids from different sources, instead of using it with a single fluid.

[0047] Further embodiments are evident from the dependent claims. The subject matter of the present invention will be described in more detail below with reference to exemplary embodiments shown in the accompanying drawings. [Brief explanation of the drawing]

[0048] [Figure 1] Conventional nozzle set unit or cartridge. [Figure 2] Perspective view of the nozzle body. [Figure 3] Perspective view of the nozzle body. [Figure 4] Longitudinal cross-section of the outlet. [Figure 5] A longitudinal cross-section of the nozzle body. [Figure 6] Modified configuration for arranging a spray molding device and surrounding nozzles. [Figure 7] Modified configuration for arranging a spray molding device and surrounding nozzles. [Figure 8] Modified configuration for arranging a spray molding device and surrounding nozzles. [Figure 9] Flow separation elements in different diagrams. [Figure 10] Flow separation elements in different diagrams. [Figure 11] Flow separation elements in different diagrams. [Figure 12] Flow separation elements in different diagrams. [Figure 13] A nozzle body having elements related to flow separation. [Modes for carrying out the invention]

[0049] As a general rule, identical or functionally identical parts are given the same reference numeral in the diagram.

[0050] The outlet 1 comprises at least a nozzle body 20 and a shell 5. The nozzle body 20 is typically a single piece of plastic material. It comprises a central sprayer 2 and a set of peripheral nozzles 3 surrounding the central sprayer 2. The central sprayer 2 comprises a hollow spray former 25 extending from the rear end 27 of the spray former to the front end 28 of the spray former. The spray former 25 has the shape of a hollow cylinder. Near the rear end 27 of the spray former is a set of inner nozzles 21 for generating impinging jets of liquid. This embodiment shows four such inner nozzles 21, while in other embodiments, two or three inner nozzles 21 may be present. This embodiment shows four nozzles so as to have a common impingement point 22, while in other embodiments, a first pair of opposing nozzles has a first impingement point, a second pair has a second impingement point, and so on.

[0051] Impinging jets generate water sprays. Methods and apparatus for generating such sprays, particularly cartridges and different spray shaping devices, are described below, for example.

[0052] International Publication No. 2011 / 054120 International Publication No. 2011 / 054121 • International Publication No. 2019 / 233958 • International Publication No. 2020 / 070159 Therefore, the central sprayer 2 generates a fine spray of water. This allows for effective wetting and rinsing operations using a relatively small amount of water.

[0053] In this embodiment, in contrast to the prior art, the angle between the longitudinal axis of the inner nozzle 21 and the longitudinal axis 29 of the main spray is relatively large, for example, between 65° and 90°, and particularly about 75°. This reduces the velocity of droplets in the spray in the direction of the longitudinal axis 29.

[0054] The water spray forms an initial spray 23, which is shaped and guided according to the shape of the inner wall 15 of the spray shaping device 25. The spray exits the nozzle body 20 and then the entire outlet 1 at the front surface 28 of the spray shaping device, forming the main spray 26.

[0055] The nozzle body 20 includes a skirt 31 surrounding the spray shaping device 25 at the front surface 28 of the spray shaping device, and the peripheral nozzles 3 are positioned within the skirt 31 around the opening of the spray shaping device 25 through which the main spray 26 exits the spray shaping device 25. In the illustrated embodiment, the peripheral nozzles 3, i.e., their respective longitudinal axes, are parallel to the longitudinal axis 29 of the main spray 26. The shape of the composite spray is then cylindrical. In other embodiments, they are slightly inclined with respect to the longitudinal axis 29. Typically, they intersect the longitudinal axis 29 at the same point, so the composite spray of the peripheral nozzles 3 has a frustoconical shape.

[0056] The combined spray from the peripheral nozzle 3 forms a peripheral spray 36. The peripheral spray 36 constitutes a curtain of liquid and ambient air dragged along with the liquid. The curtain captures and captures droplets that would otherwise scatter from the main spray 26, spreading the main spray 26 laterally. This concentrates and contains the main spray 26. Furthermore, the curtain can generate a layer of water on the scalp, thereby preventing some of the droplets from the main spray from splashing back.

[0057] Figure 4 shows the nozzle body 20 positioned within the shell 5. The shell 5 is shown only in a very schematic manner. It may be part of a shower head 55, as shown in Figure 8, or another type of handheld sprayer, and may or may not have a handle 52 for ease of operation. It may include a fitting 53 for attaching a hose and an inlet 54 for supplying liquid to the supply chamber 4 of the outlet 1. The shell 5 may consist of several parts. In this embodiment, the nozzle body 20 is inserted into the shell 5 and held in place by a screw-on cap 51.

[0058] The supply chamber 4 is configured to supply liquid to the inner nozzle 21 for the main spray 26 and the peripheral nozzle 3 for the peripheral spray 36. Therefore, all these nozzles operate at the same liquid pressure. The dimensions of the inner nozzle 21 and the peripheral nozzle 3 are such that, at the target operating pressure of the liquid, the desired total flow rate and the desired relationship between the flow rates of the main spray 26 and the peripheral spray 36 are achieved.

[0059] Typical operating parameters are as follows: • Pressure: 1 bar to 6 bar • Total flow rate: 2.5-3.5 liters / minute • Main spray flow rate: 1.5-2 liters / minute • Surrounding spray flow rate: 1-1.5 liters / minute.

[0060] Typical additional parameters may be as follows: • Dn - Nozzle diameter: 0.6mm to 1.2mm, especially at least approximately 0.8mm.

[0061] • Maximum distance between the rear end 27 of the Hb-spray shaper and the front end 28 of the spray shaper: 12-33 mm, especially 24-28 mm, especially at least about 26 mm.

[0062] • Distance Hd from the rear end 27 of the spray shaper to the impact point 22: 1-4 mm, especially 2-3 mm.

[0063] • Inner diameter of Ds-spray shaper 25: 8-18 mm, preferably 14 mm

[0064] • Phi_n - Angle between the longitudinal axes of two opposing inner nozzles 21: 150°+ / -30°.

[0065] The outer portion of the rear end of the nozzle body 20 is frustoconical. The cone shape has a lower and an upper section, and the angle of the frustoconical at the upper section is smaller than the angle of the frustoconical at the lower section. This makes it easier to manufacture the inner nozzle 21 of the upper section, considering that the angle between the inner nozzle 21 and the longitudinal axis 29 is relatively large.

[0066] The holes for the inner nozzle 21 and / or peripheral nozzle 3 can be manufactured by drilling, or by laser erosion, laser etching, or chemical etching.

[0067] The central sprayer 2 shown in Figures 2 to 5 comprises a single spray shaping unit 25 and associated inner nozzles 21. In other embodiments, the central sprayer 2 comprises two, three, or more spray shaping units 25, each having an associated set of inner nozzles 21. These generate two, three, or more corresponding sprays, together constituting the main spray 26. One or more spray shaping units 25 can be manufactured as part of a single nozzle body 20. Figure 6 shows an embodiment having two spray shaping units 25 constituting the central sprayer 2. The peripheral nozzles 3 form a rectangular or rounded rectangular contour. They completely surround the central sprayer 2. Figure 7 shows an embodiment having two spray shaping units 25 constituting the central sprayer 2. The peripheral nozzles 3 form a partial ellipsoidal contour. They only partially surround the central sprayer 2. They surround more than three-quarters of the main spray generated by the two spray shaping units 25. Figure 8 shows an embodiment having three spray shaping units 25 constituting the central sprayer 2. The peripheral nozzles 3 form the outline of a portion of the ellipsoid. They partially surround the central sprayer 2. They surround approximately two-thirds of the main spray produced by the three spray shaping units 25. The central sprayer 2 and the peripheral nozzles 3 are shown to be part of the outlet 1 having a handle. The arrangement of the peripheral nozzles 3, and the corresponding curtain formed by the peripheral spray 36, opens toward the handle.

[0068] Figures 9 to 12 show the flow separation element 6, which is designed to be joined to the nozzle body 20. When joined to the nozzle body 20, the flow separation element 6 provides separate fluid supplies to a first subset 61 and a second subset 62 of the inner nozzle 21 (see Figure 13). The flow separation element 6 covers the portion of the nozzle body 20 where the inlet to the inner nozzle 21 is located. For the first subset 61 of the inner nozzle 21, it provides a channel 66 that establishes a fluid connection to the flow separation element 6 from a further inlet 63 or further inlet 63, rather than from the inlet 54 of the supply chamber 4. For the second subset 62, it provides a channel or recess 64 that establishes a fluid connection between the second subset 62 and the supply chamber 4. The joining surface 65 of the flow separation element 6 is molded to match the outer shape of the nozzle body 20 at the corresponding joining surface 65' around the inlet to the inner nozzle 21. In this way, the flow separation element 6 is joined to the nozzle body 20, and the flow separation element 6 provides a channel as described, blocking the flow from the supply chamber 4 to the first subset 61.

[0069] The recess 67 of the flow separation element 6 is shaped to correspond to the projection 67' of the nozzle body 20, so as to establish a relative orientation defined between the flow separation element 6 and the nozzle body 20 during assembly, with respect to rotation around the longitudinal axis 29 of the nozzle body 20. More generally, the alignment element of the flow separation element 6 is positioned to engage with the alignment element of the nozzle body 20.

[0070] Although the present invention has been described in this embodiment, it is clearly understood that the present invention is not limited thereto and can be embodied and implemented in various other ways within the scope of the claims.

Claims

1. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, For each of the peripheral nozzles (3), its longitudinal axis is offset by less than 20 degrees, particularly less than 10 degrees, from the longitudinal axis of the central sprayer (2), and more particularly, is substantially parallel to the longitudinal axis of the central sprayer (2), wherein the outlet (1) is located.

2. The outlet (1) according to claim 1, comprising a supply chamber (4), wherein both the central sprayer (2) and the peripheral nozzle (3) are configured to be supplied with liquid from the supply chamber (4).

3. The outlet (1) according to claim 1, wherein the central sprayer (2) and the peripheral nozzles (3) are sized such that the total flow rate through all the peripheral nozzles (3) is 0.2 to 1.6 times, particularly 0.4 to 1.1 times, the flow rate through the central sprayer (2), and more specifically, the total flow rate through all the peripheral nozzles (3) is at least substantially the same as the flow rate through the central sprayer (2).

4. The outlet (1) according to claim 1, wherein the peripheral nozzle (3) forms part of or a complete ring, in particular part of or a complete annulus, around the central sprayer (2).

5. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, The average distance of the peripheral nozzles (3) from the longitudinal axis of the central sprayer (2) is 7 to 18 millimeters, particularly 9 to 14 millimeters, and even more particularly 11 to 12 millimeters, at the outlet (1).

6. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, An outlet (1) comprising 40 to 120 peripheral nozzles (3), particularly 50 to 80 peripheral nozzles (3), and even more particularly at least about 60 to 70 peripheral nozzles (3).

7. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, The total area of ​​the peripheral nozzles (3) is less than twice, 1.1 times, 1 time, or 0.9 times the total area of ​​the inner nozzles (21) at the outlet (1).

8. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, The inner diameter of the peripheral nozzle (3) is 0.05 to 0.35 millimeters, particularly 0.15 to 0.25 millimeters, and the outlet (1).

9. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, The inner diameter of the inner nozzle (21) is 0.6 mm to 1.2 mm, and in particular at least about 0.8 mm, and is the outlet (1).

10. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, The central sprayer (2) comprises two or more inner nozzles (21), in particular, these inner nozzles (21) having an outlet (1) with a common collision point (22).

11. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, The angle between the inner nozzle (21) and the longitudinal axis of the spray shaper (25) is 65 to 90 degrees, particularly 70 to 80 degrees, and especially at least about 75 degrees, at the outlet (1).

12. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, The central sprayer (2) having the inner nozzle (21) and the skirt (31) having the peripheral nozzle (3) are manufactured as a single piece, particularly as a single piece of plastic material, the outlet (1).

13. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, The aforementioned peripheral nozzle (3) is produced by drilling, and is an outlet (1).

14. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, Equipped with, An outlet (1) is designed for an operating pressure of the liquid between 1 and 6 bar, and for a total flow rate of the main spray (26) and the peripheral spray (36) between 2 and 4 liters / min, particularly between 2.5 and 3.5 liters / min.

15. An outlet (1) for spraying a liquid, - A central sprayer (2) configured to generate a main spray (26) of the liquid, comprising a set of at least two inner nozzles (21) arranged to generate an impinging jet of the liquid, thereby generating a spray of liquid droplets, and a spray shaper (25) for guiding and shaping the spray of the droplets, - A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of the liquid, wherein the peripheral spray (36) surrounds the main spray (26) at least partially, - comprising a flow separation element (6), wherein the flow separation element (6) is - Equipped with at least one further inlet (63) for supplying the liquid to be sprayed, - When joined to the central sprayer (2), it forms a liquid communication (66) from the at least one additional inlet (63) to the first subset (61) of the inner nozzle (21), but does not form a liquid communication to the second subset (62) of the inner nozzle (21). Exit (1).

16. The outlet (1) according to any one of claims 1 to 15, wherein the liquid is water or an aqueous mixture.

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