KR102404185B1 - Washing machine and operating method thereof - Google Patents

Abstract

The present invention relates to a washing machine for efficiently using energy by determining the amount of laundry put into a washing tub and an auxiliary washing tub, respectively. The laundry amount of the washing tub and the laundry amount of the auxiliary washing tub are measured using the first weight obtained by rotating the auxiliary washing tub and the washing tub, which is detachably installed inside the washing tub, and the second weight obtained by rotating the pulsator. It may include a control unit to obtain each.

Description

Washing machine and operating method thereof

The present invention relates to a washing machine and an operating method thereof, and more particularly, to a washing machine capable of mounting an auxiliary washing tub to enable separate washing, and an operating method thereof.

In general, a washing machine is a device that promotes physical and chemical action and removes dirt on laundry by applying an appropriate detergent and mechanical force, and performs washing, rinsing, and dehydration processes.

In some cases, since the laundry is washed in the washing tub, the washing machine may need to be washed separately according to the color or material of the laundry. Accordingly, when laundry needs to be washed separately according to the color or material of the laundry, a separate laundry space is provided inside the washing tub to enable separate washing, thereby reducing the number of times the washing machine is operated and saving washing water and energy. There is a washing machine equipped with

On the other hand, although the auxiliary washing tub is detachable, according to the related art, it is difficult to determine whether the auxiliary washing tub is installed. In addition, according to the prior art, there is a problem in that it is difficult to detect the amount of laundry when the auxiliary washing tub is installed.

An object of the present invention is to provide a washing machine capable of detecting whether an auxiliary washing tub is installed and an operating method thereof.

An object of the present invention is to provide a washing machine that calculates the amount of laundry put into a washing tub and the amount of laundry put into an auxiliary washing tub, respectively, and an operating method thereof.

The washing machine according to an embodiment of the present invention includes a washing tub and a pulsator that is formed on the bottom surface of the washing tub, a pulsator that forms a rotating water flow in the washing water, is detachably installed inside the washing tub, and is separated from the washing tub to perform washing separately from the auxiliary washing tub and washing tub. and a control unit configured to respectively obtain the laundry amount of the washing tub and the laundry amount of the auxiliary washing tub by using the first weight obtained by rotating the pulsator and the second weight obtained by rotating the pulsator.

The first weight may be the sum of the load weight of the washing tub, the weight of the auxiliary washing tub, and the load weight of the auxiliary washing tub, and the second weight may be the load weight of the washing tub.

The apparatus may further include a storage unit storing the weight of the auxiliary washing tub, and the controller may obtain the load weight of the auxiliary washing tub by subtracting the weight and the second weight of the auxiliary washing tub from the first weight.

The storage unit may further store a laundry weight table corresponding to the load weight and the laundry weight level, and the controller may obtain a laundry weight level corresponding to the load weight of the washing tub and a laundry weight level corresponding to the load weight of the auxiliary washing tub based on the laundry weight table. .

It may further include a sensor for detecting whether the auxiliary washing tub is installed.

When the auxiliary washing tub is installed, the controller rotates the washing tub and the pulsator, respectively, to obtain the laundry amount of the washing tub and the auxiliary washing tub.

The apparatus may further include an input unit for receiving a washing course selection command and an output unit for outputting a course selection warning notification when the washing course selected through the input unit does not match whether the auxiliary washing tub is installed through the sensor unit.

The controller may control the output unit to output a warning notification of the amount of laundry in the washing tub when the auxiliary washing tub is mounted and the laundry amount in the washing tub is equal to or greater than a preset standard.

The controller may set the amount of washing water and the washing intensity based on the laundry amount of the washing tub and the laundry amount of the auxiliary washing tub.

According to an embodiment of the present invention, since the amount of laundry in the washing tub and the amount of laundry in the auxiliary washing tub can be determined respectively, the amount of washing water required for washing and the washing intensity can be set more appropriately, so that energy such as washing water and electricity can be efficiently saved There are advantages to using it.

In addition, according to an embodiment of the present invention, there is an advantage in that the amount of laundry in the washing tub and the amount of laundry in the auxiliary washing tub can be respectively determined by changing the rotating structure without adding a separate structure.

According to an embodiment of the present invention, there is an advantage in that the laundry weight of laundry can be more accurately obtained by detecting whether the auxiliary washing tub is installed and changing the method of detecting the amount of laundry according to whether the auxiliary washing tub is installed.

In addition, according to an embodiment of the present invention, it is determined whether the auxiliary washing tub is installed and the washing course corresponds, and it is determined whether the laundry amount of the laundry is greater than or equal to the reference amount to minimize the malfunction of the washing machine or damage to the structure. There are advantages that can be

1 is a configuration diagram showing a washing machine according to the present invention.
Figure 2 is a perspective view showing the mounting structure of the auxiliary washing tub according to the present invention.
3 is a block diagram for explaining the configuration of a washing machine according to an embodiment of the present invention.
4 is a flowchart illustrating a method for a washing machine to detect a laundry amount of a washing tub and a laundry amount of an auxiliary washing tub according to an embodiment of the present invention.
5 is an exemplary diagram illustrating a method for a washing machine to output a course selection warning notification according to an embodiment of the present invention.
6 is an exemplary view for explaining a method of outputting, by a washing machine, a laundry amount warning notification of a washing tub according to an embodiment of the present invention.
7 is an exemplary diagram illustrating a method for a washing machine to output a course selection warning notification according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with drawings.

<Washing machine with auxiliary washing tub installed>

1 is a configuration diagram illustrating a washing machine according to the present invention, and FIG. 2 is a perspective view illustrating a mounting structure of an auxiliary washing tub according to the present invention.

As shown in FIG. 1, the washing machine according to the present invention has a case 52 forming an outer periphery, and a dehydration tank ( 56), a washing tub 54 rotatably installed inside the dehydration tub 56 to wash laundry, and a washing tub 54 detachably installed inside the washing tub 54 to separate laundry from the washing tub 54 It may be configured to include an auxiliary washing tub 80 to be made.

In addition, a cover 68 is installed on the upper side of the case 52 to prevent the laundry from being separated from the washing tub 54 and the dehydration tub 56 , and a control unit 70 for controlling the operation of the washing machine is provided in front of the cover 68 . is built-in, and a water supply device 72 for supplying washing water into the washing tub 54 or the auxiliary washing tub 80 is built in the rear of the cover 68 .

In addition, a pulsator 58 for forming a rotational water flow in the washing water is installed on the bottom of the washing tub 54, and an auto balance mechanism 54a for maintaining balance when the washing tub 54 rotates is provided on the upper side of the washing tub 54 is installed

<Auxiliary laundry tub>

As shown in FIG. 2, the auxiliary washing tub 80 has a plurality of locking protrusions 82 formed on the upper circumferential surface, and on the inner surface of the auto balance mechanism 54a, locking protrusions corresponding to the locking protrusions 82 are formed. A plurality of engaging grooves 55 into which the 82 is fitted are formed.

Accordingly, when separate washing is required, the auxiliary washing tub 80 is mounted on the upper side of the washing tub 54 and rotates simultaneously with the washing tub 54 to wash the laundry separately from the washing tub 54. Otherwise, the washing tub 54 ) can be separated from That is, the auxiliary washing tub 80 may be detachably installed inside the washing tub 54 . When the auxiliary washing tub 80 is separated from the washing tub 54, it may be used as a laundry basket.

The auxiliary washing tub 80 may be separated from the washing tub 54 to perform washing.

In addition, the auxiliary washing tub 80 is integrally formed with washing wings 84 on the bottom surface or a plurality of baffles 86 on the inner surface to form a wash water flow in the wash water.

In addition, the auxiliary washing tub 80 is supplied with wash water from the water supply device 72, and when the auxiliary washing tub 80 is rotated at a speed greater than or equal to a predetermined speed, it is located on the upper side of the side so that the washing water can be drained from the auxiliary washing tub 80 by centrifugal force. A plurality of drain holes 88 may be formed.

<Operation of washing machine with auxiliary washing tub installed>

The process of processing laundry is largely a process of mixing detergent with washing water, a process of washing laundry using washing water mixed with detergent, a process of rinsing laundry by introducing wash water without detergent from the outside into the washing tub; and a dehydration process of removing wash water from the laundry that has been washed. In addition, a laundry treatment process of drying or ironing and discharging laundry may be further included, but basically, the laundry treatment method is based on a detergent mixing process, a washing process, a rinsing process, and a dehydration process.

The operation of the washing machine described with reference to FIGS. 1 and 2 is as follows.

When power is supplied to the washing machine and the user selects a washing course, the amount of laundry may be sensed according to a control signal from the controller 70 . The controller 70 may control so that an appropriate amount of wash water is supplied to the auxiliary washing tub 80 , the washing tub 54 , and the dehydrating tub 56 according to the sensed laundry amount.

Wash water is first supplied to the auxiliary washing tub 80 through the water supply device 72 , and then the washing water in the auxiliary washing tub 80 is supplied to the washing tub 54 through the drain hole 88 .

As such, when an appropriate amount of wash water is supplied to the washing tub 54 and the auxiliary washing tub 80, the washing tub 54 and the pulsator 58 are selectively rotated in the forward or reverse direction by the clutch 64 and the motor 66. As the washing machine 54 is washed, the laundry is washed.

In addition, the auxiliary washing tub 80 is also rotated together with the washing tub 54 to form a wash water flow in the washing water by the washing wings 84 and baffles 86 formed therein, so that washing of laundry is carried out in the auxiliary washing tub 80 as well. is done

After the washing process as described above, a rinsing process and a dehydration process may be performed.

When the washing tub 54 rotates at a speed greater than or equal to a predetermined value during the dehydration process, the auxiliary washing tub 80 rotates together with the washing tub 54 and the washing water inside the auxiliary washing tub 80 by centrifugal force passes through the drain hole 88. The wash water discharged to the washing tub 54 is discharged to the outside through the drainage device 74 formed at the lower end of the dewatering tub 56 together with the wash water in the washing tub 54, so that all washing processes can be completed. have.

The user may install the auxiliary washing tub 80 inside the washing tub 54 when separate washing is required according to the color or material of the laundry. That is, the washing machine may operate in a state in which the auxiliary washing tub 80 is mounted or in a state in which the auxiliary washing tub 80 is not mounted.

Since the washing machine needs to properly input the amount of washing water and detergent according to the amount of laundry, when the auxiliary washing tub 80 is installed, energy can be efficiently used by sensing the amount of laundry put into the auxiliary washing tub and the amount of laundry put into the washing tub 54, respectively. can

3 is a block diagram for explaining the configuration of a washing machine according to an embodiment of the present invention.

The washing machine according to an embodiment of the present invention includes a washing tub 54 , an auxiliary washing tub 80 , a pulsator 58 , a sensor unit 91 , a water level sensing unit 92 , an input unit 94 , a storage unit 95 and A control unit 70 may be included.

The washing tub 54, the auxiliary washing tub 80, the pulsator 58, and the control unit 70 are the same as those described with reference to FIGS. 1 and 2, and thus detailed descriptions thereof will be omitted.

The controller 70 may control the overall operation of the washing machine, and may control the washing tub 54 , the auxiliary washing tub 80 , the pulsator 58 , the sensor unit 91 , and the water level sensor 92 .

<Detect whether the auxiliary sensor is installed>

The auxiliary washing tub 80 may be mounted on the upper side of the washing tub 54 . Specifically, as the plurality of locking protrusions 82 formed on the auxiliary washing tub 80 are fitted into the locking grooves 55 formed on the inner surface of the auto balance mechanism 54a, the auxiliary washing tub 80 may be mounted. .

The sensor unit 91 may be a Hall sensor. However, since this is only an example, the type of the sensor is not limited. Since the operation method of the Hall sensor is a known technique, a detailed description thereof will be omitted.

The sensor unit 91 may be formed in either the locking protrusion 82 of the auxiliary washing tub 80 or the locking groove 55 of the auto balance mechanism 54a. When the sensor unit 91 is positioned on the locking protrusion 82 , the locking groove 55 may be detected. In this case, the sensor unit 91 may detect that the auxiliary washing tub 80 is installed when the engaging groove portion 55 is detected. Alternatively, when the sensor unit 91 is located in the locking groove portion 55, the locking projection 82 can be detected. In this case, the sensor unit 91 may detect that the auxiliary washing tub 80 is mounted when the locking protrusion 82 is detected. Hereinafter, for convenience of description, the sensor unit 91 will be described as being positioned in the locking groove portion 55 as an example, but the position of the sensor unit 91 is not limited thereto.

A plurality of engaging grooves 55 are formed on the inner surface of the auto balance mechanism 54a, and the sensor unit 91 may be positioned in at least one of the plurality of engaging grooves 55 .

According to an embodiment, the washing machine includes one sensor unit 91 , and one sensor unit 91 may be formed in any one of the plurality of locking grooves 55 . Therefore, the control unit 70 can detect that the auxiliary washing tub 80 is mounted when the locking protrusion 82 is inserted into the locking groove part 55 in which the sensor unit 91 is located among the plurality of locking groove parts 55 . .

According to another embodiment, the washing machine may include a plurality of sensor units 91 , and the number of the sensor units 91 may be less than or equal to the number of the engaging groove units 55 . Each of the plurality of sensor units 91 may be respectively located in the plurality of engaging grooves 55 . That is, one sensor unit 91 may be located in one locking groove portion 55 . The controller 70 may detect that the auxiliary washing tub 80 is installed when the locking protrusions 82 are fitted in all of the locking grooves 55 in which the sensor unit 91 is located. As the position of the sensor unit 91 increases, there is an advantage in that it is possible to more accurately determine whether the auxiliary washing tub 80 is installed.

<Water level sensor>

The water level sensor 92 may be formed on at least one of the inner surface of the washing tub 54 and the inner surface of the auxiliary washing tub 80 .

The water level sensor 92 formed on the inner surface of the washing tub 54 may detect the amount of wash water injected into the washing tub 54 .

The water level sensor 92 formed on the inner surface of the auxiliary washing tub 80 may detect the amount of wash water injected into the auxiliary washing tub 80 .

The water level detection unit 92 may detect whether proper washing water is input into the washing tub 54 or the auxiliary washing tub 80 .

<Output part>

The output unit 93 may display information related to the operation of the washing machine. For example, the output unit 93 may display a message such as whether the washing course is properly selected or the amount of laundry is not appropriate.

The user can grasp a problem that has occurred in the washing machine through the information displayed on the output unit 93 and can use the washing machine correctly.

<Input part>

The input unit 94 may receive an input signal from the outside. The input signal may include a washing course selection command for setting a washing course. Here, the washing course may include a general course for washing only the laundry included in the washing tub 54 and an auxiliary washing course for simultaneously washing the laundry included in the washing tub 54 and the auxiliary washing tub 80 .

The user may input a washing course through the input unit 94 .

When a washing course is input, the control unit 70 may perform washing by sensing the amount of laundry. When the auxiliary washing tub 80 is installed, the control unit 70 can perform washing by detecting both the laundry amount of the washing tub and the laundry amount of the auxiliary washing tub. washing can be performed.

<Storage>

The storage unit 95 may store data necessary for detecting the laundry amount of the washing tub and the laundry amount of the auxiliary washing tub. As a specific example, the storage unit 95 stores at least one or more of the weight of the auxiliary washing tub 80 and the table corresponding to the information on the slope value of ΔRPM/ΔT and the weight table, and the laundry quantity table corresponding to the load weight and the laundry quantity level. may be stored. In addition, the storage unit 95 may store a laundry weight table corresponding to a load weight and a laundry weight level when there is no moisture in the laundry, and a laundry weight table corresponding to a load weight and a laundry weight level when the laundry is wet, respectively.

In addition, the storage unit 95 may store various data necessary for the operation of the washing machine.

<Sensing the laundry amount of the washing tub and the laundry amount of the auxiliary washing tub>

4 is a flowchart illustrating a method for a washing machine to detect a laundry amount of a washing tub and a laundry amount of an auxiliary washing tub according to an embodiment of the present invention.

The control unit 70 may receive a washing course selection command (S101).

As described above, the washing course selection command may include a command for selecting a general course and a command for selecting an auxiliary washing course.

The control unit 70 may detect whether the auxiliary washing tub 80 is installed (S103).

As described above, the control unit 70 may detect whether the auxiliary washing tub 80 is mounted through the sensor unit 91 .

According to an embodiment, the control unit 70 may rotate the tub to detect whether the auxiliary washing tub 80 is installed. That is, the control unit 70 may rotate the washing tub 54 at a preset rpm, and may detect whether the auxiliary washing tub 80 is installed according to whether the sensor unit 91 detects a signal during rotation.

As described above, according to the present invention, a method of calculating the amount of laundry when the auxiliary washing tub is installed by detecting whether the auxiliary washing tub is installed and a method of calculating the amount of clothes not in the auxiliary washing tub can be applied differently. Accordingly, the washing machine according to the embodiment of the present invention has an advantage in that it is possible to more accurately obtain the respective amount of laundry when the auxiliary washing tub is installed and the amount of laundry when the auxiliary washing tub is not installed.

The control unit 70 may determine whether the auxiliary washing tub 80 is mounted or not mounted based on the detection result of the sensor unit 91 (S105).

When the auxiliary washing tub 80 is installed, the control unit 70 may determine whether the washing course selected through the washing course selection command is the auxiliary washing course (S107).

This is to prevent a case in which the washing machine malfunctions, such as when the laundry included in the auxiliary washing tub 80 is operated in a non-washed washing course even though the auxiliary washing tub 80 is mounted in the washing machine.

If the selected washing course is not the auxiliary washing course, the control unit 70 may output a course selection warning notification (S109).

5 is an exemplary diagram illustrating a method for a washing machine to output a course selection warning notification according to an embodiment of the present invention.

As shown in FIG. 5 , the output unit 93 may output a message indicating that the auxiliary washing tub is installed but the washing course is incorrectly selected. The user may separate the auxiliary washing tub 80 or select a washing course again through the message output to the output unit 93 .

As described above, according to an embodiment of the present invention, there is an advantage in that it is possible to prevent damage to the washing tub and to minimize wastage of energy such as washing water or electric power when the washing machine malfunctions.

Again, FIG. 4 will be described.

The control unit 70 may perform the weight sensing of the bin rotation (S111).

Here, the weight of the tub rotation is detected by rotating both the washing tub 54 and the auxiliary washing tub 55 in a state where no water is supplied, so that the load weight of the washing tub 54, the weight of the auxiliary washing tub 80, and the auxiliary washing tub 80 ) may mean an operation to acquire the total weight of all the load weights.

Specifically, the control unit 70 may control the clutch 64 and the motor 66 to rotate the washing tub 54 , and the auxiliary washing tub 80 mounted inside the washing tub 54 when the washing tub 54 rotates. can rotate together. The control unit 70 waits for a while when the rotational speed (RPM) of the washing tub 54 reaches a preset speed, and then uses ΔRPM/ΔT in the linear deceleration section in which the rotational speed of the washing tub 54 linearly decreases. Thus, the slope value information can be obtained. The control unit 70 sums the load weight of the washing tub 54, the weight of the auxiliary washing tub 80, and the load weight of the auxiliary washing tub 80 from the slope value through the table in which the previously stored slope value information and the weight are matched. You can get the full weight.

As the amount of laundry in the washing tub increases, the load weight of the washing tub 54 may increase, and as the amount of laundry in the auxiliary washing tub increases, the load weight of the auxiliary washing tub 80 may increase.

The weight of the auxiliary washing tub 80 may be preset in the washing machine according to the capacity and type of the washing machine. Alternatively, the weight of the auxiliary washing tub 80 may be detected through the sensor unit 91 . That is, the control unit 70 may store the weight of the auxiliary washing tub 80 in the storage unit 95 .

The control unit 70 may supply water to the washing tub 54 after sensing the weight of the tub rotation (S113).

The control unit 70 may inject a preset amount of washing water into the washing tub 54 in order to detect the amount of laundry in the washing tub.

After supplying water to the washing tub 54, the control unit 70 may perform a pulsator-stirred laundry weight detection (S115).

The sensing of the pulsator agitation weight may refer to an operation of acquiring only the load weight of the washing tub 54 by rotating the pulsator 58 alternately after a certain amount of wash water is put into the washing tub 54 .

Specifically, the controller 70 may control the clutch 64 and the motor 66 to alternately rotate the pulsator 58 in the first direction and the second direction. The control unit 70 waits for a while when the rotational speed of the pulsator 58 reaches a preset speed, and then uses ΔRPM/ΔT in the linear deceleration section in which the rotational speed of the pulsator 58 linearly decreases. It is possible to obtain slope value information. The control unit 70 may obtain only the load weight of the washing tub 54 from the slope value through the table in which the previously stored slope value information and the weight are matched.

The controller 70 may calculate the laundry amount level of the washing tub and the laundry amount level of the auxiliary washing tub (S117).

Specifically, in step S111 , the control unit 70 obtained the total weight of the sum of the load weight of the washing tub 54 , the weight of the auxiliary washing tub 80 , and the load weight of the auxiliary washing tub 80 . The control unit 70 sets the weight of the auxiliary washing tub 80 in advance, and acquires the load weight of the washing tub 54 in step S115. Accordingly, the control unit 70 may obtain the load weight of the auxiliary washing tub 80 by subtracting the pre-stored weight of the auxiliary washing tub 80 and the load weight of the washing tub 54 from the total weight obtained in step S111 .

The storage unit 95 may store a laundry weight table in which the load weight and the laundry weight level are matched. The control unit 70 may obtain the laundry amount level corresponding to the load weight of the auxiliary washing tub 80 from the laundry weight table to obtain the laundry weight level of the auxiliary washing tub 80 . Also, the controller 70 may acquire the laundry amount level of the washing tub by obtaining the laundry amount level corresponding to the load weight of the washing tub 54 obtained in S115 from the laundry weight table.

As such, according to the embodiment of the present invention, there is an advantage in that the amount of laundry included in the washing tub 54 and the amount of laundry included in the auxiliary washing tub 80 can be accurately determined, respectively. In addition, when the amount of laundry in the washing tub and the amount of laundry in the auxiliary washing tub are respectively determined, the amount of washing water and power consumption required for washing can be more accurately determined, thereby minimizing energy waste.

The controller 70 may determine whether the laundry amount level of the washing tub is equal to or greater than a reference level (S119).

When the laundry amount level of the washing tub is equal to or greater than the reference level, the controller 170 may output a warning notification of the laundry amount of the washing tub (S121).

Next, FIG. 6 is an exemplary view for explaining a method of outputting, by a washing machine, a laundry amount warning notification of a washing tub according to an embodiment of the present invention.

The laundry amount warning notification of the washing tub may include a message indicating that the amount of laundry included in the washing tub is large. Accordingly, when the laundry quantity level of the washing tub is equal to or greater than the reference level, the controller 170 may control the output unit 93 to output a message indicating that the amount of laundry contained in the washing tub is large. However, the message output by the output unit 93 shown in FIG. 6 is merely exemplary, and the output unit 93 uses various methods to reduce the amount of laundry contained in the washing tub 54 by the user. A warning notification can be output.

According to this, there is an advantage in that it is possible to minimize the case in which the laundry inserted into the washing tub 54 interferes with the auxiliary washing tub 80 to cause damage to the laundry or damage to the auxiliary washing tub 80 .

Again, FIG. 4 will be described.

If the laundry quantity level of the washing tub is less than the reference level, the controller 70 may set the washing intensity and the number of washes according to the calculated laundry quantity level of the washing tub and the laundry quantity level of the auxiliary washing tub (S123).

The controller 70 may set at least one of the amount of washing water, the amount of detergent, and the washing intensity, based on at least one of the laundry amount level of the washing tub, the laundry amount level of the auxiliary laundry tub, and a laundry course selected by the user. The control unit 70 may control to supply washing water and detergent based on the set amount of washing water, detergent, and washing intensity, and to perform a washing process at a predetermined washing intensity. The control unit 70 controls the amount of washing water and detergent to be put into the washing tub 54 and the amount of washing water and detergent to be put into the auxiliary washing tub 80 according to the laundry quantity level of the washing tub and the laundry quantity level of the auxiliary washing tub. It can be set differently.

The water level sensor 92 may determine whether the wash water is input according to the set amount of wash water.

Meanwhile, when the auxiliary washing tub 80 is not installed as a result of the determination in step S105, the controller 70 may determine whether the selected washing course is a normal course (S131).

If the auxiliary washing tub 80 is not installed but the selected washing course is not a normal course, the control unit 70 may output a course selection warning notification (S109).

Next, FIG. 7 is an exemplary diagram illustrating a method for the washing machine to output a course selection warning notification according to another embodiment of the present invention.

As shown in FIG. 7 , the output unit 93 may output a message indicating that the auxiliary washing tub is not installed, but a washing course is incorrectly selected. The user may install the auxiliary washing tub 80 or select a washing course again through the message output to the output unit 93 . That is, similar to that described with reference to FIG. 5 , the controller 70 may output a course selection warning notification when the selected washing course does not correspond to whether the auxiliary washing tub 80 is installed or not.

Accordingly, the present invention is advantageous in that it is possible to prevent damage to the washing tub and to minimize wastage of energy such as washing water or electric power when the washing machine malfunctions.

Again, FIG. 4 will be described.

When the washing course is selected as the normal course when the auxiliary washing tub 80 is not installed, the control unit 70 may perform the weight sensing of the bin rotation (S133).

This is similar to that described in step S111 , but in this case, the washing tub 54 does not include the auxiliary washing tub 80 . Accordingly, the controller 70 may rotate the washing tub 54 to acquire only the load weight of the washing tub 54 and acquire the laundry amount level of the washing tub 54 . Specifically, the control unit 70 controls the clutch 64 and the motor 66 to rotate the washing tub 54, and calculates the weight corresponding to the slope value information of ΔRPM/ΔT in the linear deceleration section of the rotation speed. , and the laundry amount level corresponding to the obtained weight may be obtained from the laundry weight table.

The controller 70 may determine whether the laundry amount level of the washing tub is equal to or greater than a reference level (S135).

If the laundry quantity level of the washing tub is less than the reference level, the controller 70 may set the washing intensity and the number of washes according to the laundry quantity level of the washing tub (S139).

A detailed description thereof will be omitted since it is similar to that described in step S123.

When the laundry quantity level of the washing tub is equal to or higher than the reference level, the control unit 70 may detect the tub rotation wet cloth (S137).

That is, after supplying washing water to the washing tub 54 , the controller 70 may rotate the washing tub 54 again to detect the amount of laundry in the washing tub. This is to more accurately detect the amount of laundry when the amount of laundry put into the washing tub 54 is large. Accordingly, in some cases, S137 may be omitted.

The controller 70 may set the washing intensity and the number of washes according to the amount of laundry in the washing tub obtained after detecting the rotating tub wet cloth (S139). The control unit 70 may perform a washing process according to the set washing intensity and washing number.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments.

The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

54: washing tub 58: pulsator
70: control unit 80: auxiliary washing tub
91: sensor unit 92: water level detection unit
93: output unit 94: input unit

Claims (9)

laundry tub;
a pulsator formed on the bottom surface of the washing tub to form a rotating water flow in the washing water;
an auxiliary washing tub detachably installed inside the washing tub and separated from the washing tub to perform washing; and
a control unit configured to respectively obtain the laundry amount of the washing tub and the laundry amount of the auxiliary washing tub by using the first weight obtained by rotating the washing tub and the second weight obtained by rotating the pulsator;
the control unit
When the auxiliary washing tub is installed, the washing tub and the pulsator are respectively rotated to obtain the laundry quantity of the washing tub and the laundry quantity of the auxiliary washing tub,
When the auxiliary washing tub is not installed, the washing machine is configured to rotate only the washing tub to obtain the laundry amount of the washing tub. According to claim 1,
the first weight
is the sum of the load weight of the washing tub, the weight of the auxiliary washing tub, and the load weight of the auxiliary washing tub,
the second weight is
A washing machine that is a load weight of the washing tub. 3. The method of claim 2,
Further comprising a storage unit for storing the weight of the auxiliary washing tub,
the control unit
A washing machine for obtaining a load weight of the auxiliary washing tub by subtracting the weight of the auxiliary washing tub and the second weight from the first weight. 4. The method of claim 3,
The storage unit further stores a laundry weight table in which the load weight and the laundry weight level are matched,
the control unit
and obtaining a laundry quantity level corresponding to a load weight of the washing tub and a laundry quantity level corresponding to a load weight of the auxiliary washing tub based on the laundry quantity table. According to claim 1,
The washing machine further comprising a sensor for detecting whether the auxiliary washing tub is installed. delete 6. The method of claim 5,
an input unit for receiving a washing course selection command; and
and an output unit for outputting a course selection warning notification when the washing course selected through the input unit does not match with whether the auxiliary washing tub is installed through the sensor unit. 8. The method of claim 7,
the control unit
A washing machine in which the auxiliary washing tub is mounted, and controlling the output unit to output a warning notification of the amount of laundry in the washing tub when the amount of laundry in the washing tub is greater than or equal to a preset standard. According to claim 1,
the control unit
A washing machine for setting an amount of washing water and a washing intensity based on a laundry amount of the washing tub and a laundry amount of the auxiliary washing tub.

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