JPH0390728A - Cleaning water supply device for toilet bowl - Google Patents

Abstract

PURPOSE:To permit a bowl to be washed exactly by providing a controller to control a flow regulating valve to a preset valve travel on the basis of detected pressures of a pressure sensor set on a water supply tube. CONSTITUTION:In a controller 15, whether operation is made for feces or urine is judged by starting signal from an operator 16. The valve travels of flow regulating valves 17 and 20 for a bowl and a trap are determined so that the supply time of prewashing water and also of water by siphon and flow rate per unit time on the basis of output signal from a pressure sensor 19 become given values. The valve 17 is put to a small flow rate water supply condition for ventilating water supply for a given time and then set to a great flow rate water supply condition for siphon-water supply for a given time. At the same time, the valve 20 is set to a small flow rate water supply condition for ventilating water supply for a given time and then set to a great flow rate water supply condition for siphon-water supply for a given time. The valve 20 is put to a medium flow rate water supply condition for push-in water supply, and the valve 20 is closed and the valve 17 is opened for sealing water supply under a small flow rate water supply condition.

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) However, the solenoid valve in such a conventional water supply device only has a fixed opening degree and does not have an adjustment function of changing the opening degree to various sizes. The flow control performed by the device only controls the water supply time, and the flow rate per unit time cannot be adjusted, making it impossible to perform effective water supply control according to the purpose of water supply. In addition, if the water supply pressure of the water supply pipe for washing water is different, the amount of washing water supplied to each part will vary, and if the water supply pressure is high, more water than is necessary for washing will be supplied, which is not desirable in terms of water conservation, and conversely, the amount of water supplied to each part will change. If the water pressure is low, waste removal and bowl cleaning may not be sufficient.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention provides a pressure sensor for detecting water supply pressure in a water supply pipe, branches the water supply pipe downstream of this pressure sensor, and A control device that provides a flow rate adjustment valve on at least one of the water supply pipes and connects it to a plurality of water supply ports of the toilet bowl, and controls the flow rate adjustment valve to a preset opening degree in response to the pressure detected by the pressure sensor. will be established.

(Function) Since the opening degree of the flow control valve is adjusted according to the water supply pressure, a constant flow rate is always obtained, and a constant amount of cleaning water can be supplied for a predetermined cleaning time.

(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 downstream 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 need 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.

The toilet bowl 1 according to the present embodiment has a rim passageway 9 formed in an annular shape on the rim part 8 at the upper edge of the bowl part 3 so as to protrude inward of the bowl part 3. Water injection ports 10 are opened diagonally to the bowl part 3 at appropriate intervals on the bottom surface. 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 mounting hole at the bottom of the bowl part 3 in a watertight manner via a packing or adhesive, and the jet injection hole 12a of the jet nozzle 12 is connected to the flow of the trap drainage channel 4. From entrance 5 to nuchal section 4
It is oriented approximately at the center of the upwardly inclined pipe leading to point a. 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 operating section 16 which is a washing water amount selection input means for inputting a washing water amount selection input to the control device 15 and at the same time inputting manual power for starting washing, a pressure sensor 19 for detecting the water supply pressure of the water supply pipe 23, and a bowl section. 3, a bowl flow control valve 17, an atmosphere release valve 18, a trap flow control valve 20, which controls water supply to the jet nozzle 12, and an atmosphere release valve 21, which controls water supply to the trap drainage channel. It consists of

One end of the bowl flow control valve 17 is connected to a water supply pipe 23 provided with a pressure sensor 19, and the other end is connected to the rim water supply port 11a of the rim water passage chamber 11 via an atmosphere release valve 18.

One end of the trap flow control valve 20 is connected to the water supply pipe 23, and the other end is connected to the jet water conduit pipe 24 via the atmosphere release valve 21.
Connect to one end of the This jet water conduit 24 is made of metal.
Water supply control system 1 using synthetic resin or synthetic rubber pipes
4 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 directly to the jet nozzle 12. connection to the jet water supply port 12b of the nozzle 12 for use.

FIG. 3 is a block diagram of the water supply device.

The control device 15 includes an input interface circuit 15a1, a microprocessor unit (MPU) 15b, and a memory 15.
It is composed of a C1 timer 15d and an output interface circuit 15e, and the input interface 15a includes an operation section 16.
and a pressure sensor 19 are connected, and a bowl flow rate control valve 17 and a trap flow rate control valve 20 are connected to the output interface circuit 15e.

The operating section 16 includes push button switches t6a and 16b for large cleaning and small cleaning, and the opening and closing of these switches is input to the control device through an activation signal line 16c.

As the pressure sensor 19, for example, a semiconductor pressure sensor that converts pressure into a resistance value is used.

Bowl flow control valve and trap flow control valve 17
．． 20 uses, for example, a pulse motor for each drive source, and the opening degree is determined according to the number of pulses. 17a, 20
A is a signal line for driving each control valve 17, 20, respectively.

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

As is clear from the time chart shown in FIG. 4, in this embodiment, the water supply pattern to the bowl part and the trap drainage channel is determined respectively, and the water supply pattern to the bowl part first drains the air in the rim water passage. Air purge water supply 30 is carried out at a small flow rate to remove the air, then pre-cleaning water supply 31 is carried out at a large flow rate to swirl the accumulated water in the bowl part and increase the cleaning power, and then, after the water is pushed into the trap drainage channel as described later, water supply 31 is carried out. There are three types of water supplies: a water sealing water supply 32 for sealing the bowl portion.

On the other hand, the water supply pattern to the trap drainage channel is as follows: Air purge water supply 33 is performed at a small flow rate to eliminate air in the jet water conduit 24, which is the trap water supply channel, and then a large flow rate is performed to cause a siphon effect to increase cleaning power. There are three types of water supply: a siphon water supply 34 which is carried out at 100 mA, and a forced water supply 35 which is then carried out at a medium flow rate to force the waste into the trap drain.

In addition, two types of water supply patterns are defined, one for defecation and one for urine, based on the signal from the operation unit, and the amount of water supplied for pre-washing and siphon water for defecation is larger than that for urine, and the cleaning power is improved. At the same time, efforts have been made to conserve water when urinating.

Hereinafter, the operation of this embodiment will be explained according to the flowchart shown in FIG.

First, it is determined whether the operation for urination or urination has been performed based on the activation signal from the operation section, and based on this determination, the pre-cleaning water supply time t2 and the siphon water supply time t3 are used, as well as the output signal of the pressure sensor 19. The opening degree Qn (nxl, . . . 6) of each flow rate control valve is determined so that the flow rate per unit time becomes the predetermined flow rate shown in the time chart of FIG. 4. (Sl). Next, open the flow control valve for the bowl Q.
1, and water supply is performed for a predetermined period of time t1 with air removed in a low flow water supply state (S2, S3). This time t1 is given in advance, and is counted by starting the timer 15d simultaneously with water supply. When the predetermined time t1 has elapsed, the flow control valve for the bowl is opened to the opening degree Q2, and a pre-cleaning water supply is performed in which the water accumulated in the bowl part is swirled to provide a large flow water supply state (S4).
. At the same time, the trap flow rate control valve 20 is opened to Q4, and the trap drainage channel is vented and water is supplied with a small flow rate water supply state (
S5), this water supply is carried out over the predetermined time t2 determined in the step (Sl) (S6). After time t2 has elapsed, the bowl flow rate control valve 17 is closed (S7
) While stopping the pre-cleaning water supply, the trap flow control valve 2
0 to Q5, a large flow water supply state is established, and siphon water supply is performed for a predetermined time t3 (S8, S9).

Thereby, the cleaning water is vigorously jetted into the trap drainage channel 4 from the jet injection hole 12a of the jet nozzle 12. Therefore, the amount of washing water flowing into the discharge passage 4b over the neck portion 4a of the trap drainage passage 4 increases, and the force of the washing water also becomes stronger.

The washing water that has exceeded the neck portion 4a collides with the protrusions 4d provided on the inner wall of the discharge passage 4b, and while changing its flow, it flows down over the entire circumference of the pipe wall of the discharge passage 4b, and is throttled. Part 4C
Forms a water film on the area. Due to the formation of this water film, the inside of the trap drainage channel 4 is isolated from the atmosphere, and as the upstream side of this water film is filled with cleaning water, the air inside the trap drainage channel 4 flows out from the outlet 6 (not shown) together with the cleaning water. It is discharged to the drain pipe side. For this reason, the trap drainage channel 4
Negative pressure is generated inside, and the standing water 25 in the bowl part 3 is drawn into the trap drainage channel 4, and the trap drainage channel 4 is filled with cleaning water and becomes a complete siphon state.

This siphon state continues for a while even after time t3 has elapsed, and at this time the trap flow rate control valve is opened at Q6 to enter the medium flow water supply state and perform forced water supply (SIO)
.

After this forced water supply is performed for a preset time t4 (Sit), the control device closes the trap flow control valve 20 (312). Then, at the same time as closing the trap flow rate control valve, the bowl flow rate control valve 17 is closed again.
6 to enter a low flow water supply state, and after sealing water supply for a time t5 (S13.514), the bowl flow rate control valve 17 is closed (S15).

This completes the series of water supply controls shown in FIG. In addition,
Even if the water supply pressure is low and the opening degree is fully opened, if the predetermined flow rate is not reached, measures such as making the opening time longer than a preset time are taken.

In addition, in this embodiment, the trap flow rate control valve 20 is
Although the configuration was designed to control water supply to the jet nozzle,
The present invention is not limited to the control of such a jet nozzle; for example, a shower 7 may be provided instead of the jet nozzle as shown in FIG. 6, and the water supply to the shower 7 may be controlled.

The shower 7 is provided inside the trap drain on the downstream side by the neck of the trap drain 4, and by sprinkling water from this shower, a negative pressure is created in the trap drain, and this negative pressure causes flushing water to flow into the toilet bowl. is drawn into the trap drainage channel to easily cause siphon action and enhance the cleaning effect. In addition, although the embodiment has shown a configuration in which the cleaning water supply device is built into the toilet bowl, the cleaning water supply device may be configured to be attached to the wall of the toilet or the like.

In FIG. 6, objects similar to those in FIG. 1 are given the same reference numerals.

(Effects of the Invention) As is clear from the above explanation, the present invention is capable of adjusting the opening degree of the flow rate control valve according to the water supply pressure, so that a constant flow rate can always be obtained regardless of the water supply pressure, and a predetermined cleaning can be achieved. A constant amount of cleaning water can be supplied over time, ensuring reliable cleaning.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a toilet bowl equipped with a cleaning water supply device according to the present invention, Fig. N2 is a cross-sectional view taken along the line ll-H in Fig. 1, Fig. 3 is a block diagram of the water supply device, and Fig. 4 is a FIG. 3 is a time chart showing the operation of the water supply device, FIG. 5 is a flowchart of the same, and FIG. 6 is a longitudinal cross-sectional view of a toilet bowl showing a toilet bowl according to another embodiment of the present invention. 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, 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; 1
6a and 16b are push button switches for large and small washes, 17 is a flow rate control valve for the bowl, 19 is a pressure sensor, 20
20a is a trap flow rate control valve.

Claims (1)

[Claims] In addition to installing a pressure sensor in the water supply pipe to detect the water supply pressure, the water supply pipe is branched downstream of this pressure sensor, and a flow rate control valve is provided in at least one of each branched water supply pipe to connect multiple water supply ports of the toilet bowl. A flushing water supply device for a toilet bowl, characterized in that a control device is connected to the flow control valve and controls the flow rate control valve to a preset opening degree in accordance with the detected pressure of the pressure sensor.