JP5082367B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine that performs washing, rinsing, dehydration and drying.

  Conventionally, this type of washing machine is configured as shown in FIG. 6 (see, for example, Patent Document 1). In FIG. 6, the washing tub 51 is provided with a large number of water passage holes 52 on the entire outer periphery thereof, and is rotatably disposed in the water receiving tub 53. The washing tub 51 is rotationally driven by a motor 54. The lid 55 is provided in the washing machine main body 56 so that the opening 53a of the water receiving basin 53 can be freely opened and closed. The water receiving tub 53 is suspended from the washing machine body 56 by a spring body 57, and is supported by an anti-vibration damper 58 so that vibration during dehydration is not transmitted to the washing machine body 56, and vibration during dehydration is also supported. A weight 59 for reduction is provided.

  The water supply valve 60 supplies water into the water receiving tank 53 when it is easy to wash. The drainage pump 61 is connected to the water receiving tank 53 on the input side and to the hose 62 on the output side. The washing water is drained. The control device 63 controls operations of the motor 54, the water supply valve 60, the drainage pump 61, and the like, and sequentially controls a series of processes such as washing, rinsing, and dehydration.

  The operation in the above configuration will be described. When the lid 55 is opened, the laundry is put into the washing tub 51 and the operation is started. When the washing tub 51 is rotated at a low speed by the motor 54, the laundry in the drum 51 is lifted. It is dropped and water is supplied from the water supply valve 60 while continuing this operation. When a predetermined amount of water is supplied, water supply is stopped and washing is continued, and the laundry in the washing tub 51 is lifted and dropped onto the water surface.

Thus, the washing process proceeds. The rinsing process includes a rinsing process and an intermediate dehydration process, and the rinsing process is performed in the same manner as the washing process. In the intermediate dehydration process executed before the rinsing and agitation process, if the laundry in the washing tub 51 is biased, that is, if an imbalance occurs, the washing tub 51 and the water receiving tub 53 vibrate, so the laundry imbalance is corrected. For this purpose, a cloth unwinding process in which the washing tub 51 repeats forward and reverse is performed, and then the washing tub 51 is slowly started up, and a balance control process is performed in which the laundry is evenly adhered to the inner surface of the washing tub 51.
Japanese Patent Laid-Open No. 10-211387

  However, in such a conventional configuration, in order to keep the cloth unbalance judgment value low in order to suppress vibration and noise, the unbalance state is not corrected in the cloth type and the cloth amount, and the unbalance is corrected. Repeatedly, the washing time becomes longer. Or there was a problem that dehydration did not end due to abnormal notification.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and aims to reduce the number of times of unbalance correction and shorten the time and suppress vibrations at the start of dehydration.

In order to solve the above-described conventional problems, the washing machine of the present invention performs a loosening process by an unbalance activation correction unit based on the output of the post-washing process unbalance amount estimation unit, and the unraveling step includes the motor The first unraveling step and the second unraveling step, which are different from the first unraveling step, are performed while continuously rotating.

  By performing the unwinding operation that accelerates the cloth entangled in the washing process in a short time, the cloth is loosened, and it is executed in continuous operation without stopping the motor, thereby reducing the number of imbalance corrections and shortening the washing time. Therefore, dehydration can be started by shortening the time of all processes and suppressing abnormal vibrations of the washing tub and the receiving cylinder.

  The washing machine of the present invention can reduce time and vibration at the start of dehydration.

A first invention includes a washing tub for rotating laundry, a motor for rotationally driving the washing tub, a receiving tube that accommodates the washing tub and is supported by a support means with respect to a housing, and the receiving tube Based on the outputs of the vibration detection means for detecting the vibration of the vibration, the unbalance amount estimation means for estimating the unbalance amount according to the output of the vibration detection means, and the outputs of the vibration detection means and the unbalance amount estimation means. Control means for controlling a motor, and the control means performs a loosening step of accelerating the washing tub instantaneously based on the output of the unbalance amount estimation means after the washing step, and the loosening step includes After the first unraveling process for reversing and normal rotation of the washing tub, the washing process is completed by performing a second unraveling process for reversing and normal rotation of the washing tub at a rotation speed different from that of the first unraveling process. For later unraveling process There are, unbalance condition is improved, it is also possible to launch the dehydration suppressing the abnormal vibration of the time savings and washing tub and the receiving tube of the entire process. Therefore, it is possible to solutions anti imbalance is bias of laundry in the dehydrating process, and vibrations caused by the unbalance, since it is possible to reduce noise, is possible to achieve low vibration, high-speed dehydration of low noise It is possible to reduce vibrations and noise caused by the unevenness of the laundry, and to improve the safety of the product.

The control means, loosened by accelerating the washing tub instantly process, the laundry tangled strongly in the washing step can sail Gus and time saving an abnormal of the washing tub and the water tub of the entire process It is possible to start dehydration while suppressing vibration.

Further, by increasing the acceleration of the first unraveling step compared to the second unraveling step, the acceleration is increased in the first unraveling step, the laundry entangled in the washing step is unraveled, and the first unraveling step in which the acceleration is small is first. by the loosening loosening process correction may Holdings ho laundry tangled in the washing step, it is possible to launch the dehydration suppressing the abnormal vibration of the time savings and washing tub and the water tub of the entire process.

Further, the control means, by providing the lowering step of lowering the rotational speed determining unbalance after the second disentangling step, can determine the unbalance, and it is possible to suppress abnormal vibration of the washing tub and the water tub , Time reduction of all processes and stable dehydration can be launched.

In the second invention, in particular, the control means of the first invention increases the number of times of acceleration in the first unraveling process more than the second unraveling process, thereby increasing the number of times of the laundry that is strongly entangled in the washing process. after crushing in the first loosening step, by the loosening correction of the first loosening step in a second loosening step, it is possible to loosen the washing濯物, save time and washing tub and the water tub of the entire process abnormal vibration it is possible to launch the dehydration with reduced.

In the third invention, in particular, the control means of the first or second invention loosens in the loosening step by lowering to a rotational speed at which the relationship between the centrifugal force of the laundry and the balance of gravity is substantially equal in the lowering step. The laundry can be evenly distributed in the washing tub, and the correction can be made so that the laundry can be stably attached to the washing tub, shortening the entire process time and suppressing abnormal vibrations in the washing tub and water receiving tub. Can launch dehydration.

In the fourth invention, in particular, the control means of any one of the first to third inventions loosens the laundry strongly entangled in the washing process to some extent by performing the waste water stirring process after the washing process and before the loosening process. By correcting the next unraveling process, dehydration can be started by shortening the time of all processes and suppressing abnormal vibrations in the washing tub and water receiving tub.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a block diagram of a control device that suppresses vibration due to unbalance of the laundry in the washing machine according to the first embodiment of the present invention. In FIG. 1, 10 is a housing, 11 is a washing tub for storing and rotating laundry, and 12 is a motor for rotating the laundry tub while controlling the speed. 13 is a receiving cylinder in which a washing tub is installed and water enters, 18 is a cover having a laundry insertion port, 14 is a seal packing for eliminating the gap between the receiving tube 13 and the cover 18 having the laundry insertion port, Reference numeral 15 denotes a support spring for holding the posture of the receiving cylinder 13, and 16 denotes a damper for reducing vibration generated when the motor rotates to reduce vibration transmission to the housing 10 and the floor.

  Reference numeral 17 denotes a displacement sensor / vibration sensor as a vibration detection means, which senses mass and vibration amount from sensor signals. Reference numeral 19 denotes an anti-vibration rubber for installing the housing 10 on the floor, and the support spring 15 and the damper 16 constitute support means. Further, 20 is an unbalance estimation means for estimating the unbalance amount from the vibration sensor signal, and 21 is a control means for controlling the rotation of the motor 12.

  Further, the control means 21 has a speed detection means 23 for detecting the rotational speed of the motor 12. The control amount calculation means 24 calculates a speed deviation based on the difference between the rotation speed command value of the motor 12 and the detected actual rotation speed, calculates a control amount based on the speed deviation, and outputs it. The drive unit 25 that outputs a control amount in accordance with the command of the balance activation correction unit 22 outputs a three-phase PWM drive current based on the control amount U.

  FIG. 2 is a flowchart showing an operation sequence of the control device for the washing machine according to the first embodiment of the present invention. In FIG. 2, in the dehydration process, after the washing process is completed, in step S2, the reverse and forward rotations are each stirred for 15 s at a rotational speed of 50 r / min. In step S4, the rotational speed is set to 60 r / min so that the relationship between the centrifugal force of the laundry and the balance of gravity is substantially equal while the laundry tub 11 is rotated and the laundry is loosened by means 22 of the loosening process. Raise in 3s. After that, it is confirmed that it is stable after 11 seconds, and unbalance detection is performed in step S5. The same effect can be obtained even if the rotational speed is set such that the centrifugal force of the laundry is smaller than the gravity. Further, the same imbalance detection can be performed even when the stabilization time is 14 seconds or longer.

  FIG. 3 is a profile of the unbalance amount and the vibration sensor signal. Here, when the unbalance amount is 600 g at the rotation speed of 60 r / min, that is, when the vibration sensor signal is detected to be 18 mV or more, the rotation of the motor 12 is stopped and the unbalance activation correction is performed again. If the unbalance amount is 600 g or less, the centrifugal force of the laundry is set to a rotational speed greater than gravity. Here, it is set to 80 r / min, is increased at an acceleration time of 3 s, and unbalance detection is performed after 30 s of stabilization. Similar imbalance detection can be performed even when the stabilization time is 1 min or longer.

Here, when the unbalance amount is 600 g at a rotational speed of 80 r / min, that is, when the vibration sensor signal is detected to be 50 mV or more, the rotation of the motor 12 is stopped and the unbalance activation correction is performed again. If the unbalance amount is 600 g or less, the rotational speed is increased while rotating the motor 12, and the dehydration process is performed.

(Embodiment 2)
FIG. 4 is a flowchart showing an operation sequence of the control device for the washing machine according to the second embodiment of the present invention, and FIG. 5 shows the number of rotations in the loosening process of the washing machine according to the second embodiment of the present invention. Command sequence. Since the basic configuration of the control means is the same as that of the first embodiment, the basic description is omitted here. Further, the same components as those in the first embodiment are denoted by the same reference numerals as those in FIG.

  4 and 5, after the washing process is finished, in step S2, as shown in FIG. 5, the agitation is performed to invert and rotate at a rotational speed of 50 r / min, and then the unbalance activation correction means At 22, the loosening process is performed. Here, as shown in FIG. 5, the 1st unwinding process and the 2nd unraveling process which accelerate a unwinding process in a short time were set. First, in step S12, in the first unraveling process of FIG. 5, the rotation speed is set to 180 r / min, and the reversal and forward rotation are loosened by 3 s each. Next, continuously in step S13, in the second unwinding step of FIG. 5, the rotational speed is set to 120 r / min, and the reversal and forward rotation are loosened by 3 seconds each. After that, without stopping the rotation operation of the motor 12, in step S4, as shown in FIG. 5, a lowering process is performed to lower the rotational speed to 60 r / min. Subsequent operations are the same as those in the first embodiment.

Here, in the first unraveling process, it is important to always increase the acceleration, compared to the second unraveling process. Here, the acceleration of the first unraveling was 1 r / s2, and the acceleration of the second unraveling process was 0.67 r / s2. In addition, by increasing the number of times the first unraveling process is accelerated than the second unraveling process, the laundry unraveled in the first unraveling process can be further unraveled and corrected in the second unraveling process. The laundry can be attached to the washing tub, the time of all processes can be shortened, the abnormal vibration of the washing tub 11 and the receiving cylinder 13 can be suppressed, and dehydration can be started up, and the safety of the product can be improved. it can. Here, the number of times of acceleration of the first unraveling was 4 times, and the number of times of acceleration of the second unraveling process was 2.5 times.

  Here, the rotational speed and acceleration time of the first unraveling process are 180 r / min and 3 s, respectively, but similar results can be obtained if the acceleration time is 3 r or less at 150 r / min. Further, similar results can be obtained even at an acceleration at which the laundry is loosened. Moreover, although the rotation speed and acceleration time of the 2nd unwinding were 120 r / min and 3 s, respectively, similar results are obtained if the acceleration time is 3 s or less at 100 r / min. Further, the same result can be obtained even if the acceleration is smaller than the first unraveling step and the acceleration for unraveling and correcting the laundry.

  In addition, since the first unraveling step and the second unraveling step are continuously performed without stopping, the laundry does not stay in a state of being stacked on the bottom of the washing tub, and the laundry can be loosened well. .

  As described above, the washing machine according to the present invention is useful as a washing machine and a washing / drying machine having a drying function because it can shorten time and suppress vibration at the start of dehydration.

1 is a block diagram of a control device for a washing machine according to Embodiment 1 of the present invention. Flowchart of operation sequence of control device of the washing machine Judgment profile diagram of unbalance amount estimation means of the washing machine Flowchart of the washing machine loosening process A graph showing the number of rotations during the unwinding process of the washing machine Cross section of a conventional washing machine

DESCRIPTION OF SYMBOLS 10 Housing | casing 11 Washing tub 12 Motor 13 Receptacle 14 Seal packing 15 Support spring 16 Damper 17 Displacement sensor (vibration detection means)
18 Cover 19 Antivibration Rubber 20 Unbalance Amount Estimation Unit 21 Control Unit 22 Unbalance Start Correction Unit 23 Speed Detection Unit 24 Control Amount Calculation Unit 25 Drive Unit

Claims (4)

A laundry tub for rotating the laundry;
A motor for rotationally driving the washing tub;
A receiving cylinder that accommodates the washing tub and is supported by a supporting means with respect to the housing;
Vibration detecting means for detecting vibration of the receiving tube;
An unbalance amount estimating means for estimating an unbalance amount according to the output of the vibration detecting means; and a control means for controlling the motor based on the outputs of the vibration detecting means and the unbalance amount estimating means,
The control means includes
After the washing step, performing a loosening step of accelerating the washing tub instantaneously based on the output of the unbalance amount estimation means,
The loosening step, after the first loosening step performs inversion and normal rotation of the washing tub, have rows second disentangling step performs inversion and normal rotation of the washing tub at a rotational speed different from the first loosening step,
The acceleration of the first unraveling process is larger than the acceleration of the second unraveling process,
A washing machine comprising a lowering step for reducing the number of revolutions for determining imbalance after the second unraveling step . Control means, the washing machine according to claim 1, characterized in that the number of times of acceleration in the first loosening step to increase from the second disentangling step. The washing machine according to claim 1 or 2, wherein the control means descends to a rotational speed at which the relationship between the centrifugal force of the laundry and the balance of gravity is substantially equal in the descending step. The washing machine according to any one of claims 1 to 3 , wherein the control means performs a drainage stirring step after the washing step and before the loosening step.

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