KR20050080191A - Device for dehydration of washing machine - Google Patents

Abstract

Dehydration operation apparatus of the washing machine disclosed in the present invention, the operation device for dewatering the laundry by rotating the washing tank in the case: an unbalance that is formed on the bottom of the case to sense the amount of unbalance caused by the rotation of the induction motor as a change in resistance value Sensing device; Stabilization means for stabilizing a change in voltage according to a change in resistance obtained in the unbalance sensing device; And subdividing the change value of the voltage obtained by the stabilizing means into at least one detection reference value of the unbalance amount, and determining the degree of unbalance according to the refined detection reference value to change the dehydration time and the number of intermittent dehydration to control the performance of dehydration. A microprocessor; The microprocessor, the first intermittent dehydration to dehydrate by performing inflated through water supply and drainage according to the granular unbalance degree, the second intermittent dehydration, dehydration without intermittent dehydration by repeatedly dehydrating the induction motor The dehydration operation is controlled by any one of the dehydration operations, and accordingly, the dehydration operation is performed differently with the degree of unbalance of the laundry according to the rotation of the induction motor, so that the error probability of the unbalance and the time required for dehydration are increased. There is an advantage of being shortened.

Description

DEWICE FOR DEHYDRATION OF WASHING MACHINE

The present invention relates to a dehydration driving apparatus, particularly in a washing machine that performs washing operation control by unbalance of cloth and unbalance of a washing tank, and more particularly, a dehydration time having an unbalance amount of a washing tank due to the bias of laundry. And it relates to a dehydration operation device of the washing machine to change the number of intermittent dehydration to optimize the dewatering operation and to balance the accuracy of unbalance detection.

Recently, the automation of the washing machine has been advanced, and the amount of clothing and the like put into the washing tank at the initial stage of the washing process has been detected and controlled to the optimum water flow, detergent, and processing time according to the amount of washing.

Such a washing machine senses the quantity of clothing and the like put into the washing tank, and when the quantity is determined, sets the water flow, the detergent and the total washing time according to the quantity, and swirls the water through the reverse rotation of the pulsator during the whole washing time. Washing stroke to perform washing by friction, draining turbid water after washing stroke, supplying fresh water to the washing tank through the water supply valve, rinsing stroke to proceed rinsing for the set number of times, draining and inducing water in washing tank after rinsing stroke The washing operation is performed in a dehydrating stroke procedure in which the motor is rotated at a high speed to remove the laundry by centrifugal separation.

In the operation control method of such a washing machine, in particular, in the dehydration operation method, the rotation of the dehydration tank, that is, the washing tank is usually set to reach a high speed operation of about 1700 revolutions per minute from immediately after the rotation rises. Suddenly, a large centrifugal force acts on the laundry to one side in the wash tub, resulting in large vibrations and noise. And this vibration is not absorbed even by a balance device such as a snubber bar installed in the upper opening of the washing tank.

It is also conceivable to simply control the length of the induction motor to control the length of the washing tank to interrupt the rotation of the washing tank. However, since the rotational force due to inertia varies depending on the amount of laundry, the result is that when the induction motor is stopped, The rotational speed decreased, but the rotational speed gradually increased by the subsequent operation, and the rotational speed control to solve the defect could not be performed.

However, in recent years, devices for detecting and healing an unbalance of a washing tank generated by the washing of a laundry during dehydration operation have been devised.

Such an unbalance detection method uses a mechanical unbalance switch.

As is well known, in the method using the unbalance switch, a method of detecting unbalance by contact / contact with the switch according to the degree of rotation radius of the washing tub, for example, a voltage interrupting member electrically shorted or opened in place of a washing machine is used. The unbalanced sensing rods at a certain distance from the washing tub to the voltage regulating member so as to be contacted and contacted according to the rotation radius of the washing tub, and between the voltage regulating member and the unbalanced sensing rod with a buffer spring interposed therebetween. The voltage regulating member is electrically shorted or opened by elastic contact with the unbalance sensing rod according to the degree of rotation radius or the contacted contact to detect unbalance of the washing tub.

However, the unbalance detection method of the washing tank using the switch as described above, due to the use of mechanical contacts and springs, due to the poor restoring force of the contact and deterioration of the spring due to the deterioration and complexity of the unbalance detection is not widely used due to the situation to be. In addition, it is impossible to detect the degree of washing of the laundry, and only serves to stop the display and the dehydration operation of the washing machine by determining whether it is unbalanced or balanced.

In addition, as a method of avoiding poor contact and deterioration of the restoring force and complexity of the spring according to the unbalanced switch, the washing tank is gradually rotated when the drainage proceeds about one third without completely draining the water immediately after the rinsing is completed. For example, a dehydration method has been provided for preventing an imbalance of laundry in which the laundry is rotated at high speed so that the laundry is evenly disposed on the wall of the washing tank when the drainage is completed.

As a device for preventing unbalance of laundry in such a general washing machine, there are devices such as those shown in FIGS. 1 and 2.

1 and 2 will be described as an example of the laundry imbalance prevention device of the conventional washing machine.

The laundry imbalance preventing device of the washing machine includes a tank 100 installed in the case 102 with an upper portion opened and a bottom closed, and a damper coupled to an upper portion of the case 102 and a lower portion of the tank 100. 108, a snubber bar 107 which cushions the impact of the tank 100, and a conical shape installed inside the tank 100 and accommodated in a coaxial relationship with the tank 100 to perform dehydration and washing. The washing and dewatering tank 101 (hereinafter referred to as a "washing tank") which is perforated, the induction motor 103 and the induction motor 103 which are installed in the outer lower part of the tank 100 and rotate inverted alternately. The clutch 104 is coupled to the shaft 105 to transmit and decelerate rotational force, and is rotatably installed on the inner bottom of the washing tub 101, and interposed by the clutch 104 to vortex the water in the washing tub 101. Washing is interposed in the pulsator 106 and the water supply line installed in the upper portion of the tank 100 A water supply valve 109 for supplying water to the 101, a drain valve 110 installed at the bottom of the tank 100 to discharge turbid water of the washing tank 101 to the outside of the washing machine, and the washing tank 101. It controls the opening and closing of the water supply / drain valves 109 and 110 through the valve driving unit 113 according to the water level sensor 112 and the water level of the washing tank 101 to detect the water level inside the motor driving unit 114. It is composed of a microprocessor 111 for controlling the driving of the induction motor 103 through.

And, Figure 3 is when the draining through the drain valve 110 after the rinsing stroke 1/3 rotates the washing tank 101 to intermittently dehydrated, when the drainage is complete, rotate the washing tank at the normal speed Signal flow diagram for performing this dehydration.

The laundry imbalance prevention apparatus of the washing machine according to the related art made as described above will be further embodied through FIG. 3.

First, after the washing operation is set through the operation panel, the microprocessor 111 starts the water supply valve 109, the drain valve 110, and the induction motor through the valve driving unit 113 and the motor driving unit 114. 103) to control the washing stroke, rinsing stroke and dehydration stroke in the predetermined sequence.

At this time, the microprocessor 111 receives an input signal generated according to the operation state of the water level sensor 112 for detecting the water level of the washing tank 101 and outputs a control signal in a predetermined state.

Here, when the movable terminal (M) of the water level sensor 112 is connected to the fixed terminal (a), the microprocessor 111 recognizes that the water level is normal in the current washing tank 101, and the water level sensor ( When the movable terminal (M) of 112 is connected to the fixed terminal (b), it is recognized as one-third drainage point from the normal state, and when connected to the fixed terminal (c), it is recognized as a full drainage point. .

Under such conditions, the microprocessor 111 opens the water supply valve 109 such as an electronic control valve through the valve driving unit 113 to supply water into the washing tank 101 at the initial washing stroke.

Thereafter, the microprocessor 111 alternately energizes the induction motor 103 through the motor driver 114. In connection with this, the pulsator 106 also rotates forward and reverse.

The water in the washing tank 101 is vortexed by the alternating forward and reverse rotation of the pulsator 106, thereby causing friction with the laundry to perform the washing operation.

After washing and rinsing in this manner, the microprocessor 111 stops the driving of the induction motor 103 through the motor driving unit 114 and opens the drain valve 110 through the valve driving unit 113. The water in the washing tank 101 is drained.

While the drainage is in progress, the movable terminal M of the water level level sensor 112 approaches the fixed terminal b from the fixed terminal a.

At this time, as shown in FIG. 3, the microprocessor 111 continues to search the water level in the washing tank 101 through the water level sensor 112 (step ST10), and the drainage is 1/3 of the normal state in the washing tank 101. If it has not progressed to the point, that is, if the movable terminal M of the water level sensor 112 of FIG. 2 is not yet in contact with the fixed terminal b, the drainage state is maintained (step ST11). When the drainage proceeds from the normal state of the washing tank 101 to one third, that is, when the movable terminal M of the water level sensor 112 contacts the fixed terminal b, the microprocessor 111 In order to perform intermittent dehydration, intermittent dehydration is performed while increasing the rotational speed of the induction motor 103 through the motor driving unit 114 (steps ST12 and ST13). Of course, drainage continues at this time.

In the state in which the washing tank 101 contains water, that is, the induction motor 103 rotates while the drainage proceeds, the laundry is evenly disposed on the wall of the washing tank by the force of water flow.

As a result, the induction motor 103 gradually increases the rotational speed of the washing tank 101 in the state where the drainage is not finished, so-called intermittent dehydration stroke in which the drainage process and the dehydration stroke are performed at the same time.

When the drainage is completed at the time of gradually increasing the drainage and the washing tank 101 (step ST14), that is, when the movable terminal M of the water level sensor 112 is in contact with the fixed terminal (c), the microprocessor 111 Closes the drain valve 110 through the valve driving unit 113, and also to increase the rotational speed of the induction motor 103 until the end of the entire dehydration time through the motor driving unit 114 to perform this dehydration. Maintained at about 1700 revolutions per minute (ST15) to perform normal bone dehydration stroke

The dehydration operation method for preventing the laundry imbalance of the washing machine according to the prior art described above, intermittent dehydration is performed from the time when the drainage reaches about one-third without completely draining the water in the washing tank after the rinsing of the laundry is finished. This prevents the washing of the laundry and performs the dehydration after the drainage is completed.

However, according to the conventional dewatering operation apparatus described above, it is difficult to accurately set the relationship between the amount of laundry and the degree of drainage, and even if the intermittent dehydration proceeds in a state where the drainage is set to a certain degree, it is induced by the operation after the initial stage. As the number of revolutions of the electric motor rises, unbalance occurs that the laundry is biased to one wall of the washing tank by the centrifugal force of the induction motor.As a result, dehydration is performed during the dehydration time in one pattern regardless of the degree of unbalance. Not only does the administration not proceed properly, but also there is a problem that noise occurs.

In addition, since the program is performed in the order of intermittent dehydration, main dehydration and dehydration completion according to a predetermined time, there is a problem that causes a loss of dehydration progress time and a loss of power.

In recent years, wool products and thin, delicate textiles are often washed in household washing machines. However, even in such a case, in the conventional dehydration operation, the dehydration is performed in one pattern regardless of the unbalance of the laundry, thereby causing a problem that the fabric is badly damaged or wrinkles are caught.

Therefore, the dehydration rate and the energy generated by the dehydration caused by the dehydration in one pattern according to the change of the degree of drainage in the washing tank are prevented, and the loss of the dehydration progress time is minimized while the equivalent of the conventional one. The dehydration operation method of the washing machine which can acquire the above effect is preferable.

Accordingly, the present invention excludes the increase in the error rate of the unbalance due to the contact failure of the unbalanced switch and the restoring force of the spring, and excludes the increase in energy and the dehydration rate due to the loss of the dehydration progress time. In one aspect of the present invention, to detect the amount of unbalance at the time of dehydration administration to eliminate the washing of the laundry to one side according to its degree, to provide a dewatering driving device of the washing machine that can prevent the occurrence of severe vibration or noise There is this.

In another aspect of the present invention, there is an object to remove the loss of dehydration progress time by proceeding the main dehydration without the progress of intermittent dehydration according to the degree of unbalance of the washing tank.

In still another aspect of the present invention, an object of the present invention is to refine the detection of unbalance by reducing the error rate of unbalance and to perform optimal dehydration by changing the intermittent dehydration time and the number of intermittent dehydration.

Dehydration device for a washing machine according to an aspect of the present invention for achieving the above object,

In an operating device for spinning laundry in a case to dehydrate laundry:

An unbalance detection device formed on a bottom surface of the case to sense an unbalance amount due to rotation of an induction motor as a change in resistance value;

Stabilization means for stabilizing a change in voltage according to a change in resistance obtained in the unbalance sensing device; And

The change value of the voltage obtained by the stabilization means is subdivided into at least one detection reference value of the unbalance amount, and the degree of unbalance is determined according to the subdivided detection reference value, and the dehydration time and the number of intermittent dehydration are changed to control the dehydration. A microprocessor;

The microprocessor, the first intermittent dehydration to dehydrate by performing inflated through water supply and drainage according to the granular unbalance degree, the second intermittent dehydration, dehydration without intermittent dehydration by repeatedly dehydrating the induction motor The dehydration operation is controlled by any one of the present dehydration to be performed.

In addition, the present invention, in the operating device for dewatering the laundry by rotating the washing tank in the case:

An unbalance detection device formed on a bottom surface of the case to sense an unbalance amount due to rotation of an induction motor as a change in resistance value;

Stabilization means for stabilizing a change in voltage according to a change in resistance obtained in the unbalance sensing device; And

The change value of the voltage obtained by the stabilization means is subdivided into at least one detection reference value of the unbalance amount, and the degree of unbalance is determined according to the subdivided detection reference value, and the dehydration time and the number of intermittent dehydration are changed to control the dehydration. A microprocessor;

The microprocessor may include: (1) a first intermittent dehydration for dehydration by inflating through water supply and drainage according to the degree of fine unbalance, and (2) a second intermittent dehydration for repeatedly dehydrating the blocking process of the induction motor. (3) It is characterized by controlling the dehydration operation to any one of the present dehydration to perform dehydration without intermittent dehydration.

In addition, the unbalance detection device, the inner curved surface is formed with a rounded slope in the outward direction from the center of the bottom surface of the case; A conductor of a cell unit, the area of which is gradually increased from the concentric surface of the inner curved surface and disposed in the radial direction, and the resistivity value is set differently in the direction of increase of the area; And

A rolling body seated on an upper surface of the conductor and freely moving on a pattern surface of each cell of the conductor along a direction of inclination of the case to generate a specific resistance value of each of the cells; It is characterized by consisting of mercury.

The cells close to the center of the conductor may be divided into a balanced region, and cells other than the balanced region may be divided into an unbalanced region, thereby detecting balance and unbalance as a specific resistance value of the cells in which the rolling body is located.

In this way, the unbalance detection device detects the deflection of the laundry according to the rotation of the induction motor during the dehydration stroke, and the microprocessor changes the operation time and the number of times of the induction motor to dehydrate the unbalanced detection device. It can be seen that.

As a result, by dehydrating the laundry differently with the degree of unbalance of the laundry according to the rotation of the induction motor, the error probability of the unbalance and the time required for dehydration can be shortened, and this dehydration can be performed without unnecessary intermittent dehydration. There is this.

And, there may be a plurality of embodiments of the present invention, the following will be described in detail for the most preferred embodiment.

Through this preferred embodiment, it is possible to better understand the objects, features and advantages of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the dewatering driving device of the washing machine according to the present invention.

In addition, the technique of the present invention can be applied to various products that perform dehydration with rotational force by inertia.

4 and 7 used in the description are not the dehydration operation apparatus of a specific product, but the drawing focuses on various dewatering operation apparatuses capable of dewatering with rotational force by inertia.

In addition, in each figure used for description, the same component may be attached | subjected, and may show the same number, and the overlapping description may be abbreviate | omitted.

In addition, in the following description, the example applied to the washing machine is considered as a dehydration operation method.

4 is a configuration diagram showing an embodiment provided in the description of the dehydration operation apparatus of the washing machine according to the present invention, Figure 5 is a plan view showing in detail the unbalance detection device installed on the case bottom of the washing machine of FIG.

According to the present embodiment, the free movement is disposed at the bottom of the case 102, and the linear resistance is changed in one direction according to the degree of deflection of the laundry according to the rotation of the induction motor 103, thereby changing the resistivity value and changing the intrinsic resistance. An unbalance detection device 200 for detecting an amount of unbalance with a resistance value, a stabilization unit 201 for stabilizing a change in voltage according to a change in intrinsic resistance value input from the unbalance detection device 200, and the stabilized The voltage change value is subdivided into at least one detection reference value of the unbalance amount to determine the degree of unbalance, and according to the determined unbalance degree, the induction motor 103 and the water supply valve through the motor driver 114 and the valve driver 113. 109, the microprocessor 202 for controlling the drain valve 110 to change the dehydration time and the number of intermittent dehydration.

In the above-described unbalance detection apparatus 200, as shown in Figs. 4 and 5, the inner curved surface (200c) and the inner curved surface (200c) is formed rounded with a gentle inclination outward from the center of the bottom surface of the case 102 ), The area is gradually increased from the concentric center and disposed in the radial direction, and is seated on the conductor 200b of the cell unit and the upper surface of the conductor 200b in which the intrinsic resistance value is set differently in the increasing direction of the area. And a rolling body 200a which linearly moves on the pattern surface of each cell of the conductor 200b according to the inclination direction of the case 102 to generate a unique resistance value of each cell.

And, Figure 7 is to open the drain valve 110 in the rinse stroke to completely discharge the water in the washing tank 101 (ST100, ST101) and then detect the amount of unbalance through the unbalance detection device 200 to the detected unbalance amount Accordingly, a signal flow chart for performing dehydration operation by changing the dehydration time and the number of times.

The dehydration operation apparatus of the washing machine according to the present invention thus made performs the following operation with respect to dehydration operation by the degree of unbalance of laundry, without uniform application of dehydration time and recovery and loss of dehydration time.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 4 to 7.

First, after setting the washing stroke through the operation panel not shown in the drawings, the microprocessor 202 starts the water supply valve 109 and the drain valve 110 through the valve driver 113 and the motor driver 114. And control the induction motor 103 to perform the washing stroke in a predetermined sequence, and after the washing stroke is completed, the rinsing stroke is completed by supplying and draining water into the washing tank 101 for a predetermined number of times (steps ST100 and ST101). .

After performing the washing and rinsing as described above, the microprocessor 202 rotates the induction motor 103 at a predetermined speed for dehydration in the unbalance detection routine (step ST102) as shown in FIG. 7 (step ST103). The unbalance amount of the laundry according to the rotation of the electric motor 103 is sensed through the unbalance detection apparatus 200 which will be described later.

That is, the unbalance detecting apparatus 200 may include the inner curved surface 200c formed on the case 102, the conductor 200b disposed on a cell unit with a specific resistance value on the inner curved surface, and the conductive rolling body 200a. And, the rolling body (200a) is characterized in that it is made of a material such as mercury excellent in cohesion and slope responsive to rolling freely along the pattern surface of each cell of the conductor (200b).

Subsequently, when the induction motor 103 is energized to perform dehydration in a state where the unbalance detection apparatus 200 is disposed as described above, a balance or unbalance of the case 102 may occur according to the degree of deflection of the laundry in the washing tank 101. Done.

If the laundry is in an unbalanced state biased against one wall of the washing tub 101, the case 102 is tilted toward the side where the laundry is driven.

When the case 102 is inclined in one direction due to the deflection of the laundry, as shown in FIG. 6B, the rolling body 200a of the unbalance detecting apparatus 200 is centered around the inner curved surface 200c according to the degree of inclination thereof. It moves while being in contact with the pattern surface of each cell of) and energizes the corresponding cell of the conductor 200b.

For example, as shown in FIG. 6B, the region of the conductor 200b in which the rolling body 200a is located when the unbalanced state of the case 102 is about medium is referred to as A2, and the rolling in the case where the unbalanced state of the case 102 is severe. The area of the conductor 200b in which the sieve 200a is located is called A3, and the area of the conductor 200b in which the rolling body 200a is located when the unbalanced state of the case 102 is very weak or in a balanced state is referred to as A3. Assume that A1 is the central portion of the conductor 200b.

As described above, the rolling body 200a moves while being in contact with the pattern surface of each cell of the conductor 200b according to the degree of inclination of the case 102 with respect to the smoothly rounded inner curved surface 200c. When stopped in the areas A1, A2, and A3, the corresponding cell of the conductor 200b having its own resistance value is energized to change the voltage value according to the corresponding resistance value.

The voltage value changed according to the specific resistance of the region is input to the stabilization unit 201 of FIG. 4.

The stabilization unit 201 removes noise included by disturbances and the like from the voltage value input from the unbalance detecting apparatus 200 and provides it to the microprocessor 202.

The microprocessor 202 determines the unbalance amount by comparing the change value of the voltage input from the stabilizing unit 201 with a detection reference value of at least one unbalance amount, that is, the first to third detection reference values (step) ST104).

If it is determined in step ST104 that the amount of unbalance is large, for example, as shown in FIG. 6B, if the rolling body 200a is located in the region A3 of the conductor 200b and is at a predetermined first reference detection value, the microprocessor 202 ) Supplies water into the washing tank 101 through the water supply valve 109 (step ST105) and performs an inflating stroke for a predetermined time (step ST106).

In this way, by supplying water to the washing tank 101 proceeds to the inflated stroke, as a result, the laundry is arranged evenly on the wall of the washing tank 101, the amount of unbalance is reduced.

Thereafter, when the inflated stroke is completed, the drain valve 110 is opened again to completely discharge the water in the washing tank 101 (steps ST107 and ST108).

When draining is completed through step ST107, the number of times of inflation is increased by one (step ST109) and compared with the set reference number N1 (step ST110).

As a result of the comparison in step ST110, if a large amount of unbalance occurs even in a state where the current inflated number of times is equal to or greater than the reference number N1, an unbalance error is displayed through the display unit not shown in the drawing (step ST111).

When the number of times of inflated progress is less than or equal to the reference number N1, the process after step ST102 is repeated to perform a so-called intermittent dehydration stroke.

When the amount of unbalance is determined as the result of the determination in step ST104, for example, as shown in FIG. 6B, when the rolling member 200a is located in the area A2 of the conductor 200b and is at the second detection reference value, the microprocessor 202 Blocks the energization of the induction motor 103 until a predetermined time elapses (step ST112, ST113).

At this time, even if the electric current of the induction motor 103 is cut off, the rotation of the washing tub 101 is not stopped and the rotation of the force is performed.

After a certain time has elapsed, the number of cutoffs of the induction motor 103 is increased by one (step ST114) and compared with a predetermined reference cutoff frequency N2 (step ST115).

As such, by repeating the process of interrupting the energization of the induction motor 103 for a predetermined time, the laundry is arranged evenly on the wall of the washing tub 101, thereby reducing the amount of unbalance. As a result, if the amount of unbalance does not decrease even when the current cutoff frequency of the induction motor 103 is greater than or equal to the reference cutoff frequency N2, the display unit displays an unbalance error through the display unit as described above (step ST116).

When the number of cutoffs of the induction motor 103 is less than or equal to the reference cutoff frequency N2, the process after step ST102 is repeated to perform the so-called intermittent dehydration stroke.

As described above, by repeatedly performing dehydration by repeating the inflating stroke and the blocking of the induction motor 103 according to the degree of unbalance, the rotation of the washing tub 101 does not greatly shake, and the laundry in the washing tub 103 during this time. Since the silver is removed to some extent to lighten the weight, the eccentric load is less applied and is not shaken even when the process is advanced and full-scale dehydration at high speed is performed.

On the other hand, if the amount of unbalance is small or balanced in step ST104, that is, as shown in FIG. 6A, the rolling body 200a of the unbalance detecting apparatus 200 is located in the area A1 of the conductor 200b to detect the third balance. If it is at the reference value, the rotational speed of the induction motor 103 is immediately increased without the progress of the so-called intermittent dehydration described above (step ST117), and dehydration proceeds for the entire dehydration time (step ST118).

On the other hand, as a comparative example, unlike the conventional technique, that is, in the state in which the water in the washing tank is drained about one third at the beginning of the dehydration stroke, the dehydration stroke is performed in one dehydration pattern regardless of the unbalance amount. The invention detects the amount of unbalance of the washing machine according to the degree of deflection of laundry in the initial stage of dehydration and it can be seen that dehydration is performed by changing the dehydration time and the number of intermittent dehydration, respectively, according to the sensed unbalance.

In this result, according to the present invention it can be seen that not only the energy savings equivalent to those of the conventional one, but also to reduce the dehydration time according to the degree of unbalance while increasing the granularity and detection rate of the unbalance amount detection of the washing machine.

As described above, in the present embodiment by detecting the amount of unbalance of the washing machine due to the bias of the laundry during the washing operation, especially in the dehydration operation by performing dehydration accurately in different ways, unbalance detection error according to the prior art, wrinkle of the laundry and The increase in energy due to the dehydration time does not occur.

According to this application example, according to the degree of unbalance of laundry, the dewatering method of the washing machine is further subdivided than that of a conventional washing machine to perform dehydration, thereby improving product reliability and stabilizing product performance compared to laundry.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

What is clear from the above description is that according to the dehydration operation control apparatus for a washing machine according to the present invention, the following effects are derived by varying the dehydration method according to the degree of unbalance of the washing machine.

1. By inflating for a predetermined number of times, the probability of unbalance error is minimized.

2. It can prevent the shortening of dehydration time and wrinkle of laundry by further detecting the degree of unbalance.

3. If the unbalance of the washing machine is fine or balanced, by performing this dehydration immediately without going through the intermittent dehydration, the time required for dehydration is reduced, thereby reducing the energy consumption.

1 is a view showing the configuration of a general washing machine provided in the description of laundry imbalance prevention,

2 is a block diagram of a laundry imbalance prevention device of a washing machine according to the prior art,

3 is a signal flow diagram illustrating a dehydration stroke of the washing machine according to FIG. 2;

Figure 4 is a block diagram showing an embodiment provided for the description of the dewatering driving device of the washing machine according to the present invention,

Figure 5 is a plan view showing in more detail the unbalance detection device installed on the case bottom of the washing machine of Figure 4,

6 is a view showing an operating state of the unbalance detection device of Figure 5 according to the degree of bias of the laundry,

Figure 6a is a diagram showing a balanced state in which the laundry is evenly distributed on the wall of the washing tank,

Figure 6b is a diagram showing the unbalanced state in which the laundry is biased to one wall of the washing tank,

7 is a signal flow diagram illustrating an embodiment provided for describing a dehydration operation method of a washing machine according to the present invention.

<Description of the code | symbol about the principal part of drawing>

103: induction motor 109: water supply valve

110: drain valve 114: motor drive unit

200: unbalance detection device 200a: rolling body

200b: conductor 200c: inner surface

201: stabilizer 202: microprocessor

Claims (3)

In an operating device for spinning laundry in a case to dehydrate laundry: An unbalance detection device formed on a bottom surface of the case to sense an unbalance amount due to rotation of an induction motor as a change in resistance value; Stabilization means for stabilizing a change in voltage according to a change in resistance obtained in the unbalance sensing device; And The change value of the voltage obtained by the stabilization means is subdivided into at least one detection reference value of the unbalance amount, and the degree of unbalance is determined according to the subdivided detection reference value, and the dehydration time and the number of intermittent dehydration are changed to control the dehydration. A microprocessor; The microprocessor, the first intermittent dehydration to dehydrate by performing inflated through water supply and drainage according to the granular unbalance degree, the second intermittent dehydration, dehydration without intermittent dehydration by repeatedly dehydrating the induction motor Dehydration operation apparatus of the washing machine, characterized in that for controlling the dehydration operation to any one of the dehydration. The method of claim 1, The unbalance detection device, An inner curved surface formed with a gentle inclination toward the outside from the center of the bottom surface of the case; A conductor of a cell unit, the area of which is gradually increased from the concentric surface of the inner curved surface and disposed in the radial direction, and the resistivity value is set differently in the direction of increase of the area; And A rolling body seated on an upper surface of the conductor and freely moving on a pattern surface of each cell of the conductor along a direction of inclination of the case to generate a specific resistance value of each of the cells; A dehydration driving device for a washing machine comprising mercury. The method of claim 2, Dehydration operation of the washing machine, characterized in that the cells close to the center of the conductor is divided into a balanced region, and cells other than the balanced region are divided into an unbalanced region, thereby detecting balance and unbalance as a specific resistance value of the cells in which the rolling body is located. Device.