JP2001297674A - Control device for washing machine or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce voltage and current ratings for a pressure contact switch, and to provide a smaller shape, reduced cost for parts, simplied mounting on a printed board and assembly, simplified constitution inside equipment, and a reduced number of assembling man-hous by using minute electric power obtained by a capacitor. SOLUTION: This control device comprises a first capacitor 2 and a second capacitor 3 connected, in series between lines of an AC power supply 1 in equipment, with a relay contact 4a being arranged in the line of the AC power supply 1 is controlled to be turned on/off by driving a relay coil 4b via a control circuit 6. The pressure contact switch 8 is arranged between the first capacitor 2 and a control circuit 6. A voltage in the circuit changed with the operation of he pressure contact switch 8, is inputted to a microcomputer 9, whose operation is started when a relay contact 4a is closed, and an output circuit 11 is connected to a microcomputer output which provides an output for controlling the drive of the relay coil 4b, to cause the relay coil 4b to drive. The control device has a function of controlling the relay contact 4a to be turned on/off by the pressure contact switch 8.

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 to a device from an AC power supply.

[0002]

2. Description of the Related Art Conventionally, the supply and cutoff of electric power to equipment can be roughly classified into two types: one for opening and closing an AC power supply line by manually operating a control terminal of a switch disposed on an AC power supply line; There is a type in which a relay contact disposed on a line controls a coil, which is a control unit, through a control circuit by another manual switch to open and close a power supply line.

The latter is substantially composed of two switches. In the former, in modern times, switches used for washing machines, dishwashers, dryers, etc.
Since it is desired that the power is automatically turned off after a series of operations targeted by the device, the former switch is further provided with mechanical contacts using electric force by a solenoid to open the contacts. In many cases, a device having an opening function is employed. In the present invention, the power switch refers to a manually operated switch.

[0004] Specifically, as a first conventional example, FIG.
As shown in FIG.
In some cases, the contacts are manually short-circuited or opened, thereby supplying power to the electronic circuit of the device and the load 7.

[0005] As a second conventional example, there is a switch (hereinafter, referred to as a composite switch) having a function of enabling only an electrical off by a solenoid. As shown in FIG. 27, the power switch is manually turned on by a switch 57 arranged on the AC power supply line, and then the work such as washing is performed according to the microcomputer program. When this is completed, the solenoid 54a is output by the output of the microcomputer 7a. To open the contact of the switch 57 to cut off the power supply. The resistor 52 and the transistor 53 are a solenoid drive circuit, the resistor 55 is a current limiting resistor, and 56 is a DC power supply for obtaining a solenoid drive current created from the AC power supply 1.

In this figure, a switch 57 can be manually turned off when it is desired to turn off the power once the power switch is turned on.

As a third conventional example, as shown in FIG. 28, a press-contact switch 58 disposed on an AC power supply line is used.
(This is a type of switch in which the state of the contact changes only while the operating force is applied, and returns to the original state when the operating force is removed.)
The microcomputer reads a signal from a circuit (referred to as a zero volt pulse circuit) 7b for detecting a zero crossing of the AC power supply voltage, recognizes that power is being supplied to the device, and connects the resistor 52 from the output terminal. The transistor 53 is turned on via the switch 53, and the coil 59b of the relay 59 is driven to connect the contact 59 connected in parallel with the pressure switch.
The operation is performed such that power is continuously supplied to the device even after the a is closed and the pressure switch 58 is opened.

Thereafter, when a series of washing operations are completed in accordance with the microcomputer program, the transistor 53 is turned off by the microcomputer output, the relay contact 59a is opened, and the power supply to the device is stopped. The manual power-off is performed by operating another press-contact switch 60, and the microcomputer reads this to turn off the relay.

As a fourth conventional example, as shown in FIG. 29, an electronic circuit 6 including a microcomputer 61a is provided.
1, a microcomputer 61a in an electronic circuit is kept in an operating state by constantly supplying power, and a contact switch 60 provided in the device (the state of the contact changes only when pressed, and returns to the original state when released). Is operated by the microcomputer, the transistor 53 is driven by the output thereof, and a current flows through the coil 59b of the relay 59, so that the contact 59a of the relay arranged on the AC power supply line is connected. The short circuit causes power to be supplied to the electronic circuit and the load 62 other than the microcomputer, thereby supplying power to the entire device.

A display device and the like in other electronic circuits are simultaneously turned on. When the operation of a series of devices is completed, the relay is turned off by the microcomputer output, and the power supply to the electronic circuit and the load 62 other than the microcomputer is cut off. In the manual power-off, the microcomputer reads the same and presses the same pressure switch 60 again to turn off the power. The power supply is repeatedly turned on and off each time the press-contact switch is pressed. This is an apparent power switch, and in fact, a part of the device is always energized.

[0011]

However, in such a conventional configuration, according to the first and second conventional examples, the power switch is disposed on the AC power supply line, so that a high voltage is applied or a load is applied. When a large current flows by supplying a current to the switch, a switch (contact) having a large voltage and current rating is required, and a switch having a large shape is required. Further, according to the second conventional example, the switch is electrically turned off. Since the solenoid is provided for setting the state, the size of the solenoid becomes larger, and therefore, the component price becomes higher.

[0012] Further, when mounting on a printed circuit board for the purpose of simplifying the internal structure of the device and assembling easiness, a large space is required, and the printed circuit board may be cracked due to the weight of the parts. However, there is no effect of mounting on a printed circuit board, and mounting on a printed circuit board is unrealistic.

Therefore, conventionally, circuit connection has been made by aerial wiring using a lead wire and a connector. Therefore, there are problems such as an increase in the number of parts, an increase in wiring, the complexity of assembly due to this, an increase in the number of assembling steps, and a high possibility of failure due to the complexity of the internal configuration of the device.

According to the third conventional example, as in the case of the switch of the first conventional example, the press-contact switch is arranged on an AC power supply line or the like, so that high voltage application and inrush current when the power is turned on can be reduced. A large current rating is required to withstand, etc., so the shape is large, the price is also expensive, and when mounted on a printed circuit board, the occupied area increases and a large current flows, so the foil needs to be thick. There was such a problem. Further, since the power supply is turned on and off by another switch, there is a problem that there are two switches.

According to the fourth conventional example, it is possible to use a switch having a small voltage and current rating as the press-contact switch. However, since the electronic circuit is always energized, the apparent power switch is turned off. However, there is a problem that the power consumption is constant (hereinafter, referred to as standby power consumption).

The present invention solves the above-mentioned conventional problems, and reduces the voltage and current ratings of the press-contact switch by using the small power obtained from the capacitor, thereby reducing the size of the press-contact switch, lowering the cost of parts, and reducing the cost of printed circuit boards. Easier mounting, assembly, simplification of internal configuration of equipment, reduction of assembly man-hours, elimination of aerial wiring due to elimination of lead wires or connectors, and reduction of defects due to these, zero or minimal standby power It is intended to be.

[0017]

According to the present invention, in order to achieve the above object, a capacitor is connected in series between AC power supply lines in a device, and a relay coil is driven by a control circuit to be arranged on the AC power supply line. Controls the on / off of the relay contact, places a pressure switch between one of the capacitors and the control circuit, and inputs the voltage in the circuit that changes by operating the pressure switch to the microcomputer that starts operating when the relay contact closes. A microcomputer configured to drive the relay coil by connecting an output circuit to a microcomputer output that outputs an output that controls the driving of the relay coil by reading the input circuit voltage, and has a function of controlling the on / off of the relay contact by a pressure switch. It is.

By using the small amount of electric power obtained from the capacitor, the voltage and current ratings of the insulation displacement switch can be reduced, the size can be reduced, the cost of parts can be reduced, and mounting on a printed circuit board and assembly can be performed. Simplification, simplification of the internal configuration of equipment, reduction of assembly man-hours, abolition of aerial wiring by eliminating lead wires or connectors, and reduction of defects due to these can be realized, and standby power is reduced to zero or minimum. Can be.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a capacitor connected in series between AC power supply lines in a device, a relay contact disposed on the AC power supply line, and one end of the capacitor. A DC rectifier circuit obtained from
A control circuit that drives a relay coil to control the on / off of a relay contact; a second DC rectifier circuit arranged between an AC power supply and created for supplying current to the relay coil; one of the capacitors and the control circuit A pressure switch disposed between the microcomputer, a microcomputer that starts operating when the relay contact is closed, an input circuit for inputting a voltage in a circuit that changes by operation of the pressure switch to the microcomputer, and reading the input circuit voltage. An output circuit connected to a microcomputer output for outputting an output for controlling the driving of the relay coil and driving the relay coil, and having a function of controlling the on / off of the relay contact by the press-contact switch, which is obtained from a capacitor. Reduce the voltage and current rating of the insulation displacement switch by using The size and shape can be made smaller, reducing the cost of parts, mounting on printed circuit boards, simplifying assembly, simplifying the internal configuration of equipment, reducing the number of assembly steps, eliminating aerial wiring by eliminating lead wires or connectors, It is possible to realize the reduction of defects due to these factors, and to reduce the standby power to zero or to a minimum.

According to a second aspect of the present invention, in the first aspect of the present invention, a resistor is connected to one end of the capacitor, and a high DC rectifier circuit output voltage and current can be obtained. The capacitance of the first and second capacitors can be reduced, the degree of freedom in the capacitance ratio can be improved, and the current amplification factors of the transistors in the control circuit and the input circuit can be reduced. Can be widened, and the design value of the base resistance can be improved.

According to a third aspect of the present invention, in the first aspect of the present invention, a diode is connected to one end of the capacitor in a direction in which a DC rectifier circuit output voltage is generated. A higher voltage and current can be obtained as compared with the second aspect of the present invention.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a resistor is connected in parallel with the diode, and the values of the first capacitor and the second capacitor are not continuous. Although the output voltage cannot be fine-tuned because it takes discrete values, the output voltage can be adjusted by connecting a resistor in parallel, so that the voltage rating of the insulation displacement switch or capacitor is not exceeded. As a result, it is possible to reduce the component rating and downsize the component.

According to a fifth aspect of the present invention, in the third aspect of the present invention, a resistor is connected in series with the diode, and the output voltage is adjusted in the same manner as in the fourth aspect of the present invention. The voltage rating of the insulation displacement switch or capacitor can be prevented from being exceeded, thereby reducing the component rating and miniaturizing the component, and improving the design flexibility. It is also possible to improve the ease of designing such as the arrangement of components in the board design.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a constant voltage diode is connected to one end of the capacitor in a direction in which the output voltage of the DC rectifier circuit is stabilized. In addition to the effect of the third aspect of the present invention, the output voltage of the DC rectifier circuit can be limited to a certain value or less by the constant voltage operation. It is possible to more stably guarantee the voltage rating of the insulation displacement switch (even against fluctuations in the AC power supply voltage, etc.). That is, the effects of the inventions of claims 4 and 5 can be further enhanced.

According to a seventh aspect of the present invention, in the first aspect, a resistor and a constant voltage diode are connected in series at one end of the capacitor, and a DC rectifier circuit is connected at both ends of the constant voltage diode. The diode can be prevented from being destroyed by external noise (lightning surge or other noise) that enters from the AC power supply, and a constant voltage diode with a small current rating can be used. And lower prices can be realized.

The invention described in claim 8 is the above-mentioned claim 1-
7. In the invention described in 7, the pressure contact switch is arranged at one output of the capacitor. The active power can be reduced to 0 when the power is turned off while using the small signal switch. For external noise, the circuit is disconnected except when the pressure switch is operated, so that the noise does not invade, the chance of damage to the component due to the external noise is reduced, and the reliability of the circuit quality is improved. Life can be extended.

According to a ninth aspect of the present invention, in the first aspect of the present invention, a pressure contact switch is disposed before a capacitor for obtaining a DC voltage of the DC rectifier circuit, and the capacitor is a control circuit and an input circuit. , It is possible to prevent malfunction of the control circuit and the input circuit due to external noise. That is, the capacitor
One capacitor serves two functions, that is, the function of a DC rectifying capacitor and the function of preventing malfunction due to external noise.

The invention according to claim 10 is the first invention.
In the invention described in the above, the pressure contact switch is disposed after the capacitor for obtaining the DC voltage of the DC rectifier circuit,
Since the DC rectifying capacitor is constantly charged, when the pressure contact switch is operated, the invention according to claims 8 and 9 requires the capacitor charging time, so that the relay driving or signal input to the microcomputer is required. If a time delay occurs, the operation can be performed without a time delay.

[0029] The invention described in claim 11 is the first invention.
In the invention described in (1), the DC rectifier circuit is formed by connecting a capacitor, a resistor, and a diode in series, and the output is obtained from the capacitor. for,
Reliability can be ensured while using a diode with a small rating.

The twelfth aspect of the present invention is the first aspect of the present invention.
In the inventions described in (10) to (10), the control circuit and the input circuit are configured as FETs, and the active elements of the control circuit and the input circuit are FETs. Since the voltage of the capacitor hardly drops when the pressure switch is closed, the power supply from the capacitor can be reduced, and the capacitance value of the capacitor can be reduced. As a result, the size of the component can be reduced.

[0031] The invention described in claim 13 is the above-described claim 1.
In the invention described in the above, the control circuit and the input circuit are configured as a transistor, and a resistor is connected to the base.The transistor is protected by a base resistor against external noise from an AC power supply, 13. The FET according to claim 12, wherein the input impedance is low and the combination with the base resistance is used.
Compared with the configuration, a configuration that is more resistant to external noise can be provided.

[0032] The invention described in claim 14 is the first invention.
In the invention described in the above, the output circuit configuration is configured such that a resistor is connected from the output terminal of the microcomputer, and the other end is connected to the base of the transistor of the control circuit according to the invention. The control circuit can be shared for the control from the pressure contact switch and the control from the microcomputer.

[0033] The invention according to claim 15 provides the above-mentioned claim 1.
Wherein the input terminal of the pressure switch is connected to the AD input of the microcomputer, and a voltage change is detected inside the microcomputer using the AD input of the microcomputer. By doing so, it is possible to reduce the number of components of the input circuit, and to realize only by circuit connection, thereby reducing the number of components. When the voltage of the capacitor, which is the DC rectifier circuit voltage when the pressure switch is closed, exceeds the input voltage rating of the microcomputer, the voltage can be adjusted so as not to exceed the rating by resistance division. It can also be realized by setting the operating voltage of the constant voltage diode to a value that does not exceed the input voltage rating of the microcomputer in combination with the inventions described in 6 and 7.

According to a sixteenth aspect of the present invention, in the first aspect,
In the invention described in (1), the output terminal of the insulation displacement switch is input to the transistor via a resistor, the emitter terminal of the transistor is connected to the minus power supply of the microcomputer, and the other end connected to the resistor from the collector is connected to the other power supply of the microcomputer. The input circuit is connected to the microcomputer and the collector output is input to the microcomputer. Even if the DC rectifier circuit voltage generated in the capacitor exceeds the microcomputer input voltage rating, the microcomputer input is connected to the microcomputer input terminal. A high or low signal within the voltage rating can be input, so that the design flexibility of the first capacitor and the second capacitor is increased, and the reliability of the AC power supply voltage fluctuation is increased. Circuit with a high level can be realized.

According to the seventeenth aspect of the present invention, in the first aspect,
In the invention described in (1), a constant voltage diode is connected from the output terminal of the press-contact switch, and an input circuit for inputting a voltage obtained from both ends to the microcomputer is used. It can be realized, and the number of parts can be reduced.

[0036] The invention described in claim 18 is the first invention.
The invention according to claim 17, wherein a resistor and a constant voltage diode are connected from the output terminal of the pressure contact switch, and an input circuit for inputting a voltage obtained from both ends to a microcomputer is provided. Can be obtained, and the reliability of the constant voltage diode against destruction due to external noise can be improved.

According to a nineteenth aspect of the present invention, a capacitor connected in series between AC power supply lines in a device, a relay contact disposed on the AC power supply line, and a DC rectifier circuit output obtained from one end of the capacitor. A control circuit for driving a relay coil, a second DC rectifier circuit arranged between an AC power supply for current supply to the relay coil, and a press-contact switch arranged between one of the capacitors and the control circuit A microcomputer that starts operating when the relay contact is closed, a second input circuit that inputs a current in the circuit that changes by the operation of the pressure contact switch to the microcomputer through a photocoupler, and reads the input circuit voltage. A second output circuit for controlling a relay coil using a second output photocoupler from the microcomputer output, It has a function of controlling the on / off of the relay contact by a contact switch, and a circuit in which the voltage of the microcomputer power supply does not match the voltage of the AC power supply line, that is, when the microcomputer is present in a secondary circuit insulated from the AC power supply, or The control device of the present invention can be realized in a circuit in which a microcomputer is present in an electronic circuit obtained by full-wave rectifying an AC power supply.

The twentieth aspect of the present invention is the first aspect of the present invention.
In the invention according to the ninth aspect, the power supply of the phototransistor of the photocoupler that drives the relay coil is obtained from the divided voltage of the second DC rectifier circuit. The voltage rating of the phototransistor of the photocoupler can be reduced, and the cost of parts can be reduced.

According to a twenty-first aspect of the present invention, the first aspect is provided.
In the inventions described in any one of claims 20 to 20, the constants are used to realize a measure against noise terminals of the device by a capacitor connected in series to the AC power supply. When two capacitors are required, switch control power can be supplied while limiting the noise terminal voltage to within a predetermined value by using two capacitors.

[0040] The invention of claim 22 provides the above-mentioned claim 1.
In the inventions described in any one of claims to 20, the capacitor connected in series to the AC power supply is used as a constant for preventing malfunction and destruction of the device due to external noise, and a capacitor required for countermeasures against external noise and two capacitors for switch control. Is required, the two capacitors can protect the device from malfunction and destruction of the circuit due to external noise, and supply power for switch control.

According to the twenty-third aspect of the present invention, the first aspect is provided.
In the inventions described in any one of (1) to (22), the capacity ratio is such that a small signal press-contact switch can be employed by a capacitor connected in series to an AC power supply. A reduction in size and a reduction in price can be realized.

The invention according to claim 24 is the first invention.
In the inventions described in any one of claims 23 to 23, a capacitor connected in series to an AC power supply is used as a countermeasure against noise terminals of the device, a countermeasure against external noise, and a constant and a capacity ratio that enable use of a small signal pressure switch. It can be used for equipment noise terminal countermeasure, external noise countermeasure, and small signal pressure welding switch.

The twenty-fifth aspect of the present invention is the second aspect of the present invention.
0, the power supply of the phototransistor of the photocoupler that drives the relay coil is configured to take power from the output of the DC rectifier circuit, and the voltage rating of the phototransistor of the photocoupler can be reduced.
The component price can be reduced, and a power on / off system with even smaller power loss can be realized.

[0044]

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 first capacitor (capacitor) 2 and a second capacitor (capacitor) 3 connected in series between lines. One end of the first capacitor 2 is connected to the A side terminal of one line, and one end of the second capacitor 3 is connected to the B side terminal of the AC power supply. The relay 4 includes a relay contact 4a arranged on the B-side line of the AC power supply 1, and a relay coil 4b serving as a switch control unit.

The DC rectifier circuit 5 is connected to both ends of the first capacitor 2 in order from the connection point of the first capacitor 2 and the second capacitor 3 to the cathode of the diode 5b, the anode, and the capacitor 5a. The control circuit 6 controls the opening and closing of the relay contact 4a by driving the relay coil 4b.
b, and a resistor 6c for limiting the coil current to within a rated value.
It consists of:

As for the connection, the other end of the resistor 6c connected to the relay coil 4b is connected to the collector of the transistor 6a, the base is connected to the resistor 6b, and the emitter is connected to the A side terminal of the AC power supply. . The control circuit 6 can be constituted by a current amplifier circuit or a voltage amplifier circuit,
The element can be realized by a transistor, an FET, a photocoupler, or the like. In this embodiment, an example of a current amplifier circuit using a transistor is shown.

The second DC rectifier circuit 7 is connected to the B
The resistor 7c, the anode of the diode 7b, the cathode, and the capacitor 7a are connected in this order from the side terminal to the A side terminal, and the other end of the current limiting resistor 4c of the relay coil 4b is connected to the connection point between the diode 7b and the capacitor 7a. are doing. The pressure switch 8 is connected to the capacitor 5 of the DC rectifier circuit 5.
a and the connection point of the diode 5b and the resistor 6 of the control circuit 6.
b is connected to the other end. Thereafter, the resistor 6 of the control circuit 6
The other end of b is referred to as the output contact of the pressure switch.

In the present invention, the pressure contact switch 8 is a type of switch in which the state of the contact changes only while a manual operating force is applied, and the contact returns to the original state when the operating force is removed. I do. It is assumed that the microcomputer 9 has a negative power supply common to the A-side terminal of the AC power supply 1, and is supplied with power when the relay contact 4a is closed to start operation.

There are several input circuits 10 such as a voltage place to be taken out and a circuit system. In this embodiment, the resistor 10b and the emitter of the transistor 10a are connected to the A side terminal of the AC power supply 1, and the base is connected to the base. The other end of the resistor 10b and 1
0c is connected. A resistor 10d is connected to the collector, and the other end is connected to the power supply of the microcomputer 9. The collector of the transistor 10a is input to the microcomputer 9. The other end of the resistor 10c is connected to a connection point between the insulation displacement switch 8 and the resistor 6b.

The output circuit 11 is a microcomputer 9
The control circuit controls the control terminal of the relay 4 by reading the input circuit voltage to the relay. In this embodiment, the control terminal is configured by a resistor 11a. The output of the microcomputer 9 is connected to the base of the transistor 6a. The control circuit is shared. The control circuit 6 can be configured by an FET, a photocoupler, a transistor, and the like.

Reference numeral 12 denotes an electronic circuit of a device including a microcomputer and other loads. Here, the load is a motor,
Solenoids, relays, plungers, valves (water supply valves, drain valves), other things that mechanically operate with electric energy, and things that change the physical quantity using electric energy (heater).

The operation of the above configuration will be described. An AC voltage obtained by dividing the AC power supply 1 with the second capacitor 3 is generated in the first capacitor 2, and the divided voltage is divided by the capacitor 5 a of the DC rectifier circuit 5 and the capacitor 5 b by the DC rectifier circuit of the diode 5 b. DC voltage is generated at both ends of the.

On the other hand, the DC voltage obtained by rectifying the AC power supply voltage is converted into a capacitor 7a by the capacitor 7a and the diode 7b of the second DC rectifier circuit 7 and the rectifier circuit of the resistor 7c.
When the pressure switch 8 is operated, the base current is supplied to the transistor 6a via the base resistor 6b, so that the transistor 6a is turned on, the collector current flows, and the current is limited by the resistor 6c. A current flows through the coil and the relay contact 4a closes.

As a result, the microcomputer 9 starts operating. Further, since the output side contact of the pressure switch 8 is also connected to the transistor 10a of the input circuit 10 via the resistor 10c, the transistor 10a is also turned on and its collector output becomes low. Microcomputer 9
Reads this signal and outputs an output to turn on the transistor 6a to the output circuit 11 via the resistor 11a, so that the relay contact 4a is kept on even when the operating force of the pressure switch 8 is removed.

Here, in this embodiment, the input circuit 1
The microcomputer 9 recognizes that the pressure switch 8 has been pressed by 0, and controls the output circuit 11.
As the microcomputer software that holds the switch by the output circuit 11, a method of recognizing that the zero volt voltage of the AC power supply 1 has entered and judging that the insulation displacement switch 8 has been pressed, or when the power supply starts up There are various ways to hold the switch unconditionally.

When the pressure switch 8 is opened and then operated again, the microcomputer 9 recognizes the input voltage from the input circuit 10 and the transistor 6a
Is output to the output circuit 11 so as to be turned off. Thus, when the relay contact 4a is opened, the power supply to the device is stopped.

After the power is turned on, the microcomputer 9
When the washing operation is completed based on a sequence programmed in advance, the microcomputer 9 automatically turns off the relay contact 4a.

(Embodiment 2) As shown in FIG.
Are connected in parallel to the first capacitor 2. Other configurations are the same as those in the first embodiment.

In the above configuration, when the resistance value of the resistor 13 is set to an appropriate value, the DC rectifier circuit output voltage of the capacitor 5a can obtain a higher voltage and a higher current than when the resistor 13 is not provided. As a result, the driving of the transistor 6a or 10a becomes easier, and the washing range of the current amplification factor is widened (it can be used even if it is small).
Of the capacitor 2 and the second capacitor 3 can be reduced.

In this embodiment, there is a resistance value which can take the highest voltage and current, and the output voltage and current decrease as the resistance value becomes higher or lower.

(Embodiment 3) As shown in FIG. 3, the diode 14 is connected to both ends of the first capacitor 2 such that the anode is the A-side terminal of the AC power supply. Other configurations are the same as those in the first embodiment.

In the above configuration, when a forward current flows through the diode 14, the voltage is about 0.6 V. Considering that this voltage is almost zero, the voltage of the AC power supply 1 becomes zero during the next half cycle. By applying the voltage divided by the first capacitor 2 and the second capacitor 3 to the second capacitor 2, a higher voltage and current are obtained in the capacitor 5 a of the DC rectifier circuit 5 than in the second embodiment. As a result, the capacity of the first capacitor 2 and the second capacitor 3 can be reduced, and the selection range of the transistor current gain can be further expanded.

(Embodiment 4) As shown in FIG.
Are connected in parallel with the diode 14. Other configurations are the same as those of the third embodiment.

In the above arrangement, the component constants of the first capacitor 2, the second capacitor 3 and the resistor are usually manufactured as discrete values by a manufacturer. Therefore, when only the diode 14 is used, the direct current generated in the capacitor 5a is generated. The voltage obtained from the output of the rectifier circuit may exceed the voltage rating of the pressure switch 8.

In this embodiment, the voltage can be adjusted so as not to exceed the voltage rating of the press-contact switch 8 by adjusting the voltage by the resistor 15 in the direction of decreasing the voltage. The same adjustment can be made for the voltage rating of the capacitor 5a.

(Embodiment 5) As shown in FIG.
And the diode 14 are connected in series to both ends of the second capacitor 2. Other configurations are the same as those in the first embodiment.

In the above configuration, the present embodiment provides another configuration of the fourth embodiment, and can be selectively implemented in circuit design while obtaining the same effects as the fourth embodiment. The degree of freedom in designing the arrangement of components such as the resistor 13 and the diode 14 on the printed circuit board can be improved.

(Embodiment 6) As shown in FIG. 6, the constant voltage diode 16 is connected in parallel to the second capacitor 2, and the anode is connected to the A-side terminal of the AC power supply.
Other configurations are the same as those in the first embodiment.

In the above configuration, when the capacitor 5a is in the non-charging AC power supply voltage, similar to the third embodiment,
The voltage of the second capacitor 2 is substantially 0, and the capacitor 5a is charged by the constant voltage diode 16 while the DC rectified voltage of the capacitor 5a is limited by the constant voltage diode 16 during charging. Thus, the voltage rating of the pressure switch 8 and the voltage rating of the capacitor 5a can be limited.
A more stable voltage can be obtained, and design easiness can be further ensured.

(Embodiment 7) As shown in FIG.
Is connected to the connection point between the first capacitor 2 and the second capacitor 3 and the cathode of the constant voltage diode 16, and from this point is connected to the anode of the diode 5b of the DC rectifier circuit 5. Other configurations are the same as those of the sixth embodiment.

In the above configuration, against the intrusion of external noise including lightning surge and the like from the AC power supply 1, the constant-voltage diode 16 is set to a small rating, while preventing destruction by external noise and improving reliability. The same effect as in the sixth embodiment can be obtained.

(Embodiment 8) As shown in FIG. 8, the press contact switch 8 is connected to the connection point between the first capacitor 2 and the second capacitor 3 and its output terminal is connected to the resistor 17. . Other configurations are the same as those of the seventh embodiment.

In the above configuration, external noise is applied to components other than the first capacitor 2 and the second capacitor 3 only when the contact of the pressure switch 8 is closed. Since the number is smaller than 1 to 7, the probability of damage to components due to external noise is reduced, and the reliability of the circuit can be improved. further,
Since only the first capacitor 2 and the second capacitor 3 are connected to the AC power supply 1, the effective power consumption can be reduced to 0 when the pressure switch 8 is turned off.

(Embodiment 9) As shown in FIG. 9, the press-contact switch 8 has a configuration arranged before the DC rectifier circuit 5, and is arranged between the diode 5b and the capacitor 5a. Other configurations are the same as those of the seventh embodiment.

In the above configuration, the transistors 6a, 1
0a indicates that in the case of the first embodiment, a malfunction occurs due to noise unless a capacitor is arranged between the base and the emitter in an actual circuit against external noise in the actual circuit. However, the press-contact switch 8 is arranged between the diode 5b and the capacitor 5a. By doing so, this can be shared by the DC rectifier circuit capacitor, and the number of components can be reduced.

(Embodiment 10) As shown in FIG. 10, the press contact switch 8 is connected after the capacitor 5a of the DC rectifier circuit 5. Other configurations are the same as in the eighth embodiment.

In the above configuration, when the position of the pressure switch 8 is set to the position of the eighth and ninth embodiments,
Is operated, it takes time to charge the capacitor 5a, so that the turning on of the transistors 6a and 10a is delayed,
That is, there is a problem that the circuit response speed is slow. With the arrangement of the present embodiment, a response delay can be eliminated.

(Embodiment 11) As shown in FIG. 11, a resistor 5c is arranged between a diode 5b and a capacitor 5a of a DC rectifier circuit 5, and a press contact switch 8 is connected to a connection point between the resistor 5c and the capacitor 5a. I have. Other configurations are the same as those in the first embodiment.

In the above configuration, the diode 5b and the components following it can be protected from external noise that enters from the AC power supply 1, and components with a small rating can be used.

(Embodiment 12) As shown in FIG. 12, the coil drive element of the control circuit 6 and the input circuit 10 are of an FET configuration. Other configurations are the same as those in the first embodiment.

In the above configuration, in the case of the FET, since the input impedance is high, almost no gate current is required, and the DC rectified voltage of the capacitor 5a is maintained even when the pressure switch 8 is closed and the control circuit 6 and the input circuit 10 operate. , The output voltage of the DC rectifier circuit of the capacitor 5a can be increased, and the capacitance values of the first capacitor 2 and the second capacitor 3 can be reduced.

(Thirteenth Embodiment) As shown in FIG. 13, the control circuit 6 and the input circuit 10 are configured as transistors, and the bases are connected to the inputs. Other configurations are the same as those in the first embodiment.

In the above configuration, when the pressure switch 8 is turned on, the transistors 6a and 10a can be protected from external noise.

(Embodiment 14) As shown in FIG. 14, the output circuit 11 is constituted by resistors. Other configurations are the same as those in the first embodiment.

In the above configuration, according to the thirteenth embodiment, by disposing a base resistor in the transistor 6a of the control circuit 6, the microcomputer 9
, Via the resistor 11, the relay contact control by the control circuit 6 and the relay contact holding circuit from the microcomputer 9 can be shared.

When the output of the microcomputer is connected to the output terminal of the pressure switch 8, the output of the microcomputer may exceed the rated voltage when the switch 8 is closed. An output circuit is required to hold the relay including the relay.

(Embodiment 15) As shown in FIG. 15, the input circuit 10 connects the output terminal of the pressure switch 8 directly to the input terminal of the microcomputer 9. Other configurations are the same as those in the first embodiment.

In the above configuration, the change in the voltage at the output terminal of the pressure switch 8 is converted into a digital value in the microcomputer 9. The operation can be recognized. As a result, by connecting to the AD input built in the microcomputer 9, the connection line becomes an input circuit, and no components are required. Therefore, the number of components and the cost of components can be reduced.

(Embodiment 16) As shown in FIG. 16, the input circuit 10 has several voltage places to be taken out (for example, in front of other press-contact switches), a circuit system, and the like. As shown, the resistor 10b and the emitter of the transistor 10a are connected to the A-side terminal of the AC power supply, and the other end of the resistor 10b and 10c are connected to its base. A resistor 10d is connected to the collector, and the other end is connected to the power supply of the microcomputer 9. The collector of the transistor 10a is a microcomputer 9
Is being entered. The other end of the resistor 10c is an insulation displacement switch 8
Connected to the output terminal.

In the above configuration, even if the output terminal voltage of the pressure switch 8 when the contact of the pressure switch 8 is closed exceeds the power supply voltage of the microcomputer 9, the change in the output voltage caused by the opening and closing of the pressure switch 8 is not changed. Even if the voltage change is below the threshold voltage for detecting the high and low levels of the computer input, this is not directly input to the microcomputer input, but is converted to a voltage within the microcomputer input voltage rating. It is possible to prevent the destruction due to the application of an overvoltage to the power supply, or to reliably detect the change even if the voltage change is minute, and to make high and low inputs.

(Embodiment 17) As shown in FIG. 17, an input circuit 10 includes a constant voltage diode 10e and a pressure switch 8
The cathode is connected to the output terminal and the anode is connected to the A side terminal of the AC power supply, and the operating voltage is set to a voltage lower than the power supply voltage of the microcomputer and higher than the high detection of the microcomputer input. Other configurations are the same as those in the first embodiment.

In the above configuration, even when the DC rectified voltage of the capacitor 5a exceeds the power supply voltage rating of the microcomputer 9, when the pressure switch 8 is closed, the voltage is clamped by the constant voltage diode 10e. Without exceeding the input voltage rating of
Therefore, the degree of freedom in designing the first capacitor 2 and the second capacitor 3 can be increased. Also, the number of parts can be reduced.

(Embodiment 18) As shown in FIG. 18, the resistor 10f is arranged between the output terminal of the pressure switch 8 and the cathode of the constant voltage diode 10e. Other configurations are the same as those of the seventeenth embodiment.

In the above configuration, a circuit which is more resistant to external noise than the constant voltage diode 10e in the seventeenth embodiment can be provided. Therefore, a highly reliable circuit configuration that does not cause destruction even if a constant-voltage diode with a small rating is employed can be provided.
Thus, the current from the first capacitor 2 can be reduced.

(Embodiment 19) As shown in FIG. 19, the input circuit 10 is composed of a photocoupler. A photodiode 10g of the photocoupler is connected to the output terminal of the press-contact switch 8, and the positive The phototransistor 10h and the resistor 10i are connected from the side power supply to the minus side power supply, and input to the microcomputer from the emitter of the phototransistor 10h.

The output circuit 11 connects the resistor 11a to the photodiode 11b from the microcomputer output to the minus power supply of the microcomputer 9, and connects the phototransistor 11c and the resistor 11a from the cathode of the diode 7b to the base of the transistor 6a.
d is connected. Further, it is assumed that the power supply of the microcomputer 9 is different from the potentials of the A-side terminal and the B-side terminal of the AC power supply. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with respect to portions different from those of the first embodiment. When the pressure switch 8 is closed, a current flows through the photodiode 10g, which causes a current to flow through the phototransistor 10h, a current flows through the resistor 10i, and the microcomputer input goes high.

When this is detected, the microcomputer output goes high, and a current flows through the photodiode 11b via the resistor 11a. As a result, the transistor 6a is connected from the phototransistor 11c via the resistor 11d.
, A base current is supplied, and the transistor 6a is kept on.

This embodiment is effective in a circuit in which the power supply of the microcomputer 9 and the potential of the AC power supply 1 are not the same. For example, the present invention is effective in a case where an electronic circuit including the microcomputer 9 is formed after full-wave rectification of the AC power supply 1 or a case where the electronic circuit including the microcomputer 9 is insulated from the primary circuit.

(Embodiment 20) As shown in FIG. 20, resistors 18 and 19 are connected in series in this order to both ends of a capacitor 7a of the second DC rectifier circuit 7. The collector of the phototransistor 11c of the output circuit 11 is a resistor 1
It is connected to connection points 8 and 19. Other configurations are the same as those of the nineteenth embodiment.

In the above configuration, the phototransistor 1
To the collector 1c, a voltage obtained by dividing the voltage of the second DC rectifier circuit 7 is applied. Therefore, a collector having a small withstand voltage rating can be adopted, and the price can be reduced.

Embodiment 21 As shown in FIG.
The capacitor 20 of the type described above keeps the noise terminal voltage of the device within a predetermined value. Usually, a capacitance value of about 0.1 μF is often required. Other configurations are the same as those in the first embodiment.

In the above configuration, in a device employing a switching power supply, in the case of the RCC switching regulator method, countermeasures are often taken by using the third capacitor 20 and the input resistance of the switching power supply.

On the other hand, in Examples 1 to 20,
The capacitor 2 and the second capacitor 3 can be realized with smaller capacitance values. Therefore, as shown in FIG. 21, the first capacitor 2, the second capacitor 3, and the third capacitor 20 are required. However, the series connection of the first capacitor 2 and the second capacitor 3 makes By setting the noise terminal voltage to a capacitance value within a predetermined value, the capacitance of the first capacitor 2 and the second capacitor 3 can be reduced.
It can be realized by individual.

(Embodiment 22) As shown in FIG.
The capacitor 21 is for protecting the device from malfunction or destruction of the device from external noise (including lightning surge or the like) that enters the device. Other configurations are the same as those in the first embodiment.

In the above configuration, as in the case of the twenty-first embodiment, the energy supplied to the control circuit 6 via the pressure switch 8 and the energy for driving the input circuit 10 are provided by a capacitor necessary for countermeasures against external noise. Although a capacity is not required, the number of components can be reduced by setting the same value in the same manner.

(Embodiment 23) As shown in FIG.
The capacitor 21 and the sixth capacitor 23 are connected in series between the lines of the AC power supply 1, and the partial pressure of these capacitors enables the use of the small signal pressure switch 8. Other configurations are the same as those in the first embodiment.

In the above configuration, the capacitance value and the voltage dividing ratio of the fifth capacitor 21 and the sixth capacitor 23 as the energy supply source for the control after the pressure switch 8 have a degree of freedom in design, and are fixed. Due to the voltage dividing ratio, the voltage and current rating of the pressure switch 8 can be reduced as compared with the pressure switch 8 arranged in the conventional AC power supply line.

However, the pressure contact switches are roughly classified into those for electric power and those for small signals, and there are large differences in voltage, current rating, component size, and price between them, so that the present invention can be most effectively implemented. Is to employ a small signal pressure switch. The fifth capacitor 21 and the sixth capacitor 23 are set to a voltage dividing ratio of the AC power supply voltage that enables the use of the small signal pressure switch.

(Embodiment 24) As shown in FIG.
The capacitor 24 and the eighth capacitor 25 are connected in series between the lines of the AC power supply 1.
3 satisfies the limit values shown in the respective embodiments by the respective capacitors. Other configurations are the same as those in the first embodiment.

In the above configuration, by setting such constants, the capacitor for the control circuit 6 and the input circuit 10, the capacitor for the noise terminal voltage, and the capacitor for the external noise are integrated, and the pressure switch for small signal is integrated. It is possible to obtain a series capacitor that satisfies all of these requirements by integrating capacitance values that enable the use of the above.

Embodiment 25 As shown in FIG. 25, the collector of the phototransistor 11c is connected to the output of the DC rectifier circuit of the capacitor 5a of the DC rectifier circuit 5. Other configurations are the same as those of the twentieth embodiment.

In the above configuration, power loss due to the resistors 18 and 19 can be further reduced in the twentieth embodiment as compared to the twentieth embodiment.

[0115]

As described above, according to the first aspect of the present invention, a capacitor connected in series between AC power supply lines in a device, a relay contact arranged on the AC power supply line, and the capacitor A DC rectifier circuit obtained from one of the two ends, a control circuit for driving a relay coil to control the on / off of a relay contact, and a second DC rectifier disposed between an AC power supply and created for supplying current to the relay coil. A rectifier circuit, a pressure switch disposed between one of the capacitors and the control circuit, a microcomputer that starts operating when the relay contact is closed, and a voltage in the circuit that changes by operation of the pressure switch to the microcomputer. An input circuit for inputting and a microcomputer output for reading the input circuit voltage and outputting an output for controlling the driving of the relay coil. And an output circuit for driving Koiru, said from having a function of controlling on and off of the relay contact by pressure switch, by using the micro power obtained from the capacitor, the voltage of the pressure switch,
The current rating can be reduced and the shape can be reduced, resulting in lower component prices, mounting on printed circuit boards, simplified assembly, simplified internal configuration of equipment, reduced assembly man-hours, and abolished lead wires or connectors. Therefore, it is possible to eliminate the aerial wiring and to reduce the defects due to these, and the standby power can be reduced to zero or minimum.

According to the second aspect of the present invention, since a resistor is connected to one end of the capacitor, a high DC rectifier circuit output voltage and current can be obtained. The capacitance of the capacitor can be reduced, the degree of freedom in the capacitance ratio can be improved, and the current amplification factor of the transistors in the control circuit and input circuit can be reduced, thereby expanding the selection range of the current amplification ratio. Also, the design value of the base resistance can be improved in the degree of freedom.

According to the third aspect of the present invention, the diode is connected to one end of the capacitor in the direction in which the output voltage of the DC rectifier circuit is generated. Compared to this, higher voltage and current can be obtained.

According to the fourth aspect of the present invention, since the resistor is connected in parallel with the diode, the values of the first capacitor and the second capacitor are not continuous but discrete values. Although fine adjustment of the voltage is not effective, the output voltage can be adjusted by connecting a resistor in parallel, so that the voltage rating of the insulation displacement switch or capacitor can not be exceeded, thereby reducing the component rating. ,
Parts can be reduced in size.

According to the fifth aspect of the present invention, since the resistor is connected in series with the diode, the output voltage can be adjusted in the same manner as in the fourth aspect of the present invention. Voltage rating, which can reduce the component rating and reduce the size of components, and increase the degree of freedom in design. It is also possible to improve the easiness to carry out.

According to the sixth aspect of the present invention, a constant voltage diode is connected to one end of the capacitor in a direction in which the output voltage of the DC rectifier circuit is stabilized. In addition to the above-mentioned effect, the output voltage of the DC rectifier circuit can be limited to a certain value or less by the constant voltage operation. It is also possible to obtain a guarantee of the voltage rating of the insulation displacement switch, etc., that is, it is possible to further enhance the effects of the present invention.

According to the seventh aspect of the present invention, a resistor and a constant voltage diode are connected in series to one end of a capacitor, and a DC rectifier circuit is connected to both ends of the constant voltage diode. The diode can be prevented from being destroyed by external noise (lightning surge, other noise), and a constant voltage diode with a small current rating can be used, realizing miniaturization of parts and reduction in price. be able to.

According to the eighth aspect of the present invention, since the press-contact switch is arranged at one output of the capacitor,
While using the small signal switch, the active power can be reduced to 0 when the power is off, and the external noise from the AC power supply is cut off except when the pressure switch is operated, so the noise is reduced. , And the chance of damage to the component due to external noise is reduced, thereby improving reliability in terms of circuit quality and extending the life of the component.

According to the ninth aspect of the present invention, since the pressure contact switch is arranged before the capacitor for obtaining the DC voltage of the DC rectifier circuit, the capacitor is connected to the input of the control circuit and the input circuit. Malfunction of the control circuit and the input circuit due to external noise can be prevented. In other words, one capacitor has two functions of a DC rectifying capacitor and a function of preventing malfunction due to external noise by one capacitor.

According to the tenth aspect of the present invention,
Since the pressure switch is disposed after the capacitor for obtaining the DC voltage of the DC rectifier circuit, the DC rectifier capacitor is constantly charged. If a time delay is required for driving the relay or inputting a signal to the microcomputer due to the need for time, the operation can be performed without a time delay.

According to the eleventh aspect of the present invention,
The DC rectifier circuit is a series connection of a capacitor, a resistor, and a diode, and the output is obtained from a capacitor.Therefore, a diode with a small rating can be used for external noise that enters from an AC power supply and for destruction of the diode. Reliability can be ensured while employing.

According to the twelfth aspect of the present invention,
Since the control circuit and the input circuit are configured as FETs, the active current of the control circuit and the input circuit is set to the FET, and the input current is almost 0. Therefore, the voltage of the DC rectifying capacitor closes the pressure contact switch. In this case, there is almost no voltage drop, and therefore, the power supply from the capacitor is small, so that the capacitance value of the capacitor can be reduced. As a result, the size of the component can be reduced.

According to the thirteenth aspect of the present invention,
The control circuit and the input circuit are configured as transistors, and a resistor is connected to the base.This protects the transistor against external noise from the AC power supply with the base resistor, and the low input impedance of the transistor reduces the base resistance In combination with the above, a configuration that is more resistant to external noise than the FET configuration according to the twelfth aspect can be achieved.

According to the fourteenth aspect of the present invention,
The output circuit is configured such that a resistor is connected from the output terminal of the microcomputer and the other end is connected to the base of the transistor of the control circuit according to claim 13. The control circuit can be shared for control from a computer.

According to the fifteenth aspect of the present invention,
The output terminal of the insulation displacement switch is connected to the microcomputer AD
Since the input circuit is configured to be connected to the input, the configuration is such that the voltage change is detected inside the microcomputer using the AD input of the microcomputer, thereby reducing the number of components of the input circuit and realizing only by circuit connection. And the number of parts can be reduced. When the voltage of the capacitor, which is the DC rectifier circuit voltage when the pressure switch is closed, exceeds the input voltage rating of the microcomputer, the voltage can be adjusted so as not to exceed the rating by resistance division. It can also be realized by setting the operating voltage of the constant voltage diode to a value that does not exceed the input voltage rating of the microcomputer in combination with the inventions described in 6 and 7.

According to the sixteenth aspect of the present invention,
Input from the output terminal of the insulation displacement switch to the transistor via a resistor, connect the emitter terminal of the transistor to the minus power supply of the microcomputer, connect the other end of the resistor connected from the collector to the other power supply of the microcomputer, and connect the collector output. Since the input circuit is configured to input to the microcomputer, even if the DC rectifier circuit voltage generated at the capacitor exceeds the microcomputer input voltage rating, the microcomputer input will not be higher or lower than the voltage rating of the microcomputer input terminal. Therefore, the degree of freedom in designing the first capacitor and the second capacitor is increased, and a circuit with high reliability even when the AC power supply voltage fluctuates can be realized. it can.

According to the seventeenth aspect of the present invention,
A constant voltage diode is connected from the output terminal of the pressure switch and an input circuit is provided to input the voltage obtained from both ends to the microcomputer. Therefore, the components of the input circuit can be realized by one constant voltage diode, and the number of components can be reduced. be able to.

According to the eighteenth aspect of the present invention,
Since the resistor and the constant voltage diode are connected from the output terminal of the pressure switch and the input circuit inputs the voltage obtained from both ends to the microcomputer, the effect of the invention according to claim 17 can be obtained. Reliability of the constant voltage diode against destruction due to external noise can be improved.

Further, according to the nineteenth aspect,
A capacitor connected in series between AC power lines in the device, a relay contact arranged on the AC power line, and a DC rectifier circuit output obtained from one end of the capacitor,
A control circuit for driving the relay coil, a second DC rectifier circuit arranged between the AC power supply and created for supplying current to the relay coil, and a press-contact switch arranged between one of the capacitors and the control circuit; A microcomputer that starts operating when the relay contact is closed, a second input circuit that inputs a current in the circuit that changes by the operation of the pressure contact switch to the microcomputer through a photocoupler, and a microcomputer that reads the input circuit voltage Second from output
And a second output circuit that controls the relay coil using the output photocoupler, and has a function of controlling the on / off of the relay contact by the press-contact switch, so that the voltages of the microcomputer power supply and the AC power supply line do not match. The control device of the present invention is realized in a circuit, that is, in a case where a microcomputer is present in a secondary circuit insulated from an AC power supply, or in a circuit in which a microcomputer is present in an electronic circuit obtained by full-wave rectification of an AC power supply. It is possible.

According to the twentieth aspect of the present invention,
Since the power supply of the phototransistor of the photocoupler that drives the relay coil is obtained from the divided voltage of the second DC rectifier circuit, in addition to the above-described claim 19,
The voltage rating of the phototransistor of the photocoupler can be reduced, and the cost of parts can be reduced.

According to the twenty-first aspect of the present invention,
Since the constants are used to realize the noise terminal countermeasures of the equipment with the capacitors connected in series with the AC power supply, the ones that require a total of three capacitors, a capacitor necessary for noise terminal voltage countermeasures and a capacitor for switch control, Switch control power can be supplied while limiting the noise terminal voltage to within a predetermined value by the two capacitors.

According to the twenty-second aspect of the present invention,
Since a capacitor connected in series with the AC power supply is used as a constant to prevent malfunction and destruction of equipment due to external noise,
Protect the equipment from malfunction and destruction of the circuit due to external noise with two capacitors, and supply power for switch control, for those that require two capacitors for external noise countermeasures and switch control. Can be.

According to the twenty-third aspect of the present invention,
The capacity ratio that allows the use of a small signal pressure switch by means of a capacitor connected in series to the AC power supply allows the pressure switch to be used for small signals, realizing downsizing of parts and cost reduction. Can be.

According to the twenty-fourth aspect of the present invention,
The capacitor connected in series to the AC power supply is used as a measure against noise terminal of equipment, measures against external noise, and a constant and capacity ratio that can be used for small signal pressure switch. , A small signal pressure switch can be used.

According to the twenty-fifth aspect of the present invention,
Because the power supply of the phototransistor of the photocoupler that drives the relay coil is taken from the output of the DC rectifier circuit, the voltage rating of the phototransistor of the photocoupler can be reduced, and the cost of parts can be reduced. A power on / off system with even smaller power loss can be realized.

[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.

FIG. 2 is a circuit diagram of a control device for a washing machine or the like according to a second embodiment of the present invention.

FIG. 3 is a circuit 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.

FIG. 5 is a circuit diagram of a control device for a washing machine or the like according to a fifth embodiment of the present invention.

FIG. 6 is a circuit 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 of a control device for a washing machine or the like according to a seventh embodiment of the present invention.

FIG. 8 is a circuit diagram of a control device for a washing machine or the like according to an eighth embodiment of the present invention.

FIG. 9 is a circuit diagram of a control device for a washing machine or the like according to a ninth embodiment of the present invention.

FIG. 10 is a circuit diagram of a control device for a washing machine or the like according to a tenth embodiment of the present invention.

FIG. 11 is a circuit diagram of a control device for a washing machine or the like according to an eleventh embodiment of the present invention.

FIG. 12 is a circuit diagram of a control device for a washing machine or the like according to a twelfth embodiment of the present invention.

FIG. 13 is a circuit diagram of a control device for a washing machine or the like according to a thirteenth embodiment of the present invention.

FIG. 14 is a circuit diagram of a control device for a washing machine or the like according to a fourteenth embodiment of the present invention.

FIG. 15 is a circuit diagram of a control device for a washing machine or the like according to a fifteenth embodiment of the present invention.

FIG. 16 is a circuit diagram of a control device for a washing machine or the like according to a sixteenth embodiment of the present invention.

FIG. 17 is a circuit diagram of a control device for a washing machine or the like according to a seventeenth embodiment of the present invention.

FIG. 18 is a circuit diagram of a control device for a washing machine or the like according to an eighteenth embodiment of the present invention.

FIG. 19 is a circuit diagram of a control device for a washing machine or the like according to a nineteenth embodiment of the present invention.

FIG. 20 is a circuit diagram of a control device for a washing machine or the like according to a twentieth embodiment of the present invention.

FIG. 21 is a circuit diagram of a control device for a washing machine or the like according to a twenty-first embodiment of the present invention.

FIG. 22 is a circuit diagram of a control device for a washing machine or the like according to a twenty-second embodiment of the present invention.

FIG. 23 is a circuit diagram of a control device for a washing machine or the like according to a twenty-third embodiment of the present invention.

FIG. 24 is a circuit diagram of a control device for a washing machine or the like according to a twenty-fourth embodiment of the present invention.

FIG. 25 is a circuit diagram of a control device for a washing machine or the like according to a twenty-fifth embodiment of the present invention.

FIG. 26 is a circuit diagram of a first example of a conventional control device for a washing machine or the like.

FIG. 27 is a circuit diagram of a second example of a conventional control device for a washing machine or the like.

FIG. 28 is a circuit diagram of a third example of a conventional control device for a washing machine or the like.

FIG. 29 is a circuit diagram of a fourth example of a conventional control device for a washing machine or the like.

[Explanation of symbols]

 Reference Signs List 1 AC power supply 2 First capacitor (capacitor) 3 Second capacitor (capacitor) 4a Relay contact 4b Relay coil 5 DC rectifier circuit 6 Control circuit 7 Second DC rectifier circuit 8 Pressure switch 9 Microcomputer 10 Input circuit 11 Output circuit

Claims (25)

[Claims] 1. A capacitor connected in series between AC power supply lines in a device, a relay contact disposed on the AC power supply line, a DC rectifier circuit obtained from one end of one of the capacitors, and a relay coil driven. A control circuit for controlling the on / off of a relay contact; a second DC rectifier circuit arranged between an AC power supply for current supply to the relay coil; and a pressure contact arranged between one of the capacitors and the control circuit. A switch, a microcomputer that starts operating when the relay contact closes, an input circuit that inputs a voltage in a circuit that changes by the operation of the press-contact switch to the microcomputer, and drives the relay coil by reading the input circuit voltage. An output circuit connected to a microcomputer output for outputting an output to be controlled and driving a relay coil; A control device such as a washing machine having a function of controlling on / off of the relay contact by a switch. 2. The control device according to claim 1, wherein a resistor is connected to one end of the capacitor. 3. The control device for a washing machine or the like according to claim 1, wherein a diode is connected to one end of the capacitor and the direction of the diode is connected to a direction in which a DC rectifier circuit output voltage is generated. 4. The control device for a washing machine or the like according to claim 3, wherein a resistor is connected in parallel with the diode. 5. The control device for a washing machine or the like according to claim 3, wherein a resistor is connected in series with the diode. 6. The control device for a washing machine or the like according to claim 1, wherein a constant voltage diode is connected to one end of the capacitor so as to stabilize the output voltage of the DC rectifier circuit. 7. The control device for a washing machine or the like according to claim 1, wherein a resistor and a constant voltage diode are connected in series to one end of the capacitor, and a DC rectifier circuit is connected to both ends of the constant voltage diode. 8. The control device for a washing machine or the like according to claim 1, wherein a pressure switch is disposed at one output of the capacitor. 9. The control device for a washing machine or the like according to claim 1, wherein a pressure contact switch is disposed in front of the capacitor for obtaining the DC voltage of the DC rectifier circuit. 10. The control device for a washing machine or the like according to claim 1, wherein a pressure contact switch is disposed after the capacitor for obtaining the DC voltage of the DC rectifier circuit. 11. The control device for a washing machine or the like according to claim 1, wherein the DC rectifier circuit is configured by connecting a capacitor, a resistor, and a diode in series, and an output thereof is obtained from the capacitor. 12. The control device for a washing machine or the like according to claim 1, wherein the control circuit and the input circuit have an FET configuration. 13. The control device for a washing machine or the like according to claim 1, wherein the control circuit and the input circuit have a transistor configuration, and a resistor is connected to the base. 14. The control of a washing machine or the like according to claim 1, wherein the output circuit is configured to connect a resistor from the output terminal of the microcomputer and to connect the other end to the base of the transistor of the control circuit according to claim 13. apparatus. 15. The control device for a washing machine or the like according to claim 1, wherein the input terminal has a configuration in which an output terminal of the pressure contact switch is connected to an AD input of the microcomputer. 16. An input terminal of a pressure contact switch is input to a transistor via a resistor, an emitter terminal of the transistor is connected to a minus power source of the microcomputer, and the other end of the transistor connected to the resistor is connected to the other power source of the microcomputer. 2. The control device of a washing machine or the like according to claim 1, wherein the input circuit is configured to input a collector output to the microcomputer. 17. The control device for a washing machine or the like according to claim 1, wherein a constant voltage diode is connected from an output terminal of the pressure switch to an input circuit for inputting a voltage obtained from both ends thereof to a microcomputer. 18. The control device for a washing machine or the like according to claim 1, wherein a resistor and a constant voltage diode are connected from an output terminal of the press-contact switch, and an input circuit for inputting a voltage obtained from both ends thereof to a microcomputer. 19. A capacitor connected in series between AC power supply lines in a device, a relay contact disposed on the AC power supply line, a DC rectifier circuit output obtained from one end of the capacitor, and a relay coil. A control circuit;
A second DC rectifier circuit arranged between the AC power supply and created for supplying current to the relay coil, a pressure contact switch arranged between one of the capacitors and the control circuit, and a micro-switch which starts operating when the relay contact is closed; A computer, a second input circuit for inputting a current in the circuit which changes by operation of the pressure switch to the microcomputer via a photocoupler, and a second output photocoupler from the microcomputer output by reading the input circuit voltage. A control device such as a washing machine having a second output circuit for controlling a relay coil by using the same, and having a function of controlling on / off of a relay contact by the pressure contact switch. 20. The control device for a washing machine or the like according to claim 19, wherein the power supply of the phototransistor of the photocoupler for driving the relay coil is obtained from the divided voltage of the second DC rectifier circuit. 21. The control device for a washing machine or the like according to claim 1, wherein the control device is a constant that realizes a measure against noise terminals of the device by a capacitor connected in series to an AC power supply. 22. The control device for a washing machine or the like according to claim 1, wherein a capacitor connected in series with the AC power supply has a constant for preventing malfunction and destruction of the device due to external noise. 23. The control device for a washing machine or the like according to claim 1, wherein the capacity ratio is such that a small-signal press-contact switch can be employed by a capacitor connected in series to an AC power supply. 24. A constant and a capacitance ratio which allow a capacitor connected in series with an AC power supply to take measures against noise terminals of equipment, countermeasures against external noise, and use of a small signal pressure switch. A control device such as the washing machine described in the above. 25. The control device for a washing machine or the like according to claim 20, wherein the power supply of the phototransistor of the photocoupler for driving the relay coil is obtained from the output of the DC rectifier circuit.