KR0125599B1 - Malfunction detection method of a washing machine driver - Google Patents

Abstract

The present invention relates to an abnormality detection method of a washing machine water supply unit for detecting structural deformation of a water supply valve and an abnormal state of a water supply driver circuit, and leaked through a water supply valve due to a structural deformation of a water supply valve and an abnormal state of a triac. It detects the abnormal water supply through the water supply to detect the abnormal condition of the water supply valve and triacs to take precautions to reduce the washing effect due to the excessive supply of water, and to prevent the waste of water.

In order to provide an effect as described above, the present invention performs a series of washing strokes after supplying water to a predetermined water level, and the washing step 400 detects a change in the water level, and the water supply valve after the washing step 400. The abnormality detection method of the washing machine water supply drive unit, characterized in that it consists of an abnormality determination step (500) to detect the energized state of (V) to display the abnormality of the water supply unit (100) circuit or the abnormality of the water supply valve (V).

Description

Abnormality Detection Method of Washing Machine Water Supply Drive

1 is a schematic control block diagram of a washing machine to which the present invention is applied;

2 is a detailed circuit diagram of the water supply driving unit of the washing machine of the present invention.

3 is a flow chart of the abnormality detection method of the water supply drive unit of the present invention.

* Explanation of symbols for main parts of the drawings

11: micom 12: power supply

13: water level detection unit 14: water supply valve energization detection unit

15: motor drive unit 16: supply and drain drive unit

17: display unit 18: load power cut-off unit

The present invention relates to an abnormality detecting method of a washing machine water supply driver, and more particularly, to an abnormality detecting method of a washing machine water supply driver for detecting a water supply abnormality due to a structural deformation of the water supply valve and a circuit error of the water supply driver.

In the case of a general washing machine, a series of strokes, such as washing, rinsing, and dehydrating stroke, are controlled to perform washing by controlling each driving device by a predetermined program pre-entered in the microcomputer, and are configured to move the driving devices in conjunction with each other. Therefore, if one of each of the driving device does not detect a failure, there were many cases affecting other parts.

In particular, the water supply drive part is composed of a truncation fluid and a water supply valve. When the triac is an electrical problem, that is, a short circuit occurs, power is continuously supplied to the water supply valve, so that the water level cannot be adjusted. There is a problem of lowering the washing effect as well as waste of water, and since the water supply valve is repeatedly opened and closed by the solenoid, structural deformation of the water supply valve itself occurs, so that the water level is controlled even when the triac is normally operated. It could not be achieved, such as reduced washing effect and waste of water had problems.

An object of the present invention is to detect the water level supplied during washing to determine whether the detected water level maintains the determined level, if the detected water level does not maintain the determined level, water supply valve abnormality or circuit of the water supply driver By warning that there is an error in, to prevent the washing water waste and washing effect caused by the water supply valve abnormality or the circuit abnormality of the water supply drive unit is to be lowered.

Determining the water level according to the amount of washing at the time of washing of the present invention, water supply to the determined water level in order to achieve the above object, and proceeding to the washing, detecting the water level during the washing in the step, and Determining whether the detected water level is the same as the determined adoration; if the detected water level is the same as the determined adoration, washing the water while determining whether the washing is completed; and If it is not the same as the determined water level, determining whether there is an abnormality in the water supply valve, if there is no abnormality in the water supply valve in the step, displaying an abnormality in the circuit, and if there is an abnormality in the water supply valve in the step, displays the water supply valve abnormality It is characterized by consisting of steps.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic control block diagram of a washing machine to which the present invention is applied. The washing machine, washing, rinsing, and dehydration, which are a series of washing operations, are controlled by a predetermined program, and the microcomputer outputting a controlled signal to each driving unit. 11), the power supply unit 12 for applying a driving power to the microcomputer 11, the water level detection unit 13 for detecting the water supply and drainage level in the washing tank by the control signal of the microcomputer 11, The washing and rinsing is performed while the water supply valve energization detecting unit 14 detects the energization state of the water supply valve V according to the control signal of the microcomputer 11, and the counter signal rotates forward and backward by the control signal of the microcomputer 11. The motor drive unit 15 dewatering while rotating at a high speed in one direction, the water supply drive unit 16 supplying the wash water to the washing tank by the control signal of the microcomputer 11, and the control signal of the microcomputer 11 Laundry administration process And a load power cut-off unit 18 that cuts off power supply to the load end by the control signal of the microcomputer 11 and a display unit 17 displaying an alarm.

2 is a detailed circuit diagram of the water supply driving unit of the washing machine according to the present invention. The washing, rinsing, and dehydrating strokes, which are a series of washing strokes, are controlled by a predetermined program, and the microcomputer 11 outputs a controlled signal to each drive unit. The water supply driver 16 includes a transistor TR1, a resistor R1, a triac, a capacitor C1, and a water supply valve V at an output terminal P1 of the microcomputer 11. In the washing machine provided with a pressure dividing resistor (R2) (R3), a diode (D1), a resistor (R4) (R5) between the both ends of the water supply valve (V) for sensing the energized state of the water supply valve (V), A water supply valve energization detecting unit 14 including a transistor TR2 is connected, and an output terminal of the water supply valve energization detecting unit 14 is connected to an input terminal IN of the microcomputer 11, and the water supply valve V ), The output of the microcomputer 11 through the load power cut-off unit 18 consisting of a relay (RY), a relay connection terminal (RY-S), a transistor (TR3). It is a hayeoseo connected to a terminal (P2).

3 is a flow chart of the abnormality detection method of the water supply drive unit of the present invention, the water level determination step 30 to determine the water level according to the amount of laundry during washing, and the water level determined when the water level is determined in the water level determination step 30 The water supply step 31 for supplying water, the water supply completion determination step 32 for determining whether the water supply is completed at the water level determined in the water supply step 31, and washing the water supply when the water supply is completed in the water supply completion determination step 32 The washing step 33, the water level depressing step 34 for detecting the current water level in the state of washing in the washing step 33, and the current water level detected in the water level detecting step 34 and the determined worship If the water level determination step 35 to determine whether the same as the water level determination step 35, and the current water level detected in the water level determination step 35 is the same as the determined water level washing completion plate to wash until the laundry is completed while determining whether the washing is complete Step 36 and, if the current water level detected in the water level determination step 35 is not the same as the determined water level, the water supply valve energization determination step 37 to determine whether the water supply valve is energized, and the water supply valve energization If the water supply valve is energized in the judging step 37, the water supply circuit abnormality display step 38 indicates that there is an abnormality in the water supply circuit, and if the water supply valve is not energized in the water supply valve energization determination step 37, A water supply valve abnormality display step 39 indicating that there is an error, and a load power cut-off step of supplying power to the load end when the water supply is abnormal in the water supply circuit abnormality display step 38 and the water supply valve abnormality display step 39. It is made of (40).

Referring to the effects of the present invention made as described above are as follows.

When power is supplied to the washing machine, the laundry to be washed is put in a washing tank, and then inputted to the microcomputer 11 for a series of washing administrations according to a predetermined program set for the washing administration input from the microcomputer 11. When the washing is started, the washing is started while outputting the controlled signal to each driving unit. That is, when the washing is started, the microcomputer 11 goes to the water level determination step 30 in an initializing state and the motor driving unit ( By controlling 15), the water supply level is determined in a load state acting on the motor driver 15.

When the water supply level is determined as described above, the microcomputer 11 goes to the water supply step 31 and through the output terminal P1, the transistor TR1, the resistor R1, the triac, the capacitor C1, and the water supply. By controlling the water supply driving unit 16 composed of a valve (V) to open the water supply valve (V) to proceed with water supply to the determined water level in the washing tank, and then go to the water supply completion determination step 32 to the water level detection unit (13) Control the water level to detect the water supply, and the water supply level is detected while determining whether the water supply is completed to the determined water level is to proceed with the water supply until the water supply is completed.

On the other hand, when the water supply is completed at the level of the water supply is determined, go to the washing step 33, the microcomputer 11 proceeds the washing while the forward and reverse rotation of the motor for controlling the motor driving unit 15, and then the The microcomputer 11 goes to the water level detection step 34 to control the water level detection unit 13 to detect the current water level in progress of the washing, and to go to the water level determination step 35 to determine the detected current water level and the determined water level. In this case, the reason for judging the water level is that the water is not supplied to the water supply circuit due to an abnormality in the water supply circuit or the water supply valve. And to prevent deterioration of the washing effect.

Therefore, if the current water level detected as a result of the determination in the water level determination step 35 is the same as the determined adoration, the microcomputer 11 determines that there is no abnormality in the water supply and proceeds to the washing completion determination step 36 to see if the washing is completed. Washing is to proceed until the washing administration is completed while determining, on the other hand, if the current level detected as a result of the water level determination is not the same as the determined water level, the microcomputer 11 to the water supply valve energizing decision step 37 Then, it is determined whether the water supply valve V is energized through the water supply valve energization detecting unit 14 including the divided resistors R2 (R3), the diode D1, the resistors R4 (R5), and the transistor TR2. In this case, when a high signal is input from the water supply valve energization detecting unit 14 to the input terminal IN of the microcomputer 11, the microcomputer 11 generates an abnormality in the water supply driving unit 16. Supply valve (V) It is determined that the water supply continues because the water is not controlled, go to the water supply circuit abnormality display step 38 and control the display unit 17 to indicate that there is an error in the water supply circuit, while the water supply valve energizing judgment step When the low signal is input through the water supply valve energization detecting unit 14 at 37, the microcomputer 11 has no abnormality in the water supply driver 16, and due to the structural problems of the water supply valve V itself, Determining that the water supply valve (V) cannot be controlled by the water supply (11), the water supply continues, and the flow of the water supply valve abnormality display step (39) is controlled to display the abnormality of the water supply valve by controlling the display unit (17). In step 40, the load power cut-off unit 18 constituted by the transistor TR3, the relay RY, and the relay connection terminal RY-S is controlled to supply the water supply valve V of the water supply driver 16. Cut off the power supply Will.

As described above, the present invention detects the water level supplied to the laundry in the state of supplying the water level determined during washing, and determines whether the detected water level maintains the determined water level, thereby determining the detected water level. If it is not maintained, the water supply valve or the water supply driver's circuit is alerted to prevent the waste of water and washing effect caused by the water supply valve or the water supply driver's circuit. Will be provided.

Claims (1)

When washing the water level is determined according to the amount of washing, and whether the water supply and water supply is completed by the determined water level, if the water supply is completed, the washing step 33 and the washing step 33 in the state that the washing is in progress In the water level detection step 34 for detecting the current water level, the water level determination step 35 for determining whether the current water level detected in the water level detection step 34 is equal to the determined water level, and in the water level determination step 35 If the detected current water level is equal to the determined water level, the washing completion plate step of washing while determining whether the washing is completed and the current water level detected in the water level determination step 35 are not the same as the determined water level, The water supply valve energization determination step (37) for judging whether the water supply valve is energized, and if the water supply valve is energized at the water supply valve energization determination end (37), it indicates that there is an abnormality in the water supply circuit. Water supply circuit abnormality display step (38), and if the water supply valve is not energized in the water supply valve energization determination step 37, The abnormality detecting step (38) and the water supply valve abnormality display step (39), the abnormality detection method of the washing machine water supply drive, characterized in that the water supply abnormality is made to the load power cut-off step (40) to cut off the power to the load end.