KR19980036260A - Washing machine driving control method - Google Patents

Abstract

The present invention relates to a washing machine operation control method, and the amount and quality detection step for detecting the amount and quality of the laundry, and washing and rinsing administration to perform the washing and rinsing administration and drain according to the detected quantity and quality of the laundry Detects the imbalance and overload of the laundry, performs loosening, dehydrating stroke, and simple dehydrating stroke according to the imbalance and overload of the laundry, and then the remaining stroke consists of the dehydrating stroke performing step, and the pulse signal from the tachometer 34 By detecting the quantity, quality, imbalance and overload using the pulse width and the number of pulses, the quantity, quality, imbalance and overload of the laundry can be detected quickly and accurately, and the washing machine is controlled according to the detected data. In addition to preventing the overload of the washing machine drive motor (6) is to optimize the washing performance.

Description

Washing machine driving control method

The present invention relates to a washing machine operation control device and a control method thereof, by accurately detecting a load, an imbalance, an overload, etc. of laundry, and controlling the operation of the washing machine according to the detected laundry information to perform washing and dehydration strokes. And a washing machine operation control method of optimizing washing performance by reducing errors in the dehydration stroke.

In general, the internal structure of a conventional washing machine, as shown in Figure 1, the outer tub 4 is mounted in the washing machine body 2, the drive motor 6 is mounted on the outer bottom surface of the outer tub 4 The center of the outer bottom surface of the outer tub 4 is equipped with a power transmission means 10 which receives the power of the drive motor 6 via the belt 8 and is interlocked.

And, the front end of the power transmission means 10 is equipped with a washing and dehydration tank 12 in the outer tub 4 so as to perform the dehydration while being rotated by receiving power, the bottom in the washing and dehydration tank 12 While receiving power from the power transmission means 10, the stirring means 14 for stirring and washing by applying a physical force to the laundry while turbulizing the flow of the washing water in the washing and dewatering tank 12 while It is installed.

On the other hand, the right side of the washing machine body 2 is equipped with a water supply means 16 for supplying the wash water into the washing and dehydration tank 12, the lower side of the washing water in the washing and dehydration tank 12 The drainage means 18 for draining to the outside is mounted, the lower end of the water supply means 16 is dissolved in the detergent supplied by the water supply to the outer tub 4 and the washing and dehydration tank 12 together with the wash water. Detergent dissolution means 20 for supplying the inside is mounted.

In addition, a predetermined rinsing stroke, a dehydrating stroke, and a washing stroke are selected at predetermined upper portions of the washing machine main body 2, and washing time and reservation time, rinsing frequency, and washing type (for example, cotton and nylon) are selected. An operation means 22 having a selection key and a start key is mounted, and a water level sensing means for sensing the level of the washing water filled in the washing-and-dehydrating tank 6 in a predetermined portion of the washing machine main body 2 ( 24) is installed.

With reference to Figures 1 and 2 will be described in more detail with respect to the operation of the washing operation of the conventional washing machine and the load of the washing machine of the conventional washing machine consisting of the above-described components.

First, the user opens the upper cover of the washing machine body 2, and puts laundry into the washing and dehydrating tank 12, and then through the operating means 22 the desired washing course (for example, rinsing stroke, dehydration stroke, Washing cycle, washing time, reservation time, rinsing frequency, etc.), and then pressing the start key provides a corresponding key signal from the operating means 22 to the control means 26.

Then, when the washing administration key signal from the operation means 22 is input to the control means 26, the control means 26 first abbreviated as the amount of laundry to be put into the washing and dehydration tank 12 ) And the type of laundry (e.g. cotton, nylon, etc .; abbreviated as the following).

The method of detecting the quantity of water is controlled by the control unit 26 to operate the drive motor 6 to increase the speed of the washing and dehydration tank 12 into which the dry laundry is put, to about 800rpm, the power supplied to the drive motor 6 Blocking and measuring the amount of time that the rotational speed of the drive motor 6 falls to the reference speed to detect the quantity.

At this time, the rotational speed of the drive motor 6 is measured by the tachometer 34 is input to the control means 26, the control means 26 in accordance with the signal input from the tachometer 34 It is to control the speed of the drive motor (6).

Then, the control means 26 detects the amount of water as described above and then performs the washing operation.

That is, the water supply valve is opened through the water supply control unit 28 in the water supply means 16 by the water supply control signal of the control means 26, and the washing water passes through the detergent dissolving means 20 through the water supply valve. Is dissolved in the wash water, and then supplied into the washing and dehydration tank 12, the washing water in which detergent is dissolved is filled in the washing and dehydration tank (12).

At this time, when the washing water filled in the washing and dewatering tank 12 is detected enough water level to perform the washing through the water level detecting means 24, the water supply means 16 by the water supply control signal of the control means 26 Water supply valve is blocked through the water supply control unit 28 in the) to block the wash water supplied from the water supply means (16).

Then, the triac 32 is turned on by the drive control signal from the control means 26, and a commercial AC power supplied from the outside is provided to the drive motor 6, and driven by the commercial AC power. The motor 6 is driven, the driving force of the drive motor 6 is transmitted to the power transmission means 10 via the belt 8, and then the stirring means 14 receiving the power of the power transmission means 10. While the left and right reversed, the flow of the wash water filled in the washing and dehydration tank 12 becomes turbulent and at the same time, a physical force is applied to the laundry to wash the laundry.

In addition, the method for detecting the quality of the foam is determined according to the amount of water level change in the washing and dehydration tank 12 that is detected through the water level detecting means 24 after a predetermined time (for example, 2 minutes) has passed through the washing administration. Determine.

For example, if the laundry is cotton, the washing water absorbed by the cotton laundry is large, so that the amount of change of the washing water detected through the water level detecting unit 24 is large, and when the laundry is nylon, the washing water absorbed by the nylon laundry is Since it is relatively small, since the amount of change in the wash water detected by the water level detecting means 24 is small, the control means detects the quality of the laundry through the amount of change in the wash water.

On the other hand, the drainage valve is opened through the drainage control unit 30 in the drainage means 18 by the drainage control signal of the control means 26 at the time of drainage, and the contaminated water of the washing and dewatering tank 12 is washed through the drainage valve. The wastewater absorbed by the laundry by the centrifugal force of the washing and dewatering tank 12 is collected to the lower side of the washing and dewatering tank 12 and drained to the outside through the drainage means 18.

Then, at the time of the rinsing stroke, the drain valve is closed through the drain control unit 30 in the drain means 18 based on the drain block control signal and the feed water control signal of the control means 26, and at the same time the water supply means 16 When the water supply valve is opened through the water supply control unit 28 inside, and the new washing water is supplied from the water supply means 16 to the washing and dewatering tank 12, the rinsing water is turbulent through the same operation process as the above-described washing process. Residual detergent residue and residual contaminated water are washed.

After this rinsing stroke, the drain valve is opened through the drain control unit 30 in the drain means 18 based on the drain control signal from the control means 26 to drain the contaminated water of the washing and dehydration tank 12 to the outside. Will be.

On the other hand, during the dehydration administration, the driving force of the drive motor 6 is transmitted to the power transmission means 10 via the belt 8, the washing and dewatering tank 12 is driven by the power transmission means 10. By rotating at high speed, the rinsing water remaining in the laundry is dehydrated.

When the dehydration administration is performed as described above, when the washing and dehydration tank 12 is biased in one direction according to the load of the laundry loaded into the washing and dehydrating tank 12, an unbalanced rotation of the washing and dehydrating tank 12 is caused to cause washing and dehydration. When the tank 12 and the washing machine main body 2 collide with each other, a loud noise may be generated or parts may be damaged.

Therefore, during dehydration, the imbalance of the laundry is sensed, and if the imbalance is unbalanced, the loosening stroke is performed. In the method of detecting the unbalance of the laundry, the control means 26 rotates the speed of the driving motor 6 to about 90 rpm, The overload and the imbalance of the laundry in the washing and dewatering tank 12 are determined by measuring the speed change width of the drive motor 6 at this speed.

In the conventional washing machine driving control apparatus and method thereof, not only it takes a lot of time to detect the amount of laundry, the quality of the laundry, there is a problem that the accuracy is poor.

That is, in the case of dry laundry in the method of detecting a quantity of water, since the weight thereof is light, an error of the quantity of detection is generated because the characteristics of the driving motor 6 and the tension of the belt 8 may be affected. There is a problem.

In addition, after performing the washing administration for a certain time to detect the quality of the laundry, as well as taking a lot of time to measure the quality according to the level of the washing and dehydration tank 12, the water level due to the wavelength generated by the washing administration Since it is difficult to accurately detect the water level because of fluctuations, it was difficult to accurately detect the quality of the foam.

The present invention has been made in view of the problems of the prior art as described above, by improving the method for detecting the overload of the laundry, and the amount, quality, imbalance, etc. of the laundry to accurately detect the overload, quantity, quality, imbalance, etc. The purpose of the present invention is to provide a washing machine driving control method for optimizing washing performance by controlling the driving of the washing machine according to the detected data.

Washing machine operation control method according to the present invention for achieving the above object, in the washing machine operation control method for driving the washing machine according to the selected washing course, washing water detection step of detecting the presence or absence of the initial washing water in the washing and dehydration tank And, if the initial washing water in the washing water detection step, the step of draining the initial washing water and then considering the laundry as the maximum amount of water, if the initial washing water in the washing water detection step detects whether the laundry is overloaded A first overload detection system that considers the laundry as a maximum amount of load if it is overloaded, a step of detecting a quantity of the laundry if the laundry is not overloaded in the first overload detection step, and a quality detection for detecting the quality of the laundry And washing and rinsing according to the detected amount and quality of the laundry. Performing washing and rinsing administration steps, an imbalance detection step of detecting whether the laundry is imbalanced, and if the laundry is imbalanced, an unwinding stroke is performed until the imbalance of the laundry is resolved within a predetermined number of times, and the loosening stroke is performed. If the imbalance of the laundry is not resolved even after a predetermined number of times, a step of performing a residual stroke and considering a balance error, and a second overload detection for detecting whether the laundry is overloaded if the laundry is not imbalance in the imbalance detection step. A step of performing a dehydration stroke and a remaining stroke if the laundry is not overloaded in the second overload detection step; and if the laundry is overloaded in the second overload detection step, the overload of the laundry is released within a predetermined number of times. The laundry is dehydrated briefly until the simple dehydration stroke For the working-up by a washing machine operation control method, it characterized in that the laundry is overloaded is made to a step regarded as an overload error, and performs the remaining stroke.

1 is a view for explaining the internal structure of a conventional washing machine,

2 is a schematic block diagram of a conventional washing machine driving control apparatus;

3 is a schematic block diagram of a washing machine driving control apparatus to which a washing machine driving control method according to the present invention is applied;

4 is a waveform diagram of a pulse output from the tachometer of FIG.

5 is a flowchart of a washing machine driving control method according to the present invention;

6 is a view for explaining the operation of detecting the overload of the laundry according to the invention,

7 to 8 are views for explaining an operation process for detecting the amount and quality of laundry laundry,

9 is a view for explaining the operation of detecting the imbalance of the laundry according to the invention.

* Description of the symbols for the main parts of the drawings *

2: washing machine body 4: outer tank

6: drive motor 8: belt

10: power transmission means 12: washing and dehydration tank

14: stirring means 16: water supply means

18 drainage means 20 detergent dissolving means

22: operation means 24: water level detection means

(26, 36): control means 28: water supply control unit

30: drain control unit 32: triac

34: tachometer

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

3 is a schematic block diagram of hardware for performing a load sensing method of a washing machine according to the present invention, the operation means 22, the water level detection means 24, the water supply control unit 28, the drain control unit 30, It consists of a triac 32, a drive motor 6, a tachometer 34 and a control means 36.

On the other hand, the operating means 22, the water level detection means 24, the water supply control unit 28, the drain control unit 30, the triac 32, among the components of the hardware for performing the washing machine operation control method according to the present invention, Since the drive motor 6 and the tachometer 34 perform substantially the same functions as the constituent members of the washing machine driving control apparatus according to the related art described above, the description herein will be omitted to avoid overlapping substrates.

Therefore, the constituent members of the hardware for performing the washing machine driving control method according to the present invention are different from the constituent members of the washing machine driving control device according to the prior art, and the control means 36 is used.

An operation process of the washing machine driving control method according to the present invention through the hardware having the configuration as described above will be described in more detail with reference to FIGS. 1 and 3 to 9.

First, the user opens the upper cover of the washing machine body 2, and puts laundry into the washing and dehydrating tank 12, and then through the operating means 22 the desired washing course (for example, rinsing stroke, dehydration stroke, After selecting the washing administration, washing time, reservation time, rinsing frequency, etc. (step 502), when the start key is pressed, a corresponding key signal is supplied from the operating means 22 to the control means 26 (step 504). .

Then, the control means 26 generates each control signal for washing the laundry to the washing course selected according to the internal washing program corresponding to the start key signal from the operating means 22.

At this time, the control means 36 checks whether there is washing water in the washing and dewatering tank 12 through the water level detecting means 24 (step 506). When it is detected that there is washing water in the washing and dewatering tank 12 through the water level detecting means 24, the control means 36 generates a control signal for draining the washing water in the washing and dewatering tank 12, The quantity of laundry is considered as the maximum quantity.

Therefore, the drain valve is opened through the drain control unit 30 in the drain means 18 by the drain control signal of the control means 36, and the wash water of the washing / dehydrating tank 12 is discharged to the outside of the washing machine through the drain valve. It is drained (step 508), and the quantity of laundry is considered as the maximum quantity (step 510).

On the other hand, if the washing water is not detected in the washing and dehydration tank 12 as a result of the check in step 506, the control means 36 detects the overload of the washing and dehydration tank 12 (step 512), the overload detection The method is as shown in FIG. 6.

As can be seen with reference to FIG. 6, the triac 32 is turned on by the drive control signal from the control means 36, so that a commercial AC power is provided to the drive motor 6 from outside. The drive motor 6 is driven by a commercial AC power source, wherein a pulse signal output from the tachometer 34 is provided to the control means 36 according to the rotational speed of the drive motor 6, and the control means 36. ) Is to know the speed of the driving motor 6 by calculating the number of pulses of the input pulse signal for a certain time.

On the other hand, if the speed of the drive motor 6 provided through the tachometer 34 is a predetermined RPM (A shown in Fig. 6), the control means 26 turns the triac 32 off to drive the drive motor. Cut off the AC power supplied to the (6), and at this time, the time required for the timer in the control means 26 to reduce the speed of the drive motor 6 detected through the tachometer 34 to the predetermined RPM Check it.

In Fig. 6, the solid line indicates the time required in the steady state, and the dotted line shows the time required in the overloaded state, and it is easy to see that the required time in the case of overload is longer than the required time in the case of normal. Able to know.

The overload is sensed in the same manner as described above (step 512), and if the detection result is an overload, the control means 36 then regards the laundry as the maximum quantity (steps 514 and 510).

On the other hand, if the laundry is not overloaded as a result of the detection at step 514, the control means 36 detects the quantity of laundry (step 516).

A method of detecting the amount of laundry as described above is described below with reference to FIG. 7.

In FIG. 7, ML means driving in the left direction of the drive motor 6, and MR means driving in the right direction of the drive motor 6, respectively.

First, the water supply valve is opened through the water supply control unit 28 in the water supply means 16 by the water supply control signal of the control means 36, and the washing water passes through the detergent dissolving means 20 through the water supply valve. After dissolving in the wash water, the washing and dehydration tank 12 is supplied into the washing and dehydration tank 12 to fill the washing and dehydration tank 12.

Subsequently, the water supply valve is blocked through the water supply control unit 28 in the water supply means 16 by the water supply shutoff control signal of the control means 36, and the wash water supplied from the water supply means 16 is blocked.

Then, the triac 32 is turned on by the drive control signal from the control means 36, and a commercial AC power supplied from the outside is provided to the drive motor 6, and driven by the commercial AC power. The motor 6 is reversed left and right and driven at a predetermined rpm (C rpm shown in FIG. 7).

At this time, the pulse signal is output to the control means 36 according to the rotational speed of the driving motor 6 detected through the tachometer 34, and the control means 36 outputs the input pulse signal for a predetermined time for a unit time. For example, a pulse width is checked every tens of msec, and a predetermined number of pulses having a large pulse width are sequentially taken, and a predetermined number of pulses having a small pulse width are sequentially taken to calculate an average value.

Subsequently, the calculated average value is compared with the reference value, and then the quantity is detected using the comparison value as a measure.

That is, when the calculated average value is larger than the reference value, the amount of dose is smaller, and when the calculated average value is smaller than the reference value, the amount of dose is increased.

Here, while the water supply to the washing and dehydration tank 12 step by step (appropriately three stages) for the accuracy of the measurement of the amount of water, through the above-described operation process to accurately detect the amount of laundry put into the washing and dehydration tank 12 do.

At this time, the reference value compared with the average value calculated after the first, second, and third water supply is different, and as the amount of water absorbed by the laundry increases, the width of the pulse signal output from the tachometer 34 decreases, The reference value has a smaller value as the above steps are repeated.

After detecting the amount of water as described above, the control means 36 detects the quality of the foam (step 517), the method for detecting the quality of the foam, as shown in FIG. Since there are many, the amount of change in the pulse width input to the tachometer 34 after the 1st to 3rd water supply changes rapidly compared with the reference pulse width change amount (dotted line in FIG. 8) (dashed line in FIG. 8), and the laundry is nylon In this case, since the absorption amount of the washing water is small, the pulse width input through the tachometer 34 after the first to third water supply is smaller than the reference pulse width (dotted dashed line in Fig. 8). 8, solid line).

Then, the control means 36 sets an appropriate water level and water flow time according to the detected amount and quality of the laundry, generates a control signal for performing the washing stroke and the rinsing stroke according to the set water level and water flow time, and the control means. In accordance with the control signal (36), the washing stroke and the rinsing stroke as described above are performed and then drained (steps 518 and 520).

Subsequently, the control means 36 detects an imbalance of the laundry in the washing and dewatering tank 12 (step 521). The method of detecting the imbalance of the laundry is as shown in FIG.

In detail, the control means 36 drives the driving motor 6 by turning the triac 32 on, and the speed of the driving motor 6 sensed by the tachometer 34 is a predetermined speed ( When B) shown in FIG. 9 is reached, the control means 36 subtracts the reference number from the number of pulses output from the tachometer 34 during the unit time (for example, several tens of msec) during the left and right driving of the drive motor 6. Then we calculate the absolute value and accumulate it. By comparing the accumulated value with the reference value, if the accumulated value is equal to or greater than the reference value, the laundry is unbalanced (step 522).

In FIG. 9, the solid line shows that the laundry is balanced in the washing and dehydrating tank 12, and the dotted line shows that the laundry is imbalanced in the washing and dehydrating tank 12, respectively.

On the other hand, when the imbalance detection result of the control means 36 in step 522, the laundry in the washing and dewatering tank 12 is unbalanced, the control means 36 performs the loosening stroke for a predetermined number of times until the imbalance is resolved. (Step 524, 526), and if the laundry is unbalanced in the washing and dewatering tank 12 even after performing the unwinding stroke for a predetermined number of times, the control means 36 considers an unbalance error (ERROR) and the remaining stroke for the end of washing ( For example, the operation for generating the alarm sound and power off for the end of the washing is performed (steps 528, 540).

On the other hand, if the imbalance detection result of the control means 36 in step 522, the laundry in the washing and dewatering tank 12 is balanced, the control means 36 detects the overload of the laundry as in step 512 (Step 529), it is determined whether the laundry is overloaded (step 530). If the laundry is overloaded, the control means 36 performs the simple dewatering stroke for a predetermined number of times until the laundry is overloaded (steps 534, 536). If the laundry is overloaded even after performing the simple dehydration stroke for a predetermined number of times, the control means 36 considers the overload error ERROR to perform the remaining stroke for ending the washing administration (steps 538 and 540).

On the other hand, if the laundry is not overloaded at step 530, the control means 36 performs the normal dehydration operation and then performs the remaining stroke for the end of the washing (steps 532 and 540).

As described above, the imbalance of the laundry is an imbalance of the laundry by subtracting the number of pulses of the pulse signal output from the tachometer 34 and then taking an absolute value and accumulating it, and comparing the accumulated value with a set reference value. To detect.

Therefore, when the present invention is used, the washing machine is driven by controlling the washing machine according to data such as the overload of the laundry and the amount, quality, imbalance, etc. of the laundry and detecting the overload, quantity, quality, and imbalance. Not only can the motor be overloaded, but the washing performance can be optimized.

Claims (7)

In the washing machine operation control method for driving the washing machine according to the selected washing course, A quantity and quality detection step of sensing the quantity and quality of the laundry; A washing and rinsing administration performing step of performing a washing and rinsing stroke and then draining the laundry according to the detected quantity and the quantity of the laundry; Washing machine operation characterized in that it consists of a dehydration administrative step of detecting the imbalance and overload of the laundry, and performing a loosening stroke, a dehydrating stroke, a simple dehydrating stroke according to the detected imbalance and overload of the laundry Control method. The method of claim 1, wherein the amount and the quality detection step, Washing water detection step for detecting the presence of the initial wash water in the washing and dehydration tank; If the initial wash water in the washing water sensing step, draining the initial wash water and then considering the laundry as the maximum amount of water; A first overload detection step of detecting whether the laundry is overloaded if the initial washing water is not present in the washing water detection step and considering the laundry as a maximum quantity if the laundry is overloaded; Detecting a quantity of laundry if the laundry is not overloaded in the first overload detection step; Washing machine operation control method characterized in that consisting of a foam detection step for detecting the quality of the laundry. The method of claim 2, wherein the first overload detection step, Supplying power to the washing machine driving motor to drive the washing machine at a predetermined speed, and then cut off the power; Measuring a time taken for the washing machine driving motor to decrease in speed to a predetermined speed; And comparing the measured value with a set reference value and determining that the measured value is greater than the reference value as an overload. The method of claim 2, wherein the quantity detection step, Supplying a predetermined amount of water into the washing / dehydrating tank and then driving the washing machine driving motor to rotate the washing-and-dehydrating tank left and right; Taking a predetermined number of pulses output from the tachometer every predetermined time while the washing and dehydrating tank is rotated left and right; Calculating a mean value of pulse widths by taking a predetermined number of pulses sequentially from the pulses having the largest pulse width among the taken pulses, and simultaneously taking a predetermined number of pulses having the smallest pulse width from each other; And comparing the average value with the set reference value, when the average value is larger than the reference value, when the average value is smaller than the reference value, determining that the amount is larger. The method of claim 2, wherein the material detection step, Supplying a predetermined amount of water into the washing / dehydrating tank and then driving the washing machine driving motor to rotate the washing-and-dehydrating tank left and right; Taking a predetermined number of pulses output from the tachometer every predetermined time while the washing and dehydrating tank is rotated left and right; Calculating a mean value of the pulse widths semicircularly by taking a predetermined number of pulses sequentially from the pulses having the largest pulse width among the pulses taken; And comparing the calculated change amount of each average value with a set reference change amount and detecting the quality of the laundry according to the comparison result. The method of claim 1, wherein the dehydration administrative step, An imbalance detection step of detecting whether the laundry is imbalanced; If the laundry is unbalanced, the unwinding administration is performed until the unbalance of the laundry is solved within a predetermined number of times. Performing a residual stroke for; A second overload detection step of detecting whether the laundry is overloaded if the laundry is not imbalance in the imbalance detection step; Performing a dehydration stroke and a remaining stroke if the laundry is not overloaded in the second overload detection step; If the laundry is overloaded in the second overload detection step, the laundry is easily dehydrated within a predetermined number of times until the overload of the laundry is resolved, and if the laundry is overloaded, even if the laundry is overloaded, the overload error is regarded as an overload error. Washing machine operation control method characterized in that consisting of a step of performing the remaining stroke for the end of the washing administration. The method of claim 6, wherein the imbalance detection step, Raising the washing machine driving motor to a constant speed; Taking pulses output from the tachometer for a predetermined time every unit time; Obtaining an absolute value obtained by subtracting the number of pulses taken and the set reference number; And accumulating the absolute value and comparing the reference value with the reference value to determine an imbalance if the accumulated absolute value is greater than the reference value.