JPS618094A - Operation control system of electric washer - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an operation control system for an electric washing machine, and particularly to a rotation control system for its rotor blades.

[Prior art]

Conventionally, this type of device is disclosed in Japanese Utility Model Application Publication No. 56-69286, etc., which detects the number of revolutions of the rotary blades of a washing machine, counts the number of revolutions, and every time the counted value reaches a predetermined value, There were methods such as reversing the rotation direction of the rotor blades.

However, with this method, there are cases where the number of revolutions cannot be counted due to failure of the rotation sensor or counting device, or locking of the rotary blade motor due to overload of the washing machine.

It has the disadvantage that the direction of rotation does not reverse for any length of time, and that power continues to be supplied to the motor with an overload, which may cause the motor to burn out.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones, and it counts the number of inertial rotations from the end of energization to the motor until the motor stops, and determines the magnitude of the load based on the number of rotations. The purpose of the present invention is to provide a highly safe operation control method for an electric washing machine that can perform detailed control according to the size of the load by determining the energization time.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

In the figure, (υ is the commercial power supply, (2) is the power switch, (
3) is a control DC power supply circuit, (4) is an operation switch signal reading circuit equipped with a washing machine operation switch, (5) is a washing machine rotary blade drive motor, and (6) is a circuit that controls the rotation of the motor using a Hall element, etc. A rotation sensor (6
1), a sensor input circuit including a commercial power supply (!) zero phase detection sensor (62), etc., and (7) a microcomputer (hereinafter referred to as microcomputer) that performs seven digital arithmetic operations according to a predetermined program.

(8) is a motor drive circuit consisting of a triac, etc. that controls the opening and closing of the motor (5) according to the operation signal and stop signal from the microcomputer (7), and (9) is a timer display signal such as remaining operation time using a light emitting diode, etc. A display circuit for displaying, a
α to αe are each means executed by the microcomputer (7) according to a built-in program, and (1) is the initial power supply time T to the monitor (5) when the washing machine starts operating. Setting means, t
iυ is an inertial rotation number counting means that counts the number of pulses from the end of energization to the motor (5) until the motor stops, and α2 is a predetermined time T1 after the initial energization ends and the motor stops. α3 is a motor energization time setting means that sets the motor energization time T2 for the second and subsequent times; (I4 is a rotation direction switching means that switches the rotation direction of the rotor blade and energizes the motor) , a is a rotation detection means that detects the presence or absence of a pulse from the rotation sensor (61) every set time T3 of the motor energization middle part 1, Q61 is a rotation detection means that detects the presence or absence of a pulse from the rotation sensor (61) in response to the detection of the absence of a pulse by this means a!9. 5) for a second set time T4.

The operation will be explained below with reference to FIGS. 2 and 3. FIG. 2 is a flowchart showing the basic operation of the microcomputer (7), and FIG. 3 is a flowchart showing the operation of the operation control process of the motor (5) according to the present invention.

First, the power switch (2) is turned on and the DC power circuit (3)
When turned on, the microcomputer (7) operates, and the washing machine is controlled by performing various processes according to the flowchart shown in FIG.

That is, when the power switch (2) is turned on, the arithmetic processing starts from the start step aη, and the RAM clear routine (
Proceeding to step 119, all contents of the memory (RAM) that temporarily stores data related to arithmetic processing are cleared.

Next, the switch reading processing routine proceeds and the signal from the operation switch signal reading circuit (4) is input.

The operating mode and operating time are determined from the state of the operation switch. Next, in the sensor reading processing routine ■, 8 senna input times! 3 Read the pulses corresponding to the motor rotation from the rotation sensor (61) of +61 and the zero phase signal from the zero phase detection sensor (62), and set them in the timer count processing routine I211 and the operation control processing routine @. The timer data is decremented every time a predetermined reference time elapses, and when the timer data reaches zero, a timer flag (TF) indicating a timer count up is reset. Furthermore, in the operation control routine I22, the outputs of each output device of the laundry (number of outputs) are determined based on the switch state inputted in the switch reading processing routine I and the sensor reading processing routine 1, the sensor signal state, and the timer state. The state is determined.Then, in the output routine (c), output signals are generated as determined in the above routine (company) to control each device.Thereafter, in the same manner, output signals are generated from the switch reading processing routine a1. The routine up to c2J is repeatedly executed, and the output corresponding to the input state is controlled according to a predetermined program.

Next, the motor operation control operation in the above operation control routine (2) will be explained with reference to the flowcharts shown in FIGS. 3A and 3S. FIG. 3a shows a flowchart of the entire motor operation control, and FIG.
and a flowchart showing only a stop determination step corresponding to the forced stop means σQ. Condition 70' While the power is turned on to the Z machine, the steps shown in FIG. 3a and b are always passed through.

First, the first night, the step corresponding to the setting method Q (1
00) to (103), the washing operation is determined and the first motor coupling is performed, and the step (110) corresponding to the inertial rotation speed measuring means 11υ (Fig. 3b (111) to (1'17)
, (161)), the load amount of the washing machine is determined, and steps (121) to (1) corresponding to the initial energization stop means are executed.
22), after the first energization, the motor is stopped for a period of T, and step (1) corresponding to the motor energization time setting means a3 is performed.
In steps 51) to (135), the second and subsequent motor energization times are set according to the load amount, and in steps (141) to (145) corresponding to the one rotation direction switching means I, the motor is rotated in the normal direction.
The reverse rotation is determined, and in steps (151) to (157) corresponding to the double rotation detection means α, overload of the motor during washing and failure of the motor rotation speed detection means are detected, and the inertial rotation speed measurement means is again detected. (11) , and forced stop means α
In step (17) corresponding to e, washing operation determination (third
1b (111) to (117)), and the motor is de-energized for a set time T4 upon detection of a failure in the motor overload one rotation sensor (61).
162)) Finally, in step (180)', it is determined that the washing time has ended. Hereinafter, steps (131) to (17) are repeatedly executed.

Next, the operation of each step will be explained in detail. step (,100
), when the operation switch is operated and the settling time is set, it is determined whether the washing flag F, which is set to "1" until the washing time ends, is set, and if y8 = 0, this motor operation control is performed. The process passes through routine / and proceeds to the primary processing routine. If F8=1, proceed to the next step (step 10) and set the initial washing motor energization time T to, for example, 0.15 seconds, and reset both the motor forward rotation flag FM and the overload flag Fx to "0". .Then step (
Proceed to step 102), output a motor forward rotation signal, and proceed to step (
In step 103), the initial energization time T set in step (101) is determined.

Timer flag FT that is set when the count is up
It is determined that O is set to "1", and T.

Outputs a time forward rotation signal. Next, the process proceeds to step (110) (FIG. 3b (Hl) to (117) and (161)), where a stop determination, which will be described later, is made, and the process proceeds to step (121). In step (121), the initial stop time T is set to 02, for example.
seconds, step (,122), step (1
As in 05), it continues to stop for T1 time. Next step (1
Proceeding to steps 31) to (135), the next motor energization time is set in accordance with the load amount depending on the magnitude of the inertia pulse number P at the time of stop determination. That is, in step (151) P=
0, that is, in the case of an overload or a failure of the one-rotation sensor, proceed to step (152) and set the motor 1 energization time T.
2 to 0.2 seconds, for example. Also, step (1
If P=0 in 31), proceed to step (133) and determine, for example, P≦3, and if 3 or less, determine that there is a double load, proceed to step (134), and set T2 to, for example, 0.4 seconds. . If cp>s in step (153), it is determined that the load is light, and in step (135) T2 is set to, for example, 03 seconds.

Next, proceed to steps (14Q to (145)) to determine whether the motor rotates forward or reverse, and output the output.

In step (14), the motor forward rotation flag FM is determined, and if it is FM-1, proceed to step (142).

At the same time as resetting FM to "0", proceed to (143) and output a normal rotation signal. Also, if it is FM-0 in step (141), proceed to step (144) and set FM to "1".
At the same time, the process proceeds to step (145) and outputs a reverse rotation signal.

Next, the process proceeds to steps (151) to (157), where overload determination is performed. °In other words, in step (151), the overload judgment time T3 is set to, for example, 015 seconds, and in step (i5
In step 2), the timer flag FT2, which is set in steps (131) to (135) and is set when the motor energization time has elapsed, is determined. If the timer flag FT2 is not set, the process proceeds to step (155). The process advances to step (154) to read the output pulse of the % rotation sensor (61), which is output once per rotation. Step (15
In 4), it is determined whether a pulse has been read, and if it has been read, the process proceeds to step (i55), resets the motor overload flag FK to "0", and returns to step (151) to reset T5. If no pulse has been read in step (154), the process proceeds to step (156), and is set when the overload determination time T3 has elapsed. Determine whether the flag FT3 is set, and if it is set, proceed to step (15υ) and set the motor overload flag Fx.
is set to "1" and the process proceeds to step (170). If the motor energization time flag FT2 is set in step (152), the process similarly proceeds to step (170).

In steps (110) and (170), as shown in FIG.
Further, the overload stop time T4 is set to, for example, 4 seconds. Next, in step (115), the stop judgment time T5 is set to 01.
5 seconds, and in step (114) read the output pulse of the rotation sensor (61) of the motor, and in step (1
Proceed to step 15). In step (115).

Determine whether the pulse has been read and if it has been read.

Proceed to step (ii6), add 1 to the inertial pulse number P, return to step (111), and reset T5.

If the pulse is not read in step (115), the process proceeds to step (117), and it is determined whether or not the timer flag FT5, which is set when the stop determination time T5 has elapsed, is set. If not set, step (1
Step 2 or proceed to step (180).

If it is set, the process proceeds to step (162), and the timer flag F T 4, which is set when the overload stop time T4 has elapsed, waits until it is set, and if it is set, the process proceeds to step (180). In addition, if the upper i FT5 is not sent in step (117), step (117) is performed.
114) Also take K and continue to determine whether a pulse has been read during the stop determination time.

In step (180), a timer flag F8, which is reset when the washing time has elapsed, is determined.

If it is set, return to step (131).

Continue washing. If it has been reset, the washing ends and the process proceeds to the first processing routine.

As described above, when the motor (5) is energized for the first time, T is relatively short. Since the load amount is determined based on the stop determination after energization, even if the energization is performed in a no-load state, the rotor blade will rotate only about one revolution and no problem will occur. Further, since a forced stop time T is provided after the initial stop determination, even if the rotation sensor is malfunctioning, the rotation sensor will not immediately reverse, thereby preventing danger.

In addition, during normal washing, when the load changes due to laundry being somewhat entangled, etc., the motor's energization time and stop time are automatically controlled by the inertial rotation pulse number P, and in the case of overload, the energization time is shortened and the motor is stopped. By lengthening the time, abnormal heating of the motor can be prevented. Further, by forcibly stopping the motor for a long time with the rotation sensor output being 0 when the motor is energized, it becomes easier for the user to discover abnormalities.

FIG. 4 is a time chart showing the phase relationship between the commercial power source fi+ and power stoppage to the one-rotation sensor (61) and motor (5). The figure is a time chart when a 4-pole motor is used as the motor (5) and a 2-pole sensor is used as the rotation sensor (61). . Therefore, the time from one energization stop to the output of the rotation sensor (61) can be set short, and overload or failure of the rotation sensor (61) can be accurately detected.

In the above explanation, each setting time T. -T5 and the number of determination pulses P have been explained using specific values, but these are merely examples, and it goes without saying that the present invention is not necessarily limited to these values.

〔Effect of the invention〕

As described above, the present invention detects the inertial rotational speed of the motor from the end of energization to the time when the motor stops.

Since the energization time of the next motor is set accordingly, the energization time can be changed depending on the load condition of the washing machine, making it possible to fine-grained control according to the size of the load, improving safety. This has the effect of providing a highly efficient operation control system for electric washing machines.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention. FIG. 2 is a flowchart showing the basic operation of the microcomputer in this embodiment, and FIG. 3 is a flowchart showing the motor operation control processing operation according to the present invention. FIG. 4 shows a conventional method and a method according to an embodiment of the present invention. 5 is a time chart showing a phase relationship among a commercial power supply voltage, a current supplied to the motor, and a rotation sensor output signal. In the figure, Fi+ is a commercial power source, (5) is a washing machine rotary blade drive motor, (6) is a sensor input circuit, (6i) is a rotation sensor which is a motor rotation speed detection means, (7) is a microcomputer, (8) is the motor, electric circuit, a0 is the motor initial energization time 5 setting means, aI) is the inertial rotation speed measuring means, α2 is the initial energization stopping means, (13 is the motor energization time setting means, and a is whether or not it rotates. The detection means, Qυ, is a forced stop means. The same reference numerals in the figures indicate the same or corresponding parts. Agent Masu Oiwa 11 (and 2 others) Figure 1 Figure 2 Figure 3 (L) Figure 3 (b)

Claims (4)

[Claims] (1) In an operation control system for an electric washing machine in which the rotary blades are automatically reverse-controlled by a motor, a motor rotation speed detection means detects the rotation of the motor and outputs a number of pulses corresponding to the rotation speed; an inertial rotational speed measuring means for measuring the number of pulses from the rotational speed detecting means from the end of energization until the motor stops; and one of the plurality of set times is selected according to the number of pulses measured by this means. , an operation control method for an electric washing machine, characterized in that it is provided with a motor energization time setting means for setting a energization time T_2 to the next motor. (2) Rotation detection means for detecting the presence or absence of an output pulse from the rotation speed detection means every first set time T_3 while the motor is energized; An operation control system for an electric washing machine according to claim 1, further comprising a forced stop means for stopping energization for a second set time T_4. (3) Time for energizing the motor when the washing machine starts operating for the first time T_
an initial energization time setting means for setting 0 to a predetermined value shorter than any of the following motor energization times T_2, and an initial energization stopping means for further stopping energization to the motor for a predetermined time T_1 after the initial energization is completed and the motor is stopped. An operation control system for an electric washing machine according to claim 1 or 2, which comprises: (4) The power supply stop phase of the motor is set to the zero phase of the power supply voltage immediately before the output pulse phase of the rotation speed detection means, as set forth in claim 1, 2, or 3. Operation control method for electric washing machines.