KR20240086392A - Laundary treating apparatus and control method for the same - Google Patents

Abstract

A clothing processing device and a control method thereof are disclosed, and the clothing processing device according to an embodiment of the present invention includes a cabinet, a tub, a gasket surrounding an inlet, a drum, a driving unit that rotates the drum, a water supply unit, and a control unit, In the washing cycle, the control unit controls the water supply unit so that the water level in the stationary state of the drum is higher than the bottom of the front of the drum, and controls the driving unit so that the drum rotates at the front washing RPM so that the water in the tub flows into the gasket. It forms a forward washing water flow that rotates along the inner circumferential surface of the.

Description

Clothing processing device and its control method {LAUNDARY TREATING APPARATUS AND CONTROL METHOD FOR THE SAME}

The present invention relates to a clothing treatment device, which can wash clothes using detergent.

A clothing treatment device is a device that removes contamination from laundry by putting clothes, bedding, etc. (hereinafter referred to as laundry) into a drum. The clothing processing device can perform processes such as washing, rinsing, dehydration, and drying. The clothing processing device is divided into a top loading method and a front loading method based on the method of putting laundry into the drum. can be distinguished.

The laundry treatment device may include a housing that forms the exterior, a tub accommodated inside the housing, and a drum rotatably mounted inside the tub into which laundry is loaded.

When the drum is rotated by a motor or the like while washing water is supplied to the laundry contained in the drum, dirt on the laundry can be removed by friction between the drum and the washing water.

Meanwhile, the wash water inside the tub may contain contaminants removed from clothes during the washing process or contain detergent, and even if the wash water is discharged from the tub after the end of the washing process, some of the contaminants and the detergent may still be inside the tub. may remain in

As described above, contaminants remaining inside the tub may adhere to and become fixed on the surface of the tub and drum, and as the number of repetitions of the washing process increases, the amount of remaining contaminants may increase.

Contaminants remaining on the surface of the tub and drum may be mixed with the washing water during the washing process, re-contaminating the clothes or causing the growth of bacteria, etc., which may reduce the washing performance and hygiene of the clothes.

Meanwhile, related document KR 2007-0057567 A discloses a clothing treatment device that can perform a washing process to clean the inside of a tub. The clothing treatment device in the related literature rotates the drum while the tub is filled with water to remove contaminants, etc. from the inner peripheral surface of the tub.

However, the clothing treatment device in the related literature only discloses a method of cleaning the inside of the tub through simple rotation of the drum. In this case, there is a possibility that at least part of the circumferential surface of the tub and drum is cleaned, but the front or back of the tub and drum are not cleaned. It is difficult to wash.

Furthermore, the front loader type clothing treatment device may be installed so that the front end is positioned higher than the rear end to prevent leakage of washing water and clothing present in the tub and drum, that is, it may be installed with an upward slope toward the front.

In this case, due to the inclined shape of the tub and drum, it is more difficult to clean not only the front of the tub and drum but also the inner side of the door that opens and closes the inlet of the laundry treatment device with only the water flow flowing along the inner peripheral surface of the tub as the drum rotates.

Therefore, developing a clothing treatment device that can improve the washing performance and efficiency of drums and tubs and further effectively clean the front side of drums and tubs is an important task in this technical field.

Embodiments of the present invention seek to provide a clothing treatment device that can clean a tub and drum.

Additionally, embodiments of the present invention seek to provide a clothing treatment device that can effectively improve the cleaning performance and cleaning efficiency of the tub and drum.

Additionally, embodiments of the present invention seek to provide a clothing treatment device that can effectively clean the front side of the tub and drum.

Additionally, embodiments of the present invention seek to provide a clothing treatment device that can effectively clean the gasket provided in the tub and the inner side of the door.

Additionally, embodiments of the present invention seek to provide a clothing treatment device that can effectively prevent a backflow phenomenon in which water in the tub moves out of the tub.

A clothing treatment device according to an embodiment of the present invention includes a control unit that performs a washing process. In the washing cycle, the control unit controls the water supply unit so that the level of water contained inside the tub is higher than the bottom of the front of the drum when the drum is stopped, and the drum is rotated at the front washing RPM to create a front washing water flow in which water rotates along the inner circumference of the gasket. forms.

The front washing water flow may be formed by water flowing to the inner peripheral surface of the gasket as the water inside the tub moves forward due to centrifugal force or the like. The water flowing to the inner circumferential surface of the gasket forms a water flow by the rotational force of the drum and can rotate along the inner circumferential surface of the gasket.

In one embodiment of the present invention, the water in the tub flows forward through the control of the water supply unit and the driving unit to form a rotating front washing water flow, thereby cleaning the front of the drum and tub as well as the inner side of the gasket and door. .

The clothing treatment device according to an embodiment of the present invention includes a cabinet, a tub, a gasket, a drum, a driving unit, a water supply unit, and a control unit.

The cabinet is equipped with an input port at the front. A tub is provided inside the cabinet to store water. A gasket is provided between the front of the cabinet and the tub and surrounds the inlet.

A drum is rotatably provided inside the tub to accommodate clothing, and has a drum opening facing the input port. The driving unit is connected to the drum and rotates the drum.

The water supply unit is connected to an external water supply source and provides water to the tub. The control unit controls the driving unit in an unloaded state in which no clothes are accommodated in the drum to perform a washing cycle of the drum.

The drum is installed at an angle so that the lower end of the front of the drum, where the drum opening is provided, is positioned higher than the lower end of the rear of the drum connected to the driving unit.

In the washing cycle, the control unit controls the water supply unit so that the water level in the stationary state of the drum is higher than the bottom of the front of the drum, and controls the driving unit so that the drum rotates at the front washing RPM so that the water in the tub flows into the gasket. It forms a forward washing water flow that rotates along the inner circumferential surface of the.

The front washing water flow may be rotated along the inner peripheral surface of the gasket so as to exceed the horizontal center line of the gasket. The front wash water flow may fall from the inner peripheral surface of the gasket before reaching the vertical center line of the gasket.

The front wash RPM may be set lower as the level of water stored in the tub rises. The front wash RPM may correspond to 100 RPM or more.

One embodiment of the present invention may further include a water supply pipe connected to the top of the tub and guiding water to the tub. The front washing RPM may be set so that the centrifugal force acting on the water inside the tub is 1G or less.

The front wash RPM may be set to be different from the resonance frequency formed by the driving unit. The control unit may control the water supply unit so that the stationary water level of the drum is located below the lower end of the drum opening during the washing cycle.

The control unit may control the water supply unit so that the stationary water level of the drum is located below the lower end of the inner circumferential surface of the gasket during the cleaning cycle.

The washing stroke includes a front washing stroke and a rear washing stroke, and the control unit rotates the drum at the front washing RPM in the front washing stroke, and rotates the drum at a rear washing RPM lower than the front washing RPM in the rear washing stroke. It can be rotated by RPM.

In the front washing stroke, the water in the tub flows along the inner peripheral surface of the gasket, and in the rear washing stroke, the water in the tub may be located rearward of the gasket.

The drum includes a rear surface of the drum facing the front of the drum, and the water level of the tub may be higher in the rear washing stroke than in the front washing stroke, based on the rear surface of the drum.

One embodiment of the present invention may further include a drain connected to the tub to discharge water from the tub to the outside of the cabinet. The control unit may control the drain unit so that water from the tub is not drained during the front washing stroke and water from the tub is drained during the rear washing stroke.

Before the washing stroke, the control unit may rotate the driving unit so that the drum rotates and perform a laundry weight detection stroke to detect the no-load state.

Before the washing operation, the controller may perform an emptying operation to control the drain unit so that water inside the tub is discharged.

The emptying process includes a supply and discharge process. In the supply and discharge process, the controller may control the water supply unit to supply water into the tub and control the drain unit to discharge water inside the tub.

In the water supply and discharge process, the controller may control the water supply unit and the drain unit to start draining the tub when a preset water supply maintenance time has elapsed after the water supply to the tub starts.

The emptying process includes a tub rinsing stroke, and in the tub rinsing stroke, the controller controls the water supply unit to supply water into the tub, controls the drain unit to discharge water inside the tub, and the drive unit The drum can be rotated by controlling.

The gasket is provided with a water spray unit that sprays water into the tub, and during the tub rinsing process, the control unit can control the water supply unit to spray water into the tub through the water spray unit.

In the tub rinsing cycle, the control unit may control the driving unit so that the rotating state and the stationary state of the drum alternate.

In the tub rinsing cycle, the control unit may control the drain unit to discharge water from the tub in the stopped state of the drum.

After the washing stroke, the control unit rotates the drum at a dehydration RPM higher than the front washing RPM and may perform a dehydration stroke to discharge water out of the tub.

Meanwhile, a clothing treatment device according to an embodiment of the present invention includes a cabinet provided with an inlet on the front, a tub provided inside the cabinet to store water, a drum rotatably provided inside the tub to accommodate clothing, and the drum. A driving unit connected to the drum to rotate the drum, a drain unit connected to the tub to discharge water from the tub, and a control unit to control the driving unit to perform a washing cycle of the drum in an unloaded state in which no clothes are accommodated in the drum. may include.

In the washing cycle, the control unit controls the drain unit so that water from the tub is not discharged when the drum is rotated at a first RPM, and the control unit controls the drain unit to prevent water from being discharged from the tub when the drum is rotated at a second RPM lower than the first RPM. The drain unit can be controlled so that water is discharged.

The control unit supplies water to the tub when the drum is stopped, stops supplying water before the drum rotates at the first RPM, and discharges water from the tub when the drum rotates at the second RPM. The driving unit, the water supply unit, and the drain unit can be controlled as much as possible.

When the drum is rotated at a first RPM, the water in the tub rotates along the inner peripheral surface of the gasket, and when the drum is rotated at a second RPM, the water in the tub may be located rearward of the gasket.

Before the washing process, the control unit may control the water supply unit to supply water to the tub and control the drain unit to perform an emptying process to discharge water from the tub.

In the emptying stroke, the controller may control the driving unit in at least some sections to rotate the drum at an RPM lower than the first RPM.

Meanwhile, the control method of the clothing treatment device according to an embodiment of the present invention may include a laundry weight detection step and a washing step. In the laundry weight detection operation step, the control unit determines a no-load state in which no clothing is placed inside the drum.

In the washing stroke performance step, when the no-load state is determined in the laundry weight detection stroke performance step, the control unit controls the driving unit to rotate the drum at a preset front washing RPM, so that the water of the tub follows the inner peripheral surface of the gasket. It forms a rotating front wash water stream.

The washing stroke performance step may include a front washing stroke performance process and a rear washing stroke performance process.

In the process of performing the front washing stroke, the control unit controls the water supply unit connected to the tub to supply water to the tub, and then controls the driving unit to rotate the drum at the front washing RPM.

In the rear washing stroke performance process, after the front washing stroke performance process, the control unit controls the drain connected to the tub to discharge water from the tub and controls the driving unit to rotate the drum to a rear washing RPM lower than the front washing RPM. It can be rotated.

In one embodiment of the present invention, before the step of performing the washing stroke, an emptying stroke is performed in which the control unit controls a water supply unit connected to the tub to supply water to the tub and controls a drain unit connected to the tub to discharge water from the tub. Additional execution steps may be included.

Embodiments of the present invention can provide a clothing treatment device that can wash a tub and drum.

Additionally, embodiments of the present invention can provide a clothing treatment device that can effectively improve the cleaning performance and cleaning efficiency of the tub and drum.

Additionally, embodiments of the present invention can provide a clothing treatment device that can effectively clean the front side of the tub and drum.

Additionally, embodiments of the present invention can provide a clothing treatment device that can effectively clean the gasket provided in the tub and the inner side of the door.

Additionally, embodiments of the present invention can provide a clothing treatment device that can effectively prevent a backflow phenomenon in which water in the tub moves out of the tub.

1 is a perspective view showing the appearance of a clothing treatment device according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing the inside of a laundry treatment device according to an embodiment of the present invention.
Figure 3 is a conceptual diagram showing the processes that may be included in the tub washing course in one embodiment of the present invention.
Figure 4 is a conceptual diagram showing administrations that may be included in the emptying administration in an embodiment of the present invention.
Figure 5 is a graph showing the operating states of the water supply valve, injection valve, and drain pump, the water level in the tub, and the RPM of the drum during the emptying stroke in one embodiment of the present invention.
Figure 6 is a graph showing the operational relationship between the water supply valve and the drain pump in the water supply and drain stroke in one embodiment of the present invention.
Figure 7 is a diagram showing the flow of water according to the supply and discharge stroke inside the clothing treatment device according to an embodiment of the present invention.
Figure 8 is a graph showing the injection valve, drain pump, and RPM of the bath rinse cycle in one embodiment of the present invention.
Figure 9 is a diagram illustrating the flow of water during a full-rinsing cycle inside a clothing treatment device according to an embodiment of the present invention.
Figure 10 is a conceptual diagram showing the processes included in the washing process in one embodiment of the present invention.
Figure 11 is a diagram showing the water supply valve, drain pump, water level, and RPM of the washing stroke in one embodiment of the present invention.
Figure 12 is a graph showing the RPM change of the front washing stroke and the rear washing stroke in one embodiment of the present invention.
Figure 13 is a diagram showing the water level according to the stopped state of the drum during the washing cycle in one embodiment of the present invention.
Figure 14 is a diagram showing the flow of water during the front washing stroke in one embodiment of the present invention.
Figure 15 is a view of the front wash water flow viewed from the outside of the door in one embodiment of the present invention.
Figure 16 is a diagram showing the allowable range of water level for performing a washing cycle in one embodiment of the present invention.
Figure 17 is a diagram showing the flow of water according to the water level below the lower limit water level during the front washing stroke in one embodiment of the present invention.
Figure 18 is a diagram showing the flow of water according to the water level exceeding the upper limit water level during the front washing stroke in one embodiment of the present invention.
Figure 19 is a diagram showing a backflow state of water during the front washing stroke in one embodiment of the present invention.
Figure 20 is a graph showing the relationship between the RPM of the drum and the resonance frequency of the driving unit in one embodiment of the present invention.
Figure 21 is a diagram showing the flow of water during the rear washing stroke in one embodiment of the present invention.
Figure 22 is a graph showing the operating relationship, water level, and RPM of the water supply valve, injection valve, and drain pump for the tub washing course in one embodiment of the present invention.
Figure 23 is a flowchart showing a control method of a clothing treatment device according to an embodiment of the present invention.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention.

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

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

Also, in this specification, when a component is mentioned as being 'connected' or 'connected' to another component, it may be directly connected or connected to the other component, but may be connected to the other component in the middle. It should be understood that may exist. On the other hand, in this specification, when it is mentioned that a component is 'directly connected' or 'directly connected' to another component, it should be understood that there are no other components in between.

Additionally, the terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention.

Also, in this specification, singular expressions may include plural expressions, unless the context clearly dictates otherwise.

In addition, in this specification, terms such as 'include' or 'have' are only intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and one or more It should be understood that this does not exclude in advance the presence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

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

Figure 1 shows the exterior of a clothing treatment device 1 according to an embodiment of the present invention. The laundry treatment device 1 according to an embodiment of the present invention includes a cabinet 10 that forms the exterior.

The cabinet 10 forms a space inside which the tub 20 and the drum 30 are installed, and may be provided by combining a plurality of panels.

A clothing input port 15 may be provided at the front 12 of the cabinet 10. The user can put clothes into the cabinet 10 through the input port 15. Additionally, a door 18 may be provided on the front 12 of the cabinet 10, and the door 18 may be provided to open and close the inlet 15.

For example, the door 18 may be rotatably installed on the front 12 of the cabinet 10, and the inlet 15 may be opened or closed depending on the rotation position. The door 18 may be at least partially transparent so that the user can check the inside of the cabinet 10.

One embodiment of the present invention may include a control panel 80, and at least a portion of the control panel 80 may be exposed to the outside of the cabinet 10. The control panel 80 can provide information to the user and generate command signals by the user.

The control panel 80 may include a screen output unit to provide visual information to the user, and the screen output unit may be exposed to the outside of the cabinet 10 and be provided in the cabinet 10 so that the user can check it with the naked eye. You can.

One embodiment of the present invention may include a detergent supply device 65. The detergent supply device 65 may be in communication with the tub 20 and may be provided to supply detergent to the tub 20 in a laundry course for washing clothes.

The detergent supply device 65 may be provided to store detergent, and may be provided as a manual type that stores detergent each time the user performs a washing cycle, or an automatic type that can supply detergent for multiple wash cycles by storing detergent once. .

One embodiment of the present invention may further include an external communication pipe (28). The external communication pipe 28 may be provided to communicate with the inside of the tub 20 provided inside the cabinet 10 and the outside of the cabinet 10.

That is, one end of the external communication pipe 28 is connected to the tub 20, and the other end is connected to the cabinet 10 to communicate between the inside of the tub 20 and the outside of the cabinet 10, and thus the tub ( 20) Since external air can be supplied inside, unexpected accidents can be prevented or the pressure inside the tub 20 can be adjusted.

Meanwhile, Figure 2 shows the interior of a clothing treatment device 1 according to an embodiment of the present invention. One embodiment of the present invention includes a tub 20 and a drum 30.

The tub 20 may be provided in a substantially cylindrical shape and may have a space inside to store water. One embodiment of the present invention may be a front loader type in which an inlet 15 is formed on the front 12 of the cabinet 10, and the tub 20 has a tub opening 25 open toward the inlet 15. may include.

The drum 30 may be installed inside the tub 20 and may be connected to the driving unit 50 to be rotatable. The drum 30 may be provided in a substantially cylindrical shape to correspond to the tub 20.

The drum 30 may be provided to accommodate clothing and may include a drum opening 35 that is open inside the tub 20 toward the tub opening 25 . Accordingly, clothing input through the input port 15 of the cabinet 10 can be accommodated inside the drum 30 through the tub opening 25 and the drum opening 35.

The drum 30 may include a drum front 31, a drum circumference 32, and a drum rear 33. The drum front 31 may be provided with the drum opening 35. A drum front 31 may be positioned around the drum opening 35.

The drum front 31 may be one side facing the front of the tub 20 or the front 12 of the cabinet 10. The drum opening 35 may be formed in the center of the drum front 31. Depending on the size of the drum opening 35, the drum front 31 may be in the shape of a flange surrounding the drum opening 35.

The drum circumferential surface 32 may extend along the circumference of the drum front 31 and be connected to the circumference of the drum front 31. The drum front 31 may be connected to the front of the drum circumferential surface 32, and the drum rear 33 may be connected to the rear.

A plurality of holes may be formed in the drum circumferential surface 32. Water stored inside the tub 20 through the plurality of holes may flow into the drum 30, and clothing may be submerged in water. In the present invention, the water inside the tub 20 can be understood as the same as the water inside the drum 30.

The drum rear 33 can be positioned to face the drum front 31 and can be connected to the driving unit 50 at the rear. The drive shaft of the drive unit 50 may pass through the rear of the tub 20 and be coupled to the rear of the drum 33.

The driving unit 50 may generate power to rotate the drum 30. That is, the driving unit 50 can provide rotational force to the drum 30. The drive unit 50 may have a drive shaft directly coupled to the drum rear 33, or the drive shaft may be connected to a gear set, and a rotation shaft drawn from the gear set may be coupled to the drum rear 33 to transmit rotational force to the drum 30. there is.

Meanwhile, the tub 20 and the drum 30 may be provided at an angle so that the front end is located higher than the rear end. That is, the central axis that can be defined along the longitudinal direction of the tub 20 and the drum 30, that is, the rotation axis of the drum 30, can be defined to slope upward as it moves forward.

Accordingly, the lower end of the drum front 31 can be positioned above the lower end of the drum rear 33. The bottom of the front of the tub 20 may also be positioned above the bottom of the rear. Due to the inclined installation structure of the tub 20 and the drum 30, water stored in the tub 20 or clothing contained in the drum 30 leaks forward through the tub opening 25 and the drum opening 35. The situation can be contained.

Meanwhile, the gasket 100 may be provided between the front 12 of the cabinet 10 and the tub 20 to surround the inlet 15. The gasket 100 may have a sealing function to prevent water or clothing from leaking into the cabinet 10 through the tub opening 25.

The gasket 100 may have a substantially circular ring or cylindrical shape and may be disposed between the front 12 of the cabinet 10 and the front of the tub 20. The gasket 100 may be coupled to the front of the tub 20 or to the front 12 of the cabinet 10 inside the cabinet 10.

The hole defined by the gasket 100 may communicate with the inlet 15 and the tub opening 25. That is, when viewed from the front, a gasket 100 may be provided around the inlet 15 and the tub opening 25. The gasket 100 may include an injection unit 110, which will be described later.

Additionally, the gasket 100 may include a water removal unit 120. The water removal unit 120 is provided at the lower part of the gasket 100 and can discharge water present in the gasket 100 from the gasket 100. The water removal unit 120 may include a water removal pipe 125 in communication with the drain unit 70, and the water present in the gasket 100 passes through the water removal pipe 125 of the water removal unit 120. It may be delivered to the drainage unit 70.

The door 18 that opens and closes the inlet 15 may include a door window 19. The door window 19 may be made of a light-transmitting material so that the user can visually identify the inside of the cabinet 10 from the outside of the cabinet 10. At least a portion of the door window 19 may have a shape that protrudes into the interior of the cabinet 10.

The external communication pipe 28 may be connected to the top of the tub 20 and extend outside the cabinet 10. The inside of the tub 20 and the outside of the cabinet 10 are communicated through the external communication pipe 28 so that air can flow.

Meanwhile, an embodiment of the present invention may include a water supply unit 60. The water supply unit 60 can receive water by being connected to an external water supply source that supplies water from outside the cabinet 10. The water supply unit 60 can supply water delivered from an external water supply source to the detergent supply device 65 or the tub 20.

Figure 2 shows a structure in which the water supply unit 60 is connected to the detergent supply device 65 and supplies water to the detergent supply device 65 as an example of the present invention. The detergent supply device 65 can supply water supplied from the water supply unit 60 to the tub 20 along with detergent.

The water supply unit 60 may include a water supply valve 61 for controlling the flow of water supplied to the detergent supply device 65, and the detergent supply device 65 is connected to the tub 20 through the water supply pipe 66. It can be connected to supply water and detergent to the tub (20).

That is, the water supply unit 60 may include a water supply valve 61 for controlling the flow of water supplied to the tub 20, and the tub 20 may receive water through the water supply pipe 66.

Meanwhile, the water supply unit 60 may include a spray pipe 67. The injection pipe 67 may be connected to the injection unit 110 of the gasket 100 to provide a path through which water flows to the injection unit 110. The injection pipe 67 may be provided with an injection valve 62. The injection valve 62 may be provided to control the flow of water in the injection pipe 67, and thus, independent flows of water may occur in the injection pipe 67 and the water supply pipe 66.

One embodiment of the present invention may include a drain unit 70. The drain unit 70 is connected to the tub 20 and can discharge water existing in the tub 20 to the outside of the tub 20 . The drain unit 70 may include a drain pipe 72 connected to the tub 20 and a drain pump 71 connected to the drain pipe 72 to flow water.

The water inside the tub 20 can be discharged to the outside of the tub 20 when the drain pump 71 of the drain unit 70 is operated, and when the drain pump 71 is stopped, it is stored inside the tub 20. can be maintained as is.

Meanwhile, an embodiment of the present invention may include a control unit 200. The control unit 200 may be provided inside the cabinet 10, may be provided in plural as needed, and its location within the cabinet 10 may be determined in various ways.

The above-described control panel 80, water supply valve 61, injection valve 62, driving unit 50, and drain pump 71 are connected to the control unit 200 and their operating states are controlled by the control unit 200. It can be. Meanwhile, the control unit 200 can perform various courses for washing clothes while controlling the water supply unit 60, the drive unit 50, and the drain unit 70.

Meanwhile, Figure 3 conceptually illustrates the steps of the tub washing course (M1) according to an embodiment of the present invention. In one embodiment of the present invention, the tub washing course (M1) may include at least one of a laundry weight sensing stroke (M10), an emptying stroke (M20), a washing stroke (M30), and a dehydration stroke (M40).

Specifically, various courses may be stored in advance in the control unit 200, and each of the various courses may include one or more courses. The full washing course M1 may be stored in advance in the control unit 200.

The tub washing course (M1) is a course for washing the tub 20 and drum 30. That is, the control unit 200 may perform a full washing course (M1) to remove contaminants attached to the inner surface of the tub 20 and the surface of the drum 30.

The control unit 200 may perform the tub cleaning course (M1) based on a user's command signal through the control panel 80, and suggest the tub cleaning course (M1) to the user when a pre-stored condition is met. It may be possible.

The laundry weight detection process (M10) may be performed to measure the weight of clothing stored in the drum 30. The control unit 200 can measure the weight of the laundry in the drum 30 through the laundry weight detection stroke (M10) and perform subsequent strokes based on the measured weight.

Meanwhile, in the tub washing course M1, the control unit 200 may be configured to detect a no-load state in which no clothes are accommodated in the drum 30 through the laundry weight detection process M10. Here, the no-load state can be defined as a state in which no clothing is accommodated inside the drum 30, and may include a state in which no clothing is accommodated at all as well as a state in which a certain amount of clothing or less, which can be equated to no load, is accommodated.

The control unit 200 can measure the weight of laundry in various ways. For example, the tub 20 or the drum 30 may be equipped with a laundry weight sensor to detect the weight of the drum 30, and the control unit 200 controls the driving unit 50 to rotate the drum 30, The laundry weight can also be measured through the current value or voltage value measured from the driving unit 50 while the drum 30 is rotating.

The control unit 200 may determine the no-load state when the measurement value measured in the laundry weight detection process (M10) is less than or equal to the no-load reference value. Here, the measured values may be of various types. For example, it may be the sensing value of the aforementioned laundry weight sensor, or the current value or voltage value of the driver 50.

The no-load reference value is a value representing the no-load state described above, and can be defined as the same type of value as the above measurement value. As described above, it can be equated to a state in which no clothing exists at all as well as a state in which no clothing exists at all. It can be defined including the state in which a small amount of clothing is accepted.

When the full wash course (M1) is performed, the control unit 200 can determine whether it is in a no-load state through the laundry weight detection process (M10), and if it is determined that it is in a no-load condition, it can perform the remaining processes of the full wash course (M1). , if it is determined that it is not in a no-load state, the user can be notified or the full cleaning course (M1) can be stopped.

Meanwhile, Figure 4 conceptually illustrates administrations that may be included in the emptying administration (M20). In one embodiment of the present invention, the control unit 200 may perform an emptying process (M20) in the tub washing course (M1).

The execution order of each cycle of the washing course (M1) may vary. The emptying process (M20) may be performed after the laundry weight detection process (M10) and before the washing process (M30), which will be described later. The emptying process (M20) may include a water supply and drainage process (M21) and a tub rinsing process (M22), which will be described later.

If the control unit 200 determines that there is no load through the laundry weight detection process (M10), it can perform the emptying process (M20). The control unit 200 may perform an emptying operation (M20) to control the drain unit 70 so that the water inside the tub 20 is discharged.

The emptying process (M20) supplies water to the tub 20 and discharges water from the tub 20, thereby removing water or detergent that may remain in the tub 20. Of course, contaminants present in the tub 20 and the drum 30 can be removed during this process.

Meanwhile, Figure 5 shows a graph showing the operating status, water level (W), and RPM of the water supply valve 61, injection valve 62, and drain pump 71 in the emptying stroke (M20), and Figure 6 shows a graph showing the water level (W) and RPM. A graph showing the operating status of the water supply valve 61 and the drain pump 71 in the drain stroke (M21) is shown.

In graphs such as those shown in Figure 5, the horizontal axis represents time, and the vertical axis may have meaning depending on the value displayed on the graph. For example, the vertical axis means that the value increases as it moves upward, and as it moves down, it means that the value decreases. Therefore, in the case of water level (W) or RPM, it means that the value increases as it is recorded above the vertical axis, and as it is recorded below, it means that the value decreases.

Furthermore, the water supply valve 61, injection valve 62, and drain pump 71 can be expressed in two states, such as open and closed, or operating and stopped. For example, for each valve or pump, if the value on the graph is located relatively above, it means open or operating, and if it is located relatively below, it means closed or stopped.

Meanwhile, the emptying stroke (M20) may include a water supply and drainage stroke (M21). In Figure 7, the flow of water inside the cabinet 10 in the supply/drain stroke M21 is indicated by an arrow.

Referring to FIGS. 6 and 7, in the water supply/discharge process (M21), the control unit 200 controls the water supply unit 60 to supply water into the tub 20 and controls the drain unit 70. Thus, the water inside the tub 20 can be discharged.

In the water supply and drainage process (M21), detergents or contaminants remaining inside the tub 20 may be discharged to the outside of the tub 20 together with the water through the simultaneous water supply and drainage process. The operating status of each component in the water supply/drainage cycle (M21) is as follows.

First, when the water supply/drain cycle (M21) begins, the water supply valve 61 may be opened at the water supply start time (T1) preset in the control unit 200. That is, the control unit 200 can control the water supply unit 60 to supply water into the tub 20 at the water supply start time (T1).

After the water supply valve 61 is opened and water supply to the tub 20 begins, a predetermined time has elapsed and when the drainage start time (T2) preset in the control unit 200 is reached, the drain pump 71 is operated to drain the tub 20. The water can be discharged to the outside of the tub (20).

That is, in the water supply and discharge operation (M21), the control unit 200 controls the water supply unit 60 to start draining the tub 20 when a preset water supply maintenance time has elapsed after water supply to the tub 20 begins. And the drain unit 70 can be controlled.

Even after the drain start time (T2) in the water supply/drain cycle (M21), the water supply valve (61) is controlled in an open state so that water can be supplied into the tub (20). That is, in the water supply and drainage process M21, the tub 20 can supply water and drain water simultaneously.

In one embodiment of the present invention, the water supply start time (T1) is set a predetermined time before the drainage start time (T2), so that a certain amount of water is filled inside the tub 20 to create a state in which it is easy to discharge contaminants, detergents, etc. You can.

When a predetermined time has elapsed since the drain start time (T2), the control unit 200 can control the water supply valve 61 to be closed in accordance with the preset water supply end time (T3) and end water supply. After a predetermined time has elapsed, when it is deemed that all the water in the tub 20 has been discharged, the control unit 200 can stop the drain pump 71 at a preset drain end time (T4).

Meanwhile, in Figure 8, the operating status of the injection valve 62 and the drain pump 71 is displayed in the tub rinsing cycle (M22), and a graph showing the RPM of the drum 30 is shown. Additionally, in Figure 9, the flow of water in the tub rinsing process (M22) is indicated by an arrow.

Referring to Figures 8 and 9, in one embodiment of the present invention, the emptying stroke (M20) includes a tub rinsing stroke (M22), and in the tub rinsing stroke (M22), the control unit 200 operates the water supply unit. (60) is controlled to supply water into the tub 20, the drain unit 70 is controlled to discharge water inside the tub 20, and the drive unit 50 is controlled to control the drum ( 30) can be rotated.

The tub rinsing process (M22) may be an process for pre-cleaning contaminants that may exist inside the tub 20 prior to full-scale washing of the tub 20 and the drum 30. While the emptying stroke (M20) simply discharges contaminants through water supply and drainage, the tub rinsing stroke (M22) rotates the drum 30, which is advantageous for more active separation and discharge of contaminants.

Specifically, the gasket 100 may be provided with a water spray unit 110 that sprays water into the tub 20, and in the tub rinsing process (M22), the control unit 200 operates the water spray unit 110. ), the water supply unit 60 can be controlled to spray water into the tub 20.

The water spray unit 110 may be provided at approximately the upper end of the gasket 100 and may be provided to spray water from the upper end of the gasket 100 toward the inside of the drum 30. The above-described spray pipe 67 is connected to the water spray unit 110 and can deliver water to the water spray unit 110.

The water spray unit 110 can spray water into the drum 30 by increasing the hydraulic pressure of the water using a nozzle, etc. In the tub rinsing cycle (M22), water is provided in the form of a spray, which can be advantageous in removing contaminants present inside the drum 30.

During the process of supplying water through the water spray unit 110, the control unit 200 can control the driving unit 50 to rotate the drum 30. At this time, the RPM of the drum 30 may vary. The water spray direction of the water spray unit 110 is fixed, but as the drum 30 rotates, the entire inner peripheral surface of the drum 30 can receive water.

In the tub rinsing cycle (M22), the control unit 200 may control the driving unit 50 so that the rotating state and the stationary state of the drum 30 alternate. That is, the drum 30 can repeat rotation and stop by the driving unit 50 in the full rinse cycle (M22).

The rotation period and stop period of the drum 30 can be determined in various ways, and the number of repetitions can also be determined in various ways. The rotation direction of the drum 30 may change each time it rotates. For example, in the full rinse cycle M22, the first rotation of the drum 30 may be in the first direction, and the second rotation after stopping may be in the second direction opposite to the first direction. However, this can be determined in various ways depending on need.

In the tub rinsing process (M22), the control unit 200 may control the drain unit 70 to discharge water from the tub 20 in the stopped state of the drum 30. When the drum 30 is rotated, the water in the tub 20 is affected by the rotation of the drum 30 and can flow approximately parallel to the rotation direction of the drum 30 inside the tub 20, which is This may prevent water from flowing into the drain pipe 72, which may be located at the bottom of (20).

That is, the control unit 200 increases the rinsing effect of the drum 30 or the tub 20 by rotating the drum 30 in the tub rinsing stroke (M22) and stops the drum 30 to rinse the tub 20. Water can be discharged effectively. However, even if the drum 30 is stopped and drainage is performed during the barrel rinsing process (M22), the supply of water through the water spray unit 110 can be maintained.

Meanwhile, Figure 10 conceptually illustrates detailed processes included in the washing process (M30) according to an embodiment of the present invention. The clothing processing device 1 according to an embodiment of the present invention can perform a tub washing course (M1) for washing the tub 20 and the drum 30, and the tub washing course (M1) is a washing cycle. (M30) may be included.

The control unit 200 may control the driving unit 50 to perform a washing cycle (M30) of the drum 30 in an unloaded state in which no clothes are accommodated in the drum 30. The washing stroke (M30) may include at least one of a front washing stroke (M31) and a rear washing stroke (M32).

In Figure 11, the operating status of the water valve 61 and the drain pump 71 according to the washing stroke (M30) is displayed, and a graph showing the water level (W) of the tub 20 and the RPM of the drum 30 is shown. there is.

The water supply valve 61 may be opened before the front washing stroke (M31) is performed during the washing stroke (M30). That is, the control unit 200 can control the water supply unit 60 to supply water to the tub 20 before performing the front washing process (M31).

The water supply valve 61 may remain closed during the front washing stroke (M31) and the rear washing stroke (M32). However, in the washing stroke (M30), the front washing stroke (M31) and the rear washing stroke (M32) can be performed multiple times, and after performing the front washing stroke (M31) and the rear washing stroke (M32) once, the next two Before performing the front washing process (M31), the water supply valve 61 may be opened again to supply water to the tub 20.

The drain pump 71 is in a stopped state during water supply or the front washing stroke (M31), and then comes into operation during the rear washing stroke (M32) or after the rear washing stroke (M32) to discharge water from the tub 20. .

The water level (W) of the tub 20 may be higher in the rear washing stroke (M32) than in the front washing stroke (M31). Here, the water level (W) sensor that measures the water level (W) of the tub 20 measures the water level (W) based on the rear of the tub 20, so the water level (W) measurement result as shown in FIG. 11 was derived, but the specific Changes in the water level (W) of the tub 20 will be described later.

Meanwhile, FIG. 12 shows a graph specifically showing the RPM change during the front washing stroke (M31) and the rear washing stroke (M32) shown in FIG. 11.

The drum 30 may be rotated at a front washing RPM (R1) determined by the control unit 200 in at least some sections of the front washing stroke (M31), and the control unit 200 in at least some sections of the rear washing stroke (M32). ) can be rotated at the rear wash RPM (R2) determined by.

That is, the control unit 200 can control the driving unit 50 so that the drum 30 rotates at the front washing RPM (R1) in the front washing stroke (M31), and the drum 30 can be rotated at the front washing RPM (R1) in the rear washing stroke (M32). The driving unit 50 can be controlled to rotate at the rear washing RPM (R2).

The front wash RPM (R1) is an RPM for forming a front wash water flow, which will be described later, and the back wash RPM (R2) is lower than the front wash RPM (R1) and may correspond to an RPM at which a front wash water flow is not formed.

Meanwhile, Figure 13 shows the water level (W) of the tub 20 in a stopped state of the drum 30 before the front washing stroke (M31).

In the washing cycle (M30), the control unit 200 may control the water supply unit 60 so that the water level (W) in the stationary state of the drum 30 is higher than the lower end of the drum front 31. That is, the water surface of the tub 20, which corresponds to the stationary state of the drum 30 in the front washing stroke M31, may be positioned at least higher than the lower end of the drum front 31.

As described above, in one embodiment of the present invention, the drum 30 has the lower end of the drum front 31 provided with the drum opening 35 higher than the lower end of the drum rear 33 connected to the driving unit 50. It can be installed tilted so that it is positioned properly.

Accordingly, the lower end of the drum front 31 may be positioned higher than the lower end of the drum rear 33, and the water surface of the tub 20 may be positioned higher than the lower end of the drum front 31. Meanwhile, when the drum 30 is at rest, the water surface of the tub 20 may be parallel to the ground due to its own weight.

However, as described above, the drum 30 has a central axis inclined upward, and therefore the drum circumferential surface 32, which is inclined with respect to the ground, and the water surface of the tub 20 may not be parallel to each other. For example, the distance between the lower end of the drum front 31 and the water surface may be shorter than the distance between the lower end of the drum rear surface 33 and the water surface.

One embodiment of the present invention controls the water supply unit 60 so that the water level (W) of the tub 20 is higher than the lower end of the drum front 31, and rotates the drum 30 to effectively form a front washing water flow. You can.

The water level (W) of the tub 20 for forming the front washing water flow may be changed depending on the structural characteristics of the tub 20 or the drum 30, and may also be changed depending on the scheduled time of the washing stroke (M30). . A detailed explanation of the change in water flow according to the water level (W) of the tub 20 will be described later.

Meanwhile, Figure 14 shows the flow of water while the front washing process (M31) is performed according to an embodiment of the present invention.

The control unit 200 controls the driving unit 50 to rotate the drum 30 at the front washing RPM (R1) in the washing stroke (M30) so that the water in the tub 20 flows on the inner peripheral surface of the gasket 100. A front wash water flow that rotates along can be formed. For example, the control unit 200 may form the front wash water flow by rotating the drum 30 at the front wash RPM (R1) during the front wash stroke (M31).

Specifically, before the formation of the front washing water flow, that is, before the rotation of the drum 30, water at a water level (W) higher than the lower end of the drum front 31 may be stored in the tub 20. In addition, as described above, the drum circumferential surface 32 has an inclined shape with respect to the ground, but the water surface of the tub 20 is parallel to the ground.

However, when the drum 30 begins to rotate, the rotational force of the drum 30 acts on the water, and as a result, centrifugal force is generated in the water, so that the water surface gradually becomes closer to the drum circumference surface 32 or the circumference surface of the tub 20. They can be changed to be side by side.

The above change in water surface changes the water level (W) of the tub (20) based on the drum front (31). For example, as the water surface of the tub 20 gradually becomes parallel to the drum circumference surface 32, the water level (W) gradually lowers based on the rear of the tub 20, and the water level (W) relative to the front of the tub 20 ( W) gradually increases.

Meanwhile, as the RPM of the drum 30 increases, the slope of the water surface of the tub 20 gradually follows the slope of the drum circumference surface 32, and in this process, the water in the tub 20 has a forward force or a forward force. A directed water current may be formed.

Due to the increase in water level (W) based on the drum front (31) and the forward water flow generated inside the tub (20), the water inside the tub (20) can ultimately flow beyond the drum front (31). . Water flowing beyond the front of the drum 31 flows along the inner peripheral surface of the gasket 100 from the gasket 100 toward the tub opening 25, thereby cleaning the inner peripheral surface of the gasket 100 or the door 18. .

Meanwhile, the rotational force of the drum 30 may be transmitted to the water inside the tub 20 in contact with each other to form a rotational water flow. That is, the water inside the tub 20 may have a rotational property that flows along the rotational direction of the drum 30.

In one embodiment of the present invention, the front washing RPM (R1) of the drum 30 means that the water inside the tub 20 flows beyond the front of the drum 31 in a rotatable state, and the rotation direction of the drum 30 It may mean the RPM at which a front wash water flow rotating around the inner peripheral surface of the gasket 100 can be formed.

The front washing RPM (R1) may vary depending on the water level (W) inside the tub 20, the capacity of the drum 30 and the tub 20, the inclination angle of the drum 30, etc., and the water level inside the tub 20. (W) may be determined by the control unit 200 to correspond to the change.

For example, the front washing RPM (R1) may be set lower as the water level (W) stored in the tub 20 increases. As the water level (W) of the tub 20 increases, the force acting on the water at the same RPM may increase.

In addition, the higher the water level (W), the easier it is for the water inside the tub 20 to flow beyond the front of the drum 31 and into the gasket 100, and therefore the control unit 200 adjusts the water level (W) of the tub 20. The higher it is, the lower the front wash RPM (R1) can be set to form an effective front wash water flow.

Conversely, the front wash RPM (R1) can increase as the water level (W) of the tub 20 is lower, and even considering the lower water level (W1) to effectively form the front wash water flow as described above, several experiments were performed. As a result, the front wash RPM (R1) was confirmed to be at least 100 RPM or more, and accordingly, the control unit 200 can determine the front wash RPM (R1) to be 100 RPM or more. However, it goes without saying that the minimum value of the front washing RPM (R1) may vary depending on the capacity of the drum 30 and the tub 20, the inclination angle of the drum 30, etc.

Meanwhile, Figure 15 shows a schematic representation of the front wash water flow observed through the door window 19 from outside the cabinet 10.

In one embodiment of the present invention, the front wash water flow may rotate and flow along the inner circumferential surface of the gasket 100 from the lower portion of the inner circumferential surface of the gasket 100 beyond the lower portion of the drum front 31.

The front washing water flow that reaches the inner peripheral surface of the gasket 100 may be rotated along the inner peripheral surface of the gasket 100 so as to at least exceed the horizontal center line (L1) of the gasket 100. The horizontal center line (L1) refers to an imaginary line parallel to the ground passing through the center of the gasket 100, and the center of the gasket 100 may correspond to the geometric center of the hole defined by the inner peripheral surface of the gasket 100. there is.

In one embodiment of the present invention, the front washing water stream may flow along the inner peripheral surface of the gasket 100 while rotating at least 90 degrees, and through this, the inner peripheral surface of the gasket 100 as well as the inner surface of the door 18, such as Door windows (19), etc. can be cleaned effectively.

Additionally, in one embodiment of the present invention, the front wash water stream may fall from the inner peripheral surface of the gasket 100 before reaching the vertical center line L2 of the gasket 100. The vertical center line (L2) refers to an imaginary line that passes through the center of the gasket 100 and is perpendicular to the ground.

That is, in one embodiment of the present invention, the front wash water flow flowing into the lower side of the inner peripheral surface of the gasket 100 may rotate and flow less than 180 degrees based on the lower end of the vertical center line (L2).

When the front wash water flow reaches the top of the vertical center line (L2) of the gasket 100, a centrifugal force of more than 1G may already be applied to the water inside the tub 20, and a backflow of water may occur accordingly. The front wash RPM (R1) can be determined experimentally/statistically so that the front wash water flow falls before reaching the vertical center line (L2) while flowing along the inner peripheral surface of the gasket 100.

Meanwhile, Figure 16 shows the upper limit water level (W2) and lower limit water level (W1) for forming a front wash water flow in one embodiment of the present invention.

As described above, the lower limit water level (W1) of the tub (20) according to the stationary state of the drum (30) in the front washing stroke (M31) may correspond to the lower end of the drum front (31). That is, in the front washing stroke (M31), the water level (W) of the tub (20) may have a height higher than the bottom of the drum front (31). The lower end of the drum front 31 may be defined as the lower point P1 on the boundary line where the drum front 31 and the drum circumference surface 32 are in contact.

Specifically, the drum front 31 and the drum circumferential surface 32 may be integrally formed, or may be manufactured separately and joined to each other using a welding method, a hemming method, or the like. A boundary line may be defined between the drum front 31 and the drum circumferential surface 32, and the lower point P1 of the boundary line may correspond to the lower end of the drum front 31 described above.

The upper water level (W2) of the tub (20) may be set below the lower point (P2) of the drum opening (35). Therefore, the control unit 200 operates the water supply unit 60 so that the stationary water level (W) of the drum 30 is located below the lower end point (P2) of the drum opening 35 in the washing cycle (M30). Controlled clothing processing device (1).

16, the lower end point P2 of the drum opening 35 is indicated. The lower point (P2) of the drum opening (35) may correspond to the upper end of the portion located below the lower point (P2) of the drum opening (35) on the drum front (31). Alternatively, the upper water level (W2) of the tub 20 may be defined as below the lower end of the inner circumferential surface of the gasket 100.

That is, the control unit 200 controls the water supply unit 60 so that the stationary water level (W) of the drum 30 is located below the lower end of the inner peripheral surface of the gasket 100 in the washing stroke (M30). It may be possible.

Meanwhile, Figure 17 shows the drum 30 being rotated at the front washing RPM (R1) while the water level (W) of the tub (20) is below the lower limit water level (W1).

If the water level (W) of the tub (20) is less than the lower limit water level (W1) of the tub (20), which can be defined by the lower point (P1) on the boundary line of the drum front (31) and the drum circumferential surface (32), the drum Even if (30) is rotated at the front washing RPM (R1), the water inside the tub (20) may not exceed the drum front (31) and may not be provided to the inner peripheral surface of the gasket (100).

Specifically, when the water level (W) of the tub (20) is located below the lower point (P1) of the boundary line in a stationary state of the drum (30), the slope of the water surface changes due to the rotation of the drum (30) and the front The water flow flowing toward may be affected by the curved surface inside the drum 30 formed by the boundary line.

That is, the boundary line located above the water surface forms a bent surface inside the drum 30, and the bent surface prevents the forward water flow from passing the drum opening 35 and may scatter or flow backward.

Accordingly, the water inside the tub 20 does not reach the inner peripheral surface of the gasket 100, or a sufficient amount to form a front washing water flow is not provided to the inner peripheral surface of the gasket 100, or the water on the front of the drum 31 ), the kinetic energy may be reduced due to collision, etc., making it impossible to form a rotating water flow.

Therefore, in one embodiment of the present invention, the control unit 200 controls the stationary water level (W ) can be set to the bottom of the front of the drum (31) or higher.

Meanwhile, Figure 18 shows that the water level (W) of the tub 20 in the washing cycle (M30) exceeds the upper water limit (W2) in one embodiment of the present invention.

The upper water level (W2) can be defined by the lower point (P2) of the drum opening 35 described above, and when the water level (W) inside the tub 20 exceeds the upper water limit (W2), the gasket ( The lower part of the inner peripheral surface of the drum 30 may already be submerged in water even before the rotation of the drum 30, and accordingly, the water inside the tub 20 is unnecessarily removed from the drain part ( 70).

In addition, even if the water inside the tub 20 is not discharged by the water removal unit 120, if water at a water level (W) exceeding the upper water limit (W2) is stored in the tub (20), the drum (30) ) may be overloaded in the drive unit 50 in order to rotate it at the front washing RPM (R1).

Furthermore, the lower part of the inner peripheral surface of the gasket 100 may be an area into which the front washing water flow flows, and when the area is already submerged in water, the front is separated from the water inside the tub 20 and rotates independently due to the tension of the water. It is unfavorable to form a washing water stream.

Therefore, in one embodiment of the present invention, water is supplied to the inside of the tub 20 at a level (W) lower than the lower point (P2) of the drum opening (35) in the washing cycle (M30), thereby effectively flowing the front washing water. can be formed.

Meanwhile, Figure 19 shows a centrifugal force exceeding 1G acting on water in the front washing stroke (M31).

In one embodiment of the present invention, the water supply pipe 66 is connected to the top of the tub 20 and can guide water to the tub 20, and the front washing RPM (R1) is connected to the water inside the tub 20. The centrifugal force acting on can be set to be 1G or less.

That is, in one embodiment of the present invention, the control unit 200 may determine the front washing RPM (R1) so that the centrifugal force acting on the water inside the tub 20 is 1G or less. The front washing RPM (R1), which ensures that the centrifugal force acting on the water is 1G or less, can be determined experimentally/statistically and can be adjusted according to the water level (W) contained in the tub (20).

As described above, the water inside the tub 20 is affected by the rotation of the drum 30 and centrifugal force acts on it, and as a result, the water surface of the tub 20 can gradually slope parallel to the drum circumference surface 32. there is.

As the RPM of the drum 30 increases, the centrifugal force acting on the water also increases. As the centrifugal force increases, the height at which water rotates along the inner peripheral surface of the tub 20 may increase.

When the centrifugal force acting on water corresponds to 1G, the water inside the tub 20 does not fall due to gravity and can rotate and flow up to the top of the inner peripheral surface of the tub 20.

Meanwhile, in one embodiment of the present invention, a water supply pipe 66, an external communication pipe 28, etc. may be connected to the tub 20, and the water supply pipe 66 or the external communication pipe 28 may be connected to the tub 20 to prevent backflow of water. It can be connected to the top of (20).

However, if the centrifugal force acting on the water exceeds 1G, the water may move away from the rotation axis of the drum 30 even at the top of the tub 20, and thus the water supply pipe 66 connected to the top of the tub 20 or A phenomenon in which water flows back into the external communication pipe 28 may occur.

Accordingly, in one embodiment of the present invention, the control unit 200 determines the front washing RPM (R1) so that centrifugal force exceeding 1G is not generated in the water of the tub 20 and performs the front washing stroke (M31). there is.

Meanwhile, Figure 20 shows a graph showing the change in RPM of the drum 30 over time and the corresponding change in vibration amount in one embodiment of the present invention.

In the graph of FIG. 20, the recorded value located relatively above indicates the RPM of the drum 30, and the recorded value located below indicates the amount of vibration. The amount of vibration is a value measured based on the driving unit 50, which generates the greatest amount of vibration inside the cabinet 10.

The operation of the driving unit 50 and the rotation of the drum 30 may cause vibration, and this vibration may be transmitted to the outside of the cabinet 10, causing discomfort to the user or promoting the progress of durability for various configurations. .

Furthermore, the amount of vibration is greatly increased at a specific RPM due to the physical characteristics of the drum 30 and the tub 20 or the amount of water or clothing contained therein, and the specific RPM can be understood as the RPM corresponding to the resonant frequency. You can.

That is, as the RPM of the drum 30 is the same as or close to the resonance frequency or the RPM corresponding to the resonance frequency, the amount of vibration increases, which is disadvantageous. Accordingly, in one embodiment of the present invention, the control unit 200 performs front washing. RPM (R1) may be determined to be different from the resonance frequency or the RPM corresponding to the resonance frequency.

The graph of FIG. 20 shows the front wash RPM (R1) set differently from the RPM corresponding to the resonance frequency as an example of the present invention. Specifically, the resonance RPM (R4) corresponding to the resonance frequency can be determined based on the inflection point where the amount of vibration increases and then decreases, and the front wash RPM (R1) can be set to have a possible difference from the resonance RPM (R4). .

Meanwhile, the resonance RPM (R4) can be identified as a plurality, and the front wash RPM (R1) can also be set to a plurality of values to avoid the plurality of resonance RPM (R4). The control unit 200 may select one value among the plurality of front washing RPMs (R1) based on the water level (W) inside the tub 20.

Figure 21 is a diagram showing the flow of water according to the rear washing stroke (M32) in one embodiment of the present invention.

In one embodiment of the present invention, the washing stroke (M30) includes a front washing stroke (M31) and a rear washing stroke (M32), and the control unit 200 controls the drum 30 in the front washing stroke (M31). may be rotated at the front washing RPM (R1), and the drum 30 may be rotated at a rear washing RPM (R2) lower than the front washing RPM (R1) in the rear washing stroke (M32).

In the case of the front washing stroke (M31), water can flow to the inner peripheral surface of the gasket 100 through a change in the water level (W) of the tub 20 using a relatively high RPM. On the other hand, in the case of the rear washing stroke (M32), the change in water level (W) of the tub 20 is reduced by using a relatively low RPM, and thus water can be prevented from flowing to the inner peripheral surface of the gasket 100.

That is, in the front washing stroke (M31), the water in the tub 20 flows along the inner peripheral surface of the gasket 100, and in the rear washing stroke (M32), the water in the tub 20 flows through the gasket 100. ) can be located posterior to the

In the rear washing stroke (M32), the degree to which the water surface of the tub (20) follows the slope of the drum circumference surface (32) is lower than that in the front washing stroke (M31), and therefore, the rear surface of the drum (33) or the rear of the tub (20) is lower. As a standard, the water level (W) of the tub (20) is higher than the front washing stroke (M31). That is, the water level (W) of the tub (20) based on the drum rear surface (33) may be higher in the rear washing stroke (M32) than in the front washing stroke (M31).

Therefore, in the rear washing stroke (M32), the area where the water of the tub 20 is in contact with the drum rear 33 or the rear of the tub 20 can be increased compared to the front washing stroke (M31), and accordingly, the area of the tub 20 is in contact with the rear washing stroke M31. In one embodiment, the rear of the drum 33 and the rear of the tub 20 can be effectively cleaned through the rear washing stroke (M32).

Meanwhile, in one embodiment of the present invention, drainage of the tub 20 may not occur during the front washing stroke (M31), and drainage of the tub 20 may occur during the rear washing stroke (M32). That is, the control unit 200 operates the drain unit 70 so that the water in the tub 20 is not drained in the front washing stroke (M31) and the water in the tub 20 is drained in the rear washing stroke (M32). ) can be controlled.

In the relationship between the front wash RPM (R1) and the rear wash RPM (R2), the front wash RPM (R1) corresponds to high RPM, and the rear wash RPM (R2) corresponds to low RPM. The higher the RPM of the drum 30, the more disadvantageous it is to the process of discharging water through the hole. Therefore, in one embodiment of the present invention, the water drainage process is performed in the front washing stroke (M31) in which the drum 30 is rotated at a high RPM. In the rear washing stroke (M32), in which the drum 30 is rotated at a low RPM, efficient discharge of water can be achieved by performing a water drainage process.

In other words, in one embodiment of the present invention, in the washing cycle (M30), the control unit 200 prevents water from being discharged from the tub 20 while the drum 30 is rotated at the first RPM. The drain unit 70 may be controlled to discharge water from the tub 20 while the drum 30 is rotated at a second RPM that is lower than the first RPM.

Here, the first RPM may correspond to the front washing RPM (R1) described above, and the second RPM may correspond to the rear washing RPM (R2) described above. The state in which the drum 30 is rotated at the first RPM may correspond to the front washing stroke (M31), and the state in which the drum 30 is rotated at the second RPM may correspond to the rear washing stroke (M32).

That is, in one embodiment of the present invention, the control unit 200 supplies water to the tub 20 when the drum 30 is stopped, and supplies water before the drum 30 rotates at the first RPM. This stops, and the driving unit 50, the water supply unit 60, and the drain unit 70 are controlled to discharge water from the tub 20 while the drum 30 is rotated at the second RPM. You can.

In addition, when the drum 30 is rotated at the first RPM, the water in the tub 20 is rotated along the inner peripheral surface of the gasket 100, and when the drum 30 is rotated at the second RPM, the water in the tub 20 is rotated along the inner peripheral surface of the gasket 100. The water in (20) may be located rearward of the gasket (100).

Furthermore, before the washing process, the control unit 200 controls the water supply unit 60 to supply water to the tub 20 and controls the drain unit 70 to supply water to the tub 20 as described above. An emptying process (M20) can be performed to discharge water.

In the emptying stroke (M20), the control unit 200 may control the driving unit 50 to rotate the drum 30 at a lower RPM than the first RPM in at least some sections. In other words, the RPM in the tub rinsing stroke (M22) in which the drum 30 rotates during the emptying stroke (M20) may be lower than the aforementioned front washing RPM (R1) and, if necessary, lower than the rear washing RPM (R2). .

Meanwhile, after the washing stroke (M30), the control unit 200 rotates the drum 30 at a dehydration RPM (R3) higher than the front washing RPM (R1) and discharges water out of the tub 20. The dehydration process (M40) can be performed.

The dehydration RPM (R3) in the dehydration stroke (M40) may correspond to the highest RPM in the entire wash course (M1). In one embodiment of the present invention, the drum 30 is rotated at the dehydration RPM (R3) and the drain pump 71 is operated so as to sufficiently remove the water remaining inside the tub 20 after the washing cycle (M30). The dehydration process (M40) can be performed by controlling with .

For reference, in the dehydration process (M40), substantially all of the water inside the tub 20 has already been discharged, so the water inside the tub 20 and the drum circumference surface 32 are not in constant contact. It is difficult to form a rotating water flow, so the disadvantage of water discharge occurring at high RPM can be ignored.

Meanwhile, Figure 22 shows the operational relationship between the water supply valve 61, the injection valve 62, and the drain pump 71 for the tub washing course (M1) in the laundry treatment device 1 according to an embodiment of the present invention. A graph showing changes in water level (W) and RPM of the drum 30 is shown.

The water supply valve 61 may be opened during the supply/drain stroke (M21) during the emptying stroke (M20), and may be opened before performing the front wash stroke (M31) during the cleaning stroke (M30). In other processes, the water supply valve 61 may be closed and water may not be supplied into the tub 20.

The injection valve 62 may be opened during the tub rinsing stroke (M22) among the emptying strokes (M20), and may be closed during other processes, preventing water from being sprayed through the spray unit 110.

The drain pump 71 can be controlled to operate in the supply/drain stroke (M21) during the emptying stroke (M20), can be operated in a stopped state of the drum 30 during the tub rinsing stroke (M22), and can be operated in a stopped state during the washing stroke (M22). It can be operated during the rear washing stroke (M32) of the M30), and it can be operated during the dehydration stroke (M40). That is, the drain pump 71 may be operated in a state in which the drum 30 is stationary or at a low RPM, or in a state in which substantially all of the water inside the tub 20 has been discharged regardless of the rotation of the drum 30.

The water level (W) of the tub 20 generally increases when water is supplied, and generally decreases when drainage occurs. In particular, it can be reduced by a change in the slope of the water surface in the front washing stroke (M31) and in the rear washing stroke (M32). can be increased again.

The drum 30 can be rotated to alternate between a rotating state and a stationary state in the tub rinsing stroke (M22) during the emptying stroke (M20), and can be rotated in the front washing stroke (M31) and the rear washing stroke (M32). It can be rotated in the dehydration stroke (M40).

The RPM of the drum 30 may be highest at the dehydration RPM (R3) in the dehydration stroke (M40), and gradually decreases in the order of RPM in the front washing RPM (R1), rear washing RPM (R2), and tub rinsing stroke (M22). It can be lowered.

Meanwhile, Figure 23 shows a flowchart showing a control method of a clothing treatment device according to an embodiment of the present invention. Hereinafter, a control method of a laundry treatment device according to an embodiment of the present invention will be described with reference to FIG. 23, but duplicate descriptions of parts already described for the laundry treatment device 1 will be omitted as much as possible.

First, the laundry treatment device 1 includes a cabinet 10 provided with an inlet 15 at the front, a tub 20 provided inside the cabinet 10 to store water, and the cabinet 10 of the cabinet 10. A gasket 100 provided between the front and the tub 20 and surrounding the inlet 15, a drum 30 rotatably provided inside the tub 20 to accommodate clothes, and the drum ( It includes a driving unit 50 connected to the drum 30 to rotate the drum 30, and a control unit 200 controlling the driving unit 50, wherein the drum 30 is connected to the drum 30 through the drum opening. The lower end of the drum front 31 provided with (35) may be installed at an angle so that it is positioned higher than the lower end of the drum rear 33 connected to the driving unit 50.

Meanwhile, the control method of the clothing treatment apparatus according to an embodiment of the present invention may include a laundry weight detection process performing step (S100).

In the laundry weight detection operation step (S100), the control unit 200 may determine a no-load state in which no clothing is inserted into the drum 30. The control unit 200 can determine the amount of clothing loaded into the drum 30 based on changes in current or voltage generated in the driving unit 50 while rotating the drum 30 at a preset RPM.

Meanwhile, an embodiment of the present invention may include an emptying process performance step (S200). Before the washing operation step (S300), in the emptying operation step (S200), the control unit 200 controls the water supply unit 60 connected to the tub 20 to supply water to the tub 20. Water from the tub 20 can be discharged by controlling the drain unit 70 connected to the tub 20.

Through the emptying process step (S200), the control unit 200 can discharge residual detergent present inside the tub 20 to the outside of the tub 20. The emptying process performance step (S200) may include at least one of a water supply/drainage process process (S210) and a tub rinsing process process (S220).

In the water supply/drain stroke performance process (S210), the control unit 200 may perform the water supply/drain stroke (M21) described above, and in the water/drain cycle (M22), the control unit 200 may perform the water/drain cycle (M22) described above. It can be done.

Meanwhile, an embodiment of the present invention may include a washing process performance step (S300). If it is determined to be in the no-load state in the laundry weight sensing stroke performance step (S100), the control unit 200 controls the driving unit 50 in the washing stroke performance step (S300) to perform the preset front washing of the drum 30. By rotating at RPM (R1), the water in the tub 20 can form a front washing water flow that rotates along the inner peripheral surface of the gasket 100.

The washing stroke performing step (S300) may include a front washing stroke performing process (S310) and a rear washing stroke performing process (M30).

In the front washing process (S310), the control unit 200 controls the water supply unit 60 connected to the tub 20 to supply water to the tub 20, and then controls the drive unit 50. Thus, the drum 30 can be rotated at the front washing RPM (R1).

After the front washing process (S310), in the rear washing process (S320), the control unit 200 controls the drain unit 70 connected to the tub 20 to discharge water from the tub 20. While controlling the driving unit 50, the drum 30 can be rotated at a rear washing RPM (R2) that is lower than the front washing RPM (R1).

One embodiment of the present invention may include a dehydration process (S400), and in the dehydration process (S400), the control unit 200 may perform the dehydration process (M40) described above.

Although the present invention has been shown and described in relation to specific embodiments, it is known in the art that the present invention can be modified and changed in various ways without departing from the technical spirit of the invention as provided by the following claims. It will be self-evident to those with ordinary knowledge.

1: Clothing processing device 10: Cabinet
12: Front 15: Inlet
18: door 19: door window
20: Tub 25: Tub opening
28: external communication pipe 30: drum
31: front of drum 32: drum circumference
33: Drum rear 35: Drum opening
50: driving unit 60: water supply unit
61: water supply valve 62: injection valve
65: detergent supply device 66: water supply pipe
67: injection pipe 70: drain part
71: drain pump 72: drain pipe
80: Control panel 100: Gasket
110: injection unit 120: water removal rejection
125: water removal pipe 200: control unit
S100: Weight detection operation step S200: Emptying administration step
S210: Water supply and drainage process performance S220: Tub rinsing process performance process
S300: Washing stroke performance step S310: Front washing stroke execution process
S320: Rear washing stroke performance step S400: Dehydration stroke execution step

Claims (30)

A cabinet with an input slot on the front;
a tub provided inside the cabinet to store water;
a gasket provided between the front of the cabinet and the tub and surrounding the inlet;
a drum rotatably installed inside the tub to accommodate clothing and having a drum opening facing the input port;
A driving unit connected to the drum to rotate the drum;
a water supply unit connected to an external water supply source to provide water to the tub; and
A control unit that controls the drive unit to perform a washing cycle of the drum in an unloaded state in which no clothes are accommodated in the drum,
The drum is installed at an angle so that the lower end of the front of the drum provided with the drum opening is positioned higher than the lower end of the rear of the drum connected to the driving unit,
In the washing cycle, the control unit controls the water supply unit so that the water level in the stationary state of the drum is higher than the bottom of the front of the drum, and controls the driving unit so that the drum rotates at the front washing RPM so that the water in the tub flows into the gasket. A clothing treatment device that forms a front washing water flow that rotates along the inner circumferential surface of the. According to paragraph 1,
A clothing treatment device in which the front washing water flow is rotated along the inner peripheral surface of the gasket so as to exceed the horizontal center line of the gasket. According to paragraph 1,
The clothing treatment device wherein the front washing water flow falls from the inner peripheral surface of the gasket before reaching the vertical center line of the gasket. According to paragraph 1,
The front wash RPM is set lower as the level of water stored in the tub rises. According to paragraph 1,
The front washing RPM is a clothing processing device corresponding to 100 RPM or more. According to paragraph 1,
It further includes a water supply pipe connected to the top of the tub and guiding water to the tub,
The front wash RPM is set so that the centrifugal force acting on the water inside the tub is 1G or less. According to paragraph 1,
The front washing RPM is set to be different from the resonance frequency formed by the driving unit. According to paragraph 1,
The laundry treatment device wherein the control unit controls the water supply unit so that the water level in the stationary state of the drum is located below the lower end of the drum opening during the washing cycle. According to paragraph 1,
The clothes treatment device wherein the control unit controls the water supply unit so that the water level in the stationary state of the drum is located below the lower end of the inner circumferential surface of the gasket during the washing cycle. According to paragraph 1,
The washing stroke includes a front washing stroke and a rear washing stroke,
The control unit rotates the drum at the front wash RPM in the front wash stroke, and rotates the drum at a rear wash RPM lower than the front wash RPM in the rear wash stroke. According to clause 10,
In the front washing stroke, the water in the tub flows along the inner peripheral surface of the gasket, and in the rear washing stroke, the water in the tub is located rearward of the gasket. According to clause 10,
The drum includes a rear drum facing the front of the drum,
The clothes processing device wherein, based on the rear of the drum, the water level in the tub is higher in the rear washing stroke than in the front washing stroke. According to clause 10,
It further includes a drain connected to the tub and discharging water from the tub to the outside of the cabinet,
The control unit controls the drain unit so that water from the tub is not drained during the front wash cycle and water from the tub is drained during the rear wash cycle. According to paragraph 1,
Before the washing cycle, the control unit rotates the driving unit so that the drum rotates and performs a laundry weight detection process to detect the no-load state. According to paragraph 1,
It further includes a drain connected to the tub and discharging water from the tub to the outside of the cabinet,
Before the washing cycle, the control unit performs an emptying cycle to control the drain unit so that water inside the tub is discharged. According to clause 15,
The emptying process includes a supply and drainage process,
In the water supply and discharge process, the controller controls the water supply unit to supply water into the tub and controls the drain unit to discharge water from the tub. According to clause 16,
In the water supply and drainage process, the controller controls the water supply unit and the drain unit to start draining the tub when a preset water supply maintenance time has elapsed after water supply to the tub starts. According to clause 15,
The emptying process includes a tub rinsing process,
In the tub rinsing cycle, the controller controls the water supply unit to supply water into the tub, controls the drain unit to discharge water inside the tub, and controls the drive unit to rotate the drum. . According to clause 18,
The gasket is provided with a water spray unit that sprays water into the tub,
In the tub rinsing cycle, the control unit controls the water supply unit to spray water into the tub through the water spray unit. According to clause 18,
In the tub rinsing cycle, the control unit controls the driving unit to alternate between a rotational state and a stationary state of the drum. According to clause 20,
In the tub rinsing cycle, the control unit controls the drain unit to discharge water from the tub in the stopped state of the drum. According to paragraph 1,
After the washing stroke, the control unit rotates the drum at a spin-drying RPM higher than the front washing RPM and performs a spin-drying stroke to discharge water out of the tub. A cabinet with an input slot on the front;
a tub provided inside the cabinet to store water;
a drum rotatably provided inside the tub to accommodate clothing;
A driving unit connected to the drum to rotate the drum;
a drain connected to the tub to discharge water from the tub; and
A control unit that controls the drive unit to perform a washing cycle of the drum in an unloaded state in which no clothes are accommodated in the drum,
In the washing cycle, the control unit controls the drain unit so that water from the tub is not discharged when the drum is rotated at a first RPM, and the control unit controls the drain unit to prevent water from being discharged from the tub when the drum is rotated at a second RPM lower than the first RPM. A clothing treatment device that controls the drain unit to discharge water. According to clause 23,
It further includes a water supply unit connected to an external water supply source and providing water to the tub,
The control unit supplies water to the tub when the drum is stopped, stops supplying water before the drum rotates at the first RPM, and discharges water from the tub when the drum rotates at the second RPM. A clothing treatment device that controls the driving unit, the water supply unit, and the drain unit as much as possible. According to clause 23,
It further includes a gasket provided between the front of the cabinet and the tub and surrounding the inlet,
When the drum is rotated at a first RPM, the water in the tub rotates along the inner peripheral surface of the gasket, and when the drum is rotated at a second RPM, the water in the tub is located rearward of the gasket. According to clause 23,
It further includes a water supply unit connected to an external water supply source and providing water to the tub,
Before the washing cycle, the control unit controls the water supply unit to supply water to the tub and controls the drain unit to perform an emptying process to discharge water from the tub. According to clause 26,
In the emptying stroke, the controller controls the driving unit in at least some sections to rotate the drum at a lower RPM than the first RPM. A cabinet provided with an inlet at the front, a tub provided inside the cabinet to store water, a gasket provided between the front of the cabinet and the tub and surrounding the inlet, and rotatable inside the tub. It includes a drum accommodating clothes, a driving part connected to the drum to rotate the drum, and a control part controlling the driving part, wherein the drum has a lower end of the front of the drum provided with the drum opening and the driving part. In the control method of a clothing processing device installed at an angle so as to be positioned higher than the lower end of the rear of the connected drum,
A laundry weight detection operation step in which the control unit determines a no-load state in which no clothing is inserted into the drum; and
When the no-load state is determined in the laundry weight detection stroke performance step, the control unit controls the driving unit to rotate the drum at a preset front wash RPM, so that the front wash water flow rotates along the inner peripheral surface of the gasket of the water in the tub. A control method of a clothing treatment device comprising: performing a washing operation to form a . According to clause 28,
The washing process step is,
A front washing stroke performance process in which the control unit controls a water supply unit connected to the tub to supply water to the tub, and then controls the driving unit to rotate the drum at the front washing RPM; and
After performing the front washing stroke, the control unit controls the drain connected to the tub to discharge water from the tub and controls the driving unit to rotate the drum at a rear washing RPM lower than the front washing RPM. A control method of a clothing processing device including a process. According to clause 28,
Before performing the washing stroke, the controller controls a water supply unit connected to the tub to supply water to the tub, and controls a drain connected to the tub to discharge water from the tub. Control method for clothing processing equipment.

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