JP6339466B2 - Water discharge device - Google Patents

Description

  The present invention relates to a water discharge device that discharges foam water.

  In kitchens and washrooms, water discharge devices such as faucets are usually installed. If the water flow of the water discharge discharged from the water discharge device is strong, water splash may occur when the water reaches the bottom surface of the sink. As a countermeasure, there has been proposed a water discharge device that discharges water in which bubbles are mixed (hereinafter referred to as foam water) (see Patent Document 1). Since the foamed water contains bubbles, the contact with the sink or the like becomes soft and water splash is effectively suppressed. In addition to this, it is possible to increase the apparent volume while suppressing the water discharge amount.

JP 2011-11101 A

  By the way, when foam water lands on the bottom surface of the sink or the like, some sound is generated at the landing position. The present inventor examined this cause and found that it was caused by bubbles originally contained in the foam water. When the foam water collides with the landing position, the bubbles contained in the foam water burst due to the impact, and a burst sound is generated. In order to give the user a more comfortable feeling of use, it is desirable that the plosive sound generated at the landing position can be suppressed. In order to achieve this object, the present inventor has recognized that there is room for improvement in the conventional water discharge device.

  This invention is made | formed in view of such a subject, The objective is to provide the water discharging apparatus which can suppress the burst sound of the bubble produced in the landing position of foam water.

In order to solve the above-described problems, a water discharge device according to an aspect of the present invention includes an inflow portion into which water flows in from an upstream side, and a foam spout portion that mixes air into water flowing out from the inflow portion and discharges it as foam water And a rectifying and discharging part that discharges water flowing out from the inflow part as rectified water. It is.
According to this aspect, when the rectified water lands on the water discharge target such as the bottom surface of the sink, the water film is formed so as to spread from the landing position, and the foamed water lands on the water film. As a result, the water film functions as a buffer, the impact when the foam water arrives is mitigated by the water film, the bursting of bubbles contained in the foam water is suppressed, and the burst of bubbles occurring at the landing position of the foam water The sound can be suppressed.

Moreover, in the above-mentioned aspect, the 1st discharge port of the foam spouting part which discharges foam water may be arrange | positioned so that the 2nd discharge port of the rectification water discharge part which discharges rectified water may be surrounded.
According to this aspect, the foam water that covers the rectified water discharged from the rectified water discharge section can be discharged from the foam water discharge section. Therefore, it becomes difficult to visually recognize the rectified water by the foam water, and even when the rectified water is discharged separately from the foam water, the influence of the rectified water on the appearance of the entire discharged water flow can be suppressed.

Moreover, in the above-mentioned aspect, the foam water spouting part has a first introduction hole through which water flows out from the inflow part, and the rectifying water spouting part has a second introduction hole through which water flows out from the inflow part, The inlet of the hole may be formed so that the ratio of the channel cross-sectional area to the inlet of the first introduction hole is 0.8 or more and 1.5 or less.
According to this aspect, since the ratio of the channel cross-sectional area is 0.8 or more, the thickness of the water film formed by the rectified water can be stably increased, and the burst sound of bubbles can be stably suppressed. Moreover, since the ratio of the channel cross-sectional area is 1.5 or less, a reduction in the amount of bubbles contained in the foam water can be suppressed, and the feeling of use of the foam water can be maintained.

Further, in the above-described aspect, the rectifying water discharge portion includes a small inner diameter portion provided in a water channel through which water flowing out from the inflow portion flows, and a large inner diameter portion provided downstream from the small inner diameter portion in the water channel. Also good.
According to this aspect, when the water flow flows from the small inner diameter portion to the large inner diameter portion, the water flow becomes thick and the flow velocity becomes slow. As a result, the impact at the time of landing of the rectified water is reduced, the rectified water is easily diffused so as to spread without splashing from the landing point, and a thick water film is formed around the landing position. It becomes easy to be done. Thereby, the buffer effect by a water film is heightened and it becomes easy to suppress the burst sound of a bubble significantly.

Moreover, in the above-mentioned aspect, a large internal diameter part may be formed in the taper shape which diameter-expands as it goes downstream.
According to this aspect, when a water flow flows from the small inner diameter portion to the large inner diameter portion, the water flow is stably thickened by the Coanda effect, and the flow velocity is easily reduced.

  According to the present invention, it is possible to suppress the burst sound of bubbles generated at the landing position of foam water.

It is a side view which shows the watering device with which the water discharging apparatus which concerns on embodiment is used. It is an expanded sectional view showing the water discharging unit concerning an embodiment. Fig.3 (a) is the perspective view which looked at the water discharging apparatus which concerns on embodiment from diagonally upward, FIG.3 (b) is the perspective view which looked at the water discharging apparatus from diagonally below. Fig.4 (a) is a bottom view of the water discharging apparatus which concerns on embodiment, FIG.4 (b) It is a top view of the water discharging apparatus which concerns on embodiment. FIG. 6A is a diagram schematically showing a state when the foam water and the rectified water have landed on the water discharge target, and FIG. 6B is a case where the flow velocity of the rectified water discharged from the second discharge port is high. It is a figure which shows the state of.

  This inventor examined the improvement measure for suppressing the plosive sound produced in the landing position of foam water. As a result, it was found that the rectified water was discharged simultaneously with the foamed water, a water film was formed around the landing position by the rectified water, and the foamed water was landed on the water film, thereby obtaining a silent effect. Thereby, a water film functions as a buffer, the impact when foam water lands is mitigated by the water film, and the burst sound is effectively suppressed by suppressing the burst of bubbles.

  Hereinafter, embodiments of the present invention conceived based on the contents of this study will be described with reference to the drawings. In the drawings, some components are omitted as appropriate for the sake of simplicity.

FIG. 1 is a side view showing a faucet 10 in which a water discharge device 28 according to this embodiment is used.
The faucet 10 includes a main body 14 installed on the upper surface 12 of the sink, and a water discharge pipe 16 extending from the main body 14. A water supply path 18 is formed in the water discharge pipe 16. A cylindrical attached portion 20 that protrudes downward is provided at the tip of the water discharge pipe 16, and a water discharge unit 22 is detachably attached to the attached portion 20 with a screw or the like. A water passage hole 24 extending downward is formed inside the attached portion 20. The water passage hole 24 constitutes a part of the water supply path 18.

FIG. 2 is an enlarged cross-sectional view showing the water discharge unit 22.
The water discharge unit 22 includes a cylindrical housing 26 that is detachably attached to the attached portion 20, and a water discharge device 28 that is disposed inside the housing 26. A stepped hole 30 is formed inside the housing 26. The water discharge device 28 is formed in a cylindrical shape extending in the vertical direction, and each part such as an inflow portion 38, a foam water discharge portion 44, and a rectifying water discharge portion 46, which will be described later, is configured by integral molding using a resin or the like as a material.

FIG. 3A is a perspective view of the water discharge device 28 as viewed from obliquely above, and FIG. 3B is a perspective view of the water discharge device 28 as viewed from obliquely below.
In the water discharge device 28, an annular engagement portion 32 that projects radially outward is formed on the outer peripheral portion on the base end side. As shown in FIG. 2, the water discharge device 28 is held in the housing 26 by the engagement of the step portion 34 of the stepped hole 30 and the engagement portion 32. An annular seal member 27 is interposed between the engaging portion 32 and the tip end surface of the attached portion 20, and the space between them is sealed.

  Returning to FIG. 3, a plurality of positioning portions 36 are formed in the circumferential direction on the outer peripheral portion on the proximal end side of the water discharge device 28. The positioning part 36 is constituted by a convex part protruding from the outer peripheral part of the water discharging device 28. As shown in FIG. 2, the water discharge device 28 has a radial position in the stepped hole 30 determined by the engagement between each positioning portion 36 and the inner peripheral surface of the stepped hole 30.

  As shown in FIG. 2, the water discharge device 28 has an inflow portion 38 formed at a base end portion that is a portion near the water supply path 18 of the water discharge pipe 16. An inflow path 40 communicating with the water supply path 18 of the water discharge pipe 16 is formed in the inflow section 38, and water flows into the inflow path 40 from the upstream water supply path 18 through the inlet 42.

  The water discharge device 28 includes a foam water discharge unit 44 and a rectifying water discharge unit 46 formed on the downstream side of the inflow path 40. The foam spouting unit 44 includes a first water channel 48 that branches from the inflow channel 40 and a first discharge port 50 that is provided at the downstream end of the first water channel 48. The rectifying and discharging unit 46 includes a second water channel 52 that branches from the inflow channel 40 and a second discharge port 54 that is provided at the downstream end of the second water channel 52.

  In the inflow portion 38, when water flows in from the water supply channel 18, the water flows out to the first water channel 48 and the second water channel 52 on the downstream side. The foam water discharger 44 discharges water flowing out from the inflow part 38 from the first discharge port 50 as foam water 56, as will be described later. As will be described later, the rectifying water discharge portion 46 discharges water flowing out from the inflow portion 38 from the second discharge port 54 as rectifying water 58 for forming a water film at the landing position.

  The inflow portion 38 includes a first partition body 60 provided at the downstream end of the inflow passage 40. The first partition wall 60 is provided so as to separate a part of the inflow channel 40 and the first water channel 48. The foam water spouting unit 44 includes a decompression unit 62 configured by a part of the first partition wall 60. The decompression part 62 has a plurality of first introduction holes 64 through which water flows out from the inflow part 38. Each first introduction hole 64 constitutes a part of the first water channel 48. In the decompression part 62, the water flowing out from the inflow part 38 is decompressed by passing through the first introduction hole 64, and is ejected as a high-speed water stream. Each of the first introduction holes 64 is formed in a tapered shape so as to be tapered toward the downstream side in order to make it easy to eject a high-speed water flow.

  The foam spouting unit 44 has an air mixing unit 66 provided on the downstream side of the plurality of first introduction holes 64 in the first water channel 48. The air mixing unit 66 includes an introduction path 68 through which water flowing out from the inflow portion 38 through the first introduction hole 64 enters, and an air hole 70 formed in the outer peripheral portion of the water discharge device 28. The introduction channel 68 constitutes a part of the first water channel 48, and the air hole 70 is formed in the first water channel 48. As shown in FIG. 3, a plurality of air holes 70 are formed at the outer peripheral portion of the water discharge device 28 so as to extend along the circumferential direction.

  Here, as shown in FIG. 2, the water discharge unit 22 includes an outer cylinder part 26 a that is provided on the outer peripheral part of the water discharge apparatus 28 at a distance radially outward, and between the outer cylinder part 26 a and the water discharge apparatus 28. And an air passage 29 formed on the surface. The air hole 70 of the water discharge device 28 communicates with the external space 72 through the air passage 29.

  In the air mixing section 66, when a high-speed water flow enters the introduction path 68 from the decompression section 62, a negative pressure is generated in the introduction path 68. Due to this negative pressure, the air in the external space 72 is taken into the introduction passage 68 from the air hole 70 through the air passage 29. In this figure, the air flow is indicated by an arrow Q. The taken-in air is mixed so as to be involved in the water flow, and a water flow containing bubbles is generated.

  The foam spouting unit 44 includes a diffusion unit 74 provided on the downstream side of the air mixing unit 66 in the first water channel 48. The diffusion part 74 has a plurality of shielding walls 76 that are arranged so as to block the flow of water flow ejected from the plurality of first introduction holes 64. The plurality of shielding walls 76 are formed to extend in a first direction A that intersects the direction of water flow through the first water channel 48. The plurality of shielding walls 76 are arranged in a row at intervals in the water flow direction of the first water channel 48 and in the second direction B intersecting the first direction A, and constitute a row of shielding walls 78. The shielding wall group 78 is arranged in a plurality of rows at intervals in the water flow direction. In this figure, each shielding wall 76 which comprises the one shielding wall group 78 is enclosed and shown with a dashed-dotted line. In the shielding wall groups 78 adjacent to each other in the water flow direction, the shielding walls 76 constituting the downstream shielding wall group 78 are arranged between the shielding walls 76 constituting the upstream shielding wall group 78 of the first water channel 48. Is done. That is, the shielding wall groups 78 adjacent in the water flow direction are arranged in a staggered manner. Clearance spaces 81 are formed on both sides of each shielding wall 76 in the second direction B. The gap space 81 constitutes a part of the first water channel 48.

  In the diffusion part 74, the water flow flowing along the direction of the water flow in the first water channel 48 hits each shielding wall 76, and the water flow diffuses and then flows downstream. At this time, the water flow is diffused to reduce the size of the water particles, whereby the air taken in from the air holes 70 can be easily caught in the water flow, and the amount of bubbles contained in the water flow can be increased.

  The foam spouting unit 44 includes a rectifying unit 80 provided on the downstream side of the diffusion unit 74 in the first water channel 48. FIG. 4A is a bottom view of the water discharge device 28. The rectifying unit 80 includes a plurality of annular ribs 82 disposed in the first water channel 48 and a plurality of radial ribs 84 connected between the plurality of annular ribs 82. The annular ribs 82 are provided concentrically at intervals in the radial direction around the second discharge port 54. The plurality of radial ribs 84 are formed so as to extend radially around the second discharge port 54, and are provided at equal intervals in the circumferential direction on both radial sides of the annular rib 82.

  In the rectifying unit 80, as shown in FIG. 2, the inner wall surfaces of the ribs 82 and 84 are formed to extend along the same direction. In the rectifying unit 80, the downstream portion of the first water channel 48 is partitioned by the ribs 82 and 84, and a plurality of rectifying channels 86 are provided. A plurality of outlets 88 are provided at the downstream end of each rectifying path 86. The plurality of outlets 88 constitute the first discharge port 50.

  As shown in FIG. 4A, the plurality of rectifying paths 86 are arranged in a row at intervals in the circumferential direction around the second discharge port 54 and are concentric with intervals in the radial direction. A plurality of columns are provided. The first discharge port 50 constituted by the outlets 88 of the plurality of rectifying paths 86 is arranged so as to surround the second discharge port 54. FIG. 4B schematically shows a cross-sectional view of the foam water 56 and the rectified water 58 discharged from the first discharge port 50 and the second discharge port 54. With the above configuration, the foam water 56 is discharged from the first discharge port 50 so as to cover the rectified water 58 discharged from the second discharge port 54 from the outside of the water flow direction axis.

  In the rectifying unit 80, as shown in FIG. 2, the water flow including bubbles flowing in the first water channel 48 is rectified by passing through each rectifying channel 86, and the central axis L1 of each rectifying channel 86 from the first discharge port 50. It becomes easy to discharge the foamed water 56 in the direction along the line. Thereby, it becomes difficult to mix the foam water 56 and the rectification water 58, and mixing of the bubble to the rectification water 58 by these mixing is suppressed.

  The rectifying water discharger 46 has a second introduction hole 92 formed in the first partition wall 60. Water flows out from the inflow portion 38 into the second introduction hole 92. The second water channel 52 is formed in the second introduction hole 92. The rectifying and discharging unit 46 includes a second partition body 94 that defines the second water channel 52. The second partition wall 94 is provided so as to separate the second water channel 52 of the rectifying water discharging unit 46 and the first water channel 48 of the foam water discharging unit 44. The second partition wall 94 is formed in a cylindrical shape, and the first water channel 48 is provided so as to surround the second water channel 52 outside the second partition wall 94.

  The second introduction hole 92 has a small inner diameter portion 96 provided in the middle of the second water passage 52 in the water flow direction, and a large inner diameter portion 98 provided on the downstream side of the small inner diameter portion 96. The small inner diameter portion 96 is provided from the entrance of the second introduction hole 92 to an intermediate position in the water flow direction, and is formed to have the same inner diameter along the water flow direction. The large inner diameter portion 98 is provided at a position near the downstream end in the second water channel 52. The large inner diameter portion 98 has a channel cross-sectional area larger than that of the large inner diameter portion 98, and is formed in a tapered shape that increases in diameter toward the downstream side. The large inner diameter portion 98 extends to the downstream end of the second water passage 52, and the second discharge port 54 is formed by the opening end on the downstream side of the large inner diameter portion 98. The second outlet 54 is provided so as to be flush with the first outlet 50 of the foam spouting unit 44.

FIG. 5 is a plan view of the water discharge device 28.
The inlets 64a of the plurality of first introduction holes 64 and the inlets 92a of the second introduction holes 92 are formed in a circular shape. The inlet 64 a of each first introduction hole 64 is formed on the surface of the first partition wall 60 so as to surround the inlet 92 a of the second introduction hole 92. As shown in FIG. 2, the inlet 64 a of each first introduction hole 64 and the inlet 92 a of the second introduction hole 92 are provided so as to be flush with each other on the surface of the decompression unit 62.

The effect of the above water discharging apparatus 28 is demonstrated.
The foam spouting unit 44 mixes the air taken in from the air holes 70 into the water flowing out from the inflow unit 38 to generate a water flow including bubbles, and discharges the water from the first discharge port 50 as the foam water 56. In the rectifying water discharge section 46, no air hole is formed in the second water channel 52 from the inlet to the outlet, and the water flow flowing through the second water channel 52 is in contact with the atmosphere in the range from the inlet to the outlet of the second water channel 52. do not do. The air hole here is provided to take in air in the external space. This rectification water discharge part 46 discharges from the 2nd discharge port 54 as the rectified rectification water 58, without mixing the air taken in from the air hole into the water which flows out out of the inflow part 38. FIG. In the above water discharge device 28, when water flows into the inflow portion 38, the rectified water 58 is discharged from the rectified water discharge portion 46 at the same time as the rectified water 58 is discharged from the foam water discharge portion 44.

FIG. 6A is a diagram schematically illustrating a state when the foam water 56 and the rectified water 58 land on the water discharge target 104.
The rectified water 58 forms a water film 106 so as to spread from the landing position when it reaches the water discharge target 104 such as the bottom of the sink or tableware. When the foam water 56 tries to land on the water discharge target 104, the foam water 56 does not directly land on the water discharge target 104, but does land on the water film 106 formed by the rectified water 58. As a result, the water film 106 functions as a buffer, and the impact when the foam water 56 lands is mitigated by the water film 106, and the burst of bubbles contained in the foam water 56 can be suppressed, and the foam water 56 can land. The popping sound of bubbles generated at the position can be suppressed.

  The first discharge port 50 of the foam water discharge unit 44 is disposed so as to surround the second discharge port 54 of the rectifying water discharge unit 46. As a result, as shown in FIG. 4B, the foam water 56 that covers the rectified water 58 discharged from the rectified water discharge section 46 from the outside of the water flow direction axis can be discharged from the foam water discharge section 44. Therefore, it becomes difficult to visually recognize the rectified water 58 by the foam water 56, and even when the rectified water 58 is discharged separately from the foam water 56, the influence of the rectified water 58 on the appearance of the entire discharged water flow can be suppressed.

FIG. 6B is a diagram schematically showing a state when the flow velocity of the rectified water 58 discharged from the second discharge port 54 is high.
If the flow velocity of the rectifying water 58 discharged from the second discharge port 54 is high, the impact upon landing of the rectifying water 58 is increased, causing water splash 108 and reducing the thickness of the water film 106.

  In this respect, in the present embodiment, the rectifying water discharge portion 46 has the small inner diameter portion 96 and the large inner diameter portion 98 in the second water channel 52, and therefore when the water flow flows from the small inner diameter portion 96 to the large inner diameter portion 98, the water flow is thick. As a result, the flow velocity becomes slower, and the flow velocity at the time of landing of the rectified water 58 also becomes slower. As a result, the impact at the time of landing of the rectified water 58 is reduced, and the rectified water 58 is easily diffused so as to spread outside without splashing from the landing position, and there is a thickness around the landing position. The water film 106 is easily formed. Thereby, the buffer effect by the water film 106 is enhanced, and it becomes easy to greatly suppress the burst sound of bubbles. Further, since the impact at the time of landing of the rectified water 58 is reduced, the water film 106 can be formed while suppressing the impact sound at the time of landing of the rectified water 58, and the water film 106 is generated from each foam water 56 and the rectified water 58. Sound can be suppressed effectively. Here, the “buffering effect” refers to an effect of mitigating the impact when the foamed water 56 lands.

  In particular, since the large inner diameter portion 98 of the rectifying water discharge portion 46 is formed in a taper shape, when the water flow flows from the small inner diameter portion 96 to the large inner diameter portion 98, the water flow is stably thickened by the Coanda effect and the flow velocity is decreased. It becomes easy to do. As a result, the flow velocity at the time of landing of the rectifying water 58 can be stably reduced, and the above-described buffer effect and the effect of suppressing the impact sound at the time of landing of the rectifying water 58 can be obtained stably.

  Further, the foam water spouting portion 44 has a diffusing portion 74 that diffuses when the water flow sent out from the inflow portion 38 and each shielding wall 76 hit each other. Therefore, in the first water channel 48, the water flow strikes the respective shielding walls 76, so that the water flow temporarily stays and then flows downstream. On the other hand, in the second water channel 52, the water flow does not stay and flows downstream. For this reason, it becomes easier to discharge the rectified water 58 from the rectifying water discharging unit 46 before the foam water discharging unit 44 discharges the water after starting to feed water into the inflow unit 38, and before the foam water 56. It becomes easy to make the rectified water 58 land on the water. As a result, the water film 106 can be formed at an early stage by the rectified water 58 after the water is sent out to the inflow portion 38, and the buffer effect by the water film 106 can be easily obtained at an early stage.

  In addition, as shown in FIG. 5, each 1st introduction hole 64 is formed so that the flow-path cross-sectional area of the inlet 64a may become the same. Here, “to be the same” includes not only the case where the flow path cross-sectional areas of the inlets 64a of the first introduction holes 64 are completely the same, but also the case where they are substantially the same. As a result, when water flows into the inflow portion 38, the water having a uniform water flow easily flows out to each of the first introduction holes 64, and is stably discharged over a wide range in the downstream introduction passage 68. It becomes easy to generate pressure. As a result, it becomes easy to generate a water flow containing bubbles stably over a wide range in the first water channel 48.

  In addition, the inlet 92a of the second introduction hole 92 has a ratio of a channel cross-sectional area (hereinafter referred to as a cross-sectional area ratio) with respect to the inlet 64a of the first introduction hole 64 of 0.8 to 1.5. It is formed. This cross-sectional area ratio was set based on the result of an experimental examination described later. Here, the “flow passage cross-sectional area of the inlet 64a of the first introduction hole 64” refers to an average value of the flow passage cross-sectional areas of the inlets 64a of the first introduction holes 64. When the cross-sectional area ratio is 0.8 or more, the thickness of the water film 106 formed by the rectifying water 58 can be stably increased, and the burst sound of bubbles can be stably suppressed. In addition, when the cross-sectional area ratio is 1.5 or less, a decrease in the amount of bubbles contained in the foam water 56 can be suppressed, and even when the rectified water 58 is discharged in addition to the foam water 56, the feeling of use of the foam water 56 is improved. Can be maintained. Even when the cross-sectional area ratios are substantially the same, these effects can be obtained similarly.

  The experimental contents that serve as the basis for setting the cross-sectional area ratio will be described. In this experiment, using the water discharge device 28 shown in FIG. 2 to FIG. 5, for the inlet 92 a of the second introduction hole 92, under various conditions of changing the cross-sectional area ratio of the first introduction hole 64 to the inlet 64 a, The water discharge state and the silent effect were evaluated. Table 1 below shows the test results. The inlet 64a of each first introduction hole 64 has a diameter of 1.2 mm so that the average value of the flow path cross-sectional area is 1.2 mm. In evaluating the water discharge state and the silent state, the result of comparison with the foam water as a reference example is shown. The foam water in the reference example herein refers to foam water discharged from the first discharge port 50 when the water discharge device 28 provided with only the foam water discharge portion 44 without using the rectifying water discharge portion 46 is used.

  The “water discharge state” in Table 1 indicates the result of visually determining whether or not there is a change from the foam water in the reference example for the foam water 56 discharged from the foam water discharge unit 44. When the degree of white turbidity did not change compared to the foamed water of the reference example, it was evaluated as “◯”, when the degree of white turbidity was decreased, “△”, and when white turbidity was not observed, “x”. The “silent effect” indicates a result of determining how the sound level of the discharged water flow discharged from the water discharging device 28 is changed as compared with the foam water of the reference example. Compared with the foamed water of the reference example, “◯” when a decrease of 10 dBA or more is observed, “△” when a decrease of 1 to 10 dBA is observed, “X” when a sound similar to the reference example is generated. It was evaluated.

  As shown in Table 1, when the cross-sectional area ratio is more than 1.5, the degree of cloudiness of the foam water decreases. This means that the amount of bubbles contained in the foam water 56 is reduced. This is considered to be due to the following reason. That is, when the cross-sectional area ratio is too large, a large amount of water easily flows out from the inflow portion 38 into the rectifying water discharge portion 46, and a sufficient amount of water hardly flows out from the inflow portion 38 into the foam water discharge portion 44. As a result, the amount of water entering the air mixing unit 66 is likely to be insufficient, a negative pressure is less likely to be generated in the introduction path 68, and a sufficient amount of air is difficult to be taken in from the air holes 70. Thereby, the amount of bubbles contained in the foam water 56 is likely to be reduced, and the feeling of use of the foam water 56 is likely to be impaired.

  When the cross-sectional area ratio was 0.8 or more, a considerable silent effect was obtained. This is considered to be due to the following reason. That is, if the cross-sectional area ratio is large to some extent, a sufficient amount of water easily flows out from the inflow portion 38 into the rectifying water discharge portion 46, and the thickness of the water film 106 formed when the rectifying water 58 is landed is easily increased. . As a result, it is considered that the above-described buffering effect can be obtained stably and the bursting sound of bubbles can be stably suppressed.

  As mentioned above, although this invention was demonstrated based on embodiment, embodiment only shows the principle and application of this invention. In the embodiment, many modifications and arrangements can be made without departing from the spirit of the present invention defined in the claims.

  Although the water discharging apparatus 28 demonstrated the example used for the faucet 10, you may be used for the other water implements of the faucet 10. Even in this case, the water discharge unit 22 including the water discharge device 28 may be attached to the water discharge pipe 16 extending from the main body of the watering device. In the water discharge device 28, the inflow portion 38, the foam water discharge portion 44, and the rectifying water discharge portion 46 are configured by integral molding using a resin or the like as a raw material, but these may be configured by separate parts.

  The shape of the foam spouting part 44 is not particularly limited as long as air is mixed into the water flowing out from the inflow part 38 and discharged from the first discharge port 50 as the foamed water 56. For example, the foam spouting unit 44 may not include the diffusion unit 74 and the rectifying unit 80 described above.

  The shape of the rectifying water discharge portion 46 is not particularly limited as long as the water flowing out from the inflow portion 38 can be discharged from the second discharge port 54 as the rectified water 58. For example, the rectifying water discharge portion 46 may not have the large inner diameter portion 98 described above.

  The water discharge device 28 is configured to discharge the foam water 56 from the foam water discharge portion 44 and simultaneously discharge the rectified water 58 from the rectification water discharge portion 46 when flowing into the inflow portion 38. In addition to this, a switching mechanism for switching the presence or absence of discharge from each of the foam water discharge unit 44 and the rectification water discharge unit 46 is provided, and only one of the state in which the foam water 56 and the rectification water 58 are discharged simultaneously is discharged. The state may be switched.

DESCRIPTION OF SYMBOLS 28 ... Water discharging apparatus, 38 ... Inflow part, 40 ... Inflow channel, 44 ... Foam water discharging part, 46 ... Rectification water discharging part, 48 ... 1st water channel, 52 ... 2nd water channel, 56 ... Foam water, 58 ... Rectification water, 64 ... 1st introduction hole, 64a ... Inlet, 70 ... Air hole, 92 ... 2nd introduction hole, 92a ... Inlet, 96 ... Small inside diameter part, 98 ... Large inside diameter part.

Claims (4)

An inflow part into which water flows from the upstream side;
Foam water spouting part that mixes air into water flowing out from the inflow part and spouts as foam water;
A rectifying and discharging part that discharges water flowing out from the inflow part as rectified water,
When said water flows into the inlet portion, and at the same time spit foam water from the foam water discharger, Ri can der expectorating the rectified water from said rectifying water discharger,
The foam water spouting portion has a first introduction hole through which water flows out from the inflow portion,
The rectifying water discharge part has a second introduction hole through which water flows out from the inflow part,
The water inlet apparatus, wherein the inlet of the second introduction hole is formed so that a ratio of a channel cross-sectional area to the inlet of the first introduction hole is 0.8 or more and 1.5 or less .   2. The water discharge device according to claim 1, wherein the first discharge port of the foam water discharge unit that discharges the foam water is disposed so as to surround the second discharge port of the rectification water discharge unit that discharges the rectified water. . The rectifying water discharge part has a small inner diameter part provided in a water channel through which water flowing out from the inflow part flows, and a large inner diameter part provided downstream from the small inner diameter part in the water channel,
The second discharge port of the rectifying water discharge portion for discharging the commutation water, according to claim 1 or 2, characterized in Rukoto provided such that the first discharge port and flush the foam water discharge portion for discharging the foam water The water discharging apparatus described in 1. The water discharging apparatus according to claim 3 , wherein the large inner diameter portion is formed in a taper shape with a diameter increasing toward a downstream side.

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