KR101602671B1 - Washing machine - Google Patents

Abstract

The washing machine according to the present invention is characterized in that the washing machine comprises an outer tank in which wash water is contained, an inner tank rotatably disposed in the outer tank for receiving the laundry, a first jetting unit for spraying washing water toward the bottom of the inner tank, And a second jetting unit for jetting the washing water toward the inner side of the washing tub.

Description

[0001] Washing machine [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a laundry processing apparatus, and more particularly, to a laundry processing apparatus including a plurality of jetting units for jetting wash water toward a bottom and / or an inner surface of an inner tank.

Generally, a laundry processing apparatus separates contaminants from clothes, bedding, etc. (hereinafter, abbreviated as "laundry") by using physical action such as chemical decomposition of water and detergent and friction between water and laundry A washing machine, a drying device for dehydrating and drying the wet laundry, a refresher for spraying heated steam on the laundry to prevent allergy caused by the laundry, and a washing machine for washing the laundry easily, Various devices are collectively referred to. Meanwhile, the washing machine, which is a kind of laundry processing apparatus, is divided into an agitator type, a drum type, and a pulsator type according to its structure and washing method.

Such a washing machine normally performs a washing process, a washing process, a rinsing process, and a dewatering process in order to wash the laundry. Depending on the user's choice, the washing device can perform only a predetermined stroke in the above- Washing is done by the washing method.

The conventional washing machine has a problem that the angle at which the washing water is supplied is constant and the laundry adhered to the side surface of the washing tub is not wetted sufficiently. Particularly, when a rinse cycle is performed in a state where the laundry is stuck to the side of the washing tub by the centrifugal force, the washing water must be supplied until the laundry attached to the side of the washing tub is locked.

An object of the present invention is to provide a laundry processing apparatus and a laundry processing apparatus control method capable of improving the rinsing performance by spraying washing water toward the side and bottom of the washing tub and reducing the amount of washing water required for rinsing .

In order to solve the above problems, the present invention provides a washing machine comprising: an outer tub containing washing water; an inner tub rotatably disposed in the outer tub to receive the laundry; a first jetting unit for spraying washing water toward the bottom of the inner tub; And a second jetting unit for jetting wash water toward the inner surface of the inner tank.

First, the laundry attached to the side of the inner tank can be effectively wetted.

Second, washing water is sprayed three-dimensionally toward the side and bottom of the inner tank, so that the laundry can be evenly wetted, and washing and rinsing performance is improved.

Thirdly, when the simple dewatering process is carried out, the laundry can stick to the side wall of the inner tank due to the centrifugal force. The laundry can be effectively rinsed by directly spraying the washing water toward the inner side of the inner tank, And the power consumption can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

1 is a perspective view of a laundry processing apparatus 1 according to an embodiment of the present invention. 2 is a side cross-sectional view of the laundry processing apparatus 1 shown in Fig. FIG. 3 is a partially enlarged view of a part of FIG. 1; FIG. FIG. 4 is a schematic view for explaining a mode in which the first ejecting part 32 of the laundry processing apparatus 1 according to the embodiment of the present invention ejects washing water. FIG. 5 is a schematic view for explaining a mode in which the second jetting portion 34 of the laundry processing apparatus 1 according to the embodiment of the present invention injects washing water. FIG. 6 shows a sprayed state in which washing water is sprayed into the inner tub 21 by the first spraying part 32 and the second spraying part 34. FIG. FIG. 7 shows a region injected by the first jetting section 32 and the second jetting section 34 with reference to the bottom of the inner tank 21. As shown in FIG.

1 to 7, the laundry processing apparatus 1 includes a cabinet 11 forming an outer appearance, a top cover 12 provided on the upper side of the cabinet 11, A door 15 rotatably mounted on the cabinet 11 for inputting and discharging laundry into and out of the washing tub 20 and a door 15 capable of entering and exiting the washing machine 20 in the top cover 12, A detergent box housing 44 in which a detergent box 14 and a detergent box 14 are accommodated to receive detergent and a detergent box housing 44 which is connected to an external water source and through a water supply channel 17 and a water supply channel 17, A first jetting section 32 and a second jetting section 34 for jetting the washing water introduced through the water supply flow path 17 into the washing tub 20, And controls the washing water to be sprayed through at least one of the first spraying part 32 and the second spraying part 34 in accordance with an ongoing water supply stroke A drainage passage 54 for discharging washing water in the washing tub 20 to the outside and a drainage valve 53 for blocking the drainage passage 54 and the like.

The washing tub 20 includes an outer tub 22 containing wash water and an inner tub 21 rotatably disposed in the outer tub 22 and containing laundry and washing water therein. At this time, a plurality of holes (not shown) are formed in the inner tank 21 so that the washing water can circulate between the outer tank 22 and the inner tank 21. [ A pulsator 16 for generating a rotating water flow is rotatably provided on the bottom of the inner tank 21 and an autobalance 27 is provided on the inner tank 21. [ The autobalance 27 is for reducing vibrations caused by the amount of eccentricity of laundry contained in the inner tub 21, and can be realized by liquid balance, ball balance, or the like.

The outer tub 22 is suspended by the support member 23 on the inside of the cabinet 11 and the top cover 12 and a damper 25 serving as a buffer is provided on one end of the support member 23. A clutch 51 and a motor 52 are disposed on the lower side of the outer tank 22 for selectively rotating the inner tank 21 and the pulsator 16. In this embodiment, the indirect driving method in which the driving force of the motor 52 is transmitted through a belt (not shown) to rotate the inner tub 21 or the direct driving method in which the motor 52 directly rotates the inner tub 21 It is possible.

The clutch 51 transmits the rotational force of the motor 52 to the inner tub 21 and / or the pulsator 16 so that only the inner tub 21 is rotated according to the operation of the clutch 51 or the pulsator 16 , Or it is possible for the inner tub 21 and the pulsator 16 to rotate together.

The first jetting section 32 injects washing water in a substantially downward direction toward the bottom of the inner tub 21 and the second jetting section 34 injects washing water in a substantially diagonal direction toward the inner side surface of the inner tub 21 Spray. At this time, it is preferable that the first spraying part 32 and the second spraying part 34 are configured to spray wash water in a shower manner so that laundry can be evenly wetted.

The first jetting section 32 is directly connected to the water supply channel 17 so as to jet wash water not passed through the detergent box 14 but in this embodiment, And the second jetting section 34 is disposed so as to form a predetermined angle? With respect to the first jetting section 32 on the basis of the center axis of the inner tub 21, 14, the washing water directly supplied through the water supply channel 17 is sprayed.

When the washing cycle is performed, washing water mixed with the detergent is sprayed through the first spraying unit 32 to perform washing by the action of the detergent, and when the rinsing cycle is performed, the second spraying unit 34 so as to perform rinsing of the laundry.

On the other hand, it is preferable that the washing water sprayed by the first spray part 32 and the washing water sprayed by the second spray part 34 do not interfere with each other before reaching the inner tub 21. [ To this end, the first jetting section 32 injects washing water into the half region (A in FIG. 7) of the bottom of the inner tank 32 on the side of the first jetting section 32, (B in Fig. 7) opposite to the second spraying portion 34 side of the bottom of the inner tub 21 to reach the inner surface of the inner tub 21. As shown in Fig.

The first jetting section 32 injects the washing water into the jetting area A and the second jetting section 34 jet the washing water into the jetting area B so that the jetting sections 32 It is not guaranteed that the washing water sprayed by the first spraying unit 34 does not interfere with each other before reaching the inner tub 21. The washing water sprayed into the respective spraying areas is sprayed to the first spraying unit 32, The arrangement direction, the injection pressure, and the like of the first and second injection portions 34 and 34 should be adjusted appropriately.

7, when the wash water jetted by the first jetting section 32 is jetted to a range of S1 within the jetting area A, the second jetting section 34 is jetted from the jetting area A, It is preferable that the washing water is injected into the inner tub 21 so as to reach the S2 range which does not overlap the S1 of the bottom of the inner tub 21 without interfering with the washing water sprayed by the first spray portion 32. [

The advantage of the first spray portion 32 spraying the wash water to the spray region A and the second spray portion 34 spraying the wash water to the spray region B can be seen from other aspects. In all the cases where the first jetting section 32 injects the washing water into the jetting area A and the second jetting section 34 jet the washing water into the jetting area B, It is possible to reduce the range of interference between the washing water sprayed from each of the spraying portions 32 and 34. However,

A portion overlapping between the jetting region A and the jetting region B may occur depending on the positional relationship between the first jetting section 32 and the second jetting section 34. That is, The overlapping areas of the jetting area A and the jetting area B by the same angle? Are formed by the angle? Between the first jetting part 32 and the second jetting part 34 as well. At this time, in order to minimize the interference between the washing water sprayed by the first spraying part 32 and the second spraying part 34, the second spraying part 34 injects the spraying area A into the spraying area B The washing water is sprayed from the portion other than the overlapping portion to the inner surface of the inner tub 21.

As described above, by setting the spraying range of the second spraying section 34, one side of the washing water sprayed by the second spraying section 34 is sprayed into the spraying area B other than the part overlapping the spraying area A The washing water sprayed to the area other than the area where the spray area A and the spray area B overlap is not interfered with the washing water sprayed by the first spray part 32 before reaching the inner tank 21 Do not. Therefore, it is possible to secure a section in which no interference occurs between the washing water sprayed by the first spraying section 32 and the second spraying section 34.

The first jetting portion 32 and the second jetting portion 34 are disposed on the top cover 12 but are not limited thereto and the scope of the present invention is not limited to the first jetting portion 32 and the second jetting portion 34. [ And is not limited by the arrangement position of the yarn portion 34. The first jetting section 32 may be provided in the cabinet 11 or the top cover 12 so that the wash water can be jetted toward the bottom of the inner tank 21. The second jetting section 34 The washing water can be injected at various positions where it can be sprayed toward the inner surface of the inner tank 21. [

On the other hand, when the operation of the laundry processing apparatus 1 is carried out, the washing, rinsing, dewatering and drying steps are performed in order, or selected by the user's setting or according to the pre- Administrations are carried out.

During the washing or rinsing cycle, washing water for washing or rinsing laundry is supplied. At this time, the control unit 13 controls at least one of the first spraying unit 32 and the second spraying unit 34 to spray wash water according to the progressing stroke.

When supplying water for washing, the control unit 13 can control the washing water to be sprayed by the first spraying unit 32. Before the washing cycle starts, the laundry is piled on the bottom of the inner tank 21. The laundry is sprayed by the first sprayer 32 so that the washing water is sprayed toward the bottom of the inner tank 21, . In this case, the washing water must not necessarily be sprayed only by the first spraying section 32, and the control section 32 causes the first spraying section 32 and the second spraying section 34 to spray the washing water together Of course.

More specifically, the control unit 13 opens the water supply valve 18 and the auxiliary valve 42 to allow the wash water flowing through the water supply channel 17 to flow through the water hole 44h formed in the detergent box housing 44, Is introduced into the box (14), mixed with the detergent, and then injected into the inner tank (21) through the first jet part (32). The water supply valve 18 and the auxiliary valve 42 may be implemented as a solenoid valve.

Similarly, the control unit 13 controls the solenoid valve (not shown) to open the solenoid valve for interrupting the washing water supplied to the second spraying unit 34 so that the washing water is sprayed by the second spraying unit 34 Can be controlled. The method of guiding the wash water supplied through the water supply channel 17 to the second spraying unit 34 may be variously performed by a person having ordinary skill in the art to which the present invention belongs.

On the other hand, while the washing cycle is being performed, the inner tub 21 is rotated at a high speed and simple dehydration can be performed in which dehydration of laundry is performed by centrifugal force. The laundry is adhered to the side wall of the inner tank 21 due to the simple dewatering, and therefore, after the simple dewatering, the spraying is performed by the second jetting portion 34 So that the washing water is directly sprayed toward the bolls attached to the inner surface of the inner tub 21. [ However, after the simple dewatering, not only the second jetting section 34 but also the first jetting section 32 can be jetted at the same time. In this case, the laundry that has fallen on the bottom of the inner tub 21 due to the spraying force of the second spraying unit 34 is once again treated by the first spraying unit 32, and the laundry processing performance is remarkably improved.

For example, the laundry is washed by the action of the detergent, the dewatering is performed for a predetermined period of time in order to drop the bubbles or dirt adhering to the laundry, and the drain water for discharging the washing water in the washing tub 20 to the outside The washing water is supplied to the inner surface of the inner tub 21 through the second spraying portion 34 to effectively wet the laundry adhering to the inner surface of the inner tub 21 by the simple dehydration, To be sprayed.

On the other hand, when spraying is performed by the second spraying portion 34, it is preferable that the inner tub 21 is rotated at a speed at which the laundry can be adhered to the inner surface of the inner tub 21 by the centrifugal force. In this case, since the washing water is directly sprayed onto the laundry by the second spraying portion 34, the washing performance is improved and the amount of washing water required can be drastically reduced.

Since the direction of spraying the washing water is fixed so that the washing water is sprayed toward the lower side of the inner tub 21, the washing laundry is different in order to wet the laundry sticking to the inner surface of the inner tub 21 The washing water has to be supplied to the attached level, resulting in waste of washing water and power loss due to an increase in load. Since the laundry processing apparatus 1 according to the embodiment of the present invention directly discharges the washing water toward the inner side surface of the inner tub 21 without filling the washing water from the bottom of the inner tub 21, The problem of the apparatus can be solved.

On the other hand, it is not always necessary that the washing water is sprayed only by the second spraying portion 34 at the time of water supply performed after the simple dehydration, and the first spraying portion 32 and the second spraying portion 34 together wash water Of course.

Particularly, when the first jetting section 32 and the second jetting section 34 jet the washing water together, laundry adhering to the inner surface of the inner tub 21 is jetted by the second jetting section 34 The rinsing performance is improved because the rinsing water is wetted by the washing water sprayed by the first spraying part 32 after falling to the bottom of the inner tank 21 by the washing water.

On the other hand, when the washing water is being sprayed by the second spraying section 34, the control section 13 preferably controls the inner tub 21 to rotate. By rotating the inner tub 21, the washing water sprayed by the second spraying portion 34 is uniformly applied to the inner surface of the inner tub 21, thereby improving the rinsing performance, reducing the amount of washing water required and reducing power consumption There is an effect that can be.

8 to 9 show a spray nozzle 60 applied to the laundry processing apparatus 1 according to an embodiment of the present invention.

The second jetting section (34) includes a jetting nozzle (60) for jetting wash water. The jetting nozzle 60 is formed with a spraying surface 62a which is inclined so that the water is deflected while the washing water strikes. The washing water supplied to the spray nozzle 60 is refracted against the spray surface 62a, and is guided along the spray surface 62a to be sprayed.

More specifically, the injection nozzle 60 is provided with an inflow pipe 61 forming a passage through which the washing water flows, and an inflow pipe 61 for guiding the direction of the washing water discharged from the inflow pipe 61 downward, And a nozzle unit 62 formed to gradually increase the cross-sectional area of the flow path so that the washing water passing through the nozzle unit 62 is gradually dispersed.

The nozzle unit 62 is formed in a substantially funnel shape so that the cross-sectional area of the flow path gradually increases from the inlet end side through which the washing water flows from the inlet pipe 61 toward the outlet end side where the washing water is sprayed.

The nozzle portion 62 is formed with a jetting surface 62a through which the jetted water from the inflow pipe 61 is struck. The spray surface 62a is arranged so as to be twisted at an angle against the inflow pipe 61. [

The spray surface 62a is formed so as to have a gradually wider width toward the end where the washing water is sprayed. The spray surface 62a is formed so that one side edge of the washing water sprayed by the spray nozzle 60 contacts the bottom of the inner tank 21 and the other edge touches the inner side surface of the inner tank 21. [ Since the spray surface 62a is arranged so as to be twisted at an angle to face the inflow pipe 61, the wash water is biased to either the left or the right side, and the sprayed wash water contacts the boundary Is formed obliquely from the inner surface of the inner tank 21 to the bottom.

On the other hand, in order to allow the washing water to be spread and sprayed by the second spraying portion 34 to reach the bottom and the inner surface of the inner tub 21, the second spraying portion 34 is required to spray the washing water with a sufficient spraying pressure Therefore, it is preferable that the jetting pressure of the second jetting section 34 is set higher than the jetting pressure of the first jetting section 32. Particularly, in the case where water is supplied simultaneously to the first spray portion 32 and the second spray portion 34, the injection pressure of the second spray portion 34 is made higher than the spray pressure of the first spray portion 32 The washing water can be used more efficiently and the washing or rinsing performance of the laundry can be improved.

The washing water discharged from the inflow pipe 61 toward the jetting surface 62a is spread along the jetting surface 62a to form a flat surface while the jetted water is jetted at an angle formed by both sides of the jetted washing water. Lt; / RTI > is determined by both ends of the contact portion 62a.

The structure in which the jetting surfaces 62a are arranged in an irregular manner will be described later in more detail.

The injection nozzle 60 may further include a reinforcing portion 63 for reinforcing the bonding strength when mounted on the top cover 12. The reinforcing portion 63 may be formed as a plate that protrudes outward along the outer periphery of the inflow pipe 61.

The injection nozzle 60 is formed symmetrically with respect to the reference line M so as to be symmetrical with respect to the reference line M so that the reference line M forms a predetermined angle? , And is arranged in a state of being rotated at an angle? About the center line passing through the inlet pipe 61 in the longitudinal direction.

Hereinafter, the angle? Is defined as a 'rotation angle'. 8, since the spray nozzle 60 is arranged in a state rotated at an angle? With respect to the vertical line L as described above, the washing water reaching the inner tub 21 is discharged from the inner surface of the inner tub 21 And proceed to the oblique direction to form the boundary line to the bottom.

On the other hand, the jetting surface 62a is formed so as to form a predetermined angle (V) with the vertical line (L). Hereinafter, the predetermined angle V is defined as a 'tilt angle'. That is, as the tilt angle V becomes smaller, the washing water will be sprayed downward. Further, as the tilt angle V is smaller, the impact received from the spray surface 62a of the washing water discharged from the inflow pipe 61 will be larger, and the laundry water will be spread and spread.

On the other hand, the width of the washing water sprayed by the spray nozzle 60 is determined by the angle (W in FIG. 8) formed by the side edges w1 and w2 constituting the width of the flow path formed by the inner surface of the nozzle portion 62 All. Hereinafter, the angle W is defined as an 'injection width angle'. The spray width angle can be determined by both ends of the spray surface 62a where the wash water strikes.

On the other hand, depending on the flow rate flowing into the inflow pipe 61, the washing water 62a discharged from the inflow pipe 61 and the lower part of the nozzle part 62, forming a predetermined angle with the spray surface 62a, The angle T between the jetting surface 62a and the lower side surface 62b of the jetting surface 62a in the extending direction t1 and the lower side surface 62a of the jetting surface 62a, The angle formed by the extending direction t2) will determine the spray thickness of the washing water.

The laundry processing apparatus 100 according to an embodiment of the present invention is characterized in that the washing water is sprayed toward the inner side and the bottom of the inner tub 21 and the boundary line formed by the sprayed washing water and the inner tub 21 meets the oblique line The rotation angle?, The injection width angle W, and the tilt angle V are determined.

Due to the characteristics of the injection nozzle 60 arranged so as to have the tilt angle V and the rotation angle ?, the jetting surface 62a is arranged to be opposite to the inlet tube 61, And is sprayed to the bottom of the inner tub 21 by the tilting angle V while colliding with the spray surface 62a of the inner tub 21 to the left and right sides of the inner tub 21 And is sprayed toward one side of the inner tub 21 to reach the inner surface of the inner tub 21. [

On the other hand, it is preferable that the injection nozzle 60 is rotated and mounted on the top cover 12 so that the larger the value of? Is made so that the greater amount of wash water from the sprayed washing water comes into contact with the inner surface of the inner tank 21 , It is preferable that the spraying surface 62a is formed so that the W value becomes large and the V value becomes small in order to spray the laundry water while being spread thinly in the width direction.

As described above, the washing water can be sprayed by the first spraying part 32 and / or the second spraying part 34 at the time of the washing or rinsing. At this time, A control panel, and is provided in the laundry processing apparatus to receive various control commands from the user and to display information such as the operating state of the laundry processing apparatus to the outside, It is possible to distinguish it more clearly by the means for providing the information. For example, the control panel may include a display unit such as an LCD, an LED, or a light emitting diode. The laundry processing apparatus according to an embodiment of the present invention may include a display unit for displaying information on the operating state of the laundry processing apparatus 1 to the user, The administration can be clearly distinguished.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and range of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

1 is a perspective view of a laundry processing apparatus according to an embodiment of the present invention.

FIG. 2 is a side cross-sectional view of the laundry processing apparatus shown in FIG. 1. FIG.

FIG. 3 is a partially enlarged view of a part of FIG. 1; FIG.

FIG. 4 is a schematic view for explaining a mode in which the first jetting unit of the laundry processing apparatus according to the embodiment of the present invention injects washing water.

FIG. 5 is a schematic view for explaining a mode in which the second jetting unit of the laundry processing apparatus according to the embodiment of the present invention injects washing water.

FIG. 6 shows a sprayed state in which washing water is sprayed into the inner tub by the first jetting portion and the second jetting portion.

Fig. 7 shows the region injected by the first jetting portion and the second jetting portion with reference to the bottom of the inner tank.

8 to 9 show a spray nozzle applied to a laundry processing apparatus according to an embodiment of the present invention.

Claims (13)

The wash tank contains the outer tank; An inner tub rotatably disposed in the outer tub to receive the laundry; A water supply channel connected to the outside water source and through which wash water flows; A detergent box containing a detergent; A first jetting section for jetting washing water via the detergent box toward the bottom of the inner tank; A second jetting section for jetting laundry water directly supplied through the water supply channel without passing through the detergent box toward the inner side of the inner tank; And And a control unit for controlling the washing water to be sprayed through at least one of the first jetting unit and the second jetting unit so that the inner tub is rotated at a high speed during the washing cycle and simple dehydration is performed in which the laundry is dehydrated and, Wherein, And controls the washing water to be sprayed only by the first spraying part at the time of water supply for starting the washing operation, During the laundry washing operation, the washing water is sprayed by only the second spraying part at the water supply after the simple dehydration, And controls the inner tank to rotate when the washing water is sprayed from the second jetting unit. The wash tank contains the outer tank; An inner tub rotatably disposed in the outer tub to receive the laundry; A water supply channel connected to the outside water source and through which wash water flows; A detergent box containing a detergent; A first jetting section for jetting washing water via the detergent box toward the bottom of the inner tank; A second jetting section for jetting laundry water directly supplied through the water supply channel without passing through the detergent box toward the inner side of the inner tank; And And a control unit for controlling the washing water to be sprayed through at least one of the first spraying unit and the second spraying unit, Wherein, The control unit controls the washing water to be sprayed only by the first spraying part when performing the washing step, The washing water is controlled to be sprayed only by the second spraying part when performing the rinsing step, And controls the inner tank to rotate when the washing water is sprayed from the second jetting unit. 3. The method according to claim 1 or 2, Wherein the washing water sprayed by the first spraying part and the washing water sprayed by the second spraying part do not interfere with each other before reaching the inner tank. The method of claim 3, The first injector The washing water is sprayed into the half of the bottom of the inner tub, Wherein the second jetting portion includes: And the washing water is sprayed from the bottom half of the bottom of the inner tub to the inner side of the inner tub from the half region opposite to the side of the second spraying portion. 3. The method according to claim 1 or 2, Wherein the second jetting portion includes: And a spray nozzle having a spray surface inclined so as to be refracted while the washing water hits the sprayed water, wherein the refracted wash water is guided along the spray surface and then sprayed. 6. The method of claim 5, The injection surface, And the width of the washing water gradually increases toward the flow direction of the washing water guided along the spray surface. 6. The method of claim 5, The injection surface, Wherein the washing water sprayed by the spray nozzle is slanted so that one edge of the washing water touches the bottom of the inner tank and the other edge touches the inner surface of the inner tank. 3. The method according to claim 1 or 2, Wherein the injection pressure of the second injection portion is higher than the injection pressure of the first injection portion. delete 3. The method according to claim 1 or 2, In the inner tank, Wherein the laundry is rotated at a speed at which the laundry adheres to the inner surface of the inner tub upon centrifugal force when the washing water is sprayed from the second jetting unit. delete delete 3. The method according to claim 1 or 2, Further comprising a display unit for displaying the execution stroke.

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