KR20190080679A - Method for controlling washing machine - Google Patents

Abstract

The present invention relates to a method of controlling a washing machine. The washing machine comprises: a tub to which water is filled; a drum rotatably provided in the tub; at least one nozzle for spraying water into the drum; a washing motor for rotating the drum; and a pump for pumping the water discharged from the tub into at least one circulation nozzle. The method of controlling the washing machine comprises the steps of: (a) accelerating the washing motor so that laundry in the drum rotates in contact with an inner circumferential surface of the drum and accelerating a pump motor constituting the pump in response to acceleration of the washing motor such that water is injected through the at least one nozzle; and (b) controlling the washing motor to rotate at a first rotational speed and controlling the pump motor to repeat deceleration and acceleration one or more times within a set rotation range.

Description

[0001] METHOD FOR CONTROLLING WASHING MACHINE [0002]

The present invention relates to a control method of a washing machine having a circulation pump circulating wash water.

Generally, a washing machine is a device that separates contaminants from clothes, bedding, etc. (hereinafter, referred to as "laundry") by using physical action such as chemical decomposition of water and detergent and friction between water and laundry It is collective.

Such a washing machine includes a tub containing water and a drum rotatably installed in the tub to receive the laundry. Recent washing machines are configured to circulate water discharged from the turbine using a circulation pump, and to spray the circulated water into the drum through a nozzle.

In recent years, new technologies have been developed to control the rotation of the drum to impart variety to the flow of laundry introduced into the drum. On the other hand, techniques for improving the washing effect by varying the water pressure injected through the nozzle according to the rotation of the drum have also been developed.

However, in order to further improve the washing effect, there is a need for an improved control method of controlling the rotation of the drum and controlling the water pressure injected through the nozzle in association with the rotation of the drum.

A problem to be solved by the present invention is to solve the problem that a droplet is concentrated on a part of laundry in a filtration motion.

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

According to an aspect of the present invention, there is provided a method of controlling a washing machine, the method comprising: a tub containing water; a drum rotatably installed in the tub; at least one nozzle for spraying water into the drum; A washing motor for rotating the drum, and a pump for feeding water discharged from the tub to the at least one circulating nozzle, the method comprising the steps of: (a) Accelerates the washing motor so as to rotate in contact with the inner circumferential surface of the drum and accelerates the pump motor constituting the pump in response to the acceleration of the washing motor so that water is sprayed through the at least one nozzle step; And (b) controlling the washing motor to rotate at a first rotational speed, and controlling the pump motor to repeat the deceleration and acceleration at least once within the set rotational range.

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

The control method of the washing machine of the present invention can improve the washing effect at the time of the filtration motion by controlling the rotation speed of the circulation pump motor to be variable within a constant speed range when the rotation speed of the drum is maintained at high speed during the filtration motion There is an effect. That is, by spraying water evenly on the laundry, the rinsing effect can be improved when the filtration motion is performed in the rinsing step.

In addition, by spraying water evenly on the laundry during the filtration motion, the laundry can be fixed in a wide open state without being shifted into the drum, thereby improving the dehydrating effect.

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

1 is a perspective view illustrating a washing machine according to an embodiment of the present invention.
2 is a sectional view of the washing machine shown in Fig.
3 is a block diagram showing a control relationship between main parts of a washing machine according to an embodiment of the present invention.
FIG. 4 schematically shows the main components of a washing machine according to an embodiment of the present invention.
Fig. 5 schematically shows the drum viewed from the front, and the jet range of each nozzle is shown.
Fig. 6 schematically shows a side view of the drum, in which the jetting range of each nozzle is shown.
7 is a view showing drum driving motions in which a washing machine according to an embodiment of the present invention can be implemented.
8 is a graph comparing cleaning power and vibration level of drum driving motions.
Fig. 9 is a diagram referred to explain the jetting motion in each drum driving motion of the present invention in comparison with the conventional one.
10 is a flowchart showing a control method of the washing motor and the pump motor in the drum driving motion.
FIG. 11 shows the entire washing sequence applied to the washing machine of the present invention.
12 is a graph showing the speed (a) of the washing motor and the speed (b) of the pump motor in the rolling motion and the tumbling motion.
13 is a graph for explaining operations of the washing motor and the pump motor in the swing motion, the scrub motion, and the step motion according to the embodiment of the present invention.
14A shows the change in the number of revolutions (a) of the drum and the change in the number of revolutions (b) of the pump during the filtration motion according to the embodiment of the present invention.
FIG. 14B shows the change in the number of revolutions (a) of the drum and the change in the number of revolutions (b) of the pump according to another embodiment of the present invention.
Fig. 15 shows an arrangement of laundries in the drum during filtration motion. Fig.
16 is a graph in which the speed of the pump motor in each drum driving motion is compared with a time when the amount of the sweep falls within the first sweep range I and a time when the sweep falls within the second sweep range II.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to 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.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings for explaining a washing machine configuration and a control method according to embodiments of the present invention.

<Configuration>

1 is a perspective view illustrating a washing machine according to an embodiment of the present invention. 2 is a sectional view of the washing machine shown in Fig. 3 is a block diagram showing a control relationship between main parts of a washing machine according to an embodiment of the present invention. FIG. 4 schematically shows the main components of a washing machine according to an embodiment of the present invention.

Referring to FIGS. 1 to 4, the casing 10 forms an outer surface of the washing machine, and a charging port 12h through which laundry is charged is formed on the front surface. The casing 10 includes a cabinet 11 having a front surface and a left surface, a right surface and a rear surface and a front panel 12 coupled to an opened front surface of the cabinet 11 and having a charging port 12h formed therein . A bottom surface and an upper surface of the cabinet 11 are opened, and a horizontal base 15 supporting the washing machine can be coupled to the bottom surface. The casing 10 may further include a top plate 13 covering an open upper surface of the cabinet 11 and a control panel 14 disposed on the top of the front panel 12. [

The control panel 14 includes an input unit (for example, a button, a dial, a touch pad, and the like) for receiving various settings for the operation of the washing machine from the user, a display unit LED display, etc.).

The door 20 for opening and closing the inlet 12h may be rotatably coupled with the casing 10. [ The door 20 may include a door frame 21 which is opened at a substantially central portion and is rotatably coupled to the front panel 12 and a window 22 provided at an opened central portion of the door frame 21 .

In the casing (10), a tub (31) containing water can be disposed. The tub 31 has an inlet formed at the front thereof so as to allow laundry to be introduced therein, and the inlet communicates with an inlet formed in the casing 10 by the gasket 60.

The gasket 60 is for preventing water contained in the tub 31 from leaking. The front end portion is superimposed on the front surface (or the front panel 12) of the casing 10 and the rear end portion is engaged with the inlet of the tub 31, and the front end portion and the rear end portion extend in a tubular form. The gasket 60 may be made of a flexible or resilient material. The gasket 60 may be made of natural rubber or synthetic resin.

The gasket 60 includes a casing coupling portion 61 coupled to the inlet of the casing 10, a tub coupling portion 62 coupled to the periphery of the inlet of the tub 31, And an extension 63 extending to the portion 62.

The extended portion 63 is formed with a flat portion 64 that extends evenly from the casing engaging portion 61 toward the tub engaging portion 62 and is provided between the flat portion 64 and the tub engaging portion 62 The folded portion 65 may be formed.

The folded-back portion 65 is folded or unfolded when the tub 31 moves in the eccentric direction. The folded portion 65 may be formed over the entire circumference of the gasket 60.

The nozzles 83a and 83b may be provided on the flat portion 64. [ According to the embodiment, the nozzles 83a and 83b may be integrally formed with the flat portion 64, but the present invention is not limited thereto. A nozzle fastener (not shown) may be formed on the flat portion 64, (Not shown in the drawings, a tube into which water pumped by the pump flows) can be inserted / fixed into the nozzle fastener. In any case, preferably, the outlet of the nozzle for spraying the water toward the drum 40 is located on the inner side surrounded by the gasket 60, and the circulating water guide pipe 18 is located on the outer side of the gasket 60 And connected to the inlet pipe.

The front panel 12 is curled outward around the loading port, and the casing engaging portion 61 is fitted in the concave portion formed by the outer peripheral surface of the curled portion. After the wire is wound along the groove, the both ends of the wire are coupled together so that the casing coupling portion 61 allows the front panel 12 to move around the inlet port As shown in FIG.

In the tub 31, a drum 40 in which laundry is accommodated is rotatably provided. In the drum 40, a plurality of through holes 47 communicating with the tub 31 may be formed. Further, on the inner circumferential surface of the drum 40, a lifter 45 for lifting the laundry when the drum 40 rotates can be provided.

The drum 40 receives the laundry, and is disposed such that the inlet for inputting the laundry is positioned at the front, and is rotated around a substantially horizontal center line of rotation C. However, "horizontal" here is not a term used mathematically as a strict sense. That is, when the rotational center line C is tilted at a predetermined angle (for example, 5 degrees or less) with respect to the horizontal as in the embodiment, it is also approximate horizontal.

The tub 31 can be supported by a damper 16 provided at the bottom of the casing 10. [ The vibration of the tub 31 caused by the rotation of the drum 40 is attenuated by the damper 16.

A water supply hose (not shown) for guiding water supplied from an external water source such as a faucet to the tub 31, and a water supply valve 94 for interrupting the water supply hose.

A dispenser 35 for supplying an additive such as a detergent, a fabric softener or the like into the tub 31 or the drum 40 may be provided. In the dispenser 35, the additives can be accommodated according to their types. The dispenser 35 may include a detergent receiving portion (not shown) for receiving the detergent and a softening agent receiving portion (not shown) for receiving the fabric softening agent.

At least one water supply pipe 34 for selectively guiding the water supplied through the water supply valve 94 to the respective receiving portions of the dispenser 35 may be provided. At least one water supply pipe 34 may include a first water supply pipe for supplying water to the detergent receiving part and a second water supply pipe for supplying water to the fabric softener receiving part, A first water supply valve for interrupting the first water supply pipe, and a second water supply valve for interrupting the second water supply pipe.

The gasket 60 is provided with a direct water nozzle 57 for injecting water into the drum 32 and a direct water supply pipe 39 for guiding the water supplied through the water supply valve 94 to the direct water nozzle 57 May be provided. The water supply valve 94 may include a third water supply valve for interrupting the direct water supply pipe 39.

The water discharged from the dispenser (35) is supplied to the tub (31) through the water supply bellows (37). The tub 31 may be provided with a water supply port (not shown) connected to the water supply bellows 37. A drain port for discharging water is formed in the tub 31, and a drainage bellows 17 is connected to the drain port . And a circulation pump 36 for pumping the water discharged into the drainage bellows 17 to the circulation water guide pipe 18.

The circulation pump 36 may include an impeller (not shown) for feeding water, a pump housing (not shown) for receiving the impeller, and a circulation pump motor 92 for rotating the impeller. The pump housing is provided with an inlet port (not shown) through which the water flows through the drainage bellows 17 and a circulating water discharge port (not shown) through which the water fed by the impeller is discharged through the circulating water guide pipe 18 . The inlet of the circulating water guide pipe 18 is connected to the circulating water discharge port, and the outlet is connected to the nozzles 83a and 83b to be described later.

When the user inputs settings (for example, washing course, washing, rinsing, dehydrating time, dehydrating speed, etc.) through the input unit provided on the control panel 14, the controller 91 controls the washing machine To be operated. Control algorithms such as a water supply valve 94, a washing motor 93, a circulation pump motor 92 and a drain valve 96 are stored in a memory (not shown) for each course that can be selected through the input unit And the control unit 91 can control the washing machine to operate according to an algorithm corresponding to the setting inputted through the input unit.

A drain pump 33 for feeding water discharged from the tub 31 to the drain pipe 19 may be provided. The drain pump 33 pumps the water introduced through the drainage bellows 17 to the drain pipe 19. The drain pump 33 may include an impeller (not shown) for feeding water, a pump housing (not shown) for receiving the impeller, and a drain pump motor 98 for rotating the impeller. The drain pump motor 98 may be substantially the same as the circulating pump motor 92. The pump housing may be provided with an inlet port (not shown) through which water is introduced through the drainage bellows 17 and a drainage outlet port (not shown) through which the water fed by the impeller is discharged through the drainage pipe 19 .

Under the control of the control unit 91, the circulation pump 38 may be activated (e.g., at the time of washing) according to a predetermined algorithm, and the drain pump 33 may be activated (e.g., drained).

On the other hand, the circulating pump motor 92 is a variable speed motor whose rotational speed is controlled. According to the embodiment, when the circulation pump is provided separately from the drain pump, the pump motor constituting the circulation pump may be a variable speed motor. The circulating pump motor 92 may be a BLCD motor (Brushless Direct Current Motor), but is not necessarily limited thereto. A driver for controlling the speed of the circulation pump motor 92 may be further provided, and the driver may be an inverter driver. The inverter driver converts AC power to DC power and inputs it to the motor at the target frequency.

A control unit 91 for controlling the circulation pump motor 92 may be further provided. The control unit 91 may include a proportional-integral controller (PI controller), a proportional-integral-differential controller (PID controller), and the like. The controller receives the output value (for example, output current) of the circulating pump motor 92 and determines the rotational speed (or the rotational speed) of the circulating pump motor 92 based on the output value , The target rotation speed) of the driver can be controlled.

On the other hand, the control unit 91 can control not only the circulation pump motor 92 but also the drain pump motor 98, and furthermore can control the overall operation of the washing machine. Even if it is not mentioned, it is assumed that it is controlled by the control unit 91.

At least one nozzle 83a, 83b for spraying the circulating water pumped by the circulation pump 36 into the drum 40 may be provided. In the embodiment, the nozzles 83a and 83b provided on the left and right sides of the gasket 60 are configured to inject water upward from below the center of the drum 40, but the present invention is not limited thereto. That is, the number and position of the nozzles can be variously modified. However, in any case, the washing machine according to the embodiment of the present invention is capable of controlling the number and position of the nozzles, As the flow rate, rotational speed or number of rotations increases), it is preferable to include at least one nozzle configured to inject water upward.

The outlets of the nozzles 83a and 83b can be opened upward toward the inside of the drum 40. [ Therefore, when water is supplied at a predetermined water pressure or higher, the spraying through the nozzles 83a and 83b is performed in an upward sloping direction toward the inside of the drum 40, and the sprayed water reaches the deep portion of the drum 40 This can be done.

On the other hand, when the water pressure of the water supplied to the nozzles 83a and 83b is insufficient, the water sprayed through the outlet of the nozzles 83a and 83b does not sufficiently advance upward and is easily lowered by the gravity, ) To the deep inside.

Fig. 4 shows the spray form when water is supplied by the pump 36 at a sufficient water pressure, and "b" when the water pressure is lower than that. That is, as the rotation speed of the pump 36 is varied, the shape of the water flow injected through the nozzles 83a and 83b can be varied between a and b.

Fig. 5 schematically shows the drum viewed from the front, and the jet range of each nozzle is shown. Fig. 6 schematically shows a side view of the drum, in which the jetting range of each nozzle is shown.

5, quadrants Q1, Q2, Q3 and Q4 are defined by quadrupling the drum 40 viewed from the front, the first nozzle 83a is arranged in the third quadrant Q3, And the nozzle 83b is disposed in the fourth quadrant Q4. The lower limit b of the water flow injected through each of the nozzles 83a and 83b in Fig. 5 indicates that the circulation pump motor 92 is rotated at 2600 rpm, and the upper limit a indicates that the circulation pump motor 92 rotates at 3000 rpm As shown in Fig.

The first nozzle 83a is configured to inject water into the area reaching the third quadrant Q3 and the second quadrant Q2 in accordance with the rotation speed of the circulation pump motor 92. [ That is, as the speed of the circulation pump motor 92 increases, water is injected upwardly through the first nozzle 83a, and when the circulation pump motor 92 rotates at the maximum speed, the first nozzle 83a, Flows on the rear surface 41 of the drum 40 to the second quadrant Q2.

In accordance with the rotational speed of the circulating pump motor 92, the second nozzle 83b is configured to inject water into the area reaching the fourth quadrant Q4 and the second quadrant Q1. That is, as the speed of the circulating pump motor 92 is increased, water is injected upwardly through the second nozzle 83b, and when the circulating pump motor 92 is rotated at the maximum speed, the second nozzle 83b, The water flows from the rear surface 41 of the drum 40 to the first quadrant Q1.

6, when the first region, the second region and the third region are defined in order from the front by dividing the drum 40 viewed from the side into three equal parts, the rotational speed of the circulating pump motor 92 gradually increases, It can be seen that the water jetted from the nozzles 83a and 83b is further moved to the deep position of the drum 40. [ The water flow jetted from the nozzles 83a and 83b reaches the first region of the inner peripheral surface 42 of the drum 40 when the rotation speed of the circulating pump motor 92 is 2200 rpm as exemplified in the figure, In the case of 2500 rpm, it reaches the second region, and in the case of 2800 rpm, it reaches the third region. When the rotation speed of the circulation pump motor 92 is further increased, the water flow is caused to flow to the rear surface 41 of the drum 40. At 3000 rpm, the water flow reaches 1/3 of the height H of the drum 40, The water flow reaches 2/3 of the height H of the drum 40. When the rotation speed of the circulation pump motor 92 reaches 3400 rpm, the height of the water flow reaches a maximum, and the structure of the nozzles 83a and 83b does not increase the jetting height any more, .

<Control method>

7 is a view showing drum driving motions in which a washing machine according to an embodiment of the present invention can be implemented. Hereinafter, with reference to FIG. 7, drum driving motions will be described in detail.

The drum driving motion means a combination of the rotating direction and the rotating speed of the drum 40. The laundry placed in the drum 40 due to the drum driving motion is different in the falling direction and the falling time point, The flow of the laundry inside the washing machine becomes different. The drum driving motion is realized by controlling the washing motor 93 by the control unit 91. [

The laundry is raised by the lifter 45 provided on the inner circumferential surface of the drum 40 when the drum 40 rotates so that the impact applied to the laundry can be differentiated by controlling the rotational speed and the rotational direction of the drum 40 do. That is, friction between laundry, friction between laundry and washing water, and dropping impact of laundry can be different. In other words, the laundry can be knocked or rubbed for washing, and the laundry can be dispersed or turned upside down at different degrees.

In order to realize the various drum driving motions, the washing motor 93 is preferably a direct-coupled motor. That is, it is preferable that the stator of the motor is fixed to the rear of the tub 31, and the driving shaft 38 rotated together with the rotor of the motor drives the drum 40 directly. This is because, by controlling the rotation direction, the torque, and the like of the motor, it is possible to instantaneously control the drum driving motion by preventing time delay or backlash as much as possible.

On the other hand, in the case of transmitting the rotational force of the motor to the rotating shaft through a pulley or the like, drum driving motions in which time delay or backlash is allowed, for example, tumbling driving or spinning driving are possible, but various other drum driving motions Lt; / RTI &gt; The manner of driving the washing motor 93 and the drum 40 will be obvious to those skilled in the art and will not be described in detail.

Figure 7 (a) is a view showing a rolling motion. The rolling motion is performed in such a manner that the washing motor 93 rotates the drum 40 in one direction (preferably one or more rotations), while the laundry on the inner circumferential surface of the drum 40 rotates about 90 degrees in the rotational direction of the drum 40 Position to the lowest point of the drum 40. In this case,

For example, when the washing motor 93 rotates the drum 40 at about 40 RPM, the laundry located at the lowest point of the drum 40 rises to a predetermined height along the rotating direction of the drum 40, And flows toward the lowest point of the drum 40 as it rolls at a position less than about 90 degrees in the rotational direction from the lowest point. Visually, when the drum 40 rotates clockwise, the laundry continuously rolls in the third quadrant of the drum 40.

In the rolling motion, the laundry is washed through friction with the washing water, friction between laundry, and friction with the inner circumferential surface of the drum 40. At this time, sufficient flipping of the laundry is generated, and the effect of gently rubbing the laundry can be obtained.

Here, the rotational speed (rpm) of the drum 40 is determined in relation to the radius of the drum 40. As the rotational speed of the drum 40 increases, the centrifugal force acting on the laundry in the drum 40 also increases. The flow of the laundry in the drum 40 is changed due to the difference in magnitude between the centrifugal force and the gravity. Of course, the rotational force of the drum 40 and the friction between the drum 40 and the laundry must also be considered. Thus, in consideration of various forces acting on the laundry, the rotation speed of the drum 40 in the rolling motion is determined in a range in which the sum of the centrifugal force and the frictional force is smaller than the gravitational force 1G.

7 (b) is a view showing a tumbling motion. The tumbling motion is performed when the washing motor 93 rotates the drum 40 in one direction (preferably by one or more turns) so that laundry on the inner circumferential surface of the drum 40 rotates about 90 to 110 degrees Position to the lowest point of the drum 40. [0050] The tumbling motion is a drum driving motion that is generally used in washing and rinsing since mechanical force is generated only by controlling the drum 40 to rotate in one direction at a proper rotating speed.

That is, the laundry loaded into the drum 40 is positioned at the lowest point of the drum 40 before the washing motor 93 is driven. When the laundry motor 93 provides torque to the drum 40, the drum 40 rotates and the friction between the drum 40 and the lifter 45 or the inner circumferential surface of the drum 40, And is raised from the lowest point in the drum 40 to a predetermined height. For example, when the washing motor 93 rotates the drum 40 by about 46 rpm, the laundry falls from the lowest point of the drum 40 toward the lowest point of the drum 40 at about 90 to 110 degrees in the rotating direction do.

The rotational speed of the drum 40 in the tumbling motion can be set in a range where the centrifugal force is generated larger than in the case of the rolling motion but less than in gravity.

Visually, the tumbling motion causes the laundry to rise from the lowest point of the drum 40 to the position of 90 degrees or quadrant, and then separates into the inner peripheral surface of the drum 40 when the drum 40 rotates clockwise, As shown in Fig.

Therefore, the laundry in the tumbling motion is washed by the impact force caused by the friction with the wash water and the drop, and in particular, by the greater mechanical force than in the case of the rolling motion. Particularly, there is an effect that the laundry tangled in the tumbling motion is separated and the laundry is dispersed.

Fig. 7C is a diagram showing a step motion. The step motion is carried out in such a manner that the washing motor 93 rotates the drum 40 in one direction (preferably less than one rotation), so that the laundry on the inner circumferential surface of the drum 40 is positioned near the highest point of the drum 40 The position of the drum 40 is not limited to the position of about 146 to 161 degrees in the rotational direction of the drum 40 but may be an angle position larger than 161 degrees within the range of not exceeding 180 degrees) And is controlled to fall toward the lowest point.

That is, the step motion is performed at a speed at which the laundry does not fall from the inner circumferential surface of the drum 40 due to the centrifugal force (that is, the speed at which the laundry is rotated together with the drum 40 in a state in which the laundry is stuck to the inner circumferential surface of the drum 40 by centrifugal force) The drum 40 is rotated, and then the drum 40 is suddenly braked, thereby maximizing the impact force on the laundry.

For example, when the washing motor 93 rotates the drum 40 at a speed of about 60 rpm or more, the laundry is rotated by the centrifugal force without dropping (that is, the drum 40 is adhered to the inner peripheral surface of the drum 40) When the laundry is positioned near the highest point of the drum 40 (180 degrees in the rotating direction), the torque in the direction opposite to the rotating direction of the drum 40 is transmitted to the washing motor Lt; RTI ID = 0.0 &gt; 93 &lt; / RTI &gt;

The laundry is raised at the lowest point of the drum 40 along the direction of rotation of the drum and then dropped to the lowest point of the drum 40 while the drum 40 is stopped so that the fall of the laundry is maximized, It is also maximized. The mechanical force (e.g., impact force) generated by such step motion is larger than the above-described rolling motion or tumbling motion.

Visually, the step motion is such that, when the drum 40 rotates clockwise, the laundry located at the lowest point of the drum 40 moves to the highest point (180 degrees) of the drum 40 through the third quadrant and the quadrant, Is separated from the inner circumferential surface of the drum 40 and drops toward the lowest point of the drum 40. Therefore, the step motion provides the mechanical force more effectively as the drop of laundry is the largest and the amount of laundry is smaller.

On the other hand, as a control method of the washing motor 93 for braking the drum 40, reverse phase braking is preferable. The reverse-phase braking is a method in which a rotational force is generated in a direction opposite to the direction in which the washing motor 93 is rotating, thereby braking. The phase of the power supplied to the washing motor 93 can be reversed in order to generate a rotational force in a direction opposite to the direction in which the washing motor 93 is rotating. Therefore, reverse phase braking is suitable for step motion.

After the washing motor 93 is braked, the washing motor 93 again applies a torque to the drum 40 to raise the laundry at the lowest point of the drum 40 to the highest point. That is, step motion is implemented by applying a torque so as to rotate in the normal direction and then instantaneously applying the torque so as to rotate in the reverse direction, and then torque is applied so as to rotate in the forward direction again.

When the drum 40 rotates, the washing water rinsed through the through holes 47 formed in the drum 40 and the laundry are rubbed to be washed. When the laundry is positioned at the highest point of the drum 40, It can be said that the washing is performed by the washing.

7 (d) is a view showing a swing motion. The swing motion causes the washing motor 93 to rotate the drum 40 in both directions and to rotate the drum 40 at a position less than about 90 degrees in the rotational direction of the drum 40 45 degrees, but not necessarily limited to, an angular position greater than 45 degrees within a range not exceeding 90 degrees). For example, when the washing motor 93 rotates the drum 40 counterclockwise at about 40 rpm, the laundry located at the lowest point of the drum 40 is raised counterclockwise by a predetermined height. At this time, the washing motor 93 stops the rotation of the drum 40 before the laundry reaches the position of about 90 degrees in the counterclockwise direction, so that the laundry is rotated in the counterclockwise direction at a position less than about 90 degrees, As shown in FIG.

After the rotation of the drum 40 is stopped, the washing motor 93 rotates the drum 40 clockwise at about 40 RPM to rotate the laundry 40 in the rotating direction of the drum 40 So as to rise to a predetermined height. The washing motor 93 is controlled so that the rotation of the drum 40 is stopped before the laundry reaches the position of about 90 degrees in the clockwise direction so that the laundry is moved to the drum 40 at a position less than about 90 degrees clockwise, As shown in FIG.

That is, the swing motion is a motion in which the forward rotation / stop and the reverse rotation / stop of the drum 40 are repeated. Visually, the laundry located at the lowest point of the drum 40 passes through the third quadrant of the drum 40, And then drops smoothly after passing through the fourth quadrant of the drum 40, rises to the first quadrant, and then drops smoothly. That is, the swing motion visually becomes a form in which the laundry flows in the form of an eight-letter lying sideways over the third and fourth quadrants of the drum 40.

At this time, the braking of the washing motor 93 is suitable for power generation braking. The power generation braking minimizes the load generated in the washing motor 93, minimizes the mechanical wear of the washing motor 93, and makes it possible to control the impact applied to the laundry.

The power generation braking is a braking system that uses the fact that the washing motor 93 serves as a generator due to rotational inertia when the current applied to the washing motor 93 is turned off. The direction of the current flowing through the coil of the washing motor 93 is opposite to the direction of the current before the power supply is turned off so that the force Fleming's right-hand rule) acts to brake the washing motor 93. Unlike reverse braking, the power generation braking does not brakes the washing motor 93 suddenly, so that the rotation direction of the drum 40 is smoothly switched.

7 (e) is a view showing a scrub motion. The scrub motion is a motion in which the washing motor 93 rotates the drum 40 alternately in both directions and the laundry is dropped at a position of about 90 degrees or more in the rotating direction of the drum 40.

For example, when the washing motor 93 rotates the drum 40 in the forward direction at about 60 rpm or more, the laundry located at the lowest point of the drum 40 ascends a predetermined height in the forward direction. At this time, when the washing motor 93 reaches a position corresponding to a predetermined angle (preferably, 139 to 150 degrees, but not necessarily limited to 150 degrees or more) A reverse torque is applied to the drum 40 to temporarily stop the rotation of the drum 40. [ Then, the laundry on the inner circumferential surface of the drum 40 drops rapidly.

Thereafter, the washing motor 93 rotates the drum 40 in the reverse direction at about 60 rpm or more, and raises the dropped laundry to a predetermined height of 90 degrees or more in the reverse direction again. The washing motor 93 again provides a reverse torque to the drum 40 so that the rotation of the drum 40 is stopped at a predetermined time (for example, The laundry in the inner peripheral surface of the drum 40 is dropped toward the lowest point of the drum 40 at a position of 90 degrees or more in the reverse direction

The scrub motion causes the laundry to be washed down by allowing the laundry to drop rapidly at a predetermined height. At this time, the washing motor 93 is preferably reverse-phase braked for braking the drum 40.

The rotating direction of the drum 40 is rapidly changed so that the laundry does not deviate greatly from the inner circumferential surface of the drum 40, so that the effect of scratching very strongly can be obtained.

The scrub motion repeats that the laundry that has passed through the third quadrant in the forward direction and has moved to the second quadrant suddenly drops and moves back to the quadrant of the fourth quadrant in the reverse direction and then drops to a portion of the first quadrant. Therefore, the laundry is visually inspected and repeatedly lowered along the inner circumferential surface of the drum 40.

FIG. 7 (f) is a view showing a filtration motion. In the filtration motion, the washing motor 93 rotates the drum 40 so that the laundry is not separated from the inner circumferential surface of the drum 40 due to the centrifugal force. In this process, the washing motor 93 rotates the drum 40 through the nozzles 83a and 83b, .

The laundry is sprayed to the inside of the drum 40 while the laundry is spread on the inner circumferential surface of the drum 40 after the laundry is unfolded so that the washing water penetrates through the laundry by the centrifugal force, And then escapes to the tub 31.

The filtration motion broadens the surface area of the laundry, while the washing water permeates the laundry, so that the laundry is evenly moistened.

7 (g) is a diagram showing a squeeze motion. The squeeze motion reduces the rotational speed of the drum 40 after the washing motor 93 rotates the drum 40 so that the laundry does not fall off the inner circumferential surface of the drum 40 due to the centrifugal force, And the washing water is sprayed into the drum 40 through the nozzles 83a and 83b while the drum 40 is rotating.

The filtration motion continues to rotate at a speed at which the laundry does not fall from the inner circumferential surface of the drum 40 but the squeeze motion changes the rotating speed of the drum 40 so that the laundry is repeatedly contacted with and separated from the inner circumferential surface of the drum 40 .

8 is a graph comparing cleaning power and vibration level of drum driving motions. In FIG. 8, the axis of abscissas represents the cleaning force, and the dirt contained in the laundry is easily separated toward the left. The vertical axis indicates the vibration or noise level, and the vibration level increases toward the upper side, but the washing time for the same laundry decreases.

The step motion and the scrub motion are motions suitable for a washing course in order to shorten the washing time and when the laundry is contaminated by the washing power. In addition, step motion and scrub motion are motions with high levels of vibration and noise. Thus, it is undesirable motion for a laundry course where the laundry is sensitive or when the laundry course needs to minimize noise and vibration.

Rolling motion is a motion characterized by excellent cleaning power, low vibration level, minimal damage to laundry and low motor load. Therefore, it is applicable to all washing courses, but it is particularly suitable for initial detergent dissolving and laundry wetting. However, rolling motion has a disadvantage that washing time is longer when washing is performed to the same level as that of tumbling motion instead of low vibration level.

In tumbling motion, the cleaning force is lower than the scrub motion, but the vibration level is intermediate between the scrub motion and the rolling motion. Tumbling motion is applicable to all laundering courses, but it is particularly useful for the step for bubble dispersion.

Squeeze motion is similar to tumbling motion, and vibration level is higher than tumbling motion. The squeeze motion is useful for the step of rinsing since the washing water is discharged to the outside of the drum 40 through the laundry in the process of repeating the contact and separation of the laundry on the inner circumferential surface of the drum 40. [

In the filtration motion, the cleaning force is lower than the squeeze motion, and the degree of noise is motion similar to rolling motion. In the filtration motion, since the laundry is in close contact with the inner circumferential surface of the drum 40, the washing water passes through the laundry and is discharged to the tub 31. This is a useful motion for wetting the laundry or adding detergent water to the laundry in the early stage of washing.

Swing motion is the lowest vibration level and lowest motion. Thus, swing motion is a motion that is useful for low noise or low vibration washing courses and is suitable for sensitive gentle care.

Fig. 9 is a diagram referred to explain the jetting motion in each drum driving motion of the present invention in comparison with the conventional one. 9A is a graph showing the rotational speeds of the drum 40 or the washing motor 93 for each drum driving motion and FIG. 9B is a graph showing the rotational speeds of the drum 40 and the washing motor 93 in the conventional washing machine having the constant- (C) is a graph showing the rotational speed of the circulating pump motor 92 in each drum driving motion in the washing machine according to the embodiment of the present invention, and (d) is a graph showing the rotating speed of the pump motor, (E) is a diagram showing the state of ejection through the nozzles 83a and 83b in each drum driving motion (hereinafter referred to as "ejection ") in the washing machine according to the embodiment of the present invention, Quot; injection motion ").

Referring to FIG. 9, since the conventional washing machine can not change the speed of the pump motor, even if the drum driving motion is changed, the pump motor always has to rotate at a constant speed. Therefore, in the conventional washing machine, the water stream injected through the nozzle can not effectively cope with the movement of the cloth caused by the type of the drum driving motion, and it is difficult to manage the power consumption, the washing performance, the spraying performance and the like. The present invention attempts to solve the above problems by properly controlling the rotational speed of the circulating pump motor 92 in accordance with the drum driving motion and further considering the amount of the discharged fluid in this process.

Particularly, when the pawder sticks to the inner peripheral surface 42 of the drum 40 by the rotating drum 40 and reaches the predetermined height, the drum 40 is separated from the inner peripheral surface 42 by braking, (For example, swing motion, step motion or scrub motion), the rotational speed of the circulating pump motor 92 is varied within a predetermined range in the case of drum driving motions (hereinafter referred to as " , And the range is set according to the amount.

In the case of the rolling motion, the tumbling motion, and the filtration motion, the rotational speed of the circulating pump motor 92 is set in accordance with the amount of the discharged air in the section where the rotational speed of the circulating pump motor 92 is kept constant.

9 (c), in the case of rolling motion, swing motion, step motion, scrub motion and filtration motion, the rpm of the pump motor 92 can be controlled in a different manner. In the drawing, the rpm of the pump motor 92 in the case of a large amount of oil is shown by a solid line, and the rpm of the pump motor 92 in the case of a small amount of oil is shown by a dotted line. In the case of the tumbling motion, the rpm of the pump motor 92 can be controlled in the same manner irrespective of the amount of fluid.

In each of the drum driving motions shown in Fig. 9, the operation of the washing motor 93 and the circulating pump motor 92 are interlocked with each other. Hereinafter, the manner in which the washing motor 93 and the circulating pump motor 92 are controlled will be described with reference to FIG. In Fig. 9, A1 to A6 denote control steps of the washing motor 93, and B1 to B6 denote control steps of the circulating pump motor 92. Fig.

When the predetermined drum driving motion is performed in the course of operation of the washing machine, the control unit 91 controls the washing motor 93 and the circulating pump motor 92 according to a predetermined method for each drum driving motion.

Specifically, the control unit 91 starts driving the washing motor 93 (A1) and accelerates the washing motor 93 (A2). A sensor for sensing the rotational angle of the drum 40 may be provided and a rotational angle of the drum 40 sensed by the sensor may be defined as a value defined by a drum driving motion (hereinafter referred to as a "motion angle"). (A3), the control unit 91 can control the washing motor 93 to decelerate (A4).

In the case of the rolling motion, the tumbling motion and the filtration motion, since the rotation of the drum 40 is continuous for one or more revolutions, the motion angle? Has a value of 360 degrees or more.

On the other hand, in the case of the drop-induced motions caused by braking such as swing motion, step motion, and scrub motion, it is preferable that the motion angle &amp;thetas;Lt; / RTI &gt; For example, the motion angle [theta] is a value between 30 and 45 degrees for swing motion, a value between 146 and 161 degrees for step motion, and a value between 139 and 150 degrees for scrub motion .

 The drum 40 is decelerated and stopped, whereby the drum driving motion is completed once and the drum driving motion is again performed (A5). The control unit 91 repeats the steps A2 to A5 until the number of times of execution of the drum driving motion reaches a predetermined number, and stops the operation of the washing motor 93 when the number of times reaches the set number of times (A6).

On the other hand, when the driving of the washing motor 93 is started in step A1, the control unit 91 applies the start signal SG1 to the circulating pump motor 92 and supplies the start signal SG1 to the circulating pump motor 92 is started (B1). Then, the control unit 91 accelerates the circulating pump motor 92 according to the setting determined for each drum driving motion based on the motion information (that is, the information about the drum driving motion currently being performed) (B2).

On the other hand, in step A3, when the rotational angle of the drum 40 reaches the motion angle?, The control unit 91 applies the angle control completion signal SG2 to the circulating pump motor 92. [

In the case of the bottom-up inducing motion by braking, the circulating pump motor 92 at B2 reaches the upper limit value Pr (V, H) determined by the drum driving motion in response to the angle control completion signal SG2 (Or braking of the circulating pump motor 92) and decelerates (B4, B5) according to the setting determined for each drum driving motion.

The control unit 91 applies the restart signal SG3 to the circulating pump motor 92 and the circulating pump motor 92 supplies the restart signal SG3 to the circulating pump motor 92. In this case, (B5) when the rotational speed reaches the lower limit value Pr (V, L) determined for each drum driving motion as a response to the command SG3, and repeats the steps B2 to B5.

On the other hand, in the case of swing motion, tumbling motion, or filtration motion, when the angle control completion signal SG2 is applied to the circulation pump motor 92, the circulation pump motor 92 maintains a predetermined rotation speed for each drum drive motion Rotating. Accordingly, in the case of these motions, in response to the angle control completion signal SG2, deceleration of the circulating pump motor 92 is performed (B4).

On the other hand, in the case of any drum driving motion or when the washing motor 93 is stopped in step A6, the control section 91 applies the stop signal SG4 to the circulating pump motor 92, The circulating pump motor 92 is stopped.

As shown in Fig. 11, the washing machine may be configured to sequentially perform a water / sedimentation stroke, a dehydration stroke, a stroke, and a dehydration stroke. Watering / sedimentation is an administration that watering with a detergent and wetting the soil.

The washing cycle may be a rolling motion and a tumbling motion as a stroke for rotating the drum 40 according to a predetermined algorithm to remove contamination on the laundry.

The dewatering process is a process of draining water and removing water from the dewatering device while rotating the drum 40 at a high speed.

The rinsing step is a step of removing the detergent on the bobbin, the water supply is performed, the rolling motion and the tumbling motion can be performed, and then the dewatering stroke can be performed again.

Hereinafter, the control method for the washing motor 93 and the circulating pump motor 92 for each drum driving motion will be described in more detail.

<Rolling / tumbling motion>

12 is a graph showing the speed (a) of the washing motor and the speed (b) of the pump motor in the rolling motion and the tumbling motion. 16 is a graph in which the speed of the pump motor in each drum driving motion is compared with a time when the amount of the sweep falls within the first sweep range I and a time when the sweep falls within the second sweep range II.

The method for controlling the washing machine according to the embodiment of the present invention is a method for controlling the washing machine in which the drum 40 is rotated in one direction so that the laundry on the inner circumferential surface of the drum 40 falls at a position raised to a position corresponding to less than about 90 degrees of rotation of the drum 40 A first step of rotating the drum 40 in one direction so that the laundry on the inner circumferential surface of the drum 40 falls at a position higher than the position corresponding to less than 130 degrees of rotation of the drum 40, It includes two steps. The second step may be performed after the first step, but the present invention is not limited thereto, and the second step may be performed before the first step.

During the first step, the number of revolutions of the pump 36 is controlled to a predetermined first number of revolutions, and during the second step, the number of revolutions of the pump 36 is higher than the first number of revolutions And is controlled by two revolutions.

The driving motion of the drum 40 in the first step may correspond to the rolling motion. The driving motion of the drum 40 in the second step may be rolling motion or tumbling motion, but is preferably tumbling motion. That is, the second step may be a step of performing tumbling motion in which the drum is rotated in one direction so that laundry on the inner circumferential surface of the drum 40 is dropped at a position corresponding to a rotation angle of about 90 to 110 degrees of the drum 40 .

Hereinafter, it is exemplified that the first step is a rolling motion and the second step is a tumbling motion.

12 and 16, the rolling motion and the tumbling motion are performed in a state in which water is contained in the tub 31 so that the water flow can be injected through the nozzles 83a and 83b. 12, the control unit 91 controls the washing motor 93 so that the laundry on the inner circumferential surface of the drum 40 reaches a position corresponding to less than about 90 degrees of rotation of the drum 40 The drum 40 is rotated in one direction so as to fall at the raised position. At the time of rolling motion, the washing motor 93 or the drum 40 is accelerated to the rotational speed Dr (R), and can be rotated while maintaining the Dr (R) for a certain period of time. The rotation speed Dr (R) is preferably 37 to 40 rpm, but it is not necessarily limited thereto.

During the rolling motion, the rotational speed of the circulating pump motor 92 is controlled to a predetermined rotational speed Pr (R). 10), t (SG4) is the time when the start of the angle control completion signal SG2 (see FIG. 10), t (SG2) Signal SG3 (see Fig. 10). Hereinafter, the same is also displayed in another embodiment.

The rotational speed Pr (R) may be set according to the amount of discharged. Prior to the execution of the drum driving motion, the control section 91 rotates the washing motor 93 and can detect the laundry amount in this process. The amount of the laundry may be determined on the basis of the principle that the rotational inertia of the drum 40 varies according to the amount of the laundry charged into the drum 40. For example, It is determined on the basis of the time taken to reach the target speed or on the basis of the acceleration slope of the washing motor 93 or on the basis of the time taken to stop the washing motor 93 in the process of braking the washing motor 93, , Or can be obtained based on the back electromotive force of the generator. However, it is needless to say that the known techniques can be applied to the washing machine in the field of washing machine technology since various methods for obtaining the washing amount have been known. Although not described below, it is assumed that a step of detecting the amount of laundry is carried out before the execution of each drum driving motion is performed.

The control unit 91 can set the rotational speed Pr (R) in accordance with the lot amount range to which the detected lot amount belongs. For example, the replenishment amount can be subdivided from the first level to the ninth level, and the replenishment amount range can be divided into a small amount (or a first replenishing amount range (I), see FIG. 16) II), see FIG. 16), a small amount is detected when the detected amount is from the first level to a fourth level, and a large amount is classified when the detected amount is from the fifth level to the ninth level. However, the present invention is not limited to this, and it is also possible that the coverage amount is classified into each level.

In the embodiment, the rotational speed Pr (R) is set to be higher than when the amount of the large amount is small. For example, in the case of a small amount, the rotational speed Pr (R) may be set to 2800 rpm, and in the case of a large amount, the rotational speed Pr (R) may be set to 3100 rpm. Particularly, in the case of a small amount of the cloth, most of the cloth moves at the front portion of the drum 40, so that the water stream ejected from the nozzles 83a and 83b does not need to touch the rear surface 41 of the drum 40 (2800 rpm or less, see Fig. 6).

Conversely, when the amount of the laundry is large, the laundry reaches the center of the drum 40, so that the water jetted from the nozzles 83a and 83b must reach the center of the drum 40, It is preferable that the rotational speed of the circulating pump motor 92 is approximately 3000 rpm or more, preferably 3100 rpm or more, .

In the case of tumbling motion, the control of the washing motor 93 and the circulating pump motor 92 takes place in a manner similar to rolling motion. It should be noted that the rotational speed Dr (R) of the washing motor 93 is higher than that of the rolling motion and the rotational speed Pr (T) of the circulating pump motor 92 is also higher than that of the rolling motion The rotation speed Dr (T) of the washing motor 93 is preferably 46 rpm, but it is not necessarily limited thereto.

On the other hand, in the case of tumbling motion, it is important to apply a stronger mechanical force to the bell than in the case of rolling motion, so that the water pressure injected through the nozzles 83a and 83b needs to be sufficient irrespective of the amount of bellows. Therefore, in the case of the tumbling motion, the circulating pump motor 92 can be rotated at a constant speed having a value between 3400 and 3600 rpm irrespective of the batch amount. However, it is needless to say that the rotational speed Pr (T) may be set to be higher than the case of a small amount when the amount is large. For example, in the case of a small amount, the rotation speed Pr (T) may be set to 3400 rpm, and in the case of a large amount, the rotation speed Pr (T) may be set to 3600 rpm.

The steps of controlling the pump 36 while performing the above-described rolling motion and tumbling motion are suitable for the washing and / or rinsing operations, among the series of washing operations shown in FIG.

<Step / Scrub / Swing motion>

13 is a graph for explaining the operation of the washing motor and the pump motor in swing, scrub, and step motion according to an embodiment of the present invention.

Referring to FIGS. 13 and 16, the control unit 91 controls the rotational speed of the pump motor 92 to be variable while the drum 40 is rotated.

The drop-induced motion by braking is performed in a state in which water is contained in the tub 31 so that the water flow can be sprayed through the nozzles 83a and 83b. The control unit 91 controls the washing motor 93 so that the laundry on the inner circumferential surface 42 of the drum 40 is kept in contact with the drum 40 by the centrifugal force The washing motor 93 can be accelerated. The control unit 91 causes the laundry motor 93 to accelerate so that the bag drops from the inner circumferential surface 42 after the drum 40 is rotated at a speed at which the bag 40 is lifted without falling from the inner circumferential surface 42 of the drum 40 Thereby braking the washing motor 93. That is, at the time of the drop-induced motions by braking, the washing motor 93 rises to a predetermined rotational speed Dr (V) and decelerates until it stops.

The rotational speed Dr (V) may be set differently for each drum driving motion. Since the rotational speed Dr (V), that is, the maximum rising height of the gun increases in the order of swing motion, scrub motion and step motion, a larger centrifugal force must act in order of the motions, (V)) may also be set to a larger value in the order of the motions.

However, the maximum rise height of the gun in the fall-induced motions by braking is determined by the rotation angle (or the motion angle?) At which the drum 40 is braked. The rotation speed Dr (V) (Or the height at which the carriage starts to fall) may also vary if the motion angle? In each motion is set differently, even if the swing motion, the scrub motion, and the step motion are all set to be the same have. In either case, it is preferable that the motion angle? Is set to be high in the order of swing motion, scrub motion, and step motion. For example, the motion angle may be in the range of 30 to 45 degrees in the swing motion, 139 to 150 degrees in the scrub motion, and 146 to 161 degrees in the step motion, Lt; / RTI &gt;

On the other hand, the control unit 91 can increase the rotational speed of the pump motor 92 while the laundry is rising (or while the washing motor 93 is accelerating) while the bottom-up inducing motion by braking is being performed have.

The control unit 91 may decelerate the rotating speed of the pump motor 92 while the laundry is falling (or when the washing motor 93 is decelerated by braking) during the falling-causing motions by braking have.

That is, the control unit 91 can control the pump motor 92 to accelerate in accordance with the acceleration of the washing motor 93 and decelerate corresponding to the braking of the washing motor 93.

The pump motor 92 can be varied within a range of rotation speed set for each drum driving motion. 13 shows the upper limit value of the rotation speed range by the maximum rotation speed Pr (V, H) and the lower limit value by the minimum rotation speed Pr (V, L).

Prior to the execution of the drum driving motion, the control section 91 rotates the washing motor 93 and can detect the laundry amount in this process. The method of detecting the amount of overflow may be configured as described above in the description of the rolling / tumbling motion, or may employ other methods.

The rotational speed range can be set according to the amount of the discharged fluid. That is, the control unit 91 can set the maximum rotation speed Pr (V, H) and the minimum rotation speed Pr (V, L) in accordance with the amount of discharged. In each drum driving motion, the rotational speed range can be set to a higher band as the volume increases.

For example, in the case of the scrub motion, when the sensed amount of the pulp belongs to a small amount (or the first pulley amount range I, see Fig. 16), the rotational speed of the pump motor 92 becomes the minimum rotational speed Pr , L), and 3100 rpm, which is the maximum rotational speed Pr (V, H). 16), the rotational speed of the pump motor 92 is set to 3400 rpm, which is the minimum rotational speed Pr (V, L), and the maximum rotational speed Pr (V, L) And can be varied between 3600 rpm, which is the rotational speed Pr (V, H).

The rotational speed of the pump motor 92 is set to the minimum rotational speed Pr (V, L) in the case of step motions, when the sensed quantity falls within a small amount (or the first take-up range I, , And 2500 rpm, which is the maximum rotational speed Pr (V, H). 16), the rotational speed of the pump motor 92 is set to 3400 rpm, which is the minimum rotational speed Pr (V, L), and the maximum rotational speed Pr (V, L) And can be varied between 3600 rpm, which is the rotational speed Pr (V, H).

On the other hand, in the case of the swing motion, a range in which the rotational speed of the pump motor 92 varies depending on the amount of the sweep motion can be set in the same manner as the scrub motion or the step motion. At this time, the pump motor 92 is set within a range (for example, 2200 to 2800 rpm, see FIG. 6) in which the water jetted from the nozzles 83a and 83b does not touch the rear surface 41 of the drum 40 .

However, in the case of the swing motion, since the drop of the bag is not large compared to the scrub motion or the step motion, the range of the rotational speed of the pump motor 92 can be fixed regardless of the amount of the swing motion. For example, The pump motor 92 can be varied between 2200 rpm, which is the lowest rotational speed Pr (V, L), and 2800 rpm, which is the maximum rotational speed Pr (V, H), both in small amounts and in large amounts .

Hereinafter, the operation of the washing motor and the pump motor in the swing, scrub, and step motion according to one embodiment of the present invention will be described in more detail with reference to FIGS. 10, 13, and 16. FIG.

10 and 13A, when the washing motor 93 is driven (A1) and the start signal SG1 is generated (t (SG1)), the controller 91 drives the pump motor 92 (B1).

The control unit 91 can accelerate the washing motor 93 to the set maximum rotational speed Dr (V) (A2).

When the pump motor 92 starts driving, the control unit 91 can control the pump motor 92 to accelerate based on the motion information (B2).

The control unit 91 can accelerate the pump motor 92 to the maximum rotation speed Pr (V, H). When the pump motor 92 reaches the target RPM (Pr (V, H)), the control unit 91 can stop the acceleration and limit the speed (B3).

The control unit 91 can rotate the washing motor 93 up to the set motion angle [theta]. The control unit 91 controls the washing motor 93 so that the time when the washing motor 93 reaches the maximum rotational speed Dr (V) and the time when the washing motor 93 rotates to the motion angle? 93).

The control unit 91 completes the control of the washing motor 93 to the motion angle? At step A3 and generates the angle control completion signal SG2 at time t (SG2) The motor 92 can be decelerated (B4).

That is, when the angle control completion signal SG2 is generated in the state B3 in which the speed reaches the target RPM (Pr (V, H)) and the speed is limited A3), and the pump motor 92 can be decelerated (B4).

13, the control unit 91 determines whether or not the time t (SG2) at which the washing motor 93 reaches the maximum rotational speed Dr (V) and the time t (SG2) when the pump motor 92 reaches the maximum rotational speed Pr The washing motor 93 and the pump motor 92 can be controlled so that the point of time t (SG2) at which the washing water reaches the washing tub (V, H).

Actually, when the washing motor 93 reaches the control completion (or reaches the maximum rotation speed Dr (V)) to the motion angle (A3) (A3) and the point at which the angle control completion signal SG2 is generated the time required for the control section 91 to process the signal or the time at which the signal is transmitted and the time at which the control section 91 starts to decelerate the pump motor 92 based on the generated angle control completion signal SG2, The same delay can occur.

13 indicates that the time t (SG1) at which the washing motor 93 reaches the maximum rotational speed Dr (V) and the time t (SG1) when the pump motor 92 reaches the maximum rotational speed Pr (T (SG1) at which the washing motor 93 reaches the maximum rotational speed Dr (V)) and the time t (SG1) at which the washing motor 93 reaches the maximum rotational speed Dr (V), without intentionally intentionally making a time difference, Can be interpreted to mean that the control is performed for the purpose of making the time when the rotational speed Pr (V, H) reaches the maximum rotational speed Pr (V, H).

When the control unit 91 has completed the control of the washing motor 93 to the motion angle? (Or reaches the maximum rotational speed Dr (V)) (A3), the control unit 91 can decelerate the washing motor 93 (A4). Alternatively, when the control unit 91 has completed the control of the washing motor 93 to the motion angle? (Or reaches the maximum rotational speed Dr (V)) (A3) .

The control unit 91 controls the washing motor 93 in the case of a motion in which acceleration and deceleration of the washing motor 93 are repeated plural times (for example, step motion, scrub motion, swing motion) based on the motion information The process may return to step A2 to restart the steps A2 to A4 (A5).

The control unit 91 can decelerate the pump motor 92 to the minimum rotational speed Pr (V, K). When the pump motor 92 reaches the target RPM (Pr (V, L)), the control unit 91 can stop the deceleration and limit the speed (B5).

When the restart signal SG3 is generated, the control unit 91 returns to the step B2 for accelerating the pump motor 92 and restarts the steps B3 to B4 (B5).

13, when the pump motor 92 is braked (rpm = 0) and the restart signal SG3 is generated (t = SG3), the pump motor 92 can be restarted.

That is, when the restart signal SG3 is generated in the state B5 in which the speed reaches the target RPM (Pr (V, L)) and the speed is restricted, SG3), the pump motor 92 can be accelerated again (B2).

13, the control unit 91 determines whether or not the time t (SG3) at which the washing motor 93 is braked and the time when the pump motor 92 reaches the minimum rotational speed Pr (V, L) The washing motor 93 and the pump motor 92 can be controlled so that the point of time t

However, actually, the control section 91 is provided between the time t (SG3) at which the restart signal SG3 is generated and the time at which the pump motor 92 starts to accelerate based on the generated restart signal SG3 Delays can occur, such as processing time or signal propagation time. This may be understood as a reason such as the delay occurring between the time point at which the angle control completion signal SG2 is generated and the point at which the pump motor 92 starts to decelerate, as described above.

When it is determined that the set operation is completed based on the motion information, the control unit 91 can control the washing motor 93 to stop (A6).

The control unit 91 can control the pump motor 92 to stop when the washing motor 93 is stopped and the stop signal SG4 is generated t (SG4) (A6).

That is, when the stop signal SG4 is generated in the state B5 in which the speed reaches the target RPM (Pr (V, L)), SG4), the pump motor 92 can be stopped (B6). Here, to stop the pump motor 92 means to start the control so that the pump motor 92 stops, or to stop the pump motor 92 so as to stop corresponding to the stopping point of the washing motor 93 . &Lt; / RTI &gt;

13, the control unit 91 controls the washing operation such that the time t (SG4) at which the washing motor 93 is stopped and the time t (SG4) at which the pump motor 92 is stopped correspond to each other, The motor 93 and the pump motor 92 can be controlled.

However, actually, between the time point t (SG4) at which the stop signal SG4 is generated and the time point at which the pump motor 92 is stopped based on the generated stop signal SG4, the control section 91 performs the processing Delays can occur, such as the time required or the time the signal is delivered. This may be understood as a reason such as the delay occurring between the time point at which the angle control completion signal SG2 is generated and the point at which the pump motor 92 starts to decelerate, as described above.

<Filtration motion>

14A shows the change in the number of revolutions (a) of the drum and the change in the number of revolutions (b) of the pump according to the embodiment of the present invention.

Fig. 15 shows an arrangement of the laundry in the drum during the filtration motion, wherein (a) shows a case where a small amount of laundry is put into the drum, and (b) shows a case where a large amount of laundry is put in.

The method of controlling a washing machine according to an embodiment of the present invention includes rotating the drum 40 in one direction so that the laundry in the drum 40 does not fall on the inner circumferential surface of the drum 40. This step corresponds to the above-described filtration motion.

14A, 15 and 16, while the filtration motion is being performed, the control unit 91 controls the circulation pump motor 92 while the drum 40 rotates in one direction (preferably one rotation or more) So that the rotational speed Pr (F) When the rotation speed of the drum 40 starts to increase in the process of the filtration motion, the centrifugal force acting on the laundry is also increased, and the laundry, which is located near the inner peripheral surface of the drum 40, Respectively. That is, in the course of the filtration motion, when the rotational speed of the drum 40 starts to increase to reach a predetermined rotational speed Dr (F), sufficient centrifugal force is applied to the laundry placed in the center of the drum 40 (Preferably all of the laundry) in the drum 40 is positioned relative to the drum 40 when the rotational speed of the drum 40 is sufficiently raised .

In particular, when the amount of the laundry charged into the drum 40 is equal to or less than a certain level, laundry generally collects on the inlet side of the drum 40 during filtration motion (see FIG. In this case, it is preferable that the rotation speed of the pump 36 is controlled to be low so that the circulating water jetted from the nozzles 83a and 83b falls down to the front side of the drum 40.

On the other hand, when the amount of the laundry introduced into the drum 40 is equal to or higher than a certain level, the empty space surrounded by the laundry is extended rearward from the inlet of the drum 40 in the process of increasing the rotational speed of the drum 40 , And eventually forms a shape as shown in FIG. 15 (b).

The control for raising the rotational speed of the pump 36 during the filtration motion is based on the mechanism for expanding the empty space in the drum 40 as described above in the course of performing the filtration motion . That is, in the process of extending the empty space to the rear of the drum 40, the jetting pressures of the nozzles 83a and 83b are also raised so as to be interlocked with each other so that the water flow can reach the deep inside of the drum 40 will be.

In the filtration motion, the control unit 91 accelerates the washing motor 93 until it reaches the predetermined rotational speed Dr (F), and when the rotational speed Dr (F) reaches the rotational speed Dr (F) Dr (F)). The rotational speed Dr (F) is determined within a range in which the rotational speed Dr (F) sticks to the inner circumferential surface of the carriage drum 40. The rotational speed Dr (F) is set between 80 rpm and 108 rpm.

The control unit 91 can accelerate the washing motor 93 to the rotational speed Dr (F) at the set first acceleration slope Ag1. The control unit 91 can set the first acceleration slope Ag1 based on the time tr1 at which the vehicle reaches the maximum rotational speed Dr (F). The time tr1 can be set differently depending on the amount of the replenishment.

Alternatively, the control unit 91 can control the rotation speed Dr (F) to be maintained until the washing motor 93 rotates by the set angle. At this time, the set angle may vary depending on the amount of the cloth.

In the filtration motion, the maximum rotational speed Pr (F) of the circulating pump motor 92 is set in accordance with the amount of discharged fluid. That is, the control unit 91 can set the maximum rotation speed Pr (F) in accordance with the sensed amount. The pump motor 92 is much larger than the maximum rotational speed in the case where the sensed amount of charge falls in a small amount (or in the first charged amount range I, see FIG. 16) See Fig. 16), the maximum rotational speed can be set to a larger value.

At this time, the rotational speed of the pump 36 may be configured to start rising corresponding to a time point t (SG1) at which the rotation of the drum 40 starts to be accelerated. That is, the acceleration of the rotation of the drum 40 and the rise time of the rotation speed of the pump 36 are interlocked (or synchronized).

In the filtration motion, the control unit 91 accelerates the pump motor 92 to a predetermined rotational speed Pr (F), and when the rotational speed Pr (F) is reached, the rotational speed Pr (F) ).

The control unit 91 can accelerate the pump motor 92 to the rotational speed Pr (F) with the set second accelerator trolley Ag2. The second acceleration slope (Ag2) may be set to a value equal to or greater than the first acceleration slope (Ag1).

Alternatively, the control unit 91 may set the second acceleration slope Ag2 based on the arrival time tr2 up to the maximum rotational speed Pr (F). The time (tr2) may vary depending on the amount of the waste.

The control unit 91 can control the pump motor 92 to stop when the washing motor 93 is stopped and the stop signal SG4 is generated (t = t (SG4)).

The method for controlling the washing machine according to the embodiments of the present invention may further include the step of detecting the amount of the laundry in the drum 40 (hereinafter referred to as "the amount of laundry"). Various methods of obtaining bulk are already known. For example, the control unit 91 accelerates the drum 40 in a state in which the laundry (or cloth) is put in, and determines the amount of laundry based on the time taken until the rotational speed of the drum 40 reaches the predetermined rotational speed . However, the present invention is not limited to this, and it is also possible to obtain the replenishment amount using another known method.

The step of controlling the pump 36 while carrying out the above-described filtration motion is suitable for a water supply / sedimentation stroke or a rinsing stroke among the series of strokes according to Fig.

The control method of the washing machine constructed as described above uses the filtration motion and the filtration spraying in the rinsing step to cause the water flow to flow from the front portion of the drum 32 toward the rear portion 322, So that the rinsing effect can be improved.

In addition, by spraying water evenly on the laundry during the filtration motion, the laundry can be attached to the drum 32 well.

FIG. 14B shows the change in the number of revolutions (a) of the drum and the change in the number of revolutions (b) of the pump according to another embodiment of the present invention.

14B, the control unit 91 can accelerate the washing motor 93 so that the laundry in the drum 40 rotates while being in contact with the inner circumferential surface 42 of the drum 40. [

The control unit 91 can accelerate the washing motor 93 until the maximum rotational speed Dr (F) is reached with the first acceleration slope Ag1.

The control unit 91 can accelerate the pump motor 92 in response to the acceleration of the washing motor 93 so that water is sprayed through the nozzles 83a and 83b.

The control unit 91 can accelerate the pump motor 92 until the maximum rotational speed Pr (F, H) is reached at the second acceleration slope Ag2. The control unit 91 can set the second acceleration slope Ag2 of the pump motor 92 to correspond to the first acceleration slope Ag1 of the washing motor 93. [

For example, the control unit 91 can set the value of the second acceleration slope (Ag) in proportion to the first acceleration slope (Ag1).

The controller 91 accelerates the washing motor 93 to the set maximum rotational speed Dr (F), and then rotates the first rotational speed Dr (F) at which the laundry rotates while being in contact with the drum 40 . The first rotation speed Dr (F) may be set to a value equal to or less than the maximum rotation speed Dr (F). In the present embodiment, a case where the first rotation speed Dr (F) is set to the same value as the maximum rotation speed Dr (F) will be described as an example.

The control unit 91 can accelerate the pump motor 92 after decelerating the pump motor 92 within the set rotation range while maintaining the washing motor 93 at the first rotational speed Dr (F).

6, the drum 40 is configured such that the space between the opened front face and the rear face 41 divides the drum 40 viewed from the side into three equal halves to form the first area, the second area and the third area Area. &Lt; / RTI &gt;

The control unit 91 controls the flow of the water stream from the second region to the first region while maintaining the washing motor 93 at the first rotational speed Dr (F) The pump motor 92 can be controlled so as to be changed.

For example, the control unit 91 controls the pump motor 92 at the maximum rotation speed (2,300 rpm) set based on the amount of discharged water, so that the orientation point of the water stream injected through the nozzles 83a and 83b is directed toward the third area The pump motor 92 is controlled at the set minimum rotation speed (1300 rpm), and the pump motor 92 can be decelerated so that the directivity point of the water flow is directed to the first region.

The control unit 91 can sense the amount of the laundry in the drum 40 before accelerating the washing motor 93 at the maximum rotational speed. As for the method of detecting the amount of waste, the above-described method or other known methods can be used, and thus a detailed description thereof will be omitted.

The control unit 91 can set a range in which the water stream is sprayed in the drum 40 through the nozzles 83a and 83b based on the sensed amount.

6, the space between the opened front face and the rear face 41 of the drum 40 divides the drum 40 viewed from the side into nine equal parts, and the area less than 1/3H is divided into nine areas, , A second area, and a third area. The drum 40 may be defined as a fourth region, a fifth region and a sixth region in order from anterior to an area of 1/3H or more to less than 2 / 3H.

For example, in Fig. 6, when the sensed amount is small, the control unit 91 determines that the directivity point of the water stream injected through the nozzles 83a and 83b is the height from the inner peripheral surface 42 of the drum 40 The pump motor 92 can be controlled so as to vary within the range of the first to third regions of less than 1 / 3H.

For example, in the case where the detected amount is large, the control unit 91 determines that the directivity point of the water stream injected through the nozzles 83a and 83b changes within the range of the first to third regions and the sixth region And the pump motor 92 can be controlled. That is, when the control unit 91 reaches the maximum rotation speed Pr (F, H), the control unit 91 controls the pump motor (not shown) so that the water flow, which is injected through the at least one nozzle, reaches the rear surface 42 of the drum 40 92).

According to the control method of the washing machine structured as described above, water can be uniformly sprayed onto the laundry in the drum by controlling the region where the water is sprayed in accordance with the amount of laundry, thereby improving the washing effect.

In addition, as described above, as the drum accelerates, the position of the laundry is fixed from the front portion of the drum. Also, the water to be sprayed is also sprayed from the front portion to the rear portion of the drum in correspondence with the acceleration of the washing motor, As shown in FIG.

Further, when an empty space surrounded by the can is formed by the filtration, the water stream can be sprayed to the can adjacent to the rear portion 322 of the drum 32 through the empty space.

Further, the filtration motion and the filtration spraying are used in the rinsing step to make the water flow from the front portion of the drum 32 toward the rear portion 322, thereby pushing the foam toward the rear portion 322 to improve the rinsing effect You can.

The controller 91 decelerates the speed of the motor to reach the upper limit Pr (F, H) of the rotation range and repeats the process of accelerating again when reaching the lower limit Pr (F, L) Can be controlled.

Alternatively, the control unit 91 may control to repeat the acceleration and deceleration of the pump motor 92 for each set time interval. The pump motor 92 can be decelerated even when it does not reach the upper limit Pr (F, H) of the rotation range and can be accelerated even when it does not reach the lower limit Pr (F, L) have.

The control unit 91 can set the rotation range of the pump motor 92 based on the sensed amount. The control unit 91 can set the upper limit of the rotation range of the pump motor 92 to be higher as the detected amount of fluid increases.

16, in the case of the filtration motion, when the sensed amount of the pulp belongs to a small amount (or the first pulley amount range I, see Fig. 16), the rotational speed of the pump motor 92 becomes the minimum rotational speed Pr (F, L)) and 2300 rpm, which is the maximum rotational speed Pr (F, H). 16), the rotational speed of the pump motor 92 is set to 1300 rpm, which is the minimum rotational speed Pr (F, L), and the maximum rotational speed Pr (F, L) And can be varied between 3500 rpm, which is the rotational speed Pr (V, H).

As a result, the water sprayed through the nozzle reciprocates forward and backward of the drum 40, thereby increasing the amount of laundry in the drum 40 as a whole, thereby improving the washing effect.

In addition, the water sprayed through the nozzles can be uniformly sprayed without being concentrated in a certain area, thereby improving the wetting of the laundry on the front surface of the drum 40.

The above-described filtration motion with reference to Fig. 14B can be used in the rinsing step among the series of washing operations of Fig. In addition, although a water feeding / spraying step may be used, the following description will be given in detail of the case where the filtering motion is used in the rinsing step.

The control unit 91 can open the drain valve 96 and operate the drain pump so that water is drained from the tub 31 after performing the filtration motion according to Fig. The drain pump may be a pump motor 92. The pump motor 92 supplies hydraulic pressure to the washing water under the control of the control unit 91 so that water is sprayed through the nozzles 83a and 83b or water in the tub 31 is discharged through the drain valve 96 .

The control unit 91 can open the water supply valve 94 so that the undiluted detergent water is supplied into the tub 311 after the water in the tub 31 is drained.

The control unit 91 may repeat the process of performing the filtration motion and draining the water from the tub 31 and supplying the water into the tub 31 for a set number of times or a predetermined time. The control unit 91 can set the number of times or the time to be repeatedly performed based on the amount of laundry in the drum 40. [

The control unit 91 can control the water supplied into the washing machine through the water supply valve to be supplied into the tub 31 via the detergent box in which the washing detergent is received. At this time, since the detergent has already been ejected into the tub 31 in the washing step, the undiluted detergent can be supplied into the tub 31.

Alternatively, the control unit 91 may control the water supplied through the water supply valve 94 to be sprayed into the drum 40 through the direct water nozzle 57.

On the other hand, the control unit 91 can control the water supply valve 94 so that the undiluted detergent water is supplied into the tub 31 during the filtration motion.

For example, the control unit 91 can perform the filtration motion while draining the water in the tub 31 after the filtration motion is performed, and supplying the undiluted detergent into the tub 31 have. That is, it is possible to start the filtration motion while water is being supplied, thereby shortening the time required for the entire washing cycle. Alternatively, the filtration motion may be performed earlier to extend the total operating time, thereby improving the effectiveness of the rinsing cycle.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). In addition, the computer may include a processor or a control unit.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

10: casing 31: tub
40: Drum 60: Gasket
83a: first nozzle 83b: second nozzle
91: control unit 92: circulation pump motor
93: Washing motor

Claims (10)

A tub for containing water; a drum rotatably provided in the tub; at least one nozzle for spraying water into the drum; a washing motor for rotating the drum; A method of controlling a washing machine including a pump for feeding a single nozzle,
(a) accelerating the washing motor so that the laundry in the drum rotates in contact with the inner circumferential surface of the drum, and in response to the acceleration of the washing motor so that water is sprayed through the at least one nozzle, Accelerating the pump motor constituting the pump motor; And
(b) controlling the washing motor to rotate at a first rotational speed, and controlling the pump motor to repeat deceleration and acceleration one or more times within a set rotational range. The method according to claim 1,
Wherein the drum is divided into a plurality of areas including a first area and a second area closer to the rear than the first area, the space between the front surface and the rear surface being opened,
The step (b)
(b-1) a directivity point of a water jet, which is injected through the at least one nozzle, in a state in which the directivity point of the water jet is directed toward the second region, through the at least one nozzle, Decelerating the pump motor so that the pump motor is switched to the region; And
(b-2) accelerating the pump motor so that the directivity point of the water jet injected through the at least one nozzle is changed from the first region to the second region,
Wherein the step (b-1) and the step (b-2) are repeated at least once or more. 3. The method of claim 2,
The rotation range of the pump motor in the step (b)
Wherein a water flow through the at least one nozzle is set to reach the rear surface of the drum when an upper limit of the set rotation range is reached. 3. The method of claim 2,
In the step (b-1), the pump motor,
Decelerates upon reaching the upper limit of the set rotation range,
In the step (b-2), the pump motor,
Is accelerated when reaching the lower limit of the set rotation range. The method according to claim 1,
After the step (b)
(c) draining water from the turbine; And
(d) supplying detergent-untreated water into the tub,
Wherein the steps (a) to (d) are repeated for a predetermined number of times or a predetermined period of time. The method of claim 5, wherein
In the washing machine,
And a direct water nozzle for injecting water supplied through the water supply valve into the drum,
Wherein the step (d) comprises opening the water supply valve and spraying water into the drum through the direct water nozzle. The method according to claim 1,
(a-1) detecting the amount of the laundry in the drum,
Wherein the range in which the water flow is injected into the drum through the at least one nozzle is set based on the laundry amount sensed in the step (a-1). 8. The method of claim 7,
Wherein the range in which the water flow is injected into the drum through the at least one nozzle is set such that the water flow reaches the point nearest to the highest point on the rear surface of the drum as the detected volume increases. The method according to claim 1,
(a-1) detecting the amount of the laundry in the drum,
Wherein the rotation range of the pump motor is set based on the laundry amount sensed in the step (a-1). 10. The method of claim 9,
Wherein the rotation range of the pump motor is set such that the upper limit of the rotation range is set to be higher as the detected amount of the laundry is larger.

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