KR20180119012A - Laundry treatment machine - Google Patents

Abstract

The present invention relates to a laundry treatment machine. According to an embodiment of the present invention, the laundry treatment machine comprises: a casing; a washing tank in the casing; a ball balancer disposed on at least one side of the washing tank and having a plurality of balls and a guide unit guiding movement of the plurality of balls; a door attached to the casing for opening and closing; a motor rotating the washing tank; a driving unit driving the motor; and a control unit controlling the washing tank to enable the same to be rotated at a first speed in the dehydration mode, rotated at a second speed lower than the first speed so as to disperse the plurality of balls when an amount of the laundry is equal to or lower than a predetermined value and an eccentric volume during the first speed rotation is equal to or more than a first reference value, and rotated at a third speed higher than the first speed when an eccentric volume during the second speed rotation is equal to or lower than a second reference value. Accordingly, the plurality of balls can be prevented from moving unbalanced in the dehydration mode so that dehydration can be stably performed.

Description

[0001] Laundry treatment machine [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laundry processing apparatus, and more particularly, to a laundry processing apparatus capable of stably performing dehydration by preventing a plurality of balls from being unbalanced in a dehydration mode.

In general, the laundry processing apparatus performs washing using the friction force between the washing tub and the laundry, which is rotated by receiving the driving force of the motor while the detergent, the washing water, and the laundry are put in the washing tub, You can get a washing effect.

On the other hand, ball balance is used to improve the eccentricity of the laundry processing apparatus. However, such a ball balance is effective when there is a load variation in the washing tub, and there is a problem that a plurality of balls operate in unbalance in a dehydration mode in which there is little load variation in the washing tub.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laundry processing apparatus capable of reliably performing dehydration by preventing a plurality of balls from operating as unbalanced in a dehydration mode.

According to an aspect of the present invention, there is provided a laundry processing apparatus comprising a casing, a washing tub in the casing, and a guide unit disposed at least on one side of the washing tub and including a plurality of balls and guide members for guiding movement of the plurality of balls A motor for rotating the washing tub, and a driving unit for driving the motor. In the dehydrating mode, the washing tub is rotated at a first speed so that the tub is rotated at a predetermined speed, When the amount of eccentricity during the first speed rotation is equal to or greater than the first reference value, the washing tub is rotated at a second speed lower than the first speed so that a plurality of balls are dispersed. When the amount of eccentricity during the second speed rotation is equal to or less than the second reference value, And a control unit for controlling the motor to rotate at a higher third speed.

According to another aspect of the present invention, there is provided a laundry processing apparatus including a casing, a washing tub in a casing, at least one side of a washing tub, and configured to guide a movement of a plurality of balls, A motor for rotating the washing tub, and a driving unit for driving the motor. In the dehydrating mode, the washing tub is rotated at a first speed, and the tub is rotated at a predetermined speed or less When the amount of eccentricity during the first speed rotation is equal to or greater than the first reference value, the washing tub is rotated at a second speed lower than the first speed so that a plurality of balls are dispersed. When the amount of eccentricity during the first speed rotation is less than the first reference value, And controls the motor to rotate at a third speed higher than the first speed.

A washing machine according to an embodiment of the present invention includes a casing, a washing tub in the casing, a ball balancer disposed at at least one side of the washing tub and including a plurality of balls and a guide unit for guiding movement of the plurality of balls, A motor for rotating the washing machine; a driving part for driving the motor; a driving part for rotating the washing machine at a first speed when the dehydration mode is selected; When the amount of eccentricity is equal to or greater than the first reference value, the washing tub is rotated at a second speed lower than the first speed so that a plurality of balls are dispersed. When the amount of eccentricity at the second speed rotation is equal to or less than the second reference value, So that in the dehydration mode, a plurality of balls are prevented from operating as unbalanced, and dehydration can be stably performed.

Particularly, by controlling so as to rotate at a third speed of the washing tub in a state in which a plurality of balls are dispersed, a plurality of balls can be prevented from operating as unbalanced, and dehydration can be stably performed.

In particular, by raising the speed of the washing tub so that a plurality of balls are dispersed and passing through the transient resonance section, the plurality of balls are prevented from operating as unbalanced so that dehydration can be stably performed.

Accordingly, in the transient resonance section, it is possible to prevent a short circuit phenomenon in which the washing tub is stopped due to excessive vibration.

As a result, the dehydration time in the dehydration mode can be reduced.

A washing machine according to another embodiment of the present invention includes a casing, a washing tub in the casing, a ball balancer disposed at at least one side of the washing tub and including a plurality of balls and a guide unit for guiding movement of the plurality of balls, A motor for rotating the washing machine; a driving part for driving the motor; a driving part for rotating the washing machine at a first speed when the dehydration mode is selected; When the amount of eccentricity is equal to or greater than the first reference value, the washing tub is rotated at a second speed lower than the first speed so that a plurality of balls are dispersed. When the amount of eccentricity during the first speed rotation is less than the first reference value, So that in the dehydration mode, a plurality of balls are prevented from operating as unbalanced, and dehydration can be stably performed.

1 is a perspective view illustrating a laundry processing apparatus according to an embodiment of the present invention.
FIG. 2 is a view showing a ball balancer formed on one side of the washing tub of FIG. 1. FIG.
3 is an internal block diagram of the laundry processing apparatus of FIG.
4 is an internal circuit diagram of the motor driving unit of FIG.
5 is an internal block diagram of the inverter control unit of FIG.
6A to 6C are diagrams referred to in explanation of the foreign matter dehydration mode.
7 is a flowchart illustrating an operation method of the laundry processing apparatus according to an embodiment of the present invention.
8 to 10 are diagrams referred to in the description of the operation method of Fig.

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

The suffix " module " and " part " for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms " module " and " part " may be used interchangeably.

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

The suffix " module " and " part " for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms " module " and " part " may be used interchangeably.

1 is a perspective view illustrating a laundry processing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a laundry processing apparatus 100 according to an embodiment of the present invention is a front load type laundry processing apparatus in which a bag is inserted into a washing tub in a front direction.

The laundry processing apparatus 100 is a drum type laundry processing apparatus comprising a casing 110 forming an outer appearance of the laundry processing apparatus 100 and a casing 110 disposed inside the casing 110, A drum 122 as a washing tub disposed inside the washing tub 120 and washing the washing tub 120; a motor 130 for driving the drum 122; (Not shown) for supplying washing water to the inside of the casing 110, and a drain (not shown) formed below the washing tub 120 for discharging washing water to the outside.

The drum 122 is provided with a plurality of through holes 122A through which wash water is passed. The drum 122 is lifted up to a certain height when the drum 122 rotates, (124) may be disposed.

The casing 110 includes a cabinet body 111 and a cabinet cover 112 disposed on the front surface of the cabinet body 111 and coupled to the cabinet body 111. The cabinet cover 112 is disposed above the cabinet cover 112, And a top plate 116 disposed on the control panel 115 and coupled to the cabinet main body 111. The cabinet main body 111 includes a top plate 116,

The cabinet cover 112 includes a catch and release hole 114 formed so as to be able to move in and out of the can and a door 113 arranged to be rotatable in the left and right direction so that the catch and release hole 114 can be opened and closed.

The control panel 115 includes operation keys 117 for operating the laundry processing apparatus 100 and a display 118 disposed on one side of the operation keys 117 and for displaying the operating state of the laundry processing apparatus 100 ).

The operation keys 117 and the display 118 in the control panel 115 are electrically connected to a control unit (not shown), and a control unit (not shown) electrically controls each component of the laundry processing apparatus 100 . The operation of the control unit (not shown) will be omitted with reference to the operation of the control unit 210 shown in Fig.

On the other hand, the drum 122 may be provided with autobalance. The auto balancer is for reducing vibrations generated according to the amount of eccentricity of the laundry contained in the drum 122, and may be realized by a liquid balancer, a ball balancer, or the like.

Although not shown in the drawing, the laundry processing apparatus 100 may further include a vibration sensing unit 197 (FIG. 2) for measuring the vibration amount of the drum 122 or the vibration amount of the casing 110.

FIG. 2 is a view showing a ball balancer formed on one side of the washing tub of FIG. 1. FIG.

Referring to the drawings, a laundry processing apparatus 100 is disposed at at least one side of a washing tub 120, and includes a plurality of balls 143aa to 143ae, a guide unit (not shown) for guiding movement of the plurality of balls 143aa to 143ae And a ball balancer 140 having a plurality of ball balancers 141a.

The figure illustrates that the ball balancer 140 is disposed at the first side end 145a of the door 113 in the side end portions 145a and 145b of the washing tub 120. [

The plurality of balls 143aa to 143ae in the guide portion 141a move in the direction opposite to the moving direction of the cloth in the washing tub 120 to improve the unbalance of the washing tub 120 Can play a role.

The ball balancer 140 may be further disposed at the second side end portion 145b of the opposite side end portions 145a and 145b of the washing tub 120 opposite to the door 113 although not shown in the drawing.

In the figure, the vibration sensing portion 197 for sensing the amount of vibration of the washing tub 120 is disposed on the second side end portion 145b of the washing tub 120. FIG.

The vibration amount information of the washing tub 120 sensed by the vibration sensing unit 197 may be transmitted to the control unit 210.

3 is an internal block diagram of the laundry processing apparatus of FIG.

The laundry processing apparatus 100 includes a motor 230 for rotating the washing tub 120, a driving unit 220 for driving the motor 230, an operation key 117, a display (not shown) A vibration sensing unit 197 for sensing the vibration of the washing tub 120 and a control unit 210 for controlling each unit in the laundry processing apparatus 100.

In particular, the control unit 210 can control the motor driving unit 220.

The laundry processing apparatus 100 can be controlled by a control operation of the control unit 210. [ In particular, the control unit 210 can control the motor driving unit 220.

The motor driving unit 220 drives the motor 230. Accordingly, the washing water is rotated by the motor 230 to the washing tub 120.

The control unit 210 receives an operation signal from the operation key 117 and performs an operation. Thus, washing, rinsing and dewatering can be performed.

In addition, the control unit 210 may control the display 118 to display a wash course, a wash time, a dehydration time, a rinse time, or a current operation state.

The control unit 210 controls the motor driving unit 220 and the motor driving unit 220 controls the motor 230 to operate. At this time, a position sensing unit for sensing the rotor position of the motor is not provided inside or outside the motor 230. That is, the motor driving unit 220 can control the motor 230 by a sensorless method.

The motor driving unit 220 drives the motor 230 and includes an inverter (not shown), an inverter control unit (not shown), an output current detection unit for detecting an output current flowing through the motor 230 ). Further, the motor driving unit 220 may be a concept further including a converter or the like that supplies DC power input to an inverter (not shown).

For example, the inverter control section (430 in Fig. 4) in the motor drive section 220 estimates the rotor position of the motor 230 based on the output current io. Then, based on the estimated rotor position, the motor 230 is controlled to rotate.

Specifically, the inverter control unit 430 of FIG. 4 generates a switching control signal (Sic in FIG. 4) of a pulse width modulation (PWM) method based on the output current io and outputs it to an inverter The inverter (not shown) performs a high-speed switching operation, and supplies an AC power of a predetermined frequency to the motor 230. Then, the motor 230 is rotated by an alternating current power source of a predetermined frequency.

The motor driver 220 will be described later with reference to FIG.

On the other hand, the control unit 210 can calculate the discharge amount based on the current (i _o ) detected by the current detection unit 220 and the like. For example, while the washing tub 120 rotates, the laundry amount can be calculated on the basis of the current value (i _o ) of the motor 230.

The control unit 210 may sense the amount of eccentricity of the washing tub 120, that is, the unbalance (UB) of the washing tub 120. [ Such eccentricity detection can be performed based on the ripple component of the current (i _o ) detected by the current detection unit 220 or the rotational speed variation amount of the washing tub 120.

Meanwhile, the vibration detecting unit 197 can detect the amount of vibration of the washing tub 120. The vibration amount information of the washing tub 120 sensed by the vibration sensing unit 197 may be transmitted to the control unit 210.

On the other hand, in the dehydration mode, the controller 210 rotates the washing tub 120 at the first speed, and when the amount of foam is less than or equal to a predetermined value and the amount of eccentricity during the first speed rotation is equal to or greater than the first reference value, The washing tub 120 is rotated at a second speed lower than the first speed so that the first and the second eccentricities 143aa to 143ae are dispersed and when the amount of eccentricity at the second speed rotation is equal to or lower than the second reference speed, Can be controlled. Thereby, in the dehydration mode, the plurality of balls 143aa to 143ae are prevented from operating as unbalance, and dehydration can be stably performed.

On the other hand, the control unit 210 controls the plurality of balls 143aa to 143ae to rotate at the third speed of the washing tub 120 in a dispersed state so that the plurality of balls 143aa to 143ae are not operated as unbalanced So that dehydration can be performed stably.

On the other hand, the control unit 210 raises the speed of the washing tub 120 so that the plurality of balls 143aa to 143ae are dispersed in the transient resonance period so that the plurality of balls 143aa to 143ae are unbalanced So that the dehydration can be stably performed.

Accordingly, in the transient resonance section, it is possible to prevent a short circuit phenomenon in which the washing tub 120 is stopped due to excessive vibration.

As a result, the dehydration time in the dehydration mode can be reduced.

The control unit 210 controls the washing tub 120 to stop when the amount of vibration of the washing tub 120 detected by the vibration detecting unit 197 is equal to or greater than the third reference value during the third speed rotation, 197) can be controlled to rotate at a fourth speed higher than the third speed when the amount of vibration of the washing tub 120 is less than the third reference value.

On the other hand, the control unit 210 calculates the amount of eccentricity during the first speed rotation, and calculates the amount of eccentricity before the eccentricity amount calculation.

On the other hand, the control unit 210 can rotate the washing tub 120 at the first speed before calculating the eccentricity amount, and calculate the laundry amount at the first speed rotation.

Meanwhile, the control unit 210 may rotate the washing tub 120 at a first speed so that the washing tub 120 is attached to the washing tub 120.

On the other hand, in the dehydration mode, the controller 210 rotates the washing tub 120 at the first speed, and when the amount of foam is less than a predetermined value and the amount of eccentricity at the first speed rotation is less than the first reference value, It can be controlled to rotate at a high third speed.

According to another embodiment of the present invention, in the dehydration mode, the controller 210 rotates the washing tub 120 at a first speed, and when the amount of foam is less than or equal to a predetermined value and the amount of eccentricity The washing tub 120 is rotated at a second speed lower than the first speed so that the plurality of balls 143aa to 143ae are dispersed. When the amount of eccentricity at the first speed rotation is less than the first reference value, It is possible to control to rotate at a higher third speed. According to this, in the dehydrating mode, the plurality of balls 143aa to 143ae do not operate as unbalanced, and dehydration can be stably performed.

4 is an internal circuit diagram of the motor driving unit of FIG.

The motor driving unit 220 according to the embodiment of the present invention drives the motor of the sensorless type and includes a converter 410, an inverter 420, an inverter control unit 430, A voltage detector B, a smoothing capacitor C, an output current detector E, and an output voltage detector F. The motor driving unit 220 may further include an input current detection unit A, a reactor L, and the like.

The reactor L is disposed between the commercial AC power source 405 (v _s ) and the converter 410, and performs a power factor correcting or boosting operation. The reactor L may also function to limit the harmonic current due to the fast switching of the converter 410.

The input current detection section A can detect the input current (i _s ) input from the commercial AC power source 405. To this end, a current transformer (CT), a shunt resistor, or the like may be used as the input current detector A. The detected input current i _s can be input to the inverter control unit 430 as a discrete signal in the form of a pulse.

The converter 410 converts the commercial AC power source 405, which has passed through the reactor L, into DC power and outputs the DC power. Although the commercial AC power source 405 is shown as a single-phase AC power source in the figure, it may be a three-phase AC power source. The internal structure of the converter 410 also changes depending on the type of the commercial AC power source 405.

Meanwhile, the converter 410 may include a diode without a switching element, and may perform a rectifying operation without a separate switching operation.

For example, in the case of a single-phase AC power source, four diodes may be used in the form of a bridge, and in the case of a three-phase AC power source, six diodes may be used in the form of a bridge.

On the other hand, the converter 410 may be, for example, a half-bridge type converter in which two switching elements and four diodes are connected, and in the case of a three-phase AC power source, six switching elements and six diodes may be used .

When the converter 410 includes a switching element, the boosting operation, the power factor correction, and the DC power conversion can be performed by the switching operation of the switching element.

The smoothing capacitor C smoothes the input power supply and stores it. In the drawing, one element is exemplified by the smoothing capacitor C, but a plurality of elements are provided so that the element stability can be ensured.

For example, when a direct current power from the solar cell is supplied to the smoothing capacitor C (not shown), the direct current power is supplied to the smoothing capacitor C It may be input directly or may be DC / DC converted and input. Hereinafter, the portions illustrated in the drawings are mainly described.

On the other hand, both ends of the smoothing capacitor C are referred to as a dc stage or a dc stage because the dc power source is stored.

The dc voltage detection unit B can detect the dc voltage Vdc at both ends of the smoothing capacitor C. [ For this purpose, the dc voltage detection unit B may include a resistance element, an amplifier, and the like. The detected dc voltage source Vdc can be input to the inverter control unit 430 as a discrete signal in the form of a pulse.

The inverter 420 includes a plurality of inverter switching elements and converts the smoothed DC power supply Vdc into a three-phase AC power supply va, vb, vc having a predetermined frequency by on / off operation of the switching element, And outputs it to the synchronous motor 230.

The inverter 420 includes a pair of upper arm switching elements Sa, Sb and Sc and lower arm switching elements S'a, S'b and S'c serially connected to each other, The switching elements are connected to each other in parallel (Sa & S a, Sb & S'b, Sc & S'c). Diodes are connected in anti-parallel to each switching element Sa, S'a, Sb, S'b, Sc, S'c.

The switching elements in the inverter 420 perform ON / OFF operations of the respective switching elements based on the inverter switching control signal Sic from the inverter controller 430. [ Thus, three-phase AC power having a predetermined frequency is output to the three-phase synchronous motor 230.

The inverter control unit 430 can control the switching operation of the inverter 420 based on the sensorless method. To this end, the drive controller 430, and outputs the output current (i _o) detected by the current detector (E), it may be an output voltage (v _o) detected by the output voltage detection unit (F).

The inverter control unit 430 outputs the inverter switching control signal Sic to the inverter 420 to control the switching operation of the inverter 420. [ Output voltage inverter switching control signal (Sic) is a switching control signal of a pulse width modulation (PWM), the output current (i _o) detected by the output current detector (E), detected by the output voltage detection unit (F) ( v _o ).

An output current detector (E) detects the inverter 420 and the three-phase motor output current (i _o) flowing between (230). That is, the current flowing in the motor 230 is detected. The output current detection unit E can detect all of the output currents ia, ib, ic of each phase or can detect the output currents of two phases using the three-phase balance.

The output current detection unit E may be located between the inverter 420 and the motor 230. For current detection, a current transformer (CT), a shunt resistor, or the like may be used.

Three shunt resistors are placed between the inverter 420 and the synchronous motor 230 or the three lower arm switching elements S'a, S'b, S'c To be connected to each other. On the other hand, it is also possible to use two shunt resistors using three phase equilibrium. On the other hand, when one shunt resistor is used, the shunt resistor may be disposed between the capacitor C and the inverter 420 described above.

The detected output current (i _o) are, as discrete signals (discrete signal) of the pulse type, may be applied to the inverter controller 430, the inverter switching control signal (Sic) based on the detected output current (i _o) Is generated. The output current (i _o) detected in the following may be written in parallel to the three-phase output currents (ia, ib, ic) of the.

On the other hand, the three-phase motor 230 has a stator and a rotor, and each phase alternating current power of a predetermined frequency is applied to a coil of a stator of each phase (a, b, c) .

The motor 230 may be, for example, a Surface Mounted Permanent Magnet Synchronous Motor (SMPMSM), an Interior Permanent Magnet Synchronous Motor (IPMSM) A synchronous motor (Synchronous Reluctance Motor; Synrm), and the like. Among them, SMPMSM and IPMSM are permanent magnet applied Permanent Magnet Synchronous Motor (PMSM), and Synrm is characterized by having no permanent magnet.

On the other hand, the inverter control unit 430 can control the switching operation of the switching element in the converter 410 when the converter 410 includes a switching element. For this purpose, the inverter control unit 430 can receive the input current (i _s ) detected by the input current detection unit (A). The inverter control unit 430 may output the converter switching control signal Scc to the converter 410 to control the switching operation of the converter 410. [ The converter switching control signal (Scc) is generated by a switching control signal of a pulse width modulation method (PWM), based on the input current (i _s) to be detected from the input current detecting unit (A) can be output.

5 is an internal block diagram of the inverter control unit of FIG.

5, the inverter control unit 430 includes an axis conversion unit 510, a speed calculation unit 520, a current command generation unit 530, a voltage command generation unit 540, an axis conversion unit 550, And a switching control signal output unit 560.

The axis converting unit 510 receives the output currents ia, ib, ic detected by the output current detecting unit E and outputs the two phase currents iα and iβ in the stationary coordinate system and the two- id, iq).

On the other hand, the axis converter 510 converts the two-phase currents (i? And i?) Of the stationary coordinate system, the two-phase voltages v? And v? Of the stationary coordinate system, the two- The two-phase voltage (vd, vq) of the rotating coordinate system can be output to the outside.

The speed calculating unit 520 receives the two-phase currents i alpha and i beta of the stationary coordinate system and the two-phase voltages v alpha and v beta of the stationary coordinate system from the axis converting unit 510, The rotor position [theta] and the speed [omega] can be calculated.

)와 속도 지령치(ω^* _r)에 기초하여, 전류 지령치(i^* _q)를 생성한다. 예를 들어, 전류 지령 생성부(530)는, 연산 속도(

)와 속도 지령치(ω^* _r)의 차이에 기초하여, PI 제어기(535)에서 PI 제어를 수행하며, 전류 지령치(i^* _q)를 생성할 수 있다. 도면에서는, 전류 지령치로, q축 전류 지령치(i^* _q)를 예시하나, 도면과 달리, d축 전류 지령치(i^* _d)를 함께 생성하는 것도 가능하다. 한편, d축 전류 지령치(i^* _d)의 값은 0으로 설정될 수도 있다. On the other hand, the current command generation section 530 generates the current command

(I ^* _q ) on the basis of the speed command value? ^* _R and the speed command value? ^* _R. For example, the current command generation unit 530 generates the current command

The PI controller 535 performs the PI control based on the difference between the speed command value? ^* _R and the speed command value? ^* _R , and generates the current command value i ^* _q . In the figure, the q-axis current command value (i ^* _q ) is exemplified by the current command value, but it is also possible to generate the d-axis current command value (i ^* _d ) unlike the figure. On the other hand, the value of the d-axis current command value i ^* _d may be set to zero.

On the other hand, the current command generation unit 530 may further include a limiter (not shown) for limiting the current command value i ^* _q so that the current command value i ^* _q does not exceed the allowable range.

Next, the voltage command generation unit 540 generates the voltage command generation unit 540 based on the d-axis and q-axis currents (i _d , i _q ) axially transformed into the two-phase rotational coordinate system in the axial conversion unit and the current command value the d-axis and q-axis voltage instruction values (v ^* _d , v ^* _q ) can be generated based on the d-axis voltage reference values i ^* _d and i ^* _q . For example, the voltage command generation unit 540 performs PI control in the PI controller 544 based on the difference between the q-axis current (i _q ) and the q-axis current command value (i ^* _q ) It is possible to generate the axial voltage command value v ^* _q . Further, voltage command generation unit 540, on the basis of the difference between the d-axis current (i _d) and, the d-axis current command value (i ^* _d), and performs the PI control in the PI controller (548), d-axis voltage It is possible to generate the command value v ^* _d . On the other hand, the value of the d-axis voltage command value v ^* _d may be set to zero corresponding to the case where the value of the d-axis current command value i ^* _d is set to zero.

The voltage command generator 540 may further include a limiter (not shown) for limiting the level of the d-axis and q-axis voltage command values v ^* _d and v ^* _q so as not to exceed the permissible range .

On the other hand, the generated d-axis and q-axis voltage command values (v ^* _d , v ^* _q ) can be input to the axial conversion unit 550.

)와, d축, q축 전압 지령치(v^* _d,v^* _q)를 입력받아, 축변환을 수행한다.The axis converting unit 550 converts the position of the computation position (

) And the d-axis and q-axis voltage command values (v ^* _d , v ^* _q ).

)가 사용될 수 있다.First, the axis converting unit 550 performs conversion from a two-phase rotating coordinate system to a two-phase stationary coordinate system. At this time, in the speed calculator 520,

) Can be used.

Then, the axis converting unit 550 performs conversion from the two-phase stationary coordinate system to the three-phase stationary coordinate system. Through such conversion, the axial conversion section 1050 can output the three-phase output voltage instruction values v ^* a, v ^* b, v ^* c.

The switching control signal output unit 560 generates an inverter switching control signal Sic according to the pulse width modulation (PWM) method based on the three-phase output voltage set values v ^* a, v ^* b and v ^* c And outputs it.

The output inverter switching control signal Sic may be converted into a gate driving signal in a gate driving unit (not shown) and input to the gate of each switching element in the inverter 420. Thus, each of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c in the inverter 420 can perform the switching operation.

6A to 6C are diagrams referred to in explanation of the foreign matter dehydration mode.

6A illustrates the insertion of a blanket 600, which is large in volume and hardly moves within the washing tub 120, in the washing tub 120. As shown in FIG.

Quilts are large in volume, but have a small volume. In particular, the blanket 600 may have a volume less than or equal to a predetermined value.

In the case of a blanket in which a plurality of balls 143aa to 143ae in a can and a ball balancer are separated from each other in the opposite direction and rotate but are large in volume and hardly move in the washing tub 120, The foil 600 and the plurality of balls 143aa to 143ae are arranged at the same position and rotated.

That is, since the plurality of balls 143aa to 143ae are rotated around the bobbin 600, they act as unbalance rather than as a balancer.

Accordingly, when the speed of the washing tub 120 is increased, a short circuit or demarcation occurs due to excessive vibration, and the rotation of the washing tub 120 must be stopped.

Fig. 6C shows a state in which when the third speed (V3) of the Pc section is short-circuited by transient vibration, or when the speed rises from the third speed (V3) to the fourth speed (V4) (V4) at the speed rotation, it is short-circuited by the transient vibration.

That is, in the transient resonance section, since the plurality of balls 143aa to 143ae operate as unbalanced, the ball becomes unstable when dewatering.

Accordingly, the present invention proposes a method of stably removing dehydration by preventing the plurality of balls 143aa to 143ae from operating in unbalance in the dehydration mode. This will be described with reference to FIG.

FIG. 7 is a flowchart showing an operation method of the laundry processing apparatus according to an embodiment of the present invention, and FIGS. 8 to 10 are views referred to the description of the operation method of FIG.

First, the controller 210 rotates the washing tub 120 at the first speed and calculates the laundry amount based on the rotation of the first speed V1 (S708).

Fig. 8 illustrates that the washing tub 120 rotates at the first speed V1 during the Pa period. Thus, the control unit 210 can calculate the laundry amount based on the rotation of the washing tub 120 at the first speed (V1) during Pa.

On the other hand, the controller 210 rotates the washing tub 120 at the first speed (S710) and calculates the eccentric amount based on the rotation of the first speed V1 (S715).

FIG. 8 illustrates that the washing tub 120 rotates at the first speed V1 during the Pba period. Thus, the control unit 210 can calculate the eccentric amount based on the rotation of the washing tub 120 at the first speed (V1) during the Pba period.

On the other hand, FIG. 10 (a) illustrates that the plurality of balls 143aa to 143ae are stacked and rotated when the washing tub 120 rotates at the first speed V1.

On the other hand, the first speed V1 may be between approximately 100 and 110 rpm.

Next, the control unit 210 determines whether the amount of eccentricity at the first speed (V1) rotation is equal to or greater than the first reference value (S720) So that the washing tub 120 rotates at a second speed V2 lower than the first speed V1 so that the washing tubs 143ae and 143ae are dispersed.

8 illustrates that the washing tub 120 rotates at the second speed V2 during the Pbb period.

On the other hand, FIG. 10 (b) illustrates that the plurality of balls 143aa to 143ae are dispersed and rotated when the washing tub 120 rotates at the second speed V2.

If the calculated amount of eccentricity is equal to or greater than the allowable value in step 720 (S720), the control unit 210 controls the rotation of the washing tub 120 to stop the washing tub 120 to prevent the tub 120 from falling out .

On the other hand, the second speed V2 may be between about 70 and 90 rpm.

Next, the control unit 210 calculates the amount of eccentricity during the second speed (V2) rotation, determines whether or not the amount of eccentricity during the second speed (V2) rotation is equal to or less than the second reference value (S727) The washing tub 120 may be controlled to rotate at a third speed V3, which is higher than the first speed V1 (S730).

Particularly, the control unit 210 can control so that the plurality of balls 143aa to 143ae are dispersed and rotated at the third speed V3 of the washing tub 120. [

In particular, the control unit 210 prevents the plurality of balls 143aa to 143ae from operating in unbalanced state, thereby enabling stable dehydration.

On the other hand, the second reference value may be a value higher than the first reference value. That is, the control unit 210 controls the washing tub 120 so that the washing tub 120 is rotated at a speed higher than the first speed V1, because the unbalance or the like is reduced by the rotation of the second speed V2, 3 speed (V3).

8 illustrates that the washing tub 120 rotates at the third speed V3 during the Pc period.

On the other hand, FIG. 10 (c) illustrates that the plurality of balls 143aa to 143ae are dispersed and rotated when the washing tub 120 rotates at the third speed V3.

Particularly, the control unit 210 increases the speed of the washing tub 120 so that the balls 143aa to 143ae are dispersed in the transient resonance period so that the plurality of balls 143aa to 143ae are unbalanced So that the dehydration can be stably performed.

Accordingly, in the transient resonance section, it is possible to prevent a short circuit phenomenon in which the washing tub 120 is stopped due to excessive vibration. As a result, the dehydration time in the dehydration mode can be reduced. In addition, since the transient vibration becomes small, noise is hardly generated.

On the other hand, the third speed V3 may be between approximately 350 and 400 rpm.

Next, the control unit 210 controls the washing tub 120 to stop at step S747 when the vibration amount detected by the vibration detecting unit 197 is equal to or greater than the third reference value at the time of the third speed (V3) rotation (S735).

When the vibration amount detected by the vibration detection unit 197 is less than the third reference value, the control unit 210 controls the first and second speeds V1 and V2 at the fourth speed V4, which is higher than the third speed V3, (S740).

Thereby, in the dehydration mode, the plurality of balls 143aa to 143ae are prevented from operating as unbalance, and dehydration can be stably performed.

Fig. 8 illustrates that the washing tub 120 rotates at the fourth speed V4 during the Pd period.

Next, the control unit 210 controls the washing tub 120 to stop when the amount of vibration detected by the vibration detecting unit 197 is equal to or greater than the third reference value at the time of the fourth speed (V4) rotation (S745) (S747).

If the eccentric amount during the first speed V1 rotation is less than the first reference value, the controller 210 rotates the third speed V3 at a third speed V3 that is higher than the first speed V1 in step 720 (S720) .

That is, in step 720 of FIG. 7 (S720), if the amount of eccentricity during the rotation of the first speed V1 is less than the first reference value, control can be directly performed in step 730 (S730). As a result, dehydration can proceed without any dispersion operation of the plurality of balls 143aa to 143ae. Therefore, when the amount of eccentricity is small, dehydration can proceed quickly without rotating the second speed V2.

9 illustrates that the rotational speed of the washing tub rises at the third speed V3 via Vx and the like when the eccentric amount at the first speed V1 rotation is less than the first reference value.

The Pa period in FIG. 9 is a cumulative operation period, and the quantity can be calculated at the first speed (V1) rotation.

Next, the Pb period in Fig. 9 can be calculated as the eccentricity sensing period during the rotation of the first speed (V1). Meanwhile, during the Pb period, the washing tub 120 can rotate at a speed Vx slightly higher than the first speed V1.

Next, the Pc period in Fig. 9 is a third speed (V3) rotation period, and when the amount of eccentricity is below the allowable value, the rotation speed can rise to the fourth speed (V4) as in the Pd period.

On the other hand, when the amount of eccentricity is equal to or greater than the allowable value during the third speed (V3) rotation period or the fourth speed (V4) rotation period or during the speed increasing period from the third speed (V3) Can be stopped.

The laundry processing apparatus according to the embodiment of the present invention is not limited to the configuration and method of the embodiments described above but the embodiments can be applied to all or some of the embodiments May be selectively combined.

The operating method of the laundry processing apparatus of the present invention can be implemented as a code that can be read by a processor on a recording medium readable by a processor included in the laundry processing apparatus. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

Claims (12)

Casing;
A washing tub in the casing;
A ball balancer disposed on at least one side of the washing tub, the ball balancer having a plurality of balls and a guide unit for guiding movement of the plurality of balls;
A door which is attached to the casing and is closed;
A motor for rotating the washing tub;
A driving unit for driving the motor;
In the case of the dehydrating mode, the washing tub is rotated at the first speed, and when the amount of the laundry is equal to or less than the predetermined value and the amount of eccentricity at the first speed rotation is equal to or greater than the first reference value, And a controller for rotating the washing tub at a second speed so as to rotate the washing tub at a third speed higher than the first speed when the amount of eccentricity during the second speed rotation is equal to or less than a second reference value, Processing equipment. The method according to claim 1,
Wherein,
And controls the washing tub to rotate at the third speed while the plurality of balls are dispersed. The method according to claim 1,
Wherein,
Wherein the speed of the washing tub is increased so that the plurality of balls are dispersed and passed through the transient resonance section. The method according to claim 1,
And a vibration sensing unit for sensing vibration of the washing tub,
Wherein,
Wherein the control unit controls the washing machine to stop when the amount of vibration of the washing tub detected by the vibration detecting unit is equal to or greater than a third reference value during the third speed rotation,
And controls the washing machine to rotate at a fourth speed higher than the third speed when the vibration amount of the washing tub detected by the vibration detecting unit is less than a third reference value. The method according to claim 1,
Wherein,
Calculates an eccentric amount at the first speed rotation,
And calculates the quantity of laundry before the eccentricity amount calculation. 6. The method of claim 5,
Wherein,
Wherein the washing machine rotates the washing tub at the first speed before the eccentricity amount calculation and calculates the laundry amount at the first speed rotation. The method according to claim 1,
Wherein,
Wherein the washing tub is rotated at the first speed so that the washing tub is attached to the washing tub. The method according to claim 1,
Wherein,
And controls to rotate the washing tub at a first speed when the dehydration mode is selected and to rotate at a third speed higher than the first speed when the amount of eccentricity during the first speed rotation is less than the first reference value And a washing machine. Casing;
A washing tub in the casing;
A ball balancer disposed on at least one side of the washing tub, the ball balancer having a plurality of balls and a guide unit for guiding movement of the plurality of balls;
A door which is attached to the casing and is closed;
A motor for rotating the washing tub;
A driving unit for driving the motor;
In the case of the dehydrating mode, the washing tub is rotated at the first speed, and when the amount of the laundry is equal to or less than the predetermined value and the amount of eccentricity at the first speed rotation is equal to or greater than the first reference value, And a controller for rotating the washing tub at a second speed so as to rotate the washing tub at a third speed higher than the first speed when the amount of eccentricity during the first speed rotation is less than the first reference value Laundry processing equipment. 10. The method of claim 9,
And a vibration sensing unit for sensing vibration of the washing tub,
Wherein,
And controls to rotate at the third speed higher than the first speed when the amount of eccentricity during the second speed rotation is equal to or less than a second reference value,
And controls the washing machine to rotate at a fourth speed higher than the third speed when the amount of vibration of the washing tub detected by the vibration detecting unit is less than a third reference value during the third speed rotation. 11. The method of claim 10,
Wherein,
And controls to rotate at a third speed of the washing tub while the plurality of balls are dispersed. 11. The method of claim 10,
Wherein,
Wherein the speed of the washing tub is increased so that the plurality of balls are dispersed and passed through the transient resonance section.

Images