JP2021134603A - Water toilet bowl device - Google Patents

Abstract

To provide a water toilet bowl device in which the inrush current intensity of a pump device for supplying washing water can be decreased and the time required for starting the pump device can be prevented from being extended.SOLUTION: The present invention is a water toilet bowl device that is washed with washing water. The water toilet bowl device has a toilet bowl body, a washing water tank to store the washing water, a pump device for supplying the washing water stored in the washing water tank to the toilet bowl body, and a drive control device for controlling the driving of the pump device. The drive control device drives the pump device based on a first target current value for a predetermined short time, and subsequently drives the pump device based on a second target current value larger than the first target current value.SELECTED DRAWING: Figure 5

Description

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

Conventionally, it is a flush toilet device that is washed with wash water, and is a toilet body, a wash water tank that stores wash water, and a pump device that supplies wash water stored in the wash water tank to the toilet body. , A control device for controlling the pump device, and a flush urinal device provided with the above are widely known.

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

Conventionally, such a pump device is driven by using the voltage of the commercial power supply (100 V), and the drive control unit for driving the pump device is provided in the primary circuit unit operated by the voltage of the commercial power supply. There is.

An example of the configuration of the conventional control circuit is shown in FIG. In the circuit shown in FIG. 7, the primary circuit unit 103 is connected to the AC commercial power supply 101 via the rectifying unit 102. The primary side circuit unit 103 is a circuit driven by 100V. The drive control unit 105 that drives the motor 106 of the pump device is provided inside the primary circuit unit 103.

On the other hand, the primary side circuit unit 103 is connected to the control unit 104 as the secondary side circuit unit 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 can transmit and receive signals via a photocoupler. Specifically, a signal of a target current value and a target rotation speed is transmitted from the control unit 104 to the drive control unit 105, and a feedback signal (actual motor current value and motor rotation speed) is transmitted from the drive control unit 105 to the control unit 104. It is supposed 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. 8, an inrush current appears in the current value actually flowing in the motor, but this has not been a particular problem in the conventional configuration.

JP-A-2019-163614

In the circuit configuration shown in FIG. 7, the drive voltage of the control unit 104 is 24 V (or 12 V), while the drive voltage of the drive control unit 105 is 100 V, so that it is difficult to realize a compact design. Therefore, the present inventor has been diligently studying the possibility of designing the drive voltage of the drive control unit that drives the motor of the pump device to be 24 V (or 12 V).

Then, when such a design is adopted, when an inrush current flows in the motor, the output capacity of the power supply circuit that outputs a drive voltage of 24V (or 12V) is exceeded, and the overload protection function (excessive load protection function) It was found that the safety device (safety device that works when detecting current) is activated and all the functions of the product are stopped (hereinafter referred to as latch).

Therefore, the present inventor has studied to reduce (gentle) the slope of the increase in the current value in order to suppress the magnitude of the inrush current. However, it has been found that with such a solution, the time required to start the pumping device becomes undesirably long.

The present invention was devised based on the above background. An object of the present invention is to provide a flush urinal device capable of reducing the degree (magnitude) of an inrush current in a pump device for supplying wash water and suppressing a long time required for starting the pump device. That is.

The present invention is a flush toilet device that is washed with wash water, and supplies a toilet body, a wash water tank for storing wash water, and wash water stored in the wash water tank to the toilet body. A pump device and a drive control device for controlling the drive of the pump device are provided, and the drive control device drives the pump device for a predetermined short time based on a first target current value, and then , A flush urinal device characterized in that it is driven based on a second target current value larger than the first target current value.

According to the present invention, by providing a 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 set. The degree can be effectively reduced. On the other hand, since the time required for the step is set to a predetermined short time, it is possible to suppress the time required for starting the pump device from becoming long.

When a motor is built in the pump device, the predetermined short time is equal to or slightly longer than the time for driving the motor for one rotation (about 1 to 1.5 times). Is preferable.

According to this, the drive based on the second target current value is started after the motor is in a substantially stable rotation state. Therefore, the degree of the inrush current at the start of drive based on the second target current value. Can be effectively reduced.

Alternatively, a current detecting means for measuring the current value actually flowing in the pump device while the pump device is driven based on the first target current value may be further provided. In this case, the drive control device drives the pump device based on a second target current value larger than the first target current value after the current detecting means detects a decrease in the current value actually flowing in the pump device. Is preferable.

According to this, the drive based on the second target current value is started after the influence of the inrush current at the start of the drive based on the first target current value has subsided. Therefore, 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, a two-step target current value is used.

However, a target current value of three or more steps may be used. For example, when a three-step target current value is used, the drive control device drives the pump device based on the first target current value for a predetermined short time, and then a second larger than the first target current value. It is driven based on the target current value, and then driven based on the third target current value larger than the second target current value, and the third target current value corresponds to the target current value at the time of rated operation.

The above inventions are particularly effective when the drive control device is designed so that it can be driven with 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 the drive control device is driven by the output voltage of the control circuit. Even in the case of such a low voltage drive, the magnitude of the inrush current is reduced, so that the output capacitance is suppressed and the occurrence of latch is avoided.

According to the present invention, by providing a 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 set. The degree can be effectively reduced. On the other hand, since the time required for the step is set to a predetermined short time, it is possible to suppress the time required for starting the pump device from becoming long.

It is a structural schematic diagram of the flush toilet bowl device by one Embodiment of this invention. It is a top view of the washing water tank of FIG. FIG. 2 is a cross-sectional view taken along the line III-III of FIG. It is the schematic of the circuit structure including the drive control part of FIG. This is an example of a time chart during drive control of a pump device. This is another example of a time chart during drive control of a pump device. It is the schematic of the circuit structure including the conventional drive control part. This is an example of a time chart at the time of drive control of a conventional pump device.

Next, a flush toilet bowl 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 the wash water tank 20 of FIG. 1, and FIG. 3 is III-III of FIG. It is a line sectional view.

As shown in FIG. 1, the flush toilet device 1 according to the embodiment of the present invention is a flush toilet device that is washed with wash water, and is a flush toilet body 2 and wash water arranged behind the toilet body 2. It is equipped with a tank 20.

The toilet bowl body 2 is generally made of pottery. The toilet body 2 has a bowl portion 12 for receiving filth, a drain trap pipeline 14 extending from the bottom of the bowl portion 12, a jet spout 16 for jet spouting, and a rim spout 18 for rim spouting. ing.

The jet spout 16 is formed at the bottom of the bowl portion 12, is arranged substantially horizontally toward the inlet of the drain trap pipe 14, and discharges the washing water toward the drain trap pipe 14. ing.

The rim spout 18 is formed behind the upper left side of the bowl portion 12, and discharges washing water along the upper edge of the bowl portion 12.

The drain trap pipeline 14 has an inlet portion 14a, a trap riser pipe 14b rising from the inlet portion 14a, and a trap lowering pipe 14c descending from the trap riser pipe 14b. The top 14d is between the trap riser pipe 14b and the trap lowering pipe 14c, and the drainage pipe 8 is connected to the lower end of the trap lowering pipe 14c of the drainage trap pipe line 14.

Further, the flush toilet device 1 of the present embodiment includes a water supply device 4 directly connected to the water supply. The water supply device 4 has a water supply channel 24 to which washing water is supplied from the tap water. The water supply channel 24 is provided with a water 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 water discharge port 18 and a tank side water supply channel 40 for supplying wash water to the wash water tank 20. It is connected.

The wash water that has passed through the electromagnetic on-off valve 34 passes from the rim side water supply channel 38 on the rim side to the rim water discharge port 18 and / or from the tank side water supply channel 40 on the tank side via the water supply channel switching valve 36. It is supplied to the washing water tank 20.

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

A vacuum breaker 48 for discharging rim water 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 portion between the tank-side water supply channel 40 and the washing water tank 20. A ball-type check valve 44 is also provided at the connection portion between the return pipe line 50 and the washing water tank 20.

Further, the flush toilet device 1 of the present embodiment receives the wash water stored in the wash water tank 20 (specifically, the wash water taken in from the intake portion 45a of the water flow pipe 45 in the wash water tank 20). Further, a pump device 22 for supplying to the toilet bowl main body 2 and a float switch 52 provided in the washing water tank 20 are further provided.

The pump device 22 of the present embodiment is a pump device with a built-in motor. The flush urinal device 1 of the present embodiment further includes a drive control unit 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 unit). The 85 also serves as a current detecting means for measuring the current value actually flowing in the motor 86). It is also preferable to calculate the current value from the rotation speed of the pump device 22.

The lower portion of the wash water tank 20 is attached to the rear upper portion of the toilet bowl main body 2. The wash water tank 20 is formed to have a relatively low height (a low silhouette tank) in a state of being attached to the toilet bowl main body 2. The tank capacity of the wash water tank 20 is set in the range of 1.0 L to 6.0 L.

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 lower portion thereof. Further, the pump device 22 is connected to a jet-side water supply channel 46 extending to the jet spout 16. As a result, the pump device 22 sucks the washing water stored in the washing 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 washing water tank 20, and may be connected from the outside of the washing water tank 20 to the water intake portion 45a provided in the lower part of the washing water tank 20.

An overflow flow path 70 is provided between the wash water tank 20 and the jet-side water supply channel 46. The upper end 70a of the overflow flow path 70 is open in the washing water tank 20, and the lower end 70b is connected to the jet side water supply channel 46. A flapper valve 72, which is a check valve, is attached to the overflow flow path 70.

When the water level in the washing water tank 20 reaches the specified water level, the float switch 52 transmits a detection signal indicating that fact. The float switch 52 can measure the water level in the washing water tank 20 relatively easily and accurately. The float switch 52 of the present embodiment has a first float switch 60 and a second float switch 62.

As shown in FIG. 3, the first float switch 60 receives a stem (shaft portion) 64 forming a rod-shaped shaft portion and a buoyancy corresponding to the water level according to the fluctuation of the water level in the washing water tank 20. It is composed of a first float portion 60a that moves up and down along the stem 64. The stem 64 extends downward in the vertical direction so as to hang down from a mounting portion mounted on the upper part of the washing water tank 20. The stem 64 includes a first reed switch (not shown) corresponding to the first float portion 60a. The first reed switch is electrically connected to the drive control unit 85.

When the first float portion 60a moves up and down according to the water level, the first reed switch changes between an ON state (ON state) and an OFF state (OFF state) according to the position of the first float portion 60a. The first float switch 60 is in the ON state when the water level in the wash water tank 20 is the still water level WL0 (standby water level), and is in the OFF state when the first specified water level WL1 is reached.

The second float switch 62 moves up and down along the stem (shaft) 64 and the second float portion 62a while receiving buoyancy according to the water level in response to fluctuations in the water level in the washing water tank 20. It consists of. The stem 64 includes a second reed switch (not shown) corresponding to the second float portion 62a. The second reed switch is also electrically connected to the drive control unit 85.

When the second float portion 62a moves up and down according to the water level, the second reed switch changes between an ON state (ON state) and an OFF state (OFF state) according to the position of the second float portion 62a. The second float switch 62 is in the OFF state when the water level in the wash water tank 20 is the still water level WL0 (standby water level), and is in the ON state when the first specified water level WL1 is reached.

Next, FIG. 4 is a schematic diagram of a circuit configuration including the drive control unit 85. As shown in FIG. 4, the primary circuit unit 83 is connected to the AC commercial power supply 81 via the rectifying unit 82. The primary side circuit unit 83 is a circuit driven by 100V.

The primary side circuit unit 83 is connected to the secondary side circuit unit 87 via a transformer. The secondary circuit unit 87 is a circuit driven by 24V. 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 unit 84 for controlling various parts of the pump device 22 is also provided inside the secondary circuit unit 87.

The control unit 84 and the drive control unit 85 can transmit and receive signals. Specifically, a signal of a target current value and a target rotation speed is transmitted from the control unit 84 to the drive control unit 85, and a feedback signal (actual motor current value and motor rotation speed) is transmitted from the drive control unit 85 to the control unit 84. It is supposed to be transmitted.

When the drive control unit 85 of the present embodiment receives the target current value during rated operation from the control unit 84, the target current value is set as the second target current value, and the drive duty at this time is considered to be 80% to 100%. In this case, the current value of 25% 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 based on the second target current value. It is designed to be driven.

Further, in the present embodiment, the predetermined short time is 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.

The control unit 84 is electrically connected to an electromagnetic on-off valve 34, a water supply channel switching valve 36, a float switch 52, etc., and can transmit and receive electrical signals to and from each other so that these can be electrically controlled (operated). It has become. For example, the control unit 84 has a function of controlling an opening / closing operation of the electromagnetic on-off valve 34, a switching operation of the water supply channel switching valve 36, and the like.

(Action)
Next, the operation of the flush toilet device 1 of the present embodiment having the above configuration will be described.

As shown in FIG. 3, in the standby state, the water level in the washing water tank 20 is the still water level WL0 (standby water level). During the cleaning operation of the toilet bowl body 2, the drive control unit 85 starts driving the motor 86 of the pump device 22 in response to a control command from the control unit 84.

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

The 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 for a predetermined short time, an inrush at the start of driving based on the first target current value is provided. The degree of current can be effectively reduced. On the other hand, since the time required for the step is set to a predetermined short time, it is possible to suppress the time required for starting the pump device 22 to become long.

Further, the predetermined short time is equal to or slightly longer than the time during which the motor 86 is driven for only one rotation. As a result, the drive based on the second target current value is started after the motor 86 is in a substantially stable rotation state, so that the degree of inrush current at the start of drive based on the second target current value can be effectively adjusted. It can be reduced (the overshoot is not visible in the example of FIG. 5). Further, it is suppressed that the time required for starting the pump device 22 becomes long.

Under the control of the drive control unit 85 as described above, the pump device 22 sucks the washing water stored in the washing water tank 20 and supplies it to the toilet bowl main body 2 as shown by the arrow F0 in FIG.

(effect)
As described above, according to the flush toilet device 1 of the present embodiment, the first step is to provide the pump device 22 based on a relatively small first target current value for a predetermined short time. The degree of inrush 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 the step is set to a predetermined short time, it is possible to suppress the time required for starting the pump device 22 to become long.

Further, since the predetermined short time is equal to or slightly longer than the time for driving the motor 86 by one rotation, the time required for starting the pump device 22 becomes long. While suppressing it, the degree of inrush current at the start of driving based on the second target current value can be effectively reduced (in the example of FIG. 5, the overshoot cannot be visually recognized).

Further, although the drive control unit 85 of the present embodiment is designed to be driven by a relatively low voltage of 24 V, the reduction of the magnitude of the inrush current suppresses the output capacity from being exceeded. Therefore, the occurrence of latch in the secondary circuit unit 87 is effectively avoided.

In the present embodiment, the predetermined short time is equal to or slightly longer than the time during which the motor 86 is driven by one rotation, but this can be easily achieved by using a timer. Can be managed by.

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

(First modification)
The drive control unit 85 measures the current value actually flowing 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 reduces the current value (for example, actually). After detecting (that is, the time until such detection is made is a predetermined short time) after detecting (a decrease of about half of the current flowing through the current), the second target current value larger than the first target current value is used. The motor 86 of the pump device 22 may be driven based on the above.

According to this, the drive based on the second target current value is started after the influence of the inrush current at the start of the drive based on the first target current value has subsided. Therefore, the drive based on the second target current value is started. The degree of inrush current at the start can be effectively reduced.

(Second modification)
In the above embodiment, the target current value of two steps is used, but the target current value of three steps or more may be used.

For example, when a three-stage target current value is used, the drive control unit 85 drives the pump device 22 based on the first target current value (corresponding to the rotation speed of the motor 86 of 300 rpm) for a predetermined short time. After that, it is driven based on the second target current value (corresponding to the rotation speed of the motor 86 of 1000 rpm) larger than the first target current value, and then the third target current value (of the motor 86) larger than the second target current value. It is driven based on (corresponding to 4000 rpm). The third target current value corresponds to the target current value during rated operation.

An example of such a time chart is shown in FIG. In the example of FIG. 6, when the drive control unit 85 receives the target current value during rated operation from the control unit 84, the target current value is set as the third target current value, and the current value of 7.5% and the current value of 25% thereof. The current values are set to the first target current value and the second target current value, respectively, and the pump device 22 is first driven for a predetermined short time (specifically, about 100 ms) based on the first target current value (specifically, about 100 ms). It supplies a drive voltage corresponding to the first target current value), and then drives based on the second target current value for a predetermined short time (specifically, about 200 ms) (corresponds to the second target current value). (Provides a drive voltage to be driven), and then drives based on a third target current value (provides a drive voltage corresponding to the third target current value).

1 Washing toilet device 2 Toilet bowl body 4 Water supply device 6 Washing water tank 8 Drain pipe 12 Bowl part 14 Drain trap pipe line 14a Inlet part 14b Trap rising pipe 14c Trap descending pipe 14d Top 16 Jet spout 18 Rim spout 20 Washing water Tank 22 Pumping device 24 Water supply channel 26 Water stopcock 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 flow pipe 45a Water intake 46 Jet side water supply channel 48 Rim water discharge vacuum breaker 50 Return pipe line 52 Float switch 60 1st float switch 60a 1st float switch 62 2nd float switch 62a 2nd float section 64 Stem 70 Overflow flow path 70a Upper end 70b Lower end 72 Flapper valve 81 AC commercial power supply 82 Rectifying unit 83 Primary side circuit unit 84 Control unit 85 Drive control unit 86 Motor 87 Secondary side circuit unit 101 AC commercial power supply 102 Rectifying unit 103 Primary Side circuit unit 104 Control unit 105 Drive control unit 106 Motor F0 Arrow WL0 Stop water level WL1 First specified water level

Claims (6)

A flush toilet device that is washed with wash water.
Toilet bowl body and
A wash water tank that stores wash water and
A pump device that supplies the wash water stored in the wash water tank to the toilet bowl body,
A drive control device that controls the drive of the pump device, and
With
The drive control device drives the pump device based on a first target current value for a predetermined short time, and then drives the pump device based on a second target current value larger than the first target current value. A water-washing urinal device characterized by. The pump device has a built-in motor.
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 by one rotation. Further provided is a current detecting means for measuring the current value actually flowing in the pump device while the pump device is driven based on the first target current value.
The drive control device drives the pump device based on a second target current value larger than the first target current value after the current detecting means detects a decrease in the current value actually flowing in the pump device. The water-washing urinal device according to claim 1, wherein the device is characterized by the above. The flush toilet device according to any one of claims 1 to 3, wherein the second target current value corresponds to a target current value during rated operation. The drive control device drives the pump device based on the first target current value for a predetermined short time, and then drives the pump device based on a second target current value larger than the first target current value. After that, it is driven based on a third target current value larger than the second target current value.
The flush toilet device according to any one of claims 1 to 3, wherein the third target current value corresponds to a target current value during rated operation. The flush toilet device according to any one of claims 1 to 5, wherein the drive control device is a device driven at a low voltage of 24 V or less.

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