JP2021139169A - Flush toilet - Google Patents

Abstract

To provide a flush toilet capable of easily adding an electrostatic sensor.SOLUTION: A flush toilet 1 includes: a toilet bowl body 11; a flush pipe 2 connected to the toilet bowl body 11; and an electrostatic sensor 3 provided to the flush pipe 2 for detecting the water level. The electrostatic sensor 3 has a pair of electrodes 31, 32, and one electrode 31 of the pair of electrodes 31, 32 is composed of a metal flush pipe 2, and the other electrode 32 is preferably covered with the insulator 321 and connected to flush pipe 2.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to flush toilets.

Conventionally, a flush toilet may be clogged with foreign matter, making it difficult to drain water. Therefore, a flush toilet in which a water level detection sensor is provided in the main body of the flush toilet has been proposed (see, for example, Patent Document 1). The water level detection sensor detects that clogging has occurred when the water level rises, and stops the water supply to the toilet bowl body to prevent sewage and the like from overflowing from the toilet bowl body.

JP-A-2017-145658

When a sensor for detecting the water level is provided in the toilet bowl body, there is a problem that it is difficult to add a new sensor function by remodeling or the like.

The present disclosure relates to a flush toilet including a toilet body, a cleaning pipe connected to the toilet body, and an electrostatic sensor provided in the cleaning pipe to detect the water level.

It is a side view which shows the flush toilet of 1st Embodiment. It is a figure which shows the washing tube and electrode at the time of a normal time in 1st Embodiment. It is a figure which shows the cleaning tube and electrode at the time of clogging in 1st Embodiment. It is a flow chart of the detection by the electrostatic sensor of 1st Embodiment. It is a figure which shows the cleaning tube and electrode of the 2nd Embodiment. It is a figure which shows the cleaning tube and electrode during cleaning in 3rd Embodiment. It is a figure which shows the washing tube and electrode at the time of a normal time in 3rd Embodiment. It is a figure which shows the cleaning tube and electrode at the time of clogging in 3rd Embodiment. It is a figure which shows the washing tube and electrode at the time of a normal time in 4th Embodiment. It is a figure which shows the cleaning tube and electrode at the time of clogging in 4th Embodiment. It is a side view which shows the flush toilet of the 5th Embodiment. It is a side view which shows the washing pipe of 6th Embodiment. It is a side view which shows the flush toilet of the 7th Embodiment. It is a side view which shows the flush toilet of 8th Embodiment. It is a flow chart of the detection by the electrostatic sensor of another embodiment.

Hereinafter, the first embodiment of the flush toilet 1 of the present disclosure will be described with reference to the drawings. In the following description, the front-back direction when viewed from a person sitting on the toilet seat 12 of the flush toilet 1 is defined as the front-back direction.

The flush toilet 1 is a wall-mounted toilet, and the back surface of the flush toilet 1 is fixed and attached to the wall 9 at a position away from the bottom surface of the space in which the flush toilet 1 is installed. The flush toilet 1 has a washing pipe 2, an electrostatic sensor 3, and a flush valve 4 as being arranged inside the wall 9.

The flush toilet 1 is arranged on the space side where the flush toilet 1 is installed, and is the toilet body 11, the toilet seat 12, the toilet lid 13, the functional unit 14, the control unit 7, and the notification unit 81. And have. The toilet body 11 has a bowl portion 110 that is open at the top and recessed downward. The bowl portion 110 is configured so that the washing water supplied from the washing pipe 2 described later is always stored at a constant water level, and the lower end thereof is connected to the drain port 111. The toilet seat 12 is arranged along the opening of the toilet body 11, and has a substantially annular shape and a flat upper surface. The toilet lid 13 is a lid that covers the openings of the toilet seat 12 and the toilet body 11 so as to be openable and closable, and is hinged to the upper part of the functional portion 14.

The functional unit 14 is arranged above the toilet body 11, and is a portion in which functional parts for operating each part of the flush toilet 1 such as the opening / closing mechanism of the toilet seat 12 and the toilet lid 13 and the user's local cleaning device are arranged. .. A control unit 7 and a notification unit 81, which will be described later, are arranged in the functional unit 14.

The cleaning pipe 2 is a metal pipe, one end of which is connected to the back side of the toilet bowl body 11, and the other end of which penetrates the wall 9 and is connected to a water supply source (not shown) inside the wall 9. The washing pipe 2 supplies washing water from the water supply source into the bowl portion 110. As shown in FIG. 1, the cleaning pipe 2 has a horizontal portion 21 extending in a substantially horizontal direction from the back surface side of the toilet bowl main body 11, and an extension portion 22 bent from the horizontal portion 21 and extending in the vertical direction.

The horizontal portion 21 is a portion in which one end of the pipe of the cleaning pipe 2 is connected to the toilet bowl main body 11 and extends horizontally from the connected portion to the rear of the toilet bowl main body 11. The lower end surface 21b of the horizontal portion 21 is arranged at least at a position lower than the upper surface 11a of the toilet bowl main body 11. Preferably, the upper end surface 21a of the horizontal portion 21 is also arranged at a position lower than the upper surface 11a of the toilet bowl main body 11.

The extension portion 22 extends upward from an end portion of the horizontal portion 21 that is not connected to the toilet bowl body 11. The extension portion 22 may extend in any direction or may be bent as long as the washing water can be supplied from the water supply source to the toilet bowl main body 11 by using a pump or the like.

The flush valve 4 is a solenoid valve attached to the extension portion 22. The flush valve 4 is provided with a water stop valve for stopping the washing water flowing through the washing pipe 2, an on-off valve for discharging and stopping the washing water, and a check valve for preventing the backflow of the washing water (all not shown). The flush valve 4 discharges and stops the washing water discharged from the washing pipe 2 to the bowl portion 110.

The electrostatic sensor 3 is a capacitance sensor that detects the water level from the change in capacitance between the electrode for the sensor and the GND electrode. The electrostatic sensor 3 is provided in the cleaning tube 2 and has a pair of electrodes 31 and 32 and a processing unit 33. As shown in FIG. 1, one of the pair of electrodes 31 and 32, the first electrode 31, is composed of a metal cleaning tube 2. The cleaning tube 2 is connected to a GND circuit and serves as a GND electrode. Of the pair of electrodes 31 and 32, the other second electrode 32 is arranged on the upper surface side of the horizontal portion 21 of the cleaning pipe 2 and is connected to the horizontal portion 21. The second electrode 32 is an electrode for a sensor.

FIG. 2A shows a state in which the second electrode 32 is connected to the cleaning pipe 2. The second electrode 32 is configured with an insulator 321 covering the periphery of the metal electrode body 320. As shown in FIGS. 2A and 2B, at least a part of the insulator 321 is shorter than the electrode body 320. The second electrode 32 is separated from the cleaning tube 2 which is the first electrode 31 by an insulator 321 so that a change in capacitance can be detected between the two electrodes. In a normal state where the washing water stored in the bowl portion 110 of the toilet bowl main body 11 is the normal water level, the water level of the horizontal portion 21 of the washing pipe 2 is low. As shown in FIG. 2A, in the horizontal portion 21, the washing water is present on the lower side, but is not in contact with the electrode 32.

When the flush valve 4 is opened to clean the toilet bowl body 11 and the washing water is discharged, or when the toilet bowl body 11 is clogged and the water level of the bowl portion 110 rises, as shown in FIG. 2B. The inside of the cleaning tube 2 is filled with water, and the second electrode 32 is in contact with water. The electrostatic sensor 3 detects a change in the capacitance of the water level that touches the electrode 32. When the cleaning pipe 2 is low in water, the capacitance is small, and when the cleaning pipe 2 is filled with water, the capacitance is large. The electrostatic sensor 3 detects a change in the water level in the cleaning pipe 2, and the control unit 7, which will be described later, determines whether or not the toilet bowl body 11 is clogged.

As shown in FIG. 3, in the first embodiment, the electrostatic sensor 3 is energized by applying a voltage after a predetermined time has elapsed after cleaning the toilet bowl body 11, and the control unit 7 clogs the inside of the toilet bowl body 11. It is preset to determine whether or not it has occurred. That is, when a voltage is applied to the flush valve 4 to energize the flash valve 4 and the flush valve 4 is opened to discharge the washing water, the electrostatic sensor 3 is not yet energized (S1). In the electrostatic sensor 3, the electrostatic sensor 3 is energized (S3) after a predetermined time has elapsed (S2) after cleaning the toilet bowl main body 11. After that, electricity is continuously supplied for a predetermined time, and is controlled by a control unit 7 described later so as to energize and perform detection (S4). "After cleaning the toilet bowl body" means the time from the start of cleaning, and more specifically, it may be after a predetermined time has elapsed since the cleaning button was pressed, and after a predetermined time has elapsed since the flush valve 4 was opened. It may be.

The predetermined time means, for example, 3 seconds or more. For example, the electrostatic sensor 3 may be energized 3 seconds after cleaning the toilet body 11. After that, electricity may be continuously supplied for 5 seconds until 8 seconds after the water is discharged by the flush valve 4, and may be controlled by the control unit 7 described later so as to energize and perform detection.

In the state of the flush valve 4 at the time of water discharge (S1) in FIG. 2B, the electrostatic sensor 3 is not yet energized. With such a configuration, the chance of the second electrode 32 coming into contact with water in the energized state is reduced, so that the occurrence of rust is suppressed.

When the electrostatic sensor 3 detects after energization (S3), it is detected whether or not the second electrode 32 is in contact with the washing water (S4). As shown in FIG. 2A, if the washing water is low or the second electrode 32 is not in contact with the washing water, the water level in the washing pipe 2 (and therefore, the inside of the toilet body 11) is low, and the toilet body 11 is clogged. If not, it is determined by the control unit 7. This completes the detection (S6). The electrostatic sensor 3 is not energized until the power is turned off (S7), the flush valve 4 is opened again, and the toilet bowl body 11 is cleaned (S1). When the state shown in FIG. 2B is obtained 8 seconds after the supply of the washing water, it is determined that the water level in the washing pipe 2 (thus, the inside of the toilet body 11) is high and the toilet body 11 is clogged. It is determined by 7. In this case, the detection is continued until the water level drops (S8).

While the electrostatic sensor 3 is detecting, that is, from 3 seconds to 8 seconds after cleaning the toilet body 11, the flush toilet 1 is cleaned by the user pressing the toilet cleaning switch or the like. Even if you are instructed to do this, the next toilet bowl cleaning will not be performed. The control unit 7 does not open the flush valve 4 and does not perform the toilet bowl cleaning operation even when the user gives an instruction to clean the toilet bowl. If the next toilet bowl is washed while the electrostatic sensor 3 is detecting, the cleaning water is supplied to the cleaning pipe 2, so that the electrostatic sensor 3 erroneously detects that the water has overflowed. be.

If the electrostatic sensor 3 does not detect an increase in the water level after 8 seconds have passed after cleaning the toilet bowl main body 11, the detection is terminated and the energization of the electrostatic sensor 3 is stopped. If there is no clogging, as shown in FIG. 2A, the water in the cleaning pipe 2 is low and the second electrode 32 also does not come into contact with water, so that the occurrence of rust is suppressed.

If the electrostatic sensor 3 detects that the water in the toilet bowl body 11 exceeds the normal water level during the detection, the electrostatic sensor 3 detects the overflow even after 8 seconds have passed after cleaning the toilet bowl body 11. It does not end and continues detection. When a rise in the water level is detected, the detection is continued until the clogging of the toilet bowl body 11 is cleared and the water level returns to the normal water level, either manually or automatically. Therefore, after detecting the clogging, the electrostatic sensor 3 can detect whether or not the clogging is cleared and the water level returns to the normal level. After the clogging is cleared, the electrostatic sensor 3 stops energizing.

The processing unit 33 is a converter that measures the capacitances of the first electrode 31 and the second electrode 32 and converts them into digital values. The processing unit 33 is arranged in the functional unit 14 and is connected to a control unit 7 that controls the operation of the flush toilet 1.

As shown in FIG. 1, the control unit 7 is arranged inside the functional unit 14 and is electrically connected to the electrostatic sensor 3 and the flush valve 4. The control unit 7 controls the opening and closing of the flush valve 4 based on the water level detected by the electrostatic sensor 3. When the control unit 7 receives a signal that the water level detected by the electrostatic sensor 3 is equal to or higher than a predetermined threshold value, the control unit 7 is clogged with the toilet bowl body 11, and the water in the toilet bowl body 11 is likely to overflow. Is determined to be. When the control unit 7 determines that the toilet bowl main body 11 is clogged, the control unit 7 controls to close the flush valve 4 and stops the water supply to the bowl unit 110. When the control unit 7 determines that the toilet bowl main body 11 is clogged based on the detection result of the electrostatic sensor 3, the control unit 7 outputs the clogging to the notification unit 81 described later. While the flush valve 4 is opened to clean the toilet bowl body 11 and the wash water is supplied, the control unit 7 does not determine that clogging has occurred based on the water level detected by the electrostatic sensor 3.

The notification unit 81 is arranged inside the functional unit 14 and is electrically connected to the control unit 7. The notification unit 81 is configured to be able to transmit a signal to the management unit 82 outside the flush toilet 1. When the control unit 7 determines that the toilet bowl body 11 is clogged, the notification unit 81 receives a signal output from the control unit 7 that the toilet bowl body 11 is clogged, and is flushed. Notify the external management unit 82 that manages the status of the toilet bowl 1 that the toilet is clogged.

The management unit 82 is a system for maintaining and managing the flush toilet 1, and receives a signal notifying that the flush toilet 1 being managed is clogged. Upon receiving the information, the manager of the management unit 82 performs maintenance of the flush toilet 1.

According to the first embodiment, the following effects are obtained. The flush toilet 1 is configured to include a toilet body 11, a cleaning tube 2 connected to the toilet body 11, and an electrostatic sensor 3 provided in the cleaning tube 2 to detect the water level. Since the electrostatic sensor 3 is connected to the washing pipe 2, the electrostatic sensor 3 can be attached to the flush toilet regardless of the shape of the toilet body 11. It is possible to provide a flush toilet to which the electrostatic sensor 3 can be easily added. Therefore, it is possible to retrofit the electrostatic sensor 3 by reforming or the like. If a sensor that detects the water level, such as an electrostatic sensor, is arranged inside the toilet bowl body, there is a risk that dirt from the use of the flush toilet will adhere to the sensor's detection unit and the sensor will not move. However, since the electrostatic sensor 3 is attached to the cleaning tube 2, dirt is less likely to adhere. Even if the sewage rises to the cleaning pipe 2 and adheres to the electrostatic sensor 3, since the electrostatic sensor 3 is attached to the cleaning pipe 2, it can be washed away with new cleaning water and can be detected. Can be maintained. By using an electrostatic sensor 3 that does not have a moving part as a sensor for detecting the water level, even if the washing water vigorously hits the electrostatic sensor 3 every time, the durability is improved because there is no moving part.

According to the first embodiment, the electrostatic sensor 3 is configured to include a pair of electrodes 31 and 32. Of the pair of electrodes 31 and 32, one electrode 31 was made of a metal cleaning tube, and the other electrode 32 was connected to the cleaning tube 2 in a state of being covered with an insulator. The electrostatic sensor 3 requires two electrodes. By using one of the first electrodes 31 as a metal cleaning tube 2, it is not necessary to provide two electrodes, and the configuration is simple and easy to install. Since the electrostatic sensor 3 detects by the electrodes, it is less likely to interfere with the flow path of the washing water than other sensors having a movable part, and the toilet bowl cleaning performance is improved. When water comes into contact with the electrode 32, it can be determined that the toilet bowl body 11 is clogged and the water level is rising, so that the control design is simple and the possibility of false detection can be reduced.

According to the first embodiment, the electrostatic sensor 3 was energized after a predetermined time had elapsed after cleaning the toilet bowl main body 11. As a result, during the cleaning of the toilet body 11, the electrostatic sensor 3 is not energized while the cleaning water is flowing in the cleaning pipe 2, so that the components contained in the cleaning water are less likely to come into contact with electricity. , The generation of rust can be suppressed.

The present disclosure is not limited to the above embodiment, and modifications, improvements, etc. are included in the present disclosure. The cleaning pipe 2A and the second electrode 32A according to the second embodiment will be described with reference to FIG. In the following description of the second embodiment, the description of the configuration common to the first embodiment will be omitted, and a common reference numeral will be used. As shown in FIG. 4, in the second embodiment, the thread groove 23a is formed in the connection portion 23 with the electrode 32 in the cleaning pipe 2A. Specifically, a through hole is formed on the upper side surface of the cleaning pipe 2A, and a thread groove 23a is formed on the side surface of the through hole.

The electrode body 320 of the second electrode 32A is attached to the connecting portion 23 in a state of being covered with an insulator. The second electrode 32A is inserted into an insert nut 34 having a threaded groove 34a formed on the outer surface thereof so as to fit with the threaded groove 23a, and is attached by aligning the threaded groove 34a of the insert nut 34 with the threaded groove 23a of the connecting portion 23. Be done.

The thread groove 23a and the insert nut 34 of the cleaning pipe 2 constitute an insertion length adjusting mechanism that can adjust the insertion length of the second electrode 32A to be inserted into the cleaning pipe 2. While screwing the thread groove 34a of the insert nut 34 into the thread groove 23a, the length of inserting the second electrode 32A into the cleaning pipe 2 is adjusted. As a result, the insertion length of the second electrode 32A can be adjusted so that it does not come into contact with water in normal times, depending on the inclination and thickness of the washing pipe 2 at the place where the flush toilet 1 is installed, the surrounding arrangement, and the like. can.

As a modification of the second embodiment, the insertion length adjusting mechanism is not limited to the thread groove. The attachment may be attached to the through hole of the cleaning pipe so that the insertion length of the second electrode can be changed stepwise.

Next, the cleaning pipe 2 and the second electrode 32B according to the third embodiment will be described with reference to FIGS. 5A to 5C. In the third embodiment, the shape of the insulator 321B that covers the electrode body 320 of the second electrode 32B is different from that of the first embodiment. As shown in FIGS. 5A to 5C, the insulator 321B has an insulator 321B located at least upstream of the second electrode 32B in the cleaning pipe 2 formed longer than the lower end of the electrode body 320.

As shown in FIG. 5A, when the flush valve 4 is opened to supply the cleaning water to the cleaning pipe 2B and the cleaning water is supplied to the toilet bowl body 11, the insulator 321B on the upstream side of the electrode body 320 becomes the electrode body 320. Since it extends downward longer than the lower end of the toilet, it is less likely to be exposed to the flow of wash water supplied from the upstream side indicated by the arrow.

As shown in FIG. 5B, when the toilet bowl body 11 is not clogged after the washing water is supplied, the water level of the washing pipe 2B is low, so that the second electrode 32B does not come into contact with the washing water.

As shown in FIG. 5C, when clogging occurs, the water level of the cleaning pipe 2B rises and the second electrode 32B comes into contact with water. It is detected that the second electrode 32B is wet, and the control unit 7 determines that the second electrode 32B is clogged.

According to the third embodiment, the area of the second electrode 32B in contact with water is reduced as compared with the first embodiment, so that rust on the second electrode 32B is suppressed. Specifically, the period until the second electrode 32B rusts is lengthened, and the amount of rust generated in a predetermined period is reduced. Further, as in the first embodiment, when water comes into contact with the electrode 32B, it can be determined that the toilet bowl body 11 is clogged and the water level is rising, so that the control design is simple and erroneous detection is performed. The possibility can be reduced.

As a modification of the third embodiment, the length of the insulator 321B that covers the periphery of the electrode body 320 may be longer than that of the electrode body 320 in the entire circumference of the electrode body 320. Even if the insulator 321B is cylindrical, the lower end of the electrode body 320 is vacant, so if clogging occurs and the cleaning pipe 2 is filled with water, the lower end of the electrode body 320 comes into contact with water. Therefore, the same effect as described above is obtained.

Next, the cleaning tube 2 and the pair of electrodes 31C and 32C according to the fourth embodiment will be described with reference to FIGS. 6A and 6B. The fourth embodiment is different from the first to third embodiments in that the cleaning pipe 2C is made of resin. In the fourth embodiment, a pair of electrodes 31C and 32C are connected to the cleaning tube 2C. The pair of electrodes 31C and 32C are arranged side by side at intervals on the upper surface of the horizontal portion 21 of the cleaning pipe 2C. FIG. 6A shows the normal cleaning pipe 2C. Normally, the pair of electrodes 31C and 32C are not in contact with water. FIG. 6B shows the cleaning pipe 2C in a clogged state. As shown in FIG. 6B, even when the cleaning tube 2C is made of resin, by connecting the pair of electrodes 31C and 32C to the cleaning tube 2C, the electrostatic sensor 3C is used to detect the clogging of the toilet bowl body 11. The same effect as that of the first embodiment can be obtained.

Next, the flush toilet 1D according to the fifth embodiment will be described with reference to FIG. 7. The fifth embodiment is common to the fourth embodiment in that the cleaning pipe 2D is made of resin, and the fourth embodiment is provided with a pair of electrodes 31D and 32D in the extension portion 22 of the cleaning pipe 2D. Different from.

The pair of electrodes 31D and 32D are arranged side by side in the vertical direction at intervals on the side surfaces of the extension portion 22. Normally, the pair of electrodes 31D and 32D are not in contact with water. When clogging occurs, the water level in the bowl portion 110 rises, fills the horizontal portion 21 of the cleaning pipe 2, and rises above the lower side of the extension portion 22. The lower electrode 31D of the pair of electrodes 31D and 32D provided on the extension portion 22 comes into contact with water, and the upper electrode 32D comes into contact with water later than the electrode 31D. By detecting the water level in the extension portion 22, the clogging of the toilet bowl main body 11 can be detected by using the electrostatic sensor 3D, and the same effect as that of the first embodiment can be obtained.

Next, the cleaning pipe 2E according to the sixth embodiment will be described with reference to FIG. The cleaning pipe 2E according to the sixth embodiment is different from the first to fifth embodiments in that it has an inclined portion 24 that is inclined obliquely from the downstream end portion of the horizontal portion 21 toward the toilet body 11. The cleaning pipe 2E is common to the fourth and fifth embodiments in that it is made of resin.

The pair of electrodes 31E and 32E are arranged side by side in the vertical direction at intervals on the side surfaces of the inclined portion 24. Normally, the pair of electrodes 31E and 32E are not in contact with water. When clogging occurs, the water level in the bowl portion 110 rises, and the extension portion 22 of the cleaning pipe 2 is filled with drainage. The lower electrode 31E of the pair of electrodes 31E and 32E provided on the extension portion 22 comes into contact with water, and the upper electrode 32E comes into contact with water later than the electrode 31E. By detecting the water level in the inclined portion 24, it is possible to detect the clogging of the toilet bowl main body 11 by using the electrostatic sensor 3E, and the same effect as that of the first embodiment is obtained.

Next, the flush toilet 1F according to the seventh embodiment will be described with reference to FIG. The flush toilet 1F is different from the first embodiment in that it is a tank type. The flush toilet 1F has a toilet cleaning tank 4F instead of the flush valve 4 in the first embodiment. Inside the toilet bowl washing tank 4F, although not shown, a ball tap for supplying water, a float for stopping the ball tap, and an overflow for limiting the water level of the washing water and supplying make-up water to the toilet bowl body 11 A pipe, a flapper valve for opening and closing the drain port, a ball chain for pulling up the flapper valve, a pulling arm for pulling up the ball chain, and the like are housed. When the user gives an instruction to clean the toilet bowl by operating the remote controller or pressing a button, these parts operate in conjunction with each other by a known method, and the toilet bowl body 11 is supplied with cleaning water. ing.

The lower end of the toilet bowl cleaning tank 4F is connected to the cleaning pipe 2. The cleaning pipe 2 extends downward from the lower end of the toilet bowl cleaning tank 4D and bends toward the toilet bowl main body 11. The cleaning pipe 2 according to the fifth embodiment is made of metal, and the cleaning pipe 2 is provided with the electrostatic sensor 3F as in the first embodiment. Specifically, a portion extending downward from the lower end of the toilet bowl cleaning tank 4F forms the first electrode 31F, and the second electrode 32F is attached to the horizontal portion 21 of the cleaning pipe 2. The seventh embodiment also has the same effect as that of the first embodiment.

Next, the flush toilet 1G according to the eighth embodiment will be described with reference to FIG. The flush toilet 1F is common to the seventh embodiment in that it is a tank type. The flush toilet 1F is different from the eighth embodiment in that the washing pipe 2G is made of resin.

The pair of electrodes 31G and 32G are arranged side by side in the vertical direction at intervals on the side surfaces of the extension portion 22. Normally, the pair of electrodes 31G and 32G are not in contact with water. When clogging occurs, the water level in the bowl portion 110 rises, fills the horizontal portion 21 of the cleaning pipe 2G, and rises above the lower side of the extension portion 22. The lower electrode 31G of the pair of electrodes 31G and 32G provided on the extension portion 22 comes into contact with water, and the upper electrode 32G comes into contact with water later than the electrode 31G. By detecting the water level in the extension portion 22, the clogging of the toilet bowl main body 11 can be detected by using the electrostatic sensor 3G, and the same effect as that of the first embodiment can be obtained.

In the first embodiment, the electrostatic sensor 3 is energized after a predetermined time has elapsed after cleaning the toilet bowl main body 11. However, as shown in FIG. 11, the toilet bowl main body 11 may be energized from the time of cleaning (S1). Specifically, the electrostatic sensor 3 may be energized before the flush valve 4 is energized and the valve is opened (S2). With this configuration, since the electrodes come into contact with the cleaning water each time cleaning is performed (S3), it is possible to detect whether the electrostatic sensor 3 is in a detectable state or is not out of order (S4). If the detected water level is within the range of the preset numerical value (S5), it is determined that there is no abnormality (S6), and the power is continuously supplied until the next cleaning of the toilet bowl main body 11. If the sensor does not detect the cleaning water even if the cleaning water is supplied, the control unit determines that the electrostatic sensor is out of order (S7), and can notify the abnormal situation (S8).

The embodiments described above may be combined as appropriate. The cleaning tube may be made of metal or resin. The electrostatic sensor may be provided at any position as long as it can detect the water level. In the description of the second and subsequent embodiments, the processing unit is omitted from the drawing, but if the electrode and the control unit are electrically connected, the arrangement and configuration of the processing unit may be appropriately changed. ..

1 Flush toilet, 2 Wash tube, 3 Electrostatic sensor, 11 Toilet body, 31 Electrode, 32 Electrode, 321 Insulator, 23a Thread groove 23a (Insert length adjustment mechanism), 34 Insert nut (Insert length adjustment mechanism)

Claims (7)

Toilet bowl body and
The cleaning pipe connected to the toilet body and
A flush toilet equipped with an electrostatic sensor for detecting the water level, which is provided in the washing pipe. The electrostatic sensor has a pair of electrodes.
The water washing according to claim 1, wherein one of the pair of electrodes is formed of the metal washing tube, and the other electrode is connected to the washing tube in a state of being covered with an insulator. Flush toilet. The flush toilet according to claim 2, wherein the insulator located at least upstream of the electrode in the washing tube extends downward longer than the lower end of the electrode. The cleaning tube is made of resin and is made of resin.
The flush toilet according to claim 1, wherein the electrostatic sensor has a pair of electrodes connected to the washing tube. The invention according to any one of claims 2 to 4, wherein the connecting portion of the electrode in the cleaning tube is provided with an insertion length adjusting mechanism capable of adjusting the insertion length of the electrode to be inserted into the cleaning tube. Flush toilet. The flush toilet according to any one of claims 1 to 5, wherein the electrostatic sensor is energized after a predetermined time has elapsed after cleaning the toilet body. The flush toilet according to any one of claims 1 to 5, wherein the electrostatic sensor is energized from the time of cleaning the toilet body.

Images