JP2698472B2 - Washing machine operation control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an operation control method for a washing machine, particularly during heavy washing.

[Conventional technology]

FIGS. 4 and 5 show an example of a stirring type fully automatic washing machine having an agitator. In the figure, (5) shows a vertically elongated hollow cylindrical body having a large number of through holes. Stirrer blade (5
a) as an agitator as a rotor provided radially, (4)
Is a washing and dewatering tub provided with a dehydration hole (28) in a side wall provided with the agitator (5) at the center. A water receiving tub (27) is disposed outside the washing and dehydration tub (4).

In the figure, (19) shows a motor arranged below the water receiving tank (27), which is connected to the rotation transmitting unit (34) via a small pulley (30), a V-belt (31) and a large pulley (32). connect. The rotation transmitting portion (34) has a double drive shaft (35) (36) switched by a spring clutch mechanism (38), and the outer drive shaft (35) is connected to the washing and spin-drying tub (4). The drive shaft (35) is connected to the washing and dewatering tub (4), and the inner drive shaft (36) is connected to the agitator (5).

A motor rotation detection circuit (15) having a speed generator (26) composed of a coil and an electromagnet as means for detecting the rotation of the motor (19) is provided on the non-load side of the motor (19) (FIGS. 4 and 5). (Not shown in the figure).

These mechanisms are housed in an outer box (1) via a rod-vibrating means such as a hanging bar provided with an anti-vibration spring, and an operation panel (3) is provided on the upper surface of the outer box (1). The upper part of the upper opening of the dewatering tank (4) is covered with a lid (2).

In the figure, (29) is a balancer attached to the upper edge of the washing and dewatering tub (4), (6) is a drain hose, (7) is a power cord,
(8) indicates a ground wire.

FIG. 6 shows the control circuit of the washing machine. The drive circuit of the motor (19) and the water supply valve (20) are connected in parallel to the power supply (18) of AC100V, and the torque motor (21) and The constant voltage power supply circuit (22) is connected.

In the figure, (9) is a microcomputer-based control device, which is connected to an AC 100V power supply (18) via the AC clock circuit (17) serving as a power failure detection circuit and the constant voltage power supply circuit (22). Oscillator circuit (10), clock oscillator circuit (11), reset circuit (12),
Operation switch (14) provided on operation panel (3), motor rotation detection circuit (15) having speed generator (26), lid switch (16) for detecting opening and closing of lid (2), water level sensor (23) Is connected.

On the other hand, the output terminal of the control device (9) has a
The LED (light emitting diode) lamp (13b), the IC circuit (25) (37) of the other LED lamp (13a), and the external component drive circuit (24) are connected.

Next, a description will be given of the operation in which strong washing is performed. In the strong washing, the energizing angle (time) of the agitator (5) is set to be larger and the stop time is set to be shorter than that of the standard washing. It is intended to obtain a strong water flow by increasing the mechanical power to be given, and to obtain a high cleaning ability,
This will be described with reference to the flowchart shown in FIG.

First, the laundry and a certain amount of detergent are put into the washing and dewatering tub (4), and the operation is started by operating the operation switch (14). First, the water supply valve (20) is opened, and water is supplied to the water receiving tub. (27) and the washing and dewatering tub (4), when the water is supplied to a certain level by the output from the water level sensor (23), the water supply is stopped, and the motor (19) is output by the output from the control device (9). ), The motor control process starts to perform a forward / reverse operation with a period of time during which the power is stopped during the step (a).

The forward / reverse operation of this motor (19) is controlled by a small pulley (3
0), V-belt (31), large pulley (32), rotation transmitting part (34), and transmitted to agitator (5) via drive shaft (36), and agitator (5) swings to wash laundry. Stir and wash.

When the motor (19) rotates, the speed generator (26) also rotates, and the voltage generated by the speed generator, which is a sine waveform output from the coil, is a 5V rectangular wave shaped voltage by the motor rotation detection circuit (15). And is introduced into the control device (9).

FIG. 8 shows the relationship between the movement of the motor (19) and the pulses generated by the speed generator (26). The number of pulses from the speed generator (26) (pulse generator: PG) is one.
It is determined that the motor (19) has made one revolution with the six motors.

Therefore, in the case of heavy washing, the number of revolutions in one energizing time of the motor (19) is set to, for example, 8 revolutions, which is larger than that in the case of the standard washing, and the speed generator (26) is controlled by the control device (9). The number of pulses output to the motor (19) 8
When 129 rotations are detected, the control device (9) determines that the motor (19) has rotated eight times (step B), and stops energizing the motor (19) (step d).

Even after the power supply to the motor (19) is stopped, the agitator (5) and the motor (19) continue to rotate by inertia, and the speed generator (26) also emits pulses due to the inertia as shown in FIG.

Under the condition that the power supply to the motor (19) is stopped (step a), the control device (9) starts counting the inertial pulses. As shown in the waveform diagram of FIG.
When the number of pulses has been counted (Step E, F), the stop determination time and the inertial pulse count up to that point are cleared (Step T), and then it is determined whether the stop determination time has reached 180 msec (Step E). This 180 msec is a stop time shorter than that in the standard washing, and is set as that in the strong washing.

Then, it is determined that the rotation by the inertia of the agitator (5) has also stopped by stopping the motor for 180 msec, and the motor (19) is rotated in the opposite direction to the previous rotation (step,
Li, Nu).

In this way, the motor (19) is energized for eight rotations, and then the energization is stopped. After the energization is stopped, 16 inertia pulses are generated, and after a stop time of 180 msec, the motor (19) is again turned in the opposite direction. Power is applied and repeated washing is performed for strong washing, but before the motor (19) rotates 8 times (step ro), the power supply time to the motor (19) is 600mse.
Also when the power reaches c (step f), the power supply to the motor (19) is stopped.

[Problems to be solved by the invention]

As described above, in the powerful washing, the energizing angle (time) to the motor is set to be large (for example, 8 rotations or 600 msec) and the stop time is set to be short (for example, 180 msec). 5-8 of the maximum capacity of the washing and dewatering tub taking into account the bath ratio to obtain a high degree of washing
It is set uniformly, assuming the amount of laundry below about a percentage.

For this reason, if the washing is carried out intensely with the amount of the laundry up to the maximum capacity, the load on the motor is increased, which is not preferable in terms of safety, and the degree of washing is reduced.

When the power supply voltage is low, the amount of laundry is reduced to the maximum capacity of 5%.
Even if it is less than about 80%, a predetermined degree of cleaning may not be obtained.

On the contrary, when the amount of laundry is extremely small, this ability is not effectively utilized even though there is an ability to wash a large amount of laundry strongly. Is not good.

An object of the present invention is to solve the above-described disadvantages of the conventional example, and when performing heavy washing, taking into consideration the quality and quantity of the laundry, the level of the power supply voltage, and the like, and energizing the motor according to the time. Another object of the present invention is to provide a washing machine operation control method that can rotate an agitator for a short time and a stop time, and can effectively use the output of a motor.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a washing machine in which agitating blades are alternately rotated forward and backward at a specified number of rotations and a specified time to perform a strong washing, wherein a rotation number detecting means of a drive motor is provided, When the number of rotations has not reached the specified number of rotations within the specified time set for washing reaches the predetermined number of times, it is determined that the load of the laundry is large, and the specified number of rotations and the specified time when the drive motor is energized are determined. Is set smaller than the previous time, and the motor stop time is set to be longer, so that the motor rotation speed, the energization time, and the stop time appropriate for the load of the laundry are automatically set.

[Action]

According to the present invention, the number of such cases is measured when the set rotation speed motor does not rotate within the specified time set for strong washing when the motor is energized, and the number of such cases is measured. When the number of times is reached, it is determined that the laundry load rise is large, and the specified rotation speed and specified power supply time of the motor when the motor is energized are smaller than the previous time,
In addition, set the stop time to a large value, re-energize the motor again, and repeat this multiple times to obtain the appropriate motor rotation speed, energizing time and stop-on time for the load of the laundry, and maximize the motor output Driving is available. This enables efficient and powerful washing.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a flowchart showing the operation of an embodiment of a method for controlling the operation of an agitation type washing machine according to the present invention. FIG. Since FIG. 6 to FIG. 6 are the same as those already described, detailed description here is omitted.

A description will be given of a method of controlling the operation of washing using the washing machine, in particular, the strong washing. Seven modes for overload detection are preset in the control device (9) as shown in the following table. deep.

These seven modes are set so that each time the number of detections is counted one, the motor rotation speed when the motor is energized is small, the motor longest operation time is short, and the motor stop judgment time is long, and the first is powerful. As for washing, the number of revolutions is set to a maximum of, for example, eight times so that the energizing angle of the agitator (5) is larger than that in the standard washing, the motor is operated for a maximum of 600 msec, and the stop time is shortened to a minimum of 180 msec. Set to.

To start heavy washing, first put the laundry and a certain amount of detergent into the washing and dewatering tub (4), and operate the operation switch (1).
When the operation is started by operating 4), first, the water supply valve (20)
Is opened, water is poured into the water receiving tank (27) and the washing and dewatering tank (4), and when water is supplied to a certain level by the output of the water level sensor (23), the water supply is stopped and the control device (9) The motor (19) is energized by the output (stepping), and the motor control process by the forward / reverse operation starts.

The forward / reverse operation of this motor (19) is controlled by a small pulley (3
0), V-belt (31), large pulley (32), rotation transmitting part (34), and transmitted to agitator (5) via drive shaft (36), and agitator (5) swings to wash laundry. Stir and wash.

When the motor (19) rotates, the speed generator (26) also rotates, and the voltage generated by the speed generator, which is a sine waveform output from the coil, is a 5V rectangular wave shaped voltage by the motor rotation detection circuit (15). And output to the control device (9).

This speed generator (26) (pulse generator: PG)
It is determined that the motor (19) has made one rotation with 16 pulses from the controller, and the controller (9) first determines whether the motor (19) has rotated the specified number of times eight times according to the first setting mode. Judge by counting the number.

Then, when the motor rotates eight times (steps I, W, and I), which is the specified number of revolutions, within the motor maximum operation time of 600 msec, which is the specified time of the first mode (steps I, W, and I), the power supply to the motor (19) is stopped (step S).

Even after the power supply to the motor (19) is stopped, the washing and dewatering tub (4) and the motor (19) continue to rotate by inertia and emit an inertia pulse.

Under the condition that the power supply to the motor (19) is stopped (stepping), the controller (9) starts counting the inertial pulses. When the inertial pulses for 16 pulses have been counted (steps), the stop determination up to that point is performed. Clear the time and inertia pulse counts (Stepne), then the shortest 180mse, which is the stop judgment time, which is the specified time for the first mode
Count the inertial pulse until it reaches c (stepsaw), 1
After the determination stop time of 80 msec has elapsed, the motor (19) is energized in the direction opposite to the previous energization direction to the motor (19) (steps, la, mu).

This first mode is suitable for the load of the laundry because the motor (19) is turned on in the opposite direction by the specified number of revolutions within the specified time at the previous energization. Judgment is made in the same mode as the first mode, and this is repeated.

However, when the motor is energized, the specified motor maximum operating time (600 mse
c) has elapsed (steps I, W, and F)
At this time, the power supply to the motor (19) is stopped (step), and after the specified motor stop determination time (180 msec) elapses as described above, the power supply to the motor (19) is performed in the opposite direction.

When the specified motor maximum operation time (600 msec) elapses before reaching the specified number of revolutions (8 times) and reaches the fourth time (step F), it is determined that the load is large. Then, as shown in FIGS. 2 and 3, this time, the motor mode is set to the second mode, the motor speed is reduced to 7.5 times, the motor maximum operation time is shortened to 570 msec, and the motor stop judgment time is set to 190 msec. And the number of times of overload detection is counted by one (step ta).

In this way, if the specified motor maximum operation time elapses before the motor speed reaches the specified speed, the operation is performed in a mode appropriate for the load of the laundry by sequentially changing the mode. Control. And
This mode change operation is repeated a plurality of times, six times in this embodiment because seven modes are set (step y), and when the sixth time is reached, the power supply to the motor (9) is stopped and the process ends.

〔The invention's effect〕

As described above, the operation control method of the washing machine of the present invention
When performing heavy-duty washing, the energizing angle (time) and stop time can be automatically set according to the quality and quantity of the laundry, so that the specified washing performance can be ensured and the motor output can be used as efficiently as possible to operate. The efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a flowchart of an operation showing an embodiment of a method for controlling the operation of a stirring type washing machine according to the present invention, FIG. 2 is a waveform diagram when the motor is turned on, FIG.
FIG. 5 is an external perspective view of a stirring type fully automatic washing machine, FIG. 5 is a vertical sectional side view of the same, FIG. 6 is a control circuit diagram of the same, FIG. 7 is a flowchart showing a conventional example of an operation control method, and FIG. FIG. 9 is a waveform diagram when the power supply to the motor is stopped, and FIG. (1) ... outer box, (2) ... lid (3) ... operation panel, (4) ... washing and dewatering tank (5) ... agitator, (5a) ... stirring blade (6) ... Drain hose, (7) Power cord (8) Ground wire, (9) Controller (10) Oscillator, (11) Oscillator for clock (12) Reset circuit ( 13a) LED (light-emitting diode) lamp (13b) LED display for character display (14) Operation switch (15) Motor rotation detection circuit (16) Lid switch (17) … AC clock circuit (18)… AC100V power supply (19)… Motor, (20)… Water supply valve (21)… Torque motor, (22)… Constant voltage power supply circuit (23)… Water level sensor, (24) ... External parts drive circuit (25) (37) ... IC circuit for LED display (26) ... Speed generator, (27) ... Water receiving tank (28) ... Dehydration hole, ( 29) Balancer (30) Small pulley (31) V-belt (32) Large pulley (33) Spring clutch mechanism (34) Rotation transmission unit (35) (36) ) ... Drive shaft

Claims (1)

(57) [Claims] 1. A washing machine in which agitating blades are alternately rotated forward and backward at a prescribed rotation speed and a prescribed time to carry out strong washing, a rotation speed detection means of a drive motor is provided, and the washing motor is set for heavy washing when power is supplied to the motor. If the number of rotations has not reached the specified number of rotations within the specified time, the load of the laundry is determined to be large, and the specified number of rotations and specified time when the drive motor is energized are reduced from the previous time. A method for controlling the operation of a washing machine, wherein the motor stop time is set to a large value, and the number of rotations of the motor, the energizing time and the stop time are automatically set appropriately for the load of the laundry.