JPH0390711A - Cleaning water supply device for toilet bowl - Google Patents

Abstract

PURPOSE:To reduce the size of a device and to simplify the device 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 controlled so that washing water is fed, in a given order, to a given water feed port according to a preset flow rate. CONSTITUTION:A bowl part 3 and a trap drain passage 4 are mounted to a toilet bowl 1, a rim water pass passage 9 is disposed to a rim part 8, and a nozzle 12 for jet to the bottom port of the bowl part. A water supply device 14 is provided with a control device 15, a control part 16, a flow meter 19, and a two-way switching valve 20. When the control part 16 is operated, a feed water valve mechanism 17 is opened by means of the device 15, and washing water is supplied 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 preset at a memory 15c. Washing water is injected in a drain passage 4 through the nozzle 12, and when a flow rate coincides with the set value, the valve 20 is switched to the rim side to close the mechanism 17. This constitution reduces the size of a cleaning water supply device and simplifies the device.

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) For example, a technology for flushing a toilet by supplying flush water to the bowl of the toilet, to the trap drain, and then to the bowl in this order was developed in Japanese Patent Laid-Open No. 5
It is known from the publication No. 1-133942.

(Problem to be Solved by the Invention) However, this cleaning device has a channel in the main body, communicates an inlet near one end of the channel with an outlet at a spaced apart position, and also has a flow valve slidable within the channel. Since the flow valves are arranged freely and configured to switch the water flow by the sliding movement of the flow valves, the structure is complicated.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a flow rate detection means on the upstream side of an electrically operated valve mechanism that switches between water supply to the bowl of the toilet bowl and water supply to the trap drainage channel. Be prepared and
The flow rate is integrated based on the detection output of this flow rate detection means,
The present invention is characterized by comprising a control device that controls the valve mechanism so that a preset flow rate is supplied to a predetermined water supply port in a predetermined order based on the accumulated flow rate.

(Function) Since the valve mechanism is configured to be electrically driven to open and close, the device can be easily made smaller and simpler. Furthermore, since the valve mechanism is driven to open and close based on the cumulative flow rate, a predetermined amount of water can be supplied regardless of the pressure of 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 by bending it into a substantially inverted U shape. Trap drain 4
The discharge passage 4b on the downstream side of the bent portion 4a is formed into a substantially straight pipe shape, and a constricted portion 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 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 large number of protrusions 4d are provided on the pipe wall downstream of the neck portion 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, cleansing water is supplied to the inside of the passage around the entire circumference of the constricted portion 4C, and a stable water belly 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 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 sloping channel extending from the nuchal section 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. A flow meter 19 that measures the flow rate, and a two-way switching valve 20 that is installed downstream of this flow meter and switches between supplying water to the trap section and the bowl section. It consists of an atmosphere release valve 18 and 21.

One end of the 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. A water supply pipe 19a 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 19a 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 11
Connect to a. The other outlet of the switching valve 20 is connected to the jet water supply port 12b of the jet nozzle 12 via an atmosphere release valve 21 and a 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 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. 3 is a block diagram of the control device.

The control device 15 includes an input interface circuit 1581 and a microprocessor (MPU) 15b.

It is composed of a memory 15C, a timer 15d, and an output interface circuit 15e, and the human power interface 15a includes:
An operating unit 16 and a flow meter 19 are connected, and a two-way switching valve 20. is connected to the output interface circuit 15e via a water supply control line 20a. A water supply valve mechanism 17 is connected.

The operation unit 16 operates the toilet bowl 1 in order to start flushing the toilet bowl 1.
6a and a switch 16b for urine, the opening/closing of these switches is input to the control device 15 via a starting 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. , 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 blade, and the rotation of the wheel is electromagnetically detected, and an alternating electromotive force with a frequency proportional to the rotation of the wheel is output 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 of FIG. 4, 51 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 valve mechanism 17 (S t ) and supplies flush water to the bowl section 3 of the toilet bowl 1. The supplied washing water generates a vortex inside the bowl part 3, and pre-washes 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 from the flow meter 19 to obtain an integrated flow rate value or an instantaneous flow rate.
At the point when the amount of water for cleaning the bowl before washing matches the set value set in
5e, the two-way switching valve 20 is activated to switch the water supply from the rim to the jet nozzle (S2, S3).

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 at the time when the siphon continuous water supply amount that is preset based on the output signal of the flow meter 19 is supplied as described above. (S7).

This completes the continuous water supply control shown in the time chart of FIG.

In addition, in this embodiment, the operation part 1 is used for defecating and urinating.
By changing the set values of the amount of washing water for the rim and the jet in advance based on the output signal No. 6, the amount of water supplied for feces and urine can be changed.

In the above embodiment, an example in which water supply to a jet nozzle is controlled as an example of water supply to a trap drainage channel has been described. However, the present invention is not limited to such a jet nozzle. For example, as shown in FIG. A shower 7 may be provided instead of a jet nozzle such as the one shown in FIG. By sprinkling water from this shower, a negative pressure is created in the trap drain, and this negative pressure draws cleaning water into the toilet bowl into the trap drain, facilitating siphon action and enhancing the cleaning effect. It is.

Further, although the flow meter 19 is provided on the upstream side of the valve mechanism 17, it may also be provided on the downstream side.Furthermore, the two-way switching valve branches the water supply pipe downstream of the flow meter as shown in FIG. For example, a valve mechanism 32, 33 such as a T-magnetic valve may be provided on each of the branched pipes 30 and 31.

(Effects of the Invention) As explained above, since the cleaning water supply device according to the present invention has a configuration in which the opening and closing of the valve mechanism is electrically driven, the device can be made smaller and simpler. It is also possible to implement. Further, it is possible to effectively flush the toilet bowl with an appropriate amount of flushing water depending on the usage status of the toilet bowl. Furthermore, since the valve is driven to open and close based on the cumulative flow rate, a predetermined amount of water can be supplied regardless of the pressure of the water supply pipe. ,

[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 vertical sectional view of a toilet bowl showing another embodiment of the present invention, and FIG. 7 is a time chart showing the operation of the water supply device shown in FIG. 3. It is a figure which shows another Example. 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, 11a 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.

Claims (1)

[Claims] A flow rate detection means is provided upstream of an electrically operated valve mechanism that switches water supply to the bowl portion of the toilet bowl and water supply to the trap drainage channel, and the flow rate is integrated based on the detection output of the flow rate detection means, 1. A toilet flushing water supply device comprising: a control device that controls the valve mechanism so that a preset flow rate based on the accumulated flow rate is supplied to a predetermined water supply port in a predetermined order.