KR20210122718A - Laundry treating apparuts - Google Patents

Abstract

Disclosed is a clothing treating apparatus which reduces power consumption when drying clothing. The clothing treating apparatus comprises: a cabinet having a slot on the front surface thereof; a door coupled to the cabinet to open and close the slot; a tub arranged in the cabinet, having an opening part communicating with the slot of the cabinet, and providing a space in which water is accommodated; a drum rotatably provided in the tub, and providing a space in which laundry is accommodated; a driving unit rotating the drum; a gasket connecting the slot of the cabinet and the opening part of the tub, and having an inner side providing a laundry entry passage; and a water supply unit supplying water to the tub. The water supply unit can supply water to the tub up to a first water level higher than the lowermost part of the inner side of the gasket. The driving unit can rotate the drum at a first rotating speed at which the centrifugal force acting on laundry in the drum is higher than the gravity acting on the laundry by rotation of the drum while the water level of the tub is the first water level.

Description

Clothes processing equipment {LAUNDRY TREATING APPARUTS}

The present invention relates to a laundry treatment apparatus.

In general, a clothes treatment apparatus may include a washing machine, a dryer, and a device for refreshing clothes. The washing machine may be a washing machine combined with a drying function.

The washing machine rotates a drum in a tub in which water is stored to remove contaminants from the laundry inside the drum. The washing machine may be provided with a heating means for heating water and/or laundry or drying laundry.

The dryer rotates a drum in a cabinet and applies heat to the laundry inside the drum to dry the laundry.

The laundry treatment apparatus may include a heating means for heating or drying laundry. The laundry treatment apparatus may include an electric heater or a heat pump as a heating means.

Conventionally, in the drying process, a hot air drying method in which the laundry is dried by heating the air circulating through the tub and the external circulation passage has been used, and a method of heating the air by arranging a heating wire on the air circulation passage has been used.

In order to use the hot air drying method described above, a gas heater or an electric heater capable of heating a hot wire is required, but the gas heater has problems with safety and exhaust gas, and the electric heater may accumulate foreign substances such as scale and excessive There is an energy consumption problem.

In addition to the hot air drying method described above, there is a low temperature dehumidifying drying method using a heat pump. The heat pump uses the cooling cycle of the air conditioner in reverse, and therefore requires the same components as the evaporator, condenser, expansion valve and compressor.

Furthermore, another problem of the hot air drying method and the low temperature dehumidifying drying method is that it is an indirect drying method using air.

Meanwhile, recently, research on an induction module (or an induction heater) as a new heating means has been made.

A coil is wound on an induction module provided in a laundry treatment apparatus such as a washing machine or a dryer, and heat can be transferred to a heating object (drum of a washing machine) by an induced current generated by applying a current to the coil.

Since the induction module can heat the drum, in the case of a laundry treatment apparatus having an induction module, the laundry is washed without a circulation duct guiding the air discharged from the tub applied to the hot air drying type laundry treatment apparatus back to the tub. drying can be performed.

However, in the case of a laundry treatment apparatus not provided with a circulation duct, there is a problem in that lint is accumulated on the rear surface of the cabinet door, the front of the tub, and the gasket during the drying cycle.

Patent Publication No. 10-2018-0023276 (Mar. 07, 2018) discloses a laundry treatment apparatus to which an induction unit is applied. However, in the structure of the prior patent, there may be a problem in that lint is accumulated on the back of the cabinet door, the front of the tub, and the gasket. Even if the drum is directly inductively heated through the magnetic field generated by the housework and the induction unit, and the heated air is discharged to the outside of the tub, the flow of air introduced from the front of the tub is not formed, as described above. The problem of lint build-up cannot be prevented.

Publication: 10-2018-0023276 (2018.03.07.)

SUMMARY OF THE INVENTION The present disclosure aims to solve the above and other problems.

Another object of the present invention is to provide a laundry treatment apparatus, such as a dryer equipped with an induction heater, a washing machine, a washing machine combined dryer, or an apparatus for refreshing clothes.

Another object of the present invention is to provide a laundry treatment apparatus that performs drying without a duct for circulating air inside the drum.

Another object of the present invention is to provide a laundry treatment apparatus that reduces power consumption during drying.

Another object of the present invention is to provide a laundry treatment apparatus for removing lint accumulated on a door, a tub, a gasket, and the like.

Another object of the present invention is to provide a laundry treatment apparatus that removes lint accumulated in a door, a tub, a gasket, etc. using water in the tub.

Another object of the present invention is to provide a laundry treatment apparatus that removes lint accumulated during a drying process in a subsequent washing and/or rinsing process.

According to one aspect of the present disclosure for achieving the above object, there is provided a laundry treatment apparatus including a tub for providing a space for accommodating water, a drum rotatably provided in the tub, a driving unit for rotating the drum, and water in the tub. Includes a water supply that supplies.

The laundry treatment apparatus further includes a cabinet having an inlet and a door opening and closing the inlet.

The cabinet may form an exterior of the laundry treatment apparatus. The cabinet may have the inlet on its front surface.

The door may be coupled to the cabinet. The door may be coupled to the front surface of the cabinet. The door may be rotatably coupled to the cabinet.

The tub may be disposed inside the cabinet. The tub may have an opening communicating with the inlet of the cabinet. The tub may have an extended cylindrical shape. The opening of the tub may be smaller than a diameter of the cylindrical shape of the tub.

The laundry treatment apparatus includes a gasket connecting the inlet of the cabinet and the opening of the tub. The gasket may provide a laundry access passage. The gasket may have an inner surface, and the inner surface may provide the laundry access passage.

The drum may provide a space for accommodating laundry. The drum may have an elongated cylindrical shape. The drum may have a drum opening communicating with the opening of the tub.

The laundry treatment apparatus includes a driving unit that rotates the drum. The driving unit may be coupled to the tub. The driving unit may be coupled to the rear surface of the tub. The rotating shaft of the driving unit may be connected to the drum through a rear surface of the tub.

The laundry treatment apparatus includes a water supply unit for supplying water to the tub. The water supply unit may be connected to an external water source to supply water to the tub. The water supply unit may include a water supply passage connected to the external water source and a water supply valve for opening and closing the water supply passage.

The laundry treatment apparatus may further include an induction heater for heating the drum. The induction heater may be disposed on an outer surface of the tub.

The induction heater may heat the drum in a state in which the water in the tub is drained. When the induction heater heats the drum, the driving unit may rotate the drum.

The induction heater may heat the drum, and the driving unit may rotate the drum to dry laundry in the drum. The laundry is dried and lint may be separated from the laundry. The separated lint may accumulate in the gasket and the door.

Lint may accumulate on the inner surface of the gasket.

The door may have an inner surface positioned in the laundry access passage in a state in which the inlet is closed. Lint separated from the laundry may be accumulated on the inner surface of the door.

The water supply unit may supply water to the tub up to a first water level. The first water level may be higher than the lowermost portion of the inner surface of the gasket. The first water level may be higher than a lower portion of the drum positioned vertically below the rotation center of the drum. The first water level may be located inside the drum.

The driving unit may rotate the drum at a first rotational speed in a state where the water level of the tub is the first water level. The first rotational speed may be a rotational speed in which a centrifugal force acting on the laundry in the drum by rotation of the drum is greater than a gravity acting on the laundry. The first rotation speed may be 60 rpm or more. The first rotation speed may be 100 rpm.

When the drum rotates at the first rotational speed, the laundry in the drum can rotate integrally with the drum without being separated from the inner peripheral surface of the drum even at the highest point of the drum.

When the drum rotates at the first rotational speed, water in the tub may rise along the inner surface of the tub. When the drum rotates at the first rotational speed, the water of the tub may rise along the inner surface of the tub and flow under the gasket. Water flowing under the gasket may remove lint accumulated under the gasket. Water flowing under the gasket may remove lint accumulated under the door.

The driving unit may accelerate the drum to rotate the drum at a first rotational speed. The driving unit may accelerate the drum while the water level of the tub is the first water level. The driving unit may accelerate the drum to the first rotational speed in a state where the water level of the tub is the first water level.

The driving unit may accelerate the drum to the first rotational speed through a second rotational speed slower than the first rotational speed in a section in which the drum is accelerated to the first rotational speed. The second rotational speed may be a rotational speed at which laundry in the drum rises above a height corresponding to the rotational center of the drum due to the rotation of the drum and then falls apart from the drum.

The second rotation speed may be in the range of 40 rpm to 60 rpm. The second rotation speed may be 46 rpm.

The driving unit may rotate the drum while maintaining the second rotation speed while the water level of the tub is the first water level.

When the rotational speed of the drum passes the second rotational speed in the section in which the drum accelerates, or when the drum rotates while maintaining the second rotational speed, the laundry in the drum is at a height corresponding to the rotational center of the drum. After the abnormal rise, it can be separated from the drum and fall.

The laundry may fall and water in the drum may splash on the gasket and the door. Lint accumulated on the gasket and the door may be removed.

The laundry treatment apparatus may further include a water level sensor for detecting the water level of the tub. The water supply unit may supply water to the tub based on the water level of the tub detected by the water level sensor.

The driving unit may stop after rotating the drum at the first rotational speed.

When the drum rotates, the laundry in the drum can absorb water from the tub. The laundry may absorb the water in the tub to lower the water level of the tub.

The water level sensing unit may detect the water level of the tub in a state in which the drum is stopped. The water level sensor may detect the water level of the tub after the drum rotates at a first rotational speed and stops.

The water supply unit may re-supply water to the tub up to the first water level when the water level of the tub is lower than the first water level after the drum rotates at the first rotational speed. When the water level of the tub is lower than the first water level in a state in which the drum is stopped, the water supply unit may re-supply water to the tub. The water supply unit may re-supply water to the tub up to the first water level.

The driving unit may rotate the drum again at the first rotational speed after the water supply unit re-supplys water to the tub.

If the drum rotates after the re-watering, the laundry may not absorb more water. When the drum rotates at the first rotational speed after the re-watering, the water level of the tub may not decrease.

The water level of the tub in a section in which the drum rotates at the first rotation speed after re-watering may be higher than the water level in the tub in a section in which the drum rotates at the first rotation speed before the re-watering.

When the drum rotates at the first rotation speed after the re-watering, the water of the tub may flow on the inner surface of the gasket, and the water flowing on the inner surface of the gasket rotates the drum before the re-watering. You can reach a higher position than when delivering. The water flowing on the inner surface of the gasket may remove lint accumulated at a higher position than the lint removed before the re-watering. The water flowing through the inner surface of the gasket may remove lint accumulated in the door.

The driving unit may brake the drum after rotating the drum at the first rotational speed. The driving unit may brake the drum by reverse-phase braking.

A phase of the power applied to the driving unit in a section in which the drum is braked may be reversed from a phase of power applied to the driving unit in a section in which the drum rotates at the first rotational speed.

The driving unit, before rotating the drum at the first rotational speed, accelerates the drum to the first rotational speed, and the magnitude of the acceleration in a section in which the drum brakes, the drum rotates up to the first rotational speed It may be greater than the magnitude of the acceleration in the accelerating section.

The driving unit, in a state where the water level in the tub is the first water level, rotates the drum by a rotation angle within the range of 90 degrees to 180 degrees at the first rotation speed and then brakes the drum, rotation and braking can be repeated alternately.

When the drum is braked, the laundry in the drum may be separated from the drum and fall. As the laundry falls, water in the drum may splash on the gasket and the door. Lint accumulated on the gasket and the door may be removed by the water splashed as the laundry falls. The drum rotates at the second rotation speed so that lint accumulated at a higher position than the lint removed by the dropped laundry may be removed.

The laundry treatment apparatus further includes a circulation pump for pumping the water discharged from the tub, a nozzle provided on the gasket and having an outlet located in the laundry inlet passage, and a circulation passage connecting the circulation pump and the nozzle. can do.

The circulation pump may be driven when the driving unit rotates the drum.

When the circulation pump is driven, the circulation nozzle may spray water. The circulation nozzle may spray water to the inner surface of the gasket. The circulation nozzle may spray water to the inner surface of the door. The water sprayed from the circulation nozzle may remove lint accumulated in the gasket and the door.

The laundry treatment apparatus may further include a control unit for controlling the driving unit and the water supply unit. The control unit may control rotation of the driving unit. The control unit may control a rotation speed and a rotation direction of the driving unit.

The controller may control the water supply unit based on the water level of the tub detected by the water level sensor.

The water supply unit may include a water supply passage connecting the water supply source and the tub, and a water supply valve opening and closing the water supply passage.

The control unit may control the water supply valve. The water supply valve may be controlled based on the water level of the tub detected by the water level sensor.

The control unit may control the circulation pump. The control unit may drive the circulation pump when the driving unit is driven.

The controller may control the induction heater.

Various embodiments for solving the problems of the present disclosure control the motion of the drum, the water supply of wash water, and the supply of circulating water in the rinsing section during the washing cycle to maximize the water splashing effect of the wash water accommodated in the tub, so that the front of the tub An object of the present invention is to provide a laundry treatment apparatus capable of washing an inner surface of a door and an inner peripheral surface of a gasket by delivering wash water to the air conditioner, and a method for controlling the same.

In an exemplary embodiment of the present disclosure, in the rinsing section, wash water is supplied to the water level at which the lower part of the gasket is submerged, and then the drum is rotated to generate a water flow in which the wash water supplied into the tub flows, so that the inner surface of the door and the gasket are closed. An object of the present invention is to provide a laundry treatment apparatus capable of washing an inner surface of a door and an inner surface of a gasket by delivering washing water to the inner peripheral surface, and a method for controlling the same.

An exemplary embodiment of the present disclosure includes a cabinet having an inlet formed therein, a door opening and closing the inlet, a tub provided inside the cabinet for accommodating water, a drum rotatably provided in the tub to receive laundry, and the tub. A driving unit coupled to rotate the drum, a gasket connecting the inlet and the opening of the tub, a water supply unit communicating with the gasket to supply water to the tub through the gasket, and the gasket communicating with the tub to communicate with the tub In the control method of a clothes treatment apparatus including a circulation unit for supplying water discharged from After the first water supply step, a rotating step of rotating the drum at a first RPM and a second water supply step of supplying water to the tub to a second water level higher than the first water level through the water supply unit after the rotating step; After the accelerating step of accelerating the drum to a second RPM and after the accelerating step, the water supplied to the second water level by maintaining the rotation of the drum at the second RPM forms a water flow according to the rotation of the drum to form a water flow to the gasket An object of the present invention is to provide a method for controlling a laundry treatment apparatus, comprising: a lint removing step of removing lint accumulated on an inner circumferential surface of a door and an inner surface of a door; and a decelerating step of decelerating the rotation of the drum after the lint removing step.

The acceleration step, the lint removal step, and the deceleration step may be performed while the second water supply step is in progress, and the acceleration step may be performed when the water level in the tub reaches the second water level.

The method may further include a circulating water supply step of supplying water discharged from the tub to the gasket through the circulation unit to remove lint accumulated on an inner circumferential surface of the gasket and an inner surface of the door. is performed while accelerating the drum to a second RPM, and may be completed while decelerating the rotation of the drum.

The accelerating step, the lint removing step, the decelerating step, and the circulating water supply step may be performed at least once during a rinsing cycle of the laundry treatment apparatus.

The second RPM may be the same as the first RPM, or the second RPM may be greater than the first RPM.

Exemplary embodiments of the present disclosure include a cabinet that forms an exterior and includes an inlet, a door that opens and closes the inlet, a tub provided inside the cabinet and forms an opening communicating with the inlet, and rotatably inside the tub Induction installed and provided in the tub and a metal drum for accommodating laundry, a gasket connecting the inlet of the cabinet and the opening of the tub, and heating the circumferential surface of the drum through a magnetic field generated by applying a current a module and a driving unit coupled to the tub to rotate the drum; a water supply unit communicating with the gasket to supply water to the tub through the gasket; and a control unit for controlling the driving unit and the water supply unit, the control unit comprising: After water is supplied to the tub to a first water level for rinsing the laundry through the water supply unit, the drum is rotated at a first RPM, and then water is supplied through the water supply unit to a second water level higher than the first water level. The water supply unit rotates the drum at a second RPM to remove lint accumulated on the inner peripheral surface of the gasket and the inner surface of the door by rotating the drum at a second RPM to form a water flow according to the rotation of the drum. and controlling the driving unit.

The tub may further include a circulation unit forming a flow path for circulating water discharged from the tub, wherein the circulation unit may include a circulation flow path communicating the tub and the gasket and a circulation pump providing power to the circulation flow path have.

The control unit may control the circulation pump to supply water discharged from the tub to an inner circumferential surface of the gasket, and the control unit may operate the circulation pump while accelerating the drum to the second RPM to discharge the water from the tub. The circulation pump may be controlled so that the used water is supplied to the inner circumferential surface of the gasket.

And the controller may stop the operation of the circulation pump when the rotation of the drum decelerates at the second RPM.

The second RPM may be the same as the first RPM, or the second RPM may be set to be greater than the first RPM.

An exemplary embodiment of the present disclosure may form a water supply passage through the gasket. In addition, it is possible to form a circulating water supply passage through the tub, the circulation pump, and the gasket.

An exemplary embodiment of the present disclosure controls the motor to rotate at a first rotational speed of 1G or more, in which water is supplied to the first water level, which is the rinsing water level, through the water supply unit, and the laundry adheres to the inner wall by centrifugal force and rotates, and the circulation pump is operated. It can be driven to control the supply of washing water in the tub to the inside of the drum.

An exemplary embodiment of the present disclosure supplies water above the rinsing water level and controls the motor to rotate the drum at a second rotation speed greater than the first rotation speed, and drives the circulation pump to supply the washing water in the tub into the drum can be controlled to do so.

In an exemplary embodiment of the present disclosure, a water supply port is formed in the gasket so that water can be supplied through the gasket, and at least one water supply port formed in the gasket may be provided on the gasket.

In an exemplary embodiment of the present disclosure, when the drum is rotated in reverse in both directions, the drum is rotated by 1G or more to move the laundry in both directions along the inner wall of the drum, but reverse braking is performed to drop the laundry when located at the top of the drum Trigger, the drum can be controlled to rotate in the opposite direction again.

Each feature of the above-described embodiments may be implemented in combination in other embodiments as long as they are not contradictory or exclusive to other embodiments.

According to at least one of the embodiments of the present disclosure, lint accumulated in the gasket and the door may be removed.

In addition, lint accumulated in the gasket and the door can be removed without providing a duct for discharging air toward the gasket and the door.

In addition, since lint can be removed without a duct, the laundry can be dried by heating the drum instead of the hot air drying method.

In addition, since the duct may not be provided, it is possible to increase the degree of freedom in the installation position of the induction module.

In addition, it is possible to reduce power consumption during drying by providing an induction module.

In addition, it is possible to remove lint accumulated on the gasket and the door in the washing cycle and the rinsing cycle.

In addition, lint generated during the drying cycle of the laundry treatment device to which the induction module (IH module) is applied and accumulated in the inner surface of the door, the inner circumferential surface of the gasket, and the front of the tub forms a flow of wash water supplied to the inside of the tub during the washing cycle. can be removed

Also, after water is supplied so that a part of the inner circumferential surface of the gasket is submerged, a water flow is formed to remove lint accumulated in the lower part of the gasket and the lower part of the inner surface of the door.

In addition, after supplying washing water up to a set water level at which part of the inner circumferential surface of the gasket can be submerged, by controlling the motion of the drum at the set water level, water splashing occurs in the front of the tub, the central portion of the gasket, the upper part, and the door Lint accumulated on the central part and upper part of the inner surface can be removed.

In addition, by supplying water supply and circulation water to the front of the tub, it is possible to remove the traced lint on the inner surface of the door.

The effects of the present disclosure are not limited to those described above, and other effects not mentioned will be clearly recognized by those skilled in the art from the following description.

1 is a view showing an appearance of a clothes treatment apparatus according to an exemplary embodiment of the present disclosure.
FIG. 2 is a view showing an internal configuration of the laundry treatment apparatus of FIG. 1 .
3 is a view showing an induction module, a tub and a drum.
4 is a block diagram illustrating a configuration for controlling a laundry treatment apparatus according to an exemplary embodiment of the present disclosure.
5 is a diagram illustrating driving motions of a drum that can be implemented by the laundry treatment apparatus according to an embodiment of the present disclosure.
6 is a view illustrating a washing cycle applied to a laundry treatment apparatus according to an exemplary embodiment of the present disclosure.
7 is a view illustrating a part of a washing cycle applied to a laundry treatment apparatus according to an exemplary embodiment of the present disclosure.
8 is a view showing the relationship between water level, drum RPM, water supply and circulation during some of the washing cycles of the drum according to an embodiment of the present disclosure.
FIG. 9 is a view illustrating a cleaning portion of a gasket and a door during the operation of FIG. 8 .

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may unnecessarily obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in this specification is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present disclosure , should be understood to include equivalents or substitutes.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

Furthermore, although each drawing is described for convenience of description, it is also within the scope of the present invention that those skilled in the art implement other embodiments by combining at least two or more drawings.

FIG. 1 is a view showing an exterior of a clothes treating apparatus according to an exemplary embodiment of the present disclosure, and FIG. 2 is a view showing an internal configuration of the clothes treating apparatus of FIG. 1 .

When defining a direction to help understand the detailed structure of the laundry treatment apparatus according to an embodiment of the present disclosure, a direction toward the door 12 with respect to the center of the laundry treatment apparatus may be defined as a front. .

In addition, a direction opposite to the direction toward the door 12 may be defined as a rear direction, and a right and left direction may be defined depending on the front-rear direction defined above.

Hereinafter, it will be described with reference to FIGS. 1 and 2 .

The laundry treatment apparatus according to an embodiment of the present disclosure may be a washing machine, a dryer, a washing machine combined with drying, or an apparatus for refreshing clothes.

The laundry treatment apparatus may be a dryer that does not include the tub 2 . Alternatively, the laundry treatment apparatus may be a laundry washing machine including a tub 2 . Hereinafter, a washing machine combined with drying will be described as a representative example of the laundry treatment apparatus of the present disclosure. However, the laundry treatment apparatus of the present disclosure is not limited thereto.

A laundry treatment apparatus according to an embodiment of the present disclosure includes a cabinet 1 forming an exterior, a tub 2 provided inside the cabinet 1 , and a rotatable object provided inside the tub 2 . (For example, a laundry object, a drying object, or a refresh object) may include a drum 3 in which is accommodated.

For example, when clothes are washed with washing water, they can be called laundry objects, when wet clothes are dried using heat, they can be called drying objects, and dry clothes can be refreshed using hot air, cold air, or steam. In the case of (refresh), this can be called a refresh object. Accordingly, clothes can be washed, dried, or refreshed through the drum 3 of the clothes treatment apparatus.

The cabinet 1 may include an inlet provided at the front of the cabinet 1 through which an object enters and exits, and the cabinet 1 has a door rotatably connected to the cabinet 1 to open and close the inlet. (12) may be provided.

The door 12 may include a door frame 121 and a see-through window 122 provided in a central portion of the door frame 121 .

A control panel 5 may be provided on the upper front side of the laundry treatment apparatus. The control panel 5 may be provided for a user interface. Various user inputs may be performed through the control panel 5 , and input information or various information of the laundry treatment apparatus may be displayed. Accordingly, the control panel 5 may include a manipulation unit for a user to operate the laundry treatment apparatus and a display for displaying information to the user.

Meanwhile, the tub 2 forms a space in which water can be stored. The tub 2 may extend in a cylindrical shape. The tub 2 may have a longitudinal axis parallel to the lower surface of the cabinet 1 or may form a predetermined angle. An extension line of the longitudinal axis of the tub 2 may pass through the rear surface of the cabinet 1 . The tub 2 has an opening 21 communicating with the inlet. A tub opening 21 is provided in the front. The tub 2 may include the tub opening 21 and the tub body 22 constituting the body of the tub. Accordingly, the tub body 22 may be provided in a cylindrical shape, and the tub opening 21 may be provided to correspond to the shape of the tub body 22 .

The tub 2 may be fixed to the lower surface (bottom surface) of the cabinet 1 by a second support part 132 , and the second support part 132 includes a support bar 1321 and a damper 1322 . The vibration generated in the tub (2) by the rotation of the drum (3) can be attenuated.

In addition, the first support 131 fixed to the upper surface of the cabinet 1 may be connected to the upper surface of the tub 2 . Vibration generated in the tub 2 and transmitted to the cabinet 1 may be attenuated through the first support part 131 .

That is, the tub 2 can be supported inside the cabinet 1 through the first support part 131 and the second support part 132 , and vibration generated from the tub 2 can be damped. can

The drum 3 may include a body extending in a cylindrical shape. The drum 3 may be made of a conductor. The body of the drum 3 may be made of a conductor. The body of the drum 3 may be made of metal. A plurality of through holes 33 may be formed in the drum 3 .

The drum 3 may provide a space for storing objects (laundry, drying objects, and refresh objects). The drum 3 may extend in a cylindrical shape. The drum 3 may have a longitudinal axis parallel to the lower surface (bottom surface) of the cabinet 1 or may form a predetermined angle. An extension of the longitudinal axis of the drum 3 may pass through the rear surface of the cabinet 1 . A drum opening 31 communicating with the tub opening 21 may be provided at the front of the drum 3 . An angle between the central axis of the tub 2 and the drum 3 with respect to the bottom surface may be the same.

A plurality of through holes 33 penetrating the drum 3 may be formed on the outer peripheral surface of the drum 3 . Through the through hole 33, air and wash water may be introduced between the inside of the drum 3 and the inside of the tub 2 .

A lifter 35 may be provided on the inner circumferential surface of the drum 3 to agitate the object when the drum 3 rotates. The lifters 35 may extend along the longitudinal direction of the drum 3 from the inner circumferential surface of the drum 3 and may be provided in plurality on the inner circumferential surface of the drum 3 .

The drum 3 may be rotated by a driving unit 6 provided at the rear of the tub 2 .

The driving unit 6 includes a stator 61 fixed to the rear surface of the tub 2, a rotor 63 rotating by an electromagnetic action with the stator, and a drum 3 and a rotor ( 63) may be provided as a rotating shaft 65 for connecting them.

The stator 61 may be fixed to the rear surface of the bearing housing 66 provided on the rear surface of the tub 2 , and the rotor 63 may have a rotor magnet 632 provided on the radially outer side of the stator 61 . ) and a rotor housing 631 connecting the rotor magnet 632 and the rotation shaft 65 .

A plurality of bearings 68 supporting the rotation shaft 65 may be provided inside the bearing housing 66 .

In addition, a spider 67 that easily transmits the rotational force of the rotor 63 to the drum 3 may be provided on the rear surface of the drum 3 , and the spider 67 receives the rotational power of the rotor 63 . The rotation shaft 65 for transmission may be fixed.

Meanwhile, a detergent box 7 may be provided on the upper front side of the laundry treatment apparatus. Detergent, fabric softener, etc. can be supplied through the detergent box 7 . The detergent box 7 may be provided with a handle so that a user can slide it toward the front of the cabinet 1 to enable opening and closing.

More specifically, the detergent box 7 may be provided to include a case 71 provided inside the cabinet 1 and a drawer 72 withdrawable from the case 71 .

The drawer 72 accommodated in the case 71 may be drawn out of the cabinet 1 through a drawer outlet provided to penetrate the front surface of the cabinet 1 . The drawer 72 may be provided as a polyhedron (such as a hexahedron) with an open upper surface, and a storage unit 721 providing a space for storing detergent in the drawer 72, the storage unit ( 721) may be provided to include a detergent outlet 723 that communicates with the case 71. The detergent outlet 723 may be provided as a through hole penetrating the rear surface or the bottom surface of the storage unit 721, and may be provided as a bell trap provided on the bottom surface of the storage unit 721. may be

The water supply units 51 and 53 may be connected to a water supply source to supply water to the tub 2 . The water supply source may be a water source outside the cabinet, such as a water supply. The water supply units 51 and 53 include a water supply passage 51 for supplying water from a water supply source to the storage unit 721 , and a water supply valve that opens or closes the water supply passage 51 according to a control signal from the control unit 10 . (51a) may be included. Water supply (51, 53)

Therefore, when water is supplied to the storage unit 721 in which the detergent is stored through the water supply passage 51, the detergent in the storage unit 721 moves to the case 71 through the detergent outlet 723 together with the water. . A liquid in which the detergent and water are mixed may be referred to as detergent water.

Meanwhile, the detergent may not be accommodated in the storage 721 . In this case, the water supplied to the storage unit 721 may move to the case 71 through the outlet 723 .

The water supply units 51 and 53 may include a supply pipe 53 connecting the detergent box 7 and the tub 2 . The supply pipe 53 may be connected to the case 71 . The supply pipe 53 may be connected to the upper portion of the tub 2 .

Detergent water or water of the case 71 may be supplied to the tub 2 through the supply pipe 53 .

The water supplied to the tub (2) is discharged to the outside of the cabinet (1) through the drain (14). The drain unit 6 includes a drain pipe 142 that forms a drain passage through which the water inside the tub 2 moves, and the water supplied into the tub is drained to the outside of the cabinet 1 through the drain pipe 142 . A drain pump 141 for generating a pressure difference inside the drain pipe 142 may be provided.

In more detail, the drain pipe 142 includes a first drain pipe 1421 connecting the lower surface of the tub 2 and the drain pump 141 and one end of the drain pipe 141 connected to the drain pump 141 of the cabinet 1 . A second drain pipe 1422 that forms a flow path through which water moves to the outside may be included.

Furthermore, the laundry treatment apparatus according to an embodiment of the present disclosure further includes a water level detecting unit 110 for detecting a water level inside the tub body 22 . The water level detection unit 110 may be configured to include a communication pipe 111 having the same water level as the water level inside the tub body 21 and a sensor 113 for detecting a pressure change inside the communication pipe 111. have.

One end of the communication pipe 111 is connected to the first drain pipe 1421 , and the other end is provided to be positioned at a point higher than the rotation center of the drum 3 . Accordingly, when all the water inside the tub body 22 has moved to the first drain pipe 1421 , the water level sensor 110 may also detect the water level in the first drain pipe 1421 .

The laundry treatment apparatus according to an embodiment of the present disclosure may include a gasket 4 . The gasket 4 may connect the inlet 11 of the cabinet 1 and the tub opening 21 . The gasket 4 may form a passage for loading and unloading laundry.

The gasket 4 may have an elongated tubular shape. One end of the gasket 4 may be coupled to the tub opening 21 . The other end of the gasket 4 may be coupled to the inlet 11 of the cabinet 1 . The gasket 4 may extend from the tub opening 21 to the inlet 11 of the cabinet 1 .

The gasket 4 may prevent the vibration of the tub 2 from being transmitted to the cabinet 1 . The gasket 4 may be formed of a flexible material. For example, the gasket 4 may be made of a material such as rubber, Ethylene Propylene Diene Monomer (EPDM), or Thermo Plastic Elastomer (TPE). However, the present invention is not limited thereto.

The gasket 4 may seal between the cabinet 1 and the tub 2 . That is, the gasket 4 may prevent water inside the tub 2 from leaking into the space between the tub 2 and the cabinet 1 .

Meanwhile, the laundry treatment apparatus according to an embodiment of the present disclosure may include circulation units 55 and 57 for recirculating the water drained from the tub 2 . The circulation units 55 and 57 include a circulation pump 55 for pumping the water discharged from the tub 2 , and a nozzle 57a for spraying the pumped water into the tub 2 or the drum 3 , and , it may include a circulation passage 57 connecting the circulation pump 55 and the nozzle 57a.

The circulation pump 55 may communicate with the inside of the tub 2 through the bottom surface of the tub 2 . A flow path connecting the circulation pump 55 and the tub 2 may be connected to an inlet of the circulation pump 55 . The circulation pump 55 may be connected to the first drain pipe 1421 described above. Alternatively, it may be connected to the bottom surface of the tub 2 through a separate flow path from the first drain pipe 1421 .

The circulation pump 55 may be provided separately from the aforementioned drain pump 141 . Alternatively, the circulation pump 55 and the drain pump 141 may be provided in one housing. Alternatively, a single pump may serve as a circulation pump and a drain pump.

The circulation passage 57 may connect the circulation pump 55 and the nozzle 57a.

The circulation passage 57 may be connected to the circulation pump 55 . The circulation passage 57 may be connected to the outlet of the circulation pump 55 .

The circulation passage 57 may be connected to the nozzle 57a. The circulation passage 57 may communicate with the nozzle 57a. The circulation passage 57 may be connected to the gasket 4 . The circulation passage 57 may be connected to the nozzle 57a provided in the gasket 4 .

The circulation passage 57 may guide the water pumped by the circulation pump 55 to the nozzle 57a. The circulation passage 57 may supply water pumped by the circulation pump 55 to the nozzle 57a.

The nozzle 57a may be provided in the gasket 4 . The nozzle 57a may be integrally formed with the gasket 4 or manufactured separately from the gasket 4 to be coupled to the gasket 4 .

The nozzle 57a may pass through the gasket 4 . The outlet of the nozzle 57a may be located inside the gasket 4 . The inlet of the nozzle 57a may be located outside the gasket 4 . The nozzle 57a may be connected to the circulation passage 57 from the outside of the gasket 4 .

The nozzle 57a may communicate with the space surrounded by the inner circumferential surface of the gasket 4 . That is, the nozzle 57a may communicate with the laundry access passage described above. The nozzle 57a may communicate with the inner space of the tub 2 and the inner space of the drum 3 through the laundry access passage.

The nozzle 57a may spray water pumped by the circulation pump 55 and introduced along the circulation passage 57a. The nozzle 57a may spray water to the inner surface of the gasket 4 . The nozzle 57a may spray water on the inner surface 122 of the door 12 . The nozzle 57a may spray water into the drum 3 .

The nozzle 57a may be located above the center of the gasket 4 .

A plurality of nozzles 57a may be provided. A plurality of nozzles may be arranged along the circumferential direction of the gasket 4 . The plurality of nozzles may include a nozzle 57a positioned above the center of the gasket 4 . The plurality of nozzles may include nozzles positioned below the center of the gasket 4 .

Meanwhile, the laundry treatment apparatus according to an embodiment of the present disclosure may further include a direct water nozzle connected to an external water source in addition to the nozzle 57a connected to the circulation pump 55 . The water supply units 51 and 53 may further include a separate nozzle water supply passage in addition to the water supply passage 51 , and the nozzle water supply passage may be connected to an external water source and be interrupted by a valve. In addition, a direct water nozzle connected to the nozzle water supply passage may be further provided in the gasket 4 .

As water supplied through the nozzle 57a or the direct water nozzle flows along the inner surface of the door 12 , lint attached to the inner surface of the door 12 may be removed. In addition, water supplied through the nozzle 57a may flow along the inner circumferential surface of the gasket 4 , and lint accumulated on the inner circumferential surface of the gasket 4 may be removed.

In addition, lint attached to the gasket 4 and the inner surface 122 of the door can be removed by supplying water to the inner surface 122 of the tub 2 and the gasket 4 and the door through RPM control of the drum 3 . and this will be described later.

The laundry treatment apparatus according to an embodiment of the present disclosure may include an induction module 8 for heating the drum 3 . The induction module 8 comprises a coil. When power is applied to the induction module 8, a magnetic field is generated by the coil. The induction module 8 can heat the drum 3 through the generated magnetic field.

The induction module 8 may heat the drum 3 to heat the wash water in the tub 2 and the laundry in the drum 3 . The laundry treatment apparatus of the present disclosure may improve washing performance by increasing the temperature of washing water and laundry.

In addition, the induction module 8 can dry the laundry by heating the drum 3 .

3 is a view showing an induction module, a tub and a drum.

Hereinafter, the induction module 8 and a structure for mounting the induction module 8 to the laundry treatment apparatus will be described with reference to FIG. 3 .

The induction module 8 is mounted on the circumferential surface of the tub 2 to heat the circumferential surface of the drum 3 through a magnetic field generated when a current is applied to a coil wound with a wire.

In more detail, when an alternating current of which the phase of the current is changed flows through the coil, the coil forms a radial alternating magnetic field according to the Ampere circuit law. Then, when the alternating magnetic field is concentrated toward the drum 3 made of a conductor having high magnetic permeability, an eddy current is formed in the drum 3 according to Faraday's law of induction.

Accordingly, the eddy current flowing through the drum 3 is converted into Joule heat by the resistance of the drum 3 itself, so that the inner peripheral surface of the drum 3 is directly heated.

In order to fix the coil to the upper surface of the tub 2 , the laundry treatment apparatus according to an embodiment of the present disclosure may further include a base housing 82 . The base housing 82 is fixed to the circumferential surface of the tub 2 , passes through the rotation shaft 65 and may be provided above a horizontal surface parallel to the ground.

More specifically, the base housing 82 may be provided in a rectangular plate shape or a rectangular shape having a predetermined thickness, the front and rear lengths are shorter than the front and rear lengths of the tub 2 , and are provided on the upper side of the drum 3 . It may include a positioned base body 821 .

The base body 821 may be formed to have the same curvature as the outer peripheral surface of the tub 2 or the drum 3 in order to concentrate the magnetic field generated from the coil to the drum 3 .

In addition, the base housing 82 may further include a fixing rib 823 protruding upward from the upper surface of the base body 821 to wind a coil, and the fixing rib 823 is a wire forming a coil. forms a coil slot into which it is inserted. That is, the coil in the coil slot may be fixed to the base housing 82 by an interference fit method.

The induction module 8 may further include a permanent magnet 83 provided above the base housing 82 and serving as a bar magnet to concentrate the magnetic field generated in the coil toward the drum 3 .

A plurality of permanent magnets 83 may be provided so as to be spaced apart from each other along the longitudinal direction of the coil, and located above the coil fixed to the base housing 82, disposed perpendicular to the longitudinal direction of the wire forming the coil. It is preferable to be This is to cover both the inner coil and the outer coil at the same time.

In order to fix the permanent magnet 83 to the base housing 82 , the induction module 8 may further include a permanent magnet housing 84 coupled to an upper side of the base housing 82 .

The permanent magnet housing 84 is provided in the permanent magnet housing body 841 and the permanent magnet housing body 841 having a shape corresponding to the base body 821 in a rectangular plate shape or a rectangle having a predetermined thickness. It may further include a plurality of permanent magnet mounting parts 842 and an air flow hole 841b provided to pass through the permanent magnet housing body 841 and located between the plurality of permanent magnet mounting parts 842 .

The permanent magnet mounting part 842 is provided so that the permanent magnet 83 is inserted from the upper side to the lower side, and may be formed to support the lower part of the permanent magnet 83 . Accordingly, in order to prevent the permanent magnet 83 from being separated upward from the permanent magnet mounting part 842, the induction module 8 of the present disclosure further includes a cover 85 coupled to the permanent magnet housing 84. can do.

The cover 85 includes a cover body 851 having a rectangular plate shape or a rectangular shape having a predetermined thickness, and an air discharge hole provided at the center of the cover body 851 to discharge hot air (air) by convection. (851a).

The reason for separating the permanent magnet housing 84 and the cover 85 is that air flows over the upper surface of the permanent magnet 83 to accelerate cooling of the permanent magnet 83, and the permanent magnet 83 is easily inserted and detached. This is to facilitate the exchange of the permanent magnet 83 and to facilitate injection by preventing the part fixing the permanent magnet 83 from having a closed surface.

Hereinafter, a structure for fixing the base housing 82 , the permanent magnet housing 84 , and the cover 85 to the tub 2 will be described. As described above, the induction module 8 of the present disclosure is a configuration for inductively heating the drum 3 and should be provided to be spaced apart from the outer peripheral surface of the drum 3 by a predetermined distance. Therefore, the induction module 8 of this embodiment may be fixed to the tub (2).

First, the base housing 82 may include a first fastening part 829 provided at a corner of the base body 821 and having a first fastening hole 829a into which a screw is inserted. The first fastening part 829 may be provided to protrude from both sides of the front end and the rear end of the base body 821 , respectively.

A plurality of housing fixing parts 22 having a hollow communicating with the first fastening hole 829a may be provided in the tub 2 .

In addition, the permanent magnet housing 84 is also provided at the edge of the permanent magnet housing body 841, the first fastening hole 829a communicates with the second fastening hole 849a into which a screw is inserted. 3 fastening parts 849 may be provided. The third fastening part 849 may be provided to protrude from both sides of the front end and the rear end of the permanent magnet housing body 841 , respectively.

In addition, the cover 85 has a third fastening part 859 protruding from the front and rear ends of the cover body 851 and having a third fastening hole 859a communicating with the second fastening hole 849a. can be

Accordingly, one screw passes through the third fastening hole 859a - the second fastening hole 849a - the first fastening hole 829a to be finally fixed to the housing fixing part 22 .

However, the third fastening part 859 is provided at the front and rear ends of the cover body 851 , and may be provided only on the left or right side, and on the lower surface of the cover body 851 is a permanent magnet housing body 841 . An insertion hook (not shown) inserted into the formed hook fastening hole 841a may be provided.

On the other hand, when the drum 3 rotates during washing, drying or refreshing, vibration is transmitted to the tub 2 , and the structures mounted on the tub 2 also vibrate, so the parts mounted on the tub 2 . damage may occur.

To solve this, a weight balancer 15 for damping vibration generated by the drum 3 may be provided on the outside of the gasket 4 and on the front surface of the tub 2 , and the weight balancer 15 ) may include a first balancer 151 and a second balancer 152 respectively provided on both sides with respect to the center of the left and right width direction of the tub 2 .

Vibration of the drum transmitted to the tub and the cabinet can be attenuated by the above-described balancer structure, and thus the problem of the induction module being detached from the tub or the coil accommodated in the induction module being detached can be prevented.

4 is a block diagram illustrating a configuration for controlling the laundry treatment apparatus according to an exemplary embodiment of the present disclosure. Hereinafter, it will be described with reference to FIG. 4 .

The control unit 10 is provided on the control panel 5 and the like, and the user receives a command to operate the laundry treatment apparatus through a manipulation unit provided on the control panel 5 to perform the various washing operations and options described above. can be

That is, the control unit 10 uses the water level information sensed by the water level sensor 110 while performing the determined washing cycle and options, the water supply valve 51a, the drain pump 141, the circulation pump 55, and the driving unit ( 6) can be provided to control. In addition, the control panel 5 may include a display unit, and may provide the user with various courses and current states of the above-described laundry treatment apparatus.

According to the control configuration, when clothes are put into the drum 3 and an operation command of the clothes treatment apparatus is input to the operation unit, the control unit 10 supplies water to the tub 20 and then drives the driving unit 6 . Thus, the drum 3 may be stirred from side to side or rotated in one direction to perform a washing cycle, a rinsing cycle, and a dehydration cycle.

5 is a view showing driving motions of a drum that can be implemented by the laundry treatment apparatus according to an embodiment of the present disclosure, and FIG. 6 is a view showing a washing operation applied to the laundry treatment apparatus according to an exemplary embodiment of the present disclosure. .

Hereinafter, it will be described with reference to FIGS. 5 and 6 .

The driving motion of the drum means a combination of the rotational direction and the rotational speed of the drum 3 , and the laundry accommodated in the drum 3 by the driving motion of the drum changes the falling direction or the falling time, and as a result, the drum (3) The flow of laundry accommodated inside is changed. The driving motion of the drum is implemented by controlling the driving unit 6 by the control unit 10 .

Since the laundry is raised by the lifter 35 provided on the inner peripheral surface of the drum 3 when the drum 3 rotates, the impact applied to the laundry can be varied by controlling the rotation speed and direction of the drum 3 do.

That is, it is possible to vary the mechanical force such as friction between laundry, friction between laundry and washing water, and the impact of falling of laundry. In other words, the degree of tapping or rubbing the laundry for washing can be varied, and the degree of dispersing or turning over the laundry can be varied.

On the other hand, in order to implement these various drum driving motions, the driving unit 6 is preferably a direct motor. That is, it is preferable that the stator of the motor is fixed to the rear of the tub 2 , and the driving shaft rotated together with the rotor of the motor directly drives the drum 3 . This is because, by controlling the rotation direction and torque of the motor, the driving motion of the drum can be immediately controlled by maximally preventing a time delay or backlash.

On the other hand, in the form of transmitting the rotational force of the motor to the rotating shaft through a pulley, etc., a drum driving motion of a type that allows a time delay or backlash, for example, a tumbling driving or a spin driving is possible, but various other drum driving motions It is not suitable for implementing Since the driving method of the washing motor and the drum 3 is obvious to those skilled in the art, a detailed description thereof will be omitted.

Figure 5 (a) is a view showing a rolling motion (rolling motion). In the rolling motion, the driving unit 6 rotates the drum 3 in one direction (preferably, one or more rotations), and the laundry on the inner circumferential surface of the drum 3 is less than about 90 degrees in the rotational direction of the drum 3 It is a motion controlled to fall toward the lowest point of the drum 3 at

For example, when the driving unit 6 rotates the drum 3 at about 40 RPM, the laundry located at the lowest point of the drum 3 rises to a predetermined height along the rotation direction of the drum 3 and then at the lowest point of the drum 3 . It flows toward the lowest point of the drum 3 as if it rolls at a position less than about 90 degrees from the rotation direction. Visually, when the drum 3 rotates clockwise, the laundry continuously rolls in the third quadrant of the drum 3 .

In the rolling motion, laundry is washed through friction with washing water, friction between laundry, and friction with the inner peripheral surface of the drum 3 . At this time, the laundry is turned over sufficiently to obtain the effect of gently rubbing the laundry.

Here, the rotational speed (rpm) of the drum 3 is determined in relation to the radius of the drum 3 . As the rotational speed of the drum 3 increases, the centrifugal force acting on the laundry in the drum 3 also increases. The flow of laundry in the drum 3 is changed due to the difference in size between the centrifugal force and gravity.

Of course, the rotational force of the drum 3 and the frictional force between the drum 3 and the laundry must also be considered. As such, when considering various forces acting on the laundry, the rotational speed of the drum 3 in the rolling motion is determined in a range in which the sum of the centrifugal force and the frictional force is smaller than the gravity (1G).

Figure 5 (b) is a view showing a tumbling motion (tumbling motion). In the tumbling motion, the driving unit 6 rotates the drum 3 in one direction (preferably, one or more rotations), but the laundry on the inner circumferential surface of the drum 3 rotates about 90 degrees to 110 degrees in the direction of rotation of the drum 3 It is a motion controlled to fall from position to the lowest point of the drum 3 .

In general, the tumbling motion is a drum driving motion used for washing and rinsing because mechanical force is generated only by controlling the drum 3 to rotate in one direction at an appropriate rotation speed.

That is, the laundry put into the drum 3 is positioned at the lowest point of the drum 3 before the driving unit 6 is driven. When the driving unit 6 provides torque to the drum 3, the drum 3 rotates, and the lifter 35 provided on the inner circumferential surface of the drum 3 or the frictional force between the drum 3 and the inner circumferential surface of the drum 3 causes the laundry to move to the drum. (3) It rises from my lowest point to a predetermined height. For example, when the driving unit 6 rotates the drum 3 at about 46 rpm, the laundry falls from the lowest point of the drum 3 toward the lowest point of the drum 3 at a position of about 90 to 110 degrees in the rotational direction. .

The rotational speed of the drum 3 in the tumbling motion may be determined in a range in which centrifugal force is generated larger than in the case of rolling motion, but is generated less than gravity.

Visually, the tumbling motion is, when the drum 3 rotates clockwise, the laundry rises from the lowest point of the drum 3 to the 90 degree position or the second quadrant, and then is separated from the inner peripheral surface of the drum 3 and is the lowest point of the drum 3 in the form of falling towards

Accordingly, during the tumbling motion, laundry is washed by friction with wash water and impact force caused by falling, and in particular, it is washed by a greater mechanical force than in the case of the rolling motion.

Figure 5 (c) is a view showing a step motion (step motion). In the step motion, the driving unit 6 rotates the drum 3 in one direction (preferably, less than one rotation), but the laundry on the inner circumferential surface of the drum 3 moves near the highest point of the drum 3 (preferably, the drum (3) is about 146 to 161 degrees in the rotational direction, but it is not necessarily limited thereto, and an angular position greater than 161 degrees is possible within a range not exceeding 180 degrees.) at the lowest point of the drum (3) It is a controlled motion to fall towards.

That is, the step motion is the speed at which laundry does not fall from the inner circumferential surface of the drum 3 due to centrifugal force (that is, the speed at which laundry is rotated together with the drum 3 while being adhered to the inner circumferential surface of the drum 3 due to centrifugal force) This is a motion that maximizes the impact force on the laundry by rapidly braking the drum 3 after rotating the furnace drum 3 .

For example, when the driving unit 6 rotates the drum 3 at about 60 rpm or more, the laundry rotates without falling by centrifugal force (that is, the drum 3 and the drum 3 in a state attached to the inner circumferential surface of the drum 3) rotate together), and in this process, when the laundry is located near the highest point (180 degrees in the rotational direction) of the drum 3, the torque in the opposite direction to the rotational direction of the drum 3 is applied to the driving unit 6 can be controlled to be applied to

After the laundry rises from the lowest point of the drum 3 in the direction of rotation of the drum, the drum 3 stops and falls to the lowest point of the drum 3, so that the laundry has a maximum fall, and thus the impact force acting on the laundry is also maximized. Mechanical force (eg, impact force) generated by such a step motion is greater than the aforementioned rolling motion or tumbling motion.

Visually, the step motion is, when the drum 3 rotates clockwise, the laundry located at the lowest point of the drum 3 moves to the highest point (180 degrees) of the drum 3 through the third and second quadrants and then suddenly the drum It is separated from the inner peripheral surface of (3) and falls toward the lowest point of the drum (3). Therefore, the step motion provides the greatest mechanical force as the laundry has the largest drop and the smaller the laundry amount is.

On the other hand, as a control method of the driving unit 6 for braking the drum 3, reverse-phase braking is preferable. Reverse phase braking is a method of braking by generating a rotational force in a direction opposite to the direction in which the driving unit 6 is rotating. In order to induce a rotational force opposite to the direction in which the driving unit 6 is rotating, the phase of the power supplied to the driving unit 6 may be reversed, enabling sudden braking in this way. Therefore, reverse-phase braking is suitable for step motion.

After the driving unit 6 is braked, the driving unit 6 again applies torque to the drum 3 to raise the laundry at the lowest point of the drum 3 to the highest point. That is, after applying a torque to rotate in the forward direction, a torque is applied to instantaneously rotate in the reverse direction to make a sudden stop, and then, by applying a torque to rotate in the forward direction again, step motion is implemented.

Therefore, in the step motion, when the drum 3 rotates, the washing water introduced through the through hole 33 formed in the drum 3 rubs against the laundry to wash, and when the laundry is located at the highest point of the drum 3, it is dropped. It can be said that it is a motion of washing by impact force.

Figure 5 (d) is a view showing a swing motion (swing motion). In the swing motion, the driving unit 6 rotates the drum 3 in both directions, but at a position less than about 90 degrees in the rotational direction of the drum 3 (preferably, about 30 to 45 in the rotational direction of the drum 3 ). degree position, but it is not necessarily limited thereto, and an angular position greater than 45 degrees is possible within a range not exceeding 90 degrees.) It is a motion controlled so that laundry falls. For example, when the driving unit 6 rotates the drum 3 counterclockwise at about 40 rpm, the laundry located at the lowest point of the drum 3 rises to a predetermined height in the counterclockwise direction. At this time, the driving unit 6 stops the rotation of the drum 3 before the laundry reaches the position of about 90 degrees in the counterclockwise direction, so that the laundry moves the drum 3 at the position of less than about 90 degrees in the counterclockwise direction. moves towards the lowest point.

After the drum 3 stops rotating in this way, the driving unit 6 rotates the drum 3 clockwise at about 40 RPM this time so that the laundry follows the rotation direction of the drum 3 (ie, clockwise). to rise to a certain height. And, before the laundry reaches the position of about 90 degrees in the clockwise direction, the driving unit 6 is controlled so that the rotation of the drum 3 is stopped, so that the laundry moves in the clockwise direction of the drum 3 at a position of less than about 90 degrees. falling towards the lowest point.

That is, the swing motion is a motion in which the forward rotation/stop of the drum 3 and the reverse rotation/stop of the drum 3 are repeated. After ascending to the quadrant, it falls gently, passes through the fourth quadrant of the drum 3 again, rises to the first quadrant, and then gently falls. That is, visually, the swing motion becomes a form in which laundry flows in a figure 8 shape lying on its side across the third and fourth quadrants of the drum 3 .

In this case, power generation braking is suitable for braking of the driving unit 6 . The power generation braking minimizes the load generated on the driving unit 6 , minimizes mechanical wear of the driving unit 6 , and at the same time makes it possible to control the impact applied to the laundry.

Power generation braking is a braking method using that the driving unit 6 acts as a generator due to rotational inertia when the current applied to the driving unit 6 is turned off. When the current applied to the driving unit 6 is turned off, the direction of the current flowing in the coil of the driving unit 6 is opposite to the direction of the current before the power is turned off, so a force (Fleming's right hand) law), the driving unit 6 is braked. Unlike reverse-phase braking, power generation braking does not brake the driving unit 6 abruptly, and allows the rotation direction of the drum 3 to be smoothly switched.

Figure 5 (e) is a view showing a scrub motion (scrub motion). The scrub motion is a motion in which the driving unit 6 rotates the drum 3 alternately in both directions, and the laundry is controlled so that the laundry falls at a position of about 90 degrees or more in the rotational direction of the drum 3 .

For example, when the driving unit 6 rotates the drum 3 in the forward direction at about 60 rpm or more, the laundry positioned at the lowest point of the drum 3 rises to a predetermined height in the forward direction. At this time, the driving unit 6 moves the laundry in the forward direction at a set angle of about 90 degrees or more (preferably, 139 to 150 degrees, but not necessarily limited thereto, and 150 degrees or more is possible.) A reverse torque is provided to (3) to temporarily stop the rotation of the drum (3). Then, the laundry on the inner peripheral surface of the drum 3 falls rapidly.

Thereafter, the driving unit 6 rotates the drum 3 in the reverse direction at about 60 rpm or more to raise the dropped laundry to a predetermined height of 90 degrees or more in the reverse direction. When the laundry reaches a set angle of 90 degrees or more in the reverse direction (for example, a position corresponding to 139 to 150 degrees), the driving unit 6 provides a reverse torque to the drum 3 again to temporarily stop the rotation of the drum 3 At this time, the laundry on the inner peripheral surface of the drum 3 falls toward the lowest point of the drum 3 at a position of 90 degrees or more in the reverse direction.

The scrub motion washes the laundry by causing the laundry to fall rapidly from a predetermined height. At this time, it is preferable that the driving unit 6 is reverse-phased for braking the drum 3 .

Since the rotational direction of the drum 3 is rapidly changed, the laundry does not deviate significantly from the inner circumferential surface of the drum 3, so that a very powerful rubbing effect can be obtained.

In the scrub motion, laundry that has moved forward through the third quadrant to the second quadrant falls rapidly, and in the reverse direction passes through the fourth quadrant and moves to a part of the first quadrant, and then falls repeatedly. Therefore, visually, it can be said that the laundry rises and then descends along the inner circumferential surface of the drum 3 repeatedly.

5(f) is a view showing a filtration motion. The filtration motion is a motion in which the driving unit 6 rotates the drum 3 so that the laundry does not fall off the inner circumferential surface of the drum 3 by centrifugal force, and in this process, the washing water is sprayed into the drum 3 through the nozzle. am.

After the laundry is unfolded, the wash water is sprayed into the drum 3 while it is in close contact with the inner circumferential surface of the drum 3 and rotates. 33) and exits to the tub (2).

By the filtration motion, while the surface area of the laundry is increased, since the washing water permeates the laundry, there is an effect that the laundry is evenly wetted.

Figure 5 (g) is a view showing a squeeze motion (squeeze motion). In the squeeze motion, the driving unit 6 rotates the drum 3 so that the laundry does not fall off the inner circumferential surface of the drum 3 by centrifugal force, and then lowers the rotation speed of the drum 3 to separate the laundry from the inner circumferential surface of the drum 3 This is a motion of repeating the operation to be performed, and spraying wash water into the drum 3 through the nozzle during the rotation of the drum 3 .

In the filtration motion, the laundry continues to rotate at a speed that does not fall off the inner circumferential surface of the drum 3, but the squeeze motion changes the rotation speed of the drum 3 to repeat the adhesion and separation of the laundry to the inner circumferential surface of the drum 3 There is a difference in

The step motion and scrub motion have excellent washing power, so they are suitable for a case where the laundry is heavily contaminated and for a washing course to shorten the washing time. Also, step motion and scrub motion are motions with high levels of vibration and noise. Therefore, it is an undesirable motion when the laundry is sensitive clothing or in a laundry course in which noise and vibration need to be minimized.

Rolling motion is characterized by excellent cleaning power, low vibration level, minimal damage to laundry, and low motor load. Therefore, it is applicable to all washing courses, but in particular, it is a motion suitable for dissolving detergent and wetting laundry at the initial stage of washing. However, compared to the tumbling motion, the rolling motion has a lower vibration level, but when washing to the same level, washing time takes longer.

In the tumbling motion, the cleaning power is lower than that of the scrub motion, but the vibration level is intermediate between the scrub motion and the rolling motion. The tumbling motion can be applied to all washing courses.

In the squeeze motion, the squeezing force is similar to the tumbling motion, and the vibration level is higher than that of the tumbling motion. The squeeze motion is useful in the rinsing step because the washing water passes through the laundry and is discharged to the outside of the drum 3 in the process of repeating adhesion and separation of the laundry to the inner circumferential surface of the drum 3 .

Swing motion is the motion with the lowest vibration level and cleaning power. Therefore, the swing motion is a motion useful for a low-noise or low-vibration washing course, and is a motion suitable for sensitive laundry (gentle care).

Meanwhile, referring to FIG. 6 , looking at the entire washing sequence applied to the laundry treatment apparatus according to an embodiment of the present disclosure, the laundry treatment apparatus of this embodiment includes a water supply/soak step (S10), a washing step (S20), and spin-drying. It may be configured to sequentially perform a cycle (S30), a rinsing cycle (S40), a dehydration cycle (S50), and a drying cycle (S60).

Prior to the washing operation (S20), the cloth wetting (S10) may be made. The cloth wetting (S10) is a process of wetting laundry prior to washing. Water is supplied to the tub (2), and the drum (3) is rotated to perform wetting (S10). Also, the circulation units 55 and 57 may be driven.

The washing cycle ( S20 ) is a cycle of removing contamination from laundry by rotating the drum 3 according to a preset algorithm, and the above-described rolling motion and tumbling motion may be performed.

The rinsing process (S40) is a process for removing the detergent adhered to the fabric, and water is supplied, and a rolling motion and a tumbling motion may be performed, and then, a dehydration process may be performed again. In addition, in the rinsing cycle of the present embodiment, the above-described filtration motion may be performed to remove lint attached to the inner circumferential surface of the gasket and the inner circumferential surface of the door, which will be described later.

Briefly, if the filtration motion is performed to remove lint in the rinsing cycle of this embodiment, the water received in the tub through the filtration motion in the rinsing cycle changes the water level according to the rotation of the drum or the tub in the drum. It varies and forms a water flow, so that water is supplied to the inner circumferential surface of the gasket or the inner surface of the door to remove lint. More details on this will be described later.

The dewatering process (S30, S50) is a process of draining water and removing water from the fabric while rotating the drum 3 at high speed. The dehydration operation (S50) may be performed after the rinsing operation (S40). In addition, the dehydration cycle ( S30 ) may also be performed between the washing cycle ( S20 ) and the rinsing cycle ( S40 ). The dehydration cycle (S30) performed between the washing cycle (S20) and the rinsing cycle (S40) may be referred to as a simple dehydration cycle (S30) to distinguish it from the dehydration cycle (S50) performed after the rinsing cycle (S40).

The drying process (S60) is a process of drying laundry by applying heat. In the laundry treatment apparatus according to an embodiment of the present disclosure, the induction module 8 heats the drum 3 to heat and dry laundry in contact with the drum 3 . In the drying cycle (S60), the induction string module 8 may heat the drum 3, and the driving unit 6 may rotate the drum 3).

Drying proceeds, and lint may be separated from the laundry. The separated lint may accumulate in the gasket 4 and the door 12 .

7 is a view illustrating a part of a washing cycle applied to a laundry treatment apparatus according to an exemplary embodiment of the present disclosure.

Referring to FIG. 7 , a rinsing operation ( S40 ) of the laundry treatment apparatus according to an exemplary embodiment of the present disclosure will be described in more detail.

In the laundry treatment apparatus of the present embodiment, a rinsing operation (S40) may be performed after the dehydration operation (S30). When the rinsing operation (S40) is performed, for rinsing the laundry accommodated in the drum 3, the control unit 10 performs a first water supply step (S41) of supplying water to the rinsing water level through the water supply passage 51. do.

The water level supplied in the first water supply step ( S41 ) may be set differently depending on the size of the laundry treatment apparatus and the amount of laundry that the laundry treatment apparatus can accommodate.

In general, the water level for rinsing laundry may be set to be higher than the height (minimum water level) from the lower end of the tub 2 to the lower end of the drum 3 . That is, at least a part of the drum 3 must be able to contact the wash water so that the wash water can flow by friction with the drum 3 .

In addition, the maximum limit value of the water level for rinsing the laundry is not set, but may be set differently according to the amount of laundry that the laundry treatment apparatus can accommodate as described above.

However, the controller 10 may control the water level for rinsing to be less than or equal to the full water level. The full water level refers to a water level at which washing water fills the tub 2 and the drum 3 and overflows into the gasket 4 portion.

Accordingly, the first water supply step ( S41 ) refers to the water supply level for performing the rinsing cycle through the laundry treatment apparatus of the present embodiment. In addition, the amount of wet cloth in the drum may be sensed while supplying water for the rinsing. The rolling motion or the tumbling motion may be repeatedly performed when detecting the amount of compresses on the drum.

After the water is supplied to the tub in the first water supply step (S41), a rotation step (S43) of rotating the drum 3 at a first RPM is performed. The first RPM is an RPM that can be set differently depending on the amount of compresses described above. In the rinsing step, the drum may be rotated by stirring left and right, or intermittently rotated in one direction to separate detergent and foreign substances remaining in the laundry. For example, the above-described rolling motion, tumbling motion, scrub motion, etc. may be performed.

That is, the rotating step S43 is a step of rotating the drum for rinsing the laundry.

However, the first water supply step (S41) and the rotation step (S43) described above are not essential steps. Accordingly, the first water supply step ( S41 ) and the rotation step ( S43 ) may be omitted.

After the rotating step (S43), a second water supply step (S451) of supplying water to the tub 2 to a first water level higher than the water level in the first water supply step (S41) through the water supply unit is performed. When the rotation step (S43) is omitted, the step (S451) of supplying water to the tub (2) up to the first water level after the dehydration operation (S30) may be performed.

The first water level supplied in the second water supply step ( S451 ) may mean a water level equal to or higher than the full water level described above. In more detail, since the full water level means a water level at which washing water fills the tub 2 and the drum 3 and overflows into the gasket 4 portion, it may be set to a lower water level than the lower end of the tub opening 21. .

Accordingly, the first water level may be set to a water level higher than the lower end of the tub opening 21 , and may be set to a water level that can be submerged even to a lower portion of the gasket 4 .

In the laundry treatment apparatus of this embodiment, the induction module 8 is applied to perform washing and drying. Since the drum 3 is directly heated by the induction module 8 to transfer heat to the laundry and wash water accommodated in the drum, the circulation path provided in the conventional laundry treatment apparatus is not provided. Therefore, by removing the circulation passage, the space inside the cabinet 1 can be utilized. For example, by increasing the capacity of the tub and drum, a larger amount of laundry and washing water can be accommodated compared to the laundry treatment apparatus provided with the cabinet 1 of the same size.

However, since the flow (flow of air flowing from the front of the tub to the rear of the tub) generated by the conventional circulation flow path is absent, there may be a problem in that lint is stacked on the inner surface of the door and the inner peripheral surface of the gasket.

Accordingly, in the laundry treatment apparatus of this embodiment, when lint generated during the drying operation is accumulated on the inner surface of the door or the inner circumference of the gasket, the next laundry treatment apparatus is operated to perform the rinsing operation, and the lint removal motion (S45) is performed to remove the lint from the door. It is intended to remove lint laminated or attached to the inner surface of the gasket and the inner surface of the gasket.

Therefore, the first water level supplied from the second water supply ( S451 ) may be set to be higher than the water level supplied from the conventional rinsing cycle. For example, the first water level may be set to a water level at which the lower portion of the inner circumferential surface of the gasket or the lower portion of the inner circumferential surface of the door can be submerged.

After water is supplied to the first water level in the second water supply step (S451), an acceleration step (S455) of accelerating the drum 3 to a second RPM may be performed. The accelerating step (S455) is a step of accelerating the drum 3 to the second RPM capable of forming a water flow of water supplied to the first water level, wherein the second RPM is the same as the first RPM described above. It is an RPM that can be set differently depending on the

Preferably, the second RPM may be set equal to or greater than the first RPM. As the second water supply step (S451) is performed, the amount of wet laundry contained in the drum 3 may increase, and the first water level is higher than the water level in the first water supply step. If the second RPM is set to be smaller than the first RPM, it may not be easy to form a water flow to be generated through the wash water supplied to the first water level.

In addition, the second RPM may be set to be the same as the drum RPM in the above-described filtration motion. The drum RPM in the filtration motion may be set to the RPM in which the laundry is attached to the inner circumferential surface of the drum and rotates, but in this step, the laundry is attached to the inner circumferential surface of the drum and rises at the second RPM according to the amount of wet laundry. It can fall back to the bottom of the drum. When the laundry falls to the lowest point of the drum, the supplied wash water splashes toward the front of the tub, so that lint accumulated on the inner surface of the door and the inner surface of the gasket can be removed.

Meanwhile, as described above, the rotating step S43 may be omitted. Hereinafter, the second RPM is also referred to as a first rotational speed.

Meanwhile, while the accelerating step S455 is performed, a circulating water supply step S453 of driving the circulation pump 55 to supply the water discharged from the tub 2 to the inner circumferential surface of the gasket 4 may be performed.

The circulating water supply step (S453) may be performed simultaneously with the acceleration step (S455). Of course, the circulating water supply step (S453) may be performed before the acceleration step (S455). When the driving of the circulation pump 55 and the acceleration of the drum 3 to the first rotational speed are simultaneously performed, the gasket is formed while the drum 3 is accelerating or after the drum 3 reaches the first rotational speed. This is because circulating water can be supplied to the inner peripheral surface of (4).

In the circulating water supply step (S453), the driving of the circulation pump 55 is started simultaneously with the acceleration step (S455) in which the drum 3 accelerates to the first rotational speed, or the driving of the circulation pump 55 is The drum 3 may be preceded before starting to accelerate to the first rotational speed.

Visually, while the drum 3 accelerates to the first rotational speed, the wash water supplied to the first water level is formed as the drum 3 rotates, and the circulating water is supplied to the inner peripheral surface of the gasket 4 . Remove lint from the inner surface of the door and the inner surface of the gasket.

And as the rotational speed of the drum is accelerated in the acceleration step (S455), it is attached to the inner peripheral surface of the drum along the rotational direction of the drum and ascends because it goes through the rotational speed in the tumbling motion (hereinafter also referred to as the second rotational speed). As the laundry falls to the lowest point of the drum, the washing water may splash toward the front of the tub. The effect of removing lint can be expected by supplying wash water to the inner surface of the door and the inner peripheral surface of the gasket by splashing the wash water in the front of the tub.

On the other hand, before the drum 3 is accelerated (S455) and rotated (S457) to the first rotational speed (second RPM), the drum 3 may be rotated at the second rotational speed. Thereby, lint on the inner surface of the door and the inner surface of the gasket can be removed. Alternatively, after rotating the drum 3 at the first rotational speed (S457), the drum 3 may be rotated at the second rotational speed.

After the acceleration step (S455), the water supplied to the first water level by maintaining the rotation of the drum 3 at the first rotation speed (second RPM) forms a water flow according to the rotation of the drum 3 Thus, a lint removal step (S457) of removing lint accumulated on the inner peripheral surface of the gasket 4 and the inner surface of the door 12 may be performed.

In the lint removal step (S457), the lint accumulated on the inner surface of the door and the inner surface of the gasket is removed by forming a water flow through the wash water supplied to the first water level while maintaining the rotation of the drum 3 at the first rotation speed. is a step to

In more detail, as the drum 3 rotates at the first rotational speed, the water level of the wash water supplied to the first water level is changed, and the washing water splashes onto the inner surface of the door and the inner peripheral surface of the gasket.

As described above, the first water level is the water level at which the lower part of the inner surface of the door or the lower part of the inner peripheral surface of the gasket is submerged. Lint accumulated on the inner surface of the door or the inner surface of the gasket may be removed due to the phenomenon in which the washing water splashes forward of the tub.

Meanwhile, after the lint removal step (S457), a deceleration step (S459) of decelerating the rotation of the drum (3) may be performed. The deceleration step (S459) is a step of decelerating the rotation of the drum 3 by applying a torque to the motor in a direction opposite to the rotation direction of the drum 3 and applying a brake.

Therefore, as the laundry attached to the inner circumferential surface of the drum 3 falls to the lowest point of the drum 3, the wash water splashes toward the front of the tub, thereby removing the lint accumulated on the inner circumferential surface of the door and the gasket. .

That is, the motion of the drum in the deceleration step S459 temporarily corresponds to the above-described step motion.

On the other hand, after the drum 3 is rotated at a first rotational speed and then braked, a step motion may be implemented. That is, after the drum 3 is rotated (S457) at the first rotational speed and then braked (S459), the drum 3 is again rotated at the first rotational speed by a rotational angle within the range of 90 degrees to 180 degrees and the drum 3 ), and this rotation and braking can be repeated alternately. Thereby, the lint accumulated in the gasket 4 and the door 12 can be removed.

Meanwhile, in order to effectively remove lint through each of the above-described steps, the circulating water supply step may be simultaneously performed while the acceleration step and the lint removal step are performed, and the water level of the tub at the start of the acceleration step preferably reaches the first water level. This will be described in more detail with reference to FIGS. 8 and 9 .

8 is a view showing the relationship between water level, drum RPM, water supply and circulation during some of the washing cycles of the drum according to an embodiment of the present disclosure, and FIG. am.

The left vertical axis of the graph shown in FIG. 8 represents the RPM of the drum, the right vertical axis of the graph represents the water level frequency, and the horizontal axis of the graph represents time.

The water level frequency may be measured by the water level sensor 113 . The water level frequency is inversely proportional to the water level inside the tub (2). That is, when the water level frequency is low, the water level inside the tub is low, and when the water level frequency is high, it means that the water level inside the tub 2 is high.

Hereinafter, it will be described with reference to FIGS. 8 and 9 .

8 is a view showing the relationship between the water level, drum RPM, water supply, and circulation inside the tub during the lint removal motion (S45).

The first section (G1) is a section in which the rotation of the drum 3 is maintained while the second water supply (S451) proceeds after the rotating step (S43). Since water is supplied to the first water level through the water supply unit in the first section G1, the water level inside the tub is increased. For example, the water level frequency is lowered from 22.8 KHZ to 22.6 KHZ as the water supply progresses. As described above, the lowering of the water level frequency means that the water level inside the tub increases.

The second section G2 corresponds to the acceleration step S455 described above. In the second section G2 , the circulation pump 55 is operated to supply circulation water through the circulation passage 57 . The water level frequency at the start of the second section G2 is 22.6 KHZ, and the wash water inside the tub 2 forms the first water level.

The third section G3 corresponds to the lint removal step S455 described above. In the third section G3, the drum 3 rotates at a first rotational speed (second RPM) to form a water flow of wash water, and the circulating water is supplied through the circulation passage 57 . As the third section G3 progresses, it can be seen that the water level frequency increases. That is, the water level inside the tub 2 is lowered as the third section G3 proceeds. Due to the rotational motion of the drum 3, the laundry inside the drum can absorb more water.

The fourth section G4 corresponds to the deceleration step S459 described above. In the fourth section G4, the drum 3 is decelerated at the first rotational speed (second RPM). The drum 3 of this embodiment is braked in the deceleration step (S459) to stop the rotation, but it is not necessarily limited thereto. it might be

When the drum decelerates from the first rotational speed, the laundry attached to the inner circumferential surface of the drum falls, and as a result, water splashes toward the front of the tub, thereby removing lint accumulated on the inner circumferential surface of the door and gasket. Because. That is, since the lint removal effect can be expected as the drum 3 decelerates from the first rotation speed in the fourth section G4, the rotation of the drum 3 is decelerated and stopped, or is higher than the first rotation speed. It can be slowed down to a lower RPM.

In the fourth section G4, the deceleration of the drum 3 is performed through reverse-phase braking. Accordingly, the magnitude of the acceleration at which the drum 3 is decelerated in the fourth section G4 may be greater than the magnitude of the acceleration at which the drum 3 is accelerated in the second section G2 .

When the fourth section (G4) starts, the operation of the circulation pump (55) may be stopped, so that the supply of circulating water may be stopped. And since the water supply of wash water through the water supply unit is performed in the entire section in which the lint removal motion S45 is performed, the water level in the tub lowered in the third section G3 is the first water level in the fifth section G5. , so that a sixth section (G6, acceleration step) may be performed at the first water level.

Accordingly, the operation of the circulation pump 55 may be performed within the 14th section G14 including the second section G2 and the third section G3.

From the fifth section (G5) to the thirteenth section (G13), the rotational speed variable section of the drum (3) and the operation section of the circulation pump (55) are repeated in the same manner, and in the first section (G1), the thirteenth section The water supply of wash water through the water supply unit is continuously performed until the section G13.

As water is continuously supplied into the tub, a section maintained at the first water level becomes longer than that of the third section G3 while the drum rotates at the first rotational speed in the seventh section G7. And while the drum rotates at the first rotation speed in the eleventh section (G11), the water level in the tub is maintained at the first water level, and even at the time when the drum decelerates from the first rotation speed in the twelfth section (G12), the first water level can be maintained as

That is, the first period ( G1 ) to the fourth period ( G4 ), the fifth period ( G5 ) to the eighth period ( G8 ), and the ninth period ( G9 ) to the thirteenth period ( G13 ) are the first cycle and the second period, respectively. A cycle and a third cycle may be formed. In each cycle, the RPM change of the drum and the operation time of the circulation pump are the same, but as each cycle progresses, the section maintained at the first water level becomes longer.

Therefore, since the water level when the drum accelerates, rotates, and decelerates for each cycle is different, the amount and part (upper side, center side, and lower side) of the water flow formed according to the motion of the drum are transferred to the front of the tub and are different from each other. Lint accumulated in other areas can be removed. Hereinafter, it will be described in more detail with reference to FIGS. 8 and 9 .

9(a), (b), and (c) are views schematically illustrating the flow of lint accumulated on the inner circumferential surface of the gasket and wash water delivered to the inner circumferential surface of the gasket, and FIG. 9(d) is the inner surface of the door. It is a diagram schematically showing the flow of washing water flowing along.

When the drum of the third section (G3) rotates at the first rotational speed (second RPM), the water level in the tub maintains the first water level, and as the third section (G3) proceeds, the water level in the tub decreases again. that can be checked In this case, as the water level in the tub is lowered, the height at which water splashes when the drum rotates is also lowered. That is, referring to FIG. 9A , the water flow formed by the rotation of the drum may remove lint accumulated on the lower side of the gasket.

And in the second section (G2), the sixth section (G6), and the tenth section (G10), when the drum is accelerated to the first rotational speed while the rotation is stopped, the water level in the tub is maintained at the first water level . As the drum accelerates, the wash water rises along the inner circumferential surface of the drum, so that the water level at the center of the drum is lowered and the water level at both sides of the drum increases. Accordingly, referring to FIG. 9B , lint accumulated on both lower sides of the gasket can be removed through the water level formed in the acceleration section of the drum.

And while the drum rotates at the first rotational speed in the eleventh section G11, the water level inside the tub maintains the first water level. Therefore, compared to the third section ( G3 ) and the seventh section ( G7 ) in which the water level is variable, a change in the water level of the wash water supplied up to the first water level can form a larger water flow. Accordingly, referring to FIGS. 9C and 9D , the water flow formed in the eleventh section G11 is transmitted to both upper portions of the gasket and the door to remove accumulated lint.

And when the rotation of the drum decreases from the first rotation speed in the twelfth section (G12), the water level inside the tub maintains the first water level. In this case, as the laundry attached to the inner circumferential surface of the drum falls to the surface of the wash water, the water splashing height in the front of the tub may be formed the highest. Therefore, referring to FIG. 9(c) , the lint located on the upper side of the inner circumferential surface of the gasket may be removed due to the water splashing phenomenon that occurs while the laundry falls in the twelfth section G12.

Also, referring to FIG. 9( d ), in the lint removal motion, the lint attached to the central portion of the inner surface of the door may be removed by supplying wash water through the water supply unit.

Any or other embodiments of the present disclosure described above are not mutually exclusive or distinct. Certain embodiments or other embodiments of the disclosure described above are not mutually exclusive or distinct from each other. Any or all elements of the embodiments of the disclosure described above may be combined with another or combined with each other in configuration or function).

For example, it means that configuration A described in a specific embodiment and/or drawing may be combined with configuration B described in another embodiment and/or drawing. That is, even if the combination between the configurations is not directly described, it means that the combination is possible except when it is explained that the combination is impossible (For example, a configuration “A” described in one embodiment of the disclosure and the drawings). and a configuration "B" described in another embodiment of the disclosure and the drawings may be combined with each other. Namely, although the combination between the configurations is not directly described, the combination is possible except in the case where it is described that the combination is impossible).

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention (although embodiments have been described with reference to a number of illustrative embodiments) thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope of the principles of this disclosure. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art).

Claims (14)

a cabinet having an inlet on the front side;
a door coupled to the cabinet to open and close the inlet;
a tub disposed inside the cabinet, having an opening communicating with an inlet of the cabinet, and providing a space for accommodating water;
a drum rotatably provided in the tub and providing a space for accommodating laundry;
a driving unit for rotating the drum;
a gasket connecting the inlet of the cabinet and the opening of the tub, the gasket having an inner surface providing a laundry access passage; and,
It includes a water supply unit for supplying water to the tub,
The water supply unit supplies water to the tub up to a first water level higher than the lowermost portion of the inner surface of the gasket,
The driving unit, in a state in which the water level of the tub is the first water level, rotates the drum at a first rotational speed in which centrifugal force acting on the laundry in the drum by the rotation of the drum is greater than the gravity acting on the laundry. clothes processing equipment.
According to claim 1,
The driving unit may be configured to accelerate the drum to the first rotation speed while the water level of the tub is at the first water level.
3. The method of claim 2,
In the section in which the driving unit accelerates the drum to the first rotational speed, the drum accelerates to the first rotational speed through a second rotational speed slower than the first rotational speed,
The second rotational speed is a rotational speed at which laundry in the drum rises to a height corresponding to a rotation center of the drum due to the rotation of the drum and then separates from the drum and falls.
4. The method of claim 3,
The driving unit may be configured to rotate the drum while maintaining the second rotation speed while the water level of the tub is at the first water level.
According to claim 1,
Further comprising a water level sensor for detecting the water level of the tub,
The driving unit stops after rotating the drum at the first rotational speed,
The water level detection unit is a laundry treatment apparatus for detecting the water level of the tub in a state in which the drum is stopped.
6. The method of claim 5,
The water supply unit may be configured to re-supply water to the tub up to the first water level when the water level of the tub is lower than the first water level after the drum rotates at the first rotational speed.
7. The method of claim 6,
The driving unit may further rotate the drum at the first rotational speed after the water supply unit re-supplys water to the tub.
According to claim 1,
The driving unit rotates the drum at the first rotation speed and then brakes the drum.
9. The method of claim 8,
The phase of the power applied to the driving unit during the braking period of the drum is reversed from the phase of the power applied to the driving unit during the period in which the drum rotates at the first rotational speed.
9. The method of claim 8,
The driving unit, before rotating the drum at the first rotational speed, accelerate the drum to the first rotational speed,
The magnitude of the acceleration in the section in which the drum brakes is greater than the magnitude of the acceleration in the section in which the drum accelerates to the first rotational speed.
9. The method of claim 8,
The drive unit,
In a state where the water level in the tub is the first water level, the drum is rotated by a rotation angle within the range of 90 degrees to 180 degrees at the first rotation speed, and then the drum is braked, and rotation and braking of the drum A clothes processing device that alternately repeats
According to claim 1,
a circulation pump for pumping the water discharged from the tub;
a nozzle provided in the gasket and having an outlet located in the laundry access passage; and,
Further comprising a circulation passage connecting the circulation pump and the nozzle,
The circulation pump is a laundry treatment apparatus driven when the driving unit rotates the drum.
According to claim 1,
It is disposed on the outer surface of the tub, further comprising an induction heater for heating the drum,
The induction heater heats the drum in a state in which the water in the tub is drained,
When the induction heater heats the drum, the driving unit rotates the drum.
According to claim 1,
The laundry treatment apparatus further comprising a control unit for controlling the driving unit and the water supply unit.

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