Sprinkler Head Inserts

Abstract

The sprinkler head insert (1) comprises: at least two water nozzle barrels (5), each of which has at least two nozzles (30) configured to produce a water jet that impinges to atomize liquid to produce water droplets; and an injection molding water distribution system (4) for supplying liquid to the at least two water nozzle barrels. The water distribution system comprises: at least two plug-ins (12A, 12B, 12C) for receiving the water nozzle barrels (5); a central water inlet conduit (11) in liquid communication with the first plug-in (12A); and a narrow bore conduit (14) providing high pressure liquid communication between the first plug-in and the second plug-in. The narrow bore conduit is configured to allow the conduit inner mold needle to be removed from the open end of the conduit through the plug-in after injection molding, and in one embodiment, the narrow bore conduit comprises an upwardly depending portion (17) and a downwardly depending portion (18A, 18B). A sprinkler head or sprinkler head assembly including a sprinkler head insert and a water nozzle cartridge for the sprinkler head insert are also provided.

Description

Technical Field

[0001] The present invention relates to a sprinkler head insert for a sprinkler head of the type which produces atomized water droplets from the impact of a high pressure water jet. Background Art

[0002] A water-saving sprinkler head using a lower amount of water at a higher pressure is described in EP 2204508. The sprinkler head employs at least one nozzle body having at least two nozzles configured to produce a water jet, which impacts to atomize the liquid, thereby producing atomized water droplets. It is reported that this sprinkler head uses 2 l / min of water, while a conventional sprinkler head uses up to 11 l / min of water. The nozzle body is shown in Figures 13 and 14 of EP 2204508 and in WO 2011 / 054120. The sprinkler head produced by Gjosa SA includes more than one nozzle body. In this design, a sprinkler insert having a water distribution system and three nozzle bodies (barrels) is provided, the water distribution system including three barrel receiving connectors configured to distribute water to the barrel at about 3 bar. The water distribution system has: a central water inlet conduit in fluid communication with a first cylindrical member receiving plug-in; and a second cylindrical member receiving plug-in and a third cylindrical member receiving plug-in in fluid communication with the first cylindrical member receiving plug-in via a narrow bore conduit. The three cylindrical member receiving plug-ins are arranged around a central portion of the water distribution system, and the narrow bore conduits are bent around the central portion. The fact that the narrow bore conduits are bent means that the water distribution system cannot be injection molded in one piece, as this would hinder the removal of the inner mold. The central portion includes a device for fixing the system to the body of the shower head, and when the system is fixed to the body of the shower head, a sealing closure is applied to the central portion to seal the narrow bore conduits that supply high pressure water from the first plug-in to the second and third conduits. Each of the plug-ins has a closed top portion and an open bottom portion, and the cylindrical member is configured to be inserted into the plug-in from the bottom and screwed into position in the plug-in. High pressure water enters each plug-in located at the head space and two small holes at the top of each nozzle body.

[0003] Thus, the water distribution system has six parts: an injection molded body, a sealing closure in the center portion, a sealing O-ring, and three screws, and needs to be assembled before the cartridge is inserted. Preferably, the water distribution system is provided as a one-piece injection molded component. Furthermore, the cartridge is designed to receive pressurized water through a nozzle at the top of the cartridge, which results in downward pressure being applied to the cartridge in the connector, with the associated risk of the cartridge being forced out of the connector and into contact with the user.

[0004] Sprinkler head inserts are described in US 4415123, GB 2033251, US2008223957 and US 5397064.

[0005] It is an object of the present invention to overcome at least one of the above problems. Summary of the invention

[0006] The present invention provides an insert for a sprinkler head of the type described above which, in one embodiment, solves the problems of the prior art by having a water distribution system that can be injection molded in one piece. This is achieved by redesigning the water distribution system so that the narrow conduit between the first connector and the second connector is constructed to allow the inner mold insert (needle) to be removed from the conduit through the open end of the connector after injection molding. In the embodiment shown, the conduit is angled and includes an upwardly depending straight portion and a downwardly depending portion that allows the inner mold insert (needle) to be removed from each end of the conduit through the open portion of the connector. This Figure 8B It is shown in Figure 8B The upwardly depending portion of the conduit is shown to be disposed at an angle to allow the first inner mold needle (not shown) to be removed from the conduit through the open bottom end of the first connector after injection molding. The same can be done for the second inner mold needle, which is used for injection molding the downward second conduit, and the third inner mold needle, which is used for injection molding the downward third conduit.

[0007] In a first aspect, the invention provides a shower head insert comprising a shower head insert of the type:

[0008] at least two water nozzle cartridges, each of the two water nozzle cartridges being a water nozzle cartridge having at least two nozzles configured to produce water jets that impinge to atomize a liquid to produce water droplets; and an injection molded water distribution system for supplying high pressure liquid to the at least two water nozzle cartridges;

[0009] The water distribution system includes:

[0010] at least two plug-in connectors, the at least two plug-in connectors are used to receive the water nozzle cylindrical member, and

[0011] having at least one open end; a central water inlet conduit in fluid communication with the first connector; and a narrow bore conduit providing high pressure fluid communication between the first connector and the second connector;

[0012] Therein, the narrow bore catheter is configured to allow removal of the catheter in-mold needle from the catheter through at least one open end of the connector after injection molding.

[0013] In another aspect, the present invention provides a water distribution system for a sprinkler head insert, the sprinkler head insert being of the type comprising at least two water nozzle cartridges, the at least two water nozzle cartridges each having at least two nozzles, the at least two nozzles being configured to produce a water jet that impinges to atomize a liquid to produce water droplets;

[0014] The water distribution system includes:

[0015] at least two connectors for receiving the water nozzle barrel; a central water inlet conduit in fluid communication with the first connector; and a narrow bore conduit providing high pressure fluid communication between the first connector and the second connector;

[0016] Therein, the narrow bore catheter is configured to allow removal of the catheter in-mold needle from the catheter through at least one open end of the connector after injection molding.

[0017] In one embodiment, the narrow bore catheter is angled and the narrow bore catheter generally has a first portion (i.e., a proximal portion) that is fluidly connected to the first connector and at least one second portion (i.e., a distal portion) that is fluidly connected to at least a second connector, and the first portion and the second portion are not coaxial.

[0018] In one embodiment, the first portion is upwardly dependent and the or each second portion is downwardly dependent. Fig. 8A and Figure 8B It is shown in Fig. 8A and Figure 8B Shown is an upwardly depending portion 17 and two downwardly depending portions 18. In this embodiment, the inner mould pin is removed through the open bottom end of the connector.

[0019] In another embodiment, the first portion is downwardly dependent and the second portion is upwardly dependent. In this embodiment, the inner mold pin can be removed through the open top of the connector.

[0020] In one embodiment, the plug connector is open at both ends.

[0021] In one embodiment, the water distribution system includes at least three connectors for receiving the water nozzle barrel, wherein the narrow bore conduit includes an upwardly depending portion and at least two downwardly depending portions. Figure 6 As shown in , the conduit may generally be in the shape of a tripod.

[0022] The sprinkler head insert may include three, four or more cylindrical members and a water distribution system including a connector for receiving three, four or more conduits. In most embodiments, the narrow bore conduits are bifurcated to provide pressurized liquid from a first connector to other connectors. However, an insert having a water distribution system including multiple narrow bore conduits is also within the scope of the present invention.

[0023] In one embodiment, the water dispensing system includes at least three connectors for receiving water nozzle cartridges, wherein the narrow bore conduit includes an upwardly depending proximal portion and at least two downwardly depending distal portions.

[0024] In one embodiment, each water nozzle barrel is configured to fit in the plug-in in a fluid-tight manner, and each water nozzle barrel includes a waist portion that defines a channel for supplying water around the water nozzle barrel when the water nozzle barrel is fitted in the plug-in, whereby the proximal end portion of the central water inlet conduit and the narrow bore conduit are in fluid communication with the channel. This provides for supplying pressurized water to the plug-in at the middle portion of the plug-in, thereby applying equal upward and downward forces on the barrel in the plug-in, which in fact cancel each other out and thereby stabilize the barrel in the plug-in. This is an advantage over the prior art, in which the barrel and the plug-in are designed to provide a head space above the barrel for receiving pressurized water, in fact, the pressurized water applies a downward force to the barrel, bringing the risk of causing the barrel to pop out of the shower head and causing injury to the user.

[0025] In one embodiment, the upper part and the lower (skirt) part of the cylindrical member include sealing means, which are used to seal the passage around the cylindrical member. In one embodiment, the sealing means includes one or more elastically deformable sealing rings. In one embodiment, the upper part and the lower part include sealing rings, and optionally include an annular plug-in for the annular sealing ring to be seated. In one embodiment, the upper part includes an annular sealing ring, and the lower part includes two or more annular sealing rings. In one embodiment, the annular sealing rings in the lower part of the cylindrical member have different diameters, wherein the diameter of the sealing ring increases towards the bottom of the lower part.

[0026] In one embodiment, the inlet for each of the two nozzles of each water head cylinder is arranged in the waist portion of the water nozzle cylinder, usually on opposite sides of the waist portion. In one embodiment, the lower portion of the cylinder is hollow, and the nozzle outlet is configured to produce a water jet that impacts in the hollow lower portion.

[0027] In one embodiment, the water nozzle cartridge is configured to snap fit into the plug.

[0028] In one embodiment, the water nozzle cartridge includes an upwardly depending arm configured to engage a top portion of the plug.

[0029] In one embodiment, the insert includes a base fitting configured to attach to the sprinkler head body and clamp to the water distribution system.

[0030] In one embodiment, the water nozzle barrel is injection molded.

[0031] In another aspect, the present invention provides a shower head comprising a shower head insert according to the present invention, the shower head insert being disposed within a shower head body, wherein the shower head body typically comprises an upper portion and a lower portion that are clamped together to enclose the shower head insert. Typically, one of the upper portion or the lower portion, typically the lower portion, is configured for coupling to a base fitting, typically by means of a snap-fit ​​arrangement. In one embodiment, the shower head body is wrapped around the shower head insert.

[0032] In another aspect, the present invention provides a water nozzle barrel, the water nozzle barrel has a body, the body is configured to be fitted in the plug-in connector of the shower head in a fluid-tight manner, and the water nozzle barrel includes at least two nozzles, the at least two nozzles are configured to produce a water jet, the water jet impacts to atomize the liquid, thereby producing water droplets, the body has an upper part, a lower part and a waist part, and the waist part defines a channel for liquid to surround the water nozzle barrel when the barrel is fitted in the plug-in connector. The inlet for the nozzle is arranged on the outer surface of the waist part. The lower part can be hollow to provide a skirt part, and the nozzle outlet can be configured to guide the water jet into the skirt part, thereby impacting in the skirt part. This produces a uniform liquid jet with uniform droplet size. Typically, the skirt extends below the point where the liquid jet impacts. In one embodiment, the upper part and the lower part of the barrel include a sealing device, which is used to seal the channel around the barrel with fluid. In one embodiment, the sealing device comprises one or more elastically deformable sealing rings. In one embodiment, the upper part and the lower part comprise annular plugs for seating the annular sealing rings. In one embodiment, the upper part comprises one annular sealing ring and the lower part comprises two or more annular sealing rings. In one embodiment, the annular sealing rings in the lower part of the cylindrical member have different diameters, wherein the diameter of the sealing rings increases towards the bottom of the lower part.

[0033] In one embodiment, the water nozzle cartridge is configured to snap fit into the plug.

[0034] In one embodiment, the water nozzle cartridge includes an upwardly depending arm portion configured to engage a top portion of the plug connector.

[0035] In another aspect, the invention provides a shower head insert, the shower head insert being of the type comprising:

[0036] at least two water nozzle cartridges, each of the type having at least two nozzles configured to produce water jets that impinge to atomize liquid to produce water droplets; and an injection molded water distribution system for supplying pressurized liquid to the at least two water nozzle cartridges, the water distribution system comprising: at least two connectors for receiving the water nozzle cartridges; a central water inlet conduit in liquid communication with a first connector; and a narrow bore conduit providing high pressure liquid communication between the first connector and a second connector;

[0037] Wherein, each water nozzle barrel is configured to be fitted in a plug-in connector in a fluid-tight manner, and each water nozzle barrel includes a body having an upper portion, a hollow lower portion and a waist portion, wherein the waist portion defines a channel for supplying water around the water nozzle barrel when the water nozzle barrel is fitted in the plug-in connector, wherein each nozzle includes a nozzle inlet (31) and a nozzle outlet (32), wherein the nozzle inlet (31) is arranged on the outer surface of the waist portion, and the nozzle outlet (32) is configured to guide the water jet into the hollow lower portion.

[0038] In one embodiment, the upper and lower parts of the cylindrical member include sealing means for fluid-tightening the passage around the cylindrical member. In one embodiment, the sealing means includes one or more elastically deformable sealing rings. In one embodiment, the upper and lower parts include an annular plug-in for seating the annular sealing rings. In one embodiment, the upper part includes an annular sealing ring, and the lower part includes two or more annular sealing rings. In one embodiment, the annular sealing rings in the lower part of the cylindrical member have different diameters, wherein the diameter of the sealing rings increases towards the bottom of the lower part.

[0039] In one embodiment, the lower portion of the barrel is hollow and the outlet for the nozzle is configured to produce a water jet that impinges in the hollow lower portion, thereby atomizing the droplets.

[0040] In another aspect, the present invention provides a method of forming a sprinkler head of the present invention, the method comprising the steps of: injection molding a water distribution system; removing the inner mold needle of the narrow bore conduit from the injection molded water distribution system through the open end of the plug-in component; and assembling the components to form a sprinkler head.

[0041] Further aspects and preferred embodiments of the invention are defined and described in the further claims listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a perspective view of a shower head according to the present invention shown from above;

[0043] Figure 2 is a perspective view of a sprinkler head according to the present invention shown from below and showing three water nozzle cartridges;

[0044] Figure 3 yes Figure 2 a detailed view of a portion of , showing one of the water nozzle barrels;

[0045] Figure 4A and Figure 4B is a view of a water nozzle barrel of the prior art;

[0046] Figure 5A and Figure 5B is a view of a water nozzle barrel of the present invention and which forms a part of the insert of the present invention;

[0047] Figure 6 yes Figure 1 An exploded view of a sprinkler head of , showing a two-piece sprinkler head body, a water distribution system, three water nozzle cartridges and a base fitting;

[0048] Fig. 7A is a perspective view from above of a shower head insert of the present invention, the shower head insert being clamped in position in a bottom portion of a shower head body;

[0049] Figure 7B is a cutaway perspective view of a water distribution system, wherein the cross section shows the interior of two of the connectors and a portion of a narrow bore conduit;

[0050] Fig. 8A is a perspective view of the water distribution system of the present invention as viewed from above;

[0051] Figure 8B It is along Fig. 8A A cross-sectional view taken along line II of ; and

[0052] Figure 8C is a top view of a section of a water distribution system taken at mid-height of the system. DETAILED DESCRIPTION

[0053] All publications, patents, patent applications, and other references mentioned herein are hereby incorporated by reference in their entirety for all purposes to the same extent as if each individual publication, patent or patent application was specifically and individually indicated to be incorporated by reference and was incorporated by reference in its entirety.

[0054] Definition and general preferences

[0055] As used herein and unless specifically noted otherwise, the following terms are intended to have the following meanings in addition to any broader (or narrower) meanings that these terms may have in the art:

[0056] Unless the context requires otherwise, the singular used herein shall be understood to include the plural, and the plural used herein shall be understood to include the singular. The terms "a" or "an" used in relation to an entity shall be understood to refer to one or more of that entity. Thus, the terms "a" (or "an"), "one or more" and "at least one" are used herein in an interchangeable manner.

[0057] As used herein, the term "comprise" or variations of the term such as "comprising" or "including" should be understood to indicate the inclusion of any mentioned integer (e.g., features, elements, properties, attributes, method / process steps, or limitations) or groups of integers (e.g., features, elements, properties, attributes, method / process steps, or limitations), but not the exclusion of any other integer or group of integers. Therefore, the term "comprising" as used herein is inclusive or open-ended, and does not exclude additional, unmentioned integers or method / process steps.

[0058] It will be appreciated that the water nozzle cartridge and water dispensing system of the present invention may be used with liquids other than water, for example aqueous solutions and non-aqueous solutions such as detergents, cosmetics and dermatological compositions.

[0059] example

[0060] The present invention will now be described with reference to specific examples. These examples are merely exemplary and are used for illustrative purposes only: these examples are not intended to limit the exclusive scope of the claimed protection or the described invention in any way. These examples constitute the best mode currently considered for practicing the present invention.

[0061] Reference Figure 6 , shows a sprinkler head according to the invention, which is generally indicated by reference numeral 1 and comprises a sprinkler body having an upper part 2 and a lower part 3, an injection-molded water distribution system 4, three water nozzle cartridges 5, a base fitting 6, and a clamping ring 7.

[0062] Also refer to Fig. 7A , Figure 7B as well as Fig. 8A , Figure 8B and Figure 8C The water distribution system includes a central water inlet 11, which is fed into a first plug connector 12A through a first inlet 13A. A narrow bore conduit 14 provides fluid communication from the first plug connector 12A to the second plug connector 12B and the third plug connector 12C via an outlet 15. The narrow bore conduit 14 includes an upwardly suspended proximal portion 17, which bifurcates into two downwardly suspended distal portions 18A and 18B, the distal portion 18A feeds into the second plug connector 12B, and the distal portion 18B feeds into the third plug connector 12C. Figure 8B As shown in the figure, the upwardly suspended proximal portion 17 is angled to allow the inner mold needle (not shown) to be retracted from the conduit portion 17 through the open base 20 of the first plug connector 12A after injection molding. Similarly, the downwardly suspended distal portions 18A and 18B are angled to allow the inner mold needle (not shown) to be retracted from the conduit portion 17 through the open base 21 of the second plug connector 12B and the third plug connector 12C after injection molding. Although not shown, the system can be designed so that the inner mold needle can be removed through the open top of the plug connector, which will involve providing a narrow bore conduit in an inverted form.

[0063] Reference Figure 5A and Figure 5B , shows the water nozzle barrel 5 of the present invention in a more detailed manner. The barrel 5 includes a body having a hollow upper portion 25, a hollow lower portion 26, and a waist portion 27 arranged between the upper portion and the lower portion. The purpose of the waist portion is to provide an annular water channel around the barrel when the barrel is fitted into the plug-in. An annular seat 40 ( Figure 5B ), the annular seat portion 40 is used to receive the rubber sealing ring 41 ( Figure 5A), when in use, the rubber seal 41 fluidly seals the cylindrical member in the connector, and the rubber seal 41 is fluidly sealed with the waist portion 27 to ensure that water does not leak from the connector above or below the waist portion, thereby maintaining the operating water pressure. The waist portion 27 includes two angled nozzles 30 (shown in dotted lines), wherein the inlet 31 is arranged on the outer surface of the waist portion, and the outlet 32 ​​is arranged to allow the water jet to be ejected into the lower portion 26, where the water jet impacts and atomizes in the hollow lower portion to produce droplets. A locking clamp 35 is provided at the top of the cylindrical member, and when in use, the clamp is engaged to the top lip 36 of the connector. In contrast, and with reference to Figure 4A and Figure 4B The barrels are short and have a water inlet at the top A for supplying pressurized water which causes a downward pressure on the barrels necessitating the barrels having threads B to allow them to threadably engage with the connectors.

[0064] like Figures 1 to 3 As shown in FIG, the lower portion 3 of the shower head body comprises a triangular cut-out 40 into which the base fitting 6 (attached to the water distribution system) fits. Figure 2 and Figure 3 The underside of the shower head is shown, where the lower end of the cartridge 5 and the water outlet 32 ​​are visible.

[0065] All components are made by injection molding. In the embodiment shown, and with reference to Figure 6 , the sprinkler head comprises eight parts, one of which is a water distribution system, which can be injection molded in one piece. The sprinkler head is assembled by first removing the inner mold needles from the conduit (three needles in this embodiment); and then inserting the three cylindrical pieces into the corresponding plug-ins of the three cylindrical pieces via the open lower ends of the plug-ins. Then, the base fitting is attached to the water distribution system, and then the base fitting and the water distribution system are attached to the lower part of the sprinkler head body. Finally, the upper part of the sprinkler head fitting is clamped to the lower part, and the sealing ring is fitted.

[0066] In use, the central water inlet conduit is fitted to a water source and the water is turned on. High-pressure water travels through the inlet conduit and into the annular conduit defined by the waist portion of the cylindrical member and the connector, where it enters two nozzles, thereby producing two high-pressure water impact jets in the hollow portion of the lower portion of the cylindrical member. The high-pressure water in the annular conduit also enters the narrow-bore conduit and travels to the second and third connectors, where it enters the corresponding annular conduits and enters the nozzles of the second and third conduits, thereby producing two high-pressure water impact jets for each cylindrical member. Thus, the sprinkler head produces three pairs of impact water jets, which are atomized to produce a spray of atomized water droplets.

[0067] Equivalent solution

[0068] The above description details the currently preferred embodiments of the present invention. In view of these descriptions, in practice, it is expected that a large number of modifications and variations of these preferred embodiments will occur to those skilled in the art. These modifications and variations are intended to be included in the claims appended hereto.

Claims

1. A shower head insert (1), the shower head insert (1) being of the type comprising: At least two water nozzle barrels (5), each of which has at least two nozzles (30), and at least two of the nozzles (30) are configured to generate water jets, the water jets impacting to atomize the liquid, thereby generating water droplets; as well as an injection molded one-piece water distribution system (4) for supplying liquid to at least two of the water nozzle barrels; The water distribution system comprises: At least two plug-in connectors, the at least two plug-in connectors being used to receive the water nozzle cylindrical member (5); A central water inlet conduit (11), the central water inlet conduit (11) being in liquid communication with the first connector (12A); and a narrow bore conduit (14), the narrow bore conduit (14) providing high pressure liquid communication between the first connector and the second connector; wherein the narrow bore conduit is angled to allow an inner mold needle of the narrow bore conduit to be removed from the narrow bore conduit through at least one open end of the connector after injection molding, and wherein the angled narrow bore conduit includes an upwardly depending portion (17) and a downwardly depending portion (18).

2. The shower head insert according to claim 1, wherein: The narrow bore catheter includes an upwardly depending proximal portion and one or more downwardly depending distal portions.

3. The shower head insert according to claim 2, wherein: The water distribution system (4) comprises at least three connectors for receiving a water nozzle barrel (5), wherein the narrow bore conduit (14) comprises an upwardly depending proximal portion and at least two downwardly depending distal portions.

4. A shower head insert according to any one of claims 1 to 3, wherein: Each water nozzle barrel (5) is configured to fit in the insert in a fluid-tight manner, and each water nozzle barrel (5) includes a waist portion (27) which defines a channel for supplying water around the water nozzle barrel when the water nozzle barrel is fitted in the insert.

5. The shower head insert of claim 4, wherein: An inlet (31) for each of the two nozzles (30) of each water nozzle barrel is provided in the waist portion (27) of the water nozzle barrel.

6. The shower head insert of claim 4, wherein: The water nozzle cartridge includes a sealing device for fluid-sealing the passage when the water nozzle cartridge is fitted in the connector.

7. The shower head insert of claim 6, wherein: The sealing device comprises: one or more elastically deformable annular sealing rings (41); and a corresponding annular plug-in component (40) for seating the one or more annular sealing rings.

8. The shower head insert of claim 1, wherein: The water nozzle cylindrical member (5) is configured to be snap-fitted into the plug-in member.

9. The shower head insert of claim 8, wherein: The water nozzle barrel (5) includes an upwardly depending arm (35) configured to engage with a top portion (36) of the plug-in.

10. The shower head insert of claim 1, wherein: The water nozzle barrel is injection molded.

11. A shower head comprising a shower head insert according to any one of claims 1 to 10, the shower head insert being arranged in a shower head body.

12. The shower head according to claim 11, wherein: The shower head body comprises an upper part (2) and a lower part (3), which are clamped together to enclose the shower head insert.

13. The shower head according to claim 11, wherein: The sprinkler head body is wrapped around the sprinkler head insert.

14. The shower head according to any one of claims 11 to 13, comprising a base fitting (6) configured to be attached to the shower head body and clamped to the water distribution system.

15. A kit for assembling a sprinkler head insert according to any one of claims 1 to 10 or a sprinkler head according to claim 11.

16. A water nozzle barrel, the water nozzle barrel being used in a shower head, and the water nozzle barrel having a body, the body being configured to be fitted in a plug-in connector of the shower head in a fluid-tight manner, and the water nozzle barrel comprising at least two nozzles (30), the at least two nozzles (30) being configured to produce a water jet, the water jet impacting to atomize a liquid, thereby producing water droplets, the body having: an upper portion (25) having an open top; a hollow lower portion (26) having an open bottom; a waist portion (27) arranged between the upper portion and the hollow lower portion, the waist portion (27) defining a channel for supplying water around the water nozzle barrel when the water nozzle barrel is fitted in the plug-in connector of the shower head in use, wherein The upper portion (25) and the hollow lower portion (26) of the water nozzle barrel include sealing means for fluid-sealing the passage when the water nozzle barrel is fitted in the connector, wherein each nozzle includes an inlet (31) and an outlet (32), the inlet (31) being arranged on the outer surface of the waist portion, and the outlet (32) being configured to direct the water jet into the hollow lower portion so that the water jet impacts within the hollow lower portion.

17. The water nozzle cartridge according to claim 16, wherein: The sealing device comprises: one or more elastically deformable annular sealing rings (41); and a corresponding annular plug-in component (40) for seating the one or more annular sealing rings.

18. The water nozzle cartridge according to claim 17, wherein: The hollow lower portion of the water nozzle barrel includes two or more annular sealing rings (41) of different diameters.

19. A water nozzle cartridge according to any one of claims 16 to 18, wherein: The water nozzle cartridge is configured to snap fit into the plug.

20. The water nozzle cartridge according to claim 19, wherein: The water nozzle barrel includes an upwardly depending arm (35) configured to engage with the top of the plug-in.

21. A shower head insert (1), the shower head insert (1) being of the type comprising: at least two water nozzle barrels (5), each of which has at least two nozzles (30), the at least two nozzles (30) being configured to generate water jets that impinge to atomize the liquid, thereby generating water droplets; and An injection molded water distribution system (4) for supplying liquid to at least two of the water nozzle barrels, and comprising: at least two connectors, at least two of the connectors are used to receive the water nozzle cylindrical member (5) in a fluid-tight manner; a central water inlet conduit (11), the central water inlet conduit (11) is in liquid communication with the first connector (12A); and a narrow bore conduit (14), the narrow bore conduit (14) provides high-pressure liquid communication between the first connector and the second connector; wherein the narrow bore conduit is angled to allow removal of an inner mold needle of the narrow bore conduit from the narrow bore conduit through at least one open end of the connector after injection molding, wherein the angled narrow bore conduit includes an upwardly depending portion (17) and a downwardly depending portion (18); Each water nozzle barrel comprises a body, the body having: an upper portion (25) with an open top; a hollow lower portion (26) with an open bottom; and a waist portion (27) arranged between the upper portion and the hollow lower portion, wherein in use, the waist portion (27) defines a channel for supplying water around the water nozzle barrel when the water nozzle barrel is fitted in the plug-in component of the sprinkler head, wherein the upper portion (25) and the hollow lower portion (26) of the water nozzle barrel comprise a sealing device, the sealing device being used to fluid-seal the channel when the water nozzle barrel is fitted in the plug-in component, wherein each nozzle comprises an inlet (31) and an outlet (32), the inlet (31) being arranged on the outer surface of the waist portion, and the outlet (32) being configured to guide the water jet into the hollow lower portion so that the water jet impacts within the hollow lower portion.

22. A shower head insert according to claim 21, comprising three water nozzle cartridges (5), wherein: The water distribution system (4) comprises three plug-in connectors for receiving the water nozzle cartridge (5) in a fluid-tight manner.

23. The shower head insert of claim 21, wherein: The sealing device comprises: one or more elastically deformable annular sealing rings (41); and a corresponding annular plug-in component (40) for seating the one or more annular sealing rings.

24. A sprinkler head comprising a sprinkler head insert according to any one of claims 21 to 23, the sprinkler head insert being arranged in a sprinkler head body.

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