JPH10328477A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform washing by a stream corresponding to the quality and quantity of laundry and to provide satisfying washing effect and rinsing effect by changing the strength of the stream corresponding to the rotating degree of the laundry fed into a washing tank with respect to a washing machine for inversion-driving a pulsator freely rotatably disposed to the washing tank and performing washing. SOLUTION: The pulsator freely rotatably disposed to the washing tank is inversion-driven by a motor 5 and the rotation angle of the pulsator is detected by an encoder 15. A rotation dispersion judgement means 17 repeats the operation of driving the pulsator for prescribed time T1 and then stopping it for the prescribed time T2 for plural times by a control means 18 for controlling the drive of the motor 5 and judges the rotation dispersion of the laundry inside the washing tank by the output of the encoder 15 in the prescribed time T2. The control means 18 selects the stream from the plural streams based on the judged result of the rotation dispersion judgement means 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for washing a pulsator, which is rotatably disposed in a washing tub, by inverting a pulsator.

[0002]

2. Description of the Related Art Conventionally, in a washing machine of this type, a pulsator is turned on and off a plurality of times in a water flow after water is supplied to a washing tub up to a predetermined water level. Was detected to determine the amount of cloth in the washing tub, and a water flow according to the amount of cloth was automatically set.

[0003]

In such a conventional washing machine, since the water flow is selected based on the cumulative number of rotations in the multiple ON / OFF operations, the degree of rotation of the laundry in the washing tub varies. In other words, when the ON / OFF drive is repeated a plurality of times, if the rotation speed fluctuates during the plurality of repetitions, an appropriate water flow cannot be selected, and as a result, a satisfactory cleaning effect and a rinsing effect cannot be obtained. Had the problem that

[0004] The present invention solves the above-mentioned problems, and makes it possible to change the intensity of the water flow according to the degree of circulation of the laundry put in the washing tub, and to wash the laundry with the water flow according to the quality and quantity of the laundry. The purpose is to achieve satisfactory cleaning and rinsing effects.

[0005]

According to the present invention, in order to achieve the above object, a pulsator rotatably disposed in a washing tub is reversely driven by a motor, and a rotation angle of the pulsator is detected by rotation angle detecting means. The rotation variation determining means repeats an operation of driving the pulsator for a predetermined time T1 and then pausing for a predetermined time T2 a plurality of times by a control means for controlling the driving of the motor, and the laundry in the washing tub is output by the output of the rotation angle detecting means at the predetermined time T2. Is determined. The control means selects a water flow from a plurality of water flows based on the determination result of the rotation variation determination means.

[0006] Thus, the strength of the water flow can be changed according to the degree of rotation of the laundry put into the washing tub, and the laundry can be washed by the water flow according to the quality and quantity of the laundry, and satisfactory washing can be performed. An effect and a rinsing effect can be obtained.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a pulsator that is rotatably disposed in a washing tub to generate a water flow, a motor that drives the pulsator to reverse, and a rotation angle of the pulsator. A rotation angle detection unit for detecting, a rotation variation determination unit for determining a movement of the clothes in the washing tub based on an output of the rotation angle detection unit, and a control unit for controlling driving of the motor; Means for controlling the pulsator by the control means for a predetermined time T1.
The operation of pausing for a predetermined time T2 after driving is repeated a plurality of times, and the rotation variation of the laundry in the washing tub is determined based on the output of the rotation angle detection means at the predetermined time T2. The water flow is selected from a plurality of water flows based on the determination result, and the strength of the water flow can be changed according to the rotation of the laundry put into the washing tub, and the quality of the laundry can be improved. The washing can be performed by the water flow according to the amount, and a satisfactory washing effect and a rinsing effect can be obtained.

[0008]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a washing and dewatering tub (washing tub) 1 has a pulsator 2 rotatably disposed on the bottom surface. The water receiving tub 3 contains the washing and dewatering tub 1 and has a motor 4, a drain valve 6, a washing and dewatering switching mechanism 7 and the like fixed to a substrate 4 at the outer bottom. 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. An upper cover 11 is provided on an upper portion of the outer frame 10, and a water supply valve 12, a power switch 13, a control device 14 and the like are provided. An encoder (rotation angle detection means) 15 detects the rotation angle of the pulsator 2 by detecting the rotation angle of the motor 5, outputs six pulses for each rotation of the motor 5, and controls the output. Input to the device 14.

The control device 14 is configured as shown in FIG. 1. The pulse memory 16 stores the output pulses of the encoder 15, and the rotation variation judging means 17 uses the output of the pulse memory 16 to control the washing and dewatering of the tub 1. The variation in the rotation of the laundry inside is determined. The control means 18 is constituted by a microcomputer, and receives a signal from the control means 18 via the power switching means 19 to control the motor 5, the drain valve 6,
The water supply valve 12 and the like are controlled, and a water flow is selected from a plurality of water flows based on the determination result of the rotation variation determination means 17.

The operation display means 20 is disposed in the operation panel 21 and is composed of a key switch, a display device and the like.
The water level detecting means 22 detects the water level in the washing and dewatering tub 1. The storage means 23 stores data necessary for controlling each process of washing, rinsing, and dehydrating. The dirt detection means 24 detects dirt on the laundry in the washing and dewatering tub 1. 25 is an AC power supply, 26 is a motor 5
Is a V-belt.

The operation of the above configuration will be described with reference to FIGS. 3 and 4. In step 28 of FIG. 3, agitation is started with the laundry and water in the washing and dewatering tub 1, and in step 29, The motor 5 is driven for a predetermined time T1 (for example, 1 second), and a plurality of times (for example, 10 to 30 times) of reversal agitation is performed in a reversal period of a predetermined time T2 (for example, 1 second) pause. The output pulse of the encoder 15 at the time of pause is detected and stored in the pulse memory 16. In step 30, the rotation variation of the laundry in the washing and spin-drying tub 1 is detected from the output pulse of the encoder 15 stored in the pulse memory 16.

At this time, even if the amount of the laundry in the washing and dewatering tub 1 is large or the laundry is stiff, the laundry is difficult to rotate at a constant even with the same reversal time, and FIG.
As shown in (2), since the pulsator 2 hardly turns or turns suddenly, the difference (rotational variation) H between the maximum value and the minimum value of the number of rotations of the pulsator 2 increases, If it is not strong or if it fits well, the laundry is likely to rotate constantly and the rotation variation will be small.

In step 31, the rotation variation determining means 1
7 is a rotation variation H and a preset first predetermined value H
1 (However, the rotation speed of the pulsator 2 is 150
rpm, for example, 30 rpm)
When H1 ≧ H, it is determined that the rotation variation is small, the process proceeds to step 32, and the water flow is maintained. As shown in (Table 1), the pulsator 2 is turned over with 1 second on-1 second off. Proceed to the next step.

[0015]

[Table 1]

If it is determined in step 31 that H1 ≧ H is not satisfied, in step 33, a second predetermined value H2 (where H2 is 70 rpm when the rotation speed of the pulsator 2 is 150 rpm, for example) is set in step 33. Compare, H2 ≧ H
If> H1, it is determined that there is rotation variation, and the process proceeds to step 34, where the water flow is changed to the medium water flow, and the pulsator 2 is turned over with 2 seconds on and 1 second off as shown in (Table 1). Then proceed to the next step.

In step 33, if H2 ≧ H is not satisfied,
It is determined that the rotation variation is large, the process proceeds to step 35, and the water flow is changed to a strong water flow, and as shown in (Table 1), the pulsator 2 is reversed for 2.4 seconds on and 1 second off to perform the next operation. move on.

As described above, according to the present embodiment, the variation in the rotation of the laundry in the washing and spin-drying tub 1 is determined, and the water flow is selected based on the result of the determination of the variation in the rotation. The intensity of the water flow can be changed according to the degree of rotation of the laundry put into the dewatering tub 1, the laundry can be washed by the water flow according to the quality and quantity of the laundry, and a satisfactory cleaning effect can be obtained. A rinsing effect can be obtained.

In this embodiment, stirring is started in a state where the laundry and the water are in the washing and spin-drying tub 1, and the rotation variation of the laundry in the washing and spin-drying tub 1 is detected. Alternatively, the rotation variation of the laundry may be appropriately detected during the washing process or the rinsing process.

Further, in the present embodiment, the variation in rotation of the laundry in the washing and spin-drying tub 1 is determined from the output of the pulse memory 16 by the rotation variation determining means 17. The output may be input to the control means 18, and the control means 18 may determine the variation in the rotation of the laundry.

In the present embodiment, the washing and dewatering washing machine in which the washing and dewatering tub 1 is included in the water receiving tub 3 has been described. However, a so-called two-tank washing machine without a water receiving tub is similarly configured. And the same operation and effect can be obtained.

[0022]

As described above, according to the first aspect of the present invention, the pulsator that is rotatably disposed in the washing tub to generate a water flow, the motor that inverts and drives the pulsator, and the pulsator Rotation angle detection means for detecting the rotation angle of the, rotation variation determination means for determining the movement of the clothes in the washing tub by the output of the rotation angle detection means, and control means for controlling the drive of the motor, The rotation variation determining means repeats an operation of driving the pulsator for a predetermined time T1 and then resting for a predetermined time T2 a plurality of times by the control means, and the output of the rotation angle detecting means at a predetermined time T2 causes the laundry in the washing tub to rotate. Since the rotation variation is determined and the control means selects a water flow from a plurality of water flows based on the determination result of the rotation variation determination means, The intensity of the water flow can be changed according to the state of the laundry put in the laundry, so that the laundry can be washed by the water flow according to the quality and quantity of the laundry, and a satisfactory washing effect and a rinsing effect can be obtained. be able to.

[Brief description of the drawings]

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

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

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

FIG. 4 is a diagram showing the number of revolutions of the washing machine when detecting a water flow.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing and dehydration tub (washing tub) 2 Pulsator 5 Motor 15 Encoder (rotation angle detection means) 17 Rotation variation determination means 18 Control means

Claims (1)

[Claims] 1. A pulsator that is rotatably disposed in a washing tub to generate a water flow, a motor that inverts and drives the pulsator, rotation angle detection means that detects a rotation angle of the pulsator, and a rotation angle detection means. A rotation variation determining unit that determines the movement of the clothes in the washing tub based on the output; and a control unit that controls the driving of the motor. The rotation variation determination unit drives the pulsator for a predetermined time T1 by the control unit. Thereafter, the operation of pausing for a predetermined time T2 is repeated a plurality of times, and the rotation variation of the laundry in the washing tub is determined by the output of the rotation angle detection means at the predetermined time T2, and the control means determines the rotation variation by the rotation variation determination means. A washing machine that selects a water flow from a plurality of water flows based on a result.