KR20140136745A - Control mathod of washing machine - Google Patents

Abstract

A method for controlling a washing machine according to the present invention, which is a method for controlling a washing machine including an outer tub containing washing water, an inner tub disposed inside the outer tub to be rotated and receiving clothes, and a pulsator disposed on the bottom of the inner tub to be rotated and having a plurality of ribs protruding upward, comprises: a scrubbing step of rotating the pulsator alternately in both directions while controlling the driving and stopping of the pulsator to be repeated in a range in which the clothes are moved in a centripetal direction by the friction with the pulsator; and a hitting step of controlling the driving and stopping of the pulsator to be repeated so that the pulsator is rotated alternately in both directions while controlling the angular velocity of the pulsator to be higher than that in the scrubbing step and controlling the driving time of the pulsator to be longer than that in the scrubbing step.

Description

[0001] CONTROL MATHOD OF WASHING MACHINE [0002]

The present invention relates to a control method of a washing machine.

Generally, a washing machine refers to various devices that treat a cloth by applying a physical action and / or a chemical action to a laundry (hereinafter referred to as "foam") such as clothing and bedding. The washing machine includes an outer tank in which washing water is contained, an inner tank in which a bag is placed and rotatably installed in the outer tank, and in particular, a pulsator is rotatably provided on the bottom of the inner tank, The frictional force separates the contamination from the bubble. Therefore, the washing power is greatly influenced by how the rotation of the pulsator is controlled.

The positional fluctuation of the bags in the inner tank is also performed by the physical force (for example, frictional force) caused by the rotation of the pulsator or the washing water flow formed in the inner tank, The rotation of the pulsator must be finely controlled, because it must be evenly dispersed in the inner tank. The rotation of the pulsator is closely related to how even the detergent is dissolved evenly in the washing water.

Therefore, it is very important to control the pulsator in an appropriate manner in order to maximize the washing power by inducing positional fluctuation of the cloth in a proper form and allowing the detergent to be uniformly dissolved in the cloth. In a conventional washing machine, There is a problem such as deterioration of washing power, twisting of the pods and generation of eccentricity due to this.

A problem to be solved by the present invention is to provide a control method of a washing machine in which a moving pattern of a cloth in an inner tank is varied.

A control method of a washing machine according to the present invention is a method of controlling a washing machine comprising an outer tank in which washing water is contained, an inner tank in which the thermoplastic material rotatably disposed in the outer tank is accommodated, and a plurality of ribs rotatably disposed on the bottom of the inner tank, A method of controlling a washing machine including a pulsator, the method comprising: rotating the pulsator alternately in both directions, within a range in which the pulsator can be moved in the centrifugal direction by a frictional force acting between the pulsator and the pulsator, The driving and stopping of the driving motor is controlled so as to be repeated; Wherein the pulsator is controlled so as to be repeatedly driven and stopped so that the pulsator is rotated alternately in both directions, wherein an angular velocity of the pulsator is larger than that of the pulsator, Lt; RTI ID = 0.0 > longer < / RTI >

Alternatively, the method of controlling a washing machine of the present invention may include: an outer tub containing washing water; an inner tub which is rotatably arranged in the outer tub; and a plurality of ribs, which are rotatably disposed on the bottom of the inner tub, Wherein the pulsator is rotated alternately in both directions so that the pulsator can be moved in the centrifugal direction by the frictional force acting between the pulsator and the pulsator, Controlling the pulser to be repeatedly driven and stopped; A first water level adjustment step of adjusting the water level in the inner tank to be increased; Wherein the pulsator is controlled so as to be repeatedly driven and stopped so that the pulsator is rotated alternately in both directions, wherein an angular velocity of the pulsator is larger than that of the pulsator, Lt; RTI ID = 0.0 > longer < / RTI >

The control method of the washing machine of the present invention can improve the fluidity of the fabric in the inner tank through the non-fabricating step, and friction between the fabric is smoothly generated during the process, It is effective. Further, in this non-skid step, the detergent is dissolved evenly, thereby improving the washing power by the chemical action of the detergent.

In addition, the control method of the washing machine of the present invention is characterized in that after the contamination source of the laundry is called to some extent through the non-boiling step, or after the laundry is excited, the pulsator performs a striking step, Therefore, the contamination source is positively removed by the strong physical force, and the improved washing performance can be obtained.

1 shows a washing machine according to an embodiment of the present invention.
Fig. 2 shows the bottom surface and pulsator of the inner tank of Fig. 1;
FIG. 3 illustrates a method of controlling a washing machine according to an embodiment of the present invention.
Fig. 4 shows the drive unit control during the stirring rotation of the pulsator.
Fig. 5 shows a skew motion.
6 illustrates a washing machine control method according to another embodiment of the present invention.
7 shows a washing machine according to another embodiment of the present invention.
Fig. 8 shows the bottom surface and pulsator of the inner tank of Fig. 7;

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 shows a washing machine according to an embodiment of the present invention. Fig. 2 shows the inner bottom surface and pulsator of Fig. 1. Fig. FIG. 3 illustrates a method of controlling a washing machine according to an embodiment of the present invention. Fig. 4 shows the drive unit control during the stirring rotation of the pulsator. Fig. 5 shows a skew motion.

1, a washing machine 1 according to an embodiment of the present invention includes a cabinet 11 having an upper opening, a base 12 for supporting the cabinet 11, A door 14 which is coupled to the top cover 13 and rotates and opens and closes the pull-in / take-out hole, a door 14 which receives various control commands from the user, And a control panel 25 for providing a user interface such as displaying operation information of the mobile terminal 1.

Inside the cabinet 11, there is provided an outer tank 26 which is suspended through a support member 15. The support member 15 is connected to the outer tub 26 by a suspension 16 so as to attenuate vibrations generated during washing.

Water supplied from an external water source such as a faucet flows through the water supply channel 23, and the water thus introduced is supplied by the water supply unit 24. The water supply unit 24 may include at least one water supply valve for interrupting the flow of the water introduced through the water supply channel 23 and water supplied through the water supply channel 23 when the water supply valve is opened by the water supply valve And flows to the outer tank 26 via the detergent box 22.

The detergent box 22 may contain a detergent, a fabric softening agent, and / or a laundry additive such as a bleaching agent, and may contain laundry detergent additives required for each of the laundry during the washing, rinsing, And is supplied into the outer tank 26. Accordingly, water mixed with water or a washing additive may be supplied into the outer tank 26 during the operation of the washing machine 1, and the 'washing water' referred to hereinafter includes all the water or the water mixed with the washing additive .

The inner tank (30) is rotatably provided in the outer tank (26). The inner tub 30 may include a base portion 31 coupled with the rotary shaft 17 and a cylindrical side portion 32 coupled with the base portion 31. A plurality of water holes 33 are formed in the side surface portion 32 so that wash water can flow between the inner tank 30 and the outer tank 26. The base portion 31 may include a bottom surface 31a and ribs 31b projecting from the bottom surface 31a. (See Fig. 8)

A pulsator (40) can be rotatably provided below the inner tub (30). The pulsator 40 may include a rotating plate 41 and ribs 42 protruding from the rotating plate 41. The ribs 42 may extend radially on the rotary plate 41 and may have a plurality of ribs.

The rotary shaft 17 may include a washing shaft (not shown) for rotating the pulsator 40 and a dehydrating shaft (not shown) which is aligned coaxially with the washing shaft to rotate the inner tub 30. The dewatering shaft may be a hollow shaft and the washing shaft may be formed inside the dewatering shaft.

The driving unit 18 may include a motor for generating rotational force as an apparatus for rotating the inner tank 30 and / or the pulsator 40. And a clutch mechanism for selectively rotating the inner tub 30 and the pulsator 40 by transmitting the rotational force of the motor.

 The washing shaft and the dewatering shaft are coupled or separated by the operation of the clutch mechanism (not shown). Only the pulsator 40 is rotated in the state where the washing shafts and the dewatering shafts are separated by the clutch mechanism. When the washing shafts and the dewatering shafts are coupled by the clutch mechanism, the pulsator 40 and the inner tub 30 are integrally rotated.

At this time, the pulsator 40 can be continuously rotated in one direction, and rotated alternately in both directions. Hereinafter, alternating rotation of pulsator 40 in both directions is defined as " stirring rotation ".

By rotating the pulsator 40, the contamination of the pulp can be effectively removed by the friction between the pulsator 40 and the pods. In this case, pulsators (not shown) 40 may be agitated and rotated.

The driving unit 18 can be divided into a direct driving method and an indirect driving method according to a method of transmitting the rotational force of the motor. The present embodiment discloses a direct drive system in which the inner tank and the pulsator are directly coupled to the rotary shaft 17 of the motor. However, the indirect drive system transmits the rotational force of the motor through a power transmission means such as a belt or pulley. The method is also possible.

On the other hand, the washing machine 1 further includes a drain portion for draining wash water from the outer tub 26. The drainage section may include a drainage valve 19 for interrupting the discharge of the washing water from the outer tank 26 and a drainage pump 21 provided on the drainage passage 20 for draining the washing water in the outer tank 26 have.

2 through 5, among the various forces acting on the foil L _A during rotation of the pulsator 40, the frictional force F 1 acting between the pulsator 40 and the load A friction force F3 acting between the base portion 31 of the inner tub 30 and the centrifugal force F4 caused by the movement in the circumferential direction of the foam and a buoyancy F5 ). The dynamic relationship between these forces determines the movement of the gun, which is dominated by the drive pattern of the pulsator 40.

More specifically, referring to Fig. 4, pulsator 40 may be alternately rotated in both directions repeatedly driving and stopping. For example, the pulsator 40 may be driven in the clockwise direction (CW), then stopped and then driven in the counterclockwise direction (CCW). Hereinafter, the time at which the pulsator 40 is driven is referred to as a drive time or ON time, and the time at which the pulsator 40 is stopped is defined as a stop time or an OFF time.

4 shows an example of a method of controlling the driving (ON) and the stopping (OFF) of the driving unit 18 according to time during the stirring rotation of the pulsator 40, (T _ON ), and then stops during the off-time (T _OFF ).

The control method of the washing machine according to the embodiment of the present invention can control the driving pattern of the pulsator 40 in a specific form by controlling the _ON time T _ON and the OFF time T _OFF in various ways. The flow pattern of the bubble in the inner tub 30 is changed according to the drive pattern of the pulsator 40, and the following bubble motion, stroke motion, and rotation motion are examples of the flow pattern of such a bubble.

MOTION Angular velocity (RPM) ON / OFF Time (sec) Level (L) Rub RPM ₁ 100 to 140 T ₁₁ 0.4 to 1.2 L ₁ 1/3 to 1/2 T ₁₂ 0.5 to 0.8 strike RPM ₂ 110 ~ 150 T ₂₁ 1.0 to 1.4 L ₂ 1/2 to 3/4 T ₂₂ 0.2 to 0.6 swing RPM ₃ 90 to 140 T ₃₁ 1.0 to 1.4 L ₃ 3/4 to 1 T ₃₂ 0.8 to 1.0

Table 1 shows the angular velocity (RPM), ON time, OFF time, and water level (L) of the pulsator 40, which is suitable for the skip motion, the stroke motion, and the rotation motion .

Referring to FIG. 3, a method of controlling a washing machine according to an exemplary embodiment of the present invention includes a step S1 for generating a non-skid motion, a step S2 for generating a skate motion, a step S2 for generating a skid motion, And step S3. Hereinafter, each of the motions will be described in more detail.

 Fig. 5 shows a skew motion. The rubbing motion causes the friction between the pellets in the inner tank 30 to be smoothly performed, so that the same effect as rubbing the pellet with the hand is generated.

Referring to Figure 5, PO (L _A) in the base portion 31 of the inner tank 30 is subjected to frictional force (F1) having a centripetal direction component by contact with the pulsator 40. At this time, the magnitude of the frictional force (F1) will be affected by the contact area of the shape and the pulsator 40 and the fabric (L _A) of the pulsator 40, the washing machine 1 according to one embodiment of the present invention A plurality of ribs 42 are projected on the rotating plate 41 coupled to the rotary shaft 17 so that the contact area of the pulsator 40 can be widened.

5, the circulation direction of the bellows in the inner tub 30 in the non-bending motion is determined by the centrifugal force generated when the pulsator 40 rotates, (In the direction of B to C in the central portion C of the inner tank 30 and in the direction of D to A in the inner side of the inner tank 30), and the displacement of the dogs is caused by overturning of the dogs Therefore, this type of cyclic movement is hereinafter referred to as an " inverse toroidal rollover motion ".

The reason why the vertical reverse circulation motion is generated is that the movement of the foil L _A in the lower part of the inner tank 30 is made in the center core direction and the space created by the movement of the foil L _A in the core- (L _B ) located at the upper side is lowered and filling causes continuous movement of the bags.

More specifically, in the inner tank 30 and the fabric (L _A) located at the boundary of the pulsator (40), (friction force acting by the pulsator 40), the friction force F1 act between the frictional force F3 (the inner tank 30 which shall friction) and sufficient to overcome the binding force (or frictional force) of the fabric (L _a) of the centrifugal direction by the centrifugal force (F4). Four dynamics between the forces acting on the (L _A), since the influence on the angular speed of the pulsator 40, in order to cause the vertical reverse rotation motion to be the angular speed of the pulsator 40 is set in the jeokjeokhan range.

The appropriate range, that is, the angular speed (RPM ₁₎ range for Tit motion is included on the extent to which the resultant force acting on the (L _A) can be and has a centripetal direction component, preventing the fabric twist from within the inner tub 30 . In particular, the lower limit of the angular speed (RPM ₁₎ for the Tit motion is to be a resultant force is approximately gateul the centripetal direction component acting on the fabric (L _A).

The upper limit of the angular velocity RPM ₁ is closely related to the degree of dispersion of the pellets in the inner tank 30. Since the pulsator 40 is rotated at the lower portion of the inner tub 30, the speed of movement of the bag (or the speed of the water flow) at the lower portion of the inner tub 30 and the speed of movement The speed difference between the upper and lower parts of the inner tub 30 is increased and the twisting of the pulleys is induced.

In particular, (hereinafter referred to as a rotation angle.) Circumferential angle change amount in accordance with a one cycle (with one driving and one stop of) the pulsator 40 is rotated when, PO (L _A) is more pulsator 40 It should be done within a small range. For example, the pulsator 40, the on-time is driven once in the clockwise direction (CW) for (T _11), is stopped during the off-time (T _12), counter-clockwise for another on-time (T ₁₁₎ ( CCW), the gun is also rotated in clockwise and counterclockwise directions, in which case the gun can be rotated by inertia during off-time. At this time, when the flow in the circumferential direction of the bobbin is excessive, the rotation of the bobbin is restricted within a certain range because it inhibits the flow in the vertical direction relatively. In other words, the angular velocity of the pulsator 40 during on time, the length of the on time (T ₁₁ ), the length of the off time (T ₁₂ ), and the like must be set appropriately in view of driving control of the pulsator 40.

The angular speed RPM ₁ of the pulsator 40 during on time T ₁₁ must be greater than the angular velocity of the gun. The angular velocity of the gun was based on the same rotational direction as the pulsator 40. In this case, during the on-time (T ₁₁₎ were included it will have a movement relative speed between not rotated integrally with the pulsator 40, with the pulsator 40. At this time, the movement of the can is mainly performed by a drag acting between the pulsator 40 and the rib 42.

It is preferable that the upper limit of the angular velocity RPM ₁ of the pulsator 40 during the on time T ₁₁ is set in consideration of the heat generation of the driving unit 18. Motor-driven drivers, commonly referred to as IPMs, have circuit elements that generate heat upon application of current. Therefore, the upper limit of the angular velocity (RPM ₁ ) should be set within a range in which the temperature of the IPM does not rise above a predetermined allowable value. Considering the above factors, it is preferable that the angular velocity (RPM ₁ ) of pulsator 40 during on-time is 100 to 140 rpm.

The lower limit of the on time T ₁₁ should be at least a time sufficient for the pulsator 40 to rotate with relative speed to the gun and the upper limit should be at most the maximum speed at which the relative speed between the gun and pulsator 40 can be maintained It should be shorter than time. That is, the length of the on-time T ₁₁ must be determined within a range in which the bag is rotated integrally with the pulsator 40 at a relative speed.

In general, the motion of a rigid body follows the displacement of a source acting on the force itself. Since the force is mainly used to overcome the inertia of the rigid body in the initial stage when the force is applied to the rigid body from the source, A certain amount of time must elapse before balance with the motion of the circle. In view of the above, when the dog is moved by the drag force acting from the pulsator 40 in the inner tank 30, the drag acting from the pulsator 40 at the beginning of the on time (T ₁₁ ) Or is moved in unison with the pulsator 40 at the lower portion of the inner tub 30 because it is used to accelerate the pulsator 40 or to change the traveling direction of the bag moved by inertia during the off time T ₁₂ . Thereafter, when the pulsator 40 continues to rotate, the pawl rotates in the same direction as the pulsator 40 at any point in time, but the angular velocity of the pulsator 40 is larger than the angular velocity of the pulsator 40, The relative motion is generated in the section where the relative motion occurs. Another point to note is the relative movement between the pulsator and the pulsator 40, in which the direction of rotation of pulsator 40 and the direction of rotation of the pulsar are opposite. This phenomenon is caused when the pulsator 40 which has been rotated in one direction is stopped and then rotated in the opposite direction. Since the pulsator continuously rotates to the general direction by inertia during the stop time of pulsator 40 , There is a section where the rotation direction of the next drive (CCW) of the pulsator 40 is opposite to the rotation direction of the pulsator 40.

The upper limit of the on-time (T ₁₁ ) is considered within a range in which the interval in which the angular velocity of the pulsator (40) is larger than the angular velocity of the gun is not released. That is, if the on-time T ₁₁ continues, the pod may again be rotated at a higher speed following the angular velocity of the pulsator 40, either integrally or even by rotating water flow, And is a factor that hinders the generation of backward vertical circulation motion. In consideration of the various factors mentioned above, the on-time T ₁₁ is preferably 0.4 to 1.2 seconds (s).

The length of the off-time (T ₁₂ ) is related to the time it moves by inertia. During off-time (T ₁₂ ), the bob is rotated by inertia. The shorter the off-time (T ₁₂ ), the faster the inertia of the bob is overcome. For example, when the pulsator 40 is driven in the clockwise direction for the on time (T ₁₁ ), for the off time (T ₁₂ ) and then in the counter-clockwise direction for the on time (T ₁₁ ) During the off-time (T ₁₂ ), the bobbin is rotated in the clockwise direction by the inertia, and preferably the next on-time (T ₁₁ ) comes while the bobbin is rotated by the inertia, (40). Therefore, the length of the off-time (T ₁₂ ) should be as short as possible, but not longer than the time when the gun rotated by inertia is naturally stopped. In consideration of the various factors described above, the off-time T ₁₂ is preferably 0.5 to 0.8 seconds (s).

On the other hand, the rough motion is also influenced by the level or the amount of the discharge. If the water level is too low, the movement of the bubble in the vertical direction becomes obstructed. When the water level is too high, the friction force F ₁ between the bubble and pulsator 40 is reduced by the increase of the buoyancy F ₅ , The flow of the can is not smooth. It is preferable that the water level is 1/3 to 1/2 of the height of the cloth placed in the inner tank 30. [

Hereinafter, stroke motion will be described.

In the stroke motion, the ribs 42 of the pulsator 40 pass over the cloth, the cloth is hardly moved, and as the rotating direction of the pulsator 40 is changed, the movement of the cloth is limited within a predetermined range In the form of a vibration or a reciprocating motion. Therefore, there is an effect that seems to be swallowed or swallowed.

In the stroke step S2, the angular velocity of the pulsator 40 should be controlled to be greater than the angular velocity of the gun. However, the lower the water level, the greater the influence of the drag force acting on the bob from the pulsator 40, the more the bob movement follows the rotation of pulsator 40. For example, the ribbon 42 of the pulsator 40 is rotated in a state in which the bag is attached. In this case, since the pulsator 40 is not rotated by the gun, a certain level of buoyancy is required to act on the gun so that the load on the pulsator 40 needs to be reduced. However, when the water level is too high, the load acting on the pulsator 40 is excessively reduced as the buoyancy acting on the pulp is increased, and the relative speed between the pulsator and the pulsator 40, The shape of the ribs 42 passing through the cloth is not smoothly induced. Therefore, the water level should be controlled to an appropriate level, and it is preferable that the water level is such that about 1/2 to 3/4 of the water in the inner tank 30 can be locked.

In particular, it is preferred as compared to stroke the above-described step (S1), the non-device stage (S2) in the angular speed of the pulsator (40) is faster than the control (RPM _2> RPM _1), the water level also is higher than control . (L ₂ > L ₁ )

The on-time T ₂₁ should be set within an appropriate size, the lower limit must be greater than the minimum time allowed for the pulsator 40 to swing and rotate, and the upper limit should be less than the maximum time taking into account the IPM temperature rise.

As in the foregoing Tit step (S1), the shorter the off time (T ₂₂₎ is easy to make the relative velocity between the Po and pulsator, which is advantageous in the implementation of the stroke motion. The shorter the off-time (T ₂₂ ), the faster the inertia of the gun is removed.

The on-time (T ₂₁ ) and the off-time (T ₂₂ ) may vary depending on the amount of waste. This is because the load applied to the pulsator 40 varies depending on the amount of waste.

It is preferable that the on time (T ₂₁ ) is set longer as the battery capacity increases. This is because the pulsator 40 needs a longer time to overcome the inertia of the gun and to hit and strike.

Off-time (T ₂₂₎ is preferably larger amount of fabric set shorter. Since the inertia of the gun is also increased if the gun is large, it is necessary to make the driving of the pulsator 40 to follow quickly in order to eliminate inertia of the gun.

The on-time T ₂₁ and the off-time T ₂₂ may vary depending on the water level. This is because the magnitude of the buoyant force acting on the can varies with the water level.

It is preferable that the on-time T ₂₁ is set longer as the water level is lower. The lower the water level is, the greater the load applied from the capsule to the pulsator 40, and therefore the pulsator 40 and the pulsator have relative speeds and are difficult to move, so that the pulsator 40 must be driven for a longer period of time .

Off-time (T ₂₂₎ is preferably the higher the water level set shorter. As the water level increases, the movement along the circumferential direction is developed due to the inertia of the bell due to the effect of the rotating water flow. Therefore, in order to remove the bell movement according to the inertia, It is necessary to do.

The angular velocity (RPM ₂ ), on-time (T ₂₁ ), off time (T ₂₂ ), and water level (L ₂ ) shown in Table 1 are set in consideration of these various factors. According to the applicant's experiment, 150 rpm, an on-time of 1.0 to 1.4 sec, an off-time of 0.2 to 0.4 sec, and a water level of 1/2 to 3/4 of a tow height set in the inner tank (30).

Hereinafter, the turning motion will be described.

In the swirl motion, the swirl of the swirl occurs in such a manner that the swirl angle of the swirl becomes greater than the swirl angle of the pulsator 40. Since the swinging motion is smoothly rotated in the same direction as the swinging pulsator 40, the swinging motion is prevented and the washing is performed by the friction acting between the inner swinging drum 30 and the inner swinging drum 30.

In the twisting motion, the lower limit of the angular velocity (RPM ₃ ) of the pulsator 40 during on time is the minimum velocity at which the pulsator 40 can move the bubble. That is, the pulsator 40 should not be moved out of the pulp as in the stroke motion, but must be able to be pushed by the drag acting from the pulsator 40.

The upper limit of the angular speed RPM ₃ of the pulsator 40 is preferably set in consideration of the heat generated by the driving unit 18. [ The upper limit can be set within a range in which the IPM temperature is not raised above the predetermined allowable value.

The on time T ₃₁ should be set within an appropriate size such that the lower limit of the on time T ₃₁ must be longer than the minimum time it takes to start moving integrally with the pulsator 40, It should be smaller than the maximum time considered.

Off-time (T ₃₂₎ is preferably set longer than the time it takes to stop the carriage is rotated by inertia. The off-time T ₃₂ can be set longer than in stroking motion. Off-time (T ₃₂₎ is shorter, and because the pulsator 40, before the inertia of the removed capsule is carrying out the next driving, the stroke motion can be induced. Therefore, in order to stop the blower moved by the inertia due to the drive (CW) of the pulsator 40 performed before the blower 40 is stopped before the drive (CCW) of the next blower 40 is performed, (T ₃₂ ) preferably has a sufficient length.

It is preferable that the on-time T ₃₁ is set longer as the volume is larger. The larger the amount, the longer it takes for the gun to accelerate.

Off-time (T ₃₂₎ is preferably set longer the greater the amount of fabric. The larger the amount, the greater the inertia of the gun, so it takes longer to stop the gun.

The on-time T ₃₁ and the off-time T ₃₂ may vary depending on the water level. This is because the magnitude of the buoyant force acting on the can varies with the water level.

The on-time T ₃₁ is preferably set to be longer as the water level is lower. When the water level is low, buoyant force acting on the cannula is small, and since the cannon gradually absorbs the water as time goes by (hereinafter, the amount of water absorbed by the cannon is called the moisture amount) Since the pulsator 40 must be driven for a longer time until the rotation motion is developed. The load applied to pulsator 40 is closely related to power consumption and IPM temperature rise. Therefore, it is desirable to maintain the level above the appropriate level.

It is preferable that the off-time T ₃₂ is set to be longer as the water level is higher. The higher the water level is, the longer the rotating water flow develops and the more time it takes for the rotating water to stop due to the inertia.

The angular velocity (RPM ₃ ), on-time (T ₃₁ ), off time (T ₃₂ ), and water level (L ₃ ) described in Table 1 are set in consideration of these various factors. According to the applicant's experiment, 140 rpm, an on-time of 1.0 to 1.4 seconds, an off-time of 0.8 to 1.0 second, and a water level of 3/4 to 1 day of the bath height set in the inner tank (30).

On the other hand, the parameters in the respective steps shown in Table 1, namely, the angular speed (RPM), the on time (On Time), the off time (OFF / Time), the water level (L) . That is, the above variables must be considered together when defining the motion. Therefore, although the pulsator 40 rotates in the same angular velocity range, different motions may be implemented depending on the setting values of other variables. For example, in a section where the pulse rate of the pulsator 40 is 110 to 140 rpm, either the non-skid motion or the striking motion can be implemented. However, what motion is generated in the angular velocity band is again a problem to be determined in consideration of the on-time, the off-time, the water level, and / or the volume. More specifically, when the rotation of the pulsator 40 is controlled at 120 rpm in both the non-skid motion and the stroke motion, skew motion is induced in the case of on-time of 0.4 seconds, and stroke motion in case of 1.4 seconds . Furthermore, even if the on-time is 1.0 second (within the on-time setting range in the skipping step and within the on-time setting range in the scoring step), the motion can be determined again according to the off-time set value, If the water level or volume is also taken into account, even if some of the variables in Table 1 are the same, different motions can be induced by the values of the remaining variables. Therefore, it should be understood that the values of the variables described in Table 1 describe the range in which the corresponding motion is implemented. In order to induce a desired motion, the values of the variables are again It should be chosen appropriately.

Referring to FIG. 3, a method of controlling a washing machine according to an embodiment of the present invention includes a skew step S1 and a stroke step S2.

The skewer S1 is a step of causing the skewer motion to alternately rotate the pulsator 40 in both directions so that the frictional force acting between the pulsator of the inner tank 30 and the pulsator 40 causes the skewer The driving and stopping of the pulsator 40 is controlled so as to be repeated.

Stroke step S2 is a step for inducing stroke motion in which pulsator 40 is alternately rotated in both directions so that pulsator 40 generates a larger angular velocity (RPM ₂ > RPM ₁ , And the pulsator 40 is controlled to have a longer driving time (T ₂₁ > T ₂₁ ).

In the cleaning step S1, the detergent is dissolved evenly, and washing power such as rubbing by the friction between the pellets can be realized. Thereafter, in the striking step S2, contaminants are actively separated from the captive body by the impact force applied to the fabric from the pulsator 40, thereby improving the washing power.

After the stroke step S2, the turning step S3 may be further performed. The bag is smoothly rotated in the inner tank 40 and is continuously washed by the frictional force acting between the inner tank 30 and particularly the side surface portion 32. The striking step S2 can minimize the damage of the papillon, compared with the stitching step S1 or the striking step S2, and has an effect of spreading the wrinkles. In particular, it is important not only to improve the washing performance but also to minimize the damage of the cloth in the washing of the cloth. In order to improve the washing power, increasing the number of steps S1 or S2 increases the damage of the laundry. Therefore, the steps S1 and S2 are performed to remove the detergent sufficiently. And after the sufficient physical force is applied by the friction between the pellets or the force applied from the pulsator 40, the pellet damage is minimized by performing the turning step S3, and a certain level of washing power is continuously applied Can be maintained

3, the angular velocity, on-time, off-time, water level, and volume of the pulsator can be determined as described in the above-described bobbin motion, stroke motion, The scope of which may also be applied, and the description thereof will be given in the foregoing.

6 illustrates a method of controlling a washing machine according to another embodiment of the present invention. Referring to FIG. 6, the water level adjustment step S11 is a step of adjusting the water level suitable for inducing the nibble motion and controlling at least one of the water supply unit 24 and the drainage units 19 and 21, So that the water level in the water is L ₁ .

The angular velocity RPM, on-time T _ON and off-time T _OFF of the pulsator 40 are RPM ₁ and T ₁₁ shown in Table 1, respectively, , T ₁₂ , and the description thereof will be made as described above with respect to the non-skid motion, and a detailed description thereof will be omitted.

The water level control step S13 controls at least one of the water supply unit 24 and the drainage units 19 and 21 so that the water level in the inner tank 30 becomes L ₂ . At this time, the water level L _{2 in the} inner tank 30 is preferably higher than the non-boiling step S12. (L ₂ > L ₁ )

The angular speed RPM, on-time T _ON and off-time T _OFF of the pulsator 40 are RPM ₂ and T ₂₁ shown in Table 1, respectively, , T ₂₂ , and the description thereof will be made in accordance with the above description of stroke motion, and a detailed description thereof will be omitted.

The water level adjustment step S15 controls at least one of the water supply unit 24 and the water drainage units 19 and 21 to adjust the water level suitable for causing the twisting motion so that the water level in the inner tank 30 becomes L ₃ . At this time, it is preferable that the water level L _{3 in the} inner tank 30 is higher than the stroke level S13. (L ₃ > L ₂ )

The angular velocity RPM, ON time T _ON and OFF time T _OFF of the pulsator 40 are RPM ₃ and T ₃₁ shown in Table 1, respectively, , T ₃₂ , and the description thereof will be made in accordance with the above description of stroke motion, and a detailed description thereof will be omitted.

7 shows a washing machine according to another embodiment of the present invention. Fig. 8 shows the bottom surface and pulsator of the inner tank of Fig. 7; Hereinafter, description of the components having the same reference numerals as those shown in FIG. 1 will be described in the foregoing, and only differences will be described.

7 to 8, the washing machine 2 according to another embodiment of the present invention differs from the washing machine 1 described above in the constitution of the pulsator 140.

The pulsator (140) includes an inner pulsator (50) and an outer pulsator (60) rotated at different angular speeds. It is preferable that the rotation directions of the inner pulsator 50 and the outer pulsator 60 are opposite to each other. Hereinafter, the inner pulsator 50 and the outer pulsator 60 are rotated in opposite directions.

The inner pulsator 50 may include an inner rotating plate 51 and an inner rib 52 protruding from the inner rotating plate 51. The inner ribs 52 extend radially on the inner rotating plate 51 and may be provided with a plurality of inner ribs 52. [

The outer pulsator 60 may include an outer rotating plate 61 and an outer rib 62 protruding from the outer rotating plate 61. The outer ribs 62 may extend radially on the outer rotating plate 61 and be provided with a plurality of outer ribs 62.

The base portion 31 of the inner tub 30 may include a bottom surface 31a and ribs 31b projecting from the bottom surface 31a.

The inner pulsator 50 and the outer pulsator 60 can be rotated at different angular speeds. The angular velocity ratio of the inner pulsator 50 to the outer pulsator 60 is preferably in the range of 2: 1 to 3 (the angular velocity of the inner pulsator 50) : ≪ / RTI >

The washing machine 2 provided for rotating the inner pulsator 50 and the outer pulsator 60 at different angular velocities strengthens the frictional action by the pulsator 140 so as to rotate the inner pulsator 50 and the outer pulsator 60 in the centrifugal direction So that the flow of the bubble can be more actively performed.

Since the inner pulsator 50 and the outer pulsator 60 are rotated in opposite directions, the rotation of the pulsator is mainly performed by the inner pulsator 50 having a high angular velocity, but the inertia caused by the rotation is transmitted to the outer pulsator (60) attenuates a certain level, it is possible to more actively induce stroke motion.

Further, considering that the rotating water flow generated by the pulsator 140 is diverted in the centrifugal direction together with the rotation thereof, although the rotation of the outer pulsator 60 is somewhat hindering the rotation motion, Is mainly influenced by the rotation of the inner pulsator 50, and the induction of the rotation motion is also possible.

The control methods of the washing machine described above with reference to Figs. 1 to 6 can be applied to the washing machine 2 according to the present embodiment as it is. However, the angular velocity RPM is the angular velocity of the inner pulsator 50, The angular velocity of the data 60 depends on the angular velocity ratio.

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 scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

Claims (16)

A control method for a washing machine, comprising: an outer tub containing washing water; an inner tub which is rotatably disposed in the outer tub; and a pulsator rotatably disposed on the bottom of the inner tub and having a plurality of ribs protruded upward In this case,
Wherein the pulsator is rotated alternately in both directions so that driving and stopping of the pulsator are repeated so that the pulsator can be moved in the centrifugal direction by a frictional force acting between the pulsator and the pulsator; And
Wherein the pulsator is controlled such that driving and stopping of the pulsator are repeated so that the pulsator is alternately rotated in both directions, wherein an angular velocity of the pulsator is larger than that in the non-booming step, and a time when the pulsator is driven is compared with the non- And a control step of controlling the washing machine. The method according to claim 1,
In the stroke step, the time at which the pulsator is driven and the time at which the pulsator is stopped,
Wherein the pulsator is set within a range in which a rotation direction of the pulsator is opposite to a rotation direction of the pulp during driving of the pulsator. The method according to claim 1,
Wherein the time at which the pulsator stops at the stroke step,
Wherein the control unit controls the washing machine in such a manner that the washing time of the washing machine is shorter than the time taken for the washing machine to rotate by the inertia. The method of claim 3,
Wherein the time at which the pulsator stops at the stroke step,
Wherein the pulsator in the non-bypassing step is shorter than the stopping time of the pulsator in the non-bypassing step. The method according to claim 1,
The water level in the non-
Wherein the height of the tub is 1/3 to 1/2 of the height of the tub set in the inner tank. The method according to claim 1,
Wherein,
Wherein the washing step is performed at a higher water level than the non-washing step. The method according to claim 6,
The water level in the above-
Wherein the height of the inside of the tub is 1/2 to 3/4 of the height of the top of the tub. The method according to claim 1,
Wherein the pulsator is rotated alternately in both directions so that driving and stopping of the pulser are repeated so that the pulsator's angular velocity becomes equal to or greater than the angular velocity of the pulsator during driving of the pulsator, Further comprising the step of controlling the washing machine. 9. The method of claim 8,
In the turning step, the time at which the pulsator is stopped,
Wherein the pulsator is stopped when the pulsator is stopped in the stroke step. 10. The method of claim 9,
In the turning step, the time at which the pulsator is stopped,
A method of controlling a washing machine, the method comprising the steps of: 11. The method of claim 10,
Wherein,
Wherein the washing step is carried out at a higher water level than the step of blowing. 12. The method of claim 11,
The water level in the stone-
Wherein the washing machine has a height of 3/4 to 1 of the height of the laundry settled in the inner tank. A control method for a washing machine, comprising: an outer tub containing washing water; an inner tub which is rotatably disposed in the outer tub; and a pulsator rotatably disposed on the bottom of the inner tub and having a plurality of ribs protruded upward In this case,
Wherein the pulsator is rotated alternately in both directions so that driving and stopping of the pulsator are repeated so that the pulsator can be moved in the centrifugal direction by a frictional force acting between the pulsator and the pulsator;
A first water level adjustment step of adjusting the water level in the inner tank to be increased; And
Wherein the pulsator is controlled such that driving and stopping of the pulsator are repeated so that the pulsator is alternately rotated in both directions, wherein an angular velocity of the pulsator is larger than that in the non-booming step, and a time when the pulsator is driven is compared with the non- And a control step of controlling the washing machine. 14. The method of claim 13,
A second water level adjusting step of adjusting the water level in the inner tank to be increased after the striking step; And
Wherein the pulsator is rotated alternately in both directions so that driving and stopping of the pulser are repeated so that the pulsator's angular velocity becomes equal to or greater than the angular velocity of the pulsator during driving of the pulsator, Further comprising the step of controlling the washing machine. 15. The method according to any one of claims 1 to 14,
The pearl-
And an outer pulsizer rotated in association with the inner pulsator and rotated in a direction opposite to the inner pulsator. 16. The method of claim 15,
Wherein the angular velocity ratio of the inner pulsator to the outer pulsator is 2: 1 to 3: 1.

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