KR20210136697A - A control method of the laundry apparatus - Google Patents

Abstract

The present invention relates to a control method of a laundry treatment apparatus that can detect at least one of a dehydration rate and a drying time and change a dehydration time or speed in the currently performed dehydration cycle or change a dehydration time or speed in a dehydration cycle to be performed in the future. The control method of the laundry treatment apparatus according to the present invention includes a dehydration step for dehydrating laundry at a dehydration speed for a dehydration time, the dehydration speed and time stored in a control unit; a detection step for changing the rotation speed of a drum during the dehydration step to detect the dehydration rate of the laundry; and a determination step for changing at least one of the dehydration speed and time stored in the control unit.

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. 1 , in a conventional laundry treatment apparatus, when a washing cycle or a rinsing cycle is finished, the drum stops rotating and a 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.

In the conventional laundry treatment apparatus, the dehydration time for performing the dehydration step (S6) and the rpm of the third speed are stored in the control unit. Accordingly, there is a problem in that the dehydration time and the third speed are always maintained regardless of the amount or quality of the clothes.

For example, if the clothes are polyester fabrics that can be dehydrated well, the spin-drying time and the rpm are too excessive, so the spin-drying time is unnecessarily delayed or the fabric may be damaged, and if the clothes are difficult to perform spin-drying In the case of a cloth composed of

However, in the conventional laundry treatment apparatus, a course for performing the dehydration step is stored in the controller and cannot be changed, so there is a problem in that it is impossible to perform dehydration customized to the user's clothing condition.

In other words, the operation setting value fixed in advance through the experiment and verification process by the manufacturer of the clothing treatment equipment is suitable for the product distribution (equipment, motor, PCB, etc.) may not Accordingly, the user who actually uses the clothes treatment apparatus may feel dissatisfied with the dehydration ability of the clothes.

On the other hand, even when the set spin-drying time and rpm are performed due to an error of the laundry treatment apparatuses, the dehydration power may be insufficient or the dehydration power may be excessive. However, the conventional laundry treatment apparatus has a fundamental limitation in that it is not possible to adjust the spin-drying time and the rpm in consideration of this.

In addition, when the conventional laundry treatment apparatus also performs the drying cycle, there is a problem that the dehydration cycle is always performed at a constant intensity without considering the load when the drying cycle is performed. Accordingly, there was a problem in that the drying cycle was delayed due to the low dehydration of the clothes.

An object of the present invention is to provide a clothes treatment apparatus capable of controlling the spin-drying intensity by varying the spin-drying time or spin-drying rpm according to the fabric of the clothes during the spin-drying process.

An object of the present invention is to provide a laundry treatment apparatus capable of varying the spin-drying time and rpm by classifying and sensing clothes into a load through which water drains quickly, a load with slow water drain, and a medium load.

An object of the present invention is to provide a laundry treatment apparatus capable of optimally varying the spin-drying time or spin-drying rpm in consideration of the self-dispersion and characteristics of the laundry treatment apparatus.

In order to solve the above-described problem, the present invention can use the amount of dry cloth, the amount of wet cloth, and the current and speed information obtained during dehydration to classify the cloth. In this case, the laundry treatment apparatus of the present invention may classify the cloth by using deep learning.

The present invention divides the degree of water draining from the fabric into fabrics that drain well (ex, polyester), fabrics that do not drain well (ex, cotton fiber), and medium fabrics (ex, Mixed), etc. The time or rpm during which the high-speed dehydration is performed can be varied according to this.

The present invention may perform a process of optimizing and changing the dewatering conditions set in the laundry treatment apparatus. The laundry treatment apparatus of the present invention can store the result of the dehydration cycle in the control unit for each amount of laundry at the end of each dehydration cycle, and determine whether to change either the spin-drying time or the rpm compared to the target dehydration degree. can decide

According to the present invention, one of the spin-drying time or the rpm can be changed according to the installation environment by using information such as the determination value of the garment fabric, the spin-drying time, and the final degree of dehydration.

For example, in the laundry treatment apparatus of the present invention, if the final dewatering degree is less than or equal to the reference value, the set value may be changed in a direction to decrease the dewatering degree by increasing the dehydration time. In this case, even if the time is increased to satisfy the dehydration, the limit value may be set so as not to exceed the limit time in consideration of the lengthening of the total stroke time.

Conversely, in the laundry treatment apparatus of the present invention, when the final dewatering degree is greater than or equal to the reference value, the set value may be changed in a direction to reduce the spin-drying time and thus the stroke time. In this case, a limit value may be set so that a predetermined time cannot be reduced.

The laundry treatment apparatus of the present invention may utilize a method of varying the RPM when it is impossible to change the spin-drying time setting.

In the case where the laundry treatment apparatus of the present invention is a washing machine combined with drying, the set value may be changed by increasing the drying heating power in order to reduce the drying time.

However, the laundry treatment apparatus of the present invention uses a method of changing a set value of the dehydration cycle as a method that consumes relatively little energy.

For example, when the set dehydration time is operated and drying is completed, the set value can be changed by increasing the high-speed dehydration time if the required drying time exceeds the average standard verified during manufacturing.

The present invention has the effect of controlling the dehydration intensity by varying the dewatering time or dewatering rpm according to the fabric of the clothes during the dehydration process.

The present invention has the effect of being able to vary the spin-drying time and rpm by classifying and sensing clothes into a load through which water drains quickly, a load with slow water drain, and a medium load.

The present invention has the effect of being able to optimally vary the spin-drying time or spin-drying rpm in consideration of the self-dispersion or characteristics of the laundry treatment apparatus.

1 illustrates a dehydration process of a conventional laundry treatment apparatus.
2 is a view showing the basic structure of the laundry treatment apparatus of the present invention.
3 is a control block diagram of the laundry treatment apparatus of the present invention.
4 is a view showing the structure of the driving unit of the laundry treatment apparatus of the present invention.
5 is a diagram illustrating the principle of the laundry treatment apparatus of the present invention sensing cloth.
6 is a diagram illustrating a method in which the laundry treatment apparatus of the present invention senses cloth.
7 is a view showing an embodiment of a control method of the laundry treatment apparatus of the present invention.
8 is a diagram illustrating a control method of the laundry treatment apparatus according to the present invention.
9 shows a detailed control method of the laundry treatment apparatus of the present invention.
10 is a view showing an expanded embodiment of the control method of the laundry treatment apparatus of the present invention.
11 shows another control method of the laundry treatment apparatus of the present invention.
12 shows a detailed process of another control method 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.

In the Cartesian coordinate system shown in the drawing, the positive and negative directions of the x-axis are defined as the front and rear of the laundry treatment apparatus, respectively, and the positive and negative directions of the z-axis are defined as the upper and lower sides of the laundry treatment apparatus, respectively. decide to do In addition, the positive direction of the y-axis is defined as the right side of the laundry treatment apparatus, and the negative direction of the y-axis is defined as the left side of the laundry treatment apparatus.

Referring to FIG. 2( a ), the laundry treatment apparatus 1 of the present invention may include a cabinet 10 forming an exterior and a clothing receiving unit 20 ′ provided inside the cabinet 10 to accommodate clothes. have.

The cabinet 10 forms the exterior of the clothes treatment apparatus 1 and may include an opening 12 through which clothes can enter and exit and a door 13 for opening and closing the opening 12 . The door 13 is rotatably connected to the front side of the cabinet 10 , and the opening 12 may be opened and closed according to the rotation of the door 13 .

Meanwhile, FIG. 2 shows a front load type laundry treatment apparatus in which the opening 12 and the door 13 of the apparatus 1 of the present invention are formed on the front surface of the cabinet 10, but this is only one embodiment. (12) and the door (13) may be provided as a top-load type laundry treatment apparatus formed on the upper surface of the cabinet (10).

When the door 13 is coupled to the opening 12 , the door 13 may be locked so as not to arbitrarily open the opening 12 . The door 13 may lock the opening 12 by a solenoid, direct fastening means, or the like.

The front of the cabinet 10 contains a detergent box 14 that accommodates detergent or fabric softener and is detachably accommodated in the cabinet, and it is possible to input an operation command to the laundry treatment apparatus or to display the state of the laundry treatment apparatus. A control panel 16 may be provided.

The detergent box 14 and the control panel 16 may be disposed above the opening 12 so that the user can easily grip or contact them.

The detergent box 14 is provided to be withdrawn to the front, and can store a powdered detergent or a liquid detergent therein. For example, the detergent box may be a drawer type.

The control panel 16 may be provided on one side of the detergent box 14, and an input unit 18 for receiving an operation command including optional information related to a washing course and washing from a user, and the inputted information and washing information. It may include a display unit 17 for displaying the progress.

The input unit 18 may be a button type or a rotary knob type, and may be provided as a touch panel. The display unit 17 may include a display unit having a liquid crystal and a speaker emitting sound, but may be provided in any shape as long as it can display the state of the laundry treatment apparatus 1 , and the input unit 18 ) and may be provided integrally.

Meanwhile, the control panel 16 may be provided with a control unit P for controlling the laundry treatment apparatus 1 .

The controller may receive power from an external power source to control electrical components of the laundry treatment apparatus 1 to be described later. At this time, since the electrical components (hereinafter, the load unit) are connected in parallel to the control unit, each load unit (drive unit, water supply valve, communication module, etc.) can operate independently of each other.

The clothes accommodating part 20 ′ accommodated in the cabinet 10 may include a tub 20 for storing water and a drum 30 rotatably provided inside the tub 20 to accommodate clothes. can

The tub 20 is provided inside the cabinet 10 and may form a space in which washing water is stored. For example, the tub may have a cylindrical shape.

The drum 30 may be rotatably provided inside the tub 20 .

Meanwhile, a gasket may be further provided between the inlet 12 of the cabinet 10 and the tub inlet 21 of the tub 20 . The gasket may prevent the washing water inside the tub 20 from leaking into the cabinet 10 and prevent vibration generated from the tub 20 from being transmitted to the cabinet 10 . For example, the gasket may be formed of an elastic member.

Meanwhile, the laundry treatment apparatus 1 of the present invention includes a driving unit 9 coupled to the tub 20 to rotate the drum 30, a water supply unit 70 for supplying wash water into the tub 20, and It may include drainage parts 72 and 73 for discharging the wash water of the tub 20 to the outside.

The drain unit may include a drain pipe 73 communicating with the tub 20 and a drain pump 72 connected to the drain pipe to provide power for draining water to the tub 20 .

The water supply unit 70 may include a water supply pipe 171 for supplying water to the tub 20 and a water supply valve for opening and closing the water supply pipe 171 , and the water supply pipe 171 is the detergent box 14 . It may be provided to communicate with.

Accordingly, the detergent box 14 may be provided to communicate with the tub 20 to automatically supply detergent to the tub 20 when water is supplied.

The driving unit 9 is provided outside the tub 20 , and may be coupled to or through the rear surface of the tub 20 to be connected to the drum 30 . The driving unit 40 is fixed to the rear surface of the tub 20 and may convert electrical energy into mechanical energy. That is, the drum 30 can be rotated by receiving a current from the outside.

The driving unit 9 includes a stator generating a magnetic field, a rotor rotating by the magnetic field inside the stator, and a rotating shaft passing through the rear surface of the tub 20 to connect the drum 30 and the rotor. can

The driving unit may be a brush-less direct current (BLDC) motor. In this case, the stator may consist of a coil and the rotor may be a permanent magnet.

On the other hand, the laundry treatment apparatus of the present invention may be provided for both drying. In this case, the laundry treatment apparatus of the present invention may further include a hot air supply unit 60 for supplying hot air to the inside of the drum 30 .

The hot air supply unit 60 communicates with the drum and includes a discharge duct 61 for discharging the air inside the drum, a heating unit 63 for heating the air discharged from the discharge duct 61, and the heating unit An inlet duct 64 for introducing the air heated in (63) back into the drum, a condensation pipe for condensing the air discharged from the outlet duct 61 to remove moisture, and the air inside the drum to the outlet duct ( 61) and may include a blower fan 62 providing power to be supplied to the heating unit 63 and the inlet duct 64.

On the other hand, the drum 40 or the discharge duct 61 may include a drying sensor for determining the degree of drying of the clothes.

3 shows the configuration of a control unit for controlling a load according to the present invention.

Referring to FIG. 3A , the control unit P may be provided on a control panel or the like to receive a command to operate the laundry treatment apparatus through the input unit 18 to perform a washing course and options.

In particular, the laundry treatment apparatus of the present invention may include a position detection unit 255 for detecting the position of the driving unit 9 and a current detection unit 225 for sensing current applied or output from the driving unit 9, and the tub ( 20) It may further include a vibration sensor 92 for detecting internal vibration.

The controller P may control the position detecting unit 225 or the current detecting unit 225 to receive information on the state of clothes from the driving unit 9 . The state of the clothes may include the fabric quality, weight, dehydration, and dryness of the clothes.

The control unit P may perform at least one of a washing cycle, a rinsing cycle, and a dehydration cycle while performing the washing course and options stored in the storage unit P2. For example, in the storage unit P2, a dehydration time and a dehydration RPM for performing a dehydration cycle may be set.

Also, the control unit P may provide the current state of the laundry treatment apparatus through the display unit 17 .

On the other hand, the control unit P receives various signals such as the signal value of the vibration sensor 92, the current value applied to the driving unit 9, and the RPM of the drum 30, and calculates them at once to detect the state of the clothes. It may include a parallel arithmetic unit (P1) that can.

In addition, the control unit (P) stores the data value processed by the parallel processing unit in the storage unit (P2), or stores an algorithm capable of operating the parallel processing unit (p1), or the parallel processing unit ( Various electrical signals input to p1) can be stored.

Meanwhile, the controller P of the present invention may implement an artificial neural network learning logic for generating an artificial neural network with the parallel computing device P1 and the storage unit P2. The artificial neural network may be used to derive one consistent result by combining and analyzing a plurality of factors.

The conventional control unit has a problem in that it has no choice but to derive one output value from one input value. However, since the laundry treatment apparatus of the present invention can utilize two or more signals through the parallel computing device P1, necessary information can be obtained more accurately than when using one piece of information.

4 illustrates a structure in which the control unit P of the laundry treatment apparatus according to the present invention controls the driving unit 9 with a current and receives information through the current.

Referring to FIG. 4( 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 30 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 18 . The input unit 18 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. In addition, the control unit P may control to display the washing course, washing time, spin-drying time, rinsing time, or the like, or a current operation state, through the display unit 17 .

The control unit P may control the driving unit 9 to not only rotate the drum 30 but also to change the rotational speed of the drum 30 . 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 P, and the control unit 9 appropriately adjusts 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. 4B , 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 sense the amount of eccentricity of the drum 30 , that is, the unbalance (UB) of the drum 30 . 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 30 .

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.

FIG. 4( 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 제어기The 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 setpoint (ω*r), the PI controller

PI control is performed at 535, and a current setpoint iq may be generated. 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.

5 is a diagram illustrating a method in which the control unit P can sense the state of clothes by the current applied or output to the driving unit 9 .

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.

By sensing the moisture content and the dehydration rate, it is possible to sense the cloth quality of the clothes.

For example, the control unit P of the laundry treatment apparatus of the present invention divides the clothes into cloth 1, which drains water very well, cloth 2 that does not drain easily, and cloth 3 with an average level, according to the moisture content and dehydration rate. The corresponding dehydration strength can be determined.

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 the parallel association device P1, processes the input current value with an artificial neural network, and then mixes and processes them. Through a decision neural network that can

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 acquired by the storage unit P2 or the parallel association device P1 contains information about the representative values tested in advance according to the weight of the load and the control RPM, the measurement data generated inside the washing machine In case of inverse calculation with an artificial neural network, it is possible to accurately inversely calculate the type and weight of clothing.

6 is a diagram illustrating an embodiment of sensing the amount of laundry of clothes.

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 sensing step (A3) 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.

To this end, the control unit P includes an acceleration and variable step A31 of accelerating the drum 30, a decelerating variable step A32 of decelerating the drum 30, and the driving unit 9 during the acceleration step. A laundry weight sensing step (A33) of detecting the amount of laundry contained in the drum may be performed through the acceleration measurement value of , and the deceleration measurement value of the driving unit during the deceleration step.

An intermediate step (A34) of stopping the current supply for accelerating the drum may be further set between the acceleration/variable step (A31) and the deceleration/variable step (A32).

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 is cut off in the deceleration and variable step A32 to decelerate the driving unit 9 using a power generation braking method or the like. Accordingly, the algorithm for controlling the deceleration and variable step A32 can be omitted, and energy for the deceleration and variable step A32 can be saved.

Furthermore, since the power is cut off in the deceleration and variable step (A32), 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 acceleration measurement value further includes the speed change amount of the acceleration variable step A31, and the deceleration measurement value further includes the speed change amount of the deceleration variable step A32. have.

The speed change amount of the acceleration variable step (A31) and the speed change amount of the deceleration variable step (A32) are only necessary to obtain the difference between the inertia of the acceleration variable step (A31) and the inertia of the deceleration variable step (A32). It may not be necessary to measure the voltage value of , and furthermore, 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, it is preferable that the acceleration variable step (A31) and the deceleration variable step (A32) share the same speed band.

Meanwhile, in the control method of the laundry treatment apparatus of the present invention, the amount of laundry is sensed using the current command value or the current value measured by the driving unit 9 by performing the acceleration varying step A31 and the decelerating varying step A32 .

In this case, since the above formula uses a current value, the deceleration and variable step A32 is first performed, and the current value is measured by performing the acceleration variable step A31 to detect the amount of laundry through the same formula.

On the other hand, in the sensing step (A), the current applied to the driving unit 9 is maintained or the current supply is stopped in order to set a reference value capable of performing the acceleration/variable step (A31) and the deceleration/variable step (A32). A preparation 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 variable acceleration step (A31) may further accelerate from the rpm of the drum rotating in the standby step to a determined speed, and the deceleration/variable step (A32) may decelerate the drum from the determination speed. That is, the acceleration variable step A31 and the deceleration variable step A32 may be continuously performed. The deceleration/variable step (A32) is performed by lowering the current command value directed to the driving unit (9) in the acceleration/variable step (A31) or blocking the voltage applied to the driving unit (9), so that the control unit (P) or the circuit No risk of burnout

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.

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 standard moisture content means that it is a fabric that can hold water well.

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 are fabrics that do not drain water well. The reference moisture content and the reference dehydration rate may be set as criteria for determining the fabric quality of the garment.

Hereinafter, the laundry treatment apparatus of the present invention optimizes at least one of the dewatering speed and the dewatering time set to perform the dehydration cycle using at least one of the dehydration amount and the cloth of the clothes detected by the control unit (P). A control method will be described.

The reason that the control method of the laundry treatment apparatus of the present invention is applied to the dehydration cycle is to avoid overlapping descriptions, and the same control method may be applied to the washing cycle, the rinsing cycle, and the drying cycle.

7 is a diagram illustrating a control method in which the laundry treatment apparatus according to the present invention can optimize the dehydration intensity by detecting the fabric and dehydration of the clothes.

In the control unit P, the dehydration speed and dehydration time for performing the dehydration cycle may be preset or stored in the storage unit P2. The spin-drying speed and the spin-drying time may be default values set at the time of manufacture regardless of the characteristics of the laundry treatment apparatus in which the control unit P is installed.

First, the laundry treatment apparatus of the present invention may detect whether the dehydration cycle is successfully performed by detecting the degree of dehydration in the process of performing the dehydration cycle. For example, the controller P may detect whether the dehydration degree is higher or lower than the expected dehydration degree. Accordingly, the control unit P can determine whether to change at least one of the dehydration time and the dehydration speed in the currently ongoing dehydration cycle.

In the laundry treatment apparatus of the present invention, the dehydration step (A2) of using the drum to remove moisture from the clothes during the spin-drying time and the spin-drying time, and changing the rotation speed of the drum during the dehydration step to control the dehydration degree of the clothes It may include a sensing step (A3) of detecting, and a determining step (A4) of changing at least one of the dehydration speed and the dehydration time stored in the control unit according to the sensed dehydration degree.

The sensing step (A3) may be performed at least once or more while the dehydration step is performed. In the sensing step (A3), the detected dehydration may be transmitted to the control unit P, and the control unit P may store the sensed dehydration in the storage unit P2.

The storage unit P2 of the control unit P may store expected dehydration values for each dehydration time. The storage unit P2 may store an estimated dehydration degree when the dehydration process is performed at the point in time when the sensing step A3 is performed.

The determining step (A4) is a step of comparing the dehydration degree detected in the sensing step (A3) with the expected dehydration degree stored in the storage unit (P2) during the dehydration time. When the sensed dehydration degree is different from the expected dehydration degree in the determining step (A4), the controller P may determine whether to change at least one of the dehydration rate and the dehydration time.

The control unit (P) may change at least one of a dehydration speed and a dehydration time to be performed in the dehydration cycle in which the sensing step (A3) is performed.

For example, when the estimated dehydration degree measured in the sensing step A3 is lower than the actual dehydration degree, it may be determined that the dehydration effect is weak even after the actual dehydration cycle is completed. Accordingly, the control unit P may increase at least one of the dehydration speed and the dehydration time when the actual dewatering operation is performed in earnest.

For example, if the expected dehydration level measured in the sensing step (A3) is higher than the actual dehydration level, it may be determined that there is a risk of further dehydration even though dehydration has been performed up to a target value and that the fabric may be damaged.

Accordingly, the control unit P may reduce at least one of the dehydration speed and the dehydration time when the actual dewatering operation is performed in earnest.

Accordingly, the laundry treatment apparatus of the present invention can determine the actual dehydration degree of the clothes in real time when performing the dehydration operation, and change at least one of the dehydration time and the dehydration speed so that the intended dehydration effect can be derived. .

On the other hand, the control unit P compares the expected dehydration and the actual dehydration to determine the set dehydration performance of the currently operated laundry treatment apparatus, thereby adjusting the set value itself so that the dehydration performance of the current laundry treatment apparatus can be optimized. .

Based on the data comparing the expected dehydration and the actual dehydration, the control unit (P) not only varies the dehydration time or the dehydration rate in the current dehydration cycle, but also determines the dehydration time or the dehydration rate in the dehydration cycle to be performed in the future. You can change the default setting itself.

The controller P may change the set values of the spin-drying speed and the spin-drying time, which are actually initially stored, in accordance with the conditions of the actually operated laundry treatment apparatus. Accordingly, if the dehydration intensity set in the laundry treatment apparatus is too strong, the controller P may reduce the dehydration rate or decrease the dehydration time to prevent damage to clothes and waste of energy in advance.

Also, when the dehydration intensity set in the laundry treatment apparatus is too strong, the control unit P may increase the dehydration rate or increase the dehydration time to ensure dehydration reliability.

On the other hand, the clothes treatment apparatus of the present invention determines the fabric itself before starting the dehydration process, and determines whether the clothes currently accommodated in the drum are made of a material having an excellent dehydration effect or a material having a weak dehydration effect ( A1) can be further performed.

The control unit P may determine the material of the clothing by comparing the amount of dry cloth and the amount of wet cloth of the clothing or by comparing the dehydration rate and moisture content of the clothing over time.

For example, the control unit P determines whether the average material of the currently accommodated clothing is close to a material from which water can be removed even if a little dehydration is performed, such as a polyester series, or whether a significant amount of dehydration is performed such as a cotton series. Whether or not water is close to a material that is difficult to remove can be identified in the condition determination step (A1).

When the control unit P determines the degree of dehydration difficulty by grasping the material of the clothes in the condition determination step A1, at least one of the dehydration time and the dehydration speed to be performed in the actual dehydration cycle may be adjusted in advance.

In other words, after detecting the material of the clothing in the condition determining step A1 , the controller P may pre-adjust at least one of the material of the clothing and an appropriate spin-drying speed and spin-drying time.

For example, if the control unit P determines that the material of the clothes is an average material of the clothes, the dehydration step A2 may be entered as it is with the set spin-drying speed and spin-drying time. However, if the control unit P determines that the material of the clothing is a material having a lower dehydration rate than the average clothing, the control unit P may increase at least one of the set dehydration rate and dewatering time to enter the dehydration step (A2).

In addition, if the control unit P determines that the material of the clothing is a material having a higher dehydration rate than the average clothing, the control unit P may decrease at least one of the set dehydration rate and dewatering time to enter the dehydration step (A2).

As described above, the laundry treatment apparatus of the present invention can vary the spin-drying speed and the spin-drying time according to the material of the clothes, even if the amount of clothes is the same.

On the other hand, when performing the dehydration step (A2), the dehydration rate and the dehydration time adjusted through the sensing step (A3) may be adjusted again in the determining step (A4) according to the progressed dehydration degree.

Accordingly, the laundry treatment apparatus of the present invention can set the dehydration speed and the dehydration time differently depending on the fabric of the clothes, and can change the set dehydration speed and dehydration time to optimize the dehydration rate and dehydration time by detecting the dehydration degree in progress. It is also possible to perform optimization according to the condition of the laundry treatment apparatus by changing the and spin-drying time.

On the other hand, in the laundry treatment apparatus of the present invention, when the spin-drying speed and the spin-drying time are varied in the determining step (A4), the spin-drying time is preferentially changed, and the spin-drying speed is set to be changed only when the spin-drying time is not compensated. can

This is because the spin-drying speed is a factor that is very close to the vibration and resonance frequency of the drum, and it is relatively difficult to ensure stability by varying the spin-drying speed.

On the other hand, in the case of varying the spin-drying time, the maximum time for preventing the dehydration delay and the minimum time for exhibiting the de-watering performance can be set. That is, the change of the dehydration time can be changed only between the maximum time and the minimum time. For example, the maximum time may be set to 1 hour, and the minimum time may be set to 15 minutes.

8 is a concrete view of the control method of the present invention mentioned in FIG.

Referring to Fig. 8(a), the dewatering step (A2) of the present invention includes a laundry weight sensing step (A21) for detecting the amount of laundry, and an acceleration step (A22) for accelerating the drum speed to the dewatering speed as in the conventional laundry treatment apparatus. , it may include a high-speed step (A23) of maintaining the dehydration speed by the dehydration time.

In the step of detecting the amount of laundry (A21), the step of determining the condition (A1) may be performed together. For example, not only the amount of compresses of the clothes but also the quality of the cloths may be determined.

The dehydration speed and dehydration time in the high-speed step (A23) may be the dehydration speed and dehydration time stored in the storage unit (P), and may be the dehydration step and the dehydration time adjusted in the condition determination step (A1).

Referring to FIG. 8(b), the control method shown in FIG. 6 may be applied as it is in the sensing step A3 of the present invention. By performing the acceleration variable step A31 and the deceleration variable step A32, the amount of laundry is sensed through the calculation of the current value, and the control unit P may calculate the dehydration degree by comparing it with the amount of wet cloth.

When the laundry weight and dehydration are sensed in the step of detecting the laundry amount, a storage step (A33) of storing the weight in the control unit may be performed together.

Referring to FIG. 8( c ), the determining step (A4) of the present invention is a step of comparing the dehydration degree detected in the detecting step (A3) with a reference value that is an expected dehydration degree.

If the detecting step (A3) is performed N times, the determining step (A4) includes a first comparison step (A41) of comparing whether the average dehydration of N times is equal to or greater than a reference value, and determining whether the average dehydration of N times is less than or equal to a reference value. A second comparison step (A42) of comparing may be performed.

In the first comparison step (A41), if the average dehydration rate is greater than or equal to the reference value, a dehydration weakening step (A43) of reducing the dehydration time or dehydration rate is performed. A strengthening step (A44) may be performed.

However, in the determining step (A4), if the average dehydration degree of No. N corresponds to the reference value or there is only a small difference, the dehydration rate and dehydration time may be terminated without changing.

At this time, the determination of the average dehydration in the determining step (A4) means that even if the dehydration is high or low only in a specific situation, if the dehydration is the same as the reference value in the overall situation, there is no need to unreasonably change the dehydration rate and dehydration time. will be considered

On the other hand, the N times detection step (A3) may not mean only when performing one dehydration cycle. Varying either the spin-drying time or the spin-drying speed has a lasting effect on the subsequent spin-drying of clothes. Therefore, the dehydration degree and the reference value sensed in a plurality of spin-drying cycles are identified, and in the determining step (A4), the spin rate or spin-drying process is performed. You can decide the time.

Accordingly, in the determining step (A4), when the detected dehydration and the expected dehydration correspond, or the dehydration is detected less than the reference number, or the average value of the dehydration sensed more than the reference number corresponds to the expected dehydration The dehydration speed and the dehydration time stored in the control unit may be maintained as they are.

9 shows an embodiment in which the dehydration time is varied according to the matters determined in the condition determination step (A1).

The laundry treatment apparatus of the present invention may sense the cloth quality of the clothes in the condition determination step (A1). The laundry treatment apparatus of the present invention may determine the corresponding spin-drying time and spin-drying speed according to the sensed cloth quality, respectively.

In addition, the laundry treatment apparatus of the present invention may classify the sensed cloth for each step to determine a spin-drying time or a spin-drying speed corresponding to each step, respectively.

The control unit P may be provided to store a plurality of dehydration rates or dehydration times corresponding to the fabric of the clothes. In the condition determining step (A1), it is possible to determine the dehydration speed or dehydration time to be performed in the dehydration step (A2) corresponding thereto by detecting the fabric of the clothes.

In the condition determination step (A1), the fabric quality of the clothes may be measured while performing a washing cycle or a rinsing cycle as well as a dehydration cycle. That is, the condition determining step (A1) may determine the fabric quality of the garment by measuring a current applied or measured to the driving unit in the process of accelerating or decelerating the drum twice or more.

For example, the laundry treatment apparatus of the present invention uses the sensed cloth for cloth, such as towels and polyester, which drains water well, CLASS1, which drains water well like average clothing, and CLASS2, which drains water moderately like average clothes, and does not drain well like cotton. It can be classified into CLASS3, which is a non-existent material.

Through this, the control unit can set the spin-drying time or the spin-drying step to be performed in the high-speed step A23 differently for each material. For example, the spin-drying time may be set differently to T1, T2, and T3 in the order of the above-described clothes material.

As a result, the dewatering operation may be performed on a material that does not drain easily with a high dewatering strength, and a dewatering operation may be performed on a material that easily drains water with a low dewatering strength.

Meanwhile, the sensing step A3 may be performed in the acceleration step A22.

The sensing step (A3) may be performed whenever the drum is accelerated in the acceleration step (A22). In the accelerating step (A22), since the drum is continuously rotating at a speed at which moisture can be removed from the clothes, when the detecting step (A3) is performed in the accelerating step (A22), it is possible to easily determine the dehydration in real time have.

The detecting step (A3) may include at least one measurement section for maintaining the rotational speed of the drum in the acceleration step (A22), and accelerating and decelerating the drum in the measuring section to dehydrate the clothes can detect

First, in the acceleration step, if the drum is accelerated at a first detection speed higher than the laundry speed, the drum rotates at a constant speed to perform the detection step (A3). The drum rotates at a constant speed and the sensing step (A3) may be performed. If the drum is further accelerated at a third sensing speed higher than the second sensing speed, the drum rotates at a constant speed for a predetermined time and the sensing step (A3) may be performed.

10 shows an aspect in which the determination step A4 is performed through the dehydration sensed in the detection step A3.

In the determining step (A4), the dehydration time determined in the condition determining step can be adjusted by calculating the dehydration degree measured in the detecting step (A3) and comparing it with a reference value.

For example, if the dehydration time is determined because the cloth quality of the clothing is determined to be a specific cloth material class X, the dehydration time may be extended or decreased by comparing the dehydration degree determined in the sensing step and the reference value in the determining step (A4).

On the other hand, before finally adjusting the dehydration in the determining step (A4), the detection step (A3) may be further performed in the high speed step (A23) to detect the final dehydration.

When the final dehydration degree is lower than the reference value, in the determining step (A4), the control unit P may increase the dehydration time, and if it is higher than the reference value, the dehydration time may decrease.

Meanwhile, as described above, not only the dehydration time but also the dehydration rate may be varied.

11 is a diagram illustrating a control method when the laundry treatment apparatus of the present invention is provided for both drying.

Even when the laundry treatment apparatus of the present invention performs the drying cycle, the above-described condition determining step and dewatering step may be performed in the same manner.

That is, the laundry treatment apparatus of the present invention may set a suitable dehydration time or dehydration rate in the dehydration step (B2) in the condition determination step (B1), and the dehydration step (B2) may be performed at the set dehydration time or dehydration rate. .

When the dehydration step (B2) is completed, a drying step (B3) of completely removing moisture from the clothes may be performed. The drying step B3 may be set to end when the drying level of the clothes reaches a set value.

That is, the drying step (B3), unlike the dehydration step (B2), may be set to end when the drying of the clothes is completed, rather than having a predetermined dehydration time. The degree of drying of clothes may be directly grasped through the drying sensor, or the degree of increase in the temperature discharged to the discharge duct 61 through the temperature sensor may be grasped indirectly. For example, when the temperature of the air discharged to the discharge duct 61 rises suddenly, it can be understood that the clothes cannot take any more heat as vaporization heat because there is no moisture in the clothes, so that it can be determined that drying is complete.

An additional determination step (B4) of determining whether to change the set value of the dehydration time or dehydration rate to be performed in the dehydration step (B2) may be performed through the drying time measured in the drying step (B3).

12 shows the additional determination step (B4).

An expected drying time may be stored in the control unit p.

Referring to FIG. 12( a ), in the additional determination step (B4), at least one of the dehydration rate or the dehydration time stored in the control unit by comparing the drying time actually performed in the drying step (B3) with the expected drying time. You can change either one.

The additional determination step (B4) may include a primary comparison step (B41) of comparing whether the drying time and the reference time are large, and a secondary comparison step (B42) of comparing whether the drying time is shorter than the reference time. have.

If it is determined that the drying time is longer than the expected reference time in the first comparison step (B41), the dehydration strengthening step (A44) of increasing the dehydration rate and the dehydration time may be performed.

If it is determined that the drying time is shorter than the expected reference time in the secondary comparison step (B42), a dehydration weakening step (A43) of reducing the dehydration rate and the dehydration time may be performed.

On the other hand, if there is no difference between the drying time and the reference time, the spin-drying speed or the spin-drying time may be finished without changing.

Of course, in the laundry treatment apparatus of the present invention, when the drying time is increased, it is possible to increase the energy input to the heating unit. However, if the energy input to the heating unit is increased, not only the energy consumption is increased, but also safety cannot be guaranteed, and there is a possibility that clothes may be damaged. Therefore, if it is determined that the drying time is longer than the expected drying time, a method of increasing the dehydration strength and reducing the moisture itself in the clothes input to the drying cycle may be taken.

If it is determined that the drying time is longer than the expected drying time, the control unit p determines that sufficient dehydration of the clothes cannot be performed at the dehydration speed and the dehydration speed set in the laundry treatment apparatus, and either the set dehydration time or the dehydration speed You can change it to increment one. At this time, a method of further increasing the dehydration time is taken, and the dehydration rate can be increased when the dehydration time can no longer be increased.

12 (b), the additional determination step (B4) increases the dehydration speed or the dehydration time stored in the control unit only when the drying time is longer than the expected drying time in the first comparison step (B41). can

However, when the drying time is equal to or smaller than the expected drying time, the dehydration speed or the dehydration time stored in the control unit may be maintained as it is. This is because the fact that the drying time is equal to or smaller than the expected drying time means that the dehydration strength is sufficient, and thus the drying time is naturally reduced, thereby reducing the operating time of the overall laundry treatment apparatus.

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 Clothes processing equipment
10 cabinet
20 tubs
30 drums
70 water supply
72 drain pump
P control

Claims (16)

A tub for storing water, a drum rotatably provided inside the tub for accommodating clothes, a driving unit coupled to the tub to rotate the drum, and a dehydration speed and dehydration time for performing a dehydration cycle are stored. A method of controlling a laundry treatment apparatus including a control unit, the method comprising:
a dehydration step of using the drum to remove moisture from the clothes during the dehydration rate and the dehydration time;
a sensing step of detecting the degree of dehydration of the clothes by varying the rotational speed of the drum during the dehydration step;
and a determining step of changing at least one of the dehydration speed and the dehydration time stored in the control unit according to the sensed dehydration degree. According to claim 1,
The control unit is provided by storing the expected dehydration number for each dehydration time,
The decision step is
Comparing the sensed degree of dehydration and the expected dehydration during the dehydration time, and changing at least one of the dehydration rate and the dehydration time when the sensed dehydration degree and the expected dehydration are different How to control the device. 3. The method of claim 2,
Further comprising a storage step of storing the sensed dehydration in the control unit,
The decision step is
and changing at least one of the spin-drying speed and the spin-drying time stored in the control unit when the average value of the dehydration sensed more than a reference number of times is different from the expected dehydration. 4. The method of claim 3,
The decision step is
If the sensed dehydration and expected dehydration correspond, or the dehydration is detected less than the reference number, or the average value of the dehydration sensed more than the reference number corresponds to the expected dehydration, the dehydration rate stored in the control unit and The control method of the laundry treatment apparatus, characterized in that maintaining the spin-drying time. 3. The method of claim 2,
The decision step is
and decreasing the dehydration time when the sensed dehydration degree is greater than the expected dehydration degree. 3. The method of claim 2,
The decision step is
and increasing the spin-drying time when the sensed dehydration degree is less than the expected dehydration degree. 3. The method of claim 2,
The decision step is
and decreasing the dehydration rate when the sensed dehydration degree is greater than the expected dehydration degree. 3. The method of claim 2,
The decision step is
and increasing the dehydration rate when the sensed dehydration degree is less than the expected dehydration degree. According to claim 1,
The dehydration step
an accelerating step of accelerating the rotational speed of the drum to a spin-drying speed;
A high-speed step of maintaining the drum at a dewatering speed,
The detection step is
and detecting the dehydration of the clothes by varying the speed of the drum in the accelerating step. 10. The method of claim 9,
The detection step is
At least one measurement section for maintaining the rotational speed of the drum in the acceleration step,
and detecting the dehydration degree of the clothes by accelerating and decelerating the drum in the measurement section. 11. The method of claim 10,
The detecting step may include accelerating and decelerating the drum before the drum is decelerated at the dehydration speed to detect the dehydration degree of the clothes. According to claim 1,
The control unit is provided to store a plurality of dehydration rates or dehydration times corresponding to the fabric of the clothes,
The method of claim 1, further comprising: a condition determining step of detecting the fabric of the clothes and determining a dehydration speed or a dehydration time to be performed in the dewatering step corresponding thereto. 13. The method of claim 12,
The condition determination step is
and determining the fabric quality of the clothes by measuring a current applied or measured to the driving unit in the process of accelerating or decelerating the drum twice or more. According to claim 1,
A heat supply unit for drying clothes by supplying hot air to the drum, and a drying sensor for detecting the degree of drying of the clothes,
a drying step of drying the clothes by driving the heat supply unit when the dehydration step is completed;
The drying step is terminated when the drying level of the clothes reaches a set value. 15. The method of claim 14,
The control unit is provided to store the expected expected drying time,
The decision step is
and determining to change at least one of the dehydration rate and the dehydration time stored in the control unit by comparing the drying time performed in the drying step with the expected drying time. 16. The method of claim 15,
The decision step is
Increase the dehydration rate or the dehydration time stored in the control unit only when the performed drying time and the expected drying time are longer,
and maintaining the dehydration rate or dehydration time stored in the control unit when the performed drying time is equal to or smaller than the expected drying time.

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