Shower plate

Abstract

To provide a water spray plate for a shower capable of increasing the impact force of a water flow while suppressing the amount of shower water.SOLUTION: The water spray plate 1 includes a body 2, and a water spray hole group G formed by annularly arranging a plurality of water spray hole 3g. The outlet 32 of the nozzle hole 3g is disposed closer to the center O g of the nozzle hole group G than the inlet 31 of the nozzle hole 3g, and the area of the outlet 32 of the nozzle hole 3g is smaller than the area of the inlet of the nozzle hole 3g.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to shower spray plates. [Background technology]

[0002] Conventionally, technologies for shower spray plates that can improve cleaning effects and usability have been proposed. For example, Patent Document 1 introduces a shower spray plate that has many spray holes concentrated in the center to generate a jet of water. Patent Document 2 introduces a shower spray plate that has many spray holes in a thin metal plate to emit fine water streams. Patent Document 3 introduces a shower spray plate that has spray holes with a curved shape in the vertical cross section to improve usability. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-142272 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-104930 [Patent Document 3] Patent Publication No. 2021-145877 Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, in the showerhead market, there is a demand for showerheads that can reduce the amount of water used to improve water conservation, while increasing the impact of the water flow on the scalp and body surface, thereby improving the cleansing effect and comfort of the shower.

[0005] Therefore, an object of the present disclosure is to provide a shower spray plate that can increase the impact force of the water flow while reducing the amount of water used. [Means for solving the problem]

[0006] In order to solve the above problems, the shower spray plate of the present disclosure comprises a main body and a group of spray holes formed by arranging a plurality of spray holes in a ring shape on the main body, and the center of the group of spray holes is located at a position different from the center of the main body. [Effects of the Invention]

[0007] According to the shower spray plate of the present disclosure, a spray hole group is provided, which is made up of a plurality of spray holes arranged in a ring, and therefore the impact force of the water flow can be increased by the bundle of water flows that flow out from the spray hole group. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing a shower spray plate according to an embodiment of the present disclosure; [Figure 2] (a) rear view, (b) front view, and (c) cross-sectional view along line BB of the sprinkler hole group. [Figure 3] FIG. 10 is a perspective schematic view showing the water flowing out from the nozzle hole group. [Figure 4] (a) A schematic cross-sectional view taken along line AA showing the water flowing out of the nozzle hole group. (b) A schematic cross-sectional view taken along line AA showing the opening area of ​​the nozzle hole group and the water flowing out of nozzle holes with the same opening area. [Figure 5] 10A and 10B are schematic diagrams showing variations of the nozzle holes that make up the nozzle hole group. [Figure 6] 10A to 10C are schematic diagrams showing variations in the arrangement pattern of the nozzle hole groups. [Figure 7] FIG. 1 is a cross-sectional view of a shower head for explaining the principle of fine bubble generation. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, one embodiment of the present disclosure applied to a shower spray plate will be described with reference to the drawings. In the following description, the outlet 32 ​​side of the spray plate 1 will be referred to as the front, and the inlet 31 side will be referred to as the back.

[0010] As shown in Fig. 1, the sprinkler plate 1 is attached to the shower head 51. The sprinkler plate 1 includes a main body 2, water spray holes 3 arranged in the main body 2, and a water spray hole group G formed by arranging a plurality of water spray holes 3g in an annular shape. The water spray holes 3 include the water spray holes 3g constituting the water spray hole group G and individually provided cylindrical water spray holes 3i. The main body 2 is a plate-shaped member made of a metal material such as stainless steel. The area of the water spray hole 3g is 0.05 - 0.1 mm 2 and the area of the water spray hole 3i is 0.05 - 0.5 mm 2 and it can be set like this.

[0011] The center Og of the water spray hole group G (see Fig. 2) is arranged at a position different from the center Ob of the main body 2. The water spray holes 3g only need to be arranged in an annular shape around the center Og, and they may or may not be evenly arranged.

[0012] The water spray hole group G is arranged along concentric circles centered on the center Ob of the main body 2. By arranging it like this, in the whole sprinkler plate 1, the water spray hole group G with strong impact force and the water spray holes 3i with weak impact force are evenly arranged. Therefore, no matter in which direction the sprinkler plate 1 is attached to the shower head 51, the same water flow can be obtained.

[0013] As shown in Fig. 2, the water spray hole 3g has an inlet 31, an outlet 32, and a flow path 33 formed in a tapered shape that narrows from the inlet 31 to the outlet 32. The outlet 32 is arranged closer to the center Og of the water spray hole group G than the inlet 31.

[0014] As shown in Fig. 2(a), the inlet 31 is formed in a fan shape whose width widens from the center to the edge of the water spray hole group G. As shown in Fig. 2(b), the outlet 32 is formed in an elliptical shape that is slightly flattened (d2 < d1) in the circumferential direction of the water spray hole group G. By configuring it like this, a water flow inclined toward the center Og of the water spray hole group G can be made to flow out.

[0015] Next, the operation of the sprinkler plate 1 configured as described above will be described according to Figs. 3 and 4.

[0016] 3, the central axis of each of the multiple nozzle holes 3g is inclined toward the center Og of the nozzle hole group G, and is configured to intersect in front of the shower head 51. As a result, the direction of each water flow that passes through the multiple nozzle holes 3g is adjusted so that it is directed toward the center Og of the nozzle hole group G. Therefore, the water flows that flow out from the multiple nozzle holes 3g included in the same nozzle hole group G join in front of the shower head 51 to form a bundle of water flows F.

[0017] FIG. 4(a) is a schematic diagram of a water flow flux F flowing out from a nozzle hole 3g that constitutes nozzle hole group G. FIG. 4(b) is a schematic diagram of a water flow F' flowing out from a nozzle hole 3' that has the same opening area as the opening area of ​​nozzle hole group G. The "opening area of ​​nozzle hole group G" is the sum of the opening areas of the nozzle holes 3g that constitute nozzle hole group G.

[0018] Table 1 shows the results of a comparison of the flow velocity of the outflowing water between (item 1) spray hole group G and (item 2) spray hole 3' with the same opening area as spray hole group G. The number of spray holes 3g that make up spray hole group G is six. The amount of water used is 10 L / min. The flow velocity can be calculated or measured using particle image velocimetry (PIV).

[0019] [Table 1]

[0020] Table 2 shows the results of a comparison of the flow rate of the outflowing water between (Item 1) a sprinkler plate 1 provided with sprinkler hole groups G and sprinkler holes 3 as in the present disclosure and (Item 2) a sprinkler plate (not shown) provided with only sprinkler holes 3 as in the prior art. The amount of water used is 10 (L / min) and 6 (L / min), a 40% reduction from 10 (L / min). The total number of sprinkler hole groups G and sprinkler holes 3 in (Item 1) and the total number of sprinkler holes 3 in (Item 2) are the same (100).

[0021] [Table 2]

[0022] Here, we will explain impact force. Impact force is expressed as "impact force (N) = mass (kg) x (speed just before collision (m / s) - speed after collision (m / s)) / collision time (s)". In other words, impact force is proportional to mass and also proportional to flow velocity. Collision time indicates the time it takes for the shower water flow F to hit the skin and lose momentum, and is generally 0.1 x 10 -3 It takes about a second.

[0023] The impact force should be such that the water jet blows through the hair and hits the scalp with a stimulating force. This is the same impact force (10N or more) as when a shower jet of water is sprayed directly upward (vertically) with a dynamic water pressure of 0.1 MPa, shooting water up more than 1.8 m. Impact force can be calculated using a high-speed camera.

[0024] As shown in Table 1, the mass of the water flow in (Item 1) and (Item 2) is the same, but the flow velocity in (Item 1) is about twice as fast as the flow velocity in (Item 2). As mentioned above, the faster the water flow velocity, the greater the impact force, so it can be seen that the impact force is greater when the nozzle hole group G is used.

[0025] As shown in Table 2, the mass of the water flow in (Item No. 1) and (Item No. 2) is the same, but the flow velocity of the nozzle hole group G in (Item No. 1) is about twice as fast as the flow velocity in (Item No. 2). As mentioned above, the faster the water flow velocity, the greater the impact force, so the spray plate 1 of the present disclosure can generate a greater impact force across the entire shower head 51 than conventional spray plates.

[0026] As shown in the shaded area in Table 2, the flow velocity (4.04 m / s) of the sprinkler hole group G at a flow rate of 6 L / min (item 1) is equal to or greater than the flow velocity (3.93 m / s) at a flow rate of 10 L / min (item 2) (item 2). Because the water flow velocity and the strength of the impact force are proportional, even when using the sprinkler plate 1 of the present disclosure and saving 40% of water, an impact force equal to or greater than that of a conventional sprinkler plate without saving water can be obtained.

[0027] According to the sprinkler plate 1 configured as described above, by providing a group of sprinkler holes G, the amount of water used can be reduced, improving the water-saving effect, while increasing the impact force of the water flow on the scalp and body surface, thereby improving the cleaning effect and comfort of the shower.

[0028] The present disclosure is not limited to the above-described embodiments, and for example, as shown in Figures 5 and 6, it is possible to appropriately change the number of spray holes 3g and the arrangement pattern of the spray hole groups G, and to appropriately change the shape and configuration of each part within the scope of the present disclosure.

[0029] 5, the number of nozzle holes 3g that make up the nozzle hole group G can be, for example, 3 to 6. In order to obtain the desired impact force, it is preferable that the number of nozzle holes 3g included in the nozzle hole group G be 3 or more.

[0030] As shown in Figure 6, the group of water spray holes G can be arranged concentrically from the center Ob of the main body 2, for example, in the second row (Figure 6(a)), the second and third rows (Figure 6(b)), the second to fourth rows (Figure 6(c)), or the first to fourth rows (Figure 6(d)). It is also possible to arrange the group of water spray holes G concentrically from the center Ob of the main body 2, in the second and fourth rows (Figure 6(e)), or the first and third rows (Figure 6(f)), alternating with the water spray holes 3i.

[0031] The present disclosure can also be used as the spray plate 1 of a shower head 51 that generates fine bubbles. Fine bubbles include microbubbles and ultrafine bubbles. In particular, ultrafine bubbles, also known as nanobubbles, are tiny bubbles less than 1 μm in size. Fine bubbles are said to have high cleaning, moisturizing, and heat-retaining effects.

[0032] As shown in Figure 7, the principle behind the generation of fine bubbles is to provide a small-diameter section (throat section 53) in the flow path 52 inside the shower head 51, and the pressure difference in the water flow as it passes through the throat section 53 causes cavitation, generating bubbles on the downstream side 53a of the throat section. The greater the pressure loss in the throat section, the more fine bubbles can be generated. In the example in Figure 7, a swirling member 54 is provided to generate a swirling flow in order to generate finer fine bubbles.

[0033] However, increasing the pressure loss at the throat requires a certain degree of water flow restriction. While this is desirable from the perspective of water conservation, a decrease in water flow rate results in a decrease in flow velocity, which can reduce the impact force of the water flow. Furthermore, according to the principles of fine bubble generation, it is not possible to provide a section downstream of the throat that is smaller in diameter than the throat, so the opening area of ​​the spray holes 3 must be larger than that of the throat. Even in such cases, by arranging the spray hole group G and merging the water flows, it is possible to ensure an appropriate impact force. [Explanation of symbols]

[0034] 1 Sprinkler plate 2 Main unit 3 Sprinkler holes 31 Inlet 32 Outlet 33 Flow path 51 shower head G. Watering holes Ob Body Center Og Center of the sprinkler holes F. Flowing Water

Claims

1. a main body; and a group of spray holes formed by arranging a plurality of spray holes in an annular shape on the main body; A shower spray plate, wherein the centers of the spray holes are arranged at positions different from the center of the main body.

2. The shower spray plate according to claim 1 , wherein the outlets of the spray holes are positioned closer to the center of the group of spray holes than the inlets of the spray holes.

3. The shower spray plate according to claim 1 , wherein an area of ​​the outlet of the spray hole is smaller than an area of ​​the inlet of the spray hole.

4. The shower spray plate according to claim 1 , wherein the spray holes include flow paths formed in a tapered shape that narrows from an inlet toward an outlet.

5. 2. The shower spray plate according to claim 1, wherein the inlet of each of the spray holes is formed in a fan shape whose width increases from the center of the group of spray holes toward the edge.

6. The shower spray plate according to claim 1 , wherein the outlets of the spray holes are formed in an elliptical shape that is flattened in the circumferential direction of the group of spray holes.

7. A plurality of the spray hole groups are provided, The shower spray plate according to claim 1 , wherein the plurality of groups of spray holes are arranged along concentric circles centered on the center of the main body.

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