Water discharge nozzle and shower head

Abstract

To provide a water discharge nozzle and a shower head capable of suppressing the loss of generated fine bubbles and injecting the fine bubbles.SOLUTION: A water discharge nozzle according to the present invention comprises a substantially cylindrical housing having a flow channel formed therein, a fine bubble generating mechanism disposed in the flow channel, and a dispersion plate provided at the outflow side end of the flow channel, wherein the above fine bubble generating mechanism consists of a first swirling flow forming plate having a plurality of inclined holes, a cylindrical bubble generating member including an aperture with a small inner diameter in the middle region in the longitudinal direction, and a second swirling flow forming plate having the plurality of inclined holes, and the fine bubble generation mechanism is arranged so that the water flow passing through the second swirling flow forming plate directly reaches the dispersion plate.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a water-discharging nozzle and a showerhead, and more particularly to a water-discharging nozzle and a showerhead that generate fine bubbles in water. [Background technology]

[0002] In recent years, technology that generates so-called "fine bubbles" (microscopic air bubbles) in water has been attracting attention as a technology that can improve the water purification and cleaning properties of water. Such "fine bubbles" are known to be classified into two types: "microbubbles" with a bubble diameter of 1 μm or more but less than 100 μm, and "ultrafine bubbles" with a bubble diameter of less than 1 μm.

[0003] Well-known technologies for generating "ultrafine bubbles" in water, which are small in diameter, include the "high-speed swirling flow method" and "pressurized dissolution method," which generate "ultrafine bubbles" from "microbubbles" in water, and the "surfactant-added micropore method" and "cavitation method," which generate "ultrafine bubbles" directly in a water flow.

[0004] As an example of a product that applies the technology for generating "fine bubbles" described above, Patent Document 1 discloses a technology for connecting a bubble generator to a showerhead, the bubble generator comprising: a liquid flow path body having a liquid flow path hole in which an inlet, an outlet, a liquid inlet hole on the inlet side, and a liquid outlet hole on the outlet side are connected, whereby liquid flows from the inlet into the liquid flow path hole and the liquid that has flowed into the liquid flow path hole flows out of the outlet; a first vortex former that is disposed in the liquid inlet hole and forms a first vortex around the center line of the liquid flow path hole in the liquid outflow hole; and a second vortex former that is disposed in the liquid outflow hole between the first vortex former and the outlet and forms a second vortex around the center line of the liquid flow path hole in the same rotational direction as the first vortex in the liquid in the liquid outflow hole between the first vortex and the inner circumference of the liquid flow path hole.

[0005] Patent Document 2 discloses a technology for applying a liquid treatment nozzle to a showerhead, in which a through-type liquid flow path is formed with a liquid inlet opening at one end face of a nozzle body and a liquid outlet opening at the other end face, and at least a portion of the axial direction of the inner peripheral surface of the liquid flow path is formed as a cavitation treatment device in which a spiral groove is engraved for one or more revolutions with the axis as the spiral center line, and a portion of the flow of liquid supplied to the liquid flow path is distributed to the spiral groove of the cavitation treatment device, and the distributed liquid is caused to swirl within the spiral groove while accelerating, so that the internal space of the spiral groove, which is depressurized by the increased liquid speed, becomes a cavitation region, thereby causing the dissolved gas to be reduced pressure and precipitated. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2021-20141 A [Patent Document 2] JP 2022-116684 A Summary of the Invention [Problem to be solved by the invention]

[0007] The above-mentioned conventional fine bubble generating mechanisms can be added directly to commercially available showerheads, and are therefore highly convenient. However, in these conventional technologies, when the water flowing out of the generating mechanism flows through the flow path of the showerhead, the water flow comes into contact with various additional mechanisms installed in the flow path, and as a result, the fine bubbles that exist just after the generating mechanism are lost when they reach the nozzle of the showerhead.

[0008] For example, if a dechlorination cartridge is placed in the flow path of the handle of the shower head to remove chlorine from the water flow, or if a structure is applied that branches into multiple smaller flow paths inside the head to switch the water flow coming out of the nozzle, some of the generated fine bubbles will be lost when the water flow passes through these components.This has caused a problem in that the amount of fine bubbles expected from the design specifications of the generation mechanism cannot be sprayed from the shower head.

[0009] The present invention has been made based on the above background, and has an object to provide a water-discharging nozzle and showerhead that can spray the generated fine bubbles while minimizing their loss. [Means for solving the problem]

[0010] In order to solve the above problems, one representative aspect of the present invention is a water-discharging nozzle including a roughly cylindrical housing having a flow path formed therein, a fine-bubble generating mechanism disposed in the flow path, and a sprinkler plate provided at the outlet end of the flow path, the fine-bubble generating mechanism comprising a first swirling flow-forming plate having a plurality of inclined holes, a cylindrical bubble-generating member including a throttle section with a small inner diameter in a longitudinal intermediate region, and a second swirling flow-forming plate having a plurality of inclined holes, and is positioned so that the water flow that has passed through the second swirling flow-forming plate reaches the sprinkler plate directly.

[0011] Another aspect of the present invention is a showerhead including a cylindrical handle member having a first flow path formed therein, and a water-discharging nozzle attached to one end of the handle member, in which the water-discharging nozzle includes a substantially cylindrical housing having a second flow path formed therein that communicates with the first flow path, a fine-bubble generating mechanism arranged in the second flow path, and a spray plate provided at the outlet end of the second flow path, in which the fine-bubble generating mechanism comprises a first swirl-flow-forming plate having a plurality of inclined holes, a cylindrical bubble-generating member that includes a throttle section with a small inner diameter in a longitudinal intermediate region, and a second swirl-flow-forming plate having a plurality of inclined holes, and is positioned so that the water flow that has passed through the second swirl-flow-forming plate reaches the spray plate directly.

[0012] According to the present invention having such a configuration, the water flow that has passed through the second swirling flow forming plate of the fine bubble generating mechanism is positioned to reach the spray plate directly, so that the generated fine bubbles can be sprayed with minimal loss. [Brief description of the drawings]

[0013] [Figure 1] 1A and 1B are an external view and a partial cross-sectional view showing an overview of a water-discharging nozzle that is a representative example of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view showing an outline of the microbubble generating mechanism shown in FIG. [Diagram 3] 3 is a schematic diagram showing an overview of a first swirl flow forming plate in the fine bubble generating mechanism shown in FIG. 2. [Figure 4] 3 is a schematic diagram showing an overview of a second swirl flow forming plate in the fine bubble generating mechanism shown in FIG. 2. FIG. [Diagram 5] 11A and 11B are an external view and a partial cross-sectional view showing an overview of a water-discharging nozzle according to a modified example of the present invention. [Figure 6] FIG. 6 is a schematic diagram showing an overview of the obstacle member shown in FIG. 5. [Figure 7] FIG. 1 is an external view showing an outline of a shower head according to another embodiment of the present invention. [Figure 8] 8 is a partial cross-sectional view showing an overview of the showerhead shown in FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Representative examples of the water-discharging nozzle according to the present invention and a showerhead using the same will be described below with reference to FIGS.

[0015] <Example 1> Fig. 1 is an external view and a partial cross-sectional view showing an outline of a water-discharging nozzle which is a representative example of the present invention. Fig. 2 is a cross-sectional view showing an outline of the fine-bubble generating mechanism shown in Fig. 1. Fig. 3 is a schematic diagram showing an outline of a first swirl-flow forming plate in the fine-bubble generating mechanism shown in Fig. 2. Fig. 4 is a schematic diagram showing an outline of a second swirl-flow forming plate in the fine-bubble generating mechanism shown in Fig. 2.

[0016] As shown in Fig. 1, a water-discharging nozzle 100 according to one embodiment of the present invention includes a substantially cylindrical housing 110 having a flow path formed therein, a fine bubble generating mechanism 120 arranged in the flow path inside the housing 110, and a water spray plate 130 provided at the outlet end of the flow path. Also, as shown in Fig. 1(a), the water-discharging nozzle 100 is connected via a coupling member 10 to a water supply hose 20 that supplies hot water or cold water from a water supply source (such as a hot water heater). As a result, a water flow WF flows in from the water supply hose 20, and a bubbly water flow BF containing fine bubbles is sprayed from the water spray plate 130 of the water-discharging nozzle 100.

[0017] 1(b), the housing 110 includes an inlet tube portion 112 that is formed in a substantially cylindrical shape from a material such as metal or plastic, and has a coupling portion 112a at one end thereof that is coupled to the coupling member 10. On the other hand, a fixing member 114 that sandwiches and fixes a fine-bubble generating mechanism 120 and a sprinkler plate 130, which will be described later, is provided at the other end of the housing 110. The housing 110 has an inlet flow path C1 into which the water flow WF flows, a bubble generating flow path C2 in which the fine-bubble generating mechanism 120 is housed, and an outlet flow path C3 formed between the fine-bubble generating mechanism 120 and the sprinkler plate 130, which are continuously formed therein.

[0018] As shown in FIG. 2, as an example, the fine bubble generation mechanism 120 includes a first swirling flow forming plate 122 having a plurality of inclined holes, a cylindrical bubble generating member 124 including a throttle portion RP with a small inner diameter in the longitudinal intermediate region, and a second swirling flow forming plate 126 having a plurality of inclined holes. Further, as particularly shown in FIG. 2(a), in the bubble generating member 124, the inner diameter D2 at the throttle portion RP is the smallest, and as an example, it is preferable that the relationship of "D2 < D3 < D1" holds between the inflow side inner diameter D1 and the outflow side inner diameter D3.

[0019] As an example, all the members constituting the fine bubble generation mechanism 120 are formed of a resin material such as hard plastic. And the water flow WF that has passed through the second swirling flow forming plate 126 is arranged so as to directly reach the water spraying plate 130.

[0020] As shown in FIG. 3, the first swirling flow forming plate 122 includes a bottom surface portion 122a on which a plurality of inclined holes 122c are formed substantially on a circumference, and a side wall portion 122b standing up on the outer periphery of the bottom surface portion 122a. Further, as shown in FIG. 2(a), the inner diameter of the side wall portion 122b of the first swirling flow forming plate 122 is formed to be substantially the same as the outer diameter of the inflow side end portion of the bubble generating member 124. Thus, the first swirling flow forming plate 122 is attached so as to fit without a gap to the inflow side of the bubble generating member 124.

[0021] In the example shown in FIG. 3, on the bottom surface portion 122a of the first swirling flow forming plate 122, four inclined holes 122c whose hole opening positions are shifted in the direction of arrow A1 between one surface (the top view side) and the other surface (the bottom view side) are formed at equal intervals. Thus, when the water flow WF flows in from the water supply hose 20 to the bottom surface side of the first swirling flow forming plate 122, the water flow that has passed through the plurality of inclined holes 122c formed in the bottom surface portion 122a is jetted in the inclined direction of these inclined holes 122c, and as a result, it becomes a swirling flow and flows to the rear flow side. Note that, in the first swirling flow forming plate 122 shown in FIG. 3, the case where four inclined holes 122c are formed at equal intervals substantially on a circumference is illustrated, but the number of inclined holes 122c may be appropriately selected according to the overall size and the nature of the flowing water flow WF.

[0022] As shown in Figure 2(b), the bubble generating member 124 is, for example, composed of a reduced diameter section 124a whose inner diameter gradually decreases from the inlet end side toward the constriction section RP, an enlarged diameter section 124b whose inner diameter gradually increases from the constriction section RP toward the outlet end side, and a flange section 124c for attaching the second swirling flow forming plate 126 described later.

[0023] The water-discharging nozzle 100 of the present invention employs the so-called "cavitation method" as a technology for generating fine bubbles, in which gas dissolved in liquid is used to generate "ultra-fine bubbles" through the "cavitation phenomenon." This "cavitation method" does not require any additional flow paths or pipes for taking in gas such as air, which is the raw material for fine bubbles, between the inlet tube 112, to which the water supply hose 20 is connected, and the water spray plate 130 in the water-discharging nozzle 100 of the present invention, so that the structure of the water-discharging nozzle 100 can be simplified and the overall size can be reduced.

[0024] In order to generate fine bubbles using the cavitation method mentioned above, A flow path is formed inside the bubble-generating member 124, including a reduced flow path RC that gradually converges toward the throttle portion RP, and an expanded flow path EC that gradually expands from the throttle portion RP. The water flow WF that flows into the bubble-generating member 124 is pressurized by flowing through the reduced flow path RC, and is rapidly depressurized by passing through the throttle portion RP and flowing through the expanded flow path EC. With this structure, fine bubbles are generated in the water flow WF passing through the bubble-generating member 124 by the "cavitation phenomenon."

[0025] As shown in Fig. 4, the second swirl flow forming plate 126 is composed of a bottom surface portion 126a having a plurality of inclined holes 126c formed on a substantially circular circumference, a side wall portion 126b standing on the outer periphery of the bottom surface portion 126a, and a support portion 126d formed at the end of the side wall portion 126b for supporting the sprinkler plate 130. As shown in Fig. 2(a), the outer diameter of the side wall portion 126b of the second swirl flow forming plate 126 is formed to be substantially the same as the inner diameter of the flange portion 124c of the bubble generating member 124, so that the second swirl flow forming plate 126 is attached so as to fit snugly against the outlet side of the bubble generating member 124.

[0026] In the example shown in FIG. 4, six inclined holes 126c are formed at equal intervals on the bottom surface 126a of the second swirling flow forming plate 126, with the opening positions of the holes shifted in the direction of the arrow A2 between one surface (top view side) and the other surface (bottom view side). As a result, when the water flow WF containing fine bubbles flows from the bubble generating member 124 into the bottom surface side of the second swirling flow forming plate 126, the water flow that passes through the multiple inclined holes 126c formed on the bottom surface 126a is sprayed toward the inclination direction of these inclined holes 126c, and becomes a further stirred swirling flow and flows to the downstream side. Note that, in the second swirling flow forming plate 126 shown in FIG. 4, the case where six inclined holes 126c are formed at equal intervals on a substantially circular circumference is illustrated as an example, but the number of inclined holes 126c may be appropriately selected depending on the overall size and the properties of the flowing water flow WF.

[0027] The water spray plate 130 is configured as a thin plate member having a plurality of fine through holes formed therein, as is applied to a general commercially available shower head, etc. In this case, the plurality of fine through holes formed in the water spray plate 130 are preferably arranged along the direction of the swirling flow flowing out from the fine bubble generating mechanism 120 (i.e., the inclination direction of the inclined holes 126c of the second swirling flow forming plate 126 described above). This allows the bubbly water flow BF to be sprayed smoothly from the water spray plate 130.

[0028] 1(b), the water-spraying plate 130 is fixed to the outflow side end of the housing 110 in a state in which it is sandwiched by the fixing member 114, with the fixing member 114 overlapping the support portion 126d of the second swirl flow forming plate 126. At this time, it is preferable to place a sealing member such as an O-ring (not shown) between the fixing member 114 and the second swirl flow forming plate 126 and the water-spraying plate 130. This ensures that the flow path formed inside the housing 110 in the water-discharging nozzle 100 is airtight and watertight, making it possible, for example, to discharge water by the bubbly water flow BF while the water-discharging nozzle 100 is still placed in a bathtub or the like.

[0029] The operation of spraying the bubbly water flow BF containing fine bubbles using the water-discharging nozzle 100 will be described below.

[0030] First, when the water flow WF flows into the inlet flow passage C1 in the inlet tube portion 112 from the water supply hose 20 at a predetermined water pressure, the water flow WF passes through the multiple inclined holes 122c of the first swirl flow forming plate 122 and flows as a swirling flow into the reduced flow passage RC of the air bubble generating member 124. At this time, as shown in Fig. 1(b) , in the air bubble generating flow passage C2, the outer periphery of the flange portion 124c of the air bubble generating member 124 is in contact with the inner surface of the air bubble generating flow passage C2 without any gaps, so that the water flow WF flows downstream only through the inclined holes 122c of the first swirl flow forming plate 122. As a result, the swirling flow of the water flow WF that has passed through the first swirl flow forming plate 122 is in a state higher in pressure than when it flowed in.

[0031] Next, the swirling water flow WF that has passed through the first swirling flow forming plate 122 is gradually pressurized while passing through the reduced flow path RC of the bubble generating member 124, and then the water flow WF is suddenly depressurized while passing through the expanded flow path EC via the throttle portion RP. At this time, minute fine bubbles are formed inside the swirling water flow WF due to the above-mentioned "cavitation phenomenon."

[0032] Next, the swirling bubbly water flow BF that has passed through the enlarged flow path EC of the bubble-generating member 124 flows into the outlet-side flow path C3 as a further swirling flow by passing through the inclined holes 126c of the second swirling flow forming plate 126. At this time, as shown in Fig. 2(a), the inner surface of the flange portion 124c of the bubble-generating member 124 and the outer circumferential surface of the side wall portion 126b of the second swirling flow forming plate 126 are in contact with each other without any gaps, so that the swirling flow of the bubbly water flow BF that has passed through the second swirling flow forming plate 126 is pressurized and flows out into the outlet-side flow path C3.

[0033] Next, the swirling flow of the bubbly water flow BF that has flowed out into the outlet flow path C3 passes through fine through-holes formed in the water spray plate 130, and is then discharged from the water-discharge nozzle 100 at a predetermined water pressure. At this time, the bubbly water flow BF is further pressurized in the outlet flow path C3 and passes through the water spray plate 130, so that the fine bubbles contained in the bubbly water flow BF are further crushed and discharged in a finer state. This makes it possible to obtain a bubbly water flow BF that contains a sufficiently large number of fine bubbles.

[0034] Next, a modified example of the water-discharging nozzle according to the present invention will be described with reference to Figures 5 and 6. Figure 5 is an external view and a partial cross-sectional view showing the outline of a water-discharging nozzle according to a modified example of the present invention. Also, Figure 6 is a schematic diagram showing the outline of the obstruction member shown in Figure 5.

[0035] As shown in Figure 5, water-discharging nozzle 100 according to a modified example of the present invention includes a substantially cylindrical housing 110, a fine bubble generating mechanism 120 arranged in a flow path inside housing 110, a water-spraying plate 130 provided at the outlet end of the flow path, and an obstruction member 140 arranged in the inlet flow path. Also, as shown in Figure 5(a), water-discharging nozzle 100 is connected to a water supply hose 20 via a coupling member 10.

[0036] The obstruction member 140 disposed in the inlet flow passage C1 inside the inlet tube portion 112 of the housing 110 is composed of a base member 142 formed in a shape that conforms to the inner surface of the inlet flow passage C1, and a plurality of fin members 144 disposed on the base member 142, as shown in Fig. 6 as an example. Such obstruction member 140 intentionally disturbs the flow of the water flow WF led to the first swirl flow forming plate 122 of the fine-bubble generating mechanism 120 on the upstream side, thereby functioning to further increase the efficiency of fine bubble generation by the fine-bubble generating mechanism 120 in the wake. Note that the obstruction member 140, like the other members, is formed of a resin material such as hard plastic.

[0037] As an example, the height and width of the base member 142 are determined by taking into consideration a balance between maximizing the amount of water flow WF flowing through the inlet flow passage C1 and maximizing the number of fin members 144 that intentionally disturb the flow of the water flow WF. An appropriate length of the base member 142 in the flow direction of the water flow WF is selected by conducting an experiment in advance to generate fine bubbles. The base member 142 may be configured to have a non-slip function between the inner surface of the inlet tube portion 112 of the housing 110 and the base member 142 based on a so-called "key and key groove" relationship.

[0038] As one example, the multiple fin members 144 have a shape that tapers from the base member 142 to the tip. The height of the fin members 144 is set within an appropriate range so as to maximize the amount of water flow WF flowing through the inlet flow path C1 while at the same time disturbing the flow of the water flow WF in a more complex manner.

[0039] 6 shows an example in which the multiple fin members 144 are arranged in three rows along the direction of the water flow WF, but any number of rows can be used in consideration of the efficiency of disturbing the flow. Also, in FIG. 6, the rows are shown aligned along the flow, but they may be arranged randomly as long as it is possible to intentionally disturb the flow of the water flow WF, which is the purpose of the fin members 144.

[0040] With the above-mentioned configuration, the water-discharging nozzle of the present invention is positioned so that the water flow that has passed through the second swirling flow-forming plate of the fine-bubble generating mechanism arranged in the flow path inside the housing reaches the spray plate directly, making it possible to spray the generated fine bubbles with reduced loss.

[0041] <Example 2> Fig. 7 is an external view showing an outline of a showerhead according to another embodiment of the present invention, and Fig. 8 is a partial cross-sectional view showing an outline of the showerhead shown in Fig. 7. In Example 2, in the schematic diagrams shown in Figs. 1 to 6, components that are the same as or in common with Example 1 are given the same reference numerals and repeated description thereof will be omitted.

[0042] 7, a showerhead 200 according to another example of the present invention includes a cylindrical handle member 210 having a first flow path formed therein, and a water-discharging nozzle 100 that is attached to one end of the handle member 210 and forms a second flow path. The showerhead 200 is connected to a water supply hose 20 via a connecting member 10 at an inlet tubular section 212 that is located at the end opposite the water-discharging nozzle 100. As a result, when a water flow WF flows in from the water supply hose 20, a bubbly water flow BF containing fine bubbles is sprayed from the water spray plate 130 via the handle member 210 and the water-discharging nozzle 100.

[0043] As an example, the water-discharging nozzle 100 of the showerhead 200 according to the second embodiment includes, similarly to the first embodiment, a substantially cylindrical housing 110, a fine-bubble generating mechanism 120 disposed in a flow path within the housing 110, a spray plate 130 provided at the outlet end of the flow path, and an obstruction member 140 disposed in the inlet flow path C1. Meanwhile, in the second embodiment, the water-discharging nozzle 100 is further configured to include a side wall portion 116 that defines the inlet flow path C1 that communicates with the upper end of the handle member 210, in order to change the direction of the water flow WF flowing in from the handle member 210 at a substantially right angle and release it as a bubbly water flow BF from the spray plate 130, as shown in Fig. 8, for example.

[0044] As an example, the handle member 210 is configured as a substantially cylindrical member with a flow path (first flow path) C4 formed therein, as shown in Figure 8. The handle member 210 includes at one end the inlet tubular portion 212 that is connected to the water supply hose 20 via the connecting member 10, as described above, and at the other end a connecting end 214 for connecting the inlet side flow path C1 of the water-discharging nozzle 100 to the first flow path C4.

[0045] With showerhead 200 configured in this way, fine bubbles are generated in fine bubble generating mechanism 120 of water-discharging nozzle 100 attached to the tip of handle member 210 in response to water flow WF supplied from handle member 210, and these are then sprayed directly from spray plate 130 as bubbly water flow BF, making it possible to use the showerhead in a way that limits loss of the generated fine bubbles, as in Example 1. Note that while the showerhead 200 shown in Figures 7 and 8 illustrates a case in which the water-discharging nozzle 100 and handle member 210 are attached at a substantially right angle, a structure in which the water-discharging nozzle 100 and handle member 210 are attached so that they can be turned at any angle may be adopted in consideration of user convenience.

[0046] 8, as an example of the showerhead 200 of the second embodiment, a filter member 220 for removing chlorine components from the water flow WF flowing in from the water supply hose 20 may be replaceably attached to the first flow path C4 of the handle member 210. This makes it possible to reduce the burden on the skin of a user who uses the showerhead 200.

[0047] As an example of the use of the showerhead 200 according to the above-mentioned Example 2, when the amount of optically generated fine bubbles was measured using, for example, a laser diffraction particle size distribution measuring device, it was confirmed that there were approximately 400 million ultra-fine bubbles in 1 ml (milliliter).

[0048] With the above-mentioned configuration, the showerhead of the present invention uses a water-discharge nozzle in which the water flow passes through the second swirling flow forming plate of the fine-bubble generating mechanism located in the flow path inside the housing and reaches the spray plate directly, thereby enabling the use of a shower with reduced loss of the generated fine bubbles.

[0049] The above-described embodiment is merely an example of the water-discharging head or shower head according to the present invention, and the present invention is not limited to each embodiment. Furthermore, a person skilled in the art can make various modifications without departing from the spirit of the present invention, and these modifications are not excluded from the scope of the present invention. [Explanation of symbols]

[0050] 10 Connecting member 20 Water supply hose 100 Water nozzle 110 Cabinet 112 Inflow cylinder part 114 Fastening member 116 Side wall 120 Microbubble Generation Mechanism 122 First swirl flow forming plate 122a Bottom part 122b Side wall part 122c inclined hole 124 Bubble generating member 124a Reduced diameter section 124b Expanded diameter part 124c Tsubabe 126 Second swirl forming plate 126a Bottom part 126b Side wall part 126c inclined hole 126d Support part 130 Sprinkler Board 140 Obstacles 142 Base material 144 Fin member 200 shower head 210 Handle parts 212 Inflow cylinder part 214 Joining end BF Bubble Water Flow RP Constriction WF water flow

Claims

1. A water-discharging nozzle including a substantially cylindrical housing having a flow path formed therein, a microbubble generating mechanism disposed in the flow path, and a water-discharging plate provided at an outlet end of the flow path, The fine bubble generating mechanism comprises a first swirling flow forming plate having a plurality of inclined holes, a cylindrical bubble generating member including a throttle portion having a small inner diameter in a longitudinal intermediate region, and a second swirling flow forming plate having a plurality of inclined holes, The water flow passing through the second swirl flow forming plate is arranged to directly reach the water spray plate. Water discharge nozzle.

2. The water flow passage further includes an obstacle member disposed upstream of the microbubble generating mechanism for intentionally disturbing the water flow. The water-discharging nozzle according to claim 1.

3. A showerhead including a cylindrical handle member having a first flow path formed therein, and a water-discharging nozzle attached to one end of the handle member, the water-discharging nozzle includes a substantially cylindrical housing having a second flow path formed therein and communicating with the first flow path, a fine bubble generating mechanism disposed in the second flow path, and a water-spraying plate provided at an outlet end of the second flow path, The fine bubble generating mechanism comprises a first swirling flow forming plate having a plurality of inclined holes, a cylindrical bubble generating member including a throttle portion having a small inner diameter in a longitudinal intermediate region, and a second swirling flow forming plate having a plurality of inclined holes, The water flow passing through the second swirl flow forming plate is arranged to directly reach the water spray plate. Shower head.

4. The second flow path further includes an obstacle member that intentionally disturbs the water flow, the obstacle member being disposed upstream of the microbubble generating mechanism.

4. The showerhead of claim 3.

5. A filter member for removing chlorine from the water flow is further disposed in the first flow path. The showerhead according to claim 3 or 4.

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