KR19990063390A - Drum Washing Machine - Google Patents

Abstract

In a drum type washing machine for washing laundry in a drum rotatably arranged about a horizontal axis, when determining the imbalance of the laundry, it is possible to determine that the amount of the laundry is a small amount by other judgment criteria from the unbalance value. .

The drum is contained in the drip tray which is elastically supported in the washing machine main body, and the drum is rotatably disposed. The drum is driven by the first motor 18 and the second motor 19, and the first motor 18, the second motor. The operation of the motor 19 or the like is controlled by the control means 24 to execute washing, rinsing, and dehydration steps. 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 dehydration, and when the unbalance value reaches at least once the first predetermined value or more, determine the amount of the laundry in a small amount. It is.

Description

Drum Washing Machine

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 constructed as shown in FIG. The configuration will be described below.

As shown in FIG. 9, the drum 1 arrange | positions many water flow holes 2 in the outer peripheral part in the front surface, and is arrange | positioned rotatably in the drip tank 3. One end of the horizontal shaft 4 is fixed to the center of rotation 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 with the drum pulley 5 by the belt 7, and rotationally drives the drum 1. The door 8 is provided in the opening part of the drum 1 so that opening and closing is possible.

The drip tank 3 is attached to the spring 10 from the washing machine main body 9 and is dust-tightly supported so that the vibration at the time of dehydration is not transmitted to the washing machine main body 9 by the dustproof damper 11, and at the same time Install a weight 12 to reduce vibration. The heater 13 heats the laundry in the drip tank 3. The water supply valve 14 supplies water into the drip tank 3 at the time of washing or rinsing, and the drain pump 15 is connected to the drip tank 3 with a hose 16 to drain the laundry in the drip tank 3. It is to let. The control device 17 controls operations of the motor 6, the heater 13, the water supply valve 14, the drain pump 15, and the like, and gradually controls a series of strokes such as washing, rinsing, and dehydration.

When the operation is explained in the above configuration, the door 8 is opened, laundry is put into the drum 1 to start operation, and when the drum 1 is rotated at a low speed by the motor 6, the drum 1 The laundry inside is lifted and dropped, 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 up and falls on the water surface. In this way, the washing process proceeds.

The rinse stroke includes a rinse stroke and an intermediate dewatering stroke, and the rinse stroke performs the same operations as the washing stroke. In the intermediate dewatering stroke before the rinsing stroke, when the deflection, i.e., imbalance, of the laundry in the drum 1 occurs, the drum 1 and the drip tray 3 vibrate, so that the rotation speed of the drum 1 is gradually increased, A balance control stroke is carried out to uniformly attach the laundry to the inner surface of the drum 1, and then an imbalance determination stroke is performed to determine the imbalance of the laundry due to the deflection of the laundry. Run a control stroke to correct the imbalance.

If the imbalance value is less than or equal to the predetermined value, the drum 1 is rotated at high speed, and the laundry is centrifugally dehydrated. At this time, the vibration is reduced by the vibration damper 11 so that the vibration is difficult to be transmitted to the washing machine body 9. When the number of imbalance corrections reaches a predetermined number of times, the process proceeds to the next rinsing cycle without intermediate dehydration. Also in the dehydration stroke, the same operation as that of the intermediate dewatering stroke is performed. If the imbalance value is equal to or greater than the predetermined value, the imbalance correction is performed. When the number of imbalance corrections reaches the predetermined number, it is determined that the operation cannot be started and an abnormal signal is sent. If it is below an imbalance value, the laundry is centrifugally dehydrated to complete dehydration.

In such a conventional configuration, when dewatering a small amount of laundry, there is no quantity enough to adhere the laundry over the entire surface of the inner surface of the drum 1, so that even if a balance control stroke is executed, the inner surface of the drum 1 is uniform. As a result, an unbalance value generated by a small amount of laundry becomes a predetermined value or more, and even if a predetermined number of times balance control stroke is executed, the imbalance value cannot be made less than or equal to the predetermined value. It had a problem that dehydration start might not be possible.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problem, and its first object is to determine that the amount of laundry is a small amount by other determination criteria from the unbalance value when determining the imbalance of the laundry.

Further, a second object of the present invention is to allow dehydration to start even if there is an imbalance by a small amount of laundry when the amount of laundry is determined to be a small amount, so that the administration can proceed without any problems.

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention includes a drum rotatably disposed in a drip tray that is elastically supported in a washing machine body. The drum is driven by a motor, and the operation of the motor is controlled by a control means. Controlling is performed for each cycle of washing, rinsing and dehydration. The control means is provided with a step for determining the unbalance of the laundry due to the deflection of the laundry at the start of dewatering, and when the unbalance value reaches at least once the first predetermined value or more, the amount of the laundry is determined in a small amount.

Thereby, when determining the unbalance of the laundry, it is possible to determine that the amount of the laundry is a small amount based on other judgment criteria from the unbalance value.

In addition, in order to achieve the second object, the control means changes the predetermined value for determining the imbalance when the amount of the laundry is determined in a small amount from the unbalanced value.

As a result, when the amount of laundry is small, even if there is an imbalance by a small amount of laundry, dehydration can be started, so that dehydration can be started and the stroke can be advanced without any problems.

The invention according to claim 1 of the present invention is characterized by controlling the operations of a water support tank elastically supported in a washing machine body, a drum disposed in the water supply tank so as to be rotatable, a motor for driving the drum, and the motor. And control means for executing each stroke of washing, rinsing, and dehydration, the control means having a stroke for determining an imbalance of the laundry due to the deflection of the laundry at the start of dehydration, the imbalance value being at least once When the amount of laundry is reached in a small amount, the amount of laundry is judged to be a small amount. In the process of determining the imbalance of the laundry, it is possible to determine that the amount of laundry is a small amount according to another criterion based on the unbalance value. It is possible to precisely determine that the amount of laundry is a small amount without providing a stroke.

Invention of Claim 2 controls the washing and rinsing of the water tank which is elastically supported in the washing machine main body, the drum arrange | positioned rotatably in the said water tank, the motor which drives the said drum, the operation of the said motor, etc. And control means for executing each stroke of dewatering, wherein the control means has a stroke for determining the imbalance of the laundry due to the deflection of the laundry at the start of dehydration, and the imbalance value has reached at least the second predetermined value. When the number of imbalance corrections to be executed reaches a predetermined number of times, the amount of laundry is determined as a small amount. When the amount of laundry is a small amount, even if the imbalance correction is performed, the unbalance value is less than the second predetermined value. In this case, the quantity of the laundry can be determined by the number of times to correct the imbalance of the laundry, and the quantity of the laundry is a small amount. Can be determined precisely.

According to the invention of claim 3, the water holding tank elastically supported in the washing machine body, the drum disposed in the water receiving tank to be rotatable, the motor for driving the drum, the operation of the motor and the like to control the washing, And control means for executing each stroke of rinsing and dehydration, the control means having a stroke for determining the imbalance of the laundry due to the deflection of the laundry at the start of dehydration, wherein the unbalance value is at least once the first predetermined value or more. When the number of imbalance corrections performed when the unbalance value reaches the second predetermined value or more reaches a predetermined number of times, the amount of the laundry is determined in small quantities so that the amount of the laundry is small. have.

In the invention described in claim 4, in the invention described in claims 1 to 3, the control means changes the predetermined value for determining the unbalance when the amount of the laundry is determined in small amounts from the unbalanced value. In this small amount, even if there is an imbalance due to a small amount of laundry, dehydration can be started by not determining it as an imbalance, and the stroke can be advanced without any trouble.

In the invention described in claim 5, in the invention according to claim 4, the control means changes the second drum rotation speed in the intermediate dewatering stroke and the dewatering stroke when the amount of laundry is determined in a small amount from the unbalanced value. By changing to the rotation speed of the drum of the intermediate dehydration stroke and the dehydration stroke, the resonance point of the vibration coming from the structure and the floor can be avoided, and the shaking of the washing machine main body can be reduced.

In the invention described in claim 6, in the invention according to claim 4, the control means rotates when the second drum rotation speed is reached in the intermediate dewatering stroke and the dewatering stroke, when the amount of laundry is determined in a small amount from the unbalance value. By stopping the operation and performing an imbalance determination again, the water from the laundry falls out and the deflection of the laundry decreases, thereby increasing the probability of starting at the first drum rotational speed.

In the invention according to claim 7, in the invention according to the claims 1 to 3, when the control means judges a small amount of the laundry from the unbalance value, the intermediate dewatering step thereafter is omitted. By determining that the laundry is unbalanced, it is possible to shorten the time related to the imbalance correction performed and the time related to the intermediate dehydration.

In the invention according to claim 8, in the invention according to claim 7, the control means changes the operating time of the rinsing when the amount of the laundry is determined in a small amount from the unbalanced value, and the rinsing when the intermediate dehydration is omitted. The decrease in rate can be compensated for.

In the invention according to claim 9, in the invention according to claim 7, the control means is configured to change the level of rinsing when a small amount of laundry is determined from an unbalanced value, and the rinsing rate when the intermediate dehydration is omitted. It can compensate for the degradation.

In the invention according to claim 10, in the invention according to claim 7, the control means changes the operating time and the water level of the rinsing when the amount of the laundry is determined in a small amount from the unbalanced value. It is possible to compensate for the decrease in the rinsing rate.

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

2 is a cross-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 according to the first embodiment of the present invention;

4 is an operation flowchart of the drum type washing machine according to the first embodiment of the present invention;

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

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

7 is an operation flowchart of a drum type washing machine according to a fourth embodiment of the present invention;

8 is an operation flowchart of a drum type washing machine according to a fifth embodiment of the present invention;

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

Explanation of symbols for the main parts of the drawings

1 drum 3 drip tank

9: washing machine body 18: first motor (motor)

19: second motor (motor) 24: control means

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings. In addition, the same code | symbol is attached | subjected to the structure same as a conventional example, and description is abbreviate | omitted.

Example 1

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 The motor (motor) 19 spins the drum 1 at high speed N2 (for example, 1000 r / min) to dewater. These first motors 18 and second motors 19 are constituted by induction motors and are connected to driven pulleys 22 via belts 20 and 21, respectively.

The driven pulley 22 has two types of reduction ratios, connects the first motor 18 to the driven pulley 22a having a large reduction ratio via the belt 20, and connects the second motor 19 to the belt 21. It is connected to the driven pulley 22b with a small reduction ratio via it, and is fixed to the other end of the horizontal shaft 4 in which one end was fixed to the rotation center of the drum 1.

The control apparatus 23 of FIG. 2 controls the heater 13, the water supply valve 14, the drain pump 15, the 1st motor 18, the 2nd motor 19, etc., and is shown in FIG. It is configured as. The control means 24 is composed of a microcomputer and passes through a power supply switching means 25 composed of a bidirectional thyristor or the like, and the heater 13, the water supply valve 14, the drain pump 15, and the first motor. (18), the second motor 19 and the like are controlled to gradually control a series of steps of washing, rinsing, and dehydration.

The input setting means 26 inputs the necessary setting course, the start of the operation, and the like, and is input to the control means 24. The display means 27 displays the setting contents, the operation state, etc. by the input setting means 26. The water level detecting means 28 detects the water level in the drip tank 3 and is input to the control means 24.

The water level detecting means 28 is connected to the drip tank 3, and a magnetic body (not shown) is fixedly mounted on the diaphragm operated by the pressure according to the water level in the drip tank 3, and the magnetic body is coiled ( (Not shown) so as to be movable, and the coil is used to form an oscillation circuit, and the positional relationship between the magnetic body and the coil is changed by the diaphragm movement caused by the pressure according to the water level in the drip tank 3. The water level in the drip tank 3 is detected by changing the inductance of the coil and detecting the change of the oscillation frequency of the oscillation circuit.

The water temperature detection means 29 detects the water temperature in the drip tank 3 and is input to the control means 24. The rotation speed detection means 30 is built in the first motor 18 to detect the rotation speed of the drum 1 by detecting the rotation speed, and is input to the control means 24. The storage means 31 stores data necessary for a series of control and the like. Signaling means 32 generates a beep according to the signal of control means 24. Reference numeral 33 is a commercial power supply, and reference numeral 34 is a power switch.

The control means 24 is provided with a stroke for determining the unbalance of the laundry due to the deflection of the laundry at the start of dehydration, wherein the unbalance value is at least once the first predetermined value (the rotational speed variation of the drum 1 is 13r / min). When the above is reached, the quantity of laundry is determined in small quantities. When the amount of laundry is determined in small quantities, the subsequent intermediate dewatering stroke is omitted. In addition, when the control means 24 determines a small amount of the laundry from the unbalanced value, the control means 24 changes the predetermined value for determining the unbalance by the subsequent stroke.

Here, the process of determining the imbalance of the laundry due to the deflection of the laundry at the start of dehydration will be described. The rotation of the drum 1 by the first motor 18 causes the laundry to be rotated from the low speed N1 (53 r / min). A balance control stroke is performed to gradually raise the rotational speed (for example, 100 r / min) attached to the inner surface of (1) to uniformly adhere the laundry to the inner surface of the drum (1), and then rotate the rotational speed. The conduction angle of the power switching means 25 at the time of control at (100r / min) is obtained, and the variation in the rotational speed of the drum 1 at the time of fixing and operating at this conduction angle causes the imbalance of the laundry due to the deflection of the laundry. The imbalance of the laundry is determined from the point of correlation with.

The operation will be described with reference to FIG. 4 in the above configuration. Steps 50 to 52 are intermediate dewatering strokes of the rinsing stroke 1 performed in step 53, in which the control means 24 operates the first motor 18 to rotate the speed of the drum 1. The balance control to gradually raise the pressure is made to uniformly attach the laundry to the drum 1. Next, if the rotation speed variation of the drum 1 due to the deflection of the laundry adhered in step 51 is 3 r / min or less, it is determined that there is no problem due to the imbalance of the laundry even if it is rotated at high speed during dehydration. At 52, the second motor 19 is operated to terminate dehydration for a predetermined time. Next, in step 53, a rinsing is performed to operate the water supply valve 14 while rotating the drum 1.

Next, in step 51, if the rotational speed variation of the drum 1 is 3r / min or more, proceed to step 54; in step 54, if the rotational speed variation of the drum 1 is 13r / min or more At 55, the amount of laundry is determined in small amounts (called small amount detection), and the flow proceeds to step 53. If the rotational speed variation of the drum 1 in step 54 is 13 r / min or less, the process proceeds to step 56, where the imbalance correction is executed to stop the drum 1 and execute balance control from the beginning. Imbalance correction is performed up to a predetermined number of times (for example, six times). If the predetermined number of times is exceeded, the process proceeds to step 53.

After performing the rinsing in step 53, the control means 24 in step 57 skips the intermediate dehydration stroke in steps 58 to 60, if a small amount of detection is performed in step 55. When the process shifts to the rinse rinse 2 in (61), and a small amount of detection is not performed, the same operations as the rinse stroke 1 are performed as in steps 58 to 60 and 62 to 64.

Steps 65 to 68 are final dewatering strokes, when there is a small amount of detection by the rinsing stroke, after the balance control is terminated in step 65, a predetermined value, i.e., the number of revolutions, is determined in step 71. The fluctuation is raised (e.g., 10 r / min), and dehydration is performed in step 68 to end.

If there is no small amount detection, an imbalance determination is made in step 67, and if the rotational speed fluctuation is 3 r / min or less, the final dehydration is performed and ends. If the rotation speed change is 3r / min or more, the process proceeds to step 69. If the rotation speed change of the drum 1 in the step 69 is 13r / minute or more, the amount of laundry is determined in a small amount in step 70. The process proceeds to step 71.

If the rotational speed variation of the drum 1 in step 69 is 13 r / min or less, the process proceeds to step 72, where the imbalance correction is executed to stop the drum 1 and execute balance control again from the beginning. If the imbalance correction is performed up to a predetermined number of times (six times), and the predetermined number is exceeded, the process proceeds to step 73 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 determining the imbalance of the laundry due to the deflection of the laundry at the start of dewatering, and when the unbalance value reaches at least once the first predetermined value, Since the amount of laundry is determined in small amounts, in the stroke for determining the imbalance of the laundry, it is possible to determine that the amount of the laundry is a small amount based on another judgment criterion from the unbalanced value, without providing a stroke for small amount determination, It can be precisely determined that the amount of the laundry is a small amount.

When the amount of laundry is determined in small quantities, the subsequent intermediate dewatering stroke is omitted. Therefore, the time for the correction of imbalance and the time for intermediate dewatering performed by determining that the laundry is unbalanced in the intermediate dewatering stroke are shortened. can do. When a small amount of laundry is determined from the unbalanced value, the predetermined value for determining the unbalance is changed. Therefore, when the amount of the laundry is small, even if there is an imbalance due to a small amount of laundry, the unbalanced value is not determined. Dehydration can start from the point, and the administration can be advanced without any problems.

Example 2

The control means 24 in FIG. 1 has a stroke for determining the unbalance of the laundry due to the deflection of the laundry at the start of dehydration, and the unbalance value is the second predetermined value (the rotational speed variation of the drum 1 is 3r / When the number of imbalance corrections to be executed when the number of minutes or more is reached reaches a predetermined number of times (for example, six times), the amount of laundry is determined in a small amount. When the amount of laundry is determined in small amounts, the operation time of the rinsing is changed. The other configuration is the same as that of the first embodiment.

In the above configuration, the operation will be described with reference to FIG. Steps 74 to 76 are intermediate dewatering strokes of the rinsing stroke 1 performed in step 77, in which the control means 24 operates the first motor 18 to rotate the drum 1. The balance control to gradually raise the pressure is made to uniformly attach the laundry to the drum 1. Next, if the rotation speed variation 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 to perform dehydration for a predetermined time. To exit. Next, in step 77, rinsing is performed to operate the water supply valve 14 while rotating the drum 1.

Next, in step 75, if the rotation speed variation of the drum 1 is 3r / min or more, the flow advances to step 78 to execute the imbalance correction which stops the drum 1 and executes balance control again from the beginning. . Imbalance correction is performed up to a predetermined number of times (6 times). If the predetermined number of times is exceeded, the process proceeds to step 79, where the amount of the laundry is determined in small amounts (a small amount of detection), and in step 80, the rinsing time is changed to 4 minutes to rinse. This is because the rinsing rate becomes poor when the intermediate dehydration is skipped as described later. Therefore, the rinse time is compensated for by the change of the rinsing time.

In step 81, the control means 24 skips the intermediate dewatering stroke of steps 82 and 83 when the small amount of detection is first performed by the previous rinsing stroke 1 to the rinse stroke 2 of step 85. In the case where a small amount of detection is not executed, the same operation as that of the rinsing stroke 1 is performed as in steps 82 to 84 and 86 to 88.

Steps 89 to 97 are predetermined values, i.e., rotational speed fluctuations, in which the imbalance is determined in step 95 after the balance control is terminated in step 89 when there is a small amount of detection by the rinsing stroke as the final dewatering stroke. Is increased (for example, 10 r / min), and if it is 10 r / min or less, dehydration is performed in step 92 to end.

If there is no small amount of detection, an imbalance determination is made in step 91, and if the rotation speed change is 3 r / min or less, the final dehydration is performed to end. If the rotational speed fluctuation is 3 r / min or more, the flow proceeds to step 93, where an imbalance correction is performed up to a predetermined number (6 times). If the predetermined number of times is exceeded, the process proceeds to step 94, where a small amount of laundry is determined (a small amount of detection), and the process proceeds to step 95.

If the rotational speed fluctuation of the drum 1 in step 95 is 10 r / min or less, dehydration is performed in step 92 as described above to end. If the rotational speed variation of the drum 1 is 10 r / min or more, the flow proceeds to step 96, where the imbalance correction is performed up to a predetermined number of times (six times). If the predetermined number of times is exceeded, the process proceeds to step 97, where an abnormal signal is sent to inform the user.

As described above, according to the present embodiment, the control means 24 has a stroke for determining the imbalance of the laundry due to the deflection of the laundry at the start of dehydration, and the unbalance value is the second predetermined value (the rotational speed variation of the drum 1). When the number of imbalance corrections to be executed when reaching 3 r / min or more reaches a predetermined number of times (6 times), the amount of laundry is determined to be a small amount. By determining that this is a small amount, it is possible to precisely determine that the amount of the laundry is a small amount.

In addition, when it is determined that the amount of laundry is a small amount, since the operation time of the rinsing is changed, the decrease in the rinsing rate when the intermediate dehydration is omitted can be compensated.

In addition, in the present embodiment, when the amount of laundry is determined in small amounts, the operation time of the rinsing is changed. However, the operation of the rinse may be changed, and the same operation may be performed even if the operation time and the water level of the rinsing are changed. The effect can be obtained.

Example 3

The control means 24 in FIG. 1 has a stroke for determining the imbalance of the laundry due to the deflection of the laundry at the start of dehydration, and the unbalance value is at least once the first predetermined value (the rotation speed of the drum 1 fluctuations). The number of imbalance corrections to be executed when the value reaches 13 r / min or more and the unbalance value reaches the second predetermined value (3 r / min in the rotational speed of the drum 1) or more. When a) is reached, determine the amount of laundry in small quantities. 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. In addition, since the operations of steps 74 to 79 and steps 81 to 87 are the same as those of the second embodiment, description thereof is omitted.

Steps 98 to 101 are final dewatering strokes, in which there is a small amount of detection in the rinsing stroke, after the balance control is terminated in step 98, a predetermined value, i.e., rotational speed variation, is determined in step 102; Is lower than the small amount detection at the time of rinsing (for example, 12 r / min), and if the rotation speed variation of the drum 1 exceeds 12 r / min, the amount of laundry is determined in step 104 as a small amount.

If there is no small amount detection, an imbalance is determined in step 100, and if the rotational speed fluctuation is 3 r / min or less, the final dehydration is executed to end. If the rotation speed change is 3r / min or more, proceed to step 103, and if the rotation speed change of the drum 1 exceeds 13r / minute, in step 104 the amount of laundry is determined in small quantities and step 105 Proceed to). In step 105, the predetermined value for determining the imbalance, i.e., the rotational speed variation is increased (e.g., 10 r / min), and dehydration is executed in step 101 to end.

If the rotation speed variation of the drum 1 is 12 r / min or less in step 102, and the rotation speed variation of the drum 1 is 13 r / min or less in step 103, the process proceeds to step 106, where the drum 1 ), Then execute the imbalance correction which executes the balance control again from the beginning. If the imbalance correction is performed up to a predetermined number of times (six times), and the predetermined number is exceeded, the process proceeds to step 107 where an abnormal signal is sent to inform the user.

As described above, according to the present embodiment, the unbalance value reaches at least once the first predetermined value (the rotational speed variation of the drum 1 is 13 r / min) or more, and the unbalance value is the second predetermined value (the drum 1). When the number of unbalanced corrections to be executed when the rotation speed change of the motor reaches 3 r / min or more reaches a predetermined number of times (6 times), the amount of the laundry is determined to be small. Can be determined.

Example 4

When the control means 24 in FIG. 1 judges the quantity of the laundry to be a small amount from the unbalance value, the rotation speed of the drum 1 is set to the second rotation speed (for example, 500 r in the intermediate dewatering stroke and the dewatering stroke). / Minute). Other configurations are the same as those of the first to third embodiments.

In the above configuration, the operation will be described with reference to FIG. Steps 108 to 115 are operations of the dehydration stroke after detecting a small amount in the rinsing stroke, and the control means 24 controls the balance in step 109, and then makes an unbalance determination in step 110 so that the rotational speed variation is 3r. If less than / min, the drum 1 is rotated at a high speed N2 (1000r / min) in step 111 to execute final dehydration to end.

If the rotational speed variation is 3r / min or more, proceed to step 112, and if the rotational speed variation is 10r / min or less, the second rotational speed falls short of the resonance coming from the strength of the floor and the product strength in step 113. By changing to (500r / min), the vibration of the washing machine main body 9 is reduced.

In step 112, if the rotational speed change is 10 r / min or more, the process proceeds to step 114, where an imbalance correction is executed to stop the drum 1 and again execute balance control from the beginning. The imbalance correction is executed up to a predetermined number of times (six times), and when the predetermined number of times is exceeded, the process proceeds to step 115 and an abnormal signal is sent to notify the user.

As described above, according to this embodiment, when the amount of laundry is determined in small amounts from the unbalanced value, in the intermediate dewatering stroke and the dewatering stroke, the rotation speed of the drum 1 is set to the second rotation speed (for example, 500 r / min. ), The resonance point of the vibrations coming from the structure and the floor can be avoided, and the shaking of the washing machine body can be reduced.

Example 5

The control means 24 in FIG. 1 stops the rotation when the second drum rotation speed (500r / min) is reached in the intermediate dewatering stroke and the dewatering stroke, when the amount of the laundry is determined in a small amount from the unbalanced value. Then, the imbalance determination is performed again. 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. Steps 116 to 124 are controlled by the dehydration stroke after a small amount of detection in the rinse stroke, so that the control means 24 balances the control in step 117, and then unbalance is determined in step 118 so that the rotational speed fluctuation is 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 execute final dehydration to end.

If the rotational speed variation is 3r / min or more, proceed to step 120. If the rotational speed variation is 10r / min or less, in steps 121 and 122, the rotational speed that is less than the resonance resulting from the strength of the floor and the product strength ( Dehydration by raising to 500r / min, and proceeding to step 123 if the rotational speed variation is 10r / min or more, and performing the balance control of step 117 after stopping, resulting in an imbalance between steps 118 and 120 The imbalance correction for performing the determination is executed up to a predetermined number (6 times). If the predetermined number of times is exceeded, the process proceeds to step 124, where an abnormal signal is sent to inform the user.

As described above, according to the present embodiment, when the amount of laundry is determined in small amounts from the unbalanced value, in the intermediate dewatering and dewatering strokes, the number of revolutions (500r / min) falls short of the resonance resulting from the strength of the floor and the product. The dehydration is increased by dehydration, so that, for example, the weight difference between the cotton containing a lot of water and the chemical fiber that does not contain much water is reduced, and the imbalance is corrected. Then, the imbalance correction is performed a predetermined number of times. ) Can be dehydrated by rotating at a high speed N2 (1000 r / min), thereby ensuring a dehydration rate.

According to the invention as described in claim 1 of the present invention as described above, the drip tray is elastically supported in the washing machine body, the drum disposed in the drip tank and rotatably disposed, the motor for driving the drum, the motor and the like Control means for controlling the operation to execute washing, rinsing, and dehydration steps, wherein the control means includes a step for determining an imbalance of the laundry due to the deflection of the laundry at the start of dehydration, the imbalance value being at least 1; Since the amount of the laundry was determined in small quantities when the first predetermined value was reached, the stroke can be judged to be a small amount of laundry according to another determination criterion from the unbalanced value. It is possible to determine favorably that the amount of laundry is a small amount without providing a stroke for the small amount determination.

In addition, according to the invention of claim 2, by controlling the operation of the drip tray is elastically supported in the washing machine body, the drum disposed in the drip tank to be rotatable, the motor for driving the drum, the motor and the like And control means for executing washing, rinsing, and dewatering steps, wherein the control means includes a step for determining an unbalance of the laundry due to the deflection of the laundry at the start of dehydration, and the unbalance value is greater than or equal to the second predetermined value. When the number of imbalance corrections to be executed when reaching a predetermined number of times is determined, the amount of laundry is determined to be small. Therefore, when the amount of laundry is small, the imbalance value becomes equal to or less than the second predetermined value even when the imbalance is corrected. There are few things, and at this time, it is judged that quantity of laundry is small quantity by the number of times to correct imbalance of laundry, and laundry That the amount is a small amount can be precisely determined.

In addition, according to the invention of claim 3, the water tank is elastically supported in the washing machine body, the drum disposed in the water tank and rotatably disposed, the motor for driving the drum, the operation of the motor and the like Control means for executing each stroke of washing, rinsing, and dehydration, the control means having a stroke for determining the imbalance of the laundry due to the deflection of the laundry at the start of dehydration, the imbalance value being at least once Since the amount of laundry is determined in small quantities when the number of imbalance corrections performed when the predetermined value or more and the unbalance value reaches the second or more predetermined value reaches a predetermined number, it is precisely determined that the amount of the laundry is small. It can be determined.

In addition, according to the invention as set forth in claim 4, when the control means determines a small amount of the laundry from the unbalanced value, the control means changes the predetermined value for determining the unbalance. Even if there is an imbalance, dehydration can be started by not determining it as an imbalance so that the stroke can be advanced without any problems.

Further, according to the invention of claim 5, when the control means determines the amount of the laundry to a small amount from the unbalanced value, the control means is adapted to change to the second drum rotational speed in the intermediate dewatering stroke and the dewatering stroke. By changing to the rotation speed of the drum of the dehydration stroke, the resonance point of the vibrations coming from the structure and the floor can be avoided, and the shaking of the washing machine main body can be reduced.

Further, according to the invention as claimed in claim 6, when the control means judges the amount of laundry in a small amount from the unbalance value, in the intermediate dewatering stroke and the dewatering stroke, when the second drum rotation speed is reached, the rotation is stopped and again unbalanced. Since the determination is made, the water from the laundry is drained, and the deflection of the laundry is reduced, so that the probability of starting at the first drum rotation speed can be increased.

In addition, according to the invention as set forth in claim 7, when the control means determines a small amount of the laundry from the unbalanced value, the subsequent intermediate dewatering stroke is omitted so that the laundry is judged to be unbalanced in the intermediate dewatering stroke. The time for imbalance correction and the time for intermediate dehydration can be shortened.

In addition, according to the invention as set forth in claim 8, the control means compensates for the decrease in the rinsing rate when the intermediate dehydration is omitted since the control means causes the operation time of the rinsing to be changed when a small amount of the laundry is determined from the unbalanced value. can do.

In addition, according to the invention as set forth in claim 9, since the control means causes the rinsing level to be changed when a small amount of laundry is determined from the unbalanced value, the decrease in the rinsing rate when omitting intermediate dehydration can be compensated. have.

In addition, according to the invention as set forth in claim 10, when the control means determines the amount of laundry to be a small amount from the unbalanced value, the rinsing operation time and the water level are changed. It can be supplemented.

Claims (10)

Controls operations of the drip tray, which is elastically supported in the washing machine body, the drum disposed in the drip tank and rotatably disposed, the motor for driving the drum, and the motor, to perform washing, rinsing, and dehydration steps. And a control means for determining the imbalance of the laundry due to the deflection of the laundry at the start of dehydration, and when the unbalance value reaches at least once the first predetermined value, Judged in small quantities Drum Washing Machine. Controls operations of the drip tray, which is elastically supported in the washing machine body, the drum disposed in the drip tank and rotatably disposed, the motor for driving the drum, and the motor, to perform washing, rinsing, and dehydration steps. And a control means for determining an imbalance of the laundry due to the deflection of the laundry at the start of dehydration, wherein a predetermined number of imbalance corrections to be executed when the unbalance value reaches to the second predetermined value or more is provided. When the number of times reached reaches a small amount of laundry Drum Washing Machine. Controls operations of the drip tray, which is elastically supported in the washing machine body, the drum disposed in the drip tank and rotatably disposed, the motor for driving the drum, and the motor, to perform washing, rinsing, and dehydration steps. And a control means for determining an imbalance of the laundry due to the deflection of the laundry at the start of dehydration, wherein the unbalance value reaches at least once the first predetermined value and the unbalance value When the number of imbalance corrections performed when the second predetermined value or more reaches reaches the predetermined number of times, the amount of laundry is determined in small quantities. Drum Washing Machine. The method according to any one of claims 1 to 3, The control means changes the predetermined value for determining the imbalance when determining the amount of laundry in a small amount from the unbalanced value. Drum Washing Machine. The method of claim 4, wherein The control means changes the second drum rotation speed in the intermediate dewatering stroke and the dewatering stroke when the amount of laundry is determined in small amounts from the unbalanced value. Drum Washing Machine. The method of claim 4, wherein The control means stops the rotation when the second drum rotation speed is reached in the intermediate dewatering stroke and the dewatering stroke when the amount of the laundry is determined in a small amount from the unbalanced value. Drum Washing Machine. The method according to any one of claims 1 to 3, The control means skips the subsequent intermediate dewatering stroke when judging a small amount of laundry from the unbalanced value. Drum Washing Machine. The method of claim 7, wherein The control means changes the operation time of the rinse when determining the amount of laundry in a small amount from the unbalanced value. Drum Washing Machine. The method of claim 7, wherein The control means changes the level of rinsing when the amount of laundry is determined in small amounts from the unbalanced value. Drum Washing Machine. The method of claim 7, wherein The control means changes the operating time and the water level of the rinse when determining the amount of laundry in a small amount from the unbalanced value. Drum Washing Machine.