JP2985664B2 - Control circuit of motor for driving water drainage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control circuit for a motor for driving a water drainage of a flush toilet used in an unspecified number of places especially in a cold region.

[0002]

2. Description of the Related Art Conventionally, in a cold area, particularly an unspecified number of flush toilets used, a water drainage plug buried in the ground driven by a motor has been adopted. This is the water inlet
An outlet and a drain are provided, and the outlet and the
The open state that shuts off the water port, the outlet and the inlet shut off
When the plug is closed, both the drain port is shut off and the plug is closed
And a drain having a drain state in which the drain port communicates with the outlet.
It is a thing using a stopper, and the water drainage stopper in the closed state drains the motor by turning on the operation switch from the outside,
The spindle, which is screwed to the rotating body that is reduced by the gears and meshes with the final gear, is converted to linear motion, and the piston connected to the spindle is moved to close the stopper.
As water flows from the inlet to the outlet through the water state
When water flows from the outlet to the toilet above the ground through the pipes after that, the power supply to the motor is shut off by the limit switch, and after a certain time elapses by the timer, the motor turns over and the piston is closed. stop and water moving in the direction to cut off the power supply to the motor further comprising a drainage state by plugging moved by the limit switch, discharge of water in the pipe leading to ground toilet drain tap <br/> or later To prevent freezing.

[0003] Therefore, there is an advantage that the operation is assured and it can be used safely even when the water is frozen, but on the other hand, the water in the pipe is drained even when the water is not frozen, which is uneconomical. This is especially true if the piping is long when water is discharged, but it has the drawback that it takes a long time before water is discharged. Until the water started to flow, some users felt anxious or misidentified that the toilet was out of order.

[0004]

SUMMARY OF THE INVENTION According to the present invention, the closing position for shutting off the outlet and the inlet of the water drain valve is appropriately selected by an operation switch from the outside, and water is supplied during the season when the water may freeze. stopped to stop the motor to move to the drainage state of discharging the draining Sen以descending water in the piping of, the season unlikely to cause freezing of the water to stop the motor in a water stop state not drained simply stopping the water Accordingly, it is an object of the present invention to provide a control circuit for a motor for driving a water drainage plug, in which water is discharged immediately when water is used next time when there is no risk of freezing of water.

[0005]

SUMMARY OF THE INVENTION The present invention provides an inlet and an outlet.
The open state where the mouth is conducting, and the inlet and outlet are shut off.
The water stop condition that the drain port is blocked by the closed
Having a drain state in which a drain port and an outlet port are in communication with each other
One of the motors for opening and closing the tap is connected to one of the DC power supplies whose polarity is changed by an external operation, and the other motor is connected to a first limiter for detecting the open state of the tap.
A second limit switch for detecting the water stoppage state of the water tap and a third limit switch for detecting the drainage state of the water tap, while being connected to the other of the DC power supply via the switch and the first diode in the forward direction. The drain switch is closed by connecting to the other of the DC power supply via a second diode in the opposite direction to the switch which is switched by an external operation, and switching between the second limit switch and the third limit switch by the external operation. The position can be selected, and when the second limit switch is selected, the second
Limit switch is the way to stop the motor switched, if you chose a third limit switch of the second Li
Even if the mitt switch is switched, the drain valve will be driven further,
When the third limit switch is switched , the circuit is cut off to stop the motor.

[0006]

[Function] In the season when water may freeze, water is stopped and then moved further to discharge the water in the pipe after draining the water. By stopping the water only during the season and not draining the water, the stop position is set to the closed position.
Also, the next user does not have to worry about the time when the water comes out.

[0007]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, in which two contacts r of a power supply relay R, a first limit switch L1, a second limit switch L2, and a third limit switch L3. When the changeover switch S operated from the outside and in the position shown in FIG.
, No drive current flows, and the water tap V is stopped in a closed water stop state. The limit switches L1, L2, and L3 for detecting the state of the drain valve V having a piston moved by the rotating motor M have hinge levers, and rotate with the drain valve V driven by the rotation of the motor M while being in contact with the hinge lever. With a disk-shaped detector having a convex part with a width, the limit switch is in the normally closed contact when the convex part of the detector is away from the hinge lever, and when the convex part presses the hinge lever, the limit switch is Is in a normally open contact. In the position shown in the figure, the first limit switch L1 has a hinge lever separated from the convex portion and the normally closed contact Nc1, the second limit switch L2 has the hinge lever pressed and the normally open contact No2, and the third limit switch L3. The hinge lever is located at the normally closed contact Nc3 away from the projection.

The transistor T for energizing the power supply relay R is at the output of the flip-flop F,
Is composed of two NANDs, the output of the NAND whose input becomes 0 is 1 and the output remains 1 even if the input returns to 1.
The output of the NAND on the other side is zero. Flip-flop F
Is connected to the output of the input gate PG having the operation switch P as an input. The capacitor Ci at the input of the inverter, together with the resistor connected thereto, prevents noise generated when the operation switch P is turned on and off. It is. When the operation switch P is pressed, one of the inputs of the OR through the resistor becomes 0, and the output capacitor Co is charged through the resistor of the output of the inverter. Is set to 0, so that the output of OR is set to 0 for a predetermined time and returns to 1 even if it is pressed further. When the output of the flip-flop F is inverted from 0 to 1, the power supply relay R is activated via the transistor T, and at the same time, the timer TM is started. Timer TM
Then, the capacitor Ct is charged via the resistor, and the output of the inverter is inverted to 0 after a certain period of time. As a result, the other input of the flip-flop F becomes 0,
The output of the flip-flop F is returned to 0, and the energization of the drive relay R is cut off via the transistor T.
The charged capacitor Ct at the input of M is rapidly discharged through the diode, and the output of the timer TM returns to 1. It is sufficient that the time constant of the capacitor Co and the resistance of the input gate is longer than the time when the output of the flip-flop F is set to 1.

When the changeover switch S operated from the outside is in the position shown in the figure and the input of the flip-flop F via the input gate PG is 1 and the output is 0, the power supply relay R via the transistor T is connected. Is not energized, the contact r of the power supply relay R is at the position shown in the figure, and the hinge lever is not pushed in the first limit switch L1 and the third limit switch L3, and the normally closed contacts Nc1 and Nc3 shown in the figure In the second limit switch L2, when the convex portion of the detection body is on the normally open contact No. 2 side by pushing the hinge lever, the drive current does not flow from the drive power supply Vd to the motor M, and the water drainage plug V is closed. Stopped in the closed state. When the operation switch P is pressed from this state, the water drainage plug V is opened as described below, and after a certain period of time, returns to the original closed state of the water stoppage and stops.

That is, when the operation switch P is turned on, the output of the closing gate PG becomes 0 for a predetermined time. As a result, the output of the flip-flop F is inverted to 1 and a current flows from the control power supply Vc to the power supply relay R via the transistor T to energize the power supply relay R, while the timer TM
Start The contact r is switched from the position shown in the figure to the other end by the bias of the power supply relay R, and the direction of the arrow is indicated from the drive power supply Vd to the motor M, the normally closed contact Nc1 of the first limit switch L1, the first diode D1, and so on. Then, a current for driving the motor M flows to drive the drain valve V in the opening direction. When the water tap V starts to be driven in the opening direction, the detection body starts to rotate accordingly, and the second limit switch L
In 2, the convex portion of the detection body leaves the hinge lever and switches from the position shown in the figure to the normally closed contact Nc2 at the other end, but the drive current continues to flow through the motor M, the drain valve V opens, and water flows into the toilet. Start flowing. In the first limit switch L1 which detects the position when the water tap V is sufficiently opened, the hinge lever is pushed by the convex portion of the detection body and switches from the normally closed contact Nc1 in the figure to the normally open contact No1 at the other end, thereby driving current. Disappears, the motor M stops, and the drain valve V is opened, and sufficient water flows to the toilet. When the capacitor Ct of the timer TM is charged after a certain period of time, the timer T is set via the inverter.
When the output of M becomes 0 and the output of the flip-flop F returns from 1 to 0, the charged capacitor Ct is rapidly discharged by the diode, while the energization of the power supply relay R via the transistor T is cut off. The contact r returns to the position shown in the figure. Upon return of the contact r of the power supply relay R, the drive power Vd is supplied to the motor M via the second diode D2, the switch S in the position shown in the figure, and the normally closed contact Nc2 of the second limit switch L2 switched from the position shown in the figure. , A drive current flows in the direction opposite to the arrow in the figure, and drives the water drainage V in the closing direction. When the water drainage V starts to be driven in the closing direction, the first limit switch L1 returns to the normally closed contact Nc1 from the normally opened contact No. 1 that has been pressed, but the drive current continues to flow through the motor M, and the water drainage is stopped. V closes. When the water drainage stopper V is stopped, the hinge lever of the second limit switch L2 is pushed to return to the normally open contact No. 2 in the figure, the drive current is lost, the motor M is stopped, and the water drainage stopper V is closed. It returns to the state and the water flowing to the toilet stops.

As described above, when the operation switch P is pressed while the changeover switch S is at the position shown in the figure, the water drainage valve V is opened and the toilet is flushed. Returns to the state.

When the changeover switch S is switched to the other end when the water drainage stopper V is in the closed state, the motor M is connected to the drive power supply Vd from the power supply relay contact r, the second diode D2, and the other end in the figure. A drive current flows in the direction opposite to the arrow shown in the figure via the normally closed contact Nc3 of the third limit switch L3 and the changeover switch S, thereby driving the water drainage plug V further in the plugging direction. While the hinge lever of the second limit switch L2 is pushed to return to the normally open contact No.
When water is drained, the hinge lever is also pushed by the third limit switch L3 to switch from the position shown in the figure to the normally open contact No. 3 at the other end, the drive current stops running, the motor M stops, and the drain valve V is closed. , And discharges the water stored in the pipe from the drain valve V to the toilet.

When the operation switch P is pressed from the closed state of the drainage, the drain plug V is opened as follows, and after a certain period of time, returns to the closed state of the drainage and stops.

That is, when the operation switch P is turned on, the output of the input gate PG becomes 0 for a predetermined time, the output of the flip-flop F is inverted to 1, the power supply relay R is energized via the transistor T, and the timer is turned on. Start TM. The contact r is switched from the position shown in the figure to the other end by the bias of the power supply relay R, and the direction of the arrow is indicated from the drive power supply Vd to the motor M, the normally closed contact Nc1 of the first limit switch L1, the first diode D1, and so on. Then, a current for driving the motor M flows to drive the drain valve V in the opening direction. When the drain valve V is driven in the opening direction, the convex portion leaves the hinge lever by the third limit switch L3 and becomes a normally closed contact Nc3 at the position shown in the figure. The stopper V is driven in the opening direction. Immediately before the water stopper V is driven and the convex portion leaves the hinge lever by the second limit switch L2, the water stoppage is in the closed state as described above, and the switch is switched over to the normally closed contact Nc2 at the other end in the figure. The drive current continues to flow through the motor M,
Is further driven in the opening direction, and the water starts to flow. In the first limit switch L1 which detects the position when the water tap V is sufficiently opened, the hinge lever is pushed by the convex portion of the detection body and switches from the normally closed contact Nc1 in the figure to the normally open contact No1 at the other end, thereby driving current. Disappears, the motor M is stopped, and the water drain valve V is opened, so that sufficient water flows into the toilet. When the output of the timer TM becomes 0 after a certain period of time and the output of the flip-flop F returns from 1 to 0, the transistor T
And the contact r is returned to the position shown in the figure. The return of the contact r of the power supply relay R causes the drive power supply Vd to switch the second diode D2, the changeover switch S at the other end of the drawing, and the third limit switch L at the position shown in the drawing.
3, a drive current flows in the motor M in the direction opposite to the direction of the arrow in the figure, and drives the water drain V in the closing direction. When the drain plug V starts to be driven in the closing direction, the first limit switch L1 returns to the normally closed contact Nc1 from the pressed contact No. 1, but the drive current continues to flow through the motor M. When the water drainage stopper V is driven in the closing direction and the amount of water flowing to the toilet decreases, and finally the water stops, the hinge lever of the second limit switch L2 for detecting the state is pushed to the normally open contact No. 2 in the figure. However, the drive current continues to flow as before, and further drives the water drainage V in the closing direction. When the drain valve V is further driven and drained while the hinge lever of the second limit switch L2 is being pressed, the hinge lever of the third limit switch L3 is pushed by the convex portion of the detection body and becomes the normally open contact No3. Then, the drive current of the motor M is cut off, and the drain valve V returns to the closed state of the drainage and stops.

As described above, when the operation switch P is pressed while the changeover switch S is at the other end of the drawing, the water drainage plug V is opened, and after a certain period of time, the drainage water returns to the original closed state. And stop. Even if the changeover switch S is returned to the position shown in FIG.
No drive current flows. When the operation switch P is pressed from this state, the contact r of the power supply relay R is switched to the other end of the drawing, and the normally closed contact Nc of the first limit switch at the position shown in the drawing.
1 and a driving current flows in the motor M in the direction of the arrow through the first diode D1, and the third limit switch L3
From the normally open contact No. 3 at the other end of the drawing to the normally closed contact N at the position shown in the drawing.
Returning to c3, the second limit switch L2 switches from the normally open contact No. 2 at the position shown in the drawing to the normally closed contact Nc2 at the other end, and the first limit switch L1 switches from the position shown in the drawing to the normally open contact No. 1 at the other end. When the drive current of the motor M disappears and the water drainage plug V is opened, and after a certain time, the power supply relay R is turned off and the contact r returns to the position shown in FIG. A drive current flows through the diode D2, the position changeover switch S in the figure, and the normally closed contact Nc2 of the second limit switch L2 at the other end in the figure to drive the water drain V in the closing direction, and the first limit switch L
When 1 is returned to the normally-closed contact Nc1 in the figure and the second limit switch L2 is returned to the normally-opened contact No. 2 in the figure, the drive current is lost, and the water drainage plug V is stopped in the closed state of water stoppage. All the contacts return to the positions shown in the figure. Hereinafter, the operation is performed when the changeover switch S described above is at the position shown in the figure.

In the above description, the input of the closing gate PG uses the operation switch P, but the input is not limited to this. For example, instead of the operation switch P, a photoelectric switch for detecting the presence or absence of a person is employed. The output OR becomes 0 for a predetermined time, the flip-flop F is inverted, the power supply relay R is energized, and the water drainage plug V is driven in the opening direction. In this case, the capacitor Co charged when no person is present is discharged when a person comes out, and starts to charge when no person is present. However, when the charge is started after fully discharged, the output of the OR is set to 0 for a predetermined time. So the capacitor C
If o is not sufficiently discharged, the output of OR does not become 0,
The flip-flop F does not invert. In other words, the flip flop F is not
Is reversed, the power supply relay R is energized, and the water drainage plug V is driven in the opening direction, and the input gate PG does not operate for a person who only passes through the detection range of the photoelectric switch,
The drain plug V is not driven in the opening direction.

Although the operation of the changeover switch S is performed by a human, the temperature switch is used to switch to the position shown in the figure when water is not frozen and to the other end in the figure when water is frozen. Of course it doesn't matter.

[0018]

As described above, according to the present invention, it is possible to select the position for closing the water drainage by an external operation. also stopped and further stoppered position drainage state of discharging the water driven to drainage Sen以later in the pipe from, a season without risk of freezing of water stoppered position waterproofing state not drained by simply stopping the water By doing so, in the season when there is no danger of water freezing, it is economical because it only stops water and does not drain, and the next user does not have to worry about the time when water comes out, This has the effect.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing one embodiment of the present invention.

[Explanation of symbols]

 Vc Control power supply Vd Driving power supply M Motor V Drain plug D1 First diode D2 Second diode S Changeover switch L1 First limit switch L2 Second limit switch L3 Third limit switch No1 Normal of first limit switch Open contact Nc1 Normally closed contact of the first limit switch No2 Normally open contact of the second limit switch Nc2 Normally closed contact of the second limit switch No3 Normally open contact of the third limit switch Nc3 Normally the third limit switch Closed contact R Power relay r Power relay contact PG input gate P Operation switch TM Timer F Flip-flop T Transistor Ci, Co, Ct Capacitor

Claims (1)

(57) [Claims] An outlet, an outlet, and a drain for water;
An open state in which the outlet and the inlet are connected and blocked from the drain
And the outlet and inlet are shut off and the drain is shut off
When the water stops, the outlet and inlet block, and the drain
A module that opens and closes a drain valve that has a drain state that communicates with the outlet
One of the motors is connected to one of the DC power supplies whose polarity is changed by an external operation.
With connecting to the other of the DC power source via a first limit switch and the forward direction of the first diode which detects the unplugging state, second limit Sui detecting water stopping state of the drain tap
3rd limit switch to detect the drainage status of the switch and drain
And a switch connected to the other side of the DC power supply via a second diode in a direction opposite to a switch that is switched by an external operation.