JP2001297676A - Control device for washing machine or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device for a dishwasher or a washing machine including a dryer having an electronic circuit for controlling loading and drive of loading, enhancing resistance to instantaneous break of an AC power supply, while reducing the capacity of a capacitor so that continuous program operation is ensured, even if instantaneous electrical failure occurs. SOLUTION: A pressure contact switch 3 is connected in parallel with a relay contact 2a arranged in a line of an AC power supply 1, the second pressure contact switch 5 is connected to the input terminal of a microcomputer 4 whose operation is started when the pressure contact switch 3 is turned on, and a control circuit 6 is arranged on the side of the AC power supply 1 beyond the pressure contact switch 3 for controlling the control terminal of the relay contact 2a. When the pressure contact switch 3 is operated, the control circuit 6 has a function of being controlled by the microcomputer 4 to turning on the relay contact 2a. When the second pressure contact switch 5 is operated, the control terminal of the relay contact 2a is controlled to turn the relay contact 2a off.

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 a washing machine, a dishwasher, a dryer and the like (hereinafter referred to as a washing machine) having a load and an electronic circuit for driving and controlling the load. The present invention relates to a system for supplying or interrupting power from an AC power supply to a device.

[0002]

2. Description of the Related Art Conventionally, a control device such as a washing machine has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG. 8, a press-contact switch 3 (a switch whose contact state changes only when an operating force is applied to the line connected to the AC power supply 1 and returns to the original state when the operating force is removed). ) Is arranged, and when the contact is closed by the pressure contact switch 3, a DC voltage is generated in the capacitor 27 via the transformer 25 and the rectifier circuit 26. Further, a DC voltage that has been made constant by the constant voltage circuit 28 is supplied as a power source of the microcomputer 4.

[0004] The output of the constant voltage circuit 28 is connected to the output side of the pressure switch 3 connected to the A side terminal of the AC power supply 1. Further, it is also supplied to an electronic circuit other than the microcomputer 4 and a load 8. When the pressure switch 3 is operated, the microcomputer 4 further reads a signal from a ZVP circuit (zero volt pulse circuit) 7 for detecting a zero cross of the AC power supply voltage, and recognizes that power has been supplied to the device. The transistor 22 is turned on from the output terminal, the coil 2b of the relay 2 is driven, the contact 2a connected in parallel with the pressure switch 3 is closed, and power is continuously supplied to the device even after the pressure switch 3 is opened. .

After that, when a series of operations are completed according to the microcomputer program, the transistor 22 is turned off by the output of the microcomputer 4, the relay contact 2a is opened, and the power supply to the device is stopped. The power is turned off by operating another pressure contact switch 5, the microcomputer 4 reads this and turns off the relay 2. Here, power for driving the relay coil is supplied from the capacitor 20.

[0006]

However, in such a conventional configuration, power supply to the control terminal of the relay contact 2a, which is a switch of the power supply line, is obtained from a DC rectifying capacitor in a circuit after the switch. Therefore, if the AC power supply 1 causes an instantaneous power failure, the power supply from the AC power supply 1 is stopped, so that the power is supplied to the relay coil 2b only by discharging from the capacitor. Even if the switch control ON signal from the microcomputer 4 continues, the DC power supply voltage required for driving the coil drops, and the relay contact 2a is opened.

When the relay contact 2a is opened, the power supply to the device is stopped. If a momentary power failure occurs during a series of selection operations according to the microcomputer program, the washing operation is stopped halfway. However, there is a problem that the function is not fulfilled as a device.

Therefore, even after the instantaneous power failure of the AC power supply 1, the operation is continuously performed from the state before the instantaneous power failure according to the microcomputer program, so that the capacitance value of the DC rectifying capacitor for driving the coil is set to a very large value. Measures were taken to prevent the condition from occurring. For this reason, there has been a problem that the size of the component is increased and the price is increased.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and increases the instantaneous power failure tolerance of an AC power supply while reducing the capacitance of a capacitor so that a program operation can be reliably continued even if an instantaneous power failure occurs. It is intended to be.

[0010]

According to the present invention, in order to achieve the above object, a pressure switch is connected in parallel to a switch arranged on an AC power supply line, and an input of a microcomputer which starts operation when the pressure switch is turned on. 2nd terminal
The pressure contact switch is connected, and a control circuit for controlling the control terminal of the switch is arranged on the side of the AC power supply from the pressure contact switch.When the pressure contact switch is operated, the microcomputer controls the control circuit to turn on the switch. When the pressure switch 2 is operated, it has a function of turning off the switch by controlling the control terminal of the switch.

[0011] This makes it possible to increase the instantaneous power failure tolerance of the AC power supply while reducing the capacitance of the capacitor, and to reliably continue the program operation even if an instantaneous power failure occurs.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a switch disposed on an AC power supply line, a pressure switch connected in parallel to the switch, and starts operation when the pressure switch is turned on. A microcomputer, a second pressure switch connected to the microcomputer input terminal, and a control circuit arranged on the AC power supply side of the pressure switch to control a control terminal of the switch, wherein the pressure switch is operated. When the microcomputer controls the control circuit to turn on the switch, and when the second press-contact switch is operated, the microcomputer controls the control terminal of the switch to turn off the switch. The control circuit for the control terminal is always configured on the AC power supply side from the switch so that the current can always be supplied. Even if the power supply causes a momentary power failure and the switch opens, as long as the microcomputer holds the switch control circuit output, the switch is turned on again when the AC power supply is re-energized after the momentary power failure, and the switch is turned on according to the microcomputer program. The washing operation can be continued from the state before the power failure. Therefore, this eliminates the need to consider that the power supply to the control terminal at the momentary power failure must be maintained for a certain period of time,
Despite being a capacitor having a small capacitance value, it is possible to increase the withstand voltage against instantaneous power failure of the AC power supply.

According to a second aspect of the present invention, there is provided a switch arranged on an AC power supply line, a pressure switch connected in parallel to the switch, a microcomputer which starts operation when the pressure switch is turned on, and the microcomputer. A second pressure contact switch connected to the input terminal;
A control circuit arranged on the AC power supply side from the press-contact switch to control a control terminal of the switch, and a holding circuit,
When the pressure contact switch is operated, the microcomputer turns on the control circuit via a holding circuit, and when the second pressure contact switch is operated, controls the control terminal of the switch via the holding circuit. It has a control function of turning off the switch, and can further improve the instantaneous power failure withstand capability of the AC power supply while reducing the capacitor capacity of the microcomputer power supply.

According to a third aspect of the present invention, there is provided a switch disposed on an AC power supply line, a control circuit disposed on the AC power supply side of the switch to control a control terminal of the switch, and an input / output of the control circuit or its A pressure-contact switch disposed in part, a microcomputer that starts operating when the switch is turned on, and a microcomputer that reads a voltage in a circuit that changes when the pressure-switch is operated and controls a control terminal of the switch And a function of controlling the on / off of the switch by operating the pressure contact switch, thereby increasing the instantaneous power failure tolerance of the AC power supply while reducing the capacity of the capacitor, and causing an instantaneous power failure. However, the program operation can be continued without fail and two And the pressure switch for the power-off can be reduced to one.

According to a fourth aspect of the present invention, there is provided a switch disposed on an AC power supply line, a control circuit disposed on the AC power supply side of the switch for controlling a control terminal of the switch, and a voltage divider for dividing the AC power supply voltage. A pressure switch disposed between the voltage dividing circuit and the switch control terminal;
A control circuit for controlling the control terminal of the switch by reading the voltage in the circuit that changes when the pressure switch is operated by the microcomputer that starts operating when the switch is turned on. And has a function of controlling the on / off of the switch by operating the pressure contact switch. The rating of the pressure contact switch can be further reduced, and the size of parts and the cost can be reduced.

According to a fifth aspect of the present invention, a switch disposed on an AC power supply line, a control circuit disposed on the AC power supply side of the switch for controlling a control terminal of the switch, and connected in series between the AC power supply lines And the capacitor
A pressure switch disposed between one output of the capacitor and a switch control terminal, a second control circuit, and a circuit that changes when the pressure switch is operated by a microcomputer that starts operating when the switch is turned on. A microcomputer control function of controlling a control terminal of a switch by reading the voltage by the microcomputer, and having a function of controlling on / off of the switch by operating the pressure contact switch, and obtaining a divided voltage from a capacitor Thus, actual power consumption (active power) for driving the switch can be reduced.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, a resistor is connected in parallel to one of the capacitors, and the output obtained from the capacitor is increased. The capacitance value can be reduced, the selection range of the resistance of the relay drive circuit and the current amplification factor of the transistor can be widened, and the easiness of design can be improved.

According to a seventh aspect of the present invention, there is provided a second switch having one contact and two contacts disposed on an AC power supply line, a pressure contact switch connected in parallel to a common terminal and a NO terminal of the second switch, and a pressure contact switch. A microcomputer and a DC power supply that start operating when turned on, a second press-contact switch connected to the microcomputer input terminal,
A switch control circuit connected to the microcomputer output for controlling the control unit of the switch;
A DC rectifier circuit for rectifying an AC power supply via a C terminal, wherein when a pressure switch is operated, a second switch is driven by a switch control circuit using the DC rectifier circuit as a power supply by a microcomputer output; When the switch is driven, the power supply to the switch control circuit is switched from the DC rectifier circuit to the DC power supply,
When the pressure contact switch is operated, the microcomputer controls the switch control circuit by the output of the microcomputer to turn off the second switch. The capacity of the capacitor is reduced, the instantaneous power failure tolerance of the AC power supply is increased, and the instantaneous power failure is increased. , The program operation can be surely continued, and when the switch is turned on, the coil current of the relay is obtained from the low-voltage DC power supply, so that power loss can be eliminated. In addition, since the time during which the current flows through the resistor in the DC rectifier circuit or the limiting resistor of the relay coil current generated from the AC power supply is short, heat generation can be suppressed.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIG. 1, an AC power supply 1 has a relay contact (switch) 2a of a relay 2 having a relay coil 2b at an A-side terminal. The pressure contact switch 3 is a switch of a type in which the state of the contact changes only while a manual operation force is applied, and the contact returns to the original state when the operation force is removed, and is connected in parallel to the relay contact 2a. . The microcomputer 4 has a built-in washing sequence program. The second pressure switch 5
It is input to the microcomputer 4. Control circuit 6
Is the relay 2 by the output from the microcomputer 4
Of the relay coil 2b.

The control circuit 6 includes a capacitor 6a and an anode of a diode 6b between an A-side terminal and a B-side terminal of the AC power supply.
With the configuration in which the cathode and the resistor 6c are connected in this order, a DC rectified power source is generated in the capacitor 6a, and the relay coil 2b
We are creating a power supply for power supply to Further, the transistor 6d has an emitter connected to the A-side terminal of the AC power supply 1,
The base is connected to the output of the microcomputer 4, the collector is connected to the relay coil 2b, and the opening and closing of the relay contact 2a is controlled by the output of the microcomputer 4 using the capacitor 6a as a power supply. In the actual circuit, a resistor for limiting the coil current of the relay 2 is connected to the coil, but is omitted in this embodiment.

The ZVP circuit 7 reads the zero volt voltage of the AC power supply 1 to generate a pulse, and the microcomputer 4 reads this signal to perform power supply to the device and various other functions. Reference numeral 8 denotes an electronic circuit and a load other than the microcomputer of the device.

The operation of the above configuration will be described. When the pressure switch 3 is operated, power is supplied to the microcomputer 4 and the microcomputer 4 starts operating.
A signal for turning on the transistor 6d is output. Here, a pulse is issued by detecting zero volts of the AC power supply 1, and
There is also a method in which the microcomputer 4 recognizes this signal and recognizes that power supply has started, and issues an ON signal for the transistor 6d.

Thus, a current flows through the relay coil 2b using the capacitor 6d as a power supply, and the relay contact 2a is closed. Even if the pressure switch 3 is opened in this state, the relay contact 2a is kept short-circuited by the operation of the microcomputer 4, and the power supply is continued. Electronic circuits other than the microcomputer and the load 8 perform a series of washing operations in accordance with the program of the microcomputer 4.

Here, if the AC power supply 1 is momentarily powered down for some reason (for example, lightning strike), the capacitor 6
Since no power is supplied to a, the coil current gradually decreases. And when it becomes below a certain value, relay contact 2
a is opened (when the instantaneous power failure time is short, the relay contact is not opened). At this time, it is assumed that the relay control output of the microcomputer 4 connected to the base of the transistor 6d holds the control output for turning on the transistor 6d.

Accordingly, when the power failure is released and the AC power supply 1 is restored again, the control output of the microcomputer 4 keeps the transistor 6d turned on, so that a current flows through the relay coil 2b and the relay contact 2a is turned on again. close.

When an instantaneous power failure occurs, the microcomputer 4 stops receiving pulses from the ZVP circuit 7, and reads this to recognize that an instantaneous power failure has occurred. I have. When the instantaneous power failure is released, the signal from the ZVP circuit 7 is detected, and the process starts again. When a series of washing operations is completed, the transistor 6d is turned off by the output of the microcomputer 4, the relay contact 2a is opened, and the power is turned off.

When the power is turned off during the operation, the microcomputer 4 reads this signal and outputs an output for turning off the transistor 6d when the second pressure switch 5 is operated.

Embodiment 2 As shown in FIG. 2, the holding circuit 9 includes transistors 9a and 9b, resistors 9c and 9d, capacitors 9e and 9f, and a diode 9g. In this connection, the emitter of the transistor 9a is connected to the A-side terminal of the AC power supply 1, and the collector is connected to the resistor 9c. A capacitor 9e is connected between the base and the emitter, and a resistor 9d is connected to the base.

The other ends of the resistors 9c and 9d are connected to the base and the collector of the transistor 9b, respectively. This constitutes a positive feedback circuit. A capacitor 9f and a diode 9
g is connected to the anode, and the cathode is connected to the cathode of the diode 6b.

A DC rectified power supply of a capacitor 9f is connected to the emitter of the transistor 9b. The base of the transistor 6d and the base of 9a are connected. In addition, actually, a base resistor is connected to each base,
The description is omitted in this embodiment. The diode 10 has an anode connected to the base of the transistor 9a and a cathode connected to the output of the microcomputer 4. The transistor 11 has a base connected to the other output of the microcomputer 4, a collector connected to the anode of the diode 4, and an emitter connected to the insulation displacement switch 3 and the relay contact 2.
It is connected to the connection point a. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. When the pressure switch 3 is operated, the microcomputer 4 starts operating, and turns on the transistors 6d and 9a via the diode 10 from the output terminal. The relay contact 2a is closed by the transistor 6d. At the same time, transistor 9a
Is turned on, a current flows through the resistor 9c, and the transistor 9
b turns on. When the transistor 9b turns on, the resistor 9
A current flows through d, and further flows in a direction to turn on the transistor 9a. Therefore, even if there is no microcomputer output, the power can be kept on.

Although the microcomputer 4 itself has a small power supply current, it has many input / output terminals and its peripheral circuits, so that the current consumption increases, and when an instantaneous power failure of the AC power supply 1 occurs, The power supply voltage drops quickly, and a large capacitor capacity is required to ensure the withstand voltage against an instantaneous power failure.

According to the present embodiment, when an instantaneous power failure of the AC power supply 1 occurs during operation of the equipment, the microcomputer 4 can be put into the HALT mode, and the tolerance for instantaneous power failure can be greatly improved. To turn off the power, the microcomputer 4 outputs an output so that the transistor 11 is turned on. As a result, the voltage between the base and the emitter of the transistor 9a of the holding circuit 9 becomes 0, and the holding circuit 9 is released. The power turns off. The capacitor 9a prevents the holding circuit from malfunctioning due to noise.

(Embodiment 3) As shown in FIG. 3, the third pressure switch 12 has one end connected to the anode of the diode 6b and the other end connected to the base resistor 6e of the transistor 6d of the control circuit 6. I have. The microcomputer control function 13 connects the emitter of the transistor 13a to the contact 2a of the relay on the side opposite to the AC power supply 1, connects the resistor 13b to the base, and connects the other end of the transistor 13a to the third pressure switch 12 with the resistor. Connected to the connection point of the container 6e. A resistor 13c is connected to the collector, and the other end is connected to a negative power supply of the microcomputer. The data is input to the microcomputer 4 from the collector. A resistor 13d is connected from the microcomputer 4 and the other end is connected to the base of the transistor 6b.

The operation of the above configuration will be described. When the third pressure switch 12 is operated, the transistor 6d is turned on via the base resistor 6e. As a result, the relay contact 2a is closed, and the microcomputer 4 starts operating. When the third pressure switch 12 is turned on, the transistor 13a is turned on via the resistor 13b of the microcomputer control function 13, a current flows through the resistor 13c, and a microcomputer high voltage is generated at its collector. I do.

Thus, the microcomputer 4 recognizes that the third pressure switch 12 has been pressed, and outputs an output from the output terminal to the resistor 13d so that the transistor 6d is turned on. As a result, the relay contact 2a keeps on even if the third pressure switch 12 is opened. In this case, the transistor 6d may be turned on automatically via the resistor 13d when the relay is turned on without monitoring the collector voltage of the transistor 13a.

Next, when the third pressure switch 12 is operated again, the collector of the transistor 13a becomes high, and the microcomputer 4 recognizes this and outputs an output so that the transistor 6d is turned off. Thereby, the relay contact 2a is opened.

When a series of washing operations is completed by the microcomputer program in the power-on state, the microcomputer 4 turns off the transistor 6d via the resistor 13d and automatically turns off the power.

(Embodiment 4) As shown in FIG. 4, the voltage dividing circuit 14 has resistors 14a and 14b connected in series between the A-side terminal and the B-side terminal of the AC power supply 1. The second control circuit 15 includes a capacitor 15a, an anode and a cathode of a diode 15b between an A-side terminal and a B-side terminal of the AC power supply 1,
The configuration in which the resistor 15c is connected in this order allows the capacitor 15 to be connected.
A DC rectified voltage is generated at a, and a power supply for supplying power to the relay coil 2b is created.

The emitter of the transistor 15d is connected to the A side terminal of the AC power supply 1, the collector is connected to the relay coil 2b, and the other end is connected to the DC output of the capacitor 6a. A terminal of AC power supply 1 and resistor 14 of voltage dividing circuit
A capacitor 15f, an anode of a diode 15g, and a cathode are connected in this order between the connection points a and 14b.
The third pressure switch 12 is connected to the anode of the diode 15g, and the other contact is connected to the resistors 13b and 15d.
It is connected to the. The other end of the resistor 15e is connected to the base of the transistor 15d. Other configurations are the same as those of the third embodiment.

The above configuration will be described. Resistors 14a and 14b of the voltage dividing circuit 14 are provided at both ends of the capacitor 15f.
As a result, a DC voltage obtained by rectifying a voltage obtained by dividing the AC power supply voltage is generated. Other circuit operations by operating the third pressure switch 12 are the same as those in the third embodiment.

Since the transistors 15d and 13d are driven from the divided voltage of the AC power supply voltage by the third pressure switch 12, the voltage applied between the contacts of the third pressure switch 12 may be low. Becomes

Embodiment 5 As shown in FIG. 5, the capacitors 16 and 17 are connected in series between the A-side terminal and the B-side terminal of the AC power supply 1. Diode 15 from the connection point
g of cathode is connected. The other configuration is the same as in the fourth embodiment.
Is the same as

In the above configuration, a DC voltage obtained by rectifying a voltage obtained by dividing the AC power supply 1 by the capacitors 16 and 17 is obtained at both ends of the capacitor 15f. The following operation is the same as in the fourth embodiment.

In the fourth embodiment, since the divided voltage is obtained by dividing the voltage by the resistors 14a and 14b, power is consumed in the resistance voltage dividing circuit in the circuit which is the source for obtaining the DC rectified power. Are the capacitors 16, 17
, The effective power consumption can be reduced to zero.

(Embodiment 6) As shown in FIG.
8 is connected in parallel to the capacitor 16 among the capacitors 16 and 17 connected in series between the A-side terminal and the B-side terminal of the AC power supply 1. Other configurations are the same as those of the fifth embodiment.

In the above configuration, by connecting the resistor 18 in parallel with the capacitor 16, the capacitor 15f
DC rectified voltage and current can obtain high values. As a result, the selection of the constant of the resistor 15e is widened, and a wide selection range of the current amplification factor of the transistor 15d can be obtained, thereby facilitating the design.

(Embodiment 7) As shown in FIG. 7, the second switch 19 is constituted by a relay,
“a” includes a common terminal, an NC terminal, and a NO terminal. The switch control unit 19b is formed of a relay coil, and a contact connected to the common terminal when no coil current flows is an NC (normally closed) terminal, and a terminal connected to the common terminal when the coil current flows. NO (normally open)
Terminal. A common terminal is connected to the side of the AC power supply 1, and a press contact switch 3 is connected between the common terminal and the NO terminal.

The DC rectifier circuit 20 includes a capacitor 20a, an anode and a cathode of a diode 20b, and an NC terminal.
The resistor 20c and the B-side terminal of the AC power supply line are connected in this order. The DC power supply 21 supplies a current to the coil. Although not shown in the figure, the microcomputer 4 operates on a power supply different from the DC power supply 21 and can back up the microcomputer 4 for a long time in the event of an instantaneous power failure.

The switch control circuit 22 is composed of a transistor. The base is connected to the output of the microcomputer 4, the emitter is connected to the A side terminal of the AC power supply 1, and the collector is connected to the relay coil 19b. One of the other ends of the relay coil 19b is connected to a diode 2 through a resistor 23.
0b, and the other is connected via a diode 24 to the negative power supply of the DC power supply. Resistor 23 limits the relay coil current. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. A DC voltage obtained by rectifying the AC power supply 1 is generated in the capacitor 20a via the NC terminal. From this state, the insulation displacement switch 3
Is closed, the DC power supply 21 rises, power is supplied to the microcomputer 4 again, the signal from the ZVP circuit 7 is read, and the microcomputer 4 starts operating.

Subsequently, the transistor which is the switch control circuit 22 is turned on, and a current flows through the relay coil 19b using the capacitor 20a as a power supply. As a result, the relay contact 19a switches from the NC terminal to the NO terminal. Since the NC terminal is disconnected from the AC power supply 1, the capacitor 20
a is not supplied to the switch control circuit 22a, and the circuit is cut off, so that it cannot be used as a power supply for the switch control circuit 22. However, since the DC power supply 21 has already been started before the NC terminal is opened, the relay coil 19b is connected to Current is supplied from the DC power supply via the switch, and the switch control circuit 22 continues its operation even when the NC terminal is opened.

Next, the operation when the AC power supply 1 experiences an instantaneous power failure while performing the washing operation according to the program of the microcomputer 4 will be described. A momentary power failure causes the voltage of the DC power supply 21 supplying the relay coil current to drop, and the output of the microcomputer 4 causes the switch control circuit 22 to maintain the coil current while maintaining the relay coil driving state. When the relay contact switches from the NO terminal to the NC terminal, the DC rectifier circuit 20 is connected to the AC power supply 1.

When an instantaneous power failure ends from this state and the energization from the AC power supply 1 starts, a DC voltage is generated at the capacitor 20a, and the relay contact 19a is again turned NO from the NC terminal.
Switching to the terminal allows the microcomputer 4 to continue the washing operation. The second pressure switch 5 turns off the power. When the instantaneous power failure time is short, the terminal is not switched from the NO terminal to the NC terminal.

[0056]

As described above, according to the first aspect of the present invention, a switch disposed on an AC power supply line,
A pressure switch connected in parallel to the switch, a microcomputer that starts operating when the pressure switch is turned on, a second pressure switch connected to the microcomputer input terminal, and an AC power supply side from the pressure switch. And a control circuit for controlling a control terminal of the switch, wherein when the pressure contact switch is operated,
Since the microcomputer has the function of controlling the control circuit to turn on the switch and operating the second pressure switch to control the control terminal of the switch to turn off the switch, the capacitor has a small capacitance value. However, the withstand voltage against instantaneous power failure of the AC power supply can be increased.

According to the second aspect of the present invention, there are provided a switch arranged on an AC power supply line, a pressure switch connected in parallel to the switch, and a microcomputer which starts operation when the pressure switch is turned on. A second pressure switch connected to the microcomputer input terminal, a control circuit disposed on the AC power supply side of the pressure switch to control a control terminal of the switch, and a holding circuit, wherein the pressure switch is operated. When the microcomputer is turned on, the control circuit switches on the control circuit via a holding circuit, and when the second pressure switch is operated, the control terminal of the switch is controlled via the holding circuit to turn off the switch. Since it has a function, it is possible to further reduce It is possible to increase the instantaneous power failure immunity of the power supply.

According to the third aspect of the present invention, a switch disposed on the AC power supply line, a control circuit disposed on the AC power supply side of the switch to control a control terminal of the switch, A press-contact switch arranged at the input / output or a part thereof; a microcomputer which starts operating when the switch is turned on; and a microcomputer which reads a voltage in a circuit which changes when the press-contact switch is operated and reads the voltage of the switch. A microcomputer control function for controlling the control terminal, and a function for controlling the on / off of the switch by operating the pressure contact switch. Program operation can be reliably continued even if Power pressure switch for on-off was able to be one.

According to the fourth aspect of the present invention, a switch disposed on the AC power supply line, a control circuit disposed on the AC power supply side of the switch to control a control terminal of the switch, and A voltage dividing circuit for dividing the voltage, a pressure contact switch and a second control circuit disposed between the voltage dividing circuit and a switch control terminal, and a microcomputer which starts operating when the switch is turned on, when the pressure contact switch is operated. A microcomputer control function of controlling the control terminal of the switch by reading the voltage in the changing circuit, and having a function of controlling the on / off of the switch by operating the pressure switch. Can be further reduced, and the component size can be reduced and the price can be reduced.

According to the fifth aspect of the present invention, a switch disposed on the AC power supply line, a control circuit disposed on the AC power supply side of the switch for controlling a control terminal of the switch, A pressure connection switch and a second control circuit disposed between one output of the capacitor and a switch control terminal;
A microcomputer control function of reading a voltage in a circuit that changes when the press-contact switch is operated by the microcomputer that starts operating when the switch is turned on and controlling a control terminal of the switch; The power consumption (active power) for driving the switch can be reduced by obtaining the divided voltage from the capacitor, since the switch has a function of controlling the on / off of the switch by operating the switch. In addition to the effects, the standby power when the power is turned off can be reduced to zero.

According to the sixth aspect of the present invention, by connecting a resistor in parallel with one of the capacitors, the output obtained from the capacitor is increased, thereby reducing the capacitance value of the capacitor. In addition, by increasing the output, the selection range of the resistor for driving the relay and the current amplification factor of the transistor can be widened,
The ease of design can be improved.

According to the present invention, the second switch having one contact and two contacts arranged on the AC power supply line, and the pressure contact switch connected in parallel to the common terminal and the NO terminal of the second switch. A microcomputer and a DC power supply that start operating when the insulation displacement switch is turned on,
A second pressure contact switch connected to the microcomputer input terminal, a switch control circuit connected to the microcomputer output for controlling the control unit of the switch, and a DC rectifier circuit for rectifying an AC power supply via the NC terminal of the switch And a second switch is driven by a switch control circuit using the DC rectifier circuit as a power source by a microcomputer output when the pressure contact switch is operated,
When the second switch is driven, the power supply to the switch control circuit is switched from the DC rectifier circuit to the DC power supply, and when the second press-contact switch is operated, the switch control circuit is controlled by the microcomputer output to control the switch. 2 has a function of turning off the switch, so as to increase the instantaneous power failure tolerance of the AC power supply while reducing the capacity of the capacitor, as in the case of the first aspect,
The program operation can be reliably continued. Also,
When the switch is turned on, the relay coil current is obtained from a low-voltage DC power supply.When using a DC rectified voltage for the relay coil from an AC power supply, there is power loss due to the resistance in the rectifier circuit. On the other hand, power loss can be reduced. Further, since the time during which the current flows through the resistor in the DC rectifier circuit formed from the AC power supply or the limiting resistor of the relay coil current is short, it is possible to reduce the heat generated in these resistors.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a control device of a washing machine or the like according to a first embodiment of the present invention, which is partially formed as a block.

FIG. 2 is a circuit diagram in which a control device of a washing machine or the like according to a second embodiment of the present invention is partially block-formed;

FIG. 3 is a partially block diagram of a control device for a washing machine or the like according to a third embodiment of the present invention.

FIG. 4 is a circuit diagram of a control device for a washing machine or the like according to a fourth embodiment of the present invention, which is a partially block diagram;

FIG. 5 is a circuit diagram in which a control device of a washing machine or the like according to a fifth embodiment of the present invention is partially blocked;

FIG. 6 is a partially block diagram of a control device for a washing machine or the like according to a sixth embodiment of the present invention.

FIG. 7 is a circuit diagram in which a control device of a washing machine or the like according to a seventh embodiment of the present invention is partially blocked;

FIG. 8 is a circuit diagram in which a conventional control device of a washing machine or the like is partly blocked.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 AC power supply 2 a Relay contact (switch) 3 Pressure switch 4 Microcomputer 5 Second pressure switch 6 Control circuit

Claims (7)

[Claims] A switch disposed on an AC power supply line;
A pressure switch connected in parallel to the switch, a microcomputer that starts operating when the pressure switch is turned on, a second pressure switch connected to the microcomputer input terminal, and an AC power supply side from the pressure switch. And a control circuit for controlling a control terminal of the switch, wherein when the pressure contact switch is operated,
A control device for a washing machine or the like having a function of turning on a switch by controlling the control circuit by the microcomputer and operating a second pressure contact switch to control a control terminal of the switch to turn off the switch. 2. A switch arranged on an AC power supply line,
A pressure switch connected in parallel to the switch, a microcomputer that starts operating when the pressure switch is turned on, a second pressure switch connected to the microcomputer input terminal, and an AC power supply side from the pressure switch. A control circuit arranged and controlling a control terminal of the switch; and a holding circuit, wherein when the press-contact switch is operated, the microcomputer turns on the control circuit via the holding circuit, and the second A control device such as a washing machine having a control function of controlling a control terminal of the switch via a holding circuit to turn off the switch when the pressure contact switch is operated. 3. A switch arranged on an AC power supply line,
A control circuit disposed on the AC power supply side of the switch to control a control terminal of the switch; a pressure contact switch disposed at an input / output of the control circuit or a part thereof; and a microcomputer which starts operating when the switch is turned on And a microcomputer control function for controlling the control terminal of the switch by reading the voltage in the circuit that changes when the pressure switch is operated, and controlling the on / off of the switch by operating the pressure switch. A control device such as a washing machine having the function of performing 4. A switch arranged on an AC power supply line,
A control circuit disposed on the AC power supply side of the switch to control a control terminal of the switch; a voltage dividing circuit for dividing the AC power supply voltage; a pressure contact switch disposed between the voltage dividing circuit and the switch control terminal; A control circuit for controlling the control terminal of the switch by reading the voltage in the circuit that changes when the pressure switch is operated by the microcomputer that starts operating when the switch is turned on. And a control device for a washing machine or the like having a function of controlling on / off of the switch by operating the pressure switch. 5. A switch disposed on an AC power supply line,
A control circuit disposed on the AC power supply side of the switch to control a control terminal of the switch; a capacitor connected in series between the AC power supply lines; and a pressure contact switch disposed between one output of the capacitor and a switch control terminal. A second control circuit, and a microcomputer which starts operation when the switch is turned on, a microcomputer which reads a voltage in the circuit which changes when the press-contact switch is operated, and controls a control terminal of the switch. A control device, such as a washing machine, having a control function and having a function of controlling on / off of the switch by operating the pressure contact switch. 6. The control device according to claim 5, wherein a resistor is connected in parallel to one of the capacitors. 7. A one-circuit, two-contact second switch disposed on an AC power supply line, and a common terminal of the second switch and N
A pressure switch connected in parallel to the O terminal, a microcomputer and a DC power supply that start operating when the pressure switch is turned on, a second pressure switch connected to a microcomputer input terminal, A switch control circuit for controlling a control section of the switch; and a DC rectifier circuit for rectifying an AC power supply via an NC terminal of the switch. When the press-contact switch is operated, the DC rectifier circuit is used as a power supply by a microcomputer output. When the second switch is driven by the switch control circuit, and when the second switch is driven, the power supply to the switch control circuit is switched from the DC rectification circuit to the DC power supply, and when the second pressure switch is operated, The switch control circuit is controlled by the microcomputer output to Control device for a washing machine or the like having a function of turning off the switch.