KR20040100532A - Amount of a laundry Sensing method for washing machine - Google Patents

Abstract

PURPOSE: A method for sensing the washing amount of a washing machine is provided to reduce the deviation in the number of pulse caused by the brake force of a brake fixing an inner tub and to reduce wear caused by repeated use of the brake, by enabling rotation of the inner tub in sensing the washing amount in a wash mode. CONSTITUTION: A method for sensing the washing amount of a washing machine comprises steps of connecting capacitors parallel to supply working power to a motor and increasing torque of the motor, in a dehydrating mode or a wash mode in which an inner tub is rotatable(S21); turning on/off the motor for a predetermined number of times to rotate the motor in a direction according to the increased torque(S22); counting the number of pulse produced by the residual electromotive force caused by the excess rotation of the motor when the motor is turned off while the motor is turned on/off(S23); turning on/off the motor for a predetermined number of times to make the motor rotate in a direction opposite to the direction of the second step(S24); counting the number of pulse produced by the residual electromotive force caused by the excess rotation of the motor when the motor is turned off while the motor is turned on/off(S25); and sensing the washing amount via the counted number of pulse(S26).

Description

Amount of a laundry Sensing method for washing machine}

The present invention relates to a method for detecting a quantity of washing machine, and in particular, by releasing the brake that fixes the inner tank when the quantity is detected in the washing mode so that the inner tank is rotatable, the occurrence of the deviation of the quantity detected by the brake force of the brake and the brake The present invention provides a method of detecting a quantity of washing machine, which can reduce wear and prevent the damage of laundry by making a quantity detection in a dehydration mode.

In addition, the present invention provides a method of detecting a quantity of a washing machine capable of improving the discrimination force according to the amount of quantity by increasing the torque of the motor when the quantity of the quantity is detected in the washing mode or the dehydration mode.

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.

Generally, a 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. ), A pulsator (8) rotatably installed on the inner bottom surface of the inner tub (6) to form a flow of water in the wash water, and the inner tub (6) and the pulsator (8) below the outer tub (4). It is installed to be connected to the inner tank 6 or the pulsator 8 is configured to include a motor (10) and a clutch (not shown).

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 transmitted to the washing shaft 8a to rotate the pulsator 8, while the dehydration mode operates the clutch in accordance with the operation of the clutch. The laundry 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.

At this time, in the washing mode, the inner tub 6 is bitten and fixed by a brake (not shown) so that only the pulsator 8 is rotated, whereas in the dehydration mode, the inner tub 6 is released with the brake to release the pulsette. It is rotated integrally with the eater (8).

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, in recent years, the washing stroke is performed by varying the torque of the motor 10 for driving the pulsator 8 so as to more effectively separate the stain on the laundry during the washing stroke. The motor 10 allows the torque to be varied by a plurality of capacitors to allow a constant driving voltage to be applied to the motor 10, and to increase the plurality of capacitors.

In addition, when the quantity of laundry is not detected correctly, it is important to accurately carry out a quantity detection operation because problems such as increased use quantity, reduced washing performance, increased damage, and detergent residues may occur.

FIG. 2 is a view illustrating a method of detecting a quantity of washing machine according to the related art. First, in the first step, the motor 10 is turned on / off for a set number of times so that the motor 10 rotates in one direction, and at the same time, the power supply when the motor 10 is turned off. Count the number of pulses generated by residual electromotive force due to rotation (see S11 and S12).

In the second step, the motor 10 turns on and off during the set number of times so that the motor 10 rotates in the opposite direction to the first step after the set number of times of the first step has elapsed, and when the motor 10 is turned off Count the number of pulses generated according to the residual electromotive force due to (see S13 and S14).

The third step detects the amount of dose according to the number of pulses counted in the first and second steps (see S15).

However, the method of detecting a quantity of washing machine according to the related art as described above allows the power of the motor 10 to be transmitted only to the pulsator 8 so that the inner tank 6 is fixed by the brake and the pulsator 8 is fixed. Since only the pulsator 8 is rotated in a state where the inner tank 6 is fixed, the laundry is damaged because the quantity of water is sensed in the washing mode to rotate only, and when the motor 10 rotates in the dehydration direction, the inner tank ( 6) is fixed but rotates in the opposite direction, the slip is generated and the amount of detection of the quantity is reduced, and the motor is generated according to the wear of the brake and the brake force of the brake due to repeated use of the brake. There is a problem in that it is difficult to accurately detect a dose because the variation in the number of pulses increases.

In addition, the motor 10 is operated through a capacitor connected to the motor 10. Since the capacity of the capacitor is small, the number of pulses generated by the motor is small, so that the discriminating force according to the quantity is reduced.

The present invention has been made to solve the above-mentioned problems of the prior art, the object of which is that the number of pulses due to the brake force of the brake to fix the inner tank by allowing it to be rotatable without fixing the inner tank when detecting the quantity in the washing mode The present invention provides a method of detecting a quantity of washing machine that can reduce the wear and reduce the wear caused by the repeated use of the brake.

In addition, to detect the amount of water in the dehydration mode to allow the pulsator and the inner tank is rotated integrally to provide a method for detecting the amount of washing of the washing machine that can prevent damage to the laundry by rotating only the pulsator in the washing mode.

In addition, in the washing mode and the dehydration mode, when detecting the amount of capacity when the operating power is applied to the motor by connecting a plurality of capacitors connected to the motor in parallel to increase the torque of the motor to increase the discrimination power for each amount of washing machine washing capacity To provide.

1 is a view showing the structure of a typical washing machine;

2 is a view illustrating a quantity detection method of a washing machine according to the related art;

3 is a view illustrating a quantity detection method of a washing machine according to the present invention;

4 is a view showing a plurality of capacitors for varying the torque of the motor at the time of detecting the amount of washing machine according to the present invention.

According to a first feature of the quantity detection method of the washing machine according to the present invention for solving the above problems, the number of pulses according to the rotation of the force when the motor is off at the same time while the motor is turned on / off for a set number of times to rotate in one direction in the dehydration mode A first step of counting and a number of pulses according to the force rotation when the motor is turned off while the motor is turned on / off for a set number of times such that the motor is rotated in a direction opposite to the first step after the set number of times of the first step has elapsed; And a third step of detecting a quantity according to the number of pulses counted in the first and second steps.

In addition, according to a second aspect of the method for detecting a quantity of washing machine according to the present invention, in the washing mode in which the inner tank is rotatable, the motor is turned on / off for a predetermined number of times so that the motor rotates in one direction, and at the same time, the pulse according to the rotation of the force when the motor is turned off. The first step in which the number is counted, and after the set number of the first step has elapsed, the motor is turned on / off for the set number of times so that the motor rotates in the opposite direction to the first step, and the number of pulses according to the force rotation when the motor is turned off is counted. And a third step of detecting a quantity according to the number of pulses counted in the first and second steps.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same components as in the prior art use the same reference numerals as in FIG. 1.

As shown in FIG. 3, in the washing machine according to the present invention, the power of the motor 10 is first transmitted to the pulsator 8 and the inner tank 6 in the first step. In a dehydration mode for allowing the inner tub 6 to rotate integrally or a washing mode in which the inner tub 6 is rotatable, a plurality of capacitors for connecting operating power to the motor 10 are connected in parallel to increase torque of the motor 10. To increase (see S21).

That is, as shown in FIG. 4, the plurality of capacitors C1 and C2 are connected in parallel to both ends of the motor 10 so that operating power can be applied to the motor 10, and the plurality of capacitors C1, A switch S is connected to some of the capacitors C1 of C2) so that the plurality of capacitors C1 and C2 are selectively connected in parallel. Accordingly, when the plurality of capacitors C1 and C2 are connected in parallel, the switch S is turned on. Otherwise, the switch S is turned off.

In the second step, the motor 10 is turned on / off for a set number of times so that the motor 10 rotates in one direction according to the increased torque in the first step.

The third step counts the number of pulses generated by residual electromotive force due to the rotation of the motor 10 when the motor 10 is off while the motor 10 is turned on / off in the second step. (See S23)

In the fourth step, the motor 10 is turned on / off for the set number of times such that the motor 10 is rotated in the opposite direction to the second step after the set number of times has elapsed (see S24).

The fifth step counts the number of pulses generated by residual electromotive force due to the rotation of the motor 10 when the motor 10 is off while the motor 10 is on / off in the fourth step. (See S25)

The sixth step detects the amount of dose through the number of pulses counted in the third and fifth steps (see S26).

In this case, the dose is detected according to the dose calculation data according to the number of pre-stored pulses.

As a result, when the amount of water is detected in the dehydration mode, the pulsator 8 and the inner tank 6 rotate together when the amount of water is detected, thereby preventing damage to the laundry.

On the other hand, when the power of the motor 10 is transmitted only to the pulsator (8), the inner tank (6) detects the amount of capacity in the washing mode to rotate only the pulsator (8) in a rotatable state In particular, since the inner tank 6 is rotatable by releasing the brake for fixing the inner tank 6 not to rotate, the deviation of the number of pulses generated in the motor 10 may be reduced by the brake force of the brake. As well as being able to reduce the wear caused by the repeated use of the brake.

In addition, even when detecting the amount of water in the washing mode, the amount of water is detected through the same process as the amount of water in the dehydration mode.

In addition, the torque of the motor 10 may be increased by allowing a plurality of capacitors for driving the motor 10 to be connected in parallel when the quantity of water is detected in the washing mode in which the dehydration mode or the inner tank 6 is rotatable. Since the number of pulses generated through the residual electromotive force due to the rotation of the force when the motor 10 is off may be increased, the difference in the number of pulses per quantity may be increased, thereby improving the quantity discriminating power.

The quantity detection method of the washing machine according to the present invention configured as described above is to increase the torque of the motor in the dehydration mode to rotate the pulsator and the inner tank integrally to increase the number of pulses generated in the motor to improve the discrimination power for each quantity At the same time, since the pulsator and the inner tank are rotated integrally, there is an effect of preventing damage to the laundry.

In addition, in the washing mode in which only the pulsator is rotated, the brake that releases the inner tank is released so that the inner tank is rotatable so that the deviation of the number of pulses generated in the motor may be reduced by the brake force of the brake. It is possible to reduce the wear of the brakes due to the repeated use of the brave, and at the same time by allowing a plurality of capacitors connected in parallel to allow the operating power to be applied to the motor when detecting the amount of capacity in the washing mode in which the inner tank is rotatable, As the torque of the motor is increased, there is an effect that the capacity discrimination force can be improved as in the dehydration mode.

Claims (3)

A first step of turning on / off for a predetermined number of times so that the motor rotates in one direction in the dehydration mode and counting the number of pulses according to the rotation of the force when the motor is off; A second step of turning on / off the set number of times so that the motor rotates in the opposite direction to the first step after the set number of times of the first step and counting the number of pulses according to the rotation of the force when the motor is turned off; And a third step of detecting a quantity according to the number of pulses counted in the first and second steps. A first step of turning on / off a set number of times so that the motor rotates in one direction in the washing mode in which the inner tank is rotatable, and counting the number of pulses according to the rotation of the force when the motor is turned off; A second step of turning on / off the set number of times so that the motor rotates in the opposite direction to the first step after the set number of times of the first step and counting the number of pulses according to the rotation of the force when the motor is turned off; And a third step of detecting a quantity according to the number of pulses counted in the first and second steps. The method according to claim 1 or 2, The motor is a capacity detection method of the washing machine, characterized in that a plurality of capacitors are connected in parallel so that the operating power is applied to the motor so that the torque increases when rotating.