KR20030089094A - Method and apparatus for sensing motor error of washing machine - Google Patents

Abstract

PURPOSE: A wrong operation detecting device of a motor for a washing machine and a method thereof are provided to prevent trouble by detecting the abnormal state of the motor according to the end time of braking of the motor in sensing braking command during washing, and to lengthen the life span by quickly coping with the trouble. CONSTITUTION: A wrong operation detecting device of a motor(400) is composed of a counter(200) counting time by the end of braking in inputting the braking command; a memory storing braking end time; a microcomputer(600) deciding the abnormal state of the motor by detecting the number of the case if the time stored in the memory is over the reference time; and a display unit(500) displaying the wrong operation of the motor according to the control signal from the microcomputer.

Description

Method and apparatus for detecting motor anomaly of a washing machine {Method and apparatus for sensing motor error of washing machine}

The present invention relates to a washing machine, and more particularly, to an apparatus and method for detecting a motor abnormality of a washing machine.

In general, a washing machine is a device for removing various occasions attached to clothes, bedding, etc. by using a friction action of water flow and an impact action between a pulsator and laundry according to the emulsification of the detergent and the movement of the pulsator.

Hereinafter, a fully automatic washing machine according to the related art will be described with reference to the accompanying drawings.

1 is a front view showing the configuration of a general washing machine.

As shown in FIG. 1, a general washing machine includes a main body 1, an outer tank 2 installed in the main body 1, and an inner tank 3 rotatably installed inside the outer tank 2. 3) In the lower center of the pulsator (4) for left and right stirring during washing and dehydration is installed.

The main body 1 maintains the shape of the washing machine as a part forming the outline of the washing machine, supports the upper end of the suspension 16, and the outer tank 2 stores the washing water required for washing.

In addition, the inner shaft (3) and the pulsator (4) is passed through the dehydration shaft (5) of the clutch (8) provided on the bottom surface of the outer tank (2), respectively, and is fastened to each other, the washing shaft surrounding the dehydration shaft (5) ( 6) and the clutch pulley 9 installed on one side of the bottom of the outer tub 2 so that the V-belt 10 is wound around the motor 7 and the clutch 8 driven by a control signal of a controller (not shown). ) And a motor pulley 11 are installed.

The pulsator 4 is installed on the lower end of the inner tank 3, and fixed to the washing shaft 6 of the clutch 8 to rotate left and right to remove contamination by generating mechanical stirring force in the laundry.

The dehydration shaft (5) is a shaft that transmits a rotational force to the inner tank (3), when dewatering to combine the washing shaft (6) inside the clutch (8) to rotate the inner tank (3) in one direction at high speed, The washing shaft (6) is installed concentrically inside the dehydration shaft (5) to transfer the rotational force only to the pulsator (4) when washing, and combined with the dehydration shaft (6) when dewatering to rotate the inner tank (3) To pass.

The V-belt 10 transmits rotational force between the clutch pulley 9 and the motor pulley 11, and the motor pulley 11 is fixed to a motor shaft (not shown) to fix the V-belt 10. The rotational force is transmitted to the clutch pulley 11 through.

In addition, the upper side of the main body 1 is provided with a water supply valve 15 for supplying the wash water to the inside of the outer tank 2 by the control signal of the control unit 19, the outer tank 2 in the main body 1 On the lower side, a drain valve 13 for discharging the washing water in the outer tub 2 to the outside of the main body 1 through the drain hose 14 is installed in accordance with a control signal from the controller 19.

The drain valve 13 discharges dirty washing water to the outside of the washing machine after washing is completed, and opens and closes the drain hose 14 according to a control signal of the controller 19, and the drain hose 14 is an outer tank. It is installed at the lower end of (2) serves as a water passage to discharge the contaminated water to the outside of the washing machine when the drain valve 15 is opened.

The water supply valve 15 is usually installed at the upper back side of the washing machine and is connected to the domestic water supply through a water supply hose (not shown), and serves to supply the required washing water for washing, thereby controlling the control signal of the controller 19. It opens and closes accordingly.

As described above, in the washing machine according to the prior art, the motor 7 and the clutch 8 are driven by a control signal output from the controller (not shown) according to a command input by a user so that the washing machine proceeds to a stroke. do.

As described above, the washing machine according to the related art cannot detect an abnormality of the motor itself even when the motor is abnormal. Therefore, when the braking command is continuously applied even when the motor is abnormal, the time until the completion of braking is preset. By exceeding the completion time, there was a problem in that the operation of the motor was exerted.

The present invention has been made to solve this problem, when a braking command is detected during the operation of the washing machine, the motor abnormality of the washing machine to determine whether the motor abnormality according to the braking completion time of the motor to display the abnormal occurrence to the user It is an object of the present invention to provide a sensing device and method.

1 is a cross-sectional view showing the structure of a general washing machine

Figure 2 is a block diagram showing a motor abnormality detection device of the washing machine according to the present invention

Figure 3 is a flow chart showing a motor abnormality detection method of the washing machine according to the present invention

Explanation of symbols for main parts of the drawings

100: key input unit 200: counter

300: speed detection unit 400: motor

500: display unit 600: microcomputer

700: EEPROM

Motor abnormality detection device of a washing machine according to the present invention for achieving the above object is a counter for counting the time until the braking completion when the braking command is input in the washing machine provided with a motor, the braking completion time counted from the counter A memory for storing, a microcomputer that detects whether the number of times that the time stored in the memory exceeds a preset braking completion time is more than a predetermined number of times, and determines an abnormality of the motor; and the motor according to the control signal of the microcomputer. It is characterized by including a display unit for displaying the occurrence of abnormalities.

Motor abnormality detection method of the washing machine according to the present invention for achieving the above object comprises the steps of starting the washing administration according to the washing course set by the user in the motor abnormality detection method of the washing machine having a motor, a memory and a display, When the braking command is input during the washing operation, counting the time until the braking completion time, determining the occurrence of the abnormality of the motor according to the number of times the counted braking completion time exceeds a preset time, and It is characterized by including the step of displaying whether or not an abnormality occurs.

Hereinafter, with reference to the accompanying drawings will be described in more detail the motor abnormality detection device and method of the washing machine according to the present invention.

Figure 2 is a block diagram showing a motor abnormality detection device of the washing machine according to the present invention, Figure 3 is a flow chart showing a motor abnormality detection method of the washing machine according to the present invention.

Motor abnormality detection device of the washing machine according to the present invention, as shown in Figure 2, the braking command through the key input unit 100, the motor 400, and the key input unit 100 for inputting the user's request command When the braking is detected due to the input or opening of the door (not shown), the counter 200 counting the time until the braking of the motor 400 is completed, and the braking completion time counted by the counter 200 is stored. A memory (EEPROM) 700 and a microcomputer for detecting an abnormal occurrence of the motor 400 by detecting whether the number of times the time stored in the memory 700 exceeds a preset braking completion time is a predetermined number or more. And a display unit 500 for displaying an abnormal occurrence of the motor according to the control signal of the microcomputer 600.

Here, the memory 700 is an EEPROM, and the display unit 500 is composed of an LCD.

Referring to the operation of the motor abnormality detection device of the washing machine according to the present invention configured as described above are as follows.

When the user inputs a braking command through the key input unit 100 or the braking is detected due to the opening of a door (not shown) during the washing operation of the washing machine, the microcomputer 600 controls the motor 400 to stop. Output the signal.

Subsequently, according to the control signal of the microcomputer 600, the time until the braking is completed is counted in the counter 200 and stored in the memory 700. In addition, the microcomputer 600 determines whether the time stored in the memory 700 is equal to or greater than a preset braking completion time, and also determines whether a time longer than the braking completion time is counted for a predetermined number of times or more.

As a result of the determination of the microcomputer 600, when the motor 400 brakes more than a predetermined number of times after a preset braking completion time, it is determined that an abnormality has occurred in the motor 400, and the display unit 500 Displays a message informing you of an error in the motor.

As described above, the motor abnormality detection method of the washing machine according to the present invention will be described with reference to FIG. 3. First, when power is supplied to the washing machine, it is determined whether the user inputs an operation start command (S11 to S12).

Subsequently, when the determination result (S12), the user inputs an operation start command, the washing administration according to the course set by the user is started (S13).

Then, it is determined whether a braking command is detected during the washing administration (S14).

Subsequently, if the braking command of the washing machine is not detected, the determination result (S14) determines whether the braking command is continuously detected while proceeding the washing process according to the set course (S15).

On the other hand, when the determination result (S14), when the braking command of the washing machine is detected, the time until the completion of braking of the motor is counted (S16).

In operation S17, it is determined whether the counted time exceeds a preset time.

On the other hand, if the counting time (S16), the counted time exceeds the preset time is stored in the memory (S18).

In operation S19, it is determined whether the braking completion over time stored in the memory is stored for a predetermined number of times or more.

As a result of the determination (S19), if the braking completion time is stored more than a predetermined number of times, it is determined that the abnormality of the motor is generated and a message for informing the occurrence of the abnormality of the motor is displayed on the display unit (S20).

As a result of the determination (S17), if the counted time does not exceed the preset time, the braking is completed (S21).

As described above, the motor abnormality detection apparatus and method of the washing machine according to the present invention, when the user opens the door while driving the washing machine, or if the braking command is detected in the washing machine microcomputer by inputting the braking command, the motor is preset time Control to complete braking within However, when braking is completed for a predetermined number of times or more after the preset time, it is determined that an abnormality of the motor itself is generated and a message regarding the occurrence of a motor abnormality is displayed to the user.

As described above, the motor abnormality detecting apparatus and method of the washing machine according to the present invention have the following effects.

First, when the braking command is detected during the use of the washing machine, it is determined whether the braking is completed within the preset time, and detects the abnormality of the motor and displays the abnormality accordingly so that the user can easily recognize the abnormality of the motor. can do.

Second, since the user can easily recognize the occurrence of the abnormal motor, a quick response is made.

Third, because it can respond quickly according to the motor abnormality, it is possible to prevent the occurrence of failure in advance, and to extend the life of the product.

Claims (7)

In a washing machine with a motor, A counter for counting the time until the braking is completed when the braking command is input; A memory for storing the braking completion time counted at the counter; A microcomputer that detects whether the number of times that the braking completion time stored in the memory exceeds a preset braking completion time is greater than or equal to a predetermined number of times to determine an abnormality of the motor; And, And a display unit for displaying an abnormal occurrence of the motor according to the control signal of the microcomputer. The method of claim 1, The motor abnormality detection device of the washing machine, characterized in that the memory is EEPROM. The method of claim 1, Motor abnormality detection device of the washing machine, characterized in that the display unit is an LCD. In the motor abnormality detection method of a washing machine having a motor, a memory and a display unit, Starting a washing administration according to a washing course set by a user; Counting a time until a braking completion time when a braking command is input during the washing operation; Determining an abnormal occurrence of the motor according to the number of times that the counted braking completion time exceeds a preset time; And, Motor abnormality detection method of a washing machine comprising the step of displaying whether or not the abnormality of the motor. The method of claim 4, wherein Determining an abnormal occurrence of the motor Determining whether the counted braking completion time exceeds a preset time; Storing a counted braking completion time in the memory when the counted braking completion time exceeds a preset time; Determining whether the braking completion time stored in the memory exists more than a predetermined number of times; And detecting the abnormality of the motor when the braking completion time stored in the memory exists more than a predetermined number of times. The method of claim 5, The motor abnormality detection method of the washing machine, characterized in that further comprising the step of completing the braking if the counting braking completion time does not exceed the preset time. The method of claim 4, wherein The motor abnormality detection method of the washing machine, characterized in that further comprising the step of proceeding the washing stroke according to the set course if the braking command is not input among the washing stroke.