KR100625380B1 - Drum type washing machine - Google Patents

Abstract

Provided is a drum type washing machine using detergent foam to improve cleaning power.

At the start of washing, water is supplied to the second predetermined level lower than the first predetermined level corresponding to the amount of laundry in the water tank 3, and the rotary drum 5 is rotated at a second predetermined rotational speed faster than the first predetermined rotational speed at the time of washing. Drive to rotate. The flow of water generated by the rotation of the rotary drum 5 is caused by turbulence by the side wall 20a of the drain groove 20 formed at the bottom of the water tank 3, whereby detergent foam is generated. Since the generated detergent foam penetrates from the opening of the rotary drum 5 and adheres to the laundry, the laundry foam is buried in every corner of the laundry by rotating the rotary drum 5 at a second predetermined rotational speed to infiltrate the detergent liquid. High cleaning power is added by this.

Description

Drum-type washing machine {DRUM TYPE WASHING MACHINE}             

1 is a cross-sectional view showing a main part configuration of a drum type washing machine according to an embodiment;

2 is a block diagram showing the configuration of a control apparatus provided in the drum type washing machine according to the embodiment;

3 is a flowchart showing the procedure of water supply control and rotation control by the controller according to the embodiment;

4 is a cross-sectional view showing a configuration of a wall portion provided in a water tank;

5 is a cross-sectional view showing an example in which a wall portion provided in a water tank is formed as a protrusion;

6 is a cross-sectional view showing a configuration of a drum type washing machine according to the prior art.

Explanation of symbols for the main parts of the drawings

1: drum type washing machine 2: washing machine housing

3: water tank 4: drum drive motor

5: rotating drum 10: controller

20: drain groove 20a: side wall (turbulence generating means)

28: protrusion (turbulence generating means)

The present invention relates to a drum type washing machine which executes a process such as washing, rinsing, and dehydrating in a rotating drum rotatably supported in a water tank in a horizontal direction or in a direction inclined from the horizontal direction.

The conventional structural example of a drum type washing machine is shown in FIG. As shown in the drawing, in the water tank 53 supported by the suspension structure in the washing machine housing body 57, a rotating drum 51 having a plurality of permeation holes 52 formed on the circumferential surface thereof is disposed, and the rotating drum 51 Is rotationally driven by the drum drive motor 55. By opening the door 54 installed on the front side of the washing machine housing 57 so as to be openable and closed, the laundry is discharged from the inside of the rotating drum 51 through the front opening of the water tank 53 and the front opening of the rotary drum 51. You can put in and take out.

When the door 54 is opened and laundry is put into the rotating drum 51, and detergent is added to start operation, water is supplied into the water tank 53, and the water supplied is connected to the perforation hole 52. It passes through and penetrates into the rotating drum 51. When the rotary drum 51 is driven to rotate at a predetermined rotational speed by the drum drive motor 55, the laundry accommodated in the rotary drum 51 is caught by the stirring protrusion 56 provided on the inner circumferential surface of the rotary drum 51 in the rotational direction. Since it is lifted up and falls from an appropriate height, the washing | cleaning action is added to laundry and washing is performed. After this washing step, the dirty washing water is drained, a rinsing step is carried out using the freshly watered water, and when the rinsing step is completed, a dewatering step of rotating the rotating drum 51 at high speed is performed. Each of these processes is automatically executed based on a predetermined control sequence.

Since the drum type washing machine is a general configuration, in order to improve the cleaning performance, the drum type washing machine is pumped up with water supplied in the water tank and supplied to the rotating drum to increase the washing power by sufficiently supplying water to the laundry (Patent Document 1). And drum-type laundry dryers having a function of drying a laundry by supplying warm air into a rotating drum.

  (Patent Document 1) Japanese Patent Laid-Open No. 1997-215893 (3 to 5 pages, Fig. 1)

A washing machine including a drum type washing machine has a demand for improving high cleaning performance, reducing water to be used, and shortening washing time.As an effective means, washing power is applied by using a detergent foam bubbled with a detergent liquid in which detergent is dissolved in water. Techniques for improving are known.

An object of the present invention is to provide a drum type washing machine having a structure for efficiently generating detergent bubbles when applying washing with detergent foam to a drum type washing machine.                         

The present invention for achieving the above object is accommodated in the rotary drum driven by the drum drive motor in the water tank made of the water supply from the water supply means, the water supply means according to the order of each step of the washing step, rinsing step, dehydration step and A drum type washing machine comprising control means for controlling the operation of each part including a drum drive motor, wherein the turbulence generating means is formed on the inner surface side of the water tank in a direction crossing the rotational direction of the rotating drum, At the start of washing with detergent added, the control means controls the water supply means to supply water to a second predetermined water level lower than the first predetermined water level required for the washing process in the tank, and the motor to control the washing of the rotating drum. Rotation which rotates for a predetermined time at a 2nd predetermined rotation speed faster than a 1st predetermined rotation speed in a process Characterized in that the control operation.

In the drum type washing machine having the above-described configuration, water supply control is performed so that water is supplied to the second predetermined water level in the water tank at the start of washing, and rotation control is performed to rotate the rotating drum at the second predetermined rotational speed. The water containing generates water flow in the direction of rotation of the rotating drum. Water flow generates turbulence by the wall surface formed in the direction intersecting with the rotational direction of the rotating drum.Because the water in the tank contains detergent in a small amount of water supply, bubbles are generated in a high concentration, so bubbles are generated. It enters into a rotating drum through the opening part of a rotating drum from inside a water tank, and it attaches to every corner to the laundry which is stirred by rotation of a rotating drum. Since laundry detergents with a high concentration of detergent liquid penetrate into the detergent and high washing power, the washing performance is improved in the washing operation supplied to the first predetermined water level, and the washing time is shortened. can do.

In the above configuration, the control means preferably controls the rotary drum to rotate at the first predetermined rotational speed simultaneously with water supply, and the laundry is lifted in the rotational direction by the rotary drum rotating at the first predetermined rotational speed, The behavior of falling from a height position where the self weight is greater than the rotational inertia or centrifugal force is repeated, and this is carried out at the same time as water supply, so that all laundry becomes wet with water to every corner, and when the foam of high concentration detergent liquid adheres The permeability of is good, and washing without washing imbalance can be performed.

Further, the first predetermined water level is a level corresponding to the amount of laundry put into the rotating drum, and when the rotating drum is rotated by the water supply amount up to the second predetermined level lower than that, the foaming operation is performed in a state where the detergent concentration is high. This is performed, and foaming of a high concentration detergent liquid can be produced efficiently.

Further, the second predetermined rotational speed is a rotational speed at which centrifugal force at which the laundry adheres to the inner circumferential wall of the rotating drum is generated, thereby generating a rapid flow of water in the water supplied to the tank due to the rapid rotational speed of the rotating drum, and thus a high concentration of detergent solution. Of bubbles can be generated efficiently. In addition, since the laundry adheres to the circumferential wall of the rotating drum, the detergent bubbles generated easily fill the empty space in the center.

Further, the first predetermined rotational speed is a rotational speed such that the laundry contacting the inner circumferential surface of the rotating drum is lifted upward by the rotation of the rotating drum, so that the laundry falls downwardly from a height position where the weight is greater than the rotational inertia or centrifugal force. It is preferable to set it as this, and since it is stirred so that the position of a laundry may change, the washing power is applied to all the laundry to every corner.

In addition, the turbulence generating means is preferably formed as a groove formed in the lower portion of the inner surface of the tank in a direction intersecting with the rotational direction of the rotating drum, and can use the side wall of the drain groove formed at the bottom of the tank to drain the water in the tank. have.

In addition, the turbulence generating means may be formed as a protrusion formed at the lower portion of the inner surface of the tank in the direction intersecting with the rotational direction of the rotating drum, thereby effectively generating turbulence in the water flow generated by the rotation of the rotating drum, thereby efficiently generating detergent bubbles. You can.

Fig. 1 shows the main part configuration of the drum type washing machine according to the embodiment, in which the water tank 3 is supported in an obliquely inclined state by a suspension structure (not shown) in the washing machine housing body 2. The rotating drum 5 formed in the cylindrical shape with a bottom is rotatably supported. The rotary drum 5 is rotatably driven by the drum drive motor 4 mounted on the rear surface of the water tank 3 so that the rotation speed can be changed and the rotation direction can be switched. In addition, the rotary drum 5 is inclined so as to be inclined downward from the horizontal direction H toward the rear side from the front side to the bottom surface as the rotation axis direction R is opened. Therefore, when the door body 8 provided to be opened and closed on the inclined surface 2a formed on the front side of the washing machine housing body 2 is opened, the waist is bent when the laundry for the rotating drum 5 is put in and removed. Since the degree is minimal and there is no need to secure a space with sufficient space on the front side of the drum type washing machine 1, the drum type washing machine 1 can be configured to be installed in a narrow space such as a bathroom.

In the washing machine housing 2, in addition to the components described above, a water supply unit 6 for supplying water to the water tank 3, a drain unit 7 for draining water in the water tank 3 to the outside, and washing The control device 10 (refer FIG. 2) which controls the operation | movement from a process to a rinsing process and a dehydration process is arrange | positioned, the said door 8 is opened, the laundry is put into the rotating drum 5, and a water supply part By executing the washing start operation by inputting the required amount of detergent through the detergent inlet provided in (6), the control device 10 controls the series of processes to automatically drive the drum type washing machine 1.

FIG. 2 shows a configuration of the control device 10. The control unit 11 configured by the microcomputer enters the storage unit 15 in accordance with a setting input such as selection of a driving course input from the setting unit 13 or the like. The control command is output to the power switching unit 12 using the stored control program. The power switching unit 12 is configured using a switching element such as an SCR, and turns on the drum drive motor 4, the water feed valve 26, the drain pump 27, etc. according to a control command output from the control unit 11. Control on / off. The control operation of the drum type washing machine 1 by the control device 10 will be described below with reference to FIGS. 1 to 4.

The door 8 is opened, laundry is put into the rotary drum 5, a required amount of detergent is put into the detergent inlet, the power switch 18 is turned on, and the washing machine housing 2 is installed on the surface. By selecting and inputting the driving course according to the type of laundry from the setting unit 13 on the operation panel, the control unit 11 reads from the storage unit 15 a control program corresponding to the setting input. The control operation according to the control sequence is started. First, the control unit 11 rotates the rotary drum 5 to detect the amount of laundry. Since the quantity detection unit 16 detects the amount of the laundry from the load change received by the drum drive motor 4 according to the amount of the laundry, the detected amount of laundry is inputted to the control unit 11 and stored in the storage unit 15. Remembered).

First, the washing process starts, and in the washing process, water supply control and rotation control of the rotary drum 5 as shown in FIG. 3 are performed. In addition, the numbers W1 and W2 shown in FIG. Is a sequence of feedwater control, R1, R2... Is a step number indicating the procedure of the rotation control, which corresponds to the number additionally indicated in the text.

First, the control unit 11 outputs a control command for opening the water supply valve 26 to feed the water in the water tank 3 to the power switching unit 12, and simultaneously rotating the rotary drum 5 at a first predetermined rotational speed. The driving control command is output to the power switching unit 12. By this control operation, the water supply valve 26 is opened, the tap water is supplied from the water supply pipe connected to the water supply section 6, and the water mixed with the detergent is supplied to the water tank 3 (W1). In parallel with this water supply, the drum driving motor 4 rotates the rotating drum 5 at the first predetermined rotational speed (R1), and the rotational direction is reversed in the forward and reverse directions with the predetermined inversion cycle (R2). .

When the laundry contained in the rotary drum 5 is lifted in the rotational direction by the rotation of the rotary drum 5, the first predetermined rotational speed is moved to a height position where the weight is greater than the inertia or centrifugal force accompanying the rotation. It is a rotation speed which shows the behavior which falls on the lower inner peripheral surface of the rotating drum 5. The first predetermined rotational speed is a rotational speed of about 35 ± 5r / min when the diameter of the rotary drum 5 is about 500 ± 50mm, and by rotating control of the drum drive motor 4 to achieve this rotational speed, The behavior of the laundry as can be obtained.

On the inner circumferential surface of the rotary drum 5, a stirring projection 9 is provided at a plurality of positions. When the rotating drum 5 rotates at a first predetermined speed, the stirring projection 9 is in contact with the inner circumferential surface of the rotary drum 5. Hang the laundry and lift it in the direction of rotation. Since the laundry falls when the weight is lifted up to a height position where the inertia or centrifugal force with the rotation increases, the laundry deposited in the rotary drum 5 is also lifted up and moved to fall from above, so that the deposited state is dismantled. At the same time, the washing action is given to the laundry by the impact of falling. At the rotational speed slower than the first predetermined rotational speed, the action of lifting the laundry does not occur. On the contrary, since the centrifugal force is increased at the rotational speed faster than the first predetermined rotational speed, the laundry does not fall to the inner circumferential surface of the rotating drum 5. It is in a state.

Since the water supply is continued in the water tank 3 in parallel with the rotational drive of the rotary drum 5, the water supplied in the water tank 3 is discharged from the permeation holes 17 formed in the circumferential surface of the rotary drum 5. It also penetrates into the rotating drum 5. Therefore, the laundry which is picked up by the rotating drum 5 which rotates by the 1st predetermined rotational speed, and the falling behavior repeats is wetted with water to every corner when it falls.

When the water level in the water supply tank 3 is detected by the water level detection unit 19 installed in the water tank 3, and the water level becomes a second predetermined water level lower than the first predetermined water level, which is the water level corresponding to the amount of laundry ( W2), since the water level detection unit 19 inputs the detection output to the control unit 11, the control unit 11 outputs a control command to the power switching unit 12 to close the water supply valve 26 to stop water supply. Is stopped (W3).

When water is supplied to the second predetermined water level in the water tank 3, the control unit 11 outputs a control command for rotationally driving the rotary drum 5 at the second predetermined rotational speed to the drum drive motor 4, thereby rotating the drum. (5) is rotationally driven at a second predetermined rotational speed faster than the first predetermined rotational speed (R3). The second predetermined rotational speed is a rotational speed such that the laundry does not fall to the inner circumferential surface of the rotating drum 5 due to the centrifugal force accompanying the rotation of the rotating drum 5, and the diameter of the rotating drum 5 is 500 ± 50 mm. The rotation speed is about 90 to 140 r / min. By rotating the rotary drum 5 at this second predetermined rotational speed, the detergent solution of high concentration in which detergent is mixed in a small amount of water is in a state in which water flow is generated by rotation of the rotary drum 5 and bubbles are likely to occur. do.

As shown in FIG. 1 and FIG. 4, the drainage groove 20 is formed in the lowest part of the water tank 3 in the direction orthogonal to the rotation direction (arrow A direction) of the rotating drum 5, and the drainage groove 20 Since the side wall (wall portion or turbulence generating means) 20a of the cross-section crosses the water flow direction (arrow B direction), turbulence (arrow C) is generated in the water flow by the side wall 20a, and detergent is mixed at a high concentration. The washed water is in a state where bubbles are generated by turbulence.

Generally, detergent molecules are composed of hydrophilic group and lipophilic group. In detergent solution dissolved in water, latent molecules are aligned at the interface (water surface), and detergent molecules which are not completely arranged are individually placed in water. Or as a meschel (population). When the detergent molecules at the interface are removed, the detergent molecules in the water immediately move to the interface and replenish. When bubbles generated by turbulent flow are sent to the detergent liquid, the bubbles rise to reach the interface, and detergent bubbles of a form in which the detergent molecules aligned at the interface are kept in the film of the foam as they are are generated. Since this detergent foam arranges as many detergent molecules as possible, the detergent concentration is also high. Since the detergent molecules in the liquid move to the replenishment of the detergent molecules taken as the detergent bubbles, the detergent bubbles are sequentially formed when bubbles are sent in sequence.

The detergent foam generated in a large amount fills and rises between the water tank 3 and the rotary drum 5, and infiltrates into the rotary drum 5 sequentially from the open front side opening 3a and adheres to the laundry. Laundry is attached to the inner circumferential surface of the rotating drum 5 rotating at the second predetermined rotational speed, and detergent foam easily penetrates into the empty space at the center of the rotating drum 5, and the detergent foam enters the laundry through the permeation hole 17. Since this is also a penetrating state, detergent foam adheres to the laundry. The laundry is wetted with water to every corner by the action of the rotational drum 5 being rotated at the first predetermined rotational speed. When the detergent foam adheres to the laundry, the detergent component easily penetrates into the laundry. .

Penetration of detergent foam into the surface or inside of dirty laundry results in the lipophilic group being taken away by grease and particle contamination attached to the oil. In addition, when the detergent foam becomes foam when passing through the laundry, a high concentration of detergent liquid is infiltrated into the laundry, and the time is easily removed. Thus, washing of the laundry by the detergent foam becomes possible. Thus, by adhering the detergent liquid to the laundry in the rotary drum 5 by making it into a bulky detergent foam, the detergent component easily acts on the contamination, and the detergent concentration of high concentration is easily penetrated, so that the washing imbalance is suppressed and the cleaning power is suppressed. This improvement and the washing time can be shortened.

After the first predetermined time elapses in which the detergent foam generated in a sufficient amount enters the rotating drum 5 and the laundry is in the state of detergent foam (R4), the control unit 11 opens the water supply valve 26 to Since a control command for supplying water into the water tank 3 is output to the power switching unit 12, the water supply valve 26 is opened to start supply water supply (W4). Since the water level in the water supply tank 3 is detected by the water level detection unit 19, and when the first predetermined water level is detected (W5), the water level detection unit 19 outputs the detection output to the control unit 11. The water supply valve 26 is closed by the control command from (11), and the water supply is stopped (W6).

The first predetermined water level is a water supply amount corresponding to the amount of the laundry, and as described above, the amount of the laundry is first detected by the quantity detecting unit 16, and the amount of the laundry detected is stored in the storage unit 15. Water supply is stopped when the 1st predetermined water level which becomes a corresponding water supply amount is detected.

Since the control unit 11 outputs a control command for rotating the rotary drum 5 at the first predetermined speed to the power switching unit 12 in accordance with the start of the replenishment water supply to supply the water until the first predetermined water level is reached. The rotation of the rotating drum 5 at the first predetermined rotational speed by the drum drive motor 4 is set (R5), and is inverted and driven in the forward and reverse directions at a predetermined inversion cycle (R6). By rotating the rotary drum 5 at a first predetermined rotational speed, the washing action is added to the laundry by lifting and dropping, and the rotational direction is changed in the forward and reverse directions at predetermined time intervals, thereby washing the laundry full of detergent foam. Detergent bubbles adhere to every corner of the contaminants, and the washing operation is performed over a second predetermined time by washing water having a first predetermined water level corresponding to the amount of laundry supplied and supplied (R7). When the second predetermined time elapses, the control unit 11 outputs a control command to stop the rotation of the drum drive motor 4 to the power switching unit 12, so that the rotation of the rotating drum 5 is stopped (R8). ), The washing process is completed.

After the end of the washing process, the rinsing process and the dehydration process are carried out to complete the whole process. Since the rinsing step and the dehydration step can be performed in the same manner as in the prior art, the description thereof is omitted.

In the above-described control procedure, the control operation of rotating the rotary drum 5 at the first predetermined rotational speed until water is supplied to the second predetermined water level may be omitted, but water cannot be introduced into the laundry in advance. The ability to penetrate the laundry foam into the laundry is reduced.

In addition, although the side wall 20a of the drain groove 20 is used to impart turbulence to the water flow in order to efficiently generate detergent bubbles, as shown in FIG. 5, a rotating drum is provided at the inner bottom portion of the water tank 3. The protrusions 28 may be formed to intersect in the rotational direction of (5). The protrusions 28 can generate large turbulence due to the water flow, which can produce detergent bubbles more efficiently. In addition, even in the structure of the water tank 3 which does not provide the drainage groove 20 especially, detergent foam can be produced | generated by the turbulence generate | occur | produced by the projection part 28. As shown in FIG.

In addition, although the structure which tilted the rotating drum 5 was shown in the said Example, even when the rotating drum 5 is arrange | positioned in the horizontal direction, the same washing | cleaning effect is changed by changing the rotational speed of the rotating drum 5. You can get it.

According to the present invention, foaming of detergent liquid can be efficiently generated by using turbulence generating means installed in the tank by the water supply control in the tank and the rotation control of the rotating drum. The washing process with less washing imbalance can be carried out efficiently. Therefore, it is possible to provide a drum type washing machine that shortens the washing time and reduces the running cost.

Claims (8)

Operation of each part including the water supply means and the drum drive motor in accordance with the order of the washing process, the rinsing process, the dehydration process in the rotary drum is driven by the drum drive motor in the water tank from the water supply means In the drum type washing machine comprising a control means for controlling the, While forming turbulence generating means in a direction intersecting with the rotational direction of the rotary drum below the inner surface of the water tank, the control means controls the water supply means at the start of washing so that the first predetermined water level required for the washing process in the water tank. After performing a water supply control operation of supplying water to a lower second predetermined water level, the drum driving motor is controlled to rotate the rotating drum at a second predetermined rotation speed which is faster than the first predetermined rotation speed in the washing step for a predetermined time. Characterized by executing a control operation Drum Washing Machine. The method of claim 1, The control means, in addition to the water supply control operation, controls rotation of the rotating drum at a first predetermined rotational speed simultaneously with water supply. Drum Washing Machine. The method according to claim 1 or 2, The first predetermined level is a level corresponding to the amount of laundry put into the rotating drum. Drum Washing Machine. The method of claim 1, The second predetermined rotational speed is a rotational speed at which the centrifugal force of the degree that the laundry adheres to the inner circumferential wall without falling of the laundry from the inner circumferential wall of the rotating drum is obtained. Drum Washing Machine. The method of claim 2, The first predetermined rotational speed is a rotational speed such that the laundry lifted upward by the rotation of the rotary drum falls downwardly from a height position where its own weight becomes larger than the centrifugal force. Drum Washing Machine. The method of claim 1, The turbulence generating means is a groove formed in the lower portion of the inner surface of the tank Drum Washing Machine. The method of claim 6, The turbulence generating means is a side wall of the drain groove formed at the bottom of the tank Drum Washing Machine. The method of claim 1, The turbulence generating means is a protrusion formed in the lower portion of the inner surface of the tank Drum Washing Machine.

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