JP2002263393A - Control device of washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the waste of water resources and operate to the final spin- drying stroke without increasing the number of rinses even in the case when a combined washing and spin-drying vessel gets unbalanced during spin-drying in a rinsing stroke or the case when a motor has a difficulty on starting, in the control device of a washing machine performing the automatic operation of a series of washing, rinsing and spin-drying strokes. SOLUTION: In the case when the abnormality of unbalance is detected by an unbalance-detecting means 14 or when the abnormality of the defective start-up of a motor 5 is determined by the data of a revolution-number detecting means 12 in the spin-drying stroke during a rinsing stroke, the frequency of detecting the abnormalities of unbalance and defective start-up is stored in a storage means 15b storing the frequency of abnormality detection by a control means 15. In the case when the addition of each frequency of abnormality detection is under N times (N>=2), the operation of the spin-drying stroke is discontinued to return to the beginning of the former spin-drying stroke via the operation of the corrected rinsing stroke. Then, the following operation is continued. In the case when it is N times or above, the spin-drying stroke is omitted to shift to the next stroke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a washing machine for automatically operating a series of washing, rinsing and dehydrating steps.

[0002]

2. Description of the Related Art Conventionally, a control device for a washing machine of this type automatically operates a series of washing, rinsing and dehydrating steps in a sequence shown in FIG.
Each step of the brake-water-supply-stirring is made one round, and the same operation is repeated twice. The dehydration process consists of an intermittent dehydration process in which the dehydration speed is slowly raised and an intermediate dehydration process.This intermittent dehydration process increases the dehydration speed in stages and efficiently squeezes the detergent liquid from the laundry. And smoothly shift to the dehydration process.

In recent years, a washing machine equipped with a water-saving rinsing type sequence has appeared, and in this water-saving rinsing sequence, as shown in FIG. Incorporating a "rinse" stroke, a single rinsing stroke consists of the steps of draining, dewatering, braking, waterfall rinsing, dewatering, and braking.

[0004] In the intermittent dewatering process of these two sequences, the washing and dewatering tub becomes unbalanced due to factors such as the displacement of the cloth, and when the unbalance detection is activated, the drainage capacity is poor and a large amount of foam is generated. Accumulation between the water receiving tub and the washing / dewatering tub may have resulted in the motor failing to start.

In each case, the dewatering process is temporarily interrupted, and the operation is returned to the original intermittent dewatering process via the modified rinsing process of "water supply process, stirring process, drainage process". However, if an imbalance abnormality or motor start failure abnormality occurs even if the correction rinsing process is repeated a plurality of times for each abnormality, the progress of the sequence is stopped and the user is notified of each abnormality.

[0006]

However, in the above-described conventional control apparatus, it is assumed that an imbalance abnormality and a motor start failure abnormality are each assumed to be one in the first dehydration step of the rinsing step.
If detected two times, after two correction rinsing steps,
Furthermore, returning to the original sequence, the rinsing operation is performed two more times, which is equivalent to a case where the rinsing operation is performed a total of four times, which greatly wastes water resources and increases the rinsing operation time. Had a problem.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. The number of times of rinsing can be reduced even if the washing and dewatering tub becomes unbalanced during the dewatering of the rinsing process, or if the motor is in a start failure state. The purpose is to reduce the waste of water resources without significantly increasing the amount of water resources, and to operate the final dehydration process without significantly increasing the operation time.

[0008]

In order to achieve the above object, the present invention provides a water level detecting means for detecting a water level, an unbalance detecting means for detecting an unbalanced state of a washing and dewatering tub, a washing and dewatering tub, and a stirring device. The rotation speed detection means for detecting the rotation speed of the motor for driving the wings is input, and the control means drives the motor, water supply means for supplying water to the washing and dewatering tub, and drainage means for draining water in the washing and dehydration tub. A series of washing, rinsing, and dehydrating steps are automatically operated, and the control means detects an imbalance abnormality of the washing and dewatering tub by the unbalance detecting means in the dehydrating step during the rinsing step, or When it is determined from the data of the detecting means that the motor has started abnormally, the storage means for storing the number of times of abnormality detection stores the number of times of detecting the unbalance abnormality and the abnormal starting of the motor. If the number of times of detection of each abnormality is less than N (N ≧ 2), the operation of the dehydration process is interrupted, and the operation of the modified rinsing process of “water supply process, stirring process, drainage process” is performed. Returning to the beginning of the original dehydration step, the subsequent operation is continued, and when the number of times is N or more, the dehydration step is omitted and the process is shifted to the next step.

Thus, even if the washing and dewatering tub becomes unbalanced during the dewatering process of the rinsing process, or if the motor becomes abnormally started, the number of times of rinsing is not greatly increased, and water resources are not increased. The operation can be performed to the final dehydration step without waste and without significantly increasing the operation time.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a motor for driving a washing and dewatering tub and a stirring blade, a water supply means for supplying water to the washing and dewatering tub, and a washing and dewatering tub. Drainage means for draining water in the water, water level detection means for detecting a water level, unbalance detection means for detecting an unbalanced state of the washing and dewatering tub, and rotation number detection means for detecting the rotation number of the motor, Storage means for storing the number of times of abnormality detection, the water level detection means, unbalance detection means,
The rotation speed detection means as input, the motor, water supply means,
Control means for automatically driving a series of washing, rinsing, and dehydrating steps by driving a drain means, wherein the control means detects an imbalance abnormality in the washing and dehydrating tub by an unbalance detecting means in the dehydrating step during the rinsing step. Is detected,
Alternatively, when it is determined from the data of the rotation speed detecting means that the motor has a start failure abnormality, the number of times the imbalance abnormality and the start failure abnormality are detected is stored in the storage means, and the number of times of each abnormality detection is added N times ( If N ≧ 2), the operation of the dehydration step is interrupted, and the operation is returned to the beginning of the original dehydration step via the modified rinsing step of “water supply step, stirring step, and drainage step”, and the subsequent operations are continued. So that N
If the number of times is equal to or longer than the number of times, the dehydration process is omitted and the process is shifted to the next process.If the washing and dehydration tub becomes unbalanced during the dehydration process of the rinsing process, In the case where the start failure occurs, only a maximum of (N-1) “correction rinsing” operations are performed. For example, when N = 2, the total number of rinsing increases by only one. Without reducing the number of times of rinsing, the waste of water resources can be reduced, and the operation can be performed up to the final dehydration step without significantly increasing the operation time, and the sequence is stopped during the rinsing step. Can be lost.

According to a second aspect of the present invention, in the first aspect of the present invention, the control means controls the entrainment in a dehydration step performed before a “fall rinsing” step of supplying water while performing low-speed dehydration during the rinsing step. If the imbalance abnormality of the washing and dewatering tub is detected by the balance detecting means, or if the start of the motor is determined to be abnormal by the data of the rotational speed detecting means, the operation of the dehydrating step is interrupted and the `` water supply step, the stirring step `` Draining stroke '' is configured to return to the beginning of the original dehydration stroke after the operation of the rinsing stroke, continue the subsequent operation, and omit the `` waterfall rinsing '' stroke that is performed next to the dehydration stroke In the case where the “correction rinsing” operation is performed in the rinsing process, the “waterfall rinsing” process is omitted, so that the total number of times of rinsing is reduced by one from the invention according to claim 1 described above. Can.

According to a third aspect of the present invention, in the first aspect of the present invention, the control means stores the abnormality detection count stored data when the dehydration process is omitted and when one dehydration process is completed. In such a case, the maximum number of times the correction rinsing process is performed is equivalent to the case where the maximum number of times of performing the correction rinsing process is set for each rinsing.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) As shown in FIG. 2, a washing and dewatering tub 1 is rotatably disposed in a water receiving tub 2, and a stirring blade 3 is rotatably provided on an inner bottom portion. The mechanical case 4 is provided at the bottom of the water receiving tub 2 and includes a deceleration mechanism for reducing the driving force from the motor 5 and transmitting it to the stirring blade 3 during washing, and a clutch mechanism for switching transmission to the washing and dewatering tub 1 during dehydration. I have. The drainage valve (drainage means) 6 is also used for switching between dehydration and washing at this time. When the drainage valve 6 is driven, the washing water is drained, and the clutch of the mechanical case 4 is switched to enable the dehydration operation. become.

The water level detecting means 7 detects the water level in the washing and dewatering tub 1. The eccentric washing and dewatering tub 1 caused by the deviation of the cloth at the time of dehydration contacts the touch lever 8. To detect imbalance. A water supply valve (water supply means) 9 is for supplying water to the washing and dewatering tub 1, and a washing tub lid 10 is provided on the upper part of the washing and dewatering tub 1 so as to be openable and closable.

The control device 11 is configured as shown in FIG. The rotation speed detection means 12 detects the rotation speed of the motor 5, converts the voltage waveform of the terminal voltage of the phase advance capacitor 13 of the motor 5, and sets the attenuated voltage at the time of off-drive when the motor 5 is turned on and off. Is used to detect the rotational speed. The unbalance detecting means 14 detects the imbalance of the washing and dewatering tub 1 when the washing and dewatering tub 1 comes into contact with the touch lever 8 due to the eccentricity of the washing and dewatering tub 1 caused by the deviation of the cloth during dehydration. It is.

The control means 15 is constituted by a one-chip microcomputer or the like, and includes a timer 15a and a storage means (RAM) 15b as a part of a program, and includes a water level detection means 7, a rotation speed detection means 12, an unbalance detection means. 14 from the control means 1 in advance.
According to the procedure of the program written in the ROM of No. 5,
A load circuit such as a motor 5, a drain valve 6, and a water supply valve 9 is driven via the load driving means 16 to automatically operate a series of washing, rinsing, and dehydrating steps. Reference numeral 17 denotes an AC power supply, and reference numeral 18 denotes a power switch.

As shown in FIG. 9, the operation sequence of the washing machine includes a washing step, a rinsing step, and a dehydrating step. The rinsing step is performed by each of the steps of drainage, dehydration, brake, water supply, and stirring. This is usually repeated twice. Further, the dehydration step includes an intermittent dehydration step and an intermediate dehydration step.

The number of revolutions of the motor 5 in the intermittent dewatering process of the rinsing process gradually increases as shown in FIG. The curve a shows the case of the normal drainage condition, and the curve b shows the case where the drainage condition is poor and bubbles are generated between the water receiving tub 2 and the washing and dewatering tub 1. From this graph, when the drainage condition is poor as indicated by the curve b, the rotation speed of the motor 5 is maintained at the predetermined rotation speed (400 r / min) even after the predetermined time (60 seconds) elapses.
From the above, it is possible to determine the starting failure of the motor 5.

In this case, the control means 15 controls the motor 5 based on the data of the rotation speed detecting means 12 when the imbalance detecting means 14 detects an imbalance abnormality in the washing and dewatering tub 1 during the dewatering process during the rinsing process. When it is determined that the abnormal start-up is abnormal, the number of times the imbalance abnormality and the abnormal start-up are detected is stored in the storage unit 15b. If the number of times of detection of each abnormality is less than N (N ≧ 2), the dehydration is performed. The operation of the stroke was interrupted, and the `` water supply stroke, stirring stroke,
After the operation of the "rinse stroke" is corrected, the operation is returned to the beginning of the original dehydration stroke, and the subsequent operations are continued. If the number of times is N or more, the dehydration stroke is omitted and the process proceeds to the next stroke. It is configured as follows.

The operation of the above configuration will be described with reference to FIGS. FIG. 4 shows a flowchart in the intermittent dehydration step. When the control means 15 enters the intermittent dehydration step, in step 30, first, a timer T1 for measuring a total time of the intermittent dehydration and an on / off time of the motor 5 are measured. Clear timer T2 and go to step 31
To start counting the timer T1 and the timer T2. In step 32, the drain valve 6 is driven, and the clutch of the mechanical case 4 is connected to the washing and spin-drying tub 1.

The next steps 33 to 40 are the on / off control of the motor 5 for intermittent dehydration. In step 33, it is determined whether or not the motor is in the ON mode. Drive the motor 5,
If the timer T2 has passed the predetermined ON time, the motor ON mode is switched to the OFF mode in step 36, and the timer T2 is cleared in step 37.

Returning to step 33, if the motor is not in the motor-on mode, in steps 38 and 39, the motor 5 is stopped for a predetermined off-time. If the timer T2 has passed the predetermined OFF set time, the motor-on mode is switched to the motor-off mode in step 40, and the timer T2 is cleared in step 37.

Step 41 and subsequent steps are an unbalance detection and motor start failure detection flow. In step 41, it is determined whether or not the touch lever 8 is turned on. If the touch lever 8 is turned on, the flow proceeds to an unbalance state determination flow of step 42. Then, it is determined whether or not the state is unbalanced. That is, if the switch is on for a short time of less than 0.3 seconds, it is determined that the state is unbalanced, and the number of unbalance detections U is read from the storage unit (RAM) 15b in step 43.
After the value of the number of unbalance detections U is incremented by one, the value is stored again and the process proceeds to step 48.

Returning to step 42, if the ON time is longer than 0.3 seconds, it is determined that the unbalanced state has not yet been reached, and the routine proceeds to the main processing of step 44 and subsequent steps.

In step 44, the data of the rotation speed detecting means 12 is inputted, and it is determined whether or not the motor rotation speed is 400 r / min or more. It moves to 45. In step 45, it is determined whether the timer T1 measuring the total time of the intermittent dehydration is 120 seconds or more.
If it is longer than the second, the intermittent dehydration is completed and the process is shifted to the dehydration process. If it is less than 120 seconds, the process returns to step 31 and the operation up to step 45 is repeated.

Returning to step 44, if the motor rotation speed is 4
If it is less than 00 r / min, the process proceeds to a startup failure determination flow in step 46. In step 46, the timer T1
It is determined whether or not the time for which the motor 5 can be sufficiently started, for example, 60 seconds or more has elapsed. If it is less than 60 seconds, the motor startup is determined to be normal, and the process proceeds to step 45.

If 60 seconds or more have elapsed, the motor 5
Is determined to be in the startup failure state, and in step 47, the startup failure abnormality count B is read from the storage means (RAM) 15b, and the value of the startup failure abnormality count B is incremented by 1 and then stored again.

Step 48 and subsequent steps perform common processing for both the case where an imbalance is detected and the case where a motor startup failure is detected. In step 48, the value of the unbalance detection frequency U and the value of the motor startup failure frequency B In the storage means (R
AM) 15b, and it is determined whether the sum (U + B) is equal to or greater than a set value N (N is a natural number of 2 or more).
If it is less than the number of times, the intermittent dewatering process is terminated halfway, and the process shifts to the modified rinsing process. If it is N times or more, the intermittent dewatering process is terminated halfway, and in step 49, the next dewatering process is omitted and the process shifts to the brake process. This allows
The number of times of performing the correction rinsing will be limited to (N-1) at the maximum.

As shown in FIG. 5, the correction rinsing step includes a water supply step, a stirring step, and a drainage step. When the correction rinsing process is started, first, the water supply valve 9 is driven in step 50, and the water supply is continued until the set water level is reached from the data of the water level detection means 7 in step 51. When the water level reaches the set water level, the water supply process ends, and the process proceeds from step 52 to the stirring process.

In the stirring process, first, at step 52, the timer T1 for measuring the total time of the stirring process is cleared, and then, at step 53, the motor 5 is driven to rotate clockwise, stop, and rotate counterclockwise. Stirring)
I do. Next, in step 54, the timer T1 is counted, and in step 55, the motor reversing drive operation is repeated until this T1 has passed for a predetermined time (two minutes). After this time has elapsed, the stirring process is completed and the process shifts to the drainage process. I do.

In the drainage process, first, the timer T1 for measuring the additional drainage time in step 56 is cleared, and in step 57 the drainage valve 6 is driven to drain the water in the washing and dewatering tub 1. Next, the draining operation (driving of the drain valve 6) is continued until the reset water level is reached according to the data of the water level detecting means 7 in step 58, and after the reset water level is detected, the timer T1 is counted in step 59. Then, in step 60, a certain time (1
Minute), the drain valve is driven, and when this time elapses, the drain stroke ends, and the process returns to the beginning of the intermittent dewatering stroke before shifting to the modified rinsing stroke.

In the modified rinsing process (water supply process, stirring process, draining process), when the imbalance is abnormal, the cloth is loosened by the stirring process, and when the motor is not started properly, the cloth is included in the laundry. The diluted detergent is diluted in water,
Bubbles between the water receiving tub 2 and the washing / dewatering tub 1 are removed, and in the intermittent dewatering process similar to the previous time, the unbalanced state or the motor start failure state is corrected.

Here, N in step 48 of FIG.
= 2, when rinsing is performed twice as shown in FIG. 9, when the imbalanced state or the motor starting failure state occurs, the rinsing is considered to be at most 3 in consideration of one correction rinsing step. After that, the rinsing operation can proceed to the end of the rinsing process without increasing the number of times of rinsing.

(Embodiment 2) The control means 15 shown in FIG.
"Waterfall rinse" that supplies water while dehydrating at low speed during the rinsing process
In the dehydration process performed before the stroke, when the imbalance detecting means 14 detects an imbalance abnormality of the washing and dewatering tub 1 or when it is determined from the data of the rotation speed detecting means 12 that the motor 5 is not properly activated. , Suspending the operation of the dehydration process, returning to the beginning of the original dehydration process through the operation of the correction rinse process of `` water supply process, stirring process, drainage process '', and continuing the subsequent operations, and following the dehydration process The "waterfall rinsing" process is omitted. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. Since the operation up to step 47 in FIG. 4 of the first embodiment is the same, description thereof will be omitted, and step 48 and thereafter (A in FIG. 4) will be described from step 70.

First, in step 70 and subsequent steps, both the case where an imbalance is detected and the case where a motor startup failure is detected are common. In step 70, it is determined whether or not the waterfall rinsing process is in a rinsing sequence, and the waterfall rinsing is performed. If there is no stroke, the process proceeds to step 72. If there is a waterfall rinsing stroke, it is determined in step 71 whether the waterfall rinsing stroke has already been operated.

If the waterfall rinsing process has already been performed, the process proceeds to step 73. If the waterfall rinsing process has not been performed, the process proceeds to step 73 with the waterfall rinsing process omitted in step 72. As a result, if the imbalance detection or the motor startup failure is detected during the intermittent dehydration process before the waterfall rinsing, the operation of the waterfall rinsing process is stopped.

Next, in step 73 and subsequent steps, the value of the unbalance detection frequency U and the value of the motor start failure frequency B are read out from the storage means (RAM) 15b in the same flow as in FIG. ) Is greater than or equal to a set value N (N is a natural number of 2 or more), and if less than N times, the intermittent dehydration process is terminated halfway and the process shifts to the modified rinsing process. If N times or more, end the intermittent dehydration process halfway,
Further, in step 74, the next dehydration step is omitted, and the process proceeds to the brake step.

Here, N in step 73 in FIG.
= 2, and in the case of a sequence having a waterfall rinsing stroke as shown in FIG. 10, when an imbalanced state or a poor motor start state occurs, the correction rinsing stroke is considered to be one rinsing, and at the maximum, rinsing is performed. Is two times, and the rinsing process can proceed to the end of the rinsing process without increasing the number of times of rinsing. That is, if there is a waterfall rinsing process,
The number of times of rinsing can be reduced by one as compared with the normal rinsing as shown in FIG.

(Embodiment 3) The control means 15 shown in FIG.
The storage data of the number of times of abnormality detection is cleared when the dehydration process is omitted and when one dehydration process is completed. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIGS. It should be noted that when the dehydration step is omitted, Step 47 in FIG.
Since the operations up to this point are the same, a description thereof will be omitted, and step 48 and subsequent steps (A in FIG. 4) will be described from step 80 with reference to FIG.

First, at step 80, the value of the unbalance detection frequency U and the value of the motor start failure frequency B are stored in the storage means (R
AM) 15b, and it is determined whether the sum (U + B) is equal to or greater than a set value N (N is a natural number of 2 or more).
If it is less than the number of times, the intermittent dewatering process is terminated halfway, and the process shifts to the modified rinsing process. If N times or more, the intermittent dehydration process is terminated halfway, the next dehydration process is omitted in step 81, and the unbalance detection frequency U is determined in step 82.
And the value of the motor start failure frequency B are cleared, and the process proceeds to the brake stroke.

Next, the case where one dewatering process is completed will be described with reference to FIG. In the rinsing process, after the intermittent dewatering process is completed and the process proceeds to the intermediate dewatering process, first, at step 83, the timer T1 for measuring the total time of the dewatering process is cleared, and then, at step 84, the motor 5 and the drain valve 6 are discharged. To continue the dehydration operation.

Next, in step 85, the timer T1 is counted, and in step 86, the timer T1 is set for a predetermined time (two minutes).
Until elapse, continue the dehydration operation from step 84,
After the elapse of this time, the values of the unbalance detection frequency U and the motor start failure frequency B are cleared in step 87, the dehydration process is completed, and the process shifts to the brake process.

Here, when the dehydration process is omitted or the dehydration process is terminated by the two flows of FIGS. 7 and 8, the values of the unbalance detection frequency U and the motor start failure frequency B are cleared. The value of N can be set for each rinse. Therefore, although the number of times of the correction rinsing is increased as compared with the case of the first embodiment, the rinsing rate (dilution rate) can be sufficiently secured.

[0047]

As described above, according to the first aspect of the present invention, the motor for driving the washing and dewatering tub and the stirring blade, the water supply means for supplying water to the washing and dewatering tub, Drainage means for draining water in the washing and dewatering tub, water level detecting means for detecting the water level, unbalance detecting means for detecting the unbalanced state of the washing and dewatering tub, and rotation for detecting the number of rotations of the motor Number detection means, storage means for storing the number of times of abnormality detection, the water level detection means, unbalance detection means, rotation number detection means as input, the motor,
Control means for automatically driving a series of washing, rinsing, and dehydration steps by driving water supply means and drainage means, wherein the control means controls the washing and dehydration tub by the unbalance detection means during the dehydration step during the rinsing step. When an imbalance abnormality is detected, or when it is determined that the motor has a start failure based on the data of the rotation speed detection unit, the number of times the unbalance abnormality and the start failure are detected is stored in the storage unit. If the addition of the number of times of detection is less than N (N ≧ 2), the operation of the dehydration step is interrupted, and the operation of the modified dewatering step of “water supply step, agitation step, and drainage step” is started, and then the original dehydration step is started. And the subsequent operation is continued, and if the number of times is N or more, the dehydration process is omitted and the process is shifted to the next process. 1) Since only one “correction rinsing” operation is performed, if N = 2, for example, the total number of times of rinsing is increased only once, and the number of times of rinsing is not significantly increased, thereby wasting water resources. And reduce
The operation can be performed up to the final dehydration step without significantly extending the operation time, and the sequence can be prevented from being stopped during the rinsing step.

According to the second aspect of the present invention, the control means controls the washing by the unbalance detecting means in the dehydration step performed before the “fall rinsing” step of supplying water while performing low-speed dehydration during the rinsing step. If an imbalance abnormality in the dehydration tub is detected, or if it is determined that the motor is not properly started due to data from the rotation speed detection means, the operation of the dehydration process is interrupted and the `` water supply process, stirring process, and drain process '' are corrected. After returning to the beginning of the dehydration process after the rinsing operation, the following operations are continued and the `` waterfall rinsing '' process that is performed next to the dehydration process is omitted. When the “rinsing” operation is performed, the “waterfall rinsing” step is omitted, so that the total number of times of rinsing can be reduced by one from the invention described in claim 1, and in particular, water saving is improved. It can be.

According to the third aspect of the present invention, the control means clears the stored data of the number of times of abnormality detection when the dehydration process is omitted and when one dehydration process is completed. With this configuration, the maximum number of times the correction rinsing process is performed is set for each rinsing,
Although the total number of times of rinsing is increased as compared with the first aspect of the present invention, rinsing performance (dilution ratio) can be sufficiently ensured.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control device of a washing machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the washing machine provided with the control device of the washing machine;

FIG. 3 is a time chart showing the number of rotations of a motor in an intermittent dehydration process of the washing machine controlled by the control device of the washing machine.

FIG. 4 is an operation flowchart in an intermittent dehydration process of the control device of the washing machine.

FIG. 5 is an operation flowchart of the control device of the washing machine in a modified rinsing process.

FIG. 6 is an operation flowchart of a main part in an intermittent dehydration process of a control device of a washing machine according to a second embodiment of the present invention.

FIG. 7 is an operation flowchart of a main part in an intermittent dehydration process of a control device of a washing machine according to a third embodiment of the present invention.

FIG. 8 is an operation flowchart of a main part after an intermittent dehydration process of the control device of the washing machine.

FIG. 9 is a diagram showing an example of a series of steps of the washing machine.

FIG. 10 is a diagram showing another example of a series of steps of the washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing and dehydration tank 3 Stirrer blade 5 Motor 6 Drain valve (drain means) 7 Water level detection means 9 Water supply valve (water supply means) 12 Revolution number detection means 14 Unbalance detection means 15 Control means 15b Storage means

Claims (3)

[Claims] A motor for driving the washing and dewatering tub and the stirring blade; a water supply means for supplying water to the washing and dewatering tub; a drainage means for draining water from the washing and dewatering tub; and detecting a water level. Water level detection means, unbalance detection means for detecting an unbalanced state of the washing and dewatering tub, rotation number detection means for detecting the rotation number of the motor, storage means for storing the number of times of abnormality detection, and water level detection Means, unbalance detection means, rotation speed detection means as input, said motor,
Control means for automatically driving a series of washing, rinsing, and dehydration steps by driving water supply means and drainage means, wherein the control means controls the washing and dehydration tub by the unbalance detection means during the dehydration step during the rinsing step. When an imbalance abnormality is detected, or when it is determined that the motor has a start failure based on the data of the rotation speed detection unit, the number of times the unbalance abnormality and the start failure are detected is stored in the storage unit. If the addition of the number of times of detection is less than N (N ≧ 2), the operation of the dehydration step is interrupted, and the operation of the modified dewatering step of “water supply step, agitation step, and drainage step” is started, and then the original dehydration step is started. The control device for a washing machine is configured such that the operation is continued after returning to the above, and when the number of operations is N or more, the dehydration process is omitted and the process is shifted to the next process. 2. The method according to claim 1, wherein the control means detects an imbalance abnormality in the washing and dewatering tub by the unbalance detection means in a dehydration step performed before a “waterfall rinsing” step of supplying water while performing low-speed dehydration during the rinsing step. Or, when it is determined that the motor is not properly started due to the data of the rotation speed detecting means, the operation of the dehydration process is interrupted, and the `` water supply process, the stirring process,
Claims configured to return to the beginning of the original dehydration step through the operation of the modified rinsing step of the `` drainage step '', continue the subsequent operation, and omit the `` waterfall rinsing '' step performed after the dehydration step. The control device for a washing machine according to claim 1. 3. The control device according to claim 1, wherein the control unit clears the storage data of the number of times of abnormality detection when the dehydration process is omitted and when one dehydration process is completed.
A control device for a washing machine according to the above.