KR900000056B1 - Washing machine - Google Patents

Abstract

The method includes a first process for supplying water, a second process for detecting the stoppage of the motor after driving the motor for a certain time when water supply is completed and for opening the motor circuit an displaying the stoppage, a third process for checking whether the time of compulsary motor driving exceeds a certain time, and a fourth process for deciding the washing completion when motor is stopped, for executing next process at washing completion and for forming an inverted current by reverse motor driving when the washing is not completed.

Description

Inverter Water Flow Formation of Washing Machine and Determination of Motor and Stirring Blade Restraint

1 is a block diagram according to the present invention.

2 is a detailed circuit diagram of an embodiment of the block diagram of FIG.

3a, b is a mounting view of the Hall sensor and the magnet according to the present invention.

4a, b is a state diagram of the inertia angle of the motor according to the laundry amount and quality.

5a and b are output waveform diagrams of a rotation angle measuring unit according to a change in water flow.

6 is a flow chart in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

10: start signal generator 20: controller

30: motor control unit 40: motor left and right signal simultaneous operation prevention unit

50: motor drive unit 60: rotation angle measurement unit

70: display unit

The present invention relates to a method for determining the inverter water flow of the washing machine and the method for determining the motor and the stirring blade, and in particular, by detecting the state of the inertia angle of the motor to form the inverter water flow for the washing quantity and quality, and determining whether the motor and the stirring blade are restricted. The present invention relates to a method for determining the inverter water flow and washing blade restraint of a washing machine.

In the water flow forming method of the conventional washing machine, the user has selected the appropriate water flow for the amount of laundry and the quality of the laundry to wash the laundry.

In addition, the water flow can be divided into river, medium, and weak in many cases according to the washing machine, but firstly, it is very difficult for the user to select the correct water flow for the washing amount and the quality of the laundry, Because it is classified as a group, it cannot be washed with the optimum water flow for washing quantity and quality, and at the same time, when the user incorrectly selects the water flow, the wear of clothes occurs, which causes a problem of lowering the cleaning efficiency.

Second, in the method of forming the reverse water flow for washing quantity and quality, it is impossible to form the optimum water flow for washing quantity and laundry quality by forming the inverted water flow at the set time by the timer, and at the same time, it imposes a burden on the motor by sudden inversion operation. There was.

Third, the safety problem has been raised due to a problem that may cause a fire by supplying power under a state in which the stirring blade and the motor are restrained.

Accordingly, an object of the present invention is to provide a method for forming an optimum inverter water flow by measuring the amount of washing and quality by measuring the inertia angle of the motor.

Another object of the present invention is to provide a method of measuring the inertia rotation of a motor to determine whether the motor and the stator blade are restrained and display the same.

The present invention for achieving the above object is a first step of generating a pulse according to the rotation of the motor to determine whether the restraint of the motor and agitator blades, and a second to search for the completion of washing after a predetermined time after the motor forced start Step and detecting the inertia of the motor in the state of forced motor stop, the washing amount and quality, and after stopping the moment of inertia rotation and forcibly inverting the motor when the inertia rotation reaches the stop point to form the inverter flow Characterized in three stages.

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

1 is a block diagram according to the present invention, which detects the initial operation signal and the water level in the washing tank, and outputs an initial operation signal and a water level detection signal, and a start signal generation unit 10. A control unit 20 for outputting a motor operation signal and a motor restraint signal after determining and inputting a signal and a motor rotation angle measurement signal to be described later, and a motor control unit for controlling and outputting a motor operation signal output from the control unit 20 ( 30 and the motor left and right simultaneous rotation prevention unit 40 for outputting a signal to prevent the left and right simultaneous rotation of the motor by inputting a motor control signal output from the motor control unit 30, and outputs from the motor control unit 30 Inputs a motor control signal to drive the motor according to the control signal and the motor drive unit 50, and by detecting the rotation of the motor by the drive of the motor driver 50 generates a predetermined pulse The emitter consists of a display unit 70 for displaying it to the input and the rotation angle measurement part 60 for generating a pulse due to the inertial angle when it stops, the motor constraining the signal from the control unit 20.

In the configuration, the control unit 20 is a microprocessor.

When the start signal is input to the controller 20 from the start signal generator 10, the controller 20 determines that the water supply starts and outputs the water supply signal to the motor controller 30.

At this time, the motor control unit 30 inputs the water supply signal to drive the water supply signal to the motor driving unit 50, and the motor driving unit 50 inputting the water supply control signal drives the water supply side to start water supply in the washing tank.

When the water supply to the predetermined water level in the washing tank is completed, the start signal generating unit 10 detects this and outputs a water supply completion signal to the control unit 20. The control unit 20 inputs the water supply completion signal to the motor for a predetermined time. Outputs a motor operation signal that can be operated to rotate left or right to the motor control unit 30.

In addition, the motor control unit 30 inputs the motor operation signal output from the control unit 20 drives the motor operation signal to the motor left and right simultaneous rotation prevention unit 40 and the motor driving unit 50.

The motor left and right simultaneous rotation prevention unit 40 inputs the motor control signal output from the motor control unit 30 monitors the motor control signal and when the left and right rotation control signals are simultaneously output from the motor control unit 30, the motor driving circuit 50. ) Outputs a signal to block the motor operation signal output from the drive.

On the other hand, the motor driving unit 50 in which the predetermined time output from the motor control unit 30 inputs the motor control signal drives the motor by the motor control signal.

At this time, the rotation angle measuring unit 60 detects the rotation angle of the motor rotating for a predetermined time by driving the motor driving unit 50 to generate a pulse, and detects the inertia angle according to the washing amount and quality and outputs a pulse signal. .

That is, the rotation angle measuring unit 60 outputs a pulse signal having a different cycle depending on the rotation of the motor by inertial rotation to the controller 20.

The controller 20 which inputs the pulse signal output from the rotation angle measuring unit 60 determines that the inertia rotation is stopped when it is determined that the period of the pulse due to the inertia rotation is longer than a predetermined period, and is inverted from the previous forced rotation signal. The motor operation signal capable of operating is output to the motor controller 30.

On the other hand, if the pulse signal is not output from the rotation angle measuring unit 60, the control unit 20 stops output of the motor operation signal and outputs and displays the motor restraint signal on the display unit 70 to indicate that the current motor is being restrained. Can be.

The motor controller 30 inputs the motor inversion operation signal output from the controller 20, and the motor driving unit 50 and the motor left and right simultaneous operation prevention unit as described above output the motor rotation signal opposite to the previously output motor operation signal. Drive to (40).

At this time, the motor left and right simultaneous operation prevention unit 40 prevents the left and right simultaneous operation of the motor as described above, and the motor driving unit 50 rotates the motor by a drive signal opposite to the previous motor rotation.

In addition, the motor driving unit 50 is the rotation of the motor by the drive is detected by the rotation angle measuring unit 60 and when the stop point of inertia rotation is detected, the control unit 20 is a motor operation signal that can drive the motor back to the motor By outputting to the control part 30, the inverter water flow corresponding to a washing | cleaning amount and a quality is formed.

FIG. 2 is a specific circuit diagram of an embodiment of the block diagram of FIG. 1, which includes a switch SW1-SW2, resistors R1-R2, and capacitors C1-C2, and a controller 20. FIG. ), The motor control unit 30 composed of the resistors R8-R12 and the inverter circuit 31, the motor left and right simultaneous operation prevention unit 40 composed of the resistors R6-R7 and the transistor Q1, and silicon rectification. Silicon Controlled Rectifier (hereinafter referred to as SCR) (SCR1-SCR4), motor driver 50 composed of capacitor (C6), motor (MR) or solenoid (DV, WV), and resistor ( Rotation angle measuring unit 60 composed of R3, capacitor C3, and angle detecting unit 61, and display unit 70 composed of resistors R4-R5 and light emitting diodes LED1-LED2.

In the above configuration, MR and ML are solenoids for rotating the motor 100 of FIG. 3A to the right and left, and DV and WV are solenoids for driving the drain and water supply sides.

(DV and WV are called drainage and feedwater).

Figure 3a, b is a view showing that the Hall sensor and the magnet is mounted according to the present invention, Figure 4a, b is a diagram showing the inertia rotation state of the motor according to the amount and quality of laundry.

5a and b are output waveform diagrams of the rotation angle measuring unit according to the water flow change, and FIG. 6 is a flowchart according to the present invention.

Hereinafter, a second diagram of the present invention will be described in detail with reference to the drawings and the configuration described above.

When the switch SW1 is pressed now, the "on" signal of the "high" level is input to the input terminal IN1 of the control unit 20.

At this time, the control unit 20 outputs a signal of “high” to the output terminal OUT4 in the process of FIG. 6A to perform the washing operation after determining that the operation is started, and then the inverter circuit 31 inverts this to “low”. The signal is input to the input of the gate of SCR4 through the resistor (R12).

Therefore, the SCR4 is "turned on" and thus the water supply valve WV is "on" to start water supply in the washing tank 120 of FIG. 3a.

At this time, when the water level in the washing tank 120 reaches the set level, the switch SW2 connected to the pressure sensor 117 is turned on because the water pressure through the hose 121 increases, and the water supply completion signal is controlled. Output to the input terminal (IN2) of.

The control unit 20 which inputs the water supply completion signal to the input terminal IN2 determines that the water supply is completed in FIG. 6B and outputs a signal of “low” to the output terminal OUT4 in FIG. 6C to stop water supply. In order to perform the next stroke, which is a washing stroke, the signal "high" is transferred to the input terminal P1 of the inverter circuit 31 for a predetermined time (T seconds) as shown in FIG. Output

On the other hand, the control unit 20 that outputs the logic “high” for the forced start of the motor 100 to the output terminal OUT1 (or OUT2) in FIG. 6D process the hall sensor 61 to the terminal IN3 in step 6e. Search if there is a sequence pulse.

If the sensor pulse does not exist even though the motor forced start signal is output, the motor 100 and the stirring blade 116 are determined to be in a restrained state and the motor forced start outputs to the output terminals OUT1 (or OUT2) in step 6j. Cut off the signal.

The low signal is alternately output to the output terminals DIS1 and DIS2 to display an error in 6k.

That is, it indicates that the motor 100 is restrained.

If it is determined in step 6e that the sensor pulse is input, the control unit 20 searches whether the forced start signal output has elapsed by "T" seconds in step 6f, and outputs a motor start signal until T seconds is reached.

If the forced start signal is output for T seconds, the control unit 20 outputs the motor off signal in step 6g, and searches whether the washing time set by the timer is completed.

If the washing is not completed in step 6g, it is checked whether the inertia rotation is stopped in step 6i.

The inverter circuit 31 which inputs the "high" signal output from the control unit 20 to drive the solenoid ML is inverted to the "low" signal and output to the gate of SCR1 through the resistor R8 to SCR1. "Turn on".

This causes the solenoid ML to be " turned on " to turn left the motor 100 of FIG.

At this time, the cooling fan 111 is also forcedly rotated for a predetermined time (T seconds) by the rotation of the motor 100, and at the same time, the M-type dotre 113 and the V-type are rotated by the rotation of the motor 100. Through the belt 114 and the V-shaped dotre 115, the stirring blade 116 is forced to rotate for a predetermined time (T seconds).

At this time, four magnets (M1-M4) are mounted on the cooling pen 111 bearing the rotation shaft of the motor 100 at intervals of 90 ° angles as shown in FIG. 3B to detect the stop of inertia rotation. Magnets of the sensor holder 118 attached to the saddle 119 when the motor 100 is forcibly rotated for a predetermined time (T seconds). Whenever orthogonal to the magnet sensor 112, the Hall sensor 61 detects this and outputs a signal of “low” to the input terminal IN3 of the controller 20.

At this time, even if the motor 100 is "off" after the forced rotation for a predetermined time (T seconds), the stirring blade 116 and the motor 100 are inertial rotation by the inertia law.

When the washing tank has a large amount of washing and when the washing amount is thick, the inertia angle of the motor 100 has a low rotation angle as shown in FIG. 4A, and the washing amount in the washing tank 120 is small or the quality of the laundry is thin. It can be seen that the inertia rotation angle is large as shown in FIG. 4b when the clothes are small in degree 4b or the clothes are thin (Ddelicate).

Therefore, the angle detecting unit 61 controls the signal of "high" when the magnet M1-M4 of the cooling pen 111 rotating by inertial rotation is orthogonal to the Hall sensor 61, and "high" when it is out of control. ) Is input through the input terminal IN3.

At this time, if the state signal of "high" input to the input terminal IN3 is maintained for more than "X" seconds, the controller 20 determines that the inertia rotation has been stopped in FIG. 6i, and the controller 20 jumps to the process 6d. To output a high signal for a predetermined time (T seconds) to the output terminal OUT2.

It is inverted to " low " by the inverter circuit 31 and is input to the gate signal of SCR2 through resistors R9 and R10.

The SCR2 inputting the "low" signal output from the inverter circuit 31 is "turned on" and thus the solenoid MR is also "on" so that the motor 100 is forcibly turned right for "T" seconds.

In FIG. 6, the control unit 20 outputting the motor forced start signal in step 6d performs steps 6e, 6f, and 6g to search whether the motor 100 is confined and when the washing is completed.

Meanwhile, as described above, the inertia rotation after the forced rotation of the motor rotating for the predetermined time (T seconds) is detected by the rotation angle hall sensor 6l, and the rotation angle measurement signal is "high" for "X" seconds. When the signal is input to the terminal IN3, the controller 20 determines that the inertia rotation is stopped in the process of FIG. 6I.

The control unit 20 determines that the inertia rotation is stopped, and outputs a signal of "high" to the output terminal OUT1 to develop the motor 100 by the above-described process so that water flow according to the washing amount and quality is formed.

The change in the formation of the water flow according to the washing amount and the laundry quality is explained with reference to the waveform diagram of FIG. 5. As shown in (a) of FIG. 5A, a "high" signal is controlled for a predetermined time (T seconds). When output from the output terminal (OUT1) of SCR1 and the solenoid (ML) is "turned on" and forcibly starts the motor for a predetermined time, the pulse output from the hall sensor (6l) is the same as the time (t) Regardless, they appear constant.

If the solenoid ML is "off" after a predetermined time (T sec.) Has elapsed, the output of the hall sensor 6l when the load is heavy or thick is "X" because the inertia angle is small as described above. The time (stop point of inertia rotation) is maintained for "X" seconds after "t" is taken.

At this time, after determining that the inertia rotation is stopped, the control unit 20 outputs the motor inversion operation signal to the output terminal OUT2 for a predetermined time (T seconds) to turn on the SCR2 and the solenoid MR.

Therefore, since the "off" time after the forced start of the motor 100 for a predetermined time is short, water flow is strongly generated, and the cleaning is well performed.

On the contrary, when the amount of washing is small and the laundry is delicated, if the motor is forced to the left for a predetermined time (T seconds) as shown in FIG. 5B, the motor forced start time (T seconds) as described above. When the motor is "on", the output of the hall sensor 6l is output at a constant cycle pulse regardless of the washing amount and the quality of washing.

If the motor 100 is " off " after operating the motor for a predetermined time (T seconds), the inertia angle becomes longer as described above in FIG. 4B, whereby the output " high " of the hall sensor 6l is output for X seconds. The stopping point of the inertia rotation that appears is as late as Δt + α.

Therefore, when the control unit 20 recognizes the stop point of inertia rotation appearing as late as + α, the motor inverting operation signal is output to the inverter circuit 31 to invert the motor 100 so that the off-new signal of the motor 100 is? T. + α becomes longer by + α seconds than thick clothes and large amounts of laundry, so the flow of water is weakened to remove wear of the laundry material.

On the other hand, although the control unit 20 outputs a "high" signal to the output terminals OUT1 or OUT2 to drive the SCR1 or SCR2 and the solenoid ML or MR, if no pulse is generated from the hall sensor 61, the controller ( 20 determines that the motor 100 and the stirring blade 116 are restrained, and outputs a predetermined signal alternately to the output terminals DIS1 or DIS2 to emit and display the light emitting diodes LED1-LED2, and simultaneously output the output terminals ( OUT1-OUT2) to stop the motor rotation by blocking the "high" signal.

Therefore, the present invention is to control the motor at the time when the other inertia rotation stops according to the amount of laundry, the amount of laundry to form the water flow according to the amount of laundry.

As described above, the present invention changes the rotational direction of the motor at the point of stop of the inertia rotation angle, which is changed according to the washing amount and quality, thereby generating an optimum water flow corresponding to the washing amount and quality, thereby making the washing efficiency optimal. By controlling the motor by determining whether the stirring blade of the motor is restrained as a pulse by the rotation of the motor, there is an advantage of escaping the risk of fire.

Claims (1)

The rotation angle measurement unit 60 detects the rotation of the motor and outputs the rotation pulse of the motor by the rotation drive control and the inertia rotation stop pulse of the motor by blocking the drive control, and the rotation angle by controlling the rotational drive of the motor. In the method of determining the inverter water flow and the motor and stirring blade restraint of the washing machine having the control unit 20 which alternately controls the rotation of the motor by the inertial rotation stop pulse of the measuring unit 60, in the washing tank for washing. A first step of supplying water, and a second step of determining whether the motor is restrained as a pulse by forcibly starting the motor for a predetermined time when water supply is completed in the first step, and simultaneously displaying the motor off when the water is restrained; A third step of determining whether the time for forcibly starting the motor in the second step is a predetermined time; and when the motor is turned off in the third step, the washing completion is applied. However if the time of completion of the method, characterized in that to detect the next inertia rotation at the same time or is completed, at which ever embodiment the stroke consists of a fourth step of forming a motor reversing sikieo inverter current reaches the stopping point.

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