KR20060020266A - Washing machine and the controlling method of the machine - Google Patents

Abstract

The present invention relates to a washing machine, and more particularly, to a washing machine and a control method thereof, in which a reduction gear and a clutch are not installed, the structure is simple, and the washing capacity can be increased.

To this end, the present invention, the tub 12 is rotatably installed in the interior of the tub (11); A pulsator 13 rotatably installed in the inner tub 12; A first washing shaft 14 penetrating through the tub 11 and connected to the inner tub 12; A second washing shaft 15 inserted into the first washing shaft 14 and connected to the pulsator 13; In addition, a double rotor motor connected to the first washing shaft 14 and the second washing shaft 15 and wound so as to rotate the first washing shaft 14 and the second washing shaft 15 separately ( 20): Provides a washing machine configured to include.

Washing machine, double rotor motor

Description

Washing machine and the controlling method of the machine}

1 is a configuration diagram schematically showing the configuration of a washing machine according to the present invention.

Figure 2 is an operating state diagram showing the action during the washing administration of the washing machine of Figure 1;

3 is an operating state diagram showing the action of the washing machine of the washing machine of FIG.

Explanation of symbols on the main parts of the drawings

11: Tub 12: inner tide

13: pulsator 14: first washing axis

15 second washing shaft 16 bearing

20: double rotor motor 21: stator

21a: core 21b: inner winding

21c: outer winding 22: inner rotor

22a: core 23: outer rotor

23a: core

The present invention relates to a washing machine, and more particularly, to a washing machine and a control method thereof, in which a reducer and a clutch are not installed, the structure is simple, the manufacturing cost is reduced, and the washing capacity can be increased.

A general washing machine is a device for washing laundry by the action of the water flow of the wash water and the chemical action of the detergent.

Such a washing machine is classified into a top load type washing machine and a front load type washing machine. The top load type washing machine includes a circulator and a pulsator washing machine, and the front load type washing machine includes a drum washing machine.

The pulsator washing machine is provided with an inner tub and a pulsator so as to be rotatable inside the outer tub, and the inner tub and the pulsator are connected to the driving unit.

The drive unit comprises a laundry shaft and a motor device.

The driving unit may apply an indirect driving method for rotating the drum by transmitting the driving force generated from the motor to the washing shaft by the belt, or apply the direct driving method for rotating the drum by directly transmitting the driving force generated from the motor to the washing shaft. It may be.

When the direct drive method is applied, the washing shaft is provided with a reducer and a clutch to reduce the number of revolutions of the inner tank to wash and dehydrate the laundry. In addition, a separate driver may be installed to accelerate and decelerate the motor device.

However, the conventional washing machine has the following problems.

First, since the reducer and the clutch are installed in the drive unit of the direct drive system to implement the washing stroke and the dehydration stroke, the structure of the drive unit is complicated and the manufacturing cost is also increased. In addition, since the installation space of the drive unit is greatly required, there is a problem that the capacity of the inner tank is relatively reduced.

Second, there is a problem in that noise is greatly generated when a plurality of gears are engaged in the reducer and when the clutch is changed.

Third, although a separate driver may be installed for acceleration and deceleration of the motor in the direct drive type drive unit, the manufacturing cost of the washing machine increases significantly when the driver is applied.

In order to solve the above problems, the present invention relates to a washing machine that is not provided with a reducer and a clutch, the structure is simple, the manufacturing cost is reduced, and the washing capacity can be increased.

In order to achieve the above object, an embodiment according to the present invention is an inner tub rotatably installed in the tub; A pulsator rotatably installed in the inner tank; A first washing shaft penetrating the tub and connected to the inner tub; A second washing shaft inserted into the first washing shaft and connected to the pulsator; And, it provides a washing machine comprising a double rotor motor: connected to the first washing shaft and the second washing shaft, and wound to rotate the first washing shaft and the second washing shaft separately.

The dual rotor motor, the stator is fixed to the outer tub so as to surround the first washing shaft, the inner winding portion and the outer winding portion is installed in the core; An inner rotor fixed to the first laundry shaft to correspond to the inner winding part; In addition, the rotation center is connected to the second washing shaft and an outer rotor which is installed to correspond to the outer winding portion is configured to include.

Such a double rotor boat may be an induction motor or a brushless motor.

According to another embodiment of the present invention, the power supply is applied to the inner winding portion and the outer winding portion during the washing stroke to rotate the inner rotor and the outer rotor in different directions. Provided is a control method of a washing machine according to claim 1 for rotating the inner rotor and the outer rotor in the same direction.

It is preferable to rotate the inner rotor at a higher speed than the outer rotor at the washing stroke, and to rotate the inner rotor and the outer rotor at the same speed during the dehydration stroke.

Hereinafter, an embodiment of a washing machine according to the present invention will be described with reference to FIGS. 1 to 3.

1 is a configuration diagram schematically showing the configuration of a washing machine according to the present invention, Figure 2 is an operational state diagram showing the action of the washing machine of the washing machine of Figure 1, Figure 3 is the action of the washing machine of the washing machine of Figure 1 The operation state diagram which shows.

Referring to FIG. 1, the washing machine includes an inner tub 12 rotatably installed in the tub 11, a pulsator 13 rotatably installed in the tub 12, and the tub 11. The first washing shaft 14 is connected to the inner tub 12 through the) and the second washing shaft 15 is inserted into the first washing shaft 14 and connected to the pulsator 13. And a double rotor motor connected to the first washing shaft 14 and the second washing shaft 15 and wound to rotate the first washing shaft 14 and the second washing shaft 15 separately. 20).

The double rotor motor 20 includes a stator 21, an inner rotor 22, and an outer rotor 23.

The stator 21 is fixed to the outer tub to surround the first washing shaft 14. The stator is provided with an inner winding portion 21b and an outer winding portion 21c in the core 21a.

In this case, the inner winding portion and the outer winding portion may be wound at the same turns ratio. For example, the turns ratio of the main winding of the inner winding portion and the main winding of the outer winding portion can be the same. At this time, the winding ratio of the main winding and the auxiliary winding in each winding part should be properly designed.

In addition, the inner winding portion and the outer winding portion may be wound at different turns ratios. For example, the winding ratio of the main winding of the inner winding portion and the winding of the outer winding portion is formed differently. At this time, the winding ratio of the main winding and the auxiliary winding in each winding part should be properly designed.

In more detail, such a double rotor motor, the stator 21 is formed in an annular shape as a whole. The stator 21 is composed of a stator core 21a in which iron cores are stacked, and an inner and outer winding part 21c in which coils are wound around the stator 21 core 21a. At this time, the inner winding 21b is installed inside the stator 21, and the outer winding 21c is installed outside the stator 21.

In addition, the inner rotor 22 is fixed to the first washing shaft 14 to correspond to the inner winding portion 21b of the stator 21, and the outer rotor 23 is attached to the second washing shaft 15. The center of rotation is connected and is installed to correspond to the outer winding 21c.

The dual rotor motor 20 applies an induction motor in which rotational force is generated by interaction between a rotating magnetic field generated by a current flowing in the stator winding part and an induced current generated in the core of the rotor. In addition, the dual rotor motor may be applied to a brushless motor (rotational force) is generated by the magnetic force generated in the winding portion of the stator and the magnet of the rotor.

As an example of the induction motor, as shown in FIG. 1, the inner and outer winding portions 21b and 21c are wound around the core 21a of the stator in a distribution range, and the inner winding portion is surrounded by an edge of the inner rotor. The rotor core is installed to correspond to the 21b, and the rotor core 23a is installed on the edge of the outer rotor 23 so as to correspond to the outer winding 21c.

The induction motor controls the rotational speed of the inner rotor 22 and the outer rotor 23 through on / off control or phase control.

For example, although not shown, the inner and outer windings of the brushless motor are wound around the core of the stator in a concentrated zone, and the magnets of the N and S poles correspond to the inner windings on the edge of the inner rotor. Are alternately installed, and magnets of the N pole and the S pole are alternately installed to correspond to the outer winding portion on the edge of the outer rotor. The brushless motor controls the rotational speed of the inner and outer rotors by the control of a separately installed drive. The drive is provided with a rectifying circuit, which uses a hall sensor to detect where the rotor is located and controls the electronic circuit based on this signal to generate a rotating magnetic field. This rectifier circuit is a dedicated integrated circuit (IC).

It is understood that the double rotor motor may have different poles and phase numbers and a winding method according to the capacity and design of the washing machine. In addition, the stator is preferably formed so as not to be electromagnetically affected between the inner winding portion and the outer winding portion.

On the other hand, it is preferable that a bearing is installed to rotatably support the first washing shaft 14 and the second washing shaft 15. For example, the bearing is installed between the first washing shaft 14, the second washing shaft 15 and the tub 11, respectively. Accordingly, the first and second laundry shafts can be individually rotated as the inner rotor 22 or / and the outer rotor 23 are rotated.

In this case, in order to prevent the wash water contained in the tub from leaking, it is preferable to form a structure capable of sealing a gap between the bearings.

An operation control method of the washing machine configured as described above will be described.

At the washing stroke, power is applied to the inner winding part 21b and the outer winding part 21c to rotate the inner rotor 22 and the outer rotor 23 in different directions (see FIG. 2). At this time, it is preferable that the inner rotor 22 is rotated at a relatively high speed compared to the outer rotor 23.

At this time, during the washing stroke, it is preferable to alternate the inner rotor and the outer rotor 23 periodically.

In addition, during dehydration, power is applied to the inner winding portion 21b and the outer winding portion 21c to rotate the inner rotor 22 and the outer rotor 23 in the same direction (see FIG. 3). The inner rotor 22 and the outer rotor 23 are preferably rotated at the same speed.

At this time, the two rotors during the dehydration stroke is rotated at a relatively high speed than when washing.

The washing machine selectively or collectively performs washing, draining, dehydrating, and rinsing according to a selection.

When the washing stroke is started, power is applied to the double rotor motor 20.

When the double rotor motor 20 is an induction motor, the rotating magnetic field, the inner rotor 22 and the outer rotor are caused by a current flowing through the inner winding portion 21b and the outer winding portion 21c of the stator 21. The driving force is generated by interaction with the induced electromotive force generated in the core 23a of 23.

Alternatively, when the double rotor motor 20 is a brushless motor, the rectifier circuit of the drive detects the position of the rotor by a hall sensor and generates a rotating magnetic field by controlling the electronic circuit based on the signal. do.

At this time, the inner rotor 22 and the outer rotor 23 are rotated in the opposite direction as shown in FIG. This inner rotor 22 is operated at a relatively low speed compared to the outer rotor 23. In addition, the two rotors are rotated periodically.

The driving force of the inner rotor 22 is transmitted to the inner tank through the first washing shaft 14, and at the same time, the driving force of the outer rotor 23 is transmitted to the pulsator 13 through the second washing shaft 15. do. At this time, the bearings provided between the first and second laundry shafts enable each laundry shaft to be individually rotated.

Subsequently, the first washing shaft 14 rotates the inner tank at a relatively high speed, and the second washing shaft 15 rotates the pulsator 13 at a relatively low speed.

In this way, as the inner tank and the pulsator are rotated in the opposite direction and rotated alternately, water flow can be more rapidly formed to improve washing power of the laundry.

When this washing administration is finished, the draining stroke is then started, and after the washing water is drained, the dehydrating stroke is started.

When the dehydration stroke is started, power is applied to the double rotor motor 20.

The inner rotor 22 and the outer rotor 23 are rotated at the same time. At this time, the two rotors are rotated at the same speed. In addition, the inner rotor and the outer rotor are rotated at a relatively high speed compared to the washing stroke.

The driving force of the inner rotor 22 is transmitted to the inner tank through the first washing shaft 14, and at the same time, the driving force of the outer rotor 23 is transmitted to the pulsator 13 through the second washing shaft 15. do.

Subsequently, the first and second laundry shafts 14 and 15 rotate the inner tank and the pulsator at the same speed. At this time, the inner tank and the pulsator is rotated at a relatively high speed compared to the washing stroke. Therefore, the wash water contained in the laundry is drained after being dewatered from the laundry.

Thus, the present invention by rotating the inner tank and the pulsator by the double rotor motor, it is possible to perform the washing stroke and dehydration stroke without a separate deceleration device or clutch.

As described above, the washing machine according to the present invention has the following effects.

First, since the washing machine applies a double rotor motor, washing and dehydrating strokes can be performed without a separate reduction device and a clutch. Therefore, it is easy to control the speed of the inner tank and the pulsator.

Second, since there is no need to install the deceleration device and the clutch, the structure of the driving unit is simplified, the installation space is relatively reduced, and manufacturing cost and repair cost are also reduced. In addition, the washing capacity can be increased.

Third, there is an effect that can fundamentally solve the mechanical noise generated when the deceleration device and the clutch is operated.

Claims (7)

An inner tub rotatably installed in the tub; A pulsator rotatably installed in the inner tank; A first washing shaft penetrating the tub and connected to the inner tub; A second washing shaft inserted into the first washing shaft and connected to the pulsator; And, And a double rotor motor connected to the first laundry shaft and the second laundry shaft, the dual rotor motor being wound to rotate the first laundry shaft and the second laundry shaft separately. The method of claim 1, The double rotor motor is: A stator fixed to an outer tub to surround the first laundry shaft and having an inner winding portion and an outer winding portion installed at a core thereof; An inner rotor fixed to the first laundry shaft to correspond to the inner winding part; And, An outer rotor is installed to correspond to the outer winding and the rotation center is connected to the second washing shaft, characterized in that the washing machine comprising a. The method of claim 2, The dual rotor motor is a washing machine, characterized in that the induction motor or brushless motor. The method of claim 2, Washing machine, characterized in that the bearing is installed between the first washing shaft, the second washing shaft and the tub, respectively. When washing, apply power to the inner winding and outer winding to rotate the inner rotor and the outer rotor in different directions, The control method of the washing machine according to claim 2, wherein the inner rotor and the outer rotor are rotated in the same direction by applying power to the inner winding and the outer winding. The method of claim 5, At the washing stroke, the inner rotor is rotated at a higher speed than the outer rotor, The control method of the washing machine according to claim 2, wherein during the dehydration operation, the inner rotor and the outer rotor are rotated at the same speed. The method of claim 6, The washing method according to claim 2, wherein during the washing operation, the inner rotor and the outer rotor are alternated.

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