JPH0390718A - Cleaning water supply device for toilet bowl - Google Patents

Abstract

PURPOSE:To enable reliable washing of a toilet bowl by a method wherein a means to detect a flow rate of washing water is located in a water feed passage through which water is first fed, and a control device to control washing water, flowing through other water feed passage, to a given flow rate based on a detecting valve therefrom. CONSTITUTION:In a control device 15, by means of a starting signal from a control part 16, a valve mechanism 17 is opened, washing water is fed to a bowl part 3 of a toilet bowl 1 to perform prewashing. A feed water pressure is detected by a pressure sensor 19, and based on a detecting value, a water feed time of prewashing feed water, siphon feed water, and filling water and feed water is decided. Thereafter, a direction switching valve 20 is driven, the feed of water is switched from a rim 8 to a nozzle 12 for jet to effect siphon water feed for a given time. Further, the switching valve 20 is driven, and the feed of water is switched to the rim 8 side to effect filling with water and the feed of water for a given time.

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.

(Question B to be solved by the invention) For this reason, if the water supply pressure of the water supply pipe for cleaning water differs, the amount of cleaning water supplied to each part will vary, and if the water supply pressure is high, the amount of water more than the amount required for cleaning will vary. This is not preferable 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 an apparatus for supplying flush water to a plurality of water supply channels provided in a toilet bowl in a predetermined order, in which water is supplied first among the water supply channels. A means for detecting the flow rate of the cleaning water flowing through the water supply channel is provided in the water supply channel where the cleaning is performed, and a control device is provided for controlling the flow rate of the washing water flowing into the other water supply channels thereafter to a predetermined flow rate based on this detected value. It is characterized by

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 a signal corresponding to, for example, the water supply pressure or instantaneous flow rate value, and the control device supplies water to the water supply channel for a predetermined time based on these values. As a result, even if the water supply pressure fluctuates over a long period of time, a substantially constant amount of cleaning water can be supplied at all times.

(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 being bent in a substantially inverted 0 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 the lower end of the discharge passage 4b is provided with a constricted portion 4C. 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,
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 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, cleaning water is supplied to the constriction portion 4C from time to time over the entire circumference, and a stable water film state is generated even at a small flow rate, allowing efficient siphon action.

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 which is a washing water amount selection input means for giving a washing start input at the same time as a selection input of a washing water amount to the control device 15, a water supply valve mechanism 17 that controls the supply amount of washing water, and a rim. A pressure sensor 19 that measures the water supply pressure of the piping to the rim water supply chamber constituting the water supply channel, a direction switching valve 20 provided downstream of this pressure sensor that switches water supply to the trap section and the bowl section, and an atmospheric release valve 18. It consists of 21.

One end of the water supply valve mechanism 17 is connected to the water supply pipe 23, and the other end is connected to the direction switching valve 20.

A water supply pipe 20a is connected to the inlet of the directional switching valve 20, and one outlet of the switching valve 20 is connected to the water supply port of the rim water supply chamber 11 via the atmosphere release valve 18 provided in the rim water supply channel 9a. Connect to 11a. 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 pipe 24 connects the water supply device 14 and the jet nozzle 12.
It is arranged along the rear lower surface of the bowl part 3 so that the length of the jet water conduit 24 is shortened, and the other end of the jet water conduit 24 is connected to the jet water supply port of the jet nozzle 12. Connect to 12b. The direction 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 15d1, an output interface circuit 15e, and an input interface 15a.
The operating unit 16 and the pressure sensor 19 are connected, and the output interface circuit 15e is connected to the direction 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.
Switches 6a and 16b for urination are provided, and the opening and closing of these switches is input to the control device 15 through a starting signal line 16a.

The operation unit 16 may be provided with a plurality of operation buttons so as to select the amount of cleaning water to be supplied, and may also be provided with a switch or sensor for detecting seating, and these signals may be input to the control device 15. Alternatively, the operation of the operating unit 16 may be enabled only in the seated state, or the cleaning may be started automatically after a predetermined period of time after the seated state changes to the non-seated state.

The pressure sensor 19 uses a semiconductor pressure sensor.

This pressure sensor 19 detects pressure as a resistance value, and outputs, for example, a voltage signal according to this resistance value. The pressure signal input to the input interface circuit 15a through the pressure signal line 19a is waveform-converted within the input interface circuit 15a, and is converted into a pulse signal with a predetermined amplitude and a predetermined pulse width proportional to the frequency of the pressure signal. It 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.

Note that in the flowchart of FIG. 4, Sl to S8 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 s i ) and opens the bowl section 3 of the toilet bowl 1.
supply washing 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 15b measures the voltage signal based on the pressure signal of the pressure sensor 19 and determines the corresponding water supply time (S2). This water supply time is determined in addition to the water supply time for pre-cleaning, as well as the water supply time for siphon water supply and seal water supply, which will be described later. These water supply times are determined by searching a table of pressure values and water supply times previously set in the memory 15c. The reason why we decided to determine the subsequent water supply time based on the output value of the pressure sensor due to the first water supply in this way is because it is thought that there will be no large fluctuations in the water supply pressure during a series of water supply times. This is to reduce time and processing time. This water supply time is counted by the timer 15d, and after the time has elapsed, the control device 15 drives the direction switching valve 20 via the output interface circuit 15e to switch the water supply from the rim to the jet nozzle and perform siphon water supply. (S3°S4).

In this embodiment, an on-off valve and a direction switching valve are used, but two on-off valves may be arranged side by side, or a flow control valve may be used instead of an on-off valve for adjustment.

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 base 4a of the trap drainage channel 4, and the negative pressure increases rapidly, causing a siphon effect from the jet fountain in a short time. Occur.

The water supply time for the cleaning water spouted from the jet nozzle 12 is determined by the company in step 52 as described above, and after the water supply time has elapsed, the control circuit 15 switches the direction switching valve to the rim side (S6).

After the control device 15 opens the rim side in step S7, the water supply valve mechanism 17
is driven to the closed state (S8).

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

Although the above embodiments have been described with reference to the case where a pressure sensor is provided as a means for detecting the flow rate, the present invention may also include a flow rate sensor as a means for detecting the flow rate. explain.

FIG. 6 is a sectional view of a toilet bowl showing an embodiment in which a flow rate sensor 22 is provided in place of the pressure sensor 19 shown in FIG. This flow rate sensor 22 uses, for example, a blade wheel flow meter. This flowmeter has a magnet attached to the blade, and magnetically 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.

FIG. 7 is a flowchart showing the operation of the control device, which is the same as that shown in FIG. 4 except for the operation of determining each subsequent water supply time based on the instantaneous value of the flow rate sensor in step S2e. .

In each of the above embodiments, an example of controlling water supply to a jet nozzle as an example of water supply to a trap drainage channel has been described, but the present invention is not limited to such a jet nozzle, and for example, as shown in FIG. A water supply configuration may be adopted in which a shower 7 is provided instead of such a jet nozzle and water supply to the shower 7 is controlled.

(Effects of the Invention) As explained above, the cleaning water supply device according to the present invention performs flow rate control based on detected values regarding the flow rate such as instantaneous flow rate and water supply pressure, so even if fluctuations occur in the water supply pressure, A constant amount of flushing water can be supplied at all times, and the toilet bowl can be reliably flushed. Detection of the flow rate is performed at the first water supply, and subsequent flow rate control is performed based on the once detected value, so that sensing time and processing time can be reduced. Furthermore, there is no need to provide a detection means for each water supply channel, and the device can be made smaller, simpler, and lower in cost.

[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 of FIG. 3, FIG. 6 is a vertical sectional view of a toilet bowl showing another embodiment of the present invention, and FIG. 7 is an operation of another embodiment. FIG. 8 is a flowchart showing another embodiment of the water supply route. 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, Ila 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 operation unit, 17 is a water supply valve mechanism, 19 is a pressure sensor (means for detecting the flow rate), 20 is a direction switching valve, 22 is a flow rate Sensor (means for detecting flow rate)
It is.

Claims (3)

[Claims] (1) In a device that supplies flush water to a plurality of water supply channels provided in a toilet bowl in a predetermined order, the flow rate of the flush water flowing through the water supply channel is set to the first water supply channel among the water supply channels. 1. A flushing water supply device for a toilet bowl, characterized in that it is provided with a means for detecting the detected value, and is further provided with a control device that controls the flushing water flowing into other water supply channels to a predetermined flow rate based on the detected value. (2) The toilet bowl flushing water supply device according to claim (1), wherein the means for detecting the flow rate is constituted by a pressure sensor. (3) The toilet bowl flushing water supply device according to claim (1), wherein the means for detecting the flow rate is constituted by a flow rate sensor.