JPH02161026A - Water closet - Google Patents

Abstract

PURPOSE:To make siphonage effectively and to save washing water by arranging water jetting holes on a pipe wall in the vicinity of an exit of a trap drainage canal along the circumferential direction of the pipe wall, and jetting washing water to the inside of the trap drainage canal. CONSTITUTION:A plurality of water jetting holes 7f are arranged on a pipe wall in the vicinity of an exit 6 of a trap drainage canal 4 in a closet 1 along the circumferential direction of the pipe wall. At the beginning of washing the closet 1, washing water is jetted to the inside of the trap drainage canal 4 from the water jetting holes 7f, and a water seal is formed to prevent the air from getting into the trap drainage canal 4 by the water film. After that, the washing water supplied from an inlet of the trap drainage canal 4 fills the trap drainage canal 4 within a short time, and the air in the trap drainage canal 4 is exhausted to make siphonage.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flush toilet, and more particularly to a flush toilet that can efficiently generate a siphon action in a trap drainage channel.

(Prior art) In the process of siphoning in a toilet bowl equipped with a trap drain, first a water seal is generated near the outlet, which prevents outside air from entering the trap drain. The air in the trap drainage channel is discharged together with the wash water, and negative pressure is generated in the trap drainage channel, which causes water to flow.

A water seal is generated in the trap drainage channel by the volume and force of the flushing water supplied from the bowl in conventional siphon toilets and the bowl and jet outlet in siphon jet toilets.

In addition, in order to make wood seals more likely to occur, the shape of the trap drainage channel may be complicatedly bent, or the trap drainage channel may have an enlarged diameter section.
A reduced diameter portion is provided (see Japanese Patent Laid-Open No. 62-3882).

(Problem to be solved by the invention) However, the force of the washing water flowing in the trap drainage channel is weak for a while after the washing water is supplied, and the water seal cannot be sufficiently generated, so it takes time for the siphon effect to occur. The washing water that leaked out was wasted water that was not involved in transporting waste, etc.

In addition, if the shape of the trap drainage channel is complicated, it becomes difficult to manufacture the toilet bowl, and the conditions for the siphon effect differ depending on the volume and shape of the bowl of the toilet bowl, so the shape of the trap drainage channel cannot be standardized and the design is difficult This required a large amount of man-hours.

The present invention has been made to solve these problems, and its purpose is to provide a flush toilet that can efficiently generate a siphon action and flush with a small amount of water.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides water injection holes in the pipe wall near the outlet of the trap drainage channel in the circumferential direction of the pipe wall for injecting cleaning water into the trap drainage channel. It is characterized by being arranged along the

(Function) When the toilet starts flushing, the water injection hole injects cleaning water into the trap drain, forming a water seal inside the trap drain, and this water film prevents outside air from entering the trap drain. be done. Therefore, the wash water supplied from the inlet of the trap drainage channel fills the trap drainage channel in a short time, and the air in the trap drainage channel is discharged, causing a siphon effect.

(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 according to the present invention.

In the figure, reference numeral 1 is a Sipon 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 part 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. The discharge passage 4b on the downstream side of the neck portion 4a of the passage 4 is formed into a substantially straight pipe shape, and an annular water film generating mechanism 7 is provided on the outlet 6 side of the discharge passage 4b.

A rim water 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 rim water injection ports 10 are formed at appropriate intervals on the bottom surface of the rim water passageway 9. It is opened diagonally to the bowl part 3. Further, the rim water passage 9 communicates with a rim water supply chamber 11 at the rear.

A jet nozzle 12 is attached to the bottom of the bowl part 3, and a jet injection hole 12a of the jet nozzle 12 is oriented toward the inlet 5 of the trap drainage channel 4.

A box 13 is provided at the rear upper part of the toilet bowl 1, and a water supply control system 14 is housed within this box 13. The water supply control system 14 includes a control device 15, an operation unit 16 that provides a cleaning start input to the control device 15, a pressure sensor 18 that detects the water supply pressure of the water supply pipe 17, and a rim/water film/jet valve mechanism 19. ，
It consists of 20.21.

One end of the rim valve mechanism 19 is connected to the water supply pipe 17, and the other end is connected to the rim water supply port 11a of the rim water passage chamber 11.

One end of the water film valve mechanism 20 is connected to the water supply pipe 17, and the other end is connected to the water film water supply lower a of the water film generation mechanism 7 via a water film supply path 22 made of metal such as a steel pipe or synthetic resin. do.

One end of the jet valve mechanism 21 is connected to the water supply pipe 17, and the other end is connected to the jet water supply port 12b of the jet nozzle 12 via a jet supply path 23 made of metal, synthetic resin, synthetic rubber, or the like.

The water film generating mechanism 7 seals the upper and lower ends of an inner tube 7b having the same inner diameter as the discharge channel 4b of the trap drainage channel 4 and an outer tube 7C having an inner diameter larger than the outer diameter of the inner tube 7b. A water supply chamber 7d is formed between the water supply chambers 7C and 7C, and includes a water film water supply lower a communicated with the water supply chamber 7d and a connecting portion 7e with the downstream end of the trap drainage channel 4. In the inner tube 7b, water injection holes 7f are bored at appropriate intervals around the entire circumference in a direction substantially perpendicular to the tube wall (see FIG. 2).

Note that the trap drainage channel 4 and the water film generating mechanism 7 are connected in a watertight and airtight manner by an adhesive or the like.

In addition, the water film supply channel 22 is connected to the neck portion 4a of the trap drainage channel 4.
The reason why the trap is folded lower and upper is to prevent odor, etc. in the trap drainage channel 4 from leaking through the water film supply channel 22 by sealing water in the lower folded section.

Next, the configuration of the water supply control system will be explained with reference to the block diagram shown in FIG.

The control device 15 includes a human power interface circuit 1581 and a microprocessor (MPU) 15b.

Consisting of a memory 15C, a timer 15d, and an output interface circuit 15e, the input interface 15a includes:
The operating unit 16 and the pressure sensor 18 are connected, and the output interface circuit 15e is connected to valve mechanisms 19, 20, 21 for the rim, water film, and jet.

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 unit 16 may be provided with a plurality of operation buttons so that the supply amount of cleaning water 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 operation of the operating section 16 only when the user is seated, or after changing from the seated state to the non-seated state. , the cleaning may be started automatically after a predetermined period of time.

The pressure sensor 18 uses a semiconductor or piezoelectric ceramic type pressure sensor. The output signal of the pressure sensor 18 is input via the pressure signal line 18a to A- in the ink face 15a.
The signal is input to a D converter and converted into a digital signal corresponding to the water supply pressure.

Valve mechanisms for rim, water film, and jet 1920.21
is composed of, for example, a solenoid valve, which opens when a predetermined voltage is applied. 19a, 20
a and 21a are signal lines that drive each valve mechanism 19, 20, and 21, 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. In addition, in the flowchart of FIG. 5, 81 to S6 indicate each step of the flowchart. Also, for convenience of explanation, a rim valve mechanism 19, a water film valve mechanism 20, a jet valve mechanism 21,
are referred to as the rim valve, water film valve, and jet valve, respectively.

In response to the activation signal from the operation unit 16, the control device 15 opens the rim valve 19 and the water film valve 20 (Sl).

As a result, flush water is supplied to the bowl part 3 of the toilet bowl 1,
A vortex is generated in the bowl part 3 to perform pre-cleaning of the bowl part 3. At the same time, the cleaning water in the water supply pipe 17 is supplied to the water film generating mechanism 7, and the cleaning water is injected into the inner pipe 7b through the water injection hole 7f, thereby creating a water seal in this portion.

The control device 15 performs control to supply a predetermined amount of water by varying the valve opening time based on the water supply pressure of the water supply pipe 17. For this reason, valve opening time data corresponding to various water supply pressures is registered in advance in the memory 15c.

Next, the control device 15 closes the rim valve 19 and drives the jet valve 21 to open (S2).

As a result, the pre-cleaning of the bowl portion 3 is completed, and cleaning water is injected into the trap drainage channel 4 from the jet injection hole 12a of the jet nozzle 12. The cleaning water sprayed into the trap drainage channel 4 flows over the base 4a and into the discharge channel 4b, and the water level at the water seal part of the water film generation mechanism 7 rises rapidly, causing the air in the trap drainage channel 4 to is the outflow port 6 along with the cleaning water.
from there to a drain pipe (not shown). Therefore, negative pressure is generated in the trap drainage channel 4, and the accumulated water 2 in the bowl part 3
3 is drawn into the trap drainage channel 4, and the trap drainage channel 4 is filled with wash water, creating a complete siphon state.

The control device 15 reads valve opening time data corresponding to the water supply pressure from a plurality of data in the memory 15c, and when the jet valve 21 remains open for a predetermined period of time, the jet valve 21 is closed. In addition to driving, the water film valve 20
is driven to the closed state (S3).

Next, the control device 15 starts the timer 15d (S4)
. This timer 15d is set with a time period from when the jet valve 21 is closed to stop the supply of cleaning water until the accumulated water 23 in the bowl portion 3 is discharged.

On the other hand, even if the jet valve 21 and the water film valve 20 are closed, the siphon action within the trap drainage channel 4 continues, and the filth and the like within the bowl portion 3 are discharged together with the standing water 23.

After a predetermined time period set by the timer 15d has elapsed (S4), the control device 15 drives the rim valve 19 to the open state again (S5). As a result, water sealing of the bowl portion 3 is started. Next, the control device 15 drives the rim valve 19 to the closed state after a period of time corresponding to the water supply pressure has elapsed (S6).

In the above steps 81 to S6, a series of cleaning water supplies shown in the time chart of FIG. 4 are completed.

Although the present embodiment is a siphon jet toilet with a small number of jet nozzles, the present invention can be applied to other flush toilets such as siphon toilets.

Alternatively, the water supply amount may be controlled by providing a flow meter downstream of each valve mechanism and supplying a predetermined water supply amount based on the flow rate, without using a pressure sensor.

Further, the water injection hole of the water film generating mechanism 7 may be a slit that is open over the entire circumference of the inner tube 7b.

Roughly speaking, the supply of cleaning water to the water film generating mechanism 7 may not be performed at the same time as the pre-cleaning, but may be at the same time as the supply of cleaning water to the jet nozzle, or at a timing before or after that. The timing of stopping the supply of cleaning water to the water film generator 7 may be after the occurrence of the siphon action, and there is no need to stop the supply of water to the jet valve at the same time.

(Effects of the Invention) As explained above, the flush toilet according to the present invention has a water injection hole near the outlet of the trap drainage channel, and when flushing the toilet, flush water is sprayed from the water injection hole to force a water seal. Therefore, the inside of the trap drainage channel is filled with the cleaning water within a short time after the cleaning water is supplied. For this reason,
It has the effect of being able to generate a siphon effect with a small amount of water and shortening the time until the siphon occurs.

Furthermore, since a water injection hole for forcibly generating a water seal is provided, the structure of the trap drainage channel, which has conventionally had a complicated shape, can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the toilet bowl according to the present invention, Fig. 2 is a horizontal sectional view of the water film generation mechanism of the toilet bowl, Fig. 3 is a block diagram of the water supply control system, and Fig. 4 is a diagram of the water supply control system. A time chart explaining the operation, and FIG. 5 is a flowchart of the same. In the drawings, 1 is a toilet bowl, 3 is a bowl part, 4 is a trap drainage channel, 6 is an outlet of the trap drainage channel, 7 is a water film generation mechanism, 7a is a water film water supply port, 7f is a water injection hole, and 15 is a water injection hole. Control device,
19 is a rim valve mechanism, 20 is a water film valve mechanism, 21 is a jet valve mechanism, and 22 is a water film supply path. Patent applicant Totokiki Co., Ltd. Agent Patent attorney 2 1) Toyo Part

Claims (1)

[Claims] A toilet bowl equipped with a trap drainage channel, characterized in that a water injection hole for injecting flushing water into the trap drainage channel is arranged along the circumferential direction of the pipe wall near the outlet of the trap drainage channel. flush toilet.