KR20120004273A - Washing machine and method for controlling washing machine - Google Patents

Abstract

PURPOSE: A laundry processing device and controlling method of a laundry processing device are provided to reduce the sensing section of laundry quantity and to perform the motor driving of dynamic breaking after sensing the quantity of laundry. CONSTITUTION: A control unit distributes laundry within a washing tub(S610). The control unit rotates the motor at a predetermined speed by the approval of the current(S620). The control unit turns off current which is applied to the motor(S630). The control unit senses laundry quantity based on the deceleration speed of the motor(S640). The control unit brakes the motor(S650).

Description

Washing machine and method for controlling washing machine {Washing machine and method for controlling washing machine}

The present invention relates to a laundry treatment apparatus and a method for controlling the laundry treatment apparatus, and more particularly, to a laundry treatment apparatus and a laundry treatment apparatus capable of accurately detecting a quantity of laundry.

In general, the laundry treatment machine washes by using the friction force of the washing tank and the laundry that is rotated by receiving the driving force of the motor while the detergent, the washing water, and the laundry are put in the drum, so that the laundry is hardly damaged and the laundry is not tangled with each other. It does not wash.

On the other hand, various methods for detecting the amount of laundry in the laundry treatment machine have been discussed.

An object of the present invention is to provide a laundry treatment apparatus and a method for controlling a laundry treatment apparatus capable of accurately detecting a quantity of laundry.

In addition, another object of the present invention is to provide a laundry treatment apparatus and a method for controlling a laundry treatment apparatus capable of shortening the quantity detection time.

The control method of the laundry treatment machine according to an embodiment of the present invention for achieving the above object, as a control method of the laundry treatment machine including a laundry tank is inserted and rotated, and a motor for rotating the laundry tank, applying a current Rotating the motor at a constant speed, turning off a current applied to the motor, and detecting a quantity of quantity based on the deceleration speed or deceleration time of the motor in at least a part of the off period. do.

In addition, the laundry treatment apparatus according to an embodiment of the present invention for achieving the above object, the washing tank is inserted and rotated, the motor for rotating the washing tank, and controls to rotate the motor at a constant speed, the constant of the motor A control unit is configured to control the current applied to the motor to be turned off during the speed rotation, and to detect the amount of quantity based on the deceleration speed or the deceleration time of the motor in at least a part of the off period.

According to an embodiment of the present invention, in order to detect a quantity, by applying an alternating current to the motor, rotating the motor at a constant speed, turning off the current applied to the motor, and decelerating the motor in at least some of the off periods. Use speed or deceleration time. Thereby, the quantity detection can be performed correctly. Accordingly, it is possible to accurately match the washing water supply or the washing water level according to the accurate detection of the quantity.

After the detection of the dose, the motor braking of the power generation braking or the reverse phase braking is performed to partially shorten the quantity detection interval.

As a result, it is possible to efficiently drive the laundry treatment machine.

1 is a perspective view showing a laundry treatment machine according to an embodiment of the present invention.
2 is a side cross-sectional view of the laundry treatment machine of FIG.
3 is an internal block diagram of the laundry treatment machine of FIG.
4 is an internal circuit diagram of the driving unit of FIG. 3.
FIG. 5 is an internal block diagram of the inverter controller of FIG. 4.
6 is a flowchart illustrating a control method of a laundry treatment machine according to an embodiment of the present invention.
7 to 8 are views referred to for describing the control method of FIG. 6.
9 is a flowchart illustrating a method of operating the laundry treatment apparatus of FIG. 1.
10 is a view showing an example of the motor rotational speed during the washing stroke of FIG.
FIG. 11 is a diagram illustrating an example of a motor rotational speed during the dehydration stroke of FIG. 9.
12 is a perspective view showing a laundry treatment machine according to another embodiment of the present invention.

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

The suffixes "module" and "unit" for components used in the following description are merely given in consideration of ease of preparation of the present specification, and do not impart any particular meaning or role by themselves. Therefore, the "module" and "unit" may be used interchangeably.

1 is a perspective view showing a laundry treatment machine according to an embodiment of the present invention, Figure 2 is a side cross-sectional view of the laundry treatment machine of FIG.

1 to 2, the laundry treatment apparatus 100 according to an embodiment of the present invention includes a washing machine or a dryer in which a cloth is inserted to perform washing, rinsing, dehydration, and the like, and a dryer is installed to perform drying. In the following description, a washing machine will be described below.

The washing machine 100 includes a casing 110 for forming an exterior, operation keys for receiving various control commands from a user, a display for displaying information about an operating state of the washing machine 100, and a user interface. The control panel 115 and the casing 110 is rotatably provided, and includes a door 113 for opening and closing the entrance hall through which laundry is entered.

The casing 110 is provided with a main body 111 forming a space in which various components of the washing machine 100 can be accommodated, and an upper side of the main body 111 so that laundry can be introduced into the inner tank 122. It may include a top cover 112 to form a discharge hole.

The casing 110 is described as including the main body 111 and the top cover 112, but the casing 110 is sufficient to form the appearance of the washing machine 100, but is not limited thereto.

On the other hand, the support rod 135 is described as being coupled to the top cover 112, which is one of the components forming the casing 110, but is not limited thereto, and is coupled to any part of the fixed portion of the casing 110. Specifies that it is possible.

The control panel 115 may include operation keys 117 for operating the driving state of the laundry processing apparatus 100 and a display disposed on one side of the operation keys 117 to display the driving state of the laundry processing apparatus 100 ( 118).

The door 113 may open and close a discharge hole (not shown) formed in the top cover 112, and may include a transparent member such as tempered glass so that the inside of the main body 111 can be seen.

The washing machine 100 may include a washing tub 120. The washing tub 120 may include an outer tub 124 in which washing water is contained, and an inner tub 122 rotatably provided in the outer tub 124 to accommodate laundry. A balancer 134 may be provided at an upper portion of the washing tub 120 to compensate for an eccentricity generated when the washing tub 120 is rotated.

On the other hand, the washing machine 100 may include a pulsator 133 rotatably provided in the lower portion of the washing tank 120.

The drive device 138 provides a driving force for rotating the inner tank 122 and / or the pulsator 133. A clutch (not shown) for selectively transmitting the driving force of the driving device 138 to rotate only the inner tank 122, only the pulsator 133, or the inner tank 122 and the pulsator 133 rotate at the same time. It may be provided.

On the other hand, the driving device 138 is operated by the driving unit 220, that is, the driving circuit of FIG. This will be described later with reference to FIG. 3 and below.

On the other hand, the top cover 112 is provided with a detergent box 114 for accommodating various additives, such as laundry detergent, fabric softener and / or bleach, is retractable, wash water supplied through the water supply passage 123 detergent box After passing through 114, it is fed into the inner tub 122.

A plurality of holes (not shown) are formed in the inner tank 122, and the washing water supplied to the inner tank 122 flows to the outer tank 124 through the plurality of holes. A water supply valve 125 that regulates the water supply passage 123 may be provided.

The wash water in the outer tub 124 is drained through the drain passage 143, and a drain valve 145 for controlling the drain passage 143 and a drain pump 141 for pumping the wash water may be provided.

The support rod 135 is for suspending the outer tub 124 in the casing 110, one end of which is connected to the casing 110, and the other end of the supporting rod 135 is connected to the outer tub 124 by the suspension 150. do.

The suspension 150 buffers the vibration of the outer tub 124 during the operation of the washing machine 100. For example, the outer tub 124 may vibrate by vibration generated as the inner tub 122 rotates, and while the inner tub 122 rotates, the eccentricity of the laundry accommodated in the inner tub 122, Vibration can be buffered by various factors such as rotation speed or resonance characteristics.

3 is an internal block diagram of the laundry treatment machine of FIG.

Referring to the drawings, in the laundry treatment apparatus 100, the driving unit 220 is controlled by the control operation of the control unit 210, and the driving unit 220 drives the motor 230. Accordingly, the washing tank 120 is rotated by the motor 230.

The control unit 210 receives an operation signal from the operation key 1017 and operates. Accordingly, washing, rinsing, and dehydration strokes can be performed.

In addition, the controller 210 may control the display 118 to display a washing course, a washing time, a dehydration time, a rinsing time, or a current operation state.

On the other hand, the control unit 210 controls the drive unit 220 to control the motor 230 to operate. For example, based on the current detector 225 for detecting the output current flowing through the motor 230 and the position detector 220 for detecting the position of the motor 230, the driver 220 rotates the motor 230. ) Can be controlled. In the drawing, although the detected current and the detected position signal are input to the driver 220, the present invention is not limited thereto and may be inputted to the controller 210 or inputted together to the controller 210 and the driver 220. It is also possible.

The driver 220 drives the motor 230 and may include an inverter (not shown) and an inverter controller (not shown). In addition, the driving unit 220 may be a concept that further includes a converter, which supplies a DC power input to an inverter (not shown).

For example, when the inverter controller (not shown) outputs a pulse width modulation (PWM) switching control signal (Sic in FIG. 4) to the inverter (not shown), the inverter (not shown) performs a high speed switching operation. AC power of a predetermined frequency may be supplied to the motor 230.

The driving unit 220 will be described later with reference to FIG. 4.

On the other hand, the control unit 210, based on the current (i _o ) detected by the current detection unit 220 or the position signal (H) detected by the position detection unit 235, it can detect the dose. For example, while the washing tub 120 rotates, the amount of quantity can be sensed based on the current value i _o of the motor 230.

On the other hand, the controller 210 may detect an unbalance (UB) of the eccentricity of the washing tub 120, that is, the washing tub 120. The eccentricity detection may be performed based on the ripple component of the current i _o detected by the current detector 220 or the rotation speed change amount of the washing tub 120.

4 is an internal circuit diagram of the driving unit of FIG. 3.

Referring to the drawings, the driving unit 220 according to an embodiment of the present invention, the converter 410, the inverter 420, the inverter control unit 430, the dc terminal voltage detector (B), smoothing capacitor (C), And an output current detector E. In addition, the driver 220 may further include an input current detector A, a reactor L, and the like.

The reactor L is disposed between the commercial AC power supplies 405 and v _s and the converter 410 to perform power factor correction or boost operation. In addition, the reactor L may perform a function of limiting harmonic currents due to the fast switching of the converter 410.

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

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

Meanwhile, the converter 410 may be formed of a diode or the like without a switching element, and may perform rectification without a separate switching operation.

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

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

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

The smoothing capacitor C smoothes and stores the input power. In the figure, one element is illustrated as the smoothing capacitor C, but a plurality of elements may be provided to ensure device stability.

On the other hand, in the drawing, but is illustrated as being connected to the output terminal of the converter 410, not limited to this, a direct current power may be input directly, for example, a direct current power from a solar cell is supplied to the smoothing capacitor (C). It may be input directly or DC / DC converted. Hereinafter, the parts illustrated in the drawings will be mainly described.

On the other hand, since the DC power is stored at both ends of the smoothing capacitor C, this may be referred to as a dc terminal or a dc link terminal.

The dc end voltage detector B may detect a dc end voltage Vdc that is both ends of the smoothing capacitor C. To this end, the dc terminal voltage detector B may include a resistor, an amplifier, and the like. The detected dc terminal voltage Vdc may be input to the inverter controller 430 as a discrete signal in the form of a pulse.

The inverter 420 includes a plurality of inverter switching elements, converts the smoothed DC power supply Vdc into three-phase AC power supplies va, vb and vc of a predetermined frequency by turning on / off an operation of the switching device, It may output to the synchronous motor 230.

Inverter 420 is a pair of upper arm switching elements Sa, Sb, Sc and lower arm switching elements S'a, S'b, S'c, which are connected in series with each other, and a total of three pairs of upper and lower arms The switching elements are connected in parallel with each other (Sa & S'a, Sb & S'b, Sc & S'c). Diodes are connected in anti-parallel to each of the switching elements Sa, S'a, Sb, S'b, Sc, and 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. As a result, the three-phase AC power supply having the predetermined frequency is output to the three-phase synchronous motor 230.

The inverter controller 430 may control the switching operation of the inverter 420. To this end, the inverter controller 430 may receive an output current i _o detected by the output current detector E. FIG.

The inverter controller 430 outputs an inverter switching control signal Sic to the inverter 420 to control the switching operation of the inverter 420. The inverter switching control signal Sic is a switching control signal of the pulse width modulation system PWM, and is generated and output based on the output current value i _o detected by the output current detector E. FIG. A detailed operation of the output of the inverter switching control signal Sic in the inverter controller 430 will be described later with reference to FIG. 5.

The output current detector E detects the output current i _o flowing between the inverter 420 and the three-phase motor 230. That is, the current flowing through the motor 230 is detected. The output current detector E may detect all of the output currents ia, ib, and ic of each phase, or may detect the output currents of two phases by using three-phase equilibrium.

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

When a shunt resistor is used, three shunt resistors are located between the inverter 420 and the synchronous motor 230 or the three lower arm switching elements S'a, S'b, S'c of the inverter 420. It is possible to connect one end to each). 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 corresponding shunt resistor may be disposed between the above-described capacitor C and the inverter 420.

The detected output current i _o , as a discrete signal in the form of a pulse, may be applied to the inverter controller 430, and the inverter switching control signal Sic based on the detected output current i _o . Is generated. Hereinafter, it will be described that the detected output current (i _o ) is the three-phase output current (ia, ib, ic).

On the other hand, the three-phase motor 230 is provided with a stator and a rotor, each phase AC power of a predetermined frequency is applied to the coil of the stator of each phase (a, b, c phase), the rotor rotates Will be

Such a motor 230 may be, for example, a Surface-Mounted Permanent-Magnet Synchronous Motor (SMPMSM), an Interior Permanent Magnet Synchronous Motor (IPMSM), and a synchronous clock. Synchronous Reluctance Motor (Synrm) and the like. Of these, SMPMSM and IPMSM are permanent magnet synchronous motors (PMSMs) with permanent magnets, and synrms have no permanent magnets.

On the other hand, when the converter 410 includes a switch element, the inverter controller 430 may control the switching operation of the switching element in the converter 410. To this end, the inverter controller 430 may receive an input current i _s detected by the input current detector A. FIG. In addition, the inverter controller 430 may output the converter switching control signal Scc to the converter 410 in order to control the switching operation of the converter 410. The converter switching control signal Scc is a pulse width modulation PWM switching control signal, and may be generated and output based on the input current i _s detected from the input current detector A. FIG.

On the other hand, the position detection unit 235 may detect the rotor position of the motor 230. To this end, the position sensor 235 may include a hall sensor. The detected rotor position H is input to the inverter controller 430 to be used based on the speed calculation.

FIG. 5 is an internal block diagram of the inverter controller of FIG. 4.

Referring to FIG. 5, the inverter controller 430 may include an axis converter 510, a speed calculator 520, a current command generator 530, a voltage command generator 540, an axis converter 550, and The switching control signal output unit 560 may be included.

The axis conversion unit 510 receives the three-phase output currents (ia, ib, ic) detected by the output current detection unit E, and converts the two-phase currents i α and i β of the stationary coordinate system.

On the other hand, the axis conversion unit 510 can convert the two-phase current (iα, iβ) of the stationary coordinate system into the two-phase current (id, iq) of the rotary coordinate system.

)를 연산할 수 있다. 즉, 위치 신호에 기반하여, 시간에 대해, 나누면, 속도를 연산할 수 있게 된다.The speed calculator 520 may calculate the speed (based on the position signal H of the rotor input from the position detector 235).

) Can be calculated. That is, based on the position signal, when divided over time, the velocity can be calculated.

)와 연산된 속도(

)를 출력할 수 있다.On the other hand, the speed calculator 520 calculates the position (calculated based on the input position signal H of the rotor)

) And computed speed (

) Can be printed.

)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 unit 530 has a calculation speed (

) And the current command value i ^* _q based on the speed command value ω ^* _r . For example, the current command generation unit 530 has a calculation speed (

) Based on the difference between the speed command value (ω ^* _r ) and the PI controller 535 to perform PI control, and generate a current command value (i ^* _q ). In the drawing, although the q-axis current command value i ^* _q is illustrated as a current command value, it is also possible to generate | generate a d-axis current command value i ^* _d unlike a 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 level so that the current command value i ^* _q does not exceed the allowable range.

Next, the voltage command generation unit 540 includes the d-axis and q-axis currents i _d and i _q which are axis-converted in the two-phase rotation coordinate system by the axis conversion unit, and the current command value (such as the current command generation unit 530). Based on i ^* _d , i ^* _q ), the d-axis and q-axis voltage command values v ^* _d and v ^* _q are generated. 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 , and q The axial voltage setpoint v ^* _q can be generated. In addition, the voltage command generation unit 540 performs PI control in the PI controller 548 based on the difference between the d-axis current i _d and the d-axis current command value i ^* _d , and the d-axis voltage. The setpoint (v ^* _d ) can be generated. On the other hand, the voltage command generation unit 540 may further include a limiter (not shown) for restricting the level so that the d-axis and q-axis voltage command values v ^* _d and v ^* _q do not exceed the allowable range. .

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

)와, d축, q축 전압 지령치(v^* _d,v^* _q)를 입력받아, 축변환을 수행한다.The axis conversion unit 550 may calculate a position calculated by the speed calculating unit 520 (

), And the d-axis and q-axis voltage command values (v ^* _d , v ^* _q ) are input, and axis conversion is performed.

)가 사용될 수 있다.First, the axis transformation unit 550 converts the two-phase rotation coordinate system from the two-phase rotation coordinate system. At this time, the position calculated by the speed calculator 520 (

) Can be used.

The axis transform unit 550 converts the two-phase stationary coordinate system into a three-phase stationary coordinate system. Through this conversion, the axis conversion unit 1050 outputs the three-phase output voltage command 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 command values (v ^* a, v ^* b, v ^* c). To print.

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

In the meantime, in the embodiment of the present invention, the inverter controller 430 turns off the current supplied to the motor 230 at the time of detecting the quantity of water. That is, all of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c in the inverter 420 are turned off. During this off period, the quantity of the gun can be accurately detected by the deceleration speed or the deceleration time calculated based on the position signal H detected by the position detection unit 235.

As described above, the inverter controller 430 in the driving unit 220 is described as detecting the quantity, but this is only one example, it is also possible that the control unit 210 for controlling all operations of the driving unit 220 to detect the quantity. Do. That is, the position signal H detected by the position detecting unit 235 is transmitted to the control unit 210 through the driving unit 220, so that the control unit 210 can detect the amount of dose.

3 and 4, the controller 210 and the inverter controller 430 may be configured as a single unit.

6 is a flowchart illustrating a control method of a laundry treatment machine according to an embodiment of the present invention, and FIGS. 7 to 8 are views referred to for describing the control method of FIG. 6.

Referring to the drawings, first, the cloth in the washing tank is dispersed (S610).

Foam dispersion | distribution can disperse | distribute a cloth by forward rotation or reverse rotation, or repeated stirring rotation of a forward and a reverse direction at the rotation speed v0 lower than the 1st rotation speed v1 at the time of a quantity detection.

In FIG. 7, two predetermined rotational speeds v0 are rotated in a predetermined section To, but this indicates only the magnitude of the speed and is irrelevant to the direction. In the drawing, two constant rotational speeds v0 are illustrated, but one time is possible, and the number of times more than that is also possible.

The controller 210 or the inverter controller 430 may control the motor 230 to rotate at a constant rotation speed v0. That is, the inverter switching control signal Sic may be controlled to be output to the inverter 420.

On the other hand, the above-described dispersion | distribution step (S610), it is also possible to be selectively performed.

Next, by applying a current, the motor is rotated at a constant speed (S620).

The controller 210 or the inverter controller 430 may apply an alternating current to control the motor 230 to rotate at a constant first rotation speed v1. That is, the inverter switching control signal Sic may be controlled to be output to the inverter 420. At this time, the alternating current applied to the motor 230 is preferably a sine wave current. This makes it possible to accurately drive the motor 230 at the time of detection of the quantity.

In FIG. 7, the motor 230 rotates at the first rotational speed v1 in the first section T1. At this time, the first section T1 is preferably maintained for a predetermined period or more so that the motor 230 maintains a constant rotation speed. In addition, it is desirable to maintain the appropriate section so that the section for the detection of the dose is not too long.

On the other hand, in the drawing, the section rotating at the first rotational speed is illustrated as one example, but the present invention is not limited thereto. For accurate detection of a dose, it may be performed for a plurality of times.

Next, the current applied to the motor is turned off (S630). Then, based on the deceleration speed or the deceleration time of the motor in at least a part of the off period, the amount of quantity is sensed (S640).

The controller 210 or the inverter controller 430 turns off the current applied to the motor 230. That is, as shown in FIG. 8A, all three pairs of phase arm switching elements Sa, Sb, and Sc and lower arm switching elements S'a, S'b, and S'c in the inverter 420 are turned off. To control. As a result, the motor 230 is decelerated.

In the embodiment of the present invention, for the detection of the dose, the alternating current supplied to the motor 230 is turned off, and during at least a part of the off period, using the deceleration speed or deceleration time of the motor 230, the amount of detection of the dose do.

When the AC power supplied to the motor 230 is turned off, as shown in the second section T2 of FIG. 7, the motor 230 driving the washing tub 120 into which the cloth is inserted is decelerated. In particular, since the motor 230 decelerates nonlinearly in a certain section from the off time, the speed of the motor 230 linearly decelerates during the certain section T3. Then, as the cloth in the washing tank 120 is released again, the motor 230 decelerates nonlinearly.

In the embodiment of the present invention, during the linear deceleration section T3, the amount of detection is detected using the deceleration speed or deceleration time of the motor 230. As described above, the deceleration speed or deceleration time of the motor 230 may be detected based on the deceleration speed or deceleration time calculated based on the position signal H of the position detection unit 235.

For example, the slower the deceleration speed or deceleration time is, the smaller the amount of the catch is.

For example, when the first rotational speed v1 of the motor 230 is between 100 rpm and 150 rpm, the deceleration speed of the motor in the quantity detection section may be at least a part between 30 rpm and 90 rpm. The deceleration speed section between 30 rpm (vx) and 90 rpm (vy) may correspond to the linear section T3 except for the non-linear section described above. As a result, accurate dose detection can be performed.

On the other hand, in the linear section T3, in addition to the deceleration speed or deceleration time during the partial deceleration section, it is also possible to perform the dose detection based on the deceleration speed or deceleration time during the plurality of deceleration sections. And, it is also possible to calculate the final dose detection value by using the average or the weight for the plurality of dose detection values.

On the other hand, such a quantity detection, it is possible to be carried out during the washing or dehydration stroke, according to the detected amount of detection, in the detection of the eccentric amount performed after the detection of the amount, it is possible to vary the eccentric amount table that stores the tolerance value . Moreover, according to the washing | cleaning stroke or the dehydration stroke, it is also possible to provide and use different eccentricity table. The eccentric amount table may be provided in the controller 210 or the inverter controller 430.

Next, the motor is braked (S650). The controller 210 or the inverter controller 430 may control the motor 230 to be braked. As the braking method, power generation braking, reverse phase braking and the like can be used.

For example, to perform power generation braking, the control unit 210 or the inverter control unit 430 may include three pairs of phase arm switching elements Sa, Sb, and Sc in the inverter 420, as shown in FIG. Are controlled to turn off all of the arm arm switching elements S'a, S'b, and S'c. As a result, a closed loop is formed between the motor 230 and the lower arm switching elements S'a, S'b, and S'c, and the residual current is consumed. Thus, the motor 230 is stopped.

As another example, to perform power generation braking, the control unit 210 or the inverter control unit 430, as shown in Figure 8 (b), the three pairs of phase arm switching elements (Sa, Sb, Sc) in the inverter 420 All of them are turned on and control to turn off all of the arm arm switching elements S'a, S'b, and S'c. As a result, a closed loop is formed between the motor 230 and the phase arm switching elements Sa, Sb, and Sc, and the residual current is consumed. Thus, the motor 230 is stopped.

As another example, to perform reversed braking, the controller 210 or the inverter controller 430 applies a switching signal Sic to the inverter 420 such that the motor 230 rotates in a direction opposite to that of the motor 230. That is, if the phase of the alternating current applied to the three phases of the motor 230 during the first period T1 was in the order of a, b, and c phases, the reverse of the alternating current applied to the three phases of the motor 230 for reverse phase braking. The phase can be controlled to be in the order of a and cb. This causes the motor 230 to stop by the opposite direction of rotational component.

In FIG. 7, the braking section T4 of the motor 230 is illustrated, and it can be seen that the motor 230 is braked within a section shorter than the natural deceleration of the motor 230. As a result, it is possible to shorten the amount of detection intervals overall.

9 is a flowchart illustrating a method of operating the laundry treatment apparatus of FIG. 1.

Referring to the drawing, in the method of operating the laundry treatment machine, a cloth is inserted, and the washing stroke (S910), the rinsing stroke (S920), and the dehydration stroke (S930) are performed by the user's setting.

During the washing stroke (S910), a quantity detection section for detecting the quantity of cloth in the washing tank 120, an eccentric amount detection section for detecting the unbalance of the cloth, and the present washing section may be performed, various examples are possible.

During the rinsing cycle S920, a water supply section, a predetermined speed rotation section, a drain section, and the like may be performed, and various examples are possible.

During the dehydration stroke (S930), a quantity detection section for detecting the quantity of guns in the washing tank 120, an eccentric amount detection section for detecting the unbalance of the guns, a simple dehydration section, and the present dehydration section may be performed, and various examples are possible. Do.

According to one embodiment of the present invention, in order to detect the amount of water in the washing stroke (S910), by applying an alternating current to the motor 230, while rotating the motor 230 at a constant speed (v1), the motor 230 Turns off the current applied to. That is, all of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c in the inverter 420 are turned off. In addition, during at least some of the off periods, the dose detection may be accurately performed using the deceleration speed or the deceleration time of the motor 230 based on the position signal H detected by the position detection unit 235. In addition, after the detection of the amount of pores, the motor braking is performed to partially shorten the amount of detection amount.

10 is a view showing an example of the motor rotational speed during the washing stroke of FIG.

Referring to the drawings, the washing stroke section of FIG. 10 may include a quantity detecting section Ta, an eccentric amount detecting section Tb, a first washing section Tc, and a second washing section Td.

The quantity detection section Ta is a section for detecting the quantity in the washing tank 120. As shown in FIG. 7, the alternating current is applied to the motor 230 to rotate the motor 230 at a constant speed v1. Then, the current applied to the motor 230 is turned off. That is, all of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c in the inverter 420 are turned off. In addition, during at least some of the off periods, the dose detection may be accurately performed using the deceleration speed or the deceleration time of the motor 230 based on the position signal H detected by the position detection unit 235. In addition, after the detection of the amount of pores, the motor braking is performed to partially shorten the amount of detection amount. On the other hand, according to the detected amount of laundry, the amount of washing water supplied at the time of washing, the level of the washing water may be determined.

Meanwhile, as shown in FIG. 7, a foam dispersion section (not shown) for dispersing the fabric in the washing tank 120 may be further performed before the quantity detection section Ta. The cloth dispersion section (not shown) can disperse a cloth by a forward rotation or a reverse rotation or a repeated stirring rotation in the forward and reverse directions at a speed lower than the first rotation speed v1.

The eccentricity detection section Tb is a section for detecting the amount of eccentricity UB in the washing tub 120, and may rotate the washing tub 120 at a second rotation speed v2 to detect the amount of eccentricity. Specifically, the amount of eccentricity may be sensed based on the output current i _o value of the motor 230 or the ripple of the output current i _o .

In the first washing section Tc and the second washing section Td, when the amount of eccentricity detected in the eccentricity detecting section Tb is less than or equal to the allowable value, the washing tub 120 is rotated by the third rotation speed v3 and the fourth rotation, respectively. Can be rotated at speed v4. In a state where water is performed before the first washing section Tc and the second washing section Td, a laundry detergent or the like is introduced into the washing tank 120 to perform washing. Drainage can be performed after completion.

FIG. 11 is a diagram illustrating an example of a motor rotational speed during the dehydration stroke of FIG. 9.

Referring to the drawings, the dehydration stroke section of FIG. 11 includes a quantity detection section Tl, a first eccentricity detection section Tm, a first dehydration section Tn, a second eccentricity detection section To, and a second dehydration section. (Tp), the third eccentricity detection section Tq, and the third dehydration section Tr.

The quantity detection section Tl is a section for detecting the quantity in the washing tub 120. As shown in FIG. 7, the alternating current is applied to the motor 230 to rotate the motor 230 at a constant speed v1. Then, the current applied to the motor 230 is turned off. That is, all of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c in the inverter 420 are turned off. In addition, during at least some of the off periods, the dose detection may be accurately performed using the deceleration speed or the deceleration time of the motor 230 based on the position signal H detected by the position detection unit 235. In addition, after the detection of the amount of pores, the motor braking is performed to partially shorten the amount of detection amount. On the other hand, according to the detected amount of water, the amount of washing water supplied at the time of dehydration, the level of the washing water may be determined.

Meanwhile, as shown in FIG. 7, a foam dispersion section (not shown) for dispersing the fabric in the washing tank 120 may be further performed before the quantity detection section Tl. The cloth dispersion section (not shown) can disperse a cloth by a forward rotation or a reverse rotation or a repeated stirring rotation in the forward and reverse directions at a speed lower than the first rotation speed v1.

The first to third eccentricity detection intervals (Tm, To, Tq) is a section for detecting the amount of eccentricity (UB) in the washing tank 120, by rotating the washing tank 120 at a second rotational speed (v2), Can be detected. Specifically, the amount of eccentricity may be sensed based on the output current i _o value of the motor 230 or the ripple of the output current i _o .

The first to third dehydration sections (Tn, Tp, Tr), respectively, when the eccentricity detected in the first to third eccentricity detection interval (Tm, To, Tq) is less than the allowable value, respectively, the washing tank 120 to the third to It may rotate at the fifth rotation speed (v3, v4, v5). In a state in which water supply is performed before the first dehydration section Tn, dehydration may be performed, and drainage may be performed in the middle.

Meanwhile, unlike the drawing, not all the first to third eccentricity detection intervals Tm, To, and Tq may be performed, but only the first eccentricity detection interval Tm may be performed.

12 is a perspective view showing a laundry treatment machine according to another embodiment of the present invention.

Referring to the drawings, the laundry treatment apparatus 1100 of FIG. 12 is a front load method as compared to the top load method of FIG. 11.

The laundry treatment machine 1100 includes a cabinet 1110 forming an exterior of the laundry treatment machine 1100, a tub 1120 disposed inside the cabinet 1110 and supported by the cabinet 1110, and a tub 1120. A drum 1122 disposed inside the washing machine for washing the cloth, a motor 1130 for driving the drum 1122, and a wash water supply disposed outside the cabinet body 1111 to supply washing water into the cabinet 1110. An apparatus (not shown) and a drain device (not shown) formed below the tub 1120 to discharge the washing water to the outside.

A plurality of through holes 1122A are formed in the drum 1122 to allow the washing water to pass therethrough, and when the drum 1122 is rotated, the laundry is lifted to a predetermined height and then lifted on the inner side of the drum 1122 so as to fall by gravity. 1124 may be deployed.

The cabinet 1110 includes a cabinet main body 1111, a cabinet cover 1112 disposed at the front of the cabinet main body 1111 and coupled to each other, and a control disposed at the upper side of the cabinet cover 1112 and coupled with the cabinet main body 1111. The panel 1115 and a top plate 1116 disposed above the control panel 1115 and coupled to the cabinet body 1111 are included.

The cabinet cover 1112 includes a fabric access hole 1114 formed to allow the fabric to enter and exit, and a door 1113 disposed to be rotatable from side to side to allow the fabric access hole 1114 to be opened and closed.

The control panel 1115 is provided with operation keys 1117 for operating the operation state of the laundry processing apparatus 1100 and a display 1118 disposed on one side of the operation keys 1117 and displaying an operation state of the laundry processing apparatus 1100. ).

The operation keys 1117 and the display device 1118 in the control panel 1115 are electrically connected to a controller (not shown), and the controller (not shown) electrically controls each component of the laundry processing apparatus 1100. do.

Similar to the laundry treatment apparatus 100 of FIG. 1 described above, the laundry treatment apparatus 1100 of FIG. 12 applies an alternating current to the motor 1130 to detect a quantity of the laundry. While rotating to v1), the current applied to the motor 1130 is turned off. That is, all of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c in the inverter are turned off. In addition, during at least some of the off periods, the dose detection may be accurately performed using the deceleration speed or deceleration time of the motor 1130 based on the position signal H detected by the position detection unit. In addition, after the detection of the amount of pores, the motor braking is performed to partially shorten the amount of detection amount.

The laundry treatment apparatus according to the embodiment of the present invention is not limited to the configuration and method of the embodiments described as described above, but the embodiments are all or part of each embodiment so that various modifications can be made. May be optionally combined.

On the other hand, the control method of the laundry treatment machine of the present invention can be implemented as code that can be read by the processor on a processor-readable recording medium provided in the laundry treatment machine. The processor-readable recording medium includes all kinds of recording devices that store data that can be read by the processor.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (17)

In the control method of the laundry treatment machine comprising a laundry tank is inserted and rotated, and a motor for rotating the laundry tank,
Applying a current to rotate the motor at a constant speed;
Turning off the current applied to the motor;
And detecting a quantity of quantity based on a deceleration speed or a deceleration time of the motor in at least a part of the off period. The method of claim 1,
The quantity detection step,
The control method of the laundry treatment machine, characterized in that performed in the period during which the rotational speed of the motor is linearly reduced during the off period. The method of claim 1,
And braking the motor after the detection of the quantity of water. The method of claim 1,
Before the constant speed rotation step,
Dispersing the cloth in the washing tank; control method of a laundry treatment machine further comprising. The method of claim 4, wherein
The dispersing step is,
The control method of the laundry treatment machine, characterized in that the motor rotates forward or reverse or forward and reverse rotation at a lower speed than the predetermined speed. The method of claim 1,
The quantity detection step,
And a quantity of water is detected on the basis of the deceleration speed or the deceleration period of the motor in a plurality of periods during the off period. The method of claim 1,
The quantity detection,
The deceleration speed of the motor is a control method of a laundry treatment machine, characterized in that carried out in at least a portion of the deceleration speed interval of 30 rpm to 90 rpm. A washing tank in which the fabric is inserted and rotated;
A motor for rotating the washing tub; And
Control to rotate the motor at a constant speed, control to turn off the current applied to the motor during a constant speed rotation of the motor, and based on the deceleration speed or deceleration time of the motor in at least some of the off period. And a control unit for sensing a quantity of laundry. The method of claim 8,
An inverter that converts a predetermined DC power source into an AC power source having a predetermined frequency and outputs the AC power source to the motor;
An output current detector for detecting an output current flowing through the motor; And
The laundry treatment apparatus further comprises a; position detection unit for detecting the position of the rotor of the motor. The method of claim 8,
The control unit,
The laundry treatment apparatus characterized in that the control is performed so that the rotational speed of the motor is linearly reduced during the off period. 10. The method of claim 9,
The inverter,
Three pairs of switching elements comprising a pair of upper arm and lower arm switching elements;
And the control unit turns off the three pairs of switching elements in the inverter when the current is turned off. 10. The method of claim 9,
The control unit,
And after the detection of the quantity of water, turn on only the lower arm switching elements or the upper arm switching elements in the inverter to brake the motor. The method of claim 8,
The control unit,
Before the constant speed rotation step, the laundry processing apparatus, characterized in that for driving the motor to disperse the cloth in the washing tank. The method of claim 13,
The control unit,
When the cloth is dispersed, the laundry treatment apparatus, characterized in that for controlling the motor to rotate forward or reverse rotation or forward and reverse rotation at a speed lower than the predetermined speed. The method of claim 8,
The control unit,
In response to the detection of the amount of laundry, characterized in that it comprises a different eccentric amount table. The method of claim 8,
The control unit,
And upon detecting the quantity of quantity, detecting the quantity of quantity based on the deceleration speed or the rate of deceleration of the motor in a plurality of periods during the off period. The method of claim 8,
The control unit,
The laundry processing apparatus, characterized in that for carrying out the detection of the amount of capacity when the deceleration speed of the motor is between 30 rpm and 90 rpm.

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