JP2579578B2 - Control device for electromagnetic water valve with electromagnetic drain valve - 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 device for an electromagnetic water supply valve having an electromagnetic drain valve used in a cold region, particularly in a flush toilet.

[0002]

[Prior art]

[0003] Conventionally, motor-driven electric drain valves are often used in flush toilets in cold regions. This is when the user presses the push button switch,
The motor of the drive unit rotates, the spindle is screwed down to the rotating body that is decelerated by the gear and meshes with the final gear, and the piston connected to the spindle is moved up and down to allow water to flow. After the lapse of time, the motor is reversed, the piston is moved backward to stop the water, and further moved to the drainage state to drain the water in the pipe.

[0004] 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 discharged even when the water is not frozen, which is uneconomical. In addition, the next time water is discharged, especially if the piping is long, there is a drawback that it takes time until the water is discharged. Furthermore, since the rotation of the motor is slowed down and the piston is moved from the drained state to the water stopped state and the water flowing state by the screw, it takes more time until the water comes out, giving the user anxiety or misidentifying it as a failure. Had the consequence of causing

[0005]

In the present invention, instead of a motor-driven drain valve that requires a long time to operate, a solenoid valve that operates immediately upon energization is provided for water supply and drainage.
To provide a control device for an electromagnetic water supply valve having an electromagnetic drain valve that is used individually, drains water in a pipe for a certain period of time when there is a possibility of freezing, and immediately releases water when a user presses a push button switch. It is intended for.

[0006]

According to the present invention, there is provided a temperature switch for detecting a temperature and an electromagnetic water supply which is inverted by an external signal.
A first timer that opens the valve and returns after a certain time to close the electromagnetic water supply valve, a flip-flop that inverts and holds the output by the return of the first timer, and that the output of the temperature switch is below a predetermined temperature, When the first timer has recovered, the inverted flip-flop signal is output to open the electromagnetic drain valve, and after a certain period of time, the output of the flip-flop is returned and the electromagnetic drain valve is closed and held. The two timers, the electromagnetic water supply valve and the electromagnetic drain valve , are controlled by the two timers to perform the operation of the cutoff water and the drainage.

[0007]

Therefore, unlike a motor-driven electric valve, there is no need for the piston to shift from a drained state to a water-stopped state through a water-stop state. It drains water only when there is a risk of freezing, so it is economical and you do not have to worry about the time it takes to drain.

[0008]

FIG. 1 shows an embodiment of the present invention, in which V is a control power source, T1 is a first timer, and a push button switch Sw is shown.
Is not pressed, one input of the NAND input directly from the push button switch Sw is 0, the other input of the capacitor via the inverter and the resistor is 1, the output of the NAND is 1, and the output of the NAND is 1 through the resistor. The capacitor is charged and the output t of the first timer T1 via the inverter.
Is 0. When the push button switch Sw is pressed, one of the inputs of the NAND input directly from the push button switch Sw is 1, the output of the inverter becomes 0, and the capacitor is discharged via the resistor, but only for a predetermined time. Since "1" is held, the output of the NAND becomes "0" during that time. Therefore, the charged capacitor on the output side of the NAND is rapidly discharged by the diode, and the output t of the first timer T1 via the inverter is inverted to 1. Even if the push button switch Sw is kept pressed, the input capacitor of the NAND is discharged after a lapse of a predetermined time, the output of the NAND becomes 1, and the output capacitor is charged via the resistor.
After a certain time, the output t of the first timer T1 via the inverter returns to zero. It should be noted that the time constant of the NAND input resistor and the capacitor is sufficient if the output capacitor that has been charged when the NAND output becomes 0 is discharged through the resistor and the diode. The series resistor is a current limiting resistor that protects the output of the NAND when discharging the capacitor.

The output t of the first timer T1 controls the water supply relay R1 via a transistor, and the water supply relay R1 is energized only while the output t is inverted to 1. The output t of the first timer T1 is directly input to one of the ORs, while the output of the OR is connected to another input of the OR through an inverter and a resistor, and the output of the OR is the output of the first timer T1. Only when t returns from 1 to 0 is the predetermined time 0.

The output of OR is connected to one input of a flip-flop F made of two NANDs, and the output Q of the flip-flop F is connected to one of three inputs of AND. Ts connected to the AND input is a temperature switch, which outputs 0 when the water does not freeze and 1 when the water might freeze, by means of the temperature sensing element S. Another AND input is connected to the output t of the first timer T1 via an inverter with a certain time delay by a resistor and a capacitor. In the case of charging, the capacitor is connected for a certain time determined by the resistance. In the case of discharge, the discharge is suddenly made by a diode and a resistor which are in parallel with the resistor. The resistor in series with the diode is a current limiting resistor that protects the output of the inverter when discharging the capacitor.

T2 is a second timer. The three-input AND output controls the drainage relay R2 via a transistor, and the drainage relay R2 is energized only when the output is one. However, at the same time, the capacitor is charged via the resistor, and after a certain time, the other input of the flip-flop F is set to 0 via the inverter. As a result, the output Q of the flip-flop F returns to 0, the output of AND becomes 0, the transistor is cut off, the energization of the drainage relay R2 is cut off, and the capacitor charged at the same time passes through the diode and the resistor. Discharges rapidly. The resistor in series with the diode is a current limiting resistor that protects the AND output when the capacitor discharges.

In FIG. 2, r1 and r2 are respectively shown in FIG.
S1 is a contact of relay R1 for water supply and R2 for drainage.
Solenoid of electromagnetic water supply valve, S2 is solenoid of electromagnetic drain valve
V1 is an electromagnetic water supply valve, and V2 is an electromagnetic drain valve . When the relay R1 for water supply biases contacts r1 is switched to the other end from the position of FIG. 2, the water supply electromagnetic supply valve V1 is open solenoid S1 of the solenoid water valve is energized to the toilet (not shown), the biasing Disappears, the contact point r1 returns to the position shown in FIG.
The electromagnetic water supply valve V1 closes and stops water supply . Relay R2 for drainage
Contact r2 is switched to the other end from the position of FIG. 2 when but energizing, the water in the pipe is discharged to reach the toilet by opening the solenoid drain valve V2 to the solenoid S2 of the solenoid drain valve is energized, the biasing is eliminated solenoid drain valve contacts r2 is returned to the position of FIG. 2 V2
Is closed and drainage ends.

When the push button switch Sw is pressed during the season when the water does not freeze, the electromagnetic water supply valve V
1 opens and the electromagnetic drain valve V2 does not open. First, when the water is not frozen, the output of the temperature switch Ts is 0.
The output remains at 0 even if the other of the inputs AND changes, the drainage relay R2 via the transistor is not activated, and the electromagnetic drainage valve V2 does not open. When the push button switch Sw is pressed in this state, one of the inputs of the NAND input directly from the push button switch Sw becomes 1, the output of the inverter becomes 0, and the charged capacitor is discharged via the resistor. It goes, but it keeps 1 for a predetermined time, and during that time, the output of the NAND becomes 0. Thus, the charged capacitor on the output side of the NAND is rapidly discharged by the diode, and the output t of the first timer T1 via the inverter is inverted from 0 to 1.
As a result, the transistor becomes conductive and the water supply relay R
1 is energized, opens the solenoid supply valve V1 current is flowing through the solenoid S1 of the solenoid supply valve, water flows to the toilet bowl. From the output t of the first timer T1 through the inverter and the resistor,
Where the input leads to an AND input with a capacitor , the output of the inverter becomes zero, and the charged capacitor is rapidly discharged by the diode and the resistor. Even if the output t of the first timer T1 is inverted from 0 to 1, the output of OR remains unchanged at 1. In this state, even if the pressed push button switch Sw is released or kept pressed, the output of the NAND becomes 1 when the capacitor via the inverter is discharged after a predetermined time has elapsed, and the output capacitor is connected via the resistor. Begins to charge. After a certain time, the output t of the first timer T1 via the inverter returns from 1 to 0. This cut off the transistor which has been conducting, there is no biasing of the water supply for the relay R1, it closed solenoid supply valve V1 gone current of the solenoid S1 of the solenoid supply valve, stopping the water flowing in the toilet. On the other hand, as the output t of the first timer T1 returns from 1 to 0, the OR output becomes 0, and the output Q of the flip-flop F is inverted to 1 if it was 0 before. After a predetermined time elapses after the output t of the first timer T1 returns from 1 to 0,
The capacitor at the input of the OR through the inverter is charged to 1 and the output Q of the flip-flop F maintains the state inverted to 1. Also, the output t of the first timer T1
Is returned from 1 to 0, the capacitor of the three-input AND input through the inverter and the resistor is charged. However, since the output of the temperature switch Ts is 0, the drainage relay R2 through the transistor becomes Not energized. The input of the flip-flop F from the AND via the inverter having a resistor and a capacitor at the input remains at 1.

The above operation is repeated during the season when the water does not freeze. That is, when the push button switch Sw is pressed, the output t1 of the _first timer T1 is inverted from 0 to 1, and the water supply relay R1 is energized, and the solenoid S of the electromagnetic water supply valve is turned on.
1 flows, water flows by opening the electromagnetic water supply valve V1.
After a certain time, the output t1 of the _first timer T1 changes from 1 to 0.
Return to, there is no biasing of the water supply for the relay R1, electromagnetic supply
When the current of the solenoid S1 of the water valve disappears, the electromagnetic water supply valve V
1 closes and the water stops. At this time, the output of the OR becomes 0 for a predetermined time, but the output Q of the flip-flop F keeps the inverted state as it is 1, and the capacitor of the three-input AND is charged to become 1, but the temperature becomes 1 Since the output of the switch Ts is 0, the output of the AND remains 0, and the drainage relay R2 via the transistor is not activated.

[0015] When the water gets cold in a state where the water is not flowing and there is a possibility that the water freezes, the following procedure is performed for a fixed time as follows.
The electromagnetic drain valve V2 opens to drain water in the pipe to the outside to prevent freezing. That is, when the temperature drops and the water may freeze, the temperature switch Ts
Outputs 1. Since the input to AND from other than the temperature switch Ts is 1, the output of AND becomes 1. As a result, the transistor is turned on, the drain R2 is energized, the solenoid S2 of the electromagnetic drain valve is energized, the electromagnetic drain valve V2 is opened, and the water in the pipe is discharged. On the other hand, as the AND output becomes 1, the input capacitor of the inverter is charged via the resistor in the second timer T2. When the capacitor has been sufficiently charged after a certain period of time, the other input of the flip-flop F becomes 0 through the inverter, and the inverted output Q of the flip-flop F returns to 0. This return to the output of the AND of the three inputs are 0, energization of the relay R2 for drainage by blocking the transistor which has been conducting is released, electrostatic
Electromagnetic drainage due to the de-energization of solenoid S2 of the magnetic drain valve
The valve V2 closes and drainage ends. On the other hand, the charged input capacitor of the inverter rapidly discharges through the diode and the resistor, and the other input of the flip-flop F becomes 1
However, the output Q of the restored flip-flop F remains at 0. Each of the three inputs of AND is 0 from the flip-flop F, 1 from the temperature switch Ts, and 1 from the output t of the first timer T1 via the inverter and the resistor, and the capacitor is charged.

When the push button switch Sw is pressed during the season when the water may freeze, the water supply relay R1 is energized for a fixed time to open the electromagnetic water supply valve V1, as follows.
After a predetermined time after the electromagnetic water supply valve V1 is closed, the drainage relay R2 is energized for a predetermined time and the electromagnetic drain valve V2 is opened. When the push button switch Sw is pressed, in the first timer T1, the output of the NAND becomes 0 for a predetermined time, during which the charged capacitor on the output side of the NAND is rapidly discharged by the diode and passed through the inverter. The output t of the first timer T1 is inverted from 0 to 1.
As a result, the transistor becomes conductive and the water supply relay R
1 is energized, a current flows through the solenoid S1 of the electromagnetic water supply valve , the water supply electromagnetic valve V1 opens, and water flows into the toilet. At the same time, in the AND input capacitor of three inputs from the output t of the first timer T1 via the inverter and the resistor, the capacitor which has been charged when the inverter becomes 0 is rapidly discharged to 0 by the diode and the resistor. When a predetermined time has elapsed from this state and the output of the NAND of the first timer T1 becomes 1, the capacitor of the output of the NAND starts to be charged via the resistor, and after a certain time, the capacitor of the first timer T1 via the inverter has started. The output t returns from 1 to 0. As a result, the conducting transistor is cut off, the energization of the water supply relay R1 is stopped, the current of the solenoid S1 of the water supply solenoid valve is lost, the water supply solenoid valve V1 is closed, and the water flowing into the toilet stops. When the output t of the first timer T1 is 1
As a result, the output of OR becomes 0 for a predetermined time, and the state that the output Q of the flip-flop F is inverted to 1 is maintained. Further, the output t of the first timer T1
Returns from 1 to 0, the capacitor of the three-input AND input via the inverter and the resistor is charged. When the capacitor is sufficiently charged after a certain period of time, the output of the temperature switch Ts becomes 1 The output of the input AND becomes 1. This is energized relay R2 is drainage through the transistor current flows through the solenoid S2 of the solenoid drain valve, the solenoid drain valve V2 is discharging water in the pipe is opened. Also, as the AND output becomes 1, the second
When the input capacitor of the inverter of the timer T2 is charged through the resistor and is sufficiently charged after a certain period of time, the other input of the flip-flop F is set to 0. As a result, the output Q of the flip-flop F, which has been inverted to 1, returns to 0, the output of AND becomes 0, and the drainage relay R2 via the transistor is cut off, so that the current of the solenoid S2 of the electromagnetic drainage valve is reduced. Then, the electromagnetic drain valve V2 is closed, and the drain is completed. On the other hand, as the output of AND becomes 0, the input capacitor of the inverter of the second timer T2 is rapidly discharged through the diode and the resistor, and the input of the flip-flop F through the inverter returns to 1,
The output Q of the flip-flop F maintains the state of returning to 0.

As described above, when the push button switch Sw is pressed during the season when the water may freeze, the water supply relay R1 is energized for a fixed time, and the energization of the water supply relay R1 is stopped. After a certain period of time, the drainage relay R2 is energized for a certain period of time. Therefore, in order to prevent a water hammer generated when water is rapidly cut off, the solenoid S1 of the electromagnetic water supply valve is used as the electromagnetic water supply valve V1.
Even if a device that closes mechanically slowly after the current has disappeared is used, water that has passed through the electromagnetic water supply valve V1 does not leave the electromagnetic drain valve V2 as it is. When the output of the inverter is directly input to the AND from the output t of the first timer T1 by omitting the resistance and the capacitor via the inverter, the drainage relay R2 is connected immediately after the water supply relay R1 is de-energized. Drainage starts as soon as the water supply ends, but there is no worry about water hammer
When the electromagnetic water supply valve V1 is used, which closes at the same time as the current of the solenoid S1 of the electromagnetic water supply valve is lost, the electromagnetic water supply valve V1
The water that has passed does not leave the electromagnetic drain valve V2 as it is.

When the push button switch Sw is pressed while the electromagnetic drain valve V2 is open and draining, the output t of the first timer T1 becomes 1, thereby activating the water supply relay R1. To open the electromagnetic water supply valve V1. Meanwhile, the first
The output t of the timer T1 becomes 1, and the input capacitor of AND, which has been charged through the inverter, is rapidly discharged through the resistor and the diode, and the output of AND becomes 0. The electromagnetic drain valve V2, which was open due to the release of the bias of R2, is closed. Again,
Water passing through the electromagnetic water supply valve V1 does not leave the electromagnetic drain valve V2 as it is.

The above operation is repeated during the season when the water freezes. When the water no longer freezes, the output of the temperature switch Ts becomes 0 by the temperature sensing element S, and the output of the AND becomes 0.
Relay R2 for the drainage will not be biased become, electromagnetic
The drain valve V2 remains closed. Thereafter, the operation during the season when the water does not freeze as described above is repeated.

In the above description of the operation, the push-button switch Sw is used to input a signal from the outside, but the signal is not limited to this. For example,
A photoelectric switch for detecting the presence or absence of a person is employed in place of the push button switch Sw. If 0 is inputted when there is a person and 1 is inputted when there is no person, the first timer T1 is used when the person is gone. Nand becomes 0 for a predetermined time,
Thereby, the output t of the first timer T1 for a certain period of time is obtained.
Becomes 1 and the water supply relay R1 is energized to open the electromagnetic water supply valve V1 and water flows into the toilet. In this case, the capacitor of the input of the NAND that is discharging when there is no person is charged when a person comes, the person is discharged and the output of the NAND becomes 0 for a predetermined time when discharging, and so, If the input capacitor is not sufficiently charged, the output of the NAND does not become 0, and the output t of the first timer T1 does not become 1. In other words, the first timer T1 works and water flows into the toilet only after the person who has stayed for a predetermined time or more disappears, and the first timer T1 does not work for those who only pass the detection range of the photoelectric switch. Water does not flow.

In the embodiment shown in FIG. 2, the electromagnetic water supply valve V1 and the electromagnetic water drain valve V2 are separated from each other. However, even if the respective casings are integrally formed and the individual solenoids are controlled therein. Of course it doesn't matter.

[0022]

As described above, according to the present invention, the temperature switch for detecting the temperature and the inversion by the signal from the outside are used.
Open the electromagnetic water supply valve V1, electromagnetic water supply to return to after a certain period of time
A first timer for closing the valve V1, a flip-flop for inverting and holding the output when the first timer returns, and a flip-flop when the output of the temperature switch is lower than a predetermined temperature and the first timer is returning. Outputs the flip-flop signal inverted for a certain period of time to open the electromagnetic drain valve V2.
Yellow, then to return the output of the flip-flop electromagnetic discharge
By a second timer to hold close the water valve V2, electrostatic
Two solenoid valves, a magnetic water supply valve V1 and a solenoid water drain valve V2 , are controlled so that water is supplied and stopped, and the drainage operation is performed only when there is a possibility that the water may freeze. Economical because the switch drains water only when there is a risk of freezing.Even if the piping is long, there is no need to worry about the time when water is drained unlike a motor-driven drain valve that takes a long time to operate. It has the effect of eliminating anxiety and irritation to the elderly.

[Brief description of the drawings]

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

FIG. 2 is a layout diagram showing positions of a solenoid and a solenoid valve of the solenoid valve controlled by the present invention.

[Explanation of symbols]

V Control power supply Sw Push button switch T1 First timer t First timer output R1 Water supply relay S Temperature sensing element Ts Temperature switch F Flip-flop Q Flip-flop output T2 Second timer R2 Drainage relay Vd driving power r1 water supply of the relay contact r2 solenoid V1 solenoid feed valve V2 solenoid drain valve solenoid S2 solenoid drain valve of the relay contact S1 Guard water supply valve for drainage

Claims (2)

(57) [Claims] 1. An electromagnetic water supply valve is opened by being inverted by an external signal.
The first tap to return after a certain time and close the electromagnetic water valve.
Immer, a flip-flop for inverting and holding the output when the first timer returns, and a predetermined
When the output of the temperature switch that outputs a discrete value at a temperature boundary is equal to or lower than a predetermined temperature and the first timer is reset, the inverted flip-flop signal is output to output the electromagnetic drain valve. Open, and after a certain time, return the output of the flip-flop and close and hold the electromagnetic drain valve.
Having an electromagnetic drain valve comprising a second timer
Control device for magnetic water supply valve . 2. The method according to claim 1, wherein when the output of the temperature switch is equal to or lower than a predetermined temperature and the first timer is reset, the inverted signal of the flip-flop is output after a predetermined time. 2. An electromagnetic power supply having an electromagnetic drain valve according to claim 1, wherein the output is output, and after a predetermined time, the output of the flip-flop is returned and held.
Water valve control device.