JPH0390712A - Cleaning water supply device for toilet bowl - Google Patents

Abstract

PURPOSE:To perform reliable washing by a method wherein based on a detecting output from a flow rate detecting means, a flow rate is integrated, and a valve mechanism is switched and controlled so that washing water is fed, in a given order, to a plurality of water feed ports according to a preset flow rate. CONSTITUTION:A toilet bowl 1 is provided with a bowl part 3 and a trap drain part 4, a rim water pass passage 9 is disposed to a rim part 8, and a nozzle 12 for jet to the bowl part 3. A water supply device 14 is provided with a control part 15, a control part 16, a mechanism 17 for feed water, a flow meter 19, and a two-way switching valve 20. When the control part 16 is operated, the mechanism 17 is opened by the device 15, and washing water is fed to the bowl part 3, the valve 20 is switched to the nozzle 12 side at a point of time when a flow rate coincides with a set value set at a memory 15c. Washing water is injected in the drain passage 4 through the nozzle 12, and the valve 20 is switched to the rim side at a point of time when a flow rate coincides with a set value, and the mechanism 17 is closed. This constitution enables execution of reliable washing.

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.

(Conventional technology) After supplying water to the trap drainage channel and discharging filth and sewage,
A cleaning water supply device for cleaning and sealing the bowl by supplying water to the bowl is known from Japanese Patent Publication No. 55-30092.

This cleaning water supply device includes two solenoid valves, one for the bowl portion and one for the trap, and is configured to open each solenoid valve for a preset time.

(Problem to be solved by the invention) For this reason, if the water supply pressure of the water supply pipe for washing water differs, the amount of washing water supplied to each part will vary, and if the water supply pressure is high, more water than necessary for washing will be supplied. This is not desirable in terms of water conservation, and conversely, if the water supply pressure is low, waste removal and bowl cleaning may become insufficient.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a flow rate detection means installed upstream of a valve mechanism that is electrically operated to switch the water supply from a plurality of water supply ports such as the bowl portion of a toilet bowl and a trap drain. The present invention is characterized by comprising a control device that integrates the flow rate based on the detection output of the flow rate detection means and switches and drives the valve mechanism in a predetermined order based on the integrated flow rate.

(Function) Since the supply amount of cleaning water is determined based on the detection output of the flow rate detection means, a predetermined amount of cleaning water can be supplied at all times regardless of pressure fluctuations in the water supply pipe.

(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 toilet bowl equipped with a cleaning water supply device according to the present invention. In the figure, reference numeral 1 indicates a siphon jet type toilet bowl, and the toilet bowl 1 includes a bowl portion 3 separated by a partition wall 2 and a trap drainage channel 4.

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 in a substantially inverted U-shaped constant bend. Trap drain 4
The discharge passage 4b on the downstream side of the base 4a, which is the bent part, is formed into a substantially straight pipe shape, and a constricted part 4c is provided at the lower end of the discharge passage 4b. This constriction part 4C makes the inner diameter of the discharge passage 4b
The diameter is reduced in the direction perpendicular to the tube wall of b. In addition,
This constriction part 4 c it 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 an approximately intermediate portion of the discharge passage 4b or at a position downstream from the intermediate portion.

In such a trap drainage channel 4, a large number of protrusions 4d are provided on the pipe wall downstream of the base 4a. In the embodiment shown in FIG. 1, three stages of protrusions 4d are provided that extend around the inner periphery of the tube wall at predetermined intervals. The protrusion 4d is
Although they are arranged at predetermined intervals, as shown in Fig. 2, the phases of the positions where the protrusions 4d... are provided are shifted for each stage so that the cleaning water does not collide with any of the protrusions 4d... , while changing the flow so that it flows down uniformly over the entire circumference of the tube wall of the discharge path 4b. As a result, cleaning water is supplied to the inside of the passage around the entire circumference of the constriction portion 4C, and a stable water film state is generated even at a small flow rate, so that a siphon action can be efficiently caused.

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 passage 9 is located in the rim water supply chamber 1 apart from the rear part.
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;
16b, an operation unit 16 that is a washing water amount selection input means for inputting a washing water amount selection input and a washing start input to the control device 15 at the same time, a water supply valve mechanism 17 that controls the amount of washing water supplied, and a water supply. It consists of a flow meter 19 for measuring the flow rate, a two-way switching valve 20 for switching between water supply to a trap section and a bowl section provided downstream of this flow meter, and an atmosphere release valve 18.21.

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 20 via a flow meter 19. The water supply valve mechanism 17 is composed of, for example, a solenoid valve, which opens when a predetermined voltage is applied.

A water supply pipe 20a is connected to the inlet of the two-way switching valve 20,
One outlet of this switching valve 20 is connected to the rim water supply channel 9ae.
It is connected to the water supply port 11a of the rim water supply chamber 11 via the provided atmosphere release valve 18. The other outlet of the switching valve 20 is
It is connected to the jet water supply port 12b of the jet nozzle 12 via the atmosphere release valve 21 and the jet water conduit 24 made of metal, synthetic resin, synthetic rubber, or the like. 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 pipe 24 is connected to the jet nozzle 1
2 to the jet water supply port 12b. This two-way switching valve 20 is always open on the rim water passage 11 side,
The jet water conduit side is opened only when the jet is driven.

FIG. 3 is a block diagram of the control device.

The control device 15 includes a human power interface circuit 15a 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.
The operating unit 16 and the flow meter 19 are connected, and the output interface circuit 15e is connected to the two-way switching valve 20 and the water supply valve mechanism 17 via the water supply control line 20a.

The operation unit 16 operates the toilet bowl 1 in order to start flushing the toilet bowl 1.
It is equipped with a switch 6a1 for urine use 16b, and the opening/closing of this switch is inputted to the control device 15 through a start signal line 16a.

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 may be provided, and these signals may be input to the control device 15 to enable operation of the operating section 16 only when the user is seated, or after changing from the seated state to the non-seated state. , a configuration may be adopted in which automatic fishing starts cleaning 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.

Next, the operation of this embodiment will be explained with reference to the flowchart of FIG. 4 and the time chart of FIG. 5.

In addition, in the flowchart S of FIG. 4, SI to S7 indicate each step of the flowchart.

In response to the activation signal from the operating section 16, the control device 15 opens the water supply valve mechanism 17 (Sl) and supplies flush water to the bowl section 3 of the toilet bowl 1. The supplied cleaning water is sent to the bowl part 3.
A vortex is generated inside to pre-clean the bowl part 3. At this time, the microprocessor 15b counts the pulse signal whose waveform has been shaped based on the flow rate signal of the flow meter 19 to obtain an integrated flow rate value or an instantaneous flow rate, and sets the bowl pre-washing water amount previously set in the memory 15c. When the value matches the value, the control device 15 outputs the output interface circuit 15e.
via the two-way switching valve 20 to switch the water supply from the rim to the jet nozzle (32.33).

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, and at the same time, the water flows out from the outlet 6 while entraining the air in the drainage channel 4. Since the exhaust is discharged 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 over the neck part 4a of the trap drainage channel 4, and the negative pressure increases rapidly, causing the jet fountain to act as a siphon in a short time. occurs.

The amount of cleaning water spouted from the jet nozzle 12 is determined as an integrated or instantaneous flow rate based on the flow rate signal of the flow meter 19, similar to the bowl part described above, and is determined from the jet water supply amount set in advance in the memory 15c. When the setting value matches the set value, the control circuit 15 switches the two-way switching valve to the rim side (S4, S5).

After driving the rim side to the closed state in step S4, the control device 15 closes the valve mechanism 17 when a preset amount of sealing water is supplied based on the output signal of the flow meter 19, as described above. Drive (S7).

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

In addition, in this embodiment, the water supply amount for feces and urination is changed by changing the set values of the amount of washing water for rim and jet in advance for defecation and urination.

As described above, this embodiment has been described with reference to an example in which water supply to a jet nozzle is controlled as an example of water supply to a trap drainage channel. However, the present invention is not limited to such a jet nozzle; for example, as shown in FIG. A water supply configuration may be adopted in which a shower 7 is provided in place of the jet nozzle, and the water supply to the shower 7 is controlled. The shower 20a is installed in the trap drain on the downstream side from the base of the trap drain 4, and by sprinkling water from this shower, the inside of the trap drain becomes negative pressure, and this negative pressure washes the toilet bowl. Water is drawn into the trap drain,
It easily causes siphon action and enhances the cleaning effect.

Further, although the flow meter 19 is provided upstream of the valve mechanism 17, it may be provided downstream. Furthermore, the two-way switching valve branches the water supply pipe downstream of the flow meter 19 as shown in FIG.
33 may be provided. Alternatively, as shown in FIG. 8, both jet water supply and shower water supply may be combined, and the rim water supply, jet water supply, and shower water supply may be controlled by valve mechanisms 34, 35, and 36, respectively.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, the supply amount of cleaning water is determined based on the detection output of the flow rate detection means, so that the amount of water supplied is always maintained regardless of pressure fluctuations in the water supply pipe. A predetermined amount of flushing water can be supplied, and the toilet bowl can be reliably flushed.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a toilet bowl equipped with a cleaning water supply device according to the present invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, Fig. 3 is a block diagram of the water supply device, and Fig. 4 is 5 is a time chart showing the operation of the water supply device shown in FIG. 3, FIG. 6 is a longitudinal cross-sectional view of a toilet bowl showing another embodiment of the present invention, and FIGS. 7 and 8 are It is a figure which shows another Example of a washing|cleaning water supply apparatus. In the drawings, 1 is a toilet bowl, 3 is a bowl part, 4 is a trap drainage channel, 9 is a rim water passage, lla is a rim water supply port, 12 is a jet nozzle, 12b is a jet water supply port, and 14 is a cleaning water supply device. (Water supply device), 15 is a control device which is a water supply control means, 16 is an operating section, 17 is a water supply valve mechanism, 19 is a flow meter, and 20 is a two-way switching valve. Patent Applicant Totokiki Co., Ltd. Agent Patent Attorney 2 1) Yong-Immediate Question
Patent attorney Kuni Ohashi Production volume Patent attorney
Yu Koyama (Continued from Figure page 0) Inventor: Noboru Niihara 76-2-8-1 Chigasaki Factory, Honmura, Chigasaki City, Kanagawa Prefecture Toto Kiki Co., Ltd.

Claims (1)

[Claims] A flow rate detection means is provided on the upstream side of an electrically operated valve mechanism to switch the water supply from a plurality of water supply ports such as a toilet bowl portion and a trap drain, and the flow rate is integrated based on the detection output of this flow rate detection means. A flushing water supply device for a toilet bowl, comprising a control device that switches and drives the valve mechanism in a predetermined order based on the accumulated flow rate.