KR102401555B1 - Method for controlling washing machine - Google Patents

Abstract

A method for controlling a washing machine according to the present invention comprises the steps of: measuring an amount of water supplied to washing; Determining the fabric by dividing it into a first fabric when the measured water supply amount is less than the first water supply amount, a second fabric when the first water supply amount or more and less than a second water supply amount, and a third fabric when the measured water supply amount is more than the second water supply amount; An invention comprising the step of performing a first drying cycle when the determined cloth is the first cloth, a second drying cycle when the cloth is the second cloth, and a third drying cycle when the cloth is a third cloth. Depending on the fabric, there is an effect that can save drying time and drying energy.

Description

How to control washing machine {METHOD FOR CONTROLLING WASHING MACHINE}

The present invention relates to a method for controlling a washing machine.

In general, a washing machine is a device for processing laundry through various actions such as washing, dehydration and/or drying. The washing machine includes a tub containing water and a drum rotatably provided in the tub, and a plurality of through holes through which water passes are formed in the drum.

In the washing machine, when a user selects a desired course using a control panel in a state in which laundry such as clothes or bedding is put in the drum, a preset algorithm is executed in response to the selected course, thereby supplying/discharging, washing, rinsing, and spin-drying etc. are carried out.

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

In the washing cycle, detergent is supplied along with water into the drum, and the contamination on the fabric is removed using the chemical action of the detergent and the physical action by the rotation of the pulsator and/or the drum.

In the rinsing cycle, clean water in which detergent is not dissolved is supplied into the drum to rinse the fabric. In particular, the detergent absorbed in the fabric is removed during the washing cycle. During the rinsing cycle, a fabric softener is sometimes supplied along with water.

In the dewatering cycle, after the rinsing cycle is completed, the drum is rotated at high speed to dehydrate the fabric. In general, as the dehydration cycle is completed, all operations of the washing machine are terminated.

The washing operation of the washing machine is set according to the amount of laundry put into the drum. For example, the water supply level, washing intensity, drainage time, spin-drying time, etc. are set according to the amount of laundry.

However, the washing performance varies not only depending on the amount of laundry but also the quality of the fabric, and there is a problem in that sufficient washing performance cannot be expected when only the amount of laundry is considered in setting the washing operation.

For example, in the case of a water-repellent functional material with a low moisture content (ratio containing water in the fabric), sufficient washing is possible even with a large amount of cloth or with a small amount of water. In the case of this high cloth, more water is required even if the weight is perceived as low. Therefore, it is necessary to determine the fabric according to the moisture content and configure the washing operation settings in an appropriate manner according to the fabric.

In addition, in the case of washing-drying washing machines, unlike dryers, in most cases there is no sensor dedicated to determining the degree of drying that can detect and determine the degree of drying separately. Quite often it is

For example, in the case of a conventional washing-drying washing machine, the initial drying time is determined only by the weight of the fabric after spin-drying. However, this method has a limitation in reflecting the fabric characteristics in drying, and unnecessary drying time and energy may be input for fabrics that dry well.

A first object of the present invention is to provide a method for controlling a washing machine capable of easily determining the cloth quality while sensing the amount of laundry in the washing step.

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

A control method of a laundry treatment apparatus according to the present invention for solving the above problems, the casing; a tub disposed in the casing; a drum rotatably provided in the tub and accommodating laundry; In the laundry treatment apparatus comprising a,

detecting the amount of laundry in the drum;

supplying wash water up to a set water level in the drum;

measuring the water supply;

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

a step of completing the washing cycle and performing rinsing and dehydration operations;

and performing a first drying cycle if the determined cloth is the first cloth, a second drying cycle if the second cloth, and a third drying cycle if the cloth is the third cloth.

The amount of water supplied can be measured using a flow meter provided in the washing machine, and in order to supply water up to a set water level, re-watering 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 performed in the first drying cycle, the second drying cycle, and the third drying cycle may be different.

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 may be longer than the drying operation time of the second drying cycle.

According to the control method of the washing machine of the present invention, there are one or more of the following effects.

First, when washing water is supplied to the washing tub to a certain level after detecting the amount of laundry in the washing step, the amount of water supplied is measured to provide the effect of simply and easily classifying cloths according to the amount of water supplied.

Second, it provides the effect of determining the amount of water supplied by using a flow meter in the product without changing the equipment and judging the quality of the fabric according to the amount of water supplied.

Third, by varying the drying time according to the measured fabric, it provides the effect of reducing unnecessary drying energy and drying time.

1 is a perspective view showing an exterior of a washing machine;
2 is a perspective view showing the exterior of the washing machine body including the flow meter.
3 is a flowchart illustrating 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 specifically determining fabric according to the amount of water supplied and performing a drying cycle according to the fabric according to an embodiment of the present invention.
5 is a table showing the relationship between absorption regain and heat of wetting according to materials
6 is a table in which the amount of water supplied according to the re-watering in the case of fabric corresponding to the JEMA standard through the experiment is compared with the amount of water supplied according to other materials.

It should be understood that the embodiments described below are illustratively shown to help understanding of the invention, and that the present invention may be implemented with various modifications different from the embodiments described herein.

However, in the description of the present invention, if it is determined that a detailed description of a related known function or component may unnecessarily obscure the gist of the present invention, the detailed description and detailed illustration thereof will be omitted. In addition, the accompanying drawings are not drawn to scale in order to help understanding of the invention, but dimensions of some components may be exaggerated.

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

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

In the present application, terms such as "comprises", "consists of" or "consisting of" are intended to designate that a feature, number, step, action, component, part, or combination thereof described in the specification is present, one or It should be understood that this does not preclude the possibility of addition or existence of further other features or numbers, steps, operations, components, parts, or combinations thereof.

1 is a perspective view showing an exterior of a washing machine;

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

Looking at the inside and outside of the washing machine schematically with reference to FIGS. 1 and 2 , first, the washing machine is rotatably provided in the casing 10 forming the exterior, the tub 21 installed in the casing 10, and the tub 21, and a drum 20 for receiving laundry.

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

The casing 10 forms the exterior of the washing machine and includes a cabinet 11 with an open front and an upper surface, a base for supporting the cabinet 11, and a laundry entry/exit hole formed so that laundry can enter and exit the cabinet 11 It includes a front cover 12 coupled to the front of the and a top cover 13 provided on the upper side of the cabinet 11 . A door 16 for opening and closing the laundry entrance and exit hole is rotatably provided on the front cover 12 .

Glass 17 may be provided on the door 16 so that the laundry inside the drum 20 can be seen. The glass 17 may have a convex shape, and the tip of the glass 17 may protrude to the inside of the drum 20 when the door 16 is closed.

The detergent box accommodates additives such as preliminary or main laundry detergent, fabric softener, and bleach, and may be detachably provided in the casing 10 .

In order to buffer the vibration generated when the drum 20 rotates, the tub 21 is installed in a state suspended from the top cover 13 by a spring, and a damper supporting the tub 21 may be further installed at the lower side. there is.

A plurality of holes are formed in the drum 20 to allow water to flow between the tub 21 and the drum 20, and the drum 20 so that laundry can be lifted and dropped according to the rotation of the drum 20. One or more lifters 22 are provided along the inner circumferential surface of

The drum 20 may be arranged horizontally, or the rear portion of the drum 20 may be arranged so as to have a predetermined inclination downward than the horizontal. A motor (not shown) providing a 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 coupled to the cabinet 11 , and the other side is coupled along the periphery of the open front part of the tub 21 . Accordingly, it is possible to prevent water stored in the tub 21 from leaking between the tub 21 and the cabinet 11 .

In addition, the gasket 23 is elastically folded according to the vibration of the tub 21 , thereby buffering the vibration. The gasket 23 may be made of a deformable flexible material having some elasticity, and may be formed using natural rubber or synthetic resin.

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

Hereinafter, a control method of a washing machine according to an embodiment of the present invention will be described with reference to FIG. 3 .

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

Hereinafter, the laundry amount detection method will be described in more detail. In the washing cycle, a rotation operation is implemented to separate foreign substances from the laundry and remove the washing water absorbed by the laundry, and the motor torque, inertia torque, friction torque, and load torque for the rotation of the drum 20 are applied. will do

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

The washing machine can determine the amount of laundry during the rotating operation of the drum 20. First, since the motor torque is a force required for the motor operation, the inertia torque, the friction torque, and the load torque appear as the summed value. The motor torque may be calculated as a value obtained by multiplying the force to lift the laundry by the radius of the tub 21 .

When the inertial torque is accelerated or decelerated during the rotational operation, the inertia force according to the distribution of the drum 20 and the laundry may act as a force that prevents the rotational operation. In this case, the inertia torque may be proportional to the square of the mass and the radius of the drum 20 .

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

The load torque is the gravity acting according to the distribution of laundry during startup, and can be calculated from the weight of the laundry, the gravitational acceleration, and the radius of the drum 20 .

As such, while the drum 20 is rotating, the motor torque, the inertia torque, the friction torque, and the load torque act simultaneously, and since the components of these forces are reflected in the current value of the motor, the control unit is measured through the current sensing unit during motor operation. The amount of laundry can be calculated using the current value.

After detecting the amount of laundry in the drum 20, washing water is supplied up to the set water level. (S3) At this time, the set water level can be adjusted according to the result of the laundry weight detection. In more detail, the set water level may be set in proportion to the laundry amount, or may be set by substituting the laundry amount in a preset table or formula.

Water may be supplied through a water supply valve. Since it is necessary to set the water level according to the water supply, a water level sensor for determining the water level according to the water level may be provided. The control unit may turn on the water supply valve until the water level detected by the water level sensor reaches a set level. When the water supply valve is turned on, washing water may be supplied into the drum 20 . The supplied wash water may be filled up from the lower side of the drum 20 to gradually increase the water level.

When the water level detected by the water level sensor reaches a set level, the control unit may turn off the water supply valve. When the set water level is set in proportion to the laundry amount, the set water level may be lower when the laundry amount is small, and the set water level may be higher when the laundry amount is large.

When the set water level according to the laundry amount is determined, the initial water supply may be performed according to the water level. In the case of initial water supply, the initial water supply quantity may be determined as a target pulse according to a set water level.

In addition, in the case of a fabric having a high moisture content, washing water is supplied and the fabric can absorb the wash water even while the water level rises, so that re-watering to reach the set water level again can be performed.

Even during re-watering, the fabric with a high moisture content can absorb more moisture, so re-watering can be performed several times, not just once.

Since the amount of moisture is different depending on the fabric, different number of re-watering times and re-watering amount may be set for fabrics of different fabrics. Therefore, in the case of a fabric with a high moisture content, a relatively large number of re-watering can be performed, and in the case of a fabric with a low moisture content, a relatively small number of re-watering can be performed.

As water is supplied up to the set water level, measure the amount of water supplied accordingly. (S4) At this time, as a method of measuring the amount of water supplied, a flow meter 30 for detecting the amount of water supplied is provided. The flow meter 30 may be mounted on the inlet port to measure the flow rate of water flowing into the inlet port (not shown) of the washing machine.

In the flowmeter 30 , an impeller (not shown) provided in a flow path through which water flows is rotated by the flow of water, and the flow rate can be measured through the number of pulses according to the rotation.

After the amount of water supplied is measured in the washing cycle, the fabric quality is determined according to the amount of water supplied. (S5) In the case of a cloth that absorbs a lot of water, the amount of water supplied may be higher because a lot of water is absorbed by the cloth during the washing cycle. Conversely, in the case of a fabric that absorbs less moisture, the amount of water supplied may be reduced because less moisture is absorbed by the fabric during the washing cycle.

Therefore, in the case of a fabric with a high moisture content, it absorbs more moisture and contains more moisture, so there is no choice but to re-water it a lot. Therefore, the amount of water supplied increases, and as a result, it can be seen that the fabric with a large amount of water is a fabric with a high moisture content.

In the case of a fabric with a low moisture content, it absorbs and retains relatively little moisture, so it is inevitable to reduce the amount of re-watering. Therefore, it can be seen that the amount of water supplied is reduced, and in the case of a fabric with a small amount of water supplied, it can be seen that the fabric has a low moisture content.

After the cloth quality is judged, the washing cycle is finished. (S6) After the washing cycle is finished, a rinsing cycle is performed (S7), and a spin-drying cycle is performed after the rinsing cycle. (S8) The dehydration cycle can be set to suit each fabric depending on the fabric.

After the dehydration cycle is completed, the drying cycle is performed. (S9) In the drying cycle, a drying cycle suitable for each fabric is performed through the classified data by determining the fabric through the amount of water supplied.

More specifically, when the amount of water supplied is small, it is determined that the fabric has a low moisture content, and a drying process can be performed to suit the fabric of the fabric having a low moisture content. In this case, in performing the drying cycle, the drying cycle can be performed by saving drying time and drying energy compared to the case where the amount of water supplied is large.

When the amount of water supplied is large, it is judged that the fabric has a high moisture content, and a drying cycle can be performed according to the fabric quality of the fabric with a high moisture content. In this case, in performing the drying cycle, the drying cycle can be performed by inputting more drying time and drying energy than when the amount of water supplied is small.

The classification of cloth according to the specific water supply amount and the drying process for each divided cloth will be described with reference to FIG. 4 .

4 is a flowchart illustrating a control method for specifically determining fabric according to the amount of water supplied and performing a drying cycle according to the fabric according to an embodiment of the present invention.

Referring to FIG. 4 , first, after the laundry is put into the drum 20 of the washing machine, the washing process for the laundry is started according to a signal from the control unit. (S10) The amount of fabric in the drum 20 is sensed while the washing cycle is in progress. (S11) After detecting the amount of laundry, washing water is supplied up to the set water level. (S12) At this time, it can be determined through the water level sensor whether water is supplied by the set water level. If water is supplied as much as the set water level, measure the amount of water supplied accordingly. (S13)

And it can be classified according to the amount of water supply. The initial water supply quantity is determined as the basic water supply quantity, and the water supply quantity may vary through re-watering according to the quality of the fabric. When the cloth can absorb a lot of water, the number of re-watering may be increased, and if the cloth can absorb little water, the number of re-watering may be reduced. Therefore, the number of re-watering can be determined according to the fabric.

Therefore, when determining the quality according to the water supply amount, the water supply amount may be the initial water supply amount plus the water supply amount re-watered according to the number of re-watering times.

In the determination of the water supply amount, first, it is determined whether the water supply amount is greater than the first water supply amount or not (S14), and when the water supply amount is greater than the first water supply amount, it is determined whether the water supply amount is greater than the second water supply amount. (S15) Through the determination of the two steps, it is possible to classify the cloth according to the amount of water supply into three categories.

If the measured washing water supply amount is less than the first water supply amount, the cloth quality at this time is determined as the first cloth quality. (S26) If it is determined that it is the first cloth, the washing cycle is finished (S27), and when the rinsing cycle and the spin-drying cycle are finished (S28, S29), a first predetermined drying cycle is performed. (S30) The compressor frequency performed in the first drying cycle, the control temperature for drying, and the drying operation time are preset and stored.

If the measured washing water supply amount is greater than the first water supply amount but less than the second water supply amount, the cloth quality at this time is determined as the second cloth material quality. (S21) If it is determined as the second cloth, the washing cycle is finished (S22), and when the rinsing cycle and the dehydration cycle are also finished (S23, S24), the second drying cycle is performed. (S25) The compressor frequency, control temperature, and drying operation time performed in the second drying cycle are preset and stored.

If the measured washing water supply amount is greater than the second water supply amount, the cloth at this time is determined as the third cloth. (S16) If it is determined as the third cloth, the washing cycle is finished (S17) and the rinsing cycle and the dehydration cycle are finished (S18, S19), then the third drying cycle is performed. (S20) The compressor frequency, control temperature, and drying operation time performed in the third drying cycle are preset and stored.

The greater the amount of water supplied, the greater the amount of moisture absorbed by the fabric, so it may take a lot of drying time.

In the case of the drying operation time, since the amount of moisture absorbed by the second cloth is greater than the amount of moisture absorbed by the first cloth, the second cloth according to the second cloth is higher than the drying operation time of the first drying cycle according to the first cloth. The drying operation time of the drying stroke is longer.

In addition, since the amount of moisture absorbed by the third fabric is greater than the amount of moisture absorbed by the second fabric, the drying operation of the third drying cycle according to the third fabric is higher than the drying operation time of the second drying cycle according to the second fabric. time is longer

In addition, it is possible to set a different control temperature during the drying cycle for each drying cycle method. When the control temperature is high, the evaporation of moisture according to the temperature occurs a lot, so that the drying performance can be improved as the temperature increases. However, since damage to the fabric may occur when the temperature rises beyond a specific range, the control temperature may be increased to the extent that the drying performance can be improved without damage to the fabric.

In addition, different compressor frequencies can be set during the drying cycle for each drying cycle method. Since the compressor serves to increase the temperature by compressing the air, when the compressor frequency is high, the drying performance can be improved by increasing the temperature by that much. Therefore, it is possible to improve the drying performance according to the compressor frequency.

5 is a table showing the relationship between absorption regain and heat of wetting according to materials.

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

In the case of absorption integration, the unit is J/g, which means heat of absorption per unit weight of a dry sample. Therefore, if the absorption integrative value is 0, it means that no water is absorbed, and if the absorption integration value is large, it can be interpreted to mean that a relatively large amount of water is absorbed.

Comparing the moisture content and absorption integral values for each material in the table, wool with a large absorption integral ratio has an absorption integration value of 113, and the moisture content at this time also has a value of 14 to 18. In addition, it can be seen that, in the case of polyester having a small absorption integral, the absorption integration value is 5, and similarly, the moisture content also has a small value of 0.4. Compared with other materials as well, it can be seen that absorption integration and water heat have a similar tendency.

The distinction between a case in which the absorption integral is large and a case in which the absorption integral is small may be related to the determination of porosity according to the amount of water supplied.

If the absorption integral is small, it can be considered that the cloth is made of a material that does not absorb much water, and as a result, the amount of water supplied corresponding to the set water level during washing may be relatively small. Therefore, since it can be considered that the fabric has a small amount of water supply, the drying process can be performed by determining the fabric quality according to the water supply amount.

If the absorption integration is large, it can be seen that the cloth is made of a material that can absorb a lot of water, and as a result, the amount of water supplied corresponding to the set water level during washing may be relatively large. Therefore, since it can be considered that there is a fabric corresponding to a large amount of water supply, the drying process can be performed by judging the fabric according to the water supply amount.

Also, as a known fact, looking at the relationship between moisture content and heat of wetting, it can be seen that a material with a high moisture content also has a high heat of wetting. And it can be seen that the high wet heat requires a lot of drying time under the same conditions.

Therefore, in the case of a fabric having a small absorption integral heat, the amount of water supplied is small, the moisture content is low, and the wet heat is also low, so the drying operation time is not long. In the case of a fabric having a large absorption integral heat, the amount of water supplied is large, the moisture content is high, and the drying operation time is long because the wet heat is also high. As a result, it indicates that the drying operation time can be determined depending on the fabric.

6 is a table in which the amount of water supplied according to re-watering is compared with the amount of water supplied according to other materials in the case of fabric corresponding to the JEMA standard through the experiment.

Referring to FIG. 6 , based on the case of fabric according to the washing machine performance evaluation standard prescribed by JEMA of the Japan Electrical Manufacturers Association, an experiment to determine the amount of water supplied according to the set water level was performed for fabrics made of only actual used fabric and towels. did.

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 JEMA standard load of 6 kg is sensed and the washing cycle is performed for a predetermined time.

The standard of fabric corresponding to the JEMA standard is judged on the basis of fabric with a ratio of cotton and poly of 53:47. The fabric according to the actual use configuration is judged on the basis of the case where the cotton content is 50% or less. Towels are judged on the basis of 100% cotton.

Once the water level is set, the washing water must be supplied. In the case of a set water level, it can be determined through a water level sensor. At this time, since there is a possibility that the water level sensor has an error, it is possible to determine the highest and lowest values of the water level detected by the water level sensor, and measure the initial water supply quantity and the re-water supply quantity accordingly.

It is possible to set the water supply amount as a standard for the standard load of 6 kg. In the above experiment, the experiment was carried out by setting the target pulse, which is the standard water supply amount, to 2640. The actual use composition, JEMA standard, and towels were all supplied with water based on 6Kg, and other experimental conditions other than cloth were controlled.

The initial water supply quantity may be supplied according to the target pulse. A slight error may occur in the process of adjusting the initial water supply quantity to the target pulse.

As the initial watering progresses, there may be a difference in moisture content depending on the fabric at the same time. In other words, the fabric can absorb the water supplied, and since the moisture content is different according to the fabric, the moisture absorption amount is different for each fabric. Therefore, since the fabric absorbs a certain amount of initially watered water, it may be difficult to match the set water level with the initial watering amount. Therefore, the set water level should be adjusted by re-watering as much as the cloth contains moisture.

As a result, different fabrics have different moisture content, and accordingly, to match the set water level, re-watering as much as the moisture contained in the fabric is required.

In the case of re-watering, the fabric absorbs moisture continuously during the initial watering process, so even after one re-watering, the fabric can continuously absorb moisture. Therefore, the amount of water supplied is determined by allowing the cloth to contain the maximum moisture through several times of re-watering, and at the same time to match the set water level according to the water supply.

According to the experimental results, in the case of actual composition, cotton material, which can absorb moisture well, accounts for less than 50%, so the moisture content must be relatively low.

Therefore, according to the experimental results, re-watering is limited to two times. As a result, the sum of the initial water supply amount and the re-water supply amount is judged as the water supply amount, so the pulse value has a value of about 3274 as a result of the experiment.

In the case of fabric that meets JEMA standards, cotton and poly have a ratio of 53 to 47. Therefore, it can absorb moisture better than the fabric in the previous composition for actual use and may have a high moisture content.

Accordingly, re-watering was performed four times. As a result, the sum of the initial water supply amount and the re-water supply amount is judged as the water supply amount, so the pulse value was recorded as about 4291 as a result of the experiment.

In the case of towels, since they are made of only cotton, which can absorb moisture well, it has to have a relatively high moisture content.

Therefore, since it absorbs and contains moisture well, re-watering was performed six times accordingly. As a result, the sum of the initial water supply amount and the re-water supply amount is judged as the water supply amount, so the pulse value was recorded as about 5762 as a result of the experiment.

When the configuration of the present invention is applied based on the experimental results, the value that the first water supply can have is a value within the error range between 3274 pulse, which is the water supply for the actual fabric, and 4291, which is the water supply for the JEMA standard fabric. can be

The value that the second water supply amount can have may be a value within the error range between 4291 pulse, which is the water supply amount in the case of JEMA standard fabric, and 5762, which is the water supply amount in the case of towel cloth.

The accompanying drawings are only for easy understanding of the embodiments described in this specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and technology of the present invention , it should be understood as including equivalents or substitutes.

In addition, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the claims In addition, various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or outlook 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: flow meter

Claims (10)

casing;
a tub disposed in the casing and configured to store wash water;
a drum configured to receive laundry, disposed in the tub and having a plurality of holes formed therein so that wash water in the tub can flow into the drum;
a motor rotating the drum;
a water supply valve for controlling water supply to the tub;
a water level sensor configured to detect a level of wash water in the tub;
a flow meter sensing the amount of water supplied to the tub; And
A control unit for controlling a washing operation by controlling the motor and the water supply valve,
The washing cycle is:
detecting the amount of laundry in the drum;
an initial water supply step of supplying a predetermined target amount of water according to a set water level, wherein the set water level is set according to the amount of laundry detected in the drum;
re-watering at least once so that the water level sensed by the water level sensor reaches the set water level; And
If the amount of water supplied by adding the amount supplied in the initial water supply step and the re-watering step is less than the first water supply amount, the first bag is divided into the second bag, if the first water supply amount is less than the second water supply amount, and if it is more than the second water supply amount, it is divided into the third bag. determining the foreskin,
a step of completing the washing cycle and performing rinsing and dehydration operations; And
A washing machine comprising a step of performing a first drying cycle when the determined cloth is the first cloth, a second drying cycle when the second cloth, and a third drying cycle when the cloth is the third cloth.
delete delete According to claim 1,
The number of times of water supply of the re-watering is determined according to the cloth.
delete delete According to claim 1,
A washing machine having different compressor frequencies in the first drying cycle, the second drying cycle, and the third drying cycle.
According to claim 1,
A washing machine having different control temperatures in the first drying cycle, the second drying cycle, and the third drying cycle.
According to claim 1,
A washing machine having different drying operation times in the first drying cycle, the second drying cycle, and the third drying cycle.
10. The method of claim 9,
A washing machine in which the drying operation time of the third drying cycle is 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.

Images