JP2002275969A - Foamed water discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foamed water discharging device capable of discharging a considerable quantity of water without reference to a water discharging angle. SOLUTION: In the foamed water discharging device, an end of a faucet is provided via a joint with a foamed water discharging port wherein an air mixing mechanism and a rectifying mechanism are provided in this order from an upstream side midway along a channel extending between a washing water inflow port and a bubble flow discharging port. The foamed water discharging device is characterized as follows: the air mixing mechanism has a pressure reducing plate, which is disposed in such a manner as to block the channel while having a plurality of small holes disposed on a circumference of a circle which is concentric with the bubble flow discharging port and larger in diameter than the bubble flow discharging port, and an air hole formed in a channel surrounding wall downstream from the pressure reducing plate, the rectifying mechanism has an inclined part of the channel, whose diameter is made smaller in a funneled manner downstream from a back flow preventing part, a rectifying part of the channel, which extends toward the bubble flow discharging port from a downstream end of the inclined part and is concentric with the bubble flow discharging port, an R part of the channel, which connects the inclined part with the rectifying part, and a turbulence-damping grid disposed in such a manner as to block the rectifying part of the channel; and upstream from the pressure reducing plate, there is provided a choke part having a cross section of a water passing channel, which is smaller in area than that of the channel of the joint.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam spouting apparatus which is attached to the tip of a faucet and has a foam spout for foaming water supply.

[0002]

2. Description of the Related Art A water faucet provided with a foam water outlet has been conventionally used in order to reduce a water supply noise and a falling sound to a sink or to eliminate water splashing. 5L
When the amount of water was reduced to about 2 L / min in order to save water, air was not mixed in, and there was no voluminous feeling or water force of spouting, and it was not possible to reduce water splashing. However, as shown in Japanese Patent Application No. 2000-076759, we have created a foam water spout that can mix a larger amount of air than before with a water flow rate of about 2 L / min. Moreover, I was able to control the splash of water.

[0003]

In the above invention,
It was also found that the unity of the water discharge was slightly reduced depending on the shape of the water passage of the faucet to which the foam water discharge port was attached and the water discharge angle at which the water was discharged. Therefore, an object of the present invention is to provide a foam water discharge device which can discharge water in a coherent manner regardless of a water discharge angle.

[0004]

Means for Solving the Problems and Action / Effect The invention according to claim 1 for solving the above problems is provided in the middle of the flow path extending between the washing water inlet and the bubble flow outlet. In a foam water spouting device provided with a foam water spout provided with an air mixing mechanism and a rectification mechanism in this order from the upstream side at the tip of a faucet via a joint, the air mixing mechanism has a circle concentric with the bubble flow discharge port. And a decompression plate disposed on the circumference of a circle having a larger diameter than the bubble flow discharge port and having a plurality of small holes and disposed so as to close the flow path, and a flow path surrounding wall downstream of the decompression plate. The air flow device has a formed air hole and a backflow prevention portion disposed downstream of the air hole, and the rectifying mechanism includes a slope portion of a flow path that reduces in diameter in a funnel shape downstream of the backflow prevention portion, and a downstream portion of the slope portion. Connecting the flow straightening portion, which is concentric with the bubble flow outlet extending from the end toward the bubble flow outlet, to the inclined portion and the flow straightening portion. An R portion of the flow path, a rectifying grid disposed to close the rectifying section of the flow path, and a rectifying path connected to the rectifying section downstream of the rectifying grid, and upstream of the pressure reducing plate, A throttle portion having a cross section of a water flow passage smaller than a cross sectional area of the passage is provided.

In the present invention, when the washing water passes through the small holes of the pressure reducing plate, the pressure energy is converted into kinetic energy, and the jet from the small holes increases the flow velocity, and this jet entrains the surrounding air due to viscosity. Furthermore, the high-speed flow containing air collides with the funnel-shaped inclined part, turbulently breaks the air, converts it into a foamy flow, converges along the inclined part, and is rectified by the rectifying grid,
They are collected and discharged in a rectification path.

Here, by providing the throttle portion upstream of the pressure reducing plate, the water flow to the small holes of the pressure reducing plate becomes uniform and the state including a lot of turbulence is generated, and the flow passes through the small holes of the pressure reducing plate. Since the jet created by this process is jetted as a turbulent flow, the contact area between the jet and the air increases, the amount of air mixed in increases, the volume of the water discharged rectified by the rectifying grid increases, and the unity of the water discharge increases. Get better. Further, since the water is uniformly dispersed in the small holes of the pressure reducing plate, the dispersion of each jet discharged from the small holes is eliminated, and the fluctuation of the water discharged from the bubble flow discharge port is suppressed.

The invention according to claim 2 is characterized in that the throttle section is a constant flow rate adjusting means for maintaining the instantaneous flow rate at a predetermined value.

[0008] In the present invention, the washing water after passing through the constant flow rate control means becomes a partial jet, so that the water is passed through the small holes of the pressure reducing plate uniformly and with a lot of turbulence, and passes through the small holes. The jet flow increases the contact area with the air and entrains a large amount of air, so that the volume of the water discharged by the flow straightening grid is increased, and the water discharge is improved. Moreover,
Since the instantaneous flow rate can be maintained at a predetermined value by the constant flow rate adjusting means, the sense of volume and water force of the water discharge is stabilized regardless of the water pressure condition and the installation condition, and the usability is improved without a change in the water discharge position.

The invention according to claim 3 is characterized in that the water flow passage of the throttle portion has a strainer for preventing foreign substances from entering the small holes of the pressure reducing plate.

In the present invention, by providing a strainer in the water flow passage of the throttle portion to prevent foreign matter from entering the small holes of the pressure reducing plate, the foreign matter can be mixed into the small holes of the pressure reducing plate and the small holes can be clogged. Can be prevented, and stable water discharge can be realized over a long period of time.

According to a fourth aspect of the present invention, the throttle portion is provided between the washing water inlet and the pressure reducing plate. In the present invention, by providing the throttle portion between the washing water inlet and the pressure reducing plate in the foam water discharge port, changing the foam water discharge port discharges the foam discharge water which is cohesive and contains a large amount of air. Therefore, stable water discharge can be realized only by replacing the foam water discharge port in the existing faucet regardless of the shape of the water passage.

According to a fifth aspect of the present invention, the throttle portion is integral with the pressure reducing plate.

In the present invention, the number of parts is reduced and the assemblability is improved because the throttle portion is integrated with the pressure reducing plate.

The invention according to claim 6 is characterized in that the throttle portion is provided in the water passage of the joint.

In the present invention, by providing the throttle in the water passage of the joint, the number of parts of the foam water discharge port can be reduced, so that the cost can be reduced, and the foam water discharge port can be made compact. There is less protrusion from the faucet body and the design is improved.

The invention according to claim 7 is characterized in that the throttle portion is provided within 20 mm from the pressure reducing plate.

In the present invention, since the throttle portion is provided near the pressure reducing plate, the flow accelerated in the throttle portion becomes a flow containing much turbulence before entering the small hole of the pressure reducing plate. Since the jet created by the flow passing through the small holes of the pressure reducing plate is jetted as a turbulent flow, the contact area between the jet and the air increases, and the amount of air entrapment increases. In addition, water can be uniformly passed through the small holes of the pressure reducing plate, so that the water discharge is stabilized.

The invention according to claim 8 is characterized in that the water passage in the throttle portion is a water passage inside the small hole of the pressure reducing plate and concentric with the small hole arrangement circle. In the present invention,
The throttle section is provided inside the small hole of the pressure reducing plate, so that the flow accelerated by the throttle section does not directly go to the small hole, and the water is evenly flowed through the small hole, causing the water to sway. Water can be suppressed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a foam spouting apparatus in which a foam spout according to a first embodiment of the present invention is installed at the tip of a faucet,
A throttle section is provided in the foam spout. In FIG. 1, a foam spout 2 is attached to a joint 1a at the tip of a faucet main body 1. FIG. 2 shows the details of the foam water discharge port 2. The foam water discharge port 2 includes a diaphragm plate 6 and a pressure reducing plate 3, which are arranged in order from the upstream side of the flow path to the downstream side, as a restrictor. And an outer cylinder 5 for accommodating the above members. The upstream end of the outer cylinder 5 forms a washing water inlet 7, and the downstream end of the inner cylinder 3 forms a bubble flow outlet 8. Decompression plate 3 of outer cylinder 5
A cleaning water flow path 9a is formed by an internal space of a portion upstream of the cleaning water flow path, and a cleaning water flow path 9b is formed by an internal space of the inner cylinder 3.

The throttle plate 6 has a central hole 6a concentric with the bubble flow outlet 8, and is disposed so as to close the downstream end of the washing water flow path. The pressure reducing plate 3 is a circle concentric with the bubble flow outlet 8 and has a plurality of small holes 3a arranged at equal intervals on a circumference of a circle having a larger diameter than the bubble flow outlet 8, and an air hole. 3b and a backflow prevention portion 3c, and are disposed so as to close the upstream end of the washing water flow path formed by the inner cylinder 4.

An air hole 4a is formed in the side wall of the inner cylinder 4 forming the washing water flow path immediately downstream of the pressure reducing plate 3. The air hole 4a is provided in the air passage 1 formed between the inner cylinder 4 and the outer cylinder 5.
0, it communicates with the external space of the outer cylinder 5.

The pressure reducing plate 3 in which the small holes 3a, the air holes 3b, and the backflow preventing portions 3c are formed, the air holes 4a formed in the inner cylinder 4, the air passages 10, and the inclined portion 4b of the washing water flow passage described later. An air mixing mechanism is configured.

The inner cylinder 4 is reduced in diameter in a funnel shape downstream of the air hole 4a to have the same diameter as the downstream end forming the bubble flow discharge port 8, and then extends vertically toward the downstream end. I have. Therefore,
The washing water flow path 9b formed by the inner cylinder 4 has a slope 4b having a diameter reduced in a funnel shape downstream of the air hole 4a, and a rectifying section 4c having the same diameter as the bubble flow discharge port 8 from the downstream end of the slope 4b. A rectifying grid 4d disposed so as to close the downstream end of the rectifying section 4c of the washing water flow path 9b, and a rectifying path 4e concentric with the bubble flow discharge port 8 and having the same diameter downstream of the rectifying grid 4d. The downstream end of the rectification path 4e forms a bubble flow discharge port 8.

The inclined section 4b and the rectifying section 4c are connected to the inclined section 4b.
And a rectifying section 4c, and are smoothly connected by an R section 4f formed of an arc in contact with the rectifying section 4c. A rectifying mechanism is constituted by the inclined portion 4b, the R portion 4f, the rectifying portion 4c, the rectifying grid 4d, and the rectifying path 4e.

In the above configuration, the water passage 1b of the joint 1a fixed to the faucet main body 1 is eccentric with respect to the bubble flow discharge port 8 of the foam water discharge port 2, and passes through the water passage 1b to wash water inlet 7 The washing water flowing into the washing water flow passage 9a is collected at the center by the center hole 6a of the diameter reducing plate 6, and collides with the pressure reducing plate 3 in a speed-up state, so that the cleaning water is formed by the pressure reducing plate 3 and the diameter reducing plate 6. The inner space contains a lot of turbulence and spreads uniformly on the pressure reducing plate 3, and is discharged as a high-speed linear flow from the plurality of small holes 3 a of the pressure reducing plate 3.

A plurality of high-speed linear flows ejected from the small holes 3a entrain outside air through the air holes 3b and 4a and the air passage 10. Since the linear flow is in a turbulent state, the contact area between the jet and the air is increased as compared with the rectified state, so that a large amount of air can be entrained.

When the cylindrical linear flow collides with the inclined portion 4b of the washing water flow path 9b, the air entrained in the washing water becomes a large number of fine bubbles and is dispersed and mixed in the washing water. The cylindrical bubble flow in which a large number of fine bubbles are mixed in the washing water flows along the inclined portion 4b of the washing water flow passage 9b, and has a reduced diameter, and flows into the rectifying portion 4c of the washing water passage 9b. At this time, since the washing water spread uniformly on the pressure reducing plate 3 and the flow velocity of the linear flow ejected from the small holes 3a of the pressure reducing plate 3 is the same, the linear flow is formed by colliding with the inclined portion 4b. The fluctuation of the generated bubble flow in the process of flowing along the inclined portion 4b of the washing water flow path 9b and reducing the diameter is suppressed.

The bubble flow flowing through the rectifying section 4c is
After being rectified through d, the rectification is performed by the rectification path 4e and discharged from the bubble flow discharge port 8.

Since the bubble flow discharged from the bubble flow discharge port contains an extremely large number of bubbles as compared with the case where the throttle plate 6 is not used, the volume of the bubble flow is increased and the unity is improved. Further, since the fluctuation of the bubble flow is suppressed, it is possible to improve the user's visual sensation and hand-washing sensation, and to save water.

As in the present embodiment, the diaphragm plate 6 is
Is provided, it is possible to realize stable foam discharge regardless of the shape of the existing joint. In addition, the center hole 6
By using a as a strainer, dust can be prevented from clogging the small holes 3a of the pressure reducing plate even when the existing faucet main body does not have a strainer, so that long-term stable water discharge can be realized.

FIG. 3 shows the relationship between the flow rate and the air mixing ratio depending on the presence or absence of the diameter reducing plate 6 in this embodiment. In addition, the flow rate is 2 L / min to 3 L / min in consideration of water saving, the diameter of the bubble flow discharge port 8 is Φ12, the arrangement diameter of the small hole 3a of the pressure reducing plate 3 is Φ15,
The diameter of the center hole 6a of the diameter reducing plate 6 is Φ8. However, the same effect can be obtained when the diameter of the center hole 6a is in the range of Φ8 to Φ13.

FIG. 4 shows a foam spouting apparatus according to a second embodiment, in which a constant flow valve 11 as a throttle is provided at the foam spout 2. The foam water discharge port 2 includes a constant flow valve 11, a constant flow valve guide 12, and a constant flow valve 11, which are sequentially arranged from the upstream side to the downstream side of the flow path.
The apparatus includes a pressure reducing plate 3 and an inner cylinder 4, and further includes an outer cylinder 5 for accommodating the above members. The upstream side of the outer cylinder 5 is the washing water inlet 7
And the downstream end of the inner cylinder 4 forms a bubble flow discharge port 8. A cleaning water flow path 9a is formed by the internal space of the outer cylinder 5 at a position upstream of the pressure reducing plate 3, and a cleaning water flow path 9b is formed by the internal space of the inner cylinder 3. Constant flow valve 11 is a cover 1 with 11a ₁ the bubble flow discharge port 8 concentric with the center hole
1a, a core 11b having a groove 11b ₁ and an O-ring 11c
The washing water flow path is disposed so as to close the downstream end thereof.

In the above construction, the washing water flowing into the washing water flow passage 9a from the washing water inflow port 7 through the water passage 1b of the joint 1a fixed to the faucet body 1 is supplied to the groove 11b of the core 11b of the constant flow valve 11. ₁ makes several partial jets, collides with the pressure reducing plate 3 through the center hole 11a ₁ of the cover 11a,
The internal space formed by the pressure reducing plate 3 and the constant flow valve 11 contains a lot of turbulence, spreads uniformly to the pressure reducing plate 3, and forms a high-speed linear flow from the plurality of small holes 3a of the pressure reducing plate 3. Because of the discharge, the bubble flow discharged from the bubble flow discharge port 8 becomes a large volume containing a large amount of air, similarly to the above embodiment.

In this embodiment, since the amount of water is kept constant by the constant flow valve 11, stable water discharge can be realized without being affected by external factors such as pressure fluctuations.

FIG. 5 shows a third embodiment of the present invention in which
a. Further, the throttle may be a constant flow valve. The water passage 1b of the joint 1a is a small hole 3a of the pressure reducing plate 3.
This is a constricted circular water passage formed concentrically with the inside of the small hole 3a. Also in this embodiment, the bubble flow discharged from the bubble flow discharge port 8 by the same operation as the first embodiment becomes a large volume containing a large amount of air.

In this embodiment, the same effect as in the above embodiment can be obtained by devising the shape of the joint 1a without increasing the number of components forming the foam water discharge port 2.

[Brief description of the drawings]

FIG. 1 is a schematic view of a foam water discharging apparatus according to a first embodiment of the present invention.

FIG. 2 is a detailed view of a foam spout.

FIG. 3 is a graph showing a relationship between a flow rate and an air mixing ratio depending on the presence or absence of a diameter reducing plate according to the present embodiment.

FIG. 4 is a schematic view of a foam spouting apparatus according to a second embodiment of the present invention.

FIG. 5 is a schematic view of a foam spouting apparatus according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Water faucet main body, 1a ... Joint, 1b ... Water passage, 2 ... Foam spout, 3 ... Pressure reducing plate, 3a ... Small hole, 3b ... Air hole, 3c ...
Backflow prevention part, 4 ... inner cylinder, 4a ... air hole, 4b ... inclined part,
4c: rectifying section, 4d: rectifying grid, 4e: rectifying path, 4f:
R part, 5 ... outer cylinder, 6 ... throttle plate, 6a ... center hole, 7 ... washing water inflow port, 8 ... bubble flow discharge port, 9a ... washing water flow path, 9b
... Washing water passage, 10 ... Air passage, 11 ... Constant flow valve, 11
a ... cover, 11b ... core, 11c ... O-ring

Continued on the front page F term (reference) 2D038 CA02 ZA01 ZA02 2D039 CD01 DB05 DB06 2D060 CB01 CC01 CC12 CC17

Claims (8)

[Claims] 1. A foam discharge port provided with an air mixing mechanism and a rectification mechanism in this order from the upstream side in a flow path extending between a washing water inlet and a bubble flow discharge port, and a water outlet through a joint. In the foam water spouting device provided at the tip of the stopper, the air mixing mechanism is a circle concentric with the bubble flow discharge port and a plurality of small holes arranged on the circumference of a circle having a larger diameter than the bubble flow discharge port. A pressure reducing plate disposed so as to close the flow path, an air hole formed in a flow path surrounding wall downstream of the pressure reducing plate, and a backflow prevention portion disposed downstream of the air hole, a rectifying mechanism Is a slope of a flow path that reduces the diameter of the funnel downstream of the backflow prevention section, and a rectifying section of a flow path that is concentric with the bubble flow outlet that extends from the downstream end of the slope toward the bubble flow outlet. An R portion of the flow path connecting the inclined portion and the rectification portion, a rectification grid disposed to close the rectification portion of the flow channel, and a rectification portion downstream of the rectification grid. And a rectifier circuit that, upstream from the vacuum plate, foam water discharge device, characterized in that a throttle portion having a small through flow passage cross section than the flow path cross-sectional area of the joint. 2. A foam spouting device according to claim 1, wherein said throttle section is a constant flow rate adjusting means for maintaining an instantaneous flow rate at a predetermined value. 3. The foam spouting device according to claim 1, wherein a strainer for preventing foreign substances from being mixed into small holes of the pressure reducing plate is provided in the water flow passage of the throttle unit. 4. The foam spouting device according to claim 1, wherein the throttle portion is provided between the washing water inlet and the pressure reducing plate. 5. The foam spouting device according to claim 4, wherein said throttle portion is integral with a pressure reducing plate. 6. The foam spouting device according to claim 1, wherein the throttle portion is provided in a water passage of a joint. 7. The apparatus according to claim 4, wherein the throttle portion is provided within 20 mm from the pressure reducing plate. 8. The foam discharge according to claim 4, wherein the water flow path of the throttle portion is a water flow hole inside the small hole of the pressure reducing plate and concentric with the small hole arrangement circle. apparatus.