KR20120005997A - Washing machine and method to control laundry thereof - Google Patents

Abstract

PURPOSE: A laundry machine and laundry control method thereof are provided to reduce water usage rates using washing bubbles. CONSTITUTION: When a laundry course is selected to a bubble washing course, a control unit senses the weight of the laundry(S200, S400). The control unit establishes the RPM(Round Per Minute) of a motor, a driving rate, a washing time, and a water re-supply number(S500). The control unit performs a washing process during the established laundry time using washing bubbles(S600). The control unit performs the established washing and drying process(S700).

Description

Washing machine and method to control laundry

The present invention relates to a washing machine for washing using foam and a washing control method thereof, and more particularly, to a washing machine and a washing control method for controlling effective washing by foam according to the washing machine load and the type of laundry.

In general, a washing machine (usually a drum washing machine) includes a drum-type water tank containing wash water and a rotating drum rotatably installed inside the water tank to rotate laundry into which laundry is inserted. The device is to be washed by the force to drop the laundry to the upper side and falling.

When the user selects the washing course, the washing machine senses the weight (load) of the laundry to determine the washing quantity, and injects detergent together with the amount of water to sufficiently wet the laundry in the tank according to the determined washing quantity, and then heats it. In the case of washing, the water and detergent injected are heated by a heater located at the bottom of the washing machine. The washing process is performed by the force of dropping the detergent water (water + detergent) whose temperature is increased by rotating the rotating drum and dropping the laundry.

However, these washing machines need to fill the space between the water tank and the rotating drum for washing, so a large amount of water is used, and thus a large amount of energy is required to raise the temperature of the water. There was a problem that a large amount of detergent is used for a large amount of consumption and high concentration of laundry.

In addition, there is a problem that the damage to the cloth is large in the case of laundry that requires delicate washing, such as wool or silk fabrics by the friction of water and friction between the laundry and the rotation of the rotating drum.

Therefore, the present invention is to solve the conventional problems as described above, the object of the present invention is to reduce the amount of water used by washing with foam and washing machine and washing control method thereof that can increase the cleaning power by high concentration detergent of the foam surface To provide.

Another object of the present invention is to provide a washing machine and a method for controlling the washing, by soaking laundry before foaming so that foam easily penetrates the laundry, thereby obtaining an optimal washing effect using foam.

Still another object of the present invention is to control the amount of water (wet water without detergent) to wet the laundry with detergent-free water according to the type of washing machine load, and to obtain an amount of water suitable for obtaining an optimum wetting effect. To provide a washing machine and a laundry control method thereof can be supplied.

Still another object of the present invention is to perform a wetting control to wet the laundry according to the type of laundry, washing machine and washing control that can reduce the damage to the cloth, washing time in the case of a small amount of delicate washing unnecessary wet control To provide a method.

In order to achieve the above object, the present invention provides a washing control method of a washing machine having a water tank and a rotating drum rotatably installed in the water tank, the laundry is put into a rotating drum, and the detergent is injected into the water tank. Supplying no detergent-free water; Supplying detergent-free water to the tank, and supplying detergent water including detergent into the tank; Supplying air to the detergent water using an air supply device installed at the bottom of the water tank to generate bubbles, and introducing the generated bubbles into the rotating drum through holes formed in the rotating drum; Detecting a water level that changes as bubbles are generated; Supplying additional detergent water into the water tank until the set water level is reached; It is characterized in that it comprises the step of washing the laundry using the foam filled in the laundry, the laundry is not immersed in the detergent water by driving the rotating drum.

In addition, the present invention further includes the step of sensing the load according to the weight of the laundry, the step of supplying the detergent-free water, characterized in that for controlling the amount of detergent-free water in accordance with the detected load amount.

In addition, the step of controlling the amount of detergent-free water according to the load amount, characterized in that the increase in the number of times to wet the laundry as the load increases.

In addition, controlling the amount of detergent-free water according to the load amount is characterized by increasing the amount of detergent-free water as the load amount increases.

In addition, increasing the amount of detergent-free water is characterized by increasing the water supply of the detergent-free water when wet once.

In addition, the present invention is characterized in that the rotating drum is operated while the laundry is initially wet with detergent-free water.

In addition, the wet step of wetting the laundry is characterized in that for operating the rotating drum at a predetermined rpm according to the load amount.

In addition, the present invention further includes the step of sensing the level of detergent water.

In addition, the level of the detergent water is characterized in that the detergent water is controlled so as to be maintained at the bubble generation level possible foaming without touching the laundry accommodated in the rotating drum.

In addition, when the detergent water is in the bubble generation water, it is characterized by generating a bubble.

In addition, when the foaming is above the appropriate level for washing, characterized in that for driving the rotating drum in which the laundry is put.

In addition, the present invention comprises the steps of detecting the water level of the detergent water changed by the foaming; When the sensed water level reaches the minimum level required for foaming, further supplying the washing water.

In addition, the minimum water level is characterized in that the heater safety level required for driving the washing heater when washing hot water using foam.

In addition, the present invention further includes the step of setting the number of re-water supply for additional supply of detergent water according to the load amount, the step of supplying additional detergent water, the additional supply operation of the wash water based on the set number of re-water supply It is characterized by controlling.

The present invention may further include heating the detergent water by driving the washing heater to a user set temperature. The heating of the detergent water to a user set temperature may be performed with foaming.

As described above, according to the washing machine and the washing control method thereof according to the present invention, washing with foam has an effect of reducing the amount of water used and increasing the washing power by the high concentration detergent on the foam surface.

In addition, it is possible to effectively carry out the washing administration using foam by soaking laundry before foaming so that the foam easily penetrates the laundry, and controlling the amount of wetting to wet the laundry according to the load of the washing machine to obtain the optimal wetting effect. There is an effect that can supply a suitable amount of water.

In addition, by performing a wetting control to wet the laundry according to the type of laundry, it is possible to reduce the damage to the cloth in the case of a small amount of fine washing that does not need the wetting control, it is possible to reduce the washing time.

1 is a cross-sectional view showing the configuration of a washing machine according to the present invention;
2 is a control block diagram of a laundry control apparatus for a washing machine according to the present invention;
3 is a flow chart of the overall operation of the washing control method using foam in the washing machine according to the present invention;
4A and 4B are detailed operation flowcharts of a washing administration using foam in a washing machine according to the present invention;
5 is an operation flowchart of controlling the amount of wet water in accordance with the load in the washing machine according to the present invention;
Figure 6 is a graph comparing the degree of washing of immersed in 60MU contaminated cloth and the same concentration of detergent water.

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

1 is a cross-sectional view showing the configuration of a washing machine using the foam of the present invention.

In Figure 1, the washing machine using the foam of the present invention is for the fresh water of the wash water, the drum-shaped water tank 11 is installed inside the main body 10, and is rotatably installed in the water tank (11) Rotating drum 12 formed with a plurality of dehydration holes.

The lower part of the tank 11 is provided with a motor 13 for rotating the rotating drum 12 in the forward or reverse direction to perform the washing, rinsing and dehydration operation, and select the user's water temperature in the lower side of the tank 11. Frequency changing according to the water level to detect the washing heater 16 for heating the wash water supplied into the water tank 11 and the amount (water level) of the washing water (or detergent concentrate) supplied to the water tank 11. Water level sensor 17 is installed to detect the.

The water level sensor 17 is the highest washing water level (appropriate water level required for foam generation; less than the first water level so that the detergent concentrate is not introduced into the rotating drum 12 into which laundry is put for washing using foam). Detergent that is supplied during washing by controlling the minimum washing level necessary for foaming (safety level until the washing heater is locked to the minimum level necessary for foaming; hereinafter referred to as the second level). When the amount of the concentrate reaches the first water level, the supply of the washing water is stopped to prevent the detergent concentrate from flowing into the rotating drum 12. When the amount of the detergent concentrate decreases gradually to the second water level due to foaming, Washing water is controlled to be supplied to the water tank (11) in order to maintain the level required for foaming.

In addition, the water level sensor 17, in addition to the first and second water level, by controlling the continuous water level control to maintain the foaming level that can generate bubbles without touching the laundry, and also to control the flow rate or time during washing The control measures to reduce the water level and to supply the amount of wash water required for foaming.

In addition, the water level sensor 17 is the washing water level (wetting amount set according to the load of the washing machine and the type of laundry; the amount of water without detergent, so as to wet the laundry before generating the foam in order to effectively wash the foam) , The third water level), so that the laundry soaks the laundry before foaming so that the foam easily penetrates the laundry.

An opening 14 is formed in front of the water tank 11 and the rotating drum 12 so that a user can take out clothing from the front of the main body 10, and opens and closes the opening 14 in front of the main body 10. The door 15 is installed.

The upper portion of the water tank 11 is provided with a detergent supply device 19 for supplying detergent, and a water supply device 20 for supplying the wash water.

The detergent supply device 19 is divided into a plurality of spaces inside, and is installed on the front side of the main body 10 so that the user can easily put detergent and rinsing agent in each space.

The water supply device 20 has a water supply pipe 22 for supplying the wash water and a water supply valve 24 installed in the water supply pipe 22 to control the water supply of the water supply pipe 22, and the water supply pipe 22 is provided from the outside. It is connected with the detergent supply device 19 so that the water supplied can be supplied toward the detergent supply device 19.

And between the detergent supply device 19 and the water tank 11, a separate connection pipe 26 is installed so that the washing water passed through the detergent supply device 19 can be supplied to the water tank 11 together with the detergent, the connection pipe At the outlet of 26, a water supply nozzle 28 is provided. This is for the detergent in the detergent supply device 19 is supplied to the inside of the water tank (11) with the wash water to form a high concentration of detergent concentrate for the foaming between the water tank (11) and the rotating drum (12).

In addition, the water supply device 20 is a supply water pipe connected to the water supply pipe 22 so as to additionally supply the wash water required for foaming when the water level is reduced by washing water or foaming to wet the laundry before generating bubbles And a replenishment water valve 32 installed in the replenishing water pipe 30 to control washing water supply to the water tank 11, wherein the replenishing water pipe 30 is water supplied through the water supply pipe 22. It is connected to the connecting pipe 26 so that it can be directly supplied to the water tank 11 without passing through the detergent supply device (19).

The feed water valve 32 is composed of a three-way valve for controlling the water supply direction of the wash water so that the wash water supplied through the water supply pipe 22 toward the detergent supply device 19 or the supply water pipe 31.

In addition, the present invention includes a drying device 40 for drying the laundry (clothing). The drying apparatus 40 includes a drying fan 41 installed on the top of the water tank 11, an air inlet 45 formed above the discharge port 41b of the drying fan 41 and the opening 14 of the water tank 11. Condensation mounted on the rear of the water tank 11 to connect between the drying duct 42, the air outlet 46 formed in the rear lower portion of the water tank 11 and the inlet 41a of the drying fan 41 to connect between And a duct 43.

The drying device 40 is a drying heater 44 installed inside the drying duct 42 to supply hot air into the water tank 11, and the condensation duct 43 is wet steam generated by drying the clothes. It includes a condenser installed in the condensation duct 43 so that the water is condensed in the process of passing through.

The condenser is installed on the inner upper portion of the condensation duct 43 and the cooling water injection nozzle 53 for injecting the cooling water into the condensation duct 43 and the water supply device 20 to supply the cooling water to the cooling water injection nozzle 53. Cooling water supply pipe 54 and the cooling water valve 55 is connected to the. The condenser has a dehumidifying effect by allowing the cooling water injected from the cooling water spray nozzle 53 on the upper portion to flow down to the lower portion along the inner surface of the condensation duct 43 so that the contact of the humid air rising from the lower portion with the cooling water is increased. It is to be improved.

In addition, the present invention is provided with a drainage device 50 for draining the water in the water tank (11). The drainage device 50 includes a drain pipe 51 connected to the lower part of the water tank 11 to guide the water in the water tank 11 to the outside, and a drain pump 52 installed on the water drain pipe 51.

In addition, the washing machine of the present invention is provided with an air supply device 60 to allow the laundry in the rotating drum 12 to be washed by the foam. The air supply device 60 is installed in the lower portion of the water tank 11, the air motor 61 for supplying air, the air supply pipe 62 for delivering the air supplied from the air motor 61, and the air supply pipe ( 62 includes a porous member 63 installed at the end of the air to disperse the supplied air, and the air supplied from the air motor 61 is dispersed while passing through the porous member 63 via the air supply pipe 62. Since bubbles are generated by bubbles in the detergent water mixed with the detergent concentrate and the wash water, the laundry inside the rotating drum 12 can be washed with only foam.

In addition, an air hole 64 through which the air from the air supply device 60 flows is formed in the water tank 11 in which the air supply device 60 is installed, and the air dispersed in the porous member 63 is provided in the water tank ( 11) and into the space between the rotating drum (12).

2 is a control configuration diagram of a washing machine washing apparatus according to the present invention, in addition to the apparatus shown in FIG. 1, a signal input unit 100, a temperature sensing unit 110, a drying sensing unit 120, a control unit 130, and a driving unit And 140.

The signal input unit 100 is a washing course (for example, general washing or delicate washing, etc.) and washing temperature set by the user (hereinafter, referred to as a set temperature) that the user selects according to the type of laundry when washing with foam. Operation information, such as dehydration RPM, rinse addition, is input to the controller 130.

The temperature detection unit 110 detects the temperature of the wash water supplied to the water tank 11, the dry detection unit 120 detects the temperature and humidity of the laundry to detect the dry state of the laundry.

The control unit 130 is a microcomputer that controls the washing machine according to the driving information input from the signal input unit 100, and the motor RPM and the driving rate (motor on-off time) set according to the load amount (weight of laundry) in the selected washing course. , Washing time, resupply number (N; the number of operations to resuppose water as the first level required for foaming when the water level decreases due to bubbles), and the optimum amount of wet water to wet the laundry according to the load The amount of water without detergent).

Therefore, the control unit 130 controls the amount of washing water supplied with foaming during laundering, controls the motor RPM, operation rate, and the amount of wet water according to the load, and sets the starting point of foaming according to the washing water temperature (water temperature). By controlling, the driving of the motor 13, the water supply device 20 and the air motor 61 is controlled to obtain an optimal washing effect while reducing cloth damage.

The driving unit 140 is a motor 13, a washing heater 16, a water supply valve 24, a feed water valve 32, a drying fan 41, a drying heater 44 in accordance with a drive control signal of the control unit 130. ), The drain pump 52, the coolant valve 55, the air motor 61 and the like.

Hereinafter, the operation process and the effect of the washing machine and the laundry control method configured as described above will be described.

According to the laundry control method of the washing machine of the present invention, the general washing and the delicate washing are selected according to the type of laundry in the foam washing course for washing the laundry using foam. 130 is provided with a button to select the general washing and fine washing in the foam washing course.

Figure 3 is a flow chart of the overall operation of the washing control method using foam in the washing machine according to the present invention.

When the laundry is put inside the rotating drum 12 and the user selects the laundering course, the driving information selected by the user is input to the controller 130 through the signal input unit 100.

Accordingly, the controller 130 determines whether the washing course selected by the user is a bubble washing course according to the driving information input from the signal input unit 100 (S200). Perform (S210).

If the washing course selected by the user is a foam washing course, the user selects a washing course (general washing or fine washing), operation temperature such as washing temperature, dehydration RPM, and rinsing according to the type of laundry (S300). The driving information is input through the signal input unit 100.

Accordingly, the control unit 130 detects the load amount (W; the weight of the laundry) put into the rotating drum 12 (S400), and according to the detected load amount (W), the washing water quantity, motor RPM and operation rate (for each washing course) Motor on-off time), washing time, the number of times of replenishment (N; the number of operations for resupplying water as much as the first level required for foaming when the water level decreases due to bubble generation) (S500).

Here, setting the number of times of replenishment (N) is for limiting the additional water supply operation according to the amount of laundry to reduce unnecessary water supply operation.

Accordingly, the control unit 130 performs the washing administration during the washing time set by using the foam with the washing water quantity, motor RPM and operation rate, washing time, resupply number (N) set for each washing course according to the load (W) (S600).

Washing operation due to foaming can reduce cloth damage caused by friction of laundry and strong water flow as the foam acts as a cushion during washing of the laundry, and also effectively removes the time when a small amount of water is used due to the high detergent concentration of foam. This can save energy.

As such, after the washing operation is performed according to the foaming, the rinsing and dehydration operation is performed according to the load amount (S700).

Hereinafter, a process (S600) of performing a washing operation by foaming, which is a technical feature of the present invention, will be described with reference to FIGS. 4A and 4B.

4A and 4B are detailed operation flowcharts of a washing administration using foam in the washing machine according to the present invention.

First, it is determined whether the washing course selected by the user is general washing (S602), and in the case of general washing, the controller 130 controls an optimal amount of wet water for wet washing according to a load (W; weight of laundry) ( S604).

This is to supply a quantity of water (specifically, detergent-free water that does not contain detergent) suitable for obtaining an optimum wetting effect by adjusting the amount of wetting to wet the laundry according to the load amount (W). This is to allow foam to easily penetrate the wet laundry.

When the wetness of the laundry is controlled by controlling the wetness amount (specifically, the amount of detergent-free water) according to the load amount W, the controller 130 supplies the water supply valve 24 and the replenishment water to supply a high concentration of detergent concentrate required for foaming. The valve 32 is controlled so that the wash water is supplied to the water tank 11 via the detergent supply device 19 via the water supply pipe 22. At this time, the detergent in the detergent supply device 19 is dissolved in the wash water being supplied to the water tank 11 through the water supply nozzle 28 through the connection pipe 26 with the wash water and the lower portion of the water tank 11 (Specifically, between the water tank and the rotating drum), a detergent concentrate (a state where the detergent is concentrated in the washing water) is supplied (S606).

On the other hand, if it is not the general washing in S602, the control unit 130 determines that it is a delicate washing and proceeds to S606 to supply a high concentration of detergent concentrate required for foaming immediately without wetting control to wet the laundry according to the load (W). .

This is to avoid unnecessary wetting control because foam can easily penetrate the laundry when washing with foam because the volume of the laundry is small even if a small amount of washing such as delicate washing does not wet the laundry. In the case of washing, after washing the laundry in the initial stage of water supply, the washing of the foam is controlled.

As the wash water (detergent water) containing the detergent is supplied to the water tank 11, a detergent concentrate in which detergent and wash water are mixed between the water tank 11 and the rotary drum 12 is formed. The water level is sensed by the water level sensor 17 to determine whether it is the first predetermined water level (about 1/4 of the general washing level at the highest level until the washing water supplied into the tank does not flow into the rotating drum) ( S608).

If the water level is not the first water level, the washing water including the detergent is continuously supplied until the first water level is reached. If the water level is the first water level, the water supply valve 24 and the supply water valve 32 are controlled by the controller 130. Off to stop the washing water supply (S610).

Thereafter, in order to wash the laundry inside the rotating drum 12 using foam, the motor 13 is stopped while driving the washing heater 16 to heat the detergent concentrate to a temperature suitable for foaming (S612). The reason for stopping the motor 13 is to quickly heat the detergent concentrate to a temperature suitable for foaming.

At this time, since the amount of water supplied between the water tank 11 and the rotating drum 12 is smaller than that of the conventional water, the water can be heated as quickly as possible through the washing heater 16, thereby reducing the overall washing time and at the same time energy for heating the water. Can be saved.

In this way, by detecting the temperature (water temperature) of the detergent concentrate heated by the driving of the washing heater 16 in the temperature detection unit 110 to determine whether or not the predetermined bubble generation temperature (temperature well foaming, about 30 ℃). (S614).

If the water temperature is not higher than the foaming temperature, the washing heater 16 is continuously driven until the foaming temperature is reached. If the water temperature is higher than the foaming temperature, the controller 130 drives the air motor 61 for foaming. By supplying air to the detergent concentrate mixed with detergent and wash water to generate bubbles (S616), the method of generating bubbles is the air supplied from the air motor 61 through the air supply pipe 62 through the porous member ( After passing through 63) is dispersed through the air hole 64 in the detergent concentrate mixed with detergent and wash water to generate bubbles.

On the other hand, the present invention has been described by taking foaming using the porous member 63 as an example, the present invention is not limited to this, any configuration capable of foaming is possible.

Bubbles generated between the water tank 11 and the rotating drum 12 are introduced into the rotating drum 12 through the hole or the front portion of the rotating drum 12, at which time the bubbles begin to be introduced into the rotating drum 12. After a predetermined time (about 3 minutes) is dispersed throughout the inside of the rotating drum 12 to wash the laundry inside the rotating drum 12 only with foam.

At this time, the controller 130 determines whether the water temperature is higher than the set temperature set by the user when bubbles start to be generated according to the driving of the air motor 61 (S617). The heater 16 is stopped (S618).

This is for heating the detergent concentrate to the foaming temperature (about 30 ° C.) where foaming is easily generated by driving the washing heater 16 and then heating the detergent concentrate to a user set temperature (minimum, 40 ° C.). By starting the heating of the detergent concentrate by the drive of reaching the user set temperature to stop the washing heater 16 to proceed to the hot water washing using the foam to the optimum conditions desired by the user.

In addition, the control unit 130 is a bubble amount detection level for detecting the amount of foam is introduced into the rotating drum 12 to start the bubble generation (starting bubble generation from the first water level to the amount of foam suitable for the washing process proceeds) When the water level occurs; it is determined whether the inside 1/3 of the rotating drum is full of bubbles) (S619).

If the bubble level is detected, the controller 130 drives the motor 13 to proceed with washing using the foam to drive the rotating drum 12 at a predetermined second RPM (less than the washing RPM) and an operation rate (S620). .

When such foaming occurs, it is preferable to use a value equal to or less than the value set according to the load of the set RPM, operation rate, and washing time of the rotating drum 12.

When bubbles are contained in the laundry with a high detergent concentration of foam dispersed throughout the inside of the rotating drum 12 by the rotation of the rotating drum 12, bubbles are effectively removed, and the drop and laundry due to the rotation of the rotating drum 12 are The foam acts as a cushion when rubbing, so that the cloth can be prevented from rubbing.

Thereafter, as the washing process proceeds due to the foaming, the amount of detergent concentrate begins to decrease. At this time, the water level of the detergent concentrate that is lowered is detected by the water level sensor 17 so as to detect a second predetermined water level (minimum required for foam generation). It is determined whether or not the washing water level to the safety level of the washing heater) (S622).

If the water level is not the second level, the washing machine continues to rotate with the rotation of the rotating drum 12 with foaming until the second level is reached. If the level is the second level, the air motor 61 stops the foaming. ) Is stopped (S624).

When the water level reaches the second water level and the air motor 61 is stopped, the controller 130 determines whether the rewatering operation for additional watering of water required for bubble generation is repeated for the set number of times of rewatering (N) ( S626).

If the rewatering operation is not repeated for the set number of rewatering times (N) in S626, the controller 130 controls the water supply valve 24 and the replenishment water supply valve 32 to additionally supply water for bubble generation. The water is not supplied to the detergent supply device 19 via the water supply pipe 22, but the washing water supplied to the water tank 11 through the water supply nozzle 28 while passing through the connection pipe 26 through the supply water pipe 31 is added. Water is supplied (S628). This is to maintain the foaming level required for foaming.

As such, as the washing water is additionally supplied to the water tank 11, the water level sensor 17 detects the water level rising between the water tank 11 and the rotary drum 12 to determine whether the water level is the first predetermined water level (S630).

If the water level is not the first water level, the washing water is continuously supplied to the water tank 11 until the first water level is reached. If the water level is the first water level, the controller 130 supplies the water supply valve 24 to the water level. And turning off the feed water valve 32 to stop washing water additional water supply (refeed water) (S632), and proceeds to operation S612 or less until the feed water is fed back to S612 and the water supply number N is reached. do.

Next, in the case of general washing for washing a large number of laundry in the foam washing course (S604) of controlling the amount of wet according to the load (W) will be described with reference to FIG.

5 is an operation flowchart of controlling the amount of wet water in accordance with the load in the washing machine according to the present invention.

When the general washing is selected in the bubble washing course, the controller 130 controls the amount of wet water (the amount of water without detergent) according to the detected load (W), there are two methods of controlling the amount of wet water.

First, as the load increases, the number of wetting times is increased to increase the amount of wetting (the amount of water without detergent). For example, if the load is 0-1 kg, the number of wetting is 0, and the load is 1-3 kg. If the number of wetting time is 1, if the load is 3 ~ 6㎏, the number of wetting time is 3 and if the load is 6 ~ 10㎏, the number of wetting time is 5 so that the laundry is soaked evenly according to the load.

Second, if the load is large, increase the water supply when wetting once to increase the amount of wet water (the amount of water without detergent) .For example, if the load is 0 ~ 1㎏, the amount of wet water is 0, and the load is 1 If it is ~ 3㎏, wetting water is 3L, if the load is 3 ~ 6㎏, wetting water is 5L and if the load is 6 ~ 10kg, wetting water is 10L so that the laundry is wet evenly according to the load. .

Any of the above methods can supply the wet water amount (the amount of water without detergent) suitable for the load amount (W), in the present invention with reference to the second method of adjusting the water supply amount to control the wet water amount according to the load amount (W) Explain.

That is, if the detected load amount W is 1 kg or less (S6042), the wet amount Dw is set to 0 (S6044), and if the load amount W is 1 to 3 kg (S6046), the wet amount Dw is set. Set to 3L (S6048), if the load amount (W) is 3-6 kg (S6050) and set the wet water amount (Dw) to 5L (S6052), if the load amount (W) is not 3-6 kg 6kg It judges that it is abnormal, and sets the wetting quantity Dw to 10L (S6056).

When the wet water amount Dw (amount of detergent-free water) is set according to the load amount W, the controller 130 controls the water supply valve 24 and the water supply valve 32 to wash the laundry water to wet the laundry. Without supplying water to the detergent supply device 19), the feed water pipe 30 and the connection pipe 26 are directly supplied to the water tank 11 through the water supply nozzle 28 (S6058).

This is to soak the laundry before generating the foam in order to effectively perform the washing administration using the foam to reduce the volume of the laundry so that the foam easily penetrates the laundry.

As such, as the washing water required to wet the laundry is directly supplied to the water tank 11, the water level of the washing water supplied to the water tank 11 is sensed by the water level sensor 17 to determine a predetermined third water level (depending on the load). It is determined whether or not the set amount of wetting water (S6060).

If the washing water level is not the third water level, the washing water is continuously supplied directly to the water tank 11 until the third water level is reached. If the washing water level is the third water level, the water supply valve 24 and the supply water are controlled by the controller 130. The water supply is stopped by turning off the valve 32 (S6062).

After stopping the water supply, the controller 130 drives the motor 13 to wet the laundry by the water supplied to the water tank 11 to rotate the rotating drum 12 at a predetermined first RPM (less than washing RPM) and an operation rate. Operation (S6064).

In this wet operation, it is preferable to use a value equal to or less than the value set for each washing course according to the load RPM and operation rate of the rotating drum 12.

Therefore, the control unit 130 counts the motor driving time to wet the laundry and determines whether a predetermined set time (about 5 minutes) has elapsed (S6066). In order to supply the process, the process proceeds to S606 and repeats the operations of S606 and below.

On the other hand, the present invention has been described taking the process of wet washing in the case of general washing in the foam washing course, for example, the present invention is not limited to this, of course, the process of wetting administration is also possible.

The result of the washing operation by the foam of the present invention is shown in FIG.

FIG. 6 is a graph comparing cleanliness of 60MU (Make Up) artificial pollutants with the same concentration of detergent water and foam immersion, showing reflectance (%) at the same concentration of detergent (2g, 4g, 10g). .

As can be seen in Figure 6, it can be seen that the washing degree of the washing administration using the foam is significantly higher than the washing degree of the washing administration by the normal detergent water.

11: tank 12: rotating drum
17: water level sensor 19: detergent supply device
20: water supply device 22: water supply pipe
24: water supply valve 26: connection pipe
30: supply water pipe 32: supply water valve
40: drying device 60: air supply device
61: air motor 130: control unit

Claims (15)

In the laundry control method of the washing machine having a water tank and a rotating drum rotatably installed in the water tank to accommodate laundry,
Supplying laundry-free water to the rotary drum and supplying detergent-free water not containing detergent to the water tank;
Supplying the detergent-free water to the tank, and supplying detergent water containing detergent into the tank;
Supplying air to the detergent water by using an air supply device installed at the bottom of the water tank to generate bubbles, and introducing the generated bubbles into the rotating drum through holes formed in the rotating drum;
Detecting a water level that changes as the bubble is generated;
Supplying additional detergent water into the water tank until the set water level is reached;
Washing control method of the washing machine comprising driving the rotary drum to wash the laundry using the foam filled in the laundry, the laundry is not immersed in the detergent water. The method of claim 1,
The method may further include detecting a load according to the weight of the laundry.
Supplying the detergent-free water,
Washing control method of the washing machine, characterized in that for controlling the amount of water without detergent in accordance with the detected load. The method of claim 2,
Controlling the amount of detergent-free water according to the load amount,
Washing control method of the washing machine, characterized in that for increasing the amount of the load increases the number of times to wet the laundry. The method of claim 2,
Controlling the amount of detergent-free water according to the load amount,
Washing control method of the washing machine, characterized in that to increase the amount of water without detergent as the load increases. The method of claim 4, wherein
Increasing the amount of water without detergent,
Washing control method of the washing machine, characterized in that for increasing the water supply of detergent-free water when wet. The method of claim 1,
Washing control method of the washing machine, characterized in that for operating the rotary drum while initially washing the laundry with the detergent-free water. The method of claim 6,
Soaking step to wet the laundry,
Washing control method characterized in that for operating the rotating drum at a rpm determined according to the load amount. The method of claim 1,
Washing control method of the washing machine further comprising the step of sensing the level of the detergent water. The method of claim 8,
The level of the detergent water is laundry control method of the washing machine characterized in that the detergent water is controlled to be maintained at the bubble generation level possible foaming without touching the laundry accommodated in the rotary drum. The method of claim 9,
Washing control method of the washing machine, characterized in that for generating the bubble when the detergent water is in the bubble generation water level. The method of claim 10,
Washing control method of the washing machine characterized in that to operate the rotating drum in which the laundry is introduced when the foaming is more than the appropriate level for washing. The method of claim 9,
Sensing the level of detergent water changed by the foaming;
And supplying additional washing water when the detected water level reaches a minimum level required for foaming. The method of claim 12,
The minimum water level is a washing control method of the washing machine, characterized in that the heater safety level required for driving the washing heater during the hot water washing using foam. The method of claim 12,
Setting the number of refueling times for supplying additional detergent water according to the load amount,
Supplying the detergent water further,
Washing control method of the washing machine, characterized in that for controlling the additional supply operation of the wash water based on the set number of re-feed. The method of claim 1,
Further comprising: driving the washing heater to a user set temperature to heat the detergent water;
Heating the detergent water to a user set temperature,
Washing control method of the washing machine characterized in that it proceeds with the foaming.

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