WO2009101906A1

WO2009101906A1 - Toilet flush device and toilet flush method

Info

Publication number: WO2009101906A1
Application number: PCT/JP2009/052071
Authority: WO
Inventors: Takamasa Ina; Yasuhiro Kondo; Masafumi Fukagawa
Original assignee: Inax Corporation
Priority date: 2008-02-13
Filing date: 2009-02-06
Publication date: 2009-08-20
Also published as: JP2009191502A; JP5137607B2; TW200942668A

Abstract

A toilet flush device in which a siphon effect lasts for a long time period to reliably discharge bodily wastes and which works more silently, and a toilet flush method. The toilet flush device has a flush water supply device (10) for supplying flush water to a toilet bowl (2), and also has an air suction and discharge device (20) for sucking air from a toilet drain channel (5) and discharging air to the toilet drain channel (5). The toilet flush device has a control device (30) for controlling execution of water supply operation of the flush water supply device (10), execution of air suction operation of the air suction and discharge device (20), and execution of air discharge operation of the air suction and discharge device (20). The control device (30) causes a siphon effect by execution of water supply operation and execution of air suction operation. Further, the control device (30) terminates the siphon effect by executing air discharge operation prior to the completion of the water supply operation. When the level of flush water in the toilet bowl (2) descends to a position near an inflow opening (4), the flow rate of supply of flush water to the toilet bowl (2) by the flush water supply device (10) is substantially equal to the discharge flow rate of flush water discharged from the toilet drain channel (5).

Description

Toilet bowl cleaning device and toilet bowl cleaning method

The present invention relates to a toilet bowl cleaning device and a toilet bowl cleaning method.

Patent Document 1 discloses a conventional toilet cleaning device. This toilet cleaning device includes a cleaning water supply device that supplies cleaning water to the toilet bowl of the toilet body, suction of air from the toilet drainage channel connected to the inlet provided at the lower end of the toilet bowl, and air to the toilet drainage channel And an intake / exhaust device. In this toilet bowl cleaning device, when the flush water supply device supplies flush water to the toilet bowl and the water level in the toilet bowl rises, the intake / exhaust apparatus sucks air from the toilet drainage channel. This generates a powerful siphon action. When the water level in the toilet bowl is lowered due to the occurrence of the siphon action and the water level is lowered to the vicinity of the inflow port, the toilet bowl cleaning device increases the supply flow rate of the washing water to the toilet bowl. As a result, the water level in the toilet bowl rises again, and the siphon action is continued without breaking the water in the toilet bowl. For this reason, waste can be reliably discharged from the toilet bowl.

JP 2007-218038 A

However, in the above conventional toilet cleaning device, the speed at which the water level in the toilet bowl decreases to the vicinity of the inflow port varies depending on the supply flow rate of the cleaning water of the toilet cleaning device. For this reason, there exists a possibility that the timing which increases the supply amount of the washing water to the toilet bowl of a toilet bowl washing | cleaning apparatus may be after the water level in a toilet bowl falls from an inflow port. When the water level in the toilet bowl is lowered from the inflow port, air enters the toilet drainage channel from the inflow port, and the sealed water may be broken to end the siphon action. In this case, filth may not be discharged from the toilet bowl. Moreover, when air enters the toilet drainage channel from the inflow port, a breaking sound is generated. For this reason, in order to ensure that the siphon action continues and to discharge filth from the toilet bowl, the flush water supply flow rate of the toilet bowl cleaning device is increased, or the timing of increasing the flush water supply amount is advanced. Must.

The present invention has been made in view of the above-described conventional situation, and it is an object to be solved to provide a toilet cleaning device capable of saving water and reducing noise.

The toilet flushing device of the present invention is a toilet flushing device attached to a toilet bowl having a toilet bowl and a toilet drainage channel connected to an inflow port provided at the lower end of the toilet bowl,
A washing water supply device for supplying washing water to the toilet bowl;
An intake / exhaust device for sucking air from the toilet drainage channel and discharging air to the toilet drainage channel;
Execution of water supply operation in which the cleaning water supply device supplies cleaning water to the toilet bowl, execution of intake operation in which the air intake / exhaust device sucks air from the toilet drainage channel, and exhaust operation in which the intake / exhaust device exhausts air to the toilet drainage channel And a control device for controlling the execution of
The control device performs a water supply operation and an intake operation in order to generate a siphon action in the toilet drainage channel, and performs an exhaust operation in order to end the siphon action before the end of the water supply operation,
The supply flow rate of the wash water by the water supply operation of the wash water supply device is the discharge flow rate of the wash water drained from the toilet drainage channel when the wash water level in the toilet bowl descends to the vicinity of the inflow port. It is characterized by being substantially equal.

In this toilet bowl cleaning device, cleaning water is supplied from the cleaning water supply device to the toilet bowl, and siphon action is generated in the toilet drainage channel by the intake / exhaust device sucking air from the toilet drainage channel. The flow rate of the wash water drained from the toilet drainage channel decreases as the wash water level in the toilet bowl decreases and the potential energy of the wash water in the toilet bowl decreases. The flush water supply flow rate of the flush water supply device is approximately equal to the flush water drainage flow rate drained from the toilet drainage channel when the flush water level in the toilet bowl descends to the vicinity of the inflow port. Is maintained near the inlet. For this reason, since air does not enter the toilet drainage channel from the inflow port and the siphon action can be continued, filth can be reliably discharged from the toilet bowl with a small amount of washing water. In addition, since the siphon action of the toilet drainage channel continues, no sound is generated.

Therefore, the toilet bowl cleaning device of the present invention can achieve water saving and noise reduction.

The control device may execute the intake operation of the intake / exhaust device after executing the water supply operation of the cleaning water supply device. In this case, after the cleaning water is supplied from the cleaning water supply device to the toilet bowl and the water level in the toilet bowl rises, the intake / exhaust device sucks air from the toilet drainage channel. For this reason, the potential energy of the wash water increased in the toilet bowl is utilized, and the wash water can flow into the toilet drainage channel vigorously. Therefore, the waste in the toilet bowl can be reliably discharged.

The control device can execute the intake operation of the intake / exhaust device and execute the exhaust operation after the siphon action continues for a certain time. In this case, since the siphon action continues for a certain period of time, suspended filth and the like floating in the wash water in the toilet bowl can be reliably discharged from the toilet bowl together with the wash water.

The control device may execute the intake operation of the intake / exhaust device when the water level in the toilet bowl becomes a predetermined height after the water supply operation of the washing water supply device is executed. In this case, the potential energy of the wash water in the toilet bowl can be utilized as much as possible to generate a powerful siphon action, and filth can be reliably discharged from the toilet bowl.

The controller may cause the intake / exhaust device to perform an exhaust operation after reducing the supply flow rate of the wash water into the toilet bowl immediately before the end of the water supply operation of the wash water supply device. In this case, before the water enters the toilet drainage channel from the inflow port and the water seal portion is broken, the air can be discharged from the intake / exhaust device into the toilet drainage channel to terminate the siphon action. For this reason, toilet cleaning can be completed without producing a breaking sound.

The toilet flushing method of the present invention includes the supply of flush water to the toilet bowl provided in the toilet bowl body, the suction of air from the toilet drainage channel connected to the inlet provided at the lower end of the toilet bowl, and the toilet drainage channel A toilet flushing method for a flush toilet that enables the discharge of air,
After starting the supply of wash water to the toilet bowl, air is sucked from the toilet drainage channel, causing a siphon action in the toilet drainage channel,
The supply flow rate of the wash water supplied to the toilet bowl is substantially equal to the drainage flow rate of the wash water drained from the toilet drainage channel when the water level of the wash water in the toilet bowl descends to the vicinity of the inlet. After lowering the water level of the wash water in the pot, keep it near the inlet, continue the siphon action of the toilet drainage channel,
After the air is discharged to the toilet drainage channel and the siphon action of the toilet drainage channel is terminated, the supply of the washing water to the toilet bowl is terminated.

In this toilet flushing method, after starting the supply of wash water to the toilet bowl, by sucking air from the toilet drainage channel, the air is sucked from the toilet drainage channel and before the siphon action is generated, The water level can be raised. Thereby, while sucking air from the toilet drainage channel, the washing water can be made to flow into the toilet drainage channel vigorously by using the positional energy of the flushed water in the toilet bowl. For this reason, a powerful siphon action can be reliably generated in the toilet drainage channel.

The flow rate of the wash water drained from the toilet drainage channel decreases as the wash water level in the toilet bowl decreases and the potential energy of the wash water in the toilet bowl decreases. The flush water supply flow rate to the toilet bowl is approximately equal to the flush water drainage flow rate drained from the toilet drainage channel when the flush water level in the toilet bowl descends to the vicinity of the inflow port. The water level is maintained near the inlet after descending. For this reason, air does not enter the toilet drainage channel from the inflow port, and the siphon action can be continued. Therefore, filth can be reliably discharged from the toilet bowl with a small amount of washing water, and the siphon action of the toilet drainage can be terminated by discharging air to the toilet drainage while maintaining the siphon action. . For this reason, air enters the toilet drainage channel from the inflow port, the water seal portion does not break, and the toilet flushing can be finished without generating a broken sound.

Therefore, the toilet bowl cleaning method of the present invention can also achieve water saving and noise reduction.

It is a schematic diagram which shows the time of the non-washing | cleaning of the Western-style flush toilet bowl of an Example. It is a schematic diagram which shows the bowl washing | cleaning process of the western-style flush toilet bowl of an Example. It is a schematic diagram which shows the siphon generation | occurrence | production process of the Western-style flush toilet bowl of an Example. It is a schematic diagram which shows the siphon maintenance process of the Western-style flush toilet bowl of an Example. It is a schematic diagram which shows the water covering process of the western-style flush toilet bowl of an Example. It is a timing chart which shows the washing | cleaning process of the Western-style flush toilet bowl of an Example. It is a timing chart which shows the washing | cleaning process at the time of the low flow rate of the western-style flush toilet bowl of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Toilet body 2 ... Toilet bowl 4 ... Inflow port 5 ... Toilet drain channel 10 ... Washing water supply device 20 ... Intake / exhaust device 30 ... Control device

Hereinafter, an embodiment in which the toilet bowl cleaning device of the present invention is embodied in a flush toilet bowl will be described with reference to the drawings.

As shown in FIG. 1, the flush toilet includes a toilet body 1, a flush water supply device 10, an intake / exhaust device 20, and a control device 30. Of these, the toilet flushing device is composed of the washing water supply device 10, the intake / exhaust device 20, and the control device 30.

The toilet body 1 has a toilet bowl 2 and a rim 3 provided on the upper periphery of the toilet bowl 2. An inflow port 4 that opens on a horizontal plane is provided at the lower end of the toilet bowl 2. A toilet drainage channel 5 communicates with the inflow port 4. The toilet drainage channel 5 includes an ascending channel 6 and a descending channel 7. The ascending flow path 6 is formed integrally with the toilet body 1. The ascending flow path 6 and the toilet bowl 2 form a sealed water portion H in which washing water stays.

The descending flow path 7 communicates with an opening provided at the rising end of the rising flow path 6 and is formed by a toilet drain pipe 40 provided separately from the toilet body 1. The opening at the downstream end of the toilet drain pipe 40 communicates with a drain pipe connection port drawn out to a floor surface (not shown) via a drain connector 50. The toilet drain pipe 40 is provided with a communication pipe 41 for connecting the intake / exhaust device 20 to the upper surface.

The drainage connector 50 includes a casing 51 and an internal pipe 52 disposed in the casing 51. The casing 51 includes an inlet 51U provided on the upper surface and connected to the downstream end of the toilet drain pipe 40 via the packing P, and an outlet 51D provided on the lower surface and connected to the drain pipe. ing. The internal pipe 52 includes a descending channel 52A that is continuous with the inflow port 51U, and an ascending channel 52B that is continuous with the downstream end of the descending channel 52A and has a downstream port 52C that opens into the housing 51. . The internal pipe 52 has a water storage portion R formed by a descending channel 52A and an ascending channel 52B. The water reservoir R is completely sealed off with the washing water. For this reason, a closed space is formed in the toilet drainage channel 5 and the internal pipe 52 between the downstream side of the sealing portion H formed in the toilet body 1 and the upstream side of the storage portion R.

The washing water supply device 10 is connected to a water pipe (not shown). Moreover, the washing water supply apparatus 10 is comprised from the strainer apparatus which is not shown in figure from the upstream, the constant flow valve, and the on-off valve. A nozzle 11 is connected to the downstream side of the on-off valve. The downstream end of the nozzle 11 communicates with the rim 3 of the toilet body 1. Since the wash water discharged from the tip of the nozzle 11 flows down into the toilet bowl 2 while turning the rim 3, a swirling flow can be generated in the toilet bowl 2. The on-off valve employs a valve that gradually increases and decreases the water discharge flow rate when the valve is opened and closed, so that the water hammer phenomenon does not occur due to abrupt opening and closing of the valve.

The intake / exhaust device 20 includes an intake / exhaust tank 21 and a drive device 22. The intake / exhaust tank 21 is provided with a diaphragm 21 D that is movable in a vertical direction in a pan-shaped housing 21 H. An intake / exhaust pipe 21P is provided on the lower surface of the housing 21H. The intake / exhaust pipe 21 P is inserted and connected to the communication pipe 41 of the toilet drain pipe 40. The driving device 22 has a cylindrical case main body 22H extending in the vertical direction, a diaphragm 22D movable in the vertical direction within the case main body, and a rod-shaped body 22B having a disk-shaped push-up plate 22A capable of pushing up the diaphragm 22D from below. And a motor 22M that moves the push-up plate 22A up and down. The upper upper space 24 defined by the diaphragm 21D of the intake / exhaust tank 21 and the lower lower space 25 defined by the diaphragm 22D of the driving device 22 are connected by a connecting pipe 23.

In the intake / exhaust device 20 having such a configuration, the motor 22M rotates and the rod-like body 22B extends upward, whereby the push-up plate 22A is pushed upward, and the diaphragm 22D of the drive device 22 moves to the raised position. Then, the air in the upper space 24 of the intake / exhaust tank 21 is sucked into the lower space 25 of the drive unit, and the diaphragm 21D of the intake / exhaust tank 21 moves to the ascending position. Thus, an intake operation is performed in which the intake / exhaust tank 21 sucks air from the toilet drainage channel 5. Further, when the motor 22M rotates and the rod-like body 22B contracts downward, the push-up plate 22A descends, and the diaphragm 22D of the driving device 22 moves to the lowered position. Then, the air in the lower space 25 of the driving device 22 is pushed into the upper space 24 of the intake / exhaust tank 21, and the diaphragm 21D of the intake / exhaust tank 21 moves to the lowered position. Thereby, the exhaust operation in which the intake / exhaust tank 21 discharges air to the toilet drainage channel 5 is executed. Further, unless the diaphragm 22D of the driving device 22 is lowered, the diaphragm 21D of the intake / exhaust tank 21 is maintained at the raised position.

The control device 30 can control the opening / closing of the on-off valve constituting the cleaning water supply device 10 and the rotation of the motor 22M incorporated in the drive device 22 of the intake / exhaust device 20. Further, the control device 30 has a storage device capable of storing a plurality of these control patterns, and can be set to each control pattern by operating an operation remote controller or the like of a toilet bowl cleaning device (not shown).

The toilet bowl cleaning method by the toilet bowl cleaning apparatus of the present invention having the above configuration will be described according to each cleaning step. FIG. 6 shows the operation status of the toilet cleaning device by the control device 30 during the cleaning process, the change in the supply flow rate of the wash water to the toilet bowl 2, and the change in the wash water level (sealing surface position) in the toilet bowl 2. It is a timing chart.

[Non-cleaning (Fig. 1)]
As shown in FIG. 1, the toilet body 1 is formed with a sealed portion H with washing water. Further, the water reservoir R of the internal pipe 52 of the drainage connector 50 is completely sealed off with the cleaning water. For this reason, a closed space is formed in the toilet drainage channel 5 and the internal pipe 52 between the downstream side of the sealing portion H formed in the toilet body 1 and the upstream side of the storage portion R. The diaphragm 21D of the intake / exhaust tank 21 and the diaphragm 22D of the driving device 22 are disposed at the lowered position.

[Bowl cleaning process (Figure 2)]
The cleaning process is started by operating a cleaning switch on the operation remote controller of the toilet cleaning device (not shown). As shown in FIG. 6, the opening / closing valve of the cleaning water supply device 10 is opened by the control device 30 from the start of cleaning, and the water supply operation is executed. The flow rate of the wash water supplied from the nozzle 11 through the rim 3 into the toilet bowl 2 gradually increases with the opening of the on-off valve, and becomes a constant flow rate after a few seconds. This constant flow rate is the amount of water that is drained from the toilet drainage channel 5 when the water level in the toilet bowl 2 (hereinafter referred to as “sealed surface L”) descends to the vicinity of the inflow port 4 after occurrence of a siphon action described later. The flow rate is set approximately equal to the drainage flow rate of water. Since the washing water flows down into the toilet bowl 2 while turning the rim 3, a swirling flow is generated in the toilet bowl 2. The inner surface of the toilet bowl 2 can be effectively washed by the swirling flow of the washing water. Moreover, the sealing surface L gradually rises up to the point X in FIG. As shown in FIG. 2, at this stage, the wash water is supplied from the sealing portion H to the water storage portion R of the internal pipe 52 of the drainage connector 50 beyond the rising end of the rising flow path 6 of the toilet body 1. The Thereby, the water level of the reservoir part R rises and the reservoir part R is closed more reliably. In this step, the intake / exhaust device 20 is not operated, and the diaphragm 21D of the intake / exhaust tank 21 and the diaphragm 22D of the drive device 22 are arranged at the lowered position.

[Siphon generation process (Figure 3)]
At the time point X in FIG. 6, the sealing surface L rises to a specific position, and as shown in FIG. 3, the motor 22M of the driving device 22 is rotated by the control device 30 to push up the push-up plate 22A, and the diaphragm 22D. Is moved to the raised position in a short time. Thereby, the diaphragm 21 D of the intake / exhaust tank 21 is also moved to the raised position in a short time, and an intake operation for sucking air from the toilet drainage channel 5 at once is executed. Due to the synergistic effect of the intake operation and the potential energy of the wash water in the toilet bowl 2, the wash water in the toilet bowl 2 flows into the toilet drainage channel 5 vigorously while turning, and a powerful siphon action is generated. . For this reason, the filth in a toilet bowl, especially heavy filth can be reliably discharged | emitted from the toilet bowl 2 with a lot of washing water. As shown in FIG. 6, the sealing surface L is rapidly lowered to the vicinity of the inlet 4 between the time X and the time Y.

The siphon action also uses the potential energy of the wash water in the toilet bowl 2, so the point in time when the siphon action occurs is the strongest and weakens as the sealing surface L descends. For this reason, the wash water discharged from the toilet drainage channel 5 also decreases as the sealing surface L descends. As described above, the flow rate of the washing water supplied from the washing water supply device 10 to the toilet bowl 2 is drained from the toilet drainage channel 5 when the sealing surface L in the toilet bowl 2 descends to the vicinity of the inflow port 4. Therefore, at the point of time Y, the supply flow rate and the discharge flow rate of the wash water to the toilet bowl 2 are balanced.

[Siphon maintenance process (Fig. 4)]
From the time Y to the time Z in FIG. 6, as shown in FIG. 4, the intake / exhaust device 20 is not operated, and the diaphragm 21D of the intake / exhaust tank 21 is maintained at the raised position. Moreover, the washing water supplied to the toilet bowl 2 from the washing water supply apparatus 10 is maintained at a constant flow rate for a predetermined time from the Y point. Thereby, in the sealing part H, the water level difference between the water level A of the sealing surface L and the water level B in the vicinity of the downstream end of the toilet drainage channel 5 is maintained, and in the reservoir part R, in the vicinity of the downstream end of the toilet drainage channel 5. The water level difference between the water level B and the water level C at the downstream port 52C of the internal pipe 52 is maintained. Thereby, the siphon action is maintained while the sealing surface L is maintained in the vicinity of the inflow port 4. After a predetermined time has elapsed since time Y, the control device 30 closes the on-off valve of the cleaning water supply device 10. Thereby, the flow volume of the wash water supplied in the toilet bowl 2 is gradually reduced after the opening / closing valve is closed. During the siphon maintenance process, it is possible to reliably discharge floating dirt and the like floating in the wash water from the toilet bowl.

[Water-covering process (Fig. 5)]
At the time Z in FIG. 6, the control device 30 rotates the motor 22M of the driving device 22 to lower the push-up plate 22A downward and move the diaphragm 22D to the lowered position. The time required to move the diaphragm 22D from the raised position to the lowered position is set longer than that for moving the diaphragm 22D from the lowered position to the raised position. Thereby, the diaphragm 21 D of the intake / exhaust tank 21 is also moved to the lowered position, and an exhaust operation for discharging air to the toilet drainage channel 5 is executed. When air begins to be discharged into the toilet drainage channel 5 at the time Z, the siphon action is immediately terminated due to the influence. At this time, air does not enter the toilet drainage channel 5 from the inflow port 4, and no breaking sound is generated at the end of the siphon action. Thereafter, the sealing water L is returned to the normal position by the cleaning water supplied from the cleaning water supply device 10, the water covering is completed, and the cleaning is completed.

Therefore, the toilet bowl cleaning apparatus of the embodiment can achieve water saving and noise reduction.

The control device of this toilet bowl cleaning device stores a toilet bowl cleaning pattern that causes siphon action twice during a single cleaning process in a storage device. By executing this toilet bowl cleaning pattern, even when the tap water supplied to the cleaning water supply device 10 has a low flow rate, the filth can be reliably discharged from the toilet bowl.

The cleaning process using this toilet bowl cleaning pattern will be described. FIG. 7 is a timing chart showing the operation status of the toilet bowl cleaning device by the control device 30 during the cleaning process, the change in the supply flow rate of the wash water to the toilet bowl, and the change in the wash water level (sealing surface position) in the toilet bowl. It is. The description of the same contents as the above-described cleaning process is omitted.

[First bowl washing process]
The cleaning process is started by operating a cleaning switch on the operation remote controller of the toilet cleaning device (not shown). As shown in FIG. 7, the water supply operation of the cleaning water supply device 10 is executed by the control device 30 from the start of cleaning. The flow rate of the wash water supplied into the toilet bowl 2 gradually increases as the on-off valve opens, and after a few seconds, becomes a constant flow rate. This constant flow rate is set to a flow rate substantially equal to the drainage flow rate of the wash water drained from the toilet drainage channel 5 when the sealing surface L descends to the vicinity of the inflow port 4 after the siphon action occurs. The sealing surface L gradually rises until time X1 in FIG. In addition, since the tap water supplied to the washing water supply apparatus 10 is a low flow rate, the rising width of the sealing surface L is small.

[First siphon generation process]
At time X1 in FIG. 7, the control device 30 performs an intake operation in which the intake / exhaust device 20 sucks air from the toilet drainage channel 5. Due to the synergistic effect of the intake operation and the potential energy of the wash water in the toilet bowl 2, the wash water in the toilet bowl 2 flows into the toilet drainage channel 5 vigorously while turning, and a powerful siphon action is generated. . For this reason, the filth in a toilet bowl, especially heavy filth can be reliably discharged | emitted from the toilet bowl 2 with a lot of washing water. The sealing surface L falls rapidly to the vicinity of the inlet 4 between the time X1 and the time Y1. At the time Y1, the supply flow rate and the discharge flow rate of the wash water for the toilet bowl 2 are balanced.

[First siphon maintenance process]
From the time Y1 to the time Z1 in FIG. 7, the diaphragm 21D of the intake / exhaust tank 21 is maintained at the raised position. Moreover, the washing water supplied to the toilet bowl 2 from the washing water supply apparatus 10 is maintained at a constant flow rate. Thereby, the siphon action is maintained while the sealing surface L is maintained in the vicinity of the inflow port 4.

[Second bowl washing process]
At time Z1 in FIG. 7, the control device 30 performs an exhaust operation in which the intake / exhaust device 20 discharges air to the toilet drainage channel 5. When air begins to be discharged into the toilet drainage channel 5 at the time Z1, the siphon action is immediately terminated due to the influence. At this time, air does not enter the toilet drainage channel 5 from the inflow port 4, and no breaking sound is generated at the end of the siphon action. Thereafter, since a constant flow of cleaning water is supplied from the cleaning water supply device 10 to the toilet bowl 2, the sealing surface L gradually rises again.

[Second siphon generation process]
When the sealing surface L returns to the normal position at time X2 in FIG. 7, the intake / exhaust device 20 performs an intake operation for sucking air from the toilet drainage channel 5 by the control device 30. Compared to the first siphon generation process, the sealing surface L is low, so the siphon action is weak. Heavy filth is discharged at the time of the first siphon generation, and the purpose of the second siphon generation process is to discharge the floating filth floating in the washing water. Floating filth etc. can be discharged.

[Second Siphon Maintenance Process]
From the time Y2 to the time Z2 in FIG. 7, the diaphragm 21D of the intake / exhaust tank 21 is maintained at the raised position. The supply flow rate of the wash water supplied from the wash water supply device 10 to the toilet bowl 2 is maintained at a constant flow rate for a predetermined time from the time point Y2. Thereby, the siphon action is maintained while the sealing surface L is maintained in the vicinity of the inflow port 4. Since the second siphon action is aimed at discharging floating dirt, the time for maintaining the supply flow rate of the washing water at a constant flow rate is short. After a predetermined time has elapsed from time Y2, the control device 30 closes the on-off valve of the cleaning water supply device 10. The flow rate of the washing water supplied into the toilet bowl 2 gradually decreases after the opening / closing valve is closed.

[Water-covering process]
At time Z2 in FIG. 7, the control device 30 performs an exhaust operation in which the intake / exhaust device 20 discharges air to the toilet drainage channel 5. When air begins to be discharged into the toilet drainage channel 5 at the time Z2, the siphon action is immediately terminated due to the influence. At this time, air does not enter the toilet drainage channel 5 from the inflow port 4, and no breaking sound is generated at the end of the siphon action. Thereafter, the sealing water L is returned to the normal position by the cleaning water supplied from the cleaning water supply device 10, the water covering is completed, and the cleaning is completed.

Therefore, the toilet bowl cleaning apparatus of Example 1 can achieve water saving and noise reduction even when the tap water supplied to the cleaning water supply apparatus 10 has a low flow rate.

In the above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above-described embodiments, and it is needless to say that the present invention can be appropriately modified and applied without departing from the spirit of the present invention.

For example, the reservoir R provided in the internal pipe 52 of the drainage connector 50 connected to the downstream side of the toilet drainage channel 5 has air above the wash water stored in the reservoir R when not washed. It can be distributed and does not have to be completely blocked. In this case, the wash water is supplied to the water reservoir R, and the water level of the water reservoir R rises so that the water reservoir R is blocked and a closed space is formed on the upstream side.

Further, in the siphon maintenance process, it is sufficient that the supply flow rate of the wash water to the toilet bowl 2 of the wash water supply device 10 is substantially equal to the drainage flow rate of the wash water drained from the toilet drainage channel 5. May be different from the supply flow rate of the cleaning water in the siphon maintenance step. In other processes, the supply flow rate of the washing water may not be constant.

The present invention can be used for flush toilets.

Claims

A toilet cleaning device attached to a toilet body having a toilet bowl and a toilet drainage channel connected to an inflow port provided at the lower end of the toilet bowl,
A washing water supply device for supplying washing water to the toilet bowl;
An intake / exhaust device for sucking air from the toilet drainage channel and discharging air to the toilet drainage channel;
Execution of water supply operation in which the cleaning water supply device supplies cleaning water to the toilet bowl, execution of intake operation in which the air intake / exhaust device sucks air from the toilet drainage channel, and exhaust operation in which the intake / exhaust device exhausts air to the toilet drainage channel And a control device for controlling the execution of
The control device performs a water supply operation and an intake operation in order to generate a siphon action in the toilet drainage channel, and performs an exhaust operation in order to end the siphon action before the end of the water supply operation,
The supply flow rate of the wash water by the water supply operation of the wash water supply device is the discharge flow rate of the wash water drained from the toilet drainage channel when the wash water level in the toilet bowl descends to the vicinity of the inflow port. A toilet cleaning device characterized by being substantially equal.
The toilet cleaning device according to claim 1, wherein the control device executes an intake operation of the intake / exhaust device after executing a water supply operation of the cleaning water supply device.
The toilet cleaning device according to claim 1 or 2, wherein the control device executes an intake operation of the intake / exhaust device, and executes the exhaust operation after a siphon action continues for a predetermined time.
2. The control device according to claim 1, wherein after the water supply operation of the cleaning water supply device is executed, the intake operation of the intake and exhaust device is executed when the water level in the toilet bowl reaches a predetermined height. Or the toilet bowl washing | cleaning apparatus of 2.
The control device causes the intake / exhaust device to perform an exhaust operation after reducing the supply flow rate of the wash water into the toilet bowl immediately before the end of the water supply operation of the wash water supply device. Item 3. A toilet cleaning device according to item 1 or 2.
Enables supply of flush water to the toilet bowl provided in the toilet bowl body, suction of air from the toilet drainage channel connected to the inlet provided at the lower end of the toilet bowl, and discharge of air to the toilet drainage channel A toilet flushing method for a flush toilet,
After starting the supply of wash water to the toilet bowl, air is sucked from the toilet drainage channel, causing a siphon action in the toilet drainage channel,
The supply flow rate of the wash water supplied to the toilet bowl is substantially equal to the drainage flow rate of the wash water drained from the toilet drainage channel when the water level of the wash water in the toilet bowl descends to the vicinity of the inlet. After lowering the water level of the wash water in the pot, keep it near the inlet, continue the siphon action of the toilet drainage channel,
A toilet cleaning method, comprising: discharging air to the toilet drainage channel, and ending the siphoning operation of the toilet drainage channel, and then ending the supply of cleaning water to the toilet bowl.