WO2023096329A1 - Clothing processing apparatus and control method therefor - Google Patents

Abstract

A clothing processing (laundry treating) apparatus and a control method therefor are disclosed, and the clothing processing apparatus according to an embodiment of the present invention comprises: a cabinet; a tub; a drum; and a controller provided to control rotation of the drum and perform a spin-drying cycle of clothes, wherein: the spin-drying cycle includes a first spin-drying cycle and a second spin-drying cycle; in the first spin-drying cycle, the rpm of the drum decreases immediately after increasing up to a peak rpm set in the controller, so as to perform a peak motion of the drum; and in the second spin-drying cycle, the rpm of the drum increases up to a hold rpm set in the controller, is kept at the hold rpm for a predetermined time, and then decreases, so as to perform a hold motion of the drum.

Description

Clothes handling device and its control method

The present invention relates to a laundry treatment apparatus and a control method thereof, and relates to a laundry treatment apparatus performing a spin-drying operation to remove moisture from clothes.

A clothes treatment device is a device that performs various treatment processes on clothes, such as washing or drying clothes, and includes a washing machine, a dryer, a refresher (styler), and the like.

Laundry handling apparatuses may be classified into a top loading method and a front loading method based on a method of putting laundry into a drum, and may include a cabinet forming an external appearance.

A washing machine or the like capable of washing clothes may put laundry such as clothes and bedding into a drum to remove contamination from the laundry. The washing process of clothes may include a washing process, a rinsing process, a spin-drying process, a drying process, and the like.

The dehydration process of the clothes may be performed for the purpose of removing moisture present in the clothes. For example, in the spin-drying cycle of the clothes, water may be physically removed from the clothes by providing a centrifugal force to the clothes through rotation of the drum.

Related literature KR 10-1997-0011147 A1 discloses a laundry treatment apparatus that performs a dehydration process. The clothes handling apparatus in the related literature removes moisture from clothes through high-speed rotation of a drum.

However, the rotation of the drum to remove moisture from the clothes may cause a phenomenon in which the clothes adhere to the inner circumferential surface of the drum so that they are difficult to fall.

Specifically, the centrifugal force generated when the drum rotates in the dehydration cycle may act as a force pushing the clothes inside the drum in the radial direction of the drum. That is, clothes can be pressed toward the inner circumferential surface of the drum by centrifugal force.

Moisture present in clothes may have viscosity due to surface tension and the like, and the characteristics of such moisture may cause adhesion between the clothes and the inner circumferential surface of the drum and between the clothes.

In addition, tangles between clothes may occur during the rotation of the drum, and accordingly, the adhesion phenomenon may be further intensified. Furthermore, a plurality of through-holes for passing water may exist on the circumferential surface of the drum, and fibers constituting clothes are deformed during the dehydration process and may be left in the form of being inserted into the through-holes, resulting in bag adhesion. It can be.

On the other hand, the trapping phenomenon caused by the dehydration process may prevent the smooth discharge of water separated from the clothes, and may cause inconvenience to the user in taking out the clothes after the treatment process of the clothes is finished.

Furthermore, the laundry treatment apparatus may further perform a drying operation after the dehydration operation. The drying process is a process of removing moisture through vaporization by applying heat to the inside of the drum, and the surface area to which heat is provided to clothes acts as an important factor in the drying efficiency according to the drying cycle.

As the adhesion of clothes intensifies due to the dehydration operation, heat is applied to the entire clothes or the surface area for vaporizing moisture is reduced, and thus drying efficiency may be greatly reduced.

Therefore, it is the present technical field to increase the dehydration efficiency of the dehydration process by minimizing the adhesion of clothes due to the dehydration process, reduce user's inconvenience, and furthermore, effectively improve the drying efficiency of the drying process that can be performed after the dehydration process. becomes an important task in

Embodiments of the present invention are intended to provide a laundry treatment apparatus capable of effectively dewatering laundry and a control method therefor.

In addition, embodiments of the present invention are intended to provide a laundry treatment apparatus and a control method capable of effectively improving the adhesion of laundry due to a dehydration process of the laundry.

In addition, embodiments of the present invention are intended to provide a laundry treatment apparatus and a control method capable of effectively improving dehydration efficiency in a dehydration process.

In addition, embodiments of the present invention are intended to provide a laundry treatment apparatus and a control method through which a user can conveniently take out clothes after a spin-drying cycle is finished.

In addition, embodiments of the present invention are intended to provide a laundry treatment apparatus and a control method capable of effectively improving the drying efficiency of a drying cycle performed after a dehydration cycle.

The laundry treatment apparatus according to an embodiment of the present invention may perform a first spin cycle and a second spin cycle among spin spin cycles, the peak motion of the drum is performed in the first spin cycle, and the drum is maintained in the second spin cycle. motion is performed.

In the peak motion of the drum, based on the maximum RPM of the drum, the RPM of the drum may increase to the maximum RPM before reaching the maximum RPM, and then the RPM of the drum may decrease immediately after reaching the maximum RPM.

That is, in the peak motion of the drum, the RPM of the drum may be a motion of decelerating again after reaching the maximum RPM instantaneously through rotational acceleration. The peak motion of the drum can minimize the centrifugal force acting on the clothes and the resulting bag adhesion phenomenon by eliminating the maximum RPM maintenance time.

The maintenance motion of the drum is a motion in which the maximum RPM of the drum is maintained for a predetermined period of time. That is, in the maintenance motion, the RPM of the drum increases toward the maximum RPM, the maximum RPM is maintained for a predetermined period of time, and the RPM of the drum may decrease again after the predetermined period of time.

That is, the maintenance motion of the drum is a motion in which the maximum RPM of the drum is maintained for a certain period of time, and accordingly, the spin-drying effect on clothes can be maximized.

One embodiment of the present invention is to remove the moisture while minimizing deformation of the clothing, that is, the trapping phenomenon of the clothing, through a peak motion in a state in which the clothing is highly deformable due to excessive moisture contained in the clothing, and removes the moisture contained in the clothing. When this is reduced below a certain level, the moisture removal rate of the clothes is maximized through the maintenance motion of the drum, so that the adhesion of the clothes can be suppressed.

The laundry treatment apparatus according to one embodiment of the present invention includes a cabinet, a tub, a drum, and a control unit. A tub is provided inside the cabinet to accommodate water, a drum is rotatably provided inside the tub to accommodate clothes, and a plurality of through holes through which water accommodated in the tub passes.

The control unit is provided to control the rotation of the drum and to perform the spin-drying process of the clothes.

The dehydration process includes a first dehydration process and a second dehydration process. In the first dehydration cycle, the RPM of the drum increases to the peak RPM set in the control unit and immediately decreases, thereby performing a peak motion of the drum.

In the second spin-drying cycle, the RPM of the drum increases to the maintenance RPM set in the control unit, maintains the RPM for a predetermined time, and then decreases to perform the maintenance motion of the drum.

The driving unit may be provided inside the cabinet and may be connected to the drum to provide rotational force. The control unit may control the driving unit to adjust the RPM of the drum.

In the first dehydration cycle, the control unit controls rotation of the drum so that the RPM of the drum reaches the peak RPM after a first acceleration section in which the RPM of the drum increases to the peak RPM and the first acceleration section. At the same time, it may be provided to perform a reduced first deceleration section.

In the second dehydration cycle, the control unit controls rotation of the drum to maintain a second acceleration period in which the RPM of the drum increases to the maintenance RPM, and after the second acceleration period, the RPM of the drum maintains the maintenance RPM. After the maintenance period and the maintenance period, it may be provided to perform a second deceleration period in which the RPM of the drum is reduced from the maintenance RPM.

The maintenance RPM may have a higher value than the peak RPM. In the first spin-drying operation, the drum repeatedly performs the unwinding motion after the peak motion, and in the unwinding motion, the drum may be rotated at a lower RPM than the peak RPM and then stopped.

The first dehydration process includes a 1-1 dehydration process and a 1-2 dehydration process, and in the 1-1 dehydration process, the RPM of the drum decreases immediately after rising to the first peak RPM, so that the first dehydration process of the drum The peak motion may be performed, and in the 1-2 dehydration cycle, the RPM of the drum increases immediately after rising to a second peak RPM different from the first peak RPM, and the second peak motion of the drum may be performed.

The second peak RPM may be set to have a higher value than the first peak RPM. The maintenance RPM may be set to have a higher value than the second peak RPM.

In the 1-1 dehydration cycle, the drum may rotate at a lower than the first peak RPM after performing the first peak motion, and then repeatedly perform a stopped unfolding motion.

The control unit may control rotation of the drum so that the drum performs the unwinding motion after each of the first peak motion, the second peak motion, and the sustaining motion is performed.

The control unit may set the first peak RPM such that the moisture content of the clothes falls within a predetermined first range in the first peak RPM rotation state of the drum in the 1-1 dehydration cycle.

The controller may set the second peak RPM so that the moisture content of the clothes falls within a second range lower than the first range in the second peak RPM rotation state of the drum in the first-second dehydration cycle.

The measuring unit may be provided inside the cabinet to measure the moisture content of the clothes or the temperature of the fluid. The control unit may determine the moisture content of the clothing through the measurement value of the measuring unit.

The control unit may adjust the peak RPM according to the moisture content of the clothes and set a constant maintenance RPM regardless of the moisture content of the clothes. The predetermined time during which the maintenance RPM is maintained in the second dehydration stroke may be set longer than an execution time of the first peak motion or the second peak motion.

The predetermined time during which the maintenance RPM is maintained in the second dehydration cycle may be set to be longer than an execution time of the 1-1 dehydration cycle or the 1-2 dehydration cycle.

The time required for the RPM of the drum to reach the first peak RPM in the 1-1 dehydration cycle is the time required for the RPM of the drum to reach the second peak RPM in the 1-2 dehydration cycle. time may be shorter.

The drying unit may be provided inside the cabinet and increase the temperature inside the tub. The control unit may be provided to perform a drying operation of the clothes after performing the spin-drying operation.

Meanwhile, a method for controlling a laundry treatment apparatus according to an embodiment of the present invention includes performing a first spin cycle and a second spin cycle. In the step of performing the first dehydration cycle, the drum's peak motion is performed by decreasing immediately after the RPM of the drum increases to the peak RPM set in the control unit.

In the step of performing the second dehydration stroke, after the step of performing the first dehydration stroke, the RPM of the drum increases to the maintenance RPM set in the control unit, maintains the RPM for a predetermined time, and then decreases to perform the maintenance motion of the drum. .

The first dehydration stroke performing step may include a 1-1 dehydration stroke performing step and a 1-2 dehydration stroke performing step. In the step of performing the 1-1 dehydration stroke, the RPM of the drum is decreased immediately after increasing to the first peak RPM, so that the first peak motion of the drum is performed, and in the step of performing the 1-2 dehydration stroke, the RPM of the drum is A second peak motion of the drum may be performed by decreasing immediately after increasing to a second peak RPM higher than the first peak RPM.

After each of the first peak motion, the second peak motion, and the maintenance motion is performed, the control unit rotates the drum at a popping RPM lower than the first peak RPM, and then stops the popping motion of the drum. It is possible to control the rotation of the drum so that this is performed.

Embodiments of the present invention may provide a laundry treatment apparatus capable of effectively performing a laundry dehydration process and a control method thereof.

In addition, embodiments of the present invention may provide a laundry treatment apparatus and a control method capable of effectively improving a phenomenon in which clothes adhere due to a spin-drying operation of the clothes.

In addition, embodiments of the present invention may provide a laundry treatment apparatus and a control method capable of effectively improving dehydration efficiency for a dehydration operation.

In addition, embodiments of the present invention may provide a laundry treatment apparatus and a control method for allowing a user to conveniently withdraw clothes after a spin-drying cycle is finished.

In addition, embodiments of the present invention can provide a laundry treatment apparatus and a control method capable of effectively improving the drying efficiency of a drying cycle performed after a dehydration cycle.

1 is a front perspective view showing the inside of a laundry treatment apparatus according to an embodiment of the present invention.

2 is a rear perspective view showing the inside of a laundry treatment apparatus according to an embodiment of the present invention.

3 is a cross-sectional view showing the inside of a laundry treatment apparatus according to an embodiment of the present invention.

4 is a conceptual diagram showing a process of processing clothes according to an embodiment of the present invention.

5 is a conceptual diagram showing a dehydration process for clothes in one embodiment of the present invention.

6 is a graph showing changes in drum RPM in a dehydration process in which the peak motion of the drum is omitted in one embodiment of the present invention.

7 is a graph showing changes in drum RPM in a dehydration process including a peak motion of the drum in one embodiment of the present invention.

8 is a diagram conceptually dividing and showing moisture contained in clothes in one embodiment of the present invention.

9 is a view schematically showing clothes caught in the through-hole of the drum during the spin-drying operation in one embodiment of the present invention.

10 is a graph showing whether or not an adhesion phenomenon occurs according to a change in the first peak RPM during the 1-1st dehydration stroke in one embodiment of the present invention.

11 is a graph showing whether or not an adhesion phenomenon occurs according to a change in the second peak RPM during the 1st-2nd dehydration strokes in one embodiment of the present invention.

12 is a graph showing changes in the moisture content of clothes according to the maintenance time of the maintenance RPM during the second dehydration cycle in one embodiment of the present invention.

13 is a flowchart illustrating a control method of a laundry treatment apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention.

However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

In this specification, redundant descriptions of the same components are omitted.

In addition, in this specification, when a component is referred to as being 'connected' or 'connected' to another component, it may be directly connected or connected to the other component, but another component in the middle It should be understood that may exist. On the other hand, in this specification, when a component is referred to as 'directly connected' or 'directly connected' to another component, it should be understood that no other component exists in the middle.

In addition, terms used in this specification are only used to describe specific embodiments and are not intended to limit the present invention.

Also, in this specification, a singular expression may include a plurality of expressions unless the context clearly indicates otherwise.

In addition, in this specification, terms such as 'include' or 'having' are only intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more It should be understood that the presence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Also in this specification, the term 'and/or' includes a combination of a plurality of listed items or any item among a plurality of listed items. In this specification, 'A or B' may include 'A', 'B', or 'both A and B'.

1 is a perspective view of the inside of a laundry treatment apparatus 1 according to an embodiment of the present invention viewed from the front. An embodiment of the present invention includes a cabinet 10, and the cabinet 10 provides a space in which the tub 20 and the drum 30 are disposed.

The cabinet 10 may include an inner space, surround the space, and be separated from the outside. 1 shows a transparent cabinet 10 to show the inside of the laundry treatment apparatus 1 .

The cabinet 10 may form the exterior of the laundry treatment apparatus 1 and may include an inlet through which clothes are put into the interior. FIG. 1 shows a cabinet 10 provided with the inlet toward the user, that is, toward the front.

The tub 20 is provided inside the cabinet 10 and may store water. The tub 20 may include a tub opening 25 that opens toward the inlet. The tub opening 25 communicates with the input port so that clothes input by the user can be transferred into the tub 20 .

The water supply unit 40 may receive water by being connected to an external water supply source existing outside the cabinet 10 . The water supply unit 40 may directly supply water to the tub 20 or supply water to the tub 20 through the detergent supply unit 70 . The drainage unit 50 may be provided to selectively discharge water stored in the tub 20 to the outside of the tub 20 .

The drum 30 may be provided inside the tub 20 . The drum 30 may be installed to be rotatable, and may be rotated by receiving rotational force from a driving unit 80 to be described later. The drum 30 may be provided to accommodate clothes inside the tub 20 .

The drum 30 may include a drum opening 35 facing the tub opening 25, and clothes introduced through the inlet of the cabinet 10 pass through the tub opening 25 and the drum opening 35 to the drum ( 30) can be accommodated inside.

The tub 20 and the drum 30 may have a cylindrical shape, and the tub opening 25 and the drum opening 35 may open toward the front. That is, one embodiment of the present invention may be a front loader type in which the rotating shaft of the drum 30 is substantially parallel to the ground and the driving unit 80 is disposed at the rear of the tub 20 . However, it is not necessarily limited thereto and may be provided as a top loader type if necessary.

One embodiment of the present invention may include a drying unit 90 as needed. That is, the laundry treatment apparatus 1 according to an embodiment of the present invention supplies heat to the inside of the tub 20 or the drum 30 as well as the washing process P1 and the rinsing process P2 of the clothes using wash water. It may also be provided to perform a drying process (P4) for vaporizing and removing moisture contained in the clothes.

An embodiment of the present invention may include a control unit 100, and the control unit 100 includes various components such as the water supply unit 40, the driving unit 80, the drainage unit 50, and the drying unit 90 It is connected to and can control the above components. The number and location of the controller 100 may vary.

The controller 100 may store performance information for the washing operation P1, the rinsing operation P2, the spin-drying operation P3, and/or the drying operation P4 in advance, and at least one operation may be performed according to a user's request. can be performed.

A control panel 60 may be provided in the cabinet 10 . The control panel 60 may include a plurality of buttons operable by a user, and may include a screen output unit capable of outputting visual information and/or a sound output unit capable of outputting auditory information.

The control panel 60 may be connected to the control unit 100, and the control panel 60 may transmit an operation signal generated by a user's operation to the control unit 100, and the control unit 100 may respond to the operation signal. Based on this, the treatment process of clothes can be performed. The control unit 100 may provide information on the processing process to the user through the control panel 60 .

Meanwhile, FIG. 2 shows a perspective view of the inside of the laundry treatment apparatus 1 according to an embodiment of the present invention viewed from the rear.

The water supply unit 40 may be disposed on the rear side of the cabinet 10 . The water supply unit 40 penetrates the rear panel of the cabinet 10 and may be connected to an external water supply source. The detergent supply unit 70 may include a space in which detergent is stored, and may deliver detergent together with water supplied from the water supply unit 40 to the inside of the tub 20 .

The drying unit 90 is a means for supplying heat to the inside of the tub 20 and may be provided in various types and shapes. Referring to FIG. 2 , the drying unit 90 according to an embodiment of the present invention may supply heated air, that is, hot air, into the tub 20 and/or the drum 30 .

The drying unit 90 may suck air from inside or outside the tub 20 to heat it, and then supply the air to the inside of the tub 20 . The drying unit 90 may include a blower 92 including a motor and a fan to flow hot air, and may include a flow channel 94 through which air flows, and the flow channel 94 may flow. It may include a heater 96 for heating the air to be heated.

The outlet end of the flow channel 94 communicates with the inside of the tub 20 so that hot air can be supplied to the inside of the tub 20, and the drying process P4 is performed by evaporating and removing moisture from the clothes heated by the hot air. It can be.

Meanwhile, FIG. 3 is a cross-sectional view showing the inside of the laundry treatment apparatus 1 according to an embodiment of the present invention.

The above-described water supply unit 40 may be connected to an external water supply source to receive water, control the flow of water through the water supply valve 42, and flow water through the water supply pipe 44 to eventually reach the tub ( 20) can be supplied.

The detergent supply unit 70 may be connected to the water supply unit 40 through a water supply pipe 44 or the like. The detergent supply unit 70 may store detergent for the washing process P1 of clothes. The detergent supply unit 70 may supply water and detergent delivered from the water supply unit 40 into the tub 20 together.

The tub 20 may contain water therein and may include a tub opening 25 that opens toward an inlet of the cabinet 10 . The tub 20 may include a front surface of the tub 20 , a circumferential surface of the tub 20 , and a rear surface of the tub 20 , and the tub opening 25 may be located on the front surface of the tub 20 .

One embodiment of the present invention may include a gasket 18 sealing between the inlet and the tub opening 25 . Water contained in the tub 20 may be prevented from leaking out of the tub 20 through the tub opening 25 by the gasket 18 .

A door 15 may be provided in the cabinet 10 . The door 15 may be rotatably provided on the front surface of the cabinet 10 and may be provided to open and close the input port according to the rotational position.

The tub opening 25 may be blocked from the outside of the tub 20 by the door 15 and the gasket 18, and thus the tub opening ( 25) can prevent water from leaking to the outside.

The drum 30 may be provided inside the tub 20 and may be provided to be rotatable with a rotational axis substantially parallel to the ground. However, if necessary, the axis of rotation may be defined to be inclined upward toward the front.

The drum 30 may include a front surface of the drum 30, a circumferential surface of the drum 30, and a rear surface of the drum 30. The front surface of the drum 30 and the rear surface of the drum 30 may be connected through the circumferential surface of the drum 30 . The aforementioned drum opening 35 may be positioned on the front surface of the drum 30 , and a plurality of through holes 38 through which water contained in the tub 20 passes may be formed on the circumferential surface of the drum 30 .

Accordingly, when water is stored inside the tub 20, the water also exists inside the drum 30, and clothes accommodated inside the drum 30 may be submerged in the water. The driving unit 80 may be fixed to the tub 20 or the cabinet 10 , and a drive shaft of the driving unit 80 may pass through the rear surface of the tub 20 and be connected to the rear surface of the drum 30 .

The drain unit 50 may include a drain pipe 54 connected to the tub 20 and may include a drain pump 52 generating a flow of water discharged from the tub 20 . The drying unit 90 may discharge air inside the tub 20 to the outside, heat it, and then supply the air to the inside of the tub 20 again.

Meanwhile, FIG. 4 conceptually illustrates a plurality of processes included in a process of processing clothes according to an embodiment of the present invention. The clothes treatment process may include at least one of a washing process (P1), a rinsing process (P2), a spin-drying process (P3), and a drying process (P4).

The plurality of operations may be performed by the control unit 100 . The control unit 100 may supply water and detergent into the tub 20 by controlling the water supply unit 40 and the detergent supply unit 70 in the washing operation P1, and may control the drive unit 80 to supply the drum 30. can be rotated to remove contaminants from clothing.

In the rinsing cycle (P2), the control unit 100 controls the water supply unit 40 to supply water into the tub 20 to separate detergent and contaminants from clothes, and controls the drainage unit 50 to supply water to the inside of the tub 20. Water may be discharged from the tub 20 .

In the spin-drying operation (P3), the control unit 100 may control rotation of the drum 30 and spin-dry the clothes. In the spin-drying operation (P3), the control unit 100 controls the driving unit 80 to rotate the drum 30, and centrifugal force can be applied to the clothes accommodated in the drum 30 by the rotation of the drum 30, and the centrifugal force As a result, moisture contained in the clothes can be separated from the clothes.

Moisture separated from the clothes in the dehydration process (P3) can be moved to the outside of the drum 30 through the through hole 38 of the drum 30, and will be moved to the outside of the tub 20 through the drainage part 50. can

In the drying process (P4), the control unit 100 controls the drying unit 90 to supply heat to the inside of the tub 20, and accordingly, the moisture contained in the clothes is heated and moved into the air while causing a phase change to the clothes. can be removed from

The above-described drying unit 90 was a method of raising the temperature of the air inside the tub 20 through a heater 96 heated with electric power and then supplying the air to the inside of the tub 20 again, but is not limited thereto, and heating of the air is not limited thereto. For this, a heat pump type heater 96 using a fluid may be provided, or a type that directly heats the inside of the tub 20 without using air as a medium may be used.

Meanwhile, FIG. 5 conceptually shows a dehydration process (P3) that can be performed in one embodiment of the present invention. In one embodiment of the present invention, the dehydration process (P3) may include a first dehydration process (P31) and a second dehydration process (P32). The first dehydration cycle P31 may include a 1-1 dehydration cycle P311 and a 1-2 dehydration cycle P312.

In the first dehydration process (P31), the RPM of the drum 30 increases to the peak RPM (R1) set in the control unit 100 and immediately decreases, so that the peak motion (M1) of the drum 30 can be performed. .

In addition, in the second dehydration cycle (P32), after the RPM of the drum 30 increases to the maintenance RPM (R2) set in the control unit 100, the maintenance RPM (R2) is maintained for a predetermined time (TC), and then By decreasing, the maintenance motion M2 of the drum 30 may be performed.

In one embodiment of the present invention, the driving unit 80 is provided inside the cabinet 10 and is connected to the drum 30 to provide rotational force. The RPM of the drum 30 may be adjusted by controlling the drive unit 80 .

Meanwhile, FIG. 6 shows a graph showing the change in RPM of the drum 30 in the dehydration process P3 in which the peak motion M1 is omitted. In the graph of FIG. 6, the horizontal axis is the time axis, and the vertical axis is the RPM of the drum 30.

The spin-drying process (P3) may be performed after the washing process (P1) and the rinsing process (P2). In the spin-drying process (P3), while the drum 30 rotates, water can be separated and removed from the clothes using centrifugal force.

The dehydration process (P3) may include an acceleration period (I), a maintenance period (C), and a deceleration period (D) of the drum 30 RPM. In the dewatering operation (P3), the motion of the drum 30 including at least one of the acceleration period (I), the maintenance period (C), and the deceleration period (D) may be performed.

In the acceleration section (I), the drum 30 RPM may be gradually increased. In the acceleration section (I), the control unit 100 may increase the RPM of the drum 30 by controlling the driving unit 80. In the maintenance period (C), the drum 30 RPM may be maintained constant. In the maintenance period (C), the control unit 100 may control the driving unit 80 to maintain the drum 30 RPM constant. In the deceleration section (D), the drum 30 RPM may be gradually reduced. In the deceleration period (D), the control unit 100 may control the drive unit 80 to reduce the drum 30 RPM.

In the spin-drying operation P3, spin-drying of clothes may proceed through the motion of the drum 30 including high RPM rotation. However, as the holding time of the holding period C, in which relatively high RPM is maintained for dehydration of clothes, increases, the possibility of causing the clothes sticking phenomenon increases.

In clothes containing moisture, the ease of deformation of the fibers F may be increased. That is, clothes having a moisture content higher than a certain level can easily change the fibers F by external pressure and can be easily pressed against the circumferential surface of the drum 30 by centrifugal force.

In the present invention, the trapping phenomenon means that the clothes are attached to the circumferential surface of the drum 30 by the centrifugal force of the drum 30 and do not easily fall off.

The adhesion phenomenon may be due to the ease of deformation of the clothing or may be due to viscosity based on the surface tension of moisture present in the clothing. The adhesion phenomenon may cause adhesion between clothes and the circumferential surface of the drum 30 and between clothes, and may cause inconvenience to the user in withdrawing clothes after the spin-drying operation (P3) ends, and may reduce dehydration efficiency or Drying efficiency of the drying process P4, which may be performed after the dehydration process P3, may be reduced.

Specifically, through-holes 38 may be provided on the circumferential surface of the drum 30 to allow water to move into and out of the drum 30, and clothes of a certain level or higher may be attached to the circumferential surface of the drum 30. In this case, it is not easy to discharge water through the through hole 38, and dehydration efficiency may be reduced.

In addition, when the drying process P4 is performed after the dehydration process P3, the surface area exposed to the air from the clothes may affect the drying efficiency due to the characteristics of the drying process P4 using the phase change of moisture.

However, when the clothes are tangled with each other and adhered to the circumferential surface of the drum 30 due to the trapping phenomenon, the exposed surface area of the clothes can be greatly reduced compared to the amount of clothes, so that moisture from the clothes is evaporated and vaporized can be disadvantageous to

Accordingly, in one embodiment of the present invention, the dehydration process P3 is performed in a first dehydration process P31 and a second dehydration process P32 so as to prevent or suppress the adhesion of clothes during the dehydration process P3. In the first dehydration cycle (P31), the peak motion (M1) of the drum 30 for removing moisture from the clothes may be performed while suppressing the adhesion phenomenon.

7 is a graph showing the change in RPM of the drum 30 in the dehydration cycle P3 including the first dehydration cycle P31 and the second spin cycle P32 in one embodiment of the present invention. In the graph of FIG. 7, the horizontal axis represents time and the vertical axis represents RPM.

As described above, in one embodiment of the present invention, the dehydration process (P3) includes a first dehydration process (P31) and a second dehydration process (P32), and in the first dehydration process (P31), the drum 30 The peak motion M1 is performed, and the maintenance motion M2 of the drum 30 may be performed in the second spin-drying process P32.

In one embodiment of the present invention, the peak motion (M1) of the drum 30 means a motion in which the drum 30 increases from a stop state or similar state and then decreases again immediately after reaching the maximum RPM.

That is, in the peak motion M1 of the drum 30, the RPM of the drum 30 may be gradually increased to reach the maximum RPM and simultaneously decreased. In the peak motion M1 of the drum 30, the maintenance period C in which the maximum RPM of the drum 30 is maintained may not exist.

The peak motion (M1) may have a peak point (K) at which the maximum RPM is recorded instead of the maintenance period (C). It can be understood that the holding time of the peak point (K) does not exist, and there is an acceleration section (I) immediately before the peak point (K) centered on the peak point (K), and a deceleration section immediately after the peak point (K). (D) may be present.

Here, the meaning that the maintenance period (C) does not exist means that the maintenance time of the maximum RPM based on the absolute time is too short to determine the maintenance period (C), as well as the rotation of the drum 30 if necessary. It may also be understood to include a physically unavoidable holding time in consideration of inertia.

For example, in one embodiment of the present invention, the peak RPM (R1) corresponding to the maximum RPM among the peak motions (M1) of the drum 30 is observed for 1 second or less, 10 seconds or less, or 1 minute or less. It could be.

In one embodiment of the present invention, in implementing the peak motion (M1) of the drum 30, the control unit 100, when the RPM of the drum 30 reaches the peak RPM (R1), the control unit 100 no longer drum (30) Actions to increase or maintain RPM may not be taken.

In the dehydration process (P3) of clothes, one of the important causes of occurrence of the trapping phenomenon is the continuous effect of high RPM. The clothes at the beginning of the dehydration process (P3) may be in a state of high deformability by containing a certain level or more of moisture.

In this case, as the maintenance period (C) in which the RPM of the drum 30 is kept constant increases, the clothes gradually have the shape of the circumferential surface of the drum 30, for example, the through hole formed on the circumferential surface of the drum 30. It is deformed into a shape corresponding to (38), so that a part of it is inserted into the through hole 38 from a microscopic point of view, and the possibility of causing a trapping phenomenon may increase.

On the other hand, in the acceleration section (I) in which the RPM of the drum 30 is accelerated to increase, the water separation efficiency due to the difference in inertia between clothes and water can be relatively high. ), it is possible to improve the removal rate of moisture while minimizing the trapping phenomenon by using the peak motion (M1) in which the holding period (C) is omitted immediately after the acceleration period (I) followed by the deceleration period (D).

On the other hand, in one embodiment of the present invention, the maintenance motion (M2) of the drum 30 may include a maintenance period (C) in which the maximum RPM of the drum 30 is constantly maintained in the corresponding stroke. That is, after the controller 100 controls the drive unit 80 to increase the RPM of the drum 30 to the maximum RPM, the maximum RPM is maintained for a predetermined time TC, and after the predetermined time TC, the drum ( 30) The maintenance motion M2 of the drum 30 may be implemented by reducing the RPM.

Compared to the above-described peak motion M1, the maintenance motion M2 of the drum 30 may be more advantageous in increasing the efficiency of removing moisture from clothes. For example, in the second dehydration process (P32), the control unit 100 can sufficiently remove moisture from the clothes by increasing the RPM maintenance period (C) as necessary during the maintenance motion (M2) of the drum 30.

That is, in one embodiment of the present invention, it is possible to suppress the phenomenon of trapping of clothes and remove a certain level of moisture from clothes through the peak motion (M1) of the drum 30 in the first dehydration process (P31). A second dehydration process (P32) in which dehydration proceeds through the maintenance motion (M2) of the drum 30 is performed on the clothes whose deformability is sufficiently reduced due to the removal of moisture to a certain level through the dehydration process (P31). In the first half of the dehydration process (P3), it is possible to effectively suppress the adhesion of clothes and efficiently remove moisture.

In the first spin cycle (P31), the controller 100 controls the rotation of the drum 30 to increase the RPM of the drum 30 to the peak RPM (R1) in a first acceleration section (I) And after the first acceleration section (I), it may be provided to perform a first deceleration section (D) in which the RPM of the drum 30 reaches the peak RPM (R1) and decreases at the same time.

The peak RPM (R1) may correspond to the maximum RPM of the drum 30 in the first dehydration cycle (P31), and the value may be stored as a fixed value in the controller 100 or adjusted based on the moisture content. there is.

The first acceleration section (I) and the first deceleration section (D) may be performed continuously. In the peak motion M1, the maintenance period C of the drum 30 RPM is omitted.

Meanwhile, in the second dehydration stroke (P32), the control unit 100 controls the rotation of the drum 30 to increase the RPM of the drum 30 to the maintenance RPM (R2) in the second acceleration section ( I), after the second acceleration period (I), a maintenance period (C) in which the RPM of the drum 30 maintains the maintenance RPM (R2), and after the maintenance period (C), the It may be provided to perform the second deceleration section (D) in which the RPM is reduced from the maintained RPM (R2).

The maintenance RPM (R2) may correspond to the maximum RPM of the drum 30 during the second spin-drying cycle (P32), that is, the maintenance motion (M2) of the drum 30. The sustaining period (C) may be performed after the second acceleration period (I), and the second deceleration period (D) may be performed after the sustaining period (C), thereby implementing the sustaining motion (M2).

On the other hand, FIG. 8 shows a view in which moisture contained in clothing is conceptually divided and expressed. Referring to Figure 8, the water contained in the clothing during the dehydration process (P3) is divided into free water (FW) (FREE WATER), stagnant water (SW) (STAGNANT WATER) and boundary water (BW) (BOUND WATER) can be understood

Based on the fibers (F) constituting the clothing, the free moisture (FW) is the moisture located at the farthest distance from the fibers (F) and passes through the through hole (38) of the drum (30) when the drum (30) rotates. can be easily removed from clothing.

Although stagnant moisture (SW) is not in a state where the binding force with the fiber (F) is stronger than that of the boundary moisture (BW), it is not easily moved due to the arrangement of clothes and the position of the through hole 38 of the drum 30, etc., and is discharged at a certain RPM or higher. It can be.

Boundary moisture (BW) is not easily separated by centrifugal force by the drum 30 due to a high degree of adhesion to the fiber (F), and can be understood as moisture that can be removed through a phase change process such as evaporation.

An embodiment of the present invention can remove free moisture (FW) that can be easily removed from clothes as much as possible through the peak motion (M1) of the first dehydration process (P31), and the removal of free moisture (FW) increases the moisture content. By performing the maintenance motion (M2) of the second dehydration process (P32) against the fiber (F) whose deformability is lowered to a certain level or less, it is possible to effectively remove the stagnant water (SW) and suppress the adhesion phenomenon. .

Meanwhile, FIG. 9 schematically shows an example of the trapping phenomenon to be suppressed in one embodiment of the present invention.

Specifically, moisture inside the drum 30 may be discharged to the outside of the drum 30 through the through hole 38 of the drum 30 . Moisture separated from the fibers F of clothing may adhere to the circumferential surface of the drum 30 by centrifugal force.

On the other hand, the circumferential surface of the drum 30 may be provided with a fine groove depressed about the through hole 38, and moisture adhering to the circumferential surface of the drum 30 follows the shape of the through hole ( 38) can flow.

In this process, the moisture present on the circumferential surface of the drum 30 can provide adhesive force between the circumferential surface of the drum 30 and the clothes, and the adhesive force can induce the adhesion of the clothes.

In addition, during the movement of moisture, the moisture separated from the fibers F and the moisture still present in the clothing move toward the through-hole 38, and are affected by the movement of the moisture around the through-hole 38. The fiber F may have a shape locally inserted into the through hole 38 while being deformed to correspond to the shape of the groove or the through hole 38 on the circumferential surface of the drum 30 .

The deformation of the fiber (F) and the adhesive force of water may cause a trapping shape, and the trapping phenomenon may hinder the discharge of moisture through the through hole 38, and the clothes exposed to the inside of the drum 30 By reducing the surface area, drying efficiency in the drying process (P4) can be reduced.

More specifically, the frictional force between the clothes caught in the through hole 38 and the through hole 38 and the adhesion force due to water may exist as forces causing the adhesion phenomenon. A state in which clothes are caught in the through hole 38 may be caused by centrifugal force according to rotation of the drum 30 .

On the other hand, the force acting in the direction of eliminating the fabric sticking phenomenon may be the movement momentum of the clothes due to the weight of the clothes and the unwinding motion (M3) of the clothes. That is, when the self-weight of the clothing is greater than the sum of the frictional force between the clothing and the through hole 38 and the adhesion due to water, the cloth adhesion phenomenon of the clothing can be naturally eliminated.

Accordingly, one embodiment of the present invention uses the peak motion (M1) of the first dehydration process (P31) to remove moisture to the extent that the sticking phenomenon does not occur, and as the moisture is removed, the deformation rate of the clothing is lowered. Since the degree of insertion into the through hole 38 is reduced, the frictional force may be reduced, and the adhesion force by water may also be lowered.

As described above, by performing the second dehydration cycle (P32) including the high RPM maintenance section (C) for the clothes whose moisture has been reduced to a certain level or less, the rate of moisture reduction is gradually increased, so that the sum of the frictional force and the adhesive force of the clothes By being always lower than the weight of the clothes, the adhesion phenomenon can be prevented even in the second spin-drying process (P32).

Returning to FIG. 7 again, in one embodiment of the present invention, the maintenance RPM (R2) may have a higher value than the peak RPM (R1). The peak RPM (R1) corresponds to a relatively low RPM to minimize deformation of clothes, and the maintenance RPM (R2) corresponds to a relatively high RPM to increase the effect of removing moisture.

Meanwhile, in one embodiment of the present invention, the drum 30 may perform a pop-unwinding motion (M3). In the first spin-drying process (P31), the drum 30 may repeatedly perform the pop-off motion (M3) after the peak motion (M1) is performed.

In the pop-off motion M3, the drum 30 may be rotated at a pop-off RPM R3 lower than the peak RPM R1 and then stopped. Separation due to a difference in inertia between the circumferential surface of the drum 30 and the clothing may be induced through the unwinding motion M3.

7 shows the change in RPM of the drum 30 that rotates and stops at the popping RPM R3 corresponding to a relatively low RPM in relation to the peak RPM R1. In the pop-unwinding motion M3, the drum 30 may be rotated in one direction after being stopped after rotating in one direction, or may be rotated in another direction opposite to the one direction after stopping after rotating in one direction. That is, in the repeated pop-unwinding motion M3, the drum 30 may rotate in one direction and in the other direction alternately.

Meanwhile, the first dehydration cycle P31 may include a 1-1 dehydration cycle P311 and a 1-2 dehydration cycle P312. In the 1-1 dehydration process (P311), the RPM of the drum 30 decreases right after rising to the first peak RPM (R11), and the first peak motion (M11) of the drum 30 is performed, and the first peak motion (M11) of the drum 30 is performed. In the 1-2 dehydration stroke (P312), the RPM of the drum 30 decreases immediately after rising to the second peak RPM (R12), which is different from the first peak RPM (R11), so that the second peak motion of the drum 30 ( M12) may be performed.

The 1-1 dehydration process (P311) and the 1-2 dehydration process (P312) are the peak motion of the drum 30 at the first peak RPM (R11) and the second peak RPM (R12) corresponding to different RPM By performing M1), it is possible to more effectively prevent the adhesion phenomenon and remove moisture.

The second peak RPM (R12) may be set to have a higher value than the first peak RPM (R11), and the maintenance RPM (R2) has a higher value than the second peak RPM (R12). can be set to

That is, in one embodiment of the present invention, the drum 30 may be rotated in a motion in which the maximum RPM gradually increases as the dehydration process P3 progresses.

The first peak RPM (R11), the second peak RPM (R12), and the maintenance RPM (R2) may be determined based on experimental/statistical results, or may be determined based on currently measured results such as moisture content of clothes.

10 shows whether or not the trapping phenomenon occurs by changing the first peak RPM (R11) and the holding time of the first peak RPM (R11) for the first peak motion (M11) in one embodiment of the present invention. A graph is shown.

In the graph of FIG. 10, the horizontal axis represents the first peak RPM (R11), the vertical axis represents the holding time of the first peak RPM (R11), and a plurality of regions roughly divided by diagonal lines represent the moisture content level of clothing. The mark represents the condition in which the trapping phenomenon was prevented, and the X mark represents the condition in which the trapping phenomenon occurred.

Referring to the graph of FIG. 10, since the 1-1 dehydration cycle (P311) is the first dehydration situation in which the moisture of the clothes is not removed, it can be confirmed that the trap adhesion phenomenon is prevented at a low RPM among a plurality of RPMs that are experimental conditions. can

Accordingly, the first peak RPM (R11) may be determined in the lowest RPM range in relation to the second peak RPM (R12) and the maintenance RPM (R2). In addition, it can be confirmed that there is a limit to the moisture content of clothes that can be reached through the first peak motion M11.

In this regard, the first peak RPM (R11) may be set to a value between 300 and 600 RPM. The first peak RPM (R11) may be set to a value between 350 and 550 RPM. The first peak RPM (R11) may be set to a value between 400 and 500 RPM.

Furthermore, looking at the duration of each RPM, if the holding period (C) for the RPM occurs, the trapping phenomenon may occur, and even if the holding period (C) is held, the RPM of the experimental condition in which the trapping phenomenon does not occur is too low, it can be confirmed that the water removal efficiency is too low.

That is, in one embodiment of the present invention, the first peak RPM (R11) is set to the lowest RPM in relation to the second peak RPM (R12) and the maintenance RPM (R2), and by eliminating the maintenance period (C), It is possible to significantly reduce the moisture content of clothes to the extent that the 1st-2nd dehydration cycle (P312) is possible while preventing the adhesion phenomenon caused by the initial dehydration situation.

On the other hand, in FIG. 11, in an embodiment of the present invention, the second peak RPM (R12) and the holding time of the second peak RPM (R12) are changed for the second peak motion (M12) to determine whether or not the trapping phenomenon occurs. The displayed graph is shown.

In the graph of FIG. 11, the horizontal axis represents the second peak RPM (R12), the vertical axis represents the holding time of the second peak RPM (R12), and a plurality of regions roughly divided by diagonal lines represent the moisture content level of clothing. The mark represents the condition in which the trapping phenomenon was prevented, and the X mark represents the condition in which the trapping phenomenon occurred.

The second peak RPM (R12) shown in the graph of FIG. 11 has a higher value than the experimental condition of the first peak RPM (R11) of FIG. 10 as a whole. In addition, since all of the free moisture (FW) of the clothes is not removed only by the 1-1 dehydration cycle (P311), all of the clothes are attached when the maintenance period (C) is set regardless of the RPM level shown in FIG. 11. It can be confirmed that the phenomenon has occurred.

On the other hand, it can be confirmed that the selectable range of the second peak RPM (R12) in the 1-2 dehydration cycle (P312) performed after the 1-1 dehydration cycle (P311) is increased compared to the case of the first peak RPM (R11). there is.

For example, the second peak RPM (R12) may be set to a value between 750 and 950 RPM. The second peak RPM (R12) may be set to a value between 800 and 900 RPM. The second peak RPM (R12) may be set to a value between 820 and 880 RPM. The second peak RPM (R12) may be set to a value between 840 and 860 RPM.

An embodiment of the present invention multi-steps the first dehydration process (P31) utilizing the peak motion (M1) to remove moisture from clothes step by step to effectively suppress the trapping phenomenon, and the trapping phenomenon occurs even at high RPM. It is possible to reduce the moisture content of clothing to a level that does not become

Meanwhile, FIG. 12 is a graph illustrating a change in duration of the maintenance RPM (R2) for the maintenance motion (M2) and a corresponding change in moisture content of clothing in one embodiment of the present invention.

In the graph of FIG. 12, the horizontal axis represents the duration of maintenance RPM (R2), and the vertical axis represents the moisture content of clothes. Based on the dotted line parallel to the abscissa axis, the data shown above represent the experimental results for the clothing of the first cloth, and the data shown below represent the experimental results for the clothing of the second cloth.

A plurality of circles adjacent to each other and gradually moving downward represent the change process of the initial moisture content and the final moisture content measured in any one experimental group.

After the first dehydration cycle (P31) consisting of a plurality of steps, the moisture content of the clothes may be in a state in which the adhesion phenomenon no longer occurs due to the influence of the RPM. Accordingly, the maintenance RPM (R2) may be selected as a sufficiently high RPM capable of removing up to the aforementioned stagnant water (SW).

For example, the maintenance RPM (R2) may be set to a value between 880 and 1100 RPM. The maintenance RPM (R2) may be set to a value between 950 and 1080 RPM. The maintenance RPM (R2) may be set to a value between 1000 and 1060 RPM.

Meanwhile, the determination of the holding time for the holding section C in the holding motion M2 may consider energy efficiency and ease of use as well as a water removal effect. For example, if the holding time is too short, the moisture content of clothes after the second dehydration cycle (P32) may be too high, and if the holding time is too long, energy consumption in the second dehydration cycle (P32) becomes excessive and the dehydration cycle (P3) Execution time may be prolonged, and convenience of use may be deteriorated.

Accordingly, the holding time may be selected so that the moisture content of the clothes is effectively reduced, but not excessively long in consideration of energy efficiency and the like.

For example, the holding time may be determined as a value between 6 and 18 minutes. The holding time may be determined as a value between 8 and 16 minutes. The holding time may be determined as a value between 9 and 12 minutes.

As a result, in one embodiment of the present invention, the dehydration process (P3) may be performed by dividing the first dehydration process (P31) and the second dehydration process (P32). In the first peak motion (M11) of the first dehydration process (P31), the maintenance period (C) can be omitted to prevent the trapping phenomenon, and the free moisture (FW) of the clothes is sufficiently removed to prevent the trapping phenomenon. A possible peak RPM (R1) can be selected.

In addition, in order to reach the moisture content of clothes that can prevent the sticking phenomenon even at high RPM for removing stagnant water (SW), the first dehydration cycle (P31) is performed by the 1-1 dehydration cycle (P311) and the first dehydration cycle (P311). -2 It may proceed with a plurality of strokes including dehydration stroke (P312).

Since the first peak motion (M11) of the 1-1 dehydration stroke (P311) is an initial dehydration removal process, the first peak RPM (R11) can be set lower than the second peak RPM (R12) and the maintenance RPM (R2). . In the second peak motion (M12) of the 1-2 dehydration stroke (P312), the second peak RPM (R12) is the first peak RPM ( R11) can be set to a higher value.

On the other hand, in one embodiment of the present invention, by removing the free moisture (FW) of the clothes through the first dehydration process (P31), the easy deformation of the clothes is low, and the adhesion phenomenon is prevented regardless of the RPM of the drum 30. In a possible state, the second dehydration process (P32) can be performed.

The maintenance motion (M2) of the drum 30 performed in the second dehydration cycle (P32) may be set to a high RPM capable of effectively removing stagnant moisture (SW) present in the clothes, but the clothes are within the target range. The duration of the maintenance period C may be selected in consideration of the humidity.

Returning to FIG. 7 again, in the 1-1 dehydration stroke (P311), the drum 30 performs the first peak motion (M11), and then the unwinding RPM lower than the first peak RPM (R11) ( After being rotated in R3), the pop-unwinding motion (M3) that is stopped can be repeatedly performed.

That is, the control unit 100 controls the driving unit 80 so that the first peak motion M11 of the 1-1 spin cycle P311 and the second peak motion M12 of the 1-2 spin cycle P312 occur. By performing the fabric unwinding motion M3 multiple times, it is possible to prevent unintended fabric adhesion.

Furthermore, the controller 100 controls the drum 30 to perform the pop-off motion M3 after each of the first peak motion M11, the second peak motion M12, and the maintenance motion M2 is performed. It is possible to control the rotation of the drum 30 to perform.

Accordingly, in the 1-1 dehydration cycle (P311), the drum 30 may perform the first peak motion (M11) and the pop-off motion (M3), and in the 1-2 dehydration cycle (P312), the drum ( 30) can perform the second peak motion (M12) and the foam unwinding motion (M3), and in the second spin-drying operation (P32), the drum 30 performs the second maintenance motion (M2) and the foam unwinding motion (M3). can be performed.

The control unit 100 can shake the clothes inside the drum 30 through the unwinding motion M3 to effectively prevent the adhesion of the clothes while sequentially performing the spin-drying cycle P3.

On the other hand, in one embodiment of the present invention, the peak RPM (R1) is a predetermined value adjusted by the control unit 100 based on the moisture content of clothes, or is not a predetermined value, but is performed during the first spin cycle (P31). It may be determined based on the moisture content of clothing identified in .

For example, the control unit 100 controls the moisture content of the clothes to fall within a first predetermined range in the first peak RPM (R11) rotation state of the drum 30 in the 1-1 spin cycle (P311). The first peak RPM (R11) may be set.

The first dehydration cycle (P31) can be understood as a cycle for reaching a moisture content of clothes at which the trapping phenomenon does not occur even at the maximum RPM performed in the second dehydration cycle (P32). In addition, the purpose of the 1-1 dehydration cycle (P311) is to form a moisture content of clothes that may not cause adhesion even at the second peak RPM (R12) of the 1-2 dehydration cycle (P312). It can be understood that there is

That is, in the 1-1 spin cycle (P311) and the 1-2 spin cycle (P312), the target moisture content of clothes can be determined, respectively, and the first acceleration section (I) and the second acceleration section (I) During the process, the drum 30 RPM at the time of reaching the target moisture content is reflected as the first peak RPM (R11) and the second peak RPM (R12) to proceed with the first deceleration section (D) and the second deceleration section (D). can

The target moisture content of the 1-1 dehydration cycle (P311) and the 1-2 dehydration cycle (P312) may be variously determined based on the maintenance RPM (R2) of the 2nd dehydration cycle (P32), the maintenance time, and the amount of fabric. .

The control unit 100 controls the moisture content of the clothes to be in a second range lower than the first range in the rotational state of the drum 30 at the second peak RPM (R12) in the first and second dehydration cycles (P312). The second peak RPM (R12) may be set to fall.

Clothes having a moisture content within the second range may not have a tacking phenomenon even if the maintenance RPM (R2) of the second dehydration cycle (P32) continues, and the first and second ranges of the moisture content may be can be selected statistically.

Meanwhile, one embodiment of the present invention may include the measuring unit 28 shown in FIG. 3 . The measuring unit 28 is provided inside the cabinet 10 to measure the moisture content of the clothes.

The measuring unit 28 may be provided to measure the amount of moisture in the clothes through contact with the clothes, or may be provided to measure the humidity of the air inside the tub 20 . The control unit 100 may determine the moisture content of the clothing through the measurement value of the measuring unit 28 .

The controller 100 may adjust the peak RPM (R1) according to the moisture content of the clothes, and set a constant maintenance RPM (R2) regardless of the moisture content of the clothes.

That is, in one embodiment of the present invention, the peak RPM (R1) of the first spin cycle (P31) may be determined or adjusted according to whether or not the target moisture content of the clothes is reached, but the maintenance RPM ( R2) may be a predetermined and fixed value regardless of a change in the moisture content of clothes in order to secure the effect of removing the moisture content in consideration of the final dehydration process.

However, it is needless to say that the maintenance RPM (R2) may also be adjusted by the control unit 100 based on the amount of fabric, the initial moisture content of the clothes, and the change in the duration of the maintenance period (C), if necessary.

The predetermined time period (TC) during which the maintenance RPM (R2) is maintained in the second dehydration process (P32) is the execution time (T11) of the first peak motion (M11) or the execution of the second peak motion (M12). It may be set longer than the time T21.

In addition, the predetermined time period (TC) during which the maintenance RPM (R2) is maintained in the second dehydration process (P32) is the execution time (T1) of the 1-1 dehydration process (P311) or the 1-2 dehydration process (P311). It can be set longer than the execution time (T2) of the process (P312).

The 1-1 dehydration stroke (P311) and the 1-2 dehydration stroke (P312) can shorten the time to suppress the trapping phenomenon, and the maintenance period (C) of the second dehydration stroke (P32) is It may be performed with a sufficient duration in order to sufficiently secure the effect of reducing the moisture content.

On the other hand, the time required for the RPM of the drum 30 to reach the first peak RPM (R11) in the 1-1 dehydration stroke (P311), that is, the acceleration section for the first peak RPM (R11) ( The execution time (T12) of I) is the time required for the RPM of the drum 30 to reach the second peak RPM (R12) in the 1st-2nd spin cycle (P312), that is, the second peak RPM ( R12) may be shorter than the execution time T22 of the acceleration section I.

In addition, in one embodiment of the present invention, the drying process P4 may be performed after the dehydration process P3 is completed by using the drying unit 90 described above. Free moisture (FW) and stagnant moisture (SW) of clothes can be removed through the dehydration process (P3), and boundary moisture (BW) of clothes can be removed through the drying process (P4), so the degree of drying of the clothes can be greatly improved.

Furthermore, in one embodiment of the present invention, by using the peak motion (M1) and the maintenance motion (M2) in stages, the adhesion phenomenon according to the dehydration process (P3) can be suppressed, and accordingly, the dehydration process (P3 ), the drying efficiency of the subsequent drying process (P4) can be greatly improved.

Meanwhile, FIG. 13 is a flowchart illustrating a control method of the laundry treatment apparatus 1 according to an embodiment of the present invention.

The control method of the laundry treatment apparatus 1 according to an embodiment of the present invention may include performing a washing cycle (S100). In the washing cycle execution step ( S100 ), the control unit 100 may control the water supply unit 40 , the detergent supply unit 70 , and the drive unit 80 to perform the laundry cycle P1 .

An embodiment of the present invention may include performing a rinsing cycle (S200). In the rinsing operation step (S200), the controller 100 controls the water supply unit 40 to supply water into the tub 20, and rotates the drum 30 to remove contaminants from the clothes from the tub 20. can be released with

An embodiment of the present invention may include a first dehydration operation step (S300). In the first dehydration cycle performing step (S300), the control unit 100 may perform the aforementioned first dehydration cycle (P31). That is, in the first dehydration cycle (S300), the RPM of the drum 30 is reduced immediately after increasing to the peak RPM (R1) set in the controller 100, and the peak motion (M1) of the drum 30 is performed. It can be.

An embodiment of the present invention may include a second dehydration cycle performing step (S400). In the step of performing the second dehydration cycle (S400), the control unit 100 may perform the aforementioned second dehydration cycle (P32). The second dehydration stroke performing step (S400) is a predetermined time (TC) after the RPM of the drum 30 increases to the maintenance RPM (R2) set in the controller 100 after the first dehydration stroke performing step (S300). After maintaining the maintenance RPM (R2) for a while, the maintenance motion (M2) of the drum 30 may be performed by decreasing it.

The first dehydration stroke performing step (S300) may include a 1-1 dehydration stroke performing step (S310) and a 1-2 dehydration stroke performing step (S320).

In the step of performing the 1-1 dehydration cycle (S310), the control unit 100 may perform the above-described 1-1 dehydration cycle (P311). In the 1-1 dehydration cycle performing step (S310), the RPM of the drum 30 is decreased immediately after increasing to the first peak RPM (R11), so that the first peak motion (M11) of the drum 30 may be performed. there is.

In the step of performing the 1-2 dehydration cycle (S320), the controller 100 may perform the aforementioned 1-2 dehydration cycle (P312). In the 1-2 dehydration cycle performing step (S320), the RPM of the drum 30 is decreased immediately after increasing to the second peak RPM (R12) higher than the first peak RPM (R11), 2 peak motion M12 may be performed.

The 1-1 dehydration stroke performing step (S310) may include a 1-1 RPM acceleration step (S311). In the 1-1 RPM acceleration step (S311), the control unit 100 may perform an acceleration section (I) in which the RPM of the drum 30 is accelerated to the first peak RPM (R11) by controlling the drive unit 80.

The 1-1 dehydration cycle performing step (S310) may include a 1-1 moisture content determination step (S312). The controller 100 may determine whether the moisture content of clothes falls within a first range in the 1-1 moisture content determination step ( S312 ).

The first range may correspond to the target moisture content of the 1-1 dehydration step (P311), and the control unit 100 utilizes the above-described measuring unit 28 or uses various other methods to determine the moisture content of clothes. can

The 1-1 dehydration stroke performing step (S310) may include a 1-1 RPM deceleration step (S313). In the 1-1 moisture content determination step (S312), when the moisture content of the clothes falls within the first range, the RPM of the drum 30 in the corresponding state is determined as the first peak RPM (R11), and the control unit 100 determines the drum 30 RPM. A deceleration section (D) for decelerating the RPM of (30) can be performed. However, if necessary, the controller 100 may determine the second peak RPM (R12) in advance regardless of the moisture content.

The 1-1 spin-drying step (S310) may include a 1-1 unwinding step (S314). In the 1-1 fluff unwinding step (S314), the control unit 100 controls the drive unit 80 to rotate the drum 30 so that the RPM of the drum 30 corresponds to the fluff unwinding RPM (R3), and Then, the pop-unwinding motion M3 of the drum 30, which is stopped again, can be performed.

In the 1-1st unwinding step (S314), the unwinding motion (M3) including the rotation and stop of the drum 30 may be repeatedly performed a plurality of times. The control unit 100 determines that the RPM of the drum 30 is the first peak RPM (R11 ), the rotation of the drum 30 may be controlled so that the pop-unwinding motion M3 of the drum 30 is performed after being rotated at a lower pop-unwinding RPM R3.

The 1-2 dehydration stroke performing step (S320) may include a 1-2 RPM acceleration step (S321). In the 1-2 RPM acceleration step (S321), the control unit 100 may perform an acceleration section (I) in which the RPM of the drum 30 is accelerated to the second peak RPM (R12) by controlling the drive unit 80.

The 1-2 dehydration cycle performing step (S320) may include a 1-2 moisture content determination step (S322). The control unit 100 may determine whether the moisture content of clothes falls within the second range in the first-second moisture content determination step ( S322 ).

The second range may correspond to the target moisture content of the first-second dehydration process (P312) and may correspond to a range having a lower value than the aforementioned first range. According to an embodiment of the present invention, the moisture content of clothes may be gradually reduced through step-by-step execution of the 1-1 dehydration cycle (S310) and the 1-2 dehydration cycle (S320).

The 1-2 dehydration stroke performing step (S320) may include a 1-2 RPM deceleration step (S323). In the 1-2 moisture content determination step (S322), when the moisture content of the clothes falls within the second range, the RPM of the drum 30 in the corresponding state is determined as the second peak RPM (R12), and the controller 100 controls the drum A deceleration section (D) for decelerating the RPM of (30) can be performed. However, if necessary, the controller 100 may determine the second peak RPM (R12) in advance regardless of the moisture content.

The 1-2 spin-drying operation step (S320) may include a 1-2 cloth unwinding step (S324). In the 1-2 fluff unwinding step (S324), the control unit 100 controls the driving unit 80 to rotate the drum 30 so that the RPM of the drum 30 corresponds to the fluff unwinding RPM (R3), and Then, the pop-unwinding motion M3 of the drum 30, which is stopped again, can be performed. In the first-second unwinding step (S324), the unwinding motion (M3) including the rotation and stop of the drum 30 may be repeatedly performed a plurality of times.

The second dehydration stroke performing step (S400) may include a second RPM acceleration step (S410). In the second RPM acceleration step (S410), the control unit 100 may perform an acceleration section (I) in which the RPM of the drum 30 is accelerated to the maintained RPM (R2) by controlling the drive unit 80.

The second dehydration stroke performing step (S400) may include a maintenance RPM determination step (S420). In the maintenance RPM determination step (S420), the controller 100 may determine whether the RPM of the drum 30 corresponds to a preset maintenance RPM (R2).

The second dehydration stroke performing step (S400) may include a second RPM maintaining step (S430). If it is determined in the maintenance RPM determination step (S420) that the RPM of the drum 30 corresponds to the maintenance RPM (R2), the control unit 100 controls the driving unit 80 so that the RPM of the drum 30 maintains the maintenance RPM (R2). ) can be performed.

The second dehydration stroke performing step (S400) may include a holding time determining step (S440). The control unit 100 may determine whether the duration of the second RPM maintaining step (S430), that is, the maintaining period (C) is equal to or longer than a preset maintaining time.

The second dehydration stroke performing step (S400) may include a second RPM deceleration step (S450). In the maintaining time determination step (S440), when the duration of the maintaining period (C) exceeds the maintaining time, the control unit 100 may perform a deceleration period (D) of decelerating the RPM of the drum (30).

The second spin-drying operation step (S400) may include a second fabric unwinding step (S460). In the second unwinding step (S460), the control unit 100 controls the driving unit 80 to rotate the drum 30 so that the RPM of the drum 30 corresponds to the unwinding RPM (R3), and again after a certain period of time. The pop-unwinding motion (M3) of the drum 30 being stopped may be performed. In the second unwinding step (S460), the unwinding motion (M3) including rotation and stop of the drum 30 may be repeatedly performed a plurality of times.

Although the present invention has been shown and described in relation to specific embodiments, it is known in the art that the present invention can be variously improved and changed without departing from the technical spirit of the present invention provided by the claims below. It will be self-evident to those skilled in the art.

Claims (22)

1. cabinet;

   a tub provided inside the cabinet to receive water;

   a drum rotatably provided inside the tub to accommodate clothes and having a plurality of through holes through which water accommodated in the tub passes; and

   A control unit provided to control rotation of the drum and perform a spin-drying operation of the clothes;

   The dehydration process includes a first dehydration process and a second dehydration process,

   In the first dehydration stroke, the RPM of the drum is reduced immediately after increasing to the peak RPM set in the control unit, so that the peak motion of the drum is performed,

   In the second spin cycle, the RPM of the drum increases to the maintenance RPM set in the controller, maintains the RPM for a predetermined time, and then decreases to perform the maintenance motion of the drum.
2. According to claim 1,

   A drive unit provided inside the cabinet and connected to the drum to provide rotational force; further comprising;

   The control unit controls the driving unit to adjust the RPM of the drum.
3. According to claim 1,

   In the first dehydration cycle, the control unit controls rotation of the drum to

   A first acceleration section in which the RPM of the drum is increased to the peak RPM, and

   After the first acceleration section, the clothes handling apparatus is provided to perform a first deceleration section in which the RPM of the drum decreases as soon as it reaches the peak RPM.
4. According to claim 1,

   In the second spin cycle, the control unit controls rotation of the drum to

   A second acceleration section in which the RPM of the drum is increased to the maintained RPM;

   After the second acceleration period, a maintenance period in which the RPM of the drum maintains the maintenance RPM, and

   After the maintenance period, the laundry treatment apparatus is provided to perform a second deceleration period in which the RPM of the drum is reduced from the maintenance RPM.
5. According to claim 1,

   The maintenance RPM has a higher value than the peak RPM.
6. According to claim 1,

   In the first dehydration process, the drum repeatedly performs a popping motion after the peak motion is performed,

   The laundry treatment apparatus of claim 1 , wherein the drum is rotated at an unwinding RPM lower than the peak RPM in the unwinding motion, and then stopped.
7. According to claim 1,

   The first dehydration stroke includes a 1-1 dehydration stroke and a 1-2 dehydration stroke,

   In the 1-1 dehydration stroke, the RPM of the drum decreases immediately after rising to the first peak RPM, so that the first peak motion of the drum is performed,

   In the first-second spin-drying cycle, the RPM of the drum increases immediately after rising to a second peak RPM different from the first peak RPM and decreases, thereby performing a second peak motion of the drum.
8. According to claim 7,

   The second peak RPM is set to have a higher value than the first peak RPM.
9. According to claim 8,

   The maintenance RPM is set to have a higher value than the second peak RPM.
10. According to claim 7,

    In the 1-1 spin cycle, the drum is rotated at a lower RPM than the first peak RPM after performing the first peak RPM, and then repeatedly performs a stopped linen unwinding motion.
11. According to claim 10,

    The control unit controls rotation of the drum so that the drum performs the unwinding motion after each of the first peak motion, the second peak motion, and the holding motion is performed.
12. According to claim 7,

    The control unit sets the first peak RPM so that the moisture content of the clothes falls within a predetermined first range in the first peak RPM rotation state of the drum in the 1-1 spin cycle.
13. According to claim 12,

    The control unit sets the second peak RPM so that the moisture content of the clothes falls within a second range lower than the first range in the rotational state of the drum at the second peak RPM in the first and second dehydration cycles. Device.
14. According to claim 12,

    A measuring unit provided inside the cabinet to measure the moisture content of the clothes;

    The control unit determines the moisture content of the clothes through the measured value of the measurement unit.
15. According to claim 1,

    wherein the control unit adjusts the peak RPM according to the moisture content of the clothes and sets a constant maintenance RPM regardless of the moisture content of the clothes.
16. According to claim 7,

    The predetermined time period during which the maintenance RPM is maintained in the second spin cycle is set to be longer than an execution time of the first peak motion or the second peak motion.
17. According to claim 7,

    The predetermined time period during which the maintenance RPM is maintained in the second spin cycle is set to be longer than the execution time of the 1-1 spin cycle or the 1-2 spin cycle.
18. According to claim 7,

    The time required for the RPM of the drum to reach the first peak RPM in the 1-1 dehydration cycle is the time required for the RPM of the drum to reach the second peak RPM in the 1-2 dehydration cycle. A clothes handling device that is shorter than the time.
19. According to claim 1,

    A drying unit provided inside the cabinet and increasing the temperature inside the tub;

    The control unit is provided to perform a drying operation of the clothes after performing the spin-drying operation.
20. A cabinet, a tub provided inside the cabinet to accommodate water, a drum rotatably provided inside the tub to accommodate clothes and having a plurality of through holes through which water accommodated in the tub passes, and rotation of the drum In the control method of a laundry treatment apparatus including a control unit provided to control and perform a spin-drying operation of the clothes,

    performing a first dehydration cycle in which the RPM of the drum is reduced right after it increases to the peak RPM set in the control unit and the peak motion of the drum is performed; and

    After the first dehydration cycle, performing a second dehydration cycle in which the RPM of the drum increases to the maintenance RPM set in the control unit, maintains the maintenance RPM for a predetermined time, and then decreases to perform a maintenance motion of the drum; A control method of a laundry treatment device comprising a.
21. According to claim 20,

    The first dehydration stroke performing step includes a 1-1 dehydration stroke performing step and a 1-2 dehydration stroke performing step,

    In the step of performing the 1-1 dehydration cycle, the RPM of the drum is reduced immediately after increasing to the first peak RPM, so that the first peak motion of the drum is performed,

    In the step of performing the 1-2 spin-drying cycle, the RPM of the drum is reduced immediately after increasing to a second peak RPM higher than the first peak RPM, so that the second peak motion of the drum is performed.
22. According to claim 21,

    After each of the first peak motion, the second peak motion, and the maintenance motion has been performed, the control unit rotates the RPM of the drum at a popping RPM lower than the first peak RPM, and then stops the popping motion of the drum. A control method of a laundry treatment apparatus for controlling the rotation of the drum to perform this.

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