JP2758664B2 - Toilet flush water supply - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flush water supply device for a toilet capable of independently supplying flush water to a plurality of water inlets of the toilet.

(Prior Art) Japanese Patent Publication No. 55-30092 discloses a flush water supply device for independently supplying flush water to a trap drainage channel and a rim water supply channel of a toilet bowl.

This device is provided with two solenoid valves, and the control device controls opening and closing of each solenoid valve to supply water to the trap drainage channel and then to the rim water channel.

(Problems to be Solved by the Invention) In the conventional cleaning water supply device, the water supply amount changes due to a change in water supply pressure. For this reason, when the water supply pressure is high, washing water is supplied excessively, which is not preferable in terms of water saving. Conversely, when the water supply pressure is low, there is a shortage of washing water and cleaning of the toilet becomes incomplete. Had.

The present invention has been made in view of such problems of the conventional art, and has as its object to supply a predetermined amount of flush water without being affected by a change in water supply pressure. It is an object of the present invention to provide a washing water supply device that can surely perform washing.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides an apparatus for branching a water supply pipe for supplying cleaning water to a toilet and supplying cleaning water to each part of the toilet, wherein a flow rate of the water supply pipe is adjusted. In addition to providing a valve,
An automatic open / close valve is provided in each of the branch water supply pipes, and the control device controls the flow rate control valve so as to have a preset opening degree and controls the open time of the automatic open / close valve.

(Operation) The present invention configured as described above supplies a predetermined amount of washing water to each part of the toilet at a predetermined timing.

(Example) Hereinafter, an example of the present invention is described based on an accompanying drawing.

FIG. 1 is a longitudinal sectional view of a siphon jet type toilet provided with a flush water supply device according to the present invention. Toilet 1 in the figure
Is provided with a bowl part 3 and a trap drainage channel 4 partitioned by a partition wall 2. The trap drainage channel 4 connects an inflow port 5 formed in a lower portion of a rear wall of the bowl portion 3 and an outflow port 6 formed in a rear bottom surface of the toilet 1 in a substantially inverted U-shape. The trap drainage channel 4 is a drainage channel 4b downstream of the weir portion 4a that is the bent portion.
Is formed in a substantially straight pipe shape, and a throttle 4c is provided at the lower end of the discharge path 4b. The throttle portion 4c is obtained by reducing the inner diameter of the discharge path 4b in a direction perpendicular to the pipe wall of the discharge path 4b. Note that the throttle portion 4c does not necessarily need to be provided at the position of the outlet 6 which is the lower end of the discharge path 4b, and may be provided at, for example, a substantially intermediate portion of the discharge path 4b or a position downstream of the intermediate portion.

In the trap drainage channel 4, a sprinkling step 53 is provided on the pipe wall of the drainage channel 4b downstream of the weir portion 4a.

Therefore, when washing water is supplied beyond the weir portion 4a,
The washing water is scattered by the watering steps 53 to generate a water seal in the discharge passage 4b, and discharges the air in the trap drain passage 4 together with the washing water to a drain pipe (not shown) connected to the outlet 6. As a result, the pressure inside the trap drainage channel 4 becomes negative with respect to the atmospheric pressure, the pool water 25 in the bowl portion 3 is drawn into the drainage channel 4b, and the inside of the trap drainage channel 4 becomes a siphon state filled with washing water. Then, the waste and the like in the bowl portion 3 are discharged.

In the toilet 1 according to the present embodiment, a rim water passage 9 is formed in an annular shape on the rim portion 8 at the upper peripheral edge of the bowl portion 3 so as to protrude inward of the bowl portion 3, and the bottom surface of the rim water passage 9 is formed. Water outlets 10 are formed obliquely with respect to the bowl 3 at appropriate intervals. In addition, the rim water passage 9 has a rim water supply chamber 11 at the rear.
Contact

The jet nozzle 12 is attached to the jet nozzle mounting hole at the bottom of the bowl portion 3 in a watertight state via an adhesive or the like. The jet injection hole 12a of the jet nozzle 12 is connected to the inflow port 5 of the trap drain passage 4. It is directed substantially at the center of the upward inclined pipe line from the upper part to the weir portion 4a. The jet nozzle 12 is formed of metal, synthetic resin, or the like. In the present embodiment, the jet nozzle 12 has a hook shape.

A box 13 is provided at the upper rear of the toilet 1
A cleaning water supply device (hereinafter referred to as a water supply device) 14 is housed in the device 13.

Water supply device 14, a control device 15 is a water supply control receiving means,
Push button switches 16a, 16b for large and small washing
And an operation unit 16 serving as a washing water selection input means for giving a washing start input to the controller 15 simultaneously with the selection input of the washing water amount, a flow control valve 19 for controlling a flow rate, and a bowl unit 3.
Automatic opening / closing valve 17 for rim for controlling water supply to the jet, and automatic opening / closing valve 20 for jet and atmosphere opening valve 21 for controlling water supply to the jet nozzle 12 and constituting the automatic opening / closing valve for the trap of the present invention.
Consists of

One end of the rim automatic opening / closing valve 17 is connected to a water supply pipe 23 through a flow control valve 19, and the other end is connected to a rim water inlet 11a of the rim water chamber 11.
Connect to

One end of the automatic opening / closing valve 20 for the jet is also an automatic opening / closing valve 17 for the rim
In the same manner as described above, it is connected to the water supply pipe 23 via the flow control valve 19, and the other end is connected to one end of the jet water pipe 24 via the atmosphere opening / closing valve 21. The jet water pipe 24 is a pipe made of metal, synthetic resin or synthetic rubber, and directly connects the water supply control system 14 and the jet nozzle 12. 3 and the other end of the jet water pipe 24 is connected to the jet nozzle 12
To the jet water inlet 12b.

Note that a structure in which the flush water supply device 14 is not built in the toilet 1 but is disposed on a wall of a toilet or the like may be employed.

 FIG. 2 is a block diagram of a water supply device.

The control device 15 includes an input interface circuit 15a, a microprocessor unit (MPU) 15b, a memory 15c, a timer 1
5d, an output interface circuit 15e, the input interface 15a is connected to the operation unit 16, and the output interface circuit 15e is connected to the flow control valve 19, the rim automatic on-off valve 17, and the jet automatic on-off valve 20. You.

The operation unit 16 includes push buttons 16a and 16b for large washing and small washing, and the opening and closing of these switches is input to the control device via a start signal line 16c.

The rim and jet automatic opening / closing valves 17 and 20 are constituted by, for example, solenoid valves, and these solenoid valves are used to open and close when a predetermined voltage is applied. 17a, 19a, 20a are each valve 17,
Signal lines for driving 19 and 20 respectively.

The flow control valve 19 uses, for example, a pulse motor as a drive source, and the opening degree is determined according to the number of pulses.

Next, the operation of the present embodiment will be described with reference to the time chart of FIG. 3 and the flowchart of FIG. In addition,
In the flowchart of FIG. 4, S1 to S12 indicate each step of the flowchart. For convenience of explanation, the rim automatic opening / closing valve 17 and the jet automatic opening / closing valve 20 are referred to as a rim valve and a jet valve, respectively.

Water supply amount data and water supply timing data at the time of large washing and small washing are preset in a memory 15c in the control device 15.

In the time chart shown in FIG. 3, in this embodiment, the pre-cleaning water supply amount from the rim water supply port 11a to the bowl portion 3 at the start of cleaning is set to a smaller flow rate during small cleaning than during large cleaning (see FIG. 4). (t1L> t1S), and the amount of jet water supplied after pre-washing is smaller for small washing than for large washing (t2L> t2S). Therefore, since the large amount of washing supplied to the trap drainage channel 4 differs between large and small washings, the duration of the siphon action differs. For this reason, the time (t3L, t3S in FIG. 4) from the time when the jet water supply is stopped to the time when the water supply for sealing the bowl portion 3 is started is different between the large and small washing. The amount of water supplied to the bowl portion 3 for sealing (t4 in FIG. 3) is the same for both large washing and small washing.

Next, the push button switch 16a for large cleaning of the operation unit 16
The operation will be described with reference to the flowchart of FIG.

In response to a start signal from the operation unit 16, the control device 15 controls the opening of the flow rate control valve 19 so that the pre-cleaning water reaches a predetermined instantaneous flow rate (S1), and further drives the rim valve 17 to the open state (S1).
2). Thereby, the washing water is supplied to the bowl portion 3 of the toilet 1. The supplied cleaning water generates a vortex in the bowl portion 3 and performs pre-cleaning of the bowl portion 3.

On the other hand, the microprocessor unit 15b includes the rim valve 1
Immediately after the opening of 7, the timer 15d is started, and after a predetermined time (for example, t1L) elapses (S3), the rim valve 17 is closed via the output interface circuit 15e (S3, S4).

Next, the control device 15 controls the opening of the flow control valve 19 so that the siphon water supply reaches a predetermined instantaneous flow rate (S5), and further drives the jet valve 20 to the open state (S6). As a result, the washing water is injected into the trap drainage channel 4 from the jet injection holes 12a of the jet nozzle 12. Therefore, the amount of the washing water flowing into the discharge passage 4b beyond the weir portion 4a of the trap drainage passage 4 increases, and the momentum of the washing water also increases.

The washing water that has passed over the weir portion 4a collides with the sprinkling step portions 53 provided on the inner wall of the discharge passage 4b, and changes the flow while discharging the discharge passage 4b.
Flows down substantially uniformly over the entire circumference of the pipe wall, and a water film is generated at the narrowed portion 4c. Due to the formation of the water film, the inside of the trap drainage channel 4 is cut off from the atmosphere, and as the cleaning water fills the upstream side of the water film portion, the air in the trap drainage channel 4 is drawn from the outlet 6 together with the cleaning water. Not drained to the drain side. For this reason, a negative pressure is generated in the trap drainage channel 4, the pool water 25 in the bowl portion 3 is drawn into the trap drainage channel 4, and the inside of the trap drainage channel 4 becomes a complete siphon state filled with washing water. Become.

Then, after opening the jet valve 20, the microprocessor unit 15b starts the timer 15d again, and after a predetermined time (for example, t2L) elapses (S7), the jet valve 20 is output via the output interface circuit 15e.
Is closed (S8).

Even if the jet of cleaning water from the jet nozzle 12 stops,
The siphon action continues until the level of the pool water 25 drops below the lower end 2a of the partition wall 2. During this time, the waste in the bowl portion 3 is discharged together with the accumulated water 25.

The controller 15 starts the timer 15d immediately after driving the jet valve 20 to the closed state in step S8, and after a predetermined time elapses (S9), the flow rate of the sealed water supply becomes a predetermined instantaneous flow rate. The opening of control valve 19 is controlled (S1
0) Further, the rim valve 17 is driven to the open state again (S11), and the rim valve is closed (S12) when a preset amount of water is supplied to the bowl portion 3.

 Thus, a series of water supply control shown in FIG. 4 is completed.

In the present embodiment, the jetting of the washing water is started from the jet nozzle 12 after the end of the pre-washing of the bowl portion. However, the jetting of the washing water may be performed during the pre-washing.

(Effects of the Invention) As described above, according to the present invention, since the flow rate of the water supply pipe is adjusted by the flow rate control valve, the washing can be surely performed with an appropriate amount of washing water.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a toilet provided with a flush water supply device according to the present invention, FIG. 2 is a block diagram of the water supply device, FIG. 3 is a time chart showing the operation of the water supply device of FIG. The figure is the same flowchart. In the drawings, 1 is a toilet bowl, 14 is a flush water supply device (water supply device), 15 is a control device serving as water supply control means, 17 is an automatic opening / closing valve for a rim, 19 is a flow control valve, and 20 is an automatic opening / closing valve for jet. Reference numeral 23 denotes a water supply pipe.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinji Shibata 2-8-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kiki Co., Ltd. No. 1 Inside the Toga Kikai Co., Ltd. Chigasaki Plant (56) References Japanese Utility Model Showa 53-23162 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E03D 5/10 E03D 3/00 E03D 11/02

Claims (1)

(57) [Claims] 1. An apparatus for branching a water supply pipe for supplying flush water to a toilet and supplying flush water to each part of the toilet, wherein a flow control valve is provided in the water supply pipe and each of the branch water supply pipes is automatically opened and closed. A flush water supply device for a toilet bowl, further comprising a valve, wherein a control device controls the flow rate control valve so as to have a preset opening degree and controls an opening time of the automatic opening / closing valve.