KR20200142822A - Washing machine and method of controlling the same - Google Patents

Abstract

The present invention relates to a washing machine and, more specifically, to a method of controlling a washing machine to shorten washing time or have higher washing efficiency in the same washing time. The washing machine comprises: a driving unit connected to a drum for accommodating washing water and laundry to rotate the drum through a rotary shaft; a speed detection unit to detect the rotating speed of the drum; a fabric amount sensing unit to detect the amount of fabric accommodated in the drum; and a control unit to control to increase and decrease the rotating speed of the drum to a first rotating speed to sense the fabric amount of the drum and then increase and decrease the rotating speed of the drum to a second rotating speed, and control the driving unit to rotate the drum in accordance with a plurality of washing motions included in a currently set washing pattern. The control unit increases the rotating speed of the drum to the second rotating speed before the rotation of the drum is stopped if the rotating speed is decreased after the rotating speed is increased to the first rotating speed.

Description

Washing machine and the control method of the washing machine {WASHING MACHINE AND METHOD OF CONTROLLING THE SAME}

The present invention relates to a washing machine, and relates to a method of controlling a washing machine to shorten the washing time or to have a higher washing efficiency at the same washing time.

The washing machine generally determines a washing pattern and a washing time according to the amount of laundry, that is, the amount of cloth, and may perform a washing process during the determined washing time.

Meanwhile, the laundry time of laundry or the amount of laundry that can be processed during the same laundry time is a problem directly related to the performance of the washing machine. Accordingly, a method to further reduce the time required for washing of the same amount of laundry or to increase the amount of laundry that can be washed at the same time, that is, to increase the efficiency of washing, is being actively studied. Actually.

An object of the present invention is to solve the above-described problems and other problems, and to provide a washing machine and a control method of the washing machine that can further shorten the washing time of laundry.

In order to achieve the above or other objects, according to an aspect of the present invention, a washing machine according to an embodiment of the present invention includes a driving unit connected to a drum for receiving laundry and washing water through a rotation shaft to rotate the drum, and the drum A speed detection unit for detecting the rotational speed of the drum, a cloth quantity detection unit for detecting the amount of cloth accommodated in the drum, and accelerating and decelerating the rotational speed of the drum to a first rotational speed to detect the amount of cloth contained in the drum, and then And a control unit for controlling acceleration and deceleration up to a second rotational speed, and for controlling the driving unit to rotate the drum according to a plurality of washing motions included in a currently set washing pattern, wherein the control unit comprises: When it is accelerated to the first rotational speed and then decelerates, the rotational speed is accelerated to the second rotational speed before the rotation of the drum is stopped.

In an embodiment, the control unit accelerates the rotation speed when the rotation speed of the drum to be decelerated is reduced to a preset rotation speed or less, and the preset speed is 20 rpm.

In one embodiment, the first rotational speed is 55rpm, the second rotational speed is 300rpm, and the bag weight detection unit is, when the rotational speed of the drum is accelerated from 0rpm to 55rpm and the drum accelerated to 55rpm It is characterized in that when the rotational speed is decelerated to 20rpm, the primary gun is sensed, and when the rotational speed of the drum is accelerated and decelerated from 120rpm to 300rpm, the secondary gun is sensed.

In an embodiment, the control unit controls the driving unit to continuously detect the second bag amount by accelerating the rotation of the drum before the rotation of the drum decelerating after detecting the first bag amount stops, and the It is characterized in that the determination time of drum stop between the plurality of washing motions is determined differently according to the amount of the laundry detected through the detection of the first and second laundry, which are continuously performed.

In one embodiment, the control unit sets the drum stop determination time as a first time when the detected cloth quantity is below a preset level, and sets the drum stop determination time as a second time when the detected cloth quantity exceeds a preset level. A drum stop determination time is set, and the second time is a time corresponding to twice the first time.

In an embodiment, the control unit compares a first washing motion currently performed among the plurality of washing motions with a second washing motion to be performed after the first washing motion, and according to a comparison result of the washing motion. , After the first washing motion is completed, the second washing motion is performed, or the rotation of the drum is stopped for a predetermined drum stop determination time after driving the first washing motion for a predetermined time, and the drum stop determination It characterized in that the driving unit is controlled so that the second washing motion is performed after time elapses.

In an embodiment, the control unit performs the second washing motion after the first washing motion is completed when the first washing motion and the second washing motion are the same, and the first washing motion and the second washing motion are 2 When the washing motions are different from each other, the drum is stopped for a time when the drum stop is determined between the first washing motion and the second washing motion performed for a predetermined period of time.

According to an aspect of the present invention in order to achieve the above or other objects, a control method of a washing machine according to an embodiment of the present invention detects a primary cloth quantity when the drum rotation speed is accelerated and decelerated to the first rotation speed , A first step of detecting a secondary cloth amount when the rotational speed of the drum is accelerated and decelerated to a second rotational speed, and the currently set washing pattern according to the amount of cloth detected through the first and second cloth detection. A second step of determining a drum stop determination time between a plurality of included washing motions, a first washing motion currently performed among the plurality of washing motions, and a second washing motion to be performed after the first washing motion According to the third step of comparing and the comparison result of the washing motion, the second washing motion is performed after the first washing motion is completed, or the drum is rotated after driving the first washing motion for a predetermined time. And a fourth step of stopping the drum during the drum stop determination time and performing the second washing motion after the drum stop determination time elapses.

In one embodiment, the first step, when the rotational speed of the drum accelerated to the first rotational speed is decelerated when the first bagging is detected, whether the rotational speed of the drum is reduced to a preset minimum rotational speed or less. Step 1-1 of determining whether or not, and step 1-2 of accelerating the rotational speed of the drum before the rotation of the drum is stopped when the rotational speed of the reduced drum is less than the preset rotational speed; And a 1-3 step of performing the secondary laundry weight detection when the accelerated rotational speed of the drum reaches a preset minimum speed for detecting the secondary laundry weight.

In an embodiment, the preset minimum rotational speed is a minimum speed among a rotational speed range of a drum set for detecting the primary bag when the drum accelerated to the first rotational speed is decelerated.

According to at least one of the embodiments of the present invention, the present invention has an effect of shortening the washing time by shortening the time required to detect the amount of laundry, that is, the amount of cloth.

According to at least one of the embodiments of the present invention, the present invention further shortens the time required for washing when the amount of laundry is small by setting a different stop determination time for determining that the drum is stopped according to the detected amount of cloth. It has the effect of making it possible.

According to at least one of the embodiments of the present invention, the present invention requires washing by continuously performing a washing motion according to a result of comparing a washing motion currently being executed with a next washing motion among washing motions included in a set washing pattern. There is an effect that you can shorten the time to become.

1 is a conceptual diagram illustrating a configuration of a washing machine according to an embodiment of the present invention.
2 is a flowchart illustrating a control process of a washing machine according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating a process of detecting a continuous cloth amount during the process of FIG. 2.
FIG. 4 is a flowchart illustrating an operation process of differently setting a stop determination time according to the amount of cloth detected during the process of FIG. 2.
5 is an exemplary view comparing a time required for detecting the amount of cloth in a washing machine according to an embodiment of the present invention and a time required for detecting the amount of cloth in a conventional washing machine.
6 is an exemplary view comparing an example in which an operation according to washing motions is performed in a washing machine according to an embodiment of the present invention and an example in which an operation according to washing motions is performed in a conventional washing machine.

It should be noted that the technical terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the singular expression used in the present specification includes a plurality of expressions unless the context clearly indicates otherwise. In this specification, "consists of." Or "includes." The terms, such as, should not be construed as necessarily including all of the various components or steps described in the specification, and some components or some steps may not be included, or additional components or steps may be included. It should be construed as more inclusive.

In addition, in describing the technology disclosed in the present specification, when it is determined that a detailed description of a related known technology may obscure the gist of the technology disclosed in the present specification, a detailed description thereof will be omitted.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings.

First, FIG. 1 is a conceptual diagram illustrating the configuration of a washing machine 10 according to an embodiment of the present invention.

Referring to FIG. 1, a washing machine 10 according to an embodiment of the present invention includes a control unit 100 and a driving unit 110 connected to the control unit 100, a speed detection unit 130, and a laundry amount detection unit 140. And a memory 150. The components shown in FIG. 1 are not essential to implement a washing machine, and thus, the washing machine described in the present specification may have more or fewer components than the components listed above.

First, the driving unit 110 may be connected to the drum 120 for receiving laundry and washing water. In addition, by being connected to the drum 120 through a rotating shaft, the drum is rotated under the control of the controller 100, so that the laundry can be performed. To this end, the driving unit 110 may include a motor (not shown) for rotating the drum 120. In this case, the rotor of the motor is connected to the drum 120 through the rotation shaft, and the drum 120 may be rotated according to the rotation of the rotor.

In addition, the speed detection unit 130 may detect the rotational speed of the drum 120 from the rotated drum, that is, the position of the rotor. For example, the speed detection unit 130 may detect the rotation speed of the rotor, that is, the drum based on the position of the rotor rotated during a preset time. Here, the position of the rotor may be directly sensed through a position detection sensor or may be estimated based on a current or voltage output from the driving unit 110 through a sensorless method.

Meanwhile, the cloth amount detection unit 140 may detect the amount of cloth accommodated in the drum 120. For example, the cloth amount detection unit 140 may measure the cloth amount by taking a time required to rotate the stopped drum 120 to the first rpm (RPM 1) or a change in the amount of motor current as a factor. Alternatively, the drum 120 may be rotated at a first rpm (RPM 1), and after the motor is turned off, the amount of cloth may be sensed based on a time of decelerating to a predetermined rpm lower than the first rpm (RPM 1).

In addition, the memory 150 stores data supporting various functions of the washing machine 10 according to an embodiment of the present invention. The memory 150 may store data and commands for the operation of the washing machine 10. For example, the memory 150 may store information on various washing modes according to different types of laundry. In addition, information on various washing patterns may be included, and information on washing motions constituting each washing pattern may be included. Here, the washing motion may include an operation motion of the drum 120 in a predetermined time unit of the drum 120. In this case, the operation motion of the drum 120 may include a specific rotational speed or a specific rotational direction of the drum 120, a direction change of the drum 120, and the like.

Meanwhile, the controller 100 may control the overall operation of the washing machine 10. The control unit 100 may determine a load amount such as a rotational speed of a drum added to the laundry, a degree of change of the rotational direction, and an amount of water supplied according to a result of detection by the laundry amount detection unit 140.

If an excessive load is added when the amount of fabric is small, energy waste may be caused, and if a small load is added when the amount of fabric is large, the desired washing purpose is not achieved, and if an excessive load is added, parts inside the washing machine may be damaged. , The controller 100 may determine the load amount according to the sensed amount of cloth and control the driving unit 110 according to the determined load amount to perform a washing process.

On the other hand, the laundry weight detection may be performed through a low-speed laundry weight detection process performed when the rotational speed of the drum 120 is low, and a high-speed laundry weight detection process performed when the rotational speed of the drum 120 is high. In this case, the control unit 100 according to an embodiment of the present invention increases the rotational speed of the drum 120 before the rotation of the drum 120 stops when the low-speed cloth amount detection process is completed to detect the low-speed cloth amount and the high-speed cloth amount. Can be made continuously. That is, the control unit 100 accelerates the rotation of the drum 120 when the rotational speed of the drum 120 is reduced to a preset speed or less after detecting a low-speed cloth quantity, and detects a high-speed cloth quantity. Can be made continuously. Accordingly, it is possible to further shorten the time required for detecting the amount of laundry.

In addition, the control unit 100 may set different stop determination times for determining whether the rotation of the drum 120 is stopped according to the detected amount of cloth. For example, the control unit 100 may set the stop determination time to a first time when the detected cloth amount is less than a certain level, and set the stop determination time to a second time when the detected cloth amount exceeds a certain level. Here, the first time may be shorter than the second time. This is because when the amount of cloth is small, the rotation of the drum 120 may be stopped more quickly than when the amount of cloth is large.

In addition, the control unit 100 may allow the washing motion to be continuously performed according to a result of comparing the washing motion currently in operation with the washing motion of the next operation. For example, if the washing motion that is currently being operated and the next washing motion are the same washing motion, the controller 100 of the washing machine according to an embodiment of the present invention performs two washing motions without stopping and aligning the two washing motions. It can be done continuously. This is because the same washing motion does not require stopping and aligning.

2 is a flowchart illustrating a control process of the washing machine 10 according to an embodiment of the present invention.

Referring to FIG. 2, the control unit 100 of the washing machine 10 according to an embodiment of the present invention may first detect the amount of laundry prior to the washing process (S200). Here, the step S200 may be a continuous laundry detection process in which a low speed laundry detection process and a high speed laundry detection process are continuously performed.

The operation process of step S200 in which the low-speed fabrication detection process and the high-speed fabrication detection process are continuously performed will be described in more detail with reference to FIG. 3 below.

Meanwhile, when the amount of cloth is detected in the step S200, the control unit 100 may set a stop determination time of the drum 120 according to the detected amount of cloth (S202).

Here, the stop determination time of the drum 120 may mean a time for determining that the rotation of the drum 120 is stopped when the motor of the driving unit 110 is turned off. For example, even if the motor is stopped while the drum 120 is rotating, the drum 120 may be stopped after continuing rotation due to inertia for a predetermined time. Accordingly, the controller 100 may determine that the drum 120 has stopped after the predetermined time, that is, the stop determination time has elapsed after the motor is stopped.

On the other hand, as the amount of cloth increases, the drum 120 has a stronger inertia force, and the smaller the amount of cloth, the less inertia force. Accordingly, the time during which the drum 120 rotates according to the inertial force may vary according to the amount of cloth. Accordingly, the control unit 100 of the washing machine 10 according to an embodiment of the present invention may set a different stop determination time of the drum 120 according to the amount of cloth detected in step S200.

The operation of step S202 in which the stop determination time is set differently according to the detected amount of fabric will be described in more detail with reference to FIG. 4 below.

Meanwhile, when the stop determination time is set in step S202, the control unit 100 may start the washing process. In this case, the controller 100 may drive the drum according to the first washing motion included in the currently set washing pattern (S204).

Meanwhile, the washing pattern may include a plurality of washing motions according to a preset order. The plurality of washing motions may include the same or different washing motions.

Meanwhile, when the drum 120 is driven according to the first washing motion, the controller 100 may determine whether the current washing motion (first washing motion) and the next washing motion (second washing motion) are the same. Yes (S206). In addition, if the first washing motion and the second washing motion are the same, the first washing motion is completed, and then the drum 120 may be driven again according to the second washing motion. In this case, the drum 120 may be driven again according to the same washing motion (S208). That is, when the washing motion currently being operated and the washing motion of the next turn are the same, the controller 100 may continuously drive the drum 120 according to the washing motion of the current washing and the washing of the next turn.

On the other hand, as a result of the determination in step S206, if the first washing motion and the second washing motion are not the same, the controller 100 may terminate the driving of the drum 120 according to the end of the time allotted to the first washing motion. Yes (S212). In this case, since each of the washing motions operates in a pre-allocated time unit (motion unit time), when the driving of the drum 120 is terminated according to the expiration of the motion unit time, the first washing motion may be incomplete.

Accordingly, when the rotation of the drum 120 is stopped after the driving of the drum 120 is finished, the controller 100 rearranges the drum 120 (S214) and drives the drum 120 according to the second washing motion. It can be done (S216). Here, the stop determination time for determining whether the rotation of the drum 120 is stopped may be a stop determination time set in step S202.

Meanwhile, when the drum 120 is driven according to the second washing motion through the step S208 or the step S216, the controller 100 determines whether the driving of the drum 120 is completed according to all washing motions included in the currently set washing pattern. Whether or not it can be determined (S210). In addition, if the driving of the drum 120 is completed according to all washing motions, the washing process may be terminated. In this case, other processes after the washing process, such as a dehydration process, may be further performed.

On the other hand, as a result of the determination in step S210, if the driving of the drum 120 is not completed according to all washing motions, the controller 100 may proceed to step S206 again. In this case, the'current washing motion' in step S206, which is determined again, may be the second washing motion. In addition, the'next washing motion' may be a washing motion following the second washing motion, that is, a third washing motion. In addition, the controller 100 may perform step S208 again according to the determination result of step S206, or may perform steps S212 to S216.

Meanwhile, FIG. 3 is a flowchart illustrating a process of detecting a continuous cloth amount during the process of FIG. 2.

Referring to FIG. 3, the control unit 100 according to an exemplary embodiment of the present invention may first perform a low-speed cloth amount detection process (S300). Here, the low-speed gunnery detection is performed while the rotational speed of the drum 120 increases from 0rpm to 55rpm (the acceleration detection zone in the low-speed gunnery detection zone) and while decreasing from 55rpm to 20rpm (deceleration detection zone in the low-speed gunnery detection zone). Can be done.

In addition, while performing the low-speed fabrication detection process, the controller 100 may determine whether the rotational speed of the drum 120 is less than or equal to a speed corresponding to the minimum speed in the deceleration detection section of the low-speed fabrication detection section (S302). ).

To this end, the controller 100 may determine whether an acceleration detection section or a deceleration detection section is based on whether the rotational speed of the drum increases or decreases. In addition, in the case of the deceleration detection section, it may be determined whether the current rotational speed of the drum 120 is less than or equal to the minimum speed of the deceleration detection section of the low-speed pouch detection section, that is, 20 rpm or less.

As a result of the determination in step S302, if the rotational speed of the drum 120 exceeds 20 rpm, which is the minimum speed of the deceleration detection section, even if it is not a deceleration detection section, that is, an acceleration detection section, or a deceleration detection section. , The control unit 100 may proceed to step S300 again to perform a process of detecting a low speed cloth.

On the other hand, as a result of the determination in step S302, if the rotational speed of the drum 120 is decelerating and the rotational speed of the drum 120 is less than 20rpm, which is the minimum speed of the deceleration detection section during low-speed cloth detection, the controller 100 The rotational speed of the drum 120 may be accelerated again to detect the amount of laundry (S304). And when it reaches a preset speed of 120 rpm for high-speed gunnery detection (when the speed of the acceleration detection section for high-speed gunnery detection is from 120rpm to 300rpm, and the speed of the deceleration detection zone is set from 300rpm to 120rpm), high-speed gunnery detection can be performed. (S306).

Therefore, the washing machine 10 according to an embodiment of the present invention continuously performs the low-speed fabrication detection process and the high-speed fabrication detection process without stopping and aligning the drum 120 between the low-speed fabrication detection process and the high-speed fabrication detection process. Can be done. Accordingly, the time required for detecting the bag amount can be further reduced.

Hereinafter, when the low-speed laundry detection process and the high-speed laundry detection process are continuously performed according to the present invention, and when the drum 120 is stopped and aligned between the low-speed laundry detection process and the high-speed laundry detection process in a conventional washing machine. An example of comparing the required time will be described with reference to FIG. 5 below.

Meanwhile, the control unit 100 of the washing machine 10 according to an embodiment of the present invention may set different stop determination times of the drum 120 according to the amount of cloth detected in the step S200.

FIG. 4 is a flowchart illustrating an operation process of differently setting a stop determination time according to the amount of cloth detected during the process of FIG. 2.

Referring to FIG. 4, the controller 100 may determine whether the amount of cloth detected in step S200 is less than or equal to a preset level (S400). In addition, if the detected cloth amount is less than or equal to a preset level, a first time corresponding to the low-level cloth amount may be set as the stop determination time (S402). On the other hand, if the detected cloth quantity exceeds a preset level, a second time corresponding to the high level cloth quantity may be set as the stop determination time (S404).

Here, the first time may be shorter than the second time. For example, when the second time is 5 seconds, the first time may be set to 2.5 seconds. As described above, the washing machine 10 according to an embodiment of the present invention may set a stop determination time of different values according to the detected amount of cloth. Accordingly, as the detected amount of cloth is larger, the time when it is determined that the rotation of the drum 120 is stopped is longer, and as the amount of the detected cloth is smaller, the time when it is determined that the rotation of the drum 120 is stopped may be shortened.

Meanwhile, in FIG. 4, a configuration in which a stop determination time is determined as a first time or a second time by determining only whether or not the detected amount of cloth is less than or equal to a preset level has been described, but this is only an example for convenience of explanation, Of course, it is not limited. That is, it goes without saying that more different stop determination times may be set to correspond respectively to different cloth weight detection results. For example, different stop determination times may correspond to each level of the fabric according to the detection result of the fabric.

Meanwhile, FIG. 5 is an exemplary view comparing the time required for detecting the amount of cloth in the washing machine 10 according to an embodiment of the present invention and the time required for detecting the amount of cloth in a conventional washing machine.

First, FIG. 5A illustrates an example in which a low-speed cloth amount detection 510 and a high-speed cloth amount detection 500 are performed in the washing machine 10 according to an embodiment of the present invention. As shown in (a) of FIG. 5, in the washing machine 10 according to the embodiment of the present invention, when the low-speed cloth amount detection 510 process is performed, the rotational speed of the drum 120 is the lowest speed in the deceleration detection section. If it is decelerated below, by accelerating the drum 120, the low-speed fabrication detection 510 and the high-speed fabrication detection 500 may be continuously performed.

On the other hand, in the case of a conventional washing machine, as shown in Fig. 5(b), after performing the low-speed cloth amount detection 510, the rotation of the drum is completely stopped, and the rotation of the drum is completely stopped. The laundry weight detection 500 may be performed. Accordingly, in the general washing machine, it may take time to decelerate the drum until the rotation of the drum is stopped in the process of detecting the low speed cloth amount 510 and a stop determination time that may determine that the rotation of the drum is stopped.

Therefore, as shown in (b) of FIG. 5, in a conventional washing machine, the time required for detecting the amount of cloth is longer, and thus, the total washing time is longer, whereas in the embodiment of the present invention, the washing machine is used for detecting the amount of cloth. There is an advantage that the overall washing time can be shortened by shortening the time.

Meanwhile, FIG. 6 is an exemplary view comparing an example in which an operation according to washing motions is performed in the washing machine 10 according to an embodiment of the present invention and an example in which an operation according to washing motions is performed in a conventional washing machine. In FIG. 6, the first motion, the second motion, and the third motion may all be the same washing motion.

First, referring to FIG. 6(a) in which washing motions are performed in the washing machine 10 according to an embodiment of the present invention, the washing machine 10 according to the embodiment of the present invention is When the washing motion is the same, as shown in step S208 of FIG. 2, after the currently performed washing motion is completed, the next washing motion may be continuously performed.

Accordingly, as shown in (a) of FIG. 6, the second motion 602 may be performed after the execution of the first motion 601 is completed, and the second motion 602 may be performed after the execution of the second motion 602 is completed. 3 motion 603 may be performed. Therefore, when the currently performed washing motion and the next washing motion are the same, incomplete washing motion does not occur, and there is no need to stop rotation of the drum 120 and align the drum 120. Therefore, as shown in FIG. 6A, the first motion 601, the second motion 602, and the third motion 603 may be continuously performed.

On the other hand, referring to FIG. 6(b) in which washing motions are performed in a conventional washing machine 10, FIG. 6(b) shows an example in which washing motions are performed based on a motion unit time set for each washing motion. Is showing. In this case, when a motion unit time elapses during the execution of the preceding washing motion, the driving of the drum is stopped, so that incomplete washing motion may occur. Accordingly, in the case of a conventional washing machine, a process of aligning the drum between each washing motion is required, and time may be required according to the stopping and aligning process.

That is, a typical washing machine stops and aligns the drum according to the motion unit time regardless of whether the washing motion is the same. Therefore, as shown in (b) of FIG. 6, when the motion unit time of the first motion 601 elapses, the second motion 602 takes the first stop and alignment time 611 in the general washing machine. This can be done. In addition, when the motion unit time of the second motion 602 elapses, the third motion 603 may be performed after the second stop and alignment time 612 is elapsed.

Therefore, as shown in (b) of FIG. 6, in a conventional washing machine, the time according to the execution of the washing motions is longer and the total washing time is increased, whereas in the embodiment of the present invention, the washing machine is There is an advantage that the total washing time can be shortened by shortening the time required.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be carried out without departing from the scope of the present invention.

The present invention described above can be implemented as a computer-readable code in a medium on which a program is recorded. The computer-readable medium includes all types of recording devices storing data that can be read by a computer system. Examples of computer-readable media include HDD (Hard Disk Drive), SSD (Solid State Disk), SDD (Silicon Disk Drive), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. There is also a carrier wave (eg, transmission over the Internet). In addition, the computer may include the control unit 100 of the washing machine 10. Therefore, the detailed description above should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (10)

A driving unit connected to a drum for receiving laundry and washing water through a rotating shaft to rotate the drum;
A speed detector for detecting the rotational speed of the drum;
A cloth amount detection unit detecting the amount of cloth accommodated in the drum; And,
In order to detect the amount of cloth of the drum, the rotational speed of the drum is accelerated and decelerated to a first rotational speed, and then controlled to accelerate and decelerate to a second rotational speed, according to a plurality of washing motions included in the currently set laundry pattern. And a control unit for controlling the driving unit so that the drum rotates,
The control unit,
When the rotational speed of the drum is accelerated to the first rotational speed and then decelerates, the rotational speed is accelerated to the second rotational speed before the rotation of the drum is stopped. The method of claim 1,
The control unit,
When the rotational speed of the decelerated drum decelerates below a preset rotational speed, the rotational speed is accelerated,
The washing machine, characterized in that the preset speed is 20rpm. The method of claim 1,
The first rotation speed is 55 rpm,
The second rotation speed is 300rpm,
The fabric detection unit,
When the rotational speed of the drum is accelerated from 0rpm to 55rpm and the rotational speed of the drum accelerated to 55rpm is reduced to 20rpm, the primary gun is sensed, and the rotational speed of the drum is accelerated and decelerated from 120rpm to 300rpm. A washing machine, characterized in that it detects the secondary amount of cloth at the time. The method of claim 3, wherein the control unit,
Controlling the driving unit to accelerate the rotation of the drum before the rotation of the drum that decelerates after sensing the first bag amount is stopped so that the second bag amount is continuously detected,
The washing machine according to claim 1, wherein the determination time of stopping the drum between the plurality of washing motions is determined differently according to the amount of the laundry detected through the detection of the first and second laundry amounts that are continuously performed. The method of claim 4, wherein the control unit,
When the detected amount of fabric is less than a preset level, the drum stop determination time is set as a first time, and when the detected amount of fabric exceeds a preset level, the drum stop determination time is set as a second time,
The second time,
Washing machine, characterized in that the time corresponding to twice the first time. The method of claim 1, wherein the control unit,
Compare a first washing motion currently performed among the plurality of washing motions with a second washing motion to be performed after the first washing motion,
According to the comparison result of the washing motion, the second washing motion is performed after the first washing motion is completed, or the rotation of the drum after driving the first washing motion for a predetermined time is determined by a predetermined drum stop determination time. And controlling the driving unit to perform the second washing motion after the drum stop determination time has elapsed. The method of claim 6, wherein the control unit,
When the first washing motion and the second washing motion are the same, the second washing motion is performed after the first washing motion is completed,
When the first washing motion and the second washing motion are different from each other, the drum is stopped between the first washing motion and the second washing motion performed for a predetermined period of time for a time when the drum stop is determined. A first step of sensing a primary cloth quantity when the rotational speed of the drum is accelerated and decelerated to a first rotational speed, and sensing a secondary cloth quantity when the rotational speed of the drum is accelerated and decelerated to a second rotational speed;
A second step of determining a drum stop determination time between a plurality of washing motions included in a currently set washing pattern according to the amount of cloth detected through the detection of the first and second cloths;
A third step of comparing a first washing motion currently performed among the plurality of washing motions with a second washing motion to be performed after the first washing motion; And,
According to the comparison result of the washing motion, the second washing motion is performed after the first washing motion is completed, or the rotation of the drum after driving the first washing motion for a predetermined period of time is performed during the drum stop determination time. And a fourth step of stopping and performing the second washing motion after the time for determining the drum stop has elapsed. The method of claim 8, wherein the first step,
A step 1-1 of determining whether or not the rotational speed of the drum is reduced to a preset minimum rotational speed or less when the rotational speed of the drum accelerated to the first rotational speed is decelerated when the first bag is detected;
A 1-2 step of accelerating the rotational speed of the drum before the rotation of the drum is stopped when the rotational speed of the reduced drum is less than the preset rotational speed;
And a 1-3 step of detecting the secondary laundry volume when the accelerated rotational speed of the drum reaches a preset minimum speed for detecting the secondary laundry volume. The method of claim 9,
The preset minimum rotation speed is,
The control method of a washing machine, characterized in that, when the drum accelerated at the first rotational speed is decelerated, it is the lowest speed among the rotational speed ranges of the drum set for detecting the primary laundry amount.

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