WO2023027454A1

WO2023027454A1 - Clothes treatment apparatus

Info

Publication number: WO2023027454A1
Application number: PCT/KR2022/012526
Authority: WO
Inventors: 이연주; 이종민; 김민지; 최운제; 김태웅
Original assignee: 엘지전자 주식회사
Priority date: 2021-04-19
Filing date: 2022-08-22
Publication date: 2023-03-02
Also published as: KR20220144286A; AU2022333753A1

Abstract

The present invention relates to a clothes treatment apparatus which provides various optimized drum motion combinations that can prevent damage to clothes or prevent shrinkage of the clothes in each of the preheating section, a constant rate drying section, a falling rate drying section, and a cooling section.

Description

clothes handling device

The present invention relates to a laundry treatment device. More specifically, it relates to a clothes handling apparatus capable of drying clothes.

A laundry treatment device is a device capable of washing, drying, or washing and drying clothes (objects to be washed or objects to be dried), and includes a washing machine, a dryer, and a washing machine with both dryers.

Recently, a clothes treatment apparatus capable of intensively drying clothes using a heat pump has appeared. In this conventional laundry treatment apparatus, hot air generated by the heat pump is supplied to clothes accommodated in the drum, and the clothes are evenly exposed to the hot air while rotating the drum at the same time, thereby drying the clothes.

1 shows the structure of a conventional laundry treatment apparatus capable of performing a drying cycle.

Referring to Korean Patent Publication No. 10-2019-0121656, a conventional dryer is provided to fix the drive unit 3 to the bottom surface of the cabinet 1.

Specifically, the dryer includes a cabinet 1 and a drum 2, a circulation passage 5 for circulating the air of the drum 2 to the outside, and accommodated in the circulation passage 5 to condense the air. and a heat pump 6 for heating again. The water condensed in the heat pump 6 may be collected in the water storage tank 9 using the pump 8. Meanwhile, even if the drive unit 3 vibrates or a temporary external force is transmitted through the drive unit 3, the bottom surface 12 of the cabinet 1 may be prevented from being deformed or tilted.

Therefore, the conventional dryer is provided to fix the drive unit 3 to the bottom surface 12 of the cabinet 1 or a base fixed to the bottom surface of the cabinet 1 from the bottom of the drum 2. Since the driving unit 3 is not disposed parallel to the rotating shaft of the drum 2 in this dryer, a separate configuration is additionally used to rotate the drum 2.

Specifically, the drive unit 3 includes a motor unit 34 fixed to the bottom of the cabinet 1, a rotation shaft 37 rotating on the motor unit 34, and a motor unit 37 rotating by the rotation shaft 37. It may include a pulley 35 and a belt 36 provided to connect the outer circumferential surface of the drum 2 and the outer circumferential surface of the pulley 35 .

Thus, when the motor unit 34 rotates the rotating shaft 37, the pulley 35 rotates the belt 36, and the belt 36 can rotate the drum 2. At this time, since the diameter of the pulley 35 is much smaller than the diameter of the drum 2, the dryer can omit the reducer. However, in this dryer, since the diameter of the pulley 35 is much smaller than the diameter of the drum 2, when the motor part 34 rotates quickly, the belt 36 moves the drum 2 or the pulley ( 35), a slipping phenomenon occurs. Therefore, this dryer has a problem in that the rotational acceleration of the motor unit 34 is limited to a certain level or less, and the motor unit 34 is used to prevent the belt 36 from slipping when the drum 2 rotates. There is a fundamental limit to slow acceleration or deceleration.

Therefore, conventional dryers cannot quickly change the rotation direction of the drum 2, so that the rotation of the drum 2 cannot be controlled, or it may be impossible to change the rotation direction of the drum 2.

Therefore, when a conventional laundry treatment apparatus has a structure in which a drum rotates with a belt and a pulley, it is difficult to change the speed of the drum during the drying cycle. According to the figure, a method of controlling the driving of the heat pump was taken.

For example, referring to Korean Laid-Open Patent Publication No. 10-2006-0023715, a conventional laundry treatment apparatus includes a preheating period, a constant rate drying period, and a reduced rate drying period according to the state of a heat pump and the dryness of clothes. , It is divided into cooling sections, and the temperature or air volume of the hot air supplied to the drum is controlled for each section to protect clothes.

2 shows the rotational speed of the drum when drying clothes in the conventional laundry treatment apparatus.

When the drying process is performed along a preheating section, a constant rate drying section, or a decreasing rate drying section, a conventional laundry treatment apparatus performs only a tumbling motion that allows the clothes to rise and then fall to be exposed to supplied hot air.

The tumbling motion is a motion of rotating the drum so that the clothing rises above the central area of the drum and falls below the drum in an area lower than the highest point of the drum. To this end, in the tumbling motion, the drum is rotated in a certain direction at a speed of 1 G or less, and the drying efficiency is the highest because the clothes are repeatedly exposed to the widest area to the hot air while falling apart after being attached to the inner wall of the drum. Corresponds to high motion.

However, if only the tumbling motion is applied during the drying cycle, there are problems in that clothes are damaged, such as abrasion and fluff, and shrinkage occurs, such as changes in fiber diameter and fiber spacing.

3 illustrates a problem that occurs when the tumbling motion is performed in a conventional laundry handling apparatus.

Referring to FIG. 3(a), when the tumbling motion proceeds, the clothes accommodated inside the drum 2 adhere to the inner wall of the drum 2 and rotate in a first region I, and the inner wall of the drum 2 It is disposed in any one of a second region (II) in which the surfaces of the clothes rub against each other without contacting, and a third region (III) in which the clothes are separated from the inner wall of the drum 2 and fall inside the drum 2. can

Referring to FIG. 3(b), clothes in the third area (III) of the drum may be disposed in a state separated from the inner wall of the drum 2 and exposed to hot air, as in the first state. Then, as in the second state, the clothes may come into contact with the inner wall of the drum 2 .

However, the clothing may collide with the inner wall of the drum 200 due to its own load and falling acceleration force as in the third state and be pressed against the inner wall of the drum 200 .

Therefore, the clothing disposed in the third region III may be separated from the inner wall of the drum 200 and collide again, resulting in a drop impact. As a result, there is a possibility that the fabric itself may be temporarily compressed and contracted or deformed.

Referring to FIG. 3(c), the clothes in the second region (ii) of the drum are separated from the inner wall of the drum 2, but are in contact with other clothes, or the same clothes are different from each other. are in contact with each other. At this time, when the drum 2 rotates at the second speed L1, clothes relatively close to the inner wall of the drum 2 and clothes relatively far from the inner wall of the drum 2 are separated by a difference in inertial force. may cause friction with each other. Accordingly, the clothes in the second region (ii) may rub or wear each other.

Referring to FIG. 3(d), clothes in the first area (i) of the drum may be attached to the inner wall of the drum 2 below the center O of the drum 2. When the drum 2 rotates at the second speed L1, clothes in the first region (i) cannot move simultaneously with the inner wall of the drum 2 due to inertial force, so that the first region (i) The clothes in (i) and the inner wall of the drum 2 can be rubbed against each other.

The tumbling motion may cause friction between the clothing or between areas of the clothing even if the clothing is one piece, or may cause friction between the clothing and the drum 200 . As a result, the clothing may be damaged or worn, and fluff may be generated in the clothing.

In addition, the tumbling motion may apply a fall impact to the clothes. Therefore, the clothes may be deformed or damaged by the impact, and the inner space of the clothes may be contracted so that the clothes themselves may be contracted.

As a result, the conventional clothes handling apparatus dries clothes using a tumbling motion, which is the most advantageous motion for drying clothes, but the clothes are damaged by performing the tumbling motion throughout the entire drying process without considering the condition of the clothes. There was a fundamental limitation that there was a risk of shrinking or shrinking.

4 shows the structure of a conventional laundry treatment apparatus capable of arbitrarily changing the rotational speed and rotational direction of the drum. Referring to Korean Patent Laid-Open Publication No. 10-2020-0065932, recently, in a laundry treatment apparatus that intensively performs a drying cycle, a drive unit 3 is coupled to a drum 2 to control the rotation direction and rotation speed of the drum. A clothes handling device that can be changed has appeared.

However, there was no way to mitigate the dryness variation occurring in the clothes, because there was no specific hint on how to change the rotational motion of the drum according to the state of the clothes in the drying process and how to apply it. .

An object of the present invention is to provide a laundry treatment apparatus capable of separating a plurality of clothes from each other during a drying cycle.

An object of the present invention is to provide a laundry treatment apparatus capable of changing the arrangement of clothes during a drying cycle.

An object of the present invention is to provide a laundry treatment apparatus capable of separating clothes according to differences in dryness during a drying cycle.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laundry treatment apparatus capable of inducing clothes accommodated inside a drum to be evenly dried.

An object of the present invention is to provide a laundry treatment apparatus that separates poorly dried clothes from well-dried clothes.

An object of the present invention is to provide a laundry treatment apparatus capable of shortening a drying time by uniformly drying clothes that are not well dried together with clothes that are well dried.

In order to solve the above problems, the present invention provides a laundry treatment apparatus in which a section in which the rotational speed of a drum can be periodically varied during a drying cycle is arranged.

The present invention provides a difference in inertial force to clothes by periodically varying the rotational speed of the drum, so that clothes can be separated inside the drum.

The present invention can change the arrangement of clothes inside the drum by periodically arranging an acceleration and deceleration section in the rotational speed of the drum performed in the drying cycle.

In the present invention, a period in which the rotational speed of the drum is periodically varied in two or more regions may be arranged during the drying cycle.

The varying section rotates the drum at at least two of a first speed at which the clothes rotate by adhering to the inner wall of the drum, a second speed slower than the first speed, and a third speed slower than the second speed. It may correspond to periodically varying the speed.

This rocking motion may sequentially change the speed of the drum to the second speed, the first speed, and the third speed.

The time for changing the speed of the drum in the variable interval or shaking motion can be set to be longer than the time the drum rotates once and shorter than 1 minute.

In the shaking motion, the second speed, the first speed, and the third speed may all be varied within one minute.

The shaking motion may be performed after the tumbling motion focusing on drying of clothes.

The shaking motion may be performed in the constant rate drying section or may be performed at the end of the constant rate drying section.

Also, the shaking motion may start to be performed when the dryness of the clothes reaches a target value in the constant rate drying section.

The reduced rate drying section is entered when the discharge temperature of the circulation passage rises above the reference temperature or the dryness level of the clothes reaches a set value, and the shaking motion may be performed before entering the reduced rate drying section.

The present invention has the effect of separating a plurality of clothes from each other in the drying process.

The present invention has the effect of changing the arrangement between clothes during the drying cycle.

The present invention has an effect of separating clothes according to differences in dryness during a drying cycle.

The present invention has an effect of inducing clothes accommodated inside the drum to dry evenly.

The present invention has the effect of separating poorly dried clothes from well-dried clothes.

The present invention has an effect of shortening the drying time by uniformly drying clothes that are not well dried together with clothes that are well dried.

1 shows the structure of a conventional laundry treatment apparatus.

2 illustrates a drying cycle method of a conventional laundry treatment apparatus.

3 illustrates problems of the conventional laundry treatment apparatus.

4 shows another structure of a conventional laundry treatment apparatus.

Fig. 5 shows the appearance of the laundry treatment apparatus of the present invention.

6 schematically illustrates the inside of the laundry treatment apparatus according to the present invention.

7 is an exploded perspective view illustrating internal components constituting the laundry treatment apparatus separated from each other.

8 shows the appearance of a reducer according to an embodiment of the present invention.

9 is an enlarged cross-sectional view of a driving unit in detail.

10 illustrates a base and a rear plate according to an embodiment of the present invention.

11 illustrates a coupling structure of a rear plate, a reducer, and a motor unit according to an embodiment of the present invention.

12 shows a coupling structure of a reducer and a stator according to an embodiment of the present invention from the rear.

13 illustrates coupling of a reducer and a motor unit according to an embodiment of the present invention.

14 illustrates a situation in which the clothes may be damaged or shrunk during the drying cycle.

Fig. 15 shows the change in the volume of clothes according to the change in the diameter of the fiber (L).

16 shows an embodiment in which the laundry treatment apparatus of the present invention performs a drying cycle.

17 shows the state of the inside of the heat exchanger 900 and the drum 200 when the air supply step (S1) is performed.

Fig. 18 shows that the rotation step of the laundry treatment apparatus of the present invention includes a tumbling motion.

Fig. 19 shows the state of clothes in the tumbling motion.

20 shows that the rotating step includes a pulling motion.

Fig. 21 shows the state of clothes when the clothes handling apparatus of the present invention performs a pulling motion.

Fig. 22 shows that the rotating step includes a flipping motion.

Fig. 23 shows the state of clothes when the rotating step performs a flipping motion.

Fig. 24 shows that the rotating step includes a knurling motion.

Fig. 25 shows the state of clothing when the rotating step performs a knurling motion.

Fig. 26 shows that the rotating step includes a rocking motion.

Fig. 27 shows the state of clothing when the rotating stage performs a rocking motion.

Fig. 28 shows that the rotating step includes a rolling motion.

Fig. 29 shows the state of clothing when the rotating step performs a rolling motion.

Fig. 30 shows that the rotating step includes a stop motion.

31 shows a rotation step (S2) that can be applied in the preheating section of the air supply step (S1).

32 shows a rotation step (S2) that can be applied in the constant rate drying section (A2) during the air supply step (S1).

33 shows a rotation step (S2) that can be applied in a reduced rate drying section during the air supply step (S1).

34 shows a rotation step (S2) that can be applied in the cooling section during the air supply step (S1).

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'.

5 shows the exterior of the laundry treatment apparatus of the present invention.

A laundry treatment apparatus according to an embodiment of the present invention may include a cabinet 100 forming an exterior.

The cabinet 100 may include a front panel 110 forming a front surface of the laundry handling apparatus, an upper panel 150 forming a top surface, and side panels 140 forming a side surface. The side panel 140 may include a left panel 141 forming a left side. The front panel 110 may include an opening 111 provided to communicate with the inside of the cabinet 100 and a door 130 rotatably coupled to the cabinet 100 to open and close the opening 111. there is.

An operation panel 117 may be installed on the front panel 110 . The control panel 117 may include an input unit 118 for receiving control commands from a user and a display unit 119 for outputting information such as control commands selectable by the user. The control command may include a drying course or a drying option capable of performing a series of drying cycles. A control panel may be installed inside the cabinet 100 to control an internal configuration to execute the control command input through the input unit 118 . The control panel may be connected to internal components of the laundry treatment apparatus and control the corresponding components to execute an input command.

The input unit 118 includes a power supply request unit for requesting power supply of the clothes handling apparatus, a course input unit for enabling a user to select a desired course from among a plurality of courses, and an execution request unit for requesting the start of the course selected by the user. may be provided to do so.

The display unit 119 may include at least one of a display panel capable of outputting text and figures, and a speaker capable of outputting voice signals and sounds.

Meanwhile, the laundry treatment apparatus of the present invention may include a water storage tank 120 provided to separately store moisture generated in the process of drying the laundry. The water storage tank 120 may include a handle provided to be drawn out from one side of the front panel 110 . The water storage tank 120 may be provided to collect condensed water generated during the drying process. Accordingly, the user can withdraw the water storage tank 120 from the cabinet 100 to remove the condensed water, and then install the water storage tank 120 in the cabinet 100 again. Accordingly, the laundry treatment apparatus of the present invention can be disposed even in a place where a sewer or the like is not installed.

Meanwhile, the water storage tank 120 may be disposed above the door 130 . As a result, when the user withdraws the water storage tank 120 from the front panel 110, the user can bend the waist relatively less, thereby increasing user convenience.

6 schematically illustrates the inside of the laundry treatment apparatus according to the present invention. The laundry treatment apparatus according to the present invention includes a drum 200 accommodated in the cabinet 100 and accommodating clothes, a drive unit for rotating the drum 200, and a heat exchange unit provided to supply hot air to the drum 200. 900 and a base 800 provided with a circulation passage part 820 may be included. The circulation passage part 820 is provided to communicate with the drum 200 . Air discharged from the drum 200 may be supplied to the circulation passage part 820 . In addition, the air discharged from the circulation passage unit 820 may be supplied to the drum 200 again.

The drive unit may include a motor unit 500 that provides power to rotate the drum 200 . The drive unit may be provided to be directly connected to the drum 200 so as to rotate the drum 200 . For example, the drive unit may be provided in a direct drive unit (DD) type. Accordingly, the driving unit directly rotates the drum 200 by omitting components such as belts and pulleys, thereby controlling the rotational direction of the drum 200 or the rotational speed of the drum 200 .

The motor unit 500 may rotate at high RPM. For example, the clothes inside the drum 200 may be rotated at a much higher RPM than the RPM at which clothes can be rotated while attached to the inner wall of the drum 200 .

However, if the clothes inside the drum 200 continuously stick to the inner wall of the drum 200 and rotate, drying efficiency decreases because the portion attached to the drum 200 is not exposed to hot air.

If the rotor 520 is rotated at a low RPM to be rolled or agitated inside the drum 200 without being attached to the inner wall of the drum 200, the power or torque that can be generated by the driving unit is not properly utilized. problems may arise.

Accordingly, the driving unit of the laundry treatment apparatus according to the present invention may further include a reduction gear 600 capable of increasing torque while utilizing maximum output of the motor unit 500 by reducing RPM.

In addition, the drive unit may include a drum rotation shaft 6341 connected to the drum 200 to rotate the drum 200 .

The drum 200 may be provided in a cylindrical shape to accommodate clothes. In addition, unlike a drum used for washing, water does not need to be injected into the drum 200 used only for drying, and liquid water condensed inside the drum 200 is discharged to the outside of the drum 200. don't have to be Therefore, the through hole provided along the circumferential surface of the drum 200 may be omitted. That is, the drum 200 used only for drying may be formed differently from the drum 200 used for washing.

The drum 200 may be provided in an integral cylindrical shape, but may be manufactured in a form in which a drum body 210 including a circumferential surface and a drum rear surface 220 forming a rear surface are combined.

In front of the drum body 210, an inlet 211 through which clothes enter and exit may be provided. A driving unit for rotating the drum may be connected to the rear of the drum rear surface 220 . The drum body 210 and the drum rear surface 220 may be coupled by a fastening member such as a bolt, but is not limited thereto, and if the drum body 210 and the drum rear surface 220 are coupled to rotate together, various methods can be combined using

The drum body 210 may be provided with a lift 213 that pulls the clothes inside so that the clothes accommodated inside can be mixed according to the rotation. When the drum 200 rotates, the clothes accommodated therein may repeat the process of rising and falling by the lift 213 . Clothing accommodated inside the drum 200 can be evenly contacted with hot air while repeatedly rising and falling. Therefore, there is an effect of increasing the drying efficiency and shortening the drying time.

A reinforcing bead 212 may be formed on the circumferential surface of the drum body 210 . The reinforcing beads 212 may be recessed or protruded from inside/outside along the circumferential surface of the drum 200 . Such reinforcing beads may be provided in plurality and may be provided spaced apart from each other. The reinforcing beads form a certain pattern and may be provided inside/outside the circumferential surface.

The rigidity of the drum body 210 can be increased by the reinforcing beads 212 . Therefore, even if a large amount of clothes are accommodated in the drum body 210 or a sudden rotational force is transmitted through the driving unit, the drum body 210 can be prevented from being twisted. In addition, when the reinforcing beads 212 are provided, the distance between the clothes and the inner circumferential surface can be increased compared to the case where the circumferential surface of the drum body 210 is provided with a flat surface, so that the hot air supplied to the drum 200 is more It can effectively flow between the clothes and the drum 200. There is an effect of increasing the durability of the drum and increasing the drying efficiency of the laundry treatment apparatus by the reinforcing beads.

In general, in the case of a DD-type washing machine, the driving unit is coupled to and fixed to a tub accommodating the drum 200, and the drum 200 may be coupled to the driving unit and supported by the tub. However, since the clothes handling apparatus of the present invention is provided to intensively perform the drying process, a tub fixed to the cabinet 100 to accommodate the drum 200 is omitted.

Accordingly, the laundry treatment apparatus of the present invention may further include a support part 400 provided to fix or support the drum 200 or the driving part inside the cabinet 100 .

The support part 400 may include a front plate 410 disposed in front of the drum 200 and a rear plate 420 disposed in the rear of the drum 200 . The front plate 410 and the rear plate 420 are provided in a plate shape and may be arranged to face the front and rear of the drum 200 . The distance between the front plate 410 and the rear plate 420 may be equal to or longer than the length of the drum 200 . The front plate 410 and the rear plate 420 may be fixed to and supported on the bottom surface of the cabinet 100 or the base 800 .

The front plate 410 may be disposed between the drum 200 and the front panel forming the front surface of the cabinet. In addition, the front plate 410 may be provided with an input communication hole 412 communicating with the input port 211 . Since the insertion communication hole 412 is provided in the front plate 410, clothes can be put into or taken out of the drum 200 while the front surface of the drum 200 is supported.

The front plate 410 may include a duct connection part 416 provided below the injection communication hole 412 . The duct connection part 416 may form a lower surface of the front plate 410 .

The front plate 410 may include a duct communication hole 417 penetrating the duct connection part 416 . The duct communication hole 417 is provided in a hollow shape to guide air discharged through the inlet 211 of the drum to the lower side of the drum 200 . In addition, air discharged through the drum 211 may be guided to the circulation passage unit 820 located at the bottom of the drum 200 .

A filter unit (not shown) may be installed in the duct communication hole 417 to filter out lint or foreign substances having large particles generated from clothes. The filter unit has an effect of filtering air discharged from the drum 200 to prevent foreign substances from accumulating inside the laundry treatment apparatus and from interfering with air circulation due to accumulation of foreign substances.

Since the inlet 211 is disposed at the front, it is preferable that the drive unit is installed on the rear plate 420 rather than the front plate 410 . The driving unit may be provided to be mounted on and supported by the rear plate 420 . Thus, the drive unit can rotate the drum 200 in a state where its position is stably fixed through the rear plate 420 .

At least one of the front plate 410 and the rear plate 420 may rotatably support the drum 200 . At least one of the front plate 410 and the rear plate 420 may rotatably accommodate a front end or a rear end of the drum 200 .

For example, the front of the drum 200 may be rotatably supported by the front plate 410, and the rear of the drum 200 is spaced apart from the rear plate 420, but the rear plate 420 It may be connected to the motor unit 500 mounted on the rear plate 420 and indirectly supported by the rear plate 420 . Accordingly, an area where the drum 200 contacts or rubs against the support part 400 is minimized, and unnecessary noise or vibration may be prevented from occurring.

Of course, the drum 200 may be rotatably supported by both the front plate 410 and the rear plate 420 .

One or more support wheels 415 supporting the front of the drum 200 may be provided below the front plate 410 . The support wheel 415 may be rotatably provided on the rear surface of the front plate 410 . The support wheel 415 may rotate while being in contact with the lower part of the drum 200 .

When the drum 200 is rotated by the driving unit, the drum 200 may be supported by the drum rotation shaft 6341 connected to the rear. When clothes are accommodated in the drum 200, a load applied to the drum rotating shaft 6341 by the clothes may increase. Therefore, there is a risk that the drum rotating shaft 6341 is bent under a load.

When the support wheel 415 supports the front lower part of the drum 200, the load applied to the drum rotation shaft 6341 can be reduced. Therefore, it is possible to prevent the drum rotation shaft 6341 from being bent and to prevent noise from being generated due to vibration.

The support wheels 415 are provided at symmetrical positions with respect to the center of rotation of the drum 200 to support the load of the drum 200 . It is preferable that the support wheels 415 are provided at the left and right lower portions of the drum 200 to support the drum 200 . However, it is not limited thereto, and a larger number of support wheels 415 may be provided according to the operating environment of the drum 200 .

The circulation passage part 820 provided in the base 800 may form a passage through which air inside the drum 200 is circulated and introduced into the drum 200 again.

The circulation passage part 820 includes an inlet duct 821 into which air discharged from the drum 200 is introduced, a discharge duct 823 which supplies air to the drum 200, the inlet duct 821 and the discharge duct ( A moving duct 822 connecting the 823 may be included.

When air is discharged from the front of the drum 200, the moving duct 822 may be located on the front side of the circulation passage part 820. Also, the discharge duct 823 may be located at a rear side of the circulation passage part 820 .

The exhaust duct 823 may further include a blowing unit 8231 for discharging air to the outside of the circulation passage unit 820 . The blower 8231 may be provided at a rear side of the discharge duct 823 . Air discharged through the blower 8231 may move to the drum 200 .

A duct cover part 830 is coupled to the upper side of the circulation passage part 820 to partially shield the open upper surface of the circulation passage part 820 . The duct cover part 830 can prevent air from leaking out of the circulation passage part 820 . In other words, the duct cover part 830 may form one side of a passage through which air circulates.

In addition, the heat exchange part 900 provided in the base 800 is provided inside the circulation passage part 820 and is provided inside the first heat exchanger 910 for cooling air and the circulation passage part 820 A second heat exchanger 920 for heating the air cooled by the first heat exchanger 910 may be included.

The first heat exchanger 910 may dehumidify the air discharged from the drum 200, and the second heat exchanger 920 may heat the dehumidified air. The heated air may be supplied to the drum 200 again to dry clothes accommodated in the drum 200 .

The first heat exchanger 910 and the second heat exchanger 920 may be provided as heat exchangers through which a refrigerant flows. When provided as a heat exchanger through which refrigerant flows, the first heat exchanger 910 may be provided as an evaporator, and the second heat exchanger 920 may be provided as a condenser. The refrigerant moving along the first heat exchanger 910 and the second heat exchanger 920 may be provided to exchange heat with air discharged from the drum 200 .

The heat exchange unit 900 may include a circulation flow path fan 950 installed in the circulation path unit 820 to generate air flow inside the circulation path unit 820 . In addition, the heat exchange unit 900 may further include a circulation flow path fan motor 951 for rotating the circulation flow path fan 950 . The circulation flow path fan 950 may be rotated by receiving rotational power from the circulation flow path fan motor 951 . When the circulation flow fan 950 operates, air dehumidified in the first heat exchanger 910 and heated in the second heat exchanger 920 may move to the rear of the drum 200 .

The circulation flow fan 950 may be installed in any one of the inflow duct 821, the movement duct 822, and the discharge duct 823. Since the circulation flow fan 950 is provided to rotate, noise may be generated when the circulation flow fan 950 operates. Therefore, it is preferable that the circulation passage fan 950 is disposed behind the circulation passage part 820 .

The circulation flow fan 950 may be installed in the blowing unit 8231. In addition, the circulation flow path fan motor 951 may be located behind the blowing unit 8231. When the circulation passage fan 950 is rotated by the circulation passage fan motor 951, the air inside the circulation passage part 820 is discharged to the outside of the circulation passage part 820 through the blowing part 8231. It can be.

Since the inlet 211 of the drum 200 is preferably disposed at a relatively high position so that the user can easily withdraw clothes located inside the drum 200, the circulation passage part 820 and the heat exchange part 900 may be preferably disposed below the drum 200.

A rear plate 420 for guiding the air discharged from the circulation passage part 820 to the drum 200 may be provided at the rear of the drum 200 . The rear plate 420 may be provided to be spaced apart from the drum rear surface 220 . The circulation passage part 820 may receive air inside the drum 200 through the front plate 410 and supply air to the drum 200 through the rear plate 420 . The air discharged from the circulation passage part 820 may pass through the rear plate 420 and be guided to the drum 200 .

The base 800 may further include a connector 850 guiding air discharged from the circulation passage part 820 to the rear plate 420 . The connector 850 may guide the discharged air to evenly spread throughout the rear plate 420 .

The connector 850 may be installed in the blowing unit 8231. That is, the connector 850 may guide the air discharged from the blower 8231 to the rear plate 420 . The hot air supplied to the rear plate 420 may flow into the drum 200 through the rear surface 220 of the drum.

The drum 200 of the laundry treatment apparatus of the present invention is not rotated indirectly by being coupled to a belt or the like, but can be directly connected to and rotated by a drive unit located at the rear of the drum 200. Therefore, unlike conventional drums of dryers having a cylindrical shape with open front and rear ends, the rear of the drum of the laundry treatment apparatus of the present invention is shielded and can be directly coupled to the driving unit.

As described above, the drum 200 includes a drum body 210 provided in a cylindrical shape and accommodating clothes, and a drum rear surface 220 coupled to the rear of the drum body 210 to form the rear surface of the drum. can include

The drum rear surface 220 is provided to shield the rear of the drum body 210 and may provide a coupling surface directly coupled to the driving unit. That is, the drum rear surface 220 may be connected to the driving unit to receive rotational power and rotate the entire drum 200 . As a result, the front of the drum body 210 is formed with an inlet 211 through which clothes are put in, and the rear of the drum body 210 can be shielded by the rear surface 220 of the drum.

The drum rear surface 220 may be provided with a bushing unit 300 connecting the driving unit and the drum rear surface 220 . The bushing part 300 may be provided on the rear surface 220 of the drum to form a center of rotation of the drum 200 . The bushing part 300 may be provided integrally with the drum rear surface 220, but may be provided with a material having greater rigidity or durability than the drum rear surface 220 in order to be firmly coupled to the rotation shaft that transmits power. there is. The bushing part 300 may be seated on and coupled to the rear surface 220 of the drum so as to form the same axis as the center of rotation of the rear surface 220 of the drum.

The drum rear surface 220 may include a circumferential portion 221 coupled to the outer circumferential surface of the drum body 210 and a mounting plate 222 provided inside the circumferential portion 221 and coupled to the driving unit. can The bushing part 300 may be seated and coupled to the mounting plate 222 . The rotary shaft that rotates the drum is coupled to the mounting plate 222 through the bushing 300 and has an effect of being more firmly coupled. In addition, deformation of the drum rear surface 220 can be prevented.

The drum rear surface 220 may include a suction hole 224 that is formed through the circumference portion 221 and the mounting plate 222 to communicate with the front and rear surfaces of the drum rear surface 220 . The hot air supplied through the circulation passage part 820 may be introduced into the drum body 210 through the suction hole 224 . The suction hole 224 may be provided with a plurality of holes provided through the drum rear surface 220 or may be provided with a mesh (MESH) type of mesh.

A driving unit for rotating the drum 200 may be positioned behind the rear plate 420 . The drive unit may include a motor unit 500 that generates rotational power and a reducer 600 that reduces rotational force of the motor unit 500 and transmits it to the drum 200 .

A motor unit 500 may be disposed behind the rear plate 420 . Also, the motor unit 500 may be coupled to the rear of the rear plate 420 through the reduction gear 600 .

The reduction gear 600 may be fixed to the rear surface of the rear plate 420, and the motor unit 500 may be coupled to the rear surface of the reduction gear 600. That is, the rear plate 420 may provide a support surface on which the reduction gear 600 or the motor unit 500 is supported. However, it is not limited thereto, and the motor unit 500 may be coupled to the rear plate 420 .

A laundry treatment apparatus according to an embodiment of the present invention includes a drum 200 accommodating clothes, a front plate 410 supporting the front surface of the drum, a rear plate 420 positioned at the rear of the drum, and a lower part of the drum. A base 800 provided to provide a space in which air inside the drum is circulated or moisture contained in the air is condensed, a

motor unit

510, 520, 540 located at the rear of the drum to provide rotational power to the drum, It may include a reduction gear 600 that reduces rotation of the motor unit and transmits it to the drum, and a rear cover 430 that is coupled to the rear plate 420 and prevents the motor unit from being exposed to the outside.

The base 800 may include a circulation passage part 820 communicating with the drum 200 to allow air to flow in from the drum or to discharge air to the drum.

The front plate 410 may include a front panel 411 forming a front surface and an input communication hole 412 formed to pass through the front panel 411 and communicate with the drum 200 . The front plate 410 is provided on the rear surface of the front panel 411, and is provided to surround the outside of the input communication hole 412 in the radial direction, and includes a front gasket 413 accommodating a part of the drum body 210. may be provided.

The front gasket 413 may rotatably support the drum body 210 and may be provided to be in contact with an outer circumferential surface or an inner circumferential surface of the inlet 211 . The front gasket 413 can prevent hot air inside the drum 200 from leaking between the drum body 210 and the front plate 410 . The front gasket 413 may be made of a plastic resin or an elastic material, and a separate sealing member is additionally coupled to the front gasket 413 so that clothing or hot air from the drum body 210 is blown away from the front plate 410. ) can be prevented from escaping.

Meanwhile, the front plate 410 may include a duct communication hole 417 provided through an inner circumferential surface of the insertion communication hole 412 . In addition, the front plate 410 may include a duct connection portion 416 extending downward from the duct communication hole 417 to form a flow path communicating with the drum body 210 and the circulation passage portion 820 .

The duct connection portion 416 may communicate with the drum body 210 through the duct communication hole 417, and the air discharged from the drum body 210 passes through the duct communication hole 417 to the duct connection portion 416. It flows into and can be guided to the circulation passage part 820. Since the air discharged from the drum body 210 is guided to the circulation passage part 820 by the duct connection part 416, there is an effect of preventing the air inside the drum from leaking.

A filter member (not shown) may be installed in the duct connection part 416 to filter foreign substances or lint from the air discharged from the drum 200 and prevent foreign substances from entering the circulation passage part 820 .

The front plate 410 is rotatably installed on the rear surface of the front panel 411 and a support wheel 415 supporting the lower part of the drum 200 may be installed. The support wheel 415 supports the front of the drum 200 to prevent bending of the rotating shaft connected to the drum.

The front plate 410 is provided to penetrate the front panel 411 and has a storage tank support hole 414 through which the storage tank 120 (see FIG. 1) in which condensate generated in the drying process is stored can be drawn out or supported. may be provided. When the water storage tank support hole 414 is provided on the upper side, there is an effect of increasing user convenience because the user does not have to bend the waist when withdrawing the water storage tank.

The drum 200 accommodating clothes may include a drum body 210 provided with an inlet 211 through which clothes enter and exit the front side, and a drum rear surface 220 forming a rear side.

The drum rear surface 220 includes a circumferential portion 221 connected to the drum body 210, a suction hole 224 formed to penetrate the drum rear surface 220 from the inside of the circumferential portion 221, and a drum rear surface ( 220) may include a mounting plate 222 provided at the center of rotation and coupled to the rotation shaft. Air may be introduced to the rear of the drum through the suction hole 224 .

The drum rear surface 220 may further include a reinforcing rib 225 extending from the circumferential portion 221 toward the center of rotation. The reinforcing rib 225 may extend avoiding the suction hole 224 . The reinforcing rib 225 has an effect of preventing the reduction in rigidity of the drum rear surface 220 due to the suction hole 224 . The reinforcing rib 225 may be radially extended from the outer circumferential surface of the mounting plate 222 toward the inner circumferential surface of the circumferential portion 221 .

In addition, the drum rear surface 220 may further include a circumferential rib 227 extending in a circumferential direction of the drum rear surface 220 to connect the reinforcing ribs 225 to each other. The suction hole 224 may be disposed between the reinforcing rib 225, the circumferential rib 227, and the circumferential portion 221. The reinforcing rib 225 and the circumferential rib 227 have an effect of preventing the drum rear surface 220 from being deformed even when rotational force is transmitted from the motor unit 500 .

The inflow duct 821 may communicate with the duct communication hole 417 of the front plate 410 and communicate with a flow path installed inside the front plate 410 . The moving duct 822 may be provided extending from the end of the inlet duct 821 toward the rear of the drum 200, and the discharge duct 823 is provided at the end of the moving duct 822 It may be provided to guide the air to the drum 200.

The blowing unit 8231 may be positioned downstream of the discharge duct 823, and the blowing unit 8231 may provide a space in which a circulation flow fan is installed. When the circulation fan passage fan operates, air introduced into the inlet duct 821 may be discharged to the upper part of the blower 8231.

Meanwhile, a heat exchange unit 900 capable of cooling and heating air circulating inside the drum 200 may be installed in the base 800 . The heat exchange unit 900 may include a compressor 930 connected to the first heat exchanger and the second heat exchanger to supply compressed refrigerant. The compressor 930 may be provided so as not to directly exchange heat with circulated air, and may be located outside the circulation passage part 820 .

In addition, the heat exchanging unit may include a circulation flow path fan motor 951 supported at the rear of the blowing unit 8231 to rotate the circulation flow path fan. The circulation passage fan motor 951 may be coupled to the rear of the blower 8231.

Meanwhile, the laundry treatment apparatus according to an embodiment of the present invention is coupled to the circulation passage part 820 and directs the hot air discharged from the circulation passage part 820 to the rear of the drum 200 or the rear plate 420. A connector 850 leading to may be further included.

The connector 850 may be disposed above the discharge duct 823 to guide the hot air heated through the second heat exchanger 920 upward from the discharge duct 823 . Also, the connector 850 may be coupled to an opening provided on the upper side of the blowing unit 8231.

The connector 850 may be provided to form a flow path therein. The connector 850 may be provided to evenly guide the flow of air generated by the circulation passage fan to the rear plate 420 . That is, the connector 850 may be provided so that the area of the flow path increases as the distance from the blower 8231 increases.

The rear plate 420 may be coupled to the base 800 or supported by the base 800 and positioned at the rear of the drum 200 . The rear plate 420 is provided to be recessed in the rear panel 421 positioned facing the front plate 410 and the rear panel 421 to form a passage through which air flows, and in the circulation passage part 820 A duct unit 423 provided to guide the discharged air to the drum may be included.

The rear plate 420 may include a mounting part 425 to which the driving part is coupled or supported. The mounting part 425 may be provided to pass through the rear panel 421 and may be disposed on an inner circumferential surface of the duct part 423 . The mounting part 425 may be spaced radially inward from the inner circumferential surface of the duct part 423 .

Here, the drive unit may mean a combination of the reducer 600 and the motor unit 500 as described above. And, the driving unit may mean only the motor unit 500 . That is, a configuration that generates power and transmits rotational power to the drum may be referred to as a driving unit.

The driving unit may be mounted on the mounting unit 425 . The mounting part 425 may support the load of the driving part. The driving unit may be connected to the drum 200 while being supported by the mounting unit 425 .

The duct part 423 may be provided to accommodate a part of the rear surface 220 of the drum. The duct part 423 may form a passage through which air moves together with the drum rear surface 220 .

The driving unit may be installed on the mounting unit 425 to prevent interference with the duct unit 423 . in other words. The driving unit may be disposed radially inwardly spaced from the inner circumferential surface of the duct unit 423 . The driving unit is installed on the mounting unit 425 and installed so that its rear side is exposed to the outside so that it can be cooled by external air.

The drive unit may include a motor unit 500 that provides power for rotating the drum 200 . The motor unit 500 may include a stator 510 generating a rotating magnetic field and a rotor 520 rotated by the stator 510 .

The rotor 520 may be provided as an outer rotor type provided to accommodate the stator 510 and rotate along the circumference of the stator 510 . At this time, a drive shaft may be coupled to the rotor 520 and may be directly connected to the drum 200 through the stator 510 and the mounting portion 425 . In this case, the rotor 520 may directly transmit power for rotating the drum 200 .

The rotor 520 may be coupled to the driving shaft through the washer part 540 . The washer unit 540 may perform a function of connecting the driving shaft and the rotor 520. Since the contact area between the rotor 520 and the drive shaft can be increased by the washer unit 540, rotation of the rotor 520 can be transmitted more effectively.

The reducer 600 may be provided to connect the motor unit 500 and the drum 200. The reducer 600 may rotate the drum 200 by converting power of the motor unit 500 . The reducer 600 may be disposed between the motor unit 500 and the drum 200 to receive power from the motor unit 500 and convert it to transfer to the drum 200 . The reducer 600 may be provided to convert the RPM of the rotor into a small RPM, but increase the torque value and transmit it to the drum 200 .

Specifically, the reducer 600 may be coupled to a drive shaft that is coupled to the rotor 520 and rotates together with the rotor 520 . The reducer 600 includes a gear coupling body capable of rotating in engagement with the driving shaft to change the rpm of the driving shaft while increasing torque, and the gear coupling body is coupled to the drum 200 to rotate the drum. It can be connected to the rotation axis. Therefore, when the drive shaft 530 rotates, the drum rotation shaft rotates at a slower rpm than the drive shaft, but can rotate at a higher torque.

The performance of the reducer 600 may depend on whether the drive shaft and the drum rotation shaft can maintain coaxiality. That is, when the drive shaft and the drum rotation shaft are twisted, there is a risk that the parts constituting the gear coupling body inside the reducer 600 become loose or disconnected from at least one of the drive shaft and the drum rotation shaft. Therefore, the power of the driving shaft may not be properly transmitted to the drum rotating shaft or the driving shaft may idle.

In addition, if the drive shaft and the drum rotation shaft are distorted even temporarily, gears inside the reduction gear 600 may shift and collide with each other, causing unnecessary vibration or noise.

In addition, when the angle at which the driving shaft and the drum rotating shaft are distorted even temporarily increases, there is a risk that the reduction gear 600 is completely out of position or damaged.

In order to prevent this, it is preferable that clothes handling apparatuses equipped with a speed reducer fix the speed reducer 600 and the motor unit 500 to a support that maintains its original state without deformation even when an external force is generated.

For example, in the case of a washing machine, the tub accommodating the drum is primarily fixed to a cabinet, and then the motor unit and the reducer are installed in a bearing housing made of a rigid body embedded in the tub by injection molding. A differential fixation method can be applied. Accordingly, even when considerable vibration occurs in the tub, the reducer and the drive unit may tilt or vibrate together with the bearing housing or the fixed steel plate. As a result, an effect in which the reduced state and the drive unit itself are always maintained in a coupled state can be derived, and a state in which the drive shaft and the rotation shaft are coaxial can be maintained.

However, since the laundry treatment apparatus of the present invention is provided as a dryer, the configuration of the tub fixed inside the cabinet is omitted. Also, since the rear panel of the cabinet is made of a relatively thin plate, even if the stator 510 is fixed, the rear panel can easily vibrate or bend due to a repulsive force when the rotor 520 rotates. If the rear panel vibrates or is bent even temporarily, a problem may occur in which the rotational centers of the reducer 600 coupled to the drum 200 and the motor unit 500 are displaced from each other.

In addition, since the rear panel is made of a thin steel plate, it may be difficult to support both the reduction gear 600 and the motor unit 500. For example, when the reduction gear 600 and the motor unit 500 are coupled to the rear panel side by side, rotational moment is generated due to the total length and weight of the reduction gear 600 and the motor unit 500. As a result, a problem in which the reducer 600 sags downward may occur. As a result, the drum rotating shaft itself coupled to the drum may be distorted with the reduction gear 600, so that coaxiality with the driving shaft may not be maintained.

Meanwhile, it may be considered that the motor unit 500 is supported by the stator 510 being coupled to the rear plate 420 . When a large amount of clothes are accommodated in the drum 200 or when eccentricity occurs, the drum rotating shaft may be twisted according to the arrangement of the clothes whenever the drum 200 rotates. At this time, since the stator 510 is separated from the drum 200 and fixed to the rear plate 420, the drum rotating shaft may vibrate at a different width or tilt at a different angle than the stator 510. Therefore, coaxiality of the drum rotation shaft and the driving shaft may not be maintained.

From another point of view, the position of the drum 200 supported and installed by the front plate 410 and the rear plate 420 may be fixed to a certain level. Therefore, the position of the drum rotating shaft coupled to the drum 200 can also be fixed to a certain level. Therefore, even if vibration occurs in the drum 200 , the vibration can be buffered by at least one of the front plate 410 and the rear plate 420 .

However, when the vibration generated in the drum 200 is transmitted to the motor unit 500, even if the reducer 600 and the motor unit 500 are fixed to the rear plate 420, the drum rotation shaft A vibration amplitude at which the motor unit 500 and the rear plate 420 vibrate may be greater than a vibration range at which the motor unit 500 and the rear plate 420 vibrate. Even at this time, a problem in which the driving shaft and the drum rotating shaft cannot maintain coaxiality may occur.

To solve this problem, in the laundry treatment apparatus of the present invention, the motor unit 500 may be coupled to the reduction gear 600 to be fixed. In other words, the reducer 600 itself may serve as a reference point for the entire driving unit. That is, the reducer 600 may serve as a reference for the amount of vibration and inclination angle of the entire drive unit.

Since the motor unit 500 is fixed only to the reduction gear 600 and not to other components of the laundry handling apparatus, when vibration or external force is transmitted to the driving unit, the reduction gear 600 tilts or vibrates. When doing so, the motor unit 500 may always tilt or vibrate simultaneously with the reduction gear 600.

As a result, the reduction gear 600 and the motor unit 500 can form one vibration system, and the reduction gear 600 and the motor unit 500 do not move relative to each other and are in a fixed state. can be maintained

Among the motor units 500, the stator 510 may be directly coupled to and fixed to the reduction gear 600. Accordingly, the location at which the driving shaft 530 is installed relative to the reduction gear 600 may not be varied. The center of the drive shaft 530 and the center of the reducer 600 may be aligned with each other, and the drive shaft 530 may rotate while maintaining the same axis as the center of the reducer 600. .

The first axis M1 may refer to an imaginary line extending in the forward and backward directions along the rotational center of the drum 200 . That is, the first axis M1 may be provided parallel to the X axis.

The second axis M2 and the third axis M3 may refer to imaginary lines extending upward from the front to the rear of the laundry treatment apparatus. That is, the second axis M2 and the third axis M3 may be provided parallel to the XZ plane or orthogonal to the Y axis.

The first shaft M1 and the second shaft M2 may cross each other in the reducer 600 . Also, the first axis M1 and the third axis M3 may intersect at the mounting portion 425 .

The reducer 600 and the motor unit 500 may be designed to be disposed along a first axis M1 parallel to the ground when there is no load on the drum 200 or when the motor unit 500 does not operate. there is.

However, when vibration occurs in the drum 200 or the motor unit 500, the vibration is transmitted to the reducer 600 and the reducer 600 tilts, so that the reducer 600 temporarily moves the second shaft ( M2) can be inclined.

At this time, since the motor unit 500 is coupled to the reduction gear 600, it may vibrate or tilt along with the reduction gear 600. Accordingly, the motor unit 500 may be disposed parallel to the reduction gear 600 on the second shaft M2. Accordingly, the drive shaft and the drum rotation shaft may be arranged side by side along the second shaft M2.

As a result, even if the reduction gear 600 is tilted, the motor unit 500 can move integrally with the reduction gear 600, and the driving shaft and the drum rotating shaft can maintain the same axis.

The reducer 600 may be coupled to and fixed to the rear plate 420 . In this case, since the reducer 600 tilts or vibrates while being coupled to the rear plate 420, the rear plate 420 is the reducer 600, the motor unit 500, and the drum 200 It can be seen that it plays the role of the center of the vibration system including Even in this case, the motor unit 500 may be coupled and fixed only to the reduction gear 600 without being directly coupled to the rear plate 420 .

The speed reducer 600, the motor part 500, and the drum 200 are arranged side by side along the first axis M1, and the vibration of the drum 200 or the motor part 500 causes the speed reducer 600 may be inclined in parallel with the third axis M3. The third shaft M3 may pass through the reducer 600 coupled to the rear plate 420 . At this time, since the reduction gear 600 and the motor unit 500 are coupled, the motor unit 500 may also be inclined parallel to the third axis M3 in the same way as the reduction gear 600.

Eventually, the motor unit 500 and the drum 200 are coupled to the reducer 600, so that the motor unit 500 and the drum 200 are inclined side by side with respect to the reducer 600 or can vibrate at the same time.

The meaning of coaxiality and coincidence described above does not mean physically perfect coaxiality and coincidence, but a concept that allows an error range that can be recognized mechanically or a level range that can be recognized as coaxial or coincident by a person skilled in the art. For example, a range in which the drive shaft 530 and the drum rotation shaft 6341 are twisted within 5 degrees may be defined as being coaxial or coincident. However, this angular value is only an example, and an allowable error in design may be changed.

Since the drive shaft 530 rotates with respect to the reducer 600 but is fixed to prevent tilting, and the stator 510 is also fixed to the reducer 600, the stator 510 and the rotor ( 520) can always be maintained. As a result, collision between the stator 510 and the rotor 520 can be prevented, and noise or vibration that may occur due to a change in the center of rotation of the rotor 520 while rotating the stator 510 is fundamentally reduced. can be blocked by

The drum rotation shaft 6341 is provided to extend from the inside of the reducer 600 toward the drum 200, and can vibrate with the reducer 600 and tilt together with the reducer 600. That is, the drum rotation shaft 6341 is provided to rotate in the reduction gear 600, and the installed position may be fixed. As a result, the drum rotation shaft 6341 and the drive shaft 530 can always be arranged side by side and form a coaxial shaft. In other words, the center of the drum rotating shaft 6341 and the center of the drive shaft 530 may be maintained in a matched state.

Meanwhile, a sealing part 450 may be provided between the drum rear surface 220 and the rear plate 420 . The sealing part 450 is installed between the drum rear surface 220 and the rear plate 420 so that the air introduced into the duct part 423 of the rear plate 420 does not flow out and flows into the suction hole 224. can be sealed.

The sealing part 450 may be respectively disposed on an outer surface and an inner surface of the duct part 423 . A first seal 451 may be provided outside the duct part 423 in the radial direction, and a second seal 452 may be provided inside the duct part 423 in the radial direction. The first seal 451 can prevent the hot air from leaking outward in the radial direction between the drum rear surface 220 and the duct unit 423, and the second seal 452 is It is possible to prevent hot air from flowing out between the duct parts 423 in the radial direction.

In other words, the sealing part 450 may be disposed on the outside and inside of the suction hole 224 in the radial direction, respectively. The first seal 451 may be provided outside the suction hole 224 in the radial direction, and the second seal 452 may be provided inside the suction hole 224 in the radial direction.

It is preferable that the sealing part 450 is provided in contact with both the drum rear surface 220 and the rear plate 420 in order to prevent hot air from leaking out. Since the drum 200 rotates during the operation of the laundry treatment machine, continuous friction is applied to the sealing part 450 by the rear surface 220 of the drum. Therefore, it is preferable that the sealing part 450 is made of a material capable of sealing between the drum rear surface 220 and the duct part 423 without deteriorating its performance even with frictional force and frictional heat generated by rotation.

Meanwhile, a motor unit 500 or a reducer 600 may be coupled to the rear of the rear plate 420. Since the rear plate 420 may be formed of a thin steel plate material, the reducer 600 and the drum 200 There is a possibility that bending or deformation may occur due to the load transmitted to the reducer 600 by the. That is, the rigidity of the rear plate 420 needs to be secured in order to install the reduction gear 600, the motor unit 500, and the like.

To this end, the rear plate 420 may further include a bracket 700 for reinforcing coupling rigidity. A bracket 700 may be additionally coupled to the rear plate 420 , and the reduction gear 600 and the motor unit 500 may be coupled to the rear plate 420 by the bracket 700 .

The reducer 600 may be coupled to the bracket 700 and the rear plate 420 at the same time. The speed reducer 600, the rear plate 420, and the bracket 700 may be simultaneously penetrated and coupled by using a fastening member. Rigidity of the rear plate 420 may be secured by being coupled with the bracket 700 . The reduction gear 600 and the motor unit 500 may be coupled to the rear plate 420 having rigidity.

The reduction gear 600 may be first coupled to the bracket 700, and then the bracket 700 may be coupled to the rear plate 420. That is, the reducer may be fixed to the rear plate 420 through the bracket 700 without being directly coupled to the rear plate 420 .

Meanwhile, when the motor unit 500 or the reduction gear 600 is coupled to the rear of the rear plate 420, the motor unit 500 and the reduction gear 600 may be exposed to the outside. Therefore, it is necessary to prevent the motor unit 500 from being coupled to the rear of the rear plate 420 and exposed. Also, the duct part 423 may be heated by hot air. Therefore, it may be necessary to insulate the rear surface of the duct unit 423.

The rear cover 430 is coupled to the rear of the rear plate 420 to prevent the duct unit 423 and the motor unit 500 or the reduction gear 600 from being exposed to the outside. The rear cover 430 may be disposed apart from the duct part 423 and the driving part.

The rear cover 430 has an effect of preventing the motor unit 500 from being damaged due to external interference or reducing drying efficiency due to heat loss occurring through the duct unit 423 .

*The reducer 600 may include

reducer housings

610 and 620 forming an external appearance. The reducer housing may include a first housing 610 provided to face the drum and a second housing 620 facing the motor unit.

The reducer 600 may include a gearbox. The gearbox may be provided to receive power from the motor unit and convert the RPM of the motor unit to a small RPM, but increase a torque value and transmit it to the drum. Most of the gearbox is accommodated inside the second housing 620, and the first housing 610 may be provided to shield the inside of the reducer 600. Thus, the overall thickness of the reducer 600 can be reduced. A detailed configuration of the gearbox will be described later.

The first housing 610 extends in a direction away from the second housing 620 from the first housing blocking body 611 provided to shield the second housing 620 and the first housing blocking body 611. It may include a first housing bearing portion 612 to be. The first housing bearing part 612 can accommodate the drum rotation shaft 6341 and can rotatably support the drum rotation shaft 6341 .

The first housing 610 may include a stator coupling part 613 provided to support the motor part. The stator coupling part 613 may be provided by extending in a direction away from the first housing bearing part 612 on the circumferential surface of the first housing blocking body 611 .

The stator coupling portion 613 may include a stator coupling hole 615 to which the motor unit may be coupled. The stator coupling hole 615 may be recessed in the stator coupling portion 613 . A separate fastening member may be inserted into the stator fastening hole 615 . The stator coupling unit 613 and the motor unit may be coupled using the fastening member.

The first housing 610 may further include a coupling guide 614 for guiding coupling of the motor unit. The coupling guide 614 may be provided to extend in a direction away from the first housing bearing part 612 on the circumferential surface of the first housing blocking body 611 . The coupling guide 614 may extend from the first housing blocking body 611 to be connected to the stator coupling portion 613 . The coupling guide 614 may guide the position of the stator 510 when the stator 510 is coupled to the stator coupling part 613 . Through this, assemblability can be improved.

Referring to FIG. 8 , the second housing 620 may accommodate a gear coupling body therein. In general, the gearbox coupled to the reducer 600 may include a sun gear, a planetary gear that revolves around the sun gear, and a ring gear that receives the planetary gear and induces the planetary gear to rotate. The second housing 620 extends from the second housing coupling body 621 coupled to the first housing 610 in a direction away from the first housing 610 from the second housing coupling body 621 to form a gearbox. A second housing blocking body 622 forming a space in which is accommodated, and a second housing extending away from the first housing 610 from the inner circumferential surface of the second housing blocking body 622 to support the driving shaft 530. It may include a shaft part.

The center of the first housing 610 and the center of the second housing 620 may be designed to be disposed coaxially. It is advantageous for power transmission that the drive shaft 540 and the drum rotation shaft 6341 are coaxially positioned. Therefore, it is preferable that the first housing bearing part 612 rotatably supporting the drum rotating shaft 6341 and the second housing bearing part rotatably supporting the driving shaft 540 are coaxially coupled.

The drive shaft 530 may be inserted into the second housing 620 and rotatably supported inside the second housing 620 . A washer part 540 rotatably supporting the rotor 520 may be coupled to the driving shaft 530 . The washer part 540 extends radially from the outer circumferential surface of the receiving body 542 in which the shaft support hole 543 in which the drive shaft 530 is accommodated is formed in the center to form a surface to which the rotor is coupled. It may include a washer coupling body 541 to. The shaft support hole 543 may have a groove shape corresponding to the protrusion so that the protrusion formed on the outer circumferential surface of the drive shaft 530 can be coupled.

The washer unit 540 may include one or more washer coupling protrusions 5411 provided to protrude from the washer coupling body 541 in a direction away from the reducer. In addition, the washer unit 540 may include one or more washer coupling holes 5412 penetrating the washer coupling body 541 .

The washer coupling protrusion 5411 may be coupled to an accommodation groove formed in the rotor. The washer coupling hole 5412 may be used to couple the rotor and the washer part 540 by inserting a fastening member penetrating the rotor.

The washer coupling protrusion 5411 and the washer coupling hole 5412 may be alternately positioned along the circumferential direction on the surface of the washer coupling body 541 and provided in plurality.

9 is an enlarged cross-sectional view of a driving unit in detail.

The driving unit may include a motor unit 500 that generates rotational power and a reducer that reduces the rotational speed of the motor unit 500 and transfers it to the drum. The reducer 600 may include a drum rotation shaft 6341 for rotating the drum.

The motor unit 500 may include a stator 510 receiving external power and generating a rotating magnetic field, and a rotor 520 provided to surround an outer circumferential surface of the stator 510 . A permanent magnet may be disposed on an inner circumferential surface of the rotor 520 .

The permanent magnet located on the inner circumferential surface of the rotor 520 can move in a specific direction by the rotating magnetism generated by the stator 510, and the permanent magnet can be fixed to the inner circumferential surface of the rotor 520. Therefore, the rotor 520 can rotate by the rotating magnetic field of the stator 510 .

A drive shaft 530 that rotates with the rotor 520 and transmits rotational power of the rotor 520 may be coupled to the rotation center of the rotor 520 . The driving shaft 530 may be provided to rotate together with the rotor 540 . The driving shaft 530 may be coupled to the rotor 540 through a washer part 540 .

The drive shaft 530 may be directly connected to the rotor 520, but when connected through the washer part 540, it can be more firmly coupled to the rotor 520, so that the rotational force of the rotor 520 can be more effectively can be conveyed In addition, there is an effect of increasing durability of the drive shaft 530 by preventing a load from being intensively applied to the drive shaft 530 .

The drive shaft 530 may be directly connected to the drum, but since the drive shaft 530 rotates at the same speed as the rotation speed of the rotor 520, deceleration may be required. Accordingly, the drive shaft 530 may be connected to the reducer, and the reducer may be connected to the drum. That is, the reducer may reduce the rotation of the driving shaft 530 to rotate the drum.

The reducer 600 may include a first housing 610 and a second housing 620 forming an exterior and a gear box 630 that reduces power of the drive shaft 530 . The second housing 620 may provide a space for accommodating the gear box 630, and the first housing 610 may shield the accommodation space provided by the second housing 620.

The second housing 620 extends backward from the second housing coupling body 621 coupled to the first housing 610 and the inner circumferential surface of the second housing coupling body 621 to form an accommodation space, and the gearbox ( 630) and a second housing bearing portion 623 extending rearward from the second housing blocking body 622 and accommodating the drive shaft 530. .

The gear box 630 may include a ring gear 633 installed along the inner circumferential surface of the second housing blocking body 622 . One or more planetary gears 632 gear-coupled with the ring gear 633 may be provided on an inner circumferential surface of the ring gear 633, and gear-coupled with the planetary gear 632 on the inside of the ring gear 633, and a drive shaft. A sun gear 631 rotating together with 530 may be provided.

The tenang gear 631 may be coupled to the driving shaft 530 to rotate. The sun gear 631 may be provided as a separate member from the drive shaft 530, but is not limited thereto, and the sun gear 631 may be integrally formed with the drive shaft 530.

The sun gear 631, the planetary gear 632, and the ring gear 633 may be provided as helical gears. When each gear is provided as a helical gear, noise can be reduced and power transmission efficiency can be increased. However, it is not limited thereto, and the sun gear 631, the planetary gear 632, and the ring gear 633 may be provided as spur gears.

As the rotor rotates as an example of operation of the gearbox 630, when the drive shaft 530 and the sun gear 631 connected to the drive shaft 530 rotate, the planetary gear 632 is gear-coupled on the outer circumferential surface of the sun gear 631. ) may be geared and rotated between the ring gear 633 and the sun gear 631.

The planetary gear 632 may include a planetary gear shaft 6323 inserted into the center of rotation. The planetary gear shaft 6323 may rotatably support the planetary gear 632 .

The reducer may further include a first carrier 6342 and a second carrier 6343 supporting the planetary gear shaft 6323. The planetary gear shaft 6323 may be supported by the second carrier 6343 at the front and supported by the first carrier 6342 at the rear.

The drum rotation shaft 6341 may extend from the center of rotation of the second carrier 6343 in a direction away from the motor unit. The drum rotation shaft 6341 may be provided as a separate component from the second carrier 6343 and coupled to rotate together. On the other hand, the drum rotation shaft 6341 may extend from the second carrier 6343 and be integrally formed with the second carrier 6343.

The drum rotation shaft 6341 may be coupled to the drum to rotate the drum. As described above, the drum rotating shaft 6341 may be coupled to the drum through a connecting body such as a bushing, or may be directly coupled to the drum without a separate connecting body.

The drum rotation shaft 6341 may be supported by the first housing 610 . The first housing 610 extends in a direction away from the second housing 620 from the first housing blocking body 611 and the first housing blocking body 611 that shields the accommodation space of the second housing 620. A first housing bearing portion 612 accommodating the drum rotation shaft 6341 may be included. A first bearing 660 and a second bearing 670 are press-fitted to the inner circumferential surface of the first housing bearing part 612 to rotatably support the drum rotational shaft 6341 .

The first housing 610 and the second housing 620 may be coupled to each other through a speed reducer fastening member 681 . In addition, the speed reducer fastening member 681 can pass through the first housing 610 and the second housing 620 at the same time and couple the two members. In addition, the speed reducer fastening member 681 penetrates the first housing 610, the second housing 620 and the rear plate 420 at the same time to couple the first housing 610 and the second housing 620. At the same time, the reducer 600 may be fixed to the rear plate 420.

The rear plate 420 may be formed of a thin iron plate. Therefore, it may be difficult to secure rigidity to support all of the reducer 600, the motor unit 500 coupled to the reducer 600, and the drum 200 connected to the reducer 600. Therefore, when the reducer 600 is coupled to the rear plate 420, the bracket 700 may be used to secure the rigidity of the rear plate 420. The bracket 700 may be formed of a material having higher rigidity than the rear plate 420 and coupled to the front or rear surface of the rear plate 420 .

The bracket 700 is coupled to the front surface of the rear plate 420 to secure rigidity to which the reduction gear 600 can be coupled. and can be combined at the same time. A fastening member such as a bolt may be used to couple the rear plate 420, the bracket 700, and the reducer.

In addition, in order to fix the reducer 600 to the rear plate 420, the reducer fastening member 681 used to couple the first housing 610 and the second housing 620 can be used. . That is, the speed reducer fastening member 681 may pass through the second housing 620, the first housing, the rear plate 420, and the bracket 700 and couple them together. When combined in this way, since the rear plate 420 can be supported by the bracket 700 from the front and by the first housing 610 from the rear, rigidity can be secured even by the coupling of the reducer 600. . However, it is not limited to this, and first, only the first housing 610 and the second housing 620 are coupled using the speed reducer fastening member 681, and then the speed reducer 600 is connected to the rear plate 420 using a separate fastening member. ) can be combined.

In addition, a stator coupling portion 613 to which the motor unit 500 can be coupled may be formed on a radially outer side of the first housing 610 . The stator coupling portion 613 may include a coupling groove formed by recessing the stator coupling portion 613 .

The stator 510 may be directly coupled to the rear plate 420, but may also be coupled to the stator coupling part 613. The stator 510 may include a fixing rib 512 provided on an inner circumferential surface to support the stator. The fixing rib 512 may be coupled to the stator coupling part 613 . The fixing rib 512 and the stator coupling part 613 may be coupled to each other by a stator coupling pin 617 .

Since the motor unit 500 is coupled to the reduction gear 600 while being spaced apart from the rear plate 420, the motor unit 500 and the reduction gear 600 may form one vibrating body. Therefore, even when vibration is applied from the outside, the drive shaft 530 coupled to the rotor 520 and the drum rotation shaft 6341 connected to the reducer 600 can easily maintain coaxiality.

The drum rotating shaft 6341 may be distorted due to vibration of the drum 200 . However, since the motor unit 500 is coupled to the first housing 610 supporting the drum rotation shaft 6341, even if the axial direction of the drum rotation shaft 6341 is distorted, the first housing 610 The axial direction of the drive shaft 530 will also be twisted similarly. That is, since the motor unit 500 is moved integrally with the reduction gear 600, the drum rotation shaft 6341 and the drive shaft 530 can maintain coaxiality even when force is applied from the outside.

Due to the coupling structure as described above, the efficiency and reliability of transmitting the power generated in the motor unit 500 to the drum 200 increases, and the rotational shaft 6341 and the drive shaft 530 are rotated. There is an effect that can prevent wear of the gearbox 630, reduction in efficiency of power transmission, and reduction in durability and reliability.

Referring to FIG. 10 , the rear plate 420 may be located at the rear of the drum. The rear plate 420 may guide the hot air discharged from the circulation passage part 820 to the drum. That is, the rear plate 420 may be positioned behind the drum to form a flow path so that hot air is evenly supplied to the entire drum.

The rear plate 420 may include a rear panel 421 facing the rear surface of the drum and a duct part 423 provided to be recessed backward from the rear panel 421 to form a flow path. The duct part 423 may be provided by being pushed backward from the rear panel 421 . The duct part 423 may be provided to partially accommodate the rear surface of the drum.

The duct part 423 may include an inlet part 4233 positioned behind the circulation passage part and a moving part 4231 positioned behind the drum. The moving part 4231 may be provided to accommodate a part of the drum. The moving part 4231 may partially accommodate the drum and form a flow path provided behind the drum.

The moving part 4231 may be provided in an annular shape to face a suction hole formed on the rear surface of the drum. The moving part 4231 may be recessed in the rear panel 421 . That is, the front of the moving part 4231 is provided to be open, and may form a flow path together with the rear surface of the drum. can

When the front of the moving part 4231 is provided to be opened, hot air moved to the moving part 4231 can be directly moved to the drum without passing through a separate structure. Therefore, it is possible to prevent heat loss from occurring while the hot air passes through the separate configuration. That is, there is an effect of increasing drying efficiency by reducing heat loss of hot air.

The rear plate 420 may include a mounting part 425 provided inside the moving part 4231 in the radial direction. The mounting part 425 may provide a space to which the reduction gear 600 or the motor part 500 is coupled. That is, the rear plate 420 may include a mounting portion 425 provided on the inside and a floating portion 4231 provided in an annular shape outside the mounting portion 425 in a radial direction.

Specifically, the flow part 4231 may include an outer circumferential flow part 4231a that surrounds an inner space in which hot air flows from the outside. In addition, the flow part 4231 may include an inner flow part 4231b that surrounds an inner space through which hot air flows. That is, the outer circumferential flow portion 4231a may form an outer circumference of the floating portion 4231 and the inner circumferential flow portion 4231b may form an inner circumference of the floating portion 4231 .

In addition, the flow part 4231 may include a flow concave surface 4232 forming a rear surface of a passage through which hot air moves. The flow depression surface 4232 may be provided to connect the flow outer circumferential portion 4231a and the flow inner circumferential portion 4231b. That is, a space in which hot air discharged from the circulation passage part 820 flows may be formed by the flow inner circumferential portion 4231b, the flow outer circumferential portion 4231a, and the flow depression surface 4232 .

In addition, the hot air can be guided toward the drum by preventing the hot air from leaking to the rear by the flow concave surface 4232 . That is, the flow depression surface 4232 may mean a depression surface of the flow part 4231 .

The inlet part 4233 may be positioned to face the circulation passage part 820 . The inlet may be positioned to face the blower 8231. The inlet part 4233 may be recessed backward from the rear panel 421 to prevent interference with the blowing part 8231 . An upper side of the inlet part 4233 may be connected to the moving part 4231 .

The laundry treatment apparatus according to an embodiment of the present invention may include a connector 850 connected to the blower 8231. The connector 850 may guide hot air discharged from the blowing unit 8231 to the moving unit 4231. The connector 850 may have a flow path formed therein to guide the hot air discharged from the blowing unit 4231 to the moving unit 4231 . That is, the connector 850 may form a flow path connecting the blowing unit 8231 and the moving unit 4231 . The cross-sectional area of the passage provided inside the connector 850 may increase as the distance from the blowing unit 8231 increases.

The connector 850 may be positioned to face the inlet 4233. The inlet 4233 may be recessed backward to prevent interference with the connector 850 . Also, an upper end of the connector 850 may be provided to partition the moving part 4231 and the inlet part 4233. That is, the hot air discharged from the connector 850 may be introduced into the moving part 4231 and prevented from being introduced into the inlet part 4233 .

The connector 850 may be provided to evenly supply hot air to the moving part 4231 . The connector 850 may have a width that increases as the distance from the blowing unit 8231 increases. An upper end of the connector 850 may be located along a circumferential extension of the outer circumferential portion 4231a.

Accordingly, the hot air discharged from the connector 850 may be supplied to the moving part 4231 as a whole without being moved to the inlet part 4233 . The connector 850 prevents hot air from concentrating on one side of the moving part 4231 to evenly supply the hot air to the inside of the drum. Therefore, there is an effect of increasing drying efficiency of clothes.

The connector 850 may be provided so that the width increases toward the upstream side, so that the speed of the hot air moving along the connector 850 decreases along the flow direction. That is, the connector 850 may perform a function of a diffuser for adjusting the speed of hot air. The connector 850 reduces the speed of the hot air to prevent the hot air from being intensively supplied to a specific portion of the drum.

Due to the shape of the connector 850 described above, the inlet portion 4233 provided to face the connector 850 and prevented from interfering with the connector 850 also has a width as it moves away from the blowing portion 8231. may be provided to increase. Due to the shape of the inlet part 4233, the overall shape of the duct part 423 may be a '9' shape when viewed from the front.

Since the drum is provided to rotate during the drying cycle, the drum may be provided to be spaced apart from the moving part 4231 by a predetermined distance. Hot air may flow out through the separation space.

Accordingly, the laundry treatment apparatus may further include a sealing unit 450 to prevent hot air from leaking into the separation space between the drum and the flow unit 4231 . The sealing part 450 may be positioned along the circumference of the moving part 4231 .

The sealing part 450 may include a first sealing 451 provided along an outer circumference of the moving part 4231 . The first seal 451 may be provided between the outer circumference of the drum and the moving part 4231 . In addition, the first seal 451 is provided in contact with both the drum rear surface 220 and the rear plate 420 to more effectively prevent leakage.

Meanwhile, the first seal 451 may be provided in contact with the front surface of the connector 850 . In addition, the first seal 451 may be provided in contact with an upper end of the connector 850 . The connector 850 and the moving part 4231 may form a flow path through which hot air flows. Accordingly, the first seal 451 is provided to come into contact with the connector 850 to prevent hot air from leaking between the drum and the connector 850 .

The sealing part 450 may include a second sealing 452 provided along the inner circumference of the moving part 4231 . The second seal 452 may be provided between the inner circumference of the drum and the moving part 4231 . In addition, the second seal 452 may be provided to contact both the drum rear surface 220 and the rear plate 420 . The second seal 452 may prevent hot air moving along the flow part 4231 from leaking toward the mounting part 425 .

Since the drum 200 rotates during the operation of the laundry treatment apparatus, continuous friction is applied to the seal 450 by the rear surface 220 of the drum. Therefore, it is preferable that the sealing unit 450 is made of a material capable of sealing between the drum rear surface 220 and the moving unit 4231 without deteriorating its performance even with frictional force and frictional heat generated by rotation.

Referring to FIG. 11 , the reduction gear 600 may be supported by the rear plate 420 and the motor unit 500 may be coupled to the reduction gear 600 . That is, the rear plate 420 may be provided to support both the reduction gear 600 and the motor unit 500.

At the rear of the rear plate 420, a motor unit 500 that provides rotational power and a speed reducer 600 that reduces the power of the motor unit and transmits it to the drum may be positioned.

The reducer 600 may be installed on the rear plate 420 so as to be located inside the duct unit 423 . The reducer 600 may be located inside the moving part 4231 in the radial direction so as to prevent interference with the moving part 4231.

The gear unit inside the reducer 600 may be damaged by the heat of the hot air moving along the moving part 4231. Therefore, the moving part 4231 and the reducer 600 may be provided to be spaced apart from each other by a predetermined distance.

The reducer 600 may be coupled to pass through the rear plate 420 . Therefore, the reducer 600 may be connected to the drum located in front of the rear plate 420 .

The stator 510 may be coupled to the reducer 600. The stator 510 may be coupled to the reduction gear 600 and installed to be spaced apart from the rear plate 420 . At this time, the reducer 600 may be positioned between the drum and the motor unit to support the drum and the motor unit to be spaced apart from the rear plate 420 . That is, the reduction gear 600 may be the center of supporting the drum and the motor unit.

On the other hand, the stator 510 includes a main body 511 provided in a ring shape, a fixing rib 512 extending from an inner circumferential surface of the main body 511 and coupled to the stator coupling part 613 of the reducer, Teeth 514 extending from the outer circumferential surface along the circumference of the main body 511 to wind the coil, and a pole shoe 515 provided at the free end of the teeth 514 to prevent the coil from escaping. can

The rotor 520 may include a rotor body 521 provided in a cylindrical hollow shape. In addition, the rotor 520 may include an installation body 522 that is recessed forward from the rear surface of the rotor body 521 . In the rotor 520 , permanent magnets may be disposed along the inner circumferential surface of the rotor body 521 .

The rotor 520 may be coupled to the drive shaft 530 to transfer rotational power of the rotor 520 to the outside through the drive shaft 530 . The driving shaft 530 may be connected to the rotor 520 through a washer part 540 .

In addition, the motor unit 500 may include a washer unit 540 supporting the driving shaft 530 . The washer unit 540 may include a washer coupling body 541 coupled to the rotor. The washer coupling body 541 may be provided in a disk shape.

The washer unit 540 may include a receiving body 542 accommodated in the rotor. The receiving body 542 may be provided to protrude rearward from the washer coupling body 541 . can include The washer part 540 may include a shaft support hole 543 provided through the center of the receiving body 542 . The drive shaft 530 may be inserted into the shaft support hole 543 and supported by the washer unit 540 .

In addition, the washer unit 540 may include a washer coupling hole 5412 provided through the washer coupling body 541 . In addition, the installation body 522 may include a rotor coupling hole 526 provided at a position corresponding to the washer coupling hole 5412 . That is, the washer unit 540 and the rotor 520 may be coupled to each other by a coupling member that passes through the washer coupling hole 5412 and the rotor coupling hole 526 at the same time. That is, the washer unit 540 and the rotor 520 may be coupled to rotate together.

In addition, the washer unit 540 may include a washer coupling protrusion 5411 protruding rearward from the washer coupling body 541 . In addition, the installation body 522 may include a washer protrusion accommodating hole 525 provided to correspond to the washer coupling protrusion 5411 . The washer coupling protrusion 5411 may be inserted into the washer protrusion receiving hole 525 to support coupling between the washer unit 540 and the rotor 520 .

In addition, the rotor 520 may include a rotor installation hole 524 provided through the center of the installation body 522 . The rotor installation hole 524 may accommodate the receiving body 542 . Accordingly, the washer unit 540 can rotate together with the driving shaft 530 by the rotor 520 and can firmly support the coupling between the driving shaft 530 and the rotor 520 . Therefore, there is an effect of securing durability and reliability of the entire motor unit 500 .

The stator 510 is fixed to the reducer 600 and has a body body 511 provided in a ring shape and a fixed rib extending from the inner circumferential surface of the body body 511 and coupled to the stator fastening hole 615 of the reducer. 512, a tooth 514 extending from the outer circumferential surface along the circumference of the main body 511 and provided to wind the coil, and a pole shoe provided at the free end of the tooth 514 to prevent the coil from escaping 515 and a terminal (not shown) for controlling supply of current to the coil.

The stator 510 may pass through the main body 511 and include an accommodation space 513 provided inside the main body 511 . The fixing ribs 512 may be provided in a plurality by being spaced apart at a predetermined angle based on the receiving space 513 inside the main body 511, and a fixing member is installed inside the fixing rib 512. A hole 5121 is provided so that the fixing rib hole 5121 and the stator fastening hole 615 of the reducer can be coupled using a fixing member such as a pin.

When the stator 510 is directly coupled to the reduction gear 600, a part of the reduction gear 600 may be provided to be accommodated in the stator 510. In particular, when the reduction gear 600 is accommodated in the stator 510, the overall thickness of the drive unit including both the reduction gear unit and the motor unit is reduced to further expand the volume of the drum.

To this end, the reducer 600 may be provided with a smaller diameter than the diameter of the main body 511 . That is, the first housing 610 and the second housing 620 may have a largest diameter smaller than that of the main body 511 . Thus, at least a part of the reducer 600 may be accommodated and disposed in the main body 511 . However, the stator coupling part 613 may extend to overlap the fixing rib 512 in the housing of the reducer. Thus, the stator coupling part 613 is coupled to the fixing rib 512 and parts of the first housing and the second housing 620 may be located inside the main body 511 .

The stator 510 may be coupled to the reducer 600 . It is coupled to the stator coupling part 613 protruding outward from the housing of the reduction gear 600 so that at least a part of the reduction gear may be accommodated inside the main body 511 . Thus, the center of the main body 511 and the center of the drive shaft 530 and the reducer 600 can always be maintained coaxially.

Meanwhile, the rotor 520 may be arranged to accommodate the stator 510 while being spaced apart from the pole shoe 515 by a predetermined distance. Since the rotor 520 is fixed to the reducer 600 in which the driving shaft 530 is accommodated in the main body 511, the distance G1 between the rotor 520 and the stator 510 is always can be maintained

Therefore, the rotor 520 and the stator 510 are prevented from colliding or being temporarily twisted and rotated in the stator 510, so that noise or unnecessary vibration can be prevented from occurring.

Meanwhile, a virtual first diameter line K1 passing through the center of the reducer 600 and the center of the driving shaft 530 and a virtual second diameter line K2 passing through the center of the main body 511 Both the virtual third diameter line K3 passing through the center of the rotor 520 may be disposed at the center of rotation of the reducer 600.

Thus, since the speed reducer 600 itself becomes the center of rotation of the drive shaft 530 and the stator 510 is directly fixed to the speed reducer 600, the drive shaft 530 is based on the speed reducer 600. can be prevented from turning. As a result, the reliability of the reduction gear 600 can be guaranteed.

Referring to FIG. 14(a), the fibers L forming the clothing may have a certain thickness. For example, when the fiber (L) is in a dry state, the diameter of the fiber (L) may be provided as a first diameter (D1).

Since the fiber (L) is provided with a material capable of expanding or compressing its volume, a void (C) capable of containing air may be disposed therein.

When the clothes are immersed in water (W) while performing the washing cycle, the fibers (L) themselves may also contain water, but the water may be filled in the pores (C).

Referring to FIG. 14(b) , even when the clothing is taken out of the water w, the water may remain in the void C. In particular, since the fiber (L) itself serves as a capillary, even if the fiber (L) is disposed in the air, the water (W) may be filled in the void (C) as it is.

On the other hand, when the clothing is pulled out while being immersed in the water (W), it may be partially contracted due to the surface tension of the water. Therefore, when the fiber (L) is immersed in water (W) and taken out, the diameter of the fiber may be reduced to a second diameter (D2) smaller than the first diameter (D1).

Referring to FIG. 14(c), when the drying process is performed in a state in which the diameter of the fibers (L) is reduced, the water contained in the pores (C) is evaporated and an empty space is formed inside the pores (C). do.

The fibers (L) may generate contraction force and restoring force to fill the suddenly regenerated voids (C). As a result, the fiber (L) can be contracted inwardly.

Referring to FIG. 14(d), when an external force (F) acts on the fiber (L) by the rotation of the drum in a state where the void (C) is regenerated inside the fiber (L), the void (C) can be removed In other words, when the fiber (L) is applied to the contraction force to fill the void (C) or the fall impact (F) applied to the fiber (L), the void (C) can be removed.

Referring to FIG. 14(e), when the voids C are removed, the fiber L can be further contracted by that much, and the fiber L has a third diameter smaller than the second diameter D2. (D3).

As a result, in the process of drying the clothes with the laundry treatment apparatus of the present invention, the diameter of the fibers L of the clothes may be reduced from the first diameter D1 to the third diameter D3.

Referring to FIG. 15 (a), the length of a portion of the clothing in which the fibers L are combined may be provided as a first length (T1), and the thickness of the portion of the clothing may be provided as a first diameter (D1). there is.

Referring to FIG. 15 (b), when the voids (c) are removed and the fibers (l) are contracted, the length of the part of the clothing may be shortened to a second length (T2) shorter than the first length, The thickness of a portion of the clothing may also be reduced to a third diameter D2 smaller than the first diameter D1.

As a result, during the drying cycle, the entire garment may shrink in length and thickness compared to the state before drying.

Furthermore, as the clothes dry and become closer to a dry cloth state, the surface of the clothes may become fluffed even by a small amount of friction.

In addition, if the clothes are not dry and close to the wet state, and the clothes are heavier than the original weight, the frictional force further increases when the clothes rub against each other or the drum, and the surface of the clothes may be worn.

In order to prevent this, the laundry treatment apparatus of the present invention may perform a drying cycle to prevent not only shrinkage of the clothes but also abrasion of the clothes.

Figure 16 (a) shows the control step constituting the drying process.

The control panel of the laundry treatment apparatus of the present invention may execute an arbitrary drying course and option for performing a drying process for removing moisture from the clothes accommodated in the drum 200 .

The control panel is provided to receive a selection command for selecting any one of an arbitrary drying course and option and an execution command for executing the selected course and option through the input unit 118 .

An arbitrary drying course and option may be composed of an algorithm that performs a drying process by supplying hot air to the inside of the drum 200 while rotating the drum 200 by operating the drive unit and the heat exchange unit 900. .

For example, an arbitrary drying course and option commonly include an air supply step (S1) of supplying air to the drum 200, and rotating the drum 200 during the air supply step (S1) to dry the clothes. A rotation step (S2) of exposing the air, and a temperature control step (S3) of controlling the internal temperature of the drum 200 or the temperature of the refrigerant may be included.

The air supply step (S1), the rotation step (S2), and the temperature control step (S3) may be simultaneously performed during the drying process.

The air supplying step (S1) may include supplying hot air to the drum 200 by driving the heat exchanger 900 and the circulation passage fan 950. In addition, the air supply step (S1) may include supplying relatively low-temperature air to the inside of the drum 200 by driving only the circulation flow path fan 950 without driving the heat exchange unit 900.

Meanwhile, the rotation step (S2) and the temperature control step (S3) may be performed to protect clothes.

Specifically, the rotation step (S2) and the temperature control step (S3) may be performed to perform an arbitrary drying course and option for performing the drying cycle. In addition, the rotation step (s2) and the temperature control step (s3) may be performed to protect clothes, such as preventing damage to clothes and preventing shrinkage of clothes.

For example, when the optional drying course and option have functions of preventing damage to clothes and preventing shrinkage of clothes, the rotation step (s2) and the temperature control step (S3) for protecting clothes may be performed.

In addition, when there is a cloth protection course for protecting the clothes, the rotation step (s2) and the temperature control step (S3) for protecting the clothes may be performed when the cloth protection course is performed.

Hereinafter, the air supply step (S1), the rotation step (S2), and the temperature control step (S3) for protecting clothes will be described.

The air supply step (S1), the rotation step (S2), and the temperature control step (S3) may be performed when an arbitrary drying course and option are performed, and when there is a cloth protection course, the cloth protection course is performed. may be performed when

16(b) shows a control method of the air supply step (S1).

In addition, in the air supply step (S1), when the first heat exchanger 910 is washed with the water collected in the water collector 860, the circulation flow fan 950 stops and the pump 861 operates. It may also include doing As a result, the air supplying step (S1) may also include a section in which air is temporarily not supplied to the drum 200.

Meanwhile, since the driving unit is directly connected to the drum 200, the rotational speed and rotational direction of the drum 200 may be changed in the rotation step (S2). That is, when the air supply step (S1) is performed, the control panel may drive the motor unit 500 to rotate the drum 200 through the reduction gear 600. The motor unit 500 can change the rotational speed and rotational direction of the drum 200 according to an algorithm set in an arbitrary drying course and option.

In general, the air supply step (S1) includes the state of the heat exchange unit 900, the operating time of the heat exchange unit 900, the temperature of the air discharged to the circulation passage unit 820, the dryness of the clothes, the A preheating period (A1), a constant rate drying period (A2), a falling rate drying period (A3), and a cooling period according to at least one of the operation times of the motor unit 500 (cooling period) (A4).

Figure 16 (c) shows the control method of the rotation step (S2).

The rotation step (S2) includes a high-speed section (H) in which the drum 200 is rotated at a first speed in which the clothes rotate by adhering to the inner wall of the drum 200, and the clothes are moved along the drum 200. It may include a low-speed section (L) for rotating the drum 200 at a second speed lower than the first speed so that the drum 200 is separated from the inner wall of the drum 200 and stirred whenever it rotates.

The first speed may correspond to a speed at which the drum 200 rotates or higher to generate a centrifugal force of 1 G or more on the clothes, and the second speed may correspond to a speed at which the drum 200 rotates to generate a centrifugal force of 1 G or less on the clothes. It may correspond to the speed of rotating (200).

The rotation step (S2) may be performed in all of the preheating section (A1), the constant rate drying section (A2), the reduced rate drying section (A3), and the cooling section (A4).

In addition, the rotation step (S2) may be stopped for a certain time in at least one of the preheating section (A1), the constant rate drying section (A2), the reduced rate drying section (A3), and the cooling section (A4), but the air The supplying step (S1) may not be stopped in any one of the preheating section (A1), the constant rate drying section (A2), the reduced rate drying section (A3), and the cooling section (A4).

The rotation step (S2) is at least one of preventing damage to clothes, preventing shrinkage of clothes, and drying clothes in a preheating section (A1), a constant rate drying section (A2), a decreasing rate drying section (A3), and a cooling section (A4). For this, various combinations of the high-speed section (H) and the low-speed section (L) may be arranged.

Thus, in the rotating step (S2), friction or abrasion of the clothes can be prevented by allowing the clothes to adhere to the drum 200 through the high-speed section (H), and drying of the clothes through the low-speed section (L) may be performed, and when rotating at a speed lower than the second speed, the mechanical force applied to the clothing may be reduced to prevent shrinkage of the clothing.

In addition, the rotation step (S2) can be divided into a prevention section (S21), a protection section (S22), a separation section (S23), and an exposure section (S24) based on the function of protecting the fabric.

The preventing step (S21) may include a high-speed section (H) in which the drum is rotated at a first speed (H1) or higher at which the clothes are attached to the inner wall of the drum and rotated. That is, in the preventing step, friction between clothes or between clothes and the drum 200 can be prevented by attaching the clothes to the drum 200 and rotating them.

In addition, the prevention step (S21) may further include a low speed section (L) rotating lower than the first speed (H1). Thus, in the prevention step (S21), the high-speed section (H) and the low-speed section (L) may be arranged periodically. Thus, in the preventing step (S21), by stirring the clothes through the low-speed section (L), overdrying of only a specific area of the clothes in the high-speed section (H) can be prevented and the clothes can be induced to dry evenly. .

That is, in the prevention step (S21), the low speed section (L) of the clothes is included so that the clothes can be dried as well as the clothes are protected.

In the preventing step (S21), any one of a pulling motion and a knurling motion described later may be performed.

The prevention step (S21) may be performed in at least one of the preheating section (A1), the constant rate drying section (A2), and the reduced rate drying section (A3). Since the preheating section (A1), the constant rate drying section (A2), and the reduced rate drying section (A3) require not only drying but also protection of clothes, the prevention step (S21) is performed in the preheating section (A1), It may be performed at least once in each of the constant rate drying section A2 and the decreasing rate drying section A3.

The preheating period (A1) ends when the temperature of the refrigerant reaches a specific temperature (TC) from the starting temperature, and the constant rate drying period (A2) is when the dryness reaches the set value (c) or the constant rate drying period (A2). It can be distinguished that the duration of the drying section A2 ends when the reference time elapses, and the reduced rate drying section A3 ends when the dryness level reaches the completion value e.

Meanwhile, the prevention step (S21) performed in the preheating section (A1) is higher than the prevention step (S22) performed in the constant rate drying section (A2) or the reduced rate drying section (A3) compared to the low speed section (L). The ratio of the high-speed section H may be set longer. This is because in the preheating section A1, since the clothes are in a wet state and are relatively contracted, it is necessary to inflate the clothes as much as possible by arranging a large number of the high-speed sections H.

In addition, in the prevention step (S22) performed in the constant rate drying section (A2) or the reduced rate drying section (A3), the ratio of the low speed section (L) is higher than that in the preheating section (A1), so the drying efficiency of clothes is higher. can be further increased.

Meanwhile, in the rotating step (S2), the exposure step (S24) of exposing the clothes to the air may be performed by rotating the drum 200 faster than the limit speed and lower than the first speed H1.

The exposure step (S24) can be regarded as a step aimed at drying the clothes regardless of the protection of the clothes. For example, the exposing step (S24) can be regarded as a step in which the tumbling motion, the flipping motion, and the like are performed.

Meanwhile, the prevention step (S21) may be performed after the exposure step (S24) ends in the constant rate drying section (A2) or the reduced rate drying section (A3). In the exposure step (S24), the drying of the clothes progresses and the closer they are to the dry cloth, the more fluff is generated on the surface of the clothes or damaged by friction, so the prevention step (S21) is performed after the exposure step (S24). It is possible to minimize friction between clothes and clothes and between clothes and drums by performing.

The protection step (S22) can be seen as a step including a low-speed section (L) for rotating the drum at a second speed (L1) or less. Specifically, the protecting step (S22) may include a limiting section in which the clothes are rotated at a limiting speed (L3) that is blocked from rising above the height of the drum center (O).

That is, the protecting step (S22) may correspond to reducing a drop impact applied to the clothing and preventing friction between the drum and the clothing.

In the protection step (S22), the shrinkage of the clothes can be prevented by minimizing the fall impact of the clothes and maintaining the voids C in the inner fibers of the clothes. Also, in the protecting step (S22), the clothes may be dried by allowing the clothes to be stirred inside the drum 200 while preventing shrinkage of the clothes.

The protecting step (S22) may correspond to performing the rolling motion.

In addition, since the protection step (S22) is performed to maintain the air gap (C) of the clothes, it can be performed in the reduced rate drying section (A3) in which drying is significantly progressed.

On the other hand, the rotating step (S2) is a separation step (S23) of rotating the drum at the first speed (H1) or the second speed (L1), then rotating at a higher speed and then rotating at a lower speed, which is periodically repeated. may further include.

In the separating step (S23), wet cloth and dry cloth may be separated by using a difference in inertial force of clothes according to dryness. Therefore, when the separation step (S23) is performed in the constant rate drying section (A2), the wet cloth can be separated from the dry cloth and dried intensively, and the dry cloth can be prevented from being overdried.

The separation step (S23) may correspond to performing a shaking motion.

Since the drying rate drying section A3 is a state in which a significant portion of the clothes are dried, it is more important that the clothes are dried evenly. Therefore, the separation step (S23) is performed before entering the reduced rate drying period (A3) so that the clothes are separated according to the dryness level, thereby significantly reducing the duration of the reduced rate drying period (A3).

In the reduced rate drying section A3, the protection step S22 may be performed and then the prevention step S21 may be performed. When the dryness of the clothes increases in the protection step (S22), it is necessary to prevent friction between the clothes and the drum, and in the prevention step (S21), the clothes are stirred and the clothes are dried in the low speed section (L). This is because drying can be performed, and even in the high-speed section (H), drying can be performed even in areas of clothes that are not attached to the inner wall of the drum 200.

The prevention step (S21) may be performed when the dryness level reaches the specific value (d) in the reduced rate drying section (A3).

As a result, the laundry treatment apparatus of the present invention appropriately selects or combines the prevention step (S21), the protection step (S22), and the separation step (S23) for each section of the air supply step (S1), so that clothes are worn out. It can prevent shrinkage of clothes, prevent clothes from shrinking, and promote uniform drying of clothes.

For example, in the preheating section (A1), the pulling motion is performed to prevent contraction of the wet cloth, and in the constant rate drying section (A2), the clothes are dried by the tumbling motion, and the knurling motion is used to prevent the clothes from being abraded. and performs a shaking motion to be described later to evenly dry the clothes. In the reduced rate drying section (A3), a rolling motion to be described later is performed to prevent the clothes from shrinking while drying them, and the hanging motion is performed to generate fluff on the clothes. can prevent doing so.

According to the course and type of option, the rotation step (S2) is performed by appropriately selecting a pulling motion, a knurling motion, a tumbling motion, a flipping motion, a rolling motion, and a stop motion to be described later for each section of the air supplying step (S1). can do.

In addition, the laundry treatment apparatus of the present invention may apply all of the above motions when performing the rotation step (S2) in the air supply section (S1).

Alternatively, the clothes handling apparatus of the present invention may selectively perform only a specific motion among the drum motions in a specific section.

For example, the clothes handling apparatus of the present invention performs the pulling motion in the preheating section A1 when performing the rotating step S2 when a specific drying course and option are performed, and the constant rate drying section A2. In , the tumbling motion and the knurling motion or the shaking motion are performed, the rolling motion and the spreading motion are performed in the rate drying section (A3), and the stop motion is performed in the cooling section (A4). Only a few of the things to do can be selected and performed. That is, when performing the rotation step (S2), the laundry handling apparatus of the present invention may perform the pulling motion in the preheating section A1 and perform the tumbling motion in the remaining sections.

16(d) shows the control method of the temperature control step (S3).

The temperature control step (S3) is a step of controlling the driving of the compressor 930 to control the internal temperature of the drum 200 or the temperature of the hot air supplied to the drum 200. In the temperature control step (S3), the compressor 930 may be differently controlled in the preheating section A1, the constant rate drying section A2, the reduced rate drying section A3, and the cooling section A4. .

The temperature control step (S3) may be a step of controlling the internal temperature of the drum 200 so that it does not exceed a limit temperature (T_limit) at which clothes may be damaged. To this end, the temperature control step (S3) includes a first step (S31) of rotating the compressor 930 at a heating RPM (rpm_h) and rotating the compressor 930 at a constant rate RPM (rpm_cr) lower than the heating RPM. It may include a second step (S32) of rotating the compressor 930 at a damping rate RPM (rpm-fr) lower than the constant rate RPM (S33). (See Figure 17)

In other words, the temperature control step (S3) controls the temperature of the refrigerant by sequentially decelerating the drive RPM of the compressor 930 during the air supply step (S1) so that the temperature inside the drum 200 is limited. It can be controlled not to exceed the temperature (T_limit). Accordingly, it is possible to prevent the clothing from being overheated and damaged by the hot air.

The preheating section A1 may be divided based on the operating time or operating conditions of the compressor 930. Specifically, when the drying process starts, the compressor 930 may start driving to compress the refrigerant and discharge the refrigerant to the second heat exchanger 920 . At this time, a section from the starting temperature T0 to the temperature of the refrigerant discharged from the compressor 930 reaches a specific temperature TC may be set as the preheating section A1.

The specific temperature TC may correspond to the maximum temperature of the refrigerant that the compressor 930 can discharge during the drying process. For example, it may correspond to 90 degrees Celsius.

Alternatively, the specific temperature TC may correspond to a temperature at which the refrigerant discharged from the compressor 930 can heat the second heat exchanger 920 to a maximum temperature.

Alternatively, the preheating period A1 may be set until the operating HZ of the compressor 930 reaches either the heating HZ or the maximum HZ.

Alternatively, the preheating period A1 may be set until the initial time after the compressor 930 is operated.

Meanwhile, the preheating section A1 may be set to a temperature until the temperature of the air flowing through the circulation passage part 930 reaches the heating temperature. The heating temperature may correspond to 40 degrees Celsius as a temperature at which the clothing can be dried in a greater amount than the amount of natural drying. That is, a section may be determined as the preheating section A1 until the heat exchanger 900 operates and the air discharged to the circulation passage section 930 reaches the heating temperature.

As a result, the preheating section (A1) is an initial section of the drying cycle, and the compressor 930 starts operating to heat the second heat exchanger 920 to a specific temperature, so that the inside of the drum 200 or the It can be said that it is a section where the temperature of the air flowing through the circulation passage part 930 is heated and prepared until the moisture of the clothes can be sufficiently dried.

In the preheating section A1, air continuously heated may be introduced into the drum 200 due to the operation of the compressor 930 and the circulating flow path fan 950. As a result, while the internal temperature of the drum 200 gradually increases, moisture may be evaporated from the clothes.

In addition, since the rotating step S2 proceeds in the preheating section A1 and the clothes rotate in the drum 200, the air can be evenly exposed to the surface of the clothes. As a result, drying of the clothes may proceed in the preheating section A1 as well.

After the preheating section A1, the constant rate drying section A2 may start.

The preheating section A1 and the constant rate drying section A2 can be divided based on the dryness of the clothes.

Specifically, the laundry treatment apparatus of the present invention may include a dryness sensor capable of measuring the dryness of the clothes. The dryness sensor may be provided to be in contact with clothes inside the drum 200 . The dryness sensor may be provided by being mounted on the front plate 410 and may be disposed below the inner circumferential surface of the front gasket 413 .

The dryness sensor may include an electrode sensor capable of contacting the clothes and measuring a resistance value of the clothes to calculate the dryness of the clothes.

Of course, the dryness sensor may be provided in any form as long as it can measure the dryness of the clothes.

It may be set that when the dryness of the clothes reaches the reference value (a), the preheating section A1 ends and the constant rate drying section A2 enters. For example, the reference value (a) may correspond to 20%.

The constant rate drying section A2 may be a section in which hot air is sufficiently introduced into the drum 200 and moisture in the clothes is dried in earnest.

In the constant rate drying section A2, a large amount of moisture from the clothing is continuously evaporated, and vaporization heat can be absorbed from the hot air. Therefore, in the constant rate drying section A2, the internal temperature of the drum 200 may increase to a smaller extent than that in the preheating section A1, or may be maintained at a constant level.

In the constant rate drying section A2, the internal temperature of the drum 200 or the temperature discharged to the circulation passage part 930 can be maintained at a drying temperature level, and the drying temperature is the end of the preheating section A1. It may correspond to a specific temperature (TC), which is a temperature.

That is, in the constant rate drying section A2, even if hot air higher than the specific temperature TC is supplied to the inside of the drum 200, the temperature inside the drum 200 may remain below the specific temperature TC.

* The rotation step (S2) is also performed in the constant rate drying section (A2), and the position of the clothes disposed on the drum 200 is continuously varied, so that the clothes can be evenly exposed to the hot air. Accordingly, a greater amount of moisture may be vaporized from the clothing 200 than when the drum 200 is stopped.

The decreasing rate drying section A3 may be performed after the constant rate drying section A2.

In the process of performing the constant rate drying section A2, the evaporation amount of moisture from the clothes may gradually decrease. Accordingly, as the amount of vaporized moisture contained in the clothes decreases, the temperature of the hot air introduced into the drum 200 may not be sufficiently lowered. As a result, the temperature inside the drum 200 may rise higher than the drying temperature by the supplied hot air. Accordingly, the reduced rate drying period A3 may be set to be entered from the point at which the temperature inside the drum 200 rises above the drying temperature.

The decreasing rate drying section A3 may be set to be entered when the dryness level of the clothes reaches the set value c in the course of the constant rate drying section A2 . When the clothes come into contact with the dryness sensor provided as the electrode sensor and the calculated dryness level reaches the set value (c), it can be seen that the reduced rate drying section A3 enters.

The set value (c) may be set to 50% or more, for example, 80%. This is because when the dryness of the clothes is 50% or more, the heat of vaporization is also reduced because the amount of moisture discharged from the clothes is reduced, so the temperature of the hot air does not decrease.

The rotation step (S2) is also performed in the reduced rate drying section (A3), so that clothes that are not completely dried inside the drum 200 can be exposed to the hot air. Accordingly, the dried portion of the clothes is covered by the inner wall of the drum 200 or other clothes by the rotation of the drum 200, thereby preventing overdrying.

In addition, by rotating the drum 200, the part of the clothes that is not completely dried is exposed to the inside of the drum 200, so that it can be prevented from being dried.

The cooling section A4 may be performed after the reduced rate drying section A3. The cooling section A4 may correspond to a section where the drying of the clothes is completed, but the inside of the drum 200 is not yet cooled, and thus the user may be injured.

It may be set that the drying rate of clothes reaches the completion value (e) during the decreasing rate drying period (A3) to enter the cooling period (A4). For example, the completion value (e) may correspond to 90% or more.

In the cooling section A4 , the compressor 930 does not operate, and the motor unit 500 and the circulation passage fan 950 may drive. As a result, cold air having a temperature lower than that of the hot air is supplied to the drum 200 , and the cold air evenly contacts clothes rotating inside the drum 200 so that the clothes can be cooled.

The cooling period (A4) may end when the internal temperature of the drum 200 reaches a safe temperature. The safe temperature is a temperature at which the user is not exposed to fire, and may correspond to 20 degrees.

The rotation step (S2) is also performed in the cooling section (A4) so that all areas of the clothing can be exposed to cold air. Therefore, not only the clothes are cooled, but also the air inside the drum 200 can be mixed with the cold air and cooled due to the flow of the clothes.

Meanwhile, in the cooling section A4, a waiting step of waiting for a predetermined time after the rotation step S2 is finished may be further performed. That is, at the end of the cooling period (A4), only the circulation flow path fan 950 is driven without rotation of the drum 200 so that only cold air flows into the drum 200 or the circulation path fan 950 is not driven. Clothing may be left to cool naturally.

Meanwhile, the laundry treatment apparatus of the present invention may further perform a temperature control step (S3) while performing the air supply step (S1) and the rotation step (S2).

The temperature control step (S3) is a step of preventing the internal temperature of the drum 200 from rising above the limit temperature (Tmax), and the limit temperature is used to dry and sterilize clothes, but damage the clothes due to high heat. and a temperature at which deformation is prevented.

For example, the limit temperature Tmax may be set to 60 degrees Celsius or less.

The temperature control step (S3) may be performed in the entire section of the air supply step (S1).

In the temperature control step (S3), the driving rpm of the compressor 930 and the compressor 930 are controlled so that either the air discharged from the inside of the drum 200 or the air introduced does not exceed the limit temperature Tmax. It is possible to control the temperature of the refrigerant discharged from the

In the temperature control step (S3), the temperature of the refrigerant discharged from the compressor 930 may be controlled so as not to exceed a limit temperature set to decrease at a certain temperature over time from the maximum temperature Th of the refrigerant.

The limit temperature T_limit of the refrigerant is set to decrease during the entire period from the preheating period A1 to the cooling period A4. As a result, since the temperature of the refrigerant decreases in each section, the temperature of the drum 200 can be controlled so as not to exceed the limit temperature Tmax.

The limit temperature T_limit of the refrigerant may vary with time and may decrease as time elapses.

In the temperature control step (S3), the compressor 930 can be controlled so that the temperature of the refrigerant discharged does not exceed the limit temperature set at each moment.

In the temperature control step (S3), the limit temperature (T_limit) of the constant rate drying section is lower than the limit temperature (T_limit) of the constant rate drying section, and the limit temperature (T_limit) of the constant rate drying section is the limit of the decreasing rate drying section. It can be set lower than the temperature (T_limit).

In the temperature control step (S3), the compressor 930 may control the temperature of the drum by controlling the temperature of the refrigerant by controlling the RPM.

Specifically, when the preheating section A1 proceeds, the first step S31 may be performed. The compressor 930 may be accelerated and driven up to the heating RPM (rpm_H), and the heating RPM may correspond to a maximum RPM that can be reached by the compressor 930 during the drying process. Accordingly, the temperature of the refrigerant may be rapidly increased in the preheating section A1.

When the preheating section A1 ends or the constant rate drying section A2 is entered, the second step S32 is performed. As a result, the rpm at which the compressor 930 is driven can be controlled to be reduced. In the constant rate drying section A2, the compressor 930 may be controlled to be driven at a constant rate rpm (rpm_CR) lower than the heating rpm.

Accordingly, it is possible to prevent the temperature of the drum 200 from rising in the constant rate drying section A2.

In the reduced rate drying section A3, the third step S33 may be performed. The compressor 930 may be controlled to be driven at a damping rate rpm (rpm_FR) lower than the constant rate rpm.

Thereafter, in the cooling section A4 , the compressor 930 may stop driving and the temperature of the drum 200 may decrease.

As a result, since the compressor 930 is driven in the temperature control step (S3), the temperature of the refrigerant rises and the temperature of the drum can rise or be maintained.

In addition, since the rpm of the compressor 930 is lowered for each section in the temperature control step (S3), the temperature of the drum 200 may not exceed the limit temperature (Tmax).

Also, in the temperature control step (S3), since the compressor 930 continues to operate without stopping even if the driving rpm decreases, the refrigerant is compressed to heat the air flowing into the drum 200. there is. Thus, the temperature of the drum 200 can be maintained without falling below a predetermined temperature below the limit temperature Tmax.

As a result, the laundry treatment apparatus of the present invention can prevent damage to clothes through not only the rotation step (S2) but also the temperature control step (S3).

The rotating step (S2) may include a tumbling motion of rotating the drum 200 in one direction at a second speed (L1) that is lower than the first speed (H1) capable of providing an acceleration force of 1G or more.

For example, when the drum 200 has a diameter of 24 inches or 27 inches, the first speed H1 may correspond to 50 RPM or more, and the second speed L1 may correspond to 50 RPM or less. may be related to speed.

The first speed H1 may be defined as a speed at which clothes accommodated in the drum 200 adhere to the inner wall of the drum and rotate when the drum 200 rotates. In the tumbling motion in which the drum 200 rotates at the second speed L1 lower than the first speed H1, the clothes accommodated in the drum 200 are separated from the inner wall of the drum 200 and rotated. As a result, clothes accommodated in the drum 200 may be separated from and dropped from the inner wall of the drum 200 whenever the drum 200 rotates, and exposed to the hot air evenly.

The tumbling motion may rotate in either a clockwise direction or a counterclockwise direction as long as the drum 200 rotates at the second speed L1. However, the tumbling motion maintains the rotational direction of the drum 200 without changing, so that the load applied to the motor unit 500 can be reduced, and the clothes can be prevented from being suddenly twisted or bundled together.

Fig. 19 shows the state of clothes in the tumbling motion.

Referring to FIG. 19(a) , clothes accommodated inside the drum 200 may be placed under the drum 200 due to its own weight.

Referring to FIG. 19(b), when a tumbling motion is performed and the drum 200 is rotated clockwise, the clothes accommodated inside the drum 200 have a frictional force with the drum 200, and the drum 200 ) may adhere to the inner wall of the drum 200 and rise upward due to the centrifugal force generated while rotating at the second speed L1.

The clothes may rise up attached to the inner wall of the drum 200 up to the center of rotation O of the drum 200 or higher than the center.

Referring to FIG. 19(c), since the drum 200 rotates at the second speed L1 providing a centrifugal force lower than 1 G, the clothes can move upwards more than the center of the drum 200, It may be separated from the inner wall of the drum 200 at a position lower than the highest point of the drum 200 and fall toward the lower part of the drum 200 .

That is, in the tumbling motion, the clothing accommodated in the drum 200 may rise above the radius R of the drum 200 from the bottom of the drum 200 attached to the inner wall of the drum 200, but , It cannot rise as much as the diameter (2R) of the drum 200 from the bottom of the drum 200 and can be separated from the inner wall of the drum 200.

In other words, since the load of the clothes in the tumbling motion is greater than the centrifugal force provided by the drum 200, the drum 200 ) is separated from the inner wall and falls toward the bottom of the drum 200.

In addition, when the clothes are separated from the inner wall of the drum 200 due to the inertial force rotating together with the drum 200, they may fall on one side from the lowest point of the drum 200. For example, when the drum 200 rotates clockwise, the clothes may fall toward the right from the lowest point of the drum 200, and when the drum 200 rotates counterclockwise, the clothes fall down. It may fall toward the left from the bottom of the drum 200 .

As a result, the clothes can move as close as possible to the diameter 2R of the drum 200 while falling from the upper part of one side higher than the center O of the drum to the lower part of the other side lower than the center O of the drum. The area or time the clothes are exposed to the hot air supplied to the drum 200 may be longer.

In addition, as the clothing is repeatedly attached to and separated from the inner wall of the drum 200, the exposed surface facing the center (O) of the drum 200 is changed so that the entire surface of the clothing can be evenly exposed to hot air. there is.

As a result, clothes can be most effectively dried in the tumbling motion. However, as described above, when only the tumbling motion is continued, shrinkage or abrasion of clothing may occur.

In order to prevent this, the clothes handling apparatus of the present invention further provides an additional drum motion in addition to the tumbling motion to prevent wear and shrinkage of the clothes. In addition, in the laundry treatment apparatus of the present invention, the drum motion applied in each section may be varied or various combinations may be applied.

In other words, in the laundry treatment apparatus of the present invention, the rotation step (S2) is the rotation speed of the drum 200, the rotation direction of the drum 200, and the rotational speed of the drum 200 in each section of the air supply step (S1). The duration of the can be variously varied. That is, in the rotation step (S2) of the laundry treatment apparatus of the present invention, various motions are performed to expand the contracted clothing, reduce external forces such as mechanical force and frictional force applied to the clothing, or minimize friction between the clothing and the drum. can do.

In the laundry treatment apparatus of the present invention, since the motor unit 500 is directly coupled to the drum 200 or directly coupled to the drum 200 through the speed reducer 600, the motor unit 500 is connected to the drum 200. The rotation direction and rotation speed of (200) can be freely changed.

Therefore, in the laundry handling apparatus of the present invention, the rotational speed of the drum 200, the rotational direction of the drum 200, the drum 200 according to the state of the clothes and the internal state of the drum 200 in the air supply step (S1). By varying at least one of the rotational speed holding times of (200), it is possible to prevent all shrinkage, abrasion, and damage of clothes.

Hereinafter, various motions that the laundry treatment apparatus according to the present invention can perform in the rotation step (S2) will be described.

The rotation step (S2) includes a high-speed section (H) for rotating the drum so that the clothes are rotated in a state attached to the inner wall of the drum, and rotating the drum so that the clothes fall and rotate on the inner wall of the drum. It may be composed of a low speed section (L).

The high-speed section (H) is a section in which the drum 200 rotates at a first speed (H1) or higher generating an acceleration force of 1G or more, and the low-speed section (L) is a section in which the drum 200 rotates at a first speed (H1). ) corresponds to a section in which an acceleration force of 1G or less is generated by rotating at a second speed L1 lower than the second speed L1.

For example, in the laundry treatment apparatus of the present invention, the second speed L1 may be set to 50 RPM or less, and the first speed H1 may correspond to a speed exceeding 50 RPM.

20 shows that the rotating step includes a pulling motion.

In the rotation step (S2), the drum 200 is rotated at the second speed (L1) for the preparation time, and then the drum 200 is rotated at the first speed (H1) for the expansion time. motion can be performed.

As a result, the clothes can be separated from the inner wall of the drum 200 and stirred inside the drum 200 during the preparation time, and can be attached to the inner wall of the drum 200 during the expansion time to receive an acceleration force of 1G or more. there is.

The expansion time may be set longer than the preparation time. Accordingly, the clothing may receive an acceleration force of 1G or more for longer than the stirring time.

Since the clothing adheres to the inner wall of the drum 200 due to the acceleration force of 1 G or more during the expansion time, it can be inflated along the inner circumferential surface of the drum 200 . In addition, since the clothes are separated from the inner wall of the drum 200 during the preparation time after the expansion time, other areas of the clothes may stick to the inner wall of the drum 200 at the next expansion time.

The pulling motion may repeat that the clothing is pulled during the inflation time, the area to be pulled during the preparation time is changed, and then pulled again during the inflation time. As a result, in the pulling motion, the contracted clothing may be expanded or the clothing may be pulled in advance to prevent contraction.

On the other hand, the pulling motion may be added to rotate during the waiting time at the third speed (L2). Rotation during the waiting time at the third speed L2 in the pulling motion may be arranged between acceleration from the second speed L1 to the first speed H1. Accordingly, after the drum 200 rotates at the second speed L1 and is decelerated at the third speed L2, it can be accelerated to the first speed H1. As a result, the acceleration force applied to the clothes by the drum 200 is increased so that the clothes can be further expanded.

In addition, rotating during the waiting time at the third speed (L2) in the pulling motion may be arranged after being decelerated from the first speed (H1) to the second speed (L1). Accordingly, the drum 200 may be rotated at the first speed H1, then decelerated to the second speed L1, and then decelerated to the third speed L2. As a result, the time during which the rotational speed of the drum 200 is decelerated from the first speed H1 to the third speed L2 is increased, so that a drop impact applied to the clothes may be reduced. In addition, the load applied to the motor unit 500 to brake the drum 200 can be reduced.

Meanwhile, the standby time may be set to be smaller than the expansion time. As a result, in the pulling motion, more time for pulling clothes can be secured.

In addition, the waiting time may be set smaller than the preparation time. As a result, in the pulling motion, it is possible to minimize the time during which the clothes are stirred so that the clothes wear each other or rub against the drum 200 .

Meanwhile, the expansion time may be set equal to the sum of the preparation time and the waiting time or greater than the sum of the preparation time and the waiting time. Accordingly, the time during which the clothes are pulled in the pulling motion may be equal to or longer than the time during which the clothes are stirred.

As a result, in the pulling motion, the high-speed section H and the low-speed section L may be arranged periodically.

In addition, the low-speed section (L) can be further divided into two-step speed section. Therefore, in the pulling motion, a total of three or more speed sections may be periodically repeated.

In the pulling motion, the drum 200 rotates at the first speed H1 for the expansion time, then decelerates at the second speed L1 and rotates for the preparation time, and then decelerates at the third speed L2 to stand by. After being rotated for a period of time, it is accelerated again to the first speed H1 and rotated during the expansion time may be periodically repeated.

As a result, the pulling motion may pass through 1G or more acceleration sections twice during one period.

Referring to FIG. 21(a), the clothes inside the drum 200 may be disposed in an initial length D1 state.

Referring to FIG. 21(b), the drum 200 rotates at the second speed L1 during the preparation time or at the third speed L2 during the waiting time, and the clothes are It can be stirred in the drum 200 without being attached to the inner wall of the rise.

Referring to FIG. 21(c), the drum 200 may be accelerated and rotated up to a first speed H1. Therefore, the drum 200 maintains the first speed H1 during the expansion time, and the expansion time may be set longer than the time the drum rotates once. Therefore, the clothes can rotate by adhering to the inner wall of the drum 200 and can expand along the inner wall of the drum 200 .

Referring to FIG. 21(d), the clothing may be expanded by an expansion length D2 longer than the initial length D1. In addition, as the above process is repeated, the clothing may not be contracted by continuously receiving an expansion force, and may be expanded again even if it is contracted.

Fig. 22 shows that the rotating step includes a flipping motion.

The rotation step (S2) may include a flipping motion of rotating the drum 200 in both directions at a second speed (L1) lower than the first speed (H1) capable of providing an acceleration force of 1G or more.

The flipping motion may perform a tumbling motion in one direction for a predetermined period of time and then perform a tumbling motion in another direction for a predetermined period of time.

The predetermined time may correspond to a time when the drum rotates once. In this case, the flipping motion corresponds to one rotation of the drum 200 clockwise at the second speed L1 and one rotation of the drum 200 counterclockwise at the second speed L1. can In this case, the drum 200 may generate an effect of turning the clothes inside out while agitating the clothes in one direction and then in the other direction.

As a result, the surface of the clothing exposed to the inside of the drum 200 is changed, preventing overdrying of a specific area of the clothing and inducing uniform drying.

The flipping motion may be intermittently performed at a specific point in time when the tumbling motion is performed. Also, when the flipping motion is performed, the rotational direction of the tumbling motion may be changed.

As a result, as the surface of the clothes in contact with the drum 200 changes in the tumbling motion, undried areas of the clothes may be intensively dried in the subsequent tumbling motion.

On the other hand, the predetermined period of time may correspond to a time during which the drum rotates N times. For example, the predetermined time may be set to 2 minutes or longer. In this case, the flipping motion may correspond to performing the tumbling motion by periodically changing its direction.

As a result, if only a specific part of the clothes is in contact with the inner wall of the drum 200 or exposed to the inside of the drum 200 while the drum rotates in one direction, the clothes turn over or are stirred while the drum rotates in the other direction, so that the clothes Other parts of the may be in contact with the inner wall of the drum 200 or exposed to the inside of the drum 200 .

As a result, clothes inside the drum 200 can be evenly exposed to hot air.

Of course, the flipping motion may also include rotating the drum 200 in one direction at the first speed H1 for a predetermined time and then rotating in the other direction at the first speed H1 for a predetermined time. In this case, it is possible to concentrate the area where the hot air is supplied to the clothes by changing the area of the clothes attached to the inner wall of the drum 200 .

Also, the flipping motion may include rotating the drum 200 in one direction at the first speed H1 for a predetermined time and then rotating in the other direction at the second speed L1 for a predetermined time.

Referring to FIG. 23(a), the drum 200 may rotate clockwise. At this time, when the drum 200 rotates at the second speed L1, the clothing may rise to a height higher than the center o of the drum and then fall down, like a tumbling motion.

Referring to FIG. 23(b), the clockwise rotation of the drum 200 may be decelerated to momentarily stop or start counterclockwise rotation. Clothes accommodated in the drum 200 may be distributed under the central (o) area of the drum.

Referring to FIG. 23(c), the drum 200 may be accelerated and rotated in a counterclockwise direction. At this time, when the drum 200 rotates at the second speed L1, an effect of performing the tumbling motion in the opposite direction can be obtained. The clothes may fall down after rising to a region higher than the center O of the drum. At this time, since the rotation direction is opposite to that of the clockwise rotation, the clothes may be attached to the inner wall of the drum 200 and rise at a different part from that of the clockwise rotation. As a result, the clothes may be stirred inside the drum 200 while at least partially turned inside out.

As a result, when the drum 200 rotates clockwise, other areas are more exposed to the hot air, so that the clothes can be dried evenly.

The flipping motion may periodically repeat the motions of FIGS. 21 (A) to (C). Also, unlike shown, in the flipping motion, the drum 200 may rotate at a first speed H1.

Fig. 24 shows that the rotating step includes a knurling motion.

The rotating step (S2) includes a knurling motion in which a high-speed section (H) in which the clothes are rotated while attached to the inner wall of the drum and a low-speed section (L) in which the clothes are rotated while falling from the inner wall of the drum are periodically performed. can include

The knurling motion rotates the drum 200 at a first speed H1 for a first time and then rotates the drum 200 at a second speed L1 lower than the first speed H1 for a second time. It may be a motion that periodically repeats the command. That is, in the knurling motion, the drum 200 may rotate periodically in a high-speed section (H) and a low-speed section (L).

In the Nulgi Motion, the drum 200 rotates to generate an acceleration force of 1 G or more for a first time, the drum 200 rotates to generate an acceleration force of 1 G or less for a second time, and again for a first time. This corresponds to repeating the motion of rotating the drum 200 to generate an acceleration force of 1G or more.

The knurling motion may correspond to rotating the drum 200 at a first speed H1 for a first time and then repeating the tumbling motion for a second time.

When the knurling motion is performed, the clothing rotates attached to the drum 200 for the first time, is separated from the drum 200 for the second time, stirred or dropped, and rotates attached again for the first time. can

As a result, the time the clothes are attached to the inner wall of the drum 200 is set longer than even in the tumbling motion, and friction on the inner wall of the drum 200 can be minimized. In addition, when the clothes are attached to the inner wall of the drum 200 and rotated, the clothes are fixed to the drum 200, so that the clothes can be prevented from rubbing against each other or being worn.

In order to prevent the clothes from being damaged, the knurling motion may set the first time period longer than the second time period or at least equal to the second time period.

That is, the knurling motion secures enough time for the clothes to rotate while adhering to the inner wall of the drum 200, thereby preventing the clothes from being rubbed unnecessarily.

As a result, the duration of the high-speed section H in the Nulgi Motion may be set equal to or longer than the duration of the low-speed section L, and the total time of the high-speed section H is equal to or longer than the duration of the duration. It can be set longer than the total time.

The knurling motion rotates the drum 200 at a first speed H1 for a first time while intensively supplying hot air to a region of the clothing 200 that does not contact the inner wall of the drum 200. In addition, while rotating the drum 200 at the second speed L1 for a second time, the clothes 200 are separated from the drum and stirred, and for the next first time, another area of the clothes 200 is moved to the drum ( 200), it is possible to change the area where the hot air is concentrated by not contacting the inner wall.

As a result, in the knurling motion, overdrying of a specific area of clothing can be prevented.

On the other hand, in the knurling motion, in order to sufficiently secure the clothes on the inner wall of the drum 200 and sufficiently stir the clothes inside the drum 200, in the high-speed section (H), the drum It rotates at least one rotation or more, and in the low speed section (L), the drum may rotate at least one rotation or more.

In other words, the first time may be set to a time longer than the drum 200 rotates once, and the second time may be set to a time longer than the drum 200 rotated once. For example, the first time period may be set to 2 minutes or more, and the second time period may also be set to 2 minutes or more.

The knurling motion may further arrange a preparation section rotating at a third speed L2 lower than the second speed L1 for a third time between the high speed section H and the low speed section L. The knurling motion may further decelerate the drum 200 up to the third speed L2 when decelerating the drum 200 from the first speed H1 to the second speed L1.

Attached to the inner wall of the drum 200, it is possible to prevent an additional strong external force from being additionally applied to clothes subjected to an acceleration force of 1G or more. In addition, when the motor unit 500 is decelerated by redundant braking, etc., it is decelerated to the third speed (L2) to ensure a longer deceleration time of the drum 200, thereby maximizing the acceleration force or external force applied to the clothing can reduce Therefore, it is possible to prevent friction or fluff from being generated in the process of separating clothes from the drum 200 .

On the other hand, the third time period is set to be longer than the time period for the drum to rotate once, so that time for clothing to be properly distributed before being stirred while rising from the drum 200 can be secured. However, since the third time period is set shorter than the second time period, unnecessary drying delay may be prevented.

The third speed L2 may be a speed at which the clothes are prevented from rising above the central area O of the drum.

As a result, the Nulgi Motion rotates for a third time after the drum 200 rotates at a first speed H1 for a first time and then decelerates to a third speed L2 lower than the second speed L1. After that, it may include accelerating to the second speed (L1) and rotating for the second time, and repeating this process.

In the knurling motion, the rotating direction of the drum may be maintained without being changed. Accordingly, it is possible to prevent an excessive load from occurring on the motor unit 500 or excessive agitation and rubbing of clothes.

Meanwhile, the first time of the knurling motion may be set longer than the expansion time of the pulling motion. Also, the second time period may be set longer than a preparation time for the pulling motion. This is because the knurling motion does not prevent the clothing from expanding, but rather induces the clothing to be sufficiently exposed to hot air while preventing frictional force from being applied to the clothing.

That is, the ratio of the high-speed section H in the knurling motion may be smaller than the ratio of the high-speed section H in the pulling motion.

In addition, the time or period at which the next high-speed section (H) arrives after the high-speed section (H) has passed in the knurling motion is the time or period at which the next high-speed section (H) arrives after the high-speed section (H) has passed in the pulling motion. It can be set longer than the period.

Meanwhile, both the pulling motion and the knurling motion may be common in that the high-speed section H and the low-speed section L are periodically performed.

However, in the pulling motion, the high-speed section (H) is set to be longer than the low-speed section (L), and the high-speed section (H) of the knurling motion is set to be longer than the high-speed section (H) of the pulling motion. can

This is because the pulling motion is a motion focusing on expanding the clothes, and the hanging motion is a motion focusing more on drying and stirring the clothes.

Therefore, the low-speed section (L) of the knurling motion may be set longer than the high-speed section (H) of the pulling motion.

Referring to FIG. 25 (a), the drum 200 may rotate clockwise at a second speed L1 for a second time. At this time, the clothes may be repeatedly stirred while repeatedly rising and falling to a height corresponding to the central region (O) of the drum or to a place higher than the central region (O) of the drum. A section rotating at the second speed L1 for a second time may correspond to a tumbling motion.

Referring to FIG. 25(b), the drum 200 may rotate clockwise at a first speed H1 for a first time. The clothes may adhere to the inner wall of the drum 200 and rotate for the first time.

At this time, the drum 200 may be slowly accelerated from the second speed L1 to the first speed H1. For example, the transition time from the low-speed section (L) to the high-speed section (H) in the nullgi motion may be set to about 1 minute. Accordingly, it is possible to prevent damage to the clothes by preventing excessive physical force from being applied to the clothes.

In this process, the clothes may be intensively dried by being exposed to hot air in areas that do not stick to the inner wall of the drum 200 . In addition, since the clothing sticks to the inner wall of the drum 200 and continuously rotates, the effect of being fixed to the drum 200 can be derived. Therefore, since the clothes and the drum 200 do not move relative to each other, friction between the clothes and the drum 200 can be prevented.

In addition, since the entire clothes adhere to the inner wall of the drum 200 and rotate, the clothes do not rub against each other, and a part and the rest of the clothes do not rub against each other. As a result, friction between the clothes is also prevented, and the generation of fluff on the clothes can be prevented.

Referring to FIG. 25(c), the drum 200 may be reduced to the first speed H1 and rotated again. At this time, the drum 200 may be decelerated to the third speed (L2) and rotated. As a result, the clothes can be surely separated from the inner wall of the drum 200 and continuously stirred while the drum 200 rotates. As the clothes are stirred, the area contacted with the inner wall of the drum 200 is exposed to the inside of the drum 200 and dried.

Meanwhile, the deceleration time from the first speed H1 to the third speed L2 may be set to about 1 minute.

The drum 200 may be accelerated again to the second speed L1 and rotated again for a second time. The clothing may be continuously exposed to hot air while rising and falling from the central region (o) of the drum 200 and may be repeatedly stirred. Accordingly, the clothes can be dried with higher efficiency than when the drum rotates at the first speed H1.

Referring to FIG. 25(d), the drum 200 may be accelerated to a first speed H1 and rotated for a first time.

The knurling motion may dry clothes by intermittently performing the tumbling motion by repeating the above process. In addition, the knurling motion can attach the clothes to the inner wall of the drum 200 in the middle of the tumbling motion to significantly reduce the time the clothes rub against the drum while being stirred.

As a result, the knurling motion can promote both drying and protection of clothes.

The knurling motion may be performed in the constant rate drying section A2. If the knurling motion is performed in the constant rate drying step (A2) when the dryness of the clothes approaches the target value b entering the decreasing rate drying section, friction or abrasion of the clothes can be prevented.

Also, the knurling motion may be performed in the rate reduction drying section A3. In the reduced rate drying section A3, since the dryness of clothes exceeds the target value b, fluff or abrasion may easily occur on the clothes. Therefore, the knurling motion may be performed to protect the clothes in the reduced rate drying section.

At this time, it is preferable that the knurling motion is performed at the end of the falling rate drying section. Since the knurling motion is a motion in which the section for fixing the clothes to the inner wall of the drum 200 is set long, drying of the clothes may not be guaranteed if it is performed at the beginning of the thermal drying section, and the end of the rate reduction drying section is the most This is because the clothes are in a dry state, so there is a great need to protect them from wear and tear.

Accordingly, the knurling motion may be performed when the dryness of the clothes reaches a specific value d in the decreasing rate drying section, and may be performed until the decreasing rate drying section ends.

Fig. 26 shows that the rotating step includes a rocking motion.

The rotation step (s2) may include a rocking motion of periodically varying the rotational speed of the drum in two or more regions.

The shaking motion may include periodically rotating the drum at a first speed H1 at which the clothes adhere to the inner wall of the drum and rotate at a second speed L1 that is slower than the first speed H1. .

The shaking motion may cause the clothes to be separated from each other according to the weight by providing a difference in acceleration to the clothes due to a difference in rotational speed of the drum.

On the other hand, the shaking motion includes a first speed (H1) at which the clothes are attached to the inner wall of the drum and rotated, a second speed (L1) slower than the first speed (H1), and a second speed (L1) slower than the second speed (L1). It may include periodically varying the rotational speed of the drum 200 with at least two of the third speeds L2.

For example, in the shaking motion, the speed of the drum 200 is sequentially changed to the second speed L1, the first speed H1, and the third speed L2. can include

In addition, the shaking motion may include repeatedly performing the speed of the drum 200 at the second speed L1, the first speed H1, and the third speed L2. can

That is, the rocking motion rotates the drum 200 at the second speed L1, accelerates the drum 200 to the first speed H1, and then moves the drum 200 to the third speed L2. It may include repeating deceleration to .

When the drum 200 accelerates in the rocking motion, it accelerates from the third speed L2 to the second speed L1, and then accelerates from the second speed L1 to the first speed H1. can Accordingly, it is possible to prevent the drum 200 from rapidly accelerating, thereby preventing an excessive load from being generated on the motor unit 500 and preventing clothes from being pressed against the inner wall of the drum 200 .

In addition, when the drum 200 decelerates in the shaking motion, it decelerates from the first speed H1 to the third speed L2 at once to maximize the difference in inertial force on the clothes attached to the inner wall of the drum 200. can Accordingly, in the shaking motion, when the drum 200 decelerates, a large change in acceleration occurs, so that the clothes may be separated from each other due to a difference in inertial force.

In the shaking motion, clothes are separated from the drum 200, and the separated clothes are evenly distributed again, attached to the drum 200, and rotated repeatedly.

As a result, the shaking motion is a motion that repeats the process of accelerating from the low-speed section (L) to the high-speed section (H) and decelerating from the high-speed section (L) to the low-speed section (L), and the high-speed section (H) When decelerating from the low speed section (L), it can decelerate more than before acceleration.

On the other hand, since the purpose of the shaking motion is to form a difference in inertial force on the clothes by changing the acceleration inside the drum 200, the shorter the period of changing the speed is advantageous.

However, if the speed is set to be periodically changed during one rotation of the drum, sufficient time for separating the clothes may not be secured, and an excessive load may occur on the motor unit 500 .

Therefore, the time for changing the speed of the drum in the rocking motion can be set to be longer than the time for the drum to rotate once and shorter than 1 minute. For example, the period may be set between 10 seconds and 20 seconds.

In the shaking motion, all speed cycles of the drum 200 may be completed within one minute.

In the shaking motion, a difference in inertial force acting on the clothes is generated by changing an acceleration force applied to the clothes through a change in rotational force of the drum 200 . Among the clothes, heavy clothes have high inertia and respond sensitively to changes in the rotational speed of the drum 200, and light clothes have low inertia and respond insensitively to changes in the rotational speed of the drum 200. Therefore, heavy clothes and light clothes can be separated from each other according to the change in rotational speed of the drum 200 due to the difference in inertial force.

As a result, heavy clothing rises and falls inside the drum as the drum 200 rotates, and is often exposed to hot air, and light clothing has a small drop impact compared to the rotation of the drum 200, Since the amount of change in position is small, the friction between the clothes is small and the friction with the drum is small, so damage to the fabric can be prevented.

Therefore, the shaking motion has an advantage in that the drying process can be performed by separating the clothes according to the difference in load of the clothes.

On the other hand, if the clothes are close to a wet state due to low dryness or contain moisture, they will weigh more, so these clothes will respond sensitively to the change in the rotational speed of the drum 200. In addition, if clothes have a high degree of dryness and are close to a dry cloth state or have a low moisture content, they weigh less, and thus, such clothes will react insensitively to changes in the rotational speed of the drum 200.

Therefore, the shaking motion has an effect of separating clothes that have been dried a lot and clothes that have been dried less from each other according to the difference in drying degree of the clothes.

Since clothes containing a relatively large amount of moisture react sensitively to changes in the rotation of the drum 200, they are frequently exposed to hot air passing through the drum 200 while continuously rising and falling at a high level inside the drum 200. will be. Accordingly, clothes having a low dryness level or needing more drying may be dried more in the shaking motion.

Since clothes containing relatively little moisture react insensitively to changes in the rotation of the drum 200, the area exposed to the hot air is small because the rise is small inside the drum 200. Therefore, clothes with a high dryness or needless drying may have a low drying rate in the shaking motion.

In the shaking motion, even if the rotational speed of the drum 200 is varied in several sections, the duration of each section may be the same.

As a result, in the shaking motion, even if the air supplying step (S1) is further performed until clothes requiring further drying are dried, overdrying of sufficiently dried clothes can be prevented.

Meanwhile, the nullgi motion may be performed after the tumbling motion, and the shaking motion may be performed after the nullgi motion. This is to classify clothes dried through the tumbling motion and the knurling motion.

Also, the shaking motion may be performed before the rolling motion. Since the rolling motion is a motion of drying clothes while agitating them at a low speed, the effect of the rolling motion is maximized only when the rolling motion is performed after separating the clothes that require further drying from the clothes that have been sufficiently dried.

On the other hand, since the shaking motion includes a high-speed section (H), it is preferable to be performed in the constant rate drying section where clothes still contain moisture. Of course, it may also be performed to classify clothes that have been dried in the reduced rate drying section and clothes that require further drying.

Referring to FIG. 27(a), a total of three types of clothes may be accommodated inside the drum 200.

Even if a total of three types of clothes are exposed to hot air at the same time, the degree of drying may be different depending on the material of the clothes or the arrangement inside the drum 200.

For example, clothes No. 1 may be in a wet state containing a lot of moisture because drying is not sufficiently performed. Clothing No. 2 may be in a dry state with little moisture due to sufficient drying. Clothing No. 3 may be in a partially dried state.

Referring to FIG. 27(b), when the drum rotates at the second speed L1, all clothes inside the drum 200 rise along the drum 200 like a tumbling motion, and the drum 200 ) and may be exposed to hot air as it falls below the high point.

In this process, clothes No. 1, No. 2, and No. 3 can be stirred inside the drum 200 while forming a similar trajectory. Rotation at the second speed L1 may take about 10 seconds or 20 seconds.

Referring to FIG. 27(c), the drum 200 may be accelerated to the first speed H1 or to an excessive speed. In this case, since clothes No. 1 are heavy, they adhere to the inner wall of the drum 200 and rotate together with the drum 200 . At this time, since the clothing number 3 is lighter in weight than the clothing number 1, it may change less sensitively to the speed change of the drum 200 than the clothing number 1. Therefore, although it is disposed close to the inner wall of the drum 200, the force attached to the inner wall of the drum 200 may be weaker than that of No. 1.

On the other hand, since clothes No. 2 are lighter in weight than Nos. 1 and 3, they respond less sensitively to the speed change of the drum 200. Therefore, rather than sticking directly to the inner wall of the drum 200, it may fall similarly to the trajectory rotated at the second speed L1.

As a result, according to the change in the rotational speed of the drum, a change occurs in the trajectories of the first, second, and third clothes, so that the first, second, and third clothes may be separated.

Thereafter, clothing number 1 may repeatedly ascend and descend in the drum 200 according to the rotational speed of the drum 200, clothing number 3 may have a smaller height than clothing number 1, and Clothing may have a smaller rising height than No. 3 clothing. Accordingly, clothing No. 3 may be exposed to hot air more than clothing No. 2, and clothing No. 1 may be exposed to hot air more than clothing No. 3.

In addition, the No. 3 garment may rub less against the drum 200 than the No. 1 garment, and the No. 2 garment may rub less against the drum 200 than the No. 3 garment.

*Thus, like the clothes of No. 3, fluff may be generated even with a small friction as the clothes are closer to the dry state, but fluffing can be prevented due to the shaking motion.

In addition, like the clothing No. 1, when the clothing is in a wet state, fluff does not occur even if it is relatively rubbed, so it is okay even if a significant drop shock occurs, and rather, it can be more exposed to hot air while moving with a large drop. .

Fig. 28 shows that the rotating step includes a rolling motion.

The rotating step (S2) may include a rolling motion of rotating the drum so that the clothes fall or roll lower than the center (O) of the drum.

The rolling motion is a motion of rotating the drum 200 at a speed lower than the second speed L1 at which the tumbling motion is generally performed.

Thus, in the rolling motion 200, the moving range or trajectory of the clothes inside the drum 200 is minimized, and the mechanical force applied to the clothes is also minimized, so that the clothes can be prevented from being damaged or worn.

Also, in the rolling motion 200, clothes are repeatedly rolled and the entire area is evenly exposed to the inside of the drum 200, so that drying can be effectively performed.

On the other hand, since the rolling motion 200 is to minimize the physical force applied to clothes, the rolling motion can maintain the rotational speed of the drum 200 at a constant speed without changing the rotational direction of the drum 200.

Since the drop impact applied to the clothes is the weakest, the rolling motion may be mainly performed in the reduced rate drying section A3.

In the rolling motion 200 , as the drum 200 rotates, the clothes may rise due to frictional force with the inner wall of the drum 200 . However, the clothes cannot rise higher than the radius R of the drum at the bottom of the drum 200 and can be separated from the inner wall of the drum 200 and rolled toward the bottom of the drum 200 .

In the rolling motion 200, the drum may rotate at a protection speed L4 lower than the second speed L1.

The protection speed L4 may be set to a speed at which the clothes are prevented from moving above the center of the drum.

Accordingly, the clothing continuously moves from the bottom of the drum 200 to only one side and the rolling process is repeated, so that the drop impact is small and shrinkage of the clothing can be prevented.

On the other hand, in the rolling motion 200, since clothes are stirred only in an area lower than the upper middle area O of the drum 200, they can frequently come into contact with the dryness sensor. Therefore, through the rolling motion 200, the change in dryness of clothes can be detected more accurately.

The time during which the rolling motion is performed may be set longer than the time during which the shaking motion is performed. This is because the shaking motion is a motion of sorting clothes, and the rolling motion is a motion of drying clothes.

Also, it is preferable that the rolling motion is performed later than the shaking motion. This is because the clothes requiring drying through the shaking motion must be separated from the clothes on which drying has been performed so that they can be more evenly exposed to the hot air in the rolling motion.

It may be appropriate that the shaking motion is performed in the constant rate drying section A2 and the rolling motion is performed in the decreasing rate drying section A3.

Fig. 30 shows that the rotating step includes a stop motion.

Referring to FIG. 30 (a), the rotating step (S2) may include a stop motion of intermittently rotating the drum 200.

The stop motion may repeatedly perform rotation of the drum 200 and stop of the drum, and when the drum 200 rotates, the rotation direction of the drum 200 may be changed. In the stop motion, when the drum 200 rotates once in one direction, it may rotate in another direction after waiting for a stop time.

In the stop motion, a time during which the drum 200 is stopped may be set longer than a time during which the drum 200 rotates. For example, in the stop motion, the stopping time of the drum may be set to be three times or more than the rotating time of the drum.

Therefore, energy consumption can be minimized in the stop motion. In addition, in the stop motion, the clothes are not continuously pressed by their own weight, and wrinkles can be prevented from being changed due to a change in position.

Referring to FIG. 30(b), in the stop motion, the drum may be positioned in a stationary state.

Thereafter, while the drum 200 intermittently rotates clockwise or counterclockwise, the position of the clothes may be changed, the clothes may be stirred, or the clothes may be turned over.

The rotating speed of the drum 200 in the stop motion may be set as the protection speed L4.

Hereinafter, a section in which various motions of the rotation step (S2) can be optimally performed will be described.

As described above, in the laundry treatment apparatus of the present invention, since the driving unit is directly coupled to the drum 200 to rotate the drum 200, the rotation direction, rotation time, and rotation speed of the drum 200 can be freely adjusted. can be changed

Therefore, the rotation step (S2) of the laundry treatment apparatus of the present invention does not rotate the drum 200 in one direction at a constant speed, but adjusts the rotational speed and It can perform several motions that change the direction of rotation.

In the laundry handling apparatus of the present invention, various motions may be applied to each section of the air supply step in order to protect clothes in all drying courses and options. In addition, various motions can be applied to each section of the air supply step in the protection course that protects the cloth.

Specifically, in the laundry handling apparatus of the present invention, the rotating step (S2) includes a high-speed section (H) in which the drum is rotated so that the clothes are rotated in a state attached to the inner wall of the drum 200, and the clothes are rotated on the inner wall of the drum 200. It may be composed of a low-speed section (L) for rotating the drum so as to fall and rotate, and the ratio of the high-speed section (H) to the low-speed section (L) for each specific section during the progress of the air supply step (S1) is mutually As it is set differently, it is possible to perform the drying cycle while protecting the fabric and preventing the shrinkage of the clothes at the same time.

The preheating section A1 is a state in which clothes in a wet state are accommodated in the drum 200, and corresponds to a section in which a drying cycle starts. Accordingly, the clothes located in the preheating section A1 may be in a state contracted by water. That is, the fibers of the clothing may be in a contracted state from the first diameter D1 to the second diameter D2.

If the drying process is performed during this process, even if the voids C do not collapse, the clothes may be dried in a contracted state in the form of fibers having a second diameter D2.

To prevent this, the rotation step S2 in the preheating section A1 may perform a pulling motion. As a result, the clothes are expanded in the preheating section A1 so that the fibers of the clothes can come back closer to the first diameter D1.

On the other hand, the clothes in the wet state may be clumped together while going through the spin-drying process. At this time, since the pulling motion is performed repeatedly at the first speed H1 and the second speed L1, the clothes are pulled while being stirred, so that clumping of the clothes can be eliminated.

The pulling motion may be performed during the preheating period A1. In the preheating section (A1), since the refrigerant of the compressor is not heated to a specific temperature (TC) or the drive RPM of the compressor is not raised to the maximum RPM or a specific RPM, the speed of the drum increases through the pulling motion. Even if it is periodically and quickly changed, the energy consumed by the laundry treatment device may not exceed a limit range.

In the preheating section A1, since air is introduced while being heated, the clothes may be dried during the pulling motion.

Meanwhile, the pulling motion and the nulgi motion may be performed together. Also, the nullgi motion may be performed after the pulling motion. Accordingly, partial agitation and positional change of the clothing along with expansion of the clothing during the pulling motion can be ensured more reliably.

As a result, since the pulling motion or the knurling motion is disposed in the preheating section A1, the high speed section H and the low speed section L may be repeatedly arranged in the rotation step S2. The summing time of the high-speed section (H) may be set longer than the summing time of the low-speed section (L). In addition, the duration of the high-speed section (H) may be set longer than the duration of the low-speed section (L).

If the rotation at the second speed L1 in the low speed section L in the pulling motion is defined as a constant speed section and the rotation at the third speed L2 is classified as a deceleration section, in the preheating section A1 It can be seen that the high-speed section H, the constant-speed section, and the deceleration section are arranged periodically.

In the pull motion, since the waiting time is set shorter than the preparation time, it can be seen that the duration of the deceleration section is set shorter than that of the constant speed section.

In the preheating section (A1), since the high speed section (H) is longer than the low speed section (L), it can be regarded as a section that focuses more on the expansion of the clothes rather than the stirring of the clothes.

When the temperature of the refrigerant discharged from the compressor reaches a specific temperature TC or the driving RPM of the compressor reaches a specific RPM, the preheating section A1 ends and the constant rate drying section A2 begins.

The pulling motion may end when the preheating section A1 ends and the constant rate drying section A2 is entered.

The constant rate drying section A2 is a section in which the maximum amount of hot air flows into the drum 200, and corresponds to a section in which clothes are dried in earnest. Therefore, it is preferable that the clothes inside the drum 200 be exposed to hot air as much as possible.

Therefore, in the constant rate drying section A2, the tumbling motion may be performed first. Therefore, as the tumbling motion is performed after the end of the pulling motion, the clothing rises above the center O of the drum in an inflated state and moves from the drum 200 at a lower point than the highest point of the drum 0. While falling apart, it can be exposed to the hot air for as long as possible.

In addition, as the clothing repeatedly falls and rises, clumping is eliminated and the range of attachment to the inner wall of the drum 200 is changed, so that the entire clothing can be evenly exposed to hot air.

Meanwhile, when the tumbling motion progresses for a predetermined time, the clothes accommodated in the drum 200 can be divided into clothes that have been sufficiently dried by hot air and clothes that require further drying.

In this state, when only the tumbling motion is repeatedly performed, the air gap (C) collapses due to the drop impact of the sufficiently dried clothes, and the fiber can be contracted to the third diameter (D3), and the surface is the drum ( 200) may rub against the inner wall or other clothing and be damaged.

In order to prevent this, it is preferable to perform the shaking motion in the rotation step (S2). Through the shaking motion, clothes that have been sufficiently dried and clothes that require more drying may be separated.

As a result, the clothes that require further drying may be separated from the clothes that have been sufficiently dried, and may be intensively exposed to the hot air while moving along with the motion of the drum 200 .

In addition, clothes that have been sufficiently dried do not fall along with the clothes that need to be dried, so they may not be subjected to a drop impact together. In addition, the evaporation of moisture reduces the load and does not respond sensitively to the motion of the drum 200, preventing overdrying and preventing friction or abrasion.

The tumbling motion may correspond to a motion of intensively drying the clothes, and the shaking motion may correspond to a motion of separating and additionally drying a part of the clothes that requires more drying.

Accordingly, the duration of the shaking motion may be shorter than the duration of the tumbling motion. Since the shaking motion is for separating sufficiently dried clothes, it may be performed at the end of the constant rate drying section A2.

The shaking motion may be performed when the dryness of the clothes reaches the target value b. That is, it can be performed from when the dryness of the clothes reaches the target value (b) in the constant rate drying section (A2) until the end of the constant rate drying section (A2) and entering the decreasing rate drying section (A3). .

In the constant rate drying section A2, the shaking motion may be performed after the tumbling motion is performed. Also, the duration of the shaking motion may be set shorter than the duration of the tumbling motion.

This is because the shaking motion is a motion for sorting dried clothes, and the tumbling motion is a motion for drying clothes.

Meanwhile, the nullgi motion may be further performed between the tumbling motion and the shaking motion.

Therefore, when the knurling motion is performed, the high-speed section (H) can achieve the effect of performing the tumbling motion, and the low-speed section (L) allows the clothes to adhere to the inner wall of the drum 200, causing the drum 200 to move. , it is possible to prevent the clothes from rubbing against the drum 200 or from rubbing against each other.

That is, the knurling motion may be performed to prevent damage or friction of the clothes when the drying of the clothes has progressed to a certain extent as a result of the tumbling motion. The knurling motion may be regarded as putting a rest period in which stirring of clothes is stopped during the tumbling motion.

The knurling motion may be performed when the reference time elapses in the constant rate drying section A2. That is, when the reference time elapses while the tumbling motion is being performed, the nullgi motion may be performed.

The reference time may be set to a time when the dryness level of the clothes corresponds to the reference value (a), and may be set to a time when 20 minutes have elapsed after entering the constant rate drying section.

The knurling motion may be performed for a certain period of time when the dryness of the clothes reaches a reference value (a) lower than the target value (b) in the constant rate drying section (A2).

The target value (b) of the dryness level may correspond to 80% or more, and for example, the reference value (a) may correspond to 70%.

Also, the nullgi motion may be performed after the tumbling motion is completed, but may be performed intermittently during the tumbling motion.

Also, the nullgi motion may be performed after the tumbling motion ends and before the shaking motion is performed.

Meanwhile, since the knurling motion also protects the clothes and dries the entire clothes, it may be performed before the shaking motion. The duration of the nulgi motion may be shorter than the duration of the tumbling motion and longer than the duration of the shaking motion.

As a result, in the constant rate drying section A2, the last one can always end with the shaking motion, and the tumbling motion and the nullgi motion can be performed before.

Of course, the shaking motion may be performed before the nullgi motion. That is, it is effective to intensively dry a specific area of the clothes while preventing abrasion of the clothes through the knurling motion in a state in which the clothes are all sorted due to the shaking motion.

Of course, the duration of the shaking motion may be set longer than the duration of the nulgi motion. Although the shaking motion is also a section in which clothes are sorted, since it includes both the high-speed section (H) and the low-speed section (L), the clothes may be exposed to hot air while being sorted.

Therefore, since the shaking motion can intensively dry clothes requiring drying while sorting the clothes, it may be performed longer than the duration of the knurling motion or the tumbling motion.

As a result, since the tumbling motion is performed in the constant rate drying section A2, even if the knurling motion and the shaking motion are performed, the low-speed section L can be set longer than the high-speed section H. there is.

That is, the constant rate drying section (A2), unlike the heat drying section (A1), is arranged and distributed more low-speed section (L) can be seen as a section in which the stirring of clothes and exposure to hot air form the center.

Meanwhile, since the shaking motion is disposed in the constant rate drying section A2, the rotating step S2 can be considered to further include a variable section in which the rotational speed of the drum is varied in the constant rate drying section A2. , it can be seen that the variable period is performed until the clothing enters the falling rate period.

If the shaking motion is performed when the dryness level reaches the target value (b), it can be considered that the variable section starts when the dryness level reaches the reference value (a) after entering the constant rate drying section.

In addition, when the shaking motion is controlled by time rather than dryness, it can be seen that the variable section starts when the reference time elapses after entering the constant rate drying section.

Since the shaking motion includes a section rotating at an excessive speed faster than a section rotating at the first speed H1 or higher, the variable section includes a section in which the drum rotates faster than the high speed section H and a section in which the drum rotates at a slower speed than the high speed section H. It can be seen that all segments are included. In addition, in the variable section, it can be seen that the fast section, the high-speed section (H), and the slow section are periodically arranged.

On the other hand, when the shaking motion is performed after the tumbling motion, it can be seen that the low-speed section L is arranged until the start of the variable section. Since the tumbling motion is performed longer than the shaking motion, it can be seen that the duration of the low-speed section (L) in the constant rate drying section (A2) is set longer than the duration of the variable section.

In addition, when a knurling motion is additionally disposed between the tumble motion and the shaking motion, the rotation step (S2) includes the high-speed section H and the low-speed section between the low-speed section L and the variable section. It can be seen that the interval (L) is periodically arranged repeatedly.

When the constant rate drying section A2 ends, the decreasing rate drying section A3 may be performed. In the decreasing rate drying section A3, a significant amount of moisture is removed from clothes in the constant rate drying section A2, and heat of vaporization becomes insufficient, so that the temperature inside the drum 200 or the air discharged to the circulation passage part 930 is reduced. It can be seen as the period where the temperature starts to rise.

That is, when the temperature inside the drum 200 or the temperature of the air discharged through the circulation passage 930 reaches the reference temperature TR during the constant rate drying period A2, the decreasing rate drying period A3 begins. can be seen as starting

In addition, the fact that the temperature inside the drum 200 rises means that the drying of the clothes has sufficiently progressed. Accordingly, when the dryness level of the clothes enters the set value c higher than the target value b, it can be regarded that the reduced rate drying period A3 starts.

The set value (c) may correspond to 80 percent.

The reduced rate drying section A3 is a section in which most of the clothes are sufficiently dried, but some clothes or some areas of the clothes are not completely dried.

Therefore, when the rotation step (S2) in the reduced rate drying section (A3) increases the high-speed section (H) like the tumbling motion, a strong drop impact occurs on the dried clothes, and the air gap (C) collapses, resulting in shrinkage. It can be.

To prevent this, upon entering the reduced rate drying section A3, the rotating step S2 may perform a rolling motion.

In the rolling motion, since the width in which clothes rise and fall inside the drum 200 is much smaller than that of the tumbling motion, a fall impact on clothes can be minimized.

In addition, in the rolling motion, since the clothes move along the rotational direction of the drum and are continuously dropped and stirred at a position lower than the radius R of the drum, the surface of the clothes can be evenly exposed to the hot air.

Therefore, while parts of the clothes that need more drying are dried through the rolling motion, the part that has been sufficiently dried can be prevented from shrinking by minimizing the impact of falling.

The rolling motion may be performed for a set time period, and may be performed until a knurling motion described later is performed.

When the reduced rate drying period A3 progresses, the clothes are further dried, and the area requiring further drying may become very small. Even if the rolling motion is performed under this circumstance, a drop impact is generated on the dried clothes, and friction between the drum 200 and the clothes may occur, resulting in fluff or wear.

Therefore, a knurling motion may be further performed in the rate reduction drying section A3. In the knurling motion performed in the reduced rate drying section A3, the high speed section H may be set to be much longer than the low speed section L.

Accordingly, in the knurling motion, the clothes 200 are fixed to the inner wall of the drum 200 and fall from the drum 200 or rub against the drum 200 and the clothes can be prevented.

In addition, even in the knurling motion, the portion exposed to the inside of the drum 200 may be continuously dried. Therefore, in the knurling motion, clothes can be protected while drying is performed.

The knurling motion may be performed when the dryness of the clothes reaches a specific value (d) that is slightly smaller than the complete value (e) and higher than the set value (c).

Specifically, the knurling motion may be performed after the rolling motion. That is, when the rolling motion is finished, the knurling motion may be performed.

In addition, the execution time of the rolling motion may be set longer than the execution time of the knurling motion. This is because the rolling motion has a higher drying efficiency than the knurling motion, and the knurling motion may have an effect of protecting cloth when the clothes are dried over a specific value (d).

In the rate-of-rate drying section A3, a rolling motion may be performed at the beginning and a knurling motion may be performed at the end. As a result, the rotational speed of the drum can be set faster in the later part of the reduced rate drying section A3 than in the initial part. That is, at the end of the reduced rate drying period, the drum may rotate so that the clothes adhere to the inner wall of the drum and rotate one or more revolutions due to the knurling motion.

In addition, it can be seen that the falling rate drying section is set so that the drum rotates more slowly in the initial section than in the end section.

Also, in the reduced rate drying section, the drum may initially rotate so that the clothes may be separated from the inner wall of the drum or rolled by the rolling motion.

On the other hand, since the constant rate drying section A2 ends with the shaking motion and the decreasing rate drying section A3 starts with the rolling motion, it can be seen that the rolling motion is performed after the shaking motion.

On the other hand, when the speed reduction drying section A3 is viewed from the perspective of the speed of the rotation step S2, since the rolling motion is performed longer than the knurling motion, the duration of the low speed section L is shorter than the high speed section H It can be seen that it is set longer than the duration of

When the rolling motion is performed in the reduced rate drying section A3, it can be seen that the low speed section L of the rotation step S2 is set so that the clothes fall below the height of the center of the drum.

When the rolling motion and the knurling motion are performed in the reduced rate drying section A3, when the low speed section L ends in the rotation step S2, the high speed section continues until the reduction drying section A2 is completed. It can be seen that (H) is arranged, or the high-speed section (H) and the low-speed section (L) are periodically and repeatedly arranged.

In the knurling motion, based on the speed of the rotation step (S2), the duration of the high-speed section (H) from the start of the high-speed section (H) to the completion of the reduced rate drying section (A2) is the low-speed section. It can be seen that it is set equal to or longer than the duration of (L).

Since the knurling motion is performed when the dryness level reaches a specific value (d), the point at which the high-speed section (H) starts in the rotation step (S2) is a specific value at which the dryness level is higher than the set value (c). It can be seen that it is set to the point at which (d) is reached.

When the dryness of the clothes in the reduced rate drying section reaches a completion value (e) higher than the set value (c), the cooling section (A4) may be entered. The finished value (e) may be set to a dryness of 90% or more.

In the cooling section A4, drying of clothes is completed, but the internal temperature of the drum 200 is higher than that of the outside air, so it can be regarded as a section in which the user may be exposed to fire when the door is opened.

Therefore, in the cooling section A4 , the heat exchanger 900 is not driven, and only the circulation blowing fan 950 is driven so that the clothes can be cooled.

In the cooling section A4, since the clothes are almost completely dried, it is preferable not to rotate the drum 200 as much as possible. This is because in the cooling section A4, if the drum 200 and the clothes rub against each other even a little, the clothes may be damaged.

Even so, when only air is introduced into the drum 200 in the cooling section A4, the clothes disposed at the bottom of the drum 200 are pressed by the load, and wrinkles may occur in various parts of the clothes.

Therefore, the stop motion may be performed in the cooling section A4. That is, while the drum 200 rotates intermittently through the stop motion, it is possible to prevent wrinkles from occurring on the clothes.

* As a result, in the laundry treatment apparatus of the present invention, the rotating step (S2) performed in the air supply section (S1) selectively performs one of a plurality of drum motions according to time, thereby preventing damage and shrinkage of clothes, Drying of clothes can be completed.

The present invention is not limited to the scope of its rights to the above-described embodiment that will be able to be practiced in various forms. Therefore, if the modified embodiment includes the elements of the claims of the present invention, it should be regarded as belonging to the scope of the present invention.

Claims

A drum accommodating clothes, a drive unit rotating the drum, a circulation passage providing a space in which air in the drum is circulated or moisture contained in the air is condensed, and heat exchange heating the air flowing through the circulation passage In the control method of a laundry treatment apparatus comprising a unit,

an air supply step of supplying the heated air to the drum through the heat exchanger;

And a rotation step of rotating the drum during the air supply step,

The rotation step is

A method of controlling a laundry treatment apparatus comprising a shaking motion for periodically varying the rotational speed of the drum in two or more areas.
According to claim 1,

The shaking motion is

The rotational speed of the drum is periodically varied at least two of a first speed at which the clothes rotate while adhering to the inner wall of the drum, a second speed slower than the first speed, and a third speed slower than the second speed. A control method of a laundry treatment apparatus, characterized in that for doing.
According to claim 2,

The shaking motion is

The control method of the laundry treatment apparatus, characterized in that by sequentially varying the speed of the drum to the second speed, the first speed, and the third speed.
According to claim 3,

The control method of the laundry treatment apparatus, characterized in that the time for changing the speed of the drum in the shaking motion is set to be longer than a time for the drum to rotate once and shorter than 1 minute.
According to claim 3,

In the shaking motion, the second speed, the first speed, and the third speed are all varied within one minute.
According to claim 1,

The rotation step is

A tumbling motion of rotating the drum such that the clothes are separated from the inner wall of the drum or fall below the highest point of the drum,

The shaking motion is a control method of a laundry treatment apparatus, characterized in that performed after the tumbling motion.
According to claim 6,

The rotation step is

Further comprising a knurling motion in which a high-speed section in which the clothes are rotated while attached to the inner wall of the drum and a low-speed section in which the clothes are rotated while falling from the inner wall of the drum are periodically performed,

The nullgi motion is performed after the tumbling motion;

The control method of the laundry treatment apparatus, characterized in that the shaking motion is performed after the knurling motion.
According to claim 1,

The rotation step is

And a rolling motion for rotating the drum so that the clothes fall at a point lower than the center of the drum,

The control method of the laundry treatment apparatus, characterized in that the shaking motion is performed before the rolling motion.
According to claim 1,

In the air supply step, a preheating period and a constant rate drying period ( It is divided into a constant rate period), and a falling rate period,

The constant rate drying section is entered when the temperature of the refrigerant in the heat exchange unit reaches a reference value in the preheating section or when the heat exchange unit operates for a reference time,

The control method of the laundry treatment apparatus, characterized in that the shaking motion is performed in the constant rate drying section.
According to claim 9,

The shaking motion is performed when the dryness of the clothes reaches a target value in the constant rate drying section.
According to claim 10,

The falling rate drying section is entered when the discharge temperature of the circulation passage rises above the reference temperature or the dryness of the clothes reaches a set value;

The control method of the laundry treatment apparatus, characterized in that the shaking motion is performed before entering the reduced rate drying section.
According to claim 9,

The rotation step is

Further comprising a tumbling motion for rotating the drum so that the clothes are separated from the inner wall of the drum or fall below the highest point of the drum,

The control method of the laundry treatment apparatus, characterized in that the shaking motion is performed after the tumbling motion in the constant rate drying section.
According to claim 12,

The control method of the laundry treatment apparatus, characterized in that the duration of the shaking motion is set shorter than the duration of the tumbling motion.
According to claim 9,

The rotation step is

Further comprising a knurling motion in which a high-speed section in which the clothes are rotated while attached to the inner wall of the drum and a low-speed section in which the clothes are rotated while falling from the inner wall of the drum are periodically performed,

The control method of the laundry treatment apparatus, characterized in that the shaking motion is performed before the knurling motion.
According to claim 14,

The control method of the laundry treatment apparatus, characterized in that the duration of the shaking motion is set longer than the duration of the knurling motion.