KR100565530B1 - How to control dehydration of the washing machine - Google Patents

Abstract

The dehydration control method of the washing machine according to the present invention sets the reference eccentricity in the direction in which the vibration of the tub is larger than the reference eccentricity in the direction in which the vibration of the tub is small, preventing the dehydration entry until the eccentricity in the direction of the vibration is small. Is prevented from over-vibration, and the direction of the small vibration of the tub makes the reference eccentricity relatively large, making it easier to enter the spin.

Washing machine, tub, drum, drying device, standard eccentricity, over vibration

Description

Dehydration control method of washing machine             

1 is an internal configuration of a washing machine according to the prior art,

2 is a perspective view of the front and top of the washing machine according to the prior art opened;

3 is a flowchart illustrating a dehydration stroke of a washing machine according to the prior art;

4 is a graph showing a motor RMP according to time during the dehydration stroke of the washing machine according to the present invention;

5 is a flowchart illustrating a dehydration stroke of the washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

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 to determine whether or not dehydration in consideration of the vibration of the tub is generated differently when the drum is rotated clockwise and counterclockwise. It is about.

In general, a washing machine is a device for removing contaminants on a fabric by using a detergent and water, and recently, various auxiliary devices such as a drying device for drying a fabric are connected to a tub.

1 is an internal configuration diagram of a washing machine according to the prior art, Figure 2 is a perspective view of the front and top of the washing machine according to the prior art opened.

1 and 2, the conventional washing machine is rotatable in the casing (2), the tub (10) mounted inside the casing (2) to contain wash water, and the tub (10). The drum (20) in which the fabric (m) is accommodated, the motor (30) for supporting the drum (20) and rotatingly driven therein, and the air in the drum (20) are sucked in to condense and heated. It comprises a drying device 40 for drying the cloth (m) by circulating into the drum (20).

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.

The tub 10 is connected like a suspension to a spring 5 connected to the upper portion of the casing 2 and is supported by a damper 6 mounted on the lower portion of the casing 2 to be supported slowly.

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 as a bearing to the tub 10 while the rotating shaft penetrates the tub 10, and its tip is connected to the drum 20.

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

The drying apparatus 40 communicates with the condensation duct 42 connected to one side of the tub 10, a cooling water nozzle 44 for flowing cooling water into the condensation duct 42, and the condensation duct 42. The fan 45 and the heater 46 are built in, and are composed of a drying duct 48 for circulating air of high temperature and low humidity into the drum 20.

In addition, the 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 washing machine, the control unit detects the quantity of the injected cloth (w) and the washing water level, washing according to the detected quantity Set the time, amount of detergent, rinsing and washing water.

The control unit controls the water supply device 12 for a set time according to the detected amount of water to supply washing water to a predetermined level in the washing machine, and the supplied washing water is supplied into the tub 10 and is contained in the tub 10. . 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 washing machine through the drainage device 14.

On the other hand, the washing machine performs a rinsing stroke several times to rinse the remaining foam on the cloth (m), 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 foam, is then drained out of the washing machine through the drain 14.

After several rinsing cycles as described above, the washing machine has a dehydration stroke for centrifugal dehydration of water of the fabric (m).

The dehydration stroke consists of a dose detection to detect the quantity of water to determine the optimum dehydration time or dehydration ALPM, an eccentricity detection to detect the eccentricity to determine the entry or release of the present dehydration, and a motor (30) after the dose or eccentricity detection. ) Is made of bone dehydration controlling high speed.

3 is a flowchart illustrating a dehydration stroke of a washing machine according to the prior art.

As shown in FIG. 3, when the washing or rinsing stroke is finished, the washing machine performs quantity detection and eccentricity detection.

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 turned off are measured to sense the amount of gas.

In addition, the eccentricity detection drives the motor 30 so that the drum 20 is rotated in one of clockwise and counterclockwise directions (for example, clockwise), and the amount of eccentricity during the driving of the motor 30. (UB ₁ ) is detected. (S2, S3)

Then, if the sensed eccentricity UB ₁ is smaller than the reference eccentricity Pass UB for determining the dehydration entry, the dehydration is performed in the direction in which the drum 20 is rotated (clockwise). (S4, S5 )

On the other hand, if the detected amount of eccentricity UB ₁ is greater than or equal to the reference eccentricity Pass UB, it is determined that the amount of eccentricity UB ₁ is excessive, and the apparatus performs overfolding and performs eccentricity detection again.

The washing machine reversely drives the motor 30 so that the drum 20 is rotated in a different direction (for example, counterclockwise) between a clockwise direction and a counterclockwise direction, and the amount of ALPM change during reverse driving of the motor 30 is performed. Rediscover the eccentricity (UB ₂ ) using (S7, S3)

Then, if the redetected eccentricity UB ₂ is smaller than the reference eccentricity Pass UB for dehydration entry, the dehydration is performed in the direction in which the drum 20 is reversely rotated (clockwise), and the redetected eccentricity If (UB ₂ ) is equal to or greater than the reference eccentricity (Pass UB), it is determined that the eccentricity (UB ₂ ) is excessive, and the eccentricity is detected again after re-inflating, and then the detected eccentricity (UB ₃ , UB) ₄ , .....) repeats the comparison with the forward, reverse rotation and eccentricity detection of the drum 20 as described above and inflates until the reference amount of eccentricity is less than the Pass UB.

On the other hand, the present dehydration is made of the optimum dehydration time or dewatering AlPM by the amount of detected by the quantity detection, the fabric is a high-speed centrifugal dehydration.

Thereafter, the washing machine is operated after the drying device 40 after the dehydration as described above to dry the fabric.

However, in the conventional washing machine, when the drying device 40 is mounted to the one side of the left and right sides of the tub 10 biasedly or the tub 10 is asymmetrically connected to the spring 5 or the damper 6, the tub Vibration of (10) is generated differently in the clockwise and counterclockwise direction, the tub 10 hits the casing (2), the drying apparatus 40 and the like, there is a problem that over-vibration occurs.

On the other hand, if the reference eccentricity (Pass UB) is set to prevent the movement of the washing machine as low, there is a problem that the number of repetitions of the eccentricity detection and inflated is increased to fail to enter the dehydration or to delay the entire dehydration time.

The present invention has been made to solve the above problems of the prior art, by setting a different amount of reference eccentricity for the clockwise rotation and counterclockwise rotation of the drum, to prevent over-vibration of the washing machine to facilitate dehydration entry of the washing machine The purpose is to provide a dehydration control method.

Dehydration control method of the washing machine according to the present invention for solving the above problems is characterized in that the reference eccentric amount for determining the dehydration entry of the washing machine is set differently for clockwise rotation and counterclockwise rotation of the drum.

In addition, the reference eccentricity is characterized in that the reference eccentricity in the direction of the large vibration of the tub is set lower than the reference eccentricity in the direction of the small vibration of the tub.

In addition, the reference eccentricity is characterized in that the reference eccentricity in the direction in which the drying apparatus is mounted is set lower than the reference eccentricity in the opposite direction.

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

Figure 4 is a graph showing the motor ALPM with time during the dehydration stroke of the washing machine according to the present invention, Figure 5 is a flow chart showing the dehydration stroke of the washing machine according to the present invention.

4 and 5, the dehydration control method of the washing machine according to the present embodiment includes a quantity detection (a section) for detecting a quantity of quantity, an eccentricity sensing (b section, a section of b ′) for detecting an amount of eccentricity, The eccentric loosening (c section) and the main spinal spin (d section) for rotating the drum at high speed for dewatering the fabric.

The poryang detected (a range) are rpm of motor (rpm) a first set rpm (rpm _1), the first set for the acceleration of the motor, and reaches a first predetermined rpm (rpm _1), the set time to reach the rpm (rpm ₁ ), The motor is turned off, and the quantity is detected by measuring the pulse width modulation (PWM) duty value until the end of the constant speed maintenance and the rotation angle of the force after the motor is turned off.

The dose sensing is a sensing dose by adding a value obtained by multiplying a measured pulse width modulation (PWM) duty value by a proportional constant and a value obtained by multiplying a rotation angle by a proportional constant.

Here, the quantity detection may be selected as a quantity by performing the driving and calculation of the motor as described above once, and is carried out two or more times to calculate the quantity detected in each quantity detection by a specific calculation formula to select the quantity. Of course it is possible.

The eccentric detection (b section) causes the drum 20 to rotate in one of clockwise and counterclockwise directions (for example, counterclockwise).

The rpm (rpm) of the motor the second predetermined rpm _{(rpm 2, rpm 2> rpm} 1) a second set for the set time reaches the acceleration of the motor, and the second predetermined rpm (rpm ₂₎ to reach the rpm (rpm ₂₎ After maintaining the motor off, and detects the amount of eccentric (UBccw ₁ ). (S13)

In the eccentric detection (b section), the rpm ripple while the constant speed is maintained at the second set Rpm (rpm ₂ ) is set as the eccentric amount (UBccw ₁ ).

Then, if the detected amount of eccentricity UBccw ₁ is smaller than the first reference eccentric amount Pass UBccw, dehydration (d section) is performed in the direction in which the drum is rotated (for example, counterclockwise). S15)

Here, the first reference eccentric amount Pass UBccw is a reference eccentric amount for determining the main dehydration entry in the direction in which the drum is rotated.

The dehydration (d section) accelerates the motor until the third set ALPM (rpm ₃ , rpm ₃ > rpm ₂ ) determined by the detected quantity detected in the dose detection, and reaches the third set ALPM, The motor is turned off after the third set ALPM is maintained for the set time determined by the detected amount in the dose detection.

On the other hand, if the detected amount of eccentricity UBccw ₁ is equal to or greater than the first reference eccentric amount Pass UBccw, it is determined that the eccentricity UBccw ₁ is excessive, and then the inflating (section c) is performed.

The poplar (c section) drives the motor forward and reverse so that the clockwise rotation and the counterclockwise rotation of the drum are alternately performed.

The washing machine rotates the rotation direction of the drum 20 in a direction opposite to the initial eccentricity detection (for example, in a clockwise direction) after the unwinding (section c).

After rpm (rpm) of the motor is maintained to the second set rpm (rpm ₂₎ a second set for the set time reaches the acceleration of the motor, and the second predetermined rpm (rpm ₂₎ to reach the rpm (rpm ₂₎ motor OFF and rediscover the eccentricity (UBcw ₁ ). (S18)

The eccentricity detection (b ′ section) sets the amount of rpm ripple while the constant speed is maintained as the detected eccentricity UBcw ₁ .

Then, if the redetected eccentricity UBcw ₁ is less than the second reference eccentricity Pass UBcw for determining this dehydration entry, the direction in which the drum was rotated for eccentricity rediscovery (eg clockwise). Dehydration (d section) is performed. (S19, S15)

On the other hand, if the redetected eccentricity UBcw ₁ is greater than or equal to the second reference eccentricity Pass UBcw, it is determined that the eccentricity UBcw ₁ is excessive and re-inflates the overlapping (c section) (S20).

Here, the second reference eccentric amount Pass UBcw is a reference eccentric amount with respect to the rotation of the tub in the direction in which the vibration of the tub is large (for example, clockwise) during the clockwise rotation and the counterclockwise rotation of the drum. It is set smaller than (Pass UBccw).

That is, the reference eccentricity in the direction where the vibration of the tub is large (for example, clockwise) is set lower than the reference eccentricity in the direction where the vibration of the tub is small (for example, counterclockwise), so that the detection eccentricity in the direction where the vibration is large This prevents the dehydration from entering the casing or the drying apparatus until it becomes small, and the direction in which the vibration of the tub is small (for example, the counterclockwise direction) increases the reference eccentricity relatively to facilitate dehydration. do.

In addition, the second reference eccentric amount Pass UBcw is a reference eccentric amount in a direction in which the drying apparatus is mounted (for example, in a clockwise direction).

On the other hand, the washing machine compares the clockwise / counterclockwise rotation and eccentricity detection (b section, b ′ section) of the drum after the re-execution of the overlapping section (c section) and the inflated (c section). Repeat.

That is, the washing machine detects the amount of eccentricity again while rotating the drum in the same direction as the initial eccentricity detection (for example, counterclockwise) after the resumption of the inflated portion (c section). _2, UBccw ₃ , .... ) Is smaller than the first reference eccentricity (Pass UBccw), the spin dewatering in the rotational direction is performed, and the rotational direction of the drum 20 is switched in the opposite direction to the initial eccentricity detection (for example, clockwise). Detects the amount of eccentricity while rotating and detects the amount of eccentricity (UBcw _2, UBcw ₃ , .... ) Becomes smaller than the second reference eccentric amount Pass UBcw, the main dehydration in the direction of rotation is performed.

The dehydration control method of the washing machine according to the present invention configured as described above sets the reference eccentricity in the direction in which the vibration of the tub is larger than the reference eccentricity in the direction in which the vibration of the tub is small, so that the eccentricity in the direction of the large vibration of the tub is reduced. By preventing dehydration entry until the washing machine is overvibrated, the direction in which the vibration of the tub is small increases the reference eccentricity relatively, making it easier to enter dehydration.

Claims (3)

The dehydration control method of the washing machine, characterized in that the reference eccentricity for determining the dewatering entry of the washing machine is set differently for clockwise rotation and counterclockwise rotation of the drum. The method of claim 1, The reference eccentric amount is a dehydration control method of a washing machine, characterized in that the reference eccentric amount in the direction of the vibration of the tub is set smaller than the reference eccentricity in the direction of the vibration of the tub. The method of claim 1, The reference eccentric amount is a dehydration control method of a washing machine, characterized in that the reference eccentricity in the direction in which the drying apparatus is mounted is set smaller than the reference eccentricity in the opposite direction.

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