KR940008625B1 - Laundry measuring apparatus of washing machine - Google Patents

Abstract

The laundry sensing apparatus of an automatic washing machine for sensing the laundry weight through a weight sensing apparatus connected to a pulsator is executes a precise operation with construction of a lower price. The apparatus includes a pulsator driving center part for changing a reactance of a sensor coil according to the laundry quantity, a colpitts oscillator constructed by the sensor coil, a resistence, a capacitor, etc. and for providing a changed oscillating frequency according to the reactance change, and a microcomputer for controlling a water level beginning and a course process according to the laundry quantity.

Description

Laundry Detection Device of Washing Machine

1 is a conventional fully automatic washing machine structure diagram.

2 is a conventional fully automatic washing machine circuit diagram.

3 is a principle diagram of the rotation sensor in FIG.

4 is a structure diagram of a fully automatic washing machine according to the present invention.

5 is a connection state of the primary drive shaft and the secondary drive shaft in the fully automatic washing machine structure according to the present invention.

6 is a fully automatic washing machine circuit diagram according to the present invention.

7 is a flowchart illustrating an operating state of the automatic washing machine according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Stirrer 2: Kyobagi fixing holder

2 ': Stirrer primary drive shaft 3: fixed shaft outer case

4 sensor coil 5 outer cylinder

6: drain magnet 7: clutch lever

8: clutch boss 9: clutch device

10: motor 11: V-valve

12: dewatering shaft 13: washing shaft

14 spring 15 agitator secondary drive shaft

16: washing tank 17: fluid automatic balance device

18: clutch pulley 19: magnet

20: induction coil 100: micom

11: display unit 120: key circuit unit

130: buzzer driver 140: interrupt circuit

150: oscillation circuit section 160: reset circuit section

170: load driving circuit 180: power supply

190: pressure sensor 200: rotation sensor

210: Colpitts oscillation unit

The present invention relates to a laundry detection device of a full automatic washing machine, and more particularly, to a laundry detection device of a washing machine to recognize the weight of the laundry through a weight sensor device connected to a pulsator and to automatically adjust the water level and the course. . In the technical configuration of a conventional fully automatic washing machine, as shown in FIG. 1, the power of the motor 10 is transmitted to the stirrer 1 through a V-belt 11, and the draining magnet 6 is dehydrated. When the clutch lever (7) is pulled and the clutch lever (7) is operated, the clutch in the clutch device (9) is powered by the dehydration shaft (12) connected to the dehydration tank and the washing tank (16), rotates, and proceeds with dehydration. At the time of washing, the drain magnet 6 is turned off, and the clutch lever 7 is returned again (to the left in the drawing) by the force of the spring to fix the clutch boss 8, and at this time, dehydration of the clutch The shaft 12 is fixed and only the washing shaft shaft 13 operates so that the stirrer 1 rotates to proceed with washing.

2 is a conventional washing machine circuit diagram having the above-described technical configuration. The microcomputer 100 includes a display unit 110, a key circuit unit 120, a buzzer driver 130, an interrupt circuit unit 140, an oscillation circuit unit 150, and a reset unit. The circuit unit 160, the load driving circuit unit 170, and the power supply unit 180 are connected to each other, and the pressure sensor 190 and the rotation sensor 200 are connected to each other, and the display unit 110 includes washing time, dehydration, and rinsing. It is a circuit that informs the user of the status information of various washing machines through light emitting diodes (LEDs) and segments, and the interrupt circuit unit 140 recognizes the zero point of the commercial frequency (50/60 [HZ]) to calculate the time. It is a circuit for use, the oscillator circuit 150 is a circuit for providing a clock to the microcomputer 100, the reset circuit unit 160 resets to the microcomputer 100 at the time of power ON (ON) / OFF (OFF) Circuit for initializing by providing a signal, the pressure sensor 190 detects the water level, 200 senses the amount of laundry.

Hereinafter, the operational state of the above described technical configuration will be described with reference to the principle diagram of the rotation sensor shown in FIG. 3.

First, the laundry is put into operation and the washing machine supplies water to the minimum level by the microcomputer 100, and then rotates the stirrer 1 for 13 seconds using the friction force between the stirrer 1 and the fabric as shown in FIG. Likewise, the magnet 19 attached to the clutch pulley 18 cuts the guide coil 20 attached to the clutch housing for 13 seconds to change the amount and level of the gun.

) 끊는 회수가 작으므로 고수위로 선택하고 세탁코스를 강력으로 선택하며, 세탁물이 중간정도의 양이면 자속(

)를 끊는 회수가 고수위보다는 많으므로 중수위로 선택하고 세탁코스는 표준으로 변경하며, 세탁물의 양이 적으면 끊는 회수가 더 많으므로 저수위로 선택하고, 세탁코스는 표준 또는 절약으로 선택한다.If you have a lot of laundry, magnetic flux

) Since the number of breaks is small, choose the high water level and strongly choose the washing course.

Since the number of times of cutting off is higher than the high water level, select the medium water level and change the washing course to standard. If the amount of laundry is small, the number of cutting times is higher, so select the low level, and choose the washing course as standard or saving.

에 의해 트랜지스터(Q4)가 동작하여 마이콤(100)의 단자(PO₂)에 입력되면 마이콤(100)이 상기 신호를 인식하여 부하구동회로부(170)를 제어한다. 이때 수위를 감지하는 압력센서(190)는 세탁조(16)의 수위에 따라 생기는 압력을 고무호스를 통해 전달받아 코일(L₁)중의 철심을 이동시켜 리액턴스값(L)을 변화시키면(저수위면 압력이 적으므로 코일내의 철심이동이 작아 L값이 작고, 압력이 크면 이동이 커서 L값이 커진다).Electromotive force generated in the rotation sensor 200 as described above

When the transistor Q4 is operated to be input to the terminal PO ₂ of the microcomputer 100, the microcomputer 100 recognizes the signal and controls the load driving circuit unit 170. At this time, the pressure sensor 190 for detecting the water level receives the pressure generated according to the water level of the washing tank 16 through the rubber hose to change the reactance value (L) by moving the iron core in the coil (L ₁ ) (low water surface pressure) Since there is little, the iron core movement in the coil is small, so the L value is small, and when the pressure is large, the movement is large and the L value is large).

"가 변화하여 변화량이 카운터(201)를 통해 마이콤(100)의 단자(PO₁)에 입력되어 마이콤(100)은 수위를 인식하게 되는 것이다.Oscillation frequency (f) of the LC oscillation circuit composed of the coil (L ₁ ) and condensers (C ₁ -C ₃ )

&Quot; is changed and the amount of change is input to the terminal PO ₁ of the microcomputer 100 through the counter 201 so that the microcomputer 100 recognizes the water level.

However, in the conventional fully automatic washing machine, the laundry sensor is difficult to attach the magnet 19 and the coil 20 to the clutch pulley 18 and the clutch housing in the case of the rotation sensor 200, and the change in electromotive force is not constant. There was a problem that the fine adjustment is difficult. Accordingly, the above problems will be described with reference to the accompanying drawings the technical configuration of the laundry detection device of the washing machine according to the present invention to control.

FIG. 4 is a structural diagram of a washing machine including an agitator drive shaft according to the present invention. In FIG. 4, the primary drive shaft 2 'of the agitator 1 is formed of an iron core material capable of changing reactance components. The reactance L of the sensor coil 4 is changed by the shanghai-dong in 15). The stirrer (1) is configured to increase the radius (R) in order to receive the weight of the laundry and increase the washing efficiency, and to form a primary drive shaft composed of an iron core material so that the reactance (L) can be largely changed by magnetic induction ( 2 ') is connected to the stirrer secondary drive shaft 15 by springs 14 and 14', and in the case of washing, the primary drive shaft 2 'and the secondary drive shaft 15 are the washing shaft shafts of the clutch 9. Power is transmitted by the (13) and the power is transmitted by the stirrer fixing holder (2) connected to the stirrer (1) to rotate the stirrer (1), in the case of dehydration fixed shaft outer case (3) is the washing tank (16) Is connected to and is receiving power by the dehydration shaft 12 of the clutch 9 to turn the washing tank 16 to proceed with dehydration.

The dehydration shaft 12 does not rotate when the clutch lever 7 is fixed by moving the clutch lever 7 to the left by the force of the spring 14 when no power is supplied to the drain magnet 6. When the power is supplied to the magnet 6 and the clutch lever 7 is moved to the right by the electromagnetic force, the clutch boss 8 is rotated. At this time, the secondary drive shaft (15) and the fixed shaft outer case (3) is made of a rigid and flexible plastic material by the washing shaft shaft 13 or the deshrink shaft 12 during washing or dehydration The power is sufficiently transmitted and is not damaged during long-term use so that the magnetization force between the primary drive shaft 2 'and the sensor coil 4 is not disturbed. In addition, the sensor coil 4 is designed in a circular shape (in Fig. 4, the sensor coil is a cross-sectional side view of the circular shape).

The power of the motor 10 is transmitted to the clutch 9 by the V-belt 11, and the shapes of the primary drive shaft 2 ', the stirrer fixing holder 2 and the secondary drive shaft 15 are shown in FIG. As shown, the washing shaft shaft 13 is installed so as not to come into contact with the fixed shaft outer case 3 during rotation (to prevent friction during rotation), and the spring 14 is elastic so that the change width is constant according to the capacity of the laundry. Adjust the coefficient "500g-1kg".

"를(단, "C"는 콜피츠발진회로의 합성용량으로서

이다).Accordingly, depending on the amount of laundry, the primary drive shaft 2 'moves up and down within the secondary drive shaft 15, and as shown in FIG. 6, the resistors R ₁ -R ₄ and the capacitors C ₁ -C. ₃ ) and the reactance of the sensor coil 4 is changed in the Colpitts oscillation unit 210 composed of the transistor Q ₁ and the sensor coil 4.

Where "C" is the combined capacitance of the Colpitts oscillation circuit.

to be).

Input to the terminal (INT ₁ ) of the microcomputer (100). That is, the laundry detection device of the washing machine according to the present invention uses the Colpitts oscillation unit 210 in place of the conventional pressure sensor and the rotation sensor.

First, when the laundry is put into the washing tank 16 in FIG. 4 and the washing machine is operated, a force is applied to the stirrer 1 by the weight of the laundry, and at this time, the stirrer 1 and the primary drive shaft 2 '. Is lowered by a force proportional to the weight of the laundry, thereby changing the reactance (L) of the sensor coil (4), and accordingly the Colpitts oscillator (210) in Figure 6 reactance (L) of the sensor coil (4) The oscillation frequency f according to the change is input to the microcomputer 100 (INT ₁ ), and the microcomputer 100 detects the variation of the oscillation frequency f according to the change in the reactance L and detects the amount of laundry. .

After that, water is started according to the amount of laundry recognized and the course is selected. As the water supply proceeds, a change in the increased water pressure is applied to the stirrer 1, and the reactance L is changed according to the width of the change, and the oscillation frequency f according to the change in the reactance L is changed to the microcomputer 100. ) Recognize and control the water supply. When the water supply is completed, washing is started, and when the washing is completed, rinsing and dehydration are performed. At the time of dehydration, the microcomputer 100 operates the magnet 6 through the load driving circuit 170 to pull the clutch lever 7 to the right to proceed with drainage and is separated from the clutch boss 8 so that the clutch 9 can be removed. The contraction shaft 12 rotates at the same time, and the dehydration shaft 12 rotates so that the washing tub (ie, the dehydration tank) 16 connected thereto rotates to proceed with dehydration.

Therefore, the laundry detection apparatus of the washing machine according to the present invention can perform a precise operation using a weight sensor (Colpitts oscillation circuit) instead of the pressure sensor and the rotation sensor and has an effect that can be configured at a low cost.

Claims (2)

The stirrer is composed of a stirrer drive shaft unit for receiving the motor power from the washing shaft shaft 13 and transferring the motor power to the stirrer and changing the reactance of the sensor coil 4 according to the amount of laundry, and a sensor coil 4, a resistor, a condenser, and the like. Recognizes the amount of laundry from the oscillation frequency of the Colpitts oscillation unit and the oscillation frequency changed according to the reactance change caused by the magnetic induction from the drive shaft, and starts the water supply according to the recognized quantity of laundry to control the course progress. Laundry detection device of a washing machine including a microcomputer. The method of claim 1, wherein the stirrer drive shaft portion is coupled to the washing shaft shaft 13, the secondary drive shaft 15 receives the motor power, one side is coupled to the stirrer, the other side is movable up and down the secondary drive shaft The laundry detection device of a washing machine comprising a conductive primary drive shaft (2 ') guided and a spring (14) inserted between the primary drive shaft and the secondary drive shaft to impart a Shanghai simultaneous elasticity of the primary drive shaft.

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