KR19980077433A - Washing machine control method - Google Patents

Abstract

The present invention relates to a control method of a washing machine to control the dehydration operation of the washing machine provided with a balancing device.

In the control method of the washing machine according to the present invention, first, it is determined whether a dehydration stroke is selected, and when it is determined that the dehydration stroke is performed, an intermittent dehydration step for eliminating unbalance caused by eccentric laundry by driving the washing motor intermittently. When the intermittent dehydration is completed, the washing motor is rotated at a high speed to dehydrate the laundry, and a balancing step of reducing the rotational speed of the washing tank to solve the unbalance generated in the first dehydration step is performed. It consists of a normal dehydration operation step of dewatering the laundry by rotating at a high speed.

In addition, the balancing step is to reduce the rotational speed of the washing tank to achieve a balancing operation by the movement of the moving body.

In addition, the balancing step consists of intermittently driving the washing motor after stopping the washing tank.

The effect of the present invention according to the above configuration, it is possible to realize low noise and low vibration with excellent balancing action during dewatering operation.

Description

Washing machine control method

The present invention relates to a control method of a washing machine, and more particularly, to a washing machine control method for controlling a dehydration stroke of a washing machine provided with a balancing device.

In general, the washing administration includes processes such as water supply, washing, rinsing, and dehydration. The dehydration process uses centrifugal force. Centrifugal force is generated by the rotation of the washing tub, the magnitude of which is proportional to the square of the washing machine's radius and rotational speed. Therefore, the washing tank has been rotated at high speed in order to obtain a strong centrifugal force. In addition, the balancing of the washing tank is essential to achieve a high speed rotation. For this reason, the washing machine is provided with a balancing device, and performs a balancing operation during initial operation.

That is, referring to FIG. 1, a control flow of a washing machine equipped with a conventional balancer is as follows.

First, the microcomputer determines whether or not the dehydration administration (1a), and if it is determined that the administration other than the dehydration administration (1b), and if it is determined that the dehydration administration, the washing motor is driven to perform the intermittent dehydration step (2a) . This intermittent dehydration step (2a) to increase the rotational speed of the washing tank by driving on / off the power of the washing motor intermittently to drive intermittently. This is to distribute the laundry evenly to some extent and to solve the unbalance caused by the eccentric laundry. That is, when the laundry is rotated, the laundry is eccentric by the centrifugal force, causing unbalance in the laundry. At this time, the moving ball and oil are moved to the opposite side of the eccentric laundry, thereby balancing the unbalance.

Then, the microcomputer determines whether the washing tank is in an unbalanced state (3a) and performs an unbalance release function 1c if it is unbalanced, and returns to the determination step 1a when the unbalance release function 1c is completed. When the balance is performed, the washing motor is operated at a high speed to perform the dehydration operation step 4a. When the programmed set time T elapses, the driving of the washing motor is stopped to complete the dehydration operation (5a, 6a).

However, the following problem occurs in the conventional washing machine control method.

That is, the laundry in the washing tank is further eccentric by the high-speed operation of the washing motor in the dehydration operation step 4a, and moves from the initial position eccentrically in the intermittent dewatering operation step 2a to be reeccentric. The rebalance of the eccentric laundry causes unbalance in the washing tank. However, the centrifugal force appearing on the steel balls and oil, which are moving bodies during rotation of the washing tub, acts more than the balancing force to move to the opposite side of the eccentric laundry so that the steel balls and oil do not escape from the balanced position in the intermittent dehydration operation step 2a. Therefore, the unbalance exhibited by the reeccentric laundry could not be effectively resolved. Accordingly, there was a limit in reducing vibration and noise due to unbalance, and there was a problem in that the production cost was increased during mass production by adding a structural change to overcome the vibration and noise.

The present invention has been made to solve the above-described problems, the technical problem is to provide a control method of a washing machine having a rebalancing step to solve the unbalance caused by the high-speed rotation of the washing tank during dehydration operation.

1 is a flow chart of a conventional control of a washing machine equipped with a balancer;

2 is a cross-sectional view of a washing machine equipped with a balancer to which the present invention is applied;

3 is a control block diagram of a washing machine according to the present invention;

4 is a control flowchart of a washing machine showing an embodiment according to the present invention;

5 is a graph showing a rotation speed change of the washing tub controlled in accordance with FIG.

6 is a control flowchart of a washing machine showing another embodiment according to the present invention;

7 is a graph showing a rotational speed change of the washing tub controlled in accordance with FIG.

8 is a control flow diagram of a washing machine showing another embodiment according to the present invention.

* Description of Signs of Main Parts of Drawings *

1: body 2: tank

3: washing tank 4: driving unit

5: washing motor 6: washing

10: balancing device 11: chamber

12: Oil 13: steel ball

100: microcomputer

In the configuration of the present invention for achieving the technical problem, a balancing device for performing a balancing action by the movement of the mobile when the dehydration function is provided with a moving body, washing machine control method provided with a washing tank equipped with the balancing device In the intermittent dehydration step of controlling the rotational speed of the washing tank to move the movable body to solve the imbalance of the washing tank caused by the laundry eccentric by the rotation of the washing tank, if the imbalance of the washing tank in the intermittent dehydration step is resolved First moving dehydration operation step to increase the rotation speed more than the rotation speed of the washing tank of the intermittent dehydration step, if the imbalance of the washing tank occurs in the first dehydration operation step so that the movable body to move to solve the imbalance of the washing tank Balancing step for controlling the rotational speed of the washing tank, the balance A second dehydration operation step of increasing the rotational speed of the washing tank more than the rotational speed of the washing tank in the balancing step when the balancing operation is completed in the washing step; stopping the washing tank when the dehydration is completed in the second dewatering operation step. It is a stop step.

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

2 is a cross-sectional view of a washing machine provided with a balancing device to which the present invention is applied, and a driving unit 4 and a washing motor 5 for transmitting power required for washing are provided in the lower part of the washing tank 3 provided in the main body 1. ) Is provided, and the balancing device 10 is provided at the top. The balancing device 10 is composed of an annular chamber 11 having a dual structure provided along the outer circumferential surface of the washing tank 3 and a movable body provided to be movable therein.

The above-mentioned moving body is composed of oil 12 and steel balls 13 having a predetermined viscosity or a mixture thereof, which moves along the inside of the chamber 11 when the washing tank 3 rotates, and when the laundry is eccentric, the eccentric laundry 6 In the opposite position). Thus, the centrifugal force acting on the eccentric laundry 6 and the centrifugal force acting on the oil 12 and steel ball 13 are attenuated by acting in opposite directions to solve the unbalance caused by the eccentric laundry 6.

3 illustrates a control block diagram of the washing machine having the configuration of FIG. 2, which will be described below with reference to the drawing.

As shown in FIG. 3, generated by the microcomputer 100 for controlling the overall operation of the washing machine, the function selection unit 50 for inputting each washing function and the washing time, the opening of the door and the eccentricity of the laundry 6. Unbalance detection unit 60 for detecting the unbalance to be displayed, the display unit 70 for alarming the abnormal state such as the display of the operation state and unbalance of the washing machine 1, driving the washing motor 5 in accordance with the input washing program The washing motor driving unit 80, the rotation speed detecting unit 90 for detecting the rotational speed of the driven washing motor 5 and the power supply unit 40 for operating the control circuit of each component.

Hereinafter, the control method of the washing machine composed of the above-described configuration will be described with reference to the control flowchart shown in accordance with the present invention.

4 is a control flowchart illustrating a dehydration operation of a washing machine provided with a balancing device according to one preferred embodiment of the present invention.

In general, the washing machine includes an intermediate dehydration stroke for performing a rinsing function and a dehydration stroke for completing a washing. A determination step of determining whether an intermediate dehydration stroke and a dehydration stroke is selected in a microcomputer during a series of operations is performed (1s). Has

Intermittent dewatering to drive the washing motor 5 by outputting a control signal to the washing motor driving unit 80 if it is determined that the stroke is other than the dehydrating stroke in the determination step (1s). The operation step 2s is performed. This intermittent dewatering operation step (2s) by the on / off control of the power supply of the washing motor 5 periodically raises sequentially until the rotational speed of the washing tank reaches 150rpm, the group of the washing motor 5 due to overload And to distribute the laundry 6 evenly to some degree and to balance the oil 12 and the steel ball 13 in the chamber to move against the position of the eccentric laundry 6.

In addition, during the intermittent dehydration operation, the microcomputer 100 performs an unbalance determination step 3s for determining whether the washing tank 3 is unbalanced.

This unbalance determination step (3s) is the vibration caused by the unbalance during the rotation of the washing tank 3 is transmitted to the water tank 2, the water tank 2 is vibrated back and forth and left and right in this process, the water tank 2 is unbalanced detection unit ( 60), and the unbalance detection signal is output. Therefore, when the detection signal is input to the microcomputer 100, the microcomputer 100 performs an unbalance canceling function for releasing the unbalance of the washing tub 3 (1t). This unbalance releasing function 1t is a drainage process in which water is supplied to the eccentric laundry 6 which is the same as the washing function of a general washing machine, a stroke for releasing the tangled laundry, and then drained the water supply. When the drainage process is completed, the process returns to the initial stage again and performs the determination step 1s to determine whether the dehydration stroke is selected.

When it is determined that the balance state is normal in the unbalance determination step (3s), the microcomputer 100 outputs a control signal to the washing motor driver 80 to increase the rotational speed of the washing motor 5 to 400 rpm. Step 4s is entered. The laundry 6 is more eccentric than the intermittent dehydration operation step 2s by performing the first dewatering operation step 4s, thereby causing the washing tank 3 to be unbalanced. However, there is no balancing action to eliminate unbalance. This causes the centrifugal force appearing in the oil 12 and steel ball 13 of the moving chain to be greater than the balancing action force to move along the inside of the chamber 11 to the opposite side of the eccentric laundry 6. Therefore, the oil 12 and the steel ball 13 are strongly adhered to the inner wall of the chamber 11 so as not to escape from the position moved by the balancing action in the first balancing step 2s.

Then, the microcomputer 100 determines whether or not a predetermined time set in advance in order to solve the unbalance that may have occurred in the first dehydration operation step (5s), and the set time (time when the rotation speed of the washing tank reaches about 400 rpm) is determined. When the elapsed time, the balancing step (6s) to reduce the rotation speed of the washing motor (5) is performed. This balancing step (6s) is for solving the unbalance represented by the laundry 6 eccentric in the first dewatering operation step (4s), which is the oil 12 and steel balls 13 in the first dewatering operation step (4s) By weakening the centrifugal force applied to the), the oil 12 and the steel ball 13 is to move along the inside of the chamber (11). That is, the microcomputer 100 outputs a control signal to the washing motor driving unit 80 to drop the rotational speed of the washing motor 5 at a predetermined 150 rpm, thereby balancing the unbalance appearing in the first dehydration driving step 4s. Perform the action.

Then, the microcomputer 100 determines whether the preset time (T2: time when the rotation speed of the washing tank falls to about 150 rpm) has elapsed (7s), and if the setting time T2 has not elapsed, the balancing step (6s) is performed for the remaining time. Further, if the elapsed time, the washing motor 5 is operated at high speed in a stable balancing state to perform the second dehydration operation step (8s), and when the programmed set time (T3: determined by the consumer's setting) elapses, The driving of the washing motor 5 is stopped to complete the dehydration stroke (9s, 10s).

FIG. 5 is a graph showing a change in the rotation speed of the washing tub 3 operated according to FIG. 4, wherein (a) rotates the washing tub 3 by intermittently driving the washing motor 5 in the intermittent dehydration operation step 2s. The number is gradually raised (up to 150 rpm) to prevent overload of the washing motor 5 due to overload, and to distribute the laundry 6 evenly to some degree, and at the same time, the oil 12 and the steel ball 13 inside the chamber 11. It is time to perform the balancing operation by moving against the position of the eccentric laundry (6).

(B) Dehydration is performed for a predetermined time (time at which the rotational speed of the washing tank reaches 400 rpm) as the first dehydration operation step 4s, at which time unbalance occurs due to the relocation of the laundry 6.

(C) is the balancing step (6s) to rotate the rotation speed of the washing tank (3) so that the oil (12) and steel balls (13) can move to the opposite side with respect to the laundry (6) eccentric in the first dewatering operation step (4s) It is time to perform balancing operation by dropping to 150rpm.

(D) is a time for performing the dehydration operation for a time set by the user by raising the rotational speed of the washing tank to the 680 rpm in the second dehydration operation step (8s).

6 is a control flowchart of a washing machine according to another embodiment of the present invention, which will be described below.

From the dehydration determination step (1s) to the set time lapse determination step (5s) is the same as in the above-described embodiment of Figure 5 will be described only below.

After the first dehydration operation step 4s, the microcomputer 100 determines whether the preset operation time T1 has elapsed, and if the set time has not elapsed, further performs the first dehydration operation step 4s for the remaining time. If it passes, the balancing step is performed.

The balancing step consists of a washing motor stop step 11s and an intermittent dewatering operation step 12s. Therefore, when the set time of the first dehydration operation step elapses, the microcomputer 100 outputs a control signal to the washing motor driver 80 to perform the washing motor stop step 11s for stopping the washing motor 5. The washing motor stop step 11s is for relieving the unbalance caused by the laundry 6 eccentric in the first dewatering operation step 4s, which is the oil 12 and the steel ball in the first dewatering operation step 4s. By removing the centrifugal force applied to 13), the oil 12 and the steel balls 13 can move along the inside of the chamber 11.

Then, when the stop of the washing motor 5 is detected from the rotation speed detecting unit 90, the microcomputer 100 outputs a control signal to the washing motor driving unit 80 to perform the intermittent dehydration operation step 12s. This intermittent dehydration operation step (2s) by the on / off control of the power supply of the washing motor (5) in order to increase sequentially until the rotation speed of the washing tank (3) reaches 150rpm washing motor (5) by overload This is to prevent the overload and to balance the oil 12 and the steel ball 13 in the chamber 11 to move against the position of the eccentric laundry (6).

Thereafter, the microcomputer 100 performs an unbalance determination step 13s for determining whether the washing tank 3 is unbalanced. This unbalance determination step 13s is satisfactorily sensed by the unbalance detection unit 60.

That is, when the detection signal from the unbalance detection unit 60 is input to the microcomputer 100, the microcomputer 100 performs an unbalance canceling function 2t for releasing the unbalance of the washing tub 3. This unbalance canceling function 2t is the same as that of a general washing machine. When the unbalance canceling function 2t is completed, the second balance step 12s is returned to sequentially perform the next step.

When it is determined that the balance state is normal in the unbalance determination step 13s, the microcomputer 100 outputs a control signal to the washing motor driver 80 to perform the second dehydration operation step 14s for rotating the washing motor 5 at high speed. Perform.

The microcomputer 100 determines whether the preset time T4 has elapsed, and if the set time T4 has not elapsed, further performs the second dehydration operation step 14s for the remaining time, and the programmed set time T4. When elapsed), the driving of the washing motor 5 is stopped to complete the dehydration stroke (15s and 16s).

FIG. 7 is a graph illustrating a change in the rotation speed of the washing tub 3 operated according to FIG. 6, wherein (a) periodically turns on / off the power of the washing motor 5 in the intermittent dehydration operation step 2s. The rotation speed of the washing tank is sequentially raised to 150 rpm to prevent the washing motor 5 from being overloaded, and to distribute the laundry 6 evenly to some degree, and at the same time, the oil 12 and the steel balls 13 in the chamber It is time to perform the balancing operation by moving against the position of the eccentric laundry (6).

(B) Dehydration is performed for a predetermined time (time at which the rotational speed of the washing tank reaches 400 rpm) as the first dehydration operation step 4s, at which time unbalance occurs due to the relocation of the laundry 6.

(E) stop the washing tank in the balancing steps (11s, 12s) to remove the centrifugal force acting on the oil (12) and steel balls (13), the oil 12 and steel balls (13) is the first dewatering step (4s) It is time to perform the balancing operation by raising the rotational speed of the washing tank 3 to 150rpm so as to move to the opposite side with respect to the eccentric laundry (6).

(Bar) is a time for performing the dehydration operation for a time set by the user by raising the rotational speed of the washing tank 3 to the 680rpm in the second dehydration operation step (14s).

FIG. 8 is another embodiment according to the present invention, and description of the same parts as in FIG.

After the balancing step 12s, the microcomputer 100 determines whether the unbalance detection signal is input from the unbalance detection unit 60, and if not, performs the second dehydration operation step 14s, and if the detection signal is input, The unbalance release function for releasing the unbalance of the washing tank 3 is performed.

That is, the washing motor 5 stops (3t) the washing motor 5 by outputting a control signal to the washing motor driving unit 80, which indicates that the display unit 70 is in an unbalanced state, and also emits an alarm sound for a predetermined time. Make it aware that it is unbalanced (4t).

Thereafter, the microcomputer 100 determines (5t) whether the unbalance release signal is input from the user through the function selection unit 50, and if so, returns to the balancing step 12s, and if not, the unbalance release signal is not input. Wait for input (6t).

And as a variant, the setting time lapse determination step shown in the above-described embodiments can be replaced by a determination step of comparing the rotation speed of the washing tank and the preset rotation speed of the washing tank. That is, the time elapsed can be determined by measuring the rpm reached after a certain time and storing it in the microcomputer as a reference data value and comparing it with the rotation speed of the washing tank at each step.

In addition, this invention is not limited to the said Example, It can change and implement variously in the range which does not deviate from the summary.

As described above, the control method of the washing machine according to the present invention provides an excellent balancing action by having a rebalancing step for eliminating the unbalance caused by the high-speed rotation of the washing tank during the dehydration operation.

In addition, it provides an excellent effect to realize low noise and low vibration by stable balancing operation during dehydration operation.

In addition, there is little additional burden such as structural change to overcome the noise and vibration provides an excellent effect of reducing the production cost.

Claims (5)

In the washing machine control method comprising a washing machine equipped with a balancing device for performing a balancing action by the movement of the moving body when the dehydration function is provided with a moving body, Intermittent dewatering step of controlling the rotational speed of the washing tank to move the moving body to solve the imbalance of the washing tank caused by the laundry eccentric to the rotation of the washing tank, A first dehydration operation step of increasing the rotation speed of the washing tank more than the washing tank rotation speed of the intermittent dehydration step when the imbalance of the washing tank is resolved in the intermittent dehydration step; A balancing step of controlling the rotational speed of the washing tub so that the movable body can move to solve the imbalance of the washing tub when an imbalance of the washing tub occurs in the first dehydration operation step; A second dehydration operation step of increasing the rotation speed of the washing tank more than the washing tank rotation speed in the balancing step when the balancing operation is completed in the balancing step; The control method of the washing machine comprising a stop step of stopping the washing tank when the dehydration is completed in the second dehydration operation step. The method of claim 1, wherein the balancing step The control method of the washing machine, characterized in that for reducing the rotational speed of the washing tank so that the movable body moves to balance. The method of claim 1, wherein the balancing step After stopping the rotation of the washing tank, the control method of the washing machine characterized in that to increase the rotational speed of the washing tank so that the movable body can move to balance. The method of claim 3, Unbalance determination step of determining the imbalance of the washing tank when the balancing step is completed, An unbalance release step for releasing unbalance if it is determined that the imbalance is in the unbalance determination step, When the unbalance release step is completed, the second balancing step is performed, and if it is determined that the balance in the unbalance determination step, the control method of the washing machine, characterized in that for performing the dehydration operation step. The control method according to claim 4, wherein if it is determined that the imbalance is unbalanced in the unbalance determination step, an alarm operation is performed and the washing tank is stopped.