JP5545598B2 - Water discharge device - Google Patents

Description

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

  Conventionally, as a water discharging device, in order to reduce the sound of water landing on the sink or sink bowl of the water discharge destination, or to suppress water splashing at that time, bubbles are mixed into the water discharge to discharge the bubble mixed water. Proposed. In particular, as described in Patent Document 1 below, a water discharge device has been proposed that increases the mixing rate of bubbles from a low flow rate stage with a low flow rate, in order to increase the amount of water discharge.

  The water discharge device described in the following Patent Document 1 includes a foam water discharge member provided with an air mixing mechanism and a rectifying mechanism in this order from the upstream side in a flow path extending between an inflow port and a discharge port. It is provided at the water outlet end of the faucet. The air mixing mechanism includes a pressure reducing plate, a flow path surrounding wall formed downstream of the pressure reducing plate, and a backflow prevention unit formed downstream of the flow path surrounding wall. The decompression plate is a circle concentric with the discharge port and has a plurality of small holes disposed on the circumference of a circle having a larger diameter than the discharge port, and is disposed so as to block the flow path. Yes. An air hole is formed in the flow path wall downstream of the decompression plate. A backflow prevention unit is disposed downstream of the region where the air holes are formed. The rectifying mechanism includes an inclined portion, a rectifying portion, a rectifying grid, and a rectifying path. The inclined portion has a flow path that has a diameter reduced to a funnel shape downstream of the backflow prevention portion. The rectifying unit has a flow path concentric with the discharge port extending from the downstream end of the inclined portion toward the discharge port. The rectifying grid is a grid-like portion disposed so as to block the rectifying unit of the flow path. The rectification path is a flow path connected to the rectification unit downstream of the rectification grid. Further, a throttle portion having a channel cross-section smaller than the channel cross-sectional area of the joint is provided upstream of the decompression plate.

  The water discharge device described in the following Patent Document 1 has the above-described configuration, so that when washing water passes through the small hole of the decompression plate, the pressure energy is converted into kinetic energy, and the jet from the small hole increases the flow velocity. The jet entrains the surrounding air due to viscosity. The water flow generated by entraining air in this way becomes a high-speed water flow containing relatively large bubbles and collides with a funnel-shaped inclined portion. The high-speed water flow that collides with the inclined portion becomes turbulent, breaks up relatively large bubbles contained therein, and is converted into a bubble-containing water flow containing fine bubbles. The bubble-mixed water stream converges along the inclined portion, is rectified by the rectifying grid, is collected by the rectifying path, and is discharged from the discharge port.

JP 2002-275969 A

  Since the water discharge device described in Patent Document 1 generates bubble-containing water by a so-called ejector effect, it effectively generates bubble-containing water containing fine bubbles at a low flow rate stage, and a sink or a wash surface from the discharge port. Can be discharged toward the bowl.

  By the way, when the bubble-mixed water is generated by the ejector effect, it is generated by the effect of entrainment of air by increasing the flow velocity of the jet flow from the small hole of the decompression plate. Therefore, if the amount of water increases and the flow rate increases, the amount of air mixed in as bubbles with respect to water tends to increase according to the increased flow rate. Therefore, even when the flow rate shifts to the high flow rate stage where the flow velocity is high, the bubble mixed water having a high bubble mixing rate is generated and discharged.

  In the low-flow stage, the water containing bubbles is basically increased by increasing the bubble mixing rate, thereby reducing the sound of water landing on the sink and sink bowl of the water discharge destination, and suppressing water splashing at that time. Without impairing the purpose, the amount of water discharged can be increased, and water can be saved. Therefore, the arrangement and shape of each member are devised in the direction of increasing the bubble mixing rate as much as possible in the low flow rate stage.

  However, in an actual use situation, not only such a low flow rate water supply but also a high flow rate water supply is required. For example, when water is stored in a cup or vase, there is a scene where it is necessary to increase the amount of water supplied in order to quickly fill the water. In the water discharge device described in Patent Document 1, since the mixing rate of bubbles increases when the flow rate is high, as a result, the increase in the total amount due to the increase in the mixing rate of bubbles has an effect rather than the increase in the amount of water intended by the user. However, a large flow rate of bubble-containing water exceeding the expected sensation is discharged. In particular, as described above, the more the device for increasing the bubble mixing rate at the low flow rate stage is, the more noticeable these events appear at the high flow rate stage.

  If you are washing dishes or washing your hands, if there is a sense of volume and the cleaning power does not change, it is preferable to use low-flow water discharge from the viewpoint of practical use and water saving. One should also use this low flow rate water discharge. However, when water is stored in a glass or vase, the psychology of wanting to store water works quickly, so it is natural for the user to operate the water discharge device so that the flow rate is high.

  In this way, as a result of the user operating the water discharge device so that the flow rate becomes high according to the sensation, the total amount of bubbles (corresponding to the actual amount of water and the amount of bubbles) that the user feels greatly exceeds the intended amount of water When water is discharged, the volume of water discharged will surely increase, but even if you try to collect water in a cup or vase, it will overflow with a folded flow due to the strong momentum of the water, and only about half the capacity of the cup will be stored. Things can't happen. Furthermore, even if you intend to store about half of the water in a glass or vase, you will actually pour the mixed water that is increased by the amount of bubbles, so even if you recognize that the user has collected about half of the water. It can happen that less water is actually collected. In addition to the situation where water is stored in a cup or vase, there is a risk that the basic purpose of reducing the sound of water landing on the sink or wash bowl at the water discharge destination or suppressing water splashing at that time may be impaired. is there.

  In order to avoid these problems, if the user has to finely adjust the amount of discharged water, the operation is complicated and requires a delicate sensation. is there. In addition, it is conceivable to manually adjust the opening of the air hole according to the increase in the amount of discharged water and to increase the bubble mixing rate in the case of a low flow rate, while suppressing the bubble mixing rate in the case of a high flow rate, This also imposes troublesome work on the user, and the usability is extremely poor in actual use.

  The present invention has been made in view of such a problem, and the purpose of the present invention is to incorporate air bubbles with an increased bubble mixing rate at a low flow rate stage even if the user adjusts the flow rate in the same manner as a conventional water discharge device. It is an object of the present invention to provide a water discharging device capable of discharging water and capable of preventing discharge of a total amount of bubble-containing water that feels that a user has greatly exceeded the amount of water intended by the user at a high flow rate stage. .

  In order to solve the above-described problem, a water discharge device according to the present invention is a water discharge device capable of discharging bubble-mixed water, and supplies a discharge port for discharging water and water discharged from the discharge port. A main body formed with an inflow port for inflow from the source, an internal flow path from the inflow port to the discharge port, and water flowing in from the inflow port is provided so as to block the internal flow path A pressure reducing plate formed with a plurality of holes for injecting air toward the downstream side of the internal flow path, and an opening for introducing air into the internal flow path, and the air introduced from the opening is A bubble mixing part that is mixed with water jetted from a plurality of holes to form bubble mixed water and is supplied to the discharge port, and a mixing rate that adjusts the mixing ratio of bubbles mixed into the bubble mixed water at the bubble mixing part An adjustment unit. The bubble mixing part is configured to generate a negative pressure by water sprayed from the plurality of holes and to draw air from the opening by the action of the negative pressure. When the water flowing in from the inflow port exceeds a predetermined flow rate, the mixing rate adjusting unit reduces the opening area of the opening and forms a path through which the water reaches downstream from the decompression plate. By forming it as a bypass flow path other than the main flow path that passes through, it is configured to perform a composite adjustment operation that suppresses an increase in the flow rate of water ejected from the plurality of holes and suppresses an increase in the mixing rate.

  In the water discharge device according to the present invention, in the bubble mixing section, air introduced from the opening section is mixed into the water jetted from the plurality of holes to form bubble mixed water and discharged from the discharge port. It is possible to easily produce bubble-containing water by using it.

  Further, since the mixing rate adjusting unit is provided, it is possible to supply the bubble mixed water having a high bubble mixing rate at the low flow rate stage. Therefore, it is possible to discharge water with a sense of volume even at a low flow rate stage, and it is possible to do dishwashing and hand washing with a small amount of water compared to water discharged without air bubbles, contributing to water saving and suppressing water splashing. You can also.

  The mixing rate adjusting unit can maintain the bubble mixing rate or reduce the bubble mixing rate according to the amount of water flowing in from the inlet. Therefore, even if the setting is made to raise the bubble mixing rate to the limit at the low flow rate stage, the increase in the bubble mixing rate is suppressed with the increase in the flow rate from there, and the optimum in the region where the predetermined flow rate is exceeded. Mixing rate can be achieved. Therefore, as a result of the user's operation to increase the flow rate according to his / her sense, a total amount of bubble-containing water (corresponding to the actual amount of water and the amount of bubbles) that feels that the amount of water intended by the user has been greatly exceeded is discharged. Can be avoided.

  Specifically, when trying to store water in a cup or vase, it overflows with a return flow due to the strong momentum of the water (the total amount of water discharged is more than necessary), and only about half the capacity of the cup. You can avoid things that cannot be saved. Furthermore, when about half of the water is stored in the glass or vase, the increase in the amount of bubbles can be suppressed, so that the target amount of water can be stored. Further, since unnecessary bubbles can be subtracted from the total amount of water discharged at the high flow rate stage, the difference between the low flow rate stage and the high flow rate stage can be reduced in terms of the total amount of water discharge. Therefore, a large increase or decrease in the flow rate of the water discharge flow can be suppressed, and a large fluctuation in the water discharge momentum can also be suppressed, so that fluctuations in the water discharge trajectory such as when discharging water obliquely can be suppressed. Water discharge to the position becomes easy.

  Furthermore, in this invention, in order to control the mixing rate of the bubble to water discharge reliably, it is comprised so that a mixing rate adjustment part may perform composite adjustment operation | movement. Specifically, when the water flowing in from the inflow port exceeds a predetermined flow rate, the mixing rate adjusting unit reduces the opening area of the opening and forms a plurality of holes in the path leading to the water downstream from the decompression plate. In addition to the main flow path, the bypass flow path is also formed. By configuring in this way, in addition to limiting the amount of air supplied, it is possible to suppress an increase in the flow rate of water injected from a plurality of holes, and to suppress an increase in the mixing rate by a synergistic effect. it can.

  As described above, according to the present invention, the user can adjust the amount of discharged water more finely or manually adjust the amount of air introduced, and the optimum air bubbles in both the low flow rate stage and the high flow rate stage. It is possible to enjoy water discharge with the mixing rate of. Therefore, even if the user adjusts the flow rate in the same way as a conventional water discharge device, it is possible to discharge the bubble mixed water with an increased bubble mixing rate at the low flow rate stage, and the user intends at the high flow rate stage. Therefore, it is possible to provide a water discharging device capable of preventing the total amount of bubble-mixed water that feels that the amount of water greatly exceeded has been discharged.

  Moreover, in the water discharging apparatus which concerns on this invention, the said mixing rate adjustment part is based on the pressure difference of the water pressure of the upstream in the said internal flow path rather than the said pressure reduction plate, and the water pressure of the downstream in the said internal flow path rather than the said pressure reduction plate. It is also preferable that the head is configured to move forward and backward along a main direction from the inlet to the discharge port, and when the pressure difference exceeds a threshold pressure, the combined adjustment operation is preferably executed.

  In this preferred embodiment, since the composite adjustment operation is performed when the pressure difference between the upstream water pressure and the downstream water pressure exceeds the threshold pressure across the decompression plate, the amount of water flowing in from the inflow port The composite adjustment operation can be performed with a simple configuration in which the mixing rate adjustment unit is operated by water pressure without providing a means for directly measuring the above. Therefore, with a small and simple configuration, it is possible to discharge the bubble-containing water with an increased bubble mixing rate at the low flow rate stage, and the total amount that the user feels greatly exceeds the amount of water intended by the user at the high flow rate stage. It is possible to provide a water discharging device capable of preventing the bubble mixed water from being discharged.

  Moreover, in the water discharging apparatus which concerns on this invention, the said mixing rate adjustment part has the change rate of the minimum flow path cross-sectional area in the said bypass flow path way smaller than the change rate of the opening area of the said opening part in the said composite adjustment operation | movement. It is also preferable to adjust so that it becomes.

  As described above, in a preferred aspect of the present invention, the composite adjustment operation is performed when the pressure difference between the upstream water pressure and the downstream water pressure exceeds the threshold pressure with the decompression plate interposed therebetween. On the other hand, if the minimum flow cross-sectional area in the bypass flow path is excessively increased in order to increase the amount of water flowing in the bypass flow path, the pressure difference around the mixing rate adjusting unit, which is the driving force source of the mixing rate adjusting unit, is increased. There is a risk that it will decrease more than necessary. On the other hand, it is necessary to secure a sufficient adjustment width of the air introduction amount in order to form water discharge with an appropriate mixing ratio of bubbles. Therefore, in this preferred embodiment, in the composite adjustment operation, the mixing rate adjustment unit adjusts the change rate of the minimum flow path cross-sectional area along the bypass flow path to be smaller than the change rate of the opening area of the opening. When advancing and retreating along the main direction, the amount of air passing through the opening is ensured while suppressing changes in the amount of water passing through the bypass flow path. By comprising in this way, the adjustment range of the air introduction amount can be ensured without increasing the minimum flow path cross-sectional area of the bypass flow path more than necessary.

  Further, in the water discharge device according to the present invention, the portion forming the minimum flow path cross-sectional area in the bypass flow path includes a slant wall surface extending in a slant direction intersecting with the main direction, and a confrontation formed facing the slant wall surface. It is also preferable that the minimum channel cross-sectional area is increased or decreased by moving the slant wall surface and the opposing wall surface back and forth along the main direction.

  According to this preferable aspect, the slant wall surface extending in the oblique direction intersecting with the main direction and the opposed wall surface facing the slant wall surface are formed, and the slant wall surface and the opposed wall surface advance and retreat along the main direction to minimize the flow. Since the road cross-sectional area is increased / decreased, the increase / decrease amount of the minimum flow path cross-sectional area can be reduced with respect to the movement amount of the mixing rate adjusting unit in the main direction. In this way, with a simple configuration in which the inclined wall surface and the opposing wall surface are formed, it is possible to secure the adjustment range of the air introduction amount without increasing the amount of water flowing through the bypass channel more than necessary.

  Further, in the water discharge device according to the present invention, the mixing rate adjusting unit changes the opening area of the opening so that the rate of change is constant in the combined adjustment operation, while the minimum flow along the bypass flow path. The cross-sectional area of the channel is changed so that a constant rate change area where the change rate of the flow-path cross-sectional area is constant and a non-change area where the flow-path cross-sectional area does not change are continuous. It is also preferable to adjust so as not to exceed the area.

  As described above, in a preferred aspect of the present invention, the composite adjustment operation is performed when the pressure difference between the upstream water pressure and the downstream water pressure exceeds the threshold pressure with the decompression plate interposed therebetween. On the other hand, if the minimum flow cross-sectional area in the bypass flow path is excessively increased in order to increase the amount of water flowing in the bypass flow path, the pressure difference around the mixing rate adjusting unit, which is the driving force source of the mixing rate adjusting unit, is increased. There is a risk that it will decrease more than necessary. Therefore, in this preferred embodiment, the minimum flow path cross-sectional area along the bypass flow path is changed so that the constant rate change area and the non-change area are continuous. With this configuration, even if the stroke amount, which is the amount of movement of the mixing rate adjustment unit, fluctuates significantly, a part of the change can be absorbed in the unchanged region, and the mixing rate adjustment unit can be driven. Can be secured.

  Further, in the water discharge device according to the present invention, the portion that forms the minimum flow path cross-sectional area along the bypass flow path, the first portion that changes the flow path cross-sectional area so that the change rate of the flow path cross-sectional area is constant, It is also preferable that the flow path cross-sectional area is constituted by any one of the second parts configured so as not to be deformed. In this preferred embodiment, the first portion is formed by an oblique wall surface extending in an oblique direction intersecting the main direction and an opposed wall surface formed to face the oblique wall surface, and the oblique wall surface and the opposed wall surface are The flow path cross-sectional area is configured to increase or decrease by moving back and forth along the main direction. The second portion is formed by a pair of parallel wall surfaces extending along the main direction, and the pair of parallel wall surfaces move along the main direction, so that the flow path cross-sectional area is kept constant. Configured to be. With such a configuration, the widest channel cross-sectional area in the first portion is configured to be the same as the channel cross-sectional area in the second portion.

  According to this preferred embodiment, the portion constituting the minimum flow path cross-sectional area is constituted by one of the first portion corresponding to the constant rate change region and the second portion corresponding to the non-change region. It corresponds to such a large fluctuation of the flow rate. Therefore, even if the stroke amount of the mixing rate adjusting unit varies greatly with a simple configuration in which the first portion having the oblique wall surface and the opposing wall surface and the second portion having the pair of parallel wall surfaces are formed, the mixing rate adjustment is performed. The driving of the part can be ensured.

  Moreover, in the water discharging apparatus which concerns on this invention, the said mixing rate adjustment part has a pressure loss means for raising the pressure loss of the said main flow path rather than the said bypass flow path in the upstream in the said internal flow path rather than the said pressure reduction plate. It is also preferable.

  According to this preferable aspect, the pressure loss of the main flow path can be increased more than that of the bypass flow path by the pressure loss means, so that the flow rate of water ejected from the plurality of holes can be reduced. Therefore, the increase in the flow rate of the water discharged from the plurality of holes can be reliably reduced by the pressure loss means.

  Moreover, in the water discharging apparatus which concerns on this invention, it is also preferable that it is comprised so that the water which passes the said bypass flow path may interfere with the water which passes the said several hole.

  According to this preferable aspect, the flow rate of the water which passes a some hole can be reduced by making the water which passes a bypass flow path interfere with the water which passes a some hole. Therefore, the water passing through the bypass channel can be used effectively, and even if the number of bypass channels is reduced, the flow rate of water passing through the plurality of holes can be reliably reduced.

  According to the present invention, even if the user adjusts the flow rate in the same way as a conventional water discharge device, it is possible to discharge the bubble mixed water with an increased bubble mixing rate at the low flow rate stage, and at the high flow rate stage. It is possible to provide a water discharger capable of preventing the total amount of bubble-mixed water from being felt to greatly exceed the amount of water intended by the user.

It is a perspective view showing a faucet device which attached a spout cap which is a first embodiment of the present invention. It is a cross-sectional perspective view which shows the cross section in the centerline of the spout cap shown in FIG. It is an expanded sectional view of FIG. It is a figure which shows the relationship between the amount of water and a bubble mixing rate at the time of using the spout cap shown in FIG. It is sectional drawing which shows the spout cap which concerns on the 1st modification of 1st embodiment of this invention. It is an expanded sectional view of FIG. It is sectional drawing which shows the spout cap which concerns on the 2nd modification of 1st embodiment of this invention. It is an expanded sectional view of FIG. It is sectional drawing which shows the spout cap which concerns on 2nd embodiment of this invention. It is sectional drawing which shows the spout cap which concerns on 2nd embodiment of this invention. It is an expanded sectional view of FIG. It is sectional drawing which shows the spout cap which concerns on 2nd embodiment of this invention.

  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.

  A water discharge cap (a water discharge device) according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a perspective view showing a faucet device FC as a water discharge device. The faucet device FC is attached to a wash basin, a hand basin, a sink or the like, and is used to discharge water toward a bowl portion for storing water or receiving water. 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.

  The faucet device FC includes a standing portion B1, a spout portion B2, a water discharge handle HL, and a water discharge cap BC. The standing portion B1 is a portion that is fixed to the attachment surface, and is a portion that is attached and fixed in a state of being inclined perpendicularly or toward the near side from the attachment surface.

  The spout part B2 connected to the standing part B1 is a part that discharges water from the water outlet at the tip. The spout part B2 is provided in the vicinity of the upper end of the standing part B1 so as to protrude along the substantially horizontal direction.

  A water discharge handle HL is provided at the upper end of the standing portion B1. By operating the water discharge handle HL up and down, water discharge and water stop can be switched, and the water discharge amount can also be adjusted. It is also possible to change the temperature of the water discharge by operating the water discharge handle HL left and right.

  Next, the spout cap BC attached to the spout of the spout B2 will be described with reference to FIG. FIG. 2 is a cross-sectional perspective view showing a cross section taken along the center line CL of the spout cap BC shown in FIG. In FIG. 2, the direction along the center line CL shown in FIG. 1 is the y-axis direction, and the horizontal direction perpendicular to the y-axis and along the paper surface is the x-axis direction.

  As shown in FIG. 2, the spout cap BC includes a first cylinder part 10 (main body part), a second cylinder part 20, a pressure reducing part 30 (a pressure reducing plate, a mixing rate adjusting part), and an upper reduced diameter part. 40, packing 50, spring 60, lower reduced diameter portion 70, and rectifying portion 80.

  The first cylindrical portion 10 is a substantially cylindrical member, and a second cylindrical portion 20, a pressure reducing portion 30, an upper reduced diameter portion 40, a packing 50, and a spring 60 are provided inside the cylindrical shape. It functions as a main body part. A mounting screw portion 103 is provided on the upper end side (the negative end side in the y-axis direction) of the first cylindrical portion 10 in the figure. The attachment screw portion 103 is a female screw for attaching the spout cap BC to the spout of the spout portion B2. Below the mounting screw portion 103 (in the positive direction in the y-axis direction), the packing 50 is provided in an annular shape along the inner wall of the first tube portion 10. The packing 50 is a close contact member for preventing water leakage when the water outlet cap BC is attached to the water outlet of the spout part B2.

  When the mounting screw portion 103 of the first tube portion 10 is screwed and attached to the male screw of the spout port of the spout portion B2, the water Wa supplied from the faucet device FC is supplied from the inflow port 101. The water Wa that has entered the first tube portion 10 as the main body portion from the inflow port 101 has an internal flow path (details will be described later, but the second tube portion 20, the pressure reducing portion 30, the upper reduced diameter portion 40, the lower reduced diameter portion). Through the section 70 and the flow path passing through the rectifying section 80, the water is mixed with bubbles or rectified water (water substantially free of bubbles) and discharged from the discharge port 102 to the outside (bowl section). Water Wb.

  The upper reduced diameter portion 40 is disposed on the downstream side of the packing 50 (the discharge port 102 side, the positive direction in the y-axis direction). The upper narrowed portion 40 includes an annular collar 401 that forms an outer periphery in the shape of a hat collar, and an annular protrusion 402 that is surrounded by the collar 401 and formed in a region including the center.

  The annular convex portion 402 is formed so as to protrude upstream from the flange portion 401 (inlet 101 side, negative direction in the y-axis direction). An inflow hole 403 is formed in a region including the center of the annular protrusion 402. A protrusion that contacts the pressure reducing plate 301 of the pressure reducing portion 30 is formed inside the inflow hole 403, and the upper reduced diameter portion 40 is fixed by this contact. The water that has entered from the inflow port 101 hits the upper narrowed diameter portion 40, whereby the pressure fluctuation of the water is attenuated and flows out from the inflow hole 403 to the downstream side. The water flowing out from the inflow hole 403 to the downstream side flows into the water reservoir 404 formed between the upper throttle part 40 and the pressure reducing part 30.

  The decompression unit 30 is disposed on the downstream side of the upper reduced diameter portion 40. The decompression unit 30 includes a decompression plate 301 and a mixing rate adjustment unit 302.

  The decompression plate 301 is a circular plate member. A plurality of injection holes 304 functioning as orifices are formed in the decompression plate 301 so as to form an annular shape. The plurality of injection holes 304 are formed at positions corresponding to the water reservoir 404. Accordingly, the plurality of injection holes 304 are provided so as not to be blocked by the flange portion 401 of the upper reduced diameter portion 40.

  A recess 303 is provided in a region including the center of the decompression plate 301. The recess 303 is formed on the upstream surface of the decompression plate 301. Accordingly, the water flowing out from the inflow hole 403 of the upper narrowed diameter portion 40 is concentrated and centered by the concave portion 303, spreads in the outer peripheral direction, and is ejected downstream from the plurality of ejection holes 304.

  A mixing rate adjusting unit 302 is provided on the downstream side of the decompression plate 301. The mixing rate adjustment unit 302 is configured to be able to move up and down (advancing and retreating along the y-axis direction), and closes an air hole 204 (opening) to be described later along with the vertical movement. Act to open or open. If attention is paid to this action, the mixing rate adjusting unit 302 functions to adjust the amount of air introduced into the internal flow path and adjust the mixing rate of bubbles into the bubble mixed water.

  A second cylinder portion 20 is provided between the upper reduced diameter portion 40 and the decompression portion 30 and the first cylinder portion 10. The second cylinder part 20 includes an upstream first guide part 201 and a downstream second guide part 205.

  An outer protrusion 202 is provided at the upper end of the first guide portion 201 (the end portion on the inflow port 101 side, the end portion in the negative direction in the y-axis direction) so as to protrude toward the first tube portion 10 side. . The outer protrusion 202 is engaged with the engagement protrusion 104 provided on the inner side of the first cylinder part 10, whereby the second cylinder part 20 is positioned and held at a predetermined position with respect to the first cylinder part 10. It is formed as follows.

  Inside the first guide part 201, the outer periphery of the mixing rate adjusting part 302 is arranged so as to contact. More specifically, the pressure receiving unit 306 of the mixing rate adjusting unit 302 is in contact with the inside of the first guide unit 201. The mixing rate adjusting unit 302 is configured to move in the vertical direction as a whole when the pressure receiving unit 306 moves in the vertical direction (the direction along the y-axis) along the inner wall surface of the first guide unit 201. .

  An inner protrusion 203 is provided at the lower end of the first guide portion 201 (the end on the discharge port 102 side, the end in the positive direction in the y-axis direction) so as to protrude toward the internal flow path. The inner protrusion 203 is disposed so that the outer surface of the shielding wall 307 of the mixing rate adjusting unit 302 contacts. The shielding wall 307 is configured to move in the vertical direction (direction along the y-axis) while contacting the inner protrusion 203.

  Between the 1st guide part 201 and the 2nd guide part 205, the air hole 204 (opening part) which introduces air in an internal flow path is provided. The air holes 204 are provided so as to be scattered over the entire circumference of the second cylindrical portion 20 between the first guide portion 201 and the second guide portion 205. Since the air hole 204 is formed immediately below the inner projection 203 of the first guide portion 201, the air hole 204 is configured to be closed or opened by the movement of the shielding wall 307 described above.

  A space is provided between the first cylinder portion 10 and the second cylinder portion 20, and is formed as an air flow path 802. A space between the downstream end of the first cylindrical portion 10 and the downstream end of the second cylindrical portion 20 is open, and is formed as an air inlet 803. Air introduced from the air inlet 803 is introduced from the air hole 204 to the internal flow path through the air flow path 802.

  A lower reduced diameter portion 70 is disposed inside the second guide portion 205. The lower reduced diameter portion 70 is a cylindrical member provided with a reduced diameter tapered portion 701 and an enlarged diameter tapered portion 702. The reduced diameter taper portion 701 is provided on the upstream side of the enlarged diameter taper portion 702, and is formed so as to narrow the internal flow path from the upstream side toward the downstream side. The enlarged diameter taper portion 702 is provided on the downstream side of the reduced diameter taper portion 701, and is formed so as to widen the internal flow path from the upstream side toward the downstream side.

  An inclined surface 704 that is an inner side surface of the reduced diameter tapered portion 701 is formed at a position corresponding to the plurality of injection holes 304 of the decompression plate 301. Accordingly, water sprayed from the plurality of spray holes 304 of the decompression plate 301 strikes the inclined surface 704 and is directed inward.

  When water is supplied from the inflow port 101 and water is injected from the plurality of injection holes 304 of the decompression plate 301, the water accumulates from the downstream side, and a gas-liquid interface is formed at a position corresponding to the lower throttle portion 70. The Since the water flow directed by the inclined surface 704 enters the gas-liquid interface while entraining the air, the bubble mixed water is generated. Due to the action of the decompression plate 301, a negative pressure is generated between the decompression plate 301 and the lower reduced diameter portion 70, so that air is drawn from the air holes 204 and enters the gas-liquid interface together with water ejected from the plurality of ejection holes 304. To do. Due to the rush of water flow to the gas-liquid interface, the gas-liquid interface is disturbed and air bubbles are more likely to be mixed. Therefore, a region from the decompression plate 301 to the lower reduced diameter portion 70 is formed as the bubble mixing portion 703.

  The bubble mixed water generated by the bubble mixing unit 703 is rectified by the rectifying grid 801 of the rectifying unit 80 provided on the downstream side of the second guide unit 205 and discharged from the discharge port 102 to the outside.

  A spring 60 as an urging unit is disposed between the decompression unit 30 and the lower reduced diameter portion 70. The spring 60 is disposed so as to be wound around the outside of the reduced diameter taper portion 701 of the lower narrowed diameter portion 70 and is disposed so as to be wound around the inside of the mixing rate adjusting portion 302 of the decompression portion 30.

  Therefore, when water is supplied from the inflow port 101 and the water hits the pressure receiving portion 306 of the mixing rate adjusting unit 302 through the inflow hole 403 of the upper narrowed diameter portion 40, the mixing rate adjusting unit 302 moves from the upstream side to the downstream side. Receives force to be pushed down. Since the spring 60 is arranged to oppose this force, the movement of the shielding wall 307 does not move until the predetermined flow rate of water is supplied from the inflow port 101 (or the air hole 204 does not move even if it moves). It can be adjusted so as to move and shield the air hole 204 when water exceeding a predetermined flow rate is supplied from the inlet 101.

  Further, the pressure receiving unit 306 of the mixing rate adjusting unit 302 is configured to contact the pressure reducing plate 301. As described above, when water is supplied from the inflow port 101 and the water hits the pressure receiving portion 306 of the mixing rate adjusting unit 302 through the inflow hole 403 of the upper reduced diameter portion 40, the mixing rate adjusting unit 302 is moved from the upstream side. Receives force to be pushed down downstream. Therefore, the pressure receiving unit 306 does not move until a predetermined flow rate of water is supplied from the inflow port 101, but moves when water exceeding a predetermined flow rate is supplied from the inflow port 101, and the decompression plate 301. A bypass channel is formed between the pressure receiving portion 306 and the pressure receiving portion 306.

  The state in which the pressure receiving portion 306 moves in this manner is shown in an enlarged manner in FIG. FIG. 3 is an enlarged view of the vicinity of the portion A in FIG. As shown in FIG. 3, when water exceeding a predetermined flow rate is supplied from the inflow port 101, it moves to form a bypass channel 308 between the pressure reducing plate 301 and the pressure receiving unit 306. Since the water supplied from the inflow port 101 passes through the bypass passage 308 in addition to the passage through the injection hole 304, the speed of the water injected from the injection hole 304 is attenuated. Further, when water exceeding a predetermined flow rate is supplied from the inflow port 101, the shielding wall 307 moves and narrows the air hole 204. The mixing rate of bubbles in 703 can be adjusted.

  Using the water outlet cap BC described above, the bubble mixing rate when the flow rate of the water Wa supplied to the inflow port 101 is increased, and the bubbles when using the water discharge port cap in which the mixing rate adjusting unit 302 does not move FIG. 4 shows a comparison of the mixing rate. In FIG. 4, Example 1 uses a spout cap BC. In FIG. 4, the comparative example 1 uses what fixed the mixing rate adjustment part 302 of the spout cap BC so that it might not move. The bubble mixing rate in the present embodiment indicates the ratio of the sum of the volume of bubbles in the bubble-containing water to the volume of water in the bubble-containing water. Specifically, the bubble-containing water is separated into water and bubbles (air), and the respective volumes are measured and calculated.

  In Comparative Example 1, when the flow rate of the supplied water is increased, the bubble mixing rate is also increasing in proportion to the increment. On the other hand, in the first embodiment, the mixing rate adjusting unit 302 is configured not to move up to a predetermined flow rate (about 4.2 L / min). Therefore, when the flow rate of supplied water is increased, the increment is increased. The mixing rate of bubbles is increasing in proportion to. However, when the flow rate exceeds a predetermined flow rate (about 4.2 L / min), the mixing rate adjusting unit 302 starts to move downstream, so that the bubble mixing rate is gradually suppressed. Since the air hole 204 is blocked by the shielding wall 307 at a flow rate of about 5 L / min, the bubble mixing rate is remarkably suppressed.

  As described above, the spout cap BC (spouting device) of the present embodiment is a spouting device capable of discharging bubble-mixed water, and discharges from the discharge port 102 and the discharge port 102 for discharging water. The 1st cylinder part 10 as a main-body part in which the inflow port 101 for making the water to flow in from the water supply source and the internal flow path from the inflow port 101 to the discharge port 102 were formed is provided. The water outlet cap BC is further provided so as to block the internal flow path, and a decompression plate 301 formed with a plurality of injection holes 304 for injecting water flowing from the inflow port 101 toward the downstream side of the internal flow path, An air hole 204 for introducing air is formed in the internal flow path, and the air introduced from the air hole 204 is mixed with water jetted from the plurality of jet holes 304 to form bubble-mixed water and is formed in the discharge port 102. A bubble mixing unit 703 to be supplied and a mixing rate adjusting unit 302 that adjusts a mixing rate of bubbles mixed in the bubble mixing water in the bubble mixing unit 703 are provided.

  The bubble mixing unit 703 is configured to generate a negative pressure by water jetted from the plurality of jet holes 304 and to draw air from the air holes 204 by the action of the negative pressure. When the water flowing in from the inlet 101 exceeds a predetermined flow rate, the mixing rate adjusting unit 302 reduces the opening area of the air hole 204 and also makes a plurality of injection holes 304 through the path where water flows downstream from the decompression plate 301. In addition to the main flow path passing through, a bypass flow path 308 is formed. In this way, by reducing the air holes 204 and forming the bypass flow path 308, a composite adjustment operation is performed that suppresses an increase in the flow rate of water injected from the plurality of injection holes 304 and suppresses an increase in the mixing rate. It is configured as follows.

  In the spout cap BC according to the present embodiment, in the bubble mixing unit 703, the air introduced from the air holes 204 is mixed into the water jetted from the plurality of jet holes 304 to form the bubble mixed water and the discharge port 102. Therefore, it is possible to easily generate the bubble-containing water by using the ejector effect.

  Furthermore, since the mixing rate adjusting unit 302 is provided, it is possible to supply bubble mixed water having a high bubble mixing rate at the low flow rate stage. Therefore, it is possible to discharge water with a sense of volume even at a low flow rate stage, and it is possible to do dishwashing and hand washing with a small amount of water compared to water discharged without air bubbles, contributing to water saving and suppressing water splashing. You can also.

  The mixing rate adjusting unit 302 can maintain the bubble mixing rate or reduce the bubble mixing rate according to the amount of water flowing in from the inlet. Therefore, even if the setting is made to raise the bubble mixing rate to the limit at the low flow rate stage, the increase in the bubble mixing rate is suppressed with the increase in the flow rate from there, and the optimum in the region where the predetermined flow rate is exceeded. Mixing rate can be achieved. Therefore, as a result of the user's operation to increase the flow rate according to his / her sense, a total amount of bubble-containing water (corresponding to the actual amount of water and the amount of bubbles) that feels that the amount of water intended by the user has been greatly exceeded is discharged. This can be avoided (see FIG. 4).

  Furthermore, in this embodiment, in order to reliably control the mixing rate of bubbles into the water discharge, the mixing rate adjustment unit 302 is configured to execute a composite adjustment operation. Specifically, the mixing rate adjusting unit 302 reduces the opening area of the air holes 204 when the water flowing in from the inlet 101 exceeds a predetermined flow rate, and also provides a path through which water flows downstream from the decompression plate 301. In addition to the main flow path passing through the plurality of injection holes 304, the bypass flow path 308 is also formed to pass therethrough. By configuring in this way, in addition to limiting the amount of air supplied, it is possible to suppress an increase in the flow rate of water injected from the plurality of injection holes 304 and to suppress an increase in the mixing rate by a synergistic effect. be able to.

  As described above, according to the present embodiment, the user does not need to finely adjust the amount of discharged water or manually adjust the amount of air introduced, and is optimal in both the low flow rate stage and the high flow rate stage. It is possible to enjoy water discharge with a bubble mixing rate. Therefore, even if the user adjusts the flow rate in the same way as a conventional water discharge device, it is possible to discharge the bubble mixed water with an increased bubble mixing rate at the low flow rate stage, and the user intends at the high flow rate stage. Therefore, it is possible to prevent the total amount of bubble-containing water from being discharged so as to feel that the amount of water greatly exceeded.

  In addition, in the spout cap BC according to the present embodiment, the mixing rate adjusting unit 302 has a pressure difference between the upstream water pressure in the internal channel relative to the decompression plate 301 and the downstream water pressure in the internal channel relative to the decompression plate 301. Is configured to move freely along the main direction (y-axis direction) from the inflow port 101 to the discharge port 102, and is configured to execute a composite adjustment operation when the pressure difference exceeds a threshold pressure. ing.

  As described above, the composite adjustment operation is performed when the pressure difference between the upstream water pressure and the downstream water pressure exceeds the threshold pressure with the decompression plate 301 interposed therebetween, and therefore flows in from the inflow port 101. Without providing a means for directly measuring the amount of water, the complex adjustment operation can be performed with a simple configuration (balance between the spring 60 and the water pressure) in which the mixing rate adjustment unit 302 is operated by water pressure. Therefore, with a small and simple configuration, it is possible to discharge the bubble-containing water with an increased bubble mixing rate at the low flow rate stage, and the total amount that the user feels greatly exceeds the amount of water intended by the user at the high flow rate stage. It is possible to prevent the bubble mixed water from being discharged.

  In the present embodiment, the upper throttle portion 40 is provided upstream of the decompression plate 301 in the internal flow path in order to increase the pressure loss. Therefore, the increase in the flow velocity of the water discharged from the discharge port 102 is increased. It can be reliably reduced by the portion 40.

  Moreover, in this embodiment, it is comprised so that the water which passes the bypass flow path 308 may interfere with the water which passes the some injection hole 304 (refer FIG. 3). In this way, by causing the water passing through the bypass passage 308 to interfere with the water passing through the plurality of injection holes 304, the flow rate of water passing through the plurality of injection holes 304 can be reduced. Therefore, the water passing through the bypass channel 308 can be used effectively, and even if the number of bypass channels 308 is reduced, the flow rate of water passing through the plurality of injection holes 304 can be reliably reduced.

  In the spout cap BC described above, the water that has passed through the bypass channel 308 merges into the water jetted from the plurality of jet holes 304 so as to enter from the side, but has passed through the bypass channel 308. It is also preferable that the water merges along the water ejected from the plurality of ejection holes 304. FIG. 5 shows a modification in which the bypass channel 308 is devised in this way.

  The water discharge cap BCa shown in FIG. 5 is obtained by replacing the pressure reducing plate 301 and the mixing rate adjusting unit 302 of the water discharging port cap BC with a pressure reducing plate 301a and a mixing rate adjusting unit 302a. The pressure receiving portion 306a of the mixing rate adjusting portion 302a is formed with a protrusion 306aa directed toward the pressure reducing plate 301a. The decompression plate 301a is formed with a recess 301aa into which the protrusion 306aa enters. FIG. 6 shows an enlarged view of a portion B where the recess 301aa and the protrusion 306aa are formed.

  As shown in FIG. 6, the bypass flow path 308a formed by the recess 301aa and the protrusion 306aa has an intricate shape. In a state where the decompression plate 301a and the mixing rate adjustment unit 302a are in contact with each other, the projection 306aa completely enters the recess 301aa. Therefore, even if a minute gap is formed between the decompression plate 301a and the mixing rate adjusting unit 302a, the water passing through the bypass channel 308a is directed to the projection 306aa and the recess 301aa and is discharged from the injection hole 304. It flows to the downstream side along with the water to be jetted. Therefore, even if a small amount of water is supplied from the inflow port 101 and a minute gap is formed between the pressure reducing plate 301a and the mixing rate adjusting unit 302a due to an instantaneous flow rate fluctuation or the like, the bypass is performed. The water passing through the flow path 308a can be configured not to decelerate the water jetted from the jet hole 304.

  In the spout cap BC and the spout cap BCa described above, when the mixing rate adjusting units 302 and 302a advance and retreat along the y-axis direction, the rate of change in the cross-sectional area of the bypass flow passages 308 and 308a and the air holes The change rate of the opening area 204 is the same. In order to further improve the performance, when the mixing rate adjusting units 302 and 302a advance and retract along the y-axis direction, the flow rates of the bypass channels 308 and 308a with respect to the rate of change of the opening area of the air hole 204 are reduced. It is preferable to suppress the rate of change of the road cross-sectional area. A modification of this preferred embodiment is shown in FIG.

  The water outlet cap BCb shown in FIG. 7 is obtained by replacing the pressure reducing plate 301 and the mixing rate adjusting unit 302 of the water discharging port cap BC with a pressure reducing plate 301b and a mixing rate adjusting unit 302b. The pressure receiving portion 306b of the mixing rate adjusting portion 302b is formed with a protrusion 306ba facing the pressure reducing plate 301b. The decompression plate 301b is formed with a recess 301ba into which the protrusion 306ba enters. FIG. 8 shows an enlarged view of a C portion where the recess 301ba and the protrusion 306ba are formed.

  As shown in FIG. 8, the protrusions 306ba are formed to be inclined inward with respect to the y-axis direction, which is the main direction in which the mixing rate adjustment unit 302b moves. The inner wall of the recess 301ba into which the projection 306ba enters, and the inner wall facing the projection 306ba is inclined along the side wall of the projection 306ba. Therefore, the bypass flow path 308b formed by the recess 301ba and the protrusion 306ba has an intricate shape. In a state where the decompression plate 301b and the mixing rate adjustment unit 302b are in contact with each other, the protrusion 306ba completely enters the recess 301ba. Therefore, even if a minute gap is formed between the decompression plate 301b and the mixing rate adjustment unit 302b, the water passing through the bypass flow path 308b is directed to the projection 306ba and the recess 301ba and from the injection hole 304. It flows to the downstream side along with the water to be jetted. Therefore, even if a small amount of water is supplied from the inlet 101 and a minute gap is formed between the pressure reducing plate 301b and the mixing rate adjusting unit 302b due to an instantaneous flow rate fluctuation or the like, the bypass is performed. The water passing through the flow path 308b can be configured not to decelerate the water jetted from the jet hole 304.

  Further, the portion where the projection 306ba and the recess 301ba, which are the portions forming the minimum flow path cross-sectional area along the bypass flow path 308b, are opposed to the inclined wall surface extending in the oblique direction intersecting the y-axis direction, which is the main direction, and the oblique wall thereof. It is formed with the opposing wall surface formed facing a wall surface. In the present embodiment, both the inner wall of the recess 301ba and the side wall of the protrusion 306ba are configured to be inclined walls. However, if one wall is formed obliquely, the other is not necessarily formed obliquely. You don't have to. With this configuration, the protrusion 306ba and the recess 301ba are moved forward and backward along the y-axis direction, which is the main direction, with the inclined wall surface and the opposing wall surface, thereby increasing or decreasing the minimum channel cross-sectional area of the bypass channel 308b. It is something to be made.

  Thus, the side wall of the protrusion 306ba as an oblique wall surface extending in the oblique direction intersecting with the y-axis direction which is the main direction, and the inner wall of the recess 301ba are formed as the opposite wall surface facing the side wall of the protrusion 306ba, and the protrusion Since the minimum channel cross-sectional area is increased or decreased by advancing and retracting the side wall of 306ba and the inner wall of the recess 301ba along the y-axis direction, which is the main direction, the movement amount (stroke amount) of the mixing rate adjusting unit 302b in the main direction ), The increase / decrease amount of the minimum channel cross-sectional area can be reduced. Thus, with a simple configuration in which the inclined wall surface and the opposing wall surface are formed, the adjustment range of the air introduction amount can be ensured without increasing the minimum channel cross-sectional area of the bypass channel 308b more than necessary.

  In other words, in the composite adjustment operation, the mixing rate adjusting unit 302b is configured such that the change rate of the minimum channel cross-sectional area along the bypass channel 308b is smaller than the rate of change of the opening area of the air hole 204 that is the opening. It is comprised so that it may adjust to.

  As described above, in the present embodiment, the composite adjustment operation is performed when the pressure difference between the upstream water pressure and the downstream water pressure exceeds the threshold pressure with the decompression plate 301b interposed therebetween. On the other hand, if the minimum flow cross-sectional area of the bypass flow path 308b is excessively increased to increase the ratio of the amount of water flowing to the bypass flow path 308b, the mixing rate adjustment unit 302b that is a driving force source of the mixing rate adjustment unit 302b. There is a risk that the pressure difference around it will decrease more than necessary. On the other hand, it is necessary to secure a sufficient adjustment width of the air introduction amount in order to form water discharge with an appropriate mixing ratio of bubbles. Therefore, in the composite adjustment operation, the mixing rate adjustment is performed by adjusting the change rate of the minimum channel cross-sectional area along the bypass channel 308b to be smaller than the rate of change of the opening area of the air hole 204 as the opening. When the portion 302b advances and retreats along the y-axis direction which is the main direction, the amount of air passing through the air hole 204 is secured while suppressing a change in the minimum flow path cross-sectional area of the bypass flow path 308b. By configuring in this way, it is possible to ensure the adjustment range of the air introduction amount without increasing the minimum flow path cross-sectional area of the bypass flow path 308b more than necessary.

  Thus, as another aspect which can ensure the adjustment width | variety of the introduction amount of air, without increasing the minimum flow-path cross-sectional area of the bypass flow path 308b more than necessary, the spout cap BCc which concerns on 2nd embodiment as another aspect. Will be described with reference to FIGS. FIG. 9 is a cross-sectional view showing a spout cap BCc according to the second embodiment of the present invention. FIG. 10 is a cross-sectional view showing the spout cap BCc. FIG. 11 is an enlarged cross-sectional view of FIG. FIG. 12 is a diagram illustrating a state in which the mixing rate adjustment unit has further moved from the state of FIG. 11.

  As shown in FIG. 9, the spout cap BCc includes a first cylinder part 10 (main body part), a second cylinder part 20, a pressure reducing part 30 c (a pressure reducing plate, a mixing rate adjusting part), and an upper diameter reducing part. 40c (pressure loss means), packing 50, spring 60, lower reduced diameter portion 70, and rectifying portion 80 are provided.

  The first cylinder portion 10 is a substantially cylindrical member, and the second cylinder portion 20, the pressure reducing portion 30c, the upper reduced diameter portion 40c, the packing 50, and the spring 60 are provided inside the cylindrical shape. It functions as a main body part. A mounting screw portion 103 is provided on the upper end side (the negative end side in the y-axis direction) of the first cylindrical portion 10 in the figure. The attachment screw portion 103 is a female screw for attaching the spout cap BCc to the spout of the spout portion B2. Below the mounting screw portion 103 (in the positive direction in the y-axis direction), the packing 50 is provided in an annular shape along the inner wall of the first tube portion 10. The packing 50 is a close contact member for preventing water leakage when the water outlet cap BCc is attached to the water outlet of the spout portion B2.

  When the mounting screw portion 103 of the first tube portion 10 is screwed and attached to the male screw of the spout port of the spout portion B2, the water Wa supplied from the faucet device FC is supplied from the inflow port 101. The water Wa that has entered the first tube portion 10 as the main body portion from the inflow port 101 has an internal flow path (details will be described later, but the second tube portion 20, the pressure reducing portion 30c, the upper reduced diameter portion 40c, the lower reduced diameter portion). Through the section 70 and the flow path passing through the rectifying section 80, the water is mixed with bubbles or rectified water (water substantially free of bubbles) and discharged from the discharge port 102 to the outside (bowl section). Water Wb.

  The upper reduced diameter portion 40c is disposed on the downstream side of the packing 50 (the discharge port 102 side, the positive direction in the y-axis direction). The upper reduced diameter portion 40c includes an annular portion 402c having an inflow hole 403c formed at the center, an outer wall portion 405c extending in a cylindrical shape toward the decompression portion 30c on the outermost side of the annular portion 402c, and an outer wall portion 405c. Further, an inner wall portion 406c extending in a cylindrical shape is provided on the inner side of the decompression portion 30c. A bypass hole 401c is formed in the annular portion 402c between the outer wall portion 405c and the inner wall portion 406c.

  The outer wall portion 405c of the upper narrowed diameter portion 40c is disposed so as to be inscribed in the second cylindrical portion 20 and is configured to slide along the first guide portion 201 of the second cylindrical portion 20. The upper reduced diameter portion 40c can be lowered until the outer wall portion 405c comes into contact with the inner protrusion 203 of the second cylindrical portion 20. Thus, the space | interval between the pressure-reducing plates 301c can be narrowed by the upper reduced diameter portion 40c being lowered. Therefore, it is possible to increase only the pressure loss of the main flow path reaching the injection hole 304 formed in the decompression plate 301c, and to suppress an increase in the amount of water passing through the injection hole 304.

  The water entering from the inflow port 101 hits the upper narrowed diameter portion 40c, whereby the pressure fluctuation of the water is attenuated and flows out from the inflow hole 403c to the downstream side. The water flowing out from the inflow hole 403c to the downstream side flows into a water reservoir 404c formed between the upper reduced diameter portion 40c and the pressure reducing portion 30c. Part of the water that has entered from the inflow port 101 flows to the decompression unit 30c side through the bypass hole 401c described above.

  The decompression unit 30c is disposed on the downstream side of the upper reduced diameter portion 40c. The decompression unit 30c includes a decompression plate 301c and a mixing rate adjustment unit 302c.

  The decompression plate 301c is a circular plate member. A plurality of injection holes 304 functioning as orifices are formed in the decompression plate 301c so as to form an annular shape. The plurality of injection holes 304 are formed at positions corresponding to the water reservoir 404c.

  A recess 303 is provided in a region including the center of the decompression plate 301c. The recess 303 is formed on the upstream surface of the decompression plate 301c. Therefore, the water flowing out from the inflow hole 403c of the upper narrowed diameter portion 40c is gathered and centered by the concave portion 303, spreads in the outer peripheral direction, and is ejected from the plurality of ejection holes 304 to the downstream side.

  A mixing rate adjustment unit 302c is provided on the downstream side of the decompression plate 301c. The mixing rate adjusting unit 302c is configured to be able to move up and down (advancing and retreating along the y-axis direction), and closes an air hole 204 (opening) to be described later along with the vertical movement. Act to open or open. If attention is paid to this action, the mixing rate adjusting unit 302c functions to adjust the amount of air introduced into the internal flow path and to adjust the mixing rate of bubbles in the bubble mixed water. As described above, in the present embodiment, the space between the pressure reducing plate 301c is narrowed by lowering the upper restricting portion 40c, and the increase in the amount of water passing through the injection hole 304 is suppressed. Together with 302c, it functions as a mixing rate adjustment unit according to the present invention. By configuring in this way, it is possible to suppress the pressure drop through the injection hole 304, and it is possible to secure a larger stroke amount of the mixing rate adjusting unit 302c than in the first embodiment.

  A second cylinder portion 20 is provided between the upper reduced diameter portion 40 c and the decompression portion 30 c and the first cylinder portion 10. The second cylinder part 20 includes an upstream first guide part 201 and a downstream second guide part 205.

  An outer protrusion 202 is provided at the upper end of the first guide portion 201 (the end portion on the inflow port 101 side, the end portion in the negative direction in the y-axis direction) so as to protrude toward the first tube portion 10 side. . The outer protrusion 202 is engaged with the engagement protrusion 104 provided on the inner side of the first cylinder part 10, whereby the second cylinder part 20 is positioned and held at a predetermined position with respect to the first cylinder part 10. It is formed as follows.

  An inner protrusion 203 is provided at the lower end of the first guide portion 201 (the end on the discharge port 102 side, the end in the positive direction in the y-axis direction) so as to protrude toward the internal flow path. The inner protrusion 203 is disposed so that the outer surface of the shielding wall 307c of the mixing rate adjusting unit 302c contacts. The shielding wall 307c is configured to move in the vertical direction (direction along the y-axis) while contacting the inner protrusion 203.

  Between the 1st guide part 201 and the 2nd guide part 205, the air hole 204 (opening part) which introduces air in an internal flow path is provided. The air holes 204 are provided so as to be scattered over the entire circumference of the second cylindrical portion 20 between the first guide portion 201 and the second guide portion 205. Since the air hole 204 is formed immediately below the inner projection 203 of the first guide portion 201, the air hole 204 is configured to be closed or opened by the movement of the shielding wall 307c described above.

  A space is provided between the first cylinder portion 10 and the second cylinder portion 20, and is formed as an air flow path 802. A space between the downstream end of the first cylindrical portion 10 and the downstream end of the second cylindrical portion 20 is open, and is formed as an air inlet 803. Air introduced from the air inlet 803 is introduced from the air hole 204 to the internal flow path through the air flow path 802.

  A lower reduced diameter portion 70 is disposed inside the second guide portion 205. The lower reduced diameter portion 70 is a cylindrical member provided with a reduced diameter tapered portion 701 and an enlarged diameter tapered portion 702. The reduced diameter taper portion 701 is provided on the upstream side of the enlarged diameter taper portion 702, and is formed so as to narrow the internal flow path from the upstream side toward the downstream side. The enlarged diameter taper portion 702 is provided on the downstream side of the reduced diameter taper portion 701, and is formed so as to widen the internal flow path from the upstream side toward the downstream side.

  The inclined surface 704 that is the inner side surface of the reduced diameter tapered portion 701 is formed at a position corresponding to the plurality of injection holes 304 of the decompression plate 301c. Therefore, the water sprayed from the plurality of spray holes 304 of the decompression plate 301c strikes the inclined surface 704 and is directed inward.

  When water is supplied from the inflow port 101 and water is injected from the plurality of injection holes 304 of the decompression plate 301c, the water accumulates from the downstream side, and a gas-liquid interface is formed at a position corresponding to the lower throttle portion 70. The Since the water flow directed by the inclined surface 704 enters the gas-liquid interface while entraining the air, the bubble mixed water is generated. Due to the action of the pressure reducing plate 301c, a negative pressure is generated between the pressure reducing plate 301c and the lower narrowed diameter portion 70, so that air is drawn from the air hole 204 and enters the gas-liquid interface together with water jetted from the plurality of jet holes 304. To do. Due to the rush of water flow to the gas-liquid interface, the gas-liquid interface is disturbed and air bubbles are more likely to be mixed. Therefore, a region from the decompression plate 301c to the lower reduced diameter portion 70 is formed as the bubble mixing portion 703.

  The bubble mixed water generated by the bubble mixing unit 703 is rectified by the rectifying grid 801 of the rectifying unit 80 provided on the downstream side of the second guide unit 205 and discharged from the discharge port 102 to the outside.

  Between the decompression part 30c and the lower reduced diameter part 70, a spring 60 is disposed as a biasing means. The spring 60 is disposed so as to be wound around the outside of the reduced diameter tapered portion 701 of the lower narrowed diameter portion 70 and is also disposed so as to be wound inside the mixing rate adjusting portion 302c of the decompression portion 30c.

  Therefore, when water is supplied from the inflow port 101 and water hits the pressure receiving portion 306c of the mixing rate adjusting unit 302c through the inflow hole 403c of the upper narrowed diameter portion 40c, the mixing rate adjusting unit 302c moves from the upstream side to the downstream side. Receives force to be pushed down. Since the spring 60 is arranged so as to counteract this force, the movement of the shielding wall 307c does not move until the predetermined flow rate of water is supplied from the inflow port 101 (or the air hole 204 does not move even if it moves). It can be adjusted so as to move and shield the air hole 204 when water exceeding a predetermined flow rate is supplied from the inlet 101.

  The pressure receiving portion 306c of the mixing rate adjusting unit 302c includes a first protrusion 306ca (first portion) facing the pressure reducing plate 301c and a second protrusion 306cb (second second) connected to the first protrusion 306ca toward the pressure reducing plate 301c. Part) is formed. The decompression plate 301c is formed with a recess 301ca into which the first protrusion 306ca and the second protrusion 306cb enter.

  The first protrusion 306ca is formed to be inclined inward with respect to the y-axis direction, which is the main direction in which the mixing rate adjusting unit 302c moves. The second protruding portion 306cb is formed upright so as to be along the y-axis direction, which is the main direction in which the mixing rate adjusting portion 302c moves. The inner wall of the recess 301ca into which the first protrusion 306ca and the second protrusion 306cb enter, and the inner wall facing the first protrusion 306ca and the second protrusion 306cb is the main direction in which the mixing rate adjustment unit 302c moves. It is formed upright along the y-axis direction. Accordingly, the bypass channel 308c formed by the recess 301ca, the first protrusion 306ca, and the second protrusion 306cb has an intricate shape. In a state where the decompression plate 301c and the mixing rate adjustment unit 302c are in contact with each other, the first projection 306ca and the second projection 306cb completely enter the recess 301ca. Therefore, even if a minute gap is formed between the decompression plate 301c and the mixing rate adjusting unit 302c, the water passing through the bypass flow path 308c is supplied to the first projecting portion 306ca, the second projecting portion 306cb, and the recessed portion 301ca. Directed and flows downstream along the water jetted from the jet hole 304. Therefore, even when a small amount of water is supplied from the inflow port 101 and a minute gap is formed between the pressure reducing plate 301c and the mixing rate adjusting unit 302c due to an instantaneous flow rate fluctuation or the like, the bypass is performed. The water passing through the flow path 308c can be configured not to decelerate the water jetted from the jet hole 304.

  Furthermore, the portion where the first protrusion 306ca and the recess 301ca, which are the portions forming the minimum channel cross-sectional area in the bypass channel 308c, are opposed to each other, an inclined wall surface extending in an oblique direction intersecting the y-axis direction which is the main direction, It is formed by the opposing wall surface formed facing the oblique wall surface. In the case of the present embodiment, the inner wall of the recess 301ca is erected, and the side wall of the first protrusion 306ca is an inclined wall surface. If comprised in this way, the 1st projection part 306ca and the recessed part 301ca will advance and retreat along the y-axis direction which is a main direction as an inclined wall surface and an opposing wall surface, and increase the minimum flow path cross-sectional area of the bypass flow path 308c. Or to decrease.

  FIG. 10 shows a state where the mixing rate adjustment unit 302c is slightly lowered. As shown in FIG. 10, when the mixing rate adjusting unit 302c is lowered, a bypass channel 308c is formed between the first and second protrusions 306ca and 306cb and the recess 301ca. This state is shown enlarged in FIG. As shown in FIG. 11, while the lower end of the outer wall of the recess 301ca is opposed to the first projection 306ca, the minimum channel cross-sectional area of the bypass channel 308c is formed at that portion, and the mixing rate adjusting unit 302c It expands at a constant rate of change as it falls. Subsequently, when the lower end of the outer wall of the recess 301ca moves to a position facing the second protrusion 306cb, the minimum flow passage cross-sectional area of the bypass flow passage 308 is formed at that portion, and the mixing rate adjustment portion 302c is lowered. Maintain a constant cross-sectional area.

  When the mixing rate adjustment unit 302c is further lowered, the state shown in FIG. 12 is obtained. In the state shown in FIG. 12, the air hole 204 is almost completely blocked by the shielding wall 307 c, and air does not pass through the air hole 204. Further, the water passing through the bypass passage 308c from the bypass hole 401c continues to be supplied so as to interfere with the water injected through the injection hole 304.

  Thus, in the spout cap BCc, the portion that forms the minimum flow path cross-sectional area along the bypass flow path 308c serves as the first portion that changes the flow path cross-sectional area so that the rate of change of the flow path cross-sectional area is constant. It is configured by either a portion where the first protrusion 306ca is formed or a portion where the second protrusion 306cb is formed as a second portion configured so that the flow path cross-sectional area is not deformed. . The first portion is formed by a first protrusion 306ca having an oblique wall surface extending in an oblique direction intersecting with the y-axis direction, which is the main direction, and a recess 301ca having an opposite wall surface formed to face the oblique wall surface. It is comprised so that a flow-path cross-sectional area may increase or decrease, when a wall surface and an opposing wall surface advance and retreat along a main direction. Further, the second portion is formed by a second protrusion 306cb and a recess 301ca that are a pair of parallel wall surfaces extending along the y-axis that is the main direction, and the pair of parallel wall surfaces move along the main direction. The channel cross-sectional area is configured to be kept constant. With such a configuration, the widest channel cross-sectional area in the first portion is the same as the channel cross-sectional area in the second portion, and is configured to continuously change.

  Thus, by configuring the portion constituting the minimum channel cross-sectional area with either the first portion corresponding to the constant rate change region or the second portion corresponding to the non-change region, the inlet 101 It corresponds to a large fluctuation in the flow rate of inflowing water. Therefore, even if the amount of water flowing in from the inflow port 101 fluctuates with a simple configuration in which the first portion having the inclined wall surface and the opposing wall surface and the second portion having the pair of parallel wall surfaces are formed, the mixing rate adjustment is performed. The drive of the part 302c can be ensured.

  By adopting such a configuration in the spout cap BCc, the mixing rate adjustment unit 302c changes the opening area of the air hole 204 so that the rate of change is constant in the combined adjustment operation, The minimum channel cross-sectional area along the path 308c is changed so that a constant rate change region where the rate of change of the channel cross-sectional area is constant and a non-change region where the channel cross-sectional area does not change are continuous. It adjusts so that the amount of water passing does not exceed the threshold amount of water.

  The spout cap BCc is configured to perform the composite adjustment operation when the pressure difference between the upstream water pressure and the downstream water pressure exceeds the threshold pressure with the decompression plate 301c interposed therebetween. On the other hand, if the minimum channel cross-sectional area of the bypass channel 308c is excessively increased to increase the ratio of the amount of water flowing to the bypass channel 308c, the mixing rate that is the driving force source of the mixing rate adjusting unit 302c. There is a possibility that the pressure difference around the adjusting portion 302c may be reduced more than necessary. Therefore, as described above, the minimum flow path cross-sectional area along the bypass flow path 308c is changed so that the constant rate change area and the non-change area are continuous. With this configuration, even if the amount of water flowing from the inflow port 101 fluctuates significantly, a part of the fluctuation can be absorbed in the unchanged region, and the drive of the mixing rate adjusting unit 302c is ensured. Can do.

  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, sizes, and the like are not limited to those illustrated, but 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.

10: 1st cylinder part 20: 2nd cylinder part 30: Pressure reducing part 30c: Pressure reducing part 40: Upper diameter reducing part 40c: Upper diameter reducing part 50: Packing 60: Spring 70: Lower diameter reducing part 80: Rectification part 101: Inlet 102: Discharge port 103: Mounting screw part 104: Engagement protrusion 201: First guide part 202: Outer protrusion 203: Inner protrusion 204: Air hole 205: Second guide part 301: Decompression plate 301a: Decompression plate 301aa: Recess 301b: Decompression plate 301ba: Depression 301c: Decompression plate 301ca: Depression 302: Mixing rate adjusting unit 302a: Mixing rate adjusting unit 302b: Mixing rate adjusting unit 302c: Mixing rate adjusting unit 303: Recess 304: Injection hole 306: Pressure receiving unit 306a: pressure receiving portion 306aa: projection portion 306b: pressure receiving portion 306ba: projection portion 306c: pressure receiving portion 306ca: first projection portion 306cb: second projection portion 307: shielding wall 307 : Shielding wall 308: bypass channel 308a: bypass channel 308b: bypass channel 308c: bypass channel 401: flange 401c: bypass hole 402: annular projection 402c: annular portion 403: inflow hole 403c: inflow hole 404 : Reservoir part 404c: Reservoir part 405c: Outer wall part 406c: Inner wall part 701: Reduced diameter taper part 702: Expanded taper part 703: Bubble mixing part 704: Inclined surface 801: Rectification grid 802: Air flow path 803: Air Inlet B1: Standing part B2: Spout part BC: Water outlet cap BCa: Water outlet cap BCb: Water outlet cap BCc: Water outlet cap CL: Center line FC: Water faucet device HL: Water outlet handle

Claims (8)

A water discharger capable of discharging bubble-containing water,
A main body formed with a discharge port for discharging water, an inflow port for allowing water discharged from the discharge port to flow in from a water supply source, and an internal flow path from the inflow port to the discharge port; ,
A pressure reducing plate provided so as to block the internal flow path, and formed with a plurality of holes for injecting water flowing from the inlet toward the downstream side of the internal flow path;
An opening for introducing air is formed in the internal flow path, and the air introduced from the opening is mixed with water ejected from the plurality of holes to form bubble mixed water and supplied to the discharge port. A bubble mixing part,
A mixing rate adjusting unit that adjusts the mixing rate of bubbles mixed in the bubble mixed water in the bubble mixing unit,
The bubble mixing part is configured to generate a negative pressure by water sprayed from the plurality of holes, and to draw air from the opening by the action of the negative pressure,
The mixing rate adjustment unit
When the water flowing in from the inflow port exceeds a predetermined flow rate, the opening area of the opening is reduced, and a path leading to water downstream from the decompression plate is bypassed in addition to the main flow path passing through the plurality of holes. A water discharger configured to perform a combined adjustment operation that suppresses an increase in a flow rate of water ejected from the plurality of holes by forming a path and suppresses an increase in the mixing rate. The mixing rate adjustment unit
Due to the pressure difference between the upstream water pressure in the internal flow path from the pressure reducing plate and the downstream water pressure in the internal flow path from the pressure reducing plate, it advances and retreats along the main direction from the inlet to the discharge port. It is configured to move freely,
The water discharge device according to claim 1, wherein when the pressure difference exceeds a threshold pressure, the combined adjustment operation is executed.   The mixing rate adjusting unit adjusts the change rate of the minimum channel cross-sectional area along the bypass channel to be smaller than the rate of change of the opening area of the opening in the composite adjustment operation. The water discharging apparatus according to claim 2. The portion forming the minimum flow path cross-sectional area in the bypass flow path is formed by an oblique wall surface extending in an oblique direction intersecting with the main direction, and an opposed wall surface formed facing the oblique wall surface,
The water discharge device according to claim 3, wherein the slant wall surface and the opposing wall surface advance or retreat along the main direction to increase or decrease the minimum channel cross-sectional area. In the composite adjustment operation, the mixing rate adjustment unit changes the opening area of the opening so that the rate of change is constant,
The minimum flow path cross-sectional area along the bypass flow path is changed so that a constant rate change area where the change rate of the flow path cross-section area is constant and a non-change area where the flow path cross-section area does not change are continuous. It adjusts so that a road cross-sectional area may not exceed a threshold flow-path cross-sectional area, The water discharging apparatus of Claim 2 characterized by the above-mentioned. The portion that forms the minimum flow path cross-sectional area along the bypass flow path is the first part that changes the flow path cross-sectional area so that the change rate of the flow path cross-sectional area is constant, and the flow path cross-sectional area is not deformed. One of the configured second parts,
The first portion is formed by an inclined wall surface extending in an oblique direction intersecting with the main direction and an opposing wall surface formed to face the inclined wall surface, and the inclined wall surface and the opposing wall surface are along the main direction. By moving forward and backward, the flow passage cross-sectional area is configured to increase or decrease,
The second portion is formed by a pair of parallel wall surfaces extending along the main direction, and the pair of parallel wall surfaces move along the main direction so that the flow path cross-sectional area is kept constant. Is composed of
The water discharge device according to claim 5, wherein the widest channel cross-sectional area in the first portion is configured to be the same as the channel cross-sectional area in the second portion.   The said mixing rate adjustment part has a pressure loss means for raising the pressure loss of the said main flow path rather than the said bypass flow path in the upstream in the said internal flow path rather than the said pressure reduction plate. The water discharging apparatus according to any one of 3.   The water discharging apparatus according to claim 1, wherein water passing through the bypass channel interferes with water passing through the plurality of holes.