JP2761257B2 - Toilet flush water supply - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flush water supply device for a toilet having a water supply path to both a trap section and a bowl section of the toilet.

(Prior Art) A washing water supply device for independently supplying water to a bowl portion and water to a trap drainage channel is known from Japanese Patent Publication No. 55-30092, and this device is an electromagnetic on-off valve for each water channel. Is provided to control the water supply.

(Problems to be Solved by the Invention) However, the supply of water to the bowl portion is divided into a portion for cleaning the wall surface of the bowl portion and a portion for generating swirling of the accumulated water, or the cleaning power is improved, or the supply of water to the trap drainage channel is siphoned. In the case where it is divided into a jet jet for generating the action and a shower jet for improving the conveying capacity of the waste, etc.,
If an on-off valve mechanism is provided for each water supply device, the size of the water supply device becomes large, and it becomes difficult to mount the cleaning device in the toilet.
Not only the drive timing of each valve becomes complicated, but also the power consumption increases.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention relates to a device for supplying water to a bowl portion and then to a trap drainage channel in flushing and supplying water to a toilet. An on-off valve connected to the on-off valve, a directional switching valve connected to the downstream side of the on-off valve to open the bowl side when not driven, and to open the trap drainage channel only when driven, and a cleaning start input. Control means for driving the on-off valve to be in an open state for a preset time and driving the direction switching valve at a preset timing.

(Operation) By providing the direction switching valve on the downstream side of the on-off valve, switching water supply to a large number of water supply paths can be performed with a small number of valves, and the device can be easily reduced in size and simplified.

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

FIG. 1 is a longitudinal sectional view of a toilet provided with a flush water supply device according to the present invention. In FIG. 1, reference numeral 1 denotes a siphon jet toilet, and the toilet 1 includes a bowl portion 3 partitioned by a partition 2 and a trap drainage channel 4. 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 has a substantially straight pipe-shaped drainage channel 4b downstream of the weir portion 4a, which is a bent portion, and has a throttle 4c at the lower end of the drainage channel 4b. The constricted portion 4c is obtained by reducing the inner diameter of the discharge passage 4b in a direction orthogonal to the pipe wall of the discharge passage 4b. The throttle 4c does not necessarily have to be provided at the position of the outlet 6 which is the lower end of the discharge path 4b.
It may be provided at a substantially middle portion of 4b or at a position downstream of the middle portion.

In the trap drainage channel 4, a large number of projections 4d are provided on the pipe wall downstream of the weir 4a. In the embodiment shown in FIG. 1, three projections 4d are formed by making the inner circumference of the tube wall make a full circumference at a predetermined interval. The projections 4d are arranged at predetermined intervals. However, as shown in FIG. 2, the phase of the position where the projections 4d...
4d, and the flow is changed so as to flow down uniformly over the entire circumference of the pipe wall of the discharge path 4b. As a result, the washing water is supplied to the throttle portion 4c substantially uniformly over the entire circumference, a stable water film state is generated even with a small flow rate, and the siphon action can be efficiently caused.

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.

The water supply device 14 includes a control device 15 as water supply control means, and push button switches 16a and 16b for large cleaning and small cleaning, and provides a cleaning start input to the control device 15 at the same time as a selection input of a cleaning water amount. An operation unit 16 as a washing water amount selection input means, a water supply valve mechanism 17 for opening and closing a water supply pipe, atmosphere release valves 18 and 21, and a direction switching valve 20 for switching water supply to a trap unit and a bowl unit.

The water supply valve mechanism 17 is, for example, an electromagnetic valve that opens when a predetermined voltage is applied. The valve mechanism 17 can withstand the hydrostatic pressure when the valve mechanism is closed, and is configured to prevent a large hydrostatic pressure from being applied to the direction switching valve 20.

A water supply pipe 20a is connected to the inflow port of the direction switching valve 20, and one of the outflow ports of the switching valve 20 is connected to a water supply port of the rim water supply chamber 11 through an atmosphere release valve 18 provided in the rim water supply passage 9a. Connect to 11a. The other outlet of the switching valve 20 is connected to a jet water supply port 12b of the jet nozzle 12 through an air release valve 21 and a jet water pipe 24 made of metal, synthetic resin, synthetic rubber, or the like. This jet conduit 24 is used for the water supply device 1
4 and the jet nozzle 12 are directly connected. The jet water pipe 24 is disposed along the rear lower surface of the bowl portion 3 so that the length of the jet water pipe 24 is shortened. It is connected to the jet water supply port 12b of the nozzle 12. When the direction switching valve 20 is not driven, it is opened toward the rim water passage 11, and only when driven, the jet water pipe is opened.

 FIG. 3 is a block diagram of the control device.

The control device 15 includes an input interface circuit 15a, a microprocessor (MPU) 15b, a memory 15c, a timer 15d, and an output interface circuit 15e. An operation unit 16 is connected to the input interface circuit 15a, and the output interface circuit 15e is connected to the input interface circuit 15a. Is a directional control valve via the water supply control line 20a.
20, the water supply valve mechanism 17 is connected.

The operation unit 16 is a stool 16 for starting the cleaning of the toilet 1.
a, a switch for urinal 16b is provided, and the opening and closing of this switch is input to the control device 15 via a start signal line 16c.

The operation unit 16 may be provided with a plurality of operation buttons so that the supply amount of the cleaning water can be selected. Further, a switch or a sensor for detecting the seating is provided, and these signals are input to the control device 15 to enable the operation of the operation unit 16 only in the seating state, or after the seating state is changed to the unseated state. Alternatively, the cleaning may be automatically started after a predetermined time.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. 4 and the time chart of FIG.

In the flowchart of FIG. 4, S1 to S7 indicate each step of the flowchart.

In response to the start signal from the operation unit 16, the control device 15 opens the valve mechanism (S1) and supplies the bowl 3 of the toilet 1 with flush water. 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 timer 15d is started immediately after the valve mechanism 17 is opened, and after a predetermined time elapses, the direction switching valve 20 is driven via the output interface circuit 15e to switch the water supply from the rim to the jet nozzle (S2, S3).

As a result, the washing water is jetted from the jet nozzle 12 into the trap drainage channel 4, and the jetted washing water fills the drainage channel 4, while the air in the drainage channel 4 is swirled through the outlet 6. Since the air is exhausted to a drain pipe (not shown) connected to the outlet, a negative pressure is generated in the drain passage 4 and gradually increases. Due to this negative pressure, the pool water 25
Is sucked into the outflow port 6 side beyond the weir portion 4a of the trap drainage channel 4, and the siphon action is generated in a short time from the jet fountain because the negative pressure further increases.

After opening the jet nozzle side, the microprocessor unit 15b starts the timer 15d again, stops driving the direction switching valve after a predetermined time elapses, switches to the rim side (S4, S5), and performs control. Device 15
Starts the timer 15d immediately. When a predetermined time for water sealing set in advance elapses, the valve mechanism 17
Is driven to the closed state (S6, S7).

Thereby, a series of water supply control shown in the time chart of FIG. 5 is completed.

In the present embodiment, based on the output signal of the operation unit 16, the time setting value of the flush water amount for the stool, the rim for the urine, and the jet is changed in advance, so that the water supply amount for the stool and the urine is changed. I am trying to change it.

As described above, the present embodiment has described the example in which the water supply to the jet nozzle is controlled as an example of water supply to the trap drainage channel. However, the present invention is not limited to such a jet nozzle, and as shown in FIG. 6, for example. Instead of a simple jet nozzle, a shower 7 may be provided to control the water supply to the shower 7.

In addition, the shower 7 is provided in the trap drainage channel on the downstream side by the weir portion of the trap drainage channel 4, and the inside of the trap drainage channel is set to a negative pressure by spraying water from this shower,
With this negative pressure, flush water is drawn into the bowl part of the toilet bowl in the trap drainage channel, and siphon action is easily caused to enhance the flushing effect. The directional control valve is not limited to the directional control valve. For example, the directional control valve is a three-way control valve that opens when the bowl portion is not driven, and combines both jet water supply and shower water supply as shown in FIG. 30, the jet water 31 and the shower water 32 are respectively connected to the three-way switching valve 33.
The control may be performed by using. Furthermore, in the present embodiment, the on-off valve is an electromagnetic valve, but a ball tap, a flash valve, or the like may be used.

(Effect of the Invention) As described above, the cleaning water supply device according to the present invention
By providing the direction switching valve on the downstream side of the on-off valve, switching water supply to a large number of water supply paths can be performed with a small number of valves, and the device can be reduced in size and simplified. Therefore, mounting of the cleaning device in the toilet is also facilitated. Further, since the direction switching valve is provided to open the bowl portion side of the toilet which should be opened first when the toilet is not driven, the configuration of the drive timing is simplified, and the drive power can be reduced. Furthermore, since the hydrostatic pressure can be prevented from directly acting on the direction switching valve by the on-off valve,
The pressure-resistant design of the directional control valve becomes easy, and the above-mentioned effects of miniaturization and simplification of the device can be obtained.

[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 sectional view taken along line II-II of FIG. 1, FIG. 3 is a block diagram of the water supply device, and FIG. FIG. 5 is a time chart showing the operation of the water supply device of FIG. 3,
FIG. 6 is a longitudinal sectional view of a toilet showing a toilet according to another embodiment of the present invention, and FIG. 7 is a view showing another embodiment of a water supply system. In the drawings, 1 is a toilet bowl, 3 is a bowl portion, 4 is a trap drainage channel, 9 is a rim water channel, 11a is a rim water inlet, 12 is a jet nozzle, 12b is a jet water inlet, and 14 is a flush water supply device. (Water supply device), 15 is a control device as water supply control means, 16
Denotes an operation unit, 17 denotes a water supply valve mechanism (open / close valve), 20 denotes a direction switching valve, and 33 denotes a three-way switching valve (direction switching valve).

──────────────────────────────────────────────────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 Tochiki Kikai Co., Ltd. Chigasaki Plant (56) References JP-A-50-55146 (JP, A) JP-A-63-27580 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , (DB name) E03D 5/10 E03D 3/00 E03D 11/02

Claims (1)

(57) [Claims] 1. A device for supplying water to a bowl portion after supplying water to a bowl portion at the time of flush water supply to a toilet bowl, the device comprising an on-off valve connected to a water supply pipe and a downstream side of the on-off valve. And a direction switching valve that opens the bowl portion side when not driven and opens the trap drainage channel side only when driven, and drives the open / close valve to be open for a preset time based on the washing start input. And control means for driving the direction switching valve at a preset timing.