JPS60119990A - Electric washer - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to improvements in electric washing machines, and particularly to power control of electric washing machines.

<Prior art> Conventionally, the control device line of this type of washing machine, for example,
As disclosed in Japanese Patent No. 161098, etc., a washing machine is provided with a switch for turning the power on and off, and when this power switch is turned on, even after a series of washing operations by operating the operation switch is completed. Unless the power switch is turned off, the power supply to the control circuit remains continuously energized.

In such a configuration, the power switch remains on even after the washing operation is completed, so the power switch is turned off and the operation is restarted easily due to children's mischief, power supply noise, etc. Sometimes. To prevent this, it is necessary to turn off the power switch after completing a series of washing operations by operating the operation switch, but the reality is that this operation of turning off the power switch is not always performed reliably.

<Summary of the Invention> The present invention has been made in view of the above-mentioned drawbacks of the conventional art, and is intended to solve the above problems. Furthermore, by providing a control means for turning off the power switch, the present invention aims to provide a highly safe electric washing machine.

<Embodiment of the Invention> Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

In Fig. 1, 1 is a commercial power supply for the electric washing machine, 2 is a power switch with a normally open contact structure that closes only when pressed, 3 is a power supply circuit that supplies DC power to a control circuit block 4, and 5 is a power supply switch for this washing machine. An operation switch signal reading circuit equipped with an operation switch is connected to a microcomputer 1 (described later) that performs digital arithmetic processing according to a predetermined program, and enables switching of operation modes. Reference numeral 6 denotes a sensor input circuit necessary for controlling the washing machine, such as a sensor such as a Hall element, which is connected to the microcomputer T and reads data such as rotation angle.

The microcomputer 7 sends motor operation control signals to a motor operating circuit 8 made up of bidirectional control rectifiers, etc. according to a predetermined program, and sends power control signals to a motor movement circuit 9 made up of relays etc. is sent to the power supply control circuit. Further, the motor drive circuit 8 controls the motor to turn on and off, and controls forward and reverse rotation, and the power supply control circuit 9 controls a relay contact 91 connected in parallel with the power switch 2 to turn on and off. Note that 1o is a washing motor.

Next, the operation will be explained based on FIGS. 2 and 3. 2 is a flowchart showing the overall processing operation of the microcomputer T according to the program, and FIG. 3 is a flowchart showing details of the power supply processing routine included in the operation processing routine in FIG. 2.

First, when the power switch 2 is turned on to turn on the power, the microcomputer T is activated and performs various processes according to the flowchart shown in FIG. 2 to control the washing machine.

That is, when the power is turned on, arithmetic processing is started at a start step 100, and the process proceeds to a RAM clear routine 200, where the memory (R
AM) Clear all contents.

Next, the process proceeds to switch I-inclusive processing routine 300, where the state of the operation switch is input and the operating mode and operating time are determined. Next, a sensor reading processing routine 400 reads the sensor input of the rotation angle necessary for controlling the motor, and a timer count processing routine 500 reads the sensor input of the rotation angle necessary for controlling the motor.
The timer data set at 00 is decremented every time a predetermined reference time elapses, and when the timer data reaches 0, a timer flag (T
Reset F). Furthermore, operation control processing routine 6
In step 00, the output state of each output device of the washing machine is determined based on the switch state, sensor signal state, and timer state input in the switch reading processing routine 300 and the sensor reading processing routine 400. Then, in an output routine 700, an output signal is generated on the output port p to control each device.

Thereafter, in the same way, the switch reading processing routine 300 to the output routine 700 are repeatedly executed to control the output corresponding to the input state according to a predetermined program.
The details of the power processing control section of No. 0 will be explained in detail based on FIG. 3. While the washing machine is powered on, the power processing control section shown in FIG. 3 is always passed through. First, in step 601 shown in the figure, it is determined whether the operation flag (Fop) (this is set to "1" when the operation switch is operated and the washing machine is in the washing operation) is set, and if Fop = 1. If so, the process moves to the next processing routine 610, and if Fop=0, the process moves to step 602. In this step 602, it is determined whether or not a stop time elapsed flag FT is set, which is set to "1" when the stop time (time of p Op == Q) passes a set time M (for example, 5 minutes). death,
If FT=O, proceed to step 610 as described above.
If FT=1, the process moves to step 603, where the power stop flag Fstop is set to "1" and step 61
Move to 0.

Furthermore, in the output processing routine, if Fop = 1, the washing motor is controlled to perform the washing operation, and Fop = 1.
0"?'4 If FT = 0, the machine will continue to wait for the operation switch to be operated until the stop time elapsed flag is set, and if the operation switch is operated during that time, the normal washing operation will be performed. Only when the operation switch is not operated, the power supply stop flag is set, and the power supply stop circuit 9 deenergizes the relay contact 9'.

For this reason, the power to the washing machine is automatically turned off when the operating switch is not operated, making it highly safe without having to provide a special power-off switch to the washing machine. .

<Effects of the Invention> As explained above, according to the present invention, if the operation switch is not operated even after a predetermined period of time has elapsed after two or a series of washing operations have been completed after turning on the power switch,
Since a control means for automatically turning off the power switch is provided, it is possible to prevent accidental restart due to children's mischief, power supply noise, etc., and it is possible to provide a washing machine with excellent safety.

[Brief explanation of the drawing]

The drawings show one embodiment of a control circuit for a washing machine according to the present invention, in which FIG. 1 is a block diagram of the main parts, FIG. 2 is a flowchart of arithmetic processing by a control program of a microcomputer, and FIG. It is a flowchart of power-off control of the operation control process routine in a figure. 2... Power switch 3... Power supply circuit 4... Control circuit block 5... Operation switch signal reading circuit
6... Sensor input circuit T... Microcomputer 8... Motor drive circuit 9... Power supply control circuit 10... Motor representative Masuo Oiwa (and 2 others)

Claims (1)

[Claims] An electric washing machine comprising a power switch for a main body of the washing machine and an operation switch for selectively executing a washing program, wherein the power switch is automatically turned off when the operation switch is turned off even after a washing counting time set by the operation switch has elapsed. An electric washing machine characterized by being provided with a control means for turning off.