JP4292772B2 - Water supply control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water supply control device.
[0002]
[Prior art]
In a water supply control device used in a kitchen or the like, the main operation is to repeatedly discharge and stop water while washing dishes such as dishes by hand. In such products, there are things such as a structure in which water is discharged and water is stopped by a foot switch that detects an input by pressing a switch with a foot. In this way, a manual valve (for example, a handle type manual valve in a single lever faucet, etc.) and a solenoid valve are connected in series, the manual valve is kept open, and the solenoid valve is opened and closed by electronic control. A technique for realizing water discharge and water stoppage from the water is well known (for example, see Patent Document 1).
Also, a water supply control device using a self-holding solenoid valve that is driven by a commercial power supply (a latch-type valve that changes the state of the valve when necessary power is applied and remains in that state when power is not applied) In some cases , the self-holding solenoid valve is closed after detecting a power failure by detecting a power failure of the commercial power supply (see, for example, Patent Document 2).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-217399 (first page, FIG. 1)
[Patent Document 2]
JP-A-6-108508 (first page, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in a system consisting of a self-holding solenoid valve that is connected to a flow path in series with a conventional manual valve and that opens and closes the flow path with a commercial power supply, when the commercial power supply fails, the self-holding solenoid valve is closed. Since it was maintained, there was a problem that during the power outage, even if the manual valve was operated to open, water was not discharged from the water supply control device, and the user could not use water.
Further, because it does not have the means for detecting the power failure recovery of the commercial power supply, after a power failure is restored, it is possible to reliably return to normal operation there is also a problem that is not guaranteed.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is configured as follows.
[0006]
A water supply control device according to claim 1 of the present invention is a self-holding device that manually opens and closes a flow path toward the water discharge end side, and opens and closes the flow path by a commercial power source connected to a flow path in series with the manual valve. Type solenoid valve, a control unit that drives and controls the self-holding solenoid valve, a voltage drop detection unit that detects a drop in the commercial power supply, an operation unit that instructs opening and closing of the self-holding solenoid valve, and the commercial unit Back-up means for holding power to open the self-holding solenoid valve in response to a supply from a power source, and the control unit is configured to receive an operation command from the operation unit while the voltage drop detection unit is detecting a low voltage. To open the self-holding solenoid valve.
[0007]
Accordingly, even if fit cut off the power supply from the commercial power source, it is possible to open the self-holding type solenoid valves at any time by keeping the power of the backup means, after the self-holding type solenoid valve is opened The water can be discharged and stopped by opening and closing the manual valve.
[0008]
In other words, when the control unit detects a drop in the voltage of the commercial power supply, it shifts to the low power consumption mode to keep the power of the backup means, and when the operation command from the user is accepted, it applies the power of the backup means to the self-holding solenoid valve The self-holding solenoid valve is shifted to the open state. The user by performing the opening and closing operation of the manual valve even during a power failure, it is possible to feed water control device operates the water discharge and water stop.
[0009]
In addition, the water supply control device according to claim 2 of the present invention further includes voltage return detection means for detecting voltage return of the commercial power supply, and when the voltage return detection unit detects voltage return of the commercial power supply, The control unit stops the operation during a power failure, and returns to an initial state in which a drive signal for an opening operation or a closing operation is output to the self-holding solenoid valve according to an operation signal from the operation unit. To do.
[0010]
Thus, by providing the voltage recovery detection unit, when the commercial power supply recovers from a power failure, the voltage recovery can be reliably detected, the control unit can start operation from the normal initial state, and the water supply control device can be safely operated. It is possible to return to normal operation.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
【Example】
Next, embodiments of the present invention will be described based on examples. FIG. 1 is a system diagram of Embodiment 1 according to the present invention. In FIG. 1, 1 is a commercial power source, 2 is a control unit, 3 is backup means, 4 is a self-holding solenoid valve, 5 is a manual valve , 6 is a voltage drop in the commercial power source 1 and transmits a signal to the control unit 2. The voltage drop detection unit 7 is an operation unit that inputs a user operation command and transmits a signal to the control unit 2 . Thus, the self-holding solenoid valve 4 and the manual valve 5 are connected in series, and the control unit 5 receives power supply from the commercial power source 1 and opens the self-holding solenoid valve 4 to the backup means 3 at least once. Holding power. When the voltage drop detection unit 6 detects a voltage drop of the commercial power source 1 and the control unit 2 inputs the signal, the control unit 2 responds to the state of the self-holding solenoid valve 4 and the input signal from the operation unit 7. that controls the power of the backup means 3.
[0012]
Figure 2 is a system diagram of a second embodiment according to the present invention. From 1 to 8 in the figure omitted since it is common to FIG. Reference numeral 8 denotes a voltage recovery detection unit that detects voltage recovery of the commercial power source 1. As a result, when the commercial power source 1 returns from a power failure, the control unit 2 inputs a signal from the voltage recovery detection unit 8 to reliably stop the operation during the power failure, return to the initial state, and resume normal operation. It becomes possible.
[0013]
FIG. 3 is a circuit diagram of the second embodiment according to the present invention. Reference numeral 1 denotes a commercial power source, and 9 denotes an AC adapter that converts the commercial power source 1 into a DC voltage, and includes a voltage conversion transformer 9-a, a diode stack 9-b, and a capacitor 9-C. Reference numeral 6 denotes a voltage drop detection unit, resistors 6-a and 6-b that divide the output voltage of the AC adapter 9, a voltage detection IC 6-c that compares this divided value with a constant voltage and turns on when the commercial power supply fails. When the voltage generation IC 6-d and the diode 6-e for generating a constant voltage and the commercial power source 1 are cut off and the voltage detection IC 6-c is turned on, the capacitor 9-c in the AC adapter 9 is discharged and the interruption signal is sent to the controller 2 The transistors 6-f and 6-g that transmit to the input port PI1 and the pull-up resistor 6-h of the transistor 6-g are configured. 3 is a backup unit, the capacitor 3-b, a diode 3 for preventing the electric charge of the capacitor 3-b from flowing back to the voltage drop detection section that holds the power to open at least once a self-holding type solenoid valve 4 -A. Reference numeral 8 denotes a voltage recovery detection unit that detects that the commercial power source 1 has recovered the voltage, and includes an NPN transistor and a resistor, and an output signal thereof is transmitted to the input port PI2 of the control unit 2. Reference numeral 7 denotes an operation unit, which is configured by a contact switch, and an output signal thereof is transmitted to the input port PI3 of the control unit 2. Reference numeral 10 denotes a solenoid valve drive circuit. When a drive signal is output from the output port PO1 of the control unit 2, the self-holding solenoid valve opens or closes. Reference numeral 2 denotes a control unit, which is composed of a microcomputer (CPU). The input port PI1 inputs a power failure signal from the voltage drop detection unit 6, PI2 inputs a voltage recovery signal from the voltage recovery detection unit 8, and the input port PI3 inputs an operation signal from the operation unit 7. The output port PO1 outputs a drive signal for an opening operation or a closing operation to the self-holding solenoid valve 4.
[0014]
FIG. 4 is a time chart according to the present invention.
1) is a time chart when the voltage drop detection unit 6 detects a voltage drop when the self-holding solenoid valve 4 is kept closed and then the SW of the operation unit 7 is pressed. When the voltage drop detection unit 6 detects a voltage drop, a falling edge signal from On to Off is input to the input port PI1 of the control unit 2, and the control unit 2 can recognize the power failure of the commercial power source 1. Thereafter, when the SW of the operation unit 7 is pressed, the self-holding solenoid valve 4 opens. Thus, the user even during a power failure, by opening and closing the manual valve, it is possible to water discharge and water shut-off the water supply control apparatus.
2) is a time chart when the voltage drop detection unit 6 detects a voltage drop when the self-holding solenoid valve 4 is kept open, and then the SW of the operation unit 7 is pressed. In this case, the control unit 2 ignores the input signal from the operation unit 7 and maintains the open state without performing the closing operation of the self-holding solenoid valve 4.
3) is a time chart showing the input signals of the input ports PI1 and PI2 of the control unit 2 from the voltage drop of the commercial power supply 1 to the voltage recovery. When the voltage recovery of the commercial power source 1 is detected by the voltage recovery detection unit 8, a falling edge signal from On to Off is input to the input port PI 2 of the control unit 2, and the control unit 2 recovers the voltage of the commercial power source 1. Can be recognized. Thus, the control unit 2 returns to the initial state, it is possible to return to safe and reliable normal operation.
[0015]
5 and 6 are flowcharts showing the operation of the control unit 2 of the present invention.
[0016]
FIG. 5 shows a processing flow according to whether or not the SW 7 of the operation unit 7 is pressed and whether the self-holding solenoid valve 4 is open or closed when the voltage drop detection unit 6 detects a voltage drop of the commercial power supply 1. ing.
First, in S601, it is determined whether or not the input port PI1 of the control unit 2 is Off. If negative in S601, it is determined that the voltage drop of the commercial power source 1 has not been detected by the voltage drop detector 6, and the process jumps to the next routine. If the result is affirmative in S601, a power failure of the commercial power source 1 is recognized in S602, and the process shifts to the low consumption mode in S603. In the low consumption mode, the consumption of the microcomputer (CPU) and the like is suppressed as much as possible, and the discharge of the capacitor 3-b of the backup means 3 is suppressed to the maximum. Next, in S604, it is determined whether or not the SW of the operation unit 7 is turned on. If no in S604, the process jumps to the next routine. If affirmative in S604, it is determined in S605 whether the self-holding solenoid valve 4 is currently closed. If negative at S605, the current self-holding type solenoid valve 4 jumps to the next routine for an open state. If the result is affirmative in S605, the self-holding solenoid valve 4 is driven to the open side in S606, and then jumps to the next routine.
[0017]
FIG. 6 shows a processing flow when the voltage recovery detection unit 8 detects the voltage recovery of the commercial power supply 1.
First, in S701, it is determined whether a power outage is currently occurring. For more information on whether during a power failure judgment of, has said in the S601 and S602 of FIG. If negative in S701, the process jumps to the next routine. If affirmative in S701, it is determined in S702 whether the input port PI2 of the control unit 2 is Off. If negative in S702, it is determined that the voltage of the commercial power source 1 has not been restored, and the process jumps to the next routine. If the result is affirmative in S702, it is determined that the voltage of the commercial power source 1 has been restored, and the process jumps to the initial. Note that the interrupt function of the microcomputer may be used in S702, and the interrupt function may be activated when the input port PI2 is turned off, and then jump to the initial.
[0018]
【The invention's effect】
According to the present invention, in claim 1, by providing the voltage drop detection unit and the operation unit, even if the power supply from the commercial power source is cut off, the commercial power source is self-maintained by the backup means during a power failure. Can hold the electric power to open the solenoid valve, and can open the self-hold solenoid valve by the user's operation command. and it becomes possible to perform water discharge and water stop operation of Rikyu water control device by the opening and closing operation of the manual valve connected in series.
[0019]
According to the second aspect of the present invention, by further providing a voltage recovery detection unit, when the commercial power supply recovers from a power failure, the voltage recovery can be reliably detected, and the control unit can start operation from a normal initial state. Can be safely returned to normal operation.
[Brief description of the drawings]
According to the system diagram of the first embodiment according to the invention, FIG system diagram of the second embodiment according to the present invention; FIG circuit diagram of Figure 3 according to the second embodiment of the present invention [4] The present invention flow chart showing the operation of the control unit of the flowchart Figure 6 the present invention showing the operation of the control unit of the time chart Figure 5] this invention description of Reference numerals]
DESCRIPTION OF SYMBOLS 1 ... Commercial power supply 2 ... Control part 3 ... Backup means 3-a ... Diode 3-b ... Capacitor 4 ... Self-holding solenoid valve 5 ... Manual valve 6 ... Voltage drop detection part 6-a ... Resistance 6-b ... Resistance 6 -C ... Voltage detection IC
6-d ... Voltage generation IC
6-e ... Diode 6-f ... Transistor 6-g ... Transistor 6-h ... Resistance 7 ... Operating unit 8 ... Voltage recovery detector 9 ... AC adapter 9-a ... Voltage conversion transformer 9-b ... Diode stack 9-c ... Capacitor

Claims (2)

  A manual valve that manually opens and closes the flow path toward the water discharge end, a self-holding solenoid valve that is connected to a flow path in series with the manual valve and that opens and closes the flow path with a commercial power source, and drives the self-holding solenoid valve A control unit for controlling, a voltage drop detection unit for detecting a drop in the commercial power supply, an operation unit for instructing opening / closing of the self-holding solenoid valve, and a self-holding solenoid valve that receives supply from the commercial power source. Back-up means for holding electric power to be opened, and the control unit opens the self-holding solenoid valve by an operation command from the operation unit while the voltage drop detection unit is detecting a low voltage. A water supply control device. While having a voltage recovery detection means for detecting the voltage recovery of the commercial power source, and when the voltage recovery detection unit detects the voltage recovery of the commercial power source, the control unit stops the operation during a power failure and from the operation unit 2. The water supply control device according to claim 1, wherein the water supply control device returns to an initial state in which a drive signal for an opening operation or a closing operation is output to the self-holding solenoid valve in response to the operation signal.

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