KR20060000005A - Dehydration Control Device and Method of Drum Washing Machine - Google Patents

Abstract

The present invention is to prevent water from entering when dehydration, the key input unit for inputting a user request command in a drum washing machine equipped with a motor and a heater, and control to perform the stroke according to the selected washing course through the key input unit At the same time, it includes a control unit for controlling to prevent water entering when entering the dehydration stroke, and a load driver for controlling the driving of the motor and the heater according to the control signal of the control unit, and is contained in the initial dehydration stroke By discharging a certain amount of water to prevent dehydration from entering, it is possible to prevent water from entering and to minimize dehydration noise and vibration by preventing unbalanced water and changing the unbalance amount as the dehydration stroke begins. It works.

Drum washing machine / water detection

Description

Dehydration control device and method of drum washing machine {Method and apparatus for controlling dehydrate of (a) drum type washing machine}

1 is a cross-sectional view showing a general drum washing machine

Figure 2 is a block diagram showing a dehydration control device of the drum washing machine according to the present invention

3 is a flow chart illustrating a dehydration control method of the drum washing machine according to the present invention.

Figure 4 is a graph showing the dehydration process of the drum washing machine according to the present invention

Explanation of symbols for main parts of the drawings

101: key input unit 102: control unit

103: load driving unit 104; motor

105: storage unit 106: display unit

The present invention relates to a washing machine, and more particularly, to a dewatering control device and method for a drum washing machine to prevent water from entering during dehydration in the drum washing machine.

In general, a washing machine performs washing strokes, rinsing strokes, and dehydration strokes by rotating a washing tank and a pulsator through a driving force of a motor, and putting washing water and laundry together inside a rotating tank and stirring them to wash laundry and washing. It is a device that washes using friction of water and a rotating tub.

These washing machines are classified into pulsator type, stirring type, drum type, etc. according to the washing method.

In general, a drum washing machine is a device that allows washing to be performed by using a rotating drum and a friction force of the laundry by receiving the driving force of the driving unit while detergent, washing water, and laundry are put into the washing drum. It's not tangled, and it's designed to give you a pounding and scrubbing wash effect.

Hereinafter, a structure of a general drum washing machine will be described with reference to the accompanying drawings.

1 is a cross-sectional view schematically showing the structure of a general drum washing machine, and FIG. 2 is a graph showing a dehydrating and administrative process of the drum washing machine according to the prior art.

1 is a cross-sectional view showing the configuration of a general drum washing machine, a drum washing machine is rotatable about a tub (2) supported by a damper (7) and a spring (6) in the main body (1), and a horizontal axis within the tub. It is composed of a cylindrical drum (3) provided, and a drive motor (5) axially coupled to the drum.

The drive motor 5 is composed of a rotor 5b and a stator 5a at the rear of the tub 2, and a drum for transferring the driving force of the rotor 5b directly to the drum 3 without a pulley or a belt. The drum shaft 4 which rotates together with the rotor is directly connected to the rotor.                         

The front surface of the main body 1 is provided with a door 8 at a predetermined position to correspond to the opening of the drum 3, between the door and the drum is provided with a gasket 9 for maintaining a seal in the drum, the door The upper part of the (8) is provided with a controller panel 10 for receiving a user's operation command and controls the operation of the entire washing machine.

The drum washing machine configured as described above transmits the rotational force of the rotor 5b to the drum 3 through the washing shaft 4, and the laundry is lifted by the lifter 3a while the drum rotates, and then downward by gravity. As you fall, you will perform a laundry administration.

That is, the laundry pulled upward by the rotation of the drum (3) falls down by its own weight when it reaches a predetermined height and collides with the wash water, and the laundry is rubbed with the wash water while repeating this process several times. Is washed by.

After washing is performed by the above operation, a dehydration operation is performed. The rotary drum 3 is rotated at a high speed while driving the drain pump (not shown) to perform drainage through a drain line (not shown). Dehydration by centrifugal force.

The dehydration mode of the drum washing machine according to the prior art is performed by sequentially performing steps of popping, first to third balancing, first and second intermittent dehydration, acceleration, and normal dehydration. The drum 3 is rotated at 50 rpm for a predetermined time to eliminate tangling of the laundry. In the first to third balancing steps, the drum is rotated at 108 rpm for a predetermined time to spread the laundry evenly inside the rotary drum 3 to rotate the drum ( 3) Make this balance.

In addition, the first intermittent dehydration is performed according to the first eccentric detection result, the second intermittent dehydration is performed according to the second eccentric detection result, and the normal dehydration section is entered according to the third eccentric detection result.

That is, the intermittent dehydration is to reduce the noise generated when a large amount of water is drawn out at the beginning of the dehydration operation, and to reduce the load applied to the washing motor 5. The first intermittent dehydration is a rotational speed of the motor 5. Accelerates to 170rpm and decelerates to 108rpm, and if it decelerates to 108rpm, it accelerates to 300rpm after the second eccentricity sensing and then decelerates to 108rpm again.

In addition, in the acceleration step, the speed of the rotating drum 3 is increased to 600 rpm in order to perform a normal dehydration operation, and in the normal dehydration step, the speed of the rotating drum 3 is continuously increased until the dehydration time ends. Perform

In the above operation, the speed of the rotating drum 3 is determined by the driving of the washing motor 5, which must be driven at low speed in the washing mode and at high speed in the dehydration mode.

However, such a dehydration algorithm of a general drum washing machine detects the initial unbalance amount of dehydration, and enters the dehydration stroke immediately if it is within a predetermined allowable range, so that the water contained in the fabric is discharged at a time in the initial stage of dehydration. The phenomenon of kicking around occurred.

In addition, when different types of cloth are put together (towels, shirts, etc.), the water content is different, so that the water is released during dehydration, and the unbalance value is changed during the dehydration process due to the difference in water content. There was this.

The present invention has been made to solve the above problems, and the object of the present invention is to be able to prevent the phenomenon of water gap in the early stage of dehydration.

Drum washing machine according to the present invention for achieving the above object, in the drum washing machine having a motor and a heater, a key input unit for inputting a user request command, and control to perform the stroke according to the selected washing course through the key input unit At the same time, it includes a control unit for controlling the water soaking phenomenon when entering the dehydration stroke, and a load driving unit for controlling the driving of the motor and the heater according to the control signal of the control unit.

Preferably, the control unit outputs a control signal to the load driving unit so that the motor can be operated at a low speed at a predetermined speed when the dehydration stroke is initially entered.

More preferably, the preset speed is about 200 rpm.

In the dehydration control method of the drum washing machine according to the present invention for achieving the above object, in the dehydration control method of the drum washing machine having a motor and a heater, the user selects a desired washing course after inputting a power-on command, Performing a washing and rinsing stroke according to the selected washing course; removing a predetermined amount of water absorbed in the dehydrating stroke washing cloth when the rinsing stroke is completed; and depending on the degree of unbalance after the moisture is removed. It is characterized by including the step of controlling whether or not to enter the normal dehydration.

Preferably, the step of removing a predetermined amount of moisture absorbed by the laundry cloth is characterized in that the motor is driven for a predetermined time at a predetermined set speed when the dehydration stroke is initially entered.

More preferably, the step of controlling whether or not the normal dehydration entering is to detect the unbalance after removing a certain amount of moisture absorbed in the laundry cloth, and if the detected unbalance amount is less than the predetermined reference value, the step of entering the dehydration stroke is characterized in that have.

Hereinafter, a drum washing machine and a dehydration control method according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram showing the configuration of a drum washing machine according to the present invention, Figure 3 is a flow chart showing a dewatering control method of the drum washing machine according to the present invention, Figure 4 is a graph showing the rotation speed of the motor over time.

As shown in FIG. 2, the drum washing machine according to the present invention controls a key input unit 101 for inputting a user request command and a stroke according to a washing course selected through the key input unit 101. The controller 102 controls to prevent water entering when entering the dehydration stroke, and the load driver 103 controlling the driving of the motor 104 and the heater (not shown) according to a control signal of the controller 102. It is configured to include.

In addition, the storage unit 105 for storing reference values for the various sensed values input to the control unit 102, and the display unit 106 for displaying the operation state in accordance with the control signal of the control unit 102 is further It is configured to include.

Referring to the operation of the drum washing machine according to the present invention configured as described above are as follows.

When the user selects the desired washing course through the key input unit 101 and inputs an operation command, the washing and rinsing stroke according to the corresponding course can be controlled, and when the rinsing stroke is completed, water can be prevented in advance when entering the dehydrating stroke. The control unit 102 detects the water so that.

That is, during the initial stage of dehydration, the motor 104 may be rotated at a low speed at a predetermined level, and a certain amount of water contained in the cloth may be discharged, and then an unbalance amount may be sensed to prevent water from entering the dehydration.

By discharging a certain amount of water contained in the fabric at the beginning of dehydration, it is possible to prevent the unbalance amount caused by the difference in water content depending on the quality of the foam during the dehydration stroke.

As shown in FIG. 4, when the dehydration stroke is entered, the dehydration stroke is rotated at a predetermined speed of about 200 rpm, which is the initial rotation speed, and stops, and the unbalance detection and the dehydration stroke are performed according to the preset dehydration stroke.

The dewatering control method of the drum washing machine according to the present invention configured as described above will be described with reference to FIG. 3. First, when a user inputs a power-on command, the user selects a desired course (S101 to S102).

When the user inputs an operation command, the washing and rinsing strokes are sequentially performed according to the selected course (S103 to S105).

Subsequently, when the dehydration stroke is started, the motor is rotated at a low speed (S106 to S107).

Then, it is determined whether the preset time has elapsed (S108).

Subsequently, when the preset time has elapsed, it is determined whether the amount of unbalance is less than or equal to the preset reference value while entering the dehydration stroke (S109).

As a result of the determination (S108), if the amount of unbalance is less than or equal to the preset reference value, the dehydration stroke is entered (S110).

Then, when all dehydration administration is completed (S111).

On the other hand, the determination result (S109), if the unbalance amount is more than the predetermined reference value continues to detect the eccentricity (S112).

As described above, the drum washing machine and the dehydration control method according to the present invention show that the unbalance value during the dehydration progression is changed by the difference in water content during the dehydration entry when the water content is different when the foams with different materials are added together. By entering the dehydration stroke after the rotation in advance, the water wheel is prevented from entering the dehydration.

As described above, the drum washing machine and the dehydration control method thereof according to the present invention have the following effects.

First, by discharging a certain amount of water contained in the initial stage of the dehydration administration, the water gap during dehydration can be prevented.

Second, as the dehydration process begins after preventing the water intake, the unbalance amount can be prevented.

Third, dehydration noise and vibration can be minimized by preventing the change of the unbalance amount.

Claims (6)

In a drum washing machine with a motor and a heater, A key input unit for inputting a user request command; A control unit which controls to perform a stroke according to the selected washing course through the key input unit and prevents water from entering when entering a dehydration stroke; And, And a load driving unit for controlling driving of the motor and the heater according to the control signal of the controller. The method of claim 1, The control unit is a dewatering control device of the drum washing machine, characterized in that for outputting a control signal to the load driving unit to drive the motor at a predetermined speed at the initial entry into the dehydration stroke. The method of claim 2, The preset speed of the drum washing machine dewatering control device, characterized in that about 200rpm. In the dewatering control method of the drum washing machine provided with a motor and a heater, Selecting a desired washing course after the user inputs a power on command; Performing washing and rinsing stroke according to the selected washing course; Removing a predetermined amount of water absorbed in the initial washing cloth after the rinsing cycle is completed; And, Dehydration control method of the drum washing machine comprising the step of controlling whether the normal dehydration entry according to the degree of unbalance after the moisture is removed. The method of claim 4, wherein Removing a predetermined amount of water absorbed in the laundry cloth Dehydration control method of the drum washing machine characterized in that for driving the motor at a predetermined set speed for a predetermined time when the dehydration stroke initial entry. The method of claim 4, wherein The step of controlling whether the normal dehydration entering Dehydration control method of the drum washing machine characterized in that the step of detecting the unbalance after removing a predetermined amount of water absorbed in the laundry cloth, and entering the dehydration stroke if the detected unbalance amount is less than a predetermined reference value.

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