KR20190080069A - Method for controlling laundry treating apparatus - Google Patents

Abstract

The present invention relates to a method for controlling a laundry treatment apparatus which includes a first washing tub rotated around a vertical shaft and a second washing tub detachably coupled to the first washing tub wherein the first and second washing tubs are integrally rotated by a driving unit rotating the first washing tub. According to the present invention, the method for controlling a laundry treatment apparatus comprises: a step (a) of selecting one of ordinary washing and simultaneous washing; a step (b) of rotating the driving unit and detecting a characteristic value varied in accordance with a load applied to the driving unit; a step (c) of determining a laundry amount based on the characteristic value detected in the step (b) when the ordinary washing is selected in the step (a), and determining the laundry amount based on a value subtracting a preset correction value from the detected characteristic value when the simultaneous washing is selected in the step (a); and a step (d) of setting a water supply level in accordance with a preset reference based on the laundry amount determined in the step (c), and supplying water in the first washing tub up to the set water supply level. When the first and second washing tubes are operated at the same time while the first washing tub is empty and the second washing tub is filled with laundry, the present invention can prevent water from being unnecessarily supplied into the first washing tube.

Description

[0001] METHOD FOR CONTROLLING LAUNDRY TREATING APPARATUS [0002]

The present invention relates to a control method of a laundry processing apparatus having a second washing tub detachably installed in a first washing tub.

The laundry processing apparatus is a device that processes laundry through various operations such as washing, dehydrating and / or drying. The laundry processing apparatus is a washing machine for removing contaminants from laundry (hereinafter, also referred to as "cloth") using water and detergent, a drum for wet laundry being rotated at a high speed, a dehydrator for dehydrating the laundry, A dryer for drying the laundry by supplying dry air into the loaded drum, and a drying and washing machine having a drying function and a washing function.

Recently, a washing machine provided with two washing tanks is provided. Such a washing machine has a large-capacity washing tank and a small-capacity washing tank, and each washing tank is separated from each other. Such a washing machine is convenient because each washing machine can be used at the same time or at the same time according to the user's needs. Further, if a small washing amount is required, only a small capacity washing machine can be used, which is very economical. However, in such a conventional washing machine, since the two washing tanks are separated from each other, the overall size of the product can not be increased due to the spaces accommodating the washing tanks, and the driving units for driving the washing tanks, Because of the need for utensils and two drainage devices for drainage, the price of the product also rose.

The present invention provides a control method for a laundry processing apparatus having a first washing tub and a second washing tub detachably installed on an upper portion of the first washing tub and rotated integrally with the first washing tub And more particularly to a control method capable of accurately detecting the amount of laundry (hereinafter, referred to as "packed amount") charged into the first washing tank while the second washing tank is installed.

In addition, even if the standard of the predetermined water supply level is applied to the simultaneous washing performed in a state in which the second washing tub is installed as well as the general laundry performed in the state that the second tub is detached, And to provide a control method for a laundry processing apparatus in which a proper amount of water can be supplied.

The present invention provides a washing machine comprising a first washing tub rotated around a vertical axis and a second washing tub detachably coupled to the first washing tub, The present invention relates to a control method for a laundry processing apparatus in which two washing tanks are integrally rotated.

The control method includes the steps of: (a) selecting one of normal washing and simultaneous washing; detecting a characteristic value (driving unit output current / electromotive force) varying according to a load applied to the driving unit by rotating the driving unit (b), when the general laundry is selected in the step (a), the amount of laundry is determined on the basis of the characteristic value detected in the step (b), and when the simultaneous washing is selected in the step (b) (C) determining a volume of the water based on a value obtained by subtracting a predetermined correction value from the sensed characteristic value, and setting a water level according to a preset reference based on the volume determined in the step (c) (D) supplying water into the first washing tank up to a water supply level.

The control method of the laundry processing apparatus of the present invention is a method of controlling the laundry processing apparatus according to the present invention which excludes the influence of the load acting on the driving unit from the second washing tank even in the case of simultaneous washing performed in a state in which the second washing tub is installed in the first washing tub, It is possible to accurately detect the amount of the laundry contained in the washing tub.

In addition, it is possible to apply the standard of the predetermined water level according to the amount of the laundry to the simultaneous washing performed in a state in which the second washing tub is installed as well as the normal laundry performed in the state that the second washing tub is detached, In this case, when the first washing tub is supplied with water, an appropriate amount of water corresponding to the laundry loaded into the first washing tub can be supplied.

In addition, when the first washing tank is empty, and the simultaneous washing is performed in a state where the laundry is supplied to the second washing tank, unnecessary water supply to the first washing tub can be prevented.

1 is a side cross-sectional view of a laundry processing apparatus according to an embodiment of the present invention.
2 is a perspective view of the second washing tub.
3 shows a state in which the second washing tub is disassembled.
FIG. 4 is a block diagram illustrating a control relationship between main components of a laundry processing apparatus according to an exemplary embodiment of the present invention. Referring to FIG.
5 is a top view of the second washing tub mounted on the balancer.
6 is a flowchart illustrating a control method of the laundry processing apparatus according to an embodiment of the present invention.
Fig. 7 shows (a) the discharged amount detected according to the amount of water supplied to the second washing tank, and (b) the corrected value of the discharged amount.

1 is a side cross-sectional view of a laundry processing apparatus according to an embodiment of the present invention. 2 is a perspective view of the second washing tub. 3 shows a state in which the second washing tub is disassembled. FIG. 4 is a block diagram illustrating a control relationship between main components of a laundry processing apparatus according to an exemplary embodiment of the present invention. Referring to FIG. 5 is a top view of the second washing tub mounted on the balancer.

1 to 5, the cabinet 2 forms an appearance of the laundry processing apparatus, and forms a space in which the water storage tank 4 is housed inside. The cabinet 2 is supported by a flat cabinet base 5, the top surface is open, and may include front, left, right, and rear surfaces.

The top cover 3 may be coupled to the open upper end of the cabinet 2. [ The top cover 3 may be provided with a charging port for charging and discharging laundry (or " capsule "). A door (not shown) for opening and closing the inlet may be rotatably coupled to the top cover 3.

The water storage tank 4 is for storing wash water, and can be suspended in the cabinet 2 by the support rod 15. The support rods 15 may be provided at four corners of the cabinet 2, one end of each support rod 15 is pivotally connected to the top cover 3, Is connected to the water storage tank (4) by the water supply pipe (27).

The water storage tank 4 is opened on the upper surface, and the water storage tank cover 14 is provided on the opened upper surface. The reservoir cover (14) is formed in the form of a ring having a substantially circular opening at its center, and laundry is introduced through the opening.

In the water storage tank 4, a first washing tub 6 accommodating laundry and rotated around a vertical axis O (see FIG. 5) may be disposed. The vertical axis is substantially perpendicular to the paper surface, and may be accurately aligned on a vertical line with the paper surface, but may be inclined at a predetermined angle (preferably, 5 degrees or less) with respect to the vertical line. The first washing tub 6 may be provided with a plurality of through holes through which water may pass and water may be exchanged between the first washing tub 6 and the water storage tank 4 through the through holes.

The first washing tub 6 may include a drum 61 having an opened upper side and a ring balancer 62 coupled to the upper side of the drum 61. The lower side of the drum 61 can be connected to the rotary shaft of the driving unit 8 by the hub 29. The through hole may be formed in the drum 61.

The balancer 62 compensates for the eccentricity caused when the drum 61 rotates. An annular cavity (not shown) may be formed inside the balancer 62. Fluids (e.g., brine) or a plurality of weights (e.g., metal spheres) may be inserted into the cavity. The annular cavities 62a and 62b have different diameters, but a plurality of annular cavities may be formed.

When the drum 61 is rotated to one side, the fluid or the weight is moved in a direction opposite to the direction in which the drum 61 is displaced, thereby correcting the eccentricity. Since the ring-shaped balancer 62 applied to the laundry processing apparatus has already been known in various forms, the further description thereof will be omitted.

And a second washing tub 100 attached to and detached from the first washing tub 6 is provided. The second washing tub 100 receives the laundry and is detachably coupled to the first washing tub 6. When the first washing tub 6 is rotated while the second washing tub 100 is installed, the second washing tub 100 is also rotated integrally with the first washing tub 6.

The user may insert the first laundry into the first washing tub 6 or install the second washing tub 100 in the state where the second washing tub 100 is not yet installed, 2 Laundry can be put in.

A pulsator (9) can be rotatably provided on the inner lower side of the first washing tub (6). The pulsator 9 may include a plurality of upwardly projecting radial ribs. When the pulsator 9 is rotated, water flow can be formed by the ribs.

In the cabinet 2, a first washing tub 6 and a driving unit 8 for providing power for rotating the pulsator 9 may be disposed. The driving unit 8 may be provided below the water storage tank 4 and may be provided in the form of hanging in the cabinet 2 together with the water storage tank 4. The rotary shaft of the driving unit 8 is always engaged with the pulsator 9 and can be engaged or disengaged from the first washing tub 6 according to the switching operation of the clutch (not shown). The pulsator 9 and the first washing tub 6 are integrally rotated when the driving unit 8 is operated with the rotating shaft of the driving unit 8 engaged with the first washing tub 6, When the rotary shaft is operated in a state of being separated from the first washing tub 6, only the pulsator 9 is rotated in the state where the first washing tub 6 is stopped.

The driving unit 8 may include a washing motor capable of speed control. The washing motor may be an inverter direct drive motor. The control unit 91 may include a proportional-integral controller (PI controller), a proportional-integral-differential controller (PID controller), and the like. The controller receives an output value (e.g., an output current) of the washing motor as an input, and based on the output value, determines whether the rotational speed (or rotational speed) of the washing motor follows a predetermined target rotational speed Can be controlled.

It is to be understood that the control unit 91 can control not only the washing motor but also the entire operation of the laundry processing apparatus, and that the control of each of the following components is controlled by the control unit 91.

On the other hand, the laundry processing device may include at least one water supply pipe 11 for guiding water supplied from an external water source such as a faucet. The at least one water supply pipe 11 may include a cold water pipe (not shown) for receiving cold water from an external water source and a hot water pipe (not shown) for receiving hot water.

A water supply unit 13 for supplying water supplied from an external water source to the first washing tank 6 and / or the second washing tank 100 may be provided. The water supply unit (13) can selectively intermittently control the at least one water supply pipe (11). To this end, the water supply section 13 may include at least one water supply valve. When the at least one water supply valve is opened under the control of the control unit 91, water is supplied to the dispenser 16 through the water supply pipe corresponding to the opened water supply valve.

And a water level sensor (not shown) for sensing the water level in the first washing tub 6 may be provided. The control unit 91 can control the amount of water supplied through the water supply unit 13 based on the detection value of the water level sensor.

The dispenser 16 supplies the additive acting on the laundry together with the water supplied through the water supply pipe 11. The additives supplied by the dispenser 16 include a detergent for laundry and a fabric softener for rinsing.

The second washing tub 100 can be inserted into a space defined by the ring-shaped balancer 62 (or an approximately circular opening), and can be supported by the balancer 62 in this inserted state. The outer circumferential surface of the second washing tub 100 may be provided with concavities and convexities 114 that extend obliquely upward and downward.

The balancer 62 may have a fixing groove 62d corresponding to the unevenness 114 on the inner circumferential surface defining the central opening. The concavity and convexity 114 is inserted along the fixing groove 62d so that when the first washing tub 6 is rotated the second washing tub 100 is not loosened and rotated integrally with the first washing tub 6 .

5, the outer shape of the second washing tub 100 includes a first section S1 in contact with the inner circumferential surface of the balancer 62 (or a surface defining the central opening) And a second section S2 that is spaced apart from the inner circumferential surface of the base plate 62.

The first section S1 is located on the first axis IV-IV passing through the vertical axis O and the second section S2 is located on the second axis IV passing through the vertical axis O and perpendicular to the first axis IV- And may be positioned on the two axes Y. The first section S1 may be formed on both sides symmetrically with respect to the second axis Y and the second section S2 may be formed on both sides symmetrically with respect to the first axis IV- have.

The water discharged from the water supply unit 13 is supplied to the first washing tank 6 when the first washing tank 6 (or the second washing tank 100) is in the first rotating position under the control of the driving unit 8 by the control unit 91, And may be supplied to the first washing tub 6 through a gap formed between the second section S2 and the inner peripheral surface of the balancer 62. [

The water discharged from the water supply section 13 when the first washing tub 6 is in the second rotation position rotated by the predetermined angle from the first rotation position is controlled by the control section 91 under the control of the driving section 8, And is supplied to the second washing tank (100). The second washing tub 100 may be provided with an inlet port 137 through which the water discharged from the water supplying section 13 flows and the inlet port 137 is aligned with the water supplying section 13 in the second rotating position . The inlet 137 can be disposed on both sides of the second washing tub 100 and 137 (1) and 137 (2) indicate both inlets. Preferably, May be disposed along the first axis (IV-IV) to be symmetrical.

The second rotation position may be a position where the first washing tub 6 is rotated 90 degrees from the first rotation position. The control unit 91 controls the rotation angle of the first washing tub 6 or the rotating position of the first washing tub 6 based on the speed of the washing motor 6 as described above, Can be controlled.

Specifically, a first hall sensor (not shown) may be provided in the reservoir cover 14, and a first magnet may be provided in the second washing tank 100. During rotation of the second washing tub 100, the first hall sensor may sense the magnetic field formed by the first magnet and send a signal to the control unit 91 based on the sensed magnetic field. The control unit 91 can grasp the rotation speed, the rotation position (or the position of the first magnet) and the rotation angle of the second washing tub 100 based on the received signal, Can be controlled to be aligned with the first rotation position or the second rotation position.

Meanwhile, a second magnet may be further provided on the rotor of the washing motor, and a second hall sensor for sensing a magnetic field generated by the second magnet may be disposed in a fixed structure near the second magnet The bottom surface of the water storage tank 4). The plurality of second magnets may be disposed along the circumference of the rotor. The control unit 91 can control the washing motor based on the signal output from the second hall sensor. At this time, by considering the signals output from the first hall sensor, Can be controlled to be aligned to the first rotation position or the second rotation position.

Meanwhile, according to the embodiment, the rotation angle of the rotor can be sensed without a separate sensor. That is, the rotation angle of the rotor can be sensed by a sensorless sensorless method. This sensorless method can estimate the position of the rotor of the washing motor based on an output current detected while a current of a certain frequency flows to the washing motor after allowing a phase current of a predetermined frequency to flow to the washing motor. Such a sensorless system corresponds to a known technology, and a detailed description thereof will be omitted.

The second washing tub 100 may include a container 110, a first cover 120, and a second cover 130. The container 110 is filled with laundry and water. The container 110 is opened on the upper side, and the first cover 120 is coupled to the opened upper side. The first cover 120 may be engaged with the upper end of the container 110. The first cover 120 and the container 110 are each made of a synthetic resin material and are preferably connected by welding, more preferably by heat welding, but are not necessarily limited thereto.

A guide rib 126 protruding from the inner surface of the container 110 and extending in the vertical direction may be provided. The water flow generated by the rotation of the second washing tub 100 can be raised by the collision with the guide rib 126 and then dropped to the center of the container 110. [ The concave and convex portions 114 may be formed on the outer surface of the container 110. The container 110 may be made of a transparent material so that the laundry contained in the inside can be seen from the outside.

The first cover 120 is provided with an opening 121h at a substantially central portion thereof to provide space for accommodating the detergent box 140 (Fig. 5) so that laundry can be introduced into the container 110. Fig. The detergent box 140 may be attached to or detached from the first cover 120. The detergent boxes 140 may be provided on both sides of the first cover 120, respectively.

When the second washing tub 100 is rotated, the water stream developed toward the outside along the radial direction due to the centrifugal force rises along the inner surface of the container 110 in the container 110. The first cover 120 may be formed with a flow path for guiding the ascended water flow to the discharge port 124. The control unit 91 can control the speed of the second washing tub 100 (or the speed of the driving unit 8) so that the water in the container 110 is discharged through the discharge port 124, Is collected in the water storage tank (4). This process may be performed when washing the laundry in the second washing tub 100 and draining the water used for washing.

Although not shown, a check valve for interrupting the flow path may be further provided, and the check valve may be configured to be opened or closed by a centrifugal force generated by rotation of the second washing tub 100, or by a water pressure .

The second cover 130 is detachably coupled to the first cover 120, and an opening 131 is formed at a substantially central portion thereof. The second cover 130 includes a water supply guide 133 for guiding the water discharged from the water supply unit 13 to the detergent box 140. The water supply guide 133 forms an inclined surface so that water discharged from the water supply unit 13 is guided downward and water guided along the inclined surface is supplied to the detergent box 140 through the water supply port 141. The water supply guide 133 may be provided on both sides of the first cover 120, respectively. Both of the water supply guides 133 (1) and 133 (2) are preferably arranged along the first axis IV-IV so as to be symmetrical with respect to the second axis Y. [

The detergent box 140 is for containing a detergent, a bleach or a fabric softener. Water discharged from the water supply section 13 is supplied into the second washing tank 100 together with the detergent, via the detergent box 140.

The first cover 120 may be formed with a housing 128 in which the detergent box 140 is received and the detergent box 140 may be detachably coupled to the housing 128.

The detergent boxes 140 may be provided on both sides of the second cover 130, respectively. The detergent box 140 may be disposed at a position corresponding to each of the pair of inlets 137 (1) and 137 (2). The first detergent box 140 (1) may be filled with a detergent or bleach agent, and the second detergent box 140 (2) may be supplied with a fabric softener. Depending on the rotational position of the second washing tub 100, the water discharged from the water supply unit 13 can be selectively supplied to the first detergent box 140 (1) or the second detergent box 140 (2) . For example, the controller 91 controls the supply of water to the first detergent box 140 (1) during the washing cycle and the water supply to the second detergent box 140 (2) during the rinsing cycle The rotational position of the second washing tub 100 can be controlled.

The laundry processing apparatus may further include a drainage bellows 21 for draining water from the water storage tank 4 and a drain valve 22 for interrupting the drainage bellows 21. The drainage bellows 21 can be connected to the pump 24. When the drain valve 22 is opened, water can be supplied to the pump 24 through the drainage bellows 21. The water thus introduced into the pump 24 is discharged to the outside of the laundry processing apparatus through the drain pipe 25 when the pump 24 is operated.

The replenishment amount can be obtained based on the characteristic value that varies depending on the load of the driving unit 8. [ For example, as more wafers are charged into the first and second washing tanks 6 and / or 100, when the driving unit 8 is rotated at a predetermined target speed, As the electromotive force increases, it is possible to detect the electromotive force and calculate the mass based on the detected electromotive force.

The driving inertia of the first washing tub 6 and the second washing tub 100 is large so that the driving unit 8 reaches the predetermined target speed More time is needed before. Therefore, it is possible to determine the discharge amount based on the time taken for the driving unit 8 to reach the target speed.

As another example, the amount of the laundry may be determined on the basis of the time taken for stopping the driving unit 8 by stopping the rotation of the rotating driving unit 8. In this case, rotation of the first and second washing tanks 6, It uses inertia.

In addition, the method for obtaining the amount of waste is well known in the art, and the control unit 91 can calculate the amount of waste based on these known techniques.

6 is a flowchart illustrating a control method of the laundry processing apparatus according to an embodiment of the present invention. Fig. 7 shows (a) the discharged amount detected according to the amount of water supplied to the second washing tank, and (b) the corrected value of the discharged amount. Hereinafter, a method of controlling the laundry processing apparatus according to an embodiment of the present invention will be described with reference to FIGS.

Step S1 is a step of receiving a selection of a washing course from the user. The laundry processing apparatus may be provided with an input unit 92 such as a button, a dial, and a touch panel so that the user can select the washing course. Selectable laundry courses include regular laundry and simultaneous laundry. The user can operate the input unit 92 to select the normal laundry or the simultaneous laundry. Here, the general laundry is a course to be selected by the user when washing is to be performed in a state where the second washing tub 100 is not installed, and the simultaneous washing is a course selected by the user when the second washing tub 100 is installed. It is the course to do.

In step S2, the drive unit 8 is rotated for detection of the amount of droplet. In this process, a characteristic value (for example, output current of the drive unit 8, counter electromotive force, etc.) varying according to the load acting on the drive unit 8 is detected . The characteristic value may be detected in a circuit to which the driving unit 8 is connected. For this purpose, a voltage sensor, a current sensor, and the like may be provided.

Step S3 is a step of estimating the amount of waste, and the amount of waste is determined based on the characteristic value detected in step S2. The determined amount is stored in the memory 94. [ The memory 94 stores various data necessary for controlling the laundry processing apparatus. These data are coded and stored in a form readable by the control unit 91. The data may include various operation settings such as, for example, an operation execution program, a water level according to the amount of water, a dehydration rate, an operation time, and the like.

Step S4 is a step in which the control unit 91 judges which washing course has been selected in step S2. If the simultaneous laundry course is selected in step S2, step S6 is performed, and if not, step S5 is performed. In the embodiment, when simultaneous washing is not selected in step S2, general laundry is automatically selected, but it is also possible that general laundry is selected through the input unit 92. [

In step S5, the water level is set in accordance with the amount of the water determined in step S3. The control unit 91 may compare the discharged amount detected in the step S3 with the water supply level according to the amount stored in the memory 94 to determine the water supply level corresponding to the sensed discharged amount. When the water level in the first washing tank 6 reaches the determined water level by the water level sensor, the control unit 91 controls the water level by the water level sensor, Can be controlled to be stopped. Thereafter, the control unit 91 can control washing, rinsing, dehydration, etc. according to a predetermined algorithm.

On the other hand, if the simultaneous washing is selected in step S2 and the step S6 is performed, the control unit 91 can correct the amount calculated in step S3. The reason for this correction is that the amount detected in the case of the simultaneous washing is determined not only by the weight of the first washing tub 6 and the bags contained therein but also by the weight of the second washing tub 100 and the weight contained in the second washing tub 100 The amount of water supplied to the first washing tank 6 is larger than the amount of water required for the treatment of the actual washing water introduced into the first washing tank 6, Or more of water is consumed, and accordingly, there is a problem that unnecessary electric power is consumed even in a washing, rinse or dehydration operation after the water supply.

 For this reason, in step S6, the replenishing amount x calculated in step S3 is corrected, and this process is performed by subtracting a predetermined correction value y from the replenishing amount x. That is, the replenishment amount z corrected in the step S6 can be expressed by the following equation.

z = x-y, z = corrected mass, x = mass obtained in step S3, y = correction value

Here, the correction value y may be set corresponding to the weight of the second washing tub 100. That is, the control unit 91 can determine the corrected quantity z by subtracting the quantity value y corresponding to the weight of the second washing tub 100 from the quantity of the laundry (x).

Alternatively, the correction value y may be set corresponding to the sum of the weight of the second washing tub 100 and the half of the maximum allowable load M that can be accommodated in the second washing tub 100. The maximum permissible load M is set for securing durability of the laundry processing apparatus and preventing the occurrence of a safety accident. The maximum allowable load M is a maximum load that the second washing tub 100 can be charged within a range in which the normal operation of the laundry processing apparatus is ensured, This is a value that is generally notified by the manufacturer of the laundry processing apparatus through the product manual.

The values shown in the area (a) of FIG. 7 are the amounts measured while the load applied to the second washing tub 100 is varied while the laundry is not completely introduced into the first washing tub 6. In the graph, the X axis represents an input load (m, load applied to the second washing tub 100) with respect to the maximum allowable load M, which is hereinafter referred to as a " load ratio ". According to the water level according to the amount of water stored in the memory 94, when the water amount is less than WL1, the water is not supplied to the first washing tank 6, The first water level is set by the control unit 91, the second water level is set when the water level is WL2 or more and WL3 (a value greater than WL2) is set in the case where the amount is WL1 or more and less than WL2 .

(the values determined in step S3) displayed in the area (a) are the values sensed while only changing the amount of the laundry to be supplied to the second washing tub 100 while the laundry is not put in the first washing tub 6 , It is possible to prevent unnecessary water from being supplied to the first washing tank 6 when the water amount at this time is less than WL1. However, if the water supply level according to the washing amount is predetermined as in the embodiment, Therefore, when the water level is set without correcting the discharged amount, there occurs a problem that water is supplied to the first water level even though the first washing tub 6 is empty.

Therefore, in order to solve such a problem, the replenishing amount is corrected in the step S6, and the corrected replenishing amount is indicated in the area (b) of FIG. 7, Therefore, when the water level is set in accordance with the corrected amount, the first washing tub 6 is not supplied with water, and unnecessary water supply is not performed.

When the first washing tank 6 is empty and an arbitrary load less than the maximum allowable load is input into the second washing tank 100, the correction value y is set to a value corresponding to the predetermined minimum water level (WL1).

Since the second washing tank 100 is relatively small in capacity as compared with the first washing tank 6, it is not necessary to control the water supply according to the water supply level. For example, when a predetermined amount of water is supplied to the second washing tub 100 ). ≪ / RTI > The water supply to the second washing tub 100 is controlled by controlling the water supply time by the water supply unit 13 or by providing a flow meter for sensing the flow rate supplied through the water supply unit 13 according to the embodiment, The water quantity can be controlled based on the value.

On the other hand, when the simultaneous washing is selected, a predetermined message may be output through the output unit 93 when the quantity determined in step S6 is equal to or greater than a preset reference value. In the case of simultaneous washing, the laundry may interfere with the second washing tub 100 when a certain amount of laundry is introduced into the first washing tub 6. Accordingly, the reference value is set within a range in which the laundry introduced into the first washing tank 6 does not interfere with the second washing tank 100. If the laundry amount corrected in step S6 is equal to or greater than the reference value, The user is alerted to the fact that excessive laundry has been introduced into the first washing tub 6. Output 93 may include a visual display device (e.g., LCD, LED) and / or an audible display device (e.g., buzzer, speaker).

The laundry processing apparatus may further include a communication unit 95 connected to a wireless network. In this case, if the volume compensated in step S6 is equal to or larger than the reference value, the control unit 91 can control to transmit the notification signal through the communication unit 95. [ A user's mobile terminal (not shown, for example, a smart phone) may be connected to the wireless network. In this case, a notification corresponding to the notification signal may be output through the mobile terminal.

Claims (6)

A first washing tub which is rotated about a vertical axis and a second washing tub which is detachably coupled to the first washing tub, wherein the first washing tub and the second tub are integrally formed by a driving part for rotating the first washing tub, The method comprising the steps of:
(A) selecting either normal laundry or simultaneous laundry;
(B) rotating the driving unit and detecting characteristic values that vary according to a load acting on the driving unit;
Wherein when the general laundry is selected in the step (a), the amount of laundry is determined on the basis of the characteristic value detected in the step (b), and when the simultaneous washing is selected in the step (b) (C) determining a quantity to be packed based on a value obtained by subtracting a preset correction value; And
(D) setting a water supply level according to a preset reference based on the amount of water determined in the step (c), and supplying water into the first washing tank until the set water supply level is reached. The method according to claim 1,
Wherein the correction value is a correction value,
Wherein the predetermined value corresponds to the weight of the second washing tub. The method according to claim 1,
Wherein the correction value is a correction value,
Wherein the washing machine is set to correspond to a sum of the weight of the second washing tub and a half of the maximum allowable load acceptable to the second washing tub. The method according to claim 1,
Wherein the correction value is a correction value,
Wherein the control unit is configured to set a value corresponding to a sum of a weight of the second washing tub and a maximum allowable load that can be accommodated in the second washing tub. The method according to claim 1,
Further comprising the step of outputting a predetermined message through an output unit when the simultaneous laundry is selected and the laundry quantity determined in step (c) is equal to or greater than a preset reference value. The method according to claim 1,
Further comprising the step of transmitting a notification signal through a communication unit connected to the wireless network when the simultaneous laundry is selected and the quantity determined in step (c) is equal to or greater than a preset reference value.

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