Control device for toilet flushing system, toilet flushing system, toilet system, and remote controller

Abstract

This technology makes it less likely for the water seal to break down. [Solution] When the second predetermined condition is met, the toilet flushing device control device 50 executes a water seal replenishment mode that supplies flushing water to the water reservoir 22 of the toilet bowl 20.

Description

Technical Field

[0001] The present disclosure relates to a control device for a toilet cleaning device, a toilet cleaning device, a toilet device, and a remote controller.

Background Art

[0002] In Patent Document 1, when the elapsed time since the previous toilet cleaning in the drain pipe flushing mode does not exceed the set time, toilet cleaning is performed in the normal flushing mode, and when the elapsed time since the previous toilet cleaning in the drain pipe flushing mode exceeds the set time, a configuration for performing toilet cleaning in the drain pipe flushing mode is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The amount of flushing water used when cleaning a toilet once tends to be suppressed. For this reason, the water level of the water seal formed in the water storage part of the toilet tends to become low. In addition, in recent households, airtightness has been increasing from the perspective of energy conservation. For example, when a ventilation fan or the like is used in a highly airtight household, the air pressure inside the household decreases. Then, when the state where the water level of the water seal in the water storage part of the toilet is low overlaps, water seal breakage is likely to occur, and there is concern that odors will flow into the household from the sewer through the flow path of the toilet.

[0005] The present disclosure has been completed based on the above circumstances, and an object thereof is to provide a technique capable of making it difficult for water seal breakage to occur.

Means for Solving the Problems

[0006] The control device for the toilet flushing device of the first disclosure executes a water seal replenishment mode, which supplies flushing water to the water reservoir of the toilet bowl, when predetermined conditions are met.

[0007] The toilet flushing device of the second disclosure is controlled by the control device for the toilet flushing device of the first disclosure, and in the water seal replenishment mode, the maximum flow rate is reached during the time from the start of water discharge to the end of water discharge, up to half the time elapsed from the start of water discharge.

[0008] The toilet flushing device of the third disclosure is controlled by a control device for the toilet flushing device of the first disclosure, the control device for the toilet flushing device controls the water seal replenishment mode to be performed repeatedly at intervals, and supplies the flushing water to the toilet by overflow water from the flushing tank, wherein the amount of flushing water discharged in subsequent flushes is greater than the amount of flushing water discharged the first time.

[0009] The toilet flushing device of the fourth disclosure is controlled by a control device for a toilet flushing device of the first disclosure, the control device for a toilet flushing device controls the toilet flushing device which supplies flushing water to the toilet bowl by overflow water from a flushing tank, controls the toilet flushing device to repeatedly perform the water seal replenishment mode at intervals, the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is performed a second time or later is less than the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is performed for the first time, and the variation in the amount of flushing water discharged from the tank to the toilet bowl in the water seal replenishment mode is smaller than the variation in the amount of flushing water supplied from the flushing tank to the toilet bowl during toilet flushing.

[0010] The toilet flushing device of the fifth disclosure is controlled by a control device for a toilet flushing device of the first disclosure, the control device for a toilet flushing device controls a toilet flushing device that supplies flushing water to the toilet bowl using overflow water from a flushing tank, the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is executed for the first time is less than the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is executed for the second time or later, the time from when the supply of flushing water to the flushing tank is started for the first time until the flushing water is discharged from the outlet formed in the toilet bowl by the overflow water is shorter than the time from when the supply of flushing water to the flushing tank is started for the second time until the flushing water is discharged from the outlet formed in the toilet bowl by the overflow water.

[0011] The toilet device of the sixth disclosure comprises a control device for a toilet flushing device of the first disclosure, the toilet, and the toilet flushing device for supplying the flushing water to the toilet.

[0012] The remote controller of the seventh disclosure sets the water seal replenishment mode of the control device for the toilet flushing device of the first disclosure. [Brief explanation of the drawing]

[0013] [Figure 1] This is a side view showing a toilet device according to Embodiment 1. [Figure 2] This graph shows the change in the flow rate of cleaning water over time when the pipe cleaning mode and seal water replenishment mode are performed. [Figure 3] This is an example of a flowchart for executing the pipe cleaning mode and water seal replenishment mode in a control device for a toilet flushing system. [Figure 4] This is an example of a time chart for when the pipe cleaning mode and water seal replenishment mode are performed. [Figure 5] This is an example of a time chart when only the pipe cleaning mode is executed. [Figure 6] This is an example of a time chart when only the water seal replenishment mode is executed. [Figure 7]It is a side view showing a toilet device according to Embodiment 3. [Figure 8] It is a side cross-sectional view showing a toilet device of another embodiment.

Mode for Carrying Out the Invention

[0014] First, embodiments of the present disclosure will be listed and described. Combinations arbitrarily made within a range that does not cause contradictions among the following multiple embodiments are also included in the mode for carrying out the invention.

[0015] The control device for a toilet cleaning device of the first disclosure is [1] When a predetermined condition is satisfied, it executes a water seal replenishment mode in which cleaning water is supplied to the water storage part of the toilet. According to this configuration, by executing the water seal replenishment mode, it is possible to prevent the water seal from running out.

[0016] [2] In the control device for a toilet cleaning device described in [1] above, the predetermined condition is that a predetermined time has elapsed since the toilet cleaning was executed. According to this configuration, even if the amount of cleaning water used for toilet cleaning is small, if the predetermined condition is satisfied, the water seal replenishment mode can be executed to prevent the water seal from running out in the water storage part. Here, toilet cleaning means that the user of the toilet flows cleaning water into the toilet to clean it in order to discharge dirt, and includes large cleaning, small cleaning, and cleaning with a different amount of cleaning water from large cleaning and small cleaning (hereinafter, also simply referred to as other cleaning).

[0017] [3] In the control device for a toilet cleaning device described in [1] or [2] above, the predetermined condition is either when the detection part provided in the toilet detects a water level lower than the normal water level of the water storage part other than during toilet cleaning, or when a predetermined time has elapsed since the detection part detected the water level lower than the normal water level. According to this configuration, it is possible to surely prevent the water seal from running out in the water storage part.

[0018] [4] In the control device for a toilet bowl cleaning device according to any one of [1] to [3] above, the predetermined condition is after setting the water seal replenishment mode. According to this configuration, the water seal replenishment mode can be executed only when necessary.

[0019] The toilet bowl cleaning device of the second disclosure is [5] Controlled by the control device for a toilet bowl cleaning device according to any one of [1] to [4] above, and in the water seal replenishment mode, the maximum flow rate is reached until half of the time from the start of water discharge to the end of water discharge in the time from the start of water discharge. According to this configuration, the cleaning water can be quickly supplied to the water storage part.

[0020] [6] The control device for a toilet bowl cleaning device according to any one of [1] to [4] above performs water seal replenishment by the overflow water from the inside of the cleaning tank in the water seal replenishment mode. According to this configuration, since the flow of the cleaning water can be gently supplied to the water storage part, it is possible to prevent the occurrence of siphon effect in the water storage part and the breakage of the water seal when replenishing the water seal.

[0021] [7] In the control device for a toilet bowl cleaning device according to any one of [1] to [4] and [6] above, toilet bowl cleaning includes at least large cleaning and small cleaning, and the amount of the cleaning water supplied to the toilet bowl in the water seal replenishment mode is not more than the amount of the cleaning water supplied to the toilet bowl in the small cleaning. According to this configuration, it is possible to eliminate the breakage of the water seal while suppressing the usage amount of the cleaning water.

[0022] [8] In the control device for a toilet bowl cleaning device according to any one of [1] to [4], [6], and [7] above, the flow velocity of the cleaning water discharged from the water discharge port formed in the toilet bowl in the water seal replenishment mode is smaller than the flow velocity of the cleaning water discharged from the water discharge port in toilet bowl cleaning. According to this configuration, since the flow of the cleaning water can be gently supplied to the water storage part, it is possible to prevent the occurrence of siphon effect in the water storage part and the breakage of the water seal when replenishing the water seal.

[0023] [9] In the control device for a toilet flushing device described in any of [1] to [4] and [6] to [8] above, the flow rate of the flushing water discharged from the spout formed in the toilet bowl in the water seal replenishment mode is smaller than the flow rate of the flushing water discharged from the spout in toilet flushing. With this configuration, the flow of the flushing water can be supplied to the water reservoir at a slower rate, thereby preventing a siphon effect from occurring in the water reservoir when replenishing the water seal and causing the water seal to break.

[0024]

[10] In the control device for a toilet flushing device described in any of [1] to [4] and [6] to [9] above, the toilet flushing includes at least a full flush and a small flush, and the amount of flushing water supplied to the toilet in the water seal replenishment mode is 1 / 3 of the amount of flushing water supplied to the toilet in the full flush. With this configuration, it is possible to reduce the amount of flushing water used while preventing water seal depletion.

[0025]

[11] In the control device for a toilet flushing device described in any of [1] to [4] and [6] to

[10] above, the amount of flushing water supplied to the toilet in the water seal replenishment mode is 0.5L to 2L. This configuration makes it possible to reduce the amount of flushing water used while preventing water seal depletion.

[0026]

[12] The toilet flushing device control device described in any of [1] to [4] and [6] to

[11] above is a toilet flushing device control device that controls a toilet flushing device that supplies flushing water to the toilet bowl by overflow water from a flushing tank, wherein the water seal replenishment mode opens a solenoid valve located in the water supply channel to the flushing tank to supply the flushing water to the toilet bowl. With this configuration, the water seal replenishment mode can be executed while maintaining the amount of flushing water used for flushing the toilet bowl in the flushing tank.

[0027]

[13] In the control device for a toilet flushing device described in any of [1] to [4] and [6] to

[12] above, the time from when the toilet flushing is performed until the water seal replenishment mode is performed is changeable. With this configuration, the timing of when the water seal replenishment mode is performed can be set arbitrarily.

[0028] The toilet flushing device of the third disclosure is

[14] Controlled by a toilet flushing device control device described in any of [1] to [4] and [6] to

[13] above, the toilet flushing device control device controls the water seal replenishment mode to be performed repeatedly at intervals, supplying the flushing water to the toilet by overflow water from the flushing tank, with the amount of flushing water discharged in subsequent flushes being greater than the amount of flushing water discharged the first time. The amount of flushing water stored in the flushing tank is such that the upper end of the overflow pipe protrudes above the liquid surface. For this reason, in the first water seal replenishment mode, it is necessary to supply flushing water to the flushing tank until it exceeds at least the upper end of the overflow pipe. When the first water seal replenishment mode is completed, the liquid level of the flushing water stored in the flushing tank becomes flush with the upper end of the overflow pipe. In this state, if the same amount of cleaning water as the first time is supplied to the cleaning tank when the second water seal replenishment mode is executed, the cleaning water will immediately flow into the overflow pipe. As a result, the amount of cleaning water discharged from the second time onward will be greater than the amount discharged the first time. In other words, the amount of cleaning water supplied to the cleaning tank can always be kept the same, and the amount of cleaning water does not need to be changed each time the water seal replenishment mode is executed, thus simplifying control.

[0029]

[15] The toilet flushing device control device described in any of [1] to [4] and [6] to

[13] above controls the toilet flushing device which supplies flushing water to the toilet using overflow water from the flushing tank, controls the toilet flushing device to perform the seal water replenishment mode repeatedly at intervals, and the amount of flushing water supplied to the flushing tank when the seal water replenishment mode is performed for the second time or later is less than the amount of flushing water supplied to the flushing tank when the seal water replenishment mode is performed for the first time. The amount of flushing water stored in the flushing tank is such that the upper end of the overflow pipe protrudes above the liquid surface. For this reason, in the first seal water replenishment mode, it is necessary to supply flushing water to the flushing tank until the amount exceeds the upper end of the overflow pipe. When the first seal water replenishment mode is completed, the liquid level of the flushing water stored in the flushing tank becomes flush with the upper end of the overflow pipe. In this state, if the same amount of flushing water as the first time is supplied to the flushing tank when the second water seal replenishment mode is executed, the flushing water will immediately flow into the overflow pipe. As a result, the amount of flushing water dispensed from the second time onward will be greater than the amount of flushing water dispensed the first time. In contrast, with this configuration, the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is executed for the second time onward is less than the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is executed for the first time. Therefore, the amount of flushing water supplied to the toilet bowl the second time can be brought closer to the amount of flushing water supplied to the toilet bowl the first time.

[0030] The toilet flushing device of the fourth disclosure is

[16] Controlled by the toilet flushing device control device described in

[15] above, the variation in the amount of flushing water discharged from the flushing tank to the toilet in the water seal replenishment mode is smaller than the variation in the amount of flushing water supplied from the flushing tank to the toilet in the toilet flushing mode. In toilet flushing, flushing water is supplied from the flushing tank to the toilet via a flapper. The timing of when the upright flapper falls over varies depending on the flow of the flushing water, so the amount of flushing water supplied to the toilet in toilet flushing tends to vary. In contrast, the water seal replenishment mode is configured to supply flushing water to the toilet via a fixed (non-movable) overflow pipe. Therefore, the variation in the amount of flushing water supplied to the toilet via the overflow pipe is smaller than the variation in the amount of flushing water supplied to the toilet via the flapper. With this configuration, in water seal replenishment mode, flushing water can be supplied to the toilet in the desired amount.

[0031] The toilet flushing device of the fifth disclosure is

[17] Controlled by the toilet flushing device control device described in

[15] above, the time from when the supply of flushing water to the flushing tank is started for the first time until the flushing water is discharged from the outlet formed in the toilet bowl by the overflow water is shorter than the time from when the supply of flushing water to the flushing tank is started for the second time until the flushing water is discharged from the outlet formed in the toilet bowl by the overflow water. The amount of flushing water stored in the flushing tank is such that the upper end of the overflow pipe protrudes above the liquid surface. For this reason, in the first seal water replenishment mode, it is necessary to supply flushing water to the flushing tank until the amount exceeds at least the upper end of the overflow pipe. When the first seal water replenishment mode is completed, the liquid surface of the flushing water stored in the flushing tank becomes flush with the upper end of the overflow pipe. In this state, when the second water seal replenishment mode is executed, supplying the same amount of flushing water to the flushing tank as the first time will cause the flushing water to immediately flow into the overflow pipe. As a result, the time from when the flushing water supply to the flushing tank is started until the second time the overflow water supplies flushing water to the toilet bowl is shorter than the time from when the flushing water supply to the flushing tank is started until the first time the overflow water supplies flushing water to the toilet bowl. In other words, this configuration makes it possible to quickly supply flushing water to the toilet bowl when executing the second and subsequent water seal replenishment modes.

[0032] The toilet device of the sixth disclosure is

[18] The toilet flushing device comprises a control device for a toilet flushing device as described in any of [1] to [4], [6] to

[13] and

[15] above, the toilet bowl, and a toilet flushing device that supplies the flushing water to the toilet bowl. With this configuration, the toilet device can prevent the water seal from breaking.

[0033] The remote controller in the seventh disclosure is

[19] Set the water seal replenishment mode of the toilet flushing device control device described in any of [1] to [4], [6] to

[13] and

[15] above. With this configuration, the remote controller can execute the water seal replenishment mode remotely.

[0034] <Embodiment 1> Embodiment 1 of the toilet device 10 of this disclosure will be described with reference to the drawings. In the following description, the vertical direction is defined as the positive direction of the X-axis in Figure 1 being the upward direction and the negative direction of the X-axis being the downward direction. The front-rear direction is defined as the positive direction of the Y-axis in Figure 1 being the forward direction and the negative direction of the Y-axis being the backward direction. Specifically, the front-rear direction and the vertical direction refer to the front-rear direction and the vertical direction, respectively, as viewed from the perspective of a person seated on the reclined toilet seat 31.

[0035] As shown in Figure 1, the toilet unit 10 comprises a toilet bowl 20, a functional unit 30, a toilet flushing device 40, a control device 50 for the toilet flushing device, and a remote controller 60. The toilet unit 10 operates the toilet flushing device 40 when the remote controller 60 is operated.

[0036] [Toilet bowl configuration] The toilet bowl 20 is a floor-standing flush toilet installed on the floor of the toilet room R. The toilet bowl 20 has a toilet bowl portion 21. The toilet bowl portion 21 is bowl-shaped with an approximately elliptical opening at the upper end (not shown). The toilet bowl portion 21 has a water reservoir portion 22 at the bottom where flushing water accumulates to form a water seal Ws. Here, the maximum amount of water in the water reservoir portion 22 is the amount of water when the height of the water seal surface S is the same as the height of the top portion 21C located at the downstream end of the rising channel 21B. The water reservoir portion 22 located in the center in the front-rear direction of the toilet bowl portion 21 has a bottom surface portion 22A. The bottom surface portion 22A is inclined to slope slightly downward from the front end toward the rear. At the rear end of the bottom surface portion 22A, a curved surface 22B is formed that curves to bulge toward the rear. A horizontal pipe 23 for discharging flushing water is connected to the downstream end of the water reservoir portion 22.

[0037] [Configuration of the functional section] The functional unit 30 is mounted on the top surface of the toilet bowl 20. The functional unit 30 includes a toilet seat 31, a toilet lid 32, and a main body 33. The main body 33 houses a control unit and the like that controls the displacement of the toilet seat 31 and toilet lid 32 between an upright and a reclined state. The main body 33 is detachably fixed to the toilet bowl 20. The main body 33 supports the toilet seat 31 and toilet lid 32 so that they can rotate freely between a reclined state and an upright state. Figure 1 discloses the toilet seat 31 and toilet lid 32 in a reclined state.

[0038] [Configuration of toilet flushing device] The toilet flushing device 40 is a device that supplies flushing water to the toilet bowl 20. The toilet flushing device 40 is a so-called tank type. The toilet flushing device 40 has a flushing tank 41, a flapper 42, a flapper drive unit 43, an overflow pipe 44, a float switch 45, a water supply channel 46, a solenoid valve 47, and a water level detection unit 48 which is a detection unit. The flushing tank 41 is box-shaped with an open top. The flushing tank 41 is placed on the rear end of the toilet bowl 20. At the lower end of the flushing tank 41, there is a discharge channel 41A that extends toward the toilet bowl 21. The downstream end of the discharge channel 41A is connected to a water outlet 21A formed in the toilet bowl 21. The flushing tank 41 is installed above the toilet bowl 20.

[0039] The flapper 42 is installed at the lower end of the flushing tank 41 so as to block the upstream end of the discharge channel 41A. The flapper drive unit 43 is, for example, composed of a motor and is connected to the flapper 42 via a ball chain 43A. When the flapper drive unit 43 receives a lifting signal from the toilet flushing device control device 50, it retracts the ball chain 43A to raise the flapper 42, connecting the flushing tank 41 and the discharge channel 41A. When the flapper drive unit 43 receives a release signal from the toilet flushing device control device 50, it releases the retracted ball chain 43A to lower the flapper 42, blocking the flushing tank 41 and the discharge channel 41A.

[0040] The overflow pipe 44 is cylindrical and extends vertically, passing through the lower end of the flushing tank 41. The downstream end of the overflow pipe 44 is connected to the discharge channel 41A. The float switch 45 is located on the wall inside the flushing tank 41. When the liquid level L of the flushing water stored in the flushing tank 41 rises and makes contact with the float switch 45, the float switch 45 outputs a water level signal to the toilet flushing device control device 50. The float switch 45 does not output a water level signal if the liquid level L of the flushing water stored in the flushing tank 41 is not in contact with the float switch 45. For example, the float switch 45 is located below the upper end of the overflow pipe 44.

[0041] The water supply channel 46 is a path for supplying flushing water, such as tap water, to the flushing tank 41. The solenoid valve 47 is installed in the middle of the water supply channel 46. When an open signal is input from the toilet flushing device control device 50, the solenoid valve 47 opens, allowing water to be supplied to the flushing tank 41 via the water supply channel 46. When a close signal is input from the toilet flushing device control device 50, the solenoid valve 47 closes, restricting the flow of flushing water through the water supply channel 46. For example, the solenoid valve 47 is designed to allow adjustment of its opening degree, and the opening degree is controlled by the toilet flushing device control device 50.

[0042] The water level detection unit 48 is provided, for example, on the upper edge of the toilet bowl 21. For example, a known ultrasonic sensor is used for the water level detection unit 48. The water level detection unit 48 outputs a voltage signal corresponding to the distance from its own position to the water seal surface S as a distance signal to the toilet flushing device control device 50.

[0043] [Configuration of a control device for a toilet flushing system] The toilet flushing device control device 50 is configured, for example, as a microcomputer and has the function of controlling the discharge of flushing water to the toilet bowl 20 by the toilet flushing device 40 and the supply of flushing water to the flushing tank 41. In this embodiment, the toilet flushing device control device 50 is located above the flushing tank 41, but it may also be located, for example, within the main body 33 of the functional unit 30.

[0044] [Remote controller configuration] The remote controller 60 has the function of operating various functions of the toilet unit 10. The remote controller 60 transmits signals corresponding to user operations to the main body 33 of the functional unit 30 of the toilet unit 10 and the control device 50 for the toilet flushing device, for example, as wireless signals. The remote controller 60 is generally formed in the shape of a rectangular parallelepiped. The remote controller 60 is mounted on the wall of the toilet room R. The remote controller 60 comprises a housing 60A and a number of buttons 60B. The housing 60A houses a microcomputer, batteries, etc. The number of buttons 60B are operated when activating a desired function of the toilet unit 10. Each button 60B is pre-assigned to one of various functions. For example, each button 60B is assigned the function of instructing the opening and closing of the toilet lid 32, the opening and closing of the toilet seat 31, or the start of toilet flushing (large flush, small flush, or other flush).

[0045] The toilet flushing device control unit 50 can control the supply of flushing water to the toilet bowl 20 by the toilet flushing device 40 based on signals transmitted from the remote controller 60.

[0046] [Regarding the operation of the toilet] For example, after using the toilet unit 10, the user presses button 60B on the remote controller 60 that corresponds to toilet flushing. The remote controller 60 then outputs a toilet flushing instruction signal to the toilet flushing device control unit 50, instructing it to flush the toilet. Here, toilet flushing refers to the flushing operation in which the user of the toilet 20 flushes the toilet 20 with flushing water to expel waste, and includes full flush, partial flush, and other flushes. In this embodiment, pressing button 60B corresponding to a full flush supplies approximately 5 liters of flushing water to the toilet 20, pressing button 60B corresponding to a partial flush supplies approximately 4 liters of flushing water to the toilet 20, and pressing button 60B corresponding to other flushes supplies less than 4 liters of flushing water to the toilet 20. When the toilet flushing device control unit 50 receives the toilet flushing instruction signal, it outputs an upward lifting signal to the flapper drive unit 43. Then, the flapper drive unit 43 winds up the ball chain 43A and raises the flapper 42. As a result, flushing water is supplied from the flushing tank 41 to the toilet bowl 21, and the toilet bowl is flushed.

[0047] The toilet flushing device control unit 50 outputs a lifting signal, and after a predetermined time has elapsed corresponding to a large flush, small flush, and other flushes, it outputs a payout signal. Then, the flapper drive unit 43 pays out the ball chain 43A and lowers the flapper 42. Between the time the lifting signal is output and the payout signal is output, the toilet flushing device control unit 50 outputs an open signal to the solenoid valve 47. As a result, the solenoid valve 47 opens and supplies flushing water to the flushing tank 41 via the water supply channel 46. Then, as the liquid level L of the flushing water in the flushing tank 41 gradually rises and contacts the float switch 45, the float switch 45 outputs a water level signal to the toilet flushing device control unit 50. Based on the input of the water level signal, the toilet flushing device control unit 50 outputs a close signal to the solenoid valve 47. As a result, the solenoid valve 47 closes and the supply of flushing water to the flushing tank 41 ends. At this time, the liquid level L of the cleaning water stored in the cleaning tank 41 will be at a predetermined position lower than the upper end of the overflow pipe 44 (see the liquid level L drawn with a solid line in Figure 1).

[0048] [About pipe cleaning mode] For example, the remote controller 60 is configured to switch between a normal state and an abnormal state. Specifically, each time two or more of the multiple buttons 60B are pressed simultaneously, it alternates between the normal state and the abnormal state. When the remote controller 60 switches to the abnormal state, the function assigned to each button 60B switches from the normal function to the abnormal function. At the same time, the remote controller 60 starts outputting an abnormal state signal to the toilet flushing device control unit 50.

[0049] When one of the buttons 60B that have been switched to an abnormal function is pressed, the button 60B that indicates the pipe cleaning mode is pressed, a pipe cleaning mode instruction signal is output to the toilet flushing device control unit 50. For example, each time the button 60B that indicates the pipe cleaning mode is pressed, a pipe cleaning mode instruction signal is output that changes the first predetermined time from when the toilet is flushed until the pipe cleaning mode is executed. The first predetermined condition for executing the pipe cleaning mode is that the first predetermined time has elapsed since the toilet was flushed. For example, each time the button 60B that indicates the pipe cleaning mode is pressed, the first predetermined time from when the toilet is flushed until the pipe cleaning mode is executed, as set in the toilet flushing device control unit 50, is repeatedly switched in the order of 30 minutes, 60 minutes, 120 minutes, and OFF. In other words, the time from when the toilet is flushed until the pipe cleaning mode is executed is changeable.

[0050] Here, the pipe cleaning mode is a cleaning operation that assumes that waste is accumulating in the horizontal pipe 23, and when a first predetermined time has elapsed since the toilet flushing was performed (the first predetermined condition is met), flushing water is discharged once from the toilet flushing device 40 to the toilet 20 at a flow rate of 0.5 L / sec to 3.5 L / sec to discharge the waste from the horizontal pipe 23. In the pipe cleaning mode, it is preferable that the amount of flushing water discharged to the toilet 20 is greater than the amount of water in the seal Ws stored in the toilet 20. In the pipe cleaning mode, it is preferable that the maximum flow rate F (see Figure 2), which is the maximum flow rate of flushing water from the start to the end of water discharge to the toilet 20, is higher than the maximum water supply flow rate of flushing water from the start to the end of water supply supplied to the toilet flushing device 40 via the water supply channel 46. Preferably, the flow rate of flushing water from the toilet flushing device 40 to the toilet 20 in the pipe cleaning mode is 0.8 L / sec to 3.5 L / sec, more preferably 1 L / sec to 2.5 L / sec, and even more preferably 1 L / sec to 1.5 L / sec. After setting a first predetermined time (30 minutes, 60 minutes, or 120 minutes) in the toilet flushing device control unit 50 from the time of toilet flushing until the pipe cleaning mode is executed, the remote controller 60 switches from an abnormal state to a normal state by simultaneously pressing two or more of the multiple buttons 60B. At this time, the remote controller 60 stops outputting the abnormal state signal.

[0051] [About the water seal replenishment mode] When one of the buttons 60B that have been switched to an abnormal function is pressed, the button 60B that instructs the water seal replenishment mode is pressed, and a water seal replenishment mode instruction signal is output to the toilet flushing device control unit 50. For example, each time the button 60B that instructs the water seal replenishment mode is pressed, a water seal replenishment mode instruction signal is output that changes the second predetermined time, which is the predetermined time from when the toilet is flushed or when the pipe cleaning mode is executed until the water seal replenishment mode is executed. The second predetermined condition is that the second predetermined time has elapsed since the toilet was flushed or when the pipe cleaning mode was executed, which is a predetermined condition for executing the water seal replenishment mode. For example, each time the button 60B that instructs the water seal replenishment mode is pressed, the time set in the toilet flushing device control unit 50 from when the toilet is flushed or when the pipe cleaning mode is executed until the water seal replenishment mode is executed is repeatedly switched in the order of 2 hours, 6 hours, 24 hours, and OFF. The first predetermined time for executing the pipe cleaning mode (30 minutes, 60 minutes, 120 minutes) and the second predetermined time for executing the water seal replenishment mode (2 hours, 6 hours, 24 hours) are different, except for 2 hours (120 minutes). The second predetermined time between executing the toilet bowl cleaning or pipe cleaning mode and executing the water seal replenishment mode is changeable.

[0052] Here, the water seal replenishment mode is a replenishment operation to replenish the water seal in the water reservoir 22 by discharging 0.5 L to 2 L of flushing water from the toilet flushing device 40 to the toilet bowl 20 at a second predetermined time after the toilet flushing is performed or the pipe cleaning mode is performed, in order to prevent the amount of flushing water remaining in the water reservoir 22 from decreasing and causing a water seal to run out. In other words, the amount of flushing water supplied to the toilet bowl 20 in the water seal replenishment mode is less than the amount of flushing water supplied to the toilet bowl 20 in the small flush (4 L). Also, the amount of flushing water supplied to the toilet bowl 20 in the water seal replenishment mode may be less than the amount of flushing water supplied to the toilet bowl 20 in the other flush (less than 4 L). In other words, the amount of flushing water supplied to the toilet bowl 20 in the water seal replenishment mode may be less than the amount of flushing water supplied to the toilet bowl 20 in the large flush, small flush and other flush. Since the purpose of the water seal replenishment mode is not to discharge waste, the amount of flushing water supplied to the toilet bowl 20 in the water seal replenishment mode is approximately 1 / 3 of the amount of flushing water supplied to the toilet bowl 20 in the full flush mode, which is the flushing mode that discharges the maximum amount of water among the toilet flushing modes. The water seal replenishment mode is executed repeatedly after the second predetermined time has elapsed. After the toilet flushing device control unit 50 has executed the toilet flushing or the pipe cleaning mode has been executed, the second predetermined time (either 2 hours, 6 hours, or 24 hours) until the water seal replenishment mode is executed, the remote controller 60 switches from an abnormal state to a normal state by pressing two or more of the multiple buttons 60B simultaneously. At this time, the remote controller 60 stops outputting the abnormal state signal.

[0053] When executing the pipe cleaning mode or the water seal replenishment mode, the toilet flushing device control unit 50 maintains the flapper 42 in an inverted position and outputs an open signal to the solenoid valve 47 of the toilet flushing device 40, causing flushing water to be supplied to the flushing tank 41 and raising the liquid level L of the flushing water stored in the flushing tank 41 above the float switch 45. The toilet flushing device control unit 50 then continues to supply flushing water to the flushing tank 41 even after the liquid level L reaches the opening at the upper end of the overflow pipe 44 (see the liquid level L drawn by the dashed line in Figure 1), allowing the flushing water to flow into the opening at the upper end of the overflow pipe 44 and supply flushing water to the toilet 20. In each of the pipe cleaning mode and the water seal replenishment mode, once a predetermined amount of flushing water has been supplied to the toilet 20, the control unit outputs a close signal to the solenoid valve 47, ending the supply of flushing water to the toilet 20. The water seal replenishment mode is not intended to discharge waste, while the pipe cleaning mode is intended to discharge waste from the horizontal pipe 23. Therefore, the amount of flushing water discharged from the toilet flushing device 40 in the water seal replenishment mode is less than the amount of flushing water discharged from the toilet flushing device 40 in the pipe cleaning mode.

[0054] In toilet flushing mode, the flapper 42 is raised to supply flushing water to the toilet bowl 20. The time it takes for the flapper 42 to fall from an upright position is prone to variation depending on the flow of flushing water in the flushing tank 41. In contrast, in pipe flushing mode, flushing water is supplied to the toilet bowl 20 at predetermined intervals via a fixed (non-movable) overflow pipe 44. In seal water replenishment mode, flushing water is supplied to the toilet bowl 20 at second predetermined intervals via a fixed (non-movable) overflow pipe 44. Therefore, the variation in the amount of flushing water discharged from the flushing tank 41 to the toilet bowl 20 in pipe flushing mode and seal water replenishment mode is smaller than the variation in the amount of flushing water supplied from the flushing tank 41 to the toilet bowl 20 in toilet flushing mode.

[0055] For example, the flow rate at which the toilet flushing device 40 supplies flushing water to the toilet bowl 20 when it performs the pipe cleaning mode and the water seal replenishment mode changes over time, as shown in Figure 2. Specifically, in the pipe cleaning mode and the water seal replenishment mode, the maximum flow rate F is reached during the period from the start of water discharge to the end of water discharge, which is the maximum flow rate during the first one-third of the time elapsed. Note that since the water seal replenishment mode should not cause a siphon effect in the water reservoir 22, it is preferable that the maximum flow rate F, which is the maximum flow rate of flushing water during the entire period of water discharged from the outlet 21A formed in the toilet bowl 20 during the water seal replenishment mode, be smaller than the maximum flow rate of flushing water during the entire period of water discharged from the outlet 21A to the toilet bowl 20 during toilet flushing. Furthermore, it is preferable that the maximum flow velocity of flushing water during the entire period of water discharged from the outlet 21A to the toilet bowl 20 during the water seal replenishment mode be smaller than the maximum flow velocity of flushing water during the entire period of water discharged from the outlet 21A to the toilet bowl 20 during toilet flushing. Specifically, in the water seal replenishment mode, it is preferable that the maximum flushing water flow rate during the entire period of time that water is discharged from the outlet 21A to the toilet bowl 20 is smaller than the maximum flushing water flow rate during the entire period of time that water is discharged from the outlet 21A to the toilet bowl 20 in other flushing modes of the toilet bowl.

[0056] [An example of toilet flushing device control using a toilet flushing device control device] An example of the control of the toilet flushing device 40 by the toilet flushing device control device 50 will be explained with reference to Figure 3, etc. The process shown in Figure 3 is always executed repeatedly at predetermined intervals by the toilet flushing device control device 50. First, in step S10, the toilet flushing device control device 50 determines whether or not the remote controller 60 is in an abnormal state. Specifically, in step S10, the toilet flushing device control device 50 determines whether or not an abnormal state signal has been input from the remote controller 60. In step S10, if the toilet flushing device control device 50 determines that an abnormal state signal has been input (Yes in step S10), it proceeds to step S23 and resets its own timers, the pipe cleaning timer 51, the water seal replenishment timer 52, and the pipe cleaning completed flag (for example, to 0), terminates the process shown in Figure 3, and executes the process in Figure 3 again. The toilet flushing device control device 50 repeatedly executes step S23 as long as an abnormal state signal is input.

[0057] If it is determined in step S10 that no abnormal state signal is input (No in step S10), the process proceeds to step S11.

[0058] When the system proceeds to step S11, the toilet flushing device control unit 50 determines whether or not toilet flushing (full flush, partial flush, and other flushes) has been performed. Specifically, in step S11, the toilet flushing device control unit 50 determines whether or not a toilet flushing instruction signal has been input from the remote controller 60 to instruct toilet flushing. If the toilet flushing device control unit 50 determines in step S11 that a toilet flushing instruction signal has been input (Yes in step S11), it proceeds to step S23. If the toilet flushing device control unit 50 determines in step S11 that a toilet flushing instruction signal has not been input (No in step S11), it proceeds to step S12.

[0059] When the system proceeds to step S12, the toilet flushing device control unit 50 determines whether the pipe cleaning mode is set to 30 minutes, 60 minutes, or 120 minutes. If, in step S12, the toilet flushing device control unit 50 determines that the pipe cleaning mode is not set to 30 minutes, 60 minutes, or 120 minutes (No in step S12) (i.e., OFF), the system proceeds to step S18. If, in step S12, the toilet flushing device control unit 50 determines that the pipe cleaning mode is set to 30 minutes, 60 minutes, or 120 minutes (Yes in step S12), the system proceeds to step S13.

[0060] When the system proceeds to step S13, the toilet flushing device control unit 50 determines whether the pipe cleaning completed flag is 0 or not. Here, the pipe cleaning completed flag is a flag that indicates whether the pipe cleaning mode has been executed or not, where 0 indicates that the pipe cleaning mode has not been executed and 1 indicates that the pipe cleaning mode has been executed. In step S13, if the toilet flushing device control unit 50 determines that the pipe cleaning completed flag is 1 (No in step S13), it proceeds to step S18. In step S13, if the toilet flushing device control unit 50 determines that the pipe cleaning completed flag is 0 (Yes in step S13), it proceeds to step S14.

[0061] When the process moves to step S14, the toilet flushing device control unit 50 increments the pipe cleaning timer 51. Then, when the process moves to step S15, the toilet flushing device control unit 50 determines whether the value of the pipe cleaning timer 51 after incrementing is the same as the set time from 30 minutes, 60 minutes, or 120 minutes. In other words, in step S15, the toilet flushing device control unit 50 determines whether the first predetermined condition, which is that a first predetermined time has elapsed since the toilet flushing was performed, has been met.

[0062] In step S15, if the toilet flushing device control device 50 determines that the value of the pipe flushing timer 51 after incrementing is not the same as the set time among 30 minutes, 60 minutes, and 120 minutes (No in step S15) (i.e., the set first predetermined time has not elapsed), it terminates the process shown in Figure 3 and executes the process shown in Figure 3 again.

[0063] In step S15, if the toilet flushing device control device 50 determines that the value of the pipe flushing timer 51 after incrementing is the same as the set time from among 30 minutes, 60 minutes, and 120 minutes (Yes in step S15) (i.e., the set first predetermined time has elapsed), it proceeds to step S16.

[0064] When the process moves to step S16, the toilet flushing device control unit 50 causes the toilet flushing device 40 to execute a pipe cleaning mode. Specifically, the toilet flushing device control unit 50 outputs an open valve signal to the solenoid valve 47 of the toilet flushing device 40, causing it to supply flushing water to the flushing tank 41, and allowing the flushing water to flow into the opening at the upper end of the overflow pipe 44, supplying the flushing water to the toilet 20 as overflow water. In other words, the toilet flushing device control unit 50 has a mode in which, when predetermined conditions are met, flushing water is supplied to the toilet 20 by the overflow water from the flushing tank 41. At this time, the toilet flushing device 40 discharges flushing water (overflow water) to the toilet 20 at a flow rate of 0.5 L / sec to 3.5 L / sec. Then, the toilet flushing device control unit 50 outputs a close valve signal to the solenoid valve 47, ending the supply of flushing water to the toilet 20.

[0065] When the process moves to step S17, the toilet flushing device control unit 50 sets the pipe cleaning completed flag to 1. Then, the toilet flushing device control unit 50 finishes the process shown in Figure 3 and executes the process shown in Figure 3 again. The pipe cleaning completed flag remains set to 1 while toilet flushing is not performed (No in step S11). That is, while the pipe cleaning completed flag is 1, steps S14 to S17 are not executed.

[0066] When the process moves to step S18, the toilet flushing device control unit 50 determines whether the water seal replenishment mode is set to 2 hours, 6 hours, or 24 hours. If the toilet flushing device control unit 50 determines in step S18 that the water seal replenishment mode is not set to 2 hours, 6 hours, or 24 hours (No in step S18) (i.e., OFF), it terminates the process shown in Figure 3 and executes the process shown in Figure 3 again. If the toilet flushing device control unit 50 determines in step S18 that the water seal replenishment mode is set to 2 hours, 6 hours, or 24 hours (Yes in step S18), it proceeds to step S19.

[0067] When the process moves to step S19, the toilet flushing device control unit 50 increments the water seal replenishment timer 52. Then, when the process moves to step S20, the toilet flushing device control unit 50 determines whether the value of the water seal replenishment timer 52 after incrementing is the same as the set time from among 2 hours, 6 hours, and 24 hours. In step S20, if the toilet flushing device control unit 50 determines that the value of the water seal replenishment timer 52 after incrementing is not the same as the set time from among 2 hours, 6 hours, and 24 hours (No in step S20) (i.e., the set second predetermined time has not elapsed), it terminates the process shown in Figure 3 and executes the process shown in Figure 3 again.

[0068] In step S20, if the toilet flushing device control device 50 determines that the value of the water seal replenishment timer 52 after incrementing is the same as the set time from among 2 hours, 6 hours, and 24 hours (Yes in step S20) (i.e., the set second set time has elapsed), it proceeds to step S21.

[0069] When the system proceeds to step S21, the toilet flushing device control unit 50 causes the toilet flushing device 40 to execute a water seal replenishment mode. Specifically, the toilet flushing device control unit 50 outputs an open signal to the solenoid valve 47 of the toilet flushing device 40, causing flushing water to be supplied to the flushing tank 41, and the flushing water to flow into the opening at the upper end of the overflow pipe 44, supplying the flushing water to the toilet bowl 20 as overflow water. In other words, in the water seal replenishment mode, the toilet flushing device 40 replenishes the water seal using the overflow water from the flushing tank 41. That is, when the second predetermined condition is met, the toilet flushing device control unit 50 has a mode in which it supplies flushing water to the toilet bowl 20 using the overflow water from the flushing tank 41. At this time, the toilet flushing device 40 discharges 0.5L to 2L of flushing water (overflow water) into the toilet bowl 20. Then, the toilet flushing device control unit 50 outputs a close signal to the solenoid valve 47, ending the supply of flushing water to the toilet bowl 20.

[0070] After executing step S21, when the process moves to step S22, the toilet flushing device control unit 50 resets the water seal replenishment timer 52, which has been incremented to the same value as the set time (for example, to 0), then terminates the process shown in Figure 3, and executes the process shown in Figure 3 again. The toilet flushing device control unit 50 continues to increment the water seal replenishment timer 52 while toilet flushing is not performed, and repeats the process of executing the water seal replenishment mode when the timer reaches the set time. In other words, the toilet flushing device control unit 50 controls the toilet flushing device 40 to repeatedly execute the water seal replenishment mode at predetermined time intervals.

[0071] If the pipe cleaning mode is not set and only the water seal replenishment mode is set, the liquid level L of the cleaning water stored in the cleaning tank 41 when the water seal replenishment mode is executed for the first time will be at the position where it contacts the float switch 45 (see the liquid level L drawn with a solid line in Figure 1). When the water seal replenishment mode is executed in this state, cleaning water will not be supplied to the toilet bowl 20 until the liquid level L reaches the upper end of the overflow pipe 44 from the position where it contacts the float switch 45 (see the liquid level L drawn with a dashed line in Figure 1), and will be stored in the cleaning tank 41. Then, when the water seal replenishment mode is executed for the second time, since the liquid level L has already reached the upper end of the overflow pipe 44, the entire amount of cleaning water while the solenoid valve 47 is open will flow into the overflow pipe 44. In other words, as soon as the solenoid valve 47 is opened, cleaning water flows into the overflow pipe 44. Therefore, the toilet flushing device 40, which supplies flushing water to the toilet bowl 20 using overflow water from the flushing tank 41, will have a greater volume of flushing water discharged to the toilet bowl 20 in subsequent water seal replenishment modes than in the first water seal replenishment mode. Furthermore, the time from when the supply of flushing water to the flushing tank 41 is started for the first time until the flushing water is discharged from the outlet 21A formed in the toilet bowl 20 by the overflow water is shorter than the time from when the supply of flushing water to the flushing tank 41 is started for the second time until the flushing water is discharged from the outlet 21A formed in the toilet bowl 20 by the overflow water.

[0072] An example of the timing of flush water discharge from the toilet flushing device 40 when the flowchart shown in Figure 3 is executed in the toilet flushing device control device 50 will be explained with reference to Figures 4, 5, and 6.

[0073] [If both pipe cleaning mode and water seal replenishment mode are set] For example, in the toilet flushing device control unit 50, the flowchart shown in Figure 3 is constantly executed repeatedly at a predetermined cycle. For example, by pressing button 60B on the remote controller 60 in an abnormal state, a first predetermined time in the pipe cleaning mode and a second predetermined time in the water seal replenishment mode are set. While the toilet flushing device control unit 50 is receiving an abnormal state signal (Yes in step S10), it repeatedly resets the pipe cleaning timer 51, the water seal replenishment timer 52, and the pipe cleaning completed flag (for example, to 0) (step S23). Then, at time T0 in Figure 4, if two or more of the buttons 60B on the remote controller 60 are pressed simultaneously to switch the state of the remote controller 60 from an abnormal state to a normal state, the output of the abnormal state signal from the remote controller 60 stops.

[0074] When the toilet flushing device control unit 50 executes the process shown in Figure 3 in the next cycle, it is not in an abnormal state (No in step S10), toilet flushing has not been performed (No in step S11), the pipe cleaning mode is set (Yes in step S12), and the pipe cleaning completed flag is 0 (Yes in step S13). Therefore, the toilet flushing device control unit 50 starts measuring the first predetermined time by repeatedly incrementing the pipe cleaning timer 51 (step S14) and comparing the pipe cleaning timer 51 with the first predetermined time (step S15), starting from time T0. Then, when the first predetermined time has elapsed from time T0 and time T1 is reached (Yes in step S15), the toilet flushing device control unit 50 executes the pipe cleaning mode (step S16). For example, in pipe cleaning mode, a predetermined amount of flushing water is supplied from the flushing tank 41 to the toilet 20 over a period of 3.1 seconds from time T1. After executing the pipe cleaning mode, the toilet flushing device control unit 50 sets the pipe cleaning completed flag to 1 (step S17).

[0075] When the toilet flushing device control unit 50 executes the process shown in Figure 3 in the next cycle, the pipe cleaning completed flag is set to 1 (No in step S13), and the water seal replenishment mode is set (Yes in step S18). Therefore, starting from after the pipe cleaning mode is executed (3.1 seconds after time T1), the toilet flushing device control unit 50 starts measuring the second predetermined time by repeatedly incrementing the water seal replenishment timer 52 (step S19) and comparing the water seal replenishment timer 52 with the second predetermined time (step S20). Then, when the second predetermined time has elapsed since the pipe cleaning mode was executed and time T2 is reached (Yes in step S20), the toilet flushing device control unit 50 executes the first water seal replenishment mode (step S21). For example, in the water seal replenishment mode, a predetermined amount of flushing water is supplied from the flushing tank 41 to the toilet bowl 20 over a period of 1.5 seconds. After executing the first water seal replenishment mode, the toilet flushing device control unit 50 resets the water seal replenishment timer 52 (for example, to 0) and starts measuring the second predetermined time again (step S20) in preparation for executing the second water seal replenishment mode.

[0076] For example, at time T4, while measuring the second predetermined time again in preparation for the execution of the third water seal replenishment mode, starting from time T3 after the execution of the second water seal replenishment mode, the toilet flushing device control unit 50 receives a toilet flushing instruction signal from the remote controller 60 (Yes in step S11). Then, the toilet flushing device control unit 50 sends an up signal to the flapper drive unit 43 to raise the flapper 42 and performs toilet flushing by supplying flushing water from the flushing tank 41 to the toilet 20. For example, in toilet flushing, a predetermined amount of flushing water is supplied from the flushing tank 41 to the toilet 20 over a period of 5.4 seconds. At this time, the toilet flushing device control unit 50 resets the pipe cleaning timer 51, the water seal replenishment timer 52, and the pipe cleaning completed flag (for example, to 0) (step S23). Then, the toilet flushing device control unit 50 starts measuring a first predetermined time using the pipe cleaning timer 51 after the toilet flushing is performed (5.4 seconds after time T4) (steps S14, S15). When the first predetermined time has elapsed and time T5 is reached, it executes the pipe cleaning mode (step S16) and sets the pipe cleaning completed flag to 1 (step S17).

[0077] Then, the toilet flushing device control unit 50 starts measuring a second predetermined time using the water seal replenishment timer 52, starting from the time the pipe cleaning mode is executed (3.1 seconds after time T5) (steps S19, S20). When the second predetermined time has elapsed since the pipe cleaning mode was executed and time T6 is reached (Yes in step S20), the first water seal replenishment mode after toilet flushing is executed (step S21), and the water seal replenishment timer 52 is reset (step S22). From time T6 onward, the toilet flushing device control unit 50 starts measuring a second predetermined time from the time the water seal replenishment mode is executed, and repeats the process of executing the water seal replenishment mode when the second predetermined time has elapsed.

[0078] [If only the pipe cleaning mode is set] With the seal water replenishment mode set to unset (i.e., OFF) and the predetermined time for the pipe cleaning mode already set, as shown in Figure 5, if at time T10, two or more of the buttons 60B on the remote controller 60 are pressed simultaneously to switch the state of the remote controller 60 from an abnormal state to a normal state, the output of the abnormal state signal from the remote controller 60 will stop.

[0079] When the toilet flushing device control unit 50 executes the process shown in Figure 3 in the next cycle, it is not in an abnormal state (No in step S10), toilet flushing has not been performed (No in step S11), the pipe cleaning mode is set (Yes in step S12), and the pipe cleaning completed flag is 0 (Yes in step S13). Therefore, the toilet flushing device control unit 50 starts measuring a first predetermined time using the pipe cleaning timer 51, starting from time T10 (steps S14, S15). Then, when the first predetermined time has elapsed from time T10 and time T11 has been reached (Yes in step S15), it executes the pipe cleaning mode (step S16). After executing the pipe cleaning mode, the toilet flushing device control unit 50 sets the pipe cleaning completed flag to 1 (step S17). After executing the pipe cleaning mode, the pipe cleaning completed flag remains set to 1 until the toilet is flushed again. At this point, the toilet flushing device control unit 50 determines that the pipe flushing flag is 1 (No. in step S13) and the water seal replenishment mode is not set (No. in step S18), and repeats the process shown in Figure 3.

[0080] At time T12, after the pipe cleaning mode has been executed, the toilet flushing control device 50 receives a toilet flushing instruction signal from the remote controller 60 (Yes in step S11). The toilet flushing device control device 50 then activates the flapper 42 and performs toilet flushing by supplying flushing water from the flushing tank 41 to the toilet 20. At this time, the toilet flushing device control device 50 resets the pipe cleaning timer 51, the water seal replenishment timer 52, and the pipe flushing completed flag (for example, to 0) (step S23). After the toilet flushing is performed (5.4 seconds after time T12), the toilet flushing device control device 50 starts measuring a first predetermined time using the pipe cleaning timer 51 (step S15). When the first predetermined time has elapsed and time T13 is reached, the toilet flushing device control device 50 executes the pipe cleaning mode after toilet flushing (step S16) and sets the pipe flushing completed flag to 1 (step S17).

[0081] From time T13 onward, the toilet flushing device control unit 50 repeatedly executes the pipe cleaning mode after a first predetermined time has elapsed since the toilet flushing was performed.

[0082] [If only the water seal replenishment mode is set] With the pipe cleaning mode set to unset (i.e., OFF) and only the seal water replenishment mode set to the second predetermined time, as shown in Figure 6, if two or more of the buttons 60B on the remote controller 60 are pressed simultaneously at time T20 to switch the state of the remote controller 60 from an abnormal state to a normal state, the output of the abnormal state signal from the remote controller 60 will stop.

[0083] When the toilet flushing device control unit 50 executes the process shown in Figure 3 in the next cycle, it is not in an abnormal state (No in step S10), toilet flushing is not being performed (No in step S11), the pipe cleaning mode is not set (No in step S12), and the water seal replenishment mode is set (Yes in step S18). Therefore, the toilet flushing device control unit 50 starts measuring a second predetermined time using the water seal replenishment timer 52, starting from time T20 (steps S19, S20). Then, when the second predetermined time has elapsed from time T20 and time T21 is reached, the first water seal replenishment mode is executed (step S21).

[0084] After executing the first water seal replenishment mode, the toilet flushing device control unit 50 resets the water seal replenishment timer 52 (step S22) and starts measuring the second predetermined time again (steps S19, S20) in preparation for executing the second water seal replenishment mode.

[0085] For example, at time T23, while measuring the second predetermined time again in preparation for the execution of the third water seal replenishment mode, starting from time T22 after the second water seal replenishment mode, the toilet flushing device control unit 50 receives a toilet flushing instruction signal from the remote controller 60 (Yes in step S11). Then, the toilet flushing device control unit 50 triggers the flapper 42 and performs toilet flushing by supplying flushing water from the flushing tank 41 to the toilet 20. At this time, the toilet flushing device control unit 50 resets the pipe cleaning timer 51, the water seal replenishment timer 52, and the pipe cleaning completed flag (for example, to 0) (step S23).

[0086] Then, after the toilet flushing device control unit 50 has performed the toilet flushing (5.4 seconds after time T23), it starts measuring a second predetermined time using the water seal replenishment timer 52 (steps S19, S20). When the second predetermined time has elapsed and time T24 is reached, it performs the first water seal replenishment mode after the toilet flushing (step S21) and resets the water seal replenishment timer 52 (step S22). From time T24 onward, the toilet flushing device control unit 50 starts measuring a second predetermined time from the point after the water seal replenishment mode has been performed, and repeats the process of performing the water seal replenishment mode after the second predetermined time has elapsed.

[0087] As shown in Figures 4 and 6, the first predetermined condition for executing the pipe cleaning mode is that a first predetermined time has elapsed since the toilet bowl was flushed. The second predetermined condition for executing the water seal replenishment mode is that a second predetermined time has elapsed since the toilet bowl was flushed. The first predetermined time is different from the second predetermined time. In other words, the first predetermined condition for executing the pipe cleaning mode and the second predetermined condition for executing the water seal replenishment mode are different. Specifically, the time from the end of toilet bowl flushing to the execution of the water seal replenishment mode is longer than the time from the end of toilet bowl flushing to the execution of the pipe cleaning mode.

[0088] As described above, the toilet flushing device control device 50 according to Embodiment 1 executes a water seal replenishment mode, which supplies flushing water to the water reservoir 22 of the toilet bowl 20, when the second predetermined condition is met. With this configuration, the water seal can be prevented from running out by executing the water seal replenishment mode.

[0089] In the toilet flushing device control device 50, the second predetermined condition is that a second predetermined time has elapsed since the toilet flushing was performed. With this configuration, even if the amount of flushing water used for flushing the toilet is small, if the second predetermined condition is met, the water seal replenishment mode can be executed to prevent the water seal in the water reservoir 22 from running out.

[0090] The toilet flushing device 40 is controlled by the toilet flushing device control device 50, and in the water seal replenishment mode, the maximum flow rate F is reached within the time from the start of water discharge to the end of water discharge, which is 1 / 3 of the total time. With this configuration, flushing water can be quickly replenished to the water reservoir 22.

[0091] In the toilet flushing device control device 50, the water seal is replenished by overflow water from the flushing tank 41 in the water seal replenishment mode. With this configuration, the flow of flushing water can be supplied to the water reservoir 22 at a slower rate, thus preventing a siphon effect from occurring in the water reservoir 22 when replenishing the water seal and thus preventing the water seal from running out.

[0092] In the toilet flushing device control device 50, toilet flushing includes at least a full flush and a partial flush, and the amount of flushing water supplied to the toilet 20 in the water seal replenishment mode is less than the amount of flushing water supplied to the toilet 20 in the partial flush mode. With this configuration, it is possible to reduce the amount of flushing water used while preventing water seal depletion.

[0093] In the toilet flushing device control device 50, the flow velocity of the flushing water discharged from the outlet 21A formed in the toilet bowl 20 during the water seal replenishment mode is smaller than the flow velocity of the flushing water discharged from the outlet 21A during toilet flushing. With this configuration, the flow of flushing water can be supplied to the water reservoir 22 at a slower rate, thereby preventing a siphon effect from occurring in the water reservoir 22 when replenishing the water seal and preventing the water seal from being depleted.

[0094] In the toilet flushing device control device 50, the flow rate of flushing water discharged from the outlet 21A formed in the toilet bowl 20 during the water seal replenishment mode is smaller than the flow rate of flushing water discharged from the outlet 21A during toilet flushing. With this configuration, the flow of flushing water can be supplied to the water reservoir 22 at a slower rate, thereby preventing a siphon effect from occurring in the water reservoir 22 when replenishing the water seal and thus preventing the water seal from being depleted.

[0095] In the toilet flushing device control device 50, toilet flushing includes at least a full flush and a partial flush, and the amount of flushing water supplied to the toilet 20 in the water seal replenishment mode is 1 / 3 of the amount of flushing water supplied to the toilet 20 in the full flush mode. With this configuration, it is possible to reduce the amount of flushing water used while preventing water seal depletion.

[0096] In the toilet flushing device control device 50, the amount of flushing water supplied to the toilet bowl 20 in the water seal replenishment mode is 0.5L to 2L. This configuration makes it possible to reduce the amount of flushing water used while preventing water seal depletion.

[0097] The toilet flushing device control unit 50 controls the toilet flushing device 40, which supplies flushing water to the toilet bowl 20 using overflow water from the flushing tank 41. The water seal replenishment mode opens the solenoid valve 47 located in the water supply channel 46 to the flushing tank 41 to supply flushing water to the toilet bowl 20. With this configuration, the water seal replenishment mode can be executed while maintaining the amount of flushing water used for flushing the toilet bowl in the flushing tank 41.

[0098] In the toilet flushing device control device 50, the time between executing toilet flushing and executing the water seal replenishment mode is adjustable. With this configuration, the timing of executing the water seal replenishment mode can be set arbitrarily.

[0099] The toilet flushing device 40 is controlled by a control device 50 for the toilet flushing device, which controls the toilet flushing device 40 to repeatedly execute the water seal replenishment mode at intervals, supplying flushing water to the toilet bowl 20 with overflow water from the flushing tank 41, with the amount of flushing water discharged in subsequent flushes being greater than the amount of flushing water discharged the first time. The amount of flushing water stored in the flushing tank 41 is such that the upper end of the overflow pipe 44 protrudes above the liquid level L. For this reason, in the first water seal replenishment mode, it is necessary to supply flushing water to the flushing tank 41 at least until it exceeds the upper end of the overflow pipe 44. When the first water seal replenishment mode is completed, the liquid level L of the flushing water stored in the flushing tank 41 becomes flush with the upper end of the overflow pipe 44. In this state, when the second water seal replenishment mode is executed, supplying the same amount of cleaning water to the cleaning tank 41 as the first time will cause the cleaning water to immediately flow into the overflow pipe 44. As a result, the amount of cleaning water discharged from the second time onward will be greater than the amount discharged the first time. In other words, the amount of cleaning water supplied to the cleaning tank 41 can always be kept the same, and the amount of cleaning water does not need to be changed each time the water seal replenishment mode is executed, thus simplifying control.

[0100] The toilet flushing device 40 is controlled by a control device 50 for the toilet flushing device, and the variation in the amount of flushing water discharged from the flushing tank 41 to the toilet bowl 20 in the pipe cleaning mode and the water seal replenishment mode is smaller than the variation in the amount of flushing water supplied from the flushing tank 41 to the toilet bowl 20 in the toilet flushing mode. In the toilet flushing mode, flushing water is supplied from the flushing tank 41 to the toilet bowl 20 via the flapper 42. The timing at which the upright flapper 42 collapses varies depending on the flow of the flushing water, so the amount of flushing water supplied to the toilet bowl 20 in the toilet flushing mode is prone to variation. In contrast, the pipe cleaning mode and the water seal replenishment mode are configured to supply flushing water to the toilet bowl 20 via a fixed (non-movable) overflow pipe 44. Therefore, the variation in the amount of flushing water supplied to the toilet bowl 20 via the overflow pipe 44 is smaller than the variation in the amount of flushing water supplied to the toilet bowl 20 via the flapper 42. With this configuration, in water seal replenishment mode, the desired amount of water can be supplied to the toilet bowl 20 for flushing.

[0101] The toilet flushing device 40 is controlled by a control device 50 for the toilet flushing device. The time from when the supply of flushing water to the flushing tank 41 is started for the first time until the flushing water is discharged from the outlet 21A formed in the toilet bowl 20 by overflow water is shorter than the time from when the supply of flushing water to the flushing tank 41 is started for the first time until the flushing water is discharged from the outlet 21A formed in the toilet bowl 20 by overflow water. The amount of flushing water stored in the flushing tank 41 is such that the upper end of the overflow pipe 44 protrudes above the liquid level L. For this reason, in the first seal water replenishment mode, it is necessary to supply flushing water to the flushing tank 41 until the amount exceeds at least the upper end of the overflow pipe 44. When the first seal water replenishment mode is completed, the liquid level L of the flushing water stored in the flushing tank 41 becomes flush with the upper end of the overflow pipe 44. In this state, when the second water seal replenishment mode is executed, supplying the same amount of flushing water to the flushing tank 41 as the first time will cause the flushing water to immediately flow into the overflow pipe 44. As a result, the time from when the supply of flushing water to the flushing tank 41 is started for the second time until the flushing water is supplied to the toilet bowl 20 by the overflow water is shorter than the time from when the supply of flushing water to the flushing tank 41 is started for the first time until the flushing water is supplied to the toilet bowl 20 by the overflow water. In other words, this configuration makes it possible to quickly supply flushing water to the toilet bowl 20 when executing the second and subsequent water seal replenishment modes.

[0102] The toilet system 10 comprises a control device 50 for the toilet flushing device, a toilet bowl 20, and a toilet flushing device 40 that supplies flushing water to the toilet bowl 20. With this configuration, the toilet system 10 can prevent the water seal from breaking.

[0103] The remote controller 60 sets the water seal replenishment mode of the toilet flushing device control unit 50. With this configuration, the remote controller 60 can execute the water seal replenishment mode remotely.

[0104] <Embodiment 2> The toilet flushing device control device 150 according to Embodiment 2 differs from Embodiment 1 in that it executes the pipe flushing mode using a distance signal output from the water level detection unit 48, which is a detection unit. In the following description, components similar to those in Embodiment 1 are denoted by the same reference numerals, and redundant explanations are omitted. Embodiment 2 has the same configuration as Embodiment 1, so it will be described with reference to Figure 1.

[0105] The water level detection unit 48 outputs a voltage signal corresponding to the distance from its own position to the water seal surface S as a distance signal to the toilet flushing device control unit 150. For example, if the pipe cleaning mode and the water seal replenishment mode are set, the toilet flushing device control unit 150 measures a first predetermined time starting from the time the toilet flushing is performed, and monitors whether the magnitude of the distance signal from the water level detection unit 48 has reached a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22. When either the first predetermined time has elapsed, or the magnitude of the distance signal from the water level detection unit 48 has reached a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22, the toilet flushing device control unit 150 executes the pipe cleaning mode.

[0106] Subsequently, the toilet flushing device control device 150 measures a second predetermined time and monitors whether the magnitude of the distance signal from the water level detection unit 48 has reached a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22. After the second predetermined time has elapsed, the toilet flushing device control device 150 executes the water seal replenishment mode. If the toilet flushing device control device 150 determines, while measuring the second predetermined time (before the second predetermined time has elapsed), that the magnitude of the distance signal from the water level detection unit 48 has reached a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22, it executes the pipe cleaning mode. After executing the pipe cleaning mode, the toilet flushing device control device 150 measures a predetermined time again and monitors whether the magnitude of the distance signal from the water level detection unit 48 has reached a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22.

[0107] If the pipe cleaning mode is not set and only the water seal replenishment mode is set, the toilet flushing device control device 150 measures a second predetermined time and monitors whether the magnitude of the distance signal from the water level detection unit 48 has reached a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22. When the toilet flushing device control device 150 determines that the second predetermined time has elapsed or that the magnitude of the distance signal from the water level detection unit 48 has reached a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22, it executes the water seal replenishment mode.

[0108] Furthermore, the toilet flushing device may be configured to execute a pipe cleaning mode (water seal replenishment mode) when a predetermined time (second predetermined time) has elapsed since the water level detection unit 48 provided in the toilet bowl 20 detected that the water level in the water reservoir 22 had fallen below the normal water level. Specifically, if the pipe cleaning mode and water seal replenishment mode are set, the toilet flushing device control unit 150 may be configured to execute a pipe cleaning mode when no toilet flushing instruction signal has been input from the remote controller 60 (i.e., it is not time to flush the toilet) and the distance signal from the water level detection unit 48 has reached a lower water level below the normal water level, starting from the point in time when the measurement of the first predetermined time has elapsed (i.e., the first predetermined condition has been met). Specifically, when the magnitude of the distance signal reaches a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22, the toilet flushing device control unit 150 starts measuring the first predetermined time. Then, after the first predetermined time has elapsed and the pipe cleaning mode has been executed, the measurement of the second predetermined time begins. When the second predetermined time has elapsed (i.e., the second predetermined condition is met), the toilet flushing device control unit 150 executes the first water seal replenishment mode. After executing the first water seal replenishment mode, the toilet flushing device control unit 150 measures the second predetermined time starting from the time after the previous water seal replenishment mode was executed, and repeats the process of executing the water seal replenishment mode once the second predetermined time has elapsed.

[0109] If the pipe cleaning mode is not set and only the water seal replenishment mode is set, the toilet flushing device control device 150 starts measuring a second predetermined time when the magnitude of the distance signal from the water level detection unit 48 reaches a value indicating that the water seal surface S is located below the lower end B of the curved surface 22B of the water reservoir 22. Then, when the second predetermined time has elapsed (i.e., the second predetermined condition is met), the water seal replenishment mode is executed.

[0110] The second predetermined condition for executing the water seal replenishment mode in the toilet flushing device control device 150 is either when the water level detection unit 48 provided in the toilet bowl 20 detects that the water level in the water reservoir 22 has fallen below the normal water level, or when a second predetermined time has elapsed since the water level detection unit 48 detected that the water level has fallen below the normal water level. This configuration ensures that the water seal in the water reservoir 22 does not run out.

[0111] <Embodiment 3> The toilet device 110 according to Embodiment 3 differs from the toilet device 10 of Embodiment 1 in that the water reservoir 122 is a turn-trap type water reservoir, it does not have a flushing tank, and the first predetermined conditions for executing the pipe cleaning mode and the second predetermined conditions for executing the water seal replenishment mode in the toilet flushing device control device 250 are also different. In the following description, components similar to those in Embodiment 1 are denoted by the same reference numerals, and redundant explanations are omitted.

[0112] As shown in Figure 7, the toilet unit 110 comprises a toilet bowl 120, a functional unit 130, a toilet flushing device 140, a control device 250 for the toilet flushing device, and a remote controller 60. The toilet unit 110 operates the toilet flushing device 140 when the remote controller 60 is operated.

[0113] [Toilet bowl configuration] The toilet bowl 120 is a floor-standing flush toilet bowl installed on the floor of the toilet room R. Below the toilet bowl 121, a water reservoir 122 is formed where flushing water accumulates and forms a water seal. The water reservoir 122 is a so-called turn-trap type water reservoir. The water reservoir 122 is provided with a movable part 122B that can change the direction of the outlet 122A formed at the downstream end to two directions: upward and downward. The movable part 122B can change the direction of the outlet 122A to two directions, upward and downward, for example, by a motor (not shown). The water reservoir 122 is also provided with a cover part 122C that covers the movable part 122B. A horizontal pipe 23 is connected to the downstream end of the cover part 122C.

[0114] [Configuration of the functional section] The functional unit 130 is mounted on the top surface of the toilet bowl 120. The functional unit 130 includes a toilet seat (not shown), a toilet lid 32, and a main body 133. The main body 133 houses a control device 250 for the toilet flushing device. The control device 250 for the toilet flushing device is configured, for example, as a microcomputer and has the function of controlling the discharge of flushing water to the toilet bowl 120 by the toilet flushing device 140.

[0115] [Configuration of toilet flushing device] The toilet flushing device 140 is a device that supplies flushing water to the toilet bowl 120. The toilet flushing device 140 has a water supply channel 146 and a solenoid valve 147. The toilet flushing device 140 is a so-called tankless type.

[0116] For example, in any case of performing toilet flushing, pipe cleaning mode, or water seal replenishment mode, the toilet flushing device control unit 250 outputs an open signal to the solenoid valve 147 of the toilet flushing device 140, opening the solenoid valve 147 and supplying flushing water to the toilet 120.

[0117] For example, the toilet flushing device control device 250 executes the pipe cleaning mode when a first predetermined time has elapsed since detecting the drive of the motor for discharging the flushing water stored in the water reservoir 122, which is a turn-trap type water reservoir of the toilet bowl 120. Specifically, if the pipe cleaning mode and the water seal replenishment mode are set, in the pipe cleaning mode, the toilet flushing device control device 250 outputs a shut-off signal to the solenoid valve 147 to close the solenoid valve 147 when a predetermined amount of flushing water has been supplied from the toilet flushing device 140 to the toilet bowl 120, thereby ending the supply of flushing water to the toilet bowl 120. Then, after executing the pipe cleaning mode, the water seal replenishment mode is executed when a second predetermined time has elapsed. In the water seal replenishment mode, the toilet flushing device control device 250 outputs a shut-off signal to the solenoid valve 147 to close the solenoid valve 147 when a predetermined amount of flushing water has been supplied to the toilet bowl 120, thereby ending the supply of flushing water to the toilet bowl 120.

[0118] Furthermore, if the pipe cleaning mode is not set and the water seal replenishment mode is set, the toilet flushing device control unit 250 will execute the water seal replenishment mode when a second predetermined time has elapsed since detecting the motor's operation.

[0119] In the toilet flushing device control device 250, the first predetermined condition for executing the pipe cleaning mode is that a first predetermined time has elapsed since the detection of a drive to discharge the flushing water stored in the water reservoir 122, which is a turn-trap type water reservoir of the toilet bowl 120. With this configuration, even if the amount of flushing water stored in the water reservoir 122 is small, if the first predetermined condition is met, the pipe cleaning mode can be executed to effectively discharge the waste accumulated in the horizontal pipe 23.

[0120] In the toilet flushing device control device 250, the predetermined conditions for executing the pipe cleaning mode and the second predetermined conditions for executing the water seal replenishment mode are different.

[0121] This disclosure is not limited to Embodiment 1 described above in the description and drawings, but also includes, for example, the following embodiments within the technical scope of this disclosure. (1) Unlike Embodiment 1, the pipe cleaning timer (water seal replenishment timer) may be set to a set time, and then decremented (i.e., counted down) may be repeatedly performed until the pipe cleaning timer (water seal replenishment timer) reaches 0, at which point the pipe cleaning mode (water seal replenishment mode) may be executed. Alternatively, if the toilet flushing device control unit has a built-in clock, the pipe cleaning mode (water seal replenishment mode) may be executed at a time that is the same as the time when the toilet flushing is performed, plus a first predetermined time (second predetermined time).

[0122] (2) Unlike Embodiment 1, after setting the time from toilet flushing to executing the water seal replenishment mode using a remote controller in an abnormal state, the water seal replenishment mode may be executed when the remote controller switches from an abnormal state to a normal state by simultaneously pressing two or more of the buttons provided on the remote controller. In other words, in the control device for the toilet flushing device, the second predetermined condition only needs to be after the water seal replenishment mode has been set. With this configuration, the water seal replenishment mode can be executed only when necessary. Alternatively, after setting the time from toilet flushing to executing the pipe cleaning mode using a remote controller in an abnormal state, the pipe cleaning mode may be executed when the remote controller switches from an abnormal state to a normal state by simultaneously pressing two or more of the buttons provided on the remote controller. (3) Unlike Embodiment 1, after flushing the toilet using the remote controller in an abnormal state, the pipe cleaning mode or the water seal replenishment mode may be set, and then the system may automatically switch from the abnormal state to the normal state based on the fact that a certain period of time has elapsed in the abnormal state. In this case, the output of the abnormal state signal is automatically stopped.

[0123] (4) Unlike Embodiment 1, the amount of flushing water supplied to the toilet bowl in the water seal replenishment mode may be matched to the amount of flushing water in the pipe cleaning mode. Also, the amount of flushing water supplied to the toilet bowl in the small flush of the toilet bowl may be matched to the amount of flushing water in the pipe cleaning mode.

[0124] (5) Unlike Embodiment 1, in the pipe cleaning mode and the seal water replenishment mode, the maximum flow rate may be reached during the time from the start of water discharge to the end of water discharge, up to half the time elapsed from the start of water discharge.

[0125] (6) Unlike Embodiment 1, the discharge of water into the toilet bowl in the pipe cleaning mode and the water seal replenishment mode may be performed by discharging water from a trap outlet (jet outlet) provided in the water reservoir, from the outlet of a localized cleaning nozzle provided in the functional section, or from a dedicated outlet that discharges water into the toilet bowl only when the pipe cleaning mode and the water seal replenishment mode are performed. For example, when using the trap outlet, the rotation speed of the pump that pressurizes the cleaning water to the trap outlet may be changed according to the pipe cleaning mode and the water seal replenishment mode, thereby differentiating the flow rate and velocity of the water discharged from the trap outlet.

[0126] (7) In a configuration different from Embodiment 1, in addition to the discharge port to which the downstream end of the discharge channel is connected, a trap discharge port is provided in the water reservoir and discharges cleaning water into the water reservoir, the proportion of cleaning water discharged from the discharge port and the trap discharge port may be made different for toilet bowl flushing, pipe cleaning mode and water seal replenishment mode. Specifically, it is conceivable to make the proportion of cleaning water discharged from the trap discharge port larger in the pipe cleaning mode and water seal replenishment mode compared to the case of toilet bowl flushing.

[0127] (8) Unlike Embodiment 1, the configuration may be such that the pipe cleaning mode is executed two or more predetermined times after a predetermined time has elapsed, and then the water seal replenishment mode is executed. Alternatively, the water seal replenishment mode may be executed before the pipe cleaning mode. In this case, the toilet flushing device control unit controls the toilet flushing device, and the amount of flushing water supplied to the flushing tank when either the pipe cleaning mode or the water seal replenishment mode is executed for the first time may be less than the amount of flushing water supplied to the flushing tank when either the pipe cleaning mode or the water seal replenishment mode is executed for the second time or later. The amount of flushing water stored in the flushing tank is such that the upper end of the overflow pipe protrudes above the liquid surface. For this reason, in the first pipe cleaning mode or water seal replenishment mode, it is necessary to supply flushing water to the flushing tank until the amount exceeds the upper end of the overflow pipe. When the first pipe cleaning mode or water seal replenishment mode is completed, the liquid level of the flushing water stored in the flushing tank becomes flush with the upper end of the overflow pipe. In this state, if the same amount of cleaning water is supplied to the cleaning tank when the second pipe cleaning mode or water seal replenishment mode is executed, the cleaning water will immediately flow into the overflow pipe without being stored in the cleaning tank. As a result, the amount of cleaning water dispensed from the second time onward will be greater than the amount of cleaning water dispensed the first time. In contrast, with this configuration, the amount of cleaning water supplied to the cleaning tank when the pipe cleaning mode or water seal replenishment mode is executed for the second time onward is less than the amount of cleaning water supplied to the cleaning tank when the pipe cleaning mode or water seal replenishment mode is executed for the first time. Therefore, the amount of cleaning water supplied to the toilet bowl the second time can be brought closer to the amount of cleaning water supplied to the toilet bowl the first time.

[0128] (9) Unlike Embodiment 1, the toilet device may be configured to include a chemical tank for storing the chemical and a discharge unit for discharging the chemical from the chemical tank into the toilet. The chemical is a liquid and is for cleaning the toilet bowl. The discharge unit may dispense the chemical into the toilet bowl in liquid form or in foam form. When the chemical is dispensed into the toilet bowl, it is preferable to leave the cleaning water containing the chemical stored in the reservoir for a predetermined soaking time (for example, about 3 hours) in order to clean and disinfect the inside of the toilet bowl. For this reason, the first predetermined condition for executing the pipe cleaning mode in the toilet bowl cleaning device control unit may be either that a first predetermined time has elapsed since the foam for toilet bowl cleaning was discharged from the toilet bowl, or that a first predetermined time has elapsed since the chemical for toilet bowl cleaning was supplied to the toilet bowl. With this configuration, the toilet bowl can be reliably cleaned without wasting foam or chemical. Furthermore, if the pipe cleaning mode is not set and the water seal replenishment mode is set, the second predetermined condition for executing the water seal replenishment mode may be either that a second predetermined time has elapsed since the foam for toilet bowl cleaning was discharged from the toilet bowl, or that a second predetermined time has elapsed since the toilet bowl cleaning agent was supplied to the toilet bowl.

[0129] (10) Unlike Embodiment 1, the amount of flushing water supplied to the toilet bowl may be changed according to the set time of the pipe cleaning timer in pipe cleaning mode and the water seal replenishment timer in water seal replenishment mode. Specifically, it is conceivable to increase the amount of flushing water supplied to the toilet bowl as the set time increases.

[0130] (11) Unlike Embodiment 1, the setting time for the pipe cleaning timer and the water seal replenishment timer, as well as the amount of flushing water supplied to the toilet, may be changed depending on whether a large flush, a small flush, or other type of flushing is performed in the toilet bowl.

[0131] (12) Unlike Embodiment 1, the setting time for the pipe cleaning timer and the water seal replenishment timer, as well as the amount of flushing water supplied to the toilet bowl, may be changed depending on whether the toilet lid is in a downed or upright position. For example, since the water seal evaporates less easily when the toilet lid is in a downed position than when it is upright, it is conceivable to set the water seal replenishment timer for a longer time when the toilet lid is in a downed position compared to when it is upright.

[0132] (13) Unlike Embodiment 1, the pipe cleaning mode and water seal replenishment mode may be not performed when the user is seated on the toilet seat.

[0133] (14) In a configuration different from Embodiment 1, if the main body of the functional unit is provided with functions equivalent to those of a remote controller, the pipe cleaning mode and the water seal replenishment mode may be set by operating the functional unit.

[0134] (15) Unlike Embodiment 2, in the case where the toilet device 210 shown in Figure 8 is provided with a jet outlet 222C as a trap outlet in the water reservoir 222 that discharges cleaning water downstream of the water reservoir 222, the toilet flushing device control device 350 may be configured to execute the pipe cleaning mode when the magnitude of the distance signal from the water level detection unit 48 is a value that indicates the water seal surface S is located below the foremost position B2 on the rear surface of the water reservoir 222. Also, if the pipe cleaning mode is not set and only the water seal replenishment mode is set, the toilet flushing device control device 350 may be configured to execute the water seal replenishment mode when the magnitude of the distance signal from the water level detection unit 48 is a value that indicates the water seal surface S is located below the foremost position B2 on the rear surface of the water reservoir 222.

[0135] (16) In contrast to the above embodiment, the configuration may be such that the pipe cleaning mode is executed two or more predetermined times after a first predetermined time has elapsed, and then the water seal replenishment mode is executed. Alternatively, the water seal replenishment mode may be executed before the pipe cleaning mode. In this case, the toilet flushing device control device controls the toilet flushing device to execute the pipe cleaning mode and the water seal replenishment mode repeatedly at intervals. Then, flushing water is supplied to the toilet by the overflow water from the flushing tank, and the amount of flushing water discharged in the second and subsequent pipe cleaning modes is greater than the amount of flushing water discharged in the first pipe cleaning mode. Also, if the amount of flushing water discharged in each of the pipe cleaning mode and the water seal replenishment mode is the same, the amount of flushing water discharged in the second and subsequent water seal replenishment modes will be greater than the amount of flushing water discharged in the first pipe cleaning mode.

[0136] (17) Unlike the above embodiment, the time interval for performing the water seal replenishment mode may be gradually increased or gradually decreased.

[0137] (18) Unlike the above embodiment, the amount of flushing water supplied to the toilet bowl in the water seal replenishment mode may be the same as the amount of flushing water supplied to the toilet bowl in the small flush mode.

[0138] (19) Unlike the above embodiment, the flow rate and flow rate of the flushing water discharged from the spout formed in the toilet bowl in the water seal replenishment mode may be the same as the flow rate and flow rate of the flushing water discharged from the spout in the small flush mode.

[0139] (20) Unlike the above embodiment, the amount of flushing water supplied to the toilet bowl in the water seal replenishment mode may be approximately 1 / 3 of the amount of flushing water supplied to the toilet bowl in the flushing mode in which the maximum amount of water is discharged for toilet bowl flushing. Alternatively, the amount of flushing water supplied to the toilet bowl in the water seal replenishment mode may be approximately 1 / 3 of the amount of flushing water supplied to the toilet bowl in the flushing mode in which the minimum amount of water is discharged for toilet bowl flushing.

[0140] (21) In contrast to the above embodiment, the toilet flushing may be configured to include only a full flush and a small flush. In other words, the toilet flushing only needs to include a full flush and a small flush.

[0141] Unlike the above embodiment, the tank may be located below the top surface of the toilet bowl, for example, in the space inside the toilet bowl. [Explanation of Symbols]

[0142] 10, 110, 210... Toilet equipment, 20, 120... Toilet, 22... Water reservoir, 40, 140... Toilet flushing device, 41... Flushing tank, 48... Water level detection unit (detection unit), 50, 150, 250, 350... Control device for toilet flushing device, 60... Remote controller, 122... Water reservoir (turn trap type water reservoir), F... Maximum flow rate

Claims

1. After a predetermined time has elapsed since the toilet was flushed, the system will execute a water seal replenishment mode to supply flushing water to the water reservoir in the toilet bowl. A control device for a toilet flushing device that replenishes the seal water using overflow water from the flushing tank in the aforementioned seal water replenishment mode.

2. After setting the water seal replenishment mode to supply flushing water to the water reservoir of the toilet bowl, execute the water seal replenishment mode. A control device for a toilet flushing device that replenishes the seal water using overflow water from the flushing tank in the aforementioned seal water replenishment mode.

3. A control device for a toilet flushing device that controls a toilet flushing device that supplies flushing water to the toilet bowl using overflow water from a flushing tank, When a predetermined time has elapsed since the toilet bowl was flushed, a water seal replenishment mode is executed to supply the flushing water to the water reservoir of the toilet bowl. The aforementioned water seal replenishment mode is a control device for a toilet flushing device that opens a solenoid valve located in the water supply channel to the flushing tank to supply the flushing water to the toilet.

4. A control device for a toilet flushing device that controls a toilet flushing device that supplies flushing water to the toilet bowl using overflow water from a flushing tank, After setting the water seal replenishment mode to supply the flushing water to the water reservoir of the toilet bowl, the water seal replenishment mode is executed. The aforementioned water seal replenishment mode is a control device for a toilet flushing device that opens a solenoid valve located in the water supply channel to the flushing tank to supply the flushing water to the toilet.

5. Toilet flushing includes at least a full flush and a partial flush. The control device for a toilet bowl flushing device according to any one of claims 1 to 4, wherein the amount of flushing water supplied to the toilet bowl in the water seal replenishment mode is less than or equal to the amount of flushing water supplied to the toilet bowl in the small flush.

6. The control device for a toilet flushing device according to any one of claims 1 to 4, wherein the flow velocity of the flushing water discharged from the outlet formed in the toilet bowl in the water seal replenishment mode is smaller than the flow velocity of the flushing water discharged from the outlet in toilet flushing.

7. The control device for a toilet bowl flushing device according to any one of claims 1 to 4, wherein the flow rate of the flushing water discharged from the outlet formed in the toilet bowl in the water seal replenishment mode is smaller than the flow rate of the flushing water discharged from the outlet in toilet bowl flushing.

8. Toilet flushing includes at least a full flush and a partial flush. The control device for a toilet flushing device according to any one of claims 1 to 4, wherein the amount of flushing water supplied to the toilet in the water seal replenishment mode is 1 / 3 of the amount of flushing water supplied to the toilet in the full flush.

9. The control device for a toilet bowl flushing device according to any one of claims 1 to 4, wherein the amount of flushing water supplied to the toilet bowl in the water seal replenishment mode is 0.5 L to 2 L.

10. After a predetermined time has elapsed since the toilet was flushed, the toilet flushing device control unit executes a water seal replenishment mode that supplies flushing water to the water reservoir of the toilet bowl. The control device for the toilet flushing device controls the water seal replenishment mode to be executed repeatedly at intervals, A toilet flushing device that supplies flushing water to the toilet bowl using overflow water from a flushing tank, wherein the amount of flushing water dispensed from the second time onward is greater than the amount of flushing water dispensed the first time.

11. After setting a water seal replenishment mode that supplies flushing water to the water reservoir of the toilet bowl, the toilet flushing device control unit that executes the water seal replenishment mode is controlled by the control unit for the toilet flushing device. The control device for the toilet flushing device controls the water seal replenishment mode to be executed repeatedly at intervals, A toilet flushing device that supplies flushing water to the toilet bowl using overflow water from a flushing tank, wherein the amount of flushing water dispensed from the second time onward is greater than the amount of flushing water dispensed the first time.

12. A control device for a toilet flushing device that controls a toilet flushing device that supplies flushing water to the toilet bowl using overflow water from a flushing tank, When a predetermined time has elapsed since the toilet bowl was flushed, a water seal replenishment mode is executed to supply the flushing water to the water reservoir of the toilet bowl. The toilet flushing device is controlled to repeatedly execute the aforementioned water seal replenishment mode at intervals. A control device for a toilet bowl flushing device, wherein the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is executed for the second time or later is less than the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is executed for the first time.

13. A control device for a toilet flushing device that controls a toilet flushing device that supplies flushing water to the toilet bowl using overflow water from a flushing tank, After setting the water seal replenishment mode to supply the flushing water to the water reservoir of the toilet bowl, the water seal replenishment mode is executed. The toilet flushing device is controlled to repeatedly execute the aforementioned water seal replenishment mode at intervals. A control device for a toilet bowl flushing device, wherein the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is executed for the second time or later is less than the amount of flushing water supplied to the flushing tank when the water seal replenishment mode is executed for the first time.

14. Controlled by a toilet flushing device control device according to any one of claims 12 to 13, A toilet flushing device in which the variation in the amount of flushing water discharged from the flushing tank to the toilet bowl in the water seal replenishment mode is smaller than the variation in the amount of flushing water supplied from the flushing tank to the toilet bowl in the toilet bowl flushing mode.

15. Controlled by a toilet flushing device control device according to any one of claims 12 to 13, A toilet flushing device in which the time from when the supply of the flushing water to the flushing tank is started for the first time until the flushing water is discharged from the outlet formed in the toilet bowl by the overflow water is shorter than the time from when the supply of the flushing water to the flushing tank is started for the second time until the flushing water is discharged from the outlet formed in the toilet bowl by the overflow water.

16. A control device for a toilet flushing device according to any one of claims 1 to 4, The aforementioned toilet bowl, A toilet flushing device that supplies the aforementioned flushing water to the toilet bowl, A toilet equipped with a toilet bowl.

17. A remote controller for setting the water seal replenishment mode of a toilet flushing device control device according to any one of claims 1 to 4.

Images