KR20210082811A - Washing machine and control method thereof - Google Patents

Abstract

The present invention relates to a control method of a washing machine. A washing machine control method according to the present invention comprises: a mode conversion step of moving arrangement of a coupler by operating a solenoid module so that a drive shaft for rotating a pulsator and a dehydration shaft for rotating a washing tub are connected or released; and a mode check step of operating a drive motor which rotates the drive shaft and sensing a load amount of a current output to the drive motor. The mode check step includes a coupler setting step of relocating a position of the coupler by operating the solenoid module when the load amount of the current output to the drive motor does not satisfy a load set value. An object of the present invention is to provide the washing machine capable of adjusting arrangement of the coupler.

Description

Washing machine and its control method {WASHING MACHINE AND CONTROL METHOD THEREOF}

The present invention relates to a washing machine having a clutch operated by a solenoid and a method for controlling the same.

The top-loading washing machine includes a washing tub and a pulsator that rotate to rotate laundry or wash water in a water storage tub. The washing tub rotates with the rotation of the dehydration shaft, the pulsator rotates with the rotation of the drive shaft, and the drive shaft and the dehydration shaft rotate on the same rotation shaft.

However, in order to selectively or simultaneously rotate the washing tub and the pulsator according to the washing method and the washing operation, the driving force according to the rotation of the driving motor may be transmitted to the driving shaft or the dehydrating shaft.

The drive shaft may have a structure that is connected to the drive motor and rotates when the drive motor rotates. In addition, the dehydration shaft may have a structure in which the rotational force of the driving motor is transmitted or not transmitted depending on the arrangement of the coupler.

In Korean Patent Laid-Open Publication No. 10-2001-0002545, a separate motor and link structure for controlling the arrangement of the coupler are included. Such a link structure has a problem of the complexity of the structure and the narrowness of the space according to the complex structure. In addition, in the initial stage of washing, since a separate switch sensor for detecting the position of the coupler must be provided, a problem of cost increase may occur.

Korean Patent Application Laid-Open No. 10-2003-0023316 discloses a structure for controlling the arrangement of a coupler by the operation of a solenoid. In the disclosed structure, the initial arrangement of the coupler can be grasped according to the operation of the solenoid, but in order to maintain the state in which the coupler is moved upward, power must be continuously applied to the solenoid. Problems, if the power is cut off due to abnormal operation, the problem of breakage of the coupler may occur.

In addition, due to a change in the arrangement of the coupler, the structure of the shaft joint between the drive shaft and the dehydration shaft or the shaft joint release is caused by an error in the arrangement of the coupler, jamming in the coupling process of the coupler, and the error of the drive motor An operation error of the drive motor may occur.

A first object to be solved by the present invention is to provide a washing machine capable of adjusting the arrangement of the coupler without continuous application of current to the solenoid in a structure for controlling the arrangement of the coupler by the operation of the solenoid.

A second object of the present invention is to provide a washing machine capable of solving a problem caused by an error in disposition of a coupler among errors related to a malfunction of a driving motor.

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

In order to achieve the above object, the control method of the washing machine according to the present invention operates a solenoid module so that a drive shaft rotating a pulsator and a dehydration shaft rotating a washing tub are shaft-joined or released, and the coupler is arranged. A mode change step of moving, operating a drive motor that rotates the drive shaft, and a mode check step of sensing a load amount of current output to the drive motor, wherein the mode check step includes: When the load does not satisfy the load set value, including a coupler setting step of operating the solenoid module to rearrange the position of the coupler, the arrangement of the coupler can be adjusted.

In the mode check step, the steps of sensing the amount of current output from the drive motor and determining whether the load amount of the voltage applied to the drive motor satisfies a load set value are repeatedly performed, and the When the load amount of the applied voltage does not satisfy the load set value, the error count is increased to increase the accuracy of whether an error occurs according to the arrangement of the coupler.

In the mode check step, when the error count corresponds to the first set value, the coupler setting step is performed to solve a problem that occurs when the arrangement of the coupler is inappropriate.

The coupler setting step may include a mode initialization step of operating the solenoid module so that the drive shaft and the dehydration shaft are disposed in a shaft joint state, thereby adjusting the arrangement of the coupler.

The coupler setting step is, after the mode initialization step, by operating the solenoid module to selectively perform a first mode change step of disposing the coupler so that the drive shaft and the dehydration shaft are in a shaft joint release state, You can adjust the layout.

In the mode initialization step, by operating the solenoid module so that the coupler moves below a set height, the coupler may be disposed in a state in which the drive shaft and the dehydration shaft are coupled to each other.

The mode initialization step includes operating the drive motor to rotate the drive shaft connected to the pulsator, and depending on the arrangement, the dehydration shaft connected to the inner tank is connected to the drive shaft or a solenoid module to generate attractive force to the coupler for releasing the shaft joint Including the step of operating, the coupler can be arranged in a state in which the drive shaft and the dehydration shaft are jointed.

The mode changing step includes a first mode changing step of moving the arrangement of the coupler so that the drive shaft and the dehydration shaft are released from the shaft joint, and a second mode changing step of moving the arrangement of the coupler so that the drive shaft and the dehydration shaft are shaft-joined Including a mode changing step, in the mode changing step, when performing the first mode changing step, the coupler setting step, after the mode initialization step, by performing the first mode changing step, the arrangement of the coupler It can be adjusted to a suitable arrangement for the mode change stage.

In the mode check step, after the coupler setting step, the drive motor that rotates the drive shaft is operated, the load amount of the current output to the drive motor is sensed, and after the coupler setting step, the voltage applied to the drive motor When the load does not satisfy the load setting value, the error count is increased to determine whether the motor itself has an error.

In the mode check step, when the error count corresponds to a second set value greater than the first set value, the motor error occurrence signal may be sent to inform the user of an error that cannot be overcome by changing the arrangement of the coupler. .

The mode changing step includes a first mode changing step of moving the arrangement of the coupler so that the drive shaft and the dehydration shaft are released from the shaft joint, and a second mode changing step of moving the arrangement of the coupler so that the drive shaft and the dehydration shaft are shaft-joined a mode changing step, wherein the mode checking step includes, in the mode changing step, when the first mode changing step is performed, and when the error count corresponds to the second set value, a fabric unwinding operation is performed, It is possible to solve the error problem caused by the aggregation of the fabric, not the error of the motor itself.

In the mode check step, when the load amount of the voltage applied to the driving motor does not satisfy the load set value after the unwinding stroke, the motor error occurrence signal is sent to the user to solve an error that cannot be overcome by the unwinding stroke. can inform

When the load value of the current output from the driving motor satisfies the load set value, including a mode performing step of operating the driving motor, if a separate error is not detected in the motor, a washing cycle or a spin-drying cycle is performed can

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

According to the washing machine of the present invention, there are one or more of the following effects.

First, when the coupler moves upward in the longitudinal direction of the dehydration shaft, it is possible to fix the position of the coupler moved upward by the solenoid module, including a coupler guider that rotates or fixes the position of the coupler. Specifically, by having a structure in which a coupler moving in the vertical direction on the dehydration shaft is caught by a coupler guider moving in the circumferential direction on the dehydration shaft, the position of the coupler moved upward by the solenoid module can be fixed. For this reason, even if the operation of the solenoid module is not continuously performed, the position of the coupler that has moved upward can be fixed, thereby reducing power consumption and solving the problem of heat generation of the coil. In addition, the problem of abnormal operation of the solenoid module can be prevented in advance.

Second, when a load occurs that does not match the load amount of current required for the actual washing or dehydration operation, the coupler setting step adjusts the arrangement of the coupler to quickly overcome the problem caused by the arrangement error of the coupler. There are advantages. This has the advantage of reducing material costs because, during washing, the arrangement of the coupler can be grasped without a separate sensor, and the arrangement of the coupler can be adjusted again. That is, by initializing the arrangement of the coupler to the first position and grasping the arrangement of the coupler, there is an advantage in that laundry can be washed with the correct operation of the washing tub and the pearl shade.

Third, there is an advantage in that it is possible to quickly solve the error related to the malfunction of the motor that may occur by adjusting the arrangement of the coupler or when the cloth is agglomerated by unwinding.

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

1 is a schematic cross-sectional view of a washing machine including a driving assembly according to an embodiment of the present invention.
2 is a cross-sectional view of a driving assembly according to an embodiment of the present invention.
3 is an exploded perspective view of a part of a driving assembly according to an embodiment of the present invention.
4 is a perspective view of a rotor hub according to an embodiment of the present invention.
5 is a cross-sectional view of a bearing housing and a solenoid module according to an embodiment of the present invention.
FIG. 6 is an enlarged view of FIG. 5A .
7 is a cross-sectional perspective view of a bearing housing and a solenoid module according to an embodiment of the present invention.
8 is a perspective view of a coupler according to an embodiment of the present invention.
9 is a view for explaining the coupling relationship between the dehydration and the coupler guider according to an embodiment of the present invention.
10 is a cross-sectional view for explaining the coupling relationship between the dehydration and the coupler guider of the present invention.
Fig. 11 is an enlarged view of B of Fig. 9 .
12A is a cross-sectional view illustrating the arrangement of a coupler, a solenoid module, and a coupler guide in a state in which the coupler is coupled to the coupling flange according to an embodiment of the present invention.
12B is a cross-sectional view illustrating the arrangement of a coupler, a solenoid module, and a coupler guide in a state where the coupler is spaced apart from the coupling flange according to an embodiment of the present invention.
13A is a view for explaining the relationship between the coupler and the coupling flange, and the relationship between the coupler and the coupler guide, in a state where the coupler is coupled to the coupling flange according to an embodiment of the present invention.
13b is a view for explaining the relationship between the coupler and the coupling flange, and the relationship between the coupler and the coupler guide, in a state where the coupler according to an embodiment of the present invention is spaced apart from the coupling flange.
14a to 14d are, from a state in which the coupler is engaged with the coupling flange according to an embodiment of the present invention to a stopper of the coupler from the state in which the coupler is fixed to the upper side of the coupler guider, the guide member of the coupler, the guide projection of the coupler guider It is a drawing for explaining a relationship.
15A to 15D are, from a state in which the coupler is fixed to the upper side of the coupler guider according to an embodiment of the present invention to a stopper of the coupler from the state where the coupler is engaged with the coupling flange, the guide member of the coupler, the guide projection of the coupler guider It is a drawing for explaining a relationship.
16 is a block diagram illustrating a control unit and its related configuration according to an embodiment of the present invention.
17 is a flowchart illustrating a method for controlling a washing machine according to an embodiment of the present invention.
18 is a view for explaining the arrangement of the guide projection and the coupler according to the first position (P1), the second position (P2), and the third position (P3) of the coupler according to an embodiment of the present invention.
19 is a flowchart illustrating a mode initialization step according to another embodiment of the present invention.
20 is a diagram in which a mode initialization step according to another embodiment of the present invention is embodied as a time table.
21 is a flowchart illustrating a control method of a washing machine for error detection according to an embodiment of the present invention.
22 is a flowchart detailing the mode check step according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining a washing machine according to embodiments of the present invention.

<Entire configuration>

Hereinafter, the overall structure of the washing machine will be briefly described with reference to FIG. 1 .

The washing machine according to an embodiment of the present invention may include a casing 11 that forms an exterior and forms a space in which the water storage tank 12 is accommodated. The casing 11 may include a cabinet 111 having an open upper surface, and a top cover 112 coupled to the open upper surface of the cabinet 111 and having an inlet into which laundry is put in an approximately central portion. A door (not shown) for opening and closing the inlet may be rotatably coupled to the top cover 112 .

A suspension 18 for suspending the water tank 12 in the casing 11 may be provided. The suspension 18 has an upper end connected to the top cover 112 , and a lower end connected to the water storage tank 12 , and may be provided at four corners in the casing 11 , respectively.

The control panel 141 may be provided on the top cover 112 . The control panel 141 includes an input unit (eg, a button, a dial, a touch pad, etc.) that receives various control commands for operation control of the washing machine from the user, and a display unit (eg, a display unit that visually displays the operating state of the washing machine). , LCD, LED display, etc.) may be provided.

A water supply pipe 161 for guiding water supplied from an external water source, such as a faucet, and a water supply valve 162 for controlling the water supply pipe 161 may be provided. The water supply valve 162 may be controlled by the controller 142 . The controller 142 may control the overall operation of the washing machine as well as the water supply valve 162 . The controller 142 may include a microprocessor having a memory for data storage. Hereinafter, unless otherwise specified, it will be understood that the control of the electric/electronic components constituting the washing machine is performed by the controller 142 .

The drawer 151 containing the detergent may be retractably accommodated in the drawer housing 152 . After the water supplied through the water supply valve 162 is mixed with the detergent while passing through the drawer 151 , it is discharged into the water storage tub 12 or the washing tub 13 . A discharge pipe 172 for discharging water from the water storage tank 12 and a drain valve 171 for controlling the discharge pipe 172 may be provided. Water discharged through the discharge pipe 172 may be pumped by the drainage pump 173 and discharged to the outside of the washing machine through the drainage pipe 174 .

The washing tub 13 accommodates laundry and is rotated about a vertical axis in the water storage tub 12 . A pulsator 13a is rotatably provided in the washing tub 13 .

The washing tub 13 and the pulsator 13a may be rotated by the driving assembly 2 . The driving assembly 2 may rotate only the pulsator 13a or simultaneously rotate the washing tub 13 and the pulsator 13a. The pulsator 13a is connected to the drive shaft 22 of the drive assembly 2 and rotates. The washing tub 13 is connected to the dewatering shaft 25 of the driving assembly 2 and rotates.

<Drive assembly>

Hereinafter, a driving assembly according to an embodiment of the present invention will be described with reference to FIGS. 2 to 13B .

The driving assembly 2 rotates the pulsator 13a or the washing tub 13 . The drive assembly 2 rotates with the rotation of the drive motor 21 rotating by electromagnetic force, the drive motor 21, and the drive shaft 22 which rotates the pulsator, rotates on the same axis as the drive shaft 22, and the washing tub When the dehydration shaft 25 connected to 13, the solenoid module 27 that generates a magnetic field by applying a current to the coil 2712, and the solenoid module 27 generates a magnetic field, the position is changed, A coupler guider that maintains a state in which the coupler 28, which releases the shaft joint or the shaft joint between the driving shaft 22 and the dewatering shaft 25, and the coupler 28, the drive shaft 22 and the dewatering shaft 25 are released from the shaft joint (29).

Here, the shaft joint between the drive shaft 22 and the dewatering shaft 25 is a coupling flange in which a plurality of shaft joint teeth 2824a and a shaft joint groove 2824b formed at the lower end of the coupler 28 are connected to the drive shaft 22 A plurality of tooth grooves 21232c and teeth 21232d of 21232 are arranged to engage, meaning that the drive shaft 22 and the dewatering shaft 25 are driven together.

In addition, the shaft joint release of the drive shaft 22 and the dewatering shaft 25 means that the lower end of the coupler 28 is spaced apart from the coupling flange 21232 upward by a predetermined interval, and the drive shaft 22 is connected to the drive motor 21 . It means that even if driven by the dehydration (25), it does not affect.

The driving motor 21 may be an outer rotor type brushless direct current (BLDC) motor. Specifically, the driving motor 21 may include a stator 211 in which a stator coil 2112 is wound around a stator core 2111, and a rotor 212 that is rotated by electromagnetic force acting between the stator 211. have. The rotor 212 includes a rotor frame 2122 for fixing a plurality of permanent magnets 2121 spaced apart in the circumferential direction, and a rotor hub 2123 for connecting the central portion of the rotor frame 2122 with the driving shaft 22. can do.

The type of the driving motor 21 is not limited thereto. For example, the drive motor may be an inner rotor type, and an AC motor such as an induction motor or a shaded pole motor may also be used. In addition, various known types of motors may be used. can be made with

The rotor hub 2123 may include a rotor bush 21231 coupled to the drive shaft 22 , and a coupling flange 21232 coupling the rotor bush 21231 to the center of the rotor frame 2122 . The coupling flange 21232 extends outwardly from the tubular flange body 21232a and the flange body 21232a into which the rotor bush 21231 is inserted, and is coupled to the rotor frame 2122 by fastening members such as screws or bolts. It may include a flange portion 21232b that is. On the inner circumferential surface of the flange body portion 21232a, a meshing groove 21232c and teeth 21232d engaged with a coupler 28 to be described later may be formed to cross each other.

The rotor bush 21231 may be made of a metal material (preferably, stainless steel, but not necessarily limited thereto). The rotor bush 21231 is coupled to the drive shaft 22 , and preferably, the inner circumferential surface of the rotor bush 21231 may be spline coupled to the outer circumferential surface of the drive shaft 22 .

Here, the spline coupling means that a spline such as a tooth or a key extending in the axial direction is formed on any one of the drive shaft 22 and the rotor bush 21231, and a groove engaged with the spline is formed on the other one. This means that the spline and the groove are engaged, and when the rotor bush 21231 is rotated by this engagement, the drive shaft 22 is also rotated.

The coupling flange 21232 is made of a synthetic resin material, and is interposed between the rotor bushing 21231 and the rotor frame 2122 to insulate the magnetic flux from being transmitted from the rotor frame 2122 to the rotor bushing 21231. can

By injecting a synthetic resin in a state in which the rotor bush 21231 is inserted into the mold to form the coupling flange 21232, the rotor bush 21231 and the coupling flange 21232 can be integrally formed.

The drive shaft 22 is coupled to the rotor bush 21231 and rotates. The drive shaft 22 rotates the pulsator 13a via the pulsator shaft 23 . The driving shaft 22 may be directly or indirectly connected to the pulsator shaft 23 .

The drive assembly 2 is connected to the pulsator 13a, receives the rotational force of the pulsator shaft 23 and the drive shaft 22 to rotate the pulsator 13a, and the speed according to the rotation of the drive shaft 22 It may include a gear module 24 for rotating the pulsator shaft 23 by converting the output according to the ratio or torque ratio.

However, depending on the embodiment, the gear module is omitted, it is also possible that the drive shaft 22 is directly connected to the pulsator (13a).

The gear module 24 is connected to the driving shaft 22 and is engaged with the rotating sun gear 241 and the sun gear 241, and rotates while rotating along the outer peripheral surface of the sun gear 241. A plurality of planetary gears 242, a plurality of A ring gear 243 meshing with the planetary gear 242 of the rotating shaft 243, a plurality of planetary gears 242 each providing a rotation axis, and a carrier 244 rotating together when the planetary gears 242 revolve. do.

The sun gear 241 is connected to the drive shaft 22 and rotates integrally with the drive shaft 22 . In the embodiment, the sun gear 241 is a helical gear, and correspondingly, the planetary gear 242 and the ring gear 243 are also configured to have helical gear-shaped teeth, but it is not necessarily limited thereto. For example, the sun gear 241 may be formed of a spur gear, and the planetary gear 242 and the ring gear 243 may also have teeth in the form of spur gears.

The ring gear 243 may be fixed to the inner circumferential surface of the gear housing 253 . That is, the ring gear 243 is rotated integrally with the gear housing 253 . The ring gear 243 has teeth formed on the inner circumferential surface defining the ring-shaped opening.

The planetary gear 242 is interposed between the sun gear 241 and the ring gear 243 , and meshes with the sun gear 241 and the ring gear 243 . A plurality of planetary gears 242 may be disposed along the circumference of the sun gear 241 , and each planetary gear 242 is rotatably supported by a carrier 244 . The planetary gear 242 may be made of acetal resin (POM).

The carrier 244 is coupled to the pulsator shaft 23 (shaft joint). The carrier 244 is a kind of link connecting the planetary gear 242 and the pulsator shaft 23 . That is, as the planetary gear 242 revolves around the sun gear 241 , the carrier 244 rotates, and the pulsator shaft 23 rotates accordingly.

The gear module 24 rotates the pulsator shaft 23 by converting the torque input through the drive shaft 22 according to a predetermined gear ratio. The gear ratio may be determined according to the number of teeth of the sun gear 241 , the planetary gear 242 , and the ring gear 243 .

The dehydration shaft 25 is spline coupled with the coupler 28, and the lower dewatering shaft 251 rotates together with the coupler 28, and is connected to the washing tub 13, and the upper dewatering shaft rotates the washing tub 13 ( 252), and a gear housing 253 disposed between the lower de-shrinkage 251 and the upper de-shrinkage 252, and the gear module 24 being disposed therein.

The lower de-shrink 251 is disposed on the upper side of the rotor bush (21231). The lower dehydration contraction 251 may be connected to the driving motor 21 through a coupler 28 . When the coupler 28 is shaft-joined to the coupling flange 21232 , the rotational force of the driving motor 21 may be transmitted to the dehydration shaft 25 .

A drive shaft hole 251a through which the drive shaft 22 passes is formed inside the lower dehydration shaft 251 . Between the lower dewatering shaft 251 and the drive shaft 22, a drive shaft bearing 262 is disposed, so that the lower dewatering shaft 251 and the drive shaft 22 can rotate separately.

The outer peripheral surface of the lower de-shrink 251 is spline-coupled with the inner peripheral surface of the coupler 28 . The coupler 28 may be moved in the axial direction of the lower dehydration shaft 251 in a state in which rotation with respect to the lower dehydration shaft 251 is constrained.

A spline structure to which the coupler 28 is spline-coupled is formed in the lower portion 2511 of the lower de-shrinkage 251 . The upper portion 2512 of the lower dehydration shaft 251 may have a smooth shape in which the coupler guider 29 is rotatably mounted. A coupler guider 29 to be described below is mounted around the upper portion 2512 of the lower dehydration 251 . The inner circumferential diameter (ID2) of the coupler guider 29 is formed to be longer than the outer circumferential diameter (OD2) of the lower dehydration shaft 251 , and is rotatably mounted around the lower dehydration shaft 251 .

However, the coupler guider 29, the lower movement is limited by the fixing ring 293 fixedly disposed on the outer periphery of the lower de-shrinkage 251, and the lower de-shrinkage 251 to support the lower de-shrinkage 251. The upper movement is restricted by the de-axial bearing 261 disposed on the upper part 2512 .

On the outer periphery of the lower dewatering shaft 251, a fixing ring groove 2513 recessed inward along the radial direction is formed so that the fixing ring 293 is mounted.

The upper de-shrink 252 is connected to the washing tub 13, and a pulsator shaft hole 252a through which the pulsator shaft 23 passes is formed inside. Between the upper dewatering shaft 252 and the pulsator shaft 23, a pulsator shaft bearing 263 is disposed, and the upper dehydration shaft 252 and the pulsator shaft 23 are each freely rotated separately. have.

The upper de-shrink 252 may be made of a ferromagnetic material. The upper de-shrink 252 may be connected to the washing tub 13 by the hub base 131 . The hub base 131 is coupled to the lower end of the washing tub 13 , and a fastener through which the upper de-shrink 252 passes is formed in the center of the hub base 131 . The upper dewatering shaft 252 is spline-coupled to the inner peripheral surface of the fastener, and when the upper dewatering shaft 252 rotates, the hub base 131 is rotated together. A nut (not shown) for binding may be fastened to the upper end 2521 of the upper de-shrink 252 passing through the hub base 131 so that the de-shrink 25 is not separated from the hub base 131 .

The gear housing 253 forms a space in which the gear module 24 is disposed, is coupled to the upper de-shrinkage 252 upwardly, and is connected to the lower de-shrinkage shaft 251 downwardly. The gear housing 253 may include a lower gear housing 2532 and an upper gear housing 2531 .

The lower gear housing 2532 and the upper gear housing 2531 are coupled to each other by fastening members such as screws or bolts. The lower gear housing 2532 has a hole through which the drive shaft 22 passes in the center, has a disk shape, and is fastened to the upper gear housing 2531 disposed on the upper side. The lower de-shrinkage 251 is extended to the lower side of the lower gear housing 2532 , and the lower gear housing 2532 may be integrally formed with the lower de-shrinkage 251 .

The upper gear housing 2531 has a boss 25311 coupled to the upper de-shrink 252 , and the upper side of the space in which the gear module 24 is accommodated is opened by the boss 25311 . The upper gear housing 2531 includes a housing body 25312 forming an inner circumferential surface surrounding the ring gear 243 and a radially outward extension from the open lower side of the housing body 25312, the lower gear housing 253 ) and an upper flange 25113 coupled with. The boss 25311 extends upward from the housing body 25312 .

The driving assembly 2 may further include a bearing housing 264 disposed below the water storage tank 12 and supporting the dewatering shaft 25 .

The bearing housing 264 forms a space in which the dehydration shaft 25 is rotatably disposed. The bearing housing 264 may be coupled to the bottom surface of the water storage tank 12 . The bearing housing 264 may be made of a ferromagnetic material. The bearing housing 264 includes an upper bearing housing 2641 coupled to the bottom surface of the water storage tank 12, and a lower bearing housing 2642 coupled to the upper bearing housing 2641 from the lower side of the upper bearing housing 2641. include The dewatering shaft 25 is disposed in the inner space where the upper bearing housing 2641 and the lower bearing housing 2642 are combined.

Between the bearing housing 264 and the dewatering shaft 25, the dewatering shaft bearing 261 is disposed so that the dehydrating shaft 25 is rotatably supported. A first de-shrink bearing 261a is disposed between the upper bearing housing 2641 and the upper de-shrink 252, and a second de-shrink bearing 261b between the lower bearing housing 2642 and the lower de-shrink 251. this is placed

The lower bearing housing 2642 has a convex shape in the lower direction, and includes a lower insertion portion 2643 inserted into the bearing housing mounting portion 27313 of the solenoid housing 273 to be described below. The lower insertion part 2643 is inserted into the bearing housing mounting part 27313 to facilitate fastening between the bearing housing 264 and the solenoid housing 273 .

<Solenoid module>

The solenoid module 27, when a current is applied, forms a magnetic field to move the coupler 28 upward. The solenoid module 27 may be fixedly disposed below the bearing housing 264 . The solenoid module 27 includes a solenoid 271 that forms a magnetic field when a current is applied, a fixed core 272 surrounding one side of the circumference of the solenoid 271, and a solenoid 271 from the lower side of the bearing housing 264 It includes a solenoid housing 273 for fixed placement.

The solenoid housing 273 is fixedly disposed below the bearing housing 264 . The solenoid housing 273 may be fixed to the lower side of the bearing housing 264 through a separate fastening member.

The solenoid housing 273 may have a substantially disk shape, and a dehydration/contraction hole 2731a through which the dehydration axis 25 passes may be formed in the center. The inner circumferential surface of the solenoid housing 273 in which the dehydration hole 2731a is formed is spaced apart from the dehydration contraction 25 . A solenoid 271 is fixedly disposed on the inner circumferential surface of the solenoid housing 273 .

The solenoid housing 273 may be fixedly disposed on the bearing housing 264 disposed on the upper side through a separate fastening member (not shown). The solenoid housing 273 may include an upper solenoid housing 2731 to which the bearing housing 264 is fastened, and a lower solenoid housing 2732 coupled to the upper solenoid housing 2731 from the lower side of the upper solenoid housing 2731. have.

The upper solenoid housing 2731 has a dehydration and contraction hole 2731a formed at the center thereof, and a fixing plate 27311 having a disk shape and a fixing plate 27311 are fastened to the bearing housing 264, a fastening hole (not shown) is provided. The formed bearing housing fastening portion 27312, a bearing housing mounting portion formed so as to protrude upward at a position spaced apart from the inner peripheral end of the fixed plate 27311 by a predetermined distance in the radial direction, and the lower insertion portion 2643 of the bearing housing 264 is inserted. 27313 and a fixed core fixing portion 27314 protruding downward at a position spaced apart from the inner peripheral end of the fixing plate 27311 by a predetermined distance in the radial direction, and formed so that the fixing core 272 is inserted.

The fixed plate 27311 has a substantially disk-shaped table, and at the center, a dehydration/contraction hole 2731a through which the dehydration/shrink 25 passes is formed. The diameter 2731aD of the dehydration hole 2731a is formed to be larger than the diameter of the outer circumferential surface of the dehydration shaft 25 positioned in the dehydration hole 2731a. Therefore, when the dehydration shaft 25 rotates, it does not interfere with the solenoid housing 273 . Between the de-contraction 25 and the de-contraction hole 2731a, when the coupler 28 moves upward, a space is formed in which the coupler 28 and some components of the moving core 281 are disposed.

A hook hole 27311b through which the hook 27112a of the bobbin 2711 passes is formed in the fixing plate 27311 . The fixing plate 27311 has a fastening hole 27311a fastened to the lower solenoid housing 2732 by a separate fastening means.

The bearing housing mounting portion 27313 vertically protrudes upward from the fixing plate 27311 . The bearing housing mounting part 27313 may have a ring shape in which the lower insertion part 2643 of the bearing housing 264 is inserted downward. The fixed core fixing part 27314 vertically protrudes downward from the fixing plate 27311 . The fixed core fixing part 27314 has a ring shape into which the fixed core 272 is inserted upward. The fixed core 272 is inserted in close contact with the inner circumferential surface of the fixed core fixing part 27314 . A lower solenoid housing 2732 is mounted on the outer peripheral surface of the fixed core fixing part 27314 .

The lower solenoid housing 2732 is mounted on the lower surface of the upper solenoid housing 2731 . The lower solenoid housing 2732 may be fastened to the upper solenoid housing 2731 by a separate fastening means (not shown). A fastening hole 2732a into which a separate fastening means is inserted is formed in the lower solenoid housing 2732 .

The lower solenoid housing 2732 includes an upper surface portion 27321 that interfaces with the upper solenoid housing 2731, a circumferential surface portion 27322 that vertically protrudes downward from the inner peripheral end of the upper surface portion 27321, and a circumferential surface portion 27322 of It includes a protrusion 27323 bent vertically from the lower end in the center direction.

The upper surface portion 27321 is fastened to the upper solenoid housing 2731 , and a fastening hole 2732a is formed. The circumferential surface portion 27322 faces the outer circumferential surface of the fixed core fixing portion 27314 of the upper solenoid housing 2731 , extends downward, and surrounds the lower circumferential surface of the fixed core 272 . The protrusion 27323 is disposed to support the lower end 27214 of the fixed core 272 , and restricts the downward movement of the fixed core 272 .

The upper solenoid housing 2731 and the lower solenoid housing 2732 may be integrally configured.

The solenoid 271 has a coil wound around the dehydration shaft 25 . The solenoid 271 may include a bobbin 2711 and a coil 2712 wound around the bobbin 2711 . A hollow is formed in the bobbin 2711 through which the dehydration contraction 25 passes, and a coil 2712 is wound around the outer periphery of the bobbin 2711 .

The coil 2712 may be wrapped with a flame-retardant resin. The bobbin 2711 includes a cylindrical bobbin body part 27111 around which a coil 2712 is wound, an upper plate part 27112 extending outward from the upper end of the bobbin body part 27111, and an outer side from the lower end of the bobbin body part 27111. It may include a lower plate portion 27113 extended to.

The bobbin 2711 includes a hook 27112a protruding upward from the upper plate portion 27112 . The hook 27112a may pass through the hook hole 27311b of the solenoid housing 273 and be fixedly disposed in the solenoid housing 273 . The hook 27112a passes through the hook hole 2723a formed in the fixed core 272 and passes through the hook hole 27311b of the solenoid housing 273 and is fixed to the hook hole 27311b of the solenoid housing 273 . Thus, both the solenoid 271 and the fixed core 272 can be fixed to the solenoid housing 273 .

The bobbin body portion 27111 may be disposed to face the outer circumferential surface of the inner fixed core 2722 of the fixed core 272 . The bobbin body 27111 may be press-fitted to the outer peripheral surface of the inner fixed core 2722 to be fixedly disposed on the fixed core 272 .

The upper plate portion 27112 and the lower plate portion 27113 extend radially from the bobbin body portion 27111 . The length 27112L of the upper plate 27112 radially extending from the bobbin body 27111 is longer than the length 27113L of the lower plate 27113 radially extending from the bobbin body 27111.

The fixed core 272 has a structure surrounding the circumference of the solenoid 271 . The fixed core 272 forms a magnetic path through which the magnetic field generated by the solenoid passes. The fixed core 272 has a hollow inside and a ring shape with an open lower side. The moving core 281 may move to an open lower side of the fixed core 272 .

The fixed core 272 forms an outer circumferential surface and forms an outer fixed core 2721 coupled to the solenoid housing 273, an inner circumferential surface, and an inner fixed core 2722 coupled to the solenoid 271, It includes a connection fixed core 2723 connecting the upper ends of the outer fixed core 2721 and the inner fixed core 2722 .

The outer fixed core 2721 is mounted on the fixed core fixing portion 27314 of the upper solenoid housing 2731 and the peripheral surface portion 27322 of the lower solenoid housing 2732 . The outer fixed core 2721 is disposed to face the fixed core fixing portion 27314 of the upper solenoid housing 2731 and the peripheral surface portion 27322 of the lower solenoid housing 2732 . The outer fixed core 2721 includes an upper outer fixed core 27211 that interfaces with the fixed core fixed portion 27314, and a lower outer fixed core 27212 that interfaces with the circumferential surface portion 27322 of the lower solenoid housing 2732 and , and an extension portion 27213 connecting the upper outer fixed core 27211 and the lower outer fixed core 27212 . Through the extension 27213 , the radius of the lower outer fixed core 27212 may be increased, and the lower outer fixed core 27212 may be disposed to face the lower solenoid housing 2732 .

The lower end 27214 of the outer fixed core 2721 is fixedly disposed in contact with the protrusion 27323 of the lower solenoid housing 2732 .

The inner fixed core 2722 is spaced apart from the outer fixed core 2721 by a predetermined distance. A space in which the bobbin 2711 is disposed and a space in which the outer moving core 2812 is disposed are formed between the inner fixed core 2722 and the outer fixed core 2721 .

The inner fixed core 2722 is disposed in contact with the bobbin body portion 27111 of the bobbin 2711 . The bobbin 2711 is press-fitted to the inner fixed core 2722, and is disposed to be face-to-face.

The connection fixing core 2723 is disposed to face the fixing plate 27311 . The connection fixed core 2723 connects the inner fixed core 2722 and the upper end of the outer fixed core 2721 . In the connection fixed core 2723 , a hook hole 2723a through which the hook 27112a passes is formed at a portion where the hook 27112a of the bobbin 2711 is formed.

The length 2721L of the outer fixed core 2721 extending downwardly from the connecting fixed core 2723 is longer than the length 2722L of the inner fixed core 2722 extending downward from the connecting fixed core 2723 is formed in

<coupler>

The coupler 28 is mounted movably in the vertical direction on the lower dewatering shaft 251 , and may axially connect the drive shaft 22 and the dewatering shaft 25 or release the axial joint. The coupler 28 is provided so as to be able to move up and down along the dehydration contraction 25 from the lower side of the solenoid 271 . The coupler 28 is spline-coupled with the lower de-shrinkage 251, and can move the lower de-shrinkage 251 in the vertical direction.

The coupler 28 forms a magnetic path of the magnetic flux formed by the solenoid 271 , and when a current is applied to the solenoid 271 , the moving core 281 rises, and the moving core 281 is removed by the moving core 281 . The contraction 25 moves in the vertical direction, and the drive shaft 22 and the dehydration shaft 25 are shaft-joined or disposed to protrude on the circumferential surface of the coupler body 282 and the coupler body 282 for releasing the shaft coupling, the coupler It includes a guide member 283 for adjusting the position of (28).

The moving core 281 is mounted on the outer periphery of the coupler body 282 to move the coupler body 282 upward. The moving core 281 is fixed to the coupler body 282 and can move together with the coupler body 282 . The moving core 281 moves the coupler body 282 upward when a current is applied to the solenoid 271 . When no current is applied to the solenoid 271, the coupler body 282 and the moving core 281 move downward by gravity.

The moving core 281 may rise by electromagnetic interaction with the solenoid 271 . The moving core 281 can form the coupler body 282 by injecting synthetic resin in a state in which the moving core 281 is inserted in the mold, thereby integrally forming the coupler body 282 and the moving core 281. .

The moving core 281 forms an inner circumferential surface and forms an inner moving core 2811 coupled with the coupler body 282, an outer circumferential surface, and is radially spaced apart from the inner moving core 2811 by a predetermined distance. It includes an outer moving core 2812 , a connecting moving core 2813 connecting the lower ends of the inner moving core 2811 and the outer moving core 2812 .

A height 2811L at which the inner moving core 2811 extends upward from the connecting moving core 2813 is greater than a height 2812L at which the outer moving core 2812 extends upward from the connecting moving core 2813. . The distance 2813L between the inner moving core 2811 and the outer moving core 2812 is greater than the sum of the thickness of the inner fixed core 2722 and the length 27113L of the lower plate portion 27113 of the bobbin 2711. formed large. Accordingly, when the moving core 281 moves upward along the dehydration shaft 25 , the bobbin 2711 and the inner fixed core 2722 may be disposed in the inner space formed by the moving core 281 .

The diameter 2811OD of the outer circumferential surface formed by the inner moving core 2811 is smaller than the diameter 2722ID of the inner circumferential surface formed by the inner fixed core 2722 . A diameter 2812D of the outer moving core 2812 having a ring shape is smaller than a diameter 2721D of the outer fixed core 2721 and larger than a diameter 2722D of the inner fixed core 2722 .

The coupler body 282 is formed in a cylindrical shape as a whole, and the de-contraction insertion hole 282a into which the de-contraction 25 is inserted is formed in the center. The coupler body 282 may be made of a synthetic resin material, but is not necessarily limited thereto, and may be made of a metal (eg, a ferromagnetic material).

The coupler body 282, the coupler body 282 is fixed in the circumferential direction of the dehydration shaft 25, so that the longitudinal movement of the dehydration shaft 25 is possible, the coupler body 282 is removed from the inner circumferential surface. and de-shrinking guides 2822a and 2822b having a structure engaged with the outer periphery of the shrinkage 25 .

The dehydration axis movement guides (2822a, 2822b) are spline-coupled with the outer circumferential surface of the dehydration shaft 25 on the inner circumferential surface defining the dehydration shaft insertion hole 282a, so that rotation of the coupler with respect to the dehydration shaft 25 is restricted. It can be moved in the vertical direction of the axis. The dehydration movement guides 2822a and 2822b, on the inner circumferential surface of the coupler body 282, a plurality of spline teeth 2822a and spline grooves 2822b engaged with the outer circumferential surface of the dehydration shrinkage 25 may be formed.

A stopper 2823 forming an inclined surface in contact with the guide protrusion 292 of the coupler guider 29 to be described below may be formed on the inner circumferential surface 2821 of the coupler body 282 . A plurality of stoppers 2823 are disposed along the inner circumferential surface of the coupler body 282 .

The stopper 2823 is disposed above the spline tooth 2822a and the spline groove 2822b formed on the inner circumferential surface 2821 of the coupler body 282 .

The stopper 2823 has an inclined surface on the inner circumferential surface 2821 of the coupler body 282, and is disposed on one side of the formed first stopper 28231 and the first stopper 28231, and is higher than the first stopper 28231. It includes a second stopper 28232 having a small height and size.

The first stopper 28231 and the second stopper 28232 have the same inclination angle and form an inclined surface. The first stopper 28231 and the second stopper 28232 are disposed on the inner circumferential surface of the coupler body 282 in the same number. The first stopper 28231 and the second stopper 28232 are alternately disposed on the inner circumferential surface of the coupler body 282 . The second stoppers 28232 are disposed at both ends of the first stopper 28231 , and the first stoppers 28231 are disposed at both ends of the second stopper 28232 .

The first stopper 28231 includes a first stopper inclined surface 28231a and a first stopper vertical surface 28231b that is bent downwardly and extends from the upper end of the first stopper inclined surface 28231a. The second stopper 28232 includes a second stopper inclined surface 28232a and a second stopper vertical surface 28232b that is bent downwardly and extends from the upper end of the second stopper inclined surface 28232a.

The length of each of the first stopper inclined surface 28231a and the first stopper vertical surface 28231b formed on the first stopper 28231 is the second stopper inclined surface 28232a and the second stopper vertical surface formed on the second stopper 28232 , respectively. (28232b) is formed longer than each length. Since the first stopper 28231 and the second stopper 28232 have the same inclination angle, the first stopper 28231 has a longer length than the second stopper 28232 on the inner circumferential surface of the coupler body 282, 2 It protrudes higher than the stopper 28232 .

A guide member 283 is disposed at the upper end of the coupler body 282 . The guide member 283, both ends protrude to the inside of the coupler body 282, the coupler 28 can be seated in the engaging groove 29224 of the coupler guider (29).

The guide member 283 has a semicircular shape, and is bent in the center direction of the coupler 28 at both ends of the circumferential mounting portion 2831 mounted on the outer periphery of the coupler body 282, the circumferential mounting portion 2831, the coupler body 282 includes engaging portions 2832a and 2832b protruding inward. The engaging portions 2832a and 2832b of the guide member 283 are seated in the engaging groove 29224 of the coupler guider 29 when the coupler 28 moves upward, and the coupling flange 21232 and the spaced coupler ( 28) can be fixed.

The circumferential mounting portion 2831 has a semi-ring shape and may be fixedly disposed on the outer periphery of the coupler body 282 . A guide member groove 2825 to which the circumferential mounting portion 2831 is mounted is formed on the outer periphery of the coupler 28 .

The engaging portions 2832a and 2832b of the guide member 283 move along the guide hole 294 between the plurality of guide protrusions 292 disposed on the coupler guider 29, or the engaging groove of the coupler guider 29. It can be seated at (29224).

The locking portions 2832a and 2832b are disposed above the first stopper 28231 . The engaging portions 2832a and 2832b are disposed above the first stopper 28231 adjacent to the lower end of the first stopper 28231 than the upper end of the first stopper 28231 .

The coupler body 282 is disposed at the lower end of the outer circumferential surface of the coupler body 282 , and when in contact with the driving motor 21 , the driving force transmitting units 2824a and 2824b that receive the rotational force of the driving motor 21 . ) is included.

The driving force transmission units 2824a and 2824b may be provided with a plurality of teeth 21232d and tooth grooves 21232c of the coupling flange 21232, and a plurality of shaft coupling teeth 2824a and shaft coupling grooves 2824b may be formed. . The coupler body 282 is a plurality of shaft joint teeth 2824a and shaft of the coupler body 282 in the tooth 21232d and tooth groove 21232c of the coupling flange 21232 when the coupling flange 21232 and the shaft are connected. The joint grooves 2824b are engaged. Coupler body 282, when the coupling flange 21232 and the shaft joint is released, a plurality of shaft joint teeth 2824a and shaft joint groove 2824b of the coupler body 282 are teeth 21232d of the coupling flange 21232 ) and the tooth grooves 21232c are spaced apart from each other by a predetermined distance. Coupler body 282 is, when the guide member 283 is disposed on the lower side of the guide protrusion 292, the coupling flange 21232 and the shaft joint, the guide member 283 is the engaging groove of the guide protrusion 292 ( 29224), when the position is fixed, the coupling flange 21232 and the shaft joint is released.

<Couple Guider>

The coupler guider 29 is rotatably disposed on the upper side of the dehydration shaft 25, so that the coupler 28 maintains the shaft joint release state. The coupler guider 29 is disposed on the upper side of the spline structure of the lower de-shrink 251 . The coupler guider 29 is rotatably disposed at an approximately constant height with respect to the dehydration shaft 25 .

The coupler guider 29 is limited in vertical movement by the fixed ring 293 disposed on the lower side, and the de-contraction bearing 261 disposed on the upper side. The coupler guider 29 rotates when it comes into contact with the guide member 283 or the stopper 2823 of the coupler 28 .

The coupler guider 29 has a ring shape and is disposed on the outer periphery of the coupler guider body 291, the coupler guider body 291, which is disposed on the outer periphery of the dehydration contraction 25, and is in contact with the coupler 28. When rotating or includes a plurality of guide projections 292 for fixing the position of the coupler (28).

The guide protrusion 292 is in contact with the stopper 2823 to limit the upward movement of the coupler 28, or in contact with the guide member 283, the coupler 28 moving upward along the dehydration shaft 25. position can be fixed.

The guide protrusion 292 includes a first locking protrusion 292a guiding the locking portions 2832a and 2832b positioned on the upper side to the locking groove 29224, and the locking parts 2832a and 2832b positioned on the upper side of the guide hole. It includes a second locking jaw (292b) for guiding to (294).

When the engaging portions 2832a and 2832b moved upward through the guide hole 294 move upward by the rotation of the coupler guider 29, the first engaging projection 292a moves downward. to guide the engaging portions 2832a and 2832b to the engaging groove 29224. At this time, the engaging portion (2832a, 2832b) is caught in the engaging groove (29224), the coupler 28 is limited to the lower movement, it may be arranged on the upper side of the coupling flange (21232).

When the engaging portions 2832a and 2832b moved upwards of the engaging groove 29224 move upward by the rotation of the coupler guider 29, the second engaging projection 292b is engaged to move downward. The parts 2832a and 2832b are guided to the guide hole 294 . At this time, the engaging portions 2832a and 2832b pass through the guide hole 294 and move to the lower side of the coupler guider 29 , and the coupler 28 is disposed to engage the coupling flange 21232 .

The guide protrusion 292 includes a plurality of guide protrusions 292 spaced apart from each other along the outer circumference of the coupler guider body 291 . A guide hole 294 through which the guide member 283 moves is formed between the plurality of guide protrusions 292 . The guide hole 294 is formed between the first straight guide part 2923 and the second straight guide part 2924 of the guide protrusion 292 .

The guide protrusion 292 is in contact with the stopper 2823, and in contact with the lower surface guide part 2921 limiting the upper movement of the coupler 28, the guide member 283, and adjust the position of the coupler 28 A first straight guide portion 2923 connecting one end of the upper surface guide portion 2922, the lower end of which is in contact with the stopper 2823, and one end of the lower surface guide portion 2921 and one end of the upper surface guide portion 2922 , has a shorter length than the first straight guide part 2923, and includes a second straight guide part 2924 connecting the other end of the lower surface guide part 2921 and the other end of the upper surface guide part 2922. .

The lower surface guide portion 2921 forms an inclined surface corresponding to the stopper 2823 . The stopper 2823 is in contact with the lower surface guide portion 2921, moves upward, and is limited in movement by the first straight guide portion 2923, so that the upper movement of the coupler 28 is limited.

When the coupler 28 moves upward, the lower surface guide portion 2921 comes into contact with the stopper 2823 to rotate the coupler guide 29 . Accordingly, when the coupler 28 moves upward, the contact surface of the coupler guider 29 with which the guide member 283 comes into contact is changed.

The upper surface guide portion 2922 includes two inclined surfaces inclined in the opposite direction to the lower surface guide portion 2921 . The upper surface guide portion 2922 includes a first inclined surface 29221 inclined from the first straight guide portion 2923 toward the lower surface guide portion 2921, and from the end of the first inclined surface 29221 to the upper side. It includes a curved connecting straight portion 29223 extending vertically, and a second inclined surface 29222 formed to be inclined downward from the upper end of the connecting straight portion 29223 .

The guide member 283 may move in contact with the first inclined surface 29221 or the second inclined surface 29222 , and a position may be fixed between the first inclined surface 29221 and the connecting straight portion 29223 . When the guide member 283 moves along the first inclined surface 29221 , the movement of the guide member 283 is restricted between the first inclined surface 29221 and the connecting straight portion 29223 . When the guide member 283 moves along the second inclined surface 29222 , the guide member 283 passes through the guide hole 294 and moves downward.

The inclination angle formed by the first inclined surface 29221 with the virtual horizontal line (hereinafter, 'the inclination angle of the first inclined surface', ) is the inclination angle formed by the second inclined surface 29222 with the virtual horizontal line (hereinafter, 'of the second inclined surface'). angle of inclination'). Accordingly, the second straight guide portion 2924 is formed between the end of the second inclined surface 29222 and the end of the lower surface guide portion 2921 .

The length 2924L of the second straight guide part 2924 extending in the vertical direction is shorter than the length 2923L of the first straight guide part 2923 extending in the vertical direction. A length 2924L of the second straight guide portion 2924 may be formed to be substantially the same as the interval 294L of the guide hole 294 . The length 2924L of the second straight guide part 2924 is formed to be 90% to 110% of the gap 294L and the first straight guide part 2923 disposed adjacent to the second straight guide part 2924. .

The second straight guide part 2924 is a guide member 283 moving along the lower surface guide part 2921 due to the impact caused by the contact with the first straight guide part 2923, and the coupler guide part 29 rotates in reverse. it can be prevented

<Operation mode and arrangement of couplers according to mode change>

The washing machine according to the present invention is a first mode in which both the drive shaft 22 and the spin-drying shaft 25 are rotated when the drive motor 21 rotates when the drive shaft 22 and the spin-dry shaft 25 are shaft-joined. M1), the drive shaft 22 and the spin-drying shaft 25 are released from the shaft, and when the drive motor 21 rotates, the drive shaft 22 may operate in the second mode M2 in which it rotates together.

In the first mode (M1), the coupler 28 is disposed at a first position P1 in which the driving force transmission units 2824a and 2824b engage the plurality of teeth 21232d and the tooth groove 21232c of the coupling flange 21232. do. At the first position P1 of the coupler 28 , the drive shaft 22 and the dewatering shaft 25 are shaft-joined. When the coupler 28 is positioned at the first position P1 , the coupler 28 transmits the driving force of the driving motor 21 to the spin-drying shaft 25 . When the coupler 28 is positioned at the first position P1, the driving force transmitting portions 2824a and 2824b of the coupler 28 engage the plurality of teeth 21232d and the tooth groove 21232c of the coupling flange 21232. .

In the first position P1 of the coupler 28 , the guide member 283 is disposed below the coupler guider 29 . In the first position P1 of the coupler 28, the coupler 28 is fixed in position at the lower end in the longitudinal direction of the dehydration shaft 25 by gravity.

In the second mode M2, the coupler 28 is disposed at a second position P2 in which the engaging portions 2832a and 2832b of the guide member 283 are disposed above the engaging groove 29224 of the guide protrusion. At the second position P2 of the coupler 28 , the shaft coupling between the drive shaft 22 and the dewatering shaft 25 is released. When the coupler 28 is positioned at the second position P2 , the coupler 28 does not transmit the driving force of the driving motor 21 to the spin-drying shaft 25 . When the coupler 28 is positioned at the second position P2 , the driving force transmitting portions 2824a and 2824b of the coupler 28 are spaced apart from the coupling flange 21232 upwardly.

At the second position P2 of the coupler 28 , the guide member 283 is disposed above the engaging groove 29224 of the coupler guider 29 . At the second position P2 of the coupler 28 , the coupler 28 is fixed in a vertical position in the longitudinal direction of the dehydration shaft 25 on the upper side of the coupler guider 29 .

14A to 15D, as the solenoid module 27 operates, the positional movement of the coupler 28 will be described. 14A to 15D, guide projections 292a and 292b, engaging portions 2832a, 2832b, and first stoppers 28231x, 28231y, and 28231z disposed on the coupler guide 29 and the coupler 28 of an actual cylindrical shape are shown. and the second stoppers 28232x, 28232y, and 28232z are shown on a plane for convenience of description. The identification numbers of the guide projections 292a and 292b, the first stoppers 28231x, 28231y, and 28231z and the second stoppers 28232x, 28232y, and 28232z shown in FIGS. 14A to 15D are, in FIGS. 7 to 13B , There may be differences from the identification numbers of the guide projections 292a and 292b, the first stoppers 28231x, 28231y, and 28231z, and the second stoppers 28232x, 28232y, and 28232z, but this is a different number for convenience of description. It corresponds to the same configuration.

First, a process of changing from the first mode M1 to the second mode M2 according to the operation of the solenoid module 27 will be described with reference to FIGS. 14A to 14D . That is, a process in which the coupler 28 moves the dewatering shaft 25 and the driving shaft 22 from the shaft joint state to the shaft joint release state will be described. This may be the first mode changing step after the mode initialization step in the control method of the washing machine to be described below.

14a shows the stoppers 28231x, 28232x, 28231y, 28232y, 28231z, and 28232z, the guide member 283 and the guide projections 292a and 292b in a state where the coupler 28 is disposed at the first position P1. The deployed state is shown.

Since the stopper and the engaging portions 2832a and 2832b of the guide member are fixed to the coupler 28, the first stopper 28231x, 28231y, 28231z and the second stopper 28232x, 28232y, 28232z are points between the The distance D1 between the lower end portion 2823d of the stopper and the locking portions 2832a and 2832b is maintained constant.

In a state where the coupler 28 is disposed in the first position P1, the gap HP1 between the lower end 2823d of the stopper and the lower end 292D of the guide protrusions 292a and 292b is the lower end 2823d of the stopper. It is formed longer than the interval (D1) between the and the engaging portions (2832a, 2832b).

In a state where the coupler 28 is disposed at the first position P1, the gap DP1 between the lower ends 292D of the guide protrusions 292a and 292b and the engaging portions 2832a and 2832b is, the first stopper first The stoppers 28231x, 28231y, and 28231z are formed to be larger than the vertical length 28231L.

The solenoid module 27 moves the coupler 28 upward when a current is applied to the coil 2712 of the solenoid 271 . 14A to 14C , the solenoid module 27 pulls the coupler 28 upward. Accordingly, in FIGS. 14A to 14C , current is applied to the coil 2712 of the solenoid 271 , and the engaging portions 2832a and 2832b of the guide member 283 move upward.

14A to 14C, when the locking parts 2832a and 2832b move upward, the locking parts 2832a and 2832b come into contact with the lower surface guide part 2921 and move upward along the guide hole 294. do. Referring to FIG. 14C , the locking parts 2832a and 2832b move upward until the first stoppers 28231x, 28231y, and 28231z engage with the lower surface guide part 2921 . As shown in FIG. 13C , it can be seen that the coupler 28 is disposed at the third position P3 while the first stoppers 28231x, 28231y, and 28231z are in contact with the lower surface guide part 2921 .

The third position P3 of the coupler 28 is a lower surface guide portion 2921 of the first stopper 28231x, 28231y, 28231z or the second stopper 28232x, 28232y, 28232z of the guide projections 292a, 292b. In contact with the coupler guider 29 includes a rotated state. Therefore, as shown in FIG. 13c or 14b, the first stopper 28231x, 28231y, 28231z or the second stopper 28232x, 28232y, 28232z has a large area with the lower surface guide part 2921 of the guide protrusions 292a and 292b. may include the best position for the coupler 28 to move upward. However, as the coupler 28 moves upward, the first stoppers 28231x, 28231y, 28231z or the second stoppers 28232x, 28232y, 28232z are formed with the lower surface guide portion 2921 of the guide protrusions 292a and 292b. Upon initial contact, the 3-0 position (P3-0) in the state in which the coupler guider 29 is not rotated is not included in the third position (P3).

14A to 14C, when the engaging portions 2832a and 2832b move upward, they come into contact with the guide protrusions 292a and 292b, thereby rotating the coupler guider 29 forward. The coupler guider 29, when in contact with the guide member 283 or the stopper 28231x, 28232x, 28231y, 28232y, 28231z, 28232z of the coupler 28, rotates in one direction, and the rotation at this time is referred to as a forward rotation. . In addition, the reverse rotation of the forward rotation is defined as the reverse rotation of the coupler guider (29).

The engaging portions 2832a and 2832b move upward while in contact with the lower surface guide portion 2921, thereby rotating the coupler guider 29 forward. When the locking parts 2832a and 2832b move upward, the locking parts 2832a and 2832b move upward along the inclined surface of the lower surface guide part 2921, and the coupler guider 29 rotates forward. The coupler guider 29 rotates forward until the engaging portions 2832a and 2832b come into contact with the upper end of the lower surface guide portion 2921 .

The engaging portions 2832a and 2832b move upward along the guide hole 294 .

When the engaging portions 2832a and 2832b move upward along the guide hole 294, the engaging portions 2832a and 2832b are rotated by the coupler guider 29, and the engaging portions 2832a, 2832b are guide projections ( In contact with the first straight guide portion 2923 of 292a, 292b, the coupler guider 29 may rotate in reverse. However, the reverse rotation of the coupler guider 29 may be prevented by the second straight guide portion 2924 formed to have a predetermined length in the upward direction from the upper end of the lower surface guide portion 2921 .

In order to prevent reverse rotation of the coupler guider 29 , the vertical length 2924L of the second straight guide portion 2924 may be equal to or greater than the interval 294L of the guide hole 294 . In order to prevent reverse rotation of the coupler guider 29, the vertical length 2924L of the second straight guide portion 2924 may be formed to be larger than the cross-sectional diameter of the engaging portions 2832a and 2832b.

As the second straight guide part 2924 forms a predetermined length, the guide member 283 moving by the reversely rotating coupler guider 29 comes into contact with the second straight guide part 2924, and the coupler guider 29 ) to prevent reverse rotation.

When the engaging portions 2832a and 2832b pass through the guide hole 294 and move upward, the first stoppers 28231x, 28231y, and 28231z of the coupler 28 come into contact with the lower surface guide portion 2921 . The locking portions 2832a and 2832b are disposed above the first stoppers 28231x, 28231y, and 28231z. The locking portions 2832a and 2832b are disposed above the first stoppers 28231x, 28231y, and 28231z adjacent to the lower ends of the first stoppers 28231x, 28231y, and 28231z. That is, the engaging portions 2832a and 2832b are located at a position biased toward the lower end of the first stoppers 28231x, 28231y, and 28231z with respect to the center of the first stoppers 28231x, 28231y, and 28231z, the first stoppers 28231x, 28231y, 28231z).

In this structure, when the engaging portions 2832a and 2832b passing through the guide hole 294 move upward, even if the coupler guider 29 is stopped or partially reversed, the first stoppers 28231x, 28231y, 28231z and The lower surface guide portion 2921 may be in contact.

When the engaging portions 2832a and 2832b move upward, the first stopper inclined surface 28231a of the first stoppers 28231x, 28231y, and 28231z and the inclined surface of the lower surface guide portion 2921 are in contact with each other, and the coupler guide 29 ) is rotated forward. The coupler guider 29 rotates forward until the first straight guide portion 2923 of the guide protrusions 292a and 292b comes into contact with the second stopper vertical surface 28232b of the second stoppers 28232x, 28232y, and 28232z. Until the first straight guide portion 2923 of the guide protrusions 292a, 292b comes into contact with the second stopper vertical surface 28232b of the second stoppers 28232x, 28232y, 28232z, the engaging portions 2832a, 2832b are the upper side move to

Until the first straight guide portion 2923 of the guide protrusions 292a, 292b comes into contact with the second stopper vertical surface 28232b of the second stoppers 28232x, 28232y, 28232z, the engaging portions 2832a, 2832b are the upper side When moving to , the engaging portions 2832a and 2832b are disposed above the first inclined surface 29221 of the guide protrusions 292a and 292b.

Therefore, when the force that the solenoid module 27 pulls the coupler 28 upward is released, the coupler 28 moves downward by gravity, and the engaging parts 2832a and 2832b, the guide projections 292a and 292b. It moves to the engaging groove 29224 of the upper surface guide portion 2922 of the. That is, when the engaging portions 2832a and 2832b move downward, they come into contact with the first inclined surface 29221 of the upper surface guide portion 2922 and move. At this time, the coupler guider 29 rotates forward by the load applied to the lower side of the first inclined surface 29221 by the engaging portions 2832a and 2832b. The coupler guider 29 rotates forward until the engaging portions 2832a and 2832b are disposed in the engaging groove 29224 . When the engaging portions 2832a and 2832b are positioned in the engaging grooves 29224 of the guide protrusions 292a and 292b, the position of the coupler 28 may be fixed. At this time, even if no current is applied to the solenoid module 27 , the coupler 28 may be disposed to be spaced apart from the coupling flange 21232 upward by a predetermined interval.

Hereinafter, a process of changing from the second mode M2 to the first mode M1 according to the operation of the solenoid module 27 will be described with reference to FIGS. 15A to 15D . That is, a process in which the coupler 28 moves the dewatering shaft 25 and the driving shaft 22 from the shaft joint release state to the shaft joint state will be described. This may be a second mode changing step performed after the first mode changing step in a control method of a washing machine to be described below.

15A shows the stoppers 28231x, 28232x, 28231y, 28232y, 28231z, 28232z, the guide member 283 and the guide protrusions 292a and 292b in a state where the coupler 28 is disposed at the second position P2. The deployed state is shown.

In the state where the coupler 28 is disposed at the second position P2, the gap HP2 between the lower end 2823d of the stopper and the lower end 292D of the guide protrusions 292a and 292b is the lower end 2823d of the stopper. It is formed shorter than the interval (D1) between the and the engaging portions (2832a, 2832b).

The solenoid module 27 moves the coupler 28 upward when a current is applied to the coil 2712 of the solenoid 271 . 14A to 14B, the solenoid module 27 pulls the coupler 28 upward. Accordingly, in FIGS. 14A to 14B , current is applied to the coil 2712 of the solenoid 271 , and the engaging portions 2832a and 2832b of the guide member 283 move upward.

The locking portions 2832a and 2832b move upward in the locking groove 29224 . When the engaging portions 2832a and 2832b move upward, the second stopper inclined surface 28232a of the second stoppers 28232x, 28232y, and 28232z and the inclined surface of the lower surface guide portion 2921 are in contact with each other, and the coupler guider 29 ) is rotated forward. The coupler guider 29 rotates forward until the first straight guide portion 2923 of the guide projections 292a and 292b comes into contact with the first stopper vertical surface 28231b of the first stoppers 28231x, 28231y, and 28231z. Until the first straight guide portion 2923 of the guide protrusions 292a and 292b comes into contact with the first stopper vertical surface 28231b of the first stoppers 28231x, 28231y, 28231z, the engaging portions 2832a and 2832b move upward. move to

Until the first straight guide portion 2923 of the guide protrusions 292a and 292b comes into contact with the first stopper vertical surface 28231b of the first stoppers 28231x, 28231y, 28231z, the engaging portions 2832a and 2832b move upward. When moving to , the engaging portions 2832a and 2832b are disposed above the second inclined surface 29222 of the guide projections 292a and 292b.

When the power of the solenoid module 27 to pull the coupler 28 upward is released, the coupler 28 moves downward by gravity, and the engaging portions 2832a and 2832b have a plurality of guide protrusions 292a and 292b. It moves to the guide hole 294 formed therebetween. That is, when the engaging portions 2832a and 2832b move downward, they come into contact with the second inclined surface 29222 of the upper surface guide portion 2922 and move. At this time, the coupler guider 29 rotates forward by the load applied to the lower side of the second inclined surface 29222 by the engaging portions 2832a and 2832b. The coupler guider 29 rotates forward until the engaging portions 2832a and 2832b move to the guide hole 294 .

While the engaging portions 2832a and 2832b move downward of the coupler guider 29 along the guide hole 294, the coupler 28 moves downward. The coupler 28 moves downward until it reaches the first position P1 of the coupler 28 .

As the coupler 28 moves downward, the driving force transmitting portions 2824a and 2824b of the coupler 28 are disposed to engage the coupling flange 21232 . At this time, the coupler 28 is in a state capable of transmitting the driving force of the driving motor 21 to the spin-drying shaft 25 .

<control unit and related configuration>

Hereinafter, with reference to FIG. 16 , the control unit 142 for controlling the driving of the washing machine according to the present invention and a related configuration thereof will be described.

The washing machine according to the present invention includes a control unit 142 that controls the driving motor 21 to rotate or controls the solenoid module 27 to generate a magnetic field.

The controller 142 may apply a current to the driving motor 21 to cause the driving motor 21 to generate a driving force. When the driving motor 21 is rotated by the controller 142 , the driving shaft 22 connected to the rotor bush 21231 rotates together. When the driving motor 21 is rotated by the control unit 142, the spin-drying shaft 25 may be selectively rotated. When the coupler 28 is engaged with the coupling flange 21232 , when the driving motor 21 rotates, the dehydration shaft 25 rotates together with the driving motor 21 . However, in a state where the coupler 28 is spaced apart from the coupling flange 21232, when the driving motor 21 rotates, only the driving shaft 22 rotates, and the dehydration shaft 25 does not rotate.

The control unit 142 may operate the driving motor 21 to perform a washing cycle or a dehydration cycle. In the washing cycle, the coupler 28 releases the coupling between the drive shaft 22 and the dehydration shaft 25, and only the drive shaft 22 rotates due to the operation of the drive motor 21, and the pulsator 13a rotates. means administration. In the spin-drying process, the coupler 28 connects the driving shaft 22 and the spin-drying shaft 25, and both the driving shaft 22 and the spin-drying shaft 25 rotate by the operation of the driving motor 21, and the pulsator ( 13a) and the washing tub 13 both refer to a rotation cycle.

The washing machine according to the present invention may further include a load sensing unit 144 that senses a load of current flowing to the driving motor 21 when performing a washing cycle or a spin-drying cycle. The control unit 142 may detect errors in the washing cycle and the spin-drying cycle based on the load of the current detected by the load sensing unit 144 .

In the case of the washing cycle, only the pulsator 13a rotates due to the operation of the driving motor 21 , and in the case of the dehydration cycle, the pulsator 13a and the washing tub 13 rotate together due to the operation of the driving motor 21 . Accordingly, in the case of the dehydration cycle, the amount of load sensed by the load sensing unit is larger than that of the washing cycle.

The control unit 142 may operate the driving motor 21 to rotate the driving shaft 22 . As shown in FIG. 20 , the control unit 142 may operate the driving motor 21 so that the driving shaft 22 accelerates rotation, maintains rotation, and decelerates rotation.

In the first mode M1, when the driving motor 21 operates, the coupler 28 engaged with the coupling flange 21232 also rotates. That is, when the control unit 142 operates the drive motor 21 to accelerate rotation, maintenance rotation, and deceleration rotation of the drive shaft 22, the coupler 28 can also rotate in acceleration rotation, maintenance rotation, and deceleration rotation together. have. On the other hand, in the second mode M2, even when the driving motor 21 operates, the coupler 28 does not rotate.

The control unit 142 operates the solenoid module 27 to change the arrangement of the coupler 28 located at the first position P1 to the second position P2, or the coupler located at the second position P2 ( 28) can be changed to the first position P1. In addition, the control unit 142 may operate the solenoid module 27 to maintain or change the arrangement of the coupler 28 located at the first position P1 or the second position P2 to the first position P1. have.

The control unit 142 moves the coupler 28 disposed in the second position P2 to a position in contact with the coupler guider 29, and moves the coupler 28 disposed in the first position P1 to the coupler guider ( 29) operates the solenoid module 27 to move it to a position not in contact with it.

The control unit 142 includes a range in which the coupler guider 29 does not rotate when the engaging portions 2832a and 2832b move upward along the guide hole 294, and the engaging portions 2832a and 2832b are the engaging grooves. (29224) When moving upward, the coupler guider 29 is rotated to the extent that the solenoid module 27 is operated so that the coupler moves. Here, the range in which the coupler guider 29 does not rotate is the range in which the coupler guider 29 does not rotate in contact with the lower surface guide portion 2921 of the guide protrusion 292 and the stopper 2823 of the coupler 28 . As such, it may mean a height that does not contact the lower surface guide portion 2921 of the guide protrusion 292 and the stopper 2823 of the coupler 28 . In addition, the range in which the coupler guider 29 rotates means the range in which the coupler guider 29 rotates in contact with the lower surface guide portion 2921 of the guide protrusion 292 and the stopper 2823 of the coupler 28 . do. That is, in the range in which the coupler guider 29 rotates, in a state in which the lower surface guide portion 2921 of the guide protrusion 292 and the stopper 2823 of the coupler 28 are in contact, the coupler 28 moves upward. Thus, the coupler guider 29 is rotated.

The control unit 142 may operate the solenoid module 27 when the driving motor 21 operates. The control unit 142 may operate the solenoid module 27 when the drive shaft 22 rotates in an accelerated or decelerated manner. Preferably, the control unit 142 may operate the solenoid module 27 when the driving shaft 22 rotates at reduced speed.

When the driving motor 21 is operated, when the solenoid module 27 is operated, the coupler 28 disposed at the first position P1 is restricted from moving upward. In the first position (P1), the coupler 28 is disposed to engage the coupling flange (21232). Therefore, when the driving motor 21 operates, the coupler 28 disposed at the first position P1 also maintains a state of rotation together with the driving shaft 22, so even if the solenoid module 27 operates, the coupler The upward movement of (28) is restricted. In addition, when the driving motor 21 is operated and the driving shaft 22 is accelerated or decelerated, the upward movement of the coupler 28 is limited by the frictional force generated on the contact surface of the coupling flange 21232 and the coupler 28. .

However, the coupler disposed at the second position P2 may move upward when the solenoid module 27 operates regardless of the operation of the driving motor 21 . Accordingly, even when the driving motor 21 operates, the coupler disposed at the second position P2 may move to the first position P1 when the solenoid module 27 operates.

Also, the controller 142 may control the water supply valve 162 or control the operation of the drain pump 173 .

<Control method>

Hereinafter, a method for controlling a washing machine according to the present invention will be described with reference to FIGS. 12A to 20 .

In the washing machine control method of the present invention, by the operation of the solenoid module 27, the coupler 28 disposed at the first position P1 or the second position P2 is positioned at the first position P1. ), a mode initialization step (S100) of adjusting the arrangement is performed. That is, the mode initialization step ( S100 ) is a step of adjusting the arrangement of the coupler 28 to become the first mode ( M1 ). Thereafter, by the operation of the solenoid module 27, the arrangement of the coupler 28 disposed at the first position P1 of the first mode M1 is changed to the second position P2 of the second mode M2. A first mode change step (S200a) is performed. Thereafter, by the operation of the solenoid module 27, the arrangement of the coupler 28 disposed at the second position P2 of the second mode M2 is changed to the first position P1 of the first mode M1. A second mode change step (S200b) is performed.

In the mode initialization step (S100), the coupler 28 disposed in the first mode M1 and the coupler 28 disposed in the second mode M2 follow the guide hole 294 formed in the coupler guider 29. In order to move the coupler guider 29 downward, a current is applied to the coil of the solenoid module 27 to move the coupler 28 upward.

Hereinafter, the mode initialization step ( S100 ) will be described in various ways.

First, the mode initialization step S100 according to the first embodiment will be described with reference to FIGS. 12A to 18 . In the mode initialization step (S100), the control unit 142, the solenoid so that the coupler 28 is moved to a height equal to or less than the interval H3 between the first position P1 and the second position P2 of the coupler 28. Activate the module 27 . In the mode initialization step (S100), the control unit 142, the coupler 28 to a height less than the gap (H1) between the first position (P1) to the third position (P2) of the coupler 28 solenoid solenoid to move Activate the module 27 . The control unit 142 operates the solenoid module 27 to move the coupler 28 to a height greater than or equal to the distance H2 between the second position P2 and the third position P2 of the coupler 28 .

In the mode initialization step (S100), the control unit 142, when the coupler 28 disposed at the first position (P1) moves upward, the first stopper 28231 and the lower surface of the guide projection 292 guide In a range where the part 2921 does not contact, the solenoid module 27 is operated so that the coupler 28 moves. In the mode initialization step (S100), the control unit 142, when the coupler 28 disposed in the second position (P2) moves upward, the second stopper 28232 and the lower surface of the guide projection 292 guide portion (2921) is in contact, the coupler guider (29) operates the solenoid module (27) to the extent that it rotates to move the coupler (28).

During the mode initialization step S100 , the first mode M1 in which the coupler 28 is disposed at the first position P1 is maintained. During the mode initialization step S100 , the coupler 28 of the second mode M2 disposed at the second position P2 is changed to the first mode M1 disposed at the first position P1 .

13A to 13C and 14A to 14B, in the first mode change step of changing from the first mode M1 to the second mode M2, the distance that the coupler 28 moves upward ( H1) is formed longer than the distance H2 at which the coupler 28 moves upward in the second mode changing step S200b, which is changed from the second mode M2 to the first mode M1.

Therefore, in the first mode changing step S200a, the time T1 required to move the coupler 28 upward, and the time required to move the coupler 28 upward in the second mode changing step S200b. (T2) may be different. That is, in the first mode changing step S200a, the time T1 required to move the coupler 28 upward is the time it takes to move the coupler 28 upward in the second mode changing step S200b. It is formed longer than (T2).

In the mode initialization step (S100), in the first mode changing step (S200a), the solenoid module 27 is operated in a shorter time than the time T1 required to move the coupler 28 upward. In the mode initialization step S100, the solenoid module 27 is operated for more than the time T2 required to move the coupler 28 upward in the second mode changing step S200b. Specifically, the time for which current is applied to the coil 2712 of the solenoid 271 in the mode initialization step S100 is the minimum time T1 for which the current is applied to the coil 2712 in the first mode change step S200a. ) and the minimum time T2 for which the current is applied to the coil 2712 in the second mode changing step S200b.

Accordingly, in the mode initialization step S100 , the second mode changing step S200b may be performed, but the first mode changing step S200a is not performed.

A mode initialization step ( S100 ) according to the second embodiment will be described with reference to FIGS. 19 to 20 .

In the mode initialization step (S100), a step (S110) in which the driving motor 21 is operated, a step (S120) in which the solenoid module 27 is operated, and a step (S130) in which the driving motor 21 is stopped is performed. .

In the mode initialization step S100 , the control unit 142 operates the solenoid module 27 while the driving motor 21 is being operated.

Referring to FIG. 20 , the operation of the driving motor 21 ( S110 ) may include an acceleration step ( S112 ), a speed maintenance step ( S114 ), and a deceleration step ( S116 ). The operation of the solenoid module 27 ( S120 ) may be performed in the step of decelerating the driving motor 21 ( S116 ).

Referring to FIG. 20 , the operation of the solenoid module 27 ( S120 ) may be performed after a predetermined time after the driving motor 21 starts to decelerate ( S116 ). Referring to FIG. 20 , the step of stopping the driving motor 21 ( S130 ) may be performed after a predetermined time has elapsed after the step ( S120 ) of the operation of the solenoid module 27 .

In the mode initialization step (S100), the second mode changing step (S300) may be performed, but the first mode changing step (S200) is not performed.

That is, since the coupler 28 disposed in the second position P2 is not engaged with the coupling flange 21232, in the mode initialization step S100, when the solenoid module 27 operates, as shown in FIGS. 15a to 15d and moves to the first position P1.

On the other hand, since the coupler 28 disposed at the first position P1 is engaged with the coupling flange 21232 , when the driving motor 21 operates, it rotates together with the driving shaft 22 . At this time, in the process of accelerating or decelerating the driving motor 21, the frictional force between the coupling flange 21232 and the coupler 28 increases, so even if the solenoid module 27 operates, the upward movement of the coupler 28 is Limited. However, when the coupler 28 disposed at the second position P2 moves downward, in order to prevent damage due to friction with the coupling flange 21232, the solenoid module 27 in the process of decelerating the driving motor 21 ) is preferred to work.

Therefore, in the state in which the mode initialization step (S100) is in progress, the coupler 28 is moved to the first position (P1).

Thereafter, a first mode for changing the arrangement of the coupler 28 disposed at the first position P1 in the first mode M1 to the coupler 28 disposed at the second position P2 in the second mode M2. A mode change step (S200a) is performed. This is done in the same manner as the arrangement change of the coupler 28 described above with reference to FIGS. 13A to 13D.

Thereafter, a second mode for changing the arrangement of the coupler 28 disposed at the second position P2 in the second mode M2 to the coupler 28 disposed at the first position P1 in the first mode M1 A mode change step (S200b) is performed. This is done in the same manner as the arrangement change of the coupler 28 described above with reference to FIGS. 14A to 14D.

<Mode check and error detection>

Hereinafter, a method for controlling a washing machine according to the present invention will be described with reference to FIGS. 18 to 19 .

In the washing machine control method of the present invention, after the mode changing step ( S200 ), the driving motor 21 is operated to perform the washing cycle or the spin-drying cycle, the mode check step ( S300 ) may be performed.

In the mode check step S300 , when the driving motor 21 is operated, the load amount of the current flowing to the driving motor 21 may be sensed to detect whether the driving motor 21 has an error.

The mode check step ( S300 ) increases the error count (E) when the load amount sensed according to the operation of the driving motor 21 is not satisfied. In addition, in the mode check step (S300), when the error count (E) increases to a certain level or more, an error signal of the driving motor 21 is sent.

In the mode check step (S300), when the error count (E) increases to a certain level or more, the mode initialization step (S100) may be performed.

Referring to FIG. 18 , the mode check step S300 may be performed after the mode change step S200 . Here, the mode changing step S200 may be one of the first mode changing step 200a and the second mode changing step 200b. In the mode check step (S300), if the load of the current flowing to the driving motor 21 satisfies the set value, the mode performing step (S400) of performing a washing cycle or a dehydration cycle is performed. In the mode performing step (S400), a washing cycle or a dehydration cycle may be performed, which may perform a changed mode according to the mode changing step (S200). That is, in the mode changing step (S200), when the first mode changing step (200a) is performed, the washing cycle is performed in the mode performing step (S400), and in the mode changing step (S200), the second mode changing step ( 200b), the dehydration process may be performed in the mode performing step (S400).

Load set values required in the washing cycle and the dehydration cycle are formed differently. That is, the set load value required for the spin-drying cycle is greater than the set load value required for the washing cycle.

Referring to FIG. 19, the mode check step (S300) will be described in detail.

In the mode check step (S300), the error count (E) starts at '0' (S312). The control unit 142 operates the driving motor 21 , and the load sensing unit 144 detects a load amount of the current flowing to the driving motor 21 ( S314 ). The control unit 142 determines whether the load amount sensed by the load sensing unit 144 satisfies a load set value (S316).

When the amount of load sensed by the load sensing unit 144 satisfies the load set value, the control unit 142 may perform a washing cycle or a spin-drying cycle (S400). When the amount of load sensed by the load sensing unit 144 does not satisfy the load set value, the error count E is increased (S318).

The controller 142 repeatedly performs the steps S312 to S318, and when the error count E is the first set value N1 (S330), the coupler setting step (S332) is performed.

In the coupler setting step S332, only the mode initialization step S100 may be performed, or the mode initialization step S100 and the first mode change step 200a may be performed. When the mode changing step (S200) is the second mode changing step (200b) for performing the washing cycle, the mode initialization step (S100) and the first mode changing step (200a) are performed, and the first mode for the spin-drying cycle In the case of the change step 200a, only the mode initialization step S100 is performed.

That is, if the mode initialization step (S100) proceeds, the coupler 28 moves to the first position P1, so that the dehydration operation is possible. Therefore, when the mode changing step (S200) is the first mode changing step (200a) for performing the washing cycle, after the mode initialization step (S100), the first mode changing step (S200a) is performed to enable the washing cycle The position of the furnace coupler 28 is changed.

After the coupler setting step (S332), the control unit 142 operates the driving motor 21, and the load sensing unit 144 detects the load amount of the current output to the driving motor 21 (S334). do. The control unit 142 determines whether the load value detected by the load sensing unit 144 satisfies a set load value (S336).

When the load value sensed by the load sensing unit 144 satisfies the set load value, the mode execution step (S400) is performed (S400). If the load value sensed by the load sensing unit 144 does not satisfy the set load value, an error counting step (S318) is performed.

The control unit 142 repeatedly performs steps S312 to S318 to transmit a motor error signal to the notification unit 146 when the error count E is the second set value N2 (S328).

The second set value N2 may be set to a value greater than the first set value N1 .

The control unit 142, when the error count (E) satisfies the second set value (N2), may perform the unwinding operation (S322). In this case, when the mode changing step ( S200 ) is the second mode changing step ( 200b ) for performing the washing cycle, the unwinding cycle ( S322 ) is performed. Therefore, when the mode changing step ( S200 ) is the second mode changing step ( 200b ) for performing the dewatering operation, it is also possible that the unwinding operation ( S322 ) is omitted.

Here, the cloth unwinding process refers to the process of supplying water when the driving motor 21 cannot operate properly due to entanglement, etc., in the washing process, and the driving motor 21 cannot be operated properly, so that the washing tub is stirred left and right. Through the process of rotating the driving motor, it may mean a stroke of releasing the tangled state of the fabric.

After the unwinding operation (S322) is performed, the control unit 142 may operate the driving motor 21 and the load sensing unit 144 may detect a load value of the current output to the driving motor 21 ( S324).

The control unit 142 determines whether the load value sensed by the load sensing unit 144 satisfies the set load value (S326), and when the load value detected by the load sensing unit 144 satisfies the set load value , the mode performing step (S400) proceeds (S400). When the load value detected by the load sensing unit 144 does not satisfy the set load value, the control unit 142 may send a motor error signal to the notification unit 146 (S328).

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

11: casing 12: water tank
13: washing tub 13a: pulsator
21: drive motor 211: stator
212: rotor 22: drive shaft
23: pulsator shaft 24: gear module
25: de-shrink 251: lower de-shrink
252: upper de-shrinkage 253: gear housing
27: solenoid module 271: solenoid
2711: bobbin 2712: coil
272: fixed core 273: solenoid housing
28: coupler 281: moving core
282: coupler body 283: guide member
29: coupler guider 291: coupler guider body
292: guide projection 293: fixing ring

Claims (14)

A mode conversion step of moving the arrangement of the coupler by operating the solenoid module so that the drive shaft for rotating the pulsator and the dehydration shaft for rotating the washing tub are shaft-joined, or the shaft-joint is released;
A mode check step of operating a drive motor rotating the drive shaft and sensing a load amount of current output to the drive motor,
The mode checking step includes a coupler setting step of relocating the position of the coupler by operating the solenoid module when the load amount of the current output to the driving motor does not satisfy a load set value. The method of claim 1,
The mode check step is,
Repeatedly performing the steps of sensing the load amount of the current output from the drive motor and determining whether the load amount of the voltage applied to the drive motor satisfies a load set value,
A control method of a washing machine for increasing an error count when a load amount of a voltage applied to the driving motor does not satisfy a load set value. 3. The method of claim 2,
The mode check step is,
When the error count corresponds to a first set value, the control method of the washing machine performing the coupler setting step. The method of claim 1,
The coupler setting step is,
and a mode initialization step of operating the solenoid module so that the drive shaft and the dehydration shaft are arranged in a shaft joint state. 5. The method of claim 4,
The coupler setting step is,
After the mode initialization step, a first mode changing step of selectively operating the solenoid module to dispose the coupler so that the drive shaft and the dehydration shaft are in a state where the shaft joint is released. 5. The method of claim 4,
The mode initialization step is
A control method of a washing machine for operating the solenoid module so that the coupler moves below a set height. 5. The method of claim 4,
The mode initialization step is
operating the drive motor to rotate the drive shaft connected to the pulsator;
A control method of a washing machine comprising the step of operating a solenoid module to generate an attractive force in a coupler that shaft-joins a dehydration shaft connected to an inner tub to the drive shaft or releases a shaft coupling according to an arrangement. 5. The method of claim 4,
The mode change step is
A first mode changing step of moving the arrangement of the coupler so that the drive shaft and the dehydration shaft are shaft-joined, and a second mode changing step of moving the arrangement of the coupler so that the drive shaft and the dehydration shaft are shaft-joined ,
In the mode changing step, when the first mode changing step is performed, the coupler setting step includes performing the first mode changing step after the mode initialization step. The method of claim 1,
In the mode checking step, after the coupler setting step, the driving motor for rotating the driving shaft is operated, and a load amount of current output to the driving motor is sensed. 10. The method of claim 9,
In the mode check step, after the coupler setting step, when the load amount of the voltage applied to the driving motor does not satisfy the load set value, the error count is increased. 4. The method of claim 3,
In the mode check step,
When the error count corresponds to a second set value greater than the first set value, the control method of the washing machine sends the motor error occurrence signal. 12. The method of claim 11,
The mode change step is
A first mode changing step of moving the arrangement of the coupler so that the drive shaft and the dehydration shaft are shaft-joined, and a second mode changing step of moving the arrangement of the coupler so that the drive shaft and the dehydration shaft are shaft-joined ,
In the mode checking step, when the first mode changing step is performed in the mode changing step and the error count corresponds to the second set value, a cloth unwinding operation is performed. 13. The method of claim 12,
In the mode checking step, when the load amount of the voltage applied to the driving motor does not satisfy a load setting value after the cloth unwinding operation, the washing machine control method of sending the motor error occurrence signal. The method of claim 1,
and a mode performing step of operating the driving motor when a load value of the current output to the driving motor satisfies a load set value.

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