KR940008626B1 - Laundry measurement method of washer - Google Patents

Abstract

The method for sensing the laundry quantity of a washing machine is disclosed to minimize a damage from an excessive washing and reduce a use electricity and a use material in the washing by sensing the exact laundry quantity. The method includes the steps of: counting a processing time of two pulses and total pulse numbers; judging whether the number of left turns of left turns of a motor is four; turning the motor right and then counting pulse number after detecting a stop signal when the motor stops; judging whether the number of right turns of the motor is 4; and judging whether the number of normal turns number and the number of reverse turns of the motor are 12 respectively.

Description

How to sense the amount of washing machine

1 is a conventional circuit configuration diagram.

2 is a circuit diagram of the present invention.

3 is an output waveform diagram of the present invention.

4 is a flow chart of the control operation of the present invention.

5 is an experimental data graph of the pulse number and pulse time of the present invention.

6 is a reciprocal 2kg reference pulse time graph of the present invention.

7 is a mathematical operation of the present invention.

8 is a graph in which the pulse number and pulse time of the present invention are added 1: 1.

* Explanation of symbols for main parts of the drawings

10: micom 15: photo coupler

20: motor

The present invention relates to a method for sensing a quantity of washing machine, and more particularly, to a method for more efficient washing by sensing the laundry accurately in the automatic washing machine.

The conventional washing machine sensing circuit is shown in FIG. 1 and is configured by connecting the motor 20 to the microcomputer 10 through the photocoupler 15 and the diodes D1 and D2.

Power 1 is supplied to the motor 20, and a Vcc voltage is supplied to the photocoupler 15. In this configuration, the capacity sensing of the washing machine senses the quantity of water having the number of pulses generated at both ends of the diode D2 by the counter electromotive force generated by the motor 20 when the power source 1 is cut off.

In fact, at the load of 0.5 kg of laundry, about 6 to 7 pulses are generated in one rotation of the motor, and at about 6 kg load, about 2-3 pulses are generated in one rotation of the motor.

By repeating this 24 times in the quantity sensing, the quantity is sensed by the increased number of pulses because the difference is increased.

Such conventional quantity sensing technology has a problem in that a pulse does not occur because the motor stops immediately when the power is cut off due to the twist of the fabric as the quantity of foam increases. In addition, there is a problem that the rear pulse is irregular or does not occur in the pulse generation when the 6kg load occurs, which adversely affects accurate dose sensing.

Since the above-mentioned quantity sensing is inaccurate, there are many problems in washing time and water level control. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the related art. The present invention provides a method of sensing a quantity of a washing machine that accurately detects a pulse according to the load of an automatic washing machine and accurately senses the amount of laundry and washing time and water level during washing. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to achieve the above object of the present invention.

2 is a circuit configuration diagram of the present invention, in order to process not only the number of pulses generated by the counter electromotive force of the motor 20 but also the two pulse durations at the same time, the smoothing capacitor C2 in parallel at both ends of the diode D2. ) To connect.

The capacitor C2 smoothes the voltage across the diode D2.

The capacitor C1 is connected to the microcomputer 10 and grounded. Other same reference numerals are the same as those of the conventional circuit diagram.

In the configuration of the present invention, when the power source 1 is blocked, the counter electromotive force is generated due to rotation by the inertia of the motor 20. In this case, the voltage waveform generated between the both ends of the diode D2 is shown in FIG.

The voltage waveform across the capacitor C1 due to the voltage is generated as shown in FIG. 3b. When two of the waveforms generated as shown in FIG. 3b are measured, the time is displayed as shown in FIG.

In other words, the pulse progress time T increases in proportion to the Y-axis dose.

Since the process time T of the pulse shown in FIG. 3c is used in combination with the number of pulses, the pulse number increases or decreases due to the twist of the cloth generated when sensing the quantity of the pulse with only the number of pulses, and the abnormal pulse generated at the last rear end. The bad influence can be prevented.

4 illustrates a flow of control operations for counting pulse numbers with reference to FIG.

Here, the counter is built in the microcomputer 10, and the microcomputer 101 also performs the overall control described later.

When operation 101 of the washing machine starts 101, the motor 20 is rotated left 102, and when the motor 20 is stopped, the stop signal is detected 103 and then the running time T of two pulses (see FIG. 3b). ) And the total number of pulses are counted (104).

After processing the counting step 104, it is determined whether the left rotational speed of the motor 20 is "4" (105), and if not 4, the process jumps to the step 102, and if the left rotational speed of the motor 20 is 4, the motor Turn right (106).

When the motor is stopped, a stop signal is detected 107 and the number of pulses at that time is counted 108. Then, it is determined whether the number of right rotations of the motor 20 is "4" (109). If the number of left rotations of the motor 20 is 4, it is determined whether the forward and reverse rotations of the motor 20 are "12", respectively.

If the determination 110 results in the forward and reverse rotation speed not being 12, the process jumps to step 102, and if it is 12, the operation ends.

As a result of the above operation, a graph showing the relationship between the number of pulses and the pulse time according to the weight of the laundry (kg) is shown in FIG.

5 is experimental data of the number of pulses and the pulse time.

As can be seen here, the number of pulses decreases with the weight of the laundry, but the pulse time increases with the weight of the laundry.

6 is a graph showing the inverse of the pulse time on the basis of 2 kg, which is the most frequently used for washing, in order to combine the pulse number and pulse time in a 1: 1 ratio.

That is, it is the graph which took the reciprocal of pulse time and shifted the said reciprocal value in 2 kg so that it might become the same as the pulse number in 2 kg.

7 is a graph diagram mathematically manipulated to increase the range of pulse time since the influence of pulse time is extremely small when the number of pulses and pulse time are combined 1: 1.

8 is a graph in which the number of pulses and the pulse time are summed 1: 1.

In this way, when the number of pulses and the pulse time are summed 1: 1, the range between each dose and the dose increases, thereby minimizing the influence of small irregular errors.

As described above, the present invention can control the exact washing time and the proper level of the laundry by sensing the correct amount of the washing machine, thereby minimizing damage due to excessive washing, and reducing the power consumption and the use.

Claims (3)

When the operation of the washing machine is started 101, the motor rotates 102 to the left, and when the motor stops, it detects the stop signal 103, and then detects the stop time of two pulses. After the two pulse counting means, the motor rotation speed determining means for determining whether the left rotation speed of the motor is 4 (105), and the motor rotates to the right (106) according to the motor rotation speed determining means and stops when the motor stops. A right turn pulse counting means for counting the number of pulses 108 after the signal is detected 107, a motor right turn determining means for determining (109) whether the right turn number of the motor is four after executing the right turn pulse counting means, and the motor The washing machine, characterized in that it is equipped with a motor reverse rotation determination means for determining whether the forward rotation and the reverse rotation of the motor 12 respectively according to the right rotation speed determination means to sense the correct amount of washing machine Amount sensing method. 2. A method according to claim 1, wherein a capacitor for smoothing the voltage across the motor diode is used to process the two pulse counting means. The method of claim 1, wherein the amount of pulse is sensed by combining the number of pulses and the running time of the pulse of the two pulse counting means.