JPH11128585A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively disentangle clothes by rotating a vane clockwise and counter clockwise, secondly with a short live time and firstly with a shorter live time by a motor control device. SOLUTION: Load change and so on decide how clothes are tangled. Consequently, making and breaking control of thyristor is changed so that the clothes can be disentangled. The clothes drawn in the center of vane 6 by rotation of the vane 6 are pushed upward to spread outward and are drawn downward along the wall of washing and spin-drying basket 3. When the clothes spread outward at the upper surface, they are pulled to different directions to be disentangled. Before clothes-disentangling-process is run by control flow, balance process, which shakes the clothes by rotating more slightly during a shorter motor live time, is run so that clothes 10 can be placed evenly in the spin-drying basket 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine in which the appearance and unevenness of washing are reduced.

[0002]

2. Description of the Related Art Conventionally, for example, in a washing machine described in Japanese Patent Application Laid-Open No. 5-68773, a series of steps of washing, rinsing, and dehydrating are controlled, and a state of tangling the cloth is detected immediately before washing or rinsing is completed. A washing machine has been proposed in which one of a plurality of cloth loosening water flows is selected and executed in accordance with the state of the cloth being entangled to reduce the state of being entangled with the cloth so that the cloth can be easily taken out.

Further, in the washing machine described in Japanese Patent Application Laid-Open No. 6-126079, a cloth loosening water flow having a reversal time shorter than a normal water flow is executed immediately before the end of washing or rinsing, and immediately thereafter, a further short reversal is performed. A washing machine has been proposed in which a balanced water flow having a time limit is executed to reduce vibration during dehydration.

In addition, a number of washing machines have been proposed which detect the state of entanglement of the cloth during the washing and rinsing steps by various cloth entanglement detection methods and means, and execute a cloth loosening water flow when it is determined that the cloth is entangled. ing.

[0005]

However, as described above, in the method of executing the cloth loosening water flow immediately before the end of the washing or rinsing step, even if the cloth is entangled during the washing or rinsing step, the water flow is maintained. In order to continue the process, the cloth entangles more, and once it is extremely entangled, it cannot be loosened sufficiently, which may cause imbalance during spinning rotation or take out the cloth after spinning. There were problems such as difficulty.

[0006] In addition, the method of detecting the state of the cloth being entangled during the washing or rinsing step and executing the cloth-releasing water flow each time is effective even when the cloth is largely unevenly distributed in the washing tub. Does not work uniformly, especially if the cloth is gathering in the center of the washing tub due to the heart-shaped water flow, even if the loosening water flow is executed, the lump of cloth simply rotates around the center of the washing tub, There was a problem that the effect of the relaxing water flow could not be obtained.

[0007] The present invention has been made in view of the above problems, and has as its object to provide a washing machine capable of effectively obtaining a cloth loosening effect.

[0008]

In order to achieve the above object, a washing machine according to the first aspect of the present invention is provided with a washing tub for accommodating a cloth, and is disposed in the washing tub so as to be rotatable forward and backward. A stirrer, a motor for rotating the stirrer, and motor control means for controlling the energization time and forward / reverse rotation of the motor to rotate the stirrer in the forward / reverse direction; In a washing machine which performs an operation of rotating the stirring blade in a normal / reverse direction with a short energization time relative to the energization time in the process to release the cloth from the cloth, the motor control means controls the rotation of the stirring blade in a short energization time. In addition, the stirring blade is rotated forward and backward with a shorter energization time.

Further, the washing machine according to claim 2 of the present invention,
In the washing machine according to the first aspect, a shorter energization time is changed according to a bath ratio.

Further, the washing machine according to a third aspect of the present invention is the washing machine according to the first aspect, wherein a shorter energization time is changed in accordance with a state of looking at the cloth.

According to the above construction, in the washing machine according to the first aspect of the present invention, before the motor control means rotates the stirring blade in the forward and reverse directions with a short energization time, the washing blade is rotated in the forward and reverse directions with a shorter energization time. Since the cloth is rotated, a shaking action is applied to the cloth before the cloth is loosened, so that the cloth can be evenly dispersed in the washing tub. When the cloth is loosened, the whole cloth can be loosened.

In the washing machine according to the second or third aspect of the present invention, the shorter energization time is changed in accordance with the bath ratio or the state of looking at the cloth. So that you can relax.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A washing machine according to an embodiment of the present invention will be described below with reference to the drawings.

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

In the drawing, reference numeral 1 denotes an outer frame, in which a water tank 2 is placed.
And the washing and dewatering tub 3 is made of a vibration absorbing spring 5 by a hanging rod 4.
And is swingably suspended via the. A stirring blade 6 is rotatably disposed on the inner bottom of the washing and dewatering tub 3,
The washing and spin-drying tub 3 and the pulsator 6 are driven to rotate by a driving motor 7, a transmission gear box 8, and a belt 9 that transmits power between them, and the like.

FIG. 2 is a diagram showing a circuit for controlling the stirring blade of the fully automatic washing machine according to the embodiment of the present invention.

In FIG. 1, reference numeral 7 denotes a drive motor for rotating the stirring blade 6, and a power supply from an AC power supply 30 is provided.
The microcomputer 21 as a motor control means controls opening and closing by using the thyristors 23 and 24,
The drive motor 7 is rotated in the forward and reverse directions. Reference numeral 22 denotes a motor voltage detecting means, which has a function of detecting a voltage applied to the stirring blade by detecting a voltage between both ends of the driving motor 7.
Then, the information is input to the microcomputer 21, the amount of the cloth is detected from the magnitude of the load, and the state of the cloth is determined from the load fluctuation and the like. As a result, when it is determined that the cloth is involved, the opening / closing control of the thyristors 23 and 24 is temporarily switched to execute the step of loosening the cloth.

FIG. 3 is a diagram showing the movement of the cloth during the cloth loosening step.

By the rotation of the stirring blade 6, the cloth is drawn into the center of the stirring blade 6, pushed up, spreads on the outer periphery on the upper surface, and is drawn down along the tub wall of the washing and dewatering tub 3. . Since the cloth is pulled in a different direction when it spreads to the outer peripheral portion on this upper surface, the entanglement between the cloths is released.

However, when performing the cloth loosening operation, for example, as shown in FIG. 4, if the cloth 10 is unevenly distributed in the washing and dewatering tub 3, the cloth movement as described above cannot be performed, and the cloth 10 becomes entangled. May be left as is.

Also, as shown in FIG. 5, when the cloth 10 is gathered in the central part in the washing and dewatering tub 3, the cloth 10 wraps around the central part as a lump even if the loosening water flow is executed. Just by rotating, the cloth cannot be loosened, and the cloth 10 remains entangled.

Therefore, in the fully automatic washing according to the present embodiment, before the cloth loosening step is performed, the shaking action is performed by using the small-step reversal of the motor drive energizing time, in accordance with the control flow shown in FIG. By performing a certain balancing step and uniformly distributing the cloth 10 in the washing and dewatering tub 3 as shown in FIG. 7, and then performing the cloth loosening step, the cloth loosening step can be performed effectively.

[0023] As a result, not only is the leach of the cloth after dewatering reduced and it is easy to take out, but also the lint is released and the cloth 10 is evenly distributed in the washing and dewatering tub 3.
The washing liquid comes into contact with the cloth 10 evenly, and the washing unevenness can be reduced.

FIG. 8 shows an example of the motor drive energizing time of each process which was effective in reducing the tangling of the dewatered cloth when the cloth amount was 6 kg and the stirring water amount was 46 liters.

In a fully automatic washing machine, the amount of water is determined with respect to the detected amount of cloth, and the bath ratio is determined. The easiness of movement of the cloth changes depending on the magnitude of the bath ratio. The cloth 10 is easy to move when the bath ratio is large, and hard to move when the bath ratio is small. Therefore,
When the bath ratio is small and it is difficult to move, the execution time of the balance process is extended, and when the bath ratio is large, the execution time is shortened.
And the disintegration step can be performed effectively.

[0026] Also, in the case of a hot water that is large,
Unlike when the cloth 10 is simply hardened or skewed, it takes time to uniformly distribute the cloth 10 in the washing and dewatering tub 3. For this reason, when the cloth is large,
It is effective to lengthen the execution time of the balance process.

[0027]

As described above, according to the first aspect of the present invention,
According to the described washing machine, the cloth can be evenly dispersed in the washing tub before the cloth is unraveled, so the cloth loosening effect works effectively, and the dewatered cloth is less tied and easy to take out, and the washing unevenness is also reduced. Is done.

Further, according to the washing machine of the second or third aspect, the cloth can be uniformly dispersed and loosened in the washing tub without waste.

[Brief description of the drawings]

FIG. 1 is a sectional view of a washing machine according to an embodiment of the present invention.

FIG. 2 is a diagram showing a circuit for controlling a stirring blade of the washing machine according to the embodiment of the present invention.

FIG. 3 is a view showing the movement of the cloth during the cloth loosening step.

FIG. 4 is a diagram showing a state where the cloth is unevenly distributed in the washing tub.

FIG. 5 is a diagram showing a state in which the cloth is solidified in a central portion in the washing tub.

FIG. 6 is a flowchart showing a control operation of the washing machine according to the embodiment of the present invention.

FIG. 7 is a diagram showing a state where cloths are uniformly distributed in the washing tub.

FIG. 8 is a diagram showing an example of a motor drive energizing time in the washing machine according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 3 washing and dewatering tank 6 stirring blade 7 driving motor 10 cloth 21 microcomputer 22 motor voltage detecting means

Claims (3)

[Claims] 1. A washing tub for accommodating a cloth, a stirring blade disposed in the washing tub so as to be freely rotatable in a forward and reverse direction, a motor for rotating the stirring blade, and a control of an energizing time and a forward and reverse rotation of the motor. Motor control means for rotating the stirring blades forward and backward, and rotating the stirring blades forward and reverse with a short energizing time relative to the energizing time in the washing or rinsing step by the motor controlling means, to look at the cloth. In the washing machine which performs the unraveling operation, the motor control means rotates the stirring blade forward and reverse in a shorter energizing time before rotating the stirring blade forward and reverse in a short energizing time. . 2. The washing machine according to claim 1, wherein a shorter energization time is changed according to a bath ratio. 3. The washing machine according to claim 1, wherein a shorter energization time is changed in accordance with the state of the cloth.