WO2007015405A1

WO2007015405A1 - Toilet bowl flushing device and air suction device

Info

Publication number: WO2007015405A1
Application number: PCT/JP2006/314793
Authority: WO
Inventors: Yasuhiro Shirai; Osamu Matsumoto; Aki Shirako; Haruo Yamasaki; Kenichi Ito; Yasuhiro Kondo; Ken Hirabayashi; Atsushi Ito
Original assignee: Inax Corporation
Priority date: 2005-08-01
Filing date: 2006-07-26
Publication date: 2007-02-08
Also published as: TW200718839A

Abstract

A toilet bowl flushing device and a toilet bowl flushing method capable of making compatible higher discharge capacity with higher water saving effect. The toilet bowl flushing device comprises a water feed means feeding wash water to the bowl (2) of a toilet bowl (1), a drain flow passage (5) continued with the downstream side of the water sealing part (4) of the toilet bowl (1), an air suction means sucking air from the drain flow passage (5), and a control means controlling the water feed means and the air suction means. The air suction means comprises an ejector (21) in which a negative pressure is produced when the wash water is passed therein, a tank (20) storing a negative pressure produced when the ejector (21) sucks air therein, an air suction pipe allowing the tank (20) to communicate with the drain flow passage (5), and a valve (V5) installed in the air suction pipe and opened and closed by the control means.

Description

Specification

Toilet bowl cleaning device and air intake device

Technical field

[0001] The present invention relates to a toilet bowl cleaning device and an intake device.

Background art

Conventionally, washing water is supplied to a water seal formed by a lower part of a toilet bowl and a rising conduit connected to the toilet bowl, and a drainage channel connected downstream of the water seal. A toilet flushing device that sucks air and generates a siphon action has been proposed (Patent Document 1). Patent Document 1 An example of a toilet flushing apparatus is an ejector provided in the middle of a water supply pipe for discharging water to a rim water passage of a toilet (referred to as “aspirator” in Patent Document 1). And a switching valve provided in a water supply pipe on the downstream side of the ejector. A pipe connected to the drainage channel is connected to the suction port of the ejector, and the switching valve is located in the middle of the pipe.

[0003] In the toilet cleaning by the toilet cleaning device, first, supply of cleaning water to the rim water passage is started while supplying cleaning water to the ejector. Immediately thereafter, the switching valve is switched, and the suction port of the ejector is connected to the drainage flow path. As a result, the ejector sucks air from the drainage channel by the negative pressure generated at the suction port. For this reason, siphon action occurs.

[0004] Further, a toilet cleaning device of Patent Document 2 has been proposed. An example toilet cleaning device described in Patent Document 2 is called a jet for discharging water to a water supply pipe cam water passage for supplying cleaning water, and an ejector (referred to as “jet pump” in Patent Document 2). ) And the ejector intake port is connected to the drainage channel by piping.

[0005] In the toilet cleaning by the toilet cleaning device, the supply of the cleaning water to the ejector is started simultaneously with the start of the supply of the cleaning water to the rim water passage. As a result, the ejector sucks air from the drainage channel by the negative pressure generated at the suction port. For this reason, siphon action occurs

[0006] Patent Document 1: Japanese Patent Laid-Open No. 10-96255

Patent Document 2: JP 2002-61262 A Disclosure of the invention

Problems to be solved by the invention

[0007] However, in the toilet bowl cleaning device described in Patent Documents 1 and 2, an ejector (aspirator, jet pump) is directly connected to a drainage flow path via a pipe. For this reason, the suction of air from the drainage channel depends on the suction capacity of the ejector. In this case, if the supply flow rate of the wash water to the ejector is small, the suction capacity of the ejector will be reduced, making it difficult for the siphon to occur, and the waste in the toilet bowl will be insufficiently discharged.

[0008] On the other hand, in order to keep the ejector suction capacity high, the flow rate of the cleaning water supplied to the ejector must be increased, which is contrary to water saving.

[0009] The present invention has been made in view of the above-described conventional situation, and should solve the problem of realizing a toilet cleaning device and an intake device that can achieve both higher discharge capacity and higher water-saving effect. It is an issue.

Means for solving the problem

[0010] The toilet bowl cleaning device of the present invention includes a water supply means for supplying cleaning water to the toilet bowl of a toilet bowl, a drainage channel connected to the downstream side of the water seal portion of the toilet bowl, and sucks air from the drainage channel In the toilet flushing apparatus, comprising: an intake means; and a water supply means and a control means for controlling the intake means.

The intake means includes: an ejector that generates a negative pressure when the cleaning water is passed through; a tank that stores a negative pressure generated when the ejector sucks air inside; and the tank and the drainage channel. An intake pipe that communicates;

And a valve provided in the intake pipe and opened and closed by the control means.

[0011] In the toilet bowl cleaning device of the present invention, when cleaning the toilet bowl, the negative pressure generated in the ejector is stored in the air tank, and the negative pressure in the air tank sucks air from the drainage flow channel on the downstream side of the water seal portion. . For this reason, the degree of freedom in opening the valve is increased, and a rapid suction can be performed. For this reason, siphon action occurs reliably at an early stage, and filth in the toilet bowl is discharged to the drainage channel. Therefore, even if the supply flow of washing water is small, the waste in the toilet bowl can be discharged sufficiently. Therefore, according to the toilet bowl cleaning device of the present invention, it is possible to achieve both higher discharge capacity and higher water-saving effect.

[0013] Various water supply means may be employed as long as it supplies cleaning water to the toilet bowl of the toilet bowl. From the viewpoint of controllability, it is preferable that the water supply means supply cleaning water directly from the water pipe. The drainage channel is a portion connected to the downstream side of the water seal portion of the toilet bowl, and the drainage channel may be integrated with the toilet bowl or separate from the toilet bowl. Various control means may be employed as long as they control the water supply means and the intake means.

[0014] In the toilet bowl cleaning device of the present invention, the ejector is preferably installed in a tank. In this case, the installation space for the ejector can be omitted. In addition, condensation and leakage from the ejector will accumulate on the bottom of the air tank, so it will not spill on the floor of the toilet room.

In the toilet bowl cleaning device of the present invention, it is preferable that a suction pipe for sucking air in the tank is connected to the ejector. In this way, air can be sucked from any part of the tank.

[0016] In the toilet bowl cleaning device of the present invention, the ejector is preferably installed outside the tank, particularly on the outer wall of the air tank. Further, it is preferable that a suction pipe that communicates with the tank and sucks air in the tank is connected. This makes it easier to manufacture ejectors and air tanks.

[0017] In the toilet bowl cleaning device of the present invention, it is preferable that the tip of the suction pipe is disposed near the bottom of the tank. If this is the case, the water collected at the bottom of the air tank can be sucked by the ejector.

[0018] The intake device of the present invention includes an ejector that generates a negative pressure, a tank that stores the negative pressure generated when the ejector sucks air inside, and the drainage flow connected to the downstream side of the water seal portion of the toilet. It has the intake pipe which connects a path | route and this tank, and the on-off valve provided in this intake pipe, It is characterized by the above-mentioned.

[0019] If the inhaler of the present invention is used in a toilet flushing and cleaning apparatus, it is possible to achieve both a higher discharge capacity and a higher water-saving effect as in the toilet flushing apparatus of the present invention.

Brief Description of Drawings FIG. 1 is a schematic diagram of a toilet bowl cleaning apparatus according to an embodiment.

FIG. 2 is a timing chart for explaining the operation of the toilet bowl cleaning device of FIG.

FIG. 3 is a schematic diagram for explaining the operation of the toilet bowl cleaning device of FIG. 1 during non-washing.

FIG. 4 is a schematic diagram for explaining the operation of the toilet bowl cleaning device of FIG. 1 in the process of raising the water level in the toilet bowl.

FIG. 5 is a schematic diagram for explaining the operation of the toilet cleaning device of FIG. 1 in the waste discharge process.

FIG. 6 is a schematic diagram for explaining the operation of the toilet bowl cleaning device of FIG. 1 in the air release process between the water seal part and the staying part.

FIG. 7 is a schematic diagram for explaining the operation of the toilet flushing device of FIG. 1 in the flooding / negative pressure accumulation process.

FIG. 8 is a schematic diagram for explaining the operation of the toilet bowl cleaning device of FIG. 1 in a standby state.

FIG. 9 is a schematic diagram of another toilet cleaning device.

FIG. 10 is a schematic view of still another toilet cleaning device.

FIG. 11 is a schematic view of a different toilet cleaning device. Explanation of symbols

[0021] 1 ... toilet bowl

2 ... toilet bowl

3 ... Rim

4 ... Water seal

5 ... Drainage channel

6 ... Retention part

7… Drain outlet

10 ... Water supply pipe

11 ... water turbine unit

20, 20A, 20B, 20C… Air tank

21 ... Ezekta

22… Air suction piping

23 Check valve 30 ... Float valve device

40 ... Camshaft

41, 42, 43, 44… cam

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of the toilet bowl cleaning apparatus of the embodiment, and FIG. 2 is a timing chart for explaining the operation of the toilet bowl cleaning apparatus of FIG. Figs. 3 to 8 show that the toilet bowl cleaning device of Fig. 1 is in order of the water level raising process in the toilet bowl, the filth discharge process, the air release process between the water seal part and the stay part, FIG. 5 is a schematic diagram for explaining an operation in a negative pressure accumulation process and a standby state. Note that in FIGS. 3 to 8, a part of FIG. 1 is omitted for easy understanding.

In the toilet bowl 1 made of earthenware, a rim 3 is provided on the upper inner periphery of the toilet bowl 2. A water seal part 4 is formed by the lower part of the toilet bowl 2 and the rising pipeline connected to it. The water sealing part 4 communicates with the drainage port 7 through the drainage channel 5 and the staying part 6. This drainage channel 5 is bent downward from the highest portion 4a of the water seal portion and continues to the retention portion 6. Drain port 7 is connected to the drain pipe

[0025] This staying portion 6 is constituted by a U-shaped flow path that wraps around below the lowest level portion 6b at the bottom of the pipe wall of the drainage flow channel 5 and then reaches the highest level portion 6a for overflow. The height of the highest part 6a of the stay part 6 is slightly higher than the lowest part 6b, and the lowest part 6b is submerged in the sealed water of the stay part 6 when the toilet is not used. .

[0026] However, the lowest level portion 6b may be slightly higher than the highest level portion 6a, and may be positioned slightly higher than the sealing surface of the retention portion 6 when the toilet is not used. Thus, even if the lowest level part 6b is higher than the sealing surface, when the negative pressure is applied to the drainage channel 5 or the water level rises due to water flowing into the retention part 6, the lowest level The part 6b can be immersed in the sealed water, and the space between the drain channel 5 and the drain port 7 side can be sealed.

[0027] As described below, the water supply means includes a water supply pipe 10 and a main valve V provided in the water supply pipe 10.

1 and the pressure regulating valve V installed in the water supply pipe 10 downstream of the main valve V, and the main valve V and the pressure regulating valve V

1 REG 1 To open the vacuum breaker 14 installed in the water supply pipe 10 downstream of the REG and the main valve V The first start valve V and the second start valve V are configured.

2 7

The water supply pipe 10 is connected to the rim 3. The toilet 1 is a one-way water supply system in which water is supplied to the rim 3 only from the rear side of the toilet bowl to the right side or left side. When water is supplied forward from the water supply pipe 10 toward the right or left rim 3 from the rear side of the toilet bowl, a clockwise or counterclockwise swirling flow is formed in the toilet bowl 2.

[0029] In this water supply pipe 10, water having a main valve V, a pressure regulating valve V, and a water wheel 12 in order from the upstream side.

1 REG

A car unit 11 and a vacuum breaker 14 are provided.

[0030] This main valve V applies a feed water pressure to the head side of the valve body to seat the valve body on the valve seat portion.

1

In addition to closing the valve, this head side water pressure is connected to the first start valve V or the second start

2

It is a hydraulically controlled valve that opens when it is opened by the valve V.

[0031] The drain side of the first start valve V is connected between the main valve V and the pressure regulating valve V via a pipe 18a.

2 1 REG

Has been. The drain side of the second start valve V communicates with a casing 50 described later. The first start valve V consists of a self-closing valve that opens when pressed and closes when released.

2

[0032] As will be described below, the intake means includes an ejector 21 and an ejector water supply valve V.

4 Piping 15, Air tank 20 for accumulating negative pressure, Piping for air suction with check valve 23 2 2, Intake pipe (piping for negative pressure transmission) connecting air tank 20 and drainage flow path 5 24, piping 25 and float valve device 30), on-off valve V provided in the intake pipe, and outlet of ejector 20

Five

It consists of a connected pipe 16 and a pipe 26 with an on-off valve V.

6

[0033] From a position between the water turbine unit 11 and the vacuum breaker 14 of the water supply pipe 10, a pipe 15 provided with an ejector water supply valve V branches off. The end of this pipe 15 accumulates negative pressure.

Four

It is connected to the inlet of the ejector 21 disposed in the air tank 20.

[0034] Since the ejector 21 is disposed in the air tank 20 as described above, a smaller installation space is sufficient compared to the case where the ejector 21 is disposed outside the air tank 20. In addition, even if the ejector 21 is condensed or water leaks from the joint between the ejector 21 and its piping, the condensed water or water leaks will accumulate at the bottom of the air tank 20 and will not wet the toilet room floor. .

A base end of an air suction pipe 22 having a check valve 23 is connected to an air suction port provided in a throat portion of the ejector 21. The tip of the pipe 22 is located near the bottom of the air tank 20, and even if water accumulates in the air tank 20, this water is distributed when the ejector 21 is activated. Suction is possible through the tube 22.

The check valve 23 allows air to flow from the air suction pipe 22 to the ejector 21 and prevents air from flowing in the opposite direction.

[0037] One end of the pipe 16 is connected to the outlet of the ejector 21, and the other end of the pipe 16 is drawn out of the air tank 20 and connected to the water port 30a at the top of the float valve device 30. . The lower part of the float valve device 30 communicates with the upper part of the drainage flow path 5 via a pipe 33. The configuration of the float valve device 30 will be described later.

[0038] The ejector 21 is installed with the water flow direction upward, and the pipe 15 is a water supply valve for the ejector.

The V force also falls and continues to the inlet at the lower end of the ejector 21. Piping 16 is ejector

Four

It stands up above the outlet at the top of 21. These pipe 15, ejector 21 and pipe 16 constitute a substantially U-shaped trap. This trap has a function of blocking the flow of water from the pipe 16 to the pipe 15 side.

[0039] However, the direction of the ejector 21 may be turned upside down and the water flow direction may be set downward. In this case, the pipe 15 falls to the upper inlet of the ejector 21 with the ejector feed valve V force falling.

Four

It is a series. Further, the pipe 16 rises upward in connection with the outlet at the lower end of the ejector 21.

[0040] A negative pressure transmission pipe 24 is connected to the upper part of the air tank 20, and this pipe 24 is connected to the negative pressure port 30b at the upper end of the float valve device 30 via the open / close valve V and the pipe 25.

Five

Has been.

[0041] A float valve support 32 is provided in the lower part of the float valve device 30, and a float valve 31 that can be moved in the vertical direction is disposed above the float valve support 32. When the float valve 31 is placed on the support body 32, the ports 30 a and 30 b communicate with the drainage flow path 5 through the pipe 33. When water flows into the float valve device 30 from the drainage flow path 5 through the pipe 33, the float valve 31 rises on this water and sits on the port 30b from below to close the port 30b. Prevents sewage from flowing from the pipe 25 to the air tank 20 side.

[0042] The pipe 26 branches off from the middle of the pipe 25, and the end of the pipe 26 is connected to the downstream side (near the drainage port 7) from the staying portion 6. This pipe 26 has an open / close valve V

6

Yes. [0043] The ejector water supply valve V applies a water supply pressure to the valve head and attaches the valve body to the valve seat.

Four

Sit down to close the valve and release the water pressure on the head side with the start valve V.

8

It is a hydraulically controlled valve that opens more. This start valve V is connected to the ejector by piping 35.

8

It communicates with the head side of the water supply valve V.

Four

[0044] As described below, the control means includes the turbine 12, the gear train 45, the camshaft 40, the forces 41, 42, 43, 44, the cam rods 41a, 42a, 43a, 44a, and the manual It consists of lever 46 and force.

[0045] The second start valve V for controlling the main valve V and the start valve V for controlling the ejector water supply valve V

1 7 4

The on-off valves V and V are both cam-driven, and the common camshaft 40

8 5 6

Actuated by the fixed cams 41, 42, 43, 44 and the cam rods 41a, 42a, 43a, 44a. The camshaft 40 is connected to the water wheel 12 in the water wheel unit 11 via a gear train 45. A manual lever 46 is fixed to the camshaft 40 so that it can be rotated manually.

A casing 50 is provided so as to surround the start valves V and V. Start valve V, V force

7 8 7 8 Drainage is discharged from the casing 50 to the rim 3 via the pipe 51.

Next, the operation of the toilet bowl cleaning device configured as described above will be described.

[0048] [Non-cleaning (Figure 3)]

In Fig. 2, at the time of non-cleaning before time t, the main valve V and the first and second start for the main valve

1 1

Valves V and V are closed.

2 7

[0049] In this state, the ejector starting valve V is opened, and the ejector water supply valve V is also opened.

8 4

Yes. However, since water is not passed through the water supply pipe 10, the ejector 21 is stopped.

[0050] In this state, the on-off valve V is closed and the air tank 20 is sealed. Follow

Five

Thus, the negative pressure accumulated in the air tank 20 is maintained as it is during the water-covering / negative pressure accumulating stroke described later.

[0051] In this state, the on-off valve V is open. Since the on-off valve V is open,

6 6

The water channel 5 communicates with the inside of the drain pipe and is usually at atmospheric pressure.

[0052] [Water level rising process in toilet bowl (Fig. 4)]

After the stool, the first activation valve V or the manual lever 46 is operated by the toilet user. [0053] For convenience of explanation, a case where the first activation valve V is operated will be described here.

2

[0054] When the first start valve V is operated, the water pressure on the head side of the main valve V causes the first start valve V to

2 1 2 to the downstream side of the main valve V, the main valve V opens. This allows cleaning from the water supply pipe 10

1 1

The water is supplied to the water cam 3, and flows down while turning along the inner surface of the toilet bowl 2, and a swirling flow is formed in the toilet bowl 2. At this time, a part of the water in the toilet bowl 2 overflows and flows out of the highest part 4a of the water seal, but the amount of inflow water from the rim 3 is larger, so the water level in the toilet bowl 2 rises. . This swirling flow collects filth at the center of the toilet bowl, and the paper loosens and blends into the water and disperses in the water. Force S is discharged smoothly. In addition, the water overflowing the highest portion 4a of the water seal portion is accumulated in the stagnation portion 6 and the water level on the drainage channel 5 side rises. Even when the water level in the retention part 6 has decreased due to drying or the like, the overflow level causes the water level in the retention part 6 to rise and the space between the drainage flow path 5 and the drain outlet 7 side is sealed. The This facilitates the formation of a discharge flow by the siphon action described later.

Further, when the cleaning water flows into the water supply pipe 10, the water wheel 12 in the water wheel unit 11 rotates, and the camshaft 40 rotates at a speed lower than that of the water wheel 11 via the gear train 45.

[0056] As the camshaft 40 rotates, the cams 42, 43, and 44 rotate, and the valves V, V, and V

8 5 6 Open the valve by imming.

[0057] The timing of opening and closing the valve will be described with reference to FIG.

[0058] When rotation of the camshaft 40 starts at time t, the second start valve V for the main valve opens immediately. Therefore, even after the first start valve V is closed by releasing the first start valve V, the main

twenty two

Water pressure is not applied to the head side of valve V, and main valve V remains open. The main valve V is

1 1 1 As stated above, it remains open until the second start valve V is closed.

[0059] After opening the main valve V, the water level in the toilet bowl 2 rises and the bowl surface is washed for a predetermined time.

1

Further, a swirl flow is formed as described above.

[0060] At this time, the ejector start valve V remains open and the ejector water supply valve V is also open.

8 4

Therefore, when water flows into the water supply pipe 10, water also flows into the ejector 21 to generate a negative pressure, and the air in the air tank 20 is sucked by this negative pressure, and the negative pressure is accumulated in the air tank 20. The discharged water from ejector 21 is discharged to drainage flow path 5 via pipe 16 and float valve device 30. Discharged. The inside of the float valve device 30 is washed with water by the drainage from the ejector at this time. Further, the waste water from the ejector accumulates in the staying part 6 through the drainage flow path 5, and thereby the water level on the drainage flow path 5 side of the staying part 6 rises.

[0061] When the predetermined time elapses, the ejector start valve V is closed and the ejector supply valve is closed.

2 8

Water valve V is closed. As a result, all the water passing through the water supply pipe 10 is supplied to the toilet bowl 2.

Four

I will become.

[0062] When time t is reached which is the same as or close to t, on-off valve V is closed, and drainage flow path 5 and drainage

2 3 6

Communication with the water outlet 7 via the pipes 25 and 26 is blocked, and the drainage channel 5 becomes a closed space.

[0063] [Soil discharge process (Figure 5)]

When the time t is reached, the open / close valve V opens. As a result, the negative pressure in the air tank 20 is distributed.

4 5

It is transmitted to the drainage flow path 5 through the pipes 24 and 25, the float valve device 30 and the pipe 33, and the air in the drainage flow path 5 is sucked. At this time, the water level in the toilet bowl 2 is sufficiently high as indicated by ΔΗ in Fig. 1, and the water head difference ΔΗ with the highest portion 4a of the water seal portion is sufficiently large. It is summer. For this reason, the sewage in the toilet bowl 2 is applied with the positional energy due to this head difference ΔΗ and the kinetic energy of the wash water supplied from the rim 3 to the valve bowl 2 superimposed on the negative pressure in the drainage channel 5. The power is vigorously discharged from the water sealing part 4 to the drainage flow path 5 by the force, and a discharge flow due to a strong siphon action is formed in the water sealing part 4 and the drainage flow path 5.

[0064] Thus, in this process, it is not necessary to supply water to the ejector 21 for negative pressure accumulation, so all the water passing through the water supply pipe 10 is supplied to the toilet bowl 2. For this reason, the water level in the stool 2 becomes sufficiently large, and the washing water supplied to the stool 2 is also strong enough to form a discharge flow due to a strong siphon action. In addition, sufficient negative pressure is accumulated in the air tank 20 in advance during the water level raising process in the toilet bowl, and this negative pressure is transmitted to the drainage flow path 5 in the main stroke, so the pressure in the drainage flow path 5 is instantaneously reduced. The siphon discharge flow is formed early.

[0065] When the sewage in the drainage flow path 5 is sucked into the float valve device 30, the float valve 31 rises due to buoyancy and closes the port 30b. This prevents the sewage in the drainage channel 5 from flowing back into the pipe 25 and the air tank 20. Further, as described above, the inner surface of the float valve device 30 contaminated with sewage is watered by the ejector discharge water during the operation of the ejector 21. Washed.

[0066] At time t in the final stage of the waste discharge process, the on-off valve V is closed and the air tank 20

5 5

The negative pressure transmission is stopped.

[0067] [Air release process between water seal part and stay part (Fig. 6)]

Thereafter, at time t ′, the release valve V is opened, and the space between the water seal part 4 and the retention part 6 is discharged.

5 6

Communicating with the water port 7, the space between the water seal part 4 and the retention part 6 returns to atmospheric pressure. Thereby, it is possible to stably cover the toilet bowl 2, the water sealing part 4 and the staying part 6 in the water covering negative pressure accumulating step described later.

[0068] [Water-covered negative pressure accumulation process (Fig. 7)]

After that, at time t, the ejector start valve V is opened.

6 8

Water supply valve V is opened. The on-off valve V is opened. At this point in time in toilet bowl 2

4 6 6

Almost all of the sewage is discharged, and the sewage and air are mixed and flow toward the drainage channel 5 with a so-called gobogobo and sound. At this time, since the on-off valve V is closed,

Five

Waste of negative pressure in the air tank 30 where air does not flow into the tank 20 is avoided.

[0069] When the on-off valve V is opened at the time t, the negative pressure in the drainage channel 5 is eliminated, and the toilet bowl 2

6 6

Drainage will also stop. At this time, water supply to the rim 3 continues through the main valve V and the water supply pipe 10.

1

As a result, water gradually accumulates in the toilet bowl 2 and is covered with water. The water level in stool 2 rises to the same level as the highest level 4a of water seal 4.

[0070] At time t, when the ejector water supply valve V is opened, the ejector 21 is activated,

6 4

Negative pressure is again accumulated in the air tank 20.

[0071] [Standby state (Fig. 8)]

At time t, the second start valve V for the main valve is closed. Following this, the main valve V is closed and the water supply pipe 10 stops flowing. Thereby, the toilet bowl cleaning apparatus is in a standby state.

[0072] With the stoppage of water supply pipe 10, water supply to ejector 21 is also stopped. A check valve 23 is provided between the slot of the ejector 21 and the air tank 20, so that air does not flow into the air tank 20 from the stopped ejector 21 and is stored in the air tank 20. The pressure is maintained as it is. [0073] The ejector water supply valve V and the on-off valve V remain open even at time t.

7 4 6

The condition continues until the next toilet flush (operation of first start valve V).

2

[0074] <Operation during manual steering>

The above explanation is for the case where the first start valve V for the main valve is operated.

2

A similar series of operations is performed when the is operated. In this case, the first start valve for main valve V

2 remains closed. The main valve V opens and closes following the opening and closing of the second start valve V. Other valves

1 7

The operation sequence of V to V and V is the same as in Fig. 2.

4 6 8

[0075] <Time difference between t and t>

14

When the main valve V is opened and water supply to the rim 3 is started, the air in the drainage channel 5 is sucked

1 1

The time difference from the starting time t is preferably 3 to 20 seconds, particularly about 7 to 15 seconds. In this way t

4 1

Instead of setting the interval of ~ t by the time difference, the water supply amount to the rim 3 may be set.

Four

[0076] <Another embodiment>

The present embodiment is an example of the present invention, and the present invention is not limited to the above embodiment. For example, as shown in Fig. 9, the ejector 21 can be installed on the side wall of the air tank 20A. As shown in Fig. 10, the ejector 21 can be installed on the upper wall of the air tank 20B. It can be installed on the lower wall of the air tank 20C. In the case of FIG. 11, the water accumulated in the air tank 20C can be sucked by the ejector 21 through the check valve 23.

[0077] In addition, all or some of the valves may be opened and closed by electrical control.

The embodiment described above may be a siphon jet cleaning that is a siphon cleaning.

[0079] In addition, the washing process may be different between stool and urine.

Industrial applicability

[0080] The present invention is applicable to flush toilets.

Claims

The scope of the claims

[1] A water supply means for supplying cleaning water to a toilet bowl of a toilet, a drainage channel connected to the downstream side of the water seal portion of the toilet, an intake means for sucking air from the drainage channel, the water supply unit, A toilet bowl cleaning device comprising a control means for controlling the intake means;

A toilet flushing device characterized by comprising a valve provided in the intake pipe and opened and closed by the control means.

[2] The toilet bowl cleaning device according to claim 1, wherein the ejector is installed in the tank.

[3] The toilet bowl cleaning device according to claim 2, wherein a suction pipe for sucking air in the tank is connected to the ejector.

[4] The toilet according to claim 1, wherein the ejector is installed outside the tank, and is connected to a suction pipe that communicates with the tank and sucks air in the tank. Cleaning device.

[5] The toilet bowl cleaning device according to claim 3 or 4, wherein a tip of the suction pipe is disposed near a bottom in the tank.

[6] an ejector that produces negative pressure;

A tank that stores negative pressure generated when the ejector sucks air inside, a drain pipe that communicates with the downstream side of the water seal of the toilet, and an intake pipe that communicates with the tank; and And an on-off valve.