KR20210136698A - A control method of the laundry apparatus - Google Patents

Abstract

The present invention relates to a control method of a laundry treatment apparatus, capable of preventing washing delay or reducing noise and vibration by varying the number of laundry disentangling before rotating a drum at high speed according to whether laundry can be easily disentangled. The control method of the laundry treatment apparatus according to the present invention includes a water supply step, a drum rotation step, a drain step, a preparation step for rotating the drum to detect an unbalancing value of laundry, a laundry disentangling step for repeating forward and reverse rotations of the drum to remove entanglement of the laundry when the unbalancing value is equal to or greater than an allowable value, and a high speed rotation step for rotating the drum at a reference speed or more when the unbalancing value is equal to or greater than the allowable value.

Description

A control method of the laundry apparatus

The present invention relates to a method for controlling a laundry treatment apparatus.

In general, a clothes treatment device refers to a device capable of washing or drying clothes or the like, or washing or drying clothes. Here, the laundry treatment apparatus may perform only a washing or drying function, or may perform both washing and drying functions.

In general, when the laundry treatment apparatus is provided as a washing machine including a drum capable of applying a physical force by rotating clothes, the laundry treatment apparatus applies a physical force to the clothes to remove foreign substances, and separates the foreign substances from the clothes. A rinsing process and a dehydration process for removing moisture from the clothes may be performed.

In general, the dehydration cycle rotates at a faster speed than the rotation speed of the drum accommodating the clothes in the washing cycle or the rinsing cycle. Accordingly, there may be differences in drum rotation speed, acceleration, and allowable vibration values for performing the dehydration cycle according to the amount of clothes. Therefore, the conventional laundry treatment apparatus can sense the amount of laundry before performing the dehydration cycle.

On the other hand, since the dehydration cycle is performed after the washing cycle or the rinsing cycle, the clothing corresponds to a wet cloth soaked in water. Therefore, even if the amount of dry cloth is sensed before the washing cycle, it may be necessary to additionally sense the amount of wet cloth before the spin-drying cycle because the amount of wet cloth may vary depending on the material or condition of the clothes.

1 illustrates a process of performing a dehydration cycle of a conventional laundry treatment apparatus.

Referring to FIG. 1A , in the conventional laundry treatment apparatus, when a washing cycle or a rinsing cycle is finished, the drum stops rotating and the drain pump is driven. When the drainage is completed, the conventional laundry treatment apparatus may perform a laundry weight sensing step (S1) of accelerating and decelerating the drum and sensing the amount of dewatering or wet cloth by measuring the current value of the driving unit that rotates the drum. .

Thereafter, after performing the cloth dispersion step (S2) of rotating the drum at a first speed lower than the drum rotation speed during the rinsing cycle rather than the washing cycle, the passing step (S3) of raising the drum above the resonance speed is performed. And, the unbalance detection step (S4) of detecting the degree of unbalance of the clothes by rotating the drum at a second speed higher than the resonance speed may be performed.

The conventional laundry treatment apparatus performs an acceleration step (S5) of accelerating the drum to a third speed capable of removing moisture from the clothes when the unbalance detection value according to the amount of wetted clothes is less than or equal to the reference value, and then moves the drum to the third speed. A dehydration step (S6) of removing moisture from clothes while maintaining the speed may be performed.

Referring to FIG. 1(b), the conventional clothing processing apparatus additionally performs the cloth unwinding step (s2) when the degree of aggregation of clothes in a specific area of the drum (hereinafter, the degree of unbalance) during the dehydration cycle is greater than the allowable value. can After the end of the cloth unwinding step (s2), it is sensed again whether the degree of unbalance is equal to or greater than the allowable value, and if it is still greater than the allowable value, the cloth unwinding step (s2) may be repeated.

In this way, when the cloth unwinding step (s2) is performed, excessive vibration is prevented from occurring in the acceleration step (s5) or the dehydration step (s6), so that stability can be maximized.

However, the degree of unbalance may be easily resolved when the cloth unwinding step (s2) is performed for the fabric or characteristics of the garment, and on the contrary, the degree of unbalance may not be easily resolved even if the cloth unwinding step (s2) is performed.

If the degree of unbalance is not easily resolved even if the fabric or characteristics of the garment are repeatedly performed in the fabric unwinding step (s2), it may be inefficient to repeatedly perform the fabric unwinding step (s2).

However, the conventional laundry treatment apparatus has a problem in that the dehydration time is delayed by meaninglessly repeating the cloth unwinding step (s2) despite the difficulty in resolving the unbalance of the cloth quality or characteristics of the clothing.

In addition, if the degree of unbalance in the fabric or characteristics of the garment can be easily resolved in the cloth unwinding step (s2), the dehydration step (s6) is performed by additionally performing the cloth unwinding step (s2) to lower the degree of unbalance as much as possible. and vibration.

However, the conventional laundry treatment apparatus has a problem in that noise and vibration cannot be lowered by mechanically applying an allowable value despite the fact that unbalance of fabric or characteristics of clothing can be easily resolved.

An object of the present invention is to provide a laundry treatment apparatus capable of detecting a state of clothing and changing an allowable unbalance value for entering a spin-drying step.

An object of the present invention is to provide a laundry treatment apparatus capable of preventing a delay in spin-drying time or reducing noise and vibration by varying the number of times of performing the unwinding step according to the fabric of clothes.

An object of the present invention is to provide a laundry treatment apparatus capable of setting different dewatering entry conditions by determining whether clothing is made of a material that can be easily unwrapped or clothing is not easily unwrapped.

In order to solve the above problems, the present invention provides a laundry treatment apparatus that detects the fabric of clothes after the draining step and determines to change the allowable value, which is the maximum degree of unbalance that allows the spin-drying to enter.

The laundry treatment apparatus of the present invention may sense the cloth quality of the clothes by varying the speed of the drum and measuring the current of the driving unit. Specifically, it is possible to sense the cloth of the clothes by accelerating and then decelerating the speed of the drum.

Even if the cloths of the clothes are bundled or twisted, they can be classified to a degree that the clothes can be evenly distributed through forward and reverse rotation of the drum or water supply/drainage. If the sensed drum tissue is greater than or equal to the reference value at which the unbalanced state can be resolved to a certain level in the fabric unwinding step, the allowable value is decreased, and if the detected drum fabric is less than or equal to the reference value, the allowable value can be increased have.

In addition, when the sensed drum thickness corresponds to the reference value, the allowable value may be maintained.

Accordingly, when the garment is easily unwrapped, it is possible to reduce noise and vibration by allowing the clothes to enter the dehydration cycle after more fabric unwinding is performed.

In addition, when the garment is difficult to unwind, it is possible to prevent the dehydration operation from being delayed by omitting the meaningless cloth unwinding and directly entering the dewatering cycle.

Of course, even if it is difficult to unwind, if the degree of vibration or unbalance of the drum exceeds a limit value, the cloth unwinding may be performed, and in severe cases, dehydration may be stopped.

Accordingly, the laundry treatment apparatus of the present invention can optimize the unbalance tolerance value by detecting the fabric quality of the clothes through the control of the driving unit 9 .

The laundry treatment apparatus of the present invention has the effect of being able to change the allowable unbalance value for entering the spin-drying step by sensing the state of the clothes.

The laundry treatment apparatus of the present invention has the effect of preventing a delay in spin-drying time or reducing noise and vibration by varying the number of times of performing the cloth unwinding step according to the quality of the cloth.

The laundry treatment apparatus of the present invention has the effect of being able to set different dewatering entry conditions by determining whether the clothes are made of a material that can be easily unwrapped or whether the clothes are made of a material that is difficult to be unwrapped.

1 illustrates a dehydration process of a conventional laundry treatment apparatus.
2 shows the structure of the laundry treatment apparatus of the present invention.
3 is a diagram illustrating a control structure for controlling the driving unit of the laundry treatment apparatus according to the present invention.
4 is a diagram illustrating a process in which the laundry treatment apparatus of the present invention detects cloth.
5 is a diagram illustrating a method for the laundry treatment apparatus of the present invention to sense cloth through a driving unit.
6 is a view showing a control method for changing the allowable value for entering the dewatering according to the fabric of the laundry treatment apparatus of the present invention.
Fig. 7 shows an operation mode of the laundry treatment apparatus of the present invention.

Hereinafter, embodiments disclosed herein will be described in detail with reference to the accompanying drawings. In this specification, even in different embodiments, the same and similar reference numerals are assigned to the same and similar components, and the description is replaced with the first description. As used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical spirit disclosed in the present specification by the accompanying drawings.

Figure 2 shows the structure of the laundry treatment apparatus of the present invention.

Fig. 2(a) shows the exterior of the laundry treatment apparatus of the present invention, and Fig. 2(b) shows the internal configuration of the laundry treatment apparatus of the present invention.

Referring to FIG. 2A , the laundry treatment apparatus 100 according to an embodiment of the present invention may include a cabinet 1 that forms an exterior, and the cabinet 1 includes putting clothes into the drum or putting clothes into the drum. An inlet 12 for taking out stored clothes and a door 13 for opening and closing the inlet 12 are provided.

In this case, when the laundry treatment apparatus of the present invention is provided as a top-load type laundry treatment apparatus having the input unit 12 provided on the upper portion, the cabinet 1 has an upper panel forming the upper surface of the laundry treatment apparatus. (11) may be further provided, and the upper panel 11 may be provided in combination with the cabinet (1). The upper panel 11 may be provided with the inlet 12 , and the door 13 may be coupled thereto.

Referring to FIG. 2(b), the laundry treatment apparatus 100 of the present invention may be provided with a tub 3 provided inside the cabinet to store water, and a drum 4 provided inside the tub to store clothes. can

Meanwhile, it is not excluded that the inlet 12 of the laundry treatment apparatus is provided as a front load type provided in front of the cabinet 1 .

The upper panel 11 may be provided parallel to the ground. In addition, as shown in FIG. 2 , the upper panel 11 may be inclined so that the rear of the cabinet 1 is higher than the front. This enlarges the volume of the upper area of the cabinet 1 to secure a space in which various components such as the water supply unit 21 can be installed inside the cabinet 1 and at the same time, allows the user to easily insert the tub 3 into the inlet. (33) to be accessible.

A control panel 14 for controlling the operation of the laundry treatment apparatus may be provided in front of the upper panel 11 , and a display unit 14b for displaying the current state of the laundry treatment apparatus may be provided. Specifically, the control panel 14 may include a display unit 14b for displaying the state of the laundry treatment apparatus and an input unit 14a for inputting an operation command to the laundry treatment apparatus. The display unit 14a may be provided as a display unit having a liquid crystal, and the input unit 14b may be provided as a button or a touch panel.

The tub 3 accommodated and provided inside the cabinet 1 includes a tub body 31 providing a space for storing water, and a tub body 31 provided on the upper surface of the tub body 31 to connect the inlet 11 and It may include a communicating tub inlet (33). In addition, the tub 3 may include a tub cover 37 to prevent backflow and outflow of water accommodated in the tub 3 . The tub cover 37 is provided on the upper side of the tub body 31, and the tub inlet 33 is provided on the inner peripheral surface.

The tub body 31 may be fixed to the cabinet 1 through the tub support part 35 . The tub support part 35 is composed of a spring, a damper, etc. to reduce the vibration of the tub 3 . The tub body 31 may receive water through the water supply unit 21 and store water. The water supply unit 21 may include a water supply pipe 211 connected to an external water supply source, and a water supply valve 212 for controlling the flow rate of water moving the water supply pipe 211 by adjusting the opening degree of the water supply pipe 211. . In addition, although not shown, the water supply pipe 211 may be provided separately as a cold water pipe and a hot water pipe.

The water supply pipe 211 may be provided extending from the water supply valve 212 to the upper portion of the tub inlet 33 , and may be provided in communication with one side of the tub cover 37 or one side of the tub body 31 . can That is, the water supply pipe 211 may be provided in any shape and structure as long as it can supply water to the tub 3 .

The water stored in the tub 3 is discharged to the outside of the cabinet 1 through the drain 22 , and the drain 22 guides the water inside the tub 3 to the outside of the cabinet 1 . It may include a drain pipe 221 and a drain pump 222 .

Although not shown, the drain pipe 221 may be provided to extend a predetermined length from the bottom surface of the tub 3 to the upper portion of the tub 3 so that the tub 3 can store water. The tub 3 may be provided with a water level sensing unit 9 for measuring the water level inside the tub 3 .

The drum 4 may include a drum body 41 providing a space for storing clothes, and a drum base 42 constituting the bottom surface of the drum 4 . A drum inlet 43 communicating with the tub inlet 33 may be provided on the drum body 41 .

The drum body 41 and the drum base 42 may be rotatably provided inside the tub 3 , and the inner circumferential surface of the drum body 41 and the drum base 42 have the inside of the tub 3 . A plurality of through-holes 411 for introducing water into the drum 4 may be provided.

On the other hand, the inner circumferential surface of the drum body 41 may be provided with a flow path portion 44 capable of moving water from the lower end of the drum 5 to the upper portion of the drum 5 . That is, the flow path portion 44 may be provided extending from the drum base 42 to a predetermined height of the inner peripheral surface of the drum body 41 .

The flow path part 44 constitutes the main body of the flow path part and includes a flow path body 411 forming a flow path for moving water near the drum base 42 to the upper side of the drum body 41, and the flow path body ( It is provided at the lower portion of the 441) and may include an inlet 442 through which water inside the drum 4 is introduced. In this case, the flow path body 441 may be formed as a flow path through which water introduced from the lower part of the drum 4 flows to the upper part of the drum 4 , but may be provided as a housing having an opening toward the drum body 41 . can

The flow path body 441 may be provided on the outer wall of the drum body 41 or may be provided extending from the drum base 42 to the inner circumferential surface of the drum body 41 .

The flow path body 441 may be configured on an outer wall of the drum body 41 , and one surface of the flow path body may form one surface of the drum body 41 .

The drum 4 may further include a cutout 423 provided through the drum base 42 so as to deliver the water accommodated in the drum 4 to the flow passage 44 . Accordingly, the water inside the drum 4 may flow out through the cutout 423 and flow into the inlet 412 provided in the flow path 44 . That is, the water inside the drum 4 may flow out of the drum body 41 and reflow into the flow path 44 provided in the drum body 41 .

Meanwhile, the flow path part 44 may include a filter part 7 for filtering the water introduced into the flow path part 44 and then discharging it back to the drum. The filter unit 7 is preferably provided on one surface of the flow path body 441 facing the drum body 41 since the water introduced into the flow path unit 44 must be discharged back to the drum 4 .

In addition, the filter part 7 may form one surface of the flow path body 411 , and may be provided as a separate member from the flow path body 441 to be detachably provided on the flow path part 44 . Accordingly, the filter part 9 may be provided to form an inner peripheral surface of the drum body 41 . In a process where water from the lower part of the drum 4 is introduced into the flow path 44 and discharged to the filter part 7 , foreign substances contained in the water contained in the drum 4 may be removed.

On the other hand, the drum 4 may include a water flow forming part 6 which flows out the water inside the drum 4 through the cutout 423 and forms a pressure and water flow for flowing it into the flow passage 44 . can

The water flow forming part 6 may be rotatably provided in the drum base 42 , and may rotate separately from the drum 4 . The water flow forming part 6 may rotate on the drum base 42 to form a water flow, so that a portion of the water in the drum 4 may flow out to the cutout 423 . The water flow forming part 6 is provided with a disk-shaped water flow forming body 61 accommodated in the drum base 42, and protruding from an upper portion of the water flow forming body 61, and radially from the water flow forming body. It may include a stirring blade (62) extending to the pumping blade (63) protruding from the lower portion of the water flow forming body (61) to push the water of the drum base (42). At this time, in order to induce stable rotation of the water flow forming part 6 and to minimize the interference with the drum base 42, the length of the stirring blade 62 and the pumping blade 63 is the water flow forming body 61. It may be provided smaller than the diameter of The water flow forming unit 6 transmits mechanical force to the clothes accommodated inside the drum 4 due to the stirring blade 62 or forms a water flow inside the drum body 41 to improve cleaning power. do.

In addition, the water flow forming unit 6 may serve to circulate the water in the drum 4 by introducing the water accommodated in the drum 4 into the flow path 44 due to the pumping blade 63 . have. The water flow forming unit 6 may be rotated by the driving unit 9 .

The driving unit 9 includes a stator 911 fixed to the outside of the tub body 31 to generate a rotating magnetic field, a rotor 913 rotating by the rotating magnetic field of the stator 911, and the tub body 31 . ) may include a rotating shaft 914 connecting the water flow forming part 6 and the rotor 913 through the bottom surface of the .

When the water flow forming unit 6 is rotated by the driving unit 9 , the water stored in the drum 4 may move along the rotational direction of the stirring blade 62 and the pumping blade 63 . At this time, since the water flow forming unit 6 is provided on the drum base 42 , the driving unit 9 is preferably provided at the lower end of the tub 3 .

On the other hand, the drum (4) is provided on the outer wall of the drum (4) a guide part (5) for guiding the water flowing out of the drum (4) by the water flow forming part (6) to the flow path part (44) ) may be further included. That is, the drum 4 and the flow path part 44 may communicate with each other by the guide part 5 .

3 is a block diagram showing an internal block diagram in which the laundry treatment apparatus of the present invention can control the driving unit 9 with an electric current.

Referring to FIG. 3( a ), the laundry treatment apparatus 100 of the present invention controls the driving unit 9 by applying a current to the driving unit 9 , and can sense even the current discharged from the driving unit 9 . It may include a control unit (P).

The control unit P controls the driving unit 9 according to a preset course or option, and the driving unit 9 rotates the drum 4 according to the command of the control unit P.

The control unit P operates by receiving an operation signal or a control command from the input unit 14a. The input unit 14a may include a washing course for performing washing, rinsing, and spin-drying operations and an option selection unit. Accordingly, washing, rinsing, and dehydration operations may be performed. Also, the control unit P may control to display the washing course, washing time, spin-drying time, rinsing time, or the like, or the current operating state, through the display unit 14b.

The control unit P may control the driving unit 9 to not only rotate the drum 4 but also to change the rotational speed of the drum 4 . Specifically, the control unit (P) is based on at least one of a current detection unit (225) that detects an output current flowing through the driving unit (9) and a position detection unit (220) that detects the position of the driving unit (230). The driving unit 9 can be controlled. For example, any one of a current detected by the driving unit 9 or a sensed position signal may be fed back to the control unit 210 , and the control unit 210 may appropriately adjust the driving unit 9 according to the feedback signal. It is possible to generate a current signal that can be tightly controlled.

Meanwhile, in the laundry treatment apparatus of the present invention, the position detecting unit 235 may be omitted and the position of the driving unit 9 may be detected through implementation of a separate algorithm. (aka, sensorless driving unit) The sensorless driving unit 9 is configured such that the control unit P measures the current or voltage output from the driving unit 9 to determine the position of the rotor or stator in the driving unit 9 . can be provided.

Hereinafter, an embodiment in which the control unit P controls the driving unit 9 will be described.

The driving unit P may be provided as a three-phase motor so that the rotation speed can be controlled, for example, it may be provided as a BLDC motor.

Referring to FIG. 3B , the controller P may include an inverter 420 and an inverter controller 430 to control the above-described rotor and stator. In addition, the control unit P may further include a converter 410 and the like for supplying DC power input to the inverter 420 .

That is, the control unit P may simultaneously perform the role of the inverter control unit 430 . Of course, the inverter control unit 430 may be provided separately from the control unit (P). When the inverter control unit 430 outputs a pulse width modulation (PWM) switching control signal Sic to the inverter 420 , the inverter 420 performs a high-speed switching operation to transmit AC power of a predetermined frequency to the rotor 913 . ) and the stator 911 can be supplied.

The laundry treatment apparatus of the present invention may further include a converter 410, an inverter 420, and an inverter controller 430, as well as a DC terminal voltage detector (B), a smoothing capacitor (C), and an output current detector (E). have. In addition, the laundry treatment apparatus of the present invention 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 (vs) and the converter 410 to perform power factor correction or boosting operation. In addition, the reactor L may perform a function of limiting the harmonic current caused by the high-speed switching of the converter 410 .

The input current detection unit A may detect an input current is input from the commercial AC power source 405 . To this end, as the input current detection unit A, a current transformer (CT), a shunt resistor, or the like may be used. The detected input current is 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 405 through the reactor L into DC power and outputs it. Although the figure shows the commercial AC power source 405 as a single-phase AC power source, it may be a three-phase AC power source. 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 a rectification operation without a separate switching operation. For example, in the case of a single-phase AC power supply, four diodes may be used in the form of a bridge, and in the case of a three-phase AC power, six diodes may be used in the form of a bridge.

The converter 410 may be a half-bridge 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, a step-up operation, a power factor improvement, and a DC power conversion may be performed by a switching operation of the corresponding switching element.

The smoothing capacitor C smoothes the input power and stores it. In the drawings, one device is exemplified as the smoothing capacitor C, but a plurality of devices may be provided to ensure device stability.

The converter 410 may be connected to the output terminal, but DC power may be directly inputted. For example, DC power from the solar cell may be directly input to the smoothing capacitor C or may be inputted after being converted to DC/DC. Since DC power is stored at both ends of the smoothing capacitor C, it may be referred to as a dc terminal or a dc link terminal.

The dc terminal voltage detector B may detect a dc terminal voltage Vdc that is both ends of the smoothing capacitor C. To this end, the dc terminal voltage detection unit B may include a resistance element, 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, and converts the smoothed DC power (Vdc) by the on/off operation of the switching elements into three-phase AC power (va, vb, vc) of a predetermined frequency, and a driving unit (9) can be output. The inverter 420 is a pair of upper-arm switching elements (Sa, Sb, Sc) and lower-arm switching elements (S'a, S'b, S'c) connected in series with each other, and a total of three pairs of upper and lower arms The switching elements may be connected to each other in parallel (Sa&S'a, Sb&S'b, Sc&S'c).

A diode is 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 turn on/off the respective switching elements based on the inverter switching control signal Sic from the inverter controller 430 . Thereby, the three-phase AC power having a predetermined frequency is output to the driving unit 9 .

The inverter controller 430 may control a switching operation of the inverter 420 . To this end, the inverter control unit 430 may receive the output current io detected by the output current detection unit E as an input.

The inverter controller 430 outputs the 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 pulse width modulation (PWM) switching control signal, and is generated and output based on the output current value io detected by the output current detection unit E. As shown in FIG.

The control unit (P) may sense the state of the inside of the drum by detecting the output current value (io) detected by the current detection unit (220). In addition, the control unit (P) may detect a state inside the drum based on the position signal (H) sensed by the position detection unit (235). For example, while the drum 40 is rotating, based on the output current value and the current value io of the driving unit 9 , the amount of laundry, the spin rate, the moisture content, etc. may be sensed. In addition, the control unit (P) may detect the amount of eccentricity of the drum (4), that is, the unbalance (UB) of the drum (4). Sensing the amount of eccentricity may be performed based on a ripple component of the current io detected by the current detector 220 or a change amount of the rotation speed of the drum 4 .

In addition, the control unit (P) may sense the state inside the drum by sensing the input current value (is) input to the inverter control unit. The process and calculation method of detecting the state inside the drum through the current value will be described later.

The output current detection unit E may be provided to detect the output current io flowing between the inverter 420 and the three-phase driving unit 9 . The output current detection unit E detects a current flowing through the driving unit 9 . The output current detection unit E may detect all of the output currents ia, ib, and ic of each phase, and may also detect the output currents of the two phases using three-phase balance.

The output current detecting unit E may be positioned between the inverter 420 and the driving unit 9 , and a current transformer (CT), a shunt resistor, or the like may be used to detect the current. When the shunt resistor is used, three shunt resistors are located between the inverter 420 and the driving unit 9 or the three lower arm switching elements S'a, S'b, S'c of the inverter 420 . ) may have one end connected to each.

On the other hand, using three-phase equilibrium, it is also possible that two shunt resistors are used. In addition, when one shunt resistor is used, it is also possible that the shunt resistor is disposed between the above-described capacitor C and the inverter 420 .

The detected output current io is a discrete signal in the form of a pulse, and may be applied to the inverter control unit 430 , and an inverter switching control signal Sic is generated based on the detected output current io do. Hereinafter, it is assumed that the detected output current io is the three-phase output current ia, ib, ic.

On the other hand, the three-phase driving unit 9 has a stator and a rotor, and each phase AC power of a predetermined frequency is applied to the coils of the stators of each phase (a, b, c phase), and the rotor rotates. will do

The driving unit 9 is a surface-mounted permanent magnet synchronous motor (Surface-Mounted Permanent-Magnet, Synchronous Motor; SMPMSM), an interior permanent magnet synchronous motor (IPMSM), and a synchronous reluctance motor (Synchronous) Reluctance Motor; Synrm) and the like. Among them, SMPMSM and IPMSM are Permanent Magnet Synchronous Motor (PMSM) applied with permanent magnet, and Synrm is characterized by no permanent magnet.

Meanwhile, when the converter 410 includes a switch element, the inverter controller 430 may control a switching operation of the switching element in the converter 410 . To this end, the inverter control unit 430 may receive the input current is detected by the input current detection unit A. 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) type switching control signal, and may be generated and output based on the input current is detected by the input current detection unit A.

Meanwhile, the position sensing unit 235 may detect the rotor position of the driving unit 9 . To this end, the position detecting unit 235 may include a Hall sensor. The sensed rotor position (H) is input to the inverter control unit 430 to be used as a basis for speed calculation and the like.

3( c ) shows an embodiment of a specific circuit structure in which the inverter control unit 430 controls the driving unit 9 . 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) may be included.

The axis conversion unit 510 receives the three-phase output current (ia, ib, ic) detected by the output current detection unit E, and converts it into the two-phase current (iα, iβ) of the stationary coordinate system. 510 may convert the two-phase currents (iα, iβ) of the stationary coordinate system into the two-phase currents (id, iq) of the rotational coordinate system.

The speed calculating unit 520 may calculate the speed based on the position signal H of the rotor input from the position detecting unit 235 . That is, based on the position signal, by dividing with respect to time, it is possible to calculate the velocity. The speed calculator 520 may output the calculated position and the calculated speed based on the input position signal H of the rotor.

)와 속도 지령치(ω*r)에 기초하여, 전류 지령치(i*q)를 생성한 다. 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(iq)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.The current command generation unit 530, the calculation speed (

) and the speed command value (ω*r), the current command value (i*q) is generated. For example, the current command generation unit 530 may set the calculation speed (

) and the speed command value ω*r, the PI controller 535 may perform PI control and generate a current command value iq. In the drawing, the q-axis current command value (i*q) is exemplified as the current command value, but unlike the drawing, it is also possible to generate the d-axis current command value (i*d) together. On the other hand, the value of the d-axis current command value (i*d) may be set to 0.

On the other hand, the current command generation unit 530, the current command value (i * q) may further include a limiter (not shown) for limiting the level so as not to exceed the allowable range. Next, the voltage command generation unit 540, the d-axis and q-axis current (id, iq) axis-transformed into the two-phase rotation coordinate system in the axis transformation unit, and the current command value (i*) from the current command generation unit 530 , etc. d,i*q), d-axis and q-axis voltage command values (v*d,v*q) are generated. For example, the voltage command generating unit 540 performs PI control in the PI controller 544 based on the difference between the q-axis current iq and the q-axis current command value i*q, and the q-axis current command value (i*q). A voltage setpoint (v*q) can be generated. In addition, the voltage command generator 540 performs PI control in the PI controller 548 based on the difference between the d-axis current id and the d-axis current command value i*d, and the d-axis voltage command value (v*d) can be created. On the other hand, the value of the d-axis voltage command value (v*d) may be set to 0 corresponding to the case where the value of the d-axis current command value (i*d) is set to 0.

On the other hand, the voltage command generation unit 540, d-axis, q-axis voltage command values (v * d, v * q) may further include a limiter (not shown) for limiting the level so as not to exceed the allowable range. .

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

)와, d축, q축 전압 지령치(v*d,v*q)를 입력받아, 축변환을 수행한다. 먼저, 축변환부(550)는, 2상 회전 좌표계에서 2상 정지 좌표계로 변환을 수행한다. 이때, 속도 연산부(520)에서 연산된 위치(

)가 사용될 수 있다.The axis conversion unit 550, the position calculated by the speed calculating unit 520 (

) and d-axis and q-axis voltage command values (v*d, v*q) are received, and axis transformation is performed. First, the axis transformation unit 550 performs transformation from a two-phase rotational coordinate system to a two-phase stationary coordinate system. At this time, the position calculated by the speed calculating unit 520 (

) can be used.

Then, the axis transformation unit 550 performs transformation from the two-phase stationary coordinate system to the three-phase stationary coordinate system. Through this conversion, the axis conversion unit 1050 outputs a three-phase output voltage command value (v*a, v*b, v*c).

The switching control signal output unit 560 generates a switching control signal (Sic) for an inverter according to a pulse width modulation (PWM) method based on the three-phase output voltage command value (v*a, v*b, v* c) to output

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

Meanwhile, the switching control signal output unit 560 may generate and output an inverter switching control signal Sic in which a two-phase pulse width modulation method and a three-phase pulse width modulation method are mixed in relation to an embodiment of the present invention. have.

For example, to generate and output an inverter switching control signal (Sic) by a three-phase pulse width modulation method in an accelerated rotation section to be described later, and to detect a counter electromotive force in a constant speed rotation section, an inverter using a two-phase pulse width modulation method The switching control signal Sic may be generated and output.

4 is a diagram illustrating a method in which the laundry treatment apparatus of the present invention senses the state of clothes through the driving unit.

The laundry treatment apparatus of the present invention may determine to change a setting value of at least one of a washing cycle, a rinsing cycle, and a dehydration cycle by detecting the state of the clothes.

For example, the laundry treatment apparatus of the present invention may sense the state of the clothes and adjust the intensity of at least one of a washing cycle, a rinsing cycle, and a dehydration cycle.

The state of the clothes may include at least one of a laundry weight of the clothes, a dehydration rate of the clothes, a moisture content of the clothes, and a cloth quality of the clothes.

The laundry treatment apparatus of the present invention can calculate and recognize the cloth quality, the laundry amount, the dehydration rate, the moisture content, etc.

The control unit P of the laundry treatment apparatus of the present invention may sense the dry laundry amount (i) and the wet cloth amount (ii) in a manner that detects the laundry amount through the driving unit 9 . The dry cloth amount (i) may be the laundry amount of the clothes before the water supply process is performed, and the wet cloth amount (ii) may be the laundry amount of the clothes after the drainage process is completed.

Also, the control unit P may determine the moisture content of the clothes based on the difference between the amount of dry cloth and the amount of wet cloth, and may determine the dehydration rate or dehydration degree of the clothing by detecting the change in the amount of wet cloth.

In addition, the control unit (P) considers the current pattern (iii) discharged from the driving unit (9) and the speed pattern (iv) at which the drum 30 rotates according to the current applied to the driving unit (9). It can be used to determine the porosity of

The control unit (P) calculates all of the plurality of factors such as the dry cloth amount (i), the wet cloth amount (ii), the current pattern (iii), and the speed pattern (iv) in a deep learning method through a parallel computing device to form the fabric of the garment. can detect

Specifically, the control unit (P) receives at least two or more data among the RPM waveform, the current value or the current waveform, and the magnitude of the vibration amount and comprehensively analyzes it to determine the weight of the clothing, the state of the clothing, the type of clothing, etc. Thereby, it is possible to precisely control the RPM of the drum.

For example, the controller P of the present invention processes the waveform of the RPM as a neural network through a parallel computing device, processes the input current value with an artificial neural network, and then a decision that can mix and process them Through the Neural Network, new factors such as weight, condition, and type of laundry can be identified.

Specifically, the waveforms of the RPM, current, and vibration input to the control unit P appear dependently according to the type, weight, and control RPM of the clothes in the washing machine. Therefore, if the Decision Neural Network obtained by the parallel association device includes information on the representative values previously tested according to the weight of the load and the control RPM, the type of clothing when the measurement data generated inside the washing machine is inversely calculated with an artificial neural network and weight can be accurately calculated.

Through this, the control unit P of the laundry treatment apparatus according to the present invention can determine the quality of the cloth contained in the drum 4 due to the operation of the parallel calculation apparatus. Specifically, the control unit P may detect whether the cloth is easily untied or is difficult to unravel even if the clothing is bundled.

For example, fabrics that are easy to unwrinkle may be rough and thick materials such as blue jackets and jeans that are difficult to wrinkle or fold, and fabrics that are not well unwrapped may be materials that are thin and well crumpled, such as shirts, and can be easily bundled and twisted. And, the cloth with an average cloth unrolling may correspond to cloth such as a towel or cloth when general clothing is combined.

5 is a diagram illustrating an embodiment of sensing the cloth of clothing.

According to the present invention, the laundry amount of the clothing is sensed through the current applied or output from the driving unit 9, and the dry cloth amount (i), the wet cloth amount (ii), the moisture content, and the dehydration rate are calculated based on the laundry amount. It can even detect the fossa. Accordingly, the detection of the amount of clothes is the minimum information for detecting the state of the clothes.

The laundry treatment apparatus of the present invention may perform the acceleration/deceleration step (A41) of detecting the amount of laundry in the drum 30 before performing the washing cycle, before performing the rinsing cycle, and before performing the dehydration cycle.

The acceleration/deceleration step A41 may be performed when there is no water in the drum. For example, the acceleration/deceleration step A41 may be performed when the drainage is completed or before the water supply step. This is to accurately detect the state of the clothes.

The acceleration/deceleration step A41 may be performed after a standby step of maintaining the current applied to the driving unit 9 or detecting whether drainage is complete.

The acceleration/deceleration step (A41) includes an acceleration step (A411) of accelerating the drum (30), a deceleration step (A413) of decelerating the drum (30), and measurement of the acceleration of the driving unit (9) during the acceleration step (A413) A laundry weight sensing step (A414) of detecting the laundry amount of the clothes accommodated in the drum through the value and the deceleration measurement value of the driving unit during the deceleration step may be performed.

An intermediate step (A412) of stopping the current supply for accelerating the drum may be further set between the acceleration step (A411) and the deceleration step (A413).

The laundry treatment apparatus of the present invention detects an acceleration measurement value measured by or applied to the driving unit 9 while accelerating the driving unit 9 , and decelerating the driving unit 9 while decelerating the driving unit 9 . The measured deceleration value measured in or applied to the driving unit 9 is sensed.

Thereafter, the amount of clothes contained in the drum 30 is sensed by calculating the measured acceleration value and the measured deceleration value.

The acceleration measurement value and the deceleration measurement value may be a command value applied to the driving unit 9 while driving the driving unit 9, and may be a measurement value measured by the driving unit 9 while driving the driving unit 9 have.

For example, the command value may be a current command value or a voltage command value derived from the PI controller 535 applied to drive the driving unit 9, and the measured value is the position sensing unit 235 or current It may be a current value or a voltage value of the driving unit 9 measured by the sensing unit 225 itself.

Accordingly, in the laundry treatment apparatus of the present invention, the time required for sensing the laundry amount can be greatly reduced by omitting the step of maintaining the driving unit 9 to be driven at a constant speed.

In addition, the laundry treatment apparatus of the present invention can save not only the process of maintaining the driving unit 9 at a constant speed, but also energy and time required for maintaining the constant speed. In addition, in the laundry treatment apparatus of the present invention, the frictional force of the driving unit 9 itself, which must be overcome when the driving unit 9 is maintained at a constant speed, can be completely ignored in the calculation process.

When the control unit P uses the command value when detecting the laundry amount, the control unit P feeds back the actual situation to the driving unit 9 or the actual driving situation of the driving unit 9 no need to consider Accordingly, it can be simple and easy for the control unit P to calculate the laundry amount value. In addition, since the formula for calculating the laundry amount is simplified, the laundry weight value can be obtained quickly.

Specifically, the acceleration measurement value may include the acceleration current value Iq_Acc measured by the driving unit 9 , and the deceleration measurement value may include the deceleration current value Iq_Dec measured by the driving unit 9 . .

The acceleration current value includes a current command value (Iq*_Acc) for rotating the driving unit 9 during the acceleration step, and the deceleration current value is a current command value for rotating the driving unit 9 during the deceleration step. It may contain a value (Iq*_Dec).

On the other hand, when the control unit P uses the measured value when detecting the laundry weight, the actual situation is reflected in the driving unit 9 as it is, so that the laundry weight value can be accurately obtained.

And, the command value is generated only when the driving unit 9 is driven or the power is applied to be actively controlled. Therefore, using the measured value has an advantage in that data for detecting the laundry amount can be obtained even when the power to the driving unit 9 is cut off or the driving unit 9 is not actively controlled.

In the laundry treatment apparatus of the present invention, power may be cut off in the deceleration step (A413) to decelerate the driving unit 9 using a power generation braking method or the like. Accordingly, an algorithm for controlling the deceleration step A413 may be omitted, and energy for the deceleration step A413 may be saved.

Furthermore, since the power is cut off in the deceleration step (A413), the voltage command value may be 0. Therefore, according to the present invention, the amount of laundry can be detected by calculating only the current excluding the voltage.

That is, the control method of the laundry treatment apparatus according to the present invention may ignore or not use the voltage command value or the voltage value itself, and use only the current value, so that the calculation formula for detecting the amount of laundry can be provided very simply. Since the calculation formula is simplified, the calculation can be performed quickly and accurately, and the amount of laundry can be accurately detected.

Specifically, data and an algorithm (hereinafter, an arithmetic expression) for calculating the measured acceleration value and the measured deceleration value may be stored in the control unit P. The arithmetic expression may be provided so as not to use a voltage value from the beginning. For this reason, since there is no need to calculate the counter electromotive force, the present invention can omit the constant speed rotation step of the driving unit 9 .

For example, the arithmetic expression of the present invention may be provided as follows.

Weight value of the present invention (inertia, Jm, Load_data)

can be calculated in the following way. The P and Ke are constant values of the driving unit 9 itself and can be measured by the control unit P, and the denominator corresponds to the difference between the speed change amount in the acceleration step and the speed change amount in the deceleration step.

The speed change amount may be measured by the control unit P due to the position sensing unit 235, calculated by measuring the time reached until the acceleration or deceleration, or immediately detected by measuring a current or the like.

Accordingly, according to the present invention, the laundry weight value can be calculated immediately by simply measuring the acceleration output current value Iq_Acc at the time of acceleration and the acceleration output current value Iq_Dec at the time of deceleration. That is, the acceleration current value includes the acceleration output current value (Iq_Acc) output from the driving unit during the acceleration step, and the deceleration current value includes the deceleration output current value (Iq_Dec) output from the driving unit during the deceleration step it can be seen that

Furthermore, an average value (Iqe_Acc) of the current values measured by the driving unit during the acceleration step may be applied to the acceleration output current value, and the deceleration output current value is an average value (Iqe_Dec) of the current values measured by the driving unit during the deceleration step. ) can be applied.

In any case, the laundry weight can be calculated using only one factor of the current value, and the factor of the voltage value can be omitted, thereby simplifying the laundry weight calculation and improving the speed and accuracy of the laundry weight value.

Accordingly, even if the time of the acceleration step is very short or the time of the acceleration step is very short, the laundry weight can be accurately detected, and thus the time required for detecting the laundry weight itself can be further reduced.

On the other hand, the laundry weight sensing apparatus of the present invention measures the laundry weight by decelerating immediately after accelerating. Therefore, the time itself for measuring the amount of laundry is very short, and the clothes inside the drum 30 cannot move or flow during the time. Accordingly, since the amount of laundry can be sensed in a short time in which the state of the clothes does not change, the accuracy of calculating the amount of laundry can be further improved.

Meanwhile, the formula applied to the weight sensing of the present invention uses the difference between the current value in the acceleration phase and the current value in the deceleration phase. Therefore, the frictional force of the driving part in the acceleration step and the frictional force of the driving part in the deceleration step are equal to each other, so the current compensation equation considering the frictional force cancels each other out. Therefore, in the method for controlling the weight sensing of the laundry treatment apparatus of the present invention, the frictional force of the driving unit 9 does not need to be taken into account, and thus the process of correcting or tuning the frictional force can be omitted. In addition, since the present invention does not use a voltage value, it is possible to omit the process of compensating for or tuning an error in the voltage value, and omitting the constant velocity process, thereby compensating or tuning the movement of clothes and the friction force of the driving unit 9 The process can be omitted. As a result, in the method of controlling the amount of laundry in the laundry treatment apparatus of the present invention, the amount of laundry is derived immediately after the current value is substituted, and since there is no procedure for compensating or tuning the amount, the amount of laundry can be detected very quickly and accurately.

Accordingly, the amount of load required for the control unit P can be reduced, the control unit P can be replaced with a relatively simple configuration, or the performance of the control unit P can be utilized in other ways.

On the other hand, as can be seen from the above formula, the measured acceleration value may further include the amount of speed change in the acceleration step A411 , and the measured deceleration value may further include the speed change amount in the deceleration step A413 .

The speed change amount of the acceleration step A411 and the speed change amount of the deceleration step A413 are only necessary to obtain the difference between the inertia of the acceleration step A411 and the inertia of the deceleration step A413, and separate voltage values, etc. may not be required, and further no compensation or tuning process is required.

In more detail, the arithmetic expression is derived by the following arithmetic expression.

At this time, since the laundry amount is calculated based on the difference between the acceleration inertia and the deceleration inertia, the amount of change in the speed is required.

Therefore, if the acceleration measurement value and the deceleration measurement value are measured in the same RPM section of the drum, the width of the speed change is the same, so that the calculation can be simpler. That is, the acceleration step (A411) and the deceleration step (A413) preferably share the same speed band.

On the other hand, in the control method of the laundry treatment apparatus of the present invention, the amount of laundry is sensed using a current command value or a current value measured by the driving unit 9 by performing an acceleration step A411 and a deceleration step A413 .

In this case, since the above formula uses a current value, the deceleration step A413 is first performed, and the current value is measured by performing the acceleration step A411 to detect the amount of laundry through the same formula.

On the other hand, the sensing step (A) is a preparation for maintaining the current applied to the driving unit 9 or stopping the current supply in order to set a reference value capable of performing the acceleration step (A411) and the deceleration step (A413). Step (Ba) may be performed. In the preparation step (Ba), the drum 30 may rotate at a constant rpm without being accelerated or decelerated.

The accelerating step (A411) may further accelerate the drum from the rpm of the rotating drum in the standby step to the determined speed, and the decelerating step (A413) may decelerate the drum from the determined speed. That is, the acceleration step A411 and the deceleration step A413 may be performed continuously. In the deceleration step (A413), the current command value directed to the driving unit 9 in the acceleration step A411 may be lowered or the voltage applied to the driving unit 9 may be cut off, so there is a risk of damage to the control unit P or the circuit. there is no

In this case, the acceleration measurement value and the deceleration measurement value may be measured between the determination speed and a first intermediate speed lower than the determination speed rpm. That is, the amount of laundry can be detected by measuring the current value in the section band including the vertex in the speed graph. This has the advantage of minimizing a situation in which an error may occur because the amount of laundry is detected by measuring the current value in a continuous situation.

Meanwhile, the acceleration measurement value and the deceleration measurement value may be measured between a first intermediate speed lower than the determination speed and a second intermediate speed higher than the first intermediate speed and lower than the determination speed. That is, although the section does not include the vertex, the amount of laundry can be detected by measuring the current value in the same speed section band. This has the advantage of improving the accuracy of weight calculation by measuring the stabilized current value because the speed change is the largest at the vertex.

In the deceleration step (A413), the rotation speed of the drum may be reduced to a detection speed that is lower than the reference speed before accelerating the rotation speed of the drum. This is to reliably receive the current value corresponding to the current value of the acceleration step (A411) as the rotational speed of the drum is actually reduced to the reference speed.

Meanwhile, the determination speed may be set to a lower rpm than a fixed rpm at which the clothes accommodated in the drum 30 are attached to the inner wall of the drum 30 .

Therefore, in the sensing step (B) of the laundry treatment apparatus of the present invention, the laundry amount can be measured even when the drum 30 is not rotated at a high speed, and the dehydration rate or moisture content is calculated based on the laundry amount, and accordingly, the laundry It is possible to determine whether the material is waterproof or whether there is a water balloon inside the clothing.

For example, when the moisture content is greater than or equal to the reference moisture content and the dehydration rate is lower than the reference dehydration rate, it may be determined that the fabric of the clothing is a fabric that does not drain easily.

That is, if the amount of cloth detected in the dehydration step is defined as the amount of detected cloth (WC), the moisture content is the value obtained by dividing the amount of the detected cloth by the standard amount of cloth (Io), which is the amount of dry cloth, and the dehydration rate is the amount of the detected cloth (WC) and the amount of wet cloth (Wo). ) divided by

In this case, the reference moisture content (Rwf) is the average moisture content of clothes, and the reference dehydration rate (Rsf) is the average moisture content of clothes. The average clothing may be regarded as clothing corresponding to the strength of the course or option initially stored in the control unit P, and may mean a towel or the like.

A high moisture content means that clothing can hold a lot of water, and a moisture content higher than the reference moisture content means that it can hold water well or it is a thick cloth.

In addition, a high dehydration rate means that a lot of water is discharged from the clothes, and a dehydration rate below the standard dehydration rate means that the clothes do not drain water well or the cloth is of a rough material. The reference moisture content and the reference dehydration rate may be set as criteria for determining the fabric quality of the garment.

The laundry treatment apparatus of the present invention can sense the cloth quality of the clothes by using the information obtainable from the driving unit 9 in this way. The control unit (P) may vary the allowable unbalance value according to the foreskin. The allowable value may be the maximum unbalanced value that can enter the dehydration cycle. Therefore, the dehydration cycle can be started only when the clothes accommodated in the drum 4 are below the allowable value.

In general, when the degree of unbalance of the clothes accommodated in the drum exceeds an allowable value, the control unit P may attempt to evenly distribute the clothes by performing a cloth unwinding process. The unwinding process may include reversing the drum to resolve unbalance of the clothes, or watering the drum to eliminate kinking of the clothes.

However, when the garment is a fabric in which the fabric unwinding is not performed well, the unbalance may be difficult to resolve even if the fabric unwinding process is repeatedly performed. Even in this case, if the fabric unwinding process is repeatedly performed, a dehydration delay may occur or the dewatering process itself may not be completed.

Also, the garment may be a fabric that can be unwrapped very well, even if the garment does not exceed acceptable values. Even in this case, even if it is less than the permissible value, even if the cloth unwinding can be further performed, the dewatering operation can be directly entered without performing the cloth unwinding operation. In this case, unnecessary vibration or noise may occur during the spin-drying cycle due to the unbalance existing inside the drum.

Accordingly, the laundry treatment apparatus of the present invention may set a different allowable value for entering the dehydration cycle according to the fabric quality of the clothes. Specifically, when the clothes are made of a material that is difficult to unwind, the controller P may set the allowable value to be high to facilitate the entry into the dehydration cycle. Accordingly, it is possible to prevent the dewatering operation from being delayed by omitting the unnecessary cloth unwinding operation. However, even in this case, when the degree of unbalance of the clothes and the vibration of the drum reaches a limit value, the control unit p stops the spin-drying cycle and externally displays that the unwinding cycle or the spin-drying cycle cannot be performed. .

The control unit P may set the allowable value to be low when the clothes are made of a material that can be easily unwrapped. Therefore, even when the dewatering process is performed at high RPM, the vibration of the drum 4 can be lowered, noise can be reduced, and product life can be increased.

To this end, the control unit P senses the fabric of the clothes, and can classify the fabric into fabric 1, which is well unwrapped, fabric 2 with average fabric unwinding, fabric 3 for which fabric unwinding is poor, and the like, and a corresponding unbalance Allowable values can be set individually or correspond to previously stored allowable values.

6 is a diagram illustrating a control method for changing a dewatering entry condition according to the fabric quality of the clothes treatment apparatus according to the present invention.

When the laundry treatment apparatus of the present invention performs the dehydration cycle, the control unit (P) applies the drum to the inner wall of the drum only when the degree of unbalance or the unbalance value of the clothes accommodated in the drum is less than or equal to the allowable value. It can be rotated beyond the standard speed.

The control unit p may allow the dehydration operation to be performed only when the degree of unbalance is less than or equal to an allowable value, and when the degree of unbalance is greater than or equal to an allowable value, the control unit p may resolve the imbalance or stop the dehydration operation.

The dehydration cycle may be performed after a washing cycle for removing foreign substances from clothes and a rinsing cycle for separating foreign substances from clothes and detergent.

In the washing cycle and the rinsing cycle, in a state in which water is accommodated in the tub 3, a physical force is applied to the clothes while rotating the drum 4 forward or reverse, and draining the water from the tub 3 at least. It may correspond to repeating one or more times.

In addition, the dehydration cycle may correspond to rotating the speed of the drum at a higher speed than when the water is accommodated in the tub 3 when the water in the tub 3 is completely drained.

From this point of view, the laundry treatment apparatus of the present invention includes a water supply step (A1) of supplying water to the tub (3), a drum rotation step (A2) of rotating the drum to provide physical force to the clothes, and the tub ( The drainage step (A3) of draining the water of 3) may be performed. The above steps may correspond to at least one of a washing cycle and a rinsing cycle.

Meanwhile, after the washing or rinsing cycle is completed, a dehydration cycle for removing moisture from the clothes may be performed.

Specifically, the laundry treatment apparatus of the present invention may perform the preparation step (A5) of detecting the unbalanced value of the clothes by rotating the drum 4 . In the preparation step (A5), the unbalanced value of the clothing can be determined by comprehensively sensing current distribution when the drum is rotated, vibrations generated in the drum 4, and the like.

If the unbalance value is greater than or equal to the allowable value in the preparation step (A5), the controller (P) repeats the forward and reverse rotation of the drum to perform the unbalance step (A6) of resolving the unbalance of the clothing. can When the unwinding step (A6) is finished, the preparation step (A5) is performed again, so that it can be detected again whether the unbalanced value of the clothes is less than the allowable value.

If the unbalance value is greater than or equal to the allowable value in the preparation step (A5), the controller (P) may perform a high-speed rotation step (A7) of rotating the drum at the reference speed or more. The high-speed rotation step (A7) is a step in which the clothes are attached to the inner wall of the drum and moisture is removed in earnest by centrifugal force, which can be considered a full-scale dehydration step.

Meanwhile, the control unit P may further perform a limit setting step A4 of determining to change the allowable value by sensing the fabric of the clothes after the draining step B3.

In the limit setting step (A4), the cloth quality of the clothing is sensed, the rotation speed of the drum is changed, and the current of the driving unit 9 is measured in this process to sense the cloth quality of the clothing.

For example, in the limit setting step (A4), the speed of the drum is accelerated and then decelerated to detect the fabric of the clothes to measure the fabric of the clothes, and the acceleration/deceleration step (A41) shown in FIG. ) may be included. In other words, in the limit setting step (A4), the wet cloth amount of the clothing is sensed through acceleration and deceleration of the clothing, so that the cloth quality of the clothing can be determined by comparing it with the dry amount and determining the dehydration rate and moisture content.

When the cloth quality of the clothing is identified in the limit setting step A4, it may be determined whether to change the allowable value according to the cloth quality of the clothing.

Accordingly, in the laundry treatment apparatus of the present invention, even if the amount of clothes is the same, the number of times the unwinding step A6 is performed may be different depending on the fabric of the clothes.

Also, in the laundry treatment apparatus of the present invention, even if the amount of clothes and the unbalance value are the same, the number of times the unrolling step A6 is performed may vary depending on the fabric quality of the clothes.

When it is sensed that the cloth unwrapping of the clothing is easily performed in the limit setting step (A4), the laundry treatment apparatus of the present invention may lower the allowable value to induce more cloth unwinding.

In addition, when it is detected that the cloth unwinding of the clothing is difficult to be resolved in the limit setting step (A4), in the laundry treatment apparatus of the present invention, the allowable value is increased to omit the cloth unwinding step (A6) and immediately perform the high-speed rotation step (A7). ) can be induced.

7 shows a specific method of performing the limit setting step.

The laundry treatment apparatus of the present invention may perform an acceleration/deceleration step (A41) of accelerating and decelerating the drum when the limit setting step (A4) is performed.

When the acceleration/deceleration step A41 is performed, the laundry treatment apparatus of the present invention may perform the cloth quality determination step A43 of determining whether the cloth material is greater than or less than a reference value.

The reference value may be defined as a fabric whose unbalanced state can be resolved to a specific level when the fabric unwinding step (A6) is performed. For example, the reference value may be determined based on whether the unbalance value can fall below an allowable value in the cloth unwinding step (A6).

If the fabric quality of the drum detected in the fabric judging step (A43) is greater than or equal to the reference value at which the unbalanced state can be resolved to a specific level in the fabric unwinding step, the UB raising step (A44) of increasing the allowable value may be performed. . Accordingly, in the preparation step (A5), it is detected whether the unbalance of the clothes accommodated in the drum (4) is larger or smaller than the changed allowable value, and whether to perform the unwinding step (A6) is determined, so that the high-speed rotation step (A7) is faster can enter into

However, as described above, if the unbalanced value of the clothing is higher than the threshold value or the vibration generated in the high-speed rotation step A7 is greater than the threshold vibration, the cloth unwinding step A6 is immediately performed. can do.

On the other hand, if the drum thickness detected in the cloth quality determination step A43 is not greater than the reference value, a reference correspondence step A45 of detecting whether the cloth quality corresponds to the reference value may be performed. At this time, if the foreskin does not correspond to the reference value, it is determined that it is lower than the reference value and the UB raising step (A46) of increasing the allowable value may be performed. However, if the drum thickness detected in the reference correspondence step (A45) corresponds to the reference value, the allowable value may be maintained and the preparation step (A5) may be performed.

Of course, in the posterior determination step (A43), it is determined at once whether the porosity corresponds to the reference value, high or low, and either the UB rising step (A44) and the UB falling step (A45) or maintaining the allowable value can be determined. have.

The limit setting step A4 is performed before the preparation step A5 so that it can be quickly determined whether the fabric unwinding step A6 is recommended or suppressed.

Meanwhile, in the limit setting step (A4), when the acceleration/deceleration step (A41) is completed, a forward/reverse rotation step (A42) of rotating the drum forward and reverse may be performed. After changing the position of the clothes again through the forward/reverse rotation step (A42), the acceleration/deceleration step (A41) may be performed again. That is, the acceleration/deceleration step A1 and the forward/reverse rotation step A42 may be repeated at least twice or more.

The fabric fabric may be determined by comprehensively calculating the fabric fabric sensed in the plurality of acceleration/deceleration steps A41. Accordingly, it may be much easier to determine the fabric of the garment.

As a result, in the laundry treatment apparatus of the present invention, when the cloth quality of the clothing is equal to or greater than the reference value, the number of unwinding steps may be greater than when the cloth quality of the clothing is equal to or less than the reference value. In addition, when the cloth quality of the clothing is equal to or greater than the reference value, the high-speed rotation step may be entered more quickly than when the cloth quality of the clothing is equal to or less than the reference value. As a result, unnecessary repetition of the unnecessarily the annealing step (A6) is prevented, thereby saving both energy and time.

Also, in the laundry treatment apparatus of the present invention, when the cloth quality of the clothes is equal to or less than the reference value, the number of times of the unwinding step may be greater than when the cloth quality of the clothes is equal to or greater than the reference value. Accordingly, the cloth unwinding of the clothes may be further induced, and noise and vibration may be reduced.

For example, if the cloth of the detected cloth is softer than a towel made of cotton, the time for the unwinding step and the high-speed rotation step is longer than when the cloth of the detected cloth is harder than the towel made of cotton can decrease.

When the sensed cloth fabric is softer than the towel made of cotton, the number of times of performing the unwrapping step may be less than when the sensed cloth fabric is harder than the towel made of cotton.

If the sensed cloth fabric is softer than a towel made of cotton, the number of times of the unwrapping step may be less than when the towel corresponding to the weight of the garment is accommodated in the drum in the same arrangement as the garment.

The present invention may be modified and implemented in various forms, but the scope of the rights is not limited to the above-described embodiments. Therefore, if the modified embodiment includes the elements of the claims of the present invention, it should be regarded as belonging to the scope of the present invention.

1 Cabinet 11 Top Panel 3 Tub 4 Drum
9 Drive part 21 Water supply part 22 Drain part

Claims (13)

A tub for storing water; a drum rotatably provided inside the tub to accommodate clothes; a driving unit coupled to the tub to rotate the drum; In the control method of a clothes processing apparatus comprising: a control unit allowing the clothes to rotate at a speed higher than a reference speed at which the clothes adhere to the inner wall of the drum only when the unbalance value is less than or equal to an allowable value,
a water supply step of supplying water to the tub;
a drum rotating step of rotating the drum to provide a physical force to the clothes;
a draining step of draining the water from the tub;
a preparation step of rotating the drum to detect an unbalanced value of the clothes;
a cloth unbalancing step of resolving unbalance of the clothes by repeating forward and reverse rotation of the drum when the unbalance value is greater than or equal to the allowable value;
A high-speed rotation step of rotating the drum at a speed greater than or equal to the reference speed when the unbalance value is greater than or equal to the allowable value;
The method of claim 1, further comprising a limit setting step of detecting the cloth quality of the clothes after the draining step and determining to change the allowable value. According to claim 1,
The limit setting step is
The method of claim 1, wherein the speed of the drum is varied and the current of the driving unit is measured to sense the cloth quality of the clothes. 3. The method of claim 2,
In the limit setting step, the speed of the drum is accelerated and then decelerated to sense the fabric of the clothes. 3. The method of claim 2,
The limit setting step is
If the sensed drum tissue is greater than or equal to the reference value at which the unbalanced state can be resolved to a certain level in the fabric unwinding step, the allowable value is reduced,
and increasing the allowable value when the sensed drum quality is less than or equal to the reference value. 5. The method of claim 4,
The limit setting step is
and maintaining the allowable value when the sensed drum cloth quality corresponds to the reference value. 3. The method of claim 2,
The limit setting step is
The control method of the laundry treatment apparatus, characterized in that it is performed before the preparation step. 3. The method of claim 2,
The limit setting step is
an acceleration/deceleration step of accelerating and decelerating the drum and sensing the drum's fascia;
When the acceleration/deceleration step is completed, a forward/reverse rotation step of rotating the drum forward and reversely is performed,
and repeating the acceleration/deceleration step again to re-sensing the fabric of the drum. 8. The method of claim 7,
The method according to claim 1, wherein the cloth fabric is determined by calculating the cloth fabric detected in the plurality of acceleration/deceleration steps. 5. The method of claim 4,
The method according to claim 1, wherein when the cloth quality of the clothes is greater than or equal to the reference value, the number of times of the unrolling step is smaller than when the cloth quality of the clothes is equal to or less than the reference value. 5. The method of claim 4,
The method of claim 1, wherein when the cloth quality of the clothes is greater than or equal to the reference value, the high-speed rotation step is entered more quickly than when the cloth quality of the clothes is equal to or less than the reference value. According to claim 1,
If the cloth of the detected clothing is softer than a towel made of cotton,
The control method of the laundry treatment apparatus, characterized in that the time for performing the unrolling step and the high-speed rotation step is shorter than when the sensed cloth fabric is harder than a towel made of cotton. According to claim 1,
If the cloth of the detected clothing is softer than a towel made of cotton,
The method according to claim 1, wherein the number of times of performing the unrolling step is less than when the sensed cloth is harder than a towel made of cotton. According to claim 1,
If the cloth of the detected clothing is softer than a towel made of cotton,
The method according to claim 1, wherein the number of unwinding steps is less than when towels corresponding to the weight of the clothes are accommodated in the drum in the same arrangement as the clothes.

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