KR20070015292A - Control method of drum type washing machine - Google Patents

Abstract

A dewatering control method of a drum-type washing machine is provided to prevent vibration and noise generated due to opposite eccentricity by entering a main dewatering step after removing the opposite eccentricity. A dewatering control method of a drum-type washing machine comprises the steps for accelerating a motor rotating a drum in a dewatering step(S1); constantly controlling the motor(S2); comparing the eccentricity at the accelerating step with the eccentricity at the constant step which is multiplied by a proportional constant(S3); judging as opposite eccentricity if the eccentricity of the accelerating step is over the constant step eccentricity multiplied by the proportional constant(S4); temporarily dewatering to remove the opposite eccentricity if it is judged as the opposite eccentricity(S5); and detecting eccentricity again by constantly controlling the motor, temporarily dewatering if the eccentricity is over a basis eccentricity value, and otherwise mainly dewatering the laundry(S6,S7,S8). Each eccentricity value is a maximal eccentricity value at the accelerating step or the constant step.

Description

Control method of drum washing machine {Control method of drum type washing machine}

1 is a longitudinal sectional view showing the internal configuration of a drum washing machine according to the prior art,

FIG. 2 is a front schematic view when a pair of eccentricity occurs in the drum shown in FIG. 1;

3 is a schematic side view when a pair of eccentricity occurs inside the drum shown in FIG. 1;

4 is a flowchart of one embodiment of a method for controlling dehydration of a drum washing machine according to the present invention;

5 is a graph showing the motor RMP according to the time during the dehydration stroke of the drum washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

A: acceleration stage B: constant speed stage

C: Gan G phase D: Constant speed stage

E: Intermittent Stage F: Constant Speed Stage

G: main stage

The present invention relates to a method for controlling dehydration of a drum washing machine, and more particularly, to a method for controlling dehydration of a drum washing machine, in which the dehydration is performed after sensing the eccentricity to solve the eccentricity.

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.

1 is a longitudinal cross-sectional view showing the internal configuration of the drum washing machine according to the prior art, Figure 2 is a front schematic view when a pair of eccentricity occurs in the interior of the drum shown in Figure 1, Figure 3 is shown in Figure 1 This is a schematic side view when paired eccentricity has occurred inside the drum.

Conventional drum washing machine, as shown in Figure 1, the casing (2), the inside of the casing (2) is a tub containing the wash water during washing or rinsing stroke and the dewatered water from the fabric during the dehydration stroke ( 10) and a drum 20 rotatably positioned inside the tub 10 to accommodate the cloth m, and a motor 30 supporting and rotating the drum 20. It is composed.

The casing 2 has an entrance hole 2a formed on one surface thereof so that the fabric m can enter and exit, and a door 4 for opening and closing the entrance hole 2a is mounted.

It is connected to the spring (5) connected to the upper portion of the casing (2), it is mounted on the damper (6) mounted on the lower portion of the casing (2) is supported slowly.

The tub 10 has an opening hole 11 formed at the rear of the gun entrance hole 2a.

The tub 10 is connected to a water supply device 12 for supplying the wash water supplied from the outside into the tub 10 and a drainage device 14 for draining the wash water in the tub 10 to the outside is connected. do.

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

The motor 30 is supported by a bearing to the tub 10 while the rotary shaft 32 penetrates the tub 10, and its tip is connected to the drum 20.

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

In addition, the drum washing machine further includes a control unit for controlling the water supply device 12, the drainage device 14, and the motor 30 according to a user's manipulation or detected amount and eccentricity.

Looking at the operation of the prior art configured as described above are as follows.

First, after inserting the cloth (m) into the drum 20, close the door (4), operate the drum washing machine, the control unit detects the quantity of the injected cloth (w) and the washing water level according to the detected quantity, Set the washing time, detergent amount, rinsing and washing water flow.

The controller controls the water supply device 12 for a set time according to the detected quantity of water to supply washing water to a predetermined level in the drum washing machine, and the supplied washing water is supplied into the tub 10 to be contained in the tub 10. do. Then, the control unit rotates the drum 20 by driving the motor 30 at a set rotation speed for a set time, the time (m) accommodated inside the drum 20 is dropped when the action of the washing water. After the washing stroke is completed, the contaminated washing water in the tub 10 is drained to the outside of the drum washing machine through the drainage device 14.

On the other hand, the drum washing machine is a rinsing stroke for rinsing the foam remaining in the cloth (m) several times, and controls the water supply device 12 and the motor 30 in accordance with the detected amount of water, such as the washing stroke. The contaminated water, including the foam, is then drained out of the drum washing machine via the drain 14.

After the above several rinsing strokes, the drum washing machine has a dewatering stroke for centrifugal dehydration of water of the fabric (m).

The dehydration stroke may include a quantity detection for detecting a quantity of water to determine an optimum dehydration time or a dehydration ALPM, an eccentricity detection for detecting an eccentric value for determining the entry or release of a main stage, and a motor after the quantity detection or the eccentricity detection. It is made up of a detachment step of controlling 30 at high speed.

The quantity detection starts the motor 30 to maintain a constant speed for a predetermined time, then turns off the motor 30, and pulse width modulation (PWM) duty from the start of the motor 30 to the end of the constant speed maintenance. The value and the amount of force rotation after the motor 30 is off are measured to detect the amount of air.

Then, the drum washing machine rotates the drum 20 in one direction to detect an eccentric value.

If the drum washing machine detects that the detected eccentricity is less than or equal to the reference eccentricity, the drum washing machine determines that the cloth is not eccentric and rotates the drum 20 at a high speed in a direction in which the drum washing machine is rotated.

On the other hand, the drum washing machine determines that the detected eccentricity is larger than the reference eccentricity value, and performs unfolding to agitate the drum 20 left and right by determining that the eccentricity is larger, and then the detected eccentricity value is less than or equal to the reference eccentricity value. The eccentricity detection, the comparison and the unfolding are repeated until the eccentric value is detected. When the sensed eccentricity value is less than or equal to the reference eccentric value, the detachment step is performed.

Then, the drum washing machine is performed in the dehydration time set in the quantity detection, the dehydration ALPM to centrifugal dewatering the fabric at high speed, the drainage device 14 to the outside of the drum washing machine When the dehydration time has elapsed, the drum washing machine stops the drum 20 to end the dehydration stroke of the drum washing machine.

However, in the dehydration control method of the conventional drum washing machine, the carriage is symmetrically distributed in the front upper side and the rear lower side inside the drum 20 as shown in FIGS. If the detected eccentricity value is detected below the reference eccentricity value and is incorrectly judged not to be eccentric, the vibration and noise of the drum washing machine due to the paired eccentricity are increased during the subsequent high speed separation step, and the internal structure of the drum washing machine is increased. There is an unstable problem.

The present invention has been made to solve the above problems of the prior art, when dehydration administration detects whether the eccentricity before entering the stage of separation, if it is determined to be a pair eccentricity to prevent entering the separation phase and eliminating the pair eccentricity step The purpose of the present invention is to provide a method for controlling dehydration of a drum washing machine that can prevent vibration and noise caused by pair eccentricity that is not detected in conventional eccentric detection.

An acceleration step of accelerating the motor for rotating the drum during the dehydration stroke of the drum washing machine according to the present invention for solving the above problems; A constant speed step of controlling the motor at a constant speed after the acceleration step; A comparison step of comparing the magnitude of the eccentricity value of the acceleration step and the value obtained by multiplying the eccentricity value of the constant speed step by a proportional constant; A pair of eccentricity determination step of judging as an eccentricity if the eccentricity value of the acceleration step is greater than the value obtained by multiplying the eccentricity value of the constant speed step by a proportional constant; If it is determined that the paired eccentricity determination, characterized in that it comprises a simple depilation step for performing a simple dehydration so that the eccentricity can be resolved.

The eccentric value of the acceleration step is characterized in that the maximum eccentric value of the acceleration step.

The eccentric value of the constant speed step is characterized in that the maximum eccentric value of the constant speed step.

The proportional constant is characterized in that 8.

In the intermittent step, the motor is accelerated to an ALMP higher than the constant speed step and decelerated to an ALMP of the constant speed step.

In the dehydration control method of the drum washing machine, the eccentric value is re-detected while the motor is controlled at a constant speed after the deciphering step, and if the detected eccentric value exceeds the reference eccentric value, the interleaving step is repeated; It characterized in that to perform.

In the dehydration control method of the drum washing machine, the dehydration control method of the drum washing machine, characterized in that the reclamation step and the eccentric value re-sensing is repeated until the eccentric value is less than the set eccentric value.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a flow chart of an embodiment of the dehydration control method of the drum washing machine according to the present invention, Figure 5 is a graph showing the motor RMP with time during the dehydration stroke of the drum washing machine according to the present invention.

Hereinafter, the configuration of the drum washing machine to which the dewatering control method of the drum washing machine according to the present invention is applied will be described using the same reference numerals as in the related art.

In the dehydration control method of the washing machine according to the present embodiment, as shown in FIGS. 4 and 5, the motor 30 is accelerated so that the RPM of the motor 30 reaches the first set RPM (eg, 108 rpm). In addition, while the motor 30 is being accelerated and controlled, the eccentricity value due to the eccentricity of the gun positioned inside the drum 20 is sensed. (S1, A section)

Here, the eccentric value of the acceleration step (section A) is the maximum eccentric value UBmax of the acceleration step (section A), and divides the section of the acceleration step (section A) into several sections, each section The maximum eccentric value among the eccentric values of is determined as the eccentric value of the acceleration step.

When the RPM of the motor 30 reaches the first set RPM1, the motor 30 is controlled to maintain the first set RPM1, and the eccentric value is controlled while the motor 30 is controlled at constant speed. (S2, B section)

Here, the eccentricity value of the constant speed step (Section B) is one of the maximum eccentricity value of the constant speed step and the eccentricity value at the end of the constant speed step (Section B), hereinafter the maximum eccentric value UB1 at the end of the constant speed step. It demonstrates only to.

Then, the magnitude of the value obtained by multiplying the eccentricity value UBmax of the acceleration step (section A) by the proportional constant K is multiplied by the eccentric value UB1 of the constant speed step (section B) (S3).

Here, the proportional constant (K) is a value determined through several experiments and the like. Since the eccentric value UBmax of the acceleration stage and the eccentric value UB1 of the constant speed stage generally have a large difference, these two It is a value for adjusting values to a reasonably approximate value, and it is most preferable to limit it to 8 as a result of several experiments.

As a result of the comparison of the magnitudes, if the eccentricity value UBmax of the acceleration step is larger than the value obtained by multiplying the eccentricity value UB1 of the constant speed step by the proportional constant K, it is determined as an eccentricity. (S4)

That is, when the degree of vibration of the drum in the acceleration step (Section A) is greater than the degree of vibration of the drum 30 in the constant speed step (Section B), it is determined that a pair eccentricity is generated.

If it is determined as the eccentric pair determination as described above, the drum washing machine performs the de-interval step (Section C: simple dehydration) without entering the main step (main dehydration). (S5)

In the intermittent step (Section C), the motor 30 is accelerated to a second ALPM (rpm2) higher than the first ALPM (rpm1) in the constant speed step (Section B), and then decelerated to ALPM (rpm1) in the constant speed step. , Drain some water.

As described above, when the inter-department step (section C) is performed, the pair of eccentric fabrics are different from each other in the amount of water drained by the inter-department step (section C), and the pair eccentricity is resolved.

When the RPM of the motor 30 reaches the first RPM1 by the intermittent step (section C), while the motor 30 is controlled at constant speed with the first RPM1, the eccentric value ( UB ') is detected again (S6, D section).

Then, the redetected eccentric value UB 'is compared with the reference eccentric value Pass UB (S7).

Here, the reference eccentric value Pass UB is an eccentric value set in advance to determine whether to enter the detachment step (section G) or the detachment step (section E) to be described later.

If the redetected eccentricity value UB 'exceeds the reference eccentricity value Pass UB, the intermittent step E is repeated.

In the dehydration control method of the drum washing machine, when the inter-detachment step E is performed again, the inter-detachment step E section is performed until the redetected eccentric value UB 'becomes equal to or less than the reference eccentric value Pass UB. Repeat eccentric value detection (section D).

On the other hand, when the redetected eccentricity value UB 'exceeds the reference eccentricity value Pass UB, a separation step (G section) is performed. (S8)

The motor 30 is accelerated to a third Rpm (eg, 1000 rpm) higher than the first Rmp1 and the second Rpm (rpm2) during the separation step, and the predetermined time at the third Rpm (rpm3). Is controlled during constant speed.

Thereafter, the motor 30 is turned off and stopped after the rotation of the force (H section), the dehydration stroke is finished.

On the other hand, in the dehydration control method of the washing machine, if the eccentric value (UBmax) of the acceleration step is less than or equal to the value obtained by multiplying the eccentric value (UB1) of the constant speed step by the proportional constant (K), it is determined that the eccentricity is not an eccentricity Then, the eccentricity is judged by determining whether the eccentricity is performed. (S3) (S5) (S9)

That is, the eccentric value UB1 of the constant speed step (section B) is compared with the reference eccentric value Pass UB, and if the eccentric value UB1 exceeds the reference eccentric value Pass UB, the intermittent step (section C) If not, perform the separation step (G section).

In the dewatering control method of the washing machine of the present invention configured as described above, the constant speed control is performed after acceleration control of the motor rotating the drum, and the magnitude of the value obtained by multiplying the eccentricity value of the acceleration stage and the eccentricity value of the constant speed stage by a proportional constant In comparison, when the eccentricity value of the acceleration stage is larger than the eccentricity value of the constant speed stage multiplied by the proportional constant, it is determined as an eccentricity, and thus it is possible to detect an unbalanced eccentricity which is not detected in the normal eccentricity detection. By implementing the eccentricity can be eliminated and there is an advantage that can prevent the vibration and noise caused by the eccentricity in the subsequent step of separation.

Claims (7)

An acceleration step of accelerating a motor for rotating the drum during the dewatering stroke of the drum washing machine; A constant speed step of controlling the motor at a constant speed after the acceleration step; A comparison step of comparing the magnitude of the eccentricity value of the acceleration step and the value obtained by multiplying the eccentricity value of the constant speed step by a proportional constant; A pair of eccentricity determination step of judging as an eccentricity if the eccentricity value of the acceleration step is greater than the value obtained by multiplying the eccentricity value of the constant speed step by a proportional constant; Determination control method of the drum washing machine, characterized in that it comprises a simple dehydration step of performing a simple dehydration so that the paired eccentricity can be resolved when judged by the pair eccentricity determination. The method of claim 1, The eccentric value of the acceleration step, the dehydration control method of the drum washing machine, characterized in that the maximum eccentric value of the acceleration step. The method of claim 1, The eccentric value of the constant speed step, the dehydration control method of the drum washing machine, characterized in that the maximum eccentric value of the constant speed step. The method of claim 1, The proportionality constant is 8, the dehydration control method of the drum washing machine. The method of claim 1, The degassing step, the dehydration control method of the drum washing machine, characterized in that to accelerate the motor up to the ALMP higher than the constant speed step to the ALMP of the constant speed step. The method according to any one of claims 1 to 5, In the dehydration control method of the drum washing machine, the eccentric value is re-detected while the motor is controlled at a constant speed after the deciphering step, and if the detected eccentric value exceeds the reference eccentric value, the interleaving step is repeated; Dewatering control method of the drum washing machine characterized in that for implementing. The method of claim 6, In the dehydration control method of the drum washing machine, the dehydration control method of the drum washing machine, characterized in that the reclamation step and the eccentric value re-sensing is repeated until the eccentric value is less than the set eccentric value.

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