JP2001279787A - Flush toilet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet effectively make use of a bubbling stream to clean the upper inside face than the stationary water level face of the accumulated water in a bowl. SOLUTION: The flush toilet is provided with a toilet stool body having a bowl in which washing water is held as accumulated water, a washing water feeding means supplying the washing water to the stool body, an air mixing means sucking air to mix with the washing water, and a first washing water discharge means discharging the washing water mixed with air in the substantially horizontal direction along the upper inside wall face of the bowl than the stationary water level face of the accumulated water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet having a toilet body having a bowl for storing flush water as stored water, and flush water supply means for supplying flush water to the toilet body.

[0002]

2. Description of the Related Art A flush toilet having a toilet body having a bowl portion for storing flush water as stored water and a flush water supply means for supplying flush water to the flush body, which is designed to promote the occurrence of a siphon phenomenon. Japanese Patent Application Laid-Open No. 6-299585 discloses a flush toilet in which air is sucked and mixed into jet water discharged from a bottom of a bowl toward a drain trap to suck water.

[0003]

The bubble flow of the washing water in which a large number of bubbles are dispersed and mixed in the washing water has little water splash and noise when colliding with the solid surface, and is generated when colliding with the solid surface. High cleaning power due to high frequency vibration. Therefore, the bubble flow of the cleaning water is effective not only for saving the jet water but also for cleaning the inner wall surface of the bowl portion above the stationary interface of the stored water. SUMMARY OF THE INVENTION It is an object of the present invention to provide a flush toilet that effectively utilizes a bubble flow for cleaning an inner wall surface of a bowl portion above a stationary interface of stored water.

[0004]

According to the present invention, in order to solve the above-mentioned problems, a toilet body having a bowl portion for storing washing water as stored water, and a washing water supply means for supplying the washing water to the toilet body. Air mixing means for suctioning and mixing air into the cleaning water, and first cleaning water discharging means for discharging the cleaning water containing air bubbles substantially horizontally along the inner wall surface of the bowl portion above the stationary interface of the stored water. A flush toilet characterized by comprising: In the flush toilet according to the present invention, air is suctioned and mixed into the washing water by the air mixing means. By controlling the air mixing ratio to an appropriate value, a large number of bubbles can be dispersed and mixed in the cleaning water to generate a bubble flow of the cleaning water. By the first washing water discharge means, the bubble flow of the washing water is discharged substantially horizontally along the inner wall surface of the bowl portion above the stationary interface of the stored water. Since the bubble flow of the washing water has less water splashing and noise when colliding with the inner wall surface of the bowl portion, the washing of the inner wall surface of the bowl portion is sanitized and noise is reduced. The bubble flow of the washing water cleans the inner wall surface of the bowl portion while circling on the inner wall surface of the bowl portion above the stationary interface of the stored water. The cleaning water bubble circulating on the inner wall of the bowl stays on the inner wall of the bowl for a long time. Wash. By dispersing and mixing a large number of bubbles in the washing water, the washing water required for washing the inner wall surface of the bowl portion is saved. As can be seen from the above description, in the flush toilet according to the present invention, by effectively utilizing the bubble flow, water saving of washing water required for washing the inner wall surface of the bowl portion, sanitization and quietness of washing of the inner wall surface of the bowl portion, The cleaning power of the inner wall surface of the bowl has been enhanced.

[0005] In a preferred aspect of the present invention, the flush toilet is provided with flush water flow control means for controlling the flush water flow rate. By controlling the flow rate of the cleaning water to control the flow rate of the cleaning water, the air mixing rate can be controlled, and thus the air mixing rate can be controlled to an appropriate value to generate a bubble flow of the cleaning water. .

In a preferred embodiment of the present invention, the flush water supply means is a means for supplying flush water directly to the toilet body from a water pipe. The water pressure in the water supply pipe is higher than the water head difference when the flush water is supplied from the flush water storage tank disposed near the toilet body to the toilet body using the head difference.
By supplying flush water directly from the water pipe to the toilet body, it is possible to obtain flush water with a sufficient flow rate using the water pressure in the water pipe, and a sufficient amount of air can be sucked into the flush water. it can.

In a preferred embodiment of the present invention, an overhang is formed at the upper end of the inner wall surface of the bowl portion. Due to the overhang, it is possible to prevent a situation in which the bubble flow of the cleaning water discharged substantially horizontally flows out of the bowl portion beyond the upper end thereof.

[0008] In a preferred aspect of the present invention, the first washing water discharging means is disposed immediately below the overhang. By disposing the first washing water discharge means directly below the overhang, it is possible to wash substantially the entire inner wall surface of the bowl portion above the stationary interface of the stored water.

In a preferred aspect of the present invention, the flush toilet has a flush water pipe having one end communicating with the aeration means and the other end communicating with the flush water discharging means. By disposing the washing water pipe, it is possible to dispose the air mixing means at a predetermined distance from the washing water discharging means, and it is easy to dispose the sealing member for sealing the washing water discharging means penetrating portion on the side wall of the bowl portion. Become.

[0010] In a preferred aspect of the present invention, the flush toilet has an air introduction pipe having one end connected to the air mixing means and the other end opened. By arranging the air introduction pipe, the degree of freedom in arranging the air suction position is increased, and it is possible to arrange the air suction position in a place where the toilet user does not see it and is not exposed to water. By disposing the air introduction pipe, noise generated by the air mixing means can be kept away from the user, and the quietness of the flush toilet is improved.

In a preferred aspect of the present invention, the flush toilet has a flush water pipe having one end communicating with the air mixing means and the other end communicating with the flush water discharging means, and one end communicating with the air mixing means and the other end being open. The cleaning water pipe and the air introduction pipe extend substantially in parallel. By extending the washing water pipe and the air introduction pipe substantially in parallel, the device including the air mixing means, the air introduction pipe, the washing water pipe, and the first washing water discharge means can be downsized.

In a preferred embodiment of the present invention, the air introduction pipe has a bulging portion. The bulging portion functions as a muffler, and the noise generated by the air mixing means can be reduced.

In a preferred aspect of the present invention, the air introduction pipe has a washing water discharging means for discharging the washing water flowing backward from the air mixing means. By discharging the washing water flowing backward from the air mixing means from the air introduction pipe, stable air mixing can be achieved. By preventing contact between the air flowing at high speed through the air introduction pipe and water, generation of noise due to the contact can be prevented.

[0014] In a preferred aspect of the present invention, the washing water discharging means is an inclined air introducing pipe descending toward the other open end. If the air introduction pipe is inclined downward toward the open other end, the washing water flowing backward from the air mixing means flows toward the open end by its own weight and is discharged from the open end.

In a preferred embodiment of the present invention, the open other end of the air introduction pipe is opened on the inner wall surface of the bowl portion of the toilet body. If the open end of the air introduction pipe is opened on the inner wall surface of the bowl portion, the washing water flowing backward from the air mixing means can be discharged to the bowl portion. Further, when the first washing water discharge means is closed, the washing water can be discharged to the bowl portion.

In a preferred embodiment of the present invention, the air mixing means is disposed immediately adjacent to the washing water discharging means. By reducing the distance between the aeration means and the wash water discharge means, the flow velocity of the discharge bubble flow due to the pressure loss caused by the wash water pipe between the aeration means and the wash water discharge means is suppressed, It is possible to suppress a decrease in the cleaning power of the discharge bubble flow.

In a preferred embodiment of the present invention, the air mixing means and the washing water discharging means are directly connected. By directly connecting the air mixing means and the cleaning water discharge means, the pressure loss caused by the cleaning water pipe between the air mixing means and the cleaning water discharge means becomes zero.

In a preferred embodiment of the present invention, the washing water pipe has a bulging portion. By temporarily retaining the washing water in which bubbles are mixed in the bulging portion, crushing of large-diameter bubbles is promoted, dispersion of bubbles is promoted, and generation of bubble flow is promoted.

In a preferred embodiment of the present invention, the cleaning water pipe upstream of the bulging portion and the cleaning water pipe downstream of the bulging portion are eccentric to each other. By decentering the washing water pipe on the upstream side of the bulging portion and the washing water pipe on the downstream side of the bulging portion, temporary stagnation of cleaning water mixed with bubbles in the bulging portion is promoted. In addition, the crushing of large diameter bubbles is promoted, the dispersion of bubbles is promoted, and the generation of bubble flow is promoted.

In a preferred embodiment of the present invention, the flush toilet is provided with an air mixing amount adjusting means. By adjusting the air mixing amount according to the flow rate of the washing water, a bubble flow can be generated stably.

In a preferred aspect of the present invention, the flush toilet is provided with second flush water discharging means for discharging flush water for driving the stored water in the bowl portion. By discharging the wash water from the second wash water discharge means to drive the pool water in the bowl portion, the sewage discharge function of the flush toilet is enhanced.

In a preferred aspect of the present invention, the flush toilet is provided with a discharge switching means for switching between flush water discharge from the first flush water discharge means and flush water discharge from the second flush water discharge means. By switching between the discharge of the wash water from the first wash water discharge means and the discharge of the wash water from the second wash water discharge means, the function of driving the stored water discharged from the second wash water discharge means is enhanced. Can be.

In a preferred aspect of the present invention, only the cleaning water is discharged from the second cleaning water discharging means. Since air is not mixed into the cleaning water discharged from the second cleaning water discharging means, there is no decrease in the flow velocity of the cleaning water due to air mixing, and high-speed cleaning water can be discharged from the second cleaning water discharging means.
As a result, the function of driving the stored water to be discharged from the second cleaning water discharging means is enhanced.

In a preferred aspect of the present invention, the air introduction pipe has a backflow preventing means for preventing backflow of the washing water from the air mixing means. With the arrangement of the backflow prevention means, it is possible to prevent the leakage of the washing water from the air introduction pipe.

In a preferred aspect of the present invention, the backflow prevention means has a movable valve body and a valve seat with which the valve body can abut, and the valve body is opened by the flush water flowing back from the air mixing means. It is pressed to the seat. The valve body pressed against the valve seat by the washing water flowing backward from the aeration means can easily constitute the backflow preventing means.

In a preferred embodiment of the present invention, the density of the valve body is smaller than the density of the washing water. If the density of the valve element is smaller than the density of the washing water, the valve element is reliably pressed against the valve seat by the backwashing water, even if the backflow speed of the washing water is low, and water leakage is reliably prevented.

In a preferred embodiment of the present invention, the valve body is separated from the valve seat when the flush toilet is not flushed. If the valve body is separated from the valve seat when the flush toilet is not flushed, the flush water in the flush water flow path connecting the flush water supply means and the first flush water discharge means can be replaced with air during the flush. Can,
It is hygienic.

In a preferred aspect of the present invention, the washing water supply means has a supply control means for controlling the start and stop of the supply of the washing water to the first washing water discharge means, and the air mixing means comprises a supply control means. It is located downstream of the means. If the air mixing means is disposed downstream in the vicinity of the supply control means, it is possible to suppress the occurrence of a water hammer when the supply of the washing water is stopped.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described. FIG.
As shown in FIG. 1, a siphon-type toilet body 1 has a bowl portion 2 for storing stored water, a reverse type S trap 3 having one end communicating with a bottom portion of the bowl portion 2, and a peripheral portion at an upper edge of the bowl portion 2. Bowl part 2 overhang 4 on inner wall
And a device storage section 5 disposed behind the bowl portion 2. The other end of the S trap 3 is connected to an external discharge pipe (not shown).

A valve unit 6 is stored in the equipment storage section 5. As shown in FIG. 2, the valve unit 6 includes a water stop valve 7, a flow path switching valve 9 connected to the water stop valve 7 via a wash water flow path 8, and a flow path switch via a wash water flow path 10a. A constant flow valve 11a for large flow connected to the valve 9, a constant flow valve 11b for small flow connected to the flow path switching valve 9 via a cleaning water flow path 10b, and a cleaning extending from the constant flow valve 11a for large flow. It has a water flow path 12a, a cleaning water flow path 12b extending from the small flow rate constant flow valve 11b, and a cleaning water flow path 13 connecting an end of the cleaning water flow path 12a and an end of the cleaning water flow path 12b. The water stop valve 7 and the flow path switching valve 9 are driven by an electromagnetic solenoid (not shown) via a control device (not shown). An operating device (not shown) for instructing a toilet flush operation is provided.

A washing water pipe 16 connected to a water supply pipe 15 via a water stop valve 14 is connected to the water stop valve 7 of the valve unit 6. The washing water flow path 13 of the valve unit 6 is connected to a washing water pipe 17. As shown in FIG. 1, the cleaning water pipe 17 is connected to an aeration device 18. The aeration device 18 is connected to a washing water discharge nozzle 20 via a washing water pipe 19. The washing water discharge nozzle 20 is disposed above the stationary interface of the stored water in the bowl portion 2 and directly below the overhang 4. Cleaning water discharge nozzle 2
Numeral 0 penetrates the side wall of the bowl portion 2 and opens to the inner wall surface of the bowl portion 2. The discharge port of the cleaning water discharge nozzle 20 is directed substantially horizontally along the inner wall surface of the bowl portion 2.
An air introduction pipe 21 extending from the aeration device 18 extends in parallel with the washing water pipe 19. The air introduction pipe 21 penetrates the side wall of the bowl portion 2 above the washing water discharge nozzle 20 and opens to the inner wall surface of the bowl portion 2.

As shown in FIG. 3, the aeration device 18
It has a washing water pipe member 18a and an air pipe member 18b orthogonal to the washing water pipe member 18a. One end of the washing water pipe member 18 a is connected to the washing water pipe 17, and the other end is connected to the washing water pipe 19. The air pipe member 18b is connected to the air introduction pipe 21.

The operation of the flush toilet according to this embodiment will be described. When a toilet user operates a not-shown operating device to instruct toilet flushing, the water stop valve 7 of the valve unit 6 opens, and the flow path switching valve 9 causes the flush water flow path 8 to move through the flush water flow path 1.
0a. Constant flow valve 11a for large flow rate through water stop valve 7, wash water flow path 8, flow path switching valve 9, and wash water flow path 10a
Wash water flows into the area. The cleaning water whose flow rate has been adjusted to a predetermined large flow rate by the large flow rate constant flow valve 11a is a cleaning water flow path 12a,
13. The water flows into the aeration device 18 via the cleaning water pipe 17. The air in the bowl portion 2 is sucked into the air introduction pipe 21 by the ejector action of the washing water flowing through the washing water pipe member 18 a of the aeration device 18. The air sucked into the air introduction pipe 21 is sucked into the washing water flowing through the washing water pipe member 18a via the air pipe member 18b. The flow rate of the washing water flowing through the washing water pipe member 18a is:
The flow rate of the washing water flowing through the washing water pipe member 18a is adjusted to an appropriate value by adjusting the flow rate of the washing water flowing through the washing water pipe member 18a to an appropriate value by the constant flow valve 11a for large flow rate. It is suppressed to less than. As a result, the cleaning water mixed with air does not become a spray flow in which the air layer and the cleaning water layer are separated and the mist of the cleaning water is dispersed in the air layer, and many bubbles are dispersed and mixed in the cleaning water. It becomes a bubble flow.

The bubble flow of the cleaning water passes through the cleaning water pipe 19 and is discharged from the cleaning water discharge nozzle 20 into the bowl portion 2. The bubble flow of the washing water is discharged substantially horizontally along the inner wall surface of the bowl portion 2 above the stationary interface of the stored water. Since the bubble flow of the washing water has less water splash and noise when colliding with the inner wall surface of the bowl portion 2, washing of the inner wall surface of the bowl portion 2 is sanitized and noise is reduced. The bubble flow of the cleaning water cleans the inner wall surface of the bowl portion while circling on the inner wall surface of the bowl portion 2 above the stationary interface of the stored water. Since the bubble flow of the cleaning water circulating on the inner wall surface of the bowl portion 2 stays on the inner wall surface of the bowl portion 2 for a long time, it is combined with the high detergency of the bubble flow itself due to the generation of high-frequency vibration, and the stationary interface The upper inner wall surface of the bowl portion 2 is strongly washed. By dispersing and mixing a large number of bubbles into the washing water, the washing water required for washing the inner wall surface of the bowl portion 2 is saved.

As can be seen from the above description, in the flush toilet according to the present embodiment, the bubble flow is effectively used to save the washing water required for cleaning the inner wall surface of the bowl portion 2 and the bowl portion 2.
This achieves sanitary and silent cleaning of the inner wall surface, and enhances the cleaning power of the inner wall surface of the bowl portion 2.

When a large amount of flush water is discharged from the flush water discharge nozzle 20 into the bowl portion 2 for a predetermined time, the S trap 3 is filled with sewage and a siphon phenomenon occurs. Due to the siphon phenomenon, the wastewater in the bowl portion 2 is discharged to the external discharge pipe via the S trap 3 at a stretch. S trap 3
Then, the siphon phenomenon is terminated by the air suction, and the drainage of the sewage in the bowl portion 2 is terminated.

When the discharge of the wastewater from the bowl portion 2 is completed, the flow path switching valve 9 of the valve unit 6 switches the connection destination of the flow path 8 from the flow path 10a to the flow path 10b. Wash water flows into the small flow rate constant flow valve 11b via the water stop valve 7, the wash water flow path 8, the flow path switching valve 9, and the wash water flow path 10b. Wash water whose flow rate has been adjusted to a predetermined small flow rate by the large flow rate constant flow valve 1ba flows into the aeration device 18 via the wash water flow paths 12a and 13 and the wash water pipe 17. Aeration device 1
Since the flow rate of the washing water flowing through the washing water pipe member 18a of No. 8 is small, the ejector action is suppressed, and the entry of air into the washing water is suppressed. As a result, the cleaning water having a small bubble content is supplied to the bowl portion 2 through the cleaning water discharge nozzle 20. The stored water is formed in the bowl portion 2 by the washing water supplied to the bowl portion 2. Since the discharge flow rate is small, water splashing and noise when washing water collides with the inner wall surface of the bowl portion 2 are small.

When the discharge of the cleaning water at a small flow rate from the cleaning water discharge nozzle 20 into the bowl portion 2 continues for a predetermined time, the water stop valve 7
Is closed, the discharge of the wash water from the wash water discharge nozzle 20 ends, and the toilet flushing ends.

In the flush toilet according to the present embodiment, flush water is supplied directly from the water supply pipe 15 to the toilet body 1.
The water pressure in the water supply pipe 15 is higher than the water pressure difference when the flush water is supplied from the flush water storage tank disposed near the toilet body to the toilet body using the water head difference. Water pipe 1
By supplying the flush water directly from 5 to the toilet body 1,
The flow rate of the washing water flowing through the washing water pipe member 18a of the aeration device 18 is sufficiently increased by utilizing the water pressure in the water supply pipe 15, and a sufficient amount of air is sucked and mixed into the washing water to form bubbles of the washing water. A stream can be generated.

In the flush toilet according to the present embodiment, since the overhang 4 is formed at the upper end of the inner wall surface of the bowl portion 2, the bubble flow of the washing water discharged substantially horizontally is generated.
The occurrence of a situation in which the liquid flows out beyond the upper end of the frame is prevented.

In the flush toilet according to the present embodiment, the flush water discharge nozzle 20 is disposed immediately below the overhang 4, so that substantially the entire inner wall surface of the bowl portion 2 above the stationary interface of the stored water. It is possible to wash.

In the flush toilet according to the present embodiment, an aeration device 18 is connected to a flush water discharge nozzle 20 via a flush water pipe 19. As a result, it becomes possible to dispose the aeration device 18 at a predetermined distance from the cleaning water discharge nozzle 20, and the cleaning water discharge nozzle 20 on the side wall of the bowl portion 2.
The arrangement of the seal member for sealing the penetrating portion is facilitated.

In the flush toilet according to the present embodiment, an air introduction pipe 21 extends from the aeration device 18. By arranging the air introduction pipe 21, the degree of freedom in arranging the air suction position is increased, and it is possible to arrange the air suction position in a place where the toilet user does not see it and when it is not exposed to water. By arranging the air introduction pipe 21, the aeration device 1
8 can be kept away from the user, and the quietness of the flush toilet is improved.

In the flush toilet according to the present embodiment, the open end of the air introduction pipe 21 is open to the inner wall surface of the bowl portion 2. As a result, when the washing water discharge nozzle 20 is closed, the washing water can be discharged to the bowl portion 2.

In the flush toilet according to the present embodiment, the flush water pipe 19 and the air introduction pipe 21 extend substantially in parallel. By extending them substantially in parallel, the size of the device constituted by the aeration device 18, the washing water pipe 19, the washing water discharge nozzle 20, and the air introduction pipe 21 is reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. As shown in FIG. 3, a bulging portion 21 a may be formed on the way of the air introduction pipe 21.
The bulging portion 21a functions as a silencer, and the aeration device 18
Can reduce the noise generated. As shown in FIG. 3, a cleaning water discharge pipe 22 branched from the air introduction pipe 21 and extending downward may be provided. By discharging the cleaning water flowing backward from the aeration device 18 from the air introduction pipe 21 through the cleaning water discharge pipe 22, stable air mixing into the cleaning water becomes possible. By preventing contact between the air flowing at high speed through the air introduction pipe 21 and water, generation of noise due to the contact can be prevented. As shown by a two-dot chain line in FIG. 3, the air introduction pipe 21 may be inclined downward toward the open end. If the air introduction pipe 21 is inclined downward toward the open end, the washing water flowing backward from the aeration device 18 flows toward the open end by its own weight and is discharged from the open end to the bowl portion 2. . The air introduction pipe 21 may be removed.

The washing water pipe 19 is shortened, and the
8 may be arranged immediately near the washing water discharge nozzle 20. By shortening the distance between the aeration device 18 and the cleaning water discharge nozzle 20, the flow velocity of the discharge bubble flow due to the pressure loss caused by the pipe 19 between the aeration device 18 and the cleaning water discharge nozzle 20 can be reduced. It is possible to suppress a decrease in the cleaning power of the discharge bubble flow. As shown in FIG. 4, an air mixing device 18 'having an air hole 18b' formed in a side wall of a washing water pipe member 18a 'is directly connected to a washing water discharge nozzle 20' without passing through a washing water pipe. Is also good. Aeration device 1
By directly connecting the cleaning water discharge nozzle 20 'with the cleaning water discharge nozzle 20', the cleaning water pipe 19 becomes unnecessary, and the pressure loss due to the pipe becomes zero.

As shown in FIG. 5, a bulging portion 19a may be formed in the washing water pipe 19. By temporarily retaining the washing water in which bubbles are mixed in the bulging portion 19a, the crushing of large-diameter bubbles is promoted, the dispersion of bubbles is promoted, and the generation of a bubble flow is promoted. As shown in FIG.
9, a portion upstream of the bulging portion 19a, and the bulging portion 19a.
A portion downstream from the center may be eccentric to each other. By decentering a portion of the cleaning water pipe 19 upstream of the bulging portion 19a and a portion of the cleaning water pipe 19 downstream of the bulging portion 19a, the cleaning water mixed with air bubbles in the bulging portion 19a. Is temporarily promoted, the crushing of large-diameter bubbles is promoted, the dispersion of bubbles is promoted, and the generation of a bubble flow is promoted.

As shown in FIG. 1, a flow regulating valve 23 may be provided on the way of the air introducing pipe 21. Constant flow valve 11a
Even if the flow rate of the washing water flowing through the washing water pipe member 18a of the aeration device 18 fluctuates due to an operation failure of the air mixing device 18, etc., the air bubble amount can be stably adjusted by adjusting the aeration amount according to the fluctuation of the washing water flow rate. Can be generated.

The flow switching valve 9 and the constant flow valves 11a and 11b may be removed, and the cleaning water flow path 8 may be connected to the cleaning water flow path 13 via a flow control valve. By adjusting the flow rate of the washing water flowing through the washing water pipe member 18a of the aeration device 18 by the flow rate adjusting valve and adjusting the air mixing rate to an appropriate value, a bubble flow of the washing water can be generated. In addition, a large flow rate at the time of flushing the toilet and a small flow rate at the time of supplying the pool water can be obtained by the flow control valve.

A flash valve may be provided instead of the valve unit 6. By using a flush valve having an appropriate flow rate characteristic, it is possible to realize flushing of a toilet bowl that discharges a bubble flow, and generation of stored water using flush water with a low air bubble mixing ratio.

As shown in FIG. 6, the downstream end of the washing water passage 13 is connected to a passage switching valve 24, and the washing water pipe 17 and the washing water pipe 25 are extended from the passage switching valve 24, and The washing water discharge nozzle 26 connected to the downstream end of the pipe 25 may be opened at the bottom of the bowl portion 2 and directed to the S trap 3. According to the above configuration, a large flow of cleaning water flows from the flow path switching valve 24 to the cleaning water pipe 17, and a bubble flow of cleaning water is discharged from the cleaning water discharge nozzle 20 along the inner wall surface of the bowl portion 2. The inner wall surface of the bowl portion 2 above the water boundary line is washed, and then a large flow of washing water flows from the flow path switching valve 24 to the washing water pipe 25, and the washing water discharge nozzle 26 penetrating through the bottom of the bowl portion 2 The cleaning water containing no bubbles is discharged toward the S trap 3 to drive the stored water in the bowl portion 2 toward the S trap 3 to cause a siphon phenomenon, thereby discharging the sewage in the bowl portion 2 at once to an external discharge pipe. Then, a small flow of washing water is flowed from the flow path switching valve 24 to the washing water pipe 17, and the washing water having a small bubble content is washed out with the washing water discharge nozzle 20.
The water can be discharged along the inner wall surface of the bowl portion 2 to form stored water. By discharging the wash water from the wash water discharge nozzle 26 to drive the pool water in the bowl portion 2, the occurrence of the siphon phenomenon is promoted, and the sewage discharge function of the flush toilet is enhanced. When the level of the stored water in the bowl portion 2 rises due to the discharge of the wash water from the wash water discharge nozzle 20, the washing water discharged from the wash water discharge nozzle 26 is switched to the discharge of the wash water from the wash water discharge nozzle 26. Is added to the accumulated water driving action due to the rise in the level of the accumulated water. As a result, the function of driving the stored water to be discharged from the cleaning water discharge nozzle 26 is enhanced. Since air is not mixed into the cleaning water discharged from the cleaning water discharge nozzle 26,
The cleaning water can be discharged from the cleaning water discharge nozzle 26 at a high speed without reducing the flow velocity of the cleaning water due to air mixing. As a result, the function of driving the stored water to be discharged from the cleaning water discharge nozzle 26 is enhanced.

An air mixing device having a backflow prevention function may be used. As shown in FIG. 7, a check valve 29 including a movable valve body 29a and a valve seat 29b is attached to an air pipe member 28b of the air mixing device 28 extending from the washing water pipe member 28a. To face the valve seat 29 b, the valve body supporting portion 28b ₁ to the air pipe member 28b is formed. The supporting portion 28b ₁ has a plurality of ventilation grooves 28b ₂ is formed. The valve body 29a is made of a material having a smaller density than the cleaning water. In aerating apparatus 28 is in a normal state, the valve body 29a of the check valve 29 away from the valve seat 29b by its own weight abuts against the support portion 28b _1. The air sucked into the air pipe member 28b is
Through 8b _2, it is mixed in the washing water flowing in the cleaning water pipe member 28a. When wash water from the washing water pipe member 28a from flowing back into the air pipe member 28b, the valve element 29a which receives the urging force from the washing water flowing back away from the support portion 28b _1, pressed against the valve seat 29b. As a result, the air pipe member 28
b is closed to prevent the washing water from leaking out. The check ring 29 comprising the valve element 29a and the valve seat 29b has a simple structure and can be easily manufactured. Since the density of the valve body 29a is smaller than that of the washing water, even when the backflow speed of the washing water is low, the valve body 29a is reliably pressed against the valve seat 29b by the backflowing washing water, and water leakage is reliably prevented. Since the valve body 29a is separated from the valve seat 29b when the flush toilet is not flushed, the flush water in the flush water pipe to which the aeration device 28 is connected can be replaced with air when the flush toilet is not flushed. It is a target. The backflow prevention mechanism of the washing water attached to the aeration device is not limited to the backflow prevention valve 29. A labyrinth may be provided in the air pipe member to suppress the backflow of the washing water, or the backflow may be prevented by any other method.

It is desirable that the aeration devices 18, 18 ′, 28 are disposed downstream in the vicinity of the valve unit 6. When the toilet flush is stopped, a negative pressure is generated in the flush water pipe 17 near the valve unit 6 due to the inertial movement of the flush water in the flush water pipe 17. The negative pressure causes a water hammer. By disposing the aeration devices 18, 18 ', 28 downstream near the valve unit 6, the generation of the negative pressure is suppressed, and the generation of a water hammer is suppressed.

[0055]

As can be understood from the above description, in the flush toilet according to the present invention, the bubble flow is effectively used to save water for washing the inner wall surface of the bowl portion and sanitize the washing of the inner wall surface of the bowl portion. This achieves noise reduction and enhanced cleaning power on the inner wall surface of the bowl.

[Brief description of the drawings]

FIG. 1 is a perspective view in which a part of a flush toilet according to an embodiment of the present invention is seen through.

FIG. 2 is a configuration diagram of a valve unit included in the flush toilet according to the embodiment of the present invention.

FIG. 3 is a sectional view of an aeration device provided in the flush toilet according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of an air mixing device and a cleaning water discharge nozzle directly connected to each other.

FIG. 5 is a cross-sectional view of a bulging portion provided in the middle of a washing water pipe.

FIG. 6 is a partial configuration diagram of a modified example of the valve unit.

FIG. 7 is a structural diagram of an air mixing device having a backflow prevention function. (A) is a side sectional view, and (b) is b- in (a).
It is an arrow b view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Siphon-type toilet body 2 Bowl part 3 S trap 4 Overhang 6 Valve unit 18, 18 ', 28 Air mixing device 20, 26 Wash water discharge nozzle 21 Air introduction pipe 29 Backflow prevention valve

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiro Shinkawa 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term (reference) 2D039 AC05 BB01 DA04 DB04 DB05 DB06

Claims (25)

[Claims] 1. A toilet body having a bowl portion for storing flush water as stored water, a flush water supply means for supplying flush water to the flush body, an air mixing means for sucking air into the flush water, and A flush toilet, comprising: first flush water discharge means for discharging mixed flush water substantially horizontally along an inner wall surface of a bowl portion above a stationary interface of stored water. 2. A flush toilet according to claim 1, further comprising a flush water flow control means for controlling a flush water flow rate. 3. The flush toilet according to claim 1, wherein the flush water supply means is a means for supplying flush water directly from a water supply pipe to the toilet body. 4. The flush toilet according to claim 1, wherein an overhang is formed at an upper end of the inner wall surface of the bowl portion. 5. The flush toilet according to claim 4, wherein the first flush water discharging means is disposed immediately below the overhang. 6. One end communicates with the aeration means and the other end is connected to the first
The flush toilet according to any one of claims 1 to 5, further comprising a flush water pipe communicating with the flush water discharge means. 7. An air introduction pipe having one end communicating with the air mixing means and the other end being opened.
The flush toilet according to any one of claims 6 to 7. 8. A cleaning water pipe having one end communicating with the air mixing means and the other end communicating with the cleaning water discharging means, and an air introducing pipe having one end communicating with the air mixing means and having the other end opened. The flush toilet according to any one of claims 1 to 5, wherein the water pipe and the air introduction pipe extend substantially in parallel. 9. The flush toilet according to claim 7, wherein the air introducing pipe has a bulging portion. 10. The flush toilet according to claim 7, wherein the air introducing pipe has a washing water discharging means for discharging the washing water flowing backward from the air mixing means. 11. The flush toilet according to claim 10, wherein the flush water discharge means is a slope of an air introduction pipe descending toward the other open end. 12. The flush toilet according to claim 7, wherein the open other end of the air introduction pipe is opened on the inner wall surface of the bowl portion of the toilet body. 13. The flush toilet according to claim 1, wherein the air mixing means is disposed immediately adjacent to the flush water discharging means. 14. The flush toilet according to any one of claims 1 to 5, wherein the air mixing means and the flush water discharging means are directly connected. 15. The flush toilet according to claim 6, wherein the flush water pipe has a bulging portion. 16. The flush toilet according to claim 15, wherein the flush water pipe upstream of the bulge and the flush water pipe downstream of the bulge are eccentric to each other. 17. The flush toilet according to claim 1, further comprising air mixing amount adjusting means. 18. The flush toilet according to claim 1, further comprising a second flush water discharging means for discharging flush water for driving the stored water in the bowl portion. 19. The flush toilet according to claim 18, further comprising discharge switching means for switching between discharge of the wash water from the first wash water discharge means and discharge of the wash water from the second wash water discharge means. . 20. The flush toilet according to claim 18 or 19, wherein the second flush water discharge means discharges only flush water. 21. The flush toilet according to claim 7, wherein the air introduction pipe has a backflow prevention means for preventing backflow of the washing water from the air mixing means. 22. A backflow prevention means, comprising: a movable valve body;
22. The flush toilet according to claim 21, wherein the valve body has a valve seat that can be brought into contact with the valve body, and the valve body is pressed against the valve seat by flush water flowing backward from the air mixing means. 23. The flush toilet according to claim 22, wherein the density of the valve body is lower than the density of the flush water. 24. The flush toilet according to claim 22, wherein the valve body is separated from the valve seat when the flush toilet is not flushed. 25. The washing water supply means has a supply control means for controlling the start and stop of supply of the washing water to the first washing water discharge means, and the air mixing means is arranged downstream in the vicinity of the supply control means. The flush toilet according to any one of claims 1 to 24, wherein the flush toilet is provided.