KR101583346B1 - Washing machine and control method of the same - Google Patents

Abstract

The present invention relates to a laundry processing apparatus and a laundry processing apparatus which minimize the heat generation of a driving driver that controls the actual rate of a motor for driving a pulsator or a driving current providing a driving signal of a high current to a motor, A control method is disclosed.

Motor, drive driver, actual speed, heat

Description

[0001] Washing machine and control method of the same [0002]

The present invention relates to a laundry processing apparatus and a control method thereof. More particularly, the present invention relates to a laundry processing apparatus for controlling heat generation of a driving driver for controlling a real rate of a motor for driving a laundry processing apparatus, And a control method.

Generally, a laundry processing apparatus refers to a device that removes foreign matter from laundry by treating laundry.

The process of washing laundry by the laundry processing apparatus is largely divided into a process of mixing the detergent into the washing water, a process of putting the washing water mixed with the detergent into the washing tub, a process of washing the laundry using the washing water mixed with the detergent, A process of introducing the washing water not containing the detergent into the washing tub to rinse the laundry, and a dewatering process of removing the washing water from the laundered laundry. In addition, the laundry process may further include a laundry process for drying, ironing and discharging the laundry. Basically, the laundry process is based on a detergent mixing process, a washing process, a rinsing process, and a dewatering process.

The detergent mixing process, the washing process, the rinsing process, and the dewatering process are performed by driving a motor installed in the laundry processing apparatus. The motor can be washed, dehydrated, or rinsed by forward, reverse, or continuous rotation of the pulsator installed in the washing tub or the washing tub.

At this time, a normal laundry processing apparatus that continuously rotates or rotates the motor continuously generates a driving driver that provides a driving signal to the motor.

The drive driver applies a high-current drive signal to the motor to drive the motor. Therefore, when the motor is continuously driven in one direction, the heat generation is increased in proportion to the drive time of the motor. The normal drive driver is called IPM (Intelligent Power Module) and drives the motor by supplying the drive current between 10A and 15A as the motor. Therefore, when the laundry is processed by continuously driving the motor, the driving driver must be stopped or the driving driver must be stopped due to overheating of the driving driver for driving the motor. Therefore, there is a demand for minimizing the heat generation of the driving driver for driving the motor when the laundry processing apparatus is operating.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laundry processing apparatus and a control method thereof for improving stability by minimizing the heat generated by a driving driver for driving a motor of a laundry processing apparatus.

According to another aspect of the present invention, there is provided a driving method of a driving device for controlling a motor, the method comprising the steps of: providing a driving signal having a real rate control period set by a motor driving one of a washing tub and a pulsator; And controlling the heat generation of the drive driver in the step of FIG.

According to another aspect of the present invention, there is provided a washing machine comprising: a driving driver for supplying a driving signal to a motor for driving one of a washing tub and a pulsator; and a controller for providing a driving pattern, And a control section for controlling the heat generation of the drive driver.

According to the laundry processing apparatus and the control method thereof according to the present invention, even when the laundry processing apparatus is driven for a long time, the heat generated by the driving driver for driving the motor is minimized and the laundry processing apparatus can be stably operated.

1 is a cross-sectional view of a laundry processing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the laundry processing apparatus includes a cabinet 10, a top cover 200 disposed on the upper side of the cabinet 10 and forming a laundry access hole for allowing laundry to enter and exit, A lid assembly 100 for opening and closing the access hole, and a control panel 400 for providing an interface for a user to operate the laundry processing apparatus.

An outer tub 31 suspended from a support member 20 is disposed inside the cabinet 10 and an inner tub 35 is rotatably disposed inside the outer tub 31. [

In the present invention, the inner bath 35 and the outer bath 31 are hereinafter referred to as one "washing tub" 30 when there is no need to separate the inner bath 35 and the outer bath 31 separately. The outer tub 31 and the inner tub 35 are not separately described in the description of the washing cycle in which the detergent and the washing water are mixed and the liquid detergent is sprayed onto the laundry in the present invention.

A damper 25 is installed at the lower end of the support member 20 to buffer the vibration of the outer tank 31 due to the vibration generated when the inner tank 35 rotates, The pulsator 40 is disposed.

A motor 50 serving as a drive means for rotating the inner tank 35 and the pulsator 40 is disposed below the outer tank 31. The motor 50 is connected to the inner tank 35 through the rotating shaft 55 to rotate the inner tank 35 and the rotating force of the motor 50 is transmitted between the inner tank 35 and the pulsator 40 by the inner tank 35 And a clutch (not shown) selectively transmitting to the pulsator 40 can be disposed. Therefore, the inner tank 35 and the pulsator 40 can rotate only the inner tank 35 through the clutch, only the pulsator 40 rotates, or the inner tank 35 and the pulsator 40 can rotate at the same time .

The top cover 200 is provided with a detergent box 60 in which the detergent is received and disposed so as to be able to flow in and out, a water supply hose 70 connected to the external water source for supplying washing water to the detergent box 60, A water supply valve 75 for interrupting washing water flowing through the water supply valve 70 is disposed. When the water supply valve 75 is opened and the washing water is supplied from the external water source, the supplied washing water flows into the detergent box 60 and then is supplied to the inner tank 35.

Washing water supplied from the detergent box 60 to the inner tank 35 is introduced into the outer tub 31 through a plurality of water holes 36 formed in the inner tub 35 and accommodated in the inner tub 35.

A drainage hose 80 for draining the washing water in the outer tub 31 to the outside and a drainage control valve 85 for interrupting the washing water flowing out through the drainage hose 80 are provided at the lower end of the outer tub 31, And a drain pump 86 are provided.

2 is a view for explaining the control flow of the laundry processing apparatus of the present invention.

2, when the user sets the washing course and the washing time by operating the control panel 230 after the laundry is put into the washing tub 30, the controller 210 calculates the amount of washing water according to the washing course, The amount of the detergent and the time for rotating the washing tub 30 and the rotation pattern are determined and the detergent is dispensed to the washing tub 30 according to the determined condition and then the water feed driving part 250 is controlled, Water tea. At this time, the amount of washing water supplied to the washing tub 30 is controlled by referring to the quantity detected by the sensor 220.

The memory 270 has a driving pattern of the motor 50 according to a user-set washing course, and the actual pattern of the motor 50 is set in the driving pattern.

The actual rate of the motor 50 is defined as the ratio of the time actually driven by the motor 50 to the total time that the motor 50 should be driven. Therefore, the motor actual speed is defined by the following equation (1).

Here, T _on represents the time when the motor 50 is actually driven in the driving section of the motor 50, and T _off represents the time during which the motor 50 is not driven in the driving section of the motor 50. That is, when the actual rate of the motor 50 is less than 1, the driving signal provided to the motor 50 is off in the time period set for the motor 50 to be driven. The motor 50 and the IPM driver 240 can obtain a time period during which the heat generation is stopped by the actual power ratio of less than 1 and thus the heat generated during driving the motor 50 can be reduced.

On the other hand, the actual rate of the motor 50 is determined not by the actual rate value stored in the memory, but by the drive pattern formed in consideration of the actual rate value. That is, the control unit 210 uses the drive pattern provided in the memory 270 to temporarily turn the IPM driver 240, which transmits the drive signal to the motor 50 within the time period during which the motor 50 is to be driven, And controls so that the heat of the IPM driver 240 is not continuously increased.

The control unit 210 determines the time period to be driven by the motor, the RPM of the motor, the rotation direction of the motor, the rotation pattern, and the like according to the user-set laundry course, and provides the IPM driver 240 with the determined time period. At this time, the controller 210 refers to the memory 270 and provides the IPM driver 240 with a drive pattern to which the actual rate of the motor 50 is applied. The driving pattern provided from the control unit 210 to the IPM driver 240 is provided with an off interval during which the motor 50 is temporarily stopped during the time period during which the motor 50 is driven.

In the drive pattern, the IPM driver 240 is provided with an off period in which the drive current is not applied to the motor 50 within the time period during which the motor 50 is driven.

Off period may be arranged with a constant period or the applicant who designs and manufactures the laundry processing apparatus according to the present invention may form an irregular pattern. In addition, the size of the off period can be increased or decreased to reduce the heat generation of the IPM driver 240.

Next, the control unit 210 controls the IPM driver 240 with reference to the washing course and the driving pattern, and the IPM driver 240 applies a driving signal to the motor 50 to drive the washing tub 30 or pulsator 40, and the laundry is washed using the frictional force formed by the washing tub 30 or the pulsator 40. The IPM driver 240 can rotate the motor 50 forward or reverse.

The control unit 210 controls the IPM driver 240 to drive the motor 50 so that the motor 50 alternately repeats forward rotation and reverse rotation so that the rotation of the washing tub 30 and pulsator 40 can alternate between forward rotation and reverse rotation. The control unit 210 can increase the washing efficiency of the laundry by controlling the IPM driver 240 so that the washing tub 30 or the pulsator 40 alternately repeats forward rotation and reverse rotation.

At this time, the controller 210 rotates the washing tub 30 and the pulsator 40 in one direction to form a rising water flow in the washing tub 30, and the washing water including the detergent and the laundry Allow it to mix well.

The control unit 210 drives the drainage control valve 85 and the drain pump 86 through the drainage driving unit 250 so that the drainage pump 85 and the drainage pump 86 are fully charged to the washing tub 30, The washing water is discharged and new washing water is supplied to the washing tub 30 through the water supply driving unit 260 and the laundry is dehydrated using new washing water.

FIG. 3 is a flowchart illustrating a method of controlling a laundry processing apparatus according to the present invention.

First, the controller 210 determines a user-set laundry course through the control panel 230 (S301), and uses the detergent box 60 to wash the washing water mixed with the detergent in the washing tub 30 (S302). Next, the controller 210 accesses the memory 270 to acquire a driving pattern for the user-set laundry course. At this time, the off-time is set in the drive pattern in order to control the actual rate. Next, the control unit 210 determines a point at which the motor 50 should be driven through the driving pattern (S303).

The control unit 210 determines the actual rate control period with reference to the drive pattern and provides information on the actual rate control period to the IPM driver 240 to determine the actual rate control (S304). The IPM driver 240 turns on or off the current of the drive signal for driving the motor 50 using the information on the actual rate control period provided by the control unit 210 and outputs it to the IPM driver 240) is not continuously increased.

Next, the control unit 210 senses the temperature of the IPM driver 240 using the sensor 220 (S305), and determines whether the sensed temperature is out of the reference temperature range (S306). Since the IPM driver 240 is a semiconductor device or a semiconductor integrated circuit that controls the current for driving the motor 50 on and off, there is a risk of breakage when the IPM driver 240 exceeds 90 degrees to 100 degrees. Therefore, it is preferable that the reference temperature is set within a temperature range of 90 to 100 degrees.

If the temperature of the IPM driver 240 exceeds the reference temperature and the temperature of the sensor 220 is overheated as a result of the temperature sensing of the sensor 220, the controller 210 turns off the IPM driver 240 so that the IPM driver 240 is not damaged (S307). When the temperature of the IPM driver 240 is lower than the reference temperature, the actual rate control is continuously performed.

4 shows a reference diagram for an example of actual rate control according to the present invention.

In the graph shown in FIG. 4, the vertical axis represents the current supplied to the motor 50 from the IPM driver 240, and the horizontal axis represents time.

In Fig. 4, section A1 shows a section for supplying water to the laundry, which is supplied to the washing tub 30, and preparing the washing cycle. The controller 210 controls the washing tub 30 to repeat the forward rotation and the reverse rotation gently so that the laundry is not loosened and is loosened after the wash water is supplied to the laundry loaded in the washing tub 30 in the section A1. At this time, the IPM driver 240 changes the direction of the electric current so that the washing tub 30 repeats the normal rotation and the reverse rotation, and provides the same to the motor 50. In the section A1, the IPM driver 240 provides the motor 50 with a drive signal having a current of about 2 A to 6 A, and the temperature Temp is in the range of 20 to 40 degrees.

The section A 2 is a section in which the washing of the laundry is performed by rotating the motor 50 repeatedly in the forward rotation and the reverse rotation. Since the interval A2 is a period in which the laundry is to be rotated strongly, the actual rate increases to the maximum, the current supplied from the IPM driver 240 to the motor 50 is close to 12A, and the temperature of the IPM driver 240 also reaches a maximum .

When the motor 50 has the highest actual rate, the heat of the IPM driver 240, which provides a high-current drive signal to the motor 50, also reaches its peak. If this state is maintained for a long time, the heat of the IPM driver 240 continuously increases, and it may become an overheated state.

On the other hand, in the section A2, the motor 50 is driven at an actual rate of less than 1.

The IPM driver 240 causes the motor 50 to repeat the T _on and T _{off so} that the driving signal provided to the actual motor 50 has an intermittent form.

For example, the IPM driver 240 applies a driving signal for rotating the motor 50 for 1200 ms, and then does not apply the driving signal for 300 ms, so that the semiconductor devices constituting the IPM driver 240 can continuously supply a high current Do not output. Here, when having a driving state for 1200 ms and an off state for 300 ms, the actual rate corresponds to 0.8 according to the equation (1).

FIG. 5 shows a reference diagram for explaining the actual rate control according to the present invention.

Referring to FIG. 5, the driving signal provided to the motor 50 by the IPM driver 240 has three driving states (ON) and two non-driving states (OFF).

When the motor 50 is in the driving state (ON), the IPM driver 240 receives the driving signal and rotates. At this time, even if the motor 50 does not receive the driving signal in the non-driving state (OFF), the motor 50 can perform the driving force using the rotational force when the motor 50 is in the driving state (ON). The time for performing the attraction force operation is the same as the time for the non-drive state (OFF), and corresponds to several tens ms to several hundreds ms. Therefore, when the motor 50 is in the non-driving state (OFF), the rotational speed does not rapidly decrease. At this time, since the IPM driver 240 does not output the drive signal of high current to the motor 50, Do not.

6 shows reference figures for explaining the actual ratios of the present invention.

Referring to FIG. 6, the actual rate refers to a ratio at which the actual motor 50 is driven, and is proportional to the time at which the drive signal is applied to the motor 50.

The actual rate increases when the motor 50 needs to rotate strongly for a washing or dewatering run and decreases when it is in the process of properly loosening the laundry in the washing tub 30 or preparing for washing. The fact that the actual rate is 0 means that the motor 50 does not rotate due to a washing process such as water supply or drainage and that the actual rate is 1 means that the motor 50 is constantly rotating, Current signal through the IPM driver 240 and is in a rotating state.

FIGS. 7 and 8 show reference drawings for comparing the heat generation of the IPM driver by the actual rate control section of the present invention.

First, FIG. 7 shows a temperature change when the actual rate control section is not set in the laundry processing apparatus of the present applicant.

Referring to FIG. 7, when the IPM driver 240 continuously supplies the high-current driving signal to the motor 50 during the period T1, it can be seen that the temperature temp1 is continuously increasing.

Next, Fig. 8 shows the temperature change when the actual rate control period is used.

Referring to FIG. 8, during the interval T2, the IPM driver 240 divides one driving signal into two and does not provide a driving signal between the two driving signals B1 and B2.

The temperature temp2 of the IPM driver 240 is temporarily lowered by the T21 region where the driving signal B1 converges to 0, and then raised again by the driving signal B2.

However, the temperature (temp2) of the IPM driver 240 does not suddenly overheat because the increase in temperature (temp1) shown in FIG. 7 becomes gentler. In addition, since the drive signals B1 and B2 shown in FIG. 8 are repeated patterns, the heat of the IPM driver 240 can not be rapidly increased.

As described above, the home appliance according to the present invention has been described with reference to the drawings. However, the present invention is not limited to the embodiments and drawings disclosed in the present specification, and can be applied within the scope of protection of technical ideas.

1 is a sectional view of a laundry processing apparatus according to an embodiment of the present invention,

2 is a view for explaining a control flow of the laundry processing apparatus of the present invention,

FIG. 3 is a flowchart of a method for controlling a laundry processing apparatus according to the present invention,

4 is a reference drawing of an example of actual rate control according to the present invention,

FIG. 5 is a view for explaining the actual rate control according to the present invention,

6 is a reference drawing for explaining the actual rate of the present invention, and

FIGS. 7 and 8 show reference drawings for comparing the heat generation of the IPM driver by the actual rate control section of the present invention.

Claims (10)

In a driving driver for controlling a motor, a step of providing a driving signal in which an actual rate control section is set by a motor driving one of a washing tub and a pulsator; And Controlling the heat generation of the driving driver in an actual rate control period of the driving signal; Detecting a temperature of the driving driver; And And shutting off the driving of the driving driver when the detected temperature is out of a preset reference temperature, The actual rate control section is set according to a drive pattern of the motor, Wherein the step of controlling the heat generation comprises: Wherein the size of the off-period of the actual rate control section is increased to reduce the heat generation of the driving driver. The method according to claim 1, Wherein the actual rate control section includes: Wherein the control signal is an off-period that is formed in one area of a driving signal for driving the motor and in which no current is applied. The method according to claim 1, Wherein the actual rate control section includes: Wherein the actual rate of the motor is set to a value between 0 and 1. The method according to claim 1, Wherein the actual rate control section includes: Wherein the controller is set for one of forward rotation and reverse rotation of the motor. delete A washing tub, and a pulsator; a driving driver for providing a driving signal to the motor driving one of the pulsator; And And a control unit for controlling the heat generation of the driving driver by providing a driving pattern in which an actual rate control period for the motor is set by the driving driver, The actual rate control section is set according to a drive pattern of the motor, Wherein, Wherein the controller is configured to increase the size of an off period during which the driving current is not applied to the motor during the actual rate control period, Wherein the controller stops the driving of the driving driver when a detected temperature exceeds a preset reference temperature through a sensor for detecting the temperature of the driving driver. The method according to claim 6, Wherein the actual rate control section includes: Wherein the driving signal is formed in one area of the driving signal and is an off period during which no current is applied. The method according to claim 6, Wherein the actual rate control section includes: And the actual rate of the motor is set to a value between 0 and 1. The method according to claim 6, Wherein the actual rate control section includes: Wherein the rotation of the motor is set for one of forward rotation and reverse rotation of the motor. delete

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