KR100407063B1 - Drum washing machine - Google Patents

Abstract

In a drum type washing machine for washing laundry in a drum rotatably arranged around a horizontal axis, when judging an unbalance of laundry, it is possible to judge from the unbalance value that the amount of laundry is small by a different criterion .

The drum is rotatably arranged in a water-receiving vessel resiliently supported in the main body of the washing machine. The drum is driven by a first motor (18) and a second motor (19) The operation of the motor 19 and the like is controlled by the control means 24 to execute the respective steps of washing, rinsing and dewatering. The control means (24) has a step of determining an unbalance of the laundry due to the deflection of the laundry at the start of dewatering, and when the unbalance value reaches the first predetermined value or more at least once, It is.

Description

[0001] DRUM WASHING MACHINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine for washing laundry in a drum rotatably disposed about a horizontal axis.

Conventionally, this type of drum type washing machine is configured as shown in Fig. Hereinafter, the configuration will be described.

As shown in Fig. 9, the drum 1 is provided with a large number of water holes 2 on the outer periphery thereof, and is rotatably disposed in the water tray 3. One end of the horizontal shaft 4 is fixed to the rotation center of the drum 1 and the drum pulley 5 is fixed to the other end of the horizontal shaft 4. [ The motor 6 is connected to the drum pulley 5 by means of a belt 7 to drive the drum 1 to rotate. A door (8) is provided in the opening of the drum (1) so as to be openable and closable.

The water storage tank 3 is attached to the washing machine main body 9 with a spring 10 so that the vibration damper 11 prevents vibration during dewatering from being transmitted to the washing machine body 9, A weight 12 for reducing vibration is provided. The heater (13) heats the washing water in the water receiving tank (3). The drain valve 15 is connected to the water receiving tank 3 by a hose 16 so that the laundry in the water receiving tank 3 can be drained I will. The control device 17 controls the operation of the motor 6, the heater 13, the water supply valve 14 and the drain pump 15 to gradually control a series of strokes such as washing, rinsing and dehydration.

When the drum 1 is rotated at a low speed by the motor 6, the drum 1 is opened by opening the door 8 to put the laundry into the drum 1, And water is supplied from the water supply valve 14 while continuing this operation. When a predetermined amount of water is supplied, the water supply is stopped and washing is continued, and the laundry in the drum 1 is lifted and dropped on the surface of the water. Thus, the washing process is performed.

The rinsing cycle includes a rinsing cycle and an intermediate dewatering cycle, and performs the same operation as the washing cycle in the rinsing cycle. In the intermediate dewatering cycle before the rinsing cycle, when the deflection, that is, the imbalance, of the laundry in the drum 1 occurs, the drum 1 and the water tray 3 vibrate so that the rotational speed of the drum 1 is gradually increased, A balance control stroke for uniformly attaching the laundry to the inner surface of the drum 1 is carried out and then an unbalance determination stroke for determining the unbalance of the laundry due to the deflection of the laundry is performed and if the unbalance value is equal to or larger than the predetermined value, Perform a control stroke to correct the imbalance.

If the unbalance value is less than the predetermined value, the drum 1 is rotated at a high speed, and the laundry is centrifugally dewatered. At this time, vibration is reduced by the vibration damper 11 to make it difficult for vibration to be transmitted to the washer main body 9. When the number of unbalance correction reaches a predetermined number of times, the intermediate rinse cycle is not performed and the process proceeds to the next rinsing cycle. In the dewatering stroke, the same operation as in the intermediate dewatering stroke is executed. If the unbalance value is equal to or larger than the predetermined value, the unbalance correction is executed. If the unbalance correction number reaches the predetermined number, it is determined that it can not be started. If the value is below the unbalance value, the laundry is centrifugally dewatered to complete dehydration.

In this conventional structure, when a small amount of laundry is dewatered, there is no amount of laundry to adhere over the entire inner surface of the drum 1, so even if the balance control stroke is executed, As a result, the unbalance value generated by the small amount of laundry is equal to or larger than the predetermined value, and even if the predetermined number of balance control strokes are executed, the unbalance value can not be made lower than the predetermined value, There is a problem that the dehydration start can not be started by the dehydration.

A first object of the present invention is to make it possible to judge that the amount of laundry is small based on a different criterion from an unbalance value when judging the unbalance of the laundry.

A second object of the present invention is to enable dehydration start even if there is an imbalance due to a small amount of laundry when the amount of laundry is determined to be small, so that the laundry can proceed without any trouble.

In order to achieve the first object of the present invention, there is provided a washing machine, comprising: a drum; a drum mounted on the drum; a drum rotatably disposed in the drum; a motor driven by the drum; Washing, rinsing and dewatering are controlled. The control means is provided with a step of determining an unbalance of the laundry due to the deflection of the laundry at the start of dewatering, and when the unbalance value reaches the first predetermined value or more at least once, the amount of laundry is determined to be small.

Accordingly, when judging the unbalance of the laundry, it is possible to judge that the amount of the laundry is a small amount based on the other determination criterion from the unbalance value.

Further, in order to achieve the second object, the control means changes the predetermined value for judging the unbalance when the amount of the laundry is judged as a small amount from the unbalance value.

Accordingly, when the amount of the laundry is small, it is not judged that there is an imbalance even if there is an imbalance due to a small amount of laundry, so that dehydration can be started and the washing can proceed without any trouble.

The invention according to claim 1 of the present invention is a washing machine comprising: a water-receiving vessel elastically supported in a main body of a washing machine; a drum rotatably arranged in the water-receiving vessel; a motor for driving the drum; And a control unit that executes each cycle of washing, rinsing, and dehydration, wherein the control unit has a step of determining an unbalance of the laundry due to the deflection of the laundry at the start of dewatering, The amount of laundry can be judged to be a small amount based on a different criterion from the unbalance value in the process of judging the unbalance of the laundry, It is possible to precisely determine that the amount of the laundry is small, without providing a stroke.

According to a second aspect of the present invention, there is provided a washing machine comprising: a water storage tank elastically supported in a washing machine main body; a drum rotatably arranged in the water storage tank; a motor driving the drum; And a control unit that executes each cycle of dehydration, wherein the control unit has a step of determining an unbalance of the laundry due to the deflection of the laundry at the start of dehydration, and when the unbalance value reaches the second predetermined value or more The amount of laundry is determined to be a small amount when the number of imbalance correction to be performed when the amount of imbalance correction to be performed reaches a predetermined number. When the amount of laundry is small, even if the imbalance correction is performed, At this time, it is possible to judge that the amount of the laundry is small by the number of times that the imbalance of the laundry is corrected, and the amount of the laundry is small It can be precisely determined.

According to a third aspect of the present invention, there is provided a washing machine comprising: a water-receiving vessel elastically supported in a washing machine main body; a drum rotatably arranged in the water-receiving vessel; a motor driving the drum; Wherein the control means includes a step of determining an unbalance of the laundry due to the deflection of the laundry at the start of dewatering, and the unbalance value is at least once a first predetermined value or more And the amount of laundry is determined to be small when the number of imbalance correction performed when the unbalance value reaches the second predetermined value or more reaches a predetermined number of times. It is therefore possible to accurately determine that the amount of laundry is small have.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the control means changes the predetermined value for judging the unbalance when the amount of the laundry is determined from the unbalanced value as a small amount, It is possible to start the dehydration and to advance the process without hindrance because the imbalance is not judged even if there is an imbalance due to a small amount of laundry.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, when the amount of the laundry is determined from the unbalanced value as a small amount, the control means changes the second drum rotation speed in the intermediate dewatering and dewatering stages By changing the number of revolutions of the drum in the intermediate dewatering and dewatering stages, the resonance point of the vibrations coming from the structure and the bottom can be avoided, and the swinging of the main body of the washing machine can be reduced.

According to a sixth aspect of the present invention, in the invention according to the fourth aspect, when the amount of the laundry is judged to be small from the unbalance value, the control means controls the rotation And the imbalance determination is made again. As a result, the water from the laundry is removed, the deflection of the laundry is reduced, and the probability of starting with the first drum rotational speed can be increased.

According to a seventh aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, when the amount of the laundry is judged to be small from the unbalance value, the intermediate dewatering step thereafter is omitted, It is possible to shorten the time for the imbalance correction to be performed and the time for the intermediate dehydration.

According to the eighth aspect of the present invention, in the invention according to the seventh aspect, the control means changes the operation time of the rinsing when the amount of the laundry is judged to be a small amount from the unbalance value, and the rinsing The rate of reduction can be compensated.

According to a ninth aspect of the present invention, in the invention according to the seventh aspect, the control means changes the level of the rinsing when the amount of the laundry is determined from the unbalanced value as a small amount, and the rinsing rate Can be compensated for.

According to a tenth aspect of the present invention, in the invention according to the seventh aspect, the control means changes the operation time and the water level of the rinsing when the amount of the laundry is judged to be small from the unbalance value. Can be compensated for.

1 is a block circuit diagram of a drum type washing machine according to a first embodiment of the present invention,

2 is a sectional view of the drum type washing machine of the first embodiment of the present invention,

3 is a rear view of a part of the drum type washing machine of the first embodiment of the present invention,

FIG. 4 is a flowchart of the operation of the drum type washing machine of the first embodiment of the present invention,

5 is a flowchart showing the operation of the drum type washing machine according to the second embodiment of the present invention,

6 is a flowchart showing the operation of the drum type washing machine according to the third embodiment of the present invention,

7 is a flowchart of the operation of the drum type washing machine of the fourth embodiment of the present invention,

8 is a flowchart of the operation of the drum type washing machine of the fifth embodiment of the present invention,

9 is a sectional view of a conventional drum type washing machine.

DESCRIPTION OF THE REFERENCE NUMERALS

1: Drum 3: Water tray

9: Washing machine main body 18: First motor (motor)

19: second motor (motor) 24: control means

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and a description thereof will be omitted.

Example 1

As shown in Figs. 1 to 3, the first motor (motor) 18 rotates the drum 1 at a low speed N1 (for example, 53 r / min) to perform washing or rinsing, 2 motor (motor) 19 rotates the drum 1 at a high speed N2 (for example, 1000 r / min) to dewater. The first motor 18 and the second motor 19 are constituted by induction motors and are connected to the driven pulley 22 via belts 20 and 21 respectively.

The driven pulley 22 has two kinds of reduction ratios and connects the first motor 18 to the driven pulley 22a having a large reduction ratio via the belt 20 and the second motor 19 to the belt 21 And is fixed to the other end of the horizontal shaft 4 fixed at one end thereof to the center of rotation of the drum 1. The other end of the horizontal shaft 4 is connected to the driven pulley 22b.

2 controls the heater 13, the water supply valve 14, the drain pump 15, the first motor 18, the second motor 19, and the like. The control device 23 shown in Fig. . The control means 24 includes a heater 13, a water supply valve 14, a drain pump 15, a first motor (not shown), and a second motor (not shown) via a power switching means 25 constituted by a microcomputer and composed of a bidirectional thyristor or the like. The first motor 18, the second motor 19, and the like to gradually control a series of strokes of washing, rinsing, and dewatering.

The input setting means 26 is inputted to the control means 24 by inputting a necessary set course and start of the operation or the like by the user. The display means 27 displays setting contents, operating conditions, and the like by the input setting means 26. [ The water level detecting means 28 detects the water level in the water receiving tank 3 and is input to the control means 24. [

The water level detecting means 28 is connected to the water receiving tank 3 so that a magnetic body (not shown) is fixedly mounted on the diaphragm operated by the pressure according to the water level in the water receiving tank 3, The oscillating circuit is formed by using this coil. The positional relationship between the magnetic body and the coil is changed by the movement of the diaphragm by the pressure in accordance with the water level in the water catch tank 3 , The inductance of the coil is changed, and the change in the oscillation frequency of the oscillation circuit is detected to detect the water level in the water storage tank (3).

The water temperature detection means 29 detects the water temperature in the water storage tank 3 and is input to the control means 24. The rotation number detecting means 30 is incorporated in the first motor 18 to detect the number of revolutions of the drum 1 by detecting the number of revolutions and is input to the control means 24. [ The storage means 31 stores data and the like necessary for a series of controls. The signal sending means 32 generates a signal sound in accordance with the signal of the control means 24. [ Reference numeral 33 denotes a commercial power supply, and reference numeral 34 denotes a power switch.

The control means 24 has a step of determining the unbalance of the laundry due to the deflection of the laundry at the start of dewatering, and the unbalance value is at least once a first predetermined value (the number of revolutions of the drum 1 is 13 r / Or more, the amount of laundry is judged to be small. When the amount of laundry is judged to be small, the intermediate dewatering steps thereafter are omitted. Further, when the amount of the laundry is judged as a small amount from the unbalance value, the control means 24 changes the predetermined value for judging the unbalance by the subsequent stroke.

The first motor 18 rotates the drum 1 from the low speed N1 (53 r / min), and the laundry is conveyed from the drum 1 to the drum 1. In this case, (For example, 100 r / min) attached to the inner surface of the drum 1 so as to uniformly adhere the laundry to the inner surface of the drum 1. Then, (100 r / min), and when the conduction angle of the power switching means (25) is fixed by the conduction angle, the fluctuation of the total number of revolutions of the drum (1) The unbalance of the laundry is determined from the point of correlation.

The operation will be described with reference to Fig. Steps 50 to 52 are intermediate dewatering stages of the rinsing cycle 1 performed in step 53. In step 50 the control means 24 operates the first motor 18 to rotate the drum 1 So that the laundry can be uniformly adhered to the drum 1. [0050] As shown in Fig. Next, it is judged that there is no problem due to the unbalance of the laundry even if the rotation speed variation of the drum 1 due to the deflection of the laundry attached at the step 51 is 3 r / min or less, The second motor 19 is operated by the motor 52 to perform dehydration for a predetermined period of time, thereby completing the dehydration. Next, in step 53, rinsing is performed in which the water supply valve 14 is operated while the drum 1 is rotated.

Next, if the variation in the number of revolutions of the drum 1 is not less than 3r / min in step 51, the process proceeds to step 54. If the variation in the number of revolutions of the drum 1 in step 54 is 13r / The amount of laundry is judged to be a small amount (referred to as a small amount detection) at step S55, and the process proceeds to step S53. If the variation in the number of revolutions of the drum 1 is equal to or smaller than 13 r / min in step 54, the process proceeds to step 56 to execute the imbalance correction in which the drum 1 is stopped and the balance control is executed again from the beginning. The imbalance correction is performed until a predetermined number of times (for example, six times). If the predetermined number of times is exceeded, the process proceeds to step 53.

After executing the rinsing in step 53, the control means 24 in step 57 skips the intermediate dewatering step in steps 58 to 60 when performing the small amount detection in step 55, The routine proceeds to the rinsing stage 2 of the rinsing stage 61. When the small amount is not detected, the same operation as that of the rinsing stage 1 is executed as in steps 58 to 60 and steps 62 to 64. [

When there is a small amount of detection by the rinsing cycle in steps S65 to S68, the balance control is terminated in step S65, and then a predetermined value for determining an unbalance in step S71, (For example, 10 r / min), the dehydration is executed in step 68 and the process is terminated.

If there is no small amount of detection, the imbalance is determined in step 67, and if the variation in the number of revolutions is 3 r / min or less, the final dehydration is executed and the process is terminated. If the variation in the number of revolutions is not less than 3r / min, the process proceeds to step 69. If the variation in the number of revolutions of the drum 1 is not less than 13r / min in step 69, the amount of laundry is determined to be small in step 70 , The process proceeds to step S71.

If the variation in the number of revolutions of the drum 1 is less than or equal to 13r / min in step 69, the process proceeds to step 72 to execute the imbalance correction to stop the drum 1 and execute the balance control again from the beginning. The imbalance correction is executed up to the predetermined number of times (six times). If the predetermined number of times is exceeded, the process proceeds to step S73, and an abnormal signal is sent to notify the user.

As described above, according to the present embodiment, the control means 24 has a stroke for judging the unbalance of the laundry due to the deflection of the laundry at the start of dewatering, and when the unbalance value reaches the first predetermined value or more at least once, It is possible to determine that the amount of the laundry is small based on the other determination criterion from the unbalance value in the process of determining the unbalance of the laundry, It is possible to accurately determine that the amount of laundry is small.

When the amount of the laundry is judged to be small, the intermediate dewatering step thereafter is omitted. Therefore, it is possible to shorten the time for the imbalance correction to be performed by determining that the laundry is unbalanced in the intermediate dewatering stroke, can do. In addition, when a small amount of laundry is determined from the unbalance value, a predetermined value for determining the unbalance is changed. Therefore, when the amount of laundry is small, even if there is an unbalance due to a small amount of laundry, It is possible to start the dehydration from the point and proceed the administration without hindrance.

Example 2

The control means 24 in Fig. 1 is provided with a stroke for judging the unbalance of the laundry due to the deflection of the laundry at the start of dewatering. When the unbalance value is smaller than the second predetermined value (the rotational speed fluctuation of the drum 1 is 3r / Minute), the amount of laundry is judged to be a small amount when the number of imbalance correction to be performed reaches a predetermined number of times (for example, six times). Further, when the amount of laundry is judged to be small, the operation time of the rinsing is changed. Other configurations are the same as in the first embodiment.

The operation will be described with reference to Fig. Steps 74 to 76 are intermediate dewatering stages of the rinsing cycle 1 performed in step 77. In step 74 the control means 24 operates the first motor 18 to rotate the drum 1 So that the laundry can be uniformly adhered to the drum 1. [0050] As shown in Fig. Next, when the variation in the number of revolutions of the drum 1 due to the deflection of the laundry attached in step 75 is 3 r / min or less, the second motor 19 is operated in step 76, And terminates. Next, in step 77, rinsing is performed in which the water supply valve 14 is operated while the drum 1 is rotated.

Next, if the variation in the number of revolutions of the drum 1 is not less than 3r / min in the step S75, the routine proceeds to a step S78, where the drum 1 is stopped and the imbalance correction for executing the balance control again from the beginning is executed . The imbalance correction is executed until the predetermined number of times (six times). If the predetermined number of times is exceeded, the process proceeds to step 79 to determine the amount of laundry to be a small amount (small amount detection), and the rinsing time is changed to 4 minutes in step 80 to perform rinsing. This is because, as described later, when the intermediate dehydration is skipped, the rinsing rate becomes poor, so that the rinsing time is compensated for by changing the rinsing time.

The control means 24 skips the intermediate dewatering stages of the steps 82 and 83 and proceeds to the rinsing stage 2 of the stage 85 in the case where the control means 24 first performs the small amount detection by the previous rinsing stage 1 And if the small amount detection is not executed, the same operation as that of the rinsing step 1 is executed as in steps 82 to 84 and steps 86 to 88.

In steps 89 to 97, when there is a small amount of detection by the rinsing cycle as a final dehydration cycle, after completion of the balance control in step 89, a predetermined value for determining an unbalance in step 95, (For example, 10 r / min), and if it is 10 r / min or less, dehydration is executed in step 92 and the process is terminated.

If there is no small amount of detection, the imbalance is determined in step 91, and if the variation in the number of revolutions is 3 r / min or less, the final dehydration is executed and the process is terminated. If the variation in the number of revolutions is 3 r / min or more, the process proceeds to step 93 to perform the imbalance correction until the predetermined number of times (six times). If the predetermined number of times is exceeded, the process proceeds to step 94 to determine the amount of laundry to be a small amount (small amount detection) and proceeds to step 95. [

If the variation in the number of revolutions of the drum 1 is less than or equal to 10 r / min in step 95, dehydration is performed in step 92 as described above and the process is terminated. If the variation in the number of revolutions of the drum 1 is 10 r / min or more, the process proceeds to step 96, and the imbalance correction is performed until the predetermined number of times (six times). If the predetermined number of times is exceeded, the flow advances to step 97 to send an abnormal signal to inform the user.

As described above, according to the present embodiment, the control means 24 has a stroke for determining the unbalance of the laundry due to the deflection of the laundry at the start of dewatering, and the unbalance value is set to a second predetermined value The amount of the laundry is judged to be small when the number of imbalance correction to be performed when the number of imbalances to be corrected reaches a predetermined number (6 times) or more. Therefore, By judging that the amount is small, it is possible to accurately determine that the amount of laundry is small.

Further, when it is determined that the amount of the laundry is small, the operation time of the rinsing is changed, so that the reduction in the rinsing rate when the intermediate dehydration is omitted can be compensated.

In this embodiment, the rinsing operation time is changed when the amount of the laundry is determined to be small. However, even if the rinsing operation time and the water level are changed, the same operation Effect can be obtained.

Example 3

The control means 24 in Fig. 1 is provided with a stroke for judging the unbalance of the laundry due to the deflection of the laundry at the start of dewatering, and the unbalance value is set at least once to the first predetermined value (13 r / min) or more and the imbalance value reaches a predetermined second value (the number of revolutions of the drum 1 is 3 r / min) or more, 6 times), the amount of laundry is judged to be small. Other configurations are the same as those of the first embodiment or the second embodiment.

The operation will be described with reference to FIG. 6 in the above configuration. Since the operations of steps 74 to 79 and steps 81 to 87 are the same as those of the second embodiment, description thereof will be omitted.

In steps 98 to 101, when a small amount of detection is performed in the rinsing cycle in the final rinsing cycle, the balance control is terminated in step 98, and a predetermined value for determining an unbalance in step 102, (For example, 12 r / min), the amount of laundry is judged to be small in step 104 when the number of revolutions of the drum 1 exceeds 12 r / min.

If there is no small amount of detection, it is determined as unbalance in step 100, and if the variation in the number of revolutions is 3 r / min or less, the final dehydration is executed and the process is terminated. If the variation in the number of revolutions is 3 r / min or more, the process proceeds to step 103. If the variation in the number of revolutions of the drum 1 exceeds 13 r / min, the amount of laundry is determined to be small in step 104, ). (For example, 10 r / min) by raising the predetermined value for judging the unbalance in step 105, that is, the number of revolutions (for example, 10 r / min).

If the variation in the number of revolutions of the drum 1 is less than or equal to 12 r / min in step 102 and the variation in the number of revolutions of the drum 1 is equal to or less than 13 r / min in step 103, ), And implements the imbalance correction to execute the balance control again from the beginning. The imbalance correction is executed up to the predetermined number of times (six times), and if the predetermined number of times is exceeded, the process proceeds to step 107 to send an abnormal signal to notify the user.

As described above, according to the present embodiment, when the unbalance value reaches at least the first predetermined value (the number of revolutions of the drum 1 is 13 r / min or more) and the unbalance value reaches the second predetermined value (the drum 1) The amount of laundry is judged to be a small amount when the number of imbalance correction performed when the number of times of imbalance correction performed when the variation in the number of revolutions of the laundry reaches 3r / It can be judged accurately.

Example 4

The control means 24 in Fig. 1 sets the number of revolutions of the drum 1 to the second number of revolutions (for example, 500 r) in the intermediate dewatering and dewatering steps when the amount of laundry is judged to be small from the unbalance value / Minute). Other configurations are the same as those of the first to third embodiments.

The operation will be described with reference to Fig. 7 in the above configuration. Steps 108 to 115 are operations of a dewatering stroke after detection of a small amount in the rinsing stroke and the control means 24 performs balance control in step 109 and then makes an unbalance determination in step 110 so that the rotation number fluctuation is 3r / Min, the drum 1 is rotated at a high speed N2 (1000 r / min) in step 111 to perform final dewatering and the process is terminated.

If the variation in the number of revolutions is 3 r / min or more, the process proceeds to step 112, and if the variation in the number of revolutions is 10 r / min or less, in step 113, (500 r / min), the vibration of the washing machine main body 9 is reduced.

In step 112, if the variation in the number of revolutions is 10 r / min or more, the process proceeds to step 114 to execute the imbalance correction in which the drum 1 is stopped and the balance control is executed again from the beginning. The imbalance correction is executed up to the predetermined number of times (six times), and if the predetermined number of times is exceeded, the process proceeds to step 115 to send an abnormal signal to notify the user.

As described above, according to the present embodiment, when the amount of the laundry is determined from the unbalanced value to a small amount, the number of rotations of the drum 1 is reduced to the second number of revolutions (for example, 500 r / min Therefore, it is possible to avoid the resonance point of the vibrations coming from the structure and the floor, and the vibration of the washing machine main body can be reduced.

Example 5

When the control means 24 in Fig. 1 judges that the amount of the laundry is small from the unbalance value, the rotation is stopped when the drum reaches the second drum rotation speed (500 r / min) in the intermediate dewatering and dewatering stages , And imbalance determination is again performed. Other configurations are the same as those of the first to fourth embodiments.

The operation will be described with reference to Fig. 8 in the above configuration. In steps 116 to 124, the control means 24 performs balance control in step 117 by the operation of the dewatering stroke after a small amount of detection in the rinsing stroke, and then makes an unbalance determination in step 118, If it is 3 r / min or less, the drum 1 is rotated at a high speed N2 (1000 r / min) in step 119 to final dewatering and the process is terminated.

If the variation in the number of revolutions is 3 r / min or more, the process proceeds to step 120, and if the variation in the number of revolutions is 10 r / min or less, the number of revolutions If the variation in the number of revolutions is 10 r / min or more, the process proceeds to step 123 to perform the balance control of the post-stop step 117 to adjust the imbalance between the steps 118 and 120 And the imbalance correction for executing the determination is executed until the predetermined number of times (six times). If the predetermined number of times is exceeded, the process proceeds to step 124, and an abnormal signal is sent to notify the user.

As described above, according to the present embodiment, when the amount of laundry is determined from the unbalanced value to a small amount, the number of revolutions (500 r / min), which is less than the resonance from the strength of the floor and the strength of the product, For example, the weight difference between the cotton containing a large amount of water and the chemical fiber not containing much water is reduced, so that the imbalance is corrected, and then the imbalance correction is performed a predetermined number of times, ) At a high speed N2 (1000 r / min) to be dewatered, thereby securing a dewatering rate.

As described above, according to the invention as set forth in claim 1 of the present invention, there is provided a washing machine comprising: a water-receiving tank elastically supported in a washing machine main body; a drum rotatably disposed in the water- And control means for controlling the operation to execute each cycle of washing, rinsing, and dewatering, wherein the control means has a stroke for determining an unbalance of the laundry due to deflection of the laundry at the start of dewatering, It is possible to judge that the amount of the laundry is small based on the different criterion from the unbalanced value in the step of judging the unevenness of the laundry because the amount of the laundry is judged to be small when it reaches the first predetermined value or more, It is possible to precisely determine that the amount of laundry is small, without providing a stroke for a small amount of judgment.

According to a second aspect of the present invention, there is provided a drum type washing machine comprising: a water receiving vessel elastically supported in a washing machine main body; a drum rotatably arranged in the water receiving drum; a motor for driving the drum; And a control unit that executes each cycle of washing, rinsing, and dehydration, wherein the control unit has a step of determining an unbalance of the laundry due to the deflection of the laundry at the start of dewatering, The amount of the laundry is determined to be a small amount when the number of imbalance correction to be performed when the number of imbalance correction is reached reaches a predetermined number of times. Therefore, even if the amount of laundry is small, even if the imbalance is corrected, In this case, it is possible to judge that the amount of the laundry is small by the number of times that the imbalance of the laundry is corrected, That the amount is a small amount can be precisely determined.

According to a third aspect of the present invention, there is provided a washing machine comprising: a water-receiving tank elastically supported in a main body of a washing machine; a drum rotatably arranged in the water-receiving tank; a motor for driving the drum; And a control means for executing each step of washing, rinsing and dewatering, wherein said control means has a stroke for determining an unbalance of laundry by deflection of laundry at the start of dewatering, The amount of the laundry is judged to be small when the number of imbalance correction performed when the imbalance value reaches a predetermined value or more and the imbalance value reaches the second predetermined value or more reaches a predetermined number of times, .

According to the invention of claim 4, the control means changes the predetermined value for judging the unbalance when the amount of the laundry is determined from the unbalance value to a small amount. Therefore, when the amount of the laundry is small, Even if there is an imbalance, the imbalance is not judged, so that dehydration can be started, and the stroke can proceed without any trouble.

According to the invention as set forth in claim 5, since the control means changes the second drum rotation speed in the intermediate dewatering and dewatering stages when the amount of the laundry is determined to be a small amount from the unbalance value, By changing the number of revolutions of the drum in the dewatering stroke, resonance points of vibrations coming from the structure and the floor can be avoided, and the swinging of the washing machine main body can be reduced.

According to the sixth aspect of the present invention, when the amount of the laundry is determined from the unbalanced value as a small amount, the control means stops the rotation when the drum reaches the second drum rotational speed in the intermediate dewatering and dewatering stages, It is possible to increase the probability of starting with the first drum rotation speed because the water is released from the laundry and the deflection of the laundry is reduced.

According to the seventh aspect of the present invention, when the amount of laundry is judged to be small from the unbalanced value, the control means omits the intermediate dewatering steps thereafter, so that the laundry is determined to be unbalanced in the intermediate dewatering stroke The time for the imbalance correction and the time for the intermediate dehydration can be shortened.

According to the invention as set forth in claim 8, since the operation time of the rinsing is changed when the amount of laundry is judged to be small from the unbalance value, the control means compensates for the decrease in the rinsing rate when the intermediate dehydration is omitted can do.

According to the invention as set forth in claim 9, since the control means changes the water level of the rinsing when the amount of the laundry is determined from the unbalanced value to a small amount, the lowering of the rinsing rate when the intermediate dehydration is omitted can be compensated have.

According to the invention as set forth in claim 10, since the control means changes the operation time and the water level of the rinsing when the amount of the laundry is judged as a small amount from the unbalance value, it is possible to reduce the rinsing rate when the intermediate dehydration is omitted Can be supplemented.

Claims (10)

A drum for rotating the drum, a motor for driving the drum, and an operation of the motor to control washing, rinsing and dehydration of the drum, Wherein the control means includes a step of measuring an unbalance value of the laundry by detecting a variation in the number of rotations of the drum due to the deflection of the laundry at the start of dewatering, When the amount of laundry reaches the first unbalance value or more, the amount of laundry is judged to be small Drum type washing machine. A drum for rotating the drum, a motor for driving the drum, and an operation of the motor to control washing, rinsing and dehydration of the drum, Wherein the control means includes a step of measuring an unbalanced value of the laundry by detecting a variation in the number of rotations of the drum due to the deflection of the laundry at the start of dewatering, , The amount of laundry is judged to be a small amount when the number of imbalance correction to be performed reaches a predetermined number of times Drum type washing machine. A drum for rotating the drum, a motor for driving the drum, and an operation of the motor to control washing, rinsing and dehydration of the drum, Wherein the control means includes a step of measuring an unbalance value of the laundry by detecting a variation in the number of rotations of the drum due to the deflection of the laundry at the start of dewatering, When the number of imbalance correction performed when the first unbalance value is reached and the unbalance value thus measured reaches a predetermined second unbalance value or more reaches a predetermined number of times, the amount of laundry is determined to be a small amount Drum type washing machine. 4. The method according to any one of claims 1 to 3, The control means changes the predetermined first or second unbalance value when the amount of the laundry is judged as a small amount from the unbalance value Drum type washing machine. 5. The method of claim 4, The control means changes the predetermined first drum rotational speed to a second smaller drum rotational speed in the intermediate dewatering and dewatering strokes when the amount of laundry is judged to be a small amount from the unbalanced value Drum type washing machine. 6. The method of claim 5, The control means stops rotation of the drum when it reaches the changed second drum rotational speed in the intermediate dewatering and dewatering steps when the amount of laundry is judged to be small from the unbalance value, Drum type washing machine. 4. The method according to any one of claims 1 to 3, When the control means judges that the amount of laundry is small based on the unbalanced value, the intermediate dewatering step thereafter is omitted Drum type washing machine. 8. The method of claim 7, The control means changes the operating time of the rinsing when the amount of the laundry is judged to be small from the unbalance value Drum type washing machine. 8. The method of claim 7, The control means changes the level of the rinsing when judging the amount of the laundry to be a small amount from the unbalanced value Drum type washing machine. 8. The method of claim 7, The control means changes the operation time and the water level of the rinsing when judging the amount of the laundry to be a small amount from the unbalanced value Drum type washing machine.