KR102344065B1 - Control method for cloth treating apparatus - Google Patents

Abstract

The present invention relates to a method of controlling a laundry treatment apparatus, the method comprising a BLDC motor and a driving device including a belt and a pulley for transmitting power from the BLDC motor to a clutch, the control method comprising: accelerating the BLDC motor to a first target rpm by applying a current to the BLDC motor; decelerating the rotation speed of the BLDC motor to a second target rpm; detecting the rotation speed of the BLDC motor and comparing it with a first set rpm higher than the first target rpm; sensing the amount of raisins by maintaining the rotation speed of the BLDC motor at the second target rpm; and performing a washing cycle according to the detected amount of dry matter, when the detected rotation speed of the BLDC motor is higher than a first set rpm, it is determined that the belt is detached from the pulley, and the rotation speed of the BLDC motor is If it is lower than the first set rpm, the above washing cycle is performed.

Description

BACKGROUND ART Control method for cloth treating apparatus

The present invention relates to a clothes processing apparatus, and more particularly, to a garment using a BLDC motor to detect belt detachment and slip of the driving device in the process of detecting the amount of laundry at the start of a washing cycle in the driving device. It relates to a control method of a processing device.

In general, a clothes treatment apparatus is a home appliance that removes contaminants such as clothes and bedding by using the emulsification action of detergent and friction and impact of a water stream according to rotation of a rotary blade. Recently, a washing method is automatically set by detecting the amount and type of laundry by a sensor, and after supplying water to an appropriate water level according to the amount and type of laundry, washing is performed by microprocessor control.

On the other hand, such a laundry treatment apparatus can be divided into a top-loading type laundry treatment apparatus in which the laundry is put in from the top to the bottom according to the direction in which the laundry is put in, and a front-loading type laundry treatment apparatus in which the laundry is put in from the front to the rear. .

Here, in the top-loading clothing treatment apparatus, a water storage tank installed in a cabinet and a rotary tank combined with a rotary tank having a plurality of dewatering holes in the tank are rotatably installed. A rotary blade is rotatably installed in the lower center of the rotary tub. And a driving device including a clutch and a motor for rotating the rotary tank and the rotary blades is installed at the lower portion of the water storage tank.

On the other hand, in the case of a driving device provided in a top-loading type clothes processing apparatus, a motor that generates power (rotation force) for rotating the rotating tub and a clutch for controlling power transmitted from the motor to the rotating tub and rotating blades are generally used. be prepared In addition, in the case of such a driving device, depending on the power transmission method of the motor, the rotary shaft of the coater and the rotary shaft of the rotary shaft or the rotary blade are located on the same axis, or the rotary shaft of the motor and the rotary shaft of the rotary shaft or the rotary shaft are spaced apart and separate power transmission means It may be configured to transmit power by

In the case of a motor provided in the driving device of the laundry treatment apparatus, an inverter motor of an in/out rotor type, a DC motor of an in/out rotor type, etc. may be used, and advantages and disadvantages according to the use of each motor are classified.

On the other hand, recently, a clothes processing apparatus using an inner rotor type BLDC motor has been developed, and it is necessary to improve the structural design and power transmission structure of the driving device according to the use of the inner rotor type BLDC motor, and to improve the control method.

On the other hand, in the case of using the inner rotor type BLDC motor, the inner rotor type BLDC motor is driven at a relatively high rpm, and when the inner rotor type BLDC motor is used for a long time, a power transmission device (for example, a belt and a The transmission structure of the pulley) is tensioned or loosened, causing slippage in the power transmission device, which prevents smooth power transmission. Therefore, it is necessary to improve the structural design of the driving device and the power transmission structure and improve the control method.

In addition, in the case of a belt and pulley type power transmission device that transmits the power of the BLDC motor, it is not possible to distinguish and respond to malfunctions due to belt detachment or slipping. It is a situation in which only the detachment of the belt is detected by detecting when the vehicle is not decelerated.

However, when the belt separation of the power transmission device is detected using only the rotation speed of the motor, the number of rotations of the motor sensed by the slip of the belt is similar to the number of rotations of the motor according to the separation of the belt. There are problems that are difficult to deal with.

The present invention has been devised to solve the above problems, and in a clothes processing apparatus using an inner rotor type BLDC motor, the rotation speed of the BLDC motor is sensed to detect belt separation and belt slippage of the driving device. An object of the present invention is to provide a method for controlling a processing device.

According to an embodiment of the present invention, there is provided a method of controlling a clothes treating apparatus including a BLDC motor and a driving device including a belt and a pulley for transmitting power from the BLDC motor to a clutch. In the method, the control method comprises the steps of applying a current to the BLDC motor to accelerate the BLDC motor to a first target rpm, and decelerating a rotation speed of the BLDC motor to a second target rpm; detecting the rotational speed of , comparing it with a first set rpm higher than the first target rpm; maintaining the rotational speed of the BLDC motor at the second target rpm to detect the amount of raisins; and performing a washing cycle according to If it is lower than that, it is preferable to perform the washing cycle.

In the detecting of the amount of dry matter, the amount of current of the BLDC motor may be sensed by maintaining the rotation speed of the BLDC motor at the second target rpm.

When it is determined that the belt is separated from the pulley, it is preferable to stop the operation of the BLDC motor.

It is preferable to further include a display step of displaying the belt to the user when it is determined that the belt is separated from the pulley.

Preferably, the method further includes the step of determining whether a slip phenomenon occurs between the belt and the pulley according to the detected amount of cloth detected in the step of detecting the amount of dry cloth.

When it is determined that the slip phenomenon occurs, it is preferable to change the washing cycle to the sleep mode washing cycle.

Preferably, the first target rpm is 40 to 50 rpm, the second target rpm is 25 to 35 rpm, and the first set rpm is 90 to 110 rpm.

Preferably, the driving device includes a clutch that receives the rotational force of the BLDC motor and selectively transmits the rotational force, and a power transmission unit that transmits the rotational force of the BLDC motor to the clutch.

The power transmission unit includes a motor pulley installed on the rotation shaft of the BLDC motor, a clutch pulley mounted on the rotation shaft of the clutch, and a length on an inner surface that connects the motor pulley and the clutch pulley and is in contact with the motor pulley and the clutch pulley It is preferable to have a belt in which a plurality of V-grooves are formed in the direction.

It is preferable that a plurality of V protrusions inserted into the V grooves of the belt are formed on the outer circumferential surface of the motor pulley, and the clutch pulley is formed of a flat pulley.

Among the plurality of V projections formed on the outer peripheral surface of the motor pulley, it is preferable that separation prevention projections for preventing separation of the belt by protruding more than the V projections inserted into the V grooves are further formed on both sides of the belt in the width direction.

According to the control method of the laundry treatment apparatus according to the present invention, in the laundry treatment apparatus using the inner rotor type BLDC motor, the rotation speed of the BLDC motor is sensed to detect the belt separation and the belt slip of the driving device to ensure smooth operation of the laundry treatment apparatus It has a sustainable effect.

1 is a simplified diagram showing an embodiment of a clothes processing apparatus according to the present invention.
2 is a bottom perspective view showing a driving device for a clothes processing apparatus according to the present invention.
3 is a side view illustrating a driving device of a clothes processing apparatus according to the present invention.
4 is a cross-sectional view showing the clutch of the driving device according to the present invention.
5 is a plan view showing a power transmission unit of the driving device according to the present invention.
6 is a cross-sectional view showing a power transmission unit of the driving device according to the present invention.
7 is a flowchart illustrating a control process of the clothes processing apparatus according to the present invention.
8 to 10 are graphs illustrating rpm changes of a motor and a clutch of the clothes processing apparatus according to the present invention.

Hereinafter, a clothes processing apparatus and a control method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, the names of each defined component are defined in consideration of functions in the present invention. Therefore, it should not be construed as limiting the technical components of the present invention. In addition, each name defined for each component may be called another name in the art.

First, a clothes processing apparatus according to an embodiment of the present invention will be briefly described with reference to the accompanying drawings.

1 is a simplified diagram showing an embodiment of a clothes processing apparatus according to the present invention.

As shown in FIG. 1 , in the top-loading clothing processing apparatus according to an embodiment of the present invention, a case 110 having an open top and a door for opening and closing the top is installed, and a spring and a damper in the case 110 . The water storage tank 120 supported by a shock absorber such as Rotating blades 136 for washing laundry in the rotating tub 130 by rotating separately from the tub 130 are rotatably installed.

A water supply unit 140 for supplying wash water to the water storage tub 120 is provided at the upper inner side of the case 110, and a drain unit for draining the wash water supplied to the water storage tub 120 at the lower inner side of the case 110 ( 150) is provided.

A BLDC motor 220 and a BLDC motor providing power to the clutch 230 and the clutch 230 for controlling power transmission to selectively rotate the rotating tub 130 and the rotating blades 136 in the lower portion of the water storage tub 120 . The driving device 200 including the power transmission unit 240 for transmitting the rotational force of the clutch 230 is installed.

On the other hand, the case 110 forms the outer shape of the clothes processing apparatus 100 and, at the same time, forms an inner space in which each of the above-described components is installed. The case 110 may be formed of an upper housing 112 forming an upper portion of the laundry treatment apparatus 100 and a lower housing 118 forming a lower portion of the laundry treatment apparatus 100 . Here, the upper housing 112 is provided with a door 114 for putting laundry into the rotary tub located inside the water storage tub 120 , and the front of the door 114 controls the clothes processing apparatus 100 or clothes A control panel 116 indicating an operating state of the processing device 100 may be provided. The lower housing 118 forms the outer surface of the laundry treatment apparatus 100 and, at the same time, supports the water storage tank 120 to be buffered by a separate suspension 126 .

And the water storage tub 120 has an open top surface to form a water storage opening 122 for introducing laundry into the rotary tub 130, and the lower surface of the water storage tub 120 has a rotary tub 130 and rotary blades 136. A driving device 200 for rotating the is installed.

On the other hand, the water storage tank 120 is supported in a floating state by the suspension 126 fixed to the inner surface of the lower housing 118 , and the vibration generated in the rotating tank 130 and transmitted to the water storage tank 120 is transmitted to the water storage tank 120 . ) is attenuated by the suspension 126 supporting the vibration and transmitted to the lower housing 118 .

The rotating tub 130 is rotatably provided inside the water storage tub 120 by a driving device 200 to be described later. An inlet 132 into which laundry is put is formed at the upper portion of the rotary tub 130 , and a plurality of spin-drying for discharging wash water in the rotary tub 130 when the rotary tub 130 rotates is formed on the inner circumferential surface of the rotary tub 130 . A ball (not shown) is formed, and a rotating blade 136 is provided at a lower portion of the rotating tub 130 to separately rotate with respect to the rotating tub 130 to form a flow of washing water for washing laundry. Here, the inlet 132 of the rotating tub 130 may further include a balancer 134 for compensating for the eccentricity of the rotating tub 130 due to the eccentricity of laundry when the rotating tub 130 rotates.

The water supply unit 140 is provided inside the upper housing 112 to supply washing water to the water storage tank 120 . Here, the water supply unit 140 is connected to an external water supply source (not shown), and a water supply valve 142 for controlling the supply of wash water is provided. The water supply valve 142 is provided with a water supply passage 144 through which the wash water supplied by the water supply valve 142 is guided to the water storage tank 120 . On the other hand, the water supply passage 144 may be further provided with a separate detergent supply device (not shown) for supplying detergent, such as supply of washing water for washing laundry.

The drain unit 150 is provided at the lower portion of the lower housing 118 and is supplied to the water storage tank to drain the laundry water generated during washing, rinsing, and spin-drying of laundry. The drain unit 150 is connected to a bellows-type connection hose 152 connected to the lower part of the water storage tank 120 and the connection hose 152 and is linked to the operation of the clutch 230 of the driving device 200 . A drain valve 154 (or a drain pump) for draining the wash water and a drain channel 156 for guiding the wash water discharged by the drain valve 154 to the outside of the laundry treatment apparatus 100 are provided.

The driving device 200 is provided under the bottom surface 124 of the water storage tank 120, and receives the BLDC motor 220 that generates a rotational force, and the rotational force of the BLDC motor 220, and converts the received rotational force into the rotating tub 130. Alternatively, the clutch 230 selectively connected to the rotary blade 136 and the BLDC motor 220 and the clutch 230 are connected to each other to transmit the rotational force of the BLDC motor 220 to the clutch 230 ( 240) is provided.

The controller (not shown) may control each of the above-described components with respect to information input through the control panel 116 , and display the operating state of the clothes processing apparatus 100 through the control panel 116 . Also, the controller may sense the belt detachment of the driving device 200 by sensing the rotation speed of the BLDC motor 220 while the driving device 200 of the clothes processing apparatus 100 is operating.

Hereinafter, the driving device 200 will be described in detail with reference to FIGS. 2 to 4 .

2 is a bottom perspective view showing the driving device of the clothes processing apparatus according to the present invention, FIG. 3 is a side view showing the driving device of the clothes processing apparatus according to the present invention, and FIG. 4 is a clutch of the driving device according to the present invention It is a cross section.

As shown, the driving device 200 is fixedly installed under the bottom surface of the water storage tank 120 and forms a space in which the BLDC motor 220 and the clutch 230 are installed, the mounting plate 210, and the mounting plate 210 A BLDC motor 220 installed on one side of the to generate rotational force, a clutch 230 installed on the other side of the mounting plate 210 to receive the rotational force of the BLDC motor 220, and the BLDC motor to transmit the rotational force to the clutch A power transmission unit 240 is provided.

Here, the mounting plate 210 is provided with a motor mounting unit 212 for mounting the BLDC motor 220 on one side, and a clutch mounting unit 214 for mounting the clutch 230 at the center thereof. In addition, an electric field mounting part 216 for mounting electric components (not shown) of the driving device 200 is formed on the other side of the mounting plate 210 .

On the other hand, in the case of the motor mounting unit 212, it is formed to be depressed in the opposite direction to the direction in which the motor is mounted in order to secure an installation space for the BLDC motor 220, and the BLDC motor 220 is located on the outer peripheral surface of the motor mounting unit 212. A plurality of fastening holes (not shown) for fastening are formed. In addition, in the case of the clutch mounting unit 214 , a rotation shaft hole (not shown) into which the upper/lower washing shafts 232a and 232b of the clutch 230 to be described later are inserted are formed, and the clutch 230 is formed on the outer peripheral surface of the clutch mounting unit 214 . ), a plurality of fastening holes (not shown) to which the clutch housing 231 is fastened are formed.

And the BLDC motor 220 includes a motor housing 225 forming an outer shape, a stator (not shown) fixed to the inside of the motor housing 225, a rotor (not shown) rotated by the stator, and a rotor It has a rotating shaft 226 to rotate. Here, the BLDC motor 220 has the same structure as the general BLDC motor 220 , and an inner rotor type BLDC motor 220 is preferably used. However, the use of the outer rotor type BLDC motor 220 is not excluded and may be selectively used as necessary.

Here, it is preferable that the motor housing 225 be integrally formed by injection molding so as to surround the outer surfaces of the stator and the rotor. Here, when the motor housing 225 is integrally formed by injection molding, an unnecessary internal space of the BLDC motor 220 may be reduced, and the overall size of the BLDC motor 220 may be reduced.

In addition, a pair of support brackets 227 extending to the mounting plate 210 are formed on the outer surface of the motor housing 225 , and the support bracket 227 is made of the same material as the motor housing 225 . can be formed integrally with This support bracket 227 is reduced in external size as the motor housing 225 is formed by injection molding so that the position of the rotation shaft 226 of the BLDC motor 220 and the position of the rotation shaft 226 of the clutch 230 are As it is formed differently, the position of the rotation shaft 226 of the BLDC motor 220 may be compensated.

On the other hand, in the case of the BLDC motor 220 of the driving device 200 as described above, in the case of the prior art, an inverter motor is mainly used. In the case of a driving unit of a clothes processing apparatus using such an inverter motor, an inverter that converts DC power into AC power by a switching operation and outputs the converted AC power to the motor, a voltage detector that detects the voltage of the DC power, and the motor An output current detector for detecting a flowing output current and a controller for controlling the inverter based on the detected output current should be essentially provided.

In the case of a driving unit of a washing machine using an inverter motor according to the prior art, an inverter for driving the inverter motor is essential, and this has a problem in that the driving unit is structurally complicated.

Therefore, by using the BLDC motor 220 of the present invention, the driving device 200 can be simplified, and an installation space for the driving device 200 can be secured by injection molding the external shape of the BLDC motor 220 . have.

On the other hand, the clutch 230 receives the rotational force of the BLDC motor 220 and selectively transmits the received rotational force to the rotating tub 130 or/and the rotating blades 136, and at the same time, the drainage unit 150 according to the rotational direction. It is provided to open and close the drain valve 154 of

The clutch 230 forms the outer shape of the clutch 230 and includes a clutch housing 231 that is fastened to the lower surface of the water storage tank 120 , and is located in the center of the clutch housing 231 and extends into the water storage tank 120 . and an upper washing shaft 232a fastened to the rotary blade 136, and an upper dewatering shaft 233a that is coaxial with the upper washing shaft 232a, passes through the water storage tub 120 and is fastened to the rotary tub 130, and , a lower washing shaft 232b receiving the rotational force of the motor from the power transmission unit 240, a lower spin-drying shaft 233b coaxial with the lower washing shaft and connected to the upper spin-drying shaft, and an upper spin-drying shaft 233a Gear parts 234a and 234b formed between and the lower washing shaft 233b to reduce the rotational force of the lower washing shaft and transmit it to the upper washing shaft, and a spring connecting the lower washing shaft 232b and the lower spin-drying shaft 233b It includes a block 236 and a brake assembly that works with the drain valve 154 and simultaneously operates the clutch spring 237 of the spring block 236 and restricts the rotation of the upper/lower dehydration shaft 233b.

Here, the upper dewatering shaft 233a for rotating the rotating tub 130 is directly connected to the rotating tub 130 and connected to the upper dewatering shaft 233a and the upper dewatering shaft 120 for rotating the rotating tub 130, The tubular drum 235 with teeth formed on the lower inner circumferential surface, and the lower dewatering shaft 233b are connected to the lower end of the drum 235 in which the gear parts 234a and 234b are formed to remove the rotational force of the BLDC motor 220 from the upper part. It passes to the contraction 233a.

On the other hand, the upper end of the upper dewatering shaft (233a) is coupled to the lower connection portion of the rotary tub 130 to transmit the rotational force of the BLDC motor 220 to the rotary tub (130). For example, the upper end of the upper dehydration shaft 233a is formed in an octagonal shape to efficiently transmit the rotational force to the rotating tub 130 . The upper de-contraction (233a), the drum 235, and the lower de-contraction (233b) are coupled to each other by an interference fit.

And in order to support the rotation of the upper spin-drying shaft 233a, a bearing is installed between the upper spin-drying shaft 233a and the upper washing shaft 232a. And a protrusion is formed in the upper washing shaft 232a in order to be fixed to the upper washing shaft 232a at a constant height.

Meanwhile, a plurality of planetary gears 234a are installed on the inner peripheral surface of the drum 235 to reduce the rotation speed of the BLDC motor while transmitting power to the upper washing shaft 232a. The planetary gear 234a has a hole penetrated in the longitudinal direction of the center, and a shaft connected to the carrier 235a is coupled to each hole to support the planetary gear 234a and rotate at the same time.

And the planet gear 234a is engaged with the sun gear 234b to be described later between the carriers 235a for supporting the upper/lower portions of the shaft to rotate and revolve along the outer peripheral surface of the sun gear 234b. That is, since the planet gear 234a and the drum 235 rotate at the same time during dehydration, the planet gear 234a rotates around the sun gear 234b and revolves at the same time. Here, a rounded octagonal groove is formed on the upper portion of the carrier 235a to match the lower end of the upper washing shaft 232a.

Meanwhile, the lower washing shaft 232b for transmitting the power of the BLDC motor to the planetary gear 234a is coupled to the inside of the lower dewatering shaft 233b. A bearing is inserted between the lower washing shaft 232b and the lower dewatering shaft 233b to support the lower washing shaft 232b to rotate smoothly. In addition, a sun gear 234b is formed at the upper end of the lower washing shaft 232b to be engaged with the planetary gear 234a to transmit the power of the lower washing shaft 232b to the planetary gear 234a. Here, the power generated from the BLDC motor may be transmitted through the lower washing shaft 232b in the order of the sun gear 234b, the planetary gear 234a, the carrier 235a, and the upper washing shaft 232a.

In addition, the clutch housing 231 composed of the upper clutch housing 231a and the lower clutch housing 231b is screwed on the lower part of the upper dehydration shaft 233a, the drum 235, and the upper part of the lower dehydration shaft 233b. combined to form The clutch housing 231 serves to protect the drum 235 and is coupled to the upper/lower dewatering shafts 233a and 233b through a bearing to support the upper/lower dewatering shafts 233b. In addition, the clutch housing 231 is coupled to the mounting plate 210 fixed to the lower portion of the water storage tub 120 of the laundry treatment apparatus 100 to fix the components inside the clutch housing 231 .

Meanwhile, a brake assembly for restricting rotation of the drum 235 by penetrating through the lower clutch housing 231b and protruding to the outside of the clutch housing 231 is provided on a side surface of the lower clutch housing 231b.

Here, the brake assembly restricts the rotation of the drum when only the upper/lower washing shafts 232a and 232b need to rotate during washing and when the upper/lower washing shafts 233a and 233b need to be temporarily stopped during spin-drying.

In addition, the brake assembly includes a brake lever 238 operated by a separate actuator (not shown), and a through shaft connecting the upper clutch housing 231a, the brake lever 238, and the lower clutch housing 231b through and connecting them. (238a), a brake spring (238b) coupled to the through shaft (238a) to give elasticity of the brake lever (238), a brake band (238c) connected to the brake lever (238) and applying the brake of the drum (235) ) is included.

On the other hand, the actuator that operates the brake lever 238 may be operated by a multi-stage operation. That is, the brake assembly may be controlled by an operation in which the actuator pulls and returns the brake lever 238 of the brake assembly while performing the first or second stage operation.

Here, when the actuator does not operate, that is, in an off state, the brake band 238c of the brake assembly is contracted to surround and restrain the drum 235 . However, when the actuator performs the first or second stage operation, the brake band 238c is relaxed, and the drum 235 is released from the brake band 0 to allow free rotation.

On the other hand, when the drum 235 is restrained by the brake band 238c, the upper/lower dehydration shafts 233a and 233b are also restrained, and the rotation of the rotating tub 130 is restrained. However, when the drum 235 is released from the restraint, the upper/lower dewatering shafts 233a and 233b are freely rotatable, so that the rotating tub 130 is also freely rotatable.

On the other hand, the drain valve 154 interlocked by the brake lever 238 is located on the side of the actuator. The actuator may simultaneously control the drain valve 154 in conjunction with the operation of the brake lever 238 . Here, the drain valve and the brake lever are connected by a separate connection link, and the connection link is interlocked according to the operation of the brake lever of the actuator, and the drain valve is interlocked to operate.

Hereinafter, the power transmission unit 240 will be described in detail with reference to the accompanying FIGS. 5 to 6 .

5 is a plan view illustrating a power transmission unit of the driving device according to the present invention, and FIG. 6 is a cross-sectional view showing the power transmission unit of the driving device according to the present invention.

As shown, the power transmission unit 240 transmits the rotational force of the rotating shaft 226 of the BLDC motor 220 to the lower washing shaft 232b of the clutch 230 at a predetermined reduction ratio. The power transmission unit 240 includes a motor pulley 241 provided on the rotating shaft 226 of the BLDC motor 220 , and a clutch pulley 244 and a motor pulley provided on the lower washing shaft 232b of the clutch 230 . It is provided with a multi-groove belt 246 connecting the 241 and the clutch pulley 244 .

Here, the multi-groove belt 246 is to transmit the rotational force of the motor pulley 241 to the clutch pulley 244 , is formed of a belt having a predetermined elastic force, and is an inner surface of the multi-groove belt 246 , that is, the motor. On the surface in contact with the pulley 241 and the clutch pulley 244 , a plurality of V-grooves forming a 'V' shape in cross section along the longitudinal direction of the multi-groove belt 246 in order to improve frictional force with the motor pulley 241 (246a) is formed. Here, in the case of the V-groove 246a formed in the multi-groove belt 246, the number is not limited, but preferably 5 to 7 V-groove 246a may be formed.

Here, the motor pulley 241 is provided on the rotation shaft 226 of the BLDC motor 220 and is for transmitting the rotational force of the rotation shaft 226 of the BLDC motor 220 to the multi-groove belt 246 . A plurality of V protrusions 242a are formed on the outer peripheral surface of the motor pulley 241 to form an inverted 'V' shape in cross section to be inserted into a plurality of V grooves 246a formed in the multi-groove belt 246, Each V protrusion 242a may be inserted into the V-groove 246a of the multi-groove belt 246 to increase frictional force with the multi-groove belt 246 .

Here, in the case of the V protrusions 242a formed on the motor pulley 241, it is preferable to be formed to correspond to the number of V grooves 246a formed in the multi-groove belt 246. In addition, a pair of separation prevention protrusions 243 for guiding the outermost side of the multi-groove belt 246 may be further formed at both outermost ends of the V protrusion 242a. These separation prevention protrusions 243 prevent the separation of the multi-groove belt 246 by guiding both sides of the multi-groove belt 246 rotated along the motor pulley 241 when the motor pulley 241 rotates.

The clutch pulley 244 is provided on the lower washing shaft 232b of the clutch 230 to receive rotational force transmitted through the multi-groove belt 246 . The clutch pulley 244 has an outer peripheral surface formed in a planar shape in contact with the surface of the multi-groove belt 246 . That is, the outer circumferential surface of the clutch pulley 244 is not inserted into the V-groove 246a of the multi-groove belt 246, but comes in contact with the inner surface of the multi-groove belt 246 in which the V-groove 246a is formed. 246) is transmitted.

Here, when the outer circumferential surface of the clutch pulley 244 is formed in a flat shape, the diameter of the clutch pulley 244 is formed relatively larger than the diameter of the motor pulley 241, so that a relatively large friction force is formed compared to the motor pulley 241. because it can In addition, when the motor pulley 241 and the clutch pulley 244 of the multi-groove belt 246 are mounted, the multi-groove belt 246 must be mounted with a predetermined tension to the motor pulley 241 and the clutch pulley 244 . This is because, when V grooves are formed in both the motor pulley 241 and the clutch pulley 244 , it is very difficult to mount the multi-groove belt 246 . That is, when the multi-groove belt 246 is mounted, in a state in which one side of the multi-groove belt 246 is first mounted on the motor pulley 241 , the other side of the multi-groove belt 246 contacts the outer peripheral surface of the clutch pulley 244 and does not slide. can be installed in the form of

On the other hand, the width of the outer peripheral surface of the clutch pulley 244 is preferably formed to be wider than the width of the multi-groove belt 246 , and at one end of the outer peripheral surface of the clutch pulley 244 , the multi-groove belt is formed to one side of the clutch pulley 244 . A separation prevention rib 245 for preventing separation may be further formed.

Accordingly, the operations of the clothes processing apparatus and the driving device of the clothes processing apparatus according to an embodiment of the present invention will be described in detail through examples. Each element mentioned below should be understood with reference to the above description and drawings.

Meanwhile, the present invention relates to a control method of the clothes processing apparatus 100, and detailed descriptions of the washing, rinsing, and dehydrating operations of the clothes processing apparatus will be omitted, and the driving device during the washing, rinsing and dewatering operations. The operation of 200 and the belt separation detection process of the driving device 200 will be described in detail.

The driving device 200 as described above operates as follows during the washing cycle, the rinsing cycle, and the dehydration cycle. First, when the brake lever 238 is operated in the pushing direction during washing, the clutch spring 237 linked to the brake lever 238 is twisted in the direction in which the diameter is expanded.

Accordingly, the clutch spring 237 with an increased diameter is maintained spaced apart from the outer circumferential surface of the spring block 236 . Here, the rotational force of the BLDC motor 220 is transferred from the motor pulley 241 to the clutch pulley 244 provided on the lower washing shaft 232b by the multi-groove belt 246 .

On the other hand, the rotational force transmitted to the clutch pulley 244 of the lower washing shaft 232b is transmitted from the upper washing shaft 232a to the rotary blade 136 through the lower washing shaft, and simultaneously with the rotation of the rotary blade 136, the carrier 235a ) to rotate the rotating tub 130 in the opposite direction to the rotation of the rotating blades 136 while being decelerated by the .

In addition, when the brake lever 238 is operated in the pulling direction during dehydration, the clutch spring 237 linked to the brake lever 238 is twisted in the direction in which the diameter is reduced.

Accordingly, when the diameter of the clutch spring 237 is reduced, the clutch spring 237 engages the lower dehydration shaft 233b and the spring block 236 at the same time by the restoring force of the reduced diameter.

On the other hand, when the lower washing shaft 232b receiving the power of the BLDC motor 220 rotates, the lower washing shaft 232b and the fixed spring block 236 rotate like the lower washing shaft 232b. At this time, the clutch spring 237 engaging the spring block 236 and the lower dehydration shaft 233b receives rotational force in the winding direction. Here, by the rotational force of the clutch spring 237, the spring block 236 and the lower dehydration shaft 233b are connected with a stronger force. And it is possible to rotate the drum 235 and the planetary gear 234a integrally by the coupling force of the spring block 236 and the lower dehydration shaft 233b. Therefore, during dehydration, not only the rotary blades 136 but also the rotary tub 130 can be rotated at high speed in the same direction to proceed with dehydration.

Hereinafter, a method for detecting belt separation of a clothes processing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

7 is a flowchart illustrating a control process of the clothes processing apparatus according to the present invention, and FIGS. 8 to 10 are graphs showing rpm changes of the motor and the clutch of the clothes processing apparatus according to the present invention.

Here, FIG. 8 is a graph showing the rpm change of the motor and the clutch in a steady state, FIG. 9 is a graph showing the rpm change of the motor and the clutch in the belt detachment state, and FIG. 10 is the rpm change of the motor and the clutch in the belt slip state is a graph showing

On the other hand, in the case of the driving device 200 of the present invention, the inner rotor type BLDC motor 220 is used. A change in rotational speed will occur.

Accordingly, the control unit continuously detects the rotation speed of the BLDC motor 220 when the driving device 200 is driven, and compares the sensed rotation speed and the set rotation speed to determine the normal operating state of the driving device 200 . .

In addition, in the case of the control method of the present invention, whether the multi-groove belt of the power transmission unit provided in the driving device 200 of the clothes processing apparatus 100 operates normally can be determined by sensing the rotation speed of the BLDC motor 220 . .

On the other hand, in the case of the control method of the present invention, in the washing process of the washing machine including the washing cycle, the rinsing cycle, and the dehydration cycle, the laundry weight sensing step of sensing the laundry amount of the laundry may be performed in order to perform the washing cycle. Therefore, detailed descriptions of the overall processes of the washing cycle, rinsing cycle, and dehydration cycle will be omitted, and the separation and slip detection of the multi-groove belt of the power transmission device will be described in detail in the laundry weight sensing step.

Hereinafter, as shown in FIG. 7 , a method for detecting belt separation and slip of a driving device according to an embodiment of the present invention will be described.

When an operation signal of the clothes processing apparatus 100 is input by the user, the control unit applies a current to the BLDC motor 220 to set the amount of dry laundry stored in the rotating tub to the rotating tub 130 or rotating blades 136 . is rotated by accelerating at a set time and a set rotation speed in one or both directions (step S110).

Here, the BLDC motor 220 sets the rotation speed of the rotating tub 130 according to the amount of laundry stored in the rotating tub 130 by power input at the time of initial start-up to a first target rpm (about 40 to 50 rpm, preferably is gradually increased until it increases to 46 rpm), and when the first target rpm is reached, a constant rpm is maintained (step S120).

Here, as the BLDC motor 220 rotates at the first target rpm, the controller may intermittently or continuously detect the rotation speed of the BLDC motor 220 at regular intervals or until the first target rpm is satisfied. Accelerate the motor repeatedly.

Thereafter, the control unit sets the rotational speed of the BLDC motor 220 from the first target rpm to a second target rpm lower than the first target rpm ( The speed of the BLDC motor 220 is reduced to about 25 to 35 rpm, preferably 30 rpm (step S130).

On the other hand, the control unit intermittently or continuously detects the rotation speed of the BLDC motor 220 at regular intervals in decelerating the rotation speed of the BLDC motor 220 to the second target rpm, the power of the power transmission unit 240 The delivery status can be detected.

Meanwhile, the rpm of the BLDC motor 220 and the rpm of the clutch when the BLDC motor 220 is decelerated to the second target rpm are as shown in FIG. 8 . As shown, when the BLDC motor 220 is decelerated from the first target rpm to the second target rpm, the BLDC motor is decelerated from the first target rpm to the second target rpm, and the clutch 230 is connected to the clutch 230 . Inertial rotation proceeds according to the rotating tub 130 and the weight of laundry stored in the rotating tub 130 , and the rpm of the clutch 230 is decelerated to have a predetermined inclination according to the inertial rotation of the clutch 230 . become

That is, as shown in FIG. 8 , when the rpm deceleration of the BLDC motor 220 and the rpm deceleration of the clutch 230 proceed, it may be determined that the belt of the power transmission unit 240 operates normally.

Meanwhile, the control unit may determine whether the belt of the power transmission device is detached in decelerating the rotation speed of the BLDC motor to the second target rpm. That is, when the rotation speed sensed by the BLDC motor is higher than the first set rpm when the BLDC motor decelerates to the second target rpm, the belt detachment of the power transmission device may be detected.

Here, the controller compares the rotation speed of the BLDC motor 220 sensed in decelerating the rotation speed of the BLDC motor 220 to the second target rpm with a first set rpm (about 90 to 110 rpm, preferably 100 rpm). It is possible to determine the separation of the multi-groove belt 246 of the power transmission unit 240 (step S140).

That is, as shown in FIG. 9 , when the multi-groove belt 246 of the power transmission unit 240 is detached in decelerating the rotation speed of the BLDC motor 220 from the first target rpm to the second target rpm, the BLDC motor At the same time as the rotation speed sensed at 220 is rapidly increased (diverges), a shape in which the rotation speed of the clutch 230 is rapidly increased due to inertial rotation occurs.

Accordingly, the control unit determines that the multi-groove belt 246 of the power transmission unit 240 is separated from the motor pulley 241 or the clutch pulley 244 when the rotation speed sensed by the BLDC motor 220 exceeds the first set rpm. It can be determined that it has been done (step S141).

Here, when it is determined that the multi-groove belt 246 of the power transmission unit 240 is detached, the control unit stops the operation of the BLDC motor, and displays that the belt of the power transmission device is detached through the separately provided control panel 116 . It can be done (step S143).

Thereafter, the control unit determines whether the rotation speed of the BLDC motor 220 is normally decelerated to the first target rpm. That is, it is determined whether the rotation speed of the detected BLDC motor is equal to or smaller than the second set rpm (about 25 to 35 rpm, preferably 30 rpm), and when the rotation speed sensed by the BLDC motor is greater than the second set rpm, the second The deceleration to the target rpm is repeatedly performed (step S150).

Here, when the detected rotational speed rpm of the BLDC motor is less than or equal to the second set rpm, the rotational speed of the BLDC motor 220 is maintained at the second target rpm and the current of the BLDC motor 220 is sensed inside the rotating tub. The laundry amount of the stored laundry is sensed. (Step S160)

On the other hand, the laundry weight detection compares the detected amount and the set amount of cloth to determine the occurrence of belt slip of the power transmission unit. When the amount of laundry is smaller than the set amount, the belt slip of the power transmission unit is determined (step S170).

Here, the reason for determining the belt slip of the power transmission unit 240 when the detected amount of cloth is smaller than the set amount is that when slip occurs in the belt of the power transmission unit 240, the amount of detected cloth is relatively small. Because.

Meanwhile, when slip occurs in the belt of the power transmission unit, the rpm of the BLDC motor 220 and the rpm of the clutch are as shown in FIG. 10 . As shown, when the BLDC motor 220 is decelerated from the first target rpm to the second target rpm, the BLDC motor 220 is decelerated from the first target rpm to the second target rpm, and the clutch 230 is the clutch 230 ), inertial rotation proceeds according to the weight of the laundry stored in the rotary tub 130 and the rotary tub 130 .

Here, the rpm of the clutch 230 according to the inertia rotation is decelerated as a wave is formed as the slip of the multi-groove belt 246 occurs. Accordingly, it is possible to detect the occurrence and number of belt slips of the power transmission unit 240 according to the wave generated at the rpm of the clutch 230 .

On the other hand, when it is confirmed that the detected amount of cloth is greater than the set amount of cloth, the control unit detects the number of occurrences of the slip phenomenon occurring in the clutch 230 when the BLDC motor 220 is decelerated from the first target rpm to the second target rpm, and detects a predetermined number of occurrences. If more than the number of times is detected, it is determined that slip has occurred in the belt of the power transmission device. It is determined that it has occurred and the clothes dispersion of the laundry can be performed again (step S171).

Here, when the number of occurrences of the slip phenomenon occurring in the clutch 230 when the BLDC motor 220 is decelerated from the first target rpm to the second target rpm is sensed more than a predetermined number of times, the controller controls the power transmission unit 240 . If it is determined that slip has occurred in the multi-groove belt 246, or if the laundry is redistributed according to the belt slip determination, it is determined that the belt slip has occurred if the cloth distribution process is repeated at least three times, The washing cycle is switched to the washing cycle according to the sleep mode (step S173).

In addition, when the BLDC motor 220 is decelerated from the first target rpm to the second target rpm, the number of occurrences of the slip phenomenon occurring in the clutch 230 is excessively large or the occurrence range is excessively wide (that is, when the , when the washing operation cannot be performed due to a slip phenomenon) It can be displayed that the washing operation cannot be performed due to the belt slip of the power transmission unit 240 through a separately provided control panel 116 .

Thereafter, the control unit sets the amount of dry laundry according to the table in which the amount of dry cloth is set corresponding to the detected amount and set amount by using the sensed amount and the set amount of cloth (S175), and performs a washing operation according to the sleep mode according to the set amount of dry cloth do (step S177). Here, in the washing cycle according to the sleep mode, the rotation speed of the BLDC motor 220 is made to be relatively lower than that of the washing cycle according to the general mode, so that slip occurs in the multi-groove belt 246 of the power transmission unit 240 . it can be prevented

On the other hand, when the detected amount of cloth is greater than the set amount of laundry in the above-described detection of the amount of laundry (step S170), the control unit sets the amount of dry laundry as the detected amount of cloth (S180), and proceeds with the washing cycle in the normal mode according to the set amount of dry cloth do (step S190).

Although the preferred embodiment of the present invention has been described in detail as described above, those of ordinary skill in the art to which the present invention pertains, without departing from the spirit and scope of the present invention as defined in the appended claims The present invention may be practiced with various modifications. Accordingly, modifications of future embodiments of the present invention will not depart from the teachings of the present invention.

100: clothes processing unit 110: case
120: water tank 130: rotating tank
140: water supply 150: drain unit
200: driving unit 210: mounting plate
220: BLDC motor 230: clutch

Claims (11)

A control method for a clothes processing apparatus including a BLDC motor and a driving device including a belt and a pulley for transmitting power of the BLDC motor to a clutch, the control method comprising:
accelerating the BLDC motor to a first target rpm by applying a current to the BLDC motor;
decelerating the rotation speed of the BLDC motor to a second target rpm;
detecting the rotation speed of the BLDC motor and comparing it with a first set rpm higher than the first target rpm;
sensing the amount of raisins by maintaining the rotation speed of the BLDC motor at the second target rpm;
Including the step of performing a washing cycle according to the detected amount of raisins,
When the detected rotation speed of the BLDC motor is higher than a first set rpm, it is determined that the belt is separated from the pulley, and when the rotation speed of the BLDC motor is lower than the first set rpm, the washing cycle is performed,
determining whether a slip phenomenon has occurred between the belt and the pulley according to the detected amount of cloth detected in the step of detecting the amount of dry laundry; A control method of a clothes processing apparatus, characterized in that it proceeds by switching to. The method of claim 1, wherein detecting the amount of raisins comprises:
The method of claim 1, wherein the amount of current of the BLDC motor is sensed by maintaining the rotation speed of the BLDC motor at the second target rpm. The method according to claim 1, wherein when it is determined that the belt is detached from the pulley, the BLDC motor is stopped. The method according to claim 1, further comprising: displaying to a user when it is determined that the belt is detached from the pulley. delete delete The method according to claim 1, wherein the first target rpm is 40 to 50 rpm, the second target rpm is 25 to 35 rpm, and the first set rpm is 90 to 110 rpm. The method of claim 1, wherein the driving device is
and a clutch receiving the rotational force of the BLDC motor and selectively transmitting the rotational force, and a power transmitting unit transmitting the rotational force of the BLDC motor to the clutch. The motor pulley according to claim 8, wherein the power transmission unit connects a motor pulley installed on the rotation shaft of the BLDC motor, a clutch pulley mounted on the rotation shaft of the clutch, and the motor pulley and the clutch pulley, and connects the motor pulley and the clutch pulley A method of controlling a clothes processing apparatus, comprising: a belt having a plurality of V-shaped grooves formed on an inner surface in contact with the . 10. The method of claim 9, wherein a plurality of V protrusions inserted into the V grooves of the belt are formed on an outer circumferential surface of the motor pulley, and the clutch pulley is formed of a flat pulley. 10. The method of claim 9, Among the plurality of V projections formed on the outer circumferential surface of the motor pulley, both sides of the belt in the width direction are more protruding than the V projections inserted into the V groove to prevent separation of the belt is further A method of controlling a clothes processing apparatus, characterized in that formed.

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