KR20050103710A - Water suppling method of wash machine - Google Patents

Abstract

The present invention relates to a rewatering method of a washing machine that additionally rewaters when the water level drops below a specified level during washing or rinsing. When the water level is higher than the normal operation level, If the washing or rinsing continues and the water supply level becomes lower than the operation level due to the failure of the drain valve, the water supply is stopped after the water supply is stopped. Therefore, when the drain valve is broken, excessive consumption of the wash water due to leakage is prevented. There is an advantage that prolongation of the resupply time is prevented.

Description

Water supply method of wash machine

The present invention relates to a rewatering method of a washing machine that additionally rewaters when the water level drops below a specified level during washing or rinsing. In particular, when a water leakage occurs due to a failure of a drain valve during rewatering, The present invention relates to a washing machine refueling method capable of preventing delays and excessive consumption of washing water.

1 is a block diagram illustrating a general washing machine.

As shown in FIG. 1, a general washing machine includes a cabinet 2 forming an exterior and an external tub 6 fixed as hanging by a support member 4 inside the cabinet 2 and containing wash water. ), An inner tube 10 rotatably installed inside the outer tub 6 and having a washing blade 8 installed on a bottom thereof, and disposed below the outer tub 6, wherein the washing blade is disposed below. (8) and a motor 12 for rotationally driving the inner hub 10 and a power transmission device for selectively supplying the driving force of the motor 12 to the washing blade 8 and the inner hub 10 ( 14).

Here, a top cover 18 having a laundry access hole 16 formed in the center of the cabinet 2 is mounted on the upper surface of the cabinet 2, and a drain valve 26 for draining the washing water to the outside of the outer tub 6. ) And the drain hose 28 are installed in communication.

A lid 20 is installed at one side of the top cover 18 to open and close the laundry access hole 16, and a water supply hose 22 supplying the washing water from the outside to the outer tub 6 at a rear side thereof. The water supply valve 24 is installed, and all of the control panels 30 are provided with an operation unit and a display unit such that the operation of the washing machine is controlled by the user and the operation state of the washing machine is displayed to the user.

The control unit 32 is installed on the back of the control panel 30 as described above to control the driving of the washing machine as a whole.

In addition, a cylindrical air chamber 34 is integrally formed on the lower side surface of the outer tub 6, and the air chamber 34 has an air level sensor 36 and air provided on the control unit 32 side. The hose 38 is connected.

The air is filled in the air chamber 34 and the air hose 38, and an inlet and outlet hole 34a through which the washing water is introduced is formed at one side of the connection portion between the air chamber 34 and the outer tub 6. Therefore, when the air pressure of the air chamber 34 and the air hose 38 is changed in accordance with the water pressure of the wash water freshened in the outer tub 6, the water level sensor 36 is the air chamber 34 And senses the air pressure of the air hose 38 to transmit a detection value to the control unit 32, and the control unit 32 determines the current water level of the external tub 6 according to the received detection value. .

On the other hand, the washing machine configured as described above performs the washing operation of the laundry while undergoing the administration of water supply, washing, rinsing, draining, dehydration, and the like through the water supply hose 22 and the water supply valve 24 during water supply. Washing water is supplied from the water source to the outer tub 6, and when washing or rinsing, the laundry is washed by the water flow generated while the washing blade 8 or the inner pot 10 is rotated, The wash water in the outer tub 6 is drained to the outside through the drain valve 26 and the drain hose 28, and when dewatering, the wash water contained in the laundry is rotated at a high speed while the inner tub 10 is rotated at high speed. Will be removed.

Here, the washing or rinsing is performed while the washing water is supplied to the designated level, but if the water level decreases during the washing or rinsing, the washing water is additionally resupplied to the designated level, and then washing or rinsing is performed again. .

2 is a flow chart illustrating a rewatering method of a washing machine according to the prior art.

Re-water supply method of the washing machine according to the prior art is, when washing or rinsing is performed after the washing water is supplied to a predetermined level when water supply, as shown in Figure 2, during the washing or rinsing continuously detect the operation level of the washing water (See S1, S2, S3)

When the detected operation level becomes lower than the designated level at the time of water supply, rewatering is additionally supplied to supply the wash water until the operating level reaches the specified level, and washing or rinsing continues after the refilling is completed. Proceeds to. (See S4, S5, S6)

Of course, even when washing or rinsing is continuously performed after the rewatering, the operation level is continuously detected, and when it is determined that the water level is lowered, the rewatering is performed again.

However, in the conventional method of rewatering the washing machine, when the drain valve 26 is broken and water is leaked, the water level is lowered compared to the designated water level so that the water is supplied again. Excessive consumption, there is a problem that the resupply time is also delayed.

That is, if a leak occurs due to a failure of the drain valve 26, the water level during washing or rinsing is lowered so that the water is resupplied, but a considerable amount of the washing water supplied to the external tub 6 due to the water supply As the water leaks to the outside through the drain valve 26 and the drain hose 28, the amount of rewatering and the time of rewatering are increased.

In addition, there is a problem in that the water is continuously generated through the failed drain valve 26 and re-watering is performed whenever the water level is lowered below the designated level, thereby preventing the normal operation of the washing machine.

Specifically, when the operation level is lowered below the designated level due to the leakage of the drain valve 26, the water is resupplied to the designated level and washing or rinsing proceeds, but the water is resupplied due to the leak of the drain valve 26. As the water level is lowered again, the water supply is re-progressed before the washing and rinsing proceeds, so that operations other than the water supply are difficult to perform.

In addition, since the user is not easy to identify the failure of the drain valve 26 as described above, there is a problem that the user can quickly and accurately respond to the failure of the drain valve 26.

The present invention was created to solve the above problems, an object of the present invention is to stop the rewatering and proceed with dehydration if water leakage occurs due to the failure of the drain valve during rewatering, excessive consumption and washing of the wash water The present invention provides a method for rewatering a washing machine that can prevent a delay in water supply time.

Re-water supply method of the washing machine of the present invention for realizing the above problem is to detect the water level during washing or rinsing step, and if it is determined that the detected water level is lower than the specified water level to re-water supply to the specified water level Rehydration step, the level comparison step of measuring the water level at the time of rewatering and comparing with the operation level, and if it is determined that the measured rewatering level is higher than the operating water level, after the rewatering is carried out, the washing or rinsing is performed and the rewatering is performed. If it is determined that the water level is lower than the operation level, characterized in that it comprises a drive control step of proceeding to dewatering after stopping the rewatering.

If the washing or rinsing is performed for a predetermined time after the rewatering is performed in the driving control step, the water level rediscovery step of rediscovering the operating water level, and the water level difference calculating the water level difference for the redetected operating water level and the designated water level And resupply determination step of continuing washing or rinsing if the calculated water level difference is smaller than the allowable water level difference, and re-watering if the water level difference is larger than the allowable water level difference.

In the driving control step, when the rewatering water level is lower than the operating water level and dehydration proceeds after the rewatering is stopped, an error message for drainage is displayed on the display unit of the washing machine.

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

3 is a block diagram showing a configuration for resupply control of a washing machine according to the present invention.

Here, the same reference numerals as the above-mentioned drawings indicate the same members.

As shown in FIG. 3, a configuration for resupply control of a washing machine according to the present invention includes an operation unit 52 for allowing a driving of the washing machine to be adjusted by a user, and a user input through the operation unit 52. A control unit 54 for controlling the driving of the washing machine according to the intention, a driving unit 56 driven by the control unit 54 to perform respective strokes, a sensing unit 58 for detecting an operating state of the washing machine, The display unit 60 displays an operating state of the washing machine detected by the detecting unit 58.

Here, the drive unit 56 controls the opening and closing of the water supply valve 24 and the drain valve 26 at the time of re-feeding, supplying the washing water to the external tub 6, or in the external tub 6 The wash water is discharged to the outside.

In addition, the detection unit 58 includes a water level detection sensor 36 for detecting the level of the wash water desalted in the external tub 6 to transmit the current water level to the control unit 54.

Figure 4 is a flow chart illustrating a water resupply method of the washing machine according to the present invention.

In the washing water supply method of the washing machine according to the present invention, as shown in FIG. 4, when washing or rinsing is performed after water supply is performed to a predetermined level, the level of operation during washing or rinsing is continuously detected. (See S51, S52, S53)

That is, when the wash water is supplied to the designated water level at the time of water supply, the process proceeds, but if the wash water is absorbed in the laundry or leaks and leaks occur, the operation level is lowered below the designated water level during washing or rinsing. Is to continuously detect the water level change in the outer tub (6) during washing or rinsing.

In the rewatering step, if it is determined that the operation level detected in the water level detection step is lower than the designated level for washing or rinsing, the rewatering to supply the washing water to the designated level is performed (see S54 and S55).

That is, if the operation level of the washing water during the washing or rinsing is detected by the detection unit 58 at a lower level than the designated level, the control unit 54 sets the resupply water so that the operation level can be reached to the specified level. In addition, the driving unit 56 opens the water supply valve 24 so that the washing water is additionally supplied to the external tub 6.

In the water level comparison step, the water level is changed as the water level is changed in the rewatering step, and then compared with the operation level detected in the water level detection step (see S56 and S57).

In the driving control step, if it is determined that the water supply level measured in the water level comparison step is higher than the operating water level, the water supply is carried out after the water supply is carried out, and if the water supply level measured in the water level comparison step is lower than the operating water level, After stopping the water supply, it proceeds with dehydration (see S58, S59, S65, S66, S67).

Therefore, since whether or not the progress of the refilling water is determined according to the comparison value between the refilling water level and the operating water level, the rewatering water level is preferably measured at the beginning of the rewatering water so as to prevent unnecessary rewatering in advance.

On the other hand, since the water level is higher than the operation level means that the water level is increased to the designated water level due to the water supply, the water supply is normally performed until the water supply level reaches the designated water level, and when the water supply is completed, Washing and rinsing are performed.

On the other hand, since the level of the rewatering water is lower than the operating water level means that the amount of the washing water leaked and leaked more than that of the water being rewatered, and thus the water level was lowered, the rewatering was stopped to prevent the supply of unnecessary washing water. After a certain period of time, the dehydration process will take place.

When the amount of wash water leaks more than the wash water re-supplied as described above, when the wash water is naturally drained through the drain valve 26 and the drain hose 28 due to the failure of the drain valve 26, Rewatering is stopped to prevent excessive wash water consumption.

As the washing machine stops driving for a predetermined time, the wash water depleted in the outer tub 6 is drained through the drain valve 26, and then a dehydration process is performed to completely wash water contained in the laundry. Removed. Therefore, the laundry is not prevented from being immersed in the wash water for a long time or prevented from inside the washing machine in a wet state, whereby discoloration and discoloration of the laundry is minimized.

At this time, an error message for drainage is displayed on the display unit 60 of the washing machine, and the user can confirm the error message of the display unit 60 to quickly respond to a failure of the drain valve 26. The display unit 60 is provided with a light emitting diode (LED) or a liquid crystal display (LCD) to display an error message for drainage, and of course, an alarm sound may also be sounded together.

In the water level re-sensing step, when washing or rinsing is performed after the water supply is performed in the driving control step, the sensing unit 58 re-detects the operation level in a state where the washing or rinsing is performed for a predetermined time. (See S60, S61)

In the level difference calculation step, the control unit 54 calculates the level difference between the operation level and the designated level by comparing the operation level resensed in the level redetection step with a specified level (see S62).

In the resupply determination step, if the water level difference calculated in the water level difference calculation step is smaller than the allowable water level difference, washing or rinsing is continued, and when the calculated water level difference is larger than the allowable water level difference, rewatering is re-executed. See S64)

That is, if the water level difference calculated in the water level difference calculation step is within the allowable water level difference, the washing effect or the rinsing process is continued as it is determined that there is no adverse effect on the washing effect even if the administration is normally performed, but the water level difference calculated in the water level difference calculating step is allowed. If the difference is exceeded, it is determined that the washing effect is adversely affected during the administration, and then the flow returns to the resupply step and resupply is performed.

The allowable water level difference is a maximum water level difference between the operating water level and the designated water level to ensure the washing performance for the laundry, even if the operating water level is lower than the specified water level, and is preset according to the design conditions when the washing machine is manufactured. And stored in the controller 54.

In the resupply determination step as described above, by comparing the allowable water level difference and the calculated water level difference, it is determined whether the washing performance can be secured even in a state where the water supply is not performed.

Re-water supply method of the washing machine according to the present invention operated as described above, when the re-water supply level is higher than the normal operating water level when re-feeding, washing or rinsing continues after the re-water supply is performed and the re-water supply level is broken of the drain valve When the water level is lower than the operation level, since rewatering is stopped and dehydration proceeds, it is possible to prevent excessive consumption of the wash water due to leakage when the drain valve is broken, and prolongation of the rewatering time is prevented.

In addition, if the washing or rinsing proceeds after the rewatering is performed as described above, if the water level difference for the rewatered operation level and the designated level is smaller than the allowable level difference, the washing or rinsing continues, resulting in a slight drop in the water level. Frequent re-watering is prevented in advance, so there is an advantage in that the operating efficiency and operating stability of the washing machine are improved.

In addition, when dehydration proceeds after the rewatering is stopped due to a failure of the drain valve as described above, an error message for drainage is displayed on the display unit of the washing machine, so that the failure of the drain valve is easily and accurately identified. There is an effect of coping with the failure quickly.

1 is a configuration diagram showing a general washing machine,

2 is a flow chart illustrating a rewatering method of a washing machine according to the prior art;

3 is a block diagram showing a configuration for water supply control of the washing machine according to the present invention;

Figure 4 is a flow chart illustrating a water resupply method of the washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

52: operation unit 54: control unit

56: drive unit 58: detection unit

60: display unit

Claims (3)

A water level detection step of detecting an operation level during washing or rinsing; A rewatering step of rewatering to a predetermined level when it is determined that the detected operating level is lower than the predetermined level; A level comparison step of measuring the water level at the time of refueling and comparing it with the operation level; If it is determined that the measured water supply level is higher than the operating water level, the washing or rinsing process is performed after the water supply is refilled, and if it is determined that the water supply level is lower than the operating water level, the driving control step includes stopping the water supply and proceeding with dehydration. Resupply method of the washing machine characterized in that the configured. The method of claim 1, If the washing or rinsing is performed for a predetermined time after the rewatering is performed in the driving control step, the water level rediscovery step of rediscovering the operating water level, and the water level difference calculating the water level difference for the redetected operating water level and the designated water level And resupply determination step of continuing washing or rinsing if the calculated water level difference is smaller than the allowable water level difference and re-feeding if the water level difference is larger than the allowable water level difference. The method of claim 1, In the driving control step, when the rewatering water level is lower than the operating water level and the dewatering proceeds after the rewatering is stopped, an error message for drainage is displayed on the display unit of the washing machine.