KR20170100406A - Washing machine and controlling method thereof - Google Patents

Abstract

The present invention relates to a washing machine and a control method thereof. The washing machine comprises a rotary tub housing laundry; a water supply pipe spraying water onto a surface of the laundry, and a control part controlling an operation of the rotary tub and the water supply pipe, and performing a water supply stroke of supplying water to the rotary tub and a laundry stroke of washing the laundry, wherein the control unit performs a first stroke of rotating the rotary tub at speed higher than rotation speed in the laundry stroke in order to discharge air contained in the laundry before the water supply stroke is completed. Therefore, the laundry can be prevented from rising above a water surface, thereby washing the laundry more efficiently.

Description

[0001] WASHING MACHINE AND CONTROLLING METHOD THEREOF [0002]

The present invention relates to a washing machine, and more particularly, to a technique for rapidly washing laundry before a water supply stroke is performed to remove air existing in the laundry to thereby perform washing more efficiently.

Patent Document 1 discloses a washing machine having a rotating tub for accommodating laundry, a water tub for rotatably accommodating the tub, a motor for rotating the tub, and water supplying means for supplying water to the tub. The washing machine disclosed in Patent Document 1 has a technique of raising and lowering the water surface by intermittently rotating the rotary tub at a water level lower than the water level in the washing cycle before the washing cycle is executed in order to discharge the air contained in the laundry .

Patent Document 1: JP-A-2000-389

However, in Patent Document 1, since the air is discharged by the method of raising and lowering the water surface, in order to prevent the laundry from being blown away by the feather or the hair which is likely to contain air, In the case of a product, there is a problem that the laundry is floated to the water surface in the process of discharging the air and the air can not be taken out sufficiently, and the contamination of the laundry can not be effectively removed.

Accordingly, it is an object of the present invention, which is devised to solve such a problem, to efficiently discharge air even when the laundry is a hair product, and to perform washing more efficiently.

In order to achieve the above object, the present invention is characterized in that an air discharge stroke (first stroke) is performed by rotating the rotary bath at a rotation speed higher than the rotation speed of the rotation stroke of the washing stroke.

More specifically, the present invention relates to a washing machine comprising a rotating vessel for containing laundry, a water tank rotatably accommodating the rotating vessel, a pulsator rotatably disposed on the bottom surface of the rotating vessel, A water supply pipe for supplying water to the water tub or the rotary tub; a drain pipe for draining water staying in the water tub or the rotary tub; a water supply stroke for supplying water to the water tank or the rotary tub to a predetermined water level by the water supply pipe; And a control unit for executing a washing operation for causing the motor to perform a rotating operation to rotate at least one of the rotary tub and the pulsator after the execution of the stroke.

The control unit may rotate the rotary tub to rotate the rotary tub at a rotational speed higher than the rotational speed in the washing cycle to effectively discharge water present in the laundry. do.

Therefore, even in the case of the laundry according to the present invention, the laundry adheres to the inner surface of the rotary tub by the centrifugal force and is simultaneously compressed, so that the air existing in the laundry is discharged to the outside, The detergency is higher.

The second embodiment is characterized in that, in the first stroke, the rotating speed of the rotating tub is 500 rpm or less, which is 300 rpm or more.

The third embodiment is characterized in that, in the first or second embodiment, the pulsator is a rotary blade.

The fourth embodiment is characterized in that in any one of the first to third embodiments, water is sprayed onto the surface of the laundry contained in the rotary tub. Therefore, the control unit executes a wetting process (second process) for spraying water onto the surface of the laundry.

Accordingly, even if the laundry is a hair product, the gap of the yarn in the outer cloth woven with a high density can be clogged with water as the wetting process is carried out, so that air intrudes from the outer side of the outer cloth to the inner side after the first stroke and the second washing, Can be prevented from floating.

The fifth embodiment is characterized in that, in the washing machine of the fourth embodiment, the control section executes the wetting stroke before completion of the water supply stroke.

In this case, after the completion of the water supply stroke, it is possible to effectively prevent the air from intruding from the outside of the laundry outer surface to the inside and causing the laundry to float on the water.

The sixth embodiment is characterized in that, in the washing machine of the fifth embodiment, the water supply pipe feeds water toward the inner side surface or the inner side surface of the rotary tub, and the wetting stroke is also used.

In this case, water supplied during the water supply stroke is likely to come into direct contact with the laundry, thereby effectively preventing the air from penetrating into the inside of the laundry after the start of water supply.

Further, since there is no need to additionally provide a wet water supply pipe for the wetting process, the structure of the washing machine is simplified, thereby reducing the number of parts and the like, thereby reducing the manufacturing cost.

The seventh embodiment is characterized in that, in any one of the fourth to sixth embodiments, the injection width in the forward and backward directions injected by the water supply pipe onto the bottom surface of the rotary tub and the vertical width Direction is set to be equal to or greater than 1/3 of the width of the bottom surface of the rotary tub. The sum of the spray width in the left and right direction sprayed on the bottom surface of the rotary drum by the water supply pipe and the spray width in the vertical direction sprayed on the rotary drum side by the water supply pipe is 1 / 3 or more.

In this case, the sum of the spray width in the front-rear direction on the bottom surface of the rotary tub of the wetting means and the spray width in the vertical direction on the side surface of the rotary tub of the wetting means, The total width of the spray width in the lateral direction and the spray width in the vertical direction on the side surface of the rotating tub of the wetting means is large so that the amount of water is set to be smaller than 1/3 of the width of the bottom surface of the rotating tub, It is possible to uniformly spray the liquid. Therefore, water can be efficiently sprayed onto the laundry in the wetting stroke, and the amount of water required in the wetting stroke can be reduced.

The eighth embodiment is characterized in that, in the fourth or fifth embodiment, the wetting means injects water held in the water tub or rotary tub to the upper side of the laundry in the rotary tub, So that the water held in the water tub or the rotary tub is injected to the upper side of the laundry in the tub.

In this case, since the water held in the water tank or the rotating tub is directed from the upper side to the lower side of the laundry, the water can be evenly distributed on the surface of the laundry.

The ninth embodiment is further provided with the water level sensor for measuring the water level of the water tank or the rotary tank in the fifth or sixth embodiment, wherein the wetting means injects the water to be supplied to the surface of the laundry, And the control section executes the wetting stroke before completion of the air discharge stroke.

When the water level detected by the water level sensor is equal to or higher than a predetermined water level of the water stop threshold in the wetting stroke, the water stop control for terminating the wetting stroke and the water level detected by the water level sensor are equal to or higher than a predetermined drainage threshold value And drainage control for draining the water held in the water tank or the rotary tank by the water drainage means.

When the water supply threshold value and the drainage threshold value are set and drainage control is performed, water can be prevented from leaking out of the water tank in the air discharge stroke (first stroke).

The tenth embodiment is the air conditioner according to the eighth embodiment, further comprising a water level sensor for measuring the water level of the water tank or the rotating bath, and the control unit executes the wetting stroke before completion of the air discharge stroke, And a water supply step of supplying water to the water tank or the rotary tank by the water supply means is performed before.

In the water supply step, the water supply stop control for terminating the water supply stroke when the water level measured by the water level sensor is equal to or higher than a predetermined water supply stop threshold value, and the water supply stop control for stopping the water supply stroke, And water drainage control for draining the water in the water tank or the rotary tank when the water level is equal to or greater than the threshold value.

By executing the water supply stop control and the drain control and setting the water supply stop threshold, it is possible to prevent water from leaking out of the water tank and to prevent water leakage.

The eleventh embodiment is characterized in that, in any one of the fourth to tenth embodiments, the control unit executes a rotating operation for rotating at least one of the rotating tub and the pulsator at the same time as the wetting process.

Thereby, even when water can not be sprayed only in a part of the inside of the rotary tub, there is an effect that water can be uniformly sprayed to the laundry.

The twelfth embodiment is characterized in that, in the eleventh embodiment, the rotational speed of the rotating operation of the wetting stroke is 300 rpm or less.

The phenomenon of splashing water out is reduced as compared with the case where the rotation operation speed is set to a value exceeding 300 rpm, so that water leakage can be prevented.

The thirteenth embodiment is further characterized by any one of the first to twelfth embodiments, further comprising circulation means for spraying the water held in the water tank or the rotary tank to the upper side of the laundry in the rotary tank.

In addition, the washing step may be performed by performing a first rotating operation for rotating the rotating tub and the pulsator together, and spraying water, which is in the tub or rotating tub by the circulating means control, .

In this case, since the water flows downward from the upper side to the lower side of the laundry, the washing power is higher than in the case where only the rotating bath is rotated without spraying water onto the laundry.

The fourteenth embodiment is characterized in that, in any one of the first to thirtieth embodiments, the washing cycle includes a first rotating operation for rotating the rotating tub together with the pulsator and a second rotating operation for rotating only the pulsator And repeatedly performed alternately.

In this case, since the first and second rotary operations are repeatedly executed alternately, the laundry attached to the inner surface of the rotary tub is easier to fall off from the inner surface of the rotary tub than in the case where only the first rotary operation is performed.

The fifteenth embodiment is the air conditioning system according to any one of the first to fourteenth embodiments, further comprising an abnormality detecting means for detecting an abnormality in the washing machine, wherein the abnormality detecting means And stops rotation of the rotary tub when it is detected.

As a result, when the abnormality of the washing machine is detected, the rotation of the rotary tub is stopped, thereby preventing a problem caused by the abnormality.

The sixteenth embodiment is characterized in that, in any one of the first to fifteenth embodiments, it further comprises a display section for displaying the current state of the washing machine, wherein after the execution of the washing cycle, .

Further, the display section displays the humidification stroke and the air discharge stroke, and the display of the wet stroke and the air discharge stroke are displayed differently from those of the other strokes of the washing machine.

Thereby, there is an effect that the user can easily recognize whether the running stroke is the wetting stroke, the watering stroke or the other stroke by simply recognizing the display unit.

The 17th embodiment is the air conditioner according to any one of the first to 16th embodiments, further comprising detection means for detecting a predetermined physical quantity, wherein the control unit controls the air- And the weight of the laundry is calculated on the basis of the obtained physical quantity.

As a result, the weight of the laundry can be calculated based on the physical quantity detected at the time of the rotation operation, so that it is not necessary to perform a separate rotation operation to the motor for calculating the weight of the laundry, and the time required for washing can be shortened.

According to the present invention, since the air existing inside the laundry is discharged to the outside by the centrifugal force due to the air discharge stroke even if the laundry is a hair product, the laundry can be prevented from rising above the water surface, do.

1 is a sectional view of a washing machine according to a first embodiment of the present invention.
2 is a sectional view taken along the line II-II in Fig.
3 is a front view showing an embodiment of the display unit.
4 is a flowchart illustrating a washing operation sequence of the washing machine according to an embodiment of the present invention.
5 is a flowchart showing the sequence of operation of the washing machine in the wetting stroke according to an embodiment of the present invention.
6 is a flowchart showing the operation sequence of the washing machine in the air discharge stroke according to an embodiment of the present invention.
7 is a view showing a washing machine for performing a wetting stroke according to an embodiment of the present invention.
8 is a view showing a state of a washing machine for performing an air discharge stroke according to an embodiment of the present invention.
Fig. 9 is a graph showing the rotation speed of the rotary tub at the start of the motor in the spin-drying cycle. Fig.
10 is a graph showing the rotation speed of the rotary tub at the start of the motor in the air discharge stroke.
11 is a flowchart showing the washing operation sequence of the washing machine of the washing machine in the second embodiment.
12 is a sectional view of the washing machine according to the third embodiment.
13 is a cross-sectional view taken along the line XIII-XIII in Fig. 7, according to the fourth embodiment.
14 is a cross-sectional view taken along the line XIII-XIII in Fig. 7, according to the fifth embodiment.
15 is a sectional view of the washing machine according to the sixth embodiment.

The embodiments described in the present specification and the configurations shown in the drawings are preferred examples of the disclosed invention, and various modifications may be made at the time of filing of the present application to replace the embodiments and drawings of the present specification.

Also, the terms used herein are used to illustrate the embodiments and are not intended to limit and / or limit the disclosed invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as " comprise ", " comprise ", or "have ", when used in this specification, designate the presence of stated features, integers, Steps, operations, components, parts, or combinations thereof, whether or not explicitly described herein, whether in the art,

It is also to be understood that terms including ordinals such as " first ", "second ", and the like used herein may be used to describe various elements, but the elements are not limited by the terms, It is used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. In order to clearly explain the present invention in the drawings, parts not related to the description will be omitted.

(Embodiment 1)

Fig. 1 and Fig. 2 are cross-sectional views of a washing machine 1 according to Embodiment 1 of the present invention. Fig.

The washing machine 1 includes a water tub 5 provided in an outer frame 3 and an outer frame 3 and the water tub 5 can be formed in a cylindrical shape with one open. The water tank 5 can be suspended from the upper four corners of the outer frame 3 by a suspension bar (not shown) and a vibration preventing device (not shown) comprising a coil spring or a sliding ring.

Also. A cylindrical rotary tub 7, which is open to one side, is rotatably received in the water tub 5 in the same direction as the water tub 5. The diameter of the rotary tub 7 is about 650 mm and the depth is about 500 mm. A pulsator 9 for generating a water flow in the rotary tub 7 by rotation can be disposed on the inner bottom portion of the rotary tub 7.

The rotatable tub 7 is also referred to as a washing and dewatering apparatus as a space for washing and dewatering, and the pulsator 9 is also referred to as a rotating means in that it rotates to generate water flow. In the present specification, the rotary tub 7 and the pulsator 9 are referred to for convenience.

At the lower end of the sidewall of the water tray 5, an air trap 11 is provided protruding toward the outside direction. The air trap 11 is connected to a water level sensor 13 disposed above the hose 15. The water level sensor 13 can measure the water level in the vicinity of the air trap 11 in the water tank 5. [

The rotation of the current detection sensor 17a and the motor 17 is detected as a detection means for detecting the drive current of the motor 17 as a physical quantity in the lower part of the bottom wall of the water tank 5 The rotation state of the rotation sensor 18 and the motor 17 can be switched between a first state for transmitting the rotational force to both the rotary tub 7 and the pulsator 9 and a second state for transmitting only to the pulsator 9 The clutch mechanism 19 may be disposed. The motor 17 and the clutch mechanism 19 are rotated by the first rotary operation for rotating the rotary tub 7 together with the pulsator 9 and the second rotary operation for rotating the pulsator 9 only with the rotary tub 7 fixed Two rotation operation can be performed.

A water supply case 20 including a water supply pipe 21 may be provided at the center of the upper portion of the water tank 5 on the back side (the left and right direction in FIG. 1). A first water supply pipe 23 is connected to the water supply pipe 21 and the other end of the first water supply pipe 23 is connected to a water pipe (not shown).

The first water supply valve 25 is connected to the first water supply pipe 23. When the first water supply valve 25 is opened, tap water is supplied to the inside of the rotary tub 7 through the water pipe and the first water supply pipe 23 It flows towards. Therefore, the water supply pipe 21 includes the first water supply pipe 23 and the first water supply valve 25 to constitute a water supply means for supplying water into the water storage tank 5.

In addition, the water supply case 20 may be provided with a detergent case 22 having a detergent inlet 22a so as to be slidable.

The user can insert the detergent into the detergent case 22 using the detergent input port 22a and the detergent case 22 is pushed into the water supply case 20 so that the first water supply valve 25 The tap water including the detergent flows from the water supply pipe 21 toward the rotary tub 7.

The spray nozzle 34 is provided so as to spray water toward the side wall of the rotary tub 7 on the upper rear side of the water tub 5. [ One end of the second water supply pipe (24) is connected to the spray nozzle (34), and the other end of the second water supply pipe (24) is connected to a water pipe (not shown).

The second water supply valve 26 is connected to the second water supply pipe 24. When the second water supply valve 26 is opened, tap water flows from the spray nozzle 34 through the water pipe and the second water supply pipe 24, (About 4 liters per minute) toward the surface of the laundry in the drum 7. Therefore, the second water supply pipe 24 constitutes a wetting means as the second water supply valve 26 and the spray nozzle 34.

The bottom wall of the water tray 5 is provided with an outlet 27 through which water staying in the water tray 5 flows. The outer side of the water tray 5 is connected to a circulation pipe 29 extending in the vertical direction, And the lower end of the circulation pipe 29 is connected to the outlet 27.

A shower nozzle 33 is mounted on the upper portion of the circulation pipe 29 so as to face the side wall of the rotary tub 7 and a circulation pump 35 is installed in the vicinity of the outlet 27 of the circulation pipe 29 have. When the circulation pump 35 is driven, the water held in the water tank 5 flows from the shower nozzle 33 to the surface of the laundry in the rotating tub 7 via the outlet 27 and the circulation pipe 29, do. Therefore, the outlet 27, the circulation pipe 29, the shower nozzle 33, and the circulation pump 35 constitute circulation means.

A drain hole 28 through which water retained in the water tray 5 flows is formed at the bottom of the water tray 5 and the drain hole 28 is connected to a drain pipe 37. A drain pump 36 is provided near the drain port 28. When the drain pump 36 is driven, the water staying in the water tank 5 is drained through the drain hole 28 and the drain pipe 37. Therefore, the drain port 28, the drain pipe 37, and the drain pump 36 constitute drainage means.

An unbalance detecting sensor 41 as an abnormality detecting means for detecting an unbalance abnormality is mounted on the bottom surface of the water tub 5.

An optical sensor 42b for detecting the light from the light source 42a and the light source 42a is disposed in the upper portion of the inner surface of the rotary tub 7 in the direction opposite to each other with the rotary tub 7 interposed therebetween.

Further, as shown in Figs. 1 and 3, a display section 43 is provided on the upper side of the outer frame 3.

The display section 43 is constituted by, for example, a liquid crystal display. The display section 43 includes a remaining time display section 43a for displaying the remaining time until the end of washing, a display section 43b- 43f are provided. On the rear side of the display section 43, a control section 45 for controlling each operation of the washing machine 1 is disposed. The detailed operation of the control unit 45 will be described later with reference to FIG.

Next, the operation procedure of the washing machine 1 according to the embodiment of the present invention will be described with reference to FIG.

After the user puts the laundry into the rotary tub 7, the detergent is put into the detergent case 22, the detergent case 22 is pushed into the water supply case 20, ) 101, the control unit 45 calculates the weight of the laundry.

The weight of the laundry is based on the number of rotations sensed per unit time by the rotation sensor 18, with the clutch mechanism 19 in the first state. Specifically, the speed is increased within a predetermined time from the initial value 0 to a predetermined target value, and is calculated based on the value of the current detected by the current detection sensor 17a. Then, the process proceeds to step 102.

In step 102, the control unit 45 sets i = 0, and the process proceeds to step 103.

In step 103, the control unit 45 executes a wetting process (second process) for spraying water on the surface of the laundry contained in the rotary tub 7, and the process proceeds to step 104. In step 104, the control unit 45 , And an air discharge stroke (first stroke) for drawing out the air contained in the laundry in the rotary tub 7 is executed.

Therefore, in the present invention, the first stroke refers to a stroke for discharging the air contained in the laundry, and the second stroke refers to a stroke for spraying water on the surface of laundry to prevent air from penetrating into the laundry. In the description of the invention, the air discharge stroke and the wetting stroke are explained for convenience.

In step 105, the control unit 45 sets i = i + 1, and proceeds to step 106. [

In step 106, the control unit 45 determines whether or not i is equal to the predetermined threshold value N1 (? 1). If the i is equal to the predetermined threshold value N1 (? 1), the control unit 45 returns to step 107;

In step 107, the control unit 45 opens the first water supply valve 25 and executes a water supply stroke to water the water tank 5 to a predetermined set water level. The control unit 45 determines whether the water level in the water tank 5 is equal to or higher than a predetermined set water level based on the measurement result in the water level sensor 13 every predetermined time during the water supply. When it is determined that the water in the water tank 5 has reached a predetermined set water level, the first water valve 25 is closed to terminate the water supply. Then, the process proceeds to step 108.

In step 108, the control unit 45 executes the washing cycle. The control unit 45 drives the clutch 17 to the first state to drive the motor 17 for a predetermined time (first rotation operation), and simultaneously drives the circulation pump 35. [ The driving current of the motor 17 at this time is set so that the rotating bath 7 rotates at 60 rpm. Thereby, the rotary tub 7 rotates with the pulsator 9 at 60 rpm.

The water contained in the water tub 5 is driven by the circulation pump 35 to flow from the shower nozzle 33 through the outlet 27 and the circulation pipe 29 to the upper surface of the laundry in the rotary tub 7 Lt; / RTI > When a predetermined time has elapsed from the start of the motor 17, the control unit 45 opens the drain valve 39 to advance drainage. Then, the process proceeds to step 109.

In step 109, the control unit 45 executes a rinsing cycle in which the rinsing operation is performed on the washing machine 1 under the control of the first water supply valve 25, the motor 17, and the clutch mechanism 19. At the end of the rinsing cycle, the drain pump 36 is driven to discharge water.

In step 110, the control unit 45 sets the clutch mechanism 19 to the first state and drives the motor 17 for a predetermined time (first rotation operation) to rotate the rotary tub 7 together with the pulsator 9 And then the washing operation of the washing machine 1 is finished. The driving current of the motor 17 in the dewatering stroke is set so that the rotating bath 7 rotates at 900 to 1000 rpm. In addition, in the dewatering stroke, the drive current can be set such that, when the motor 17 is started, the rotation speed rises stepwise as shown in Fig.

During execution of the wet stroke and the air discharge stroke, the controller 45 causes only the first stroke display portion 43b of the first to fifth stroke display portions 43b to 43f to emit light, while the second stroke display portion 43c. During the rinsing cycle, only the third stroke display portion 43d is lit, and only the fourth stroke display portion 43e is lit during the dewatering stroke. When the washing operation of the washing machine 1 is finished, only the fifth stroke display portion 43f And emits light.

Next, the wetting stroke (second stroke) executed in step 103 will be described in detail with reference to Fig.

First, in step 201, the control section 45 drives the clutch 17 to the first state to drive the motor 17. [ Thereby, the rotary tub 7 rotates together with the pulsator 9, and the rotational speed of the rotary tub 7 and the pulsator 9 at this time is set to 300 rpm or less. For example, 20 to 60 rpm.

 Further, the controller 45 opens the second water supply valve 26. 7, water is sprayed from the atomizing nozzle 34 through the water pipe and the second water supply pipe 24 toward the top of the laundry in the rotary tub 7 at a rate of about 4 liters per minute. In this way, when water is sprayed while the rotary tub 7 is rotated together with the rotary tub 9, water to be sprayed can uniformly and evenly spread to the laundry, thereby improving the washing effect. Then, the process proceeds to step 202.

In step 202, the control unit 45 sets t = 0, and the process proceeds to step 203.

In step 203, the control unit 45 determines whether the water level in the water tank 5 is equal to or higher than a predetermined water supply stop threshold value, based on the measurement result by the water level sensor 13. [

If the water level in the water tank 5 does not exceed the predetermined water supply stop threshold value, the routine proceeds to step 204. If the water level in the water tank 5 is equal to or higher than the predetermined water supply stop threshold value,

The water supply stop threshold value is set to be lower than the set water level, that is, the water level in the washing cycle, and is set so as to prevent water from leaking from the water tub 5 when the rotary bath 7 is rotated at 500 rpm in the air discharge stroke. do.

In step S204, the control unit 45 sets t = t + 1, and the process proceeds to step S205.

In step S205, the control unit 45 determines whether or not t is equal to or greater than the predetermined threshold value N2 (? 2). If it is equal to or greater than the threshold value N2, the process proceeds to step S206.

In step 206, the control section 45 closes the second water supply valve 26 to stop the spraying of water, and ends the wetting stroke. At this time, the motor 17 is not stopped, and the rotation of the rotary tub 7 is continued.

In step 207, the control unit 45 determines whether or not the water level in the water tank 5 is equal to or higher than a predetermined water drainage threshold value, based on the measurement result of the water level sensor 13. [ However, the drainage threshold value is set to be higher than the water supply stop threshold value.

If the water level in the water tank 5 does not reach the predetermined water drainage threshold value or more, the routine proceeds to step 206. If the water level in the water tank 5 is equal to or larger than the predetermined water drainage threshold value,

In step 208, the control unit 45 closes the second water supply valve 26 to stop water supply, drives the drain pump 36 for a predetermined time to drain water, and proceeds to step 206.

In the first embodiment, both the judgment of step 203 and step 207 are carried out, but only one of them may be carried out.

Next, the air discharge stroke (first stroke) executed in step 104 will be described in detail with reference to Fig.

The control section 45 controls the drive current of the motor 17 while keeping the clutch mechanism 19 in the first state so that the rotational speed of the rotating drum 7 is reduced from the value at the wetting stroke to 500 rpm (First rotation operation).

In this case, the rotating tub 7 is rotated together with the pulsator 9 at a rotating speed of 500 rpm, so that the laundry is adhered to the inner circumferential surface of the rotating tub 7 as shown in Fig. 8, Is exited by the centrifugal force.

When the laundry is a hair product, when the rotation speed of the rotary tub 7 reaches about 150 rpm, the air starts to be compressed and air in the laundry starts to be released. Further, the control unit 45 sets k = 0 seconds. When the rotary tub 7 starts to rotate, the process proceeds to step 302. [

Since the rotating tub 7 is not stopped between the wetting process and the air discharging process, the time for stopping the tub 7, the time for confirming the stop of the tub 7, So that the washing time can be shortened. In addition, it is not necessary to restart the motor 17, so that power consumption can be reduced.

In step 302, the control unit 45 determines whether unbalance is detected by the unbalance detection sensor 41 or not. If unbalance is not detected, the process proceeds to step 303. If unbalance is detected, the process proceeds to step 305. [

In step 303, the control section 45 sets k = k + 1 seconds and proceeds to step 304. [

In step 304, the controller 45 determines whether k is equal to the threshold value N3 (> = 2) for a predetermined time. If they are equal, the process proceeds to step 305; otherwise, the process returns to step 302. [

In addition, since the amount of water contained in the laundry is small in the air discharge stroke process, the speed of the motor 17 can be rapidly raised as shown in Fig. 10 as compared with the speed of the motor 17 in the dewatering stroke.

It is also preferable that the rotational speed of the rotating bath 7 is raised to 300 rpm or more and 500 rpm or less. This is because if the rotational speed is less than 300 rpm, the air inside the laundry can not be sufficiently removed when the laundry is a hair product, and if the rotational speed exceeds 500 rpm, the time required for the air discharge stroke becomes longer, .

In step 305, the controller 45 causes the light source 42a to emit light, and when the light is detected by the optical sensor 42b, it is determined that the laundry has escaped from the rotary bath 7 and the process proceeds to step 306, If not, the process proceeds to step 307.

In step 306, the control section 45 controls the drive current of the motor 17 to stop the rotation of the rotary tub 7. The air discharge stroke is then terminated.

In step 307, the control section 45 sets k = 0 seconds, and the flow returns to step 302.

In the first embodiment, the end time of the air discharge stroke is controlled based on the elapsed time of the motor 17. However, the control may be performed based on conditions other than the elapsed time.

Therefore, according to the first embodiment, since the rotational speed of the rotary tub 7 is rotated at a rotational speed (500 rpm) higher than the rotational speed (60 rpm) in the washing cycle in the air discharge stroke, The air contained in the laundry can be effectively discharged because the air can be compressed on the inner surface of the rotary tub 7. Therefore, laundry can be prevented from rising above the water surface during washing, thereby increasing the washing power.

Particularly, when the laundry is arranged in a ring shape on the outer peripheral portion of the bottom portion of the rotary tub 7 at the time of inputting the laundry, the laundry is more uniformly compressed in the air discharge stroke, thereby enhancing the cleaning effect. Also in this case, unbalance is hardly detected, so that high-speed rotation of the rotary tub 7 for a predetermined time (time equivalent to N3) can be more reliably performed in the air discharge stroke.

Also, even if the laundry is a hair product, the gap of the yarn in the outer fabric woven with high density can be clogged with water by the wetting process, so that the air can be prevented from entering the inside of the laundry after the air discharging process.

Particularly, when the laundry is arranged in the ring shape on the outer peripheral portion of the bottom portion of the rotary tub 7 at the time of input of the laundry, water can be uniformly sprayed on the surface of the laundry so that the floating of the laundry can be prevented more effectively.

In addition, since the control unit 45 performs the wetting stroke before completion of the water supply stroke, it is possible to prevent air from intruding into the laundry after completion of the water supply stroke, thereby preventing the laundry from floating.

Further, in the wetting stroke, the rotational speed of the rotating bath 7 is set to 300 rpm or less, so that water can be prevented from splashing to the outside as compared with the case where the rotational speed is set to a value exceeding 300 rpm.

Further, by setting the water supply stop threshold value and the drainage threshold value, leakage in the air discharge stroke can be prevented.

Further, since the rotary tub 7 is rotated while spraying water from the upper side of the laundry in the washing cycle, the washing power is higher than when the rotary tub 7 is rotated without spraying water on the laundry.

Further, in the first embodiment, since the humidification process and the air discharge process are repeatedly performed, the air contained inside the laundry can be discharged more effectively.

Further, since different displays are made on the display section 43 for the other strokes except for the wet stroke and the air discharge strokes, the user can easily distinguish the stroke being executed by simply recognizing the display section 43 have.

Further, in the above-described embodiment, the display method for causing any one of the first to fifth display portions 43b to 43f to emit light is described. However, the display method is not limited to this, .

Further, in the case of step 305 of the first embodiment, even if the light from the light source 42a is blocked by the laundry discharged from the rotary tub 7 and is not detected by the photosensor 42b, Since the high-speed rotation continues, the washed laundry is likely to be attracted back into the rotary tub 7 by the high-speed rotation of the rotary tub 7. Therefore, even if the laundry is removed, the laundry can be washed with a high washing power by preventing the laundry from floating.

(Embodiment 2)

11 is a flowchart showing the operation of the washing machine 1 according to Embodiment 2 of the present invention

In the second embodiment, the step 101 is not executed after the start of washing by the user, and the weight of the laundry is calculated in step 301 at the start of the air discharge stroke.

Specifically, the control unit 45 changes the number of rotations (rotation speed of the rotatable tub 7) detected per unit time by the rotation sensor 18 from the initial value (a value corresponding to the rotation speed at the wet stroke) (A value corresponding to? 500 rpm) within a predetermined time, and calculates the weight of the laundry based on the value of the current detected by the current detection sensor 17a.

Other configurations and operations of the washing machine 1 are the same as those of the first embodiment, and thus the same components are denoted by the same reference numerals and the detailed description thereof is omitted.

Therefore, according to the second embodiment, the control unit 45 can calculate the weight of the laundry based on the driving current of the motor 17 detected during the rotation operation in the air discharge stroke. Therefore, It is not necessary to perform the rotating operation and the time required for washing can be shortened.

(Embodiment 3)

12 is a view showing a washing machine 1 according to a third embodiment of the present invention.

The spray angle? In the left-right direction of the spray nozzle 34 is set to 48 mm and the spray width W1 in the left-right direction of the water sprayed from the spray nozzle 34 to the bottom surface of the rotatable tank 7 Is set to be equal to the width W2 of the bottom surface of the rotatable tub 7.

A part of the water sprayed from the spray nozzle 34 is sprayed toward the side surface of the rotary tub 7 and the spray width in the vertical direction of the water sprayed to the side surface of the rotary tub 7 Is about 60% of the width H2 in the up-and-down direction.

Other configurations and operations of the washing machine 1 are the same as those of the first embodiment, and thus the same components are denoted by the same reference numerals and the detailed description thereof is omitted.

Therefore, according to the third embodiment, the sum of the injection width W1 in the left-right direction of the water jetted to the bottom surface of the rotary tub 7 and the injection width H1 in the vertical direction injected to the side of the rotary tub 7 Is set to 1/3 or more of the width W2 of the bottom surface of the rotatable tub 7, water can be jetted more widely onto the surface of the laundry than when it is set to be less than 1/3. Therefore, the amount of tap water required in the wetting process can be reduced.

(Fourth Embodiment)

13 is a view showing a washing machine 1 according to Embodiment 4 of the present invention.

The spray angle? In the front-rear direction of the spray nozzle 34 is set to 44 mm and the spray width W3 in the front-rear direction of the water sprayed from the spray nozzle 34 to the bottom surface of the rotary tub 7 Is set to be about 90% of the width W2 of the bottom surface of the rotary tub 7.

A part of the water sprayed from the spray nozzle 34 is sprayed toward the side surface of the rotary tub 7 and the spray width in the vertical direction of the water sprayed to the side surface of the rotary tub 7 is adjusted by the upper and lower Direction is about 60% of the width H2 of the direction.

Other configurations and operations of the washing machine 1 are the same as those of the first embodiment, and thus the same components are denoted by the same reference numerals and the detailed description thereof is omitted.

Therefore, according to the fourth embodiment, the sum of the spray width W3 in the front-rear direction of the water sprayed to the bottom surface of the rotary tub 7 and the spray width H3 in the vertical direction sprayed to the side surface of the rotary tub 7 Is set to 1/3 or more of the width W2 of the bottom surface of the rotatable tub 7, water can be jetted more widely onto the surface of the laundry than when it is set to be less than 1/3. Therefore, the amount of tap water required in the wetting process can be reduced.

(Embodiment 5)

14 is a view showing a washing machine 1 according to Embodiment 5 of the present invention.

In the fifth embodiment, the water supply pipe 21 is formed at one end in the left-right direction on the upper side of the water tub 5, so that water can be injected toward the inner side of the rotary bath 7. In step 201 of the wetting stroke, the first water supply valve 25 is opened instead of the second water supply valve 26, and the second water supply valve 26 is closed in step 206 and step 208, Water can be sprayed onto the surface of the laundry adhering to the inner surface of the drum 7. That is, in the fifth embodiment, the water supply means comprising the water supply pipe 21, the first water supply pipe 23, and the first water supply valve 25 also serves as the wetting means.

Other configurations and operations of the washing machine 1 are the same as those of the first embodiment, and thus the same components are denoted by the same reference numerals and the detailed description thereof is omitted.

Therefore, according to the fifth embodiment, since the wetting means need not be provided separately, the structure of the washing machine 1 is simplified. Therefore, the number of components and the number of assembly strokes can be reduced, thereby reducing manufacturing costs. In addition, since the water flowing from the water supply pipe 21 is directly sprayed onto the laundry attached to the inner surface of the rotary tub 7 in the water supply stroke, air can be prevented from entering into the laundry after the start of water supply, .

(Embodiment 6)

15 is a view showing a washing machine 1 according to Embodiment 6 of the present invention.

In the sixth embodiment, water is sprayed in the left-right direction of the water supply pipe 21, and the injection angle in the left-right direction of the water supply pipe 21 is set to 0 占 and the water sprayed on the bottom surface of the rotation tank 7 The spray width W5 in the lateral direction is set to approximately 40% of the width W2 of the bottom surface of the rotary tub 7.

Other configurations and operations of the washing machine 1 are the same as those of the fifth embodiment, and thus the same constituent elements are denoted by the same reference numerals, and detailed description thereof is omitted.

Therefore, according to the sixth embodiment, since the spray width W5 in the left-right direction of the water sprayed on the bottom surface of the rotary tub 7 is set to 1/3 or more of the width W2 of the bottom surface of the rotary tub 7, It is possible to disperse water on the surface of the laundry more widely than in the case where it is set to less than 1/3. Therefore, it is possible to efficiently make the tap water flow into the laundry, thereby reducing the amount of tap water required in the wetting process.

In the first to sixth embodiments, the clutch mechanism 19 is set to the first state in the washing cycle. However, the state of the clutch mechanism 19 can be changed to the second state and the contamination of laundry can be removed by rotating the pulsator 9 .

In the first to sixth embodiments, water is sprayed from the upper side of the laundry in the water tub 5 by driving the circulation pump 35 in the washing cycle. Water may be sprayed onto the surface of the laundry by raising the water surface by rotating the rotary tub 7 while keeping the water in the water tray 5. [

In this case, the rotating tub 7, the motor 17 and the clutch mechanism 19 constitute circulating means. In the washing cycle, the control unit 45 controls the motor 17 and the clutch 17 in place of the circulating pump 35, And controls the mechanism 19.

In the first to sixth embodiments, the air discharge stroke is executed before the start of the water supply stroke, but may be performed after the start of the water feed stroke before the completion of the water supply stroke.

In the first to sixth embodiments, the wetting process is executed before completion of the air discharge process, but can be executed at another time before the completion of the water supply process.

For example, between the air discharge stroke and the water supply stroke. In this case, at the end of the air discharge stroke, the control unit 45 does not stop the rotation of the rotary bath 7 at step 305, and at the start of the wetting stroke, To a value at the wet stroke.

The wetting step may be executed simultaneously with the air discharge stroke. In the case where the wetting stroke is executed simultaneously with the air discharge stroke, only the first stroke display portion 43b among the first to fifth stroke display portions 43b to 43f is caused to emit light so that the execution stroke is determined to be both the wet stroke and the air stroke Or a stroke excluding the wet stroke and the air discharge stroke.

In the first to sixth embodiments, the rotation of the rotary tub 7 is stopped in step 305 at the end of the air discharge stroke, but the rotation of the rotary tub 7 is stopped The speed can be lowered to 60 rpm from the value at the air discharge stroke. As a result, the time required for washing can be shortened. Further, since the rotary tub 7 rotates during the water supply, the water supplied can be evenly sprayed onto the laundry, so that the floating of the laundry is more reliably prevented.

In the first to fourth embodiments, the second water supply valve 26 is opened in the wetting process so that the water to be supplied is sprayed onto the surface of the laundry in the rotary tub 7 from the spray nozzle 34 .

However, before the wetting stroke is executed, the control unit 45 drives the circulation pump 35 after the opening of the first water supply valve 25 and the water supply stroke, and the circulation pipe 29 and the shower nozzle 33 Water can be sprayed onto the surface of the laundry.

As a result, the water supplied to the water tank 5 in the water supply stroke contains the detergent, so that the water containing the detergent can be sprayed onto the surface of the laundry in the wetting stroke. Therefore, even if the surface of the laundry is composed of a water repellent fabric having a high density, the detergent containing the surfactant is used, so that the laundry can sufficiently infiltrate the water. Therefore, it is possible to prevent air from intruding into the laundry after the air discharge stroke. In this case, the outlet port 27, the circulation pipe 29, the shower nozzle 33, and the circulation pump 35 constitute wetting means, and the control unit 45 controls the wetting stroke .

In this case also, when the water level detected by the water level sensor 13 is equal to or higher than the predetermined water supply stop threshold value during the water supply stroke execution, the water supply stop control for closing the first water supply valve 25 and the water level sensor 13 When the detected water level is equal to or higher than the predetermined drainage threshold value, drainage control for driving the drain pump 36 can be performed.

In addition, either the water supply stop control or the drain control can be performed.

 In the first to fourth embodiments, the first water supply valve 25 may be temporarily opened during the wetting process so that water containing detergent may be supplied from the water supply pipe 21 into the rotary tub 7. Thus, even if the surface of the laundry is composed of a water-repellent cloth having a high density, it is possible to sufficiently infiltrate the laundry by using a detergent containing a surfactant.

In the first to fourth embodiments, the detergent may be included in the water sprayed from the spray nozzle 34.

In the first to sixth embodiments, the user can input the start of washing after spraying the detergent directly on the laundry in the rotating tub 7, without installing the detergent case 22. As a result, since the detergent is mixed with the water sprayed in the wetting process, even if the surface of the laundry is composed of a water-repellent cloth having a high density, the detergent containing a surfactant can be used to sufficiently infiltrate the laundry.

In addition, in the wetting stroke, the water surface between the rotating tub 7 and the side surface of the water tub 5 can be raised to spray water on the surface of the laundry. In such a case, the rotating tank 7, the motor 17 and the clutch mechanism 19 constitute the wetting means, and the control unit 45 can execute the wetting stroke by controlling the motor 17 and the clutch mechanism 19 .

In the first to sixth embodiments, the control section 45 drives the motor in the first rotation operation in the washing cycle, but the first and second rotation operations can be alternately repeated. In such a case, the laundry adhered to the inner surface of the rotary tub 7 more easily falls from the inner surface of the rotary tub 7 in the air discharge stroke, as compared with the case where the motor is driven only by the first rotary operation, .

In the first to sixth embodiments, the pulsator 9 is rotated in a state where the rotary tub 7 is fixed. However, the pulsator 9 may be rotated relative to the rotary tub 7 As shown in FIG. For example, the rotary tub 7 and the pulsator 9 may be rotated in opposite directions.

In the first to sixth embodiments, the diameter of the rotary tub 7 is set to 650 mm and the depth is set to 500 mm. However, the rotary tub 7 can have different sizes. For example, the diameter of the rotary tub 7 may be 450 mm and the depth may be 500 mm.

When the relative centrifugal force is RFC, the gravitational acceleration is g, the turning radius is r, and the rotating speed of the rotating tub 7 is N, the centrifugal force applied to laundry in the air discharge stroke is calculated by the following equation.

(Equation 1) RFC ㅧ g = 2 ㅧ ㅧ ㅧ r ㅧ N2 / 60

Therefore, when the diameter of the rotary tub 7 is set to 450 mm and the depth is set to 500 mm, that is, when the diameter of the rotary tub 7 is set to about 0.7 times as large as that in the first to sixth embodiments, A relative centrifugal force approximately equal to the shape can be obtained. In this case, it is preferable to increase the rotational speed to 360 to 600 rpm in the air discharge stroke.

In Embodiments 1 to 6, when unbalance is detected in the air discharge stroke, the control unit 45 stops the motor 17 but notifies the user of the unbalance in the air discharge stroke, Or the unbalance correction stroke may be executed by controlling the motor 17 and the clutch mechanism 19, or may be restarted from the step 101.

The above-described first to sixth embodiments are also applicable to the washing machine 1 in which water is retained only in the rotary tub 7.

In the first to sixth embodiments, step 302 is a step of setting the foam detecting means for detecting the amount of foam in the rotary tub 7 inside the washing machine 1, and the controller 45, It is possible to judge whether or not the amount of bubbles is detected. The object to be detected may be other than an unbalanced or excessive amount of foam.

In Embodiments 1 to 6, both of the rotary tub 7 and pulsator 9 are rotated in Step 201, but only one of them can be rotated.

Although the spraying time N2 of the water in the wetting process is made unchanged in the first, third and sixth embodiments, when the weight of the laundry calculated in step 101 is equal to or greater than the predetermined threshold value, When the weight of the laundry calculated in step 101 is less than the predetermined threshold value, N2 may be set to a second value smaller than the first value.

In this case, when the weight of the laundry is less than the predetermined threshold, the spraying time of the water in the wetting stroke is shortened, so that the consumption of water and electric power can be reduced and the time required for washing can be shortened.

In the first, third, and sixth embodiments, the rotational speed of the rotary tub 7 in the air discharge stroke is set to 500 rpm. However, the rotational speed of the rotary tub 7 may be set based on the weight of the laundry calculated in step 101, As shown in FIG.

In the first to sixth embodiments, the weight of the laundry is set such that the value of the current detected by the current detection sensor 17a when the rotational speed of the rotary tub 7 is raised from the predetermined initial value to the predetermined target value for a predetermined time It can be calculated based on the value of the current detected by the current detection sensor 17a when the rotation speed of the rotating bath 7 is lowered from the predetermined initial value to the predetermined target value for a predetermined time.

 The time required for the number of rotations (rotation speed) detected by the rotation sensor 18 in a predetermined unit time from a predetermined initial value to a predetermined target value when a predetermined drive current is given to the motor 17 , And can be calculated based on other physical quantities detected by other detecting means in the air discharge stroke.

In the first to sixth embodiments, when the laundry has escaped from the opening of the rotary tub 7 in the air discharge stroke, the control unit 45 sets k = 0 seconds at step 307 and returns to step 302, It is possible to notify the abnormality by the notifying means or to stop the operation of the washing machine 1. [

The control unit 45 may also perform another operation for pulling the washed laundry out of the rotary tub 7 by turning the clutch mechanism 19 to the second state and driving the motor 17 to rotate only the pulsator 9, , And it is possible to return to the step 102 after draining in the step 307. [ Even in this case, the detergent is not contained in the water sprayed in the wetting stroke, and the detergent is not included in the water drained in the step 307, so that the detergent may not be wasted.

If the amount of change in the water level before and after the predetermined amount of water is supplied based on the detection result of the water level sensor 13 in the water supply stroke of the control unit 45 according to the first to sixth embodiments is greater than or equal to a predetermined amount, It is judged that the water does not permeate the air, and the air discharge stroke of the step 104 can be executed again.

In the first to sixth embodiments, the motor rotates the pulsator 9, but instead of the pulsator 9, a disk member such as a disk member rotatably mounted on the inner bottom portion of the rotatable tub 7, The pulsator can be rotated.

In the first to sixth embodiments, the rotational speed of the rotary tub 7 and pulsator 9 of the washing cycle is set to 60 rpm. However, the rotational speed can be set to be selected from a plurality of speeds, The rotational speed of the rotating tub 7 can be set higher than the selected rotational speed in the washing cycle in the stroke.

In addition, in the fourth embodiment, the amount of tap water sprayed by the spray nozzle 34 can be increased as the rear side (the right side in Fig. 13), that is, the outer circumference side of the rotary bath 7 is. As a result, in step 101, the tap water is sprayed mainly on the laundry attached to the inner surface of the rotary tub 7 by the rotation of the rotary tub 7, so that the tap water can be uniformly sprayed onto the laundry.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has been described in detail with reference to the drawings.

In the case of a conventional washing machine, if the laundry is a feather product which is likely to contain air, the laundry floats on the surface of the laundry in the process of removing the air inside the laundry, There is a problem that can not be done.

However, according to the present invention, since the air existing in the laundry is discharged to the outside by the centrifugal force due to the air discharge stroke even if the laundry is a hair product, the laundry can be prevented from rising above the water surface, exist.

Although the embodiments have been described with reference to specific embodiments and drawings, various modifications and variations may be made by those skilled in the art without departing from the scope of the present invention. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced. Therefore, other embodiments and equivalents to the claims are within the scope of the following claims.

The present invention is useful as a single water tank washing machine having a function of discharging air contained in laundry.

1: Washing machine 5: Water tank (outer water tank)
7: Rotation tank (theta and dewatering tank) 9: Pulse generator (rotating member)
13: water level sensor 17: motor (rotating means)
17a: current detecting sensor 19: clutch mechanism
21: water pipe 23: first water pipe
24: second water pipe 25: first water valve
26: second water supply valve 27: outlet
28: Drain 29: Circulation tube
33: Shower nozzle 34: Spray nozzle
35: Circulating pump 36: Drain pump
37: Water pipe 41: Unbalance detection sensor
43: Display section 45:

Claims (20)

A rotary drum for receiving the laundry;
A water supply pipe for spraying water onto the surface of the laundry;
And a control unit for controlling the operation of the rotary tub and the water supply pipe and performing a water supply stroke for supplying water to the rotary tub and a laundry stroke for washing the laundry,
Wherein,
And performs a first stroke to rotate the rotary tub at a speed higher than the rotation speed in the washing cycle to discharge the air contained in the laundry before the water supply stroke is completed. The method according to claim 1,
Wherein,
And when the first stroke is completed, performs a second stroke of spraying water onto the surface of the laundry. The method according to claim 1,
Wherein,
And a second step of spraying water onto the surface of the laundry before starting the first stroke, or performing the first stroke and the second stroke at the same time. The method according to claim 1,
Wherein,
And performs a first stroke before the water supply stroke starts. 3. The method of claim 2,
Wherein,
And controls the water supply pipe so that water is sprayed to the inner surface of the rotary tub. 6. The method of claim 5,
Wherein,
And controls the water supply pipe so that water is sprayed from an upper portion of the rotary tub to a lower portion of the rotary tub. 6. The method of claim 5,
Wherein,
Wherein the water supply pipe controls the water supply pipe so that the jetting height of the water sprayed to the inner surface of the rotating tub by the water supply pipe is 60or more than the rotating tub height or the jet width of the water jetted onto the bottom surface of the rotating tub is 90 And controls said water supply pipe to be a pro or more. 3. The method of claim 2,
Further comprising a pulsator located inside the rotating vessel,
And the second stroke includes an operation in which at least one of the rotary tub and pulsator rotates. 9. The method of claim 8,
The washing cycle includes:
And a first operation in which the pulsator rotates so that water in the rotating tub flows down from the upper side to the lower side of the laundry. 10. The method of claim 9,
The washing cycle includes:
Wherein the rotary tub is fixed and a second operation in which only the pulsator rotates and the first operation are alternately repeated. 9. The method of claim 8,
Wherein the speed of the rotary tub or the pearl sate in the second stroke is not less than 10 rpm and not more than 300 rpm. The method according to claim 1,
Wherein the speed of the rotating bath in the first stroke is 300 rpm or more and 500 rpm or less. The method according to claim 1,
The water supply pipe,
A first water supply pipe for supplying water to the rotary tub; and a second water supply pipe for spraying water on the surface of the laundry. The method according to claim 1,
And a detector for detecting the weight of the laundry based on the speed of the rotary tub. The method according to claim 1,
Further comprising a display unit for displaying a state of the washing machine,
Wherein the display unit displays the first stroke and the second stroke separately from other strokes performed by the washing machine. A water supply step of supplying water to the rotary tank;
And a washing and washing step of washing laundry contained in the rotary tub
And a first administrative step of rotating the rotary tub at a speed higher than the rotational speed of the laundry in order to discharge the air contained in the laundry before the water supply step is completed. 17. The method of claim 16,
And a second step of spraying water onto the surface of the laundry when the first stroke is completed. 17. The method of claim 16,
And a second step of spraying water onto the surface of the laundry before the first stroke is started. 17. The method of claim 16,
Wherein the speed of the rotating bath in the first stroke is 300 rpm or more and 500 rpm or less 18. The method of claim 17,
Further comprising the step of displaying the first and second strokes separately from other strokes performed by the washing machine.

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