KR102487868B1 - Washing machine and Controlling method for the same - Google Patents

Abstract

The present invention relates to a washing machine with improved washing performance while reducing energy use, and a control method thereof. A method for controlling a washing machine according to an embodiment of the present invention includes an initial water supply step of spraying wash water into a drum through a spray nozzle while rotating a drum; A wetting step, a drainage step in which the pump drains wash water in the tub to the outside, and a main water supply step in which wash water mixed with detergent is supplied into the drum through a front water supply pipe while rotating the drum.

Description

Washing machine and its control method {Washing machine and Controlling method for the same}

The present invention relates to a washing machine and a control method thereof, and more particularly, to a washing machine having improved washing performance while reducing energy use, and a control method thereof.

In general, a washing machine is a device that cleans clothes, bedding, etc. (hereinafter referred to as 'cloth') through processes such as washing, rinsing, and dehydration using water, detergent, and mechanical action.

Washing machines are largely classified into agitator type, pulsator type, and drum type washing machines.

The agitation type rotates the washing rod at the center of the tub to the left and right to wash, and the vortex type rotates the disc-shaped rotary blades formed at the bottom of the tub to the left and right to wash using the water flow and the frictional force between the cloths. Wash by adding water, detergent and cloth and rotating the drum.

In a drum type washing machine, a tub accommodating wash water is mounted inside a cabinet forming an exterior, a drum accommodating fabric is disposed inside the tub, a driving unit for rotating the drum is mounted on the rear side of the tub, and a tub is installed on the driving unit. A drive shaft connected to the back side of the drum is built through. A lifter is installed inside the drum to lift the cloth when the drum rotates.

Such a drum-type washing machine is required to improve washing performance while reducing energy consumption.

An object of the present invention is to provide a washing machine with improved washing performance while reducing energy use and a control method thereof.

Another object of the present invention is to provide a washing machine and a control method thereof in which water supply is reduced and the foaming feeling is enhanced.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a washing machine according to an embodiment of the present invention includes a tub accommodating wash water; a drum rotatably disposed in the tub and accommodating cloth; a lifter disposed within the drum and receiving and spraying wash water in the tub according to rotation of the drum; a driving unit rotating the drum; a pump draining wash water in the tub to the outside; a water supply unit controlling the inflow of washing water from an external water source; a detergent box in which detergent is accommodated and the washing water supplied from the water supply unit is mixed with the detergent; a front water supply pipe supplying wash water mixed with detergent from the detergent box into the drum from the front of the drum; a spray nozzle for spraying wash water supplied from the water supply unit into the drum; and a control unit controlling the driving unit, the water supply unit, and the pump, wherein the control unit drives the driving unit to rotate the drum and controls the water supply unit to spray wash water into the drum through the spray nozzle. and performing an initial water supplying step of controlling the water supply unit to stop spraying of wash water, and then rotating the drum by driving the drive unit so that the lifter receives and sprays wash water in the tub. and performing a drainage step of draining wash water in the tub to the outside by driving the pump, rotating the drum by driving the driving unit and controlling the water supply unit to mix detergent into the drum through the front water supply pipe. The main water supply step of supplying the washed water is performed.

In order to achieve the above object, a control method of a washing machine according to an embodiment of the present invention includes a tub for receiving wash water, a drum disposed in the tub for accommodating and rotating fabric, and a drum disposed in the drum and configured to rotate. A lifter that receives and sprinkles the wash water in the tub as it rotates, a driving unit that rotates the drum, a pump that drains the wash water in the tub to the outside, and a detergent that is accommodated in the wash water supplied from an external water source. a detergent box mixed with detergent, a front water supply pipe supplying wash water mixed with detergent from the detergent box into the drum from the front of the drum, and a spray nozzle spraying wash water supplied from an external water source into the drum A control method of a washing machine comprising: an initial water supply step of spraying wash water into the drum through the spray nozzle while rotating the drum; a step of spraying after the lifter receives the wash water in the tub by rotating the drum; a drainage step in which the pump drains the wash water in the tub to the outside; and a main water supply step of supplying wash water mixed with detergent into the drum through the front water supply pipe while rotating the drum.

Details of other embodiments are included in the detailed description and drawings.

According to the washing machine and the control method of the present invention, one or more of the following effects are provided.

First, there is an advantage of reducing energy consumption by draining the water supplied for wetting and then performing washing with a small amount of the water supplied again.

Second, there is an advantage of reducing energy consumption by removing the circulation pump and circulating the wash water with a lifter.

Third, there is also an advantage in that the washing water is sprayed from the front of the drum toward the fabric, and then the wetness is strengthened by rapidly rotating the drum during drainage.

Fourth, the washing performance is improved by rapidly rotating the drum and dropping the washing water mixed with the detergent into the fabric sufficiently wetted.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is an exploded perspective view of a washing machine according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of the washing machine shown in FIG. 1 .
3 is a partial perspective view of the washing machine shown in FIG. 1;
4 is a partial cross-sectional view of the washing machine shown in FIG. 1;
5 is a block diagram of a washing machine according to an embodiment of the present invention.
6 is a diagram illustrating a control method of a washing machine according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Hereinafter, the present invention will be described with reference to drawings for explaining a washing machine according to embodiments of the present invention.

1 is an exploded perspective view of a washing machine according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view of the washing machine shown in FIG. 1, FIG. 3 is a partial perspective view of the washing machine shown in FIG. 1, and FIG. is a partial cross-sectional view of the washing machine shown in FIG.

A washing machine according to an embodiment of the present invention includes a cabinet 10 forming an exterior, a tub 20 accommodating wash water, and a drum 30 rotatably disposed in the tub 20 and accommodating fabric. and a lifter 35 disposed in the drum 30 and receiving and spraying wash water in the tub 20 according to the rotation of the drum 30, a drive unit 40 rotating the drum 30, and a tub A pump 73 for draining wash water inside the 20 to the outside, a water supply unit 50 for controlling the inflow of wash water from an external water source (C.W), and washing detergent supplied from the water supply unit 50 while receiving the detergent. A detergent box 60 in which water is mixed with detergent, a front water supply pipe 130 supplying wash water passing through the detergent box 60 into the drum from the front of the drum, and wash water passing through the detergent box 60 An auxiliary water supply pipe 140 for supplying water into the tub 20, a spray nozzle 90 for injecting wash water supplied from the water supply unit 50 into the drum 30, and provided in the tub 20 to heat the wash water and a controller 100 that controls the heater 80, the driving unit 40, the water supply unit 50, the pump 73, and the heater 80.

The cabinet 10 forms the exterior of the washing machine. A tub 20 is provided inside the cabinet 10 . A front side of the cabinet 10 is formed with a cloth entrance hole 12 to allow cloth to enter and exit. A front surface of the cabinet 10 is provided with a door 15 rotatably capable of opening and closing the cloth entrance and exit holes 12 .

The cabinet 10 includes a control panel 13 that receives commands from a user and displays various status information of the washing machine. The cabinet 10 includes a detergent box 60 in which detergent is accommodated so as to be withdrawable.

The gasket 25 is provided between the tub 20 and the cabinet 10 to seal the tub 20 and the cabinet 10 . The gasket 25 is disposed between the inlet of the tub 20 and the cloth entrance hole 12 . The gasket 25 mitigates shock transmitted to the door 15 when the drum 30 rotates, and at the same time prevents the wash water in the tub 20 from leaking to the outside. The door 15 is in close contact with the gasket 25 . A portion of the door 15 is partially inserted into the gasket 25 side. The gasket 25 is provided with a spray nozzle 90 for introducing wash water into the drum 30, and is connected to a front water supply pipe 130.

The tub 20 is disposed inside the cabinet 10 to be buffered by a spring (not shown) and a damper (not shown). The tub 20 accommodates wash water. A drum 30 is rotatably disposed inside the tub 20 .

The tub 20 may be provided with a water level sensor 72 for detecting the water level of wash water accommodated in the tub. The water level sensor 72 can be implemented in a variety of ways. In this embodiment, the gap between the electrodes is changed using air pressure that changes according to the washing water level, and the water level is measured by the change in capacitance of the electrodes. A heater 80 for heating wash water is provided inside the tub 20 .

The drum 30 receives the fabric and rotates. The drum 30 is formed with a plurality of through holes through which washing water passes. A lifter 35 may be disposed on an inner wall of the drum 30 to lift the cloth to a predetermined height when the drum 30 rotates. The drum 30 rotates by receiving rotational force from the drive unit 40 . The drum 30 is not disposed completely horizontally, but may be disposed to have a predetermined inclination such that the rear portion of the drum 30 descends below the horizontal level.

The drive unit 40 rotates the drum 30 . The driving unit 40 may rotate the drum 30 at various rotational speeds or directions. The driving unit 40 may include a motor, a switching element for controlling the motor, and a clutch. The drive unit 40 may include a sensor that measures the actual rotational speed of the drum 30 .

The detergent box 60 accommodates detergents such as pre-washing detergent, laundry detergent, rinsing detergent, or bleach. The detergent box 60 is preferably provided on the front of the cabinet 10 to be withdrawable. The detergent box 60 may be formed by dividing a portion containing detergent for pre-washing, a portion containing laundry detergent, a portion containing rinsing detergent, and a portion containing bleach. In the detergent box 60, wash water supplied from the water supply unit 50 is mixed with detergent such as pre-wash detergent, laundry detergent, rinse detergent, or bleach.

The detergent box 60 is connected to the front water supply pipe 130 and the auxiliary water supply pipe 140, so that washing water passing through the detergent box 60 flows to the front water supply pipe 130 or the auxiliary water supply pipe 140. Inside the detergent box 60, a flow path through which wash water flows according to the operation of the water supply unit 50 is divided, and the wash water passing through the portion where each detergent is accommodated is passed through the front water supply pipe 130 or the auxiliary water supply pipe 140. ) to flow.

The front water supply pipe 130 is connected to the gasket 25 to supply wash water passing through the detergent box 60 from the front of the drum 30 into the drum 30 . The front water supply pipe 130 supplies wash water mixed with detergent in the detergent box 60 from the front of the drum 30 into the drum 30 . According to the embodiment, the front water supply pipe 130 may be connected to the front of the tub 20 . The wash water supplied through the front water supply pipe 130 is supplied into the drum 30 and directly falls on the fabric.

The auxiliary water supply pipe 140 is connected to the side of the tub 20 and supplies wash water passing through the detergent box 60 into the tub 20 . The auxiliary water supply pipe 140 supplies wash water mixed with detergent from the detergent box 60 into the tub 20 .

The wash water supplied through the auxiliary water supply pipe 140 flows along the inner surface of the tub 20 and is received under the tub 20 . Since the wash water supplied through the auxiliary water supply pipe 140 is supplied to the tub 20 through a gap between the tub 20 and the drum 30, it does not fall directly onto the fabric.

Depending on the embodiment, the auxiliary water supply pipe 140 may be connected to the rear of the tub 20 so that wash water may be supplied into the tub 20 along the rear surface of the tub 20 .

The spray nozzle 90 sprays the wash water supplied from the external water source C.W into the drum 30 according to the operation of the water supply unit 50 . The spray nozzle 90 is directly connected to the water supply unit 50 and sprays wash water not mixed with detergent into the drum 30 .

The spray nozzle 90 is preferably provided on the top of the gasket 25, and depending on the embodiment, the spray nozzle 90 is the bottom of the gasket 25 or between the gasket 25 and the cabinet 10, the cabinet 10 ), tub 20, etc. can be arranged in various positions. The injection nozzle 90 is preferably an atomizing nozzle that finely atomizes the wash water and sprays it to the side and rear surfaces of the drum 30 .

The inside of the cabinet 10 is provided with a water supply unit 50 for controlling the inflow of wash water supplied from an external water source (C.W). The water supply unit 50 is connected to the detergent box 60, the first water supply hose 51, and the third water supply hose 52, and is connected to the spray nozzle 90 and the second water supply hose 53. According to the operation of the water supply unit 50, wash water supplied from the external water source (C.W) flows to the first water supply hose 51, the second water supply hose 53, and/or the third water supply hose 52.

When the water supply unit 50 flows wash water through the first water supply hose 51, the wash water flowing through the first water supply hose 51 is mixed with the laundry detergent in the detergent box 60 and then passed through the front water supply pipe 130. It is supplied into the drum 30 through. When the water supply unit 50 flows wash water through the third water supply hose 52, the wash water flowing through the third water supply hose 52 is stored in the detergent box 60 as detergent for pre-wash, rinse detergent, or bleach. After being mixed with the detergent, it is supplied into the tub 20 through the auxiliary water supply pipe 140. When the water supply unit 50 flows wash water through the second water supply hose 53, the wash water flowing through the second water supply hose 53 is sprayed into the drum 30 through the spray nozzle 90.

Inside the cabinet 10, a drain pipe 71 through which wash water flows out of the tub 20, a pump 73 through which wash water flows through the tub 20, and a drain hose 75 through which wash water flows outside are provided. do. The pump 73 discharges wash water from the tub 20 and drains it to the outside through the drain hose 75 .

A plurality of lifters 35 are installed at regular intervals along the inner circumferential surface of the drum 30 . The lifter 35 rotates together with the drum 30 when the drum 30 rotates. When the driving unit 40 rotates the drum 30, the laundry is lifted up by the lifter 35, rises, and then falls down to be washed.

If the rotational speed of the drum 30 is low, the lifter 35 may not lift the fabric accommodated in the drum 30, and if the rotational speed of the drum 30 is high, the fabric accommodated in the drum 30 may be lifted and dropped. can make it

A drum hole 31 is formed in the drum 30 to guide wash water accommodated in the tub 20 to the inner space of the lifter 35 . The drum hole 31 is formed to correspond to the inner space of the lifter 35 so that the washing water accommodated in the tub 20 flows into the inner space of the lifter 35 through the drum hole 31 .

A scoop 32 may be further formed on one side of the drum hole 31 in the drum 30 . The scoop 32 may be concave on the outside of the drum 30 and convex on the inside of the drum 30 . The scoop 32 is preferably formed on one side of the drum hole 31 to guide the wash water in the tub 40 to the drum hole 31 only when the drum 30 rotates in one direction.

As the drum 30 rotates, the lifter 35 receives wash water into the inner space and then sprays it downward. The lifter 35 is formed with a lifter hole 35a through which the washing water received into the inner space through the drum hole 31 is sprayed with cloth at a predetermined rotational position of the drum 30 . The washing water received into the inner space of the lifter 35 through the drum hole 31 at position A in FIG. 4 escapes through the lifter hole 35a at position B in FIG. 4 and is sprayed on the fabric.

5 is a block diagram of a washing machine according to an embodiment of the present invention.

The controller 100 controls the entire operation of the washing machine according to an operation command received through the control panel 13 . The controller 100 is preferably provided in the control panel 13 . The control unit 100 may include a microcomputer for controlling the operation of the washing machine, a storage device, and other electronic components. The controller 100 determines whether or not to proceed with each cycle according to the washing course selected by the user, whether to perform operations such as water supply, washing, rinsing, draining, spin-drying, and drying within each cycle, and determines the time and number of repetitions. do.

The controller 100 receives the water level measured by the water level sensor 72 and processes it. The controller 141 receives an operation command from the control panel 13 and displays the operating state of the washing machine on the control panel 13 . The controller 100 controls the water supply unit 50, the driving unit 40, the pump 73, and the heater 80 according to the selected course or other operation commands.

6 is a diagram illustrating a control method of a washing machine according to an embodiment of the present invention.

Before the initial water supply 210, the control unit 100 may perform laundry quantity detection. The fabric amount detection is a step in which the drive unit 40 rotates the drum 30 to detect the amount of fabric accommodated in the drum 30 (hereinafter referred to as 'cloth amount') and sets a target water level. The controller 100 sets a target water level according to the detected amount of laundry. In addition, the controller 100 determines the operating time for each stage according to the detected amount of fabric.

It is preferable that the control unit 100 performs the initial water supply 210 when the laundry amount detection is completed and the target water level is set.

The initial water supply 210 is a step of spraying wash water into the drum 30 through the spray nozzle 90 while rotating the drum 30 . In the initial water supply 210, the control unit 100 drives the driving unit 40 to rotate the drum 30 and controls the water supply unit 50 to spray wash water into the drum 30 through the spray nozzle 90. .

During the initial water supply (210), the control unit 100 controls the water supply unit 50 to flow wash water from the external water source (C.W) to the second water supply hose (53). Wash water flowing through the second water supply hose 53 is sprayed into the drum 30 through the spray nozzle 90 . During the initial water supply 210, it is preferable that the control unit 100 intermittently operates the water supply unit 50 to intermittently spray washing water.

During the initial supply of water 210, the control unit 100 drives the driving unit 40 to rotate the drum 30. When the spray nozzle 90 sprays wash water, the control unit 100 rotates the drum 30 so that the cloth rolls in the drum 30 and is soaked in the wash water mixed with the detergent. During the initial supply of water 210, the drum 30 preferably rotates at about 46 RPM, which allows the carriage to roll in the drum 30. The control unit 100 controls the driving unit 40 to intermittently rotate the drum 30 at intervals of several seconds. The drum 30 is preferably rotated in the other direction so that the wash water is accommodated in the lifter 35 and is not sprayed.

The controller 100 controls the water supply unit 50 to supply wash water higher than a general target water level. The controller 100 supplies wash water by controlling the water supply unit 50 so that the level of wash water accommodated in the tub 20 is sufficiently higher than the lower end of the drum 30 .

When the initial water supply 210 by the spray nozzle 90 is finished, the control unit 100 controls the water supply unit 50 to stop spraying the wash water and then performs the soaking 220 .

The wetting core 220 is a step in which the drum 30 is rotated so that the lifter 35 receives the wash water in the tub 20 and then sprinkles it. In the wetting core 220, the control unit 100 rotates the drum 30 in one direction by driving the driving unit 40 so that the lifter 35 receives and sprays the wash water in the tub 20.

In the foaming core 220, the control unit 100 controls the drive unit 40 to rotate the drum 30 more slowly than the initial water supply 210 step. During the wetting core 220, it is preferable that the drum 30 rotates at about 28 RPM.

When the drum 30 rotates in one direction at a low speed in the soaking core 220, the wash water accommodated in the tub 20 flows into the inner space of the lifter 35 through the drum hole 31, and then passes through the lifter hole 35a. sprayed down through the The wash water sprayed from the lifter 35 is sprayed onto the cloth rolling on the lower side of the drum 30 to wet the cloth. The control unit 100 controls the driving unit 40 to intermittently rotate the drum 30 at intervals of several seconds.

When the foaming by the lifter 35 ends, the control unit 100 accelerates the drum 30 to drain water 230 .

Drainage 230 is a step in which the drum 30 rotates so that the cloth adheres to the drum 30 and rotates, and the pump 73 drains the wash water in the tub 20 to the outside. In the drainage 230, the driving unit 40 is controlled to rotate the drum 30 so that the cloth adheres to the drum 30 and rotates, and the pump 73 is driven to drain the washing water in the tub 20 to the outside.

When draining water (230), the control unit 100 operates the pump 73 to discharge wash water from the tub 20 and drains the wash water to the outside through the drain hose 75. When the pump 73 drains the wash water, the control unit 100 rotates the drum 30 at high speed so that the cloth adheres to the drum 30 and rotates. During drainage 230, the drum 30 preferably rotates at a maximum of 108 RPM. During drainage 230, the control unit 100 controls the drive unit 40 to repeat acceleration and deceleration of the drum 30. Accordingly, the fabric is repeatedly compressed and then dropped to the drum 30 . The drum 30 is preferably rotated in the other direction so that the wash water is accommodated in the lifter 35 and is not sprayed.

When the fabric sufficiently soaked in the fabric wetting core 220 is pressed against the drum 30 during drainage 230, the wash water soaked in the fabric escapes. In addition, if there is a part that is not yet wet during the wetting core 220, wash water from other parts permeates. Since the drum 30 of the cloth core 220 repeats acceleration and deceleration, the wash water soaked in the cloth is not completely dehydrated.

It is preferable that the soaking core 220 proceeds until the washing water in the tub 20 is completely drained.

When drainage by the pump 73 is completed, the control unit 100 stops operation of the pump 73 and accelerates the drum 30 to perform main water supply 240 .

The main water supply 240 is a step of supplying wash water mixed with laundry detergent into the drum 30 through the front water supply pipe 130 while rotating the drum 30 . In the main water supply 240, the control unit 100 drives the driving unit 40 to rotate the drum 30 so that the cloth attaches to the drum 30 and rotates, and controls the water supply unit 50 to pass through the front water supply pipe 130 to the drum. (30) to supply wash water mixed with laundry detergent.

During the main water supply 240, the control unit 100 controls the water supply unit 50 to flow wash water from the external water source C.W to the first water supply hose 51. Wash water flowing through the first water supply hose 51 is mixed with laundry detergent in the detergent box 60 and then supplied into the drum 30 through the front water supply pipe 130.

During the main water supply 240, the control unit 100 drives the driving unit 40 to rotate the drum 30 at high speed. When wash water mixed with laundry detergent is supplied into the drum 30 through the front water supply pipe 130, the controller 100 rotates the drum 30 at a high speed so that the cloth sticks to the drum 30 and rotates.

In the main water supply 240, the control unit 100 controls the driving unit 40 to rotate the drum 30 faster than in the water drainage 230 step. During the main water supply 240, it is preferable that the drum 30 rotates at a maximum of 150 RPM. In this series 240, the control unit 100 controls the driving unit 40 to repeat acceleration and deceleration of the drum 30. Accordingly, the fabric is repeatedly compressed and then dropped to the drum 30 . The drum 30 is preferably rotated in the other direction so that the wash water is accommodated in the lifter 35 and is not sprayed.

It is preferable that the main series 240 is performed for a preset time. During the main water supply 240, it is preferable that the water level of the washing water accommodated in the tub 20 is lower than the lower end of the drum 30. That is, when the main water supply 240 is performed, the water level of the wash water accommodated in the tub may be lower than the water level of the wash water accommodated in the tub when the initial water supply 210 is completed.

When the supply of wash water by the front water supply pipe 130 is terminated, the controller 100 controls the water supply unit 50 to stop the supply of wash water and then performs heating 250 .

The heating 250 is a step of heating the wash water supplied to the tub 20 while the drum 30 rotates. In the heating 250, the control unit 100 controls the driving unit 40 to rotate the drum 30 and operates the heater 80 to heat the wash water accommodated in the tub 20.

During heating 250, the controller 100 operates the heater 80 to heat the wash water accommodated in the tub 20. When the heater 80 heats wash water, the control unit 100 alternately rotates the drum 30 in one direction and the other direction. When the drum 30 rotates in one direction, the washing water accommodated in the tub 20 flows into the inner space of the lifter 35 through the drum hole 31 and is then sprayed downward through the lifter hole 35a. When the drum 30 rotates in the other direction, the fabric rolls inside the drum 30 . During heating 250, it is preferable that the drum 30 rotates at about 28 RPM.

During heating 250, the controller 100 may control the water supply unit 50 to additionally supply wash water from the external water source C.W. The controller 100 may control the water supply unit 50 to additionally supply wash water through the front water supply pipe 130, the auxiliary water supply pipe 140, and/or the spray nozzle 90.

When the washing water heating by the heater 80 is finished, the controller 100 stops the operation of the heater 80 and performs the main washing 260 . The main washing 260 is a step in which the drum 30 is rotated to remove contamination from the fabric. During the main washing 260, the drum 30 rotates at various rotational speeds to repeatedly raise and fall the fabric, thereby applying mechanical forces such as bending force, frictional force, and impact force to the fabric to remove contamination from the fabric. In the main wash 260, the drum 30 alternately rotates in one direction and the other direction so that the lifter 35 sprays the wash water.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications and implementations are possible by those skilled in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

10: cabinet 20: tub
30: drum 35: lifter
40: driving unit 50: water supply unit
60: detergent box 73: pump
80: heater 90: injection nozzle
130: front water supply pipe 140: auxiliary water supply pipe

Claims (14)

a tub accommodating wash water;
a drum rotatably disposed in the tub and accommodating cloth;
a driving unit rotating the drum;
a pump draining wash water in the tub to the outside;
a water supply unit controlling the inflow of washing water from an external water source;
a first water supply hose and a second water supply hose connected to the water supply unit;
a detergent box configured to accommodate detergent and connected to the first water supply hose to receive wash water from the water supply unit;
a water supply pipe connected to the detergent box and supplying wash water mixed with detergent to the tub or the drum;
a spray nozzle connected to the second water supply hose, receiving wash water from the water supply unit, and injecting the supplied wash water into the drum; and
And a control unit for controlling the drive unit, the water supply unit and the pump,
The control unit,
Performing an initial water supply step of spraying wash water into the drum through the spray nozzle by controlling the water supply unit;
performing a popping step of rotating the drum by driving the drive unit;
Performing a draining step of draining wash water in the tub to the outside by driving the pump;
The washing machine performs a main water supply step of supplying wash water mixed with detergent into the drum through the water supply pipe by driving the drive unit to rotate the drum and controlling the water supply unit. According to claim 1,
In the main water supply step, the water level of the wash water accommodated in the tub is lower than the water level of the wash water accommodated in the tub when the initial water supply step is completed. According to claim 1,
The controller rotates the drum by controlling the driving unit so that the fabric attaches to the drum and rotates in the draining step. According to claim 1,
The control unit controls the driving unit so that the fabric rotates attached to the drum in the main water supply step. According to claim 1,
cabinets forming the facade; and
Further comprising a gasket provided between the cabinet and the tub to seal between the tub and the cabinet;
The spray nozzle is provided in the gasket. According to claim 1,
cabinets forming the facade; and
Further comprising a gasket provided between the cabinet and the tub to seal between the tub and the cabinet;
The water supply pipe includes a front water supply pipe connected to the gasket. According to claim 1,
Further comprising a heater provided in the tub to heat the wash water,
The controller performs a heating step of heating wash water by operating the heater after the main water supply step. According to claim 7,
The controller rotates the drum by driving the driving unit in the heating step. According to claim 2,
The controller controls the water supply unit to stop spraying of wash water when the initial water supplying step is completed. According to claim 2,
The washing machine in which the drum rotates more slowly than the initial water supply step in the impregnation step. According to claim 10,
The controller controls the driving unit to rotate the drum more slowly than the initial water supplying step in the impregnation step. According to claim 1,
Further comprising a lifter provided on an inner circumferential surface of the drum, rotating together with the drum when the drum rotates, and having an inner space,
The drum includes a drum hole for guiding wash water in the tub to an inner space of the lifter,
The washing machine according to claim 1, wherein the lifter has a lifter hole, and sprays wash water accommodated in the inner space according to rotation of the drum. According to claim 6,
The washing machine further comprises a third water supply hose connecting the water supply unit and the detergent box. According to claim 13,
The water supply pipe further includes an auxiliary water supply pipe supplying wash water passing through the third water supply hose and the detergent box into the tub.

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