JPH0390753A - Flush toilet bowl and washing method therefor - Google Patents

Abstract

PURPOSE:To improve capacity of conveying dirt by providing a nozzle for jetting washing water and a nozzle for jetting showering water on an inlet of a trap riser tube forming a water supply channel for the trap. CONSTITUTION:A toilet bowl composed of a bowl part 3 with water-jetting ports 9 provided on a rim thereof and a trap drain passage 4 in an upside-down U shape with a nozzle 11 for jetting water directing toward an inflow port 5 and a nozzle 12 for shower water installed thereat is provided. A valve 17 for supply of water to the rim and a valve 20 for supply of jetting water are connected to a water supply pipe 25 and after this, the valve 17 is connected to a water supply chamber 10 through a flow meter 19 and the valve 20 is connected to the nozzle 11 and 12 through the flow meter 22 and a two-way selector valve 23. In conformity with preset supply rate predetermined with a control device 15, primary washing is made, with an operating member 16 started, by operation of the valve 17 and after this, jetting and showering are made in order by operation of the valves 20 and 23, and water seal is made afterward with water supplied by operation of the valve 17. Thereby residual and suspended dirt can be completely discharged even with low pressured water supply.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a siphon-jet type flushing toilet bowl that injects flushing water into a trap drainage channel to forcibly cause a siphon action, and a flushing method thereof.

(Prior Art) As shown in FIG. 10, a jet nozzle 100 of a conventional siphon jet toilet has an injection hole 10 with a diameter of about 81.
It had one 1. The cleaning water injected from the injection hole 101 flows approximately in the center of the trap drainage channel rising pipe 102 as a jet stream as shown by the arrow in FIG. 10, and causes a siphon effect in the trap drainage channel in a short period of time.

(Problem to be Solved by the Invention) However, the ability of the jet stream to transport waste is not sufficient, and the waste 104 may remain at the bottom of the bowl portion 103 of the toilet, or floating waste with a light specific gravity may not be transported. There is.

The present invention was made to solve these problems, and its purpose is to improve the ability to transport waste without reducing the ability to generate a siphon effect.

<Means for Solving Problem Li1) In order to solve the above-mentioned problems, the flush toilet according to the present invention is provided with a shower nozzle at the bottom of the bowl portion that sprays cleansing water in a shower-like manner toward the rising pipe of the trap drainage channel. It is characterized by being provided separately from the jet nozzle.

Note that it is desirable to provide separate water supply ports for the shower nozzle and jet nozzle.

Further, the cleaning method according to the present invention is characterized in that the cleaning water is supplied to the jet nozzle to generate a siphon effect in the trap drainage channel, and then the water is supplied to the shower nozzle.

In addition, from the point of view of saving water, it is desirable to supply water to the shower nozzle just before the siphon action ends.

(Function) A siphon effect is generated in the trap drainage channel by supplying cleaning water to the jet nozzle.

Thereafter, by supplying water to the shower nozzle, the dirt at the bottom of the bowl and the floating dirt in the bowl are transported toward the trap drainage channel.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a toilet bowl according to the present invention.

In the figure, 1 is a siphon jet type toilet bowl, and the toilet bowl 1 is divided by a partition wall 2 into a bowl part 3 and a trap drainage channel 4.
has. The trap drainage channel 4 connects an inlet 5 opened at the lower part of the rear wall of the bowl 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.

A rim water passageway 8 is formed in an annular shape on the rim part 7 at the upper edge of the bowl part 3 so as to protrude inward of the bowl part 3, and rim water injection ports 9 are provided at appropriate intervals on the bottom surface of the rim water passageway 8. It is opened diagonally with respect to the bowl part 3. Further, the rim water passage communicates with the rim water supply chamber 10 at the rear.

A single-hole jet nozzle 11 and a shower nozzle 12 having a plurality of injection holes are provided at the bottom of the bowl portion 3. Note that the jet nozzle 11 and the shower nozzle 12 may be formed integrally with the toilet bowl 1, or separate nozzles if and 12 may be attached to the bottom of the bowl portion 3 in a watertight manner with an adhesive or the like. It may also be a structure in which it is worn.

A box 13 is provided at the rear upper part of the toilet bowl 1, and a water supply device 14 is housed in this box 13. The water supply device 14 includes a control device, an operating section 16 that provides human power to start cleaning to the control device 15, a rim valve mechanism 17 that controls water supply to the bowl section 3, an atmosphere release valve 18, a rim flow meter 19, and ,
A jet valve mechanism 20 that controls water supply to the jet nozzle 11 and the shower nozzle 12, and an atmosphere release valve 21
, jet flowmeter 22 and jet nozzle 11
and a two-way switching valve mechanism 23 that switches the water supply to the shower nozzle 12.

The upstream sides of the rim valve mechanism 17 and the jet valve mechanism 20 are connected to a water supply pipe 25 via a pipe joint 24 . On the downstream side of the rim valve mechanism 17, there is an atmosphere release valve 18 and a rim flow meter 19.
It is connected to the rim water supply port 10a of the rim water passage chamber 10 via.

The downstream side of the jet valve mechanism 20 is connected to one end of a jet water conduit 26 via an atmosphere release valve 21 and a jet flow meter 22. This jet water guide pipe 26 is made of metal, synthetic resin, or synthetic rubber, and is used to directly guide water to the two-way switching valve 23 provided at the bottom of the bowl part 3. It is arranged along the rear lower surface of the bowl part 3 so that it is short. Jet water pipe 26
The downstream side thereof is connected to the inlet 23a of the two-way switching valve mechanism 23. The first outlet 23b of the two-way switching valve 23 is connected to the water supply port 11a of the jet nozzle 11, and the second outlet 23c is connected to the water supply port 12a of the shower nozzle 12.

FIG. 2 is an explanatory diagram showing the cleaning water jetting state of the jet nozzle and the shower nozzle, and FIG. 3 is a layout diagram of the jet nozzles.

The injection hole 11b of the jet nozzle 11 is oriented approximately toward the center of the trap riser pipe 4a, and when water is supplied to the jet nozzle 11, the cleaning water flows as a jet stream as shown by arrow A in FIG. .

A cleaning water injection hole surface 12b of the shower nozzle 12 is formed along the bottom shape of the bowl portion 3, and a plurality of shower injection holes 12c are provided thereon. Multiple injection holes 12
c... are distributed so as to inject over a wide range within the trap riser pipe 4a. In addition, injection ports 12c are provided so that when water is supplied to the shower nozzle 12, cleaning water is sprayed from the inlet 5 toward the inside of the trap drain channel 4 as shown by arrow B in FIG. are doing.

FIG. 3 shows an example of the arrangement of the injection holes, and in this example, the diameter is 8.
A plurality of shower injection holes 12c are arranged on concentric circles with a diameter of about 15 mm and a diameter of about 30 mm, centering on a jet injection hole fib of approximately AON size.

FIG. 4 is a block diagram of the water supply device.

The control device 15 includes an input interface circuit 1581, a microprocessor (hereinafter referred to as MPU) 15b, and a memory 1.
It is composed of a 5c1 timer 15d and an output interface circuit 15e, and the input interface circuit 15a includes an operating section 16 and flowmeters 19 and 22 for rim and jet.
are connected to the output interface circuit 15e, and a rim and jet valve mechanism 17.20 and a two-way switching valve mechanism 23 are connected to the output interface circuit 15e.

The operation unit 16 is equipped with a switch for starting flushing of the toilet bowl 1, and the opening and closing of this switch is controlled by the activation signal line 16.
a is input to the control device 15. Note that the operation section 16
may be provided with a plurality of operation buttons so that the amount of cleaning water to be supplied 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 the operation of the operating section 16 only when the seat is seated, or when the seat changes from the seat to the non-seating state and then a predetermined operation is performed. It may be configured to automatically start cleaning after a certain period of time.

For example, a blade wheel type flow meter can be used as the rim flow meter and jet flow meter 19.22. This flow meter 1
9.22 has a magnet attached to the impeller, electromagnetically 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. In addition, flow meter 1
9.22 may use an electromagnetic flow meter or the like in addition to the impeller type.

Flow signal line! The flow rate signal inputted to the input interface circuit 15a by the flow rate signals 9a and 22a is waveform-converted within the input interface circuit 15a, and converted into a pulse signal with a predetermined amplitude and a predetermined pulse width proportional to the frequency of the flow rate signal, and then sent to the MPU 15b. is input.

The rim and jet valve mechanisms 17, 20 are composed of, for example, electromagnetic valves that open when a predetermined voltage is applied. The two-way switching valve mechanism 23 uses an electromagnetic switching valve that can electrically switch the flow path, and in this embodiment, when no voltage is applied, the inlet 23a and the first outlet 23b are in communication, and the voltage A valve is used that switches the flow rate to the second outlet 23c when .degree. is applied. 17a, 20a, 23d are each valve mechanism 17°20.23
This is a signal line for driving each.

Next, the operation of this embodiment will be explained with reference to the time chart of FIG. 5 and the flow chart of FIG. 6. In addition, in FIG. 6, S1 to S7 indicate each step of the flowchart. Further, for convenience of explanation, each valve mechanism will be referred to as a rim valve, a jet valve, and a two-way valve.

The control device 15 drives the rim valve 16 to an open state in response to a start signal from the operating section 16 (Sl).

As a result, cleaning water is supplied from the rim water injection port 9 to the bowl portion 3. The supplied washing water generates a vortex in the accumulated water 27 in the bowl part 3, and the bowl part 3 is pre-washed.

The MPU 15b calculates the integrated flow value or the instantaneous flow rate by counting the pulse signal obtained by shaping the flow rate signal of the rim flow meter 19, and when the integrated flow value or the instantaneous flow rate matches the bowl pre-cleaning water amount set in advance in the memory 15c, The rim valve 17 is closed via the output interface circuit 15e (S
2). Note that, without performing flow control, for example, the timer 15d
The rim valve 17 may be opened when the pre-cleaning time set in advance has elapsed.

Next, the control device 15 drives the jet valve 20 to an open state (S3). As a result, the cleaning water flows through the jet water conduit 26 □ the inlet 23 a of the two-way valve 23 □ the first outlet 23
b□Washing water is supplied to the jet nozzle 11, and is injected into the trap rising pipe 4a. Therefore, the amount of wash water flowing into the drain channel 4C over the base 4b of the trap drain channel 4 increases, the force of the wash water also increases, and the air in the trap drain channel 4 flows out from the outlet 6 along with the wash water as shown in the figure. It is discharged to the drain pipe side. Therefore, negative pressure is generated in the trap drainage channel 4, and the accumulated water 27 in the bowl part 3 is drawn into the trap drainage channel 4, creating a complete siphon state in which the trap drainage channel 4 is filled with washing water. Become.

The MPU 15b integrates the flow rate based on the flow rate signal from the jet flow meter 22, and when the amount of water supplied to the jet nozzle preset in the memory 15c is supplied, the MPU 15b controls the two-way valve 23 so that the cleaning water is supplied to the shower. It is switched so that it is supplied to the nozzle 12 (S4). Thereby, the cleaning water is sprayed from the plurality of injection holes 12a of the shower nozzle 12.

The siphon action continues until the water level of the stored water 27 drops below the lower end 2a of the partition wall 2 and air flows into the trap drainage channel 4.
During this period, most of the dirt in the bowl portion 3 is discharged together with the stored water 27. Even if the siphon action stops,
The washing water jet from the shower nozzle 12 continues, and dirt remaining at the bottom of the bowl portion 3 and floating dirt are discharged by a shower-like jet stream.

After driving the jet valve 20 to the open state in step S3, the MPU 15b immediately starts the timer 15d, and stops energizing the jet valve 20 and the two-way valve 23 when the preset main cleaning time has elapsed. . As a result, the jet valve 20 is closed, and the injection of cleaning water from the shower nozzle 12 is stopped (S5). It should be noted that the jet valve 20 and the two-way valve 23 may be de-energized when a preset shower nozzle water supply amount based on the flow rate signal of the jet flow meter 22 is supplied.

Next, the control device 15 drives the rim valve 17 to the open state again (S6), and at the time when the preset amount of sealing water is supplied to the bowl part 3, or for the sealing water supply time preset in the timer 14d. When the time period elapses, the rim valve 17 is closed (S7).

The series of cleaning water supply shown in FIG. 5 is thus completed.

In this embodiment, after the cleaning water is injected from the jet nozzle 11 to generate a siphon effect, the water is immediately injected from the shower nozzle 12. A cleaning method may also be used in which the valve 20 is closed and the jet valve is opened again just before the end of the siphon action to supply cleaning water to the shower nozzle.

7 to 9 are cross-sectional views of the bottom of the bowl of a toilet bowl showing other embodiments of the present invention.

7 shows a pipe wall of the trap rising pipe 4a (with a jet nozzle 11 provided therein, FIG. 8 shows a pipe wall with a jet nozzle 11 provided on the front side of the bottom of the bowl portion 3, and FIG. The positions of the jet nozzle 11 and the shower nozzle 12 shown in the figure are swapped.

(Effects of the Invention) As explained above, since the toilet bowl and cleaning method according to the present invention are equipped with two nozzles, one for jet and one for shower, a small flow of flushing water is produced by a strong jet stream from the jet nozzle. A siphon effect can be generated, and the shower jet from the shower nozzle can push floating dirt etc. into the trap drainage channel and completely drain it.

In addition, since each jet and shower nozzle has a water supply port, it is possible to supply cleaning water to each nozzle individually, and even when the water supply pressure is relatively low, it has the ability to generate a siphon effect and push in floating dirt. capacity can be secured.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of the toilet bowl according to the present invention, Fig. 2 is an explanatory diagram showing the cleaning water injection state of the jet nozzle and the shower nozzle, Fig. 3 is a layout of the injection holes, and Fig. 4 is the water supply. A block configuration diagram of the device, FIG. 5 is a time chart showing the operation of the water supply device, FIG. 6 is a flowchart of the same, and FIGS. 7 to 9 are longitudinal sections of the bottom of the toilet bowl showing other embodiments of the present invention. 10 are explanatory diagrams showing the structure and operation of a jet nozzle of a conventional siphon jet toilet. In addition, in the drawing, 1 is a toilet bowl, 3 is a bowl part, 4 is a trap drainage channel, 4a is a rise pipe of a trap drainage channel, 5 is an inlet of a trap drainage channel, 11 is a jet nozzle, and 11a is a jet nozzle. Water supply port, flb is the injection hole of the jet nozzle, 12 is the shower nozzle, 12a is the water supply port of the shower nozzle, 12c is the injection hole of the shower nozzle,
14 is a water supply device, 15 is a control device, 17 is a rim valve mechanism, 20 is a jet valve mechanism, 23 is a two-way switching valve mechanism,
25 is a water supply pipe. Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. □ Fig. 6 Fig. 7 Fig. 9 Fig. 10

Claims (4)

[Claims] (1) A jet nozzle that supplies cleaning water into the trap drainage channel to generate a siphon effect, and a shower nozzle that sprays cleaning water in a shower form from the bottom of the bowl toward the rising pipe of the trap drainage channel. A flush toilet bowl characterized by: (2) The flush toilet bowl according to claim 1, wherein the water supply port of the jet nozzle and the water supply port of the shower nozzle are provided separately. (3) A method for cleaning a flush toilet bowl, which comprises supplying flush water to a jet nozzle to generate a siphon effect in a trap drainage channel, and then supplying water to a shower nozzle. (4) The method for cleaning a flush toilet according to claim 3, characterized in that water is supplied to the shower nozzle slightly before the siphon action of the trap drainage channel ends.