KR20000055285A - Bubble exclusion method of drum washing machine - Google Patents

Abstract

PURPOSE: A foam removing method for laundry machine having a drum is provided to achieve an improved foam removing performance by performing an additional rinsing operation when an excessive amount of foam is produced. CONSTITUTION: A method comprises a first step of draining contaminated laundry wastewater from a washer tub to reach a drainage level by driving a drainage pump after washing and rinsing operations, a second step of counting the time period taken for drainage in the first step, a third step of judging whether an excessive amount of foam is produced by comparing the time period counted in the second step with a reference drainage time period preset in a controller, and a fourth step of removing the foam remaining in the washer tub by performing an additional rinsing operation if it is judged in the third step that an excessive amount of foam is produced.

Description

Foam washing method of drum washing machine {BUBBLE EXCLUSION METHOD OF DRUM WASHING MACHINE}

The present invention relates to a drum washing machine in which washing, rinsing, dehydration and drying are performed automatically by a drop caused by the rotation of the drum, and particularly, whether the foam is excessively generated by the drainage time and the water level data during normal dehydration after washing / rinsing. It relates to a foam washing method of the drum washing machine to remove the foam smoothly.

In general, as shown in FIG. 1, the drum washing machine is provided with a detergent container 3 and an operation unit 5 on the front of the drum washing machine main body 1, and may be not shown on the rear surface of the main body 1. Hot and cold water supply valves (7, 8) are installed to supply hot and cold water.

A tub 9 is installed in the main body 1, and a drum 11 that rotates at a high speed to wash and dewater laundry loaded therein is installed in the tub 9, and on the front surface of the tub 9. The plate 15 is installed to bind the door 13 to be opened and closed when the laundry is put into the drum 11, and the front of the tub 9 is washed and dehydrated when the drum 11 rotates at high speed. The counterweight 19 which prevents the vibration which generate | occur | produces is provided.

An air vent 17 is installed at an upper end of the diaphragm 15 so as to introduce dry air during the drying operation of the laundry. A drying heater 21 for drying air introduced from the outside is provided in the air vent 17. A fan motor 23 is installed at one side of the drying heater 21 to blow high heat generated by the drying heater 21 to the drum 11 through the diaphragm 15.

The outer circumferential surface of the tub (9) is connected to a condensing hose (25) for supplying cold water to condense dry air by the high temperature of the drying heater (21) introduced into the tub (9), the tub (9) On the lower side, a three-phase induction motor 27 (hereinafter referred to as a motor), which is a power generating means for forward and reverse rotation of the drum 11, is provided.

A drain pump 29 for discharging the wash water in the tub 9 through a drain hose (not shown) is installed at the bottom of the rear surface of the main body 1, and the tub 9 is disposed at the front lower part of the main body 1. The filter 31 which prevents the drainage pump 29 from being blocked by washing residues, such as residual water and dirt, which flows out), and drains the wash water when the drainage pump 29 cannot be operated due to a power failure. 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 flows into the drum 11. The inside of the drum 11 has a water flow regulating member 11b attached to the laundry net by dropping each other at regular intervals 120 ° apart and dropping while washing the laundry.

In the conventional drum washing machine configured as described above, the user first puts laundry (clothing) into the drum 11, and then manipulates the operation unit 5 to perform the desired washing conditions (type of washing, boiling temperature, washing course, drying time). And the like, and the operation button is turned on, the washing water supplied from the tap is not shown and is supplied to the tub 9 through the hot / cold water valves 7 and 8.

When the wash water is supplied to the tub 9, the drum 11 rotates at high speed while the motor 27 is driven to rotate at a high speed, so that water flow is formed in the washed water and at the same time, a physical force is applied to the laundry. When adsorbed or foreign matters are separated, they are washed, rinsed, dehydrated and dried.

By the way, in the conventional drum washing machine, as the dehydration RPM (rotational speed) increases during normal dehydration after rinsing, the water / washing product remaining in the laundry is drained to the drain pump 29 at one time. If more than the standard amount or a detergent that generates a lot of foam is used more than the amount of foam is drained by the drain pump 29, the foam leaks to the front of the drum washing machine (for example, detergent container, etc.) There was this.

Accordingly, the present invention has been made to solve the above-mentioned problems, counter the drainage time that changes depending on the amount of foam after washing / rinsing or by detecting the water level data that changes depending on the amount of foam when entering normal dehydration foam The purpose of the present invention is to provide a method for removing the foam of the drum washing machine, which determines whether the excessive occurrence of the foam, and when the foam is excessive, performs an additional rinsing stroke to normally drain the foam.

Foam washing method of the drum washing machine according to the present invention in order to achieve the above object, in the control method of the drum washing machine to perform the washing and rinsing stroke by supplying the wash water in the tub, by driving the drain pump after washing and rinsing A drainage step of draining the contaminated wash water in the tub to a drainage level, a drainage time counter step of counting the time for washing the wash water in the drainage step, and a drainage time counted in the drainage time counter step Compared with the standard drainage time, the foam excess discrimination step for determining whether the foam is excessive, and if it is determined that the foam is excessive in the foam excess discrimination step, additionally perform a rinsing stroke to remove the foam in the tub. Characterized in consisting of steps.

In addition, the foam washing method of the drum washing machine according to another embodiment of the present invention, in the control method of the drum washing machine to perform washing and rinsing stroke by supplying the washing water to the tubne, contaminated washing in the tub after washing and rinsing A drainage step of draining water, an intermittent dehydration step of driving an intermittent dehydration process by driving the motor intermittently when the wash water is drained in the drainage step, and rotating the motor at a high speed when the intermittent dewatering step is completed in the intermittent dewatering step. A normal water level step for performing a normal dehydration stroke, a water level detection step for detecting water level data that changes according to the amount of bubbles during the normal dewatering step, and a water level data detected in the water level detection step, the reference water level preset in the control means Compared with the data to determine whether there is excessive foaming bubbles and the foam excess discrimination step, and the foam in the foam discrimination step If it is determined that the generation is to perform a rinsing cycle it is further made of a foam removing step of removing bubbles in the tub, characterized.

1 is a perspective view of a general drum washing machine,

2 is a block diagram of a control device of a drum washing machine according to the present invention;

3A and 3B are flowcharts showing a bubble removing control operation procedure of the drum washing machine according to the first embodiment of the present invention;

4A and 4B are flowcharts illustrating a bubble removing control operation procedure of the drum washing machine according to the second embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

7,8: Hot and cold water supply valve 9: Tub

11: drum 27: motor

29: drain pump 104: control means

106: water supply valve driving means 110: motor driving means

112: drainage pump driving means 114: display means

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

Drum washing machine according to the present invention is the same as the conventional configuration shown in Fig. 1, the same name and the same reference numerals are omitted to duplicate description.

As shown in Fig. 2, the power supply means 100 converts a commercial AC voltage supplied from an AC power supply terminal (not shown) into a predetermined DC voltage required for the operation of the drum washing machine, and outputs it to the respective driving circuits. 102 is composed of an operation unit 5 and the like provided with a plurality of function buttons to input the washing conditions (type of washing, boiling temperature, washing course, drying time, etc.) desired by the user.

The control means 104 initializes the drum washing machine by receiving the DC voltage output from the power supply means 100, and also operates the drum washing machine according to the operation command signal input by the driving operation means 102. As a microcomputer to control the control means 104, the control means 104 counters the drainage time, which varies depending on the amount of foam after washing / rinsing, and compares it with a preset reference drainage time or changes the water level depending on the amount of foam at the time of normal dehydration. By comparing the data with the preset reference water level data, it is determined whether the foam is excessive, and when the foam is excessive, the rinse stroke is additionally performed without performing the normal dehydration stroke.

The water supply valve driving means 106 supplies the hot / cold water supply valves 7 and 8 to supply the hot water and the cold water supplied from the tap water not shown in the tub 9 under the control of the control means 104. The driving control and the water level detecting means 108 converts the frequency of the frequency oscillation circuit inside the water level sensor when the pressure changes as the washing water is supplied into the tub 9 or the amount of foam at the time of normal dehydration. This is a common way of detecting water levels.

In addition, the motor driving means 110 receives the control signal output from the control means 104 and the forward and reverse rotation control of the motor 27 to wash and dehydrate the laundry, the drain pump driving means 112 is the control means ( Receiving the control signal output from the 104 to drive the drain pump 29 to discharge the wash water in the tub (9) to the outside.

In addition, the display means 114 not only displays the washing condition and the operation state input by the driving operation means 102, but also displays an error (excessive foaming) when an abnormality occurs in the drum washing machine.

Hereinafter, the operation and effect of the bubble removing method of the drum washing machine configured as described above will be described.

First, the foam removing method according to the first embodiment of the drum washing machine according to the present invention will be described with reference to FIGS. 3A and 3B.

3A and 3B are flowcharts showing the debubbling control operation procedure of the drum washing machine according to the first embodiment of the present invention, in which S denotes a step (STEP).

When power is applied to the drum washing machine, the power supply means 100 converts the power supply voltage of the commercial AC power supplied from an AC power supply terminal (not shown) into a predetermined DC voltage required for driving the drum washing machine, thereby driving each circuit and control means ( Output to 104).

Therefore, the control means 104 receives the DC voltage output from the power supply means 100 to initialize the drum washing machine.

At this time, in step S1, the user inputs laundry (load) into the drum 11, and inputs the desired washing conditions (type of washing, washing temperature, washing course, drying time, etc.) by the driving operation unit 102. When the button is turned on, in the stem S2, the control means 104 outputs a control signal to the water supply valve driving means 106 to supply the tub 9 with the wash water necessary for sensing the amount of laundry put into the drum 11. .

Accordingly, the water supply valve driving means 106 receives the control signal output from the control means 104 to open (on) the hot / cold water valves 7 and 8 to supply hot or cold water supplied from the tap water. The washing section is supplied with water in the tub 9.

At this time, in step S3, the water level sensing unit 108 detects the water level rising by the water supply operation according to the opening of the hot / cold water valves 7 and 8, and outputs it to the control unit 104. As the pressure rises, the frequency of the frequency oscillation circuit inside the water level sensor is reduced according to the principle that the control unit 104 receives the changing frequency and detects the water level of the wash water.

Subsequently, in step S4, it is determined whether the water level detected by the water level detecting means 108 is supplied to a predetermined water level (washing water level required to detect the amount of laundry) set in advance in the control means 104, and the water level is set. If the water is not supplied until (NO), the flow returns to the step S2 and the hot and cold water supply valves 7 and 8 are opened until the set water level is reached. do.

As a result of the discrimination in step S4, when water is supplied up to the set water level (YES), the flow advances to step S5, and the control means 104 controls the water supply valve driving means 106 to control the hot / cold water supply valves 7 and 8. Closes (off) and outputs a control signal to the motor driving means 110 to drive the motor 27.

Therefore, an AC current is supplied from the AC input terminal to the motor 27, and the motor 27 is rotated left or right, so that the drum 11 is reversed left and right, and water flow is formed in the supplied wash water. The water level is absorbed into the washing water lower than the set water level according to the amount of laundry, the frequency increase according to the washing level is lower depending on the amount of laundry.

Accordingly, in step S6, the control means 104 counts the time at which the motor 27 is reversed left and right by a built-in counter to determine whether a predetermined time (time required for determining the amount of laundry) has elapsed, and thus, for a predetermined time. If this has not elapsed (NO), the process returns to the step S5 and repeats the operation of step S5 or less while continuously stirring the motor 27 left and right for a predetermined time.

As a result of the determination in step S6, when a predetermined time has elapsed (YES), the control means 104 controls the motor driving means 110 and stops left and right stirring of the motor 27 after the predetermined time has passed. In this case, the amount of water (load amount) of the laundry is sensed by sensing the change in water level, and then the washing time, water flow time, rinsing time, washing water amount and dehydration time, etc. suitable for the load are determined.

Subsequently, in steps S8 to S9, the control means 104 opens (turns on) the hot / cold water valves 7 and 8 to complete the water supply in the tub 9 by the determined amount of wash water, and then the hot / cold water valve Close (off) (7, 8) and drive motor 27.

As the motor 27 is driven, the drum 11 rotates at high speed as the drum 11 is inverted left and right to form a stream of water in the water to be supplied to the wash water, and at the same time, physical force is applied to the laundry to separate the adsorbed matter or foreign matters from the laundry, The rinsing stroke is performed, and in step S10, the control means 104 outputs a control signal to the drain pump driving means 112 to drain the contaminated washing water in the tub 9 during washing and rinsing.

Therefore, the drain pump driving means 112 receives the control signal output from the control means 104 and drives the drain pump 29 to drain the contaminated wash water in the tub 9 through the drain hose (not shown). Drain to the outside.

Subsequently, in step S11, the control means 104 starts to counter the time by which the drain pump 29 is driven to drain the contaminated washing water by a built-in counter. In step S12, the driving of the drain pump 29 is performed. The water level lowered by the drainage operation according to the detected in the water level detecting means 108 and outputs to the control means (104).

When the pressure decreases as the wash water is drained, the frequency of the frequency oscillation circuit inside the water level sensor is increased according to the principle that the control unit 104 receives a change in frequency and detects the wash water level to a predetermined drainage level. If it is determined that the water is drained, and if it is not drained to the drainage level (NO), the flow returns to the step S11, and the drainage pump 29 is driven until the drainage level is reached to continue draining while the operation of step S11 and below is continued. Repeat.

As a result of the discrimination in step S12, when it is drained to the drainage level (YES), the flow advances to step S13, and the control means 104 determines whether the counted drainage time is equal to or greater than the preset reference drainage time Ts.

As a result of the determination in step S13, when the drainage time is more than the standard drainage time Ts (YES), it is determined that the drainage time is longer than the normal condition due to the large amount of bubbles, and the control means 104 proceeds to step S14. Outputs a control signal to the water supply valve driving means 106 to supply the wash water in the tub 9 to further perform the rinsing stroke.

Therefore, the water supply valve driving means 106 receives the control signal output from the control means 104 to open (on) the on / off water supply valves 7 and 8 to wash the hot or cold water supplied from the tap water. Water is supplied to the tub 9.

When the wash water is completed in the tub 9, the flow proceeds to step S15, and the control means 104 closes (off) the on / off water supply valves 7 and 8, and drives the motor 27 to drive the motor 27. The control signal is output to (11).

Accordingly, the motor driving means 110 receives the control signal output from the control means 104 and rotates the motor 27 so that the drum 11 rotates at high speed while the drum 11 is inverted left and right to form water flow in the wash water. At the same time, a physical force is applied to the laundry and a rinse is performed to separate the debris remaining in the laundry.

When the rinsing is performed in accordance with the driving of the motor 27, the flow proceeds to step S16 and the drain pump driving means 112 receives the control signal output from the control means 104 and drives the drain pump 29 to drive the tub 9 Drain the contaminated wash water to outside through drain hose.

When the drainage is completed, the motor driving means 110 rotates the motor 27 at high speed according to the control of the control means 104 in step S17 to dehydrate the laundry by centrifugal force generated while the drum 11 rotates at high speed. In step S18, the next operation of the drum washing machine is performed according to the control of the control means 104, and then the operation is terminated.

As a result of the determination in step S13, when the drainage time is not equal to or greater than the reference drainage time Ts (NO), it is determined that the drainage proceeds smoothly because there is little or no bubble, and the control means 104 proceeds to step S19. After performing the normal dehydration stroke in accordance with the preset program, the control means 104 performs the normal dehydration stroke in accordance with the preset program, and then proceeds to step S18 and repeats the operation of step S18 or less.

Next, the foam removing method according to the second embodiment of the drum washing machine according to the present invention will be described with reference to Figs. 4A and 4B.

4A and 4B are flowcharts showing the debubbling control operation procedure of the drum washing machine according to the second embodiment of the present invention. In Figs. 4A and 4B, S indicates a step.

When the power of the drum washing machine is applied, the control means 104 receives the DC voltage output from the power supply means 100 to initialize the drum washing machine.

At this time, in step S21, the user inputs the laundry (load) into the drum 11, and inputs the desired washing conditions (type of washing, washing temperature, washing course, drying time, etc.) by the operation operation means 102. When the button is turned on, in step S22, the control means 104 outputs a control signal to the water supply valve driving means 106 so as to supply the washing water necessary for sensing the amount of laundry put into the drum 11 into the tub 9. .

Accordingly, the water supply valve driving means 106 receives the control signal output from the control means 104 to open (on) the hot / cold water valves 7 and 8 to supply hot or cold water supplied from the tap water. Washing water is supplied to the tub (9).

At this time, in step S23, the water level detecting means 108 which is raised by the water supply operation according to the opening of the hot / cold water supply valves 7 and 8 is detected and outputted to the control means 104.

Subsequently, in step S24, it is determined whether the water level detected by the water level detecting means 108 is supplied to the control level 104 to the preset water level, and when the water level is not supplied to the setting water level (NO), The flow of steps S22 and below is repeated while the water supply is continued by opening the hot and cold water supply valves 7 and 8 until the flow returns to S22 and the set water level is reached.

As a result of the determination in step S24, when water is supplied up to the set water level (YES), the flow advances to step S25, and the control means 104 controls the water supply valve driving means 106 to control the hot / cold water supply valves 7 and 8. Closes (off) and outputs a control signal to the motor driving means 110 to drive the motor 27.

Therefore, an AC current is supplied from the AC input terminal to the motor 27, and the motor 27 is rotated left or right, so that the drum 11 is reversed left and right, and water flow is formed in the supplied wash water. The water level is absorbed into the washing water lower than the set water level according to the amount of laundry, the frequency increase according to the washing level is lower depending on the amount of laundry.

Accordingly, in step S26, the control means 104 counts the time at which the motor 27 is reversed left and right by a built-in counter to determine whether a predetermined time (time required for determining the amount of laundry) has elapsed, and then, for a predetermined time. If this has not elapsed (NO), the process returns to the step S25 and the operation of step S25 or less is repeated while the motor 27 is left and right stirred continuously for a predetermined time.

As a result of the determination in step S26, when a predetermined time has elapsed (YES), the control means 104 controls the motor driving means 110 to stop the left and right stirring of the motor 27 after the predetermined time has elapsed. At this time, the amount of water level change is sensed to determine the amount of load (load amount), and then the washing time, water flow time, rinsing time, washing water amount and dehydration time, etc. suitable for the load are determined.

Subsequently, in steps S28 to S29, the control means 104 opens (turns on) the hot / cold water valves 7 and 8 to complete the water supply in the tub 9 by the determined amount of wash water, and then the hot / cold water valve Close (off) (7, 8) and drive motor 27.

The drum 11 rotates at high speed as the drum 11 is inverted in accordance with the driving of the motor 27 to form a water stream in the wash water supplied to the wash water, and at the same time, a physical force is applied to the laundry to separate the adsorbed matter or foreign matters from the laundry, The rinsing stroke is performed, and in step S30, the control means 104 outputs a control signal to the drain pump driving means 112 to drain the contaminated washing water in the tub 9 during washing and rinsing.

Therefore, the drain pump driving means 112 receives the control signal output from the control means 104 to drive the drain pump 29 to drain the contaminated wash water in the tub 9 through the drain hose (not shown). Drain to the outside.

Subsequently, in step S31, the control means 104 performs an intermittent dewatering process of intermittently dehydrating the laundry by driving the motor 270 intermittently. In step S32, the motor driving means 110 controls the control of the control means 104. Accordingly, by rotating the motor 27 at a high speed, the dehydration operation of the laundry is performed at a high speed by the centrifugal force generated while the drum 11 rotates at a high speed.

At this time, in step S33, the control means 104 counts the normal dehydration time at which the motor 27 rotates at high speed to determine whether the dehydration is finished, and if it is not the end of dehydration (NO), the dehydration RPM (rotation speed) As this rises, the water / detergents remaining in the laundry are drained through the drain pump 29 at one time, and the flow proceeds to step S34, where the water level detecting unit 108 senses the changing water level after the normal dehydration entry. Output to

This, when the pressure changes in accordance with the amount of foam receives a change in the frequency according to the principle that the frequency of the frequency oscillation circuit inside the water level sensor in the control means 104 detects the water level data (H).

Accordingly, in step S35, the control means 104 determines whether the water level data H detected by the pressure of the foam is equal to or greater than the predetermined reference water level data Hs, so that the water level data H is the reference water level data Hs. ) If it is not abnormal (NO), it is determined that the amount of bubbles is small, and the flow returns to step S32, whereby the control means 104 continuously performs the operation of step S32 or less while continuing to perform the normal dehydration stroke according to the preset program. Repeat.

As a result of the determination in step S35, when the water level data H is equal to or higher than the reference water level data Hs (YES), it is determined that there is excessive foaming, and the flow advances to step S36. The control means 104 further adds a rinsing stroke. A control signal is output to the water supply valve driving means 106 to supply the wash water in the tub 9 for performing.

Therefore, the water supply valve driving means 106 receives the control signal output from the control means 104 to open (on) the on / off water supply valves 7 and 8 to wash the hot or cold water supplied from the tap water. Water is supplied to the tub 9.

When the wash water is completed in the tub 9, the flow proceeds to step S37, and the control means 104 closes (off) the on / off water supply valves 7 and 8, and drives the motor 27 to drive the motor 27. The control signal is output to 110.

Accordingly, the motor driving means 110 receives the control signal output from the control means 104 and rotates the motor 27 so that the drum 11 rotates at high speed while the drum 11 is inverted left and right to form water flow in the wash water. At the same time, a physical force is applied to the laundry to rinse to separate the detergents remaining in the laundry.

When the rinsing is performed according to the driving of the motor 27, the process proceeds to step S38, and the drain pump driving means 112 receives the control signal output from the control means 104 and drives the drain pump 29 to drive the tub 9. Drain the contaminated wash water to outside through drain hose.

When the drainage is completed, in step S39, the motor driving means 110 rotates the motor 27 at high speed according to the control of the control means 104 to dehydrate the laundry by centrifugal force generated while the drum 11 rotates at high speed. In step S40, the following operation of the drum washing machine is performed according to the control of the control means 104, and then the operation ends.

As a result of the discrimination in step S33, in the case of the completion of dehydration (YES), the flow advances to step S40, and the control means 104 repeatedly performs the operation of step S40 or less while performing the next stroke of the drum washing machine according to a predetermined program. do.

According to the bubble washing method of the drum washing machine according to the present invention as described above, by countering the drainage time that changes depending on the amount of foam after washing / rinsing or by detecting the water level data that changes depending on the amount of foam when entering normal dehydration Judging whether the foam is excessive, and when the foam is excessive, the rinse stroke is additionally performed to normalize the foam, thereby effectively removing the foam.

Claims (2)

In the control method of the drum washing machine to supply washing water in the tub to perform the washing and rinsing stroke, A drainage step of draining the contaminated wash water in the tub to a drainage level by driving a drainage pump after washing and rinsing; A draining time counter step of countering the time for washing the water in the draining step; A bubble excess determination step of judging whether there is excessive foaming by judging and comparing the drainage time counter counted in the drainage time counter step with a reference drainage time set in the control means; The foam washing method of the drum washing machine, characterized in that the foam removing step of removing the bubbles in the tub by additionally performing a rinsing stroke, if it is determined that the foam is excessive in the foam excess determination step. The method of claim 1, The foam washing method of the drum washing machine characterized in that the normal dehydration stroke is immediately performed if it is determined that the foam is not excessive in the foam discrimination step.