JPH0714465Y2 - Flush toilet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a flush toilet bowl, and more particularly to a flush toilet bowl that can efficiently generate a siphon action in a trap portion.

(Prior Art) In a flush toilet that uses a siphon action to wash the toilet, guide the drainage channel upward from the bottom of the bowl,
After that, it has a trap part that drains downward. Conventionally, the weir portion, which is a bent portion in which the drainage channel in the trap portion is inclined upward and then drooped, is formed by simply bending the tubular flow path.

(Problems to be solved by the invention) By the way, in a toilet equipped with a trap drainage channel, when a siphon action occurs, a water film is first generated near the discharge port, so that outside air enters the trap drainage channel. Then, the air in the trap drainage channel is discharged together with the wash water, and a negative pressure is generated in the trap drainage channel, so that the trap drainage channel is brought into the water passing state.

However, in such a conventional weir, the flowing water that has passed through the weir collides with the opposite wall, and although part is dispersed, the rest flows along the opposite wall almost as it is. It is difficult to generate a state, and thus it is difficult to efficiently generate an effective siphon action.

Therefore, an object of the present invention is to provide a flush toilet bowl that can effectively generate a water film state even with a small amount of flush water and efficiently generate a siphon action.

(Means for Solving the Problems) In order to solve the above problems, the present invention relates to a flush toilet bowl that connects a bowl portion through an inflow passage to a trap drainage passage,
It is characterized in that a projection portion smaller than the diameter of the trap drainage channel is provided at the inflow channel side central portion of the weir provided between the inflow channel and the trap drainage channel.

(Operation) By providing a projection smaller than the diameter of the trap drainage channel in the center of the weir section of the trap drainage channel on the inflow channel side, the running water flowing into the weir section flows around the projection and after passing through the weir channel. Can disperse along the pipe wall of the trap drainage channel and drop the drainage uniformly, and a stable water film state can be obtained with a small amount of water.

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

FIG. 1 is a vertical sectional view of a toilet bowl according to the present invention. The toilet bowl 1 has a bowl portion 3 partitioned by a partition wall 2 and a trap drainage channel 4. The trap drainage channel 4 connects an inflow port 5 opened in the lower part of the rear wall of the bowl part 3 and an outflow port 6 opened in the rear bottom surface of the toilet bowl 1 by bending them in a substantially inverted U shape. The trap drainage path 4 has a discharge path 4b formed in a substantially straight pipe shape on the downstream side of the weir portion 4a which is a bent portion, and has a narrowed portion 4c at the lower end of the discharge path 4b. The narrowed portion 4c is formed by reducing the inner diameter of the discharge passage 4b in the direction orthogonal to the pipe wall of the discharge passage 4b. The narrowed portion 4c does not necessarily have to be provided at the position of the drainage port 6 which is the lower end of the drainage channel 4c, and may be provided at, for example, a substantially intermediate portion of the discharge channel 4c or a position downstream of the intermediate portion.

In the trap drainage channel 4, a weir portion 4a is provided with a rectifying protrusion 4d. As shown in FIG. 2 and FIG. 3, the projection 4d circulates the water flowing to the weir 4a around the projection 4d, and as a result, the running water that has passed through the weir 4a. Is dispersed so as to flow evenly in the drainage channel wall 4b, and as a result, a stable water film state is produced even at a small flow rate, and a siphon action is efficiently caused.

Although the shape of the protrusion 4d is wide on the upstream side 4e in FIG. 3, the present invention is not limited to this shape and may be, for example, an elliptical shape.

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 edge of the bowl portion 3 so as to project inward of the bowl portion 3, and the bottom surface of the rim water passage 9 is formed. The water spray ports 10 are opened obliquely with respect to the bowl portion 3 at appropriate intervals. Further, the rim water passage 9 communicates with the rim water supply chamber 11 at the rear part.

A box 12 is provided at the upper rear part of the toilet 1, and a water supply control system 13 is housed in the box 12. The water supply control system 13 is a solenoid valve 14 that supplies water to the bowl portion 3 via the rim water passage 9.
And a control device 15 for opening and closing the same, an operation part 16 for giving a cleaning start input to the control device 15, and a flow meter 18 for measuring the amount of water supplied to the bowl part 3.

FIG. 4 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. The input interface 15a is connected with an operating unit 16 and flow meters 18, 19. The solenoid valve 14 is connected to the output interface circuit 15e through the water supply control line 14a.

The operation unit 16 includes a switch for starting the cleaning of the toilet 1, and the opening / closing of this switch is input to the control device 15 by the activation signal line 16a.

The operation unit 16 may be provided with a plurality of operation buttons so that the supply amount of wash water can be selected. Further, a switch or a sensor for detecting 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 seated state, or after the seated state is changed to the unseated state. Alternatively, the cleaning may be automatically started after a predetermined time.

As the flow meter 18, for example, an impeller type flow meter is used. This flow meter
Reference numeral 19 has a magnet attached to the impeller, which electromagnetically detects the rotation of the impeller and outputs an alternating electromotive voltage having a frequency proportional to the rotation of the impeller as a flow rate signal.

The flow rate signal input to the input interface circuit 15a by the flow rate signal line 18a is waveform-converted in the input interface circuit 15a, and is converted into a pulse signal having a predetermined amplitude and a predetermined pulse width proportional to the frequency of the flow rate signal, It is input to the microprocessor 15b.

The control device 15 concerned supplies a constant flow rate to the bowl part 3, and the microprocessor 15b opens the solenoid valve 14 by the activation signal of the operation part 16, and then the flow rate counted from the output signal of the flow rate sensor 18 is a predetermined value. Then, the solenoid valve 14 is closed.

(Effects of the Invention) As is clear from the above description, according to the present invention, since a projection smaller than the diameter of the trap drainage channel is provided at the center of the weir section of the trap drainage channel on the inflow channel side, running water flowing into the weir channel Flow around the protrusions, and after passing through the weir part, it can be dispersed along the pipe wall of the trap drainage channel to evenly drop the drainage, and a stable water film state can be easily obtained even with low water volume. As a result, the siphon action can be efficiently produced, and the cleaning effect can be enhanced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a toilet bowl showing a first embodiment of the present invention, FIG. 2 and FIG. 3 are operation explanatory views of projections, and FIG. 4 is a block configuration diagram of a control device. In the drawings, 1 is a toilet bowl, 4 is a trap drainage channel, 4a is a weir of the trap drainage channel, 4b is a drainage channel of the trap drainage channel, 4c is a narrowed portion provided in the trap drainage channel, and 4d is a protrusion. .

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noboru Niihara 2-8-1, Motomura, Chigasaki-shi, Kanagawa Tochi Kikai Co., Ltd. Chigasaki Plant (56) References: 62-21180 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A flush toilet which connects a bowl portion with an inflow passage to a trap drainage passage, wherein a weir portion provided between the inflow passage and the trap drainage passage has a central portion at an inflow passageway side, which is larger than a diameter of the trap drainage passage. A flush toilet bowl with a small protrusion.