KR102454763B1 - cleaner - Google Patents

Abstract

The present invention relates to a vacuum cleaner. In a vacuum cleaner according to an embodiment of the present invention, the cleaner includes an input unit for inputting a first mode or a second mode, a fan motor, and when the first mode is set, rotates the fan motor in a first direction to generate suction force and a control unit for controlling the fan motor to rotate in the second direction to generate a split output when the second mode is set. Accordingly, it is possible to generate a suction force and a split output using one fan motor.

Description

cleaner {cleaner}

The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner capable of generating suction and ejection power using a single fan motor.

In general, among vacuum cleaners, a vacuum cleaner is a device that uses a suction force generated by an operation of a suction motor mounted inside a main body to suck in foreign substances such as air and dust, and then filters the foreign substances and stores them in a dust container.

In particular, through the suction nozzle, dust and foreign substances on the surface to be cleaned are sucked by the suction force generated by the cleaner body, and the foreign substances are transferred to the cleaner body through a connection pipe, then filtered, and the foreign substances are stored in the dust container.

Meanwhile, for user convenience, a hands-free function is mounted on the vacuum cleaner.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vacuum cleaner capable of generating suction and ejection power using a single fan motor.

In order to achieve the above object, a cleaner according to an embodiment of the present invention includes an input unit for inputting a first mode or a second mode, a fan motor, and when the first mode is set, the fan motor rotates in a first direction and a control unit that controls to generate a suction force and, when set to the second mode, rotates the fan motor in a second direction to control to generate a split output.

Meanwhile, a cleaner according to another embodiment of the present invention for achieving the above object includes an input unit for inputting a first mode or a second mode, a fan motor, and, when set to the first mode, the fan motor as a first and a control unit for controlling the rotation in the direction to generate suction force, and controlling the fan motor to repeat the rotation in the second direction and the rotation in the first direction when the second mode is set.

According to an embodiment of the present invention, the cleaner includes an input unit for inputting a first mode or a second mode, a fan motor, and when the first mode is set, control the fan motor to rotate in a first direction to generate suction force and, when set to the second mode, includes a control unit for controlling the fan motor to rotate in the second direction to generate a split output, so that suction power and split power can be generated using one fan motor.

On the other hand, when the control unit is set to the third mode through the input unit, the control unit controls the fan motor to repeat the rotation in the second direction and the rotation in the first direction so that foreign substances that are not smoothly sucked fly by the ejection force and then immediately suck By allowing it to be sucked by the vacuum cleaner, the performance of the cleaner can be improved.

In particular, in the third mode operation, when the distance between the main body and the connection part is increased, the fan motor is rotated in the second direction to generate a split power, and when the distance between the main body and the connection part is decreased, the fan motor is removed. By rotating in one direction to generate a suction force, the performance of the cleaner may be improved.

Meanwhile, according to another embodiment of the present invention, the cleaner includes an input unit for inputting a first mode or a second mode, a fan motor, and when the first mode is set, rotate the fan motor in a first direction to increase the suction power. By including a control unit for controlling the fan motor so that rotation in the second direction and rotation in the first direction are repeated when the second mode is set, suction power and branch output can be generated using one fan motor there will be

1 is a perspective view illustrating a cleaner according to the present invention.
FIG. 2 is a view illustrating an ultrasonic sensor disposed near the handle of FIG. 1 and an ultrasonic sensor disposed on the body.
FIG. 3 illustrates calculating the distance between the main body and the connection part of FIG. 1 .
FIG. 4 is a block diagram schematically illustrating the inside of the cleaner shown in FIG. 1 .
5 is a circuit diagram illustrating a fan driving unit of the cleaner of FIG. 4 .
6A to 9B are diagrams referenced for explaining the operation of the cleaner of FIG. 1 .

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The suffixes "module" and "part" for the components used in the following description are given simply in consideration of the ease of writing the present specification, and do not impart a particularly important meaning or role by themselves. Accordingly, the terms “module” and “unit” may be used interchangeably.

1 is a perspective view illustrating a cleaner according to the present invention.

Referring to the drawings, the cleaner 100 according to the present invention includes a main body 130 , wheels 176 and 177 for moving the main body 130 , a dust container 140 , a suction port 110 , and a connection part 120 . ) is provided. In addition, it may further include a handle 115 formed on the connection unit 120 , and an input unit 117 formed near the handle 115 .

The main body 130 includes a fan ( 142 in FIG. 4 ) and a fan drive unit ( 143 in FIG. 4 ) for driving the fan, and generates suction force by rotation of the fan ( 141 in FIG. 5 ).

In particular, when the fan motor ( 141 in FIG. 5 ) in the fan driving unit rotates forward, a suction force is generated. The generated suction force is transmitted to the connection part 120 connected to the main body 130 , and finally, to the suction port 110 connected to the connection part 120 .

Accordingly, the vacuum cleaner 100 can suck in foreign substances around the suction port 110 , and is stored in the dust container 140 that is detachably attached to the main body 130 through the connection part 120 .

In this case, a filter for filtering inhaled foreign substances may be further provided between the dust bin 140 and the connection part 120 , and the dust bin 140 may store the filtered foreign substances.

On the other hand, the connection part 120 is connected to the main body 130, the flexible connection pipe 124, the length of which can be adjusted, the extension pipe 122 is connected between the connection pipe 124 and the suction port (110). ) can be provided.

Meanwhile, a handle 115 and an input unit 117 may be formed on the extension tube 1220 .

Meanwhile, in the present invention, the fan motor ( 141 in FIG. 5 ) can be driven in a first mode for rotating in a first direction and a second mode for rotating in a second direction opposite to the first direction.

According to the first mode, the suction force is generated, and the foreign material is sucked through the suction port 110 . The second mode is a blower mode, and according to the second mode, ejection force is generated, and the wind blows in an external direction of the suction port 110 . That is, it is possible to induce the surrounding foreign substances to fly in the opposite direction of the main body.

In particular, in the present invention, by using one fan motor (141 in FIG. 5 ) to generate suction or branching power, there are advantages in manufacturing cost and space arrangement, such as not having to use two motors.

Meanwhile, in the present invention, in addition to the first mode and the second mode, a third mode in which the second direction rotation and the first direction rotation of the fan motor ( 141 in FIG. 5 ) are alternately repeated is also described as possible.

According to the third mode, since the second direction rotation and the first direction rotation are possible, foreign substances adhering to the carpet or the like are scattered in the opposite direction to the main body 130 by the blower function, and the suction force generated instantaneously By, again, it is sucked through the suction port 110 . Accordingly, even strongly attached foreign substances can be easily sucked into the main body 130 by the third mode.

On the other hand, the first mode to the third mode can be selected by operation in the input unit 117 . To this end, the first mode button, the second mode button, and the third mode button in the input unit 117 may be separately provided.

On the other hand, the cleaner 100 in the present invention can be driven by receiving AC power through the cord line 105 and the power cord 107, and further comprising a battery (not shown), When power is not input, the vacuum cleaner may be operated even with battery power.

When the cleaner 100 operates with AC power, it may be called an AC power operation mode, and when the cleaner 100 operates with DC power, it may be called a DC power operation mode.

On the other hand, in the DC power supply operation mode, it is possible to reduce the power consumption of the battery.

Specifically, the main body 130 drives the fan 142 based on the battery 230, the fan 142 that generates suction force by rotation, and the AC power input when operating in the AC power mode, and the DC power supply A fan driving unit 143 for driving the fan 142 based on the DC power stored in the battery 230 when operating in mode is provided, and the fan driving unit 143 includes a distance between the main body 130 and the connecting unit 120 In proportion to , the output or speed of the fan motor 141 for driving the fan 142 may be varied. Accordingly, power consumption of the battery 230 can be reduced.

In particular, as the distance between the main body 130 and the main body 120 increases, the motor output or motor speed for driving the fan increases, and as the distance between the main body 130 and the main body 120 decreases, the fan is driven By reducing the motor output or motor speed, it is possible to reduce power consumption of the battery 230 .

FIG. 2 is a diagram illustrating an ultrasonic sensor disposed near the handle of FIG. 1 and an ultrasonic sensor disposed on the main body 130 .

Referring to the drawings, the cleaner 100 may use an ultrasonic sensor to sense the distance between the connection part 120 and the main body 130 .

To this end, as shown in FIG. 2A , a first ultrasonic sensor 320a may be disposed near the handle 11 disposed on the connection part 120 .

In addition, second to third ultrasonic sensors 320b and 320c may be disposed at the rear of the main body 130 , and a fourth ultrasonic sensor 320c may be disposed at the front of the main body 130 .

Each of the ultrasonic sensors 320a, ..., 320d may include an ultrasonic output unit (not shown) and an ultrasonic receiver (not shown), respectively, and, for example, a first ultrasonic sensor disposed in the connection unit 120 . The second to fourth ultrasonic sensors 320b, ..., 320d) disposed on the main body 130 receive the ultrasonic waves output from the 320a, and the distance between the connecting part 120 and the main body 130 is received. can detect

FIG. 3 illustrates calculating the distance between the main body and the connection part of FIG. 1 .

Referring to the drawings, when the user 300 performs cleaning while pushing the handle 115 , foreign substances are transferred to the dust container 140 in the body 130 through the suction port 110 and the connection part 120 . do.

Meanwhile, as shown in FIG. 2 , the second to fourth ultrasonic sensors 320b , ..., 320d arranged on the main body 130 receive ultrasonic waves output from the first ultrasonic sensor 320a disposed on the connection unit 120 . )), the distance Dis between the connection part 120 and the main body 130 may be sensed.

In particular, the controller 310 may calculate a distance between the connection unit 120 and the main body 130 based on the received ultrasound signal.

FIG. 4 is a block diagram schematically illustrating the inside of the cleaner shown in FIG. 1 .

Referring to the drawings, the cleaner 100 of FIG. 4 may include a fan 142 , a fan driving unit 143 , a battery 230 , and a control unit 310 . In addition, the cleaner 100 includes an AC power detection unit 315 , a sensor unit 320 , a communication unit 330 , a traveling unit 144 , a traveling driving unit 145 , and an input unit 117 , and a flow switch 1120 . may further include.

The flow path switch 112 is disposed between the dust container 140 and the fan motor 141 , and in the first mode in which suction force is generated, the first flow guide part 905 is opened, and the second flow guide part 907 is The second flow path guide unit 907 may be opened and the first flow path guide unit 905 may be closed in the second mode in which the operation is closed and the ejection force is generated.

Meanwhile, the flow path switch 112 may operate such that the first flow path guide part 905 and the second flow path guide part 907 are alternately opened in the third mode.

The controller 310 may control the operation of the flow path switch 112 according to a mode.

The input unit 117 may include a plurality of operation buttons, and may transmit input signals such as operation on/off of the cleaner 100 and adjustment of a fan rotation speed by a user operation to the control unit 310 .

Meanwhile, the input unit 117 may include a first mode button to a third mode button for selecting the first mode to the third mode.

When AC power is input to the inside of the cleaner 100 , the AC power detection unit 315 detects the AC power input. To this end, the AC power detection unit may include an AC current detection unit or an AC voltage detection unit.

As the AC power detection unit, a current transformer (CT), a shunt resistor, or the like may be used, and as the AC voltage detection unit, a voltage transformer (VT), a shunt resistor, or the like may be used.

For example, when the power cord 107 of the cleaner 100 is connected to the power outlet, or when the power cord 107 is connected to the message outlet, the operation is input by the user's manipulation of the input unit 117 . In this case, AC power is input to the inside of the cleaner 100 , and the AC power detection unit 15 may detect whether AC power is input.

Meanwhile, when AC power is sensed, the detection signal may be transmitted to the controller 310 .

The sensor unit 320 may include an ultrasonic sensor or the like to detect a distance between the main body 130 and the connection unit 120 .

As described with reference to FIG. 2 , the sensor unit 320 includes a first ultrasonic sensor 320a disposed on the connection part 120 , and second to fourth ultrasonic sensors 320b , .. .320d) may be provided. Meanwhile, the signal sensed by the sensor unit 320 may be transmitted to the control unit 310 .

The communication unit 330 may wirelessly exchange data with a nearby external device. For example, a wireless communication unit (not shown) may be provided to enable wireless communication with an AP device (not shown). Here, the wireless communication unit (not shown) may perform WiFi communication. The communication unit 330 may perform wireless data communication with a mobile terminal (not shown) through an AP device (not shown).

The fan 142 rotates by the driving force of the fan motor 141 . To drive the fan 142 , a fan drive 143 is used.

The fan driving unit 143 transmits a rotational force to the fan 142 .

The fan driving unit 143 may drive the fan 142 based on the AC power input when operating in the AC power mode.

Meanwhile, the fan driver 143 may drive the fan 142 based on the DC power stored in the battery 230 when operating in the DC power mode. In this case, the fan driving unit 143 may vary the output of the motor driving the fan 142 in proportion to the distance between the main body 130 and the connection unit 120 . Thereby, it becomes possible to reduce the power consumption of the battery.

As the distance between the main body 130 and the connecting unit 120 increases, the fan driving unit 143 increases the motor output for driving the fan 142 , and the distance between the main body 130 and the connecting unit 120 decreases. As possible, the output of the motor driving the fan 142 may be reduced.

To this end, the fan driving unit 143 includes a converter ( 410 in FIG. 5 ) that converts AC power into DC power, and a switching unit ( FIG. 5 ) that outputs any one of DC power from the converter and DC power from the battery 230 . 5), an inverter (420 in FIG. 5) that includes a plurality of switching elements, converts the DC power output from the switching unit 415 into a predetermined AC power by a switching operation, and drives the fan 142 ) may be further included.

In addition, the fan driving unit 143 may further include an inverter control unit 430 , a current detection unit, and the like. The description of the fan driving unit 143 will be described in more detail with reference to FIG. 5 .

The traveling unit 144 may drive the vacuum cleaner. To this end, the driving unit 144 may include a left wheel 176 and a right wheel 177 shown in FIG. 1 . On the other hand, in order to drive the traveling unit 144 , the traveling driving unit 145 is used.

The traveling driving unit 145 may include a motor for transmitting rotational force to the traveling unit 144 , a motor control unit for controlling the motor, and the like.

In particular, the traveling driving unit 145 may transmit a rotational force to the traveling unit 144 based on the distance between the main body 130 and the connecting unit 120 .

For example, when the distance between the main body 130 and the connecting unit 120 is equal to or greater than the first distance, the driving driving unit 145 operates so that the main body 130 follows the connecting unit 120 , and the driving unit 144 . can transmit rotational force. Accordingly, the distance between the main body 130 and the connection part 120 is maintained within a predetermined distance.

The controller 310 may control each unit in the cleaner 100 , respectively.

When set to the first mode, the controller 310 controls the fan motor 141 to rotate in the first direction to generate suction force, and when set to the second mode, rotates the fan motor 141 in the second direction. It can be controlled so that the ejection power is generated.

When the third mode is set through the input unit 117 , the controller 310 may control the fan motor 141 to repeatedly rotate in the second direction and rotate in the first direction.

The control unit 310 controls the fan motor 141 to rotate in the second direction when the distance between the main body 130 and the connection unit 120 is increased during the third mode operation, and the main body 130 and the connection unit 120 are rotated in the second direction. When the distance between 120 is reduced, the fan motor 141 may be controlled to rotate in the first direction.

When the distance between the main body 130 and the connection part 120 is increased, the controller 310 may control the speed of the fan motor 141 to increase.

In the third mode operation, the controller 310 may control to sequentially increase the magnitude of the rotation speed during the second rotation, and may control the magnitude of the rotation speed to sequentially increase during the first rotation.

Meanwhile, the controller 310 may control the fan motor 141 to rotate in the first direction to generate a suction force, or control the fan motor 141 to rotate in the second direction and rotate in the first direction to repeat.

The control unit 310 controls the fan 142 to be driven based on the AC power input when operating in the AC power mode, and when operating in the DC power mode, the fan 142 based on the DC power stored in the battery 230 To drive the , the fan driving unit 143 or the fan 144 may be controlled. In this case, the control unit 310 controls the fan driving unit 143 or the fan 144 to vary the output of the motor driving the fan 142 in proportion to the distance between the main body 130 and the connection unit 120 . can do. Thereby, it becomes possible to reduce the power consumption of the battery.

The control unit 310 calculates the distance between the connection unit 120 and the main body 130 based on the first ultrasonic sensor 320a and the second to fourth ultrasonic sensors 20b, ... 320d. .

Then, the control unit 310 calculates the distance between the main body 130 and the connection unit 120, and operates the fan driving unit 143 to vary the output of the motor driving the fan 142 in proportion to the calculated distance. can be controlled

The controller 310 increases the motor output for driving the fan 142 as the distance between the main body 130 and the connecting unit 120 increases, and as the distance between the main body 130 and the connecting unit 120 decreases, , the fan driving unit 143 or the fan 144 may be controlled to reduce the motor output driving the fan 142 .

Meanwhile, the control unit 310 may control the driving driving unit 145 based on the distance between the main body 130 and the connecting unit 120 .

For example, when the distance between the main body 130 and the connecting unit 120 is greater than or equal to the first distance, the controller 310 may control the driving driving unit 145 so that the main body 130 follows the connecting unit 120 . can Accordingly, the distance between the main body 130 and the connection part 120 is maintained within a predetermined distance.

5 is a circuit diagram illustrating a fan driving unit of the cleaner of FIG. 4 .

Referring to the drawings, the fan driving unit 143 of the cleaner according to the embodiment of the present invention includes a converter 410, an inverter 420, an inverter control unit 430, a dc terminal voltage detection unit B, a smoothing capacitor ( C), and an output current detection unit (E). In addition, the fan driving unit 143 may further include an input current detection unit A, a reactor L, and the like.

The reactor L is disposed between the commercial AC power source 405, v _s and the converter 410, and performs power factor correction or step-up operation. In addition, the reactor L may perform a function of limiting the harmonic current caused by the high-speed switching of the converter 410 .

_The input current detection unit A may detect the input current is input from the commercial AC power source 405 . To this end, as the input current detection unit A, a current transformer (CT), a shunt resistor, or the like may be used. The detected input current i _s may be input to the inverter controller 430 as a discrete signal in the form of a pulse.

Meanwhile, the input current detection unit A may be the AC power detection unit 315 of FIG. 4 .

The converter 410 converts the commercial AC power supply 405 through the reactor L into a DC power supply and outputs it. Although the drawing shows the commercial AC power source 405 as a single-phase AC power source, it may be a three-phase AC power source. The internal structure of the converter 410 also varies according to the type of the commercial AC power source 405 .

Meanwhile, the converter 410 may be made of a diode or the like without a switching element, and may perform a rectification operation without a separate switching operation.

For example, in the case of a single-phase AC power supply, four diodes may be used in the form of a bridge, and in the case of a three-phase AC power, six diodes may be used in the form of a bridge.

Meanwhile, the converter 410 may be, for example, a half-bridge type converter in which two switching elements and four diodes are connected, and in the case of a three-phase AC power supply, six switching elements and six diodes may be used. .

When the converter 410 includes a switching element, a step-up operation, a power factor improvement, and a DC power conversion may be performed by a switching operation of the corresponding switching element.

The switching unit 415 is electrically connected to the converter 410 and the battery 230, and switches to output the DC power from the converter 410 in the AC power mode, and in the DC power mode, the battery ( 230) to output the DC power.

In the switching unit 415 , when the level of the AC power sensed by the AC power detection unit 315 is equal to or greater than a predetermined value, the switching unit 415 outputs the DC power from the converter 410 , and the AC power level is When the value is less than the predetermined value, the switching unit 415 outputs DC power from the battery 230 .

The smoothing capacitor C smoothes the input power and stores it. In the drawings, one device is exemplified as the smoothing capacitor C, but a plurality of devices may be provided to ensure device stability.

Meanwhile, since DC power is stored at both ends of the smoothing capacitor C, it may be referred to as a dc terminal or a dc link terminal.

The dc terminal voltage detector B may detect the dc terminal voltage Vdc that is both ends of the smoothing capacitor C. To this end, the dc terminal voltage detection unit B may include a resistance element, an amplifier, and the like. The detected dc terminal voltage Vdc may be input to the inverter controller 430 as a discrete signal in the form of a pulse.

The inverter 420 includes a plurality of inverter switching elements, and converts a DC power supply (Vdc) smoothed by an on/off operation of the switching elements into a three-phase AC power supply (va, vb, vc) of a predetermined frequency, three-phase It can output to the synchronous motor 141 .

That is, by the switching operation of the inverter 420 , the three-phase currents ia, ib, and ic can flow in the three-phase synchronous motor 141 that is a fan motor.

Inverter 420 is a pair of upper-arm switching elements (Sa, Sb, Sc) and lower-arm switching elements (S'a, S'b, S'c) connected in series with each other, and a total of three pairs of upper and lower arms The switching elements are connected to each other in parallel (Sa&S'a, Sb&S'b, Sc&S'c). A diode is connected in anti-parallel to each of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c.

The switching elements in the inverter 420 turn on/off the respective switching elements based on the inverter switching control signal Sic from the inverter controller 430 . Accordingly, the three-phase AC power having a predetermined frequency is output to the three-phase synchronous motor 141 .

The inverter controller 430 may control the inverter 141 based on the output current flowing through the fan motor 141 . That is, the inverter controller 430 may control the switching operation of the inverter 420 . To this end, the inverter control unit 430 may receive an output current i _o detected by the output current detection unit E .

The inverter controller 430 outputs the inverter switching control signal Sic to the inverter 420 in order to control the switching operation of the inverter 420 . The inverter switching control signal Sic is a pulse width modulation (PWM) switching control signal, and is generated and output based on the output current value i _o detected by the output current detection unit E .

To this end, the inverter control unit 430 includes an axis converting unit (not shown), a speed calculating unit (not shown), a current command generating unit (not shown), a voltage command generating unit (not shown), and an axis converting unit (not shown). , and a switching control signal output unit (not shown).

The axis conversion unit (not shown) receives the three-phase output current (ia, ib, ic) detected by the output current detection unit (E) and converts it into the two-phase current (iα, iβ) of the stationary coordinate system.

On the other hand, the axis conversion unit (not shown) may convert the two-phase currents (iα, iβ) of the stationary coordinate system into the two-phase currents (id, iq) of the rotational coordinate system.

)와 연산된 속도(

)를 출력할 수 있다.The speed calculating unit (not shown) is based on the two-phase currents (iα, iβ) of the stationary coordinate system changed by the axis converting unit (not shown), the calculated position (

) and the calculated speed (

) can be printed.

)와 속도 지령치(ω^* _r)에 기초하여, 전류 지령치(i^* _q)를 생성한다. 예를 들어, 전류 지령 생성부(미도시)는, 연산 속도(

)와 속도 지령치(ω^* _r)의 차이에 기초하여, PI 제어기(미도시)에서 PI 제어를 수행하며, 전류 지령치(i^* _q)를 생성할 수 있다. On the other hand, the current command generation unit (not shown), the calculation speed (

) and the speed command value (ω ^* _r ), a current command value (i ^* _q ) is generated. For example, the current command generation unit (not shown) may

) and the speed command value (ω ^* _r ), the PI controller (not shown) performs PI control, and the current command value (i ^* _q ) can be generated.

Next, the voltage command generation unit (not shown) includes the d-axis and q-axis currents (i _d ,i _q ) that are axis-transformed into the two-phase rotational coordinate system by the axis transformation unit, and the current from the current command generation unit (not shown), etc. Based on the command values (i ^* _d ,i ^* _q ), d-axis and q-axis voltage command values (v ^* _d ,v ^* _q ) are generated.

On the other hand, the generated d-axis and q-axis voltage command values (v ^* _d , v ^* _q ) are input to the axis conversion unit (not shown).

)와, d축, q축 전압 지령치(v^* _d,v^* _q)를 입력받아, 축변환을 수행한다.The axis conversion unit (not shown) is a position (not shown) calculated by the speed calculating unit (not shown).

) and d-axis and q-axis voltage command values (v ^* _d ,v ^* _q ) are received, and axis transformation is performed.

)가 사용될 수 있다.First, the axis transformation unit (not shown) performs transformation from a two-phase rotational coordinate system to a two-phase stationary coordinate system. At this time, the position calculated by the speed calculating unit (not shown) (

) can be used.

And, the axis transformation unit (not shown) performs transformation from the two-phase stationary coordinate system to the three-phase stationary coordinate system. Through this conversion, the axis conversion unit (not shown) outputs a three-phase output voltage command value (v ^* a, v ^* b, v ^* c).

A switching control signal output unit (not shown) outputs a switching control signal (Sic) for an inverter according to a pulse width modulation (PWM) method based on a three-phase output voltage command value (v ^* a,v ^* b, v ^* c) create and print

The output inverter switching control signal Sic may be converted into a gate driving signal by a gate driver (not shown) and input to a gate of each switching element in the inverter 420 . Accordingly, each of the switching elements Sa, S'a, Sb, S'b, Sc, and S'c in the inverter 420 performs a switching operation.

The output current detection unit E detects the output current i _o flowing between the inverter 420 and the three-phase motor 141 . That is, the current flowing through the motor 141 is detected. The output current detection unit E may detect all of the output currents ia, ib, and ic of each phase, or may detect the output currents of two phases using three-phase balance.

On the other hand, the three-phase motor 141 includes a stator and a rotor, and each phase AC power of a predetermined frequency is applied to the coils of the stators of each phase (a, b, c phase), and the rotor rotates. will do

Meanwhile, the control unit 310 may control the inverter control unit 320 and the switching unit 415 .

Specifically, the control unit 310, the switching unit 415, when the level of the AC power sensed by the AC power detection unit 315 is equal to or higher than a predetermined value, the switching unit 415 controls the DC power from the converter 410. It is controlled to output the DC power, and when the level of the alternating current power is less than a predetermined value, the switching unit 415 may control to output the DC power from the battery 230 .

6A to 9B are diagrams referenced for explaining the operation of the cleaner of FIG. 1 .

6A illustrates that the first mode in which the suction force is generated is performed, FIG. 6B illustrates that the second mode in which the ejection force is generated is performed, and FIG. 6C is the third mode in which the ejection force and the suction force are alternately generated. exemplifies being performed.

First, FIG. 6A illustrates that the fan motor 141 rotates in a first direction as a first mode (mode 1). That is, the forward rotation (Rco) is exemplified.

(a) of Figure 6a, under the first mode (mode 1), as a case in which the user advances the connection part 120 and the suction port 110 forward, the distance between the connection part 120 and the main body 130 is increased and that the distance is the first distance Dis1. At this time, the fan motor 141 rotates in the forward direction (Rco).

Figure 6a (b), under the first mode (mode 1), as a case in which the user moves the connection part 120 and the suction port 110 backwards, the distance between the connection part 120 and the main body 130 becomes closer. and that the distance is the second distance Dis2. At this time, the fan motor 141 rotates in the forward direction (Rco).

Meanwhile, FIG. 7A illustrates the motor speed Mwa in the first mode of FIG. 6A . The controller 310 may control the motor speed Mwa to be constant as w1 in the first mode.

Alternatively, the controller 310 may control the speed of the motor to vary in the first mode.

In general, when users use the cleaner 100 , they use the cleaner to remove foreign substances while pushing the connection part 120 and the suction port 110 forward.

Accordingly, in the first mode, the controller 310 controls the speed of the motor or the output of the motor to increase in order to increase the suction force as the distance between the connection part 120 and the suction port 110 increases, and the connection part As the distance between 120 and the suction port 110 increases, it is possible to control the speed of the motor or the output of the motor to decrease in order to reduce the suction force.

Next, FIG. 6B illustrates that the fan motor 141 rotates in the second direction as a second mode (mode 2). That is, the reverse rotation (Rcco) is exemplified. Accordingly, ejection force is generated, and through the suction port 110 , the surrounding foreign substances can be scattered by the blowing wind.

(a) of Figure 6b, under the second mode (mode 2), as a case in which the user advances the connection part 120 and the suction port 110 forward, the distance between the connection part 120 and the main body 130 increases and that the distance is the first distance Dis1. At this time, the fan motor 141 is rotated in the reverse direction (Rcco).

(b) of FIG. 6b is, under the second mode (mode 2), a case in which the user moves the connection part 120 and the suction port 110 backwards, so that the distance between the connection part 120 and the body 130 becomes closer. and that the distance is the second distance Dis2. At this time, the fan motor 141 is rotated in the reverse direction (Rcco).

Meanwhile, FIG. 7B illustrates the motor speed Mwb in the second mode of FIG. 6B . In the second mode, the controller 310 may control the motor speed Mwb in the reverse direction to be constant as -w1.

Alternatively, the controller 310 may control the speed of the motor 141 to vary in the second mode.

Accordingly, in the second mode, the controller 310 controls the speed of the motor or the output of the motor to increase in order to increase the ejection output as the distance between the connection part 120 and the inlet 110 increases, As the distance between the connection part 120 and the suction port 110 increases, the speed of the motor or the output of the motor may be controlled to decrease in order to reduce the ejection output.

Next, FIG. 6C illustrates that the fan motor 141 alternately rotates in the second direction and rotates in the first direction as a third mode (mode 3). That is, the reverse rotation Rcco and the forward rotation Rco are alternately repeated. Accordingly, the ejection force and the suction force are alternately generated, and the surrounding foreign substances are scattered by the wind blowing through the suction port 110 , and then the surrounding foreign substances scattered into the suction port 110 by the suction force generated instantaneously can be inhaled.

(a) of FIG. 6c is a case in which the user advances the connection part 120 and the suction port 110 forward under the third mode (mode 3), so that the distance between the connection part 120 and the body 130 increases and that the distance is the first distance Dis1. At this time, the fan motor 141 is rotated in the reverse direction (Rcco). As a result, ejection force is generated.

(b) of Figure 6c, under the third mode (mode 3), as a case in which the user moves the connection part 120 and the suction port 110 backwards, the distance between the connection part 120 and the main body 130 becomes closer. and that the distance is the second distance Dis2. At this time, the fan motor 141 rotates in the forward direction (Rco). As a result, suction force is generated.

On the other hand, unlike FIG. 6c, when the distance between the connection part 120 and the body 130 increases, the fan motor 141 rotates in the forward direction (Rco) to generate a suction force, and the connection part 120 and the body ( 130), when the distance between them becomes close, the fan motor 141 rotates in the reverse direction (Rcco), it is also possible to generate a split output.

Meanwhile, FIG. 7C illustrates the motor speed Mwc in the third mode of FIG. 6C . In the third mode, the control unit 310 repeats reverse rotation and forward rotation, and accordingly, the control unit 310 may control the motor speed Mwc to be alternately repeated as -w1 and w1.

Meanwhile, FIG. 7C illustrates that only the rotation direction of the motor 141 is changed, and the magnitude of the speed of the motor 141 is constant.

Alternatively, the controller 310 may control the speed of the motor 141 to vary in the third mode.

Accordingly, the control unit 310, as shown in FIG. 7d, in the third mode, as the distance between the connection unit 120 and the suction port 110 increases, the motor 1410 rotates in the reverse direction ((Rcco), but the reverse rotation speed can be controlled so that the size of is sequentially increased.

On the other hand, the fisherman 310, as shown in the motor speed (Mwd) graph of Figure 7d, in the third mode, the closer between the connection part 120 and the suction port 110, the motor 1410 forward direction (Rco) However, the rotation can be controlled so that the magnitude of the forward rotation speed is sequentially increased.

As such, due to the magnitude of the sequentially increasing motor speed, it is possible to efficiently remove foreign substances.

8A to 8B illustrate three-phase currents applied to the motor 141 in the first mode and the second mode.

8A illustrates a three-phase current (ia, ib, ic) applied to the motor 141 in the first mode. In particular, in the drawings, it is exemplified that the phase order is ia, ib, ic.

On the other hand, the inverter control unit 430 or the control unit 310 controls the phase of two phase currents among the three-phase currents in order to generate the split output of the second mode, that is, to rotate in a second direction opposite to the first direction rotation. It can be controlled to be variable.

Specifically, the inverter control unit 430 or the control unit 310 converts a phase and c phase among ia, ib, ic into inverse phases to control the phase order to be ic, ib, ia, as shown in FIG. 8B . can

Accordingly, it is possible to simply implement the first direction rotation or the second direction rotation by using one motor 141 .

On the other hand, when the suction force and the ejection force are implemented by a single motor 141 , it is preferable that the flow path is formed as the dust container 140 only when the suction force is generated on the air passage, and the flow path other than the dust container 140 is formed when the ejection force is generated. .

In this regard, it is preferable that the cleaner 100 according to the embodiment of the present invention includes two air passage guides through one motor 141 . This will be described with reference to FIGS. 9A to 9B.

9 and 9B , the cleaner 100 includes a suction port 110 , a first flow guide part 905 , a second flow guide part 907 , a dust container 140 , and a flow switch ( 112) and an outlet 111 may be provided.

A first flow guide part 905 and a second flow guide part 907, which are different from each other, may be formed between the inlet 110 and the outlet 110 .

The first flow guide part 905 guides a flow path when the suction force is generated, and a dust container 140 , a filter 1130 , and a flow path switch 112 may be disposed in the first flow guide part 905 .

The second flow path guide part 907 guides the flow path when the ejection force is generated, and may be formed separately from the first flow path guide part 905 .

Meanwhile, the dust container 140 is disposed between the suction port 110 and the fan motor 141 , is disposed in the first flow guide part 905 , and may accumulate foreign substances sucked through the suction port 110 .

Meanwhile, the flow path switch 112 is disposed between the dust container 140 and the fan motor 141 , and in the first mode, as shown in FIG. 9A , the first flow path guide part 905 is opened and the second flow path guide The part 907 operates to be closed, and in the second mode, as shown in FIG. 9B , the second flow path guide part 907 may be opened and the first flow path guide part 905 may be operated to close.

On the other hand, in the drawings, one flow switch 112 is shown to be disposed, but there are 2 A flow path switches for opening and closing each of the first flow guide part 905 and the second flow guide part 907 . It is also possible to be provided.

Meanwhile, the flow path switch 112 may be controlled by the operation of the controller 310 .

Meanwhile, in the flow switch 112 , the first flow guide part 905 is opened and the second flow guide part 907 is closed in the first mode, and the second flow guide part 907 in the second mode. ) is opened and the first flow guide part 905 is closed, and in the third mode, the first flow guide part 905 and the second flow guide part 907 may be opened alternately.

As described above, by selectively opening the first flow path guide part 905 and the second flow path guide part 907, it is possible to clearly distinguish the flow paths at the time of suction or ejection force.

Meanwhile, the above-described operating method of the cleaner is applicable to all of a vacuum cleaner, a cordless cleaner equipped with a battery, a robot cleaner, and the like.

The cleaner according to the present invention is not limited to the configuration and method of the described embodiments as described above, but the embodiments are configured by selectively combining all or part of each embodiment so that various modifications can be made. it might be

In addition, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the claims In addition, various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Claims (12)

an input unit for inputting the first mode or the second mode;
fan motor;
When the first mode is set, the fan motor is rotated in a first direction to generate suction force, and when set to the second mode, the fan motor is rotated in a second direction to generate a split output. a control unit;
a suction port through which foreign substances are sucked by the suction force in the first mode;
a body in which a dust bin for accumulating the foreign substances sucked through the suction port is disposed;
It is disposed between the suction port and the main body, at least a part of the curved or length-controlled connecting portion; and
The control unit is
When the third mode is set through the input unit, the fan motor is controlled to repeat the rotation in the second direction and the rotation in the first direction,
In the third mode operation, when the distance between the main body and the connection part increases, the fan motor is controlled to rotate in the second direction, and when the distance between the main body and the connection part decreases, the fan motor is controlled to rotate in the first direction. The method of claim 1,
a first flow path guide part for guiding the flow path when the suction force is generated;
a second flow path guide part for guiding the flow path when the ejection force is generated;
disposed between the dust bin and the fan motor, the first flow guide part is opened in the first mode, the second flow guide part is operated to be closed, and the second flow path guide part is opened in the second mode; It further includes; a flow switch operable to close the first flow guide part;
The dust bin is
It is disposed between the suction port and the fan motor, is disposed in the first flow guide part, and the foreign matter sucked through the suction port is accumulated. delete According to claim 1,
a first flow path guide part for guiding the flow path when the suction force is generated;
It further includes; a second flow guide part for guiding the flow path when the ejection force is generated,
In the first mode, the first flow guide part is opened and the second flow guide part is closed, and in the second mode, the second flow guide part is opened and the first flow guide part is closed; The cleaner according to claim 1, wherein the first flow guide part and the second flow guide part are alternately opened in the third mode. delete According to claim 1,
The control unit is
and controlling the speed of the fan motor to increase when the distance between the main body and the connection part increases. According to claim 1,
The control unit is
In the third mode operation, the size of the rotation speed is controlled to sequentially increase when rotating in the second direction, and the size of the rotation speed is controlled to sequentially increase when rotating in the first direction. According to claim 1,
Further comprising a; inverter for converting the AC power using DC power to drive the three-phase fan motor,
wherein the inverter controls the phases of two-phase currents among the three-phase currents flowing through the fan motor to vary during the second mode operation and the first mode operation. 9. The method of claim 8,
and an inverter control unit controlling the inverter based on an output current flowing through the fan motor. According to claim 1,
a first ultrasonic sensor disposed on the connection part; and
A second ultrasonic sensor disposed on the main body; further comprising,
The control unit is
The cleaner according to claim 1, wherein the distance between the connection part and the main body is calculated based on the first ultrasonic sensor and the second ultrasonic sensor. According to claim 1,
a driving unit for moving the main body; and
Further comprising; a driving driving unit for driving the driving unit;
The control unit is
Based on the distance between the main body and the connection part, the cleaner characterized in that for controlling the driving driving unit. an input unit for inputting the first mode or the second mode;
fan motor;
When the first mode is set, the fan motor is rotated in a first direction to generate suction force, and when set to the second mode, the fan motor is rotated in the second direction and the first direction is rotated repeatedly a control unit to control to do so;
a suction port through which foreign substances are sucked by the suction force in the first mode;
a body in which a dust bin for accumulating the foreign substances sucked through the suction port is disposed;
It is disposed between the suction port and the main body, at least a part of the curved or length-controlled connecting portion; and
The control unit is
In the second mode operation, when the distance between the main body and the connection part increases, the fan motor is controlled to rotate in the second direction, and when the distance between the main body and the connection part decreases, the fan motor is controlled to rotate in the first direction.

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