JP2006241698A - Flush toilet bowl - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flush toilet bowl which can downsize a pressure accumulation container for storing pressurized flush water therein. <P>SOLUTION: The flush toilet bowl (1) is flushed with water directly supplied from a feed pipe of waterworks, and has a bowl section (2) provided with rim outlets at an upper portion thereof; a trap section (4) communicating between a bottom of the bowl section and a drain pipe; a jet nozzle (6) for ejecting flush water toward the trap section; the pressure accumulation container (12) for storing therein flush water supplied from the feed pipe of the waterworks in such a state that the flush water is pressurized to a pressure higher than that of tap water; a spout valve (20) arranged on a downstream side of the pressure accumulation container, and opened at the time of flushing the bowl section, to thereby eject the flush water from the jet nozzle; and pressurizing means (14, 16, 18) for increasing water pressure in the pressure accumulation container, for spouting from the jet nozzle in the following flushing, during current spouting operation from the rim outlets. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet that supplies at least a portion of flush water directly from a water supply pipe.

In recent years, flush toilets directly connected to water supply have become widespread. This flush toilet flush toilet does not require a flush tank to store flush water, so the overall flush toilet can be kept low, and the floor area occupied by the flush toilet can be reduced. Since it can be made smaller, it is widely adopted.
However, in flush toilets directly connected to the water supply system, the cleaning water is discharged from the rim spout and jet nozzle by the water pressure of the tap water. There is a problem that can not be.

  Japanese Patent Laying-Open No. 2004-137857 (Cited Document 1) describes a toilet cleaning device. In this toilet flushing device, in order to increase the washing power, the flushing toilet flushing water is pressurized to tap water pressure and stored in the pressure accumulator, and when washing, the pressurized flushing water is injected from the jet nozzle. Then the toilet bowl is washed.

JP 2004-137857 A

  However, in the toilet bowl cleaning apparatus described in Japanese Patent Application Laid-Open No. 2004-137857, the pressure accumulator is directly pressurized with tap water pressure, so that the pressure in the pressure accumulator cannot be made higher than the tap water pressure in principle. For this reason, even if the pressurized washing water in the pressure accumulator is ejected from the jet nozzle, a relatively large amount of washing water is required to induce the siphon action, and the pressure accumulator becomes large. There is. If the pressure accumulator becomes large in this way, the entire flush toilet including the accumulator will also be enlarged, and the merit for the tank flush flush toilet that collects wash water in the tank will be lost. .

In addition, in the toilet bowl cleaning apparatus described in Japanese Patent Application Laid-Open No. 2004-137857, the pressure accumulator is directly pressurized with tap water pressure, so that the washing water in the pressure accumulator is discharged and then added for the next cleaning. In principle, the pressurized wash water must be accumulated in the accumulator after a single wash sequence of the flush toilet has been completed. For this reason, in the toilet bowl washing | cleaning apparatus described in Unexamined-Japanese-Patent No. 2004-137857, there exists a problem that a toilet bowl cannot be used immediately after completion | finish of the washing sequence of a flush toilet bowl after use.
Strictly speaking, the tap water pressure is slightly lower when water is discharged than when the water is stopped. In this specification, the tap water pressure means the water pressure when the water is stopped.

Therefore, an object of the present invention is to provide a flush toilet capable of reducing the size of a pressure accumulating container that stores pressurized wash water.
Another object of the present invention is to provide a flush toilet that can be used immediately after the washing sequence is completed.

  In order to solve the above-described problems, the present invention provides a flush toilet that directly supplies at least a portion of flush water from a water supply pipe, and a ball portion provided with a rim spout at an upper portion thereof. A trap part that connects the bottom part of the ball part and the drainage pipe, a jet nozzle that is arranged at the bottom part of the ball part and injects the cleaning water toward the trap part, and the cleaning water supplied from the water supply pipe A pressure accumulating container for storing in a state pressurized to a pressure higher than the water pressure, and provided on the downstream side of the pressure accumulating container, is opened when cleaning the ball portion, and jets pressurized washing water in the pressure accumulating container. A water discharge valve for injecting from the nozzle, and a pressurizing means for increasing the water pressure in the pressure accumulator for water discharge from the next jet nozzle while the wash water is being discharged from the rim water discharge port. It is said.

  In the present invention configured as described above, the wash water supplied from the water supply pipe is pressurized to a pressure higher than the tap water pressure by the pressurizing means and stored in the pressure accumulating vessel. At the time of toilet flushing, the water discharge valve is opened, and the wash water stored in the pressure accumulating container is jetted from the jet nozzle. The dirt and cleaning water in the ball part are discharged to the drainage pipe through the trap part. The pressurizing means increases the water pressure in the pressure accumulating vessel for the next water discharge from the jet nozzle while the cleaning water is being discharged from the rim water discharge port into the ball portion.

  According to the flush toilet of the present invention configured as described above, since the wash water pressurized to a pressure higher than the tap water pressure is ejected from the jet nozzle, the toilet flushing ability sufficient with less wash water can be exhibited. The pressure accumulating container for storing pressurized washing water can be reduced in size. Further, according to the flush toilet of the present invention configured as described above, the flushing of the pressure accumulating container is performed while flushing water is being spouted from the rim spout into the ball portion, and thus the toilet flushing sequence is completed. Soon afterwards, a flush toilet can be used.

In the present invention, preferably, water discharge from the rim water discharge port and water discharge from the jet nozzle are simultaneously performed at least during a portion of the time during which the ball portion is washed.
According to the flush toilet of the present invention configured as described above, water discharge from the rim spout and water discharge from the jet nozzle are performed simultaneously, so that the toilet cleaning capability is improved and the toilet cleaning time is shortened. Thereby, the usability of the flush toilet can be improved.

  In the present invention, it is preferable that the pressurizing unit stores energy when the washing water stored in the pressure accumulating vessel is pressurized, and a check valve provided on the upstream side of the pressure accumulating vessel. An on-off valve having an inlet end and an outlet end connected to a branch pipe branched from a pipe from the water supply pipe to the check valve, and the on-off valve is opened when The wash water supplied from the water supply pipe is released to the outlet side end, and when it is closed or when the flow path is reduced, the water pressure at the inlet side end is increased, whereby the pressurized wash water is stored in the accumulator vessel. When the ball portion is cleaned by repeatedly opening and closing it so as to be fed in, the energy accumulated in the energy accumulating means is released, and pressurized washing water in the pressure accumulating vessel is jetted from the jet nozzle.

  In the present invention configured as described above, the open / close valve connected to the branch pipe branched from the pipe extending from the water supply pipe to the check valve repeatedly opens and closes. When the on-off valve is opened, the washing water supplied from the water supply pipe escapes to the outlet side end of the on-off valve, and when the on-off valve is closed, the flow of the washing water is blocked, so that the on-off valve The water pressure at the inlet end of the water rises. When the water pressure at the inlet side end increases, the cleaning water flows into the pressure accumulating container through the check valve, and the cleaning water in the pressure accumulating container is pressurized. Energy is stored in the energy storage means by pressurizing the wash water in the pressure storage container. When cleaning the ball part, the energy stored in the energy storage means is released, and the pressurized cleaning water in the pressure accumulating container is sprayed from the jet nozzle.

  According to this invention comprised in this way, the wash water pressurized to the pressure higher than a tap water pressure can be stored in a pressure accumulation container based on a tap water pressure. Thereby, sufficient toilet bowl washing | cleaning capability can be exhibited with little washing water.

In the present invention, preferably, after the water is discharged from the jet nozzle, the cleaning water released from the outlet side end when the pressurized cleaning water is fed into the pressure accumulating container by opening and closing the on-off valve is Water is discharged from the rim spout formed at the top.
In the present invention configured as above, the on-off valve repeatedly opens and closes, and the wash water that has escaped to the outlet side end of the on-off valve is discharged from the rim spout and used for washing the toilet.
According to the present invention configured as described above, the accumulated water in the pressure accumulating container can be stored, and at the same time, the waste water generated during the pressure accumulating can be effectively used for cleaning the toilet bowl.

In this invention, Preferably, an energy storage means is an elastic body arrange | positioned so that an elastic energy may be stored when the pressure of the washing water in a pressure accumulation container increases.
In this invention comprised in this way, when the pressure of the washing water in a pressure accumulation container becomes high, an elastic body will deform | transform and elastic energy will be stored in an elastic body. When the ball portion is washed, the elastic energy accumulated in the elastic body is released, and pressurized washing water in the pressure accumulating container is jetted from the jet nozzle.
According to the present invention configured as described above, the deformation amount of the elastic body and the accumulated energy can be arbitrarily set, so that the degree of freedom in designing the energy accumulating means can be increased.

In the present invention, preferably, the pressurizing means includes a pump for sending pressurized washing water into the pressure accumulating container, and an energy accumulating means for accumulating energy by pressurizing the washing water stored in the accumulating container. Have.
In the present invention configured as described above, the washing water pressurized by the pump is sent into the pressure accumulating container, and energy is accumulated in the energy accumulating means.
According to the present invention configured as described above, by appropriately selecting a pump to be used, it is possible to arbitrarily set the pressure for pressurizing the pressure accumulating container and the time required for pressurization.

  In the present invention, preferably, the pressurizing means includes a piston slidably disposed in the pressure accumulating container, an elastic body that urges the piston to pressurize the cleaning water in the pressure accumulating container, and the elastic body. And an actuator that moves the piston against the biasing force, and when cleaning the ball portion, the cleaning water stored in the pressure accumulating container is sprayed by the biasing force of the elastic body.

In this invention comprised in this way, an actuator moves the piston arrange | positioned slidably in a pressure accumulation container against the urging | biasing force by an elastic body. The washing water flows into the pressure accumulating container whose internal volume is expanded by moving the piston. When cleaning the ball part, the cleaning water stored in the pressure accumulating container is sprayed by the urging force of the elastic body.
According to the present invention configured as described above, by appropriately selecting the actuator and the elastic body to be used, the pressure for pressurizing the pressure accumulating container and the time required for pressurization can be arbitrarily set.

In the present invention, it is preferable that the pressurizing unit stores the air in the other space of the pressure accumulating container by sending air into one space of the pressure accumulating container isolated by the isolating means that partitions the inside of the pressure accumulating container. And an air pump for raising the water pressure of the tap water.
In the present invention configured as described above, the air pump feeds air into one space of the pressure accumulating vessel partitioned by the separating means. When the air is sent in, the isolating means is pressed, and the tap water stored in the other space of the pressure accumulating container is pressurized.
According to this invention comprised in this way, the tap water in a pressure accumulation container can be pressurized using an air pump.

According to the flush toilet of the present invention, a pressure accumulating container for storing pressurized wash water can be reduced in size.
Moreover, according to the flush toilet of this invention, it can be used immediately after the washing | cleaning sequence is complete | finished.

Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
First, the flush toilet according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic cross-sectional view of a flush toilet according to a first embodiment of the present invention. Moreover, FIG. 2 is the block diagram which extracted and illustrated the part of the pressure accumulator built in the flush toilet of this embodiment. Furthermore, FIG. 3 is a schematic sectional view of a direct acting solenoid type electromagnetic valve used in the pressure accumulator.

  As shown in FIGS. 1 and 2, the flush toilet 1 according to the first embodiment of the present invention includes a ball portion 2, a trap portion 4 that communicates a bottom portion of the ball portion and a drain pipe (not shown), It has the jet nozzle 6 arrange | positioned at the bottom part of the ball | bowl part 2, and the pressure accumulator 10 which pressurizes the wash water supplied to this jet nozzle 6. FIG. The flush toilet 1 of the present embodiment stores the wash water pressurized to a tap water pressure or higher in the pressure accumulator 10, and jets the wash water pressurized when the ball part 2 is washed from the jet nozzle 6 to trap part 4. It is designed to induce a siphon phenomenon.

Moreover, the pressure accumulator 10 built in the flush toilet 1 according to the first embodiment of the present invention pressurizes the pressure accumulating container 12 for storing pressurized washing water and the washing water in the pressure accumulating container 12. And a balloon 14 as energy storage means for storing energy. Further, the pressure accumulating device 10 includes a check valve 16 provided on the inlet side of the pressure accumulating vessel 12 and an open / close valve 18 connected to a branch pipe branched from a pipe line extending from the water supply pipe 8 to the check valve 16. And a water discharge valve 20 for injecting pressurized wash water in the pressure accumulating container 12 from the jet nozzle. The balloon 14, the check valve 16, and the on-off valve 18 constitute a pressurizing unit.
The flush toilet 1 includes a controller 22 that switches between rim water discharge cleaning and jet nozzle cleaning and controls the on-off valve 18 and the water discharge valve 20.

The ball portion 2 is configured so as to receive an filth by opening upward. Further, a rim portion 2a is formed around the upper portion of the ball portion 2, and cleaning water discharged from a rim water spouting port (not shown) flows downward while turning through the rim portion 2a. The wall surface is configured to be cleaned.
The trap part 4 is formed so as to extend obliquely upward from the bottom part of the ball part 2 and to extend vertically downward via the highest point 4a. The outlet end of the trap unit 4 is connected to a drain pipe (not shown) via a drain socket (not shown) or the like.

  The jet nozzle 6 is disposed at the bottom of the ball part 2 and is directed so as to inject cleaning water in parallel with the pipe line on the inlet side of the trap part 4. The jet nozzle 6 is supplied with wash water pressurized to a tap water pressure or higher by the pressure accumulator 10 and jets high-pressure wash water.

  Switching of the water discharged from the rim water spouting port (not shown) and the jet nozzle 6 at the time of cleaning the ball unit 2 is performed by a toilet flushing valve unit (not shown) and a controller 22 that controls the toilet bowl cleaning valve unit. The toilet flushing valve unit (not shown) is configured to direct flushing water supplied from the water supply to the rim water spouting port or the pressure accumulator 10 by switching the valves. Wash water guided to the pressure accumulator 10 by a toilet flush valve unit (not shown) is supplied to the pressure accumulator 10 through the water supply pipe 8. Moreover, the wash water discharged from the rim water spouting port (not shown) is directly supplied from a toilet cleaning valve unit (not shown) through a pipe line (not shown) extending to the rim water spouting port.

  The pressure accumulating container 12 of the pressure accumulating device 10 is disposed inside the flush toilet 1 and below the ball portion 2 and the trap portion 4. Inside the pressure accumulating container 12, a pneumatic balloon 14 serving as energy storage means is disposed. The balloon 14 is configured such that when the cleaning water in the pressure accumulating container 12 is pressurized, the air in the balloon 14 is compressed and the volume is reduced. The energy obtained by compressing the air in the balloon 14 is accumulated as energy for jetting high-pressure washing water during washing. In addition, arbitrary fluids, such as inert gas, such as nitrogen and helium, can be used as a fluid enclosed with a balloon.

  The check valve 16 is disposed on the inlet side of the pressure accumulating container 12 so that the cleaning water in the pressure accumulating container 12 does not flow back to the water supply pipe 8 side through the inlet of the pressure accumulating container 12. For this reason, when the pressure on the water supply pipe 8 side is higher than that in the pressure accumulating vessel 12, the wash water flows into the pressure accumulating vessel 12 from the water supply pipe 8, but the pressure in the pressure accumulating vessel 12 is greater than that on the water supply pipe 8 side. Is higher, the washing water does not flow backward from the pressure accumulating vessel 12 to the water supply pipe 8 side.

  The on-off valve 18 is connected to a branch line 18 a branched from a pipe line extending from the water supply pipe 8 to the check valve 16. The on-off valve 18 includes an inlet-side end portion 18b and an outlet-side end portion 18c, and is configured to repeatedly open and close at high speed. Further, the outlet side end portion 18c is connected to a rim water spouting port (not shown) by a drain pipe 18d. When the on-off valve 18 is opened, the wash water supplied from the water supply pipe flows out from the inlet side end 18b to the outlet side end 18c. The washing water that has flowed out from the outlet side end 18c is discharged from a rim water spouting port (not shown) through the drain pipe 18d.

  Further, when the on-off valve 18 is closed, the water hammer phenomenon occurs because the flow of the cleaning water supplied from the water supply pipe from the inlet side end 18b to the outlet side end 18c is suddenly blocked. The water pressure in the vicinity of the inlet side end portion 18b is configured to increase. In the present embodiment, a direct acting solenoid type solenoid valve is used as the on-off valve 18 and is repeatedly opened and closed about 50 times per second. Opening and closing of the on-off valve 18 is controlled by the controller 22.

  The water discharge valve 20 is disposed on the outlet side of the pressure accumulation container 12. Further, the downstream side of the water discharge valve 20 is connected to the jet nozzle 6. Opening and closing of the water discharge valve 20 is controlled by the controller 22, and is configured such that pressurized wash water in the pressure accumulating container 12 is ejected from the jet nozzle 6 when opened.

  The controller 22 includes a CPU, a memory, and the like, and is configured to execute a predetermined toilet flushing sequence by controlling a toilet flushing valve unit (not shown), the on-off valve 18, the water discharge valve 20, and the like.

  Next, with reference to FIG. 3, the direct acting solenoid type electromagnetic valve used as the on-off valve 18 in the flush toilet 1 of this embodiment is demonstrated. As shown in FIG. 3, the on-off valve 18 includes a valve seat 24 formed at the inlet end 18b, a valve body 26 that reciprocates linearly so as to open and close the valve seat 24, and the valve body 26. It has a drive coil 28 that is an actuator that drives to the closing side, and a biasing spring 30 that biases the valve body 26 to the opening side.

The valve seat 24 has a circular opening, and is configured to be closed when the valve body 26 is seated and opened when the valve body 26 is separated.
The valve body 26 is configured to be driven by a driving coil 28 in a direction (vertical direction in FIG. 3) orthogonal to the opening surface of the valve seat 24 (horizontal surface in FIG. 3).

The driving coil 28 is disposed so as to surround a part of the valve body 26. When a current flows through the driving coil 28, a driving force is applied to the valve body 26 that is at least partially formed of a magnetic material, and the valve body 26 is seated on the valve seat 24 (vertically below in FIG. 3). Driven.
The urging spring 30 is engaged with the valve body 26 and urges the valve body 26 in a direction away from the valve seat 24 (vertically upward in FIG. 3). For this reason, when the current flowing through the drive coil 28 is stopped, the valve element 26 is separated from the valve seat 24 by the biasing force of the biasing spring 30.
With this configuration, the on-off valve 18 repeats opening and closing by intermittently turning on / off the current flowing through the driving coil 28.

  In the present embodiment, the on-off valve 18 is closed by the current flowing in the driving coil 28. Therefore, the on-off valve 18 is abruptly closed by increasing the driving force generated by the driving coil 28. Pressurization due to the water hammer phenomenon can be strengthened. On the other hand, since the urging force by the urging spring 30 is used to open the on-off valve 18, a large urging force is not necessary, and the spring can be formed with a thin wire, so the urging spring 30 is designed to be small. be able to. For this reason, it becomes possible to comprise the on-off valve 18 whole in a small size.

Next, the operation of the flush toilet 1 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 4 is a graph showing the flow rate of cleaning water flowing into the ball part 2 in the toilet flushing sequence of the flush toilet 1 according to the present embodiment.
First, during standby, the ball portion 2 of the flush toilet 1 is filled with sealed water up to the height of the highest point 4 a of the trap portion 4. The balloon 14 in the pressure accumulating container 12 is in a compressed state, and a predetermined amount of washing water pressurized to a predetermined pressure is stored in the pressure accumulating container 12. When the user operates a cleaning switch (not shown) of the flush toilet 1, the controller 22 starts the toilet cleaning sequence shown in FIG.

  First, the controller 22 sends a signal to a toilet flushing valve unit (not shown), and switches the toilet flushing valve unit so that flushing water supplied from the water supply is discharged from a rim spout (not shown). The cleaning water discharged from the rim water spouting port (not shown) cleans the wall surface of the ball part 2 while turning and raises the water level in the ball part 2.

  As shown by a solid line in FIG. 4, after the rim water discharge is performed for about 5 seconds, the controller 22 stops water discharge from the rim water discharge port (not shown) and sends a signal to the water discharge valve 20 to discharge the water discharge valve. 20 is released. As shown by the broken line in FIG. 4, when the water discharge valve 20 is opened, the balloon 14 of the pressure accumulating container 12 is inflated by releasing the accumulated energy, and the washing water in the pressure accumulating container 12 passes through the water discharge valve 20. Are ejected from the jet nozzle 6. The cleaning water ejected from the jet nozzle 6 flows into the trap unit 4 while entraining the cleaning water accumulated at the bottom of the ball unit 2 to fill the trap unit 4 with water. When the inside of the trap part 4 is filled with water, the inside of the trap part 4 becomes negative pressure due to the siphon phenomenon, and the cleaning water of the ball part 2 is sucked. Thereby, the filth and cleaning water in the ball part 2 are discharged through the trap part 4 to a drain pipe (not shown).

  In the flush toilet 1 of the present embodiment, since the pressurized wash water stored in the pressure accumulating container 12 is jetted from the jet nozzle 6, the wash water is ejected from the jet nozzle 6 by tap water pressure. Siphoning is induced by a jet of wash water much less than the toilet bowl. In the flush toilet 1 of the present embodiment, wash water pressurized to about 0.5 MPa is jetted from about 0.5 L (liter) jet nozzle 6.

  As shown in FIG. 4, after water discharge from the jet nozzle 6 is performed for about 4 seconds, the controller 22 closes the water discharge valve 20 and sends a signal to the on-off valve 18 to start opening / closing of the on-off valve 18. . When the on-off valve 18 is opened, the wash water supplied from the water supply pipe 8 passes through the on-off valve 18 and the drain pipe 18d, and passes through the rim spout formed in the ball part 2 to enter the ball part 2. Is discharged. Further, when the on-off valve 18 is shut off, the water hammer phenomenon in which the washing water near the inlet end 18b of the on-off valve 18 is pressurized due to a rapid change in the speed of the washing water flowing through the on-off valve 18 is caused. The pressure near the inlet end 18b increases instantaneously. Due to this action, the water pressure upstream of the check valve 16 also rises, so that the wash water supplied from the water supply pipe 8 flows into the pressure accumulating vessel 12 through the check valve 16. Thereby, pressure accumulation in the pressure accumulation container 12 is started by the pressurizing means during the rim water discharge immediately after the water discharge from the jet nozzle 6 is completed.

  The pressure of the cleaning water that rises instantaneously due to the water hammer phenomenon is much higher than the tap water pressure of the cleaning water supplied to the water supply pipe 8. For this reason, even after the washing water flows into the pressure accumulating vessel 12 and the pressure in the pressure accumulating vessel 12 reaches the tap water pressure, the washing water supplied from the water supply pipe 8 is pressurized by the water hammer phenomenon, and the check valve 16 flows into the pressure accumulating vessel 12. Further, at the moment when the on-off valve 18 is opened, the water pressure near the inlet side end 18b decreases, but the check valve 16 prevents the backflow of the washing water in the pressure accumulating vessel 12 and the high pressure in the pressure accumulating vessel 12 is reached. Is maintained. When the pressure in the pressure accumulating container 12 rises, the balloon 14 disposed in the pressure accumulating container 12 is compressed, and the volume of the balloon 14 is reduced. As a result, energy obtained by compressing the balloon 14 is accumulated in the balloon 14.

  When the pressure in the pressure accumulating container 12 rises to a predetermined pressure, the controller 22 stops the opening / closing of the on-off valve 18 and closes the on-off valve 18. Thereby, the pressure accumulation to the pressure accumulation container 12 is completed. Further, the controller 22 sends a signal to the toilet flushing valve unit (not shown) to discharge flush water from the toilet flushing valve unit directly to the rim spout (not shown). About 20 seconds after the start of cleaning, the water level in the ball part 2 is raised to the standby level, and one toilet cleaning sequence is completed. In the graph of FIG. 4, even in the rim water discharge after the jet water discharge, the cleaning water having the same flow rate as the rim water discharge before the jet water discharge is drawn into the ball part 2. In this rim water discharge, there is a period during which a part of the washing water flows into the pressure accumulating vessel 12, and during that period, the flow rate flowing into the ball portion 2 is slightly reduced.

According to the flush toilet of the first embodiment of the present invention, the water hammer phenomenon, which is generally undesirable, is used in reverse, and the wash water pressurized to a pressure higher than the tap water pressure is accumulated. Can be stored in a container.
Further, according to the flush toilet of the present embodiment, the wash water pressurized to a pressure higher than the tap water pressure is ejected from the jet nozzle, so that a siphon phenomenon can be generated in the trap portion with a small amount of wash water. . Thereby, it becomes possible to miniaturize the pressure accumulating container for storing the washing water, and the whole flush toilet can be miniaturized.

  Furthermore, according to the flush toilet of this embodiment, since the wash water pressurized to a pressure higher than the tap water pressure is ejected from the jet nozzle, a flush toilet with a direct water connection is installed in an area where the tap water pressure is low It becomes possible to do. Although the flush toilet of this embodiment supplies a part of the wash water from the pressure accumulator and supplies the rest directly from the water supply, the accumulator is very small and is a conventional tank-type flush toilet. Since the configuration is completely different from that of the first embodiment, here, the flush toilet including the flush toilet according to the present embodiment is referred to as a flush toilet with a direct connection to a water supply.

Further, according to the flush toilet of the present embodiment, the pressure accumulation in the pressure accumulating container is started during the rim water discharge after jet water discharge, and the pressure accumulation is completed. A toilet bowl can be used.
Furthermore, according to the flush toilet of the present embodiment, the wash water flowing out from the on-off valve when accumulating pressure is discharged into the ball part from the rim spout, so that the accumulated pressure can be obtained while effectively using the waste water generated during accumulating pressure. At the same time, rim water can be discharged.
In the above-described embodiment, the open / close valve repeats the opened state and the completely closed state at the time of pressure accumulation, but the open / close valve is opened and the flow path is more than this state. It may be configured to repeat the reduced state. Since the flow rate of tap water is also changed by such an operation of the on-off valve, the tap water in the pressure accumulating vessel can be pressurized. In the present specification, “the on-off valve repeats opening and closing” also means such an operation of the on-off valve.
In the above-described embodiment, a balloon containing air is used as the energy storage means. Instead of the balloon, a piston that can slide in the pressure accumulating container and an elastic body that urges the piston are used. The energy storage means can also be constituted by a certain spring.
Further, in the above-described embodiment, pressure accumulation is performed at the time of rim water discharge after jet water discharge, but it may be configured to perform pressure accumulation at the first rim water discharge.

  Next, with reference to FIG. 5, the 1st modification of the flush toilet by 1st Embodiment of this invention is demonstrated. The flush toilet of this modification differs from the first embodiment in the toilet flushing sequence controlled by the controller. FIG. 5 is a graph showing the flow rate of the wash water flowing into the ball portion in the toilet flushing sequence of the flush toilet according to this modification.

  In the flush toilet according to the first embodiment of the present invention, as shown in FIG. 4, the rim water discharge was stopped after the rim water discharge for about 5 seconds, and the water discharge from the jet nozzle was performed. In the flush toilet, as shown by the solid line in FIG. 5, rim water discharge is performed consistently during toilet flushing. As shown by the broken line in FIG. 5, in the flush toilet of this modification, water discharge from the jet nozzle is started about 5 seconds after the start of toilet cleaning, but during this time, rim water discharge is not stopped, and the rim and jet Water is discharged at the same time. In the flush toilet of the present modification as well, as with the flush toilet according to the first embodiment, the water discharged from the jet nozzle is jetted by the wash water stored in the pressure accumulating container, so the water discharged from the jet nozzle Even if the operation is started, the flow rate of the rim water is not lowered.

  Furthermore, water discharge from the jet nozzle is completed about 8 seconds after the start of toilet cleaning. Next, simultaneously with the start of pressure accumulation in the pressure accumulation container, waste water generated during pressure accumulation is discharged from the rim spout. Furthermore, after the pressure accumulation in the pressure accumulating container is completed, water is discharged directly from the toilet flushing valve unit to the rim spout.

  According to the flush toilet of the present modified example, the water discharged from the jet nozzle is performed simultaneously with the rim water discharge, so that the cleaning power can be further improved and the time required for cleaning the toilet can be shortened. Thereby, the usability of the flush toilet can be improved.

  Next, with reference to FIG. 6, the 2nd modification of the flush toilet by 1st Embodiment of this invention is demonstrated. The flush toilet of this modification differs from the first embodiment in the toilet flushing sequence controlled by the controller. FIG. 6 is a graph showing the flow rate of the washing water flowing into the ball portion in the toilet flushing sequence of the flush toilet according to this modification.

  As shown in FIG. 6, in the flush toilet of this modification, jet water spouting is performed twice in one toilet flushing sequence. As shown by the broken line in FIG. 6, water discharge from the first jet nozzle is performed about 3 seconds after the toilet cleaning is started. Furthermore, the first jet water spouting is stopped after about 5 seconds, and at the same time, pressure accumulation in the pressure accumulation container is started. Next, about 7.5 seconds after the start of toilet flushing, a second jet water discharge is performed from the pressure accumulator. Further, after about 11 seconds, the second water discharge from the jet nozzle is stopped, and at the same time, the second pressure accumulation in the pressure accumulation container is started.

  On the other hand, as shown by the solid line in FIG. 6, rim water discharge is performed consistently from the start of toilet flushing to the end of the toilet flushing sequence. It should be noted that the rim water discharged from the end of the first jet water discharge until the start of the second jet water discharge, and the rim water discharged for a predetermined time after the second jet water discharge ends, the wash water that has passed through the on-off valve is the rim water outlet. The water is discharged from.

  According to the flush toilet of this modification, water discharge from the jet nozzle is performed twice, so that the cleaning power can be further improved.

  Further, in the above-described modification, there is one pressure accumulating container, and after completion of the first jet water discharge, the pressure accumulation is performed again and the second jet water discharge is performed, but for the first and second jet water discharges. Two pressure accumulating containers may be provided. In this case, a switching valve (not shown) is provided between each pressure accumulating container and the jet nozzle, and jet switching is performed twice by appropriately switching the switching valve. In this case, a switching valve (not shown) is also provided between the branch pipe and the check valve provided at the inlet of each pressure accumulating vessel, and the switching valve is appropriately switched, Accumulated pressure in each accumulator vessel.

  In the first embodiment described above, a balloon containing air is used as the energy storage unit. However, air that is not contained in the balloon is stored in the pressure accumulating container, and the air is used as the energy storage unit. May be used. Alternatively, a piston connected to an elastic body such as a spring acting as an energy storage means is slidably disposed in the pressure accumulating container, and when the pressure of the washing water in the pressure accumulating container increases, the elastic body has elastic energy. Can be configured to be stored.

  Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a schematic cross-sectional view of a flush toilet according to the second embodiment of the present invention. The flush toilet according to this embodiment is different from the first embodiment in that the washing water in the pressure accumulating container is pressurized by an electromagnetic pump. Therefore, only the points of the second embodiment different from the first embodiment will be described here.

  As shown in FIG. 7, a flush toilet 201 according to the second embodiment of the present invention includes a ball unit 202, a trap unit 204, a jet nozzle 206, and a pressure accumulating device that pressurizes cleaning water supplied to the jet nozzle 206. 210.

Moreover, the pressure accumulating device 210 built in the flush toilet 201 according to the second embodiment of the present invention includes a pressure accumulating container 212 and a balloon 214 which is an energy accumulating means. Furthermore, the pressure accumulator 210 includes a check valve 216 provided on the inlet side of the pressure accumulator vessel 212, an electromagnetic pump 218 that is a pump disposed in a pipe line between the water supply pipe 208 and the check valve 216, And a water discharge valve 220 for injecting pressurized washing water in the pressure accumulating vessel 212 from the jet nozzle. The balloon 214, the check valve 216, and the electromagnetic pump 218 constitute a pressurizing unit.
The flush toilet 201 includes a controller 222 that switches between rim water discharge cleaning and jet nozzle cleaning and controls the electromagnetic pump 218 and the water discharge valve 220.

  A rim portion 202 a is formed around the upper portion of the ball portion 202. The trap part 204 is formed so as to extend obliquely upward from the bottom of the ball part 202 and extend vertically downward via the highest point 204a. The exit end of the trap part 204 is connected to a drain pipe (not shown) via a drain socket (not shown) or the like.

The jet nozzle 206 is disposed at the bottom of the ball portion 202 and is configured to inject cleaning water pressurized by the pressure accumulator 210 to a tap water pressure or higher.
Switching of water discharged from the rim water spouting port (not shown) and the jet nozzle 206 at the time of cleaning the ball portion 202 is performed by a toilet flushing valve unit (not shown) and a controller 222 that controls the toilet bowl cleaning valve unit. Wash water guided to the pressure accumulator 210 by a toilet flush valve unit (not shown) is supplied to the pressure accumulator 210 through the water supply pipe 208. Moreover, the wash water discharged from the rim water spouting port (not shown) is directly supplied from a toilet cleaning valve unit (not shown) through a pipe line (not shown) extending to the rim water spouting port.

Inside the pressure accumulating vessel 212 of the pressure accumulating device 210, a pneumatic balloon 214 as an energy accumulating means is arranged.
The check valve 216 is disposed on the inlet side of the pressure accumulating vessel 212 so that the cleaning water in the pressure accumulating vessel 212 does not flow back to the water supply pipe 208 side through the inlet of the pressure accumulating vessel 212.

  The electromagnetic pump 218 is disposed in a pipe line between the water supply pipe 208 and the check valve 216, and is configured to send pressurized washing water into the pressure accumulating vessel 212 through the check valve 216. . The operation of the electromagnetic pump 218 is controlled by the controller 222.

The water discharge valve 220 is disposed on the outlet side of the pressure accumulation container 212. The downstream side of the water discharge valve 220 is connected to the jet nozzle 206. The opening and closing of the water discharge valve 220 is controlled by the controller 222.
The controller 222 includes a CPU, a memory, and the like, and is configured to control a toilet flushing valve unit (not shown), the electromagnetic pump 218, the water discharge valve 220, etc., and to execute a predetermined toilet flushing sequence.

Next, the operation of the flush toilet 201 according to the second embodiment of the present invention will be described.
First, during standby, sealed water is stored in the ball portion 202 of the flush toilet 201 up to the height of the highest point 204 a of the trap portion 204. In addition, a predetermined amount of wash water pressurized to a predetermined pressure is stored in the pressure accumulating vessel 212. When the user operates a cleaning switch (not shown) of the flush toilet 201, the controller 222 starts a predetermined toilet cleaning sequence.

First, the controller 222 controls a toilet flush valve unit (not shown) to discharge water from a rim water spouting port (not shown).
After the rim water discharge is performed for a predetermined time, the controller 222 stops water discharge from a rim water discharge port (not shown) and opens the water discharge valve 220. When the water discharge valve 220 is opened, the cleaning water in the pressure accumulating vessel 212 is ejected from the jet nozzle 206 through the water discharge valve 220. The washing water ejected from the jet nozzle 206 causes a siphon phenomenon, and the filth and the washing water in the ball part 202 are discharged from the trap part 204 to a drain pipe (not shown).

  In the flush toilet 201 of the present embodiment, since the pressurized washing water stored in the pressure accumulating vessel 212 is ejected from the jet nozzle 206, the siphon action is achieved by injection of much less washing water than the conventional flush toilet. Is triggered. In the flush toilet 201 of the present embodiment, wash water pressurized to about 0.5 MPa is ejected from an about 0.5 L (liter) jet nozzle 206.

  After discharging water from the jet nozzle 206 for a predetermined time, the controller 222 closes the water discharge valve 220 and starts the operation of the electromagnetic pump 218. In addition, the controller 222 sends a signal to a toilet flush valve unit (not shown), so that flush water supplied from the water supply is distributed to both the rim spout (not shown) and the water supply pipe 208. Switch the valve unit. Thereby, the pressure accumulation to the pressure accumulation container 212 and the rim water discharge are started simultaneously.

  Wash water introduced from the toilet flush valve unit (not shown) to the water supply pipe 208 is pressurized by the electromagnetic pump 218. The washing water pressurized by the electromagnetic pump 218 is sent into the pressure accumulating vessel 212 through the check valve 216. Further, since a part of the wash water supplied from the water supply is led to the water supply pipe 208 via the toilet flush valve unit (not shown), the water supply pressure is low during the rim water discharge. However, since the cleaning water supplied to the water supply pipe 208 is pressurized by the electromagnetic pump 218, high-pressure cleaning water can be stored in the pressure accumulating vessel 212 even when the supply water pressure is low.

  When the pressure in the pressure accumulating vessel 212 is increased by feeding the pressurized washing water, the balloon 214 disposed in the pressure accumulating vessel 212 is compressed, and the volume of the balloon 214 is reduced. Thereby, energy obtained by compressing the balloon 214 is accumulated in the balloon 214. When the pressure in the pressure accumulating vessel 212 rises to a predetermined pressure, the controller 222 stops the electromagnetic pump 218 and ends the pressure accumulating in the pressure accumulating vessel 212. In addition, since the check valve 216 is provided at the inlet of the pressure accumulating vessel 212, even if the electromagnetic pump 218 is stopped, the washing water in the pressure accumulating vessel 212 does not flow backward to the water supply pipe 208 side. The inside of the container 212 is maintained at a high pressure. Furthermore, the controller 222 sends a signal to a toilet flushing valve unit (not shown) to switch the toilet flushing valve unit so as to distribute the flushing water only to the rim water spouting. After a predetermined time has elapsed, the water level in the ball unit 202 is raised to the standby level, and one toilet cleaning sequence is completed.

According to the flush toilet of the second embodiment of the present invention, the wash water pressurized to a pressure higher than the tap water pressure can be stored in the accumulator vessel using the electromagnetic pump.
Further, according to the flush toilet of the present embodiment, the pressure accumulation in the pressure accumulating container is started during the rim water discharge after jet water discharge, and the pressure accumulation is completed. A toilet bowl can be used.
Furthermore, according to the flush toilet of this embodiment, since the pressure accumulation to the pressure accumulating container is performed using an electromagnetic pump, the pressure in the pressure accumulating container and the pressure accumulating time can be set relatively freely.

Next, a flush toilet according to a third embodiment of the present invention will be described with reference to FIG. FIG. 8 is a schematic cross-sectional view of a flush toilet according to a third embodiment of the present invention. The flush toilet according to this embodiment is different from the first embodiment in that the flush water in the pressure accumulating container is pressurized with a piston biased by a spring. Therefore, only the points of the third embodiment different from the first embodiment will be described here.
As shown in FIG. 8, a flush toilet 301 according to a third embodiment of the present invention includes a ball portion 302, a trap portion 304, a jet nozzle 306, and a pressure accumulator that pressurizes wash water supplied to the jet nozzle 306. 310.

In addition, the pressure accumulating device 310 built in the flush toilet 301 according to the third embodiment of the present invention includes a pressure accumulating container 312, a piston 313 slidably disposed in the pressure accumulating container 312, and an elastic body. And a certain spring 314. Furthermore, the pressure accumulator 310 includes a check valve 316 provided on the inlet side of the pressure accumulator vessel 312, a motor 318 that is an actuator that moves the piston 313 against the biasing force of the spring 314, and the pressure accumulator vessel 312. And a water discharge valve 320 for injecting the pressurized wash water from the jet nozzle. The piston 313, the spring 314, and the motor 318 constitute a pressurizing unit.
The flush toilet 301 includes a controller 322 that switches between rim water discharge cleaning and jet nozzle cleaning and controls the motor 318 and the water discharge valve 320.

  A rim portion 302 a is formed around the upper portion of the ball portion 302. The trap portion 304 is formed so as to extend obliquely upward from the bottom of the ball portion 302 and extend vertically downward via the highest point 304a. The outlet end of the trap unit 304 is connected to a drain pipe (not shown) through a drain socket (not shown) or the like.

The jet nozzle 306 is disposed at the bottom of the ball portion 302 and is configured to inject cleaning water pressurized by the pressure accumulator 310 to a tap water pressure or higher.
Switching of water discharged from the rim water spouting port (not shown) and the jet nozzle 306 at the time of cleaning the ball portion 302 is performed by a toilet flushing valve unit (not shown) and a controller 322 that controls the toilet flushing valve unit. Wash water guided to the pressure accumulator 310 by a toilet flush valve unit (not shown) is supplied to the pressure accumulator 310 through the water supply pipe 308. Moreover, the wash water discharged from the rim water spouting port (not shown) is directly supplied from a toilet cleaning valve unit (not shown) through a pipe line (not shown) extending to the rim water spouting port.

Inside the pressure accumulating container 312 of the pressure accumulating device 310, a piston 313 and a spring 314 for biasing the piston 313 are arranged. The piston 313 is urged by the spring 314 in the direction of pushing out the washing water in the pressure accumulating container 312.
A clutch 318a is attached to the output shaft of the motor 318, and the clutch 318a is configured to transmit power from the output shaft of the motor 318 to the winding shaft 318b. Further, a winding wire 318c is wound around the winding shaft 318b, and the winding wire 318c is connected to the piston 313. When the motor 318 is driven and the winding shaft 318b is rotated, the winding wire 318c is wound up and the piston 313 is moved against the biasing force of the spring 314. The operations of the motor 318 and the clutch 318a are controlled by the controller 222.

The check valve 316 is disposed on the inflow side of the pressure accumulating vessel 312 so that the cleaning water in the accumulator vessel 312 does not flow back to the water supply pipe 308 side through the inlet of the accumulator vessel 312.
The water discharge valve 320 is disposed on the outlet side of the pressure accumulation container 312. Further, the downstream side of the water discharge valve 320 is connected to the jet nozzle 306. Opening and closing of the water discharge valve 320 is controlled by the controller 322.

  The controller 322 includes a CPU, a memory, and the like, and is configured to control a toilet flushing valve unit (not shown), a motor 318, a clutch 318a, a water discharge valve 320, and the like to execute a predetermined toilet flushing sequence. Yes.

Next, the operation of the flush toilet 301 according to the third embodiment of the present invention will be described with reference to FIG.
First, at the time of standby, the ball portion 302 of the flush toilet 301 is filled with sealed water up to the height of the highest point 304 a of the trap portion 304. In addition, a predetermined amount of washing water pressurized to a predetermined pressure is stored in the pressure accumulating vessel 312. That is, the output shaft of the motor 318 and the winding shaft 318b are separated by the clutch 318a, and the cleaning water in the pressure accumulating vessel 312 is compressed via the piston 313 by the urging force of the compressed spring 314. When the user operates a cleaning switch (not shown) of the flush toilet 301, the controller 322 starts a predetermined toilet cleaning sequence.

First, as shown by the solid line in FIG. 4, the controller 322 controls the toilet flush valve unit (not shown) to discharge water from a rim water spouting port (not shown).
After rim water discharge is performed for about 5 seconds, the controller 322 stops water discharge from a rim water discharge port (not shown) and opens the water discharge valve 320. As shown by the one-dot chain line in FIG. 4, when the water discharge valve 320 is opened, the cleaning water in the pressure accumulating vessel 312 is pushed out by the urging force of the spring 314 and is ejected from the jet nozzle 306 through the water discharge valve 320. . The cleaning water ejected from the jet nozzle 306 generates a siphon phenomenon, and the filth and cleaning water in the ball unit 302 are discharged from the trap unit 304 to a drain pipe (not shown).

  In the flush toilet 301 of the present embodiment, since the pressurized wash water stored in the pressure accumulating vessel 312 is ejected from the jet nozzle 306, siphon action is achieved by injection of much less wash water than the conventional flush toilet. Is triggered. In the flush toilet 301 of the present embodiment, wash water pressurized to about 0.5 MPa is jetted from about 0.5 L (liter) jet nozzle 306. Further, the instantaneous flow rate of the cleaning water that is pushed out by the urging force of the spring 314 and indicated by the one-dot chain line in FIG. 4 changes more slowly than the instantaneous flow rate of the cleaning water that is pushed out by the balloon 14 that is indicated by the broken line in FIG. . For this reason, in the biasing by the spring, a period in which the instantaneous flow rate is large continues for a certain time, but the maximum value of the instantaneous flow rate is smaller than that in the case of the balloon.

  After discharging water from the jet nozzle 306 for a predetermined time, the controller 322 closes the water discharge valve 320. At the same time, the controller 322 connects the clutch 318a, operates the motor 318, and rotates the winding shaft 318b. When the winding shaft 318b is rotated, the piston 313 is wound up against the biasing force of the spring 314 by the winding wire 318c. When the piston 313 is wound up by the motor 318 and the spring 314 is compressed, elastic energy is accumulated in the spring 314.

  In addition, the controller 322 sends a signal to a toilet flushing valve unit (not shown), so that flush water supplied from the water supply is distributed to both the rim spout (not shown) and the water supply pipe 308. Switch the valve unit. Thereby, pressure accumulation to the pressure accumulation container 312 and rim water discharge are started simultaneously.

  Wash water introduced from the toilet bowl washing valve unit (not shown) to the water supply pipe 308 flows into the pressure accumulating vessel 312 through the check valve 316. Further, since a part of the wash water supplied from the water supply is guided to the water supply pipe 308 via a toilet flush valve unit (not shown), the water supply pressure is lowered during rim water discharge. However, in the process in which the piston 313 is wound up by the motor 318, the pressure in the pressure accumulating vessel 312 becomes low. Therefore, even when the feed water pressure is low, the wash water flows into the pressure accumulating vessel 312 through the check valve 316. be able to. On the other hand, since the flow rate distributed to the water supply pipe 308 from the toilet flushing valve unit (not shown) can be set to be small, a sufficient flow rate of wash water is allocated to the rim spout even during pressure accumulation in the pressure accumulation container 312. be able to.

  When the piston 313 is wound up to a predetermined position and the inside of the pressure accumulating container 312 becomes full, the controller 322 stops the motor 318 and disconnects the clutch 318a. As a result, the cleaning water in the pressure accumulating container 312 is pressurized by the urging force of the spring 314. Since the check valve 316 is provided at the inlet of the pressure accumulator vessel 312, even if the clutch 318a is disconnected and the wash water in the pressure accumulator vessel 312 is pressurized, the wash water in the pressure accumulator vessel 312 is supplied as water. There is no back flow toward the tube 308 side, and the inside of the pressure accumulating vessel 312 is maintained at a high pressure. Furthermore, the controller 322 sends a signal to a toilet flushing valve unit (not shown) to switch the toilet flushing valve unit so as to distribute the flushing water only to the rim water spouting. After a predetermined time elapses, the water level in the ball unit 302 is raised to the standby level, and one toilet cleaning sequence is completed.

According to the flush toilet of the third embodiment of the present invention, the wash water pressurized to a pressure higher than the tap water pressure can be stored in the pressure accumulating container using a motor.
Further, according to the flush toilet of the present embodiment, the pressure accumulation in the pressure accumulating container is started during the rim water discharge after jet water discharge, and the pressure accumulation is completed. A toilet bowl can be used.
Furthermore, according to the flush toilet of this embodiment, since the pressure accumulation to the pressure accumulating container is performed using the motor, the pressure in the pressure accumulating container and the pressure accumulating time can be set relatively freely.

  In the third embodiment, the clutch is disconnected immediately after the pressure accumulating container is full. However, the clutch can be disconnected at the same time as the water discharge valve is opened. In the case of such a configuration, the pressure by the biasing force of the spring does not act on the pressure accumulating container when the flush toilet is on standby. As a result, the time during which high water pressure acts in the pressure accumulating container can be made extremely short, and the safety and durability of the pressure accumulating container can be improved.

  Next, a flush toilet according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a diagram showing a configuration of a pressure accumulator for a flush toilet according to a fourth embodiment of the present invention. The flush toilet according to this embodiment is different from the first embodiment in that air is fed into the pressure accumulating container with an air pump to pressurize the wash water. Therefore, only the points of the fourth embodiment of the present invention different from the first embodiment will be described here.

  As shown in FIG. 9, the pressure accumulating device 410 used in the flush toilet of the fourth embodiment of the present invention is a pressure accumulating container 412 and a diaphragm which is a separating means provided so as to partition the inside of the accumulating container 412. 414 and an air pump 422 that feeds air into one space of the pressure accumulating vessel 412 partitioned by the diaphragm 414. Further, the pressure accumulator 410 includes an air check valve 424 that prevents the backflow of air introduced by the air pump 422, a pressure sensor 430 that measures the air pressure in the pressure accumulator vessel 412, and air in the pressure accumulator vessel 412 to the atmosphere. And an atmospheric release valve 426 for discharging. Further, the pressure accumulating device 410 includes a check valve 416 and an on-off valve 418 provided on the upstream side of the pressure accumulating vessel 412, a water discharge valve 420 provided on the upstream side of the pressure accumulating vessel 412, and tap water in the pressure accumulating vessel 412. And a limiter 428 for limiting the rise of the diaphragm 414 due to inflow. A limit switch 428a is attached to the limiter 428.

  Next, the operation of the pressure accumulator 410 used in the flush toilet of the fourth embodiment of the present invention will be described. First, the open / close valve 418 is opened with the atmosphere release valve 426 opened and the water discharge valve 420 closed. When the on-off valve 418 is opened, tap water flows into the pressure accumulating vessel 412 through the check valve 416. When the tap water flows into the pressure accumulating vessel 412, the diaphragm 414 rises. Accordingly, the air that has entered the space above the diaphragm 414 is released to the atmosphere through the atmosphere release valve 426. When the diaphragm 414 rises and reaches the height of the limiter 428 provided in the pressure accumulating vessel 412, the limit switch 428a attached thereto is turned on.

When the limit switch 428a is turned on, the on-off valve 418 is closed, the inflow of tap water into the pressure accumulating vessel 412 is stopped, and the atmosphere release valve 426 is also closed. Next, the air pump 422 is operated, and air is introduced into the space above the diaphragm 414 of the pressure accumulating vessel 412 via the air check valve 424. When air is introduced into the pressure accumulating vessel 412 and the air pressure in the pressure accumulating vessel 412 rises to a predetermined pressure, the pressure sensor 430 detects it and stops the air pump 422. Thereby, pressure accumulation is completed. When performing toilet flushing, the water discharge valve 420 is opened, and pressurized tap water is injected from the jet nozzle through the water discharge valve 420.
In addition, since the toilet bowl washing | cleaning sequence is the same as that of the flush toilet bowl of 1st Embodiment, description is abbreviate | omitted.
According to the flush toilet of the fourth embodiment of the present invention, the tap water in the pressure accumulating container can be pressurized by the air pump.

  As mentioned above, although preferable embodiment of this invention was described, a various change can be added to embodiment mentioned above. For example, in the above-described embodiment, the water discharge valve is closed immediately after the discharge of the wash water stored in the pressure accumulator vessel is completed and the jet water discharge is terminated, but the wash water in the pressure accumulator vessel has been discharged. Thereafter, the water discharge valve may be opened for a predetermined time, and during that time jet water discharge may be performed by tap water pressure.

1 is a schematic cross-sectional view of a flush toilet according to a first embodiment of the present invention. It is the block diagram which extracted and illustrated the part of the pressure accumulator built in the flush toilet according to 1st Embodiment of this invention. It is a schematic sectional drawing of the direct acting solenoid type | mold solenoid valve currently used for the pressure accumulator. It is a graph which shows the flow volume of the wash water which flows into a ball | bowl part in the toilet bowl washing | cleaning sequence of the flush toilet bowl by 1st Embodiment of this invention. It is a graph which shows the flow volume of the wash water which flows into a ball | bowl part in the toilet bowl washing | cleaning sequence of the flush toilet by the 1st modification of 1st Embodiment of this invention. It is a graph which shows the flow volume of the wash water which flows into a ball | bowl part in the toilet bowl washing | cleaning sequence of the flush toilet by the 2nd modification of 1st Embodiment of this invention. It is a schematic sectional drawing of the flush toilet bowl by 2nd Embodiment of this invention. It is a schematic sectional drawing of the flush toilet according to 3rd Embodiment of this invention. It is a figure which shows the structure of the pressure accumulator of the flush toilet by 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flush toilet according to the first embodiment of the present invention 2 Ball part 4 Trap part 4a Highest point 6 Jet nozzle 8 Water supply pipe 10 Pressure accumulator 12 Pressure accumulator 14 Balloon 16 Check valve 18 On-off valve 18a Branch pipe 18b Inlet side end Portion 18c Outlet side end 18d Drain pipe 20 Water discharge valve 22 Controller 24 Valve seat 26 Valve body 28 Driving coil 30 Energizing spring 201 Flush toilet 202 according to the second embodiment of the present invention 202 Ball portion 204 Trap portion 204a Maximum point 206 Jet nozzle 208 Water supply pipe 210 Pressure accumulator 212 Pressure accumulator vessel 214 Balloon 216 Check valve 218 Electromagnetic pump 220 Water discharge valve 222 Controller 301 Flush toilet according to the third embodiment of the present invention 302 Ball section 304 Trap section 304a Highest point 306 Jet nozzle 308 Water supply pipe 310 accumulator 312 accumulator vessel 313 piston 314 spring 316 check valve 318 motor 318a clutch 318b hoist shaft 318c hoist wire 320 water discharge valve 322 controller 410 pressure accumulator 412 pressure accumulator vessel 414 diaphragm 416 air discharge valve 418 424 Air check valve 426 Atmospheric release valve 428 Limiter 428a Limit switch 430 Pressure sensor

Claims (8)

A flush toilet that supplies at least a portion of flush water directly from a water supply pipe,
A ball portion with a rim spout at the top;
A trap portion that communicates the bottom of the ball portion with the drain pipe;
A jet nozzle that is disposed at the bottom of the ball portion and injects cleaning water toward the trap portion;
A pressure accumulating container for storing the wash water supplied from the water supply pipe in a state of being pressurized to a pressure higher than the tap water pressure;
A water discharge valve that is provided on the downstream side of the pressure accumulating vessel and is opened when the ball portion is washed, and sprays pressurized washing water in the pressure accumulating vessel from the jet nozzle;
A pressurizing means for increasing the water pressure in the pressure accumulating vessel for water discharge from the next jet nozzle while washing water is being discharged from the rim water spouting port;
A flush toilet characterized by having.   2. The flush toilet according to claim 1, wherein water discharged from the rim water spouting port and water discharged from the jet nozzle are simultaneously performed during at least part of the time during which the ball portion is washed.   The pressurizing means includes an energy accumulating means for accumulating energy by pressurizing the wash water stored in the accumulator, a check valve provided on the upstream side of the accumulator, and the water supply pipe And an open / close valve having an inlet end and an outlet end connected to a branch pipe branched from a pipe extending from the pipe leading to the check valve, and when the open / close valve is opened, the water supply When the wash water supplied from the pipe is released to the outlet side end and closed or when the flow path is reduced, the water pressure at the inlet side end is increased so that the pressurized wash water is stored in the pressure accumulating container. When the ball portion is repeatedly opened and closed so as to be fed into the water, the energy accumulated in the energy accumulating means is released, and the pressurized washing water in the pressure accumulating vessel is injected from the jet nozzle. Claim 1 or Flush toilet as claimed.   After discharging water from the jet nozzle, when the pressurized washing water is sent into the pressure accumulating container by opening and closing the on-off valve, the washing water released from the outlet side end is put on the upper part of the ball part. 4. The flush toilet according to claim 3, wherein water is discharged from the formed rim spout.   The pressure accumulating device according to claim 3 or 4, wherein the energy accumulating means is an elastic body arranged to store elastic energy when the pressure of the washing water in the pressure accumulating vessel increases.   The pressurizing means has a pump for sending pressurized washing water into the pressure accumulating container, and an energy accumulating means for accumulating energy when the washing water stored in the accumulating container is pressurized. Item 3. A flush toilet according to item 1 or 2.   The pressurizing means is slidably disposed in the pressure accumulating container, an elastic body that urges the piston to pressurize the cleaning water in the pressure accumulating container, and resists the urging force of the elastic body. And an actuator for moving the piston, and when washing the ball portion, the washing water stored in the pressure accumulating vessel is jetted by the urging force of the elastic body. toilet bowl.   Water supply stored in the other space of the pressure accumulating vessel by the pressurizing means separating the inside of the pressure accumulating vessel and sending air into one space of the pressure accumulating vessel isolated by the isolating means The flush toilet according to claim 1, further comprising an air pump that raises the water pressure of the water.

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