KR100617223B1 - Device for sensing a water level and vibration-quantity in a drum-washer and Methode for controlling driving-unit by this device - Google Patents

Abstract

In order to accurately detect the vibration amount of the outer tank when dewatering, a sensor was installed on the outer tank to detect the amount of washing machine water supply, and also to detect the vibration amount of the outer tank when dewatering.

And it is to stop the operation of the drive if necessary to prevent the body from moving violently by vibration.

To this end, an aspect of the present invention is a drum washing machine comprising an outer tub fixed to the main body by a spring and a damper to reduce the amount of vibration, and an inner tub installed inside the outer tub and rotated by a driving unit, wherein the outer tub during washing Not only detects the amount of water flowing into the sensor, but also detects the vibration amount of the outer tub generated as the inner tub is rotated when dewatering, a bracket fixed to the sensor to support the sensor, and the upper bracket to the outer tub It provides a water level and vibration amount sensing device for a drum washing machine comprising a connecting body fastened to the side.

At the same time, in the control method of the present invention, the setting range of the frequency change amount corresponding to the vibration amount is determined according to the revolution per minute (RPM) of the inner tank, and the sensor according to the vibration amount of the outer tank generated when the inner tank is rotated by the drive unit. Driving the driving unit when the frequency change amount is within a setting range of the frequency change amount according to the RPM of the inner tank, and stopping the operation of the driving unit when the frequency change amount is outside the setting range of the frequency change amount. Provide a method.

Description

Device for sensing a water level and vibration-quantity in a drum-washer and Methode for controlling driving-unit by this device}

1 is a block diagram showing the configuration of a general drum washing machine.

2 is a block diagram showing the configuration of a drum washing machine according to the present invention.

Figure 3a is a first embodiment showing the configuration of a sensor according to the present invention.

Figure 3b is a second embodiment showing the configuration of a sensor according to the present invention.

Figure 4a is a third embodiment showing the configuration of a sensor according to the present invention.

Figure 4b is a fourth embodiment showing the configuration of a sensor according to the present invention.

5 is a flowchart for determining whether the frequency change amount of the sensor according to the vibration amount of the outer tank is within a setting range.

Figure 6 is a graph showing the frequency change amount set in the sensor according to the RPM of the inner tank.

Explanation of symbols for main parts of the drawings

1: body 2: outer

3: inner tank 6: drive unit

7: damper 100: sensor

101: bracket 102: connecting body

111: coil 112: magnetic material

113: spring 114: spring tension adjustment unit

115: fixing means 115a: projection

115b: Bottom 115c: Groove

116: diaphragm 120: auxiliary vibration detection means

121: axis 122: magnetic material

The present invention relates to a drum washing machine, and more particularly, to an apparatus for detecting a level and vibration amount of a drum washing machine and a method of controlling a driving unit accordingly.

In general, as shown in FIG. 1, a drum washing machine includes a main body 1, an outer tub 2 supported by a damper 7 and a spring 8 in the main tub, and a laundry placed in the outer tub to accommodate laundry. It is largely divided into a cylindrical inner tub 3, and a driving force is transmitted by the driving unit 6 to wash the laundry in the inner tub.

In addition, the driving unit 6 is connected to the pulley (not shown) installed on the shaft of the inner rear of the inner tank and the motor 4 mounted on one side of the outer tank lower by the mutual belt (5) to generate the power generated by the motor. It is configured to be transmitted to the inner shaft (not shown), the power generated by the rotor and the stator is configured to be directly transmitted to the inner shaft, and the power configured to be transmitted to the inner shaft by a variety of other methods.

On the other hand, the drum washing machine can not only reduce the overall height compared to the pulsator washing machine that rotates in the state in which the inner tank (3) is standing, but also increase the washing capacity, and the demand is rarely generated. There is an increasing trend.

The drum washing machine configured as described above performs the following operation.

Put the laundry to be washed into the inner tank (3), if you select the washing mode provided in the control unit while the detergent is put in the detergent container, the washing stroke ▶ rinsing stroke ▶ dehydration stroke is made continuously and the washing is completed.

That is, if the washing mode is selected, the water supply device is operated to supply water to be washed into the inner tank (3) rotatably installed in the outer tank (2), and the water level sensor ( 11) the water supply is interrupted and the drive unit 6 repeatedly performs the forward and reverse driving.

When the driving unit 6 performs forward and reverse driving as described above, the driving force of the driving unit is decelerated by the deceleration means and applied to the inner tank 3, and the flow of water generated as the inner tank applied with the driving force is forward and reverse rotated. Washing the laundry is made by the impact action and the decomposition of the detergent.

After the washing administration is completed, the rinsing is performed while going through the same process as when washing, and after the rinsing cycle is completed, the dehydrating stroke is performed.

First, during the dehydration stroke, the drain pump 9 operates to completely drain the water filled in the inner tank 3, and then the driving unit 6 is driven.

And in the initial stage of dehydration, the drive unit 6 while rotating the inner tank (3) in the forward / reverse direction to loosen the laundry in order to avoid twisting the laundry in the inner tank and at the same time to catch the balance of the inner tank, the moisture is released from the laundry during this process do.

Water discharged from the laundry is drained out of the washing machine by the operation of the drain pump 9.

Then, the inner tank 3 is balanced and initial dehydration is completed.

Thereafter, when the main dehydration, the drive unit 6 is rotated at a high speed, the inner tank 3 received the rotational force of the drive unit is rotated at a high speed, the laundry in the inner tank is attached to the inner wall of the inner tank by centrifugal force.

And the water of the laundry discharged by the centrifugal force flows into the drain pump 9 side, and the dehydration stroke proceeds while the water is drained out of the washing machine by the continuous operation of the drain pump.

On the other hand, the process of going from the initial dehydration to the main dehydration of the dehydration process in detail as follows.

When the unbalanced state of the inner tank during the initial dehydration is continued, the operation of the driving unit 6 is stopped, and the unbalance checking process accordingly is performed by the change in the angular velocity of the driving unit.

That is, the angular velocity change amount of the driving unit is as follows.

When laundry is gathered on one side of the inner tank 3 during initial dehydration, that is, when the laundry is eccentric, the rotation direction of the place where the laundry is located becomes the same as the gravity direction, the angular velocity of the driving unit 6 for driving the inner tank is Increased by gravity acceleration.

On the other hand, when the rotation direction of the place where the laundry is located is opposite to the gravity direction, the angular speed of the drive unit 6 is reduced by the gravity acceleration.

Therefore, when the initial dehydration, the change in the angular velocity of the drive unit 6 means the unbalanced state in which the inner tank is eccentric, thereby stopping the operation of the drive unit 6.

However, the prior art that does not have a separate sensor for detecting the unbalance of the inner tank 3 has the following problems.

In the initial dehydration, there was a limit to the unbalance check because the unbalance of the inner tank was checked by the change in the angular velocity of the drive unit 6 while the inner tank 3 was rotated in the forward / reverse direction.

Among them, the limit of the typical unbalance check occurs when the inner tank 3 is doubled by the laundry as follows.

When some laundry is seated on the inner bottom side inner wall of the inner tank (3), and some laundry is seated on the inner wall of the rear upper side of the inner tank, when dehydration, the inner tank is a double-sided conical mode vibration occurs so that the laundry The direction of rotation is simultaneously exceeded in the direction of gravity and in the direction opposite to gravity, respectively.

That is, since the acceleration of gravity affecting the angular velocity of the driving unit 6 is canceled by the laundry located at the two points, the angular velocity of the driving unit 6 is kept constant.

Therefore, even though the inner tank 3 is in an unbalanced double eccentric state, it is judged that the balance is caught and proceeds to the main dehydration, and when the dewatering in the high-speed rotation, the inner tank 3 in the unbalanced state generates a large vibration As a result, there was a problem such as a working phenomenon in which the main body 1 moves violently.

The present invention has been made to solve the problems of the prior art, in order to accurately detect the amount of vibration of the outer tank when dewatering, by installing the sensor on the outer tank to detect the amount of water in washing, the amount of vibration of the outer tank when dewatering Its purpose is to detect as well.

In addition, the purpose of the operation is to stop the movement of the drive unit as necessary to prevent the body from moving violently by vibration.

In order to achieve the above object, an aspect of the present invention is a drum washing machine comprising an outer tub fixed to the main body by a spring and a damper for reducing the amount of vibration, and an inner tub installed inside the outer tub and rotated by a drive unit,
In addition to detecting the amount of water flowing into the outer tub when washing, a sensor for sensing the vibration amount of the outer tub generated when the inner tub is rotated when dewatering, a bracket fixed to the sensor to support the sensor, and It provides a level and vibration amount sensing device for a drum washing machine, characterized in that it comprises a connector for fastening the bracket to the upper side of the outer tank.

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At the same time, in the control method of the present invention, the setting range of the frequency change amount corresponding to the vibration amount is determined according to the revolution per minute (RPM) of the inner tank, and the sensor according to the vibration amount of the outer tank generated when the inner tank is rotated by the drive unit. Driving the driving unit when the frequency change amount is within a setting range of the frequency change amount according to the RPM of the inner tank, and stopping the operation of the driving unit when the frequency change amount is outside the setting range of the frequency change amount. Provide a method.

Referring to the drawings to describe the above content in more detail as follows.

Figure 2 is a block diagram showing the configuration of a drum washing machine according to the present invention, Figure 3a is a first embodiment showing the configuration of the sensor according to the invention, Figure 3b is a second embodiment showing the configuration of the sensor according to the present invention 4A is a third embodiment showing a configuration of a sensor according to the present invention, and FIG. 4B is a fourth embodiment showing a configuration of a sensor according to the present invention.

5 is a flowchart for determining whether or not the frequency change amount of the sensor according to the vibration amount of the outer tank is within the setting range, and FIG. 6 is a graph showing the frequency change amount set in the sensor according to the RPM of the inner tank.

As shown in Figure 2, the level and vibration amount sensing device of the drum washing machine is configured as follows.

The sensor 100 not only detects the amount of water flowing into the outer tub 2 at the time of washing as a frequency value, but also detects the vibration amount of the outer tub generated as the inner tub 3 is rotated during dehydration as a frequency change amount. It provides a water level and vibration amount sensing device of the drum washing machine consisting of a coupling means for coupling the sensor 100 on the outer tank (2).

Referring back to Figure 2, it will be described in more detail with respect to the water level and vibration detection device as follows.

The sensor 100 is connected to one end of the hose 10 extending toward the upper end of the main body 1 to communicate with one end of the outer tank 2 to be sealed to control the amount of water flowing into the outer tank by the sensor. In addition, the sensor is installed on the outer tub to detect the vibration amount of the outer tub generated as the inner tub (3) is rotated as the frequency change of the sensor.

On the other hand, as shown in Figure 3a, the sensor of the configuration of the present invention has the following components.

Coil 111 connected to each other to receive a power supply voltage, a magnetic body 112 for moving the coil unit to inductance to the coil, a spring 113 for limiting the amount of movement of the magnetic body, and provided in the spring It is composed of a spring tension control unit 114 for adjusting the amount of movement of the magnetic material.

At the same time, the magnetic body 112 is fixed between the protrusions 115a and the lower end 115b protruding in the radial direction along the upper edge, and the fixing means 115 having the groove 115c formed at the upper center thereof, and the fixing means. The diaphragm 116 for transmitting the pneumatic pressure is included.

The sensor configured as described above performs the following operations and roles.

First, during washing, pneumatic pressure is generated by the water flowing into the outer tub 2, and the fixing means 115 of the rubber material seated on the diaphragm 116 is moved upward by the pneumatic pressure.

At the same time, the magnetic body 112 fixed to the fixing means 115 is also moved upward. At this time, the amount of movement of the magnetic body by the spring 113 and the spring tension adjusting unit 114 because the strength of the pneumatic pressure is large. The magnetic body is adjusted, the moving amount is adjusted to pass through the coil unit 111.

At the same time, the coil unit 111 acts to interfere with the intensity of the magnetic flux of the magnetic body 112 and induces an inductance which is a value indicating the strength of the action.

As a result, while the frequency value is measured by the value of the inductance, the frequency value is adjusted to compare with the set frequency value already input to the microcomputer (not shown) to adjust the water level of the tub 2.

Second, when dewatering, the magnetic body 112 fixed to the fixing means 115 by the vibration of the outer tub (2) is also vibrated, wherein the magnetic material is continuously vibrated in the coil portion 111 do.

At the same time, the coil unit 111 acts to interfere with the intensity of the magnetic flux of the magnetic body 112 and induces an inductance which is a value indicating the strength of the action.

As a result, the amount of change in frequency is measured by the inductance, and the amount of change in frequency is compared with the amount of change in the set frequency already input to the microcomputer to sense the amount of vibration of the outer tub 2.

On the other hand, as shown in Figure 4a, when dehydration, in order to accurately detect the vibration of the outer tub 2, the magnetic body 112 of the configuration of the sensor 100 is the upper / lower end of the fixing means 115 It is preferable to be installed to be movable between.

The reason for this is that the inductance is calculated accurately by widening the vibration range of the magnetic body 112, and thus the frequency variation is accurately measured.

On the other hand, as shown in Figure 4a, the fixing means is designed as follows so that the magnetic body 112 is installed to be movable between the upper and lower ends of the fixing means 115.

In order to widen the vibration range of the magnetic body 112, the upper and lower intervals of the fixing means 115 is designed to be larger than the height of the magnetic body 112.

That is, when the upper and lower intervals of the fixing means 115 is called "a" and the height of the magnetic body 112 is "b", a> b must be established.

On the other hand, as shown in Figure 3a and 4b, on the fixing means 115, it is preferable that the auxiliary vibration detecting means 120 for doubling the vibration detection of the outer tub (2).

The auxiliary vibration detecting means has the following components.

A shaft 121 mounted in parallel with the coil unit 111 in the groove 115c of the fixing means and a separate magnetic body 122 mounted to be movable along the shaft are included.

Therefore, since the auxiliary vibration detecting means 120 configured as described above is added, the amount of change in inductance is accurate, and thus the sensing force of the sensor 100 for detecting the vibration amount of the outer tub 2 is doubled.

On the other hand, as shown in Figure 2, the coupling means is as follows.

It comprises a bracket 101 fixed to the sensor 100 to support the sensor, and a connecting body 102 for fastening the bracket to the upper side of the outer tub (2).

On the other hand, since the sensor 100 is installed on the outer tub 2 which is a vibrating body, the connection body 102 includes a screw in order to prevent the sensor from being separated and malfunctioned by the vibration of the outer tub. More preferable.

As shown in Figure 5, the driving unit control method of the drum washing machine proceeds as follows.

If the frequency change amount of the sensor 100 according to the vibration amount of the outer tub 2 generated when the inner tub 3 is rotated by the driving unit 6 when dewatering is within the setting range, the driving unit is activated. The operation of stopping the driving unit is included.

On the other hand, as shown in Figure 6, it is more preferable that the step is proceeded as the frequency change amount set in the sensor is set differently depending on revolution per minute (RPM) of the inner tank.

5 and 6, the method of controlling the driver 6 will be described in more detail as follows.

The frequency change of the sensor 100 according to the vibration amount of the outer tub 2 while the inner tub 3 is driven at the first RPM (0 to 200) by the driver 6 is the first set range (0 to A Hz). Determine if you are inside or not.

If the vibration amount of the outer tub 2 at the first RPM of the inner tub 3 is within the first setting range of the sensor 100, the driving unit 6 is activated, and if it is outside the first setting range, the driving unit is stopped.

At the same time, the frequency change of the sensor 100 according to the vibration amount of the outer tank while the inner tank 3 is driven by the driving unit at the second RPMs 200 to 600 is controlled by the second setting method (0 to B Hz). Determine if you are inside or not.

If the vibration amount of the outer tub 2 at the second RPM of the inner tub 3 is within the second setting range of the sensor 100, the driving unit 6 is operated. If it is outside the second setting range, the driving unit is stopped.

At the same time, the frequency change of the sensor 100 according to the vibration amount of the outer tub 2 while the inner tub 3 is driven by the driver 6 at the third RPMs 600 to 800 is controlled by the third set range 0 to. C Hz) or not.

When the vibration amount of the outer tub 2 at the third RPM of the inner tub 3 is within the third setting range of the sensor 100, the driving unit 6 is activated, and when it is outside the third setting range, the driving unit is stopped.

At the same time, the frequency change of the sensor 100 according to the vibration amount of the outer tank 2 while the inner tank 3 is driven by the driving unit at the fourth RPM (800 to 1000) by the driving unit 6 is the fourth set range (0 to 0). D Hz) or not.

If the vibration amount of the outer tub 2 at the fourth RPM of the inner tub 3 is within the fourth setting method of the sensor 100, the driving unit 6 is activated, and if it is outside the fourth setting range, the driving unit is stopped.

After that, when the set dewatering time ends, the operation of the driving unit 6 is stopped and the dehydration is completed.

As described above, the present invention is not only to detect the water level in the outer tank when washing using the sensor, but also to detect the vibration amount of the outer tank when dewatering.

Therefore, the cost savings can be achieved because one sensor can perform two functions.

In addition, since the sensor detects the vibration amount of the outer tub, which has not been detected in the past, the vibration amount of the outer tub can be accurately detected, and in particular, a double core vibrating in the conical mode can be detected.

Therefore, there is no fear that the main body moves badly or the product is damaged by the vibration of the outer tank, thereby increasing the reliability of the product to the consumer.

Claims (9)

In the drum washing machine comprising an outer tub fixed to the main body by a spring and a damper to reduce the amount of vibration, and an inner tub installed inside the outer tub and rotated by a drive unit, Sensor not only detects the amount of water flowing into the outer tub when washing, but also detects the amount of vibration of the outer tub generated when the inner tub is rotated when dewatering; A bracket fixed to the sensor and supporting the sensor; The level and vibration amount sensing device of the drum washing machine, characterized in that it comprises a connector for fastening the bracket to the upper side of the outer tank. The method of claim 1, The sensor; Coils connected to each other to receive a power voltage, A magnetic material moving the coil part to induce inductance to the coil, A spring defining a movement amount of the magnetic material, A spring tension adjusting unit provided in the spring to adjust a moving amount of the magnetic body; Fixing means for fixing the magnetic material between the protrusion and the lower end projecting in the radial direction along the upper edge and the groove is formed in the upper center, The level and vibration amount sensing device of the drum washing machine, characterized in that the diaphragm for transmitting the pneumatic pressure to the fixing means. The method of claim 2, In order to accurately measure the vibration amount of the outer tub, the magnetic body is a water level and vibration amount sensing device of the drum washing machine, characterized in that installed so as to be movable between the upper and lower ends of the fixed body. The method of claim 3, wherein The upper and lower intervals of the fixing body is designed to be greater than the height of the magnetic material level and vibration sensing device of the drum washing machine. The method of claim 2 or 3, The level and vibration amount sensing device of the drum washing machine, characterized in that the auxiliary vibration detection means for doubling the vibration detection of the outer tub is further provided on the fixing means. The method of claim 5, wherein Auxiliary vibration sensing means; An axis mounted in parallel with the coil in the groove of the fixing means; Water level and vibration amount sensing device of the drum washing machine, characterized in that it comprises a separate magnetic material mounted to be movable along the axis. delete The setting range of the frequency change amount corresponding to the vibration amount is determined according to RPM (revolution per minute) of the inner tank, If the frequency change of the sensor according to the vibration amount of the outer tank generated when the inner tank is rotated by the driving unit is within the setting range of the frequency change amount according to the RPM of the inner tank, the driving unit is activated, and if it is outside the setting range of the frequency change amount, the driving unit Driving unit control method of the drum washing machine comprising the step of stopping the operation. delete

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