KR20110022497A - Control method of laundry machine - Google Patents

Abstract

PURPOSE: A control method of a laundry machine is provided to increase washing performance and make cloths, which are inside a drum, be uniformly wet. CONSTITUTION: A control unit supplies washing water to the inside of a tub(S310). The control unit opens a water supply valve. The control unit circulates washing water while driving a drum(S330). The control unit drives a drum in a tumbling motion mode, a rolling motion mode, or a swing motion mode. The control unit heats the washing water inside the tub(S350). The control unit circulates washing water by a circulation pump(S370).

Description

Control method of laundry machine {Control method of laundry machine}

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

The washing machine generally includes a washing stroke, a rinsing stroke and a dehydrating stroke. Here, the washing administration includes a water supply step, a bubbling step, a heating step, and the like, and there are a number of problems that impair washing performance at each step.

The present invention provides a control method for solving the above problems.

The object of the present invention as described above is achieved by a control method of a washing apparatus comprising a washing stroke comprising at least one water supply step of driving the drum by scrub motion when water is fed into the tub.

As described above, the control method according to the present invention can improve the washing performance by evenly less cloth in the drum when water supply.

Hereinafter, with reference to the accompanying drawings will be described in detail a control method according to the present invention. First, the laundry apparatuses to which the control method according to the embodiment of the present invention can be applied will be described with reference to the drawings, and then the control method will be described.

1 shows a first embodiment of a washing apparatus to which a control method according to an embodiment of the present invention can be applied.

Referring to Figure 1, the washing apparatus 100 is provided in the cabinet 10, the cabinet 10 to form an appearance, the tub 20 to accommodate the wash water, rotatably provided inside the tub 20 It may include a drum (30).

The cabinet 10 forms an appearance of the washing apparatus 100, and various components described later may be mounted to the cabinet 10. First, the door 11 is provided at the front of the cabinet 10, so that the user can open the door 11 to inject laundry objects into the cabinet 10.

A tub 20 for accommodating the wash water is provided in the cabinet 10, and a drum 30 for accommodating the laundry object inside the tub 20 may be rotatably provided. In this case, the inside of the drum 30 may be provided with a plurality of lifters 31 for lifting the laundry object to fall back down when the drum 30 is rotated.

The tub 20 is supported by the spring 50 at the top. On the other hand, the rear of the tub 20 is equipped with a drive motor 40 for rotating the drum (30). That is, the driving motor 40 is provided on the rear wall of the tub 20 to rotate the drum 30. Accordingly, when the driving motor 40 rotates the drum 30 to generate vibration in the drum 30, the tub 20 also vibrates in conjunction with the drum 30 in the washing apparatus according to the first embodiment. . When the drum 30 rotates, vibration generated in the drum 30 and the tub 20 may be absorbed by the lower damper 60.

Meanwhile, the tub 20 and the drum 30 may be provided in parallel with the base of the cabinet 10 as shown in FIG. 1, or the rear side of the tub 20 and the drum 30 may be provided. It may be provided to be inclined downward. This is because the front part of the drum 30 and the tub 20 is more advantageous when the user puts laundry into the drum 30.

The front and / or rear of the drum 30 is provided with a ball balancer 70 for balancing in order to suppress the vibration of the drum 30 when the drum rotates, especially when the drum rotates at high speed. . The ball balancer will be described later in detail.

Figure 2 is a partially exploded perspective view of a washing apparatus according to a second embodiment of the present invention, Figure 3 shows a combined cross-sectional view of FIG.

2 and 3, in the washing apparatus, a tub 12 is fixedly supported to a cabinet. The tub 12 includes a tub front 100 constituting the front portion and a tubular 120 constituting the rear portion. The tub front 100 and the tubular 120 are assembled by screws, and form a space in which the drum is accommodated. Tubular 120 has an opening in the rear. The inner circumference of the rear side of the tuber 120 is connected to the outer circumference of the rear gasket 250. The inner circumference of the rear gasket 250 is connected to the tub back 130. Tub back 130 has a through-hole is formed through the rotation axis in the center. The rear gasket 250 is made of a flexible material so that the vibration of the tubback 130 is not transmitted to the tubere 120.

The tubular 120 has a rear surface 128. The rear surface 128, the tub back 130, and the rear gasket 250 of the tubular 120 constitute a rear wall surface of the tub. The rear gasket 250 is connected to the tub back 130 and the tubular 120 so as to be respectively sealed to prevent the wash water from leaking in the tub. The tubback 130 vibrates with the drum when the drum rotates, and is spaced apart from the tubere 120 at a sufficient interval so as not to interfere with the tubere 120. Since the rear gasket 250 is made of a flexible material, the tubback 130 allows relative movement without interfering with the tubular 120. The back gasket 250 may have a pleat 252 that may extend to a sufficient length to allow such relative movement of the tubback 130.

The front portion of the tub front 100 is connected to the foreign matter prevention member 200 for preventing foreign matter from flowing between the tub and the drum. Foreign matter trapping member 200 is made of a flexible material, is fixed to the tub front (100). Foreign matter trapping member 200 may be made of the same material as the rear gasket (250). Foreign matter trapping member 200 is referred to as a front gasket for convenience.

The drum 32 includes a drum front 300, a drum center 320, a drum bag 340, and the like. In addition, ball balancers 310 and 330 are installed at the front and rear portions of the drum, respectively. The drum bag 340 is connected to the spider 350, and the spider 350 is connected to the rotation shaft 351. The drum 32 rotates in the tub 12 by the rotational force transmitted through the rotation shaft 351.

The rotary shaft 351 is directly connected to the motor 170 through the tub back 130. Specifically, the rotor 174 and the rotation shaft 351 of the motor 170 are directly connected. The bearing housing 400 is coupled to the rear surface of the tub back 130. The bearing housing 400 rotatably supports the rotation shaft 351 between the motor 170 and the tub back 130.

The stator 172 is fixed to the bearing housing 400. Then, the rotor 174 is positioned surrounding the stator 172. As described above, the rotor 174 is directly connected to the rotation shaft 351. The motor 170 is an outer rotor type motor and is directly connected to the rotation shaft 351.

The bearing housing 400 is supported through the suspension unit from the cabinet base 600. The suspension unit 180 includes three vertical supports and two inclined supports that are inclinedly supported in the front-rear direction.

The suspension unit 180 may include a first cylinder spring 520, a second cylinder spring 510, a third cylinder spring 500, a first cylinder damper 540, and a second cylinder damper 530. .

The first cylinder spring 520 is connected between the first suspension bracket 450 and the base 600. The second cylinder spring 510 is connected between the second suspension bracket 440 and the base 600.

The third cylinder spring 500 is directly connected between the bearing housing 400 and the base 600.

The first cylinder damper 540 is inclined between the first suspension bracket 450 and the base rear portion, and the second cylinder damper 530 is inclined between the second suspension bracket 440 and the base rear portion. have.

The cylinder springs 520, 510, 500 of the suspension unit 180 may not be connected to the cabinet base 600 in a completely fixed manner but may be connected to allow a certain degree of elastic deformation to allow the drum to move forward and backward and to the left and right. That is, it is elastically supported to allow some degree of rotation in the front and rear and left and right with respect to the support point connected to the base 600.

The vertical installation of the suspension can be configured to elastically dampen the vibration of the drum and the tilted installation can be configured to damp the vibration. That is, the vertically installed in the vibration system including the spring and the damping means serves as the spring and the obliquely installed may act as the damping means.

The tub front 100 and the tubular 120 are fixed to the cabinet 110, and the vibration of the drum 32 is buffered and supported by the suspension unit 180. Substantially, the support structure of the tub 12 and the drum 32 may be separated, and the tub 12 may not be oscillated even when the drum 32 vibrates.

The bearing housing 400 and the suspension brackets are connected by the first weight 431 and the second weight 430.

The cabinet 110 has a water supply line 722 connected to an external water source such as a faucet. The control unit controls the water supply valve 720 on / off to supply the wash water into the tub 12 through the water supply line 722. An end of the water supply line 722 is connected to the front of the tub 12 or the front gasket 200 to supply the washing water from the front of the tub 12 to the inside. On the other hand, when the water supply is provided with a detergent container 710 along the water supply line 722, it is possible to supply a detergent together.

On the other hand, the tub 12 may be provided with a circulation pump 730. The circulation pump 730 circulates the wash water discharged from the tub 12 through the circulation line 744 and supplies it back into the tub 12. In the laundry apparatus according to the second embodiment, when the washing water is to be circulated by the circulation pump 730, the valve 732 is adjusted to connect the circulation pump 730 and the circulation line 744. An end of the circulation line 744 is connected to the front of the tub 12 or the front gasket 200 to supply the washing water from the front of the tub 12 to the inside. In addition, when the wash water is to be drained from the tub 12, the circulating pump 730 and the drain line 742 are connected to drain the wash water. Although not shown in the drawings, it is also possible to have a circulation pump for circulating the wash water and a drain pump for draining the wash water, respectively. In this case, the circulation line and the drain line are connected to the circulation pump and the drain pump, respectively.

Meanwhile, the tub 12 and the drum 32 may be installed to be parallel to the base 600 or to be inclined at a predetermined angle with respect to the base 600. In this case, it is preferable that the tub 12 and the rear portions of the drum 32 are inclined downward so that a user can more easily inject laundry into the drum 32.

On the other hand, when the laundry object 1 is accommodated in the drums 30 and 32 and the drums 30 and 32 are rotated in the washing apparatus according to the above-described embodiments, the noise depending on the position of the laundry object 1 And vibration may occur greatly. For example, when the drums 30 and 32 rotate (hereinafter, referred to as “eccentric rotation”) in a state in which laundry objects are not evenly distributed in the drums 30 and 32, vibration and noise may be greatly generated. In particular, vibration and noise may be a problem when the drums 30 and 32 are accelerated at high speed for dewatering.

Therefore, the washing apparatus may be provided with ball balancers 70, 310, 330 to prevent vibration and noise caused by the eccentric rotation of the drum (30, 32). One ball balancer 70, 310, 330 may be provided at the front side or the rear side of the drum 30, 32, or may be provided at the front side and the rear side, respectively.

Ball balancers 70, 310, 330 are mounted on the rotating drum (30, 32) serves to reduce the eccentricity. Therefore, the ball balancers 70, 310, 330 is preferably configured to be able to move the center of gravity variably. That is, the ball balancers 70, 310, and 330 may include balls 72, 312, and 332 having a predetermined weight therein, and the balls may include a path movable along the circumferential direction.

Specifically, the balls are rotated by the friction force as the drums 30 and 32 are rotated. The balls rotate at a different speed than the drum because they are not constrained to the drum when the drum is rotating. However, eccentric laundry can adhere to the drum inner wall and rotate at about the same speed as the drum due to sufficient friction and lift of the drum inner wall. Thus, the rotational speed of the laundry and the rotational speed of the balls are different. As a result, the rotational speed of the laundry becomes faster than the rotational speed of the balls at the relatively low speed of rotation when the drum starts to rotate. Precisely, the rotational angular velocity is fast. In addition, the phase difference between the ball and the laundry, that is, the phase difference with respect to the center of rotation of the drum, is continuously changed.

Then, as the rotational speed of the drum becomes faster, the balls are brought into close contact with the outer circumferential surface of the movement path by centrifugal force. At the same time, the balls are aligned at a position where the laundry and phase difference are approximately 90 ° to 180 °. When the rotational speed of the drum is greater than or equal to a predetermined value, the centrifugal force is increased so that the frictional force between the circumferential surface and the balls becomes a predetermined value or more, and the balls rotate with the same rotational speed as the drum. In this case, the balls are rotated at the same speed as the drum while maintaining a position where the phase difference from the laundry is 90 ° to 180 °, preferably approximately 180 °. In the present specification, when the balls are rotated with a predetermined position on the drum as described above, it will be referred to as an 'eccentric counterpart' or 'ball balanced'.

Therefore, when the load by the laundry object is biased on one side of the drum (30, 32), the ball inside the ball balancer (70, 310, 330) can be moved to the eccentric counterpart position to reduce the eccentricity.

On the other hand, the drum in the above-described washing apparatus may be driven in various forms. That is, the driving motion of the drum may be appropriately determined according to each stroke in the washing stroke, the rinsing stroke, the dehydrating stroke, or the like, or the driving motion of the drum may be appropriately determined according to the characteristics of the course selected by the user. Hereinafter, various drum driving motions applicable to the control method of the present invention will be described in detail.

4 is a view illustrating various drum driving motions. 4 is a schematic view from the front of the drum to illustrate the rotation of the drum. In addition, in Figure 4 in order to explain the position of the laundry according to the rotation angle of the drum, the drum is divided into four equal parts in the counterclockwise direction, respectively defined as one quadrant, two quadrants, three quadrants and four quadrants.

Referring to Figure 4, the drum driving motion is implemented by a combination of the rotational direction, rotational speed and angle of rotation of the drum. In addition, the laundry located inside the drum by the drum driving motion is changed in the dropping direction, the time of dropping and the amount of impact during the drop. In addition, the flow of laundry inside the drum is changed. Various drum drive motions can be implemented by controlling the drive motor to rotate the drum.

On the other hand, the laundry is raised by the lift 31 (see Fig. 1) (132, Fig. 3) provided on the inner peripheral surface of the drum during rotation of the drum, so that the laundry is applied to the laundry by controlling the rotation speed, rotation direction and angle of rotation of the drum. Losing impact can be different. In other words, the mechanical force applied to the laundry, such as friction between the laundry, friction between the laundry and the wash water, and dropping impact of the laundry may be changed, whereby the degree of tapping or rubbing the laundry for washing may be changed. In addition, by controlling the rotational speed, the rotational direction and the rotational angle of the drum, it is possible to vary the degree of dispersion or turnover of laundry in the drum.

Therefore, in the control method of the washing machine, various drum driving motions are provided, and the drum driving motions are changed according to the detailed steps of the type of laundry, the degree of contamination of the laundry, each stroke, and each stroke, so that the laundry can be cleaned with the optimum mechanical force. It can be processed. In addition, it is possible to improve the washing efficiency of the laundry. In addition, the time required due to the optimum drum driving motion can be reduced.

On the other hand, the drive motor has a type that is directly connected to the rotating shaft of the drum, and a type for transmitting the rotational force to the drum through a pulley or the like. However, in order to implement various drum driving motions, the driving motor 170 is preferably made of a type directly connected to the drum. This is to prevent the time delay or backlash as much as possible when controlling the rotation direction, torque, etc. of the drive motor so that the movement of the drive motor is immediately transmitted to the drum.

The drum driving motion includes a rolling motion, a tumbling motion, a step motion, a swing motion and a scrub motion. Hereinafter, each motion will be described in detail with reference to the accompanying drawings.

4 (a) is a view showing a rolling motion. In FIG. 4, the rotational direction, the rotational angle, and the movement of the laundry inside the drum are illustrated to explain each driving motion.

Referring to (a) of FIG. 4, in the rolling motion, the driving motor 170 continuously rotates the drum 32 in one direction, and the laundry on the inner circumferential surface of the drum is positioned at a position less than about 90 ° along the rotational direction of the drum. It is defined as the motion falling to the lowest point of the drum.

That is, when the driving motor 170 rotates the drum at approximately 35 RPM to 45 RPM, the laundry located at the lowest point of the drum 32 rises a predetermined height along the rotation direction of the drum 32 and then roughly in the rotation direction at the lowest point of the drum. It will flow to the lowest point of the drum as if rolling at a position below 90 °. When the drum rotates clockwise, the laundry continues to roll in three quadrants of the drum. The laundry is washed through the rolling motion through the friction with the wash water, friction between the laundry and the drum inner peripheral surface. And the rolling motion is generated enough to turn the laundry to be able to obtain the effect of gently scrubbing the laundry.

On the other hand, the determination of the drum RPM in the drum driving motion is determined in relation to the centrifugal force when the drum rotates. That is, the greater the RPM of the drum, the greater the centrifugal force generated in the laundry in the drum. When the centrifugal force is greater than gravity, the laundry adheres to the inner wall of the drum, and when the centrifugal force is less than gravity, the laundry falls toward the bottom of the drum. Therefore, the flow of laundry inside the drum is changed by the relative magnitude of centrifugal force and gravity. Of course, in determining the drum RPM, the rotational force of the drum and the friction between the drum and the laundry should also be taken into account.

In the rolling motion described above, the RPM of the drum is determined so that centrifugal force is generated less than gravity. In other words, in the rolling motion, the centrifugal force must be smaller than gravity because the laundry falls as the drum rolls.

4 (b) is a view showing a tumbling motion.

Referring to Figure 4 (b), the tumbling motion is driven by the drive motor 170 continues to rotate the drum 32 in one direction, the laundry on the inner peripheral surface of the drum in the rotational direction of the drum approximately 90 ° to 120 ° position It is defined as the motion falling to the lowest point of the drum. The tumbling motion is a drum driving motion that is generally used for washing and rinsing because the mechanical force is generated between the laundry and the drum simply by controlling the drum to rotate in one direction at an appropriate RPM.

That is, the laundry put into the drum 32 is located at the lowest point of the drum 32 before the driving motor 170 is driven. When the driving motor 170 provides torque to the drum 32, the drum 32 rotates, and the lift 132 provided on the inner circumferential surface of the drum moves the laundry from the lowest point in the drum to a predetermined height. If the driving motor 170 rotates the drum 32 to about 46 RPM to about 50 RPM, the laundry drops in the direction of the lowest point of the drum at about 90 ° to 110 ° in the rotational direction at the lowest point of the drum. The tumbling motion generates the centrifugal force greater than the centrifugal force generated when the drum rotates in the rolling motion, but the RPM of the drum is determined to be less than the gravity force.

When the drum rotates clockwise in tumbling motion, the laundry rises to the quadrant from the lowest point of the drum and falls to the lowest point of the drum. Therefore, the tumbling motion allows the laundry to be washed by the impact force caused by friction and dropping with the wash water, thereby performing washing and rinsing with a mechanical force greater than that of the rolling motion. In addition, since the motion falls inside the drum, there is an effect of separating the tangled laundry and dispersing the laundry.

FIG. 4C is a diagram showing step motion.

Referring to Figure 4 (c), the step motion is a drive motor 170 rotates the drum 32 in one direction, the laundry on the drum inner peripheral surface of the drum at the highest point (about 180 degrees position) in the drum rotation direction Motion controlled to fall to the lowest point.

When the driving motor 170 rotates the drum 32 at approximately 60 RPM to 70 RPM or more, the laundry can be rotated without dropping by centrifugal force until reaching the highest point. Step motion is a motion that maximizes the impact force on the laundry by braking the drum when the laundry reaches the peak.

In step motion, the driving motor 170 rotates the drum at a speed (about 60 RPM to 70 RPM or more) that does not fall until the laundry reaches the drum's maximum point by centrifugal force, and then the laundry reaches the drum's highest point (rotational direction 180). Is controlled to supply reverse torque to the drum 32. The laundry rises in the rotational direction of the drum at the lowest point of the drum 32 and then drops from the highest point of the drum 32 to the lowest point as soon as the drum stops momentarily by the reverse torque of the driving motor 170. Therefore, the step motion is a motion to wash by the impact force caused in the process of the laundry falling inside the drum to the maximum free fall. The mechanical force generated by such step motion is larger than the rolling motion or tumbling motion described above.

On the other hand, in the case of sudden braking as in the step motion, the drive motor 170 is preferably reversed braking. Reverse braking is a method of braking the motor by generating a rotational force in a direction opposite to the direction in which the motor is rotating. The phase of the current supplied to the motor can be reversed to induce a rotation force opposite to the direction in which the motor is rotating, and reverse braking enables rapid braking of the motor. Therefore, reversed braking is the most appropriate braking method for the step motion which gives a strong impact on the laundry.

In (c) of FIG. 4, the step motion is a form in which the drum moves from the lowest point of the drum to the highest point of the drum after passing from the third quadrant to the highest point of the drum when the drum rotates clockwise. do. Therefore, since the distance falling in the drum in the step motion is the largest, it is possible to more effectively provide a mechanical force when the amount of small amount.

Thereafter, the driving motor 170 again applies torque to the drum 32 to raise the laundry at the lowest point of the drum to the highest point along the same rotational direction. That is, after applying torque to rotate clockwise, when the laundry reaches the highest point, torque is momentarily stopped to rotate counterclockwise, and then torque is applied to rotate clockwise again to implement step motion. As a result, the step motion is washed by washing the laundry and the laundry flowed into the through-hole (134, see Fig. 3) formed in the drum when the drum is rotated, if the laundry is located at the highest point of the drum to wash by impact force Motion.

FIG. 4D is a diagram illustrating swing motion.

Referring to (d) of FIG. 4, the swing motion of the driving motor 170 alternately rotates the drum 32 clockwise and counterclockwise in both directions, at a point approximately 90 ° to 130 ° in the rotation direction of the drum. The motion is controlled so that the laundry falls.

That is, when the driving motor 170 rotates the drum 32 at approximately 40 RPM in the counterclockwise direction, the laundry located at the lowest point of the drum 32 is raised to a predetermined height in the counterclockwise direction. In this case, the motor stops the rotation of the drum after the laundry passes through the counterclockwise 90 ° point so that the laundry falls in the drum's lowest point direction from 90 ° to 130 ° in the counterclockwise direction of the drum.

Thereafter, the drive motor 170 rotates the drum 32 clockwise at approximately 40 RPM to raise the laundry by a predetermined height clockwise along the rotational direction of the drum. Meanwhile, the driving motor 170 stops the rotation of the drum after the laundry passes through the clockwise 90 ° point of the drum so that the laundry falls in the direction of the drum's lowest point from 90 ° to 130 ° in the clockwise direction of the drum.

In other words, the swing motion is a motion in which the drum rotates in one direction and stops and in a reverse rotation and stops. The laundry rises from the three quadrants of the drum to a portion of the second quadrant, falls smoothly and then rises from the four quadrants of the drum to a portion of the first quadrant. It can be said to repeat falling gently. Therefore, it can be said that the swing motion is a form in which the laundry flows in the form of eight characters lying sideways over the third and fourth quadrants of the drum.

At this time, the braking of the drive motor 170 is preferably using the power generation braking. Power generation braking is a braking method that uses the motor to act as a generator by rotating inertia when the current applied to the motor is turned off. When the current applied to the motor is turned off, the direction of the current flowing through the coil of the motor is opposite to the direction of the current before the power is turned off. Therefore, a force (Fleming's right hand law) acts in a direction that hinders the rotation of the motor, thereby braking the motor. The power generation braking, unlike the reverse braking, does not brake the motor smoothly but smoothly changes the rotational direction of the drum. Therefore, by adopting power generation braking in the swing motion, it is possible to minimize the load generated on the drive motor 170, minimize the mechanical wear of the drive motor 170, and at the same time control the impact applied to the laundry.

Figure 4 (e) is a view showing a scrub motion.

Referring to (e) of FIG. 4, the scrub motion of the driving motor 170 alternately rotates the drum 32 clockwise and counterclockwise in both directions, but is approximately 130 ° to the rotational direction of the drum through reverse braking. The motion is controlled so that the laundry falls at a position of 160 °.

That is, when the driving motor 170 rotates the drum 32 counterclockwise to about 60 RPM or more, the laundry located at the lowest point of the drum 32 rises a predetermined height in the counterclockwise direction. At this time, the motor stops the rotation of the drum by providing reverse torque to the drum after the laundry has passed through the counterclockwise position of about 90 °. Then, the laundry on the inner circumferential surface of the drum drops rapidly.

Thereafter, the drive motor 170 rotates the drum clockwise at about 60 RPM to raise the dropped laundry to a predetermined height in the clockwise direction. The driving motor 170 provides a reverse torque to the drum 32 when the laundry passes through a clockwise 90 ° position of the drum to pause the rotation of the drum. Therefore, the laundry on the inner circumferential surface of the drum falls to the lowest point of the drum at a position approximately 130 ° to 160 ° clockwise of the drum.

Therefore, the scrub motion washes the laundry by causing the laundry to drop sharply at a predetermined height. On the other hand, the drive motor 170 is preferably reversed braking for braking the drum.

In the scrub motion, the direction of rotation of the drum is sharply changed, and at the same time, the laundry does not deviate greatly from the inner circumferential surface of the drum, thereby achieving a very strong rubbing effect. The scrub motion is a form in which laundry that has moved to the part of the second quadrant after the three quadrants drops sharply, moves again to the part of the first quadrant after the fourth quadrant. Therefore, it can be said that the laundry which has risen repeatedly falls along the inner circumferential surface of the drum.

Hereinafter, a control method of a washing apparatus including the drum driving motion described above will be described. The washing machine generally includes a washing stroke, a rinsing stroke, and a dehydrating stroke. Hereinafter, a washing stroke and a rinsing stroke will be described.

5 is a graph showing a washing operation in the control method of the washing apparatus. In FIG. 5, the horizontal axis shows time, and the vertical axis shows the temperature of the wash water and whether the circulation pump is driven (on / off).

Referring to FIG. 5, the washing administration includes a water supply step S310, a bubbling step S330, a heating step S350, and a post-washing step S370.

The control unit is to supply the washing water into the tub 12 in the water supply step. Specifically, the control unit opens the water supply valve 720 to supply the wash water into the tub 12 through the water supply line 722 and the detergent container 710.

On the other hand, in the washing apparatus according to the second embodiment described above, the tub 12 is fixed directly to the cabinet 110, the drum 32 is provided inside the tub 12. In the washing apparatus according to the second embodiment, the tub 12 is fixed and only the drum 32 vibrates, thereby preventing contact between the drum 32 and the tub 12 when the drum 32 rotates. It is important. Therefore, the spacing between the tub 12 and the drum 32 can be configured larger than that of the conventional washing machine.

As such, when the interval between the tub 12 and the drum 32 is widened, the laundry inside the drum 32 may not be easily wetted by the washing water when water is supplied into the tub 12. Therefore, in the washing apparatus according to the second embodiment, the circulation pump 730 is operated to circulate the washing water inside the tub 12 so that laundry can be easily wetted when water is supplied. For example, the circulation pump 730 may continue to be driven while the water supply valve 720 is opened, or may be driven at a predetermined cycle.

On the other hand, in the washing apparatus according to the second embodiment described above, the drum 32 is connected to the tub bag 130. The tub back 130 is not supported by the tub 12, but is supported by the suspension unit 180 through the bearing housing 400. Thus, compared to the laundry apparatus according to the first embodiment in which the tub bag 130 is directly connected to the tub 12 to support the load of the drum 30, the degree of freedom of the drum 32 is increased, in particular, the drum 32. The degree of freedom of the front of the c) increases.

However, when water is supplied to the tub 12, the water supply line 722 and the circulation line 744 supply the washing water from the front of the tub 12, so that the fabrics located in front of the drum 32 are first. Can get wet Thereby, the load in front of the drum 32 becomes heavier than the rear, and the drum 32 front part may sag. When the front part of the drum 32 sags, noise and vibration may increase when the drum 32 rotates, and further contact the inner surface of the tub 12. Therefore, in the washing apparatus according to the second embodiment, it is necessary to allow the laundry of the front and rear parts of the drum 32 to be evenly wet when water is supplied.

Hereinafter, embodiments of the control method for allowing the laundry of the front and rear parts of the drum 32 to be uniformly wet when water is supplied by the washing apparatus according to the second embodiment will be described.

In the control method according to the first embodiment, when water is supplied in the water supply step, the circulation pump 730 is circulated to circulate the wash water and simultaneously drive the drum 32. In the case of driving the drum 32, the controller drives the drum 32 according to the scrub motion among the above-described drum driving motions.

In the washing apparatus according to the second embodiment, since the interval between the drum 32 and the tub 12 is larger than in the related art, when the water is supplied to the drum 32 as in the prior art, the tumbling motion is implemented in the drum 32. ) The rear fabric does not get wet easily. That is, since the gap between the drum 32 and the tub 12 is larger than in the related art, the washing water between the drum and the tub does not rise due to the rotation of the drum 32 by the tumbling motion, in particular, The gun will not get wet.

Therefore, in the present control method, the scrub motion is implemented instead of the tumbling motion when the water supply step is performed. As described above, since the scrub motion rotates the drum 32 at a faster RPM than the tumbling motion, the washing water between the drum 32 and the tub 12 is raised by the rotation of the drum 32. Will fall to the top of.

In particular, in the washing apparatus according to the second embodiment, since the rear portions of the drum 32 and the tub 12 have a structure inclined downward, the washing water behind the tub 12 is easily moved to the upper portion of the laundry by scrub motion. Is supplied. In addition, the scrub motion rotates the drum 32 while rapidly inverting it clockwise and counterclockwise. Therefore, vortices are generated in the wash water due to the rapid reversal movement of the drum 32, so that the laundry in front of and behind the drum can be evenly wetted.

On the other hand, when the water supply valve 720 is opened to supply water for water supply, when the drum 32 is driven and rotated, the laundry flows in the drum 32 according to the driving of the drum 32. In this case, the washing water supplied through the water supply line 722 connected to the front of the tub 12 is mostly supplied to the laundry of the front portion of the flowing drum 32 so that the front cloth is wetted faster than the rear cloth.

Therefore, in the control method according to the second embodiment, the drum 32 is not driven until a predetermined time elapses or until a predetermined water level is reached after opening the water supply valve 720 for water supply. As such, if the drum 32 is not driven for a predetermined time or until the predetermined water level is reached, the washing water supplied through the water supply line 722 is mostly accumulated at the bottom of the tub 12. Here, the predetermined water level may be determined in consideration of the interval between the tub 12 and the drum 32. In addition, the predetermined time may be determined according to the capacity of the tub 12 and the drum 32, the amount of cloth, and the like.

In particular, since the rear part of the tub 12 is installed to be inclined downward toward the lower part of the washing apparatus, a lot of washing water is collected at the rear part of the tub 12. Then, after a predetermined time has elapsed, when the drum 32 is driven and rotated, the laundry in the rear part of the drum 32 is evenly wetted by the washing water stored in the rear part of the tub 12. On the other hand, in the case of driving the drum 32 in the second embodiment, the driving motion of the drum is implemented as a tumbling motion or a scrub motion.

On the other hand, in the second embodiment, when the water supply valve 720 is opened to supply water without driving the drum 32, it is preferable to perform on / off control of the water supply valve 720.

That is, when the water supply valve 720 is opened to supply the washing water, the washing water may have a considerable water pressure by the water pressure of an external water supply source such as a faucet. In this case, the wash water supplied through the water supply line 722 may be supplied to the front of the drum 32 in the water pressure so that the fabrics in front of the front may wet first.

Therefore, when water is supplied in the second embodiment, the water supply valve 720 is not continuously opened, but on / off can be repeated. In this case, the on / off control can be performed so that the washing water supplied has a water pressure such that it is not directly supplied into the drum 32. Here, the water pressure such that it is not directly supplied into the drum, for example, the water supplied through the water supply line 722 is not sprayed directly into the drum by the water pressure, flows along the drum, tub or door, etc. Lower means a hydraulic pressure stored in the lower portion of the tub (12). Water flowing down along the drum, tub or door is accumulated at the rear of the tub 12, and the following description is similar to that of the second embodiment, so a repetitive description thereof will be omitted.

On the other hand, in the case of water supply in the water supply step, if the fabrics in the drum 32 is agglomerated, only a part of the fabric is wet. In particular, the fabrics in the center of the mass formed by the gathering of the fabrics are not wet, only the fabrics outside the mass can be wetted. As such, when only a part of the fabric is wet, washing is not performed smoothly in the washing administration, and the washing power is lowered. The control method to evenly wet the cloth in the case of agglomerates will be described below.

The control unit first supplies the washing water by opening the water supply valve 720 for water supply and simultaneously drives the circulation pump 730 to circulate the washing water. In addition, the controller rotates the drum 32 at a predetermined RPM.

Here, the predetermined RPM is determined at a speed at which the laundry can stick to the inner wall of the drum 32 without falling by gravity when the drum 32 rotates. Therefore, the predetermined RPM is set so that the centrifugal force acting when the drum rotates is greater than the gravity acceleration. In addition, the predetermined RPM is set to be lower than the transient region (approximately 200 to 35 RPM) where resonance occurs in the washing apparatus. This is because if the RPM is rotated over the transient region, noise and vibration can be significantly increased by resonance. Therefore, the predetermined RPM in the present control method may be set to about 100 to 170 RPM.

Therefore, when the control unit rotates the drum 32 at the predetermined RPM, the laundry adheres to the inner wall of the drum 32 by centrifugal force. In addition, the wash water supplied through the circulation line 744 and the water supply line 722 is dispersed as the drum 32 rotates. The dispersed washing water is supplied to the inside of the drum 32 and toward the laundry adhered along the inner wall of the drum 32. This makes the laundry evenly wet.

The control unit performs a filling step S330 after the water supply step. In the sieve step, the controller turns off the water supply valve 720 and drives the drum 32 to circulate the washing water by driving the circulation pump 730. In the above-described water supply stage, butting is performed, but in the loading stage, the water filling valve 720 is turned off, and the filling core is mainly made by driving the drum 32.

In this control method, the drum 32 is driven in the sieve stage to perform the sieve sieve. In this case, the controller may drive the drum 32 by the rolling motion described above. In the rolling motion, the laundry flows as the drum 32 rotates as the drum 32 rotates, so that the washing water and the laundry frequently come into contact with each other to smoothly carry out the packing.

In addition, the controller may include the first and second core stages by subdividing the core stages when performing the core stage. The first and second coating core stages may be classified according to the driving motion of the drum in each stage. That is, the controller may change the driving motion of the drum in the first and second core stages. Driving the circulation pump is as described above.

In more detail, the controller may drive the drum in either the rolling motion or the step motion in the first loading step. The choice of drum drive motion can be determined by the quantity of the drum. That is, when the amount of the internal drum is equal to or less than a predetermined reference value, for example, when the amount is small, the controller may drive the drum according to the step motion, and when the amount is larger than the reference value, the drum may be driven in the rolling motion.

As described above, when the quantity is small, the effect of dropping the laundry in the step motion is increased. Therefore, when the quantity is small in the first packing step, the step motion is implemented to drop the laundry to the maximum drop so that the water is well absorbed by the laundry. On the other hand, when there is a large amount of quantity in the first loading step, the rolling motion is implemented. This is because if the amount of gun is large, even if the step motion is implemented, the drop distance of the gun is relatively large.

Subsequently, when the drum 32 rotates in the second core step, the control unit rotates at a predetermined RPM that the laundry may be attached to the inner wall of the drum 32 without falling by gravity (hereinafter referred to as alpha motion). Done. The predetermined RPM is determined at a speed at which the laundry can stick to the inner wall of the drum 32 without falling by gravity when the drum 32 rotates. Therefore, the predetermined RPM is set so that the centrifugal force acting when the drum 32 rotates is greater than the gravity acceleration. In addition, the predetermined RPM is set to be lower than the transition region of the washing machine. This is because the noise and vibration can be significantly increased by the resonance when rotated beyond the transient region. Therefore, the predetermined RPM may be set to about 100 to 170 RPM.

As a result, since the drum 32 is rotated at the predetermined RPM in the second bubbling step, the laundry adheres to the inner wall of the drum 32 by centrifugal force, and the washing water supplied by the circulation pump is attached to the inner wall of the drum. It is fed evenly toward the gun. This makes it possible to wet the gun evenly.

On the other hand, in the second sieve step, the controller may implement another driving motion following the alpha motion as described above. For example, the controller may implement a rolling motion following the alpha motion. In this case, it is possible to supply the washing water by dispersing the cloth by alpha motion, and to uniformly wet the washing water by rolling motion of the cloth by rolling motion.

Subsequently, the controller performs a heating step S350.

In detail, the controller drives the drum 32 by driving any one of the tumbling motion, the rolling motion, and the swing motion in the heating step, and drives a heater (not shown) provided inside the tub 12 to generate a tub 12. The wash water inside is heated.

However, in the washing apparatus according to the second embodiment, the interval between the drum 32 and the tub 12 is larger than in the related art. Therefore, even when the drum 32 is rotated when the washing water is heated by driving the heater, only the washing water stored in the tub 12 is heated, and the laundry inside the drum 32 may not be heated. Therefore, due to the temperature of the laundry, which is relatively low temperature compared to the heated wash water, when washing the laundry in the after-washing step (S370) to be described later it may not fall smoothly.

Therefore, in the control method applied to the washing apparatus according to the second embodiment, it is preferable to drive the circulation pump 730 to circulate the washing water when the heating step is performed. The laundry can be warmed by supplying the heated wash water stored in the tub 12 by the circulation pump 730 through the upper portion of the tub 12 again.

However, in the heating step, the circulation pump 730 is preferably driven intermittently at a predetermined cycle rather than continuously driving. In particular, in the heating step, the circulation pump 730 is preferably controlled so that the off time is longer than the on time. This is because if the circulating pump is continuously driven in the heating step, or if the on time of the circulating pump is longer than the off time, the washing water circulates without being heated to a predetermined temperature and the washing water is not heated to a desired temperature.

On the other hand, when a heater is provided in the tub 12, it is important to allow the heater to be driven without being exposed to the surface of the water. This is because if the heater is driven while the heater is exposed above the water surface, the heater is overloaded, which may cause a failure of the heater. Therefore, when the heater is driven in the heating step, it is important to maintain the water level (hereinafter referred to as the reference level) with the heater more than a predetermined distance. That is, the controller turns off the heater when the water level falls below the reference level in the heating step. Further, when the water level rises again above the predetermined level due to the resupply or the like, the control unit may control by turning on the heater again (hereinafter, referred to as a “cut off method”).

However, when the cut-off method is applied to the heating step of the washing apparatus according to the second embodiment, the heater and various circuits may be overloaded, and further, the life may be shortened.

That is, in the heating step of the washing apparatus according to the second embodiment, the heater is driven to heat and the circulation pump 730 is driven at the same time. Therefore, the water level in the tub 12 is not kept constant by the drive of the circulation pump 730, but continuously fluctuates by a predetermined amount. In this case, as the water level in the tub 12 is oscillated, the water level can be lowered below the reference water level. In particular, when the water level in the tub 12 is oscillated at the reference level, the heater is turned on above the reference level and turned off below the reference level, thereby repeatedly turning on / off. Repetitive on / off of the heater may overload various circuits including the heater and shorten the life.

Therefore, in the heating step of the washing apparatus according to the second embodiment, if the water level in the tub 12 is lowered to reach the reference level while the heater is being driven, re-watering is performed to prevent repeated on / off of the heater.

Specifically, when the water level in the tub 12 falls below the reference level in the heating step, the control unit stops the driving of the drum 32, turns off the circulation pump 730, and opens the water supply valve 720 to restart the water level. Perform watering; The reason for turning off the drum and the circulation pump is that when the drum and the circulation pump are driven, the water level inside the tub fluctuates, making it difficult to detect the correct water level. Furthermore, it is also possible to turn off a heater. Meanwhile, the rewatering may be performed for a predetermined time, or may be performed so that water is supplied up to a reference level by a level detection or to a predetermined level beyond the reference level. The specific level of the resupply stage may vary depending on the type of course selected initially.

Subsequently, the controller drives the circulation pump 730 while driving the drum 32 to perform a post-laundry step. The driving motion of the drum 32 in the post-washing step may be appropriately selected from the above-described driving motions according to the course selected by the user. The circulation pump 730 is driven at a predetermined cycle to circulate the wash water inside the tub 12.

When the washing operation is finished through the above steps, the control unit performs a rinsing stroke. 6 shows a rinsing stroke according to the first embodiment.

Referring to FIG. 6, the rinsing stroke includes a rinsing dehydration step S410, a water supply step S430, a drum driving step S450, and a draining step S470.

First, the controller performs a rinsing dehydration while rotating the drum 32 at a second rotational speed RPM 2 (S410). In the rinsing and dehydration step, the control unit rotates the drum 32 at approximately 500 to 700 rpm to remove moisture and detergent remaining in the fabric in the washing stroke.

Subsequently, the controller stops the drum 32, opens the water supply valve 720, and supplies rinsing water into the tub 12 (S430). Here, the rinsing water level may be set in advance according to the course selected by the user, or may be set manually by the user.

When the water supply is finished, the control unit drives the drum 32 at a predetermined cycle at a first rotational speed RPM 1 (S450). In the drum driving step, the controller controls the motion of the drum 32 to remove the detergent from the laundry. In this step, the controller may control the drum by any one of the above tumbling motion, step motion, scrub motion, rolling motion and swing motion.

Subsequently, the controller stops driving the drum 32 and drives a drain pump (not shown) to drain the rinse water in the tub 12 (S470).

The steps as described above, that is, the rinsing dehydration step, the water supply step, the drum driving step, and the draining step form one cycle of the rinsing stroke. The controller may perform the cycle only once or a plurality of times by the selected course or by the user's selection.

However, the rinsing stroke according to the above-described embodiment includes a rinsing dehydration step in one cycle. As described above, the second rotational speed of the rinsing dehydration step corresponds to approximately 500 to 700 RPM, and the rotational speed of the rinsing dehydration corresponds to a transient region (about 200 to 350 RPM) or more at which resonance of the washing apparatus occurs. .

Therefore, when the foam in the drum 32 is not evenly distributed, a foaming dispersing step of dispersing the foam can be performed, and then accelerated for rinsing dehydration. The dispersing step is performed by repeatedly rotating the drum 32 forward and / or reverse rotation at a predetermined RPM. When the eccentricity of the drum 32 is confirmed after completion of the dispersing step, rinsing and dehydration is performed when the eccentricity of the drum 32 is less than or equal to a predetermined value, but when the eccentricity is greater than or equal to the predetermined value, the dispersing step is repeated. As a result, since the dispersing step is performed before the rinsing dehydration step, it takes a lot of time for the rinsing stroke, and in particular, as the repetition of the dispersing step takes place, the time for the rinsing stroke is remarkably long, and the time required for the rinsing stroke is accurately estimated. There is a problem that can not be.

Hereinafter, a description will be given of a control method of the rinsing stroke which can reduce the time required for the above problem, that is, the rinsing stroke.

7 shows a rinsing stroke according to a second embodiment of the present invention.

Referring to FIG. 7, the rinsing stroke according to the second embodiment includes a water supply step S510, a drum driving step S530, and a drainage step S550. The rinsing stroke according to the second embodiment is different in that the rinsing dehydration step is omitted in comparison with the first embodiment described above. By omitting the rinsing dehydration step, the time of the rinsing dehydration step can be reduced, and furthermore, since the podispersion step is not required, the problem of the rinsing administration time being remarkably increased can be prevented. By the way, the time required for the rinsing administration can be shortened by omitting the rinsing dehydration step, but by eliminating the rinsing dehydration step of removing the detergent remaining on the cloth by rotating the cloth at a relatively high speed, the detergent remaining in the cloth is sufficiently removed. It can be difficult to remove.

Therefore, in the method of controlling the rinsing stroke according to the second embodiment, the drum 32 is not stopped in the draining step but rotates for about 1 to 3 minutes at the second rotational speed RPM 2. Here, the second rotational speed is determined as the speed at which the laundry can be attached to the inner wall of the drum 32 without falling by gravity when the drum 32 rotates. Therefore, the second rotational speed is set so that the centrifugal force acting when the drum 32 rotates is greater than the gravity acceleration. In addition, the second rotational speed is set to be lower than the transient area of the washing apparatus. This is because the noise and vibration can be significantly increased by the resonance when rotated beyond the transient region. Therefore, the second rotation speed may be set to about 100 to 170 RPM.

As a result, since the drum 32 is rotated at the predetermined RPM in the draining step, the laundry adheres to the inner wall of the drum 32 by centrifugal force, and the detergent remaining in the cloth can be removed. Therefore, instead of omitting the rinsing dehydration step, it is possible to prevent the deterioration of the rinsing performance by rotating the drum at the second rotational speed in the draining step.

On the other hand, as described above, when the water inside the tub 12 is drained, the drum 32 is rotated at a second rotational speed (when the drum 32 is rotated, the laundry does not fall by gravity, but Rotating at a rate that may be attached to the inner wall may be applied to all drainage steps performed prior to the rinsing stroke. That is, even in the case of draining water in the washing stroke, the step of rotating the drum 32 to the predetermined RPM can be performed.

1 is a schematic view according to a first embodiment of a washing apparatus to which a control method according to the present invention is applied;

2 is an exploded perspective view according to a second embodiment of a washing apparatus to which a control method according to the present invention is applied;

3 is a cross-sectional view of FIG.

4 is a schematic diagram showing a driving motion of a drum applied to a control method according to the present invention;

5 is a graph showing each step of the washing administration,

6 is a graph showing a rinsing stroke according to the first embodiment, and

7 is a graph illustrating a rinsing stroke according to a second embodiment.

Claims (10)

And a washing stroke comprising at least one water supply step of driving the drum by scrub motion when water is supplied into the tub. The method of claim 1, The control method of the washing apparatus, characterized in that for performing the circulation step of supplying the tub again by circulating the wash water in the tub. And a washing stroke including at least one water supply step of driving the drum after a predetermined time has passed since the water supply was started into the tub or after reaching a predetermined water level. The method of claim 3, Tub and drum of the washing apparatus is a control method of the washing apparatus, characterized in that the rear portion is provided to be inclined downward. The method of claim 3, The control method of the washing apparatus, characterized in that for performing a circulating step of circulating the washing water of the tub to supply to the tub again in the water supply step. The method of claim 5, The circulation line for circulating the washing water is controlled in the washing apparatus, characterized in that connected to the front of the tub. The method of claim 3, The washing device is connected to the water supply line in front of the tub, The control method of the laundry machine, characterized in that the on time supplied when the water supply valve is turned on for the water supply is set to be shorter than the off time. The method of claim 7, wherein Control time of the laundry machine, characterized in that the on-time is determined so that the wash water supplied through the water supply line has a predetermined or less water pressure. The method of claim 8, The control method of the laundry machine, characterized in that the on time of the water supply valve is determined so that the washing water supplied through the water supply line has a water pressure such that the water is not directly supplied into the drum. The method according to any one of claims 1 to 9, The washing device, cabinet; A tub fixed to the cabinet; A drive unit including a rotating shaft connected to the drum, a bearing housing rotatably supporting the rotating shaft, and a motor connected to the rotating shaft; A connection member for flexibly connecting the driving unit and the rear opening of the rear of the tub; And And a suspension unit connected to the driving unit to support the buffer.

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