JP2761256B2 - Cleaning water supply device - Google Patents

Description

The present invention relates to an apparatus for supplying flush water to a toilet.

(Conventional technology) After washing water is supplied to the trap drainage channel to generate a siphon action in the trap drainage channel to discharge dirt and wastewater from the bowl portion, water is supplied to the bowl portion to wash and seal the bowl portion. A cleaning water supply apparatus adapted to perform the cleaning is known from Japanese Patent Publication No. 55-30092. This device includes two solenoid valves for a bowl portion and a trap, and is configured to open each solenoid valve for a preset time.

(Problems to be Solved by the Invention) As described above, the conventional flush water supply device has a configuration in which the solenoid valve is opened only for a preset time, so that if the water supply pressure of the water supply pipe is different, the water is supplied to each part of the toilet. Flushing water volume 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, the amount of water supplied is insufficient, and discharge of waste and cleaning of the bowl portion may be insufficient. On the other hand, in order to measure the flow rate flowing through each water supply channel, a pressure gauge is provided in each water channel, and the flow rate is calculated from the pressure value, which is not preferable in terms of cost.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a flush water supply device capable of supplying a predetermined amount of water regardless of a water supply pressure.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides an apparatus for supplying wash water to a plurality of water supply ports in a predetermined order through a plurality of water supply paths of a toilet, and the opening and closing of each water supply path. A valve mechanism is provided, and a passage is provided between the water supply passages used at different times so as to communicate the water supply passages, and when there is a water flow in the water supply passage at a connection portion between the passage and the water supply passages. It is characterized in that a valve element for introducing the supply pressure of the water flow into the passage is provided, and a pressure sensor is provided in the passage.

(Operation) When there is a water flow in any of the water supply passages, a valve element provided at a connection portion between the water supply passage and the passage guides pressure into the passage, so that the supply water pressure is measured by a pressure sensor provided in the passage. be able to. Therefore, when water is supplied to each water supply channel in different time zones, the water supply pressure of each water supply channel can be measured by one pressure sensor, and the flow rate can be known.

(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 according to the present invention. Toilet bowl 1
Has a bowl part 3 and a trap drainage channel 4 partitioned by a partition wall 2. 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. A drain 4b downstream of the weir 4a of the trap drain 4 is formed in a substantially straight pipe shape, and a water seal generation mechanism 7 separate from the toilet is connected from a substantially middle portion of the drain 4b to the downstream. Has formed.

A rim water passage 9 is provided on the rim 8 at the upper edge of the bowl 3.
Are formed in an annular shape so as to protrude inward of the bowl portion 3, and rim water outlets 10 are formed obliquely with respect to the bowl portion 3 at appropriate intervals on the bottom surface of the rim water passage 9. Further, the rim water passage is connected at the rear to the rim water supply chamber 11 and further to the rim water supply passage 9a.

A jet nozzle 12 is attached to the bottom of the bowl portion 3, and the jet nozzle 12 faces the inflow port 5 of the trap drainage channel 4.

A box 13 is provided in the upper rear part of the toilet 1, and a water supply control system 14 is housed in the box 13. The water supply control system 14 includes a two-way automatic switching valve 20 for independently supplying water to the bowl portion 3 via the rim water supply passage 9a and the rim water communication chamber 11 and water supply to the jet supply passage 12c. As shown in the figure, a pressure measuring device 30 according to the present invention provided between these water supply passages 9a and 12c, a control device 15, an operation unit 16 for supplying a cleaning start input to the control device 15, and a water supply pipe 17 Pressure sensor 18 that detects the water supply pressure of the rim, and a vacuum breaker for rim and jet
19,21.

A water supply pipe 17 is connected to the inlet of the two-way automatic switching valve 20,
One outlet of the switching valve 20 is connected to a water supply port 11a of the rim water supply chamber 11 via a vacuum breaker 19 provided in the rim water supply passage 9a. 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 21 and a jet supply path 12c made of metal, synthetic resin, synthetic rubber, or the like.

FIG. 2 is a diagram showing a pressure measuring device according to the present invention,
FIG. 2 is a cross-sectional view showing a structure of a two-way switching valve 20 and a pressure measuring device 30. FIG. 3 is a view of the valve element taken along line III-III of FIG.

FIG. 4 is a cross-sectional view showing the structure of the two-way switching valve. The switching valve 20 bifurcates the inflow pipe 100 connected to the water supply pipe 17, and is connected to the first outflow pipe 9a. Second outflow line 12
a minute distance stepless drive actuator for interposing a valve body 103 between the actuator and the valve body c.
It has 104.

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 pipes 9a and 12c. The main valve seat 106 is formed at the same time, and the outer periphery of a diaphragm 109 made of a flexible material is attached to the inner surface 108 of the inflow-side conduit 107 in a watertight state, and the central portion of the diaphragm 109 is brought into contact with the main valve seat 106. The communication between the inflow side pipe 107 and the first and second outflow pipes 9a and 12c is interrupted.

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 13 are provided in the center of the diaphragm 109 to communicate the pressure chamber 111 with the outflow pipes 9a and 12c, and the pilot valve body 114 is connected to the pilot valve seat 113 in conjunction with the actuator 104. The pressure chamber 1
The opening and closing of the communication between 11 and the outflow pipes 9a and 12c is configured.

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, when the orifice 110 is smaller in diameter than the pilot passage 113, and when the pilot passage 113 is closed by the pilot valve element 114, the pressure in the pressure chamber 111 increases, and the diaphragm 109 is pressed toward the main valve seat 106. , Valve body
When the pilot valve element 114 is separated from the pilot passage 113 and the pilot passage 113 is open, the pressure of the pressure chamber 111 is reduced from the pilot passage 113 to the rim water supply passage 9a and the jet water supply passage 12c. And the pressure in the pressure chamber 111 decreases, and the
Is configured to open the valve body 103 away from the main valve seat 106. 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 expands, so that the inner diameter is reduced to clamp the plunger 117, and in the non-energized state, the piezoelectric element returns to the original state and the inner diameter is enlarged from the energized state to expand the plunger 117. To release. On the other hand, the piezoelectric elements b and c extend in the energized state from the non-energized state, thereby increasing the overall length of the plunger 117 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 ] or 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 on the opposite side to the operation direction remains closed with the pilot valve seat 112 in the operation direction, and the inner flange 121 for locking and the base end expansion. 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.

In this way, the flowing water in the water supply pipe 100 flows through either the rim water supply passage 9a or the jet water supply passage 12c by the two-way automatic switching valve 20, as shown in FIG. Water supply channel 9a for these rims
A passage 31 is provided between the jet water supply passage 12c and
One pressure sensor 18 is provided at the center. aisle
Valve bodies 33 and 34 are provided in the vicinity of the connection portions of the 31 with the respective water supply passages 9a and 12c. These valve bodies 33, 34 are provided with ring-shaped contact projections 35, 36 on the inner periphery of the passage 31, and disc-shaped water blocking plates 37, 38 on end faces 35a, 36a of the contact projections on the pressure sensor side. It is configured to repress. The springs 39, 40 are provided with the contact protrusions 35,
The ring-shaped projections 41, 42 provided on the water supply passages 9a, 12c side with respect to 36 extend and are attached between inner peripheral ends 41a, 42a of the water blocking plates 37, 38 and outer end surfaces 37a, 38a. 37,3
8 has paddles 43a, 43a projecting to the water supply passages 9a, 12c at the center of the outer end surface thereof and receiving the dynamic pressure of the water flowing through the water supply passages 9a, 12c at the tip thereof, and opening the valve bodies 33, 34 at the time of water supply. Paddle rods 43 and 44 are provided. Further, packings 45, 46 are provided on the outer peripheral surfaces of the outer end surfaces of the water blocking plates 37, 38 which come into contact with the contact projections 35, 36.

According to such a configuration, only the valve element on the water supply channel side where water is supplied can be opened and the water supply pressure can be introduced into the passage 31, and the water supply pressure in both the water supply passages 9a and 12c is measured by one pressure sensor 18. be able to.

FIG. 5 shows another embodiment of the present invention. In the valve bodies 48 and 49 according to this embodiment, water stop plates 50 and 51 are attached to one end of a connection portion of passages 9a and 12c so as to be swingable. This is always urged by the springs 56 and 57, and is brought into contact with the inner peripheral surfaces 52a and 53a of the ring-shaped contact protrusions 52 and 53 provided at the boundaries of the connection portions via the packings 54 and 55. Things. With such a configuration, the same operation as that of the valve body of FIG. 2 is achieved, and the pressure of each water supply passage can be measured by one pressure sensor 18.

Next, the configuration of the water supply control system will be described with reference to the block diagram of FIG.

The control device 15 includes an input interface circuit 15a, a microprocessor unit (MPU) 15b, a memory 15c, a timer 1
5d, an output interface circuit 15e, the input interface 15a is connected to the operation unit 16 and the pressure sensor 18, and the output interface circuit 15e is connected to the two-way switching valve 20.

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 pressure sensor 18, for example, a semiconductor or piezoelectric ceramic type pressure sensor is used. The output signal of the pressure sensor 18 is supplied to the AD interface 15a through the pressure signal line 18a.
It is input to a converter and converted into a digital signal corresponding to the feedwater pressure.

A two-way switching valve 20 is connected to the output interface circuit 15e via a water supply control line 14a.

FIG. 7 shows the water supply timing of the rim water supply channel and the jet water supply channel. Since the use timing of the two water supply channels 9a and 12c is different in the toilet according to the present embodiment, the water supply pressure in each water supply channel can be measured by one pressure sensor,
As a result, the flow rate can be calculated.

That is, in response to a start signal from the operation unit 16, the rim water supply passage
When using the 9a or jet water supply channel 12c, the control device 15
When the water pressure is detected by the pressure sensor 18, the flow rate Q becomes the pressure P
And Q = can be determined by the Cv√ _P relationship flow control can be performed.

The washing operation is to supply a constant flow rate to the rim first through the rim water supply channel, and then immediately perform a constant amount of jet water supply in the jet water supply channel to efficiently perform the siphon action. Rim water is supplied to seal water.

Next, the operation of this embodiment will be described with reference to the time chart of FIG. 7 and the flowchart of FIG. In addition,
In FIG. 8, S1 to S13 indicate each step of the flowchart. For convenience of description, the first valve mechanism of the two-way switching valve 20 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. At this time, the microprocessor unit 15b calculates the water supply pressure based on the output signal of the pressure sensor 18, and determines a water supply time corresponding to the calculated value by a table search (S2). The water supply time is counted by the timer 15d, and after the lapse of the time, the actuator 104 of the two-way switching valve 20 is driven via the output interface circuit 15e to close the rim valve (S3, S3).
Four).

Next, the control device 15 drives the two-way switching valve 20 in the same manner as described above to open the jet valve (S5). As a result, the washing water is jetted from the jet nozzle 12 to the discharge channel 4b of the trap drain channel 4, and the jetted cleaning water fills the discharge channel 4b. Since the air is exhausted to a drain pipe (not shown) connected to the outlet, a negative pressure is generated in the discharge path 4b and gradually increases. Due to this negative pressure, the accumulated water in the bowl 3
25 is drawn into the discharge passage 4b side beyond the weir portion 4b of the trap drainage passage 4, and the negative pressure further increases, so that a siphon action is generated in a short time from the start of ejection.

The water supply time of the washing water ejected from the jet nozzle 12 is determined based on the output signal of the pressure sensor 18 in the same manner as in the above-described bowl section, and is controlled after the jet water supply time set in the memory 15c in advance. The circuit 15 drives the jet valve to a closed state (S6 to S8).

After driving the rim valve to the closed state in step S8, the control device 15 immediately starts the timer 15d, and after a predetermined time elapses, drives the jet valve to the open state again (S9, S10), When a preset amount of water is supplied based on the output signal of the sensor 18, the rim valve is driven to a closed state (S11, S12).

Thereby, a series of water supply control shown in the time chart of FIG. 7 is completed.

As described above, the present embodiment has been described using the jet nozzle as an example of water supply to the trap drainage channel. However, the present invention is not limited to such a jet nozzle, and for example, a shower may be used instead of a jet nozzle as shown in FIG. 60 may be provided to control the supply of water to the shower 60. The shower 60 is provided in the trap drainage channel on the downstream side by the weir portion of the trap drainage channel 4, and water is sprinkled from the shower to make the trap drainage channel a negative pressure. The washing water is drawn into the trap drainage channel to easily cause a siphon action to enhance the washing effect.

Although the valve mechanism has been described by taking a two-way switching valve having a water stopping function as an example, a separate and independent opening / closing valve may be provided in each water supply passage. Also, the water supply channel has been described by taking two water supply channels as an example.For example, as shown in FIG. 10, a jet nozzle and the shower are combined, and the rim water supply channel 61,
The present invention can also be applied to three water supply paths, ie, a jet water supply path 62 and a shower water supply path 63. In FIG. 10, reference numerals 64, 65, and 66 denote valve bodies of the present invention, 67 denotes a passage provided in each water supply passage,
Is a pressure sensor, and 69, 70, and 71 are on-off valves for each water supply passage.

(Effect of the Invention) As described above, the cleaning water supply device according to the present invention
A passage is provided between the two water supply passages used at different times so as to communicate these water supply passages, and the water supply pressure of the water flow is set only when there is a water flow in the water supply passage at a connection between the passage and each water supply passage. Since the valve element to be introduced into the passage is provided and the pressure sensor is provided in this passage, the feed water pressure flowing through the two water supply passages can be measured by one pressure sensor, and cost reduction can be achieved. The toilet can be reliably washed.

[Brief description of the drawings]

1 is a longitudinal sectional view of a toilet according to an embodiment of the present invention, FIG. 2 is a view showing a pressure measuring device according to the present invention, FIG. 3 is a view taken along the line III-III of FIG. FIG. 5 is a sectional view showing the structure of a two-way switching valve, FIG. 5 is a diagram showing another embodiment of the present invention, FIG. 6 is a block diagram showing a control device, FIG. 7 is a time chart showing water supply timing, FIG. 8 is a flowchart,
FIG. 9 is a vertical sectional view of a toilet bowl according to another embodiment of the present invention, FIG.
The figure shows the water supply channel. In the drawings, 9a and 61 are rim water supply paths, 12c and 62 are jet water supply paths, 63 is a shower water supply path, 18 and 68 are pressure sensors, 20 is a two-way switching valve (open / close valve), and 30 is the pressure of the two water supply paths. A measuring device, 31 is a passage, 33, 34, 48, 49 are valve bodies, and 69, 70, 71 are on-off valves.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinji Shibata 2-8-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kiki Co., Ltd. No. 1 Totoki Kikai Co., Ltd. Chigasaki Factory (56) Reference Jiko 7-30788 (JP, Y2) (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 in a predetermined order through a plurality of water supply paths of a toilet, wherein each water supply path is provided with a valve mechanism for opening and closing and used at different times. A passage is provided between each water supply passage so as to communicate these water supply passages, and a valve body that introduces the water supply pressure of the water flow into the passage is provided at a connection portion between the passage and each water supply passage only when there is a water flow in the water supply passage. And a pressure sensor provided in the passage.