KR100653764B1 - Mode change method of a washer - Google Patents

Abstract

The present invention relates to a mode switching method of a washing machine in which the power of the motor is switched to the dehydration mode in which the power of the motor is simultaneously transmitted to the pulsator and the inner tank in the washing mode in which the power of the motor is transmitted only to the pulsator. And a second step in which the power of the motor is turned off when the setting mode is changed from the washing mode of the first step to the dehydration mode, and when the power of the motor in the second step is turned off. Washing mode consisting of a third step of determining the operating state of the motor through the number of pulses generated during the rotation of the force, and a fourth step of stopping the motor and changing to the dehydration mode according to the determination result of the third step In addition to reducing the noise generated when the mode is switched to stop the motor that is operating in There is an advantage to increase the reliability of the operation.

Washing machine, Outer tank, Inner tank, Pulsator, Dewatering, Washing shaft, Motor, Clutch, Clutch motor, Washing mode, Dewatering mode, Coupling

Description

Mode change method of washing machine {Mode change method of a washer}             

1 is a side cross-sectional view showing a typical washing machine,

2 is a flowchart illustrating a mode switching method of a washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

2: cabinet 4: outer tub

6: inner tank 6a: deshrink

8: pulsator 8a: laundry shaft

10: motor

The present invention relates to a mode switching method of a washing machine that is switched to a dehydration mode in which the power of the motor is simultaneously transmitted to the pulsator and the inner tank in the washing mode in which the power of the motor is transmitted only to the pulsator. This is a method of changing the mode of the washing machine to increase the noise and operation reliability by allowing the mode to be switched after the stop.

In general, a washing machine is a machine that removes stains on clothing by providing a mechanical action using electricity.When it is put on clothing, it is removed from the fibers by the chemical action of detergent when put in the washing liquid, Because it takes time, if the water flow is forcibly generated and mechanical action such as friction or vibration can be removed quickly and easily.

1 is a side cross-sectional view showing a general washing machine.

A general washing machine includes an outer tub 4 installed to hang inside a cabinet 2 forming an exterior as shown in FIG. 1, and an inner tub 6 rotatably installed inside the tub 4 to wash laundry. And a pulsator (8) rotatably installed on the inner bottom surface of the inner tub (6) to form a rotary flow in the wash water, and the inner tub (6) and the pulsator (8) below the outer tub (4). It is configured to include a motor (10) and a clutch (not shown) installed to be connected to rotate the inner tank (6) or pulsator (8).

Here, the inner tank 6 is connected to the hollow dehydration shaft (6a) at the bottom, the pulsator (8) is connected to the washing shaft (8a) rotatably installed in the dehydration shaft (6a) at the lower end The dewatering shaft 6a and the washing shaft 8a are bitten or released from each other according to the operation of the clutch.

Of course, the power of the motor 10 is decelerated while passing through the clutch in the washing mode and is transmitted to the washing shaft 8a to rotate the pulsator 8, while the dehydration mode causes the clutch to operate. The washing shaft 8a and the dehydration shaft 6a are bitten so that the pulsator 8 and the inner tank 6 can be rotated at the same time.

Specifically, the laundry shaft 8a and the dehydration shaft 6a are in a state where the coupling is released when the clutch motor (not shown) inside the clutch is operated, and the bite is released. When the clutch motor is stopped, the coupler is coupled. It is ringed and bitten.

Accordingly, when the motor 10 and the clutch motor are operated at the same time, the power of the motor 10 is transmitted only to the washing shaft 8a to maintain the washing mode in which only the pulsator 8 is rotated. Even when the motor 10 is operated, when the clutch motor is stopped, the power of the motor 10 is transmitted to the washing shaft 8a and the dewatering shaft 6a, so that the pulsator 8 and the inner tank 6 are simultaneously held. Maintain a spinning dehydration mode.

Usually, the washing mode is applied at the dose detection or normal washing and rinsing stroke, and the dewatering mode is applied at the centrifugal laundering or dewatering stroke, and this mode switching is made by the clutch.

In particular, the motor 10 is not only able to detect the operating state of the motor in itself, but also a lot of BLDC motor that is capable of electric braking is used, but such BLDC motor has been recently used induction motor because of the high price. .

However, since the induction motor does not sense the operating state of the motor in itself, and the electric braking is impossible, the induction motor is operated for a predetermined time by the power of the induction motor when the power of the induction motor is turned off. .

Therefore, even when the motor 10 is stopped in the washing machine to which the induction motor is applied as described above, when the mode is switched from the washing mode to the dehydration mode in the state in which the motor 10 is rotated by the power of the motor 10. As the clutch motor is operated, mechanical noise is generated because the washing shaft 8a and the dewatering shaft 6a are coupled to each other, and the washing shaft 8a and the dewatering shaft 6a are correctly coupled. There is a problem in that the operation reliability is low.

In addition, in order to solve the above problems, when the motor 10 is completely stopped and then the washing shaft 8a and the dewatering shaft 6a are coupled, there is a problem in that the mode switching time is long.

The present invention has been made to solve the above-mentioned problems of the prior art, and when the mode is switched to quickly stop the motor according to the operating state of the motor and then the mode is switched to increase the noise and operation reliability while reducing the mode switching time The purpose is to provide a mode switching method of the washing machine that can be made.

The mode switching method of the washing machine according to the present invention for solving the above problems is the first step of operating the motor in the washing mode, the power supply of the motor when the setting mode is changed from the washing mode of the first step to the dehydration mode A third step of turning off the motor, and a third step of determining an operating state of the motor based on the number of pulses generated when the motor rotates when the power of the motor is turned off; The fourth step of stopping the motor and changing to the dehydration mode according to the determination result of the.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating a mode switching method of a washing machine according to the present invention.

The mode switching method of the washing machine according to the present invention will be described with reference to FIG. 2.

In the first step, when the washing machine is operated, the washing mode is set at the same time and the mode is stored (see S1 and S2).

Here, when the user operates the washing machine, the washing shaft 8a and the dewatering shaft 6a are set to the washing mode in which the coupling is released and the bite is released. EEPROM).

In this case, reference numerals not shown will be described with reference to FIG. 1.

In the second step, the power of the motor 10 is turned on so that the motor 10 is rotated according to a program previously input in the washing mode of the first step, and a quantity detection, washing, and rinsing process are performed. See S4)

Specifically, in the washing mode, the quantity detection, washing and rinsing are performed. The quantity detection causes the power of the motor 10 to be turned on / off so that the motor 10 rotates in the forward and reverse directions. 10 is sensed according to the number of pulses generated in the motor 10.

In addition, the washing and rinsing stroke causes the power of the motor 10 to be turned on so that the power of the motor 10 is rotated along the washing shaft 8a as the motor 10 is rotated in the forward or reverse direction. It is delivered to the data (8) side is made while forming a rotational water flow inside the inner tank (6).

In the third stage, a mode is set during the quantity detection, washing and rinsing stroke of the second stage, and the power of the motor 10 is turned off (see S5 and S6).

In this way, the mode is set according to the stored program during the volume detection, the washing and the rinsing stroke, or the mode is reset by the user's operation. The power of the motor 10 is turned off every time the mode is set. .

In the fourth step, if the setting mode of the third step and the storage mode of the first step are different from each other, the number of pulses P of the motor 10 is counted (see S7 and S8).

Here, in the mode, the power of the motor 10 is transmitted only to the washing shaft 8a in a state in which the washing shaft 8a and the dehydrating shaft 6a do not bite each other, thereby rotating only the pulsator 8. In the washing mode and the state in which the washing shaft 8a and the dehydrating shaft 6a are bitten with each other, the power of the motor 10 is transmitted to the washing shaft 8a and the dewatering shaft 6a so that the pulsator 8 ) And the inner tank (6) is divided into a dehydration mode to rotate at the same time.

At this time, the setting mode is a dehydration mode because it is different from the storage mode of the laundry mode.

The number of pulses of the motor 10 is counted when the magnitude of the pulses generated by the motor 10 is greater than or equal to a predetermined value as the motor 10 rotates in one direction due to the force of the motor 10. By doing so, it is possible to determine the magnitude of the force of the motor 10.

In the fifth step, when the number P of the pulses counted in the fourth step is less than the first set number P1, it is determined that the motor 10 is stopped (see S9 and S10).

Of course, the determination that the motor 10 is stopped means that the motor 10 is completely stopped, or that the motor 10 is immediately stopped even if the motor 10 is rotated.

In the sixth step, when the motor is stopped in the fifth step, the mode is switched to the setting mode (see S11).

That is, since the mode is switched when the motor 10 is completely stopped when changing from the washing mode to the dehydration mode, the washing shaft 8a and the dehydrating shaft 6a are in the state in which the washing shaft 8a is stopped. Are coupled to each other.

Here, in the dehydration mode, centrifugal washing and dehydration are performed. Specifically, the centrifugal washing is stirred in the forward / reverse direction while the laundry shaft 8a and the dehydration shaft 6a are bitten together during a washing stroke. The washing water rises along the wall of the outer tub 4 by the centrifugal force of the inner tub 6 and hits the tub cover 4a installed on the upper tub 4 so as to be sprayed to the upper side of the inner tub 6 again.

In addition, the dewatering stroke is rotated at a high speed in one direction while the washing shaft 8a and the dehydrating shaft 6a are bitten each other, and the washing water flows from the laundry inside the inner tub 6 toward the outer tub 4 by centrifugal force. It is done by going out.

On the other hand, when the number P of pulses is greater than or equal to the first predetermined number of times P1 in the fifth step, when the number P of pulses is less than the second set number of times P2 in the seventh step, the motor is low speed. It is determined that the motor is rotated, and the motor 10 waits in the OFF state for the set time T (see S12, S13, and S14).

That is, when the number P of pulses is equal to or greater than the first predetermined number of times P1 and less than the second predetermined number of times P2, it is determined that the motor 10 is rotated at low speed by the force. The motor 10 is waited in the off state for the set time (T).

In this case, the set time (T) is a time taken for the motor 10 to be completely stopped by the rotation force, and may be set differently according to the operation state during the quantity detection, washing and rinsing stroke of the motor 10. have.

On the other hand, when the number P of pulses is greater than or equal to the second predetermined number P2 in the seventh step, it is determined that the motor 10 is rotated at high speed by the remaining power in the eighth step, and the motor 10 ) Is braked in the opposite direction to the force (see S15, S16).

Here, the power of the motor 10 for a predetermined number of times so that the motor 10 is rotated in the opposite direction to the power of the motor 10 in a state in which the motor 10 is turned off by the force even when the power of the motor 10 is turned off Since it is on / off, the power of the motor 10 is canceled so that the motor 10 is completely stopped. That is, the power applied to the motor is reversely applied such that the motor 10 is rotated in the opposite direction to the direction in which the motor is rotated by the force, and the power is turned on / off for a set number of times so that the rotation of the motor is stopped. do.

As described above, when it is determined that the motor 10 is rotated by the force as in the seventh and eighth steps, the motor 10 waits at low speed while the motor 10 brakes at high speed. Since the motor 10 is completely stopped and then converted to the setting mode, the mode change time can be shortened.

Since the mode switching method of the washing machine according to the present invention configured as described above determines the operating state of the motor according to the number of pulses generated by the power of the motor during mode switching, and accordingly stops the motor and then switches the mode. When the washing shaft and the dehydration shaft are coupled during the mode switching, the mechanical noise can be eliminated, and the coupling between the washing shaft and the dehydration shaft is possible because the motor is completely stopped and the laundry shaft and the dehydration shaft are stopped when the mode is switched. This accuracy has the advantage of increasing operational reliability.

In addition, if the motor is stopped during mode switching, the mode is changed immediately, or if the motor is rotated by the power of the motor, the motor is completely stopped by stopping or stopping the motor quickly, and then the mode is changed. There is an advantage that can be shortened.

Claims (9)

The first step of operating the motor in the washing mode, A second step of turning off the power of the motor when the setting mode is changed from the washing mode of the first step to the dehydration mode; A third step of determining an operating state of the motor based on the number of pulses generated when the motor power is turned when the power of the motor is turned off; And a fourth step of stopping the motor and changing to a dehydration mode according to the determination result of the third step. The method of claim 1, And in the third step, the number of pulses of the motor is counted when its magnitude is greater than or equal to a set value. The method of claim 2, In the third step, when the number of pulses P of the motor is less than the first set number P1 (P <P1), the motor is determined to be stopped, and the number of pulses P is the first set number ( P1) or more (P1? P) mode switching method of the washing machine, characterized in that it is determined that the motor is rotated. The method of claim 3, wherein In the third step, when the number of pulses P is greater than or equal to the first predetermined number of times P1 and less than a second predetermined number of times P2 (P1 ≦ P <P2), it is determined that the motor is rotated at a low speed. When the number (P) is greater than or equal to the second set number of times (P2) (P2 ≤ P) mode switching method of the washing machine, characterized in that the motor is determined to rotate at high speed. The method of claim 3, wherein The fourth step is a mode switching method of the washing machine, characterized in that the switch to the dehydration mode when it is determined in the third step that the motor is stopped. The method of claim 4, wherein The fourth step is a mode switching method of the washing machine, characterized in that the switch to the dehydration mode after waiting for the set time (T) when the motor is determined to rotate at a low speed in the third step. The method of claim 6, The setting time T of the fourth step is a time taken for the motor to stop. The method of claim 4, wherein In the fourth step, when it is determined that the motor is rotated at a high speed in the third step, the motor is rotated in a direction opposite to the rotation direction of the motor in the first step so that the rotation of the motor is stopped and then dewatered. Mode switching method of the washing machine characterized in that the mode is switched. The method of claim 8, In the fourth step, the braking of the motor is switched on or off for a predetermined number of times, so that power is applied to the motor so that the motor rotates in a direction opposite to the motor rotation direction of the first step. Way.

Images