KR20230111052A - Apparatus for treating laundry - Google Patents

Abstract

The present invention provides a laundry treatment device. In one embodiment, a laundry treatment apparatus may include a cabinet, a drum rotatably provided in the cabinet to accommodate clothes, and formed in a cylindrical shape, one side open to form an inlet, and the other side formed with a drum rear plate, and a driving unit having a rotary shaft coupled to the drum rear plate to provide power for rotating the drum, and a portion where the rotary shaft and the drum are connected may further include a filter layer made of a material that blocks leakage current.

Description

Clothes handling device {APPARATUS FOR TREATING LAUNDRY}

The present invention relates to a laundry treatment device.

A clothes handling device is a device capable of removing dust or foreign matter attached to clothes by applying physical force to clothes, and includes a washing machine, a dryer, a refresher (styler), and the like.

A washing machine is provided to supply water and detergent to clothes to perform a washing operation to separate and remove foreign substances from clothes.

The dryer is classified as an exhaust type dryer or a circulation type dryer. Commonly, it is provided to perform a drying process of removing moisture contained in clothes by generating high-temperature hot air through a heater and exposing the hot air to clothes.

In recent years, dryers are equipped to perform intensive drying processes by omitting components for supplying or draining water to the inside of clothes and omitting a tub for accommodating water inside a cabinet. Accordingly, there is an advantage in improving drying efficiency by directly supplying hot air to a drum accommodating clothes while simplifying the internal structure of the dryer.

Such a dryer may include a drum for accommodating clothes, a hot air supply unit for supplying hot air to the drum, and a driving unit for rotating the drum. In this way, the dryer supplies hot air to the inside of the drum to dry the clothes accommodated in the drum, and rotates the drum to evenly expose the surface of the clothes to the hot air. As a result, the entire surface of the clothes is evenly contacted with the hot air, and drying can be completed.

1 shows the structure of a conventional dryer in which a driving unit is coupled to a rear surface of a cabinet. The dryer structure of FIG. 1 discloses a structure in which the drive unit is fixed to the rear surface of the cabinet and the rotation shaft of the drive unit is coupled to the drum to rotate the drum. The dryer may include a cabinet 1 forming an exterior, a drum 2 rotatably provided inside the cabinet 1 to accommodate clothes, and a drive unit 3 provided to rotate the drum 2.

The driving unit 3 may be provided to rotate the drum 2 by being disposed on the rear surface of the drum 2 . The driving unit 3 may be coupled to and fixed to the rear panel 11 forming the rear surface of the cabinet 1 . Thus, the drive unit 3 is fixed to the cabinet 1 and can rotate the drum 2 .

Conventional dryers disclose that the drum 2 and the driving unit 3 are directly connected and rotated, but do not recognize the problem that leakage current generated in the driving unit 3 is transmitted to the drum 2 along the rotating shaft. The leakage current transmitted from the driving unit 3 to the drum 2 is accumulated in the clothes, and the current is felt when the user touches the clothes.

An object of the present invention is to provide a laundry treatment apparatus capable of solving the problem of causing a user to feel uncomfortable when current builds up in a drum.

An object of the present invention is to provide a laundry treatment apparatus in which leakage current of a driving unit and/or a cabinet is prevented from being transferred to a drum.

An object of the present invention is to provide a laundry treatment apparatus capable of preventing static electricity from accumulating in a drum by transmitting static electricity generated by rotation of the drum to the outside of the drum while preventing leakage current of the drive unit and/or cabinet from flowing into the drum.

The problem to be solved by the present invention is not limited thereto, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention provides a laundry treatment apparatus capable of solving the above problems. In one embodiment, a laundry treatment apparatus may include a cabinet, a drum rotatably provided in the cabinet to accommodate clothes, and formed in a cylindrical shape, one side open to form an inlet, and the other side formed with a drum rear plate, and a driving unit having a rotary shaft coupled to the drum rear plate to provide power for rotating the drum, and a portion where the rotary shaft and the drum are connected may further include a filter layer made of a material that blocks leakage current.

In one embodiment, a first tooth is formed on the rotating shaft, a second tooth meshing with the first tooth is formed on the drum rear plate, and the filter layer may be provided on at least one of the first tooth and the second tooth.

In one embodiment, the drum rear plate and the rotating shaft may be fastened by a fastening member, and the filter layer may be provided at least at a portion where the fastening member contacts the drum rear plate.

In one embodiment, the drum rear plate may further include a mounting plate coupled to the rotating shaft, and the filter layer may be formed on the mounting plate.

In one embodiment, the drum back plate includes a mounting plate coupled to the rotating shaft, and a circumferential plate coupled to the mounting plate and forming a circumference of the drum back plate, and the filter layer is at least the mounting plate and the circumferential plate. It may be formed at a portion in contact with each other.

In one embodiment, the drum rear plate and the rotating shaft may be a conductor.

In one embodiment, the filter layer may be formed on at least one surface of the drum rear plate facing the inner surface of the drum.

In one embodiment, the filter layer may be formed on at least the other surface of the drum rear plate facing the driving unit.

In one embodiment, the drive unit may include a speed reducer and a motor unit, and the rotation shaft may be connected to the speed reducer.

In one embodiment, the material may have resistance to block leakage current leaked from the drive unit from flowing to the drum, and discharge static electricity accumulated in the drum by rotation of the drum.

In one embodiment, the material may have a resistance greater than or equal to 10 ⁶ ohm and less than or equal to 10 ⁹ ohm.

In one embodiment, the material may include a conductive polymer material.

In one embodiment, the material may be composed of urethane and a conductive polymer material.

In one embodiment, the drum rear plate includes a mounting plate coupled to the rotating shaft, a circumferential plate coupled to the mounting plate and forming a circumference of the drum rear plate, and a fastening member connecting the mounting plate and the circumferential plate, and the fastening member may be provided with an insulating material inserted therein.

According to various embodiments of the present disclosure, it is possible to solve the problem of causing discomfort to the user by accumulating current in the drum.

According to the present invention, leakage current of the drive unit and/or cabinet can be prevented from being transferred to the drum.

According to the present invention, static electricity generated by the rotation of the drum is transferred to the outside of the drum, preventing static electricity from being accumulated in the drum, while leakage current of the drive unit and/or the cabinet does not flow into the drum.

The effects of the present invention are not limited to the above-mentioned effects, and effects not mentioned will be clearly understood by those skilled in the art from this specification and the accompanying drawings.

1 shows the structure of an embodiment of a conventional dryer.
2 illustrates a laundry treatment apparatus according to an embodiment of the present invention.
3 illustrates the interior of a laundry treatment apparatus according to an embodiment of the present invention.
4 is an exploded perspective view of a laundry treatment apparatus according to an embodiment of the present invention.
5 illustrates a reducer of a laundry treatment apparatus according to an embodiment of the present invention.
6 is an enlarged cross-sectional view of the inside of the dotted line in FIG. 3 .
7 is a perspective view of a mounting plate according to an embodiment of the present invention.
8 is a front view of a structure in which a rear plate and a base of a laundry treatment apparatus according to an embodiment of the present invention are coupled.
FIG. 9 is an exploded view illustrating the coupling of a reducer and a motor to the rear of a rear plate of a laundry treatment apparatus according to an embodiment of the present invention.
10 illustrates a coupling structure between a reducer and a stator of a laundry treatment apparatus according to an embodiment of the present invention.
11 illustrates a coupling structure between a speed reducer and a motor unit of a laundry treatment apparatus according to an embodiment of the present invention.

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

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

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

Also, 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 other components may exist in the middle. It should be understood. 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 'comprise' or 'having' are only intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

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'.

2 shows the exterior of the laundry treatment apparatus of the present invention. This will be described with reference to FIG. 2 .

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 .

An operation panel 117 may be installed on the front panel 110 . The operation 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 processes. Inside the cabinet 100, a control box may be installed to control the internal configuration to execute a control command input through the input unit 118. The control box may be connected to components inside the laundry handling apparatus and control the corresponding components to execute an input command.

The input unit 118 may include a power supply request unit for requesting power supply of the clothes handling apparatus, a course input unit for allowing 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.

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 clothes. 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.

3 is a simplified view of the inside of the laundry treatment apparatus according to the present invention. This will be described with reference to FIG. 3 .

The laundry treatment apparatus of the present invention may include a drum 200 accommodated inside the cabinet 100 to accommodate clothes, a driving unit for rotating the drum 200, a heat exchange unit 900 provided to supply hot air to the drum 200, and a base 800 provided with a circulation passage unit 820.

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 driving unit may be provided to be directly connected to the drum 200 so as to rotate the drum 200 . For example, the driving unit may be provided in a direct drive unit (DD) type. Accordingly, the driving unit may directly rotate 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, clothes inside the drum 200 may be rotated at a much higher RPM than the RPM at which clothes may rotate while attached to the inner wall of the drum 200 .

However, if the clothes inside the drum 200 are continuously adhered to the inner wall of the drum 200 and rotated, drying efficiency is reduced because the portion attached to the inner wall of the drum 200 is not exposed to hot air.

If the rotor 520 is rotated at a low RPM to be rolled or stirred inside the drum 200 without being attached to the inner wall of the drum 200, a problem may occur in which the output or torque that can be generated by the driving unit is not properly utilized.

Accordingly, the driving unit of the laundry treatment apparatus according to an embodiment of 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 driving 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 does not need to be discharged to the outside of the drum 200. Therefore, through holes 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 plate 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 200 may be connected to the rear of the drum rear plate 220 . The drum body 210 and the drum rear plate 220 may be coupled by a fastening member such as a bolt, but are not limited thereto, and if the drum body 210 and the drum rear plate 220 are coupled to rotate together, they can be coupled using various methods.

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 212 may be provided in plurality and may be provided spaced apart from each other. The reinforcing beads 212 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 clothing is 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. The strengthening beads 212 increase the durability of the drum and increase the drying efficiency of the laundry treatment machine.

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.

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

The laundry treatment apparatus according to an embodiment may further include a support 400 provided to fix or support the drum 200 or the drive unit 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 front panel 110 (see FIG. 3) forming the front surface of the cabinet 100 and the drum 200. In addition, the front plate 410 may be provided with an input communication hole 412 communicating with the input port 211 . Since the input 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, the duct communication hole 417 may guide the air discharged through the inlet 211 to the circulation passage part 820 located in the lower part 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 (not shown) may filter air discharged from the drum 200 to prevent foreign substances from accumulating inside the laundry treatment machine. In addition, the filter unit (not shown) can prevent foreign substances from accumulating and interfering with air circulation.

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 . The rear of the drum 200 is spaced apart from the rear plate 420 , but may be indirectly supported by the rear plate 420 by being connected to the motor unit 500 mounted on the rear plate 420 . As a result, an area where the drum 200 contacts or rubs against the support 400 is minimized, and unnecessary noise or vibration can 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 provided on the rear surface of the front plate 410 . The support wheel 415 is rotatable. 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 a 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.

A plurality of support wheels 415 may be provided. The plurality of 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 unit 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 unit 820 may include 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, and a moving duct 822 connecting the inlet duct 821 and the discharge duct 823.

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 on the rear side of the circulation passage part 820 .

The discharge 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 on the 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.

A heat exchange unit 900 is provided inside the circulation passage unit 820 . The heat exchange unit 900 may include a first heat exchanger 910 that cools air and a second heat exchanger 920 that heats the air cooled by the first heat exchanger 910 .

The first heat exchanger 910 may dehumidify air discharged from the drum 200 . 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 that rotates the circulation flow path fan 950 . The circulation flow path fan 950 may receive rotational power supplied by the circulation flow path fan motor 951 and rotate. 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 passage fan motor 951 may be located behind the blower 8231. When the circulation flow path fan 950 is rotated by the circulation flow path fan motor 951, the air inside the circulation flow path unit 820 may be discharged to the outside of the circulation path unit 820 through the blowing unit 8231.

Since the inlet 211 of the drum 200 is preferably disposed at a relatively high position in order for the user to easily withdraw the clothes located inside the drum 200, the circulation passage part 820 and the heat exchange part 900 It will be preferable to be disposed at the lower part of the drum 200.

A rear plate 420 for guiding air discharged from the circulation passage unit 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 plate 220 . The circulation passage unit 820 may receive air inside the drum 200 through the front plate 410 . Air from the son ring passage 820 may be supplied to the drum 200 through the rear plate 420 . 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 for guiding air discharged from the circulation passage unit 820 to the rear plate 420 . The connector 850 may guide discharged air to be evenly distributed throughout the rear plate 420 . The connector 850 may be installed in the blowing unit 8231. That is, the connector 850 may guide air discharged from the blower 8231 to the rear plate 420 . Hot air supplied to the rear plate 420 may flow into the drum 200 through the drum rear plate 220 .

The drum 200 of the laundry treatment apparatus according to an embodiment of the present invention may be directly connected to and rotated by a drive unit positioned at the rear of the drum 200 instead of being coupled to a belt and rotated indirectly. Therefore, unlike the drum of a conventional dryer having a cylindrical shape with open front and rear ends, the rear of the drum 200 of the laundry treatment apparatus according to an embodiment of the present invention is shielded and can be directly coupled to the driving unit.

As described above, the drum 200 may include a drum body 210 having a cylindrical shape and accommodating clothes, and a drum rear plate 220 coupled to the rear of the drum body 210 to form the rear surface of the drum.

The drum rear plate 220 may provide a coupling surface directly coupled to the driving unit. That is, the drum rear plate 220 may be provided to rotate the entire drum 200 by being connected to the driving unit and receiving rotational power.

The drum rear plate 220 may include a drive shaft coupling part 300 connecting the driving unit and the drum rear plate 220 . The drive shaft coupling part 300 may be provided on the drum rear plate 220 to form the center of rotation of the drum 200 . The drive shaft coupling part 300 may be provided integrally with the drum rear plate 220, but may be provided with a material having greater rigidity or durability than the drum rear plate 220 in order to be firmly coupled to the rotational shaft that transmits power. The driving shaft coupling part 300 may be seated on and coupled to the drum rear plate 220 so as to form the same axis as the center of rotation of the drum rear plate 220 . The drive shaft coupling part 300 may be provided as a bushing or nut coupled to the drum rotation shaft 6341.

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

A portion where the mounting plate 222 and the driving unit are coupled and a portion where the mounting plate 222 and the circumferential plate 221 are coupled may be covered by the cover member 229 . That is, the circumferential plate 221 is exposed inside the drum 200, but the portion where the mounting plate 222 and the drive unit are coupled and the portion where the mounting plate 222 and the circumferential plate 221 are coupled are covered by the cover member 229 and are not exposed to the outside.

A suction hole 224 penetrating the circumferential plate 221 is formed in the drum rear plate 220 . The front and rear surfaces of the drum rear plate 220 communicate with each other through the suction hole 224 . Air may be introduced to the rear of the drum 200 through the suction hole 224 . Hot air supplied through the circulation passage part 820 may be introduced into the drum 200 through the suction hole 224 . The suction hole 224 may be provided with a plurality of holes provided through the drum rear plate 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 speed reducer 600 that reduces rotational force of the motor unit 500 and transmits it to the drum 200 . 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 .

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

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, a base 800 provided below the drum to provide a space for circulating air inside the drum or condensing moisture contained in the air, a motor unit 510, 520, 540 located at the rear of the drum to provide rotational power to the drum, and rotation of the motor unit It may include a reducer 600 that decelerates and transmits the deceleration to the drum, and a rear cover 430 coupled to the rear plate 420 to prevent 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 .

A front gasket 413 may be provided on the rear surface of the front panel 411 so as to surround the outside of the insertion communication hole 412 in the radial direction. The front gasket 413 may accommodate a part of the drum body 210 . The front gasket 413 may rotatably support the drum body 210 . The front gasket 413 may be provided to be in contact with the outer circumferential surface or the 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 plastic resin or an elastic material, and a separate sealing member is additionally coupled to the front gasket 413 to prevent clothing or hot air from escaping from the drum body 210 to the front plate 410.

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 between 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 may be introduced into the duct connection portion 416 through the duct communication hole 417, and may be guided to the circulation passage portion 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 (not shown) may be installed in the duct connection unit 416 to filter foreign materials or lint from the air discharged from the drum 200 and prevent foreign materials from entering the circulation passage unit 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 penetrating the front panel 411 to form a storage tank support hole 414 through which the storage tank 120 (see FIG. 2) in which condensate generated during the drying process is stored can be drawn out or supported. When the water storage tank support hole 414 is provided on the upper side, the user does not have to bend at the waist when withdrawing the water storage tank 120, so the user's convenience is increased.

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

The drum rear plate 220 includes a circumferential plate 221 connected to the drum body 210, a suction hole 224 formed to pass through the circumferential plate 221, and a mounting plate 222 coupled to the drum rotating shaft 6341 which is provided at the center of rotation of the drum rear plate 220. The drum rear plate 220 may further include a reinforcing rib 225 extending from the circumferential plate 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 rigidity of the drum rear plate 220 from being reduced 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 plate 221 .

In addition, the drum back plate 220 may further include a circumferential rib 227 extending in the circumferential direction of the drum back plate 220 to connect the reinforcing ribs 225 to each other. The reinforcing ribs 225 and the circumferential ribs 227 have an effect of preventing the drum rear plate 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 . The discharge duct 823 may be provided at an end of the moving duct 822 to guide air to the drum 200 .

The blower 8231 may be positioned downstream of the discharge duct 823, and the blower 8231 may provide a space in which a circulation flow fan 950 (see FIG. 3) is installed. When the circulation fan passage fan 950 operates, air introduced into the inflow duct 821 may be discharged to the upper part of the blowing unit 8231.

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 910 (see FIG. 3) and the second heat exchanger 920 (see FIG. 3) to supply compressed refrigerant. Since the compressor 930 may be provided so as not to directly exchange heat with circulated air, it may be located outside the circulation passage part 820 . In addition, the heat exchange unit 900 may include a circulation flow path fan motor 951 that is supported at the rear of the blowing unit 8231 and rotates the circulation flow path fan 950 . The circulation flow path fan motor 951 may be coupled to the rear of the blowing unit 8231.

The laundry treatment apparatus according to an embodiment of the present invention may further include a connector 850 coupled to the circulation passage unit 820 and guiding the hot air discharged from the circulation passage unit 820 to the rear or rear plate 420 of the drum 200. The connector 850 may be disposed above the discharge duct 823 to pass through the second heat exchanger 920 and guide heated air 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 flow fan 950 to the rear plate 420 . That is, the connector 850 may be provided such that the area of the passage 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 behind the drum 200 . The rear plate 420 may include a rear panel 421 positioned to face the front plate 410, and a duct unit 423 provided to be recessed in the rear panel 421 to form a passage through which air flows and to guide air discharged from the circulation passage unit 820 to the drum.

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

As described above, the driving unit may mean a combination of the reduction gear 600 and the motor unit 500. Meanwhile, 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 unit 423 may be provided to accommodate a part of the drum rear plate 220 . The duct unit 423 may form a passage through which air moves along with the drum rear plate 220 .

The driving unit may be installed on the mounting unit 425 to prevent interference with the duct unit 423 . That is, 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 the 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 to rotate the drum 200 . The motor unit 500 may include a stator 510 generating a rotating magnetic field and a rotor 520 provided to rotate 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 . A driving shaft is 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 530 through the washer unit 540 . The washer unit 540 may perform a function of connecting the driving shaft 530 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 530 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 530 to change the rpm of the driving shaft 530 but increasing torque, and the gear coupling body is coupled to the drum 200 and rotates the drum. It can be connected to the drum rotation shaft 6341. Therefore, when the drive shaft 530 rotates, the drum rotation shaft 6341 rotates at a slower rpm than the drive shaft 530 but can rotate with a higher torque.

The rear plate 420 of the cabinet 100 may be provided as a relatively thin plate. The rear plate 420 may be made of a steel plate. The rear plate 420 may be made of a metal material.

In another embodiment of the present invention, the laundry treatment apparatus may be fixed by coupling the motor unit 500 to the reduction gear 600. Thus, the reduction gear 600 itself can 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 of the entire driving unit. Therefore, when vibration is transmitted to the driving unit or an external force is transmitted, when the reduction gear 600 tilts or vibrates, the motor unit 500 always tilts or vibrates simultaneously with the reduction gear 600. As a result, the reduction gear 600 and the motor unit 500 may form one vibration system, and the reduction gear 600 and the motor unit 500 may maintain a fixed state without moving relative to each other.

Among the motor units 500, the stator 510 may be directly coupled to and fixed to the reduction gear 600. As a result, the installed position of the driving shaft 530 relative to the reduction gear 600 may not be variable. 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 . 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 gap between 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 can be fundamentally blocked.

The drum rotation shaft 6341 is provided to extend from the inside of the reducer 600 toward the drum 200, and may vibrate with the reducer 600 and tilt with the reducer 600. That is, the drum rotation shaft 6341 is provided to rotate in the reducer 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 driving shaft 530 may be maintained in a matched state.

The reducer 600 may be coupled to and fixed to the rear plate 420 . In this case, since the reducer 600 will tilt or vibrate while being coupled to the rear plate 420, the rear plate 420 can be regarded as serving as the center of the vibration system including the reducer 600, the motor unit 500, and the drum 200.

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.

A sealing part 450 may be provided between the drum rear plate 220 and the rear plate 420 . The sealing unit 450 may seal the space between the drum rear plate 220 and the rear plate 420 so that air introduced into the duct unit 423 of the rear plate 420 does not flow out and flows into the suction hole 224 .

The sealing unit 450 may be disposed on the outer and inner surfaces of the duct unit 423 , respectively. A first seal 451 may be provided outside the duct unit 423 in the radial direction. A second seal 452 may be provided inside the duct unit 423 in the radial direction. The first sealing 451 can prevent hot air from leaking outward in the radial direction between the drum rear plate 220 and the duct unit 423 . The second sealing 452 can prevent hot air from leaking radially inward between the drum rear plate 220 and the duct unit 423 .

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 plate 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 seal 450 by the drum rear plate 220 . Therefore, it is preferable that the sealing unit 450 is made of a material capable of sealing between the drum rear plate 220 and the duct unit 423 without deteriorating performance even with frictional force and frictional heat generated by rotation.

The motor unit 500 or the 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, there is a possibility that the load transmitted to the reducer 600 by the reducer 600 and the drum 200 causes bending or deformation. That is, the rigidity of the rear plate 420 needs to be secured in order to install the reduction gear 600 and the motor unit 500. 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 reduction gear 600, the rear plate 420, and the bracket 700 may be simultaneously penetrated and coupled using a fastening member 681 (see FIG. 6). The rear plate 420 may be coupled with the bracket 700 to ensure rigidity. A driving unit may be coupled to the rear plate 420 having rigidity.

Meanwhile, the reduction gear 600 may be coupled to the bracket 700 first, 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 .

When the driving unit 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 or the reduction gear 600 from being coupled to the rear of the rear plate 420 from being exposed. Also, the duct unit 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 reducer 600 from being exposed to the outside. The rear cover 430 may be disposed to be spaced apart from the duct unit 423 and the driving unit. 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 .

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

The reducer 600 may include reducer housings 610 and 620 forming an exterior. The reducer housings 610 and 620 may include a first housing 610 provided to face the drum 200 (see FIG. 4) and a second housing 620 facing the motor unit 500 (see FIG. 4).

The reducer 600 may include a gear combination body. The gear coupling body may be provided to receive power from the motor unit 500 and convert the RPM of the motor unit 500 to a small RPM, but increase the torque value and transmit it to the drum 200 . Most of the gear combination body is accommodated inside the second housing 620, and the first housing 610 may be provided to shield the inside of the reducer 600. As a result, the overall thickness of the reducer 600 can be reduced. The detailed configuration of the gear coupling body will be described later.

The first housing 610 may include a first housing blocking body 611 provided to shield the second housing 620 and a first housing shaft portion 612 extending in a direction away from the second housing 620 from the first housing blocking body 611. 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 portion 613 provided to support the motor unit 500 . The stator coupling part 613 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 stator coupling portion 613 may include a stator coupling groove 615 to which the motor unit 500 may be fastened. The stator coupling groove 615 may be recessed in the stator coupling portion 613 . A separate fastening member 617 (see FIG. 6) may be inserted into the stator coupling groove 615. The stator coupling unit 613 and the motor unit may be coupled using the fastening member 617 .

The first housing 610 may further include a coupling guide 614 for guiding coupling of the motor unit 500 . 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 (see FIG. 6) when the stator 510 is coupled to the stator coupling portion 613. Through this, assemblability can be improved.

The second housing 620 may accommodate a gear coupling body therein. The second housing 620 has a second housing coupling body 621 coupled to the first housing 610, a second housing blocking body 622 extending in a direction away from the first housing 610 from the second housing coupling body 621 to form a space in which a gear coupling body is accommodated, and an inner circumferential surface of the second housing blocking body 622 being far from the first housing 610. It may include a second housing bearing part 623 (see FIG. 6) that extends and supports the driving shaft 530.

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 530 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 623 rotatably supporting the drive shaft 530 are coaxially coupled.

The driving shaft 530 may be inserted into the second housing 620 and rotatably supported inside the second housing 620 . A washer unit 540 coupled to the rotor 520 may be coupled to the driving shaft 530 . The washer unit 540 extends in the radial direction from the outer circumferential surface of the receiving body 542 and the receiving body 542 in which the shaft support hole 543 in which the drive shaft 530 is accommodated is formed at the center, and the rotor 520 (see FIG. 6) It may include a washer coupling body 541 forming a surface to which it is coupled. 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 600 . The washer coupling protrusion 5411 may be coupled to a receiving groove (not shown) formed in the rotor 520 .

The washer unit 540 may include one or more washer coupling holes 5412 passing through the washer coupling body 541 . The washer coupling hole 5412 may be used to couple the rotor 520 and the washer unit 540 by inserting a fastening member (not shown) penetrating the rotor 520 .

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

FIG. 6 is an enlarged and detailed cross-sectional view of a coupling portion between a driving unit and a rear surface of a drum briefly shown in FIG. 3 .

The driving unit may include a motor unit 500 that generates rotational power and a speed reducer 600 that reduces the rotational speed of the motor unit 500 and transmits it to the drum. The reducer 600 may include a drum rotation shaft 6341 that rotates the drum 200.

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 528 may be disposed on an inner circumferential surface of the rotor 520 .

The permanent magnet 528 located on the inner circumferential surface of the rotor 520 can move in a specific direction by the rotating magnetism generated from the stator 510, and the permanent magnet 528 can be fixed to the inner circumferential surface of the rotor 520. Accordingly, the rotor 520 may 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 520 .

The driving shaft 530 may be coupled to the rotor 520 through the washer unit 540 . The drive shaft 530 may be directly connected to the rotor 520, but when connected through the washer unit 540, it may be more firmly coupled to the rotor 520, so that the rotational force of the rotor 520 may be transmitted more effectively. 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 gear coupling body 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 the inner circumferential surface of the ring gear 633, and a sun gear 631 gear-coupled with the planetary gear 632 and rotating together with the driving shaft 530 may be provided inside the ring gear 633.

The sun 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 520 rotates as an example of operation of the gear coupling body 630, when the drive shaft 530 and the sun gear 631 connected to the drive shaft 530 rotate, the planetary gear 632 geared at the outer circumferential surface of the sun gear 631 can be gear-engaged 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 600 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 rotation center of the second carrier 6343 in a direction away from the motor unit 500. 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 200 to rotate the drum 200 . As described above, the drum rotation shaft 6341 may be coupled to the drum 200 through a connecting body such as the drive shaft coupling part 300, and may be directly coupled to the drum 200 without a separate connecting body.

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 rotating 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 may pass through the first housing 610 and the second housing 620 at the same time and couple the two members. In addition, the reducer fastening member 681 simultaneously penetrates the first housing 610, the second housing 620, and the rear plate 420 to couple the first housing 610 and the second housing 620, and simultaneously fix the reducer 600 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. Accordingly, the bracket 700 may be used to secure the rigidity of the rear plate 420 when the reducer 600 is coupled to 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 of the rear plate 420 to secure rigidity to which the reduction gear 600 can be coupled, and the reduction gear 600 can be coupled to the rear plate 420 and the bracket 700 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 600 to each other. 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 may 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 at the front and by the first housing 610 at the rear, rigidity can be secured even when the reduction gear 600 is coupled. However, it is not limited thereto, and only the first housing 610 and the second housing 620 are first coupled using the speed reducer fastening member 681, and then the speed reducer 600 is coupled to the rear plate 420 using a separate fastening member.

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 stator coupling groove 615 that is recessed.

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 510 . The fixing rib 512 may be coupled to the stator coupling part 613 . The fixing rib 512 and the stator coupling portion 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. There is a risk that the direction of the drum rotation shaft 6341 is distorted by the 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 drive shaft 530 will be similarly distorted by the first housing 610. 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.

By 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 wear of the gear coupling body 630 caused by the shaft twist of the drum rotation shaft 6341 and the drive shaft 530, reduction in efficiency of power transmission, and reduction in durability and reliability can be prevented.

The mounting plate 222 constitutes the drum rear plate 220 . The mounting plate 222 is combined with the circumferential plate 221 to constitute the drum rear plate 220 . The drum rear plate 220 is combined with the cylindrical drum body 210 to form the drum 200. As an example, although it has been described that the drum rear plate 220 is formed of a combination of the mounting plate 222 and the circumferential plate 221, the drum rear plate 220 may be formed as a single plate.

The driving unit is connected to the mounting plate 222 . The drum rotation shaft 6341 of the driving unit is connected to the mounting plate 222 of the drum 200. First teeth 6346 (a first teeth) are formed on the drum rotating shaft 6341 . The first saw tooth 6346 is formed in the shape of an external toothed wheel along the circumference of the drum rotation shaft 6341. The first teeth 6346 are exposed to the outside of the reducer 600.

7 is a perspective view of a mounting plate according to an embodiment of the present invention. Further referring to FIG. 6 and FIG. 7 , the mounting plate 222 and the filter layer 2229 will be described. The mounting plate 222 includes a central portion 2223 and a flange portion 2224. A coupling hole 2227 is formed at the center of the central portion 2223 . Second teeth 2228 are formed around the coupling hole 2227 . The second tooth 2228 is formed in the shape of an internal toothed wheel. The second cog 2228 meshes with the first cog 6346.

A filter layer 2229 made of a material that blocks leakage current is formed on at least one of the first saw teeth 6346 and the second saw teeth 2228. The filter layer 2229 may be provided by coating any one or more of the first teeth 6346 and the second teeth 2228 . In an embodiment, a coating is formed on a portion of the second saw teeth 2228 in contact with the first teeth 6346. The filter layer 2229 is provided at a portion where the drum rotation shaft 6341 and the drum 200 are connected. In an embodiment, the first teeth 6346 of the drum rotation shaft 6341 may be formed in the filter layer 2229. Alternatively, the filter layer 2229 may be formed on the second teeth 2228 of the mounting plate 222 constituting the drum 200 .

A material constituting the filter layer 2229 is provided with a resistance of 10 ⁶ ohm or more and 10 ⁹ ohm or less. In other words, the material constituting the filter layer 2229 is provided with a resistance greater than 10 ⁶ ohms and less than 10 ⁹ ohms. The filter layer 2229 blocks leakage current leaked from the drive unit from flowing to the drum 200, and static electricity accumulated in the drum 200 is discharged by rotation of the drum 200. In specifying the scope of the present invention, it is described that the resistance is 10 ⁶ ohm or more and 10 ⁹ ohm or less, but it does not mean that it mathematically and physically completely belongs to the corresponding range, and substantially the same range, equivalent range, and numerical range for avoiding the scope of the present invention should be considered to be included in the claims.

The inventors of the present invention have found that leakage current flows to the surface of the drum 200 as the insulation between the drive unit and the drum 200 is not good. The leakage current transmitted to the drum 200 is accumulated in the clothes, and the current is felt when the user touches the clothes. The present inventors recognized the problem and insulated the drum 200 so that leakage current does not flow, but further recognized the problem that static electricity generated by the rotation of the drum 200 is not discharged due to this insulation. Specifically, the present inventors recognized that electrical separation between the drum 200 and the drive unit connected to the cabinet 10 is necessary to prevent leakage current measured in the cabinet 10 from entering the drum 200, and further recognized the problem that static electricity generated by the rotation of the drum 200 cannot be removed when the drum 200 and the drive unit are insulated for electrical separation.

The present inventors recognized the need to block leakage current transmitted from the driving unit to the drum 200 while discharging static electricity accumulated in the drum 200 by the rotation of the drum 200, and focused on the charging phenomenon according to resistance to solve the problem. [Table 1] below is a table showing the charging phenomenon according to the resistance.

Charging phenomenon according to resistance Surface Resistivity (Ω) electrification phenomenon 10 ¹³ and above Charge builds up 10 ¹³ ~10 ¹² Decays very slowly after electrification 10 ¹² ~10 ¹⁰ Attenuated immediately after charging 10 ⁹ ~10 ⁶ hardly ever fight 10 ⁶ or less not grandiose at all

The inventors of the present invention provided a material having a specific resistance of 10 ⁶ ohm or more and 10 ⁹ ohm or less as a coating on a portion where the driving unit and the drum 200 are connected. A material with a specific resistance of 10 ⁶ Ω or less cannot block leakage current as it has conductor characteristics. If the specific resistance is more than 10 ⁹ Ω, it has non-conductive characteristics and electricity does not flow, so static electricity is not discharged. The present inventors recognized that when the specific resistance is 10 ⁹ to 10 ⁶ , leakage current flowing into the drum 200 is blocked, and static electricity generated by rotation of the drum 200 is discharged.

In an embodiment, as a material having a specific resistance of 10 ⁶ ohm or more and 10 ⁹ ohm or less, a conductive polymer material may be provided. The conductive polymer may include polyamide. The conductive polymer material may include Poly(3,4-ethyleneioxythiophene).

The conductive polymer may be provided together with urethane. Materials composed of conductive polymers and urethane have a hard surface, are resistant to scratches, and have excellent abrasion resistance and heat resistance. In addition, it may be applied to the surface using a dipping method or a spray method. If the filter layer 2229 is broken, leakage current may occur again, so it is preferable to use a material having excellent wear resistance and heat resistance.

The filter layer 2229 may be provided by being applied to the surface using a dipping method, a spray method, or the like. In an embodiment, the filter layer 2229 may be formed by preparing a mounting plate 222 and dipping the mounting plate 222 in the above-described material. Alternatively, the filter layer 2229 may be formed by preparing the mounting plate 222 and spraying the above-described material on the mounting plate 222 .

The filter layer 2229 may be provided by coating any one or more of the first teeth 6346 and the second teeth 2228 . In the illustrated embodiment, the filter layer 2229 is provided by coating the second teeth 2228. In addition, the filter layer 2229 may be formed at a portion where the mounting plate 222 and the drive shaft coupling portion 300 come into contact. That is, the filter layer 2229 may be provided by coating any one or more of the mounting plate 222 and the driving shaft coupling part 300 . In the illustrated embodiment, a filter layer 2229 is provided by coating a portion of the mounting plate 222 in contact with the drive shaft coupling portion 300 .

The filter layer 2229 may be formed at least at a portion where the mounting plate 222 and the peripheral plate 221 come into contact. As the leakage current of the mounting plate 222 is not transferred to the circumferential plate 221 by the filter layer 2229, leakage current from being transferred to clothes inside the drum 200 can be blocked.

The filter layer 2229 may be formed on at least one surface of the drum rear plate 220 facing the inner surface of the drum 200 . In the embodiment, the filter layer 2229 is formed on one side of the mounting plate 222 facing the inner surface of the drum 200 . As one surface facing the inner surface of the drum 200 comes into contact with the drive shaft coupling part 300, a filter layer 2229 may be formed on the surface facing the inner surface of the drum 200 to block leakage current. In addition, in the embodiment, one surface facing the inner surface of the drum 200 on the mounting plate 222 and the circumferential plate 221 are in contact with each other so that the mounting plate 222 and the circumferential plate 221 can be coupled. A filter layer 2229 can be formed on one surface facing the inner surface of the drum 200 to block leakage current.

The filter layer 2229 may be formed on at least the other surface of the drum rear plate 220 facing the driving unit. In one embodiment, the filter layer 2229 may be coated on the entire surface of the mounting plate 222 by a dipping process in the process of forming the filter layer 2229 .

In an embodiment, both the mounting plate 222 and the drum rotation shaft 6341 may be formed of a conductor. For example, the mounting plate 222 and the drum rotation shaft 6341 may be formed of a steel material. Since the mounting plate 222 is configured to receive rotational force from the drum rotation shaft 6341, high rigidity is required. Therefore, the mounting plate 222 is preferably selected from a material having high rigidity. If the mounting plate 222 is provided as a conductor, there is the problem of leakage current described above, but according to an embodiment of the present invention, leakage current can be blocked by the filter layer 2229.

The flange portion 2224 of the mounting plate 222 is formed with a through hole 2225 through which the fastening member 2221 passes. The flange portion 2224 interviews the peripheral plate 221 . The flange portion 2224 of the mounting plate 222 and the circumferential plate 221 are coupled by a fastening member 2221 .

8 illustrates a base and a rear plate according to an embodiment of the present invention. This will be described with reference to FIG. 8 .

The rear plate 420 may be located behind the drum 200 . The rear plate 420 may guide the hot air discharged from the circulation passage unit 820 to the drum. That is, the rear plate 420 may be positioned behind the drum 200 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 drum rear plate 220 and a duct unit 423 provided to be recessed backward from the rear panel 421 to form a flow path. The duct unit 423 may be provided by being pushed backward from the rear panel 421 . The duct unit 423 may be provided to partially accommodate the drum rear plate 220 .

The duct part 423 may include an inlet part 4233 positioned behind the circulation passage part 820 and a flow part 4231 positioned behind the drum 200 . The moving part 4231 may be provided to accommodate a portion of the drum 200 . The moving part 4231 may partially accommodate the drum 200 to form a flow path provided behind the drum 200 .

The moving part 4231 may be provided in an annular shape to face the suction hole 224 formed in the drum rear plate 220 . The moving part 4231 may be formed by being recessed in the rear panel 421 . That is, the moving part 4231 is provided so that the front is open, and may form a flow path together with the rear surface of the drum 220 .

When the front of the moving part 4231 is provided to be open, the hot air moved to the moving part 4231 can be directly moved to the drum 200 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 portion 425 provided inside the moving portion 4231 in the radial direction. The mounting unit 425 may provide a space where the reduction gear 600 or the motor unit 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.

The flow part 4231 may include an outer 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 .

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 200 by preventing the hot air from leaking backward 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 4233 may be positioned to face the circulation passage 820 . The inlet 4233 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 . A flow path is formed inside the connector 850 to guide 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.

Connector 850 may be positioned to face 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 flow into the moving part 4231 and be prevented from flowing 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 blower 8231 increases. An upper end of the connector 850 may be positioned along a circumferential extension of the outer floating 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 200 . 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 may also increase in width as it moves away from the blowing portion 8231. 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 200 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 (refer to FIG. 4 ) preventing hot air from leaking into the separation space between the drum 200 and the flow unit 4231 . The sealing part 450 may be positioned along the circumference of the moving part 4231 .

The first seal 451 may be provided along an outer circumference of the moving part 4231 . The first sealing 451 may be provided between the outer circumference of the drum 200 and the moving part 4231 . In addition, the first seal 451 is provided in contact with both the drum rear plate 220 and the rear plate 420 to more effectively prevent leakage. 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 200 and the connector 850 .

The second seal 452 may be provided along the inner circumference of the moving part 4231 . The second seal 452 may be provided between the inner circumference of the drum 200 and the moving part 4231 . In addition, the second seal 452 may be provided in contact with both the drum rear plate 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 machine, continuous friction is applied to the seal 450 by the drum rear plate 220 . Therefore, it is preferable that the sealing unit 450 is made of a material that can seal between the drum rear plate 220 and the moving unit 4231 without deteriorating performance even with frictional force and frictional heat generated by rotation.

9 illustrates a coupling structure of a rear plate, a reducer, and a motor unit according to an embodiment of the present invention. This will be described with reference to FIG. 9 .

The reducer 600 may be supported by the rear plate 420 and the motor unit 500 may be coupled to the reducer 600 . That is, the rear plate 420 may be provided to support both the reduction gear 600 and the motor unit 500 . A motor unit 500 and a reduction gear 600 may be positioned behind the rear plate 420 .

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 that interference with the moving part 4231 is prevented.

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 reducer 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 fixed rib 512 extending from the 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. ) may be included.

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 528 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 transmit 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 the washer unit 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 backward 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 .

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

Claims (12)

cabinet;
a drum that is rotatably provided in the cabinet to accommodate clothes, is formed in a cylindrical shape, one side is open to form an inlet, and the other side is formed with a drum rear plate; and
A drive unit for providing power for rotating the drum by being coupled to the drum rear plate,
and a filter layer provided at a portion where the rotary shaft and the drum are connected and having a specific resistance of greater than 10 ⁶ ohm and less than 10 ⁹ ohm. According to claim 1,
A first tooth is formed on the rotating shaft,
The drum rear plate is formed with second teeth meshing with the first teeth,
The laundry treatment apparatus wherein the filter layer is provided on at least one of the first saw teeth and the second saw teeth. According to claim 1,
The drum rear plate and the rotating shaft are fastened by a fastening member,
The filter layer is provided at least in a portion where the fastening member contacts the drum rear plate. According to claim 1,
The drum back plate,
Further comprising a mounting plate coupled to the rotation shaft,
The filter layer is formed on the mounting plate. According to claim 4,
The drum back plate,
a mounting plate coupled to the rotating shaft; and
It is coupled to the mounting plate and includes a circumferential plate forming a circumference of the drum back plate,
The filter layer,
A laundry treatment apparatus formed at least at a portion where the mounting plate and the circumferential plate contact each other. According to claim 1,
The drum rear plate and the rotating shaft are conductors. According to claim 1,
The filter layer,
A laundry treatment apparatus formed on at least one surface of the drum rear plate facing the inner surface of the drum. According to claim 1,
The filter layer,
A laundry treatment apparatus formed on at least the other surface of the drum rear plate facing the driving unit. According to claim 1,
The drive unit includes a reducer and a motor unit,
The rotational shaft is connected to the speed reducer. According to any one of claims 1 to 9,
The filter layer,
The laundry treatment apparatus having resistance to block leakage current leaked from the drive unit from flowing to the drum and to discharge static electricity accumulated in the drum by rotation of the drum. According to any one of claims 1 to 9,
The filter layer,
A clothes handling device containing a conductive polymer material. According to any one of claims 1 to 9,
The filter layer,
A clothes handling device composed of urethane and conductive polymer materials.

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