JPH05123484A - Full automatic washing machine - Google Patents

Abstract

PURPOSE:To provide the subject machine in which the amount of clothes is determined in a short time after preengagement operation begins to be preset, a detergent corresponding to the amount of the clothes can be thrown thereinto, and the time when washing operation preengaged is to be started is preset corresponding to the amount of the clothes, and to prevent the clothes wrinkle from being left in that state after the washing operation is ended. CONSTITUTION:When preengagement operation begins to be preset, the rotary angle of a motor 5, which drives a pulsator rotatably arranged in a washing and spin-drying receptacle, is detected by an encoder 15, and the output therefrom is inputted into a determining means 17 for the amount of clothes in the washing and spin-drying receptacle. When the operation that a motor 5 is driven during a definite time T1 and is suspended during a definite time T2, is repeated several times before water is supplied into the washing and spin-drying receptacle by a control means 18, the determining means 17 determines the amount of the clothes by the output from the encoder 15 during a definite time T3 starting the suspension of the operation. On the basis of this result, the time when washing-operation preengaged is to be started is preset and the washing operation is ended at the preset time independently of the amount of the clothes.

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 reserved washing operation in which the amount of cloth is determined before water is supplied to a washing / dehydrating tub.

[0002]

2. Description of the Related Art In recent years, full-automatic washing machines are mainly used to judge the amount of cloth in a washing / dehydrating tub and automatically set the water supply level, water flow, washing time, etc. according to the amount of cloth. ..

Conventionally, in this type of fully automatic washing machine, after supplying water to a washing / dehydrating tub up to a predetermined water level, a pulsator is turned on and off a plurality of times, and the number of revolutions of the motor is controlled by the back electromotive force of the motor when it is off. It detects and determines the amount of cloth in the washing and dehydration tank,
When the water level, water flow, washing time, etc. are automatically set according to the amount of cloth, the amount of cloth is not judged when the reserved washing operation is set and the reserved operation start time is also the largest amount of cloth. It was set based on the driving time.

[0004]

In such a conventional fully automatic washing machine, the amount of cloth is not determined when the reserved washing operation is set. Therefore, it is necessary to put detergent into the user's intuition.
There is a problem that a detergent suitable for the amount of cloth cannot be added. Also, the operation start time for reserved laundry is set based on the operation time when the amount of cloth is the largest, and when the amount of cloth is small, the reserved laundry operation ends considerably earlier than the reserved time,
Since the clothes are left dehydrated, there is a problem of wrinkles.

The present invention solves the above-mentioned problems. When setting a reserved washing operation, the amount of cloth can be determined in a short time without supplying water to the washing / dehydrating tank, and a detergent corresponding to the amount of cloth can be added. In addition, by setting the operation start time of reserved laundry according to the amount of cloth, the object is to prevent wrinkles caused by leaving clothes left dehydrated.

[0006]

In order to achieve the above object, the present invention provides a motor for driving a pulsator rotatably arranged in a washing / dehydrating tub, and a rotation angle detecting means for detecting a rotation angle of the motor. And a cloth amount judging means for judging the cloth amount in the washing / dehydrating tub by the output of the rotation angle detecting means,
A control unit for controlling the drive of the motor and a time counting unit for timing the time are provided, and the control unit performs a plurality of operations of driving the motor for a predetermined time T1 and then for a predetermined time T2 at the time of setting the reserved washing operation, The amount of cloth is determined from the output of the rotation angle detection means from the start of the rest period to the predetermined time T3, and the start time of the reserved washing operation is set according to the amount of cloth.

[0007]

According to the present invention, the amount of cloth can be determined by the output of the rotation angle detecting means from the beginning of the rest period to the predetermined time T3 by the above-mentioned means for solving the problem, and it is possible to accurately and shortly supply water to the washing / dehydrating tub. Since the laundry amount can be determined in time, the laundry amount can be determined when the reserved washing operation is set, a detergent corresponding to the laundry amount can be added, and the reserved laundry operation according to the laundry amount can be performed.

[0008]

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

As shown in the figure, the washing / dehydrating tub 1 has a pulsator 2 rotatably arranged at the center bottom. The water tub 3 includes the washing / dehydrating tub 1 therein, and the substrate 4 is fixed to the outer bottom portion of the water tub 3, and the motor 5, the drain valve 6, the washing / dehydrating switching mechanism 7 and the like are arranged. The outer edge portion of the substrate 4 is suspended from the upper corners of the outer frame 10 via a vibration isolator 8 and a suspension rod 9. Outer frame 1
An upper cover 11 is provided on the 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 detecting means) 15 detects the rotation angle of the motor 5, outputs 6 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 that counts the number of output pulses of the encoder 15, a cloth amount determination unit 17 that determines the cloth amount based on the 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 response to a signal from the operation panel, an operation display means 21 including a key switch and a display device arranged in the operation panel 20, and a water level detection means 22. The storage means 23, the dirt detection means 24, the temperature detection means 25, and the time measurement means 26 for measuring the reserved operation time. Incidentally, 27 is an AC power supply, and 28 is a phase advancing capacitor of the motor 5.

The operation of the above structure will be described with reference to FIGS. 3 to 6. First, in step 30 of FIG. 3, the laundry is put in the washing / dehydrating tub 1, the power switch 13 is turned on, and the reservation is made in step 31. When the reserved washing operation such as the washing end time is set and the start switch (not shown) of the operation display means 21 is pressed in step 32, the process proceeds to step 33, and the motor 5 is moved to the right as shown in FIG. After driving for 0.1 seconds, resting for 0.3 seconds, driving for 0.3 seconds (predetermined time T1). After that, after 1.5 seconds rest (predetermined time T2), 0.1 seconds drive to the left and 0.3 seconds rest, then 0.3 seconds (predetermined time T2
1) Drive and then pause for 1.5 seconds (predetermined time T2). This operation is repeated multiple times. 0.3 seconds (predetermined time T
1) When driven, the rotation speed of the motor 5 rises as shown in FIG. At this time, the rotation speed of the motor 5 rises depending on the power supply voltage, the amount of laundry, the tension of the belt 29, etc., but the rotation speed of the motor 5 rises to a predetermined value during the driving for 0.3 seconds (predetermined time T1). I am trying.

Next, in step 34 of FIG. 3, the pulse counter 16 counts the number of output pulses of the encoder 15 from the beginning of the rest period to 0.4 seconds (predetermined time T3), and in step 35, the cloth amount judging means 17 Determines the amount of laundry (the amount of laundry). That is, the number of detection pulses of the pulse counter 16 varies depending on the amount of cloth, as shown in FIG. 6B, and the amount of cloth can be determined by the number of detection pulses. In Fig. 6 (b), the curve (a) has a small amount of cloth,
(B) shows the 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 detection pulses of the pulse counter 16 is influenced by the tension of the belt 29 as described above. That is, FIG.
When the belt tension is low as shown in (c) (curve (C))
The number of detection pulses is large, and the number of detection pulses is small when the belt tension is large (curve (d)). Since the belt tension decreases as the washing machine body is used, the belt tension needs to be corrected to improve the cloth amount detection accuracy. The present inventors have found that there is a correlation between the number of detection pulses in the period (the predetermined period T4) after the elapse of the predetermined time T3 until the end of the rest period (the predetermined period T4), and by the number of detection pulses in the predetermined period T4 ( As shown in Table 1), the belt tension is determined.

[0013]

[Table 1]

When the cloth amount judging means 17 judges 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 by 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) indicates the water supply level according to the amount of cloth. For example, when the power source frequency is 50 Hz and 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). However, the amount of cloth 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 amount of cloth is determined from (Table 2). Judge as "high".

[0015]

[Table 2]

After determining the amount of cloth as described above, FIG.
In step 36, the operation display means 21 displays the amount of detergent and the water level corresponding to the amount of cloth for a certain period of time to inform the user, and in step 37, the state of waiting for the reserved washing operation is entered until the start time of the reserved operation. .. At this time, since the operating time of washing differs depending on the determination level (water supply level, that is, the amount of cloth) as shown in (Table 3), the control means 18 causes the step 35.
By subtracting the operating time and the spare time of 10 minutes from the end time of the reserved laundry according to the laundry amount determined in, for example, if the reserved laundry end time is 7:00 am and the laundry amount is small, 37 minutes + 10 minutes =
47 minutes is subtracted and 6:13 am is calculated as the start time of the reserved operation.

[0017]

[Table 3]

When the operation start time comes, step 3
8, the 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, etc. are controlled according to the amount of cloth to perform the washing operation.

[0019]

As is apparent from the above embodiments, according to the present invention, the motor for driving the pulsator rotatably arranged in the washing / dehydrating tub and the rotation angle detecting means for detecting the rotation angle of the motor. And a cloth amount judging means for judging the cloth amount in the washing / dehydrating tub based on the output of the rotation angle detecting means, a control means for controlling the drive of the motor, and a time measuring means for measuring time, When the reserved washing operation is set, the control means performs a plurality of operations of driving the motor for a predetermined time T1 and then pausing for a predetermined time T2.
The amount of cloth is determined by the output of the rotation angle detecting means up to 3, and the start time of the reserved washing operation is set according to the amount of cloth. Therefore, the amount of cloth can be determined in a short time when setting the reserved washing operation. The detergent can be added according to the amount of cloth, and the reserved washing operation can be started according to the amount of cloth. Wrinkles on clothing can be prevented.

[Brief description of drawings]

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

[Fig. 2] Vertical sectional view of the fully automatic washing machine

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

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

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

[Fig. 6] (a) to (c) Operation time chart of the fully automatic washing machine when detecting the amount of cloth

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing / dehydrating tank 2 Pulsator 5 Motor 15 Encoder (rotation angle detecting means) 17 Cloth amount judging means 18 Control means 26 Timing means

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazutoshi Adachi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A motor for driving a pulsator rotatably arranged in a washing / dehydrating tub, a rotation angle detecting means for detecting a rotation angle of the motor, and an output of the rotation angle detecting means for the washing / dehydrating tub. It comprises a cloth amount judging means for judging the amount of cloth in the inside, a control means for controlling the drive of the motor, and a time measuring means for measuring the time, and the control means keeps the motor for a predetermined time T1 when setting the reserved washing operation. Predetermined time T after driving
2 The operation of pausing is performed a plurality of times, the amount of cloth is determined from the output of the rotation angle detecting means from the beginning of the pausing period to the predetermined time T3, and the start time of the reserved washing operation is set according to the amount of cloth. Fully automatic washing machine.