JP2021025287A - Washing water tank device, and flush toilet bowl device including the same - Google Patents

Abstract

To provide a washing water tank device using electric power generated by itself for supplying washing water into a flush toilet bowl, and a flush toilet bowl device including the same.SOLUTION: A washing water tank device (4) includes a water storage tank (10) formed with a drain port (10a), a drain valve (12) for opening/closing the drain port, a drain valve water pressure driving part (14) utilizing the water supply pressure of supplied service water for driving the drain valve, a water drainage control device (18) for supplying/stopping the supply of the supplied service water to the drain valve water pressure driving part, a solenoid valve (20) for controlling valve opening/closing for the water drainage control device, a water supply valve (19) for supplying/stopping the supply of the water to the water storage tank, a branch part (33) for allowing the supplied service water to flow into each of the water drainage control device and the water supply valve, and an electric generator (16) for generating electric power to operate the solenoid valve, the electric generator being provided in a water path on the downstream side of the branch part and on the upstream side of the water supply valve or in the water path on the downstream side of the water supply valve.SELECTED DRAWING: Figure 2

Description

The present invention relates to a flush water tank device, and more particularly to a flush water tank device that supplies flush water to a flush toilet using its own electric power, and a flush toilet device including the same.

Japanese Unexamined Patent Publication No. 2009-257061 (Patent Document 1) describes a low tank device. This low tank device includes a hydraulic cylinder device, and is configured to operate the hydraulic cylinder device by the hydraulic pressure of the supplied water and open the drain valve of the low tank. Further, in this low tank device, the supply and stop of water to the hydraulic cylinder device are controlled by the solenoid valve, and the opening and closing of the drain valve is controlled based on the operation of the solenoid valve. That is, when the supplied water flows into the hydraulic cylinder device by operating the solenoid valve, the piston in the hydraulic cylinder is pushed up, and the movement of this piston pulls up the drain valve and opens the drain valve. .. Further, when the supply of water to the hydraulic cylinder device is stopped by the solenoid valve, the drain valve is closed.

Further, Japanese Patent Application Laid-Open No. 10-311073 (Patent Document 2) describes a tank device for a toilet bowl. In this toilet tank device, a solenoid valve to which a water supply pipe is connected is provided on the upper side surface of the tank body, and a turbine is connected to the outflow side of the solenoid valve. A generator is attached to this turbine, and the circuit board has a rectifying circuit that converts AC power from the generator into DC, a battery that is charged by the DC current from this rectifying circuit, and the power from this battery. An operating electromagnetic valve control circuit is provided.

Japanese Unexamined Patent Publication No. 2009-257061 Japanese Unexamined Patent Publication No. 10-311073

However, in the low tank device described in Patent Document 1, since the hydraulic cylinder device is operated by a solenoid valve, there is a problem that the hydraulic cylinder device cannot be installed in an environment where an external power source cannot be secured. Further, the low tank device (washing water tank device) is provided with a generator like the toilet tank device described in Patent Document 2, electric power is generated by the water flow of the supplied water, and the electromagnetic valve is operated by this electric power. It is possible to make it. In this way, if power is generated by the flow of water supplied to the washing water tank device and all the power consumed by the electromagnetic valve can be covered by this power, patent document 1 also describes an environment in which an external power source cannot be secured. It is possible to install a washing water tank device as shown in the above.

However, in recent years, water saving of flush toilet devices has progressed, and the amount of wash water used in one flush toilet has become very small. For this reason, the amount of water supplied to the wash water tank device for each toilet bowl wash is small, and in order to secure the required power with such a small amount of water, it is necessary to increase the flow velocity, and as a result, the generator Pressure loss in increases. When the pressure loss in the generator increases, the water force of the supplied water weakens, and it is expected that the drain valve cannot be opened and closed by the hydraulic cylinder device as in the device described in Patent Document 1.

Therefore, an object of the present invention is to provide a flush toilet device that supplies flush water to a flush toilet by using the electric power generated by itself, and a flush toilet device including the same.

In order to solve the above-mentioned problems, the present invention is a washing water tank device that supplies washing water to a washing stool by using the electric power generated by itself, and provides washing water to be supplied to the washing stool. It is supplied with a water storage tank in which a drain port is formed for storing the stored wash water and discharging the stored wash water to the flush toilet, and a drain valve that opens and closes the drain port to supply and stop the wash water to the flush toilet. Water supply and stop to the drain valve hydraulic drive unit that drives the drain valve and the drain valve hydraulic drive unit so that the supplied tap water flows into the drain valve hydraulic drive unit using the water supply pressure of the tap water. A drainage control device that controls the opening and closing of the drainage control device, and a water supply valve that supplies and stops the water supply tank so that the supplied tap water flows into the water storage tank. It has a branch part that branches the supplied tap water, one of which flows into the drainage control device, and the other of which flows into the water supply valve, and a generator that generates electric power for operating the electromagnetic valve by a water flow. The generator is characterized in that it is provided in a water channel on the downstream side of the branch portion and on the upstream side of the water supply valve, or in a water channel on the downstream side of the water supply valve.

In the present invention configured in this way, the generator generates electric power by the water flow, and the electromagnetic valve is operated by this electric power. The solenoid valve controls the opening and closing of the drainage control device to supply and stop the supplied tap water to the drainage valve hydraulic drive unit so that the supplied tap water flows into the drainage valve hydraulic drive unit. In addition, the water supply valve supplies and stops water to the water storage tank so that the supplied tap water flows into the water storage tank. On the other hand, the supplied tap water is branched at the branch portion, one of which flows into the drainage control device and the other of which flows into the water supply valve. The generator is provided in the water channel on the downstream side of the branch portion and on the upstream side of the water supply valve, or in the water channel on the downstream side of the water supply valve.

According to the present invention configured as described above, since the generator is provided in the water channel on the downstream side of the branch portion and on the upstream side of the water supply valve or the water channel on the downstream side of the water supply valve, the drainage control device can be used. The generator does not give pressure loss to the flow of water supplied to the drain valve hydraulic drive unit. It has been demonstrated by the research and development of the present inventor that the drain valve can be sufficiently driven by the drain valve hydraulic drive unit by arranging the generator in this way. This makes it possible to provide a flush water tank device that supplies flush water to a flush toilet using the electric power generated by itself.

In the present invention, preferably, the generator is provided in the water channel on the downstream side of the water supply valve.
According to the present invention configured in this way, since the generator is provided in the water channel on the downstream side of the water supply valve, the pressure loss due to the generator is less likely to affect the drain valve hydraulic drive unit, and more reliably. The drain valve hydraulic drive unit can be operated.

In the present invention, preferably, the water channel on the downstream side of the water supply valve is provided with a second branch portion for branching the water flowing out from the water supply valve, one of which flows into the water storage tank and the other of which flows into the flush toilet, to generate electricity. The machine is provided on the upstream side of the second branch.

According to the present invention configured in this way, since the generator is provided on the downstream side of the water supply valve and on the upstream side of the second branch portion, the water to be flown into the water storage tank and the flush toilet, respectively. It is possible to generate electricity by using the above, and it is possible to secure a sufficient amount of power generation while reliably operating the drain valve hydraulic drive unit.

In the present invention, preferably, the water flowing out from the water supply valve is guided to the generator through the flexible pipe.
If air stays in the pipeline that supplies water to the generator, the power generation efficiency of the generator will decrease. According to the present invention configured as described above, the water flowing out from the water supply valve is guided to the generator via the flexible pipe, so that the flexible pipe easily vibrates when the washing water tank device is used and is inside. The stagnant air can be effectively discharged. As a result, it is possible to prevent a decrease in power generation efficiency in the generator.

In the present invention, preferably, the drainage control device stops the supply of water to the drainage valve hydraulic drive unit after the drainage valve is opened and before the water supply valve is closed.
According to the present invention configured as described above, the water supply to the drain valve hydraulic drive unit is stopped after the drain valve is opened. Therefore, after the drain valve is opened, the washing water tank The entire amount of water supplied to the device can be used for power generation, and a sufficient amount of power generation can be secured while the drain valve is surely opened by the drain valve hydraulic drive unit.

In the present invention, preferably, the water level detecting device for detecting the water level in the water storage tank is provided, and when the water level detecting device detects a predetermined water level, the drainage control device is stopped.

According to the present invention configured in this way, when the water level detection device detects a predetermined water level, the drainage control device is closed, so that the opening of the drainage valve is detected more reliably and the water is drained at an appropriate time. The control device can be closed, and a sufficient amount of power generation can be secured while the drain valve is surely opened.

Further, the present invention is a flush toilet device, characterized in that it includes a flush water tank device of the present invention and a flush toilet device that is washed with wash water supplied from the wash water tank device.

According to the washing water tank device of the present invention and the flush toilet device provided with the washing water tank device, the washing water can be supplied to the flush toilet using the electric power generated by itself.

It is a perspective view which shows the whole flush toilet device provided with the washing water tank device by embodiment of this invention. It is sectional drawing which shows the schematic structure of the washing water tank apparatus by embodiment of this invention.

Next, a flush toilet device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view showing the entire flush toilet device including the flush water tank device according to the embodiment of the present invention. FIG. 2 is a cross-sectional view showing a schematic configuration of a washing water tank device according to an embodiment of the present invention.

As shown in FIG. 1, the flush toilet device 1 according to the embodiment of the present invention includes a flush toilet main body 2 which is a flush toilet and flush water according to the embodiment of the present invention mounted on the rear portion of the flush toilet main body 2. It is composed of a tank device 4. After the flush toilet device 1 of the present embodiment is used, a predetermined time elapses after the remote controller 6 mounted on the wall surface is operated or the motion sensor 8 provided on the toilet seat detects the user's leaving. As a result, the bowl portion 2a of the flush toilet body 2 is configured to be washed. The washing water tank device 4 according to the present embodiment discharges the washing water stored inside to the flush toilet body 2 based on the instruction signal from the remote control device 6 or the motion sensor 8, and the washing water is used to discharge the washing water to the bowl portion. It is configured to wash 2a. In the present embodiment, the motion sensor 8 is provided on the toilet seat, but the present invention is not limited to this embodiment, and the position where the user can detect sitting, leaving or approaching, leaving, or holding a hand. For example, it may be provided in the flush toilet body 2 or the flush water tank device 4. Further, the motion sensor 8 may be any as long as it can detect the user's sitting, leaving, approaching, leaving, and holding a hand. For example, an infrared sensor or a microwave sensor may be used as the motion sensor 8. Can be done.

As shown in FIG. 2, the washing water tank device 4 has a water storage tank 10 for storing wash water to be supplied to the flush toilet body 2, and a drain valve for opening and closing a drain port 10a provided in the water storage tank 10. It has a drain valve hydraulic drive unit 14 for driving the drain valve 12. Further, the washing water tank device 4 mainly has a drainage control device 18 for controlling water supply to the drainage valve hydraulic drive unit 14 and an electromagnetic valve 20 attached to the drainage control device 18 inside. Further, the washing water tank device 4 mainly has a water supply control valve 19 which is a water supply valve for controlling water supply to the water storage tank 10. As will be described later, the solenoid valve 20 is operated by the electric power generated by the generator 16 by the water flow flowing out from the water supply control valve 19.

The water storage tank 10 is a tank configured to store the washing water to be supplied to the flush toilet body 2, and a drain port 10a for discharging the stored washing water to the flush toilet body 2 is formed at the bottom thereof. Has been done. Further, in the water storage tank 10, an overflow pipe 10b is connected to the downstream side of the drain port 10a. The overflow pipe 10b rises vertically from the vicinity of the drain port 10a and extends above the surface of the washing water stored in the water storage tank 10. Therefore, the wash water flowing from the upper end of the overflow pipe 10b bypasses the drain port 10a and directly flows out to the flush toilet body 2.

The drain valve 12 is a valve body arranged so as to open and close the drain port 10a, and is opened by pulling the drain valve 12 upward, and the washing water in the water storage tank 10 is discharged to the flush toilet body 2. The bowl portion 2a is washed.

The drain valve hydraulic pressure drive unit 14 is configured to drive the drain valve 12 by utilizing the supply pressure of the washing water supplied from the water supply. Specifically, the drain valve hydraulic drive unit 14 is provided from a cylinder 14a into which water supplied from the drain control device 18 flows, a piston 14b slidably arranged in the cylinder 14a, and a lower end of the cylinder 14a. It has a rod 15 that protrudes and drives the drain valve 12. Further, a spring 14c is arranged inside the cylinder 14a to urge the piston 14b downward, and a packing 14e is attached to the piston 14b to be between the inner wall surface of the cylinder 14a and the piston 14b. Watertightness is ensured. A clutch mechanism 22 is provided in the middle of the rod 15, and the clutch 22 disconnects the rod 15 into an upper rod 15a and a lower rod 15b.

The cylinder 14a is a cylindrical member, and its axis is arranged in the vertical direction, and the piston 14b is slidably received inside. Further, an inflow pipe 24a is connected to the lower end of the cylinder 14a so that the water flowing out from the drainage control device 18 flows into the cylinder 14a. Therefore, the piston 14b in the cylinder 14a is pushed up by the water flowing into the cylinder 14a against the urging force of the spring 14c.

On the other hand, an outflow hole is provided at the upper end of the cylinder 14a, and the outflow pipe 24b communicates with the inside of the cylinder 14a through the outflow hole. Therefore, when water flows into the cylinder 14a from the inflow pipe 24a connected to the lower part of the cylinder 14a, the piston 14b is pushed upward from the lower part of the cylinder 14a which is the first position. Then, when the piston 14b is pushed up to the second position above the outflow hole, the water flowing into the cylinder 14a flows out from the outflow hole through the outflow pipe 24b. That is, the inflow pipe 24a and the outflow pipe 24b are communicated with each other via the inside of the cylinder 14a when the piston 14b is moved to the second position. The outflow pipe 24b extends downward from the cylinder 14a and allows water to flow out into the water storage tank 10. Therefore, the entire amount of the water flowing out of the cylinder 14a is stored in the water storage tank 10.

The rod 15 is a rod-shaped member connected to the lower surface of the piston 14b, and extends downward from the inside of the cylinder 14a through a through hole 14f formed in the bottom surface of the cylinder 14a. A drain valve 12 is connected to the lower end of the rod 15, and the rod 15 connects the piston 14b and the drain valve 12. Therefore, when water flows into the cylinder 14a and the piston 14b is pushed up, the rod 15 connected to the piston 14b lifts the drain valve 12 upward, and the drain valve 12 is opened.

Further, a gap 14d is provided between the rod 15 projecting from below the cylinder 14a and the inner wall of the through hole 14f of the cylinder 14a, and a part of the water flowing into the cylinder 14a flows out from the gap 14d. .. The water flowing out from the gap 14d flows into the water storage tank 10. Since the gap 14d is relatively narrow and the flow path resistance is large, the pressure in the cylinder 14a rises due to the water flowing from the inflow pipe 24a into the cylinder 14a even when water flows out from the gap 14d. The piston 14b is pushed up against the urging force of the spring 14c.

Further, a clutch mechanism 22 is provided in the middle of the rod 15. The clutch mechanism 22 is configured to disconnect the rod 15 into the upper rod 15a and the lower rod 15b when the rod 15 (drain valve 12) is lifted by a predetermined distance. When the clutch mechanism 22 is disconnected, the lower rod 15b is not linked to the movement of the upper part of the piston 14b and the upper rod 15a, and the lower rod 15b descends together with the drain valve 12 by gravity while resisting buoyancy.

Further, a drain valve float mechanism 26 is provided in the vicinity of the drain valve 12. In the drain valve float mechanism 26, after the rod 15 is lifted by a predetermined distance and the lower rod 15b is disconnected by the clutch mechanism 22, the lower rod 15b and the drain valve 12 are lowered to close the drain port 10a. Is configured to delay. Specifically, the drain valve float mechanism 26 has a float portion 26a and an engaging portion 26b interlocked with the float portion 26a.

The engaging portion 26b is configured to engage with the lower rod 15b that has been disengaged by the clutch mechanism 22 and descended, and to prevent the lower rod 15b and the drain valve 12 from descending and sitting on the drain port 10a. ing. Next, the float portion 26a descends as the water level in the water storage tank 10 drops, and when the water level in the water storage tank 10 drops to a predetermined water level, the float portion 26a rotates the engaging portion 26b to rotate the engaging portion 26b and the lower portion. The rod 15b is disengaged. When the engagement is released, the lower rod 15b and the drain valve 12 are lowered and seated at the drain port 10a. As a result, the closing of the drain valve 12 is delayed, and an appropriate amount of washing water is discharged from the drain port 10a.

Further, a vacuum breaker 30 is provided in the inflow pipe 24a between the drainage control device 18 and the drainage valve hydraulic drive unit 14. When the drainage control device 18 side becomes negative pressure by the vacuum breaker 30, the outside air is sucked into the inflow pipe 24a, and the backflow of water from the drainage valve hydraulic drive unit 14 side is prevented.

Next, the drainage control device 18 is configured to control water supply to the drainage valve hydraulic drive unit 14 based on the operation of the solenoid valve 20, and to control water supply and stoppage to the water storage tank 10. That is, the drainage control device 18 is connected from the water supply pipe 32 connected to the water supply to the first branch pipe 33a branched at the water supply pipe branch portion 33 which is a branch portion, and is based on the instruction signal from the controller 28. The water supplied from the first branch pipe 33a is controlled to be supplied to and stopped from the drain valve hydraulic drive unit 14. In the present embodiment, the entire amount of the water flowing out from the drainage control device 18 is supplied to the drainage valve hydraulic drive unit 14 through the inflow pipe 24a. A part of the water supplied to the drain valve hydraulic drive unit 14 flows out from the gap 14d between the inner wall of the through hole 14f of the cylinder 14a and the rod 15 and flows into the water storage tank 10. Most of the water supplied to the drain valve hydraulic drive unit 14 flows out of the cylinder 14a through the outflow pipe 24b and flows into the water storage tank 10.

In the present embodiment, the controller 28 has a built-in circuit board and a capacitor (not shown above). This circuit board is provided with a rectifying circuit that converts AC power from the generator 16 into DC, the capacitor is charged by the DC current from the rectifying circuit, and the electromagnetic power provided on the circuit board is generated by the power from the capacitor. The valve control circuit operates.

Further, the water supplied from the water supply passes through a water stop valve 32a arranged outside the water storage tank 10 and a constant flow valve 32b arranged in the water storage tank 10 on the downstream side of the water stop valve 32a. It reaches the water supply pipe branch portion 33 and is supplied to the drainage control device 18 from the first branch pipe 33a branched at the water supply pipe branch portion 33. The water stop valve 32a is provided to stop the supply of water to the washing water tank device 4 at the time of maintenance or the like, and is usually used in an opened state. The constant flow valve 32b is provided to allow water supplied from the tap water to flow into the drainage control device 18 at a predetermined flow rate, and a constant flow rate of water is discharged to the drainage control device 18 regardless of the installation environment of the flush toilet device 1. It is configured to be supplied to.

Further, a solenoid valve 20 is attached to the drainage control device 18, and water supply from the drainage control device 18 to the drainage valve hydraulic drive unit 14 is controlled based on the operation of the solenoid valve 20. Specifically, the controller 28 receives signals from the remote controller 6 and the motion sensor 8, and the controller 28 sends an electric signal to the solenoid valve 20 to operate it. The solenoid valve 20 is operated by electric power generated by a generator 16 and charged in a capacitor (not shown) built in the controller 28.

That is, the solenoid valve 20 moves the solenoid valve side pilot valve 18a built in the drainage control device 18 based on the signal sent from the controller 28, and opens the pilot valve port of the main valve body 18b of the drainage control device 18. It is configured to open and close. As a result, the main valve body 18b of the drainage control device 18 is opened and closed based on the operation of the solenoid valve 20, and water supply and stoppage to the drainage valve hydraulic drive unit 14 are controlled. In the present embodiment, as the solenoid valve 20, a bistable latching solenoid is used as the solenoid valve 20 in which the solenoid valve side pilot valve 18a is moved by once energizing and the state is maintained even when the energization is stopped. Has been done. In this type of solenoid valve 20, the solenoid valve side pilot valve 18a can be returned to the original position by energizing again in the opposite direction.

On the other hand, the second branch pipe 33b branched at the water supply pipe branch portion 33 is connected to the water supply control valve 19, is on the downstream side of the water supply pipe branch portion 33, and is connected to the water channel on the downstream side of the water supply control valve 19. A generator 16 is provided.
The water supply control valve 19 is configured to allow the water supplied from the second branch pipe 33b to flow out to the tank water supply pipe 25a. After passing through the generator 16, the water flowing into the tank water supply pipe 25a is branched into two at the tank water supply pipe branch 25b, which is the second branch, one in the water storage tank 10 and the other in the overflow pipe 10b. It flows out inside. Further, a vacuum breaker 31 is provided between the water supply control valve 19 and the generator 16. As a result, when the pressure on the second branch pipe 33b side becomes negative, it is possible to prevent water from flowing back from the tank water supply pipe 25a side to the water supply pipe 32. In the present embodiment, the tank water supply pipe 25a is formed of a flexible pipe, and is easily vibrated by the rotation of a water turbine (not shown) built in the generator 16. Therefore, even if air is mixed in the tank water supply pipe 25a, the air is easily discharged due to vibration, and the structure is such that the air is unlikely to stay in the tank water supply pipe 25a.

The water supply control valve 19 includes a water supply valve main body 19a, a main valve body 19b arranged in the water supply valve main body 19a, and a float side pilot valve 19c. Further, a water supply valve float 34 is connected to the water supply control valve 19, and the float side pilot valve 19c is configured to move according to the movement of the water supply valve float 34. That is, the float side pilot valve 19c controls the pressure in the pressure chamber provided in the water supply valve main body 19a by opening and closing the pilot valve port (not shown) provided in the water supply valve main body 19a. It is configured in.

The water supply valve float 34 is arranged in the water storage tank 10, rises as the water level of the water storage tank 10 rises, and moves the float side pilot valve 19c via the arm portion 34a. When the water level in the water storage tank 10 _{rises to the predetermined water level L 1} , the float side pilot valve 19c closes the pilot valve port (not shown) of the water supply valve main body 19a. When the pilot valve port is closed, the pressure in the pressure chamber in the water supply valve main body 19a rises, the main valve body 19b is moved, and the water supply control valve 19 is closed.

On the other hand, the generator 16 is provided in the middle of the water supply control valve 19 and the tank water supply pipe 25a on the downstream side of the vacuum breaker 31, and is configured to generate electric power based on the flow of water. The electric power generated by the generator 16 is sent to the controller 28 connected to the generator 16 and charged into a capacitor (not shown) built in the controller 28. Further, a float switch 29, which is a water level detection device, is connected to the controller 28, and the float switch 29 is arranged in the water storage tank 10 so that the water level in the water storage tank 10 is a predetermined distance from the _{predetermined water level L 1.} Detect that it has decreased.

Next, the operation of the washing water tank device 4 according to the embodiment of the present invention and the flush toilet device provided with the washing water tank device 4 will be described.
First, in the standby state for cleaning the toilet bowl, the water level in the water storage tank 10 is at the predetermined water level L ₁ , and the solenoid valve 20 is not energized. In this state, the pilot valve port of the main valve body 18b of the drainage control device 18 is in a closed state, and the drainage control device 18 is closed. Further, the pilot valve port of the main valve body 19b of the water supply control valve 19 is also closed, and the water supply control valve 19 is also closed. Next, when the user presses the cleaning button of the remote controller 6 (FIG. 1), the remote controller 6 transmits an instruction signal for cleaning the toilet bowl to the controller 28 (FIG. 4). In the flush toilet device 1 of the present embodiment, when a predetermined time elapses without pressing the wash button of the remote controller 6 after the user's departure is detected by the motion sensor 8 (FIG. 1). Also, a toilet bowl cleaning instruction signal is transmitted to the controller 28.

Upon receiving the toilet bowl cleaning instruction signal, the controller 28 energizes the solenoid valve 20 and separates the solenoid valve side pilot valve 18a from the pilot valve port of the main valve body 18b. As a result, the pressure in the pressure chamber of the drainage control device 18 is reduced, the main valve body 18b is separated from the valve seat, and the valve is opened. In the present embodiment, since the bistable latching solenoid is used as the solenoid valve 20, after the solenoid valve side pilot valve 18a is once opened, it is opened even if the energization is stopped. The valve state is maintained. When the drainage control device 18 is opened, the tap water supplied from the water supply pipe 32 to the drainage control device 18 via the water supply pipe branch portion 33 and the first branch pipe 33a flows through the drainage control device 18 to the inflow pipe. It flows into 24a.

Further, the water flowing into the inflow pipe 24a flows into the cylinder 14a of the drain valve hydraulic drive unit 14 and pushes up the piston 14b. As a result, the rod 15 and the drain valve 12 connected to the piston 14b are also pulled up, the drain port 10a is opened, and the bowl portion 2a of the flush toilet body 2 is washed.

Further, when water flows from the inflow pipe 24a into the cylinder 14a of the drain valve hydraulic drive unit 14 and the piston 14b is pushed up to the upper part of the cylinder 14a, the water in the cylinder 114a flows out through the outflow pipe 24b. Become. The water flowing out through the outflow pipe 24b flows into the water storage tank 10. Further, a part of the water flowing from the inflow pipe 24a into the cylinder 14a flows out from the gap 14d between the inner wall of the through hole 14f of the cylinder 14a and the rod 15, and this water flows into the water storage tank 10.

Further, when the washing water in the water storage tank 10 is discharged, the water level in the water storage tank 10 _{is lowered below the predetermined water level L 1} , so that the water supply valve float 34 is lowered. As a result, the arm portion 34a rotates, the float side pilot valve 19c is separated from the pilot valve port of the main valve body 19b, and the pilot valve port is opened. As a result, the pressure in the pressure chamber of the water supply valve main body 19a of the water supply control valve 19 decreases, and the main valve body 19b separates from the valve seat. When the water supply control valve 19 is opened, the tap water supplied from the water supply pipe 32 to the water supply control valve 19 via the water supply pipe branch portion 33 and the second branch pipe 33b is supplied to the tank through the water supply control valve 19. It flows into the pipe 25a. The water flowing into the tank water supply pipe 25a rotates a water turbine (not shown) of the generator 16 to generate electric power. The generated electric power is charged into a capacitor (not shown) built in the controller 28. The water that has passed through the generator 16 is branched at the tank water supply pipe branch portion 25b, a part of the water flows into the overflow pipe 10b, and the rest flows into the water storage tank 10.

On the other hand, when the float switch 29 detects that the water level in the water storage tank 10 has dropped to a water _{level L 2} which is a predetermined distance lower than the _{predetermined water level L 1, the float switch 29 indicates that the water level in the water storage tank 10 has dropped.} Signal is transmitted to the controller 28. When the controller 28 detects that the water level in the water storage tank 10 has dropped, it energizes the solenoid valve 20 and seats the solenoid valve side pilot valve 18a on the pilot valve opening of the main valve body 18b. As a result, the pressure in the pressure chamber of the drainage control device 18 rises, the main valve body 18b sits on the valve seat, and the valve is closed. In this way, the drainage control device 18 stops the supply of water to the drainage valve hydraulic drive unit 14 after the drainage valve 12 is opened and before the water supply control valve 19 is closed.

That is, in the present embodiment, since the bistable latching type solenoid is used as the solenoid valve 20, the solenoid valve 20 is energized with the solenoid valve side pilot valve 18a opened. The solenoid valve side pilot valve 18a can be closed. When the drainage control device 18 is closed, the supply of water to the drainage valve hydraulic drive unit 14 is stopped, and thereafter, the entire amount of tap water supplied from the water supply pipe 32 is stored through the water supply control valve 19. It is supplied into the tank 10 and used for power generation by the generator 16. In the present embodiment, when the float switch 29 _{detects that the water level in the water storage tank 10 has dropped to a predetermined water level L 2} , the controller 28 closes the drainage control device 18. On the other hand, as a modification, the present invention can be configured so that the controller 28 opens the drainage control device 18 and then closes the drainage control device 18 after a lapse of a predetermined time.

On the other hand, when the piston 14b is pushed up by the drain valve hydraulic drive unit 14 and the rod 15 and the drain valve 12 are pulled up to a predetermined position accordingly, the clutch mechanism 22 pulls the lower rod 15b and the drain valve 12 from the upper rod 15a. Separate. As a result, while the drainage control device 18 is opening, the upper rod 15a remains pushed upward together with the piston 14b, while the lower rod 15b and the drainage valve 12 are lowered by their own weight. However, the separated lower rod 15b engages with the engaging portion 26b of the drain valve float mechanism 26, and the lower rod 15b and the drain valve 12 are prevented from descending. As a result, even after the drainage control device 18 is closed, the drainage port 10a of the water storage tank 10 remains open, and drainage from the water storage tank 10 is continued.

Here, when the water level in the water storage tank 10 _{drops to a third} predetermined water level L _{3 which is lower than the predetermined water levels L 1} and L ₂ , the float portion 26a of the drain valve float mechanism 26 descends, which is the engaging portion 26b. To move. As a result, the engagement between the lower rod 15b and the engaging portion 26b is released, and the lower rod 15b and the drain valve 12 begin to descend again. After that, the drain valve 12 closes the drain port 10a of the water storage tank 10, and the discharge of the washing water to the flush toilet body 2 is stopped. Since the drainage control device 18 and the water supply control valve 19 are still in the opened state even after the drainage port 10a is closed, the water supplied from the water supply pipe 32 flows into the drainage valve hydraulic drive unit 14 and flows out. A part of the water that has passed through the water supply control valve 19 and flows into the water storage tank 10 through the pipe 24b flows into the water storage tank 10 through the tank water supply pipe 25a, so that the water level in the water storage tank 10 rises. ..

When the water level in the water storage tank 10 _{rises to the predetermined water level L 1} , the water supply valve float 34 rises, the float side pilot valve 19c is moved via the arm portion 34a, and the pilot valve port is closed. As a result, the pressure in the pressure chamber in the water supply valve main body 19a rises to close the main valve body 19b, and the water supply control valve 19 is closed. As a result, the water supply to the water storage tank 10 is stopped.

When the water supply control valve 19 is closed, the water supply from the water supply control valve 19 to the generator 16 is stopped, and the generation of electric power by the generator 16 is completed. On the other hand, when the supply of water to the drain valve hydraulic drive unit 14 is stopped by closing the drain control device 18, the piston 14b of the drain valve hydraulic drive unit 14 is pushed down by the urging force of the spring 14c. .. When the upper rod 15a is pushed down together with the piston 14b, the upper rod 15a and the lower rod 15b separated by the clutch mechanism 22 are reconnected. Therefore, the next time the toilet bowl is washed, the upper rod 15a and the lower rod 15b are both pulled up by the piston 14b. As a result, one toilet bowl cleaning is completed, and the flush toilet device returns to the standby state for toilet bowl cleaning.

According to the washing water tank device 4 of the embodiment of the present invention, since the generator 16 is provided in the water channel on the downstream side of the water supply pipe branch portion 33 and the downstream side of the water supply control valve 19, the drainage control device 18 The generator 16 does not give a pressure loss to the flow of water supplied from the drain valve hydraulic drive unit 14. By arranging the generator 16 in this way, the drain valve 12 can be sufficiently driven by the drain valve hydraulic drive unit 14. As a result, it is possible to provide the flush water tank device 4 that supplies flush water to the flush toilet body 2 by using the electric power generated by itself.

Further, according to the washing water tank device 4 of the present embodiment, since the generator 16 is provided on the downstream side of the water supply control valve 19 and on the upstream side of the tank water supply pipe branch portion 25b, the water storage tank 10 It is possible to generate electricity by using the water that should flow into the flush toilet body 2 respectively, and it is possible to secure a sufficient amount of power generation while reliably operating the drain valve hydraulic drive unit 14.

Further, according to the washing water tank device 4 of the present embodiment, the water flowing out from the water supply control valve 19 is guided to the generator 16 via the tank water supply pipe 25a configured by the flexible pipe, so that the washing water tank device 4 When the tank water supply pipe 25a is used, the tank water supply pipe 25a easily vibrates, and the air accumulated inside can be effectively discharged. As a result, it is possible to prevent a decrease in power generation efficiency in the generator 16.

Further, according to the washing water tank device 4 of the present embodiment, after the drain valve 12 is opened, the supply of water to the drain valve hydraulic drive unit 14 is stopped, so that the drain valve 12 is opened. After that, since the entire amount of water supplied to the washing water tank device 4 passes through the generator 16, it can be used for power generation, and it is sufficient while the drain valve is surely opened by the drain valve hydraulic drive unit 14. The amount of power generated can be secured.

Further, according to the washing water tank device 4 of the present embodiment, when the float switch 29 detects a predetermined water level, the drainage control device 18 is closed, so that the opening of the drainage valve 12 is detected more reliably. The drainage control device 18 can be closed at an appropriate time, and a sufficient amount of power generation can be secured while the drainage valve 12 is surely opened.

Although the embodiments of the present invention have been described above, various modifications can be made to the above-described embodiments. For example, in the above-described embodiment, the generator 16 is provided in the water channel on the downstream side of the water supply control valve 19, but the generator 16 is installed on the downstream side of the water supply pipe branch portion 33 and upstream of the water supply control valve 19. It can also be installed in the waterway on the side.

Further, in the above-described embodiment, the electric power generated by the generator 16 is stored in the capacitor built in the controller, but the present invention is configured so that the electric power is stored in the storage battery instead of the capacitor. You can also. Further, in the above-described embodiment, the clutch mechanism 22 is provided between the piston and the drain valve, but the clutch mechanism 22 can be omitted. Further, in the above-described embodiment, the piston 14b provided in the drain valve hydraulic drive unit 14 is driven in the vertical direction, but for example, the present invention is configured so that the piston 14b is driven in the horizontal direction. You can also. In this case, it is preferable to provide a mechanism that converts the direction in which the piston 14b moves into the movement in the direction in which the drain valve 12 is driven. Further, in the above-described embodiment, the gap 14d is provided between the through hole on the bottom surface of the cylinder 14a and the rod 15, but the through hole 14f and the rod 15 may be watertight. Further, the present invention can be configured so that the drain valve 12 is driven by a mechanism rotated by the water supply pressure instead of the piston 14b of the drain valve hydraulic drive unit 14.

Further, in the above-described embodiment, in the water supply control device 19, the main valve body 19b is opened and closed by the float side pilot valve 19c driven by the water supply valve float 34, but the main valve body 19b is directly opened and closed by the solenoid valve. The present invention can also be configured as described above. Further, in the above-described embodiment, the water supply control device 19 can be configured to be opened and closed by a solenoid valve that is opened and closed in response to a detection signal of the float switch 29 instead of the water supply valve float 34. Further, the present invention can be configured so that the water level in the water storage tank 10 is calculated based on the amount of power generated by the generator 16 (the number of rotations of the generator) without being detected by the float switch 29. Further, in addition to the generator 16 provided in the tank water supply pipe 25a, a further generator may be provided in the outflow pipe 24b. As a result, the amount of power generation can be increased without hindering the operation of the drain valve hydraulic drive unit 14.

1 Flush toilet device 2 Flush toilet body (flush toilet)
2a Bowl part 4 Washing water tank device 6 Remote control device 8 Human sensor 10 Water storage tank 10a Drain port 10b Overflow pipe 12 Drain valve 14 Drain valve Hydraulic drive unit 14a Cylinder 14b Piston 14c Spring 14d Gap 14e Packing 14f Through hole 15 Rod 15a Upper Rod 15b Lower rod 16 Generator 18 Drainage control device 18a Solenoid valve side pilot valve 18b Main valve body 19 Water supply control valve (water supply valve)
19a Water supply valve main body 19b Main valve body 19c Float side pilot valve 20 Solenoid valve 22 Clutch mechanism 24a Inflow pipe 24b Outflow pipe 25a Tank water supply pipe 25b Tank water supply pipe branch (second branch)
26 Drain valve float mechanism 26a Float part 26b Engagement part 28 Controller 29 Float switch (water level detector)
30 Vacuum breaker 31 Vacuum breaker 32 Water supply pipe 32a Water stop valve 32b Constant flow valve 33 Water supply pipe branch (branch)
33a 1st branch pipe 33b 2nd branch pipe 34 Water supply valve float 34a Arm

Claims (7)

It is a flush water tank device that supplies flush water to a flush toilet using the electric power generated by itself.
A water storage tank in which the washing water to be supplied to the flush toilet is stored and a drain port for discharging the stored washing water to the flush toilet is formed.
A drain valve that opens and closes the drain port to supply and stop flush water to the flush toilet,
The drain valve hydraulic drive unit that drives the drain valve using the supplied tap water pressure,
A drainage control device that supplies and stops water to the drain valve hydraulic drive unit so that the supplied tap water flows into the drain valve hydraulic drive unit.
A solenoid valve that controls the opening and closing of this drainage control device,
A water supply valve that supplies and stops water to the water storage tank so that the supplied tap water flows into the water storage tank.
A branching part that branches the supplied tap water, one of which flows into the drainage control device, and the other of which flows into the water supply valve.
It has a generator that generates electric power for operating the solenoid valve by a water stream.
The washing water tank device is characterized in that the generator is provided in a water channel on the downstream side of the branch portion and on the upstream side of the water supply valve, or in a water channel on the downstream side of the water supply valve. The washing water tank device according to claim 1, wherein the generator is provided in a water channel on the downstream side of the water supply valve. Further, the water channel on the downstream side of the water supply valve is provided with a second branch portion for branching the water flowing out from the water supply valve, one of which flows into the water storage tank and the other of which flows into the flush toilet. The washing water tank device according to claim 2, which is provided on the upstream side of the second branch portion. The washing water tank device according to claim 2 or 3, wherein the water flowing out from the water supply valve is guided to the generator via a flexible pipe. The drainage control device is any one of claims 2 to 4 for stopping the supply of water to the drainage valve hydraulic drive unit after the drainage valve is opened and before the water supply valve is closed. The wash water tank device described in the section. The washing water tank device according to claim 5, further comprising a water level detecting device for detecting the water level in the water storage tank, and when the water level detecting device detects a predetermined water level, the drainage control device is stopped. It is a flush toilet device
The washing water tank device according to any one of claims 1 to 6.
The flush toilet that is washed with the wash water supplied from this wash water tank device,
A flush toilet device characterized by having.

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