JP2000024364A - Control device of washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sense a malfunction of a drainage means within a short period of time from the starting of a drainage step to check the cause of the abnormality according to the contents of a report, thereby rapidly repairing a defect, in a control device of a washing machine wherein a series of a washing, rinsing, and dehydrating steps are automatically performed. SOLUTION: Water is fed into a spinning tub by means of an electromagnetic feed water valve 6, the water level in the spinning tub is sensed by a water level sensing means 8, the fed water is discharged by means of a drainage valve which is opened and closed by driving a drainage geared motor 9, and the open/closure conditions of the drainage valve is sensed by a drainage valve condition switch 16. A control means 13 automatically effects a series of a washing, rinsing, and dehydration steps, and in the case that, in the drainage step, an open state of the drainage valve can not be sensed by the switch 16 even if the motor 9 is driven for a predetermined time, it is judged that a failure of the motor 9 has occurred, so that the failure is reported by a display means 21 or a report means 22.

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, this type of washing machine has been configured as shown in FIG. Hereinafter, the configuration will be described.

[0003] As shown in the figure, a washing and dewatering tub 1 has a stirring blade 2 rotatably provided at the bottom. The clutch switching mechanism 3 includes a speed reduction mechanism, and transmits the power of the motor 4 to the agitating blade 2 at a reduced speed during washing, and to the washing and dewatering tub 1 during dehydration. At this time, the switching from the stirring blade 2 to the washing / dewatering tub 1 is performed by driving a clutch switching geared motor (hereinafter referred to as a clutch GM) 5.

The electromagnetic water supply valve 6 supplies water to the washing / dewatering tub 1 and the water tub 7. The water level detecting means 8 detects the water level by converting the water pressure at a connection portion below the water tank 7 into an electric frequency. In addition, a drain geared motor (hereinafter, drain G)
The drain valve 10 is opened at 9 and the water in the water tub 7 is drained out of the washing machine.

The control device 11 includes a motor 4, a clutch GM
5. The operation of the electromagnetic water supply valve 6 and the drainage GM 9 is controlled, and a series of washing, rinsing, and dewatering processes are automatically operated.
The washing operation of this type of washing machine includes a water supply process and a stirring process, and a rinsing process includes a drainage process, an intermittent dehydration process, a dehydration process, a brake process, a water supply process, and a stirring process. Is repeated once or twice. In the dewatering process, a drain process, an intermittent dewatering process, a dewatering process, and a brake process are performed.

In the control of the drain GM 9 during the drain stroke of the control device 11 in FIG. 10, the drain GM 9 is always driven to drive a drain valve opening / closing rod (not shown) connected to the drain valve 10 to the drain valve 10 and the drain valve. The drain valve 10 is opened by pulling against the force of a spring (not shown) connected to the connecting rod. In the control of the drain GM9 during the water supply process, the drive of the drain GM9 is stopped, and the drain valve 10 is closed by the force of the spring.

[0007]

In such a conventional structure, when the drainage valve GM9 malfunctions during the drainage process and the drainage valve 10 cannot be opened, the water in the washing and dewatering tub 1 is discharged for a predetermined time. Even after the lapse of time (about 5 minutes), the water level detecting means 8 detected that the water level was higher than the minimum water level and found that the drainage was defective, and reported the abnormality. This drainage abnormality is provided assuming that the user forgets to drop the drainage hose, clogs the lint in the drainage hose, and the like.

If the drain GM 9 is continuously operated during the water supply process and the drain valve 10 is always open, the water level is detected even after the water in the washing and dewatering tub 1 elapses for a predetermined time (about 15 minutes). Since the water level does not exceed the minimum water level, the means 8 detects that the water supply is inadequate and notifies the abnormality. This water supply abnormality is provided on the assumption that the user forgets to open the tap.

[0009] Such a drainage abnormality and a water supply abnormality are intended to have the user remove the cause of the abnormality.

[0010] However, in any of the above cases, the user cannot remove the cause of the abnormality due to the failure of the drainage GM 9, resulting in a difference between the contents of the abnormal display and the cause, which is a problem.

The present invention solves the above-mentioned conventional problems, and detects a malfunction of the drainage means in a short time from the start of the drainage process, matches the cause of the abnormality with the content of the notification, and clarifies the cause of the abnormality. The aim is to allow quick repairs.

[0012]

According to the present invention, in order to achieve the above object, water is supplied to a washing and dewatering tub by a water supply means, and a water level in the washing and dewatering tub is detected by a water level detecting means. Water supplied by a drain valve that opens and closes by driving the means is drained, and the open / close state of the drain valve is detected by a drain valve state switch. The control means automatically operates a series of washing, rinsing, and dehydration steps.During the drainage step, the drain valve state switch does not detect the open state of the drain valve even if the drain means is driven for a predetermined time. It is configured such that it is determined that the means is out of order, and the display means or the notification means notifies the abnormality.

[0013] This makes it possible to detect a malfunction of the drainage means in a short time (about 20 seconds) from the start of the drainage process, to match the cause of the abnormality with the content of the notification and to clarify the cause of the abnormality. Repairs can be made quickly.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a water supply means for supplying water into a washing and dewatering tub, a water level detecting means for detecting a water level in the washing and dewatering tub, and a drainage means. A drain valve that opens and closes by driving the means to drain the supplied water, a drain valve state switch that detects the open / close state of the drain valve, a display unit that performs a display operation, and a notification unit that performs a notification operation with a notification sound. Control means for automatically operating a series of washing, rinsing, and dehydration steps, wherein the control means can detect the open state of the drain valve by the drain valve state switch even when the drain means is driven for a predetermined time in the drain step. If not,
It is configured that the drainage means is determined to be faulty, and the display means or the notification means notifies the abnormality, and the malfunction failure of the drainage means is detected for a short time (2 hours) from the start of the drainage process.
0 seconds), an error is displayed or reported in accordance with the cause of the abnormality (malfunction of the drainage means), the user can be clearly notified of the abnormal part, and repair can be performed quickly. it can.

According to a second aspect of the present invention, in the first aspect of the present invention, when the drain valve state switch detects that the drain valve is open during the water supply process, the control means drives the drain means for a predetermined time. If the closed state of the drain valve cannot be detected by the drain valve state switch even when the drain unit is driven, the drain unit is determined to be faulty, and an abnormality is notified by the display unit or the notification unit. In the water supply process, the malfunction of the drainage means can be detected in a short time, and the abnormality display or notification is made in accordance with the cause of the abnormality (malfunction of the drainage means). It can give a clear notice and allow for quick repairs.

According to a third aspect of the present invention, in the first aspect of the present invention, when the drainage means repeats a drive-stop cycle a predetermined number of times in the drainage stroke,
It is configured to judge that the drainage means is out of order, and to notify the abnormality by the display means or the notification means.The continuous operation failure of the drainage means can be detected in the drainage process, and the abnormality is displayed or notified to use. Can clearly inform the user of the abnormal part (failure of the drainage means).

According to a fourth aspect of the present invention, in the first aspect of the present invention, there is provided a power-on switch for supplying power, and the control means controls the state of the drain valve immediately after being energized by the power-on switch. When the opening of the drain valve is detected by the switch, the drain unit is driven, and when the closed state of the drain valve cannot be detected even after the lapse of a predetermined time, it is determined that the drain unit has failed, and the display unit is determined. Or, it is configured to notify the abnormality by the notification means. Immediately after pressing the power-on switch, the malfunction failure of the drainage means can be detected in a short time, and the abnormality display or notification informs the user of the abnormal part ( Failure of the drainage means).

[0018]

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

(Embodiment 1) As shown in FIG. 2, the control device 12 controls the operation of a motor 4, a clutch GM 5, an electromagnetic water supply valve (water supply means) 6, and a drain GM (drainage means) 9, and performs a series of operations. The washing, rinsing, and dehydration processes are automatically operated.
It is configured as shown in FIG.

The control means 13 is usually constituted by a one-chip microcomputer or the like, and includes a timer for measuring time and a storage means (RAM) as a part of the program. The control means 13 is provided with a motor 3, a clutch GM5, an electromagnetic water supply valve 6, a drainage GM9, and a power relay 1 for holding the supplied AC power through a power switching means 14 constituted by a bidirectional thyristor or a relay.
5 and the like are controlled.

A drain valve status switch 16 for detecting the open / close state of the drain valve is connected to the drain GM 9 and is input to the control means 13. Reference numeral 17 denotes a motor starting capacitor, and reference numeral 18 denotes a power-on switch for supplying an AC power supply 19.

The input setting means 20 is for inputting a setting course required by the user, start of operation, and the like, and is input to the control means 13. The display means 21 displays the contents set by the input setting means 20, the remaining time until the end of operation, and the like. The notifying unit 22 performs a notifying operation by a notifying sound such as a buzzer, and outputs a confirmation sound that the input setting unit 20 has received a switch and a notification of the end of the operation.

The input setting means 20, as shown in FIG.
A course setting switch 20a for setting a "standard" course, a "speedy" course, a "blanket" course, a "wool" course, etc. having different water levels, washing times, rinsing times and dehydrating times in a washing process; A start / pause switch 20b for inputting a pause, a water level setting switch 20c for individually setting a water level, a washing time, a number of rinses, and a dehydration time, a washing time setting switch 20d, a rinse number setting switch 20e, and a dehydration time setting switch. 20f, a power-on switch 18 and a power-off switch 20g for shutting off.

The display means 21 includes a course setting switch 20
a, a stroke display unit 21a for displaying the stroke and the operation state set by a, a course display unit 21b for displaying the course set by the switch, a water level setting switch 20c,
A water level display section 21c, a washing time display section 21d, and a rinsing number display for displaying the water level, the rinsing time, the number of rinsing times, and the dehydrating time individually set by the rinsing time setting switch 20d, the rinsing number setting switch 20e, and the dehydrating time setting switch 20f. It comprises a section 21e, a dehydration time display section 21f, and a remaining time display section 21g for displaying the remaining time until the end of operation.

As shown in FIG. 4, the drain valve 10 is connected to an opening / closing rod 9a and further to a drain GM cam 9b. The drainage GM cam 9b is connected to the internal drainage GM9. When the drainage GM9 is driven to rotate at a constant speed (the rotation speed depends on the power supply frequency), the drainage GM cam 9b rotates, and the open / close rod 9a is turned. The elliptical operation is performed, and the drain valve 10 opens and closes. The drainage GM9 is provided with a mechanism for holding the rotation position when the drive is stopped.

A drain valve state switch 16 is in contact with the drain GM cam 9b. Since the drain GM cam 9b has a part of a circular shape depressed, the drain valve state switch 16 is normally turned on. However, when the drainage GM 9 is driven and the cam depression position of the drainage GM cam 9b comes to the position of the drainage valve state switch 16, the drainage valve state switch 16 is turned off. At this time, the pull-out of the opening / closing bar 9a becomes the lowest, and the drain valve 10 is in a closed state.

Therefore, the relationship between the opening and closing of the drain valve 10 and the on / off state of the drain valve state switch 16 is as shown in FIG. 5. When the drain valve 10 is closed, the drain valve state switch 16 is switched from on to off. Drain GM9 to the switching position
On the contrary, in order to open the drain valve 10, the drain GM 9 may be driven for a period from the position where the drain valve state switch 16 switches from off to on to the time when the opening and closing rod 9 a is pulled out to the longest. .

The operation of the control means 11 in the above configuration will be described with reference to the flowchart of FIG. Generally, when the user starts the operation of the washing machine, the user puts the laundry in the washing / dewatering tub 1, turns on the power switch 18, and selects a desired “course” or the like with the input setting means 20. And
Press the start / pause switch 30b. Thus, the washing operation is started, and the washing, rinsing, and dehydrating operations are sequentially performed.

The flow chart of FIG. 6 is for the draining step of the rinsing step or the dewatering step. First, in step 31, the drainage GM 9 is driven, and in step 32, it is determined whether the drain valve state switch 16 has changed from off to on. I do. If the drain valve 10 has changed from off to on, it is determined that the drain valve 10 has shifted from the closed state to the open state, and the process proceeds to step 33, where the drain GM 9 is discharged at step 34 until four seconds have elapsed since the drain valve state switch 16 was turned on. Continue driving.

If four seconds have elapsed, it is determined that the drain valve 10 has been fully opened, and the drain GM 9 is stopped in step 35, and the process proceeds to step 36. In step 36, the process waits until the water level becomes lower than the reset water level (lowest water level). When the water level becomes lower than the reset water level, the process proceeds to step 37, and the time is further delayed by 30 seconds to drain the remaining water. After 30 seconds, the draining process is completed, and the process proceeds to the next intermittent dewatering process.

At step 32, the drain valve state switch 1
If 6 does not change from off to on, it is determined in step 38 whether or not 20 seconds have elapsed. If less than 20 seconds, the process returns to step 31 to continue driving the drain GM 9. That is, the operations of steps 31, 32, and 38 are looped for 20 seconds until the drain valve state switch 16 detects from off to on.

If 20 seconds have elapsed at step 38,
In step 39, the drainage GM9 is stopped, and in step 40
Is judged to be defective in the drainage GM9, and an abnormality is displayed on the display means 21 or an abnormality is notified by the notification means 22.

As described above, according to this embodiment, the drain GM 9
Operation failure for a short time (20 seconds) from the start of the drainage process
, An abnormality is displayed or notified in accordance with the cause of the abnormality (malfunction of the drainage GM 9), and the user can be clearly notified of the abnormal part, so that repair can be quickly performed.

In this embodiment, the abnormality determination time in step 38 is set to 20 seconds, but this time may be any number of seconds as long as it is equal to or longer than the time when the drain GM cam 9b makes one round.

(Embodiment 2) The control means 13 shown in FIG.
When the drain valve status switch 16 detects the opening of the drain valve 10 during the water supply process, the drain valve GM9 is driven, and the drain valve 10 is closed by the drain valve status switch 16 even if the drain GM 9 is driven for a predetermined time (for example, 20 seconds). If the status cannot be detected,
It is configured that it is determined that the drainage GM 9 is out of order and the display unit 21 or the notification unit 22 notifies the abnormality. Other configurations are the same as those in the first embodiment.

The operation of the control means 13 in the above configuration will be described with reference to the flowchart of FIG. The flowchart of FIG. 7 is for the water supply process of the washing process or the rinsing process after the washing operation is started. First, in step 41, it is determined whether or not the drain valve status switch 16 is in the off state. If the drain valve 10 is closed, the flow proceeds to step 45 and the electromagnetic water supply valve 6 continues to be driven in step 46 until the water level reaches the set water level. When the water level reaches the set water level, the flow shifts to the next stirring step.

At step 41, the drain valve state switch 1
If the switch 6 is on, the drain valve 10 is open, so the drain GM 9 is driven in step 42, and in step 43, it is determined whether the drain valve state switch 16 has changed from on to off. When it changes from on to off, it is determined that the drain valve 10 has shifted from the open state to the closed state,
In step 44, the drainage GM 9 is stopped, and thereafter, the drive operation of the electromagnetic water supply valve 6 in steps 45 and 46 is performed.

In step 43, the drain valve state switch 1
If step 6 does not detect the off state from on, step 47
It is determined whether or not 20 seconds have elapsed. If the time is less than 20 seconds, the flow returns to step 42 to continue driving the drain GM9. That is, Step 42, Step 43, and Step 47 are performed until the drain valve state switch 16 detects from ON to OFF.
Is looped for 20 seconds.

If 20 seconds have passed in step 47,
In step 48, the drainage GM9 is stopped, and in step 49
Is determined to be defective in the drainage GM9, and an abnormality is displayed on the display means 21 or an abnormality is notified by the notification means 22.

(Embodiment 3) The control means 13 shown in FIG.
When the drive-stop cycle of the drainage GM 9 is repeated a predetermined number of times in the drainage process, it is determined that the drainage GM 9 has failed, and the display unit 21 or the notification unit 22 notifies the abnormality. Other configurations are the same as those in the first embodiment.

The operation of the control means 13 in the above configuration will be described with reference to the flowchart of FIG. The flowchart in FIG. 8 is for the draining process of the rinsing process or the dehydrating process after the washing operation is started. First, the drainage GM 9 is driven in step 50, and the drain valve state switch 16 is turned on from step 51 in step 51. It is determined whether or not has changed. When the drain valve 10 is changed from off to on, it is determined that the drain valve 10 has shifted from the closed state to the open state, and the process proceeds to step 52. The drain GM 9 is discharged in step 53 until four seconds have elapsed since the drain valve state switch 16 was turned on. Continue driving.

At step 51, the drain valve state switch 1
If 6 does not change from off to on, it is determined in step 54 whether or not 20 seconds have elapsed. If less than 20 seconds, the flow returns to step 50 to continue driving the drain GM9. That is, Step 50, Step 51, and Step 54 are performed until the drain valve state switch 16 detects from off to on.
Is looped for 20 seconds.

If 20 seconds have passed in step 54,
In step 55, the drainage GM9 is stopped, and in step 56
Is determined to be defective in the drainage GM9, and an abnormality is displayed on the display means 21 or an abnormality is notified by the notification means 22.

At step 52, the drain valve state switch 1
If 4 seconds have elapsed since the turning on of the drain 6, it is determined that the drain valve 10 has been sufficiently opened, and the drain GM 9 is stopped in step 57. Further, at step 58, the drain valve status switch 16
Is determined to be in the ON state, and if it is in the ON state, the drain valve 10 is in the open state, and the process proceeds to step 59, and the steps 58 and 59 are performed until the water level becomes lower than the reset water level (lowest water level). The drain valve status switch 16 is monitored repeatedly.

If the water level falls below the reset water level in step 59, the flow shifts to step 60 to further delay the time by 30 seconds in order to drain the remaining water. After 30 seconds, the draining process is completed, and the process proceeds to the next intermittent dewatering process.

At step 58, the drain valve state switch 1
If the drain valve 6 is turned off, that is, if the drain valve 10 is closed for some reason, the process proceeds to step 61 and the repetition counter that stores the number of times this step 61 is reached is counted up. Subsequently, step 62
It is determined whether or not the value of this repetition counter is equal to or greater than eight. If the value is less than eight, the process returns to step 50, and the operation of opening the drain valve 10 from step 51 onward is repeated.

If the number of times has reached eight or more, it is determined in step 63 that the drainage GM 9 is defective, and an abnormality is displayed on the display means 21 or an abnormality is notified by the notification means 22.

(Embodiment 4) The control means 13 shown in FIG.
When the drain valve status switch 16 detects the opening of the drain valve 10 immediately after the power is turned on by the power switch 18, the drain GM 9 is driven for a predetermined time (for example, 20 seconds).
If the closed state of the drain valve 10 cannot be detected even after the lapse of time, it is determined that the drain GM 9 has failed, and the display means 21
Alternatively, the abnormality is notified by the notification means 22. Other configurations are the same as those in the first embodiment.

The operation of the control means 13 in the above configuration will be described with reference to the flowchart of FIG. The flowchart of FIG. 9 is a flowchart immediately after the user puts laundry into the washing / dewatering tub 1 and turns on the power-on switch 18 when the user starts the operation of the washing machine.
It is determined whether or not the drain valve state switch 16 is in the off state. If the switch is off, the drain valve 10 is closed, so the flow shifts to step 68 and shifts to a routine for waiting for a start / stop switch.

If the start / pause switch 20b is pressed, the operation shifts to the washing operation. If not, the flow returns to step 64 to monitor the drain valve status switch 16. If the drain valve state switch 16 is on in step 64, the drain valve 10 is open, so the drain GM 9 is driven in step 65, and whether the drain valve state switch 16 has changed from on to off in step 66. Determine whether

When the state changes from on to off, the drain valve 1
It is determined that the state has shifted from the open state to the closed state, and the drainage GM 9 is stopped in step 67, and thereafter, the processing shifts to a routine of step 68 for waiting for a start / pause waiting switch.

At step 66, the drain valve state switch 1
If No. 6 does not detect the On to Off state, then Step 6
At 9 it is determined whether or not a predetermined time (20 seconds) has elapsed.
If the time is less than 0 second, the flow returns to step 65 to continue driving the drainage GM9. That is, Step 65, Step 6 until the drain valve status switch 16 detects from ON to OFF.
6. Loop the operation of step 69 for 20 seconds.

If 20 seconds have elapsed at step 69, the drainage GM9 is stopped at step 70, and it is determined at step 71 that the drainage GM9 is defective. At 22, an abnormality is notified.

[0054]

As described above, according to the first aspect of the present invention, a water supply means for supplying water to the washing and dewatering tub, and a water level detection for detecting the water level in the washing and dewatering tub. Means, a drain valve that opens and closes by driving the drain means to drain the supplied water, a drain valve state switch that detects the open / close state of the drain valve, a display unit that performs a display operation, and a notification operation by a notification sound. And a control means for automatically operating a series of washing, rinsing, and dewatering steps. The control means operates the drainage means for a predetermined time in the drainage step to open the drain valve by the drain valve state switch. If the state cannot be detected, it is determined that the drainage means is out of order, and the display means or the notification means is configured to notify the abnormality. (20 seconds) Can fault display or notification, it is possible to clearly inform the abnormal region to the user,
Repairs can be made quickly.

According to the second aspect of the present invention, when the drain valve state switch detects the opening of the drain valve during the water supply process, the control means drives the drain means and drives the drain means for a predetermined time. When the closed state of the drain valve cannot be detected by the drain valve status switch, it is determined that the drain unit is out of order and the display unit or the notification unit notifies the abnormality. Malfunction failures can be detected in a short time to display or report an abnormality, the user can be clearly notified of the abnormal part, and repair can be quickly performed.

According to the third aspect of the present invention, the control means determines that the drainage means has failed if the drainage means repeats the drive-stop cycle a predetermined number of times in the drainage stroke. Since the display means or the notification means is configured to notify the abnormality, the continuous operation failure of the drainage means can be detected in the drainage process, and by displaying or notifying the abnormality, the user can clearly identify the abnormal part (the failure of the drainage means). I can let you know.

According to the fourth aspect of the present invention, there is provided a power-on switch for supplying power, and the control means opens the drain valve by a drain valve state switch immediately after the power is turned on by the power-on switch. Is detected, the drainage means is driven, and if the closed state of the drainage valve cannot be detected even after the lapse of a predetermined time, it is determined that the drainage means has failed, and the display means or the notification means reports an abnormality. As a result, the malfunction of the drainage unit can be detected in a short time immediately after the power-on switch is pressed, and the abnormal display or notification informs the user of the abnormal part (failure of the drainage unit).
Can be clearly communicated.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a control device of a washing machine according to first to fourth embodiments 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 front view of input means and display means of the control device of the washing machine.

FIG. 4 is a perspective view of a drain valve and a drain geared motor controlled by the control device of the washing machine.

FIG. 5 is a characteristic diagram showing a relationship between a drain valve controlled by the control device of the washing machine and a drain valve state switch.

FIG. 6 is an operation flowchart of a main part of the control device of the washing machine according to the first embodiment of the present invention;

FIG. 7 is an operation flowchart of a main part of the control device of the washing machine according to the second embodiment of the present invention;

FIG. 8 is an operation flowchart of a main part of a control device for a washing machine according to a third embodiment of the present invention.

FIG. 9 is an operation flowchart of a main part of a control device for a washing machine according to a fourth embodiment of the present invention.

FIG. 10 is a cross-sectional view of a washing machine provided with a conventional washing machine control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing tank and dehydration tank 6 Electromagnetic water supply valve (water supply means) 8 Water level detection means 9 Drain geared motor (Drainage means) 10 Drain valve 13 Control means 16 Drain valve status switch 21 Display means 22 Notification means

Continued on the front page (72) Inventor Hisashi Hagiwara 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.F-term (reference) LB31 LC02 LC28 LC29 LC30 MA02 MA06 MA07 MA08

Claims (4)

[Claims] 1. A water supply means for supplying water into a washing and dewatering tub, a water level detecting means for detecting a water level in the washing and dewatering tub, and a drainage for opening and closing by driving a drainage means to drain the supplied water. A valve, a drain valve state switch for detecting the open / close state of the drain valve, a display unit for performing a display operation, a notification unit for performing a notification operation by a notification sound, and a control for automatically operating a series of washing, rinsing, and dehydrating processes. The control means determines that the drainage means has failed if the drainage valve state switch does not detect the open state of the drainage valve even after the drainage means has been driven for a predetermined time during the drainage process. And a control device for the washing machine configured to notify the abnormality by the display means or the notification means. 2. The control means, when the drain valve status switch detects that the drain valve is open during the water supply process, drives the drain means, and keeps the drain valve closed by the drain valve status switch even if the drain means is driven for a predetermined time. 2. The control device for a washing machine according to claim 1, wherein when the is not detected, it is determined that the drainage means is out of order and the display means or the notification means notifies the abnormality. 3. The control means determines that the drainage means has failed when the drainage means repeats a drive-stop cycle a predetermined number of times during the drainage stroke, and notifies the display means or the notification means of an abnormality. The control device for a washing machine according to claim 1, wherein the control device comprises: 4. A power-on switch for supplying power, wherein the control means drives the drain means when the drain valve state switch detects the opening of the drain valve immediately after the power-on switch is energized; 2. The washing apparatus according to claim 1, wherein when the closed state of the drain valve is not detected even after the lapse of a predetermined time, the drain unit is determined to be faulty, and the display unit or the notification unit notifies the abnormality. Machine control device.