JPH09296495A - Vacuum water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent scattering of water in a bowl when a drainage valve is opened in a toilet bowl having a trap by providing a vacuum water closet in which the possibility of breakage of water seal is largely reduced. SOLUTION: A water projecting pipe 22 is provided around a rim of a bowl 21 of a toilet bowl 20 and water is supplied from a feed water pipe 23 to the pipe 22 through a feed water valve 24 so as to be delivered into the bowl 21. A trap 25 is provided at the bottom of the bowl. 21 and a secondary side of the trap 25 is connected to a flow outlet passage 26. A bowl discharge port at an end of the passage 26 is connected to a vacuum pipe 10 through a drainage valve 9. At the trap 25, a suspended wall 27 is 'provided so as to space the passage 26 apart from the bowl 21. A venting port 28 is provided at the upper surface of the passage 26 near the wall 27 and one end of a venting pipe 29 is connected to the port 28. The other end of the pipe 29 is raised to a level higher than the bowl 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum flush toilet bowl in which a vacuum pipe is connected as a drain pipe to a toilet bowl through a drain valve, and particularly prevents water splash in a bowl when the drain valve is closed. The present invention relates to a vacuum flush toilet bowl.

[0002]

2. Description of the Related Art JP-A-4-38336 and JP-A-7-3
A conventional vacuum flush toilet as described in No. 857 will be described with reference to FIG.

A water spray pipe 3 is provided around the rim of the upper edge of the toilet 1, and flush water is supplied through the water supply valve 4 and the water supply pipe 5 to the wash water.
It can be supplied to Water spray holes are formed on the bottom surface of the water spray pipe 3 at predetermined intervals. The outlet 6 at the bottom of the bowl 2 is drained through a horizontally running drainage channel 7 and a drainage port 8.
Is in communication with. A vacuum pipe 10 is connected to the drain port 8 via a drain valve 9.

As the drain valve 9 is enlarged and shown in FIG. 3, a working chamber 12 is arranged at a side portion of the rubber tube 11 and the rubber tube 11 is closed in the working chamber 12 in a direction to close the diameter. A structure in which a biasing spring 13 is arranged is often used.

The working chamber 12 of the drain valve 9 and the vacuum pipe 10
And check valve 14, hose 15, valve 16 and hose 1
It is connected from 7.

By operating the cleaning button 19 and opening the valve 16, a negative pressure in the vacuum pipe 5 is introduced into the working chamber 12, and the rubber tube 11 expands in diameter as shown in FIG. 3 (b). The valve is opened. When the introduction of the negative pressure to the working chamber 12 is stopped by closing the valve 16, the rubber tube 11 is closed by the spring 13 and the valve is closed.

The water supply valve 4 is also of negative pressure type, and a hose 18 branched from the hose 17 is connected to a negative pressure actuator 4a of the water supply valve 4. When the valve 16 opens and negative pressure is transmitted to the hose 17,
Negative pressure is also introduced into the negative pressure actuator 4a, the water supply valve 4 is opened, and washing water is supplied to the water spray pipe 3. Valve 1
When 6 is closed, the water supply valve 4 is also closed.

Therefore, in this vacuum flush toilet, the water spray pipe 3 is inserted into the bowl 2 by opening the valve 16.
Wash water is supplied from the drain valve 9 is opened and the bowl 2
The contents (dirty water) of (1) are discharged to the vacuum pipe 10. Then, when a predetermined time has elapsed, the drain valve 9 is closed first, and after a while, the water supply valve 4 is closed and the water supply is stopped. Even after closing the drain valve 9,
This is to store the accumulated water in the bowl.

[0009]

In the vacuum flush toilet bowl shown in FIG. 4, the outflow passage 7 connected to the outflow port 6 of the bowl 2 is horizontally arranged below the outflow port 6.

In the toilet 1 having such a structure, if the flush water supply amount for storing the accumulated water after the drain valve 9 is closed is insufficient for some reason (for example, a decrease in water supply pressure), the drain valve 9 and the bowl 2 The inside is not separated by water, that is, the drain valve 9 is exposed to the atmosphere, and the odor generated near the outflow passage 7 and the drain valve 9 diffuses into the toilet room.

A first object of the present invention is to provide a vacuum flush toilet bowl in which the possibility of such water seal breakage is significantly reduced.

In order to achieve this first object, the present invention provides a trap portion on the inflow side of the outflow passage.
When the trap portion is provided in this way, there occurs a situation in which the water in the pot rises like water drops when the drain valve opens. A second object of the present invention is to prevent water from splashing in the bowl when the drain valve is closed in a vacuum flush toilet provided with a trap portion.

[0013]

The vacuum flush toilet bowl of the present invention is provided with a water supply means for supplying bowl flush water into a toilet bowl, and a vacuum flush toilet in which a vacuum pipe is connected to a toilet drain port through a drain valve. In the toilet bowl, a trap portion for isolating the drain valve from the inside of the bowl by a water seal is provided between the bottom portion of the bowl and the drain valve, and the trap portion is provided between the drain valve and the drain valve. Is provided with a means for communicating with the atmosphere on the upper surface of the outflow passage.

In the present invention, it is preferable that the communication means comprises a ventilation port provided on the upper surface of the outflow passage and a ventilation pipe connected to the ventilation port and standing up above the bowl. It is preferable that the vent pipe is provided with an open / close valve that is opened when the drain valve is open to prevent odor leakage.

In the vacuum flush toilet bowl of the present invention, since the trap portion is provided, the drain valve is sufficiently isolated from the bowl by the water seal.

Further, according to the present invention, by connecting the upper surface of the outflow passage between the trap portion and the drain valve to the atmosphere, it is possible to prevent water from splashing in the pot when the drain valve is closed.

That is, as a result of various researches conducted by the present inventor, in a vacuum flush toilet provided with a trap portion, air remaining in the outflow passage is compressed by flowing water pressure when the drain valve is opened. , When the drain valve is closed and the outflow pressure is released, the compressed air expands rapidly, which causes water to flow back from the outflow passage toward the bowl, causing water splash inside the bowl. I understand.

In the present invention, the pressure of the residual air when the drain valve is open allows the residual air pressure to escape to the atmosphere by connecting the upper surface of the outflow passage to the atmosphere, and the residual air is closed when the drain valve is closed. The backflow of water and the resulting water splash will not occur.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings. FIG. 1 is a sectional view of a vacuum flush toilet according to an embodiment of the present invention.

A water spray pipe 22 is provided around the rim portion of the bowl 21 of the toilet bowl 20, and water from the water supply pipe 23 is supplied to the water spray pipe 22 through a water supply valve 24, and the water spray pipe 22 is supplied to the water spray pipe 22. It flows out into the bowl 21 from the downwardly opening water spray port.
A trap portion 25 is provided at the bottom of the bowl 21, and the secondary side of the trap portion 25 is connected to the outflow passage 26. The toilet drainage port at the end of the outflow passage 26 is connected to the vacuum pipe 10 via the drainage valve 9.

The trap portion 25 is provided with a hanging wall 27 so as to separate the outflow passage 26 and the bowl 21. A ventilation port 28 is provided in the upper surface portion of the outflow passage 26 in the vicinity of the hanging wall 27.
Is provided, and one end of a ventilation pipe 29 is connected to the ventilation port 28. The other end of the ventilation pipe 29 is raised up above the bowl 21. An opening / closing valve 38 is provided in the ventilation pipe 29.

The working chamber 1 for the vacuum pipe 10 and the drain valve 9
2 is connected by a check valve 30, a hose 31, a control valve 32, and a hose 33.

The control valve 32 is a controller 34.
Receives a control signal. A control signal is also input from the controller 34 to the water supply valve 24 and the opening / closing valve 38. A signal is input to the controller 34 from the cleaning switch 35.

In the vacuum flush toilet having the above structure, when the washing switch 35 is turned on, the water supply valve 24 is opened to supply the washing water to the bowl 21, and the control valve 32 is opened to drain the water. The valve 9 is opened and the dirty water in the bowl 21 is discharged to the vacuum pipe 10. At this time, the open / close valve 38 is opened. After a lapse of a predetermined time, the drain valve 9 is first closed, then the water supply valve 24 is closed, and then the opening / closing valve 38 is closed.

In this toilet 20, if the vent hole 28 is not provided, the air remaining on the rear surface side of the hanging wall 27 when the drain valve 9 is opened is compressed by flowing water pressure, and the compressed air is drained. 9 When the valve is closed, water is pushed back to cause water splash in the bowl 21. However, in this embodiment, since the ventilation port 28 communicates with the atmosphere via the ventilation pipe 29 and the opened valve 38, the residual air after the rear surface of the hanging wall 27 is not compressed when the drain valve 9 is closed, Therefore, when the drain valve 9 is closed
It is not pushed back to. This prevents water from splashing inside the pot when the drain valve is closed.

Since the trap section 25 is provided,
Even when the amount of accumulated water in the drain valve 21 is small, the drain valve 9 and the outflow passage 26 are isolated from the pot 21 by the water seal.

In the above embodiment, the trap portion 25 is formed by providing the hanging wall 27, but in the present invention, a toilet 20 'having a U-shaped trap portion 25U as shown in FIG. 2 may be used. The other structure of FIG. 2 is the same as that of FIG.

In the above embodiment, the ventilation pipe 29 is raised to a position higher than the bowl 21.
No water overflows from the top of the. Further, since the opening / closing valve 38 is closed when the drain valve 9 is closed, odor does not flow out from the outflow passage 26 side. Furthermore, since the on-off valve 38 is closed after the water supply valve 24 is closed,
Air is also prevented from remaining in the outflow passage 26.

Although the drain valve 9 is directly connected to the drain port in the above embodiment, it is obvious that a pipe may be interposed between the drain valve 9 and the drain port. The toilet bowl 2 shown in FIGS.
0 and 20 'can be used as a normal Western-style toilet (in this case, a wall-mounted Western-style toilet) by closing the vent hole 28.

[0030]

As described above, according to the vacuum flush toilet bowl of the present invention, the drain valve and the outflow passage do not communicate with the atmosphere even when the amount of accumulated water is small, and the odor backflow is surely prevented. Further, according to the present invention, water splash in the pot when the drain valve is closed is prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vacuum flush toilet according to an embodiment.

FIG. 2 is a cross-sectional view of a vacuum flush toilet bowl according to another embodiment.

FIG. 3 is a cross-sectional view of a drain valve.

FIG. 4 is a sectional view of a conventional vacuum flush toilet bowl.

[Explanation of symbols]

 1,20,20 'Toilet bowl 2,21 Bowl 3,22 Water jet pipe 4,24 Water supply valve 7,26 Outflow passage 9 Drain valve 10 Vacuum pipe 25,25U Trap part 28 Vent port 29 Vent pipe 38 Open / close valve

Claims (3)

[Claims] 1. A vacuum flush toilet bowl having a water supply means for supplying flush water to the toilet bowl and a vacuum pipe connected to a toilet drain through a drain valve, wherein the bottom of the bowl and the drain valve are connected to each other. A trap portion for isolating the drain valve from the inside of the pot by a water seal is provided between, and a means for communicating with the atmosphere is provided on the upper surface portion of the outflow passage between the trap portion and the drain valve. A vacuum flush toilet bowl characterized by being provided with. 2. The communication means according to claim 1, wherein the communication means includes a ventilation port provided on an upper surface of the outflow passage, and a ventilation pipe connected to the ventilation port and standing up above the bowl. Vacuum flush toilet bowl. 3. The vacuum flush toilet bowl according to claim 2, wherein the vent pipe is provided with an opening / closing valve that is opened when the drain valve is open.