JPH09291578A - Control method of vacuum washing toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control method by which noise generated when a water drain valve is closed is reduced markedly. SOLUTION: When a wash switch 17 is pressed, a water supply valve 13 and a water drain valve 4 are opened to supply wash water to a bowl 11, and contents in the bowl 11 are discharged into a vacuum pipe 5. When time t1 elapses after the valves 13, 4 are opened, the water supply valve 13 is closed, and when time t2 elapses after the water supply valve 13 is closed, the water drain valve 4 is closed. Furthermore, when time t3 elapses after that, the water supply valve 13 is opened. When time t4 elapses, the water supply valve 13 is closed, and water is collected in the bowl 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for a vacuum flush toilet in which a vacuum pipe as a drain pipe is connected to a toilet via a drain valve, and in particular, it is improved to reduce noise when the drain valve is closed. The present invention relates to a method for controlling a vacuum flush toilet bowl.

[0002]

2. Description of the Related Art JP-A-4-38336 and JP-A-7-3
As described in No. 857 and the like, in a vacuum toilet system in which a vacuum pipe is connected to a drain outlet of a toilet via a drain valve, flush water is supplied to the toilet and the drain valve is opened to open the toilet bowl. Evacuate the contents into the vacuum pipe.

As this drain valve, as shown in FIG.
A structure in which a working chamber 2 is arranged on a side portion of a rubber tube 1 and a spring 3 for urging the rubber tube 1 in a direction to close the rubber tube 1 is arranged in the working chamber 2 is often used. Vacuum pipe 5 connected to the outflow port of this drain valve 4
The working chamber 2 and the working chamber 2 are connected by a hose 6, and a control valve 7 is provided in the middle of the hose 6.

By opening the control valve 7,
When a negative pressure in the vacuum pipe 5 is introduced into the working chamber 2, the third pressure
The rubber tube 1 is expanded in diameter as shown in FIG. Working chamber 2 by closing control valve 7
When the introduction of the negative pressure to the rubber tube 1 is stopped, the rubber tube 1 is closed by the spring 3 and the valve is closed.

In the conventional vacuum toilet bowl, the flush water is supplied to the bowl as described above, the drain valve is opened, and the bowl contents are discharged to the vacuum pipe. After a lapse of a predetermined time, the drain valve is first closed, and after a while, the water supply is stopped. The reason why water is still supplied for a while even after the drain valve is closed is to store water in the pot.

[0006]

In the conventional vacuum toilet described above, a large noise such as "gogo" is generated when the drain valve is closed.

It is an object of the present invention to provide a method of controlling a vacuum flush toilet which significantly reduces noise when the drain valve is closed.

[0008]

A method of controlling a vacuum flush toilet according to the present invention is provided with a water supply means for supplying flush water to a toilet bowl, and a vacuum pipe is connected to a toilet drain port through a drain valve. In the method for controlling the water supply means and the drain valve of the vacuum flush toilet, the water supply from the water supply means is stopped prior to closing the drain valve, and the water supply means is closed for a predetermined time after the drain valve is closed. The feature is that water is supplied to store the accumulated water in the toilet bowl.

In the present invention, when the drain valve is closed, it is preferable to stop the water supply from the water supply means before the drain valve is closed so that all the water in the toilet bowl is discharged to the vacuum pipe.

In the method for controlling a vacuum flush toilet according to the present invention, when the drain valve is closed, no or almost no water passes through the drain valve, and almost only air passes through the drain valve.

It has been confirmed as a result of various experiments that noise is significantly reduced when only air passes through the drain valve as described above, compared with when water and air pass through the drain valve.

The reason for this is not clear, but if water and air are allowed to pass through the drain valve while the drain valve is being closed, the water will be violently hit into the bottleneck where the water is closing, and loud noise will be generated. It is considered to be a thing.
In addition, in a drain valve made of a rubber tube having a negative pressure operation chamber on its side, water intermittently passes through the bottleneck portion of the rubber tube that is closing its diameter, which causes the inner surface of the rubber tube to It is considered that the two pieces frequently come into contact with and separate from each other as if chattering with each other, which also causes a large amount of noise.

When almost only air passes through the drain valve when the drain valve is closed as in the present invention, there is no such collision of water and frequent contact and separation between the inner surfaces of the rubber tubes, and the noise generated is extremely small. It is supposed that

In the present invention, after the drain valve is closed,
Since the required amount of water is supplied to the pot and the accumulated water is stored at the bottom of the pot,
It is possible to prevent dirt from adhering to the inner surface of the bowl when the toilet is used next time.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the installation of a vacuum toilet to which the control method according to the embodiment is applied, and FIG. 2 is a timing chart for opening and closing valves.

A water spray pipe 12 is provided around the rim of the upper edge of the bowl 11 of the toilet bowl 10, and washing water can be supplied to the water spray pipe 12 via a water supply valve 13 and a water supply pipe 14. Water spray holes are formed on the bottom surface of the water spray pipe 12 at predetermined intervals. Vacuum piping 5 is provided at the drain port of the bowl 11 via the drain valve 4.
Is connected.

A check valve 15 and a control valve 7 are provided in the middle of a hose 6 which connects the vacuum pipe 5 and the working chamber 2 of the drain valve 4.

The drain valve 4 is a rubber tube 1 as shown in FIG.
Is expanded and contracted by the pressure in the working chamber 2 and the spring 3 to open and close. A control signal is input to the control valve 7 and the water supply valve 13 from the controller 16. A signal is input to the controller 16 from the cleaning switch 17.

In the vacuum toilet thus constructed,
When the washing switch 17 is pressed, the water supply valve 13 and the drain valve 4 are opened as shown in FIG. 2 (a), the washing water is supplied to the pot 11, and the contents of the pot 11 are discharged to the vacuum pipe 5. To be done.

When time t ₁ elapses after the valves 13 and 4 are opened, the t ₁ timer incorporated in the controller 16 is timed up, and the water supply valve 13 is first closed to (t ₁ + t
₂ ) When the timer times out (that is, the water supply valve 13
When t ₂ has elapsed since the valve was closed), the drain valve 4 is closed. Further, when the time t ₃ elapses thereafter, (t ₁ + t
₂ + t ₃ ) Timer expires and water supply valve 13 opens. The water supply valve 13 is closed after the time t ₄ elapses, whereby the water is accumulated in the bowl 11.

By the way, the time t ₃ is set to a time sufficient for discharging all the water (dirt water) in the pot 11 to the vacuum pipe 5, and when the drain valve 4 is closed, the rubber tube of the drain valve 4 is closed. Substantially only air flows in the inside of 1. Therefore, the rubber tube 1 is closed smoothly, and the noise generated at this time is extremely small.

As a result of various experiments, according to the control of FIG. 2 (a), the noise when the drain valve 4 was closed was about 80 to 83 decibels.

For comparison, as shown in FIG. 2B, after the water supply valve 13 and the drain valve 4 are opened, the drain valve 4 is opened.
Was closed before the water supply valve 13,
The noise when the drain valve 4 is closed is 90 to 92 decibels,
It has been found that the present invention reduces noise by as much as about 8-10 decibels.

[0024]

As described above, according to the present invention, the noise generated when the drain valve of the vacuum toilet is closed can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vacuum toilet bowl to which a method according to an embodiment is applied.

FIG. 2 is a timing chart showing opening and closing of a water supply valve and a drain valve.

FIG. 3 is a cross-sectional view showing a drain valve of a vacuum toilet bowl.

[Explanation of symbols]

 1 Rubber tube 3 Working chamber 3 Spring 4 Drain valve 5 Vacuum piping 6 Hose 7 Control valve 10 Toilet bowl 11 Bowl 12 Water spray pipe 13 Water supply valve 17 Wash switch

Claims (2)

[Claims] 1. A method of controlling the water supply means and drain valve of a vacuum flush toilet having a water supply means for supplying pot cleaning water in a toilet bowl and a vacuum pipe connected to a toilet drain through a drain valve. In the above, the water supply from the water supply means is stopped prior to closing the drainage valve, and the water is supplied from the water supply means for a predetermined time after the drainage valve is closed to collect the accumulated water in the toilet bowl. How to control a vacuum flush toilet. 2. The water supply from the water supply means according to claim 1, wherein when the drain valve is closed, the water supply from the water supply means is stopped before the drain valve is closed so that all the water in the toilet bowl is discharged to the vacuum pipe. A method for controlling a vacuum flush toilet, comprising: