KR20060004364A - Installation for detecting vibration using damper of drum type washing machine - Google Patents

Abstract

Disclosed is a vibration sensing device using a damper of a drum washing machine.

According to the present invention, by connecting the upper side of the piston constituting the damper and the upper side of the cylinder for accommodating the piston link unit for converting the linear movement of the piston to rotational movement; A potentiometer for varying the resistance in response to the rotational movement of the link member; And a microcomputer for controlling the RPM of the drum motor after recognizing the vibration state of the drum washing machine in proportion to the variable resistance value detected from the potentiometer.

Therefore, the present invention is installed between the piston and the cylinder constituting the damper to form a link member for converting the linear motion of the piston into a rotary motion, and in conjunction with the link member to output a variable voltage according to the rotational motion of the link member By mounting a potentiometer for the drum washing machine, it is possible to directly detect the vibration state according to the amount of eccentricity of the drum washing machine, thereby providing an effect of more precisely controlling the RPM motor of the drum motor for preventing the drum washing machine from being eccentric. .

Drum Washing Machine, Drum Motor, Potentiometer, Link, Crank, Voltage Difference, Vibration, Eccentricity

Description

Vibration sensing device using damper of drum washing machine {INSTALLATION FOR DETECTING VIBRATION USING DAMPER OF DRUM TYPE WASHING MACHINE}

1 is a view showing the main configuration of a conventional drum washing machine.

2 is a perspective view showing a vibration sensing device according to the present invention.

3 is an exploded perspective view of FIG. 2.

4 is a view for explaining the operation of FIG.

5 is a configuration diagram illustrating the control device of FIG. 2.

<Explanation of symbols for main drawings>

200: damper 201: cylinder

203: piston 205: arm

207: potentiometer 209: crank

211: fixing member 501: AD converter

503: control unit 505: memory

507: driver

The present invention relates to a vibration washing device of a drum washing machine, and more particularly, to a vibration using a damper of a drum washing machine to recognize the vibration state of the water tank according to the amount of eccentricity of the drum during the dehydration operation of the drum washing machine by using the vertical movement of the damper. It relates to a sensing device.

In general, the drum washing machine is configured to rotate the cylindrical drum from the inside of the washing tank, and to wash by dropping the laundry from the drum top to the bottom in such a process, the damage of the laundry or the amount of wash water is used in the pulsator type It is relatively small compared to a washing machine. On the other hand, the drum washing machine twists the laundry due to the falling of the laundry, and the twisting of the laundry causes an eccentricity when the washing tub is rotated in the same manner as the washing machine of the pulsator type.

Therefore, a drum washing machine has also been developed to prevent the eccentricity, the application number "10-1996-000180, the name of the invention: anti-eccentric dehydration method and apparatus of the drum washing machine" using a Hall sensor (Hole Sensor) After detecting the eccentricity of the drum washing machine, a dehydration method of a predetermined pattern is implemented according to the detection result. That is, the dehydration method for preventing the eccentricity of the drum washing machine continuously detects the rotational speed of the drum through the hall sensor of the motor during dehydration after washing and rinsing, and detects a section in which the rotational speed of the drum is small for a predetermined time. Detecting the eccentricity based on the rotational speed of the drum motor detected through the Hall sensor while accelerating the rotational speed of the drum at the embedding speed; and rotating at a high speed when the eccentricity detected in the step is small. In case of dehydration and large eccentricity, the feedback process is returned to the initial stage.

As shown in FIG. 1, the drum washing machine is provided with a water storage tank 111 horizontally from the inside of the trauma 110 shown as a virtual line, and a drum 112 having a function of a washing tank is rotatable therein. It is installed so as to, is installed close to the outer peripheral surface of the reservoir 111 is provided with a Hall sensor 123 for recognizing the vibration state of the drum (112). In addition, the lower portion of the reservoir 111, the drive motor 113, etc. for rotating the drum 111 is installed, the upper portion of the reservoir 111 is provided with a water supply port 114 for washing water supplied from the outside. A part of the water supply port 114 is supplied to the inside of the water tank 111 via the detergent container 115, and the filter 116 and the drain pump 117 so that the wash water is discharged to the bottom of the water tank 111. And the drain hose 118 are respectively connected, and the door 119 is installed at the front of the drum 112.

In addition, the drum washing machine having the structure as described above is between the cabinet top and the reservoir 111 in order to absorb the vibration and shock caused by the rotation and stop of the drum 112 or the fall of the laundry during the washing and dehydration process. The tension coil spring is coupled to each other, and the oil damper 120 is connected between the lower part of the cabinet and the reservoir 111 so that the suspension device including the damping action of the oil damper 120 and the tension coil spring is provided. .

On the other hand, looking at the operation of the drum washing machine according to the above configuration, first open the door 119, put the laundry in the drum 120, and then set the desired washing mode using the controller. When the drum washing machine is driven using the controller, water is supplied to the drum 120 through the water supply port 114, and the drum 120 is rotated in the left and right directions by driving the drum motor 113. The laundry is pulled up and down and washed. When washing and draining, the drain pump 117 is driven so that the water used for washing is discharged to the outside through the drain hose 118, the drain pump 117 and the drain.

When the series of washing cycles is completed, water is supplied again, and a rinsing stroke similar to the washing stroke is performed. Then, the drum 112 is rotated at a high speed to dehydrate the laundry by centrifugal force. On the other hand, when the laundry introduced into the drum 112 is eccentric in such washing and dehydrating strokes, severe vibrations are caused during rotation of the drum 112. In addition, the vibration of the rotation of the drum 112 due to the eccentricity of the laundry is transmitted to the oil damper 120 and the tension coil spring, and the vibration state of the hall sensor 123 is recognized. That is, the microcomputer (not shown) receives the signal waveform provided from the hall sensor 123 and infers the amount of eccentricity of the gun. Based on this, the microcomputer of the drum 112 responds to the preset dehydration stroke. Perform rotation control (RPM control).

As a result, the rotation control of the drum 112 is performed based on the output signal of the hall sensor 123. As the mounting position of the hall sensor 123 is installed close to the water reservoir 111, the hall sensor 123 ) And the setting of the separation distance between the reservoir 111 is a very important parameter. That is, when the separation distance between the reservoir 111 and the hall sensor 123 is wide, there is a problem that the detection signal of the hall sensor 123 is weak, while the separation distance between the reservoir 111 and the hall sensor 123 is narrow. In this case, the vibration range of the reservoir 111 detectable from the hall sensor 123 is narrowed, which causes a problem that the reliability of the detection signal is lowered.

The present invention was created to solve the above problems, the object of the present invention by setting the vertical motion of the damper mounted in the reservoir of the drum washing machine to the vibration coefficient, so that the drum washing machine to recognize the actual vibration state of the reservoir The present invention provides a vibration sensing device using a damper.

Another object of the present invention is to detect the up and down momentum of the damper, the flow displacement of the piston is measured through a potentiometer fixed to the position close to the damper, and the rotational amount of the drum washing machine according to the measurement result of the potentiometer It is to provide a vibration sensing device using a damper of the drum washing machine to reduce the noise and vibration during dehydration administration to control.

Vibration sensing device using the damper of the drum washing machine according to the aspect of the present invention for achieving the above object, vibration of the drum washing machine for detecting the vibration of the drum washing machine, and control the RPM of the drum motor according to the detection result A sensing device, comprising: a link member for converting a linear movement of a piston into a rotational movement by connecting an upper side of a piston constituting a damper and an upper side of a cylinder for accommodating the piston; A potentiometer for varying the resistance in response to the rotational movement of the link member; And after recognizing the vibration state of the drum washing machine in proportion to the variable resistance detected from the potentiometer, characterized in that it comprises a micom for controlling the RPM (RPM) of the drum motor.

According to a preferred embodiment of the present invention, the microcomputer is an ADC for converting and outputting the voltage change detected from the potentiometer to a digital signal, and the RPM of the drum motor in response to the voltage difference change of the potentiometer Extracts the maximum voltage and the minimum voltage based on a memory storing voltage difference RPM information for calculating the voltage difference) and the output data of the AD converter, calculates a voltage difference between the maximum voltage and the minimum voltage, A control unit for generating a drum motor control signal corresponding to the ALPM information after extracting the ALMP information of the corresponding drum motor from the memory, and adjusting the ALPM of the drum motor in response to the drum motor control signal provided from the control unit; It is characterized by consisting of a driver for.

In addition, the link member is fastened so as to be rotatable between the fixed member for installing the potentiometer spaced apart from the cylinder by a predetermined distance, the potentiometer and the cylinder spaced apart through the fixing member, and in response to the rotation angle And a crank for rotating the arm and an arm interlocked with the piston and for rotating the crank through a linear movement of the piston.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 2 is a view showing a damper of a drum washing machine according to the present invention.

As shown in the drawing, the upper side of the piston 203 constituting the damper 200 and the upper side of the cylinder 201 for accommodating the piston 203 are connected to convert the linear movement of the piston 203 into rotational movement. A link member for performing; Potentiometer (207) for varying the resistance value in response to the rotational movement of the link member. The link member may include a fixing member 211 for installing the potentiometer 207 spaced apart from the cylinder 201 by a predetermined distance, and a potentiometer 207 and a cylinder 201 spaced apart from the fixing member 211. Crank 209 for rotating the potentiometer 207 in response to the angle of rotation, and the piston 203 and the crank (203) through a linear movement of the piston 203 209 and arm 205 for pivoting.

3 is an exploded perspective view of the damper 200 according to the present invention. As shown, after fixing the piston fastening ring 301 for fixing the piston 203 and the arm 205, one side of the crank 209 and the rotation shaft of the potentiometer 207, the A damper fastening ring 309 for fixing the other side of the crank 209 to the cylinder 201, and a fixing frame 313 for fastening the damper fastening ring 309 and the potentiometer 207. In addition, the fixed frame 313 and the potentiometer 207 has respective fixing grooves 315 and 319, and the piston fastening ring 301 has a rotating groove 303 for rotating the arm 205. The damper coupling ring 309 forms a crank connecting groove 311 for pivotally coupling the crank 209.

In the damper 200 configured as described above, the piston fastening ring 301 is forcibly fitted to the upper portion of the piston 203, and then the arm 205 is fastened to the pivot groove 303 through the pivot pin 305. . Accordingly, the arm 205 is pivotable about the pivoting groove 303 and is fastened to the lower end of the arm 205 such that the crank 209 is pivotable. In addition, one side of the crank 209 is fitted to interlock with the rotation shaft of the potentiometer 207.

On the other hand, the damper fastening ring 309 is forcibly fitted to the upper portion of the cylinder 201, the crank connecting groove 311 of the damper fastening ring 309 is fitted with the other side of the crank 209 is rotated Make it possible. In addition, the fixing groove 319 formed on the connection panel 317 of the potentiometer 207 is fixedly coupled to each of the fixing groove 315 of the fixing frame 313 through a predetermined fastening member. Therefore, the vertical flow of the piston 203 causes the arm 205 to move up and down linearly, and rotates the crank 209 fastened to the lower end of the arm 205 to a predetermined range. The rotation of the crank 209 rotates the rotation shaft of the potentiometer 207 fixedly coupled to the cylinder 201. As a result, the rotation range of the potentiometer 207 is determined in proportion to the flow range of the piston 203 and induces a change in resistance value corresponding to the rotation range of the potentiometer 207.

That is, as shown in Figure 4, the potentiometer 207 is rotated by a predetermined angle by the arm 205 in accordance with the up and down linear movement of the piston 203, the resistance value corresponding to the rotation angle of the potentiometer 207 Change is made. Here, the potentiometer 207 has a variable resistor connected in series with a fixed resistor, the variable resistor is variable corresponding to the amount of rotation of the crank 209, the predetermined value supplied to the fixed resistor and the variable resistor The voltage induces a voltage change depending on the amount of rotation of the crank 209. Accordingly, the microcomputer (not shown) provided as the drum washing machine senses the voltage change and adjusts the RPM of the drum motor 113 according to the voltage change amount, thereby suppressing the vibration of the drum 112.

5 is a view showing the main configuration of the microcomputer for the vibration suppression control of the drum washing machine according to the present invention. As shown, an AD converter 501 (ADC) for converting and outputting a voltage change detected from the potentiometer 207 into a digital signal, and the drum motor 113 in response to a voltage difference variation of the potentiometer 207. Extracts the maximum voltage and the minimum voltage based on the memory 505 for storing the voltage difference RPM information for calculating the RPM of the RPM and the output data of the AD converter 501, and extracts the maximum voltage and the minimum voltage. A control unit 503 for calculating a voltage difference with respect to the voltage difference, extracting the ALPM information of the drum motor 113 corresponding to the voltage difference from the memory 505, and generating a drum motor control signal corresponding to the ALPM information; The driver 507 is configured to adjust the ALPM of the drum motor 113 in response to the drum motor control signal provided from the controller 503.

The microcomputer of the drum washing machine configured as described above, first, the variable resistor mounted into the potentiometer 207 is changed according to the flow state of the piston 203, so that the voltage across the variable resistor varies. The voltage across the fixed resistor is inversely proportional to the resistance of the variable resistor. Accordingly, the output voltage of the potentiometer 207 is output as an asymmetric sinusoidal signal corresponding to the flow of the piston 203. The AD converter 501 converts a sinusoidal signal output from the potentiometer 207 into digitized information and provides it to the controller 503.

The controller 503 recognizes the digitized information according to the output signal of the potentiometer 207 and extracts the highest voltage and the lowest voltage. In addition, the controller 503 calculates the difference between the highest voltage and the lowest voltage, and then enables the memory 505 to extract AlpM information of the drum motor 113 with respect to the voltage difference. The RMP information of the drum motor 113 is inversely proportional to the voltage difference, and may be dependent on the actual experimental value information. For example, when the difference between the maximum voltage and the minimum voltage of the asymmetric sine wave signal output from the potentiometer 207 is large, that is, when the flow range of the piston 203 is large, the drum washing machine recognizes that the vibration of the drum washing machine is large. 503 minimizes vibration by reducing the RPM of the drum motor 113. On the other hand, when the voltage difference is small, the vibration of the drum washing machine is low, and the controller 503 performs the RPM control of the drum motor 113 based on a normal program.

While the invention has been shown and described with respect to specific preferred embodiments thereof, the invention is not limited to the embodiments described above, and is commonly used in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Anyone with knowledge will be able to make various variations.

As described above, the device for detecting the vibration of the drum washing machine is installed between the piston and the cylinder constituting the damper, to form a link member for converting the linear movement of the piston into a rotational movement, and linked with the link member By mounting a potentiometer for outputting a variable voltage according to the rotational movement of the drum washing machine, it is possible to directly detect the vibration state of the drum washing machine due to the amount of eccentricity of the drum washing machine. It provides an effect that can be performed more accurately.

Claims (4)

In the vibration washing apparatus of the drum washing machine for detecting the vibration of the drum washing machine, and controlling the RPM of the drum motor according to the detection result, A link member for connecting the upper side of the piston constituting the damper with the upper side of the cylinder for accommodating the piston to convert the linear movement of the piston into a rotary movement; A potentiometer for varying the resistance in response to the rotational movement of the link member; And Vibration sensing device using a damper of the drum washing machine characterized in that it comprises a microcomputer for controlling the RPM of the drum motor after recognizing the vibration state of the drum washing machine in proportion to the variable resistance value detected from the potentiometer . The apparatus of claim 1, wherein the microcomputer calculates an ADC for converting and outputting the voltage change detected from the potentiometer into a digital signal, and an RPM of the drum motor in response to a change in the voltage difference of the potentiometer. A memory for storing the voltage difference RPM information, and extracting the maximum voltage and the minimum voltage based on the output data of the AD converter, calculating a voltage difference between the maximum voltage and the minimum voltage, and a drum corresponding to the voltage difference. After extracting the AlpM information of the motor from the memory, the control unit for generating a drum motor control signal corresponding to the Alpim information, and a driver for adjusting the Alpamp of the drum motor in response to the drum motor control signal provided from the control unit Jin using the damper of the drum washing machine, characterized in that consisting of Sensing devices. The rotating member of claim 1, wherein the link member is rotatably fastened between the fixing member for installing the potentiometer spaced apart from the cylinder by a predetermined distance, and the potentiometer and the cylinder spaced apart from the fixing member. And a crank for rotating the potentiometer in response thereto, and an arm for interlocking with the piston and for rotating the crank through a linear movement of the piston. The potentiometer according to any one of claims 1 to 3, wherein the potentiometer includes a variable resistor for varying a resistance value corresponding to the rotation angle of the crank, and a fixed resistor for inducing a voltage change in response to a change in the resistance value of the variable resistor. And a voltage change is measured from both ends of the series resistor after being connected in series with each other and supplied with a DC voltage having a predetermined value at both ends of the variable resistor and the series resistor.

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