JPH0390751A - Flush water feeder of toilet - Google Patents

Abstract

PURPOSE:To practise a simple and secure cleaning by providing a water feed controller in the passage supplying water to a trap and a bowl and by supplying a specified volume of washing water with a specified timing. CONSTITUTION:A toilet is provided with a bowl 3 having water injection holes 10 on a rim, a trap drainage way 4 having a reversed U-form, a nozzle 12 for jet directing to the flowing opening 5 thereof. Next, a flow rate regulating valve 17 and a two-way change-over valve 20 are connected to each other via a flow rate meter 19. Next, one of the discharging outlets of the valve 20 is connected to a rim feed water chamber 11 and the other end thereof is connected to a nozzle 12. The valve 20 is changed over according to the feed water volume and time previously defined in the controller 15 by use of an operational board 16 to practise precleaning of the bowl, jet injection and water feed for sealing water of the bowl in this order. In this way, the tool can be miniaturized and washed with an optimum volume of water.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a toilet flush water supply device having a water supply path to both a trap section and a bowl section of the toilet bowl.

(Prior art) A cleaning water supply device that independently supplies water to a bowl portion and a trap drainage channel is known from Japanese Patent Publication No. 55-30092, and this device has an electromagnetic on-off valve for each water supply channel. is equipped to control the water supply.

(Problem N to be solved by the invention) In conventional cleaning water supply devices, the amount of water supplied changes due to changes in water supply pressure. For this reason, if the water supply pressure is high, excessive washing water will be supplied, which is undesirable from the point of view of saving water.
On the other hand, when the water supply pressure is low, there is a problem in that there is insufficient flushing water and the flushing of the toilet bowl becomes incomplete.

In addition, the water supply to the bowl part can be divided into two parts: one for cleaning the bowl wall and the other for generating swirling water, to improve cleaning power, or a jet injection hole can be used to create a siphon effect on the water supply to the trap drainage channel. and a shower jet to improve the transport capacity of waste, and if each water supply device had an on-off valve mechanism, the water supply device would be large and it would be difficult to implement the cleaning device in the form of a toilet bowl. There was a problem.

The present invention has been made in view of the problems of the conventional technology, and its purpose is to supply a predetermined amount of flushing water to the toilet bowl without being affected by changes in water supply pressure. The purpose of the present invention is to provide a small-sized cleaning water supply device that can reliably perform cleaning.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a flow rate control valve and a flow rate detection means in a water supply pipe, a direction switching valve on the downstream side of the flow rate control valve, and a control device. The opening degree of the flow rate regulating valve and the switching time of the direction switching valve are controlled so that a preset amount of water is supplied to each part of the toilet based on the output of the flow rate detection means.

Further, the control device may control the opening degree of the flow rate regulating valve so that the output of the flow rate detection means becomes a preset instantaneous flow rate.

Furthermore, the control device can also control the opening degree of the flow rate regulating valve so that the output of the flow rate detection means follows a preset instantaneous flow rate pattern.

(Function) The present invention configured as described above supplies a predetermined amount of flushing water to each part of the toilet bowl at a predetermined timing.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a siphon jet type toilet bowl equipped with a cleaning water supply device according to the present invention. In the figure, a toilet bowl 1 includes a bowl portion 3 and a trap drainage channel 4, which are separated by a partition wall 2. The trap drainage channel 4 connects an inlet 5 opened at the lower part of the rear wall of the bowl part 3 and an outlet 6 opened at the rear bottom surface of the toilet bowl 1 by bending it into a substantially inverted U shape. The trap drainage channel 4 is a drainage channel 4 downstream from the base 4a which is the bent part.
b is formed into a substantially straight pipe shape, and a constricted portion 4 is formed at the lower end of the discharge path 4b.
Equipped with c. The constricted portion 4c is obtained by reducing the inner diameter of the discharge passage 4b in a direction perpendicular to the pipe wall of the discharge passage 4b.

Note that the constricted portion 4c does not necessarily have to be provided at the position of the outlet 6, which is the lower end of the discharge passage 4b, and may be provided, for example, at a substantially intermediate portion of the discharge passage 4b or at a position downstream from the intermediate portion.

In this trap drainage channel 4, a water sprinkling step 53 is provided on the pipe wall of the discharge channel 4b on the downstream side of the base 4a.

Therefore, when washing water is supplied beyond the base 4a,
The cleaning water is scattered by the water sprinkling step 53 and flows into the discharge path 4b.
A water seal is generated inside the trap drainage channel 4.
The air inside is discharged together with cleaning water to a drain pipe (not shown) connected to the outlet 6. Therefore, the atmospheric pressure inside the trap drainage channel 4 becomes negative pressure, and the accumulated water 25 in the bowl part 3 is drawn into the discharge channel 4b side, and the trap drainage channel 4 becomes in a siphon state filled with washing water. , filth, etc. in the bowl portion 3 is discharged.

In the toilet bowl 1 according to this embodiment, a rim passageway 9 is formed in the rim part 8 at the upper edge of the bowl part 3 in an annular shape so as to protrude inward of the bowl part 3, and the bottom surface of the rim passageway 9 Water injection ports 10 are opened obliquely to the bowl part 3 at appropriate intervals. In addition, the rim water supply channel 9 is connected to the rim water supply chamber 1 at the rear.
Contact 1.

The jet nozzle 12 is attached to the jet nozzle attachment hole at the bottom of the bowl part 3 in a watertight manner via an adhesive or the like, and the jet injection hole 12a of the jet nozzle 12 is connected to the inlet 5 of the trap drainage channel 4. It is oriented approximately at the center of the upwardly inclined conduit from the top to the base 4a. The jet nozzle 12 is made of metal, synthetic resin, or the like, and in this embodiment, the jet nozzle 12 has a hook-like shape.

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

The water supply device 14 includes a control device 15 which is a water supply control means,
push button switch 16a for large cleaning and small cleaning;
tab, an operation unit 16 which is a manual means for selecting the amount of cleaning water for inputting the selection input of the amount of cleaning water to the control device 15 and a cleaning start input at the same time, and a flow control valve with a water stop function that controls the amount of cleaning water supplied. 17. Flowmeter 19 to measure water supply flow rate
, a two-way switching valve 20 that switches between the water supply to the trap section and the bowl section provided downstream of the flow rate control valve 17, and an atmosphere release valve 18.21.

Further, the flow rate regulating valve 17 uses, for example, a pulse motor as a driving source, and the opening degree is determined according to the number of pulses.

One end of the flow rate control valve 17 is connected to a water supply pipe 23 via a flow meter 19.
and the other end is connected to the two-way switching valve 20. A water supply pipe 23a is connected to the inlet of the two-way switching valve 20, and one outlet of the switching valve 20 is connected to the water supply pipe 23a for supplying water to the rim water supply chamber 11 via an atmosphere release valve 18 provided in the rim water supply channel 9a. Mouth 1
Connect to 1a. The other outlet of the switching valve 20 is connected to the jet nozzle 12 via an air release valve 21 and a jet water conduit 24 made of metal, synthetic resin, or synthetic rubber.
Connect to the jet water supply port 12b. This jet water conduit 24 directly connects the water supply control system 14 and the jet nozzle 12, and is arranged along the rear lower surface of the bowl part 3 so that the length of the jet water conduit 24 is shortened. The other end of the water conduit 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 is opened on the jet water conduit side only when it is driven.

FIG. 2 is a block diagram of the control device.

The control device 15 includes an input interface circuit 15a1 and a microprocessor (MPU) 15b.

It is composed of a memory 15C, a timer 15d, an output interface circuit 15e, and an input interface 15a.
An operating section 16 and a flow meter 19 are connected, and a two-way switching valve 20 and a flow rate control valve 17 are connected to the output interface circuit 15e via water supply control lines 20a and 17a.

The operation unit 16 is configured to operate the toilet bowl 1 in order to start cleaning the toilet bowl 1.
8a and a switch 16b for urination are provided, and the opening and closing of these switches is manually inputted to the control device 15 via an activation signal line 16c.

Note that the operation unit 16 may be provided with a plurality of operation buttons so that the supply amount of cleaning water can be selected. In addition, a switch or a sensor for detecting seating is provided, and these signals are input to the control device 15 so that the operation of the operating section 16 is valid only when the user is seated, or after the state changes from the seated state to the non-seated state. , the cleaning may be started automatically after a predetermined period of time.

The flow meter 19 uses a blade wheel type flow meter. This flow meter 19
A magnet is attached to the impeller, which electromagnetically detects the rotation of the impeller and outputs an alternating electromotive force with a frequency proportional to the rotation of the impeller as a flow signal.

Note that an electromagnetic flowmeter or the like may be used as the flowmeter 19 in addition to the impeller type flowmeter.

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

Further, in this embodiment, the flow meter 19 is provided upstream of the flow rate control valve 17, but the flow meter 19 may be provided downstream of the flow rate control valve 17.

Note that water supply amount data, instantaneous flow rate, instantaneous flow rate pattern, and water supply timing data for large cleaning and small cleaning are preset in the memory 15c in the control device 15.

In the time chart shown in FIG. 3, in this embodiment, the amount of pre-cleaning water supplied from the rim water supply port 11a to the bowl part 3 at the start of cleaning is set to be smaller during small cleaning than during large cleaning,
Furthermore, the amount of jet water supplied following the pre-wash is smaller during small washes than during large washes. Therefore, since the amount of washing water supplied to the trap drainage channel 4 differs between large and small washing, the duration of the siphon action differs. For this reason, the time (t3L, t3S in FIG. 3) from stopping the jet water supply to starting the water sealing water supply to the bowl portion 3 is different for large and small cleaning. The amount of water supplied to the bowl portion 3 for water sealing is the same during large cleaning and small cleaning.

Next, press the push button switch le for deep cleaning of the operating section 16.
The operation in the case where cleaning is started in step a will be explained with reference to the flowchart in FIG. 4 and the time chart in FIG. 3.

In addition, in the flowchart of FIG. 4, S1 to Sit
indicates each step of the flowchart.

Starting signal from operation unit 16 The control device 15 controls the opening degree of the flow rate control valve 17 based on the output of the flow meter 19 so that the pre-cleaning water supply reaches a predetermined instantaneous flow rate. Supply wash water. The supplied washing water generates a vortex in the bowl part 3, and pre-washes the bowl part 3.

At this time, the microprocessor tsb counts the waveform-shaped pulse signal based on the flow rate signal of the flow meter 19 to obtain an integrated flow rate value, which matches the set value of the bowl pre-cleaning water amount previously set in the memory 15c. At that point, the control device 15, via the output interface circuit 15e,
The two-way switching valve 20 is driven to switch the water supply from the rim to the jet nozzle (S2.53), and the opening degree of the flow rate control valve 17 is controlled based on the output of the flow meter 19 so that the siphon water supply reaches a predetermined instantaneous flow rate. do. (S4).

As a result, cleaning water is jetted from the jet nozzle 12 into the trap drainage channel 4, and the jetted cleaning water fills the drainage channel 4 from the outflow port 6 while drawing in the air in the drainage channel 4. Since the water is drained to a drain pipe (not shown) connected to the outlet, a negative pressure is generated in the drain channel 4 and gradually increases. Due to this negative pressure, the accumulated water 25 in the bowl part 3
is drawn into the outlet 6 side beyond the neck portion 4a of the trap drainage channel 4, and the negative pressure increases rapidly, so that a siphon effect occurs in a short time after the jet is ejected.

The amount of cleaning water jetted from the jet nozzle 12 is determined as an integrated flow rate value based on the flow rate signal from the flow meter 19, similar to the bowl section described above, and is stored in advance in the memory 15c.
When the water supply amount for the jet matches the set value set in
S5. S6) and immediately starts the timer 15d.

Then, a preset predetermined time period elapses (S
7) and drives the two-way switching valve 20 to the rim side again (S
8) and flow meter 1 so that the sealed water supply has a predetermined instantaneous flow rate.
The opening degree of the flow rate control valve 17 is controlled based on the output of 9 (
S9). Then, when a preset amount of water for water sealing is supplied (StO), the flow control valve 17 is driven to the closed state (sii).

This completes a series of water supply controls shown in the time chart of FIG.

In addition, when using a flow control valve that does not have a water cutoff function, a directional switching valve with a water cutoff function may be used.

In addition, in the case of the flowchart shown in FIG. 5, the flow control valve 1 is operated based on the output of the flow meter 19 so that the pre-cleaning water supply, siphon water supply, and sealing water supply have a predetermined instantaneous flow rate pattern.
7 (S21, S24, 529), and the other processes are the same as those in the flowchart of FIG.

(Effects of the Invention) As described above, according to the present invention, the amount of water supplied is adjusted by the flow control valve based on the output of the flow rate detection means, so that reliable cleaning can be performed with an appropriate amount of cleaning water.

Furthermore, by using the directional switching valve, the number of valve mechanisms can be reduced and the device can be made smaller. Furthermore, when using multiple electromagnetic on-off valves, the water supply pipe must be branched downstream of the flow rate control valve and connected to the inlet of each electromagnetic on-off valve, and there are many pipe connection points. It is sufficient to simply connect the outflow port of the control valve and the inflow port of the directional switching valve, reducing the number of man-hours involved in assembling piping connections.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a toilet bowl equipped with a cleaning water supply device according to the present invention, FIG. 2 is a block diagram of the water supply device, and FIG. 3 is a time chart showing the operation of the water supply device of FIG. 4 and 5 are the same flowcharts. In the drawing, 1 is a toilet bowl, 14 is a cleaning water supply device (water supply device), 15 is a control device which is a water supply control means, 17 is a flow rate adjustment valve, 19 is a flow meter, 20 is a two-way switching valve, and 23 is a water supply device. It's a tube. Patent applicant: TOTOKIKI CO., LTD.

Claims (3)

[Claims] (1) A flow rate control valve and a flow rate detection means are provided in the water supply pipe, and a direction switching valve is provided downstream of the flow rate control valve, and the control device controls a preset water supply amount based on the output of the flow rate detection means. A flushing water supply device for a toilet bowl, characterized in that the opening degree of the flow control valve and the switching time of the direction switching valve are controlled so as to supply water to each part of the toilet bowl. (2) The toilet flush water supply device according to claim 1, wherein the control device controls the opening degree of the flow rate control valve so that the output of the flow rate detection means becomes a preset instantaneous flow rate. (3) The toilet flush water supply device according to claim 1, wherein the control device controls the opening degree of the flow rate control valve so that the output of the flow rate detection means follows a preset instantaneous flow rate pattern.