KR20190075620A - Method for controlling washing machine - Google Patents

Abstract

According to the present invention, a method for controlling a washing machine comprises: a step of measuring a washing water supply amount; a step of determining a cloth by classifying the cloth as a first cloth if the measured water supply amount is lower than a first water supply amount, as a second cloth if higher than or equal to the first water supply amount and lower than a second water supply amount, and as a third cloth if higher than or equal to the second water supply amount; and a step of performing a first drying cycle if the determined cloth is the first cloth, a second drying cycle if the cloth is the second cloth, and a third drying cycle if the cloth is the third cloth. A cloth can be easily determined to store drying time and drying energy in accordance with the cloth.

Description

[0001] METHOD FOR CONTROLLING WASHING MACHINE [0002]

The present invention relates to a control method of a washing machine.

Generally, a washing machine is a device that processes laundry through various operations such as washing, dehydrating and / or drying. The washing machine includes a tub containing water and a drum rotatably installed in the tub, and the drum has a plurality of through holes through which water passes.

When a user selects a desired course by using the control panel in a state where laundry such as clothes or bedding is put in the drum, a predetermined algorithm corresponding to the selected course is executed, whereby the laundry is drained, washed, rinsed, And so on.

The washing operation is generally divided into a washing cycle, a rinsing cycle and a dehydration cycle. The progress of such a stroke can be confirmed through the display provided on the control panel.

The washing cycle is to supply the detergent together with water into the drum to remove contamination from the laundry by utilizing the chemical action by the detergent and the physical action by the pulsator and / or rotation of the drum.

The rinsing step is to remove the detergent absorbed in the washing step by supplying clean water in which the detergent is not dissolved into the drum and rinsing the cloth. A fiber softening agent may be supplied together with water during the rinsing cycle.

After the rinsing step is completed, the dewatering step is to spin the drum at a high speed to dewater the dough. Normally, all the operations of the washing machine are completed by completing the dewatering process, but in the case of the washing machine combined with a drying machine, a drying cycle can be further added after the dewatering process.

The washing operation of the washing machine is set according to the amount of laundry put into the drum. For example, the water level, the washing strength, the drainage time, the dehydration time, and the like are set according to the replenishing amount.

However, there is a problem in that the washing performance varies not only with the amount of the laundry, but also with the porcelain, so that when setting the washing operation, only the laundry amount is taken into consideration, sufficient washing performance can not be expected.

For example, in the case of a water-repellent functional material having a low moisture content (a ratio of water containing water), sufficient washing can be performed even with a small amount of water, and conversely, In the case of this high capsule, the bulk amount needs more water even if it is detected low. Therefore, it is necessary to judge the porosity according to the porosity and to configure the setting of the washing operation in an appropriate manner according to the porosity.

In addition, in the case of a washing and drying machine for washing and drying, unlike a dryer, there are many cases in which there is no dedicated sensor for judging the degree of drying, which can detect the degree of drying, and the values representing the initial weight of the laundry are used, Termination.

For example, in the case of a conventional washing and drying machine for washing and drying, the initial drying time is determined mainly by weight of fabric after dehydration. However, this method has a limitation in reflecting the characteristics of the porcelain to the drying, so that unnecessary drying time and energy may be injected into a well-dried cloth.

A first object of the present invention is to provide a control method of a washing machine capable of easily detecting a discharged amount in a washing step and determining a porosity.

A second object of the present invention is to provide a control method of a washing machine capable of reducing drying energy and shortening a drying time.

According to another aspect of the present invention, there is provided a control method for a laundry processing apparatus, including: a casing; A tub disposed in the casing; A drum rotatably installed in the tub and receiving laundry; A laundry processing apparatus comprising:

Sensing a quantity of the drum in the drum;

Performing water supply of washing water to a set water level in the drum;

Measuring a water supply amount;

Determining a porosity by dividing into a first porosity when the measured water supply amount is less than the first water supply amount, a second porosity when the first water supply amount is less than the second water supply amount, and a third porosity when the water supply amount is more than the second water supply amount;

The washing cycle is terminated, and a rinsing and dewatering cycle is performed;

A first drying step when the determined porosity is the first porosity, a second drying stroke when the porosity is the second porosity, and a third drying stroke when the porosity is the third porosity.

The water supply amount can be measured by using a flow meter provided in the washing machine. In order to supply water up to the set water level, refill water can be performed after the initial water supply.

The compressor frequency, the control temperature of the drying cycle, and / or the drying operation time of the drying cycle may be different from each other in the first drying step, the second drying step and the third drying step.

The drying operation time of the third drying step may be longer than the drying time of the second drying step and the drying time of the first drying step may be longer than the drying time of the second drying step.

According to the control method of the washing machine of the present invention, one or more of the following effects can be obtained.

First, when the washing water is supplied to the washing tub after the detection of the washing amount in the washing step, the water amount is measured to provide a simple and easy classification of the porosity according to the water amount.

Second, it provides the effect of determining the amount of water by using the flow meter in the product without changing the mechanism, and determining the porosity according to the amount of water supplied.

Third, the drying time is varied according to the measured porosity, thereby reducing unnecessary drying energy and drying time.

1 is a perspective view showing the appearance of a washing machine.
2 is a perspective view showing the appearance of the washing machine body including the flow meter.
3 is a flowchart showing a general method of controlling a washing machine according to an embodiment of the present invention.
4 is a flowchart illustrating a control method for determining a porosity according to an amount of water and performing a drying process according to a porosity according to an embodiment of the present invention.
5 is a table showing the relationship between the moisture content (absorption regain) and the heat of wetting according to the material
FIG. 6 is a table summarizing the water amount according to the JEMA standard according to the experiment and the water amount according to the different materials according to the re-watering.

It is to be understood that the embodiments described below are provided for illustrative purposes only, and that the present invention may be embodied with various modifications and alterations.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention. In addition, the attached drawings are not drawn to scale in order to facilitate understanding of the invention, but the dimensions of some of the components may be exaggerated.

The first and second terms used in the present application can be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

Furthermore, the terms used in the present application are used only to describe specific embodiments and are not intended to limit the scope of the rights. The singular expressions include plural expressions unless the context clearly dictates otherwise.

It is to be understood that the terms such as "comprising", "comprising" or "comprising" in this application are intended to specify the presence of stated features, integers, steps, operations, components, But do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

1 is a perspective view showing the appearance of a washing machine.

2 is a perspective view showing the appearance of the washing machine body including the flow meter.

1 and 2, the washing machine includes a casing 10 forming an outer appearance, a tub 21 installed in the casing 10, a tub 21 rotatably installed in the tub 21, And a drum 20 for receiving the laundry.

The casing 10 forms an outer appearance of the washing machine. A tub 21 for storing wash water is installed in the casing 10, and a drum 20, in which laundry is received, do. A heater for heating the water contained in the tub 21 may be further provided.

The casing 10 includes a cabinet 11 forming an outer appearance of the washing machine and having a front and an upper surface opened, a base supporting the cabinet 11, a laundry inlet / And a top cover 13 provided on the upper side of the cabinet 11. The front cover 12 includes a front cover 12, The front cover 12 is rotatably provided with a door 16 for opening and closing the laundry access hole.

The door 16 may be provided with a glass 17 so that the laundry inside the drum 20 can be seen. The glass 17 may be formed in a convex shape and the tip of the glass 17 may protrude to the inside of the drum 20 in a state in which the door 16 is closed.

The detergent box accommodates additives such as preliminary or main laundry detergent, fabric softener, bleaching agent and the like, and can be detachably provided in the casing 10.

The tub 21 is suspended from the top cover 13 by a spring so that vibration generated when the drum 20 rotates can be buffered and a damper for supporting the tub 21 can be further installed on the lower side have.

A plurality of holes are formed in the drum 20 so that water can flow between the tub 21 and the drum 20. The drum 20 is rotated by the rotation of the drum 20, At least one lifter 22 is provided along the inner circumferential surface of the lifter.

The drum 20 may be arranged horizontally, and the rear portion of the drum 20 may be arranged to have a predetermined inclination lower than the horizontal. (Not shown) for providing driving force for rotating the drum 20 is provided.

A gasket (23) is provided between the cabinet (11) and the tub (21). One side of the gasket 23 is engaged with the cabinet 11 and the other side is joined along the periphery of the opened front portion of the tub 21. [ It is possible to prevent water stored in the tub 21 from leaking between the tub 21 and the cabinet 11. [

The gasket 23 is elastically folded in accordance with the vibration of the tub 21, thereby buffering the vibration. The gasket 23 may be made of a deformable flexible material having elasticity somewhat, and may be formed using natural rubber or synthetic resin.

3 is a flowchart showing a general method of controlling a washing machine according to an embodiment of the present invention.

A method of controlling a washing machine according to an embodiment of the present invention will be described with reference to FIG.

When the washing machine is turned on after the laundry is inserted into the drum 20 of the washing machine, the washing machine starts a washing cycle for the laundry according to a signal from a controller (not shown). (S1) When the washing cycle is started, the amount of the laundry in the drum 20 is detected. (S2)

Hereinafter, the method of detecting the extinction will be described in more detail. In the washing cycle, a rotating operation is performed to separate foreign substances from the laundry and to remove the washing water absorbed in the laundry. The motor torque, inertia torque, friction torque and load torque for the rotation of the drum 20 .

Here, the motor torque is a force applied to rotate the motor connected to the drum 20, and the inertia torque is a force which interferes with inertia to maintain the existing motion state (rotation) when accelerating or decelerating during rotation , The friction torque is a force which interferes with the rotation due to the friction between the drum 20 and the laundry, the door 16 and the laundry or the laundry, and the load torque is a force which interferes with the rotation of the drum 20 by the weight of the laundry .

Since the motor torque is a force necessary for operating the motor, the inertia torque, the friction torque, and the load torque are shown as a summed value. The motor torque can be calculated by multiplying the lift of the laundry by the radius of the tub 21.

The inertia torque can act as a force that interferes with the rotational motion through the inertia force depending on the distribution of the drum 20 and laundry when accelerating or decelerating during the rotation operation. At this time, the inertia torque may be proportional to the mass, the square of the radius of the drum 20.

Since the frictional torque is a frictional force acting between the laundry and the tub 21, the laundry and the door 16, it may be proportional to the rotating speed. The friction torque can be calculated by multiplying the friction coefficient by the rotation speed.

The load torque can be calculated from the weight of the laundry, the gravitational acceleration, and the radius of the drum 20, which is gravity acting in accordance with the distribution of the laundry during start-up.

Since the motor torque, the inertial torque, the friction torque, and the load torque act simultaneously during the rotation of the drum 20, and the component of such force is reflected in the current value of the motor, the control unit is measured through the current sensing unit It is possible to calculate the discharge amount using the current value.

After detecting the amount of laundry in the drum 20, the washing water is supplied to the set water level. (S3) At this time, the set water level can be adjusted according to the result of the detection of the volume. More specifically, the set water level can be set in proportion to the volume, and the volume set in the preset table or formula can be set by substituting.

The water supply can be made through a water supply valve. A water level sensor for determining a water level according to the water level may be provided. The control unit can turn on the water supply valve until the water level sensed by the water level sensor reaches the set water level. When the water supply valve is turned on, the wash water can be supplied into the drum 20. The water level of the wash water may gradually increase from the lower side of the drum 20 to the water level.

The control unit can turn off the water supply valve when the water level detected by the water level sensor reaches the set water level. If the set water level is set in proportion to the water level, the set water level may be lower when the water level is low, and the set water level may be higher when the water level is large.

If the set water level is determined according to the amount of water discharged, the initial water level can be set to the water level. In the case of an initial water supply, the initial water supply quantity can be set to the target pulse in accordance with the set water level.

Also, in the case of a bag having a high moisture content, the laundry can be re-watered to reach the set water level because the laundry water can be absorbed even when the water level rises and the water level rises.

In the case of a shell having a high moisture content even during the re-watering, water can be further absorbed, so that the re-watering can be carried out several times, not just once.

Since the moisture content differs depending on the porosity, the number of different re-feeds and the re-feed rate can be set for different types of porosity. Therefore, a relatively large number of re-watering can be performed in the case of a shell having a high moisture content, and a relatively small number of times of re-watering can be performed in a shell having a low moisture content.

As the water level reaches the set water level, the water level is measured. (S4) At this time, as a method of measuring the water supply amount, a flow meter 30 for sensing the water supply amount is provided. The flow meter 30 can be mounted to the inlet port to measure the flow rate of water flowing into the inlet port (not shown) of the washing machine.

The flow meter 30 can measure the flow rate through the number of pulses due to the rotation of the impeller (not shown) provided in the flow path through which the water flows, by the flow of water.

After the amount of water is measured in the washing cycle, the amount of the water depends on the water amount. (S5) In the case of a water-absorbing foam, water may be supplied more because the water is absorbed in the foam in the washing cycle. On the other hand, in the case of a foam that absorbs less water, the amount of water may be reduced because water is less absorbed in the bag in the washing cycle.

Therefore, in the case of paddles with high moisture content, more water is absorbed and absorbed. Therefore, the amount of water is increased, and as a result, in the case of the water having a large amount of water, the moisture content is high.

In the case of low moisture content, relatively low water content is absorbed, which means that the re-watering can not be avoided. Therefore, the amount of water is decreased, and in the case of water with a small amount of water, the moisture content is low.

After the porosity is judged, the washing cycle is terminated. (S6) After the washing cycle is completed, the rinsing cycle is performed (S7), and after the rinsing cycle, the spinning cycle is performed. (S8) The dewatering step can be set to suit each of the porosities according to porosity.

After the dewatering process is completed, the drying process is performed. (S9) In the drying step, the drying process corresponding to each of the porosities is carried out through the data obtained by judging the porosity through the water amount.

More specifically, when the water supply amount is small, it is judged that the moisture content is low, and a drying process corresponding to the porcelain having low moisture content can be performed. At this time, the drying step can be performed by saving the drying time and the drying energy compared to the case where the water supply amount is large in performing the drying step.

When the amount of water is large, it is judged that the moisture content is high, and the drying process can be performed according to the porcelain having a high moisture content. In this case, the drying step can be performed by further adding drying time and drying energy to the drying step, as compared with the case where the water amount is small.

Fig. 4 shows the classification of the fuels according to the specific amount of water and the drying schedule for the fuels separately.

4 is a flowchart illustrating a control method for determining a porosity according to an amount of water and performing a drying process according to a porosity according to an embodiment of the present invention.

Referring to FIG. 4, after the laundry is put into the drum 20 of the washing machine, the laundry is started to be washed according to a signal from the controller. (S10) Detects the amount of the cloth in the drum 20 during the washing cycle. (S11) After detecting the discharged amount, the washing water is supplied to the set water level. (S12) At this time, it can be judged through the water level sensor whether or not the water level has reached the predetermined water level. When the water level reaches the set water level, the water level is measured. (S13)

And the porosity can be classified according to the amount of water. The initial water supply amount is determined as a basic water supply amount, and the water supply amount may be changed through re-watering depending on the porosity. If the porridge can absorb a large amount of water, the number of re-watering can be increased, and if the porridge can absorb less moisture, the number of re-watering can be reduced. Therefore, the number of re-watering can be determined according to the porosity.

Therefore, when determining the porosity according to the water supply amount, the water supply amount may be a value obtained by adding the water re-supply amount to the initial water supply amount according to the number of re-supply.

In step S14, it is determined whether the water supply amount is larger than the first water supply amount or not. If the water supply amount is larger than the first water supply amount, it is determined whether the water supply amount is larger or smaller than the second water supply amount. (S15) Through the above-described two steps, it is possible to distinguish three types of porosity according to the amount of water.

If the measured washing water supply amount is smaller than the first water supply amount, the porosity at this time is judged as the first water quality. (S26) When it is judged as the first formation, the washing cycle is finished (S27), and when the rinsing cycle and the dewatering cycle are completed (S28, S29), a predetermined first drying cycle is performed. (S30) The compressor frequency, the control temperature for drying, and the drying operation time, which are performed in the first drying cycle, are preset and stored.

If the measured washing water supply amount is larger than the first water supply amount but smaller than the second water supply amount, the porosity at this time is judged as the second water quality. (S21), the washing cycle is ended (S22), and when the rinsing cycle and the dewatering cycle are completed (S23, S24), the second drying cycle is performed. (S25) The compressor frequency, the control temperature, the drying operation time, etc. performed in the second drying cycle are preset and stored.

If the measured amount of washing water is larger than the second water supply amount, the porosity at this time is judged as the third water quality. (S16) If it is determined that the third condition is satisfied, the washing cycle is finished (S17), and the rinsing cycle and the dewatering cycle are completed (S18, S19). (S20) The compressor frequency, the control temperature, the drying operation time, etc. performed in the third drying cycle are preset and stored.

The larger the water supply amount, the larger the amount of moisture absorbed in the porcelain so that the drying operation time may take a long time.

In the case of the drying operation time, since the amount of moisture absorbed by the second porcelain is larger than the amount of moisture absorbed by the first porcelain, The drying time of the drying cycle is longer.

In addition, since the amount of water absorbed by the third porosity is larger than the amount of moisture absorbed by the second porosity, the drying operation of the third drying cycle according to the third porosity Time is longer.

For each drying stroke, different control temperatures can be set during the drying stroke. The higher the control temperature, the more evaporation of water occurs depending on the temperature, so that the higher the temperature, the better the drying performance. However, if the temperature rises above a certain range, the foam may be damaged, so that the control temperature can be increased to such an extent that the foam is not damaged and the drying performance can be improved.

In addition, different compressor frequencies can be set during the drying cycle for each drying stroke method. Since the compressor compresses the air to raise the temperature, when the compressor frequency is high, the temperature can be increased to improve the drying performance. Therefore, the drying performance can be improved according to the compressor frequency.

FIG. 5 is a table showing the relationship between the moisture content (absorption regain) and the heat of wetting according to the material.

The moisture content is the moisture regain in English and has the same meaning as the absorption regain. The absorption fraction is the integral heat of absorption in English and is equivalent to heating of wetting.

In the case of sorption fission, the unit is J / g, which means the heat of absorption per unit weight of the dry sample. Therefore, if the value of the absorption fraction is zero, it means that the water does not absorb at all. If the absorption fraction is large, it means that it absorbs relatively water.

In the case of the wool having a high absorption coefficient, the absorption fraction of the wool is 113 and the water content of the wool is also in the range of 14 to 18. In case of polyester with low absorption fraction, it is found that the absorption fraction is 5 and the water content is also small 0.4. As can be seen from the comparison of other materials, it can be seen that the absorption and fracture ties have a similar tendency.

The distinction between large absorptive fragmentation and small absorptive fragmentation can be related to the determination of porosity by water supply.

If the sorption fragmentation is small, it can be considered that the bag is made of a material that does not absorb much water, and as a result, the water amount corresponding to the set water level during washing may be relatively small. Therefore, it can be considered that there is a porosity corresponding to a small amount of water, so that the drying process can be performed by determining the porosity according to the water supply amount.

If the absorption split is large, it can be said that the bag is made of a material capable of absorbing a lot of water, and as a result, the water amount corresponding to the set water level may be relatively large. Therefore, it can be considered that there is a porosity corresponding to a large amount of water, so that the drying process can be performed by determining the porosity according to the water supply amount.

It is also known from the relationship between moisture content and wet heat that a material having a high moisture content has a high wet heat. The higher the wet heat, the more drying time is required under the same conditions.

Therefore, in the case of a small bubble, the water supply amount is low, the water content is low, and the wet heat is low, so that the drying operation time does not take much time. In the case of a bubble having a large absorption capacity, it takes a lot of drying operation time because the amount of water is high, the water content is high, and the wet heat is high. This indicates that the drying operation time can be determined depending on the porosity as a result.

FIG. 6 is a table summarizing the water amount according to the JEMA standard according to the experiment and the water amount according to the different materials according to the re-watering.

Referring to FIG. 6, an experiment was conducted to determine the amount of water supplied according to the set water level, based on the condition of the laundry according to the JEMA standards of the Japan Electrical Manufacturers' Association Respectively.

According to the JEMA standard, when the 'Wash + Dry' course, which is a JEMA standard course and a product to which the present invention is applied, is selected, the performance can be evaluated based on a case where the JEMA standard load 6 kg is detected and the washing stroke is performed for a predetermined time.

The standard of the bamboo corresponding to the JEMA standard is judged based on the bamboo having a ratio of cotton to poly of 53:47. According to the actual use configuration, the bubble is judged based on the case where cotton is less than 50%. In case of towel, 100% cotton is judged based on the case.

Once the water level has been set, the washing water should be supplied. In the case of the set water level, it can be judged through the water level sensor. At this time, since there is a probability of error in the water level sensor, it is possible to determine the maximum value and the minimum value of the water level sensed by the water level sensor, and to measure the initial water supply amount and the refeed water amount according to the determination.

It is possible to set the standard water supply amount for 6kg of standard load. In the experiment, the experiment was performed by setting the target pulse amount to 2640 as the reference water supply amount. The experimental conditions except the porosity were controlled by watering based on the actual composition, JEMA standard, and towel of 6 kg.

The initial water supply quantity can be watered to the target pulse. There may be some errors in fitting the initial water supply to the target pulse.

As the initial feed progresses, there may be a difference in the moisture content depending on the porosity. To reiterate, the cannon is able to absorb the water that has been fed, and the amount of moisture absorbed by each can be different because the moisture content varies with the porosity. Therefore, it is difficult to adjust the set water level to the initial amount of water because the cannon absorbs the initial amount of water. Therefore, the set water level must be adjusted through re-watering as long as the pot contains water.

As a result, if the porosity is different, the moisture content is different, and accordingly, to meet the set water level, the water needs to be replenished as much as the water contained in the bag, and the porosity can be judged based on the amount and frequency of re-

In the case of re-watering, since the water is continuously absorbed during the initial watering, the water absorption of the water can be continuously continued even after one re-watering. Therefore, it is possible to maximize the traps by repeated re-feeding, and at the same time, the set water level according to the water supply can be adjusted to determine the water supply amount.

According to the experimental results, in the case of practical construction, the cotton material which can absorb moisture is less than 50%, so the relative humidity is relatively low.

Therefore, according to the results of the experiment, the refueling has been stopped twice. As a result, the amount of water combined with the initial water supply amount and the refilled water amount is judged as the water supply amount, so that the pulse value of the experimental result has a value of about 3274.

Cotton and poly have a ratio of 53 to 47 in the case of bamboo which conforms to the JEMA standard. Therefore, it may absorb more moisture than the bolls in the previous yarn configuration and may have a higher moisture content.

Therefore, the re-supply of water was carried out four times. As a result, the amount of water combined with the initial water supply amount and the refilled water amount is judged as the water supply amount, so that the pulse value was recorded as about 4291 in the experimental result.

In the case of towels, it is composed of only cotton material which absorbs moisture well, so there is a relatively high moisture content.

Therefore, the water was absorbed and contained well, and the refeeding was also carried out six times. As a result, the amount of water combined with the initial water supply amount and the refilled water amount is judged as the water supply amount, so that the pulse value is recorded as about 5762 in the test result.

Based on the experimental results, it can be seen that the value of the first water supply amount is within the error range between the water supply amount of 3274 pulses for the actual use composition type and the water supply amount of 4291 for the JEMA standard type .

The value that the second water supply can have is the value within the error range between 4291 pulses for JEMA standard gun water and 5762 water for towel gun.

It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims, , Equivalents, and alternatives.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

10: Casing 11: Cabinet
12: front cover 13: top cover
14: detergent box 15: detergent box housing
16: Door 17: Glass
20: drum 21: tub
22: lifter 23: gasket
30: Flowmeter

Claims (10)

Casing;
A tub disposed in the casing;
A drum rotatably installed in the tub and receiving laundry; A method of controlling a washing machine,
Starting a washing cycle;
Sensing a quantity of the drum in the drum;
Performing water supply to the set water level according to the amount of the laundry sensed in the drum;
Measuring the water supply amount of the washing water;
Determining a porosity by dividing into a first porosity when the measured water supply amount is less than the first water supply amount, a second porosity when the first water supply amount is less than the second water supply amount, and a third porosity when the water supply amount is more than the second water supply amount;
The washing cycle is terminated, and a rinsing and dewatering cycle is performed;
Wherein the first drying step is performed when the determined porosity is the first porosity, the second drying is performed when the porosity is the second porosity, and the third drying is performed when the porosity is the third porosity.
The method according to claim 1,
Wherein the measured water supply amount is measured using a flow meter provided in the washing machine.
The method according to claim 1,
Wherein the water supply is performed after the initial water supply in order to supply water to the set water level.
The method of claim 3,
Wherein the number of water supply times of the refill water is determined according to the porosity.
The method of claim 3,
Wherein the water supply amount is a sum of the initial water supply amount and the refilled water supply amount.
The method according to claim 1,
Wherein the set water level is determined through a water level sensor.
The method according to claim 1,
And the compressor frequency of the first drying step, the second drying step and the third drying step are different from each other.
The method according to claim 1,
Wherein the control temperature of the first drying step, the second drying step, and the third drying step are different from each other.
The method according to claim 1,
Wherein the drying operation times of the first drying step, the second drying step and the third drying step are different from each other.
10. The method of claim 9,
The drying operation time of the third drying cycle may be longer than the drying operation time of the second drying cycle and the drying operation time of the first drying cycle is longer than the drying operation time of the second drying cycle .

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