Toilet system

Abstract

To provide a toilet system ensuring user convenience.SOLUTION: The toilet system includes a detection unit that can detect a flow of washing water discharged from a toilet bowl, and a control unit that determines clogging of the toilet bowl based on a result detected by the detection unit, the control unit performing a first determination step of determining whether clogging has occurred in the toilet bowl when a first predetermined time has elapsed after washing water supply to the toilet bowl has started, and a second determination step of determining whether the clogging of the toilet bowl has been released after it has been determined in the first determination step that clogging has occurred in the toilet bowl, and wherein, if it is determined that clogging has occurred in the toilet bowl, the control unit prohibits supply of washing water to the toilet bowl.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Aspects of the present invention relate generally to toilet systems. [Background technology]

[0002] A toilet system is known that can detect blockages in a drain pipe through which flush water discharged from a toilet bowl flows (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-159203 Summary of the Invention [Problem to be solved by the invention]

[0004] The toilet system of Patent Document 1 increases the amount of flush water flowing into the drain pipe to unclog the drain pipe, which may result in flush water overflowing from the toilet bowl.

[0005] The present invention has been made based on the recognition of such problems, and has an object to provide a toilet system that is easy to use. [Means for solving the problem]

[0006] The first invention is a toilet system comprising a detection unit capable of detecting the flow of flush water discharged from a toilet bowl, and a control unit that determines whether the toilet bowl is clogged based on the detection results of the detection unit, wherein the control unit executes a first determination step of determining whether the toilet bowl is clogged or not when a first predetermined time has elapsed since the supply of flush water to the toilet bowl started, and a second determination step of determining whether the toilet bowl has been cleared of clogging after it has been determined in the first determination step that the toilet bowl is clogged, and is characterized in that if it is determined that the toilet bowl is clogged, the control unit prohibits the supply of flush water to the toilet bowl.

[0007] This toilet system can improve the accuracy of detecting clogged toilets. In addition, because flush water is prohibited from being supplied to a clogged toilet, flush water can be prevented from overflowing from the toilet.

[0008] The second invention is a toilet system characterized in that, in the first invention, the control unit determines whether a clog has occurred in the toilet bowl based on the amplitude of the voltage value detected by the detection unit during a period until a first predetermined time has elapsed in the first determination process, and determines whether the clog has been cleared in the toilet bowl based on the amplitude of the voltage value detected by the detection unit during a period until a second predetermined time has elapsed in the second determination process.

[0009] This toilet system can improve the accuracy of clogging determination with a simple configuration.

[0010] A third invention is a toilet system according to the first invention, characterized in that the control unit prohibits the supply of flush water to the toilet bowl during the first predetermined time, and if it is determined in the first determination process that no clog has occurred in the toilet bowl, lifts the prohibition on the supply of flush water to the toilet bowl, continues the prohibition on the supply of flush water to the toilet bowl into the second determination process if it is determined in the first determination process that a clog has occurred in the toilet bowl, and lifts the prohibition on the supply of flush water to the toilet bowl if it is determined in the second determination process that the clog has been cleared.

[0011] This toilet system prevents flush water from overflowing from the toilet by performing a re-flush even when the toilet is clogged. Also, when the toilet is unclogged, the prohibition on flush water supply is lifted, improving usability for users.

[0012] The fourth invention is a toilet system according to the first invention, further comprising an alarm unit that notifies that a clog has occurred in the toilet bowl, and when the control unit determines that a clog has occurred in the toilet bowl, it causes the alarm unit to notify that a clog has occurred, and when it determines that the clog has been cleared in the toilet bowl, it causes the alarm unit to cancel the clog notification.

[0013] This toilet system can quickly notify the manager or other personnel that a toilet may be clogged. In addition, if the toilet is unclogged, the clog notification is canceled, thereby reducing unnecessary notifications.

[0014] The fifth invention is a toilet system in which, in the first invention, the control unit executes a third determination process to determine whether the clog in the toilet has been cleared without prohibiting the supply of flushing water to the toilet after it has determined in the first determination process that the toilet is clogged, and executes the second determination process if it determines in the third determination process that the toilet is clogged a predetermined number of times or more.

[0015] According to this toilet system, if a clog occurs in the toilet in the first determination step, the system proceeds to the third determination step without prohibiting the supply of flush water. Therefore, the system can re-flush the toilet in the third determination step to attempt to unclog the toilet. This means that even if a clog occurs in the toilet, the system will not immediately prohibit use of the toilet, making the toilet system easy to use for users and managers. [Effects of the Invention]

[0016] According to aspects of the present invention, a user-friendly toilet system is provided. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a plan view showing a public toilet equipped with a toilet system according to an embodiment of the present invention; [Figure 2] This is a rear view showing the drain pipe joint unit located on the rear side of the toilet and the drain pipe line. [Figure 3] 3 is a cross-sectional view of the toilet, the drain pipe joint unit, and the drain pipe line as viewed from the direction of arrow AA in FIG. 2. [Figure 4] FIG. 2 is a perspective view showing a drain pipe joint unit and a drain pipe line. [Figure 5] FIG. 10 is an explanatory diagram of the range in which the detection unit can be attached. [Figure 6] FIG. 10 is a cross-sectional view showing the state in which cleaning water flows when there is no blockage. [Figure 7] FIG. 6 is a characteristic diagram showing a characteristic line of a detection value detected by a detection unit when there is no clogging. [Figure 8] FIG. 10 is a cross-sectional view showing the state in which cleaning water flows when there is a blockage. [Figure 9] FIG. 6 is a characteristic diagram showing a characteristic line of a detection value detected by a detection unit when a blockage is present; [Figure 10] 5 is a characteristic diagram showing characteristic lines of the detection value detected by the detection unit when there is a blockage and when the blockage is cleared. FIG. [Figure 11] 10 is a flowchart showing a clogging determination control executed by a control unit. [Figure 12] 12 is a flowchart showing a control process for confirming blockage removal in FIG. 11. [Figure 13] 10 is a flowchart showing a cleaning prohibition canceling process executed by the control unit when a cleaning prohibition canceling operation is performed. [Figure 14] 10 is a flowchart showing a blockage determination control executed by a control unit according to a modified example of the present invention. [Figure 15] 15 is a flowchart showing the wait-and-see control process in FIG. 14. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, like components are designated by like reference numerals and detailed descriptions thereof will be omitted where appropriate.

[0019] FIG. 1 is a plan view showing a public toilet equipped with a toilet system according to an embodiment of the present invention. FIG. 2 is a rear view showing the drain pipe joint unit located on the rear side of the toilet and the drain pipe line. 3 is a cross-sectional view of the toilet, the drain pipe joint unit, and the drain pipe line as viewed from the direction of arrow AA in FIG. As shown in Figure 1, the public toilet 1 includes a hand washing area 2, a hand dryer 3, and multiple toilet rooms TR. The public toilet 1 may also include urinals and other facilities. The public toilet 1 is, for example, a toilet that can be used by an unspecified number of users. The toilet rooms TR may also be toilet rooms installed in a home or the like.

[0020] Cabinet 10 is mounted on a wall or floor within a toilet room. An opening 11a is provided in front portion 11 of cabinet 10, penetrating in the front-to-rear direction. This opening 11a is provided to correspond to toilet bowl 20, which will be described later. Inside cabinet 10, a supply pipe 15, a drain pipe 17, a drain socket 30, a cable (not shown), and the like are arranged. In this specification, "up," "down," "front," "rear," "left," and "right" refer to directions as seen from a user seated on toilet bowl 20 with their back to cabinet 10.

[0021] A supply pipe 15 is provided for each toilet bowl 20. The supply pipe 15 connects a water supply source (for example, a water supply system) to the toilet bowl 20. Flush water supplied to the toilet bowl 20 flows through the supply pipe 15. An on-off valve 15a is provided in the supply pipe 15. The on-off valve 15a is, for example, a solenoid valve, and is opened and closed by operating a remote control 4 provided on the wall of the toilet room TR. When the on-off valve 15a is open, flush water flows from the supply pipe 15 to the toilet bowl 20.

[0022] The drain pipe 17 extends horizontally within the cabinet 10. The drain pipe 17 is connected to each of the drain pipe fittings 32 connected to the multiple toilet bowls 20 of the public toilet 1. The drain pipe 17 drains flush water and waste discharged from each toilet bowl 20 into the sewer. The drain pipe 17 has a junction pipe 17a connected to the drain pipe fittings 32 and a connecting pipe 17b connected to the junction pipe 17a.

[0023] The toilet bowl 20 is attached to the front surface 11 of the cabinet 10 at a position corresponding to the opening 11a. In other words, the cabinet 10 is located behind the toilet bowl 20. The toilet bowl 20 is attached to the cabinet 10 with a gap formed between it and the floor.

[0024] As shown in Figure 3, the toilet 20 is a so-called seated toilet, and has a concave bowl portion 21 that is recessed downward from the upper surface 20a. A toilet seat (not shown in Figure 3) on which a user sits is provided on the upper surface 20a of the toilet 20. The toilet 20 receives excrement such as urine and feces from the user in the bowl portion 21.

[0025] When the user operates the toilet flush using the remote control 4, flush water is supplied to the bowl portion 21 from the supply pipe 15. The flush water is discharged together with the excrement in the bowl portion 21 into the drain pipe 17 via the drain pipe joint 32. After the toilet flush is completed, flush water (sealing water) collects in the bottom portion 21a of the bowl portion 21.

[0026] The rear surface of the toilet 20 is provided with a supply port 23 to which the supply pipe 15 is connected, and a drain port 25 to which the drain pipe fitting 32 is connected. The supply port 23 is located on the top surface 20a of the toilet 20. The drain port 25 is located below the supply port 23 and opens toward the rear. The drain port 25 communicates with the bottom 21a of the bowl portion 21. In this case, the drain port 25 is located above the bottom 21a. As a result, flush water (sealing water) collects in the bottom 21a of the bowl portion 21 after the toilet flush is completed.

[0027] FIG. 4 is a perspective view showing the drain pipe joint unit and the drain pipe. FIG. 5 is an explanatory diagram of the range in which the detection unit can be attached. FIG. 6 is a cross-sectional view showing the state in which cleaning water flows when there is no blockage. FIG. 7 is a characteristic diagram showing a characteristic line of the detection value detected by the detection unit when there is no clogging. FIG. 8 is a cross-sectional view showing how cleaning water flows when there is a blockage. FIG. 9 is a characteristic diagram showing a characteristic line of the detection value detected by the detection unit when a blockage occurs.

[0028] The drain socket 30 is connected to the drain outlet 25 of the toilet 20. The drain socket 30 is cylindrical and made of, for example, a resin material. In this example, the junction pipe 17a is part of the drain socket 30. That is, the drain socket 30 has a drain pipe joint unit 31 connected to the drain outlet 25, and the junction pipe 17a. The junction pipe 17a may be integrated with the connecting pipe 17b of the drain pipe 17. In this case, one end of the drain socket 30 (drain pipe joint unit 31) is fixed to the drain outlet 25, and the other end is fixed to the junction pipe 17a of the drain pipe 17.

[0029] The drain pipe joint unit 31 is located between the toilet 20 and the drain pipe 17. The drain pipe joint unit 31 has a drain pipe joint 32 through which flush water flows, and a detection unit 36 provided in the drain pipe joint 32. The drain pipe joint 32 has a first connecting pipe 33 that is connected to the drain outlet 25 of the toilet 20, and a second connecting pipe 34 that is connected to the first connecting pipe 33. Flush water discharged from one toilet 20 flows through the drain pipe joint 32.

[0030] The first connecting pipe 33 has an opening 33a. As shown in Figure 3, in the drain pipe fitting unit 31, the drain outlet 25 of the toilet 20 is inserted into the opening 33a of the first connecting pipe 33. The second connecting pipe 34 is a bendable bellows pipe. The second connecting pipe 34 absorbs the force exerted by the flush water, waste, etc., and allows the flush water, waste, etc. to flow smoothly into the drain pipe 17.

[0031] The detector 36 detects the flow of flush water discharged from the toilet bowl 20. The detector 36 is provided in the drain pipe joint 32. The detector 36 is made up of, for example, a radio wave sensor, and detects the flow of flush water flowing inside the drain pipe joint 32. Specifically, the detector 36 detects the magnitude of the waves in the flush water flowing inside the drain pipe joint 32. The detector 36 may also detect the flow speed of the flush water flowing inside the drain pipe joint 32. The detector 36 may also be provided in the toilet bowl 20, as long as it can detect the flow of flush water discharged from the toilet bowl 20.

[0032] By using a radio wave sensor for the detection unit 36, radio waves can be transmitted to the drain pipe joint 32. Therefore, without having to modify the existing drain pipe joint 32, simply by adhering the detection unit 36 to the drain pipe joint 32, the flow of flush water discharged from the toilet bowl 20 can be easily detected by the detection unit 36 (radio wave sensor).

[0033] When the flow rate of flush water flowing through the drain pipe joint 32 is high, the flow speed is fast and the waves are large. On the other hand, when the flow rate of flush water flowing through the drain pipe joint 32 is low, the flow speed is slow and the waves are small. The detection unit 36 transmits the detected value to the control unit 40. The detection unit 36 may be a vibration sensor that detects vibration components based on the flow of flush water flowing through the drain pipe joint 32, or a flow sensor that detects the flow of flush water from the amount of movement of a string-like member extending through the drain pipe joint 32.

[0034] Of the first connecting pipe 33 and the second connecting pipe 34, the detecting unit 36 is provided in the first connecting pipe 33. Because the outer surface of the second connecting pipe 34 is bellows-shaped, it is difficult to bring the detecting surface of the detecting unit 36 into close contact with it. In addition, the second connecting pipe 34 vibrates significantly due to the flow of cleaning water W.

[0035] Therefore, if the detector 36 were provided on the second connecting pipe 34, there is a risk that the detection accuracy of the detector 36 would decrease. On the other hand, the first connecting pipe 33 is the part that is fixed to the drain outlet 25 of the toilet 20, and is therefore a part that is subject to little vibration. Therefore, the detector 36 is provided on the first connecting pipe 33, which is the part of the drain pipe joint 32 that is subject to little vibration.

[0036] As shown in Fig. 5, the detection unit 36 is provided in the upper part 33b of the first connecting pipe 33. The upper part 33b is located above the center in the vertical direction of the first connecting pipe 33 (the dotted line indicating 0 degrees in Fig. 5). The detection unit 36 is preferably provided within a range B of 40 degrees or more and 140 degrees or less from the 0 degree dotted line.

[0037] The inner surface of range B of first connecting pipe 33 is located away from the flush water W flowing through first connecting pipe 33, and is therefore an area where water droplets splashing from the flush water W or wet toilet paper are less likely to adhere. Therefore, by providing detection unit 36 within range B, it is possible to accurately detect the flow of flush water W flowing through first connecting pipe 33. In this example, detection unit 36 is located at a position at 90 degrees from the dotted line at 0 degrees.

[0038] 6 and 8, the detection unit 36 irradiates radio waves P toward the water surface W1 of the cleansing water W flowing in the lower part of the first connecting pipe 33. That is, the detection unit 36 is provided in a position facing the water surface W1 of the cleansing water W. The detection unit 36 receives radio waves reflected from the water surface W1, thereby detecting the magnitude of the waves on the water surface W1.

[0039] As shown in Figure 6, when there is no blockage in the toilet bowl 20, a large amount of flush water W flows through the first connecting pipe 33. As shown in Figures 6 and 7, when a large amount of flush water W flows through the first connecting pipe 33, the waves on the water surface W1 become larger, and the voltage value V detected by the detection unit 36 becomes larger.

[0040] On the other hand, as shown in Figure 8, when a clog has occurred in the toilet bowl 20, a small amount of flush water W flows through the first connecting pipe 33. As shown in Figures 8 and 9, when a small amount of flush water W flows through the first connecting pipe 33, the waves on the water surface W1 become smaller, and the voltage value V detected by the detection unit 36 becomes smaller.

[0041] The junction pipe 17a is connected to the second connecting pipe 34 of the drain pipe joint 32. As shown in FIG. 4, the junction pipe 17a extends in a direction perpendicular to the second connecting pipe 34. Connecting pipes 17b are connected to both ends of the junction pipe 17a. Flush water discharged from multiple toilet bowls 20 flows through the junction pipe 17a. In this example, the junction pipe 17a is part of the drain socket 30.

[0042] Next, we will explain the toilet system 100 for determining whether or not there is a clog in the toilet bowl 20. The toilet system 100 includes a detection unit 36 and a control unit 40.

[0043] The control unit 40 determines whether the toilet 20 is clogged based on the detection result of the detection unit 36. If a clog has occurred in the toilet 20, the control unit 40 prohibits the supply of flush water to the toilet 20. The control unit 40 has a memory unit 41 that stores a control processing program for determining whether the toilet 20 is clogged. The memory unit 41 stores a first detection threshold V1 and a second detection threshold V2 for determining whether the toilet 20 is clogged.

[0044] The control unit 40 also controls the opening and closing of the on-off valve 15a. A control program for controlling the opening and closing of the on-off valve 15a is stored in the memory unit 41. The control unit 40 controls the opening and closing of the on-off valve 15a based on a command signal from a remote control 4 installed on the wall of the toilet room TR or the like. The control unit 40 also controls the opening and closing of the on-off valve 15a based on the results of a clog determination for the toilet bowl 20. Note that the control of the clog determination for the toilet bowl 20 and the opening and closing control of the on-off valve 15a may be performed by separate control units.

[0045] The toilet system 100 also has a release switch 45 that releases the prohibition on flush water supply. The release switch 45 is provided in, for example, the control unit 40. The release switch 45 can be operated only by, for example, a manager or a cleaner. The control unit 40 releases the prohibition on flush water supply when it receives a flush prohibition release signal transmitted from the release switch 45. In other words, a manager or a cleaner can release the prohibition on flush water supply by operating the release switch 45.

[0046] The release switch 45 may be provided in a position different from the control unit 40. The release switch 45 may also be provided in a terminal held by a manager or a cleaner, and a cleaning prohibition release signal may be transmitted to the control unit 40.

[0047] As shown in FIG. 3, the toilet system 100 further includes an alarm unit 60 that alerts the user that a clog has occurred in the toilet bowl 20. The communication unit 50 is provided between the control unit 40 and the alarm unit 60. The communication unit 50 transmits the clog state of the toilet bowl 20 determined by the control unit 40 to the alarm unit 60. The alarm unit 60 may be, for example, a mobile terminal or PC terminal of the manager who manages the public toilet 1. By checking the alarm unit 60, the manager can determine which toilet bowl 20 in the public toilet 1 is clogged. The alarm unit 60 may also be a display unit or audio generator provided in the toilet bowl 20 or toilet room TR.

[0048] Next, the determination of clogging of the toilet 20, and the prohibition and release of flush water supply that are carried out by the control unit 40 will be explained with reference to Figs. 7 and 9 to 12. FIG. 10 is a characteristic diagram showing characteristic lines of the detection value detected by the detection unit when there is a blockage and when the blockage is cleared. The characteristic diagram shown in FIG. 10 shows an example of a case where the toilet 20 becomes clogged and then clears naturally afterwards.

[0049] First, when the control unit 40 receives a command signal from the user operating the toilet flush on the remote control 4, it opens and closes the on-off valve 15a. This causes flush water W to be supplied from the supply pipe 15 to the toilet 20.

[0050] That is, time t1 shown in Figures 7, 9 and 10 is when the control unit 40 receives a command signal to operate the toilet flush, or when the on-off valve 15a is opened. The control unit 40 begins measuring the first predetermined time T1 from time t1, and monitors the flow of flush water W during that first predetermined time T1. The determination of a clog at the first predetermined time T1 constitutes the first determination step.

[0051] 6, when no blockage has occurred in the toilet 20, a large amount of flush water W flows into the drain pipe joint 32. The detection unit 36 detects the flow of flush water W flowing inside the drain pipe joint 32.

[0052] Specifically, as shown in Figure 7, when the supply of flush water W begins at time t1, the detection unit 36 receives radio waves reflected from the surface W1 of the flush water W until time t2 after the first predetermined time has elapsed. The first predetermined time T1 is the time from when the supply of flush water begins until the flush water has finished flowing if there is no blockage in the toilet bowl 20, and is, for example, about 15 seconds.

[0053] Furthermore, the control unit 40 prohibits the supply of flush water to the toilet 20 during the first predetermined time T1. Even if the control unit 40 receives a command signal to flush the toilet sent from the remote control 4 during the first predetermined time T1 (between time t1 and time t2), the control unit 40 invalidates the command signal. In other words, the control unit 40 sets the flush prohibition time when it receives a command signal to flush the toilet. Note that the flush prohibition time may be set at any time between time t1 and time t2.

[0054] 6 and 7, when no clog has occurred in the toilet 20, the waves of the flush water W flowing through the drain pipe joint 32 become larger, and the amplitude of the detection value (voltage value V) becomes larger. The control unit 40 compares the detection value V detected by the detection unit 36 with the first detection threshold V1. The control unit 40 then counts the number of times N that a detection value V equal to or greater than the first detection threshold V1 has been detected in terms of the amplitude of the detection value V.

[0055] At time t2, when the first predetermined time T1 has elapsed, the control unit 40 determines whether or not a clog has occurred in the toilet 20. Specifically, the control unit 40 determines that the toilet 20 is "not clogged" if the number of times that the detection value V has exceeded the first detection threshold V1 is equal to or greater than the first count threshold N1.

[0056] For example, by setting first number threshold N1 to multiple times, control unit 40 can reduce false detection of toilet clogging due to noise, etc. Furthermore, if control unit 40 determines at time t2 that toilet 20 is "not" clogged, it lifts the prohibition on supplying flush water to toilet 20. In other words, control unit 40 changes the toilet flush command signal sent from remote control 4 from disabled to enabled.

[0057] Next, what happens when clogging occurs in the toilet 20 will be described with reference to FIGS.

[0058] When a clog occurs in the toilet 20, a large amount of flush water accumulates inside the bowl portion 21 of the toilet 20. Therefore, as shown in Figure 8, only a small amount of flush water W flows into the drain pipe fitting 32. The toilet paper that caused the clog may then be pushed by the flush water, causing the clog in the toilet 20 to clear naturally. If the supply of flush water is prohibited when a clog occurs in the toilet 20, the prohibition on the supply of flush water will continue even if the clog subsequently clears naturally, and there is a risk that the toilet 20 may become unusable.

[0059] Therefore, the control unit 40 monitors whether or not the clog in the toilet 20 has been cleared after a clog has occurred in the toilet 20. The control unit 40 has a first determination step that executes a clog determination after the toilet 20 has been flushed, and a second determination step that is executed if a clog has occurred in the toilet 20 in the first determination step.

[0060] The first determination step is a step of determining whether or not a clog has occurred in the toilet 20 when flush water W is supplied to the toilet 20. As described above, in the first determination step, the amplitude of the detection value V (voltage value) detected by the detection unit 36 is detected, and whether or not a clog has occurred in the toilet 20 is determined from the number of times N that the detection value V has become equal to or greater than the first detection threshold V1.

[0061] As shown in Figures 8 and 10, when a clog has occurred in the toilet 20, flush water accumulates inside the toilet 20, and a small amount of flush water W flows into the drain pipe joint 32. As shown in Figures 9 and 10, when a clog has occurred in the toilet 20, the waves of the flush water W flowing inside the drain pipe joint 32 become smaller, and the amplitude of the detected value (voltage value V) becomes smaller.

[0062] At time t2, when the first predetermined time T1 has elapsed, the control unit 40 determines whether or not a clog has occurred in the toilet 20. Specifically, the control unit 40 determines that the toilet 20 is "clogged" if the number N of times that the detection value V has exceeded the first detection threshold V1 is less than the first number threshold N1.

[0063] Furthermore, the control unit 40 causes the communication unit 50 to send a clog signal indicating that a clog has occurred in the toilet 20 to the notification unit 60. Upon receiving the clog signal, the notification unit 60 notifies the user that a clog has occurred in the toilet 20.

[0064] If the control unit 40 determines in the first determination step that a clog "exists," it proceeds to the second determination step. The control unit 40 continues in the second determination step the prohibition on supplying flush water to the toilet 20 that was set in the first determination step. This allows flush water W to be supplied to the toilet 20 in which a clog has occurred, and prevents flush water W from overflowing from the toilet 20.

[0065] In the second determination step, it is determined whether or not the toilet 20 has been cleared of clogging within the second predetermined time T2. That is, the control unit 40 begins measuring the second predetermined time T2 from time t2, and monitors the flow of flush water W during the second predetermined time T2. The second predetermined time T2 is, for example, several tens of seconds (e.g., 20 seconds).

[0066] As shown in Figure 10, if a foreign object (such as toilet paper) causing a clog flows into drain pipe fitting 32 at time tx, which is after time t2, a large amount of flush water in bowl portion 21 will flow into drain pipe fitting 32. In such a case, the flow rate and waves of flush water W flowing through drain pipe fitting 32 will increase. As a result, after time tx, the amplitude of detection value V detected by detection unit 36 will increase.

[0067] The control unit 40 determines whether the clog in the toilet 20 has been cleared at time t3, when a second predetermined time T2 has elapsed since time t2. Specifically, the control unit 40 determines that the clog in the toilet 20 has been "cleared" if the number of times that the detection value V has reached or exceeded the second detection threshold V2 is equal to or greater than the second count threshold N2. When the clog in the toilet 20 is cleared, the flush water in the bowl section 21 flows into the drain pipe fitting 32 all at once, causing the waves of the flush water W to be larger than those of normal flush water W. Therefore, the second detection threshold V2 is set to a value greater than the first detection threshold V1.

[0068] For example, by setting second count threshold N2 to multiple times, control unit 40 can reduce false detections of toilet clog unclog due to noise, etc. Furthermore, if control unit 40 determines that the toilet 20 is "cleared" at time t3, it lifts the prohibition on supplying flush water to toilet 20. In other words, control unit 40 changes the toilet flush command signal sent from remote control 4 from disabled to enabled.

[0069] Furthermore, control unit 40 causes communication unit 50 to send a cancellation signal to notification unit 60 to cancel the notification of a clog in toilet 20 issued by notification unit 60. Upon receiving this cancellation signal, notification unit 60 cancels the notification of a clog in toilet 20.

[0070] FIG. 11 is a flowchart showing the clogging determination control executed by the control unit. FIG. 12 is a flowchart showing the blockage removal confirmation control process in FIG. 11 and 12 are stored in the storage unit 41 of the control unit 40. In FIGS. 11 and 12, each step is indicated by "S."

[0071] First, the first determination step executed by the control unit 40 will be described with reference to Fig. 11. A first predetermined time T1, a first detection threshold V1, and a first count threshold N1 for execution in the first determination step are stored in advance in the storage unit 41.

[0072] In S1, the supply of flush water is started. That is, when the control unit 40 receives a command signal to flush the toilet sent from the remote control 4, it opens the on-off valve 15a to start the supply of flush water to the toilet 20.

[0073] In the next S2, a flush prohibition time (first predetermined time T1) is set. That is, the control unit 40 begins measuring the first predetermined time T1 (e.g., 15 seconds) from when the supply of flush water to the toilet bowl 20 begins, and then proceeds to S3. The control unit 40 also prohibits the supply of flush water to the toilet bowl 20 for the first predetermined time T1. S1 and S2 are control processes that are executed at time t1 in Figure 10.

[0074] In S3, the detection results from the detection unit are obtained over a first predetermined time T1. That is, the control unit 40 monitors the flow of flush water W flowing through the drain pipe joint 32 over the first predetermined time T1. The control unit 40 obtains the detection value V sent from the detection unit 36 over the first predetermined time T1. S3 is a control process that is executed between time t1 and time t2 in Figure 10.

[0075] In the next step S4, it is determined whether the number N of times the acquired detection value V has become equal to or greater than the first detection threshold V1 is equal to or greater than the first count threshold N1. That is, the control unit 40 measures the number N of times the amplitude of the detection value V has changed from a detection value smaller than the first detection threshold V1 to equal to or greater than the first detection threshold V1. Then, the control unit 40 determines whether the measured number N is equal to or greater than the first count threshold N1.

[0076] If S4 returns "YES," that is, if it is determined that the number N of times the acquired detection value V has exceeded the first detection threshold V1 is equal to or greater than the first count threshold N1, the process proceeds to S5. On the other hand, if S4 returns "NO," that is, if it is determined that the number N of times the acquired detection value V has exceeded the first detection threshold V1 is less than the first count threshold N1, the process proceeds to S7.

[0077] In S5, it is determined that there is "no" clogging. In other words, the control unit 40 determines that there is no clogging in the toilet 20, and proceeds to S6. In S6, the prohibition on flush water supply is lifted. In other words, the control unit 40 changes the toilet flush command signal sent from the remote control 4, which had been set to disabled, to enabled, and ends the process. S4 to S6 are control processes that are executed at time t2 in Figure 10.

[0078] In S7, it is determined that a clog "exists." In other words, the control unit 40 determines that a clog has occurred in the toilet 20, and proceeds to S8. In S8, the prohibition on the supply of flush water continues, and causes the notification unit to send a message that a clog "exists." In other words, if the control unit 40 determines in the first determination step that a clog has occurred in the toilet 20, it continues the prohibition on the supply of flush water to the toilet 20 without lifting it. This makes it possible to prevent flush water from overflowing from the toilet 20.

[0079] The control unit 40 also causes the communication unit 50 to send a clog signal indicating that a clog has occurred in the toilet bowl 20 to the notification unit 60. Upon receiving the clog signal, the notification unit 60 notifies the user that a clog has occurred in the toilet bowl 20. The notification unit 60 displays, for example, "A clog has occurred in the toilet bowl." The notification unit 60 may also display the date and time when the clog occurred. This allows the manager to identify a clogged toilet bowl 20 located away from the public toilet 1.

[0080] In the next step S9, a blockage removal confirmation control process is executed. This blockage removal confirmation control process is the second determination step executed by the control unit 40. Specific control processing of the blockage removal confirmation control process (second determination step) in S9 is shown in FIG. 12. After executing the blockage removal confirmation control process, the control unit 40 ends the process.

[0081] Next, the second determination step (clogging removal confirmation control process) executed by the control unit 40 will be described with reference to FIG.

[0082] The second predetermined time T2, second detection threshold V2, second count threshold N2, and set count La for execution of the second determination step are stored in advance in memory unit 41. Control unit 40 determines whether or not the toilet 20 has been unclogged, using the second predetermined time T2 as a single interval. The set count La is used to set the number of times the second determination step will be executed. The second predetermined time T2 and the set count La may be set in advance taking into consideration the location and environment in which the toilet 20 is installed, or may be set by an administrator.

[0083] In S11, the number of repetitions L is counted up (L = L + 1). The number of repetitions L is used to set the number of times the second determination process (control process for determining whether the clog has been cleared) is executed. If the clog in the toilet 20 has not been cleared in the second determination process, the control unit 40 moves on to the next second determination process. For example, in the first second determination process, L = 1, and in the second determination process, L = 2.

[0084] In the next step S12, a flush prohibition time (second predetermined time T2) is set. That is, the control unit 40 starts measuring the second predetermined time T2 (e.g., 20 seconds) after it is determined that the toilet 20 is clogged, and then proceeds to S13. The control unit 40 also prohibits the supply of flush water to the toilet 20 for the second predetermined time T2. S11 and S12 are control processes that are executed at time t2 in Figure 10.

[0085] In S13, the detection results from the detection unit are obtained over a second predetermined time T2. That is, the control unit 40 monitors the flow of flush water W flowing through the drain pipe joint 32 over the second predetermined time T2. The control unit 40 obtains the detection value V sent from the detection unit 36 over the second predetermined time T2. S13 is a control process that is executed between time t2 and time t3 in Figure 10.

[0086] In the next step S14, it is determined whether the number N of times the acquired detection value V has become equal to or greater than the second detection threshold V2 is equal to or greater than the second count threshold N2. That is, the control unit 40 measures the number N of times the amplitude of the detection value V has changed from a detection value smaller than the second detection threshold V2 to equal to or greater than the second detection threshold V2. Then, the control unit 40 determines whether the measured number N is equal to or greater than the second count threshold N2.

[0087] If S14 returns "YES," that is, if it is determined that the number N of times the acquired detection value V has exceeded the second detection threshold V2 is equal to or greater than the second count threshold N2, the process proceeds to S15. On the other hand, if S14 returns "NO," that is, if it is determined that the number N of times the acquired detection value V has exceeded the second detection threshold V2 is less than the second count threshold N2, the process proceeds to S18.

[0088] In S15, it is determined that there is "no clog." In other words, control unit 40 determines that the clog in toilet 20 has been cleared, and proceeds to S16. In S16, it causes the notification unit to transmit a "no clog" signal. In other words, if control unit 40 determines in the first determination step that a clog has occurred in toilet 20 and then that the clog has been cleared, it causes communication unit 50 to transmit a clog release signal to notification unit 60.

[0089] When the notification unit 60 receives the clog release signal, it cancels the notification of a clog in the toilet 20. For example, the notification unit 60 erases the display of "Toilet clogged." The notification unit 60 may also display, for example, "Toilet clog cleared." The notification unit 60 may also display the date and time when the clog was cleared. This allows the manager to know which toilet 20 has been cleared from a location away from the public toilet 1.

[0090] In S17, the prohibition on flush water supply is lifted. In other words, the control unit 40 changes the toilet flush command signal sent from the remote control 4, which had been set to disabled, to enabled, and ends the process. The control unit 40 also resets the number of repetitions L. S14 to S17 are control processes that are executed at time t3 in Figure 10. This makes it possible to automatically return the toilet 20 to a usable state, for example, if the blockage has cleared naturally. Therefore, the toilet system 100 can be made easy to use.

[0091] In S18, it is determined whether the number of repetitions L is the set number of times La. That is, the control unit 40 compares the set number of repetitions La stored in the memory unit 41 with the number of repetitions L, and determines whether or not to end the control processing of the second determination step. The control unit 40 monitors whether or not the clog in the toilet 20 has been cleared, using the second predetermined time T2 x the set number of times La as the maximum elapsed time since the clog occurred in the toilet 20.

[0092] If S18 returns "YES," that is, if it is determined that the number of repetitions L has reached the set number of times La, the process proceeds to S19. On the other hand, if S18 returns "NO," that is, if it is determined that the number of repetitions L is equal to or less than the set number of times La, the process returns to S11 and proceeds to the next second determination step.

[0093] In S19, it is determined that a clog "exists." That is, if the clog in toilet 20 has not been cleared even after executing the second determination step a set number of times, for example, La times, control unit 40 determines that a clog "exists" and proceeds to S20.

[0094] In S20, the prohibition on the supply of flush water continues, and a message that a clog is present is sent to the notification unit. That is, if the control unit 40 determines that a clog has occurred in the toilet 20, even after the second determination step has been performed a set number La of times, it continues the prohibition on the supply of flush water to the toilet 20 without lifting it. This makes it possible to prevent flush water from overflowing from the toilet 20.

[0095] Furthermore, control unit 40 causes the notification unit to transmit a clog "present" to the notification unit. That is, if control unit 40 determines that a clog has occurred in toilet 20 even after the second determination step has been performed a set number La of times, it causes communication unit 50 to transmit a clog signal to notification unit 60, and ends the process. Control unit 40 also resets the number of repetitions L. S14 to S20 are control processes that are executed at time t3 in Figure 10.

[0096] When the notification unit 60 receives a clog signal, it notifies the user that a clog has occurred in the toilet 20. The notification unit 60 continues to display, for example, "Toilet clogged," as was done in the first determination step (S8 in FIG. 11). In this case, the notification unit 60 may issue a different notification from the one done in the first determination step (S8 in FIG. 11). The notification unit 60 may also display, for example, "Toilet clogged for a long period of time" or "Toilet unusable." The notification unit 60 may also display the amount of time that has passed since the clog occurred. This allows the manager to know which toilet 20 is unusable in a location away from the public toilet 1.

[0097] FIG. 13 is a flowchart showing the cleaning prohibition canceling process executed by the control unit when a cleaning prohibition canceling operation is performed. The control process shown in FIG.

[0098] For example, when a cleaner clears a blockage in toilet 20, there is a possibility that detection value V of detection unit 36 will fall below second detection threshold V2. In such a case, the cleaner can operate release switch 45 to forcibly release the prohibition on flush water supply.

[0099] In S21 in Fig. 13, it is determined whether or not a wash prohibition release signal has been received. That is, the control unit 40 determines whether or not the release switch 45 has been operated. If it is determined that "YES" in S21, that is, that a wash prohibition release signal has been received, the process proceeds to S22. On the other hand, if it is determined that "NO" in S21, that is, that a wash prohibition release signal has not been received, the process ends.

[0100] In S22, the control unit 40 causes the communication unit 50 to transmit a clog release signal to the notification unit 60 when the release switch 45 is operated.

[0101] When the notification unit 60 receives the clog release signal, it cancels the notification of a clog in the toilet 20. For example, the notification unit 60 erases the display of "Clog in toilet." The notification unit 60 may also display, for example, "Clog in toilet cleared" or "Cleaning of toilet completed." The notification unit 60 may also display the date and time when the clog was cleared. This allows the manager to know which toilet 20 has been cleared from a location away from the public toilet 1.

[0102] In S23, the prohibition on flush water supply is lifted. In other words, the control unit 40 changes the toilet flush command signal sent from the remote control 4, which had been set to disabled, to enabled, and the process ends. This allows the toilet 20 to be returned to a usable state. This makes it possible to provide a toilet system 100 that is easy to use.

[0103] The toilet system 100 is equipped with a detection unit 36 that can detect the flow of flush water discharged from the toilet 20, and a control unit 40 that determines whether the toilet 20 is clogged based on the detection results of the detection unit 36. The control unit 40 executes a first determination step in which it determines whether a clog has occurred in the toilet 20 when a first predetermined time T1 has elapsed since the supply of flush water to the toilet 20 began, and a second determination step in which it determines whether the clog has occurred in the toilet 20 after the first determination step. If it is determined that a clog has occurred in the toilet 20, the control unit 40 prohibits the supply of flush water to the toilet 20.

[0104] This increases the accuracy of detecting a clog in the toilet 20. Furthermore, because flush water is prohibited from being supplied to a clogged toilet 20, flush water can be prevented from overflowing from the toilet 20.

[0105] Furthermore, in a first determination step, the control unit 40 determines whether or not a clog has occurred in the toilet 20 based on the amplitude of the voltage value V detected by the detection unit 36 during the period until a first predetermined time T1 has elapsed, and in a second determination step, it determines whether or not the clog has been cleared in the toilet 20 based on the amplitude of the voltage value V detected by the detection unit 36 during the period until a second predetermined time T2 has elapsed. This makes it possible to improve the accuracy of clog determination with a simple configuration.

[0106] The control unit 40 also prohibits the supply of flush water to the toilet 20 during the first predetermined time T1. If it is determined in the first determination step that no blockage has occurred in the toilet 20, the control unit 40 lifts the prohibition on the supply of flush water to the toilet 20, and if it is determined in the first determination step that a blockage has occurred in the toilet 20, the control unit 40 continues the prohibition on the supply of flush water to the toilet 20 in the second determination step. If it is determined in the second determination step that the blockage in the toilet 20 has been cleared, the control unit 40 lifts the prohibition on the supply of flush water to the toilet 20.

[0107] As a result, re-flushing is performed when a clog has occurred in the toilet 20, thereby preventing flush water from overflowing from the toilet 20. Furthermore, when the clog in the toilet 20 is cleared, the prohibition on flush water supply is lifted, improving usability for users.

[0108] The toilet system 100 also includes an alarm unit 60 that notifies the user that a clog has occurred in the toilet bowl 20. When the control unit 40 determines that a clog has occurred in the toilet bowl 20, it causes the alarm unit 60 to notify the user that a clog has occurred. When the control unit 40 determines that the clog has been cleared in the toilet bowl 20, it causes the alarm unit 60 to stop notifying the user of the clog.

[0109] This allows the manager or the like to be notified quickly of the possibility of a clog in the toilet 20. Furthermore, when the clog in the toilet 20 is cleared, the clog notification is canceled, thereby reducing unnecessary notifications.

[0110] Next, a control process according to a modified example of the present invention will be described with reference to Figures 14 and 15. In this modified example, after a clog has occurred in toilet bowl 20 in the first determination step, a wait-and-see control process is carried out without prohibiting the supply of flush water. FIG. 14 is a flowchart showing the clogging determination control executed by the control unit according to a modified example of the present invention. FIG. 15 is a flowchart showing the wait-and-see control process in FIG.

[0111] In S1 to S7 and S9 in Fig. 14, the same control processing is executed as in S1 to S7 and S9 in Fig. 11. In the modified example, if it is determined in S7 that a clog is present (i.e., if it is determined in the first determination step that a clog has occurred in the toilet bowl 20), the process moves to a wait-and-see control processing (Fig. 15).

[0112] At S30, a wait-and-see control process is executed. This wait-and-see control process is a third determination step executed by the control unit 40. Specific control processing of the wait-and-see control process (third determination step) at S30 is shown in FIG.

[0113] If S30 returns "YES," i.e., if the wait-and-see control process determines that the blockage has been cleared, the process ends. On the other hand, if S30 returns "NO," i.e., if the wait-and-see control process determines that the blockage has not been cleared, the process proceeds to the blockage clearance confirmation control process (S9).

[0114] Next, the wait-and-see control process (third determination step) executed by the control unit 40 will be described with reference to Fig. 15. S34 to S36 in Fig. 15 constitute the third determination step.

[0115] In S31, the prohibition on flush water supply is lifted. Also, a clog "is present" is sent to the notification unit. In other words, even if it is determined that a clog has occurred in toilet 20, control unit 40 changes the toilet flush command signal sent from remote control 4, which was set to disabled in S2 in Figure 11, to enabled after the first predetermined time T1 has elapsed.

[0116] The control unit 40 also transmits to the notification unit that a clog has occurred in the toilet bowl 20. In this case, the notification unit 60 displays, for example, "A clog has occurred in the toilet bowl, but flush water can be supplied." The notification unit 60 may also display the date and time when the clog occurred. This allows the manager to know which toilet bowls 20 are clogged in locations away from the public toilet 1, but for which the supply of flush water is not prohibited.

[0117] If the notification unit 60 is a display unit provided in the toilet bowl 20 or toilet room TR, it can let the manager (cleaner) or user know that a toilet bowl 20 is clogged but the supply of flush water is not prohibited. In this case, for example, a clog in the toilet bowl 20 can be visually confirmed, so the notification unit 60 may only display that flush water can be supplied. Note that in S31, the control unit 40 does not have to send to the notification unit that a clog has occurred in the toilet bowl 20 or that flush water can be supplied.

[0118] In the next step, S32, it is determined whether or not a clog clearing waveform is present. In other words, the control unit 40 monitors whether or not the clog in the toilet 20 has cleared naturally. This clog clearing waveform is, for example, the waveform in the second determination step shown in FIG. 10. In S32, the control unit 40 executes control processing similar to S12 to S14 in FIG. 12 to determine whether or not the clog in the toilet 20 has cleared naturally. Then, if S32 returns "YES," meaning that a clog clearing waveform is present, the process proceeds to S33. On the other hand, if S32 returns "NO," meaning that a clog clearing waveform is not present, the process proceeds to S34.

[0119] In S33, it is determined that the clog has been cleared. Also, a "no clog" is sent to the notification unit. In other words, if the clog clearing waveform is confirmed, the control unit 40 determines that the clog in the toilet 20 has been cleared. As a result, S30 in FIG. 14 becomes "YES." If the clog is naturally cleared, the control unit 40 returns to the clog determination control (normal state) shown in FIG. 11, and monitors for the reception of a command signal to flush the toilet.

[0120] When the notification unit 60 receives the clog release signal, it cancels the notification of a clog in the toilet 20. For example, the notification unit 60 erases the display that reads, "Toilet clogged, flush water supply possible." The notification unit 60 may also display, for example, "Toilet clog cleared." The notification unit 60 may also display the date and time the clog was cleared. This allows the manager and users to know which toilet 20 has been cleared.

[0121] In S34, it is determined whether flush water supply has started. In other words, the control unit 40 determines whether a toilet flush command signal has been received. The toilet flush command signal is sent from the remote control 4 to the toilet 20 based on the toilet flush operation performed by the remote control 4. In this way, the wait-and-see control process is designed so that even if a clog occurs in the toilet 20 in the first determination step, the reception of a toilet flush command signal is not immediately prohibited.

[0122] Then, when the control unit 40 receives a command signal to flush the toilet transmitted from the remote control 4, it opens the on-off valve 15a to begin supplying flush water W to the toilet 20. The control unit 40 also prohibits the supply of flush water for a third predetermined time period from when the command signal to operate the toilet flush is received or when the on-off valve 15a is opened. The third predetermined time period may be the same as the first predetermined time period T1 and the second predetermined time period T2, or it may be a longer period. The third predetermined time period is stored in the memory unit 41. Furthermore, the control unit 40 counts the number of times the command signal to flush the toilet is received, and stores the total number of times it is received in the memory unit 41.

[0123] If S34 returns "YES", meaning that flush water supply has started, the process proceeds to S35. On the other hand, if S34 returns "NO", meaning that flush water supply has not started, the process returns to S32 and monitors for spontaneous clearing of the clog and receipt of a command signal to flush the toilet.

[0124] In S35, it is determined whether or not a clog clearing waveform is present. In other words, the control unit 40 determines whether or not a clog has been cleared when flush water W is supplied to the toilet 20. The control unit 40 monitors the flow of flush water W within a third predetermined time period from, for example, when a command signal to operate the toilet flush is received, or when the on-off valve 15a is opened. The control unit 40 prohibits the supply of flush water to the toilet 20 during the third predetermined time. In other words, even if the control unit 40 receives a command signal to flush the toilet sent from the remote control 4 during the third predetermined time, it invalidates the command signal. After the third predetermined time has elapsed, the control unit 40 changes the command signal to flush the toilet sent from the remote control 4 to valid.

[0125] When additional flush water W is supplied to a clogged toilet 20, the flush water W accumulates in the bowl 21. As a result, for example, toilet paper or the like that is causing the clog may be pushed out by the flush water W, clearing the clog in the toilet 20. This clog clearing waveform may be, for example, the waveform in the second determination step shown in Figure 10. The control unit 40 determines whether the clog in the toilet 20 has been cleared by executing control processing similar to S12 to S14 in Figure 12, for example, in S35. Note that the control unit 40 may determine whether the clog has been cleared using thresholds different from the second detection threshold V2 and second count threshold N2 in S14 in Figure 12.

[0126] If S35 returns "YES," that is, if it is determined that a blockage removal waveform is present, the process proceeds to S33. On the other hand, if S35 returns "NO," that is, if it is determined that a blockage removal waveform is not present, the process proceeds to S36.

[0127] In S36, it is determined whether the number of times flush water supply has started is a predetermined number or more. In other words, the control unit 40 determines how many times a command signal to flush the toilet has been received during the wait-and-see control processing. This predetermined number is set to one or more times (for example, two or three times), and is stored in advance in the memory unit 41.

[0128] The predetermined number of times is set, for example, based on the capacity of the bowl section 21 of the toilet 20. For example, if the capacity of the bowl section 21 is such that it can store flush water W supplied twice, then the predetermined number of times is set to one. This makes it possible for the toilet 20 to prevent flush water W from overflowing from the toilet 20 when flush water W is supplied in the wait-and-see control process (third determination step). Note that even if a clog has occurred in the toilet 20, flush water W may flow little by little into the drain pipe 17. Therefore, the predetermined number of times does not have to be set based on the capacity of the bowl section 21. The predetermined number of times may also be changeable at will by the manager.

[0129] Then, if S36 returns "YES," that is, if it is determined that the number of times flush water supply has started is equal to or greater than the predetermined number, it is determined that the toilet 20 cannot be cleared of clog by additional supply of flush water W. As a result, S30 in Figure 14 returns "NO." That is, the control unit 40 moves to clog elimination confirmation control processing (second determination step). On the other hand, if S36 returns "NO," that is, if it is determined that the number of times flush water supply has started is less than the predetermined number, the process returns to S32 and monitors for spontaneous clearing of the clog and receipt of a command signal to flush the toilet.

[0130] In this way, in the modified example, even if it is determined in the first determination step that a clog "exists," the prohibition of the supply of flush water to the toilet 20 is temporarily suspended. In other words, the control unit 40 postpones the prohibition of the supply of flush water if a clog occurs in the toilet 20. In other words, the prohibition of the supply of flush water is carried out if flush water has been supplied multiple times and it has been determined multiple times that a clog "exists."

[0131] This allows the manager or user to clear the clog by supplying flush water W to the clogged toilet 20. Therefore, with this toilet system, the clogged toilet 20 is not immediately rendered unusable, improving usability.

[0132] In the above-described embodiment, an example was given of a case in which the supply of flush water was prohibited for a clogged toilet 20. However, the present invention is not limited to this, and for example, when a clog occurs in the toilet 20, the supply of flush water does not have to be prohibited.

[0133] It is thought that a manager or user will recognize that a clog has occurred in the toilet 20 through the notification unit 60, and by checking the situation inside the bowl 21, will not supply flush water W. Therefore, when a clog occurs in the toilet 20, the notification unit 60 may only notify that a clog has occurred. This makes it possible to indirectly prevent flush water W from overflowing from the clogged toilet 20.

[0134] Embodiments may include the following features. (Configuration 1) a detection unit capable of detecting the flow of flush water discharged from the toilet; a control unit that determines whether the toilet is clogged based on the detection result of the detection unit; Equipped with The control unit a first determination step of determining whether or not a clog has occurred in the toilet bowl when a first predetermined time has elapsed since the supply of flush water to the toilet bowl began; a second determination step of determining whether or not the clog in the toilet has been cleared after it has been determined in the first determination step that a clog has occurred in the toilet; Run A toilet system characterized in that, when it is determined that a clog has occurred in the toilet bowl, the supply of flush water to the toilet bowl is prohibited. (Configuration 2) The control unit In the first determination step, it is determined whether or not a clog has occurred in the toilet bowl based on the amplitude of the voltage value detected by the detection unit during a period until a first predetermined time has elapsed; In the second determination step, it is determined whether the toilet has been unclogged based on the amplitude of the voltage value detected by the detection unit during a period until a second predetermined time has elapsed. 2. The toilet system according to claim 1, (Configuration 3) The control unit Prohibiting the supply of flush water to the toilet bowl during the first predetermined time period; If it is determined in the first determination step that no clogging has occurred in the toilet bowl, the prohibition on supplying flush water to the toilet bowl is lifted, If it is determined in the first determination step that a clog has occurred in the toilet bowl, the prohibition of supplying flush water to the toilet bowl continues in the second determination step, If it is determined in the second determination step that the clog in the toilet has been cleared, the prohibition on supplying flush water to the toilet is lifted. 3. The toilet system according to claim 1 or 2. (Configuration 4) Further provided is an alarm unit that notifies that a clog has occurred in the toilet bowl, The control unit When it is determined that a clog has occurred in the toilet bowl, the notification unit notifies the user that a clog has occurred; When it is determined that the clog in the toilet bowl has been cleared, the notification of the clog by the notification unit is cancelled. 4. The toilet system according to any one of configurations 1 to 3. (Configuration 5) The control unit After it is determined in the first determination step that a clog has occurred in the toilet, a third determination step is carried out in which it is determined whether the clog has been cleared in the toilet without prohibiting the supply of flush water to the toilet, When it is determined in the third determination step that the toilet is clogged a predetermined number of times or more, the second determination step is executed. 5. The toilet system according to any one of configurations 1 to 4.

[0135] The above describes embodiments of the present invention. However, the present invention is not limited to these descriptions. Design modifications made by a person skilled in the art to the above-described embodiments are also included within the scope of the present invention as long as they incorporate the features of the present invention. For example, the shape, dimensions, materials, arrangement, installation form, etc. of each element of the toilet system are not limited to those exemplified and can be modified as appropriate. Furthermore, the elements of each of the above-described embodiments can be combined to the extent technically possible, and such combinations are also included within the scope of the present invention as long as they incorporate the features of the present invention. [Explanation of symbols]

[0136] 1. Public toilets 2. Hand washing area 3 Hand dryer 4 Remote Control 10 Cabinet 11 Front part 11a opening 15 Supply pipeline 15a On-off valve 17 Drainage pipeline 17a Merging pipeline 17b Connecting pipe 20 Toilet bowl 20a top surface 21 Bowl section 21a bottom 23 Supply port 25 Drain 30 Drainage socket 31 Drainage pipe joint unit 32 Drainage pipe fittings 33 First connecting pipe 33a opening 33b upper part 34 Second connecting pipe 36 Detector 40 Control Unit 41 Storage section 45 Release switch 50 Communications Department 60 Information Department 100 Toilet System TR Toilet Room P Radio waves W Cleaning water W1 Water surface

Claims

1. a detection unit capable of detecting the flow of flush water discharged from the toilet; a control unit that determines whether the toilet is clogged based on the detection result of the detection unit; Equipped with The control unit a first determination step of determining whether or not a clog has occurred in the toilet bowl when a first predetermined time has elapsed since the supply of flush water to the toilet bowl began; a second determination step of determining whether or not the clog in the toilet has been cleared after it has been determined in the first determination step that a clog has occurred in the toilet; Run A toilet system characterized in that, when it is determined that a clog has occurred in the toilet bowl, the supply of flush water to the toilet bowl is prohibited.

2. The control unit In the first determination step, it is determined whether or not a clog has occurred in the toilet bowl based on the amplitude of the voltage value detected by the detection unit during a period until a first predetermined time has elapsed; In the second determination step, it is determined whether the toilet has been unclogged based on the amplitude of the voltage value detected by the detection unit during a period until a second predetermined time has elapsed.

2. The toilet system of claim 1.

3. The control unit prohibiting the supply of flush water to the toilet bowl during the first predetermined time; If it is determined in the first determination step that no clogging has occurred in the toilet bowl, the prohibition on supplying flush water to the toilet bowl is lifted, If it is determined in the first determination step that a clog has occurred in the toilet bowl, the prohibition of supplying flush water to the toilet bowl continues in the second determination step, If it is determined in the second determination step that the clog in the toilet has been cleared, the prohibition on supplying flush water to the toilet is lifted.

2. The toilet system of claim 1.

4. Further provided is an alarm unit that notifies that a clog has occurred in the toilet bowl, The control unit When it is determined that a clog has occurred in the toilet bowl, the notification unit notifies the user that a clog has occurred; When it is determined that the clog in the toilet bowl has been cleared, the notification of the clog by the notification unit is cancelled.

2. The toilet system of claim 1.

5. The control unit After it is determined in the first determination step that a clog has occurred in the toilet bowl, a third determination step is carried out to determine whether or not the clog in the toilet bowl has been cleared without prohibiting the supply of flush water to the toilet bowl; When it is determined in the third determination step that a clog has occurred in the toilet bowl a predetermined number of times or more, the second determination step is executed.

2. The toilet system of claim 1.

Images