KR19990055473A - Dehydration Control Method of Drum Washing Machine - Google Patents

Abstract

The dehydration control method of the drum washing machine to prevent the dehydration efficiency is reduced by minimizing the vibration generated during dehydration. In the dehydration control method of the drum washing machine, the first rpm according to the biased state of the laundry cloth to enter the dehydration stroke It comprises the step of setting, reducing or increasing the first rpm within a predetermined range by rotating the motor and measuring the amount of vibration accordingly, comprising the step of dehydrating at the rpm corresponding to the lowest value of the measured vibration amount Therefore, noise and dehydration performance can be prevented.

Description

Dehydration Control Method of Drum Washing Machine

The present invention relates to a washing machine, and more particularly, to a dehydration control method of a drum washing machine.

In general, a washing machine is a machine for washing laundry by performing washing, rinsing, and dehydrating strokes according to a set algorithm. The washing machine is classified into a pulsator type, a stirring type, a drum type, and the like according to a washing method.

At this time, the drum washing machine has been widely used, with the advantage of lowering the damage rate of laundry and the lowest use quantity, compared to other types of washing machines. As shown in FIG. 1, a damper (not shown) inside the main body 1 and the main body 1 is shown. Tub (2) fixed by the (2), the laundry into the tub (2), the drum (3), the drum (3) which is rotated by receiving the driving force of the motor (10) through the belt (11) to rotate 3) The thermistor (4) for measuring the temperature of the washing water supplied to the detergent, the detergent container (5) for the input of the detergent, connected to the detergent container (5) to supply the wash water or the washing water mixed with the detergent of the detergent container (5) Water supply pipe (6) for drainage, a drain pipe (7) for discharging the washing water used in the washing stroke to the outside, a pump (8) and a drain hose (9) for forcibly pumping the washing water connected to the end of the drain pipe (7) It is configured to include.

And when looking at the operation of the drum washing machine configured as described above, first the user opens the door (not shown) attached to the front of the main body 1, put the laundry and then input the washing command, the wash water through the water supply pipe (5) Guided by (6), it is filled in the drum (7). Subsequently, the water level sensor (not shown) detects that the washing water is filled by the set water level corresponding to the loaded laundry, and outputs the detected value to the controller. The control unit recognizes the completion of water supply according to the detected value and drives the motor 10 to rotate the drum 3 to proceed with washing.

On the other hand, when the washing is completed, the pump 8 is operated so that the washing water is drained to the outside via the drain pipe 7 and the drain hose 9, and when the draining is completed, the rinsing and dehydrating stroke are continuously performed, and the washing administration is finished. do.

At this time, the drum washing machine, like other types of washing machines, when the laundry is debalanced in one side of the drum when the laundry is debalanced, the drum washing machine hits the tub in the initial stage of the drum and cannot rotate at a normal speed, making it almost impossible to spin off. Noise may occur.

The drum washing machine according to the prior art first, the user opens the door of the drum washing machine (not shown), put the laundry, and then input the washing instruction through the control panel. Therefore, the control unit applies a control signal to each unit to correspond to the washing instruction. Subsequently, the washing motor, various valves, etc. are driven by receiving the control signal of the controller to sequentially perform washing and rinsing.

And when the rinsing cycle is finished, it enters the dehydration stroke.

At this time, as shown in Fig. 2, the dehydration stroke detects the deflection condition of the gun at 100 rpm, and if the deflection condition is not severe, that is, not enough to perform the dehydration operation, the rpm is increased to correspond to the deflection condition. Dehydration proceeds at the set rpm.

Then, when dehydration is completed, the administration before washing is terminated.

The drum washing machine according to the related art maintains the set rpm according to the deflection detection of the fabric, and thus performs dehydration. Thus, the vibration generated by the deflection of the fabric increases as the dehydration progresses.

Accordingly, an object of the present invention is to provide a dehydration control method for a drum washing machine, which can prevent the dehydration efficiency decrease by minimizing the vibration generated during dehydration.

1 is a cross-sectional view showing the structure of a general drum washing machine.

Figure 2 is a graph showing the change in rpm according to the dehydration progress of the drum washing machine according to the prior art.

3 is a cross-sectional view showing the structure of a drum washing machine according to the present invention.

Figure 4 is a flow chart illustrating a dehydration control method of the drum washing machine according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: body 2: tub

3: drum 4: thermistor

5: detergent container 6: water pipe

7: drain pipe 8: pump

9: drain hose 10: motor

11: belt 12: vibration sensor

The present invention relates to a drum washing machine dehydration control method, the step of setting the first rpm in accordance with the declination state of the laundry cloth to enter the dehydration stroke, rotating the motor while reducing or increasing the first rpm within a predetermined range and vibration accordingly Measuring the amount, characterized in that it comprises a step of proceeding to dehydration at rpm corresponding to the lowest value of the measured vibration amount.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the dehydration control method of the drum washing machine according to the present invention.

3 is a cross-sectional view showing the structure of a drum washing machine according to the present invention, Figure 4 is a flow chart showing a dehydration control method of the drum washing machine according to the present invention.

Drum washing machine according to the present invention is the same as the configuration of the prior art, except that the vibration sensor 12 is installed in a predetermined region of the tub 2, as shown in FIG.

Subsequently, in the dehydration control method of the drum washing machine according to the present invention, first, the user opens a door of the drum washing machine, inputs laundry, and then inputs a washing instruction through the control panel. Therefore, the control unit applies a control signal to each unit to correspond to the washing instruction. Subsequently, the washing motor, various valves, etc. are driven by receiving the control signal of the controller to sequentially perform washing and rinsing.

When the rinsing cycle is finished, the dehydration stroke is entered (S21).

Next, the motor rpm value k is performed to perform the porch deterioration detection and to proceed with the dehydration operation (S22).

In this case, as the above-described dehydration continues at the rpm set by the porch deterioration detection, the vibration may be severe and may cause dehydration performance. Thus, the set rpm (k) may be used to detect an optimal rpm according to the current laundry cloth. ) Is a reference value, and a certain range is set, and the motor is rotated within the range to detect the rpm at which the minimum amount of vibration occurs.

That is, the first vibration amount is measured by rotating the motor at a speed k-100 at which the rpm (k) is lowered by 100 rpm compared to the set rpm (k) (S23), and the measured value is stored in the controller (not shown). Save it.

At this time, the vibration amount is measured by the vibration sensor 12, the vibration sensor 12 mainly outputs a signal having a different amplitude according to the vibration of the washing machine generated when dehydration.

Therefore, the controller measures the vibration amount according to the amplitude of the vibration sensor output signal.

Then, the motor is rotated at a speed of 50 rpm lower than the set rpm (k) to measure the second vibration amount (S24), and the measured value is stored in the controller.

Next, the motor is rotated at the set rpm (k) to measure the third vibration amount (S25), and the measured value is stored in the control unit.

Then, by rotating the motor at a speed of 50 rpm increased compared to the set rpm (k) to measure the fourth vibration (S26), and stores the measured value in the controller.

Subsequently, by rotating the motor at a speed of 100 rpm increased compared to the set rpm (k) to measure the fifth vibration amount (S27), and stores the measured value in the controller.

Then, dehydration is performed at an rpm corresponding to the minimum vibration amount among the first to fifth vibration amount measurement values (S28).

The dehydration control method of the drum washing machine according to the present invention resets the optimum rpm according to the current laundry state based on the preset dehydration rpm and proceeds with dehydration at that speed, thereby minimizing vibration of the washing machine generated during dehydration, thereby resulting in noise. And dehydration performance is prevented.

Claims (3)

In the drum washing machine dehydration control method, Entering a dehydration stroke and setting a first rpm according to a bias state of the laundry cloth; Rotating the motor while reducing or increasing the first rpm in a predetermined range and measuring a vibration amount accordingly; Dehydration control method of a drum washing machine comprising the step of proceeding to dehydration at rpm corresponding to the lowest value of the measured vibration amount. The method of claim 1, Dehydration control method of the drum washing machine, characterized in that the predetermined range is 1rpm ± 200. The method according to claim 1 or 2, Measuring the vibration amount by decreasing or increasing the first rpm within a predetermined range Dehydration control method of the drum washing machine characterized in that the step of measuring the vibration amount by rotating the motor to rpm + 200 while increasing the rpm from 1rpm-200 to 50 units.