JPH0220739A - Flush toilet - Google Patents

Abstract

PURPOSE:To make improvements in a washing effect by detecting pressure in a trap part and when it is reached to the specified value, opening an on-off valve, in a toilet stool which constitutes wash to be exhausted by causing its siphonage in the trap part. CONSTITUTION:Wash water fed to a bowl part 1a of a toilet stool 1 from a wash water feeding means 9 is constituted to cause its siphonage in a trap part 1c and to be exhausted out of an exhaust pipe 2. Under this constitution, in this exhaust pipe 2, there is provided with a control valve 4 which performs the opening or closing this exhaust pipe, and a pressure sensor 10 is installed in a proper spot of the trap part 1c. Then, a signal out of the pressure sensor 10 is led into a control means 8, and when pressure in the trap part 1c is reached to the specified value, the control means 8 controls the control valve 4 for its opening, making it perform drainage. With this constitution, siphonage is made causable so effectively with a small quantity of wash water.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flush toilet that cleans the inside of the bowl portion of the toilet bowl using supplied flush water.

(Prior Art) For example, flush toilets are well known in which, after using the toilet, flush water is supplied to the toilet bowl by operating a flush valve or the like.

In such a flush toilet, the flushing water causes a siphon action in a trap section provided in the toilet bowl, thereby increasing its discharge power and enhancing the cleaning effect within the bowl section.

(Problem to be Solved by the Invention) In order to cause the siphon action, at least the drainage channel section from the trap section to a part of the drain pipe must be filled with water or communicated with water. However, with such conventional flush toilets, the flush water can be drained away through the drain pipe even before the drain channel is filled with water, so when supplying the flush water, In this case, it is necessary to supply washing water in an amount that far exceeds the amount of water discharged, and therefore there is a problem that the amount of washing water used increases.

(Means for Solving the Problems) In order to solve the conventional problems, the present invention provides a system in which the wash water supplied into the bowl part a of the toilet bowl 1 by the wash water supply means 9 is subjected to a siphon action in the trap part 1c. In a flush toilet that discharges water from a drain pipe 2 by raising the toilet, a control valve 4 for opening and closing the drain pipe 2 is provided in the drain pipe 2, and a control valve 4 for opening and closing the drain pipe 2 is provided at an appropriate position in the trap section to detect the pressure at the position. A pressure sensor 10 is provided, and when cleaning starts, the control valve 4 is closed to supply cleaning water, and the pressure sensor 1
A control means 8 is provided which opens the control valve 4 and drains water when the pressure at the position based on the zero output signal reaches a predetermined value.

(Function) According to such a configuration, water will not be discharged from the trap part to the drain pipe until the water necessary to cause the siphon action is collected in the trap part, and therefore a small amount of water will not be discharged from the trap part to the drain pipe. The amount of water can effectively create a siphon effect.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a configuration diagram showing a flush toilet according to an embodiment of the present invention.

In the figure, 1 is a toilet bowl, 2 is a drain pipe, and 3 is a water supply pipe. The toilet bowl 1 has a double structure at the upper end of the bowl portion 1a, and a water passage portion 1b is formed to guide flush water supplied from the water supply pipe 3 into the bowl portion. Further, a trap portion 1c is formed on the side of the ball portion 1a to once guide the cleaning water upward from the bottom of the ball portion 1a. A pressure sensor 10 according to the present invention is provided at the upper end, and a regulating valve 4 according to the present invention is provided between the trap portion 1c and the drain pipe 2.

The pressure sensor 10 is for detecting the pressure within the trap section 1c, and determining that sufficient water has accumulated in the trap section to cause a siphon when the pressure reaches a predetermined value, This judgment is made by the control means 8 provided at a suitable location in the toilet based on the output signal.

Further, as shown in FIGS. 2 and 3, the control valve 4 has a rubber 6 attached to the inner circumference of a cylindrical body 5 which is interposed between the trap portion 1c and the drain pipe 2 and has a substantially barrel shape when viewed from the side. Attach this rubber 6
Both upper and lower ends i6a, 6b of the cylindrical body 5! r, lower locking part 5
a, 5b, and allows water to flow in or out between the rubber 6 and the cylindrical body 5 by means of a three-way valve 7, which is driven by a control means 8. . Thus, according to the control valve 4, by letting water flow in through the three-way valve 7, the rubber 6 is moved to the second position.
As shown in FIGS. 3 and 3, the cylindrical body 5 bulges inward in the radial direction to close the pipe and discharge the force water, thereby opening the control valve 4.

The strength of the rubber 6 can be increased by covering its outer surface with a Teflon net, and in this structure, fins 6c are formed at the bottom as shown in FIG. , by causing the fin 6c to protrude radially inward when it expands, the degree of constriction (
It is also possible to efficiently increase the amount of closure.

The water supply pipe 3 guides flush water to the toilet bowl 1, and an on-off valve 9 for opening and closing the water supply pipe 3 is installed at an appropriate location,
A flow rate sensor 3a is provided to detect the flow rate of water flowing through.

The on-off valve 9 is constituted by, for example, a solenoid valve or an electric valve that is driven by the control means 8 based on a predetermined switch operation by the toilet user or a detection signal from the user, and the on-off valve 9 and the control The means 8 and the like constitute a washing water supply means according to the present invention.

FIG. 5 is a flowchart showing the operation of this embodiment in the above configuration, and the operation of this embodiment will be explained below with reference to FIG.

As mentioned above, when the cleaning operation is started based on a predetermined cleaning operation by the user or a detection signal from the user,
The control means 8 first opens the three-way valve 7 to the control valve side and closes the control valve 4 [Step 1], and then opens the on-off valve 9 to start water supply [Step 2]. Then pressure sensor 1
Whether the pressure P has reached a predetermined value based on the output signal of
In other words, enough water has accumulated in the trap part 1c in the ball part to cause the zyphon action [3Y] or not [3N]
[Step 3] If the pressure reaches a predetermined value [3Y], switch the three-way valve 7 to the drain side, drain the water in the valve body, and open the control valve 4 [Step 4] .

Note that this water can be automatically discharged by simply switching the three-way valve 7 to the drain side using the elastic force of the rubber 6 and the water pressure within the trap section. After that, on condition that the supply amount of cleaning water reaches a predetermined amount according to the output signal of the flow rate sensor 10, [5Y] the on-off valve 9 is closed to stop the water supply [Step 6], and the series of cleaning operations is completed. .

Although water is injected between the rubber 6 and the cylindrical body 5, other liquids or gases such as pressurized air may be injected instead of water.

Thus, according to this embodiment, the control valve 4 is closed to collect water in the trap section, and when enough water has accumulated to cause the siphon action, the control valve 4 is opened, so that a large amount of water can be removed. The siphon action can be effectively caused even without supply, and the cleaning can be performed efficiently.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment. For example, as a control valve, in addition to the embodiment described above, embodiments as shown in FIGS. 6 to 16 may be used. It is also possible to do this.

6 and 7 show ball pulp, and FIG. 7 shows a sectional view taken along the line BB in FIG. 6. In this embodiment, the drain pipe 2 is opened by rotating a ball valve 21 by a motor 20 driven by a control means. In the figure, 22° and 23 are sealing materials.

FIG. 8 shows a control valve using a shape memory alloy, in which there is a 9. The shape memory alloy 25 and 26 shown in FIG. 9 are arranged coaxially.
The shape memory alloy 2 becomes cylindrical when heated, and the shape memory alloy 2 shown in FIG.
6 is made to memorize the shape as much as possible into a string shape when heated, and when opening the shape memory alloy 25 shown in FIG. 9 is energized to heat it, while when closing the shape memory alloy 26 shown in FIG. 10 is energized. The control valve 4 is opened or closed, respectively.

11 and 12 show the shutter valve, and FIG. 12 shows a sectional view taken along the line CC in FIG. 11. The control valve 4 is configured such that a ring member 28 is rotated by a motor 27 to open and close a shutter 29, and the drain pipe 2 is opened and closed via a sealing rubber 30.

In the control valve 4 shown in FIG. 13, a rubber 31 is provided only on one side of the inner wall 2a of the drain pipe 2, and the same three-way valve 32 as shown in FIG. It was designed to make it possible.

14 and 15 show a butterfly valve, and FIG. 15 shows a sectional view taken along the line DD in FIG. 14. The control valve 4 has a butterfly valve 33 rotated by a motor 34 to close the drain pipe 2, similar to the aforementioned ball valve.

FIG. 16 shows a device in which a movable iron piece 35 is operated between coils 36, and a flat plate-shaped valve 35a provided at the tip thereof is moved forward and backward with respect to the drain pipe 2, thereby closing the drain pipe 2. It is.

The above has shown another embodiment of the control valve of the present invention, but there are other drain pipe structures in which a drain pipe 2 with a control valve 4 attached in advance is connected to a toilet bowl, as shown in Fig. 17. When constructing the toilet bowl, it may be attached near the upper end of the trap portion 1c, and this makes the construction work of the toilet bowl easier.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, the control valve is kept closed to regulate the discharge of washing water from the trap section, and sufficient water to cause the siphon action is produced. Since the control valve is opened when water has accumulated, even a small amount of washing water can effectively cause a siphon effect, and its discharge power does not decrease, increasing the washing effect and saving water. We can provide excellent flush toilets.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing a flush toilet according to the present invention, Fig. 2 is a longitudinal cross-sectional view showing a control valve, Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2, and Fig. 4 is another implementation of the control valve. FIG. 5 is a flowchart, FIGS. 6 to 16 are diagrams showing another embodiment of the control valve, and FIG. 17 is a diagram showing another embodiment of the drain pipe structure. In the drawings, 1 is a toilet bowl, 1a is a ball part, 1c is a trap part, 2 is a drain pipe, 4 is a control valve, 8 is a control means, 9 is an on-off valve, and 10 is a pressure sensor.

Claims (1)

[Scope of Claims] A flush toilet in which the flush water supplied into the bowl portion of the toilet bowl by the flush water supply means is caused to cause a siphon action in the trap portion and is discharged from the drain pipe, comprising: A control valve is provided to open and close the pipe, and a pressure sensor is provided at a suitable position in the trap section to detect the pressure at that position.When cleaning starts, the control valve is closed to supply cleaning water, and the pressure sensor 1. A flush toilet characterized by comprising a control means for opening said control valve and draining water when the pressure at said position based on an output signal reaches a predetermined value.