KR100925428B1 - Structure of driving part of washing machine and method for controlling operation of washing machine by using the same - Google Patents

Abstract

The present invention in order to improve the washing and rinsing performance and efficiency by diversifying the washing method and the water flow by allowing only the pulsator to rotate or the pulsator and the washing tank reverse rotation in the washing and rinsing in the direct-type washing machine will be.

To this end, the present invention and the outer tub is installed in the main body; A washing tank rotatably installed in the outer tank; A pulsator installed inside the washing tub; A dewatering contraction fixedly installed at the center of the lower end of the washing tank; An upper laundry shaft rotatably installed in the dehydration shaft and coupled to a pulsator and a lower laundry shaft coupled to a driving means; Drive means for generating power to rotate the lower laundry shaft; A coupling for selectively transmitting power of the drive means to the laundry shaft and / or the dehydration shaft; A deceleration device for reducing the rotational speed of the lower washing shaft and transmitting the deceleration device to a pulsator; Washing tank fixing means for fixing the washing tank when the pulsator rotates; Washing tank reverse rotation means for rotating the washing tank in a direction opposite to the turning direction of the pulsator when the pulsator rotates; A washing machine comprising the washing machine and a driving control method thereof are provided. The pulsator and the washing tank simultaneously rotate in one direction to simultaneously rotate in the same direction.

Washing machine, fixed, reverse rotation, driving part

Description

Structure of driving part of washing machine and method for controlling operation of washing machine by using the same}

1 is a cross-sectional view showing a drive unit structure of a washing machine according to the prior art.

2 is a cross-sectional view showing a washing machine drive unit structure of the present invention.

3A to 3C are cross-sectional views illustrating the operation of the washing machine driving unit of the present invention.

Figure 3a is a state diagram in a fixed mode during washing and rinsing

Figure 3b is a state diagram in the reverse rotation mode during washing and rinsing

3c is a state diagram at the time of dehydration

4 is a diagram for explaining washing and rinsing in a washing machine to which a driving unit of the present invention is applied, and directions of rotation of a pulsator and a washing tank during dehydration.

Explanation of symbols on the main parts of the drawings

11: Outer 12: tub base

13: Bearing housing 26: Coupling

28: fixture 15: stator

16: rotor 17: rotor housing                 

18: rotor bushing 21: lower laundry shaft

23: upper laundry shaft 25a: upper dewatering contraction

25b: Lower deshrinkage 22: Reduction gear

29: gear housing 30: brake band

The present invention relates to a washing machine, and more particularly, in a direct-type washing machine, a driving unit structure for diversifying a washing method and a washing water flow by allowing only a pulsator to rotate or reverse rotation of a pulsator and a washing tank during washing and rinsing. It relates to an improvement and a washing machine operation control method accordingly.

In general, a washing machine is a household appliance that washes laundry by the flow of the washing water generated by forced flow of the supplied washing water, and friction and emulsification of the detergent. The washing process of the washing machine is usually performed by washing, rinsing, Dehydration and drainage

The washing machine is fixed to the outer tank for receiving the wash water inside the cabinet forming the outer appearance, the washing tank in which the laundry is contained is rotatably installed in the outer tank, the drive unit is installed to rotate the washing tank in the lower portion of the outer tank.

Hereinafter, the driving unit of the washing machine according to the prior art will be described with reference to FIGS. 1 and 2.                         

1 is a configuration diagram showing a structure of a driving unit of a conventional washing machine.

Looking at the conventional washing machine structure, the outer tank 11 is installed inside the main body (not shown) constituting the washing machine case, the washing tank (not shown) is rotatably installed around a vertical central axis, Upper and lower dehydration shafts 25a and 25b are provided at the lower part of the washing tank, and upper and lower dehydration shafts 25a and 25b are provided in the upper and lower dehydration shafts 25a and 25b, respectively. The 21 is rotatably installed.

That is, the washing shaft is coupled to the drive motor lower washing shaft 21 is installed to receive power and the upper washing shaft 23 is separated from the upper washing shaft 21, the upper washing shaft 23 is installed so that the upper end is rotatable to the lower end of the washing tank It consists of two parts.

Couplings 26 are provided on the upper and lower dehydration shafts 25a and 25b on the lower outer circumferential surface to selectively transmit the power of the driving motor to the dehydration shaft.

The tub base 12 is fixed to the lower end of the outer tub 11 to support the lower end of the outer tub 11, and a bearing housing 13 is fixed to the lower part of the tub base.

A motor consisting of a stator 15 and a rotor 16 is installed below the bearing housing 13.

At this time, the rotor housing 17 is fixed to the rotor 16 so as to surround the outside of the rotor.

The rotor 16 is installed so as to be spaced apart from the outside of the stator 15 by a predetermined interval, the rotor 16 is rotated by the magnetic field formed in the stator 15, the rotor housing 17 also rotates together with the rotor do.

The rotor bushing 18 is installed in the center of the rotor housing 17, and the lower end of the lower washing shaft 21 is inserted into the rotor bushing 18. At this time, the outer peripheral surface of the lower end of the lower washing shaft 21 is formed to form a polygonal surface, the rotor bushing 18 is joined to the outer peripheral surface structure to transmit the rotational force of the rotor 16 to the lower washing shaft 21 Has

In the bearing housing 13, a deceleration device 22 is installed to reduce the rotational speed of the lower washing shaft while transferring the washing to the upper washing shaft 23.

At this time, the deceleration device 22 is made of gears for deceleration in the gear housing 29, the main gear 112 is fixed to the upper end of the lower washing shaft 21, the upper washing The carrier disk 125 is provided with a plurality of planetary gear portion 113 is rotated in engagement with the main gear 112, the lower end of the shaft 23, the planetary gear portion 113 on the inner peripheral surface of the gear housing (29) The internal gear part 114 which engages with and is formed integrally and is comprised.

Meanwhile, the upper washing shaft 23 and the lower washing shaft 21 are rotatably installed in the upper and lower dehydration shafts 25a and 25b, and a washing tank (not shown) is provided at the upper end of the upper dewatering shaft 25a. ) Is fixedly installed, and a pulsator (not shown) is connected to the upper end of the upper washing shaft 23.

In addition, the lower end of the lower dewatering shaft 25b is installed to be spaced apart from the upper surface of the rotor bushing 18 by a predetermined interval. At this time, the rotor bushing 18 is fixed to the rotor housing 17 by a fastening member 19.

In addition, serrated serrations are formed on the outer circumferential surface of the lower end of the lower dehydration shaft 25b and the upper circumferential surface of the rotor bushing 18, and on the outer circumferential surface of the lower dehydration shaft 25b and the rotor bushing 18. The coupling 26 is installed to be movable up and down by the operation of a separate movable means (not shown). A bearing 14 is installed between the upper and lower dehydration shafts 25a and 25b, the tub base 12, and the bearing housing 13 so that the upper and lower dehydration shafts 25a and 25b rotate smoothly. do.

And the lower surface of the bearing housing 13 is provided with a fixture (28) having a gear tooth meshing with the gear teeth of the coupling 26.

Due to this structure, the coupling 26 moves upward when washing to restrain the dehydration shaft by engaging the gear of the fixture 28 so that only the washing shaft is rotated, or moves downward when the rotor 16 is dehydrated. The rotational force is transmitted to the dehydration shafts 25a and 25b and the washing shafts 21 and 23 so that the dehydration shaft and the washing shaft are rotated at the same time.

The operation of the driving unit of the washing machine is described as follows.

When the washing operation starts after the laundry and the washing water are supplied to the washing tank, a magnetic field is generated as power is applied to the stator 15, and the rotor 16 is rotated by the magnetic field.

The rotational force of the rotor 16 is transmitted to the rotor bushing 18 through the rotor housing 17, and the rotational force transmitted to the rotor bushing 18 is transmitted to the lower washing shaft 21.

At this time, the coupling 26 is moved to the upper and engaged with the fixture 28 fixed to the bearing housing 13 to prevent rotation of the dehydration shaft, the rotational force of the rotor 16 is only the lower washing shaft 21 Delivered.

Then, the rotation speed of the lower washing shaft 21 is decelerated at a constant reduction ratio in the reduction apparatus 22, and the upper washing shaft 23 and the pulsator are rotated at a reduced speed to perform the washing stroke. .

On the other hand, after the washing stroke is completed, a rinsing stroke is performed, and when the rinsing stroke is completed, a dehydration stroke is performed to minimize the moisture contained in the laundry.

In the dehydration stroke, the coupling 26 is moved downward to engage the serration portion 18a formed at the lower end of the outer circumferential surface of the lower dehydration shaft 25b and the upper end of the rotor bushing 18.

Accordingly, since the rotational force of the rotor 16 is simultaneously transmitted to the washing shafts 21 and 23 and the dewatering shafts 25a and 25b, the pulsator connected to the washing shaft and the washing tank connected to the dewatering shaft are simultaneously rotated at high speed. .

The laundry is washed through the washing stroke, the rinsing stroke and the dehydrating stroke, and recently, the drying stroke is additionally added after the dehydrating stroke.

However, in the related art, since only the pulsator rotates during washing and rinsing, the washing and rinsing water flow cannot be diversified.

That is, the conventional direct-type washing machine has a limitation that it is difficult to expect the improvement of the washing and rinsing performance by the diversification of the water flow due to the generation of water flow only by the stirring of the pulsator.

The present invention has been made to solve the problems of the prior art described above, diversify the washing method and the water flow by allowing only the pulsator to rotate or the pulsator and the washing tank can be rotated back when washing and rinsing in the direct-type washing machine And it is an object of the present invention to provide a drive structure of the washing machine and the washing machine operation control method according to the washing and rinsing performance and the efficiency by activating the flow of the washing water.

In order to achieve the above object, the present invention and the outer tub is installed in the main body; A washing tub rotatably installed in the outer tub; A pulsator installed inside the washing tub; A dehydration shaft fixedly installed at the center of the lower end of the washing tank; An upper laundry shaft rotatably installed in the dehydration shaft and coupled to a pulsator and a lower laundry shaft coupled to a driving means; Drive means for generating power to rotate the lower laundry shaft; A coupling for selectively transmitting power of the drive means to the laundry shaft and / or the dehydration shaft; A deceleration device for reducing the rotational speed of the lower washing shaft and transmitting the deceleration device to a pulsator; Washing tank fixing means for fixing the washing tank when the pulsator rotates; Washing tank reverse rotation means for rotating the washing tank in a direction opposite to the turning direction of the pulsator when the pulsator rotates; The washing machine is provided, comprising a; one-way simultaneous rotation means for the pulsator and the washing tank to rotate in the same direction at the same time.

On the other hand, according to another aspect for achieving the above object, the present invention and the outer shell; A washing tank installed inside the outer tank; A tub base fixed to a lower end of the outer tub; A bearing housing fixed to the lower portion of the tub base; A fixture installed to engage the gear of the coupling with a lower surface of the bearing housing; A stator fixed to the bearing housing and a rotor rotatably installed outside the stator; A rotor housing surrounding an outer side of the rotor; A rotor bushing installed at a center of the rotor housing and having a lower washing shaft penetrated therein; A lower laundry shaft and an upper laundry shaft which are directly connected to the rotor and rotate together when the rotor is rotated; A lower dehydration shaft installed outside the lower laundry shaft and an upper dehydration shaft installed outside the upper laundry shaft; A reduction gear configured to include a gear housing installed between the upper dehydration shaft and the lower dehydration shaft and a gear train installed inside the gear housing, and fixed during washing to reduce the rotational speed of the lower washing shaft and to transfer the lower washing shaft to the upper washing shaft. ; A brake band installed on the gear housing outer circumferential surface to restrain or freely rotate the gear housing and lifting along the lower dehydrating outer circumferential surface and the rotor bushing outer circumferential surface and combined with a fixture when fully raised to rotate the lower dewatering shaft; The washing tub is restrained, and the washing tub coupled to the upper dehydration shaft rotates in the opposite direction with respect to the pulsator coupled to the upper washing shaft in a state not engaged with the rotor bushing instead of falling out of engagement with the fixture by descending a predetermined distance. A reverse rotation and a coupling for simultaneously rotating the pulsator and the washing tub by simultaneously engaging the outer circumferential surface of the rotor bushing and the lower dewatering shaft engaged with the lower washing shaft when fully lowered; A washing machine configured to include is provided.

On the other hand, according to another aspect of the present invention, the outer tub, the washing tub installed inside the outer tub, a fixture installed in the lower portion of the outer tub, the stator fixed to the bearing housing and the rotor rotatably installed outside the stator and And a rotor housing surrounding the outer side of the rotor, a rotor bushing installed at the center of the rotor housing and having a lower laundry shaft penetrated therein, and a lower laundry shaft and an upper portion which are directly connected to the rotor and rotate together when the rotor is rotated. A laundry shaft, a dehydration shaft provided outside the lower laundry shaft, and an upper laundry shaft disposed outside the upper laundry shaft, a gear housing provided between the upper dehydration shaft and the lower dehydration shaft, and a gear train provided therein. Reduction device configured to include, and the gear housing is provided on the outer peripheral surface to restrain or release the gear housing In the microphone and the band, the operation control method of the lower outer peripheral surface de-shrinkage or the expression hayeoseo include coupling to the lifting rotor bushing along the outer peripheral surface directly washing machine; When washing and rinsing, the washing machine is operated in at least one of a washing tank fixed mode in which only the pulsator is stirred while the washing tank is fixed, or a washing tank reverse rotation mode in which the washing tank rotates in a reverse direction with respect to the pulsator. And the pulsator is provided with a driving control method of the washing machine, characterized in that for operating the washing machine in one direction simultaneous rotation mode in which the high-speed rotation in one direction at the same time.

At this time, the washing tank fixing mode is characterized in that the brake band is restrained with the gear housing and the coupling is fully raised to be coupled with the fixture so that the rotation of the lower dehydration shaft is restricted.                     

In addition, the washing tank reverse rotation mode is characterized in that the gear housing is released from the restraint of the brake band and the coupling is lowered by a predetermined distance so that the gear housing is not engaged with the rotor bushing instead of being engaged with the fixture.

Meanwhile, in the one-way simultaneous rotation mode, the gear housing is released from the restraint of the brake band and the coupling is completely lowered so that the coupling is simultaneously engaged with the outer circumferential surface of the rotor bushing engaged with the lower washing shaft and the outer circumferential surface of the lower dehydration shaft. It features.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings, FIGS. 2 to 4.

For reference, prior to describing the configuration of the present invention, in order to avoid duplication of description, the same reference numerals as those of the prior art will be referred to.

2 is a cross-sectional view showing the structure of a washing machine drive unit of the present invention, Figures 3a to 3c is a cross-sectional view for explaining the operation of the washing machine drive unit of the present invention, Figure 4 is a washing and washing in the washing machine to which the drive unit of the present invention is applied; A rinse and a diagram explaining the rotation direction of the pulsator and the washing tank during dehydration.

The present invention and the outer tank (11); A washing tub installed inside the outer tub 11; A tub base 12 fixed to the lower end of the outer tub 11; A bearing housing 13 fixed to the lower portion of the tub base 12; A fixture 28 installed to engage the gear of the coupling 26 on the lower surface of the bearing housing 13; A stator (15) fixed to the bearing housing (13); A rotor (16) rotatably installed outside the stator (15); A rotor housing 17 surrounding the outside of the rotor 16; A rotor bushing 18 installed at a center of the rotor housing 17 and having a lower washing shaft 21 penetrated therein; A lower washing shaft 21 and an upper washing shaft 23 which are directly connected to the rotor 16 and rotate together when the rotor 16 rotates; A lower dehydration shaft 25b installed outside the lower washing shaft 21; An upper dehydration shaft 25a installed outside the upper washing shaft 23; The gear housing 29 is installed between the upper dehydration shaft (25a) and the lower dehydration shaft (25b) and the gear train is installed in the gear housing (29) and is fixed when washing the lower washing shaft (21) Reduction device 22 to reduce the rotational speed of the transmission to the upper washing shaft (23); A brake band 30 installed on the outer circumferential surface of the gear housing 29 so as to restrain the gear housing 29 from being rotated or released to rotate, the outer circumferential surface of the lower dewatering shaft 25b and the outer circumferential surface of the rotor bushing 18. In accordance with the state of the ascending and fully raised, it is coupled with the fixture 28 to restrain the rotation of the lower dehydration shaft 25b, and in a state of not engaging with the rotor bushing 18 instead of falling from the engagement with the fixture 28 by descending a predetermined distance. The washing tank is reversely rotated so that the washing tank coupled to the upper dehydration shaft 25a rotates in the opposite direction with respect to the pulsator coupled to the upper washing shaft 23, and when fully lowered, the washing tank is engaged with the lower washing shaft 21. A coupling 26 meshing with the outer circumferential surface of the rotor bushing 18 and the outer circumferential surface of the lower dewatering shaft 25b to rotate the pulsator and the washing tub simultaneously in the same direction; It is configured to include.

The operation of the present invention configured as described above is as follows.

When washing and rinsing, the washing machine is operated in a washing tank fixed mode in which only the pulsator is stirred while the washing tank is fixed, or in a washing tank reverse rotation mode in which the washing tank rotates in a reverse direction with respect to the pulsator. At the same time, the washing machine is operated in the one-way simultaneous rotation mode which rotates at a high speed.

That is, in the washing tank fixing mode, the brake housing 30 restrains the gear housing 29 and the coupling 26 is fully lifted to be coupled to the fixture 28 to restrict the rotation of the lower dehydration shaft 25b. Proceeds from the state.

At this time, as summarized in FIG. 4, only the pulsator is agitated in both directions while the washing tank is fixed.

Next, in the washing tank reverse rotation mode, the gear housing 29 is released from the restraint of the brake band 30 and the coupling 26 is lowered by a predetermined distance, thereby releasing the engagement with the fastener 28, instead of the rotor bushing 18. Proceeds without being engaged.

At this time, by the action of the gear housing 29 constituting the deceleration device 22 and the gears therein, as shown in FIG. 4, the washing tank is reversely rotated opposite to the rotation direction of the pulsator.

In more detail, when the lower washing shaft 21 is rotated in one direction by receiving the power of the driving motor, the planetary gear unit 113 engaged with the main gear unit 112 rotates and rotates. Revolving along the fisherman 114, the idle of the planetary gear 113 is transmitted to the carrier disk 125 and the upper washing shaft 23 so that the upper washing shaft 23 is decelerated and the lower washing shaft 21 and It will rotate in the same direction. In addition, since the planetary gear unit 113 revolves, the internal gear unit 114 rotates in a direction opposite to the rotational direction of the lower washing shaft 21, so that the upper dewatering shaft 25a and the washing tank coupled thereto are upper. It is to rotate in the direction opposite to the rotation direction of the lower washing shaft (21, 23).

Meanwhile, prior to the operation as described above, the brake band 30 is spaced apart from the outer circumferential surface of the gear housing 29 so as not to restrict the rotation of the gear housing 29. The brake band 30 is a drain valve. It is operated by a two-stage operation motor (not shown) which opens (not shown).

That is, in the first stage operation of the two-stage operation motor, only the brake band 30 is spaced apart from the outer circumferential surface of the gear housing 29 without opening the drain valve so as to release the gear housing 29 to be rotatable.

In addition, in the one-way simultaneous rotation mode, the gear housing 29 is released from the restraint of the brake band 30 and the coupling 26 is completely lowered so that the coupling 26 is engaged with the lower washing shaft 21. It proceeds in the state engaged with the outer peripheral surface of the bushing 18 and the outer peripheral surface of the lower dehydration shaft 25b simultaneously.

That is, at this time, the two-stage operation motor is operated in two stages so that the brake band 30 is not only kept separated from the gear housing 29 but also the drain valve is opened. Likewise, the pulsator and the washing tank are rotated at the same time in one direction at a high speed, so that the laundry is dehydrated.

As described above, the present invention is to diversify the washing method and the flow of the washing water by washing the pulsator only or rotate the pulsator and the washing tank when the washing and rinsing in the direct-type washing machine, and the washing water flow is further activated washing The effect of improving performance can be obtained.

Accordingly, the present invention has the effect of improving the product reliability of the washing machine by improving the washing and rinsing performance and its efficiency.

Claims (9)

An outer tub installed in the washing machine body; A washing tub rotatably installed in the outer tub; A pulsator installed inside the washing tub; A dehydration shaft fixedly installed at the center of the lower end of the washing tank; An upper laundry shaft rotatably installed in the dehydration shaft and coupled to a pulsator and a lower laundry shaft coupled to a driving means; Drive means for generating power to rotate the lower laundry shaft; A coupling for selectively transmitting power of the drive means to the laundry shaft and / or the dehydration shaft; A deceleration device for reducing the rotational speed of the lower laundry shaft and transmitting the deceleration device to a pulsator; Washing tank fixing means for fixing the washing tank when the pulsator rotates; Washing tank reverse rotation means for rotating the washing tank in a direction opposite to the turning direction of the pulsator when the pulsator rotates; Washing machine characterized in that it comprises a one-way simultaneous rotation means for the pulsator and the washing tank to rotate in the same direction at the same time. The method of claim 1, The washing tank fixing means, A brake band installed on an outer circumferential surface of the gear housing constituting the power transmission unit and configured to restrain the gear housing from rotating; And a fastener fixed to the lower portion of the outer tub and engaged with a gear of the coupling when the coupling along the dehydration shaft is lifted. The method of claim 1, The washing tank reverse rotation means, A cycle fisherman formed on an upper end of the lower laundry shaft; A carrier disk which is fixedly coupled to a lower end of the upper laundry shaft and is provided with a plurality of planetary gear parts which mesh with the main gear part and rotate by rotation of the main gear part; And an internal gear unit integrally formed on an inner circumferential surface of the deshrinkable shaft and configured to engage with the planetary gear unit of the carrier disk. The method of claim 1, The one-way simultaneous rotation means for the pulsator and the washing tank to rotate in the same direction at the same time, And a rotor bushing coupled to the outer circumferential surface of the laundry shaft to engage the coupling with the dehydration shaft when the coupling along the dehydration shaft falls. External appearance; A washing tub rotatably installed in the outer tub; A tub base fixed to a lower end of the outer tub; A bearing housing fixed to the lower portion of the tub base; A fixture installed to engage the gear of the coupling with a lower surface of the bearing housing; A stator fixed to the bearing housing; A rotor rotatably installed outside the stator; A rotor housing surrounding an outer side of the rotor; A rotor bushing installed at a center of the rotor housing and having a lower washing shaft penetrated therein; A lower laundry shaft and an upper laundry shaft which are directly connected to the rotor and rotate together when the rotor is rotated; A lower dehydration shaft installed outside the lower laundry shaft and an upper dehydration shaft installed outside the upper laundry shaft; A reduction gear configured to include a gear housing installed between the upper dehydration shaft and the lower dehydration shaft and a gear train installed inside the gear housing, and fixed during washing to reduce the rotational speed of the lower washing shaft and to transfer the lower washing shaft to the upper washing shaft. ; A brake band installed on an outer circumferential surface of the gear housing to restrain the gear housing from rotating or to release the gear housing; Lifting along the lower dehydration outer circumferential surface and the rotor bushing outer circumferential surface and combined with the fixture when fully ascended to restrain the rotation of the lower dehydration shaft, and lower the predetermined distance to escape from engagement with the fixture, instead of engaging with the rotor bushing instead of upper washing Reverse the washing tub so that the washing tub attached to the upper dehydration shaft can rotate in the opposite direction with respect to the pulsator coupled to the shaft, and when fully lowered, simultaneously the outer circumference of the rotor bushing engaged with the lower washing shaft and the outer circumference of the lower dehydration shaft And a coupling to engage and rotate the pulsator and the washing tub simultaneously in the same direction. An outer tub, a washing tub installed inside the outer tub, a fixture installed at a lower portion of the outer tub, a stator fixed to the bearing housing, a rotor rotatably installed outside the stator, and a rotor housing surrounding the outer side of the rotor; A rotor bushing installed at the center of the rotor housing and having a lower washing shaft penetrated therein; a lower washing shaft and an upper washing shaft directly connected to the rotor and rotating together with the rotor when rotating; A deceleration device including a lower dehydration shaft installed and an upper dehydration shaft installed outside the upper laundry shaft, a gear housing provided between the upper dehydration shaft and a lower dehydration shaft, and a gear train provided therein; A brake band installed on an outer circumferential surface of the gear housing to restrain or release the gear housing; In the operation control method of a main surface or hayeoseo including coupling to the lifting rotor bushing along the outer peripheral surface direct-coupled type washing machine; When washing and rinsing, the washing machine is operated in at least one of a washing tank fixing mode in which only the pulsator is stirred while the washing tank is fixed, or a washing tank reverse rotation mode in which the washing tank rotates in a reverse direction with respect to the pulsator. Operating method of the washing machine, characterized in that for operating the washing machine in one-way simultaneous rotation mode in which the washing tank and the pulsator to rotate at the same time high speed in one direction. The method of claim 6, The washing tank fixing mode, The brake housing is constrained to the gear housing and the coupling is fully raised so that the coupling is coupled with the fixture so that the rotation of the lower dehydration shaft is restricted. The method of claim 6, The washing tank reverse rotation mode, And the gear housing is released from the restraint of the brake band and the coupling is lowered by a predetermined distance so that the gear housing proceeds without being engaged with the rotor bushing instead of being released from engagement with the fixture. The method of claim 6, The one-way simultaneous rotation mode is, The gear housing is released from the restraint of the brake band and the coupling is completely lowered so that the coupling proceeds while being engaged with the outer circumferential surface of the rotor bushing engaged with the lower washing shaft and the outer circumferential surface of the lower dehydration shaft. Control method of operation.

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