JP3239392B2 - Fully automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine capable of performing a scheduled washing operation in which the amount of cloth is determined before water is supplied to a washing and dewatering tub.

[0002]

2. Description of the Related Art In recent years, the mainstream of automatic washing machines that determine the amount of cloth in a washing and spin-drying tub and automatically set a water supply level, a water flow, a washing time, and the like according to the amount of cloth has become mainstream. .

Conventionally, a fully automatic washing machine of this type drives a pulsator on and off a plurality of times after water is supplied to a washing / dewatering tub up to a predetermined water level, and the number of revolutions of the motor is controlled by the back electromotive force of the motor when the pulsator is off. Detect and judge the amount of cloth in the washing and dewatering tub,
The water level, water flow, washing time, etc., are automatically set according to the amount of cloth.When the reserved washing operation is set, the amount of cloth is not determined, and the reserved operation start time is also when the amount of cloth is the largest. Was set based on the driving time.

[0004]

In such a conventional fully automatic washing machine, the amount of cloth has not been determined at the time of setting the reserved washing operation, so that the detergent must be supplied by the user's intuition.
There was a problem that a detergent suitable for the amount of cloth could not be added. In addition, the operation start time of the reserved washing is also set based on the operation time when the cloth amount is the largest, and when the cloth amount is small, the reserved washing operation ends much earlier than the reserved time,
There is a problem that the clothes are wrinkled because they are left dehydrated.

The present invention has been made to solve the above-mentioned problem, and it is possible to judge a cloth amount in a short time without supplying water to a washing and dewatering tub at the time of setting a reserved washing operation, and to supply a detergent according to the cloth amount. Further, an object of the present invention is to prevent the wrinkles caused by leaving the clothes dehydrated by setting the operation start time of the reserved washing according to the amount of the clothes.

[0006]

In order to achieve the above object, the present invention provides a motor for driving a pulsator rotatably disposed on the bottom of a washing and dewatering tub, and a cloth amount in the washing and dewatering tub. Cloth determining means for determining the amount of water, a control means for controlling the driving of the motor, a display means for displaying the water level and detergent amount , and a time measuring means for measuring the time, the control means, the scheduled washing operation setting The problem solving means is to determine a cloth amount at times, display a detergent amount and a water level based on the determined cloth amount, and set a start time of a reserved washing operation according to the cloth amount.

[0007]

According to the present invention, since the amount of cloth can be accurately determined in a short time without supplying water to the washing and dewatering tub, the amount of cloth can be determined without leaving time immediately after setting the scheduled washing operation. Judgment can be made, a detergent corresponding to the amount of cloth can be added, and scheduled washing can be performed according to the amount of cloth.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, a washing and dewatering tub 1 has a pulsator 2 rotatably disposed at a central bottom. The water tub 3 contains the washing and dewatering tub 1 and the substrate 4 is fixed to the outer bottom, and a motor 5, a drain valve 6, a washing and dewatering switching mechanism 7, and the like are provided. The outer edge of the substrate 4 is suspended from the upper corner of the outer frame 10 via a vibration isolator 8 and a suspension rod 9. Outer frame 1
An upper cover 11 is provided at an upper part of 0, and a water supply valve 12, a power switch 13, a control device 14, and the like are provided. The encoder (rotation angle detection means) 15 detects the rotation angle of the motor 5, outputs six pulses for each rotation of the motor 5, and inputs the output to the control device 14. The control device 14 includes a pulse counter 16 for counting the number of output pulses of the encoder 15, a cloth amount determining unit 17 for determining a cloth amount based on an output of the pulse counter 16, a control unit 18 including a microcomputer, and a control unit 18.
A power switching means 19 for controlling the motor 5, the drain valve 6, the water supply valve 12 and the like in accordance with a signal from the controller, an operation display means 21 including a key switch and a display device provided in an operation panel 20, and a water level detection means 22 , Storage means 23, dirt detection means 24, temperature detection means 25, and timer means 26 for counting the reserved operation time. In addition, 27 is an AC power supply, and 28 is a phase advance capacitor of the motor 5.

The operation of the above configuration will be described with reference to FIGS. 3 to 6. First, the laundry is put into the washing / dewatering tub 1 in step 30 of FIG. 3, the power switch 13 is turned on, and the reservation is made in step 31. When the user sets the scheduled washing operation such as the washing end time and presses a start switch (not shown) of the operation display means 21 in step 32, the process proceeds to step 33, and the motor 5 is moved rightward as shown in FIG. After driving for 0.1 seconds and resting for 0.3 seconds, driving is performed for 0.3 seconds (predetermined time T1). Then, after pausing for 1.5 seconds (predetermined time T2), driving leftward for 0.1 seconds and pausing for 0.3 seconds, then 0.3 seconds (predetermined time T2)
1) Drive, then pause for 1.5 seconds (predetermined time T2). Repeat this operation several times. 0.3 seconds (predetermined time T
1) When driven, the rotation speed of the motor 5 increases as shown in FIG. At this time, the rise of the rotation speed of the motor 5 varies depending on the power supply voltage, the amount of the laundry, the tension of the belt 29, and the like, but the rotation speed of the motor 5 rises to a predetermined value during the drive for 0.3 seconds (the predetermined time T1). Like that.

Next, the process proceeds to step 34 in FIG. 3, in which the pulse counter 16 counts the number of output pulses of the encoder 15 from the beginning of the pause period until 0.4 seconds (predetermined time T3). To determine the amount of cloth (the amount of laundry). That is, as shown in FIG. 6B, the number of pulses detected by the pulse counter 16 differs depending on the amount of cloth, and the amount of cloth can be determined based on the number of detected pulses. In FIG. 6B, the curve (a) has a small amount of cloth,
(B) shows a case where the amount of cloth is large.

On the other hand, the number of rotations of the motor 5, that is, the number of pulses detected by the pulse counter 16 is affected by the tension of the belt 29 as described above. That is, FIG.
When the belt tension is small as shown in (c) (curve (c))
Means that the number of detection pulses is large and the belt tension is large (curve (d)), the number of detection pulses is small. Since the belt tension decreases with the use time of the main body of the washing machine, it is necessary to correct the belt tension in order to improve the detection accuracy of the cloth amount. The present inventors have found that there is a correlation between the number of detected pulses and the belt tension in the period (predetermined period T4) after the lapse of the predetermined time T3 and before the end of the suspension period, and based on the number of detected pulses in the predetermined period T4, As shown in Table 1), the belt tension is determined.

[0013]

[Table 1]

When the cloth amount determining means 17 determines the cloth amount,
Correction is performed based on the determined belt tension. That is, as shown in (Table 2), when the cloth amount is determined based on the number of detection pulses in the predetermined period T3, the determination level is shifted and corrected by the belt tension. In addition, the determination level in (Table 2) has shown the water supply water level according to the cloth amount. For example, when the operation is performed at a power supply frequency of 50 Hz, the number of detection pulses at the predetermined time T3 is 50, and the number of detection pulses at the predetermined time T4 is 30, the belt tension is determined to be 300 g from (Table 1). Then, the cloth amount is determined to be “medium” from (Table 2). Next, when the number of detection pulses at the predetermined time T3 is 50 and the number of detection pulses at the predetermined time T4 is 60, the belt tension is determined to be 100 g from (Table 1), and the cloth amount is determined from (Table 2). It is determined as “high”.

[0015]

[Table 2]

After the cloth amount is determined as described above, FIG.
And the user is notified of the detergent amount and the water level corresponding to the amount of cloth on the operation display means 21 for a certain period of time, and the standby state of the reserved washing operation is entered in step 37 until the reserved driving start time is reached. . At this time, as shown in (Table 3), the operation time of washing varies depending on the determination level (water supply level, that is, the amount of cloth).
By subtracting the operation time and the allowance time of 10 minutes from the end time of the scheduled washing, for example, if the scheduled washing end time is 7:00 am and the amount of the laundry is small, 37 minutes + 10 minutes =
By subtracting 47 minutes, 6:13 am is calculated as the start time of the reserved operation.

[0017]

[Table 3]

When the operation start time comes, step 3
In step 8, water is supplied to a predetermined water level, stirring is started in step 39, and the subsequent water flow, washing time, number of rinses, dehydration time, and the like are controlled according to the amount of cloth to perform a washing operation.

[0019]

As described above, the present invention provides a motor for driving a pulsator rotatably disposed on the bottom of a washing and dewatering tub, and a cloth amount determining means for determining the amount of cloth in the washing and dewatering tub. And, control means for controlling the drive of the motor, display means for displaying the water level and detergent amount , and a clock means for measuring the time, the control means determines the amount of cloth at the time of setting the reserved washing operation , The detergent amount and water level based on the determined amount of cloth are displayed, and the start time of the scheduled washing operation is set according to the amount of cloth, so that the amount of cloth can be accurately and quickly set without supplying water to the washing and dewatering tub. Can be determined, the laundry amount can be determined without delay immediately after setting the reserved washing operation, a detergent corresponding to the laundry amount can be supplied, and the reserved washing can be started according to the laundry amount. . Therefore, the processing can be completed at the reserved time regardless of the amount of the cloth, and the wrinkles of the clothes can be prevented from being left after leaving the reserved washing operation.

[Brief description of the drawings]

FIG. 1 is a block diagram of a fully automatic washing machine according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the fully automatic washing machine.

FIG. 3 is an operation flowchart of a main part of the fully automatic washing machine.

FIG. 4 is a waveform diagram of a voltage applied to a motor when the laundry amount of the automatic washing machine is determined.

FIG. 5 is a diagram showing the number of rotations of a motor when the amount of cloth of the fully automatic washing machine is detected.

FIGS. 6A to 6C are operation time charts of the fully automatic washing machine when detecting the amount of cloth;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing and dehydration tub 2 Pulsator 5 Motor 15 Encoder (rotation angle detecting means) 17 Cloth quantity judging means 18 Control means 26 Clocking means

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazutoshi Adachi 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-3-55098 (JP, A) JP-A Sho 62 JP-204795 (JP, A) JP-A-60-34493 (JP, A) JP-A-63-99898 (JP, A) JP-A-2-154794 (JP, A) (58) Fields investigated (Int. . ^7, DB name) D06F 33/02

Claims (1)

(57) [Claims] 1. A motor for driving a pulsator rotatably disposed on the bottom of a washing and dewatering tub, a cloth amount determining means for determining an amount of cloth in the washing and dewatering tub, and controlling the driving of the motor. Control means, a display means for displaying the water level and detergent amount , and a timing means for measuring the time, the control means determines the amount of cloth at the time of setting the reserved washing operation , based on the determined amount of cloth A fully automatic washing machine that displays the amount of detergent and water level and sets the start time of the scheduled washing operation according to the amount of cloth.