KR20050102931A - Clothes amount sensing method of washing machine - Google Patents

Abstract

The present invention relates to a method for detecting a quantity, comprising a preliminary dehydration step of removing the wash water contained in the fabric, and after the end of the preliminary dehydration step, increasing the duty value supplied to the motor until the RMP of the motor reaches a set RPM. The duty value increasing step and the amount value calculation step of extracting the duty value and calculating the amount of dose when the motor RPM reaches the set ALPM are advantageous in that the accuracy and reliability of the quantity detection is high.

Description

Clothes amount sensing method of washing machine

The present invention relates to a quantity detection method of a washing machine, and is a quantity detection method of a washing machine having improved accuracy and reliability of the quantity detection.

In general, a washing machine is a device that removes contaminants from laundry by using a detergent and water. Recently, a washing machine detects the amount of laundry and determines the washing level, washing time, amount of detergent, rinsing and water flow, and washing. The trend is to perform rinsing, dehydration, drying and the like.

1 is an internal configuration diagram of a typical washing machine example.

As shown in FIG. 1, a casing 2, a reservoir 10 mounted inside the casing 2 and containing wash water w, and rotatably positioned in the reservoir 10 are disposed in the casing 2. The washing tank 20 in which the object to be washed (m) is accommodated, and the motor 30 for supporting the washing tank 20 and rotationally driven.

The casing 2 has a laundry access hole 2a formed on one surface thereof, and a door 4 for opening and closing the laundry access hole 2a is mounted.

The door 4 is composed of a door frame 5 rotatably connected to the casing 2 and a door glass 6 mounted to the door frame 5.

The washing tub 20 has a laundry access hole 21 through which the laundry (m) can enter and exit, and a hand 22 is formed to allow the washing water (w) to flow in and out.

The motor 30 has a rotating shaft 32 is supported by the bearing 34 to the reservoir 10 while penetrating the reservoir 10 and the front end thereof is connected to the washing tank 20, the AlPM of the motor 30 or A hall sensor for measuring the rotation angle is provided.

In addition, the washing machine further includes a water supply device for supplying the washing water supplied from the outside into the water storage tank 10, wherein the water supply device is connected to the external hose 41 and is supplied through the external hose 41. It includes a water supply valve 42 for regulating the water and a detergent container 43 formed with a detergent storage space, a water supply passage and an outlet to mix and discharge the water supplied into the washing machine with a previously stored detergent.

In addition, the washing machine further includes a drainage device for draining the washing water (w) in the reservoir 10 to the outside, the drainage device is a drain hose (W) for guiding the washing water (w) of the reservoir ( 45, bellows tube) and a drain pump 46 (or a drain valve) for pumping (or intermitting) the washing water to be drained.

On the other hand, the washing machine further includes a control unit 49 for controlling the motor 30, the water supply valve 42 and the drain pump 46 in accordance with the user's operation or sensed amount.

Looking at the operation of the prior art configured as described above are as follows.

First, when the laundry (m) is put into the washing tank 20, the door 4 is closed and the washing machine is operated, and the controller 49 detects and detects the quantity of the laundry to be injected (w). Set the washing level, washing time, amount of detergent, rinsing and washing water according to the amount of water used.

The controller 49 controls the water supply valve 42 for a set time according to the detected amount of water to supply washing water to a predetermined level inside the washing machine, and the supplied washing water is supplied into the water storage tank 10 to store the water storage tank 10. ) Will be contained within. Then, the control unit 49 drives the motor 30 at the set ALPM for a set time to rotate the washing tank 20, the laundry (m) accommodated in the washing tank 20 is wash water (w) Due to the action of the stain will fall. After the washing stroke is completed, the contaminated washing water in the reservoir 10 is drained to the outside of the washing machine through the drainage device.

On the other hand, the washing machine performs a rinsing stroke several times for rinsing the remaining foam in the laundry (m), and controls the water supply valve 42 and the motor 30 according to the detected amount of water, such as a washing stroke. Contaminated water, including foam, is then drained out of the washing machine through the drainage device 12.

After the above several rinsing strokes, the washing machine performs a dehydration stroke for controlling the motor 30 at high speed so as to centrifuge the water of the laundry object m.

2 is a flowchart illustrating a method of detecting a quantity of washing machine according to the prior art, and FIG. 3 is a graph illustrating driving of a motor for detecting the amount of washing machine according to the related art.

2 and 3, the method for detecting a quantity of washing machine according to the related art starts the motor 30 and accelerates the motor 30 until it reaches a set rpm (S1, S2). When RPM of RH reaches the reference RPM, the constant speed is maintained for a predetermined time Ts, and the pulse width modulation (PWM) duty value from the start to the constant speed is measured. S4)

After the constant speed is maintained, the motor 30 is turned off to rotate the force, and the rotation angle according to the rotation of the force of the motor 30 is measured. (S5, S6)

Then, the measured amount of the pulse width modulation (PWM) duty (hereinafter, referred to as a duty value) is multiplied by the value obtained by multiplying the proportional constant and the value obtained by multiplying the proportional constant by the rotation angle to finally calculate the quantity determination value. (S7)

However, according to the prior art, the capacity detection method of the washing machine rotates the force due to the friction of the bearing 34, which is the friction torque generated when the washing tank 10 rotates, and the friction between the door glass 6 and the object to be washed (m). The angle of rotation is easily changed, and therefore, there is a problem that the accuracy and reliability of the quantity detection is low.

In addition, the quantity detection method of the washing machine according to the prior art takes a load on the rotation of the motor for sensing the amount due to the wash water contained in the fabric during the dehydration stroke, thereby reducing the efficiency and accuracy of the quantity detection.

The present invention has been made in order to solve the above problems of the prior art, and after removing the wash water contained in the fabric, and accelerates the ALMP of the motor to the set ALPM, the amount of the dose through the table provided to the duty and micom of the set ALPM It is an object of the present invention to provide a method for detecting a quantity of washing machine with improved accuracy and reliability.

The quantity detection method of the washing machine according to the present invention for solving the above problems is a preliminary dehydration step of removing the wash water contained in the fabric, and after the end of the preliminary dehydration step, the motor until the AlpM reaches the set ALPM And a duty value increasing step of increasing a supplied duty value, and calculating a quantity by extracting a duty value at that time when the motor RPM reaches the set ALPM.

The duty value increasing step may increase the duty value step by step.

In addition, the amount calculation step is characterized in that for calculating the amount of dose by applying the duty value when the set RMP reaches the table stored in the microcomputer.

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

4 is a flow chart illustrating an embodiment of a washing amount detection method of a washing machine according to the present invention, FIG. 5 is a graph illustrating a washing amount detection method of a washing machine according to the present invention, and FIG. The drive of the motor according to the graph is shown.

As shown in FIGS. 4 to 6, the method for detecting a quantity of washing machine according to the present embodiment includes a preliminary dehydration step (S10) of removing the washing water contained in the cloth, and an ALPM of the motor. The duty value increasing step (S20) of increasing the duty value supplied to the motor until reaching "), and calculating the quantity from the duty value at that time when the rpm of the motor reaches the set ALPM. A quantity calculation step S30 is comprised.

The preliminary dehydration step (S10) is a motor starting step (S12) for rotating the drum to remove the wash water contained in the fabric during the dehydration stroke, and after removing the wash water contained in the fabric for a predetermined time, stopping the motor Motor stop step (S14) is made.

In the preliminary dehydration step (S10) during the duty value increasing step (S20) for detecting the quantity of water, the washing water is removed to smoothly rotate the motor to enable more accurate and efficient quantity detection.

In addition, in the preliminary dehydration step (S10) it is preferable to rotate the drum for 1 to 2 minutes at a predetermined ALPM (rpm ', for example, set to 60rpm).

In the duty value increasing step S20, the duty value supplied to the motor during washing is subdivided into a predetermined size (eg, divided into 255 sections), and the duty value supplied to the motor is stepwise. A duty value setting step of setting to (for example, 10/255 as 1 unit); The step of increasing the duty value set in the duty value setting step is made of an RPM input step of inputting to the motor.

In the ALPM increasing step S24, it is preferable to increase the duty value step by step.

On the other hand, the amount calculation step (S30) is to continue the increase of the duty (duty), while comparing the motor RPM (rpm) and the setting of the RPM (rpm "), and as a result of comparison the motor RPM (rpm) is set to If it matches (rpm "), the duty value at that time is extracted.

Then, the extracted duty value is substituted into Table 1, previously stored in the microcomputer, to finally calculate the amount of capacity.

Here, Table 1 is a measurement determined by the experiment.

Duty 10/255 20/255 30/255 40/255 50/255 60/255 ... Quantity   1 kg   2 kg   3 kg   4 kg   5 kg   6 kg ...

For example, when the duty value input to the motor is 40/255, if the motor's RF reaches the set ALMP, the quantity is calculated as 4 kg.

In the drum amount detection method according to the present invention is configured as described above, after removing the wash water contained in the fabric, the duty value supplied to the motor until the RMP of the motor reaches the set RPM input to the motor, the motor When the RPM of the RMP reaches the set RPM, the duty value is extracted to calculate the quantity, and thus there is an advantage that efficiency can be increased and accuracy and reliability can be improved.

In addition, the duty value increasing step has an advantage that accuracy can be further improved by increasing the duty value step by step.

In addition, the amount calculation step has the advantage that can be easily detected without a separate algorithm by calculating the dose by applying the duty value when the set RPM to the table stored in the microcomputer.

1 is an internal configuration diagram of a typical washing machine example;

2 is a flow chart illustrating a method for detecting a quantity of washing machine according to the prior art;

3 is a graph showing the driving of the motor for detecting the amount of washing machine according to the prior art,

4 is a flow chart illustrating an embodiment of a method for detecting a quantity of washing machine according to the present invention;

5 is a graph showing a quantity detection method of a washing machine according to the present invention;

6 is a graph showing the driving of the motor according to the quantity detection method of the washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

Claims (3)

A preliminary dehydration step of removing the wash water contained in the fabric; After the preliminary dehydration step, the duty value increasing step of increasing the duty value supplied to the motor until the RMP of the motor reaches the set RPM; A quantity detection method of a washing machine, characterized in that the quantity calculation step of calculating the quantity by extracting the duty value at that time when the PM of the motor reaches the set ALPM. The method of claim 1, Wherein the step of increasing the duty value, the capacity detection method of the washing machine, characterized in that for increasing the duty value step by step. The method according to claim 1 or 2, The quantity calculating step of the washing machine detecting the quantity of the washing machine, characterized in that for calculating the amount of the application by applying the duty value when the set RPM to the table stored in the microcomputer.