KR19980068193A - Operation control method of washing machine - Google Patents

Abstract

The present invention relates to an operation control method of a washing machine. In particular, after performing a washing operation, the amount of foam remaining in the laundry is sensed, and a predetermined amount is supplied to the laundry according to the detected amount of foam, and then drained, and then at a low speed. By selectively performing an intermediate rinse stroke to dewater, and then performing a dehydration stroke before rinsing, the foam after washing is effectively removed, thereby extending the mechanical life and improving the dewatering and rinsing performance before rinsing.

Description

Operation control method of washing machine

The present invention relates to a washing machine, and more particularly, by performing an intermediate rinsing stroke selectively according to the amount of foam remaining in the laundry after performing the washing stroke, effectively removing the foam, thereby extending the mechanical life, rinsing It relates to an operation control method of a washing machine suitable for improving the total dewatering and rinsing performance.

In general, a conventional washing machine, as shown in Figure 1, the detergent container 3 and the operation unit 5 is installed on the upper front of the washing machine main body 1, the rear of the main body is connected to the water supply means not shown The hot and cold water supply valves 7 and 8 are provided to supply hot and cold water.

A tub 9 is installed in the main body 1, and a drum 11 is installed to perform washing and dehydration by rotating at high speed simultaneously with the application of power from the power supply means not shown.

A plate 15 is attached to the front of the tub 9 so that the door 13 can be opened and closed when the laundry is put into and taken out of the drum 11, and the front of the tub 9 is washed and dehydrated. The counterweight 19 is provided to prevent the vibration generated during the high speed rotation of the drum (11).

In addition, the lower side of the tub (9) is provided with a power generating means 27 for forward and reverse rotation of the drum (11), the drain pump connected to the drain hose not shown in the lower end of the washing machine body (1) (29) is provided, and the filter 31 for preventing the drainage pump 29 from being blocked by washing residues such as residual water and dirt discharged from the tub (9) in the lower front of the main body (1) It is installed.

The drum 11 has a plurality of through-holes 11a formed on the front surface thereof so that laundry can be rolled in the drum 11 and the wash water in the tub 9 can flow into the drum 11. The inside of the drum 11 is fastened by the water flow control means (11b) not shown in the interval of 120 ° apart from each other by pulling up and dropping the laundry to give the same washing effect as when washing with a laundry bat It is bound by a means.

The operation of the conventional laundry washing machine made of the above-described constituent members and the washing operation according to the washing process will be described in more detail with reference to FIG. 1.

First, a user opens a door 13 to inject laundry into the drum 11, and a desired washing course (for example, a washing stroke, a rinsing stroke, a dehydrating stroke, a time for each stroke, a reservation through the operation unit 5). When the start key is operated after inputting time, rinsing frequency, etc., the corresponding key signal is provided from the operation unit 5 to the control means, not shown.

At this time, when a key signal instructing the start of washing from the operation unit 5 is input to the control means, the control means generates a water supply control signal and a detergent input control signal, and according to the water supply control signal, the hot or cold water supply valve 7 (8) is operated so that hot water or cold water is supplied to the drum 11 through the detergent container 3 by a predetermined reference amount, and the detergent is introduced into the drum 11.

Then, the control means generates a drive control signal to operate the drive motor, not shown in the power generating means 27, to rotate the drum 11 to the left and right, so that the laundry in the drum 11 flows into the water flow control means 11-. By b) it is repeated to the lifting and falling movement, through which the laundry is made.

After performing this washing operation during the washing time corresponding to the washing course, the control means generates a drain control signal, and according to the drain control signal, the drain valve shown in the drawing is opened, while the drain pump 29 In operation, the washing water in the drum 11 is drained to the outside.

Thereafter, the control means generates a drive control signal, and the drive motor in the power generating means 27 rotates at high speed in response to the drive control signal, and the drum 11 is rotated at high speed so that the wash water remaining in the laundry is dehydrated. do.

After performing such a dehydration stroke before rinsing for a dehydration time before rinsing corresponding to the input washing course, the control means generates a water supply control signal, and the hot or cold water supply valves 7 and 8 provide the water supply control signal. As a result, hot water or cold water is supplied to the drum 11 by a predetermined reference amount.

Then, the control means generates a drive control signal to operate the drive motor, not shown in the power generating means 27, to rotate the drum 11 to the left and right, so that the laundry in the drum 11 flows into the water flow control means 11-. By b) it is repeated to the lifting and falling movement, through which the detergent residue and contaminated wash water remaining in the laundry is rinsed.

After performing the rinsing operation as described above during the rinsing time corresponding to the washing course, the control means generates a drainage control signal, and the drain valve shown in the drawing is opened in accordance with the drainage control signal, while the drain pump 29 Is operated so that the washing water in the drum 11 is drained to the outside.

Then, the control means generates a drive control signal, and the drive motor in the power generating means 27 rotates at high speed in response to the drive control signal, and the drum 11 is rotated at high speed, so that the wash water remaining in the laundry is dehydrated. do.

On the other hand, in the laundry administration as described above, a large amount of foam is generated from the detergent by the movement of the laundry, such foam is increased by the friction force between the tub 9 and the drum 11, the power during the dehydration administration before rinsing There is a problem that causes excessive operation of the drive motor in the generating means 27 to shorten the mechanical life.

In addition, in order to rinse the foam sufficiently in the conventional rinsing stroke, the rinsing operation was performed for a relatively long time, and the foam is often left even after the rinsing stroke, the user's dissatisfaction with the washing performance of the washing machine There was a problem that caused.

Therefore, the present invention has been made to solve the above problems, the present invention by selectively performing the intermediate rinsing process according to the amount of foam remaining in the laundry after performing the laundry administration, by effectively removing the foam after washing It is an object of the present invention to provide a method for controlling the operation of a washing machine which can extend the mechanical life and improve the dehydration and rinsing performance before rinsing.

Operation control method of the washing machine according to the present invention for achieving the above object, the washing step of washing the laundry by performing a laundry administration according to the selected washing course, and detecting the amount of foam of the laundry washed in the washing step, Dehydration step before rinsing the laundry according to the amount of foam, and rinsing administration for the laundry according to the selected washing course, characterized in that consisting of a rinsing and dehydration step of dewatering.

1 is a schematic structural perspective view of a typical washing machine;

2 is a schematic block diagram of hardware for performing a driving control method of a washing machine according to the present invention;

Figure 3 is a flow chart for explaining the operation of the operation control method of the washing machine according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: operation unit 200: control unit

300: water supply unit 400: power generation unit

500: speed sensor 600: drain

700: Drum

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

Figure 2 is a schematic block diagram of the hardware for performing the operation control method of the washing machine according to the present invention, the operation unit 100, the control unit 200, the water supply unit 300, the power generating unit 400, It consists of a speed sensor 500, the drain part 600, and the drum 700.

In FIG. 2, when the user manipulates an operation key to input a washing course, the operation unit 100 generates a corresponding key signal, and the control unit 200 according to the washing course input through the operation unit 100. Generate various control signals to perform the washing operation.

In addition, the water supply unit 300 selectively provides the drum 700 with cold water or hot water supplied from an external water supply unit according to a water supply control signal applied from the controller 200, and the power generator 400 may include a controller ( Power is generated in accordance with the driving control signal applied from the 200 to rotate the drum 700 forward and backward.

In addition, the speed sensor 500 detects the rotational speed of the drum 700 and generates a speed signal corresponding thereto, and the drainage part 600 is after each stroke according to the drainage control signal applied from the control part 200. The washing water of the drum 700 is discharged to the outside.

Then, the drum 700 performs washing for the laundry put into the user through the left and right stirring and rotational movement.

An operation process of the operation control method of the washing machine according to the present invention through the hardware configured as described above will be described in more detail with reference to FIGS. 2 and 3.

First, the user opens the door (not shown) and puts laundry and detergent into the drum 700, and then the desired washing course (for example, washing stroke, rinsing stroke, dehydrating stroke, and each stroke) through the operation unit 100. A time, a reservation time, a rinsing frequency, etc.) are input (S10), and a start key is manipulated (S20), and a corresponding key signal is provided from the controller 200 to the controller 200.

When the key signal for the start of washing is input from the controller 200, the controller 200 performs the washing administration during the washing time corresponding to the washing course (S30), and the detailed operation thereof is as follows.

In the step of performing the washing operation (S30), the control unit 200 generates a water supply control signal for supplying a predetermined reference water amount in the drum 700 is applied to the water supply unit 300, water supply unit 300 In accordance with the water supply control signal applied from the control unit 200 is supplied to the drum 700, the cold water or hot water provided from the external water supply means by the reference amount.

Next, the control unit 200 generates a driving control signal for rotating the drum 700 and applies it to the power generating unit 400, and a driving motor not shown in the power generating unit 400 is removed from the control unit 200. The drum 700 is rotated forward and backward according to the driving control signal applied thereto.

Accordingly, the laundry is repeatedly lifted up and dropped by the water flow control means omitted in the drum 700, and the laundry is washed.

When the washing time corresponding to the washing course elapses, the control unit 200 generates a drainage control signal, and the drainage unit 500 operates according to the drainage control signal to drain the wash water in the drum 700 to the outside. do.

Thereafter, the control unit 200 generates a drive control signal for rotating the drum 700 at high speed (S40), and starts the dehydration operation before rinsing.

Accordingly, the drive motor in the power generator 400 rotates at high speed, and the drum 700 rotates at high speed, so that the remaining washing water remaining in the laundry starts to be dewatered.

Here, the rotational speed of the drum 700 is sensed by the speed sensor 500, and a speed signal corresponding thereto is input to the controller 200.

At this time, the control unit 200 detects the rotational speed of the drum 700 (hereinafter referred to as dehydration speed) according to the speed signal (S50), and compares whether the detected dehydration speed is above a predetermined reference speed (S60). ).

Here, if the dehydration speed is more than the reference speed is a small amount of foam remaining in the laundry in the drum 700, if the rotational speed of the drum 700 is less than a predetermined reference speed to the laundry in the drum 700 The remaining bubbles are considered in bulk.

On the basis of the comparison result of the step (S60), if the rotational speed of the drum 700 is greater than or equal to the reference speed, after the control unit 200 performs the dehydration stroke before the rinse for a time corresponding to the washing course, A driving stop signal for driving the drum 700 is generated (S70).

Accordingly, the drive motor of the power generating unit 400 is stopped by the drive stop signal, the rotation of the drum 700 is stopped and the dehydration stroke before rinsing is finished.

Thereafter, the controller 200 performs a rinsing stroke during a rinsing time corresponding to the washing course (S80), and a detailed operation thereof is as follows.

In step S80 of performing a rinsing stroke, the control unit 200 generates a water supply control signal for supplying a predetermined reference water amount in the drum 700, and applies the water supply control signal to the water supply unit 300. The water supply in the drum 700 by the reference amount of cold water or hot water provided from the external water supply means in accordance with the water supply control signal applied from the control unit 200.

Next, the control unit 200 generates a driving control signal for rotating the drum 700 and applies it to the power generating unit 400, and a driving motor not shown in the power generating unit 400 is removed from the control unit 200. The drum 700 is rotated forward and backward according to the driving control signal applied thereto.

Accordingly, the laundry is lifted by the water flow control means not shown in the drum 700, and the motion of dropping is repeated, and the laundry is rinsed.

When the rinsing time corresponding to the washing course has elapsed, the control unit 200 generates a drainage control signal, and the drainage unit 500 operates according to the drainage control signal to drain back the washing water in the drum 700. do.

For reference, the rinsing stroke as described above may be repeated several times according to the selected washing course.

Thereafter, the controller 200 generates a driving control signal for rotating the drum 700 at high speed (S90), and performs dehydration operation for a time corresponding to the washing course.

That is, the drive motor in the power generator 400 rotates the drum 700 at high speed by the drive control signal, so that the remaining washing water remaining in the laundry is dehydrated.

On the other hand, in the step (S60), if the dehydration speed is less than the reference speed, the control unit 200 generates a drive stop signal for driving the drum 700 (S100).

Accordingly, the driving motor, not shown, of the power generating unit 400 is stopped by the driving stop signal, and the rotation of the drum 700 is stopped to stop the dehydration operation before rinsing.

Then, the control unit 200 generates a water supply control signal for supplying a predetermined reference water in the drum 700 and applies it to the water supply unit 300 (S110-a), the water supply unit 300 is the control unit 200 Cold water or hot water provided from an external water supply means is supplied into the drum 700 by the reference amount according to a water supply control signal applied from the external water supply means.

Thereafter, the control unit 200 generates a drainage control signal and applies it to the drainage unit 500 (S110-b), and the drainage unit 500 operates according to the drainage control signal to externally wash the water in the drum 700. Drain

Accordingly, the foam remaining in a large amount in the laundry in the drum 700 is rinsed by hot water or cold water supplied through the water supply part 300, and discharged to the outside together with the wash water through the drain part 500.

Then, the control unit 200 generates a drive control signal for rotating the drum 700 at a low speed to apply to the power generating unit 400 (S120), the power generating unit 400 by the drive control signal to the By rotating the drum 700 at a rotation speed smaller than the rotation speed of the drum 700 sensed in step S50, the remaining washing water remaining in the laundry is dehydrated at a low speed.

As a result, the remaining bubbles remaining in the laundry are dewatered together with the remaining washing water and discharged from the drum 700 to the outside through the drain part 500.

Thereafter, the controller 200 proceeds to step S40 of starting a dehydration stroke before rinsing.

On the other hand, in the embodiment of the present invention as described above has been described by taking only the case of a washing machine consisting of a drum-type washing tank, those skilled in the art will readily appreciate that the present invention can be applied to all kinds of washing machines.

Therefore, by using the present invention, after performing the washing process, optionally performing an intermediate rinsing process according to the amount of foam remaining in the laundry, effectively removing the foam after washing, extending the mechanical life, dehydration and rinsing before rinsing This has the effect of improving performance.

Claims (3)

In the operation control method of the washing machine to operate the washing machine according to the selected washing course, A washing step of washing laundry by performing a laundry administration according to the selected washing course; Dehydration step before the rinse to detect the amount of foam of the laundry washed in the washing step, the dewatering the laundry in accordance with the detected amount of foam; And a rinsing and dehydrating step of performing a rinsing stroke on the laundry according to the selected washing course, and dehydrating it. According to claim 1, The dewatering step before rinsing, A dehydration start step of discharging the washing water in the washing tank to the outside and starting the dehydration operation before rinsing by rotating the washing tank at a predetermined reference speed; Detecting the number of revolutions of the washing tank and detecting the amount of foam of the laundry by the detected number of revolutions; After a predetermined time has elapsed, the dehydration operation before the rinsing is stopped, and when the amount of the laundry is detected is more than a predetermined reference bubble, an intermediate rinsing stroke is selectively performed, and then the dehydration start step is performed. Operation control method of the washing machine. The method of claim 2, wherein the intermediate rinse stroke, A water supply step of supplying a predetermined reference amount in the washing tank; A drainage step of draining the washing water in the washing tank to the outside; The operation control method of the washing machine, characterized in that consisting of a low speed dewatering step of dewatering the laundry by rotating the washing tank at a low speed for a predetermined time.