Toilet system

Abstract

To provide a toilet system capable of coping with elimination of clogging in an early stage.SOLUTION: The toilet system 100 includes the detector 38 that detects the flow of the flush water discharged from the flush toilet 20, and the controller 40 that determines the partially clogged state in which the flush toilet 20 is partially clogged based on the detection result of the detector 38.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a toilet system. [Background technology]

[0002] Conventionally, techniques capable of detecting clogged toilets have been known.

[0003] For example, Patent Document 1 describes a technique for detecting a clog in a toilet and stopping the supply of flush water to the toilet. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-066890 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the technology described in Patent Document 1, measures are taken to clear the clog after detecting that the toilet is clogged, so it may take a long time to clear the clog.

[0006] In view of the above problems, an object of the present invention is to provide a toilet system that is capable of quickly taking action to clear a clog. [Means for solving the problem]

[0007] To solve the above problems, according to a first aspect of the present invention, there is provided the following toilet system: This toilet system comprises a detection unit that detects the flow of flush water discharged from a toilet bowl, and a control unit that determines a partial clog state in which the toilet bowl is partially clogged based on the detection result of the detection unit.

[0008] According to this configuration, by determining that the toilet is in a partial clog state, it is possible to predict a future clog state before the toilet becomes completely clogged, and it is possible to take action to clear the clog earlier than when the partial clog state is not determined.

[0009] Furthermore, in the toilet system according to the second aspect of the present invention, the partially clogged state is distinguished from a clogged state in which the toilet bowl is clogged, and a normal state in which the toilet bowl is not clogged.

[0010] With this configuration, the drainage state of the toilet can be grasped more accurately compared to when the normal state and the clogged state are not distinguished from the partially clogged state.

[0011] In addition, in the toilet system according to the third aspect of the present invention, the control unit can distinguish between a plurality of states and determine whether the partial clog state is closer to the clog state or the normal state.

[0012] With this configuration, it is possible to estimate the possibility of "clogging" more accurately than in a case where the partial clogging state is not distinguished into multiple states, and it is possible to more appropriately manage the flushing of the toilet.

[0013] Furthermore, in the toilet system according to a fourth aspect of the present invention, the control section determines the partial clog state based on information about the flow rate of flush water detected by the detection section.

[0014] According to this configuration, it is possible to determine the partial blockage state more accurately than when determining the partial blockage state without using information on the flow velocity.

[0015] Furthermore, in the toilet system according to a fifth aspect of the present invention, the control unit determines the partial clog state based on information about the flush water level detected by the detection unit.

[0016] According to this configuration, it is possible to determine the partial blockage state more accurately than when determining the partial blockage state without using water level information.

[0017] In addition, in the toilet system according to a sixth aspect of the present invention, the control unit transmits the determined partial clog state to a notification unit that is capable of notifying the partial clog state.

[0018] With this configuration, a manager or the like can be notified of a partial blockage state, enabling appropriate flushing management of the toilet.

[0019] In addition, in the toilet system according to the seventh aspect of the present invention, the notification section notifies the partial clog state in priority over other notification items.

[0020] With this configuration, it is possible to give priority to informing the manager or the like of a partial blockage state, and more appropriate flushing management of the toilet is possible.

[0021] In addition, in the toilet system according to the eighth aspect of the present invention, the detection unit is provided in the drain pipe joint, the bowl unit, the trap unit, or the drain pipe line.

[0022] According to this configuration, by providing the detection section at a location where the flow of cleaning water can be easily detected, the flow of cleaning water can be detected with greater accuracy.

[0023] In addition, in the toilet system according to a ninth aspect of the present invention, the detection unit is a radio wave sensor.

[0024] With this configuration, radio waves are easily reflected by water, making it possible to measure the state of the wash water with greater accuracy.

[0025] In addition, in the toilet system according to a tenth aspect of the present invention, the control unit compares the voltage value detected by the detection unit with a predetermined threshold value to determine the partial clog state.

[0026] According to this configuration, it is possible to more accurately determine the partial blockage state.

[0027] In addition, in the toilet system according to the eleventh aspect of the present invention, the control unit has a frequency analysis means capable of frequency analyzing the detection results of the detection unit, and the control unit compares the spectral intensity of a predetermined frequency range in the frequency analysis results with a predetermined threshold value to determine the partial blockage state.

[0028] According to this configuration, it is possible to more accurately determine the partial blockage state. [Effects of the Invention]

[0029] According to the toilet system of the present invention, it is possible to take measures to clear the blockage early. [Brief explanation of the drawings]

[0030] [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] FIG. 1 is a side cross-sectional view of the cabinet, toilet bowl, drain pipe joint unit, and drain pipe line, and a view of the toilet system. [Figure 3] FIG. 1 is a perspective view showing a drain socket and a drain pipe line; [Figure 4] FIG. 10 is a diagram showing the range in which the detection unit can be attached. [Figure 5] FIG. 10 is a diagram showing a state in which cleaning water flows. [Figure 6] 4 is a diagram showing a change over time in a detected value (voltage value) detected by a detection unit. FIG. [Figure 7] 7 is a diagram showing the results of FFT processing performed on the detection results at the first predetermined time shown in FIG. 6. FIG. [Figure 8] 10 is a flowchart illustrating an example of control of clogging determination executed by a control unit. [Figure 9] 10 is a flowchart illustrating an example of notification of a clogging determination executed by a control unit. DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. To facilitate understanding of the description, the same components in the drawings will be denoted by the same reference numerals as much as possible, and duplicated descriptions will be omitted.

[0032] ---Embodiment --- First, the toilet system according to this embodiment will be described.

[0033] <Overall structure> FIG. 1 is a plan view showing a public toilet equipped with a toilet system according to an embodiment of the present invention.

[0034] 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 house or the like.

[0035] The cabinet 10 is mounted on a wall or floor within the toilet room. The toilet bowl 20 is attached to the front of the cabinet 10. In this specification, "up," "down," "front," "rear," "left," and "right" refer to directions seen from the perspective of a user seated on the toilet bowl 20 with their back to the cabinet 10.

[0036] The drain pipe 16 extends horizontally within the cabinet 10. The drain pipe 16 is connected to each of the drain pipe fitting units 32 connected to the plurality of toilet bowls 20 of the public toilet 1. The drain pipe 16 drains flush water and waste discharged from each toilet bowl 20 into a sewer.

[0037] The remote control 4 is provided on the wall of the toilet room TR. The remote control 4 is operated by a user or cleaner of the toilet room TR to perform, for example, flushing operations of the toilet bowl 20.

[0038] FIG. 2 is a cross-sectional side view of the cabinet 10, toilet bowl 20, drain pipe joint unit 32, and drain pipe 16, and a diagram showing the toilet system 100.

[0039] As shown in Figure 2, an opening 12a is provided in the front panel 12 of the cabinet 10, penetrating in the front-to-rear direction. This opening 12a is provided to correspond to the toilet bowl 20. Inside the cabinet 10, a supply pipe 14, a drain pipe 16, a drain socket 30, and cables (not shown) are arranged.

[0040] The toilet 20 is a so-called seated toilet, and has a concave bowl portion 22 that is recessed downward from the upper surface 20a. A toilet seat on which a user sits is provided on the upper surface 20a of the toilet 20. The toilet 20 collects excrement such as urine and feces from the user in the bowl portion 22.

[0041] The toilet bowl 20 is attached to the front panel 12 of the cabinet 10 at a position corresponding to the opening 12a. The toilet bowl 20 is attached to the cabinet 10 with a gap formed between it and the floor.

[0042] The rear surface of the toilet bowl 20 is provided with a supply port 24 to which the supply pipe 14 is connected, and a drain port 26 to which a drain pipe fitting 33 is connected. The supply port 24 is located on the top surface 20a of the toilet bowl 20. The drain port 26 is located below the supply port 24 and opens toward the rear. The drain port 26 communicates with the trap portion 22a of the bowl portion 22. In this case, the drain port 26 is located above the trap portion 22a. As a result, flush water (seal water) collects in the trap portion 22a of the bowl portion 22 after the toilet flush is completed.

[0043] A supply pipe 14 is provided for each toilet bowl 20. The supply pipe 14 connects a water supply source (for example, a water supply system) and the toilet bowl 20. Flush water that is supplied to the toilet bowl 20 flows through the supply pipe 14. An on-off valve 14a is provided in the supply pipe 14. The on-off valve 14a is, for example, a solenoid valve, and is opened and closed by operating the remote control 4. When the on-off valve 14a is open, flush water flows from the supply pipe 14 to the toilet bowl 20.

[0044] The drain socket 30 is connected to the drain outlet 26 of the toilet 20. The drain socket 30 is cylindrical and made of, for example, a resin material. The drain socket 30 has a drain pipe joint unit 32 that is connected to the drain outlet 26.

[0045] The drain pipe fitting unit 32 is located between the toilet 20 and the drain pipe 16. The drain pipe fitting unit 32 has a drain pipe fitting 33 through which flush water flows, and a detection unit 38 provided on the drain pipe fitting 33. The drain pipe fitting 33 has a first connecting pipe 34 connected to the drain outlet 26 of the toilet 20, a second connecting pipe 36 connected to the first connecting pipe 34, and a merging pipe 16a connected to the second connecting pipe 36. In this embodiment, the merging pipe 16a is part of the drain pipe fitting 33, but it may also be part of the drain pipe 16. In this case, one end of the drain pipe fitting 33 is fixed to the drain outlet 26, and the other end is fixed to the merging pipe 16a of the drain pipe 16. Flush water discharged from one toilet 20 flows through the drain pipe fitting 33.

[0046] The first connecting pipe 34 has an opening 34a. In the drain pipe joint unit 32, the drain outlet 26 of the toilet 20 is inserted into the opening 34a of the first connecting pipe 34. The second connecting pipe 36 is a flexible member. Preferably, the second connecting pipe 36 may be a bendable bellows pipe made of a soft material. The second connecting pipe 36 absorbs the force received from flush water, waste, etc., and allows the flush water, waste, etc. to flow smoothly into the drain pipe 16. The second connecting pipe 36 may also be a drainage pipe made of a hard material.

[0047] 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 comprises a detection unit 38, a control unit 40, a communication unit 50, and a notification unit 60.

[0048] The detector 38 is provided in the drain pipe joint unit 32. The detector 38 is a radio wave sensor that detects the flow of flush water that is discharged from the toilet 20 and flows within the drain pipe joint 33. Specifically, the detector 38 is a Doppler sensor that detects the distance between the detector 38 and the waves of flush water flowing within the drain pipe joint 33, and the flow speed of the flush water waves. The detector 38 may also be provided in the toilet 20, as long as it can detect the flow of flush water that is discharged from the toilet 20. Because radio waves easily pass through resin and are easily reflected by water, by using the detector 38 as a radio wave sensor, it is possible to measure the state of the flush water with high accuracy.

[0049] By using a radio wave sensor for the detection unit 38, radio waves can be transmitted through the drain pipe joint 33. Therefore, without having to modify the existing drain pipe joint 33, the flow of flush water discharged from the toilet bowl 20 can be easily detected by the detection unit 38 simply by adhering the detection unit 38 to the drain pipe joint 33. Radio wave sensors can also be easily made smaller.

[0050] When the flow rate of flushing water flowing through the drain pipe joint 33 is high, the flow speed is fast and the waves are large. On the other hand, when the flow rate of flushing water flowing through the drain pipe joint 33 is low, the flow speed is slow and the waves are small. The detection unit 38 transmits the detected value to the control unit 40.

[0051] The detection unit 38 is provided in the first connection pipe 34 out of the first connection pipe 34 and the second connection pipe 36. The second connection pipe 36 has a bellows-shaped outer surface, making it difficult to bring the detection surface of the detection unit 38 into close contact with it. In addition, the second connection pipe 36 may vibrate significantly due to the flow of cleaning water W.

[0052] Therefore, if the detector 38 were provided on the second connecting pipe 36, there is a risk that the detection accuracy of the detector 38 would decrease. On the other hand, the first connecting pipe 34 is the part that is fixed to the drain outlet 26 of the toilet 20, and is therefore a part that is subject to little vibration. Therefore, the detector 38 is provided on the first connecting pipe 34, which is the part of the drain pipe joint 33 that is subject to little vibration.

[0053] The control unit 40 determines the drainage state of the toilet 20 based on the detection results of the detection unit 38. The drainage state may be, for example, a clogged state in which the toilet 20 is clogged, a partially clogged state in which the toilet 20 is partially clogged, or a normal state in which the toilet 20 is not clogged. The partially clogged state is a drainage state that is distinguished from the clogged state and the normal state.

[0054] The partial clog state may also be distinguished into a weak partial clog state and a strong partial clog state. A weak partial clog state is, for example, a state in which a small object such as a pen has become clogged from a normal state, or a piece of paper has begun to become clogged. A strong partial clog state is, for example, a state in which a large object has become clogged, or a weakly clogged state has become even more clogged with paper. The weak partial clog state is closer to the normal state than the strong partial clog state. Furthermore, the strong partial clog state is closer to the clogged state than the weak partial clog state. In other words, the control unit 40 can distinguish the partial clog state into multiple states and determine whether it is closer to the clogged state or the normal state. Being able to distinguish the partial clog state into multiple states makes it possible to more accurately estimate the possibility of the clog state becoming a "clogged" state and the time until the "clogged" state becomes a "clogged" state, and enables appropriate flushing management of the toilet 20.

[0055] Here, a clogged state refers to, for example, a state in which, when flush water is poured into the toilet 20, the water does not drain from the bowl portion 22, and the flush water overflows from the bowl portion 22. A severe partial clogged state refers to, for example, a state in which, when flush water is poured into the toilet 20, water is discharged from the bowl portion 22, but the water discharge speed is slow, and if flushing is performed continuously, the flush water accumulates in the bowl portion 22 and overflows. When a clog has occurred in the toilet 20, the control unit 40 may, for example, prohibit the supply of flush water to the toilet 20. The control unit 40 has a memory unit 42 in which a control processing program for determining the drainage state of the toilet 20 is stored.

[0056] The control unit 40 also has frequency analysis means that is capable of frequency analysis of the detection results of the detection unit 38. The control unit 40 also controls the opening and closing operation of the on-off valve 14a. A control program that controls the opening and closing operation of the on-off valve 14a is stored in the memory unit 42. The control unit 40 controls the opening and closing operation of the on-off valve 14a based on a command signal from a remote control 4 that is installed on the wall of the toilet room TR, for example. The control unit 40 also controls the opening and closing operation of the on-off valve 14a based on the determination result of the drainage state of 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 14a may be executed by separate control units 40.

[0057] The communication unit 50 is provided between the control unit 40 and the notification unit 60. The communication unit 50 transmits the drainage state of the toilet 20 determined by the control unit 40 to the notification unit 60.

[0058] The notification unit 60 is capable of notifying the drainage status determined by the control unit 40. The notification unit 60 may be, for example, a mobile terminal or a PC terminal of the manager who manages the public toilet 1. By checking the notification unit 60, the manager can recognize which toilet bowl 20 in the public toilet 1 is clogged. The notification unit 60 may also prioritize notifying a partial clog state over other notification items regarding the drainage status. The notification unit 60 may also be a display unit or a sound generating unit provided in the toilet bowl 20 or the toilet room TR.

[0059] FIG. 3 is a perspective view showing the drain socket 30 and the drain line 16.

[0060] As shown in FIG. 3, the detection unit 38 is provided on the upper part 34b of the first connecting pipe 34. The drainage pipe 16 also has the aforementioned merging pipe 16a and connecting pipe 16b. The merging pipe 16a is connected to the connecting pipe 16b and the second connecting pipe 36 of the drainage pipe joint 33. The merging pipe 16a extends in a direction perpendicular to the second connecting pipe 36. Connecting pipes 16b are connected to both ends of the merging pipe 16a. The merging pipe 16a may be integrated with the connecting pipe 16b of the drainage pipe 16. Flush water discharged from multiple toilets 20 flows through the merging pipe 16a.

[0061] FIG. 4 is a diagram showing a range B in which the detector 38 is attached.

[0062] 4, the upper portion 34b is located above the center in the vertical direction (the dotted line indicating 0 degrees in FIG. 4) of the first connecting pipe 34. The detecting unit 38 is preferably provided within a range B of 40 degrees or more and 140 degrees or less relative to the 0 degree dotted line.

[0063] The inner surface of range B of first connecting pipe 34 is located away from the flushing water W flowing through first connecting pipe 34, and is therefore an area where water droplets splashing from the flushing water W or wet paper are less likely to adhere. Therefore, by providing detection unit 38 within range B, it is possible to accurately detect the flow of flushing water W flowing through first connecting pipe 34. In this example, detection unit 38 is located at a position at 90 degrees from the dotted line at 0 degrees.

[0064] FIG. 5 is a diagram showing the state in which the wash water W flows.

[0065] As shown in Figure 5, detector 38 emits radio waves P towards the surface W1 of flush water W flowing at the bottom inside first connecting pipe 34. That is, detector 38 is provided in a position opposite the surface W1 of flush water W. Detector 38 detects waves on the water surface W1 by receiving radio waves reflected from the water surface W1. That is, detector 38b detects the flow of flush water W discharged from toilet bowl 20.

[0066] FIG. 6 is a diagram showing the change over time of the detection value (voltage value V) detected by the detection unit 38.

[0067] The top diagram in Fig. 6 is a diagram showing the change over time in the voltage value V detected by the detection unit 38 when the toilet 20 is in a normal, unclogged state. The second diagram in Fig. 6 is a diagram showing the change over time in the voltage value V detected by the detection unit 38 when there is a weak partial clog. The third diagram in Fig. 6 is a diagram showing the change over time in the voltage value V detected by the detection unit 38 when there is a severe partial clog. The bottom diagram in Fig. 6 is a diagram showing the change over time in the voltage value V detected by the detection unit 38 when there is a clog.

[0068] Time t1 shown in Figure 6 indicates the time when the control unit 40 receives a command signal to operate the toilet flush, or when the on-off valve 14a is opened. The control unit 40 begins measuring a first predetermined time T1 from time t1, and monitors the flow of flush water W during the period of that first predetermined time T1.

[0069] Specifically, when the supply of flush water W begins at time t1, detection unit 38 receives radio waves reflected from the surface W1 of the flush water W until time t2 after the first predetermined time T1 has elapsed. First predetermined time T1 is the time from when the supply of flush water W begins until the flush water W has finished flowing, for example, when there is no clog in the toilet bowl 20.

[0070] When no clog has occurred in the toilet 20, the waves of the flush water W flowing inside the drain pipe joint 33 become larger, and the amplitude of the detected value (voltage value V) becomes larger. The control unit 40 compares the voltage value V detected by the detection unit 38 with a first threshold value V1. The control unit 40 then counts the number of times that a voltage value V equal to or greater than the first threshold value V1 is detected in the amplitude of the voltage value V. The control unit 40 also compares the voltage value V detected by the detection unit 38 with a second threshold value V2. The control unit 40 then counts the number of times that a voltage value V equal to or greater than the second threshold value V2 is detected in the amplitude of the voltage value V.

[0071] When there is no clog in the toilet bowl 20, a large amount of flush water W flows through the first connecting pipe 34. When a large amount of flush water W flows through the first connecting pipe 34, the waves on the water surface W1 become larger, and the voltage value V detected by the detection unit 38 becomes larger. When there is a clog in the toilet bowl 20, a small amount of flush water W flows through the first connecting pipe 34. When a small amount of flush water W flows through the first connecting pipe 34, the waves on the water surface W1 become smaller, and the voltage value V detected by the detection unit 38 becomes smaller.

[0072] The aforementioned memory unit 42 stores threshold values ​​V1 and V2 for determining whether the toilet 20 is clogged.

[0073] FIG. 7 is a diagram showing the results of FFT processing performed on the detection results at the first predetermined time T1 shown in FIG.

[0074] The top diagram in Fig. 7 is a diagram showing the results of FFT processing performed on the detection results of the detection unit 38 at the first predetermined time T1 in a normal state. The second diagram in Fig. 7 is a diagram showing the results of FFT processing performed on the detection results of the detection unit 38 at the first predetermined time T1 in a weak partial clogging state. The third diagram in Fig. 7 is a diagram showing the results of FFT processing performed on the detection results of the detection unit 38 at the first predetermined time T1 in a severe partial clogging state. The bottom diagram in Fig. 7 is a diagram showing the results of FFT processing performed on the detection results of the detection unit 38 at the first predetermined time T1 in a clogging state.

[0075] Here, a method for detecting the flow of cleansing water W will be described, taking as an example a case where the detecting unit 38 is a Doppler sensor. The detection signal detected by the detecting unit 38 is proportional to the speed of an object, so when the detecting unit 38 is directed toward the water surface W1, a signal is output at a frequency according to the flow speed of the cleansing water W. In other words, the faster the flow speed of the cleansing water W, the higher the frequency of the signal that is output, and the slower the flow speed of the cleansing water W, the lower the frequency of the signal that is output.

[0076] The Doppler sensor, which transmits radio waves toward range B of first connecting pipe 34, outputs a signal with a frequency corresponding to the flow speed of the flow of flush water W. Therefore, by frequency analyzing the output of the Doppler sensor and calculating and determining the presence or absence, amount, or temporal change in flow rate of flush water W, it is possible to determine the drainage status accordingly. In other words, control unit 40 can determine the drainage status based on information about the flow speed of flush water W detected by detection unit 38.

[0077] Furthermore, frequency analysis is performed using FFT (Fast Fourier Transform), and a frequency spectrum is output. By using FFT, the frequency spectrum of the output of the Doppler sensor can be obtained in real time. The obtained frequency spectrum can be used to determine the drainage state. Alternatively, a bandpass filter that passes only signals within a specific range of frequencies may be used. The drainage state may be determined by outputting a detection signal in a specific frequency band corresponding to the flow velocity of the cleaning water W. The passband of the filter may be set to match the actual frequency distribution of the output signal of the Doppler sensor for the cleaning water W.

[0078] The Doppler sensor also outputs a signal according to the distance to the object. That is, if the detection unit 38 is installed above the first connecting pipe 34, the higher the level of the flush water W, the larger the signal that is output, and the lower the level of the flush water W, the smaller the signal that is output. The drainage status may be determined by outputting a signal corresponding to the level of the flush water W. That is, the control unit 40 can determine the drainage status based on information about the level of the flush water W detected by the detection unit 38.

[0079] 7 indicates a frequency band in which a signal corresponding to a low flow rate of cleaning water W is output. Frequency band F2 indicates a frequency band in which a signal corresponding to a high flow rate of cleaning water W is output. The control unit 40 performs FFT processing on the detection results from time t2 shown in FIG. 6 for a first predetermined time T1.

[0080] The control unit 40 compares the calculated spectral intensity E with a first threshold E1 for each of the narrower frequency bands F21, F22, ... within the frequency band F2. If the spectral intensity E is equal to or greater than the first threshold E1, the count value is increased, and if the spectral intensity E is below the first threshold E1, the count value is not increased. The control unit 40 then performs the above calculation across the entire frequency band F2 and records the count values ​​in the storage unit 42.

[0081] The control unit 40 compares the calculated spectral intensity E with a second threshold E2 for each of the narrower frequency bands F11, F12, ... within the frequency band F1. If the spectral intensity E is equal to or greater than the second threshold E2, the control unit 40 increases the count value. If the spectral intensity E is below the second threshold E2, the control unit 40 does not increase the count value. Then, the control unit 40 performs the above calculation across the entire frequency band F1 and records the count values ​​in the storage unit 42.

[0082] The aforementioned memory unit 42 stores threshold values ​​E1 and E2 for determining whether the toilet 20 is clogged. Furthermore, the detection result of the detector 38 may be amplified by an amplifier (not shown) and subjected to FFT processing.

[0083] FIG. 8 is a flowchart showing an example of the control of the clogging determination executed by the control unit 40.

[0084] In S1, the supply of flush water W begins. That is, when the control unit 40 receives a command signal to flush a toilet transmitted from the remote control 4, for example, it opens the on-off valve 14a to begin the supply of flush water W to the toilet 20.

[0085] In S2, the detection result by the detection unit 38 is acquired during a first predetermined time T1. That is, the control unit 40 monitors the flow of flush water W flowing through the drain pipe joint 33 during the first predetermined time T1. The control unit 40 acquires the voltage value V transmitted from the detection unit 38 during the first predetermined time T1. Furthermore, after the first predetermined time T1, the control unit 40 performs FFT processing on the detection result of the detection unit 38.

[0086] In S3, it is determined whether the number of times the acquired voltage value V has become equal to or greater than the first threshold value V1 is equal to or greater than a count threshold value N1. That is, the control unit 40 measures the number of times the amplitude of the voltage value V has become equal to or greater than the first threshold value V1. Then, the control unit 40 determines whether the measured number is equal to or greater than the count threshold value N1.

[0087] If S3 returns "YES," i.e., if it is determined that the number of times the acquired voltage value V has exceeded the first threshold value V1 is equal to or greater than the count threshold value N1, the process proceeds to S4. On the other hand, if S3 returns "NO," i.e., if it is determined that the number of times the acquired voltage value V has exceeded the first threshold value V1 is less than the count threshold value N1, the process proceeds to S7.

[0088] In S4, the control unit 40 determines whether the count value of the FFT processed result is equal to or greater than the count number threshold C1. That is, the control unit 40 compares the calculated spectral intensity E with the first threshold E1 for each of the narrower frequency bands F21, F22, ... within frequency band F2 over the entire frequency band F2, and measures the count value, which is the number of frequency bands where the spectral intensity E is equal to or greater than the first threshold E1. Then, the control unit 40 determines whether the count value is equal to or greater than the count number threshold C1.

[0089] If S4 returns "YES," i.e., if it is determined that the count value is equal to or greater than the count threshold C1 in frequency band F2, the process proceeds to S5. On the other hand, if S4 returns "NO," i.e., if it is determined that the count value is less than the count threshold C1 in frequency band F2, the process proceeds to S6. The determination in S4 makes it possible to determine whether the spectral intensity is high or low in a higher frequency band. In other words, S4 makes it possible to sensitively determine the drainage state of flush water W when the flow rate is faster.

[0090] In S5, the control unit 40 determines that the drainage state is normal. In other words, the control unit 40 determines that no clogging has occurred in the toilet bowl 20. Then, the series of processes ends.

[0091] In S6, the drainage state is determined to be a weak partial clog state. In other words, the control unit 40 determines that a weak partial clog has occurred, such as a state in which a small object has clogged the toilet bowl 20. Then, the series of processes ends.

[0092] In S7, it is determined whether the number of times the acquired voltage value V has become equal to or greater than the second threshold value V2 is equal to or greater than the count threshold value N2. That is, the control unit 40 measures the number of times the amplitude of the voltage value V has become equal to or greater than the second threshold value V2. Then, the control unit 40 determines whether the measured number is equal to or greater than the count threshold value N2.

[0093] If S7 returns "YES," i.e., if it is determined that the number of times the acquired voltage value V has exceeded the second threshold value V2 is equal to or greater than the count threshold value N2, the process proceeds to S8. On the other hand, if S7 returns "NO," i.e., if it is determined that the number of times the acquired voltage value V has exceeded the second threshold value V2 is less than the count threshold value N2, the process proceeds to S10.

[0094] In S8, the control unit 40 determines whether the count value of the FFT processed result is equal to or greater than the count number threshold C2. That is, the control unit 40 compares the calculated spectral intensity E with the second threshold E2 for each of the narrower frequency bands F11, F12, ... within frequency band F1 across the entire frequency band F1, and measures the count value, which is the number of frequency bands where the spectral intensity E is equal to or greater than the second threshold E2. Then, the control unit 40 determines whether the count value is equal to or greater than the count number threshold C2.

[0095] If S8 returns "YES," i.e., if it is determined that the count value is equal to or greater than the count threshold C2 in frequency band F1, the process proceeds to S9. On the other hand, if S8 returns "NO," i.e., if it is determined that the count value is less than the count threshold C2 in frequency band F1, the process proceeds to S10. The determination in S8 makes it possible to determine whether the spectral intensity is high or low in a lower frequency band. In other words, S8 can sensitively determine the drainage state of flush water W when the flow rate is slower.

[0096] In S9, the drainage state is determined to be a severe partial clog state. In other words, the control unit 40 determines that a severe partial clog has occurred, such as a state in which a large object has clogged the toilet bowl 20. Then, the series of processes ends.

[0097] In S10, the drainage state is determined to be a clogged state. In other words, the control unit 40 determines that a clog has occurred in the toilet bowl 20. Then, the series of processes ends.

[0098] In the above flowchart, an example is given of a process including steps S3 and S7 in which the voltage value V is compared with the first threshold value V1 or the second threshold value V2, and steps S4 and S8 in which the spectrum intensity E is compared with the first threshold value E1 or the second threshold value E2, but the process of determining the drainage state is not limited to the above. For example, a process may be performed in which steps S3 and S7 in which the voltage value V is compared with the first threshold value V1 or the second threshold value V2 are performed, but steps S4 and S8 are not performed, and at least a normal state, a partial clogged state, and a clogged state are distinguished and determined.

[0099] Furthermore, for example, a step S3 may be executed in which the voltage value V is compared with a first threshold value V1, and a determination may be made to distinguish at least between a normal state and a clogged state. By distinguishing between the normal state and a partially clogged state, it is possible to grasp, for example, a transition from a normal state in which paper has started to clog to a partially clogged state, or a transition from a partially clogged state to a normal state in which the clogged paper has been cleared by cleaning water W.

[0100] Alternatively, for example, S7, which is a determination in which the voltage value V is compared with the second threshold value V2, may be executed to distinguish between at least a partial clog state and a full clog state. By distinguishing between a partial clog state and a full clog state and making such a determination, it is possible to grasp, for example, a transition from a partial clog state, in which paper gradually becomes clogged and the wash water W no longer flows, to a full clog state, or a transition from a clog state in which the clogged paper begins to flow with the wash water W and the partial clog is cleared, to a partial clog state.

[0101] Furthermore, for example, S4 and S8, which are determinations in which the spectral intensity E is compared with a first threshold value E1 or a second threshold value E2, may be performed, and S3 and S7 may not be performed. An example of the processing flow in the above case will be described. For example, if S4 is first performed and the determination is "YES," the control unit 40 determines that the drainage state is normal. On the other hand, if the determination is "NO," the control unit 40 then performs the processing of S8. If S8 is performed and the determination is "YES," the control unit 40 determines that the drainage state is a partial clogged state. On the other hand, if the determination is "NO," the control unit 40 determines that the drainage state is a clogged state. Also, for example, S8, which is determination in which the spectral intensity E is compared with a second threshold value E2, may be performed, and the at least partial clogged state may be distinguished from the clogged state and determined.

[0102] Furthermore, in the above series of processes, the supply of cleaning water W may be prohibited depending on the determination of the drainage state. For example, if the control unit 40 determines that there is a clogged state or a partial clogged state, it may control and close the on-off valve 14a to prohibit the supply of cleaning water W.

[0103] FIG. 9 is a flowchart showing an example of notification of a clogging determination executed by the control unit 40.

[0104] In S21, it is determined whether the drainage state is a partial clog state. If "YES" in S21, the process proceeds to S22. On the other hand, if "NO" in S23, the process proceeds to S23.

[0105] In S22, the partial clog state is transmitted to the notification unit 60. That is, the control unit 40 causes the communication unit 50 to transmit a clog signal indicating that the toilet bowl 20 is partially clogged to the notification unit 60. When the notification unit 60 receives the clog signal, it notifies the toilet bowl 20 that a clog has occurred. The notification unit 60 displays, for example, "Toilet bowl partially clogged." The notification unit 60 may also display the date and time the clog occurred. This allows the manager to identify the clogged toilet bowl 20 from a location away from the public toilet 1. The notification unit 60 may also issue information such as "Toilet unusable" using a display or audio generation unit provided in the toilet bowl 20 or the toilet room TR. This allows the user to identify the clogged toilet bowl 20. The series of processes then ends.

[0106] In S23, it is determined whether the drainage state is clogged. If S23 is "YES", the process proceeds to S24. On the other hand, if S23 is "NO", the process ends. If S23 is "NO", a message that the drainage state is normal may be transmitted to the notification unit 60. This makes it possible to confirm, for example, that a toilet bowl 20 that was partially clogged is now in a normal state, and allows the manager to know which toilet bowl 20 has been unclogged from a location away from the public toilet 1.

[0107] In S24, the clog state is transmitted to the notification unit 60. That is, the control unit 40 causes the communication unit 50 to transmit a clog signal indicating that a clog has occurred in the toilet 20 to the notification unit 60. When the notification unit 60 receives the clog signal, it notifies the notification unit 60 that a clog has occurred in the toilet 20. The notification unit 60 displays, for example, "A clog has occurred in the toilet." The series of processes then ends.

[0108] <Action and effect> As described above, the toilet system 100 according to this embodiment comprises a detection unit 38 that detects the flow of flush water W discharged from the toilet bowl 20, and a control unit 40 that determines whether the toilet bowl 20 is in a partially clogged state based on the detection results of the detection unit 38.

[0109] According to this configuration, by determining the partial blockage state, it is possible to predict the future drainage state before the toilet 20 becomes clogged, and it is possible to take action to clear the blockage earlier than when the partial blockage state is not determined.

[0110] Furthermore, in the toilet system 100, the partially clogged state is distinguished from a clogged state in which the toilet bowl 20 is clogged, and a normal state in which the toilet bowl 20 is not clogged.

[0111] With this configuration, the drainage state of the toilet 20 can be grasped more accurately than when the partial clog state cannot be distinguished from the clog state and the normal state.

[0112] Furthermore, in the toilet system 100, the control unit 40 can distinguish a partial clog state into a plurality of states and determine whether the state is closer to a clog state or a normal state.

[0113] With this configuration, it is possible to estimate the possibility of a clogged state more accurately than when the partial clogged state is not distinguished into multiple states, and it is possible to more appropriately manage the flushing of the toilet 20.

[0114] Furthermore, in the toilet system 100, the control unit 40 determines whether a partial blockage state is present based on information about the flow rate of the flush water W detected by the detection unit .

[0115] According to this configuration, it is possible to determine the partial blockage state more accurately than when determining the partial blockage state without using information on the flow velocity.

[0116] Furthermore, in the toilet system 100, the control unit 40 determines whether a partial blockage state is occurring based on information about the level of the flush water W detected by the detection unit .

[0117] According to this configuration, it is possible to determine the partial blockage state more accurately than when determining the partial blockage state without using water level information.

[0118] Furthermore, in the toilet system 100, the control unit 40 transmits the determined partial clog state to the notification unit 60, which is capable of notifying the partial clog state.

[0119] According to this configuration, it is possible to notify the manager or the like of a partial blockage state, and the flushing of the toilet 20 can be managed appropriately.

[0120] Furthermore, in the toilet system 100, the notification unit 60 notifies the partial clog state in priority over other notification items.

[0121] According to this configuration, it is possible to give priority to informing the manager or the like of a partial blockage state, and more appropriate flushing management of the toilet 20 is possible.

[0122] In addition, in the toilet system 100, the detection unit 38 is provided in the drain pipe joint 33, the bowl portion 22, the trap portion 22a, or the drain pipe line 16.

[0123] According to this configuration, by providing the detector 38 at a location where the flow of the cleaning water W can be easily detected, the flow of the cleaning water W can be detected with greater accuracy.

[0124] In the toilet system 100, the detection unit 38 is a radio wave sensor.

[0125] According to this configuration, the radio waves P are easily reflected by water, so the state of the wash water W can be measured with greater accuracy.

[0126] Furthermore, in the toilet system 100, the control unit 40 compares the voltage value V detected by the detection unit 38 with a predetermined threshold value to determine whether the toilet is in a partially clogged state.

[0127] According to this configuration, it is possible to more accurately determine the partial blockage state.

[0128] In addition, in the toilet system 100, the control unit 40 has a frequency analysis means capable of frequency analyzing the detection results of the detection unit 38, and the control unit 40 compares the spectral intensity E of a predetermined frequency range in the frequency analysis results with a predetermined threshold value to determine a partial blockage state.

[0129] According to this configuration, it is possible to more accurately determine the partial blockage state.

[0130] ---Variations--- The present invention is not limited to the above-described embodiments. In other words, designs that are produced by those skilled in the art with appropriate design modifications to the above-described specific examples are also included within the scope of the present invention as long as they include the features of the present invention. Furthermore, the elements of the above-described embodiments and the following modifications 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 include the features of the present invention.

[0131] For example, the detection unit 38 may be a vibration sensor that detects vibration components based on the flow of flush water W flowing inside the drain pipe joint 33, a flow sensor that detects the flow of flush water W from the amount of movement of a string-like member extending inside the drain pipe joint 33, an infrared sensor that detects the distance to the water surface W1 from the difference in the amount of scattering depending on whether water is present or not, or an electrostatic sensor that detects the water level state inside the drain pipe joint 33 from changes in capacitance. The detection unit 38 may also be a pressure sensor that is grounded to the bottom surface of the drain pipe joint 33 and detects the water level state inside the piping from changes in pressure.

[0132] Furthermore, in the present embodiment, the partial clog state is categorized into two states, a weak partial clog state and a strong partial clog state, as an example. However, the partial clog state may be categorized into three or more states. For example, a threshold value V3 different from the threshold values ​​V1 and V2, or a threshold value E3 different from the threshold values ​​E1 and E2, may be set. The control unit 40 may then compare these threshold values ​​with the voltage value V or the spectral intensity E to determine whether the partial clog state is categorized into three or more states. The partial clog state may be categorized, for example, by the water discharge rate, or by whether or not water overflows during continuous flushing. Alternatively, the partial clog state may be categorized based on the cause of the clog estimated from the measured waveform.

[0133] In addition, in this embodiment, the FFT calculation period is set to the first predetermined time T1, but the calculation cycle may be shorter. By shortening the calculation cycle, it becomes possible to capture changes in flow rate more accurately. Conversely, by lengthening the FFT calculation period, it becomes possible to slow down the calculation speed, that is, to achieve a less expensive configuration.

[0134] Furthermore, in this embodiment, an example was given of a configuration in which the drainage state of the toilet 20 is determined from the voltage value V output from the Doppler sensor and the results of frequency analysis, but the present invention is not limited to this. For example, the drainage state of the toilet 20 may be determined based on information about the flow speed of the flush water W acquired by a flow sensor that detects the flow of the flush water W from the amount of movement of a string-shaped member. Alternatively, the drainage state of the toilet 20 may be determined based on information about the water level of the flush water W acquired by an infrared sensor that detects the distance from the water surface W1. Furthermore, multiple sensors may be used in combination, and the drainage state of the toilet 20 may be determined based on information acquired from multiple sensors.

[0135] Furthermore, in this embodiment, the detection unit 38 is provided in the first connecting pipe 34 as an example, but the installation location of the detection unit 38 is not limited to this. For example, the detection unit 38 may be provided in the first connecting pipe 34, in the drain pipe line 16, or in the bowl portion 22 or trap portion 21a of the toilet 20, depending on the installation state of the fixtures around the drain pipe joint 33.

[0136] Furthermore, although the method of controlling the flush water W by controlling the on-off valve 14a to flow the flush water W or stop the flush has been given as an example, the method of controlling the flush water W is not limited to this. For example, in the case of a flush tank type, the flush water W may be flowed or stopped by controlling the operation of a motor. Also, in the case of a flush valve type, the flush water W may be flowed or stopped by controlling a solenoid valve. Also, for example, when the control unit 40 receives a flush signal, the control signal required for flushing may not be sent, and the supply of the flush water W may be prohibited. [Explanation of symbols]

[0137] 20: Toilet bowl, 38: Detection unit, 40: Control unit, 100: Toilet system

Claims

1. a detection unit that detects the flow of flush water discharged from the toilet; a control unit that determines a partial clog state in which the toilet bowl is partially clogged based on the detection result of the detection unit; A toilet system comprising:

2. The partially clogged state is distinguished from a clogged state in which the toilet bowl is clogged and a normal state in which the toilet bowl is not clogged. The toilet system of claim 1.

3. The control unit is capable of distinguishing the partial clogging state from a plurality of states and determining whether the partial clogging state is closer to the clogging state or the normal state. The toilet system of claim 2.

4. the control unit determines the partial clogging state based on information about the flow velocity of the flush water detected by the detection unit. The toilet system of claim 1.

5. The control unit determines the partial clogging state based on information about the flush water level detected by the detection unit. The toilet system according to any one of claims 1 to 4.

6. the control unit transmits the determined partial clogging state to a notification unit capable of notifying the partial clogging state. The toilet system according to any one of claims 1 to 4.

7. The notification unit notifies the partial clogging state in priority to other notification matters.

7. The toilet system of claim 6.

8. The detection unit is provided in the drain pipe joint, the bowl unit, the trap unit, or the drain pipe line. The toilet system according to any one of claims 1 to 4.

9. The detection unit is a radio wave sensor. The toilet system according to any one of claims 1 to 4.

10. the control unit compares the voltage value detected by the detection unit with a predetermined threshold value to determine the partial clogging state.

10. The toilet system of claim 9.

11. the control unit has a frequency analysis means capable of frequency-analyzing the detection result of the detection unit, the control unit compares a spectrum intensity in a predetermined frequency range with a predetermined threshold in the frequency analysis result to determine the partial clogging state. The toilet system of claim 10.

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