Discharge for spraying liquid
By introducing peripheral spray curtains and flow separation elements into the outlet, the problem of excessive spray diffusion is solved, and the liquid droplets are concentrated and water conservation is achieved, and it is suitable for precise spraying in hair care applications.
Patent Information
- Application Number
- CN202380042266.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-05-24
- Filing Date
- 2023-05-22
- Publication Date
- 2025-01-03
AI Technical Summary
Existing liquid spraying effluents diffuse too much in use environments, resulting in high velocity and average energy of the droplets, which can easily wet areas that should not be wet, especially in hair care applications, it is difficult to avoid areas outside the scalp being fed. wet.
An outflow member is designed, including a central sprayer and a peripheral nozzle, which produces a main spray of liquid. The peripheral spray forms a curtain around the main spray, trapping and squeezing the droplets to keep them inside the curtain, reducing the spread of the spray, and The flow relationship is controlled by the flow separation element to achieve centralized spraying.
It effectively reduces the diffusion of spray, prevents the droplets from bounce off the scalp and spills to other areas, forms a thin layer of liquid to absorb high-speed droplets, reduces the amount of water used, and ensures good wetting and rinsing effects.
Smart Images
Figure CN119255871A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an outlet for spraying a liquid, such as water or a water-based mixture, for example in domestic plumbing installations or in washing appliances for the human care sector. Background Art
[0002] WO2004 / 101163A1 and US2005 / 00107A1 disclose a shower head with a large number of paired nozzles, each pair of nozzles generating colliding water streams for the purpose of forming a water mist.A shower head should operate well within a certain pressure range.
[0003] BE514104A discloses a spray head having an impinging water stream produced by four inclined holes located in a flat plate at an angle of 45°. The thickness of the flat plate is 1 to 5 mm. The diameter of the holes is said to be less than the 12 mm of the nozzle.
[0004] US2744738 discloses an aerator with an impinging water flow, which comprises a flow guide element after the impingement point.
[0005] US2005 / 011652A1 discloses a nozzle for fire extinguishing. The "solid cone" spray pattern is formed by the interaction or collision of water flows from the inner nozzle. A group of outer nozzles surrounding the inner nozzle spray outward. US2323464A also discloses a nozzle for fire extinguishing, which has a similar structure and has two circles of nozzles.
[0006] WO2013 / 077030A1 shows a shower head with a freely settable jet flow intensity and jet range. It comprises a plurality of nozzles arranged in a plurality of rings and detachably attached to the water through holes of a water spray plate.
[0007] US1052488B2 shows a massage shower head having a hydraulic turbine that drives a shutter to swing between nozzle outlet orifice groups. A central nozzle group is surrounded by annularly arranged nozzle groups.
[0008] US2017 / 173602A1 shows a spray head with a valve for switching between different functions. A first outflow piece with a nozzle ring is arranged to produce a first spray with a specific pattern, such as a wedge shape. The central outflow piece provides an aerated fluid flow, while the peripheral outflow piece has a nozzle in the formed spray surface, which provides a spray shape different from the arrangement shape of the nozzle itself.
[0009] US2019 / 184409A1 shows a spray head with a central "bubbler" and a set of circumferential outflow units, each with multiple nozzles. They are used to save water and / or provide a good spray even at low pressure. A switch allows water to be supplied alternately to the central or peripheral outflow units.
[0010] US8458826 discloses an outflow piece for a shower or faucet, in which water is distributed by means of collision jets at a low flow rate and high pressure (typically over 10 bar). In contrast to the above-mentioned WO2004 / 101163A1, only one or two pairs of nozzles are sufficient for the outflow piece in the shower head. A good washing experience, i.e. a feeling of abundant water flow and good rinsing effect despite a low flow rate, is obtained by atomizing the water by the collision jets, which in turn is a result of the high pressure.
[0011] WO2011 / 054120A1 discloses, for example, Figures 4 to 6 20 to 23, a spray gun for producing a liquid (e.g., water or a water-based mixture) spray from a collision jet. Such a spray gun may be an integrated unit for atomizing and spraying a liquid, a water-based mixture, by impacting a liquid jet under high pressure. Such a prior art spray gun 11 is shown in FIG. 1. The main nozzle group body 13 or the spray gun body is preferably made of a plastic material. The atomized spray is produced by the collision jet of the liquid flowing out of the nozzle 21. The nozzle 21 is defined or made by a nozzle insert 21′ arranged in the spray gun body 13. In other embodiments, the nozzle 21 is formed in the spray gun body 13 itself without a separate nozzle insert. From the spray gun inlet, the liquid first flows into the preparatory chamber 16, then into the intermediate chamber 12, and enters the nozzle 21 from the intermediate chamber. The nozzles are at an angle of 90° to each other. After leaving the nozzle, the water jet flies in the free volume of the cavity, which defines a surface or inner wall 15 serving as a spray former 25, until it hits another jet at the collision point 22. The generated spray is an initial spray 23 located in the spray cylinder body 11. The initial spray 23 is shaped by a spray former 25. It passes through an obstruction element 24, in particular a screen or mesh or a perforated plate, and forms a spray 26 that leaves the spray cylinder 11.
[0012] WO 2019 / 233958 A1 discloses an outflow piece similar to WO 2011 / 054120 A1.
[0013] The problem with such prior art outflow pieces is that the spray spreads too much, depending on the context in which it is used. For example, in hair care applications, it is desirable to spray only the scalp being treated, without wetting the person's face. In addition, the average energy and velocity of the spray droplets are relatively high. This is because the droplets are produced by collision jets. In contrast to standard outflow pieces, such as conventional shower heads, collision jets are used to produce a fine spray with good wetting and rinsing capabilities, even at low flow rates. However, the high velocity of the droplets may cause them to bounce off the scalp and wet other areas in an undesirable manner. Summary of the invention
[0014] Therefore, the object of the present invention is to provide an outflow piece as described above to overcome the above disadvantages. In particular, the object of the present invention is to improve the spray characteristics of the outflow piece.
[0015] These objects are achieved by an outflow piece according to the claim.
[0016] Outlets are used to spray liquids, such as water or water-based mixtures. Outlets include:
[0017] a central atomizer configured to produce a main spray of liquid; the central atomizer comprising a set of at least two nozzles arranged to produce colliding jets of liquid and thereby a spray of liquid droplets, and a spray shaper for directing and shaping the spray of droplets;
[0018] - A set of peripheral nozzles configured to produce a peripheral spray of liquid, the peripheral spray at least partially surrounding the main spray.
[0019] The function of the peripheral spray is to center the main spray. That is, the main spray is confined within the peripheral spray, rather than spreading away from the central axis of the main spray. The peripheral spray forms a curtain that captures and traps droplets from the main spray, keeping them within the curtain. Centering the spray is an advantage, for example in makeup or hair care applications, where it is best to avoid spraying and wetting untreated areas.
[0020] Another effect is that the peripheral spray forms a thin layer of liquid on the object or surface that the main spray is acting on. For hair care applications, this is the human scalp. This layer of liquid absorbs the high-speed droplets of the main spray that might otherwise splash off the object and land where they should not.
[0021] The liquid flow from the individual peripheral nozzles entrains the surrounding air. Thus, a curtain is formed by a combination of air and water flow. The water droplets from the main spray are collected and carried away by this curtain, even in areas where there is no water from the peripheral nozzles.
[0022] In an embodiment, the peripheral spray is around 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 circumference of the main spray. These values are usually measured relative to the geometric center of the plurality of peripheral nozzles. If the outflow member includes a handle for holding it, the open part of the curtain is preferably towards the handle.
[0023] In an embodiment, the geometric center of the plurality of peripheral nozzles is located on the longitudinal axis of the spray former. In embodiments where the central sprayer comprises two or more spray formers, the geometric center of the peripheral nozzle may coincide with the geometric center of the plurality of spray formers.
[0024] In an embodiment, the outflow comprises a supply chamber, and the central sprayer and the peripheral nozzles are both arranged to supply liquid from the supply chamber.
[0025] The supply chamber thus acts as a common supply chamber. It is part of the outflow piece. The outflow piece is usually a hand-held shower head or a sprayer. Thus, there is no separate central sprayer and supply of peripheral nozzles. This makes the construction of the outflow piece simple.
[0026] In an embodiment, the central sprayer and the peripheral nozzles are sized such that the total flow through all peripheral nozzles is between 0.2 and 1.6 times the flow through the central sprayer, in particular between 0.4 and 1.1 times. More particularly, the total flow through all peripheral nozzles is at least approximately the same as the flow through the central sprayer.
[0027] It has been found through experiments that this flow relationship is the best compromise between the need to reduce the total flow on the one hand and the need to effectively contain the main spray within the peripheral spray on the other hand. The desired effect of the outflow piece is the effect of the main spray. The purpose of the peripheral spray is only to reduce the negative effects of the main spray. The overall goal is to use less water. Therefore, the flow rate of the peripheral spray should be as low as possible while still effectively achieving its purpose. This is usually achieved by the above values. Preferably, the total flow rate through all peripheral nozzles is lower than the flow rate through the central sprayer. The best effect can be achieved if the total flow rate through all peripheral nozzles is 0.9 times the flow rate through the central sprayer.
[0028] In an embodiment, this flow relationship is achieved by making the total area of the peripheral nozzles less than twice, 1.1 times, 1 times, or 0.9 times the total area of the inner nozzles. The area of a nozzle is considered to be the minimum cross-sectional area of the nozzle along its length.
[0029] In an embodiment, the peripheral nozzles form a segment of a ring or a complete ring, in particular a segment of a circular ring or a complete annular ring, around the central atomizer.
[0030] In an embodiment, for each peripheral nozzle, its longitudinal axis deviates from the longitudinal axis of the central atomizer by less than twenty degrees, in particular less than ten degrees, and further in particular, is substantially parallel to the longitudinal axis of the central atomizer.
[0031] Thus, the curtain formed by the peripheral spray may form a truncated cone, in particular a truncated circular cone.In the embodiment in which the peripheral nozzles are parallel to the longitudinal axis of the central sprayer, the curtain forms a cylinder, in particular a circular cylinder.
[0032] The longitudinal axis of the central atomizer corresponds to the axis which bisects the angle between the relative inner nozzles. It is also usually the rotational symmetry axis of the shape of the inner surface of the spray former.
[0033] In an embodiment, the average distance of the peripheral nozzles from the longitudinal axis of the central atomizer is between seven and eighteen millimeters, in particular between nine and fourteen millimeters, and further in particular between eleven and twelve millimeters.
[0034] For a circular arrangement, the distance between all peripheral nozzles is the same.
[0035] In an embodiment, the outflow piece comprises forty to one hundred and twenty peripheral nozzles, in particular fifty to eighty peripheral nozzles, and further in particular at least about sixty to seventy peripheral nozzles.
[0036] In an embodiment, the total area of the peripheral nozzles is less than 2 times, or 1.1 times, or 1 times, or 0.9 times the total area of the inner nozzles.
[0037] In an embodiment, the distance between the peripheral nozzles is between 1 mm and 5 mm, in particular between 1 mm and 2 mm, further in particular between 1 mm and 1.5 mm.
[0038] In an embodiment, the inner diameter of the peripheral nozzle is between 0.05 and 0.35 millimeters, in particular between 0.15 and 0.25 millimeters.
[0039] In an embodiment, the inner diameter of the inner nozzle is between 0.6 mm and 1.2 mm, and in particular it is at least about 0.8 mm.
[0040] In an embodiment, the nozzle body comprises two or four or more inner nozzles, and in particular, the inner nozzles have a common collision point.
[0041] In an embodiment, the angle between the inner nozzle and the longitudinal axis of the spray former is between 65 degrees and 90 degrees, in particular between 70 degrees and 80 degrees, in particular at least approximately 75 degrees.
[0042] This angle produces fewer high-speed droplets in the longitudinal direction (i.e. the direction of the spray) than a smaller angle. This in turn produces less force on an object (such as the body or scalp).
[0043] In an embodiment, the nozzle body with the inner nozzle and the skirt with the peripheral nozzle are manufactured as a single piece, in particular from a single piece of plastic material.
[0044] In an embodiment, the peripheral nozzle is produced by drilling.
[0045] In an embodiment, the outflow piece is designed such that the working pressure of the liquid is between 1 and 6 bar, and the combined flow rate of the main spray and the peripheral spray is between 2 and 4 liters per minute, in particular between 2.5 and 3.5 liters per minute.
[0046] In an embodiment, the outflow piece comprises a flow separation element, which comprises at least one additional inflow connection for supplying the liquid to be sprayed. When connected to the central sprayer, in particular the nozzle body, the flow separation element forms a liquid connection from the additional inflow to the first subgroup of inner nozzles, but not to the second subgroup of inner nozzles.
[0047] The flow separation element does not affect the second subgroup, that is, it maintains liquid communication with the second subgroup. When assembled in the outflow piece, the second subgroup of inner nozzles is in liquid communication with the supply chamber, while the first subgroup is not. The flow separation element prevents liquid from the supply chamber from flowing to and through the first subgroup of inner nozzles. The first and second subgroups of inner nozzles do not overlap. The first subgroup is supplied via the flow separation element and the second subgroup is supplied via the supply chamber.
[0048] In an embodiment, the flow separation element and the second subgroup of inner nozzles are supplied via separate supply conduits. Such separate supply conduits may be separate flexible tubes that are incorporated into a common hose for supplying the outflow piece. The first supply conduit is in liquid communication with the first subgroup of inner nozzles (via the flow separation element), and the second supply conduit is in liquid communication with the second subgroup of inner nozzles (via the supply chamber). This arrangement may be used in conjunction with a supply station that, for example, supplies a mixture of water and additives to the first supply conduit and only supplies water to the second supply conduit.
[0049] In an embodiment, the flow separation element and the supply chamber are supplied by a common pipe, and a diverter element is arranged in the outflow piece to control the flow from the common pipe into the supply chamber or the flow separation element or into both at the same time. This allows the main spray to be operated with different flow rates and / or spray characteristics.
[0050] Due to the use of the flow separation element, the same type of nozzle body can be used in the outflow piece with or without the flow separation element, depending on the use of the outflow piece. The nozzle body can be mass-produced with high precision and can be used in both types of applications.
[0051] According to one aspect of the invention, a flow separation element is used with a central sprayer, or in combination with a central sprayer that does not have a peripheral nozzle as described herein. Also in this aspect, the flow separation element can be used to convert a single type of nozzle body to be used for two different fluids from different supplies, rather than just for a single fluid.
[0052] Further embodiments are evident from the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS
[0053] The subject matter of the invention will be explained in more detail below with reference to exemplary embodiments shown in the accompanying drawings, which schematically illustrate:
[0054] FIG1 is a nozzle group unit or spray barrel of the prior art;
[0055] Figure 2-3 is a perspective view of the nozzle body;
[0056] Figure 4 is the longitudinal section of the outflow piece;
[0057] Figure 5 is the longitudinal section of the nozzle body;
[0058] Figure 6-8 It is a variation of the arrangement of the spray former and the peripheral nozzle;
[0059] Figure 9-12 is a flow separation element in different views; and
[0060] Fig.13 It is the nozzle body with the components associated with the flow separation element.
[0061] In principle, identical or functionally identical components are provided with the same reference symbols in the figures. DETAILED DESCRIPTION
[0062] The outflow member 1 comprises at least a nozzle body 20 and a housing 5. The nozzle body 20 is a single piece, usually made of plastic material. It comprises a central sprayer 2 and a group 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 plane 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, a group of inner nozzles 21 for generating liquid collision jets are arranged. This embodiment shows four such inner nozzles 21, and in other embodiments, there may be two or three inner nozzles 21. This embodiment shows that four nozzles have the same collision point 22, and in other embodiments, the first pair of opposing nozzles has a first collision point and the second pair has a second collision point.
[0063] The impinging jets produce a water spray. Methods and devices for producing such a spray, in particular spray cylinders and different spray formers, are described, for example, in the following documents:
[0064] WO201 1 / 054120A2
[0065] WO2011 / 054121A2
[0066] WO2019 / 233958A1
[0067] WO2020 / 070159A1
[0068] Thus, the central sprayer 2 generates a fine water mist. This allows an effective wetting and rinsing operation using relatively little water.
[0069] In this embodiment, compared with 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°, especially about 75°. This reduces the velocity of the droplets in the spray along the longitudinal axis 29.
[0070] The spray of water forms an initial spray 23 which is shaped and directed according to the shape of the inner wall 15 of the spray former 25. The spray leaves the nozzle body 20 and thus the entire outflow piece 1 at the spray former front plane 28 and forms a main spray 26.
[0071] The nozzle body 20 comprises a skirt 31 surrounding the spray former 25 at the spray former front plane 28, in which the peripheral nozzles 3 are arranged around the opening of the spray former 25, from which the main spray 26 leaves the spray former 25. In the embodiment shown, 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 combined spray is then cylindrical. In other embodiments, they are slightly inclined relative to the longitudinal axis 29. Typically, they intersect the longitudinal axis 29 at the same point, so that the combined spray of the peripheral nozzles 3 is truncated conical.
[0072] The combined sprays of the peripheral nozzles 3 form a peripheral spray 36. The peripheral spray 36 constitutes a curtain of liquid and ambient air entrained with the liquid. The curtain collects and carries away droplets in the main spray 26 that would otherwise splash, thereby causing the main spray 26 to spread laterally. Thus, the main spray 26 is concentrated and surrounded. In addition, the curtain can form a layer of water on the scalp, thereby preventing some droplets of the main spray from bouncing.
[0073] Figure 4 The nozzle body 20 is shown arranged in a housing 5. The housing 5 is only shown in a very schematic manner. It can be part of a shower head 55, such as Figure 8 As shown, or another hand-held sprayer, with or without a handle 52 for easy operation. It may include a connector 53 for connecting a hose, and an inlet 54 for supplying liquid to the supply chamber 4 of the outflow member 1. The housing 5 can be composed of several parts. In this embodiment, the nozzle body 20 is inserted into the housing 5 and fixed by a threaded cap 51.
[0074] The supply chamber 4 is arranged to supply liquid to the inner nozzle 21 for the main spray 26 and to the peripheral nozzle 3 for the peripheral spray 36. Therefore, these nozzles are all operated at the same liquid pressure. The dimensions of the inner nozzle 21 and the peripheral nozzle 3 are such that the required total flow rate and the required relationship between the flow rate of the main spray 26 and the flow rate of the peripheral spray 36 can be achieved at the target working pressure of the liquid.
[0075] Typical operating parameters are:
[0076] Pressure: 1 bar to 6 bar;
[0077] Total flow rate: 2.5 to 3.5 L / min;
[0078] Main spray flow rate: 1.5 to 2 liters / minute;
[0079] Peripheral spray flow rate: 1 to 1.5 L / min.
[0080] Typical other parameters could be:
[0081] Dn - nozzle diameter: between 0.6 mm and 1.2 mm, in particular at least about 0.8 mm.
[0082] Hb - maximum distance between the spray former rear end 27 and the spray former front plane 28: between 12 mm and 33 mm, in particular between 24 mm and 28 mm, in particular at least approximately 26 mm.
[0083] The distance Hd from the rear end 27 of the spray former to the collision point 22 is between 1 and 4 mm, in particular between 2 and 3 mm.
[0084] Ds - inner diameter of the spray former 25: 8 to 18 mm, preferably 14 mm.
[0085] Phi_n - angle between the longitudinal axes of two opposing inner nozzles 21: 150° + / - 30°.
[0086] The outer portion of the rear end of the nozzle body 20 is truncated cone-shaped. The cone has a lower portion and an upper portion, and the angle of the truncated cone of the upper portion is smaller than that of the truncated cone of the lower portion. Since the angle between the inner nozzle 21 and the longitudinal axis 29 is relatively large, the inner nozzle 21 of the upper portion is easier to manufacture.
[0087] The holes for the inner nozzle 21 and / or the peripheral nozzle 3 can be produced by drilling or laser erosion or laser engraving or chemical etching.
[0088] Figure 2-5 The central sprayer 2 shown in the figure comprises a single spray former 25 and a corresponding inner nozzle 21. In other embodiments, the central sprayer 2 comprises two, three or more spray formers 25 and corresponding inner nozzle groups 21. These produce corresponding two, three or more sprays, which together constitute the main spray 26. One or more spray formers 25 can be manufactured as part of a single nozzle body 20. Figure 6 The embodiment in which the central atomizer 2 is formed by two spray formers 25 is shown. The peripheral nozzles 3 form a rectangular or rounded rectangular outline. They completely surround the central atomizer 2. Figure 7 An embodiment is shown in which the central atomizer 2 is formed by two spray formers 25. The peripheral nozzles 3 form the outline of a portion of an ellipsoid. They only partially surround the central atomizer 2. They surround more than three quarters of the main spray generated by the two spray formers 25. Figure 8An embodiment is shown with three spray formers 25 forming a central sprayer 2. The peripheral nozzles 3 form a partial outline of an ellipsoid. They only partially surround the central sprayer 2. They surround about two thirds of the main spray generated by the three spray formers 25. The central sprayer 2 and the peripheral nozzles 3 are shown as part of an outflow piece 1 with a handle. The arrangement of the peripheral nozzles 3 and the corresponding curtain formed by the peripheral spray 36 are open towards the handle.
[0089] Figure 9-12 A flow separation element 6 is shown. It is designed to be connected to the nozzle body 20. When connected to the nozzle body 20, the flow separation element 6 provides a separate fluid supply for the first subgroup 61 and the second subgroup 62 of the inner nozzles 21 (see Fig.13 ). The flow separation element 6 covers the portion of the nozzle body 20 where the inlet of the inner nozzle 21 is located. For the first subset 61 of the inner nozzle 21, it has one or more channels 66 to establish a fluid connection from the additional inlet 63 or multiple additional inlets 63 to the flow separation element 6, rather than a fluid connection from the inlet 54 of the supply chamber 4 to the flow separation element. For the second subset 62, it has a channel or groove 64 to establish a fluid connection between the second subset 62 and the supply chamber 4. The shape of the connection surface 65 of the flow separation element 6 is designed to be consistent with the outer shape of the nozzle body 20 at the corresponding connection surface 65' around the inlet of the inner nozzle 21. In this way, when the flow separation element 6 is connected to the nozzle body 20, the flow separation element 6 provides a channel as described above and blocks the flow from the supply chamber 4 to the first subset 61.
[0090] The shape of the recess 67 in the flow separation element 6 corresponds to the protrusion 67' of the nozzle body 20 so as to form a defined relative orientation between the flow separation element 6 and the nozzle body 20 when assembled, when rotated about the longitudinal axis 29 of the nozzle body 20. More generally, the alignment element of the flow separation element 6 is arranged to engage with the alignment element of the nozzle body 20.
[0091] Although the present invention has been described by means of the present embodiments, it should be clearly understood that the invention is not limited thereto but may be embodied and practiced in other various ways within the scope of the claims.
Claims
1. An outflow member (1) for spraying a liquid such as water or a water-based mixture, comprising a central atomizer (2) configured to produce a main spray (26) of liquid; the central atomizer (2) comprising a set of at least two inner nozzles (21) arranged to produce colliding jets of liquid and thereby a spray of liquid droplets, and a spray shaper (25) for directing and shaping the spray of droplets; A set of peripheral nozzles (3) configured to generate a peripheral spray (36) of liquid, said peripheral spray (36) at least partially surrounding the main spray (26).
2. The outflow piece (1) according to claim 1, comprising a supply chamber (4), wherein both the central sprayer (2) and the peripheral nozzles (3) are arranged to be supplied with liquid from the supply chamber (4).
3. An outflow piece (1) according to any of the preceding claims, wherein the dimensions of the central sprayer (2) and the peripheral nozzles (3) are such that the total flow through all peripheral nozzles (3) is 0.2 to 1.6 times, in particular 0.4 to 1.1 times, the flow through the central sprayer (2), and even more in particular, wherein the total flow through all peripheral nozzles (3) is at least approximately the same as the flow through the central sprayer (2).
4. The outflow piece (1) according to any one of the preceding claims, wherein the peripheral nozzle (3) forms a segment of a ring or a complete ring, in particular a segment of a circle or a complete circular ring, around the central atomizer (2).
5. An outflow piece (1) according to any of the preceding claims, wherein for each peripheral nozzle (3), the deviation of its longitudinal axis from the longitudinal axis of the central sprayer (2) is less than 20 degrees, in particular less than 10 degrees, and in particular, it is substantially parallel to the longitudinal axis of the central sprayer (2).
6. Outflow piece (1) according to any of the preceding claims, wherein the average distance of the peripheral nozzles (3) from the longitudinal axis of the central atomizer (2) is between seven and eighteen millimeters, in particular between nine and fourteen millimeters, and in particular between eleven and twelve millimeters.
7. The outflow piece (1) according to any of the preceding claims, comprising forty to one hundred and twenty peripheral nozzles (3), in particular fifty to eighty peripheral nozzles (3), and further in particular at least about sixty to seventy peripheral nozzles (3).
8. The outflow piece (1) according to any of the preceding claims, wherein the total area of the peripheral nozzles (3) is 2 times or 1.1 times or 1 times or 0.9 times smaller than the total area of the inner nozzles (21).
9. The outflow piece (1) according to any one of the preceding claims, wherein the inner diameter of the peripheral nozzle (3) is between 0.05 and 0.35 mm, in particular between 0.15 and 0.25 mm.
10. The outflow piece (1) according to any one of the preceding claims, wherein the inner diameter of the inner nozzles (21) is 0.6 mm to 1.2 mm, and in particular wherein the inner diameter is at least approximately 0.8 mm.
11. The outflow piece (1) according to any of the preceding claims, wherein the central atomizer (2) comprises two or four or more inner nozzles (21), and in particular wherein the inner nozzles (21) have the same collision point (22).
12. An outflow piece (1) according to any one of the preceding claims, wherein the angle between the inner nozzle (21) and the longitudinal axis of the spray former (25) is between 65 degrees and 90 degrees, in particular between 70 degrees and 80 degrees, in particular wherein the angle is at least about 75 degrees.
13. Outlet piece (1) according to any of the preceding claims, wherein the central atomizer (2) with the inner nozzle (21) and the skirt (31) with the peripheral nozzle (3) are manufactured as a single piece, in particular a single piece of plastic material.
14. Outlet piece (1) according to any one of the preceding claims, wherein the peripheral nozzle (3) is produced by drilling.
15. The outflow piece (1) according to any of the preceding claims, which is designed for a working pressure of the liquid of 1 to 6 bar, and the combined flow rate of the main spray (26) and the peripheral spray (36) is 2 to 4 liters per minute, in particular 2.5 to 3.5 liters per minute.
16. Outlet piece (1) according to any one of the preceding claims, comprising a flow separation element (6) comprising at least one additional inlet (63) for supplying the liquid to be sprayed; When connected to the central sprayer (2), a liquid connection (66) is established from the at least one additional flow inlet (63) to the first subgroup (61) of inner nozzles (21), while no fluid connection is established to the second subgroup (62) of inner nozzles (21).
17. A flow separation element (6) for use in combination with a central atomizer (2) configured to generate a main liquid spray (26); the central atomizer (2) comprising at least two inner nozzles (21) of nozzle groups, each nozzle group comprising at least two inner nozzles (21) arranged to generate colliding jets of liquid and thus generate a liquid droplet spray, and a spray former (25) for guiding and shaping the droplet spray, The flow separation element (6) comprises at least one additional inlet (63) for supplying the liquid to be sprayed; The flow separation element (6) when connected to the central atomizer (2) forms a liquid connection (66) from the at least one additional flow inlet (63) to a first subgroup (61) of internal nozzles (21), while not forming a fluid connection to a second subgroup (62) of internal nozzles (21).