KR20070081876A - Control method of washing machine - Google Patents

Abstract

A method for controlling the dehydration of a washing machine is provided to improve the stability of the washing machine by reducing vibration or noise generated during the main dehydration. A method for controlling the dehydration of a washing machine includes the steps of: accelerating a drive motor until the RPM(Revolution Per Minute) of the drive motor reaches a first setting RPM(S110); sensing an eccentric value during controlling the motor at constant speed when the RPM of the drive motor reaches the first setting RPM(S120); comparing the sensed eccentric value with a first standard eccentric value(S130); accelerating the drive motor until the RPM of the drive motor reaches a second setting RPM(S140); decelerating the drive motor until the first setting RPM when the RPM of the drive motor reaches the second setting RPM(S150); sensing the eccentric value during controlling the motor at constant speed(S160); comparing the sensed eccentric value with the first standard eccentric value again(S170); determining whether the sensed eccentric value is smaller than the second standard eccentric value or not if the sensed eccentric value is smaller than the first standard eccentric value(S180); and performing the main dehydration after decreasing the RPM of the drive motor until a fourth RPM determined during an operation of the washing machine if the sensed eccentric value is higher than the second standard eccentric value(S190).

Description

Dehydration control method of washing machine {Control method of washing machine}

1 is a block diagram of a washing machine according to the present invention,

2 is a flowchart illustrating a dehydration control method of a washing machine according to the present invention;

3 is a graph showing the motor RMP according to the time of the dehydration control method of the washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

10: Tub 20: Drum

21: entrance hall 22: through hole

30: drive motor 32: rotating shaft

34: Hall sensor m: Four

The present invention relates to a dehydration control method of a washing machine, and more particularly, to a dehydration control method of a washing machine for controlling an RPM of a drive motor at the time of dehydration by sensing an eccentric value of a dehydration load.

In general, a drum washing machine is a device that removes contaminants from the fabric contained in the drum by using the detergent and water contained in the tub.

The operation of a general drum washing machine is as follows.

First, close the door after inserting the cloth into the drum, and operate the drum washing machine, the control unit detects the amount of the injected cloth and sets the washing level, washing time, detergent amount, rinsing and water flow according to the detected quantity do.

The water supply device is operated according to the detected quantity of water to wash the water to a predetermined level in the drum washing machine, and the supplied wash water is supplied to the tub and is contained in the tub. Subsequently, the drum is rotated by driving the motor at a set rotation speed for a predetermined time, and the cloth contained in the drum falls off when it is buried by the action of the washing water. After the washing stroke is completed, the contaminated washing water in the tub is drained to the outside of the drum washing machine through the drainage device.

On the other hand, the drum washing machine is rinsed several times to rinse the remaining foam on the fabric, the water supply and the motor is controlled in accordance with the detected amount as in the washing stroke. The contaminated water, including foam, is then drained out of the drum washing machine through a drainage device.

After several rinsing cycles as described above, a dehydration stroke for centrifugal dehydration is performed.

However, in the conventional drum washing machine, before entering the dehydration step, since the AlMP of the driving motor during the dehydration is rapidly raised in a state where water is not sufficiently discharged from the fabric, the eccentricity is appropriate due to the influence of the water remaining on the fabric. Not solved, there is a problem that the vibration and noise is increased.

The present invention has been made to solve the above problems of the prior art, an object of the present invention is to provide a dehydration control method of a washing machine to reduce the vibration or noise generated when performing the dehydration.

Dehydration control method of the washing machine according to the present invention for solving the above problems, the step of detecting the eccentric value of the dehydration load, and if the detected eccentric value is higher than the reference eccentric value, the first main dehydration determined during operation of the washing machine Driving the drive motor to a lower second bone dewatering AlPM for RPM (RPM) to perform bone dehydration.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

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

The washing machine according to the present invention, as shown in FIG. 1, the tub 10 in which the washing water is contained in the washing or rinsing stroke and the dehydrated water is contained in the dehydration stroke, and is rotatable in the tub 10. The drum 20, which is positioned in such a way as to accommodate the drum m, the driving motor 30 supporting and rotating the drum 20, and draining the wash water in the tub 10 to the outside And a drain 14.

The drum 20 has an access hole 21 through which the cloth (m) can enter and exit, and a through hole 22 is formed to allow the washing water and the air to enter and exit.

The driving motor 30 is supported by a bearing (not shown) on the tub 10 while the rotary shaft 32 penetrates the tub 10, and a tip thereof is connected to the drum 20.

The drive motor 30 is provided with a sensor mechanism, such as Hall sensor 34 for measuring the angle or rotation angle.

2 is a flowchart illustrating a dehydration control method of the washing machine according to the present invention, Figure 3 is a graph showing the AlpM of the drive motor over time of the dehydration control method of the washing machine according to the present invention.

First, the drive motor 30 is accelerated so that the RPM of the drive motor 30 reaches the first set RPM (rpm1) (S110), which corresponds to section A in FIG. 3.

When the RPM of the driving motor 30 reaches the first setting RPM1, the first setting RPM1 is maintained, and the eccentric value UB is sensed while the motor 30 is controlled at constant speed. Section S in FIG. 3 shows that the drive motor 30 is maintained at a constant speed at the first setting RPM1.

Here, the detection of the eccentric value divides the section B into several sections, and determines the maximum eccentric value among the eccentric values of each section as the eccentric value of the acceleration step.

Thereafter, the detected eccentric value UB is compared with a first reference eccentric value (first pass UB) (S130).

Here, the first reference eccentric value determines whether to enter section F, which is the main dehydration section in FIG. 3, which will be described later, or whether section C and section D, which are simple dehydration sections in FIG. 3, are repeatedly executed. Is the preset eccentric value.

In the simple dehydration, an acceleration step (S140) of accelerating the driving motor 30 to reach the second setting ALPM (rpm2) of the driving motor 30 and the second setting of the ALPM of the driving motor 30 is performed. When reaching the RPM (rpm2), the deceleration step (S150) for decelerating the drive motor to the first set ALPM (rpm1), and the drive motor so that the ALMP of the drive motor 30 maintains the first set ALPM (rpm1). And controlling the 30 and detecting the eccentric value UB while the driving motor 30 is controlled at constant speed (S160).

At this time, the acceleration step corresponds to section C in FIG. 3, the deceleration step corresponds to section D, and the sensing of the eccentric value during the constant speed control of the drive motor 30 corresponds to section E. FIG.

Through the above simple dehydration, the water in the fabric is partially dehydrated from the fabric, and the eccentricity of the fabric due to the water remaining in the fabric is partially resolved.

Thereafter, the detected eccentric value UB is compared with the first reference eccentric value again (S170).

As a result of the comparison, if the detected eccentricity value UB is greater than the first reference eccentricity value, the drum washing machine determines that the eccentricity is eccentric, and then performs simple dehydration. Then, the detected eccentricity value UB is less than or equal to the first reference eccentricity value. The detection and comparison of the eccentric value and comparison and foreclosure are repeated until it is determined, and it is determined whether the detected eccentric value UB is smaller than the first reference eccentric value.

When the sensing eccentricity value UB is smaller than the first reference eccentricity value, it is determined whether the sensing eccentricity value UB is smaller than the second reference eccentricity value (S180).

When the sensed eccentricity value UB is smaller than the second reference eccentricity value (second pass UB), the dehydration is performed at a third RPM (rpm3), which is the maximum RPM of the preset driving motor 30. When the detection eccentric value UB is higher than the second reference eccentricity, the dehydration of the driving motor 30 is performed by lowering the RPM of the driving motor 30 to the fourth RPM4 determined during the driving operation of the washing machine (S190).

At this time, the step of performing the main dehydration, in the driving of the drive motor 30 to the third or fourth RMP in Figure 3 to perform the dehydration corresponds to the section F, the detection eccentric value (UB) is When higher than the second mood eccentricity, the dehydration is performed by lowering the ALPM of the driving motor 30 of the motor from the third ALPM to the fourth ALPM4.

As described above, when the detection eccentricity value UB is higher than the second reference eccentricity, the ALPM of the drive motor 30 is reduced to three or four ALPM to perform the main dehydration, thereby reducing vibration or noise generated during the main dehydration. .

The fourth RMP may be determined by the user's course input or may be set by the user's dehydration ALPM input.

In addition, when the speed stage of the ALMP of the drive motor during the main dehydration of the washing machine is composed of a plurality of speeds, the dehydration can be performed at a level lower than the level belonging to the main dehydration ALMP determined at the operation of the washing machine. have.

In this case, the second reference eccentricity value refers to a set eccentricity value determined to change the fourth ALPM to perform the present dehydration when the dehydration is performed, and the second reference eccentricity value is differently set for each course programmed in the washing machine, It is characterized in that it is set differently according to the dehydration ALPM input by the user.

When the present dehydration step is completed, as in the section G shown in FIG. 3, the drive motor 30 is turned off and stops after the rotation of the force is advanced, and the dehydration step is finished.

Dehydration control method of the washing machine of the present invention is configured as described above, if the detected eccentricity value of the dehydration load and the detected sensed eccentricity value is higher than the reference eccentric value, the drive motor of the dehydration determined during the operation operation of the washing machine By lowering the ALPM to perform the dehydration, there is an effect of improving the stability of the washing machine by reducing the vibration or noise generated during the implementation of the dehydration.

Claims (6)

Detecting an eccentric value of the dewatering load; And If the sensed eccentricity value is higher than the reference eccentricity value, driving the drive motor to a lower first bone dehydration AlpM (RPM) determined during the operation operation of the washing machine to a lower second bone dehydration ALMP to perform the main dehydration; Dewatering control method of the washing machine characterized in that. The method of claim 1, The reference eccentric value is a dehydration control method of the washing machine, characterized in that differently set according to the dehydration alpha input by the user. The method of claim 1, And the reference eccentric value is set differently for each course programmed in the washing machine. The method of claim 1, The second dewatering AlPM is a dehydration control method of the washing machine, characterized in that the ALMP determined by the user's dehydration ALPM input. The method of claim 1, The second dewatering AlPM is a dehydration control method of the washing machine, characterized in that the ALMP determined by the user's course input. The method of claim 1, The second main dewatering AlPM is selected from a lower level than the level belonging to the first main dehydration ALMP among a plurality of main dehydration ALMP consisting of a plurality of speeds for each ALMP, dehydration control method of a washing machine.

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