JP2002065567A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent secondary damage or enlarged damage by driving a drainage device upon detecting water supply abnormality at power off caused by a failure in a dishwasher for washing dishes and to reduce effective power consumption to micro power or zero in the monitoring state and at power off. SOLUTION: When a microswitch 10 is closed due to the occurrence of overflow, voltage obtained from both ends of one of a first capacitor 2 and a second capacitor 3 connected in series between the lines of an AC power source 1 is supplied to a second control circuit 8 through the microswitch 10 to turn on a relay 6 disposed on the line of the AC power source 1. A microcomputer thereby starts its action and recognizes the on state of the microswitch 10 to drive the drainage device 20. Even when the power is switched on and off by a pressure contact switch 9, the relay 6 is controlled by using the voltage obtained from both ends of one of the capacitors connected in series between the lines of the AC power source 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes.

[0002]

2. Description of the Related Art Conventionally, this type of dishwasher has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG. 4, a washing tank 17 of a dishwasher main body is provided with a float 18 on its bottom surface 17a so as to be movable up and down. When water accumulates on the bottom surface 17a, it rises by buoyancy.
The structure is such that the contacts of the microswitch (detection switch) 10 are closed. Water supply device 19 and drainage device 20
Is controlled by the microcomputer 12a.

The electronic circuit 12 including the microcomputer 12a is always energized from the AC power supply 1, and the state of the contact changes only when the press-contact switch is operated. When the operating force is removed, the contact returns to the original state. Each time a return-type switch is called a press-contact switch in the present invention), the relay 6 constituting the switch is turned on and off, and the water supply device 19 and the drainage device 20 become operable when the relay 6 is turned on. It is configured to operate according to a command from the computer 12a.

When the relay 6 is off, the water supply device 19
Abnormality occurs (for example, foreign matter is caught in the water supply valve),
When water accumulates on the bottom surface 17a of the washing tank 17 and rises to a certain water level, the float 18 pushes the microswitch 10 to turn on, the microcomputer 12a detects this, and outputs a high output from the microcomputer 12a to the output circuit 15. .

Thus, the transistor 7 of the control circuit 7
is turned on, a current flows from the power supply 5 to the relay coil 6b via the resistor 7c, the relay contact 6a is turned on, the drainage device 20 becomes operable, and the microcomputer 12
the drainage device 20 is driven by the output from the
The water in 7 is drained, and at the same time, the occurrence of an abnormality is notified by the abnormality notification device 16. This prevents a failure or an extended damage of the electronic circuit of the device due to the occurrence of the water supply abnormality.

[0007]

However, in such a conventional configuration, since the electronic circuit 12 is always in an energized state for monitoring a water supply abnormality, there is a problem that the device consumes active power. Had. Further, since the electronic circuit 12 is energized for 24 hours, its durability is shorter than that of a device which is energized only during use.

The present invention solves the above-mentioned conventional problems. When an abnormality is detected in water supply when the power is turned off due to a failure of the equipment, the drainage device is driven to prevent secondary damage or spread damage and to monitor the state of monitoring. Also, it aims to make the effective power consumption extremely small or zero when the power is turned off.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides, when an overflow occurs and a detection switch is closed, only one end of a capacitor connected in series between AC power supply lines. The voltage is supplied to the control circuit through the microswitch, the switch arranged on the AC power supply line is turned on, and the microcomputer which starts operating thereby recognizes that the detection switch is on, and detects the occurrence of overflow, It drives the drainage device. Also, when the power is turned on and off by the press-contact switch, a switch arranged on the AC power supply line is controlled by using a voltage obtained from one end of one of the capacitors connected in series between the AC power supply lines.

[0010] With this, when an abnormality is detected in the water supply when the power is turned off due to equipment failure, the drainage device is driven to prevent secondary damage or extended damage, and the effective power consumption is minimized in the monitoring state and when the power is turned off. It can be small or zero.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a float which is disposed in a washing tank and moves up and down according to the water level of the washing tank, a detection switch for turning on a contact by the float, a water supply device, A drainage device, a capacitor connected in series between AC power supply lines in the device, a resistor connected to one end of the capacitor, a DC rectifier circuit obtained from one end of the capacitor, and an AC power supply line. A switch, a first control circuit and a second control circuit for controlling a control terminal of the switch, a press-contact switch disposed between the DC rectifier circuit and the first control circuit,
A second DC rectifier circuit created between the AC power supply lines for the power supplies of the first and second control circuits, a microcomputer that is supplied with power to the apparatus when the switch is closed and starts operating, A first input circuit for inputting a voltage in the circuit that changes by on / off to a microcomputer, a second input circuit for inputting a voltage in the circuit that changes by on / off of the detection switch to the microcomputer, and the microcomputer An output circuit that reads the first or second input circuit voltage and outputs an output for controlling the switch, and an abnormality notification device, wherein the detection switch is disposed between the DC rectifier circuit and a second control circuit. When the switch is turned on, the microcomputer is turned on by either the first or second input circuit. When the detection switch is turned on, the drainage device is driven, and at the same time, the abnormality notification device is driven.When the pressure switch is turned on, a series of dishwashing steps are executed according to a microcomputer program. When it is turned on, it determines that the water supply is normal, and has a function to execute a program by determining a series of dishwashing steps. Damage or spreading damage can be prevented, and the effective power consumption can be reduced to a very small value or 0 when the monitoring state and the power supply are turned off.

According to a second aspect of the present invention, there is provided a float disposed in a washing tank and moving up and down according to the water level of the washing tank, a detection switch for turning on a contact by the float, a water supply device,
A drainage device, a capacitor connected in series between the AC power supply lines in the device, a switch arranged on the AC power supply line, a pressure switch connected to one output terminal of the capacitor, and the capacitor via the pressure switch. A resistor and a DC rectifier circuit connected between one of the two terminals;
A first control circuit disposed between the output of the DC rectifier circuit and the control terminal of the switch to control the control terminal of the switch; and a second control circuit connected between the two terminals of the capacitor via the detection switch. A third DC rectifier circuit, a second control circuit disposed between the third DC rectifier circuit output and the control terminal of the switch, and controlling the control terminal of the switch; A second DC rectifier circuit created between the AC power supply lines for the power supply of the control circuit of No. 2, a microcomputer that is supplied with power to the device when the switch is closed and starts operating, and a circuit that changes by turning on and off the press-contact switch A first input circuit for inputting the internal voltage to the microcomputer, and a voltage in the circuit which changes by turning on and off the detection switch. A second input circuit, an output circuit for reading the first or second input circuit voltage by the microcomputer and outputting an output for controlling the switch, and an abnormality notification device. And the microcomputer is connected to the first or second output terminal when the switch is turned on.
It is determined which of the input circuits is turned on.When the detection switch is turned on, the drainage device is driven, and at the same time, the abnormality notification device is driven.When the pressure switch is turned on, a series of dishwashing steps is performed according to the microcomputer program. When the detection switch is turned on during the water supply process, it is determined that the water supply is normal, and a series of dishwashing steps is performed, and the program is executed.When the water supply abnormality is detected when the power is turned off due to equipment failure, drainage is performed. By driving the device, secondary damage or extended damage can be prevented, and the effective power consumption can be reduced to zero when the device is monitored and the power is turned off.

According to a third aspect of the present invention, there is provided a float disposed in a washing tank and moving up and down according to the water level of the washing tank, a detection switch for turning on a contact by the float, a water supply device,
A drainage device, a capacitor connected in series between AC power supply lines in the device, a resistor connected to one end of the capacitor, a DC rectifier circuit obtained from one end of the capacitor, and an AC power supply line. Switch and
A first control circuit and a second control circuit for controlling a control terminal of the switch; a press-contact switch disposed between one output terminal of the capacitor and the first control circuit; A second DC rectifier circuit created between the AC power supply lines for the power supply of the control circuit, a microcomputer that is supplied with power to the device when the switch is closed and starts operating, and a circuit in which the ON / OFF state of the pressure contact switch changes. Third to input current to microcomputer
An input circuit, a fourth input circuit for inputting a current in a circuit that changes by turning on and off the detection switch to a microcomputer, and reading the third or fourth input circuit voltage by the microcomputer to switch the switch. An output circuit for outputting an output to be controlled, and an abnormality notification device, wherein the detection switch is arranged between one output terminal of the capacitor and a second control circuit, and when the switch is turned on, the microcomputer Third or fourth
It is determined which of the input circuits is turned on.When the detection switch is turned on, the drainage device is driven, and at the same time, the abnormality notification device is driven.When the pressure switch is turned on, a series of dishwashing steps is performed according to the microcomputer program. When the detection switch is turned on during the water supply process, it is determined that the water supply is normal water supply, and it has a function to execute a program by determining a series of dishwashing processes, regardless of the power supply configuration of the electronic circuit. When the water supply abnormality is detected when the power supply is turned off, the drainage device is driven to prevent secondary damage or extended damage, and the effective power consumption is minimized or reduced when the monitoring state and the power supply are turned off.
It can be.

[0014]

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 between lines. One end of the first capacitor 2 is connected to the A-side terminal, and the second capacitor 3 is connected to the B-side terminal of the AC power supply 1.
Are connected at one end. Hereinafter, the connection point between the first capacitor 2 and the second capacitor 3 is referred to as a capacitor output point.

The resistor 4 is connected to both ends of the first capacitor 2. The DC rectifier circuit 5 is connected to both ends of the first capacitor 2 in order from the capacitor output point to the anode, cathode, and capacitor 5a of the diode 5b. Hereinafter, the DC voltage generated in the capacitor 5a is referred to as a DC rectified voltage. A high DC rectified voltage can be obtained by the resistor 4. Also, the available current increases. Thereby, the capacitance values of the first capacitor 2 and the second capacitor 3 can be reduced.

The relay 6 constitutes a switch, and is constituted by a relay contact 6a arranged on the B-side line of the AC power supply 1 and a relay coil 6b as a switch control unit. The first control circuit 7 controls the opening and closing of the relay contact 6a through the driving of the relay coil 6b.
And a resistor 7c for limiting the current of the relay coil 6b to within a rated value.

For the connection, the other end of the resistor 7c connected to the relay coil 6b is connected to the collector of the transistor 7a, its base is connected to the resistor 7b, and its emitter is connected to the A side terminal of the AC power supply 1. . This first control circuit 7
Can be constituted by a current amplifying circuit or a voltage amplifying circuit, and its elements can be realized by a transistor, an FET, a photocoupler, or the like. In this embodiment, an example of a current amplifying circuit using a transistor is shown.

The second control circuit 8 comprises a resistor 8a, a transistor 7a and a collector resistor 7c. In this embodiment, the first control circuit 7 and the second control circuit 8
Have a common configuration except for the base resistor, but they can also be created independently. The pressure contact switch 9 is connected to the output of the DC rectifier circuit 5 and the other end of the resistor 7b.

Micro switch (detection switch) 10
Is connected to the output of the DC rectifier circuit 5 and the other end of the resistor 8a. The second DC rectifier circuit 11 is a power supply for driving the relay coil 6b. The connection is made by connecting the resistor 11c and the diode 1 from the B-side terminal of the AC power supply 1 to the A-side terminal.
1b, the anode, the cathode, and the capacitor 11a are connected in this order, and the other end of the relay coil 6b is connected to the diode 11b.
b and the connection point of the capacitor 11a.

The electronic circuit 12 of the device has a microcomputer 12a, and its minus power supply is connected to the A
Connected to side terminal. The first input circuit 13 connects the resistor 13, the cathode of the constant voltage diode 13a, and the anode in this order from the connection point of the press-contact switch 9 and the resistor 7b to the A side terminal of the AC power supply, and connects the cathode of the constant voltage diode 13a to the micro terminal. It is input to the computer 12a.

The second input circuit 14 connects the resistor 14b, the cathode of the constant voltage diode 14a, and the anode in this order from the connection point of the microswitch 10 and the resistor 8a to the A side terminal of the AC power supply 1, and connects the constant voltage diode 14a Is input to the microcomputer 12a.

In this embodiment, it is assumed that the DC rectified voltage of the capacitor 5a generates a voltage higher than the input terminal voltage rating of the microcomputer 12a. Therefore, the operating voltage of the constant voltage diodes 13a and 14a is such that the voltage applied to the input terminal of the microcomputer 12a when the contact of the pressure switch 9 or the micro switch 10 is closed is lower than the input voltage rating of the microcomputer 12a, And the microcomputer 12a
It is assumed that a voltage higher than the threshold voltage for high-level detection is used.

In this embodiment, the output circuit 15 is connected from the output terminal of the microcomputer 12a to the base of the transistor 7a. The abnormality notification device 16 is controlled by the output of the microcomputer 12a.

The washing tank 17 accommodates dishes for washing. A float 18 is provided on the bottom surface 17a so as to be movable up and down. When water accumulates on the bottom surface 17a, the float 18 rises by buoyancy, and when the water level reaches a constant value, a micro switch is used. The structure is such that ten contacts are closed. The water supply device 19 is controlled by the microcomputer 12a, and the drainage device 20 is similarly controlled by the microcomputer 12a.

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 applied to both ends of the capacitor 5 a by the capacitor 5 a and the diode 5 b of the DC rectifier circuit 5. Voltage is generated. The resistor 4 is for increasing the output voltage and current of the DC rectifier circuit 5 and for improving the controllability of the subsequent circuits.

When the water level in the washing tank 17 rises due to a failure of the water supply device 19 when the relay 6 is off, the float 18 rises according to the water level, reaches a certain water level, and the microswitch 10 Press to close the contact,
The second control circuit 8 from the capacitor 5a of the DC rectifier circuit 5
The base current is supplied to the transistor 7a via the base resistor 8a, the transistor 7a is turned on, the collector current flows from the second DC rectifier circuit 11, the current limited by the resistor 7c flows to the relay coil 6b, The contact 6a closes.

Thus, the microcomputer 12a
Starts working. The microcomputer 12a monitors the voltages of the first input circuit 13 and the second input circuit 14, and detects that the voltage from the second input circuit 14 is high. Recognizing that it has been closed, the drainage device 20 is driven to drain water, and the abnormality notification circuit 16 is driven to notify that an abnormality has occurred.

Next, when the pressure switch 9 is pressed, a base current is supplied from the output of the DC rectifier circuit 5 to the transistor 7a, and the relay 6 is turned on. As a result, the microcomputer 12a starts operating and the first input circuit 13
Recognizes that the output voltage is high, and outputs a high voltage to the output circuit 15 to keep the relay 6 on. As a result, the relay 6 is kept on even if the operation of the pressure switch 9 is released.

Subsequently, the microcomputer 12
Wash and rinse according to the contents programmed in a.
Perform a series of dishwashing steps, such as drying. When the microcomputer 12a issues a command to drive the water supply device 19 in the water supply process, the cleaning tank 17
When the water level rises and the micro switch 10 is pressed, it is determined that predetermined water has been supplied, and the process proceeds to the next step of dishwashing.

When a series of dishwashing steps is completed, the microcomputer 12a outputs a low output to the output circuit 15 and turns off the relay 6. When the relay 6 is manually turned off, the relay 6 is turned off by pressing the pressure switch 9.

As described above, when the micro switch 10 is closed due to the occurrence of overflow, the micro switch 10 is obtained from one end of the first capacitor 2 and the second capacitor 3 connected in series between the lines of the AC power supply 1 for the first time. The voltage is supplied to the second control circuit 8 through the microswitch 10 and the relay 6 arranged on the line of the AC power supply 1 is turned on, whereby the microcomputer 12a which starts operation recognizes that the microswitch 10 is turned on. Then, by detecting the occurrence of overflow and driving the drainage device 20, when water supply abnormality occurs when the power supply is turned off due to a failure of the water supply device 19 or the like, secondary damage or extended damage can be prevented and its monitoring is performed. The effective power consumption in the state can be extremely small or zero.

Also, when the power is turned on and off by the press-contact switch, the relay 6 disposed on the AC power supply line is controlled by utilizing the voltage obtained from one end of one of the capacitors connected in series between the AC power supply lines. When the power is turned off, the effective power consumption can be made extremely small or zero.

(Embodiment 2) As shown in FIG. 2, the third DC rectifier circuit 21 is connected between the other end of the microswitch 10 connected to the capacitor output point and the A-side terminal of the AC power supply 1.
Anode, cathode, capacitor 2 of diode 21b
1a. The second resistor 22 is connected to the anode of the diode 21b and the A-side terminal of the AC power supply 1.

The output of the capacitor 5a is connected to the resistor 7b of the first control circuit 7 and the resistor 13b of the first input circuit 13. The output of the capacitor 21a is connected to the resistor 8a of the second control circuit 8 and the resistor 14a of the second input circuit 14.
b is connected. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The basic operation is the same as that of the first embodiment, except that the first control circuit 7 or the second control circuit 7 or the micro switch 10 is closed for the capacitor charging time after the pressure switch 9 or the micro switch 10 is closed.
The response of the control circuit 8 and the first input circuit 13 or the second input circuit 14 is delayed.

In this embodiment, when the pressure switch 9 or the micro switch 10 is off, the AC power supply 1
Is zero.

(Embodiment 3) As shown in FIG. 3, the third input circuit 23 is connected from the output terminal of the pressure switch 9 to the resistor 7b of the first control circuit 7 via the photodiode 23a. . The collector and the emitter of the phototransistor 23b and the constant voltage diode 23 are connected between the plus terminal and the minus terminal of the power supply of the microcomputer 12a.
The cathode and the anode are connected in this order.

The fourth input circuit 24 is connected from the output terminal of the microswitch 10 to the resistor 8a of the second control circuit 8 via the photodiode 24a. Also,
The collector and emitter of the phototransistor 24b, the cathode of the constant voltage diode 24a, and the anode are connected in this order between the plus terminal and the minus terminal of the power supply of the microcomputer 12a. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The basic operation is the same as that of the first embodiment, and different points will be described. When the pressure switch 9 is closed, the current from the capacitor 5a of the DC rectifier circuit 5 flows from the resistor 7b to the base of the transistor 7a via the photodiode 23c, and the transistor 7a is turned on. At this time, the photocurrent flows simultaneously from the phototransistor 23b to the constant voltage diode 23a, and a high voltage is input to the microcomputer 12a. The same operation is performed for the microswitch 10 and the fourth input circuit 24.

In this embodiment, the microcomputer 12a
Can be implemented even when the power supply is not common with the AC power supply 1. It is clear that the configuration can be combined with the configuration of the second embodiment.

[0042]

As described above, according to the first aspect of the present invention, a float which is arranged in a washing tank and moves up and down according to the water level of the washing tank, a detection switch which turns on a contact by the float, A water supply device, a drainage device, a capacitor connected in series between AC power supply lines in the device, a resistor connected to one end of the capacitor, a DC rectifier circuit obtained from one end of the capacitor, A switch disposed on a power supply line, a first control circuit and a second control circuit for controlling a control terminal of the switch, a press-contact switch disposed between the DC rectifier circuit and the first control circuit, A second DC rectifier circuit formed between the AC power supply lines for the power supplies of the first and second control circuits, and a microcomputer which is supplied with power and starts operating when the switch is closed. A first input circuit for inputting a voltage in a circuit that changes by turning on and off the pressure switch to a microcomputer; and a second input circuit that inputs a voltage in the circuit that changes by turning on and off the detection switch to the microcomputer. An input circuit, an output circuit that reads the first or second input circuit voltage by the microcomputer and outputs an output for controlling the switch, and an abnormality notification device; and the DC rectifier circuit and a second control circuit. The detection switch is arranged in between, and when the switch is turned on, the microcomputer determines which of the first and second input circuits is turned on, and when the detection switch is turned on, the drainage device is driven. At the same time, drive the abnormality notification device and follow the microcomputer program when it is turned on by the pressure switch. A series of dishwashing steps are performed, and when the detection switch is turned on during the water supply step, it is determined that normal water supply has been performed, and since it has a function of determining a series of dishwashing steps and executing a program, water supply abnormality due to equipment failure when power is turned off. When it is detected, the drainage device is driven to prevent secondary damage or spread damage, and the effective power consumption can be reduced to a very small value or zero when the monitoring state and the power supply are turned off.

According to the second aspect of the present invention, there is provided a float disposed in the washing tank and moving up and down according to the water level of the washing tank, a detection switch for turning on the contact by the float, a water supply device, and a drainage device. A capacitor connected in series between AC power supply lines in the device, a switch arranged on the AC power supply line, a pressure switch connected to one output terminal of the capacitor, and one of the capacitors via the pressure switch. A resistor and a DC rectifier circuit connected between both terminals, a first control circuit disposed between the DC rectifier circuit output and the control terminal of the switch to control the control terminal of the switch, and via the detection switch A second resistor and a third DC rectifier circuit connected between one and both terminals of the capacitor; an output of the third DC rectifier circuit and a control terminal of the switch; A second control circuit disposed between the AC power supply lines for a power supply for the first and second control circuits; a second control circuit for controlling a control terminal of the switch; When the power supply is supplied to the device and the microcomputer starts operating,
A first input circuit for inputting a voltage in a circuit that changes by turning on and off the pressure contact switch to a microcomputer; a second input circuit for inputting a voltage in the circuit that changes by turning on and off the detection switch to the microcomputer; An output circuit that reads the first or second input circuit voltage by the microcomputer and outputs an output for controlling the switch; and an abnormality notification device, wherein the detection switch is connected to one output terminal of the capacitor. ,
When the switch is turned on, the microcomputer determines whether the microcomputer is turned on by the first or second input circuit. When the detection switch is turned on, the microcomputer drives the drainage device, and at the same time, drives the abnormality notification device, and press-connects When turned on by a switch, a series of dishwashing steps are executed in accordance with a microcomputer program, and when a detection switch is turned on in a water supply step, it is determined that normal water supply is performed. When a water supply abnormality is detected when the power supply is turned off due to a failure of the power supply, the drainage device is driven to prevent secondary damage or spread damage,
The effective power consumption can be set to zero.

According to the third aspect of the present invention, there is provided a float disposed in the washing tank and moving up and down according to the water level of the washing tank, a detection switch for turning on a contact by the float, a water supply device, and a drainage device. A capacitor connected in series between AC power supply lines in the equipment, and one of the capacitors
A resistor connected to two ends, a DC rectifier circuit obtained from one end of the capacitor, a switch disposed on an AC power supply line, a first control circuit and a second control circuit for controlling a control terminal of the switch. A pressure contact switch disposed between one output terminal of the capacitor and a first control circuit; and a second DC rectifier circuit formed between AC power supply lines for a power supply of the first and second control circuits. When,
When the switch is closed, power is supplied to the device to start operation, a microcomputer, a third input circuit for inputting a current in a circuit, which changes by turning on and off the press-contact switch, to the microcomputer, and a change by turning on and off the detection switch. A fourth input circuit for inputting a current in a circuit to be performed to a microcomputer, an output circuit for reading the third or fourth input circuit voltage by the microcomputer and outputting an output for controlling the switch, and an abnormality notification device Wherein the detection switch is arranged between one output terminal of the capacitor and a second control circuit, and when the switch is turned on, the microcomputer is turned on by either the third or fourth input circuit. When the detection switch is turned on, the drainage device is driven, and When the apparatus is driven and turned on by the pressure switch, a series of dishwashing steps are executed according to the microcomputer program, and when the detection switch is turned on in the water supply step, it is determined that normal water supply is performed, and a series of dishwashing steps is determined and the program is executed. Because it has a function, when it detects a water supply abnormality when the power is turned off due to equipment failure, it can drive the drainage device to prevent secondary damage or extended damage and to monitor the monitoring status without depending on the power supply configuration of the electronic circuit Also, when the power is turned off, the effective power consumption can be made extremely small or zero.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a dishwasher according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a dishwasher according to a second embodiment of the present invention.

FIG. 3 is a circuit diagram of a dishwasher according to a third embodiment of the present invention.

FIG. 4 is a circuit diagram of a conventional dishwasher.

[Explanation of symbols]

 Reference Signs List 1 AC power supply 2 First capacitor (capacitor) 3 Second capacitor (capacitor) 4 Resistance 5 DC rectifier circuit 6 Relay (switch) 7 First control circuit 8 Second control circuit 9 Pressure switch 10 Micro switch (detection) Switch) 11 second DC rectifier circuit 12a microcomputer 13 first input circuit 14 second input circuit 15 output circuit 16 abnormality notification device 17 cleaning tank 18 float 19 water supply device 20 drainage device

Claims (3)

[Claims] 1. A float arranged in a washing tank and moving up and down according to the water level of the washing tank, a detection switch for turning on a contact by the float, a water supply device, a drainage device, and an AC power supply line in the device in series. A connected capacitor, a resistor connected to one end of the capacitor, a DC rectifier circuit obtained from one end of the capacitor, a switch arranged on an AC power supply line, and a first terminal for controlling a control terminal of the switch. And a second control circuit, an insulation displacement switch disposed between the DC rectifier circuit and the first control circuit, and an AC power supply line for the power supply of the first and second control circuits. A second DC rectifier circuit, a microcomputer that is supplied with power to the device when the switch is closed and starts operating, and a microcomputer that changes when the pressure switch is turned on and off. A first input circuit for inputting a voltage in the circuit to the microcomputer, a second input circuit for inputting a voltage in the circuit which changes according to ON / OFF of the detection switch to the microcomputer, and the first or the second circuit by the microcomputer. An output circuit that reads an output of a second input circuit voltage and outputs an output for controlling the switch; and an abnormality notification device, wherein the detection switch is disposed between the DC rectifier circuit and a second control circuit, When the microcomputer is turned on, the microcomputer determines which of the first and second input circuits is turned on. When the detection switch is turned on, the microcomputer drives the drainage device, and simultaneously drives the abnormality notification device. When turned on, a series of dishwashing steps are performed according to the microcomputer program, and a detection Pitch is determined when turned to normal water supply, dishwasher having a function of executing the program determines that the set of dishwashing process. 2. A float arranged in a washing tank and moving up and down according to the water level of the washing tank, a detection switch for turning on a contact by the float, a water supply device, a drainage device, and an AC power supply line in the device in series. A connected capacitor, a switch arranged on an AC power supply line, a pressure contact switch connected to one output terminal of the capacitor, and a resistor and a DC rectifier circuit connected between one terminal of the capacitor via the pressure contact switch. And a first control circuit disposed between the output of the DC rectifier circuit and the control terminal of the switch for controlling the control terminal of the switch, and connected between one terminal of the capacitor via the detection switch. Second
A third DC rectifier circuit, a second control circuit disposed between the third DC rectifier circuit output and the control terminal of the switch, and controlling the control terminal of the switch; A second DC rectifier circuit created between the AC power supply lines for the power supply of the control circuit of No. 2, a microcomputer that is supplied with power to the device when the switch is closed and starts operating, and a circuit that changes by turning on and off the press-contact switch The first to input the voltage inside to the microcomputer
An input circuit, a second input circuit for inputting a voltage in the circuit that changes by turning on and off the detection switch to a microcomputer, and reading the first or second input circuit voltage by the microcomputer to switch the switch. An output circuit for outputting an output to be controlled, and an abnormality notifying device, wherein the detection switch is connected to one output terminal of the capacitor, and when the switch is turned on, the microcomputer turns on the first or second input circuit. When the detection switch is turned on, the drainage device is driven, and at the same time, the abnormality notification device is driven.When the pressure switch is turned on, a series of dishwashing steps are executed according to a microcomputer program, and the water supply is performed. When the detection switch is turned on during the process, normal water supply is determined and a series of dishwashing Dishwasher having a function of executing the program determines that. 3. A float arranged in the washing tank and moving up and down according to the water level of the washing tank, a detection switch for turning on a contact by the float, a water supply device, a drainage device, and an AC power supply line in the device in series. A connected capacitor, a resistor connected to one end of the capacitor, a DC rectifier circuit obtained from one end of the capacitor, a switch arranged on an AC power supply line, and a first terminal for controlling a control terminal of the switch. And a second control circuit, a press-contact switch disposed between one output terminal of the capacitor and the first control circuit, and an AC power supply line for supplying power to the first and second control circuits. A second DC rectifier circuit created from the above, a microcomputer that is supplied with electric power when the switch is closed and starts operating, A third input circuit for inputting a current in the circuit that changes more to the microcomputer, a fourth input circuit for inputting a current in the circuit that changes by turning on and off the detection switch to the microcomputer, and An output circuit for reading the third or fourth input circuit voltage and outputting an output for controlling the switch; and an abnormality notification device, wherein the detection switch is provided between one output terminal of the capacitor and a second control circuit. When the switch is turned on, it is determined whether the microcomputer is turned on by the third or fourth input circuit, and when the detection switch is turned on, the drainage device is driven, and at the same time, the abnormality notification device When the pressure switch is turned on, a series of dishwashing steps are performed according to the microcomputer program. And line, determines the detection switch is turned on in the water supply stroke and the normal water supply,
A dishwasher that has the function of executing a program as a series of dishwashing steps.