JP2758668B2 - Toilet flush water supply - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flush water supply device for a toilet having a water supply path to both a trap section and a bowl section of the toilet.

(Prior art) Japanese Patent Publication No. 55-30092 discloses a cleaning water supply system in which water is supplied to a trap drainage channel to discharge dirt and wastewater, and then water is supplied to a bowl portion to wash and seal the bowl portion. It is known at This device has a configuration in which two solenoid valves for a bowl portion and a trap are provided, and each solenoid valve is opened for a preset time.

(Problems to be Solved by the Invention) However, if an electromagnetic valve is provided for each water supply channel such as a bowl portion and a trap portion, the number of components constituting the device increases, and the configuration becomes complicated and the device becomes complicated. Becomes large.

Further, since the valve is opened only for a predetermined time, if the water supply pressure is different, the amount of washing water supplied to each part varies. If the water supply pressure is high, excess water is supplied, which is not preferable from the viewpoint of water saving. If the water supply pressure is low, discharge of waste and cleaning of the bowl portion become insufficient.

(Means for Solving the Problems) The present invention for solving the above problems is an apparatus for supplying wash water to a plurality of water inlets such as a bowl portion of a toilet bowl and a trap drainage channel in a predetermined order. An inflow port is connected to the flush water supply pipe, and a plurality of outflow ports are connected to respective water supply ports of the toilet, and the multiway switching valve has a water stopping function, and is upstream of the water supply port of the multidirectional switching valve. And a control device for switchingly driving the multi-directional switching valve in a predetermined order based on an output signal of the flow rate detecting means.

(Operation) A plurality of solenoid valves can be replaced by a single multi-directional switching valve, making the device compact and simple. Further, since the multi-directional switching valve is driven based on the output signal of the flow meter, the water supply pressure is increased. Regardless, the water supply amount can be controlled to be substantially constant.

(Example) Hereinafter, an example of the present invention is described based on an accompanying drawing.

FIG. 1 is a longitudinal sectional view of a toilet provided with a flush water supply device according to the present invention. In FIG. 1, reference numeral 1 denotes a siphon jet toilet, and the toilet 1 includes a bowl portion 3 partitioned by a partition 2 and a trap drainage channel 4. The trap drainage channel 4 connects an inflow port 5 formed in a lower portion of a rear wall of the bowl portion 3 and an outflow port 6 formed in a rear bottom surface of the toilet 1 in a substantially inverted U-shape. The trap drainage channel 4 has a substantially straight pipe-shaped drainage channel 4b downstream of the weir portion 4a, which is a bent portion, and has a throttle 4c at the lower end of the drainage channel 4b. The constricted portion 4c is obtained by reducing the inner diameter of the discharge passage 4b in a direction orthogonal to the pipe wall of the discharge passage 4b. The throttle 4c does not necessarily have to be provided at the position of the outlet 6 which is the lower end of the discharge path 4b.
It may be provided at a substantially middle portion of 4b or at a position downstream of the middle portion.

In the trap drainage channel 4, a large number of projections 4d are provided on the pipe wall downstream of the weir 4a. In the embodiment shown in FIG. 1, three projections 4d are formed by making the inner circumference of the tube wall make a full circumference at a predetermined interval. The projections 4d are arranged at predetermined intervals. However, as shown in FIG. 2, the phase of the position where the projections 4d...
4d, and the flow is changed so as to flow down uniformly over the entire circumference of the pipe wall of the discharge path 4b. As a result, the washing water is supplied to the throttle portion 4c substantially uniformly over the entire circumference, a stable water film state is generated even with a small flow rate, and the siphon action can be efficiently caused.

In the toilet 1 according to the present embodiment, a rim water passage 9 is formed in an annular shape on the rim portion 8 at the upper peripheral edge of the bowl portion 3 so as to protrude inward of the bowl portion 3, and the bottom surface of the rim water passage 9 is formed. Water outlets 10 are formed obliquely with respect to the bowl 3 at appropriate intervals. In addition, the rim water passage 9 has a rim water supply chamber 11 at the rear.
Contact

The jet nozzle 12 is attached to the jet nozzle mounting hole at the bottom of the bowl portion 3 in a watertight state via an adhesive or the like. The jet injection hole 12a of the jet nozzle 12 is connected to the inflow port 5 of the trap drain passage 4. It is directed substantially at the center of the upward inclined pipe line from the upper part to the weir portion 4a. The jet nozzle 12 is formed of metal, synthetic resin, or the like. In the present embodiment, the jet nozzle 12 has a hook shape.

A box 13 is provided at the upper rear of the toilet 1
A cleaning water supply device (hereinafter referred to as a water supply device) 14 is housed in the device 13.

The water supply device 14 includes a flow meter 19, a two-way switching valve 20 that is a multi-directional switching valve, a control device 15, and an operation unit 16 and a vacuum breaker 18, 21 that are an activation input unit to the control device 15. Become. A water supply pipe 23 provided with a flow meter 19 is connected to the inflow port of the two-way switching valve 20, and one of the outflow ports of the switching valve 20 is connected to the water supply port 11a of the rim water supply chamber 11 via the vacuum breaker 18. . The other outlet of the switching valve 20 is connected to a jet water supply port 12b of the jet nozzle 12 via a vacuum breaker 18 and a jet water pipe 24 made of metal, synthetic resin, synthetic rubber, or the like.

FIG. 3 is a sectional view showing the structure of the two-way switching valve 20.
This switching valve 20 bifurcates the inflow pipe 100 connected to the water supply pipe 24, and connects the valve body 103 between the first outflow pipe 101 and the second outflow pipe 102, respectively. This valve body 10
3 is provided with one micro-distance stepless drive type actuator 104 for actuation.

Each valve element 103 is disposed symmetrically with respect to the actuator 104, and has a substantially cylindrical partition wall 105 protruding into the first and second outflow conduits 101, 102, and is mainly provided at a leading edge of the partition wall 105. A valve seat 106 is formed, and an inner surface 108 of the inflow-side conduit 107 is formed.
The outer periphery of a diaphragm 109 made of a flexible material is attached in a watertight state, and the central portion of the diaphragm 109 is brought into contact with the main valve seat 106, so that the inflow-side conduit 107 and the first and second outflow conduits 101, 102 Communication is blocked.

Further, a small-diameter orifice 110 is formed in a peripheral portion of the diaphragm 109 facing the inflow-side conduit 107 so that the inflow-side conduit 107 is formed.
And the pressure chamber 111 are communicated. Further, a pilot valve seat 112 and a pilot passage 113 are provided at the center of the diaphragm 109.
To communicate the pressure chamber 111 and the outflow conduits 101, 102,
The communication between the pressure chamber 111 and the outflow conduits 101 and 102 is opened and closed by bringing the distal end surface of the pilot valve element 114 interlocked with the actuator 104 into contact with the pilot valve seat 113.

The pilot valve body 114 has a pilot valve seat 1 at the end.
An elastic body for contact with 12 is provided continuously.

In particular, the orifice 110 has a smaller diameter than the pilot valve seat 113 and the pilot passage 114,
When 14 is closed, the pressure in the pressure chamber 111 increases,
By pressing the diaphragm 109 in the direction of the main valve seat 106, the valve body 103 is pressed.
When the pilot passage 114 is open, the pressure in the pressure chamber 111 is reduced, and the diaphragm 109 is separated from the main valve seat 106 to open the valve body 103 by the pressure in the inflow-side conduit 107. . In the drawing, reference numeral 115 denotes a packing having a small sliding resistance.

The micro-distance stepless drive actuator 104 includes a plunger 117 movable concentrically and axially within a cylindrical casing 116, and a piezoelectric element assembly concentrically disposed on the outer peripheral surface of the plunger 117. Consists of 118 and

The piezoelectric element assembly 118 includes four piezoelectric elements a, b, c, and d. The central piezoelectric elements b and c are fixed to a holding portion 119 formed at the center of the inner wall of the casing. These piezoelectric elements b and c
The base ends of the cantilever-like elastic bridges e and f are fixed to the axial end surfaces of the piezoelectric elements a and d, and the piezoelectric elements a and d are fixed to the outer peripheral surfaces of the elastic bridges e and f at the distal ends. The brake shoes g and h are fixed to the inner peripheral surface.

And, among these piezoelectric elements a, b, c, d, the piezoelectric elements a, d are:
In the energized state, the piezoelectric element itself shrinks, the inner diameter thereof is reduced, and the plunger 117 is clamped.
Cancel 7. On the other hand, the piezoelectric elements b and c are in a contracted state in the axial direction of the plunger 117 in the non-energized state, and are expanded in the energized state to increase the total length in the axial direction.

Thus, by controlling the four piezoelectric elements a, b, c, and d by the control device 15, the plunger 117 can move in the axial direction.

The piezoelectric elements a, b, c, and d are cylindrical elements formed by laminating a large number of piezoelectric element pieces in the axial direction of the plunger 117 as shown in the drawing, and electrodes are provided at both ends of the cylinder. It operates by applying a voltage to.

For the piezoelectric element piece, for example, piezoelectric ceramics can be used.
A ferroelectric material having an O ₃ perovskite crystal structure, such as PZT [Pd (Zr, Ti) O ₃ ], PLZT (Pb (Zr, Ti) O ₃ ),
A PT (PbTiO ₃ ) type or a three-component type based on PZT can be used.

The plunger 117 is formed in a substantially cylindrical shape, and accommodates a proximal-end enlarged portion 114a of the pilot valve element 114 at each of its inner ends, and a coil spring having an urging force in the extension direction between the proximal-end enlarged portions 114a. 120 with each pilot valve element 1
When the piezoelectric element assembly 118 is not energized by urging the pilot valve seat 14 toward the pilot valve seat 112, both the pilot valve seats 112 are closed.

In addition, locking inner flanges 121 are provided on the inner peripheral surfaces of both ends of the plunger 117, so that the proximal end enlarged diameter portion of each pilot valve element 114
A valve stem with a smaller diameter than 114a is inserted,
When the plunger 117 is operated in one of the left and right directions, the pilot valve seat 112 in this operation direction remains closed, and the pilot valve seat 112 on the side opposite to the operation direction is expanded with the locking inner flange 121 and the base end. By contact with the diameter portion 114a, the pilot valve element 114 is separated from the pilot valve seat 112, and the valve element 103 can be opened.

 FIG. 4 is a block diagram of the control device.

The control device 15 includes an input interface circuit 15a, a microprocessor (MPU) 15b, a memory 15c, a timer 15d, and an output interface circuit 15e. The operation unit 16 is connected to the input interface 15a, and the output interface circuit 15e , Two-way switching valve 20 via water supply control line 20a
Is connected.

The operation unit 16 includes a switch for starting the flushing of the toilet 1, and opening and closing of this switch is performed by a start signal line 16a.
Is input to the control device 15.

The operation unit 16 may be provided with a plurality of operation buttons so that the supply amount of the cleaning water can be selected. Further, a switch or a sensor for detecting the seating is provided, and these signals are input to the control device 15 to enable the operation of the operation unit 16 only in the seating state, or after the seating state is changed to the unseated state. Alternatively, the cleaning may be automatically started after a predetermined time.

As the flow meter 19, an impeller type flow meter is used. The flow meter 19 has a magnet mounted on the impeller, electromagnetically detects the rotation of the impeller, and outputs an alternating voltage having a frequency proportional to the rotation of the impeller as a flow signal.

The flow meter 19 may be an electromagnetic flow meter other than the impeller flow meter.

The flow rate signal input to the input interface circuit 15a by the flow rate signal line 19a is converted into a waveform in the input interface circuit 15a, and is converted into a pulse signal having a predetermined amplitude and a predetermined pulse width proportional to the frequency of the flow rate signal, It is input to the microprocessor 15b.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. 5 and the time chart of FIG.

In the flowchart of FIG. 5, S1 to S9 indicate each step of the flowchart.

For convenience of description, the first valve mechanism of the two-way switching valve 15 is referred to as a rim valve, and the second valve mechanism is referred to as a jet valve.

In response to the start signal from the operation unit 16, the control device 15 opens the rim valve (S1) and supplies the bowl unit 3 of the toilet 1 with washing water. The supplied cleaning water generates a vortex in the bowl portion 3 and performs pre-cleaning of the bowl portion 3. The microprocessor 15b counts the pulse signal whose waveform is shaped based on the flow signal of the rim flow meter 19 to obtain an integrated flow value or an instantaneous flow rate, and obtains the bowl part pre-cleaning water amount previously set in the memory 15c. At the time when the value matches the set value, the control device 15
Via the output interface circuit 15e, the two-way switching valve 20
The actuator 104 is driven to close the rim valve (S2, S3).

Next, the control device 15 drives the two-way switching valve 20 to open the jet valve in the same manner as described above (S4). As a result, the washing water is discharged from the jet nozzle 12 to the trap drainage channel 4.
The washing water is jetted into the drainage channel 4b, and the jetted washing water fills the drainage channel 4b and exhausts air from the outlet 6 to the drainage pipe (not shown) connected to the outlet while injecting the air in the drainage channel 4b. Therefore, a negative pressure is generated in the discharge path 4b and gradually increases. Due to this negative pressure, the pool water 25 of the bowl 3 is drawn into the discharge channel 4b side beyond the weir portion 4a of the trap drain channel 4, and the negative pressure further increases. Occurs.

The water amount of the washing water jetted from the jet nozzle is integrated based on the flow signal of the flow meter 19 or obtained as an instantaneous flow rate in the same manner as in the bowl section described above, and the jet water supply amount set in the memory 15c in advance. The control circuit 15 drives the jet valve to the closed state at the point of time when the value matches the set value (S5, S6).

Then, the control device 15 starts the timer 15d immediately after driving the jet valve to the closed state in step S4, and after a predetermined time elapses, drives the rim valve to the open state again (S7, S8). When the set amount of water is supplied, the rim valve is driven to the closed state (S9, S10).

Thus, a series of water supply control shown in the time chart of FIG. 6 is completed. It should be noted that different amounts of water are set for the stool and the urine, respectively, based on the power signal of the operation unit 16.

As described above, the present embodiment has been described by taking a jet nozzle as an example of a trap drainage channel. However, the present invention is not limited to such a jet nozzle. For example, a shower 7 is provided instead of a jet nozzle as shown in FIG. Alternatively, the water supply to the shower 7 may be controlled. The shower 7 is provided in the trap drainage channel on the downstream side by the weir portion of the trap drainage channel 4, and the inside of the trap drainage channel is set to a negative pressure by spraying water from the shower. The washing water is drawn into the trap drainage channel to easily cause a siphon action to enhance the washing effect.

Further, although a minute distance stepless drive type actuator is used as the driving device, an electromagnetic solenoid, a stepping motor or the like may be used.

The multidirectional switching valve has been described as an example of a two-way switching valve. However, for example, a three-way switching valve for rim water supply, jet water supply, and shower water supply may be used by combining a jet nozzle and the shower.

(Effect of the Invention) As described above, the cleaning water supply device according to the present invention
Since the water supply to each water supply channel is switched by one multi-directional switching valve, there is no need to provide an on-off valve such as a solenoid valve for each water supply channel as in the related art, and the device can be reduced in size and simplified. This also makes it possible to mount the device in a toilet. In addition, since the drive control of the multi-directional switching valve is performed based on the output signal of the flow meter, substantially constant water supply can be performed regardless of the pressure in the water supply pipe, and the toilet can be reliably washed. it can.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a toilet provided with a flush water supply device according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view showing a two-way switching valve, FIG. Fig. 5 is a block diagram of the water supply device, Fig. 5 is the same flowchart, Fig. 6 is a time chart showing the operation of the water supply device of Fig. 4, and Fig. 7 is a toilet showing another embodiment of the present invention. FIG. In the drawings, 1 is a toilet bowl, 3 is a bowl portion, 4 is a trap drainage channel, 9 is a rim water channel, 11a is a rim water inlet, 12 is a jet nozzle, 12b is a jet water inlet, and 14 is a flush water supply device. (Water supply device), 15 is a control device as water supply control means, 16
Denotes an operation unit, 19 denotes a flow meter, and 20 denotes a multi-way switching valve (two-way switching valve).

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shinji Shibata 2-8-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Inside the Toga Kikai Co., Ltd. Chigasaki Plant (72) Inventor Noboru Niihara 2--8, Honmura, Chigasaki-shi, Kanagawa Prefecture No. 1 Tochiki Kikai Co., Ltd. Chigasaki Plant (56) References JP-A-3-90732 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E03D 5/10 E03D 3/00 E03D 11/02

Claims (1)

(57) [Claims] An apparatus for supplying flush water to a plurality of water supply ports such as a bowl portion of a toilet bowl and a trap drainage channel in a predetermined order, wherein the inflow port is connected to a flush water supply pipe,
A multi-directional switching valve having a water stopping function, the plurality of outlets being connected to respective water supply ports of the toilet, and a flow rate detecting means provided upstream of the water supply port of the multi-directional switching valve. A control device for switching and driving the multi-directional switching valve in a predetermined order based on an output signal of the flow rate detecting means.