KR950007066B1 - Detergent measuring apparatus and rinsing method for washing machine - Google Patents

Abstract

The device of measuring detergent amount is characterized by that a support for supporting two electrode rods is provided at a designated site of the inside tank in a washer so as to detect detergent amount included in a washing water according to the currents flowing between the electrode rods.

Description

Detergent measuring device and rinsing control method of washing machine

1 is a schematic configuration diagram of a washing machine according to the present invention.

2 is a circuit diagram according to the present invention.

3 is a control flowchart according to the present invention.

* Explanation of symbols for main parts of the drawings

4 support 5,6 electrode

20: control means 30: motor driving means

40: detergent amount detection means

The present invention relates to measuring the amount of detergent put into the washing machine, and in particular, the detergent measuring device and rinsing of the washing machine to provide the number and method of rinsing so that the optimum rinse according to the amount of detergent during the rinsing operation by detecting the amount of detergent It relates to a control method.

Conventionally, the rinsing operation is performed in a predetermined manner by the number of rinses set by the user at the initial washing time during the rinsing operation of the washing machine, or in the case of a washing machine having an automatic washing function, the rinsing frequency is automatically determined according to the amount of laundry.

However, although the degree of the detergent being released by the washing water has a certain difference depending on the type of detergent or the amount of detergent, the washing is performed only by the constant rinsing method, thereby revealing inefficiency in the rinsing operation.

In addition, a more improved method was to install an optical sensor in the drain of the washing machine to detect the cleanliness of the wash water so that the optimal rinsing was possible during the rinsing operation. It has caused a problem.

The present invention has been made in view of the above problems, an object of the present invention is to detect the amount of current flowing through the wash water by using two electrodes to accurately detect the amount of detergent mixed in the wash water (detergent The present invention provides a detergent measuring apparatus of a washing machine that can indirectly measure the amount of detergent by flowing a current well because it contains a lot of electrolyte components.

Another object of the present invention is to provide a rinsing control method of a washing machine to achieve an optimal rinsing efficiency by varying the number and manner of rinsing operations based on the detected detergent amount.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a washing machine according to the present invention, the washing tank 3 is installed inside the washing machine case 1 so as to rotate left and right, and the inner tank surrounding the washing tank 3 at a predetermined interval. (2) is configured to fix the two electrode rods (5) (6) through the support (4) on the lower side of the inner tank (2) to detect the amount of detergent released in the wash water. In addition, during the rinsing operation, the water supply pipe 11 is provided in the upper portion of the inner tank 2 through the water mouth 10 to rinse the water, and when the rinsing water is rinsed, the washing water is out of the washing machine through the water supply pipe 11 and the drain pipe 8. The water is discharged, and the wash water is discharged through the drain hole 7 and the drain pipe 8 provided at the lower portion of the inner tank 2. The drain pipe 8 is provided with a drain valve 9 to control the drainage, and the washing motor ( The pulsator 19 and the inner tank 2 are rotated left and right in a predetermined manner according to the action of the gear mechanism 16 interlocked with the rotation of M) through the valve 15. Therefore, washing operation is performed.

Reference numeral 11 is a hot water pipe, 12 is a cold water pipe, 13, 14 is a valve, 17 is a detergent container, 18 is a detergent inlet.

2 shows a sensing control circuit of the electrode rods 5 and 6 as described above. The output port PO ₁ of the control means 20 which is a one-chip microcomputer incorporating a constant control program according to the present invention. (PO ₂ ) includes resistors (R ₁ to R ₄ ), transistors (Q ₁ ) (Q ₂ ), triac (TC ₁ ) (TC ₂ ), motor starting capacitor (C), inductor (L) and washing motor Motor driving means (30) consisting of (M) is connected to drive the washing motor (M) left and right so that the washing can proceed in a predetermined washing method.

First, when the control means 20 outputs a low level signal to the output port PO ₁ for the right rotation driving of the washing motor M, the output low level signal is transmitted through a resistor R ₂ (R ₁ ). The low potential is applied to the base of Q ₁ so that the transistor Q ₁ is turned on and a trigger signal is applied to the gate terminal of the triac TC ₁ connected to the emitter terminal of the transistor Q ₁ to generate a triac TC. ₂ ) is energized and the motor M is driven to rotate left.

In addition, the low signal output to the output port PO ₂ of the control means 20 to drive the motor PO ₂ left turn is low potential at the base of the transistor Q ₂ through the resistor R ₄ (R ₃ ). The transistor Q ₂ is turned on and a trigger signal is applied to the gate terminal of the triac TC ₂ connected to the emitter terminal at the same time so that the triac TC ₂ is energized to drive the motor M to the left. will be.

On the other hand, the control means 20 is a detergent amount detection means 40 composed of resistors R ₅ to R ₇ , transistors Q ₃ , and electrodes 5 and 6 at the output port PO ₃ and the input port PI. ) Is connected, and the control means 20 outputs a low level signal shortly at an interval of 1 second to the output port PO _{3 in} order to detect the amount of detergent released in the wash water. At this time, the low-level signal outputs a direct current applied to the emitter of transistor Q ₃ by applying a low potential to the base of transistor Q ₃ through resistor R ₆ and R ₅ to turn on transistor Q ₃ . The voltage (Vcc: 5V) is applied to the electrode bar 5. The DC voltage Vcc ≒ is V _1, the voltage (V ₁₎ the size of the electrode 5 and the current (I ₁₎ flowing between the electrodes (6) in accordance with the conduction of sejeryang in the wash water when this is applied to the electrode (5) Is different and eventually leads to a change in potential (V ₂ ).

Accordingly, the value of the potential V ₂ across the resistor R ₇ is input to the input port PI of the control means 20 so that the control means 20 indirectly recognizes the current detergent amount. For example, when the amount of detergent released in the wash water increases, the value of the current I ₁ flowing through the electrode 5 and the electrode 6 becomes large due to the electrolyzed components contained in the detergent, which causes the potential V ₂ to increase. Becomes

In addition, the reason why the voltage is applied to the electrodes 5 and 6 for a short time (1 second interval) to the output port PO ₃ when the detergent amount is detected is generated when the voltage is applied to the electrodes 5 and 6 for a long time. This is to prevent corrosion of the electrode rods 5 and 6 due to the electrolysis of water.

In addition, a DC power supply means 50 is provided at an AC input terminal to form a constant DC voltage Vcc to supply the control means 20 to the peripheral circuit as well.

The control method of the present invention constructed as described above will be described with reference to the flowchart of FIG.

First, the power source AC is supplied to the circuit, and a predetermined command for washing operation (function) is input by a key input means (not shown). When the washing start command is input, the control means 20 outputs the output port PO. ₁ ) A predetermined output is performed at (PO ₂ ) to proceed with the normal washing process, and the built-in internal timer function determines whether the rinsing time has arrived.

As a result of the determination, when the above-described washing administration is finished and the rinsing administration timing is detected, the output port PO ₃ is output five times at the interval of one second and at the same time, the value input to the input port PI is read. Therefore, the average value of the detergent amount signals detected five times is calculated.

At this time, when the average value Va is Va≥3V, the control means 20 performs a predetermined output to the output ports PO ₁ and PO ₂ to perform a predetermined rinsing.

The predetermined rinsing a) performs two times of rinsing of water and one time of general rinsing, and the general general rinsing refers to ① drainage → ② balance dewatering → ③ dehydration → ④ water supply → ⑤ washing, and the main rinsing is general During the rinsing process, the washing process of ⑤ is carried out in a state in which water is maintained continuously from the water supply process ④ so that the detergent water in the washing tank 3 is discharged to the outside through the ripe water pipe 11.

Therefore, when the average Va, which is a case where the amount of detergent is large, is Va≥3V, the above-described predetermined rinsing step is performed, followed by the normal dehydration process, and the process ends. When the average value Va is 2V≤V <3V, A predetermined rinse (b) is performed, but a correct rinse (b) is performed once a main water rinse and a regular rinse, and when the average value Va is 1V≤Va <2, a predetermined rinse is performed. However, a predetermined rinse (C) is performed only two times of normal rinsing, and when the average value Va is 0≥Va <1, a predetermined rinse (D) is performed, but the predetermined rinse (D) is a regular rinse only once. After the predetermined rinsing step (a) (b) (c) (d) is carried out, the dehydration administration is performed, and then the washing is finished.

As described above, the present invention has the effect of achieving the most optimal rinsing efficiency by varying the number and method of rinsing according to the amount of detergent released in the wash water.

Claims (2)

The amount of detergent in the wash water according to the amount of current flowing between the electrodes 5 and 6 by installing a support 4 supporting two electrodes 5 and 6 at a predetermined portion of the inner tank 2 of the washing machine. Detergent measuring device of a washing machine, characterized in that to detect the. Detergent amount is detected using a pair of electrodes (5) (6), and in the rinsing method of the washing machine according to the amount of detergent, the voltage is applied to the electrode (5) (6) for a predetermined number of times at regular intervals at the beginning of the rinsing stroke. And detecting the amount of detergent through the current flowing through the electrodes 5 and 6 during the predetermined number of times, calculating an average value of the detergent amount input for the predetermined number of times, and rinsing operation according to the average amount of detergent. Rinsing control method of the washing machine comprising the step of setting to correspond to the amount of detergent.