JPH0390729A - Cleaning water supply device for toilet bowl - Google Patents

Abstract

PURPOSE:To permit a toilet bowl to be washed effectively by providing a controller to adjust the valve travel of a flow regulating valve on the basis of output signals from a pressure sensor in such a way as to supply water at a flow rate closer to a preset flow rate pattern to a water supply port. CONSTITUTION:In a controller 15, whether operation is made for feces or urine is judged to determine the valve travel of a flow regulating valve 20 for a trap and also of a flow regulating valve 17 so that flow rates per unit time on the basis of the supply time of prewashing water and water by siphon as well as signals from a pressure sensor 19 become a given one. After the valve 17 is opened for ventilating water supply, the valve travel is further increased to make prewashing water supply. At the same time, the valve 20 is opened for ventilating water supply. As the same time as the valve 17 is closed, the valve 20 is greatly opened for water supply by siphon, and the valve 20 is then closed slightly for push-in water supply. The valve 20 is further closed and the valve 17 is opened for sealing water supply. Afterwards, the valve 17 is closed.

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.

(Psum 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 rate control performed by the device is only to control the water supply time, and it is not possible to adjust the flow rate per unit time, making it impossible to perform effective water supply control according to the water supply purpose. If the water supply pressure of the pipes differs, the amount of cleaning water supplied to each part will vary. If the water supply pressure is high, more water than is required for cleaning will be supplied, which is unfavorable in terms of water conservation, and on the other hand, if the water supply pressure is low, waste will be discharged. or the bowl may not be sufficiently cleaned.

(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 flow control valve is provided on at least one of the water supply pipes to supply flush water to the plurality of water supply ports of the toilet bowl, and the flow rate approaches a preset flow pattern for each water supply port based on the output signal of the pressure sensor. A control device is provided for adjusting the opening degree of the flow control valve to supply water accordingly.

(Function) By adjusting the flow control valve based on the detected water supply pressure, water can be supplied according to a predetermined flow pattern regardless of the water supply pressure, and the toilet bowl can be effectively flushed.

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

FIG. 1 is a vertical cross-sectional view of a toilet bowl equipped with a cleaning water supply device according to the present invention. In FIG. 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 ring part 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,
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 projections 4d are provided on the pipe wall downstream of the ring 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, the cleaning water is supplied to the constriction portion 4C substantially uniformly 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 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 inlet 5 to ring 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 giving washing water amount selection manual input and washing start input to the control device 15 at the same time, a pressure sensor 19 that detects 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 pipe 24 is shortened, and the other end of the jet water conduit pipe 24 is connected directly to the jet nozzle 12. Connect to the jet water supply port 12b of the nozzle 12.

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) 15b1, 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 operation unit 16 includes push button switches 16a and 16b for large cleaning and small cleaning, and the opening and closing of these switches is easy! The signal is input to the control device via the III 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 at a small flow rate to remove air 30. Next, pre-cleaning water supply 31 is carried out at a large flow rate to swirl the water accumulated in the bowl part and increase the cleaning power, and after that, water sealing is performed to seal the bowl part after pushing water into the trap drainage channel, which will be described later. There are three types of water supplies: water supply 32;

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 (nwl, . . . 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. (Sl). Next, open the flow control valve for the bowl by Q1.
Open to open and supply air with low flow rate water supply for a predetermined time t.
1 (S2 and 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 an 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 (34);
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 (S
5), such water supply is performed for a predetermined time t2 determined in the step (Sl) (Sa), and the time t
After 2 elapses, close the bowl flow rate control valve 17 (S7).
While stopping the pre-cleaning water supply, the trap flow control valve 20
is opened in Q5, and siphon water is supplied over a predetermined time t3 with a large flow water supply state (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 flows down approximately evenly over the entire circumference of the pipe wall of the discharge passage 4b while changing the flow, and is throttled. Part 40
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 is discharged from the outlet 6 along with the cleaning water as shown in the figure. It is discharged to the drain pipe side. Therefore, negative pressure is generated in the trap drain 4, and the standing water 25 in the bowl part 3 is drawn into the trap drain 4, creating a complete siphon state in which the trap drain 4 is filled with washing water. Become.

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 (StO)
.

After this forced water supply is performed for a preset time t4 (Sll), the control device closes the trap flow rate control valve 20 (S12). 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 rate water supply state, and after sealing water supply for a time t5 (S13, 514), the bowl flow rate control valve 17 is closed (315).

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

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.

Further, the water supply pattern may also be as shown in FIGS. 7 and 8 instead of the one shown in FIG.

The shower 7 is installed in 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 also be configured to be attached to the wall of the toilet or the like.

Further, 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 description, according to the present invention, by adjusting the flow rate control valve based on the detected water supply pressure, water is supplied according to a predetermined flow rate pattern regardless of the water supply pressure. The toilet bowl can be cleaned effectively.

[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 Fig. 3 is a time chart showing the operation of the water supply device, Fig. 5 is the same flowchart, Fig. 6 is a vertical sectional view of a toilet bowl showing a toilet bowl according to another embodiment of the present invention, and Figs. 7 and 8 are It is a time chart which shows another example of operation of a water supply device. 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 tab 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] A pressure sensor is installed in the water supply pipe to detect the water supply pressure, and the water supply pipe is branched downstream of this pressure sensor, and a flow rate control valve is provided on at least one of each branched water supply pipe to connect the toilet bowl to multiple water supply ports. A control device configured to supply cleaning water and adjusting the opening degree of the flow rate control valve so as to supply water to each water supply port so as to approach a preset flow rate pattern based on the output signal of the pressure sensor. A toilet bowl cleaning water supply device featuring: