JP2761259B2 - 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.

(Conventional technology) Japanese Patent Publication No. 55-30092 discloses a cleaning water supply device 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 washing / water supply device is provided with two solenoid valves for a bowl portion and a trap, and each of the solenoid valves is opened for a preset time.

(Problems to be solved by the invention) Therefore, if the water supply pressure of the water pipe for washing water supply is different,
The amount of cleaning water supplied to each part fluctuates.If the water supply pressure is high, more water than is required for cleaning is supplied, which is not preferable in terms of water saving.On the other hand, if the water supply pressure is low, waste discharge and washing of the bowl part are insufficient. It may be. If such a shortage of washing water occurs particularly in water supply that generates a siphon action, the siphon action cannot be generated, so that waste cannot be flown, and the toilet cannot be used thereafter.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention supplies a plurality of water supply ports provided in a toilet bowl with cleaning water in a predetermined order, and generates a siphon action by any of the water supplies to perform cleaning. In a device configured to perform the siphon action, a means for detecting a flow rate of the washing water flowing through the water supply path is provided in a water supply path for supplying water to generate the siphon action, and the siphon action is performed based on the flow rate detection signal. It is characterized in that a control device for controlling the amount of water to be generated is provided. As a means for detecting the flow rate, for example, a pressure sensor or a flow rate sensor is used.

(Operation) The means for detecting the flow rate outputs, for example, a water supply pressure or an instantaneous flow rate value, and the control device supplies water to the water supply passage for a predetermined time based on these values. Thereby, even if the water supply pressure fluctuates for a long time, it is possible to always supply a substantially constant washing water sufficient to generate the siphon action.

(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 control device 15 as water supply control means, and push button switches 16a and 16b for large cleaning and small cleaning, and provides a cleaning start input to the control device 15 at the same time as a selection input of a cleaning water amount. An operation unit 16 as a washing water amount selection input means, a pressure sensor 19 for measuring a water supply pressure of piping, a water supply valve mechanism 17 for controlling a water supply amount of washing water, a trap unit and a bowl provided downstream of the pressure sensor It comprises a two-way switching valve 20 for switching to water supply to the section, and atmosphere release valves 18 and 21.

One end of the water supply valve mechanism 17 is connected to a water supply pipe 23, and the other end is connected to a two-way switching valve via a pressure sensor 19 which is pressure detection means.
Connect to 20.

A water supply pipe 20a is connected to the inflow port of the two-way switching valve 20, and one of the outflow ports of the switching valve 20 supplies water to the rim water supply chamber 11 through an atmosphere opening valve 18 provided in the rim water supply passage 9a. Connect to mouth 11a. The other outlet of the switching valve 20 is connected to a jet water supply port 12b of the jet nozzle 12 through an air release valve 21 and a jet water pipe 24 made of metal, synthetic resin, synthetic rubber, or the like. The jet water pipe 24 directly connects the water supply device 14 and the jet nozzle 12, and is arranged along the rear lower surface of the bowl portion 3 so that the length of the jet water pipe 24 is shortened. The other end of the water pipe 24 is connected to the jet water supply port 12b of the jet nozzle 12. The two-way switching valve 20 is normally open on the rim water passage 11 side, and opens the jet water pipe only when it is driven.

 FIG. 3 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. An operation unit 16 and a pressure sensor 19 are connected to the input interface circuit 15a. The water supply control line 20a is connected to the interface circuit 15e.
The two-way switching valve 20 and the water supply valve mechanism 17 are connected via the.

The operation unit 16 is a stool 16 for starting the cleaning of the toilet 1.
a, a switch for urinal 16b is provided, and the opening and closing of this switch is input to the control device 15 via a start signal line 16a.

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.

The pressure sensor 19 uses a semiconductor pressure sensor. The pressure sensor 19 detects pressure as a resistance value and outputs, for example, a voltage signal corresponding to the resistance value. The pressure signal input to the input interface circuit 15a by the pressure signal line 19a is
The waveform is converted in the input interface circuit 15a, converted into a pulse signal having a predetermined amplitude and a predetermined pulse width proportional to the frequency of the pressure signal, and input to the microprocessor 15b.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. 4 and the time chart of FIG.

In the flowchart of FIG. 4, S1 to S8 indicate each step of the flowchart.

In response to the start signal from the operation unit 16, the control device 15 opens the valve mechanism for a predetermined time (S1, S2), and supplies the bowl 3 of the toilet 1 with flush water. The supplied cleaning water generates a swirl in the bowl portion 3 to perform pre-cleaning of the bowl portion 3. This water supply time is set in the memory 15c in advance, and is counted by the timer 15d. After the lapse of the time, the post-control device 15 drives the two-way switching valve 20 via the output interface circuit 15e to switch the water supply from the rim to the jet nozzle (S2, S3).

As a result, the washing water is jetted from the jet nozzle 12 into the trap drainage channel 4, and the jetted washing water fills the drainage channel 4, while the air in the drainage channel 4 is swirled through the outlet 6. Since the air is exhausted to a drain pipe (not shown) connected to the outlet, a negative pressure is generated in the drain passage 4 and gradually increases. Due to this negative pressure, the pool water 25 of the bowl portion 3 flows over the weir portion 4a of the trap drainage channel 4 and flows out of the outlet 6
The siphon action is generated in a short time from the jet fountain because the negative pressure further increases.

The water supply time of the washing water ejected from the jet nozzle 12 is obtained by searching a table of the pressure value obtained by the pressure sensor 19 and the water supply time (S4). After the water supply time has elapsed, the control circuit 15 operates the two-way switching valve. Switch to rim side (S5, S
6). In this way, the water supply amount for generating the siphon effect is determined based on the output signal of the pressure sensor, so that a constant amount of water can always be supplied regardless of the fluctuation of the water supply pressure, and the generation of the siphon can be reliably performed. Can be. Then, after opening the rim side in step S7, the control device 15 supplies water necessary for sealing for a predetermined time (S7),
Thereafter, the water supply valve mechanism 17 is driven to the closed state (S8).

In step S7, the predetermined time may be selected based on the pressure value.

Thereby, a series of water supply control shown in the time chart of FIG. 5 is completed.

In the above embodiment, an example in which a pressure sensor is provided as a means for detecting a flow rate is shown. However, the present invention is not limited to a pressure sensor as a means for detecting such a flow rate. As for the path, an example in which water supply control to the jet nozzle is described as an example of water supply to the trap drainage path, but the present invention is not limited to such a jet nozzle, and for example, as shown in FIG. A flow sensor 22 is provided instead of the pressure sensor 19,
Further, a shower 7 may be provided in place of the jet nozzle, and a water supply structure for controlling water supply to the shower 7 may be adopted. 6th
In the figure, an impeller flow meter is used as the flow sensor 22, for example.
This flowmeter has a magnet attached to the impeller, magnetically 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.

FIG. 7 is a flowchart showing the operation of the control device when the pressure sensor is replaced with a flow sensor in the operation of FIG. 4. In step 4, the operation for determining each subsequent water supply time based on the instantaneous value of the flow sensor is performed. Others are the same as those shown in FIG.

In this embodiment, the on-off valve and the direction switching valve are used. However, two on-off valves may be arranged. Further, the opening may be adjusted by using a flow control valve instead of the on-off valve.

(Effect of the Invention) As described above, the cleaning water supply device according to the present invention
At least for flow control for siphon generation, the valve opening time is determined based on the detected value of flow rate such as feed water pressure and instantaneous flow rate, so a constant amount of flush water is always supplied even if pipe pressure fluctuations occur The toilet can reliably perform the siphon action, and the toilet can be reliably cleaned.

[Brief description of the drawings]

FIG. 1 is a vertical 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 block diagram of the water supply device, and FIG. FIG. 5 is a time chart showing the operation of the water supply device of FIG. 3,
FIG. 6 is a vertical sectional view of a toilet showing a toilet according to another embodiment of the present invention, and FIG. 7 is a flowchart showing the operation of a control device according to another embodiment. 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
Is an operation unit, 17 is a water supply valve mechanism, 19 is a pressure sensor (means for detecting a flow rate), 20 is a two-way switching valve, and 22 is a flow rate sensor (means for detecting a flow rate).

Continuation of the front page (72) Inventor Shinji Shibata 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kikai Co., Ltd. Chigasaki Plant (72) Inventor Noboru Niihara 2-2-1, Honmura, Chigasaki-shi, Kanagawa Prefecture East In the Chigasaki factory of Toueki Co., Ltd. (58) Fields investigated (Int. Cl. ⁶ , DB name) E03D 5/10 E03D 3/00 E03D 11/02

Claims (3)

(57) [Claims] 1. An apparatus in which washing water is supplied to a plurality of water supply ports provided in a toilet in a predetermined order, and a siphon action is generated by any of the water supplies to perform washing, wherein the siphon action is generated. A means for detecting a flow rate of washing water flowing through the water supply path is provided in a water supply path for supplying water, and a control device for controlling a water supply amount for generating a siphon action based on the flow rate detection signal is provided. A flush water supply device for a toilet bowl, characterized by the fact that the toilet is flushed. 2. A flush water supply system for a toilet according to claim 1, wherein said means for detecting said flow rate comprises a pressure sensor. 3. The flushing / water supply device for a toilet according to claim 1, wherein said means for detecting the flow rate comprises a flow rate sensor.