JP2015194038A - water discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water discharge device capable of discharging bubble entrained water without reducing a volume of entrained bubbles by preventing decline in a flow rate inside a device even when a common inflow port is used for discharging both shower water and a stream of water.SOLUTION: A discharge port cap 1 has: a stream water discharge port 21 which discharges a single stream of bubble entrained water; a shower water discharge port 22 which is arranged at a periphery of the stream water discharge port 21 and discharges the bubble entrained water in the form of a shower; a stream water channel 23 flowing the bubble entrained water from an inflow port 11 to the stream water discharge port 21; and a shower water channel 24 flowing the bubble entrained water from the inflow port 11 to the shower water discharge port 22. The discharge port cap 1 can be switched between a first state where air supplied through the shower water channel is mixed into water flowing in the stream water channel and a second state where the air supplied through the stream water channel is mixed into the water flowing in the shower water channel.

Description

  The present invention relates to a water discharge device capable of discharging air-bubble mixed water.

  2. Description of the Related Art Conventionally, as a water discharge device, a device that mixes bubbles in discharged water and discharges the bubble-containing water has been proposed (see, for example, Patent Documents 1 and 2).

  Patent Document 1 below proposes a water discharge device that can switch between shower water discharge for discharging shower-like water and rectified water discharge for discharging a single stream of water. This water discharger discharges bubbles mixed water from any water discharge port, thereby discharging large water droplets even with a small amount of water while maintaining a flow rate, thereby realizing water saving.

  In the water discharge device disclosed in Patent Document 1, an inflow port (injection hole portion) through which water flows in from a water supply source is provided, and air introduced through the air intake passage into the water flow inflowing from the inflow port is foamed. And mix. Specifically, when water is injected from the inlet, a negative pressure is generated in the internal space, and the air introduced through the air intake passage by this negative pressure is converted into a water flow flowing in from the inlet. It is rolled into small bubbles and mixed into water. The bubble-mixed water mixed with the foamy air is discharged from a shower outlet that discharges a shower-like water flow and a rectifying outlet that discharges the water as a single stream by a switching mechanism. . In such a water discharge device, the shower water discharge port is arranged on the outer peripheral side, the rectification water discharge port is arranged in the central portion inside the shower water discharge port, and the air is separated from the shower water discharge port and the rectification water discharge port side by side with the shower water discharge port. An intake is provided.

  On the other hand, Patent Document 2 discloses a water discharge device having a structure in which water is easily collected using a rectifying network or the like before a discharge port. This water discharge device increases the flow resistance in front of the water discharge port so that the water temporarily accumulates, so that the water flow enters the gas-liquid interface between the temporarily accumulated water and air, and the water containing bubbles is mixed. Is generated.

JP 2010-167086 A JP 2012-72628 A

  By the way, in the water discharging apparatus as disclosed in Patent Document 1, it is not preferable to provide a large number of inflow ports in order to make the entire apparatus compact or to improve the design. For example, if an inlet for shower water discharge and rectified water discharge is provided, respectively, the inlet for shower water discharge is arranged on the outer peripheral side, and the inlet for rectification water discharge is arranged in the central part in accordance with the position of the water outlet. As a result, the number of inlets increases. Therefore, by sharing the shower water discharge and the rectified water discharge inlet, it is possible to provide a compact and excellent water discharge apparatus without increasing the number of the inlets.

  However, when the inflow port is shared, depending on the position where the inflow port is provided, there is a concern that the flow rate for shower water discharge decreases and the bubble mixing amount in the shower water discharge decreases accordingly. That is, the shower water discharge is different from discharging a large flow rate from one place like the rectified water discharge, and a small amount of water is branched and discharged to a small water discharge port. . And as shown in Patent Document 2, when adopting a technique of generating water-gas mixed water by causing water to enter the gas-liquid interface, the decrease in the flow velocity before the water enters the gas-liquid interface This leads to a decrease in the amount. Therefore, in order to prevent a decrease in the flow rate of water in the shower water discharge, it is desirable to arrange the inflow port on the same outer periphery as the shower water discharge port (the outer peripheral side of the apparatus).

  However, when the inflow port is arranged on the outer peripheral side of the apparatus in this way, the distance from the inflow port becomes far from the rectifying water discharge port provided in the center. Therefore, this time, there is a concern that the flow rate of water from the inlet to the rectifying spouting port decreases until it enters the gas-liquid interface on the rectifying spouting port, and as a result, the amount of bubbles mixed in the rectifying spouting port may decrease. is there.

  The present invention has been made in view of such problems, and its purpose is to prevent a decrease in the flow velocity in the apparatus and reduce the amount of bubbles mixed in even when the inlets of shower water discharge and rectified water discharge are shared. An object of the present invention is to provide a water discharge device capable of discharging bubble-mixed water without lowering.

  In order to solve the above problems, a water discharge device according to the present invention is a water discharge device that generates and discharges bubble-containing water by causing water to enter a gas-liquid interface between temporarily stored water and air, An inlet for injecting water from the water supply source, a rectifying spout for discharging bubble-mixed water as a single united water flow, and a shower discharge for discharging the bubble-mixed water in a shower-like manner disposed on the outer periphery of the rectified spout. A water outlet, a rectifying passage extending from the inlet to the rectifying outlet, and a shower passage extending from the inlet to the shower outlet. And the said inflow port is arranged along the perimeter according to the position of the above-mentioned shower spout, the 1st state which flows water into the above-mentioned rectification channel, and mixes the air from the above-mentioned shower channel into the water, A second state in which water is allowed to flow through the shower channel and air from the rectifying channel is mixed with the water can be switched, and the rectifying channel is configured to flow from the inlet to the rectifying water outlet. In the first state, a flow wall is formed, and the flow rate is suppressed from decreasing before the water flowing from the inflow port toward the rectifying water discharge port enters the gas-liquid interface. Means.

  According to the present invention as described above, it is possible to cause water to collide with the gas-liquid interface before the flow velocity of water is reduced in the rectified water discharge by the flow velocity reduction suppressing means. In order to prevent a decrease in the flow rate of shower water discharge and to ensure a sufficient amount of bubbles, the distance from the flow inlet to the rectifying water discharge port is increased by arranging the flow inlet on the same outer periphery as the shower water discharge port. Since the distance from the inflow port to the rectifying water discharge port is long, there is a concern about a decrease in the flow velocity. However, it is possible to suppress a decrease in the amount of bubbles mixed in the rectified water discharge by causing the water to collide with the gas-liquid interface before the flow speed of the water decreases in the rectified water discharge by the flow velocity reduction suppressing means. Thereby, in any of the shower water discharge and the rectified water discharge, it is possible to discharge the bubble mixed water without reducing the bubble mixed amount.

  In the water discharging apparatus according to the present invention, it is also preferable that the flow velocity reduction suppressing means raises the gas-liquid interface.

  In this preferable aspect, the distance until the water flowing from the inlet enters the gas-liquid interface can be shortened by raising the gas-liquid interface by the flow velocity reduction suppressing means. Therefore, since water can be rushed into the gas-liquid interface without reducing the flow rate of the water flowing down, it is possible to suppress a decrease in the amount of mixed bubbles.

  In the water discharge device according to the present invention, the flow velocity reduction suppressing means includes a constricted portion in which a flow passage cross-sectional area of the flow passage wall on the upstream side of the rectification water discharge port is smaller than a cross-sectional area of the rectification water discharge port, It is also preferable to be configured to expand in a tapered shape from the constricted portion toward the rectifying water discharge port.

  In this preferred embodiment, by providing a constricted portion in which the cross-sectional area of the flow path wall is smaller than the cross-sectional area of the rectifying water discharge port, the volume of the rectifying flow path is reduced to increase the gas-liquid interface. Here, as a method of raising the gas-liquid interface, it is also conceivable to increase the pressure loss of the rectifying water discharge port such as a rectifying network so that water is easily collected. However, when the pressure loss of the rectifying water discharge port is increased and water is discharged at a predetermined flow rate, the flow rate of the shower water discharge is switched from the rectified water discharge in the first state to the shower water discharge in the second state. Becomes too high. Therefore, it is possible to raise the gas-liquid interface without changing the pressure loss of the rectifying water spouting port. In particular, in this aspect, the gas-liquid interface can be raised without reducing the cross-sectional area of the rectifying water discharge port, thereby suppressing a decrease in the flow velocity of the water flow from the inlet.

  According to the present invention, even when the inlets for shower water discharge and rectified water discharge are shared, it is possible to prevent a decrease in the flow velocity in the apparatus and to discharge the bubble mixed water without reducing the bubble mixed amount. A water discharging apparatus can be provided.

It is a perspective view showing the faucet unit which attached the spout cap concerning the embodiment of the present invention. It is sectional drawing which shows the whole structure of the spout cap shown in FIG. It is a schematic diagram which shows the relationship between the inflow port of the spout cap shown in FIG. 1, a shower flow path, and a rectification flow path. It is a schematic diagram which shows the outline of an effect | action of the spout cap shown in FIG. It is a schematic diagram shown compared with the prior art about the flow velocity fall suppression means of the water outlet cap shown in FIG. It is a schematic diagram which shows the confluence | merging suppression means of the spout cap shown in FIG. It is a schematic diagram which shows the draining means of the water outlet cap shown in FIG. It is a schematic diagram which shows the modification of the spout cap shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  An outline of a water discharge cap (a water discharge device) 1 according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an example in which the spout cap 1 is used in a bathroom vanity S as a component of the faucet device FC. FIG. 2 is a cross-sectional view of the spout cap 1, and FIG. 3 is a schematic diagram showing the relationship between the inlet of the spout cap 1 and the flow paths for shower water discharge and rectified water discharge.

  The water discharge cap 1 is a component used for the water discharge port portion of the faucet device FC. As shown in FIG. 1 as an example, the faucet device FC is attached to a wash basin of the vanity table S, and is formed in a long and thin tube shape with stainless steel or the like, and stores water or receives water. For discharging water toward the bowl portion B. The faucet device FC is attached to the periphery of the bowl portion and connected to a water pipe that is a water supply source.

  As shown in FIG. 1, the spout cap 1 is attached to the tip so that the exterior is covered with the faucet device FC, and the water supplied from the water pipe is converted into shower water discharged from a plurality of thin water streams, It is constituted so that it may be made to discharge as rectified water discharge made into a single united water flow. In both of the shower water discharge and the rectified water discharge, air is sucked from the outside, and foamed air is mixed to discharge the bubble mixed water. Moreover, the spout cap 1 is comprised so that shower water discharge and rectified water discharge can be switched by rotating a front-end | tip part.

  Next, a specific configuration of the water discharge cap 1 will be described with reference to FIGS. 2 and 3. 2A is a cross-sectional view taken along the line AA shown in FIG. 3A, and FIG. 2B is a cross-sectional view taken along the line BB in FIG. 3C.

  The spout cap 1 has a cylindrical shape as a whole and includes a first tube portion 10 and a second tube portion 20. By rotating the 2nd cylinder part 20 with respect to the 1st cylinder part 10, as above-mentioned, it is comprised so that switching between shower water discharge and rectification water discharge is possible.

  Here, the state shown in FIG. 2A and FIG. 3A is a first state (hereinafter referred to as “rectified state”) in which water flows through the rectifying channel and air from the shower channel is mixed into this water. 2), and the state shown in FIG. 2 (b) and FIG. 3 (c) is a second state (hereinafter referred to as “shower state”) in which water flows through the shower channel and air from the rectifying channel is mixed into this water. "). FIG. 3 is a view of the first tube portion 10 as viewed from the bottom side (the second tube portion 20 side in FIG. 2) of the first tube portion 10, and the broken line indicates the second tube portion 20, The position of the second cylinder part 20 is projected onto the first cylinder part 10 and shown. For convenience of explanation, FIG. 3 shows a state in which the first cylinder part 10 is rotated without moving the second cylinder part 20, but the second cylinder part 20 is rotated with respect to the first cylinder part 10. It is common to make it. As described above, the spout cap 1 has an exterior covered with the tubular faucet device FC, and FIGS. 2 and 3 are diagrams showing internal components excluding the exterior.

  As shown in FIGS. 2 and 3, the first tube portion 10 includes a plurality of inlets 11 (eight here at regular intervals) for allowing water to flow in from a water pipe as a supply source. The inflow port 11 is provided along the outer periphery of the first cylindrical portion 10, and is formed at a position communicating with a shower channel 24 described later in the shower state shown in FIGS. 2B and 3C. .

  The second cylinder part 20 includes a rectifying spout 21 that discharges the bubble-containing water as a single stream, a shower fountain 22 that is disposed on the outer periphery of the rectifying spout 21 and discharges the bubble-containing water in a shower shape, Is provided. In addition, the second cylindrical portion 20 includes a rectifying channel 23 that extends from the inlet 11 to the rectifying spout 21, and a shower channel 24 that extends from the inlet 11 to the shower outlet 22.

  The rectifying water discharge port 21 is formed in the central portion of the second cylindrical portion 20, and a rectifying network 21 a having a lattice shape and having many fine holes is disposed. The water discharged from the rectifying water discharge port 21 has a gentle flow in which turbulence is suppressed by passing through the holes of the rectifying network 21a and scattering to the bowl portion B and the like is suppressed. Moreover, by giving flow-path resistance to the water which flows into the rectification spout 21 by the rectification network 21a, the water discharged to the rectification flow-path 23 mentioned later is stored temporarily, and the water and the water which were stored are stored. A gas-liquid interface (described later) is formed.

  The shower water discharge port 22 is composed of a plurality of minute holes formed at the tip of a shower channel 24 described later, and discharges water flowing through the shower channel 24 as shower water discharge. The shower spout 22 also provides flow resistance to the water flowing through the shower flow path 24, thereby imparting a flow velocity to the discharged water and temporarily storing the discharged water. And an air-liquid interface (described later) with air.

  The rectifying flow path 23 is a flow path that guides water from the inlet 11 side formed on the outer peripheral side toward the rectifying water outlet 21 formed on the center side, and the flow that forms a taper shape toward the rectifying water outlet 21. It has a road wall 23a. The flow path wall 23a may basically be formed in a tapered shape toward the rectifying water discharge port 21, but in the present embodiment, a constricted portion 23b having a minimum diameter is provided on the upstream side where the rectifying network 21a is provided. The diameter of the downstream side of the constricted portion 23b is increased to reach the rectifying water discharge port 21.

  The rectifying channel 23 is provided with a guide portion 23c that protrudes from the channel wall 23a and divides the rectifying channel 23 into a plurality of partition channels 23d on the circumference. The guide portion 23c is provided so that a plurality (eight in this case) of cylindrical members are pierced in the vertical direction with respect to the tapered flow path wall 23a on the circumference. Therefore, the guide part 23c is formed so that the rectifying water discharge port 21 side is thinner than the inflow port 11 side as a whole. In the present embodiment, in particular, the guide portion 23c is gradually narrowed on the downstream side of the first region 23c1 formed with a constant width from the inlet 11 side toward the rectifying water discharge port 21 and the first region 23c1. And a second region 23c2.

  In addition, the partition channel 23d partitioned by the guide portion 23c is formed with a certain width on the upstream side along the first region 23c1 and the second region 23c2, and then gradually expands on the downstream side. ing. And the division flow path 23d merges as one flow path in the upstream of the constriction part 23b.

  As described above, the partition channel 23d partitioned by the guide portion 23c is configured such that the flow of water from the inlet 11 toward the rectifying water discharge port 21 does not meander through the channel wall 23a, and other partition channels It regulates not to merge with the water flowing through 23d. Ideally, the guide portion 23c regulates the water so that the water advances linearly toward the conical center direction of the tapered flow path wall 23a, in other words, the central axis of the gas-liquid interface described later. It regulates at the shortest distance toward.

  The shower channel 24 is a channel that guides water from the inlet 11 formed on the outer peripheral side toward the shower outlet 22. Specifically, the shower flow path 24 is disposed outside the rectification flow path 23 with the flow path wall 23 a interposed therebetween in the second cylindrical portion 20. The shower channel 24 is provided with a plurality of cylindrical vertical holes 24a on the circumference on the upstream side, and on the downstream side, the lower portion of the second cylinder portion 20 is circumferentially penetrated in a donut shape, The retention part 24b which stores water is provided.

  A plurality of vertical holes 24a constituting the shower channel 24 are provided on the outer peripheral side of the second cylindrical portion 20 so as to match the position on the outer periphery of the inlet 11 so that the water from the inlet 11 flows down directly in the direction of gravity. (Here, eight are provided at equal intervals). Note that the wall surface of the vertical hole 24 a protrudes into the rectifying channel 23 and functions as a guide portion 23 c in the rectifying channel 23.

  On the other hand, the retention portion 24b, which is another component of the shower channel 24, protrudes inwardly of the second cylindrical portion 20 at a portion where the channel wall 23a of the rectifying channel 23 has a tapered slope, and has a volume. It is spreading. This portion protrudes toward the rectifying flow path 23, and a constricted portion 23b is formed on the rectifying flow path 23 side with a flow path wall 23a therebetween.

  Further, the staying portion 24b has an annular step portion 24c in a portion where the downstream flow path wall 23a extends toward the rectifying water discharge port 21 provided with the rectifying network 21a. The stepped portion 24c is arranged so that at least a part thereof overlaps the cross section of the vertical hole portion 24a. Therefore, when the second tube portion 20 of the water discharge cap 1 is rotated to switch from the rectifying state to the shower state, the water flowing in from the vertical hole 24a of the shower channel 24 first flows directly below, It collides with the part 24c. In the present embodiment, it is desirable that a part of the water flowing from the vertical hole 24a collides with the stepped portion 24c and the other portion does not collide with the stepped portion 24c. In the present embodiment, the stepped portion 24c and the shower spout 22 are formed such that the stepped portion 24c is formed of the same member as the shower spout 22 so as to be formed as a part of the second tube portion 20. Are preferably formed in a fixed manner.

  An outline of the action of the spout cap 1 configured as described above will be described with reference to FIG. FIG. 4A is a diagram showing a water discharge state in which water W is allowed to flow through the rectifying channel 23 and air Air from the shower channel 24 is mixed into the water W as the rectifying state that is the first state. FIG. 5B is a diagram showing a water discharge state in which water W is allowed to flow through the shower channel 24 and air Air from the rectifying channel 23 is mixed into the water W as the shower state which is the second state. .

  As shown in FIG. 4A, in the rectifying state, when water W is supplied from a plurality of inflow ports 11 formed on the outer periphery of the first cylindrical portion 10, the water W flows down in the direction of gravity and rectifies. It flows into the flow path 23 and collides with the flow path wall 23a. The water W splashes from the flow path wall 23a, flows down through the flow path wall 23a, and is guided to the rectifying water discharge port 21 side. In addition, the relationship between the inflow port 11 and the 2nd cylinder part 20 in this rectification | straightening state is a state shown to Fig.3 (a).

  At this time, the shower spout 22 functions as an air inlet, and the shower channel 24 functions as an air channel. That is, as shown in FIG. 4A, when water is ejected from the inlet 11 toward the rectifying channel 23, a negative pressure is generated in the shower channel 24, and the shower channel 22 Air Air flows into the rectifying flow path 23 through 24. The air Air passes from the staying part 24b through the vertical hole 24a, flows into the rectifying flow path 23, is entrained in the flow of the water W, and is made into a foam.

  A gas-liquid interface Ia is formed in the rectifying water discharge port 21 by temporarily retaining water on the rectifying network 21a. The water W enters the gas-liquid interface Ia, and the air Air made into a foam is mixed therein, thereby generating bubble-containing water Bw. The bubble mixed water Bw passes through the rectifying network 21a and is sequentially discharged from the rectifying water discharge port 21.

  On the other hand, as shown in FIG. 4B, in the shower state, when water W is supplied from a plurality of inflow ports 11 formed on the outer periphery of the first tube portion 10, the water W flows down in the direction of gravity. Then, it flows into the vertical hole 24a of the shower channel 24 and is led to the staying portion 24b directly below. In addition, the relationship between the inflow port 11 and the 2nd cylinder part 20 in this rectification | straightening state is a state shown in FIG.3 (c).

  At this time, the rectification water discharge port 21 functions as an air introduction port, and the rectification flow channel 23 functions as an air flow channel. That is, as shown in FIG. 4A, when water is ejected from the inflow port 11 toward the rectifying channel 23, a negative pressure is generated on the rectifying channel 23 side, and the rectified flow from the rectifying water discharge port 21 is generated. Air Air flows into the rectifying flow path 23 through the path 23. The air Air passes through the rectifying channel 23 from the rectifying network 21a, flows into the vertical hole 24a of the shower channel 24, and is entrained in the flow of the water W to be foamed.

  In the shower channel 24, the gas-liquid interface Ib is formed by temporarily retaining water in the retention part 24 b due to the channel resistance of the shower outlet 22. When the water W enters the gas-liquid interface Ib and the air Air made into a foam is mixed therein, the bubble mixed water Bw is generated. The bubble mixed water Bw passes through the shower spout 22 and is discharged to the outside.

  In the spout cap 1 of this embodiment, the 2nd cylinder part 20 is rotated with respect to the 1st cylinder part 10 in the rectification | straightening state which is the above 1st states, and the shower state which is the 2nd state. By doing so, it is realized by shifting from the state shown in FIG. 3A to the state shown in FIG.

  Based on the above-described configuration and schematic action of the spout cap 1, each means included in the spout cap 1 will be described with reference to FIGS. 5 to 8.

  FIG. 5 is a schematic diagram for explaining the flow velocity reduction suppressing means of the water discharge cap 1. In the rectification state that is the first state, the flow velocity decrease suppression unit of the present embodiment is configured such that the water W from the inflow port 11 toward the rectification water discharge port 21 is formed on the gas-liquid interface Ia formed by the water remaining in the rectification water discharge port 21 It is the structure which suppresses that the flow velocity of the water W falls before rushing.

  As shown in FIG. 5 (a), the flow velocity reduction suppressing means is a means for raising the gas-liquid interface Ia, and by raising the gas-liquid interface Ia, the water W flowing down from the inlet 11 becomes the gas-liquid interface Ia. The distance to reach is shortened. In this way, by reducing the distance from the water W flowing down until it reaches the gas-liquid interface Ia, it is possible to prevent the flow rate of the water W flowing down to the flow path wall 23a and the like from decreasing. it can.

  More specifically, the flow velocity reduction suppressing means reduces the volume of the rectifying flow path 23 toward the rectifying water discharge port 21 so that the rectifying flow path 23 forms a taper shape toward the rectifying water discharging port 21. The gas-liquid interface Ia is raised. FIG.5 (b) shows the conventional structure which is not provided with the flow velocity fall suppression means as a comparative example. In FIG.5 (b), in the structure corresponded to the flow-path wall 23a of the rectification | straightening flow path 23 of this embodiment, it is formed in the perpendicular direction instead of a taper shape. In such an embodiment, there is no change in the volume of the rectifying flow path 23 toward the rectifying water discharge port 21, and no rise in the gas-liquid interface Ix is observed.

  According to the flow velocity reduction suppressing means of the spout cap 1 as described above, the following effects are obtained. That is, in order to prevent a decrease in the flow rate of shower water discharge and to ensure a sufficient amount of bubbles, the inflow port 11 is disposed on the same outer periphery as the shower water discharge port 22. Thereby, the distance from the inflow port 11 to the rectification water discharge port 21 became long. Since the distance from the inlet 11 to the rectifying water discharge port 21 is long in this way, there is a concern about a decrease in the flow rate. Water W can collide with the liquid interface Ia. Therefore, it is possible to suppress a reduction in the amount of bubbles mixed in the rectified water discharge. Thereby, in any of the shower water discharge and the rectified water discharge, it is possible to discharge the bubble mixed water without reducing the bubble mixed amount.

  Specifically, the distance until the water W flowing from the inlet 11 enters the gas-liquid interface Ia can be shortened by raising the gas-liquid interface Ia by the flow velocity reduction suppressing means. Therefore, the water W can be rushed into the gas-liquid interface Ia without reducing the flow velocity of the flowing water W.

  More specifically, the flow path wall 23a is tapered to reduce the volume of the rectifying flow path. As a result, the gas-liquid interface Ia is raised. Here, as a method of raising the gas-liquid interface Ia, it is also conceivable that the pressure loss of the rectifying water discharge port 21 such as the rectifying network 21a is increased so that water is more easily collected. However, when the pressure loss of the rectifying water discharge port 21 is increased and water is discharged at a predetermined flow rate, the flow rate of the shower water discharge becomes too high when switching from the rectified water discharging state to the shower water discharging state. In this embodiment, the gas-liquid interface Ia is raised without changing the pressure loss of the rectifying water discharge port 21.

  In particular, by providing the constricted portion 23b in which the channel cross-sectional area of the channel wall 23a is smaller than the cross-sectional area of the rectifying water discharge port 21, the volume of water accumulated on the rectifying water discharging port 21 side can be reduced. Thereby, the gas-liquid interface Ia rises and the fall of the flow velocity of the water flow from the inflow port 11 can be suppressed.

  FIG. 6 is a schematic diagram for explaining the confluence suppressing means of the spout cap 1. In the rectification state that is the first state, the confluence suppressing unit of the present embodiment is configured such that the water W from the inlet 11 toward the rectifying water outlet 21 is the water that is directed from the other inlet 11 toward the rectifying water outlet 21, It is the structure which suppresses joining before rushing into Ia.

  FIG. 6A schematically shows a state where the water W flowing down from the inlet 11 flows in a foam state in the rectified state. Moreover, FIG.6 (b) represents the flow Ws in each position of the water W which flows down in foamy form by the arrow.

  As shown in these drawings, the water W flowing down from the inflow port 11 is restricted in the partition flow path 23d along the guide portion 23c, and does not merge with the water W flowing down from the other inflow port 11 by the guide portion 23c. become.

  Here, as shown to Fig.6 (a) and (b), the front-end | tip part of the guide part 23c is comprised so that it may be located in the upstream rather than the gas-liquid interface Ia. If the guide part 23c has reached the gas-liquid interface Ia, it will enter into the gas-liquid interface Ia in a state where confluence is suppressed, that is, in a state where the width of the jet water is narrow. In this case, there are places where the flow Ws of the flowing water is fast and slow, the discharge shape of the rectified water discharge is disturbed, or the width of the flow Ws is narrow, so that the contact area with the air is reduced and the amount of bubbles mixed in is reduced. This is because it may decrease. Therefore, by positioning the tip of the guide portion 23c upstream of the gas-liquid interface Ia, the surface area of the water flow Ws that enters the gas-liquid interface Ia can be increased, and the reduction in the amount of bubbles mixed in is suppressed. it can.

  In this way, in the confluence suppressing means shown in FIG. 6, it is possible to suppress a decrease in the flow rate of water by preventing the inflowing water from colliding until it reaches the gas-liquid interface. Thereby, water can collide with a gas-liquid interface, before the flow velocity of water falls in rectified water discharge. Further, as shown in FIG. 6, the guide portion 23c is formed with a smooth surface that does not obstruct the flow of water, so that the water W flowing down from the inflow port 11 is disturbed on the way to the gas-liquid interface Ia. It can suppress and the fall of the flow rate by disturbing can be suppressed.

  In addition, the guide portion 23c has a first region 23c1 formed with a constant width from the inlet 11 side toward the rectifying water discharge port 21, and a second region 23c2 that becomes gradually narrower on the downstream side than the first region 23c1. It consists of. Thereby, the flow rate of the water W flowing down from the inlet 11 does not decrease in the upstream first region 23c1, and the surface area of the water entering the gas-liquid interface is increased in the downstream second region 23c2. Can do. Therefore, sufficient bubbles can be mixed in the water W that enters the gas-liquid interface Ia.

  FIG. 7 is a schematic diagram for explaining the water draining means of the spout cap 1. The draining means of the present embodiment drains the water retained in the rectifying network 21a of the rectifying water outlet 21 in the first state when switching from the rectifying state being the first state to the shower state being the second state. It is the structure to perform.

  More specifically, the water draining means is formed in the shower channel 24, and when the rectified state is switched to the shower state, the water W flowing in the shower channel 24 is the wall surface of the shower channel 24, that is, the step portion. By colliding with 24c, vibration is generated in the rectifying water discharge port 21 in which water is temporarily stored.

  FIG. 7A is a diagram showing a state immediately after the rectification state is switched to the shower state and water W is introduced into the shower channel 24. As described above, in the shower channel 24, the stepped portion 24c is arranged so that at least a part thereof overlaps the cross section of the vertical hole portion 24a. Therefore, when switching from the rectifying state to the shower state, the water flowing in from the vertical hole 24a of the shower channel 24 first flows directly below and collides with the stepped portion 24c. This impact is transmitted to the rectifying water outlet 21 formed integrally with the stepped portion 24c, so that the rectifying water outlet 21 vibrates. As a result, as shown in FIG. 7 (a), the residual water Wr remaining in the rectifying network 21a is dropped at the time of switching from the rectified state to the shower state, and as shown in FIG. 7 (b), from the switched initial state. The rectifying water spouting port 21 can function as an air intake port.

  Moreover, as shown in FIG.7 (b), in this aspect, the step part 24c is downstream from the gas-liquid interface Ib formed when water is temporarily stored in the shower channel 24 in the shower state. Is formed. This is because if the step portion 24c is provided upstream of the gas-liquid interface Ib, the water W from the inlet 11 collides with the step portion 24c before entering the gas-liquid interface Ib. End up. Thus, if water W decelerates and enters the gas-liquid interface Ib, there is a concern that the amount of bubbles mixed in decreases.

  In the embodiment shown in FIG. 7 as described above, the rectifying water outlet 21 is provided with a rectifying network 21a so that water is easily collected for a certain period of time. In the initial state where the rectifying state is switched to the shower state, the rectifying water outlet Water is accumulated in 21. Therefore, when switching to the shower state, the rectifying channel 23 cannot be used as an air channel. Therefore, when the rectification state is switched to the shower state, by providing a drainage means for draining the water staying in the rectification spout 21, the rectification flow path 23 can be changed immediately after the rectification state is switched to the shower state. It can function as an air flow path. Thereby, bubble mixed water can be discharged in shower water discharge from the initial stage of switching from rectified water discharge to shower water discharge.

  In the shower channel 24, the stepped portion 24c is arranged so that at least a part thereof overlaps the cross section of the vertical hole portion 24a. Therefore, all of the water flowing down from the inflow port 11 does not collide with the step portion 24c of the shower channel 24 and the pressure in the vicinity of the shower spout 22 is not reduced. Therefore, it is possible to discharge water accumulated in the rectifying water spouting port by giving a vibration to the rectifying water spouting port while suppressing a decrease in the flow velocity discharged from the shower water spouting port 22.

  Further, by forming the step portion 24 c and the rectifying water discharge port 21 integrally, the vibration generated in the step portion 24 c can be directly transmitted to the rectifying water discharging port 21. Thereby, the water accumulated in the rectifying water discharge port 21 can be discharged more reliably.

  FIG. 8 shows a modification of the water draining means of the water discharge cap 1. That is, in this aspect, the 2nd cylinder part 30 is connected via the elastic member 24d. When switching from the rectification state, which is the first state, to the shower state, which is the second state, vibration generated by the collision of the water W flowing down from the inlet 11 with the stepped portion 24c is attenuated with respect to the rectifier outlet. Therefore, the water accumulated in the rectifying water outlet can be discharged more efficiently.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, and the like are not limited to those illustrated, and can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

1: Spout cap 10: Cylinder 11: Inlet 20: Cylinder 21: Rectifier spout 21a: Rectifier network 22: Shower spout 23: Rectifier channel 23a: Channel wall 23b: Constricted portion 23c: Guide portion 23c1 : First region 23c2: second region 23d: partitioning channel 24: shower channel 24: shower channel 24a: vertical hole 24b: staying part 24c: stepped part 24d: elastic member 30: cylinder part B: bowl part Bw: bubble Mixed water FC: faucet device Ia: gas-liquid interface Ib: gas-liquid interface Ix: gas-liquid interface S: vanity W: water Wr: residual water

Claims (3)

A water discharge device that generates and discharges bubble-containing water by causing water to enter a gas-liquid interface between temporarily stored water and air,
An inlet through which water flows in from a water supply source;
A rectifying spout that discharges the water mixed with bubbles as a single stream of water;
A shower outlet that is disposed on the outer periphery of the flow straightening outlet and discharges the mixed water in a shower shape;
A rectifying channel extending from the inlet to the rectifying spout, and a shower channel extending from the inlet to the shower outlet,
The inflow port is arranged along the outer periphery according to the position of the shower spout,
A first state in which water flows into the rectifying channel and air from the shower channel is mixed into the water, and a second state in which water flows into the shower channel and air from the rectifying channel is mixed into the water And can be switched,
In the rectifying channel, a channel wall is formed that leads from the inlet to the rectifying water outlet,
In the first state, there is provided a flow rate reduction suppressing unit that suppresses a decrease in the flow rate of water before the water flowing from the inlet to the rectifying water outlet enters the gas-liquid interface. A water discharge device.   The water discharge device according to claim 1, wherein the flow velocity reduction suppressing means raises the gas-liquid interface. The flow velocity reduction suppressing means includes a constricted portion in which a flow passage cross-sectional area of the flow passage wall on the upstream side of the rectifying spout is made smaller than a cross-sectional area of the rectifying spout,
The water discharge device according to claim 1, wherein the water discharge device is configured to expand in a tapered shape from the constricted portion toward the rectifying water discharge port.

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