KR20080010593A - Control method of drum type washing machine - Google Patents

Abstract

A method for regulating water level for each weight of laundry of a front loading washing machine is provided to reduce noise by minimizing drop when washing a small quantity of laundry. A method for regulating water level for each weight of laundry of a front loading washing machine comprises the steps: sensing weight of laundry in a drum(S1); and supplying water with different water levels in accordance with sensed weight of laundry(S3,S7,S10,S13). The sensed weight of laundry is classified with three levels(S2,S6,S9,S12).

Description

Water level adjustment method of drum washing machine {Control method of drum type washing machine}

1 is a cross-sectional view showing an example of a drum washing machine to which the first embodiment of the method for adjusting the water level according to the quantity of the drum washing machine according to the present invention;

Figure 2 is a flow chart showing a first embodiment of the method for adjusting the water level according to the quantity of the drum washing machine according to the present invention,

3 is a cross-sectional view of the drum showing the water supply level when the amount is small,

Figure 4 is a cross-sectional view of the drum showing the water supply level when the amount is medium small,

5 is a cross-sectional view of the drum showing the water supply level when the quantity is a medium;

Fig. 6 is a cross sectional view of the drum showing the water supply level when the amount of water is large;

<Explanation of symbols on main parts of the drawings>

The present invention relates to a method for adjusting the water level for each volume of a drum washing machine, and more particularly, to a method for adjusting the water level for a drum washing machine for minimizing the noise that may be generated when the bag is dropped and dropped on the drum during small and heavy washing of the drum washing machine. Much

In general, a washing machine is a device that removes contaminants from clothing, etc. (hereinafter referred to as `` po '') by using the action of detergent and water, and is largely agitator type, pulsator type and drum type (drum). type) It is divided into washing machine.

The stirring type washing by rotating the laundry rod towering in the center of the washing tank to the left and right, the vortex type to rotate the disk-shaped pulsator or the washing tank to the left and right to wash by using the friction between the water flow and the cloth The drum type rotates the drum which the lifter protrudes, and the lifter raises a cloth and drops it to wash it.

Among the washing machines, the drum washing machine is formed to open and close the front and rear sides of the drum front and rear of the drum, and to wash the fabric using friction between the fabric and the drop of the fabric, so that the water level is stirred or vortex Set lower than the equation to minimize water consumption.

On the other hand, the drum washing machine supplies water only up to a constant water level (hereinafter referred to as a reference level) regardless of the amount of water, and when the water reaches the standard level, the water is stopped and the drum is rotated to rotate the drum only with a small amount of water. Wash or rinse.

The drum washing machine has a lot of friction between the fabrics tumbling together in the drum when there are a large number of fabrics inside the drum when a large amount of fabric is introduced into the drum, and when the small amount of fabric is injected into the drum, the drum washing machine is tumbling together. More friction or collision with the drum inside the drum than the friction between the fabrics.

However, in the conventional drum washing machine, when small and heavy fabrics are introduced into the drum, the friction of the drums is lower than the friction between the fabrics tumbling together in the drum. There is a problem in that a "muffled" noise occurs when the gun falls on the drum.

The present invention has been made to solve the above problems of the prior art, to provide a method for adjusting the water level for each volume of the drum washing machine to minimize the noise generated when the bag falls on the drum by minimizing the drop height of the cloth when small, heavy washing Its purpose is to.

According to an aspect of the present invention, there is provided a method for adjusting the water level of a drum washing machine according to the present invention, comprising: a quantity sensing step of sensing an amount of cloth injected into a drum washing machine; It is configured to include a water supply step of supplying water by varying the water supply level according to the detected amount of water.

The water supply step classifies the level of the detected quantity of water into small / medium / medium / high and increases the water supply level as the classified level goes from large to small.

In the water supply step, the water level frequency of the water level detector is set differently according to the classified level.

The water supply step supplies water to the reference level when the classified level is large.

In the water supply step, when the level of the detected amount is low, the water supply level is supplied higher than when the level of the detected amount is high.

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

1 is a longitudinal sectional view showing an example of a drum washing machine to which the first embodiment of the method for adjusting the water level according to the quantity of the drum washing machine according to the present invention is applied.

 The drum washing machine shown in FIG. And a casing (2), a tub (10) installed in the casing (2), a drum (20) housed in an inner space of the tub (10), and a motor (30) for rotating the drum (20). do.

The casing 2 includes a base 3, a cabinet 4 mounted on an upper side of the base 3, and a cabinet cover 5 mounted on a front surface of the cabinet 4 and having a gun entry hole 5a. ), A door (9) rotatably mounted on the cabinet cover (5) to open and close the artillery access hole (5a), and a top plate (6) mounted on an upper surface of the cabinet (4). .

On the upper surface of the top plate 6 or the upper part of the cabinet cover 5, a control panel 7 input by a user for selecting washing, rinsing, dehydration stroke, etc. of the drum washing machine is mounted.

The tub 10 is a fresh water for washing or rinsing, and collects the dewatered water from the fabric, and consists of a cylinder lying horizontally or inclined forward, and the cloth inlet hole 5a of the cabinet cover 5. An opening hole 12 is formed at a rear side, and a gasket 14 having a sealing part in close contact with the door 9 is mounted at a circumferential front of the opening hole 12.

The tub 10 is supported by the damper 4a on the upper side of the base 3 so as to be buffered, and supported by the spring 4a on the cabinet 4.

The drum 20 is to be received for washing, rinsing, dehydration, and the like, and is spaced apart from the inner surface of the tub 10.

The drum 20 is formed of a cylinder lying horizontally or inclined forward, the entrance hole 21 is formed so that the cloth (m) is allowed to enter the front portion, and water flows into the circumference or the rear portion A plurality of handmade holes 22 are formed, and a lifter 23 is mounted on the inner circumferential surface of the circumference to lift and drop the laundry m.

The motor 30 includes a stator 32 mounted on the rear surface of the tub 10, a rotor 34 rotated in interaction with the stator 32, and the rotor to rotate together with the rotor. It consists of the rotating shaft 36 built in 32. As shown in FIG.

The stator 32 is provided with a hall sensor 33 so as to measure the rotation angle or ALPM of the rotor 34.

The rotating shaft 36 is disposed to penetrate the rear portion of the tub 10, is rotatably supported by bearings 37 and 38 mounted to the tub, and a rear end thereof is built up in the rotor 32. The front end is connected to the rear side of the drum 20.

The upper side of the tub 10 is connected to a water supply device for supplying clean water without detergent or water containing detergent to the inside of the tub 10.

The water supply device is connected to the external hose 40, the water supply valve 41 for regulating the clean water supplied through the external hose 40 and the water supply hose for guiding the water passing through the water supply valve 41 ( 42) and a detergent container 43 having a detergent storage space, a water supply passage, and an outlet for mixing the water supplied through the water supply hose 42 with the detergent stored in advance, and the detergent discharged from the detergent container 43. Is connected to the outlet of the detergent container 43 and the other end to the water inlet formed on the upper side of the tub 10 so as to guide the inside of the tub 10 with clean water containing no water or detergent included. And connected bellows tube (44).

In addition, a drain 15 for draining water is formed at the lower side of the tub 10, and a draining bellows tube 48 for guiding the drained water is connected to the drain 15.

The drainage bellows pipe 48 pumps water drained from the tub 10 through the drain hole 15 and the draining bellows pipe 48 to be discharged to the outside or circulated back into the drum 20. 50 are connected.

The pump unit 50 includes a pump case 52 and a drain pump 54.

The pump case 52 is formed with a connector to which the drain bellows pipe 48 is connected, and a flow path through which water passes is formed in communication with the drain pump 54, and foreign substances such as seams mixed in the water are filtered out. Is equipped with a filter (not shown).

A drain hose 55 disposed to extend outside the casing 2 is connected to the drain pump 54 so that water introduced into the pump case 52 at the time of drainage of the drum washing machine is connected to the drain hose 55. Drain to the outside via

On the other hand, the drum washing machine is provided with a water level detection device for detecting the water level of the water supplied.

The water level detection device is connected to the water level detection bellows pipe (80) connected to one side of the drain bellows pipe (48), and the water level detection bellows pipe (80) through the bottom of the water filled in the water level detection bellows (80) An air chamber 82 filled with air acting on pressure according to the water level, a water level detecting tube 84 having a lower end connected to one side of the air chamber 82, and an upper end of the water level detecting tube 84 are connected to each other. It is configured to include a water level sensor 86, which is a water level detector for sensing the air pressure in the water level detection tube 84.

Reference numeral 90 denotes the motor 30 according to the operation of the control panel 7, the water level detected by the water level sensor 86, and the amount of water detected by the ALPM measured by the hall sensor 33. It is a control part which controls the water supply valve 42, the drain pump 54, etc.

2 is a flowchart illustrating a first embodiment of the method for adjusting the water level according to the quantity of the drum washing machine according to the present invention.

As shown in FIG. 2, the method for adjusting the water level according to the quantity of the drum washing machine according to the present embodiment includes a large quantity detection S1 and a water supply step S2 to S14.

Here, the quantity detection (S1) may calculate the amount of dose according to the time it takes to rotate one rotation by rotating the rotor 34 of the motor 30, and the motor 30 is started to maintain a constant speed for a predetermined time. After holding, the motor 30 is turned off, and the pulse width modulation (PWM) duty value from the start of the motor 30 to the end of the constant speed maintenance and the rotation angle of the force after turning off the motor 30 are measured. It is also possible to calculate the amount of capacity according to the pulse width modulation (PWM) duty value and the rotational rotation angle, and of course, it is also possible to calculate by other methods other than the above calculation.

In the drum washing machine according to the present embodiment, the water level adjustment method according to the quantity of water is set at least one of washing level and rinsing level (hereinafter, referred to as water supply level (H)) according to the amount of water according to the result of the quantity detection (S1). And, the water supply step (S2 ~ S12) for supplying water to the water supply level (H).

Hereinafter, the water supply step (S2 ~ S12) will be described in detail.

First, the controller 90 classifies the detected quantity into a plurality of dose levels.

Here, the plurality of dose levels will be described as being limited to 1 to 7 levels.

The controller 90 classifies the levels 1 to 7 of the detected amount of water into small, medium, medium and large levels again, and according to the classified levels, that is, small, small, medium and large levels, the water level detector tool ( Set water level frequency of 86) to change water level H different for each level of small / small / medium / large.

3 is a cross-sectional view of the drum showing the water supply level when the small amount is small, FIG. 4 is a cross-sectional view of the drum showing the water level when the small amount is small, Figure 5 is a water supply level when the large amount of water is shown Fig. 6 is a cross sectional view of the drum in which the water supply level in the case of a large amount of water is shown.

As shown in FIGS. 3 to 6, when the classified level is small, the water supply level H is highest, and when the classified level is large, the water supply level H is lowest, and the water level is gradually increased from the large to the small. Increase H) gradually.

That is, when there are few guns, since there are few guns in the drum 20, the drop of the gun falling from the inside of the drum 20 becomes large, and the noise caused by the collision between the gun and the drum 20 becomes large. Increase the water level (H) to reduce the height.

On the other hand, if there are many guns, there are a lot of guns inside the drum 20, so that the guns dropped from the inner upper part of the drum 20 fall while rubbing together with other guns tumbling together in the drum 20, so that the gun and the drum 20 Since the noise due to the collision is small, as described above, the water supply level (H) is lowered in order to minimize water consumption when there are many guns.

In general, when the quantity is below medium, the drop of the gun becomes large. When the quantity is large, water is supplied by the normal water supply level of the drum washing machine (H ₀ ; In the case of small water, it is preferable to water the water at a water supply level (H ₁ , H ₂ , H ₃ ) higher than the reference water level (H ₀ ).

If the level of gunpowder is 1, classify it as small, if the level of gunpowder is 2, classify it as medium, if the level of gunpowder is 3, classify it as medium, and classify it as if it is 4 ~ 7. The description will be limited.

In addition, the water level (H) is included on the amount of soil when the reference water level (H ₀₎ than the first setting level (m1) by being set to a high level (H _1), the reference water level (H _0), if included the amount of medium-sized one The water level H ₂ is set higher than the second set water level m2 (m2 <m1), and when the amount is medium, the water level higher than the reference water level H ₀ by the third set water level m3: m3 <m2 H ₃ ).

On the other hand, as shown in FIG. 2, the control unit 90 turns on the water supply valve 41 to supply water when the level of the quantity is 1 (S2) (S3).

Water supplied through the water supply valve 41 is gradually filled in the inner lower portion of the tub 10, wherein the water level frequency detected by the water level sensor 86 is the first set water level (m1) than the reference water level (H ₀ ) ) as a high level (H _1), the frequency (e.g. 23,4Hz) in early, the controller 90 is based on the water level (H ₀₎ than the first water level (m1) high level (H ₁₎ as corresponding to the It is determined that the water is supplied with water, and washing or rinsing is performed. (S3) (S4)

That is, the controller 90 turns off the water supply valve 41 and drives the motor 30 to rotate the drum 20 so that washing or rinsing may proceed.

As described above, when the drum 20 is rotated as described above, when the drum 20 is rotated, the cloth m falling from the inner upper portion of the drum 20 is first of water than the reference water level H ₀ , as shown in FIG. 3. Since water is supplied by the water level H ₁ as high as the set water level m1, the actual drop inside the drum 20 is smaller by the first set water level m1 than when water is supplied to the reference water level H ₀ . Therefore, the noise is smaller than when the drop of the gun (m) is large.

On the other hand, as shown in Fig. 2, the control unit 90 turns on the water supply valve 41 to supply water when the level of the quantity is 2 (S6) (S7).

Water supplied through the water supply valve 41 is gradually filled in the inner lower portion of the tub 10, wherein the water level frequency detected by the water level sensor 86 is a second set water level (m2) than the reference water level (H ₀ ) When the frequency corresponding to the water level H ₂ corresponding to the high water level H ₂ is reached (for example, 23,5 Hz), the controller 90 moves to the water level H ₂ higher than the reference water level H ₀ by the second set water level m2. It is determined that the water is watered, and washing or rinsing is performed. (S8) (S5)

That is, the controller 90 turns off the water supply valve 41 and drives the motor 30 to rotate the drum 20 so that washing or rinsing may proceed.

When the drum 20 is rotated as described above, when the drum 20 is rotated, the cloth m falling from the inner upper portion of the drum 20 is lower than the reference water level H ₀ as shown in FIG. 4. Since water is supplied by the water level H ₂ as high as the set water level m2, the actual drop inside the drum 20 is smaller by the second set water level m2 than when water is supplied to the reference water level H ₀ . The noise becomes smaller than when the drop of the cloth m is large.

On the other hand, as shown in FIG. 2, when the level of the quantity of water is 3, the controller 90 turns on the water supply valve 41 to supply water. (S9) (S10)

Water supplied through the water supply valve 41 is gradually filled in the inner lower portion of the tub 10, wherein the water level frequency detected by the water level sensor 86 is a third set level (m3) than the reference level (H ₀ ) When the frequency corresponding to the water level H ₃ corresponding to the water level H ₃ is reached (for example, 23,6 Hz), the controller 90 moves to the water level H ₃ higher than the reference water level H ₀ by the third set water level m3. It is determined that the water is supplied, and washing or rinsing is performed. (S11) (S5)

That is, the controller 90 turns off the water supply valve 41 and drives the motor 30 to rotate the drum 20 so that washing or rinsing may proceed.

As described above, when the drum 20 is rotated in the case of a large quantity as described above, as shown in FIG. 5, the water (m) dropped from the inner upper portion of the drum 20 is less than the reference water level H ₀ . Since water is supplied by the water level H _{3 that} is as high as the set water level m3, the actual drop inside the drum 20 is smaller by the third set water level m3 than when water is supplied to the reference water level H ₀ . Therefore, the noise is smaller than when the drop of the gun (m) is large.

On the other hand, the control unit 90, as shown in Figure 2, when the level of the amount of discharge is any one of 4-7, the level of the amount of water is classified according to each other, turn on the water supply valve 41 to supply water. (S12) (S13)

The water supplied through the water supply valve 41 gradually rises to the inner lower portion of the tub 10, and the frequency (for example, the water level frequency detected by the water level sensor 86 corresponds to the reference water level H ₀ ) (for example, 23, 9 Hz), the control unit 90 determines that the water is supplied to the reference water level H ₀ as shown in FIG. 3, and performs washing or rinsing. (S14) (S5)

That is, the controller 90 turns off the water supply valve 41 and drives the motor 30 to rotate the drum 20 so that washing or rinsing may proceed.

When the drum 20 is rotated in the case of a large amount as described above, the fabric m falling from the inner upper portion of the drum 20 is mutually intersected with other artillers tumbling together in the drum 20, as shown in FIG. 6. Falling while rubbing, the noise generated when it hits the drum 20 is not large.

 7 is a flowchart illustrating a second embodiment of the method for adjusting the water level according to the quantity of the drum washing machine according to the present invention.

In the drum washing machine according to the present embodiment, the water level adjustment method according to the amount of water is not divided into small / medium / medium / large amounts, and when the amount is less than the set value, the set water level (m) is lower than the reference water level (H ₀ ) ) Supply water at high water level (H ₁ ), and if the quantity is above the set value, supply water at the standard water level (H _O ).

Here, the set value is a quantity in which a large amount of noise due to the collision between the cloth and the drum 20 is generated, and is set by an experiment or the like.

Hereinafter, the comparison of the quantity and the set value and the water supply accordingly will be described in detail.

First, the controller 90 detects a quantity of dose and compares the detected quantity with a set value. (S101) (S102)

The control unit 90 sets the water supply level H as the water level H ₁ higher than the reference water level H ₀ by the set water level m when the amount is less than the set value, and turns on the water supply valve 41 to supply water. (S103)

Water supplied through the water supply valve 41 is gradually filled in the inner lower portion of the tub 10, wherein the water level frequency detected by the water level sensor 86 is set by the set water level (m) than the reference water level (H ₀ ) When the frequency corresponding to the high water level H ₁ is reached (for example, 23,4 Hz), the controller 90 supplies water to the water level H ₁ higher by the set water level m than the reference water level H ₀ . It is judged that the washing or rinsing is performed. (S104) (S105)

That is, the controller 90 turns off the water supply valve 41 and drives the motor 30 to rotate the drum 20 so that washing or rinsing may proceed.

On the other hand, if the quantity is less than the set value, the controller 90 sets the water supply level H as the reference water level H _O , and turns on the water supply valve 41 to supply water.

Water supplied through the water supply valve 41 is gradually filled in the inner lower portion of the tub 10, wherein the water level frequency detected by the water level sensor 86 corresponds to the reference water level (H ₀ ) (for example, For example, when it reaches 23,9 Hz, the control unit 90 determines that water is supplied at the reference water level H ₀ , and performs washing or rinsing. (S107) (S105)

On the other hand, the present invention is not limited to the above embodiments, it is also possible to vary the water supply level for each level (1 ~ 7) of the detected quantity without classifying the level of the small / medium / medium / large quantity Of course, it is also possible to gradually lower the water supply level by a certain ratio for each level (1-7) or small / medium / medium / large level, and various implementations are possible within the technical scope of the present invention. to be.

In the above-described method for adjusting the water level according to the quantity of the drum washing machine of the present invention configured as described above, the water supply level varies depending on the amount of the cloth injected into the drum washing machine, and in particular, the water supply level when washing / rinsing medium and small amounts of cloth is large. It is possible to lower the drop height of the cloth when washing and rinsing the medium and small amount of cloth, because the water level is higher than the water supply level when washing and rinsing the cloth. There is an advantage that can be minimized.

Claims (5)

A quantity detecting step of detecting an amount of the cloth introduced into the drum washing machine; And a water supply step of supplying water by varying the water supply level according to the detected amount of water.  The method of claim 1, The water supply step classifies the level of the detected amount of small / medium / medium / high, The level control method according to the quantity of the drum washing machine, characterized in that the water supply level is increased as the classified level goes from the small to the small. The method of claim 2, The water supply step is a water level adjustment method according to the quantity of the drum washing machine, characterized in that the water level frequency is set differently according to the classified level. The method of claim 2, The water supply step is a water level adjustment method according to the quantity of the drum washing machine, characterized in that the water supply to the standard water level when the classified level.  The method of claim 1, Wherein the water supply step if the level of the detected amount of water is low, the amount of water level for each drum washing machine, characterized in that for supplying a higher water supply level than if the level of the detected amount is high.

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