JP7270897B2 - flush toilet device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet device, and more particularly to a flush toilet device that is washed with flush water and discharges waste.

Conventionally, as shown in Japanese Unexamined Patent Application Publication No. 2002-100002, a pressurizing pump that pressurizes wash water stored in a water storage tank so as to cause it to be discharged from a jet spout, and a pressure pump that is provided in the water storage tank so as to detect the water level in the water storage tank. A flush toilet system with a float switch is known.
If the float switch does not detect the water level in the water storage tank when flush water is supposed to be stored in the water storage tank of such a flush toilet device, the water level in the water storage tank may drop due to damage to the water storage tank. There is a possibility that it has not been detected, and in order to eliminate the risk of water leakage due to damage to the water storage tank, the water storage tank and the toilet bowl have been suspended.

JP 2005-264469 A

However, even if the float switch does not sense the water level in the water tank, the water tank may not be damaged. For example, if only the float switch fails and the float switch does not detect the water level in the water storage tank, there is no risk of water leakage from the water storage tank, and there is no problem even if the toilet body continues to be usable. Even in such a case, if the usable state of the toilet bowl body is stopped, the toilet bowl body cannot be used even though there is no problem even if the usable state of the toilet bowl body is continued. There is a problem that it is not good.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the problems and problems of the prior art described above. To provide a flush toilet device capable of continuing the usable state of a toilet bowl main body in the case of failure of a float switch for detecting an upper specified water level and improving convenience for a user. It is an object.

To achieve the above object, the present invention provides a flush toilet device that is flushed with flush water to discharge waste, comprising a toilet bowl body, a flush water tank that stores flush water for flushing the toilet bowl body, A water supply device that supplies flush water into the flush water tank, a pump device that supplies flush water in the flush water tank to the toilet bowl body, and a current value of the pump device that can be detected and the pump device is controlled. A control device and a float switch for detecting the specified upper water level of the cleaning water tank, wherein the control device detects the specified upper water level of the cleaning water tank, the control device detects the specified upper water level of the cleaning water tank. and a timer control mode in which cleansing water is supplied by the water supply device until at least a predetermined time has elapsed since the start of supply of the water, and in the timer control mode, after a predetermined time has elapsed since the start of supplying cleansing water, the pump device is driven to drive the pump. a water storage judgment mode for detecting a current value during operation of the device and judging whether or not the washing water tank is filled with washing water based on the detected current value; When it is determined by the water storage determination mode that the flush water tank is filled with flush water, the pump device can be driven so as to keep the toilet body in a usable state. and when it is determined by the water storage determination mode that the flush water tank has not been filled with flush water, the toilet body is made to stop being usable. It is characterized in that the determination to prohibit the driving of the pump device is made immediately.
In the present invention configured as described above, the control device drives the pump device after a lapse of a predetermined time from the start of supply of cleansing water in the timer control mode, and detects the current value during driving of the pump device. It also has a water storage judgment mode for judging whether or not the washing water tank is filled with washing water based on the detected current value. As a result, when it is determined in the water storage determination mode that the flush water tank is filled with flush water, the control device determines whether the toilet bowl main body is in a usable state (the user cannot use the toilet bowl). It is determined that the pump device can be driven so that the main body can be used continuously, and the washing water tank has not been filled with washing water in the water storage judgment mode. If so, it can be determined to prohibit the driving of the pump device so as to stop the usable state of the toilet body.
Therefore, if the float switch that detects the specified upper water level fails and the float switch does not detect the specified upper water level of the wash water tank, and a predetermined time has elapsed since the start of supply of cleansing water in the timer control mode, the control device will: If it can be determined by the water storage determination mode that the flush water tank has been filled with flush water, the control device determines that the float switch for detecting the specified upper water level has failed, and the toilet bowl body. can be enabled to drive the pumping device to continue the availability of the
On the other hand, the float switch does not detect the specified upper water level of the wash water tank due to, for example, a malfunction of the pump device, a malfunction of the water shutoff valve, or water leakage from the wash water tank. When the time has passed, if the control device can determine that the cleaning water tank has not been filled with cleaning water in the water storage determination mode, the control device determines that the pump device has failed and the water has stopped. It is possible to prohibit the driving of the pump device so as to stop the usable state of the toilet bowl main body by judging that there is a malfunction of the plug or water leakage from the flush water tank.
Therefore, in the event of a failure such as water leakage from the flush water tank, the usable state of the toilet is suspended, and in the event of a failure of the float switch that detects the specified water level at the top, the usable state of the toilet is maintained. can be continued, and the user's convenience can be improved.

In the present invention, preferably, the water storage determination mode of the control device is such that the current value during the driving of the pump device is set to the value when air enters the pump device during the period from the start of driving of the pump device to the stop of driving of the pump device. If the current reaches the current value range, it is determined that the cleaning water tank was not filled with cleaning water, and the pumping device is operated until the pumping device is stopped. When the electric current value during driving does not reach the electric current value range when air enters the pump device, it is judged that the washing water is stored in the washing water tank to the full state.
In the present invention configured as described above, the water storage determination mode of the control device is such that the current value during the driving of the pump device is set to the amount of air flowing through the pump device during the period from the start of driving of the pump device to the stop of driving of the pump device. If the current value reaches the current value range in which , it is determined that the cleaning water tank has not been filled with cleaning water, and the pump device is operated until it is stopped. If the current value during operation of the pump device does not reach the current value range when air enters the pump device, the cleaning water tank is filled with cleaning water. It can be judged that
Therefore, it is possible to determine whether or not air is entering the pump device based on the current value during driving of the pump device, and whether or not the cleaning water tank is filled with cleaning water. can be determined relatively easily and accurately.

In the present invention, preferably, the control device causes the notification device to notify the failure of the float switch when it is determined in the timer control mode that a predetermined period of time has elapsed since the supply of cleansing water was started.
In the present invention configured as described above, the controller judges that the float switch is out of order when it is judged that a predetermined time has passed since the supply of flush water was started in the timer control mode, and the toilet body can be used. The user can be notified of the failure of the float switch by the notification device while continuing the enabled state. In addition, since the control device determines that the toilet bowl body remains usable, it is possible to prevent the user from remaining unaware of the failure of the float switch. Furthermore, even if the user recognizes the failure of the float switch, the user can continue to use the toilet body until the float switch is repaired.

In the present invention, preferably, based on the control device receiving a first control start command, the control device operates in the timer control mode after a predetermined time has elapsed since the start of supply of cleaning water, the notification device to suspend the notification of the failure of the float switch, and the control device receives the second control start command for the next cleaning request after the first control start command, or the first control start command If a predetermined time has elapsed since the supply of cleaning water was started continuously in the timer control mode, the above-mentioned The control device causes the notification device to notify the failure of the float switch.
In the present invention configured as described above, when the control device receives the first control start command, the control device operates in the timer control mode, and after a predetermined time has elapsed since the start of supply of the cleaning water, the notification device The notification of the failure of the float switch by is suspended, and the control device receives the second control start command for the next cleaning operation request of the first control start command, or the first control start command Even if the second and subsequent control start commands for the next and subsequent cleaning requests are continuously received, when a predetermined time has elapsed since the supply of cleaning water was started continuously in the timer control mode, the control device , the notification device notifies the failure of the float switch. As a result, in the case where the float switch accidentally does not operate normally due to being unused for a long period of time, etc., and the float switch does not actually malfunction, the control device will make the second request for the next cleaning operation. Failure of the float switch if the float switch operates in the cleaning operation started by receiving the control start command or by continuously receiving the second and subsequent control start commands for the next and subsequent cleaning requests. can be prevented from being falsely reported. Therefore, it is possible to further improve the determination accuracy of the failure of the float switch, and it is possible to further suppress the erroneous notification of the failure of the float switch.

According to the flush toilet device of the present invention, in the event of failure such as leakage of water from the flush water tank, the usable state of the toilet body is suspended, and in the event of failure of the float switch for detecting the specified upper water level. Therefore, the usable state of the toilet body can be continued, and the user's convenience can be improved.

1 is an overall configuration diagram showing a flush toilet device according to an embodiment of the present invention; FIG. FIG. 2 is a top view of the wash water tank device of FIG. 1; 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. In the flush toilet device according to one embodiment of the present invention, a flow chart showing the control operation of the control device when the control device receives a control start command and the float switch does not detect the upper specified water level of the flush water tank. is. In the flush toilet device according to one embodiment of the present invention, a flow chart showing the control operation of the control device when the control device receives a control start command and the float switch does not detect the upper specified water level of the flush water tank. is. FIG. 4 is a diagram showing the relationship between the driving time of the pump device and the current value in the flush toilet device according to one embodiment of the present invention;

Next, a flush toilet device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, referring to FIG. 1, the structure of a flush toilet device according to one embodiment of the present invention will be described. Here, FIG. 1 is an overall configuration diagram showing a flush toilet device according to one embodiment of the present invention.

As shown in FIG. 1, a flush toilet device 1 equipped with a flush water tank device according to one embodiment of the present invention is a flush toilet device that is flushed with flush water and discharges waste. The flush toilet device 1 includes a toilet bowl body 2, a water supply device 4 arranged behind the toilet bowl body 2, and a flush water tank device 6 arranged behind the toilet bowl body 2. - 特許庁

The toilet body 2 is made of ceramics. The toilet body 2 is formed with a bowl portion 12 for receiving waste, a drainage trap pipe 14 extending from the bottom portion of the bowl portion 12, a jet water outlet 16 for jet water spouting, and a rim water outlet 18 for spouting rim water. It is The jet outlet 16 is formed at the bottom of the bowl portion 12 and is arranged substantially horizontally toward the inlet of the drain trap line 14 to discharge wash water toward the drain trap line 14 . ing. The rim spout 18 is formed in the upper left rear portion of the bowl portion 12 and discharges cleansing water along the upper edge of the bowl portion 12 .

The drain trap pipe line 14 is composed of an inlet portion 14a, a trap ascending pipe 14b ascending from the inlet portion 14a, and a trap descending pipe 14c descending from the trap ascending pipe 14b. and the top portion 14d. Here, the drain pipe 8 is connected to the lower end of the trap descending pipe 14c of the drain trap pipe line 14. As shown in FIG.

The flush toilet device 1 according to this embodiment is directly connected to a water supply that supplies flush water, and flush water is discharged from the rim spout 18 by the water supply pressure of the water supply. As for jet water spouting, as will be described later, the washing water stored in the washing water tank 20 of the washing water tank device 6 is pumped out by the pump device 22 to be discharged from the jet water spouting port 16 at a large flow rate. ing.

Next, the water supply device 4 of the flush toilet device 1 according to this embodiment will be described.
As shown in FIG. 1 , the water supply device 4 supplies washing water into the washing water tank 20 of the washing water tank device 6 . The water supply device 4 is provided with a water supply channel 24 through which cleansing water is supplied from the water supply. The water supply channel 24 includes, from the upstream side, a stop cock 26, a strainer 28, a branch fitting 30, a constant flow valve 32, and a diaphragm. A type electromagnetic on-off valve 34 and a water supply passage switching valve 36 are provided.

A rim-side water supply channel 38 for supplying cleansing water to the rim spout 18 and a tank-side water supply channel 40 for supplying cleansing water to the cleansing water tank 20 are connected to the downstream side of the water supply channel switching valve 36 . It is

The wash water that has passed through the electromagnetic on-off valve 34 is directed by the water supply passage switching valve 36 from the rim side water supply passage 38 to the rim spout 18 and/or from the tank side water supply passage 40 to the tank side. It is supplied to tank 20 . As described above, the flush toilet device 1 uses the water pressure (direct pressure) of the tap water to supply water for rim spouting to clean the toilet bowl, and furthermore, for jet water spouting, the water stored in the flush water tank 20 is used to clean the toilet bowl. This is a hybrid flush toilet apparatus having a hybrid type (water supply direct pressure type + tank water supply type) water supply device that pressurizes water by a pump device 22 and discharges it from a jet spout 16 . A rim water spouting vacuum breaker 48 is provided in the rim side water supply passage 38 . The tank-side water supply passage 40 is also provided with a vacuum breaker 42 as a check valve. A ball-type check valve 43 is provided at the connecting portion between the tank-side water supply passage 40 and the wash water tank 20 . A ball type check valve 44 is also provided at the connecting portion between the return pipe line 50 and the washing water tank 20 .

Next, the cleaning water tank device 6 will be described in detail with reference to FIGS. 1 to 3. FIG.
2 is a top view of the washing water tank apparatus of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG.
The flushing water tank device 6 includes a flushing water tank 20 that stores flushing water for flushing the toilet bowl main body 2, and the flushing water that is taken in from a water inlet 45a of a water pipe 45 provided in the flushing water tank 20 and supplied to the toilet bowl main body 2. a float switch 52 provided in the wash water tank 20; an operation unit 55 that receives an operation by the user; A device 54 and a notification device 56 for notifying a failure of the float switch 52 are provided.

At least the lower portion of the flush water tank 20 is attached to the rear upper portion of the toilet body 2 . The flush water tank 20 is a so-called low-silhouette tank that has a relatively low height when attached to the toilet body 2 .

As shown in FIGS. 1 and 3 , the pump device 22 is a pump that supplies flush water in the flush water tank 20 to the toilet body 2 . The pump device 22 enters from the side of the wash water tank 20 and is connected to a water pipe 45 extending to the bottom thereof. The pump device 22 is also connected to a jet-side water supply passage 46 extending to the jet water spout 16 . The pump device 22 sucks and pressurizes the wash water stored in the wash water tank 20 and supplies it to the jet water spout 16 . The water conduit 45 may not only pass through the cleansing water tank 20 , but may also be connected from the outside of the cleansing water tank 20 to a water intake port 45 a provided at the bottom of the cleansing water tank 20 .

As shown in FIG. 1, an overflow channel 70 is provided between the cleaning water tank 20 and the jet-side water supply channel 46 . The overflow channel 70 is connected to the jet-side water supply channel 46 . A flapper valve 72 that is a check valve is attached to the overflow passage 70 .

The float switch 52 detects an upper specified water level that serves as a reference for the full water level in the upper part of the wash water tank. When the water level in the wash water tank 20 rises and reaches the specified upper water level, the float switch 52 transmits a detection signal indicating that the specified upper water level has been reached. When the controller 54 receives this detection signal, it can determine that the cleaning water tank is almost full. The upper specified water level is a water level that serves as a reference for the full water level, but may be the full water level. The full water level is the stop water level of the wash water tank 20 specified for normal washing. The full water level includes not only the full water level but also water levels in the vicinity of the full water level.

As shown in FIG. 3, the float switch 52 includes a stem (shaft portion) 64 forming a rod-shaped shaft portion, and a buoyant force corresponding to the water level in the wash water tank 20. and a float portion 62 that moves up and down along. The stem 64 extends downward in the vertical direction so as to hang down from an attachment portion attached to the upper portion of the wash water tank 20 . The stem 64 has a reed switch (not shown) inside the stem 64 . A lead switch of the float switch 52 is electrically connected to the control device 54 . The float portion 62 moves up and down according to the water level, and the ON state (ON state) and OFF state (OFF state) of the reed switch, that is, the float switch 52 changes according to the position of the float portion 62 . The float switch 52 is ON when the water level in the flushing water tank 20 is at a stop water level WL0 (standby water level), which is the full water level, and is OFF when the water level drops below the specified upper water level WL1. Detect the state.
When the water level is lower than the upper specified water level WL1, the float switch 52 is in the OFF state, and when the water level rises again and reaches the upper specified water level WL1, it is detected that it is in the ON state. Therefore, the float switch 52 transmits a detection signal indicating that the water level in the wash water tank 20 has reached the specified upper water level WL1 when it reaches the specified upper water level WL1.

The control device 54 is electrically connected to the electromagnetic on-off valve 34, the water supply channel switching valve 36, the pump device 22, the float switch 52, the operation unit 55, the notification device 56, etc., and can mutually transmit and receive electrical signals. Each functional part can be electrically operated. For example, the control device 54 has a function of controlling the opening/closing operation of the electromagnetic on-off valve 34, the switching operation of the water supply passage switching valve 36, the number of rotations of the pump device 22, the operating time, and the like, and the light emitting state of the notification device 56. . The control device 54 also acquires information such as the current value (A) or the rotation speed (rpm) of the pump device 22 . The control device 54 receives an operation signal from an operation unit 55 such as a remote control switch, or controls each device according to a stored program or the like. The control device 54 includes a storage device (not shown) such as a memory and an arithmetic device (not shown) that can control each device. The control device 54 has a function of executing, for example, a timer control mode, a water storage determination mode, a safety timer control mode, etc. by controlling each device.

When the float switch 52 does not detect the specified upper water level of the cleaning water tank 20, the control device 54 performs timer control to supply cleaning water from the water supply device 4 until at least a predetermined time has elapsed since the water supply device 4 started supplying cleaning water. mode and timer control mode, the pump device 22 is driven after a predetermined time has passed since the start of supply of cleansing water, the current value during driving of the pumping device 22 is detected, and the cleansing water tank 20 is detected based on the detected current value. The washing water tank 20 is provided with a water storage judgment mode for judging whether or not the wash water is fully stored in the washing water tank 20, and the washing water tank 20 is in a state in which the washing water is stored to the full state in the water storage judgment mode. If it is determined that the toilet bowl body 2 is in a usable state (a state in which the user can use the toilet bowl body 2), it is determined that the pump device 22 can be driven, and flushing is performed in the water storage determination mode. When it is determined that flush water has not been stored in the water tank 20 to the full state, it is determined to prohibit driving of the pump device 22 so as to stop the usable state of the toilet body 2.例文帳に追加.

The water storage determination mode of the control device 54 is when the current value during driving of the pump device 22 reaches the current value range when air enters the pump device 22 during the period from the start of driving of the pump device 22 to the stop of driving of the pump device 22. , it is determined that the washing water tank 20 has not been filled with washing water, and the current value during driving of the pump device 22 is reduced from the start of driving of the pump device 22 to the stop of driving. If the electric current does not reach the range of the current value when air enters the device 22, it is determined that the cleaning water tank 20 is filled with cleaning water.

The control device 54 causes the notification device 56 to notify the failure of the float switch 52 when it is determined in the timer control mode that a predetermined period of time has elapsed since the start of supply of cleansing water.
When the control device 54 receives the first control start command, the control device 54 operates in the timer control mode after a predetermined period of time has passed since the start of the supply of washing water. The notification is suspended, and the control device 54 receives the second control start command (next time) for the cleaning operation request next time after the first control start command, or the first control start command The control device 54 continuously starts the washing water in the timer control mode based on the continuous reception of the control start command for the second and subsequent times (for example, the second and third times) for the next and subsequent washing requests. When it is determined that a predetermined period of time has passed since the start of supply of , the control device 54 causes the notification device 56 to notify that the float switch 52 has failed.

The operation unit 55 is an operation device that receives a user's operation requesting washing, and transmits a control start command to the control device 54 upon receiving a user's operation.

The notification device 56 receives a command from the control device 54 and notifies the user of the failure of the float switch 52 . The notification device 56 notifies the failure of the float switch 52 when it is determined that the float switch 52 has failed after a predetermined period of time has elapsed since the supply of cleansing water was started in the timer control mode. The notification device 56 is, for example, a light-emitting device such as an LED, or a device that emits sound. According to the notification device 56 , when the float switch 52 fails, the user can be notified of the failure of the float switch 52 while the toilet body 2 continues to be usable.

4A, 4B and 5, when the control device receives a control start command in the flush toilet device according to the embodiment of the present invention, the float switch detects the specified upper water level of the flush water tank. The control operation (action) of the control device in the case where it is not installed will be described.
FIG. 4A shows the control of the control device when the float switch does not detect the upper specified water level of the flush water tank when the control device receives a control start command in the flush toilet device according to one embodiment of the present invention. FIG. 4B is a flow chart showing the operation, and FIG. 4B shows that in the flush toilet device according to one embodiment of the present invention, the float switch detects the upper specified water level of the flush water tank when the control device receives a control start command. FIG. 5 is a flow chart showing the control operation of the control device when there is no flush toilet device, and FIG. In FIG. 4, S indicates each step.

First, as shown in FIG. 4A, when the control device 54 receives a control start command in the standby state, the control device 54 starts the control operation from the start.
Next, in step S<b>1 , the control device 54 determines whether the float switch 52 has detected the specified upper water level of the wash water tank 20 . When the float switch 52 detects the specified upper water level of the flush water tank 20 (NO), the control device 54 proceeds to step S2 to execute a normal toilet bowl flushing operation. If the float switch 52 does not detect the upper specified water level of the wash water tank 20 (if YES), the control device 54 turns the float switch 52 on when water is not stored again after the start of use after the construction. It is determined that the control is effective under special circumstances such as failure, failure of the pump device, failure of the stop valve, or water leakage from the washing water tank, and the process proceeds to step S3.

At step S2, the control device 54 causes a normal toilet cleaning operation to be performed. A normal toilet bowl cleaning operation is, for example, a general toilet bowl cleaning operation in which the pump device is driven to supply flush water from the flush water tank 20 to the toilet body 2, and then the water supply device 4 supplies water to the flush water tank 20. It is an operation, and detailed description is omitted.

In step S3, the controller 54 determines that the wash water is not stored in the wash water tank 20 because the float switch 52 does not detect the specified upper water level of the wash water tank 20. Therefore, in order to temporarily store wash water in the wash water tank 20 , the water supply device 4 starts supplying water to the wash water tank 20 .

In step S<b>4 , the control device 54 determines whether the float switch 52 has detected the specified upper water level of the wash water tank 20 . If the float switch 52 detects the specified upper water level of the cleaning water tank 20 (if YES), the control device 54 determines that the float switch 52 is operating normally and that the cleaning water reaches the specified upper water level of the cleaning water tank 20. It is determined that the water has been stored up to , and the process proceeds to step S5. If the float switch 52 does not detect the specified upper water level of the wash water tank 20 (NO), the controller 54 proceeds to step S6.

In step S5, the control device 54 executes a count reset for resetting the count of the number of cleaning operations in which the pump device 22 is driven in step S8 described later after YES is determined in step S6.

In step S6, the control device 54 determines whether or not a predetermined period of time has elapsed since the supply of wash water by the water supply device 4 was started in S3.
If the predetermined time has not elapsed since the supply of cleaning water by the water supply device 4 was started (NO), the control device 54 returns to step S4.
When a predetermined time has passed since the supply of cleaning water by the water supply device 4 (in the case of YES), the control device 54 controls that the cleaning water is washed even if the flow rate of the cleaning water supplied by the water supply device 4 is relatively small. Since it can be determined that the time expected to reach the upper specified water level of the water tank 20 has elapsed, the process proceeds to step S7.
In steps S3, S4, and S6, if the float switch 52 does not detect the upper specified water level of the wash water tank 20, the control device 54 keeps the water supply device 4 off until a predetermined time elapses from the start of supply of wash water by the water supply device 4. is running a timer control mode that supplies wash water by

In step S7, the controller 54 performs the cleaning operation in step S6 after receiving the control start command after the last cleaning operation in which the count reset in step S5 was performed (after the count reset in S5 was executed). After determining YES, it is determined whether or not the pump device 22 has been driven in step S8, which will be described later.
After executing the count reset in S5, the control device 54 determines YES in step S6 as described above, and if the driving of the pump device 22 in step S8, which will be described later, has not been performed, the control device 54 proceeds to step S8. move on.
After executing the count reset in S5, if the determination of YES is made in step S6 and the pump device 22 has been driven in step S8 to be described later, the control device 54 proceeds to step S16. move on.

In step S8, the control device 54 starts driving the pump device 22. As shown in FIG. The pump device 22 is rotated at a predetermined constant number of revolutions. A pump device 22 sucks the wash water stored in the wash water tank 20 and supplies the wash water to the toilet body 2 . The water level in the wash water tank 20 starts to drop from the stop water level WL0 (standby water level). After executing S8, the control device 54 proceeds to A in FIG. 4A, and from A in FIG. 4B to S9 in FIG. 4B.

In step S<b>9 , the control device 54 detects (obtains) the current value I(A) during driving of the pump device 22 .

In step S10, the control device 54 determines whether or not a predetermined time has passed since the pump device 22 started to be driven.
If a predetermined time has passed since the start of driving the pump device 22, the control device 54 proceeds to step S11.
If the predetermined time has not passed since the pump device 22 started to be driven, the control device 54 returns to step S10.

In step S<b>11 , the control device 54 stops driving the pump device 22 . When the driving of the pump device 22 is stopped, the supply of flush water from the flush water tank 20 to the jet spout 16 of the toilet body 2 is stopped.

In step S12, the control device 54 starts execution of a safety timer control mode for determining whether a predetermined time has passed since the driving of the pump device 22 was stopped in S11, and starts counting the passage of the predetermined time.

In step S<b>13 , the control device 54 determines whether the float switch 52 has detected the specified upper water level of the wash water tank 20 .
If the float switch 52 detects the specified upper water level of the cleaning water tank 20 (if YES), the control device 54 determines that the float switch 52 is operating normally and that the cleaning water reaches the specified upper water level of the cleaning water tank 20. It is determined that the water has been stored up to , and the process proceeds to step S15.
If the float switch 52 does not detect the specified upper water level of the wash water tank 20 (NO), the controller 54 proceeds to step S14.

In step S14, the control device 54 determines whether or not a predetermined period of time has elapsed since the count was started in S12.
If the predetermined time has not elapsed since the start of counting in S12 (NO), the control device 54 returns to step S13.
If a predetermined time has passed since the start of counting in S12 (if YES), the control device 54 controls the flow rate of the washing water supplied by the water supply device 4 after stopping the driving of the pump device 22 in S12, even if the flow rate is relatively small. Since it can be determined that the expected time for the wash water to reach the specified water level in the upper portion of the wash water tank 20 has elapsed, the process proceeds to step S15.

In step S<b>15 , the control device 54 stops the supply of wash water from the water supply device 4 into the wash water tank 20 . The water level in the wash water tank 20 is the stop water level WL0 (standby water level). The controller 54 goes to END and returns to the standby state (START in FIG. 4A).

So far, the control operation of the control device 54 when the control device 54 receives the first control start command has been described. Next, the control operation of the control device 54 when the control device 54 receives the second control start command will be described with reference to FIGS. 4A and 4B.
The control device 54 starts the first control when a predetermined condition is satisfied in a situation such as failure of the float switch 52, failure of the pump device, failure of the stop valve, or water leakage from the wash water tank 20. The control action when receiving the command may be different from the control action when receiving the second control start command. A description of the case where the control operation when receiving the second control start command and the control operation when receiving the first control start command is the same will be omitted.

When the control device 54 receives the second control start command, the control device 54 starts the control operation from the start. If the float switch 52 fails, the pump device fails, the stop valve fails, water leaks from the wash water tank 20, or the like, the float switch 52 does not detect the specified upper water level of the wash water tank 20. Therefore, the control device 54 executes steps S1, S3, S4, and S6 as described above, and proceeds to step S7.

In step S7, the controller 54 performs the cleaning operation in step S6 after receiving the control start command after the last cleaning operation in which the count reset in step S5 was performed (after the count reset in S5 was executed). After determining YES, it is determined whether or not the pump device 22 has been driven in step S8, which will be described later.
When the second control start command is received in a situation such as a failure of the float switch 52, a failure of the pump device, a failure of the stop cock, or water leakage from the wash water tank 20, the control device 54 For example, after the count reset in S5 is executed by the first use of the cleaning water tank 20 after construction (a long period of time may have elapsed since then), step After a determination of YES is made in S6, it is determined that the pump device 22 has been driven in step S8, which will be described later, and the process proceeds to step S16.
That is, the control device 54 controls the pump device after the first control start command in a situation in which failure of the float switch 52, failure of the pump device, failure of the stop valve, water leakage from the wash water tank 20, or the like is suspected. 22 is driven on a trial basis, based on the current value resulting from this drive, whether the float switch 52 has failed after the second control start command, or the pump device 22 has failed, or the water stop valve In order to distinguish whether it is a malfunction or water leakage from the wash water tank 20, the process proceeds to step S16.

In step S16, the control device 54 operates in the water storage judgment mode until the wash water tank 20 is filled with wash water based on the current value of the pump device 22 detected during the previous wash (during execution of the first control). It is determined whether or not water has been stored.
In the water storage determination mode of the control device 54, the current value during the driving of the pump device 22 is within the current value range when air enters the pump device 22 from the start of driving of the pump device 22 to the stop of driving after the lapse of a predetermined time. If it does, it can be determined that the wash water tank 20 was not filled with wash water (in the case of NO), so the process proceeds to step S17.

As indicated by the dotted line in FIG. 5, when no cleansing water is stored in the cleansing water tank 20, air enters from the driving start time t0 of the pumping device 22, and the current of the pumping device 22 is reduced to the driving start time t0. reaches a predetermined current value range I2. A predetermined current value range I2 is shown as a region between thin dotted lines in FIG. show. The predetermined current value range I2 is defined as a substantially constant level for each pumping device 22 when air enters the pumping device 22 . The predetermined current value range I2 is defined as a band having a predetermined current value width. When the current value of the pump device 22 reaches a predetermined current value range I2 regardless of the size of the wash water tank 20 or the amount of discharged wash water, the controller 54 indicates that air has entered the pump device 22. can be determined.

On the other hand, as indicated by the dashed line in FIG. 5, when the wash water tank 20 does not contain enough wash water to the stop water level WL0 (for example, the wash water tank 20 is filled halfway, such as about half). ), air enters the pump device 22 from t1 during driving, and the current of the pump device 22 reaches a predetermined current value range I1 at driving start time t0 from a predetermined current value range I1 at driving start time t1. In this manner, the control device 54 can determine, in the water storage determination mode, that the cleaning water tank 20 has not been filled with cleaning water. Therefore, since the wash water tank 20 was not fully filled with wash water, the control device 54 caused an event in which wash water was not stored in the wash water tank 20. It can be determined that there is a possibility of failure of the device 22 , failure of the stopcock, or failure of water leakage from the wash water tank 20 .
As described above, in step S16, the control device 54 determines that it is necessary to stop the usable state of the toilet body 2 in the case of the failure of the pump device 22, the failure of the stop cock, or the failure of water leakage from the flush water tank 20. Since it can be determined, the control device 54 proceeds to step S17.

In the water storage determination mode of the control device 54, the current value during driving of the pump device 22 did not reach the current value range I2 when air enters the pump device 22 from the start of driving of the pump device 22 to the stop of driving the pump device 22. In this case, it is determined that the washing water tank 20 has been filled with washing water, and the process proceeds to step S8.
As indicated by the solid line in FIG. 5, when the flush water tank 20 is sufficiently filled with flush water up to the stop water level WL0 (when the flush water tank 20 is full), the pump device 22 is driven at the start time. Washing water enters from t0, and the current of the pump device 22 reaches a predetermined current value range I1 from the drive start time t0. Since air does not enter the pump device 22 during the driving time of the pump device 22, the current corresponding to the cleaning water delivery load of the pump device 22 is maintained within the predetermined current value range I1. That is, the current value during driving of the pump device 22 does not reach the current value range I2 when air enters the pump device 22 from the driving start time t0 of the pump device 22 to the driving stop time t2. In this manner, the control device 54 can determine that the cleaning water tank 20 has been filled with cleaning water in the water storage determination mode. Therefore, the control device 54 determines that the float switch 52 has not detected the upper specified water level and that the washing water tank 20 is filled with washing water because the washing water tank 20 has been filled with washing water. It can be determined that there is a possibility of a failure, for example, a failure of the float switch 52, which causes an event in which flush water is filled up. If the float switch 52 fails, the control device 54 can determine that the usable state of the toilet body 2 can be continued even if the float switch 52 does not detect the upper specified water level. The controller 54 proceeds to step S8. The control operations after step S8 are the same as those in steps S8 to S15 described above, so description thereof will be omitted.

In step S17, the control device 54 suspends the usable state of the toilet body 2, and suspends and terminates the control operation.

In order to further improve the determination accuracy of the failure of the float switch 52, the control device 54 performs the The control device 54 may determine that the float switch 52 is out of order when it is continuously determined in the timer control mode that a predetermined time has elapsed since the supply of cleansing water was started.
More specifically, based on the control device 54 having received the first control start command, the control device 54 determines in the timer control mode that a predetermined time has elapsed since the supply of cleaning water was started. 56 suspends notification of the failure of the float switch 52, and the control device 54 receives the second control start command for the next cleaning request after the first control start command, or the first control start Based on the fact that the second and subsequent control start commands for the next and subsequent cleaning requests have been continuously received, the timer control mode continues to perform the control when a predetermined time has elapsed since the start of supply of cleansing water. The device 54 determines that the float switch 52 is out of order, and causes the notification device 56 to notify the float switch 52 of the failure. Therefore, such control processing by the control device 54 can further improve the determination accuracy of the failure of the float switch 52 .

The mode for carrying out the present invention is not limited to the above, and other modifications can be applied.
The float switch 52 may be composed of a first float switch for detecting the upper specified water level, which is the reference of the full water level, and a second float switch for detecting another specified water level. Even when the float switch 52 is composed of the first float switch and the second float switch, if both the first float switch and the second float switch are in a state where the water level is not detected, for example, the first float switch and the second float switch When both of the two float switches are out of order, the processing of this embodiment can be executed by the control operation of the control device shown in the flow charts of FIGS. 4A and 4B. Therefore, if the first float switch that detects the specified upper water level fails and the first float switch does not detect the specified upper water level of the wash water tank 20, and a predetermined time has elapsed since the start of supply of cleansing water in the timer control mode, The control device 54 can determine that the flush water tank 20 is filled with flush water in the water storage determination mode, and the pump device 22 is operated so that the toilet body 2 can continue to be used. can be driven.
On the other hand, the first float switch does not detect the upper specified water level of the wash water tank 20 due to, for example, a malfunction of the pump device 22, a malfunction of the water shutoff valve, or water leakage from the wash water tank 20. When a predetermined period of time has passed since the start of the supply of , the control device 54 can determine that the flush water tank 20 was not filled with flush water in the water storage determination mode, and the toilet body 2 can be used. Activation of the pumping device 22 can be inhibited so as to terminate the enabling state.

Next, an outline of the normal flushing (large flushing mode) operation (action) performed in step S2 of the control device 54 in the flush toilet device 1 according to the embodiment of the present invention will be described.

As shown in FIG. 3, in the standby state, the water level in the wash water tank 20 is the stop water level WL0. When the control device 54 receives a control start command to start washing and the float switch 52 detects the upper specified water level of the flush water tank 20 (in the case of NO), the control device 54 executes a normal toilet flushing operation. . The control device 54 opens the electromagnetic on-off valve 34 to allow the wash water to flow into the water supply path 24 . Next, the opening degree of the water supply passage switching valve 36 is gradually switched from the tank side fully open state (cleansing water tank side 100%) to the rim side fully open state (rim side 100%), and a small amount of cleansing water is supplied to the rim spout 18. Then, the washing water starts to be spouted from the rim spout 18 . The wash water spouted forward from the rim spout 18 flows down while swirling along the inside of the bowl portion 12 to wash the inside of the bowl portion 12 as rim washing.

In addition, the control device 54 starts driving the pump device 22 in order to perform jet water spouting. A pump device 22 supplies the wash water in the wash water tank 20 to the jet water spout 16 and spouts the wash water from the jet water spout 16 . When the pump device 22 starts to be driven, the wash water in the wash water tank 20 is sucked toward the water intake portion 45a as indicated by the arrow F0 (see FIG. 3), and the water pipe 45 is drawn from the water intake portion 45a. and supplied to the toilet body 2.

The control device 54 stops driving the pump device 22 after a predetermined time has elapsed since the driving of the pump device 22 was started. When the driving of the pump device 22 is stopped, the supply of flush water from the flush water tank 20 to the jet spout 16 of the toilet body 2 is stopped. The water level in the wash water tank 20 is the dead water level WL2.

Further, the control device 54 causes the bowl portion 12 to be washed with the washing water supplied from the rim spout 18 . Next, the control device 54 gradually switches the opening degree of the water supply passage switching valve 36 from the rim side fully open state (rim side 100%) to the tank side fully open state (rinsing water tank side 100%). Therefore, washing water is supplied from the water supply passage 24 into the washing water tank 20 through the tank side water supply passage 40, and the water level in the washing water tank 20 rises.

When the water level in the wash water tank 20 further rises to the upper specified water level WL1, the float switch 52 changes from OFF to ON.

Based on the detection of the ON state of the float switch 52, the control device 54 switches the electromagnetic on-off valve 34 from the open state to the closed state after a predetermined time has elapsed from this detection. Therefore, the water supply to the cleaning water tank 20 is stopped. The water level in the wash water tank 20 is a stop water level WL0 above the upper specified water level WL1. Controller 54 returns to the standby state.

According to the flush toilet device 1 according to the embodiment of the present invention described above, the control device 54 drives the pump device 22 after a predetermined period of time has elapsed from the start of supply of flush water in the timer control mode. A water storage judgment mode is provided for detecting a current value during driving and judging whether or not the wash water tank 20 is filled with wash water based on the detected current value. As a result, when it is determined in the water storage determination mode that flush water has been stored in the flush water tank 20 to the full state, the control device 54 sets the toilet body 2 to the usable state (when the user It is determined that the pump device 22 can be driven so that the toilet body 2 can be used continuously, and the flush water tank 20 is not filled with flush water in the water storage determination mode. If it is determined that the toilet bowl main body 2 is in a usable state, it can be determined to prohibit the pump device 22 from being driven. Therefore, if the float switch 52 that detects the specified upper water level fails and the float switch 52 does not detect the specified upper water level of the wash water tank 20 and a predetermined time has elapsed since the supply of cleansing water was started in the timer control mode, the control If the apparatus 54 can determine in the water storage determination mode that the flush water tank 20 is filled with flush water, the control unit 54 determines that the float switch 52 for detecting the specified upper water level has failed. By making a decision, it is possible to enable the driving of the pump device 22 so that the toilet body 2 can continue to be used. On the other hand, the float switch 52 does not detect the upper specified water level of the wash water tank 20 due to, for example, a failure of the pump device 22, a malfunction of the water shutoff valve, or water leakage from the wash water tank 20, and the wash water is stopped in the timer control mode. When the control device 54 can determine in the water storage determination mode that the cleaning water tank 20 has not been fully filled with cleansing water after a predetermined period of time has elapsed since the start of supply, the control device 54 The driving of the pump device 22 can be prohibited so as to stop the usable state of the toilet bowl main body 2 by judging that the pump device 22 is out of order, the water stop valve is out of order, or water is leaking from the flush water tank 20 . Therefore, in the event of a failure such as water leakage from the flush water tank 20, the usable state of the toilet bowl body 2 is suspended, and in the event of a failure of the float switch 52 for detecting the specified upper water level, the toilet bowl body 2 can be continued, and convenience for the user can be improved.

Furthermore, according to the flush toilet device 1 according to the present embodiment, the water storage determination mode of the control device 54 is such that the current value during driving of the pump device 22 is set to When the current value reaches the range when air enters the pump device 22, it is determined that the wash water tank 20 was not filled with wash water, and the pump device 22 is driven from start to stop. If the current value during driving of the pump device 22 does not reach the current value range when air enters the pump device 22 during this period, the washing water tank 20 is filled with washing water. It can be judged that it was Therefore, it is possible to determine whether or not air is entering the pump device 22 based on the current value during driving of the pump device 22, and the washing water tank 20 is filled with washing water. It is possible to relatively easily and accurately determine whether or not the

Further, according to the flush toilet device 1 according to the present embodiment, the control device 54 determines that the float switch 52 has failed when it is determined that a predetermined time has elapsed since the supply of flush water was started in the timer control mode. Thus, the failure of the float switch 52 can be notified to the user by the notification device 56 while the usable state of the toilet body 2 is continued. In addition, since the control device 54 determines that the toilet body 2 can continue to be used, it is possible to prevent the user from remaining unaware of the failure of the float switch 52 . Furthermore, even if the user recognizes the failure of the float switch 52, the user can continue to use the toilet body 2 until the float switch 52 is repaired.

Further, according to the flush toilet device 1 according to the present embodiment, when the control device 54 receives the first control start command, the control device 54 operates in the timer control mode for a predetermined period of time from the start of supply of flush water. After the lapse of time, the notification of the failure of the float switch 52 by the notification device 56 is suspended, and the control device 54 receives the second control start command for the next cleaning operation request after the first control start command; Alternatively, based on the continuous reception of the second and subsequent control start commands for the next and subsequent cleaning requests after the first control start command, the timer control mode continues from the start of the supply of cleaning water to the predetermined time. When the time has elapsed, the control device 54 causes the notification device 56 to notify the failure of the float switch 52 . As a result, in the case where the float switch 52 accidentally does not operate normally due to being unused for a long period of time, etc., and the float switch 52 does not actually malfunction, the control device 54 can be used to request the next cleaning operation. If the float switch 52 operates in the cleaning operation started by receiving two control start commands or by continuously receiving the second and subsequent control start commands for the next and subsequent cleaning requests, It is possible to prevent erroneous notification of the failure of the float switch 52 . Therefore, it is possible to further improve the determination accuracy of the failure of the float switch 52, and to further suppress the false notification of the failure of the float switch 52.

1 flush toilet device 2 toilet bowl body 4 water supply device 20 flush water tank 22 pump device 26 stop cock 52 float switch 54 control device 56 alarm device I current value I1 current value range I2 current value range WL0 stop water level WL1 upper specified water level WL2 dead water water level

Claims (3)

A flush toilet device that is flushed with flush water and discharges waste,
a toilet bowl body;
a flushing water tank for storing flushing water for flushing the toilet body;
a water supply device for supplying wash water into the wash water tank;
a pump device for supplying flush water in the flush water tank to the toilet body;
a control device capable of detecting a current value of the pump device and controlling the pump device;
and a float switch for detecting the specified upper water level of the wash water tank ,
The control device is
a timer control mode in which, when the float switch does not detect the specified upper water level of the wash water tank, the wash water is supplied from the water supply device until at least a predetermined time elapses from the start of supply of wash water by the water supply device;
In the timer control mode, the pump device is driven after a predetermined time has passed since the supply of cleansing water was started, and the current value during driving of the pump device is detected. When the current value reaches the current value range for entering, it is determined that the cleaning water was not stored in the cleaning water tank to the full state, and the detected current value causes air to enter the pump device. A water storage judgment mode is provided in which it is judged that the washing water tank is filled with washing water when the current value does not reach the current value range,
When it is determined by the water storage determination mode that the flush water tank is filled with flush water, the pump device is driven so that the toilet bowl body can continue to be used. make decisions that allow
When it is determined in the water storage determination mode that the flush water tank has not been filled with flush water, the pump device is driven so as to stop the usable state of the toilet body. A flush toilet device characterized by making a judgment to prohibit the 2. The flush toilet apparatus according to claim 1 , wherein the control device causes a notification device to notify the failure of the float switch when a predetermined time has elapsed from the start of flush water supply in the timer control mode. When the controller receives the first control start command, after a predetermined period of time has passed since the start of supply of cleansing water by the controller in the timer control mode, the failure of the float switch is detected by the notification device. The notification is suspended, and the control device receives the second control start command for the next cleaning request of the first control start command, or the second control start command for the next cleaning request after the first control start command. When a predetermined time has elapsed since the supply of cleaning water was started continuously in the timer control mode, the control device controls the notification device 3. The flush toilet device according to claim 2 , wherein the failure of the float switch is notified by.

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