JP7421728B2 - Flush toilet device - Google Patents

Description

The present invention relates to a flush toilet device, and more particularly to a flush toilet device that supplies flush water stored in a flush water tank to a toilet body using a pump device.

Conventionally, flush toilet devices that are flushed with flush water have consisted of a toilet body, a flush water tank that stores flush water, and a pump device that supplies flush water stored in the flush water tank to the toilet body. 2. Description of the Related Art Flush toilet devices equipped with a control device for controlling a pump device, and a control device for controlling a pump device are widely known.

For example, Patent Document 1 discloses an example of such a flush toilet device. As the pump device, a pump device with a built-in motor is generally used.

Conventionally, such pump devices are driven using the voltage of the commercial power source (100V), and the drive control section that drives the pump device is provided in the primary side circuit section that is operated by the voltage of the commercial power source. There is.

An example of the configuration of a conventional control circuit is shown in FIG. In the circuit shown in FIG. 9, a primary side circuit section 103 is connected to an AC commercial power source 101 via a rectifier section 102. The primary side circuit section 103 is a circuit driven at 100V. A drive control section 105 that drives the motor 106 of the pump device is provided inside the primary circuit section 103.

On the other hand, the primary circuit section 103 is connected to a control section 104 as a secondary circuit section via a transformer. The control unit 104 is a circuit driven by 24V (or 12V), and is a circuit that controls various parts of the pump device.

The control unit 104 and the drive control unit 105 are capable of transmitting and receiving signals via a photocoupler. Specifically, signals of a target current value and target rotation speed are transmitted from the control unit 104 to the drive control unit 105, and feedback signals (actual motor current value and motor rotation speed) are transmitted from the drive control unit 105 to the control unit 104. It is meant to be transmitted.

An example of control of the pump device (motor) by the drive control unit 105 is shown in FIG. As shown in FIG. 10, an inrush current appears in the current value actually flowing in the motor, but this did not pose a particular problem in the conventional configuration.

Japanese Patent Application Publication No. 2019-163614 Japanese Patent Application Publication No. 2001-342989

In the circuit configuration shown in FIG. 9, the drive voltage of the control unit 104 is 24V (or 12V), while the drive voltage of the drive control unit 105 is 100V, so it is difficult to realize a compact design. Therefore, the inventor of the present invention has intensively studied the possibility of designing the drive voltage of the drive control unit that drives the motor of the pump device to also be 24V (or 12V).

If such a design is adopted, if an inrush current flows in the motor, it will exceed the output capacity to output a 24V (or 12V) drive voltage, and the overload protection function (when overcurrent is detected) will be activated. It was discovered that the safety device (latched) would activate and all functions of the product would stop (hereinafter referred to as a latch).

Therefore, in order to suppress the magnitude of the rush current, the inventors of the present invention have considered reducing (gentling) the slope of the increase in current value. However, it has been found that such a solution undesirably increases the time required to start up the pump device.

Furthermore, when determining the presence or absence of water in the wash water tank using the current value that actually flows in the pump device when the pump device starts driving, reducing the current value flowing through the pump to suppress the inrush current causes water to flow into the wash water tank. The difference in current value between the case where there is and the case where there is no becomes small. It has also been found that the determination accuracy is affected by variations in current caused by parts and motor characteristics, resulting in poor determination accuracy. (Note that it is explained in Patent Document 2, for example, that there is a correlation between the current value that actually flows in the motor of the pump device and the amount of water that passes through the pump device (supplied by the pump device). ing.)

The present invention was created based on the above background. An object of the present invention is to reduce the degree (magnitude) of rush current in a pump device that supplies cleaning water, to suppress the time required to start up the pump device, and to reduce the amount of water in a cleaning water tank. It is an object of the present invention to provide a flush toilet device capable of determining the presence or absence of a flush toilet with effective accuracy.

The present invention is a flush toilet device that is flushed with flush water, and includes a toilet body, a flush water tank that stores flush water, and a flush water tank that supplies flush water stored in the flush water tank to the toilet body. The drive control device includes a pump device, a drive control device that controls the drive of the pump device, and a current detection means that measures a current value that actually flows in the pump device, and the drive control device controls the pump device at a predetermined level. The pump is driven based on a first target current value for a short period of time, and then driven based on a second target current value that is larger than the first target current value, and the current detection means is configured to drive the pump based on a second target current value that is larger than the first target current value. The current value actually flowing in the pump device is measured while the device is driven based on the second target current value, and the drive control device is configured to measure the current value that actually flows in the pump device while the device is driven based on the second target current value. The flush toilet device is characterized in that the presence or absence of water in the flush water tank is determined based on the current value measured by the current detection means while being driven based on the current value. It is.

According to the present invention, by providing the step of driving the pump device based on a relatively small first target current value over a predetermined short time, the inrush current at the start of driving based on the first target current value is reduced. The degree of damage can be effectively reduced. On the other hand, since the time required for this step is set to a predetermined short time, it is possible to prevent the time required for starting the pump device from increasing. Furthermore, since the presence or absence of water in the wash water tank is determined based on the current value measured by the current detection means at the start of driving based on the relatively large second target current value, effective determination accuracy cannot be guaranteed. can. On the other hand, since the drive based on the second target current value can be performed immediately after a predetermined short period of time has elapsed, it is possible to prevent the time required for determining the presence or absence of water in the wash water tank from increasing.

If the pump device has a built-in motor, the predetermined short time period is equal to or slightly longer than the time period during which the motor is driven for one revolution (approximately 1 to 1.5 times). It is preferable.

According to this, since driving based on the second target current value is started after the motor is in a generally stable rotational state, the degree of inrush current at the time of starting driving based on the second target current value can be effectively reduced.

Alternatively, the current detection means measures the current value actually flowing in the pump device even while the pump device is driven based on the first target current value, and the drive control device measures the current value that actually flows in the pump device even while the pump device is driven based on the first target current value. While the pump device is driven based on the first target current value, the current detection means detects a decrease in the current value that actually flows in the pump device, and then the pump device detects a decrease in the current value that actually flows in the pump device, and then detects a decrease in the current value that actually flows in the pump device. may be driven.

According to this, the drive based on the second target current value is started after the influence of the rush current at the time of starting the drive based on the first target current value subsides, so the drive based on the second target current value is started. The degree of inrush current at the start can be effectively reduced.

For example, the second target current value corresponds to the target current value during rated operation. In this case, two levels of target current values will be used.

Further, the drive control device compares the current value measured by the current detection means while the pump device is driven based on the second target current value with the threshold value for determination, thereby determining whether Preferably, the presence or absence of water is determined.

According to this, since the determination method is simple, quick determination processing is easy.

In this case, the threshold value for determination is the actual value in the pump device that is measured by the current detection means while the pump device is actually driven based on the second target current value with no water in the wash water tank. Preferably, it is set in advance based on the value of the current flowing.

According to this, even if there are variations in the characteristics of individual pump devices, it is possible to set an appropriate threshold value for each pump device, and as a result, it is possible to more easily determine the presence or absence of water in the wash water tank. It can be determined with high accuracy.

Here, the current value that actually flows in the pump device while the pump device is being driven when there is no water in the wash water tank is considered to be mainly based on the sliding resistance of the mechanical seal inside the motor. . It is considered that the sliding resistance of the mechanical seal inside the motor decreases little by little each time the motor is driven (that is, each time a cleaning operation is performed). It is preferable that the determination threshold be updated taking this phenomenon into account. That is, it is preferable that the determination threshold value be updated in accordance with the number of cleaning operations performed in the flush toilet device. Alternatively, assuming that the elapsed time after the installation of the flush toilet device is roughly proportional to the number of flushing operations, the threshold for determination may be updated according to the elapsed time after the flush toilet device was installed. It is preferable that the It is also preferable to update the determination threshold every time a cleaning operation is performed.

The inventions described above are particularly effective when designing a drive control device so that it can be driven at a relatively low drive voltage for the purpose of downsizing the device. Specifically, it is particularly effective in reducing the output capacity of the power supply when driving the drive control device with the output voltage of the control circuit. Even in the case of such low voltage driving, by reducing the magnitude of the rush current, it is suppressed from exceeding the output capacity, and the occurrence of latching is avoided.

According to the present invention, by providing the step of driving the pump device based on a relatively small first target current value over a predetermined short time, the inrush current at the start of driving based on the first target current value is reduced. The degree of damage can be effectively reduced. On the other hand, since the time required for this step is set to a predetermined short time, it is possible to prevent the time required for starting the pump device from increasing. Furthermore, since the presence or absence of water in the wash water tank is determined based on the current value measured by the current detection means at the start of driving based on the relatively large second target current value, effective determination accuracy cannot be guaranteed. can. On the other hand, since the drive based on the second target current value can be performed immediately after a predetermined short period of time has elapsed, it is possible to prevent the time required for determining the presence or absence of water in the wash water tank from increasing.

1 is a schematic configuration diagram of a flush toilet device according to an embodiment of the present invention. FIG. 2 is a plan view of the wash water tank of FIG. 1; 3 is a sectional view taken along line III-III in FIG. 2. FIG. 2 is a schematic diagram of a circuit configuration including a drive control section of FIG. 1. FIG. It is an example of the time chart at the time of drive control of a pump device. It is a figure showing the operational flow of threshold value setting when installing the flush toilet device of this embodiment. FIG. 3 is a diagram showing a flow during a cleaning operation of the flush toilet device according to the present embodiment. It is a graph showing a phenomenon that is the basis for updating a threshold value. FIG. 2 is a schematic diagram of a circuit configuration including a conventional drive control section. This is an example of a time chart during drive control of a conventional pump device.

Next, a flush toilet device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

(composition)
FIG. 1 is a schematic configuration diagram of a flush toilet device 1 according to an embodiment of the present invention, FIG. 2 is a plan view of a flush water tank 20 in FIG. 1, and FIG. FIG.

As shown in FIG. 1, a flush toilet device 1 according to an embodiment of the present invention is a flush toilet device that is flushed with flush water, and includes a toilet body 2 and a flush water provided behind the toilet body 2. It is equipped with 20 tanks.

The toilet bowl body 2 is generally made of ceramic. The toilet main body 2 includes a bowl part 12 for receiving waste, a drain trap pipe 14 extending from the bottom of the bowl part 12, a jet spout 16 for discharging jet water, and a rim spout 18 for discharging rim water. ing.

The jet spout 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 so as to discharge cleaning water toward the drain trap line 14. ing.

The rim water spout 18 is formed at the rear of the upper left side of the bowl part 12, and is configured to discharge cleaning water along the upper edge of the bowl part 12.

The drain trap conduit 14 has an inlet part 14a, a trap rising pipe 14b rising from the inlet part 14a, and a trap descending pipe 14c descending from the trap rising pipe 14b. A top portion 14d is formed between the trap rising pipe 14b and the trap descending pipe 14c, and the drain pipe 8 is connected to the lower end of the trap descending pipe 14c of the drain trap conduit 14.

Further, the flush toilet device 1 of this embodiment includes a water supply device 4 directly connected to a water supply. The water supply device 4 has a water supply channel 24 through which washing water is supplied from the water supply. The water supply channel 24 is provided with a stop valve 26, a strainer 28, a branch fitting 30, a constant flow valve 32, a diaphragm type electromagnetic on-off valve 34, and a water supply channel switching valve 36 in this order from the upstream side.

On the downstream side of the water supply channel switching valve 36, there are a rim side water supply channel 38 for supplying wash water to the rim spout 18 and a tank side water supply channel 40 for supplying wash water to the wash water tank 20. It is connected.

The cleaning water that has passed through the electromagnetic on-off valve 34 is transferred from the rim-side water supply channel 38 on the rim side to the rim spout 18 via the water supply channel switching valve 36, and/or from the tank-side water supply channel 40 on the tank side. The water is supplied to the wash water tank 20.

In the flush toilet device 1 of this embodiment, water is supplied to the rim using the water pressure (direct pressure) of the tap water. On the other hand, regarding the jet water discharge, water is supplied while the wash water stored in the wash water tank 20 is pressurized by the pump device 22. That is, the flush toilet device 1 of this embodiment is a hybrid (direct water pressure type + tank water supply type) flush toilet device.

A rim water discharge vacuum breaker 48 is provided in the rim side water supply channel 38. Similarly, the tank side water supply channel 40 is also provided with a vacuum breaker 42 which is a check valve. A ball-type check valve 43 is provided at the connection between the tank-side water supply channel 40 and the wash water tank 20. A ball check valve 44 is also provided at the connection between the return pipe 50 and the wash water tank 20.

Further, the flush toilet device 1 of this embodiment uses the flush water stored in the flush water tank 20 (specifically, the flush water taken in from the water intake port 45a of the water pipe 45 in the flush water tank 20). It further includes a pump device 22 for supplying water to the toilet main body 2.

The pump device 22 of this embodiment is a pump device with a built-in motor. The flush toilet device 1 of the present embodiment further includes a drive control section 85 that can control the drive of the motor 86 of the pump device 22 and measure the current value of the motor 86 of the pump device 22 (drive control section 85 also serves as current detection means for measuring the current value actually flowing in the motor 86).

The lower part of the wash water tank 20 is attached to the rear upper part of the toilet main body 2. The flush water tank 20 is formed to have a relatively low height when attached to the toilet main body 2 (it is a low-silhouette tank). The tank capacity of the wash water tank 20 is set within the range of 1.0L to 6.0L.

The pump device 22 is connected to a water pipe 45 that enters from the side of the wash water tank 20 and extends to the bottom thereof. Further, the pump device 22 is connected to a jet-side water supply channel 46 that extends to the jet water outlet 16 . Thereby, the pump device 22 sucks the cleaning water stored in the cleaning water tank 20, pressurizes it, and supplies it to the jet spout 16. The water pipe 45 is not limited to passing through the inside of the wash water tank 20, and may be connected from the outside of the wash water tank 20 to the water intake port 45a provided at the lower part of the wash water tank 20.

An overflow channel 70 is provided between the wash water tank 20 and the jet side water supply channel 46. An upper end 70a of the overflow channel 70 opens into the wash water tank 20, and a lower end 70b thereof is connected to the jet side water supply channel 46. A flapper valve 72, which is a check valve, is attached to the overflow passage 70.

Next, FIG. 4 is a schematic diagram of a circuit configuration including the drive control section 85. As shown in FIG. 4, a primary circuit section 83 is connected to an AC commercial power source 81 via a rectifier section 82. The primary side circuit section 83 is a circuit driven at 100V.

The primary circuit section 83 is connected to the secondary circuit section 87 via a transformer. The secondary circuit section 87 is a circuit driven at 24V (or 12V). The drive control unit 85 that drives the motor 86 of the pump device 22 is, for example, an FET circuit, and is provided inside the secondary circuit unit 87. Further, a control section 84 that controls various parts of the pump device 22 is also provided inside the secondary circuit section 87.

The control section 84 and the drive control section 85 are capable of transmitting and receiving signals. Specifically, signals of target current value and target rotation speed are transmitted from the control section 84 to the drive control section 85, and feedback signals (actual motor current value and motor rotation speed) are transmitted from the drive control section 85 to the control section 84. It is meant to be transmitted.

When the drive control unit 85 of this embodiment receives the target current value during rated operation from the control unit 84, the drive control unit 85 sets the target current value as the second target current value, and assumes that the Duty at this time is 80 to 100%. , 25% of the current value is set as the first target current value, and the pump device 22 is first driven based on the first target current value for a predetermined short time, and then driven based on the second target current value. It is supposed to be done.

Further, in the present embodiment, the predetermined short time is either a time equal to the time during which the motor 86 of the pump device 22 is driven by one rotation, or a time slightly longer than the time (about 1 to 1.5 times). is set as .

Further, the drive control unit 85 of the present embodiment serves as a current detection means to measure the current value that actually flows in the pump device 22 while the pump device 22 is driven based on the second target current value. The presence or absence of water in the wash water tank 20 is determined based on the measured current value.

Specifically, the drive control unit 85 of the present embodiment compares the current value measured while the pump device 22 is driven based on the second target current value and the threshold value for determination. , the presence or absence of water in the wash water tank 20 is determined.

In this embodiment, the threshold value for determination (indicated by a dashed line in FIG. 5) is set when the pump device 22 is actually driven based on the second target current value with no water in the cleaning water tank 20. , is set in advance based on the value (indicated by the thick broken line in FIG. 5) measured as the current value actually flowing in the pump device 22.

On the other hand, the control unit 84 is electrically connected to the electromagnetic on-off valve 34, the water supply channel switching valve 36, etc., and can electrically control (operate) these by mutually transmitting and receiving electrical signals. There is. For example, the control unit 84 has a function of controlling the opening/closing operation of the electromagnetic on-off valve 34, the switching operation of the water supply channel switching valve 36, and the like.

(Threshold setting)
In the flush toilet device 1 of this embodiment, a threshold value for determining the presence or absence of water in the flush water tank 20 is set at the time of installation (during construction).

FIG. 6 is a diagram showing an operation flow for setting a threshold value when installing the flush toilet device 1 of this embodiment.

When the threshold value setting program is started (STEP01), water supply to the wash water tank 20 is started, and the wash water tank 20 is filled with water (STEP02).

Subsequently, the toilet bowl cleaning operation is automatically performed, that is, the pump device 22 is automatically driven, and a predetermined amount of flushing water is supplied to the toilet bowl main body 2 (STEP 03). At this time, the drive control unit 85 automatically drives the pump device 22 for a predetermined short time based on the first target current value, and then automatically drives the pump device 22 based on the second target current value. Then, the drive control unit 85, as a current detection means, measures the current value that actually flows in the pump device 22 while the pump device 22 is driven based on the second target current value (STEP04).

Subsequently, a toilet bowl flushing operation is performed to empty the flush water tank 20. In such a state without water, the drive control unit 85 further automatically drives the pump device 22 for a predetermined short time based on the first target current value, and then automatically drives the pump device 22 based on the second target current value. Automatically driven. Then, the drive control unit 85, as a current detection means, measures the current value that actually flows in the pump device 22 while the pump device 22 is driven based on the second target current value (STEP05).

The drive control unit 85 feeds back the current value when there is water (detected value by STEP 04) and the current value when there is no water (detected value by STEP 05) to the control unit 84, and the control unit 84 Based on the current value when there is no water, for example, an intermediate value thereof is set as the threshold value.

(effect)
Next, the operation of the flush toilet device 1 of this embodiment having the above configuration will be explained.

FIG. 7 is a diagram showing the flow of the flushing operation of the flush toilet device 1 of this embodiment. As shown in FIG. 3, in the standby state, the water level in the wash water tank 20 is at the water stop level WL0 (standby water level). During the cleaning operation of the toilet main body 2, the drive control section 85 starts driving the motor 86 of the pump device 22 in response to a control command from the control section 84 (STEP 11).

Specifically, the drive control unit 85 receives a target current value during rated operation (corresponding to the rotational speed of the motor 86 of 4000 rpm) from the control unit 84, sets the target current value as a second target current value, and sets the target current value to the second target current value. % as the first target current value (corresponding to the rotational speed of the motor 86 of 1000 rpm), and the pump device 22 is first driven for a predetermined short time based on the first target current value (the first target current (supplying a driving voltage corresponding to the second target current value), and then driving based on the second target current value (providing a driving voltage corresponding to the second target current value).

A time chart at this time is shown in FIG. As shown in FIG. 5, by providing a step of driving the pump device 22 based on a relatively small first target current value over a predetermined short period of time, the pump device 22 is driven at the start of driving based on the first target current value. The degree of current can be effectively reduced. On the other hand, since the time required for this step is set to a predetermined short time, it is possible to prevent the time required for starting the pump device 22 from increasing.

Further, the predetermined short time is equal to or slightly longer than the time during which the motor 86 is driven one rotation. As a result, driving based on the second target current value is started after the motor 86 is in a generally stable rotation state, so that the degree of inrush current at the time of starting driving based on the second target current value can be effectively reduced. (In the example of FIG. 5, overshoot is not visible). Further, the time required to start up the pump device 22 is also suppressed from increasing.

On the other hand, the drive control unit 85 measures the current value that actually flows in the pump device 22 while the pump device 22 is driven based on the second target current value, and controls the cleaning water tank based on the measured current value. The presence or absence of water in 20 is determined. (According to the inventor of the present invention, the measured value of the current value can be determined (obtained) within several tens of milliseconds to several hundred milliseconds after the start of driving based on the second target current value.)

Specifically, the drive control unit 85 uses a current value measured while the pump device 22 is driven based on the second target current value, a threshold value for determination (shown by a dashed line in FIG. 5), By comparing the values, it is determined whether there is water in the wash water tank 20 (STEP 12).

If it is determined that there is water in the flush water tank 20, the motor 86 of the pump device 22 continues to be driven so that a predetermined amount of flush water is supplied to the toilet main body 2. The pump device 22 sucks the wash water stored in the wash water tank 20 and supplies it to the toilet main body 2, as shown by an arrow F0 in FIG. Then, as will be described later, the threshold value is updated if necessary (STEP 13), and the toilet bowl cleaning operation is completed (STEP 14).

If it is determined that there is no water in the wash water tank 20, the drive of the motor 86 is immediately stopped in order to prevent the mechanical seal of the motor 86 from deteriorating (STEP 15). If it is determined that there is no water in the wash water tank 20 N times (for example, if it continues 3 times), the toilet flush operation (acceptance) is prohibited (STEP 16), and an alarm is notified to that effect as an abnormality (STEP 17).

(Threshold update)
It is believed that the current value that actually flows in the pump device 22 while the pump device 22 is being driven when there is no water in the wash water tank 20 is mainly based on the sliding resistance of the mechanical seal inside the motor 86. It will be done. It is considered that the sliding resistance of the mechanical seal inside the motor 86 decreases little by little each time the motor 86 is driven (that is, each time a cleaning operation is performed).

It is preferable that the determination threshold be updated taking this phenomenon into consideration. That is, it is preferable that the determination threshold value be updated in accordance with the number of cleaning operations performed in the flush toilet device 1.

In this embodiment, on the assumption that the elapsed time after the installation of the flush toilet device 1 is approximately proportional to the number of flushing operations, the threshold value for determination is set according to the elapsed time after the flush toilet device 1 is installed. It is supposed to be updated.

Specifically, taking into account the relationship (phenomenon) shown in FIG. 8, the threshold value is automatically updated (reduced) according to the elapsed time after the flush toilet device 1 is installed. ing.

(effect)
As described above, according to the flush toilet device 1 of the present embodiment, by providing the step of driving the pump device 22 based on the relatively small first target current value over a predetermined short period of time, the first The degree of rush current at the start of driving based on the target current value can be effectively reduced. On the other hand, since the time required for this step is set to a predetermined short time, it is possible to prevent the time required for starting the pump device 22 from increasing.

Furthermore, since the predetermined short time is equal to or slightly longer than the time during which the motor 86 is driven by one revolution, it is possible to avoid the time required for starting the pump device 22 becoming longer. It is possible to effectively reduce the degree of inrush current at the start of driving based on the second target current value while suppressing the current value (overshoot cannot be visually recognized in the example of FIG. 5).

Further, according to the flush toilet device 1 of the present embodiment, the presence or absence of water in the flush water tank 20 is determined based on the current value measured at the start of driving based on the relatively large second target current value. , effective judgment accuracy can be guaranteed. On the other hand, since the drive based on the second target current value can be performed immediately after a predetermined short time has elapsed, it is possible to prevent the time required for determining the presence or absence of water in the wash water tank 20 from increasing.

Further, according to the flush toilet device 1 of the present embodiment, the drive control unit 85 uses the current value measured while the pump device 22 is driven based on the second target current value and the threshold value for determination. Since the presence or absence of water in the wash water tank 20 is determined by comparing , the determination method is simple and quick determination processing is facilitated.

Further, according to the flush toilet device 1 of the present embodiment, the threshold value for determination is set while the pump device 22 is actually driven based on the second target current value in a state where there is no water in the flush water tank 20. It is set in advance based on the current value that actually flowed in the pump device 22, which was measured. As a result, even if there are variations in characteristics among individual pump devices 22, an appropriate threshold value can be set for each target pump device 22, and as a result, the presence or absence of water in the wash water tank 20 can be determined. Judgment can be made with higher accuracy.

Further, according to the flush toilet device 1 of the present embodiment, the threshold value for determination is updated according to the elapsed time after the flush toilet device 1 is installed. Changes in the sliding resistance of the mechanical seal over time are taken into account, and effective accuracy in determining the presence or absence of water in the wash water tank 20 can be guaranteed over a long period of time.

Furthermore, although the drive control unit 85 of this embodiment is designed to be driven at a relatively low voltage of 24V, by reducing the magnitude of the rush current, exceeding the output capacity is suppressed. Therefore, the occurrence of latching in the secondary circuit section 87 is effectively avoided.

In this embodiment, the predetermined short time is set to be equal to or slightly longer than the time during which the motor 86 is driven for one revolution, but this can be easily determined by using a timer. can be managed.

Alternatively, the predetermined short time period may be managed based on rotation speed information fed back from the motor 86 of the pump device 22 (information on the number of pulses depending on the rotation of the motor 86: for example, 12 pulses per rotation).

(Modified example)
The drive control unit 85 measures the current value that actually flows in the motor 86 of the pump device 22 while the motor 86 of the pump device 22 is driven based on the first target current value, and detects a decrease in the current value (for example, the actual current value). (i.e., the time until such detection is made is a predetermined short time), a second target current value that is larger than the first target current value is detected. The motor 86 of the pump device 22 may be driven based on this.

According to this, the drive based on the second target current value is started after the influence of the rush current at the time of starting the drive based on the first target current value subsides, so the drive based on the second target current value is started. The degree of inrush current at the start can be effectively reduced.

1 Flush toilet device 2 Toilet main body 4 Water supply device 8 Drain pipe 12 Bowl part 14 Drain trap pipe 14a Inlet part 14b Trap rising pipe 14c Trap descending pipe 14d Top part 16 Jet spout 18 Rim spout 20 Wash water tank 22 Pump device 24 Water supply channel 26 Water stop valve 28 Strainer 30 Branch fitting 32 Constant flow valve 34 Electromagnetic on-off valve 36 Water supply channel switching valve 38 Rim side water supply channel 40 Tank side water supply channel 42 Vacuum breaker 43 Ball type check valve 44 Ball type check valve 45 Water pipe 45a Water intake portion 46 Jet side water supply channel 48 Vacuum breaker for rim water discharge 50 Return pipe 70 Overflow channel 70a Upper end 70b Lower end 72 Flapper valve 81 AC commercial power supply 82 Rectifier section 83 Primary side circuit section 84 Control section 85 Drive control section 86 Motor 87 Secondary circuit section 101 AC commercial power supply 102 Rectifier section 103 Primary circuit section 104 Control section 105 Drive control section 106 Motor F0 Arrow WL0 Water stop level

Claims (7)

A flush toilet device that is flushed with flush water,
The toilet bowl body,
A wash water tank that stores wash water;
a pump device that supplies the wash water stored in the wash water tank to the toilet main body;
a drive control device that controls the drive of the pump device;
current detection means for measuring the value of the current actually flowing in the pump device;
Equipped with
The drive control device is configured to drive the pump device based on a first target current value for a predetermined short period of time, and then drive the pump device based on a second target current value that is larger than the first target current value. has become,
The current detection means is configured to measure a current value that actually flows in the pump device while the pump device is driven based on the second target current value,
The drive control device compares the current value measured by the current detection means while the pump device is driven based on the second target current value with a threshold value for determination. It is designed to determine the presence or absence of water in the wash water tank.
The threshold value for determination is updated according to the number of cleaning operations performed in the flush toilet device.
A flush toilet device characterized by: A flush toilet device that is flushed with flush water,
The toilet bowl body,
A wash water tank that stores wash water;
a pump device that supplies the wash water stored in the wash water tank to the toilet main body;
a drive control device that controls the drive of the pump device;
current detection means for measuring the value of the current actually flowing in the pump device;
Equipped with
The drive control device is configured to drive the pump device based on a first target current value for a predetermined short period of time, and then drive the pump device based on a second target current value that is larger than the first target current value. has become,
The current detection means is configured to measure a current value that actually flows in the pump device while the pump device is driven based on the second target current value,
The drive control device compares the current value measured by the current detection means while the pump device is driven based on the second target current value with a threshold value for determination. It is designed to determine the presence or absence of water in the wash water tank.
The threshold value for determination is updated according to the elapsed time after the installation of the flush toilet device.
A flush toilet device characterized by: The pump device has a built-in motor,
3. The flush toilet device according to claim 1 , wherein the predetermined short time is equal to or slightly longer than the time during which the motor is driven one revolution. The current detection means is configured to measure a current value that actually flows in the pump device even while the pump device is driven based on the first target current value,
The drive control device detects a decrease in the current value actually flowing in the pump device while the pump device is driven based on the first target current value, and then adjusts the current value to the first target current value. The flush toilet device according to claim 1 or 2, wherein the pump device is driven based on a second target current value that is larger than the current value. The flush toilet device according to any one of claims 1 to 4 , wherein the second target current value corresponds to a target current value during rated operation. The threshold value for determination is determined in the pump device measured by the current detection means while the pump device is actually driven based on the second target current value in a state where there is no water in the wash water tank. The flush toilet device according to any one of claims 1 to 5, wherein the values are set in advance based on the value of the current that actually flows. The flush toilet device according to any one of claims 1 to 6 , wherein the drive control device is a device driven at a low voltage of 24V or less.

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