JP2012072594A - Foamy water discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foamy water discharge device which can discharge bubble-mixed water with an increased bubble-mixing rate in a low flow rate stage, and even in a high flow rate stage, suppresses increase in the flow velocity and prevents water splash and appearance deterioration or the like during its usage.SOLUTION: A foamy water discharge device comprises: an orifice part which jets the water that has flowed into a main body part towards the downstream side of an inner flow path while increasing flow velocity of the water; a bubble-mixing part 300 that mixes the water with air to make bubble-mixed water; and a rectifying part 400 that rectifies the bubble-mixed water and discharge the water through a discharge port 113. The orifice is placed so as to block the inner flow path and has a pressure-reducing plate with a number of holes. The bubble-mixing part 300 includes a slope part 320 of which the diameter reduces downward like a funnel so that the water jetted from the number of holes is directed to the center of the inner flow path. The rectifying part 400 includes a rectifying grid to rectify the bubble-mixed water, and among annular rectifying ribs 411, the most outside annular rectifying ribs 411 are placed in the inner diameter side of the line extended from the slope surface of the slope part 320.

Description

  The present invention relates to a foam water spouting device capable of discharging bubble-containing water.

  Conventionally, in order to reduce the sound of water landing on the sink or to suppress water splashing, a foam water spouting device that discharges water containing air bubbles mixed with air bubbles in water discharge has been used. Also, in recent years, due to the increasing tendency to conserve water, by increasing the bubble mixing rate from the low flow rate stage where the flow rate of discharged water is about 2 L / min, the amount of water discharged and the flow rate are increased, and the user can comfortably use while saving water. Also proposed is a foam water spouting device that improves the performance (Patent Documents 1 and 2).

  The foam water spouting device described in Patent Document 1 includes a foam water spouting port provided with an air mixing mechanism and a rectifying mechanism in this order from the upstream side in the course of a flow path extending between the washing water flow inlet and the bubble flow discharge port. , Provided at the tip of the faucet through a joint. The air mixing mechanism is a circle concentric with the bubble flow outlet and has a plurality of small holes arranged on the circumference of the circle having a diameter larger than that of the bubble flow outlet, and is arranged to block the flow path. It has a pressure reducing plate, an air hole formed in the flow passage wall downstream of the pressure reducing plate, and a backflow prevention unit disposed downstream of the air hole, and the rectifying mechanism is contracted in a funnel shape downstream of the backflow prevention unit. An inclined portion of a diameter channel, a rectifying portion of a flow channel concentric with the bubble flow discharge port extending from the downstream end of the inclined portion toward the bubble flow discharge port, and a flow channel connecting the inclined portion and the rectification portion R section, a rectifying grid disposed to block the rectifying section of the flow path, and a rectifying path connected to the rectifying section downstream of the rectifying grid, and the flow path cross-sectional area of the joint upstream of the decompression plate It is a foam water discharging apparatus characterized by providing the throttle part which has a smaller water flow path cross section.

  The foam spout described in Patent Document 2 includes a cleaning water inlet, a bubble flow outlet, and an air mixing mechanism disposed in the middle of the cleaning water passage extending between the cleaning water inlet and the bubble outlet. A rectifying mechanism disposed downstream of the air mixing mechanism, the air mixing mechanism including a decompression plate formed with a plurality of small holes and closing the cleaning water flow path, and a cleaning water flow downstream of the decompression plate An air hole formed in the passage wall and a taper portion of the washing water flow path having a diameter reduced in a funnel shape downstream from the decompression plate, and the rectifying mechanism is connected to the taper portion and connected to the downstream end of the taper portion And a rectifying part of the washing water flow channel extending between the bubble flow outlet and the rectifying grid disposed in the rectifying part, and the small hole of the decompression plate is directed to the peripheral wall of the tapered part It is a foam spout characterized by.

  In the foam spouting device described in Patent Document 1, when washing water passes through the small hole of the decompression plate, the pressure energy is converted into kinetic energy, and the jet flow from the small hole increases the flow velocity. The ejector effect of entraining the air is used for air mixing, and by allowing the washing water to be discharged from the plurality of small holes at a high speed, the bubble mixing rate can be increased from the low flow rate stage.

JP 2002-275969 A International Publication No. 01/068995 Pamphlet

  In the low-flow stage, the water containing bubbles is saved without increasing the mixing rate of bubbles, thereby reducing the sound of landing on the sink and suppressing water splashing. However, it is possible to increase the feeling of water discharge and the flow velocity, and to improve comfort. Therefore, in the foam water spouting device described in Patent Literature 1 and Patent Literature 2, a design contrivance is made to increase the bubble mixing rate in the low flow rate stage.

  However, actually, not only such a low flow rate stage but also a high flow rate stage may be used. If the water flow rate increases and the flow velocity of the jet from the small hole in the decompression plate increases too much, the water discharged from the bubble flow discharge port contracts, thereby increasing the flow rate of the bubble-containing water discharged from the bubble flow discharge port. In addition to causing problems such as splashing, the appearance also deteriorates. In particular, this phenomenon becomes more prominent at the high flow rate stage as the design is devised to increase the bubble mixing rate at the low flow rate stage.

  The present invention has been made in view of such a problem, while it is possible to discharge the bubble mixed water with an increased bubble mixing rate in the low flow rate stage, while suppressing an increase in the flow rate even in the high flow rate stage, An object of the present invention is to provide a foam water spouting device capable of preventing problems such as water splashing during use and deterioration of appearance.

  The present invention made to solve the above problems is a foam water spouting device capable of discharging water flowing in from an inflow port from a discharge port as bubble-mixed water, and an internal flow from the inflow port to the discharge port. A main body portion in which a passage is formed, an orifice portion for injecting water flowing in from the inlet toward the downstream side of the internal flow path at a higher flow velocity, and an air hole for introducing air into the internal flow path are formed. The air introduced from the air hole is mixed with the water jetted from the orifice part to make the air bubble mixed water, and the air bubble mixed part is disposed downstream of the air bubble mixed part, and the air bubble mixed water is rectified from the discharge port. The orifice portion is provided so as to block the internal flow path, and has a decompression plate in which a plurality of holes are formed, and the bubble mixing portion has water jetted from the plurality of holes. Towards the center of the internal flow path And the rectifying unit has a rectifying grid for rectifying the bubble mixed water generated in the bubble mixing unit, and the rectifying grid includes an annular rectifying rib and a radial rectifying unit. The annular rectifying rib disposed on the outermost diameter side among the annular rectifying ribs is disposed on the inner diameter side of the extended line of the inclined surface of the inclined portion. .

  According to this invention, in the bubble mixing part, the bubble mixed water is generated by utilizing the ejector effect that can effectively generate the bubble mixed water including fine bubbles even at the low flow rate stage. Therefore, without sacrificing the basic purpose of reducing the sound of landing on the sink or suppressing water splash, it is possible to improve the comfort by increasing the amount of water discharged and the flow velocity while saving water. .

  According to the present invention, the inclined portion contracts in a funnel shape toward the downstream side so that water sprayed from the plurality of holes is directed toward the center of the internal flow path in order to efficiently mix bubbles. It has a diameter. 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 bubbles, which can contribute to water saving and suppress water splashing. it can.

  Further, among the annular rectifying ribs, the annular rectifying rib disposed on the outermost diameter side is disposed closer to the inner diameter side than the extended line of the inclined surface of the inclined portion, so that the diameter of the rectifying portion passes through the inclined portion. Opposes the inward flow and acts as a flow resistance. Therefore, it is possible to guide to the discharge port in the radially outward direction while decelerating the flow of the bubble mixed water. Therefore, it is possible to prevent the bubbling water discharged from the discharge port from contracting even at a high flow rate stage and to suppress an increase in the flow velocity. Therefore, it is possible to prevent problems such as water splashing and appearance deterioration during use at the high flow rate stage.

  Furthermore, as the diameter of the discharge port is designed to be larger than the inner diameter of the inclined portion, the bubble-mixed water is less likely to be supplied to the water discharge port in the radially outward direction, so that the water discharge phenomenon tends to occur. However, there are many cases where the diameter of the discharge port has to be made larger than the inner diameter of the inclined portion due to the design or design reasons. Therefore, as in the present invention, the flow is slowed down by arranging the flow straightening rib disposed on the outermost diameter side among the circular flow straightening ribs on the inner diameter side from the extended line of the inclined surface of the inclined portion. However, if guided to the outer diameter direction, it is possible to prevent the bubbling water discharged from the discharge port from constricting even at a high flow rate stage and to suppress the increase of the flow velocity. The effect to prevent is great.

  As described above, according to the present invention, it is possible to discharge the bubble-containing water with an increased bubble mixing rate at the low flow rate stage, while preventing the contraction of the bubble-containing water discharged even at the high flow rate stage. In addition, it is possible to provide a water discharging device that can suppress an increase in flow velocity and prevent problems such as water splashing during use and deterioration of appearance.

  Further, in the foam spouting device according to the present invention, the rectifying grid has a plurality of openings partitioned by an annular rectifying rib and a radial rectifying rib, and is arranged on the outermost diameter side. The plurality of openings disposed in the radially outward direction from the rib are formed in a flat shape in the radially outward direction.

  According to the present invention, the plurality of openings disposed in the radially outer direction than the annular rib disposed on the outermost diameter side are formed in a flat shape in the radially outward direction, thereby causing a flow in the radial direction. The speed distribution is more uniform, the rectifying effect is increased, and the appearance of water discharge is further improved. This action can suppress the phenomenon in which bubble-containing water is discharged toward the inner diameter side of the discharge port, thereby preventing the bubble-containing water from constricting from the discharge port even at a high flow rate stage and further increasing the flow velocity. Can be suppressed.

  Moreover, the foam spouting device according to the present invention is characterized in that the opening ratio in the radially outer direction is larger than the opening ratio in the radially inner direction than the annular rectifying rib disposed on the outermost diameter side.

  According to the present invention, the pressure loss of the opening portion in the radially inner direction is made larger than that in the radially outer direction than the annular rectifying rib disposed on the outermost diameter side, so that the bubble mixed water enters the opening portion on the outer diameter side. By facilitating the flow, it is possible to suppress the phenomenon in which bubble-containing water is discharged toward the inner diameter side of the discharge port, thereby preventing the bubble-containing water from constricting from the discharge port even at a high flow rate stage and increasing the flow velocity. Can be further suppressed.

  According to the present invention, it is possible to discharge the bubble-containing water with an increased bubble mixing rate at the low flow rate stage, while preventing the condensate of the bubble-containing water discharged even at the high flow rate stage and increasing the flow velocity. Can be suppressed. Therefore, it is possible to provide a water discharging device that can prevent problems such as water splashing and appearance deterioration.

It is a cross-sectional schematic diagram showing the foam water discharging apparatus concerning embodiment of this invention. It is a cross-sectional schematic diagram for demonstrating the principle of foam water spouting. It is a cross-sectional schematic diagram showing the flow of the bubble mixed water of this embodiment. Cross-sectional schematic diagram showing the flow of bubble-containing water of this embodiment The cross-sectional schematic diagram for demonstrating the mode of the flow of the water in the foam water spouting apparatus of this invention. It is a cross-sectional schematic diagram for demonstrating the mode of the flow of the water of a comparative example. It is sectional drawing of the rectification | straightening part of the foam spouting apparatus of this invention. It is sectional drawing of the rectification | straightening part of the foam spouting apparatus of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.

The water discharging apparatus which is embodiment of this invention is demonstrated referring FIG.
FIG. 1 is a schematic cross-sectional view showing a foam water spouting device according to an embodiment of the present invention.
Moreover, it demonstrates, referring also to FIG. 2 and FIG. 3 as needed.
FIG. 2 is a schematic cross-sectional view for explaining the principle of foam water discharge.
3 and 4 are schematic cross-sectional views showing the flow of bubble-containing water according to this embodiment.
3 and 4 are enlarged schematic views in which the area A shown in FIG. 2 is enlarged and viewed.

  As shown in FIG. 1, the foam spouting device 100 of the present invention includes a main body 110 having an inflow port 111 and a discharge port 113, an orifice unit 200, a bubble mixing unit 300, and a rectifying unit 400. Yes. An upper reduced diameter portion 150 is provided on the upstream side of the orifice portion 200. The water that has flowed into the inlet 111 from the water supply source passes through the internal flow path and becomes bubble mixed water and is discharged from the discharge port 113. In the internal flow path, water passes through the upper reduced diameter portion 150, the orifice portion 200, the bubble mixing portion 300, and the rectifying portion 400 in this order.

  The upper narrowed diameter portion 150 includes an annular convex portion 151 and a flange portion 153, and the annular convex portion 151 is formed so as to protrude upstream from the flange portion 153. An inflow hole 155 is formed in a region including the center of the annular convex portion 151. The water that has entered from the inflow port 111 hits the upper narrowed diameter portion 150 to attenuate the water pressure, and flows out from the inflow hole 155 to the downstream side. The water flowing out from the inflow hole 155 to the downstream side flows into the orifice unit 200.

  The orifice portion 200 is disposed on the downstream side of the upper reduced diameter portion 150 and has a pressure reducing plate 210.

  The decompression plate 210 is a circular plate member. The decompression plate 210 is formed so that the plurality of holes 211 draw an annular shape and are not blocked by the flange portion 153 of the upper reduced diameter portion 150.

  As shown in FIG. 2, the water that has flowed into the orifice unit 200 is jetted from the plurality of holes 211 to the downstream bubble mixing unit 300 at an angle that spreads in the outer circumferential direction.

  The bubble mixing part 300 is disposed on the downstream side of the orifice part 200 and includes an air introduction path 310 and an inclined part 320. An air hole 311 is formed at the end of the air introduction path 310 to introduce the air guided to the air introduction path 310 into the internal flow path.

  The inclined portion 320 is a cylindrical member having a diameter reduced to a funnel shape toward the downstream side. As shown in FIG. 2, the water sprayed from the plurality of holes 211 collides with the upstream surface of the inclined portion 320, and is guided to the outer diameter side along the wall surface of the inclined portion 320 whose diameter has been expanded. While being divided into water guided toward the center of the internal flow path, the water is uniformly dispersed throughout the internal flow path.

  At this time, when the water flows in from the inlet 111, the inside of the bubble mixing part 300 becomes negative pressure due to the action of the water jetted from the plurality of holes 211, so that air is introduced from the air introduction path 310 into the internal flow path. It is burned.

  As shown in FIG. 2, the water guided by the inclined portion 320 so as to be uniformly dispersed throughout the internal flow path flows into the rectifying unit 400.

  The rectifying unit 400 is disposed on the downstream side of the inclined unit 320 and has a rectifying grid.

  The rectifying grid is a member having a plurality of openings 410 divided by annular rectifying ribs and radial rectifying ribs. This rectifying grid serves as a flow resistance, and the water flowing from the upstream side is decelerated, so that the water is apparently accumulated on the upstream surface side of the rectifying unit 400 and a gas-liquid interface is formed.

  The water that has been guided by the inclined portion 320 so as to be uniformly dispersed throughout the internal flow path and has flowed into the rectifying portion 400 enters the gas-liquid interface. At this time, the air guided from the air introduction path 310 into the internal flow path is drawn into the water as bubbles due to viscosity, and bubble mixed water is generated.

  The bubble mixed water generated by the bubble mixing unit 300 and the upstream surface side of the rectifying unit 400 is rectified by the rectifying grid of the rectifying unit 400 and discharged from the discharge port 113.

Next, efficient bubble mixing and inefficient bubble mixing will be described with reference to the drawings.
3 and 4 schematically show a state in which water that has flowed into the internal flow path from the orifice unit 200 flows into the rectifying unit 400. FIG. 3 is a schematic cross-sectional view showing the flow of bubble-containing water according to this embodiment in which bubbles can be efficiently mixed. Moreover, FIG. 4 is a cross-sectional schematic diagram showing the flow of the bubble-containing water of the comparative example that results in inefficient bubble mixing.

  In the present embodiment, more efficient air mixing can be performed by forming the gas-liquid interface on the entire upstream surface side of the rectifying unit 400.

  As shown in FIG. 3, the water jetted from the plurality of holes 211 to the downstream bubble mixing part 300 collides with the upstream surface of the inclined part 320 and is uniformly dispersed throughout the internal flow path. It is desirable to be guided to.

  FIG. 3 shows that water sprayed from the plurality of holes 211 to the downstream bubble mixing unit 300 collides with the upstream surface of the inclined unit 320, is uniformly dispersed throughout the internal flow path, and flows into the rectifying unit 400. Therefore, a gas-liquid interface is formed on the entire upstream surface side of the rectifying unit 400.

When the gas-liquid interface is formed on the entire upstream surface side of the rectifying unit 400, the air guided from the air introduction path 310 into the internal flow path has no flow path other than being discharged from the discharge port 113 together with water. ,
It is possible to prevent air from flowing out while being separated without being mixed into water.
Therefore, the air guided from the air introduction path 310 into the internal flow path is surely drawn into the water as bubbles, and efficient bubble mixing can be performed.

On the other hand, as shown in FIG. 4, the water jetted from the plurality of holes 211 to the downstream bubble mixing part 300 collides with the upstream surface of the inclined part 320, and the inner diameter side or outer diameter of the internal channel. If it is biased to the side, efficient bubble mixing cannot be performed.

  FIG. 4A shows that the water jetted from the plurality of holes 211 to the downstream bubble mixing part 300 collides with the upstream surface of the inclined part 320 and is biased toward the inner diameter side of the internal flow path 400. Therefore, the gas-liquid interface is formed only on the inner diameter side on the upstream surface side of the rectifying unit 400.

If the gas-liquid interface is formed only on the inner diameter side on the upstream surface side of the rectification unit 400, the air guided from the air introduction path 310 into the internal flow path is the outer diameter side where the gas-liquid interface is not formed in the flow path. Therefore, it flows out with separation without mixing in water.
For this reason, only part of the air guided from the air introduction path 310 into the internal flow path can be drawn into the water, so that the efficiency of mixing bubbles deteriorates.

  FIG. 4B shows that water jetted from the plurality of holes 211 to the downstream bubble mixing part 300 collides with the upstream surface of the inclined part 320 and is biased toward the outer diameter side of the internal channel. Since it flows into the rectifying unit 400, a gas-liquid interface is formed only on the outer diameter side on the upstream surface side of the rectifying unit 400.

If the gas-liquid interface is formed only on the outer diameter side on the upstream surface side of the rectifying unit 400, the air guided from the air introduction path 310 into the internal flow path has the inner diameter on the upstream surface side where the gas-liquid interface is not formed. Since the side becomes a flow path, it flows out with separation without mixing in water.
For this reason, only part of the air guided from the air introduction path 310 into the internal flow path can be drawn into the water, so that the efficiency of mixing bubbles deteriorates.

Next, generation | occurrence | production of the contraction flow of bubble mixing water and the raise of the flow velocity are demonstrated, referring drawings.
3 and 4 schematically show a state in which water that has flowed into the internal flow path from the orifice unit 200 flows into the rectifying unit 400.
FIG. 3 is a schematic cross-sectional view showing the flow of bubble-mixed water according to this embodiment that can suppress the occurrence of contracted flow of bubble-mixed water and the increase in flow velocity.
FIG. 4 is a schematic cross-sectional view showing the flow of bubble-containing water of a comparative example in which generation of contracted flow of bubble-containing water and increase in flow velocity occur.

  As shown in FIG. 3, the water jetted from the plurality of holes 211 to the downstream bubble mixing part 300 collides with the upstream surface of the inclined part 320 and is uniformly dispersed throughout the internal flow path. It is desirable to be guided to.

  FIG. 3 shows that water sprayed from the plurality of holes 211 to the downstream bubble mixing unit 300 collides with the upstream surface of the inclined unit 320, is uniformly dispersed throughout the internal flow path, and flows into the rectifying unit 400. Therefore, a gas-liquid interface is formed on the entire upstream surface side of the rectifying unit 400.

  When the gas-liquid interface is formed on the entire upstream surface side of the rectifying unit 400, the generated bubble-mixed water is discharged from the entire surface of the discharge port 113, so that the condensate of the discharged water and the increase in the flow velocity do not occur. Therefore, it is possible to provide a water discharging device that can prevent problems such as water splashing and appearance deterioration.

  On the other hand, as shown in FIG. 4A, if the water jetted from the plurality of holes 211 to the downstream bubble mixing part 300 is biased toward the inner diameter side of the internal flow path, The increase cannot be suppressed.

  FIG. 4A shows that the water jetted from the plurality of holes 211 to the downstream bubble mixing part 300 collides with the upstream surface of the inclined part 320 and is biased toward the inner diameter side of the internal flow path 400. Therefore, the gas-liquid interface is formed only on the inner diameter side on the upstream surface side of the rectifying unit 400.

  If the gas-liquid interface is formed only on the inner diameter side on the upstream surface side of the rectifying unit 400, the generated bubble-mixed water is not discharged from the entire surface of the discharge port 113, and therefore more efficient than when discharged from the entire surface of the discharge port Generation of water containing bubbles cannot be performed. Furthermore, at the high flow rate stage, the constricted flow of the discharged water and the increase in the flow velocity tend to occur. For this reason, problems such as water splashing and deterioration of appearance appear.

  In addition, as shown in FIG. 4B, if the water jetted from the plurality of holes 211 to the downstream bubble mixing part 300 is biased toward the outer diameter side of the internal flow path, the flow rate of the discharged water increases. It cannot be suppressed.

  FIG. 4B shows that the water jetted from the plurality of holes 211 to the downstream bubble mixing unit 300 collides with the upstream surface of the inclined unit 320 and is biased toward the outer diameter side of the internal flow path. Since it flows into 400, the gas-liquid interface is formed only on the outer diameter side on the upstream surface side of the rectifying unit 400.

  If the gas-liquid interface is formed only on the outer diameter side on the upstream surface side of the rectifying unit 400, the generated bubble-mixed water is not discharged from the entire surface of the discharge port 113. It is not possible to produce good water with bubbles. Furthermore, in the high flow rate stage, compared to the case where the discharge is made from the entire discharge port, the flow rate of the discharged water is likely to increase. For this reason, problems such as water splashing and deterioration of appearance appear.

  In the present embodiment, by providing the rib of the rectifying unit, a gas-liquid interface is easily formed on the entire upstream surface side of the rectifying unit 400, and more efficient air mixing as illustrated in FIG. 3 can be performed. It was made possible to suppress the occurrence of contraction of bubble-containing water and increase in flow velocity.

  FIG. 5 is a schematic cross-sectional view for explaining the state of water flow in the foam water spouting device of the present invention. FIG. 6 is a schematic cross-sectional view for explaining the flow of water in the comparative example. 7 and 8 are cross-sectional views of the rectifying unit of the foam water spouting device of the present invention.

  In the present embodiment, as illustrated in FIG. 5A, the annular rectifying rib 411 is disposed on the inner diameter side of the extended line of the inclined surface of the inclined portion 320 included in the bubble mixing portion 300. Thereby, the annular rectifying rib 411 becomes a resistance of the flow of water guided toward the center of the flow path by the inclined portion 320, and the flow of the bubble-containing water can be decelerated. Therefore, a gas-liquid interface is easily formed on the entire upstream surface side of the rectifying unit 400. Therefore, even at a high flow rate stage, it is possible to prevent contraction of the discharged bubble-containing water and to suppress an increase in flow velocity.

  In addition, by reducing the flow of water guided toward the center of the flow path, it is possible to easily form a gas-liquid interface on the entire upstream surface side of the rectifying unit 400, and thus more efficient air Mixing can be performed.

Further, the annular rectification rib 411 is not disposed on the outer diameter side of the extended line of the inclined surface of the inclined portion 320. Therefore, the annular rectifying rib 411 can direct the flow of water guided by the inclined portion 320 toward the center of the internal flow path toward the outer diameter side of the internal flow path. As a result, a gas-liquid interface is easily formed on the entire upstream surface side of the rectifying unit 400.
Accordingly, it is possible to prevent the bubble-mixed water that is discharged even in the high flow rate stage from contracting and to suppress an increase in the flow velocity.

  The annular rectifying ribs 411 may not be completely annular but may be arranged in pieces.

  FIG. 5B shows another example of the embodiment according to the present invention, which does not include the inclined portion 320 whose diameter increases toward the rectifying portion 400.

  On the other hand, as shown in FIGS. 6A and 6B, when the annular rectifying rib 411 is disposed on the outer diameter side of the extended line of the inclined surface of the inclined portion 320 included in the bubble mixing portion 300. The water flow guided toward the center of the flow path by the inclined portion 320 is discharged without being decelerated as it is because the annular flow regulating rib 411 does not serve as a flow resistance.

  Moreover, since it is not directed to the outer diameter side of the internal flow path, a gas-liquid interface is hardly formed on the entire upstream surface side of the rectifying unit 400. Therefore, it becomes easy to generate | occur | produce the contraction flow of the bubble mixed water discharged, and the increase in the flow velocity.

  In the present embodiment, radial rectifying ribs 413 are arranged in the rectifying unit 400 so that the opening 410 is flat in the radial direction. Thereby, the uniformization of the flow velocity distribution in the radial direction can be further promoted. Due to this action, the deviation of the amount of water at the discharge port 113 is suppressed, so that it is possible to prevent a phenomenon in which air bubbles mixed in are discharged toward the inner diameter side of the discharge port 113. Therefore, it is possible to prevent the bubbling water from contracting from the discharge port 113 even at a high flow rate stage and to suppress an increase in the flow velocity.

  Further, by further promoting the uniformity of the flow velocity distribution in the radial direction, a gas-liquid interface can be formed on the entire upstream surface side of the rectifying unit 400, so that more efficient air mixing can be performed. .

  Furthermore, since the radial flow straightening ribs 413 can further promote the uniform flow velocity distribution in the radial direction, it is possible to suppress the shaking of the water discharge.

  In the present embodiment, as shown in FIG. 7, in the rectifying unit 400, the opening 410 partitioned by the rectifying grid is the outermost rectifying rib of the annular rectifying ribs 411 of the rectifying unit 400. An annular straightening rib 411 and a radial straightening rib 413 are arranged so that the opening ratio in the radial direction is larger than the radial direction. As a result, the inflow of water that tends to concentrate on the inner diameter side of the rectifying unit 400 is suppressed and the inflow of water to the outer diameter side is promoted. Can be prevented.

  In addition, by suppressing the inflow of water that tends to concentrate to the inner diameter side of the rectifying unit 400 and promoting the inflow of water to the outer diameter side, a gas-liquid interface is formed on the entire upstream surface side of the rectifying unit 400. Therefore, more efficient aeration can be performed.

  Furthermore, since the inflow of water that tends to concentrate to the inner diameter side of the rectifying unit 400 is suppressed and the inflow of water to the outer diameter side is promoted, the flow velocity distribution in the radial direction can be made uniform. Can be suppressed.

  As shown in FIG. 8, a plurality of rectifying grids are provided so that the opening ratio in the radially inner direction of the rectifying rib on the outermost diameter side of the annular rectifying rib 411 is larger than the opening ratio in the radially outer direction. The annular rectifying rib 411 may be provided.

  The embodiments of the present invention have been described so far. The present invention is not limited to these embodiments, and those appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the features of the present invention. For example, each element included in each of the specific examples described above and their arrangement, material, condition, shape, size, and the like are not limited to those illustrated, and can be changed as appropriate. In addition, since the elements included in the above-described embodiments can be combined as much as technically possible, combinations of these elements are also included in the scope of the present invention as long as they include the features of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Foam spouting device 110 ... Main-body part 111 ... Inflow port 113 ... Ejection port 150 ... Upper diameter-reducing part 151 ... Annular convex part 153 ... Eaves part 155 ... Inflow hole 200 ... Orifice part 210 ... Pressure-reducing plate 211 ... Multiple holes 300 ... Bubble mixing part 310 ... Air introduction path 311 ... Air hole 320 ... Inclined part 400 ... Rectifying part 410 ... Opening part 411 ... Annular rectifying rib 413 ... Radial rectifying rib

Claims (3)

A foam water spouting device capable of discharging water flowing in from an inflow port as air bubble mixed water from a discharge port,
A main body portion in which an internal flow path from the inflow port to the discharge port is formed;
An orifice for injecting water flowing in from the inflow port toward the downstream side of the internal flow path at a higher flow velocity;
An air hole that introduces air into the internal flow path is formed, and a bubble mixing part that mixes the air introduced from the air hole into water jetted from the orifice part to form the bubble mixed water;
A rectifying unit that is disposed downstream of the bubble mixing unit and rectifies and discharges the bubble mixed water from the discharge port;
With
The orifice part is provided so as to block the internal flow path, and has a decompression plate formed with a plurality of holes,
The bubble mixing part has an inclined part whose diameter is reduced in a funnel shape toward the downstream side so that water sprayed from the plurality of holes is directed toward the center of the internal flow path.
The rectifying unit includes a rectifying grid for rectifying the bubble mixed water generated in the bubble mixing unit, and the rectifying grid includes an annular rectifying rib and a radial rectifying rib. The foam fountain apparatus according to claim 1, wherein an annular rectifying rib disposed on the outermost diameter side among the rectifying ribs is disposed on an inner diameter side with respect to an extended line of the inclined surface of the inclined portion.
The rectifying grid has a plurality of openings partitioned by the annular rectifying ribs and the radial rectifying ribs, and has a diameter outside the annular rectifying rib disposed on the outermost diameter side. The foam water spouting device according to claim 1, wherein the plurality of openings disposed in the direction are formed in a flat shape in the radial direction.
  The foam spouting device according to claim 1, wherein an opening ratio in the radially outward direction is larger than an opening ratio in the radially inward direction than the annular rectifying rib disposed on the outermost diameter side.

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