KR20120110518A - Method for washing and washing machine - Google Patents

Abstract

PURPOSE: A washing method and a laundry machine thereof are provided to efficiently the quantity of laundry inserted into a drum by measuring a load applied to a leg of the laundry machine. CONSTITUTION: A drum is rotated at a fixed speed(S610). A static load is measured for a fixed time after the drum is stopped(S620). The measured load is filtered(S630). The quantity of laundry is calculated(S640). The quantity of laundry stored in the drum is measured through a load measured by a load-measuring supporter. After the load measured by the load-measuring supporter is added, the load is doubly measured. [Reference numerals] (AA) Start; (BB) End; (S610) Rotating a drum at a fixed speed; (S620) Measuring a static load for a fixed time; (S630) Filtering the measured load; (S640) Calculating the quantity of laundry

Description

Laundry method and washing machine {Method for washing and washing machine}

The present invention relates to a washing method and a washing machine, and more particularly, to a load measuring supporter for measuring the load of the washing machine and a washing machine including the same.

In general, a washing machine is a device that cleans through a process such as washing, rinsing, and dehydrating to remove contamination on clothes, bedding, etc. (hereinafter, referred to as 'po') by using water, detergent, and mechanical action.

Washing machines are classified into agitator type, pulsator type and drum type washing machines.

The stirring type washes by rotating the laundry rod rising to the left and right in the center of the washing tank, and the vortex type washes by rotating the disk-shaped rotary blade formed at the lower part of the washing tank to the left and right by using friction force between the water flow and the cloth, and the drum type inside the drum. Add water, detergent and cloth to wash the drum by rotating it.

The drum washing machine is equipped with a tub in which washing water is accommodated inside a cabinet forming an exterior, a drum in which a cloth is accommodated is disposed inside the tub, and a motor for rotating the drum is mounted on the rear side of the tub, and the tub is mounted on the motor. The drive shaft connected to the back side of the drum penetrates through is built up. The inside of the drum is equipped with a lifter to raise the gun when the drum rotates.

Such a washing machine requires a variety of information such as leveling, quantity measurement, and eccentricity measurement.

The problem to be solved by the present invention is to efficiently measure the load of the washing machine.

Another object of the present invention is to measure the load of the washing machine to measure the degree of leveling, the amount of foam, the degree of eccentricity of the fabric and the like.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a washing machine according to an embodiment of the present invention, the bottom is a rectangular cabinet; A drum disposed in the cabinet to accommodate the cloth; A load measuring supporter disposed at two corners of the bottom of the cabinet to support the cabinet and measure a load; It includes a control unit for measuring the amount of cloth contained in the drum by the load measured by the load measuring supporter.

In order to achieve the above object, a washing method according to an embodiment of the present invention, the load measuring supporter disposed on two corners of the bottom of the cabinet to support the cabinet measures the load; And measuring the amount of cloth contained in the drum by the load measured by the load measuring supporter.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the washing machine of the present invention has one or more of the following effects.

First, there is an advantage that can measure the load of the washing machine with a simple device.

Secondly, the load cell for measuring the load is effectively mounted on the legs of the washing machine.

Third, there is an advantage of removing the noise according to the characteristics of the load measured the electrical signal converted in the shock load cell.

Fourth, there is also an advantage that can efficiently measure the leveling level of the washing machine by measuring the load applied to the legs of the washing machine.

Fifth, by measuring the load applied to the leg of the washing machine there is an advantage that can be measured for the amount of cloth for the cloth efficiently put into the drum.

Sixth, there is an advantage that can efficiently measure the eccentricity of the fabric by measuring the load applied to the legs of the washing machine.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view illustrating a washing machine according to an embodiment of the present invention, and FIGS. 2 and 3 are internal structural views of the washing machine of FIG. 1.
4 is a schematic view showing a load measuring supporter of a washing machine according to an embodiment of the present invention, FIG. 5 is a perspective view of the load measuring supporter shown in FIG. 4, and FIG. 6 is a view of the load measuring supporter shown in FIG. 4. It is a cross section.
7 is a block diagram of a washing machine according to an embodiment of the present invention.
Figure 8 shows the arrangement of the supporter of the washing machine according to an embodiment of the present invention.
9 is a flowchart illustrating a leveling method in the laundry method according to an embodiment of the present invention.
10 is a graph showing a load value applied to the supporter according to the height of the specific supporter in the washing machine according to an embodiment of the present invention.
FIG. 11 is a diagram illustrating converting an analog electric signal for a static load measured in a washing machine according to an embodiment of the present invention into a digital electric signal.
12A to 12B are views illustrating various methods of displaying a leveling state in a washing machine according to an embodiment of the present invention.
13 is a view showing the entire stroke of the washing machine according to an embodiment of the present invention.
14 is a flowchart illustrating a method of measuring a quantity of laundry in a laundry method according to an embodiment of the present invention.
15 is a view showing a rotational speed change of the drum during dehydration operation according to an embodiment of the present invention.
16 is a flowchart illustrating a method for measuring the degree of eccentricity of the cloth in the laundry method according to an embodiment of the present invention.
FIG. 17 is a diagram illustrating converting an analog electric signal for a dynamic load measured in a washing machine into a digital electric signal according to an embodiment of the present invention.
18 is a diagram illustrating a method of measuring left and right eccentricity in a washing machine according to an embodiment of the present invention.
19 is a view illustrating a method for measuring the degree of front and rear eccentricity in a washing machine according to an embodiment of the present invention.
20 is a flowchart illustrating a resonance avoiding method according to an embodiment of the present invention.
21 is a view showing a filter for the dynamic load measured at high speed in the washing machine according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving the same will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for describing a washing machine according to embodiments of the present invention.

1 is a perspective view illustrating a washing machine according to an embodiment of the present invention, and FIGS. 2 and 3 are internal structural views of the washing machine of FIG. 1.

Washing machine 100 according to an embodiment of the present invention, the cabinet 110 forming the appearance, the door 170 for opening and closing one side of the cabinet 110 to enter and exit the cloth, and the cabinet 110 is disposed inside the cabinet Tub 122 supported by 110, drum 124 is disposed inside the tub 122 is rotated by inserting the gun, the control panel 190 that accepts user input and displays the washing machine status, cabinet It includes a supporter 200 for supporting (110).

The cabinet 110 is a case forming an exterior of the washing machine 100. The cabinet 110 forms an inner space such that the tub 122 and the drum 124 are disposed therein.

The cabinet 110 includes a main panel 111 forming side and rear surfaces, a front panel 112 forming a front surface, a top panel 113 forming an upper surface, a row panel 118 forming a lower surface, and , A panel frame 115 provided at the front upper side of the cabinet 110, and a row frame 116 provided at the lower side of the cabinet 110.

The main panel 111 is a panel forming side and rear surfaces, and forms an inner space. Side and back of the main panel may be formed as a separate panel, in this embodiment is formed integrally. A top panel 113 is provided above the main panel 111, a low panel 118 is provided below, and a front panel 112 is provided at the front thereof.

Side frames 114 may be provided on upper sides of both sides of the main panel 111. The side frame 114 combines the main panel 111 and the top panel 113. The side frame 114 secures the structural strength and rigidity of the main panel 111. Side frame 114 is coupled to a spring 150 for supporting the tub 122. According to an embodiment, the side frame 114 may be formed by bending the upper sides of both sides of the main panel 111.

The front panel 112 is a panel forming a front surface, and forms an inner space together with the main panel 111. The front panel 112 is formed with a cloth access hole 112a to enable the cloth to enter and exit. The front panel 112 is rotatably coupled to the door 170 for opening and closing the four entrance hole (112a).

When the washing machine 100 includes a pedestal as in the present embodiment, the pedestal panel 117 may be coupled to the lower side of the main panel 111. In some embodiments, the main panel 111 and the pedestal panel 117 may be integrally formed. The drawer 119 may be provided in the space where the pedestal is formed. The drawer 119 can accommodate accessories, such as a tool, a manual, detergent, bleach, etc.

The row panel 118 forms a lower surface of the internal space formed by the main panel 111. The row panel 118 is coupled to the lower side of the main panel 111. In this embodiment, the row panel 118 is provided between the main panel 111 and the pedestal panel 117, the inner space formed by the main panel and the space formed by the pedestal panel 117 to accommodate the drawer 119 It serves as a partition to separate the. The row panel 118 secures the structural strength and rigidity of the cabinet 110. The lower panel 118 is coupled with a damper 140 supporting the tub 122.

The panel frame 115 is coupled to both side front upper sides of the main panel 111 to maintain the shape of the main panel 111 and to secure structural strength and rigidity of the main panel 111. The panel frame 115 is provided with a control panel 190. The panel frame 115 is provided with a detergent box 180 to withdraw. According to an embodiment, the panel frame 115 is coupled with the front panel 112.

The low frame 116 is coupled to the lower side of the pedestal panel 117 to maintain the shape of the pedestal panel 117, to ensure the structural strength and rigidity of the pedestal panel 117. The low frame 116 is coupled to both side lower sides of the pedestal panel 117 and may be provided in plurality in front and rear. In some embodiments, when there is no pedestal panel 117, the low frame 116 may be coupled to the lower side of the main panel 111.

The supporter 200 is coupled to the low frame 116. The low frame 116 preferably forms a bottom of the substantially rectangular frame 110 so that the supporter 200 can support the load of the washing machine 100.

Tub 122 is buffered by the spring 150 and the damper 140 in the cabinet 110. Tub 122 receives the wash water. The drum 124 is disposed inside the tub 122.

The drum 124 is rotated by receiving the cloth. The drum 124 is formed with a plurality of through holes so that the wash water passes. The inner wall of the drum 124 may be a lifter (not shown) for lifting the gun to a certain height when the drum rotates. The drum rotates about the rotation axis R by a driving unit (not shown).

The control panel 190 includes an input unit 191 for receiving various operation commands such as a washing course selection, an operation time and a reservation for each stroke, and a display unit 192 for displaying an operating state of the washing machine 100. It may be provided.

The washing course includes a lingerie / wool course, a boiling course, a speed wash course, a functional clothing course, and a quiet course depending on the type and function of the fabric. The operation of the washing machine is largely divided into a washing stroke, a rinsing stroke, and a dehydrating stroke, and water, washing, rinsing, draining, dehydration or drying are performed in each stroke.

Detergent box 180 is a detergent such as laundry detergent, fabric softener or bleach is accommodated. The detergent box 180 is provided to be pulled out on the front of the cabinet 110. Detergent in the detergent box 180 is mixed with the wash water at the time of supplying the wash water flows into the tub 122.

The supporter 200 supports the cabinet 110 from the bottom surface on which the washing machine 100 is installed. The supporter 200 is coupled to the lower side of the cabinet 110 to be in contact with the bottom surface so as to support the load of the washing machine 100. It is preferable that the supporters 200 are provided in plural and disposed at four corners of the cabinet 110 having a substantially rectangular bottom.

The supporter 200 includes a general supporter 220 supporting the cabinet 110 and a load measuring supporter 210 supporting the cabinet 110 to measure a load.

The general supporter 220 may be coupled to the cabinet 110 so that the height can be adjusted by rotating. At least one general supporter 220 may be provided and provided at at least one corner of the cabinet 110 having a substantially rectangular bottom. The general supporter 220 includes a general leg 221 which is screwed with the low frame 116 of the cabinet 110 and supports the cabinet 110 from the bottom surface. A thread is formed in the general leg 221 and is coupled to the low frame 116. The user may adjust the height by rotating the general leg 221. The general leg 221 is in contact with the bottom surface to support the cabinet 110.

The load measuring supporter 210 is coupled to the cabinet 110 so that the height can be adjusted. The load measuring supporter 210 may measure a load applied to itself. At least one load measuring supporter 210 may be provided and provided at at least one corner of the cabinet 110 having a substantially rectangular shape. Detailed description of the load measuring supporter 210 will be described later with reference to FIG. 4.

4 is a schematic view showing a load measuring supporter of a washing machine according to an embodiment of the present invention, FIG. 5 is a perspective view of the load measuring supporter shown in FIG. 4, and FIG. 6 is a view of the load measuring supporter shown in FIG. 4. It is a cross section.

Load measuring supporter 210 according to an embodiment of the present invention, one side is coupled to the cabinet 110 and the load cell 215 for converting and outputting the applied load to an analog electric signal, and the other side of the load cell 215 and The load cell leg 211 is coupled to support the cabinet 110 from the bottom surface.

The load cell 215 is preferably formed in a rectangular parallelepiped shape. One side of the long direction of the load cell 215 having a rectangular parallelepiped shape is coupled to the low frame 116 of the cabinet 110. The rectangular parallelepiped load cell 215 is preferably disposed at an edge of the low frame 116 such that its long direction is parallel to the direction of the rotation axis R of the drum 124.

One side of the load cell 215 and the low frame 116 may be coupled in various ways by bolts, screws, welding, and the like, and in this embodiment are coupled by the load cell fixing bolts 217. The low frame 116 is preferably provided with a load cell fixing support part 116a which protrudes toward the load cell 215 so as to be in contact with one side of the load cell 215 and to which the load cell fixing bolt 217 is coupled. The load cell fixing support part 116a is formed so that the other side of the load cell 215 is spaced apart from the row frame 116. The other side of the load cell 215 in the longitudinal direction is coupled to the load cell leg 211.

The load cell leg 211 is in contact with the bottom surface to support the cabinet 110. The load cell leg 211 is screwed with the other side of the load cell 215 so that the height can be adjusted by rotating. The load cell leg 211 is threaded and screwed with the load cell 215. The user may adjust the height by rotating the load cell leg 211. The load cell stopper 212 is preferably screwed to the load cell leg 211 so that the load cell leg 211 is not rotated. The load cell stopper 212 is preferably disposed between the low frame 116 and the load cell 215. The user adjusts the height by rotating the load cell legs 211 and then rotates the load cell stopper 212 to fix the load cell legs 211 so as not to rotate.

The load cell leg 211 is not coupled to the low frame 116 and penetrates and is coupled to the other side of the load cell 215. The load cell 215 is not directly loaded from the low frame 116, but is combined with the load cell 215 coupled to the low frame 116 to receive a load from the load cell 215.

The rectangular shape of the load cell 215 is coupled to the low frame 116 on one side in the longitudinal direction and the other side of the longitudinal direction on the load cell leg 211, so that the force acting is spaced apart from each other. The force transmitted from the low frame 116 is formed in the ground direction on one side of the load cell 215, and the force transmitted from the load cell leg 211 is formed in the opposite direction to the ground on the other side of the load cell 215. The force transmitted from the low frame 116 on one side of the load cell 215 and the force transmitted from the load cell leg 211 on the other side of the load cell 215 do not intersect with each other and operate in opposite directions in parallel. Therefore, the shear stress is generated in the load cell 215 and deforms as shown in 215 'of FIG. 6, and the amount of deformation is detected as an electric signal to measure the load.

The load cell hole 215a is preferably formed at the center portion of the load cell 215 so that deformation can be easily caused by shear stress. The load cell hole 215a is formed in the vertical direction of each force between the force transmitted from the low frame 116 at one side of the load cell 215 and the force transmitted from the load cell leg 211 at the other side of the load cell 215. It is preferable to be.

7 is a block diagram of a washing machine according to an embodiment of the present invention.

The washing machine according to an embodiment of the present invention includes a power supply unit 310 for supplying power to the load cell 215 and the amplifier 331, a load cell 215 for outputting a load as an analog electric signal, and the load cell 215. The load cell signal processor 330 converts the output analog electric signal into a digital electric signal and removes noise, and the controller 350 receives a digital electric signal from the load cell signal processor 330 and performs various operations.

The load cell 215 outputs an amount of deformation generated under load as an analog electric signal. The load cell 215 may be implemented in various ways. Preferably, the load cell 215 is formed of a wheatstone bridge, and converts a deformation generated under a load into an electrical resistance to output an analog electric signal.

As described above, the load cell 215 is provided at at least one corner of the cabinet 110 having a substantially rectangular shape and outputs a load transmitted from the cabinet 110 as an analog electric signal. The load cell 215 receives power from the power supply unit 310 and outputs an analog electric signal to the load cell signal processing unit 330.

The load cell signal processing unit 330 includes an amplifier 331 for amplifying the analog electric signal output from the load cell 215, a noise filter 333 for removing noise from the analog electric signal amplified by the amplifier 331, and noise. The filter 333 includes a digital filter 335 that converts an analog electrical signal from which noise is removed to a digital electrical signal to remove noise.

The amplifier 331 receives the analog electric signal output from the load cell 215 from the power supply unit 310, converts the analog electric signal into a voltage level at which digital change is possible, and amplifies it.

The noise filter 333 may be implemented in various forms to remove noise from the electrical signal amplified by the amplifier 331. In this embodiment, the noise filter 333 is a low pass filter.

The digital filter 335 is a 16-bit arithmetic microcomputer, which converts analog electric signals into digital electric signals with high precision. The digital filter 335 removes noise of the analog electric signal and converts the digital electric signal. The digital filter 335 takes an average value of the analog electric signal for a static load with little change in the measured load, or performs a first-order integration on the analog electric signal for a dynamic load whose load changes periodically. The method removes noise. A detailed description of the digital filter 335 will be described later with reference to FIGS. 11, 17, and 21.

Figure 8 shows the arrangement of the supporter of the washing machine according to an embodiment of the present invention.

Referring to FIG. 8, the supporters 200 of the washing machine 100 according to the exemplary embodiment of the present invention are disposed at four corners of the bottom of the substantially rectangular cabinet 110. Hereinafter, in the washing machine 100, the direction in which the door 170 is disposed based on the direction of the rotation axis R of the drum 124 is divided into the front and the opposite directions to the rear, and the drum when the washing machine 100 is viewed from above. (124) The left and right sides are divided based on the rotation shaft (R). The supporter 200 includes a supporter 200a disposed at the front left side of the washing machine 100, a supporter 200b disposed at the rear left side, a supporter 200c disposed at the rear right side, and a supporter disposed at the front right side ( 200d).

At this time, m1 is the load applied to the supporter 200a disposed at the front left side, m2 is the load applied to the supporter 200b disposed at the rear left side, and m3 is the load applied to the supporter 200c disposed at the rear right side. , The load applied to the supporter 200d disposed on the front right side is m4. Further, the distance from the center of gravity L of the washing machine 100 to the load center of the supporter 200 disposed on the left side of the washing machine 100 is x1, and the distance from the center of load of the supporter 200 arranged on the right side is determined. x2, the distance to the load center of the supporter 200 arrange | positioned at the front is y1, and the distance to the load center of the supporter 200 arrange | positioned at the rear is y2.

At least one of a supporter 200a disposed at the front left side of the washing machine 100, a supporter 200b disposed at the rear left side, a supporter 200c disposed at the rear right side, and a supporter 200d disposed at the front right side. May be the load measuring supporter 210, and the rest may be the general supporter 220.

9 is a flowchart illustrating a leveling method in the laundry method according to an embodiment of the present invention.

Leveling refers to leveling the washing machine 100 when the washing machine 100 is installed. When the leveling is not performed, noise and vibration are caused to the washing machine 100 when the drum 124 is rotated. Leveling is important horizontal between the left and right of the washing machine 100, the horizontal between the front and rear is not a big problem. Referring to FIG. 8, a moment is generated as the center of gravity L of the washing machine 100 is eccentrically left or right about the rotation axis R, so that the drum 124 may rotate about the rotation axis R. When the washing machine 100 causes noise and vibration. On the contrary, since the center of gravity L of the washing machine 100 is eccentrically forward or backward, almost no moment is generated even when the drum 124 rotates about the rotation axis R, causing noise and vibration to the washing machine 100. It is insignificant.

In FIG. 8, when the drum 124 rotates about the rotation axis, the moment generated at the left side of the washing machine 100 is x1 * (m1 + m2), and the moment generated at the right side of the washing machine 100 is x2 * ( m3 + m4), when x1 and x2 are constant, if x1 * (m1 + m2) + x2 * (m3 + m4) = 0, noise and vibration are not induced in the washing machine 100.

In this embodiment, the leveling adjusts the height of the supporter 200 to adjust the leveling of the washing machine 100, and measures the load applied to the supporter 200 to measure the leveling state.

In order to measure the load applied to the supporter 200, the supporter 200a disposed at the front left side, the supporter 200b disposed at the rear left side, the supporter 200c disposed at the rear right side, and the front right side disposed At least one of the supporters 200d may be the load measuring supporter 210.

In this embodiment, one load measuring supporter 210 is disposed at one corner of the bottom of the cabinet 110, which is substantially rectangular, and the general supporter 220 is disposed at the other corner of the bottom of the cabinet 110.

The load measuring supporter 210 is disposed only at one corner of the four corners of the bottom of the cabinet 110, since the center of gravity L of the washing machine 100 does not change, only the load applied to one supporter 200. This is because the load applied to the remaining supporters 200 can be known.

Referring to FIG. 8, when the center of gravity L of the washing machine 100 is constant, x1, x2, y1, and y2 are constant, (m1 + m2), (m2 + m3), (m3 + m4), And (m4 + m1) are constant. Therefore, when the load applied to one supporter 200 increases by a, the load applied to the other supporter 200 increases or decreases by a. That is, when m1 '= m1 + a, m2' = m2-a, m3 '= m3 + a, m4' = m4-a.

In addition, if the height of one supporter 200 is adjusted, the load applied to each of the entire supporters 200 increases or decreases constantly, thereby adjusting and leveling the height of one supporter 200.

Accordingly, when the leveling is correct, the reference load value applied to the supporter 200 and the load value changed when the height of the specific supporter 200 is adjusted are determined, and one supporter 200 is installed when the washing machine 100 is installed. By comparing the load value applied to) with the reference load value it can be seen how much the height of the specific supporter 200 is adjusted. At this time, the supporter 200 for measuring the load value and the specific supporter 200 for adjusting the height need not be the same supporter 200. The description thereof will be described later with reference to FIG. 10.

Leveling method according to an embodiment of the present invention is as follows.

First, after installing the washing machine 100 and enters the leveling mode (S410). The leveling mode is a mode in which the washing machine 100 performs a specific operation for leveling, and is input by the user installing the washing machine through the input unit 191 of the control panel 190.

When the leveling mode is input, it is displayed on the display unit 192 of the control panel 190 to inject the gun into the drum 124 (S420). This is to rotate the drum 124 in a state where the cloth is accommodated in the drum 124 to stably position the washing machine 100 from the bottom surface. The cloth to be inserted into the drum 124 needs to specify the type and number. The display unit 192 of the control panel 190 is preferably displayed by specifying the type and number of cloth, such as "put three pieces of towel in the drum".

After the gun is put into the drum 124, a start command is input (S430). The user inputs the start command by closing the door 170 and pressing the start button of the input unit 191 of the control panel 190 after inserting the gun into the drum 124.

When the start command is input, the drum 124 is rotated at constant speed (S440). According to the input start command, the control unit 350 accelerates the drum 124 and rotates for a predetermined time at a constant speed, and then stops the drum 124. The drum 124 rotates at a constant speed for a predetermined time to stably position the washing machine 100 from the bottom surface.

After the drum 124 stops, the static load is measured for a predetermined time (S450). The load measuring supporter 210 disposed at one corner of the bottom of the substantially rectangular cabinet 110 measures the load applied for a predetermined time. The load measuring supporter 210 includes a supporter 200a disposed at the front left side of the washing machine 100, a supporter 200b disposed at the rear left side, a supporter 200c disposed at the rear right side, and disposed at the front right side. It may be one of the supporters 200d, and the rest is a general supporter 220.

The load measured by the load supporter 210 is a load measured in a state in which the drum 124 of the washing machine 100 does not rotate, and thus corresponds to a static load in which the measured value does not change significantly. The static load applied by the load cell 215 of the load measuring supporter 210 is converted into an analog electric signal and output to the load cell signal processing unit 330.

The measured static load is filtered (S460). The load cell signal processor 330 filters the analog electrical signal output by the load cell 215 of the load measuring supporter 210. The amplifier 331 of the load cell signal processor 330 amplifies the analog electrical signal output from the load cell 215, the noise filter 333 removes noise from the amplified analog electrical signal, and the digital filter 335 noise The noise is removed by converting the removed analog electric signal into a digital electric signal. According to an embodiment, the amplifier 331 and / or the noise filter 333 may be excluded.

The amplifier 331 receives the analog electric signal output from the load cell 215 from the power supply unit 310, converts the analog electric signal into a voltage level at which digital change is possible, and amplifies it.

The noise filter 333 may be implemented in various forms to remove noise from the electrical signal amplified by the amplifier 331. In this embodiment, the noise filter 333 is a low pass filter that removes high frequency components above a specific frequency. .

The digital filter 335 removes noise of the analog electric signal and converts the digital electric signal. The digital filter 335 removes noise by taking an average value of the analog electric signal with respect to the static load and converts it into a digital electric signal. Detailed description thereof will be described later with reference to FIG. 11.

The leveling state of the washing machine 100 is calculated (S470). The control unit 350 calculates a leveling state by comparing the static load value, from which the noise is removed from the load cell signal processing unit 330 and converted into a digital electric signal, with a reference load value. The description thereof will be described later with reference to FIG. 10.

The leveling state of the washing machine 100 is displayed (S480). The leveling state calculated by the controller 350 is displayed to the user through the display unit 192 of the control panel 190. Detailed description thereof will be described later with reference to FIGS. 12A to 12C.

10 is a graph showing a load value applied to the supporter according to the height of the specific supporter in the washing machine according to an embodiment of the present invention.

As shown in FIG. 10, the load value changed when the height of the specific supporter 200 is adjusted in the washing machine 100 is determined in advance, and the reference load value at which the leveling is performed is determined. The horizontal axis of the graph of FIG. 10 is a pitch value at which the specific supporter 200 is rotated to adjust the height, and the vertical axis is a load value applied to the supporter 200 for each pitch value. In the present embodiment, the load value applied to the supporter 200 when the supporter 200 is rotated clockwise in units of 1/8 pitch at zero. Although shown in the form of a graph in FIG. 10, the control unit 350 of the actual washing machine 100 is stored in the form of a look-up table.

The specific supporter 200 whose pitch value is changed, that is, the height is changed, includes a supporter 200a disposed at the front left side, a supporter 200b disposed at the rear left side, a supporter 200c disposed at the rear right side, Any one of the supporters 200d disposed at the front right side may be a load measuring supporter 210, and may be a general supporter 220. That is, the specific supporter 200 whose pitch value changes is not necessarily the load measuring supporter 210. However, the specific supporter 200 to change the pitch value should be recognized by the user at which position of the supporter 200.

The load measuring supporter 210 in which the load is measured includes a supporter 200a disposed at the front left side, a supporter 200b disposed at the rear left side, a supporter 200c disposed at the rear right side, and a supporter disposed at the front right side. Any one of 200d, and in this embodiment, the supporter 200a disposed on the front left side is the load measuring supporter 210. In addition, in this embodiment, the pitch value of the specific supporter 200 in which the pitch value is changed when the leveling is correct is 5/8 pitch, and at this time, the reference load value, which is the load value applied to the load measuring supporter 210, is M1. to be.

When the load value measured by the load measuring supporter 210 after installation of the washing machine 100 is m1, the controller 350 determines that the leveling is not correct because the measured load value m1 is different from the reference load value M1. In addition, the controller 350 may determine that the leveling is correct when the specific supporter 200 whose pitch value is changed is rotated counterclockwise by 1/8 pitch.

FIG. 11 is a diagram illustrating converting an analog electric signal for a static load measured in a washing machine according to an embodiment of the present invention into a digital electric signal.

The load measuring supporter 210 converts the applied static load into an analog electric signal and outputs it to the load cell signal processing unit 330, and the amplifier 331 of the load cell signal processing unit 330 outputs the analog electric signal output by the load cell 215. The noise filter 333 removes noise from the amplified analog electric signal. At this time, the analog electric signal from which the noise is removed from the noise filter 333 is shown in FIG.

The digital filter 335 of the load cell signal processing unit 330 takes an average value of the analog electric signal with respect to the static load, removes noise, and converts it into a digital electric signal. At this time, the digital electric signal obtained by removing noise from the digital filter 335 is as shown in FIG. The digital filter 335 takes an average value of the analog electric signal as shown in FIG. 11A and converts it to a digital electric signal as shown in FIG.

12A to 12B are views illustrating various methods of displaying a leveling state in a washing machine according to an embodiment of the present invention.

As described above, the controller 350 calculates the leveling state and then displays the leveling state on the display unit 192 of the control panel 190.

If the control unit 350 determines that the leveling is correct when the specific supporter 200 whose pitch value is changed is rotated counterclockwise by 1/8 pitch, as shown in FIG. 12A by 1/8 counterclockwise The display 192 of the control panel 190 may be displayed to rotate the specific supporter 200.

According to an embodiment, as shown in FIG. 12B, the control unit 350 may display a load value applied to the supporter 200 on the display unit 192 of the control panel 190 to indicate which supporter 200 should be adjusted in height. have.

In addition, as shown in FIG. 12C, the load value applied to the supporter 200 according to the height of the specific supporter 200 may be displayed in a graph, and the reference load value and the measured load value may be displayed.

13 is a view showing the entire stroke of the washing machine according to an embodiment of the present invention.

The washing stroke 510 is a stroke for removing contamination from the cloth by rotating the drum 124 after wetting the laundry water mixed with the laundry detergent in the cloth. In the laundry method according to an embodiment of the present invention, the washing administration 510 proceeds in the order of water supply 511, washing 512, drainage 513, and simple dewatering 514.

When the washing administration 510 is started, the control unit 350 displays a washing icon on the progress display of the display unit 192 to indicate that the washing administration is started.

The water supply 511 supplies washing water into the tub 122 from an external water source. In the water supply 511, the washing water flows from the external water source to the detergent box 180. The washing water in the detergent box 180 is mixed with the laundry detergent and introduced into the tub 122. Washing water in the detergent box 180 may be mixed with bleach.

When the water supply 511, the washing machine mixed with the laundry detergent may be performed so that the control unit 350 rotates the drum 124 so that the washing water is evenly soaked in the cloth. The water supply 511 proceeds until the wash water fills up to the target water level, and the target water level is determined by the controller 350 according to the amount of cloth (hereinafter referred to as 'amount') or the selected course measured before the water supply 511. .

The water level of the wash water is preferably measured by a water level detection device (not shown). The dose can be measured in various ways. A method for measuring a dose will be described later with reference to FIG. 14.

When the wash water flows into the tub 122 to the target water level, the controller 350 finishes the water supply 511.

The laundry 512 rotates the drum 124 containing the cloth soaked with the washing water mixed with the laundry detergent. During washing 512, the control unit 350 rotates the drum 124 at various speeds or directions to apply mechanical force such as stretching force, friction force, and impact force to remove contamination of the cloth.

Steam may be injected into the drum 124 during the washing 512 according to the washing course or the user's choice. When washing 512, the control unit 350 may discharge the washing water from the tub 122 and then circulate the washing water into the drum 124.

The drain 513 discharges the washing water in the tub 122 to the outside of the cabinet 110. When the drain 514, the wash water in the tub 122 is discharged to the outside.

The simple dewatering 514 rotates the drum 124 at a high speed so that the wash water soaked in the cloth exits. If the control unit 350 rotates the drum 124 at a high speed during the simple dehydration 514, the control unit 350 is attached to the inner wall of the carriage drum 124 and rotated to dehydrate the cloth by centrifugal force. Since the simple dehydration 514 does not need to be dehydrated to the extent that the fabric is dried, the drum 124 is preferably rotated at 108 rpm, which is a speed sufficient to rotate against the inner wall of the carriage drum 124.

In the simple dewatering 514, the control unit 350 may discharge the washing water in the tub 122 to the outside.

The rinsing stroke 520 is a stroke for removing the residual laundry detergent of the fabric by rotating the drum 124 after wetting the wash water mixed with fabric softener. In the washing method according to an embodiment of the present invention, the rinsing stroke 520 is in the order of water supply 521, rinsing 522, drainage 523, simple dewatering 524, water supply 525, rinsing 526. Proceed. In this embodiment, the rinses 522 and 226 are repeated twice and may not be repeated or may be repeated several times, depending on the embodiment.

When the rinsing stroke 520 is started, the control unit 350 displays a rinsing icon on the progress display of the display unit 192 to indicate that the rinsing stroke is started.

The water supply 521 supplies washing water into the tub 122 from an external water source similarly to the water supply 511 of the washing stroke 510 described above. The fabric softener in the water supply 521 is not mixed with the wash water, but is mixed with the wash water in the last water supply 524 of the rinse stroke 520 to be described later. A foaming core in which the control unit 350 rotates the drum 124 may be performed so that the washing water is uniformly wetted with the cloth.

The rinse 522 is to rotate the drum 124 containing the cloth soaked with wash water. During the rinsing 522, the control unit 350 rotates the drum 124 at various speeds or directions to apply mechanical force such as stretching force, friction force, and impact force to remove residual laundry detergent and contamination of the cloth. In the rinsing 522, the control unit 350 may discharge the washing water from the tub 122, and then circulate the washing water into the drum 124.

The drain 523 discharges the washing water in the tub 122 to the outside of the cabinet 110, similarly to the drain 513 of the washing stroke 510 described above.

The simple dewatering 524 rotates the drum 124 at a high speed so that the washing water soaked in the cloth exits like the simple dewatering 514 of the washing stroke 510 described above.

The water supply 525 supplies washing water from the external water source into the tub 122 similarly to the water supply 521 described above in order to repeat the rinsing 526 again. Washing water in the water supply 525 is preferably mixed with the fabric softener in the detergent box 180 is introduced into the tub 122. When the water supply 525, the washing water mixed with the fabric softener may be performed so that the control unit 350 rotates the drum 124 so that the washing water is evenly soaked in the cloth.

The rinse 526 rotates the drum 124 in which the cloth is soaked with wash water, similar to the rinse 522 described above. However, the washing water mixed with the fabric softener during rinsing (526) acts on the fabric to soften the fabric.

The dehydration stroke 530 is a stroke for dewatering the gun by rotating the drum 124 at high speed. In the washing method according to an embodiment of the present invention, the dehydration stroke 530 includes drainage 531, podis dispersion 532 and main dewatering 533.

When the dehydration stroke 530 is started, the control unit 350 displays the dehydration icon on the progress display of the display unit 192 to indicate that the dehydration stroke is started.

The drain 531 discharges the washing water in the tub 122 to the outside of the cabinet 110, similarly to the drain 513 of the washing stroke 510 or the drain 523 of the rinsing stroke 520.

Foam dispersion 532 is a drum 124 to accelerate and slow down to disperse the cloth. When washing 512 or rinsing 522, entanglement of the cloth is caused by one-sided entanglement of the cloth. Such, the center of gravity (L) of the entire washing machine 100 is changed by the eccentricity of the cloth to generate noise and vibration during the high speed rotation of the drum (124). The eccentricity includes left and right eccentricity causing vibration in the left and right direction about the rotation axis R of the drum 124, and front and rear eccentricity causing vibration in the front and rear direction, which is the rotation axis R direction of the drum 124. Foam dispersion 532 disperses the fabric to resolve such left and right eccentricity and / or back and forth eccentricity.

The control unit 350 calculates the degree of eccentricity of the cloth during the foam dispersion 532 to accelerate or decelerate the drum 124 according to the degree of eccentricity of the cloth. That is, the controller 350 may adjust the acceleration to accelerate or decelerate the drum 124 according to the degree of eccentricity of the cloth. The controller 350 may stop the drum 124 when the eccentricity of the cloth is excessive. A method for measuring the degree of eccentricity of the fabric will be described later with reference to FIGS. 15 to 19.

The controller 350 repeats accelerating and decelerating the drum 124 according to the eccentricity of the cloth. The controller 350 continues to accelerate and decelerate the drum 124 when the degree of eccentricity of the gun is greater than or equal to the allowable value. If the acceleration and deceleration of the drum 124 is continuously repeated because the degree of eccentricity of the artillery is more than the allowable value, the control unit 350 may stop it. That is, when the acceleration and deceleration of the drum 124 continues to be repeated more than the allowed number of times, it is preferable that the controller 350 stops the drum 124 after notifying that the display unit 192 has an error. If the degree of eccentricity of the gun is within the allowable value, the controller 350 stops the gun dispersion 532 and performs main dehydration 533.

In the present embodiment, the podis dispersion 532 has been described as being performed before the main dewatering 533, but before the simple dewatering 514 of the washing stroke 510 or the simple dewatering 524 of the rinsing stroke 520 according to the embodiment. Can be performed.

The main dewatering 533 rotates the drum 124 at a high speed so that the washing water soaked in the cloth exits. If the control unit 350 rotates the drum 124 at a high speed during the main dewatering 533, the control unit 350 is attached to the inner wall of the carriage drum 124 and rotated to dehydrate the cloth by centrifugal force. The drum 124 may rotate at a speed of 1000 rpm or more, which is faster than the simple dewatering 514 of the washing stroke 510 or the simple dewatering 524 of the rinsing stroke 520.

In the main dewatering 533, the control unit 350 may discharge the washing water in the tub 122 to the outside of the cabinet 110. After the main dewatering 533, drying may be performed by supplying hot air into the drum 124 to dry the fabric.

14 is a flowchart illustrating a method of measuring a quantity of laundry in a laundry method according to an embodiment of the present invention.

The amount of the gun is measured by the static load applied to the entire supporter 200 as the weight of the gun contained in the drum 124. Since the static load applied to the entire supporter 200 in a state in which the carriage is not accommodated in the drum 124 is determined, measuring the static load applied to the entire supporter 200 in the state in which the carriage is accommodated in the drum 124 may measure the quantity. can do.

It is sufficient to measure the load applied to the supporter 200 disposed at the two corners of the bottom of the cabinet 110, which is substantially rectangular, in the state in which the carriage is accommodated in the drum 124. Do. That is, among the supporters 200a disposed at the front left side of the washing machine 100, the supporters 200b disposed at the rear left side, the supporters 200c disposed at the rear right side, and the supporters 200d disposed at the front right side of the washing machine 100. When the load applied to any two supporters 200 is measured, the load applied to the entire supporter 200 may be measured. When the center of gravity of the cloth is somewhat coincident with the center of gravity (L) of the washing machine 100, the load increased by the amount of the gun is because the load applied to the supporter 200 disposed at each corner increases on average . Therefore, by measuring the load applied to the supporter 200 disposed at the two corners and summing them up, the load applied to the entire supporter 200 can be roughly calculated.

The load applied to the supporter 200 disposed at two adjacent corners of the bottom of the cabinet 110, which is preferably substantially rectangular, is measured, and in particular, the supporter 200 disposed in the direction of the rotation axis R of the drum 124. Measure the load applied to the

An error may occur when the load applied to the supporter 200 disposed at two corners spaced diagonally from the bottom of the substantially rectangular cabinet 110 is measured. As described above, when the leveling is not properly performed or when a person or an object is placed on the floor near any one of the supporters 200, when the load applied to the one supporter 200 increases by a, the supporters disposed in the diagonal direction ( This is because the load applied to 200 also increases by a. That is, when m1 '= m1 + a, m3' = m3 + a becomes m1 '+ m3' = m1 + m3 = 2a. Therefore, if you double this, the total load will be an error of 4a. However, when m1 '= m1 + a, m2' = m2-a, so m1 '+ m2' = m1 + m2. Therefore, even if this is doubled, no error occurs.

An error may occur when a load applied to two supporters 200 disposed in a direction perpendicular to the direction of the rotation axis R of the drum 124 is measured. The supporter disposed in the front when the carriage centered on the drum 124 is moved forward or rearward in the direction of the rotation axis R of the drum 124 so that the center of gravity of the gun is greatly shifted from the center of gravity L of the washing machine 100 in the front-rear direction. An error occurs because the load due to the amount of force is directed to the supporters 200b and 200c disposed at the rear sides 200a and 200d.

When the drum 124 is driven left or right around the rotational axis R of the carriage drum 124, when the drum 124 is rotated and stopped, the rotational axis R of the carriage drum 124 in the drum 124 is stopped. On a parallel line. Since the center of gravity of the fabric does not deviate greatly from the center of gravity (L) of the washing machine 100 in the left and right directions, the load due to the amount of load is supported by the supporters 200a and 200b disposed on the left side or the supporters 200c and 200d disposed on the right side. Do not.

Therefore, it is preferable to measure the load applied to the supporter 200 disposed adjacent to the rotation axis R direction of the drum 124. That is, the supporter 200a disposed at the front left side and the supporter 200b disposed at the rear left side are the load measuring supporter 210 or the supporter 200d disposed at the front right side and the supporter 200c disposed at the rear right side. Is preferably the load measuring supporter 210. In the present embodiment, when the supporter 200d disposed on the front right side and the supporter 200c disposed on the rear right side are the load measuring supporter 210, the total load is 2 * (m3 +) in the state where the cloth is accommodated in the drum 124. m4). Also in this case, it is preferable that the center of gravity L of the washing machine 100 is close to the rotational axis R of the drum 124, that is, x1 × x2.

A method for measuring a dose according to an embodiment of the present invention is as follows.

The drum 124 is rotated at constant speed (S610). When the washing stroke 510 is started, the controller 350 accelerates the drum 124 before the water supply 511 and rotates the drum 124 at a constant speed for a predetermined time, and then stops the drum 124. When the drum 124 stops after rotating at a constant speed for a predetermined time, the carriage in the drum 124 collects in parallel with the rotation axis R of the drum 124.

After the drum 124 stops, the static load is measured for a predetermined time (S620). The load measuring supporter 210 disposed at two corners of the bottom of the substantially rectangular cabinet 110 measures the load applied for a predetermined time. The load measuring supporter 210 includes a supporter 200a disposed at the front left side of the washing machine 100, a supporter 200b disposed at the rear left side, a supporter 200c disposed at the rear right side, and disposed at the front right side. It may be any two of the supporters 200d, and the rest of them are the general supporter 220. Preferably, the load measuring supporter 210 is two supporters 200 disposed adjacent to each other in the direction of the rotation axis R of the drum 124.

The load measured by the two load measuring supporters 210 corresponds to a static load in which the measured value does not change significantly since the load is measured while the drum 124 of the washing machine 100 does not rotate. The static load applied by the load cell 215 of the load measuring supporter 210 is converted into an analog electric signal and output to the load cell signal processing unit 330.

The measured static load is filtered (S630). The load cell signal processor 330 filters the analog electrical signal output by the load cell 215 of the load measuring supporter 210. The amplifier 331 of the load cell signal processor 330 amplifies the analog electrical signal output from the load cell 215, the noise filter 333 removes noise from the amplified analog electrical signal, and the digital filter 335 noise The noise is removed by converting the removed analog electric signal into a digital electric signal. According to an embodiment, the amplifier 331 and / or the noise filter 333 may be excluded.

The amplifier 331 receives the analog electric signal output from the load cell 215 from the power supply unit 310, converts the analog electric signal into a voltage level at which digital change is possible, and amplifies it.

The noise filter 333 may be implemented in various forms to remove noise from the electrical signal amplified by the amplifier 331. In this embodiment, the noise filter 333 is a low pass filter that removes high frequency components above a specific frequency. .

The digital filter 335 removes noise of the analog electric signal and converts the digital electric signal. The digital filter 335 removes noise by taking an average value of the analog electric signal with respect to the static load and converts it into a digital electric signal. Detailed description thereof has been described above with reference to FIG. 11.

Calculate the amount (S640). The controller 350 calculates a dose based on the static load value from which the noise is removed from the load cell signal processor 330 and converted into a digital electric signal. The control unit 350 calculates the load applied to the entire supporter 200 by doubling the sum of the load values measured by the two load measuring supporters 210, and then takes the carriage from the load values applied to the entire supporter 200. In the state not accommodated in the drum 124, the amount of load is calculated by subtracting the load value applied to the entire supporter 200.

In this embodiment, the supporter 200d disposed at the front right side and the supporter 200c disposed at the rear right side are the load measuring supporter 210 and are applied to the entire supporter 200 in a state in which it is not accommodated in the carriage drum 124. If the load value to be M is, the quantity is 2 * (m3 + m4)-M.

15 is a view showing a rotational speed change of the drum during dehydration operation according to an embodiment of the present invention.

C1 is a section that measures the degree of eccentricity of the gun at low speed. While rotating the drum 124 at a low speed of less than 150 rpm, the degree of eccentricity of the cloth is measured through the change in the dynamic load applied to the supporter 200. A method for measuring the degree of eccentricity of the fabric will be described later with reference to FIGS. 15 to 19.

C2 is a section in which povariance is performed. Foam dispersion repeats accelerating and decelerating drum 124. The controller 350 continues to accelerate and decelerate the drum 124 when the degree of eccentricity of the gun is greater than or equal to the allowable value.

C3 is a section for measuring the eccentricity of the gun at high speed. While rotating the drum 124 at a high speed of 150 rpm or more, the degree of eccentricity of the cloth is measured through the change of the dynamic load applied to the supporter 200. A method for measuring the degree of eccentricity of the fabric will be described later with reference to FIGS. 15 to 19.

C4 is a section for measuring whether resonance occurs during acceleration at high speed. While accelerating the drum 124 to 150 rpm or more is measured whether the resonance occurs through the change in the dynamic load applied to the supporter 200. A method of measuring whether resonance occurs will be described later with reference to FIG. 20.

16 is a flowchart illustrating a method for measuring the degree of eccentricity of the cloth in the laundry method according to an embodiment of the present invention.

The eccentricity of the cloth is measured through the change in the dynamic load applied to the supporter 200 while the drum 124 rotates. Measuring the dynamic load applied to the supporter 200 is sufficient to measure the load applied to the supporter 200 disposed at the two corners of the bottom of the substantially rectangular cabinet 110. That is, among the supporters 200a disposed at the front left side of the washing machine 100, the supporters 200b disposed at the rear left side, the supporters 200c disposed at the rear right side, and the supporters 200d disposed at the front right side of the washing machine 100. The load applied to any two supporters 200 is measured. Preferably, the dynamic load applied to the two supporters 200 disposed adjacent to each other in the direction of the rotation axis R of the drum 124 at the bottom of the substantially rectangular cabinet 110 is measured.

Method for measuring the degree of eccentricity of the fabric according to an embodiment of the present invention is as follows.

By accelerating the drum 124 (S710), the drum 124 is rotated at constant speed (S720). The controller 350 accelerates the drum 124 to rotate at a constant speed.

The speed of the drum 124 is about 60 to 150 rpm in the C1 section of FIG. 15 measuring the eccentricity of the fabric at low speed, and about 150 to 400 rpm in the C3 section of FIG. 15 measuring the eccentricity of the fabric at high speed. to be.

The drum 124 rotates at a constant speed and measures a dynamic load for a predetermined time (S730). The load measuring supporter 210 disposed at two corners of the bottom of the substantially rectangular cabinet 110 measures the dynamic load applied for a predetermined time. The load measuring supporter 210 includes a supporter 200a disposed at the front left side of the washing machine 100, a supporter 200b disposed at the rear left side, a supporter 200c disposed at the rear right side, and disposed at the front right side. It may be any two of the supporters 200d, and the rest of them are the general supporter 220. Preferably, the load measuring supporter 210 is two supporters 200 disposed adjacent to each other in the direction of the rotation axis R of the drum 124.

The load measured by the two load measuring supporters 210 corresponds to a dynamic load in which the measured value changes since the load measured by the drum 124 of the washing machine 100 is rotated. The dynamic load applied by the load cell 215 of the load measuring supporter 210 is converted into an analog electric signal and output to the load cell signal processing unit 330.

The measured dynamic load is filtered (S740). The load cell signal processor 330 filters the analog electrical signal output by the load cell 215 of the load measuring supporter 210. The amplifier 331 of the load cell signal processor 330 amplifies the analog electrical signal output from the load cell 215, the noise filter 333 removes noise from the amplified analog electrical signal, and the digital filter 335 noise The noise is removed by converting the removed analog electric signal into a digital electric signal. According to an embodiment, the amplifier 331 and / or the noise filter 333 may be excluded.

The amplifier 331 receives the analog electric signal output from the load cell 215 from the power supply unit 310, converts the analog electric signal into a voltage level at which digital change is possible, and amplifies it.

The noise filter 333 may be implemented in various forms to remove noise from the electrical signal amplified by the amplifier 331. In this embodiment, the noise filter 333 is a low pass filter that removes high frequency components above a specific frequency. .

The digital filter 335 removes noise of the analog electric signal and converts the digital electric signal. The digital filter 335 performs a first-order integration on the analog electric signal with respect to the dynamic load and converts it into a digital electric signal. Detailed description thereof will be described later with reference to FIG. 17.

The degree of eccentricity of the gun is calculated (S750). The control unit 350 calculates the degree of eccentricity of the fabric on the basis of the dynamic load value, from which the noise is removed from the load cell signal processing unit 330 and converted into a digital electric signal. The calculation method for the eccentricity of the fabric will be described later with reference to FIGS. 18 and 19.

It is determined whether the gun is eccentric (S760). The controller 350 determines whether the eccentricity of the gun is higher than the allowable value.

If the degree of eccentricity of the gun is larger than the allowable value, the gun dispersion 532 is performed (S770). The control unit 350 repeats the acceleration and deceleration of the drum 124 at the time of the dispersion 532. The controller 350 may stop the drum 124 when the eccentricity of the cloth is excessive. If the acceleration and deceleration of the drum 124 is continuously repeated because the degree of eccentricity of the artillery is more than the allowable value, the control unit 350 may stop it. That is, when the acceleration and deceleration of the drum 124 continues to be repeated more than the allowed number of times, it is preferable that the controller 350 stops the drum 124 after notifying that the display unit 192 has an error.

If the eccentricity of the gun is less than the allowable value, the drum is accelerated to perform dehydration (S780).

FIG. 17 is a diagram illustrating converting an analog electric signal for a dynamic load measured in a washing machine into a digital electric signal according to an embodiment of the present invention.

The load measuring supporter 210 converts the applied dynamic load into an analog electric signal and outputs it to the load cell signal processing unit 330, and the amplifier 331 of the load cell signal processing unit 330 outputs the analog electric signal output by the load cell 215. The noise filter 333 removes noise from the amplified analog electric signal. At this time, the analog electric signal from which the noise is removed from the noise filter 333 is as shown in FIG.

The digital filter 335 of the load cell signal processor 330 removes noise by performing first-order integration on the dynamic load and converts the digital signal into a digital electric signal. The digital filter 335 converts the analog electric signal with respect to the dynamic load into a digital electric signal by time integration. At this time, the digital electric signal converted by removing the noise from the digital filter 335 is as shown in FIG. 17B. However, when the drum 124 rotates at a high speed of 150 rpm or more, separate noise before the first integration. Removal is required and the description thereof will be described later with reference to FIG. 21.

18 is a diagram illustrating a method of measuring left and right eccentricity in a washing machine according to an embodiment of the present invention.

The left and right eccentricity causes vibration in the left and right direction about the rotation axis R of the drum 124, and is calculated from the amplitude of the change amount of the load applied to the supporter 200.

In the present embodiment, the load measuring supporter 210 is a case of the supporter 200c disposed at the rear right side and the supporter 200d disposed at the front right side. Referring to FIG. 18, the change in the load measured in the supporter 200c disposed at the rear right side is the same as the left side, and the change in the load measured in the supporter 200d disposed at the front right side is the same as the right side.

The controller 350 controls the amplitude A1 which is the magnitude of the difference between the maximum value and the minimum value of the change amount of the load measured by the supporter 200c disposed on the rear right side, and the load measured by the supporter 200d disposed on the front right side. The magnitude of the left and right eccentricity is calculated by adding the amplitude A2, which is the magnitude of the difference between the maximum value and the minimum value of the change amount.

The greater the sum of the amplitude A1 of the change amount of the load applied to the supporter 200c disposed on the rear right side and the amplitude A2 of the change amount of the load applied to the supporter 200d disposed on the front right side, the greater the left and right eccentricity. It is big. Accordingly, the control unit 350 adds the amplitude A1 of the change amount of the load applied to the supporter 200c disposed on the rear right side and the amplitude A2 of the change amount of the load applied to the supporter 200d disposed on the front right side. The left and right eccentricity of the gun is judged according to whether the value is within the allowable value.

According to an embodiment, the control unit 350 sums the load value measured at the supporter 200c disposed at the rear right side and the load value measured at the supporter 200d disposed at the front right side, and then the maximum value and the minimum value thereof are different. The amplitude of, can determine the eccentricity of the gun. When a person or an object is placed on the floor on which the washing machine 100 is installed, the load value measured by the supporter 200 is changed. Errors can occur depending on the environment of these floors. When the load value measured in the supporter 200 changes according to the environment of the bottom surface, and m3 '= m3 + a becomes m4' = m4-a, m3 '+ m4' = m3 + m4, and two supporters ( If you add the loads measured in 200), no error occurs. Therefore, the control unit (A) is an amplitude in which the maximum value and the minimum value for the change amount of the sum of the load value measured at the supporter 200c disposed at the rear right side and the load value measured at the supporter 200d disposed at the front right side are the magnitude of the difference. It is desirable to judge the left and right eccentricity of the fabric depending on whether it is within the allowable value.

19 is a view illustrating a method for measuring the degree of front and rear eccentricity in a washing machine according to an embodiment of the present invention.

The front-back eccentric causes vibration in the front-back direction, which is the direction of the rotation axis R of the drum 124, and is calculated from the phase difference with respect to the amount of change of the load applied to the different supporters 200.

In the present embodiment, the load measuring supporter 210 is a case of the supporter 200c disposed at the rear right side and the supporter 200d disposed at the front right side. Referring to FIG. 19, a phase difference occurs in a change in the load measured by the supporter 200c disposed at the rear right side and a change in the load measured by the supporter 200d disposed at the front right side.

The control unit 350 calculates the degree of front and rear eccentricity from the phase difference P between the change amount of the load measured by the supporter 200c disposed on the rear right side and the change amount of the load measured by the supporter 200d disposed on the front right side.

The greater the phase difference P between the amount of change of the load applied to the supporter 200c disposed on the rear right side and the amount of change of the load applied to the supporter 200d disposed on the front right side, the larger the left and right eccentricity. The control unit 350 determines the degree of eccentricity before and after the cloth according to whether the phase difference P of the load change amount is within an allowable value.

If the phase difference P of the change amount of the load is 0 degrees, there is no front and rear eccentricity, and if it is 180 degrees, the front and rear eccentricity is the maximum. According to the embodiment, the allowable value of the phase difference P of the load change amount may be determined. In the present embodiment, the control unit 350 may have a front and rear eccentricity when the phase difference P of the load change amount is 90 degrees or more and less than 270 degrees. You can judge.

The phase difference P of the amount of change in the load may also change depending on the environment of the floor surface described above. Therefore, the control unit 350 is a supporter in which a maximum value for a change amount obtained by adding the load value measured at the supporter 200c disposed at the rear right side and the load value measured at the supporter 200d disposed at the front right side is disposed at the rear right side. When the maximum value of the change amount of the load measured at 200c or the maximum value of the change amount of the load measured at the supporter 200d disposed on the front right side is larger than the maximum value, it is preferable to calculate the phase difference P. In addition, the control unit 350 is a supporter in which a minimum value for the change amount of the sum of the load value measured at the supporter 200c disposed at the rear right side and the load value measured at the supporter 200d disposed at the front right side is disposed at the rear right side ( If it is smaller than the minimum value of the change amount of the load measured in 200c) or the minimum change amount of the load measured in the supporter 200d disposed on the front right side, it is preferable to calculate this and calculate the phase difference P.

20 is a flowchart illustrating a resonance avoiding method according to an embodiment of the present invention.

Vibration generated when the drum 124 rotates, especially when the drum 124 rotates at a high speed for a long time during dehydration, when the vibration resonates with the bottom surface on which the washing machine is placed, a large vibration occurs in the washing machine 100. And loud noise is caused. This resonance occurs when the natural frequency of the floor and the frequency of the washing machine 100 coincide with each other or become a drainage relationship, and the frequency of the washing machine 100 is changed according to the speed of the drum 124. Therefore, it occurs mainly in the process of main dehydration 533 in which the speed of the drum 124 changes greatly.

The drum 124 is accelerated (S810). The controller 350 accelerates the drum 124 for the purpose of dehydration.

When the drum 124 is accelerated, the dynamic load is measured for a predetermined time (S820). The load measuring supporter 210 disposed at two corners of the bottom of the substantially rectangular cabinet 110 measures the dynamic load applied for a predetermined time. The load measuring supporter 210 includes a supporter 200a disposed at the front left side of the washing machine 100, a supporter 200b disposed at the rear left side, a supporter 200c disposed at the rear right side, and disposed at the front right side. It may be any two of the supporters 200d, and the rest of them are the general supporter 220. Preferably, the load measuring supporter 210 is two supporters 200 disposed adjacent to each other in the direction of the rotation axis R of the drum 124.

The load measured by the two load measuring supporters 210 corresponds to a dynamic load in which the measured value changes since the load measured by the drum 124 of the washing machine 100 is rotated. The dynamic load applied by the load cell 215 of the load measuring supporter 210 is converted into an analog electric signal and output to the load cell signal processing unit 330.

The measured dynamic load is filtered (S830). The load cell signal processor 330 filters the analog electrical signal output by the load cell 215 of the load measuring supporter 210. The amplifier 331 of the load cell signal processor 330 amplifies the analog electrical signal output from the load cell 215, the noise filter 333 removes noise from the amplified analog electrical signal, and the digital filter 335 noise The noise is removed by converting the removed analog electric signal into a digital electric signal. According to an embodiment, the amplifier 331 and / or the noise filter 333 may be excluded.

The amplifier 331 receives the analog electric signal output from the load cell 215 from the power supply unit 310, converts the analog electric signal into a voltage level at which digital change is possible, and amplifies it.

The noise filter 333 may be implemented in various forms to remove noise from the electrical signal amplified by the amplifier 331. In this embodiment, the noise filter 333 is a low pass filter that removes high frequency components above a specific frequency. .

The digital filter 335 removes noise of the analog electric signal and converts the digital electric signal. The digital filter 335 performs a first-order integration on the analog electric signal with respect to the dynamic load and converts it into a digital electric signal. Detailed description thereof has been described above with reference to FIG. 17.

The resonance degree is calculated (S840). The resonance is very similar to calculating the eccentricity of the gun. In the present embodiment, when the load measuring supporter 210 is the supporter 200c disposed on the rear right side and the supporter 200d disposed on the front right side, the control unit 350 is applied to the supporter 200c disposed on the rear right side. The degree of resonance is judged according to whether the sum of the amplitude A1 of the change amount of the load and the amplitude A2 of the change amount of the load applied to the supporter 200d disposed on the front right side is within the allowable value. In addition, the controller 350 determines the degree of resonance according to whether the phase difference P of the load change amounts of the two load measuring supporters 210 is within an allowable value.

It is determined whether resonance has occurred (S850). The controller 350 determines whether the resonance degree is higher than the allowable value.

If it is determined that the resonance is greater than the allowable resonance level, resonance avoidance is performed (S860). Since resonance occurs when the natural frequency of the bottom surface and the frequency of the washing machine 100 coincide with each other or become a drainage relationship, the resonance is avoided by changing the speed of the drum 124 to change the frequency of the washing machine 100. Therefore, the controller 35 lowers or raises the speed of the drum 124 by a predetermined amount in order to avoid resonance. According to an embodiment, the controller may stop the drum 124.

21 is a view showing a filter for the dynamic load measured at high speed in the washing machine according to an embodiment of the present invention.

An analog electrical signal in which the noise is removed from the noise filter 333 with respect to the measured dynamic load by rotating the drum 124 at high speed is shown in FIG. FIG. 21B shows the noise of the analog electric signal with respect to the static load measured when the drum 124 is stopped. The noise is removed by subtracting the noise of the analog electric signal with respect to the static load of FIG. 21 (b) from the analog electric signal with respect to the dynamic load of FIG.

Although the above-described embodiment is limited to a drum type washing machine, the technical idea of the present invention may be applied to a stirring washing machine or a vortex washing machine, and may be applied to a device for processing other laundry such as a washing machine and a dryer.

Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (11)

Cabinet with square bottom;
A drum disposed in the cabinet to accommodate the cloth;
A load measuring supporter disposed at two corners of the bottom of the cabinet to support the cabinet and measure a load;
And a control unit for measuring the amount of cloth contained in the drum according to the load measured by the load measuring supporter. The method of claim 1,
The load measuring supporter is disposed in two adjacent corners of the bottom of the cabinet. The method of claim 2,
The load measuring supporter is disposed in the rotation axis direction of the drum. The method of claim 1,
The control unit is a washing machine that doubles the load measured by the load measuring supporter when the cloth is accommodated in the drum and doubles the amount of the washing machine. The method of claim 1,
The load measuring supporter,
A load cell coupled to the cabinet at one side thereof to convert an applied load into an analog electric signal and output the analog signal; And
And a load cell leg coupled to the other side of the load cell and supporting the cabinet from a bottom surface thereof. The method of claim 5, wherein
The load cell is a washing machine in which a hole is formed in the center. The method of claim 1,
And a load cell signal processing unit for converting the analog electrical signal output by the load measuring supporter into a digital electrical signal and removing noise. The method of claim 7, wherein
The load cell signal processor,
An amplifier for amplifying the analog electrical signal output from the load cell;
A noise filter for removing noise from the analog electrical signal amplified by the amplifier; And
And a digital filter converting the analog electric signal from which the noise is removed from the noise filter into a digital electric signal and removing the noise. The method of claim 8,
And the digital filter takes an average value with respect to the analog electric signal. Measuring a load by a load measuring supporter disposed at two corners of the bottom of the cabinet and supporting the cabinet; And
And measuring the amount of cloth contained in the drum by the load measured by the load measuring supporter. 11. The method of claim 10,
The method of measuring the amount of washing is the washing method of doubling and then measure the sum of the load measured by the load measuring supporter.

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