KR20000033342A - Method for controlling unbalance of washing machine - Google Patents

Abstract

PURPOSE: A method for controlling an unbalance is provided to dehydrate with reducing the rotation number of a motor in one step when the unbalance is generated, and to dehydrate with removing the unbalance by forward and reversely rotating a washing tub when the unbalance is generated again. CONSTITUTION: The rotation number is arrived at the set rotation number by raising the rotation number of a motor after finishing a washing and a rinsing operation. A vibrating width during an optionally set cycle is detected. If the detected vibrating width is smaller than an optionally set vibrating width, dehydration is performed by raising the rotation number of the motor in one step. If the detected vibrating number is larger than the certain vibrating width, the dehydration is performed by reducing the rotation number in one step. If the vibrating width detected during proceeding the dehydration by reducing one step is larger than the set vibrating width continuously, the dehydration is performed during removing an unbalance by stopping the dehydration and by forward and reversely rotating a washing tub in a certain number.

Description

How to control unbalance of washing machine

The present invention relates to a method for controlling an unbalance of a washing machine, and in particular, in a series of washing strokes, when an unbalance occurs by detecting whether an unbalance occurs due to an eccentricity of a washing tank caused by twisting of a laundry after washing or rinsing, or dehydration, the number of rotations of a motor When the dehydration lowered one step again and the unbalance occurs again, the washing machine forward and reverse rotation, and the unbalance control method of the washing machine to be dehydrated while releasing the unbalance.

In general, the washing process of the washing machine is performed by washing, rinsing, and dehydrating administration. After the washing or rinsing is completed, dehydration is performed to remove sewage absorbed in the laundry.

However, during the dehydration, twisting of the laundry occurs due to the flow of rotation during washing or rinsing, and thus the laundry is unbalanced on either side of the washing tank, thereby causing an unbalance of the washing tank.

Therefore, conventionally, dehydration is performed after intermittent dehydration at a low speed in order to solve the unbalance of the washing tank during dehydration.

As described above, in the dehydration process, the conventional unbalance control method, as shown in Figs. 1 and 2, increases the rotational speed of the motor to an arbitrarily set rotational speed in the initial stage of dehydration, and then rotates the rotational speed during the arbitrarily set period T. The vibration width ΔR of the rotational speed according to the amount of change is sensed, and then it is determined whether the detected vibration width ΔR of the rotational speed is larger than a predetermined vibration width R, and the detected vibration width ΔR. If not smaller than the set vibration width R, the dehydration proceeds while entering normal dehydration, whereas if the detected vibration width ΔR is greater than the set vibration width R, the vibration is 3 If it is not more than 3 times, stop the motor, supply water to the washing tank, loosen the laundry twisted by the wash water, correct the unbalance, drain and re-set the motor's rotation speed arbitrarily. When the vibration is judged to be three or more times, the unbalance is detected and controlled by the process of stopping the motor and generating an unbalance error.

Therefore, in the conventional unbalance control method, when an unbalance occurs during dehydration, the process of draining a predetermined number of times (3 times) after stopping the motor, supplying water, and correcting the unbalance after supplying water is performed. In addition to this, the unbalance detection is detected only once in the first stage of the increase in the rotational speed of the motor, and if the unbalance is not severe, the unbalance is not detected and proceeds to high speed dehydration. Rotational centrifugal force causes a large flow of the washing tank, which causes unbalance, resulting in a large vibration noise during high speed dehydration.

An object of the present invention is to detect the unbalance vibration width of the washing tank generated by the twisting of the laundry after washing or rinsing completion or dehydration, and if the detected vibration width is less than the set vibration width, while dehydrating while increasing the rotation speed of the motor, If the detected vibration width is greater than the set vibration width, the motor rotation speed is lowered by one step or less, and if the detected vibration width is larger than the set vibration width, the washing tank is rotated forward and backward to release the unbalance by dehydration. In addition to shortening the time, it is to reduce the occurrence of unbalance, and to reduce the vibration noise.

In order to realize the above object, the present invention is to increase the rotational speed of the motor during dehydration, if the rotational speed reaches a predetermined rotational speed to detect the vibration width for a randomly set period to determine whether the detected vibration width is less than the arbitrarily set vibration width And dehydrating while increasing the rotational speed of the motor by one step if the vibration width detected in the step is less than the predetermined vibration width, and if the vibration width detected in the step is greater than the predetermined vibration width, When dehydration progresses while lowering one level or less, and when the vibration width resensed during the dehydration progresses by one step and becomes larger than the set vibration width, the dehydration stop and the washing tank are reversed and rotated to release the unbalance and the number of unbalance releases is predetermined. Dehydration while determining the number of times And dehydration stop, water supply, and drainage if the number of unbalance release times is a predetermined number or more, and re-dehydration, and re-detecting the vibration width, wherein the vibration width redetected in the step is larger than the set vibration width. When the dehydration is stopped and characterized in that the step consisting of generating an unbalance error.

1 is a flow chart for the unbalance control method of a conventional washing machine

Figure 2 is an unbalanced dehydration vibration speed control waveform diagram of a conventional washing machine

3 is a schematic longitudinal sectional view of a washing machine used in the present invention;

4 is a schematic control block diagram of a washing machine used in the present invention;

Figure 5 is a flow chart for the unbalance control method of the washing machine of the present invention

Figure 6 is a low vibration dehydration vibration speed control waveform diagram applied to the present invention

Figure 7 is a high vibration dehydration vibration speed control waveform diagram applied to the present invention

8 is a vibration measurement waveform diagram when entering the dehydration applied to the present invention

FIG. 9 is a waveform diagram of vibration measurement of unbalance generated when entering dehydration applied to the invention

Explanation of symbols for main parts of the drawings

end; Operation signal input unit b; Micom

All; Drainage and driving part d; Motor drive

hemp; Unbalance detection bar; Vibration Width Detection Unit

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

Figure 3 is a schematic longitudinal sectional view of the washing machine used in the present invention, a washing tank for washing, rinsing, dehydrating the outer cylinder (1) for draining sewage after washing or rinsing, and the laundry to be washed in the outer cylinder (1) (2) and the lower part of the washing tank (2) and the motor (3) for rotating the washing tank (2) at high speed in the forward, reverse and one direction by an electrical signal, and the washing tank on the rear upper portion of the outer cylinder (1) It consists of a safety switch (4) for detecting the unbalance of (2).

Figure 4 is a schematic control block diagram of a washing machine used in the present invention, a driving signal input unit (A) for inputting a driving signal for a series of washing administration and receiving the operation signal input from the driving signal input unit (A) The washing tank is defined by a microcomputer (b) controlled by a predetermined program, a water supply / drainage driving unit (c) which supplies and drains water by a control signal of the microcomputer (b), and a control signal of the microcomputer (b). The motor drive unit (D) performs washing, rinsing, and dehydration operation by rotating in reverse and high speed, and an unbalance detection unit (E) detecting the unbalance of the washing tank by the control signal of the microcomputer (B), and the microcom The vibration signal detecting part (bar) for detecting the vibration width when the unbalance of the washing tank is generated by the control signal of (b).

FIG. 5 is a flowchart illustrating a method for controlling an unbalance of a washing machine of the present invention, in which a vibration width ΔR is sensed for an arbitrarily set period T when the rotational speed of the motor is increased to reach the set rotational speed R1 during dehydration. And determining whether the determined vibration width ΔR is less than the arbitrarily set vibration width R, and if the detected vibration width ΔR is less than the arbitrarily set vibration width R, the motor Dehydration proceeds while increasing the number of revolutions by one step, and when the vibration width ΔR detected in the steps 50 and 51 is greater than a randomly set vibration amount R, the number of revolutions is one step or less. Dehydration by lowering to, and again determining whether the vibration width (ΔR) is less than the set vibration width (R) (52), and if the vibration width (ΔR) detected in the step 52 is less than the set vibration width (R) the motor Dehydration while increasing the rotation speed of Step 53 and when the vibration width (ΔR) detected in the step 52 is larger than the set vibration width (R), the dewatering stop and the washing tank is reversed by a predetermined number of times to release the unbalance and then the number of unbalance release Determining step 54, and if the number of unbalance releases in step 54 is less than or equal to the predetermined number of releases, step 55 of dehydrating while increasing the number of revolutions again, and number of unbalance releases in step 53 Dehydration stop, water supply, and drainage after the predetermined number of times or more, increase the number of revolutions of the motor again to dehydrate, and detect the vibration width ΔR to determine whether the detected vibration width ΔR is less than the set vibration width R (56). And, if the vibration width (ΔR) detected in the step 56 is larger than the set vibration width (R) is to stop the dehydration and generate an unbalance error (57).

Figure 6 shows a low vibration dehydration vibration speed control waveform diagram applied to the present invention, Figure 7 shows a high vibration dehydration vibration speed control waveform diagram applied to the present invention.

FIG. 8 is a view illustrating a waveform diagram of vibration measurement when entering dehydration applied to the present invention, and FIG. 9 is a diagram illustrating a waveform measurement waveform of unbalance generated when entering dehydration applied to the present invention.

When explaining the operation of the present invention made as described above in detail.

First, when the laundry is put in the washing machine and a series of washing administration driving signals to be washed through the driving signal input unit (A) is input to the microcomputer (B), the microcomputer (B) supplies a drainage drain by a predetermined program. It controls the eastern part (C) and supplies water to the appropriate water level according to the washing amount, and controls the motor 3 through the motor driving part (D) to perform the washing operation while rotating the washing tank 2 forward and reverse.

Subsequently, when the washing stroke is completed, the microcomputer (b) goes to step 50 to proceed with dehydration, that is, in the microcomputer (b), the motor 3 is controlled by the motor driving unit d to rotate the motor. 6 and 7, the washing tank 2 is rotated in one direction while the water is raised to reach the set rotational speed R1 to proceed with dehydration.

In this way, while the washing tank 2 is rotated at the set rotation speed R1, the microcomputer (b) controls the unbalance detection unit (e) to detect the unbalance of the washing tank 2 through the safety switch 4 and the vibration width. 6 and 7 to detect the vibration width ΔR during the arbitrarily set period T1 as shown in FIGS. 6 and 7, and then the vibration width ΔR detected through the vibration width detection unit bar. It is judged whether or not the vibration width R is arbitrarily set.

At this time, if the detected vibration width ΔR is less than the arbitrarily set vibration width R, the microcomputer (b) goes to step 51 and determines that unbalance is not detected through the unbalance detection unit (e). D), while rotating the washing tank 2 in one direction while increasing the rotational speed of the motor to reach the set rotational speed R2 as shown in FIGS. 6 and 7, dehydration is performed. In this case, the vibration width ΔR is sensed through the vibration width detection unit (Bar) during the arbitrarily set period T1, and then it is determined whether the detected vibration width ΔR is less than the arbitrarily set vibration width R. If the detected vibration width ΔR is less than the arbitrarily set vibration width R, it is determined that the unbalance is not detected in the microcomputer (b).

Then, the motor driving unit (D) is controlled to raise the rotational speed of the motor in turn until the rotational speed (R3), (R4), the rotational speed ( _Rn ) which is a high-speed rotation in order to arbitrarily set period (T1) The vibration width ΔR is sensed while the high speed dehydration is performed from the low speed dehydration while determining whether the detected vibration width ΔR is less than the arbitrarily set vibration width R.

However, in the steps 50 and 51, while the motor speed is increased to the set rotation speed R1-R _n , during the dehydration, it is sensed during the arbitrarily set period T1 through the vibration width sensing unit bar. When the vibration width ΔR is greater than the arbitrarily set vibration width R, the microcomputer (b) determines that the unbalance is detected in the washing tank 2 and that the unbalance is detected through the unbalance detection unit (e). Then, the motor driving part D is controlled to lower the rotation speed of the motor 3 to one level or less to proceed with dehydration, and to control the vibration width detecting part B again to control the vibration width ΔR again during the arbitrarily set period T1. It is determined that the detected vibration width ΔR is less than the arbitrarily set vibration width (R).

Subsequently, if the detected vibration width ΔR is less than the set vibration width R in the micom (b), the microcomputer (b) determines that the unbalance is resolved as shown in FIG. Dehydration proceeds by increasing the rotational speed of the motor 3 by one step through the motor driving part D, and again controls the vibration width detecting part bar to again adjust the vibration width ΔR during the arbitrarily set period T1. Dehydration is performed while determining whether the detected vibration width ΔR is less than the arbitrarily set vibration width R. At this time, if the detected vibration width ΔR is less than the arbitrarily set vibration width R, the micom ( In step b), the dehydration is repeated from step 51 again.

On the other hand, if the vibration width ΔR detected in the steps 52 and 53 is greater than the set vibration width R, the microcomputer (b) goes to step 54 and again washes through the unbalance detection unit (e). As shown in FIG. 9 in (2), it is judged that unbalance has occurred, and the motor 3 is controlled through the motor driving unit d to stop the washing tank 2 and stop the dehydration stop. By controlling, the washing tank 2 is rotated forward and backward at a predetermined number n to release the unbalance of the washing tank 2, and it is determined whether the number of the unbalance release times is more than the set number of unbalance release times (2 times). do.

However, if it is determined in step 54 that the number of unbalance releases is not more than a predetermined number (two times) or less, the microcomputer (b) goes to step 55 and controls the motor driving unit d to control the motor 3. ) To go back to step 52 while repeatedly increasing the rotational speed by one step to perform dehydration repeatedly.

If the number of unbalance release times in step 54 is not less than a predetermined number (two times), or more, the microcomputer (b) determines that unbalance is continuously generated and detected through the unbalance detection unit (e) and unbalanced. In order to release the step, go to step 56 to control the motor 3 through the motor driving unit (D) to stop the washing tank 2 to stop dehydration, and to control the water supply and drain driving unit C. 2) to release the unbalance as shown in FIG. 8, drain the wash water supplied to the washing tank (2), and then control the motor (3) through the motor driving unit (D) again to increase the rotational speed of the motor. Dehydration is made by increasing the number of rotations arbitrarily set, and controlling the vibration width detecting unit (bar) to detect the vibration width ΔR while determining whether the detected vibration width ΔR is less than the set vibration width R.

At this time, if the vibration width ΔR sensed in the step 56 is less than the set vibration width R, the microcomputer (b) determines that the unbalance is released and proceeds to the step 51 to proceed with dehydration. If the vibration width ΔR detected in step 56 is greater than the set vibration width R, the microcomputer (b) goes to step 57 and unbalance of the washing tank is severely generated as shown in FIG. It is determined that the motor driving unit (D) is controlled to stop the motor 3 to completely stop dehydration and generate an unbalance error.

As described above, the present invention, after washing or rinsing completion or dehydration, increases the rotational speed of the motor to detect a vibration width for a predetermined period when the rotational speed reaches a predetermined rotational speed, and the detected vibrational width is greater than the set vibrational width. If less, dehydration while increasing the rotational speed of the motor, on the other hand, if the detected vibration width is greater than the set vibration width, if the rotation speed of the motor is dewatered to one level or less, if the detected vibration width is greater than the set vibration width, the washing tank is fixed, By rotating in reverse to release the unbalance, it is possible to shorten the release time of the unbalance generated during dehydration, thereby reducing the overall washing time, and reducing the occurrence of the unbalance, thereby greatly reducing vibration noise. It will provide a possible effect.

Claims (5)

After the washing and rinsing operation is completed, when the spin speed is increased, the motor speed is increased. When the speed reaches the preset speed, the vibration speed is sensed for a randomly set period. Dehydrating while increasing, and if the vibration width sensed in the step is greater than a predetermined vibration width, dehydrating while lowering the rotation speed to one level or less, and reducing the vibration width by one step in the step, and resensing the vibration width during the dehydration process. If the greater than the set vibration width, the de-watering stop and the washing tank forward and reverse rotation, the de-balancing control method comprising the step of dewatering while releasing the unbalance a predetermined number of times. The washing machine according to claim 1, wherein when the detected vibration width is less than the set vibration width, the increase of the motor rotation speed is sequentially increased in a plurality of steps from low speed to high speed, and dehydration is performed while detecting the vibration width in each of the multiple steps. Unbalance control method. The method of claim 2, wherein if the detected amplitude of vibration in the multi-sequential ascension is greater than the set vibration width, the motor rotation speed is lowered to one level or less, and the rotation speed of the motor is increased and decreased by one step while detecting the vibration width. Unbalance control method of the washing machine characterized in that. The method of claim 1, wherein when the washing and rinsing operation is completed, the rotation speed of the motor is increased when the rotation speed reaches a predetermined rotation speed when the rotation speed reaches a predetermined rotation speed, and the vibration width is sensed for a predetermined period. Dehydration proceeds while lowering the rotation speed to one step or less, and if the vibration width redetected during the dehydration progresses by one step at the same time and continues to be larger than the set vibration width, dehydration stops and the washing tank is rotated forward and backward to release the unbalance. Unbalance control method of the washing machine characterized in that. [5] The method of claim 1 or 4, wherein when the detected vibration width is greater than the set vibration width, the rotation speed is lowered by one step so that the vibration width redetected during the dehydration process continues to be larger than the set vibration width so that the dewatering stop and the washing tank are reversely rotated to release the unbalance. If the number of times of unbalance release is more than a predetermined number of times, dehydration stop, water supply, drainage, and then dehydration are performed again. When the detected amplitude is again detected, the dehydration stops dehydration and generates an unbalance error. Unbalance control method of the washing machine characterized in that consisting of.